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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.
Bhattacharya, A.,Kaliwal, B.B. Korean Society of Sericultural Science 2004 International Journal of Industrial Entomology Vol.9 No.1
Oral supplementation with potassium permanganate (30, 50 and 100 $\mu\textrm{g}$) to fifth instar larvae of the ${CSR_2}{\times}{CSR_4}$ race of the silkworm, B. mori resulted in a significant increase in the glycogen content of the fat body and haemolymph trehalose. The protein content of the fat body is also significantly increased in all the potassium permanganate treated groups where as that of the haemolymph is significantly increased only in the 30 ${\mu}g4 fed group. The total lipids content of the fat body increased significantly in all the potassium permanganate treated groups. This indicates that the potassium permanganate may stimulate metabolic activity, there by influencing the biochemical contents in the fat body and haemolymph of the silkworm, B. mori.
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,Kota, Manikantan,Suh, Dong Hoon,Roh, Kwang Chul,Park, Ho Seok Wiley Blackwell (John Wiley Sons) 2017 ADVANCED ENERGY MATERIALS Vol.7 No.17
<P>It is crucial to control the structure and composition of composite anode materials to enhance the cell performance of such anode materials for lithium ion batteries. Herein, a biomimetic strategy is demonstrated for the design of high performance anode materials, inspired by the structural characteristics and working principles of sticky spider-webs. Hierarchically porous, sticky, spider-web-like multiwall carbon nanotube (MWCNT) networks are prepared through a process involving ozonation, ice-templating assembly, and thermal treatment, thereby integrating the networks with gamma-Fe2O3 particles. The spider-web-like MWCNT/gamma-Fe2O3 composite network not only traps the active gamma-Fe2O3 materials tightly but also provides fast charge transport through the 3D internetworked pathways and the mechanical integrity. Consequently, the composite web shows a high capacity of similar to 822 mA h g(-1) at 0.05 A g(-1), fast rate capability with similar to 72.3% retention at rates from 0.05 to 1 A g(-1), and excellent cycling stability of > 88% capacity retention after 310 cycles with a Coulombic efficiency > 99%. These remarkable electrochemical performances are attributed to the complementarity of the 3D spider-web-like structure with the strong attachment of gamma-Fe2O3 particles on the sticky surface. This synthetic strategy offers an environmentally safe, simple, and cost-effective avenue for the biomimetic design of high performance energy storage materials.</P>
Bhattacharya Gourab,Das Sayan,Venimadhav A. 한국물리학회 2023 Current Applied Physics Vol.49 No.-
In this work, we report for the first time, the effect of adding ZnO nanoparticles, and NdCl3(6H2O) into solution cast Poly (vinylidene fluoride) (PVDF) films, and the interplay of these two different types of additives giving rise to unique multifunctional properties. Rather than the dominance of a single type of additive, a balanced amount of ZnO and NdCl3(6H2O) enhanced the crystallinity, electroactive phase formation, dielectric, ferroelectric and piezoelectric properties of the films. These enhanced properties of the film, having the optimum amount of both the additives, have been utilized to fabricate a device capable of harvesting electrical energy from different body movements though the enhanced electroactive nature of the thin film. A very low cost flexible piezoelectric energy harvester has been prepared from the optimized film. The device shows excellent periodic performance under several human body imparted forces like finger tapping, toe pressing etc. The maximum open circuit voltage was obtained to be 5.9 V and short circuit current was obtained to be 0.36 μA resulting in a power density of 0.35 μW/cm2 against periodic human finger tapping. The device has been observed to be sensitive to other body movements and also has been proven to be efficient for extracting power from different body movements.