P A College of Engineering

About: P A College of Engineering is a based out in . It is known for research contribution in the topics: Dihedral angle & Ring (chemistry). The organization has 298 authors who have published 594 publications receiving 4888 citations.

MRI Denoising Based on Neutrosophic Wiener Filtering

Abstract: In this paper, a new filtering method is presents to remove Rician noise from magnetic resonance image. This filter is based on Neutrosophic set (NS) approach of wiener filtering. A Neutrosophic Set (NS), a part of neutrosophy theory, studies the origin, nature, and scope of neutralities, as well as their interactions with different ideational spectra.

Thermal Performance Characteristics of a Nuclear Fuel Element Dissipating Heat in a Surrounding Medium

Abstract: This paper deals with the numerical prediction of thermal performance characteristics of a rectangular nuclear fuel element dissipating fission heat in its surrounding medium. Assuming uniform heat generation within the fuel element, the steady, two-dimensional heat conduction equation along with appropriate boundary conditions is solved using second order accurate finite difference scheme. On the basis of axial temperature profiles and the variation of Biot number, Bi and heat generation parameter, Q with respect to maximum temperature, θmax within the fuel element, results are presented for a wide range of aspect ratio, Ar , Bi, and Q and discussed in detail. It is found that with the increase in Ar, the effect of axial conduction on the temperature profile diminishes rapidly and ultimately for all values of Ar ≥7, it remains confined to the region very close to the leading edge. It is also concluded that for a set of fixed values of Ar and Q, there exists a lower limiting value of Bi below which it cannot be decreased. Similarly, for a set of fixed values of Ar and Q, there also exists an upper limiting value of Q above which θmax exceeds its allowable limit. Furthermore, it is concluded that the requirement of increase in Bi due to increase in Q, θmax being within its allowable limit, becomes larger and larger as Q becomes higher and higher.Copyright © 2004 by ASME

2-(4-Bromo-phen-yl)-N-(pyrazin-2-yl)acetamide.

Abstract: In the title compound, C12H10BrN3O, the dihedral angle between the mean planes of the 4-bromo­phenyl and pyrazin-2-yl rings is 54.6 (3)°. An intra­molecular C—H⋯O hydrogen bond generates an S(6) graph-set motif. In the crystal, weak N—H⋯N hydrogen bonds link the mol­ecules into chains along [100]. The chains are linked via C—H⋯N and C—H⋯O hydrogen bonds, forming two-dimensional networks lying parallel to the ab plane.

3-Benzyl-7-(2,4-dichloro­phen­yl)-4H-1,3,4-thia­diazolo[2,3-c][1,2,4]triazin-4-one

Abstract: In the title compound, C(17)H(10)Cl(2)N(4)OS, the phenyl ring and the H atoms attached to the adjacent C atom are disordered over two positions, with refined site occupancies of 0.509 (8) and 0.491 (8). The planar 4H-1,3,4-thia-diazolo[2,3-c][1,2,4]triazine ring system [maximum deviation = 0.048 (3) A] forms dihedral angles of 76.9 (5), 74.9 (5) and 9.88 (12)°, respectively, with the major and minor parts of the disordered phenyl ring and with the dichloro-substituted benzene ring. In the crystal, pairs of C-H⋯O hydrogen bonds link the mol-ecules, forming inversion dimers with an R(2) (2)(18) graph-set motif. A short S⋯N contact of 2.801 (3) A is observed between the dimers.

6‐Bromo‐2,4‐bis(3‐methoxyphenyl)‐3,4‐dihydro‐2H‐1,3‐naphthoxazine

Abstract: The oxazine ring in the title compound, C26H22BrNO3, adopts a half-chair conformation. The amino H atom is not involved in a classical hydrogen bond, but there is a weak N—H⋯π inter­action to the centre of an aromatic ring.