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.

Response to “Adult Immunization Policy in Korea”

Bhattacharya Sudip,Bhattacharya Sandip 대한감염학회 2024 Infection and Chemotherapy Vol.56 No.1

Response to A Korean Post-Marketing Study of Abacavir/Dolutegravir/Lamivudine in Patients with HIV-1

Bhattacharya Sudip,Bhattacharya Sandip 대한감염학회 2024 Infection and Chemotherapy Vol.56 No.1

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.

Does inefficiency influence earnings management through discretionary loan loss provisions? Evidence from Indian banks

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.

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.

Hazard and Near-Miss Reporting – An Analysis of The Effectiveness of Increased Error Reporting

Bhattacharya, Yogendra 국제이네비해양경제학회 2020 International Journal of e-Navigation and Maritime Vol.15 No.1

Contemporary safety literature recognizes that error reporting - reporting of hazards, near-misses and incidents is important in the development of safety in high risk industries such as shipping - where the success of such reporting programs has been limited. Reporting is integral to the concept of “continuous improvement” as envisaged by the International Safety Management Code. However, shipping - like other industries - suffers from considerable under-reporting. At the same time, many Safety managers find positive correlation between numbers of such reports and shipboard safety, and to encourage reporting, many follow a mandatory reporting system. This study attempted to understand whether increasing numbers of submitted error reports does result in a consequent decrease in incidents/accidents, thereby validating this premise. The study was limited to the fleet of only one shipping company, and to the quantitative analysis of the error reports; not the content or quality of such reports. To achieve this, annual compiled error reports from across all fleet vessels of one shipping company were collected. This company had made a significant increase in the numbers of reports to be submitted by vessels in its fleet thereby presenting this opportunity. These reports were analyzed using Pearson correlation to determine any statistically significant correlations between numbers of hazards and near-misses reported, and recorded incidents/accidents. Analysis of the data showed that, from a quantitative point of view, the mandated increase in the number of reports did not result in a decrease in the numbers of near misses or incidents/accidents. It was concluded that merely increasing the number of reports may not improve safety performance, but may lead to the submission of reports just to meet requirements thereby devaluing the entire process. Companies should look at more effective ways through which the safety culture can be enhanced and improve on-board safety performance.

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>

Bayesian Analysis of GLEM with Half-Normal Prior

Bhattacharya, Samir K.,Lal, Ram The Korean Statistical Society 1985 Journal of the Korean Statistical Society Vol.14 No.2

In this paper, Bayesian analysiss of the general linear econometric model is carried out by using a multinomal prior for the vector of unknown regression coefficents and a half-normal prior for the standard deviation of the disturbances.

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>