先進網際網路HomeWork5

1. Read the abstract of Paper 3, 6 and 7. If possible, skim the whole paper.
Summarize the papers briefly.
Ans:
Paper3：Social Network Analysis to Blog-based Online Communities
Summary :

• Social Network Analysis (SNA) is used as a research vehicle to investigate the structural patterns of blogging communities. SNA is a sociological methodology for analyzing patterns of relationships and interactions between social actors in order to discover the underlying social structure. Not only the attributes of social actors, such as their age, gender, socioeconomic status, and education, but also the properties of relationship between social actor, such as the nature, intensity, and frequency of the relationships, are believed to have important implications to the social structure.
  
• "good conversations” in the blogs as social media are beneficial to peer support and social learning.
  
• Most blog platforms provide a personal writing space that is easy to publish, sharable, and automatically archived and empower users to form learning communities by way of inter-linkages.
  
• Blog is an effective and efficient tool of knowledge management. And They are easily linked and cross-linked, thus creating larger on-line communities.
  
• Blogs are easy to maintain, low cost, easy to deploy, and simple to get stared. Using blogs is found to simplify the tasks of reducing piracy.

Paper6：Mobile Computing for Indoor Wayfinding Based on BluetoothSensors for Individuals with Cognitive Impairments
Summary :

• Bluetooth is an industrial specification for wireless personal area networks (PANs). Bluetooth provides a way to connect and exchange information between devices such as mobile phones, laptops, PCs, printers, digital cameras, and video game consoles over a secure, globally unlicensed short-range radio frequency.
  
• Bluetooth is used for personal way finding purposes where Bluetooth beacons and ID scanning are used, but no device inquiry, time-consuming pairing, or information exchange does happen. Bluetooth operated in this discovery mode saves power, eliminate manual passkey challenges, and reduce privacy and security concern as the use does not expose her ID. Based on the Bluetooth beacon received, the position where the user is can be identified at the remote server and enable the way finding sequences.
  
• This paper present a wayfinding prototype system based Bluetooth sensors for individuals with cognitive impairments.
  
• The design draws upon the cognitive models of spatial navigation and consists of wayfinding devices and a navigation system.
  
• The success ratio can depend on:

-- the extent to which participants suffer from mental disabilities,
-- the complexity of routes,
-- the degree of received training and self-practices, and
-- the distractions the participants may encounter.

Paper7：Action Science Approach to Experimenting Nonprofit Web 2.0 Services for Employment of Individuals with Mental Impairments
Summary :

• The authors study the processes of how to unleash the power of Web2.0 to assist people with mental disabilities and their caregivers.
  
• This research is interested in applying Web2.0 to employment services for people with mental disabilities. Because Web2.0 empowers users become content contributors instead of just content consumers. And it also can save time and money. The users no longer need to worry about the software and hardware maintenance, which can be complicated work.
  
• This paper applied the technology of Web2.0 in an employment services system for individuals with mental impairments to make their organizational operation more efficient, called Nonprofit 2.0. and the prototype has been built and tested by the job coaches with significant success.
  

2. According to Chap. 6 of Textbook. what is a functional architecture of e-commerce systems?
Ans:
A functional architecture of e-commerce systems consists of several components with its own unique functions that linked together. There are four primary components of e-commerce systems:

1. Client: computer system, typically a PC, which is connected to the internet. Usually used by buyer to browsing and/or purchasing. (e.g.: home PC, PC of buyer's company).
   
2. Merchant: computer system or systems that contain the seller's electronic catalog and, in the case of online goods, products for over-the-Net fulfillment. (e.g.: content servers).
   
3. Transaction system: computer system or systems that process a particular order and that are responsible for payment, record keeping, and other business aspects of the transaction. (e.g.: application servers).
   
4. Payment gateway: computer system that routes payment instructions into existing financial networks such as for credit card authorization and settlement. (e.g.: resource managers).
   

3. Lab: PageRank
PageRank is a tool for measuring the importance of websites. Given every URL, there is a PageRank value for it.
Ans:
Sir, already done! Please the attached figures.
New York Time
CNN.Com