5,186 research outputs found

    Observation of Muon Neutrino Disappearance with the MINOS Detectors in the NuMI Neutrino Beam

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    This Letter reports results from the MINOS experiment based on its initial exposure to neutrinos from the Fermilab NuMI beam. The rates and energy spectra of charged current ν_μ interactions are compared in two detectors located along the beam axis at distances of 1 and 735 km. With 1.27×10^(20) 120 GeV protons incident on the NuMI target, 215 events with energies below 30 GeV are observed at the Far Detector, compared to an expectation of 336±14 events. The data are consistent with ν_μ disappearance via oscillations with Δm_(32)^2|=2.74_(-0.26)^(+0.44)×10^(-3)  eV^2 and sin^2(2θ_(23))>0.87 (68% C.L.)

    Eco-friendly fishing methods and techniques practiced in the northern hills zone of Chhattisgarh state, India

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    Indian forests have the potential to safeguard the livelihood of forest dwelling people, particularly tribal people, who are among the most disadvantaged groups in our society. Tribal people generally depend on forests for their cultural, spiritual, and to varying degree of economic needs. Fishing is one of the important livelihood activities of the tribal community since the time immortal. Fishing provides the source of livelihood as well as nutritional security to the tribal family significantly. An explorative study was conducted in participatory mode to explore the eco-friendly fishing methods. Totally, 300 respondents were selected for this study. The data was documented with the help of participatory observation, focused group discussions with triangulation procedures. In the paper, eco-friendly fishing methods such as Kumani, Pahata, Mora, Donga, Pelna, Choppa, Mora, Gulel, Bhawarjal, Ditori, Beetaah, Chiwaar, Baahla and Jholna and their working procedures are discussed. Jholna used to catch small and medium sized fishes upto 5-7 kg/day. The production cost of this choppa is less than Rs. 250 and it is used to catch small sized fishes up to 1.5-2.5kg/day. Kumani is used to catch small sized fishes and crabs upto 1-2 kg/day. The making cost of Pelna is around Rs. 650 and it is used to catch fishes upto 6-7 kg/day. The construction cost of Pahata gear is around Rs. 2000 and It is used to catch medium to big sized fishes upto 8-10kg/day

    Generic effective source for scalar self-force calculations

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    A leading approach to the modelling of extreme mass ratio inspirals involves the treatment of the smaller mass as a point particle and the computation of a regularized self-force acting on that particle. In turn, this computation requires knowledge of the regularized retarded field generated by the particle. A direct calculation of this regularized field may be achieved by replacing the point particle with an effective source and solving directly a wave equation for the regularized field. This has the advantage that all quantities are finite and require no further regularization. In this work, we present a method for computing an effective source which is finite and continuous everywhere, and which is valid for a scalar point particle in arbitrary geodesic motion in an arbitrary background spacetime. We explain in detail various technical and practical considerations that underlie its use in several numerical self-force calculations. We consider as examples the cases of a particle in a circular orbit about Schwarzschild and Kerr black holes, and also the case of a particle following a generic time-like geodesic about a highly spinning Kerr black hole. We provide numerical C code for computing an effective source for various orbital configurations about Schwarzschild and Kerr black holes.Comment: 24 pages, 7 figures, final published versio

    High Temperature Ferromagnetism with Giant Magnetic Moment in Transparent Co-doped SnO2-d

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    Occurrence of room temperature ferromagnetism is demonstrated in pulsed laser deposited thin films of Sn1-xCoxO2-d (x<0.3). Interestingly, films of Sn0.95Co0.05O2-d grown on R-plane sapphire not only exhibit ferromagnetism with a Curie temperature close to 650 K, but also a giant magnetic moment of about 7 Bohr-Magneton/Co, not yet reported in any diluted magnetic semiconductor system. The films are semiconducting and optically highly transparent.Comment: 12 pages, 4 figure