153 research outputs found
Neutrino Geophysics at Baksan I: Possible Detection of Georeactor Antineutrinos
J.M. Herndon in 90-s proposed a natural nuclear fission georeactor at the
center of the Earth with a power output of 3-10 TW as an energy source to
sustain the Earth magnetic field. R.S. Raghavan in 2002 y. pointed out that
under certain condition antineutrinos generated in georeactor can be detected
using massive scintillation detectors. We consider the underground Baksan
Neutrino Observatory (4800 m.w.e.) as a possible site for developments in
Geoneutrino physics. Here the intrinsic background level of less than one
event/year in a liquid scintillation ~1000 target ton detector can be achieved
and the main source of background is the antineutrino flux from power reactors.
We find that this flux is ~10 times lower than at KamLAND detector site and two
times lower than at Gran Sasso laboratory and thus at Baksan the georeactor
hypothesis can be conclusively tested. We also discuss possible search for
composition of georector burning nuclear fuel by analysis of the antineutrino
energy spectrum.Comment: 7 pages in LaTeX, 3 PS figures, Submitted to Physics of Atomic Nucle
Natural Nuclear Reactor Oklo and Variation of Fundamental Constants Part 1: Computation of Neutronics of Fresh Core
Using modern methods of reactor physics we have performed full-scale
calculations of the natural reactor Oklo. For reliability we have used recent
version of two Monte Carlo codes: Russian code MCU REA and world wide known
code MCNP (USA). Both codes produce similar results. We have constructed a
computer model of the reactor Oklo zone RZ2 which takes into account all
details of design and composition. The calculations were performed for three
fresh cores with different uranium contents. Multiplication factors,
reactivities and neutron fluxes were calculated. We have estimated also the
temperature and void effects for the fresh core. As would be expected, we have
found for the fresh core a significant difference between reactor and Maxwell
spectra, which was used before for averaging cross sections in the Oklo
reactor. The averaged cross section of Sm-149 and its dependence on the shift
of resonance position (due to variation of fundamental constants) are
significantly different from previous results.
Contrary to results of some previous papers we find no evidence for the
change of the fine structure constant in the past and obtain new, most accurate
limits on its variation with time:
-4 10^{-17}year^{-1} < d alpha/dt/alpha < 3 10^{-17} year^{-1}
A further improvement in the accuracy of the limits can be achieved by taking
account of the core burnup. These calculations are in progress.Comment: 25 pages, 14 figures, 12 tables, minor corrections, typos correcte
InhibiciĂłn de butirilcolinesterasa en dos perros intoxicados y confirmaciĂłn analĂtica de carbofuran como agente causal
FerrĂ©, D.M.; Saldeña, E.L.; AlbarracĂn, L.; Neuilly, V.; Gorla, N.B.: InhibiciĂłn de butirilcolinesterasa en dos perros intoxicados y confirmaciĂłn analĂtica de carbofuran como agente causal. Rev. vet. 26: 1, 43-48, 2015
New directions in offender typology design, development, and implementation: Can we balance risk, treatment and control?
From Doldrums to Progressing Knowledge: Identifying Stifling Issues in Criminological Theory Building and Testing
In the explanation of crime, although each social science has a primary focus of theoretical development, there are a number of areas where disciplines unwittingly parallel one another. Such parallel development promotes unnecessary competition among theories and prevents them from progressing knowledge. Additionally, theorists often discard related concepts presented by other disciplines, if they considered at all, which is indicative of an imbalance in the disciplinary frame of reference (e.g., psychology over sociology). Such imbalance and lack of cross-referencing impedes the ability of theories to adequately explain and understand criminality. This paper revisits how the theorizing of crime may benefit from such cross-referencing through what we refer to as a reciprocating perspective. Drawing on interdisciplinary literature, we present a conceptual approach that can aid in strengthening theoretical development. Aiming to create an interdisciplinary bridge, we address key pitfallsin criminological theory development through four main elements: (1) concept formalization, (2) multi-level conceptualization, (3) causality, and (4) application. We also outline problems caused by such imbalance, and the progress made possible by the approach
Le Théâtre Sériel, l Autre Scène de Crime (approche Projective Psychocriminologique du Meurtre en Série)
La présente recherche vise à élaborer une perspective nouvelle d analyse de la scène de crime sérielle selon un paradigme psycho-criminologique. A cette fin, il sera fait usage d une méthodologie à plusieurs niveaux, combinant approche phénoménologique, avec analyse de données statistiques, et ce, de façon comparative. Les discours se positionnant sur la scène et son analyse seront d abord identifiés et présentés, qu il s agisse du discours légal, du discours médico-légal, du discours policier, du discours psy , du discours politique ou encore du discours médiatique. Puis des scènes de morts, violentes et non violentes, criminelles, et non criminelles, codées lors de séjours de recherches dans deux instituts médico-légaux (l un en France, l autre aux Etats-Unis) seront utilisées de façon statistique comme illustration de la complexité phénoménologique de la scène. Ces mêmes scènes seront ensuite analysées qualitativement, afin de donner du relief aux analyses statistiquesThe present research seeks to establish a new perspective on serial crime scene analysis, following a psycho-criminological paradigm. In order to achieve this goal, a multi-level methodology will be used, combining a phenomenological approach and statistical analyses, in a comparative manner. The discourses having stakes in the crime scene and its analysis will first be identified and presented, whether they be legal, medico-legal, police-related, psych, political, or media-related. Death scenes, be they violent or not, criminal or not, collected during a field research in two medical examiners officers (one in France and one in the United States), will then be used statistically in order to illustrate the phenomenological complexity of the scene. These same data will then be qualitatively analyzed so as to give depth to the statistical analysisRENNES2-BU Centrale (352382101) / SudocSudocFranceF
Simulation des effets macroeconomiques d'un programme de depenses pour l'environnement (Application du modele POLLEN pour la periode 1983-1990)
SIGLECNRS-CDST / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc
Compte rendu des principaux travaux effectues par l'Ecotheque mediterraneenne du CNRS pour MED Checklist/optima
SIGLECNRS-CDST / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc
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