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Search Results: 1 - 10 of 170 matches for " Devashish Konar "
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Juvenile Justice as a Part of Child and Adolescent Care
Devashish Konar
Journal of Indian Association for Child and Adolescent Mental Health , 2005,
Abstract: Juvenile justice has been given some shape with Juvenile Justice Act 2000 AD. Persons dealing withchildren need to sensitize themselves with this Act. One needs to know the provisions made, tounderstand whether it is being properly implemented. Only on observing it being implemented, can oneget insight into the problems inherent in it, and if one knows the problems, one can suggestimprovements in the Act. Even if the law gives adequate guidelines, institutions are still needed to lookafter the children in distress or children in conflict with law. For successful compliance of Court orders,and to punish violators, monitoring bodies need to be set up, who should be given legal powers as well.Effective child protection and development depends on skills, knowledge and judgment of allprofessionals, personnel and staff working with children.
Persistence Exponent for Diffusion: The Exact Solution
Devashish Sanyal
Physics , 2010,
Abstract: The persistence exponent for diffusion equation with random gaussian initial conditions has been calculated for any dimension $d$. The value of the exponent in the asymptotic limit for large time comes out to be $d/4$ . The result is at variance with the generally accepted values of $0.12$,$0.18$ and $0.23$ for $d=1,2,3$ respectively.
Phase Transition between 'A' and 'B' forms of DNA: A Free Energy Perspective
Devashish Sanyal
Physics , 2010, DOI: 10.1103/PhysRevE.81.032901
Abstract: We study the structural transition from `B' form of DNA to 'A' form of DNA using group theoretic methods. The transition is not of the order-disorder type and hence to construct a Landau kind of theory for the transition we define a higher symmetry and relevant order parameters. We also discuss the issue of all the conformations, observed experimentally during the course of transition, being fundamentally different or not.
Screening for Aphid Incidence on Some Potato Germplasm in Plains of West Bengal  [PDF]
Biplab Kahar, Amitava Konar
Agricultural Sciences (AS) , 2016, DOI: 10.4236/as.2016.76036
Abstract: A field trial was conducted to study the impact of various potato germplasm against aphids, Myzus persicae (Sulzer) and Aphis gossypii Glover (Aphididae: Hemiptera) during rabi season from November to March in 2012-2013 and 2013-2014, respectively at Adisaptagram Block Seed Farm, Hooghly, West Bengal. The population of aphids was started on potato crop in between third week of December and first week of January irrespective of various germplasms, except K. Chipsona-2, where its infestation was initiated during second and third week of January. Then, their population was gradually increased to reach its critical level (ETL) during first and second week of January in most of the potato germplasm, except in K. Anand, K. Chipsona-1, K. Chipsona-2 and Sailaja, where it was crossed in between fourth week of January and first week of February. The peak population of aphids was observed during third and fourth week of February in most of the potato germplasm. It was observed that K. Ashoka, K. Badshah, K. Chandramukhi, K. Jawahar, K. Jyoti and K. Pukhraj were highly susceptible to the pests, while K. Anand and K. Sutlez were moderately susceptible but K. Chipsona-1 , K. Chipsona-2 and K. Sailaja were less susceptible or tolerant to the pests. Maximum tuber yield (t/ha) of potato was recorded in K. Badshah (36.58 - 43.92) while it was lowest in K. Chandramukhi (22.08 - 22.12).
Quantum Weak Turbulence
Devashish Sanyal,Siddhartha Sen
Physics , 2004,
Abstract: The study of the phenomenon of quantum weak turbulence is extended by determining the quasiparticle spectrum associated with such a system using a Green's function approach. The quasiparticle spectrum calculated establishes the dissipative regime and the inertial regime, hence a Kolmogorov type of picture.
The Magnetar Fields
Sushan Konar
Physics , 2003,
Abstract: We discuss the nature of evolution of the magnetic field in Magnetars.
Of Neutrinos and Magnetars
Sushan Konar
Physics , 2003,
Abstract: We discuss the nature of neutrino propagation in the presence of strong magnetic fields of Magnetars.
The Binary History and the Magnetic Field of Neutron Star
Sushan Konar
Physics , 2009,
Abstract: There has been strong observational evidence suggesting a causal connection between the binary history of neutron stars and the evolution of their magnetic field. In this article we discuss one of the plausible mechanisms proposed for the evolution of the surface magnetic field, that of the diamagnetic screening of the field by accreted material.
Magnetic Field Evolution of Accreting Neutron Stars IV - Effect of the Curvature of Space-Time
Sushan Konar
Physics , 2000, DOI: 10.1046/j.1365-8711.2002.05449.x
Abstract: The evolution of the magnetic field in an accreting neutron star is investigated using a fully general relativistic treatment and assuming that initially the currents supporting the field are completely confined to the crust. We find that the field decay slows down due to the inclusion of the curvature of space-time but the final results do not differ significantly from those obtained assuming a flat space-time. We also find that such modifications are small compared to the uncertainties introduced by a lack of precise knowledge of the neutron star micro-physics.
Evolution of the Magnetic Field in Accreting Neutron Stars
Sushan Konar
Physics , 2000,
Abstract: There has been sufficient observational indication suggesting a causal connection between the binary history of neutron stars and the evolution of their magnetic field. In particular, it is believed that the generation of the low-field millisecond pulsars is a consequence of the processing of normal high-field neutron stars in binary systems. We try to understand the mechanism of field evolution in neutron stars that are members of binary systems with an aim to understand the problem of millisecond pulsar generation. To this end we have looked at four related problems : i. the effect of diamagnetic screening on the final field of a neutron star accreting material from its binary companion; ii. evolution of magnetic flux located in the crust of an accreting neutron star; iii. application of the above-mentioned model to real systems and a comparison with observations; iv. an investigation into the consequences of magnetic flux being initially located in the core of the star and its observational implications.
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