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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.
Ageing and temperature-dependent behaviour of CdS nanoparticles
Bhattacharya, Bhaskar,Tomar, Sandeep Kumar,Saxena, Amit,Lee, Jun Young,Park, Jung-Ki WILEY-VCH Verlag 2009 Physica Status Solidi. B Vol.246 No.4
<P>Nanoparticles of inorganic semiconductors in the form of colloids have attracted researchers due to their interesting optical properties. We report the process of the controlled coalescence of the nanoparticles in a colloid with time and also with temperature. Cadmium sulfide (CdS) nanoparticles were prepared in ethylene glycol (EG). The size of the particles was estimated by X-ray diffraction and transmission electron microscopy and matched with the optical absorption data. The particles in the EG matrix were subjected to controlled annealing and the shift in the absorption edge towards its bulk value (∼2.4 eV) was monitored. The change in the band-gap value has been used to calculate the increasing particle radii using the effective-mass model. A similar effect is also reported with ageing of these particulates. (© 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)</P>
Utilization of coal ash: Is vermitechnology a sustainable avenue?
Bhattacharya, S.S.,Kim, K.H. Elsevier Science 2016 RENEWABLE & SUSTAINABLE ENERGY REVIEWS Vol.58 No.-
Although various alternative energy sources have been introduced from time to time, the dependence on coal has not yet been altered significantly. Large quantities of coal ash (CA) are produced due to the combustion of pulverized coal in power plants and other industrial units. Some CAs have relatively high content of essential nutrients and water retention capacity (due to high porosity) which should add their potential for agricultural and several engineering applications. However, as hazardous components (like heavy metals, polycyclic aromatic hydrocarbons, and polychlorinated biphenyls) are preferentially entrapped in the finer proportion, a number of judicious solutions such as vermitechnology have been proposed to resolve those problems. Earthworms are demonstrated to be potent enough to treat various solid wastes. This review emphasized various aspects of hazardous contamination and beneficial role of vermitechnology for sustainable utilization of CA. Furthermore, we reviewed earthworm biology to signify its response toward soil contamination.
A survey of adaptation techniques in computation offloading
Bhattacharya, A.,De, P. Academic Press 2017 JOURNAL OF NETWORK AND COMPUTER APPLICATIONS - Vol.78 No.-
<P>Computation offloading is a method of saving energy and time on resource-constrained mobile devices by executing some tasks on the cloud. A computation offloading mechanism determines portions of the application that can be offloaded for remote execution. The offloading decision problem depends on various parameters, like application characteristics, network conditions, hardware features, that influence the operating environment of an offloading system. Variations in these parameter values make it challenging to design effective offloading solutions that can adapt gracefully to all the changes. Hence a number of work has focused on offloading solutions that can adapt to changes in the parameter values. In this paper, we survey adaptation techniques used by offloading systems. We provide a panoptic view of the task offloading problem by identifying the variable parameters in the offloading ecosystem, present offloading solutions that adapt to these parameters, and point out the associated improvements in Quality of Experience of users.</P>
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.