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Sample records for calibration du calorimetre

  1. Calibration by precise charge injection of a sub-detector of CMS; Calibration par injection de charge du calorimetre electromagnetique de CMS

    Energy Technology Data Exchange (ETDEWEB)

    Yong-Wook Baek

    2001-01-26

    This thesis was carried out within the framework of the international collaboration which has the responsibility of the experience CMS (Compact Muon Solenoid) on LHC, at CERN. The physics of the fundamental particles which will be explored by this experiment is described within the standard model. The configuration of sub-detector of CMS is briefly described, with a particular weight on the read-out chain of the electromagnetic calorimeter. The work carried out to calibrate this chain by a precise charge injection at the input of preamplifiers is described. The 4 integrated circuits CTRL, TPLS, DAC, and injector which will constitute the components of this chain of calibration are described. The circuit of injection, which is the main circuit in this project, was imagined and developed at the laboratory in DMILL technology. This injector generates a signal which has a form identical to the signal of the detector. The measurements on the linearity of the injectors are presented. In order to know its behavior under real conditions (flow of neutrons {approx} 2 x 10{sup 13} neutrons/cm{sup 2}/10 years) where this circuit is installed in detector CMS, we submitted the prototypes of injector to irradiation and the results are summarized. The research and development on this circuit produced an integrated circuit hardened to irradiations, whose variation of slope is lower than 0.25% for an integrated of 2 x 10{sup 13} neutrons/cm{sup 2} and indestructible under 10{sup 15} neutrons/cm{sup 2}. This circuit has satisfactory qualities to be assembled on the electronic card which will treat the data of calorimeter ECAL of CMS. (author)

  2. Calibration of the Atlas electromagnetic calorimeter. Search for the Higgs boson in its invisible decays; Etalonnage du calorimetre electromagnetique d'ATLAS. Recherche du boson de Higgs dans ses desintegrations invisibles

    Energy Technology Data Exchange (ETDEWEB)

    Neukermans, L

    2002-05-01

    The most promising channels for an intermediate mass Higgs boson discovery at LHC are leptonic and photonic decays. Therefore, a good uniformity of response of the electromagnetic calorimeter is required to reach the 0.7% constant term needed. This thesis deals with the absolute calibration of this detector. An electrical description of the calibration system, the detector and its read-out chain has been made for a better comprehension of the signal pulse shapes. A method, using a convolution of the calibration waveforms, has been developed to predict physics response, leading to absolute calibration. The level of accuracy obtained allows to reach the 0.3% contribution to the constant term required. Test beam analysis of a prototype module showed the performance of the electromagnetic calorimeter in terms of local resolution and linearity. A uniformity study has been made, leading to a 0.8% dispersion on a {delta}{eta} x {delta}{phi} = 1.2 x 0.75 area. In a second part, the observability of an invisible Higgs boson produced via weak boson fusion at the LHC is presented. A level 1 trigger strategy for this purely jet and missing E{sub T} final states is discussed. A method to measure the level of background using physics events is presented. This analysis shows that an invisible branching ratio of 25% could be reached at 95% CL with only 30 fb{sup -1} for a Higgs boson mass of 120 GeV/c{sup 2}. (author)

  3. Testing and calibration through laser radiation and muon beams of the hadron calorimeter in ATLAS detector; Controle et etalonnage par lumiere laser et par faisceaux de muons du calorimetre hadronique a tuiles scintillantes d'ATLAS

    Energy Technology Data Exchange (ETDEWEB)

    Garde, V

    2003-10-15

    This study is dedicated to the calibration of the hadronic calorimeter (Tilecal) of the ATLAS detector. This detector will be installed on the LHC collider at CERN. The first data will be taken in 2007. This thesis is divided in two parts. The first part is dedicated to the study of the LASER system. A prototype of the final system was studied. It was shown that the stability and the linearity of this prototype are conform to the specification. Several studies were devoted to measurements which can be done on the Tilecal: The relative gain can be calculated and gives the stability of the Tilecal with a resolution of 0.35 %. The number of photoelectrons per charge unit has been calculated. The linearity was checked for a normal range of functioning and was corrected for the functioning at high charge. In both cases it was shown that the non-linearity was smaller than 0.5 %. The second study is devoted to muons beams in test beam periods. These results are used to find a calibration constant. Several problems which come from the difference of size cells are not totally solved. But the resolution of the calibration constant found by this method cannot exceed 2.3%. (author)

  4. Study of the signal H{sup 0}/A{sup 0} {yields} {tau}{mu} in hadron colliders and inter-calibration of the Ddiameter calorimeter with RUN 2 of Tevatron; Etude du signal H{sup 0}/A{sup 0} {yields} {tau}{mu} aux collisionneurs hadroniques et intercalibration du calorimetre de Ddiametre au RUN 2 du Tevatron

    Energy Technology Data Exchange (ETDEWEB)

    Delsart, P.A

    2003-10-01

    D0 is one of the 2 detectors settled on the Tevatron at Fermilab. This thesis has been made in collaboration with the 'theory' group and the D0 group of IPNL (nuclear physics institute of Lyon). Within the D0 group we have worked on the calibration of the detector's calorimeter: intercalibration. Using the fact that the physics is phi-symmetric in D0 we have created and applied statistical methods for a relative calibration of some phi-symmetric parts of the calorimeter. Work on particle physics concerned the two Higgs doublet model. In such models leptonic number violation is possible: we have simulated the H{sup 0}/A{sup 0} {yields} {tau}{mu} signal in order to study the discovery potential and the constraints on the coupling responsible for this decay. (author)

  5. Comparison of the Thermal Response of Two Calorimetric Cells Dedicated to Nuclear Heating Measurements during Calibration

    International Nuclear Information System (INIS)

    Nuclear heating is a key parameter which contributes to the thermal design and the quality of in-pile experiments performed in Material Testing Reactors (MTRs) for the study of nuclear materials and fuels under irradiation. Nuclear heating is typically measured in MTRs by radiometric calorimeters. However this kind of sensor has to be suited and improved in perspective of the new experimental conditions inside the channels of Jules Horowitz Reactor (JHR). In this paper, we study the responses of two non adiabatic differential calorimeter cells having the same geometric design, but different dimensions. These experimental works are carried out during a preliminary out-of-pile calibration operating procedure of these sensors which consists in simulating the sample heating by Joule effect. The influence of the imposed electrical power and of the forced cooling flow is determined on the sensor calibration curves. A more sensitive sensor leads to a quadratic calibration curve. This behavior difference of the two calorimetric configurations is explained by means of temperature and heat flux measurements performed with a new instrumented jacket. (authors)

  6. Calibration of the electromagnetic calorimeter of the Atlas detector: reconstruction of events with non-pointing photons in the frame of a GMSB supersymmetric model; Etalonnage du calorimetre electromagnetique du detecteur Atlas: reconstruction des evenements avec des photons non pointants das le cadre d'un modele supersymetrique GMSB

    Energy Technology Data Exchange (ETDEWEB)

    Prieur, D

    2005-04-15

    The analysis of test-beam data is focused on the calibration of the ATLAS electromagnetic calorimeter. An electrical model has been developed to predict the shape of the physics pulse out of the calibration signal in order to produce optimal filtering coefficients. They are used to compute energy while minimizing electronic noise and getting rid of any possible time shift. Using these coefficients, the uniformity response is 0.6%, in agreement with the 0.7% global constant term required for the whole calorimeter. The study of non pointing photon is driven by the detection of long lived neutralinos predicted by GMSB SUSY models. A systematic study with a detailed simulation of the ATLAS detector was performed to determine the electromagnetic calorimeter angular resolution for such photons. Results were used to parametrized the detector response and to reconstruct SUSY events from this model. (author)

  7. Thermal power calibrations of the IPR-R1 TRIGA reactor by the calorimetric and the heat balance methods

    International Nuclear Information System (INIS)

    Since the first nuclear reactor was built, a number of methodological variations have been evolved for the calibration of the reactor thermal power. Power monitoring of reactors is done by means of neutronic instruments, but its calibration is always done by thermal procedures. The purpose of this paper is to present the results of the thermal power calibration carried out on March 5th, 2009 in the IPR-R1 TRIGA reactor. It was used two procedures: the calorimetric and heat balance methods. The calorimetric procedure was done with the reactor operating at a constant power, with primary cooling system switched off. The rate of temperature rise of the water was recorded. The reactor power is calculate as a function of the temperature-rise rate and the system heat capacity constant. The heat balance procedure consists in the steady-state energy balance of the primary cooling loop of the reactor. For this balance, the inlet and outlet temperatures and the water flow in the primary cooling loop were measured. The heat transferred through the primary loop was added to the heat leakage from the reactor pool. The calorimetric method calibration presented a large uncertainty. The main source of error was the determination of the heat content of the system, due to a large uncertainty in the volume of the water in the system and a lack of homogenization of the water temperature. The heat balance calibration in the primary loop is the standard procedure for calibrating the power of the IPR-R1 TRIGA nuclear reactor. (author))

  8. Participation to the study of the electromagnetic calorimeter calibration for the CMS experiment and to the study of avalanche photodiodes; Participation a l'etude de la calibration du calorimetre electromagnetique de l'experience CMS et a l'etude de photodiodes a avalanche

    Energy Technology Data Exchange (ETDEWEB)

    Da Ponte Puill, V

    1999-12-13

    The electromagnetic calorimeter CMS (Compact Muon Solenoid) has been chosen to study the Higgs boson production. This calorimeter will be constituted of more than 80000 lead tungstate scintillating crystals radiation resistant. Photodiodes have been especially optimized to detect the scintillating light of these crystals: avalanche photodiodes (APD). This thesis includes two separate parts. A first part deals with the APD submitted to high rate of radiations and tested in the Ulysse reactor of the Cea. The second part deals with the calorimeter calibration. (A.L.B.)

  9. Calibration of inductive heating energy deposited on a cable-in-conduit conductor using a calorimetric method

    International Nuclear Information System (INIS)

    The inductive heating method is often used to originate initial normalcy in a stability experiment of a cable-in-conduit conductor (CICC). However, its magnitude cannot be evaluated easily. The calibration method to determine the CICC's inductive heating energy using a calorimetric technique was studied, and the inductive heating energies of two CICCs whose geometries were different from one another were successively evaluated applying this method. In addition, the experimental results show that the eddy currents in the strands and conduit electrically couple separately from one another and that this phenomenon affects the heating energy in the strands and conduit. The inductive heating energy in the strands and conduit was evaluated taking into account this effect. (J.P.N.)

  10. Search for the supersymmetric partner of the top quark in the channel stop anti-stop {yields} e{sup {+-}} {mu}{sup {+-}} sneutrino anti-sneutrino b anti-b in D0 experiment at the Tevatron. Calibration of the D0 electromagnetic calorimeter; Recherche du partenaire supersymetrique du quark top dans le canal stop anti-stop {yields} e{sup {+-}} {mu}{sup {+-}} sneutrino anti-sneutrino b anti-b au sein de l'experience D0 aupres du TeVatron. Calibration du calorimetre electromagnetique de D0

    Energy Technology Data Exchange (ETDEWEB)

    Mendes, A

    2006-10-15

    Symmetry is one of the most natural extensions of the standard model. At low energy it may consist in the Minimal Supersymmetric Standard Model which is the framework chosen to perform the search of the stop with 350 pb{sup -1} of data collected by D0 during the run-IIa period of the Tevatron. We selected the events with an electron, a muon, missing transverse energy and non-isolated tracks, signature for the stop decay in 3 particles (stop {yields} bl sneutrino). Since no significant excess of signal is seen, the results are interpreted in terms of limit on the stop production cross-sections, in such a way that we extend the existing exclusion region in the parameter space (m(stop), m(sneutrino)) up to stop masses of 168 (140) GeV for sneutrino masses of 50 (94) GeV. Finally, because of the crucial role of the electromagnetic calorimeter, a fine calibration was performed using Z {yields} e{sup +}e{sup -} events, which improved significantly the energy resolution. (author)

  11. Numerical and experimental calibration of calorimetric sample cell dedicated to nuclear heating measurements

    International Nuclear Information System (INIS)

    Online nuclear measurements inside experimental channels of MTRs are needed for experimental works (to design set-ups) and for numerical works (input data) in order to better understanding complex phenomena occurring during the accelerated ageing of materials and the irradiation of nuclear fuel. In this paper we focus only on one kind of measurements: nuclear heating performed by means of a radiometric calorimeter. The aims of numerical and experimental works are firstly to optimize the sensor response for new energy deposit ranges and then to miniaturize this sensor for JHR irradiation conditions A first calorimeter, developed previously by the CEA, is studied. It corresponds to a graphite differential calorimeter divided into two twin cells (a reference cell, and a sample one). It is used with a non adiabatic mode or heat flow mode. Experimental calibration of the sample cell is presented. In that case, energy deposit is simulated by Joule effect and the sample cell is inserted into a bath at a regulated temperature and controlled flow. The response of the sensor is shown versus electrical power imposed for two flow regimes (intensive or moderated forced convection). These experimental results are compared to numerical works and improvements are discussed. (authors)

  12. The Calvet calorimetric dosimeter

    International Nuclear Information System (INIS)

    This report describes a dosimeter based on the conduction calorimetry principle, and designed to operate in swimming-pool type nuclear reactors. The properties of the apparatus are as follows: 1 - the measurement is independent of the specific heat of the calorimetric elements; 2 - each calorimetric element is fitted with an electrical calibration; 3 - the apparatus is made up of two independent calorimetric elements; 4 - the nature of the calorimetric elements makes it possible to analyse the radiation received; 5 - the measurable intensities of the absorbed radiation vary from 4 to 4000 M/rads per hour; 6 - the sensitive part of the apparatus is fitted inside a cylinder 5 cm high and 2 cm in diameter. One pre-production unit made up of graphite and beryllium cores has been tried out in the reactor Siloe with radiation intensities of about 1 to 2 watts per gram. It absorbed an accumulated dose of 1.2*1O12 rads without any weaknesses appearing. (authors)

  13. Calibration of the electromagnetic barrel calorimeter. Identification of the tau leptons and search for a Higgs boson in the channel qqH {yields} qq {tau}{tau} in the Atlas experiment at LHC; Etalonnage du calorimetre electromagnetique tonneau. Identification des leptons taus et recherche d'un boson de Higgs dans le canal qqH {yields} qq {tau}{tau} dans l'experience ATLAS au LHC

    Energy Technology Data Exchange (ETDEWEB)

    Tarrade, F

    2006-09-15

    The Standard Model is the theory which describes the fundamental interactions most accurately. However, the Higgs mechanism and its associated boson have not yet been discovered. The ATLAS electromagnetic calorimeter will play an important role in its discovery if it exists. In the first part of this work, a final mapping of all barrel electromagnetic calorimeter cells, and in particular the problematic ones, was made. Then, the code for the calorimeter calibration was migrated into the ATLAS software environment (ATHENA), where it was tested and validated with the 2004 test beam data. In this code, the optimal filtering coefficients, which enable to reconstruct the energy deposited in the calorimeter while minimizing the electronic and pile-up noises, are calculated. For this, a model was developed to predict the physics signal waveform from the calibration waveform. In a third part, two algorithms for reconstructing and identifying {tau} leptons in their hadronic decay mode were studied and compared. Finally in a fourth part, one amongst the most important Standard Model Higgs production and decay channels was investigated, namely the weak boson fusion production followed by the Higgs decay into a tau lepton pair, for a low mass Higgs (115 < m{sub Higgs} < 145 GeV/c{sup 2}). This study was performed for 30 fb{sup -1} of integrated luminosity using fast and fully simulated data. A study of the dominant background Z + n jets (n {<=} 5) was also performed. (author)

  14. Top quark studies with Atlas at the LHC. Electromagnetic calorimeter commissioning; Etude du quark top avec Atlas au LHC. Mise en route du calorimetre electromagnetique

    Energy Technology Data Exchange (ETDEWEB)

    Resende Vaz de Melo Xavier, B

    2007-05-15

    The first proton-proton collisions in the Large Hadron Collider at CERN will take place on 2007. It aims at understanding the origins of mass. and it will also look for new physics. The ATLAS experiment will exploit all those physics potentialities. using a multilayer generalist detector. Quark top studies will be an important step in ATLAS physics program: its properties may reveal hints of new phenomena. One way to look for new physics is through quark top and W boson polarizations. which are studied here. This detailed simulation study has confirmed previous fast simulation results including extensive systematics estimation. ATLAS should thus yield a precision of a few percents with 10 fb{sup -1} of data. that is a year of LHC working. This precision is sufficient to select among several new physics models. Among ATLAS subsystems, the electromagnetic calorimeter plays a crucial role in the characterisation of electrons and photons. which are used in particular for the Higgs boson search. This document deals with the calorimeter commissioning as the time of the first collisions approaches. The detector itself and its electronics will be described, as well as its installation and calibration. Cosmic muons observation will then be presented. as the first overall test of the reading and reconstruction electronics chain in actual working conditions. (author)

  15. Comparison and qualification of FFTF calorimetric methods

    International Nuclear Information System (INIS)

    The Fast Flux Test Facility (FFTF) uses reactor thermal power based on secondary system calorimetric calculations as the standard for calibration of nuclear power channels and safety system trip settings, and as the true reactor power for other purposes. During the startup testing of the FFTF Heat Transport System (summer 1978), it was discovered that Secondary Sodium Loops 2 and 3 have brief, randomly-occurring flow reductions. Subsequent analysis indicated these flow reductions could cause errors of several percent in the thermal power calorimetric calculations. Such an error is unacceptable. It was ultimately decided that a digital filtering approach would be taken to resolve the calorimetric problem. This paper will describe how the calorimetric calculations are performed and used at the FFTF, the nature of the problem produced by the flow reductions, the analysis done to resolve the problem, and the success achieved by that resolution

  16. Device for calorimetric measurement

    Science.gov (United States)

    King, William P; Lee, Jungchul

    2015-01-13

    In one aspect, provided herein is a single crystal silicon microcalorimeter, for example useful for high temperature operation and long-term stability of calorimetric measurements. Microcalorimeters described herein include microcalorimeter embodiments having a suspended structure and comprising single crystal silicon. Also provided herein are methods for making calorimetric measurements, for example, on small quantities of materials or for determining the energy content of combustible material having an unknown composition.

  17. Qualification of an out-of-pile Thermohydraulic test Bench (BETHY) developed to calibrate calorimetric cells under specific JHR experimental conditions

    International Nuclear Information System (INIS)

    Online in-pile measurement methods are crucial during irradiations in material testing reactors to better understand the behavior of materials under accelerated ageing conditions and of nuclear fuels under high irradiation levels. Thus, the construction of a new Material Testing Reactor such as the Jules Horowitz Reactor (JHR) leads to new research and development programs devoted to innovative instrumentation and measurement methods. The presented works are performed in the framework of the IN-CORE program, 'Instrumentation for Nuclear radiations and Calorimetry Online in Reactor', between CEA and Aix-Marseille University. The program aim is to develop experimental devices and test bench to quantify more precisely the nuclear heating parameter in the JHR experimental channels. This in-pile parameter is usually measured by means of calorimeter or gamma thermometer. This paper focuses on a new out-of-pile test bench called BETHY. This bench was developed to study the response of a differential calorimeter during its preliminary calibration step according to specific thermal and hydraulic conditions occurring inside one type of JHR core channel. The first section of this paper is dedicated to a detailed description of the bench. The second part presents the study of the thermal characteristics established in the bench for two main thermal running modes. The last one concerns the calibration curve of the reference cell of the differential calorimeter in the case of homogenous temperature. (authors)

  18. Study of the optical monitoring system of the scintillating crystal involved in the electromagnetic calorimeter of CMS experiment; Etude du systeme de suivi optique des cristaux scintillants du calorimetre electromagnetique de l`experience CMS

    Energy Technology Data Exchange (ETDEWEB)

    Geleoc, M

    1998-09-04

    The prospect of the experimental discovery of the Higgs boson is one of the motivations to build the large hadron collider (LHC). Proton beams will collide and the emitted particles will be detected by ATLAS and CMS equipment. In each detector the electromagnetic calorimeter will allow the characterisation of the 2 photons coming from one of the disintegration channels of the Higgs boson. CMS collaboration has chosen an homogeneous calorimeter fitted with PbWO{sub 4} crystals. Each crystal with its photodetector and its electronic device forms one detection channel. The resolution of the detection channels should not deteriorate all along the operating time. The optical monitoring system of the crystals logs then controls the response of each detection channel in order to allow an accurate calibration of the calorimeter. The optical properties, the resistance to irradiation of PbWO{sub 4} crystals and the modelling of light collection are investigated in this work. The description of the different components of the optical monitoring system highlights the technical difficulties we had to challenge. An experimental testing bench has been set up to study the coupling between the scintillation signal and the signal that feeds the monitoring system, this coupling has been studied under irradiation in the conditions of CMS operating. (A.C.) 94 refs.

  19. Prototype of calorimetric flow microsensor

    Science.gov (United States)

    Sazhin, Oleg

    2012-11-01

    An analytical model of calorimetric flow sensor has been developed. The results of the application of this model are utilized to develop a calorimetric flow microsensor with optimal functional characteristics. The technology to manufacture the microsensor is described. A prototype of the microsensor suitable to be used in the mass air flow meter has been designed. The basic characteristics of the microsensor are presented.

  20. Calorimetric dosimetry of reactor radiation

    International Nuclear Information System (INIS)

    Calorimetric dosimetry of reactor radiation is relatively new reactor dosimetry method and the number of relevant papers is rather small. Some difficulties in applying standard methods (chemical dosemeters, ionization chambers) exist because of the complexity of radiation. In general application of calorimetric dosemeters for measuring absorbed doses is most precise. In addition to adequate choice of calorimetric bodies there is a possibility of determining the yields of each component of the radiation mixture in the total absorbed dose. This paper contains a short review of the basic calorimetry methods and some results of measurements at the RA reactor in Vinca performed by isothermal calorimeter

  1. Calage thermodynamique du point mort haut des moteurs à piston Thermodynamic Calibration of Top Dead Center in Piston Engines

    Directory of Open Access Journals (Sweden)

    Pinchon P.

    2006-11-01

    Full Text Available Lorsqu'on utilise un système d'acquisition rapide de données sur moteur, il se pose souvent le problème d'associer des grandeurs calculées, comme le volume de la chambre de combustion, à des grandeurs mesurées comme la pression dans le cylindre. II est alors indispensable de synchroniser avec une grande précision absolue ces deux grandeurs en repérant avec soin au moins un point de référence de la cinématique bielle-manivelle. Dans la méthode développée ici on a choisi de déterminer la position angulaire du vilebrequin correspondant au Point Mort Haut (PMH grâce à l'exploitation du signal de pression-cylindre acquis en compression-détente sans combustion, le moteur étant entraîné en rotation. Le principe du calage consiste à calculer l'écart existant entre le PMH et l'angle de la pression maximale qui est aisément repérable. Basée sur des considérations thermodynamiques théoriques, cette méthode de calage a été testée avec succès au cours d'essais effectués sur divers moteurs dont on a fait varier en particulier le rapport volumétrique, le remplissage et les pertes à la segmentation. La précision de la méthode est de l'ordre de 1/10e de degré de rotation vilebrequin. When a fast data-acquisition system is used for an engine, the problem often arises of associating both calculated data, such as combustion chamber volume, and measured data, such as pressure inside the cylinder. It then becomes indispensable to synchronize these two data with great absolute accuracy by carefully determining at least a reference point in the kinematics of the connecting-rod/crank shaft assembly. In the method developed here, we have chosen to determine the angular position of the crankshaft corresponding to top dead center (TDC by making use of the cylinder-pressure signal recorded during compression/expansion without combustion for motored engine. The calibration principle consists in calculating the shift between TDC and the

  2. Thermal Analysis of Calorimetric Systems

    Science.gov (United States)

    D'Aulerio, L.; Violante, V.; Castagna, E.; Fiore, R.; Capobianco, L.; Del Prete, Pr.; Tanzella, F.; McKubre, M.

    Calorimetric analysis has been carried out for both electrochemical and gas loading experiment. A finite element modeling for steady state and transient gave a satisfactory agreement with the experimental results. For electrochemical cells modeling was applied for isoperibolic and flow calorimeters with the main goal to optimize the system. For high-temperature gas loading experiments the modeling was applied to translate the temperature field (steady state and transient three-dimensional analysis), then, in such a case calculations allowed to perform the calorimetry. This experiment was a replication of the MATRIX experiment performed at SRI by some of the authors.1,2 A correlation between 4He production and excess of power during gas loading of deuterium in palladium was observed. Excess of power was estimated by means of the temperature measurements and by comparing experimental data with both the calibration data and the modeling results. Also the effect of the room temperature evolution was considered in the mathematical model of the experiment. 4He tights stainless steel cell have been filled first with a Pd-based catalyst then loaded with deuterium or hydrogen (blank). After filling cells with gas we observed a different thermal behavior of the cells C1 and C2 containing deuterium, compared to the cell C4 containing hydrogen. The temperature increasing in cells C1 and C2 was estimated to be produced by an additional power source of 0.1 W. The measured excess of helium was consistent with expected value obtained by assuming that the excess of energy was produced by a D+D reaction giving 4He+heat (24 MeV). The slope of the temperature increasing was larger in cells C1 and C2, and after achieving a stationary condition for the system the temperature of cells C1 and C2 increased again. During the thermal effect an analysis of the gas was done for the cells C1 and C2. An increasing of the helium content was revealed for both the cells. The He concentration

  3. Measurement of the calorimetric energy scale in MINOS

    Energy Technology Data Exchange (ETDEWEB)

    Hartnell, Jeffrey J.

    2005-06-01

    MINOS is a long-baseline neutrino oscillation experiment. A neutrino beam is created at the Fermi National Accelerator Laboratory in Illinois and fired down through the Earth. Measurements of the energy spectra and composition of the neutrino beam are made both at the source using the Near detector and 735 km away at the Soudan Underground Laboratory in Minnesota using the Far detector. By comparing the spectrum and flavour composition of the neutrino beam between the two detectors neutrino oscillations can be observed. Such a comparison depends on the accuracy of the relative calorimetric energy scale. This thesis details a precise measurement of the calorimetric energy scale of the MINOS Far detector and Calibration detector using stopping muons with a new ''track window'' technique. These measurements are used to perform the relative calibration between the two detectors. This calibration has been accomplished to 1.7% in data and to significantly better than 2% in the Monte Carlo simulation, thus achieving the MINOS relative calibration target of 2%. A number of cross-checks have been performed to ensure the robustness of the calorimetric energy scale measurements. At the Calibration detector the test-beam energy between run periods is found to be consistent with the detector response to better than 2% after the relative calibration is applied. The muon energy loss in the MINOS detectors determined from Bethe-Bloch predictions, data and Monte Carlo are compared and understood. To estimate the systematic error on the measurement of the neutrino oscillation parameters caused by a relative miscalibration a study is performed. A 2% relative miscalibration is shown to cause a 0.6% bias in the values of {Delta}m{sup 2} and sin{sup 2}(2{theta}).

  4. Calorimetric assay of minor actinides

    Energy Technology Data Exchange (ETDEWEB)

    Rudy, C.; Bracken, D.; Cremers, T.; Foster, L.A.; Ensslin, N.

    1996-12-31

    This paper reviews the principles of calorimetric assay and evaluates its potential application to the minor actinides (U-232-4, Am-241, Am- 243, Cm-245, Np-237). We conclude that calorimetry and high- resolution gamma-ray isotopic analysis can be used for the assay of minor actinides by adapting existing methodologies for Pu/Am-241 mixtures. In some cases, mixtures of special nuclear materials and minor actinides may require the development of new methodologies that involve a combination of destructive and nondestructive assay techniques.

  5. Calorimetric assay of minor actinides

    International Nuclear Information System (INIS)

    This paper reviews the principles of calorimetric assay and evaluates its potential application to the minor actinides (U-232-4, Am-241, Am- 243, Cm-245, Np-237). We conclude that calorimetry and high- resolution gamma-ray isotopic analysis can be used for the assay of minor actinides by adapting existing methodologies for Pu/Am-241 mixtures. In some cases, mixtures of special nuclear materials and minor actinides may require the development of new methodologies that involve a combination of destructive and nondestructive assay techniques

  6. A calorimetric system based on the LKB 10700-1 flow microcalorimeter

    International Nuclear Information System (INIS)

    An electrically calibrated and computer-controlled apparatus based on the LKB 10700-1 flow microcalorimeter was set up and tested by determining the enthalpies of dilution of aqueous solutions of sucrose and HCl at 298.15 K. The obtained results are in good agreement with the corresponding reference values recommended in the literature. The quality of the calorimetric signal in terms of noise, linearity and baseline drift, and the instrument time constant were analyzed. Also investigated were the influences of the flow rate and of the viscosity of the calorimetric liquid on the position of the baseline. The new calibration system enables powers ∼25 times smaller than those possible with the original one to be released inside the calorimetric cells. Electrical calibrations carried out with water as the sole calorimetric liquid indicated that the precision of the calibration constant, ε, quickly improved from ∼9% to ∼0.4% with the increase of the input power, P, from ∼2 µW to ∼50 µW, and stabilized at ∼0.1% for P ≥ 100 µW. The calibration constant was also found to linearly increase with the flow rate of the calorimetric liquid and to vary by less than 1% over a period of eight months under similar experimental conditions. Finally a new experimental procedure for heat of dilution measurements, which combines calibration and experiment in a single run, was evaluated. This method allows a significant economy in experiment time with apparently no accuracy loss relative to the conventional procedure recommended in the literature

  7. Calorimetric measurements of losses in HTS cables

    DEFF Research Database (Denmark)

    Tønnesen, Ole; Veje, Niels Erling Winsløv; Rasmussen, Carsten;

    2001-01-01

    A calorimetric test rig is used to investigate various loss components in a 10 m long superconducting cable model. A calorimetric technique, based on thermocouple measurements, is used to measure the losses of the 10 m long superconducting cable model. The current dependent losses are also measured...... electrically and compared with the losses obtained with the calorimetric method. The results obtained by the two methods are consistent. Based on an I2 (current) fitting procedure, the loss, caused by the eddy current generated in the stainless steel cryostat housing, and the hysteresis loss generated in the...

  8. Calorimetric method for determination of {sup 51}Cr neutrino source activity

    Energy Technology Data Exchange (ETDEWEB)

    Veretenkin, E. P., E-mail: veretenk@inr.ru; Gavrin, V. N.; Danshin, S. N.; Ibragimova, T. V.; Kozlova, Yu. P.; Mirmov, I. N. [Russian Academy of Sciences, Institute for Nuclear Research (Russian Federation)

    2015-12-15

    Experimental study of nonstandard neutrino properties using high-intensity artificial neutrino sources requires the activity of the sources to be determined with high accuracy. In the BEST project, a calorimetric system for measurement of the activity of high-intensity (a few MCi) neutrino sources based on {sup 51}Cr with an accuracy of 0.5–1% is created. In the paper, the main factors affecting the accuracy of determining the neutrino source activity are discussed. The calorimetric system design and the calibration results using a thermal simulator of the source are presented.

  9. Calorimetric study of cationic photopolymerization

    International Nuclear Information System (INIS)

    The photopolymerization of penta-erythritol tetra-glycidyl ether (initiator Degacure KI-85) was studied by a du Pont 910 type DSC. From our experimental results the following conclusions can be drawn: (1) During the cationic polymerization reaction the lifetime of the initiating centers are long compared to the lifetime of free radicals in case of radical polymerization. (2) The rate of deactivation of the initiating centers increases with increasing temperature. (author)

  10. On line measurement systems for calorimetric measurements

    International Nuclear Information System (INIS)

    The development of on-line measurement systems for calorimetric measurements for the last twenty years is traced and an attempt of their classification according to the automation level and hardware unification degree is undertaken. Main attention is given to the structure of variuos types of the above systems and the role of computers as a control and calculating device in the system. The methodic problems are considered in brief. Semiautomatic measurement systems for calorimetric measurements on the base of simple controllers, the systems with one or several mini- and microcomputers on-line with an experimental installation as well as the systems with various types of interface buses (CAMAC, IEEE 488, Multibus) are described. Tendencies in the development of the measurement systems related with application of microprocessors into computer and measuring engineering and possible prospects of the on-line measurement systems for calorimetric measurements as a specific variety of on-line systems for physical experiments are considered

  11. Etude de la diagraphie neutron du granite de Beauvoir. Effet neutron des altérations et de la matrice du granite. Calibration granite. Porosité totale à l'eau et porosité neutron Analysis of the Beauvoir Granite Neutron Log. Neutron Effect of Alterations and of the Granite Matrix. Granite Calibration. Total Water Porosity and Neutron Porosity

    Directory of Open Access Journals (Sweden)

    Galle C.

    2006-11-01

    Full Text Available Cet article rend compte des travaux effectués sur la porosité du granite de Beauvoir (Sondage GPF 1 d'Echassières, Massif Central français. L'objectif de notre étude est de pouvoir obtenir des valeurs représentatives de la saturation en eau (porosité totale à l'eau n du granite de Beauvoir à partir des mesures de porosité neutron PorositéN (diagraphie neutron BRGM sans avoir recours aux mesures sur carottes. Notre démarche est expérimentale et nous avons tenté d'approfondir certains problèmes liés à l'utilisation de la diagraphie neutron dans une roche granitique. Deux facteurs principaux conditionnent la réponse neutron : la concentration en hydrogène de la formation (eau libre et eau de constitution de certains minéraux et la présence d'éléments absorbeurs à forte section de capture comme le gadolinium, le cadmium, le bore, . . . et dans le cas du granite de Beauvoir, le lithium. A partir des mesures de porosité totale à l'eau n sur carottes, des essais de pertes au feu sur poudre qui nous permettent de déterminer la porosité neutron liée à l'eau de constitution PorositéN(OH- et des analyses chimiques avec lesquelles nous évaluons la porosité neutron thermique PorositéN(ox (Programme SNUPAR, Schlumberger liée à la capture neutronique, nous reconstituons la porosité neutron totale PorositéNR du granite de Beauvoir. Pour 7 échantillons caractéristiques du granite de Beauvoir, nous réalisons grâce à ces résultats une nouvelle calibration du taux de comptage neutron initial corrigé du gradient thermique et de l'effet de trou. Grâce à cette opération, il est possible de déterminer, pour les échantillons traités, la porosité neutron du granite avec une calibration granite (PorositéNg et non calcaire (PorositéNc. La connaissance de l'effet neutron de la matrice nous permet enfin d'évaluer la teneur en eau du granite (porosité totale à l'eau et de comparer celle-ci avec la porosité mesurée sur

  12. Calorimetric Measuring Systems for Characterizing High Frequency Power Losses in Power Electronic Components and Systems

    DEFF Research Database (Denmark)

    Blaabjerg, Frede; Pedersen, John Kim; Ritchie, Andrew Ewen

    2002-01-01

    High frequency power losses in power electronic components and systems are very difficult to measure. The same applies to the efficiency of high-efficiency systems and components. An important method to measure losses with high accuracy is the calorimetric measuring systems. This paper describes...... two different calorimetric measuring systems, one for power losses up to 50 W and one for power losses up to 1500 W. These differ in size and also the systems which can be analysed. The basic concept of calorimetry is discussed and the overall performance of the two systems is specified. Methods to...... calibrate such systems are proposed and different applications of the system are given. Two practical examples end the description of the research. It is concluded that such systems have a relative long time-constant but they are accurate and useful for precise power loss measurement....

  13. Power calibrations for TRIGA reactors

    International Nuclear Information System (INIS)

    The purpose of this paper is to establish a framework for the calorimetric power calibration of TRIGA reactors so that reliable results can be obtained with a precision better than ± 5%. Careful application of the same procedures has produced power calibration results that have been reproducible to ± 1.5%. The procedures are equally applicable to the Mark I, Mark II and Mark III reactors as well as to reactors having much larger reactor tanks and to TRIGA reactors capable of forced cooling up to 3 MW in some cases and 15 MW in another case. In the case of forced cooled TRIGA reactors, the calorimetric power calibration is applicable in the natural convection mode for these reactors using exactly the same procedures as are discussed below for the smaller TRIGA reactors (< 2 MW)

  14. Optimization through neuron network of the potentiality of Higgs discovery in the CMS detector via H {yields} ZZ{sup *} {yields} 4e{sup {+-}}, and study of the triggering primitives of the electromagnetic calorimeter; Optimisation par reseaux de neurones du potentiel de decouverte du boson de Higgs dans le canal H {yields} ZZ{sup *} {yields} 4e{sup {+-}} sur le detecteur CMS, et etude des primitives de declenchement du calorimetre electromagnetique

    Energy Technology Data Exchange (ETDEWEB)

    Bimbot, St

    2006-10-15

    The first chapter presents the theoretical background on which the Higgs mechanism is based within the framework of the standard model. The second chapter reviews the past and present attempts aiming at the discovery of the Higgs boson. The specific features of the Large Hadron Collider (LHC) and of one of its detector: the CMS (Compact Muon Solenoid) detector are given in the third chapter. The author details the track detector and the ECAL electronic calorimeter that are key components of CMS in the detection of the Higgs boson via the following decay channel: H {yields} ZZ{sup *} {yields} 2e{sup +}2e{sup -} (where Z and Z{sup *} represents the Z{sup O} boson in a real state and in a virtual state respectively). The chapters 4 and 5 are dedicated to the calibration of the ECAL calorimeter via the use of an electron beam and to the triggering system. The data analysis that will lead to the reconstruction of the events detected by CMS is presented in the chapter 6. The last chapter is devoted to the optimization of the extraction of the Higgs boson signal from an abundant background noise. (A.C.)

  15. Neutrino mass calorimetric searches in the MARE experiment

    CERN Document Server

    Nucciotti, A

    2010-01-01

    The international project ``Microcalorimeter Arrays for a Rhenium Experiment'' (MARE) aims at the direct and calorimetric measurement of the electron neutrino mass with sub-electronvolt sensitivity. Calorimetric neutrino mass experiments measure all the energy released in a beta decay except for the energy carried away by the neutrino, therefore removing the most severe systematic uncertainties which have plagued the traditional and, so far, more sensitive spectrometers. Calorimetric measurements are best realized exploiting the thermal detection technique. This approach uses thermal microcalorimeters whose absorbers contain a low transition energy Q beta decaying isotope. To date the two best options are 187Re and 163Ho. While the first beta decays, the latter decays via electron capture, but both have a Q value around 2.5 keV. The potential of using 187Re for a calorimetric neutrino mass experiment has been already demonstrated. On the contrary, no calorimetric spectrum of 163Ho has been so far measured wit...

  16. Calorimetric method of ac loss measurement in a rotating magnetic field

    International Nuclear Information System (INIS)

    A method is described for calorimetric ac-loss measurements of high-Tc superconductors (HTS) at 80 K. It is based on a technique used at 4.2 K for conventional superconducting wires that allows an easy loss measurement in parallel or perpendicular external field orientation. This paper focuses on ac loss measurement setup and calibration in a rotating magnetic field. This experimental setup is to demonstrate measuring loss using a temperature rise method under the influence of a rotating magnetic field. The slight temperature increase of the sample in an ac-field is used as a measure of losses. The aim is to simulate the loss in rotating machines using HTS. This is a unique technique to measure total ac loss in HTS at power frequencies. The sample is mounted on to a cold finger extended from a liquid nitrogen heat exchanger (HEX). The thermal insulation between the HEX and sample is provided by a material of low thermal conductivity, and low eddy current heating sample holder in vacuum vessel. A temperature sensor and noninductive heater have been incorporated in the sample holder allowing a rapid sample change. The main part of the data is obtained in the calorimetric measurement is used for calibration. The focus is on the accuracy and calibrations required to predict the actual ac losses in HTS. This setup has the advantage of being able to measure the total ac loss under the influence of a continuous moving field as experienced by any rotating machines.

  17. Calorimetric method of ac loss measurement in a rotating magnetic field

    Energy Technology Data Exchange (ETDEWEB)

    Ghoshal, P. K. [Oxford Instruments NanoScience, Abingdon, Oxfordshire OX13 5QX (United Kingdom); Coombs, T. A.; Campbell, A. M. [Department of Engineering, Electrical Engineering, University of Cambridge, Cambridge CB3 0FA (United Kingdom)

    2010-07-15

    A method is described for calorimetric ac-loss measurements of high-T{sub c} superconductors (HTS) at 80 K. It is based on a technique used at 4.2 K for conventional superconducting wires that allows an easy loss measurement in parallel or perpendicular external field orientation. This paper focuses on ac loss measurement setup and calibration in a rotating magnetic field. This experimental setup is to demonstrate measuring loss using a temperature rise method under the influence of a rotating magnetic field. The slight temperature increase of the sample in an ac-field is used as a measure of losses. The aim is to simulate the loss in rotating machines using HTS. This is a unique technique to measure total ac loss in HTS at power frequencies. The sample is mounted on to a cold finger extended from a liquid nitrogen heat exchanger (HEX). The thermal insulation between the HEX and sample is provided by a material of low thermal conductivity, and low eddy current heating sample holder in vacuum vessel. A temperature sensor and noninductive heater have been incorporated in the sample holder allowing a rapid sample change. The main part of the data is obtained in the calorimetric measurement is used for calibration. The focus is on the accuracy and calibrations required to predict the actual ac losses in HTS. This setup has the advantage of being able to measure the total ac loss under the influence of a continuous moving field as experienced by any rotating machines.

  18. Calorimetric method of ac loss measurement in a rotating magnetic field

    Science.gov (United States)

    Ghoshal, P. K.; Coombs, T. A.; Campbell, A. M.

    2010-07-01

    A method is described for calorimetric ac-loss measurements of high-Tc superconductors (HTS) at 80 K. It is based on a technique used at 4.2 K for conventional superconducting wires that allows an easy loss measurement in parallel or perpendicular external field orientation. This paper focuses on ac loss measurement setup and calibration in a rotating magnetic field. This experimental setup is to demonstrate measuring loss using a temperature rise method under the influence of a rotating magnetic field. The slight temperature increase of the sample in an ac-field is used as a measure of losses. The aim is to simulate the loss in rotating machines using HTS. This is a unique technique to measure total ac loss in HTS at power frequencies. The sample is mounted on to a cold finger extended from a liquid nitrogen heat exchanger (HEX). The thermal insulation between the HEX and sample is provided by a material of low thermal conductivity, and low eddy current heating sample holder in vacuum vessel. A temperature sensor and noninductive heater have been incorporated in the sample holder allowing a rapid sample change. The main part of the data is obtained in the calorimetric measurement is used for calibration. The focus is on the accuracy and calibrations required to predict the actual ac losses in HTS. This setup has the advantage of being able to measure the total ac loss under the influence of a continuous moving field as experienced by any rotating machines.

  19. First results from the MINOS calibration detector

    CERN Document Server

    Vahle, P; Alner, J; Anderson, B; Attree, D; Barker, M; Belias, A; Crone, G; Durkin, T J; Felt, N; Falk, E; Harris, P; Jenner, L; Kordosky, M; Lang, K; Lebedev, A; Lee, R; Longley, N P; Marshak, M; Miyagawa, P; Michael, D G; Morse, R; Musser, J; Nichol, R; Nicholls, T; Oliver, J; Pearce, G; Petyt, D; Proga, M; Rebel, B; Saakyan, R; Smith, C; Sullivan, P; Thomas, J; Weber, A; Wojcicki, S G

    2002-01-01

    The MINOS calibration detector (CalDet) is a small version of the MINOS Near and Far neutrino detectors. A program of exposure to beams of muons, electrons, pions and protons at the CERN PS will provide calibration of the calorimetric and topological response of the Near and Far detectors. In this talk, we briefly discuss the goals and design of the CalDet and present first results from the initial beam exposure. (3 refs).

  20. The CALorimetric Electron Telescope, CALET, Mission

    Science.gov (United States)

    Torii, Shoji

    We are developing the CALorimetric Electron Telescope, CALET, mission for the Japanese Experiment Module Exposed Facility, JEM-EF, of the International Space Station. Major scientific objectives are to search for nearby cosmic ray sources and dark matter by carrying out a precise measurement of the electrons in GeV 20 TeV and the gamma-rays in 20 MeV TeV. CALET has a unique capability to observe electrons and gamma-rays over 1 TeV since the hadron rejection power is more than 105 and the energy resolution better than a few percent over 100 GeV. The detector consists of an Imaging Calorimeter (IMC) with scintillating fiber belts and tungsten plates, a Total Absorption Calorimeter (TASC) with BGO logs, a Silicon Pixel Array (SIA) and a Scintillator Anti-Coincidence System (SACS). CALET has also a capability to measure protons and nuclei in 10 GeV 1000 TeV, and will have a function to monitor solar activity and gamma-ray bursts with additional instruments. The phase A study has started on a schedule of launch in 2013 by H-II Transfer Vehicle (HTV) for 5 years observation.

  1. Neutrino mass calorimetric searches in the MARE experiment

    International Nuclear Information System (INIS)

    The international project “Microcalorimeter Arrays for a Rhenium Experiment” (MARE) aims at the direct and calorimetric measurement of the electron neutrino mass with sub-electronvolt sensitivity. Calorimetric neutrino mass experiments measure all the energy released in a beta decay except for the energy carried away by the neutrino, therefore removing the most severe systematic uncertainties which have plagued the traditional and, so far, more sensitive spectrometers. Calorimetric measurements are best realized exploiting the thermal detection technique. This approach uses thermal microcalorimeters whose absorbers contain a low transition energy Q beta decaying isotope. To date the two best options are 187Re and 163Ho. While the first beta decays, the latter decays via electron capture, but both have a Q value around 2.5 keV. The potential of using 187Re for a calorimetric neutrino mass experiment has been already demonstrated. On the contrary, no calorimetric spectrum of 163Ho has been so far measured with the precision required to set a useful limit on the neutrino mass. In this talk we present the status and the perspectives of the MARE project activities for the active isotope selection and the single channel development. We also discuss the neutrino mass statistical sensitivity achievable with both isotopes.

  2. Neutrino mass calorimetric searches in the MARE experiment

    Energy Technology Data Exchange (ETDEWEB)

    Nucciotti, A., E-mail: angelo.nucciotti@mib.infn.it [Universita di Milano-Bicocca e INFN Sezione di Milano-Bicocca, Milano (Italy)

    2012-08-15

    The international project 'Microcalorimeter Arrays for a Rhenium Experiment' (MARE) aims at the direct and calorimetric measurement of the electron neutrino mass with sub-electronvolt sensitivity. Calorimetric neutrino mass experiments measure all the energy released in a beta decay except for the energy carried away by the neutrino, therefore removing the most severe systematic uncertainties which have plagued the traditional and, so far, more sensitive spectrometers. Calorimetric measurements are best realized exploiting the thermal detection technique. This approach uses thermal microcalorimeters whose absorbers contain a low transition energy Q beta decaying isotope. To date the two best options are {sup 187}Re and {sup 163}Ho. While the first beta decays, the latter decays via electron capture, but both have a Q value around 2.5 keV. The potential of using {sup 187}Re for a calorimetric neutrino mass experiment has been already demonstrated. On the contrary, no calorimetric spectrum of {sup 163}Ho has been so far measured with the precision required to set a useful limit on the neutrino mass. In this talk we present the status and the perspectives of the MARE project activities for the active isotope selection and the single channel development. We also discuss the neutrino mass statistical sensitivity achievable with both isotopes.

  3. The CMS electromagnetic calorimeter and the search for the Higgs boson in the decay channel H {yields} WW{sup *} {yields} 2e2{nu}; Le calorimetre electromagnetique de CMS et la recherche du boson de Higgs dans le canal de desintegration H {yields} WW{sup *} {yields} 2e2{nu}

    Energy Technology Data Exchange (ETDEWEB)

    Rovelli, I.Ch

    2006-01-15

    CMS is one of the four experiments that will take data at the LHC. Large part of my work was devoted to the development of electron reconstruction tools aimed at improving the Higgs boson discovery potential in the H {yields} WW{sup *} {yields} 2e2{nu} channel. A major role in the electron reconstruction is played by the electromagnetic calorimeter ECAL, an homogeneous calorimeter made of scintillating PbWO{sub 4} crystals. The first 3 chapters give an overview of LHC and CMS.In chapter 4 the analysis of the data collected during the 2003 electromagnetic calorimeter test beam is presented. First the problem of the intercalibration at the test beam is addressed. This is a major task, since the precision of the intercalibration directly affects the constant term of the energy resolution, for which the CMS goal is to reach a precision better than 0.5%. The good initial intercalibration, anyway, could be spoiled during the data taking by the effects of the radiation on the crystals, which can change the relative responses of the channels. A monitoring laser system is foreseen at CMS. The possibility to check the calibration stability and to correct the changes in the response with a precision within the required limits is demonstrated. Chapter five describes the electron reconstruction and identification in CMS. A crucial problem for the electron reconstruction is represented by the Bremsstrahlung emission in the tracker. A tracking procedure dealing with the Bremsstrahlung energy loss is discussed. Together with an improvement in the reconstruction efficiency, the procedure allows to identify electrons with a small fraction of radiated energy, which can be usefully exploited for the ECAL calibration. The developed algorithms are applied in chapter 6, which presents the study of the CMS discovery potential of the Higgs boson in the H {yields} WW{sup *} {yields} 2e2{nu} channel. This is the discovery channel in the range of masses between 2m{sub W} and 2m{sub Z}. Here

  4. Calorimetric signature of structural heterogeneity in a ternary silicate glass

    DEFF Research Database (Denmark)

    Zhang, Yanfei; Yang, G.; Yue, Yuanzheng

    2013-01-01

    We investigate the structural heterogeneity in a silicate glass by hyperquenching–annealing–calorimetry approach. The results show a striking phenomenon: two separated sub-Tg relaxation peaks appear on the calorimetric curve of the hyperquenched CaO–MgO–SiO2 glass, implying the existence of two...

  5. Calorimetric measurement of strong γ emitting sources

    International Nuclear Information System (INIS)

    This publication gives the principle and a description of an adiabatic calorimeter for measuring the real activity of strong gamma-emitting sources by absorbing the emitted energy in a mass of copper. Because of the difficulty of evaluating the amount self- absorption, we have built a calorimeter for measuring the self- absorption, and a description of it is given.The results of these three measurements are fairly satisfactory. The calibration and the actual measurements obtained are given with a few corrections made necessary by the design of the apparatus. The correlation of the various results is discussed. (author)

  6. Study of performances of the liquid krypton calorimeter of the NA48 experiment for measurement of Re({epsilon}'/{epsilon}); Etude des performances du calorimetre a krypton liquide de l'experience NA48 pour la mesure de Re({epsilon}'/{epsilon})

    Energy Technology Data Exchange (ETDEWEB)

    Ocariz, Jose [Lab. de l' Accelerateur Lineaire, Paris-11 Univ., 91 - Orsay (France)

    1999-04-19

    The purpose of the NA48 experiment is the study of direct violation of CP symmetry in the system of neutral kaons. The double ratio of neutral and charged two pion decays, violating and conserving CP should be measured with an ultimate accuracy of about 0.1%. In attain this objective one of the important ingredients is the liquid krypton calorimeter, which allows to identify the neutral modes with a very good accuracy. One should therefore ensure that the systematic effects are weak. The performances of this calorimeter, particularly in energy response, are studied with data acquired in 1997. These studies are mainly effected for the K{sub e3} semileptonic decays by comparing the energy reconstructed in the calorimeter with the momentum obtained by the magnetic spectrometer. These data allow to constrain significantly the energy resolution, the response non-linearity as well as the detector geometry and to optimize the calibration. The energy resolution achieved is better than 1% for energies above 25 GeV. This allows to reduce the background in the neutral mode at the level of 0.1%. The systematic uncertainties from calorimeter on the measurement of double ratio are estimated for the 1997 data at 0.1%. This value is clearly below the statistical error of 0.27% for these data.

  7. Optimal calibration of nuclear instrumentation

    International Nuclear Information System (INIS)

    Accurate knowledge of core power level is essential for the safe and efficient operation of nuclear power plants. Ionization chambers located outside the reactor core have the necessary reliability and response time characteristics and have been used extensively to indicate power level. The calibration of the ion chamber, and associated nuclear instrumentation (NI), has traditionally been based on the thermal power in the secondary coolant system. The usual NI calibration procedure consists of establishing steady-state operating conditions, calorimetrically determining the power at the secondary side of the steam generator, and adjusting the NI output to correspond to the measured thermal power. This study addresses certain questions including; (a) what sampling rate should be employed, (b) how many measurements are required, and (c) how can additional power level related information such as primary coolant loop measurements and knowledge of plant dynamics be included in the calibration procedure

  8. An in-beam test study of the response of calorimeters in the ATLAS Experiment of LHC to charged pions of 3 to 350 GeV energy range; Etude en faisceau-test de la reponse des calorimetres de l'Experience ATLAS du LHC a des pions charges, d'energie comprise entre 3 et 350 Gev

    Energy Technology Data Exchange (ETDEWEB)

    Giangiobbe Vincent [Ecole Doctorale des Sciences Fondamentales, Universite Blaise Pascal, U.F.R de Recherches Scientifiques et Techniques, 34, avenue Carnot - BP 185, 63006 Clermont-Ferrand Cedex (France)

    2006-11-15

    ATLAS is one of the four main experiments under way of installing within the Large Hadron Project (LHC). LHC will provide two proton beams of high luminosity (1 x 10{sup 34} cm{sup -2} s{sup -1} at peak), colliding in the center of ATLAS detector at a 14 TeV rated COM energy. The aim of this study is an in-beam test characterization of the response of calorimeters in the central part of ATLAS. The study will be focused on the response to pions as main jet components. In the beginning a short presentation of the ATLAS program of physics is given enlightening the basic theoretical and experimental aspects of the experiment. A description of the ATLAS detector is also presented. The second chapter is devoted to detailed description of the central calorimetry of ATLAS. One starts from the mechanism of signal production in calorimeters, through the electronic processing up to the reconstruction of the released energy. The third chapter deals with the processing electronics of the TileCal hadron calorimeter the installation and certification at CERN of which was in charge of Clermont-Ferrand team. The chapter 4 gives a description of the SPS beam line and of the associated instrumentation tested in-beam in 2004. The chapters 6 and 7 are devoted to the study of the response of calorimeters to high energy pions (within 20 to 350 GeV range). The pion selection is described in the chapter 5. In the eighth chapter the calorimeter response to low energy pions (up to 9 GeV) is examined. In conclusion this study has shown that the data concerning pions obtained in-beam in 2004 are usable for energies within 3 to 350 GeV. The response and the energy resolution of LAr and TileCal were measured with a satisfactory accuracy,. A systematic comparison of these results with simulations (in the configuration of in-beam test) can now be done. Should the agreement be satisfying, the modelling could be used for the study of calibration of calorimeter response for the case of works with the

  9. Study of the calorimetric methods for radiation dosimetry

    International Nuclear Information System (INIS)

    Calorimetric techniques of radiation measurement were developed with self-designed calorimeters in Romania. Various experimental arrangements with calorimeters have been made in order to improve its accuracy for the measurement of radiation intensity and absorbed doses. A total energy absorption calorimeter was built and tested for the determination of the half-life of radioactive source (Polonium, alfa emitter) placed in the calorimeter. A water calorimeter was also designed to measure absorbed doses

  10. Development of a calorimetric system for electron beam dosimetry in radiation processing

    International Nuclear Information System (INIS)

    A calorimetric system for electron beam dosimetry in radiation processing was developed. The system is composed of a graphite core calorimeter, the temperature measuring and electrical calibrating instrumentation, a microcomputer and the software for the system automation. The research aimed at the optimization of the project parameters, the development of advanced methodologies for calibrating the temperature sensor, the determination of the thermal capacity as a function of the temperature, the measurement of the absorbed dose, and the development of the software needed for the system operation. The operating range extends from 0.1 kGy to 30 kGy. The uncertainty in the measurement of the absorbed dose was estimated to be ± 1.8% at the 95% confidence level. Comparative tests of the absorbed dose measurements were made using the IPEN electron accelerator. The results obtained showed an excellent agreement between the absorbed dose determined by the calorimeter and the absorbed dose calculated from the nominal power delivered by the accelerator. (author). 67 refs, 63 figs, 2 tabs

  11. New methodology for simultaneous volumetric and calorimetric measurements: Direct determination of {alpha}{sub p} and C{sub p} for liquids under pressure

    Energy Technology Data Exchange (ETDEWEB)

    Casas, L. M. [Departamento de Fisica Aplicada, Facultad de Ciencias Experimentales, Universidad de Vigo, Lagoas Marcosende s/n, 36310 Vigo (Spain); Plantier, F.; Bessieres, D. [Laboratoire de Thermodynamique et Energetique des Fluides Complexes-UMR 5150, Universite de Pau et des Pays de l' Adour, BP 1155, 64013 Pau (France)

    2009-12-15

    A new batch cell has been developed to measure simultaneously both isobaric thermal expansion and isobaric heat capacity from calorimetric measurements. The isobaric thermal expansion is directly proportional to the linear displacement of an inner flexible below and the heat capacity is calculated from the calorimetric signal. The apparatus used was a commercial Setaram C-80 calorimeter and together with this type of vessels can be operated up to 20 MPa and in the temperature range of 303.15-523.15 K, In this work, calibration was carried out using 1-hexanol and subsequently both thermophysical properties were determined for 3-pentanol, 3-ethyl-3-pentanol, and 1-octanol at atmospheric pressure, 5 and 10 MPa, and from 303.15 to 423.15 K in temperature. Finally experimental values were compared with the literature in order to validate this new methodology, which allows a very accurate determination of isobaric thermal expansion and isobaric heat capacity.

  12. Fast electron thermometry towards ultra-sensitive calorimetric detection

    OpenAIRE

    Gasparinetti, S.; Viisanen, K. L.; Saira, O. -P.; Faivre, T.; Arzeo, M.; Meschke, M.; Pekola, J. P.

    2014-01-01

    We demonstrate radiofrequency thermometry on a micrometer-sized metallic island below 100 mK. Our device is based on a normal metal-insulator-superconductor tunnel junction coupled to a resonator with transmission readout. In the first generation of the device, we achieve 90 {\\mu}K/Hz^1/2 noise-equivalent temperature with 10 MHz bandwidth. We measure the thermal relaxation time of the electron gas in the island, which we find to be of the order of 100 {\\mu}s. Such a calorimetric detector, upo...

  13. COMPASS calorimetric trigger in 2012 run: motivation and implementation

    International Nuclear Information System (INIS)

    For the COMPASS experiment at CERN a dedicated run for studies on chiral perturbation theory is planned for 2012. By impinging pions to a Nickel target, at very low momentum transfer, final states containing an outgoing photon or neutral pions are produced. In order to select these events a new calorimetric trigger, reusing the already existing readout electronics, is implemented. A backplane module as well as a central trigger module is developed on which the hits form the individual cells are collected and further processing is done. The implementation as well as the first test results is presented.

  14. Quantitative schlieren diagnostics for the determination of ambient species density, gas temperature and calorimetric power of cold atmospheric plasma jets

    Science.gov (United States)

    Schmidt-Bleker, A.; Reuter, S.; Weltmann, K.-D.

    2015-05-01

    A measurement and evaluation technique for performing quantitative Schlieren diagnostics on an argon-operated cold atmospheric plasma jet is presented. Combined with computational fluid dynamics simulations, the method not only yields the temporally averaged ambient air density and temperature in the effluent of the fully turbulent jet, but also allows for an estimation of the calorimetric power deposited by the plasma. The change of the refractive index due to mixing of argon and air is in the same range as caused by the temperature increase of less than 35 K in the effluent of the plasma jet. The Schlieren contrast therefore needs to be corrected for the contribution from ambient air diffusion. The Schlieren system can be calibrated accurately using the signal obtained from the argon flow when the plasma is turned off. The temperature measured in this way is compared to the value obtained using a fibre-optics temperature probe and shows excellent agreement. By fitting a heat source in a fluid dynamics simulation to match the measured temperature field, the calorimetric power deposited by the plasma jet can be estimated as 1.1 W.

  15. Quantitative schlieren diagnostics for the determination of ambient species density, gas temperature and calorimetric power of cold atmospheric plasma jets

    International Nuclear Information System (INIS)

    A measurement and evaluation technique for performing quantitative Schlieren diagnostics on an argon-operated cold atmospheric plasma jet is presented. Combined with computational fluid dynamics simulations, the method not only yields the temporally averaged ambient air density and temperature in the effluent of the fully turbulent jet, but also allows for an estimation of the calorimetric power deposited by the plasma.The change of the refractive index due to mixing of argon and air is in the same range as caused by the temperature increase of less than 35 K in the effluent of the plasma jet. The Schlieren contrast therefore needs to be corrected for the contribution from ambient air diffusion. The Schlieren system can be calibrated accurately using the signal obtained from the argon flow when the plasma is turned off. The temperature measured in this way is compared to the value obtained using a fibre-optics temperature probe and shows excellent agreement. By fitting a heat source in a fluid dynamics simulation to match the measured temperature field, the calorimetric power deposited by the plasma jet can be estimated as 1.1 W. (paper)

  16. Calorimetric monitoring of the serum proteome in schizophrenia patients

    International Nuclear Information System (INIS)

    Highlights: • DSC reveals modified thermal behavior of blood serum from schizophrenic patients. • The high-abundance portion of the serum proteome is thermally stabilized in Sz. • The Sz plasma thermograms are classified in four distinct calorimetric groups. • The effectiveness of drug treatment correlates with the plasma thermodynamic behavior. - Abstract: Schizophrenia (Sz) is a multifactorial mental disorder with high frequency. Due to its chronic and relapsing nature there is a strong need for biomarkers for early psychosis detection and objective evaluation of drug (usually antipsychotics) treatment effect. Here differential scanning calorimetry (DSC) is applied to thermodynamically characterize the blood serum proteome of paranoid schizophrenia patients on routine antipsychotic treatment in comparison to healthy controls. DSC revealed significant modifications in the thermodynamic behavior of blood sera from Sz patients, the overall thermal profile being changed in all Sz cases under study. The calorimetric profiles were classified in four distinct groups, reflecting different thermal stabilization of the high-abundance portion of the serum proteome. The observed positive (thermograms becoming closer to the healthy profile) or negative (thermograms deviating stronger from the healthy profile) proteome thermal stability switches and the Sz thermograms persistence in patients’ follow-up corresponded well with the effect of drug treatment

  17. Calorimetric monitoring of the serum proteome in schizophrenia patients

    Energy Technology Data Exchange (ETDEWEB)

    Krumova, Sashka [Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 21, Sofia 1113 (Bulgaria); Rukova, Blaga [Department of Medical Genetics, Medical University of Sofia, 2 Zdrave Str., Sofia 1431 (Bulgaria); Todinova, Svetla [Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 21, Sofia 1113 (Bulgaria); Gartcheva, Lidia [National Specialized Hospital for Active Treating of Haematological Diseases, 6 Plovdivsko pole Str., Sofia 1756 (Bulgaria); Milanova, Vihra [Department of Psychiatry, Medical University of Sofia, 1 Sv. Georgi Sofiiski Str., Sofia 1431 (Bulgaria); Toncheva, Draga [Department of Medical Genetics, Medical University of Sofia, 2 Zdrave Str., Sofia 1431 (Bulgaria); Taneva, Stefka G., E-mail: stefka.germanova@ehu.es [Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 21, Sofia 1113 (Bulgaria)

    2013-11-20

    Highlights: • DSC reveals modified thermal behavior of blood serum from schizophrenic patients. • The high-abundance portion of the serum proteome is thermally stabilized in Sz. • The Sz plasma thermograms are classified in four distinct calorimetric groups. • The effectiveness of drug treatment correlates with the plasma thermodynamic behavior. - Abstract: Schizophrenia (Sz) is a multifactorial mental disorder with high frequency. Due to its chronic and relapsing nature there is a strong need for biomarkers for early psychosis detection and objective evaluation of drug (usually antipsychotics) treatment effect. Here differential scanning calorimetry (DSC) is applied to thermodynamically characterize the blood serum proteome of paranoid schizophrenia patients on routine antipsychotic treatment in comparison to healthy controls. DSC revealed significant modifications in the thermodynamic behavior of blood sera from Sz patients, the overall thermal profile being changed in all Sz cases under study. The calorimetric profiles were classified in four distinct groups, reflecting different thermal stabilization of the high-abundance portion of the serum proteome. The observed positive (thermograms becoming closer to the healthy profile) or negative (thermograms deviating stronger from the healthy profile) proteome thermal stability switches and the Sz thermograms persistence in patients’ follow-up corresponded well with the effect of drug treatment.

  18. Calorimetric low temperature detectors for heavy ion physics

    International Nuclear Information System (INIS)

    Calorimetric low temperature detectors have the potential to become powerful tools for applications in many fields of heavy ion physics. A brief overview of heavy ion physics at present and at the next generation heavy ion facilities is given with a special emphasis on the conditions for heavy ion detection and the potential advantage of cryogenic detectors for applications in heavy ion physics. Two types of calorimetric low temperature detectors for the detection of energetic heavy ions have been developed and their response to the impact of heavy ions was investigated systematically for a wide range of energies (E=0.1-360 MeV/amu) and ion species (4He.. 238U). Excellent results with respect to energy resolution, ΔE/E ranging from 1 to 5 x 10-3 even for the heaviest ions, and other basic detector properties such as energy linearity with no indication of a pulse height defect, energy threshold, detection efficiency and radiation hardness have been obtained, representing a considerable improvement as compared to conventional heavy ion detectors based on ionization. With the achieved performance, calorimetric low temperature detectors bear a large potential for applications in various fields of basic and applied heavy ion research. A brief overview of a few prominent examples, such as high resolution nuclear spectroscopy, high resolution nuclear mass determination, which may be favourably used for identification of superheavy elements or in direct reaction experiments with radioactive beams, as well as background discrimination in accelerator mass spectrometry, is given, and first results are presented. For instance, the use of cryogenic detectors allowed to improve the sensitivity in trace analysis of 236U by one order of magnitude and to determine the up to date smallest isotope ratio of 236U/238U = 6.1 x 10-12 in a sample of natural uranium. Besides the detection of heavy ions, the concept of cryogenic detectors also provides considerable advantage for X

  19. A Calorimetric Assay For Enzymatic Saccharification Of Biomass

    DEFF Research Database (Denmark)

    Murphy, Leigh; Borch, Kim; McFarland, K.C.;

    2010-01-01

    types, and that the calorimetric signal scaled with the enzyme activity measured by established analytical techniques. Hence, it was concluded that the heat flow provided a valid measure of the hydrolytic rate also in a complex biomass. The hydrolysis process was consistently found to be exothermic, but......A limited selection of assay and screening methodologies for cellulolytic enzymes has been stated as a restriction in biomass research. In this report we test the potential of isothermal calorimetry for this purpose. The primary observable in this technique (the heat flow in Watts), scales with the...... rate of hydrolysis, and unlike other approaches, it provides a continuous picture of the hydrolytic rate. It was found that the activity of a standard enzyme cocktail against purified cellulose substrates and dilute acid pretreated corn stover (PCS) was readily detected in calorimeters of different...

  20. Preparation, structural, and calorimetric characterization of bicomponent metallic photonic crystals

    Science.gov (United States)

    Kozlov, M. E.; Murthy, N. S.; Udod, I.; Khayrullin, I. I.; Baughman, R. H.; Zakhidov, A. A.

    2007-03-01

    We report preparation and characterization of novel bicomponent metal-based photonic crystals having submicron three-dimensional (3D) periodicity. Fabricated photonic crystals include SiO2 sphere lattices infiltrated interstitially with metals, carbon inverse lattices filled with metal or metal alloy spheres, Sb inverse lattices, and Sb inverse lattices filled with Bi spheres. Starting from a face centered SiO2 lattice template, these materials were obtained by sequences of either templating and template extraction or templating, template extraction, and retemplating. Surprising high fidelity was obtained for all templating and template extraction steps. Scanning electron microscopy (SEM), small angle X-ray scattering (SAXS) and differential scanning calorimetry (DSC) were used to characterize the structure and the effects of the structure on calorimetric properties. To the best of our knowledge, SAXS data on metallic photonic crystals were collected for first time.

  1. Calorimetric study of tellurium rich Se-Te-Sn glasses

    Science.gov (United States)

    Heera, Pawan; Kumar, Anup; Jharwal, Manish; Sharma, Raman

    2016-05-01

    We report the calorimetric study of amorphous Se30Te70-x Snx alloys for x= 0, 1.5, 2.5, 4.5 in terms of kinetic parameters. The DSC curves recorded at four different heating rates are analyzed to determine the transition temperatures, activation energy, thermal stability, glass forming ability. The crystallization process has been investigated using Kissinger, Matusita, Augis and Bennett, and Gao and Wang models. Various kinetic parameters have been calculated for a better understanding of the growth mechanism. The glass transition temperatures Tg, onset crystallization Tc, peak crystallization Tp, and melting temperature Tm are found to increase with the increase in Sn content. The system under investigation is found to be thermally stable for at lower at% of Sn. The values of parameters HR, Hw, and S indicate that Glass forming ability (GFA) decays with an increase in Sn content.

  2. Comparison of calorimetric plasma diagnostics in a plasma downstream reactor

    Energy Technology Data Exchange (ETDEWEB)

    Roth, C; Zuber, V; Sonnenfeld, A; Rudolf von Rohr, P [ETH Zurich, Institute of Process Engineering, Sonneggstrasse 3, 8092 Zurich (Switzerland); Bornholdt, S; Kersten, H, E-mail: roth@ipe.mavt.ethz.ch [Christian-Albrechts-Universitaet zu Kiel, Institute of Experimental and Applied Physics, Leibnizstr.19, 24098 Kiel (Germany)

    2011-03-09

    The energy influx in a non-equilibrium plasma in the afterglow of a plasma downstream reactor has been measured by two different calorimetric probe types. The radio frequency discharge is investigated for oxygen (10-100%)-argon (90-0%) mixtures at relatively high gas flow rates (750-3000 sccm) and pressures (100-350 Pa). The main process parameters influencing the energy influx are the plasma power, the system pressure and the total gas flow rate. Even though the size, geometry and material composition of the used probe types are different, comparable energy flux values are achieved. Depending on the process parameters, energy fluxes between around 100 and 3500 W m{sup -2} are found and the variation of the pressure and total gas flow rate suggests a highly flow-dependent plasma density distribution in the reactor.

  3. Remote calorimetric detection of urea via flow injection analysis.

    Science.gov (United States)

    Gaddes, David E; Demirel, Melik C; Reeves, W Brian; Tadigadapa, Srinivas

    2015-12-01

    The design and development of a calorimetric biosensing system enabling relatively high throughput sample analysis are reported. The calorimetric biosensor system consists of a thin (∼20 μm) micromachined Y-cut quartz crystal resonator (QCR) as a temperature sensor placed in close proximity to a fluidic chamber packed with an immobilized enzyme. Layer by layer enzyme immobilization of urease is demonstrated and its activity as a function of the number of layers, pH, and time has been evaluated. This configuration enables a sensing system where a transducer element is physically separated from the analyte solution of interest and is thereby free from fouling effects typically associated with biochemical reactions occuring on the sensor surface. The performance of this biosensing system is demonstrated by detection of 1-200 mM urea in phosphate buffer via a flow injection analysis (FIA) technique. Miniaturized fluidic systems were used to provide continuous flow through a reaction column. Under this configuration the biosensor has an ultimate resolution of less than 1 mM urea and showed a linear response between 0-50 mM. This work demonstrates a sensing modality in which the sensor itself is not fouled or contaminated by the solution of interest and the enzyme immobilized Kapton® fluidic reaction column can be used as a disposable cartridge. Such a system enables reuse and reliability for long term sampling measurements. Based on this concept a biosensing system is envisioned which can perform rapid measurements to detect biomarkers such as glucose, creatinine, cholesterol, urea and lactate in urine and blood continuously over extended periods of time. PMID:26479269

  4. Ion Beam Energy Calibration Method for Accelerator

    International Nuclear Information System (INIS)

    Ion beam energy calibration methods, i e : nuclear reaction method, magnetic field method and calorimeter method were elaborated and studied from its advantage and disadvantage in this paper. Ion beam energy calibration method for accelerator using the method of magnetic field on 3 MV Tandem Accelerator have been carried out at Tiara, JAERI, Japan. The result showed that the energy of ion beam current is 43.56 keV. The result of study conclude that nuclear reaction method generally used to calibrate ion beam energy at the accelerator of energy larger than 2 MeV, calorimetric method for the accelerator electron including linac, magnetic field method for all particle type of accelerator. (author)

  5. A Statistical Examination on the Compensation between the Enthalpies and Entropies Obtained from the Calorimetric Methods

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    The validity of the compensation between the enthalpies and entropies obtained from the calorimetric methods was statistically examined for the first time based on computer simulations. It turned out that the several claimed enthalpy-entropy compensations in literature based upon the calorimetric measurements were statistically correct. Interestingly, a linear relationship between the slopes and correlation coefficients of the TDS-DH plots of different supramolecular systems was found, which indicated that the solvent reorganization was the physical origin of the compensation behavior.

  6. Calorimetric study of interaction of barium hydroxide with diluted solutions of hydrofluoric acid

    International Nuclear Information System (INIS)

    Present article is devoted to calorimetric study of interaction of barium hydroxide with diluted solutions of hydrofluoric acid. The calorimetric study of interaction of barium hydroxide with diluted solutions of hydrofluoric acid was carried out in order to determine the thermal effects of reactions. The results of interaction of Ba(OH)4·8H2O with 5, 10, and 20% solution of hydrofluoric acid were considered.

  7. Calorimetric measurements of $^{163}$ holmium decay as tools to determine the electron neutrino mass

    CERN Document Server

    De Rújula, Alvaro

    1982-01-01

    Computes the spectrum of 'calorimetric' energy in the electron capture decay of /sup 163/Ho. A calorimetric experiment would yield an excellent determination of (/sup 163/Ho, /sup 163/Dy) mass difference. The proximity of the spectral endpoint to an atomic resonance makes the fraction of events that are sensitive to a non-zero neutrino mass superior in /sup 163/Ho decay than in tritium decay.

  8. Calorimetric and relaxation properties of xylitol-water mixtures

    Science.gov (United States)

    Elamin, Khalid; Sjöström, Johan; Jansson, Helén; Swenson, Jan

    2012-03-01

    We present the first broadband dielectric spectroscopy (BDS) and differential scanning calorimetry study of supercooled xylitol-water mixtures in the whole concentration range and in wide frequency (10-2-106 Hz) and temperature (120-365 K) ranges. The calorimetric glass transition, Tg, decreases from 247 K for pure xylitol to about 181 K at a water concentration of approximately 37 wt. %. At water concentrations in the range 29-35 wt. % a plentiful calorimetric behaviour is observed. In addition to the glass transition, almost simultaneous crystallization and melting events occurring around 230-240 K. At higher water concentrations ice is formed during cooling and the glass transition temperature increases to a steady value of about 200 K for all higher water concentrations. This Tg corresponds to an unfrozen xylitol-water solution containing 20 wt. % water. In addition to the true glass transition we also observed a glass transition-like feature at 220 K for all the ice containing samples. However, this feature is more likely due to ice dissolution [A. Inaba and O. Andersson, Thermochim. Acta, 461, 44 (2007)]. In the case of the BDS measurements the presence of water clearly has an effect on both the cooperative α-relaxation and the secondary β-relaxation. The α-relaxation shows a non-Arrhenius temperature dependence and becomes faster with increasing concentration of water. The fragility of the solutions, determined by the temperature dependence of the α-relaxation close to the dynamic glass transition, decreases with increasing water content up to about 26 wt. % water, where ice starts to form. This decrease in fragility with increasing water content is most likely caused by the increasing density of hydrogen bonds, forming a network-like structure in the deeply supercooled regime. The intensity of the secondary β-relaxation of xylitol decreases noticeably already at a water content of 2 wt. %, and at a water content above 5 wt. % it has been replaced by a

  9. Estimation of the diversity between DNA calorimetric profiles, differential melting curves and corresponding melting temperatures.

    Science.gov (United States)

    Chang, Chun-Ling; Fridman, Alexander S; Grigoryan, Inessa E; Galyuk, Elena N; Murashko, Oleg N; Hu, Chin-Kun; Lando, Dmitri Y

    2016-11-01

    The Poland-Fixman-Freire formalism was adapted for modeling of calorimetric DNA melting profiles, and applied to plasmid pBR 322 and long random sequences. We studied the influence of the difference (HGC -HAT ) between the helix-coil transition enthalpies of AT and GC base pairs on the calorimetric melting profile and on normalized calorimetric melting profile. A strong alteration of DNA calorimetrical profile with HGC -HAT was demonstrated. In contrast, there is a relatively slight change in the normalized profiles and in corresponding ordinary (optical) normalized differential melting curves (DMCs). For fixed HGC -HAT , the average relative deviation (S) between DMC and normalized calorimetric profile, and the difference between their melting temperatures (Tcal -Tm ) are weakly dependent on peculiarities of the multipeak fine structure of DMCs. At the same time, both the deviation S and difference (Tcal -Tm ) enlarge with the temperature melting range of the helix-coil transition. It is shown that the local deviation between DMC and normalized calorimetric profile increases in regions of narrow peaks distant from the melting temperature. PMID:27422497

  10. Analysis of TRIGA reactor thermal power calibration method

    International Nuclear Information System (INIS)

    Analysis of thermal power method of the nuclear instrumentation of the TRIGA reactor in Ljubljana is described. Thermal power calibration was performed at different power levels and at different conditions. Different heat loss processes from the reactor pool to the surrounding are considered. It is shown that the use of proper calorimetric calibration procedure and the use of heat loss corrections improve the accuracy of the measurement. To correct the position of the control rods, perturbation factors are introduced. It is shown that the use of the perturbation factors enables power readings from nuclear instrumentation with accuracy better than without corrections.(author)

  11. Magnetic and calorimetric studies of antiferromagnetic transitions in erbium sesquisulfide

    Energy Technology Data Exchange (ETDEWEB)

    Wang, C.R.; Chen, Y.Y.; Yao, Y.D.; Lin, Y.S.; Ou, M.N.; Taher, S.M.A.; Hamdeh, H.H.; Zhang, X.; Ho, J.C. E-mail: james.ho@wichita.edu; Gruber, J.B.John B

    2004-03-01

    Magnetic measurements reveal an antiferromagnetic transition in erbium sesquisulfide ErS{sub 1.5} (Er{sub 2}S{sub 3}). The Neel temperature T{sub N} decreases from approximately 3 K at low fields to below 1.8 K at 9000 G. A Curie-Weiss fit to the low-field data between 100 and 300 K yields an effective magnetic moment of 9.65 {mu}{sub B} per Er{sup 3+}. Zero-field calorimetric measurements between 0.7 and 8 K also show a corresponding specific heat peak at T{sub N}. Not expected, however, is the presence of a lower-temperature specific heat shoulder near 2 K. An entropy analysis indicates that both anomalies provide a total of R ln 2 as expected for the Er{sup 3+} ordering, suggesting that the two non-equivalent Er{sup 3+} sites in the monoclinic lattice have different transition temperatures near 3 and 2 K, respectively.

  12. Atlas barrel electromagnetic calorimeter performance study. Measurement of the Forward-Backward asymmetry in the qq-bar {yields} Z/{gamma}{sup *} {yields} e{sup +}e{sup -} events; Etude des performances du calorimetre electromagnetique tonneau d'ATLAS. Mesure de l'asymetrie Avant-Arriere dans les evenements qq-bar {yields} Z/{gamma}{sup *} {yields} e{sup +}e{sup -}

    Energy Technology Data Exchange (ETDEWEB)

    Aharrouche, M

    2006-12-15

    The start up of the ATLAS experiment at the CERN LHC is planned for the year 2007. The physics program of the experiment covers a wide field, going from tests of Standard Model (Higgs boson discovery) to new theories beyond the Standard Model (Supersymmetry, extra dimensions... etc). The work presented in this thesis has been made within the framework of the preparation of this experiment. After having presented the 2004 combined run, its installation, pedestal data and calibration data analysis, we develop a method for calibrating the energy measurement based on Geant4 Monte-Carlo simulation of the combined run. These simulations are done in the general framework developed for the analysis of the ATLAS data. We present then the performance studies of the electromagnetic calorimeter as well as the results obtained: a sampling term of the energy resolution of 10.6% GeV and local constant term of 0.43%, a non-uniformity of response of 0.44% giving a total constant term of 0.6% and a linearity better than 0.2% for electrons energies between 20 and 250 GeV. Concerning the 'physics' side of this thesis, we show a first study on the determination of the effective weak mixing angle, sin{sup 2}({theta}(lept,eff) with one precision better than the current results, 10{sup -4}. To reach such a precision it has been necessary to identify the electrons in the forward regions of the detector. This point is the subject of the last part of this manuscript, it shows that one can reach an electron-jet rejection of 100 with an efficiency of the electrons reconstruction of 50%, by using a discriminating analysis based on the methods of Fisher, the likelihood and the neural networks. (author)

  13. A DU bed system for storing and supplying hydrogen isotopes

    Energy Technology Data Exchange (ETDEWEB)

    Koo, Daeseo; Park, Jongchul; Ahn, Do-Hee; Chung, Hongsuk [KAERI, Daejeon (Korea, Republic of); Yun, Sei-Hun [National Fusion Research Institute, Daejeon (Korea, Republic of)

    2015-05-15

    Depleted uranium (DU) has been extensively proposed for the storage, supply, and recovery of hydrogen isotopes. SDS is used for storing hydrogen isotopes as a metal hydride form. To control the SDS, it is necessary to monitor the tritium amount in a bed. In this study, a full-sized DU bed was designed and fabricated including cylindrical-type copper foam of nine layers to study the characteristics of hydriding/dehydriding and simulate the tritium amount in a bed. The integrity and leak inspection on the welding of a primary vessel was performed using a penetration test, helium leak test, and pressure test. Auto tuning on the cable heaters of two pairs in the DU bed was also be performed. In our next study, the hydriding/dehydriding on a DU bed will be performed. A simulation on the depleted uranium hydriding will be carried out. A DU bed was designed and fabricated including cylindrical-type copper foam of nine layers to study the characteristics of hydriding/dehydriding and simulate the tritium amount in a bed. Through a penetration test, it was confirmed that the welding of the primary vessel has a good integrity. It was confirmed that the two helium tubes is sound by inspecting a helium leak test on the welding of the primary vessel. It was also confirmed that the primary vessel has a good integrity by inspecting a helium leak and conducting a pressure test on it. Vacuuming of the DU bed system was carried out. Vacuuming of the in-bed calorimetric equipment was also carried out.

  14. Calibration uncertainty

    DEFF Research Database (Denmark)

    Heydorn, Kaj; Anglov, Thomas

    2002-01-01

    Methods recommended by the International Standardization Organisation and Eurachem are not satisfactory for the correct estimation of calibration uncertainty. A novel approach is introduced and tested on actual calibration data for the determination of Pb by ICP-AES. The improved calibration...... uncertainty was verified from independent measurements of the same sample by demonstrating statistical control of analytical results and the absence of bias. The proposed method takes into account uncertainties of the measurement, as well as of the amount of calibrant. It is applicable to all types of...

  15. Calorimetric approach of lanthanides (3) complexation and extraction by malonamides

    International Nuclear Information System (INIS)

    In the field of long lived radionuclides separation, diamides are interesting extractants because of their ability to co-extract trivalent lanthanides and actinides, which is a preliminary and essential step in high level radioactive waste reprocessing. The research carried out contributes to a better understanding of the mechanisms and the aim is the determination of thermodynamics properties (ΔrG, ΔrH et ΔrS) related to the complexation and the extraction of lanthanides(III) by malonamides. The first part of the document deals with the complexation of lanthanides(III) by an hydrosoluble diamide. The experimental results obtained by UV-visible spectrometry, TRLIF, NMR and microcalorimetric titration proved that lanthanides(III)-TEMA interactions in aqueous medium are very weak and that the complexation reaction is endothermic. The TEMA ligand still stays in the second coordination sphere of coordination of the lanthanide ion. The second part of this study focuses on the extraction of neodymium(III) nitrate by a lipophilic diamide which is an exothermic reaction. The influence of the composition of aqueous and organic phases on the thermodynamics properties ΔrG et ΔrH has been studied by microcalorimetric titration. The most influent parameter is the total concentration in extractant. As a consequence, thermodynamic values are very dependent on the organic phase organisation before and alter extraction. At the same time, this study showed the interest of the calorimetric approach for the analysis of basic reactions like diamide dilution and their organisation as oligomeric aggregates. (author)

  16. Some problems in adsorption and calorimetric studies of the steps of catalytic processes

    Institute of Scientific and Technical Information of China (English)

    Victor E. Ostrovskii

    2004-01-01

    Principal side factors as well as technical and procedural peculiarities capable of distorting the results of measurements of adsorbed and desorbed amounts, of falsifying the nature of the processes proceeding in the systems under study, and of promoting artifacts in calorimetric and other studies of gas chemisorption on powders are considered. Modified techniques and procedures allowing the elimination of sources of side phenomena and artifacts and freeing traditional glass static adsorption apparatuses and experimental procedures from undesirable factors and peculiarities are proposed.Some available chemisorption and calorimetric data representing artifacts and also some data that are not artifacts but,due to imperfections of chemisorption techniques, show up as artifacts are presented and discussed. Several applications of the improved techniques and procedures to calorimetric and adsorption studies of the steps of catalytic processes proceeding on the basis of natural gas and of products of its processing are presented and discussed.

  17. Calorimetric techniques applied to the thermodynamic study of interactions between proteins and polysaccharides

    Directory of Open Access Journals (Sweden)

    Monique Barreto Santos

    2016-08-01

    Full Text Available ABSTRACT: The interactions between biological macromolecules have been important for biotechnology, but further understanding is needed to maximize the utility of these interactions. Calorimetric techniques provide information regarding these interactions through the thermal energy that is produced or consumed during interactions. Notable techniques include differential scanning calorimetry, which generates a thermodynamic profile from temperature scanning, and isothermal titration calorimetry that provide the thermodynamic parameters directly related to the interaction. This review described how calorimetric techniques can be used to study interactions between proteins and polysaccharides, and provided valuable insight into the thermodynamics of their interaction.

  18. Micro-calorimetric sensor for vapour phase explosive detection with optimized heat profile

    DEFF Research Database (Denmark)

    Greve, Anders; Olsen, Jesper Kenneth; Boisen, Anja;

    2009-01-01

    A heater design, used in a micro-calorimetric sensor, has been optimized for temperature uniformity and the sensor has been used for detection of trace amounts of explosives. In this abstract the design, characterization and functionality is described. The performance of the novel heater design is...... characterized by measuring the temperature coefficient of resistivity (TCR) values and by mapping the temperature distribution using Raman spectroscopy. The new heater design has increased the temperature uniformity and calorimetric measurements on DNT (2,4-Dinitrotoluene) show more reproducible and better...

  19. Tagging calibration of the jets from beauty quarks and the search for Higgs boson in the tt-bar H {yields} l{nu}b, jjb, bb-bar channel in the ATLAS experiment at LHC; Calibration de l'etiquetage de jets issus de quarks beaux et recherche du boson de Higgs dans le canal tt-barH {yields} l{nu}b, jjb, bb-bar dans l'experience ATLAS aupres du LHC

    Energy Technology Data Exchange (ETDEWEB)

    Correard, Sebastien [Faculte des Sciences de Luminy, Universite de la Mediterranee, Aix-Marseille II, 163 avenue de Luminy, 13288 Marseille cedex 09 (France)

    2006-02-15

    B-tagging calibration and search for the Higgs boson in the tt-bar H {yields} l{nu}b, jjb, bb-bar channel with ATLAS at LHC The ATLAS experiment, based at CERN, will use the LHC proton collisions to deepen the Standard Model measurements, and look for possible signs of new physics. One of its main tasks will be the search for the Higgs boson. This thesis first describes the latest b-tagging algorithms, shows the importance of its calibration, and proposes a b-tagging calibration method based on the first data recorded by ATLAS. Then, considering that the Higgs boson may be light (m{sub H} < 135 GeV/c{sup 2}), the ttH channel is studied, with H decaying in a b quark pair. Full simulation and the latest realistic b-tagging methods have been combined for the first time. For an integrated luminosity of 30 fb{sup -1} (3 years of data taking), the S/{radical}B ratio, determining the sensitivity of this analysis, is raised to 4.9. This should allow a non-ambiguous observation of the Higgs boson in this channel. (author)

  20. Calibration of the VIRGO experiment: from the testing of the detector to the search of coalescing binaries with the central interferometer; Calibration de l'experience VIRGO: de l'etalonnage du detecteur a la recherche de signaux de coalescences binaires avec l'interferometre central

    Energy Technology Data Exchange (ETDEWEB)

    Veziant, O

    2003-05-01

    The aim of the VIRGO experiment is the detection of gravitational waves. The detector is based on a Michelson interferometer with three-kilometer long arms. Before the availability of the complete detector, most of the technical choices have been tested on a small scale interferometer (central interferometer or CITF). This allowed to record the first technical data of the experiment. The calibration of the CITF data has been studied in this thesis. This work involved some local operations such as the calibration of the electronics of the detection system, and also some more global operation such as the characterisation of the detector response function. The latter is used to unfold the data from experimental effects and to estimate the detector sensitivity. A monitoring procedure of this response function has been applied to produce a time series of reconstructed data, i.e. data free from experimental distortions. The implementation of VIRGO will make use of an optical calibrator using the radiation pressure of a laser beam to act on the interferometer mirrors and characterize its response. The optical calibrator has been designed and assembled in laboratory and its performances have been measured. The physics analysis following the calibration step was tackled through a coalescing binary search algorithm. The latter was applied both on simulated data and on CITF data in order to estimate the detector noise level and to check the effects of the reconstruction procedure. (author)

  1. Calibration de l'echelle d'energie des jets et mesure de la masse du quark top dans le canal semi-leptonique dans l'experience ATLAS

    CERN Document Server

    Balli, Fabrice

    The main goal of this thesis is to provide a measurement as accurate as possible of the top quark mass in the semi-leptonic decay channel. This experimental measurement is made thanks to the ATLAS detector near LHC, a proton-proton collider. The main interests for this precison measurement are the physics constraints to the theoretical models of fundamental constituents. Besides, the top quark mass is a parameter allowing to have more information on the vacuum stability at the Planck scale within the Standard Model. Jet energy calibration is crucial to this measurement. The impact of real data taking conditions on this calibration and on jet performance is detailed. The top quark mass measurement using 2011 data collected at an energy in the center-of-mass of 7 TeV is presented. It is using a tridimensional template analysis method. The measured top quark mass is: mtop = 172.01 ± 0.92 (stat) ± 1.17 (syst) GeV. The 2012 data collected at an energy in the center-of-mass of 8 TeV are also analysed, and a preli...

  2. Power calibration study at the Musashi reactor

    International Nuclear Information System (INIS)

    The Musashi reactor (TRIGA-II,100 kW) initially went critical in January of 1963. The reactor had been used for training, isotope production and medical irradiation for boron neutron capture therapy (1). The initial power calibration was based on the use of a calibrated electrical heater in a calorimetric procedure where the rate of rise of the bulk pit water temperature was measured using 2 kW heaters x 6 pieces. The rate of rise of water temperature was determined to be 0.0474 C/kWh. The reactor was then operated to give the same rate of rise of water temperature. Thus the reactor power was established at the value produced by the electrical heaters. A stirrer for tank water mixing was not used. Recent communications (2)(3) indicated that power calibrations using a stirrer provided a much more uniform mixing, and heating in the reactor tank water which was essential for an accurate calibration. In this paper, the effect of mixing using a stirrer was investigated considering the physical factors such as room temperature, humidity, tank water temperature and it's distributions. The room temperature and humidity around the reactor varies 6-30 and 30-80 %, respectively, depending on four seasons. The heat flow through the surface of the pool was also evaluated because the reactor usually operates without cover on the surface of the pool. (orig.)

  3. Integrated calorimetric microreactor in low-temperature cofired ceramic (LTCC) technology

    OpenAIRE

    Maeder, Thomas; Willigens, Raphaël; Fournier, Yannick; Ryser, Peter

    2006-01-01

    Object of this work 1) Explore the feasibility of an LTCC microreactor • Chemical stability: compatible with HCl, NaOH, ... • Thermal stability to >100°C 2) Achieve a high degree of integration • Temperature measurement • Reactant flow measurement • Temperature control • Calorimetric chamber

  4. A calorimetric study of solute effects on the kinetic stability of alpha-amylase

    DEFF Research Database (Denmark)

    Olsen, Søren Nymand; Andersen, Kim Bruno; Øgendal, Lars Holm;

    2009-01-01

    In this study we evaluated the applications of isothermal titration calorimetry (ITC) to Study solute effects on the kinetics of irreversible protein denaturation. More specifically, denaturation of Bacillus Halmapalus alpha-amylase (BHA) was initiated by addition of EDTA to the calorimetric cell...

  5. Some radiation-induced effects in typical calorimetric materials and sensors

    International Nuclear Information System (INIS)

    The radiation-induced effects of the electron beams (EB) generated by accelerators in typical calorimetric materials and sensors have been surveyed and investigated. These effects influence the useful lifetime of the materials and sensors at high doses of about 4,000 to 5,000 kGy. (author)

  6. Les mots du secret

    OpenAIRE

    Delage, Agnès

    2016-01-01

    Cet article analyse les reconfigurations sémantiques du lexique et des mots du secret en usage dans l’Europe du Sud entre le Moyen Âge et l’époque moderne. En partant des approches récentes du secret et de la dissimulation dans un contexte contemporain de revendication d’un « droit au secret », nous analysons comment l’historiographie actuelle des XVIe et XVIIe siècles aborde une histoire longue des régimes de positivité du secret en Europe. En partant de l’époque pré-moderne, nous étudions l...

  7. Du taureau au dindon

    OpenAIRE

    Saumade, Frédéric

    2005-01-01

    L’importation du cheval et du taureau en Méso-Amérique et la diffusion corrélative de la corrida comme représentation ostentatoire du pouvoir espagnol ont eu pour conséquence la transformation de la structure originelle du jeu taurino-équestre. Le vecteur de ce système est un paradoxe technologique : la monte du taureau, soit une inversion de l’équitation dont l’initiative historique revient aux péons indigènes exclus de la pratique équestre à l’époque coloniale. À partir d’une approche ethno...

  8. Restaurant du Rivage, Vevey

    OpenAIRE

    Basini, Sari Bianca; Glocki, Ryszard Nikodem

    2015-01-01

    Après cinquante ans de mutilations, d'abandon et de spéculations économiques, le complexe du château de l'Aile et de la salle du Castillo à Vevey doit redéfinir son rôle public par rapport à la place du Marché et au Jardin du Rivage. S'appuyant sur la mémoire historique en ajoutant une unité à l'ensemble, nous créons un îlot regroupant des fonctions publiques. Il dessert ainsi l'espace ouvert environnant en articulant la relation entre le jardin et la place. L'élargissement de la promenade du...

  9. Calibration of high-heat-flux sensors in a solar furnace

    International Nuclear Information System (INIS)

    The most common sensors used for the measurement of high solar irradiance are the Gardon gauges, which are usually calibrated using a black body at a certain temperature as the radiant source. This calibration procedure is assumed to produce a systematic error when solar irradiance measurements are taken using these sensors. This paper demonstrates a calorimetric method for calibrating these high-heat-flux gauges in a solar furnace. This procedure has enabled these sensors to be calibrated under concentrated solar radiation at higher irradiances under non-laboratory conditions in the CIEMAT solar furnace at the Plataforma Solar de Almeria. Working at higher irradiances has allowed the uncertainty in the calibration constant of these sensors to be reduced. This work experimentally confirms the predicted systematic errors committed when measuring high solar irradiances using Gardon sensors calibrated with a black body. (authors)

  10. Energy calibration of the electromagnetic forward calorimeters in ATLAS

    International Nuclear Information System (INIS)

    The electromagnetic forward calorimeters of the ATLAS detector are responsible for the measurement of the energy of electrons in the region from 2.5 < η < 4.9. In this so called forward region tracking coverage is not available implying that electrons need to be reconstructed and identified by calorimetric information only. A calibration of the electromagnetic forward calorimeters is of importance for many electroweak measurements and searches for new physics. The energy calibration is based on an integrated luminosity of 20.3 fb-1 of proton-proton collision data at √(s) = 8 TeV recorded with the ATLAS detector in 2012. A selection of Z → ee events with one electron in the forward region and one electron in the more central region is performed to compare the shape of the Z resonance in data and simulations. This talk discusses the detailed approach to accomplish the calibration of the electromagnetic forward calorimeters in ATLAS.

  11. Camera calibration

    OpenAIRE

    Andrade-Cetto, J.

    2001-01-01

    This report is a tutorial on pattern based camera calibration for computer vision. The methods presented here allow for the computation of the intrinsic and extrinsic parameters of a camera. These methods are widely available in the literature, and they are only summarized here as an easy and comprehensive reference for researchers at the Institute and their collaborators.

  12. Les traces du travail du bois

    Czech Academy of Sciences Publication Activity Database

    Bláha, Jiří; Růžička, P.; Janák, K.

    1. Namur : Institut du Patrimoine Wallon, 2008 - (Hoffsummer, P.; Eeckhout, J.), s. 119-140 ISBN 978-2-930466-49-1. - (Les dossiers de l’IPW. 6) Institutional research plan: CEZ:AV0Z20710524 Keywords : carpentry * tools * built heritage Subject RIV: AL - Art, Architecture, Cultural Heritage

  13. Ecologie du phytoplancton du lac Kivu

    Directory of Open Access Journals (Sweden)

    Sarmento, H.

    2008-01-01

    Full Text Available Speciation within the African Coffee Pathogen. Cet article analyse s'il est avantageux d'utiliser le compost au lieu de l'engrais minéral pour produire la laitue dans la zone urbaine et péri-urbaine de Yaoundé. Les résultats de terrain montrent l'obtention de rendements et profits plus élevés lorsqu'on utilise le compost. Les résultats de la fonction de production Cobb-Douglas prouvent que l'utilisation du compost est statistiquement significative pour expliquer la variation de rendement de la laitue et que le compost est l'intrant le plus productif. D'autres résultats montrent que le compost fournit la matière organique utile au sol et que les besoins d'irrigation en eau de la culture sont réduits grâce à l'utilisation du compost. Par conséquent, malgré le fait que l'application du compost demande une main-d'oeuvre beaucoup plus élevée, son utilisation est généralement bénéfique pour les agriculteurs vivant aux alentours de Yaoundé. Les programmes de vulgarisation de cet intrant pour encourager son adoption devraient donc figurer parmi les points prioritaires dans la politique agricole du gouvernement camerounais.

  14. Signification politique du climat

    OpenAIRE

    Lamizet, Bernard

    2013-01-01

    Le climat fonde une approche politique particulière de l’espace et du temps, en suscitant des représentations particulières se situant dans l’histoire, la mémoire, la prévision et le domaine du développement durable. Le climat représente aussi une forme particulière de limitation des pouvoirs et de représentation de la contrainte dans le discours politique et dans les médias, jusqu’à figurer une forme de violence. Enfin, les significations du climat se situent dans l’inconscient. The notio...

  15. The du Bois sign.

    Science.gov (United States)

    Voelpel, James H; Muehlberger, Thomas

    2011-03-01

    According to the current literature, the term "du Bois sign" characterizes the condition of a shortened fifth finger as a symptom of congenital syphilis, Down syndrome, dyscrania, and encephalic malformation. Modern medical dictionaries and text books attribute the eponym to the French gynecologist Paul Dubois (1795-1871). Yet, a literature analysis revealed incorrect references to the person and unclear definitions of the term. Our findings showed that the origin of the term is based on observations made by the Swiss dermatologist Charles du Bois (1874-1947) in connection with congenital syphilis. In addition, a further eponymical fifth finger sign is closely associated with the du Bois sign. In conclusion, the du Bois sign has only limited diagnostic value and is frequently occurring in the normal healthy population. PMID:21263293

  16. Les outils du CERN

    CERN Document Server

    1999-01-01

    C'est le plus grand centre mondial de recherche en physique des particules. Les outils du Laboratoire, accélérateurs et détecteurs de particules, figurent parmi les instruments scientifiques les plus complexes au monde. Des prix Nobels ont d'ailleurs été attribués aux physiciens du CERN pour leurs développements.

  17. Empirical Calibration for Dolomite Stoichiometry Calculation: Application on Triassic Muschelkalk- Lettenkohle Carbonates (French Jura Calibration empirique pour le calcul de la stoechiométrie de la dolomite : application aux carbonates triasiques du Muschelkalk-Lettenkohle (Jura français

    Directory of Open Access Journals (Sweden)

    Turpin M.

    2012-02-01

    équation de Lumsden et de méthodes antérieures. L’approche proposée est vérifiée grâce à l’analyse d’un échantillon référence de dolomite (Eugui et appliquée à des roches carbonatées du Trias (Muschelkalk supérieur-Lettenkohle du Jura français. Elle est combinée à une étude pétrographique et isotopique et peut être appliquée tant aux roches qu’aux ciments dolomitiques. Les dolomies du Muschelkalk supérieur se sont formées au cours d’une dolomitisation d’enfouissement associée à des fluides dont la température augmente et ayant une composition isotopique variable au cours de l’enfouissement. Outre la pétrographie, ceci est également mis en évidence par le pourcentage de Ca calculé dans les dolomites, qui atteint progressivement une stoechiométrie idéale (de 53,16 % à 51,19 % parallèlement au développement de la dolomitisation. Les dolomites du Lettenkohle montrent une stoechiométrie proche d’une stoechiométrie idéale (51,06 % Ca, sont ordonnées et associées à de l’anhydrite. Leur formation est liée à deux étapes de dolomitisation : de type sabkha et d’enfouissement. Cette étude permet ainsi une meilleure caractérisation des différents types de dolomites dans les roches sédimentaires et par conséquent une meilleure détermination de leur potentiel en tant que réservoir.

  18. Changes in the Calorimetric Value and Ignition Temperature of Composite Solid Propellants During Ageing-A Note

    Directory of Open Access Journals (Sweden)

    K. Kishore

    1986-10-01

    Full Text Available Calorimetric value and ignition temperature of carboxy terminated polybutadiene/ammonium perchlorate propellant decrease during accelerated ageing. The behaviour has been explained on account of binder loss and condensed phase reactions in the propellant matrix.

  19. Construction of the ATLAS end cap electromagnetic calorimeter and study of its performances; Construction du bouchon du calorimetre electromagnetique d'ATLAS et etudes de ses performances

    Energy Technology Data Exchange (ETDEWEB)

    Barrillon, P

    2002-09-01

    ATLAS is one of the four experiments which will take place at the LHC, the CERN future protons collider. This accelerator, which should start in 2007, will allow to continue the studies carried out by its predecessors, as the standard model Higgs boson and new physics searches. The very high luminosity -10 fb{sup -1} during the first three functioning years, then 100 fb{sup -1}- and the 14 TeV in the frame center will ease these studies. The Centre de Physique des Particules de Marseille took part in the ATLAS collaboration, taking in charge half of the End-cap electromagnetic calorimeter modules construction. The description of this sub-detector and the construction steps, in particular the electrical tests which allow the stacking validation, are presented in this document. These tests results, obtained for the live first production modules, are analysed. The pre-series module (module 0) performances, obtained with beam tests performed at CERN in 1999, are also presented. The detector uniformity studies have allowed to perform important improvements on the calorimeter components. A 0.6% global constant term has been determined in the End-cap internal region (wheel). (author)

  20. The calorimetric spectrum of the electron-capture decay of 163Ho. The spectral endpoint region

    Science.gov (United States)

    De Rújula, A.; Lusignoli, M.

    2016-05-01

    The electron-neutrino mass (or masses and mixing angles) may be directly measurable in weak electron-capture decays. The favoured experimental technique is "calorimetric". The optimal nuclide is 163Ho, and several experiments (ECHo, HOLMES and NuMECS) are currently studying its decay. The most relevant range of the calorimetric-energy spectrum extends for the last few hundred eV below its endpoint. It has not yet been well measured. We explore the theory, mainly in the cited range, of electron capture in 163Ho decay. A so far neglected process turns out to be most relevant: electron-capture accompanied by the shake-off of a second electron. Our two main conclusions are very encouraging: the counting rate close to the endpoint may be more than an order of magnitude larger than previously expected; the "pile-up" problem may be significantly reduced.

  1. Calibration Binaries

    Science.gov (United States)

    Drummond, J.

    2011-09-01

    Two Excel Spreadsheet files are offered to help calibrate telescope or camera image scale and orientation with binary stars for any time. One is a personally selected list of fixed position binaries and binaries with well-determined orbits, and the other contains all binaries with published orbits. Both are derived from the web site of the Washington Double Star Library. The spreadsheets give the position angle and separation of the binaries for any entered time by taking advantage of Excel's built in iteration function to solve Kepler's transcendental equation.

  2. ALTEA calibration

    Science.gov (United States)

    Zaconte, V.; Altea Team

    The ALTEA project is aimed at studying the possible functional damages to the Central Nervous System (CNS) due to particle radiation in space environment. The project is an international and multi-disciplinary collaboration. The ALTEA facility is an helmet-shaped device that will study concurrently the passage of cosmic radiation through the brain, the functional status of the visual system and the electrophysiological dynamics of the cortical activity. The basic instrumentation is composed by six active particle telescopes, one ElectroEncephaloGraph (EEG), a visual stimulator and a pushbutton. The telescopes are able to detect the passage of each particle measuring its energy, trajectory and released energy into the brain and identifying nuclear species. The EEG and the Visual Stimulator are able to measure the functional status of the visual system, the cortical electrophysiological activity, and to look for a correlation between incident particles, brain activity and Light Flash perceptions. These basic instruments can be used separately or in any combination, permitting several different experiments. ALTEA is scheduled to fly in the International Space Station (ISS) in November, 15th 2004. In this paper the calibration of the Flight Model of the silicon telescopes (Silicon Detector Units - SDUs) will be shown. These measures have been taken at the GSI heavy ion accelerator in Darmstadt. First calibration has been taken out in November 2003 on the SDU-FM1 using C nuclei at different energies: 100, 150, 400 and 600 Mev/n. We performed a complete beam scan of the SDU-FM1 to check functionality and homogeneity of all strips of silicon detector planes, for each beam energy we collected data to achieve good statistics and finally we put two different thickness of Aluminium and Plexiglas in front of the detector in order to study fragmentations. This test has been carried out with a Test Equipment to simulate the Digital Acquisition Unit (DAU). We are scheduled to

  3. The design of a calorimetric standard of ionising radiation absorbed dose

    International Nuclear Information System (INIS)

    The design of a calorimetric working standard of ionising radiation absorbed dose is discussed. A brief history of the appropriate quantities and units of measurement is given. Detailed design considerations follow a summary of the relevant literature. The methods to be used to relate results to national standards of measurement are indicated, including the need for various correction factors. A status report is given on the construction and testing program

  4. A field test and evaluation of the Simultaneous Calorimetric Assay System

    International Nuclear Information System (INIS)

    The Simultaneous Calorimetric Assay System measures the thermal power of a sample by calorimetry and the relative concentrations of the heat producing nuclei in the sample simultaneously. This transportable instrument provides a nondestructive determination of the plutonium content of the sample. This paper describes the instrument and its performance in a field test conducted by the Chemical Standards Laboratory at Rockwell International, Rocky Flats Plant, in the summer of 1983

  5. Determination of the protonation enthalpy of humic acid by calorimetric titration technique

    International Nuclear Information System (INIS)

    Graphical abstract: The thermodynamic quantities of protonation of humic acid were determined by the combination of potentiometric titration and calorimetric titration. It was observed that the protonation enthalpy and Gibbs free energy had been affected by pH of solution. As a result, the thermodynamics of the protonation reaction of humic acid is influenced by the polyelectrolyte effect and the heterogeneity. - Highlights: • We applied calorimetric titration technique to the protonation of humic acid. • The thermodynamic quantities of protonation of humic acid were determined. • The protonation enthalpy of humic acid is affected by the heterogeneity. • Gibbs free energy of the protonation is affected by the polyelectrolyte effect. - Abstract: In this study, the calorimetric titration technique was used to determine the protonation enthalpy of two reference humic acids and polyacrylic acid. First, we obtained the apparent protonation constant of two kinds of humic acid purchased from IHSS (International Humic Substances Society) and polyacrylic acid by potentiometric titration. Second, we obtained the protonation enthalpy of them by calorimetric titration. The protonation enthalpy of humic acid was affected by pH and the ionic strength of bulk solution. From the comparison of ΔH between humic acid and polyacrylic acid, it was concluded that the pH dependence of ΔH is attributed to the heterogeneity of humic acid. And ΔH of phenolic hydroxyl group in humic acid is strongly influenced by the electric double layer of humic acid’s surface. This is considered to be a reason of the ionic strength dependence of ΔH. On the other hand, Gibbs free energy of the protonation of humic acid is affected by the electrostatic attraction with the progress of dissociation of functional groups such as carboxyl group and phenolic hydroxyl group. Consequently, the thermodynamics of the protonation of humic acid is affected by the polyelectrolyte effect and the

  6. First Calorimetric Measurement of OI-line in the Electron Capture Spectrum of $^{163}$Ho

    CERN Document Server

    Ranitzsch, P C -O; Wegner, M.; Kempf, S.; Fleischmann, A.; Enss, C.; Gastaldo, L.; Herlert, A.; Johnston, K.

    2014-01-01

    The isotope $^{163}$Ho undergoes an electron capture process with a recommended value for the energy available to the decay, $Q_{\\rm EC}$, of about 2.5 keV. According to the present knowledge, this is the lowest $Q_{\\rm EC}$ value for electron capture processes. Because of that, $^{163}$Ho is the best candidate to perform experiments to investigate the value of the electron neutrino mass based on the analysis of the calorimetrically measured spectrum. We present for the first time the calorimetric measurement of the atomic de-excitation of the $^{163}$Dy daughter atom upon the capture of an electron from the 5s shell in $^{163}$Ho, OI-line. The measured peak energy is 48 eV. This measurement was performed using low temperature metallic magnetic calorimeters with the $^{163}$Ho ion implanted in the absorber. We demonstrate that the calorimetric spectrum of $^{163}$Ho can be measured with high precision and that the parameters describing the spectrum can be learned from the analysis of the data. Finally, we dis...

  7. Ultra-Responsive Thermal Sensors for the Detection of Explosives Using Calorimetric Spectroscopy (CalSpec)

    International Nuclear Information System (INIS)

    We have developed a novel chemical detection technique based on infrared micro-calorimetric spectroscopy that can be used to identify the presence of trace amounts of very low vapor pressure target compounds. Unlike numerous recently developed low-cost sensor approaches, the selectivity is derived from the unique differential temperature spectrum and does not require the questionable reliability of highly selective coatings to achieve the required specificity. This is accomplished by obtaining the infrared micro-calorimetric absorption spectrum of a small number of molecules absorbed on the surface of a thermal detector after illumination through a scanning monochromator. We have obtained infrared micro-calorimetric spectra for explosives such as TNT over the wavelength region 2.5 to 14.5 Mu-m. Thus both sophisticated and relatively crude explosive compounds and components are detectable with these ultra-sensitive thermal-mechanical micro-structures. In addition to the above mentioned spectroscopy technique and associated data, the development of these advanced thermal detectors is also presented in detail

  8. Calorimetric sensitivity and thermal resolution of a novel miniaturized ceramic DSC chip in LTCC technology

    Energy Technology Data Exchange (ETDEWEB)

    Missal, Wjatscheslaw, E-mail: wmissal@gmx.net [Department of Functional Materials, University of Bayreuth, 95440 Bayreuth (Germany); Kita, Jaroslaw [Department of Functional Materials, University of Bayreuth, 95440 Bayreuth (Germany); Wappler, Eberhard [wsk Mess- und Datentechnik GmbH, Gueterbahnhofstr. 1, 63450 Hanau (Germany); Bechtold, Franz [VIA electronic GmbH, Robert-Friese-Str. 3, 07629 Hermsdorf (Germany); Moos, Ralf [Department of Functional Materials, University of Bayreuth, 95440 Bayreuth (Germany)

    2012-09-10

    Highlights: Black-Right-Pointing-Pointer Unique vertical design of a DSC device manufactured in the low-cost LTCC technology and therefore capable of one-way use. Black-Right-Pointing-Pointer Fully functional DSC device with a size of only 1.5 mm Multiplication-Sign 11 mm Multiplication-Sign 39 mm enabling very low power consumption. Black-Right-Pointing-Pointer Comparable measurement performance as conventional DSC whilst also suitable for mobile thermal analysis. Black-Right-Pointing-Pointer Thermal resolution is 0.12 (TAWN test). Repeatability of the peak area is within 0.3% for indium samples. Black-Right-Pointing-Pointer Calorimetric sensitivity: linear with regard to temperature and independent from sample mass and heating rate in wide ranges. - Abstract: The calorimetric properties of a novel miniaturized ceramic differential scanning calorimeter device (MC-DSC) with integrated heater and crucible are presented. All features of a conventional DSC apparatus (including oven) are integrated into this DSC device of the size 11 mm Multiplication-Sign 39 mm Multiplication-Sign 1.5 mm. The MC-DSC device is suitable for one-way use, since it is fully manufactured in the low-cost planar low temperature co-fired ceramics technology. First characterization of this device is performed using indium, tin and zinc samples. The calorimetric sensitivity at 156.6 Degree-Sign C is 0.24 J/ Degree-Sign C s. It depends linearly on temperature in the range of at least 150 Degree-Sign C and 420 Degree-Sign C. The calorimetric sensitivity is constant up to an enthalpy of fusion of at least {Delta}H = 750 mJ (at 156.6 Degree-Sign C). The thermal analysis of indium in direct contact to the crucible of the chip even reveals a constant calorimetric sensitivity up to an enthalpy of fusion of at least {Delta}H = 1000 mJ. The repeatability of the peak area is within {+-}0.3% (11 mg indium, 10 measurements). The thermal resolution determined using 4,4 Prime -azoxyanisole under TAWN test

  9. Study of the sensibility of the Antares neutrino telescope to very high energy photons: Contribution to the time calibration of the detector; Etude de la sensibilite du telescope a neutrinos Antares aux photons de tres haute energie: Contribution a l'etalonnage en temps du detecteur

    Energy Technology Data Exchange (ETDEWEB)

    Guillard, G.

    2010-10-15

    From the sea-floor, the 900-odd photomultiplier tubes of the Antares neutrino telescope scrutinize the abysses attempting to discern, amid bioluminescence and marine radioactivity, Cerenkov photons emitted by muons from astrophysical neutrinos, and to distinguish these muons from those generated by air showers produced by cosmic rays. Antares has been collecting data since 2006; this feat of engineering has paved the way for submarine neutrino astronomy: Antares is expected to be the forerunner of a larger instrument, KM3NeT. Telescope's performance is characterized in part by its angular resolution. In the case of Antares, the angular resolution is directly related to the time resolution of the detector's elements. This manuscript presents a correction for one of the main sources of deterioration of this time resolution, the walk effect induced by the set up of a fixed threshold for triggering the photomultiplier tubes signal. This correction, implemented in the official software chain of the Antares collaboration, improves in particular the events reconstruction quality estimator. This implementation allows further optimizations. The author also attempts to evaluate, using a complete Monte-Carlo simulation, the possibility of using very high energy photon sources as calibrated muon beams in order to estimate the absolute pointing and the angular resolution of the telescope. Although limited by large uncertainties, it is demonstrated that the possibility to detect such sources is extremely small. In addition, it is shown that the atmospheric neutrino background induced by very high-energy photons is negligible. (author)

  10. Trinocular Calibration Method Based on Binocular Calibration

    OpenAIRE

    CAO Dan-Dan; Luo, Chun; GAO Shu-Yuan; Wang, Yun; Li, Wen-Bin; XU Zhen-Ying

    2012-01-01

    In order to solve the self-occlusion problem in plane-based multi-camera calibration system and expand the measurement range, a tri-camera vision system based on binocular calibration is proposed. The three cameras are grouped into two pairs, while the public camera is taken as the reference to build the global coordinate. By calibration of the measured absolute distance and the true absolute distance, global calibration is realized. The MRE (mean relative error) of the global calibration of ...

  11. Droit du travail

    OpenAIRE

    De Quenaudon, René

    2016-01-01

    L’association des deux notions, celle de droit du travail et celle de RSE (responsabilité sociale des entreprises), relève du défi, tout au moins dans le contexte juridique français. C’est un peu comme si l’on prétendait pouvoir mélanger l’eau et le feu. Pourquoi ? Parce que classiquement le droit du travail est présenté comme un ensemble de règles assorties de la contrainte étatique dans les relations entre employeurs et salariés alors que la RSE est présentée comme un ensemble d’engagements...

  12. Top pairs production and effects of new physics. Jet calibration with W into jet-jet process. Top mass measurement; Production de paires de Top et effet de Nouvelle Physique. Calibration des jets avec le processus Wen en jet-jet. Mesure de la masse du Top

    Energy Technology Data Exchange (ETDEWEB)

    Cogneras, E

    2007-06-15

    Since it was discovered in 1995 at Fermilab, the top quark is the subject of a great attention. It completes the third quark generation of the standard model of particle physics, and the measurement of its properties constrains strongly this model. It is also a preferential way to probe new physics expected around 1 TeV. This thesis, performed using the Atlas detector at LHC, describes the methods implemented in order to measure precisely the top quark mass in the lepton + jets channel. Several analysis ways are presented in function of the performances of the detector, especially its capacity to identify the b jets. The precise measurement of the top quark mass needs a deep understanding of the jet energy scale. This thesis suggests a strategy to calibrate the light jets using the constraint on the W boson mass, and shows that a precision of 1 GeV{sup 2}/c{sup 2} on the top mass measurement is achievable. An evaluation of the discovery potential of tt-bar resonances, foreseen by models beyond the standard model is also carried out. (author)

  13. Taurins de l’âge du fer au Cameroun septentrional

    OpenAIRE

    Marliac, Alain; Columeau, Philippe

    2013-01-01

    Les recherches en cours sur l’âge du fer (ou post-néolithique) au Cameroun du Nord dans la région du Diamaré lato sensu (Marliac, 1990) ont permis de mettre au jour des restes osseux de Bos taurus dans deux des sites exploités : Goray, dans le Diamaré central, sur les rives du mayo Tsanaga, et Mongossi, dans la partie sableuse de la plaine du Logone (fig. 1). L’analyse de la culture matérielle, de la stratigraphie, ainsi que de séries de datages absolus calibrés à deux sigmas permet d’avancer...

  14. Histoire du monde indien

    OpenAIRE

    Fussman, Gérard

    2014-01-01

    Les indianistes doivent cesser de se définir par la seule référence à l’Inde et se penser aussi en termes de disciplines : l’indianisme n’est que l’application des sciences humaines à une région déterminée du monde. Pour faire œuvre d’historien de l’Inde ancienne, la connaissance du sanskrit demeure toutefois fondamentale : sans elle, pas de contact intime avec la culture de cet immense pays, pas de lecture possible des documents dans leur langue originale. Mais le sanskrit n’est pas toute l’...

  15. Une science du tourisme ?

    OpenAIRE

    Airey, David; Bédard, François; Ceriani-Sebregondi, Giorgia; Chapuis, Amandine; Dewailly, Jean-Michel; Drouin, Martin; Gay, Jean-Christophe; Hillali, Mimoun; Hoerner, Jean-Michel; Jolin, Louis; Kadri, Boualem; Rémy KNAFOU; Leman, Edward; Novakowski, Nick; Priskin, Julianna

    2009-01-01

    Avec ce numéro thématique, Téoros souhaite promouvoir un débat organisé dans une perspective internationale et pluridisciplinaire. L’objectif de ce numéro est de s’interroger à nouveau sur l’identité scientifique du tourisme, en tentant de mettre en évidence les handicaps épistémologiques et méthodologiques, de comprendre les raisons qui freinent la construction d’un consensus au sein de la communauté scientifique, d’identifier les conditions nécessaires à l’émergence d’une science du tourism...

  16. La maison du pendu

    OpenAIRE

    Cátedra, Maria

    2007-01-01

    Traduit de l'espagnol par Dominique Blanc L’étude du suicide relève habituellement de la sociologie ou de la psychologie, plus rarement d'une approche en termes de culture. Le recours à des disciplines traditionnellement soucieuses des applications possibles de leurs analyses est compréhensible dans le cas d'une conduite humaine qui a toujours suscité un désir d'intervention et mobilisé des chercheurs surtout préoccupés par son traitement ou sa prévention. Comprendre l'éthique du suicide sem...

  17. Study of the aging processes in polyurethane adhesives using thermal treatment and differential calorimetric, dielectric, and mechanical techniques ; 1, identifying the aging processes ; 2, quantifying the aging effect

    CERN Document Server

    Althouse, L P

    1979-01-01

    Study of the aging processes in polyurethane adhesives using thermal treatment and differential calorimetric, dielectric, and mechanical techniques ; 1, identifying the aging processes ; 2, quantifying the aging effect

  18. Some examples of a differential calorimeter use for low temperature thermal effects measurement; Quelques exemples d'utilisation d'un calorimetre differentiel a puissance compensee pour des mesures d'anomalies thermiques a basses temperatures

    Energy Technology Data Exchange (ETDEWEB)

    Bochirol, L; Bonjour, E

    1967-07-01

    The principle of a differential calorimeter is briefly described. The apparatus allows a direct and continuous determination of the differential heat-capacity between a sample and a reference, in the range 20 to 600 deg. K approximately. Some examples concerning measurements at low temperatures of reversible or non reversible thermal effects are given. They show the possibilities of the apparatus and are connected with: - detection and measurements of thermal effects associated to structural transformations in elastomers at low temperatures, - measurements of Wigner energy released after neutron irradiations at 77 deg. K for: recrystallized pyro-graphites; high purity iron, aluminium. [French] On decrit brievement le principe d'un calorimetre differentiel qui permet la determination directe et continue de la difference de chaleur specifique apparente entre un echantillon et une reference, dans une gamme de temperatures s'etendant de 20 a 600 deg. K environ. On donne quelques exemples de mesure a basses temperatures d'effets thermiques reversibles ou non reversibles. Ils montrent les possibilites de l'appareillage et concernent: - la detection et la mesure d'effets thermiques associes a des transformations structurales dans des elastomeres a basse temperature, - la mesure du degagement d'energie Wigner apres des irradiations neutroniques a 77 deg. K dans: des pyrographites recristallises; du fer de haute purete et de l'aluminium. (auteurs)

  19. La mesure du danger

    OpenAIRE

    Schmidt, B R

    2013-01-01

    Que signifie l’expression «l’espèce est menacée et figure sur la Liste rouge»? Le présent article se propose d’expliquer la mesure du degré de menace à l’exemple de la Liste rouge des amphibiens de 2005.

  20. Historique du Web

    CERN Multimedia

    TV8 Mont-Blanc

    1995-01-01

    Documentaire court qui retrace l'implication de différentes personalités à la création du Web. Entrevues avec Robert Cailliau, Chris Llewellyn-Smith, David Williams, Tim Berners-Lee, Mike Sendall, Brian Carpenter.

  1. A calorimetric particle detector using an iridium superconducting phase transition thermometer

    International Nuclear Information System (INIS)

    We report on a calorimetric particles detector consisting of an 18.3 g silicon crystal and an iridium superconducting phase transition thermometer. The cryogenic calorimeter and the associated apparatus are described in detail. The pulses from irradiation with an α-particle source have a large unexpected overshoot in addition to the component expected from a naive thermal model. The pulse height spectrum displays an energy resolution of 1 percent FWHM at 6 MeV and good linearity. The noise, electrothermal feedback, and position dependence are discussed. (orig.)

  2. Effect of Experiment Environment on Calorimetric Value of Composite Solid Propellants

    OpenAIRE

    Lalita S. Jawale; Chandrani Dey; Dr. Mehilal; Manoj Gupta; Bhattacharya, B.

    2013-01-01

    The calorimetric value (cal-val) of solid rocket propellants and explosives is determined in the presenceof inert atmosphere using industrial nitrogen gas. However, due to presence of trace amount of oxygen, the cal-val is not always correct. To avoid such inaccuracy in cal-val, a systematic study has been carried out by takingdifferent types of solid propellant samples having burning rate in the range of 5 mm/s − 30 mm/s at different pressures.The data obtained were acquired using industrial...

  3. Relativistic electron precipitation at International Space Station: Space weather monitoring by Calorimetric Electron Telescope

    Science.gov (United States)

    Kataoka, Ryuho; Asaoka, Yoichi; Torii, Shoji; Terasawa, Toshio; Ozawa, Shunsuke; Tamura, Tadahisa; Shimizu, Yuki; Akaike, Yosui; Mori, Masaki

    2016-05-01

    The charge detector (CHD) of the Calorimetric Electron Telescope (CALET) on board the International Space Station (ISS) has a huge geometric factor for detecting MeV electrons and is sensitive to relativistic electron precipitation (REP) events. During the first 4 months, CALET CHD observed REP events mainly at the dusk to midnight sector near the plasmapause, where the trapped radiation belt electrons can be efficiently scattered by electromagnetic ion cyclotron (EMIC) waves. Here we show that interesting 5-20 s periodicity regularly exists during the REP events at ISS, which is useful to diagnose the wave-particle interactions associated with the nonlinear wave growth of EMIC-triggered emissions.

  4. Nanowell-patterned TiO{sub 2} microcantilevers for calorimetric chemical sensing

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Dongkyu, E-mail: dongkyu@ualberta.ca; Chae, Inseok; Thundat, Thomas [Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 2V4 (Canada); Kim, Seonghwan [Department of Mechanical and Manufacturing Engineering, University of Calgary, Calgary, Alberta T2N 1N4 (Canada); Jeon, Sangmin [Department of Chemical Engineering, Pohang University of Science and Technology, Pohang (Korea, Republic of)

    2014-04-07

    A sensitive calorimetric sensor using a TiO{sub 2} microcantilever with nanowells patterned on one of its sides is described. This single material cantilever is sensitive to temperature change without relying on the metal deposition-based bimetallic effect. The thermomechanical sensitivity originates from the structure dependent variations in both the elastic modulus and thermal expansion coefficient due to the presence of ordered nanowells. These cantilever beams offer an alternate and efficient chemical sensing route for vapor phase analytes using photothermal spectroscopy. Selective and sensitive detection of organophosphorus compounds, as well as their photocatalytic decomposition under ultraviolet light exposure are demonstrated.

  5. Micro-calorimetric sensor for vapor phase explosive detection with optimized heat profile

    DEFF Research Database (Denmark)

    Greve, Anders; Olsen, J.; Privorotskaya, N.;

    2010-01-01

    A heater design, used in a micro-calorimetric sensor, has been optimized for temperature uniformity in order to increase the sensitivity and reliability of detection of trace amounts of explosives. In this abstract the design, fabrication and characterization is described. The performance of the...... novel heater design is characterized by measuring the temperature coefficient of resistivity (TCR) values and by mapping the temperature distribution using Raman spectroscopy. The new heater design is seen to have increased the temperature uniformity by a factor of 2.3....

  6. Traceable Pyrgeometer Calibrations

    Energy Technology Data Exchange (ETDEWEB)

    Dooraghi, Mike; Kutchenreiter, Mark; Reda, Ibrahim; Habte, Aron; Sengupta, Manajit; Andreas, Afshin; Newman, Martina

    2016-05-02

    This poster presents the development, implementation, and operation of the Broadband Outdoor Radiometer Calibrations (BORCAL) Longwave (LW) system at the Southern Great Plains Radiometric Calibration Facility for the calibration of pyrgeometers that provide traceability to the World Infrared Standard Group.

  7. Effect of methylamine and plasmin on the conformation of human alpha 2-macroglobulin as revealed by differential scanning calorimetric analysis.

    OpenAIRE

    Cummings, H S; Pizzo, S V; Strickland, D K; Castellino, F J

    1984-01-01

    Differential scanning calorimetric analysis was used as a probe of the conformational alteration in human alpha 2-macroglobulin (AM) upon its complex formation with methylamine and with the protease, human plasmin. The slow electrophoretic form of AM displayed a single thermal transition, characterized by a temperature midpoint (Tm) of 65.8 +/- 0.3 degrees, a calorimetric enthalpy (delta Hc) of 2,550 +/- 150 kcal/mol and a van't Hoff enthalpy (delta Hvh) of 140 kcal/mol. In the presence of su...

  8. Thermodynamic Properties of Liquid Silver-Antimony-Tin Alloys Determined from Electrochemical and Calorimetric Measurements

    Science.gov (United States)

    Łapsa, Joanna; Onderka, Bogusław

    2016-05-01

    The thermodynamic properties of liquid Ag-Sb-Sn alloys were obtained through use of the drop solution calorimetric method and electromotive force (emf) measurements of galvanic cells with a yttria stabilized zirconia (YSZ) solid electrolyte. The experiments were carried out along Ag0.25Sb0.75, Ag0.5Sb0.5 and Ag0.75Sb0.25 sections of the ternary system in the temperature range from 973 K to 1223 K. From the measured emf, the tin activity in liquid solutions of Ag-Sb-Sn was determined for the first time. The partial and integral enthalpy of mixing were determined from calorimetric measurements at two temperatures. These measurements were performed along two cross-sections: Sb0.5Sn0.5 at 912 K and 1075 K, and Ag0.75Sb0.25 at 1075 K. Both experimental data sets were used to find ternary interaction parameters by applying the Redlich-Kister-Muggianu model of the substitutional solution. Consequently, the set of parameters describing the thermodynamic properties of the liquid phase was derived.

  9. Thermodynamic Properties of Liquid Silver-Antimony-Tin Alloys Determined from Electrochemical and Calorimetric Measurements

    Science.gov (United States)

    Łapsa, Joanna; Onderka, Bogusław

    2016-08-01

    The thermodynamic properties of liquid Ag-Sb-Sn alloys were obtained through use of the drop solution calorimetric method and electromotive force (emf) measurements of galvanic cells with a yttria stabilized zirconia (YSZ) solid electrolyte. The experiments were carried out along Ag0.25Sb0.75, Ag0.5Sb0.5 and Ag0.75Sb0.25 sections of the ternary system in the temperature range from 973 K to 1223 K. From the measured emf, the tin activity in liquid solutions of Ag-Sb-Sn was determined for the first time. The partial and integral enthalpy of mixing were determined from calorimetric measurements at two temperatures. These measurements were performed along two cross-sections: Sb0.5Sn0.5 at 912 K and 1075 K, and Ag0.75Sb0.25 at 1075 K. Both experimental data sets were used to find ternary interaction parameters by applying the Redlich-Kister-Muggianu model of the substitutional solution. Consequently, the set of parameters describing the thermodynamic properties of the liquid phase was derived.

  10. Calorimetric determination of the δ hydride dissolution enthalpy in Zircaloy-4

    International Nuclear Information System (INIS)

    In this work, the dissolution enthalpy, ΔHδ→α, of the δ hydride phase in the αZr matrix in Zircaloy-4 has been determined with a differential scanning calorimeter (DSC) in two different ways: by means of a vant Hoff equation, measuring the terminal solubility temperature in dissolution, TSSd, and by direct measurement of the dissolution heat, Qδ→α, as the area between the base line and the calorimetric curve. The application of the DSC technique to the hydride dissolution heat measurements, a transformation which covers an extended temperature range, is completely original and requires a special treatment of the calorimetric curve. These measurements were done on samples, which practically cover the whole solubility range of hydrogen in αZr phase (80-640 ppm). The values obtained, 36.9 kJ/mol H and 39.3 kJ/mol H respectively, are self-consistent and in good agreement with the values of the more recent revisions, but reduces considerably the scatter of the literature data. (author)

  11. Calorimetric Thermoelectric Gas Sensor for the Detection of Hydrogen, Methane and Mixed Gases

    Directory of Open Access Journals (Sweden)

    Nam-Hee Park

    2014-05-01

    Full Text Available A novel miniaturized calorimeter-type sensor device with a dual-catalyst structure was fabricated by integrating different catalysts on the hot (Pd/θ-Al2O3 and cold (Pt/α-Al2O3 ends of the device. The device comprises a calorimeter with a thermoelectric gas sensor (calorimetric-TGS, combining catalytic combustion and thermoelectric technologies. Its response for a model fuel gas of hydrogen and methane was investigated with various combustor catalyst compositions. The calorimetric-TGS devices detected H2, CH4, and a mixture of the two with concentrations ranging between 200 and 2000 ppm at temperatures of 100–400 °C, in terms of the calorie content of the gases. It was necessary to reduce the much higher response voltage of the TGS to H2 compared to CH4. We enhanced the H2 combustion on the cold side so that the temperature differences and response voltages to H2 were reduced. The device response to H2 combustion was reduced by 50% by controlling the Pt concentration in the Pt/α-Al2O3 catalyst on the cold side to 3 wt%.

  12. Jouer du piano

    OpenAIRE

    Fériel Kaddour

    2011-01-01

    La réflexion s’appuie dans un premier temps sur une opposition entre deux attitudes de pianistes  à l’égard du travail à l’instrument : Gould, qui revendique une séparation d’avec le clavier pour ne privilégier que la lecture; Arrau, dont la technique au contraire vise à « faire corps » avec son piano. L’étude de ces deux démarches d’interprètes conduit à une conclusion croisée : l’abstraction gouldienne n’est rien d’autre qu’un déplacement du jeu vers d’autres instruments (ceux qui servent à...

  13. Aux origines du monde

    CERN Multimedia

    2004-01-01

    "C'est l'histoire d'une aventure humaine, scientifique, international qui a vu le jour il y a cinquante ans, aux confins de la Suisse et du département de l'Ain. Le plus grand laboratoire de physique des particules du monde, le Cern, a été fondé en 1954. Les festivités organisées à l occasion de cet anniversaire connaîtront leur point d'orgue le 16 octobre prochain, avec portes-ouvertes, accueil de personallités et inauguration d'un monumnet spécifique, le Globe de l'innovation" (2 pages)

  14. Le chant du monde

    OpenAIRE

    Roger, Philippe

    2015-01-01

    Jean Grémillon emploie la voix dans ses films de manière très différente de ses collègues. C’est l’ensemble du sonore – bruits, voix et musique – qu’il imagine de façon originale. Son traitement s’inscrit dans une vision du monde : Grémillon conçoit le cinématographe comme un biographe, une écriture de la vie. Cette vie est comprise sur deux plans : celui de l’homme et celui de l’univers. La voix selon Grémillon serait le reflet dans l’homme d’un macrocosme perçu comme énigme (le bruit) ou ré...

  15. Les Conidae du Surinam

    NARCIS (Netherlands)

    Mol, van J.-J.

    1973-01-01

    RÉSUMÉ Les prospections des navires océanographiques Snellius et Luymes au large des côtes du Surinam révèlent l'existence de sept espèces de Conidae. Parmi celles-ci une espèce, Conus guyanensis spec. nov., semble endémique à cette région. Six espèces (Conus centurio, C. austini, C. daucus, C. jasp

  16. Les jumelages du Calvados

    Directory of Open Access Journals (Sweden)

    Cécile CHOMBARD-GAUDIN

    1996-03-01

    Full Text Available Les communes du Calvados se distinguent par une propension aux jumelages très supérieure à celle que l'on trouve dans d'autres régions. La majorité concerne des communes britanniques; la proximité géographique et surtout les héritages historiques y expliquent cet essor spectaculaire. Les jumelages avec l'Allemagne sont deux fois moins nombreux.

  17. La mesure du danger

    CERN Document Server

    Manceron, Vanessa; Revet, Sandrine

    2014-01-01

    La mesure du danger permet d’explorer des dangers de nature aussi diverse que la délinquance, la pollution, l’écueil maritime, la maladie ou l’attaque sorcellaire, l’extinction d’espèces animales ou végétales, voire de la Planète tout entière. Au croisement de la sociologie, de l’anthropologie et de l’histoire, les différents articles analysent les pratiques concrètes de mesure pour tenter de comprendre ce qui se produit au cours de l’opération d’évaluation du danger sans préjuger de la nature de celui-ci. L’anthropologie a contribué à la réflexion sur l’infortune en s’intéressant aux temporalités de l’après : maladies, catastrophes, pandémies, etc. et en cherchant à rendre compte de l’expérience des victimes, de leur vie ordinaire bouleversée, de la recomposition du quotidien. Elle s’intéresse aussi aux autres types de mesures, les savoirs incorporés, qui reposent sur l’odorat, la vue ou le toucher et ceux qui ressortent d’une épistémologie « non ...

  18. Radiographie du lobbying en France

    OpenAIRE

    Courty, Guillaume

    2004-01-01

    Les résultats de l'enquête présentée ici proviennent des recherches coordonnées dans le séminaire de sociologie du lobbying du DESS de Droit de la vie politique de l'université Paris X Nanterre durant l'année 2003-2004.

  19. L'Origine du Monde

    CERN Multimedia

    CNET & Ecole Polytechnique Paris; Vincent Ferreira

    1996-01-01

    Création, théologie, science, découverte, recherche, religion, condition humaine.Avec Maurice Jacob physicien, Hubert Curien Président du Conseil du CERN, Michael Doser physicien, Frère Emile Communauté de Taizé.

  20. Measurements of microwave losses in HTS thin films using a calorimetric method

    International Nuclear Information System (INIS)

    Recent improvements in the material quality of in-situ deposited epitaxial thin films of high temperature superconductors are presenting a challenge to the measurement sensitivity of existing microwave cavity perturbation methods for determining microwave loss. A number of different approaches have been pioneered which are based on perturbation measurements of resonant structures incorporating the HTS specimens Here we present results obtained from an alternative approach, which relies on measuring the temperature rise produced by microwave power dissipation occurring in a thermally isolated film and substrate. We also consider the potential improvements in sensitivity which may be realisable with this technique. These calorimetric measurements are compared with those made on the same samples using a modification of the conventional cavity perturbation technique, employing a liquid helium cooled Nb cavity, maintained below its transition temperature, while the enclosed HTS sample can be heated independently of the cavity to a temperature above Tc. (orig.)

  1. On the measurement of energy fluxes in plasmas using a calorimetric probe and a thermopile sensor

    International Nuclear Information System (INIS)

    Two different diagnostics for the determination of the energy influx in plasma processes were used to characterize an ion beam source and an asymmetric RF discharge. The related energy fluxes were measured in dependence on the ion energy and on the RF power, respectively. The first sensor, called HFM (Heat Flux Microsensor) is a thermopile which allows for direct energy flux measurements. With the second sensor, a calorimetric probe, the energy influx has been calculated from the temporal temperature evolution preliminarily registered. Although the working principle of both sensors is different, the obtained results are in good agreement. In the ion beam (-2), whereas the values measured in the asymmetric RF discharge were lower than 50 mW cm-2 for discharge powers in the range 10-100 W. The performances and limitations of both sensors are compared and discussed.

  2. Analytical and experimental characterization of a miniature calorimetric sensor in pulsatile flow

    CERN Document Server

    Gelderblom, H; Haartsen, J R; Rutten, M C M; van de Ven, A A F; van de Vosse, F N; 10.1017/S0022112010004234

    2011-01-01

    The behaviour of a miniature calorimetric sensor, which is under consideration for catheter-based coronary artery flow assessment, is investigated in both steady and pulsatile tube flow. The sensor is composed of a heating element operated at constant power, and two thermopiles that measure flow-induced temperature differences over the sensor surface. An analytical sensor model is developed, which includes axial heat conduction in the fluid and a simple representation of the solid wall, assuming a quasi-steady sensor response to the pulsatile flow. To reduce the mathematical problem, described by a two-dimensional advection-diffusion equation, a spectral method is applied. A Fourier transform is then used to solve the resulting set of ordinary differential equations and an analytical expression for the fluid temperature is found. To validate the analytical model, experiments with the sensor mounted in a tube have been performed in steady and pulsatile water flow with various amplitudes and Strouhal numbers. E...

  3. Biodegradable composites filled with halloysite nanonotubes: Calorimetric investigations and structural issues

    Science.gov (United States)

    Russo, Pietro; Vetrano, Barbara; Acierno, Domenico

    2012-07-01

    Halloysite nanotubes were dispersed in a commercially biodegradable blends by melt compounding. Bionanocomposites based on a film-grade commercial blend of poly(hydroxybutirate)-co-valerate PHBV and poly(butylene adipate-co-therephthalate) PBAT and containg up to 10% by weigth of tubular clays (HNTs) were prepared by using a twin-screw lab extruder and filmed by a film-blowing equipment. Film samples were subjected to thermal and structural investigations. Calorimetric analysis showed that signals shape is clearly affected by the heating and cooling rate, respectively. Structural investigations performed by X-Ray diffraction tests satisfactorily allowed to interpret thermal behavior highlighting the occurrence of different crystalline modifications, depending on the scanning thermal rate, the inclusion of filler and its chemical functionalization.

  4. A calorimetric study on interactions of colchicine with human serum albumin

    Science.gov (United States)

    Zhao, Qiang; Xu, Xiang-Yu; Sun, Xiang-Jun; Liu, Min; Sun, De-Zhi; Li, Lin-Wei

    2009-08-01

    Interaction of colchicine (COL) with human serum albumin (HSA) in buffer solutions (pH 7.2) has been investigated by isothermal titration calorimetry (ITC) combined with circular dichroism (CD) and UV-vis spectra. Heats of the interactions have been determined at 298.15 K. Based on the calorimetric data and reasonable suppositions for the bio-macromolecule - ligand binding process, the equilibrium constants, standard changes of enthalpy, entropy and Gibbs free energy of the processes are obtained. The results show that there are two classes of ligand binding sites. The first-class binding is mainly driven by entropy, while the second-class binding is synergistically driven by entropy and enthalpy. Circular dichroism (CD) and UV-vis spectra show that COL can change the secondary structure of HSA molecule.

  5. Calorimetric observation of single He2* excimers in a 100 mK He bath

    CERN Document Server

    Carter, F W; Rooks, M J; McClintock, P V E; McKinsey, D N; Prober, D E

    2016-01-01

    We report the first calorimetric detection of individual He2* excimers within a bath of superfluid 4He. The detector used in this work is a single superconducting titanium transition edge sensor (TES) with an energy resolution of ~1 eV, immersed directly in the helium bath. He2* excimers are produced in the surrounding bath using an external gamma-ray source. These excimers exist either as short-lived singlet or long-lived triplet states. We demonstrate detection of both states: in the singlet case the calorimeter records the absorption of a prompt 15 eV photon, and in the triplet case the calorimeter records a direct interaction of the molecule with the TES surface, which deposits a distinct fraction of the 15 eV, released upon decay, into the surface. We also briefly discuss the detector fabrication and characterization.

  6. La drogue du jazz

    OpenAIRE

    Hofstein, Francis

    2007-01-01

    Vibration de l’air, la musique est sans contenu, signifiant pur. Elle enseigne donc la perte et le manque, ce fondement de la vie et de la culture humaines. Cela n’empêche ni le plaisir ni la jouissance qu’elle donne, ni son rapport aux droguesLa passion du jazz en est une, vivifiante, même quand elle s’accompagne d’une de ses accumulations appelée collection : domaine de l’avoir, quand la musique est de l’ordre de l’être.

  7. syndrome du canal carpien

    OpenAIRE

    boukraa, kheira; merniz, nacera

    2012-01-01

    Le canal carpien est la principale cause des acroparesthésies de la main. I La forme habituelle est la forme sensitive pure primitive de la femme en période I post ménopausique. Le traitement médical suffit le plus souvent. La constatation et l'installation de signes déficitaires neurologiques sont une indication à un traitement chirurgical. Le syndrome du canal carpien peut être un mode de début d'une polyarthrite u rhumatoïde.

  8. Calorimetric and spectroscopic studies on the interaction of anticancer drug mitoxantrone with human serum albumin

    Energy Technology Data Exchange (ETDEWEB)

    Keswani, Neelam [Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076 (India); Kishore, Nand, E-mail: nandk@chem.iitb.ac.in [Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076 (India)

    2011-09-15

    Highlights: > Human serum albumin exhibits two binding sites for mitoxantrone. > Discrepancies in calorimetric and spectroscopic results clarify binding sites. > Effect of ionic strength on binding permitted detailed analysis of interactions. > Electrostatic interactions predominate in binding. > One binding site on protein does not have tryptophan in immediate vicinity. - Abstract: Binding of the anticancer drug mitoxantrone with the protein human serum albumin (HSA) has been studied by using isothermal titration calorimetry (ITC), in combination with fluorescence, UV-visible, and circular dichroism spectroscopy. The thermodynamic parameters of binding have been evaluated from ITC and spectroscopic results and compared. The ITC results demonstrate that the binding of mitoxantrone with HSA occurs according to two sets of binding sites on the protein as opposed to the fluorescence and UV-visible spectroscopic results. Blockage of one binding site on HSA for mitoxantrone in the presence of NaCl indicates strong involvement of electrostatic interactions in the binding of the drug with the protein. An insignificant temperature dependence of the association constant observed in fluorescence measurements suggests a very low enthalpy of binding which is in close agreement with the results obtained from ITC measurements. Fluorescence life time measurements suggest formation of a static complex between mitoxantrone and HSA. The discrepancies in the ITC and fluorescence results suggest that one of the binding sites on the protein for mitoxantrone does not contain tryptophan residue in its immediate vicinity. The calorimetric and spectroscopic results have provided quantitative information on the binding of mitoxantrone with HSA and suggest that the binding is dominated by electrostatic interactions.

  9. Calorimetric approach for 3D dosimetry of high intensity therapeutic electron beams

    Science.gov (United States)

    Lamanna, E.; Fiorillo, A. S.; Vena, R.; Berdondini, A.; Bettuzzi, M.; Brancaccio, R.; Casali, F.; Morigi, M. P.; Bilokon, H.; Barca, G.; Castrovillari, F.; Siaka, Y. F. T.

    2009-12-01

    The technique of High Dose Rate Intra-Operative Radiation Therapy (HDR-IORT) consists in the delivery of irradiation immediately after the removal of a cancerous mass, where the same incision is used to focalize the radiation to the tumour bed. Given its particular characteristics, IORT requires dose measurements that are different from those requested in external radiotherapy treatments. The main reason lies in the fact that in this case a single high dose must be delivered to a target volume whose extension and depth will be determined directly during the operation. Because of this peculiar characteristics, until now there is not a dosimetric system able to detect the electron beam giving at once a realtime response and an extensive spatial measure of the absorbed dose. Within the framework of a research project of the INFN (Italian National Institute of Nuclear Physics), we proposed a new system to overcome the problems, Dosiort. The final set-up is a solid phantom having a density approximately 1 g/cm3 with sensitive layers of scintillating fibres at fixed positions in a calorimetric configuration for the containment of electrons of energy 4-12 MeV. The prototype will be able to define the physical and geometrical characteristics of the electron beam (energy, isotropy, homogeneity, etc) and to measure the parameters needed to select the energy, the intensity and the Monitor Units (MU) for the exposition: percentage Depth Dose; beam profiles; isodose curves; values of dose per MU. In this work we present the results obtained by using two orthogonal layers of the calorimetric phantom Dosiort, in particular we report the measurement of the dynamic range of the read-out system and the first qualitative study of the results which can be extracted from the measurements taken in a test beam.

  10. Standardization of 3H, 14C and 63Ni radiation sources by calorimetric method

    International Nuclear Information System (INIS)

    The calorimetric method of determination of activity of radionuclides 3H, 14C and 63Ni with low mean energies of β-particles has, as compare to other methods which had been used for determination of activity of these nuclides, a number of advantages, because a nuclide to be measured can be introduced into the calorimeter in any physical and chemical state. It is not necessary to distroy integrity ane leek-proofness of a source wnich can be of arbitrary type. There is no correction for absorption and self-absorption of β-particles and measuring instruments are relatively simple. As a limitation of this method is it's low sensitivity which can be owercomed by means of application of modern high sensitivity calorimeters. Such calorimeters have been developed in the Mendeleev All-Union research Institute. The calorimetric installation consists of 3 independent β-calorimeters of differential-double type, working in the regime of heat equilibrium and beeng intended for different by sise and shape sources. Then, there are thermostatting device of special desighn and electric measuring device. Number of thermocouples in each calorimeter is from 75 to 120 and sensitivity of calorimeters is from 2.45x10-7 to 4.5x10-7 Bt/mm depending on the type of calorimeter. Calorimeters are intended for measuring activities from 109 to 1012 Bk. Error of measurement of activities equals 0.8-1.5% (with confidence level of 0.99%). The main portion of error consists of error in the medium energy β-spectra. The calorimeter error itself is much more lower. Soueces, which have been measured in the calorimeter than can be used for preparation of solutions and sources of lower activity

  11. Trinocular Calibration Method Based on Binocular Calibration

    Directory of Open Access Journals (Sweden)

    CAO Dan-Dan

    2012-10-01

    Full Text Available In order to solve the self-occlusion problem in plane-based multi-camera calibration system and expand the measurement range, a tri-camera vision system based on binocular calibration is proposed. The three cameras are grouped into two pairs, while the public camera is taken as the reference to build the global coordinate. By calibration of the measured absolute distance and the true absolute distance, global calibration is realized. The MRE (mean relative error of the global calibration of the two camera pairs in the experiments can be as low as 0.277% and 0.328% respectively. Experiment results show that this method is feasible, simple and effective, and has high precision.

  12. Les risques du travail

    CERN Document Server

    Thébaud-Mony, Annie

    2015-01-01

    Depuis les années 1990, les conditions de travail se sont peu à peu imposées dans le débat social. Néanmoins, la situation reste critique. Les risques traditionnels n'ont pas disparu : les manutentions lourdes, l'exposition professionnelle aux cancérogènes, au bruit ou aux vibrations demeurent répandues... De plus, certaines " améliorations " n'ont fait que déplacer et dissimuler les problèmes, telle l'externalisation des risques grâce à la sous-traitance. Dans le même temps, les transformations du travail et des modalités de gestion de la main-d'œuvre ont fragilisé les collectifs et accru l'isolement des salariés, conduisant à une montée visible de la souffrance psychique. Face à ces évolutions, il est plus que jamais nécessaire que tous les acteurs concernés, en particulier les salariés eux-mêmes et leurs représentants, s'approprient les connaissances indispensables pour améliorer la protection de la santé sur les lieux du travail. Tel est le but de ce livre, qui renouvelle int�...

  13. Automated Camera Calibration

    Science.gov (United States)

    Chen, Siqi; Cheng, Yang; Willson, Reg

    2006-01-01

    Automated Camera Calibration (ACAL) is a computer program that automates the generation of calibration data for camera models used in machine vision systems. Machine vision camera models describe the mapping between points in three-dimensional (3D) space in front of the camera and the corresponding points in two-dimensional (2D) space in the camera s image. Calibrating a camera model requires a set of calibration data containing known 3D-to-2D point correspondences for the given camera system. Generating calibration data typically involves taking images of a calibration target where the 3D locations of the target s fiducial marks are known, and then measuring the 2D locations of the fiducial marks in the images. ACAL automates the analysis of calibration target images and greatly speeds the overall calibration process.

  14. ORNL calibrations facility

    International Nuclear Information System (INIS)

    The ORNL Calibrations Facility is operated by the Instrumentation Group of the Industrial Safety and Applied Health Physics Division. Its primary purpose is to maintain radiation calibration standards for calibration of ORNL health physics instruments and personnel dosimeters. This report includes a discussion of the radioactive sources and ancillary equipment in use and a step-by-step procedure for calibration of those survey instruments and personnel dosimeters in routine use at ORNL

  15. Analytical multicollimator camera calibration

    Science.gov (United States)

    Tayman, W.P.

    1978-01-01

    Calibration with the U.S. Geological survey multicollimator determines the calibrated focal length, the point of symmetry, the radial distortion referred to the point of symmetry, and the asymmetric characteristiecs of the camera lens. For this project, two cameras were calibrated, a Zeiss RMK A 15/23 and a Wild RC 8. Four test exposures were made with each camera. Results are tabulated for each exposure and averaged for each set. Copies of the standard USGS calibration reports are included. ?? 1978.

  16. Spiral reader calibration

    International Nuclear Information System (INIS)

    The method to calibrate the spiral reader (SR) is presented. A brief description of the main procedures of the calibration program SCALP, adapted for the IHEP equipment and purposes, is described. The precision characteristics of the IHEP SR have been analysed on the results, presented in the form of diagrams. There is a calibration manual for the user

  17. An analysis of calibration curve models for solid-state heat-flow calorimeters

    Energy Technology Data Exchange (ETDEWEB)

    Hypes, P. A. (Philip A.); Bracken, D. S. (David S.); McCabe, G. (George)

    2001-01-01

    Various calibration curve models for solid-state calorimeters are compared to determine which model best fits the calibration data. The calibration data are discussed. The criteria used to select the best model are explained. A conclusion regarding the best model for the calibration curve is presented. These results can also be used to evaluate the random and systematic error of a calorimetric measurement. A linear/quadratic model has been used for decades to fit the calibration curves for wheatstone bridge calorimeters. Excellent results have been obtained using this calibration curve model. The Multical software package uses this model for the calibration curve. The choice of this model is supported by 40 years [1] of calorimeter data. There is good empirical support for the linear/quadratic model. Calorimeter response is strongly linear. Calorimeter sensitivity is slightly lower at higher powers; the negative coefficient of the x{sup 2} term accounts for this. The solid-state calorimeter is operated using the Multical [2] software package. An investigation was undertaken to determine if the linear/quadratic model is the best model for the new sensor technology used in the solid-state calorimeter.

  18. An analysis of calibration curve models for solid-state heat-flow calorimeters

    International Nuclear Information System (INIS)

    Various calibration curve models for solid-state calorimeters are compared to determine which model best fits the calibration data. The calibration data are discussed. The criteria used to select the best model are explained. A conclusion regarding the best model for the calibration curve is presented. These results can also be used to evaluate the random and systematic error of a calorimetric measurement. A linear/quadratic model has been used for decades to fit the calibration curves for wheatstone bridge calorimeters. Excellent results have been obtained using this calibration curve model. The Multical software package uses this model for the calibration curve. The choice of this model is supported by 40 years (1) of calorimeter data. There is good empirical support for the linear/quadratic model. Calorimeter response is strongly linear. Calorimeter sensitivity is slightly lower at higher powers; the negative coefficient of the x2 term accounts for this. The solid-state calorimeter is operated using the Multical (2) software package. An investigation was undertaken to determine if the linear/quadratic model is the best model for the new sensor technology used in the solid-state calorimeter.

  19. Jouer du piano

    Directory of Open Access Journals (Sweden)

    Fériel Kaddour

    2011-04-01

    Full Text Available La réflexion s’appuie dans un premier temps sur une opposition entre deux attitudes de pianistes  à l’égard du travail à l’instrument : Gould, qui revendique une séparation d’avec le clavier pour ne privilégier que la lecture; Arrau, dont la technique au contraire vise à « faire corps » avec son piano. L’étude de ces deux démarches d’interprètes conduit à une conclusion croisée : l’abstraction gouldienne n’est rien d’autre qu’un déplacement du jeu vers d’autres instruments (ceux qui servent à la prise de son et au montage de ses enregistrements ; le « faire-corps » hérité de la culture pianistique romantique est plus dialectique que fusionnel, et en cela implique une capacité de mise à distance. A partir de cette double conclusion, on tâche enfin de repenser la place du jeu à l’instrument dans la mise en œuvre d’une interprétation, en interrogeant le dialogue qui s’instaure entre la partition telle qu’elle s’écrit et le geste tel qu’il se joue.Our study leans on an opposition between two pianists' attitudes about their work with the instrument. Gould claims a necessary separation from the keyboard in order to prioritize reading. Arrau, on the contrary, relies on a technique which consists in “being one” with his piano. The analysis of these two interprets’ behaviours leads to a crossed conclusion: the gouldian abstraction is nothing else than a displacement of the playing towards another kind of instruments, the ones he uses in sound recording and cut up; Arrau’s “being one” is more dialectic than at first sight, and it therefore implies a real distancing from the piano. This constatation leads to rethink the place of the piano playing in the setting of an interpretation, and to highlight the real dialogue which develops itself between the score as it has been written and the gesture as it is played.

  20. Residual gas analyzer calibration

    Science.gov (United States)

    Lilienkamp, R. H.

    1972-01-01

    A technique which employs known gas mixtures to calibrate the residual gas analyzer (RGA) is described. The mass spectra from the RGA are recorded for each gas mixture. This mass spectra data and the mixture composition data each form a matrix. From the two matrices the calibration matrix may be computed. The matrix mathematics requires the number of calibration gas mixtures be equal to or greater than the number of gases included in the calibration. This technique was evaluated using a mathematical model of an RGA to generate the mass spectra. This model included shot noise errors in the mass spectra. Errors in the gas concentrations were also included in the valuation. The effects of these errors was studied by varying their magnitudes and comparing the resulting calibrations. Several methods of evaluating an actual calibration are presented. The effects of the number of gases in then, the composition of the calibration mixture, and the number of mixtures used are discussed.

  1. Femmes du Maghreb

    OpenAIRE

    Leduc, Claudine; Fine, Agnès

    2003-01-01

    L'actualité, comme toujours, suscite la réflexion historique. Devant le déchaînement de la violence en Algérie, CLIO avait programmé, dès sa fondation en 1995, un numéro consacré aux Femmes d'Algérie où se seraient exprimés des chercheurs (euses) d'Algérie. C'était pour son comité de rédaction une façon de dire, comme il le pouvait, sa solidarité à ceux qui vivaient dans la quotidienneté de la terreur. Il a demandé à Djamila Amrane, titulaire depuis 1994 du poste d'« Histoire des Femme...

  2. Pratiques du secret

    OpenAIRE

    BORELLO, Céline; Domont, Stéphanie; Estier, Delphine; Kaiser, Wolfgang; Le Person, Xavier; Montenach, Anne

    2006-01-01

    Le secret et la dissimulation sont, à l’époque moderne (et bien au-delà), au cœur d’une vaste réflexion savante sur l’art de gouverner et sur la conduite adaptée à la vie en société. Les études rassemblées ici ne considèrent le secret ni comme une vérité cachée – les arcana imperii – ni comme une qualité transcendante – les mystères de l’État. Elles mettent l’accent sur les pratiques et les usages du secret, sur le secret social comme mode d’agir. Elles montrent par là que le discours sur le ...

  3. Le sacre du printemps

    Directory of Open Access Journals (Sweden)

    Denise Pumain

    2002-03-01

    Full Text Available Cybergeo aura six ans en avril : dans la réalité du virtuel, dans l'univers récent et fluctuant de la publication en ligne, cela fait de nous, tout à la fois, des pionniers et des vétérans. De façon plus surprenante, il se trouve que nous sommes aussi uniques : parmi toutes les revues électroniques de sciences sociales, aucune ne combine comme Cybergeo ancienneté, publication exclusivement électronique, liberté d'accès au texte intégral, édition et gestion par des chercheurs, et comité de lec...

  4. La musique du malentendu

    OpenAIRE

    Abbrugiati, Raymond

    2011-01-01

    La « petite musique » du style tabucchien rencontre souvent la musique tout court : personnages musiciens, musique en arrière-plan des récits, ou au centre de la trame narrative, donnent une projection artistique au problème d’une harmonie impossible entre des êtres qui “n’entendent” pas les événements de la même manière. Il s’agira d’examiner les récits de Tabucchi où la musique joue un rôle flagrant, pour définir ce rôle et, au-delà de leur diégèse propre, de comprendre de quelle métaphore ...

  5. Les flux du futur

    OpenAIRE

    Davidts, M.

    1996-01-01

    L'analyse par fluorescence de rayons X est une méthode très fiable dont les résultats dépendent très largement des techniques de préparation de l'échantillon. La fusion à l'aide de borates est reconnue comme la technique actuelle la plus fiable. Les propriétés physico-chimiques du fondant sélectionné joue un rôle prépondérant. Les caractéristiques des nouveaux fondants fondus anhydres très faiblement hygroscopiques une ayant une perte au feu minimale, une parfaite homogénéité, une granulométr...

  6. La maison du jardinier

    OpenAIRE

    Heitzmann, Annick

    2015-01-01

    En 1749, Louis XV établit une ménagerie près du château de Trianon. Avec cet établissement, il projetait un jardin fleuriste et proposa à l’horticulteur Claude Richard la direction de ce jardin et son installation à Trianon. Pour le loger, une maison fut construite sur le terrain de la pépinière, situé à proximité des plantations dont il aurait à s’occuper. L’ordre de cette construction fut donné le 17 septembre 1750 et, en octobre, les terrassiers étaient en train de creuser les caves. Le bâ...

  7. Le Brahmane du Komintern

    Directory of Open Access Journals (Sweden)

    Elizabeth Burgos

    2008-01-01

    Full Text Available Le Brahmane du Komintern, largometraje documental del realizador francés Vladimir León, constituye un ejercicio ejemplar de investigación histórica y  de lograda factura de realización. Y, pese a no haber contado con la ayuda de ninguno organismo público, se trata de un ambicioso proyecto que cubre una amplia extensión geográfica que abarca: Estados Unidos, México, Moscú, Berlín, y la India. Gira en torno a una figura que tuvo en su tiempo su hora de gloria. Un bengalí, hijo de braman, la c...

  8. OPERATION DU FOISONNEMENT

    Directory of Open Access Journals (Sweden)

    Gholamreza Djelveh

    2010-04-01

    Full Text Available Mousses alimentaires sont un sous-ensemble des aliments connus sous le nom de produits fouettés ou des produits aérés. Ils sont des produits formulés avec des qualités telles que la légèreté et la souplesse et sont principalement consommés à l'apéritif ou au dessert. Les produits en mousse obtenue par dispersion d'un gaz dans une matrice alimentaire (la phase continue ont connu un développement croissant au cours des années 80 et 90. Le processus d'aération liés à leurs activités de production est appelée l'expansion ou à fouetter. Le document présente les principaux-paramètres du procédé du point permanent de la formulation, la mise en œuvre processus dans les installations pilotes et à l'échelle industrielle, la caractérisation des produits finis, la base énergétique de l'échelle de processus en place, et le lien entre la formulation, émulsion préparation de l'expansion. Cette vue d'ensemble de l'opération d'expansion continue, nous a permis de mettre en évidence le fait qu'il ya des opérations de l'unité encore mal décrite par le génie des procédés et pour lesquels les méthodes et outils pour l'extrapolation et la prédiction sont encore à leurs balbutiements.

  9. The calorimetric spectrum of the electron-capture decay of $^{163}$Ho. A preliminary analysis of the preliminary data

    CERN Document Server

    De Rújula, A

    2015-01-01

    It is in principle possible to measure directly the electron neutrino mass (or masses and mixing angles) in weak electron-capture decays. The optimal nuclide in this respect is $^{163}$Ho. The favoured experimental technique, currently pursued in various experiments (ECHo, HOLMES and NuMECS) is "calorimetric". The calorimetric energy spectrum is a sum over the unstable vacant orbitals, or "holes", left by the electrons weakly captured by the nucleus. We discuss the current progress in this field and analize the preliminary data. Our conclusion is that, as pointed out by Robertson, the contribution of two-hole states is not negligible. But --in strong contradistinction with the tacit conclusion of previous comparisons of theory and observations-- we find a quite satisfactory agreement. A crucial point is that, in the creation of secondary holes, electron shakeoff and not only electron shakeup must be taken into account.

  10. X-ray diffraction and calorimetric phase study of a binary paraffin : C23H48-C24H50

    International Nuclear Information System (INIS)

    The phase diagram of the binary paraffin system C23H48-C24H50 was determined by calorimetric and X-ray diffraction methods. The present experimental results together with previous work on pure C23H48 and C24H50 paraffins allows to identify all the detected phases. The composition and temperature dependences of the crystalline lattice parameters were also investigated. (Author)

  11. Detection of hydrogen peroxide vapor by use of manganese(IV) oxide as catalyst for calorimetric gas sensors

    OpenAIRE

    Oberländer, Jan; Kirchner, Patrick; Boyen, Hans-Gerd; Schöning, Michael J.

    2014-01-01

    In this work, the catalyst manganese(IV) oxide (MnO2), of calorimetric gas sensors (to monitor the sterilization agent vaporized hydrogen peroxide) has been investigated in more detail. Chemical analyses by means of X-ray-induced photoelectron spectroscopy have been performed to unravel the surface chemistry prior and after exposure to hydrogen peroxide vapor at elevated temperature, as applied in the sterilization processes of beverage cartons. The surface characterization reveals a change i...

  12. Calorimetric low temperature detectors for low-energetic heavy ions and their application in accelerator mass spectrometry

    International Nuclear Information System (INIS)

    The energy-sensitive detection of heavy ions with calorimetric low temperature detectors was investigated in the energy range of E=0.1-1 MeV/amu, commonly used for accelerator mass spectrometry (AMS). The detectors used consist of sapphire absorbers and superconducting aluminum transition edge thermometers operated at T∼1.5 K. They were irradiated with various ion beams (13C,197Au,238U) provided by the VERA tandem accelerator in Vienna, Austria. The relative energy resolution obtained was ΔE/E=(5-9)x10-3, even for the heaviest ions such as 238U. In addition, no evidence for a pulse height defect was observed. This performance allowed for the first time to apply a calorimetric low temperature detector in an AMS experiment. The aim was to precisely determine the isotope ratio of 236U/238U for several samples of natural uranium, 236U being known as a sensitive monitor for neutron fluxes. Replacing a conventionally used detection system at VERA by the calorimetric detector enabled to substantially reduce background from neighboring isotopes and to increase the detection efficiency. Due to the high sensitivity achieved, a value of 236U/238U=6.1x10-12 could be obtained, representing the smallest 236U/238U ratio measured at the time. In addition, we contributed to establishing an improved material standard of 236U/238U, which can be used as a reference for future AMS measurements.

  13. Heat-conducting calorimeter for measuring flux density of ionizing radiation and technique for its calorimetric cell fabrication

    International Nuclear Information System (INIS)

    A heat-conducting calorimeter to determine ionizing radiation flux density has been described. The calorimeter contains an absorbing radiation sample placed inside diathermal calorimetric cell. The cell presents an auxiliary wall in the form of a battery of galvanic thermocouples oined in series, which are in thermal contact with the sample. To decrease the calorimeter inertia, its thermal battery is fabricated in the form of a thin-walled cylindrical cover, shaped like a trapezium cut along spiral line and consisting of alternating mono- and bimetal foil parts with transition points in the middle of the trapezium bases. The way of calorimetric cell obtaining by means of galvanic deposition of couple thermoelectric material per one of the branches of every element in thermal battery is also described. Efficiency of the heat-conducting calorimeter suggested and the way of its calorimetric cell obtaining is conditioned by the device universal character and simplicity of fabrication technique of any typical dimensions of the calorimeter, by the possibility to obtain thermosensitive element of the calorimeter in one technological cycle of galvanic deposition as well as by simplification of fabrication technique and calorimeter assembling

  14. Status and performance of the CALorimetric Electron Telescope (CALET) on the International Space Station

    Energy Technology Data Exchange (ETDEWEB)

    Adriani, O. [University of Florence, IFAC (CNR) and INFN (Italy); Akaike, Y. [ICRR, University of Tokyo (Japan); Asaoka, Y. [Waseda University (Japan); Asano, K. [Tokyo Institute of Technology (Japan); Bagliesi, M.G.; Bigongiari, G. [University of Siena and INFN (Italy); Binns, W.R. [Washington University-St. Louis (United States); Bongi, M. [University of Florence, IFAC (CNR) and INFN (Italy); Buckley, J.H. [Washington University-St. Louis (United States); Cassese, A.; Castellini, G. [University of Florence, IFAC (CNR) and INFN (Italy); Cherry, M.L. [Louisiana State University (United States); Collazuol, G. [University of Padova and INFN (Italy); Ebisawa, K. [JAXA/ISAS (Japan); Di Felice, V. [University of Rome Tor Vergata and INFN (Italy); Fuke, H. [JAXA/ISAS (Japan); Guzik, T.G. [Louisiana State University (United States); Hams, T. [CRESST/NASA/GSFC and University of Maryland (United States); Hasebe, N. [Waseda University (Japan); Hareyama, M. [St. Marianna University School of Medicine (Japan); and others

    2014-11-15

    The CALorimetric Electron Telescope (CALET) space experiment, currently under development by Japan in collaboration with Italy and the United States, will measure the flux of cosmic-ray electrons (including positrons) to 20 TeV, gamma rays to 10 TeV and nuclei with Z=1 to 40 up to 1,000 TeV during a two-year mission on the International Space Station (ISS), extendable to five years. These measurements are essential to search for dark matter signatures, investigate the mechanism of cosmic-ray acceleration and propagation in the Galaxy and discover possible astrophysical sources of high-energy electrons nearby the Earth. The instrument consists of two layers of segmented plastic scintillators for the cosmic-ray charge identification (CHD), a 3 radiation length thick tungsten-scintillating fiber imaging calorimeter (IMC) and a 27 radiation length thick lead-tungstate calorimeter (TASC). CALET has sufficient depth, imaging capabilities and excellent energy resolution to allow for a clear separation between hadrons and electrons and between charged particles and gamma rays. The instrument will be launched to the ISS within 2014 Japanese Fiscal Year (by the end of March 2015) and installed on the Japanese Experiment Module-Exposed Facility (JEM-EF). In this paper, we will review the status and main science goals of the mission and describe the instrument configuration and performance.

  15. Algorithms for Identification of Nearly-Coincident Events in Calorimetric Sensors

    CERN Document Server

    Alpert, B; Bennett, D; Faverzani, M; Fowler, J; Giachero, A; Hays-Wehle, J; Maino, M; Nucciotti, A; Puiu, A; Swetz, D; Ullom, J

    2015-01-01

    For experiments with high arrival rates, reliable identification of nearly-coincident events can be crucial. For calorimetric measurements to directly measure the neutrino mass such as HOLMES, unidentified pulse pile-ups are expected to be a leading source of experimental error. Although Wiener filtering can be used to recognize pile-up, it suffers errors due to pulse-shape variation from detector nonlinearity, readout dependence on sub-sample arrival times, and stability issues from the ill-posed deconvolution problem of recovering Dirac delta-functions from smooth data. Due to these factors, we have developed a processing method that exploits singular value decomposition to (1) separate single-pulse records from piled-up records in training data and (2) construct a model of single-pulse records that accounts for varying pulse shape with amplitude, arrival time, and baseline level, suitable for detecting nearly-coincident events. We show that the resulting processing advances can reduce the required performa...

  16. A combined calorimetric and computational study of the energetics of rare earth substituted UO2 systems

    International Nuclear Information System (INIS)

    The energetics of rare earth substituted UO2 solid solutions (U1−xLnxO2−0.5x+y, where Ln = La, Y, and Nd) are investigated employing a combination of calorimetric measurements and density functional theory based computations. Calculated and measured formation enthalpies agree within 10 kJ/mol for stoichiometric oxygen/metal compositions. To better understand the factors governing the stability and defect binding in rare earth substituted urania solid solutions, systematic trends in the energetics are investigated based on the present results and previous computational and experimental thermochemical studies of rare earth substituted fluorite oxides (A1−xLnxO2−0.5x, where A = Hf, Zr, Ce, and Th). A consistent trend towards increased energetic stability with larger size mismatch between the smaller host tetravalent cation and the larger rare earth trivalent cation is found for both actinide and non-actinide fluorite oxide systems where aliovalent substitution of Ln cations is compensated by oxygen vacancies. However, the large exothermic oxidation enthalpy in the UO2 based systems favors oxygen rich compositions where charge compensation occurs through the formation of uranium cations with higher oxidation states

  17. Effect of sulfoxides on the thermal denaturation of hen lysozyme: A calorimetric and Raman study

    Science.gov (United States)

    Torreggiani, A.; Di Foggia, M.; Manco, I.; De Maio, A.; Markarian, S. A.; Bonora, S.

    2008-11-01

    A multidisciplinary study of the thermal denaturation of lysozyme in the presence of three sulfoxides with different length in hydrocarbon chain (DMSO, DESO, and DPSO) was carried out by means of DSC, Raman spectroscopy, and SDS-PAGE techniques. In particular, the Td and Δ H values obtained from the calorimetric measurements showed that lysozyme is partially unfolded by sulfoxides but most of the conformation holds native state. The sulfoxide denaturing ability increases in the order DPSO > DESO > DMSO. Moreover, only DMSO and DESO have a real effect in preventing the heat-induced inactivation of the protein and their maximum heat-protective ability is reached when the DMSO and DESO amount is ⩾25% w/w. The sulfoxide ability to act as effective protective agents against the heat-induced inactivation was confirmed by the protein analysis. The enzymatic activity, as well as the SDS-PAGE analysis, suggested that DESO, having a low hydrophobic character and a great ability to stabilise the three-dimensional water structure, is the most heat-protective sulfoxide. An accurate evaluation of the heat-induced conformational changes of the lysozyme structure before and after sulfoxide addition was obtained by the analysis of the Raman spectra. The addition of DMSO or DESO in low concentration resulted to sensitively decrease the heat-induced structural modifications of the protein.

  18. Calorimetric features of IgM gammopathies. Implication for patient’s diagnosis and monitoring

    Energy Technology Data Exchange (ETDEWEB)

    Krumova, Sashka; Todinova, Svetla; Danailova, Avgustina [Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl. 21, 1113 Sofia (Bulgaria); Petkova, Violeta; Dimitrova, Keranka; Gartcheva, Lidia [National Specialized Hospital for Active Treating of Haematological Diseases, Sofia 1756 (Bulgaria); Taneva, Stefka G., E-mail: stefka.germanova@ehu.es [Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl. 21, 1113 Sofia (Bulgaria); Unidad de Biofísica (CSIC-UPV/EHU) and Departamento de Bioquímica y Biología Molecular, Universidad del País Vasco, 48080 Bilbao (Spain)

    2015-09-10

    Highlights: • DSC reveals distinct calorimetric features for IgM gammopaties. • Calorimetry sets of IgM multiple myeloma and Waldenström’s macroglobulinemia patients. • DSC features correlate with the level of involved IgM heavy/light chains. • DSC and “Heavylite” are complementary methods for patients diagnostics/monitoring. - Abstract: The serum proteome of patients featuring immunoglobulin M (IgM) gammopathy and diagnosed as having IgM multiple myeloma or Waldenström’s macroglobulinemia was characterized by differential scanning calorimetry and HevyLite™ (HLC) assay. The thermodynamic properties of the thermograms and their deviation from the typical healthy thermogram were found to correlate with the monoclonal protein concentration and the level of the involved (monoclonal) IgM heavy/light chains. Patients monitoring during treatment showed that the variations in the shape of the DSC profiles corresponded to fluctuations of the IgM heavy/light chain levels verifying the two parameters as non-invasive markers for disease progression.

  19. Status and performance of the CALorimetric Electron Telescope (CALET) on the International Space Station

    International Nuclear Information System (INIS)

    The CALorimetric Electron Telescope (CALET) space experiment, currently under development by Japan in collaboration with Italy and the United States, will measure the flux of cosmic-ray electrons (including positrons) to 20 TeV, gamma rays to 10 TeV and nuclei with Z=1 to 40 up to 1,000 TeV during a two-year mission on the International Space Station (ISS), extendable to five years. These measurements are essential to search for dark matter signatures, investigate the mechanism of cosmic-ray acceleration and propagation in the Galaxy and discover possible astrophysical sources of high-energy electrons nearby the Earth. The instrument consists of two layers of segmented plastic scintillators for the cosmic-ray charge identification (CHD), a 3 radiation length thick tungsten-scintillating fiber imaging calorimeter (IMC) and a 27 radiation length thick lead-tungstate calorimeter (TASC). CALET has sufficient depth, imaging capabilities and excellent energy resolution to allow for a clear separation between hadrons and electrons and between charged particles and gamma rays. The instrument will be launched to the ISS within 2014 Japanese Fiscal Year (by the end of March 2015) and installed on the Japanese Experiment Module-Exposed Facility (JEM-EF). In this paper, we will review the status and main science goals of the mission and describe the instrument configuration and performance

  20. The CALorimetric Electron Telescope (CALET for high-energy astroparticle physics on the International Space Station

    Directory of Open Access Journals (Sweden)

    Adriani O.

    2015-01-01

    Full Text Available The CALorimetric Electron Telescope (CALET is a space experiment, currently under development by Japan in collaboration with Italy and the United States, which will measure the flux of cosmic-ray electrons (and positrons up to 20 TeV energy, of gamma rays up to 10 TeV, of nuclei with Z from 1 to 40 up to 1 PeV energy, and will detect gamma-ray bursts in the 7 keV to 20 MeV energy range during a 5 year mission. These measurements are essential to investigate possible nearby astrophysical sources of high energy electrons, study the details of galactic particle propagation and search for dark matter signatures. The main detector of CALET, the Calorimeter, consists of a module to identify the particle charge, followed by a thin imaging calorimeter (3 radiation lengths with tungsten plates interleaving scintillating fibre planes, and a thick energy measuring calorimeter (27 radiation lengths composed of lead tungstate logs. The Calorimeter has the depth, imaging capabilities and energy resolution necessary for excellent separation between hadrons, electrons and gamma rays. The instrument is currently being prepared for launch (expected in 2015 to the International Space Station ISS, for installation on the Japanese Experiment Module - Exposure Facility (JEM-EF.

  1. Calorimetric studies and lessons on fires and explosions of a chemical plant producing CHP and DCPO

    International Nuclear Information System (INIS)

    Highlights: ► We analyzed fire and explosion incidents in a plant producing CHP and DCPO. ► Data from calorimeters reveal causes and phenomena associated with the incidents. ► The credible worst scenario was thermal explosion. ► Incidents may be avoided by implementing DIERS methodology. - Abstract: Cumene hydroperoxide (CHP) has been used in producing phenol, dicumyl peroxide (DCPO) and as an initiator for synthesizing acrylonitrile–butadiene–styrene (ABS) resin by copolymerization in Taiwan. Four incidents of fire and explosion induced by thermal runaway reactions were occurred in a same plant producing CHP, DCPO and bis-(tert-butylperoxy isopropyl) benzene peroxide (BIBP). The fourth fire and explosion occurred in the CHP reactor that resulted in a catastrophic damage in reaction region and even spread throughout storage area. Descriptions on the occurrences of these incidents were assessed by the features of processes, reaction schemes and unexpected side reactions. Calorimetric data on thermokinetics and pressure were used for explaining the practical consequences or which the worst cases encountered in this kind of plant. Acceptable risk associated with emergency relief system design is vital for a plant producing organic peroxide. These basic data for designing an inherently safer plant can be conducted from adiabatic calorimetry. An encouraging deduction has been drawn here, these incidents may be avoided by the implementation of API RP 520, API RP 521, DIERS technology, OSHA 1910.119 and AIChE's CCPS recommended PSM elements.

  2. Electron energy and charge albedos - calorimetric measurement vs Monte Carlo theory

    International Nuclear Information System (INIS)

    A new calorimetric method has been employed to obtain saturated electron energy albedos for Be, C, Al, Ti, Mo, Ta, U, and UO2 over the range of incident energies from 0.1 to 1.0 MeV. The technique was so designed to permit the simultaneous measurement of saturated charge albedos. In the cases of C, Al, Ta, and U the measurements were extended down to about 0.025 MeV. The angle of incidence was varied from 00 (normal) to 750 in steps of 150, with selected measurements at 82.50 in Be and C. In each case, state-of-the-art predictions were obtained from a Monte Carlo model. The generally good agreement between theory and experiment over this extensive parameter space represents a strong validation of both the theoretical model and the new experimental method. Nevertheless, certain discrepancies at low incident energies, especially in high-atomic-number materials, and at all energies in the case of the U energy albedos are not completely understood

  3. Calorimetric features of IgM gammopathies. Implication for patient’s diagnosis and monitoring

    International Nuclear Information System (INIS)

    Highlights: • DSC reveals distinct calorimetric features for IgM gammopaties. • Calorimetry sets of IgM multiple myeloma and Waldenström’s macroglobulinemia patients. • DSC features correlate with the level of involved IgM heavy/light chains. • DSC and “Heavylite” are complementary methods for patients diagnostics/monitoring. - Abstract: The serum proteome of patients featuring immunoglobulin M (IgM) gammopathy and diagnosed as having IgM multiple myeloma or Waldenström’s macroglobulinemia was characterized by differential scanning calorimetry and HevyLite™ (HLC) assay. The thermodynamic properties of the thermograms and their deviation from the typical healthy thermogram were found to correlate with the monoclonal protein concentration and the level of the involved (monoclonal) IgM heavy/light chains. Patients monitoring during treatment showed that the variations in the shape of the DSC profiles corresponded to fluctuations of the IgM heavy/light chain levels verifying the two parameters as non-invasive markers for disease progression

  4. Effect of Experiment Environment on Calorimetric Value of Composite Solid Propellants

    Directory of Open Access Journals (Sweden)

    Lalita S. Jawale

    2013-09-01

    Full Text Available The calorimetric value (cal-val of solid rocket propellants and explosives is determined in the presence of inert atmosphere using industrial nitrogen gas. However, due to presence of trace amount of oxygen, the cal-val is not always correct. To avoid such inaccuracy in cal-val, a systematic study has been carried out by taking different types of solid propellant samples having burning rate in the range of 5 mm/s − 30 mm/s at different pressures. The data obtained were acquired using industrial nitrogen, ultra high pure nitrogen (UHP-N2, ultra high pure argon (UHP-Ar, air and ultra high pure oxygen (UHP-O2. The data reveal that cal-val is highest in the case of UHP-O2 due to complete combustion while in the case of air and industrial nitrogen it is found to be substantially less. Moreover, the cal-val in the presence of UHP-N2 and UHP-Ar meets the standard value with reproducibility. The results, further, confirm that for authentic cal-val, the most suitable environment is UHP-N2/UHP-Ar.

  5. Effect of Experiment Environment on Calorimetric Value of Composite Solid Propellants

    Directory of Open Access Journals (Sweden)

    Lalita S. Jawale

    2013-09-01

    Full Text Available The calorimetric value (cal-val of solid rocket propellants and explosives is determined in the presenceof inert atmosphere using industrial nitrogen gas. However, due to presence of trace amount of oxygen, the cal-val is not always correct. To avoid such inaccuracy in cal-val, a systematic study has been carried out by takingdifferent types of solid propellant samples having burning rate in the range of 5 mm/s − 30 mm/s at different pressures.The data obtained were acquired using industrial nitrogen, ultra high pure nitrogen (UHP-N2, ultra high pureargon (UHP-Ar, air and ultra high pure oxygen (UHP-O2. The data reveal that cal-val is highest in the case ofUHP-O2 due to complete combustion while in the case of air and industrial nitrogen it is found to be substantiallyless. Moreover, the cal-val in the presence of UHP-N2 and UHP-Ar meets the standard value with reproducibility.The results, further, confirm that for authentic cal-val, the most suitable environment is UHP-N2/UHP-Ar.Defence Science Journal, 2013, 63(5, pp.467-472, DOI:http://dx.doi.org/10.14429/dsj.63.2896

  6. First application of calorimetric low-temperature detectors in accelerator mass spectrometry

    International Nuclear Information System (INIS)

    For the first time, calorimetric low-temperature detectors were applied in accelerator mass spectrometry, a well-known method for determination of very small isotope ratios with high sensitivity. The aim of the experiment was to determine with high accuracy the isotope ratio of 236U/238U for several samples of natural uranium, 236U being known as a sensitive monitor for neutron flux. Measurements were performed at the VERA tandem accelerator at Vienna, Austria. The detectors consist of sapphire absorbers and superconducting transition edge thermometers operated at T∼ 1.5 K. The relative energy resolution obtained for 17.39 MeV 238U is ΔE/E=4-9x10-3, depending on the experimental conditions. This performance enabled to substantially reduce background from neighbouring isotopes and to increase the detection efficiency. Due to the high sensitivity achieved, a value of 236U/238U=6.5x10-12 could be obtained, representing the smallest 236U/238U ratio measured until now

  7. Studies of atomic collisions in solids by means of calorimetric techniques

    International Nuclear Information System (INIS)

    The results of the application of the calorimetric technique to measure the way in which the energy of particles passed through a thin foil and stopped within a solid block is disturbed between the foil and the block are presented. This measurement gives the relative energy loss of the projectile in the foil and hence, since the foil thickness is measured independently, the stopping power. Radiation-damage measurements are discussed. In these measurements, the same cryostat as that employed in the stopping-power measurements was used. The foil was left out and the block remained as a very efficient dosimetry device. Furthermore, a number of experimental complications must be taken into account when damage is measured. Finally, results are presented of the measurement of energy distribution between two systems, this time performed at room temperature. The measurements are not nearly as accurate as those performed at low temperatures, but the physical property studied, the energy reflected from a solid surface bombarded with low-energy heavy ions (sputtering efficiency) could hardly be studied in any other way. The thesis is a summary of thirteen publications on energetic-particle calorimetry, all these papers being reproduced as appendices to the main text. (B.R.H.)

  8. RF impedance measurement calibration

    International Nuclear Information System (INIS)

    The intent of this note is not to explain all of the available calibration methods in detail. Instead, we will focus on the calibration methods of interest for RF impedance coupling measurements and attempt to explain: (1). The standards and measurements necessary for the various calibration techniques. (2). The advantages and disadvantages of each technique. (3). The mathematical manipulations that need to be applied to the measured standards and devices. (4). An outline of the steps needed for writing a calibration routine that operated from a remote computer. For further details of the various techniques presented in this note, the reader should consult the references

  9. The COS Calibration Pipeline

    Science.gov (United States)

    Hodge, Philip E.; Keyes, C.; Kaiser, M.

    2007-12-01

    The COS calibration pipeline (CALCOS) includes three main components: basic calibration, wavelength calibration, and spectral extraction. Calibration of modes using the far ultraviolet (FUV) and near ultraviolet (NUV) detectors share a common structure, although the individual reference files differ and there are some additional steps for the FUV channel. The pipeline is designed to calibrate data acquired in either ACCUM or time-tag mode. The basic calibration includes pulse-height filtering and geometric correction for FUV, and flat-field, deadtime, and Doppler correction for both detectors. Wavelength calibration can be done either by using separate lamp exposures or by taking several short lamp exposures concurrently with a science exposure. For time-tag data, the latter mode ("tagflash") will allow better correction of potential drift of the spectrum on the detector. One-dimensional spectra will be extracted and saved in a FITS binary table. Separate columns will be used for the flux-calibrated spectrum, error estimate, and the associated wavelengths. CALCOS is written in Python, with some functions in C. It is similar in style to other HST pipeline code in that it uses an association table to specify which files to be included, and the calibration steps to be performed and the reference files to use are specified by header keywords. Currently, in conjunction with the Instrument Definition Team (led by J. Green), the ground-based reference files are being refined, delivered, and tested with the pipeline.

  10. Energy calibration via correlation

    Science.gov (United States)

    Maier, Daniel; Limousin, Olivier

    2016-03-01

    The main task of an energy calibration is to find a relation between pulse-height values and the corresponding energies. Doing this for each pulse-height channel individually requires an elaborated input spectrum with an excellent counting statistics and a sophisticated data analysis. This work presents an easy to handle energy calibration process which can operate reliably on calibration measurements with low counting statistics. The method uses a parameter based model for the energy calibration and concludes on the optimal parameters of the model by finding the best correlation between the measured pulse-height spectrum and multiple synthetic pulse-height spectra which are constructed with different sets of calibration parameters. A CdTe-based semiconductor detector and the line emissions of an 241Am source were used to test the performance of the correlation method in terms of systematic calibration errors for different counting statistics. Up to energies of 60 keV systematic errors were measured to be less than ~ 0.1 keV. Energy calibration via correlation can be applied to any kind of calibration spectra and shows a robust behavior at low counting statistics. It enables a fast and accurate calibration that can be used to monitor the spectroscopic properties of a detector system in near realtime.

  11. Le bal du loup

    CERN Document Server

    Happy Children's Home

    2013-01-01

    The Bord'eau amateur theatre group will graciously perform a play of their creation Le bal du loup Saturday 19 October 2013 at 20:00 Sunday 20 October at 17:00 in the Théâtre des Grottes Rue Louis Favre 43, 1201 Genève Children from age 12 upwards. Summary: The new-elected mayoress of a small village would like to clean up the town by prohibiting alcohol and getting rid of its prostitutes. Then along comes « Massimo Lupo » the pimp... The performances will be given to support the Happy Children's Home charity, which runs a foster-home in Pokhara for Nepali children:  http://www.happychildrenshome.org/ Admission : minimum charge of 10 CHF per person requested, to cover the cost of technical assistance and theatre rental. Any profit will be used solely for the foster-home. At the end of each performance members of the HCH charity will be happy to answer any questions you may have. The theatre has 86 seats, thank you for reserv...

  12. Le collisionneur du futur?

    CERN Multimedia

    CERN Audiovisual Service

    2009-01-01

    Pourquoi deux études parallèles pour un même collisionneur linéaire ? Loin d’être un double effort et un gaspillage de ressources, ces deux études s’inscrivent dans une stratégie de complémentarité afin de fournir la meilleure technologie requise par la physique du futur. Vendredi 12 juin a eu lieu au CERN la première réunion conjointe CLIC et ILC. Elle n’a pas été avare de bons résultats et d’importantes décisions. Le Collisionneur Linéaire International (ILC) et le Collisionneur Linéaire Compact (CLIC) sont deux études qui font, tous deux, appel à des technologies de pointe. A première vue en compétition, les deux études sont en réalité complémentaires et elles ont un objectif commun : proposer dans les plus brefs délais et au moindre coût, l‘accélérateur linéaire le mieux adapté pour prendre le relais de la physique des très hautes énergies après le LHC.

  13. Effets du fluor et du phosphogypse chez les organismes marins

    OpenAIRE

    Martin, J. L.; Le Guellec, Anne-marie; Cosson, R

    1982-01-01

    Dans le cadre général des recherches visant à déterminer l'action des effluents industriels et plus précisément du fluor dans le cas de cette étude, le programme dont les résultats sont présentés avait pour but de déterminer les effets de cet élément sur les organismes marins. Trois aspects essentiels ont été envisagés : - Effets létaux du fluor ; - effets du fluor sur certaines fonctions éthologiques ; - bio-accumulation de l'élément par les organismes marins.

  14. Main: 1DU5 [RPSD[Archive

    Lifescience Database Archive (English)

    Full Text Available 1DU5 トウモロコシ Corn Zea mays L. Zeamatin Precursor. Name=Zlp; Zea Mays Molecule: Zeama...NNACPVFKKDEYCCVGSAANDCHPTNYSRYFKGQCPDAYSYPKDDATSTFTCPAGTNYKVVFCP corn_1DU5.jpg ...

  15. Photogrammetric camera calibration

    Science.gov (United States)

    Tayman, W.P.; Ziemann, H.

    1984-01-01

    Section 2 (Calibration) of the document "Recommended Procedures for Calibrating Photogrammetric Cameras and Related Optical Tests" from the International Archives of Photogrammetry, Vol. XIII, Part 4, is reviewed in the light of recent practical work, and suggestions for changes are made. These suggestions are intended as a basis for a further discussion. ?? 1984.

  16. Sandia WIPP calibration traceability

    Energy Technology Data Exchange (ETDEWEB)

    Schuhen, M.D. [Sandia National Labs., Albuquerque, NM (United States); Dean, T.A. [RE/SPEC, Inc., Albuquerque, NM (United States)

    1996-05-01

    This report summarizes the work performed to establish calibration traceability for the instrumentation used by Sandia National Laboratories at the Waste Isolation Pilot Plant (WIPP) during testing from 1980-1985. Identifying the calibration traceability is an important part of establishing a pedigree for the data and is part of the qualification of existing data. In general, the requirement states that the calibration of Measuring and Test equipment must have a valid relationship to nationally recognized standards or the basis for the calibration must be documented. Sandia recognized that just establishing calibration traceability would not necessarily mean that all QA requirements were met during the certification of test instrumentation. To address this concern, the assessment was expanded to include various activities.

  17. The GERDA calibration system

    International Nuclear Information System (INIS)

    A system with three identical custom made units is used for the energy calibration of the GERDA Ge diodes. To perform a calibration the 228Th sources are lowered from the parking positions at the top of the cryostat. Their positions are measured by two independent modules. One, the incremental encoder, counts the holes in the perforated steel band holding the sources, the other measures the drive shaft's angular position even if not powered. The system can be controlled remotely by a Labview program. The calibration data is analyzed by an iterative calibration algorithm determining the calibration functions for different energy reconstruction algorithms and the resolution of several peaks in the 228Th spectrum is determined. A Monte Carlo simulation using the GERDA simulation software MAGE has been performed to determine the background induced by the sources in the parking positions.

  18. Sandia WIPP calibration traceability

    International Nuclear Information System (INIS)

    This report summarizes the work performed to establish calibration traceability for the instrumentation used by Sandia National Laboratories at the Waste Isolation Pilot Plant (WIPP) during testing from 1980-1985. Identifying the calibration traceability is an important part of establishing a pedigree for the data and is part of the qualification of existing data. In general, the requirement states that the calibration of Measuring and Test equipment must have a valid relationship to nationally recognized standards or the basis for the calibration must be documented. Sandia recognized that just establishing calibration traceability would not necessarily mean that all QA requirements were met during the certification of test instrumentation. To address this concern, the assessment was expanded to include various activities

  19. L'administration du travail et la production du droit du travail (1906-1960). : Note de synthèse du rapport de recherche

    OpenAIRE

    Le Crom, Jean-Pierre

    2007-01-01

    Synthèse d'un rapport de recherche dont l'objectif est d'appréhender le rôle de l'administration centrale du travail dans la production du droit du travail. Deux dimensions sont explorées : le profil des rédacteurs et l'organisation des structures.

  20. An IR and Calorimetric Investigation of the Structural, Crystal-Chemical and Thermodynamic Properties of Hydrogrossular

    Science.gov (United States)

    Geiger, C. A.; Dachs, E.

    2012-04-01

    their collective interactions measurably affect the lattice dynamic (i.e. thermodynamic) behavior. The low temperature heat capacity behavior was investigated with a commercially designed relaxation calorimeter between 5 and 300 K on a mg-sized sample. The heat capacity data are well behaved at T < 300 K and show a monotonic decrease in magnitude with decreasing temperature. A standard third-law entropy value of So = 421.7 ± 1.6 J/mol·K was calculated. Using this new calorimetric-based So value and published standard enthalpy of formation data for katoite, a calorimetric-based Gibbs free energy of formation at 298 K can be obtained as ΔG°f = -5021.2 kJ/mol. The Cp data show no evidence for any phase transition as possibly expected by the change in OH-mode behavior with decreasing temperature. We have no explanation for the appearance of the additional modes. It is worth noting that the katoite crystal structure in terms of lattice dynamic or thermodynamic behavior should be thought of having OH groups and not O4H4 clusters or polyhedral units as is often written in the literature. The single crystallographic OH group in katoite shows very weak, if any, hydrogen bonding and the H atoms have large amplitudes of vibration. The weak H bonding controls the nature of low energy OH-related vibrations and this leads to its large So value.

  1. Charles Masson, Droit du sol

    OpenAIRE

    Harzoune, Mustapha

    2013-01-01

    À Mayotte, collectivité d’outre-mer en passe de devenir le 101e département français en 2011, le droit commun français a vocation à s’appliquer. Pour autant, en matière d’entrée et de séjour des étrangers, de droit du travail et de protection sociale, tel n’est pas encore le cas. François Baroin en septembre 2005 et Christian Estrosi en février 2007 voulaient étendre cette exception au droit du sol en privant les étrangers nés à Mayotte du droit de devenir français. Il faut dire qu’il y aurai...

  2. Bronze (Âge du)

    OpenAIRE

    Camps, G.

    2012-01-01

    En un siècle et demi de recherche archéologique, l’Afrique du Nord a livré moins d’une trentaine d’armes ou d’instruments en cuivre ou en bronze qui soit parvenue à la connaissance des spécialistes. Comment expliquer cette carence ? La rareté des objets métalliques attribuables au Chalcolithique ou à l’Âge du bronze demeure l’un des problèmes non résolus de la Protohistoire maghrébine. Armes de cuivre ou de bronze 1. Hache de l’oued Akrech ; 2. Hache en cuivre du Kef el Baroud ; 3. Hache en ...

  3. Traitement automatique du langage naturel

    OpenAIRE

    BADREDDINE, I

    2011-01-01

    Cette étude s'intéresse particulièrement aux exigences de sécurité et à une méthode d'extraction des exigences. Pour cette extraction, nous nous sommes penchés sur le traitement automatique du langage naturel. Une discipline, à la frontière de la linguistique, de l'informatique et de l'intelligence artificielle, qui concerne l'application de programme informatique à tous les aspects du langage humain (écrit et/ou parlé). Le but de l'étude du TALN est d'explorer les méthodes et de connaître la...

  4. Calorimetric measurements of the energetics of Pb adsorption and adhesion to Mo(100)

    International Nuclear Information System (INIS)

    The heat of adsorption of Pb on Mo(100) at 300 K has been measured calorimetrically using a single-crystal adsorption calorimeter and a pulsed atomic beam of Pb vapor. The heat of adsorption decreases with coverage in the first monolayer as (q0-q1θ-q2θ2), where q0=335.4kJ/mol, q1=65.0kJ/mol, and q2=69.8kJ/mol, indicating a heat of adsorption for an isolated Pb adatom of 335.4 kJ/mol, but with a repulsive interaction between two Pb adatoms centered in nearest-neighbor sites of 27.9 kJ/mol, and a relaxation of this repulsion of 11.6 kJ/mol by an isolated pair if unperturbed by third neighbors (that would otherwise prevent the adatoms from moving slightly off site-center to achieve this relaxation). In the second monolayer, the adsorption heat is nearly constant at ∼192.7kJ/mol, close to the enthalpy of sublimation of Pb. It decreases at ∼2ML by ∼7kJ/mol, which can be attributed to the conversion from layer-by-layer to three-dimensional island growth at ∼2ML. The initial islands are tiny and therefore adsorbing Pb atoms more weakly (bonding to fewer nearest neighbors). This is supported by Auger electron spectroscopy measurements. As the islands grow in size and their surfaces get flatter, the number of neighbors increases until the heat of adsorption above ∼6ML reaches a steady value of 191.5 kJ/mol, within 2% of the reported enthalpy of sublimation of Pb at 300 K (195.2 kJ/mol). copyright 1997 The American Physical Society

  5. Matched calorimetric loads for high power, long pulse millimeter-wave gyrotrons

    International Nuclear Information System (INIS)

    A compact matched load for high power gyrotron testing in ECRH plants for fusion research applications is in development, with the main goal of providing reflection-free absorption and fast calorimetric measurement of the millimeter-wave power, also at long pulse duration. It is based on the results of the tests at full power and pulse length (140 GHz, 0.5 MW, 0.5 s) on similar loads installed on the ECRH plant of the FTU Tokamak in Frascati. Basically, the load is made of an integrating sphere in copper, with the inner wall covered by plasma spray with a mixture of lossy ceramics, providing an average wall reflectivity in the order of 40%. Absorbing material degradation, small-scale and large-scale damage patterns, caused by fatigue and long-term exposure to high power mm-wave, have been analyzed in detail, with the aim of improving the performances in terms of power handling capability and energy extraction efficiency. Physical-chemical analyses, performed on the original and on the degraded absorbing material, showed the effects of the mm-wave exposure. Damage patterns were recognized as interference of multiple reflections inside the load, with radiation accumulation close to the entrance port, as confirmed by a detailed numerical analysis. Increase in power and energy deposition capabilities require improvements of the present design in different areas: - strategies for the mitigation of the different causes of non-homogeneous deposition; - use of different plasma-sprayed materials as mm-wave absorbers; - improved cooling channel geometry with increased heat transfer rate to the cooling medium, for achieving 1 MW-CW power capability. (authors)

  6. Experimental study of the heat of combustion of electrical cables: Pitcairn/calorimetre test bench

    International Nuclear Information System (INIS)

    The R and D has been developing for about ten years, through the MAGIC software, a modeling program on the propagation of fire in power plants. The potential fuels in a power plant are mainly limited to the oils existing in engines and control systems, and electric cables. Those cables present a complex combustion due to their fire-resistant design. In order to study that combustion, two test benches, the PITCAIRN oven and the CALORIMETRE EDF/CNRS have been linked. This report presents briefly the experimental installation, then it comments on the first experimental data obtained with two types of samples, a PVC and an EPR-Hypalon cable. The tested cables are selected from those commonly used in French Nuclear Power Plants. They present complex components (fire-retarding chemical agents, mechanical reinforcement). The data show that the behavior of those cables cannot be reduced to a mass loss rate associated to a constant Heat of Combustion. The Heat of Combustion of the PVC cable tested varies little at the beginning of the pyrolysis from 5 kJ.g-1 to 10 kJ.g-1, then increases quickly up to 30 kJ.g-1. In the same way, the EPR-Hypalon cable shows a continuous and slow increase of the Heat of Combustion from 1 kJ.g-1 to 20 kJ.g-1 during the pyrolysis, then rises quickly up to 40 kJ.g-1 at the end. Those data corroborate the thesis of the dilution of flammable species by fire-retarding agents, which lower the Heat of combustion but seems to disappear at the end of the pyrolysis. (authors). 7 refs., 6 figs

  7. Calorimetric measurement of afterheat in target materials for the accelerator production of tritium

    International Nuclear Information System (INIS)

    The estimate of afterheat in a spallation target of lead (Pb) or tungsten (W), by calorimetry, is the purpose of this experiment in support of the Accelerator Production of Tritium (APT). Such measurements are needed to confirm code calculations, these being the only practical way of gaining this type of information in a form suitable to aid the design of the APT machine. Knowledge of the magnitude and duration of afterheat resulting from decay of activation products produced by proton bombardment of the target is necessary to quantify APT safety assumptions, to design target cooling and safety systems, and to reduce technical risk. Direct calorimetric measurement of the afterheat for the appropriate incident proton energies is more reliable than the available alternative, which is indirect, based on data from gamma-ray spectroscopy measurements. The basic concept, a direct measurement of decay afterheat which bypasses the laborious classical way of determining this quantity, has been demonstrated to work. The gamma-ray energy given off by the decay products produced in the activation of lead or tungsten with high-energy protons apparently does represent a significant fraction of the total decay energy. A calorimeter designed for measurement of isotopes decaying by alpha emission must be modified to reduce energy lost with escaping gamma rays. Replacement of the aluminum liner with a tungsten liner in the SSC measurement chamber resulted in a 270% increase in measured heat, proving that the energy loss in the earlier (1992) measurements was significant. Gamma-ray measurements are needed to confirm the gamma-ray absorption calculations for the calorimeter to determine the correction for loss of heat due to transmission of high-energy gamma rays through the calorimeter walls. The experiments at BLIP have shown that calorimetry can be a useful tool in measuring the afterheat in APT target materials

  8. Les avatars du cheval iakoute

    OpenAIRE

    Ferret, Carole

    2010-01-01

    Confrontant pratiques et représentations, l'article tente de démêler le vrai du faux parmi les discours tenus sur le cheval iakoute, un animal extraordinaire, jugé plus méritant que bien d’autres espèces (mammouth, porc, mouton, chameau, renne et vache) dans les domaines les plus variés, et qui fait l'objet d'un élevage original, dans les confins septentrionaux du monde turcique.

  9. Des usages du constructivisme (2)

    OpenAIRE

    Fleury-Vilatte, Béatrice; Walter, Jacques

    2013-01-01

    Dans cette deuxième série d’articles consacrés au constructivisme, Bernard Delforce, Isabelle Gavillet et Nicolas Pélissier prolongent la discussion menée par Roger Bautier, Denis Benoit et Roselyne Koren sur les usages de la notion par des chercheurs travaillant dans le domaine du journalisme, quitte à s’interroger sur les effets d’une telle centration. Si l’approche historique et le recours aux sciences de l’information et de la communication (SIC) et aux sciences du langage nourrissaient l...

  10. Dužnost umiranja

    OpenAIRE

    Czerny Urban, Milica; Baccarini, Elvio

    2010-01-01

    U suvremenim raspravama o eutanaziji i liječnički potpomognutom samoubojstvu, te odustajanju od tretmana, osim uobičajenih razloga koji se temelje na slobodi i izbjegavanju patnje osobe koja traži ubrzavanje smrti, postoji i teza o dužnosti umiranja. S obzirom na to da je pojedinac ujedno i član zajednice, odnosno da ima obitelj i voljene, nužno je raspraviti o slučajevima kada bolest izaziva značajne teškoće za život njegovih bližnjih. Smatramo kako i pacijentova pravedna prosudba o dužnosti...

  11. Remote calibration of ionization chambers for radioactivity calibration

    International Nuclear Information System (INIS)

    A new calibration technique, referred to as e-trace, has been developed by the National Institute of Advanced Industrial Science and Technology (AIST). The e-trace technique enables rapid remote calibration of measurement equipment and requires minimal resources. We calibrated radioisotope calibrators of the Japan Radioisotope Association (JRIA) and the Nishina Memorial Cyclotron Center (NMCC) remotely and confirmed that remote calibration provided results that are consistent with the results obtained by existing methods within the limits of uncertainty. Accordingly, e-trace has been approved as the standard calibration method at AIST. We intend to apply remote calibration to radioisotope calibrators in hospitals and isotope facilities. (author)

  12. Réflexion sur l’origine du processus de segmentation du marche du travail

    Directory of Open Access Journals (Sweden)

    Attia Nicole

    2006-01-01

    Full Text Available (francuski Ce travail propose une réflexion sur l'origine du processus de segmentation du marché du travail par rapport à l'entreprise. Se situe-t-elle au sein même de l'entreprise ou en amont, c'est à dire entre les entreprises? Cela revient à se demander si on peut avoir une approche microéconomique ou macroéconomique de la segmentation et, à s'interroger sur le rôle réel tenu par les firmes dans le processus. Déterminant pour la théorie, ce rôle est à repenser selon la réponse apportée à notre question.

  13. Calibrations of photomultiplier tubes

    International Nuclear Information System (INIS)

    The experimental methods for calibration photomultiplier tubes used in the multichannel fast-pulse-detection system of Thomson scattering measurements for nuclear fusion devices is reported. The most important parameters of the photomultiplier tubes to be calibrated include: linearity of output electric signals to input light signals, response time of pulsed light, spectral response, absolute responsibility, and sensitivity as a function of the chain voltage. The calibrations of all these parameters are carried out by using EMI 9558 B and RCA 7265 photomultiplier tubes respectively. The experimental methods presented in the paper are common to those quantitative measurements that require phomultiplier tubes as detectors

  14. Equipment for dosemeter calibration

    International Nuclear Information System (INIS)

    The device is used for precise calibration of dosimetric instrumentation, such as used at nuclear facilities. The high precision of the calibration procedure is primarily due to the fact that one single and steady radiation source is used. The accurate alignment of the source and the absence of shielding materials in the beam axis make for high homogeneity of the beam and reproducibility of the measurement; this is also contributed to by the horizontal displacement of the optical bench, which ensures a constant temperature field and the possibility of adjusting the radiation source at a sufficient distance from the instrument to be calibrated. (Z.S.). 3 figs

  15. Lidar Calibration Centre

    Science.gov (United States)

    Pappalardo, Gelsomina; Freudenthaler, Volker; Nicolae, Doina; Mona, Lucia; Belegante, Livio; D'Amico, Giuseppe

    2016-06-01

    This paper presents the newly established Lidar Calibration Centre, a distributed infrastructure in Europe, whose goal is to offer services for complete characterization and calibration of lidars and ceilometers. Mobile reference lidars, laboratories for testing and characterization of optics and electronics, facilities for inspection and debugging of instruments, as well as for training in good practices are open to users from the scientific community, operational services and private sector. The Lidar Calibration Centre offers support for trans-national access through the EC HORIZON2020 project ACTRIS-2.

  16. Etude de la mesure du paramètre alpha dans le cadre de la violation de la symétrie CP à l'aide du canal $B_{d}^{0} \\to \\pi^{+} \\pi^{-}\\pi^{0}$ dans l'expérience LHCb

    CERN Document Server

    Robert, Arnaud

    2005-01-01

    L'analyse temporelle du correlogramme de Dalitz du canal a trois corps Bd en pi+ pi- pi0 conduit a l'extraction de l'un des parametres definissant la violation de la symetrie CP dans le Modele Standard Electrofaible, l'angle alpha, exempte d'ambiguites discretes entre 0 et pi. Elle permet, entre autres, d'acceder independamment aux valeurs des principaux parametres QCD regissant la desintegration. La contrepartie experimentale repose cependant sur une statistique de signal suffisamment pure et importante et une maitrise precise de la phenomenologie associee. Combines a un rapport d'embranchement de l'ordre de 2.10^{-5}, ces deux arguments justifient a eux seuls le caractere non trivial d'une telle analyse dans l'environnement hadronique de l'experience dediee LHCb. A partir de la reponse simulee du detecteur, et en particulier des performances du calorimetre electromagnetique, cette these montre l'interet essentiel de la reconstruction specifique des pions neutres tres energiques et la necessite d'introduire ...

  17. Reflexion sur lorigine du processus de segmentation du marche du travail

    OpenAIRE

    Nicole Attia

    2006-01-01

    Ce travail propose une rf006cexion sur lorigine du processus de segmentation du march 0064u travail par rapport 006centreprise. Se situetelle au sein mm0065 de lentreprise ou en amont, cest 0064ire entre les entreprises ? Cela revient 0073e demander si on peut avoir une approche microc006fnomique ou macroc006fnomique de la segmentation et, 0073interroger sur le rl00650020re006c tenu par les firmes dans le processus. Dt0065rminant pour la tho0072ie, ce rl00650020est 0072epenser selon la rp006f...

  18. Calorimetric study of hydrogen reaction with LaNi3.85cU1.07

    International Nuclear Information System (INIS)

    Calorimetric study of interaction of LaNi3.85Cu1.07 intermetallic compound with hydrogen in the 298-403 K temperature range is pursued. Differential absorption (desorption) enthalpies with the composition 0 3.85Cu1.07, and integral enthalpies ofl hydrogen absorption by intermetallic compound to the LaNi3.85Cu1.07H6.2 composition in the 298-383 K temperature range. It is shown that in the platean area the process of hydrogen desorption (absorption) has a complex character and runs in two stages, and each stage is followed by hydrogen separation (absorption)

  19. SPOTS Calibration Example

    Directory of Open Access Journals (Sweden)

    Patterson E.

    2010-06-01

    Full Text Available The results are presented using the procedure outlined by the Standardisation Project for Optical Techniques of Strain measurement to calibrate a digital image correlation system. The process involves comparing the experimental data obtained with the optical measurement system to the theoretical values for a specially designed specimen. The standard states the criteria which must be met in order to achieve successful calibration, in addition to quantifying the measurement uncertainty in the system. The system was evaluated at three different displacement load levels, generating strain ranges from 289 µstrain to 2110 µstrain. At the 289 µstrain range, the calibration uncertainty was found to be 14.1 µstrain, and at the 2110 µstrain range it was found to be 28.9 µstrain. This calibration procedure was performed without painting a speckle pattern on the surface of the metal. Instead, the specimen surface was prepared using different grades of grit paper to produce the desired texture.

  20. Traceable Pyrgeometer Calibrations

    Energy Technology Data Exchange (ETDEWEB)

    Dooraghi, Mike; Kutchenreiter, Mark; Reda, Ibrahim; Habte, Aron; Sengupta, Manajit; Andreas, Afshin; Newman, Martina; Webb, Craig

    2016-05-02

    This presentation provides a high-level overview of the progress on the Broadband Outdoor Radiometer Calibrations for all shortwave and longwave radiometers that are deployed by the Atmospheric Radiation Measurement program.

  1. Air Data Calibration Facility

    Data.gov (United States)

    Federal Laboratory Consortium — This facility is for low altitude subsonic altimeter system calibrations of air vehicles. Mission is a direct support of the AFFTC mission. Postflight data merge is...

  2. Rupture sous-cutanée du tendon long extenseur du pouce: à propos de 5 cas

    OpenAIRE

    Abdelillah, Rachid; Abbassi, Najib; Erraji, Moncef; Abdeljawad, Najib; Yacoubi, Hicham; Daoudi, Abdelkrim

    2014-01-01

    La rupture spontanée du muscle long extenseur du pouce (EPL) du tendon au niveau du poignet est rare et principalement rapportés après fracture du radius distal à tubercule de Lister, dans la synovite, ténosynovite ou la polyarthrite rhumatoïde. Nous rapportons 5 cas de rupture spontanée du tendon long extenseur du pouce, traités par une greffe ou un transfert tendineux.

  3. Approximation Behooves Calibration

    DEFF Research Database (Denmark)

    da Silva Ribeiro, André Manuel; Poulsen, Rolf

    2013-01-01

    Calibration based on an expansion approximation for option prices in the Heston stochastic volatility model gives stable, accurate, and fast results for S&P500-index option data over the period 2005–2009.......Calibration based on an expansion approximation for option prices in the Heston stochastic volatility model gives stable, accurate, and fast results for S&P500-index option data over the period 2005–2009....

  4. Scanner calibration revisited

    Directory of Open Access Journals (Sweden)

    Pozhitkov Alexander E

    2010-07-01

    Full Text Available Abstract Background Calibration of a microarray scanner is critical for accurate interpretation of microarray results. Shi et al. (BMC Bioinformatics, 2005, 6, Art. No. S11 Suppl. 2. reported usage of a Full Moon BioSystems slide for calibration. Inspired by the Shi et al. work, we have calibrated microarray scanners in our previous research. We were puzzled however, that most of the signal intensities from a biological sample fell below the sensitivity threshold level determined by the calibration slide. This conundrum led us to re-investigate the quality of calibration provided by the Full Moon BioSystems slide as well as the accuracy of the analysis performed by Shi et al. Methods Signal intensities were recorded on three different microarray scanners at various photomultiplier gain levels using the same calibration slide from Full Moon BioSystems. Data analysis was conducted on raw signal intensities without normalization or transformation of any kind. Weighted least-squares method was used to fit the data. Results We found that initial analysis performed by Shi et al. did not take into account autofluorescence of the Full Moon BioSystems slide, which led to a grossly distorted microarray scanner response. Our analysis revealed that a power-law function, which is explicitly accounting for the slide autofluorescence, perfectly described a relationship between signal intensities and fluorophore quantities. Conclusions Microarray scanners respond in a much less distorted fashion than was reported by Shi et al. Full Moon BioSystems calibration slides are inadequate for performing calibration. We recommend against using these slides.

  5. Calibrating nacelle lidars

    Energy Technology Data Exchange (ETDEWEB)

    Courtney, M.

    2013-01-15

    Nacelle mounted, forward looking wind lidars are beginning to be used to provide reference wind speed measurements for the power performance testing of wind turbines. In such applications, a formal calibration procedure with a corresponding uncertainty assessment will be necessary. This report presents four concepts for performing such a nacelle lidar calibration. Of the four methods, two are found to be immediately relevant and are pursued in some detail. The first of these is a line of sight calibration method in which both lines of sight (for a two beam lidar) are individually calibrated by accurately aligning the beam to pass close to a reference wind speed sensor. A testing procedure is presented, reporting requirements outlined and the uncertainty of the method analysed. It is seen that the main limitation of the line of sight calibration method is the time required to obtain a representative distribution of radial wind speeds. An alternative method is to place the nacelle lidar on the ground and incline the beams upwards to bisect a mast equipped with reference instrumentation at a known height and range. This method will be easier and faster to implement and execute but the beam inclination introduces extra uncertainties. A procedure for conducting such a calibration is presented and initial indications of the uncertainties given. A discussion of the merits and weaknesses of the two methods is given together with some proposals for the next important steps to be taken in this work. (Author)

  6. Energy calibration via correlation

    CERN Document Server

    Maier, Daniel

    2015-01-01

    The main task of an energy calibration is to find a relation between pulse-height values and the corresponding energies. Doing this for each pulse-height channel individually requires an elaborated input spectrum with an excellent counting statistics and a sophisticated data analysis. This work presents an easy to handle energy calibration process which can operate reliably on calibration measurements with low counting statistics. The method uses a parameter based model for the energy calibration and concludes on the optimal parameters of the model by finding the best correlation between the measured pulse-height spectrum and multiple synthetic pulse-height spectra which are constructed with different sets of calibration parameters. A CdTe-based semiconductor detector and the line emissions of an 241 Am source were used to test the performance of the correlation method in terms of systematic calibration errors for different counting statistics. Up to energies of 60 keV systematic errors were measured to be le...

  7. Comment penser l’Asie du Milieu et l’Asie du Centre ?

    OpenAIRE

    Gorshenina, Svetlana

    2009-01-01

    Cette étude porte sur la reconstitution du processus relatif à la formation du concept russo-soviétique de l’Asie du milieu et de l’Asie du centre et à la querelle terminologique de l'époque post-soviétique, derrière lesquels se cachent l'explosion du système soviétique, le retour du concept de Mackinder relatif à “l'aire pivot” et les préoccupations géopolitiques des nouveaux États asiatiques indépendants au sud de la Russie.

  8. Advances in high power calorimetric matched loads for short pulses and CW gyrotrons

    International Nuclear Information System (INIS)

    The development of high power gyrotrons for plasma physics research needs properly matched calorimetric loads able to absorb and measure the power, which nowadays is foreseen to be as high as 2 MW during CW operations. To this end IFP/CNR has developed a family of matched loads useful in the mm-wave frequency band for applications ranging from a few ms to CW in pulse length. The different loads in the family, made of an integrating sphere with a partially reflecting coating on the inner wall, are characterized by having the same absorbing geometry for the incoming beam and a different heat removal system for the specific application. Some important advances have been recently achieved from the point of view of the uniformity of power distribution on the absorbing wall and of the load construction. With the high precision achieved in the coating thickness a better control of the heating power distribution is possible by proper shaping of the local reflectivity, in addition to the shaping of the mirror dispersing the input beam. A more sophisticated model describing the power distribution has been developed, taking into account a variable thickness of the absorbing coating, the proper shape of the spreading mirror, the frequency of the incoming radiation and the shape of the input beam. Lower coating thickness is shown to be preferable, for a given local reflectivity, from the point of view of a lower peak temperature and thermal stress. The paper describes a load with variable coating thickness along the meridian of the sphere, showing a uniform power deposition on the inner walls. The cooling pipe is completely electroformed on the spherical copper shell, ensuring the maintenance of the correct curvature of the inner surface and fast heat conduction from the absorbing coating to the water through the thin copper body. For CW use all heated parts of the load must be cooled and this is achieved with 16 electroformed spiral channels. Both short pulse loads (0.1-1 s

  9. Advances in High Power Calorimetric Matched Loads for Short Pulses and CW Gyrotrons

    International Nuclear Information System (INIS)

    The development of high power gyrotrons for plasma physics research needs proper matched and calorimetric loads able to absorb and measure the power, which nowadays is foreseen to be as high as 2 MW during CW operations. To this end IFP/CNR has developed a family of matched loads useful in the mm-wave frequency band for applications ranging from a few ms to CW in pulse length. The different loads in the family, made of an integrating sphere with a partially reflecting coating on the inner wall, are characterized by having the same absorbing geometry for the incoming beam and a different heat removal system for the specific application. Some important advances have been recently achieved from the point of view of the uniformity of power distribution on the absorbing wall and of the load construction. With high precision achieved in the coating thickness a better control of the heating power distribution is possible by proper shaping of the local reflectivity, in addition to the shaping of the mirror dispersing the input beam. A more sophisticated model describing the power distribution has been developed, taking into account a variable thickness of the absorbing coating, the proper shape of the spreading mirror, the frequency of the incoming radiation and the shape of the input beam. Lower coating thickness is shown to be preferable, at equal local reflectivity, from the point of view of a lower peak temperature and thermal stress. The paper describes a load with variable coating thickness along the meridian of the sphere, showing a uniform power deposition on the inner walls. The cooling pipe is completely electroformed on the spherical copper shell, ensuring the maintenance of the correct curvature of the inner surface and a fast heat conduction from the absorbing coating to the water through the thin copper body. For CW use all heated parts of the load must be cooled and this is achieved by 16 electroformed spiral channels. Both short pulse loads (0.1-1 s) and

  10. LES GITES PLOMBO-ZINCIFERES DU DISTRICT MINIER DU KOUDIAT SIDU AUSUD DU KEF EN TUNISIE

    Directory of Open Access Journals (Sweden)

    Ivan Jurković

    1992-12-01

    Full Text Available Les auteurs ont dćcrit l:i stratigiaphie. I.i tectonique, le corps de minerals, la paragenese et la genese dcs gttes Koudiat Sidri situ&s environ 20 km au sud de la ville du Kef en Tunisie.

  11. Le parcours migratoire de jeunes ruraux du bled du kif

    Directory of Open Access Journals (Sweden)

    Khalid Mouna

    2015-06-01

    Full Text Available Cet article analyse le parcours migratoire des jeunes ruraux originaires des zones de production du cannabis, jeunes qui cherchent à briser les chaînes de soumission et d’humiliation vécues au quotidien. Pour les jeunes concernés par notre étude, la migration constitue un moyen de s’intégrer dans des réseaux transnationaux et ainsi d’entamer une carrière de beznass (commerçant du cannabis. Ce parcours « initiatique » permet à ces jeunes de revenir au bled avec de nouvelles idées, des moyens accrus, et de jouer un rôle actif dans l’économie locale – qui reste pour eux focalisée sur la production de cannabis, cette dernière restant néanmoins officiellement interdite.

  12. Calibration and Characterization of the Small Sample Calorimeter

    Energy Technology Data Exchange (ETDEWEB)

    Santi, Peter A. [Los Alamos National Laboratory; Perry, Katherine A. [Los Alamos National Laboratory

    2012-08-13

    An early component of the Joint Fuel Cycle Study (JFCS) between the United States and the Republic of Korea is a test of gram scale electrochemical recycling of spent fuel which is to be performed at Idaho National Laboratory (INL). Included in this test is the development of Nondestructive Assay (NDA) technologies that would be applicable for International Atomic Energy Agency (IAEA) safeguards of the electrochemical recycling process. Of upmost importance to safeguarding the fuel cycle associated with the electrochemical recycling process is the ability to safeguard the U/TRU ingots that will be produced in the process. For the gram scale test, the ingots that will be produced will have an expected thermal power of approximately 130 mW. To ascertain how well the calorimetric assay NDA technique can perform in assaying these ingots, Los Alamos National Laboratory (LANL) has characterized and calibrated a small solid-state calorimeter called the Small Sample Calorimeter (SSC3) to perform these measurements at LANL. To calibrate and characterize the SSC3, a series of measurements were performed using certified {sup 238}Pu heat standards whose power output is traceable back to the National Institute of Standards and Technology (NIST) electrical standards. The results of these measurements helped establish both the calibration of the calorimeter as well as the expected performance of the calorimeter in terms of its accuracy and precision as a function of thermal power of the item that is being measured. In this report, we will describe the measurements that were performed and provide a discussion of the results of these measurements.

  13. Development, calibration, and experimental results obtained with an innovative calorimeter (CALMOS) for nuclear heating measurements

    International Nuclear Information System (INIS)

    Nuclear heating inside an MTR reactor has to be known in order to be able to control samples temperature during irradiation experiments. An R and D program has been carried out at CEA to design a new type of in-core calorimetric system. This new development, started in 2002, has for main objective to manufacture a calorimeter suitable to monitoring nuclear heating inside the 70 MWth OSIRIS material testing reactor operated by CEA's Nuclear Energy Division at the Saclay research center. An innovative calorimetric probe, associated to a specific handling system, has been designed to provide access to measurements both along the fissile height and on the upper part of the core, where nuclear heating still remains high. Two mock-ups of the probe were manufactured and tested in 2005 and 2009 in ex-core area of OSIRIS reactor for process validation, while a displacement system has been especially studied to move the probe along a given axial measurement range. This paper deals with the development, tests on preliminary mock-ups and the finalization of the probe. Main modeling and experimental results are presented. Moreover, alternative methods to calibration for nuclear heating rate measurements which are now possible with this new calorimeter are presented and discussed. (authors)

  14. Development, calibration and experimental results obtained with an innovative calorimeter (CALMOS) for nuclear heating measurements

    International Nuclear Information System (INIS)

    Nuclear heating inside an MTR reactor has to be known in order to be able to control samples temperature during irradiation experiments. An R and D program has been carried out at CEA to design a new type of in-core calorimetric system. This new development, started in 2002, has for main objective to manufacture a calorimeter suitable to monitoring nuclear heating inside the 70 MWth OSIRIS material testing reactor operated by CEA's Nuclear Energy Div. at the Saclay research center. An innovative calorimetric probe, associated to a specific handling system, has been designed to provide access to measurements both along the fissile height and on the upper part of the core, where nuclear heating still remains high. Two mock-ups of the probe were manufactured and tested in 2005 and 2009 in ex-core area of OSIRIS reactor for process validation, while a displacement system has been especially studied to move the probe along a given axial measurement range. This paper deals with the development, tests on preliminary mock-ups and the finalization of the probe. Main modeling and experimental results are presented. Moreover, alternative methods to calibration for nuclear heating rate measurements which are now possible with this new calorimeter are presented and discussed. (authors)

  15. HAWC Timing Calibration

    CERN Document Server

    Huentemeyer, Petra; Dingus, Brenda

    2009-01-01

    The High-Altitude Water Cherenkov (HAWC) Experiment is a second-generation highsensitivity gamma-ray and cosmic-ray detector that builds on the experience and technology of the Milagro observatory. Like Milagro, HAWC utilizes the water Cherenkov technique to measure extensive air showers. Instead of a pond filled with water (as in Milagro) an array of closely packed water tanks is used. The event direction will be reconstructed using the times when the PMTs in each tank are triggered. Therefore, the timing calibration will be crucial for reaching an angular resolution as low as 0.25 degrees.We propose to use a laser calibration system, patterned after the calibration system in Milagro. Like Milagro, the HAWC optical calibration system will use ~1 ns laser light pulses. Unlike Milagro, the PMTs are optically isolated and require their own optical fiber calibration. For HAWC the laser light pulses will be directed through a series of optical fan-outs and fibers to illuminate the PMTs in approximately one half o...

  16. Calibration Under Uncertainty.

    Energy Technology Data Exchange (ETDEWEB)

    Swiler, Laura Painton; Trucano, Timothy Guy

    2005-03-01

    This report is a white paper summarizing the literature and different approaches to the problem of calibrating computer model parameters in the face of model uncertainty. Model calibration is often formulated as finding the parameters that minimize the squared difference between the model-computed data (the predicted data) and the actual experimental data. This approach does not allow for explicit treatment of uncertainty or error in the model itself: the model is considered the %22true%22 deterministic representation of reality. While this approach does have utility, it is far from an accurate mathematical treatment of the true model calibration problem in which both the computed data and experimental data have error bars. This year, we examined methods to perform calibration accounting for the error in both the computer model and the data, as well as improving our understanding of its meaning for model predictability. We call this approach Calibration under Uncertainty (CUU). This talk presents our current thinking on CUU. We outline some current approaches in the literature, and discuss the Bayesian approach to CUU in detail.

  17. GTC Photometric Calibration

    Science.gov (United States)

    di Cesare, M. A.; Hammersley, P. L.; Rodriguez Espinosa, J. M.

    2006-06-01

    We are currently developing the calibration programme for GTC using techniques similar to the ones use for the space telescope calibration (Hammersley et al. 1998, A&AS, 128, 207; Cohen et al. 1999, AJ, 117, 1864). We are planning to produce a catalogue with calibration stars which are suitable for a 10-m telescope. These sources will be not variable, non binary and do not have infrared excesses if they are to be used in the infrared. The GTC science instruments require photometric calibration between 0.35 and 2.5 microns. The instruments are: OSIRIS (Optical System for Imaging low Resolution Integrated Spectroscopy), ELMER and EMIR (Espectrógrafo Multiobjeto Infrarrojo) and the Acquisition and Guiding boxes (Di Césare, Hammersley, & Rodriguez Espinosa 2005, RevMexAA Ser. Conf., 24, 231). The catalogue will consist of 30 star fields distributed in all of North Hemisphere. We will use fields containing sources over the range 12 to 22 magnitude, and spanning a wide range of spectral types (A to M) for the visible and near infrared. In the poster we will show the method used for selecting these fields and we will present the analysis of the data on the first calibration fields observed.

  18. Compte rendu du colloque : « Anthropologie du Maroc et du Maghreb »

    OpenAIRE

    Planeix, Ariel

    2015-01-01

    Du 8 au 10 septembre 2013 a eu lieu, à Essaouira (Maroc), le colloque « Anthropologie du Maroc et du Maghreb », troisième du genre après ceux de Tanger en 2003 et de Fès en 2007, organisé par le Centre Jacques Berque (CGB) sous l’impulsion de Baudouin Dupret, son directeur, et de Cédric Baylocq, alors postdoctorant et depuis enseignant à l’université Mundiapolis de Casablanca. L’ambition, derrière un tel intitulé, fut de convier une part représentative des travaux contemporains sur le Maroc e...

  19. Le paradigme du don face aux nouvelles réalités du monde du travail

    OpenAIRE

    Caillé, Alain

    2012-01-01

    Alain Caillé resitue le paradigme du don que le Mouvement anti-utilitariste en sciences sociales (MAUSS) s’emploie à dégager depuis une trentaine d’années avant de montrer comment les lunettes du don permettent de mieux voir ce qu’il y a dans la boîte noire des organisations et de mieux lire par là même les ravages du néomanagement. À cette contribution répond celle de Norbert Alter dans le cadre du dossier Chorus « Peut-on penser le travail par le don ? »

  20. Calibrating nacelle lidars

    DEFF Research Database (Denmark)

    Courtney, Michael

    Nacelle mounted, forward looking wind lidars are beginning to be used to provide reference wind speed measurements for the power performance testing of wind turbines. In such applications, a formal calibration procedure with a corresponding uncertainty assessment will be necessary. This report...... accurately aligning the beam to pass close to a reference wind speed sensor. A testing procedure is presented, reporting requirements outlined and the uncertainty of the method analysed. It is seen that the main limitation of the line of sight calibration method is the time required to obtain a...... inclination introduces extra uncertainties. A procedure for conducting such a calibration is presented and initial indications of the uncertainties given. A discussion of the merits and weaknesses of the two methods is given together with some proposals for the next important steps to be taken in this work....

  1. TARGETLESS CAMERA CALIBRATION

    Directory of Open Access Journals (Sweden)

    L. Barazzetti

    2012-09-01

    Full Text Available In photogrammetry a camera is considered calibrated if its interior orientation parameters are known. These encompass the principal distance, the principal point position and some Additional Parameters used to model possible systematic errors. The current state of the art for automated camera calibration relies on the use of coded targets to accurately determine the image correspondences. This paper presents a new methodology for the efficient and rigorous photogrammetric calibration of digital cameras which does not require any longer the use of targets. A set of images depicting a scene with a good texture are sufficient for the extraction of natural corresponding image points. These are automatically matched with feature-based approaches and robust estimation techniques. The successive photogrammetric bundle adjustment retrieves the unknown camera parameters and their theoretical accuracies. Examples, considerations and comparisons with real data and different case studies are illustrated to show the potentialities of the proposed methodology.

  2. Analyse du discours et archive

    OpenAIRE

    Maingueneau, Dominique

    2007-01-01

    Les recherches qui se réclament de "l’analyse du discours" connaissent un développement considérable dans le monde entier ; en revanche, "l’école française d’analyse du discours" (AD) traverse une crise d’identité depuis le début des années 80. Dans cet exposé nous voudrions explorer les raisons de cette crise, puis préciser le concept d’archive qui, à notre sens, permet de prolonger la voie ouverte à la fin des années 1960. Mais il ne s’agit que d’une des voies possibles, dès lors que, comme...

  3. Les souvenirs du passeur solitaire

    Directory of Open Access Journals (Sweden)

    Jean Marie Théodat

    2009-07-01

    Full Text Available Passée la grille qui sépare la cour de plain-pied avec le trottoir dallé de frais, on pourrait se croire dans la cour de l’église, sur le seuil du presbytère, sur le point de rendre visite au curé, tant l’atmosphère recluse de ce refuge contraste avec l’animation brouillonne du quartier. D’une façon presque rituelle, je sens le poids de la pierre en passant sous le linteau voûté qui donne sur l’escalier étroit. Je néglige l’ascenseur et me glisse dans ce colimaçon de pierre et de chêne, les m...

  4. L’Harmonie du monde

    Directory of Open Access Journals (Sweden)

    Martine Clouzot

    2003-11-01

    Full Text Available La Bourgogne est particulièrement bien présente et représentée dans l’exposition sur la musique et ses représentations au Moyen Âge organisée par Isabelle Marchesin (université de Poitiers, Christine Laloue (conservatrice du Patrimoine au Musée et Martine Clouzot (université de Bourgogne, au Musée de la Musique à Paris du 26 mars au 27 juin 2004. En Côte-d’Or, à Dijon, la Bibliothèque municipale a donné son accord officiel pour le prêt de la Bible d’Etienne Harding, les Moralia in Job et u...

  5. The MINOS calibration detector

    International Nuclear Information System (INIS)

    This paper describes the MINOS calibration detector (CalDet) and the procedure used to calibrate it. The CalDet, a scaled-down but functionally equivalent model of the MINOS Far and Near detectors, was exposed to test beams in the CERN PS East Area during 2001-2003 to establish the response of the MINOS calorimeters to hadrons, electrons and muons in the range 0.2-10GeV/c. The CalDet measurements are used to fix the energy scale and constrain Monte Carlo simulations of MINOS

  6. Individual dosimetry and calibration

    International Nuclear Information System (INIS)

    In 1995 both the Individual Dosimetry and Calibration Sections worked under the condition of a status quo and concentrated fully on the routine part of their work. Nevertheless, the machine for printing the bar code which will be glued onto the film holder and hence identify the people when entering into high radiation areas was put into operation and most of the holders were equipped with the new identification. As far as the Calibration Section is concerned the project of the new source control system that is realized by the Technical Support Section was somewhat accelerated

  7. L'energie du moustique

    CERN Document Server

    Augereau, J F

    2002-01-01

    ENSEMBLE DE QUATRE ARTICLES - LARGE HADRON COLLIDER: Le dernier accelerateur de particules du CERN, le LEP, produisait des faisceaux d'electrons de 100 GeV chacun. Le LHC, qui accelere des faisceaux de protons, leur communiquera une energie de 7 TeV chacun. Une energie a la fois colossale et derisoire. Un TeV represente a peu pres l'energie cinetique d'un moustique (1/2 page).

  8. La reproduction du chinchilla (Chinchilla lanigera)

    OpenAIRE

    Stein, Frédérique

    2002-01-01

    Ce travail s'attache aux diverses particularités de la reproduction du chin- chilla (Chinchilla lanigera). La reproduction est définie comme tout ce qui a trait à la production du nouveau-né. Sont ainsi abordés: la physiologie de la reproduction mâle-femelle (anatomie, fonctionnement hormonal), la saillie, la fécondation, la gestation (développement de l'embryon puis du foetus, développement des annexes embryonnaires comme le placenta), la parturition, ainsi que le développement du jeune jusq...

  9. Etude du perçage et du soudage laser : dynamique du capillaire

    OpenAIRE

    Mostafa, Massaud

    2011-01-01

    L’objectif de ce travail est d'étudier expérimentalement la formation du capillaire durant le perçage et le soudage par faisceau laser, et de développer une simulation numérique permettant de reproduire la dynamique de formation et d'évolution du capillaire. Nous avons fait le choix d’utiliser comme matériau test le Zinc, en raison de ses propriétés thermodynamiques. Afin de simplifier le problème, nous avons étudié dans un premier temps le mécanisme de perçage. Deux méthodes expérimentales o...

  10. Calibration of farmer dosemeters

    International Nuclear Information System (INIS)

    The Farmer Dosemeters of Atomic Energy Medical Centre (AEMC) Jamshoro were calibrated in the Secondary Standard Dosimetry Laboratory (SSDL) at PINSTECH, using the NPL Secondary Standard Therapy level X-ray exposure meter. The results are presented in this report. (authors)

  11. Calibration Of Oxygen Monitors

    Science.gov (United States)

    Zalenski, M. A.; Rowe, E. L.; Mcphee, J. R.

    1988-01-01

    Readings corrected for temperature, pressure, and humidity of air. Program for handheld computer developed to ensure accuracy of oxygen monitors in National Transonic Facility, where liquid nitrogen stored. Calibration values, determined daily, based on entries of data on barometric pressure, temperature, and relative humidity. Output provided directly in millivolts.

  12. Commodity-Free Calibration

    Science.gov (United States)

    2008-01-01

    Commodity-free calibration is a reaction rate calibration technique that does not require the addition of any commodities. This technique is a specific form of the reaction rate technique, where all of the necessary reactants, other than the sample being analyzed, are either inherent in the analyzing system or specifically added or provided to the system for a reason other than calibration. After introduction, the component of interest is exposed to other reactants or flow paths already present in the system. The instrument detector records one of the following to determine the rate of reaction: the increase in the response of the reaction product, a decrease in the signal of the analyte response, or a decrease in the signal from the inherent reactant. With this data, the initial concentration of the analyte is calculated. This type of system can analyze and calibrate simultaneously, reduce the risk of false positives and exposure to toxic vapors, and improve accuracy. Moreover, having an excess of the reactant already present in the system eliminates the need to add commodities, which further reduces cost, logistic problems, and potential contamination. Also, the calculations involved can be simplified by comparison to those of the reaction rate technique. We conducted tests with hypergols as an initial investigation into the feasiblility of the technique.

  13. Calibration bench of flowmeters

    International Nuclear Information System (INIS)

    This equipment is devoted to the comparison of signals from two turbines installed in the Cabri experimental loop. The signal is compared to the standard turbine. The characteristics and the performance of the calibration bench are presented. (A.L.B.)

  14. Measurement System & Calibration report

    DEFF Research Database (Denmark)

    Vesth, Allan; Kock, Carsten Weber

    This Measurement System & Calibration report is describing DTU’s measurement system installed at a specific wind turbine. A major part of the sensors has been installed by others (see [1]) the rest of the sensors have been installed by DTU. The results of the measurements, described in this report...

  15. Calibration with Absolute Shrinkage

    DEFF Research Database (Denmark)

    Øjelund, Henrik; Madsen, Henrik; Thyregod, Poul

    2001-01-01

    In this paper, penalized regression using the L-1 norm on the estimated parameters is proposed for chemometric je calibration. The algorithm is of the lasso type, introduced by Tibshirani in 1996 as a linear regression method with bound on the absolute length of the parameters, but a modification...

  16. Calibration issues for MUSE

    Science.gov (United States)

    Kelz, Andreas; Roth, Martin; Bauer, Svend; Gerssen, Joris; Hahn, Thomas; Weilbacher, Peter; Laux, Uwe; Loupias, Magali; Kosmalski, Johan; McDermid, Richard; Bacon, Roland

    2008-07-01

    The Multi-Unit Spectroscopic Explorer (MUSE) is an integral-field spectrograph for the VLT for the next decade. Using an innovative field-splitting and slicing design, combined with an assembly of 24 spectrographs, MUSE will provide some 90,000 spectra in one exposure, which cover a simultaneous spectral range from 465 to 930nm. The design and manufacture of the Calibration Unit, the alignment tests of the Spectrograph and Detector sub-systems, and the development of the Data Reduction Software for MUSE are work-packages under the responsibility of the AIP, who is a partner in a European-wide consortium of 6 institutes and ESO, that is led by the Centre de Recherche Astronomique de Lyon. MUSE will be operated and therefore has to be calibrated in a variety of modes, which include seeing-limited and AO-assisted operations, providing a wide and narrow-field-of-view. MUSE aims to obtain unprecedented ultra-deep 3D-spectroscopic exposures, involving integration times of the order of 80 hours at the VLT. To achieve the corresponding science goals, instrumental stability, accurate calibration and adequate data reduction tools are needed. The paper describes the status at PDR of the AIP related work-packages, in particular with respect to the spatial, spectral, image quality, and geometrical calibration and related data reduction aspects.

  17. Entropic calibration revisited

    Energy Technology Data Exchange (ETDEWEB)

    Brody, Dorje C. [Blackett Laboratory, Imperial College, London SW7 2BZ (United Kingdom)]. E-mail: d.brody@imperial.ac.uk; Buckley, Ian R.C. [Centre for Quantitative Finance, Imperial College, London SW7 2AZ (United Kingdom); Constantinou, Irene C. [Blackett Laboratory, Imperial College, London SW7 2BZ (United Kingdom); Meister, Bernhard K. [Blackett Laboratory, Imperial College, London SW7 2BZ (United Kingdom)

    2005-04-11

    The entropic calibration of the risk-neutral density function is effective in recovering the strike dependence of options, but encounters difficulties in determining the relevant greeks. By use of put-call reversal we apply the entropic method to the time reversed economy, which allows us to obtain the spot price dependence of options and the relevant greeks.

  18. Physiotherapy ultrasound calibrations

    International Nuclear Information System (INIS)

    Calibration of physiotherapy ultrasound equipment has long been a problem. Numerous surveys around the world over the past 20 years have all found that only a low percentage of the units tested had an output within 30% of that indicatd. In New Zealand, a survey carried out by the NRL in 1985 found that only 24% had an output, at the maximum setting, within + or - 20% of that indicated. The present performance Standard for new equipment (NZS 3200.2.5:1992) requires that the measured output should not deviate from that indicated by more than + or - 30 %. This may be tightened to + or - 20% in the next few years. Any calibration is only as good as the calibration equipment. Some force balances can be tested with small weights to simulate the force exerted by an ultrasound beam, but with others this is not possible. For such balances, testing may only be feasible with a calibrated source which could be used like a transfer standard. (author). 4 refs., 3 figs

  19. NVLAP calibration laboratory program

    Energy Technology Data Exchange (ETDEWEB)

    Cigler, J.L.

    1993-12-31

    This paper presents an overview of the progress up to April 1993 in the development of the Calibration Laboratories Accreditation Program within the framework of the National Voluntary Laboratory Accreditation Program (NVLAP) at the National Institute of Standards and Technology (NIST).

  20. LOFAR Facet Calibration

    Science.gov (United States)

    van Weeren, R. J.; Williams, W. L.; Hardcastle, M. J.; Shimwell, T. W.; Rafferty, D. A.; Sabater, J.; Heald, G.; Sridhar, S. S.; Dijkema, T. J.; Brunetti, G.; Brüggen, M.; Andrade-Santos, F.; Ogrean, G. A.; Röttgering, H. J. A.; Dawson, W. A.; Forman, W. R.; de Gasperin, F.; Jones, C.; Miley, G. K.; Rudnick, L.; Sarazin, C. L.; Bonafede, A.; Best, P. N.; Bîrzan, L.; Cassano, R.; Chyży, K. T.; Croston, J. H.; Ensslin, T.; Ferrari, C.; Hoeft, M.; Horellou, C.; Jarvis, M. J.; Kraft, R. P.; Mevius, M.; Intema, H. T.; Murray, S. S.; Orrú, E.; Pizzo, R.; Simionescu, A.; Stroe, A.; van der Tol, S.; White, G. J.

    2016-03-01

    LOFAR, the Low-Frequency Array, is a powerful new radio telescope operating between 10 and 240 MHz. LOFAR allows detailed sensitive high-resolution studies of the low-frequency radio sky. At the same time LOFAR also provides excellent short baseline coverage to map diffuse extended emission. However, producing high-quality deep images is challenging due to the presence of direction-dependent calibration errors, caused by imperfect knowledge of the station beam shapes and the ionosphere. Furthermore, the large data volume and presence of station clock errors present additional difficulties. In this paper we present a new calibration scheme, which we name facet calibration, to obtain deep high-resolution LOFAR High Band Antenna images using the Dutch part of the array. This scheme solves and corrects the direction-dependent errors in a number of facets that cover the observed field of view. Facet calibration provides close to thermal noise limited images for a typical 8 hr observing run at ∼ 5\\prime\\prime resolution, meeting the specifications of the LOFAR Tier-1 northern survey.

  1. Radiation monitor calibration technique

    International Nuclear Information System (INIS)

    Reference radiations in the Secondary Standard Dosimetry Laboratory, OAEP have been improved and modified by employing lead attenuators. To identify low-level exposure rate, shadow-cone method has been applied. The secondary standard dosemeter has been used periodically to check the constancy of reference radiations to assure the calibration of dosemeters and dose-ratemeters used for radiation protection

  2. LOFAR facet calibration

    CERN Document Server

    van Weeren, R J; Hardcastle, M J; Shimwell, T W; Rafferty, D A; Sabater, J; Heald, G; Sridhar, S S; Dijkema, T J; Brunetti, G; Brüggen, M; Andrade-Santos, F; Ogrean, G A; Röttgering, H J A; Dawson, W A; Forman, W R; de Gasperin, F; Jones, C; Miley, G K; Rudnick, L; Sarazin, C L; Bonafede, A; Best, P N; Bîrzan, L; Cassano, R; Chyży, K T; Croston, J H; Ensslin, T; Ferrari, C; Hoeft, M; Horellou, C; Jarvis, M J; Kraft, R P; Mevius, M; Intema, H T; Murray, S S; Orrú, E; Pizzo, R; Simionescu, A; Stroe, A; van der Tol, S; White, G J

    2016-01-01

    LOFAR, the Low-Frequency Array, is a powerful new radio telescope operating between 10 and 240 MHz. LOFAR allows detailed sensitive high-resolution studies of the low-frequency radio sky. At the same time LOFAR also provides excellent short baseline coverage to map diffuse extended emission. However, producing high-quality deep images is challenging due to the presence of direction dependent calibration errors, caused by imperfect knowledge of the station beam shapes and the ionosphere. Furthermore, the large data volume and presence of station clock errors present additional difficulties. In this paper we present a new calibration scheme, which we name facet calibration, to obtain deep high-resolution LOFAR High Band Antenna images using the Dutch part of the array. This scheme solves and corrects the direction dependent errors in a number of facets that cover the observed field of view. Facet calibration provides close to thermal noise limited images for a typical 8 hr observing run at $\\sim$ 5arcsec resolu...

  3. Pseudo Linear Gyro Calibration

    Science.gov (United States)

    Harman, Richard; Bar-Itzhack, Itzhack Y.

    2003-01-01

    Previous high fidelity onboard attitude algorithms estimated only the spacecraft attitude and gyro bias. The desire to promote spacecraft and ground autonomy and improvements in onboard computing power has spurred development of more sophisticated calibration algorithms. Namely, there is a desire to provide for sensor calibration through calibration parameter estimation onboard the spacecraft as well as autonomous estimation on the ground. Gyro calibration is a particularly challenging area of research. There are a variety of gyro devices available for any prospective mission ranging from inexpensive low fidelity gyros with potentially unstable scale factors to much more expensive extremely stable high fidelity units. Much research has been devoted to designing dedicated estimators such as particular Extended Kalman Filter (EKF) algorithms or Square Root Information Filters. This paper builds upon previous attitude, rate, and specialized gyro parameter estimation work performed with Pseudo Linear Kalman Filter (PSELIKA). The PSELIKA advantage is the use of the standard linear Kalman Filter algorithm. A PSELIKA algorithm for an orthogonal gyro set which includes estimates of attitude, rate, gyro misalignments, gyro scale factors, and gyro bias is developed and tested using simulated and flight data. The measurements PSELIKA uses include gyro and quaternion tracker data.

  4. Au fil du temps (1976 ou la loi du seuil

    Directory of Open Access Journals (Sweden)

    Isabelle Singer

    2010-04-01

    Full Text Available Ayant choisi de vivre dans un camion, les héros d’Au fil du temps (film de Wim Wenders de 1976 font du seuil une expérience particulière. Celle de la rupture avec toute idée de foyer et celle du refus d’appartenance à la terre natale, cette terre allemande traversée par une frontière le long de laquelle ils vont voyager, et qui les renvoie à chaque instant aux traumatismes de l’Histoire. Sur le pare-brise du camion, l’extérieur (campagnes indifférenciées, villes à l’abandon… et l’intérieur se superposent. Au fil du temps questionne le paysage : il s’agit d’en décoller un à un les mythes qui le recouvrent. L’image alors n’est plus surface mais volume à traverser, à lacérer et découvrir ce qui est tissé dans le paysage. La démarche de Wenders est alors proche de celle d’un de ses contemporains : Anselm Kiefer. Le paysage allemand provoque le rejet parce qu’il y a là toujours plus que le visible : des strates et des strates de culpabilité que le mythe - et c’est sa fonction - a recouvert. Et qu’il s’agira ici, de soulever. Le choix du nomadisme, c’est celui d’un état de l’humanité antérieur à l’idée de patrie. Et c’est aussi celui de la solitude, comme prix à payer à ce refus d’appartenance et à cette mise à jour des mythes. L’appartenance à la terre allemande et à son Histoire est profondément problématique parce que les pères sont fondamentalement coupables. On se reconnaîtra alors des pères de substitution : des pères de cinéma (Nicholas Ray ou Fritz Lang. Et l’on substituera l’Histoire du cinéma à l’Histoire. Bruno est réparateur ambulant de projecteurs et Au fil du temps dressera, au gré de ses pérégrinations, un état des lieux du cinéma allemand des années soixante-dix : déliquescent, colonisé par les images hollywoodiennes. Il faut que cela change : état du cinéma ; état des protagonistes solitaires en quête d’une identit

  5. Pleiades Absolute Calibration : Inflight Calibration Sites and Methodology

    Science.gov (United States)

    Lachérade, S.; Fourest, S.; Gamet, P.; Lebègue, L.

    2012-07-01

    In-flight calibration of space sensors once in orbit is a decisive step to be able to fulfil the mission objectives. This article presents the methods of the in-flight absolute calibration processed during the commissioning phase. Four In-flight calibration methods are used: absolute calibration, cross-calibration with reference sensors such as PARASOL or MERIS, multi-temporal monitoring and inter-bands calibration. These algorithms are based on acquisitions over natural targets such as African deserts, Antarctic sites, La Crau (Automatic calibration station) and Oceans (Calibration over molecular scattering) or also new extra-terrestrial sites such as the Moon and selected stars. After an overview of the instrument and a description of the calibration sites, it is pointed out how each method is able to address one or several aspects of the calibration. We focus on how these methods complete each other in their operational use, and how they help building a coherent set of information that addresses all aspects of in-orbit calibration. Finally, we present the perspectives that the high level of agility of PLEIADES offers for the improvement of its calibration and a better characterization of the calibration sites.

  6. Mercury CEM Calibration

    Energy Technology Data Exchange (ETDEWEB)

    John F. Schabron; Joseph F. Rovani; Susan S. Sorini

    2007-03-31

    The Clean Air Mercury Rule (CAMR) which was published in the Federal Register on May 18, 2005, requires that calibration of mercury continuous emissions monitors (CEMs) be performed with NIST-traceable standards. Western Research Institute (WRI) is working closely with the Electric Power Research Institute (EPRI), the National Institute of Standards and Technology (NIST), and the Environmental Protection Agency (EPA) to facilitate the development of the experimental criteria for a NIST traceability protocol for dynamic elemental mercury vapor generators. The traceability protocol will be written by EPA. Traceability will be based on the actual analysis of the output of each calibration unit at several concentration levels ranging from about 2-40 ug/m{sup 3}, and this analysis will be directly traceable to analyses by NIST using isotope dilution inductively coupled plasma/mass spectrometry (ID ICP/MS) through a chain of analyses linking the calibration unit in the power plant to the NIST ID ICP/MS. Prior to this project, NIST did not provide a recommended mercury vapor pressure equation or list mercury vapor pressure in its vapor pressure database. The NIST Physical and Chemical Properties Division in Boulder, Colorado was subcontracted under this project to study the issue in detail and to recommend a mercury vapor pressure equation that the vendors of mercury vapor pressure calibration units can use to calculate the elemental mercury vapor concentration in an equilibrium chamber at a particular temperature. As part of this study, a preliminary evaluation of calibration units from five vendors was made. The work was performed by NIST in Gaithersburg, MD and Joe Rovani from WRI who traveled to NIST as a Visiting Scientist.

  7. Calibrated Properties Model

    International Nuclear Information System (INIS)

    The purpose of this Model Report is to document the Calibrated Properties Model that provides calibrated parameter sets for unsaturated zone (UZ) flow and transport process models for the Office of Repository Development (ORD). The UZ contains the unsaturated rock layers overlying the repository and host unit, which constitute a natural barrier to flow, and the unsaturated rock layers below the repository which constitute a natural barrier to flow and transport. This work followed, and was planned in, ''Technical Work Plan (TWP) for: Performance Assessment Unsaturated Zone'' (BSC 2002 [160819], Section 1.10.8 [under Work Package (WP) AUZM06, Climate Infiltration and Flow], and Section I-1-1 [in Attachment I, Model Validation Plans]). In Section 4.2, four acceptance criteria (ACs) are identified for acceptance of this Model Report; only one of these (Section 4.2.1.3.6.3, AC 3) was identified in the TWP (BSC 2002 [160819], Table 3-1). These calibrated property sets include matrix and fracture parameters for the UZ Flow and Transport Model (UZ Model), drift seepage models, and drift-scale and mountain-scale coupled-process models from the UZ Flow, Transport and Coupled Processes Department in the Natural Systems Subproject of the Performance Assessment (PA) Project. The Calibrated Properties Model output will also be used by the Engineered Barrier System Department in the Engineering Systems Subproject. The Calibrated Properties Model provides input through the UZ Model and other process models of natural and engineered systems to the Total System Performance Assessment (TSPA) models, in accord with the PA Strategy and Scope in the PA Project of the Bechtel SAIC Company, LLC (BSC). The UZ process models provide the necessary framework to test conceptual hypotheses of flow and transport at different scales and predict flow and transport behavior under a variety of climatic and thermal-loading conditions. UZ flow is a TSPA model component

  8. Utilisation de l'Extrait Enzymatique des Fleurs du Cynara cardunculus pour la Fabrication du Fromage

    OpenAIRE

    BENSAID, ilhem

    2015-01-01

    La préparation du fromage traditionnelle connue sous le nom de « Djeben », par coagulation du lait à l'aide d'extraits des fleurs du cardon constitue une technologie originale spécifique de certaines régions Algériennes. Notre étude s'inscrit dans le cadre de la préservation du patrimoine culinaire du pays afin de combler le manque de données scientifiques sur cette coagulation. En effet, les tests préliminaires effectués sur la fleur de la plante, indiquent une activité coa...

  9. Une approche comparative de la question de l'effectivité du droit du travail

    OpenAIRE

    Auvergnon, Philippe

    2006-01-01

    La question de l'effectivité du droit du travail n'est pas nouvelle. Toutefois, une approche comparative, à partir de différents systèmes juridiques et de relations professionnelles, permet utilement de la revisiter. Qu'entend-on par effectivité du droit ? Ne confond-on pas aujourd'hui souvent effectivité et efficacité ? Le droit du travail est-il particulièrement exposé à l'ineffectivité du fait des rapports de pouvoir prévalant dans les relations de travail subordonné ? L'analyse des effect...

  10. Field calibration of cup anemometers

    DEFF Research Database (Denmark)

    Schmidt Paulsen, Uwe; Mortensen, Niels Gylling; Hansen, Jens Carsten;

    2007-01-01

    A field calibration method and results are described along with the experience gained with the method. The cup anemometers to be calibrated are mounted in a row on a 10-m high rig and calibrated in the free wind against a reference cup anemometer. The method has been reported [1] to improve the...... statistical bias on the data relative to calibrations carried out in a wind tunnel. The methodology is sufficiently accurate for calibration of cup anemometers used for wind resource assessments and provides a simple, reliable and cost-effective solution to cup anemometer calibration, especially suited for...

  11. Investigation of peak shapes in the MIBETA experiment calibrations

    CERN Document Server

    Ferri, E; Monfardini, A; Nucciotti, A; Schaeffer, D; Sisti, M; 10.1140/epja/i2012-12131-5

    2012-01-01

    In calorimetric neutrino mass experiments, where the shape of a beta decay spectrum has to be precisely measured, the understanding of the detector response function is a fundamental issue. In the MIBETA neutrino mass experiment, the X-ray lines measured with external sources did not have Gaussian shapes, but exhibited a pronounced shoulder towards lower energies. If this shoulder were a general feature of the detector response function, it would distort the beta decay spectrum and thus mimic a non-zero neutrino mass. An investigation was performed to understand the origin of the shoulder and its potential influence on the beta spectrum. First, the peaks were fitted with an analytic function in order to determine quantitatively the amount of events contributing to the shoulder, also depending on the energy of the calibration X-rays. In a second step, Montecarlo simulations were performed to reproduce the experimental spectrum and to understand the origin of its shape. We conclude that at least part of the obs...

  12. Estudio de las interacciones OHÏ€ por espectroscopia infrarroja y calorimetría de solución

    Directory of Open Access Journals (Sweden)

    Nelly Rodríguez C.

    2009-06-01

    Full Text Available Se estudiaron las interacciones moleculares del tipo OH . . . Ï€ existentes entre algunos fenoles y el benceno, usando como solvente tetracloruro de carbono a 25°C, mediante calorimetría de solución y espectroscopia infrarroja. Las entalpias de formación de los complejos, calculadas por métodos calorimétricos en base a las ecuaciones de Bolles-Drago y de Lamberts-Zeegers-Huyskens y de acuerdo a los datos de constantes de equilibrio obtenidos por el método infrarrojo, resultaron ser del orden de —1 a —2 kcal/mol, valores que las sitúan entre las uniones más débiles.

  13. Mercury Calibration System

    Energy Technology Data Exchange (ETDEWEB)

    John Schabron; Eric Kalberer; Joseph Rovani; Mark Sanderson; Ryan Boysen; William Schuster

    2009-03-11

    U.S. Environmental Protection Agency (EPA) Performance Specification 12 in the Clean Air Mercury Rule (CAMR) states that a mercury CEM must be calibrated with National Institute for Standards and Technology (NIST)-traceable standards. In early 2009, a NIST traceable standard for elemental mercury CEM calibration still does not exist. Despite the vacature of CAMR by a Federal appeals court in early 2008, a NIST traceable standard is still needed for whatever regulation is implemented in the future. Thermo Fisher is a major vendor providing complete integrated mercury continuous emissions monitoring (CEM) systems to the industry. WRI is participating with EPA, EPRI, NIST, and Thermo Fisher towards the development of the criteria that will be used in the traceability protocols to be issued by EPA. An initial draft of an elemental mercury calibration traceability protocol was distributed for comment to the participating research groups and vendors on a limited basis in early May 2007. In August 2007, EPA issued an interim traceability protocol for elemental mercury calibrators. Various working drafts of the new interim traceability protocols were distributed in late 2008 and early 2009 to participants in the Mercury Standards Working Committee project. The protocols include sections on qualification and certification. The qualification section describes in general terms tests that must be conducted by the calibrator vendors to demonstrate that their calibration equipment meets the minimum requirements to be established by EPA for use in CAMR monitoring. Variables to be examined include linearity, ambient temperature, back pressure, ambient pressure, line voltage, and effects of shipping. None of the procedures were described in detail in the draft interim documents; however they describe what EPA would like to eventually develop. WRI is providing the data and results to EPA for use in developing revised experimental procedures and realistic acceptance criteria based on

  14. Qualification procedure of the electromagnetic calorimeter of the ATLAS detector; Conception et mise au point de la procedure de qualification du calorimetre electromagnetique a argon liquide du detecteur ATLAS

    Energy Technology Data Exchange (ETDEWEB)

    Massol, N

    2000-04-19

    LHC is the next collider based at CERN in Europe. The purpose of this machine is the Higgs boson and SUSY particles search. The detectors must have an excellent electromagnetic calorimetry to measure electron and photon energy. To maximize the signal to noise ratio for a low mass Higgs, it is fundamental to obtain a constant term as small as possible. LAPP is participating in the construction of the liquid argon electromagnetic calorimeter of the ATLAS collaboration. This technology is well adapted to the LHC experimental conditions. A systematic procedure to qualify the modules of this detector is an essential step to guarantee a 0,7% constant term, which is the collaboration objective. The procedure detailed in this thesis consists of quality monitoring during mechanical assembly and of a set of electrical tests such as electrical continuity, cell and cross-talk capacitance measurement, and high-voltage behaviour. For the whole test, it has been necessary to develop dedicated electronic cards, to develop measurement methods, and the whole operation software. Making the procedure automatic will guarantee the quality of each module during assembly, cabling, and test in liquid argon. (author)

  15. Har du rådne kunder?

    DEFF Research Database (Denmark)

    Grünbaum, Niels Nolsøe

    2015-01-01

    Tætte kunderelationer er ikke altid guld værd. Har du modet til at skille dig af med kunder, som ødelægger din forretning?......Tætte kunderelationer er ikke altid guld værd. Har du modet til at skille dig af med kunder, som ødelægger din forretning?...

  16. Des Taiwanais dans Ie sud du Fujian

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    Se trouvant dans le sud-est de la Chine au bord dela mer, la province du Fujian s’appelle aussi toutsimplement "Min". Les anc(?)tres d’une grande partie de lapopulation de Taiwan sont venus du Fujian (Min). Les deux

  17. Streak camera time calibration procedures

    Science.gov (United States)

    Long, J.; Jackson, I.

    1978-01-01

    Time calibration procedures for streak cameras utilizing a modulated laser beam are described. The time calibration determines a writing rate accuracy of 0.15% with a rotating mirror camera and 0.3% with an image converter camera.

  18. The Calibration Reference Data System

    Science.gov (United States)

    Greenfield, P.; Miller, T.

    2016-07-01

    We describe a software architecture and implementation for using rules to determine which calibration files are appropriate for calibrating a given observation. This new system, the Calibration Reference Data System (CRDS), replaces what had been previously used for the Hubble Space Telescope (HST) calibration pipelines, the Calibration Database System (CDBS). CRDS will be used for the James Webb Space Telescope (JWST) calibration pipelines, and is currently being used for HST calibration pipelines. CRDS can be easily generalized for use in similar applications that need a rules-based system for selecting the appropriate item for a given dataset; we give some examples of such generalizations that will likely be used for JWST. The core functionality of the Calibration Reference Data System is available under an Open Source license. CRDS is briefly contrasted with a sampling of other similar systems used at other observatories.

  19. Acquisition of rheological and calorimetric properties of borosilicate glass to determine the free energy of formation

    International Nuclear Information System (INIS)

    calorimetric and rheological properties. (authors)

  20. Optical tweezers absolute calibration

    CERN Document Server

    Dutra, R S; Neto, P A Maia; Nussenzveig, H M

    2014-01-01

    Optical tweezers are highly versatile laser traps for neutral microparticles, with fundamental applications in physics and in single molecule cell biology. Force measurements are performed by converting the stiffness response to displacement of trapped transparent microspheres, employed as force transducers. Usually, calibration is indirect, by comparison with fluid drag forces. This can lead to discrepancies by sizable factors. Progress achieved in a program aiming at absolute calibration, conducted over the past fifteen years, is briefly reviewed. Here we overcome its last major obstacle, a theoretical overestimation of the peak stiffness, within the most employed range for applications, and we perform experimental validation. The discrepancy is traced to the effect of primary aberrations of the optical system, which are now included in the theory. All required experimental parameters are readily accessible. Astigmatism, the dominant effect, is measured by analyzing reflected images of the focused laser spo...

  1. Jacques Lacan : le stade du miroir

    OpenAIRE

    Roudinesco, Élisabeth

    2014-01-01

    La genèse de la notion de stade du miroir permet de comprendre comment fonctionne chez Lacan le pouvoir de l’archive effacée. Pourquoi parler à propos du stade du miroir d’une archive effacée ? La réponse est à la fois simple et complexe. Il n’existe pas de version originale de la conférence prononcée sur ce thème lors du XIVe congrès de l’IPA de Marienbad en 1936 (du 2 au 8 août). Après avoir parlé pendant environ quinze minutes, Lacan fut interrompu par Ernest Jones qui trouvait que ce conf...

  2. Astrid-2 SSC ASUMagnetic Calibration

    DEFF Research Database (Denmark)

    Primdahl, Fritz

    1997-01-01

    Report of the inter calibration between the starcamera and the fluxgate magnetometer onboard the ASTRID-2 satellite. This calibration was performed in the night between the 15. and 16. May 1997 at the Lovö magnetic observatory.......Report of the inter calibration between the starcamera and the fluxgate magnetometer onboard the ASTRID-2 satellite. This calibration was performed in the night between the 15. and 16. May 1997 at the Lovö magnetic observatory....

  3. Optical Calibration of SNO+

    Science.gov (United States)

    Maneira, J.; Peeters, S.; Sinclair, J.

    2015-04-01

    SNO is being upgraded to SNO+, which has as its main goal the search for neutrinoless double-beta decay. The upgrade is defined by filling with a novel scintillator mixture containing 130Te. With a lower energy threshold than SNO, SNO+ will be sensitive to other exciting new physics. Here we are describing new optical calibration system that meets new, more stringent radiopurity requirements has been developed.

  4. Camera Calibration Using Silhouettes

    OpenAIRE

    Boyer, Edmond

    2005-01-01

    This report addresses the problem of estimating camera parameters from images where object silhouettes only are known. Several modeling applications make use of silhouettes, and while calibration methods are well known when considering points or lines matched along image sequences, the problem appears to be more difficult when considering silhouettes. However, such primitives encode also information on camera parameters by the fact that their associated viewing cones should present a common i...

  5. Program Calibrates Strain Gauges

    Science.gov (United States)

    Okazaki, Gary D.

    1991-01-01

    Program dramatically reduces personnel and time requirements for acceptance tests of hardware. Data-acquisition system reads output from Wheatstone full-bridge strain-gauge circuit and calculates strain by use of shunt calibration technique. Program nearly instantaneously tabulates and plots strain data against load-cell outputs. Modified to acquire strain data for other specimens wherever full-bridge strain-gauge circuits used. Written in HP BASIC.

  6. Calibration specimens for microscopy

    Czech Academy of Sciences Publication Activity Database

    Kolařík, Vladimír; Matějka, Milan; Matějka, František; Krátký, Stanislav; Urbánek, Michal; Horáček, Miroslav; Král, Stanislav; Bok, Jan

    Ostrava: TANGER Ltd, 2012, s. 713-716. ISBN 978-80-87294-32-1. [NANOCON 2012. International Conference /4./. Brno (CZ), 23.10.2012-25.10.2012] R&D Projects: GA MŠk ED0017/01/01; GA TA ČR TE01020233; GA MPO FR-TI1/576 Institutional support: RVO:68081731 Keywords : E-beam technology * calibration specimen * scanning electron microscopy Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering

  7. Calibrating bacterial evolution

    OpenAIRE

    Ochman, Howard; Elwyn, Susannah; Moran, Nancy A

    1999-01-01

    Attempts to calibrate bacterial evolution have relied on the assumption that rates of molecular sequence divergence in bacteria are similar to those of higher eukaryotes, or to those of the few bacterial taxa for which ancestors can be reliably dated from ecological or geological evidence. Despite similarities in the substitution rates estimated for some lineages, comparisons of the relative rates of evolution at different classes of nucleotide sites indicate no basis for their universal appl...

  8. Mesoscale hybrid calibration artifact

    Science.gov (United States)

    Tran, Hy D.; Claudet, Andre A.; Oliver, Andrew D.

    2010-09-07

    A mesoscale calibration artifact, also called a hybrid artifact, suitable for hybrid dimensional measurement and the method for make the artifact. The hybrid artifact has structural characteristics that make it suitable for dimensional measurement in both vision-based systems and touch-probe-based systems. The hybrid artifact employs the intersection of bulk-micromachined planes to fabricate edges that are sharp to the nanometer level and intersecting planes with crystal-lattice-defined angles.

  9. L'imaginaire du volcan

    OpenAIRE

    Bertrand, Dominique; Bosquet, Marie-Françoise; Bozzetto, Roger; Chamart, Gabrielle; Chelebourg, Christian; Chenet-Faugeras, Françoise; Collot, Michel; Cornille, Jean-Louis; Gaillard, Aurélia; Lavocat, Françoise; Frank LESTRINGANT; Racault, Jean-Michel; SHINODA, Chiwaki; Sylvos, Françoise; Tardieu, Jean-Pierre

    2016-01-01

    Quelle force naturelle pouvait, mieux que le volcan, devenir la métaphore vive de l'enthousiasme poétique ? Auteur du paysage qu'il remodèle après l'avoir détruit, sculpteur de laves autant qu'objet pittoresque, le volcan est dans la littérature un actant essentiel, un relais de l'auteur, comme le montre ce voyage dans la mémoire des représentations volcaniques.

  10. Mali. Musique bambara du Baninko

    OpenAIRE

    Zanetti, Vincent

    2011-01-01

    Dans le Mali contemporain, le groupe ethnique le plus important numériquement est celui que la littérature ethnographique a définitivement contribué à faire connaître sous le nom de «Bambara». Installés sur un vaste territoire recouvrant grosso modo le quart sud-est du pays, les Bambara, qui dans leur propre langue se désignent en fait sous le nom de bamananw (au singulier: bamanan), se distinguent les uns les autres selon leur répartition géographique, dans les trois régions suivantes: Beled...

  11. Les controverses du bien mourir

    OpenAIRE

    Clapasson, Dominique; Pott, Murielle

    2009-01-01

    Actuellement, la question des situations de fin de vie se pose en problème social. La dénonciation du tabou de la mort et de l’acharnement thérapeutique suscite des interrogations éthiques relatives à la souffrance des malades. Dès lors, le bien mourir devient une préoccupation qui touche chacun d’entre-nous. En Suisse, l’aspiration à une mort pacifiée se meut en deux modèles distincts de la gestion des situations de fin de vie : les soins palliatifs et l’assistance au suicide. En oppositi...

  12. Dosimetry and Calibration Section

    International Nuclear Information System (INIS)

    The two tasks of the Dosimetry and Calibration Section at CERN are the Individual Dosimetry Service which assures the personal monitoring of about 5000 persons potentially exposed to ionizing radiation at CERN, and the Calibration Laboratory which verifies all the instruments and monitors. This equipment is used by the sections of the RP Group for assuring radiation protection around CERN's accelerators, and by the Environmental Section of TISTE. In addition, nearly 250 electronic and 300 quartz fibre dosimeters, employed in operational dosimetry, are calibrated at least once a year. The Individual Dosimetry Service uses an extended database (INDOS) which contains information about all the individual doses ever received at CERN. For most of 1997 it was operated without the support of a database administrator as the technician who had assured this work retired. The Software Support Section of TIS-TE took over the technical responsibility of the database, but in view of the many other tasks of this Section and the lack of personnel, only a few interventions for solving immediate problems were possible

  13. Calibrated Properties Model

    International Nuclear Information System (INIS)

    The purpose of this model report is to document the calibrated properties model that provides calibrated property sets for unsaturated zone (UZ) flow and transport process models (UZ models). The calibration of the property sets is performed through inverse modeling. This work followed, and was planned in, ''Technical Work Plan (TWP) for: Unsaturated Zone Flow Analysis and Model Report Integration'' (BSC 2004 [DIRS 169654], Sections 1.2.6 and 2.1.1.6). Direct inputs to this model report were derived from the following upstream analysis and model reports: ''Analysis of Hydrologic Properties Data'' (BSC 2004 [DIRS 170038]); ''Development of Numerical Grids for UZ Flow and Transport Modeling'' (BSC 2004 [DIRS 169855]); ''Simulation of Net Infiltration for Present-Day and Potential Future Climates'' (BSC 2004 [DIRS 170007]); ''Geologic Framework Model'' (GFM2000) (BSC 2004 [DIRS 170029]). Additionally, this model report incorporates errata of the previous version and closure of the Key Technical Issue agreement TSPAI 3.26 (Section 6.2.2 and Appendix B), and it is revised for improved transparency

  14. Calibration of the cameras of the H.E.S.S. {gamma}-ray astronomy experiment and observations of the Galactic Centre above 100 GeV; Etalonnage des cameras de l'experience d'astronomie {gamma} H.E.S.S. et observations du centre galactique au-dela de 100 GeV

    Energy Technology Data Exchange (ETDEWEB)

    Rolland, L

    2005-05-15

    The H.E.S.S. experiment (High Energy Stereoscopic System) consists of four imaging atmospheric Cherenkov telescopes to study the southern astrophysical sources above 100 GeV. This thesis presents the detector as well as the analysis chain. The calibration methods are described in details and the systematic errors on the image amplitude are derived. Then, an analysis based on a semi-analytical model of the electromagnetic shower development in the atmosphere is presented. Tools to reconstruct the energy spectrum and the morphology of the very high energy {gamma}-ray sources are presented and applied to the Crab Nebula. Systematic errors associated to the spectrum analysis are estimated. All these techniques were applied to study the Galactic Centre emission above 100 GeV. The nature of the source detected in 2003 and 2004 observations is still unknown and its spectrum, variability and morphology are studied. Various candidates are proposed, among them the supermassive black hole Sgr A* located at the dynamical centre of the Milky Way, the supernova remnant Sgr A Est or interactions of accelerated particles with the dense medium of this region. In this thesis, the signal was interpreted in terms of dark matter annihilation (neutralinos or Kaluza-Klein bosons) in a dense halo located at the Galactic Centre. This analysis showed that, in the framework of these models, dark matter annihilation alone can not explain the H.E.S.S. signal. The main component would thus come from astrophysical sources. (author)

  15. Calibration effects on orbit determination

    Science.gov (United States)

    Madrid, G. A.; Winn, F. B.; Zielenbach, J. W.; Yip, K. B.

    1974-01-01

    The effects of charged particle and tropospheric calibrations on the orbit determination (OD) process are analyzed. The calibration process consisted of correcting the Doppler observables for the media effects. Calibrated and uncalibrated Doppler data sets were used to obtain OD results for past missions as well as Mariner Mars 1971. Comparisons of these Doppler reductions show the significance of the calibrations. For the MM'71 mission, the media calibrations proved themselves effective in diminishing the overall B-plane error and reducing the Doppler residual signatures.

  16. Mammography calibration: Factor or fit?

    International Nuclear Information System (INIS)

    Dose measurements in mammography x-ray have become more important and a basic path in quality assurance programmes. It is recognized by the international guidelines that it is necessary to have calibration services offered for mammography beams in order to help the improvement of the clinical diagnosis. Major efforts have been made by several laboratories in order to establish an appropriate and traceable calibration infrastructure and to provide the basis for a quality control programme in mammography. The indication of a dosimeter, whose reference point is positioned at the point of test, is compared with the conventional true value of the quantity to be measured. The calibration coefficient is then the ratio of the conventional true value to the indicated. The Primary Standard Dosimetry Laboratory - PSDL or the Secondary Standard Dosimetry Laboratory - SSDL provides the calibration coefficient of the dosimeters in reference to the Half Value Layers - HVL implemented in their laboratories. The dosimetry calibration data is enough when the user has the same system as the laboratory where the ionization chamber has been calibrated. However, there are other calibration systems that have different calibration qualities implemented using different combinations of anode and filter and, therefore, there is no direct relation with the calibration coefficient. How to deal with this? There are two different ways to obtain calibration coefficients when the user's implemented qualities are different from the calibration laboratory's qualities. The first is the interpolation of each calibration coefficient stated in the certificate. The second is the fit of all calibration coefficients, separately for non-attenuated and attenuated beam qualities, to obtain a function by which the calibration coefficients can be determined at each beam quality. The second one includes the statistical fluctuation. The dosimetry calibration data must fit an analytical form, as for example a

  17. L'étude du suivi du regard, un nouvel outil au service du projet de paysage

    OpenAIRE

    Bouvier, Vincent

    2008-01-01

    L'étude du suivi du regard peut-elle contribuer à l'élaboration et à la validation du projet de paysage ? L'étude des mouvements oculaires consiste à enregistrer et à analyser la façon dont les yeux d'un sujet bougent durant l'observation. Les premiers résultats confirment la forte variation interindividuelle pour une même stimulation visuelle et l'importance de la culture de l'observateur. Indépendamment de notre volonté, notre regard est attiré par un fort contraste lumineux entre le fond e...

  18. A variable acceleration calibration system

    Science.gov (United States)

    Johnson, Thomas H.

    2011-12-01

    A variable acceleration calibration system that applies loads using gravitational and centripetal acceleration serves as an alternative, efficient and cost effective method for calibrating internal wind tunnel force balances. Two proof-of-concept variable acceleration calibration systems are designed, fabricated and tested. The NASA UT-36 force balance served as the test balance for the calibration experiments. The variable acceleration calibration systems are shown to be capable of performing three component calibration experiments with an approximate applied load error on the order of 1% of the full scale calibration loads. Sources of error are indentified using experimental design methods and a propagation of uncertainty analysis. Three types of uncertainty are indentified for the systems and are attributed to prediction error, calibration error and pure error. Angular velocity uncertainty is shown to be the largest indentified source of prediction error. The calibration uncertainties using a production variable acceleration based system are shown to be potentially equivalent to current methods. The production quality system can be realized using lighter materials and a more precise instrumentation. Further research is needed to account for balance deflection, forcing effects due to vibration, and large tare loads. A gyroscope measurement technique is shown to be capable of resolving the balance deflection angle calculation. Long term research objectives include a demonstration of a six degree of freedom calibration, and a large capacity balance calibration.

  19. Automatic force balance calibration system

    Science.gov (United States)

    Ferris, Alice T.

    1995-05-01

    A system for automatically calibrating force balances is provided. The invention uses a reference balance aligned with the balance being calibrated to provide superior accuracy while minimizing the time required to complete the calibration. The reference balance and the test balance are rigidly attached together with closely aligned moment centers. Loads placed on the system equally effect each balance, and the differences in the readings of the two balances can be used to generate the calibration matrix for the test balance. Since the accuracy of the test calibration is determined by the accuracy of the reference balance and current technology allows for reference balances to be calibrated to within +/-0.05% the entire system has an accuracy of +/-0.2%. The entire apparatus is relatively small and can be mounted on a movable base for easy transport between test locations. The system can also accept a wide variety of reference balances, thus allowing calibration under diverse load and size requirements.

  20. COMMUNICATION DU CREDIT AGRICOLE - French version only

    CERN Multimedia

    2003-01-01

    La Direction du Crédit Agricole informe son aimable clientèle du CERN des jours et heures d'ouverture de l'agence du site de Prévessin à compter du mardi 14 janvier 2003 : 1. Horaires pour les opérations bancaires courantes 7 jours sur 7 et 24h/24 avec l'espace libre service bancaire. 2. Horaires conseil du mardi au vendredi - Mardi, de 9h. à 12h. et de 14h.15 à 16h.30. - Mercredi, jeudi et vendredi, de 9h. à 12h. et de 13h.30 à 16h.30. Deux collaboratrices au lieu d'une seront désormais présentes toute la journée du mardi au vendredi pour vous accueillir, vous informer et vous conseiller en crédits et placements (réception conseil sur rendez-vous). Autre nouveauté : les mêmes conseillers seront aussi à votre disposition le samedi, sur notre agence de Gex, de 8h.15 à 13h.05, notamment pour les études de financements habitat. La Direction et toute l'équipe de l'agence du Crédit Agricole vous souhaitent une excellent année 2003.

  1. INDE. Le chant du Mohini Attam, danse classique du Kerala

    OpenAIRE

    Contri, Fabrice

    2014-01-01

    Voici un objet fort précieux, dans le meilleur sens du terme, comme ces guirlandes de joyaux dont sont ornées, en Inde, les divinités que ne cesse de célébrer le Mōhiniyāṭṭam ou « danse de l’Enchanteresse ». La dévotion avec tout l’élan de l’être – l’intellect, l’esprit, sans omettre le corps –, c’est bien un aspect essentiel de cette forme d’expression, ô combien subtile ; c’est également ce qui anime, avec ferveur, la danse et la musique indiennes. Ce nouveau Cd, de la très belle collection...

  2. De Sumer à Seattle, le voyage du bout du monde

    OpenAIRE

    Olivier Walther

    2011-01-01

    « Les affaires qui se nouent par-dessus les frontières qui séparent les peuples ne font pas que ces frontières n'existent pas » notait Émile Durkheim en 1895 (1895 : 113). Un peu plus d’un siècle plus tard, l’ouvrage de William J. Bernstein intitulé A Splendid Exchange et sous-titré de manière inspirée How Trade Shaped the World vient apporter une confirmation étayée au sociologue français. De Sumer où fut introduit le commerce du cuivre 3000 ans avant Jésus-Christ, à Seattle où se tint la tr...

  3. De Sumer à Seattle, le voyage du bout du monde

    Directory of Open Access Journals (Sweden)

    Olivier Walther

    2008-12-01

    Full Text Available « Les affaires qui se nouent par-dessus les frontières qui séparent les peuples ne font pas que ces frontières n'existent pas » notait Émile Durkheim en 1895 (1895 : 113. Un peu plus d’un siècle plus tard, l’ouvrage de William J. Bernstein intitulé A Splendid Exchange et sous-titré de manière inspirée How Trade Shaped the World vient apporter une confirmation étayée au sociologue français. De Sumer où fut introduit le commerce du cuivre 3000 ans avant Jésus-Christ, à Seattle où se tint la tr...

  4. Le cas du Haut-Adige ou Tyrol du Sud

    Directory of Open Access Journals (Sweden)

    Licia Bagini Scantamburlo

    2007-06-01

    Full Text Available La situation de cette région italienne est vraiment emblématique des rapports entre « les territoires et l’identité » à cause de la présence de différentes communautés linguistiques autochtones, dont les plus importantes sont les minorités germanophone et latine. S’il est vrai que cette situation existe également dans d’autres régions italiennes, il est incontestable que dans le Haut-Adige/Tyrol du Sud elle présente des caractéristiques très spécifiques et uniques pour l’Italie, car les italo...

  5. Structured light camera calibration

    Science.gov (United States)

    Garbat, P.; Skarbek, W.; Tomaszewski, M.

    2013-03-01

    Structured light camera which is being designed with the joined effort of Institute of Radioelectronics and Institute of Optoelectronics (both being large units of the Warsaw University of Technology within the Faculty of Electronics and Information Technology) combines various hardware and software contemporary technologies. In hardware it is integration of a high speed stripe projector and a stripe camera together with a standard high definition video camera. In software it is supported by sophisticated calibration techniques which enable development of advanced application such as real time 3D viewer of moving objects with the free viewpoint or 3D modeller for still objects.

  6. Smart Calibration of Excavators

    DEFF Research Database (Denmark)

    Bro, Marie; Døring, Kasper; Ellekilde, Lars-Peter; Hansen, Mikael Sonne; Markvorsen, Steen; Spence, David; Stolpe, Mathias; Sølvason, Dorthe

    2005-01-01

    Excavators dig holes. But where is the bucket? The purpose of this report is to treat four different problems concerning calibrations of position indicators for excavators in operation at concrete construction sites. All four problems are related to the question of how to determine the precise...... geographic and/or site-relative position of a given excavator and its bucket. However, our presentations and solutions to the problems can, nevertheless, be read and studied in any order and independently of each other. This also implies and induces a gentle warning to the reader: The {\\em{notation}} need...

  7. : La part du lion : les dessous du ralentissement économique chinois

    OpenAIRE

    Fabre, Guilhem

    2013-01-01

    Le plan de relance qui a suivi la crise globale, en 2009-2010, avec une expansion considérable du crédit, a marqué la fin de la " Chine bon marché ", avec la sous-évaluation du travail, du capital, du terrain, de l'énergie, et de la monnaie, tout en déséquilibrant fortement la croissance au profit du secteur public et de l'immobilier, la part du lion de l'État-Parti. Le processus actuel de désendettement doit régler les problèmes d'inégalités majeures qui dérivent des distorsions dans l'alloc...

  8. Nouvelles du Centre Aéré de l’Association du Personnel du CERN

    CERN Multimedia

    Jardin d'enfants

    2015-01-01

    Cet été 2015, durant quatre semaines d’été, le Centre Aéré a accueilli plus de 40 enfants âgés de 4 à 6 ans. Devant le succès rencontré, et à la demande des parents, il a été décidé d’en doubler la capacité maximale. A l'été 2016, du 4 au 29 juillet, la structure pourra accueillir les enfants de 4 ans révolus et de moins de 7 ans (nés après le 31/07/2009 mais avant  01/07/2012). Les inscriptions se feront à la semaine durant le mois d'Avril 2016. Les programmes sont en cours d'élaboration cependant nous pouvons déjà vous communiquer le thème conducteur du centre qui sera : à la découverte d'un continent différent chaque ...

  9. L'impossible cartographie du terrorisme

    OpenAIRE

    Bigo, Didier

    2005-01-01

    Le terrorisme n'existe pas : ou plus exactement, ce n'est pas un concept utilisable par les sciences sociales et la stratégie. En revanche l'usage du terme a une forte signification politique. Pour expliquer ce paradoxe apparent, il est nécessaire d'analyser les usages du terme terrorisme et leurs implications. Nous qu'adversaires en présence comme tiers, victimes, font du terrorisme une forme de conflit spécifique qui aurait sa propre unité et qui pourrait être analysé selon une grille de le...

  10. Du glacier au glacier rocheux, depuis la fin du Petit Âge Glaciaire, au pied du Mont Thabor (Alpes du Nord, France)

    OpenAIRE

    Monnier, Sébastien

    2010-01-01

    Le glacier rocheux du Thabor-Cheval Blanc, à l’extrême sud de la Savoie (Alpes du Nord françaises), est un spécimen spectaculaire et fascinant. D’après les informations fournies par des documents historiques (cartes et croquis anciens), ce glacier rocheux s’est dévoilé dans le paysage au cours des deux derniers siècles : un vrai glacier se trouvait effectivement à son emplacement à la fin du Petit Âge Glaciaire. L’objectif de cet article est de comprendre comment a pu se produire une évolutio...

  11. Les complications gastro-intestinales du diabete

    OpenAIRE

    Belaiche, Jacques; GAST, Pierrette; Delwaide, Jean; Etienne, Marie-Thérèse

    1989-01-01

    Les complications gastro-intestinales du diabète peuvent toucher la totalité du tube digestif. Elles sont fréquentes et compliquent habituellement un diabète ancien et insulinodépendant. Elles sont souvent latentes, mises en évidence par des méthodes isotopiques ou manométriques, parfois invalidantes comme la gastroparésie, la diarrhée et l'incontinence fécale. L'atteinte digestive s'associe toujours à une atteinte nerveuse périphérique et fait partie des manifestations neurovégétatives du di...

  12. Use of Radiometrically Calibrated Flat-Plate Calibrators in Calibration of Radiation Thermometers

    Science.gov (United States)

    Cárdenas-García, D.; Méndez-Lango, E.

    2015-08-01

    Most commonly used, low-temperature, infrared thermometers have large fields of view sizes that make them difficult to be calibrated with narrow aperture blackbodies. Flat-plate calibrators with large emitting surfaces have been proposed for calibrating these infrared thermometers. Because the emissivity of the flat plate is not unity, its radiance temperature is wavelength dependent. For calibration, the wavelength pass band of the device under test should match that of the reference infrared thermometer. If the device under test and reference radiometer have different pass bands, then it is possible to calculate the corresponding correction if the emissivity of the flat plate is known. For example, a correction of at is required when calibrating a infrared thermometer with a "" radiometrically calibrated flat-plate calibrator. A method is described for using a radiometrically calibrated flat-plate calibrator that covers both cases of match and mismatch working wavelength ranges of a reference infrared thermometer and infrared thermometers to be calibrated with the flat-plate calibrator. Also, an application example is included in this paper.

  13. Gênes et les réseaux du commerce du sucre à la fin du Moyen Âge

    OpenAIRE

    Ouerfelli, Mohamed

    2014-01-01

    La présente contribution examine le rôle des hommes d’affaires génois dans le commerce du sucre en Méditerranée, à la fin du Moyen Âge. S’ils montrent un désintérêt progressif pour ce trafic lucratif en Orient, notamment dans le royaume de Chypre, ils sont en revanche plus dynamiques en Sicile et surtout dans le royaume de Grenade. Dans cette dernière région, ils s’implantent solidement et obtiennent le monopole de l’exportation du sucre et des fruits secs, qu’ils acheminent jusqu’en Mer du N...

  14. Dosimetry and Calibration Section

    International Nuclear Information System (INIS)

    The Dosimetry and Calibration Section fulfils two tasks within CERN's Radiation Protection Group: the Individual Dosimetry Service monitors more than 5000 persons potentially exposed to ionizing radiation on the CERN sites, and the Calibration Laboratory verifies throughout the year, at regular intervals, over 1000 instruments, monitors, and electronic dosimeters used by RP Group. The establishment of a Quality Assurance System for the Individual Dosimetry Service, a requirement of the new Swiss Ordinance for personal dosimetry, put a considerable workload on the section. Together with an external consultant it was decided to identify and then describe the different 'processes' of the routine work performed in the dosimetry service. The resulting Quality Manual was submitted to the Federal Office for Public Health in Bern in autumn. The CERN Individual Dosimetry Service will eventually be officially endorsed after a successful technical test in March 1999. On the technical side, the introduction of an automatic development machine for gamma films was very successful. It processes the dosimetric films without an operator being present, and its built-in regeneration mechanism keeps the concentration of the processing chemicals at a constant level

  15. Calibration of the Pierre Auger Observatory fluorescence detectors and the effect on measurements

    Science.gov (United States)

    Gookin, Ben

    The Pierre Auger Observatory is a high-energy cosmic ray observatory located in Malargue, Mendoza, Argentina. It is used to probe the highest energy particles in the Universe, with energies greater than 1018 eV, which strike the Earth constantly. The observatory uses two techniques to observe the air shower initiated by a cosmic ray: a surface detector composed of an array of more than 1600 water Cherenkov tanks covering 3000 km2, and 27 nitrogen fluorescence telescopes overlooking this array. The Cherenkov detectors run all the time and therefore have high statistics on the air showers. The fluorescence detectors run only on clear moonless nights, but observe the longitudinal development of the air shower and make a calorimetric measure of its energy. The energy measurement from the the fluorescence detectors is used to cross calibrate the surface detectors, and makes the measurements made by the Auger Observatory surface detector highly model-independent. The calibration of the fluorescence detectors is then of the utmost importance to the measurements of the Observatory. Described here are the methods of the absolute and multi-wavelength calibration of the fluorescence detectors, and improvements in each leading to a reduction in calibration uncertainties to 4% and 3.5%, respectively. Also presented here are the effects of introducing a new, and more detailed, multi-wavelength calibration on the fluorescence detector energy estimation and the depth of the air shower maximum measurement, leading to a change of 1+-0.03% in the absolute energy scale at 1018 eV, and a negligible change in the measurement on shower maximum.

  16. Effets des contraintes mécaniques du sol sur la limitation des rendements du tournesol

    OpenAIRE

    Mirleau-Thebaud, Virginie

    2012-01-01

    La production de tournesol inclue des interactions complexes entre le génotype et l'environnement tout au long du cycle de la culture. La profondeur de l'enracinement du tournesol est fortement liée au sol, à sa structure et à la disponibilité en eau. La compaction du sol représente un enjeu important dans le contexte actuel de la durabilité des systèmes agricoles, et se caractérise par une diminution de la disponibilité hydrique du sol, une augmentation de la densité apparente et la résistan...

  17. Chapitre VI. Prudence du financement

    OpenAIRE

    Jambard, Pierre

    2015-01-01

    L’histoire financière de la société permet de comprendre bien des traits de son histoire. Comme toutes les entreprises du bâtiment et des travaux publics, la Société Auxiliaire s’est trouvée devant la nécessité de disposer d’importants capitaux circulants. Grâce à une gestion financière efficace, elle est, en général, parvenue à dégager de son activité les fonds nécessaires, bien que l’aisance de la trésorerie quotidienne n’ait été acquise qu’avec la reconversion. Les années 1927-1946 sont ce...

  18. Caractérisation du fromage Bastelicaccia

    OpenAIRE

    Casalta, Erick; Noël, Yolande; le Bars, Dominique; Carré, Christophe; Achilleos, Christine; Maroselli, Marie-Xavière

    2001-01-01

    Les paramètres de fabrication et les caractéristiques microbiologiques, physico-chimiques et rhéologiques du Bastelicaccia, fromage à pâte molle de Corse, ont été étudiés dans le but de caractériser le produit. Le travail a été réalisé chez 4 producteurs fromagers fermiers, deux transformant du lait de chèvre et deux du lait de brebis, en hiver et au printemps. Les dénombrements réalisés montrent que les lactocoques et les leuconostocs sont dominants dans la microflore du fromage (de l'ordre ...

  19. Camera Calibration: a USU Implementation

    OpenAIRE

    Ma, Lili; Chen, YangQuan; Moore, Kevin L.

    2003-01-01

    The task of camera calibration is to estimate the intrinsic and extrinsic parameters of a camera model. Though there are some restricted techniques to infer the 3-D information about the scene from uncalibrated cameras, effective camera calibration procedures will open up the possibility of using a wide range of existing algorithms for 3-D reconstruction and recognition. The applications of camera calibration include vision-based metrology, robust visual platooning and visual docking of mobil...

  20. Calibration procedure for zenith plummets

    Directory of Open Access Journals (Sweden)

    Jelena GUČEVIĆ

    2013-09-01

    Full Text Available Zenith plummets are used mainly in applied geodesy, in civil engineering surveying, for materialization of the local vertical. The error of the vertical deflection of the instrument is directly transferred to the error of the observing construction. That is why a proper calibration procedure for the zenithlot is required. Metrological laboratory of the Faculty of Civil Engineering in Belgrade developed such calibration procedure. Here we present a mathematical model of the calibration and some selected results.

  1. Calibration procedure for zenith plummets

    OpenAIRE

    Jelena GUČEVIĆ; Delčev, Siniša; Vukan OGRIZOVIĆ

    2013-01-01

    Zenith plummets are used mainly in applied geodesy, in civil engineering surveying, for materialization of the local vertical. The error of the vertical deflection of the instrument is directly transferred to the error of the observing construction. That is why a proper calibration procedure for the zenithlot is required. Metrological laboratory of the Faculty of Civil Engineering in Belgrade developed such calibration procedure. Here we present a mathematical model of the calibration and som...

  2. Programmation et représentation dans la fabula du désir du lecteur

    Directory of Open Access Journals (Sweden)

    Emmanuelle Occelli

    2004-01-01

    Full Text Available Sollicitant une intense activité lectorale, Le crime d’Olga Arbélina d’Andreï Makine repose sur un dispositif textuel complexe qui programme efficacement le désir de son lecteur par un ensemble de procédés convergents. Ces procédés programmatifs sont de deux sortes. En premier lieu, le titre de l’œuvre essaimé plus ou moins fidèlement dans le texte, métaphorisé, voire invalidé, convie le lecteur à une enquête dans une œuvre qui s’apparente à un roman policier. D’autre part, la représentation du désir du personnage-titre, Olga, préfigure celui du lecteur et lui désigne l’attitude à adopter, tout en entretenant l’illusion que le personnage est constamment en retard sur ses attentes. Le parcours de ce dernier balise celui du lecteur qui a pourtant l’impression que le comportement du personnage reflète, en différé, le sien. C’est moins une mise en abyme du désir métadiégétique du lecteur qu’un dispositif destiné à le susciter. La représentation du désir intradiégétique est, en effet, programmative plutôt que reproductrice. Le jeu dialectique qu’élabore le roman fait se croiser les désirs de l’auteur, du lecteur et des personnages : l’auteur inscrit le désir du lecteur dans la fabula par le truchement d’un personnage dont les pensées et les réactions représentent et déterminent celles du lecteur.

  3. Radiological Calibration and Standards Facility

    Data.gov (United States)

    Federal Laboratory Consortium — PNNL maintains a state-of-the-art Radiological Calibration and Standards Laboratory on the Hanford Site at Richland, Washington. Laboratory staff provide expertise...

  4. Calibration Techniques for VERITAS

    CERN Document Server

    Hanna, David

    2007-01-01

    VERITAS is an array of four identical telescopes designed for detecting and measuring astrophysical gamma rays with energies in excess of 100 GeV. Each telescope uses a 12 m diameter reflector to collect Cherenkov light from air showers initiated by incident gamma rays and direct it onto a `camera' comprising 499 photomultiplier tubes read out by flash ADCs. We describe here calibration methods used for determining the values of the parameters which are necessary for converting the digitized PMT pulses to gamma-ray energies and directions. Use of laser pulses to determine and monitor PMT gains is discussed, as are measurements of the absolute throughput of the telescopes using muon rings.

  5. Determination of Nuclear Charge Distributions of Fission Fragments from ^{235} U (n_th , f) with Calorimetric Low Temperature Detectors

    Science.gov (United States)

    Grabitz, P.; Andrianov, V.; Bishop, S.; Blanc, A.; Dubey, S.; Echler, A.; Egelhof, P.; Faust, H.; Gönnenwein, F.; Gomez-Guzman, J. M.; Köster, U.; Kraft-Bermuth, S.; Mutterer, M.; Scholz, P.; Stolte, S.

    2016-03-01

    Calorimetric low temperature detectors (CLTD's) for heavy-ion detection have been combined with the LOHENGRIN recoil separator at the ILL Grenoble for the determination of nuclear charge distributions of fission fragments produced by thermal neutron-induced fission of ^{235} U. The LOHENGRIN spectrometer separates fission fragments according to their mass-to-ionic-charge ratio and their kinetic energy, but has no selectivity with respect to nuclear charges Z. For the separation of the nuclear charges, one can exploit the nuclear charge-dependent energy loss of the fragments passing through an energy degrader foil (absorber method). This separation requires detector systems with high energy resolution and negligible pulse height defect, as well as degrader foils which are optimized with respect to thickness, homogeneity, and energy loss straggling. In the present, contribution results of test measurements at the Maier Leibnitz tandem accelerator facility in Munich with ^{109} Ag and ^{127} I beams with the aim to determine the most suitable degrader material, as well as measurements at the Institut Laue-Langevin will be presented. These include a systematic study of the quality of Z-separation of fission fragments in the mass range 82≤ A ≤ 132 and a systematic measurement of ^{92} Rb fission yields, as well as investigations of fission yields toward the symmetry region.

  6. Determination of Nuclear Charge Distributions of Fission Fragments from ^{235}U (n_th, f) with Calorimetric Low Temperature Detectors

    Science.gov (United States)

    Grabitz, P.; Andrianov, V.; Bishop, S.; Blanc, A.; Dubey, S.; Echler, A.; Egelhof, P.; Faust, H.; Gönnenwein, F.; Gomez-Guzman, J. M.; Köster, U.; Kraft-Bermuth, S.; Mutterer, M.; Scholz, P.; Stolte, S.

    2016-08-01

    Calorimetric low temperature detectors (CLTD's) for heavy-ion detection have been combined with the LOHENGRIN recoil separator at the ILL Grenoble for the determination of nuclear charge distributions of fission fragments produced by thermal neutron-induced fission of ^{235}U. The LOHENGRIN spectrometer separates fission fragments according to their mass-to-ionic-charge ratio and their kinetic energy, but has no selectivity with respect to nuclear charges Z. For the separation of the nuclear charges, one can exploit the nuclear charge-dependent energy loss of the fragments passing through an energy degrader foil (absorber method). This separation requires detector systems with high energy resolution and negligible pulse height defect, as well as degrader foils which are optimized with respect to thickness, homogeneity, and energy loss straggling. In the present, contribution results of test measurements at the Maier Leibnitz tandem accelerator facility in Munich with ^{109}Ag and ^{127}I beams with the aim to determine the most suitable degrader material, as well as measurements at the Institut Laue-Langevin will be presented. These include a systematic study of the quality of Z-separation of fission fragments in the mass range 82le A le 132 and a systematic measurement of ^{92}Rb fission yields, as well as investigations of fission yields toward the symmetry region.

  7. Kinetic and calorimetric study of the adsorption of dyes on mesoporous activated carbon prepared from coconut coir dust.

    Science.gov (United States)

    Macedo, Jeremias de Souza; da Costa Júnior, Nivan Bezerra; Almeida, Luis Eduardo; Vieira, Eunice Fragoso da Silva; Cestari, Antonio Reinaldo; Gimenez, Iara de Fátima; Villarreal Carreño, Neftali Lênin; Barreto, Ledjane Silva

    2006-06-15

    Mesoporous activated carbon has been prepared from coconut coir dust as support for adsorption of some model dye molecules from aqueous solutions. The methylene blue (MB) and remazol yellow (RY) molecules were chosen for study of the adsorption capacity of cationic and anionic dyes onto prepared activated carbon. The adsorption kinetics was studied with the Lagergren first- and pseudo-second-order kinetic models as well as the intraparticle diffusion model. The results for both dyes suggested a multimechanism sorption process. The adsorption mechanisms in the systems dyes/AC follow pseudo-second-order kinetics with a significant contribution of intraparticle diffusion. The samples simultaneously present acidic and basic sites able to act as anchoring sites for basic and acidic dyes, respectively. Calorimetric studies reveal that dyes/AC interaction forces are correlated with the pH of the solution, which can be related to the charge distribution on the AC surface. These AC samples also exhibited very short equilibrium times for the adsorption of both dyes, which is an economically favorable requisite for the activated carbon described in this work, in addition to the local abundance of the raw material. PMID:16497318

  8. Thermal characterization of a high-power lithium-ion battery: Potentiometric and calorimetric measurement of entropy changes

    International Nuclear Information System (INIS)

    This paper focuses on the thermal behaviour of high-power lithium-ion cells during charge-discharge at several current rates. A series of tests are conducted using an accelerating rate calorimeter to promote an adiabatic environment. Cell heat capacity is identified and the overall heat generated is quantified. Cell entropy is measured, using both potentiometric and calorimetric methods. The part of reversible reaction in the overall thermal behaviour is determined during charge-discharge tests and compared to joule losses. The influence of the state-of-charge variation and the impact of charge-discharge current rate on battery heat generation are highlighted. Experimental results for two lithium-ion technologies are presented and discussed. - Highlights: • ARC calorimeter for high power lithium-ion cell heat measurement at several Crates. • Global heat generation is related to both joule heating and entropy change. • Discharge dominates the global exothermic thermal behaviour especially at low Crate. • Reversible heat is significantly dependent on SOC evolution. • Entropy change influence on heat generation was less important at high Crate

  9. Simultaneous measurements of high-temperature total hemispherical emissivity and thermal conductivity using a steady-state calorimetric technique

    International Nuclear Information System (INIS)

    A method was developed to simultaneously measure the total hemispherical emissivity and the thermal conductivity of samples at high temperatures. The inverse problem to determine the emissivity and thermal conductivity from steady-state high-temperature calorimetric experiments was established based on models for these two quantities. The accuracy of the inverse solution was numerically analyzed for various noise levels for samples with various thermophysical properties. The simulation results illustrate that the calculation accuracies for the emissivity and thermal conductivity strongly depend on the proportions of the radiation and conduction heat fluxes in the strip sample arising from the temperature distributions in the sample. Steady-state high-temperature experiments with nickel samples were used to experimentally verify the method. The inverse solution results for the emissivity and thermal conductivity calculated from the measured data agree well with reported data in the literature. This research provides a useful reference for measuring the total hemispherical emissivity and thermal conductivity of conductive samples at high temperatures. (paper)

  10. Differential scanning calorimetric studies on the thermotropic phase behavior of dry and hydrated forms of N-acyltyramines

    International Nuclear Information System (INIS)

    Graphical abstract: - Highlights: • Synthesis of a homologous series of N-acyltyramine. • Dry and hydrated N-acyltyramine undergoes a major sharp endothermic transition. • Calorimetric transition enthalpy and entropy obtained from the corresponding transition depends linearly on the number of carbon atoms. - Abstract: In this paper, a homologous series of N-acyltyramine (NATA) – which is biosynthetic precursor for neuroactive lipids, N-acyldopamine – have been synthesized and their thermotropic phase transitions were characterized by differential scanning calorimetry (DSC). NATA undergoes a major sharp endothermic transition with the melting point of the hydrated samples occurs considerably at lower temperature compared to the dry samples. Thermodynamic parameters, transition enthalpy (ΔHt) and transition entropy (ΔSt), associated with the chain-melting phase transitions depends linearly on the number of carbon atoms. The contributions of each methylene unit to the transition enthalpy and entropy and the end contributions arising from the head group and the terminal group was determined and reported. These results are very important to understand the thermodynamics basis of NATA phase properties in other membrane lipids

  11. Calorimetric low temperature detectors for high resolution x-ray spectroscopy on stored highly stripped heavy ions

    International Nuclear Information System (INIS)

    The precise determination of the Lamb shift in heavy hydrogen-like ions provides a sensitive test of QED in very strong Coulomb fields, not accessible otherwise, and has also the potential to deduce nuclear charge radii. A brief overview on the present status of such experiments, performed at the storage ring ESR at GSI Darmstadt, is given. For the investigation of the Lyman-α transitions in Au78+- or U91+- ions with improved accuracy a high resolving calorimetric low temperature detector for hard x-rays (E≤100 keV) is presently developed. The detector modules consist of arrays of silicon thermistors and of x-ray absorbers made of high Z material to optimize the absorption efficiency. The detectors are housed in a specially designed 3He/4He dilution refrigerator which fits to the geometry of the ESR target. The detector performance presently achieved is already close to fulfill the demands of the Lamb shift experiment. For a prototype detector an energy resolution of ΔEFWHM=75 eV is obtained for 60 keV x-rays

  12. Calorimetric Low Temperature Detectors for High Resolution X-ray Spectroscopy on Stored Highly Stripped Heavy Ions

    International Nuclear Information System (INIS)

    The precise determination of the Lamb shift in heavy hydrogen-like ions provides a sensitive test of QED in very strong Coulomb fields, not accessible otherwise, and has also the potential to deduce nuclear charge radii. A brief overview on the present status of such experiments, performed at the storage ring ESR at GSI Darmstadt, is given. For the investigation of the Lyman-α transitions in Au78+ or U91+ ions with improved accuracy, a high-resolution calorimetric low-temperature detector for hard x-rays (E ≤ 100 keV) has been recently developed. The detector modules consist of arrays of silicon thermistors and of x-ray absorbers made of high-Z material to optimize the absorption efficiency. The detectors are housed in a specially designed 3He/4He dilution refrigerator which fits to the geometry of the ESR target. The detector performance presently achieved is already close to fulfilling the demands of the Lamb shift experiment. For a prototype detector an energy resolution of ΔEFWHM = 75 eV is obtained for 60-keV x-rays

  13. Complexation of manganese(II) by cyclohexano-15-crown-5 in propylene carbonate: Calorimetric and X-ray crystallographic investigation

    Energy Technology Data Exchange (ETDEWEB)

    Deng, Yanpei; Burns, J.H.; Moyer, B.A. [Oak Ridge National Lab., TN (United States)

    1995-01-04

    Calorimetric titrimetry reveals that cyclohexano-15-crown-5 (C15C5) forms a 1:1 complex with Mn(II) ions (2.5 mM) in propylene carbonate (PC) solution to which was added levels of water up to 134 mM. The reaction proceeds with a strong driving force (log K = 4.7-5.0) and is enthalpically driven overall, but the magnitude of the enthalpy change decreases with increasing water concentration in the case of the Mn(II) nitrate salt. A minor anion effect occurs in which the trifluoromethansulfonate ion gives slightly more negative values of {Delta}H and T{Delta}S than the nitrate ion. Values of log K, however, do not change appreciably with increasing water concentration, nor are they dependent on the anion. The crystal structure of Mn(C15C5)(CF{sub 3}SO{sub 3}){sub 2} was determined, showing that the Mn(II) ion is coordinated by a pentagonal bipyramid of oxygen atoms provided by the equatorial crown {Angstrom}, b=14.145(1) {Angstrom}, c = 13,420(1) {Angstrom} {beta} = 100.31(2){degrees}, V = 5028 {Angstrom}{sup 3}, Z = 8, t = 26 {degrees}C. For 2178 reflections with I > {sigma}(I), and 325 parameters, R(F) = 0.050 and R{sub w}(F) = 0.054.

  14. Arginine inhibits aggregation of α-lactalbumin but also decreases its stability: Calorimetric, spectroscopic, and molecular dynamics studies

    International Nuclear Information System (INIS)

    Highlights: • Arginine inhibits aggregation of α-lactalbumin, however, it destabilizes the protein. • ITC results show favorable interactions between α-lactalbumin and arginine. • Strong interactions of guanidinium group with α-lactalbumin leads to its destabilization. • Like charges repulsions decreases the severity of the destabilization. - Abstract: Arginine (Arg) has long been used to inhibit aggregation of proteins. Despite its frequent use in inhibition of aggregation, the exact mechanism of aggregation and the effect of Arg on the conformation and stability of proteins are still not well understood. In the present study, spectroscopic, calorimetric, and molecular dynamics methods have been used to understand the mechanism of inhibition of aggregation of α-lactalbumin (α-LA) by Arg along with its effect on stability of the protein. It is observed that although Arg inhibits aggregation of α-LA, it also decreases stability of the protein. The results suggest that strong favorable interactions between α-LA and guanidinium group of Arg decrease the stability of the protein. The results also suggest that the guanidinium group preferentially interacts with Gln, Asn and negatively charged residues through hydrogen bonding and electrostatic interactions

  15. Differential scanning calorimetric studies on the thermotropic phase behavior of dry and hydrated forms of N-acyltyramines

    Energy Technology Data Exchange (ETDEWEB)

    Priscilla, Stevenson [Department of Chemistry, School of Chemical and Biotechnology, SASTRA University, Thanjavur, Tamil Nadu (India); Sivaramakrishna, D. [School of Chemistry, University of Hyderabad, Hyderabad, Andhra Pradesh (India); Anbazhagan, Veerappan, E-mail: anbazhagan@scbt.sastra.edu [Department of Chemistry, School of Chemical and Biotechnology, SASTRA University, Thanjavur, Tamil Nadu (India)

    2014-06-01

    Graphical abstract: - Highlights: • Synthesis of a homologous series of N-acyltyramine. • Dry and hydrated N-acyltyramine undergoes a major sharp endothermic transition. • Calorimetric transition enthalpy and entropy obtained from the corresponding transition depends linearly on the number of carbon atoms. - Abstract: In this paper, a homologous series of N-acyltyramine (NATA) – which is biosynthetic precursor for neuroactive lipids, N-acyldopamine – have been synthesized and their thermotropic phase transitions were characterized by differential scanning calorimetry (DSC). NATA undergoes a major sharp endothermic transition with the melting point of the hydrated samples occurs considerably at lower temperature compared to the dry samples. Thermodynamic parameters, transition enthalpy (ΔH{sub t}) and transition entropy (ΔS{sub t}), associated with the chain-melting phase transitions depends linearly on the number of carbon atoms. The contributions of each methylene unit to the transition enthalpy and entropy and the end contributions arising from the head group and the terminal group was determined and reported. These results are very important to understand the thermodynamics basis of NATA phase properties in other membrane lipids.

  16. Intercalative interaction of the anticancer drug mitoxantrone with double stranded DNA: A calorimetric characterization of the energetics

    International Nuclear Information System (INIS)

    Highlights: • Mitoxantrone binds to ds DNA with equilibrium constant of the order of 106 M−1. • The binding was driven by large negative enthalpy and small positive entropy. • The binding was dominated by hydrophobic forces. • Mitoxantrone enhanced the thermal stability of DNA remarkably. - Abstract: The interaction of the anticancer agent mitoxantrone with DNA was investigated using microcalorimetry. The results show that the binding of mitoxantrone to DNA was predominantly enthalpy driven with a small but favorable entropic contribution. The equilibrium constant for the binding reaction (mitoxantrone + DNA = mitoxantrone − DNA complex) was calculated to be (5.05 ± 0.06) · 106 M−1 at T = 298.15 K and the binding stoichiometry value show that ∼2 base pairs were spanned by each mitoxantrone molecule. The equilibrium constant decreased, the standard molar enthalpy change increased and the standard molar entropy change decreased with increasing temperature. However, the change in temperature had little effect on the standard molar Gibbs energy change. The negative value of the standard molar heat capacity change along with enthalpy–entropy compensation behavior suggests the involvement of dominant hydrophobic forces in the binding process. A small but favorable electrostatic component to the binding was revealed from salt dependent calorimetric data and the parsing of the standard molar Gibbs energy change. The binding increased the thermal stability of DNA and the value of the equilibrium constant calculated from the melting data was (6.26 ± 0.17) · 106 M−1

  17. Calorimetric Low-Temperature Detectors for X-Ray Spectroscopy on Trapped Highly-Charged Heavy Ions

    Science.gov (United States)

    Kilbourne, Caroline; Kraft-Bermuth, S.; Andrianov, V.; Bleile, A.; Echler, A.; Egelhof, P.; Ilieva, S.; Kilbourne, C.; McCammon, D.

    2012-01-01

    The application of Calorimetric Low-Temperature Detectors (CLTDs) has been proposed at the Heavy-Ion TRAP facility HITRAP which is currently being installed at the Helmholtz Research Center for Heavy Ion Research GSI. This cold ion trap setup will allow the investigation of X-rays from ions practically at rest, for which the excellent energy resolution of CLTDs can be used to its full advantage. However, the relatively low intensities at HITRAP demand larger solid angles and an optimized cryogenic setup. The influence of external magnetic fields has to be taken into account. CLTDs will also be a substantial part of the instrumental equipment at the future Facility for Antiproton and Heavy Ion Research (FAIR), for which a wide variety of high-precision X-ray spectroscopy experiments has been proposed. This contribution will give an overview on the chances and challenges for the application of CLTDs at HITRAP as well as perspectives for future experiments at the FAIR facility.

  18. TOD to TTP calibration

    Science.gov (United States)

    Bijl, Piet; Reynolds, Joseph P.; Vos, Wouter K.; Hogervorst, Maarten A.; Fanning, Jonathan D.

    2011-05-01

    The TTP (Targeting Task Performance) metric, developed at NVESD, is the current standard US Army model to predict EO/IR Target Acquisition performance. This model however does not have a corresponding lab or field test to empirically assess the performance of a camera system. The TOD (Triangle Orientation Discrimination) method, developed at TNO in The Netherlands, provides such a measurement. In this study, we make a direct comparison between TOD performance for a range of sensors and the extensive historical US observer performance database built to develop and calibrate the TTP metric. The US perception data were collected doing an identification task by military personnel on a standard 12 target, 12 aspect tactical vehicle image set that was processed through simulated sensors for which the most fundamental sensor parameters such as blur, sampling, spatial and temporal noise were varied. In the present study, we measured TOD sensor performance using exactly the same sensors processing a set of TOD triangle test patterns. The study shows that good overall agreement is obtained when the ratio between target characteristic size and TOD test pattern size at threshold equals 6.3. Note that this number is purely based on empirical data without any intermediate modeling. The calibration of the TOD to the TTP is highly beneficial to the sensor modeling and testing community for a variety of reasons. These include: i) a connection between requirement specification and acceptance testing, and ii) a very efficient method to quickly validate or extend the TTP range prediction model to new systems and tasks.

  19. La fin du risque zéro : du homegrown jihadism au terrorisme du loup solitaire

    Directory of Open Access Journals (Sweden)

    Rémi Baudouï

    2015-09-01

    Full Text Available Le risque zéro représente un moment historique particulier dans la conceptualisation de la socio-politique du risque. Son application repose au début des années 1980 sur l’hypothèse de la possibilité de progresser dans le domaine de l’anticipation et de la gestion sécuritaire des crises potentielles au point de pouvoir prémunir les populations contre toute forme de menace. Il fut employé dans les domaines de la protection civile et de la sécurité militaire. Comme élément de gouvernance politique, il réfutait l’idée selon laquelle le risque existe en préalable comme catégorie d’acceptabilité collective de la menace.

  20. Le risque dans l’entreprise : du drame du je, au tragique du jeu

    Directory of Open Access Journals (Sweden)

    Stéphane Hugon

    2015-09-01

    Full Text Available L’entreprise, structure organisatrice de la modernité et fine pointe de ses valeurs, concentre les richesses de nos sociétés, mais cette richesse est-elle encore en rapport avec une prise de risque ? Le risque est-il encore une valeur dans l’entreprise ? Notre but dans ce travail est de comprendre d’abord comment l’entreprise est devenue la structure fondamentale de la modernité et comment elle a été structurée autour du risque, ensuite d’évaluer les profonds changements que connait l’entreprise dans cette postmodernité naissante, pour enfin nous poser la question de la prégnance de la prise de risque par l’entreprise aujourd’hui.

  1. Entropy in Signal Processing (Entropie en Traitement du Signal)

    OpenAIRE

    Mohammad-Djafari, Ali

    2001-01-01

    R\\'esum\\'e: Le principal objet de cette communication est de faire une r\\'etro perspective succincte de l'utilisation de l'entropie et du principe du maximum d'entropie dans le domaine du traitement du signal. Apr\\`es un bref rappel de quelques d\\'efinitions et du principe du maximum d'entropie, nous verrons successivement comment l'entropie est utilis\\'ee en s\\'eparation de sources, en mod\\'elisation de signaux, en analyse spectrale et pour la r\\'esolution des probl\\`emes inverses lin\\'eaire...

  2. OGM : vers une définition commune du contenu du problème ?

    OpenAIRE

    Icart Jean-Claude

    2001-01-01

    Les divergences croissantes depuis des années entre experts, responsables économiques, et acteurs sociaux et « citoyens » au sujet des OGM, ont pu être analysées à juste titre, comme exprimant la difficulté de dégager une « définition commune du contenu du problème »1.

  3. Pru du 2S albumin or Pru du vicilin?

    Science.gov (United States)

    Garino, Cristiano; De Paolis, Angelo; Coïsson, Jean Daniel; Arlorio, Marco

    2015-06-01

    A short partial sequence of 28 amino acids is all the information we have so far about the putative allergen 2S albumin from almond. The aim of this work was to analyze this information using mainly bioinformatics tools, in order to verify its rightness. Based on the results reported in the paper describing this allergen from almond, we analyzed the original data of amino acids sequencing through available software. The degree of homology of the almond 12kDa protein with any other known 2S albumin appears to be much lower than the one reported in the paper that firstly described it. In a publicly available cDNA library we discovered an expressed sequence tag which translation generates a protein that perfectly matches both of the sequencing outputs described in the same paper. A further analysis indicated that the latter protein seems to belong to the vicilin superfamily rather than to the prolamin one. The fact that also vicilins are seed storage proteins known to be highly allergenic would explain the IgE reactivity originally observed. Based on our observations we suggest that the IgE reactive 12kDa protein from almond currently known as Pru du 2S albumin is in reality the cleaved N-terminal region of a 7S vicilin like protein. PMID:25854802

  4. Biokinetics and dosimetry of depleted uranium (DU) in rats implanted with DU fragments.

    Energy Technology Data Exchange (ETDEWEB)

    Guilmette, Ray A.; Hahn, Fletcher F.; Durbin, P. W.

    2004-01-01

    A number of U. S. veterans of the Persian Gulf War were wounded with depleted uranium (DU) metal fragments as a result of 'friendly fire' incidents, in which Abrams tanks and Bradley fighting vehicles were struck by DU anti-armor munitions. Some of the crew members who survived were left with multiple small fragments of DU in their muscles and soft tissues. The number, size and location of the fragments made them inoperable in general, and therefore subject to long-term retention. Because there was inadequate data to predict the potential carcinogenicity of DU fragments in soft tissues, Hahn et al. (2003) conducted a lifespan cancer study in rats. As part of that study, a number of rats were maintained to study the biokinetics and dosimetry of DU implanted intramuscularly in male Wistar rats. Typically, four metal fragments, either as cylindrical pellets or square wafers were implanted into the biceps femoris muscles of the rats. Urine samples were collected periodically during their lifespans, and DU was analyzed in kidneys and eviscerated carcass (minus the implant sites) at death. The daily DU urinary excretion rate increased steeply during the first 30 d after implantation peaking at about 90 d at 3-10 x 10{sup -3}%/d. During the first 150 d, the average excretion rate was 2.4 x 10{sup -3}%/d, decreasing thereafter to about 1 x 10{sup -3}%/d. Serial radiographs were made of the wound sites to monitor gross morphologic changes in the DU implant and the surrounding tissue. As early as 1 w after implantation, radiographs showed the presence of surface corrosion and small, dense bodies near the original implant, presumably DU. This corrosion from the surface of the implant continued with time, but did not result in an increasing amount of DU reaching the blood and urine after the first 3 mo. During this 3-mo period, connective tissue capsules formed around the implants, and are hypothesized to have reduced the access of DU to tissue fluids by limiting the

  5. Tectonic calibrations in molecular dating

    Institute of Scientific and Technical Information of China (English)

    Ullasa KODANDARAMAIAH

    2011-01-01

    Molecular dating techniques require the use of calibrations, which are usually fossil or geological vicariance-based.Fossil calibrations have been criticised because they result only in minimum age estimates. Based on a historical biogeographic perspective, Ⅰ suggest that vicariance-based calibrations are more dangerous. Almost all analytical methods in historical biogeography are strongly biased towards inferring vicariance, hence vicariance identified through such methods is unreliable. Other studies, especially of groups found on Gondwanan fragments, have simply assumed vicariance. Although it was previously believed that vicariance was the predominant mode of speciation, mounting evidence now indicates that speciation by dispersal is common, dominating vicariance in several groups. Moreover, the possibility of speciation having occurred before the said geological event cannot be precluded. Thus, geological calibrations can under- or overestimate times, whereas fossil calibrations always result in minimum estimates. Another major drawback of vicariant calibrations is the problem of circular reasoning when the resulting estimates are used to infer ages of biogeographic events. Ⅰ argue that fossil-based dating is a superior alternative to vicariance, primarily because the strongest assumption in the latter, that speciation was caused by the said geological process, is more often than not the most tenuous. When authors prefer to use a combination of fossil and vicariant calibrations, one suggestion is to report results both with and without inclusion of the geological constraints. Relying solely on vicariant calibrations should be strictly avoided.

  6. Field calibration of cup anemometers

    DEFF Research Database (Denmark)

    Kristensen, L.; Jensen, G.; Hansen, A.;

    2001-01-01

    An outdoor calibration facility for cup anemometers, where the signals from 10 anemometers of which at least one is a reference can be can be recorded simultaneously, has been established. The results are discussed with special emphasis on the statisticalsignificance of the calibration expressions...

  7. Le respect du droit du travail : entre politique de contrôle et politique pénale

    OpenAIRE

    Auvergnon, Philippe; Laviolette, Sandrine

    2004-01-01

    Le respect du droit du travail – ou sa moindre ineffectivité - tient en partie à l'action de l'inspection du travail. Dans quelle mesure s'inscrit-elle dans une politique de contrôle ? L'action pénale, elle-même inscrite ou non dans une politique pénale, peut aussi contribuer au respect du droit du travail en sanctionnant le relevé d'infractions. Le présent rapport tente de revisiter les pratiques et les relations entretenues entre Inspection du travail et Parquet, à partir d'une part de l'an...

  8. Liquid Krypton Calorimeter Calibration Software

    CERN Document Server

    Hughes, Christina Lindsay

    2013-01-01

    Calibration of the liquid krypton calorimeter (LKr) of the NA62 experiment is managed by a set of standalone programs, or an online calibration driver. These programs are similar to those used by NA48, but have been updated to utilize classes and translated to C++ while maintaining a common functionality. A set of classes developed to handle communication with hardware was used to develop the three standalone programs as well as the main driver program for online calibration between bursts. The main calibration driver has been designed to respond to run control commands and receive burst data, both transmitted via DIM. In order to facilitate the process of reading in calibration parameters, a serializable class has been introduced, allowing the replacement of standard text files with XML configuration files.

  9. The Advanced LIGO Photon Calibrators

    CERN Document Server

    Karki, S; Kandhasamy, S; Abbott, B P; Abbott, T D; Anders, E H; Berliner, J; Betzwieser, J; Daveloza, H P; Cahillane, C; Canete, L; Conley, C; Gleason, J R; Goetz, E; Kissel, J S; Izumi, K; Mendell, G; Quetschke, V; Rodruck, M; Sachdev, S; Sadecki, T; Schwinberg, P B; Sottile, A; Wade, M; Weinstein, A J; West, M; Savage, R L

    2016-01-01

    The two interferometers of the Laser Interferometry Gravitaional-wave Observatory (LIGO) recently detected gravitational waves from the mergers of binary black hole systems. Accurate calibration of the output of these detectors was crucial for the observation of these events, and the extraction of parameters of the sources. The principal tools used to calibrate the responses of the second-generation (Advanced) LIGO detectors to gravitational waves are systems based on radiation pressure and referred to as Photon Calibrators. These systems, which were completely redesigned for Advanced LIGO, include several significant upgrades that enable them to meet the calibration requirements of second-generation gravitational wave detectors in the new era of gravitational-wave astronomy. We report on the design, implementation, and operation of these Advanced LIGO Photon Calibrators that are currently providing fiducial displacements on the order of $10^{-18}$ m/$\\sqrt{\\textrm{Hz}}$ with accuracy and precision of better ...

  10. Antenna Calibration and Measurement Equipment

    Science.gov (United States)

    Rochblatt, David J.; Cortes, Manuel Vazquez

    2012-01-01

    A document describes the Antenna Calibration & Measurement Equipment (ACME) system that will provide the Deep Space Network (DSN) with instrumentation enabling a trained RF engineer at each complex to perform antenna calibration measurements and to generate antenna calibration data. This data includes continuous-scan auto-bore-based data acquisition with all-sky data gathering in support of 4th order pointing model generation requirements. Other data includes antenna subreflector focus, system noise temperature and tipping curves, antenna efficiency, reports system linearity, and instrument calibration. The ACME system design is based on the on-the-fly (OTF) mapping technique and architecture. ACME has contributed to the improved RF performance of the DSN by approximately a factor of two. It improved the pointing performances of the DSN antennas and productivity of its personnel and calibration engineers.

  11. TIME CALIBRATED OSCILLOSCOPE SWEEP CIRCUIT

    Science.gov (United States)

    Smith, V.L.; Carstensen, H.K.

    1959-11-24

    An improved time calibrated sweep circuit is presented, which extends the range of usefulness of conventional oscilloscopes as utilized for time calibrated display applications in accordance with U. S. Patent No. 2,832,002. Principal novelty resides in the provision of a pair of separate signal paths, each of which is phase and amplitude adjustable, to connect a high-frequency calibration oscillator to the output of a sawtooth generator also connected to the respective horizontal deflection plates of an oscilloscope cathode ray tube. The amplitude and phase of the calibration oscillator signals in the two signal paths are adjusted to balance out feedthrough currents capacitively coupled at high frequencies of the calibration oscillator from each horizontal deflection plate to the vertical plates of the cathode ray tube.

  12. Requirements for gamma radiation survey meter calibration

    International Nuclear Information System (INIS)

    This guide describes the minimum requirements for calibrating a portable analog gamma radiation survey meter by means of a beam calibrator, with a known calibration source. If an alternative method of calibration is to be used the licensee should make a written request to the Atomic Energy Control Board that describes the calibration method to be used, and request the Board's permission to use that method in place of the requirements contained in this guide. This guide explains: the responsibility for survey meter calibration if licensees calibrate their own survey meters, use the services of a Canadian calibration agency, and use the services of a non-Canadian calibration agency; the requirements for survey meter calibration and the supporting documentation; the requirements for record-keeping; and, a calibration certificate, a calibration sticker, and a notification of failure to calibrate form, with examples

  13. DU COTÉ DE CHEZ SOI

    Directory of Open Access Journals (Sweden)

    Marc Smeets

    2013-12-01

    Full Text Available Le voyage en Hollande, au XIXe siècle, s'inscrit dans une longue tradition où résonnent les notions de liberté, tolérance et commerce, mais il acquiert aussi une spécificité étant donné l’importance que prend la figure du « chez soi » : les Pays-Bas, terre d'agrément où le voyageur français se sent à l'aise et où il aimerait, si possible, vivre. Proust, de ce point de vue-là, ne fait rien de neuf quand il rêve dans la Recherche d'une « vie domestique » en terre batave. Les Pays-Bas, pour le voyageur français au XIXe, c'est le home sweet home.

  14. Aux marges du monde arabe

    Directory of Open Access Journals (Sweden)

    Hélène Thiollet

    2004-09-01

    Full Text Available L’étude des migrations contemporaines des Érythréens vers le Yémen au tournant des années quatre-vingt-dix permet d’observer les transformations des dynamiques régionales à l’œuvre dans le monde arabe. Les migrations sont un phénomène sensible aux différents aspects (politiques, économiques, culturels, géographiques de l’intégration régionale. Celle si est envisagée dans cet article à travers une approche doublement marginale : -la marginalité géographique de l’Érythrée arabo-africaine et du Yémen, économi­quement isolé dans la péninsule Arabique, -l’étude des migrations formelles et informelles, élément souvent marginal dans l’étude des institutions et des échanges qui constituent un système régional intégré. Cette étude est fondée sur une série d’entretiens menés au Yémen entre février et avril 2002 auprès des administrations yéménites et de la population érythréenne.

  15. A calibration system of O2 consumption and CO2 production for premature infants

    Science.gov (United States)

    Lin, Shih-Ching; Luo, Ching-Hsing; Yeh, Tsu-Fuh

    2001-03-01

    An apparatus to calibrate the system of measuring O2 consumption and CO2 production has been developed for premature infants. This system is based on the alcohol combustion principal. The alcohol combustion is used to test the indirect calorimetric system due to its simplicity and reliability. In the previous studies, the O2 consumption rate of alcoholic combustion is too large to simulate the breath of premature infants. A new design is proposed to burn alcohol continuously at a rate as low as 0.004 ml min-1, equivalent to an O2 consumption rate of only 3.9 ml min-1, a level in the breath range of preterms of about 660 g based on the measurement 5.9 ml kg-1 min-1. The alcohol combusts with various steady-state rates to imitate the breath of premature infants, and it is useful for a canopy open-circuit system. The calibration tool proposed here would be helpful in the clinical study of energy expenditure for preterms.

  16. Mercury Continuous Emmission Monitor Calibration

    Energy Technology Data Exchange (ETDEWEB)

    John Schabron; Eric Kalberer; Ryan Boysen; William Schuster; Joseph Rovani

    2009-03-12

    Mercury continuous emissions monitoring systems (CEMs) are being implemented in over 800 coal-fired power plant stacks throughput the U.S. Western Research Institute (WRI) is working closely with the Electric Power Research Institute (EPRI), the National Institute of Standards and Technology (NIST), and the Environmental Protection Agency (EPA) to facilitate the development of the experimental criteria for a NIST traceability protocol for dynamic elemental mercury vapor calibrators/generators. These devices are used to calibrate mercury CEMs at power plant sites. The Clean Air Mercury Rule (CAMR) which was published in the Federal Register on May 18, 2005 and vacated by a Federal appeals court in early 2008 required that calibration be performed with NIST-traceable standards. Despite the vacature, mercury emissions regulations in the future will require NIST traceable calibration standards, and EPA does not want to interrupt the effort towards developing NIST traceability protocols. The traceability procedures will be defined by EPA. An initial draft traceability protocol was issued by EPA in May 2007 for comment. In August 2007, EPA issued a conceptual interim traceability protocol for elemental mercury calibrators. The protocol is based on the actual analysis of the output of each calibration unit at several concentration levels ranging initially from about 2-40 {micro}g/m{sup 3} elemental mercury, and in the future down to 0.2 {micro}g/m{sup 3}, and this analysis will be directly traceable to analyses by NIST. The EPA traceability protocol document is divided into two separate sections. The first deals with the qualification of calibrator models by the vendors for use in mercury CEM calibration. The second describes the procedure that the vendors must use to certify the calibrators that meet the qualification specifications. The NIST traceable certification is performance based, traceable to analysis using isotope dilution inductively coupled plasma

  17. Chapitre XI. Normes familiales et usages du droit

    OpenAIRE

    Martin, Claude

    2015-01-01

    En analysant 24 configurations familiales recomposées, nous avons pu apprécier comment se différencient les attitudes à l’égard du droit en fonction du capital culturel, du projet conjugal et du degré ou du type de communication dans le réseau familial élargi. En effet, comme nous l’avons évoqué, il est possible de distinguer différents usages du droit : du point de vue du droit civil, soit les acteurs évitent d’y recourir et préfèrent des situations de fait qui correspondent à des accords né...

  18. Etude du comportement biogéochimique du carbone dans le lac Kivu au nord-ouest du Rwanda

    OpenAIRE

    Rwabuhungu Rwatangabo, Digne

    2008-01-01

    RésuméLe Rift Est-Africain comprend plusieurs grands lacs, dont le lac Kivu situé entre 1°34’et 2°30’ de latitude Sud et compris entre 28°50’ et 29°23’ de longitude Est. Ce lac,localisé au nord-ouest du Rwanda à la frontière avec la République Démocratique duCongo, présente une spécificité unique au monde: ses eaux profondes contiennentune gigantesque quantité de gaz dissous (3/4 de dioxyde de carbone (CO2), 1/4 degaz méthane (CH4)).Les études antérieures indiquent que les eaux du lac Kivu pr...

  19. Prise en charge du diabète gestationnel au niveau du service de maternité du CHU TLEMCEN

    OpenAIRE

    Chelef, Sidi Med Amine; Bouayad Agha, Selma

    2013-01-01

    A l'image du diabète de type2, la prévalence du diabète gestation nel ne cesse de croitre. Il s'agit d'un problème majeur auquel les praticiens se trouvent confrontés souvent. Le diabète gestationnel est une pathologie qui fait débat, tant de stratégies de dépistage, de diagnostic et de prise en charge ont été et sont encore discutées. Les résultats des études internationales, concernant notamment les chiffres de prévalence du diabète gestationnel et les conséquences m...

  20. Calorimetric and spectroscopic studies on solvation energetics for H2 storage in the CO2/HCOOH system.

    Science.gov (United States)

    Fink, Cornel; Katsyuba, Sergey; Laurenczy, Gabor

    2016-04-20

    Solvents playing a crucial role in many chemical reactions and additives can be used to shift the reaction equilibrium. Herein we study the enthalpy of mixing for selected solvents (aqueous, organic) and basic additives (amines, aqueous KOH) when mixed with formic acid with the aim to optimize hydrogen storage/delivery in the CO2/HCOOH system. Formic acid, resulting from carbon dioxide hydrogenation, reaches highest yields when effectively "removed" from the reaction equilibrium. In terms of energy efficiency, any heat released during CO2 hydrogenation has to be reused in the reverse reaction, during the production of hydrogen. In any scenario, the usage of basic chemicals, non-innocent solvents, causes higher energy release in CO2 hydrogenation, which has to be reused in the hydrogen delivery process. Therefore, the enthalpy of mixing is a valuable parameter for designing hydrogen storage devices since it allows the estimation of energy balance for the CO2 hydrogenation/H2 liberation cycle. The highest formic acid concentrations in direct catalytic CO2 hydrogenation under acidic conditions were reached in DMSO. DMSO exhibits considerably stronger interactions with formic acid compared to water as was observed in calorimetric measurements. This difference can be ascribed, at least partly, to stronger hydrogen bonding of FA to DMSO than to water in the corresponding solutions, examined by a combination of IR spectroscopic and quantum chemical studies. Furthermore, the investigation of DMSO/FA- and water/FA systems by (1)H- and (13)C-NMR spectroscopy revealed that only 1 : 1 aggregates are formed in the DMSO solutions of FA in a broad concentration range, while the stoichiometry and the number of the FA-water aggregates essentially depend on the concentration of aqueous solutions. PMID:26890151

  1. Thermomechanical and calorimetric behaviours of supported glass-forming films: A study based on thermodynamics with internal variables

    International Nuclear Information System (INIS)

    In order to understand the temperature-dependent response behaviour of thin thermoviscoelastic films which are deposited on relative stiff but thermally deformable substrates it is important to consider the lateral geometric constraints. They are generated by differences in the thermal expansion properties between the substrate and the film and provoke internal stresses. Since glass-forming materials exhibit distinct temperature history-dependent thermal expansion and calorimetric properties, primarily in the vicinity of the glass transition, the situation is rather complicated. In this article, a recently developed three-dimensional model of thermodynamics with internal variables is applied and adapted to simulate this type of behaviour. Explicit relations are obtained for the specific heat of the film, the normal strain and the lateral stresses. Numerical simulations demonstrate that the magnitude of the internal stress at temperatures below the glass transition depends strongly on the cooling rate. It is also shown that the specific heat of the supported film is principally different from the isobaric specific heat of the bulk material: the glassy limit of the specific heat of the film is reduced but the glass transition temperature is almost uninfluenced. The simulated behaviour is in accordance with experimental observations from literature. - Highlights: ► For the specific heat, stress and strain of the film, explicit equations were derived. ► The constraints of the substrate reduce the glassy limit of specific heat of the film. ► Glass transition temperatures of free bulk material and supported film are equal. ► Simulations are in good agreement with experimental observations from literature.

  2. Calorimetric investigation of triazole-bridged Fe(II) spin-crossover one-dimensional materials: measuring the cooperativity.

    Science.gov (United States)

    Roubeau, Olivier; Castro, Miguel; Burriel, Ramón; Haasnoot, Jaap G; Reedijk, Jan

    2011-03-31

    The relevance of abrupt magnetic and optical transitions exhibiting bistability in spin-crossover solids has been pointed out for their potential applications in optical or memory devices. In this respect, triazole-based one-dimensional coordination polymers are widely recognized as one of the most interesting systems. The measure of the interaction among spin-crossover centers at the origin of such cooperative behavior is of paramount importance and has so far been realized through modeling of spin-crossover curves derived mostly from magnetic measurements. Here, a new series of triazole-based one-dimensional coordination polymers of formula [Fe(Rtrz)(3)](A)(2)·xH(2)O with R = methoxyethyl and A = monovalent anion has been prepared that show complete and abrupt spin-crossover phenomenon as shown by magnetic measurements. The spin-crossover transition in these and related compounds is studied by differential scanning calorimetry, and the thermodynamic excess enthalpies and entropies associated with the phenomenon are derived systematically. Then the cooperative character of the spin-crossover in these materials is quantified by use of two widely used models, so-called Slichter and Drickamer and domain models. The same procedure is applied to spin-crossover curves of similar compounds available in the literature and for which calorimetric studies have been reported. The experimental thermodynamic figures, in particular the excess enthalpies, are shown to be clearly correlated to the output parameters of both models, thus providing a direct, experimental, quantitative measure of the cooperative character of the spin-crossover phenomenon. PMID:21381636

  3. Établissements recevant du public

    CERN Document Server

    2014-01-01

    Synthèse pour les installations électriques, des règles de sécurité contre les risques d’incendie et de panique dans les établissements recevant du public (ERP), selon l’arrêté du 25 juin 1980 modifié. L'ouvrage traite à la fois des dispositions communes aux établissements du 1er groupe (1ère à 4ème catégorie), du 2ème groupe (5ème catégorie) et des règles particulières applicables aux différents types d'établissements (structures d'accueil pour personnes âgées ou handicapées, hôtels, magasins de vente, restaurants et débit de boisson, établissements de soins, administration, châpiteaux, etc...) Sont ainsi notamment traités, dans le cadre des dispositions communes aux établissements du 1er groupe, pour les installations électriques normales : les installations des appareils, tableaux et canalisations, les locaux électriques et installation de machines, l'éclairage normal des locaux accessibles au public, le chauffage et la ventilation, l'installation d'eau chaude sanita...

  4. Assessment of low-flow water quality in the Du Page River, Illinois

    Science.gov (United States)

    Freeman, W.O.; Schmidt, A.R.; Stamer, J.K.

    1986-01-01

    The relations of several stream processes to concentrations of dissolved oxygen and other constituents during low-flow periods were evaluated for a 70.3-mile reach of the Du Page River in northeastern Illinois, using measured data and computer simulations. Reaeration rates and traveltimes were measured at various flow rates using a steady-state gas-tracer technique. Stream discharge, stage, temperature, and chemical constituent concentrations were measured during two 24-hour periods in July and August 1983. These data were used to describe water quality and to calibrate and verify the QUAL-II one dimensional, steady-state, water quality model. Dissolved oxygen concentrations did not meet the State water quality standards in several subreaches of the Du Page River. Concentrations were consistently below the State minimum dissolved oxygen standard in the downstream 8 miles of the East Branch Du Page River. Model simulations indicate that although ammonia oxidation played a role in the dissolved oxygen depletion, the primary factor was sediment oxygen demand. Other measured chemical constituents that did not comply with the State water quality standards in several subreaches of the river included ammonia, iron, fluoride, and total dissolved solids. (USGS)

  5. Astrid-2 EMMA Magnetic Calibration

    DEFF Research Database (Denmark)

    Merayo, José M.G.; Brauer, Peter; Risbo, Torben;

    1998-01-01

    magnetometer readings in each position were related to the field magnitudes from the Observatory, and a least squares fit for the 9 magnetometer calibration parameters was performed (3 offsets, 3 scale values and 3 inter-axes angles). After corrections for the magnetometer digital-to-analogue converters...... fit calibration parameters. Owing to time shortage, we did not evaluate the temperature coefficients of the flight sensor calibration parameters. However, this was done for an identical flight spare magnetometer sensor at the magnetic coil facility belonging to the Technical University of Braunschweig...

  6. Théories du nombre

    OpenAIRE

    Reynié, Dominique

    1988-01-01

    La naissance de l'État moderne est allée de pair avec l'apparition de son grand vis-à-vis : le nombre. Depuis l'émergence de la politique moderne, on trouve une pluralité de discours qui tentent de théoriser la place des masses dans la société civile et politique. Aux théories du XIXe siècle dominées par une crainte plus ou moins avouée du nombre, succèdent celles du XXe siècle qui le présentent au contraire comme le grand sujet de la domination. La mise en valeur de ce renversement de pro...

  7. Recherche sur les Juifs du Maroc

    OpenAIRE

    Michel Abitbol

    2008-01-01

    Le Centre de recherche sur les Juifs du Maroc (CRJM) a été créé, en mai 1994, à Paris à l’initiative de Monsieur Robert Assaraf, après de longs mois de concertations, de discussions et d’études préalables. Il s’agit d’une institution internationale, à vocation universitaire et scientifique qui s’est fixé pour but essentiel de développer, par tous les moyens, la connaissance et l’étude de l’histoire des Juifs du Maroc. Une histoire trois fois millénaire qui remonte à la destruction du premier ...

  8. Les Barthes, Labastide-du-Temple, Lizac

    OpenAIRE

    Hautefeuille, Florent

    2013-01-01

    Date de l'opération : 1991 (PR) Inventeur(s) : Hautefeuille Florent La prospection diachronique entreprise sur les trois communes avait pour but de déterminer l’importance de l’occupation humaine mais aussi d’envisager la restitution du couvert végétal au travers d’une esquisse d’archéologie du paysage. La zone couverte, plus de 3000 ha, s’insère dans un contexte géographique qui se situe autour de deux méandres du Tarn, entre sa confluence avec la Garonne et celle, plus en amont, avec l’Avey...

  9. L'épreuve du feu

    OpenAIRE

    Pécout, Roland

    2007-01-01

    Entre Causses et Cévennes au Nord, et plaine littorale au sud, les collines calcaires du Bas-Languedoc sont couvertes d'une formation végétale particulière, qui va de la lande au taillis, et du taillis à la forêt. Ces immenses étendues sèches, presque inhabitées, peuvent apparaître au premier regard comme le domaine d'une nature intacte... Ce sont pourtant des terres façonnées par l'usage agro-pastoral depuis fort longtemps, et qui ne sont redevenues « sauvages » que tout récemment. Age du cu...

  10. Aux sources de l'histoire du pays soninké : le cas du Kingi (Mali)

    OpenAIRE

    Chastanet, Monique

    1990-01-01

    Le livre de M. DIAWARA, La graine de la parole... dont il est question dans cet article, traite des différents types de traditions orales historiques de l'Etat du Kingi, du 15ème au milieu du 19ème siècle. Il met en rapport leurs fonctions socio-politiques avec les transformations de cette société et analyse leurs modes de transmission, plus ou moins formalisés. Cette étude concerne aussi bien les traditions familiales que celles des spécialistes et souligne, notamment, le rôle des femmes et ...

  11. The calibration of radioprotection hardware

    International Nuclear Information System (INIS)

    After having recalled recent recommendations on dose limits on the basis of two radioprotection values (the equivalent and the efficient dose), this document indicates some characteristics of these values, and discusses how they are applied for individual monitoring and for area or ambient monitoring. It presents conventions aimed at simplifying radiation fields. Then, the author gives a precise overview of some general aspects concerning calibration operations: legal requirements, radioprotection hardware controls, calibration loop organisation (calibration definition, general physical values, reference radiation, conversion factors, and metrology), comparison between operational values and the protection value (irradiation geometries, conversion factors with respect to the geometries, comparison between efficient dose and operational values). He finally describes the calibration procedures: dosemeter location, energy response, angular response, flow rate response, uncertainties

  12. On chromatic and geometrical calibration

    DEFF Research Database (Denmark)

    Folm-Hansen, Jørgen

    1999-01-01

    The main subject of the present thesis is different methods for the geometrical and chromatic calibration of cameras in various environments. For the monochromatic issues of the calibration we present the acquisition of monochrome images, the classic monochrome aberrations and the various sources...... of non-uniformity of the illumination of the image plane. Only the image deforming aberrations and the non-uniformity of illumination are included in the calibration models. The topics of the pinhole camera model and the extension to the Direct Linear Transform (DLT) are described. It is shown how...... the correct interpolation method is described. For the chromatic issues of calibration we present the acquisition of colour and multi-spectral images, the chromatic aberrations and the various lens/camera based non-uniformities of the illumination of the image plane. It is described how the...

  13. Calibration of "Babyline" RP instruments

    CERN Document Server

    2015-01-01

      If you have old RP instrumentation of the “Babyline” type, as shown in the photo, please contact the Radiation Protection Group (Joffrey Germa, 73171) to have the instrument checked and calibrated. Thank you. Radiation Protection Group

  14. Du karma aux planètes

    OpenAIRE

    Coderey, Céline

    2012-01-01

    En Arakan, les conceptions de la maladie et les pratiques thérapeutiques relevant du bouddhisme theravāda, de l’astrologie, du culte des esprits, de la médecine et de bien d’autres domaines forment un ensemble signifiant et hiérarchisé. Ensemble signifiant parce que malades et thérapeutes considèrent ces conceptions et pratiques comme indissociables les unes des autres et devant donc être combinées afin de mener à bien le processus de guérison. Ensemble hiérarchisé car, à l’intérieur de celui...

  15. Présentation du dossier

    OpenAIRE

    2008-01-01

    L’objet du présent dossier est d’interroger des pratiques d'entretiens qui visent l'élucidation et la conscientisation par l'apprenant de son propre fonctionnement mental en situation d'apprentissage. Cette réflexion vise à confronter trois approches, certes différentes, mais qui poursuivent des finalités voisines et pourraient s'avérer complémentaires : celle du dialogue pédagogique, pratiqué en gestion mentale, celle de l’entretien de type critique, inspiré des travaux de Jean Piaget, et en...

  16. Technostress et autres revers du travail nomade

    OpenAIRE

    Popma, J.

    2013-01-01

    L'Internet et l'utilisation des ordinateurs portables, des téléphones mobiles et des tablettes ont accru l'importance du « travail nomade». Ce type de travail, sans contrainte de lieu ni de temps, peut entraîner, d’après ce working paper, une plus grande autonomie et une plus grande flexibilité pour les travailleurs, mais il comporte néanmoins de sérieux risques aussi bien physiques que psychosociaux. L'auteur de ce rapport met l'accent sur ​​les dangers cachés du travail nomade : technostres...

  17. Rotary mode system initial instrument calibration

    Energy Technology Data Exchange (ETDEWEB)

    Johns, B.R.

    1994-10-01

    The attached report contains the vendor calibration procedures used for the initial instrument calibration of the rotary core sampling equipment. The procedures are from approved vendor information files.

  18. Rotary mode system initial instrument calibration

    International Nuclear Information System (INIS)

    The attached report contains the vendor calibration procedures used for the initial instrument calibration of the rotary core sampling equipment. The procedures are from approved vendor information files

  19. Beam Imaging and Luminosity Calibration

    CERN Document Server

    AUTHOR|(CDS)2081126; Klute, Markus; Medlock, Catherine Aiko

    2016-01-01

    We discuss a method to reconstruct two-dimensional proton bunch densities using vertex distributions accumulated during LHC beam-beam scans. The x-y correlations in the beam shapes are studied and an alternative luminosity calibration technique is introduced. We demonstrate the method on simulated beam-beam scans and estimate the uncertainty on the luminosity calibration associated to the beam-shape reconstruction to be below 1%.

  20. CERI: Ionizing Radiation Calibration Centre

    International Nuclear Information System (INIS)

    The CERI has been granted by the National Bureau of Metrology (BNM) as an Ionizing Radiation Calibration Centre and as an Estimation and Qualification Centre for the ionizing radiation measurement devices. This article gives some information on the scope covered by the BNM's grant and on the various equipment on which the laboratory relies. It describes the calibration and estimation activities and mentions many kinds of services which are offered to the users mainly in the medical and industrial fields

  1. The Third VLBA Calibrator Survey

    OpenAIRE

    Petrov, L.; Kovalev, Y. Y.; Fomalont, E.; Gordon, D

    2004-01-01

    This paper presents the third extension to the Very Large Baseline Array (VLBA) Calibrator Survey, containing 360 new sources not previously observed with very long baseline interferometry (VLBI). The survey, based on three 24 hour VLBA observing sessions, fills the areas on the sky above declination -45 degrees where the calibrator density is less than one source within a 4 degrees radius disk at any given direction. The positions were derived from astrometric analysis of the group delays de...

  2. Pressures Detector Calibration and Measurement

    CERN Document Server

    Kumara, I Made Gita

    2016-01-01

    This is report of my first and second projects (of 3) in NA61. I did data taking and analysis in order to do calibration of pressure detectors and verified it. I analyzed the data by ROOT software using the C ++ programming language. The first part of my project was determination of calibration factor of pressure sensors. Based on that result, I examined the relation between pressure drop, gas flow rate of in paper filter and its diameter.

  3. Method for the study of the inelastic cross section for high energy protons by means of shower arrays with the large calorimetric area

    International Nuclear Information System (INIS)

    Proton initiated showers could be reliably separated from showers initiated by cosmic ray nuclei by means of arrays with large calorimetric area, using distributions of energy fractions for EAS electromagnetic muon and hadron components. Proton initiated showers penetrate deeper into the atmosphere and have relatively lower energy fraction in muons. Distribution of that energy fraction is sensitive to the value of the proton inelastic cross section. It is shown that the analysis of this distribution allows one distinguish between log sup 2 S -rise and log S -rise of the cross section at energies above 10 to the 15th power eV

  4. In-Plane Thermal Diffusivity Measurement of Thin Films Based on the Alternating-Current Calorimetric Method Using an Optical Reflectivity Technique

    Institute of Scientific and Technical Information of China (English)

    黄正兴; 唐祯安; 许自强; 丁海涛; 顾毓沁

    2004-01-01

    An advanced ac calorimetric method to measure thermal diffusivity of a thin sample is developed by using an optical reflectivity technique. A modulated infrared laser is used to heat the front surface ofa foil specimen. The reflectivity of a continuous-wave He-Ne laser at the rear surface of the specimen is detected by a photoreceiver.According to the temperature dependence of reflectivity, the ac temperature response is obtained. Thermal diffusivity is deduced from a one-dimensional heat conduction equation. A stainless-steel foil and a copper foil are chosen as the samples. The present results agree well with the data in the literature.

  5. WFC3: UVIS Dark Calibration

    Science.gov (United States)

    Bourque, Matthew; Biretta, John A.; Anderson, Jay; Baggett, Sylvia M.; Gunning, Heather C.; MacKenty, John W.

    2014-06-01

    Wide Field Camera 3 (WFC3), a fourth-generation imaging instrument on board the Hubble Space Telescope (HST), has exhibited excellent performance since its installation during Servicing Mission 4 in May 2009. The UVIS detector, comprised of two e2v CCDs, is one of two channels available on WFC3 and is named for its ultraviolet and visible light sensitivity. We present the various procedures and results of the WFC3/UVIS dark calibration, which monitors the health and stability of the UVIS detector, provides characterization of hot pixels and dark current, and produces calibration files to be used as a correction for dark current in science images. We describe the long-term growth of hot pixels and the impacts that UVIS Charge Transfer Efficiency (CTE) losses, postflashing, and proximity to the readout amplifiers have on the population. We also discuss the evolution of the median dark current, which has been slowly increasing since the start of the mission and is currently ~6 e-/hr/pix, averaged across each chip. We outline the current algorithm for creating UVIS dark calibration files, which includes aggressive cosmic ray masking, image combination, and hot pixel flagging. Calibration products are available to the user community, typically 3-5 days after initial processing, through the Calibration Database System (CDBS). Finally, we discuss various improvements to the calibration and monitoring procedures. UVIS dark monitoring will continue throughout and beyond HST’s current proposal cycle.

  6. Gestion du problème de changement climatique

    OpenAIRE

    Nefzi Bouzidi, Aida

    2009-01-01

    De la science du changement climatique aux estimations de ses impacts, le problème du changement climatique se caractérise surtout par la présence de grandes incertitudes. C'est pourquoi nous formulerons la question principale de notre article: comment tenir compte des incertitudes dans la décision de prévenir le changement climatique ? L'économie de l'environnement et des ressources naturelles nous aiderait à dessiner la portée du problème de gestion du problème du changement climatique et n...

  7. L'évolution du peuplement sudarabique du Ier au VIe siècle

    OpenAIRE

    Schiettecatte, Jérémie

    2008-01-01

    Cette contribution s'arrête sur la question suivante : un déclin du peuplement s'observe-t-il en Arabie du Sud à la veille de l'islam ? Et si tel est le cas, comment l'expliquer ? Le traitement cartographique des données nous permet dans un premier temps d'observer l'évolution du réseau urbain sudarabique. Celui-ci semble s'étioler. Dans un second temps, la documentation est considérée d'un point de vue critique, afin de cerner dans quelle mesure une diminution de la densité du réseau urbain ...

  8. Johannes Angermuller, Analyse du discours poststructuraliste. Les voix du sujet chez Lacan, Althusser, Foucault, Derrida, Sollers

    OpenAIRE

    Guilhaumou, Jacques

    2014-01-01

    Si l’approche foucaldienne du discours apparaît quelque peu hybride au regard des développements récents en pragmatique du discours, il n’en reste pas moins que Johannes Angermuller y voit, au titre de l’accent mis dans L’archéologie du savoir sur l’instance de l’événement énonciatif, un modèle interprétatif propice à une compréhension globale du champ de l’analyse de discours, donc de sa construction par étapes au cours des années soixante-dix / quatre-vingt. En effet, le point de vue foucal...

  9. Figurations du crime, figurations du lieu commun de la littérature moderne

    OpenAIRE

    Daros, Philippe

    2015-01-01

    Peut-être de façon générale est-on en droit de suggérer une double polarité, absolument dialectique d’ailleurs, sur les figurations du roman du crime. Selon la première, historiquement constitutive de ce sous-genre romanesque, le crime, comme événement fictionnel fondateur du muthos, est le support même de la représentation comme configuration d’un ordre du monde interprétable par la raison et, je le suppose, Hegel aurait été grand consommateur de cette littérature où le sujet non maître de s...

  10. Valeur du PSA dans le diagnostic du cancer de prostate à Mbujimayi, RD Congo

    Directory of Open Access Journals (Sweden)

    Ngandu TJ

    2015-12-01

    Full Text Available RESUME Objectif Evaluer l’apport du dosage du PSA au diagnostic du cancer de prostate à Mbujimayi Matériel et Méthodes Nous avons menée une étude prospective et analytique à l’hôpital Bonzola sur 40 patients ayant accepté une biopsie prostatique sur la base d’une anomalie de la prostate au toucher rectal et/ou du résultat du dosage du PSA ≥4ng/ml. Les examens anatomopathologiques ont été réalisés aux Cliniques Universitaires de Kinshasa avec un contrôle de qualité incluant l’immunohistochimie (IHC au Centre Hospitalier de Chambéry (France. Résultats L’âge moyen des patients était de 59,13 ans (57,9-60,4. L’âge ≥ 60 ans a influencé significativement le résultat du dosage du PSA (p=0,032, plus souvent pathologique (81,8 %. La majorité des patients (68,4% avec prostate suspecte de malignité au toucher rectal, avaient un PSA normal. Les patients avec hypertrophie bénigne prostatique (histopathologie Kinshasa présentaient autant de PSA ≥ 4 ng/ml qu’inférieur à ce seuil. Au contrôle histopathologique et immunohistochimique de Chambéry, 12 patients avec hypertrophie bénigne de la prostate présentaient un PSA ≥ 4ng/ml (66,6 %. Les 2 cas de cancer et un cas de PIN sur deux présentaient un PSA pathologique. Conclusion L’augmentation du PSA au-delà du seuil de 4 ng/ml a été rencontrée dans des situations cliniques et histopathologiques variées et ne peut constituer isolément une base suffisante pour le diagnostic de cancer de la prostate. Toutefois, elle demeure un paramètre important de détection du cancer de prostate et appelle la réalisation des biopsies prostatiques de confirmation

  11. L’ombre du Condor

    Directory of Open Access Journals (Sweden)

    Franck Gaudichaud

    2003-09-01

    Full Text Available Si l’on observe aujourd’hui, avec un regard d’historien, le Cône Sud à la fin des années soixante soixante-dix et que par, la suite, on tourne une page de quelques années, pour fixer la même partie du monde, le constat est sans appel : le sous-continent latino-américain est passé, en général, d’une phase de forte mobilisation et politisation sociale, montée en puissance de partis et organisations révolutionnaires, surgissements de gouvernements populistes de gauche ou progressistes – appelant à une rupture avec l’impérialisme –, à un reflux généralisé du mouvement ouvrier, une ère de violence politique étatisée, la destruction massive de tous les espaces d’expression et de participation démocratiques, l’écrasement physique et idéologique sans relâche des militants et mouvements révolutionnaires, la mise en place de modèles économiques capitalistes dirigistes puis/ou néolibéraux. Que s’est-il passé ? Quel fil conducteur a été rompu et par quels moyens l’Amérique Latine a été conduite à ce reflux des luttes sociales ? Pour répondre à cette question, nous nous contenterons dans cet article de focaliser notre objectif sur un aspect spécifique et essentiel de ce retournement de tendance que vit alors l���Amérique Latine : celui de la mise en place d’un terrorisme d’Etat contre-révolutionnaire transnational, appuyé par l’impérialisme américain, nommé « l’Opération Condor ». Dans cet article, il s’agit de montrer le fonctionnement d’un terrorisme hégémonique dont l’impact sur les sociétés latino-américaines est considérable en termes de destruction du mouvement social, des activités culturelles et de l’ensemble de la vie sociale et politique qui restent marquées, encore aujourd’hui à des degrés divers, par la violence, la peur et l’atomisation structurelle.Si miramos hoy en día, desde una perspectiva histórica, el Cono Sur hacia finales de

  12. OGM : vers une définition commune du contenu du problème ?

    Directory of Open Access Journals (Sweden)

    Icart Jean-Claude

    2001-07-01

    Full Text Available Les divergences croissantes depuis des années entre experts, responsables économiques, et acteurs sociaux et « citoyens » au sujet des OGM, ont pu être analysées à juste titre, comme exprimant la difficulté de dégager une « définition commune du contenu du problème »1.

  13. Trophic relay and prey switching - A stomach contents and calorimetric investigation of an ambassid fish and their saltmarsh prey

    Science.gov (United States)

    McPhee, Jack J.; Platell, Margaret E.; Schreider, Maria J.

    2015-12-01

    Trophic relay is an ecological model that involves the movement of biomass and energy from vegetation, such as saltmarshes, within estuaries to the open sea via a series of predator-prey relationships. Any potential for trophic relay is therefore affected by water movements within an estuary and by the ability of a predator to "switch" prey in response to fluctuating abundances of those prey. Saltmarsh-dwelling grapsid crabs, which feed on saltmarsh-derived detritus and microphytobenthos, release zoeae into ebbing tides that inundate saltmarshes during spring-tide cycles within tidally-dominated estuaries, such as Brisbane Water Estuary, therefore providing an opportunity to examine whether prey-switching and/or trophic relay may occur in fish that feed on those zoeae (such as the highly abundant estuarine ambassid, Ambassis jacksoniensis). This model was examined by sampling A. jacksoniensis near saltmarshes in a large, temperate south-eastern Australian estuary during flood and ebb tides on days of saltmarsh inundation and non-inundation over four spring-tide events in 2012. Stomach fullnesses of A. jacksoniensis were generally highest during ebb tides on days of saltmarsh inundation, implying that feeding was most marked at these times. Caridean decapods dominated diets during flood tides and on days of no saltmarsh inundation, while crab zoeae dominated diets during ebb tides and on days of inundation, suggesting that, when saltmarsh-derived zoeae became abundant, A. jacksoniensis switched to feeding on those prey. Three potential zooplankton prey (calanoid copepods, caridean decapods and crab zoeae) did not differ calorimetrically, indicating that switching of prey by A. jacksoniensis is not directly related to their preying on energetically greater prey, but reflects opportunistic feeding on more abundant and/or less elusive prey. As A. jacksoniensis is able to switch prey from estuarine caridean decapods to saltmarsh-derived crab zoeae, this very abundant

  14. Georges Perec: topographies parisiennes du flâneur

    Directory of Open Access Journals (Sweden)

    Annelies Schulte Nordholt

    2008-02-01

    Full Text Available Dans cet article, la sociologie de la vie quotidienne de Perec est vue à travers la figure du flâneur, si typique de l’imaginaire littéraire parisien du XIXe siècle. De quelle manière l’évolution du flâneur – du « botaniste de l’asphalte » à l’homme des foules de Baudelaire et de Poe – peut-elle éclairer les multiples figures du flâneur perecquien ? C’est ce que nous verrons en analysant successivement les figures du flâneur immobile, dans Tentative d’épuisement d’un lieu parisien et du flâneur éternellement en marche qu’est le protagoniste d’Un homme qui dort.

  15. Note : Vierges de pitié du Lot

    OpenAIRE

    Castan, Félix-Marcel

    2013-01-01

    À l’initiative du Secrétariat départemental des Objets mobiliers du Lot, durant l’été 80, dans le Grenier du Chapitre de la Cathédrale de Cahors, une belle exposition a rassemblé les résultats d’une enquête de Mil,) Monique Escat, Conservateur adjoint, sur les Vierges de Pitié qui ont commencé à apparaître en Quercy à la fin du xvie siècle. En tête du catalogue, un commentaire du Professeur Marcel Durliat, de l’Université de Toulouse Le Mirail, synthétise les conclusions actuelles du point de...

  16. Dans le grand collisionneur du CERN

    CERN Document Server

    Campanelli, Mario

    2014-01-01

    Ce livre fait pénétrer le lecteur non initié dans l’instrument scientifique le plus grand du monde. D’ailleurs, le web fut précisément inventé à Genève en vue d’une collaboration aussi gigantesque. Résultat de vingt ans de recherche, le LHC, Grand collisionneur de hadrons, est l’anneau de 26,7 km creusé sous la frontière francosuisse, où sont accélérés, en sens opposés, des paquets de particules jusqu’à des vitesses et des énergies extrêmes. Ainsi la physique s’est-elle engagée dans une étape nouvelle de nos connaissances. Après les grandes découvertes de l’univers et de la réalité microscopique du siècle dernier, le collisionneur nous fait progresser aujourd’hui dans un «nuage de probabilités» aux frontières de l’antimatière. Dans une bousculade de particules, voici le champ convoité du boson de Higgs. Mario Campanelli, professeur associé à l’Université de Londres et collaborateur au projet ATLAS du LHC, propose, dans cet ouvrage, de s’introduire pas �...

  17. La Carte du Ciel vue de Potsdam

    Science.gov (United States)

    Bigg, C.

    2008-06-01

    Ce chapitre s'attache à retracer les aléas de la Carte du Ciel depuis l'Observatoire de Potsdam. Le cas de cet établissement sert de point de comparaison avec les observatoires français, en particulier en ce qui concerne l'organisation du travail au sein de l'Observatoire et le problème de la répartition des ressources humaines et instrumentales dans la poursuite de ce projet de longue haleine. On remarque notamment que si les astronomes allemands, héritiers d'une tradition d'excellence en astrométrie stellaire, se devaient de prendre part à la "Photographische Himmelskarte", ce ne sont pas les observatoires d'astronomie classique mais le nouvel observatoire d'astrophysique de Potsdam qui entreprendra cette tâche. Les études effectuées dans ce cadre sur la photographie stellaire et surtout la photométrie photographique seront ainsi considérées comme des contributions à la jeune science astrophysique - du moins jusqu'à ce que la Carte du Ciel entre en concurrence dans l'Observatoire avec les projets de catalogues de spectres stellaires et de mesure des vitesses radiales.

  18. Experimental reproducibility analysis in DU hydriding

    Energy Technology Data Exchange (ETDEWEB)

    Koo, Daeseo; Park, Jongcheol; Chung, Hongsuk [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)

    2014-10-15

    A storage and delivery system (SDS) is used for storing hydrogen isotopes as a metal hydride form. The rapid hydriding of tritium is very important not only for safety reasons but also for the economic design and operation of the SDS. For the storage, supply, and recovery of hydrogen isotopes, depleted uranium (DU) has been extensively proposed. To develop nuclear fusion technology, it will be necessary to store and supply hydrogen isotopes needed for Tokamak operation. The experimental reproducibility of bed temperature on DU hydriding was also analyzed. The experimental reproducibility of apparatus was acceptable for all the experiments. The experimental reproducibility of tank pressure on DU hydriding was analyzed. As the hydriding performs, the tank pressure showed decreasing trend. The experimental reproducibility of bed temperature on DU hydriding was also analyzed. As the hydriding performs, the bed temperatures increased up to maximum temperature with exothermic reaction and then they showed decreasing trend. The experimental reproducibility of apparatus was acceptable for all the experiments.

  19. Etude des phenomenes dynamiques ultrarapides et des caracteristiques impulsionnelles d'emission terahertz du supraconducteur YBCO

    Science.gov (United States)

    Savard, Stephane

    Les premieres etudes d'antennes a base de supraconducteurs a haute temperature critique emettant une impulsion electromagnetique dont le contenu en frequence se situe dans le domaine terahertz remontent a 1996. Une antenne supraconductrice est formee d'un micro-pont d'une couche mince supraconductrice sur lequel un courant continu est applique. Un faisceau laser dans le visible est focalise sur le micro-pont et place le supraconducteur dans un etat hors-equilibre ou des paires sont brisees. Grace a la relaxation des quasiparticules en surplus et eventuellement de la reformation des paires supraconductrices, nous pouvons etudier la nature de la supraconductivite. L'analyse de la cinetique temporelle du champ electromagnetique emis par une telle antenne terahertz supraconductrice s'est averee utile pour decrire qualitativement les caracteristiques de celle-ci en fonction des parametres d'operation tels que le courant applique, la temperature et la puissance d'excitation. La comprehension de l'etat hors-equilibre est la cle pour comprendre le fonctionnement des antennes terahertz supraconductrices a haute temperature critique. Dans le but de comprendre ultimement cet etat hors-equilibre, nous avions besoin d'une methode et d'un modele pour extraire de facon plus systematique les proprietes intrinseques du materiau qui compose l'antenne terahertz a partir des caracteristiques d'emission de celle-ci. Nous avons developpe une procedure pour calibrer le spectrometre dans le domaine temporel en utilisant des antennes terahertz de GaAs bombarde aux protons H+ comme emetteur et detecteur. Une fois le montage calibre, nous y avons insere une antenne emettrice dipolaire de YBa 2Cu3O7-delta . Un modele avec des fonctions exponentielles de montee et de descente du signal est utilise pour lisser le spectre du champ electromagnetique de l'antenne de YBa 2Cu3O7-delta, ce qui nous permet d'extraire les proprietes intrinseques de ce dernier. Pour confirmer la validite du modele

  20. Dynamic fuzzy c-means (dFCM) clustering and its application to calorimetric data reconstruction in high-energy physics

    International Nuclear Information System (INIS)

    In high-energy physics experiments, calorimetric data reconstruction requires a suitable clustering technique in order to obtain accurate information about the shower characteristics such as the position of the shower and energy deposition. Fuzzy clustering techniques have high potential in this regard, as they assign data points to more than one cluster, thereby acting as a tool to distinguish between overlapping clusters. Fuzzy c-means (FCM) is one such clustering technique that can be applied to calorimetric data reconstruction. However, it has a drawback: it cannot easily identify and distinguish clusters that are not uniformly spread. A version of the FCM algorithm called dynamic fuzzy c-means (dFCM) allows clusters to be generated and eliminated as required, with the ability to resolve non-uniformly distributed clusters. Both the FCM and dFCM algorithms have been studied and successfully applied to simulated data of a sampling tungsten–silicon calorimeter. It is seen that the FCM technique works reasonably well, and at the same time, the use of the dFCM technique improves the performance.

  1. Evaluation of quality assurance calibration results based on repeated calibrations

    International Nuclear Information System (INIS)

    To ensure quality assurance of the calibration results, as indicated by the UNE-EN ISO / IEC 17025:2005 in paragraph 5.9, the laboratory has established procedures for quality control of its activity. Thus, the laboratory participates in both inter-laboratory intercomparison exercises, cycle through the entire range of radiation qualities reflected in the scope of its accreditation, such as intra-laboratory intercomparison exercises. In this case, repeat quarterly by two different operators both the calibration of an ionization chamber irradiation of a direct reading personal dosimeter.

  2. Calorimetric analysis of photopolymerization

    International Nuclear Information System (INIS)

    This review is divided into several sections. The first section establishes the basis for measurement of the heat evolution during polymerization by focusing on the chemical chain process that results in the exothermic production of heat. The second section describes the types of photocalorimeters and the methods and instrumentation involved in exothermic measurements. Considerable attention is given to the use of the differential scanning calorimeter to record the exothermic curves generated by photopolymerization of monofunctional and multifunctional monomers. The final section presents a thorough coverage of the results obtained by a large number of research groups using photocalorimetric measurements to provide a more accurate description of polymerization processes. 120 refs., 51 figs., 14 tabs

  3. Calorimetric measuring systems

    DEFF Research Database (Denmark)

    Ritchie, Andrew Ewen; Pedersen, John Kim; Blaabjerg, Frede;

    2004-01-01

    system. If the switching speed can be increased, improvements may be possible (e.g., current ripple in an electrical machine or physical size of passive components may be reduced). On the other hand, increased switching speed may cause additional losses in a power electronic system and increase the...... increasing the switching frequency electrically because the system efficiency is high and a pure input-output measurement gives an unsatisfactory resolution and accuracy.......Power Electronics remains an emerging technology. New materials, new devices, and new circuit topologies reduce the cost, weight, and volume for important applications [1]. Two important factors in power electronic circuits are the switching speed of the devices and the total power losses in the...

  4. The KLOE Online Calibration System

    Institute of Scientific and Technical Information of China (English)

    E.Pasqualucci

    2001-01-01

    Based on all the features of the KLOE online software,the online calibration system performs current calibration quality checking in real time and starts automatically new calibration procedures when needed.Acalibration manager process controls the system,implementing the interface to the online system,receiving information from the run control and translating its state transitions to a separate state machine.It acts as a " calibration run controller"and performs failure recovery when requested by a set of process checkers.The core of the system is a multi-threaded OO histogram server that receives histogramming commands by remote processes and operates on local ROOT histograms.A client library and C,fortran and C++ application interface libraries allow the user to connect and define his own histogram or read histograms owned by others using an bool-like interface.Several calibration processes running in parallel in a destributed,multiplatform environment can fill the same histograms,allowing fast external information check.A monitor thread allow remote browsing for visual inspection,Pre-filtered data are read in nonprivileged spy mode from the data acquisition system via the Kloe Integrated Dataflow,privileged spy mode from the data acquisiton system via the Kole Integrated Dataflow.The main characteristics of the system are presented.

  5. Esquisse du parlementarisme et du monopartisme en Afrique: le cas du Togo

    Directory of Open Access Journals (Sweden)

    E. A. B. van Rouveroy van Nieuwaal

    1989-01-01

    Full Text Available Witnessed the last hundred years profound political and constitutional changes. In this respect there are many differences between African States depending on which kind of colonial overlord has been the ruling power. The African State was a juridical entity in international law, but was it also, at the time of independence, an empirical entity in national fact?In almost all cases the empirical reality as a functioning government was still primarily the presence of European bureaucrats who has embodied the colonial state. Independence therefore opened a gap between the international legitimacy and the internal marginality of many emergent African State. The gap often presented a real political dilemma to the new African rulers: they usually could retain European officials only by compromising their national independence and could dispense with them only at the risk of undermining governmental performance. After adoption of European constitutional law and with, initially, a high degree of similarity between most constitutions in French-speaking Africa, nowadays these constitutions differ widely, contrary to the Commonwealth Africa that has experienced fewer innovations and constitutional breakdowns.Parliamentary systems of government gave way to One Party Systems, introduced in many cases by the national army, as the best equiped, trained, paid and organised power in the country. This has been the political and constitutional development in Togo as well. Since 1969, it has a One Party System, the Rassemblement du Peuple Togolais, founded by the President of the Togolese Republic, Gen. Gnassingbé Eyadéma. But, as everywhere else, doubts are growing about the effectiveness of the One Party System. Are the Togolese perspectives such that Eyadéma is willing to have an open mind and to be all ears for the critics to his own creation? Another intriguing question is to know in which way the Africantraditional authorities (" chieftancy", as the core

  6. Facility for dosimetric instrument calibration

    International Nuclear Information System (INIS)

    A structure is designed consisting of a rotary support of containers with radiation sources and of a rotary plug mounted above the sources. A support post with a slide rest and arms rotating around the post longitudinal axis is mounted in the centre of the container support. THe arms support instruments to be calibrated. The colimation cone of the respective source is directed to the tensor of the instrument being calibrated. The slide rest is balanced using a counterpoise mounted in the support post. Sources are not removed from the containers in source change during measurement. The support can hold more containers and the slide rest can support more instruments to be calibrated than the existing configurations. (M.D.). 2 figs

  7. Radiation protection dosimetry and calibrations

    International Nuclear Information System (INIS)

    At the SCK-CEN different specialised services are delivered for a whole range of external and internal customers in the radiation protection area. For the expertise group of radiation protection dosimetry and calibrations, these services are organized in four different laboratories: dosimetry, anthropogammametry, nuclear calibrations and non-nuclear calibrations. The services are given by a dedicated technical staff who has experience in the handling of routine and specialised cases. The scientific research that is performed by the expertise group makes sure that state-of-the-art techniques are being used, and that constant improvements and developments are implemented. Quality Assurance is an important aspect for the different services, and accreditation according national and international standards is achieved for all laboratories

  8. The Third VLBA Calibrator Survey

    CERN Document Server

    Petrov, L A; Fomalont, E; Gordon, D

    2005-01-01

    This paper presents the third extension to the Very Large Baseline Array (VLBA) Calibrator Survey, containing 360 new sources not previously observed with very long baseline interferometry (VLBI). The survey, based on three 24 hour VLBA observing sessions, fills the areas on the sky above declination -45 deg where the calibrator density is less than one source within a 4 deg radius disk at any given direction. The positions were derived from astrometric analysis of the group delays determined at 2.3 and 8.4 GHz frequency bands using the Calc/Solve package. The VCS3 catalogue of source positions, plots of correlated flux density versus the length of projected baseline, contour plots and fits files of naturally weighted CLEAN images as well as calibrated visibility function files are available on the Web at http://gemini.gsfc.nasa.gov/vcs3

  9. Performance standard for dose Calibrator

    CERN Document Server

    Darmawati, S

    2002-01-01

    Dose calibrator is an instrument used in hospitals to determine the activity of radionuclide for nuclear medicine purposes. International Electrotechnical Commission (IEC) has published IEC 1303:1994 standard that can be used as guidance to test the performance of the instrument. This paper briefly describes content of the document,as well as explains the assessment that had been carried out to test the instrument accuracy in Indonesia through intercomparison measurement.Its is suggested that hospitals acquire a medical physicist to perform the test for its dose calibrator. The need for performance standard in the form of Indonesia Standard is also touched.

  10. Le corps du Prophète

    Directory of Open Access Journals (Sweden)

    Denis Gril

    2006-11-01

    Full Text Available La relation du corps au sacré est double : il en reçoit la marque et en reflète la présence. Le Prophète de l’islam est marqué dès sa naissance par les signes de son élection et plus encore par les effets sensibles de la Révélation. Si dans son intimité, il doit rester voilé, le corps du Prophète, par son caractère exceptionnel, témoigne de sa mission. Doué de facultés miraculeuses, son corps, décrit dans ses moindres détails, atteste sa perfection. Les Compagnons l’entourent d’une vénération extrême ; l’embrasser et même en absorber les excrétions sont gage de salut. La portée eschatologique du contact avec ce corps sacré et parfumé, explique que, de son vivant, des parties de lui comme la sueur ou les cheveux, sont conservées comme reliques. Le statut du corps prophétique mort, mais toujours vivant, comme celui des martyrs, anticipe pour l’ensemble des croyants le corps transposé, illuminé dans l’au-delà. Réceptacle de la Parole et donc de la Présence divine, le corps du Prophète est sacralisé par son union parfaite avec l’Esprit. Parmi les hommes, les saints, héritiers en esprit des prophètes, portent dans leur corps les effets bénéfiques et lumineux de cet héritage. En islam, comme dans toute tradition religieuse et spirituelle, l’étude des rapports entre le corps et le sacré nécessite donc un retour au modèle du fondateur.

  11. Calorimetric Study of Phase Stability and Phase Transformation in U- xZr ( x = 2, 5, 10 wt pct) Alloys

    Science.gov (United States)

    Rai, Arun Kumar; Subramanian, Raju; Hajra, Raj Narayan; Tripathy, Haraprasanna; Rengachari, Mythili; Saibaba, Saroja

    2015-11-01

    A comprehensive calorimetric study of high-temperature phase equilibria and phase transformation characteristics in U- xZr ( x = 2, 5, 10 wt pct) alloys has been undertaken, as a function of heating and cooling rates. It is found that the following sequence of phase transformation takes place upon slow heating in annealed U-2 wt pct Zr alloy: α + α' + δ-UZr2 → α + γ 2 → β + γ 2 → β + γ 1 → γ. For alloys of 5 and 10 wt pct Zr, the additional presence of a miscibility gap ( γ 1 U-rich bcc + γ 2 Zr-rich bcc) in the high-temperature γ(bcc) phase region resulted in the following transformation sequence: α + α' + δ-UZr2 → α + γ 2 → β + γ 2 → γ 1 + γ 2 → γ. Further, it has been demonstrated that depending on the nature of starting microstructure, namely whether it is α eq + δ-UZr2, or a mix of α' + α eq + δ-UZr2 phases, the relative extents of two possible co-occurring modes of the first on-heating phase transformation step differ. In case of starting microstructure having mixture of three phases α' + α eq + δ-UZr2, it is found that α'-martensite relaxation via α' + α eq + δ-UZr2 → α eq + δ-UZr2 constitutes the first on-heating thermal response. The α'-martensitic relaxation is very closely followed by the dissolution of δ-UZr2. The co-occurrence of these two events gives rise to a composite thermal arrest in a normal dynamic calorimetry profile. However, if the starting microstructure is the one having the equilibrium mix of α eq and δ-UZr2, then only the peritectoidal dissolution of δ-UZr2 is found in the calorimetry profile. Unless, a very slow cooling rate of the order of 0.1 K min-1 is adopted from high-temperature γ(bcc) phase, it is not possible to obtain 100 pct of α eq phase along with equilibrium amount of δ-UZr2. At normal and high cooling rates, it is possible to suppress the diffusional decomposition of γ to varying extents. The direct γ → α'-martensite transformation has been observed at

  12. Présentation du volume

    Directory of Open Access Journals (Sweden)

    Ana Zwitter Vitez

    2012-12-01

    Full Text Available Dans de nombreuses disciplines scientifiques, le discours parlé représente depuis quelques décennies un objet de recherche proéminent. Ce fait s’explique probablement par deux caractéristiques principales du discours parlé: la structure complexe de sa matérialité et les fonctions variées de différentes pratiques langagières. C’est pourquoi le présent numéro réunit les articles basés sur les approches actuelles du discours parlé et sur les pratiques langagières spécifiques. Le volume est introduit par deux articles interdisciplinaires: Peter Garrard et Ahmed Samrah présentent le domaine de la pathologie du langage en donnant une revue fouillée sur les approches actuelles de l’analyse linguistique lors de la détection de la maladie d’Alzheimer, tandis que Harry Hollien donne un aperçu structuré sur le domaine de la phonétique judiciaire destiné à dévoiler l’identité des locuteurs et de détecter la déception dans le discours parlé. Les analyses explorant l’acquisition du langage commencent par l’article de Katharina Zipser qui examine la progression de structures grammaticales en les mettant en comparaison avec la compétence des apprenants et continuent par l’étude de Meta Lah proposant une évaluation des documents audiovisuels proposés aux apprenants de langue étrangère. Vesna Požgaj Hadži, Damir Horga et Tatjana Balažic Bulc remettent en question la corrélation entre la compétence linguistique et la fluence linguistique auprès de locuteurs non-maternels et l'analyse de Gemma Santiago Alonso aborde l'acquisition de l'article défini dans le langage enfantin. Les articles suivants se réunissent autour du domaine de l'interprétation: Jana Zidar Forte présente une approche actuelle dans l'entrainement d'interprètes, Lea Burjan analyse les phénomènes issus de la pratique de l'interprétation juridique et Simona  Šumrada traite de la reformulation dans le discours de la traduction et de

  13. Uniformity calibration for ICT image

    International Nuclear Information System (INIS)

    The uniformity of ICT image is impaired by beam hardening and the inconsistency of detector units responses. The beam hardening and the nonlinearity of the detector's output have been analyzed. The correction factors are determined experimentally by the detector's responses with different absorption length. The artifacts in the CT image of a symmetrical aluminium cylinder have been eliminated after calibration. (author)

  14. Measurement System and Calibration report

    DEFF Research Database (Denmark)

    Vesth, Allan; Kock, Carsten Weber

    The report describes power curve measurements carried out on a given wind turbine. The measurements are carried out in accordance to Ref. [1]. A site calibration has been carried out; see Ref. [2], and the measured flow correction factors for different wind directions are used in the present...

  15. Measurement System and Calibration report

    DEFF Research Database (Denmark)

    Gómez Arranz, Paula; Villanueva, Héctor

    This Measurement System & Calibration report is describing DTU’s measurement system installed at a specific wind turbine. A major part of the sensors has been installed by others (see [1]) the rest of the sensors have been installed by DTU. The results of the measurements, described in this report...

  16. Scalar Calibration of Vector Magnetometers

    DEFF Research Database (Denmark)

    Merayo, José M.G.; Brauer, Peter; Primdahl, Fritz;

    2000-01-01

    The calibration parameters of a vector magnetometer are estimated only by the use of a scalar reference magnetometer. The method presented in this paper differs from those previously reported in its linearized parametrization. This allows the determination of three offsets or signals in the absence...

  17. Autonomous Attitude Sensor Calibration (ASCAL)

    Science.gov (United States)

    Peterson, Chariya; Rowe, John; Mueller, Karl; Ziyad, Nigel

    1998-01-01

    In this paper, an approach to increase the degree of autonomy of flight software is proposed. We describe an enhancement of the Attitude Determination and Control System by augmenting it with self-calibration capability. Conventional attitude estimation and control algorithms are combined with higher level decision making and machine learning algorithms in order to deal with the uncertainty and complexity of the problem.

  18. Reliability-Based Code Calibration

    DEFF Research Database (Denmark)

    Faber, M.H.; Sørensen, John Dalsgaard

    2003-01-01

    The present paper addresses fundamental concepts of reliability based code calibration. First basic principles of structural reliability theory are introduced and it is shown how the results of FORM based reliability analysis may be related to partial safety factors and characteristic values...

  19. Recommended Inorganic Chemicals for Calibration.

    Science.gov (United States)

    Moody, John R.; And Others

    1988-01-01

    All analytical techniques depend on the use of calibration chemicals to relate analyte concentration to instrumental parameters. Discusses the preparation of standard solutions and provides a critical evaluation of available materials. Lists elements by group and discusses the purity and uses of each. (MVL)

  20. Calibration of personnel dose meters

    International Nuclear Information System (INIS)

    Methods of calibrating both film and thermoluminescent dose meters (TLD) to photon and electron radiations are described. K fluorescent X-rays, heavily filtered X-ray beams, and isotope gamma rays are used at the Los Alamos calibration facility to measure the energy and angular response of radiation detectors over a photon energy range of 10 to 1000keV. Beam spectra, alignment, size and uniformity are discussed. The energy and angular response of dose meters to electrons is measured with beta-emitting isotopes varying in maximum energy from 770 to 2300keV. A free-air ionization chamber is the primary standard used in the measurement of photon radiation. Thimble-sized ionization chambers, calibrated to the free-air chamber, serve as secondary standards. Electron radiation is measured with an end-window ionization chamber having a 7mg/cm2 approximately tissue-equivalent plastic wall. Photon calibrations are performed with personnel dose meters in air, on a phantom, and in a phantom. If the personnel dose meter and secondary chamber are both in air, or both on or both in a phantom, the response of the LiF TLD chip, relative to the secondary chamber, is the same. However, the film dose meter shows a larger relative response on or in the phantom than in air. With beta sources, personnel dose meters are calibrated by exposing the dose meter either in air to a high-dose-rate 90Sr (90Y) source, or in contact with a low-dose-rate uranium source. The differences in personnel dose meter response observed between the two methods are discussed. The personnel dose meters are calibrated to determine penetrating doses by placing the secondary chamber 1cm deep in a phantom and the personnel dose meter on the surface, with a filter over the TLD to simulate 1cm depth. Non-penetrating dose calibrations are measured by placing both chamber and dose meter on the surface of the phantom. (author)

  1. Mahmoud Zubeiri et la fondation du Parti de Dieu

    Directory of Open Access Journals (Sweden)

    Abdelmalek Attaieb

    1999-08-01

    Full Text Available A la veille de l’an 2000, au cœur des équilibres politiques du Yémen, perdure une union que symbolise bien la personnalité du Cheikh Abdallah al-Ahmar. A la fois leader du Rassemblement Yéménite pour la Réforme (al-Tagamu‘ al-Yemeni lil-Islah, la puissante formation islamiste créée en 1990 et chef de la confédération Hâched, le plus important des rassemblements tribaux du nord, le "Cheikh Abdallah", souvent considéré comme la seconde personnalité politique du pays, est également président du...

  2. L'article 1315 du Code civil: contours et alentours

    OpenAIRE

    Michiels, Olivier

    1998-01-01

    Plan: Construction de l'article 1315 du Code civil; La lecture de l'article 1315 du Code civil au fil du temps: théorie classique et théorie moderne; La force obligatoire de l'article 1315 du Code civil; La responsabilité contractuelle et délictuelle; Aménagements à l'article 1315 du Code civil en matière contractuelle en regard de l'étendue de l'obligation; Autres dérogations à l'article 1315 du Code civil: l'exception d'inexécution et les présomptions; La preuve des faits négatifs....

  3. Disassembler mezikódu jazyka Java

    OpenAIRE

    Macháček, Ondřej

    2013-01-01

    Tato práce se zabývá popisem struktury mezikódu jazyka Java a disassemblováním instrukcí mezikódu jazyka Java. Součástí této práce je knihovna pro disassemblování souborů tříd jazyka Java. Knihovna umožňuje zobrazit veškeré disassemblované informace uložené v souboru tříd. Pro ukázku práce s knihovnou byla napsána i jednoduchá aplikace s grafickým uživatelským rozhraním. This thesis focus on the structure of Java class file and disassembling bytecode instructions of Java language. Part of ...

  4. Approches Somatiques du Corps dans la Danse

    Directory of Open Access Journals (Sweden)

    Marcilio Souza

    2014-12-01

    Full Text Available L’éducation somatique est comprise comme un domaine interdisciplinaire qui porte sur la prise de conscience du corps et de son mouvement, proposant une découverte personnelle de ses propres mouvements, de ses propres sensations. Cet article vise une réflexion à travers quelques notes sur le concept d’éducation somatique, de Soma et de corps, ainsi qu’à mettre en évidence deux approches somatiques incorporées dans les pratiques du sujet en question comme les moyens possibles pour penser ce champ d’étude en danse. L’article part d’une approche phénoménologique fondée sur les études de Merleau-Ponty (1999, en prenant comme technique de recherche la description merleau-pontienne.

  5. Les danses du monde. Exemples musicaux

    OpenAIRE

    Giurchescu, Anca

    2011-01-01

    En publiant son coffret Les danses du monde, Hugo Zemp s’est attelé à la tâche périlleuse de fournir un maximum d’informations sur la danse, mode visuel d’expression humaine intimement lié à la musique. Gravitant autour de la relation étroite et compliquée qui unit la musique à la danse, les exemples parviennent à illustrer de façon équilibrée la grande diversité de l’expression vocale et instrumentale, sa richesse rythmique et dynamique, ainsi que la variété des formes de la danse et du voca...

  6. Maxime Coulombe, Petite philosophie du zombie

    OpenAIRE

    Hecquet, Vincent

    2013-01-01

    Le zombie est un personnage à la mode auquel sont consacrés de nombreux films, romans, séries télévisées ou jeux vidéo. Le livre analyse les raisons de cet engouement en montrant que le zombie présente trois figures qui sont chacune en phase avec les interrogations et mythes de notre époque. Le zombie est une figure du double, simultanément inquiétant, pitoyable et parfait exutoire de notre agressivité. Il est aussi une figure du monstre, en ce qu’il incarne la mort et la décrépitude grotesqu...

  7. Modulation de la phase postprandiale du glucose

    OpenAIRE

    Nazare, Julie-Anne

    2009-01-01

    La réduction des excursions glycémiques postprandiales a été proposée comme un moyen pour limiter le risque de développement du diabète de type 2. L’intérêt s’est donc porté sur les outils nutritionnels susceptibles de moduler la biodisponibilité des glucides et ainsi leur impact sur la glycémie postprandiale. Les travaux réalisés au cours de cette thèse avaient pour but d’étudier les effets de différents ingrédients modifiant la biodisponibilité du glucose, non seulement sur la glycémie post...

  8. DU-AGG pilot plant design study

    International Nuclear Information System (INIS)

    The Idaho National Engineering Laboratory (INEL) is developing new methods to produce high-density aggregate (artificial rock) primarily consisting of depleted uranium oxide. The objective is to develop a low-cost method whereby uranium oxide powder (UO[sub 2], U[sub 3]O[sub ]8, or UO[sub 3]) can be processed to produce high-density aggregate pieces (DU-AGG) having physical properties suitable for disposal in low-level radioactive disposal facilities or for use as a component of high-density concrete used as shielding for radioactive materials. A commercial company, G-M Systems, conducted a design study for a manufacturing pilot plant to process DU-AGG. The results of that study are included and summarized in this report. Also explained are design considerations, equipment capacities, the equipment list, system operation, layout of equipment in the plant, cost estimates, and the proposed plan and schedule

  9. Le meurtre du prêtre

    OpenAIRE

    Clayer, Nathalie

    2010-01-01

    En septembre 1906, une çeta (bande) albanaise assassine le métropolite orthodoxe de Korçë, ville située à l'ouest de Bitola, dans une région fortement albanophone. A première vue, on pourrait voir dans ce meurtre du chef local de la communauté orthodoxe perpétré par un groupe formé en majeure partie de musulmans la manifestation tangible d'un affrontement religieux. En réalité, cet acte de violence, replacé dans un cadre plus général, doit être interprété sur un autre plan, celui du nationali...

  10. Musique ! : du phonographe au MP3

    OpenAIRE

    Tournès, Ludovic

    2011-01-01

    nouvelle édition revue et augmentée de "Du phonographe au MP3. Une histoire de la musique enregistrée, XIXe-XXIe siècle" [2008] Depuis l'invention du phonographe par Thomas Edison en 1877, jusqu'à la révolution Internet, la musique enregistrée a connu une histoire longue et riche en rebondissements que l'on trouvera retracée de manière claire, synthétique et vivante dans ce livre. A l'heure où l'industrie de la musique est engagée depuis le début des années 2000 dans une mutation historiqu...

  11. Conceptualisation statistique du champ de la culture

    OpenAIRE

    Deroin, Valérie; Chaintreau, Jean-François

    2015-01-01

    La définition du champ statistique de la culture a fait l’objet de travaux européens de 2009 à 2011, après que les nomenclatures nationales (nomenclature d’activités françaises, NAF Rév. 2) et européenne (nomenclature statistique des activités économiques dans la Communauté européenne, NACE Rév. 2) ont été rénovées en 2008. Sous l’égide d’Eurostat, l’Office statistique de l’Union européenne, un groupe de travail européen (Task Force 1) a conçu la structure du nouveau cadre statistique europée...

  12. Problématique du taxi

    OpenAIRE

    Darbéra, Richard

    2007-01-01

    Nous sommes probablement à l'aube d'une évolution radicale du rôle des taxis dans la mobilité urbaine avec d'une part des besoins croissants pour des services personnalisés que les taxis sont les plus aptes à offrir, et d'autre part, la perspective de voir se desserrer les deux freins à leur développement: la disponibilité et le coût relativement élevé. Ces deux contraintes peuvent d'abord être adoucies par une meilleure régulation qui ouvre à la concurrence les segments du marché pour lesque...

  13. Les effets des fluctuations du prix du pétrole sur les marchés boursiers dans les pays du Golfe.

    OpenAIRE

    Arouri, Mohamed El Hedi; Rault, Christophe

    2010-01-01

    Ce travail utilise les techniques récentes de cointegration en panel et la méthode d'estimation SUR pour tester l'existence d'une relation de long terme entre le prix du pétrole et le cours des actions dans les pays du Conseil de Coopération du Golfe (CCG). Ces pays étant des acteurs majeurs du marché mondial de l'énergie, leurs marchés boursiers devraient être sensibles aux chocs affectant le prix du pétrole. En utilisant une base de données mensuelle couvrant la période allant de janvier 19...

  14. Etude de la variabilité des composantes du rendement du manioc (Manihot esculenta Crantz, var. 312-524) en fonction de la fertilité du sol

    OpenAIRE

    Egle, Komi

    1992-01-01

    Le travail a porté sur la croissance, le développement et les composantes du rendement du manioc (#Manihot esculenta$ CRANTZ, var. 312-524) selon des niveaux de fertilité très contrastés du sol. L'essai a été installé sur terres de barre dans la région Maritime du Sud-TOGO. Les différents niveaux de fertilité du sol ont été obtenus à partir d'un essai fertilisation longue durée installé en 1976 avec une combinaison factorielle d'apports annuels des éléments N, P et K sous culture de maïs. Ce ...

  15. Du polymorphisme au complexe d'especes : combien d'agents pathogenes sont impliques dans la necrose du collet du colza ?

    OpenAIRE

    Rouxel, Thierry; Gall, C.; Balesdent, M.H.

    1994-01-01

    La nécrose du collet des crucifères, ou «phoma du colza», est une maladie qui a subi une extension considérable à la suite de l’intensification de la culture du colza en Europe, au Canada ou en Australie. Phoma lingam (Tode ex Fr) Desm est reconnu depuis de nombreuses années comme étant l’agent responsable de la maladie. La forme sexuée du parasite, phase quasi systématique du cycle, a été identifiée dans les années 1960 à Leptosphaeria maculans (Desm) Ces et de Not. Dès 1927, 2 groupes de so...

  16. Modos de ver. Du Bois y Fanon

    OpenAIRE

    Sandro Mezzadra

    2014-01-01

    The sovereignty of glance and the primacy of sight represent the Western modern culture far beyond its artistic expression, organizing its philosophical and political conceptuality. They deeply influence the way in which subjects are conceived and constructed in Western modernity. This is the point of departure of the long-distance dialogue between W. E. B. Du Bois and Frantz Fanon staged in the article. Their political thought and militancy developed against the background of experiences – s...

  17. Du Pont Classifications of 6 Supernovae

    Science.gov (United States)

    Morrell, N.; Shappee, Benjamin J.

    2016-06-01

    We report optical spectroscopy (range 370-910 nm) of six supernovae from the Backyard Observatory Supernova Search (BOSS) and the All-Sky Automated Survey for Supernovae (ASAS-SN) using the du Pont 2.5-m telescope (+ WFCCD) at Las Campanas Observatory on June 17 2016 UT. We performed a cross-correlation with a library of supernova spectra using the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J.

  18. DuPont Chemical Vapor Technical Report

    International Nuclear Information System (INIS)

    DuPont Safety Resources was tasked with reviewing the current chemical vapor control practices and providing preventive recommendations on best commercial techniques to control worker exposures. The increased focus of the tank closure project to meet the 2024 Tri-Party Agreement (TPA) milestones has surfaced concerns among some CH2MHill employees and other interested parties. CH2MHill is committed to providing a safe working environment for employees and desires to safely manage the tank farm operations using appropriate control measures. To address worker concerns, CH2MHill has chartered a ''Chemical Vapors Project'' to integrate the activities of multiple CH2MHill project teams, and solicit the expertise of external resources, including an independent Industrial Hygiene expert panel, a communications consultant, and DuPont Safety Resources. Over a three-month time period, DuPont worked with CH2MHill ESH and Q, Industrial Hygiene, Engineering, and the independent expert panel to perform the assessment. The process included overview presentations, formal interviews, informal discussions, documentation review, and literature review. DuPont Safety Resources concluded that it is highly unlikely that workers in the tank farms are exposed to chemicals above established standards. Additionally, the conventional and radiological chemistry is understood, the inherent chemical hazards are known, and the risk associated with chemical vapor exposure is properly managed. The assessment highlighted management's commitment to addressing chemical vapor hazards and controlling the associated risks. Additionally, we found the Industrial Hygiene staff to be technically competent and well motivated. The tank characterization data resides in a comprehensive database containing the tank chemical compositions and relevant airborne concentrations

  19. Autour du paradigme d’écotourisme

    Directory of Open Access Journals (Sweden)

    Anne-Laure Transler

    2008-02-01

    Full Text Available L’écotourisme ouvre un cadre conceptuel original qui permet d’envisager des démarches renouvelées de développement à partir des revenus issus de consommations touristiques mieux réfléchies et organisées, susceptibles de soutenir des initiatives de développement local s’inscrivant dans un projet global de développement durable. Variante douce du tourisme, loin du tourisme de masse, le champ de l’écotourisme s’étend aux confins du tourisme de nature, du tourisme culturel et des pratiques scientifiques et sportives de plein air. Une définition de l’écotourisme peut être proposée à partir des six points suivants : 1/ nature et culture, 2/ le bien-être des sociétés hôtes, 3/ des touristes responsables, 4/ la participation des sociétés hôtes, 5/ la durabilité, 6/ l’art de la rencontre.Ecotourism provides an original conceptual framework that enables approaches to development that are better able to provide a more equitable distribution of income, as well as better organized and thought through initiatives which are more likely to promote a holistic sustainable local development. With somewhat less negative impact than normal tourism, considerably less that mass tourism, ecotourism can encompass nature tourism, cultural tourism, scientific exploration, and even outdoor sports... A definition of ecotourism should take into account the following six points: 1/ nature and culture, 2/ the welfare of the host community, tourists acting responsibly, 3/ participation by the local community, 5 / sustainability , 6/ promotion of cultural exchanges

  20. Tribunal administratif de l'Organisation internationale du Travail (TAOIT)

    CERN Document Server

    International Labour Organization. Geneva

    Le Tribunal administratif de l'Organisation internationale du Travail connaît des requêtes formées par les fonctionnaires ou les anciens fonctionnaires du Bureau international du Travail et des quelque trente organisations qui ont reconnu sa compétence. The ILO Administrative Tribunal (ILOAT) hears complaints from serving and former officials of the International Labour Office or one of the thirty-odd intergovernmental organizations that recognise its jurisdiction.

  1. Mathematical efficiency calibration in gamma spectroscopy

    CERN Document Server

    Kaminski, S; Wilhelm, C

    2003-01-01

    Mathematical efficiency calibration with the LabSOCS software was introduced for two detectors in the measurement laboratory of the Central Safety Department of Forschungszentrum Karlsruhe. In the present contribution, conventional efficiency calibration of gamma spectroscopy systems and mathematical efficiency calibration with LabSOCS are compared with respect to their performance, uncertainties, expenses, and results. It is reported about the experience gained, and the advantages and disadvantages of both methods of efficiency calibration are listed. The results allow the conclusion to be drawn that mathematical efficiency calibration is a real alternative to conventional efficiency calibration of gamma spectroscopy systems as obtained by measurements of mixed gamma ray standard sources.

  2. Design, construction, and calibration of an isothermal titration calorimeter and its application in the study of the adsorption of phenolic compounds.

    Science.gov (United States)

    Moreno-Piraján, Juan Carlos; Giraldo, Liliana

    2012-01-01

    An isothermal calorimetric titration was designed and built, and some of the results obtained are presented here. For this purpose, a Calvet heat-conducting microcalorimeter was developed and connected to a titration unit built for this experiment to record titration thermograms. The microcalorimeter was electrically calibrated to establish its sensitivity and reproducibility, obtaining K = 13.56 ± 0.21 W V(-1). Additionally, the equipment was tested using the heat of neutralisation for the tris-hydroxymethyl-aminomethane-HCl (THAM-HCl) system, obtaining ΔH = -30.92 ± 0.03 kJ mol(-1). The unit was assembled to obtain titration heats and the corresponding thermodynamic variables (ΔH, ΔG, ΔS, and K(e)) with a system of phenolic derivatives-activated carbon (synthesised from potato peel). PMID:22299996

  3. Design, construction, and calibration of an isothermal titration calorimeter and its application in the study of the adsorption of phenolic compounds

    Science.gov (United States)

    Moreno-Piraján, Juan Carlos; Giraldo, Liliana

    2012-01-01

    An isothermal calorimetric titration was designed and built, and some of the results obtained are presented here. For this purpose, a Calvet heat-conducting microcalorimeter was developed and connected to a titration unit built for this experiment to record titration thermograms. The microcalorimeter was electrically calibrated to establish its sensitivity and reproducibility, obtaining K = 13.56 ± 0.21 W V-1. Additionally, the equipment was tested using the heat of neutralisation for the tris-hydroxymethyl-aminomethane-HCl (THAM-HCl) system, obtaining ΔH = -30.92 ± 0.03 kJ mol-1. The unit was assembled to obtain titration heats and the corresponding thermodynamic variables (ΔH, ΔG, ΔS, and Ke) with a system of phenolic derivatives-activated carbon (synthesised from potato peel).

  4. Potentiel du bananier dans la gestion et la conservation des sols ferrallitiques du Burundi

    OpenAIRE

    Rishirumuhirwa, T.

    1993-01-01

    Une étude a été menée à la station de Mashitsi (Burundi) pour mettre en évidence la production et le rôle des résidus du bananier dans la gestion du ruissellemnet et le contrôle de l'érosion. Concernant la production, les résultats montrent que les rendements en résidus restent faibles sur des sols aussi acides et désaturés (1 à 2,7 t/ha/an de matière sèche selon les densités de plantation). Disposés sous forme de bandes de paillis, ces résidus permettent de couvrir entre 10 et 25% du sol ave...

  5. LE MARCHE MONDIAL DU VIN ET LES NOUVELLES ORIENTATIONS DU MARKETING

    OpenAIRE

    Epuran Gheorghe

    2008-01-01

    Le marché mondial du vin est caractérisé par un développement sans précédent en ce qui concerne la production, mais aussi l’aire géographique qu’il comprend. La surproduction qui a tendance ŕ dégénérer en une crise est due premičrement ŕ l’apparition de nouveaux acteurs sur ce marché, c’est-ŕ-dire les pays du nouveau monde du vin: les Etats-Unis, le Chili, l’Afrique de Sud, l’Australie. Dans ce contexte, les grands producteurs traditionnels de l’Europe sont soumis ŕ une forte pression concurr...

  6. L’arme du chant collectif au cœur du conflit biafrais

    OpenAIRE

    Ugochukwu, Françoise

    2011-01-01

    Si des auteurs comme Basden, Leith-Ross et Nwando Achebe ont mentionné dans leurs écrits la puissance du chant dans la culture igbo, le rôle des chants nés du conflit biafrais et les raisons de leur diffusion sont des questions qui n’ont jamais encore été vraiment abordées - ce sera donc le but de cet article. Partant d’un disque de seize chants en igbo (6), anglais (8) et ijo (2) enregistrés pendant la guerre civile nigériane à 15km du front, juste avant la chute d’Umuahia, capitale provisoi...

  7. Violences du corps : Une étude du macabre chez Ronsard, Aubigné et Chassignet

    OpenAIRE

    2008-01-01

    À la fin du seizième, début du dix-septième siècle, l’Europe est dominée par de nombreuses guerres, épidémies, famines et exécutions publiques. Couplé à un nouvel intérêt pour l’anatomie intérieure du corps humain, ce contexte historique sanglant crée une familiarisation avec le corps ouvert, avec la violence corporelle, la souffrance et la mort. Cette familiarisation est également percevable dans l’art sculptural et pictural de l’époque, ainsi que dans sa littérature, aussi bien sur la scène...

  8. Stylistique(s) contrastive(s) du discours scientifique

    OpenAIRE

    Michel PETIT

    2012-01-01

    On postule que la stylistique a un rôle important à jouer dans l'étude du discours scientifique. Après avoir examiné les facteurs de diversité du discours scientifique et le statut de l'anglais scientifique, on s'intéresse à la question du style scientifique, notamment en termes d'expérience commune. On est enfin conduit, en étudiant les approches contrastives, à envisager une stylistique véritablement contrastive propre à rendre compte des spécificités du discours scientifique.

  9. Les codes du factice dans Big Fish de Tim Burton

    OpenAIRE

    Paquet-Deyris, Anne-Marie

    2010-01-01

    Big Fish de Tim Burton s’insère dans la structure classique du conte initiatique. Le film se donne essentiellement comme une variation visuelle sur l’art du conte et sa transmission. Un fils tente de comprendre son père mourant, conteur extraordinaire. Alors qu’il arrive au chevet du mythomane et que défile le générique, l’univers de Tall Tale du Sud des Etats-Unis envahit déjà le cadre et traduit visuellement les figures grotesques et féeriques des histoires hyperboliques. Leurs artifices so...

  10. Les pathologies du Canal Péritonio-Vaginal

    OpenAIRE

    DJAZIRI, Sihem Fatima Zohra

    2014-01-01

    Les pathologies du canal péritonéo-vaginal, sont des affections congénitales dues à la persistance du canal au delà de la naissance. Elles regroupent les hernies inguinales et inguino-scrotales, les hydrocèles communicantes ou non, et les kystes du cordon spermatique. Notre travail est une étude rétrospective portant sur 309 malades opérés de pathologies du canal péritonio-vaginal dans le service de chirurgie infantile durant la période allant d’octobre 2011 jusqu'à octobre ...

  11. Matere z motnjami v duševnem razvoju

    OpenAIRE

    Kolarič, Sandra

    2015-01-01

    S pregledom tuje literature in že opravljenih raziskav v tujini smo v teoretičnem delu magistrske naloge zajeli značilnosti mater z motnjami v duševnem razvoju, dejavnike, ki vplivajo na uspešnost opravljanja materinske vloge, ter pravice oseb z motnjami v duševnem razvoju do starševstva, v povezavi z zakonodajo na slovenskem. Navedli smo vzroke za omejevanje reprodukcije pri ženskah z motnjami v duševnem razvoju in problematiko odvzema skrbništva materam z motnjami v duševnem razvoju nad otr...

  12. Cloning and sequencing of Duck circovirus (DuCV).

    Science.gov (United States)

    Hattermann, K; Schmitt, C; Soike, D; Mankertz, A

    2003-12-01

    The genome of Duck circovirus (DuCV) is circular and 1996 nts in size. Two major open reading frames were identified, encoding the replicase (V1) and the capsid protein (C1). A stem-loop structure comprising the nonamer 5'-TATTATTAC, conserved in all circo-, nano- and geminiviruses, was found. Unique to DuCV, the region between the 3'-ends of the rep and cap gene contains four repeats of a 44-bp sequence. Phylogenetic analysis shows close relation of DuCV with Goose circovirus and suggests classification of DuCV as a new member of the genus Circovirus of the virus family Circoviridae. PMID:14648300

  13. LES RESSORTS DU CONSENTEMENT SERVICIEL DANS LE NOUVEAU CAPITALISME COMMERCIAL

    OpenAIRE

    Hocquelet, Mathieu

    2012-01-01

    Interrogeant la nature du lien entre ressorts du consentement des employés de la grande distribution au travail, renforcement du pouvoir financier et remise en question du régime d’accumulation d’une branche particulièrement exposée au public, cette thèse s’appuie sur une enquête qualitative réalisée dans une trentaine de magasins de neuf enseignes, tous formats et structures confondus, situés dans les principales agglomérations françaises. D’une part, une centaine d’entretiens semi directifs...

  14. Sources of uncertainty in vicarious calibration: understanding calibration target reflectance

    OpenAIRE

    Anderson, K.; Milton, E. J.; Rollin, E.M.

    2003-01-01

    A field experiment investigated the hypothesis that the nadir reflectance of calibration surface substrates (asphalt and concrete) remains stable over a range of time-scales. Measurable differences in spectral reflectance factors were found over periods as short as 30 minutes. Multi-date reflectance measurements were compared using ANOVA and found to differ significantly (p = 0.001). Surface reflectance showed a relationship with the relative proportion of diffuse irradiance, over periods ...

  15. Extracting the MESA SR4000 calibrations

    Science.gov (United States)

    Charleston, Sean A.; Dorrington, Adrian A.; Streeter, Lee; Cree, Michael J.

    2015-05-01

    Time-of-flight range imaging cameras are capable of acquiring depth images of a scene. Some algorithms require these cameras to be run in `raw mode', where any calibrations from the off-the-shelf manufacturers are lost. The calibration of the MESA SR4000 is herein investigated, with an attempt to reconstruct the full calibration. Possession of the factory calibration enables calibrated data to be acquired and manipulated even in "raw mode." This work is motivated by the problem of motion correction, in which the calibration must be separated into component parts to be applied at different stages in the algorithm. There are also other applications, in which multiple frequencies are required, such as multipath interference correction. The other frequencies can be calibrated in a similar way, using the factory calibration as a base. A novel technique for capturing the calibration data is described; a retro-reflector is used on a moving platform, which acts as a point source at a distance, resulting in planar waves on the sensor. A number of calibrations are retrieved from the camera, and are then modelled and compared to the factory calibration. When comparing the factory calibration to both the "raw mode" data, and the calibration described herein, a root mean squared error improvement of 51:3mm was seen, with a standard deviation improvement of 34:9mm.

  16. Radiometric Calibration of Osmi Imagery Using Solar Calibration

    Science.gov (United States)

    Lee, Dong-Han; Kim, Yong-Seung

    2000-12-01

    OSMI (Ocean Scanning Multi-Spectral Imager) raw image data (Level 0) were acquired and radiometrically corrected. We have applied two methods, using solar & dark calibration data from OSMI sensor and comparing with the SeaWiFS data, to the radiometric correction of OSMI raw image data. First, we could get the values of the gain and the offset for each pixel and each band from comparing the solar & dark calibration data with the solar input radiance values, calculated from the transmittance, BRDF (Bidirectional Reflectance Distribution Function) and the solar incidence angle (¥â,¥è) of OSMI sensor. Applying this calibration data to OSMI raw image data, we got the two odd results, the lower value of the radiometric corrected image data than the expected value, and the Venetian Blind Effect in the radiometric corrected image data. Second, we could get the reasonable results from comparing OSMI raw image data with the SeaWiFS data, and get a new problem of OSMI sensor.

  17. Calibration of a low temperature calorimeter and application in the determination of isobaric heat capacity of 2-propanol

    Energy Technology Data Exchange (ETDEWEB)

    Casas, L.M., E-mail: lmcasas@uvigo.es [Departamento de Fisica Aplicada, Facultade de Ciencias Experimentais, Universidade de Vigo, Lagoas Marcosende s/n, 36310 Vigo (Spain); Plantier, F. [Laboratoire de Thermodynamique et Energetique des Fluides Complexes - UMR 5150, Universite de Pau et des Pays de l' Adour, BP 1155, 64013 Pau (France); Pineiro, M.M.; Legido, J.L. [Departamento de Fisica Aplicada, Facultade de Ciencias Experimentais, Universidade de Vigo, Lagoas Marcosende s/n, 36310 Vigo (Spain); Bessieres, D. [Laboratoire de Thermodynamique et Energetique des Fluides Complexes - UMR 5150, Universite de Pau et des Pays de l' Adour, BP 1155, 64013 Pau (France)

    2010-08-10

    Nowadays, the experimental thermodynamic characterization of solvents in an extended range of temperatures and pressures is essential for the development of a wide variety of industrial applications (refrigeration, reactors, pumping, etc.). Moreover, accurate experimental data are also the key for the successful development and subsequent benchmarking of thermodynamic theoretical models. In the particular case of isobaric heat capacities, there are quite a lot of reported experimental high temperature data but, on the other hand, low temperature data are practically inexistent for most compounds. Bearing this limitation in mind, the present work is focused on the development of a new calibration methodology for calorimetric determination of isobaric heat capacities in liquid state at low temperatures. For this purpose, a Calvet calorimeter, SETARAM BT 2.15 has been used. By means of the calibration procedure explained below, this calorimeter allows to determine phase transitions and thermodynamic properties in a wide range of temperature (233.15-473.15 K) and pressure (0.1-100 MPa).

  18. Calibration of a low temperature calorimeter and application in the determination of isobaric heat capacity of 2-propanol

    International Nuclear Information System (INIS)

    Nowadays, the experimental thermodynamic characterization of solvents in an extended range of temperatures and pressures is essential for the development of a wide variety of industrial applications (refrigeration, reactors, pumping, etc.). Moreover, accurate experimental data are also the key for the successful development and subsequent benchmarking of thermodynamic theoretical models. In the particular case of isobaric heat capacities, there are quite a lot of reported experimental high temperature data but, on the other hand, low temperature data are practically inexistent for most compounds. Bearing this limitation in mind, the present work is focused on the development of a new calibration methodology for calorimetric determination of isobaric heat capacities in liquid state at low temperatures. For this purpose, a Calvet calorimeter, SETARAM BT 2.15 has been used. By means of the calibration procedure explained below, this calorimeter allows to determine phase transitions and thermodynamic properties in a wide range of temperature (233.15-473.15 K) and pressure (0.1-100 MPa).

  19. Le Silurien du Synclinorium de Moncorvo (NE du Portugal): Biostratigraphie et Importance Paléogéographique

    Czech Academy of Sciences Publication Activity Database

    Sarmiento, G. N.; Picarra, J. M.; Rebelo, J. A.; Robardet, M.; Gutiérrez-Marco, J. C.; Štorch, Petr; Rábano, I.

    1999-01-01

    Roč. 32, č. 5 (1999), s. 749-767. ISSN 0016-6995 R&D Projects: GA AV ČR Projects 351 et 421 du Programme International de Corrélation Géologique et au Projet Iberian Variscides du programme Europrobe, Projet 061-B0 du Programme de Coopération Scientifique et Technique Franco -Portugais Subject RIV: DB - Geology ; Mineralogy Impact factor: 0.736, year: 1999

  20. L’exercice autoritatif du blogueur et le genre éditorial du microblogging de Tumblr

    OpenAIRE

    Broudoux, Évelyne

    2014-01-01

    En tant qu’étape intermédiaire de recherche sur les relations qui unissent les concepts de « publication », de « réseaux sociaux » et de « Web de documents », cet article interroge le conditionnement du genre de la publication par des outils de communication en ligne. Quatre mois d’observation participante d’un outil de microblogging (Tumblr) en 2008 montrent les modifications du style et des comportements des auteurs. This article as an intermediary stage in a research—on the relations of...

  1. Les politiques straight du préservatif : VIH, pornographie et technologies du genre

    OpenAIRE

    Ribeiro, Kira

    2016-01-01

    Les productions pornographiques bisexuelles et « shemale » donnent à voir des configurations particulières de l’usage du préservatif qui informent tant sur les politiques du VIH que sur les politiques sexuelles au sein de cette industrie. Dans certaines de ces productions, les rapports entre hommes et femmes non-trans se font sans préservatif, tandis que dans la même scène et avec les mêmes performeurs, les rapports entre hommes ou impliquant une femme trans se font avec préservatif. À traver...

  2. A calorimetric study of the kinetics and thermodynamics of the attack of synthetic fluorapatite by mixtures of sulfuric and phosphoric acids is undertaken at 25 deg. C

    International Nuclear Information System (INIS)

    A calorimetric study of the kinetics and thermodynamics of the attack of synthetic fluorapatite by mixtures of sulfuric and phosphoric acids is undertaken at 25 deg.. C. The global enthalpy of the attack equals -407.0 kJ/mol. Interpretation of the calorimeteric results by Avrami model shows the existence of two steps. The first is attributed to the dissolution of the solid, and the second to precipitation of gypsum. The deconvoluted curves were analysed iteratively to obtain the kinetic parameters and the enthalpy of precipitation. The later quantity does not differ from the experimental value by more than 2.3% and the reaction order equals 2 and 0.5 for calcium and sulphate ions respectively

  3. CDMSlite: A Search for Low-Mass WIMPs using Voltage-Assisted Calorimetric Ionization Detection in the SuperCDMS Experiment

    CERN Document Server

    Agnese, R; Asai, M; Balakishiyeva, D; Thakur, R Basu; Bauer, D A; Billard, J; Borgland, A; Bowles, M A; Brandt, D; Brink, P L; Bunker, R; Cabrera, B; Caldwell, D O; Cerdeno, D G; Chagani, H; Cooley, J; Cornell, B; Crewdson, C H; Cushman, P; Daal, M; Di Stefano, P C F; Doughty, T; Esteban, L; Fallows, S; Figueroa-Feliciano, E; Godfrey, G L; Golwala, S R; Hall, J; Harris, H R; Hertel, S A; Hofer, T; Holmgren, D; Hsu, L; Huber, M E; Jastram, A; Kamaev, O; Kara, B; Kelsey, M H; Kennedy, A; Kiveni, M; Koch, K; Loer, B; Asamar, E Lopez; Mahapatra, R; Mandic, V; Martinez, C; McCarthy, K A; Mirabolfathi, N; Moffatt, R A; Moore, D C; Nadeau, P; Nelson, R H; Page, K; Partridge, R; Pepin, M; Phipps, A; Prasad, K; Pyle, M; Qiu, H; Rau, W; Redl, P; Reisetter, A; Ricci, Y; Saab, T; Sadoulet, B; Sander, J; Schneck, K; Schnee, R W; Scorza, S; Serfass, B; Shank, B; Speller, D; Villano, A N; Welliver, B; Wright, D H; Yellin, S; Yen, J J; Young, B A; Zhang, J

    2014-01-01

    SuperCDMS is an experiment designed to directly detect Weakly Interacting Massive Particles (WIMPs), a favored candidate for dark matter ubiquitous in the Universe. In this paper, we present WIMP-search results using a calorimetric technique we call CDMSlite, which relies on voltage- assisted Luke-Neganov amplification of the ionization energy deposited by particle interactions. The data were collected with a single 0.6 kg germanium detector running for 10 live days at the Soudan Underground Laboratory. A low energy threshold of 170 eVee (electron equivalent) was obtained, which allows us to constrain new WIMP-nucleon spin-independent parameter space for WIMP masses below 6 GeV/c2.

  4. SIRENA, une plateforme participative au service de la gouvernance du delta transfrontalier du fleuve Sénégal

    OpenAIRE

    Cormier-Salem, Marie-Christine; Toure, Labaly; Fabre, Mathilde; Bouaita, Yasmin; Ba Mamadou El Abass, Boubacar; Habert, Élisabeth

    2016-01-01

    Les zones humides littorales, écosystèmes aux services diversifiés et soumis à des pressions multiples, font l’objet de politiques de gestion contradictoires, balançant entre l’exploitation à des fins agricoles ou hydro-électriques et la conservation de la biodiversité. Tel est le cas du Delta du fleuve Sénégal, devenu Réserve de Biosphère en 2005, dans un contexte de mutations environnementales et socio-économiques rapides.Pour représenter les enjeux complexes et dynamiques du Delta du fleuv...

  5. Calibration and Validation of Measurement System

    DEFF Research Database (Denmark)

    Kofoed, Jens Peter; Riemann, Sven; Knapp, Wilfried

    The report deals with the calibration of the measuring equipment on board the Wave Dragon, Nissum Bredning prototype.......The report deals with the calibration of the measuring equipment on board the Wave Dragon, Nissum Bredning prototype....

  6. Attitude Sensor and Gyro Calibration for Messenger

    Science.gov (United States)

    O'Shaughnessy, Daniel; Pittelkau, Mark E.

    2007-01-01

    The Redundant Inertial Measurement Unit Attitude Determination/Calibration (RADICAL(TM)) filter was used to estimate star tracker and gyro calibration parameters using MESSENGER telemetry data from three calibration events. We present an overview of the MESSENGER attitude sensors and their configuration is given, the calibration maneuvers are described, the results are compared with previous calibrations, and variations and trends in the estimated calibration parameters are examined. The warm restart and covariance bump features of the RADICAL(TM) filter were used to estimate calibration parameters from two disjoint telemetry streams. Results show that the calibration parameters converge faster with much less transient variation during convergence than when the filter is cold-started at the start of each telemetry stream.

  7. Automated Calibration of Dosimeters for Diagnostic Radiology

    International Nuclear Information System (INIS)

    Calibration of dosimeters for diagnostic radiology includes current and charge measurements, which are often repetitive. However, these measurements are usually done using modern electrometers, which are equipped with an RS-232 interface that enables instrument control from a computer. This paper presents an automated system aimed to the measurements for the calibration of dosimeters used in diagnostic radiology. A software application was developed, in order to achieve the acquisition of the electric charge readings, measured values of the monitor chamber, calculation of the calibration coefficient and issue of a calibration certificate. A primary data record file is filled and stored in the computer hard disk. The calibration method used was calibration by substitution. With this system, a better control over the calibration process is achieved and the need for human intervention is reduced. the automated system will be used in the calibration of dosimeters for diagnostic radiology at the Cuban Secondary Standard Dosimetry Laboratory of the Center for Radiation Protection and Hygiene. (Author)

  8. Automatic calibration system for pressure transducers

    Science.gov (United States)

    1968-01-01

    Fifty-channel automatic pressure transducer calibration system increases quantity and accuracy for test evaluation calibration. The pressure transducers are installed in an environmental tests chamber and manifolded to connect them to a pressure balance which is uniform.

  9. Quality control for dose calibrators

    International Nuclear Information System (INIS)

    Nuclear medicine laboratories are required to assay samples of radioactivity to be administered to patients. Almost universally, these assays are accomplished by use of a well ionization chamber isotope calibrator. The Instituto de Radioprotecao e Dosimetria (Institute for Radiological Protection and Dosimetry) of the Comissao Nacional de Energia Nuclear (National Commission for Nuclear Energy) is carrying out a National Quality Control Programme in Nuclear Medicine, supported by the International Atomic Energy Agency. The assessment of the current needs and practices of quality control in the entire country of Brazil includes Dose Calibrators and Scintillation Cameras, but this manual is restricted to the former. Quality Control Procedures for these Instruments are described in this document together with specific recommendations and assessment of its accuracy. (author)

  10. Spinning angle optical calibration apparatus

    Science.gov (United States)

    Beer, Stephen K.; Pratt, II, Harold R.

    1991-01-01

    An optical calibration apparatus is provided for calibrating and reproducing spinning angles in cross-polarization, nuclear magnetic resonance spectroscopy. An illuminated magnifying apparatus enables optical setting an accurate reproducing of spinning "magic angles" in cross-polarization, nuclear magnetic resonance spectroscopy experiments. A reference mark scribed on an edge of a spinning angle test sample holder is illuminated by a light source and viewed through a magnifying scope. When the "magic angle" of a sample material used as a standard is attained by varying the angular position of the sample holder, the coordinate position of the reference mark relative to a graduation or graduations on a reticle in the magnifying scope is noted. Thereafter, the spinning "magic angle" of a test material having similar nuclear properties to the standard is attained by returning the sample holder back to the originally noted coordinate position.

  11. Sky camera geometric calibration using solar observations

    OpenAIRE

    Urquhart, B.; Kurtz, B; J. Kleissl

    2016-01-01

    A camera model and associated automated calibration procedure for stationary daytime sky imaging cameras is presented. The specific modeling and calibration needs are motivated by remotely deployed cameras used to forecast solar power production where cameras point skyward and use 180° fisheye lenses. Sun position in the sky and on the image plane provides a simple and automated approach to calibration; special equipment or calibration patterns are not required. Sun positio...

  12. Binary Classifier Calibration: Non-parametric approach

    OpenAIRE

    Naeini, Mahdi Pakdaman; Cooper, Gregory F.; Hauskrecht, Milos

    2014-01-01

    Accurate calibration of probabilistic predictive models learned is critical for many practical prediction and decision-making tasks. There are two main categories of methods for building calibrated classifiers. One approach is to develop methods for learning probabilistic models that are well-calibrated, ab initio. The other approach is to use some post-processing methods for transforming the output of a classifier to be well calibrated, as for example histogram binning, Platt scaling, and is...

  13. WCDMA User Equipment Output Power Calibration

    OpenAIRE

    Folkeson, Tea

    2003-01-01

    To save time in Flextronics high volume production, the time for test and calibration of mobile telephones need to be as short and accurate as possible. In the wideband code division multiple access (WCDMA) case, the output power calibration is the most critical calibration concerning accuracy. The aim with this thesis was to find a faster calibration method than the one that exists today and still retain accuracy. The Third Generation Partnership Project (3GPP) outlines the requirements of ...

  14. GREAT/SOFIA atmospheric calibration

    OpenAIRE

    Guan, Xin; Stutzki, Jürgen; Graf, Urs U.; Güsten, Rolf; Okada, Yoko; Torres, Miguel Angel Requena; Simon, Robert; Wiesemeyer, Helmut

    2012-01-01

    The GREAT observations need frequency-selective calibration across the passband for the residual atmospheric opacity at flight altitude. At these altitudes the atmospheric opacity has both narrow and broad spectral features. To determine the atmospheric transmission at high spectral resolution, GREAT compares the observed atmospheric emission with atmospheric model predictions, and therefore depends on the validity of the atmospheric models. We discusse the problems identified in this compari...

  15. Automated Camera Array Fine Calibration

    Science.gov (United States)

    Clouse, Daniel; Padgett, Curtis; Ansar, Adnan; Cheng, Yang

    2008-01-01

    Using aerial imagery, the JPL FineCalibration (JPL FineCal) software automatically tunes a set of existing CAHVOR camera models for an array of cameras. The software finds matching features in the overlap region between images from adjacent cameras, and uses these features to refine the camera models. It is not necessary to take special imagery of a known target and no surveying is required. JPL FineCal was developed for use with an aerial, persistent surveillance platform.

  16. Colour calibration for colour reproduction

    OpenAIRE

    Emmel, P.; R. D. Hersch

    2000-01-01

    Due to the proliferation of low-cost colour devices (digital colour cameras, scanners, printers etc.) during the last few years, colour calibration has become an important issue. Such devices should faithfully reproduce colour images, but experience shows they don't. Among the main reasons, we note the diversity of acquisition, display and printing technologies which makes standardization difficult. Each device has a different gamut, i.e. a different set of colours that it can acquire or repr...

  17. Multidetector calibration for mass spectrometers

    International Nuclear Information System (INIS)

    The International Atomic Energy Agency's Safeguards Analytical Laboratory has performed calibration experiments to measure the different efficiencies among multi-Faraday detectors for a Finnigan-MAT 261 mass spectrometer. Two types of calibration experiments were performed: (1) peak-shift experiments and (2) peak-jump experiments. For peak-shift experiments, the ion intensities were measured for all isotopes of an element in different Faraday detectors. Repeated measurements were made by shifting the isotopes to various Faraday detectors. Two different peak-shifting schemes were used to measure plutonium (UK Pu5/92138) samples. For peak-jump experiments, ion intensities were measured in a reference Faraday detector for a single isotope and compared with those measured in the other Faraday detectors. Repeated measurements were made by switching back-and-forth between the reference Faraday detector and a selected Faraday detector. This switching procedure is repeated for all Faraday detectors. Peak-jump experiments were performed with replicate measurements of 239Pu, 187Re, and 238U. Detector efficiency factors were estimated for both peak-jump and peak-shift experiments using a flexible calibration model to statistically analyze both types of multidetector calibration experiments. Calculated detector efficiency factors were shown to depend on both the material analyzed and the experimental conditions. A single detector efficiency factor is not recommended for each detector that would be used to correct routine sample analyses. An alternative three-run peak-shift sample analysis should be considered. A statistical analysis of the data from this peak-shift experiment can adjust the isotopic ratio estimates for detector differences due to each sample analysis

  18. ASCAL: Autonomous Attitude Sensor Calibration

    Science.gov (United States)

    Peterson, Chariya; Rowe, John; Mueller, Karl; Ziyad, Nigel

    1999-01-01

    Abstract In this paper, an approach to increase the degree of autonomy of flight software is proposed. We describe an enhancement of the Attitude Determination and Control System by augmenting it with self-calibration capability. Conventional attitude estimation and control algorithms are combined with higher level decision making and machine learning algorithms in order to deal with the uncertainty and complexity of the problem.

  19. Calibrating thermal behavior of electronics

    Science.gov (United States)

    Chainer, Timothy J.; Parida, Pritish R.; Schultz, Mark D.

    2016-05-31

    A method includes determining a relationship between indirect thermal data for a processor and a measured temperature associated with the processor, during a calibration process, obtaining the indirect thermal data for the processor during actual operation of the processor, and determining an actual significant temperature associated with the processor during the actual operation using the indirect thermal data for the processor during actual operation of the processor and the relationship.

  20. PACS photometer calibration block analysis

    CERN Document Server

    Moór, A; Kiss, Cs; Balog, Z; Billot, N; Marton, G

    2013-01-01

    The absolute stability of the PACS bolometer response over the entire mission lifetime without applying any corrections is about 0.5% (standard deviation) or about 8% peak-to-peak. This fantastic stability allows us to calibrate all scientific measurements by a fixed and time-independent response file, without using any information from the PACS internal calibration sources. However, the analysis of calibration block observations revealed clear correlations of the internal source signals with the evaporator temperature and a signal drift during the first half hour after the cooler recycling. These effects are small, but can be seen in repeated measurements of standard stars. From our analysis we established corrections for both effects which push the stability of the PACS bolometer response to about 0.2% (stdev) or 2% in the blue, 3% in the green and 5% in the red channel (peak-to-peak). After both corrections we still see a correlation of the signals with PACS FPU temperatures, possibly caused by parasitic h...

  1. Unassisted 3D camera calibration

    Science.gov (United States)

    Atanassov, Kalin; Ramachandra, Vikas; Nash, James; Goma, Sergio R.

    2012-03-01

    With the rapid growth of 3D technology, 3D image capture has become a critical part of the 3D feature set on mobile phones. 3D image quality is affected by the scene geometry as well as on-the-device processing. An automatic 3D system usually assumes known camera poses accomplished by factory calibration using a special chart. In real life settings, pose parameters estimated by factory calibration can be negatively impacted by movements of the lens barrel due to shaking, focusing, or camera drop. If any of these factors displaces the optical axes of either or both cameras, vertical disparity might exceed the maximum tolerable margin and the 3D user may experience eye strain or headaches. To make 3D capture more practical, one needs to consider unassisted (on arbitrary scenes) calibration. In this paper, we propose an algorithm that relies on detection and matching of keypoints between left and right images. Frames containing erroneous matches, along with frames with insufficiently rich keypoint constellations, are detected and discarded. Roll, pitch yaw , and scale differences between left and right frames are then estimated. The algorithm performance is evaluated in terms of the remaining vertical disparity as compared to the maximum tolerable vertical disparity.

  2. Model Calibration in Watershed Hydrology

    Science.gov (United States)

    Yilmaz, Koray K.; Vrugt, Jasper A.; Gupta, Hoshin V.; Sorooshian, Soroosh

    2009-01-01

    Hydrologic models use relatively simple mathematical equations to conceptualize and aggregate the complex, spatially distributed, and highly interrelated water, energy, and vegetation processes in a watershed. A consequence of process aggregation is that the model parameters often do not represent directly measurable entities and must, therefore, be estimated using measurements of the system inputs and outputs. During this process, known as model calibration, the parameters are adjusted so that the behavior of the model approximates, as closely and consistently as possible, the observed response of the hydrologic system over some historical period of time. This Chapter reviews the current state-of-the-art of model calibration in watershed hydrology with special emphasis on our own contributions in the last few decades. We discuss the historical background that has led to current perspectives, and review different approaches for manual and automatic single- and multi-objective parameter estimation. In particular, we highlight the recent developments in the calibration of distributed hydrologic models using parameter dimensionality reduction sampling, parameter regularization and parallel computing.

  3. Calibration of RB reactor power

    International Nuclear Information System (INIS)

    The first and only calibration of RB reactor power was done in 1962, and the obtained calibration ratio was used irrespective of the lattice pitch and core configuration. Since the RB reactor is being prepared for operation at higher power levels it was indispensable to reexamine the calibration ratio, estimate its dependence on the lattice pitch, critical level of heavy water and thickness of the side reflector. It was necessary to verify the reliability of control and dosimetry instruments, and establish neutron and gamma dose dependence on reactor power. Two series of experiments were done in June 1976. First series was devoted to tests of control and dosimetry instrumentation and measurements of radiation in the RB reactor building dependent on reactor power. Second series covered measurement of thermal and epithermal neuron fluxes in the reactor core and calculation of reactor power. Four different reactor cores were chosen for these experiments. Reactor pitches were 8, 8√2, and 16 cm with 40, 52 and 82 fuel channels containing 2% enriched fuel. Obtained results and analysis of these results are presented in this document with conclusions related to reactor safe operation

  4. Analyse quantitative du réseau hydrographique du bassin versant du Slănic (Roumanie

    Directory of Open Access Journals (Sweden)

    Florina Grecu

    2007-12-01

    Full Text Available L'étude porte sur le bassin versant du Slănic, un affluent du Buzău. Ce bassin de taille relativement réduite (433 km2 est situé dans la région des Carpates et des Subcarpates de la Courbure, région très active sur le plan sismique. Du point de vue lithologique, le bassin du Slănic correspond à des flyschs paléogènes et à des molasses mio-pliocènes. Ces roches peu résistantes ont facilité une forte érosion du relief. Actuellement, les précipitations présentent souvent une forte intensité, et elles se produisent fréquemment après des périodes de sécheresse. Elles sont ainsi très agressives et déclenchent une érosion intense. L'analyse de quelques paramètres morphométriques [grand nombre de segments de cours d'eau d'ordres 1 (5230 et 2 (944 ; densité élevée des segments par rapport à la superficie du bassin (environ 15 segments / km2 ; longueur moyenne réduite des segments d'ordre 1 (260 m par rapport à ceux d'ordre 2 (530 m] s'accorde avec des temps de concentration des eaux courts et une forte énergie des écoulements. La vitesse de réaction aux précipitations des segments d'ordres inférieurs est en outre favorisée par la répartition spatiale des pluies et par les conditions lithologiques.The study is focused on the Slănic basin which has a small size (433 km2. The hydrographical basin of Slănic, situated in the Carpathian and Subcarpathian Curvature, a very active from neotectonical viewpoint area, is a part of the Buzău basin. From a petrographic point of view, the Slănic hydrographic basin belongs to the paleogen flysch deposits (within the Carpathian sector and to the mio-pliocen molasse (within the Subcarpathian area latter formed by predominantely friable rocks which have encouraged deep fragmentation of the relief. Actual rainfalls are often very intensive, and they frequently occur after dry seasons. The analysis of morphometric parameters shows many elementary segments of first

  5. A Numerical Simulator for Noise Calibration Studies

    OpenAIRE

    Racette, Paul; Clune, Tom; Wong, Mark; Walker, David; Coakley, Kevin; Splett, Jolene; Rivers, Derick; Leonard, Robert; Boone, Ed

    2012-01-01

    Frequent calibration using noise references is used to reduce the effects of time varying fluctuations that naturally occur within sensitive radiometer receivers. Over the years, calibration architectures and processing algorithms have become more sophisticated. Predicting the performance of a given calibration architecture often requires expensive prototyping of hardware; optimizing processing algorithms for nonstationary fluctuations is a challenge. Measurement uncertainty is a figure of me...

  6. 48 CFR 908.7113 - Calibration services.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 5 2010-10-01 2010-10-01 false Calibration services. 908... ACQUISITION PLANNING REQUIRED SOURCES OF SUPPLIES AND SERVICES Acquisition of Special Items 908.7113 Calibration services. Orders for calibration services may be placed with the National Institute of...

  7. MODIS Radiometric Calibration and Uncertainty Assessment

    Science.gov (United States)

    Xiong, Xiaoxiong; Chiang, Vincent; Sun, Junqiang; Wu, Aisheng

    2011-01-01

    Since launch, Terra and Aqua MODIS have collected more than II and 9 years of datasets for comprehensive studies of the Earth's land, ocean, and atmospheric properties. MODIS observations are made in 36 spectral bands: 20 reflective solar bands (RSB) and 16 thermal emissive bands (TEB). Compared to its heritage sensors, MODIS was developed with very stringent calibration and uncertainty requirements. As a result, MODIS was designed and built with a set of state of the art on-board calibrators (OBC), which allow key sensor performance parameters and on-orbit calibration coefficients to be monitored and updated if necessary. In terms of its calibration traceability, MODIS RSB calibration is reflectance based using an on-board solar diffuser (SD) and the TEB calibration is radiance based using an on-board blackbody (BB). In addition to on-orbit calibration coefficients derived from its OBC, calibration parameters determined from sensor pre-launch calibration and characterization are used in both the RSB and TEB calibration and retrieval algorithms. This paper provides a brief description of MODIS calibration methodologies and discusses details of its on-orbit calibration uncertainties. It assesses uncertainty contributions from individual components and differences between Terra and Aqua MODIS due to their design characteristics and on-orbit periormance. Also discussed in this paper is the use of MODIS LIB uncertainty index CUI) product.

  8. New method for calibration of sun photometers

    Institute of Scientific and Technical Information of China (English)

    H.H.Asadov; I.G.Chobanzadeh

    2009-01-01

    A new method for calibration of sun photometers based on Bouguer-Beer law is proposed.The developed basic equation of calibration makes it possible to formulate the derivative methods of calibration on the basis of photometric measurements upon optical air masses,the ratio of which is an integer number.

  9. Net analyte signal calculation for multivariate calibration

    NARCIS (Netherlands)

    Ferre, J.; Faber, N.M.

    2003-01-01

    A unifying framework for calibration and prediction in multivariate calibration is shown based on the concept of the net analyte signal (NAS). From this perspective, the calibration step can be regarded as the calculation of a net sensitivity vector, whose length is the amount of net signal when the

  10. Capteurs ou Senseurs et la théorie du A QUOI ?

    OpenAIRE

    Bonton Pierre

    2013-01-01

    Un senseur au sens évaluer les sensations peut-il remplacer un capteur au sens donner une valeur juste de la mesure. Le capteur a besoin d’être calibré, le senseur ne s’intéresse qu’au quoi de l’objet. Cinq membres d’une même société s’interrogent sur l’évolution du capteur vers le senseur. Chacun a une spécialité soit sur le savoir, sur le savoir faire, sur le savoir faire faire, sur le savoir être ou sur le faire savoir. L’histoire se passe sur 20 ans à partir de 2013…...

  11. Capteurs ou Senseurs et la théorie du A QUOI ?

    Directory of Open Access Journals (Sweden)

    Bonton Pierre

    2013-07-01

    Full Text Available Un senseur au sens évaluer les sensations peut-il remplacer un capteur au sens donner une valeur juste de la mesure. Le capteur a besoin d’être calibré, le senseur ne s’intéresse qu’au quoi de l’objet. Cinq membres d’une même société s’interrogent sur l’évolution du capteur vers le senseur. Chacun a une spécialité soit sur le savoir, sur le savoir faire, sur le savoir faire faire, sur le savoir être ou sur le faire savoir. L’histoire se passe sur 20 ans à partir de 2013…

  12. Monique Cottret, Caroline Galland, (dirs.) Les damnés du ciel et de la terre

    OpenAIRE

    Vidal, Daniel

    2012-01-01

    Du feu dans les yeux, du feu dans la bouche, du feu dans les entrailles, du feu dans la gorge, du feu dans les narines, du feu au-dedans, du feu au-dehors, du feu en dessous, du feu au-dessus; du feu de toutes parts. Ah! malheureux, vous serez comme des tisons enflammés au milieu de ce feu. Ainsi s’énonce au xvie siècle, le châtiment éternel que Dieu, par la voix de ses confesseurs, prêtres ou théologiens, réserve à la légion de ceux qui se sont déportés hors l’Église, seule dépositaire du sa...

  13. Preparation of the ATLAS experiment in the LHC proton collider, performances of the electromagnetic calorimeter and its potentialities for the top quark; Preparation de l'experience ATLAS aupres du futur grand collisionneur de protons LHC: performances du calorimetre electromagnetique et potentiels pour la physique du quark top

    Energy Technology Data Exchange (ETDEWEB)

    Hubaut, F

    2007-03-15

    ATLAS is the biggest and the more complex detector ever built, it will operate on the LHC and is the outcome of a huge international collaboration of 2000 physicists. This document reviews the theoretical and experimental achievements of one of them, his collaboration spread over 7 years and has followed 2 axis. First, the design, construction and test of the electromagnetic calorimeter of ATLAS and secondly, the development of analysis strategies in the physics of the top quark. The expected important production of top quarks in LHC will allow an accurate measurement of the properties of this particle and in the same way will provide new testing areas for the standard model. The top quark, being extremely massive, might play a significant role in the mechanism of electro-weak symmetry breaking. This document is organized into 5 chapters: 1) ATLAS detector, performance and progress, 2) the optimization of the energy measurement with the electromagnetic calorimeter, 3) the performance of the electromagnetic calorimeter, 4) the physics of the top quark, and 5) the potentialities of ATLAS in the top quark sector. This document presented before an academic board will allow its author to manage research works and particularly to tutor thesis students. (A.C.)

  14. Un Genevois coopte a la tete du Front islamique du salut

    CERN Multimedia

    Merckling, N

    2002-01-01

    "Le Front islamique du salut (FIS), a nomme a la tete de ce parti fondamentaliste un resident genevois, Mourad Dhani, chois parmi trois candidats. Ce physicien algerien est arrive a Geneve il y a 14 ans pour travailler au CERN (1 page).

  15. La reconstruction du sourcil par greffon composite du cuir chevelu: une astuce pour faciliter la technique

    Science.gov (United States)

    El Omari, Mounia; El Mazouz, Samir; Gharib, Noureddine; EL Abbassi, Abdallah

    2015-01-01

    Les sourcils jouent un rôle important dans l’équilibre esthétique du visage. Leur reconstruction ou ophriopoïése, après séquelle de brûlure fait partie intégrante du programme de réhabilitation de la face brûlée. Plusieurs techniques ont été décrites. Nous insistons ici sur l'intérêt d'une technique simple, à la portée de tous les chirurgiens, et dont la méthode et les résultats peuvent être améliorés par un dessin bien planifié des zones donneuse et receveuse: la greffe composite prélevée au niveau du cuir chevelu dessinée à l'aide d'un calque du sourcil controlatéral. PMID:26401195

  16. Sciences du comportement et de la communication: comportement du pharmacien en officine et comportement des usagers

    OpenAIRE

    Roosen, Marie

    1993-01-01

    Le comportement du pharmacien indique-t-il à l'usager ses rôles potentiels en éducation pour la santé dans un espace de santé ou traduit-il surtout un rôle d'opérateur commercial dans un espace de vente ?

  17. Prise en compte du spirituel et nouvelles représentations du soin

    OpenAIRE

    Chatel, Tanguy

    2006-01-01

    International audience To what extended comprehension of "care", the spiritual care in the secularized and public context of palliative care may lead us ? A quelles nouvelles représentations du soin nous convie une prise en compte de la souffrance spirituelle dans le contexte laïque et public des soins palliatifs ?

  18. LE MARCHE MONDIAL DU VIN ET LES NOUVELLES ORIENTATIONS DU MARKETING

    Directory of Open Access Journals (Sweden)

    Epuran Gheorghe

    2008-05-01

    Full Text Available Le marché mondial du vin est caractérisé par un développement sans précédent en ce qui concerne la production, mais aussi l’aire géographique qu’il comprend. La surproduction qui a tendance ŕ dégénérer en une crise est due premičrement ŕ l’apparition de nouveaux acteurs sur ce marché, c’est-ŕ-dire les pays du nouveau monde du vin: les Etats-Unis, le Chili, l’Afrique de Sud, l’Australie. Dans ce contexte, les grands producteurs traditionnels de l’Europe sont soumis ŕ une forte pression concurrentielle aussi bien sur leurs marchés qu’ŕ l’extérieur. Męme si en matičre d’image et de notoriété les vins de ces pays sont restés encore trčs connus, les pays du nouveau monde des vins ont réussi, par un marketing «ŕ l’américain», ŕ pénétrer en force sur plusieurs marchés, inclusivement sur les pays qui étaient pas traditionnellement consommateurs de vins (la Russie, la Chine, etc..

  19. Cyber Dhaba: un kiosque internet en Inde du Nord

    CERN Multimedia

    2002-01-01

    Il y a deux ans, l'association Orient Yourself installait un PC connecté sous un banyan sacré, dans un village agricole du Rajasthan (Inde du Nord). Claire Dixsaut dirige ELSE, elle est membre fondateur de l'association Orient Yourself.

  20. Role of Du Channel in Treating Senile Dementia

    Institute of Scientific and Technical Information of China (English)

    Lu Fan

    2006-01-01

    @@ The author believes that senile dementia is very closely related to not only deficiency of the liver and kidney, but also Eight Extra Channels, Du Channel in particular. Nourishing the liver and kidney and clearing Du Channel in the treatment can greatly enhance the therapeutic effect.