Life Style and Behavior of Internet Radio Audience

In this thesis, we study the broadcast scheduling algorithms in a dynamic environment with set-typed data requests. We sketch the dimensions of broadcasting paradigms and build a family of Wp

Broadcasting is a fundamental primitive in local area networks (LANs).Operations of many data link protocols, for example, ARP (Address Resolution Protocol) and IGMP (Internet Group Management Protocol), must rely on this LAN primitive. To develop the broadcasting service in mobile ad hoc wireless LANs (WLANs) is a challenge. This is because a mobile ad hoc WLAN is a multi-hop wireless network in which messages may travel along several links from the source to the destination via a certain path. Additionally, there is no fixed network topology because of host moving. Furthermore, the broadcast nature of a radio channel makes a packet be transmitted by a node to be able to reach all neighbors. Therefore, the total number of transmissions (forward nodes) is generally used as the cost criterion for broadcasting. The problem of finding the minimum number of forward nodes in a static radio network is NP-complete. Almost all previous works, therefore, for broadcasting in the WLAN are focusing on finding approximation approaches in a, rather than, environment. In this paper, we propose a novel distributed protocol in WLANs to significantly reduce or eliminate the communication overhead in addition to maintaining positions of neighboring nodes. The important features of our proposed protocol are the adaptability to dynamic network topology change and the localized and parameterless behavior. The reduction in communication overhead for broadcasting operation is measured experimentally. From the simulation results, our protocol not only has the similar performance as the approximation approaches in the static network, but also outperforms existing ones in the adaptability to host moving.

Unlike the traditional store-and-forward mechanism in packet-switching networks,network coding schemes could combine and modify the contents of a number of packets from different source before the packets are forwarded.It has been recently shown that network coding techniques can significantly increase the overall throughput of wireless networks by taking advantage of their broadcast nature. In wireless networks,each transmitted packet is broadcasted within a certain area and can be overheard by the neighboring nodes.When a node needs to transmit packets,it employs the coding approach that uses the knowledge of what the node's neighbors have heard in order to reduce the number of transmissions. In this thesis,I propose jointly designing the network coding scheme and the media access control scheme to improve the performance of wireless networks.

Thesis (Ph. D.)--University of Missouri-Columbia, 2001. / Typescript. Vita. Includes bibliographical references (leaves 238-247). Also available on the Internet.

Thesis (Ph. D.)--University of Missouri-Columbia, 2001. / Typescript. Vita. Includes bibliographical references (leaves 238-247). Also available on the Internet.

Paprasčiausias būdas stebėti autosporto lenktynių rezultatus yra internetiniai portalai. Tačiau ir čia Lietuvos autosporto rengėjai nusileidžia pasaulinio lygio automobilių lenktynių rengėjams ir dažnai lenktynių rezultatus pateikia tik pasibaigus lenktynėms. Šio darbo tikslas – sukurti sistemą kurioje būtų galima talpinti ir peržiūrėti šiuo metu vykstančių automobilių sporto lenktynių rezultatus ir įvykius. / In Lithuania there is no such web page which would be easy to access and simply to use for autosport information broadcasting online. Many foreign countries‘ web sites have it, but mostly it is created for specific autorace and is not meant for adaption for other autorace information broadcasting. The aim of this study is to create for system which allows its user to upload current events and results of autorace so autosport fans could follow the race online. System is started to create from specifications of requirements and specifications of architecture of the system which follows with actual creation, improvement and testing of the information system itself. After the program is finished, user‘s guide was written and it helps to install the system and indicates its specifics as well as usage. Information system enables to store racing data, information about it, update the ongoing events, that helps to follow the race and the general information about the race itself.

Research Doctorate - Doctor of Philosophy (PhD) / This thesis investigates the problem of seeking multimodal mid-level representations for semantic analysis of broadcast video. The problem is of interest as humans tend to use high-level semantic concepts when querying and browsing ever increasing multimedia databases, yet generic low-level content metadata available from automated processing deals only with representing perceived content, but not its semantics. Multimodal mid-level representations refer to intermediate representations of multimedia signals that make various kinds of knowledge explicit and that expose various kinds of constraints within the context and knowledge assumed by the analysis system. Semantic multimedia analysis tries to establish the links from the feature descriptors and the syntactic elements to the domain semantics. The goal of this thesis is to devise a mid-level representation framework for detecting semantics from broadcast video, using supervised and data-driven approaches to represent domain knowledge in a manner to facilitate inferencing, i.e., answering the questions asked by higher-level analysis. In our framework, we attempt to address three sub-problems: context-dependent feature extraction, semantic video shot classification, and integration of multimodal cues towards semantic analysis. We propose novel models for the representations of low-level multimedia features. We employ dominant modes in the feature space to characterize color and motion in a nonparametric manner. With the combined use of data-driven mode seeking and supervised learning, we are able to capture contextual information of broadcast video and yield semantic meaningful color and motion features. We present the novel concepts of semantic video shot classes towards an effective approach for reverse engineering of the broadcast video capturing and editing processes. Such concepts link the computational representations of low-level multimedia features with video shot size and the main subject within a shot in the broadcast video stream. The linking, subject to the domain constraints, is achieved by statistical learning. We develop solutions for detecting sports events and classifying commercial spots from broad-cast video streams. This is realized by integrating multiple modalities, in particular the text-based external resources. The alignment across modalities is based on semantic video shot classes. With multimodal mid-level representations, we are able to automatically extract rich semantics from sports programs and commercial spots, with promising accuracies. These findings demonstrate the potential of our framework of constructing mid-level representations to narrow the semantic gap, and it has broad outlook in adapting to new content domains.

Thesis (M,A.)--University of Missouri-Columbia, 2007. / The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on November 12, 2007) Includes bibliographical references.

Thesis (M.F.A.)--Rochester Institute of Technology, 1992. / Typescript. Includes bibliographical references (leaves 37-41).