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Search Results: 1 - 10 of 894 matches for " Arvind Bijalwan "
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Structure, Composition and Diversity of Horticulture Trees and Agricultural Crops Productivity under Traditional Agri-Horticulture System in Mid Hill Situation of Garhwal Himalaya, India  [PDF]
Arvind Bijalwan
American Journal of Plant Sciences (AJPS) , 2012, DOI: 10.4236/ajps.2012.34057
Abstract: Productivity of agricultural crops under traditional agri-hortculture system alongwith structure, composition and diversity of fruit trees and shrub species in mid hill situation of Garhwal Himalaya, India between 1000 to 2000 m asl during summer and winter seasons on northern and southern aspect were studied. The tree density, composition and diversity in the system varied depending upon aspect, landholding and requirements of the farmers. A total of 12 fruit tree species were recorded in agri-horticulture system; of which 4 trees were common in northern and southern aspect and 6 trees were only noticed in northern aspect while 2 in the southern. The apple tree (Malus domestica) was recorded to be dominant fruit tree species with highest IVI values on both northern and southern aspect with prime preference by the farmers for high additional economic return in agri-horticulture system. Among the shrubs, the 6 shrub species were recorded on the northern aspect whereas there number was 16 on southern aspect. The agricultural crop diversity was higher on the northern aspect in summer and winter season. The average annual productivity of grain under agri-horticulture system recorded 1106 kg·ha–1·year–1 on northern aspect and 1122 kg·ha–1·year–1 on southern with a reduction of 34.56% and 38.29% compared to the sole agriculture crops. The aspect and season also played significantly role in grain, straw and biological productivity of agricultural crops present in agri-horticulture and sole cropping systems. In general there was reduction in yield of agricultural crops under fruit trees but this reduction is supplemented by fruit production which support and sustain the rural community of this hilly region.
Design and Structural Analysis of Flexible Wearable Chair Using Finite Element Method  [PDF]
Ashutosh Bijalwan, Anadi Misra
Open Journal of Applied Sciences (OJAppS) , 2016, DOI: 10.4236/ojapps.2016.67047
Abstract: The flexible wearable chair is like a light weight mobile exoskeleton that allows people to sit any-where in any working position. The traditional chair is difficult to move to different working locations due to its large size, heavy weight (~5 - 7 kg) and rigid structure and thus, they are inappropriate for workplaces where enough space is not available. Flexible wearable chair has a gross weight of 3 kg as it utilizes light-weight aluminium alloy members. Unlike the traditional chair, it consists of kinematic pairs which enable taking halts between continuous movements at any working position and thus, it is capable of reducing the risk of the physical musculoskeletal disorder substantially among workers. The objective of this paper is to focus on the mechanical design and finite element analysis (FEA) of the mechanism using ANSYS software. In the present work, all the parts of the mechanism are designed under static load condition. The results of the analysis indicate that flexible wearable chair satisfies equilibrium and stability criterion and is capable of reducing fatigue during working in an assembly line/factory.
(N+2)-Dimensional Anisotropic Charged Fluid Spheres with Pressure: Riccati Equation
Naveen Bijalwan
Physics , 2011,
Abstract: General exact (N+2)-dimensional,n>=2 solutions in general theory of relativity of Einstein-Maxwell field equations for static anisotropic spherically symmetric distribution of charged fluid are expressed in terms of radial pressure. Subsequently, metrics (e(lambda) and e(nu)), matter density and electric intensity are expressible in terms of pressure. We extend the methodology used by Bijalwan (2011a, 2011c, 2011d) for charged and anisotropic fluid. Consequently, radial pressure is found to be an invertible arbitrary function of w(c1+c2r^2), where c1 and c2(non zero) are arbitrary constants, and r is the radius of star, i.e. p=p(w) . We present a general solution for static anisotropic charged pressure fluid in terms for w. We reduce to the problem of finding solutions to anisotropic charged fluid to that of finding solutions to a Riccati equation. Also, these solutions satisfy barotropic equation of state relating the radial pressure to the energy density.
Anisotropic Spheres with Barotropic Equation of State in Bimetric Theory of Relativity
Naveen Bijalwan
Physics , 2011,
Abstract: Recently, Khadekar (2007) presented the solutions with uniform energy density for anisotropic spheres in bimetric theory. We present here a general analytic solution to the field equations in bimetric theory for anisotropic fluids for a general barotropic equation of state by representing equations in terms for effective radial pressure . We list and discuss some old and new solutions which fall in this category.
Exact Solutions: Anisotropic Stars in Terms of Pressure
Naveen Bijalwan
Physics , 2011,
Abstract: Dev (2002) discussed some exact solutions of anisotropic stars for special forms of TOV for constant energy density. Considering Bijalwan (2011) ansatz for charged perfect fluids we present here some exact solutions to the generalized TOV equation for anisotropic fluids by representing equation in terms for radial pressure. Consequently, radial pressure is found to be an invertible arbitrary function of w(=c1+c2r^2), where c1 and c2 is nonzero are arbitrary constants, and r is the radius of star, i.e. p=p(w) . We present a general solution for anisotropic fluid in terms for w. We list and discuss some old and new solutions which fall in this category. Consequently, we present solutions for generalized TOV considering different forms of anisotropy factor in terms of w. Also, we investigated solutions of generalized TOV with negative density gradient (NDG).
Interiors of SdS and RNdS Spacetime with Pressure and Cosmological Constant
Naveen Bijalwan
Physics , 2011,
Abstract: We extend in this article the charged fluid with pressure derived by Bijalwan (2011a, 2011b) in presence of a cosmological constant.
U(2) invariant squeezing properties of pair coherent states
Arvind
Physics , 2002, DOI: 10.1016/S0375-9601(02)00663-1
Abstract: The U(2) invariant approach is delineated for the pair coherent states to explore their squeezing properties. This approach is useful for a complete analysis of the squeezing properties of these two-mode states. We use the maximally compact subgroup U(2) of Sp(4,R) to mix the modes, thus allowing us to search over all possible quadratures for squeezing. The variance matrix for the pair coherent states turns out to be analytically diagonalisable, giving us a handle over its least eigenvalue, through which we are able to pin down the squeezing properties of these states. In order to explicitly demonstrate the role played by U(2) transformations, we connect our results to the previous analysis of squeezing for the pair coherent states.
Quantum Entanglement and Quantum Computational Algorithms
Arvind
Physics , 2000, DOI: 10.1007/s12043-001-0130-9
Abstract: The existence of entangled quantum states gives extra power to quantum computers over their classical counterparts. Quantum entanglement shows up qualitatively at the level of two qubits. We show that if no entanglement is envolved then whatever one can do with qubits can also be done with classical optical systems. We demonstrate that the one- and the two-bit Deutsch-Jozsa algorithm does not require entanglement and can be mapped onto a classical optical scheme. It is only for three and more input bits that the DJ algorithm requires the implementation of entangling transformations and in these cases it is impossible to implement this algorithm classically.
Wavelet Transform Based Image Denoise Using Threshold Approaches
Akhilesh Bijalwan,Aditya Goyal,Nidhi Sethi
International Journal of Engineering and Advanced Technology , 2012,
Abstract: This paper deals with the threshold estimation method for image denoising in the wavelet transform domain. The proposed technique is based upon the discrete wavelet transform analysis where the algorithm of wavelet threshold is used to calculate the value of threshold. The proposed method is more efficient and adaptive because the parameter required for calculating the threshold based on sub band data. The threshold value is computed by xσ2w0 /σ where x is the scale parameter which depends upon the sub band size and number of decomposition and σw0 is the noise variance estimation. σ are the wavelet coefficient variance estimation in various sub bands. Experimental results on several test images are compared with popular denoise technique from three aspects (PSNR, RMSE and CoC).
Zigbee & IEEE 802.11b(WLAN)coexistence in ubiquitous network environment
Meenu Balodhi,Vishwanath Bijalwan,Banit Negi
Computer Science , 2014,
Abstract: IEEE 802.15.4 standard is used for low rate, short distance wireless communication. However due to its low power it is greatly affected by interference provided by other wireless technology working on same ISM(industrial, scientific & medical) band, such as IEEE 802.11b/g & Bluetooth. In ubiquitous network environment we have two different heterogeneous communication systems coexists in single place. In this paper we use an analytic model and an experimental set up for the coexistence among Zigbee, &WLAN. The model focuses on two aspects, namely Power & Timing. These two jointly impacts on the performance of IEEE 802.15.4 wireless network. Zigbee is main component of wireless sensor network, so therefore to study about performance of network should be need in interference environment.
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