Final results from the Palo Verde Neutrino Oscillation Experiment

The analysis and results are presented from the complete data set recorded at Palo Verde between September 1998 and July 2000. In the experiment, the \nuebar interaction rate has been measured at a distance of 750 and 890 m from the reactors of the Palo Verde Nuclear Generating Station for a total of 350 days, including 108 days with one of the three reactors off for refueling. Backgrounds were determined by (a) the $swap$ technique based on the difference between signal and background under reversal of the positron and neutron parts of the correlated event and (b) making use of the conventional reactor-on and reactor-off cycles. There is no evidence for neutrino oscillation and the mode \nuebar\to\bar\nu_x was excluded at 90% CL for \dm>1.1\times10^{-3} eV$^2$ at full mixing, and \sinq>0.17 at large \dm.Comment: 11 pages, 8 figure

Neutron production by cosmic-ray muons at shallow depth

The yield of neutrons produced by cosmic ray muons at a shallow depth of 32 meters of water equivalent has been measured. The Palo Verde neutrino detector, containing 11.3 tons of Gd loaded liquid scintillator and 3.5 tons of acrylic served as a target. The rate of one and two neutron captures was determined. Modeling the neutron capture efficiency allowed us to deduce the total yield of neutrons $Y_{tot} = (3.60 \pm 0.09 \pm 0.31) \times 10^{-5}$ neutrons per muon and g/cm$^2$. This yield is consistent with previous measurements at similar depths.Comment: 12 pages, 3 figure

Внедрение и принцип работы системы сейсмического мониторинга горного массива для работы в условиях ООО "Шахта "Усковская"

The status of the Silicon Microvertex Detector (SMD) and its installation into the LEP-L3 experiment are presented, highlighting novel features and sophisticated techniques. Preliminary results based on 1993 data are given and compared with Monte Carlo predictions, to understand the detector performances and its tracking capabilities

Исследование структуры и механических свойств изделий, выращенных электродуговым послойным выращиванием

В процессе исследования проводились: литературный обзор по исследуемой тематике, проектирование, разработка и изготовление конструкции 3d-принтера, определение методов и методик исследований, исследование структуры металлических изделий, напечатанных на 3D-принтере, исследование механических свойства металлических изделий, напечатанных на 3D-принтере, произведен анализ вредных и опасных производственных факторов в лаборатории, расчет себестоимости изготовления.During the study, they conducted: a literary review on the subject, design, design and manufacture of the 3d-printer design, the identification of methods and methods of research, the study of the structure of metal products printed on a 3D-printer, the study of the mechanical properties of metal products printed on a 3D-printer, the analysis of harmful and dangerous production factors in the laboratory, the calculation of the cost of manufacture