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Negative Exponential Disparity Based Robust Estimates of Ordered Means in Normal Models
Bhattacharya, Bhaskar,Sarkar, Sahadeb,Jeong, Dong-Bin The Korean Statistical Society 2000 Communications for statistical applications and me Vol.7 No.2
Lindsay (1994) and Basu et al (1997) show that another density-based distance called the negative exponential disparity (NED) is an excellent competitor to the Hellinger distance (HD) in generating an asymptotically fully efficient and robust estimator. Bhattacharya and Basu (1996) consider estimation of the locations of several normal populations when an order relation between them is known to be true. They empirically show that the robust HD based weighted likelihood estimators compare favorably with the M-estimators based on Huber's $\psi$ function, the Gastworth estimator, and the trimmed mean estimator. In this paper we investigate the performance of the weighted likelihood estimator based on the NED as a robust alternative relative to that based on the HD. The NED based estimator is found to be quite competitive in the settings considered by Bhattacharya and Basu.
Mechanism of Lipid Induced Insulin Resistance: An Overview
Samir Bhattacharya,Rakesh Kundu,Suman Dasgupta,Sushmita Bhattacharya 대한내분비학회 2012 Endocrinology and metabolism Vol.27 No.1
Type 2 diabetes (T2D) is rapidly spreading throughout the world. It’s an insidious disease and still treated in an indirect manner without having specific drug target. In majority cases T2D is treated with drugs that address type 1 diabetes, majority of drugs aim to increase insulin release although the root cause for T2D is not the dearth of insulin release, it occurs in the later stage of disease development. T2D silently progressed in the patient; it begins with insulin resistance that takes place due to the loss of insulin sensitivity. Though insulin resistance is the centre of pathogenesis, our treatment of the disease has not yet addressed it. It is now a fact that insulin resistance is manifested by lipid and fatty acids (FAs) play a critical role in blunting insulin sensitivity. Our understanding is still poor in deciphering how lipid impose insulin insensitivity, majority of workers suggest it is because of insulin signaling defects which implements insulin function in inhibiting glucose to the cell from circulation. Number of long chain saturated FA has been shown to produce insulin signaling defects. However, we really need further investigation to find specific target(s) for FA induced damage. In addition to these information, a new dimension of T2D is getting attractive is fetuin-A/α2-Heremans-Schmid Glycoprotein,a secretary protein from liver. Its gene locus has been identified as T2D susceptible. Fetuin-A’s excess expression occurs by FA and it disrupts adipocyte function. It has been shown to be associated with T2D especially in obesity. In this review, we briefly discuss the present status on the mechanistic understanding of lipid induced insulin resistance that leads to T2D. More we understand the mechanism; opportunity to fight the battle with T2D will be increasing. Since, this field is now vast; we covered a few major events.
Sarit Biswas,Mousumi Bhattacharya,Sharad Nath Bhattacharya,Sharad Nath Bhattacharya 한양대학교 경제연구소 2022 JOURNAL OF ECONOMIC RESEARCH Vol.27 No.2
The research looks into the impact of efficiency on discretionary loan loss provisioning in Indian banks and whether government ownership of commercial banks impacts efficiency. Using data envelopment analysis to quantify efficiency, we investigate the effect of efficiency on discretionary loan loss provision using a two-stage least squares regression model while accounting for uncertain government policies and their unpredictable economic consequences (economic policy uncertainty). Banks that are not majority owned by the government are more efficient than banks that are majority owned by the government. Through discretionary loan loss provision, bank efficiency positively impacts earnings management. Bank earnings management practices are limited by economic growth, rising credit-to-deposit ratios, and domestic economic policy uncertainties. However, capital adequacy ratio and global economic policy uncertainties are positively related to earnings management in banks. The study provides insights into the link between efficiency and earnings management in the face of local and global uncertainties.
OPTOELECTRONIC INTEGRATED CIRCUITS FOR PHOTORECEIVERS AND COMMUNICATION SYSTEMS
Bhattacharya, Pallab 대한전자공학회 1989 ICVC : International Conference on VLSI and CAD Vol.1 No.1
Optoelectronic Integrated Circuits (OEICs), circuits that monolithically integrate lasers or photodetectors with electron components on a single semiconductor chip, are a device technology with the potential to meet a broad range of future telecommunications and computer system needs. As for the case of integrated electronics, monolithic integration of optical and electrical devices offers significant advantages over hybrid circuits in compactness and reliability, as well as for potential reduction in cost and for possible performance improvements resulting from reduced parasitics. In this paper I describe our work on monolithically integrated photoreceivers which use HEMTs, SISFETs, APDs and Camel diodes as components. I will also describe a monolithically integrated MQW bipolar optoelectronic switch and integration on optical fiber surfaces made by MBE and ex-situ processing.
PEST MANAGEMENT OF TWO NON-INTERACTING PESTS IN PRESENCE OF COMMON PREDATOR
Bhattacharya, D.K.,Karan, S. 한국전산응용수학회 2003 Journal of applied mathematics & informatics Vol.13 No.1
The paper considers two mutually independent pests in presence of their common predator and discusses their control biologically by release of additional predators and chemically by using non-selective non-residual pesticide. It also verifies the results by special choice of parameters.
Bhattacharya, Pallab,Joo, Taigyu,Kota, Manikantan,Park, Ho Seok Elsevier 2018 Ceramics international Vol.44 No.1
<P><B>Abstract</B></P> <P>The integration of pseudocapacitive metal oxides with reduced graphene oxide (RGO) is considered an innovative chemical strategy to resolve both bottlenecks of pseudocapacitor and electrical double-layer capacitor for high performance supercapacitors. Herein, we report a facile synthesis method of highly porous three-dimensional (3D) CoO/RGO nanocomposite via ozone treatment, ice templating, and thermal annealing. The ozonized RGO surface provides a favorable interaction with cobalt precursor for a stable and uniform deposition of well-defined CoO nanoparticles. The morphology, structure, and chemistry of the resulting CoO/RGO nanocomposites are comprehensively characterized by spectroscopic methods. The CoO/RGO nanocomposites show fast and reversible pseudocapacitance due to a large accessible area, rapid ion transport, and low charge transfer resistance arising from 3D internetworked macroporosity. Thus, the nanocomposites achieve high specific capacitance up to 239.4Fg<SUP>-1</SUP> (volumetric capacitance = 12.04Fcm<SUP>-3</SUP>), excellent rate capability of 79.1%, and ultralong cyclic stabilities (of 93.2% at 10Ag<SUP>-1</SUP> even up to 10,000 cycles) in 6M KOH electrolyte. This simple synthesis method offers a promising solution for the design of high performance hybrid energy storage materials consisting of high capacity metal oxides and conductive graphene networks.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>