Uttam K. Sarkar

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All traffic models for MPEG-like encoded variable bit rate (VBR) video can be broadly categorized into 1) data-rate models (DRMs) and 2) frame-size models (FSMs). Almost all proposed VBR traffic models are DRMs. DRMs generate <i>only</i> data arrival rate, and are good for estimating average packet-loss and ATM buffer overflowing probabilities, but fail to(More)
Texture and temporal variations in scenes, and peculiarities of MPEG compression algorithms result in very complex frame-size data sets for any long-duration variable bit rate (VBR) video. A major hurdle in capturing the statistical behavior of such a data trace can be removed by segmentation of all frames into an appropriate number of analytically(More)
— A Video on Demand (VoD) system is expected to transmit many movies over a single channel as demanded by the end users. When several videos are transmitted simultaneously over a link the effective bandwidth required per video is usually much lower than that needed by a single video because of multiplexing gain. Fast and accurate estimation of multiplexing(More)
Real-time variable bit rate (VBR) video is increasingly dominating the bandwidth use of broadband networks. Many videos can be simultaneously transmitted over a channel in a broadband network. Given the usual capacities of communication links in use for transmission , the number of videos simultaneously transmitted over a broadband communication link for(More)
MPEG-encoded variable bit rate (VBR) video traffic is expected to incur cell losses during its transmission over a broadband network. These cell losses introduce distortion into the received video. Frame drop rate and Root Mean Square Error (RMSE) can be used to objectively measure this distortion. These two metrics are useful in identifying the threshold(More)
The river Ganges is the largest river in India and the fifth longest in the world. Although, many studies on fish ecology and systematic have been conducted largely to improve fisheries but fish diversity and their distribution pattern from conservation point of view have never been adequately addressed in the Ganges. In this connection, current(More)
Effects of local habitat variables on the structure of fish assemblage were evaluated from 50 sampling sites in a tropical River of Central India of the Ganges basin with limited anthropogenic disturbance covering premonsoon, monsoon and postmonsoon periods. Data were analyzed for 5,186 fish individuals of 24 freshwater fish species of conservation and(More)
The captive breeding of butter catfish (Ompok bimaculatus, Bloch 1794), a threatened silurid of Indian sub-continent was successfully carried out at the National Bureau of Fish Genetic Resources, Lucknow. Ten induced breeding trials conducted on the fish revealed that the fish can be naturally spawned in controlled conditions using sGnRH analogue and(More)
In this paper we propose a novel method for associating Wireless Mobile Nodes&#x0A0;&#x0A0;(WMNs) to Access Points (APs) in busy wireless access networks. The proposed method associates each WMN with multiple APs for mitigating the load balancing problem in hot-spots. The method assumes that a concurrent multipath transport control protocol such as cmpTCP(More)