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1
Content available remote Analysis of triple metal surrounding gate (TM-SG) III–V nanowire MOSFET for photosensing application
Sharma S. K., Jain A., Raj B.
Opto-Electronics Review
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2018
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Vol. 26, No. 2
141--148
EN
In this paper, a low power highly sensitive Triple Metal Surrounding Gate (TM-SG) Nanowire MOSFET photosensor is proposed which uses triple metal gates for controlling short channel effects and III–V compound as the channel material for effective photonic absorption. Most of the conventional FET based photosensors that are available use threshold voltage as the parameter for sensitivity comparison but in this proposed sensor on being exposed to light there is a substantial increase in conductance of the GaAs channel underneath and, thereby change in the subthreshold current under exposure is used as a sensitivity parameter (i.e., Iillumination/IDark). In order to further enhance the device performance it is coated with a shell of AlxGa1-x As which effectively passivates the GaAs surface and provides a better carrier confinement at the interface results in an increased photoabsorption. At last performance parameters of TM-SG Bare GaAs Nanowire MOSFET are compared with TM-SG core-shell GaAs/AlGaAs Nanowire MOSFET and the results show that Core-Shell structures can be a better choice for photodetection in visible region.
2
Content available Some strongly almost summable sequence spaces
Sharma S. K., Esi A.
Journal of Mathematics and Applications
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2017
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Vol. 40
171--183
EN
In the present paper we introduce some strongly almost summable sequence spaces using ideal convergence and Musielak-Orlicz function M = (Mk) in n-normed spaces. We examine some topological properties of the resulting sequence spaces.
3
Content available Effect of flux composition on the percentage elongation and tensile strength of welds in submerged arc welding
Singh B., Khan Z. A., Siddiquee A. N., Maheswari S., Sharma S. K.
Archive of Mechanical Engineering
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2016
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Vol. LXIII, nr 3
337--354
EN
This experimental study reveals the effects of CaF2, FeMn and NiO additions to the base fluxes on tensile strength and percentage elongation of the weld metal. The aim of this study is to develop suitable flux for mild steel for high tensile strength, impact strength and ductility. Bead on plate welds were made using submerged arc welding process. Mathematical model for percentage elongation and UTS of mild steel welds were made. The elements transfer to the welds have been correlated with the above mechanical performance characteristics. The effect of oxygen content on weld elongation and UTS also has been deduced. This study shows that CaF2 and NiO are the significant factors for tensile strength while FeMn is not significant for tensile strength. However, for elongation besides CaF2, the interaction of CaF2 and FeMn was also found significant. The effects of basicity index of the flux and carbon equivalent of the welds on tensile strength and percentage elongation of the welds have also been evaluated.
PL
W studium eksperymentalnym, przedstawionym w pracy, pokazano wpływ domieszek CaF2, FeMn i NiO do podstawowego składu topnika na wytrzymałość na rozciąganie i procentowe wydłużenie metalu spawu. Celem studium było opracowanie topnika odpowiedniego dla stali niskowęglowej, który zapewnia wysoką wytrzymałość na rozciąganie, wytrzymałość na udary i plastyczność. Ściegi spawów wykonano metodą spawania łukiem krytym. Opracowano model matematyczny wydłużenia procentowego i wytrzymałości na rozciąganie (UTS) dla spawów ze stali niskowęglowej. Zbadano korelację między wymienionymi charakterystykami mechanicznymi a transferem pierwiastków do spawu. Wyznaczono także wpływ zawartości tlenu na wydłużenie spawu i ostateczną wytrzymałość na rozciąganie. W badaniach doświadczalnych wykazano, że domieszki CaF2 oraz NiO są istotnymi czynnikami wpływającymi na wytrzymałość na rozciąganie, podczas gdy domieszka FeMn nie ma istotnego wpływu. Oceniono także wpływ współczynnika zasadowości topnika i równoważnika węglowego spawu na wydłużenie procentowe spawu.
4
Content available Some seminormed difference sequence spaces defined by a Musielak-Orlicz function over n-normed spaces
Raj K., Sharma S. K.
Journal of Mathematics and Applications
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2015
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Vol. 38
115--131
EN
In the present paper we introduced some seminormed difference sequence spaces combining lacunary sequences and Musielak-Orlicz function M = (Mk) over n-normed spaces and examine some topological properties and inclusion relations between resulting sequence spaces.
5
Content available remote Some new generalized classes of difference sequences of fuzzy numbers defined by a sequence of Orlicz functions
Sharma S. K.
Journal of Mathematics and Applications
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2013
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Vol. 36
85--93
EN
In the present paper we introduce some new generalized classes of difference sequence spaces of fuzzy numbers defined by a sequence of Orlicz functions. We also make an effort to study some topological properties and prove some inclusion relations between these spaces.
6
Content available Kinetics and thermodynamics of gossypol extraction from defatted cottonseed meal by ethanol
Devesh K. S., Sharma S. K., Sambi S. S.
Polish Journal of Chemical Technology
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2012
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Vol. 14, nr 2
29-34
EN
Gossypol is polyphenolic aldehyde, a toxic substance naturally present in cotton plant to protect it from insects, pests and diseases. Maximum gossypol is concentrated in the seed. After extraction of oil from the cottonseed, the defatted cottonseed meal which contains both the gossypol and proteinous matter is left behind. A number of attempts have been made using different solvents to extract gossypol from the seeds. However, all these efforts have remained in the realm of academic activity only as none of them could be commercialized. If a pilot plant or commercial scale plant is to be developed then the data on the kinetics and thermodynamics of the extraction process is required. In this study ethanol has been used as the solvent at temperature below 323K for removal of gossypol from the defatted seed. This study finds the effects of parameters viz. temperature, solvent to solid ratio (SR) and extraction time on the gossypol extraction efficiency. The data obtained are used to establish the kinetics and thermodynamics of the extraction process.
7
Content available remote Sequence spaces defined by a sequence of modulus function in n-normed spaces
Raj K., Sharma S. K.
Fasciculi Mathematici
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2012
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Nr 49
113--125
EN
In the present paper we introduce the sequence spaces defined by a sequence of modulus function F = (fk) in n-normed spaces. We study some topological properties and prove some inclusion relations between these spaces.
8
Content available remote Study of an oxygenation process in capillary in the presence of magnetic field
Bali R., Awasthi U., Sharma S. K.
International Journal of Applied Mechanics and Engineering
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2011
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Vol. 16, no 2
331-344
EN
A mathematical model for the transport of oxygen in the systemic capillaries and the surrounding tissue in the presence of a magnetic field is presented in this paper. We have modeled the capillary by a circular cylinder surrounded by a tissue of uniform thickness. The model takes into account the transport mechanisms of molecular diffusion, convection and diffusion due to the presence of hemoglobin as a carrier of the gases (oxygen).The resulting system of differential equations is solved analytically by the method of separation of variable and Picard's method. The result for partial pressure of oxygen in the capillary and tissue region is obtained. The effect of the Hartmann number (H) and others parameters is obtained and discussed through graphs.
9
Content available remote Weighted substitution operators between Lp -spaces of vector-valued functions
Raj K., Sharma S. K.
Fasciculi Mathematici
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2011
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Nr 47
63--70
EN
In this paper we characterize weighted substitution operators between Lp-spaces of vector-valued functions and also make an attempt to characterize isometry and partial isometry of these operators
10
Content available remote A bi-phasic model for artificial replacement
Bali R., Shukla A. K., Sharma S. K.
International Journal of Applied Mechanics and Engineering
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2009
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Vol. 14, no 3
633-643
EN
Joint replacement is widely used for treatment when joints fail to support loads or normal functions due to some accidental force or diseases. The analytical models for artificial human knee joints introducing the concept of porous implants with bone in growth into the pores, may provide better implantation than using cement or rigid, plastic/metallic materials. The purpose of the present study is to determine theoretically the articular contact mechanics of an artificial knee joint containing biphasic cartilage layers under restricted motion during normal walking. The present work incorporates the effect of a viscoelastic fluid as a lubricant on the parameter related to the lubrication mechanism. It has been observed that the load carrying capacity increases with increasing values of viscoelastic parameters. The effect of an increase in the viscoelastic parameter of the lubricant in similar to that of an increase in concentration of hyaluronic acid molecules in the synovial fluid. This helps in sustaining the greater loads. Further, we also observe that as the slip velocity at the porous boundary increases, load carrying capacity decreases owing to the increased filtration of base fluid into the porous cartilage. Thus, the slip velocities existing at the porous boundary play on important role in the self-adjusting nature of the artificial joint.
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