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Search Results: 1 - 10 of 401352 matches for " M. Diwan "
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AGS Super Neutrino Beam Facility Accelerator and Target System Design (Neutrino Working Group Report-II)
M. Diwan
Physics , 2003,
Abstract: This document describes the design of the accelerator and target systems for the AGS Super Neutrino Beam Facility. Under the direction of the Associate Laboratory Director Tom Kirk, BNL has established a Neutrino Working Group to explore the scientific case and facility requirements for a very long baseline neutrino experiment. Results of a study of the physics merit and detector performance was published in BNL-69395 in October 2002, where it was shown that a wide-band neutrino beam generated by a 1 MW proton beam from the AGS, coupled with a half megaton water Cerenkov detector located deep underground in the former Homestake mine in South Dakota would be able to measure the complete set of neutrino oscillation parameters. This report details the performance requirements and conceptual design of the accelerator and the target systems for the production of a neutrino beam by a 1.0 MW proton beam from the AGS. The major components of this facility include a new 1.2 GeV superconducting linac, ramping the AGS at 2.5 Hz, and the new target station for 1.0 MW beam. It also calls for moderate increase, about 30%, of the AGS intensity per pulse. Special care is taken to account for all sources of proton beam loss plus shielding and collimation of stray beam halo particles to ensure equipment reliability and personal safety. A preliminary cost estimate and schedule for the accelerator upgrade and target system are also included.
Decays of Long Lived Lightest Supersymmetric Particles in the Galactic Halo
M. V. Diwan
Physics , 1996,
Abstract: If dark matter neutral LSPs in the galactic halo decay into two body final states containing photons or neutrinos they could be detected even if the decay rates are very small, 10**{-32} per sec. I calculate mass and lifetime bounds from current astrophysical data on monochromatic photons and neutrinos and suggest that the poorly explored region between 10 GeV and 1 TeV be explored for signs of supersymmetry from space.
Very Long Baseline Neutrino Oscillation Experiment for Precise Determination of Oscillation Parameters and Search for nu_mu -> nu_e Appearance and CP Violation
BNL Neutrino Working Group,M. Diwan
Physics , 2002,
Abstract: The possibility of making a low cost, very intense (1MW) high energy proton source at the Brookhaven Alternating Gradient Synchrotron (BNL-AGS) along with the forthcoming new large underground detectors (approaching 1 MT in mass) at the National Underground Science and Engineering Laboratory (NUSEL) in Homestake, South Dakota or at the Waste Isolation Pilot Plant (WIPP) in Carlsbad, New Mexico, allows us to propose a program of experiments that will address fundamental aspects of neutrino oscillations and CP-invariance violation. This program is unique because of the very long baseline of more than 2500 km from BNL to the underground laboratory in the West. We used the running scenario of a low energy, wide band neutrino beam with 1 MW AGS, 500 kT of fiducial mass water Cherenkov detector, and 5x10^7 seconds of running time. In this report we show that with these conditions we precisely measure dm^2_32 and sin^2(2theta_23) and have excellent sensitivity to sin^2(2theta_13) with a distinctive signal spectrum. If sin^2(2theta_13) > 0.01 the experiment is sensitive to the CP-violating phase in the mixing matrix with only neutrino running. By running in the anti-neutrino mode we distinguish between the cases dm^2_31 > 0 versus dm^2_31 < 0 using distinctive distortions to the electron or positron spectrum. Lastly, the very long baseline allows the measurement of dm^2_21 (in the LMA region) with approximately the same resolution as KAMLAND but in the nu_mu -> nu_e appearance channel.
The Kinetics of Aromatic Nitration
Ameya P. Diwan,Sanjay M. Mahajani,Vinay A. Juvekar
Lecture Notes in Engineering and Computer Science , 2010,
Assessment of Obesity in School Children
Shah C,Diwan J,,Rao P,Bhabhor M
Calicut Medical Journal , 2008,
Abstract: Introduction:The WHO refers obesity as a globalepidemic because of rapid increase in thenumber of overweight and obese individualsin last 20 years. The onset of obesity mayoccur at any age and it maybe triggered byfactors such as early weaning, inadequatefood intake, eating disorders and problemsrelated to disturbed family relationships.Objectives:1. Assessment of nutritional status ofschool children2. To analyze the relationshipbetween obesity with physicalactivity and sleeping hours.3. To analyze the relationshipbetween obesity and correlationbetween waist hip ratio and bodymass index.Materials and methods:We measured the weight, height, body massindex and mid arm circumference ofchildren. The children were classified asnormal, underweight, overweight or obese,according to body mass index per age. 54children were assessed at a school nearBhavnagar Medical CollegeResults:Out of 54 students, there were 32 girls and22 boys. Out of 32 girls 11 were normal, 3were overweight and 18 were under weightand out of 22 boys 6 were normal, 1overweight and 15 were under weight.Discussion:The prevalence of overweight and obesity inschool-aged children in our study counterthe results obtained from other studies.Present data was analyzed statistically andwe had tried to correlate it with sleepinghours, time spent in front of TV andcomputer as well as physical activity. Wehave also tried to find out the association ofparents occupation with their weight status.Conclusion:We observed an association betweenexcess weight and obesity and inactivity inchildren. The time spent in sleeping was apositive factor for maintaining a balancebetween weight and height. There was alsoan association between underweightchildren and working mothers.Key Words :
Unitarity Tests of the Neutrino Mixing Matrix
X. Qian,C. Zhang,M. Diwan,P. Vogel
Physics , 2013,
Abstract: We discuss unitarity tests of the neutrino mixing (PMNS) matrix. We show that the combination of solar neutrino experiments, medium-baseline and short-baseline reactor antineutrino experiments make it possible to perform the first direct unitarity test of the PMNS matrix. In particular, the measurements of Daya Bay and JUNO (a next generation medium-baseline reactor experiment) will lay the foundation of a precise unitarity test of $|U_{e1}|^2 + |U_{e2}|^2 + |U_{e3}|^2 = 1 $. Furthermore, the precision measurement of $\sin^22\theta_{13}$ in both the $\bar{\nu}_e$ disappearance and the $\nu_e$ appearance (from a $\nu_{\mu}$ beam) channels will provide an indirect unitarity test of the PMNS matrix. Together with the search for appearance/disappearance at very short distances, these tests could provide important information about the possible new physics beyond the three-neutrino model.
Vaccines and Antibodies for Therapeutic Use in Cancers  [PDF]
G. P. Talwar, Jagdish C. Gupta, M. Diwan, J. Frick, S. K. Sharma, S. N. Wadhwa, R. M. Gupta, S. K. Gupta, Shilpi Purswani, Hemant K. Vyas
Journal of Cancer Therapy (JCT) , 2016, DOI: 10.4236/jct.2016.76040
Abstract: This review describes briefly the beneficial use of two vaccines developed by us for treatment of cancers. The vaccine against Luteinizing Hormone Releasing Hormone (LHRH) is effective in carcinoma of prostate as well as in breast cancers dependent on androgens and estrogens respectively. LHRH being identical in both males and females, the same vaccine is usable in both Prostate and Breast steroid hormones-dependent-cancers. Monoclonal antibodies are finding therapeutic utility in several cancers, and many have received Drugs Regulatory approval. The monoclonals developed by us against hCG and against epitopes present on androgen-independent castration resistant prostate cancers are briefly recapitulated. Anti-hCG antibodies kill several cancers expressing hCG. An example is given of A549 lung carcinoma. MoAb730 and MoAb7B2G10 kill DU-145 and PC-3 androgen-independent castration resistant prostate cancer cells. Some cancers such as MOLT-4, a T-lymphoblastic leukemia, though expressing hCG are not killed by PiPP, the high affinity anti-hCG antibody. Linking the antibody to curcumin however works like a “Magic Bullet”. All MOLT-4 cells are killed by this conjugate, the antibody homes selectively to cancer cells expressing hCG to deliver curcumin which exercises the killing effect. A recombinant vaccine, hCGβ-LTB (human chorionic gonadotropin subunit β linked to B subunit of heat-labile enterotoxin of E. coli) has been made, which induces high titre bioeffective antibodies not only in BalbC, but also in other genetic strains of mice. The vaccine employs autoclaved Mycobacterium indicus pranii (MiP) as adjuvant. MiP invigorates both humoral and cell mediated immune responses against Human chorionic gonadotropin (hCG). Besides being a potent adjuvant, MiP used alone heals anogenital warts in humans and has the property of preventing and curing SP2/O Myelomas in mice.
Role of homoeopathy in ophthalmological conditions
Chand Diwan
Indian Journal of Ophthalmology , 1982,
Neutrino Oscillations in the Precision Era
M. Bishai,M. V. Diwan,S. Kettell,J. Stewart,B. Viren,E. Worchester,L. Whitehead
Physics , 2012,
Abstract: With the discovery of a modest size for the mixing angle $\theta_{13} \sim 9^\circ$ by the Daya Bay collaboration at $>$5 sigma (\cite{dayabay}) the science of neutrino oscillations has shifted to explicit demonstration of CP violation and precision determination of the CP phase in the 3-flavor framework. Any additional contributions from new physics to the oscillation channel $\nu_\mu \to \nu_e$ could be uncovered by multiple constraints in the ($\theta_{13}, \delta_{CP}$) parameter space. In long-baseline experiments such constraints will require examination of the oscillation strength at higher $L/E$ where the effects of CP violation will be large. For the fixed baseline of 1300 km for the Long-Baseline Neutrino Experiment (LBNE, Fermilab to Homestake), it will be important to examine oscillations at low energies ($<1.5$ GeV) with good statistics, low backgrounds, and excellent energy resolution. The accelerator upgrades in the Project-X era have the potential to offer the beams of the needed intensity and quality for this advanced science program. In this paper we examine the event rates for high intensity, low energy running of Project-X and the Fermilab Main Injector complex, and the precision in the ($\theta_{13}, \delta_{CP}$) space. In this paper we have examined the baseline distance of 1300 km in detail, however we point out that much longer distances such as 2500 km should also be exmained with a beam from FNAL in light of the new understanding of the neutrino mixing.
Precision physics with a wide band super neutrino beam
V. Barger,M. Dierckxsens,M. Diwan,P. Huber,C. Lewis,D. Marfatia,B. Viren
Physics , 2006, DOI: 10.1103/PhysRevD.74.073004
Abstract: We carry out a state-of-the-art assessment of long baseline neutrino oscillation experiments with wide band beams. We describe the feasibility of an experimental program using existing high energy accelerator facilities, a new intense wide band neutrino beam (0-6 GeV) and a proposed large detector in a deep underground laboratory. We find that a decade-long program with 1 MW operation in the neutrino mode and 2 MW operation in the antineutrino mode, a baseline as long as the distance between Fermilab and the Homestake mine (1300 km) or the Henderson mine (1500 km), and a water Cherenkov detector with fiducial mass of about 300 kT has optimum sensitivity to \theta_{13}, the mass hierarchy and to neutrino CP violation at the 3\sigma C.L. for \sin^22\theta_{13}>0.008. This program is capable of breaking the eight-fold degeneracy down to the octant degeneracy without additional external input.
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