代理伺服端架構之情境導向內容調適

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林士騏(Shi-Qi Lin) 查詢紙本館藏

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資訊工程學系在職專班

論文名稱

代理伺服端架構之情境導向內容調適
(Proxy-based context-oriented content adaptation)

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摘要(中)

網際網路的發展帶動資訊大量產生，因而牽引著網頁型態的改變，不再是純文字或圖片為主的內容，而是包含音樂、影片、串流多媒體與同步化機制等新概念。此外，硬體科技的進步，瀏覽網頁內容已不再是只使用桌上型 (desktops) 和膝上型 (laptops) 電腦；是各類型的移動性 (portable) 裝置，如：PDA (Personal Digital Assistant)、智慧型手機 (smart phone) 等被應用於生活之中。因此，能讓使用者在任何時間任何地點獲得適當的網頁內容是目前一個重要的研究課題。
在而無所不在 (ubiquitous) 的情境環境之中，不同的使用者使用各種的裝置讀取網頁內容，會產生出各種不同組合的情境條件，而影響這些組合的因素包含有使用者本身的存取能力 (如：視弱，耳聾)，使用者所處的狀態 (如：在辦公室，會議中，開車中)，異質性平台的裝置 (如：PC，PDA，Mobile Phone)。網頁內容都是針對桌上型電腦的規格製作，並未考慮到移動性 (portable) 裝置的特性，如：低功率計算能力 (lower computing power) 和較小的顯示螢幕，再加上網頁的服務型態不同，會有不同種類的內容 (Html、JSP、ASP、PHP、SMIL…等)。因此，給予符合使用者情境的內容調適將是很大的挑戰。
我們之前的研究當中，提出了 Context-oriented Content Adaptation Framework (CCAF) 概念來達成內容調適的目的。在這篇文章當中，將更進一步提出以代理伺服器為架構的 Context Adaptation Proxy System Architecture (CAProxy-SA) 來實踐情境導向內容調適機制，具體的實作出CCAF中每個概念，進而應用在實際的網頁服務之中。

摘要(英)

With the rapid increase in the amount of information on the Internet development which causes the changing of the webpage type. Nowadays, the content is no longer built by pure texts or pictures, but includes musics, films, streamming, and synchronization mechanism. Besides the improvement of hardwares, browsing Web content is no longer restricted with desktops, and laptop computers. Then all kinds of portable devices are being used in our life, for example, personal digital assistant, and mobile phone. Therefore, it is a very importment subject to research, which gives users a suitable way to get webpage content in anytime and anywhere.
In the ubiquitous context-aware environment, users have various kinds of device to browse Web content that produce different kinds of combination context. The factor influence context, include user’s accessibility (eg: weak-sighted, deaf), situation (eg: office, meeting, driving), and heterogeneity devices (NB, PDA, Mobile phone). Since the contents of webpage are made for desktop computer, it has not considered the characteristic of portable device. For instance: lower computing power, and small display screen. Moreover, the service type of the webpage are different, there are many types of content. Thus, it is a great challenge to offer a suitable context which accords to user’’s situation.
Context-oriented Content Adaptation Framework (CCAF) is proposed to reach the purpose of content adaptation. In this article, we are going to propose proxy based Context Adaptation Proxy System Architecture (CAProxy-SA), which implements the concept of CCAF, and then apply it to the real webpage service.

關鍵字(中)

★ 內容調適
★ 基於代理伺服器
★ 使用者情境
★ 網頁內容

關鍵字(英)

★ Us
★ Web content
★ Content Adaptation
★ Proxy-based

論文目次

摘要 I
Abstract II
誌謝 III
目錄 IV
圖目錄 VI
表目錄 VIII
第一章緒論 1
1.1 研究背景與動機 1
1.2 研究問題描述 4
1.3 研究問題分析 7
1.4 研究相關領域 9
1.5 研究方法 9
1.6 研究貢獻 11
第二章文獻探討 12
2.1 普遍性的問題描述 12
2.1.1 目前研究狀態與挑戰 19
2.1.2 各種解決問題的方法 21
2.2 列舉與描述所有可能解問題的方法 24
2.3相關研究比較 26
2.3.1 優勢、劣勢 26
2.3.2 機會、威脅 27
第三章研究方法 28
3.1 CAgent 29
3.1.1 情境萃取 30
3.1.2 傳送機制 33
3.1.3 更新機制 34
3.2 CAProxy 37
3.2.1 Message Control Management Module 37
3.2.2 Context Management Module 40
3.2.3 Cache Management Module 51
3.2.4 Content Adaptation Management Module 58
第四章系統實作 60
4.1 實作環境 60
4.1.1 硬體與軟體平台 61
4.1.2 實作語言與工具 61
4.2 系統架構 63
4.2.1 高階系統設計與分析 63
4.2.2 低階系統設計與分析 65
4.3 系統展示 80
4.3.1 使用者介面、執行結果、與螢幕列印 80
4.4 實作經驗學習 86
第五章研究評估與討論 87
5.1 實驗設計與設定 87
5.2 量化評估 88
5.2.1 內容呈現功能實驗 88
5.2.2 瀏覽網頁內容存取時間之實驗 91
5.3 質化評估 93
5.3.1 問卷設計與觀察 93
5.3.2 實驗結果與學習 94
第六章研究結論與未來建議 97
參考文獻 98

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指導教授

楊鎮華(Stephen J.H. Yang)

審核日期

2007-7-5

推文