Friday, October 24, 2008
Why 2G is faster than 1G
1G is attached to analogy cell phone .
2G is attached to “Global System For Mobile Communication” which is the general mobile phone in the world.
What’s their different? Communication is the principle function to identified 1G or 2G device .
In past years,1G device could be copied and eavesdropped . Isn’t only this , this communication just the “”no good speak function “”because of the transmit rate in 1G is just 9.6~14.4kbps which reason is too slow to satisfy consumers . Until to 2G device., the function add the web communication , fax and digital transmissions … even road track and navigation ; stock and exchange rate information;short message service .
2. Why cellular is better than broadcast?
Because cellular is the refer to communication systems , especially the Advance Mobile Phone Service (AMPS), that divide a geographic region into sections, called cells. The purpose of this division is to make the most use out of a limited number of transmission frequencies. Each connection, or conversation, requires its own dedicated frequency, and the total number of available frequencies is about 1,000. To support more than 1,000 simultaneous conversations, cellular systems allocate a set number of frequencies for each cell. Two cells can use the same frequency for different conversations so long as the cells are not adjacent to each other.
3. Describe a short history of development of cellular technology from 1G to 3G with a prediction of 4G and beyond.
Mid 1940s-after world War II----United States cellular Planning began
1946-----The first America commercial mobile redio-telephone service issue
1978-----Trial service began
1964----- the Bell System began introducing Improved Mobile Telephone Service or IMTS, a replacement to the badly aging Mobile Telephone System.
1969----- the Bell System employed frequency reuse in a commercial service for the first time.
Over the years, in stages hard to follow, often with 2G and 3G techniques co-existing, TDMA based GSM and AT&T's IS-136 cellular service will be replaced with a wideband CDMA system, IS-136 will first be replaced by GSM before going to UMTS. Technologies will extend the life of these present TDMA systems but eventually new infrastructure and new spectrum will allow CDMA/UMTS development. The present CDMA system, IS-95, which Qualcomm supports and the Sprint PCS network uses, is narrowband CDMA.
4. Read the article that discussed the future of mobile social networks.
Fake has been involved in blogging and online communities since the 1990s. and co-founded photo-sharing site Flickr in 2004 , then sold the site to Yahoo.
Key to its success was the way it let users browse other people’s images, adding comments and forming groups based on shared interests or friends.
Nowaday, you can download its service to cell phone for free and if cell phone has bluetooth it will vibrate when another aka-aki member comes within 20 meters of you . you can then view that person’s profile and if we like what we see ,message them, or perhaps even risk a real-life conversation.
If you’re at a party we can scan for someone with the same interests as you ., or just check out who’s single.Of course , ou can just only detected by your friends or friends of friends.
Another developer came up with command, a social networking application that uses GPS to let you know where your friends are . You could use it to spot that a friend is a couple of blocks away and arrange an impromptu meeting ., It also lets you set up alerts—for example when one of your of friends is within a certain distance of a given location—ideal if your’re trying to avoid that friend you owe $20.
However , no doubts it .. the future of mobile social networks will be more and more advancement .
Tuesday, September 23, 2008
GPS function change
Ans:
The discussion on last Saturday really let me know how the technology more and more advance , especially the GPS function already has the blood pressures 、track log record、data logger support、time accurately……although we both know about that the figure is not precisely , but this is really the great advance in human technology.
There is also have a surprise product produced ----sport type GPS that is a small and convenience product which and benefit to the sport people because of it can do the temperature display , altitude and tracking log and it has the great function that I really prefer when I link the internet to found the product ---provide friendly sharing log.
However , I believe that technology advancement is everywhere if human been , and I’ll also expect about the more development appear in the world and my life .
2. Watch the video recording of KF Lee's keynote speech on WWW 2008 Beijing on Cloud computing. Feel free to write what you think.
Ans:
Cloud computing is the basic conception of the web .the operation can take apart from the huge operation system to the P2P system for calculate.
Internet sever can deal with the lot of data in few seconds By using the skill,
provide the more effect web sever to fit in the request from many people .
We can see cloud computing everywhere in web , just like Email be stored in many servers not in computer , and trial balance which provide by internet sever is also rely many severs calculate . In the future, mobile phone and PDA will be mounted the skill either .
I think the web service development will provide more diversified function because of the webs connect each other . . People can progress the complex calculate by the internet which data is provided by every internet severs like fall in more and more skills from cloud .
Tuesday, June 17, 2008
Knowledge Sharing and Yahoo Answers : Everyone Knows Something
and the last fellow writings is my opinion
Knowledge Sharing And YahooAnswers :
Everyone Knows Something
Abstract
YahooAnswers is a large and diverse question-answer forum. Where one can seek advice , gather opinions , and satisfy one’s curiosity about a countless number of things.
Introduction
One of the largest knowledge exchange communities is Yahoo which can share knowledge and expertise online. It is a kind of collective brain-a search –able database of everything everyone knows.
Prior work
Sharking knowledge has been a research topic for at least 15 years , but now internet-scale knowledge sharing is of considerable interest . This knowledge sharing includes repositories (concluding those socially constructed as with wikipedia ) as well as online forums designed for sharing knowledge and expertise.
In general , there is a large body literature examining on-line interaction space , especially Usenet , this line of research also used social network analysis to examine forums.
Yahoo Answers And Data Set
The format of interaction on YA is entirely through questions and answers. A user posts a question , and other users reply directly to that question with their answers. It is important to note that these discussions are constrained by the setup of the YA system for technical expertise sharing with a strict question and answer format . Threads must still start with a question , YA users discuss by answering the question ,not by addressing one another. Furthermore one cannot answer more than once nor can one answer oneself , making Usenet-type discussions difficult.
Characterizing YA Categories
1 . Basic Characteristics
Based on an initial examination of YA, we expected that every category would have some mix of requests for factual information , advice seeking , and social conversation of discussion .
2. cluster analysis of categories
The are several aggregate measurements for each category . The activity in each category ranged from 216061 questions in singles & Dating , to 129013 questions about religion and spirituality , 48624 mathematics questions , and only 5 questions on dining out in Switzerland. The analysis considers 189 categories, which together constitute over 91% of all questions posed on YA.
3. Network structure analysis
By connecting users who ask questions to users who answer them , we can create an asker-replier graph ; we call these QA networks. The analysis of QA networks sheds light on important aspects of interaction that are not easy captured by non-network measures.
4. Expertise Depth
5. Expertise And Knowledge Across Categories
Given the wide variety of behavior and interests in the different forums , we saw
An opportunity to describe how knowledge and expertise are spread across different
Domains .
6. Predicting Best answers
So far, that have observed distinct question-answer dynamics in different forums . The results for Yahoo answers stand in stark contrast to our previous analysis of Sun’s Jave Forum, where the number of previous replies strongly correlated with the expertise level as judged by independent human raters.
7. Conclusions
Yahoo Answers is a large and diverse question answer community, acting not only as a medium for knowledge sharing , but as a place to seek advice , gather opinions , and satisfy one’s curiosity about things which may not have a single best answer .
The are advantage of the range of user behavior in YA to inquire into several aspects of question-answer dynamics.
First is contrasted content properties and social network interactions across different YA categories .
The second , identified related categories. By asking whether a user who answers questions in one category is also likely to answer in another.
Finally , attempted to predict best answers based on at tributes of the question and the replier.
MY OPINION
In future work , we would more and more rely on YA knowledge sharing . YA has
Accomplished a large feat – everyone know something, and through our analysis .
But the problem is , the forum still not useful and clear because there not always has the professional person to join the knowledge forum , I think, maybe is … …. They wouldn’t give the free answer ..HA, I ‘m joking . But my suggestion is YA can provide the more convenience and aeriform benefit to the knowledge provider then the YA knowledge forum must be get together more and more users who will not change they knowledge but also provide their valuable experience .
Friday, April 25, 2008
Electronic issues in internet commerce
1. Read the abstract of Paper 3, 6 and 7. If possible, skim the whole paper.Summarize the papers briefly.
2. According to Chap. 6 of Textbook. what is a functional architecture of e-commerce systems?
Ans(1):
Electronic issues in internet commerce
The electronic commerce include use of computing and communication technologies in the financial business, online airline systems , orer processing , inventory management, and so on. In a word , electronic commerce is meaning EDI, originally created for linking together the participants in the transportation industry, and become a common tool for many organizations working with the suppliers., and there are many specialized product on the mar-ket for creation EDI-internet application.
Business issues in internet commerce
Internet commerce is about business using the network effectively to achieve business goals which include changes in both computing and communication , provides many tools that can be used in reaching those goals, if we do not have a clear idea of our business goals in using the network , then technology cannot help us achieve them. However , the business goal, including how to measure success is the key , not just and idea .
Paper 3
Paper 6
Ans (2): One of the main requirements in e-commerce is the ability to accept a form of electronic payment. This form of electronic payment is referred to as financial electronic data interchange (FEDI). FEDI has become increasingly popular over the last number of years due to the widespread use of the internet based shopping and banking.
Credit Cards and Smart Cards
Over the years, credit cards have become one of the most common forms of payment for e-commerce transactions. In the early years of B2C, many consumers were apprehensive of using their credit cards over the internet because of fear that their credit card numbers would get stolen. However, due to increased security with credit card companies such as VISA, American Express, and MasterCard there is widespread use of credit card use over the internet, especially in North America.
Despite this widespread use in North America, there are still a number of countries such as China, India and Pakistan that have some problems to overcome in regard to credit card security. In the meantime, the use of smartcards has become extremely popular. A Smartcard is similar to a credit card; however it contains an embedded 8-bit microprocessor and uses electronic cash which transfers from the consumers’ card to the sellers’ device. A popular smartcard initiative is the VISA Smartcard. Using the VISA Smartcard you can transfer electronic cash to your card from your bank account, and you can then use your card at various retailers and on the internet.
Financial Cyber-mediaries
These are companies that enable financial transactions to transpire over the internet. Types of transactions include: C2C, C2B, and/or B2B. One of the best known and most successful financial cybermediaries is PayPal. This free online service allows consumers and/or businesses to send money to anyone with an email address in 45 countries. PayPal is accepted by thousands of businesses worldwide and is the preferred payment method on eBay.com. PayPal is now owned by ebay.com.
Many of the mediaries permit consumers to establish an account quickly, and to transfer funds into their online accounts from a traditional bank account (typically via ACH transactions), and vice versa, after verification of the consumer's identity and authority to access such bank accounts. Also, the larger mediaries further allow transactions to and from credit card accounts, although such credit card transactions are usually assessed a fee (either to the recipient or the sender) to recoup the transaction fees charged to the mediary.
The speed and simplicity with which cyber-mediary accounts can be established and used have contributed to their widespread use, although the risk of abuse, theft and other problems—with disgruntled users frequently accusing the mediaries themselves of wrongful behavior—is associated with them
Electronic Bill Presentment and Payment
Electronic bill presentment and payment (EBPP) is a fairly new technique that allows consumers to view and pay bills electronically. There are a significant number of bills that consumers pay on a regular basis, which include: power bills, water, oil, internet, phone service, mortgages, car payments etc. EBPP systems send bills from service providers to individual consumers via the internet. The systems also enable payments to be made by consumers, given that the amount that appears on the e-bill is correct. Banks in Canada have been offering these online payment services for some time now, and are growing in popularity. Other service providers such as Rogers Communications and Aliant accept major credit cards within the bill payment sections of their websites. This service is in addition to the original EBPP method of a direct withdrawal from a bank account through a bank such as Scotiabank.
The biggest difference between EBPP systems and the traditional method of bill payment, is that of technology. Rather than receiving a bill through the mail, writing out and sending a check, consumers receive their bills in an email, or are prompted to visit a website to view and pay their bills.
Three broad models of EBPP have emerged. These are:
1. Consolidation, where numerous bills for any one recipient are made available at one Web site, most commonly the recipient's bank. In some countries, such as Australia, New Zealand and Canada, the postal service also operates a consolidation service. The actual task of consolidation is sometimes performed by a third party, and fed to the Web sites where consumers receive the bills. The principal attraction of consolidation is that consumers can receive and pay numerous bills at the one location, thus minimising the number of login IDs and passwords they must remember and maintain.
2. Biller Direct, where the bills produced by an organisation are made available through that organisation's Web site. This model works well if the recipient has reasons to visit the biller's Web site other than to receive their bills. In the freight industry, for example, customers will visit a carrier's Web site to track items in transit, so it is reasonably convenient to receive and pay freight bills at the same site.
3. Direct email delivery, where the bills are emailed to the customer's In Box. This model most closely imitates the analog postal service. It is convenient, because almost everyone has email and the customer has to do nothing except use email in order to receive a bill. Email delivery is proving especially popular in the B2B market in many countries.
Major providers of outsourced bill production services have developed facilities to process bills through consolidation, biller direct and email delivery services, thus enabling major billers to have all their bills, paper and electronic, processed through the one service. Niche service providers in many countries provide one or two of these models, but generally do not integrate with paper bill production.
Tuesday, April 15, 2008
Electronic issues in internet commerce
Ans(1):
Electronic issues in internet commerce
The electronic commerce include use of computing and communication technologies in the financial business, online airline systems , orer processing , inventory management, and so on. In a word , electronic commerce is meaning EDI, originally created for linking together the participants in the transportation industry, and become a common tool for many organizations working with the suppliers., and there are many specialized product on the mar-ket for creation EDI-internet application.
Business issues in internet commerce
Internet commerce is about business using the network effectively to achieve business goals which include changes in both computing and communication , provides many tools that can be used in reaching those goals, if we do not have a clear idea of our business goals in using the network , then technology cannot help us achieve them. However , the business goal, including how to measure success is the key , not just and idea .
Paper 3
Paper 6
Ans (2): One of the main requirements in e-commerce is the ability to accept a form of electronic payment. This form of electronic payment is referred to as financial electronic data interchange (FEDI). FEDI has become increasingly popular over the last number of years due to the widespread use of the internet based shopping and banking.
Credit Cards and Smart Cards
Over the years, credit cards have become one of the most common forms of payment for e-commerce transactions. In the early years of B2C, many consumers were apprehensive of using their credit cards over the internet because of fear that their credit card numbers would get stolen. However, due to increased security with credit card companies such as VISA, American Express, and MasterCard there is widespread use of credit card use over the internet, especially in North America.
Despite this widespread use in North America, there are still a number of countries such as China, India and Pakistan that have some problems to overcome in regard to credit card security. In the meantime, the use of smartcards has become extremely popular. A Smartcard is similar to a credit card; however it contains an embedded 8-bit microprocessor and uses electronic cash which transfers from the consumers’ card to the sellers’ device. A popular smartcard initiative is the VISA Smartcard. Using the VISA Smartcard you can transfer electronic cash to your card from your bank account, and you can then use your card at various retailers and on the internet.
Financial Cyber-mediaries
These are companies that enable financial transactions to transpire over the internet. Types of transactions include: C2C, C2B, and/or B2B. One of the best known and most successful financial cybermediaries is PayPal. This free online service allows consumers and/or businesses to send money to anyone with an email address in 45 countries. PayPal is accepted by thousands of businesses worldwide and is the preferred payment method on eBay.com. PayPal is now owned by ebay.com.
Many of the mediaries permit consumers to establish an account quickly, and to transfer funds into their online accounts from a traditional bank account (typically via ACH transactions), and vice versa, after verification of the consumer's identity and authority to access such bank accounts. Also, the larger mediaries further allow transactions to and from credit card accounts, although such credit card transactions are usually assessed a fee (either to the recipient or the sender) to recoup the transaction fees charged to the mediary.
The speed and simplicity with which cyber-mediary accounts can be established and used have contributed to their widespread use, although the risk of abuse, theft and other problems—with disgruntled users frequently accusing the mediaries themselves of wrongful behavior—is associated with them
Electronic Bill Presentment and Payment
Electronic bill presentment and payment (EBPP) is a fairly new technique that allows consumers to view and pay bills electronically. There are a significant number of bills that consumers pay on a regular basis, which include: power bills, water, oil, internet, phone service, mortgages, car payments etc. EBPP systems send bills from service providers to individual consumers via the internet. The systems also enable payments to be made by consumers, given that the amount that appears on the e-bill is correct. Banks in Canada have been offering these online payment services for some time now, and are growing in popularity. Other service providers such as Rogers Communications and Aliant accept major credit cards within the bill payment sections of their websites. This service is in addition to the original EBPP method of a direct withdrawal from a bank account through a bank such as Scotiabank.
The biggest difference between EBPP systems and the traditional method of bill payment, is that of technology. Rather than receiving a bill through the mail, writing out and sending a check, consumers receive their bills in an email, or are prompted to visit a website to view and pay their bills.
Three broad models of EBPP have emerged. These are:
1. Consolidation, where numerous bills for any one recipient are made available at one Web site, most commonly the recipient's bank. In some countries, such as Australia, New Zealand and Canada, the postal service also operates a consolidation service. The actual task of consolidation is sometimes performed by a third party, and fed to the Web sites where consumers receive the bills. The principal attraction of consolidation is that consumers can receive and pay numerous bills at the one location, thus minimising the number of login IDs and passwords they must remember and maintain.
2. Biller Direct, where the bills produced by an organisation are made available through that organisation's Web site. This model works well if the recipient has reasons to visit the biller's Web site other than to receive their bills. In the freight industry, for example, customers will visit a carrier's Web site to track items in transit, so it is reasonably convenient to receive and pay freight bills at the same site.
3. Direct email delivery, where the bills are emailed to the customer's In Box. This model most closely imitates the analog postal service. It is convenient, because almost everyone has email and the customer has to do nothing except use email in order to receive a bill. Email delivery is proving especially popular in the B2B market in many countries.
Major providers of outsourced bill production services have developed facilities to process bills through consolidation, biller direct and email delivery services, thus enabling major billers to have all their bills, paper and electronic, processed through the one service. Niche service providers in many countries provide one or two of these models, but generally do not integrate with paper bill production.
Wednesday, March 5, 2008
what is the commerce value chain? Why not see them on an individual basis by Treese and Stewart
Q1. According to the book by Treese and Stewart, what is the commerce value chain? Why not see them on an individual basis?
Ans: get and keep customer interest(attract) -> turn interest into order(interact)->manage orders(act)->service customers(react)
The supply chain encompasses all activities associated with the flow and transformation of goods from the raw materials stage, through to the end user, as well as the associated information flows . Material and information flow both up and down the supply chain.
Supply chain management is the integration of these activities through improved supply chain relationships, to achieve a sustainable competitive advantage.
Supply chain :a set of three or more organizations directly linked by one or more of the upstream and downstream flows of products , services, finances, and information from a source to a customer.
Supply chain orientation:the recognition by an organization of the sysytemic, strategic implications of the tactical activities involved in managing the various flows in a supply chain .
Supply chain management : the systemic, strategic coordination of the traditional business functions and the tactics across these business functions within a particular company and across businesses within the supply chin, for the purposes of improving the long-term performance of the individual companies and the supply chain as a whole.
Q2.Is the Internet different from other media? Why?
Ans: Yes, it is. The internet is different from other media, because everyone can use internet to be themself personal web connect and publish themself publishment. media can't do so ...it must use tool for any communication, web connect .
Q3.Convert one of your Word document using Google docs Google docs
4. Customize your blogs.
Check into your blog homepage.
Enter "setting"
Select "Add links"
Write down "http://enminstral.blogspot.com/" and the title as "Web Services and Advanced Internet Systems"
Add your own favorite links.
Friday, February 29, 2008
Briefly describe the strategic implications of each acquisition
Google Inc. opened its door in Menlo Park, California.
2000 At the
2001 Around the world, Google's circle of friends continued to widen. An agreement with Lycos Korea brought Google search to a new group of Asian Internet users. In October, a partnership with Universo Online (UOL) made Google Latin America's premier search engine. New sales offices opened in Hamburg and Tokyo to satisfy growing international interest in Google's advertising programs. Google's borderless appeal was also evident in the evolving user interface: Users could now limit searches to sites written in Arabic, Turkish, or any of 26 other languages.
2002 Their wish came true in February of 2002, with the introduction of the Google Search Appliance, a plug-and-play search solution in a bright yellow box. Soon it was crawling company intranets, e-commerce sites, and university networks, with organizations from Boeing to the University of Florida powering their searches with "
2003 Version 2.0 of the
2004 launches included Google Groups, a new version of the venerable Usenet archive of 1 billion posts on thousands of topics that Google has managed since 2001. The new Google Groups enables users to create and manage their own email groups and discussion lists. And the Google Print program announced agreements with the libraries of Harvard, Stanford, the University of Michigan, and the University of Oxford, and The New York Public Library to digitally scan books from their collections so that users worldwide can search them in Google.
2005 The Google Search Appliance spawned a new blue Google Mini, a smaller and lower-cost solution for small and medium-sized businesses that want Google quality search for their documents and sites.
2006 it seemed all the world took notice of blogs and feeds – two important ways to publish quickly and easily, and to subscribe to many timely publication sites. After a year of learning and growing, and Google Blog runs frequent postings about Google products and people by those who know them best – and thousands of people subscribe to the feed so they can read it on the go. And in May we launched AdSense for feeds, a way for every blogger to gain ad revenue by running targeted AdSense ads within the feed. As for Blogger, we continue to develop features, including the ability to post new items and photos from anywhere – even a mobile phone.
2007 announced the Climate Savers Computing Initiative, a joint effort with more than 30 organizations to save energy and reduce greenhouse gas emissions by using more energy-efficient computers and computer equipment. Google.org announced the RechargeIT Plug-In Hybrid Car Initiative, and finished the installation of 1.6 megawatts of solar panels at our campus in Mountain View. Further,
Summarize the Web 2.0
The web2.0 abstract which is start from o’Reily and MediaLive discussion meeting. Dale Dougherty who is the pioneer , mean while ; is the second charger in O’Reilly company , in fact ; after the internet disruption , there are more popular internet application systems advent suddenly which is called 『web 2.0』 .
In pass half of one year, almost people who can use the computer also understand what is the Web 2.0 , even there were many people argued about this , and said that is insignificant . But don’t doubt it ; web 2.0 is already accepted by most people.
As the same theory as high technology pass by, web 2.0 not has exact interface
Just the important axis. We can consider it to a interplanetary which combine by every webs and in different distance .
For example , in OCT ,2004 , John Battelle and Tim O’Reilly had a discussion about rule of Web 2.0 during the first workshop . which mention that “”web should be used for cross-platform “”, although these pioneers provided these useful modus ., but there still has many problems have to be solved . therefore; although DoubleClick and Akamai are the pioneers in Web 2.0 , but there also can see the different design factor in the other internet web which became more and more popular in internet.
The special characteristic of Web 2.0 is Blog development . Actually , more and more personal Blogs appear in internet web, wherever there is not big deal of the personal diary and comment are allow read by each browser . The blog produce is by RSS skill. And which is the basic improvement in internet. We can call it Incremental web or Live web.
If Rss can make personal blog different with the others the significance of Permalink is the most important factor. Everyone can order personal photograph area from RSS and can also share with each other , the sill made the blog to be the most worth web in internet , and let Web 2.0 to be the most important pioneer in internet web.
2008.02.29 by Yen Yu