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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.
Uplift capacity of horizontal anchor plate embedded near to the cohesionless slope by limit analysis
Bhattacharya, Paramita,Sahoo, Sagarika Techno-Press 2017 Geomechanics & engineering Vol.13 No.4
The effect of nearby cohesionless sloping ground on the uplift capacity of horizontal strip plate anchor embedded in sand deposit with horizontal ground surface has been studied numerically. The numerical analysis has been carried out by using the lower bound theorem of limit analysis with finite elements and linear optimization. The results have been presented in the form of non-dimensional uplift capacity factor of anchor plate by changing its distance from the slope crest for different slope angles, embedment ratios and angles of soil internal friction. It has been found that the decrease in horizontal distance between the edge of the anchor plate and the slope crest causes a continuous decrease in uplift capacity of anchor plate. The optimum distance is that distance between slope crest and anchor plate below which uplift capacity of an anchor plate has been found to decrease with a decrease in normalized crest distance from the anchor plate in presence of nearby sloping ground. The normalized optimum distance between the slope crest and the anchor plate has been found to increase with an increase in slope angle, embedment ratio and soil internal friction angle.
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.
DNA barcoding to fishes: current status and future directions
Bhattacharya, Manojit,Sharma, Ashish Ranjan,Patra, Bidhan Chandra,Sharma, Garima,Seo, Eun-Min,Nam, Ju-Suk,Chakraborty, Chiranjib,Lee, Sang-Soo Informa UK (Informa Healthcare) 2016 Mitochondrial DNA. Part A Vol.27 No.4
<P>DNA barcoding appears to be a promising approach for taxonomic identification, characterization, and discovery of newer species, facilitating biodiversity studies. It helps researchers to appreciate genetic and evolutionary associations by collection of molecular, morphological, and distributional data. Fish DNA barcoding, based on the sequencing of a uniform area of Cytochrome C Oxidase type I (COI) gene, has received significant interest as an accurate tool for species identification, authentication, and phylogenetic analysis. The aim of this review article was to investigate recent global status, approaches, and future direction of DNA barcoding in fisheries sectors. We have tried to highlight its possible impacts, complications, and validation issues at species levels for biodiversity analysis. Moreover, an effort has been put forward to understand issues related to various marker genes associated with barcode process as primer sequences and have concluded barcode promotion as an indispensable tool of molecular biology for the development of taxonomic support systems.</P>
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.