B. Gupta

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A DVB-S2 compliant codec is implemented in both 130nm-8M and 90nm-7M low-leakage CMOS technologies. The system includes encoders and decoders for both Low-Density Parity Check (LDPC) codes and serially concatenated BCH codes. All requirements of the DVB-S2 standard are supported including code rates between 1/4 and 9/10, block sizes of either 16,200 bits or(More)
In this paper, we have proposed two recovery algorithms for distributed systems. Both algorithms follow a revolving centralized scheme. The direct dependency tracking of an integer representing the number of messages sent by each process has been shown to be sufficient to determine the maximum consistent state. The main feature of the recovery algorithms is(More)
In this paper we present a new fault-tolerant di-the nodea of the network, which communicate among themselves by exchanging messages only. We have shown that our algorithm functions properly when any of the cooperating nodes in the system fails. The communication delay may vary but haa an upper limit of A time units and the messages are not guaranteed to be(More)
The effects of Zn deficiency on antioxidant responses of two pea (Pisum sativum L.) genotypes, a Zn-efficient IPFD-99-13 and Zn-inefficient KPMR-500, grown in sand culture were studied. In the pea genotype KPMR-500, Zn deficiency decreased dry matter yield, tissue Zn concentration, and antioxidant enzyme activities istronger than in the genotype IPFD-99-13.(More)
Colorectal cancer (CRC) is one of the most common solid tumors worldwide. Recent evidence suggests that a population of cancer cells, called cancer stem cells (CSCs), is responsible for tumor heterogeneity, invasion, metastasis, therapeutic resistance, and recurrence of CRC. The isolation and characterization of CSCs using cell surface markers have been(More)
8 In this paper we introduce a new histogram equalization based contrast enhancement method called High Speed Quantile Based Histogram Equalization (HSQHE) suitable for high contrast digital images. The proposed method is an effective tool to deal with the " mean-shift " problem, which is a usual problem with the histogram equalization based contrast(More)