A switching power amplifier which can be operated as a class D amplifier and a class E amplifier is proposed. The proposed circuit can be operated as a high efficiency soft switching power amplifier at a high operatin...
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ISBN:
(纸本)9781424424900
A switching power amplifier which can be operated as a class D amplifier and a class E amplifier is proposed. The proposed circuit can be operated as a high efficiency soft switching power amplifier at a high operating frequency and it also can be operated as a class D amplifier at a low operating frequency.
Data retention and leakage current reduction are among the major area of concern in today's CMOS technology. In this paper 6T, 8T and 9T SRAM cell have been compared on the basis of read noise margin (RNM), write ...
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In the ubiquitous environment of the next generation, RFID is predicted to occupy an important technical location and also expected to apply to various fields. However, the properties of tags in itself which is the co...
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Positioning technology for realization of Location Based Service (LBS) is being emphasized. For the goal of LBS, 'Seamless LBS', precise positioning results and more appropriate techniques are needed. In this ...
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ISBN:
(纸本)9781605586595
Positioning technology for realization of Location Based Service (LBS) is being emphasized. For the goal of LBS, 'Seamless LBS', precise positioning results and more appropriate techniques are needed. In this paper, IEEE802.11 WLAN which is being extended due to its mobility, portability, and simplicity is considered for positioning. Recently, IEEE802.11 WLAN is getting more popular as the increase of its use at the university, airport, hospital, and public buildings and so on. By using this WLAN, we have studied indoor positioning technique to get reasonable positioning results at the indoor environments. First, we analyzed the signal characteristics of WLAN. After that, the each result applied various positioning algorithms are compared. Lastly, we propose the fusion algorithm to get the enhanced positioning results. Copyright 2009 ACM.
This work presents a variable latency rounding method based on the calculation in parallel of a remainder estimation for Newton-Raphson algorithm. The value obtained is the remainder of the algorithm result without an...
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In order to reduce the peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals over fading channels, the selected mapping (SLM) scheme and channel estimation technique can be us...
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The Stream Control Transmission Protocol (SCTP) is a new transport layer protocol. Multihoming is one of the most important features in SCTP, which can be used by the data sender to send data to a receiver through dif...
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The Rede Telematica da Saude (RTS) is a telematic network connecting health care providers in the Aveiro region (Portugal), aiming at supporting the continuity of care. Using the RTS, health care professionals and ins...
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ISBN:
(纸本)9789898111630
The Rede Telematica da Saude (RTS) is a telematic network connecting health care providers in the Aveiro region (Portugal), aiming at supporting the continuity of care. Using the RTS, health care professionals and institutions can securely share clinical data. RTS makes use of an integration engine, which accesses the scattered data sources to create a virtual unified view of patients' information. RTS is deployed over a wide-area private network, shared among a great variety of bandwidth links, systems and applications, which can impact the infrastructure service levels in multiple ways. In this paper, we describe the development of a toolkit for monitoring the performance of the distributed integration process. These analysis mechanisms make it is possible to detect bottlenecks and introduce optimizations in the system, especially with respect to the integration engine module. Its deployment in the production RTS health telematic network assists the maintenance team and the decision taking process to handle usage trends and systems needs.
Accurate shot change detection plays vital role to organize video contents into meaningful parts for video scene analysis. Shot changes may occur with either abrupt or gradual shot transition. In abrupt shot transitio...
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ISBN:
(纸本)9789944898188
Accurate shot change detection plays vital role to organize video contents into meaningful parts for video scene analysis. Shot changes may occur with either abrupt or gradual shot transition. In abrupt shot transition, the change of video content occurs over a single frame. In gradual shot transition, however, the content change takes place gradually through a short sequence of frames. The gradual transition is also divided into several subgroups such as dissolve, pan, zoom and wipe. In the literature, there exist numerous methods to detect shot changes. While these methods are able to detect abrupt changes properly, they usually fail to detect gradual changes. This paper proposes a new method for detecting gradual shot changes successfully. The proposed method employs fractal dimension information of gray scale video frames. In the experimental work, efficacy of fractal based gradual shot change detection method is tested on soccer videos including different types of gradual shot changes and compared with well known pixel and histogram based shot change detection methods. Results of the experimental study indicate that the proposed method yields higher accuracy with respect to other methods in most cases.
In this paper, we present OA-TDMA (OLSR-Aware TDMA), a TDMA based cross-layer channel access scheduling scheme which uses the information collected by the OLSR routing protocol. In OA-TDMA, each node makes decisions i...
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