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Bhushan, Shashi,Pandey, Abhay Pratap The Korean Statistical Society 2019 Communications for statistical applications and me Vol.26 No.4
We propose new classes of estimators of population mean under non-response using bivariate auxiliary information. Some improved regression (or difference) type estimators have been proposed in four different situations of non response along with their properties and the expressions for the bias and mean square errors of the proposed estimators are derived under double (two-stage) sampling scheme. The properties of the suggested class of estimators are studied and it is observed that the proposed estimators performed better when compared to conventional estimators proposed by Singh and Kumar (Journal of Statistical Planning and Inference, 140, 2536-2550, 2010b), Shabbir and Khan (Communications in Statistics - Theory and Methods, 42, 4127-4145, 2013) and Bhushan and Naqvi (Journal of Statistics and Management Systems, 18, 573-602, 2015). A comparative study is also conducted both theoretically as well as empirically in order to support the results.
Bhushan, Shiv,Sarangi, Santunu,Gopi, Krishna Saramekala,Santra, Abirmoya,Dubey, Sarvesh,Tiwari, Pramod Kumar The Institute of Electronics and Information Engin 2013 Journal of semiconductor technology and science Vol.13 No.4
In this paper, an analytical threshold voltage model is developed for a short-channel double-material-gate (DMG) strained-silicon (s-Si) on silicon-germanium ($Si_{1-X}Ge_X$) MOSFET structure. The proposed threshold voltage model is based on the so called virtual-cathode potential formulation. The virtual-cathode potential is taken as minimum channel potential along the transverse direction of the channel and is derived from two-dimensional (2D) potential distribution of channel region. The 2D channel potential is formulated by solving the 2D Poisson's equation with suitable boundary conditions in both the strained-Si layer and relaxed $Si_{1-X}Ge_X$ layer. The effects of a number of device parameters like the Ge mole fraction, Si film thickness and gate-length ratio have been considered on threshold voltage. Further, the drain induced barrier lowering (DIBL) has also been analyzed for gate-length ratio and amount of strain variations. The validity of the present 2D analytical model is verified with ATLAS$^{TM}$, a 2D device simulator from Silvaco Inc.
Instability in in vitro fruiting of Cordyceps militaris
Bhushan Shrestha,Young-Jin Park,Sang-Kuk Han,Sung-Keun Choi,Jae-Mo Sung 한국버섯학회 2004 한국버섯학회지 Vol.2 No.3
Traditionally, Cordyceps species have been used as a part of herbal medicine in Oriental countries, including Korea for internal health, vigor and to cure different diseases related to heart, lung etc. In recent years, research on artificial fruiting of some species of the genus Cordyceps including C. militaris has been carried out extensively because of their medicinal value. Instability observed in the in vitro fruiting of C. militaris is reported in the present study.
Transient Flow of Gas-steam Mixture in a Canister
Bhushan A. Bhosale,Seong Hun Bae,Hyuk Soo Jeon,Chul Hyun Park,Jeong Soo Kim 한국추진공학회 2016 한국추진공학회 학술대회논문집 Vol.2016 No.5
The main purpose of this research work is to analyze the complicated three-dimensional flow structure created by the hot jet impingement on the canister walls. The three-dimensional flow features inside the canister caused by compressible flow were examined and numerically simulated by solving two-equation SST turbulence model with the combination of discrete phase model. In this simulation the working fluid consists a mixture of water vapour and air. The accumulation of this mixture inside a canister develops into the pressurization which may cause missile to lift and force it out from the canister. The entrance of this mixture inclines to the canister at an angle of 45° to prevent the direct jet-impinging on the sidewalls. The computational results with the turbulence models mentioned fairly well predict the pressure, velocity and temperature distribution in the canister.
Bhushan Shrestha,Jae-Gu Han,Junsang Oh,Jae-Gwang Park,Jiyoung Kim,Kang-Hyo Lee,Sung Yuel Hong,Gi-Ho Sung 한국버섯학회 2014 버섯 Vol.18 No.2
Cordyceps species (Cordycipitaceae, Hypocreales) were previously mentioned under dominant genera such as basidiomycetous Clavaria Vaill. ex L. and ascomycetous Sphaeria Haller. Cordyceps Fr. was coined by Fries (1818) from a combination of a Greek word cordyle, meaning a club, and a Latin word caput, meaning a head. Cordyceps was, however, ranked at tribal level under Sphaeria by Fries (1823). Link (1833) later re-elevated Cordyceps to genus level. As a result, there was variation on author citation of Cordyceps in different botanical codes such as Cordyceps (E. M. Fries) Link (1833), Cordyceps E. M. Fries (1818) and Cordyceps Fr. (1824). In 19th and 20th centuries, more and more species were described, with necessity to divide Cordyceps into subgenera, sections and subsections based on morphological similarities. Recent molecular phylogenetic studies, however, showed that Cordyceps is polyphyletic and its members are dispersed in various clades within Hypocreales. As a consequence, Cordyceps was amended in strict sense by Sung et al. (2007) and distantly related clades were named under separate genera. Here, we review recent nomenclatural changes of Cordyceps-related fungi in light of recent changes in the International Code of Nomenclature for algae, fungi, and plants (ICN).