1,720,962 research outputs found
On Controlling Digital TV Set-Top-Box by Mobile Devices via IP Network
No full text台灣預計在2010年，將會全面回收傳統類比電視，取而代之的是數位電視。數位電視不再像傳統類比電視只允許使用者單方向收看電視內容，數位電視系統架構允許使用者在數位電視機上盒執行應用程式，使用者透過應用程式將可以與傳播業者甚至其他使用者達成雙向互動。但是目前使用者唯一與數位電視機上盒溝通的裝置只有搖控器，而搖控器傳輸的範圍十分有限。在本篇論文中，我們提出了一個系統，將搖控器的功能拓展到行動裝置，包括行動電話，筆記型電腦與口袋型個人電腦。為了符合未來的標準，在數位電視機上盒我們採用「多媒體家庭平台」做為我們的「中介軟體」。伺服器端與使用者端的程式則以Java程式語言實作。我們的系統提供了兩個服務，一個是線上觀看目前數位電視播放的內容，另一個是由使用者傳送命令給數位機上盒，將目前播放的節目錄下來。我們假設未來家中將會有一個「個人多媒體伺服器」，這個伺服器在我們的系統中負責將數位電視內容做「轉碼」並且廣播到網路，同時也扮演「網頁伺服器」的角色。使用者可以用手機透過GPRS連線到「多媒體家庭平台」伺服器，或者以瀏覽網頁的方式，而「網頁伺服器」將以第三者的身份代替使用者與「多媒體家庭平台」伺服器溝通。Traditional analogue TVs are expected to be replaced by digital TVs in the very near future. Unlike the traditional TV system, the digital TV architecture allows users to execute application programs in their set-top-boxes. One of the benefits is that users can communicate interactively with their broadcasters or even other subscribers by executing certain programs via some channels, e.g. The Internet. However, the only input device for users is the remote controller, which has rather limited transmission range. In this thesis, we propose a system that allows mobile devices, e.g. mobile phones, laptops and PocketPCs, to control set-top-box. For future compatibilities, we adopt MHP (Multimedia Home Platform) as our middleware in the set-top-box. Server programs and client programs are implemented by Java. Our system provides two services: one is to view the digital contents online; and the other is for users to command MHP server to record a TV program. We assume that in the future inside every house there will be a “Personal Multimedia Server”. This server serves the functions of transcoding DTV contents to video streaming data and broadcasting to the Internet. Also, it plays the role as web server. Users can connect to the MHP server by mobile phones via GPRS. They can also let the web server be the third party to communicate with the MHP server by browsing the web site.Abstract ii
Acknowledgement iii
Table of Contents iv
List of Figures vi
Chapter 1 Introduction 1
1.1 Digital TV 1
1.2 Related Works 5
Chapter 2 Preliminaries 8
2.1 Digital Video Broadcasting 8
2.2 Multimedia Home Platform 10
2.3 Electronic Program Guide 13
Chapter 3 System Architecture 14
3.1 User Interface 16
3.2 Remote Control: Recording 17
3.2.1 MHP Server 18
3.2.2 Web Server 18
3.2.3 Client: Mobile Devices with Browser 18
3.2.4 Client: Mobile Phones 19
3.3 Live Broadcasting 20
3.3.1 Microsoft Media Encoder 20
3.4 Combination of 2 sub-systems 21
Chapter 4 Implementation 23
4.1 MHP Server 24
4.1.1 Irt MHP Reference Implementation 24
4.1.2 Command Types 24
4.1.3 Recording 26
4.2 MHP Client 27
4.2.1 MHP Client for Mobile Phones 27
4.2.2 MHP Client for Mobile Devices with Browser 28
4.3 Web Server 30
4.3.1 Embed a Java Program to Web Page 30
4.3.2 Embed a Media Player to Web Page 30
4.3.3 Message Bar 31
4.4 Microsoft Media Encoder 9 Series 32
Chapter 5 Experimental Results 34
5.1 Experimental Results of Mobile Phone 34
5.2 Experimental Results of Laptop 40
5.3 Memory Consumption 43
Chapter 6 Conclusion and Future Works 45
Bibliography 4
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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