
Tuesday, November 10, 2009
Hypertext

Internet Writing and Hypertext
“The key to Internet writing for me is visual, not verbal. Ever since computer operating systems progressed from half-mathematical ASCII to today’s lively, colorful, high-resolution graphics HTML format, the Internet has become a mercurial hybrid of word, image, and sound.”
Although Paglia’s format of writing can be more visually appealing, it can still be difficult to capture the attention of the reader. I always see myself reluctant to read long articles online and I’d rather print them. In some ways, there is a connection that you gain with the print version that doesn’t exist while reading online. I don’t see myself purchasing a kindle version of a book anytime soon.
However, in chapter 17 Gibson makes some interesting argument. Gibson states:
“All the qualities of hypertext encourage vastly different habits of thought than does traditional print. Hypertext has been called a democratizing medium because it allows everyone access to both production and decoding. This may be said of it both internally and within its larger environment. Internally, for example, hypertext is able to show clearly interconnectedness between ideas by linking them together. Although this is not completely impossible in print, it is structurally difficult to include massive amounts of material in a single text. “
I have to agree that hypertext can create a broader reach of ideas and can be used to search more efficiently for whatever is relevant to the reader. However, it is hard to fathom the traditional textbook in the classroom not existing because of hypertext. Gibson also suggests that a shift from traditional print textbooks to hypertext will inevitably take place in the classroom. The interactivity of hypertext and its ability to create a visually and increasingly informative environment will be an integral part of education, but I don't think it will eliminate or drastically decrease the use of textbooks.
Hypertext

The uses for hypertext are endless. The World Wide Web combines computer networking (the Internet) and Hypertext MarkUp Language (HTML) into an easy to use system by which people can access information around the world from a desktop computer. Hypertext is the medium used to transmit the information in a non-linear fashion via computer by clicking on a "link" using a mouse.

Hypertext
Textbooks vs. Hypertext
Monday, November 9, 2009
Hypertext Hierarchies?
The internet, according to Gibson, has "no hierarchy of ideas as is evidenced in a table of contents or outline" (284). By giving the reader to choose the direction that he wishes to continue in, the reader is able to learn in the manner that best suits him. I find myself having a tough time with a solid, rigid structure so the internet's ability to help the reader maneuver through the material relevant to him is great. There is no overarching structure to the internet; it is strictly organized "not in order of importance, calling into question not only hierarchies of ideas, but the notion of prerequisites" (284). It is this "choose your ending" style that gives the internet the power it has to convey information to a reader.
Is It So Wrong To Use Electronic?
“College students, even in the Ivy Leagues, may spend from 2 to 5 hours a night on the internet….Today’s college students were born in the 1980’s, when newspapers, a major melting-pot medium for a century since the start of immigration era, had already lost ground to television"
I personally do not know how I should take that statement. On the one hand, yes, it is true. I know I speak for most of us when I say that we spend a great deal of time online. Most of us depend on the Internet for our information; anything from news to emails to file transfers to this blog. So although we’ve been cited for spending so much time online, my question is, is it so wrong?
I know that on a day to day basis, I use my computer for just about all of my written communication. I check my email, I write to friends, I go on my favorite gossip blogs; I even go as far as bringing my computer to class to type out my notes such that I have all my information in neat, typed form. However, Pagila seems to hold it against us that we no longer (typically) turn to newspapers for our first source of information. I understand that newspapers may seem tradition; however, why should we hold ourselves back when it comes to receiving information? I like reading my newspaper every now and then, but I turn to the easiest source of information; electronic.
The Textual Convo
When you are having an Instant Message conversation with someone over gchat, facebook or AIM there is a synchronous interaction happening. When you are reading an email thread or a discussion on a message board you are reading a asynchronous interaction. However when you read an IM and you read a discussion thread, what is the difference besides waiting for the instant reply from the other person? After you complete the IM conversation with with someone, you can go back and read the conversation as if it is happening instantly again. There is a "sense of immediacy," as Strate points out, when you read a discussion, whether synchronous or asynchronous, and the reader can't help but to feel that the conversation is happening instantanously when the reality is that it could have happened hours, days or weeks a part.
This is sort of related to an implied textual emotion. Those who text, IM and leave facebook wall posts know that a different connotation can be applied to any blurb of text and by adding symbols like "!!!!" or ":)" and can make all the difference. Sure, text is text and a word is a word, but when you add these symbols to your online writing, you create a textual personality for yourself almost to the point of others being able to sense if a person is not who they say they are on the other side based on the textual emotion being exuded.
The Effects of Hypertext
If teachers introduce hypertext into their classroom it takes away from their control. Let's say a teacher uses a computer program which students use to help them learn. What is the teachers role now? It is simply a director, someone who guides the learning process instead of being an active member of giving the material to be learned. Students can wonder on these programs and gather information the teacher may not be ready to discuss yet or may not be necessary. If a student has a question about something they haven't gone over, that teacher must then be ready for everything which takes away from the organization and control of the class.
Friday, November 6, 2009
Effects of the Internet
The Internet has allowed for a new basis of which we socialize (facebook) and retrieve information (wikipedia.) It is now possible to reach anyone anywhere in the world and to retrieve facts in only seconds. Is this convenience making our generation more intelligent or more lazy? Studies have shown that the areas of the brain which control decision making and complex reasoning double in activity among new internet users. However, internet users show a decrease in their capacity to concentrate on given tasks. Using the internet may be rewiring our neuron connections. Paglia raises a very thought provoking point when he states "It will take another 30 years before the internet's effects are clearly understood." It seems that everyday interent use is reaching a new pinnacle. How will internet use effect the behavior and evolution of humans in the future? As I look at my 2 year old nephew unwittingly pressing on the keyboard, I wonder how the use of computers from such an early age will effect his cognitive development. In other words, is his mind at advantage or disadvantage by being entertained by interenet sites. Internet use has become so prevalent that it may be taking away from people's social skills as they spend hours on end in front of a computer, they may be losing out on critical life experiences.
Tuesday, November 3, 2009
The Key to The Keyboard
“…the convention of upper and lower case letters, a visual and spatial distinction devised for pint, becomes a means for indicating loudness. Similarly, the emoticon converts the finite alphanumeric keyboard into a source of nearly movable types…”
I thought this particular paragraph to be interesting in regards to the future of literacy. When we are talking with friends online or through email, we tend (or at least I, myself, find) that we become lazy. Instead of “you” it become “u”, if we’re happy, we tend to write :-) to convey emotion, and we even go so far to stop capitalizing “i”, simply because the computer will convert it for us.
But how soon will it be that we’ve translated the way that we write to our friends into the way that we write formally? With all the different ways in which we use the keyboard to convey our emotions and feelings, as stated by Lee, what’s to stop us from starting to use those methods of typing in a formal setting? We have a keyboard with vast options to convey our messages. For example, iF I typed LiKe ThIs, not only would you probably want to smash my keyboard, but you also might think that I am a 12 year old girl writing online for the first time. IF I STARTED TO TYPE LIKE THIS, you might think that I was angry at the fact that I have to continue typing. if i just simply typed like this n didnt care if i was riting formally or not, u mite think i was just talking to a friend.
Our keyboards help us to convey a message, but how does that message “convey” us? And how much longer will it be that we use these different ways of typing before they all blur together into one, non-formal, way of communication?
Online Education Unbound
However, sources such as geteducated.com as committed themselves to “rate, rank & compare online schools & degrees.” With such information available, people have been more inclined to get an online education without having to fear the many scams that are out there. In addition, traditional top tier schools such as Boston University, Penn State University and many others are now offering online degree programs. As people begin to see online education as a viable and increasingly more efficient way of receiving a degree, it may become a vital part of our educational endeavors.
In addition, here is a video of CNN reporting on online education:
Online Education
Education and Virtual Reality
The "Virtual Intern"
Why Online Education?
VR's Return to Plato's Cave
In VR, the person is able to escape to another world - one without any sort of physical repercussions. For example, in flight simulators if the pilot crashes, there aren't any actual physical repercussions. He/she is able to learn without actually experiencing harm. It is as if they are exposed to the light Plato discusses without actually having to change their lifestyle. I found this comparison to be most interesting when thinking about games like The Sims or Second Life. In these games, the player is actually able to simulate a family or simply create an avatar that represents who that player is/wants to be. Like Zettl says, these players have "a yearning for not being held accountable for our decisions" (108). The player is able to create a family, be responsible for day to day life, and interact with people without any true physical contact. It truly is the modern day "cave."
The following YouTube video shows the interesting capabilities of Second Life. Intro. Comm. Professor Levinson discussed this during one of our classes. He actually conducted a reading of a section of one of his books via avatar in Second Life. I had never heard of it before, but it was an interesting/extremely modern way to deliver a speech. Enjoy:
Hypertwitter
Hypertext is "any program that allows readers to navigate nonlinearly through a body of text, sometimes a single text, but frequently a database of related materials with hundreds of nodes of text linked together forming a network of relevant material, it may be considered a hypertext. Hypertext is text that exists only in cyberspace. It is impossible to put hypertext into traditional page-bound print; doing so would so radically alter its nature that it would simply no longer be hypertext (Gibson)."In many ways, linking Hypertext is a creative process. For example, while reading an educational passage about the history of the printing press, one might see that the words "...first printed book..." are a link, and when clicked, bring the reader to an image of the book. This type of interactive reading does not just happen by coincidence, rather it is thoughtfully created by the author to enhance what would be just a typical sequence of text. It is interesting to examine how facebook and twitter utilize hypertext. To me, the stand out usage would be the ability to click on specific interests, music, books and movies that your friends list out in their "Info" section. If you see someone likes the movie Atonement, you can click the word and then be directed to everyone else on facebook who lists Atonement as one of their favorite movies. This is really the operating principle of social networking; linking people together by common interests.

Twitter is really just a collaborative network of hypertext. Those who claim that Twitter is "just status updates" really have no idea what it is all about. People who take full advantage of Twitter are those who post viral video and real-time photos, links to websites, maps of their current location and use hash tags to start trending topics. It has gotten to the point where I personally don't tweet anything without some form of the aforementioned links in my update. And how cool is that? If someone walks by a major event in New York City and takes a picture of that and instantly tweets about it, it could possibly be re-tweeted over and over again to a point where thousands or even millions of people have now seen this image...perhaps an hour before it hits the 5 o'clock news or online news site.
Monday, November 2, 2009
Virtual Reality and Physical Rehabilitation
There are numerous strengths underlying the use of VR with rehabilitation [11,12]. Among these are that VR provides the opportunity for ecological validity, stimulus control and consistency, real-time performance feedback, independent practice, stimulus and response modifications that are contingent on a user's physical abilities, a safe testing and training environment, the opportunity for graduated exposure to stimuli, the ability to distract or augment the performer's attention, and perhaps most important to therapeutic intervention, motivation for the performer.
It's plain to see that the benefits of VR in rehabilitation are great and would allow rehabilitation practitioners to accurately measure a patients progress. Not only is this a form of virtual communication, but most importantly the practitioner would receiver a large amount of data feedback. If interested here is a link to the article:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC546404/
Virtual Reality in Education or Professions
Tuesday, October 27, 2009
Virtual World
This scenario reminds me of an emerging virtual world named Second Life. Second Life is a virtual world developed by Linden Lab and was launched in 2003. The purpose of Second Life is to create a virtual avatar that will enable a person to free themselves from their personal world. According to Second Life, the virtual world is a “place to connect, a place to shop, a place to work, a place to love, a place to explore, a place to be different, be yourself, free yourself, free your mind, change your mind, change your look, love your look, and love your life.” Second Life is a perfect example of using the virtual world as a way of escaping one’s environment. The virtual character liberates the users from reprisals and allows the users to say and do things that they might not have.
The Immoral world of Virtual Reality
I think that it is an important when dealing with virtual reality to speak about the morality of what goes on. Is mutilating and killing someone in a virtual world an okay thing to do because you arent physically harming someone? Or does this ability to commit virtual crimes foster the ability for one to commit these crimes in the physical world? Should there be regulations for committing especially heinous crimes in virtual reality? Many questions like these are being dealt with today, but who knows if a concrete conclusion will ever come, due to the broadness and unpredictability of the cyberworld.
Welcome to Cyberspace
I like these pictures because they create words that essentially come to mind when we think cyberspace. The vast communication patterns that can be achieved in cyberspace are represented above, while below represents the matrix of virtual infrastructure.The Point to PowerPoint?
“Electronic technology offers two distinct sets of tools for presentation and representation: tools for writing, and tools for visualization and sensory presentation. The computer and attendant technologies call forth both a new writing space and new perceptual space. Each of these new spaces in turn fosters a different construction of self” (130).
I found this section to be particularly through provoking when applied to the ideals behind the creation of Microsoft Office. Most, if not all of us, use Microsoft Office. Office comes with such programs as Word, PowerPoint, and Excel. However, when creating either a word document, a chart, or a PowerPoint, we are creating a way to communicate with others. But, though these ways of communication, we are able to personalize the overall appearance, which can change the overall message.
Think about it: if you are shown a PowerPoint presentation in class, which one are you more likely to pay attention to? The presentation that is in purely black and white, Time New Roman, or the presentation with slide designs, fancy fonts and appealing transitions? The way that we “design” and personalize our message can change the overall impact it has on our audiences.
There are numerous ways we use technologies to help define ourselves. Just from reading this post, can you guess my favorite color?
Military and Cyberspace
"ON OCTOBER 1, just beyond the Beltway inside Fort Meade, a four-star general became the first head of America’s new Cyber Command. Subordinate to General Keith Alexander are the Tenth Fleet and the Twenty-Fourth Air Force. The fleet has no ships, and the air-force unit has neither aircraft nor missiles. Their weapons are ones and zeroes. Their battlefield is cyberspace.
The mission of Cyber Command is to protect the U.S. military’s networks and to be ready to launch offensive cyber attacks on a potential enemy. Those offensive cyber attacks have the potential to reach out from cyberspace into the physical dimension, causing giant electrical generators to shred themselves, trains to derail, high-tension power-transmission lines to burn, gas pipelines to explode, aircraft to crash, weapons to malfunction, funds to disappear and enemy units to walk into ambushes. Welcome to warfare in the twenty-first century."
This is the full article http://www.nationalinterest.org/Article.aspx?id=22340
Virtual Reality Simulators

Flaming and Cyberspace
These flames are found all over the internet on blogs, discussion boards, emails, chat rooms, and IMs. When I used to go into chat rooms and talk more frequently online, I would constantly see these flames posted everywhere. Over the internet, people can put on a mask that they would not usually wear. People have a confidence when not put face to face with a person; they say things they would usually not. Flames turned into the newer phenomenon of "cyberbullying." Parents now are encouraged to monitor their children's interaction over the internet not only for questionable websites, but also for bullying. There is a lot of information on the web about this subject, but I found this video to be interesting:
THE PHILOSOPHICAL REALM
Cyberspace, Motion & The Self
Monday, October 26, 2009
The Virutal Classroom
"Imagine a classroom equally available to anyone, anywhere in the world--or, for that matter, off of the world--with a personal computer and connection to a phone system. Think of a classroom whose discussions, proceeding asynchronously, went on continuously, 24 hours a day, with no absolute limitation on how many people could participate at any one time. And picture yourself with access to a library comprised of papers that could be read by thousands of people, all at once, and yet these texts would still be there for you whenever you wished (p. 216)."Our Intro to New Media class is a genuine testament to this statement. By use of social media and social networking (blogging, Google groups, YouTube, etc.), every student in the class has resources available to them at any hour of the day and can instantly read and comment what other students have written, by means of our blog. However, the class blog is not limited to only students in our class. Thousands of people (hypothetically speaking...) can read our blog, question our thoughts, use an entry as a source for their own means, and even comment on our work. This type of interactive learning could never have been achieved without a "virtual classroom" or the boom of social networking/social media over the past few years. Although the blog has only been subject to comments and interaction from class-members, for now, the basic principle behind this type of interactive, digital learning environment is still exemplified. Discussion can potentially go on 24 hours a day and there is literally no limit to the amount of people who participate or add to it.
Communication and Cyberspace also brings up the advantage of earning a degree online. The idea of earning college credits online surfaced with the New York Institute of Technology, offering a few online courses for a modest tuition, in the mid 1980s and only flourished from then on. "The process of online education works like email, except rather than one person communication to another or a group of people, many people communicate to many, with the website or external computer system playing the crucial role of keeping track of who in the group has read who else's messages (p. 217-18)." The important component of learning, usually lacking from the traditional classroom setting, is students interactively learning from other students. One of the major advantages of online learning is the ability to actually learn from what other students have read in an interactive way. In a traditional classroom, professors tend to "inject or spoonfeed information into passive student minds (p. 222)."
Although there are downsides to virtual learning, the advantages prove to trump them. Learning by means of a digital medium opens up vast amounts of opportunity for those with time constraints, computer or internet based classes, or the desire to gain a degree while working full time. As explained before, even a traditional class setting can benefit from putting an aspect of the course material online, in an interactive format.
I've included this chart, which does a great job of visualizing the advantages of online learning.
Will people blur the lines between Virtual Reality and Reality?
Tuesday, October 20, 2009
Tweeting Cyberspace
Six Degrees of Separation
Hyperlink
Neil Postman
Cyberspace
Virtual reality, though it has slowed down in progress, has some really cool aspects to it. The army frequently creates simulators to imagine what iit would be like in battle. Drawing from this technology, consumers have been exposed to virtual reality through all sorts of different things. Disney world had this exhibit where you could ride a "virtual space mountain": (skip to about 1:30 for the video)
Medical Telepresence & Robotic surgery
Cyberspace
Cyberspace: a virtual world
Tuesday, October 6, 2009
Digital and Analog
Privacy in the Digital World
Unlike computers, humans perceive information in analog. We capture auditory and visual signals as a continuous stream. Digital devices, on the other hand, estimate this information using ones and zeros. The rate of this estimation, called the "sampling rate," combined with how much information is included in each sample (the bit depth), determines how accurate the digital estimation is.
This video actually ends up being an ad for SafehouseExplorer but the concept of the video is really important. In this "digital age" our privacy is at an increased risk. Many of us have our whole lives on our computers, online, and on our cell phones; Our whole worlds saved into binary code. Websites track our use and save data, you lose a usb drive, you lose all of your personal information. Thanks digital world, where did our privacy go?!
Digital Information
The Digital World
What's the Difference Between Analog and Digital?
This is a diagram of an analog wave:
One of the disadvantages to an analog signal is its susceptibility to be interfered with by noise. Because analog signals are not easily compressed, they are more likely to be warped by unwanted noise.In digital technology, the analog wave is sampled at some interval, and then turned into numbers that are stored in a digital device. Computers do this by converting the signal into a strain of 1's and 0's. A cd player is an example of a digital technology, while an audio cassette player would be an example of an analog one.
Digital recording has many advantages over analog. Primarily, it produces a much warmer, richer, and more natural sound than analog recording. The reason for this is demonstrated in the following picture:
As one can see, because digital signals can be compressed and their waves can only reach a certain height, they are not very susceptible to interference from noise. As a result, the waves maintain their original form and are easily and accurately interpreted by a computer.
Digital vs. Analog in Recording and A Recent Digital Event
Digital Manipulation
One of the most common comparisons made between digital and analog is with music recordings. At what point does a digital file cease to be a recording, and instead become a programmed performance in its own right? Lance Strate proposed this question in an earlier post and it speaks to a lot of controversy surrounding digital and analog forms of recording. Some musicians prefer analog recordings because the sound you hear is as close to being in the same room as the artist as possible without actually being there. However, modern recording artists tend to take full advantage of digital recording capabilities. Digital recordings can be converted, enhanced and manipulated on a computer to give you the final product. Take the newly popular “auto-tune” digital feature used by popular artists like Kanye West, and originally Cher in her song “Believe,” to produce a synthesized, digitally “perfect” vocal tone. Auto-tune uses a voice encoder to correct pitch in vocal and instrumental performances. It is used to disguise inaccuracies and mistakes, and has allowed many artists to produce more precisely tuned recordings (Wikipedia). Although the music we hear today on the radio is widely popular, could we actually call them “recordings?” What are the justifications between authentic audio content and an enhanced, auto-tuned “performance?”
There is no answer to this argument. Consumers in our modern society take tweaked and manipulated audio files to be forms of entertainment and have become widely popular. Digital technology has allowed for numerous advancements in music and the outcome of such is a subjective matter. Some will see it as taking away from the true talent that many musicians possess and others see it as the future and pure-genius.
Source: pcmag.com, techmind.org, wikipedia.org
Monday, October 5, 2009
Digital definition
Digital Language & Communication
DIGITAL
According to PCMAG digital “means perfect copies, the 0s and 1s of digital data mean more than just on and off. They mean perfect copying. When information, music, voice and video are turned into binary digital form, they can be electronically manipulated, preserved and regenerated perfectly at high speed. The millionth copy of a computer file is exactly the same as the original. While this continually drives the software and content publishers crazy protecting their copyrights, it is nevertheless a major advantage of digital processing.”
Nearly everything has become or is becoming digital. From digital video discs (DVD) to digital photography, we are surrounded by everything that is digital. We are drawn to everything digital because it brings many benefits for both consumers and firms. In addition, virtually everything is transitioning towards the internet and adapting to the rapidly changing world of media. According to techmind.org, “when compared to analog records or cassette tape, the CD has demonstrated greater dynamic range (which means no hiss during quiet parts of the music), very good and flat frequency response (so the sound is crisp), and the format is notably resilient to dust, dirt and scratches.” This is even more true for compressed MP3’s.
However, the digital world has not brought enthusiasm to everyone. Stephen Lacy, Professor at Michigan State University states that the “digital distribution of information has created concerns about the future of news organizations. Observers have speculated on how the Internet has and will change journalism, with almost as many different conclusions as there are speculators. These concerns have caused journalism educators around the country to reevaluate how they teach journalism.”
The future for digital technology is uncertain, but what is certain is that we will continue to accept, entrust and rely on digital technologies.
digital takeover?
Although as a culture it seems like digital technologies are preferred at this point, we do have to give some credit to analog technologies. Without analog technologies, we (or our parents!) would not have been able to listen to the music that defined their generation. Analog technologies were used for vinyl records, 8-tracks, and even cassettes. In a way, I almost prefer analog technologies as a way to define a true artist. Although we have many great talents of our generation, digital technologies for CDs and MP3s help “clean up” tracks that artists create; they’re “digitally” remastered. Do you think this takes away from the artist’s credibility as a true talent, if their “talent” can be digitally restored and edited?
However, digital technologies sometimes rely on analog technologies to exist. For example, “when an analog waveform like music is recorded with a digital recorder, the music is sampled several thousand times per second. For a CD-quality recording, the average sampling rate is 44,000 times per second. That’s 44,000 numbers stored for each second of music. The higher the sampling rate, the more accurate the recording” (wisegeek.com).
Here’s a really interesting, real life example on the differences between analog and digital when it comes to artists recording and using modern technologies
http://www.youtube.com/watch?v=rrJBEmz5teA
I just have to wonder how much longer analog technologies will still be used in our world of digital media.
Sunday, October 4, 2009
DIGITAL VS ANALOG
As a technology, analog is the process of taking an audio or video signal (in most cases, the human voice) and translating it into electronic pulses. Digital on the other hand is breaking the signal into a binary format where the audio or video data is represented by a series of "1"s and "0"s. Simple enough when it's the device—analog or digital phone, fax, modem, or likewise—that does all the converting for you.
The newer of the two, digital technology breaks your voice (or television) signal into binary code—a series of 1s and 0s—transfers it to the other end where another device (phone, modem or TV) takes all the numbers and reassembles them into the original signal. The beauty of digital is that it knows what it should be when it reaches the end of the transmission. That way, it can correct any errors that may have occurred in the data transfer. What does all that mean to you? Clarity. In most cases, you'll get distortion-free conversations and clearer TV pictures.
The word DIGITAL describes any system based on discontinuous data or events. The important word here is discontinuous, which means not continuous or having breaks. The opposite of digital is analog.
ANALOG processes information more or less in a continuous stream. The difference can be easily seen in a clock. An analog clock is one with hands that move around the clock continuously producing a stream of time. Any minute and any fraction of a minute can be represented. For instance, you could look at an analog clock and say with some degree of accuracy that it is one and one half minutes past one o'clock. You could see that the minute hand was half way between one and two minutes. The average digital clock, which shows the time by flashing the hour and the minute, produces distinct minutes but cannot represent a half of a minute or a quarter of a minute. The digital clock will show that it is one minute past one or two minutes past one. You cannot tell from looking at the clock if it is one and one half minutes past one or one and a quarter minutes past one.
From the above description, you may surmise that analog is more detailed than digital, but that assumption would be incorrect. Although the normal digital clock will show only minutes, a more detailed digital clock could show fractions of minutes – even a thousandth or millionth of a second, something that an analog clock could not do as accurately. Digital equipment can accurately produce minute details. In addition, digital processing is important because a computer or other digital piece of equipment can store and manipulate digital signals quickly and easily. In addition, digital signals can be converted to analog signals to create a very high quality reproduction.
http://telecom.hellodirect.com/docs/Tutorials/AnalogVsDigital.1.051501.asp
www.dictionary.com
http://electronics.howstuffworks.com/question7.htm
http://www.cellphonecarriers.com/compare-digital-analog.html
Digital and Analog Technology
Analog capabilities has been around for many decades, while digital is a newer ability. Among the disadvantages of analog are the limitations of the amount of data it can carry. Analog technology can only handle so much information at a time until it is overwhelmed. The new digital technology however, in breaking up sound and video and placing it into binary code, can carry more data. Disadvantages of digital are that since the technology is consistantly encoding and decoding, the quality of the end message isn't as clear as the analog version since it has been dismantled and put back together when recieved.
In today's world, we are consistantly hearing of new digital availabilities. Digital satellite television, or digital phones service. Having not really known what the big difference is, the way they make it sound in commercials is that digital is far superior to analog. And while it may be better, the disadvantage of bad quality is a concerning.
Friday, October 2, 2009
Digital vs. Analog
But! According to the website, digital is technology that transmits data in terms of positive or negative. These polarities are represented by a string of 1's and 0's, which goes back to the difference between bits and bytes. Each of these individual digits is a bit, but a string of them together used to convey information is a byte.
Analog is the older medium for processing information. Instead of the string of information conveyed in 1's and 0's, analog sends information by electric signals that have different frequencies and amplitudes.
Digital is the technology used in satellite communication, new cell phones, and fiber optics. The change over to strictly digital TV happened June 12th, but was supposed to happen much earlier. The government was handing out coupons in order to aid people who wanted to purchase a digital box. If a person used to use an antennae on top of his house to get tv, he would be using analog signals, while anyone watching FiOs tv is in the new era of digital technology.
Thursday, October 1, 2009
A Glance at Digital Divide
- Analog-Analog systems are very tolerant to noise, make good use of bandwidth, and are easy to manipulate mathematically. However, analog signals require hardware receivers and transmitters that are designed to perfectly fit the particular transmission. If you are working on a new system, and you decide to change your analog signal, you need to completely change your transmitters and receivers.
- Digital-Digital signals are intolerant to noise, and digital signals can be completely corrupted in the presence of excess noise. In digital signals, noise could cause a 1 to be interpreted as a 0 and vice versa, which makes the received data different than the original data. Imagine if the army transmitted a position coordinate to a missile digitally, and a single bit was received in error? This single bit error could cause a missile to miss its target by miles. Luckily, there are systems in place to prevent this sort of scenario, such as checksums and CRCs, which tell the receiver when a bit has been corrupted and ask the transmitter to resend the data. The primary benefit of digital signals is that they can be handled by simple, standardized receivers and transmitters, and the signal can be then dealt with in software (which is comparatively cheap to change).


