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研究生:林傳凱
研究生(外文):Chuan-Kai Lin
論文名稱:脈絡感知資料管理系統之設計與實作
論文名稱(外文):The Design and Implementation of a Context-Aware Data Management System
指導教授:雷欽隆雷欽隆引用關係
指導教授(外文):Chin-Laung Lei
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:電機工程學研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2004
畢業學年度:92
語文別:英文
論文頁數:48
中文關鍵詞:資料管理脈絡
外文關鍵詞:contextcontext-aware
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可錄製多媒體影音檔案的消費性電子商品正以飛快的速度成長,隨處可見人手一臺數位相機,數位攝影機和數位錄音筆,使用者得以利用這些裝置來隨時隨地記錄日常生活的點點滴滴。隨著影音資料檔案日積月累的成長,如何有效管理這些檔案變成了煩瑣的問題。假設使用者想要找出關於某人的照片,那他可能得逐一瀏覽硬碟中所有的照片。利用拍攝時的脈絡 (context) 資訊做為鍵值可以增進搜尋的效率。這些脈絡資訊包含拍攝時附近使用者的身份,攝影機的地理位置,日期及拍攝者的身份。這些資料可用來註解影音檔以利日後的搜尋。利個人數位助理 (PDA) 來模擬數位相機以實作脈絡感知資料管理系統實現了上述的概念並且提供發展相關應用程式的基礎。
The rapid growing popularity of consumer electronics capable of recording multimedia data, such as digital camera, audio recorder or digital video recorder, has brought people the joy of recording their daily life anywhere and anytime. However, the management of the vast amount of audio/video file is extremely laboring. For example, in order to find all the pictures relating to someone, the user has to browse all of the pictures in his hard disk. To facilitate the search operation, the context-based search technique is developed using context information collected at the instant when the picture is taken as search keys. The context information consists of the identification of nearby people, the geographical location of the camcorder, the date and the identification of the photographer. Since every picture the user taken is annotated with specific context information, searching for the pictures relating to someone, some location and some time span would be easier and more efficient. It is a pity that current digital cameras cannot tag such context information and embed it into the image file. So the Context-Aware Data Management System is designed and implemented on a personal digital assistant (PDA) as a substitute of digital camera to demonstrate how to leverage the novel features of the system to build applications. It will be an attracting feature if consumer electronics manufacturers can integrated this technique into their digital camera products.
Chapter 1 Introduction 1
1.1 Context Awareness 2
1.2 Enabling Technology 3
1.3 CADMS Architecture Overview 4

Chapter 2 Technology Overview 8
2.1 Automatic Identification and RFID 9
2.1.1 RFID System Components 9
2.1.2 Transponder 10
2.1.3 RFID Reader 12
2.1.4 RFID Wireless Communication 13
2.2 Wireless Communication 14
2.2.1 Bluetooth 15
2.3 Localization 20
2.3.1 Location Sensing Techniques 20
2.3.2 Location Systems 22

Chapter 3 Context Awareness 26
3.1 Context 27
3.2 Context Awareness 28
3.3 Context-Aware Applications 28

Chapter 4 CADMS Design Concept and Architecture
32
4.1 Problem Description 32
4.2 CADMS Design Goals 33
4.3 From Content-based to Context-based Information Retrieval 34
4.4 The Context Sensing of CADMS 36
4.5 CADMS Components and Architecture 37
Chapter 5 CADMS System Implementation and Experiment Result 40
5.1 Implementation 40
5.2 Experiment Result 41
Chapter 6 Conclusion 44
Reference 46
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[19]M. Youssef, A. Agrawala and A. U. Shankar. “WLAN Location Determination via Clustering and Probability Distributions.” IEEE International Conference on Pervasive Computing and Communications (PerCom) 2003.
[20]W. Zhao, R. Chellappa, A. Rosenfeld and P.J. Phillips. “Face Recognition: A Literature Survey.” Technical Report, CS-TR4167, Univ. of Maryland, 2000.
[21]www.aimglobal.org, URL: http://www.aimglobal.org/technologies/
[22]Bluetooth Core Specification v1.2. November, 2003.
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