Three papers are summarized.
星期五, 11月 30, 2007
星期日, 11月 18, 2007
11-17-2007 Homework
繳交作業方式
Dec-1-2007 11:59 a.m. Due
1. Read the abstracts and skim the full papers, and then comment on the three papers.
特別提醒: 必須使用學校IP網域才可以下載，中原大學已經購買ACM所有出版品的電子下載權利。在學校上網下載就沒有問題。
Notice:
11/24/2007 - the midterm week. No class meeting. (停課ㄧ次)
Dec-1-2007 11:59 a.m. Due
1. Read the abstracts and skim the full papers, and then comment on the three papers.
特別提醒: 必須使用學校IP網域才可以下載，中原大學已經購買ACM所有出版品的電子下載權利。在學校上網下載就沒有問題。
Notice:
11/24/2007 - the midterm week. No class meeting. (停課ㄧ次)
12-1-2007 Talk Outline
OFDM (Text pp 2-55 ~2-87, Handout pp. 86-91)
1. Student Oral
P1: g9577601
P2: Claire
P3: Chen
ps: slides sample.
1. Student Oral
P1: g9577601
P2: Claire
P3: Chen
ps: slides sample.
星期一, 11月 12, 2007
CSMA
CSMA p-persisitent, 1-persistent
- offerer load vs. throughput behavior & mechanism (Textbook pp. 2-48~2-51)
- CSMA/CD improves performance
- drawbacks of CSMA/CD in long distance and high speed communications
- interference and noise
- Shannon Theory
- the need of modulation for practical communication enigineering
- nonlinear characteristics of modulation and reduction of nonlinear effects
- Optical communication
- Wavelength Division Multiplexing (WDM)
星期日, 11月 11, 2007
11-10-2007 Homework
In the talk, we introduced the evolution of contention based protocols:
1. ALOHA
2. CSMA (Carrier Sense Multiple Access)
3. CSMA/CD (collision detection) -> IEEE 802.3 (Ethernet, 100M, 1Gbps)
Problems:
1. Why does Pure Aloha perform worse than Slotted Aloha?
2. According to Textbook pp. 2-48~2-51, why does 1-persistent CSMA have lower throughput than non-persistent CSMA when generated traffic rate is higher than 1 (G>1)? Why does 1-persistent CSMA have shorter latency than non-persistent CSMA?
1. ALOHA
2. CSMA (Carrier Sense Multiple Access)
3. CSMA/CD (collision detection) -> IEEE 802.3 (Ethernet, 100M, 1Gbps)
Problems:
1. Why does Pure Aloha perform worse than Slotted Aloha?
2. According to Textbook pp. 2-48~2-51, why does 1-persistent CSMA have lower throughput than non-persistent CSMA when generated traffic rate is higher than 1 (G>1)? Why does 1-persistent CSMA have shorter latency than non-persistent CSMA?
星期五, 11月 09, 2007
先進網際服務系統
The language of this course is ENGLISH.
Advanced Internet Services and Systems will be one of my Spring 2008 courses. See a previous syllabus for Fall 2006.
I would like to elaborate more on Web 2.0, emerging dynamics and interactions of online communities, web services, and mobile Internet. When the updated syllabus is ready, I will post it.
Advanced Internet Services and Systems will be one of my Spring 2008 courses. See a previous syllabus for Fall 2006.
I would like to elaborate more on Web 2.0, emerging dynamics and interactions of online communities, web services, and mobile Internet. When the updated syllabus is ready, I will post it.
星期四, 11月 08, 2007
星期四, 11月 01, 2007
ASSETS 2007三篇分析行動載具使用者需求的論文
身為工程師，我們總是想到要實做出來才算完成ㄧ個研究，這次ACM ASSETS 2007 有三篇論文不約而同做需求分析，並沒有實做，反而是把分析本身做得很仔細，這是我們可以學習的。
身心障礙者使用這些科技可能會遭遇哪些問題，他們的需求是什麼? 透過這三篇深入的田野調查與洞見分析，我們或許可以更進入這個身障者的世界。
身心障礙者使用這些科技可能會遭遇哪些問題，他們的需求是什麼? 透過這三篇深入的田野調查與洞見分析，我們或許可以更進入這個身障者的世界。
Using participatory activities with seniors to critique, build, and evaluate mobile phones
Michael Massimi, Ronald M. Baecker, Michael Wu
Pages: 155 - 162
Full text available:
Pdf(2.12 MB)Observing Sara: a case study of a blind person's interactions with technology
Kristen Shinohara, Josh Tenenberg
Pages: 171 - 178
Full text available:
Pdf(286 KB)Understanding mobile phone requirements for young adults with cognitive disabilities
Melissa Dawe
Pages: 179 - 186
Full text available:
Pdf(251 KB)
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