| MP3 and Online File Sharing |
[May. 20th, 2006|10:20 pm] |
MP3 and Online File Sharing.
1.A: They all are file transfer system to share information.
Ftp- file transfer protocol
Http- hypertext transfer protocol
Ssl- secure sockets layer
Smtp- secure mail transfer protocol
Pop- post office protocol
Tcp/ Ip- transmission control protocol/ Internet protocol
2.A: They both use the HotSpot performance engine, but the server VM optimizes aggressively up-front for the benefit of long-term performance, while the client VM defers a lot of optimization to favor faster startup and a smaller memory footprint.
3.A: I use the music downloading system called Kugoo. It's very useful that it's a P2P file transportion sysytem. First, I download the software of Kugoo from its website, then set up it in my computer. When I want to download music, usually I will type in the name of the song and search, then klick on one of the list. It will download automatically, when it finished, I can listen to that song. Sometimes I will go find the list of song that people put on Kugoo and klick on them to download.
4.A: a)Napster (Napster was Fanning's nickname in high school, because of his hair) is a different way to distribute MP3 files. Instead of storing the songs on a central computer, the songs live on users' machines. This is called peer-to-peer sharing, or P2P. When you want to download a song using Napster, you are downloading it from another person's machine, and that person could be your next-door neighbor or someone halfway around the world.
b)The simple fact is that P2P is here to stay, regardless of legality disputes. Since the introduction of Napster, many other similar utilities and Web sites have appeared. And most of them do not limit file sharing to just MP3s as Napster did. Some, like Gnutella, allow virtually anything to be shared.
c)BitTorrent is a protocol designed for transferring files. It is peer-to-peer in nature, as users connect to each other directly to send and receive portions of the file. However, there is a central server (called a tracker) which coordinates the action of all such peers. The tracker only manages connections, it does not have any knowledge of the contents of the files being distributed, and therefore a large number of users can be supported with relatively limited tracker bandwidth. The key philosophy of BitTorrent is that users should upload (transmit outbound) at the same time they are downloading (receiving inbound.) In this manner, network bandwidth is utilized as efficiently as possible. BitTorrent is designed to work better as the number of people interested in a certain file increases, in contrast to other file transfer protocols.
5.A: We can search some music songs on the internet and then we can listen to them from an online music store. They’re free.
6.A: Some other people use the Emule and Kugoo, They are both P2P system to transport media files, the advantages are you can easily search on the P2P server to find your favorite media files.ring |
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| (no subject) |
[May. 13th, 2006|04:14 am] |
6. Article
m) Read the article and write your comments…
After I read this article, i feel internet is so developing now. People can do everything in internet. People also can harry others in internet. However, people also use internet to crime. it's becoming easier for people to acquire and abuse technology.The one-year jail sentence is rare for harassment convictions involving no previous criminal record. but judge said cyberstalking had a serious, far-reaching effects. so using laws to stop cyberstalking is so important, because it will bring a far-reaching effects.
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| Security Privacy (four) |
[Apr. 28th, 2006|11:02 am] |
4. How to be vigilant.
i) What is a cookie? (Look in: “I’ve been hacked”)
Cookies have become standard practice on the internet.they're also used by marketers and advertising companies.Cookies allow web sites, ad agencies and other organizations to track your online behavior, to ascertain your interests, and ultimately to create a detailed personal profile on you as a consumer.
j) What is a cookie buster? (“Look in: Practical Privacy Tools”)
cookie buster can be Burnt Cookies, cookie cruncher, cookie jar, cookie crusher, Spy Blocker,MagicCookie Monster .
k) What are 5 good tips on how to protect yourself and your computer?
(Look in the “Advice” section)
First thing I'd do is evaluate carefully whether I wanted broadband with connections like the cable modem or a DSL connection. I would also be careful to manage my desktop and the data on my system to limit the kind of data I would have in my system. I'd also be careful in my habits on the internet. I'd be careful where I'd go. I'd be more responsible and understand that environment better than just ad hoc travelling around on that environment.
5. Interviews
a) Read one interview and tell me about the hacker's attitude and feelings about what they've done.
All the hackers believe they did it because they wanted to help people. they didn't think it was wrong to be a hacker. Sometimes, they think they did it because they developed the program to demonstrate the weak security in Microsoft products.
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| Security Privacy (three) |
[Apr. 28th, 2006|10:47 am] |
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3. Who’s responsible for security?
h) Tell me three reasons why people are mad at software companies for weak security.
1. Software companies create these environments that are just so unstable. We take it for granted now that computers will crash several times a day.
2. We take it for granted that you have to be afraid when you get an email attachment; you have to figure out where it came from.
3. "Is it worth it to open this spreadsheet where I might blow up my computer?" We've developed a kind of culture of a passive, beat-down fear. . . . If you got in your automobile and every day it would stall several times, and every once in a while it would just sort of randomly explode into flames and destroy all of your personal belongings, like when your computer crashes and you lose your files, you would be really mad, and furious at the car manufacturer. . .
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| Security Privacy (two) |
[Apr. 28th, 2006|10:17 am] |
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2. Risk of the internet’s vulnerabilities.
d) Tell me one danger for computer users
The danger for the average computer user is that someone will hack their system. Now, on the internet, there are other dangers, because your computer could be a launching pad for other attacks. So people might want to break into your computer to use your computer as a site to break into something further on.
e) Tell me one danger for corporations
For a corporation, the dangers are very great, and we see it again and again. We see major web sites that are hacked, and they're brought down for six, eight, ten hours. This affects their bottom line if they have a revenue model. We see a company like CD Universe get hacked and have 300,000 credit card numbers stolen. This greatly affects their credibility, and I don't know if they've recovered yet from that.
f) Tell me one danger for governments
For a government, the dangers to it are as great as a corporation. When the major web sites that are hacked, the secret document would be brought outside, and it is a risk to the national defence.
g) Tell me one danger for YOU
For me, I think there is nothing worthy to be stolen by the hackers, so if my computer is hacked, it would be a site that be used to attacked further more by the hackers. Also, my computer system would be destroyed, information that is useful to me would lost. |
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| Security Privacy (one) |
[Apr. 28th, 2006|10:07 am] |
1. Who are the hackers?
a) How did anonymous learn how to be a hacker?
Well, it's power at your fingertips. You can control all these computers from the government, from the military, from large corporations. And if you know what you're doing, you can travel through the internet at your will, with no restrictions. That's power; it's a power trip.
b) What did the hacker Curador do?
Curador is a 18-year old hacker from rural Wales who in the winter of 2000 stole an estimated 26,000 credit cards numbers from a group of e-commerce web sites, and posted the numbers on the web.
c) What are 3 of the biggest hacks of all time? (Look in: “Notable Hacks”)
Morris Worm in 1988, Phonemasters from 1994 to 1995, and Citibank from 1994 to 1995
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| Health care..... |
[Apr. 13th, 2006|07:43 pm] |
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· In the past, how has IT influenced health care?
In the past, information technology wasn't developed very much. However, people still could use computers to find out unvisible viruses or development of diseases.
·In the future, how will IT influenced health care?
In the future, information technology will be used more widely. People could use IT to do things human could not do. People would more and more depending on information technology.
· Do you think we should be studying stem cells?
Yes, it is very important to study stem cells. People can use stem cells' separation and culture in vitro to breed organs or organization in vitro. We also can transplant organs or organized treat disease. so stem cells'studying is so important.
· How will the virtual human help research?
It is very good to know every body part very clearly by using virtual human. The virtal human's body parts are illustrated like the real body part. So we can use some pictures and virtal body to let us know what our lungs, hearts, and muscles look like.
· How will the virtual human change medical schools?
Some students can ubderstand everything what the books talk about. However their practices are not very good because they don't know how to use what they had learned. The virtual human help them to partices medical. It let students to make less mistake in their lab.
· What can you do on this website?
In this web, I can compare the pictures with my body parts and look for any different. From this web, I will take of myself and know something general knowledge about health.
·In the future, how will this influence the jobs of doctors and lives of patients?
The patients will know medical and their body parts more clearly.
· Find 5 Different Websites that help people who have diseases meet and support each other.
http://www.5191.com
http://tj.zhaohua.com
http://www.jfdaily.com
http://www.chinafpa
http://www.people.com
·What kind of help is available on these sites?
People who get disease can check information from the website, and get courage from the website.
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| 造句：才子佳人 |
[Apr. 13th, 2006|07:10 pm] |
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《唐伯虎点秋香》这个才子佳人的故事早已传遍大江南北。 |
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| Cell phones and text massage |
[Apr. 6th, 2006|04:55 pm] |
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I like to use cell phone because it is convienent. I can call anyone at any time I want. I like that!! Also, sending massages to my friends is very interesting. I always get many funny massages from them. It makes me very happy.
However, it spends me much time and money by sending massages. Sometimes I can chat with my friends for hours by sending massages. Of course it will cost a lot of money. |
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| E-mail |
[Apr. 6th, 2006|04:30 pm] |
I like E-mail. I can talk with my friends who are in the other side of the earth by using E-mail. Also, it's free and quick. I can add my image and on-line novel in the accessories as my gifts!!They will be very happy when they are reading interesting novels and looking at my pictures.
However, E-mail also has disadvantages. I always receive many garbage from the Internet. It always makes me annoyed. |
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