Useful, Destructive Technology Essay Example

Helpful, Destructive Technology Paper In what manner would technology be able to be so valuable and damaging simultaneously? The cellphone assists with correspondence, yet additionally it can get me in a tough situation with the law. Unfazed by we likely have various sorts of innovation my three most significant bits of innovation are cellphone, PC, and psd radio. In this period, innovation is use in numerous events, myself innovation I use is my telephone is the thing that I take with me wherever I go. My telephone is dark and I utilize my telephone to check any arrangements in my schedule, which is very valuable. With regards to class or in any event, when I need to work in the mornings, I’m continually stamping occasions down in my schedule. Also, I utilize my IPhone to jump on various social media’s, for example, Snap Chat, Instagram, and Twitter. I for the most part jump on Instagram and transfer pictures. Thirdly I utilize my telephone to take recordings of me when I’m playing softball. Being t hat my telephone takes extraordinary recordings and encourages me keep up to any significant updates and times. Generally, my telephone encourages me remain in contact with my family just as my companions. Another helpful innovation is my PC. I utilize my PC to do my tasks and schoolwork particularly since I began to set off for college of the Desert. It’s not only for training purposes that I utilize my PC to download music and copy CD for my family in which they are continually requesting that I download and copy CD for them. Second, what I utilize my PC is to watch Netflix on my PC however to this time they haven’t been any acceptable motion pictures or TVs appears on Netflix. Three I like to play with my image and fix them around or even make schools and make motion pictures with the photos. We will compose a custom article test on Useful, Destructive Technology explicitly for you for just $16.38 $13.9/page Request now We will compose a custom article test on Useful, Destructive Technology explicitly for you FOR ONLY $16.38 $13.9/page Recruit Writer We will compose a custom article test on Useful, Destructive Technology explicitly for you FOR ONLY $16.38 $13.9/page Recruit Writer In conclusion, another valuable innovation is my PSD Radio I utilize my radio when there’s occasions with the Riverside County Sheriff Explorers. We use them to correspondence with different travelers or even the advasiors and let them realize how were doing or on the off chance that we need any assistance. We could just utilize are PSD radio are just to be utilized for m

Art Essay Example | Topics and Well Written Essays - 2000 words - 1

Workmanship - Essay Example Most likely I have consistently been impacted with magazine spread photographs, for example, the one underneath. I have consistently felt that a perfect female should look simply like what the spread photographs and advert pictures lecture us, and nothing less. In addition, these spread photographs are consistently of big names and models, and all things considered, my observation has consistently been molded to accept that some other female need to coordinate the superstar measures. This picture not just impacts the conviction and conduct of people, yet in addition characterizes the way of life of today’s society, whereby a perfect human to be worthy is given norms that must be accomplished. The craftsman proclamation going with this photography is, â€Å"Great American Women†. This unequivocally uncovers how the present culture characterizes significance of female ladies. For instance, they must be design hotshot, present day ladies, and all these accompany super-thin bodies. This picture is exceptionally appealing and communicates something specific both to little youngsters and adult ladies to endeavor to look like such celebs on the grounds that those are the socially adequate guidelines in today’s society. Thus, individuals likewise decide to see these photos in one point of view, that is, the impact on body gauges, for example, amazingly small midsection and by and large thin bodies. Notwithstanding, there are a few negative effects that the above picture dispenses in the general public, particularly among the female populace. For instance, little youngsters grow up to accept that in the event that they don't accomplish such body sizes than they are n ot commendable. In this way, I am going to evaluate this picture regarding the negative impacts that it produces in the general public, for example, inclination for restorative medical procedure, typification of ladies bodies concerning sex sells and media misrepresentation of celeb allure and fabulousness. The picture joins women’s excellence to the faction of slimness whereby the present society stresses, not on the substance, yet on the outside of person, and subsequently social and financial

Extended Definition Essay Topics Can Help You Learn More About An Entire Topic

Extended Definition Essay Topics Can Help You Learn More About An Entire TopicWhen looking for a lot of information and writing power, Extended Definition Essay Topics are the way to go. Taking a long exam such as this will take a little more than just hitting the 'return' key on your keyboard. Having the proper supplemental reading before hand will keep you from getting all mixed up during the exam and will ensure that you do not forget what you learned during the test.While there are no substitutes for dictionary definitions and explanations, these types of essays are also good for learning the science behind a topic or subject. While one can't fully comprehend something without understanding it in its scientific aspects, a good educator knows how to teach that which cannot be understood without a certain study in place. Students can use this knowledge and make more intelligent decisions about which courses to take and which to skip.For basic science, in order to be a successful st udent, it is imperative that you understand the basics of biology and chemistry. Extended Definition Essay Topics also provide a great venue for students to learn about the study of physics and chemistry. Although physics and chemistry are taught to a very basic level, they are required elements in every form of science.Students have a lot of different Extended Definition Essay Topics to choose from and this provides them with a great chance to learn about other subjects that they may not have taken the time to learn. In order to become a well-rounded student, it is important that students know that there are different subjects that are taught in a basic biology class. These types of classes will help students to gain an understanding of things that they may not have learned in any other class.It is also not a bad idea to learn about other types of subjects that are not actually taught in a biology course, but that a student may have interest in. Although the study of psychology may not be as important as biology, psychology is still a very important aspect of psychology. Extended Definition Essay Topics will help students to gain an understanding of the different theories of psychology that are currently taught.Not only do students get a great amount of knowledge by taking these different subjects, but they also get a tremendous amount of experience in their daily lives. As their name suggests, Extended Definition Essay Topics provide the students with a lengthy piece of work that includes a large amount of words. With each new word, students gain the knowledge of the various types of words that are taught in order to make educated guesses about the topic of the essay.When searching for Extended Definition Essay Topics, the students can find many resources available online. As long as the students have a computer, they can find a variety of options to choose from. Not only can they find a wide variety of these essays, but they can also use these essays to wri te their own short papers to help with their education.Because Extended Definition Essay Topics are written using many different types of words, students can research the various types of words and then make educated guesses about the words. There are many different websites that offer these articles and many of them have compiled a large amount of different articles on various topics. These articles provide students with a way to learn about topics that they may not have taken the time to learn before, or to learn about topics that they had never even heard of before.

William Shakespeares Hamlet as a Revenge Tragedy Essay

William Shakespeares Hamlet as a Revenge Tragedy Revenge Tragedy was a genre which lasted from 1590 until 1615. The genre appealed to the Elizabethan audience’s desire for blood and violence without emotional depth. ================================================================== Revenge tragedies originated in the writings of the Roman Seneca (4BC-AD65) whose plays heavily influenced Elizabethan dramatists. Seneca’s tragedies, using stories derived from mythology emphasised bloody action, horrific incidents and ranting speeches. The devices Seneca used in his tragedies were later imitated by Elizabethan playwrights. These included the five act structure, the appearance of ghosts, the†¦show more content†¦Hamlet delays the whole process of revenge, and this is more subtle than Kyd’s Spanish Tragedy. Bernard Lott believes that when Hamlets speeches are straightened out the evident complications of phraseology and syntax remain to sense reflection of the inner turmoil in his soul. This is clearly shown in Hamlets To be or not to be soliloquy. Soliloquies in general show characters’ innermost emotions and are frequently used in revenge tragedies. Shakespeare uses speech to reflect characters’ roles and status; superior figures such as Hamlet speak in verse, whereas characters with less significance to the play speak in prose. This dramatic effect raises ‘Hamlet’ above the typical Revenge Tragedy. Laertes and Hamlet are the two main characters linked to revenge throughout Hamlet’. They are in the same situation, with Hamlet stating by the image of my cause I see the portraiture of his. Laertes is the stereotypical revenger. He is quick to assume that Claudius murdered his father and goes to seek him with a riotous head and only one thing on his mind. He will dare damnation to get revenge for his father and will die for his family honour. Hamlet alternately spends most of his time contemplating revenge and deciding how he will get it on Claudius. Hamlet: ‘conscience does make cowards of us all. Levin says, â€Å"Hamlet is the man who thinks too much,Show MoreRelatedProblems in the Revenge Tragedy: William Shakespeares Hamlet2646 Words   |  11 Pages Shakespeares Hamlet presents the generic elements found in Renaissance revenge tragedies (Revenge Tragedy). However, although Hamlet is a revenge tragedy by definition, Shakespeare complicates the basic revenge plot by creating three revenge plots out of one. By adding significant innovations, Shakespeare creates three concentric rings of revenge (Frye 90), depicting an indecisive protagonist who is an intellectual rather than a physical hero, an ambiguous ghost, and several problematic aspectsRead MoreWilliam Shakespeares Hamlet As A Traditional Revenge Tragedy1380 Words   |  6 PagesWilliam Shakespeare’s Hamlet is one of the world’s most renowned plays, one which has stood the test of time over the course of 400 years, finding relevance even today. A complex and sophisticated work, Hamlet is a masterf ul weaving of the myriad of components that make up the human experience; it delicately touches upon such topics as death, romance, vengeance, and mania, among several others. Being so intricate and involuted, Hamlet has been interpreted in countless fashions since its conceptionRead More Revenge and Vengeance in Shakespeares Hamlet - Why Revenge?1054 Words   |  5 PagesRevenge in Hamlet        Ã‚  Ã‚   In Elizabethan times, a type of play known as a revenge tragedy became popular. These plays revolved around, ... the revenge of a father for a son or vice versa, the revenge being directed by the ghost of the murdered man... (Harmon and Holman #6). Other characteristics include real or pretend insanity, philosophic soliloquies, hesitation on the part of the protagonist, conspiracy, and the use of horror. William Shakespeares Hamlet fully satisfies each of theseRead MoreWilliam Shakespeare s Hamlet - Longing For Revenge1304 Words   |  6 PagesLonging for Revenge William Shakespeare was born in England in April of 1564 and was an English poet and playwright . Shakespeare is universally known as the greatest writer in the English language. Shakespeare frequently produced tragedies that are continuously acted out today, along with many plays and sonnets.. Although Shakespeare is seen today as a great writer who changed the world, his reputation did not rise to these heights until around the 19th century. In all of Shakespeare’s astoundingRead MoreEmily Bronte s Hamlet And Wuthering Heights 1307 Words   |  6 PagesRevenge in Hamlet and Wuthering Heights Abstract This concise paper is an analogical study. It consists of three parts; the first one defines the word revenge and explains where the theme of revenge comes from and how it has expended to other types of literary works until these days. The second part of the study, is supported by exemplifies Shakespeare’s tragedy, Hamlet. The last part of the paper, provides Emily Brontà «Ã¢â‚¬â„¢s novel, Wuthering Heights as a good example; because one of the main themesRead MoreThe Characters Of Foils In William Shakespeares Hamlet860 Words   |  4 Pages Foils In Hamlet   Ã‚     Ã‚  Ã‚  Ã‚  In fiction, a foil is a character whom contrasts with another character in the story, typically the protagonist. The foil is able to highlight certain aspects of their opposing character. A foil can differ dramatically or be extremely similar but tends to have key qualities that distinguish the two apart from each other. When an author uses a foil in literature they are emphasizing not only strengths and weaknesses the main character poses, but also understanding the obviousRead MoreThe Libation Bearers and Hamlet1308 Words   |  6 PagesThe Libation Bearers and Hamlet Many of Shakespeare’s plays draw from classical Greek themes, plot and metaphors. The tragedies of Sophocles, Aeschylus, Euripides and Homer have themes like royal murders, assassinations by near relatives, the supernatural, ghostly visits, and vengeful spirits of the dead- themes which reappear in Shakespeare’s tragedies with a difference. Shakespeare’s tragic hero Hamlet and Aeschylus’s Orestes have a great deal in common. Both the plays are set in a time when theRead MoreHamlet, Prince of Denmark825 Words   |  4 PagesHamlet, Prince of Denmark By William Shakespeare Submitted by: Tariq Khan Dated: Monday, 24th September, 2012 Hamlet as a Tragedy by William Shakespeare 1.1. Brief Introduction to Tragedy: Greek and English: Elizabethan tragedy is traced back to Greek tragedy, since Greeks are said to have pioneered the Western knowledge, be it Science, Arts, or Humanities—not necessarily Technology. The rich contribution of Greek dramatists like Sophocles, Euripides, Aeschylus and AristophanesRead MoreRevenge in Hamlet1070 Words   |  5 PagesAmongst the most tragic story lines of Shakespeare’s plays, Hamlet is definitely one of them. In William Shakespeare’s play Hamlet, Fortinbras, Hamlet and Laertes each demonstrate the ways revenge leads to tragedy when they are unable to cope with the loss of a loved one. Young Fortinbras has intentions of honoring his father’s loss by gaining the territory that was rightfully theirs. The lengths he is willing to go compare to Hamlet’s determination to seek revenge upon his uncle, and father’s murdererRead MoreThe Libation Bearers and Hamlet1302 Words   |  6 PagesThe Libation Bearers and Hamlet Many of Shakespeare’s plays draw from classical Greek themes, plot and metaphors. The tragedies of Sophocles, Aeschylus, Euripides and Homer have themes like royal murders, assassinations by near relatives, the supernatural, ghostly visits, and vengeful spirits of the dead- themes which reappear in Shakespeare’s tragedies with a difference. Shakespeare’s tragic hero Hamlet and Aeschylus’s Orestes have a great deal in common. Both the plays are set in a time when

Edgar Allan Poes Philosophy of Death

Ralph Waldo Emerson once wrote: Talent alone cannot make the writer. There must be a man behind the book. There was a man behind The Cask of Amontillado, The Fall of the House of Usher, The Black Cat, and poems like Annabel Lee, A Dream Within a Dream, and  The Raven. That man—Edgar Allan Poe—was talented, but he was also eccentric and prone to alcoholism—having experienced more than his share of tragedies. But, what stands out even more prominently than the tragedy of Edgar Allan Poes life is his philosophy of death. Early Life Orphaned at the age of two,  Edgar Allan Poe was taken in by John Allan. Although Poes foster father educated him and provided for him, Allan eventually disinherited him. Poe was left penniless, earning a meager living by writing reviews, stories, literary criticism, and poetry. All of his writing and his editorial work was not enough to bring him and his family above the level of mere subsistence, and his drinking made it difficult for him to hold a job. Inspiration for Horror Arising from such a stark background, Poe has become a classical phenomenon, known for the gothic horror  he created in The Fall of the House of Usher and other works. Who can forget The Tell-Tale Heart and The Cask of Amontillado? Every Halloween those stories come to haunt us. On the darkest night, when we sit around the campfire and tell horrible tales, Poes stories of horror, grotesque death, and madness are told again. Why did he write about such horrible events? About the calculated and murderous entombment of Fortunato, as he writes, A succession of loud and shrill screams, bursting suddenly from the throat of the chained form, seemed to thrust me violently back. For a brief moment—I trembled. Was it disillusionment with life that drove him to these grotesque scenes? Or was it some acceptance that death was inevitable and horrible, that it sneaks up like a thief in the night, leaving madness and tragedy in its wake? Or, is it something more to do with the last lines of The Premature Burial? There are moments when, even to the sober eye of Reason, the world of our sad Humanity may assume the semblance of a Hell... Alas! The grim legion of sepulchral terrors cannot be regarded as altogether fanciful... they must sleep, or they will devour us—they must be suffered to slumber, or we perish. Perhaps death offered some answer for Poe. Perhaps escape. Perhaps only more questions—about why he still lived, why his life was so hard, why his genius was so little recognized. He died as he had lived: a tragic, pointless death. Found in the gutter, apparently the victim of an election gang who used alcoholics to vote for their candidate. Taken to a hospital, Poe died four days later and was buried in a Baltimore cemetery next to his wife. If he was not well-loved in his time (or at least not as well-appreciated as he might have been), his tales at least have taken on a life of their own. Hes recognized as the founder of the detective story (for works like The Purloined Letter, the best of his detective stories). He has influenced culture and literature; and his figure is placed beside the literary greats in history for his poetry, literary criticism, stories, and other works. His view of death may have been filled with darkness, foreboding, and disillusionment. But, his works have lasted beyond the horror to become classics.

Lifes Greatest Lesson Essay - 1638 Words

Life’s Greatest Lesson nbsp;nbsp;nbsp;nbsp;nbsp;â€Å"A teacher affects eternity; he can never tell where his influence stops.† As Henry Adams stated, and is the summary of the impervious bond between the characters Mitch and Morrie, in Tuesdays with Morrie. Amyotrophic lateral sclerosis (ALS) often referred to as Lou Gehrig’s disease is a form of motor neuron diseases. It is a rare disorder in which the nerves that control muscular activity degenerate within the brain and spinal cord. What results is weakness and wasting away of the muscles. The cause is unknown. About one to two cases of ALS are diagnosed annually per 100,000 people in the US. (Lou) Sufferers will notice weakness in the hands and arms accompanied by wasting of the†¦show more content†¦Morrie Schwartz was a man of great wisdom who loved and enjoyed to see and experience the simplicity of life, something beyond life’s most challenging and unanswered mysteries. It is from Morrie that we learn that life is most happily experienced when enjoyed and fulfilled to its highest ability. Morrie touched the lives of many, and he will always be remembered for his sincerity and his compassion for life and for love. The lessons Morrie loved to teach were of his own experience with life. In his lessons, Morrie advises Mitch to reject the popular culture in favor of creating his own. The individualistic culture Morrie encourages Mitch to create for him is a culture founded on love, acceptance, and human goodness, a culture that upholds a set of ethical values unlike the mores that popular culture endorses. Popular culture, Morrie says, is founded on greed, selfishness, and superficiality, which he urges Mitch to overcome. Morrie also stresses that he and Mitch must accept death and aging, as both are inevitable. A symbol that represents Morrie’s life throughout the book is the pink hibiscus plant. As Morrie’s body deteriorates, so does the condition of the hibiscus plant. The plant’s pink petals wither and fall as Morrie grows increasingly dependent on his aides and on oxygen. As his death approached, so does the death of the plant. It is used as a metaphor for MorrieShow MoreRelatedLifes Greatest Lesson1696 Words   |  7 PagesLifes Greatest Lesson A teacher affects eternity; he can never tell where his influence stops. As Henry Adams stated, and is the summary of the impervious bond between the characters Mitch and Morrie, in Tuesdays with Morrie. Amyotrophic lateral sclerosis (ALS) often referred to as Lou Gehrigs disease is a form of motor neuron diseases. It is a rare disorder in which the nerves that control muscular activity degenerate within the brain and spinal cord. What results is weakness and wastingRead MoreTuesdays with Morrie Essay1074 Words   |  5 Pagesâ€Å"It is through literature that we learn about life. Through literature we profit from the experiences of others, comparing them with our own.† - Bob Cameron The essay question: Using reader-response theory and the quote by Bob Cameron, discuss how effectively Mitch Albom, author of Tuesdays with Morrie, uses plot and story, character development, point of view, theme, and symbols to convey his mesage. Include your personal thoughts and views, as well as textual references, to support your opinionsRead MoreIt Is A Simple Law Of Attraction1702 Words   |  7 Pagesthose around us feel good.† Those words are not just words they greatest piece of advice that anyone has ever gave to me. They weren’t words given to me by just anyone, but my mom. She gave me this advice when I was going through some hard times in my life where I felt like everything was just going wrong. But she whipped me right out of that slump and said hey you get back what you put in. My mom has always been this person in my life who just seems to know what to say at the right time. She isRead MoreReflections upon Urbans Lifes Greatest Lessons779 Words à ‚  |  3 PagesChapter 3: Life is Also Funny†¦ and Incredibly Funny In the book, Life’s Greatest Lessons: 20 Things That Matter by Hal Urban, the author describes how we as human beings must be able to look at the funny side of life. Urban tells the readers that one major key to life is to make your life funny. By making life funny, we relieve or forget about problems that are occurring in everyday life. From being a tension breaker, to having health benefits that include creating endorphins, laughter as the authorRead MoreCopland Essay861 Words   |  4 PagesUnfortunately, his works are no longer heard or performed often enough today. In my opinion, Copland is one of the greatest American performers in music history, but he is not given the recognition he deserves by todays society. By looking at Coplands works and analyzing his Billy the Kid, the necessary proof of his greatness will, without question, show the fact that he is one of the greatest American composers of all time. Aaron Copland, whose family name was changed from Kapland by immigrationRead MoreEssay on Summary of Education Book by Ellen G White1479 Words   |  6 PagesSummary Education is needed in the life of the people of God. True education means more than a preparation for life that is now. It has to with the whole being and with the whole period of existence possible to man. It is the harmonious development of the physical, mental, and spiritual powers. The world has many great teacher but God stands higher than them which is the real soiuce of knowledge. The holy scriptures are perfect standard of truth and should be given the highest place in educationRead MorePersonal Statement : Personal Assessment917 Words   |  4 PagesPersonal Assessment I really want to start this off by saying thank you, Jenna, for being one of the greatest professors I have had at FAU and one of the greatest acting teachers I have had during my eleven years of theatrical training. During my last three classes with you, I have learned so much about acting and theatre, but so much more about myself. You allowed me to discover how much more there is to me than just what I originally thought. I was able to gain so much confidence throughout yourRead MoreKnowledge is Power for Success Essay574 Words   |  3 Pagesbecause of my grandmother. The desire of gaining something new each day is the greatest gift of knowledge. In order to obtain this gift you must engage to receive the benefits. To have a successful education one must engage, value, and gain knowledge. The transition from high school to college is a life changing experience. One must learn time management; new study habits, and adapt to the college life. The first lesson I had to learn was how to engage in classes. Without engaging in the classesRead More Life Of Mozart Essay670 Words   |  3 Pages The Life of Wolfgang Amadeus Mozart nbsp;nbsp;nbsp;nbsp;nbsp;Wolfgang Amadeus Mozart (1756-91) is regarded as the greatest composer who ever lived. He began writing minuets at the age of 5,and by the time he died in 1791 at the age of 35, he had produced 626 cataloged works. â€Å" Mozart has enriched the concerto form with a larger number of masterpieces than any other composer.†1 nbsp;nbsp;nbsp;nbsp;nbsp;Wolfgang Amadeus Mozart is said to be the greatest genius in western music history.Read MoreThe Road Of Immortality And Glory940 Words   |  4 PagesHowever, their journeys in trying to achieve these things are quite the same. Through the journey of trying to obtain immortality and glory, Gilgamesh and Achilles teach their audience the true way a person is able to gain immortality and glory in life. Although greatness, honor, and dignity are shared influences on the motivations of both characters, their personal motivations for wanting to achieve such things are different. Gilgamesh’s motivation comes from the death of his companion, Enkidu.

Of ceremonies and respect Essay Example For Students

Of ceremonies and respect Essay He that is only real, had need have exceeding great parts of virtue; as the stone had need to be rich, that is set without foil. But if a man mark it well, it is, in praise and commendation of men, as it is in gettings and gains: for the proverb is true, that light gains make heavy purses; for light gains come thick, whereas great, come but now and then. So it is true, that small matters win great commendation, because they are continually in use and in note: whereas the occasion of any great virtue, cometh but on festivals. Therefore it doth much add to a mans reputation, and is as Queen Isabella said like perpetual letters commendatory, to have good forms. To attain them, it almost sufficeth not to despise them; for so shall a man observe them in others; and let him trust himself with the rest. For if he labor too much to express them, he shall lose their grace; which is to be natural and unaffected. Some mens behavior is like a verse, wherein every syllable is measured; how can a man comprehend great matters, that breaketh his mind too much, to small observations? Not to use ceremonies at all, is to teach others not to use them again; and so diminisheth respect to himself; especially they be not to be omitted, to strangers and formal natures; but the dwelling upon them, and exalting them above the moon, is not only tedious, but doth diminish the faith and credit of him that speaks. And certainly, there is a kind of conveying, of effectual and imprinting passages amongst compliments, which is of singular use, if a man can hit upon it. Amongst a mans peers, a man shall be sure of familiarity; and therefore it is good, a little to keep state. Amongst a mans inferiors one shall be sure of reverence; and therefore it is good, a little to be familiar. He that is too much in anything, so that he giveth another occasion of satiety, maketh himself cheap. To apply ones self to others, is good; so it be with demonstration, that a man doth it upon regard, and not upon facility. It is a good precept generally, in seconding another, yet to add somewhat of ones own: as if you will grant his opinion, let it be with some distinction; if you will follow his motion, let it be with condition; if you allow his counsel let it be with alleging further reason. Men had need beware, how they be too perfect in compliments; for be they never so sufficient otherwise, their enviers will be sure to give them that attribute, to the disadvantage of their greater virtues. It is loss also in business, to be too full of respects, or to be curious, in observing times and opportunities. Salomon saith, He that considereth the wind, shall not sow, and he that looketh to the clouds, shall not reap. A wise man will make more opportunities, than he finds. Mens behavior should be, like their apparel, not too strait or point device, but free for exercise or motion.

Characteristics of the skin care and cosmetic industry in China

How to Make Your Book Review More Critical with an Outline

How to Make Your Book Review More Critical with an Outline How to Make Your Book Review More Critical with an Outline? Setting out to write a critical book review is a daunting task. Something about the word ‘critical’ seems to conjure up scary visions of having to wade through huge tomes of literary theory that threaten to swallow your limited analyzing abilities as a student. A review at the end of the day is supposed to be critical where you share your opinion on a specific topic and it tells the makers or readers your honest opinion on it. There are many reviewers out there, criticizing all kinds of books including fiction and essays, but not all these reviewers or their opinions are valued. At times, it is only because they’re lacking a proper outline and hence are not able to write their thoughts properly. Why Have an Outline for a Critical Book Review? Like any other assignment set by a systematically produced curriculum, a critical book review is also easy. You simply apply a systematic approach and break it into parts. You jot down the essential elements you need to include. Working according to an outline is a great way to accomplish your goals. An outline serves as a systematic tool that will keep you on track. You can always refer to your outline to make sure you are not missing anything. Moreover, we mention some tips on actual critical book review writing, so it’s two birds with one shot. This guide will tell you how to prepare an outline in four easy steps which correspond to the recommended sections. Introduction (1-2 Paragraphs, Half a Page) Like any good piece of writing, start with an introduction. The specific form is up to you, choose a quotation that you liked, a particularly powerful scene in the book, even a personal anecdote which ties into the broader opinion you hold of the book. The goal is to capture the reader’s attention and keep them hooked. Include an overview of the book where you summarize the plot and also present an expression of your overall judgment. Summary (1 Page or about 23 Lines of Typed Text) A summary is a brief discussion of the major themes, concepts, and ideas presented in the book. It is recommended that you write this entirely in your own words. Present a condensed picture of the book. If your summary contains spoilers, make sure you warn your readers about it. Critical Evaluation (3 Pages) The third is an in-depth section which includes the reviewer’s reactions to the thoughts of the author. Most students often find it challenging to be critical, probably because they are under the impression that in order to critique something you have to possess expert-level knowledge. This is an unfortunate opinion that must be dispelled from your mind. Conclusion (1-2 Paragraphs, Half a Page) A short section which shows the overall impression and evaluation arrived at by the reviewer. It can be written in first person if desired and should include: Things which you learned from the book; Whether you would recommend the book to other people. A critique is simply a collection of responses, reactions and thoughts to what you are reading. No one expects you to produce an expert-level critique if you are only a learner. The best way to make this easy is to write down your thoughts and impressions while you are reading the book. Jot down any questions or aspects you like and at the end of your read you will have a significant set of notes that will make the critique a breeze. Here are the aspects that you need to include: Your overall opinion and the reasons behind it. How did the book make you feel? Was the writing able to hold your interest? What was the author trying to communicate? How well- or not- did the author present his or her points, ideas and assumptions? Did you detect any underlying philosophy in the book? Is the author’s view objective? How does the book fit into the context of the course? How useful are the footnotes, index, bibliography etc.? Is the book a useful contribution to the field in general? What are the strengths/weaknesses of the book? Do you have unanswered questions from what book? What would you like to add or remove from the book to make it better? You need to mention these questions in your outline to know what to focus on in your writing. Then, while creating the actual book review, formulate these sections as a properly structured essay that includes topic sentences and logical transitions. These outline guidelines are extremely important because the moment you detail them, you’ll have a clear structure in your head. We hope that they will make your book review as critical as possible (in a good way).

Nuclear Power Assignment Example | Topics and Well Written Essays - 500 words - 1

Nuclear Power - Assignment Example to Cravens and Rhodes (2008), developing nuclear power will lead to low cost of power because uranium, which is the key raw material of nuclear energy does not commonly experience frequent price fluctuations as compared to other fossil fuels. Secondly, nuclear power does not witness frequent interruptions as compared to hydroelectric power and Mahaffey (2011), further stated that it could run for more than 700 days uninterrupted. Thirdly, developing nuclear energy leads to less environmental pollution because they have a minimal emission of greenhouse gases. According to Cravens and Rhodes (2008), the main disadvantages of developing nuclear power stems from safety concerns that are attributed to the raw materials used in the development process and even the waste or by products that originate from nuclear power plants. For example Cravens and Rhodes (2008), stated that uranium that is used in developing nuclear energy is unstable and therefore its mining , transportation, and even transformation is a dangerous process of which in case of an accident the consequences can be grave. Secondly, the waste products that result from nuclear energy development are usually radioactive and hence if they find their way to the surrounding environment they can pose serious dangers to the health of the people, animals, and plants. Thirdly, in case of an accident at a nuclear power plant the consequences are usually grave and they can last for many years. According to Mahaffey (2011), the 1986 Chernobyl nuclear disaster is one of the worst nuclear disasters in the World’s history, which was caused by a fire explosion at the nuclear power plant that lead to deaths, injuries, and the emissions of large quantities of radioactive particles that spread wide across the region. The disaster is still fresh in the minds of many since its effects are still evident up to date because of various cancer cases and deformities that are attributed to the 20th century accident. Mahaffey

Judaism Research Paper Example | Topics and Well Written Essays - 2000 words

Judaism - Research Paper Example This paper analyses Judaism and its comparison with Christianity. Moreover, Holidays concerning Judaism, Traditions of Judaism, How Judaism shapes ones life, Most of the beliefs and traditions of Christians and Jews are one and the same. In fact both of them accept the existence of same God and believe in prophets up to Moses. Judaism is based on the teachings of Moses whereas Christianity is based on the teachings of Jesus Christ. Jews believe that the Messiah has not come yet and Jesus Christ was only an ordinary person; not the Messiah offered by the God. Christians and Jews have more common elements in their beliefs and customs, but they strongly disagree on the issue of accepting Jesus Christ as the son of God or Messiah. Christians believe that Jesus was the son of God, the Messiah promised by the God and human can attain salvation only through the belief in Jesus Christ. But Jews believe that the Messiah is yet to come and Jesus Christ was not the one offered by the God. The main difference between the beliefs of Jews and Christians lie on the issue of Jesus Christ. As per the Jews beliefs, Messiah should have certain peculiarities other than ordinary people. Jews don’t have any beliefs in the miracles performed by Jesus Christ. They believed that the miracles performed by Jesus were with the help of magical powers rather than any godly power. They argue that the offered Messiah will come as a natural person using the natural means of birth. Moreover Jews thought that the coming Messiah will do something to bring back all the Jews back to the offered land ‘Canaan’. Jews thought that the coming Messiah will definitely build one more temple where as the Jesus has not even attempt to make any temple. (The Good News Bible, Ezekiel 37:26-28) â€Å"Biblical verses "referring" to Jesus are mistranslations and Jewish belief is based on national revelation† (Rabbi Simmons) Jews, not even consider Jesus as a prophet and they

Design and Planning of 2G, 3G and Channel Modelling of 4G

Design and Planning of 2G, 3G and Channel Modelling of 4G Chapter 1 Fundamentals of Cellular Communication In this chapter, all the background knowledge which is required for this project has been discussed. 1.1 Cell The area covered by single BTS(base transceiver station) is known as cell. 1.1.1 Shape of cell The shape of cell depends upon the coverage of the base station. The actual coverage of the base station is called footprint and is found with the help of measurements from the field. We can make our calculations easier by using the shape of circle noting that there would not be spaces between them. As, the purpose is to provide coverage to each and every subscriber. But if there are spaces between the coverage areas then the person in that specific area will not be able to get any coverage. To cover the problem of interleaving spaces, the shapes that can be used theoretically are: Square Triangle Hexagon But in selection criteria one thing must be kept in mind that every person within a cell get same coverage specially the person at the edges of the cell. So hexagon is the shape among these three choices with largest coverage area. Its coverage area and shape is closest to the circle and it helps tessellate. Omnidirectional antenna is used in the center of it, and if we want to use sectored directional antenna then it must be used at any three corners of it. 1.1.2 Area of the Cell The area of a cell with radius R is shown in figure 1.1(a), is given by: 1.2 Frequency planning While developing the cellular system, it has limited capacity due to the given bandwidth. So, in order to solve this problem Cellular Systems have to depends on an intelligent and more use of channels through out the area. Every cellular base station is alloted a group of different radio channels to be used in a cell. Base station in the adjacent cells use completely different frequencies. For this purpose antennas are used such that their power may get limited within the cell. In this way the allocated frequencies maybe reused in different cells again. The process of allocating and selecting channel groups for all the base stations in a system is known as frequency reuse or frequency planning. We use two types of antennas: Omnidirectional antenna Sectored directional antenna Omnidirectional antennas are used in the cells which are centrally excited and sectored directional antennas are used in the edge excite cells. To understand the concept of frequency reuse, let us say that S are the total no. of duplex channels available for use, k number of channels given to each cell i.e. k S=kN (1.2) Where N is no. of cells which uses the complete set of available frequencies known as cluster frequency reuse factor (1.3) Each cell is in the cluster is assigned of the available channels. The radio frequency from 3Hz to 3000GHz are separated into 12 bands, as shown in the table. Frequency spectrum has different propagation characteristics. As far as concerned to the mobile communication, we only pay attention to the UHF spectrum. 1.2.1 Cluster size(N) If we use N large (a large cluster), the ratio of the cell radius and the distance between co-channel decreases, which causes weaker co-channel interference. But if N is smaller, by keeping the cell size same then we more clusters are needed to cover an area. Hence the capacity is increased. So if we use N larger then the quality of voice is good but the capacity is less and vice versa. 1.3 Interference Interference is one of the major factor in the capacity and performance of a cellular network. The interference is due to a call in the neighbouring cell, another base station operating in the same frequency. Interference causes crosstalk and noise. There are two types of interference. Adjacent channel interference Co-channel interference 1.3.1 Adjacent channel interference Adjacent channel interference results from the signals which are side by side in frequencies to the desires signal. Adjacent channel interference is caused by wrong filtering, like incomplete filtering of not wanted modulation in frequency modulation (FM) systems, not proper tuning, or poor control of frequency. It causes problem. Adjacent channel interference can be reduced by careful channel assignment, filtering and power control within a cell. 1.3.2 Co-channel interference Co-channel cells are the cell which use the same set of frequencies. For example, in the figure 1.2 all the letter ‘A are the co-channel cell because they use the same set of frequencies. Interference due to the co-channel cells is called co-channel interference. It can be reduced by using greater value of N(cluster size). If D is the distance between the co-channel cells and R is radius of the cell, then by using greater value of N the ratio between D to R is increased hence reducing co-channel interference. The relation can b written as: 1.4 Improving coverage and capacity The number of channels assigned to a cell became insufficiently as the demand of wireless system increases. To provide more channels per coverage, some techniques are introduced which improve the coverage and capacity. These techniques are: Cell splitting Sectoring Microcell zone concept 1.4.1 Cell Splitting Cell splitting is the process of dividing a cell into smaller cells. In this process we reduce the antenna height and power of the base station. Cell splitting increases the capacity by increasing frequency reuse factor. In cell splitting Channel assignment techniques remain the same. SIR remains the same Trunking inefficiency do not get suffer. Trunking efficiency is the measure of the number of users which can be offered a particular Grade of service with the specific configuration of the channels. The grade of service (GOS) is the measure of the ability to access a trunked system during the busy hours. The radius of the new cell is reduce to half. So power is also reduced. 1.4.2 Sectoring Sectoring uses directional antennas for controlling the interferences and frequency reuse of channels. The co-channel interference is reduced and thus increasing system performance by using directional antenna. A cell is normally divided into three 120 sectors or six 60 °sectors. When sectoring is used, the channels used in a particular cell are broken into sectored groups and are used only within a particular sector. The no. of channels get divided into sectored groups, so the trunking efficiency is reduced. In sectoring SIR is improved by reducing interference and trunking efficiency is reduced. Handoff increased in sectoring. The s/I improvement allows to decrease the cluster size N in order to improve the frequency reuse, and thus the system capacity. Further improvements in s/I is achieved by downtilting the sector antennas. 1.4.3 Microcell Zone Concept Microcell Zone concept distributes the coverage of a cell and extends the cell boundry to hard to reach places. It maintains the S/I and trunking efficiency, and increases the coverage and capacity of an area. 1.5 Radio wave propagation Radio waves propagate through different channels and by different ways to reach the MS(Mobile Station). It also depends upon the speed of the wave. The propagation of radio waves depends into two types: Large scale propagation Small scale propagation(Fading) 1.5.1 Large scale propagation The model predicts that the average signal strength for all transmitter-receiver (TR) distance on a scale known as large scale propogation model. 1.5.2 Small scale propagation The models that predicts the rapid fluctuation of the received signal strength over a short distance known as small scale propagation model or fading. 1.5.3 Free Space Propagation Model The free space propagation model is used when the transmitter and receiver have line of sight (LOS) between them to predict the received signal strength. Where Pr = received power. Pt = transmitted power, Gt and Gr = transmitter and receiver antenna gain, do= T-R separation, L = system loss factor ÃŽ » = wavelength. 1.6 Propagation Mechanisms The propagation mechanisms which effect propagation are: Reflection Scattering Diffraction Reach directly (in case of Line of Sight) If there is line of sight signal reach the Mobile station directly and signal power is very strong. 1.6.1 Reflection Reflection occurs when an electromagnetic wave falls upon an object which is large as compare to the wavelength of the wave. It occurs from buildings, walls, surface of earth etc. 1.6.2 Diffraction Diffraction happens when the path between the transmitters and receivers is disturbed by a surface with sharp edges. It source is any sharp edge object. Knife edge diffraction Model is used for diffraction. 1.6.3 Scattering Scattering occurs when an electromagnetic wave falls upon an object which has small dimension as compared to the wavelength of the wave. Scattering occurs due to small objects, rough surfaces or any irregularities. Objects such as lamp posts, trees scatter the radio waves. Radar Cross Section Model is used for sectoring. 1.7 Small Scale Fading Fading is the fluctuation in the received signal strength over very short distance. Fading is due to reception of different versions of same signals. Following are the factors which influence Small-Scale Fading are: Multipath propagation: Due to absence of LOS signal follows the multipath due to reflection, diffraction, scattering. Speed of the mobile: Fading also accurs due to the movement of the mobile as the signal strength changes. Speed of the surrounding objects: Fading also occurs due to the movement of mobile, if the speed of the surrounding object is much faster then the speed of the mobile then it also induces Doppler shift. The transmission BW (bandwidth) of the signal: The received signal is distorted if the transmitted signal bandwidth is greater than the bandwidth of the channel. 1.8 GSM The first GSM network was launched in 1991. The GSM network was structured hierarchically. It consists of one administrative region, which is assigned to MSC. Each administrative region is consists of at least one location area (LA). LA is also called the visited area. An LA consists of several cell groups. Each cell group is assigned to a base station controller (BSC). Cells of one BSC may belong to different LAs. GSM distinguishes explicitly between users and identifiers. The user identity associates with a MS by mans of personal chip cards, the subscriber identity module (SIM). The SIM is portable and transferable MSs. The mobile Roaming number is a temporary location-dependent ISDN number. It is assigned by a locally responsible Visited Location Number (VLR). The GSM network can defined into four major parts. Mobile station (MS). Base station Sub-system (BSS). Network and switching Sub-system (NSS). Operation and support Sub-system (OSS). 1.8.1 Mobile station A mobile station consists of two parts. Mobile equipment and terminal. Subscriber identity module (SIM). 1.8.2 THE Terminal There are different types of terminal distinguished principally by their power and application: The fixed terminals are installed in cars. The GSM portable terminals can be used in the vehicles. The hand held terminals have experienced a biggest success depending upon their weight and volume, which are decreasing continuously. These terminals can emit power of 2 w. The evolution of technologies decreases the maxpower to 0.8 watts. 1.8.3 SIM Sim is a smart card which identifies the terminal. Using the sim card in the mobile, the user can access all the services provided by the provider. Terminal does not operate without the sim,. Personal identification number(PIN) helps protect sim. 1.9 The Base Station Subsystem The BSS connects the MS to Network Switching Sub-system. It is incharge of transmission as well as reception. The BSS is further divided into two main parts. Base transceiver station (BTS) or base station. Base Station Controller(BSC). 1.9.1 The Base Transceiver Station The BTS deals with the transceivers and antennas which are used in each cell of a network. BTS is usually in the center of cell. Size of the cell is defined by its transmitting power. Each BTS has one to sixteen transceivers which depends upon the density of users. 1.10 The Base Station Controller The BSC controllers the group of BTS and manages radio resources. The BSC is incharge of handover, frequency hoping and exchange of radio frequency power level of BTSs. 1.11 The Network and Switching Subsystem It is to manage the communication between mobile and other users, such as ISDN users, telephony users. It store the information in data bases about the subscriber and manage their mobility. 1.12 The Mobile Services Switching Center (MSC) It is the central component of the NSS. Network Switching Functions are performed by the MSC. It provides connection to more other networks. Chapter 2 Planning One of the important phase of the project in which all the detail information is gathered about different areas and their population including city boundary, market analysis and roads are the key features in these details are city profiling. This phase is divided into different tasks. 2.1 Lahore City Map First is to get the detailed map of the Lahore city, which includes all the aspects related to the project. These are following:- Area division Dense area Sub-urban area open area Boundaries of City 2.2 Boundary Marking The project â€Å"Radio Frequency Planning † is basically the frequency planning of the city, not to its belongings areas. The exact boundary of the city is marked in order to concentrate on the marked area. 2.3 Population Population of the city plays an important role in the frequency planning. It helps a lot in the estimations and assumptions. The population of the city is around 10 million. 2.4 Estimations and Assumptions This part is mainly concerned with the frequency planning. When a new telecommunication company comes in the market, it estimates it users. This estimation is done with respect to the total population of the particular area. The estimations are done to estimate the users on urban, suburban and open areas. 2.5 Area Division The area division depends upon the percentage of population in an area and type of area as it is the important factor in the site as wall as frequency planning. The Lahore city is divided into three major areas. 2.5.1 Urban Area Urban area is an area which is surrounded by more density of humans and structures in comparison to the areas surrounding it 2.5.2 Sub-Urban Area Suburban area is districts located either inside a town or citys outer premises or just outside its limits. 2.5.3 Open Area Open area is partially settled places away from the large cities. Such areas are different from more intensively settled urban and suburban areas. There are less population as compared to urban and sub-urban areas. 2.6 Site Planning 2.6.1 Map of Lahore 2.6.2 Urban Area 2.6.3 Sub-Urban Area 2.6.4 Open Area HATA Model for Urban Area = Path loss in Urban Areas in decibel (dB) = Height of base station in meters (m) = Height of mobile station Antenna in meters (m) = Frequency of Transmission in megahertz (MHz). = Distance between the base station and mobile stations in kilometers To calculate radius of a site of Urban Area For Downlink =-75 dBm(this power covers both indoor and outdoor coverage range -70 to -90 dBm ) = 35 m(Average height of antenna in city is 30 to 200 m) = 1.5 m = 13 dBm = 46 dBm (Max Power transmitted by Base Station) = Cable loss = 2.01 dBm = 945 Mhz (Downlink frequency 935 to 960 MHz) = Combine Loss= 5.5 dBm Putting in HATA equation For Uplink = -102 dbm(Min Power received by Base Station) = 29.1 dBm (Max transmitted power mobile) = 900 MHz (890 to 915 MHz) Putting in HATA equation We will be using d=0.90 Km as it covers both Uplink and Downlink. For Sub-Urban Area For Downlink For downlink of Suburban parameters are same as for Urban. For Uplink Uplink parameters are also same as Urban Areas We will be using d=2.32 Km for Suburban Area. For Open Areas Downlink For downlink parameters are same as Urban Areas For Uplink We will be using d=8 for Open Areas. We will be using 65 degree directional Antennas. Angle between 2 consecutive lobes is 120 degree. r=Radius of lobes For Full Lobe For All 3 Lobes Area of site in Urban Area of site in Suburban Area of site in Fields(Open Area) Calculations for Number of BTS 2.7 Frequency Planning One of the breakthrough in solving the problem of congestion and user capacity is the cellular concept. Cellular radio systems rely on reuse of channels throughout a coverage region. A group of radio channels are allocated to each cellular base station to be used within a area known as cell. Different channels are assingned in the adjacent cells of the base station. The same group of channels can be used by limiting the coverage area, within the boundaries of a cell to cover different levels, within tolerable limits. Frequency planning is the design process of selecting, allocating or assinging channel group stations within a system. The theoretical calculations, and fixed size of a cell is assumed, that can differentiate no of channels in a cell and from that can differentiate cluster size and will differ, the capacity of the cellular system. There is a trade between the interference abd capacity in theoretical calculation as if we reduce the cluster size more cells are needed to cover the area and more capacity. But from another perceptive small cluster size causes the ratio between cell radius, and the distance between co-channels cells to increase, leading to stronger co-channels interference. In practical calculations, a fixed no of channels are allocated to a cell. One channel per lobe 3channels are allocated to a cell. The capacity can be increased by allocating 2 channels per lobe or 6 channels per cell. But after allocating channels once, they will remain fixed for the whole cellular system and frequency planning. Now as with the fixed no of channels as per cell, the capacity will remain constant of the system and we can achieve weaker co-channel interference, by having a small cluster size(N). A cluster size of 7 is selected in this project, which is also discussed. So in later practical world , there is not a trade-off between capacity and co-channel interference. 2.7.1 Calculations The city of Lahore is divided into 120 cells. We take 3 channels per cell that gives us 1 cell = 3 channels Reuse factor = 1/N = 1/7 Which means that frequency can be reused after a cluster of 7 cells. That gives us the total of 7 x 3 =21+ 2(guard cells)=23 channels We will be using 23 channels with a reuse factor of 1/7. 2.8 Implementation in GAIA Figure 2.1 is a snapshot of GAIA planning tool showing us the structure of an urban area. This figure illustrates the urban boundary which we calculate during city profiling. It also shows the antenna system used, in this case 3 sectors with 120 degree azimuth spacing is used. Antennas are installed on the rooftop of buildings or houses due to dense population and to provide a better coverage. Figure 2.2 shows us the planning of a Sub-Urban area with sites more distance apart as population is less, compared to urban. In Sub-Urban 3 sector cell is used which is similar to the ones used in Urban Figure 2.3 shows us the coverage planning of a network in an open area. Here the sites are further apart as open area has least population. 3 sector cell is used with the antennas installed above a steel structure for better coverage. Figure 2.4 shows the sector wise cell area of the sites in the urban area of the city in GAIA, which can be differentiated with the help of different color for each sector, also it shows the coverage area of every site. We have used grid approach in this planning, it is the most widely used and most effective technique used theoretically and practically. Figure 2.5 shows the cell boundary of sites in Sub-urban area of the city. Figure 2.6 shows the cell boundary in the open area of the city. Figure 2.7 illustrates the signal strength in the urban area of the city. Because of the dense population the signal power is strong throughout to ensure high quality calls to the subscribers with minimum interference and call drop. Figure 2.8 shows the 2G signal strength in the Sub-urban areas where population density is low and so the power required is less as compared to urban areas. Figure 2.9 shows the serving signal strength in open area. The signal is the weakest as there is the least number of people in open area. CHAPTER 3 FUNDAMENTALS OF 3G 3.1 INTRODUCTION The Universal Mobile Telephony System (UMTS) or 3G as it is known is the next big thing in the world of mobile telecommunications. It provides convergence between mobile telephony broadband access and Internet Protocol (IP) backbones. This introduces very variable data rates on the air interface, as well as the independence of the radio access infrastructure and the service platform. For users this makes available a wide spectrum of circuit-switched or packet data services through the newly developed high bit rate radio technology named Wideband Code Division Multiple Access (WCDMA). The variable bit rate and variety of traffic on the air interface have presented completely new possibilities for both operators and users, but also new challenges to network planning and optimization. The success of the technology lies in optimum utilization of resources by efficient planning of the network for maximum coverage, capacity and quality of service. This part of our project aims to detail method of UMTS Radio Network (UTRAN) Planning. The new technologies and services have brought vast changes within the network planning; the planning of a 3G network is now a complex balancing act between all the variables in order to achieve the optimal coverage, capacity and Quality of Service simultaneously. 3.2 WCDMA In UMTS access scheme is DS-CDMA (Direct Sequence CDMA) which involves that a code sequence is directly used to modulate the transmitted radio signal with information which is spreaded over approximately 5 MHz bandwidth and data rate up to 2 Mbps. Every user is assigned a separate code/s depending upon the transaction, thus separation is not based on frequency or time but on the basis of codes. The major advantage of using WCDMA is that there is no plan for frequency re-use. 3.3 NODE B Node B functions as a RBS (Radio Base Station) and provides radio coverage to a geographical area, by providing physical radio link between the UE (User Equipment) and the network. Node B also refer the codes that are important to identify channels in a WCDMA system. It contains the RF transceiver, combiner, network interface and system controller, timing card, channel card and backplane. The Main Functions of Node B are: Closed loop power control CDMA Physical Channel coding Modulation /Demodulation Micro Diversity Air interface Transmission /Reception Error handling Both FDD and TDD modes are supported by Single node B and it can be co-located with a GSM BTS to reduce implementation costs. The conversion of data from the Radio interface is the main task of Node B. It measures strength and quality of the connection. The Node B participates in power control and is also responsible for the FDD softer handover. On the basis of coverage, capacity and antenna arrangement Node B can be categorizes as Omni directional and Sectorial: OTSR (Omni Transmitter Sector Receiver) STSR (Sector Transmitter Sector Receiver) 3.3.1 OTSR (Omni Transmit Sector Receive) The OTSR configuration uses a single (PA) Power Amplifier, whose output is fed to a transmit splitter. The power of the RF signal is divided by three and fed to the duplexers of the three sectors, which are connected to sectorized antennas. 3.3.2 STSR (Sectorial Transmit Sector Receive) The STSR configuration uses three (PA) Power Amplifier, whose output is fed directly to the duplexers of the three sectors, which are connected to sectorized antennas. Node B serve the cells which depend on sectoring. 3.4 ACCESS MODES 3.4.1 FDD (Frequency Division Duplex) A duplex method whereby uplink and downlink transmissions use two separated radio frequencies. In the FDD, each downlink and uplink uses the different frequency band. 3.4.2 TDD (Time Division Duplex) It is a method in which same frequency is used for the transmission of downlink and uplink by using synchronized time intervals. Time slots are divided into transmission and reception part in the physical channel. 3.4.3 Frequency Bands 3.4 CELLULAR CONCEPT The UMTS network is third generation of cellular radio network which operate on the principle of dividing the coverage area into zones or cells (node B in this case), each of which has its own set of resources or transceivers (transmitters /receivers) to provide communication channels, which can be accessed by the users of the network. A cell is created by transmitting numerous number of low power transmitters. Cell size is determined by the different power levels according to the subscriber demand and density within a specific region. Cells can be added to accommodate growth. Communication in a cellular network is full duplex, which is attained by sending and receiving messages on two different frequencies. In order to increase the frequency reuse capability to promote spectrum efficiency of a system, it is desirable to reuse the same channel set in two cells which are close to each other as possible, however this increases the probability of co-channel interference . The performance of cellular mobile radio is affected by co channel interference. Co-channel interference, when not minimized, decreases the ratio of carrier to interference powers (C/I) at the periphery of cells, causing diminished system capacity, more frequent handoffs, and dropped calls. Usually cells are represented by a hexagonal cell structure, to demonstrate the concept, however, in practice the shape of cell is determined by the local topography. 3.4.1 Types of Cell The 3G network is divided on the basis of size of area covered. Micro cell the area of intermediate coverage, e.g., middle of a city. Pico cell the area of smallest coverage, e.g., a hot spot in airport or hotel. Macro cell the area of largest coverage, e.g., an complete city. 3.5 FADING Fading is another major constraint in wireless communication. All signals regardless of the medium used, lose strength this is known as attenuation/fading. There are three types of fading: Pathloss Shadowing Rayleigh Fading 3.5.1 Pathloss Pathloss occurs as the power of the signal steadily decreases over distance from the transmitter. 3.5.2 Shadowing Shadowing or Log normal Fading is causes by the presence of building, hills or even tree foilage. 3.5.3 Rayleigh Fading Rayleigh Fading or multipath fading is a sudden decrease in signal strength as a result of interference between direct and reflected signal reaching the mobile station. 3.6 HANDOVER IN CDMA The term handover or handoff refers to the process of transferring data session or an ongoing call from channel to channel connected to the core network to another. The handover is performed due to the mobility of a user that can be served in another cell more efficiently. Handover is necessary to support mobility of users. Handover are of following types (also known as handoff): Hard Handover Soft Handover Softer Handover 3.6.1Hard.Handover In Hard handover the old radio links in the UE are dispose of before the new radio links takes place. It can be either seamless or non-seamless. In seamless hard handover, the handover is not detected by the user. A handover that needs a change of the carrier frequency is a hard handover. 3.6.2Soft.Handover Soft handover takes place when cells on the same frequency are changed. Atleast one radio link is always kept to the UTRAN in the removal and addition of the radio links. It is opperated by means of macro diversity in which many radio links are active. 3.6.3Softer.handover It is one of the important case of soft handover which describe the removal and addition of the radio links which is being belonged by the same Node B. Macro diversity can be performed in the NODE B with maximum ratio combining in softer handover. There are inter-cell and intra-cell handover. Handover 3G 2G (e.g. handover to GSM) FDD inter-frequency hard handover TDD/FDD handover (change of cell) TDD/TDD handover FDD/TDD handover (chan Design and Planning of 2G, 3G and Channel Modelling of 4G Design and Planning of 2G, 3G and Channel Modelling of 4G Chapter 1 Fundamentals of Cellular Communication In this chapter, all the background knowledge which is required for this project has been discussed. 1.1 Cell The area covered by single BTS(base transceiver station) is known as cell. 1.1.1 Shape of cell The shape of cell depends upon the coverage of the base station. The actual coverage of the base station is called footprint and is found with the help of measurements from the field. We can make our calculations easier by using the shape of circle noting that there would not be spaces between them. As, the purpose is to provide coverage to each and every subscriber. But if there are spaces between the coverage areas then the person in that specific area will not be able to get any coverage. To cover the problem of interleaving spaces, the shapes that can be used theoretically are: Square Triangle Hexagon But in selection criteria one thing must be kept in mind that every person within a cell get same coverage specially the person at the edges of the cell. So hexagon is the shape among these three choices with largest coverage area. Its coverage area and shape is closest to the circle and it helps tessellate. Omnidirectional antenna is used in the center of it, and if we want to use sectored directional antenna then it must be used at any three corners of it. 1.1.2 Area of the Cell The area of a cell with radius R is shown in figure 1.1(a), is given by: 1.2 Frequency planning While developing the cellular system, it has limited capacity due to the given bandwidth. So, in order to solve this problem Cellular Systems have to depends on an intelligent and more use of channels through out the area. Every cellular base station is alloted a group of different radio channels to be used in a cell. Base station in the adjacent cells use completely different frequencies. For this purpose antennas are used such that their power may get limited within the cell. In this way the allocated frequencies maybe reused in different cells again. The process of allocating and selecting channel groups for all the base stations in a system is known as frequency reuse or frequency planning. We use two types of antennas: Omnidirectional antenna Sectored directional antenna Omnidirectional antennas are used in the cells which are centrally excited and sectored directional antennas are used in the edge excite cells. To understand the concept of frequency reuse, let us say that S are the total no. of duplex channels available for use, k number of channels given to each cell i.e. k S=kN (1.2) Where N is no. of cells which uses the complete set of available frequencies known as cluster frequency reuse factor (1.3) Each cell is in the cluster is assigned of the available channels. The radio frequency from 3Hz to 3000GHz are separated into 12 bands, as shown in the table. Frequency spectrum has different propagation characteristics. As far as concerned to the mobile communication, we only pay attention to the UHF spectrum. 1.2.1 Cluster size(N) If we use N large (a large cluster), the ratio of the cell radius and the distance between co-channel decreases, which causes weaker co-channel interference. But if N is smaller, by keeping the cell size same then we more clusters are needed to cover an area. Hence the capacity is increased. So if we use N larger then the quality of voice is good but the capacity is less and vice versa. 1.3 Interference Interference is one of the major factor in the capacity and performance of a cellular network. The interference is due to a call in the neighbouring cell, another base station operating in the same frequency. Interference causes crosstalk and noise. There are two types of interference. Adjacent channel interference Co-channel interference 1.3.1 Adjacent channel interference Adjacent channel interference results from the signals which are side by side in frequencies to the desires signal. Adjacent channel interference is caused by wrong filtering, like incomplete filtering of not wanted modulation in frequency modulation (FM) systems, not proper tuning, or poor control of frequency. It causes problem. Adjacent channel interference can be reduced by careful channel assignment, filtering and power control within a cell. 1.3.2 Co-channel interference Co-channel cells are the cell which use the same set of frequencies. For example, in the figure 1.2 all the letter ‘A are the co-channel cell because they use the same set of frequencies. Interference due to the co-channel cells is called co-channel interference. It can be reduced by using greater value of N(cluster size). If D is the distance between the co-channel cells and R is radius of the cell, then by using greater value of N the ratio between D to R is increased hence reducing co-channel interference. The relation can b written as: 1.4 Improving coverage and capacity The number of channels assigned to a cell became insufficiently as the demand of wireless system increases. To provide more channels per coverage, some techniques are introduced which improve the coverage and capacity. These techniques are: Cell splitting Sectoring Microcell zone concept 1.4.1 Cell Splitting Cell splitting is the process of dividing a cell into smaller cells. In this process we reduce the antenna height and power of the base station. Cell splitting increases the capacity by increasing frequency reuse factor. In cell splitting Channel assignment techniques remain the same. SIR remains the same Trunking inefficiency do not get suffer. Trunking efficiency is the measure of the number of users which can be offered a particular Grade of service with the specific configuration of the channels. The grade of service (GOS) is the measure of the ability to access a trunked system during the busy hours. The radius of the new cell is reduce to half. So power is also reduced. 1.4.2 Sectoring Sectoring uses directional antennas for controlling the interferences and frequency reuse of channels. The co-channel interference is reduced and thus increasing system performance by using directional antenna. A cell is normally divided into three 120 sectors or six 60 °sectors. When sectoring is used, the channels used in a particular cell are broken into sectored groups and are used only within a particular sector. The no. of channels get divided into sectored groups, so the trunking efficiency is reduced. In sectoring SIR is improved by reducing interference and trunking efficiency is reduced. Handoff increased in sectoring. The s/I improvement allows to decrease the cluster size N in order to improve the frequency reuse, and thus the system capacity. Further improvements in s/I is achieved by downtilting the sector antennas. 1.4.3 Microcell Zone Concept Microcell Zone concept distributes the coverage of a cell and extends the cell boundry to hard to reach places. It maintains the S/I and trunking efficiency, and increases the coverage and capacity of an area. 1.5 Radio wave propagation Radio waves propagate through different channels and by different ways to reach the MS(Mobile Station). It also depends upon the speed of the wave. The propagation of radio waves depends into two types: Large scale propagation Small scale propagation(Fading) 1.5.1 Large scale propagation The model predicts that the average signal strength for all transmitter-receiver (TR) distance on a scale known as large scale propogation model. 1.5.2 Small scale propagation The models that predicts the rapid fluctuation of the received signal strength over a short distance known as small scale propagation model or fading. 1.5.3 Free Space Propagation Model The free space propagation model is used when the transmitter and receiver have line of sight (LOS) between them to predict the received signal strength. Where Pr = received power. Pt = transmitted power, Gt and Gr = transmitter and receiver antenna gain, do= T-R separation, L = system loss factor ÃŽ » = wavelength. 1.6 Propagation Mechanisms The propagation mechanisms which effect propagation are: Reflection Scattering Diffraction Reach directly (in case of Line of Sight) If there is line of sight signal reach the Mobile station directly and signal power is very strong. 1.6.1 Reflection Reflection occurs when an electromagnetic wave falls upon an object which is large as compare to the wavelength of the wave. It occurs from buildings, walls, surface of earth etc. 1.6.2 Diffraction Diffraction happens when the path between the transmitters and receivers is disturbed by a surface with sharp edges. It source is any sharp edge object. Knife edge diffraction Model is used for diffraction. 1.6.3 Scattering Scattering occurs when an electromagnetic wave falls upon an object which has small dimension as compared to the wavelength of the wave. Scattering occurs due to small objects, rough surfaces or any irregularities. Objects such as lamp posts, trees scatter the radio waves. Radar Cross Section Model is used for sectoring. 1.7 Small Scale Fading Fading is the fluctuation in the received signal strength over very short distance. Fading is due to reception of different versions of same signals. Following are the factors which influence Small-Scale Fading are: Multipath propagation: Due to absence of LOS signal follows the multipath due to reflection, diffraction, scattering. Speed of the mobile: Fading also accurs due to the movement of the mobile as the signal strength changes. Speed of the surrounding objects: Fading also occurs due to the movement of mobile, if the speed of the surrounding object is much faster then the speed of the mobile then it also induces Doppler shift. The transmission BW (bandwidth) of the signal: The received signal is distorted if the transmitted signal bandwidth is greater than the bandwidth of the channel. 1.8 GSM The first GSM network was launched in 1991. The GSM network was structured hierarchically. It consists of one administrative region, which is assigned to MSC. Each administrative region is consists of at least one location area (LA). LA is also called the visited area. An LA consists of several cell groups. Each cell group is assigned to a base station controller (BSC). Cells of one BSC may belong to different LAs. GSM distinguishes explicitly between users and identifiers. The user identity associates with a MS by mans of personal chip cards, the subscriber identity module (SIM). The SIM is portable and transferable MSs. The mobile Roaming number is a temporary location-dependent ISDN number. It is assigned by a locally responsible Visited Location Number (VLR). The GSM network can defined into four major parts. Mobile station (MS). Base station Sub-system (BSS). Network and switching Sub-system (NSS). Operation and support Sub-system (OSS). 1.8.1 Mobile station A mobile station consists of two parts. Mobile equipment and terminal. Subscriber identity module (SIM). 1.8.2 THE Terminal There are different types of terminal distinguished principally by their power and application: The fixed terminals are installed in cars. The GSM portable terminals can be used in the vehicles. The hand held terminals have experienced a biggest success depending upon their weight and volume, which are decreasing continuously. These terminals can emit power of 2 w. The evolution of technologies decreases the maxpower to 0.8 watts. 1.8.3 SIM Sim is a smart card which identifies the terminal. Using the sim card in the mobile, the user can access all the services provided by the provider. Terminal does not operate without the sim,. Personal identification number(PIN) helps protect sim. 1.9 The Base Station Subsystem The BSS connects the MS to Network Switching Sub-system. It is incharge of transmission as well as reception. The BSS is further divided into two main parts. Base transceiver station (BTS) or base station. Base Station Controller(BSC). 1.9.1 The Base Transceiver Station The BTS deals with the transceivers and antennas which are used in each cell of a network. BTS is usually in the center of cell. Size of the cell is defined by its transmitting power. Each BTS has one to sixteen transceivers which depends upon the density of users. 1.10 The Base Station Controller The BSC controllers the group of BTS and manages radio resources. The BSC is incharge of handover, frequency hoping and exchange of radio frequency power level of BTSs. 1.11 The Network and Switching Subsystem It is to manage the communication between mobile and other users, such as ISDN users, telephony users. It store the information in data bases about the subscriber and manage their mobility. 1.12 The Mobile Services Switching Center (MSC) It is the central component of the NSS. Network Switching Functions are performed by the MSC. It provides connection to more other networks. Chapter 2 Planning One of the important phase of the project in which all the detail information is gathered about different areas and their population including city boundary, market analysis and roads are the key features in these details are city profiling. This phase is divided into different tasks. 2.1 Lahore City Map First is to get the detailed map of the Lahore city, which includes all the aspects related to the project. These are following:- Area division Dense area Sub-urban area open area Boundaries of City 2.2 Boundary Marking The project â€Å"Radio Frequency Planning † is basically the frequency planning of the city, not to its belongings areas. The exact boundary of the city is marked in order to concentrate on the marked area. 2.3 Population Population of the city plays an important role in the frequency planning. It helps a lot in the estimations and assumptions. The population of the city is around 10 million. 2.4 Estimations and Assumptions This part is mainly concerned with the frequency planning. When a new telecommunication company comes in the market, it estimates it users. This estimation is done with respect to the total population of the particular area. The estimations are done to estimate the users on urban, suburban and open areas. 2.5 Area Division The area division depends upon the percentage of population in an area and type of area as it is the important factor in the site as wall as frequency planning. The Lahore city is divided into three major areas. 2.5.1 Urban Area Urban area is an area which is surrounded by more density of humans and structures in comparison to the areas surrounding it 2.5.2 Sub-Urban Area Suburban area is districts located either inside a town or citys outer premises or just outside its limits. 2.5.3 Open Area Open area is partially settled places away from the large cities. Such areas are different from more intensively settled urban and suburban areas. There are less population as compared to urban and sub-urban areas. 2.6 Site Planning 2.6.1 Map of Lahore 2.6.2 Urban Area 2.6.3 Sub-Urban Area 2.6.4 Open Area HATA Model for Urban Area = Path loss in Urban Areas in decibel (dB) = Height of base station in meters (m) = Height of mobile station Antenna in meters (m) = Frequency of Transmission in megahertz (MHz). = Distance between the base station and mobile stations in kilometers To calculate radius of a site of Urban Area For Downlink =-75 dBm(this power covers both indoor and outdoor coverage range -70 to -90 dBm ) = 35 m(Average height of antenna in city is 30 to 200 m) = 1.5 m = 13 dBm = 46 dBm (Max Power transmitted by Base Station) = Cable loss = 2.01 dBm = 945 Mhz (Downlink frequency 935 to 960 MHz) = Combine Loss= 5.5 dBm Putting in HATA equation For Uplink = -102 dbm(Min Power received by Base Station) = 29.1 dBm (Max transmitted power mobile) = 900 MHz (890 to 915 MHz) Putting in HATA equation We will be using d=0.90 Km as it covers both Uplink and Downlink. For Sub-Urban Area For Downlink For downlink of Suburban parameters are same as for Urban. For Uplink Uplink parameters are also same as Urban Areas We will be using d=2.32 Km for Suburban Area. For Open Areas Downlink For downlink parameters are same as Urban Areas For Uplink We will be using d=8 for Open Areas. We will be using 65 degree directional Antennas. Angle between 2 consecutive lobes is 120 degree. r=Radius of lobes For Full Lobe For All 3 Lobes Area of site in Urban Area of site in Suburban Area of site in Fields(Open Area) Calculations for Number of BTS 2.7 Frequency Planning One of the breakthrough in solving the problem of congestion and user capacity is the cellular concept. Cellular radio systems rely on reuse of channels throughout a coverage region. A group of radio channels are allocated to each cellular base station to be used within a area known as cell. Different channels are assingned in the adjacent cells of the base station. The same group of channels can be used by limiting the coverage area, within the boundaries of a cell to cover different levels, within tolerable limits. Frequency planning is the design process of selecting, allocating or assinging channel group stations within a system. The theoretical calculations, and fixed size of a cell is assumed, that can differentiate no of channels in a cell and from that can differentiate cluster size and will differ, the capacity of the cellular system. There is a trade between the interference abd capacity in theoretical calculation as if we reduce the cluster size more cells are needed to cover the area and more capacity. But from another perceptive small cluster size causes the ratio between cell radius, and the distance between co-channels cells to increase, leading to stronger co-channels interference. In practical calculations, a fixed no of channels are allocated to a cell. One channel per lobe 3channels are allocated to a cell. The capacity can be increased by allocating 2 channels per lobe or 6 channels per cell. But after allocating channels once, they will remain fixed for the whole cellular system and frequency planning. Now as with the fixed no of channels as per cell, the capacity will remain constant of the system and we can achieve weaker co-channel interference, by having a small cluster size(N). A cluster size of 7 is selected in this project, which is also discussed. So in later practical world , there is not a trade-off between capacity and co-channel interference. 2.7.1 Calculations The city of Lahore is divided into 120 cells. We take 3 channels per cell that gives us 1 cell = 3 channels Reuse factor = 1/N = 1/7 Which means that frequency can be reused after a cluster of 7 cells. That gives us the total of 7 x 3 =21+ 2(guard cells)=23 channels We will be using 23 channels with a reuse factor of 1/7. 2.8 Implementation in GAIA Figure 2.1 is a snapshot of GAIA planning tool showing us the structure of an urban area. This figure illustrates the urban boundary which we calculate during city profiling. It also shows the antenna system used, in this case 3 sectors with 120 degree azimuth spacing is used. Antennas are installed on the rooftop of buildings or houses due to dense population and to provide a better coverage. Figure 2.2 shows us the planning of a Sub-Urban area with sites more distance apart as population is less, compared to urban. In Sub-Urban 3 sector cell is used which is similar to the ones used in Urban Figure 2.3 shows us the coverage planning of a network in an open area. Here the sites are further apart as open area has least population. 3 sector cell is used with the antennas installed above a steel structure for better coverage. Figure 2.4 shows the sector wise cell area of the sites in the urban area of the city in GAIA, which can be differentiated with the help of different color for each sector, also it shows the coverage area of every site. We have used grid approach in this planning, it is the most widely used and most effective technique used theoretically and practically. Figure 2.5 shows the cell boundary of sites in Sub-urban area of the city. Figure 2.6 shows the cell boundary in the open area of the city. Figure 2.7 illustrates the signal strength in the urban area of the city. Because of the dense population the signal power is strong throughout to ensure high quality calls to the subscribers with minimum interference and call drop. Figure 2.8 shows the 2G signal strength in the Sub-urban areas where population density is low and so the power required is less as compared to urban areas. Figure 2.9 shows the serving signal strength in open area. The signal is the weakest as there is the least number of people in open area. CHAPTER 3 FUNDAMENTALS OF 3G 3.1 INTRODUCTION The Universal Mobile Telephony System (UMTS) or 3G as it is known is the next big thing in the world of mobile telecommunications. It provides convergence between mobile telephony broadband access and Internet Protocol (IP) backbones. This introduces very variable data rates on the air interface, as well as the independence of the radio access infrastructure and the service platform. For users this makes available a wide spectrum of circuit-switched or packet data services through the newly developed high bit rate radio technology named Wideband Code Division Multiple Access (WCDMA). The variable bit rate and variety of traffic on the air interface have presented completely new possibilities for both operators and users, but also new challenges to network planning and optimization. The success of the technology lies in optimum utilization of resources by efficient planning of the network for maximum coverage, capacity and quality of service. This part of our project aims to detail method of UMTS Radio Network (UTRAN) Planning. The new technologies and services have brought vast changes within the network planning; the planning of a 3G network is now a complex balancing act between all the variables in order to achieve the optimal coverage, capacity and Quality of Service simultaneously. 3.2 WCDMA In UMTS access scheme is DS-CDMA (Direct Sequence CDMA) which involves that a code sequence is directly used to modulate the transmitted radio signal with information which is spreaded over approximately 5 MHz bandwidth and data rate up to 2 Mbps. Every user is assigned a separate code/s depending upon the transaction, thus separation is not based on frequency or time but on the basis of codes. The major advantage of using WCDMA is that there is no plan for frequency re-use. 3.3 NODE B Node B functions as a RBS (Radio Base Station) and provides radio coverage to a geographical area, by providing physical radio link between the UE (User Equipment) and the network. Node B also refer the codes that are important to identify channels in a WCDMA system. It contains the RF transceiver, combiner, network interface and system controller, timing card, channel card and backplane. The Main Functions of Node B are: Closed loop power control CDMA Physical Channel coding Modulation /Demodulation Micro Diversity Air interface Transmission /Reception Error handling Both FDD and TDD modes are supported by Single node B and it can be co-located with a GSM BTS to reduce implementation costs. The conversion of data from the Radio interface is the main task of Node B. It measures strength and quality of the connection. The Node B participates in power control and is also responsible for the FDD softer handover. On the basis of coverage, capacity and antenna arrangement Node B can be categorizes as Omni directional and Sectorial: OTSR (Omni Transmitter Sector Receiver) STSR (Sector Transmitter Sector Receiver) 3.3.1 OTSR (Omni Transmit Sector Receive) The OTSR configuration uses a single (PA) Power Amplifier, whose output is fed to a transmit splitter. The power of the RF signal is divided by three and fed to the duplexers of the three sectors, which are connected to sectorized antennas. 3.3.2 STSR (Sectorial Transmit Sector Receive) The STSR configuration uses three (PA) Power Amplifier, whose output is fed directly to the duplexers of the three sectors, which are connected to sectorized antennas. Node B serve the cells which depend on sectoring. 3.4 ACCESS MODES 3.4.1 FDD (Frequency Division Duplex) A duplex method whereby uplink and downlink transmissions use two separated radio frequencies. In the FDD, each downlink and uplink uses the different frequency band. 3.4.2 TDD (Time Division Duplex) It is a method in which same frequency is used for the transmission of downlink and uplink by using synchronized time intervals. Time slots are divided into transmission and reception part in the physical channel. 3.4.3 Frequency Bands 3.4 CELLULAR CONCEPT The UMTS network is third generation of cellular radio network which operate on the principle of dividing the coverage area into zones or cells (node B in this case), each of which has its own set of resources or transceivers (transmitters /receivers) to provide communication channels, which can be accessed by the users of the network. A cell is created by transmitting numerous number of low power transmitters. Cell size is determined by the different power levels according to the subscriber demand and density within a specific region. Cells can be added to accommodate growth. Communication in a cellular network is full duplex, which is attained by sending and receiving messages on two different frequencies. In order to increase the frequency reuse capability to promote spectrum efficiency of a system, it is desirable to reuse the same channel set in two cells which are close to each other as possible, however this increases the probability of co-channel interference . The performance of cellular mobile radio is affected by co channel interference. Co-channel interference, when not minimized, decreases the ratio of carrier to interference powers (C/I) at the periphery of cells, causing diminished system capacity, more frequent handoffs, and dropped calls. Usually cells are represented by a hexagonal cell structure, to demonstrate the concept, however, in practice the shape of cell is determined by the local topography. 3.4.1 Types of Cell The 3G network is divided on the basis of size of area covered. Micro cell the area of intermediate coverage, e.g., middle of a city. Pico cell the area of smallest coverage, e.g., a hot spot in airport or hotel. Macro cell the area of largest coverage, e.g., an complete city. 3.5 FADING Fading is another major constraint in wireless communication. All signals regardless of the medium used, lose strength this is known as attenuation/fading. There are three types of fading: Pathloss Shadowing Rayleigh Fading 3.5.1 Pathloss Pathloss occurs as the power of the signal steadily decreases over distance from the transmitter. 3.5.2 Shadowing Shadowing or Log normal Fading is causes by the presence of building, hills or even tree foilage. 3.5.3 Rayleigh Fading Rayleigh Fading or multipath fading is a sudden decrease in signal strength as a result of interference between direct and reflected signal reaching the mobile station. 3.6 HANDOVER IN CDMA The term handover or handoff refers to the process of transferring data session or an ongoing call from channel to channel connected to the core network to another. The handover is performed due to the mobility of a user that can be served in another cell more efficiently. Handover is necessary to support mobility of users. Handover are of following types (also known as handoff): Hard Handover Soft Handover Softer Handover 3.6.1Hard.Handover In Hard handover the old radio links in the UE are dispose of before the new radio links takes place. It can be either seamless or non-seamless. In seamless hard handover, the handover is not detected by the user. A handover that needs a change of the carrier frequency is a hard handover. 3.6.2Soft.Handover Soft handover takes place when cells on the same frequency are changed. Atleast one radio link is always kept to the UTRAN in the removal and addition of the radio links. It is opperated by means of macro diversity in which many radio links are active. 3.6.3Softer.handover It is one of the important case of soft handover which describe the removal and addition of the radio links which is being belonged by the same Node B. Macro diversity can be performed in the NODE B with maximum ratio combining in softer handover. There are inter-cell and intra-cell handover. Handover 3G 2G (e.g. handover to GSM) FDD inter-frequency hard handover TDD/FDD handover (change of cell) TDD/TDD handover FDD/TDD handover (chan

The Space Race: USA vs USSR Essay -- The Space Race

The Space Race was a war of firsts between the United States of America and the Union Soviet Socialist Republics. But it was also the culmination of the dreams of man for many millennia and the team who worked on the space programs were able to discover what so many of the people that came before and after them could only dream of. It was an endeavor that all of humanity was invested in at the time. It was a testament to the power of the human spirit and it showed how nothing was impossible if we persevered and strived to be better. The space race did not start as one would expect with the respective American and Soviet space agencies. But rather it began with the German V2 missile launches towards the end of World War 2. The V2 missile was designed by Wernher Von Braun a German scientist who had dreamed of traveling to the moon for many years; however this dream had to be secret as it was considered to be treasonous and not helpful to the German cause. Von Braun and many other amateur rocketeers were drafted into the German war machine in order to help build a super weapon and their base was Peenemà ¼nde. When the war was nearing its end the Third Reich unleashed its secret weapon, the V2 missile. It could hit anywhere within its target range and there would be no warning. When it hit, it caused scenes of mass destruction. The V2 missiles were to be Hitler’s ace in the hole. However by then it was far too late the war had already been lost with Soviets advancing from the East and the other Allies from t he west and when the Allies discovered the German’s V2 missile they knew that they would have to have it as it was decades further than what they had on their own. So when truce was declared it was a race between the Americans and... ...on/timeline/timeline2.html>. "PGM-19 Jupiter." Wikipedia. Wikimedia Foundation, 04 Dec. 2014. Web. 13 Apr. 2014. "Redstone (rocket Family)." Wikipedia. Wikimedia Foundation, 30 Mar. 2014. Web. 13 Apr. 2014. "The Space Race." History.com. A&E Television Networks, n.d. Web. 13 Apr. 2014. . "Space Race." Wikipedia. Wikimedia Foundation, 04 Oct. 2014. Web. 13 Apr. 2014. . "TheSpaceRace.com - Timeline of Space Exploration." TheSpaceRace.com - Timeline of Space Exploration. N.p., n.d. Web. 12 Apr. 2014. . "Voskhod Programme." Wikipedia. Wikimedia Foundation, 04 Nov. 2014. Web. 13 Apr. 2014. . "Waging Peace." : Cold War: The Space Race and Its' Significance. N.p., n.d. Web. 13 Apr. 2014.