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Kushwaha, Alok,Pandey, Manoj K.,Pandey, Sujata,Gupta, Anil K. The Institute of Electronics and Information Engin 2007 Journal of semiconductor technology and science Vol.7 No.2
A new two-dimensional analytical model for dual-material double-gate fully-depleted SOI MOSFET with Pearson-IV type Doping Distribution is presented. An investigation of electrical MOSFET parameters i.e. drain current, transconductance, channel resistance and device capacitance in DM DG FD SOI MOSFET is carried out with Pearson-IV type doping distribution as it is essential to establish proper profiles to get the optimum performance of the device. These parameters are categorically derived keeping view of potential at the center (${\phi}_c$) of the double gate SOI MOSFET as it is more sensitive than the potential at the surface (${\phi}_s$). The proposed structure is such that the work function of the gate material (both sides) near the source is higher than the one near the drain. This work demonstrates the benefits of high performance proposed structure over their single material gate counterparts. The results predicted by the model are compared with those obtained by 2D device simulator ATLAS to verify the accuracy of the proposed model.
Kushwaha, Upendra,Joshi, Bhuwan,Veronig, Astrid M.,Moon, Yong-Jae IOP Publishing 2015 The Astrophysical journal Vol.807 No.1
<P>We investigate evolutionary phases of an M6.2 flare and the associated confined eruption of a prominence. The pre-flare phase exhibits spectacular large-scale contraction of overlying extreme ultraviolet (EUV) coronal loops during which the loop system was subjected to an altitude decrease of similar to 20Mm (40% of the initial height) for an extended span of similar to 30 minutes. This contraction phase is accompanied by sequential EUV brightenings associated with hard X-ray (HXR; up to 25 keV) and microwave (MW) sources from low-lying loops in the core region which together with X-ray spectra indicate strong localized heating in the source region before the filament activation. With the onset of the flare's impulsive phase, we detect HXR and MW sources that exhibit intricate temporal and spatial evolution in relation to the fast rise of the prominence. Following the flare maximum, the filament eruption slowed down and subsequently became confined within the large overlying active region loops. During the confinement process of the erupting prominence, we detect MW emission from the extended coronal region with multiple emission centroids, which likely represent emission from hot blobs of plasma formed after the collapse of the expanding flux rope and entailing prominence material. RHESSI spectroscopy reveals high plasma temperature (similar to 30MK) and substantial non-thermal characteristics (delta similar to 5) during the impulsive phase of the flare. The time evolution of thermal energy exhibits a good correspondence with the variations in cumulative non-thermal energy, which suggests that the energy of accelerated particles is efficiently converted to hot flare plasma, implying an effective validation of the Neupert effect.</P>
Analysis of 1/f Noise in Fully Depleted n-channel Double Gate SOI MOSFET
Kushwaha Alok,Pandey Manoj Kumar,Pandey Sujata,Gupta A.K. The Institute of Electronics and Information Engin 2005 Journal of semiconductor technology and science Vol.5 No.3
An analysis of the 1/f or flicker noise in FD n-channel Double Gate SOI MOSFET is proposed. In this paper, the variation of power spectral density (PSD) of the equivalent noise voltage and noise current with respect to frequency, channel length and gate-to-source voltage at various temperatures and exponent $C(i.e\;1/f^c$ is reported. The temperature is varied 125 K from to room temperature. The variation of PSD with respect to channel length down to $0.1{\mu}m$ technology is considered. It is analyzed that l/f noise in FD n-channel Double Gate SOI MOSFET is due to both carrierdensity fluctuations and mobility-fluctuations. But controversy still exits to its origin.
Kushwaha, Upendra,Joshi, Bhuwan,Cho, Kyung-Suk,Veronig, Astrid,Tiwari, Sanjiv Kumar,Mathew, S. K. IOP Publishing 2014 The Astrophysical journal Vol.791 No.1
<P>We present observations of a confined M4.0 flare from NOAA 11302 on 2011 September 26. Observations at high temporal, spatial, and spectral resolution from the Solar Dynamics Observatory, Reuven Ramaty High Energy Solar Spectroscopic Imager, and Nobeyama Radioheliograph observations enabled us to explore the possible triggering and energy release processes of this flare despite its very impulsive behavior and compact morphology. The flare light curves exhibit an abrupt rise of non-thermal emission with co-temporal hard X-ray (HXR) and microwave (MW) bursts that peaked instantly without any precursor emission. This stage was associated with HXR emission up to 200 keV that followed a power law with photon spectral index (gamma) similar to 3. Another non-thermal peak, observed 32 s later, was more pronounced in the MW flux than the HXR profiles. Dual peaked structures in the MW and HXR light curves suggest a two-step magnetic reconnection process. Extreme ultraviolet (EUV) images exhibit a sequential evolution of the inner and outer core regions of magnetic loop systems while the overlying loop configuration remained unaltered. Combined observations in HXR, (E) UV, and Ha provide support for flare models involving the interaction of coronal loops. The magnetograms obtained by the Helioseismic and Magnetic Imager reveal emergence of magnetic flux that began similar to five hr before the flare. However, the more crucial changes in the photospheric magnetic flux occurred about one minute prior to the flare onset with opposite polarity magnetic transients appearing at the early flare location within the inner core region. The spectral, temporal, and spatial properties of magnetic transients suggest that the sudden changes in the small-scale magnetic field have likely triggered the flare by destabilizing the highly sheared pre-flare magnetic configuration.</P>
( Manoj Kushwaha ),( M. S. Abirami ) 한국감성과학회 2021 한국감성과학회 국제학술대회(ICES) Vol.2021 No.-
Accidents occurred usually on roads, which bring enormous losses to society. Road accidents are a universal problem which causes the loss of precious human lives and property. The purpose of this paper is to extract important influence features of road accidents and reduce the dimensionality of datasets for getting better results from machine learning algorithms. Collected datasets from Kaggle and constructed new datasets from existing datasets based on the influence feature of road accidents and perform preprocessing, feature selection and feature extraction. Feature selection is done using heat map and correlation matrix. Feature extraction is done using dimensionality reduction methods such as the Principal Component Analysis (PCA), Linear discriminate analysis (LDA) and t-Distributed Stochastic Neighbor Embedding (t-SNE). The different feature extraction techniques are applied and the results are compared based on the accuracy parameter. It was found that LDA performs better than PCA with accuracy of 85% which uses Random Forest classifier.
( Manoj Kushwaha ),( M. S. Abirami ),( Corresponding Author M. S. Abirami ) 한국감성과학회 2021 추계학술대회 Vol.2021 No.0
Accidents occurred usually on roads, which bring enormous losses to society. Road accidents are a universal problem which causes the loss of precious human lives and property. The purpose of this paper is to extract important influence features of road accidents and reduce the dimensionality of datasets for getting better results from machine learning algorithms. Collected datasets from Kaggle and constructed new datasets from existing datasets based on the influence feature of road accidents and perform preprocessing, feature selection and feature extraction. Feature selection is done using heat map and correlation matrix. Feature extraction is done using dimensionality reduction methods such as the Principal Component Analysis (PCA), Linear discriminate analysis (LDA) and t-Distributed Stochastic Neighbor Embedding (t-SNE). The different feature extraction techniques are applied and the results are compared based on the accuracy parameter. It was found that LDA performs better than PCA with accuracy of 85% which uses Random Forest classifier.
Analysis of 1/f Noise in Fully Depleted n-channel Double Gate SOI MOSFET
Alok Kushwaha,Manoj Kumar Pandey,Sujata Pandey,A. K. Gupta 대한전자공학회 2005 Journal of semiconductor technology and science Vol.5 No.3
An analysis of the 1/f or flicker noise in FD n-channel Double Gate SOI MOSFET is proposed. In this paper, the variation of power spectral density (PSD) of the equivalent noise voltage and noise current with respect to frequency, channel length and gate-tosource voltage at various temperatures and exponent C(i.e 1/f^c) is reported. The temperature is varied 125 K from to room temperature. The variation of PSD with respect to channel length down to 0.1 μm technology is considered. It is analyzed that 1/f noise in FD n-channel Double Gate SOI MOSFET is due to both carrierdensity fluctuations and mobility-fluctuations. But controversy still exits to its origin.
Jitendra Kumar Kushwaha,Laxmi Rathour,Lakshmi Narayan Mishra,Krishna Kumar 한국전산응용수학회 2023 Journal of applied mathematics & informatics Vol.41 No.5
In this paper, we have determined the degree of approximation of function belonging of Lipschitz class by using Deferred-Generalized N\"{o}rlund $ (D_\beta^\gamma.N_{pq})$ means of Fourier series and conjugate series of Fourier series, where $\{p_n\}$ and $\{q_n\}$ is a non-increasing sequence. So that results of DE\~{G}ER and BAYINDIR \cite{DEBA} become special cases of our results.
J. K. Kushwaha,Laxmi Rathour,Vishnu Narayan Mishra,Krishna Kumar 원광대학교 기초자연과학연구소 2022 ANNALS OF FUZZY MATHEMATICS AND INFORMATICS Vol.24 No.3
A number of researchers (See [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]) have determined the degree of approximation of functions belonging to Lipschitz classes, using Cesaro, Euler and generalized Nörlund and various product summability means. Recently Krasniqi [15] has determined the degree of approximation of conjugate of functions using (E,q)(C, α, β) means. Mishra and Khatri [7] also determined the degree of approximation by using (Np.E1) product means in the Hölder metric. In this paper, we have determined the degree of approximation of functions belonging to Lipschitz class and weighted class by using (N, p)(C, θ, β) means of Fourier series and conjugate series of Fourier series which in particular becomes (E, q)(C, θ, β).