Learning and Inferring Transportation Routines

nHierarchical Activity Model

n

¨Inference

¨Learning

¨Detection of User Errors

Algorithms for Characterization and Trend Detection in Spatial Databases

Spatial characterization

Spatial trend analysis

RFID Information Grid and Wearable Computing Solution to the Problem of Wayfinding for the Blind User in a Campus Environment

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RFID Information Grid and Wearable Computing Solution to the Problem of Wayfinding for the Blind User in a Campus Environment

Indoor Navigation Infrastructure
Outdoor Navigation Infrastructure
Room and Path Mapping
RFID Technology Options
Mobile Software Platform
RFID Reader
Data Encoding on RFID Tags
NAVCOM Belt

Homework 10/27/2007

1. Read and then comment on the following papers.

Yao-Jen Chang, Shan-Yao Wu, Ting-Liang Shih, Intersection Location Service and Performance Comparison of Three Location Service Algorithms for Vehicular Ad Hoc Networks in City Environments

nILS可以說是一套專門為都市街道環境設計的Vehicular Ad Hoc Networks 演算法，考量到形成Ad Hoc Networks需要一定數量的peers，所以都市街道環境就是一個最佳環境，而ILS也在模擬中表現優於另兩種知名的演算法，足以證明其設計規劃的成功。

Yao-Jen Chang, Tseng-Yun Wang, Shi-Kai Tsai, Yu-Chia Chuang, "Action Science Approach to Experimenting Nonprofit Web 2.0 Services for Employment of Individuals with Mental Impairments" 2007 International Workshop on Social Media Analysis in conjunction with ACM/IEEE Web Intelligence 2007. (EI)

在Web 2.0的理念下，blog展現了良好的互動反應能力；以人為本，事為主的交流形式更能提昇資訊的查找與使用，但是資訊快速流通就必須注意到某些資料的隱密性，另外如果在共同編輯的blog上參與的人過多，或是過於良莠不齊，就必須將"管理"做好，這會對管理者產生ㄧ些額外的負擔。


2. Why is CSMA/CA instead of CSMA/CD used for 802.11?

因為在802.11的應用範圍內，由於無線傳送包含隱藏終端問題(A B C
C不在A的範圍A也不在C的範圍，他們又同時傳給B)，路徑的準位變動相對大很多，所以對於Collision Detection是無法達成，就採用需要較長時間的Collision Avoidance。