Hermes (Rbpms) is a Critical Component of RNP Complexes that Sequester Germline RNAs during Oogenesis.

Science.gov (United States)

Aguero, Tristan; Zhou, Yi; Kloc, Malgorzata; Chang, Patrick; Houliston, Evelyn; King, Mary Lou

2016-03-01

The germ cell lineage in Xenopus is specified by the inheritance of germ plasm that assembles within the mitochondrial cloud or Balbiani body in stage I oocytes. Specific RNAs, such as nanos1 , localize to the germ plasm. nanos1 has the essential germline function of blocking somatic gene expression and thus preventing Primordial Germ Cell (PGC) loss and sterility. Hermes/Rbpms protein and nanos RNA co-localize within germinal granules, diagnostic electron dense particles found within the germ plasm. Previous work indicates that nanos accumulates within the germ plasm through a diffusion/entrapment mechanism. Here we show that Hermes/Rbpms interacts with nanos through sequence specific RNA localization signals found in the nanos -3'UTR. Importantly, Hermes/Rbpms specifically binds nanos , but not Vg1 RNA in the nucleus of stage I oocytes. In vitro binding data show that Hermes/Rbpms requires additional factors that are present in stage I oocytes in order to bind nanos1 . One such factor may be hnRNP I, identified in a yeast-2-hybrid screen as directly interacting with Hermes/Rbpms. We suggest that Hermes/Rbpms functions as part of a RNP complex in the nucleus that facilitates selection of germline RNAs for germ plasm localization. We propose that Hermes/Rbpms is required for nanos RNA to form within the germinal granules and in this way, participates in the germline specific translational repression and sequestration of nanos RNA .

Hadronization in deep inelastic scattering at HERMES

International Nuclear Information System (INIS)

Muccifora, V

2004-01-01

Recent results from HERMES in the hadron leptoproduction of nuclei are presented. The possible interpretations in terms of medium modifications of the parton fragmentation function and the implications on the parton energy loss are discussed

The HERMES dual-radiator RICH detector

CERN Document Server

Jackson, H E

2003-01-01

The HERMES experiment emphasizes measurements of semi-inclusive deep-inelastic scattering. Most of the hadrons produced lie between 2 and 10 GeV, a region in which it had not previously been feasible to separate pions, kaons, and protons with standard particle identification (PID) techniques. The recent development of new clear, large, homogeneous and hydrophobic silica aerogel material with a low index of refraction offered the means to apply RICH PID techniques to this difficult momentum region. The HERMES instrument uses two radiators, C sub 4 F sub 1 sub 0 , a heavy fluorocarbon gas, and a wall of silica aerogel tiles. A lightweight spherical mirror constructed using a newly perfected technique to make resin-coated carbon-fiber surfaces of optical quality provides optical focusing on a photon detector consisting of 1934 photomultiplier tubes (PMT) for each detector half. The PMT array is held in a soft steel matrix to provide shielding against the residual field of the main spectrometer magnet. Ring recon...

Exclusive {pi}{sup 0} production at HERMES. Detection - simulation - analysis

Energy Technology Data Exchange (ETDEWEB)

Vandenbroucke, A.

2007-02-15

In this thesis the experimental study of the process (vector)e(vector)p((vector)d){yields}e'{pi}{sup 0}p(d) in th HERMES experiment at the HERA storage ring is described. Especially the electron beam, the polarized target, the detector components of the HERMES spectrometer and the silicon recoil detector are described, whereby especially tracking and particle identification is considered. Furthermore a Monte Carlo simulation of this experiment with special regards to the calorimeter is presented. (HSI)

The TESS-HERMES survey data release 1

DEFF Research Database (Denmark)

Sharma, Sanjib; Stello, Dennis; Buder, Sven

2018-01-01

-Australian Telescope as part of the TESS-HERMES survey. Comparing our results with the TESS Input Catalogue (TIC) shows that the TIC is generally efficient in separating dwarfs and giants, but it has flagged more than 100 cool dwarfs (T-eff

The HERMES recoil photon-detector and nuclear p{sub t}-Broadening at HERMES

Energy Technology Data Exchange (ETDEWEB)

Haarlem, Y. van

2007-09-15

The first part of this work consists of hardware research and development done in order to construct and test a photon-detector as one of the three detectors of the HERMES recoil detector. The HERMES recoil detector consists of a target cell, a silicon-detector, a scintillating fiber tracker, and a photon-detector. All are inside a super-conducting magnet. The silicon detector uses energy deposition to determine the momentum of the particle because in its energy range the energy deposition is an unambiguous function of the momentum of the particle. The scintillating fiber tracker is located outside the beam-vacuum and is surrounded by the photon-detector. It consists of two barrels with layers of scintillating fibers. It detects particles by converting their energy deposition into light. It measures two space points of a charged particle and from the bending of the assigned track (in the magnetic field provided by the super-conducting magnet) a momentum measurement can be derived. The photon-detector is located between the scintillating fiber tracker and the magnet. It consists (from the inside out) of three layers of tungsten showering material followed by scintillating strips. The second part of this work is an analysis performed concerning the transverse momentum broadening of hadrons produced in deep-inelastic scattering on a nuclear target compared to a D target. (orig.)

DVCS at HERMES. The recoil detector and transverse target spin asymmetries

Energy Technology Data Exchange (ETDEWEB)

Murray, M.J.

2008-02-15

The HERMES experiment is a large forward angle spectrometer located at the HERA accelerator ring at DESY, Hamburg. One of the most exciting topics studied at HERMES is Deeply Virtual Compton Scattering (DVCS) which is the simplest interaction that provides a gateway for access to Generalised Parton Distributions (GPDs). GPDs are a theoretical framework which can be used to calculate the total angular momentum of the quarks in the nucleon. As such, they provide one piece of the puzzle of nucleonic spin structure. In 2005, HERMES was upgraded in the target region with a Recoil Detector that allows it to make truly exclusive measurements of the DVCS interaction for the first time. The design and construction of the Recoil Detector is discussed herein, in addition to a complete analysis of the Transverse Target Spin Asymmetry (TTSA) in DVCS. Experimental facilities that enable measurement of this asymmetry are rare. The importance of the information on the TTSA from HERMES is made yet greater as the transversely polarised target that allows the asymmetry to be measured has been replaced by an unpolarised target. This was to allow the Recoil Detector to be installed. The final stage of this thesis shows a model-dependent method for constraining the angular momentum of the quarks in the nucleon and speculates as to the other pieces of the spin puzzle. (orig.)

DVCS at HERMES. The recoil detector and transverse target spin asymmetries

International Nuclear Information System (INIS)

Murray, M.J.

2008-02-01

The HERMES experiment is a large forward angle spectrometer located at the HERA accelerator ring at DESY, Hamburg. One of the most exciting topics studied at HERMES is Deeply Virtual Compton Scattering (DVCS) which is the simplest interaction that provides a gateway for access to Generalised Parton Distributions (GPDs). GPDs are a theoretical framework which can be used to calculate the total angular momentum of the quarks in the nucleon. As such, they provide one piece of the puzzle of nucleonic spin structure. In 2005, HERMES was upgraded in the target region with a Recoil Detector that allows it to make truly exclusive measurements of the DVCS interaction for the first time. The design and construction of the Recoil Detector is discussed herein, in addition to a complete analysis of the Transverse Target Spin Asymmetry (TTSA) in DVCS. Experimental facilities that enable measurement of this asymmetry are rare. The importance of the information on the TTSA from HERMES is made yet greater as the transversely polarised target that allows the asymmetry to be measured has been replaced by an unpolarised target. This was to allow the Recoil Detector to be installed. The final stage of this thesis shows a model-dependent method for constraining the angular momentum of the quarks in the nucleon and speculates as to the other pieces of the spin puzzle. (orig.)

Purification, crystallization and preliminary crystallographic analysis of the Hermes transposase

International Nuclear Information System (INIS)

Perez, Zhanita N.; Musingarimi, Primrose; Craig, Nancy L.; Dyda, Fred; Hickman, Alison Burgess

2005-01-01

Upon purification, an N-terminally deleted version of the Hermes transposase exists in solution as a mixture of two species that are approximately hexameric and dimeric. Crystals have been obtained of the smaller species that diffract to 2.1 Å resolution. DNA transposition is the movement of a defined segment of DNA from one location to another. Although the enzymes that catalyze transposition in bacterial systems have been well characterized, much less is known about the families of transposase enzymes that function in higher organisms. Active transposons have been identified in many insect species, providing tools for gene identification and offering the possibility of altering the genotypes of natural insect populations. One of these active transposons is Hermes, a 2749-base-pair element from Musca domestica that encodes its own transposase. An N-terminally deleted version of the Hermes transposase (residues 79–612) has been overexpressed and purified, and crystals that diffract to 2.1 Å resolution have been obtained at 277 K by the hanging-drop method

HERMES probabilistic risk assessment. Pilot study

International Nuclear Information System (INIS)

Parisot, F.; Munoz, J.

1993-01-01

The study was performed in 1989 of the contribution of probabilistic analysis for the optimal construction of system safety status in aeronautical and European nuclear industries, shows the growing trends towards incorporation of quantitative safety assessment and lead to an agreement to undertake a prototype proof study on Hermes. The main steps of the study and results are presented in the paper

Hermes: um modelo para acessibilidade ubíqua dedicado à deficiência auditiva

Directory of Open Access Journals (Sweden)

Carlos Felipe Rocha Carneiro

2016-11-01

Full Text Available Nota-se, atualmente, que o avanço da tecnologia e a crescente quantidade de dispositivos móveis vêm estimulando o uso desse tipo de tecnologia. Porém, esses dispositivos não estão prontos para atender pessoas com determinados tipos de deficiência, especificamente o deficiente auditivo. O presente trabalho tem por objetivo propor um modelo de suporte ao deficiente auditivo chamado Hermes. O Hermes no que diz respeito aos trabalhos relacionados é o único a apresentar sensibilidade ao contexto, pois nenhum dos modelos avaliados tem essa característica. Além disso, Hermes suporta o reconhecimento de som, a localização de recurso e, por fim, demonstra suporte a trilhas. A avaliação do modelo foi baseada em cenários, partindo de um recurso selecionado pelo usuário, mostrando que o aplicativo oferece suporte para acessibilidade. O Hermes foi avaliado por dez usuários, um deles deficiente auditivo. Os avaliadores aprovaram com 88% o aplicativo no quesito que buscou avaliar a facilidade percebida de uso, e com 90% o quesito de utilidade percebida.

Recent results from COMPASS and HERMES

Energy Technology Data Exchange (ETDEWEB)

Schnell, Gunar [DESY, Zeuthen (Germany)

2010-07-01

Deep-inelastic lepton scattering has for a long time been a valuable tool to examine the structure of nucleons. Both the COMPASS and the HERMES collaborations have followed up on this long tradition by scattering charged leptons from polarized and unpolarized targets. The recent results from both experiments are reviewed and, when applicable, compared; with emphasis given to polarized quark distributions and 3D nucleon tomography.

Studies of spin relaxation and recombination at the HERMES hydrogen/deuterium gas target

International Nuclear Information System (INIS)

Baumgarten, C.

2000-09-01

The HERMES (HERA measurement of spin) experiment is located in the eastern straight section of the HERA storage ring at DESY in Hamburg. It is designed to study the spin structure of the nucleons by deep inelastic scattering of polarized positrons resp. electrons provided by the HERA storage ring at 27.5 GeV impingingon the nucleons of internal polarized gas targets. The setup of the HERMES experiment is shown. First results are the measurement of the spin structure functions g 1 n with the polarized 3 He target (1995) and of g 1 p with polarized atomic hydrogen target, which was operated in 1996 and 1997. Beneath the inclusive physics, the possibility to detect and identify hadronic scattering products allows the measurement of semi-inclusive processes with the central item of the HERMES physics program. (orig.)

Hermes: Seamless delivery of containerized bioinformatics workflows in hybrid cloud (HTC) environments

Science.gov (United States)

Kintsakis, Athanassios M.; Psomopoulos, Fotis E.; Symeonidis, Andreas L.; Mitkas, Pericles A.

Hermes introduces a new "describe once, run anywhere" paradigm for the execution of bioinformatics workflows in hybrid cloud environments. It combines the traditional features of parallelization-enabled workflow management systems and of distributed computing platforms in a container-based approach. It offers seamless deployment, overcoming the burden of setting up and configuring the software and network requirements. Most importantly, Hermes fosters the reproducibility of scientific workflows by supporting standardization of the software execution environment, thus leading to consistent scientific workflow results and accelerating scientific output.

3He polarimetry in the HERMES experiment

International Nuclear Information System (INIS)

Anon.

1998-01-01

We describe two polarimetry techniques used in the HERMES experiment. They are both based on the principle of measuring the rate and circular polarization of photons emitted from excited states of target atoms and can be used together to directly access information regarding the target atoms which interact with the beam. copyright 1998 American Institute of Physics

Hermes: Seamless delivery of containerized bioinformatics workflows in hybrid cloud (HTC environments

Directory of Open Access Journals (Sweden)

Athanassios M. Kintsakis

2017-01-01

Full Text Available Hermes introduces a new “describe once, run anywhere” paradigm for the execution of bioinformatics workflows in hybrid cloud environments. It combines the traditional features of parallelization-enabled workflow management systems and of distributed computing platforms in a container-based approach. It offers seamless deployment, overcoming the burden of setting up and configuring the software and network requirements. Most importantly, Hermes fosters the reproducibility of scientific workflows by supporting standardization of the software execution environment, thus leading to consistent scientific workflow results and accelerating scientific output.

Prometeu contra Hermes: o lugar do design no imaginário contemporâneo

Directory of Open Access Journals (Sweden)

Marcos Beccari

2017-09-01

Full Text Available Este artigo propõe uma reflexão sobre o imaginário contemporâneo, tomando o design como vetor central e duas figuras míticas, Hermes e Prometeu, como coordenadas principais. De início, tecemos algumas considerações acerca das bases teóricas que amparam a abordagem aqui proposta e, em seguida, indicamos o modo como as figuras de Prometeu e Hermes conduzem boa parte da dinâmica sociocultural. Na sequência, analisamos o paradigma pós-prometeico que Bruno Latour identifica a partir de cinco conotações do termo design. Concluímos, por fim, que os mitos de Hermes e Prometeu se encontram implicados um no outro e que o design expressa, no imaginário contemporâneo, essa correlação.

The search for exotic baryons at the HERMES experiment

International Nuclear Information System (INIS)

Deconinck, Wouter

2008-07-01

One of the interesting questions of Quantum Chromodynamics, the theory that governs the interactions between quarks and gluons, has been whether it is possible to observe hadrons which can not be explained as a combination of only two or three valence quarks. In numerous searches the existence of these exotic hadrons could not be confirmed. Recently, calculations based on the quark soliton model predicted the narrow exotic baryons Θ + and Ξ -- . A narrow resonance identified as the Θ + was observed by several experiments at the predicted mass of 1540 MeV, but later followed by several dedicated experiments that could not confirm these positive results. At the HERMES experiment a search for the quasi-real photoproduction of the exotic baryon Θ + on a deuterium target and the subsequent decay through pK 0 S → pπ + π - revealed a narrow resonance in the pK 0 S invariant mass distribution at 1528 MeV. In the search for the corresponding antiparticle Ξ -- the result is consistent with zero events. In this thesis we present the search for the exotic baryon Ξ -- on a deuterium target in the data sample used for the observation of the Θ + . An upper limit on the cross section of the exotic baryon Ξ -- is determined. The search for the exotic baryon Θ + on hydrogen and deuterium targets at the HERMES experiment is extensively discussed. The event mixing method can be used to estimate the distribution of background events. Several difficulties with this method were addressed, but the background description in the case of the exotic baryon Θ + remains unconvincing. Between the years 2002 and 2005 the HERMES experiment operated with a magnetic holding field around the hydrogen target. A method for the reconstruction of displaced vertices in this field was developed. The data collected during the years 2006 and 2007 offer an integrated luminosity that is several times higher than in previous data sets. After investigating all data sets collected with the HERMES

The final inclusive and semi-inclusive longitudinal double-spin asymmetries at HERMES. Extraction of quark helicity distributions of the nucleon from deep-inelastic scattering

Energy Technology Data Exchange (ETDEWEB)

Kravchenko, Polina

2010-10-15

The thesis focuses on two aspects of the HERMES data analysis: the measurement of the semi-inclusive double spin asymmetries and the extraction of quark helicity distributions and quark polarizations of the nucleon from deep-inelastic scattering, as a possible interpretation of the HERMES data. The asymmetries are presented using all possible and accessible information about the HERMES data, including the latest systematic studies provided during the last years by HERMES collaboration. (orig.)

Deeply virtual Compton scattering off longitudinally polarised protons at HERMES

International Nuclear Information System (INIS)

Mahon, David Francis

2010-03-01

This thesis details the simultaneous extraction of three polarisation-dependent asymmetries in the distribution of real photons from the ep→epγ interaction and its indistinguishable deeply virtual Compton scattering and Bethe-Heitler processes at the HERMES fixed-target experiment at Desy. The data analysed were taken using a longitudinally polarised 27.57 GeV positron beam incident on a longitudinally polarised hydrogen gas target. The extracted asymmetries include two single-spin asymmetries A UL and A LU which depend on the polarisation of the target and beam respectively, averaged over all other polarisation states. The double-spin asymmetry A LL dependent on the product of the beam and target polarisations is extracted for the first time. The asymmetry amplitudes extracted relate to combinations of Generalised Parton Distributions (GPDs), predominantly H and H. The extracted amplitudes are presented across the HERMES kinematic range alongside theoretical predictions from a GPD model based on double distributions. Large sin φ and cos(0φ) amplitudes are observed for A UL and A LL respectively, with an unexpectedly large sin(2φ) amplitude for A UL . The results for the A UL and A LL asymmetries are broadly compatible with theory predictions, and the extracted A LU amplitudes are compatible with HERMES results extracted from a significantly larger data set. It is foreseen that these results will form input to future global data-based GPD models which aim to provide a better understanding of GPDs. (orig.)

Power flow evaluations for HERMES III

International Nuclear Information System (INIS)

Smith, D.L.; Ramirez, J.J.; Corley, J.P.; Hasti, D.E.

1985-01-01

A study has been conducted to evaluate the transfer of electro-magnetic pulses from water dielectric strip transmission lines into a diode insulator stack. The HERMES III Scale Model Experiments (HERMEX) included single-stage diodes as well as multistage models in which a variety of parallel/series combinations of strip transmission lines (strip lines) were used to evaluate the voltage adding efficiency at the diode. A technique has been established to estimate an equivalent shunt impedance across the diode due to the nearby uncharged water volume

Overview of HERMES results

Directory of Open Access Journals (Sweden)

Van Hulse Charlotte

2016-01-01

Full Text Available The HERMES experiment has collected a wealth of deep-inelastic scattering data using the 27.6 GeV polarized lepton beam at HERA and various pure gas targets, both unpolarized and polarized. This allowed for a series of diverse and unique measurements. Among them are measurements that provide information on the threedimensional structure of the nucleon, both in momentum space and in position space. Results of measurements of exclusive ω production on an unpolarized and transversely polarized nucleon target, sensitive to the distribution in transverse-position and longitudinalmomentum space, are discussed as well as the three-dimensional extraction of azimuthal asymmetries measured in semi-inclusive deep-inelastic scattering, sensitive to twist-2 and twist-3 distributions in three-dimensional momentum space.

The search for exotic baryons at the HERMES experiment

Energy Technology Data Exchange (ETDEWEB)

Deconinck, Wouter

2008-07-15

One of the interesting questions of Quantum Chromodynamics, the theory that governs the interactions between quarks and gluons, has been whether it is possible to observe hadrons which can not be explained as a combination of only two or three valence quarks. In numerous searches the existence of these exotic hadrons could not be confirmed. Recently, calculations based on the quark soliton model predicted the narrow exotic baryons {theta}{sup +} and {xi}{sup --}. A narrow resonance identified as the {theta}{sup +} was observed by several experiments at the predicted mass of 1540 MeV, but later followed by several dedicated experiments that could not confirm these positive results. At the HERMES experiment a search for the quasi-real photoproduction of the exotic baryon {theta}{sup +} on a deuterium target and the subsequent decay through pK{sup 0}{sub S} {yields} p{pi}{sup +}{pi}{sup -} revealed a narrow resonance in the pK{sup 0}{sub S} invariant mass distribution at 1528 MeV. In the search for the corresponding antiparticle {xi}{sup --} the result is consistent with zero events. In this thesis we present the search for the exotic baryon {xi}{sup --} on a deuterium target in the data sample used for the observation of the {theta}{sup +}. An upper limit on the cross section of the exotic baryon {xi}{sup --} is determined. The search for the exotic baryon {theta}{sup +} on hydrogen and deuterium targets at the HERMES experiment is extensively discussed. The event mixing method can be used to estimate the distribution of background events. Several difficulties with this method were addressed, but the background description in the case of the exotic baryon {theta}{sup +} remains unconvincing. Between the years 2002 and 2005 the HERMES experiment operated with a magnetic holding field around the hydrogen target. A method for the reconstruction of displaced vertices in this field was developed. The data collected during the years 2006 and 2007 offer an integrated

Detection of exclusive reactions in the Hermes Recoil Fiber Tracker

International Nuclear Information System (INIS)

Keri, Tibor

2008-08-01

The standard model of particle physics describes successfully the fundamental constituents and forces in our world; nevertheless, many details of the subatomic world are still beyond the scope of theoretical predictions. The internal structure of the nucleon has been investigated in detail and it was found that the nucleon spin budget, i.e. the composition of the nucleon spin by the spin and orbital angular momentum of quarks and gluons is not yet understood. It has been measured that the intrinsic quark spin contribution is only about 30% of the total spin of the nucleon. A recently developed formalism allows to describe the internal structure of the nucleon by so-called GPDs (Generalized Parton Distributions) in a more complete way than the previously used PDFs (Parton Density Functions). The GPDs are linked by the Ji sum rule to the angular momentum contributions of quarks and gluons. These GPDs can be accessed by the investigation of hard exclusive reactions. DVCS (deeply virtual Compton scattering) is the cleanest exclusive reaction to determine some of these distributions, using lepton beams with different helicity states and charges. HERMES (HERA measurements of spin) is one of the experiments which were carried out to complete the information about the nucleon spin budget. It is located at HERA which is an e ± -p-collider at DESY but uses only the polarized electron- and positron-beam, which is scattered off a gaseous internal target. The HERMES forward spectrometer consists of a set of detectors that are used for tracking, while another set of detectors provides information on particle identification and triggering. In the first phase of HERMES, only forward going particles were detected. Exclusive reactions have been measured using a missing invariant mass technique. In order to improve exclusivity and to enhance the resolution of kinematic variables the HERMES collaboration decided to remove the equipment for the polarized target and to install the RD

Detection of exclusive reactions in the Hermes Recoil Fiber Tracker

Energy Technology Data Exchange (ETDEWEB)

Keri, Tibor

2008-08-15

The standard model of particle physics describes successfully the fundamental constituents and forces in our world; nevertheless, many details of the subatomic world are still beyond the scope of theoretical predictions. The internal structure of the nucleon has been investigated in detail and it was found that the nucleon spin budget, i.e. the composition of the nucleon spin by the spin and orbital angular momentum of quarks and gluons is not yet understood. It has been measured that the intrinsic quark spin contribution is only about 30% of the total spin of the nucleon. A recently developed formalism allows to describe the internal structure of the nucleon by so-called GPDs (Generalized Parton Distributions) in a more complete way than the previously used PDFs (Parton Density Functions). The GPDs are linked by the Ji sum rule to the angular momentum contributions of quarks and gluons. These GPDs can be accessed by the investigation of hard exclusive reactions. DVCS (deeply virtual Compton scattering) is the cleanest exclusive reaction to determine some of these distributions, using lepton beams with different helicity states and charges. HERMES (HERA measurements of spin) is one of the experiments which were carried out to complete the information about the nucleon spin budget. It is located at HERA which is an e{sup {+-}}-p-collider at DESY but uses only the polarized electron- and positron-beam, which is scattered off a gaseous internal target. The HERMES forward spectrometer consists of a set of detectors that are used for tracking, while another set of detectors provides information on particle identification and triggering. In the first phase of HERMES, only forward going particles were detected. Exclusive reactions have been measured using a missing invariant mass technique. In order to improve exclusivity and to enhance the resolution of kinematic variables the HERMES collaboration decided to remove the equipment for the polarized target and to install

History of HERMES III diode to z-pinch breakthrough and beyond :

Energy Technology Data Exchange (ETDEWEB)

Sanford, Thomas Williamlou.

2013-04-01

HERMES III and Z are two flagship accelerators of Sandias pulsed-power program developed to generate intense -ray fields for the study of nuclear radiation effects, and to explore high energy-density physics (including the production of intense x-ray fields for Inertia Confinement Fusion [ICF]), respectively. A diode at the exit of HERMES III converts its 20-MeV electron beam into -rays. In contrast, at the center of Z, a z-pinch is used to convert its 20-MA current into an intense burst of x-rays. Here the history of how the HERMES III diode emerged from theoretical considerations to actual hardware is discussed. Next, the reverse process of how the experimental discovery of wire-array stabilization in a z-pinch, led to a better theory of wirearray implosions and its application to one of the ICF concepts on Z--the DH (Dynamic Hohlraum) is reviewed. Lastly, the report concludes with how the unexpected axial radiation asymmetry measured in the DH is understood. The first discussion illustrates the evolution of physics from theory-to-observationto- refinement. The second two illustrate the reverse process of observationto- theory-to refinement. The histories are discussed through the vehicle of my research at Sandia, illustrating the unique environment Sandia provides for personal growth and development into a scientific leader.

Exclusive φ meson production in HERMES

International Nuclear Information System (INIS)

Golembiovskaya, Mayya

2014-03-01

In the present work exclusive φ meson leptoproduction at HERMES experiment in DESY was studied using the data collected at HERA accelerator in the period from 1998 till 2000 and from 2006 till 2007 years. In the analysis unpolarized and longitudinally polarized hydrogen and deuteron targets were used, the beam consisted of longitudinally polarized leptons. Via measurement of the angular and momentum distribution of the φ meson decay products 23 spin density matrix elements (SDMEs) for the φ meson were obtained. The number of SDMEs was defined by the experiment conditions, e.g. by the beam and target polarization directions. For the mentioned time period φ meson SDMEs were defined at HERMES for the first time. The quantities U 1 , U 2 and U 3 which can be used to check presence of unnatural parity exchange (UPE) mechanism in phi meson production were calculated from SDMEs. All the results were obtained in 3 kinematic bins of Q 2 , 4 kinematic bins of t' and for the integrated kinematics. No statistically significant difference between the results for hydrogen and deuteron targets was observed. The UPE quantities were found to be zero within 2 σ for the integrated kinematics, indicating negligible contribution of UPE for the φ meson production which is in agreement with theory predictions. The test of s-channel helicity conservation hypothesis via comparison of corresponding SDME values showed helicity conservation for the φ meson production.

Exclusive φ meson production in HERMES

Energy Technology Data Exchange (ETDEWEB)

Golembiovskaya, Mayya

2014-03-15

In the present work exclusive φ meson leptoproduction at HERMES experiment in DESY was studied using the data collected at HERA accelerator in the period from 1998 till 2000 and from 2006 till 2007 years. In the analysis unpolarized and longitudinally polarized hydrogen and deuteron targets were used, the beam consisted of longitudinally polarized leptons. Via measurement of the angular and momentum distribution of the φ meson decay products 23 spin density matrix elements (SDMEs) for the φ meson were obtained. The number of SDMEs was defined by the experiment conditions, e.g. by the beam and target polarization directions. For the mentioned time period φ meson SDMEs were defined at HERMES for the first time. The quantities U{sub 1}, U{sub 2} and U{sub 3} which can be used to check presence of unnatural parity exchange (UPE) mechanism in phi meson production were calculated from SDMEs. All the results were obtained in 3 kinematic bins of Q{sup 2}, 4 kinematic bins of t' and for the integrated kinematics. No statistically significant difference between the results for hydrogen and deuteron targets was observed. The UPE quantities were found to be zero within 2 σ for the integrated kinematics, indicating negligible contribution of UPE for the φ meson production which is in agreement with theory predictions. The test of s-channel helicity conservation hypothesis via comparison of corresponding SDME values showed helicity conservation for the φ meson production.

Commissioning of the recoil silicon detector for the HERMES experiment

International Nuclear Information System (INIS)

Pickert, N.C.

2008-02-01

The reconstruction of the missing mass is limited by the position and momentum resolution of the HERMES spectrometer. In order to reach a higher accuracy in the measurements the backscattered nucleon must also be detected. A detector suited for this must give the possibility, to determine the momentum of the particles over a very large range: from minimally ionizing particles up to protons, which are stopped in the detector. The detector must also be able to discriminate hadrons and mesons as well as cover the complete spatial region around the target. In the winter 2005-2006 such a recoil detector was installed in the HERMES experiment. The detector sonsists of three partial detectors, a silicon counter within the scattering chamber, a sintillating-fiber detector and a photon detector. Before the installation of the detector the silicon modules were tested in a bench test and checked together with the other particle detectors in a test experiment. A large part of this dissertation is dedicated to the planning and performance of these tests as well to the evaluation of them. It could be show, that the modules worked accordly to their specifications, however because of unexpectedly high noise a signal correction became necessary. Different models for the correction were developed and tested in the framework of these thesis. In spite of the high noise cosmic muons could be detected and their energy deposition measured with a signal-to-noise ratio of 2:1. In the winter break 2005-2006 the recoil detector was installed into the HERMES experiment. First diagnosis and analysis software was developed. The silicon detector measured successfully energy depositions of minimally ionizing particles up to protons stopped in the sensor. Minimally ionizing particles could be detected with a signal-to-noise ratio of 5:1. By means of track information of the scintillating-fiber detector protons could be discriminated from pions and other mesons by the silicon detector. The HERMES

Commissioning of the recoil silicon detector for the HERMES experiment

Energy Technology Data Exchange (ETDEWEB)

Pickert, N C

2008-02-15

The reconstruction of the missing mass is limited by the position and momentum resolution of the HERMES spectrometer. In order to reach a higher accuracy in the measurements the backscattered nucleon must also be detected. A detector suited for this must give the possibility, to determine the momentum of the particles over a very large range: from minimally ionizing particles up to protons, which are stopped in the detector. The detector must also be able to discriminate hadrons and mesons as well as cover the complete spatial region around the target. In the winter 2005-2006 such a recoil detector was installed in the HERMES experiment. The detector sonsists of three partial detectors, a silicon counter within the scattering chamber, a sintillating-fiber detector and a photon detector. Before the installation of the detector the silicon modules were tested in a bench test and checked together with the other particle detectors in a test experiment. A large part of this dissertation is dedicated to the planning and performance of these tests as well to the evaluation of them. It could be show, that the modules worked accordly to their specifications, however because of unexpectedly high noise a signal correction became necessary. Different models for the correction were developed and tested in the framework of these thesis. In spite of the high noise cosmic muons could be detected and their energy deposition measured with a signal-to-noise ratio of 2:1. In the winter break 2005-2006 the recoil detector was installed into the HERMES experiment. First diagnosis and analysis software was developed. The silicon detector measured successfully energy depositions of minimally ionizing particles up to protons stopped in the sensor. Minimally ionizing particles could be detected with a signal-to-noise ratio of 5:1. By means of track information of the scintillating-fiber detector protons could be discriminated from pions and other mesons by the silicon detector. The HERMES

Deeply virtual Compton scattering off longitudinally polarised protons at HERMES

Energy Technology Data Exchange (ETDEWEB)

Mahon, David Francis

2010-06-15

This thesis details the simultaneous extraction of three polarisation-dependent asymmetries in the distribution of real photons from the ep{yields}ep{gamma} interaction and its indistinguishable deeply virtual Compton scattering and Bethe-Heitler processes at the HERMES fixed-target experiment at Desy. The data analysed were taken using a longitudinally polarised 27.57 GeV positron beam incident on a longitudinally polarised hydrogen gas target. The extracted asymmetries include two single-spin asymmetries A{sub UL} and A{sub LU} which depend on the polarisation of the target and beam respectively, averaged over all other polarisation states. The double-spin asymmetry A{sub LL} dependent on the product of the beam and target polarisations is extracted for the first time. The asymmetry amplitudes extracted relate to combinations of Generalised Parton Distributions (GPDs), predominantly H and H. The extracted amplitudes are presented across the HERMES kinematic range alongside theoretical predictions from a GPD model based on double distributions. Large sin {phi} and cos(0{phi}) amplitudes are observed for A{sub UL} and A{sub LL} respectively, with an unexpectedly large sin(2{phi}) amplitude for A{sub UL}. The results for the A{sub UL} and A{sub LL} asymmetries are broadly compatible with theory predictions, and the extracted A{sub LU} amplitudes are compatible with HERMES results extracted from a significantly larger data set. It is foreseen that these results will form input to future global data-based GPD models which aim to provide a better understanding of GPDs. (orig.)

First light results from the Hermes spectrograph at the AAT

NARCIS (Netherlands)

Sheinis, A.; Barden, S.; Birchall, M.; Carollo, D.; Bland-Hawthorn, J.; Brzeski, J.; Case, S.; Cannon, R.; Churilov, V.; Couch, W.; Dean, R.; De Silva, G.; D'Orazi, V.; Farrell, T.; Fiegert, K.; Freeman, K.; Frost, G.; Gers, L.; Goodwin, M.; Gray, D.; Heald, R.; Heijmans, J.A.C.; Jones, D.; Keller, S.; Klauser, U.; Kondrat, Y.; Lawrence, J.; Lee, S.; Mali, S.; Martell, S.; Mathews, D.; Mayfield, D.; Miziarski, S.; Muller, R.; Pai, N.; Patterson, R.; Penny, E.; Orr, D.; Shortridge, K.; Simpson, J.; Smedley, S.; Smith, G.; Stafford, D.; Staszak, N.; Vuong, M.; Waller, L.; Wylie de Boer, E.; Xavier, P.; Zheng, J.; Zhelem, R.; Zucker, D.

2014-01-01

The High Efficiency and Resolution Multi Element Spectrograph, HERMES is an facility-class optical spectrograph for the AAT. It is designed primarily for Galactic Archeology [21], the first major attempt to create a detailed understanding of galaxy formation and evolution by studying the history of

VizieR Online Data Catalog: HerMES Large Mode Survey catalogue (Asboth+, 2016)

Science.gov (United States)

Asboth, V.; Conley, A.; Sayers, J.; Bethermin, M.; Chapman, S. C.; Clements, D. L.; Cooray, A.; Dannerbauer, H.; Farrah, D.; Glenn, J.; Golwala, S. R.; Halpern, M.; Ibar, E.; Ivison, R. J.; Maloney, P. R.; Marques-Chaves, R.; Martinez-Navajas, P. I.; Oliver, S. J.; Perez-Fournon, I.; Riechers, D. A.; Rowan-Robinson, M.; Scott, D.; Siegel, S. R.; Vieira, J. D.; Viero, M.; Wang, L.; Wardlow, J.; Wheeler, J.

2018-01-01

The HerMES Large Mode Survey (HeLMS) consists of a large area shallow observation of an equatorial field at wavelengths of 250, 350 and 500um, obtained using the SPIRE aboard the Herschel Space Observatory. HeLMS is an extension of HerMES (Oliver et al., 2012MNRAS.424.1614O, Cat. VIII/95 and VIII/103), a 'wedding cake' type survey containing small and deep maps and larger shallower observations of different fields. HeLMS covers about 302deg2 of the sky, making it the largest area observed in the HerMES. The HeLMS field spans 23h14m

Design and performance of the large HERMES drift chambers

International Nuclear Information System (INIS)

Bernreuther, S.; Boettcher, H.; Ferstl, M.; Gute, A.; Harder, U.; Krause, B.; Meissner, F.; Nowak, W.D.; Schmidt, F.; Schwind, A.E.

1995-01-01

Big planar drift chambers built for the downstream tracking system of the HERMES spectrometer are described. Using the fast non-flammable gas mixture Ar/CO 2 /CF 4 (90/5/5) average spatial resolutions of about 180 μm per plane at efficiencies above 96% have been obtained from test run data analysis. (orig.)

Polarized semi-inclusive deep-inelastic scattering on transversely and longitudinally polarized nucleons at HERMES

International Nuclear Information System (INIS)

Hommes, B.

2005-01-01

The HERMES experiment has measured double spin asymmetries in the cross section for deep-inelastic scattering of longitudinal polarized positrons off longitudinal polarized hydrogen and deuterium targets. From these asymmetries, based on inclusive and semi-inclusive measurements, polarized quark distributions were extracted as a function of x. Single-spin azimuthal asymmetries in semi-inclusive pion production were measured by the HERMES experiment for the first time, with a transversely polarized hydrogen target. Two different sine-dependencies were extracted which can be related to the quark transversity distribution h q 1 (x) and the Sivers function (Author)

Correlation of Noise Signature to Pulsed Power Events at the HERMES III Accelerator.

Energy Technology Data Exchange (ETDEWEB)

Lewis, Barbara [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Joseph, Nathan Ryan [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Salazar, Juan Diego [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

2016-11-01

The HERMES III accelerator, which is located at Sandia National Laboratories' Tech Area IV, is the largest pulsed gamma X-ray source in the world. The accelerator is made up of 20 inductive cavities that are charged to 1 MV each by complex pulsed power circuitry. The firing time of the machine components ranges between the microsecond and nanosecond timescales. This results in a variety of electromagnetic frequencies when the accelerator fires. Testing was done to identify the HERMES electromagnetic noise signal and to map it to the various accelerator trigger events. This report will show the measurement methods used to capture the noise spectrum produced from the machine and correlate this noise signature with machine events.

Exclusive ρ0 production measured with the HERMES recoil detector

International Nuclear Information System (INIS)

Perez Benito, Roberto Francisco

2010-12-01

The Hermes experiment (HERa MEasurement of Spin) at Desy was designed to study the spin structure of the nucleon in semi-inclusive deep inelastic scattering. The internal structure of the nucleon has been investigated in detail and it has been measured that the intrinsic quark spin contribution is only about 30% of the total spin of the nucleon. A formalism to describe the internal structure of the nucleon called Generalised Patron Distributions (GPDs) was developed recently to understand the fundamental structure of the nucleon. These GPDs can be accessed by the measurement of hard exclusive reactions and hard exclusive processes that can be understood in terms of GPDs. The accumulated Hermes data offer access to GPDs in different combinations of beam charge and beam and target helicity asymmetries. To improve exclusivity and to enhance the resolution of kinematic variables to study hard exclusive processes which provide access to the GPDs and hence to the orbital angular momentum of the quarks, in January 2006 a Recoil Detector was installed that surrounded the internal gas target of the Hermes experiment. The Hermes Recoil Detector consisted of three components: a silicon strip detector inside the vacuum, a scintillating fiber tracker and the photon detector. All three detectors were located inside a solenoidal magnet which provided a 1T longitudinal magnetic field. The Recoil Detector improves the selection of exclusive events by a direct measurement of the momentum and track position of the recoiling particle as well as by rejecting non-exclusive background. This detector was an ideal novel tool to combine energy and position measurements for charged particles in a momentum range of 0.1 to 1.4 GeV/c. The Recoil Detector was fully commissioned and operating. Data was taken continuously until the final Hera shutdown in July of 2007. In this thesis we report on the performance of the Recoil Detector and more specifically about the scintillating fiber tracker

Star Formation in M 33 (HerM33es)

Science.gov (United States)

Kramer, C.; Boquien, M.; Braine, J.; Buchbender, C.; Calzetti, D.; Gratier, P.; Mookerjea, B.; Relaño, M.; Verley, S.

2011-11-01

Within the key project "Herschel M 33 extended survey" (HerM33es), we are studying the physical and chemical processes driving star formation and galactic evolution in the nearby galaxy M 33, combining the study of local conditions affecting individual star formation with properties only becoming apparent on global scales. Here, we present recent results obtained by the HerM33es team. Combining Spitzer and Herschel data ranging from 3.6 μm to 500μm, along with H i, Hα, and GALEX UV data, we have studied the dust at high spatial resolutions of 150 pc, providing estimators of the total infrared (TIR) brightness and of the star formation rate. While the temperature of the warm dust at high brightness is driven by young massive stars, evolved stellar populations appear to drive the temperature of the cold dust. Plane-parallel models of photon dominated regions (PDRs) fail to reproduce fully the [C ii], [O i], and CO maps obtained in a first spectroscopic study of one 2' × 2' subregion of M 33, located on the inner, northern spiral arm and encompassing the H ii region BCLMP 302.

Latest HERMES results on transverse spin effects in hadron structure and formation

International Nuclear Information System (INIS)

Pappalardo, L.L.

2008-01-01

Transverse target single-spin asymmetries in semi-inclusive deep inelastic scattering allow to study the so-called Collins and Sivers mechanisms. The first one connects the poorly known fundamental transversity distribution function, describing the transverse spin-polarization of quarks in a transversely polarized proton, to the Collins fragmentation function, describing spin-orbit correlations in the hadron formation process. The second one is sensitive to the Sivers function, which correlates the intrinsic transverse momentum of quarks with the proton's spin orientation and is related to the orbital angular momentum of quarks. Preliminary results on azimuthal single target-spin asymmetries in semi-inclusive electro-production of pions and kaons at the HERMES experiment are presented. The full data set collected with a transversely polarized hydrogen target was analyzed providing the HERMES most precise results on the Collins and Sivers azimuthal moments. (orig.)

Structural basis of hAT transposon end recognition by Hermes, an octameric DNA transposase from Musca domestica.

Science.gov (United States)

Hickman, Alison B; Ewis, Hosam E; Li, Xianghong; Knapp, Joshua A; Laver, Thomas; Doss, Anna-Louise; Tolun, Gökhan; Steven, Alasdair C; Grishaev, Alexander; Bax, Ad; Atkinson, Peter W; Craig, Nancy L; Dyda, Fred

2014-07-17

Hermes is a member of the hAT transposon superfamily that has active representatives, including McClintock's archetypal Ac mobile genetic element, in many eukaryotic species. The crystal structure of the Hermes transposase-DNA complex reveals that Hermes forms an octameric ring organized as a tetramer of dimers. Although isolated dimers are active in vitro for all the chemical steps of transposition, only octamers are active in vivo. The octamer can provide not only multiple specific DNA-binding domains to recognize repeated subterminal sequences within the transposon ends, which are important for activity, but also multiple nonspecific DNA binding surfaces for target capture. The unusual assembly explains the basis of bipartite DNA recognition at hAT transposon ends, provides a rationale for transposon end asymmetry, and suggests how the avidity provided by multiple sites of interaction could allow a transposase to locate its transposon ends amidst a sea of chromosomal DNA. Copyright © 2014 Elsevier Inc. All rights reserved.

Simultaneous measurement of Aspartate, NAA, and NAAG using HERMES spectral editing at 3 Tesla.

Science.gov (United States)

Chan, Kimberly L; Saleh, Muhammad G; Oeltzschner, Georg; Barker, Peter B; Edden, Richard A E

2017-07-15

It has previously been shown that the HERMES method ('Hadamard Encoding and Reconstruction of MEGA-Edited Spectroscopy') can be used to simultaneously edit pairs of metabolites (such as N-acetyl-aspartate (NAA) and N-acetyl aspartyl glutamate (NAAG), or glutathione and GABA). In this study, HERMES is extended for the simultaneous editing of three overlapping signals, and illustrated for the example of NAA, NAAG and Aspartate (Asp). Density-matrix simulations were performed in order to optimize the HERMES sequence. The method was tested in NAA and Asp phantoms, and applied to the centrum semiovale of the nine healthy control subjects that were scanned at 3T. Both simulations and phantom experiments showed similar metabolite multiplet patterns with good segregation of all three metabolites. In vivo measurements show consistent relative signal intensities and multiplet patterns with concentrations in agreement with literature values. Simulations indicate co-editing of glutathione, glutamine, and glutamate, but their signals do not significantly overlap with the detected aspartyl resonances. This study demonstrates that a four-step Hadamard-encoded editing scheme can be used to simultaneously edit three otherwise overlapping metabolites, and can measure NAA, NAAG, and Asp in vivo in the brain at 3T with minimal crosstalk. Copyright © 2017 Elsevier Inc. All rights reserved.

Exclusive ρ0 production at HERMES

International Nuclear Information System (INIS)

Rostomyan, Armine Armand

2008-11-01

In this thesis the exclusive electroproduction of ρ 0 mesons is analyzed using the data accumulated with the HERMES spectrometer in the years 2002-2005 by scattering the lepton beam of the HERA accelerator of the internal target of HERMES filled with transversely polarized hydrogen gas atoms. The ρ 0 production mechanism and, in a model-dependent way, the structure of the nucleon are studied by measuring the spin-density matrix elements (SDMEs), which parameterize the ρ 0 production and decay angular distribution. The decomposition of the angular distribution in terms of SDMEs was previously done for both polarized and unpolarized lepton beam and unpolarized target. Recently, the angular distribution was decomposed in terms of SDMEs also for a transversely polarized target. A first measurement of the 30 'transverse' SDMEs is reported in this thesis, yielding information on the degree of s-channel helicity conservation and natural-parity exchange in the case of a transversely polarized target. The measured SDMEs are implemented into the rhoMC Monte Carlo generator, which is currently the only one capable of fully simulating the exclusive ρ 0 production and decay for both unpolarized and polarized beam and target. The interest in SDMEs for a polarized target arose after it was shown that at leading twist the corresponding SDMEs can be related to the azimuthal transverse target-spin asymmetry in the cross section of exclusive ρ 0 production which is sensitive to the unknown nucleon helicity-ip GPDs. Since the GPD formalism is only valid for longitudinally polarized vector mesons produced by longitudinal photons, for the first time the transverse target-spin asymmetry of longitudinally polarized ρ 0 mesons is extracted and compared to the available theoretical predictions, specically considering possible problems with next-to-leading order corrections. (orig.)

Exclusive {rho}{sup 0} production measured with the HERMES recoil detector

Energy Technology Data Exchange (ETDEWEB)

Perez Benito, Roberto Francisco

2010-12-15

The Hermes experiment (HERa MEasurement of Spin) at Desy was designed to study the spin structure of the nucleon in semi-inclusive deep inelastic scattering. The internal structure of the nucleon has been investigated in detail and it has been measured that the intrinsic quark spin contribution is only about 30% of the total spin of the nucleon. A formalism to describe the internal structure of the nucleon called Generalised Patron Distributions (GPDs) was developed recently to understand the fundamental structure of the nucleon. These GPDs can be accessed by the measurement of hard exclusive reactions and hard exclusive processes that can be understood in terms of GPDs. The accumulated Hermes data offer access to GPDs in different combinations of beam charge and beam and target helicity asymmetries. To improve exclusivity and to enhance the resolution of kinematic variables to study hard exclusive processes which provide access to the GPDs and hence to the orbital angular momentum of the quarks, in January 2006 a Recoil Detector was installed that surrounded the internal gas target of the Hermes experiment. The Hermes Recoil Detector consisted of three components: a silicon strip detector inside the vacuum, a scintillating fiber tracker and the photon detector. All three detectors were located inside a solenoidal magnet which provided a 1T longitudinal magnetic field. The Recoil Detector improves the selection of exclusive events by a direct measurement of the momentum and track position of the recoiling particle as well as by rejecting non-exclusive background. This detector was an ideal novel tool to combine energy and position measurements for charged particles in a momentum range of 0.1 to 1.4 GeV/c. The Recoil Detector was fully commissioned and operating. Data was taken continuously until the final Hera shutdown in July of 2007. In this thesis we report on the performance of the Recoil Detector and more specifically about the scintillating fiber tracker

Detection of low momentum protons with the new HERMES recoil detector

Energy Technology Data Exchange (ETDEWEB)

Vilardi, Ignazio

2008-10-15

In this theis the recoil detector for the HERMES experiment at HERA is described. It consists of a silicon strip detector, a scintillating fiber tracker, and a photon detector for the {delta}{sup +} background rejection, all surrounded by a superconducting 1 Tesla solenoid. Results of cosmic ray tests are presented. (HSI)

Detection of low momentum protons with the new HERMES recoil detector

International Nuclear Information System (INIS)

Vilardi, Ignazio

2008-10-01

In this theis the recoil detector for the HERMES experiment at HERA is described. It consists of a silicon strip detector, a scintillating fiber tracker, and a photon detector for the Δ + background rejection, all surrounded by a superconducting 1 Tesla solenoid. Results of cosmic ray tests are presented. (HSI)

Deeply virtual Compton scattering off an unpolarised hydrogen target at HERMES

Energy Technology Data Exchange (ETDEWEB)

Burns, Jonathan R.T.

2010-08-15

Deeply Virtual Compton Scattering (DVCS) i.e. ep {yields} ep{gamma} is the simplest interaction that allows access to Generalised Parton Distributions (GPDs), a theoretical framework describing nucleon structure. The strong interest in GPDs results from the fact that they can be used to determine the total angular momentum of quarks inside the nucleon and provide a 3-dimensional picture of nucleon structure. The measurement of the DVCS process is facilitated by the interference with a competing interaction known as the Bethe-Heitler process which has the same nal state. DVCS information is obtained from the asymmetrical in distribution of the real photon around the azimuthal angle {phi} at HERMES. Beam charge and beam helicity asymmetries, extracted from DVCS events with an unpolarised hydrogen target recorded during the 2006-2007 and 1996-2007 data taking periods, are presented in this thesis. The asymmetry amplitudes are presented over the range of HERMES kinematic acceptance, with their dependence on kinematic variables t, x{sub B} and Q{sup 2} also shown and compared to a phenomenological model. (orig.)

The deterministic optical alignment of the HERMES spectrograph

Science.gov (United States)

Gers, Luke; Staszak, Nicholas

2014-07-01

The High Efficiency and Resolution Multi Element Spectrograph (HERMES) is a four channel, VPH-grating spectrograph fed by two 400 fiber slit assemblies whose construction and commissioning has now been completed at the Anglo Australian Telescope (AAT). The size, weight, complexity, and scheduling constraints of the system necessitated that a fully integrated, deterministic, opto-mechanical alignment system be designed into the spectrograph before it was manufactured. This paper presents the principles about which the system was assembled and aligned, including the equipment and the metrology methods employed to complete the spectrograph integration.

Hadron Mass Effects: Kaons at HERMES vs. COMPASS

Energy Technology Data Exchange (ETDEWEB)

Guerrero Teran, Juan V. [Hampton Univ., Hampton, VA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Accardi, Alberto [Hampton Univ., Hampton, VA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

2018-02-01

Experimental data for integrated kaon multiplicities taken at HERMES and COMPASS measurements look incompatible with each other. In this talk, we investigate the effects of hadron masses calculated at leading-order and leading twist at the kinematics of these two experiments. We present evidence that Hadron Mass Corrections can fully reconcile the data for the K+/K- multiplicity ratio, and can also sizeably reduce the apparent large discrepancy in the case of K++K- data. Residual differences in the shape of the latter one remains to be understood.

CRED REA Algal Assessments at Pearl and Hermes Atoll, NW Hawaiian Islands in 2006

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — Twelve quadrats were sampled along 2 consecutively-placed, 25m transect lines, as part of Rapid Ecological Assessments, conducted at 13 sites at Pearl and Hermes...

The luminosity monitor of the HERMES experiment at DESY

CERN Document Server

Benisch, T; Devitsin, E G; Kozlov, V; Potashov, S Yu; Rith, K; Terkulov, A R; Weiskopf, C

2001-01-01

A detector is described which measures the luminosity of the HERMES experiment at DESY. It is based on the coincident detection of electron-positron and photon pairs, or electron pairs, originating from the interaction of the beam positrons, or electrons, with the electrons of the atomic gas target. It consists of two calorimeters with radiation hard NaBi(WO sub 4) sub 2 crystals. Properties of the monitor, investigated in an electron test beam, and its performance in the experiment are presented.

Exclusive {rho}{sup 0} production at HERMES

Energy Technology Data Exchange (ETDEWEB)

Rostomyan, Armine Armand

2008-11-15

In this thesis the exclusive electroproduction of {rho}{sup 0} mesons is analyzed using the data accumulated with the HERMES spectrometer in the years 2002-2005 by scattering the lepton beam of the HERA accelerator of the internal target of HERMES filled with transversely polarized hydrogen gas atoms. The {rho}{sup 0} production mechanism and, in a model-dependent way, the structure of the nucleon are studied by measuring the spin-density matrix elements (SDMEs), which parameterize the {rho}{sup 0} production and decay angular distribution. The decomposition of the angular distribution in terms of SDMEs was previously done for both polarized and unpolarized lepton beam and unpolarized target. Recently, the angular distribution was decomposed in terms of SDMEs also for a transversely polarized target. A first measurement of the 30 'transverse' SDMEs is reported in this thesis, yielding information on the degree of s-channel helicity conservation and natural-parity exchange in the case of a transversely polarized target. The measured SDMEs are implemented into the rhoMC Monte Carlo generator, which is currently the only one capable of fully simulating the exclusive {rho}{sup 0} production and decay for both unpolarized and polarized beam and target. The interest in SDMEs for a polarized target arose after it was shown that at leading twist the corresponding SDMEs can be related to the azimuthal transverse target-spin asymmetry in the cross section of exclusive {rho}{sup 0} production which is sensitive to the unknown nucleon helicity-ip GPDs. Since the GPD formalism is only valid for longitudinally polarized vector mesons produced by longitudinal photons, for the first time the transverse target-spin asymmetry of longitudinally polarized {rho}{sup 0} mesons is extracted and compared to the available theoretical predictions, specically considering possible problems with next-to-leading order corrections. (orig.)

Exclusive {rho}{sup 0} production at HERMES

Energy Technology Data Exchange (ETDEWEB)

Rostomyan, Armine Armand

2008-11-15

In this thesis the exclusive electroproduction of {rho}{sup 0} mesons is analyzed using the data accumulated with the HERMES spectrometer in the years 2002-2005 by scattering the lepton beam of the HERA accelerator of the internal target of HERMES filled with transversely polarized hydrogen gas atoms. The {rho}{sup 0} production mechanism and, in a model-dependent way, the structure of the nucleon are studied by measuring the spin-density matrix elements (SDMEs), which parameterize the {rho}{sup 0} production and decay angular distribution. The decomposition of the angular distribution in terms of SDMEs was previously done for both polarized and unpolarized lepton beam and unpolarized target. Recently, the angular distribution was decomposed in terms of SDMEs also for a transversely polarized target. A first measurement of the 30 'transverse' SDMEs is reported in this thesis, yielding information on the degree of s-channel helicity conservation and natural-parity exchange in the case of a transversely polarized target. The measured SDMEs are implemented into the rhoMC Monte Carlo generator, which is currently the only one capable of fully simulating the exclusive {rho}{sup 0} production and decay for both unpolarized and polarized beam and target. The interest in SDMEs for a polarized target arose after it was shown that at leading twist the corresponding SDMEs can be related to the azimuthal transverse target-spin asymmetry in the cross section of exclusive {rho}{sup 0} production which is sensitive to the unknown nucleon helicity-ip GPDs. Since the GPD formalism is only valid for longitudinally polarized vector mesons produced by longitudinal photons, for the first time the transverse target-spin asymmetry of longitudinally polarized {rho}{sup 0} mesons is extracted and compared to the available theoretical predictions, specically considering possible problems with next-to-leading order corrections. (orig.)

CRED REA Algal Assessments, Pearl and Hermes Atoll, Northwestern Hawaiian Islands, 2002 (NODC Accession 0010352)

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — Twelve quadrats were sampled along 2 consecutively-placed, 25m transect lines as part of Rapid Ecological Assessments conducted at 14 sites at Pearl and Hermes Atoll...

CRED REA Algal Assessments, Pearl and Hermes Atoll, Northwestern Hawaiian Islands 2003 (NODC Accession 0010352)

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — Twelve quadrats were sampled along 2 consecutively-placed, 25m transect lines as part of Rapid Ecological Assessments conducted at 15 sites at Pearl and Hermes Atoll...

CRED REA Coral Population Parameters at Pearl and Hermes Atoll, NW Hawaiian Islands (NWHI), 2006

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — Belt transects along 2 consecutively-placed, 25m transect lines were surveyed as part of Rapid Ecological Assessments conducted at 13 sites at Pearl and Hermes Atoll...

Decommissioning of the Hermes facility at AERE Harwell

International Nuclear Information System (INIS)

Brant, A.W.

1988-01-01

The contract for decommissioning the HERMES (Heavy Element and Radioactive Materials Electromagnetic Separator) Facility at AERE Harwell was the first contract of its type awarded to Private Industry by the Public Sector. The work required operatives to work in pressure suits for extended periods in decommissioning a heavily alpha contaminated facility. The work required the setting up of a temporary changeroom, waste posting facilities, air suit supplies and controls and temporary ventilation for a completely self-contained site set-up. The Contractor had to provide and train his own operatives, provide all health physics supervision and control and take full responsibility for all technical matters. (author)

The Boer-Mulders and Cahn effects. Azimuthal modulations in the spin-independent SIDIS cross section at HERMES

International Nuclear Information System (INIS)

Lamb, Rebecca Mae

2010-08-01

The cos φ h and cos 2φ h modulations of the spin independent semi-inclusive deep inelastic scattering cross section were measured at Hermes. These modulations are sensitive to the polarization and transverse motion of quarks within the nucleon. The Cahn effect, which contributes at subleading twist (twist-3) to cos φ h and twist-4 to cos 2φ h , is sensitive to transverse motion of quarks. The Boer-Mulders effect, which contributes at subleading twist to cos φ h and leading twist to cos 2φ h , requires non-zero transverse quark motion and is sensitive to quark polarization, effectively measuring the quark spin-orbit correlation. These modulations were measured in a fully differential way, as a function of x, y, z, and P h perpendicular to for positive and negative pions, kaons, and unidentified-hadrons produced from hydrogen and deuterium targets at Hermes. This is the the most complete measurement to date, for the first time granting access to the flavor dependent distribution and fragmentation functions that generate these moments. These measurement would not have been possible without an improved hadron-type identification algorithm for the Ring Imaging Cherenkov (RICH) detector. The EVT event-level algorithm is presented and now is the primary method used at Hermes. (orig.)

Analysis of hard exclusive scattering processes of the HERMES recoil experiment

International Nuclear Information System (INIS)

Brodski, Irina

2014-11-01

Deeply virtual Compton Scattering (DVCS), ep → epγ is the simplest reaction giving indication of generalized parton distributions (GPD) of the nucleon. The DVCS process has the same final state as the Bethe-Heitler process (BH). For this reason the access is taken not through the cross-sections directly but through asymmetries between DVCS events depending on charge and polarization of the 27.6 GeV beam. For the first time the azimuthal asymmetry amplitudes according the charge of the lepton beam are extracted using a kinematically complete reconstruction method at the HERMES experiment. The recoil detector installed in 2006 allows the reconstruction of recoiling protons that completes the measurements of the forward detector to cover almost the complete angle range around the vertex. This approach allows suppressing the background processes by almost a complete magnitude compared to the traditional method using only the information of the forward spectrometer. The analysis of the asymmetries was carried out at different values of the kinematic variables t c' x B and Q 2 to investigate the dependence of these variables. This work pushes the limits of the readability of data and shows which periods have been found to be unstable in the data acquisition. It points out the impact of this finding to previous HERMES publications.

The Boer-Mulders and Cahn effects. Azimuthal modulations in the spin-independent SIDIS cross section at HERMES

Energy Technology Data Exchange (ETDEWEB)

Lamb, Rebecca Mae

2010-08-15

The cos {phi}{sub h} and cos 2{phi}{sub h} modulations of the spin independent semi-inclusive deep inelastic scattering cross section were measured at Hermes. These modulations are sensitive to the polarization and transverse motion of quarks within the nucleon. The Cahn effect, which contributes at subleading twist (twist-3) to cos {phi}{sub h} and twist-4 to cos 2{phi}{sub h}, is sensitive to transverse motion of quarks. The Boer-Mulders effect, which contributes at subleading twist to cos {phi}{sub h} and leading twist to cos 2{phi}{sub h}, requires non-zero transverse quark motion and is sensitive to quark polarization, effectively measuring the quark spin-orbit correlation. These modulations were measured in a fully differential way, as a function of x, y, z, and P{sub h} {sub perpendicular} {sub to} for positive and negative pions, kaons, and unidentified-hadrons produced from hydrogen and deuterium targets at Hermes. This is the the most complete measurement to date, for the first time granting access to the flavor dependent distribution and fragmentation functions that generate these moments. These measurement would not have been possible without an improved hadron-type identification algorithm for the Ring Imaging Cherenkov (RICH) detector. The EVT event-level algorithm is presented and now is the primary method used at Hermes. (orig.)

Nonpartonic Effects in Pion Electroproduction in the Hermes Kinematical Region

International Nuclear Information System (INIS)

Uleshchenko, V.; Szczurek, A.

2002-01-01

The presentation is concerned with higher twist corrections of nonpartonic origin to semi-inclusive observables in the kinematical region relevant for the HERMES experiment. We demonstrate a strong impact of the VDM-like interaction and the exclusive production of ρ 0 meson on the extraction of the (anti)d - (anti)u asymmetry from charged pion DIS multiplicities. We also show that it is the exclusive- ρ 0 channel which accounts for the experimentally observed effect of the excess of charged over neutral pions produced at large z. (author)

76 FR 20918 - Endangered and Threatened Wildlife and Plants; 12-Month Finding on a Petition To List Hermes...

Science.gov (United States)

2011-04-14

... within this range [Hermes copper butterfly] distribution is limited to pockets where the larval food.... 51 Dictionary Hill.... 1962 Extirpated Isolation (Development). 52 Otay Mountain 1979 Extirpated 2003...

ATLOG Modeling of Aerial Cable from the November 2016 HERMES Electromagnetic Pulse Experiments

Energy Technology Data Exchange (ETDEWEB)

campione, salvatore [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Warne, Larry K. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Yee, Benjamin Tong [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Cartwright, Keith [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Basilio, Lorena I. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

2017-09-01

This report details the comparison of ATLOG modeling results for the response of a finite-length dissipative aerial conductor interacting with a conducting ground to a measurement taken November 2016 at the High-Energy Radiation Megavolt Electron Source (HERMES) facility. We use the ATLOG time-domain method based on transmission line theory. Good agreement is observed between simulations and experiments. Intentionally Left Blank

DAD - Distributed Adamo Database system at Hermes

International Nuclear Information System (INIS)

Wander, W.; Dueren, M.; Ferstl, M.; Green, P.; Potterveld, D.; Welch, P.

1996-01-01

Software development for the HERMES experiment faces the challenges of many other experiments in modern High Energy Physics: Complex data structures and relationships have to be processed at high I/O rate. Experimental control and data analysis are done on a distributed environment of CPUs with various operating systems and requires access to different time dependent databases like calibration and geometry. Slow and experimental control have a need for flexible inter-process-communication. Program development is done in different programming languages where interfaces to the libraries should not restrict the capacities of the language. The needs of handling complex data structures are fulfilled by the ADAMO entity relationship model. Mixed language programming can be provided using the CFORTRAN package. DAD, the Distributed ADAMO Database library, was developed to provide the I/O and database functionality requirements. (author)

The HERMES recoil photon detector and the study of deeply virtual Compton scattering

Energy Technology Data Exchange (ETDEWEB)

Hulse, Charlotte van

2011-03-15

The study of deeply virtual Compton scattering (DVCS) gives information about the contribution of the quark orbital angular momentum to the spin of the proton. DVCS has been studied at the HERMES experiment at DESY in Hamburg. Here 27.6 GeV longitudinally polarized electrons and positrons were scattered off a gaseous proton target. For the analysis of DVCS the recoiling proton could not be detected, but was reconstructed via its missing mass. This method suffers, however, from a 14% background contribution, mainly originating from associated DVCS. In this process the proton does not stay in its ground state but is excited to a {delta}{sup +} resonance. In order to reduce the background contribution down to less than 1%, a recoil detector was installed in the HERMES experiment beginning of 2006. This detector consists of three subcomponents, of which one is the photon detector. The main function of the photon detector is the detection of {delta}{sup +} decay photons. The photon detector was started up and commissioned for the analysis of (associated) DVCS. Subsequently DVCS and associated DVCS were analyzed using the recoil detector. (orig.)

The HERMES recoil detector. Particle identification and determination of detector efficiency of the scintillating fiber tracker

Energy Technology Data Exchange (ETDEWEB)

Lu, Xianguo

2009-11-15

HERMES is a fixed target experiment using the HERA 27.6 GeV polarized electron/positron beams. With the polarized beams and its gas targets, which can be highly polarized, HERMES is dedicated to study the nucleon spin structure. One of its current physics programs is to measure deeply virtual Compton scattering (DVCS). In order to detect the recoiling proton the Recoil Detector was installed in the target region in the winter of 2005, taking data until the HERA-shutdown in the summer of 2007. The Recoil Detector measured energy loss of the traversing particles with its sub-detectors, including the silicon strip detector and the scintillating fiber tracker. This enables particle identification for protons and pions. In this work a systematic particle identification procedure is developed, whose performance is quantified. Another aspect of this work is the determination of the detector efficiency of the scintillating fiber tracker. (orig.)

The TESS-HERMES survey data release 1: high-resolution spectroscopy of the TESS southern continuous viewing zone

Science.gov (United States)

Sharma, Sanjib; Stello, Dennis; Buder, Sven; Kos, Janez; Bland-Hawthorn, Joss; Asplund, Martin; Duong, Ly; Lin, Jane; Lind, Karin; Ness, Melissa; Huber, Daniel; Zwitter, Tomaz; Traven, Gregor; Hon, Marc; Kafle, Prajwal R.; Khanna, Shourya; Saddon, Hafiz; Anguiano, Borja; Casey, Andrew R.; Freeman, Ken; Martell, Sarah; De Silva, Gayandhi M.; Simpson, Jeffrey D.; Wittenmyer, Rob A.; Zucker, Daniel B.

2018-01-01

The Transiting Exoplanet Survey Satellite (TESS) will provide high-precision time series photometry for millions of stars with at least a half-hour cadence. Of particular interest are the circular regions of 12° radius centred around the ecliptic poles that will be observed continuously for a full year. Spectroscopic stellar parameters are desirable to characterize and select suitable targets for TESS, whether they are focused on exploring exoplanets, stellar astrophysics or Galactic archaeology. Here, we present spectroscopic stellar parameters (Teff, log g, [Fe/H], v sin i, vmicro) for about 16 000 dwarf and subgiant stars in TESS' southern continuous viewing zone. For almost all the stars, we also present Bayesian estimates of stellar properties including distance, extinction, mass, radius and age using theoretical isochrones. Stellar surface gravity and radius are made available for an additional set of roughly 8500 red giants. All our target stars are in the range 10 using the High Efficiency and Resolution Multi-Element Spectrograph (HERMES; R ∼ 28 000) at the Anglo-Australian Telescope as part of the TESS-HERMES survey. Comparing our results with the TESS Input Catalogue (TIC) shows that the TIC is generally efficient in separating dwarfs and giants, but it has flagged more than 100 cool dwarfs (Teff < 4800 K) as giants, which ought to be high-priority targets for the exoplanet search. The catalogue can be accessed via http://www.physics.usyd.edu.au/tess-hermes/, or at Mikulski Archive for Space Telescopes (MAST).

Θ"+ search at HERMES with deuterium and hydrogen targets

International Nuclear Information System (INIS)

Wang Siguang; Schnell, Gunar

2016-01-01

The previous search at HERMES for narrow baryon states excited in quasi-real photo-production, decaying through the channel Θ"+ → pK_S"0 → pπ"+ π"-, has been extended. Improved decay-particle reconstruction, more advanced particle identification, and increased event samples are employed. The structure that was observed earlier at an invariant mass of 1528 MeV shifts to 1522 MeV in the new analysis of data with a deuterium target, with a drop of statistical significance to about 2σ. The number of events above background is 68_-_3_1"+"9"8(stat)±13(sys). No such structure is observed in the hydrogen data set. (author)

Use of radial self-field geometry for intense pulsed ion beam generation above 6 MeV on Hermes III.

Energy Technology Data Exchange (ETDEWEB)

Renk, Timothy Jerome [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Harper-Slaboszewicz, Victor Jozef [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Ginn, William Craig [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Mikkelson, Kenneth A. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Schall, Michael [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Cooper, Gary Wayne [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

2012-12-01

We investigate the generation and propagation of intense pulsed ion beams at the 6 MeV level and above using the Hermes III facility at Sandia National Laboratories. While high-power ion beams have previously been produced using Hermes III, we have conducted systematic studies of several ion diode geometries for the purpose of maximizing focused ion energy for a number of applications. A self-field axial-gap diode of the pinch reflex type and operated in positive polarity yielded beam power below predicted levels. This is ascribed both to power flow losses of unknown origin upstream of the diode load in Hermes positive polarity operation, and to anomalies in beam focusing in this configuration. A change to a radial self-field geometry and negative polarity operation resulted in greatly increased beam voltage (> 6 MeV) and estimated ion current. A comprehensive diagnostic set was developed to characterize beam performance, including both time-dependent and time-integrated measurements of local and total beam power. A substantial high-energy ion population was identified propagating in reverse direction, i.e. from the back side of the anode in the electron beam dump. While significant progress was made in increasing beam power, further improvements in assessing the beam focusing envelope will be required before ultimate ion generation efficiency with this geometry can be completely determined.

CRED 20m Gridded bathymetry and IKONOS estimated depths of Pearl and Hermes Atoll, Hawaii, USA (Arc ASCII format)

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — Gridded bathymetry and IKONOS estimated depths of the shelf and slope environments of Pearl and Hermes Atoll, Hawaii, USA. Bottom coverage was achieved in depths...

CRED 5 m Gridded bathymetry and IKONOS estimated depths of Pearl and Hermes Atoll, Hawaii, USA (Arc ASCII format)

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — Gridded bathymetry and IKONOS estimated depths of the shelf and slope environments of Pearl and Hermes Atoll, Hawaii, USA. Bottom coverage was achieved in depths...

CRED 20 m Gridded bathymetry and IKONOS estimated depths of Pearl and Hermes Atoll, Hawaii, USA (NetCDF format)

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — Gridded bathymetry and IKONOS estimated depths of the shelf and slope environments of Pearl and Hermes Atoll, Hawaii, USA. Bottom coverage was achieved in depths...

CRED 5 m Gridded bathymetry and IKONOS estimated depths of Pearl and Hermes Atoll, Hawaii, USA (NetCDF format)

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — Gridded bathymetry and IKONOS estimated depths of the shelf and slope environments of Pearl and Hermes Atoll, Hawaii, USA. Bottom coverage was achieved in depths...

Detailed Post Analysis of HERMES-HALF Experiment using RELAP5/MOD3

Energy Technology Data Exchange (ETDEWEB)

Park, Rae Joon; Kang, Kyung Ho; Ha, Kwang Soon; Cho, Young Ro; Koo, Kil Mo; Kim, Sang Baik; Kim, Hee Dong

2005-03-15

As part of a study on a two-phase natural circulation flow between the outer reactor vessel and the insulation material in the reactor cavity under an external reactor vessel cooling of APR1400, a HERMES-HALF experiment has been analyzed to verify and evaluate the experimental results using the RELAP5/MOD3 computer code. The RELAP5/MOD3 results have shown that the water circulation mass flow rate is very similar to the experimental results of the HERMES-HALF, in general. Increases in the water inlet area and the water level in the reactor cavity lead to an increase in the water circulation mass flow rate. In the small water inlet area condition, the lower value of the water outlet area has an effect on the water circulation mass flow rate, but the larger value of this has no effect. The air injection mass flow rate has no effect on the water circulation mass flow rate when it is greater than 40 % at the small water inlet area condition. However, an increase in the air injection mass flow rate leads to an increase in the water circulation mass flow rate. In the large water inlet area condition, increases in the water outlet area and the air injection mass flow rate lead to an increase in the water circulation mass flow rate. As the water outlet moves to a lower position, the water circulation mass flow rate slowly increases.

Beam-helicity azimuthal asymmetry measured with the recoil detector in exclusive electroproduction of real photons at HERMES

Energy Technology Data Exchange (ETDEWEB)

Yu Weilin

2009-11-15

The experiments at the HERA storage ring at DESY yielded a large contribution to the understanding of the nucleon structure. They used for this the deep inelastic scattering (DIS) in the collision of electrons/positrons and protons. The HERMES experiment at DESY applied the longitudinally polarized electron or positron beam with an energy of 27.6 GeV together with a polarized or unpolarized gas target in order to study the spin structure of the nucleon. By the measurement of deeply virtual Compton scattering (DVCS) the generalized parton distributions (GPDs) can be determined. These allow a unified description of the nucleon structure. Furthermore they give an experimental approach to the orbital angular momenta of the quarks. However the DVCS process is not discriminable from the Bethe-Heitler (BH) process, in which the scattered electron produces by bremsstrahlung processes a real photon. But it was proved that the interference caused by this indiscriminability of BH and DVCS presents the approach to the DVCS amplitude. This pursues by the measurement of asymmetries of the BH-DVCS cross section in relation to the beam charge, the beam polarization, or the target polarization. The HERMES spectrometer was constructed in order to measure semi-inclusive and inclusive DIS processes. The extraction of the azimutal asymmetries in relation to the beam helicity from the data of 2007 at the hydrogen target were performed in this thesis. The extracted asymmetry amplitudes from the elastic BH/DVCS process agree well with the earlier measurements of HERMES. Furthermore for the first time the asymmetry of {delta}{sup +} resonances was extracted, however the events are because of the low statistics affect with large uncertainties.

Beam-helicity azimuthal asymmetry measured with the recoil detector in exclusive electroproduction of real photons at HERMES

International Nuclear Information System (INIS)

Yu Weilin

2009-11-01

The experiments at the HERA storage ring at DESY yielded a large contribution to the understanding of the nucleon structure. They used for this the deep inelastic scattering (DIS) in the collision of electrons/positrons and protons. The HERMES experiment at DESY applied the longitudinally polarized electron or positron beam with an energy of 27.6 GeV together with a polarized or unpolarized gas target in order to study the spin structure of the nucleon. By the measurement of deeply virtual Compton scattering (DVCS) the generalized parton distributions (GPDs) can be determined. These allow a unified description of the nucleon structure. Furthermore they give an experimental approach to the orbital angular momenta of the quarks. However the DVCS process is not discriminable from the Bethe-Heitler (BH) process, in which the scattered electron produces by bremsstrahlung processes a real photon. But it was proved that the interference caused by this indiscriminability of BH and DVCS presents the approach to the DVCS amplitude. This pursues by the measurement of asymmetries of the BH-DVCS cross section in relation to the beam charge, the beam polarization, or the target polarization. The HERMES spectrometer was constructed in order to measure semi-inclusive and inclusive DIS processes. The extraction of the azimutal asymmetries in relation to the beam helicity from the data of 2007 at the hydrogen target were performed in this thesis. The extracted asymmetry amplitudes from the elastic BH/DVCS process agree well with the earlier measurements of HERMES. Furthermore for the first time the asymmetry of Δ + resonances was extracted, however the events are because of the low statistics affect with large uncertainties

Spin transfer coefficient DΛLL to Λ hyperon in semi-inclusive DIS at HERMES

International Nuclear Information System (INIS)

Belostotski, S; Veretennikov, D; Naryshkin, Yu

2011-01-01

Three components of the spin transfer coefficient from the longitudinally polarized electron/positron beam to the Λ or Λ-bar hyperon have been measured in the HERMES experiment. Kinematical dependencies of the spin-transfer have been studied. Averaged over Λ kinematics, longitudinal component of the spin transfer DΛ LL (along the virtual photon direction) to the Λ hyperon is found to be DΛ LL = 0.19 ± 0.04 stat ± 0.02 syst .

The construction of a high resolution crystal backscattering spectrometer HERMES I

Energy Technology Data Exchange (ETDEWEB)

Larese, J.Z.

1998-11-01

There is a need in the United States for a state-of-the-art, cold-neutron, crystal backscattering spectrometer (CBS) designed to investigate the structure and dynamics of condensed matter systems by the simultaneous utilization of long wavelength elastic diffraction and high-energy-resolution inelastic scattering. Cold neutron spectroscopy with CBS-type instruments has already made many important contributions to the study of atomic and molecular diffusion in biomaterials, polymers, semiconductors, liquid crystals, superionic conductors and the like. Such instruments have also been invaluable for ultra high resolution investigations of the low-lying quantum tunneling processes that provide direct insight into the dynamical response of solids at the lowest energies. Until relatively recently, however, all such instruments were located at steady-state reactors. This proposal describes HERMES I (High Energy Resolution Machines I) a CBS intended for installation at the LANSCE pulsed neutron facility of Los Alamos National Laboratory. As explained in detail in the main text, the authors propose to construct an updated, high-performance CBS which incorporates neutron techniques developed during the decade since IRIS was built, i.e., improved supermirror technology, a larger area crystal analyzer and high efficiency wire gas detectors. The instrument is designed in such a way as to be readily adaptable to future upgrades. HERMES I, they believe, will substantially expand the range and flexibility of neutron investigations in the United States and open new and potentially fruitful directions for condensed matter exploration. This document describes a implementation plan with a direct cost range between $4.5 to 5.6 M and scheduled duration of 39--45 months for identified alternatives.

The construction of a high resolution crystal backscattering spectrometer HERMES I

International Nuclear Information System (INIS)

Larese, J.Z.

1998-01-01

There is a need in the United States for a state-of-the-art, cold-neutron, crystal backscattering spectrometer (CBS) designed to investigate the structure and dynamics of condensed matter systems by the simultaneous utilization of long wavelength elastic diffraction and high-energy-resolution inelastic scattering. Cold neutron spectroscopy with CBS-type instruments has already made many important contributions to the study of atomic and molecular diffusion in biomaterials, polymers, semiconductors, liquid crystals, superionic conductors and the like. Such instruments have also been invaluable for ultra high resolution investigations of the low-lying quantum tunneling processes that provide direct insight into the dynamical response of solids at the lowest energies. Until relatively recently, however, all such instruments were located at steady-state reactors. This proposal describes HERMES I (High Energy Resolution Machines I) a CBS intended for installation at the LANSCE pulsed neutron facility of Los Alamos National Laboratory. As explained in detail in the main text, the authors propose to construct an updated, high-performance CBS which incorporates neutron techniques developed during the decade since IRIS was built, i.e., improved supermirror technology, a larger area crystal analyzer and high efficiency wire gas detectors. The instrument is designed in such a way as to be readily adaptable to future upgrades. HERMES I, they believe, will substantially expand the range and flexibility of neutron investigations in the United States and open new and potentially fruitful directions for condensed matter exploration. This document describes a implementation plan with a direct cost range between $4.5 to 5.6 M and scheduled duration of 39--45 months for identified alternatives

HERMES: towards an integrated toolbox to characterize functional and effective brain connectivity.

Science.gov (United States)

Niso, Guiomar; Bruña, Ricardo; Pereda, Ernesto; Gutiérrez, Ricardo; Bajo, Ricardo; Maestú, Fernando; del-Pozo, Francisco

2013-10-01

The analysis of the interdependence between time series has become an important field of research in the last years, mainly as a result of advances in the characterization of dynamical systems from the signals they produce, the introduction of concepts such as generalized and phase synchronization and the application of information theory to time series analysis. In neurophysiology, different analytical tools stemming from these concepts have added to the 'traditional' set of linear methods, which includes the cross-correlation and the coherency function in the time and frequency domain, respectively, or more elaborated tools such as Granger Causality.This increase in the number of approaches to tackle the existence of functional (FC) or effective connectivity (EC) between two (or among many) neural networks, along with the mathematical complexity of the corresponding time series analysis tools, makes it desirable to arrange them into a unified-easy-to-use software package. The goal is to allow neuroscientists, neurophysiologists and researchers from related fields to easily access and make use of these analysis methods from a single integrated toolbox.Here we present HERMES ( http://hermes.ctb.upm.es ), a toolbox for the Matlab® environment (The Mathworks, Inc), which is designed to study functional and effective brain connectivity from neurophysiological data such as multivariate EEG and/or MEG records. It includes also visualization tools and statistical methods to address the problem of multiple comparisons. We believe that this toolbox will be very helpful to all the researchers working in the emerging field of brain connectivity analysis.

The HERMES dual-radiator ring imaging Cherenkov detector

CERN Document Server

Akopov, N; Bailey, K; Bernreuther, S; Bianchi, N; Capitani, G P; Carter, P; Cisbani, E; De Leo, R; De Sanctis, E; De Schepper, D; Dzhordzhadze, V; Filippone, B W; Frullani, S; Garibaldi, F; Hansen, J O; Hommez, B; Iodice, M; Jackson, H E; Jung, P; Kaiser, R; Kanesaka, J; Kowalczyk, R; Lagamba, L; Maas, A; Muccifora, V; Nappi, E; Negodaeva, K; Nowak, Wolf-Dieter; O'Connor, T; O'Neill, T G; Potterveld, D H; Ryckbosch, D; Sakemi, Y; Sato, F; Schwind, A; Shibata, T A; Suetsugu, K; Thomas, E; Tytgat, M; Urciuoli, G M; Van De Kerckhove, K; Van De Vyver, R; Yoneyama, S; Zhang, L F; Zohrabyan, H G

2002-01-01

The construction and use of a dual radiator Ring Imaging Cherenkov (RICH) detector is described. This instrument was developed for the HERMES experiment at DESY which emphasises measurements of semi-inclusive deep-inelastic scattering. It provides particle identification for pions, kaons, and protons in the momentum range from 2 to 15 GeV, which is essential to these studies. The instrument uses two radiators, C sub 4 F sub 1 sub 0 , a heavy fluorocarbon gas, and a wall of silica aerogel tiles. The use of aerogel in a RICH detector has only recently become possible with the development of clear, large, homogeneous and hydrophobic aerogel. A lightweight mirror was constructed using a newly perfected technique to make resin-coated carbon-fiber surfaces of optical quality. The photon detector consists of 1934 photomultiplier tubes (PMT) for each detector half, held in a soft steel matrix to provide shielding against the residual field of the main spectrometer magnet.

Spin Density Matrix Elements in exclusive production of ω mesons at Hermes

Directory of Open Access Journals (Sweden)

Marianski B.

2014-03-01

Full Text Available Spin density matrix elements have been determined for exclusive ω meson production on hydrogen and deuterium targets, in the kinematic region of 1.0 < Q2 < 10.0 GeV2, 3.0 < W < 6.3 GeV and –t' < 0.2 GeV2. The data, from which SDMEs are determined, were accumulated with the HERMES forward spectrometer during the running period of 1996 to 2007 using the 27.6 GeV electron or positron beam of HERA. A sizable contribution of unnatural parity exchange amplitudes is found for exclusive ω meson production.

75 FR 23654 - Endangered and Threatened Wildlife and Plants; 90-Day Finding on a Petition to List Hermes Copper...

Science.gov (United States)

2010-05-04

... considered an animal species-at-risk by the U.S. Forest Service; defined specifically, as an uncommon, narrow... butterfly. According to the petition, a company called ``Morningstar Flower and Vibrational Essences'' markets a Hermes copper ``butterfly essence'' through their website. The petitioner states it is unclear...

La question du « sujet » dans l’herméneutique gadamérienne.

Directory of Open Access Journals (Sweden)

Guy Deniau

2005-03-01

Full Text Available L’herméneutique philosophique de Gadamer se présente comme une tentative de libérer la question de la vérité de l’étroitesse dans laquelle le concept moderne de méthode l’aurait cantonnée. Pour ce faire, elle interroge des expériences (l’art, l’histoire, le langage dont l’ampleur ne se laisse pas réduire au primat de la conscience certaine de soi. C’est pourquoi la critique de la méthode moderne qu’opère l’herméneutique en interrogeant l’expérience de la compréhension est en même temps une critique du fondement de cette méthode, c’est-à-dire de la subjectivité, de la conscience certaine de soi. L’objet de cette étude est de mettre en évidence la cohérence et l’unité de ce qui vient dans l’herméneutique se substituer, sous diverses figures apparemment éparses, au « sujet » : la question du « sujet » y devient celle du « sujet » comme question.Gadamer’s philosophical hermeneutics presents itselfs as an attempt to liberate the question of the truth in which the modern concept of method should have it confined. So Gadamer analyses experiences (art, history, language whose extent can’t be reduced to the primacy of selfconsciousness. So the critic of modern method by hermeneutics is at the same time the critic of its foundation, that is to say of the subjectivity, of the certainty of selfsconsciousness. The intention of this study is to bring foreward the coherence and the unity of Gadamer’s diverses remarks about what comes after subjectivity : the question of « subject » becomes the one of the « subject » as a question.

2006 Reson 8101ER Multibeam Sonar Data from Cruise AHI-06-09 - Kure Atoll, Pearl and Hermes Atoll and Kauai Island

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — Reson 8101ER multibeam Data were collected from 23 June to 19 July 2006 aboard NOAA Survey Launch Acoustic Habitat Investigator (AHI) at Kure Atoll, Pearl and Hermes...

Environmental predictors of shrubby cinquefoil (Dasiphora fruticosa) habitat and quality as host for Maine’s endangered Clayton’s copper butterfly (Lycaena dorcas claytoni)

Science.gov (United States)

Drahovzal, Sarah A.; Loftin, Cynthia S.; Rhymer, Judith

2015-01-01

Population size of habitat-specialized butterflies is limited in part by host plant distribution and abundance. Effective conservation for host-specialist species requires knowledge of host-plant habitat conditions and relationships with the specialist species. Clayton’s copper butterfly (Lycaena dorcas claytoni) is a Maine state-endangered species that relies exclusively on shrubby cinquefoil (Dasiphora fruticosa) as its host. Dasiphora fruticosa occurs in 28 wetlands in Maine, ten of which are occupied by L. d. claytoni. Little is known about environmental conditions that support large, persistent stands of D. fruticosa in Maine. We evaluated the environment (hydrology, pore water and peat nutrients) associated with D. fruticosa distribution, age, and condition in Maine wetlands supporting robust stands of D. fruticosa to compare with L. d. claytoni occurrence. Although dominant water source in D. fruticosa—containing wetlands included both groundwater discharge and surface-flow, D. fruticosa coverage was greater in wetlands with consistent growing season water levels that dropped into or below the root zone by late season, and its distributions within wetlands reflected pore water hydrogen ion and conductivity gradients. Flooding magnitude and duration were greatest during the L.d. claytoni larval feeding period, whereas, mean depth to water table and upwelling increased and were most variable following the L. d. claytoni egg-laying period that precedes D. fruticosa senescence. Oldest sampled shrubs were 37 years, and older shrubs were larger and slower-growing. Encounter rates of L. d. claytoni were greater in wetlands with larger D. fruticosa plants of intermediate age and greater bloom density. Wetland management that combines conditions associated with D. fruticosa abundance (e.g., non-forested, seasonally consistent water levels with high conductivity) and L. d. claytoni occurrence (e.g., drawdown below the root zone following egg-laying, abundant

Recent HERMES results from inclusive and semi-inclusive hadron production

Directory of Open Access Journals (Sweden)

Van Hulse Charlotte

2015-01-01

Full Text Available Hermes collected a wealth of data using the 27.6 GeV polarized Hera lepton beam and various pure, polarized and unpolarized, gaseous targets. This unique data set opens the door to various measurements sensitive to the multi-dimensional structure of the nucleon. Among them are two-hadron production in semi-inclusive deep-inelastic scattering on a transversely polarized target, providing access to different transverse-momentum-dependent distribution and fragmentation functions in a way complementary to single-hadron production. Also transverse-target single-spin asymmetries in inclusive electroproduction of charged pions and kaons have been recently extracted, complementing data from proton-proton collisions, where large, so far unexplained, asymmetries have been observed. From inclusive measurements on various nuclear targets, the Λ polarization is extracted, also here complementing measurements in proton-proton collisions.

The construction of a microstrip gas tracker for Hermes

International Nuclear Information System (INIS)

Brand, J. van den

1994-01-01

To measure the spin structure of the nucleon, the HERMES experiment is planned at the HERA electron beam using a polarised internal gas target. A tracker is being built to reconstruct the vertex of the exciting particles. It consists of two drift chambers and two microstrip gas counter (MSGC) systems. The MSGC systems are housed into two gas gatight containers surrounding the beam pipe and located immediately after the exit flange of the target housing. The active area of the upper MSGC system covers an angular range of 40 mrad≤θ v ≤ 140 mrad by -170 mrad≤θ h ≤170 mrad. Below the beam pipe a second system is situated with the same acceptance. Each track within the acceptance is measured by two stations of three MSCGs having a strip orientation, of 0 , and +30 and -30 respectively with respect to the vertical axis. (HSI)

A HIGH-RESOLUTION, MULTI-EPOCH SPECTRAL ATLAS OF PECULIAR STARS INCLUDING RAVE, GAIA , AND HERMES WAVELENGTH RANGES

International Nuclear Information System (INIS)

Tomasella, Lina; Munari, Ulisse; Zwitter, Tomaz

2010-01-01

We present an Echelle+CCD, high signal-to-noise ratio, high-resolution (R = 20,000) spectroscopic atlas of 108 well-known objects representative of the most common types of peculiar and variable stars. The wavelength interval extends from 4600 to 9400 A and includes the RAVE, Gaia, and HERMES wavelength ranges. Multi-epoch spectra are provided for the majority of the observed stars. A total of 425 spectra of peculiar stars, which were collected during 56 observing nights between 1998 November and 2002 August, are presented. The spectra are given in FITS format and heliocentric wavelengths, with accurate subtraction of both the sky background and the scattered light. Auxiliary material useful for custom applications (telluric dividers, spectrophotometric stars, flat-field tracings) is also provided. The atlas aims to provide a homogeneous database of the spectral appearance of stellar peculiarities, a tool useful both for classification purposes and inter-comparison studies. It could also serve in the planning and development of automated classification algorithms designed for RAVE, Gaia, HERMES, and other large-scale spectral surveys. The spectrum of XX Oph is discussed in some detail as an example of the content of the present atlas.

Cadmium tolerance and accumulation characteristics of mature flax, cv. Hermes: Contribution of the basal stem compared to the root

Energy Technology Data Exchange (ETDEWEB)

Douchiche, Olfa, E-mail: olfa.douchiche@hotmail.fr [Laboratory Glyco-MEV EA 4358, IFRMP 23, University of Rouen, 76821 Mont Saint Aignan Cedex (France); Laboratory Biologie et Physiologie Cellulaires Vegetales, Department of Biology, University of Tunis, 1060 Tunis (Tunisia); Chaiebi, Wided [Laboratory Biologie et Physiologie Cellulaires Vegetales, Department of Biology, University of Tunis, 1060 Tunis (Tunisia); Morvan, Claudine, E-mail: claudine.morvan@univ-rouen.fr [Laboratory PBS-UMR 6270 CNRS, FR 3038, University of Rouen, 76821 Mont Saint Aignan Cedex (France)

2012-10-15

Highlights: Black-Right-Pointing-Pointer Cd accumulated in stem bottom part exceeded the defined hyperaccumulator threshold. Black-Right-Pointing-Pointer No toxic symptoms occurred and TI of all growth parameters ranged between 0.7 and 1. Black-Right-Pointing-Pointer The high level of Zn, Mn and Cu may contribute to the absence of chlorosis in stem. Black-Right-Pointing-Pointer Cd/Ca synergistic effect observed in the stem may alleviate Cd toxicity. Black-Right-Pointing-Pointer Hermes variety accumulated more Cd than the other flax varieties ever described. - Abstract: The potential of mature flax plants (cv. Hermes) to tolerate and accumulate cadmium (Cd) was studied to determine which part of the plant would be the key organ for phytoremediation purposes. After 4 month-growth on sand substrate containing 0.1 mM Cd in a greenhouse, the roots and stems were separated and the stems were divided into three parts. The effects of Cd were studied on growth parameters, histology and mineral nutrition. No visible toxic symptoms were observed. Tolerance-index values calculated from growth parameters and nutrients remained relatively high, allowing the development of the plant until maturity and formation of seeds. The roots and bottom stem accumulated the highest quantity of Cd (750 and 360 mg/kg dry matter), values which largely exceeded the threshold defined for hyperaccumulators. On the other hand, basal stem had a high bioconcentration factor (BCF = 32) and translocation factor TF Prime (2.5) but a low TF (0.5), indicating that this basal part would play a major role in phytoremediation (phytostabilization rather than phytorextraction). Therefore, the high tolerance to Cd and accumulation capacity make possible to grow Hermes flax on Cd-polluted soils.

Les représentations du dieu Hermès et du couple Hestia-Hermès dans le cinéma américain des années 1930 à nos jours

OpenAIRE

Bloch , Jérôme

2012-01-01

ISBN 978-606-14-0550-3; International audience; S'inscrivant dans une démarche analytique et comparative, à la croisée de disciplines aussi fécondes que diversifiées -- l'histoire du cinéma, l'analyse filmique et littéraire, les gender studies... -- notre communication s'attache à dresser un panorama exhaustif des films américains mettant en scène la figure d'Hermès. Suivant une approche chronologique, notre démonstration s'appuie sur l'étude d'une dizaine de films produits sur le territoire ...

[A history of Korean medical association's emblem: the caduceus of Asklepios and Hermes].

Science.gov (United States)

Shin, Young-Jeon

2007-06-01

An emblem represents the identity of an organization. Through the emblem of an organization, they differentiate the members from others and reinforce the membership, homogeneity, and pride. It is also a tool that an organization officially publicizes its mission and values. The symbol designed by Cho, Byungduk was announced as the first emblem of Korean Medical Association (KMA) on October 31st 1947. His design work has the caduceus with the Taeguk sign on the top, the symbol of Korea, and the Red Cross in the background including the name, 'KMA'. Since then, the emblem was revised three times: in 1964, 1973, and 1995. The current symbol is based on the design of the first one. Although Asklepian, the single serpent-entwined staff of Asklepios, is the one known as the symbol of medicine, this emblem takes the caduceus of Hermes who is the patron god of merchants, thieves, and travelers. The mistake comes from the unawareness of the distinction between the caduceus of Asklepios and Hermes. Moreover, it proves that U. S. Army Medical Corps (USAMC) heavily influenced the reconstruction of Korean health care system including KMA. The USAMC has used the symbol of caduceus since 1902. In 1947, the year that the first emblem of KMA was established, Southern part of Korea was governed by the United States Military Government (USMG, 1945-1948). The current emblem of KMA brings up a question whether we should continue to use the symbol that was taken from USMAC in the historical period of USMG governance. Celebrating 100th anniversary year of KMA, KMA needs to re-evaluate the appropriateness of the KMA symbol.

PACS and SPIRE photometer maps of M33 : First results of the HERschel M33 Extended Survey (HERM33ES)

NARCIS (Netherlands)

Kramer, C.; Buchbender, C.; Xilouris, E. M.; Boquien, M.; Braine, J.; Calzetti, D.; Lord, S.; Mookerjea, B.; Quintana-Lacaci, G.; Relano, M.; Stacey, G.; Tabatabaei, F. S.; Verley, S.; Aalto, S.; Akras, S.; Albrecht, M.; Anderl, S.; Beck, R.; Bertoldi, F.; Combes, F.; Dumke, M.; Garcia-Burillo, S.; Gonzalez, M.; Gratier, P.; Guesten, R.; Henkel, C.; Israel, F. P.; Koribalski, B.; Lundgren, A.; Martin-Pintado, J.; Roellig, M.; Rosolowsky, E.; Schuster, K. F.; Sheth, K.; Sievers, A.; Stutzki, J.; Tilanus, R.P.J.; van der Tak, F.; Wiedner, M. C.; van der Werf, Paul P.

Context. Within the framework of the HERM33ES key program, we are studying the star forming interstellar medium in the nearby, metal-poor spiral galaxy M33, exploiting the high resolution and sensitivity of Herschel. Aims. We use PACS and SPIRE maps at 100, 160, 250, 350, and 500 mu m wavelength, to

Design and construction of a scintillating fibre tracker for measuring hard exclusive reactions at HERMES

Energy Technology Data Exchange (ETDEWEB)

Hoek, M.

2006-09-15

In the framework of this thesis the planning and the construction of a track-reconstruction detector consisting of scintillating fibers (SFT) for the HERMES recoil detector is described. The SFT as one of the main components of the recoil detector serves for the momentum determination for charged particles in the momentum range of 250-1400 MeV/c. Furthermore it contributes to the particle identification of protons and charged pions. The optical readout of the fibers pursues with secondary-electron multipliers, which must be positioned beyond the magnetic field of the recoil-detector magnet.

Design and construction of a scintillating fibre tracker for measuring hard exclusive reactions at HERMES

International Nuclear Information System (INIS)

Hoek, M.

2006-07-01

In the framework of this thesis the planning and the construction of a track-reconstruction detector consisting of scintillating fibers (SFT) for the HERMES recoil detector is described. The SFT as one of the main components of the recoil detector serves for the momentum determination for charged particles in the momentum range of 250-1400 MeV/c. Furthermore it contributes to the particle identification of protons and charged pions. The optical readout of the fibers pursues with secondary-electron multipliers, which must be positioned beyond the magnetic field of the recoil-detector magnet

Single-spin asymmetry in electro-production of π+ π- pairs from a transversely polarized proton target at the HERMES experiment

International Nuclear Information System (INIS)

Lu, Xiao-Rui

2008-09-01

In this thesis, the measurement of an azimuthal amplitude of the asymmetry in the lepto-production of π + π - pairs at the HERMES experiment is reported. The experiment was carried out at DESY in Germany, utilizing the longitudinally polarized 27.6 GeV electron/positron beam of the HERA storage ring in combination with a longitudinally or transversely polarized gaseous target internal to the beam pipe. For the present measurement, the transversely polarized proton target was used and the beam polarization was averaged out in order to measure the asymmetry A UT . A Ring Imaging Cerenkov (RICH) detector allows the precise identification of pions, kaons and protons over essentially the entire momentum range of the experiment. The asymmetry A UT for π + π - pair production was measured for the first time in the world by HERMES. The amplitudes are extracted as functions of different kinematic variables, which can facilitate the comparison with the theoretical models and the extraction of transversity with combination of the measurement of the dihadron fragmentation function. (orig.)

Theory, Solution Methods, and Implementation of the HERMES Model

Energy Technology Data Exchange (ETDEWEB)

Reaugh, John E. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); White, Bradley W. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Curtis, John P. [Atomic Weapons Establishment (AWE), Reading, Berkshire (United Kingdom); Univ. College London (UCL), Gower Street, London (United Kingdom); Springer, H. Keo [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

2017-07-13

The HERMES (high explosive response to mechanical stimulus) model was developed over the past decade to enable computer simulation of the mechanical and subsequent energetic response of explosives and propellants to mechanical insults such as impacts, perforations, drops, and falls. The model is embedded in computer simulation programs that solve the non-linear, large deformation equations of compressible solid and fluid flow in space and time. It is implemented as a user-defined model, which returns the updated stress tensor and composition that result from the simulation supplied strain tensor change. Although it is multi-phase, in that gas and solid species are present, it is single-velocity, in that the gas does not flow through the porous solid. More than 70 time-dependent variables are made available for additional analyses and plotting. The model encompasses a broad range of possible responses: mechanical damage with no energetic response, and a continuous spectrum of degrees of violence including delayed and prompt detonation. This paper describes the basic workings of the model.

Transverse target moments of dihadron production in semi-inclusive deep inelastic scattering at HERMES

International Nuclear Information System (INIS)

Gliske, Stephen V.

2011-09-01

Pseudo-scalar meson production in semi-inclusive deep inelastic scattering (SIDIS) at HERMES has provided essential information towards the understanding of the transverse momentum dependent structure of the proton. SIDIS dihadron (hadron pair) production also provides access to the structure of the proton and is complimentary to that provided by pseudo-scalars production, as the same parton distribution functions are involved. For example, while pion and kaon final states allow access to flavor combinations of the Sivers distribution function, SIDIS φ meson production (included in the K + K - dihadron sample) allows direct access to the Sivers function for the strange quarks. The Sivers function for strange quarks is also related to the orbital angular momentum of the gluons. In the SIDIS cross section, the distribution functions are integrated with fragmentation functions for the respective final states. These fragmentation functions yield information regarding the quark hadronization process. Of particular interest, the Lund/Artru model of fragmentation makes specific predictions regarding the relation between results for dihadron and pseudo-scalar meson production for certain transverse momentum dependent moments. This dissertation presents the first transverse momentum dependent (non-collinear) analysis of the transverse target moments in SIDIS dihadron production, extracting results from the 2002-2005 HERMES data set for π + π 0 , π + π - , π - π 0 and K + K - dihadrons. A new transverse momentum dependent Monte Carlo generator, TMDGen, is also introduced. Additionally, several theoretical developments have been completed, including a new partial wave analysis of the fragmentation functions, computation of the next-to-leading twist dihadron cross section, and the first model calculation for transverse momentum dependent dihadron fragmentation functions. (orig.)

On extracting hadron multiplicities and unpolarized nucleon structure ratios from SIDIS data at the HERMES experiment

Science.gov (United States)

Linden-Levy, Loren Alexander

2008-10-01

We present an analysis using the world's largest data set of semi-inclusive deep inelastic scattering (SIDIS) in the kinematic range 0.1 running (especially in 2002 and 2004) make the HERMES data invaluable for reinforcing the E866/NuSea Drell-Yan result on d/ u at a different and from an entirely different physical process. These PDF extractions are also an important test of many typical assumptions made in SIDIS analyses and must be taken into consideration in light of the future facilities that propose to use this technique.

Transverse target moments of dihadron production in semi-inclusive deep inelastic scattering at HERMES

Energy Technology Data Exchange (ETDEWEB)

Gliske, Stephen V.

2011-09-15

Pseudo-scalar meson production in semi-inclusive deep inelastic scattering (SIDIS) at HERMES has provided essential information towards the understanding of the transverse momentum dependent structure of the proton. SIDIS dihadron (hadron pair) production also provides access to the structure of the proton and is complimentary to that provided by pseudo-scalars production, as the same parton distribution functions are involved. For example, while pion and kaon final states allow access to flavor combinations of the Sivers distribution function, SIDIS {phi} meson production (included in the K{sup +}K{sup -} dihadron sample) allows direct access to the Sivers function for the strange quarks. The Sivers function for strange quarks is also related to the orbital angular momentum of the gluons. In the SIDIS cross section, the distribution functions are integrated with fragmentation functions for the respective final states. These fragmentation functions yield information regarding the quark hadronization process. Of particular interest, the Lund/Artru model of fragmentation makes specific predictions regarding the relation between results for dihadron and pseudo-scalar meson production for certain transverse momentum dependent moments. This dissertation presents the first transverse momentum dependent (non-collinear) analysis of the transverse target moments in SIDIS dihadron production, extracting results from the 2002-2005 HERMES data set for {pi}{sup +}{pi}{sup 0}, {pi}{sup +}{pi}{sup -}, {pi}{sup -}{pi}{sup 0} and K{sup +}K{sup -} dihadrons. A new transverse momentum dependent Monte Carlo generator, TMDGen, is also introduced. Additionally, several theoretical developments have been completed, including a new partial wave analysis of the fragmentation functions, computation of the next-to-leading twist dihadron cross section, and the first model calculation for transverse momentum dependent dihadron fragmentation functions. (orig.)

Single-spin asymmetry in electro-production of {pi}{sup +} {pi}{sup -} pairs from a transversely polarized proton target at the HERMES experiment

Energy Technology Data Exchange (ETDEWEB)

Lu, Xiao-Rui

2008-10-15

In this thesis, the measurement of an azimuthal amplitude of the asymmetry in the lepto-production of {pi}{sup +}{pi}{sup -} pairs at the HERMES experiment is reported. The experiment was carried out at DESY in Germany, utilizing the longitudinally polarized 27.6 GeV electron/positron beam of the HERA storage ring in combination with a longitudinally or transversely polarized gaseous target internal to the beam pipe. For the present measurement, the transversely polarized proton target was used and the beam polarization was averaged out in order to measure the asymmetry A{sub UT}. A Ring Imaging Cerenkov (RICH) detector allows the precise identification of pions, kaons and protons over essentially the entire momentum range of the experiment. The asymmetry A{sub UT} for {pi}{sup +}{pi}{sup -} pair production was measured for the first time in the world by HERMES. The amplitudes are extracted as functions of different kinematic variables, which can facilitate the comparison with the theoretical models and the extraction of transversity with combination of the measurement of the dihadron fragmentation function. (orig.)

Ghirlandaio, Ficino and Hermes Trismegistus: the Prisca Theologia in the Tornabuoni Frescoes

Directory of Open Access Journals (Sweden)

Agata Anna Chrzanowska

2016-12-01

Full Text Available The study offers a Neoplatonic reading of certain iconographic elements of Domenico Ghirlandaio’s frescoes in the Tornabuoni Chapel in Florence. It focuses on the nude figure sitting on the steps in the “Presentation of the Virgin in the Temple” as well as the group of four listeners gathered on the right in the “Preaching of St. John the Baptist”. Following an investigation of the relationship between these figures and Marsilio Ficino’s philosophical ideas and the apocryphal gospels the author suggests that the nude represents Saturn and that the four men are Ficino’s famiglia filosofica: Hermes Trismegistus, Moses, Aristotle and Plato. This analysis therefore attempts to show that the decoration not only expresses the political supremacy of the Medicean faction but also conveys Ficino’s ideas about the prisca theologia.

El Hermes de Eratóstenes: apuntes filológicos e histórico literarios

OpenAIRE

Baptista-Sánchez, Ana Isabel; Castro-Páez, Encarnación

2017-01-01

Eratóstenes escribió un poema titulado Hermes del que apenas conservamos unas decenas de hexámetros. En el fragmento más amplio (F16) se presenta, en clave poética y mitológica, una descripción de la Tierra en zonas. Por sus características formales, este poema ha sido clasificado por la crítica textual como poesía didáctica. No obstante, el posicionamiento de Eratóstenes ante Homero y su valoración de la poesía nos hacen replantearnos, en esta comunicación, esta clasificación ‒basada en crit...

Measurement of aerogel performance for ring image Cherenkov detector of HERMES

International Nuclear Information System (INIS)

Kanesaka, Jiro; Zhang Linfeng; Sato, Fumiko; Suetsugu, Kentaro; Sakami, Yasuhiro; Shibata, Toshiaki

1999-01-01

The first experiment of ring image Cherenkov detector (RICH) used aerogel in the world was reported in this paper. We built RICH using aerogel as illuminant for HERMES. The refractive index and size of all aerogel tiles were measured in order to select them for construction of RICH. The select conditions of tile were 113.1 -4 , the dispersion of refractive index of aerogel tile, which condition was fitted to the accuracy of Cherenkov light emission angle of RICH. The mean thickness, transmission and reflection of tile, the thickness of corner of tile (thickness of surface), the refractive index dependence on position and temperature were measured. The effect of thickness of tile on the shift of Cherenkov emission angle was 6.1% the maximum value per one tile and 0.18% mean value of center. The effect of position dependence of refractive index on the Cherenkov light emission angle was agreed with the effect of dispersion of thickness of tile. The transmission and reflection of tile were almost same as the theoretical value. (S.Y.)

Andrea. Hermínio Martins, il principio vichiano del verum factum e l’era ciberscientifica

Directory of Open Access Journals (Sweden)

Mazzola, Andrea

2015-08-01

Full Text Available Hermínio Martins, Vico’s verum-factum principle and the cyber-scientific age. In the context of technological civilization agribusiness techniques, biotechnology, ICT, AI programs, robotics and nanotechnology bring into question the humanistic character of scientific knowledge. Vico’s verum-factum principle seems inadequate to describe the serendipity and the irreversible side effects of engineering and industrial technology. First technoscience, then cyberscience, transform the human epistemic adventure in a risk and uncertainty factor for the survival of the species. The knowledge-power equivalence adds artificial vulnerability to natural vulnerability. The progress of technological innovation takes on characteristics of autonomy, incomprehensibility and uncontrollability which are dismissing man from the status of master of its own historical destiny.

Deflagration to Detonation Transition (DDT) Simulations of HMX Powder Using the HERMES Model

Science.gov (United States)

White, Bradley; Reaugh, John; Tringe, Joseph

2017-06-01

We performed computer simulations of DDT experiments with Class I HMX powder using the HERMES model (High Explosive Response to MEchanical Stimulus) in ALE3D. Parameters for the model were fitted to the limited available mechanical property data of the low-density powder, and to the Shock to Detonation Transition (SDT) test results. The DDT tests were carried out in steel-capped polycarbonate tubes. This arrangement permits direct observation of the event using both flash X-ray radiography and high speed camera imaging, and provides a stringent test of the model. We found the calculated detonation transition to be qualitatively similar to experiment. Through simulation we also explored the effects of confinement strength, the HMX particle size distribution and porosity on the computed detonation transition location. This work was performed under the auspices of the US DOE by LLNL under Contract DE-AC52-07NA27344.

Deeply Virtual Compton Scattering off an unpolarized hydrogen target at the HERMES experiment

Energy Technology Data Exchange (ETDEWEB)

Zeiler, Dietmar

2009-11-15

The structure of this thesis is as follows: In the second chapter the theoretical basis needed for the description of the exclusive electro-production of photons in the framework of GPDs is explained. Three different models are discussed and experimental observables are defined. The third chapter includes a description of the Hermes experiment and its components. The data analysis is discussed in chapter four, along with various studies both on real and Monte Carlo data and the derivations of the systematic uncertainties. In chapter five the present results are given and interpreted both from an experimental point of view, and in comparison to existing models. Conclusion from the results are drawn. Furthermore the calibration of the Recoil Silicon Detector and the performance of the complete Recoil Detector is outlined in chapter six. In chapter seven an outlook is presented followed by the summary. (orig.)

Deeply Virtual Compton Scattering off an unpolarized hydrogen target at the HERMES experiment

International Nuclear Information System (INIS)

Zeiler, Dietmar

2009-11-01

The structure of this thesis is as follows: In the second chapter the theoretical basis needed for the description of the exclusive electro-production of photons in the framework of GPDs is explained. Three different models are discussed and experimental observables are defined. The third chapter includes a description of the Hermes experiment and its components. The data analysis is discussed in chapter four, along with various studies both on real and Monte Carlo data and the derivations of the systematic uncertainties. In chapter five the present results are given and interpreted both from an experimental point of view, and in comparison to existing models. Conclusion from the results are drawn. Furthermore the calibration of the Recoil Silicon Detector and the performance of the complete Recoil Detector is outlined in chapter six. In chapter seven an outlook is presented followed by the summary. (orig.)

The HERMES polarized hydrogen and deuterium gas target in the HERA electron storage ring

International Nuclear Information System (INIS)

Airapetian, A.; Akopov, N.; Akopov, Z.

2005-01-01

The HERMES hydrogen and deuterium nuclear-polarized gas targets have been in use since 1996 with the polarized electron beam of HERA at DESY to study the spin structure of the nucleon. Polarized atoms from a Stern-Gerlach Atomic Beam Source are injected into a storage cell internal to the HERA electron ring. Atoms diffusing from the center of the storage cell into a side tube are analyzed to determine the atomic fraction and the atomic polarizations. The atoms have a nuclear polarization, the axis of which is defined by an external magnetic holding field. The holding field was longitudinal during 1996-2000, and was changed to transverse in 2001. The design of the target is described, the method for analyzing the target polarization is outlined, and the performance of the target in the various running periods is presented

The HERMES polarized hydrogen and deuterium gas target in the HERA electron storage ring

International Nuclear Information System (INIS)

Airapetian, A.; Akopov, N.; Akopov, Z.; Peking University, Beijing

2004-08-01

The HERMES hydrogen and deuterium nuclear-polarized gas targets have been in use since 1996 with the polarized electron beam of HERA at DESY to study the spin structure of the nucleon. Polarized atoms from a Stern-Gerlach Atomic Beam Source are injected into a storage cell internal to the HERA electron ring. Atoms diffusing from the center of the storage cell into a side tube are analyzed to determine the atomic fraction and the atomic polarizations. The atoms have a nuclear polarization, the axis of which is defined by an external magnetic holding field. The holding field was longitudinal during 1996-2000, and was changed to transverse in 2001. The design of the target is described, the method for analyzing the target polarization is outlined, and the performance of the target in the various running periods is presented. (orig.)

Metodologia psicopatológica e ética em psicanálise: o princípio da alteridade hermética

Directory of Open Access Journals (Sweden)

Nelson da Silva Junior

Full Text Available A compreensão da metapsicologia como sistema causal de representação da subjetividade exclui implicitamente a legitimidade do registro da ética como tal. Contra tal compreensão, apresentamos a noção de alteridade hermética enquanto um princípio da metodologia psicopatológica da psicanálise que não somente convive com a ética, mas ainda que solicita a independência e a transformação dos valores da normalidade.

Análisis del comportamiento de la capacidad frigorífica en compresores herméticos en Cuba. // Behaviour of the refrigeration capacity in hermetic compressors.

Directory of Open Access Journals (Sweden)

K. Arencibia Avila

2004-09-01

Full Text Available El índice de roturas de los compresores herméticos en Cuba (4 % se encuentra muy por encima de los estándaresinternacionales de calidad (0, 04 %. El objetivo del trabajo que se presenta fue la determinación de la capacidad frigoríficaa tres tipos de compresores herméticos diferentes en condiciones ambientales como las existentes en el país. Las pruebasexperimentales se realizaron en laboratorios certificados por las normas ISO 9002 e ISO 14 000.El análisis muestra que se pierde más del 10 % de la capacidad frigorífica del compresor. De ello se deduce que la simpletransferencia de tecnología no puede ser una solución para las necesidades crecientes de equipos de refrigeración en el país.Los equipos y sistemas de este tipo tienen que ser diseñados especialmente para las condiciones cubanas con el objetivo delograr eficiencias aceptables, equivalentes a la media mundial y acorde a la situación energética que afronta el mundoactualmente.Palabras claves: Compresores herméticos, refrigeración.___________________________________________________________________________Abstract.The break rate of hermetic compressors in Cuba (4% is well over the international standards of quality (0. 04 %. Thepurpose of this word was to determine the refrigeration capacity to three kinds of hermetic compressors in environmentalconditions like the ones existing in the country. The experimental test were carried out in laboratories certified by ISO 9002and ISO 14 000.The analysis shows that more than 10 % of the refrigeration capacity of the compressors is lost. We can say that a simpletransference of technology cannot be a solution to the increasing needs of refrigeration equipment. The systems andequipment of this kind have to be specially designed to meet our conditions, with the aim of achieving acceptableefficiencies, similar to those of the world average, and according to the energy situation that the world is facing nowadays.Key Words: Hermetic

Determination of the structure function F{sub 2} at HERMES

Energy Technology Data Exchange (ETDEWEB)

Gabbert, Dominik D.

2008-11-15

In this thesis we present the first measurement of inclusive proton and deuteron deep-inelastic scattering cross sections at the HERMES experiment. The measurement is performed using the 27.6 GeV lepton beam provided by the HERA storage ring in conjunction with hydrogen and deuterium gas targets internal to the beam pipe. The relevant systematic effects such as radiative corrections, detector smearing, acceptance, particle misidentification, misalignment, tracking related effects and trigger efficiencies are taken into account. Based on these results, the structure functions F{sup p}{sub 2} and F{sup d}{sub 2} are determined using the parameterization R{sub 1998} for the longitudinal-to-transverse virtual-photon absorption cross section R. A phenomenological fit of the proton deep-inelastic scattering cross section is performed based on all available data and using photoproduction data in order to pin down the low Q{sup 2} region. A second fit is performed to the world data on the deuteron-to-proton cross section ratio in order to study its Q{sup 2} evolution, the difference between higher twist contributions in proton and deuteron, and the difference between R as obtained from the two targets. It can be confirmed that R obtained for proton and deuteron is in agreement. The Gottfried integral is evaluated from the fit at different values of Q{sup 2}. The result at Q{sup 2}=4 GeV{sup 2} agrees with previous measurements by NMC and no indication for a Q{sup 2} dependence of the Gottfried integral is found. (orig.)

Telos, Chronos, and Hermēneia: The Role of Metanarrative in Leadership Effectiveness through the Production of Meaning

Directory of Open Access Journals (Sweden)

Justin A. Irving

2004-09-01

Full Text Available In this article, we argue for the existence of a relationship between metanarrative and leadership effectiveness that is mediated by personal meaning. After analyzing the relevant literatures, we present a model that attributes this relationship to the capacity of metanarrative to produce meaning through the interpretive frames of Telos (teleological context, Chronos (historical-narrative context, and Hermēneia (interpretive context. We begin with a review of the leadership effectiveness literature followed by a discussion of the theoretical foundations of the concepts of meaning and metanarrative. From this review, we derive a set of propositions that describe the nature of the interrelationships among the constructs of interest and present a theoretical model that captures the proposed relationships. We conclude by suggesting several streams of research designed to evaluate the proposed model and with recommendations for further study.

Optical characterization of n=1.03 silica aerogel used as radiator in the RICH of HERMES

CERN Document Server

Aschenauer, E; Capitani, G P; Carter, P; Casalino, C; Cisbani, E; Coluzza, C; De Leo, R; De Sanctis, E; De Schepper, D; Dzhordzhadze, V; Filippone, B W; Frullani, S; Garibaldi, F; Hansen, J O; Hommez, B; Iodice, M; Jackson, H E; Kaiser, R; Kanesaka, J; Lagamba, L; Muccifora, V; Nappi, E; Nowak, Wolf-Dieter; O'Neill, T G; Potterveld, D; Ryckbosch, D; Sakemi, Y; Sato, F; Schwind, A; Suetsugu, K; Shibata, T A; Thomas, E; Tytgat, M; Urciuoli, G M; Kerckhove, K V D; Vyver, R V D; Yoneyama, S; Zhang, L F

2000-01-01

The optical properties of silica aerogel tiles with a refractive index of 1.03 and dimensions 11x11x1 cm sup 3 , produced by the Matsushita Electric Works (Japan), have been measured in the wavelength range from 200 to 900 nm. The tiles are used as one of the two radiators of the ring imaging Cherenkov counter of the HERMES experiment at DESY-HERA. The transmittance of light has been measured on 200 tiles by means of a double beam spectrophotometer. The light transflectance and reflectance have been measured on one tile by means of a single-beam spectrophotometer and an integrating reflecting sphere. Typical values of the measured transmittances at a wavelength lambda=400 nm are around 0.67. The measured transflectance increases almost linearly from 0.4 to 0.96 in the interval 200-300 nm, and remains nearly constant at the value 0.95 in the complementary lambda-range. The measured reflectance, mostly confined below 400 nm, is completely interpretable as backscattering from inside the aerogel, revealing an abs...

Randomization in clinical trials: stratification or minimization? The HERMES free simulation software.

Science.gov (United States)

Fron Chabouis, Hélène; Chabouis, Francis; Gillaizeau, Florence; Durieux, Pierre; Chatellier, Gilles; Ruse, N Dorin; Attal, Jean-Pierre

2014-01-01

Operative clinical trials are often small and open-label. Randomization is therefore very important. Stratification and minimization are two randomization options in such trials. The first aim of this study was to compare stratification and minimization in terms of predictability and balance in order to help investigators choose the most appropriate allocation method. Our second aim was to evaluate the influence of various parameters on the performance of these techniques. The created software generated patients according to chosen trial parameters (e.g., number of important prognostic factors, number of operators or centers, etc.) and computed predictability and balance indicators for several stratification and minimization methods over a given number of simulations. Block size and proportion of random allocations could be chosen. A reference trial was chosen (50 patients, 1 prognostic factor, and 2 operators) and eight other trials derived from this reference trial were modeled. Predictability and balance indicators were calculated from 10,000 simulations per trial. Minimization performed better with complex trials (e.g., smaller sample size, increasing number of prognostic factors, and operators); stratification imbalance increased when the number of strata increased. An inverse correlation between imbalance and predictability was observed. A compromise between predictability and imbalance still has to be found by the investigator but our software (HERMES) gives concrete reasons for choosing between stratification and minimization; it can be downloaded free of charge. This software will help investigators choose the appropriate randomization method in future two-arm trials.

Deeply Virtual Compton Scattering off a deuterium target at the HERMES experiment

International Nuclear Information System (INIS)

Movsisyan, Aram

2011-05-01

Deeply virtual Compton scattering is studied in this report, using all data collected at the HERMES experiment from 1996 to 2005. Azimuthal asymmetries with respect to beam-helicity, beam-charge and target polarization alone and also to their different combinations for hard exclusive electroproduction of real photons in deep-inelastic scattering from a both unpolarized and longitudinally polarized deuterium targets are measured. The asymmetries are attributed to the interference between the deeply virtual Compton scattering and Bethe-Heitler processes. The asymmetries are observed in the exclusive region -(1.5) 2 GeV 2 2 X 2 GeV 2 of the squared missing mass. The dependences of these asymmetries on -t, x N , or Q 2 are investigated. The results include the coherent process ed→edγ and the incoherent process ed→epnγ where in addition a nucleon may be excited to a resonance. For an unpolarized deuterium target, the leading Fourier amplitude of the beam-helicity asymmetry that is sensitive to the interference term is found to be substantial, but no significant t dependence is observed. The leading amplitude of the beam-charge asymmetry is substantial at large -t, but becomes small at small values of -t. The amplitudes of the beam-helicity asymmetry that are sensitive to the squared DVCS term are found to be consistent with zero. The deuteron Compton form factor H 1 appears to have a similar behavior as H of the proton. (orig.)

Signals for transversity and transverse-momentum-dependent quark distribution functions studied at the HERMES experiment

Energy Technology Data Exchange (ETDEWEB)

Diefenthaler, Markus

2010-08-15

Intention of the present thesis was the study of transverse-momentum dependent quark distribution functions. In the focus stood the Fourier analysis of azimutal single-spin asymmetries of pions and charged kaons performed within the HERMES experiment. These asymmetries were reconstructed from deep-inelastic scattering events on a transversely polarized proton target and decomposed in Fourier components. In the framework of quantum chromodynamics such components can be interpreted as folding of quark distribution and fragmentation functions. By the analysis of the transverse-momentum dependent quark distribution functions the study of spin-orbit correlations in the internal of the nucleon was made possible. By this conclusions on the orbital angular momentum of the quarks can be drawn. The extracted Fourier components extend the hitherto available informations on the transverse-momentum dependent quark distribution functions remarkably. The presented Fourier analysis made not only a detection of the Collins and Sivers effects possible, but beyond the extraction of the signals of the pretzelosity and worm-gear distributions. The so obtained results will conclusively contribute to the understanding of future measurements in this field and furthermore make possible a test of fundamental predictions of quantum chromodynamics.

Measurement of the strange quark contribution to the proton spin using neutral kaons at HERMES

Energy Technology Data Exchange (ETDEWEB)

Lu, Shaojun

2007-03-15

This thesis reports a new ''isoscalar'' measurement of {delta}s + {delta} anti s. Because strange quarks carry no isospin, the strange seas in the proton and neutron are identical. In the deuteron, an isoscalar target, the fragmentation process in DIS can be described without any assumptions regarding isospin dependent fragmentation. In the isoscalar extraction of {delta}s + {delta} anti s only the spin asymmetry for K{sup 0}{sub s} A{sup K{sup 0}{sub s1,d}} (x,Q{sup 2}, z) and the inclusive asymmetry A{sub 1,d}(x,Q{sup 2}) are used. An accurate measurement of the total non-strange quark polarisation {delta}Q = {delta}u + {delta} anti u + {delta}d + {delta} anti d comes directly from A{sub 1,d}(x,Q{sup 2}). The fragmentation functions needed for a leading order (LO) extraction of {delta}S = {delta}s + {delta} anti s are measured directly at HERMES kinematics using the same data. As a result of this analysis, the helicity densities for the strange quarks are consistent with zero with the experimental uncertainty over the measured x kinematic range. (orig.)

Deeply Virtual Compton Scattering off a deuterium target at the HERMES experiment

Energy Technology Data Exchange (ETDEWEB)

Movsisyan, Aram

2011-05-15

Deeply virtual Compton scattering is studied in this report, using all data collected at the HERMES experiment from 1996 to 2005. Azimuthal asymmetries with respect to beam-helicity, beam-charge and target polarization alone and also to their different combinations for hard exclusive electroproduction of real photons in deep-inelastic scattering from a both unpolarized and longitudinally polarized deuterium targets are measured. The asymmetries are attributed to the interference between the deeply virtual Compton scattering and Bethe-Heitler processes. The asymmetries are observed in the exclusive region -(1.5){sup 2} GeV{sup 2}

GEOPROCESSAMENTO APLICADO AO DIAGNÓSTICO DE USO E COBERTURA DA TERRA NA MICROBACIA HIDROGRÁFICA DO CÓRREGO HERMES - RONDÔNIA

Directory of Open Access Journals (Sweden)

Joiada Moreira da Silva Linhares

2014-01-01

Full Text Available A microbacia hidrográfica do córrego Hermes, inserida no cone-sul de Rondônia, vem enfrentando severas implicações ambientais relacionadas às mudanças do uso da terra, tais como a conversão da floresta em áreas de lavouras e pastagens para criação extensiva de gado. Tais alterações são devidas, em um primeiro momento, à consolidação de um Programa de Integração Nacional – PIN, através da implantação do projeto de Colonização Paulo Assis Ribeiro, e mais recentemente vem sendo ampliadas por uma nova dinâmica econômica ligada ao mercado de exportação de alta rentabilidade, a agroindústria. O objetivo deste estudo foi avaliar as causas e consequências das mudanças do uso e cobertura da terra na microbacia hidrográfica do córrego Hermes, através da aplicação de método espacial e não espacial de geoprocessamento. Os resultados analíticos de métricas de paisagem indicam que 82,76% da área correspondem a uma matriz de pastagem de gramíneas, e que 14,64% reportam-se a cobertura vegetal nativa seccionada em 18 fragmentos pouco inter-relacionados, havendo ainda 1,94% e 0,66% relativos à agricultura (lavoura perene e anual e áreas edificadas, respectivamente. Depreende-se, por fim, que o intenso desflorestamento, com fins de aumento de áreas destinadas às atividades de agropecuária, é a principal causa da devastação da floresta de transição na MBCH-RO, emanando desta outras formas de degradação ambiental, como erosão, assoreamento dos cursos de água perenes, aumento da carga de partículas em suspensão e dissolvidas, e, por fim, modificação dos ciclos hidrológicos e de carbono em escalas local, regional e global.

HERMES: A Model to Describe Deformation, Burning, Explosion, and Detonation

Energy Technology Data Exchange (ETDEWEB)

Reaugh, J E

2011-11-22

HERMES (High Explosive Response to MEchanical Stimulus) was developed to fill the need for a model to describe an explosive response of the type described as BVR (Burn to Violent Response) or HEVR (High Explosive Violent Response). Characteristically this response leaves a substantial amount of explosive unconsumed, the time to reaction is long, and the peak pressure developed is low. In contrast, detonations characteristically consume all explosive present, the time to reaction is short, and peak pressures are high. However, most of the previous models to describe explosive response were models for detonation. The earliest models to describe the response of explosives to mechanical stimulus in computer simulations were applied to intentional detonation (performance) of nearly ideal explosives. In this case, an ideal explosive is one with a vanishingly small reaction zone. A detonation is supersonic with respect to the undetonated explosive (reactant). The reactant cannot respond to the pressure of the detonation before the detonation front arrives, so the precise compressibility of the reactant does not matter. Further, the mesh sizes that were practical for the computer resources then available were large with respect to the reaction zone. As a result, methods then used to model detonations, known as {beta}-burn or program burn, were not intended to resolve the structure of the reaction zone. Instead, these methods spread the detonation front over a few finite-difference zones, in the same spirit that artificial viscosity is used to spread the shock front in inert materials over a few finite-difference zones. These methods are still widely used when the structure of the reaction zone and the build-up to detonation are unimportant. Later detonation models resolved the reaction zone. These models were applied both to performance, particularly as it is affected by the size of the charge, and to situations in which the stimulus was less than that needed for reliable

Measurement of transverse single-spin asymmetries in inclusive electroproduction at HERMES

International Nuclear Information System (INIS)

Lopez Ruiz, Alejandro

2012-12-01

This dissertation describes the measurement of two single-spin asymmetries (SSAs) in the production of particles from inelastic lepton-proton collisions. SSAs are a convenient observable for investigating the spin-dependent part of the electron-proton cross section. The analyzed data were taken by the HERMES experiment at DESY, using a 27.6 GeV electron/positron beam and a static hydrogen target in which the proton spin was polarized transversely to the direction of the beam. In the first case, SSAs were investigated in the inclusive electroproduction of charged pions and kaons. The asymmetries were studied as a function of the hadron momentum, p T , relative to the direction of the incident beam, and the Feynman variable x F . In the kinematic range 0.08 GeV T F T up to about 6% (8%) for pions (kaons) and then decrease again with increasing p T . For negative hadrons the asymmetries were of much smaller magnitude, sometimes positive and sometimes negative. When binned simultaneously in p T and x F , the asymmetries were found to be essentially independent of x F in each slice of p T . The analyzed data were manifestly dominated by hadrons from quasi-real photoproduction. In these reactions, the asymmetry can be related to the hadronic component of the photon and thus to the asymmetry A N observed in hadronic collisions at different energies but not yet fully understood. However, the largest contribution to the measured SSAs are from hadrons produced in deep-inelastic scattering (DIS) reactions, related to the Sivers function, which describes the asymmetric distribution of unpolarized quarks in a transversely polarized proton. Transverse SSAs were also measured in inclusive DIS, where only the scattered beam lepton is detected. In this case, non-zero SSAs would arise from two-photon exchange contributions to the electron-proton cross section. This observable is thus a check of the validity of the one-photon exchange approximation, commonly used in theoretical

Io, Argus, Hermes, Syrinx: An Example of the In_uence Excersiced by Ovid’s Metamorphoses on Ancient Roman Painting

Directory of Open Access Journals (Sweden)

Monika Osvald

2012-07-01

Full Text Available Although a main source of iconography ever since the Middle Ages, the influence of Ovid’s Metamorphoses on Ancient Roman visual arts has been presupposed rather than researched in detail. This lacuna in ancient iconography has been filled by the research project MetaMArS, Le Metamorfosi di Ovidio: Mito, Arte, Società, headed by Professor Francesca Ghedini of Padua University. The aim of the project is the systematic study of mutual influences between Ovid and the art of the Roman period. The research is based on a four-step methodology: (1 selecting the subject-matter and compiling an inventory of all literary and iconographic testimonies relating to it; (2 dividing Ovid’s narrative into episodes, i.e. acts and scenes; (3 classifying the iconographic repertoire by themes and schemes; (4 identifying the convergences/ divergences between the two parallel series. Following the above methodology, the paper focuses on the myth of Io woven by Ovid into Book 1 of the Metamorphoses (ll. 568–750. The lines have been divided into a prologue and five acts, with each of the latter subdivided into two scenes, while Act 4 subsumes the passage on Pan and Syrinx as well. In the opinion of Franz Bömer, it is the Syrinx element that is Ovid’s original contribution: thus both the Syrinx figure and the entire first scene of Act 4, which has Hermes in a shepherd’s attire beguile Argus by playing a new instrument, are crucial to establishing a potential in_uence of the Metamorphoses on select Roman iconography. The iconographic theme of Io, Argus, and Hermes is represented in Roman wall painting by eleven pictures, which may be divided into bi-figural and three-figural depictions, with the former corresponding to Act 3, Scene 1, and the latter to Act 4, Scene 1. In terms of composition, the images follow four schemes, the second of which includes two variants. Schemes 3 (in the House of the Citharist at Pompeii and 4 (in the temple of Isis at Pompeii

Measures of star formation rates from infrared (Herschel) and UV (GALEX) emissions of galaxies in the HerMES fields

Science.gov (United States)

Buat, V.; Giovannoli, E.; Burgarella, D.; Altieri, B.; Amblard, A.; Arumugam, V.; Aussel, H.; Babbedge, T.; Blain, A.; Bock, J.; Boselli, A.; Castro-Rodríguez, N.; Cava, A.; Chanial, P.; Clements, D. L.; Conley, A.; Conversi, L.; Cooray, A.; Dowell, C. D.; Dwek, E.; Eales, S.; Elbaz, D.; Fox, M.; Franceschini, A.; Gear, W.; Glenn, J.; Griffin, M.; Halpern, M.; Hatziminaoglou, E.; Heinis, S.; Ibar, E.; Isaak, K.; Ivison, R. J.; Lagache, G.; Levenson, L.; Lonsdale, C. J.; Lu, N.; Madden, S.; Maffei, B.; Magdis, G.; Mainetti, G.; Marchetti, L.; Morrison, G. E.; Nguyen, H. T.; O'Halloran, B.; Oliver, S. J.; Omont, A.; Owen, F. N.; Page, M. J.; Pannella, M.; Panuzzo, P.; Papageorgiou, A.; Pearson, C. P.; Pérez-Fournon, I.; Pohlen, M.; Rigopoulou, D.; Rizzo, D.; Roseboom, I. G.; Rowan-Robinson, M.; Sánchez Portal, M.; Schulz, B.; Seymour, N.; Shupe, D. L.; Smith, A. J.; Stevens, J. A.; Strazzullo, V.; Symeonidis, M.; Trichas, M.; Tugwell, K. E.; Vaccari, M.; Valiante, E.; Valtchanov, I.; Vigroux, L.; Wang, L.; Ward, R.; Wright, G.; Xu, C. K.; Zemcov, M.

2010-11-01

The reliability of infrared (IR) and ultraviolet (UV) emissions to measure star formation rates (SFRs) in galaxies is investigated for a large sample of galaxies observed with the Spectral and Photometric Imaging Receiver (SPIRE) and the Photodetector Array Camera and Spectrometer (PACS) instruments on Herschel as part of the Herschel Multi-Tiered Extragalactic Survey (HerMES) project. We build flux-limited 250-μm samples of sources at redshift z 500 μm. Dust attenuation is discussed on the basis of commonly used diagnostics: the LIR/LUV ratio and the slope, β, of the UV continuum. A mean dust attenuation AUV of mag is measured in the samples. LIR/LUV is found to correlate with LIR. Galaxies with and 0.5 recipe commonly applied to local starbursts is found to overestimate the dust attenuation correction in our galaxy sample by a factor of ~2-3. The SFRs deduced from LIR are found to account for about 90 per cent of the total SFR; this percentage drops to 71 per cent for galaxies with (or ). For these faint objects, one needs to combine UV and IR emissions to obtain an accurate measure of the SFR.

THE PROTECTED SPECIES OF LEPIDOPTERA IN THE LANDSCAPE RESERVE ‘ZVANETS’ (BELARUS)

OpenAIRE

Kulak, A. V.; Yakovlev, R. V.

2015-01-01

The article contains the data on distribution, population, habitats and phenology of 16 species of lepidopteran insects (Insecta: Lepidoptera), inhabiting the landscape reserve “Zvanets” (Belarus, Brest region) and listed in the Red Book of the Republic of Belarus: Rhyparioides metelkana, Pericallia matronula, Callimorpha dominula, Arytrura musculus, Diachrysia zosimi, Chariaspilates formosaria, Scopula caricaria, Gagitodes sagittata, Lycaena dispar, Euphydryas aurinia, Eu. maturna, Melitaea ...

L’empathie comme outil herméneutique du soi: Note sur Paul Ricœur et Heinz Kohut

Directory of Open Access Journals (Sweden)

Michel Dupuis

2011-01-01

Full Text Available Le bref texte que Paul Ricœur consacre en 1986 à la psychanalyse développée par Heinz Kohut révèle une réinterprétation phénoménologique à la fois du contenu et des fonctions de l'empathie, au total considérée comme un véritable outil à l'œuvre dans l'herméneutique du soi. La vision kohutienne de la constitution du soi et du processus thérapeutique analytique produit une espèce de “dé-sentimentalisation” de l'empathie, en soulignant le rôle crucial du transfert intersubjectif, fort à distance de la théorie (freudienne solipsiste de l'ego.The short text published in 1986 by Paul Ricoeur about Heinz Kohut's psychoanalysis of the self reveals a phenomenological reinterpretation of the content and the functions of empathy, finally considered as an effective tool of the hermeneutics of the self. Kohut's model of constitution of the self and of the therapeutic analytical process produces a kind of “de-sentimentalization” of empathy, pointing to the crucial role of intersubjective transfer, far from a (Freudian solipsistic theory of the ego.

Measurement of transverse single-spin asymmetries in inclusive electroproduction at HERMES

Energy Technology Data Exchange (ETDEWEB)

Lopez Ruiz, Alejandro

2012-12-15

This dissertation describes the measurement of two single-spin asymmetries (SSAs) in the production of particles from inelastic lepton-proton collisions. SSAs are a convenient observable for investigating the spin-dependent part of the electron-proton cross section. The analyzed data were taken by the HERMES experiment at DESY, using a 27.6 GeV electron/positron beam and a static hydrogen target in which the proton spin was polarized transversely to the direction of the beam. In the first case, SSAs were investigated in the inclusive electroproduction of charged pions and kaons. The asymmetries were studied as a function of the hadron momentum, p{sub T}, relative to the direction of the incident beam, and the Feynman variable x{sub F}. In the kinematic range 0.08 GeV

Reconfiguration of NASA GRC's Vacuum Facility 6 for Testing of Advanced Electric Propulsion System (AEPS) Hardware

Science.gov (United States)

Peterson, Peter Y.; Kamhawi, Hani; Huang, Wensheng; Yim, John T.; Haag, Thomas W.; Mackey, Jonathan A.; McVetta, Michael S.; Sorrelle, Luke T.; Tomsik, Thomas M.; Gilligan, Ryan P.;

Energy Tax versus Carbon Tax. A quantitative macro economical analysis with the HERMES/MIDAS models

International Nuclear Information System (INIS)

Karadeloglou, P.

1992-01-01

The idea of imposing a tax has been recently put forward as a policy-instrument to induce substitutions aiming at reducing CO[sub 2] overall emissions. One can distinguish two options: recycle tax revenues for energy system restructuring (supply or demand restructuring); or use the corresponding revenues in order to reduce the negative impacts caused on the economic activity by the introduction of the tax. Several papers dealing with only the macroeconomic aspects of the environmental problems have been written. These papers neglect more or less the energy sphere and consider that the energy feedback effects are very small. Macroeconomic impacts of the carbon tax have been examined for the United Kingdom and for the four big European countries elsewhere. In this paper a synthesis of both the energy and the macroeconomic approaches is realized. The approach adopted is global and tries to evaluate the impacts on both the economic and energy system. The main question examined is the effectiveness and impacts of fiscal policy on CO[sub 2] emission and the effects of the adoption of an accommodating policy. Thus, not only the effects of imposing an energy or carbon tax are examined, but also the effects of introducing accommodating measures are studied. The analysis is effected by using the HERMES-MIDAS linked system of models and is limited in analyzing the effects of carbon and energy taxes and the reduction of direct taxes and is effected for four countries namely France, Federal Republic of Germany, Italy and the United Kingdom. In section 2 policy scenarios are described while in sections three and four the results of the policy simulations are presented. In section five we compare the differences of two taxes (energy tax and carbon tax) and in section six the reduction of direct taxation as an accommodating measure is examined. 27 tabs., 10 refs

Energy Tax versus Carbon Tax. A quantitative macro economical analysis with the HERMES/MIDAS models

Energy Technology Data Exchange (ETDEWEB)

Karadeloglou, P. [National Technical University of Athens (Greece)

1992-03-01

The idea of imposing a tax has been recently put forward as a policy-instrument to induce substitutions aiming at reducing CO{sub 2} overall emissions. One can distinguish two options: recycle tax revenues for energy system restructuring (supply or demand restructuring); or use the corresponding revenues in order to reduce the negative impacts caused on the economic activity by the introduction of the tax. Several papers dealing with only the macroeconomic aspects of the environmental problems have been written. These papers neglect more or less the energy sphere and consider that the energy feedback effects are very small. Macroeconomic impacts of the carbon tax have been examined for the United Kingdom and for the four big European countries elsewhere. In this paper a synthesis of both the energy and the macroeconomic approaches is realized. The approach adopted is global and tries to evaluate the impacts on both the economic and energy system. The main question examined is the effectiveness and impacts of fiscal policy on CO{sub 2} emission and the effects of the adoption of an accommodating policy. Thus, not only the effects of imposing an energy or carbon tax are examined, but also the effects of introducing accommodating measures are studied. The analysis is effected by using the HERMES-MIDAS linked system of models and is limited in analyzing the effects of carbon and energy taxes and the reduction of direct taxes and is effected for four countries namely France, Federal Republic of Germany, Italy and the United Kingdom. In section 2 policy scenarios are described while in sections three and four the results of the policy simulations are presented. In section five we compare the differences of two taxes (energy tax and carbon tax) and in section six the reduction of direct taxation as an accommodating measure is examined. 27 tabs., 10 refs.

Contribution to the knowledge of butterfly fauna (Lepidoptera: Rhopalocera) of Zrmanja River region, Croatia: Prispevek k poznavanju metuljev (Lepidoptera: Rhopalocera) območja reke Zrmanje, Hrvaška:

OpenAIRE

Bjelić, Maja; Božinovska, Emilija; Burić, Ivona; Koren, Toni; Štih, Ana

2011-01-01

A total of 104 butterfly species were recorded in the wider surroundings of the river Zrmanja in Croatia between April and September of 2010. The region is exceptionally rich as this number represents 55% of all species recorded in Croatia. Euro-Siberian and Mediterranean species are prevailing. The known area of occurrence has been expanded for some interesting species: Hyponephele lupina (Costa, 1836), Lycaena thersamon (Esper, 1784), Polyommatus damon (Esper, 1785), Melitaea aurelia Nicker...

Fragmentation and nucleon structure in semi-inclusive deep-inelastic scattering at the HERMES experiment

Energy Technology Data Exchange (ETDEWEB)

Jossten, Sylvester Johannes

2013-10-15

Multiplicities for the semi-inclusive production of each charge state of {pi}{sup {+-}} and K{sup {+-}} mesons in deep-inelastic scattering are presented as a function of the kinematic quantities x, Q{sup 2}, z and P{sub h} {sub perpendicular} {sub to}. The multiplicities were extracted from data collected by the HERMES experiment at the HERA storage ring using 27.6 GeV electron and positron beams on a hydrogen or deuterium gas target. These results for identified hadrons constitute the most precise measurement to date, and will significantly enhance our understanding of the proton structure, as well as the fragmentation process in deep-inelastic scattering. Furthermore, the 3D binning at an unprecedented level of precision provides a handle to help disentangle the transverse momentum structure of both. The high level of precision coupled with an intermediate energy regime requires a careful study of the complex interaction between the experimental systematics, theoretical uncertainties, and the applicability of the factorization theorem within the standard framework of leading-twist collinear QCD. This is illustrated by the extraction of the valence quark ratio d{sub {nu}}/u{sub {nu}} at leading-order in {alpha}{sub s}. These results show a strong z-dependence below z {approx} 0.30, which could be interpreted as evidence for factorization breaking. This evidence weakens somewhat when isospin invariance of the fragmentation functions is assumed to be broken. Additionally, the multiplicities for the semi-inclusive production of {pi}{sup 0} mesons in deep-inelastic scattering are presented as a function of z. These multiplicities were extracted from the same data sample as used for the charged meson results. The neutral pion multiplicity is the same as the average charged pion multiplicity, up to z {approx} 0.70. This is consistent with isospin invariance below z {approx} 0.70. The results at high values of z show strong signs of isospin symmetry breaking.

Exclusive ρ0 meson cross section ratios on deuterium and hydrogen targets

International Nuclear Information System (INIS)

Osborne, A.G.S.

2006-06-01

The HERMES experiment is a large forward angle spectrometer located at the HERA accelerator ring at DESY, Hamburg. This thesis presents the analysis of the kinematic dependencies of ρ 0 vector meson production on hydrogen and deuterium targets. The relative gluon and quark contribution to the ρ 0 production amplitude is expected to depend on the kinematical variable x Bj , and by measuring the ratio of ρ 0 electroproduction cross sections on deuterium and hydrogen from HERMES data this dependence is confirmed. This thesis describes the methods used to extract the cross section ratio from the HERMES data taken between the years 1996 and 2000 and compares the results with the theoretical predictions. Until 2005 the missing mass resolution of the HERMES spectrometer was only sufficient to allow exclusivity at the level of a data sample. The HERMES Recoil Detector, installed in early 2006, is an upgrade which will augment the HERMES spectrometer by establishing exclusivity at the event level and therefore improving the resolution to which various kinematical variables may be reconstructed. Additionally, the Recoil Detector will contribute to the overall background suppression capability of the HERMES spectrometer. These improvements will provide a strong reduction in the statistical uncertainties present in the ρ 0 -analysis and other analyses at HERMES. The Recoil Detector critically relies on its track reconstruction software to enable its capability to provide event level exclusive measurements. This tracking code is presented in detail. (orig.)

Exclusive {rho}{sup 0} meson cross section ratios on deuterium and hydrogen targets

Energy Technology Data Exchange (ETDEWEB)

Osborne, A.G.S.

2006-08-15

The HERMES experiment is a large forward angle spectrometer located at the HERA accelerator ring at DESY, Hamburg. This thesis presents the analysis of the kinematic dependencies of {rho}{sup 0} vector meson production on hydrogen and deuterium targets. The relative gluon and quark contribution to the {rho}{sup 0} production amplitude is expected to depend on the kinematical variable x{sub Bj}, and by measuring the ratio of {rho}{sup 0} electroproduction cross sections on deuterium and hydrogen from HERMES data this dependence is confirmed. This thesis describes the methods used to extract the cross section ratio from the HERMES data taken between the years 1996 and 2000 and compares the results with the theoretical predictions. Until 2005 the missing mass resolution of the HERMES spectrometer was only sufficient to allow exclusivity at the level of a data sample. The HERMES Recoil Detector, installed in early 2006, is an upgrade which will augment the HERMES spectrometer by establishing exclusivity at the event level and therefore improving the resolution to which various kinematical variables may be reconstructed. Additionally, the Recoil Detector will contribute to the overall background suppression capability of the HERMES spectrometer. These improvements will provide a strong reduction in the statistical uncertainties present in the {rho}{sup 0}-analysis and other analyses at HERMES. The Recoil Detector critically relies on its track reconstruction software to enable its capability to provide event level exclusive measurements. This tracking code is presented in detail. (orig.)

Butterfly fauna of Ženeva pond near Niška Banja spa center (Lepidoptera: Papilionideae & Hesperioideae with some notes on endangered species

Directory of Open Access Journals (Sweden)

Nikolić, J.

2012-12-01

Full Text Available The article presents the results of research of butterfly species at Ženeva pond near the river Nišava (SE Serbia. In all, the total of 45 species was recorded, representing 23% of Serbian butterfly fauna. Among species recorded, 4 are listed in Red data book of Serbian butterflies and are declared strictly protected in the country, while two are listed in European red list of butterfly and listed in Annex IV of the EU Habitats Directive, namely Lycaena dispar and Zerynthia polyxena.

Polarization, motion, and fragmentation. Exploring the role of quarks in the nucleon through semi-inclusive longitudinal spin asymmetries at HERMES

International Nuclear Information System (INIS)

Rubin, Joshua George

2009-11-01

The motivation for this work was to improve upon prior analyses that extracted the quark helicity distributions, Δ(x), of the proton. Chapter 4 contains several new double-spin asymmetries which are results in their own right. The ph? dependence is plotted for the first time with HERMES data which is uniquely hadron separated. The hadron charge difference asymmetry is presented which, in combination with the quark helicity densities can put limits on fragmentation symmetry breaking in semi-inclusive DIS. Additionally, a novel method of unfolding yields (reducing smearing effects from detector resolution limitations and QED radiation) was developed and presented here for the first time which potentially allows new kinds of asymmetries to be constructed which were unavailable before. Also, this chapter describes the method by which the first ever three dimensionally binned SIDIS double-spin asymmetries were produced. These asymmetries, which will be used as the data inputs for the Δ(x) extraction, are valuable inputs to world fits being performed by theorists. Chapter 5 further explores this idea of fragmentation symmetry breaking with Monte Carlo studies of fragmentation functions. These studies test assumptions which are frequently made in the interpretation of asymmetries like the hadron charge difference of the prior chapter and suggest that these assumptions should be approached with some caution. Also, a technique for tuning and more importantly propagating systematic uncertainty through non-analytic Monte Carlo models, like the Lund-String model which provides an essential input to the Δ(x) extraction, is developed (orig.)

Polarization, motion, and fragmentation. Exploring the role of quarks in the nucleon through semi-inclusive longitudinal spin asymmetries at HERMES

Energy Technology Data Exchange (ETDEWEB)

Rubin, Joshua George

2009-11-15

The motivation for this work was to improve upon prior analyses that extracted the quark helicity distributions, {delta}(x), of the proton. Chapter 4 contains several new double-spin asymmetries which are results in their own right. The ph? dependence is plotted for the first time with HERMES data which is uniquely hadron separated. The hadron charge difference asymmetry is presented which, in combination with the quark helicity densities can put limits on fragmentation symmetry breaking in semi-inclusive DIS. Additionally, a novel method of unfolding yields (reducing smearing effects from detector resolution limitations and QED radiation) was developed and presented here for the first time which potentially allows new kinds of asymmetries to be constructed which were unavailable before. Also, this chapter describes the method by which the first ever three dimensionally binned SIDIS double-spin asymmetries were produced. These asymmetries, which will be used as the data inputs for the {delta}(x) extraction, are valuable inputs to world fits being performed by theorists. Chapter 5 further explores this idea of fragmentation symmetry breaking with Monte Carlo studies of fragmentation functions. These studies test assumptions which are frequently made in the interpretation of asymmetries like the hadron charge difference of the prior chapter and suggest that these assumptions should be approached with some caution. Also, a technique for tuning and more importantly propagating systematic uncertainty through non-analytic Monte Carlo models, like the Lund-String model which provides an essential input to the {delta}(x) extraction, is developed (orig.)

Hobo-like transposable elements as non-drosophilid gene vectors

International Nuclear Information System (INIS)

O'Brochta, D.A.; Warren, W.D.; Saville, K.J.; Whyard, S.; Mende, H.A.; Pinkerton, A.C.; Coates, C.J.; Atkinson, P.W.

1998-01-01

Using genetic and physical methods we discovered short-inverted repeat type transposable elements in non-drosophilid insects including, Bactorcera tryoni, Musca domestica, Musca vetustissima and Lucilia cuprina. These elements are related to hobo, Ac and Tam3. The Hermes element from M domestica is 2749 bp in length and has terminal inverted repeats and a transposase coding region very similar to those in hobo. Hermes is functional in M Domestic and can act as a gene vector in this species. When Hermes is introduced into D. melanogaster it is hyperactive, relative to existing vector systems used in this species. Hermes will be useful as a gene vector. (author)

O (Pós-positivismo e os propalados modelos de juiz (Hércules, Júpiter e Hermes - dois decálogos necessários

Directory of Open Access Journals (Sweden)

Lenio Luiz Streck

2010-02-01

Full Text Available Já virou lugar comum dizer que se é pós-positivista. Entretanto, pouco se sabe o que realmente seja o positivismo jurídico ( em suas várias facetas, confundindo esse movimento com a mera aplicação da litaralidade da lei. Nesse sentido, não se pode admitir argumentos que afastam o conteúdo de uma lei, democraticamente legitimada, com base numa suposta "superação" da literalidade do texto legal. Desse modo, para veificar o papel do intérprete do direito, faz-se necessária a desconstrução de uma tese que vem servindo de base para a caracterização dos modelos de direito e de juiz nos diversos sistemas jurídicos contemporâneos, os conhecidos juízes Hércules, Júpiter e Hermes (Ost, que tem levado a diversos e diferentes equívocos na teoria do direito. Uma reflexão crítica sobre a aplicação do direito não pode abrir mão dos pressupostos hermenêuticos que apontam para a superação dos "modelos" (solipsistas de juiz "criados" para "enfrentar" as agruras da indeterminabilidade dos textos jurídicos. Kelsen, Hart e Ross foram todos positivistas. Como positivistas são hoje os juristas que apostam em ativismos e na discricionariedade judicial...!

Carbon Back Sputter Modeling for Hall Thruster Testing

Science.gov (United States)

Gilland, James H.; Williams, George J.; Burt, Jonathan M.; Yim, John T.

2016-01-01

In support of wear testing for the Hall Effect Rocket with Magnetic Shielding (HERMeS) program, the back sputter from a Hall effect thruster plume has been modeled for the NASA Glenn Research Centers Vacuum Facility 5. The predicted wear at a near-worst case condition of 600 V, 12.5 kW was found to be on the order of 3 4 mkhour in a fully carbon-lined chamber. A more detailed numerical monte carlo code was also modified to estimate back sputter for a detailed facility and pumping configuration. This code demonstrated similar back sputter rate distributions, but is not yet accurately modeling the magnitudes. The modeling has been benchmarked to recent HERMeS wear testing, using multiple microbalance measurements. These recent measurements have yielded values, on the order of 1.5- 2 microns/khour.

Calibrating the metallicity of M dwarfs in wide physical binaries with F-, G-, and K- primaries - I: High-resolution spectroscopy with HERMES: stellar parameters, abundances, and kinematics

Science.gov (United States)

Montes, D.; González-Peinado, R.; Tabernero, H. M.; Caballero, J. A.; Marfil, E.; Alonso-Floriano, F. J.; Cortés-Contreras, M.; González Hernández, J. I.; Klutsch, A.; Moreno-Jódar, C.

2018-05-01

We investigated almost 500 stars distributed among 193 binary or multiple systems made of late-F, G-, or early-K primaries and late-K or M dwarf companion candidates. For all of them, we compiled or measured coordinates, J-band magnitudes, spectral types, distances, and proper motions. With these data, we established a sample of 192 physically bound systems. In parallel, we carried out observations with HERMES/Mercator and obtained high-resolution spectra for the 192 primaries and five secondaries. We used these spectra and the automatic STEPAR code for deriving precise stellar atmospheric parameters: Teff, log g, ξ, and chemical abundances for 13 atomic species, including [Fe/H]. After computing Galactocentric space velocities for all the primary stars, we performed a kinematic analysis and classified them in different Galactic populations and stellar kinematic groups of very different ages, which match our own metallicity determinations and isochronal age estimations. In particular, we identified three systems in the halo and 33 systems in the young Local Association, Ursa Major and Castor moving groups, and IC 2391 and Hyades Superclusters. We finally studied the exoplanet-metallicity relation in our 193 primaries and made a list 13 M-dwarf companions with very high metallicity that can be the targets of new dedicated exoplanet surveys. All in all, our dataset will be of great help for future works on the accurate determination of metallicity of M dwarfs.

Transverse-target single-spin azimuthal asymmetry in hard exclusive electroproduction of single pions at HERMES

International Nuclear Information System (INIS)

Hristova, I.

2007-12-01

We present the analysis of data taken in the years 2002-2004 with the 27.56 GeV positron beam of the HERA storage ring at DESY and the internal transversely polarised hydrogen fixed target of the HERMES experiment. Events with a scattered positron and a produced pion are selected. Exclusive production of single pions, e + p→e +' nπ + , is ensured by requiring the missing mass in the event to be equal to the mass of the neutron, which is not detected. The cross section for this process depends on the Bjorken scaling variable, the four-momentum transfer, and the transverse four-momentum transfer, whose average values for our sample are left angle x right angle =0.12, left angle Q 2 right angle =2.3 GeV 2 , left angle t' right angle =-0.18 GeV 2 , respectively, and two azimuthal angles: the angle φ between the scattering and production planes (their common line contains the virtual photon), and the angle φ S between the scattering plane and the target polarisation vector. The hard scattering is selected by requiring Q 2 >1 GeV 2 . The asymmetry, also called transverse-target single-spin azimuthal asymmetry, is defined as the ratio of the difference to the sum of the cross sections for positive and negative target polarisation. It is characterised by six azimuthal sine modulations, whose amplitudes can vary from -1 to 1. We measure the asymmetry from a sample of 2093 events with a signal-to-background ratio of 1: 1. At average kinematics, the values of the amplitudes are found to be small or consistent with zero, except for the amplitude A sinφ S UT,meas =0.38±0.06(stat) +0.12 -0.06 (syst). The amplitude of main interest for comparison with theory, A sin(φ-φ S ) UT,meas =0.09±0.05(stat) +0.10 -0.03 (syst), after correction for the background contribution becomes A sin(φ-φ S ) UT,bg.cor =0.22 ±0.13(stat) +0.10 -0.04 (syst). As a function of t', the measured values of this amplitude increase as √(-t') and at larger vertical stroke t' vertical stroke the

Beam-helicity and beam-charge asymmetries associated with deeply virtual Compton scattering on the unpolarised proton

Energy Technology Data Exchange (ETDEWEB)

Airapetian, A. [Giessen Univ. (Germany). Physikalisches Inst.; Michigan Univ., Ann Arbor, MI (United States). Randall Laboratory of Physics; Akopov, N. [Yerevan Physics Institute (Armenia); Akopov, Z. [DESY Hamburg (DE)] (and others)

2012-03-15

Beam-helicity and beam-charge asymmetries in the hard exclusive leptoproduction of real photons from an unpolarised hydrogen target by a 27.6 GeV lepton beam are extracted from the HERMES data set of 2006-2007 using a missing-mass event selection technique. The asymmetry amplitudes extracted from this data set are more precise than those extracted from the earlier data set of 1996-2005 previously analysed in the same manner by HERMES. The results from the two data sets are compatible with each other. Results from these combined data sets are extracted and constitute the most precise asymmetry amplitude measurements made in the HERMES kinematic region using a missing-mass event selection technique. (orig.)

Biokeemilised kõnelused katseklaasis / Laura Herm ; Herm, Laura; Rinken, Ago

Index Scriptorium Estoniae

Herm, Laura

2007-01-01

Artiklis räägitakse suhtlemise biokeemiast, sellistest biokeemilistest kõnelustest, mida peavad meid moodustavad närvirakud omavahel ja iseeneste sees, ning mida oma katseklaasides uurivad Tartu Ülikooli keemia instituudi bioorgaanilise keemia õppetooli õppurid ja teadurid

Facility Effect Characterization Test of NASA's HERMeS Hall Thruster

Science.gov (United States)

Huang, Wensheng; Kamhawi, Hani; Haag, Thomas W.; Ortega, Alejandro Lopez; Mikellides, Ioannis G.

2016-01-01

A test to characterize the effect of varying background pressure on NASA's 12.5-kW Hall Effect Rocket with Magnetic Shielding had being completed. This thruster is the baseline propulsion system for the Solar Electric Propulsion Technology Demonstration Mission (SEP TDM). Potential differences in thruster performance and oscillation characteristics when in ground facilities versus on-orbit are considered a primary risk for the propulsion system of the Asteroid Redirect Robotic Mission, which is a candidate for SEP TDM. The first primary objective of this test was to demonstrate that the tools being developed to predict the zero-background-pressure behavior of the thruster can provide self-consistent results. The second primary objective of this test was to provide data for refining a physics-based model of the thruster plume that will be used in spacecraft interaction studies. Diagnostics deployed included a thrust stand, Faraday probe, Langmuir probe, retarding potential analyzer, Wien filter spectrometer, and high-speed camera. From the data, a physics-based plume model was refined. Comparisons of empirical data to modeling results are shown.

HerMES: dust attenuation and star formation activity in ultraviolet-selected samples from z˜ 4 to ˜ 1.5

Science.gov (United States)

Heinis, S.; Buat, V.; Béthermin, M.; Bock, J.; Burgarella, D.; Conley, A.; Cooray, A.; Farrah, D.; Ilbert, O.; Magdis, G.; Marsden, G.; Oliver, S. J.; Rigopoulou, D.; Roehlly, Y.; Schulz, B.; Symeonidis, M.; Viero, M.; Xu, C. K.; Zemcov, M.

2014-01-01

We study the link between observed ultraviolet (UV) luminosity, stellar mass and dust attenuation within rest-frame UV-selected samples at z ˜ 4, ˜ 3 and ˜1.5. We measure by stacking at 250, 350 and 500 μm in the Herschel/Spectral and Photometric Imaging Receiver images from the Herschel Multi-Tiered Extragalactic Survey (HerMES) program the average infrared luminosity as a function of stellar mass and UV luminosity. We find that dust attenuation is mostly correlated with stellar mass. There is also a secondary dependence with UV luminosity: at a given UV luminosity, dust attenuation increases with stellar mass, while at a given stellar mass it decreases with UV luminosity. We provide new empirical recipes to correct for dust attenuation given the observed UV luminosity and the stellar mass. Our results also enable us to put new constraints on the average relation between star formation rate (SFR) and stellar mass at z ˜ 4, ˜3 and ˜1.5. The SFR-stellar mass relations are well described by power laws (SFR∝ M_*^{0.7}), with the amplitudes being similar at z ˜ 4 and ˜3, and decreasing by a factor of 4 at z ˜ 1.5 at a given stellar mass. We further investigate the evolution with redshift of the specific SFR. Our results are in the upper range of previous measurements, in particular at z ˜ 3, and are consistent with a plateau at 3 < z < 4. Current model predictions (either analytic, semi-analytic or hydrodynamic) are inconsistent with these values, as they yield lower predictions than the observations in the redshift range we explore. We use these results to discuss the star formation histories of galaxies in the framework of the main sequence of star-forming galaxies. Our results suggest that galaxies at high redshift (2.5 < z < 4) stay around 1 Gyr on the main sequence. With decreasing redshift, this time increases such that z = 1 main-sequence galaxies with 108

Transverse-target single-spin azimuthal asymmetry in hard exclusive electroproduction of single pions at HERMES

Energy Technology Data Exchange (ETDEWEB)

Hristova, I.

2007-12-15

We present the analysis of data taken in the years 2002-2004 with the 27.56 GeV positron beam of the HERA storage ring at DESY and the internal transversely polarised hydrogen fixed target of the HERMES experiment. Events with a scattered positron and a produced pion are selected. Exclusive production of single pions, e{sup +}p{yields}e{sup +'}n{pi}{sup +}, is ensured by requiring the missing mass in the event to be equal to the mass of the neutron, which is not detected. The cross section for this process depends on the Bjorken scaling variable, the four-momentum transfer, and the transverse four-momentum transfer, whose average values for our sample are left angle x right angle =0.12, left angle Q{sup 2} right angle =2.3 GeV{sup 2}, left angle t' right angle =-0.18 GeV{sup 2}, respectively, and two azimuthal angles: the angle {phi} between the scattering and production planes (their common line contains the virtual photon), and the angle {phi}{sub S} between the scattering plane and the target polarisation vector. The hard scattering is selected by requiring Q{sup 2}>1 GeV{sup 2}. The asymmetry, also called transverse-target single-spin azimuthal asymmetry, is defined as the ratio of the difference to the sum of the cross sections for positive and negative target polarisation. It is characterised by six azimuthal sine modulations, whose amplitudes can vary from -1 to 1. We measure the asymmetry from a sample of 2093 events with a signal-to-background ratio of 1: 1. At average kinematics, the values of the amplitudes are found to be small or consistent with zero, except for the amplitude A{sup sin{phi}{sub SUT,meas}}=0.38{+-}0.06(stat){sup +0.12}{sub -0.06}(syst). The amplitude of main interest for comparison with theory, A{sup sin({phi}-{phi}{sub S})}{sub UT,meas}=0.09{+-}0.05(stat){sup +0.10}{sub -0.03}(syst), after correction for the background contribution becomes A{sup sin({phi}-{phi}{sub S})}{sub UT,bg.cor}=0.22 {+-}0.13(stat){sup +0.10}{sub -0

Near-Surface Plasma Characterization of the 12.5-kW NASA TDU1 Hall Thruster

Science.gov (United States)

Shastry, Rohit; Huang, Wensheng; Kamhawi, Hani

2015-01-01

To advance the state-of-the-art in Hall thruster technology, NASA is developing a 12.5-kW, high-specific-impulse, high-throughput thruster for the Solar Electric Propulsion Technology Demonstration Mission. In order to meet the demanding lifetime requirements of potential missions such as the Asteroid Redirect Robotic Mission, magnetic shielding was incorporated into the thruster design. Two units of the resulting thruster, called the Hall Effect Rocket with Magnetic Shielding (HERMeS), were fabricated and are presently being characterized. The first of these units, designated the Technology Development Unit 1 (TDU1), has undergone extensive performance and thermal characterization at NASA Glenn Research Center. A preliminary lifetime assessment was conducted by characterizing the degree of magnetic shielding within the thruster. This characterization was accomplished by placing eight flush-mounted Langmuir probes within each discharge channel wall and measuring the local plasma potential and electron temperature at various axial locations. Measured properties indicate a high degree of magnetic shielding across the throttle table, with plasma potential variations along each channel wall being less than or equal to 5 eV and electron temperatures being maintained at less than or equal to 5 eV, even at 800 V discharge voltage near the thruster exit plane. These properties indicate that ion impact energies within the HERMeS will not exceed 26 eV, which is below the expected sputtering threshold energy for boron nitride. Parametric studies that varied the facility backpressure and magnetic field strength at 300 V, 9.4 kW, illustrate that the plasma potential and electron temperature are insensitive to these parameters, with shielding being maintained at facility pressures 3X higher and magnetic field strengths 2.5X higher than nominal conditions. Overall, the preliminary lifetime assessment indicates a high degree of shielding within the HERMeS TDU1, effectively

Sivers asymmetries for inclusive pion and kaon production in deep-inelastic scattering

International Nuclear Information System (INIS)

Ellis, John; Hwang, Dae Sung; Kotzinian, Aram

2009-01-01

We calculate the Sivers distribution functions induced by the final-state interaction due to one-gluon exchange in diquark models of a nucleon structure, treating the cases of scalar and axial-vector diquarks with both dipole and Gaussian form factors. We use these distribution functions to calculate the Sivers single-spin asymmetries for inclusive pion and kaon production in deep-inelastic scattering. We compare our calculations with the results of HERMES and COMPASS, finding good agreement for π + production at HERMES, and qualitative agreement for π 0 and K + production. Our predictions for pion and kaon production at COMPASS could be probed with increased statistics. The successful comparison of our calculations with the HERMES data constitutes prima facie evidence that the quarks in the nucleon have some orbital angular momentum in the infinite-momentum frame.

Sivers Asymmetries for Inclusive Pion and Kaon Production in Deep-Inelastic Scattering

CERN Document Server

Ellis, Jonathan Richard; Kotzinian, Aram

2009-01-01

We calculate the Sivers distribution functions induced by the final-state interaction due to one-gluon exchange in diquark models of nucleon structure, treating the cases of scalar and axial-vector diquarks with both dipole and Gaussian form factors. We use these distribution functions to calculate the Sivers single-spin asymmetries for inclusive pion and kaon production in deep-inelastic scattering. We compare our calculations with the results of HERMES and COMPASS, finding good agreement for pi+ production at HERMES, and qualitative agreement for pi0 and K+ production. Our predictions for pion and kaon production at COMPASS could be probed with increased statistics. The successful comparison of our calculations with the HERMES data constitutes prima facie evidence that the quarks in the nucleon have some orbital angular momentum in the infinite-momentum frame.

Rwanda - eller hvor som helst

DEFF Research Database (Denmark)

Sonne, Charlotte Kærgaard; Weis, Rikke Lise

2010-01-01

Sundhedspersonalets rolle under konflikter er ofte et springende punkt, ikke mindst fordi intellektuelle og hermed også uddannet sundhedspersonale ikke sjældent er blandt ofrene i konflikten, som vi har set det med eksemplet i Rwanda.......Sundhedspersonalets rolle under konflikter er ofte et springende punkt, ikke mindst fordi intellektuelle og hermed også uddannet sundhedspersonale ikke sjældent er blandt ofrene i konflikten, som vi har set det med eksemplet i Rwanda....

Hall Thruster Thermal Modeling and Test Data Correlation

Science.gov (United States)

Myers, James

2016-01-01

HERMeS - Hall Effect Rocket with Magnetic Shielding. Developed through a joint effort by NASA/GRC and the Jet Propulsion Laboratory (JPL). Design goals: High power (12.5 kW) high Isp (3000 sec), high efficiency (> 60%), high throughput (10,000 kg), reduced plasma erosion and increased life (5 yrs) to support Asteroid Redirect Robotic Mission (ARRM). Further details see "Performance, Facility Pressure Effects and Stability Characterization Tests of NASAs HERMeS Thruster" by H. Kamhawi and team. Hall Thrusters (HT) inherently operate at elevated temperatures approx. 600 C (or more). Due to electric magnetic (E x B) fields used to ionize and accelerate propellant gas particles (i.e., plasma). Cooling is largely limited to radiation in vacuum environment.Thus the hardware components must withstand large start-up delta-T's. HT's are constructed of multiple materials; assorted metals, non-metals and ceramics for their required electrical and magnetic properties. To mitigate thermal stresses HT design must accommodate the differential thermal growth from a wide range of material Coef. of Thermal Expansion (CTEs). Prohibiting the use of some bolted/torqued interfaces.Commonly use spring loaded interfaces, particularly at the metal-to-ceramic interfaces to allow for slippage.However most component interfaces must also effectively conduct heat to the external surfaces for dissipation by radiation.Thus contact pressure and area are important.

Performance and Facility Background Pressure Characterization Tests of NASAs 12.5-kW Hall Effect Rocket with Magnetic Shielding Thruster

Science.gov (United States)

Kamhawi, Hani; Huang, Wensheng; Haag, Thomas; Shastry, Rohit; Thomas, Robert; Yim, John; Herman, Daniel; Williams, George; Myers, James; Hofer, Richard;

HSP70 expression in the copper butterfly Lycaena tityrus across altitudes and temperatures

DEFF Research Database (Denmark)

Karl, I.; Sørensen, Jesper Givskov; Loeschcke, Volker

2009-01-01

temperatures show differences in HSP70 expression. HSP70 expression increased substantially at the higher rearing temperature in low-altitude butterflies, which might represent an adaptation to occasionally occurring heat spells. On the other hand, high-altitude butterflies showed much less plasticity...... in response to rearing temperatures, and overall seem to rely more on genetically fixed thermal stress resistance. Whether the latter indicates a higher vulnerability of high-altitude populations to global warming needs further investigation. HSP70 expression increased with both colder and warmer induction......The ability to express heat-shock proteins (HSP) under thermal stress is an essential mechanism for ectotherms to cope with unfavourable conditions. In this study, we investigate if Copper butterflies originating from different altitudes and/or being exposed to different rearing and induction...

Transverse target-spin asymmetry associated with deeply virtual Compton scattering on the proton and a resulting model-dependent constraint on the total angular momentum of quarks in the nucleon

International Nuclear Information System (INIS)

Ye, Zhenyu

2007-02-01

In this thesis we report on the rst results on the transverse target-spin asymmetry associated with deeply virtual Compton scattering on the proton. It is shown that this asymmetry can provide one of the rare possibilities to access the Generalized Parton Distribution (GPD) E of the nucleon, and thus, through models for E, also to the total angular momentum of u and d quarks in the nucleon. The measurement was performed using the 27.6 GeV positron beam of the HERA storage ring and the transversely polarized hydrogen target of the HERMES experiment at DESY. The two leading azimuthal amplitudes of the asymmetry are extracted from the HERMES 2002-2004 data, corresponding to an integrated luminosity of 65.3 pb.1. By comparing the results obtained at HERMES and theoretical predictions based on a phenomenological model of GPDs, we obtain a model-dependent constraint on the total angular momentum of quarks in the nucleon. (orig.)

Transverse target-spin asymmetry associated with deeply virtual Compton scattering on the proton and a resulting model-dependent constraint on the total angular momentum of quarks in the nucleon

Energy Technology Data Exchange (ETDEWEB)

Ye, Zhenyu

2007-02-15

In this thesis we report on the rst results on the transverse target-spin asymmetry associated with deeply virtual Compton scattering on the proton. It is shown that this asymmetry can provide one of the rare possibilities to access the Generalized Parton Distribution (GPD) E of the nucleon, and thus, through models for E, also to the total angular momentum of u and d quarks in the nucleon. The measurement was performed using the 27.6 GeV positron beam of the HERA storage ring and the transversely polarized hydrogen target of the HERMES experiment at DESY. The two leading azimuthal amplitudes of the asymmetry are extracted from the HERMES 2002-2004 data, corresponding to an integrated luminosity of 65.3 pb.1. By comparing the results obtained at HERMES and theoretical predictions based on a phenomenological model of GPDs, we obtain a model-dependent constraint on the total angular momentum of quarks in the nucleon. (orig.)

Hermes Frank Chidam'modzi

African Journals Online (AJOL)

specifically analyse or discuss Plato's theories of education or justice. 93 .... the world, the unemployment capital of the world, the poverty continent, the Aids .... the masses would be empowered with the necessary civic and political rights.

An Examination of "The Martian" Trajectory

Science.gov (United States)

Burke, Laura

2015-01-01

This analysis was performed to support a request to examine the trajectory of the Hermes vehicle in the novel "The Martian" by Andy Weir. Weir developed his own tool to perform the analysis necessary to provide proper trajectory information for the novel. The Hermes vehicle is the interplanetary spacecraft that shuttles the crew to and from Mars. It is notionally a Nuclear powered vehicle utilizing VASIMR engines for propulsion. The intent of this analysis was the determine whether the trajectory as it was outlined in the novel is consistent with the rules of orbital mechanics.

Plasma Oscillation Characterization of NASA's HERMeS Hall Thruster via High Speed Imaging

Science.gov (United States)

Huang, Wensheng; Kamhawi, Hani; Haag, Thomas W.

2016-01-01

For missions beyond low Earth orbit, spacecraft size and mass can be dominated by onboard chemical propulsion systems and propellants that may constitute more than 50 percent of the spacecraft mass. This impact can be substantially reduced through the utilization of Solar Electric Propulsion (SEP) due to its substantially higher specific impulse. Studies performed for NASA's Human Exploration and Operations Mission Directorate and Science Mission Directorate have demonstrated that a 50kW-class SEP capability can be enabling for both near term and future architectures and science missions. A high-power SEP element is integral to the Evolvable Mars Campaign, which presents an approach to establish an affordable evolutionary human exploration architecture. To enable SEP missions at the power levels required for these applications, an in-space demonstration of an operational 50kW-class SEP spacecraft has been proposed as a SEP Technology Demonstration Mission (TDM). In 2010 NASA's Space Technology Mission Directorate (STMD) began developing high-power electric propulsion technologies. The maturation of these critical technologies has made mission concepts utilizing high-power SEP viable.

Hermes Tovar Pinzón. Los fantasmas de la memoria. Poder e inhibición en la historia de América Latina. Bogotá: Universidad de los Andes, 2009. 392 páginas

Directory of Open Access Journals (Sweden)

Renán Vega Cantor

2015-07-01

Full Text Available En 1976, Darío Jaramillo Agudelo acuñó el apelativo de nueva historia en un libro que compiló, que se convirtió en algo así como el manifiesto inaugural de lo que luego se llamaría, de manera cuasi oficial, La nueva historia de Colombia, y cuya producción más reconocida se plasmó en el libro mencionado, junto con el Manual de historia de Colombia en tres volúmenes, editado por Colcultura, y en Colombia hoy, un pequeño volumen publicado por la Editorial Siglo XXI, en 1978. En estos libros aparecen escritos de académicos que emergían o se autoproclamaban, en ese momento, como lo más novedoso e innovador de una investigación histórica que se pretendía independiente del bipartidismo e, incluso, crítica del capitalismo salvaje, a la colombiana. Los nombres más representativos, tal como aparecen en los libros mencionados, eran Jorge Orlando Melo, Álvaro Tirado Mejia, Salomón Kalmanovitz, Jesús Antonio Bejarano, Miguel Urrutia, Germán Colmenares y su mentor intelectual, Jaime Jaramillo Uribe. El nombre de Hermes Tovar Pinzón, un historiador de la misma generación, cuya producción intelectual ya era notable desde finales de la década de 1960, solo apareció en el libro editado por Darío Jaramillo, con un pequeño artículo sobre el “Modo de producción precolombino”.

Land-use changes, farm management and the decline of butterflies associated with semi-natural grasslands in southern Sweden

Directory of Open Access Journals (Sweden)

Sven G. Nilsson

2013-11-01

Full Text Available Currently, we are experiencing biodiversity loss on different spatial scales. One of the best studied taxonomic groups in decline is the butterflies. Here, we review evidence for such declines using five systematic studies from southern Sweden that compare old butterfly surveys with the current situation. Additionally, we provide data on butterfly and burnet moth extinctions in the region’s counties. In some local areas, half of the butterfly fauna has been lost during the last 60-100 years. In terms of extinctions, counties have lost 2-10 butterfly and burnet moth species. Land use has changed markedly with key butterfly habitats such as hay meadows disappearing at alarming rates. Grazed, mixed open woodlands have been transformed into dense coniferous forests and clear-cuts and domestic grazers have been relocated from woodlands to arable fields and semi-natural grasslands. Ley has increased rapidly and is used for bale silage repeatedly during the season. Overall, the changed and intensified land use has markedly reduced the availability of nectar resources in the landscape. Species that decline in Sweden are strongly decreasing or already extinct in other parts of Europe. Many typical grassland species that were numerous in former times have declined severely; among those Hesperia comma, Lycaena virgaureae, Lycaena hippothoe, Argynnis adippe, and Polyommatus semiargus. Also, species associated with open woodlands and wetlands such as, Colias palaeno, Boloria euphrosyne and the glade-inhabiting Leptidea sinapis have all decreased markedly. Current management practise and EU Common Agricultural Policy rules favour intensive grazing on the remaining semi-natural grasslands, with strong negative effects on butterfly diversity. Abandoned grasslands are very common in less productive areas of southern Sweden and these habitats may soon become forests. There is an urgent need for immediate action to preserve unfertilized, mown and lightly grazed

La métaphore entre sémantique et ontologie. La réception de la philosophie analytique du langage dans l'herméneutique de Paul Ricœur

Directory of Open Access Journals (Sweden)

Jean-Marc Tétaz

2014-07-01

Full Text Available  AbstractThe favourable reception of the analytic philosophy of language plays a central role in the composition of Ricœur’s literary hermeneutics. Following a brief description of the historical and methodological context of this reception, we show how Ricœur intends to link up phenomenology and analytic philosophy of language. Then we examine the role allocated to the analytic philosophy of language in establishing the idea of metaphor as a “more fundamental mode of reference” in The Rule of Metaphor. But once again Ricœur situates this semantic interpretation of metaphor within the context of an ontology. The result is methodological difficulties that mark the limits of Ricœur’s reception of the analytic philosophy of language.Keywords: Semantics, Metaphor, Ontology, Structuralism, Poetics.RésuméLa réception de la philosophie analytique du langage joue un rôle central dans la constitution de l’herméneutique littéraire de Ricœur. Après avoir tracé le cadre historique et systématique dans lequel s’inscrit cette réception, on montre comment Ricœur se propose d’articuler phénoménologie et philosophie analytique du langage. On étudie ensuite le rôle assigné à la philosophie analytique du langage pour la mise en place de la conception de la métaphore comme “mode plus fondamental de la référence” dans La métaphore vive. Mais Ricœur situe encore une fois cette interprétation sémantique de la métaphore dans un cadre ontologique. Il en résulte des difficultés systématiques qui marquent les limites de la réception de la philosophie analytique du langage par Ricœur.Mots-clés: Sémantique, Métaphore, Ontologie, Structuralisme, Poétique.

Ants use partner specific odors to learn to recognize a mutualistic partner.

Directory of Open Access Journals (Sweden)

Masaru K Hojo

Full Text Available Regulation via interspecific communication is an important for the maintenance of many mutualisms. However, mechanisms underlying the evolution of partner communication are poorly understood for many mutualisms. Here we show, in an ant-lycaenid butterfly mutualism, that attendant ants selectively learn to recognize and interact cooperatively with a partner. Workers of the ant Pristomyrmex punctatus learn to associate cuticular hydrocarbons of mutualistic Narathura japonica caterpillars with food rewards and, as a result, are more likely to tend the caterpillars. However, the workers do not learn to associate the cuticular hydrocarbons of caterpillars of a non-ant-associated lycaenid, Lycaena phlaeas, with artificial food rewards. Chemical analysis revealed cuticular hydrocarbon profiles of the mutualistic caterpillars were complex compared with those of non-ant-associated caterpillars. Our results suggest that partner-recognition based on partner-specific chemical signals and cognitive abilities of workers are important mechanisms underlying the evolution and maintenance of mutualism with ants.

Propagandistlik tellimustöö? / Marek Kallin

Index Scriptorium Estoniae

Kallin, Marek

2007-01-01

Rets. rmt.: Jeremy Rifkin. Euroopa unistus. OÜ Hermes, 2007. Artikli autor väljendab üllatust, et president Toomas Hendrik Ilves pidas vajalikuks osaleda intellektuaalselt nii pinnapealse teose esitlusel

Nedelja modõ v Parizhe

Index Scriptorium Estoniae

2004-01-01

Naistemoe nädal Pariisis näitab valmisriideid kevad-suveks 2005. Kollektsioonid John Gallianolt (Dior), Jean Paul Gaultier'lt (Hermes), Stefano Pilatilt (YSL Rive Gauche), Roberto Menichettilt (Celine)

77 FR 47043 - Draft 2012 Marine Mammal Stock Assessment Reports

Science.gov (United States)

2012-08-07

... dolphin, Oahu/Four Islands spinner dolphin, Kauai/Niihau spinner dolphin, Pearl and Hermes Reef spinner... dolphin (Hawaii Island, Oahu/Four Islands, and Kauai/ Niihau), Hawaii Pelagic false killer whale and...

[On gods, snakes and staffs--the emblem of the medical profession].

Science.gov (United States)

Rabinerson, David; Salzer, Liat; Gabbay-Benziv, Rinnat

2014-10-01

The commonly accepted emblems of the Medical Profession are the staff of the Greek god of medicine--Asklepios (or Asclepius], on which one serpent is entwined. Later, around the 16th century C.E., the wand of the herald of the Greek Gods, e.g., Hermes, on which two snakes are entwined and facing each other, became popular as the emblem of the medical profession. We elaborate on the history of the evolution of these emblems as symbols of medicine, including earlier influences from the times of the ancient Egyptians and Babylonians, which were followed by Judeo-Christian traditions and concepts. The relevance of the use of the wand of Hermes as an emblem of our profession is further discussed.

An experimental study on the two-phase natural circulation flow through the gap between reactor vessel and insulation under ERVC

Energy Technology Data Exchange (ETDEWEB)

Ha, Kwang-Soon; Park, Rae-Joon; Cho, Young-Ro; Kim, Sang-Baik; Kim, Hwan-Yeol; Kim, Hee-dong

2005-04-01

As part of a study on a two-phase natural circulation flow between the outer reactor vessel and the insulation material in the reactor cavity under an external reactor vessel cooling of APR1400, T-HERMES-SMALL and HERMES-HALF experiments have been performed. For the T-HERMES-SMALL experiments, an 1/21.6 scaled experimental facility was prepared utilizing the results of a scaling analysis to simulate the APR1400 reactor and insulation system. The liquid mass flow rates driven by natural circulation loop were measured by varying the wall heat flux, upper outlet area and configuration, and water head condition. The experimental data were also compared with numerical ones given by simple loop analysis. And non-heating small-scaled experiments have also been performed to certify the hydraulic similarity of the heating experiments by injecting air equivalent to the steam generated in the heating experimental condition. The HERMES-HALF experiment is a half-scaled / non-heating experimental study on the two-phase natural circulation through the annular gap between the reactor vessel and the insulation. The behaviors of the two-phase natural circulation flow in the insulation gap were observed, and the liquid mass flow rates driven by natural circulation loop were measured by varying the air injection rate, the coolant inlet area and configuration, and the outlet area and also the water head condition of coolant reservoir. From the experimental flow observation, the recirculation flows in the near region of the shear key were identified. At a higher air injection rate condition, higher recirculation flows and choking phenomenon in the near region of the shear key were observed. As the water inlet areas increased, the natural circulation mass flow rates asymptotically increased, that is, they converged at a specific value. And the experimental correlations for the natural circulation mass flow rates along with a variation of the inlet / outlet area and wall heat flux were

75 FR 46912 - Draft 2010 Marine Mammal Stock Assessment Reports

Science.gov (United States)

2010-08-04

..., Niihau stock, Kure-Midway stock, and the Pearl and Hermes stock. The SAR for the Hawaii stock of... new bottlenose dolphin stocks are the Kauai-Niihau stock, Oahu stock, Four Islands stock, and the...

La encrucijada en Pedro Páramo de Juan Rulfo / The Crossroads in Pedro Páramo by Juan Rulfo

Directory of Open Access Journals (Sweden)

Lilia Leticia García-Peña

2015-08-01

Full Text Available La obra de Juan Rulfo sintetiza la realidad del campo mexicano, captura el contorno de las identidades individuales y de la estructura de la interacción social del mundo que tanto le preocupó y del que es intérprete indiscutible, pero también supo convertir en materia narrativa aquellas atmósferas que rebasan el contexto mexicano y social. En este trabajo abordaré el tema de la encrucijada en el imaginario simbólico de Pedro Páramo (1955 como expresión de una reelaboración del mito de Hermes, analizaré cómo la novela de Juan Rulfo muestra estos ecos herméticos y qué sentido estético y sociocultural tiene esta resonancia mítica.

[Rod of Asclepius. Symbol of medicine].

Science.gov (United States)

Young, Pablo; Finn, Bárbara C; Bruetman, Julio E; Cesaro Gelos, Jorge; Trimarchi, Hernán

2013-09-01

Symbolism is one of the most archaic forms of human thoughts. Symbol derives from the Latin word symbolum, and the latter from the Greek symbolon or symballo, which means "I coincide, I make matches". The Medicine symbol represents a whole series of historical and ethical values. Asclepius Rod with one serpent entwined, has traditionally been the symbol of scientific medicine. In a misconception that has lasted 500 years, the Caduceus of Hermes, entwined by two serpents and with two wings, has been considered the symbol of Medicine. However, the Caduceus is the current symbol of Commerce. Asclepius Rod and the Caduceus of Hermes represent two professions, Medicine and Commerce that, in ethical practice, should not be mixed. Physicians should be aware of their real emblem, its historical origin and meaning.

Energy taxation in Southern Europe: The case of Portugal

International Nuclear Information System (INIS)

Modesto, L.

1993-01-01

It is investigated whether or not the imposition of a common EC energy tax will penalize more the poorer Southern European economies and if this will harm convergence at the EC level. The existing studies and empirical evidence are briefly surveyed. Then the results obtained when using the macroeconometric HERMES models to stimulate the introduction of an energy tax are exploited. The conclusions, however, have limited value, since the authors only have HERMES results for one Southern European economy: Portugal. Finally, the convergence in Europe and the effects of energy taxation on convergence are investigated. It is concluded that energy taxation will harm growth all over the EC, penalizing more one of the less developed countries (in this case Portugal), and having most probably adverse effects on convergence. 5 figs., 6 tabs., 22 refs

Unpolarised transverse momentum dependent distribution and fragmentation functions from SIDIS multiplicities

International Nuclear Information System (INIS)

Anselmino, M.; Boglione, M.; Gonzalez, H. J.O.; Melis, S.; Prokudin, A.

2014-01-01

In this study, the unpolarised transverse momentum dependent distribution and fragmentation functions are extracted from HERMES and COMPASS experimental measurements of SIDIS multiplicities for charged hadron production. The data are grouped into independent bins of the kinematical variables, in which the TMD factorisation is expected to hold. A simple factorised functional form of the TMDs is adopted, with a Gaussian dependence on the intrinsic transverse momentum, which turns out to be quite adequate in shape. HERMES data do not need any normalisation correction, while fits of the COMPASS data much improve with a y-dependent overall normalisation factor. A comparison of the extracted TMDs with previous EMC and JLab data confirms the adequacy of the simple gaussian distributions. The possible role of the TMD evolution is briefly considered

Hotol and Saenger are good political trump cards

Science.gov (United States)

Ruppe, Harry O.

Political and technological aspects of proposals for ESA reusable and/or SSTO launch vehicles (LVs) are examined in a critical review. The lack of reliable performance and cost estimates for such unconventional LV designs as Hotol, Saenger II, LART, ADV, and EARL is pointed out, and it is argued that progress toward the ESA goal of greater European space autonomy could be seriously endangered by abandoning or underfunding the current Ariane/Hermes LV program. The cost and reliability of expendable and reusable LV systems are discussed; two-stage and hybrid air-breathing engine concepts are compared; and the need for fundamental in-depth planning studies based on presently available technology or realistic projections is stressed. Long-term funding of such research at about 5 percent of present Ariane/Hermes levels is recommended.

Amplitude ratios in ρ0 leptoproductions and GPDs

Directory of Open Access Journals (Sweden)

Goloskokov S.V.

2017-01-01

Using the model results we calculate the ratio of different helicity amplitudes for a transversely polarized proton target to the leading twist longitudinal amplitude. Our results are close to the amplitude ratios measured by HERMES.

Disainikaart : Hispaania / Eve Arpo

Index Scriptorium Estoniae

Arpo, Eve

2009-01-01

Hispaania tuntumad arhitektid, disainerid, kunstnikud. Antoni Gaudí (1852-1926), Pablo Picasso (1881-1973), Félix Candela (1910-1997), Marti Guixe, Santiago Calatrava, Herme Ciscar, Monica Garcia, Roger Arquer, Patricia Urquiola, Jaime Hayón

Proposal to measure spin-structure functions and semi-exclusive asymmetries for the proton and neutron at HERA

International Nuclear Information System (INIS)

Jackson, H.E.; Hansen, J.O.; Jones, C.E.

1995-01-01

Nucleon spin physics will be studied in the HERMES experiment, that will use polarized internal targets of essentially pure atomic H, D, and 3 He in the HERA electron storage ring at DESY. A series of measurements of spin-dependent properties of the nucleon and few-body nuclei will be made; the spin structure function g 1 (x) of the proton and neutron will be measured to test the Bjorken sum rule and study the fraction of the nucleon spin carried by quarks; the spin structure function g 2 W, sensitive to quark-gluon correlations, and the structure functions b 1 (x), and Δ(x), sensitive to nuclear binding effects, will be measured; and, using the particle identification capability of the HERMES detector, pions will be detected in coincidence with the scattered electrons. The coincident hadron measurements represent the most important extension that can be made at this time to the existing measurements on the nucleon spin structure functions because they provide information about the flavor-dependence of the quark spin distribution in the nucleon. Argonne is providing the Cerenkov counter to be used for particle identification and developing the drifilm coating technique for the ultrathin target cell required for this experiment. The HERMES collaboration intends to use polarized targets with the highest available figures of merit, and the Argonne laser-driven source offers the most promise for a significant advance in present-day targets

Overview of high intensity x-ray and gamma-ray sources

International Nuclear Information System (INIS)

Prestwich, K.R.; Lee, J.R.; Ramirez, J.J.; Sanford, T.W.L.; Agee, F.J.; Frazier, G.B.; Miller, A.R.

1987-01-01

The requirements for intense x-ray and gamma-ray sources to simulate the radiation effects from nuclear weapons has led to the development of several types of terawatt-pulsed power systems. One example of a major gamma-ray source is Aurora, a 10-MV, 1.6-MA, 120-ns four-module, electron-beam generator. Recent requirements to improve the dose rate has led to the Aurora upgrade program and to the development of the 20-MV, 800-kA, 40-ns Hermes-III electron-beam accelerator. The Aurora program includes improvements to the pulsed power system and research on techniques to improve the pulse shape of the electron beam. Hermes III will feature twenty 1-MV, 800-kA induction accelerator cavities supplying energy to a magnetically insulated transmission line adder. Hermes III will become operational in 1988. Intense x-ray sources consist of pulsed power systems that operate with 1-MV to 2-MV output voltages and up to 25-TW output powers. These high powers are achieved with either low impedance electron-beam generators or multimodular pulsed power systems. The low-impedance generators have high voltage Marx generators that store the energy and then sequentially transfer this energy to pulse-forming transmission lines with lower and lower impedance until the high currents are reached. In the multimode machines, each module produces 0.7-TW to 4-TW output pulses, and all of the modules are connected together to supply energy to a single diode

Inductive voltage adder (IVA) for submillimeter radius electron beam

International Nuclear Information System (INIS)

Mazarakis, M.G.; Poukey, J.W.; Maenchen, J.E.

1996-01-01

The authors have already demonstrated the utility of inductive voltage adder accelerators for production of small-size electron beams. In this approach, the inductive voltage adder drives a magnetically immersed foilless diode to produce high-energy (10--20 MeV), high-brightness pencil electron beams. This concept was first demonstrated with the successful experiments which converted the linear induction accelerator RADLAC II into an IVA fitted with a small 1-cm radius cathode magnetically immersed foilless diode (RADLAC II/SMILE). They present here first validations of extending this idea to mm-scale electron beams using the SABRE and HERMES-III inductive voltage adders as test beds. The SABRE experiments are already completed and have produced 30-kA, 9-MeV electron beams with envelope diameter of 1.5-mm FWHM. The HERMES-III experiments are currently underway

Highly Enhanced Risk Management Emergency Satellite

DEFF Research Database (Denmark)

Dalmeir, Michael; Gataullin, Yunir; Indrajit, Agung

HERMES (Highly Enhanced Risk Management Emergency Satellite) is potential European satellite mission for global flood management, being implemented by Technical University Munich and European Space Agency. With its main instrument - a reliable and precise Synthetic Aperture Radar (SAR) antenna...

2005 EM300 and EM3002D Multibeam Sonar Data from Cruise Hi'ialakai HI-05-07 - Northwestern Hawaiian Islands

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — EM300 and EM3002D multibeam Data were collected from 08 August-01 October 2005 aboard NOAA Ship Hi'ialakai at Kure Atoll, Gambia Shoals, Pearl and Hermes Reef, west...

2005 EM300 and EM3002D Multibeam Sonar Data from Cruise Hi'ialakai HI-05-03 - Northwestern Hawaiian Islands

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — EM300 and EM3002D multibeam Data were collected in 14 May-7 June 2005 aboard NOAA Ship Hi'ialakai at French Frigate Shoals, Maro Reef, Pearl and Hermes Reef, Midway...

2006 EM300 and EM3002D Multibeam Sonar Data from Cruise Hi'ialakai HI-06-09 - Northwestern Hawaiian Islands and Main Hawaiian Islands

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — EM300 and EM3002D multibeam data were collected from 23 June to 20 July 2006 aboard NOAA Ship Hi'ialakai at Kure Atoll, Pearl and Hermes Atoll, Midway Island, and...

Koncernbegreber i regnskabs- og selskabsretten - et studium i koncernbegrebers tilblivelse og indhold med baggrund i samspillet mellem internationale regnskabsstandarder, EU-retten og national ret

DEFF Research Database (Denmark)

Sørensen, Anne Birgitte Søgaard

Siden 2005 har europæiske børsnoterede selskaber skullet aflægge koncernregnskaber efter IASB-organisationens regnskabsstandarder, og siden 2009-reformerne af henholdsvis årsregnskabsloven og selskabsloven har disse loves koncernbegreber skullet fortolkes i overensstemmelse hermed. Dette rejser en...

Plaadid / Immo Mihkelson

Index Scriptorium Estoniae

Mihkelson, Immo, 1959-

2003-01-01

Uutest plaatidest Adel Salameh "Kanza", Hermes House Band "The Album", David Holmes "Analyze That", Boston "Corporate America", Tim McGraw "And The Dancehall Doctors", Marti Pellow "Sings The Hits Of Wet Wet Wet & Smile", "Elvis Costello & The Imposters", Jolly Music "Jolly Bar"

Prügilill, vana hõng ja minimalism / Ene Läkk

Index Scriptorium Estoniae

Läkk, Ene, 1957-

2000-01-01

Kahest äärmusest praeguses aiakujunduses: minimalismist ja vanahõngulisest, hästi organiseeritud segadusest. Erinevatest materjalidest terrassist, "woodland'ist", moesolevatest prügitaimedest. Trendinäiteks Saksa saatkonna haljasalast Tallinnas (arhitekt R. Herms, teostus Ü. ja U. Grishakov). Soovitusi maastikuarhitekt Ü. Grishakovilt

78 FR 46319 - Polyethylene Retail Carrier Bags From Taiwan: Initiation of Anti-Circumvention Inquiry on...

Science.gov (United States)

2013-07-31

...). FOR FURTHER INFORMATION CONTACT: Hermes Pinilla, AD/CVD Operations, Import Administration... process at the place of manufacture and instead locating the final minor finishing operation in the United..., convenience, department, specialty retail, discount stores, and restaurants, to their customers to package and...

Koncernbegrebet

DEFF Research Database (Denmark)

Sørensen, Anne Birgitte Søgaard

Siden 2005 har europæiske børsnoterede selskaber skullet aflægge koncernregnskaber efter IASB-organisationens regnskabsstandarder, og siden 2009-reformerne af den danske årsregnskabslov og den danske selskabslov har disse loves koncernbegreber skullet fortolkes i overensstemmelse hermed. Bogen...

Beam-helicity asymmetry arising from deeply virtual Compton scattering measured with kinematically complete event reconstruction

International Nuclear Information System (INIS)

Airapetian, A.; Akopov, Z.

2012-06-01

The beam-helicity asymmetry in exclusive electroproduction of real photons by the longitudinally polarized HERA positron beam scattering off an unpolarized hydrogen target is measured at HERMES. The asymmetry arises from deeply virtual Compton scattering and its interference with the Bethe-Heitler process. Azimuthal amplitudes of the beam-helicity asymmetry are extracted from a data sample consisting of ep→epγ events with detection of all particles in the final state including the recoiling proton. The installation of a recoil detector, while reducing the acceptance of the experiment, allows the elimination of resonant background that was estimated to contribute an average of about 12% to the signal in previous HERMES publications. The removal of the resonant background from the present data sample is shown to increase the magnitude of the leading asymmetry amplitude by 0.054±0.016 to -0.328±0.027(stat.)±0.045(syst.).

Beam-helicity asymmetry arising from deeply virtual Compton scattering measured with kinematically complete event reconstruction

Energy Technology Data Exchange (ETDEWEB)

Airapetian, A. [Giessen Univ. (Germany). Physikalisches Inst.; Michigan Univ., Ann Arbor, MI (United States). Randall Lab. of Physics; Akopov, N. [Yerevan Physics Inst. (Armenia); Akopov, Z. [DESY, Hamburg (DE)] (and others)

2012-06-15

The beam-helicity asymmetry in exclusive electroproduction of real photons by the longitudinally polarized HERA positron beam scattering off an unpolarized hydrogen target is measured at HERMES. The asymmetry arises from deeply virtual Compton scattering and its interference with the Bethe-Heitler process. Azimuthal amplitudes of the beam-helicity asymmetry are extracted from a data sample consisting of ep{yields}ep{gamma} events with detection of all particles in the final state including the recoiling proton. The installation of a recoil detector, while reducing the acceptance of the experiment, allows the elimination of resonant background that was estimated to contribute an average of about 12% to the signal in previous HERMES publications. The removal of the resonant background from the present data sample is shown to increase the magnitude of the leading asymmetry amplitude by 0.054{+-}0.016 to -0.328{+-}0.027(stat.){+-}0.045(syst.).

Assessing the processing quality of different potato cultivars during storage at various temperatures

International Nuclear Information System (INIS)

Amjad, A.; Randhawa, M.A.; Butt, M.S.; Asghar, M.

2016-01-01

Processing industry needs continuous supply of tubers for fries/chips preparation throughout the year. Storage is obligatory to meet the increasing demand of population. Objective of this study was to evaluate the processing and quality characteristics of different potato cultivars (Lady Rosetta, Sante, Hermes, Crozo, Kuroda and Asterix) during storage with 75-80 percent relative humidity for the period of 160 days at various temperatures (3 degree C, 7 degree C, 11 degree C). Quality parameters such as specific gravity, sprouting, weight loss, dry matter, starch content, ascorbic acid, sugar content and invertase enzyme activity were determined to estimate the processing potential of each cultivar. High Performance Liquid Chromatography (HPLC) equipped with amino (NH2) column and Refractive Index Detector (RID) was used for the identification and quantification of sugars. The findings of the present work showed that temperature significantly (p Hermes > Crozo > Sante > Asterix > Kuroda. (author)

Bronze railing from Mediana

Directory of Open Access Journals (Sweden)

Vasić Miloje R.

2003-01-01

Full Text Available The hoard containing components of bronze railing was discovered in trench 7 during excavations at Mediana in 2000. Railing consists of cancelli and herms with busts of deities between them. Railing was constructed in such a way that it was possible to disassemble and reassemble it. Three cancelli one fragmented semicancellus cast together with herm and herms, one with bust of Aesculapius and other with bust of Luna. It could be concluded that railing consisted of two segments with passage between them. Male deities were represented on the left segment of the railing and female deities on the right segment. Detailed analysis revealed that Aesculapius as well as Luna bear strong mark of classical Greek and Hellenistic art, which experienced some kind of renaissance in the time of Constantine I. It is very probable that we can recognize the portrait of Faustina, Constantine’s wife in the portrait of Luna. According to the historical events the railing could have been produced before 325 AD when Constantine definitively accepted Christianity at Council of Nicaea. It is difficult to say where the railing had been produced. It had been most probably brought to Mediana during the stay of emperor Julian in Niš in 361. The sculptures found in one room of the villa with peristyle had probably been brought at the same time. The apse of triclinium of this villa had most likely been arranged as small shrine with bronze railing at its entrance. The railing was buried in 378 after battle of Adrianople and invasion of Goths in diocese Dacia.

Role of vector mesons in pion electroproduction

International Nuclear Information System (INIS)

Uleshchenko, V.V.

2007-01-01

The talk is concerned with mechanisms of pion production in deeply inelastic scattering related to the interaction of virtual photon with the nucleon via an intermediate vector-meson state of the probe. A clear evidence of these mechanisms in the HERMES experimental data is revealed

"Kalevi naised" - komöödia, kus nalja ei tehta / Verni Leivak

Index Scriptorium Estoniae

Leivak, Verni, 1966-

2008-01-01

Produtsent Kristian Taska filmib Jüri tehnopargis Kalev Spordis näitamiseks Venezuela seebiseriaali Eesti oludele mugandust "Kalevi naised" (lavastaja Ingomar Vihman, telerežissöör Hermes Brambat, osades Maria Avdjuško, Andrus Vaarik, Jan Uuspõld, Britta Vahur, Ken Saan jt)

Konsolidering af læring

DEFF Research Database (Denmark)

Kirkegaard, Preben Olund; Geisnæs, Dorthe

2016-01-01

. Opbyggelse af konsolideringsstrategier er en langvarig proces. Processen er lang, fordi vidensabstraktion tager tid. Vidensopbyggelsen skal være så velkendt for eleven, at det er muligt for eleverne at genkende og hermed anvende viden til at kunne analysere fremtidige opgaver. https://www.youtube...

More Like Jazz than Classical: Reciprocal Interactions among Educational Researchers and Respondents

Science.gov (United States)

Dance, L. Janelle; Gutierrez, Rochelle; Hermes, Mary

2010-01-01

In this article, educational scholars L. Janelle Dance, Rochelle Gutierrez, and Mary Hermes share insights from their lived experience as qualitative researchers trying to work in collaboration with diverse populations. They refer to these insights as "improvisations on conventional qualitative methods," reminding readers that their…

Research

African Journals Online (AJOL)

abp

9 juil. 2015 ... stratégique de la gestion des ressources hospitalières. Hermès ... soins et les décideurs politiques s'aperçoivent que les objectifs du millénium pour le ..... un mauvais recrutement des syndicalistes, la faible collaboration du.

Physico-chemical, functional and processing attributes of some ...

African Journals Online (AJOL)

A study was generated from six commercial potato varieties and studied for their physical, chemical, functional and processing attributes. Lady Rosetta followed by Hermes was the most appreciable varieties concerning their physical attributes. A positive correlation (R = 0.765) existed between tuber firmness and specific ...

Neue Taxa von Lunatipula Edwards aus der mediterranen Subregion der Paläearktis (Diptera, Tipulidae, Tipula Linnaeus)

NARCIS (Netherlands)

Theischinger, Günther

1977-01-01

21 new species and one new subspecies of Lunatipula Edwards are described and their affinities are discussed. The new taxa are: Tipula (Lunatipula) hermes from Marocco, T.(L.) parallela from the Iberian peninsula, T.(L.) xyrophora from Italy and France, T.(L.) lubenauorum and rauschorum from Italy,

Avaliação de rugas cutâneas da região periorbital baseada em processamento digital de imagens /

OpenAIRE

Brand, Vinicius Cubas

2007-01-01

Orientador: Hélio Pedrini Co-orientador: José Hermênio C.Lima Filho Inclui apêndice Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciencias Exatas, Programa de Pós-Graduação em Informática. Defesa: Curitiba, 2007 Inclui bibliografia

Simulation of spring barley yield variability in different climatic zones of Northern and Central Europe

DEFF Research Database (Denmark)

Rötter, R P; Palosuo, T; Kersebaum, K C

2012-01-01

In this study, the performance of nine widely used and accessible crop growth simulation models (APES-ACE, CROPSYST, DAISY, DSSAT-CERES, FASSET, HERMES, MONICA, STICS and WOFOST) was compared during 44 growing seasons of spring barley (Hordeum vulgare L.) at seven sites in Northern and Central...

Aspects of Mathematical Logic

CERN Document Server

Casari, Ettore

2011-01-01

H. Hermes: Basic notions and applications of the theory of decidability.- D. Kurepa: On several continuum hypotheses.- A. Mostowski: Models of set theory.- A. Robinson: Problems and methods of model theory.- S. Sochor, B. Balcar: The general theory of semisets. Syntactic models of the set theory.

L'herméneutique paranoïaque

OpenAIRE

Englebert, Jérôme

2013-01-01

This paper addresses the issue of paranoiac hermeneutic (search for meaning and significance). As any human hermeneutics, this tendency to interpret the world includes a relational dimension as well as a bodily dimension. Three paradigms are proposed by the author to define this hermeneutics: (1) "the hazard does not exist" (2) " a certainty that is yet to be proved" and (3) "the paranoiac is unable to turn to a third party". This theoretical and clinical study also discusses the paranoiac lo...

Brug af mindfulness til facilitering

DEFF Research Database (Denmark)

Adriansen, Hanne Kirstine; Krohn, Simon

2011-01-01

Gennem de senere år er mindfulness gået fra udelukkende at være en eksistentiel praksis til også at være en behandlingsform og senest til også at blive brugt som et praktisk redskab i erhvervslivet. Denne artikel viser, at mindfulness også kan anvendes i forbindelse med facilitering. Facilitering...... er et værktøj, som bruges i arbejdslivet fx til møder og konferencer, hvor en gruppe mennesker er samlet for at lære eller udrette noget sammen. Det nye ved at kombinere mindfulness med facilitering er, at fokus hermed ændres fra individet, som er centrum for den eksistentielle fordybelse eller det...... terapeutiske forløb, til gruppen, som er udgangspunktet i facilitering. Artiklen viser, hvordan mindfulness konkret kan bruges på gruppeniveau og diskuterer samtidig hvilke problemer, der kan være forbundet hermed. Baseret på vores egne erfaringer, diskuterer vi, hvordan mindfulness kan påvirke en gruppes...

STRESS TESTS FOR VIDEOSTREAMING SERVICES BASED ON RTSP PROTOCOL

Directory of Open Access Journals (Sweden)

Gabriel Elías Chanchí Golondrino

2015-11-01

Full Text Available Video-streaming is a technology with major implications these days in such diverse contexts as education, health and the business sector; all of this regarding the ease it provides for remote access to live or recorded media content, allowing communication regardless of geographic location. One standard protocol that enables implementation of this technology is real time streaming protocol, or RTSP. However, since most application servers and Internet services are supported on HTTP requests, very little research has been done on generating tools for carrying out stress tests on streaming servers. This paper presents a stress measuring tool called Hermes, developed in Python, which allows calculation of response times for establishing RTSP connections to streaming servers, as well as obtaining RAM memory consumption and CPU usage rate data from these servers. Hermes was deployed in a video-streaming environment where stress testing was carried out on the LIVE555 server, using calls in the background to VLC and OpenRTSP open source clients. 

CRV 2008: Fifth Canadian Conference on Computerand Robot Vision, Windsor, ON, Canada, May 2008

DEFF Research Database (Denmark)

Fihl, Preben

This technical report will cover the participation in the fifth Canadian Conference on Computer and Robot Vision in May 2008. The report will give a concise description of the topics presented at the conference, focusing on the work related to the HERMES project and human motion and action...

Values on Stage

DEFF Research Database (Denmark)

Hansen, Jette Barnholdt

2016-01-01

Oplægget undersøger berøringsflader mellem den epideiktiske retorik og musikteater og plæderer for, at epideiktiske læsninger kan give et overblik over et værks værdier og hermed være med til at placere det i en kulturel kontekst....

Transverse target-spin asymmetry in exclusive electroproduction of ρ0 mesons

International Nuclear Information System (INIS)

Dreschler, Jeroen

2008-10-01

This thesis reports the first measurements of the asymmetry in exclusive ρ 0 electroproduction from a transversely polarized proton. The asymmetry was extracted from data taken by the HERMES experiment at DESY with a polarized internal hydrogen gas target and the 27.6 GeV electron (positron) beam of HERA. (orig.)

TRANSVERSELY POLARIZED Λ PRODUCTION

International Nuclear Information System (INIS)

BORER, D.

2000-01-01

Transversely polarized Λ production in hard scattering processes is discussed in terms of a leading twist T-odd fragmentation function which describes the fragmentation of an unpolarized quark into a transversely polarized Λ. We focus on the properties of this function and its relevance for the RHIC and HERMES experiments

986-IJBCS-Article-Dr Niebie Roger

African Journals Online (AJOL)

DR GATSING

activité antioxydante des extraits de basilic. En effet, après 23 jours de .... d'un appareil du type Clevenger pendant 3 heures. Lors de la distillation, l'huile ... conservée dans des flacons en verre ambré hermétiquement fermés et conservés au.

Defending an Area with Autonomy: Autonomous Intelligence, Surveillance, and Reconnaissance Capabilities Leveraging Unmanned Aerial Systems for Defending Forward Operating Locations

Science.gov (United States)

2017-05-08

plan or global communications proves this behavior has potential.51 To decrease technical maturity and risk, current swarm implementations focus on...22 Figure 5 Hermes 900 with Modular Payloads...challenge current US C2ISR advantages by being faster, harder to detect, more maneuverable, have greater destructive power, disrupt communications

Transverse target-spin asymmetry in exclusive electroproduction of {rho}{sup 0} mesons

Energy Technology Data Exchange (ETDEWEB)

Dreschler, Jeroen

2008-10-15

This thesis reports the first measurements of the asymmetry in exclusive {rho}{sup 0} electroproduction from a transversely polarized proton. The asymmetry was extracted from data taken by the HERMES experiment at DESY with a polarized internal hydrogen gas target and the 27.6 GeV electron (positron) beam of HERA. (orig.)

Native American Languages Act. Hearing before the Committee on Indian Affairs, United States Senate. One Hundred Eighth Congress, First Session on S. 575 To Amend the Native American Languages Act To Provide for the Support of Native American Language Survival Schools (May 15, 2003).

Science.gov (United States)

Congress of the U.S., Washington, DC. Senate Committee on Indian Affairs.

This document includes statements given at this hearing by the following: William Y. Brown; John Cheek, Jennifer Chock; Rita Coosewon; David Dinwoodie; William Demmert, Jr.; Joycelyn DesRosier; Mary Hermes; Carla Herrera; Leanne Hinton; Holo Ho'opai; Hon. Daniel K. Inouye; Lawrence D. Kaplan; Keiki Kawaiaea; Rosalyn, LaPier; Lisa LaRonge; Vina…

Teaching Sexuality through Media

Science.gov (United States)

Cragin, Becca

2015-01-01

A central project of feminism has been raising awareness of the role cultural formations of sexuality play in women's inequality (Ritzenhoff and Hermes). Feminists who regularly include discussions of sexuality in their teaching are familiar with the pedagogical challenges of the subject as well as its importance. This article is intended for…

Revealing the ISM in high redshift starburst galaxies: An analysis of Herschel PACS and SPIRE FTS spectroscopic observations of HerMES and H-ATLAS-selected lensed galaxies

Science.gov (United States)

Cooray, Asantha

In the quest to develop a fundamental understanding of galaxy formation and evolution, observations of dusty star-forming galaxies (DSFGs) promise significant progress this decade. The importance of DSFGs is highlighted by the fact that half of the energy emitted by extragalactic sources emerges as dust-reprocessed light at infrared (IR) to sub millimeter wavelength. In the post-herschel\\ era, we are now at a unique position to tackle some of the key questions on galaxy formation and evolution because of the large area Herschel's Key Project surveys (HerMES and H-ATLAS). In particular those surveys have allowed us to identify a sample of 250 strongly gravitationally lensed DSFGs at z > 1. They give us a unique opportunity to dissect the detailed structures and kinematics of DSFGs. The Herschel Science Archive also contains individual follow up data on 44 and 25 of the brightest sources with SPIRE-FTS and PACS, respectively, in the spectroscopy mode, taking over 250 hours in four open-time programs. Only one of the 44 SPIRE FTS targets has yet to appear in the published literature. One of the four include an open-time 2 PACS spectroscopy program that was led at UCI by a former postdoc from the PI's group. That program was initially approved at Priority 2 in 2011, but was triggered in late 2012 and achieved 100% completion during the last two weeks of Herschel lifetime in May 2013. This archival analysis, interpretation, and modeling program involves two parts: (i) PACS spectroscopy in 50 to 200 microns of 25 lensed galaxies in the fine-structure emission lines [SiII]34, [SIII]33, [OIV]26, [OIII]52, [NIII]57 and [OI]63, and the molecular hydrogen H_2 S(0) and S(1). (ii) SPIRE FTS spectroscopy of 44 lensed galaxies, including above 25, over the wavelength range of 200 to 600 microns targeting [CII]158, [OIII]88, [OI]63/145, and [NI]122. The analysis will lead to a better understanding of the ISM of starbursting galaxies that span 1 research supports Goal 2 of the

Risk of disease following occupational exposure to Polychlorinated Biphenyls

DEFF Research Database (Denmark)

Ellen Bøtker Pedersen, Ellen Bøtker; Jacobsen, Peter; Jensen, Allan Astrup

Der har i de senere år været stigende bevågenhed omkring de mulige helbredsmæssige konsekvenser af PCB-udsættelse i indeklimaet og ved bygningsrenovering og affaldshåndtering. Parallelt hermed er der i videnskabelige undersøgelser rejst mistanke om, at forskellige helbredseffekter har kunnet sætt...

De sociale mediers brugervilkår del I - aftalen

DEFF Research Database (Denmark)

Feldthusen, Rasmus Kristian; Larsen, Torsten Bjørn

2016-01-01

Det Sociale Medium som f.eks. Twitter, Snapchat, Foursquare, Facebook, Instagram, Pinterest, Tinder og Youtube har betinget sig en række standardvilkår som Brugeren, der måtte ønske at oprette en Profil, skal acceptere som led i oprettelsen. Ved at klikke på ”opret profil” eller en hermed...

Persondatabehandling i journalistisk øjemed

DEFF Research Database (Denmark)

Jakobsen, Søren Sandfeld; Schaumburg-Müller, Sten

2017-01-01

Den nye persondataforordning kræver, at medlemsstaterne fastsætter regler for persondatabehandling i journalistisk øjemed. Artiklen analyserer de retlige udfordringer, der er forbundet hermed, påpeger, at de gældende regler både er utilstrækkelige og vil være i strid med forordningen, analyser er...

Med Kingo på dybt vand

DEFF Research Database (Denmark)

Arndal, Lars Stubbe

2014-01-01

Tag med digteren Thomas Kingo ud på dybt vand i selskab med lektor og mag.art. Lars Arndal, der kaster nye perspektiver på Kingos forlisdigt Hierte-Suk. Arndal kommer hermed også med et bud på, hvordan man som lærer kan invitere eleverne med på opdagelse i digtet...

Forårets konflikter godt for den danske model

DEFF Research Database (Denmark)

Scheuer, Steen

2008-01-01

Den store vinder ved forårets konflikter var den danske model for aftaler på arbejdsmarkedet. De offentlige fagforeninger fik sig en lærestreg, da regeringen og Folketinget til de flestes overraskelse lod de lovlige konflikter løbe i ugevis. For hermed tvang man parterne, og især forbundene, til...

Snake and staff symbolism in healing | Retief | Acta Theologica

African Journals Online (AJOL)

Since time immemorial the snake has been venerated as an enigmatic creature with supernatural powers. As a snake and staff symbol it is also traditionally associated with the healing arts, either as the single-snake attribute of Asclepius, or as the doublesnake attribute of Hermes. In this article the mythological basis for this ...

At musikere

DEFF Research Database (Denmark)

Nielsen, Steen Kaargaard; Krogh, Mads

2014-01-01

Den new zealandske musikforsker Christopher Small lancerede i 1998 med sin bog af samme navn begrebet musicking som betegnelse for en forståelse af musik som praksis. Hermed formuleredes i ét begreb den afstandtagen til forståelser af musik som struk- tur eller værk, som i øvrigt findes vidt...

Transverse polarizaton of Λ and anti Λ hyperons in quasireal photoproduction

International Nuclear Information System (INIS)

Airapetian, A.; Akopov, N.; Akopov, Z.

2007-04-01

The HERMES experiment has measured the transverse polarization of Λ and anti Λ hyperons produced inclusively in quasireal photoproduction at a positron beam energy of 27.6 GeV. The transverse polarization P n Λ of the Λ hyperon is found to be positive while the observed anti Λ polarization is compatible with zero. The values averaged over the kinematic acceptance of HERMES are P n Λ = 0.078 ± 0.006 (stat) ± 0.012 (syst) and P n anti Λ = -0.025 ± 0.015 (stat) ± 0.018 (syst) for Λ and anti Λ, respectively. The dependences of P n Λ and P n anti Λ on the fraction of ζ the beam's light-cone momentum carried by the hyperon and on the hyperon's transverse momentum p T were investigated. The measured Λ polarization rises linearly with p T and exhibits a different behavior for low and high values of ζ, which approximately correspond to the backward and forward regions in the center-of-mass frame of the γ * N reaction. (orig.)

Intense electron-beam transport in the ion-focused regime through the collision-dominated regime

International Nuclear Information System (INIS)

Sanford, T.W.L.; Poukey, J.W.; Welch, D.R.; Mock, R.C.

1993-01-01

This paper reviews the transport of the 19-MeV, 700-kA, 25-ns Hermes-III electron beam in long gas cells filled with N 2 gas spanning six decades in pressure from 10 3 to ∼10 3 Torr. We show through measurements and theoretical analyses that the beam has two windows of stable transport: a low-pressure window (between ∼1 and ∼100 mTorr) that is dominated by propagation in the semi-collisionless IFR (ion-focused regime), and a high-pressure window (between ∼1 and ∼100 Torr) that is dominated by propagation in the resistive CDR (collision-dominated regime). In the CDR, 79±1.5% of the beam energy is transported over 11 m at 20 Torr. In the IFR, we show that intense radiation fields with controllable rise times and pulse widths can be generated on axis at a bremsstrahlung target. In summary, the measurements and analyses presented here provide a quantitative description of the Hermes-III beam transport over six decades in pressure

Maritim epidemiologi på Supercourse

DEFF Research Database (Denmark)

Jensen, Olaf

2015-01-01

Maritim epidemiologi er nu kommet med i samlingen af undervisningsmidler på ”Supercourse”. Der er oprettet en særlig mappe med Maritime Epidemiology og alle der har gode bidrag inden for området opfordres hermed til at publicere her. Supercourse er en samling af foredrag beregnet til at være en r...

Fictions of Hybridity

DEFF Research Database (Denmark)

Larsen, Ingemai

2009-01-01

Ida Klitgards originale og meget velskrevne bog anvender et begreb fra de postkoloniale studier, nemlig hybriditet, som gennemgående parameter for en analyse af de danske oversættelser af Joyce´s mesterværk. Hermed vinder såvel de postkoloniale studier som oversættelsesteorien en ny dimension og ...

Missing links

DEFF Research Database (Denmark)

Hedin, Gry

2011-01-01

I de sidste tiår har flere Munch-forskere peget på ligheder mellem de videnskabelige studier af mennesket og Edvard Munchs kunst. Det gælder også Munchs første version af Skrik. Trods dette mangler der dog en analyse af den kontekst, der hermed relateres til billedet. Har Munch ikke bare fundet i...

Veterinær paternalisme

DEFF Research Database (Denmark)

Sandøe, Peter

2016-01-01

Respekt for klientens selvbestemmelse står højt i kurs hos den veterinære profession i USA og England. I kontrast hertil synes mange danske dyrlæger at lægge vægt på at vise omsorg over for svage klienter. Hermed er der lagt op til en etisk diskussion....

DIKU-LASMEA Workshop on Computer Vision, Copenhagen, March, 2009

DEFF Research Database (Denmark)

Fihl, Preben

This report will cover the participation in the DIKU-LASMEA Workshop on Computer Vision held at the department of computer science, University of Copenhagen, in March 2009. The report will give a concise description of the topics presented at the workshop, and briefly discuss how the work relates...... to the HERMES project and human motion and action recognition....

Anlægsteknik 2

DEFF Research Database (Denmark)

Hermed foreligger en ny udgave af Anlægsteknik 2, hvor der er en del ændringer i forhold til 3. udgave. Dette skyldes at fagområdet Anlægsteknik er under konstant udvikling, og nye relevante emner derfor er medtaget i denne udgave samt at andre forældede emner er fjernet. Anlægsteknik 2 har...

The Soul of Sophistry

DEFF Research Database (Denmark)

Larsen, Jens Kristian

2007-01-01

Artiklen søger at påvise, at en omstridt passage i Platons dialog "Sofisten", som oftest anses som en art digression i forhold til resten af dialogen, er en afgørende, metodisk passage, der kaster lys over målsætningen for hele dialogen. Hermed søges det tillige vist, at det "sokratiske element" ...

Environmental assessment of garden waste management

DEFF Research Database (Denmark)

Boldrin, Alessio

Mængden af indsamlet haveaffald har været jævnt voksende i Danmark i løbet af det sidste årti, og udgør hermed en stigende udfordring for de lokale myndigheder og affaldsfirmaer. På nuværende tidspunkt bliver størstedelen af haveaffaldet behandlet på centraliserede kompostfaciliteter, men både fo...

Acciones equivalentes y solución en desplazamientos interpolada en la viga de Bernouilli-Euler

OpenAIRE

Romero, J. L.; Ortega, M. A.

1998-01-01

Se propone un método para el cálculo de la viga de Bernoulli-Euler que permite optimizar los resultados obtenidos mediante los elementos finitos hermíticos tradicionales. La principal ventaja es que puede aproximar con gran bondad los desplazamientos y esfuerzos en el interior de los elementos, incluso para elementos de gran tamaño.

Bankbestyrelsens byrder

DEFF Research Database (Denmark)

Birkmose, Hanne Søndergaard; Clausen, Nis Jul; Ohnemus, Lars Christian

2017-01-01

Indledningsvis analyserer artiklen ud fra en juridisk synsvinkel udviklingen i de regulatoriske tiltag på det finansielle område, som er gennemført i kølvandet på finanskrisen. Der er særlig fokus på de nye krav, som stilles til bestyrelsen i danske pengeinstitutter. I sammenhæng hermed redegøres...

PHILOSOPHY AND PRACTICE IN AFRICA Hermes F. Chidammodzi

African Journals Online (AJOL)

issues of immediate concern and importance for philosophy. The aim in this paper .... human beings and their environment, raising fundamental questions and attempting ... rational. "13 Unfortunately, most of his speculative propositions have been read ... One might even say that the Marxian appeal is most applicable here.

Kunstnike Liidu volikogu koosolek toimus 20. X Ku-Ku klubis

Index Scriptorium Estoniae

2003-01-01

Kinnitati EKLi 2004. a. eelarve, selle toetustest. Harry Liivrand tutvustas Kunstihoone ja selle galerii, Reet Varblane Linnagalerii, Elin Kard Hobusepea ja Draakoni galerii 2004. a. näituseplaane. Ateljee Vabaduse väljak 6-35 otsustati anda rendile Ülle Marksile, ateljee Ristiku 27 müüa Rafael Arutjunjanile. EKLi uued liikmed: Andrus Joonas, Alice Kask, Hermes Sarapuu, Epp Viires, Kristel Sibul

Nuclear Physics Laboratory, University of Colorado, Final Progress Report 14 February 2004

International Nuclear Information System (INIS)

Kinney, E.R.

2004-01-01

OAK-B135 The results and progress of research funded by DOE grant number DOE-FG03-95ER40913 at the University of Colorado at Boulder is described. Includes work performed at the HERMES experiment at DESY to study the quark structure of the nucleon and the hadronization process in nuclei, as well as hadronic reactions studied at LAMPF, KEK, and Fermilab

Metamorfosi e natura nella poetica di Gabriele d'Annunzio | Meda ...

African Journals Online (AJOL)

The article deals with the concepts of metamorphosis and nature as key elements in D'Annunzio's art. In his view, the poet himself is transformed by the practice of his own art into an Hermetic figure, who — like Hermes, the god who guides the souls of the dead across the threshold dividing the world of the living and the ...

AVSS 2007: IEEE International Conference onAdvanced Video and Signal based Surveillance, London, UK, September 2007

DEFF Research Database (Denmark)

Fihl, Preben

This technical report will cover the participation in the IEEE International Conference on Advanced Video and Signal based Surveillance in September 2007. The report will give a concise description of the most relevant topics presented at the conference, focusing on the work related to the HERMES...... project and human motion and action recognition. Our contribution to the conference will also be described....

Dedica degli Aeinautai di Eretria

Directory of Open Access Journals (Sweden)

Leone, Barbara

2017-06-01

Full Text Available The Aeinautae’ votive inscription was found in 1961 near the theatre of ancient Eretria. Variously dated at the beginning or at the end of the fifth century, it is an important element of the research that underlined the endemicity of the relation of Eretria with the sea. The dedication represents the most ancient occurrence of Hermes cult in Eretria.

Väike luulekaleidoskoop. III / Jürgen Rooste

Index Scriptorium Estoniae

Rooste, Jürgen, 1979-

2009-01-01

Ülevaade järgmistest luuleraamatutest: Anmann, Aarne. Südametunnistuse mälestuseks. Tartu : A. Anmann, 2009 ; Ilmet, Peep. Meilmail. Tallinn : Varrak, 2009 ; Kasemaa, Andrus. Lagunemine. Tallinn : Eesti Keele Sihtasutus, 2009 ; Kuus, Anti ; Oll, Sulev. Öö mõte on kuus. Tallinn : Akta A. K., 2008 ; Meres, Triinu. Lagunemine. Tartu : Hermes, 2009 ; Tasuja, Triin. Provintsiluule. Tartu : Värske Rõhk, 2009

Applicability of two automated disintegration apparatuses for rapidly disintegrating (mini)tablets.

Science.gov (United States)

Sieber, Daniel; Lazzari, Alessia; Quodbach, Julian; Pein, Miriam

2017-03-01

Orally disintegrating (mini)tablets (OD(M)Ts) are of interest in the field of pharmaceutics. Their orodispersible character is defined by the disintegration time, which is measured with a basket apparatus according to the European Pharmacopoeia. This method, however, lacks applicability for ODTs and especially ODMTs. New disintegration apparatuses have been described in literature, but a qualification to assess the applicability has not been described. A qualification procedure for two automated disintegration apparatuses, OD-mate and Hermes apparatus, is introduced. Aspects of the operational qualification as well as precision and accuracy regarding a performance qualification were evaluated for both apparatuses analog to the ICH guideline Q2. While the OQ study is performed separately for each apparatus, accuracy and precision were performed following the same protocol for both testers. Small RSDs (16.9% OD-mate; 15.2% Hermes compared to 32.3% for the pharmacopeial method) were found despite very fast disintegration times (1.5 s for both apparatuses). By comparing these RSDs to practical examples, the authors propose threshold values for repeatability depending on the mean disintegration time. Obtained results from the qualification were used to assess the applicability of both apparatuses.

The Ion Propulsion System for the Solar Electric Propulsion Technology Demonstration Mission

Science.gov (United States)

Herman, Daniel A.; Santiago, Walter; Kamhawi, Hani; Polk, James E.; Snyder, John Steven; Hofer, Richard R.; Parker, J. Morgan

2015-01-01

The Asteroid Redirect Robotic Mission is a candidate Solar Electric Propulsion Technology Demonstration Mission whose main objectives are to develop and demonstrate a high-power solar electric propulsion capability for the Agency and return an asteroidal mass for rendezvous and characterization in a companion human-crewed mission. The ion propulsion system must be capable of operating over an 8-year time period and processing up to 10,000 kg of xenon propellant. This high-power solar electric propulsion capability, or an extensible derivative of it, has been identified as a critical part of an affordable, beyond-low-Earth-orbit, manned-exploration architecture. Under the NASA Space Technology Mission Directorate the critical electric propulsion and solar array technologies are being developed. The ion propulsion system being co-developed by the NASA Glenn Research Center and the Jet Propulsion Laboratory for the Asteroid Redirect Vehicle is based on the NASA-developed 12.5 kW Hall Effect Rocket with Magnetic Shielding (HERMeS0 thruster and power processing technologies. This paper presents the conceptual design for the ion propulsion system, the status of the NASA in-house thruster and power processing activity, and an update on flight hardware.

Ratios of helicity amplitudes for exclusive ρ0 electroproduction on transversely polarized proton

Directory of Open Access Journals (Sweden)

Manaenkov Serguei

2017-01-01

Full Text Available Exclusive ρ0-meson electroproduction is studied by the HERMES experiment, using the 27.6 GeV longitudinally polarized electron/positron beam of HERA and a transversely polarized hydrogen target, in the kinematic region 1.0 GeV2 < Q2 < 7.0 GeV2, 3.0 GeV < W < 6.3 GeV, and −t′ < 0.4 GeV2. Using an unbinned maximum-likelihood method, 25 parameters are extracted. They determine the real and imaginary parts of the ratios of certain helicity amplitudes describing ρ0-meson production by a virtual photon, where the denominator is the dominant amplitude F012012${F_{0{1 \\over 2}}}_{0{1 \\over 2}}$. The latter is the nucleon-helicity-non-flip amplitude, which describes the production of a longitudinal ρ0 meson by a longitudinal virtual photon. The transverse target polarization allows for the first time the extraction of ratios of a number of nucleon-helicity-flip amplitudes to F012012${F_{0{1 \\over 2}}}_{0{1 \\over 2}}$. The ratios of nucleon-helicity-non-flip amplitudes are found to be in good agreement with those from the previous HERMES analysis.

Future measurements of deeply virtual Compton scattering

International Nuclear Information System (INIS)

Korotkov, V.A.; Nowak, W.D.

2001-09-01

Prospects for future measurements of Deeply Virtual Compton Scattering are studied using different simple models for parameterizations of generalized parton distributions (GPDs). Measurements of the lepton charge and lepton beam helicity asymmetry will yield important input for theoretical models towards the future extraction of GPDs. The kinematics of the HERMES experiment, complemented with a recoil detector, was adopted to arrive at realistic projected statistical uncertainties. (orig.)

IAU nomenclature for albedo features on the planet Mercury

Science.gov (United States)

Dollfus, A.; Chapman, C. R.; Davies, M. E.; Gingerich, O.; Goldstein, R.; Guest, J.; Morrison, D.; Smith, B. A.

1978-01-01

The International Astronomical Union has endorsed a nomenclature for the albedo features on Mercury. Designations are based upon the mythological names related to the god Hermes; they are expressed in Latin form. The dark-hued albedo features are associated with the generic term Solitudo. The light-hued areas are designated by a single name without generic term. The 32 names adopted are allocated on the Mercury map.

MC generator HARDPING 2.0: hadron production in lepton-nuclei interactions at high energies

International Nuclear Information System (INIS)

Berdnikov, Ya.A.; Ivanov, A.E.; Kim, V.T.; Murzin, V.A.

2011-01-01

Hadron production in lepton-nucleus interactions at high-energies is considered in framework of developing Monte Carlo (MC) generator HARDPING (HARD Probe INteraction Generator). Such effects as formation length, energy loss and multiple rescattering for produced hadrons are implemented into the HARPING. Available data from HERMES on hadron production in lepton-nucleus collisions are described by the current version of the HARDPING generator in a reasonable agreement.

A redução à prova da experiência

Directory of Open Access Journals (Sweden)

Natalie Depraz

2014-07-01

Full Text Available L'article présente une nouvelle description de l'épochè qui repose sur un changement de paradigme concernant le statut de la phénoménologie. Substituant une approche pragmatique à l'approche herméneutique traditionnelle, l'article définit les trois composantes de l’épochè: la suspension, la rediretion et le lacher-prise.

Theoretical Issues in Strangeness Production

International Nuclear Information System (INIS)

Laget, Jean-Marc

2000-01-01

After pioneering works on hypernuclei, strangeness production mechanisms have been studied in hadron collisions and photoreactions in the sixties. Recent experiments at SATURNE and COSY, in the hadronic sector, as well as ELSA and JLab, in the electromagnetic sector, have confirmed our basic ideas on the reaction mechanisms. In the near future, strangeness production at JLab, HERMES and COMPASS may prove to be a powerful tool to study hadronic matter

IPAD II (Integrated Programs for Aerospace-Vehicle Design) Advances in Distributed Data Base Management for CAD/CAM (Computer-Aided Design and Manufacturing Technology). Proceedings of a National Symposium Held in Denver, Colorado, April 17-19, 1984.

Science.gov (United States)

1984-01-01

et al. "DATANET/HERMES: Un Sistema Per La Gestione Di Basi Di Dati Distribuite", Annual Conference, A.I. C. A., Pavia, (September 1981). [9] Neuhold...to move to more sophisticated integrated CAD/CAM applications. A geometrically complete three-dimensional des - cription is required for such purposes...definitions and semantic constructs for these types of applications have achieved a de facto degree of standardization and normalization (a common and

Numerical Modelling of Flow and Settling in Secondary Settling Tanks

OpenAIRE

Dahl, Claus Poulsen

1995-01-01

Denne afhandling omhandler udviklingen af en numerisk model til simulering af efterklaringstanke. lndledningsvis er beskrevet status for udviklingen inden for numeriske modeller for efterklaring og den nuværende designpraksis. Resultatet af denne statusbeskrivelse er et behov for videre udvikling for at indføre numeriske modeller i design af efterklaringstanke og hermed forbedre efterklaringstanke i fremtiden. This thesis discusses the development of a numerical model for the simulation of...

Deep electroproduction of exotic hybrid mesons

International Nuclear Information System (INIS)

Anikin, I.V.; Pire, B.; Szymanowski, L.; Teryaev, O.V.; Wallon, S.

2004-01-01

We evaluate the leading order amplitude for the deep exclusive electroproduction of an exotic hybrid meson in the Bjorken regime. We show that, contrarily to naive expectation, this amplitude factorizes at the twist 2 level and thus scales like usual meson electroproduction when the virtual photon and the hybrid meson are longitudinally polarized. Exotic hybrid mesons may thus be studied in electroproduction experiments at JLAB, HERA (HERMES) or CERN (Compass)

The structure of the nucleon

International Nuclear Information System (INIS)

Dueren, M.

2001-01-01

The spin and flavor structure of quarks and gluons in nucleons and nuclei is more complicated than expected in the original naive quark model. Recent results which show some of the key failures of the naive picture are summarized here with emphasis on recent results from the HERMES experiment. Some future options to study the quarks structure in exclusive processes in electroproduction, photoproduction and pp annihilation are presented. (orig.)

Keynote address: discipline and chaos

Science.gov (United States)

Tom Goodale

2001-01-01

There is no poetry in NERR Proceedings. So I'm going to rectify that and start with a few lines from a poem by W.H. Auden that have both amused and taunted me since I read them over 30 years ago. Entitled, "Under Which Lyre," it was the Phi Beta Kappa poem, delivered at Harvard University, in 1946. Auden compared the lyres of Apollo and Hermes to convey...

Sõdurid annavad politseile tööd / Toomas Herm

Index Scriptorium Estoniae

Herm, Toomas, 1961-

2018-01-01

Kokkuvõte eelmisel aastal Lääne-Virumaal toime pandud kuritegudest. Eelmisel aastal kasvas maakonnas narkootikumidega seotud väärtegude arv, milles suurt rolli mängis Tapal baseeruv 1. jalaväepataljon

HERMES: Collaboration and Knowledge Interoperability in Maritime Interdiction Operations

Science.gov (United States)

2011-03-09

be loaded as new  canvases  or set as links from an existing  canvas . This capability is useful for exchanging image files,  such as  fingerprints  and...propertie ied and imple E  canvases , 2 uggested by   ox onto a can rs do not nee uch easier to ers and colu us easy to ob  for task step and procedu d...different symbols onto a  canvas  from a  palette. The specific symbols are pre‐loaded for a specific mission or domain. They can include basic  military

The first ep collider run and future plans

International Nuclear Information System (INIS)

Desy, R.B.

1993-01-01

After successful machine commissioning in 1991, the new electron-proton collider HERA was ready to start the experimental program in spring last year. Data taking at the ZEUS and H1 experiments began on June 26. The energy of the colliding beams was E e =26.7 GeV and E p = 820 GeV, in accord with the design. The peak luminosity obtained so far was 2.2x10 29 cm -2 s -1 . Until the end of the experimental run in November 1992 an integrated luminosity of 33 nb -1 was delivered to the experiments. Future plans concerning ep operation focus on increasing the number of colliding bunches in order to approach the design goal for the luminosity of 1.5x10 31 cm -2 s -1 . In the electron ring, up to 60% transverse spin polarization have been achieved. It is planned to install a polarized gas target experiment (Hermes, approved as the 3rd HERA experiment) which will require an electron beam with about 50% longitudinal polarization. The machine modifications required for HERMES are scheduled for the 93/94 winter shut down. Furthermore, the possibilities of installing a fixed target experiment for b-quark physics in the proton ring are being studied

LE PROBLÈME HERMÉNEUTIQUE DE L’AMOUR NÉVROTIQUE

Directory of Open Access Journals (Sweden)

Yevgeny MEDVEDEV

2010-11-01

Full Text Available En relançant le problème herméneutique en tant qu’enjeu entre la catégorie du général et celle du particulier, ce travail cherche à systématiser les manifestations variées du désir amoureux dans la Recherche. Nous trouvons dans le roman la mise-en-œuvre de deux types d’amour analysés par Denis de Rougemont dans son L’Amour et l’occident : l’ amour-passion oriental et l’amour chrétien de la créature. Puisque ces deux types d’amour sont irréconciliables, ils se livrent constamment la bataille, dont l’aboutissement est ce que nous nommons l’amour-jalousie. Cette catégorie du désir est névrotique, car elle se base sur le voisinage simultané du désir de la présence et de l’absence de l’être aimé. Nous montrons dans la présente réflexion qu’en posant au lecteur le défi de la contradiction de l’amour-jalousie, c’est au problème herméneutique que le roman proustien le confronte.

Political risk and export promotion: evidence from Germany

OpenAIRE

Moser, Christoph; Nestmann, Thorsten; Wedow, Michael

2006-01-01

Political risk represents an important hidden transaction cost that reduces international trade. This paper investigates the claim that German public export credit guarantees (Hermes guarantees) mitigate this friction to trade flows and hence promote exports. We employ an empirical trade gravity model, where we explicitly control for political risk in the importing country in order to evaluate the effect of export guarantees. The idea behind export promotion through public export credit agenc...

Multimodality image registration. A special development in medical imaging has been strongly influenced by a small but highly qualified software think-tank

International Nuclear Information System (INIS)

Diemling, M.

2007-01-01

The importance of image fusion and registration in the field of medical diagnostics will be shown. After some details and background of image registration, as well as the history of nuclear medicine imaging - given by the example of HERMES Medical Solutions of Stockholm, Sweden - the reader finds seven cases illustrating the clinical importance of this method. These cases were collected from various fields of applications of medical imaging, they are carefully documented and illustrated. (orig.)

Effekten af absolut kumulation

DEFF Research Database (Denmark)

Kyvsgaard, Britta; Klement, Christian

2012-01-01

Som led i finansloven for 2011 blev regeringen og forligspartierne enige om at undersøge reglerne om strafudmåling ved samtidig pådømmelse af flere kriminelle forhold og i forbindelse hermed vurdere konsekvenserne af at ændre de gældende regler i forhold til kapacitetsbehovet i Kriminalforsorgens...... samlet bødesum ved en absolut kumulation i forhold til en modereret kumulation, som nu er gældende....

HERMES: A tool to prepare documentation for access to plants; HERMES: Una Herramienta para la preparacion de la documentacion de acceso a las plantas

Energy Technology Data Exchange (ETDEWEB)

Serrano Vizcaino, J.; Rodriguez Montalban, J. R.; Garcia Valcarcel, M.

2012-07-01

The appearance of the IS-12 standard has marked a before and after in the entry requirements to the plants. Its impact, in companies like Tecnatom that mobilizing a large number of people to perform services during refueling stops, has forced the design of a tool to help prepare the personnel access documentation in an in a flexible and efficient.

Longitudinal target-spin azimuthal asymmetry in Deeply-Virtual Compton Scattering

Energy Technology Data Exchange (ETDEWEB)

Kopytin, M.

2006-08-22

As a generalization of the usual Parton Distribution Functions (PDFs) Generalized Parton Distributions (GPDs), introduced a decade ago, contain additional information about quark and gluon distributions in the plane transverse to the direction of motion of the nucleon. Strong interest in GPDs was triggered by the work of X. Ji who demonstrated that in the forward limit GPDs can give information about the total angular momentum carried by quarks (gluons) in the nucleon. The hard exclusive electroproduction of a real photon, called Deeply Virtual Compton Scattering (DVCS), appears to be the theoretically cleanest way to access GPDs experimentally. This process has a final state identical to that of the Bethe-Heitler (BH) process where the photon is radiated from either incoming or outgoing lepton. Both processes are experimentally indistinguishable as their amplitudes interfere. The interference term involves linearly the amplitudes of the DVCS process giving access to GPDs. In this thesis results from HERMES are reported on an azimuthal asymmetry with respect to the spin of the proton target, which is attributed to the interference between the Bethe-Heitler process and the DVCS process. The asymmetry, also referred to as the longitudinal target-spin asymmetry (LTSA), gives access mainly to the polarized GPD H. The kinematic dependences of the LTSA on t, x{sub B} and Q{sup 2} are measured and compared with the corresponding measurements on the deuteron. The results are compared with theoretical calculations and with the recent CLAS measurements. The data, used for analysis in this thesis, have been accumulated by the HERMES experiment at DESY scattering the HERA 27.6 GeV positron beam off hydrogen and deuterium gas targets. Additionally, production tests of the HELIX128 3.0 chip are discussed. The chip is the frontend readout chip of the silicon recoil detector. The latter is a part of the HERMES recoil detector, which is built around the target area in order to

Longitudinal target-spin azimuthal asymmetry in Deeply-Virtual Compton Scattering

International Nuclear Information System (INIS)

Kopytin, M.

2006-01-01

As a generalization of the usual Parton Distribution Functions (PDFs) Generalized Parton Distributions (GPDs), introduced a decade ago, contain additional information about quark and gluon distributions in the plane transverse to the direction of motion of the nucleon. Strong interest in GPDs was triggered by the work of X. Ji who demonstrated that in the forward limit GPDs can give information about the total angular momentum carried by quarks (gluons) in the nucleon. The hard exclusive electroproduction of a real photon, called Deeply Virtual Compton Scattering (DVCS), appears to be the theoretically cleanest way to access GPDs experimentally. This process has a final state identical to that of the Bethe-Heitler (BH) process where the photon is radiated from either incoming or outgoing lepton. Both processes are experimentally indistinguishable as their amplitudes interfere. The interference term involves linearly the amplitudes of the DVCS process giving access to GPDs. In this thesis results from HERMES are reported on an azimuthal asymmetry with respect to the spin of the proton target, which is attributed to the interference between the Bethe-Heitler process and the DVCS process. The asymmetry, also referred to as the longitudinal target-spin asymmetry (LTSA), gives access mainly to the polarized GPD H. The kinematic dependences of the LTSA on t, x B and Q 2 are measured and compared with the corresponding measurements on the deuteron. The results are compared with theoretical calculations and with the recent CLAS measurements. The data, used for analysis in this thesis, have been accumulated by the HERMES experiment at DESY scattering the HERA 27.6 GeV positron beam off hydrogen and deuterium gas targets. Additionally, production tests of the HELIX128 3.0 chip are discussed. The chip is the frontend readout chip of the silicon recoil detector. The latter is a part of the HERMES recoil detector, which is built around the target area in order to detect the

Comparing the performance of 11 crop simulation models in predicting yield response to nitrogen fertilization

OpenAIRE

Salo , Tapio J.; Palosuo , Taru; Kersebaum , Kurt Christian; Nendel , Claas; Angulo , Carlos; Ewert , Frank; Bindi , Marco; Calanca , Pierluigi; Klein , Tommy; Moriondo , Marco; Ferrise , Roberto; Olesen , Jørgen Eivind; Patil , Rasmi H.; Ruget , Francoise; Takac , Jozef

2016-01-01

Eleven widely used crop simulation models (APSIM, CERES, CROPSYST, COUP, DAISY, EPIC, FASSET, HERMES, MONICA, STICS and WOFOST) were tested using spring barley (Hordeum vulgare L.) data set under varying nitrogen (N) fertilizer rates from three experimental years in the boreal climate of Jokioinen, Finland. This is the largest standardized crop model inter-comparison under different levels of N supply to date. The models were calibrated using data from 2002 and 2008, of which 2008 included si...

Methylmercury Screening Models for Surface Water Habitat Restoration: A Case Study in Duluth-Superior Harbor

Science.gov (United States)

2017-11-01

Spreadsheet-based Ecological Risk Assessment for the Fate of Mercury SLR St. Louis River THg Total Mercury TOC Total Organic Carbon TSS Total...carbon ( TOC ), and redox in sediment. HERMES is contained in Microsoft Excel spreadsheets, determines steady-state conditions, and requires fixed ratios...5 1.46E+5 m3/hr Volume / Residence Time TOC in Sediment 4.7 11.4 % Kleeberg 2010; Shulz and Gücker 2005 Redox in Sediment -100 125 mV Jaynes and

Nuclear enhanced power corrections to DIS structure functions

OpenAIRE

Guo, Xiaofeng; Qiu, Jianwei; Zhu, Wei

2001-01-01

We calculate nuclear enhanced power corrections to structure functions measured in deeply inelastic lepton-nucleus scattering in Quantum Chromodynamics (QCD). We find that the nuclear medium enhanced power corrections at order of $O(\\alpha_s/Q^2)$ enhance the longitudinal structure function $F_L$, and suppress the transverse structure function $F_1$. We demonstrate that strong nuclear effects in $\\sigma_A/\\sigma_D$ and $R_A/R_D$, recently observed by HERMES Collaboration, can be explained in ...

Investigation of transverse-momentum-dependent functions (TMD) in azimuthal spin asymmetries of semi-inclusive deep inelastic nucleon scattering

International Nuclear Information System (INIS)

Zagrebelnyy, Vitaly

2015-02-01

In this work the beam single spin asymmetries (BSA) in SIDIS were extracted for charged pions, charged kaons and (anti)protons. The analyzed data was collected at the HERMES experiment during the years 1996-2007 with a longitudinally polarized beam on hydrogen and deuterium targets. The here presented analysis extends previously published results. The coincidence of newly extracted results with previously published results and the independent crosscheck of each step of analysis confirms the accuracy of this work.

Generation, control, and transport of a 19-MeV, 700-kA pulsed electron beam

International Nuclear Information System (INIS)

Sanford, T.W.L.; Halbleib, J.A.; Poukey, J.W.; Welch, D.R.; Mock, R.C.; Skogmo, P.J.; Mikkelson, K.A.

1993-01-01

The authors show experimentally and theoretically that the generation of the 13-TW Hermes III electron beam can be accurately monitored, and that the beam can be accurately directed onto a high-Z target to produce a wide variety of bremsstrahlung patterns. This control allows the study of radiation effects induced by gamma rays to be extended into new parameter regimes. Finally, they show that the beam can be stably transported in low-pressure gas cells

REDEFINITION OF LUXURY FASHION BRANDING THROUGH SUSTAINABILITY RENAISSANCE: RE(F)USE CASE

OpenAIRE

Bilsel, Hande

2017-01-01

The luxury fashion industry is a global multi-billion dollar industry including a wide array of brands with massive halo effect, brand heritage and high consumer relevance such as Fendi, Prada, Louis Vuitton, Gucci and Hermes which are also among the most valuable and influential brands in the world. The established traditional methods of luxury marketing mostly focused on product innovation and exclusive brand advertising practices. With a perspective to built up a synergy between its histor...

Komparace event marketingových strategií luxusních módních značek v letech 2010-2012

OpenAIRE

Mašková, Tereza

2013-01-01

Bachelor thesis "Comparison of event marketing strategies of luxury fashion brands in the years 2010-2012" deals with the event marketing as a tool through which selected luxury fashion brands (Dolce & Gabbana, Hermès, Louis Vuitton) on the Czech market communicate with their customers. First, the thesis defines the essence of event marketing and its position in the marketing communications mix. Subsequently, it indicates the main aspects of the luxury sector and characterizes the basic princ...

{sup 177}Lutetium-DOTATATE peptide radio-receptor therapy for patients with endocrine neoplasm and the individualized semi-automatic dosimetry. A retrospective analysis; {sup 177}Lutetium-DOTATATE-Peptid-Radio-Rezeptor-Therapie bei Patienten mit neuroendokrinen Neoplasien und die individualisierte, semi-automatische-Dosimetrie. Eine retrospektive Analyse

Energy Technology Data Exchange (ETDEWEB)

Loeser, Anastassia

2016-09-28

The {sup 177}lutetium-DOTATATE peptide radio-receptor therapy is a promising approach for the palliative treatment of patients with inoperable endocrine neoplasm. The individually variable biological dispersion and the tumor uptake including the protection of critical organs require a precise and reliable organ and tumor dosimetry. The HERMES Hybrid dosimetry module has appeared as reliable and user-friendly tool for clinical application. The next step is supposed to by the complete integration of 3D SPECT imaging.

First use of ECOSIM in air management system

International Nuclear Information System (INIS)

Perez Vara, R.; Torroglosa Ponce, V.; Lebru, A.; Novara, M.

1993-01-01

ECOSIM is a software tool for the simulation of Environmental Control and Life Support (ECLS) systems which has been developed for the European Space Agency. A preliminary model of the Hermes Air Management System has been developed during the ECOSIM testing in order to assess the functionality of the software and to verify its results with those obtained from previous simulation tools. The model represents the Hermes cabin with its crew and it includes submodels for the sub-systems performing the following functions: - Temperature and Humidity Control; - Total Pressure and Composition Control; - Air revitalisation. The interactions between these different subsystem are taken into account by the model, while many of the previous simulations made assumptions to decouple the different subsystems (e.g: a constant cabin temperature has been assumed during cabin depressurization transients, to decouple the pressure control section from the air conditioning section). The model allows to check the validity of these kind of assumption. The paper also presents the results obtained with this model for the following experiments: - Normal 24 hour cycle; - Re-entry; - Depressurization due to a micro-meteorite hole; - Failure of the condensate water separators. The first version of ECOSIM will be released to the space industry before the end of year 1992 and the user's feedback will lead to improvements being implemented in later versions. (author)

Comprendre le développement professionnel par l’analyse des discours

Directory of Open Access Journals (Sweden)

Sabine Vanhulle

2011-07-01

Full Text Available Dans un dispositif consacré au développement professionnel, nos étudiants en enseignement secondaire tiennent un portfolio. Celui-ci se clôture par un récit de trajectoire. Notre recherche réside dans l’analyse de ces récits à partir d’une grille d’indicateurs linguistiques. Ces indicateurs nous informent sur les processus réflexifs et discursifs à l’œuvre dans l’élaboration de savoirs professionnels. Ce premier niveau de description conduit à une méthode de recherche herméneutique. Il s’agit alors de mettre en lumière les préoccupations sous-jacentes à ces processus : systèmes de valeurs, de motivations et d’intentions ; tensions entre les savoirs scientifiques et la confrontation aux réalités vécues dans l’expérience ; constructions identitaires conflictuelles. Nous questionnons les conditions sociales externes et propres au contexte de formation qui influencent la production de ces récits. Nous en dégageons les implications méthodologiques pour l’analyse de discours à visée descriptive et compréhensive. Sur cette base, nous discutons quelques résultats de la recherche.Mots-clés : Portfolio. Savoirs professionnels écrits. Indicateurs de développement. Formation des valeurs. Herméneutique.

Feasibility Study for a Combined Radiation Environment in the ACRR-FRECII Cavity.

Energy Technology Data Exchange (ETDEWEB)

Parma, Edward J.

2017-12-01

The objective of this report is to determine the feasibility of a combined pulsed - power accelerator machine, similar to HERMES - III, with the Annular Core Research Reactor (ACRR) Fueled - Ring External Cavity (FREC - II) in a new facility. The document is conceptual in nature, and includes some neutronic analysis that i llustrates that that the physics of such a concept would be feasible. There would still be many engineering design considerations and issues that would need to be investigated in order to determine the true viability of such a concept. This report does n ot address engineering design details, the cost of such a facility, or what would be required to develop the safety authorization of the concept. The radiation requirements for the "on - target" gamma - ray dose and dose rate are not addressed in this report . It is assumed that if the same general on - target specifications for a HERMES - III type machine could be met with the proposed concept, that the machine would b e considered highly useful as a radiation effects sciences platform. In general, the combined accelerator/ACRR reactor concept can be shown to be feasible with no major issues that would preclude the usefulness of such a facility. The new facility would provide a capability that currently does not exist in the radiation testing complex.

MIMO Underwater Acoustic Communications in Ports and Shallow Waters at Very High Frequency

Directory of Open Access Journals (Sweden)

Gaultier Real

2013-10-01

Full Text Available Hermes is a Single-Input Single-Output (SISO underwater acoustic modem that achieves very high-bit rate digital communications in ports and shallow waters. Here, the authors study the capability of Hermes to support Multiple-Input-Multiple-Output (MIMO technology. A least-square channel estimation algorithm is used to evaluate multiple MIMO channel impulse responses at the receiver end. A deconvolution routine is used to separate the messages coming from different sources. This paper covers the performance of both the channel estimation and the MIMO deconvolution processes using either simulated data or field data. The MIMO equalization performance is measured by comparing three relative root mean-squared errors (RMSE, obtained by calculations between the source signal (a pseudo-noise sequence and the corresponding received MIMO signal at various stages of the deconvolution process; prior to any interference removal, at the output of the Linear Equalization (LE process and at the output of an interference cancellation process with complete a priori knowledge of the transmitted signal. Using the simulated data, the RMSE using LE is −20.5 dB (where 0 dB corresponds to 100% of relative error while the lower bound value is −33.4 dB. Using experimental data, the LE performance is −3.3 dB and the lower bound RMSE value is −27 dB.

HerMES: THE FAR-INFRARED EMISSION FROM DUST-OBSCURED GALAXIES

International Nuclear Information System (INIS)

Calanog, J. A.; Wardlow, J.; Fu, Hai; Cooray, A.; Assef, R. J.; Bock, J.; Riechers, D.; Schulz, B.; Casey, C. M.; Conley, A.; Farrah, D.; Oliver, S. J.; Roseboom, I. G.; Ibar, E.; Kartaltepe, J.; Magdis, G.; Rigopoulou, D.; Marchetti, L.; Pérez-Fournon, I.; Scott, Douglas

2013-01-01

Dust-obscured galaxies (DOGs) are an ultraviolet-faint, infrared-bright galaxy population that reside at z ∼ 2 and are believed to be in a phase of dusty star-forming and active galactic nucleus (AGN) activity. We present far-infrared (far-IR) observations of a complete sample of DOGs in the 2 deg 2 of the Cosmic Evolution Survey. The 3077 DOGs have (z) = 1.9 ± 0.3 and are selected from 24 μm and r + observations using a color cut of r + – [24] ≥ 7.5 (AB mag) and S 24 ≥ 100 μJy. Based on the near-IR spectral energy distributions, 47% are bump DOGs (star formation dominated) and 10% are power-law DOGs (AGN-dominated). We use SPIRE far-IR photometry from the Herschel Multi-tiered Extragalactic Survey to calculate the IR luminosity and characteristic dust temperature for the 1572 (51%) DOGs that are detected at 250 μm (≥3σ). For the remaining 1505 (49%) that are undetected, we perform a median stacking analysis to probe fainter luminosities. Herschel-detected and undetected DOGs have average luminosities of (2.8 ± 0.4) × 10 12 L ☉ and (0.77 ± 0.08) × 10 12 L ☉ , and dust temperatures of (33 ± 7) K and (37 ± 5) K, respectively. The IR luminosity function for DOGs with S 24 ≥ 100 μJy is calculated, using far-IR observations and stacking. DOGs contribute 10%-30% to the total star formation rate (SFR) density of the universe at z = 1.5-2.5, dominated by 250 μm detected and bump DOGs. For comparison, DOGs contribute 30% to the SFR density for all z = 1.5-2.5 galaxies with S 24 ≥ 100 μJy. DOGs have a large scatter about the star formation main sequence and their specific SFRs show that the observed phase of star formation could be responsible for their total observed stellar mass at z ∼ 2

HerMES: THE FAR-INFRARED EMISSION FROM DUST-OBSCURED GALAXIES

Energy Technology Data Exchange (ETDEWEB)

Calanog, J. A.; Wardlow, J.; Fu, Hai; Cooray, A. [Department of Physics and Astronomy, University of California, Irvine, CA 92697 (United States); Assef, R. J. [Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109 (United States); Bock, J.; Riechers, D.; Schulz, B. [California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125 (United States); Casey, C. M. [Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822 (United States); Conley, A. [Center for Astrophysics and Space Astronomy 389-UCB, University of Colorado, Boulder, CO 80309 (United States); Farrah, D.; Oliver, S. J.; Roseboom, I. G. [Astronomy Centre, Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QH (United Kingdom); Ibar, E. [Instituto de Astrofísica, Facultad de Física, Pontificia Universidad Católica de Chile, Casilla 306, Santiago 22 (Chile); Kartaltepe, J. [National Optical Astronomy Observatory, 950 North Cherry Avenue, Tucson, AZ 85719 (United States); Magdis, G.; Rigopoulou, D. [Department of Astrophysics, Denys Wilkinson Building, University of Oxford, Keble Road, Oxford OX1 3RH (United Kingdom); Marchetti, L. [Department of Physical Sciences, The Open University, Milton Keynes MK7 6AA (United Kingdom); Pérez-Fournon, I. [Instituto de Astrofísica de Canarias (IAC), E-38200 La Laguna, Tenerife (Spain); Scott, Douglas [Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1 (Canada); and others

2013-09-20

Dust-obscured galaxies (DOGs) are an ultraviolet-faint, infrared-bright galaxy population that reside at z ∼ 2 and are believed to be in a phase of dusty star-forming and active galactic nucleus (AGN) activity. We present far-infrared (far-IR) observations of a complete sample of DOGs in the 2 deg{sup 2} of the Cosmic Evolution Survey. The 3077 DOGs have (z) = 1.9 ± 0.3 and are selected from 24 μm and r {sup +} observations using a color cut of r {sup +} – [24] ≥ 7.5 (AB mag) and S{sub 24} ≥ 100 μJy. Based on the near-IR spectral energy distributions, 47% are bump DOGs (star formation dominated) and 10% are power-law DOGs (AGN-dominated). We use SPIRE far-IR photometry from the Herschel Multi-tiered Extragalactic Survey to calculate the IR luminosity and characteristic dust temperature for the 1572 (51%) DOGs that are detected at 250 μm (≥3σ). For the remaining 1505 (49%) that are undetected, we perform a median stacking analysis to probe fainter luminosities. Herschel-detected and undetected DOGs have average luminosities of (2.8 ± 0.4) × 10{sup 12} L{sub ☉} and (0.77 ± 0.08) × 10{sup 12} L{sub ☉}, and dust temperatures of (33 ± 7) K and (37 ± 5) K, respectively. The IR luminosity function for DOGs with S{sub 24} ≥ 100 μJy is calculated, using far-IR observations and stacking. DOGs contribute 10%-30% to the total star formation rate (SFR) density of the universe at z = 1.5-2.5, dominated by 250 μm detected and bump DOGs. For comparison, DOGs contribute 30% to the SFR density for all z = 1.5-2.5 galaxies with S{sub 24} ≥ 100 μJy. DOGs have a large scatter about the star formation main sequence and their specific SFRs show that the observed phase of star formation could be responsible for their total observed stellar mass at z ∼ 2.

Evaluation of fluence to dose equivalent conversion factors for high energy radiations, (1)

International Nuclear Information System (INIS)

Sato, Osamu; Uehara, Takashi; Yoshizawa, Nobuaki; Iwai, Satoshi; Tanaka, Shun-ichi.

1992-09-01

Computer code system and basic data have been investigated for evaluating fluence to dose equivalent conversion factors for photons and neutrons up to 10 GeV. The present work suggested that the conversion factors would be obtained by incorporating effective quality factors of charged particles into the HERMES (High Energy Radiation Monte Carlo Elaborate System) code system. The effective quality factors for charged particles were calculated on the basis of the Q-L relationships specified in the ICRP Publication-60. (author)

THE RELATIONSHIP BETWEEN FINANCIAL CRISIS, CORRUPTION, AND CORPORATE SOCIAL RESPONSIBILITY IN ROMANIA

Directory of Open Access Journals (Sweden)

Costel IONASCU

2010-01-01

Full Text Available The aim of the paper is to evaluate the influence of the financial crisis and corruption on the corporate social behaviour of Romanian organisations. Starting from the reference literature on financial crisis, corruption and corporate social responsibility, this article is an investigation of the impact that financial crisis and corruption characteristics have on the corporate social responsibility of the organisations. Our research underpins quantitative and qualitative methodology based on the outcomes of the HeRmeS international project.

Are tutor-students capable of writing good biochemistry exams?

OpenAIRE

Alexandre B., Sé; Depto. Biologia Celular, UnB, Brasília, DF, 70910-900; Passos, Renato M.; Depto. Biologia Celular, UnB, Brasília, DF, 70910-900; Hermes-Lima, Marcelo; Depto. Biologia Celular, UnB, Brasília, DF, 70910-900

2004-01-01

In a previous article we described the relevance of student seminars for the learning process of appliedbiochemistry for medical and nutrition students (Hermes-Lima et al., Biochem. Mol.Biol.Educ. 30:30-34,2002). First semester students of a basic biochemistry course (BioBio) are divided in 10 groupsof 5 members, and each group is assigned to a specic topic (diabetes, cholesterol, etc) under thesupervision of a tutor-student. The tutors have already coursed BioBio and are currently undertakin...

Stochastic Uncertainty Quantification of Eddy Currents in the Human Body by Polynomial Chaos Decomposition

OpenAIRE

Gaignaire , Roman; Scorretti , Riccardo; Sabariego , Ruth ,; Geuzaine , Christophe

2011-01-01

The finite element method can be used to compute the electromagnetic fields induced in the human body by environmental extremely low frequency (ELF) fields. However, the electric properties of tissues are not precisely known and may vary depending on the individual, his/her age and other physiological parameters. In this paper, we account for the uncertainties on the conductivities of the brain tissues and spread them out to the induced fields by means of a nonintrusive approach based on Herm...

Are there approximate relations among transverse momentum dependent distribution functions?

Energy Technology Data Exchange (ETDEWEB)

Harutyun AVAKIAN; Anatoli Efremov; Klaus Goeke; Andreas Metz; Peter Schweitzer; Tobias Teckentrup

2007-10-11

Certain {\\sl exact} relations among transverse momentum dependent parton distribution functions due to QCD equations of motion turn into {\\sl approximate} ones upon the neglect of pure twist-3 terms. On the basis of available data from HERMES we test the practical usefulness of one such ``Wandzura-Wilczek-type approximation'', namely of that connecting $h_{1L}^{\\perp(1)a}(x)$ to $h_L^a(x)$, and discuss how it can be further tested by future CLAS and COMPASS data.

Data to the knowledge of the macrolepidoptera fauna of the Sălaj-region, Transylvania, Romania (arthropoda: insecta

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Bálint Zs

2016-01-01

Full Text Available We provide 984 data of 88 collecting events originating from the Sălaj-region of western Transylvania, Romania. These have been assembled in the period between 22. April, 2014 and 10. September, 2015. Geographical, spatial and temporal records to the knowledge of 98 butterflies (Papilionoidea and 225 moths (Bombycoidea, Drepanoidea, Geometroidea, Noctuoidea and Sphingoidea are given representing the families (species numbers in brackets Hesperiidae (8, Lycaenidae (28, Nymphalidae (28, Papilionidae (3, Pieridae (13 Riodinidae (1, Satyridae (17 (Papilionoidea; Arctiidae (11, Ctenuchidae (1, Lymantriidae (1, Noctuidae (119, Nolidae (2, Notodontidae (6 Thyatiridae (4, (Noctuoidea; Drepanidae (3 (Drepanoidea; Geometridae (73 (Geometroidea; Lasiocampidae (2, Saturniidae (1 (Bombycoidea; Sphingidae (2 (Sphingoidea. According to the most recent catalogue of the Romanian Lepidoptera fauna 31 species proved to be new for the region Sălaj. The following 43 species have faunistical interest, therefore they are briefly annotated: Agrochola humilis, Agrochola laevis, Aplocera efformata, Aporophila lutulenta, Atethmia centrago, Bryoleuca felina, Calyptra thalictri, Chazara briseis, Colias chrysotheme, Coscinia cribraria, Cupido osiris, Cyclophora albipunctata, Cymatophorima diluta, Drepana curvatula, Dryobotodes monochroma, Eilema caniola, Eilema palliatella, Eucarta amethystina, Eucarta virgo, Euphydryas aurinia, Eupithecia inturbata, Euxoa cos, Euxoa distinguenda, Everes alcetas, Hemaris tityus, Leptidea major, Lycaena thersamon, Maculinea arion, Maculinea teleius, Maniola tithonus, Meganephria bimaculosa, Noctua interjecta, Nothocasis sertata, Nymphalis xanthomelas, Perconia strigillaria, Phyllophila obliterata, Plebejides sephirus, Pyrgus armoricanus, Rhyacia lucipeta, Scotochrosta pulla, Scotopteryx vicinaria, Selidosema plumaria, Shargacucullia gozmanyi. Amongst them Euxoa cos, Plebejides sephirus and Scotopteryx vicinaria turned to be the most

Diversity and distribution of butterflies (Insecta: Lepidoptera of district Dir lower, Khyber Pukhtoonkhwa, Pakistan

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Muhammad Inayatullah Khan

2016-03-01

Full Text Available Butterflies are the fine-looking creatures and act as ecological indicators and pollinators. The present study is the first record of Butterfly fauna of Dir lower. Collection was carried out during March - August 2013. The specimens were collected and identified with the help of taxonomic keys and preserved specimens in National Insect Museum Islamabad. The collection of 375 specimens were preserved. Identification revealed 24 species belonging to 20 genera and 7 families. The species are Papilio polyctor Boisduval, Papilio demoleus Linnaeus, Junonia almanac Linnaeus, Pararge schakra Kollar, Junonia hierta Fabricius, Junonia orythea Linnaeus, Argyrius hyperbius Linnaeus, Hypolimnus bolina Linnaeus, Vanessa cashmiriensis Kollar, Phalantha phalantha Drury, Melitea didyma Esper, Lycaena phalaeas Linnaeus, Lybithea lipita Moore, Danius chrysippus Linnaeus, Hipparchia parasitas Kollar, Lethe rohria Fabricius, Maniola davendra Moore, Pontia daplidice Linnaeus, Belenois aurota Fabricius, Pieris brassicae Linnaeus, Colias erate Esper, Eurema hecabe Linnaeus, Colias fieldi Linnaeus and Cynthia cardui Linnaeus. The highest population was shown by Pieris brassicae followed by Danius chrysippus and Cynthia cardui. Twelve species belong to family Nymphalidae (50%, which shows the highest abundance rate. Butterfly density was the highest at Timergara. Butterfly fauna was the highest in May followed by August and lowest in March. It is concluded that pollution free environment of Dir Lower is more suitable for the survival of butterfly fauna. Large scale study is required to fully explore the butterfly fauna of the area.

Problematic mobile phone use in adolescents : derivation of a short scale MPPUS-10

OpenAIRE

Foerster, Milena; Roser, Katharina; Schoeni, Anna; Röösli, Martin

2015-01-01

Our aim was to derive a short version of the Mobile Phone Problem Use Scale (MPPUS) using data from 412 adolescents of the Swiss HERMES (Health Effects Related to Mobile phonE use in adolescentS) cohort.; A German version of the original MPPUS consisting of 27 items was shortened by principal component analysis (PCA) using baseline data collected in 2012. For confirmation, the PCA was carried out again with follow-up data 1 year later.; PCA revealed four factors related to symptoms of addicti...

Conservação de sementes de ipê Conservation of "ipê" seeds

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Jocely Andreuccetti Maeda

1984-01-01

Full Text Available Sementes de algumas espécies de ipê foram submetidas a diferentes temperaturas de armazenamento, determinando-se a sua porcentagem de germinação a cada quarenta dias, por um período de trinta meses. Nas condições fornecidas de 10 ºC, 29 ºC e 30 ºC em embalagem hermeticamente fechada, e em saco de papel, a condições ambienteis foram avaliadas as seguintes espécies: Tabebuia avellanedae var. paulensis Tol., Tabebuia chrysotricha (Mart. ex-DC. Standley, Tabebuia impetiginosa (Mart. Standley, Tabebuia rosea (Bertol. DC. e Tabebuia heptaphylla (Vell. Tol. Dentre as condições de armazenamento, o tratamento a 10ºC em vidro hermético foi o que manteve a viabilidade da semente por maior tempo, sendo 20 °C também em vidro hermético o segundo melhor resultado. A germinação das sementes armazenadas em saco de papel a temperatura ambiente foi melhor do que a das que foram armazenadas em vidro hermético a 30 °C, sendo esta a pior condição de armazenagem. A comparação entre as espécies mostrou que Tabebuia heptaphylla, apresenta, além de sementes de maior longevidade, maior resistência às condições adversas de armazenamento.Seeds of some species of "ipê" were stored at different temperatures and the germination percentage was determined at forty-day intervals during thirty months. Seeds were subjected to the following conditions: storage in sealed flasks at 10ºC, 20ºC and 30ºC, and in paper bags at room temperature. The following species were evaluated: Tabebuia avellanedae var. paulensis Tol., Tabebuia chrysotricha (Mart. ex DC. Standley, Tabebuia impetiginosa (Mart. Standley, Tabebuia rosea (Bertol. DC. e Tabebuia heptaphylla (Vell. Tol. Among the treatments studied, storing seeds in sealed flasks at 10°C maintained seed viability for the longest period of time. The second best result was obtained when seeds were kept in sealed flasks at 20ºC. The germination of seeds stored in paper bags at room temperature was higher

DNA/SNLA commonality program

International Nuclear Information System (INIS)

Keller, D.V.; Watts, A.J.; Rice, D.A.; Powe, J.; Beezhold, W.

1980-01-01

The purpose of the Commonality program, initiated by DNA in 1978, was to evaluate e-beam material testing procedures and techniques by comparing material stress and spall data from various US and UK e-beam facilities and experimenters. As part of this joint DNA/SNL/UK Commonality effort, Sandia and Ktech used four different electron-beam machines to investigate various aspects of e-beam energy deposition in three materials. The deposition duration and the deposition profiles were varied, and the resulting stresses were measured. The materials studied were: (1) a low-Z material (A1), (2) a high-Z material (Ta), and (3) a typical porous material, a cermet. Aluminium and tantalum were irradiated using the DNA Blackjack 3 accelerator (60 ns pulse width), the DNA Blackjack 3' accelerator (30 ns pulse width), and the SNLA REHYD accelerator (100 ns pulse width). Propagating stresses were measured using x-cut quartz gauges, carbon gauges, and laser interferometry techniques. Data to determine the influence of deposition duration were obtained over a wide range of energy loadings. The cermet material was studied using the SNLA REHYD and HERMES II accelerators. The e-beam from REHYD generated propagating stresses which were monitored with quartz gauges as a function of sample thickness and energy loadings. The HERMES II accelerator was used to uniformly heat the cermet to determine the Grueneisen parameter and identify the incipient spall condition. Results of these experiments are presented

Diseño e Implementación de un Multiprocessor Systems-on-Chip (MPSoC Interconectado por una Networks-on-Chip (NoC

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Wilson Mauricio Chicaiza

2013-11-01

Full Text Available En el presente documento se presenta una breve caracterización de los medios de comunicación empleados en arquitecturas multiprocesadas. Esta caracterización tiene como objetivo principal el mostrar un nuevo modelo de comunicación basado en conmutación de paquetes a los cuales se les denomina como Networks-On-Chip (NoC. Esta publicación muestra una arquitectura de red llamada NoC Hermes, la cual fue interconectada a un Multiprocessor-Systems-on-Chip (MPSoC compuesto de cuatro procesadores MicroBlaze. Está conexión se la realizó gracias al diseño y desarrollo de una Interfaz de Red generada en código VHDL. Por medio de la Interfaz de Red se consiguió que los procesadores MicroBlaze interactúen con los Switches de Hermes a fin de crear una arquitectura multiprocesada interconectada por una NoC. Con el motivo de realizar comparaciones también se creó otra arquitectura de multiprocesadores interconectados por buses. Para ambas arquitecturas se desarrolló una aplicación de Esteganografía enla que existe multiprocesamiento de dos procesadores trabajando simultáneamente. Lamentablemente sobre dicha aplicación no fue posible medir directamente la latencia y el consumo de energía, razón por la cual se utilizó simuladores que permitieron estimar dichas mediciones.

El espacio ciudadano: integración/exclusión en el imaginario y la realidad ateniense del siglo VI a.c.

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Miriam VALDÉS GUÍA

2010-02-01

Full Text Available RESUMEN: El s. VI en Atenas es un momento crucial para la definición y delimitación ciudadana que se realiza al mismo tiempo que una separación tajante entre esclavos-mercancía y ciudadanos. Las medidas legislativas de Solón en este sentido se ven refrendadas, también en época de los pisistrátidas, por una organización y jerarquización del espacio de la ciudad, especialmente el agora (marcada por rituales purificatorios de entrada a la misma y los gimnasios. Asimismo se produce y se busca en el campo del imaginario ateniense la relación entre ciertas fiestas y cultos heroicos y divinos (como Heracles, Hefesto y Hermes, y la plena integración cívica.ABSTRACT: The Sixth Century B.C. was a crucial moment in Athens for the delimitation and definition of citizenship, which took place at the same time as the clear separation between slaves and the citizens. The legal measures of Solon in this sense were accompanied -also in the time of the Peisistratids- by the organisation and the hierarchy of city space, especially the agora (whose entrance was marked by purificatory rituals and the gymnasiums. Likewise, Solon and the Peisistratids promoted, in the Athenian imaginary world, links between some feasts and heroic and divine cults (as Heracles, Hephaistos or Hermes, and full integration into citizenship.

Landscaping the structures of GAVI country vaccine supply chains and testing the effects of radical redesign.

Science.gov (United States)

Lee, Bruce Y; Connor, Diana L; Wateska, Angela R; Norman, Bryan A; Rajgopal, Jayant; Cakouros, Brigid E; Chen, Sheng-I; Claypool, Erin G; Haidari, Leila A; Karir, Veena; Leonard, Jim; Mueller, Leslie E; Paul, Proma; Schmitz, Michelle M; Welling, Joel S; Weng, Yu-Ting; Brown, Shawn T

2015-08-26

Many of the world's vaccine supply chains do not adequately provide vaccines, prompting several questions: how are vaccine supply chains currently structured, are these structures closely tailored to individual countries, and should these supply chains be radically redesigned? We segmented the 57 GAVI-eligible countries' vaccine supply chains based on their structure/morphology, analyzed whether these segments correlated with differences in country characteristics, and then utilized HERMES to develop a detailed simulation model of three sample countries' supply chains and explore the cost and impact of various alternative structures. The majority of supply chains (34 of 57) consist of four levels, despite serving a wide diversity of geographical areas and population sizes. These four-level supply chains loosely fall into three clusters [(1) 18 countries relatively more bottom-heavy, i.e., many more storage locations lower in the supply chain, (2) seven with relatively more storage locations in both top and lower levels, and (3) nine comparatively more top-heavy] which do not correlate closely with any of the country characteristics considered. For all three cluster types, our HERMES modeling found that simplified systems (a central location shipping directly to immunization locations with a limited number of Hubs in between) resulted in lower operating costs. A standard four-tier design template may have been followed for most countries and raises the possibility that simpler and more tailored designs may be warranted. Copyright © 2015 Elsevier Ltd. All rights reserved.

Métaphores, paraboles et analogie: La référence à la théologie dans la pensée de Paul Ricœur

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Gilbert Vincent

2012-12-01

Full Text Available Il est admis que l’étude de la métaphore représente une inflexion décisive dans l’herméneutique de Ricœur. On sait peut-être moins que cette étude est concomitante de celle de la parabole, qui représente une inflexion également notable dans la contribution ricœurienne à l’herméneutique biblique. Il arrive pourtant qu’on tire argument de cette concomitance pour prétendre que le transfert de certains présupposés théologiques (quant à la nature du langage et de la Vérité s’en trouve facilité, et l’on ne craint pas d’avancer que les pages consacrées à l’analogia entis, dans La métaphore vive, prouvent la prégnance d’intérêts théologiques douteux dans l’élaboration de la théorie de la métaphore. Pour contrer cette critique dévastatrice, nous nous appuierons sur certaines analyses d’Umberto Eco, qui impliquent que la question des rapports entre analogia entis et métaphore n’a rien d’épistémologiquement scandaleux, et sur celles d’Alain qui, voici un siècle, a esquissé une interprétation des paraboles très proche de celle de Ricœur.

Qu'en est-il de la transmission dans les groupes d'analyse de pratiques en formation ?

OpenAIRE

Vallet, Patricia

2012-01-01

Atelier 21 : Travail social et bénévolat; Ma recherche s'intéresse à la formation des professionnels de la relation, et à cette instance particulière qu'est l'analyse des pratiques : celle-ci suppose la transmission d'une capacité de problématisation des situations professionnelles, un regard critique ajusté, un certain rapport aux savoirs, une attitude herméneutique, et une posture particulière de l'animateur pour favoriser le cheminement des personnes en formation. Car au-delà d'une meilleu...

Eletroerosão por fio em metal duro para ferramentas de estampagem de lâminas de motores elétricos

OpenAIRE

Hespanhol, Heber de Carvalho

2009-01-01

Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Mecânica. O processo de eletroerosão por fio é utilizado atualmente na fabricação da maioria das matrizes e punções de metal duro (carbeto de tungstênio), usados em ferramentas de estampagem de aços para motores elétricos. As indústrias de eletrodomésticos, motores elétricos industriais, transformadores e compressores herméticos, utilizam ferramentas progressivas de...

AN in inclusive lepton-proton collisions: TMD and twist-3 approaches