cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Optical and transport properties of heavy fermions: theory compared to experiment
Creators: name: Vidhyadhiraja, N S
name: Logan, David E
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Employing a local moment approach to the periodic Anderson model within the framework of dynamical mean-field theory, direct comparison is made between theory and experiment for the dc transport and optical conductivities of paramagnetic heavy fermion and intermediate valence metals. Four materials, exhibiting a diverse range of behaviour in their transport/optics, are analysed in detail: CeB6, YbAl3, CeAl3 and CeCoIn5. Good agreement between theory and experiment is in general found, even quantitatively, and a mutually consistent picture of transport and optics results.
description: 21 pages, 10 figures; Replacement with minor style changes made to avoid postscript file errors
Formation of radiation defects in Silicate and borosilicate glasses caused by UV lamp and excimer laser Irradiation
Creators: name: Natura, Ute
name: Ehrt, Doris
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1999
Subjects: subject: 660

description: Solarization of colourless and coloured glasses of the type AR®, BK7® and DURAN® with high transmission in the UV-B region (280 to 320 nm) was investigated for their use as Container glasses in the solar disinfection of drinking water. The samples were coloured by doping with NiO or CoO. The influence of the Fe³⁺/Fe²⁺ content and of the reducing component Sn²⁺ was investigated on both the initial transmission of the glasses and the solarizadon. The samples were irradiated with a 1 kW Xe lamp and a XeCl excimer laser. The solarization depends on the glass matrix and is enhanced by colouring ions. The influence of Fe³⁺/Fe²⁺ and Sn²⁺ on the defect generation is different for glasses coloured with NiO than for those coloured with CoO. For the samples investigated it was possible to simulate the loss of transmission in the UV-B region due to long-time irradiation with sunlight by a laser experiment.
Agri.Q - Sustainable Rover for Precision Agriculture
Creators: name: Botta, Andrea
Publisher: name: Zenodo
Year: 2022
Subjects: Precision Agriculture
Mobile Robotics
Mobile Manipulator
Agricultural Robotics
Sustainable Development Goals
Multi-Axle Vehicle
Articulated Robot

description: The thesis reports on the design, development, and integration of the articulated mobile robot for precision agriculture and its control architecture. Starting from bibliographic research on precision agriculture with a particular focus on terrestrial robotic platforms (UGVs), the Agri.Q project was then developed with the aim of creating an articulated robot for agriculture in vineyards, or on fields with large slopes, with particular attention to the issue of sustainability and the integration of the robotic platform with monitoring drones and a redundant robotic arm dedicated to collect field samples or to interact with the environment. The thesis therefore reports the mechanical and electronic design process of the robot, focusing on the peculiarities and salient features. The thesis also gives wide space to the study and analysis of the kinematic and dynamic behaviour of the robot navigation through models, simulations, and experimentation on the prototype itself. These results become functional for the implementation of appropriate control strategies to overcome some problems related to the robot architecture and to make it a robust and functional platform. The thesis is accompanied by further phases of experimentation on more specific topics, such as the evaluation of power flows and the effectiveness of solar charging, an initial integration of a redundant robotic arm, and the beginning of preparatory activities for the implementation of autonomous driving.
Electronic supplementary materials and additional figures for manuscript (DOI: 10.1098/rspb.2020.2873) from Tactic-specific antimicrobial activity suggests a parental care function for accessory glands in a marine toadfish
Creators: name: Pepler, Meghan A.
name: Hindra Hindra
name: Miller, Jessica S.
name: Elliot, Marie A.
name: Balshine, Sigal
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Evolutionary Biology
subject: 60801 Animal Behaviour

description: Contains detailed information about the microbiological techniques employed, where animals were captured and sampled, and the statistical analyses performed. As well, we include two additional figures and three tables that provide supplementary data that further supports the data and conclusions presented in the main body of the manuscript.
SO₂ emissions and sulphur balances of soda lime glass melting furnaces : Report of the International Commission on Glass (ICG) Technical Committee 13 "Environment"
Creators: name: Beerkens, Ruud G.C.
name: Van Limpt, Hans
name: Kirchner, Ulrich
name: Scalet, Bianca Maria
name: Kasper, Andreas
name: Van Marcke, Guy
name: Tackels, Guy
name: Delhôpital, George
name: Masy, Charlotte
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1999
Subjects: subject: 660

description: Different analytieal techniques for the determination of sulphur balances of glass furnaces have been compared by the Technical Commission 13 (TC 13 "Environment") of the International Commission on Glass (ICG). The calculation of sulphur balances are demonstrated for float glass and Container glass furnaces. The results show the importance of accurate chemical analysis and mass flow measurements for cullet, glass, raw materials and filter dust to predict the sulphur oxide emissions. For float glass furnaces with and without air pollution control and filter dust recycling, the measured sulphur balances show that the difference in calculated sulphur input and sulphur Output of the glass furnace plus air pollution control System can be limited to 5 %. For Container glass furnaces the fluctuations in cullet fraction and cullet quality and instabilities in the melting process (foaming) may cause larger differences in measured sulphur balances: deviaüons in the ränge of 5 to 15 % have been determined. In case of a requirement for very low SO2 emissions, the filter dust recycling for a fuel oil fired furnace is limited according to the sulphur balance and consequently the filter residue has to be partly disposed.
Centrally concentrated molecular gas driving galactic-scale ionised gas outflows in star-forming galaxies
Creators: name: Hogarth, L. M.
name: Saintonge, A.
name: Cortese, L.
name: Davis, T. A.
name: Croom, S. M.
name: Bland-Hawthorn, J.
name: Brough, S.
name: Bryant, J. J.
name: Catinella, B.
name: Fletcher, T. J.
name: Groves, B.
name: Lawrence, J. S.
name: Lopez-Sanchez, A. R.
name: Owers, M. S.
name: Richards, S. N.
name: Roberts-Borsani, G. W.
name: Taylor, E. N.
name: van de Sande, J.
name: Scott, N.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We perform a joint-analysis of high spatial resolution molecular gas and star-formation rate (SFR) maps in main-sequence star-forming galaxies experiencing galactic-scale outflows of ionised gas. Our aim is to understand the mechanism that determines which galaxies are able to launch these intense winds. We observed CO(1-0) at 1" resolution with ALMA in 16 edge-on galaxies, which also have 2" spatial resolution optical integral field observations from the SAMI Galaxy Survey. Half the galaxies in the sample were previously identified as harbouring intense and large-scale outflows of ionised gas ("outflow-types"), the rest serve as control galaxies. The dataset is complemented by integrated CO(1-0) observations from the IRAM 30-m telescope to probe the total molecular gas reservoirs. We find that the galaxies powering outflows do not possess significantly different global gas fractions or star-formation efficiencies when compared with a control sample. However, the ALMA maps reveal that the molecular gas in the outflow-type galaxies is distributed more centrally than in the control galaxies. For our outflow-type objects, molecular gas and star-formation is largely confined within their inner effective radius ($\rm r_{eff}$), whereas in the control sample the distribution is more diffuse, extending far beyond $\rm r_{eff}$. We infer that outflows in normal star-forming galaxies may be caused by dynamical mechanisms that drive molecular gas into their central regions, which can result in locally-enhanced gas surface density and star-formation.
description: 21 pages
Holographic model of exciton condensation in double monolayer Dirac semimetal
Creators: name: Pikalov, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we consider holographic model of exciton condensation in double monolayer Dirac semimetal. Excitons is a bound states of an electron and a hole. Being Bose particles, excitons can form a Bose-Einstein condensate. We study formation of two types of condensates. In first case both the electron and the hole forming the exciton are in the same layer (intralayer condensate), in the second case the electron and the hole are in different layers (interlayer condensate). We study how the condensates depend on the distance between layers and the mass of the quasiparticles in presence of a strong magnetic field. In order to take into account possible strong Coulomb interaction between electrons we use holographic appoach. The holographic model consists of two $D5$ branes embedded into anti de Sitter space. The condensates are described by geometric configuration of the branes. We show that the distance between layers at which interlayer condensate disappears decreases with quasiparticle mass.
description: 1 figure
Elastic and inelastic properties of soda lime Silicate glass melts
Creators: name: Börnhöft, Hansjörg
name: Brückner, Rolf
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1999
Subjects: subject: 660

description: The influence of CaO on the elastic and inelastic behaviour of soda lime Silicate glass melts of the series (26 - x) Na₂O · x CaO * 74 SiO (composition in mol% with x = 0 to 16) is investigated. Longitudinal and transversal ultrasonic waves in the MHz frequency ränge are transmitted through the glass melt. Their velocities and damping behaviour are measured as functions of temperature. The elastic moduli, internal friction and relaxation times are calculated and their dependence on temperature and viscosity is shown. These properties describe the transition from an elastic to a viscoelastic and fmally to a pure viscous behaviour of the invesdgated glass melts by a large dispersion ränge. Enhanced values of the moduli and activation energies are determined with an increase of CaO content. Thus, the structure of the melt becomes strenger and stiffer i.e. the mean bonding strength and the linkage of the dynamic network of the Silicate melt is improved. The relaxation behaviour can be described by a Maxwell based model with a distribution function of relaxation times.
Dielectric spectroscopy on aging glasses
Creators: name: Lunkenheimer, P.
name: Wehn, R.
name: Loidl, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: In the present work, we provide further evidence for the applicability of a modified stretched-exponential behavior, proposed recently for the description of aging-time dependent data below the glass temperature [P. Lunkenheimer et al., Phys. Rev. Lett. 95 (2005) 055702]. We analyze time-dependent dielectric loss data in a variety of aging glasses, including new data on Salol and propylene carbonate, using a conventional stretched exponential and the newly proposed approach. Also the scaling of aging data obtained at different measuring frequencies, which was predicted on the basis of the new approach, is checked for its validity.
description: 6 pages, 5 figures, submitted to proceedings of 5th IDMRCS, Lille, 2005
title: Mouvements pastoraux avant 1970
Creators: name: De Zborowski, Isolde
name: CIRAD-IEMVT-FRA
Publisher: name: CTA; CIRAD-IEMVT
Year: 1985
Subjects: subject: Pastoralisme
subject: Troupeau
subject: déplacement
subject: Tchad
subject: L01 - Elevage - Considérations générales
subject: P01 - Conservation de la nature et ressources foncières
subject: L01 - Animal husbandry
subject: P01 - Nature conservation and land resources

description: In : Élevage et potentialités pastorales sahéliennes. Synthèses cartographiques. Tchad = Animal husbandry and Sahelian pastoral potentialities. Cartographic synthesis. Chad. CIRAD-IEMVT. Wageningen : CTA-CIRAD-IEMVT. ISBN 2-85985-117-8
Hydrogen/lithium interdiffusion in a lithium aluminosilicate glass studied by NRA and RBS
Creators: name: Dersch, Oliver
name: Laube, Michael
name: Rauch, Friedrich
name: Becker, Otmar
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1999
Subjects: subject: 660

description: Samples of a lithium aluminosilicate (LAS) glass, a model glass for technical LAS glass used in the production of glass ceramics, were treated in hot sulfuric acid and analyzed using Nuclear Reaction Analysis (NRA) techniques for determining hydrogen and lithium depth profiles in the surface layer. It was found that the depth profiles of these two elements are fully complementary, showing that H⁺/Li⁺ ion exchange takes place during the treatment. As revealed by Rutherford Backscattering Spectrometry (RBS) measurements the other glass constituents were not affected by the treatment.
Compressive Spectral Image Reconstruction using Deep Prior and Low-Rank Tensor Representation
Creators: name: Bacca, Jorge
name: Fonseca, Yesid
name: Arguello, Henry
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: Compressive spectral imaging (CSI) has emerged as an alternative spectral image acquisition technology, which reduces the number of measurements at the cost of requiring a recovery process. In general, the reconstruction methods are based on hand-crafted priors used as regularizers in optimization algorithms or recent deep neural networks employed as an image generator to learn a non-linear mapping from the low-dimensional compressed measurements to the image space. However, these data-driven methods need many spectral images to obtain good performance. In this work, a deep recovery framework for CSI without training data is presented. The proposed method is based on the fact that the structure of some deep neural networks and an appropriated low-dimensional structure are sufficient to impose a structure of the underlying spectral image from CSI. We analyzed the low-dimension structure via the Tucker representation, modeled in the first net layer. The proposed scheme is obtained by minimizing the $\ell_2$-norm distance between the compressive measurements and the predicted measurements, and the desired recovered spectral image is formed just before the forward operator. Simulated and experimental results verify the effectiveness of the proposed method.
Analysis of various plunger materials used in the container glass industry
Creators: name: Tanhöfner, Sandra
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1999
Subjects: subject: 660

description: The achievement of high impact strength has a basic influence on the further development of lightweight container glass. The tested articles were 11 nonreturnable flint glass water bottles, produced in the NNPB process. The impact strength of the flint container glass wäre was tested by repeated hitting on the upper contact area in the Shoulder. Four different plunger materials were tested in a 12 section AIS Emhart machine. The test run was structured in an experimental and an analytical part. The paper includes graphic and diagrammatic interpretations concerning the impact strength, the elements from the plunger materials contained in the glass and furthermore the change in the chemical composition of the plunger material after use. The aim of this analysis was to fmd an ideal plunger material, which satisfies the requirements of higher strength for lightweight glass Containers.
Strong optical force induced by morphology dependent resonances
Creators: name: Ng, Jack
name: Lin, Zhifang
name: Chan, C. T.
name: Sheng, Ping
Publisher: name: arXiv
Year: 2005
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We consider the resonant optical force acting on a pair of transparent microspheres by the excitation of the Morphology Dependent Resonance (MDR). The bonding and anti-bonding modes of the MDR correspond to strong attractions and repulsions respectively. The dependence of the force on separation and the role of absorption are discussed. At resonance, the force can be enhanced by orders of magnitude so that it will dominate over other relevant forces. We find that a stable binding configuration can be induced by the resonant optical force.
description: 4 pages, 4 figures
Kasack, Wolfgang (Hrsg.), Tausend Jahre Russische Orthodoxe Kirche - Beiträge von Geistlichen der Russischen Orthodoxen Kirche im Ausland und Wissenschaftlern verschiedener Disziplinen
Creators: name: Thon, Nikolaus
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 39 Nr. 2 (1990): Ökumenische Rundschau, Band 39, Heft 2
Isolation of BiosurfactantProducing Bacteria with Antimicrobial Activity against Bacterial Pathogens
Creators: name: Siripun Sarin
name: Boonruang Khamsri
name: Charoon Sarin
Publisher: name: Thai Society of Higher Education Institutes on Environment
Year: 2011
Subjects: biosurfactant-producing bacteria,antimicrobial activity

description: 1, 4, EnvironmentAsia
Survey of ortho-H$_2$D$^+$ in high-mass star-forming regions
Creators: name: Sabatini, G.
name: Bovino, S.
name: Giannetti, A.
name: Wyrowski, F.
name: Órdenes, M. A.
name: Pascale, R.
name: Pillai, T.
name: Wienen, M.
name: Csengeri, T.
name: Menten, K. M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: (Abridged) We present a large sample of o-H$_2$D$^+$ observations in high-mass star-forming regions and discuss possible empirical correlations with relevant physical quantities to assess its role as a chronometer of star-forming regions through different evolutionary stages. APEX observations of the ground-state transition of o-H$_2$D$^+$ were analysed in a sample of massive clumps selected from ATLASGAL at different evolutionary stages. Column densities and beam-averaged abundances of o-H$_2$D$^+$ with respect to H$_2$, $X$(o-H$_2$D$^+$), were obtained by modelling the spectra under the assumption of local thermodynamic equilibrium. We detect 16 sources in o-H$_2$D$^+$ and find clear correlations between $X$(o-H$_2$D$^+$) and the clump bolometric luminosity and the dust temperature, while only a mild correlation is found with the CO-depletion factor. In addition, we see a clear correlation with the luminosity-to-mass ratio, which is known to trace the evolution of the star formation process. This would indicate that the deuterated forms of H$_3^+$ are more abundant in the early stages of the star formation process and that deuteration is influenced by the time evolution of the clumps. In this respect, our findings would suggest that the $X$(o-H$_2$D$^+$) abundance is mainly affected by the thermal changes rather than density changes in the gas. We have employed these findings together with observations of H$^{13}$CO$^+$, DCO$^+$, and C$^{17}$O to provide an estimate of the cosmic-ray ionisation rate in a sub-sample of eight clumps based on recent analytical work. Our study presents the largest sample of o-H$_2$D$^+$ in star-forming regions to date. The results confirm that the deuteration process is strongly affected by temperature and suggests that o-H$_2$D$^+$ can be considered a reliable chemical clock during the star formation processes, as proved by its strong temporal dependence.
description: 18 pages, 8 figures and 6 tables. To appear in A&A
title: Positions des aires pastorales après 1970-1974
Creators: name: De Zborowski, Isolde
name: CIRAD-IEMVT-FRA
Publisher: name: CTA; CIRAD-IEMVT
Year: 1985
Subjects: subject: Pastoralisme
subject: Troupeau
subject: Distribution géographique
subject: Tchad
subject: L01 - Elevage - Considérations générales
subject: B10 - Géographie
subject: P01 - Conservation de la nature et ressources foncières
subject: L01 - Animal husbandry
subject: B10 - Geography
subject: P01 - Nature conservation and land resources

description: In : Élevage et potentialités pastorales sahéliennes. Synthèses cartographiques. Tchad = Animal husbandry and Sahelian pastoral potentialities. Cartographic synthesis. Chad. CIRAD-IEMVT. Wageningen : CTA-CIRAD-IEMVT. ISBN 2-85985-117-8
All-electron quantum Monte Carlo calculations for the noble gas atoms He to Xe
Creators: name: Ma, A.
name: Drummond, N. D.
name: Towler, M. D.
name: Needs, R. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report all-electron variational and diffusion quantum Monte Carlo (VMC and DMC) calculations for the noble gas atoms He, Ne, Ar, Kr, and Xe. The calculations were performed using Slater-Jastrow wave functions with Hartree-Fock single-particle orbitals. The quality of both the optimized Jastrow factors and the nodal surfaces of the wave functions declines with increasing atomic number Z, but the DMC calculations are tractable and well behaved in all cases. We discuss the scaling of the computational cost of DMC calculations with Z.
Efficiency of Methods to Investigate PAHs Exposure in Fish (Nile Tilapia)
Creators: name: Khobkul Nongnutch
name: Voravit Cheevaporn
name: Helander, Herbert F.
name: Nongnutch Tangkrock-Olan
Publisher: name: Thai Society of Higher Education Institutes on Environment
Year: 2011
Subjects: PAHs,EROD activity,oxygen consumption rate,fixed wavelength fluorescence,Nile tilapia

description: 1, 4, EnvironmentAsia
details on methods and supporting information on results from Female putty-nosed monkeys (Cercopithecus nictitans) vocally recruit males for predator defence
Creators: name: Mehon, Frederic Gnepa
name: Stephan, Claudia
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 170299 Cognitive Science not elsewhere classified
subject: FOS: Psychology
subject: 60801 Animal Behaviour

description: Alarm calls can trigger very different behavioural changes in receivers and signallers might apply different alarm call strategies based on their individual cost-benefit ratio. These cost-benefit ratios can also vary as a function of sex. For instance, male but not female forest guenons possess loud alarms that serve warning and predator deterrence functions, but also intergroup spacing and male–male competition. In some forest guenons, the context specificity and alarm call repertoire size additionally differs between females and males but it remains unclear if this corresponds to similar sexual dimorphisms in alarm calling strategies. We here experimentally investigated whether general female and more context-specific male alarm calls in putty-nosed monkeys (Cercopithecus nictitans) had different effects on the opposite sex' behaviour and whether they might serve different female and male alarm calling strategies. We presented a leopard model separately to the females or to the male of several groups while ensuring that the opposite sex only heard alarm calls of target individuals. While female alarms led to the recruitment of males in the majority of cases, male alarms did not have a similar effect on female behaviour. Males further seem to vocally advertise their engagement in group defence with more unspecific alarms while approaching their group. Males switched alarm call types once they spotted the leopard model and started mobbing behaviour. Females only ceased to alarm call when males produced calls typically associated with anti-predator defence, but not when males produced unspecific alarm calls. Our results suggest that sexual dimorphisms in the context specificity of alarms most likely correspond to different alarm calling strategies in female and male putty-nosed monkeys.
Analysis of polyethylene-based cold end coatings on glass : Containers with contact angle and IR spectroscopy
Creators: name: Geotti-Bianchini, Franco
name: Preo, Martina
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1999
Subjects: subject: 660

description: The aim of cold end coating is to protect the glass surface from abrasive wear with the help of a suitably anchored film of organic material which decreases friction, by preventing direct glass to glass contacts. At present, routine controls on cold end coatings are limited to a lubricity test, i.e. the determination of the slide angle. Α laboratory procedure based on the determination of the contact angle with water is described in this work. It allows one to estimate the coverage with cold end coating locally from the waterrepellence caused by the organic deposit. This method can be used to investigate a ränge of problems associated with glass wettability, including label adhesion, acid etching and washing residues. The contact angle correlates well with the slide angle. Qualitative information on the nature of cold end coatings is obtained by extracting the glass with volatile organic solvents such as methylene chloride, evaporating them and analyzing the residue with infrared spectroscopy. In the case of a coating with RP 40 LT the IR curves show the presence of Polyethylene partially oxidized in order to improve adhesion to the glass surface, besides Polyethylene glycol added as an emulsifying agent. If the cold end coated container is rinsed with water, the glycol dissolves, but the Polyethylene derivative remains strongly anchored. Such bond withstands even drastic washings with water and detergents, alkali or oxidizing acids. Even when the glass is extracted with organic solvents, only a fraction of the deposit is dissolved. Therefore, even a quantitative analysis of the IR spectrum of the extract provides values smaller than the true coverage due to incomplete extraction.
title: Axes de migration et centres de regroupement des sahéliens (saison sèche 1984-1985)
Creators: name: De Zborowski, Isolde
name: CIRAD-IEMVT-FRA
Publisher: name: CTA; CIRAD-IEMVT
Year: 1985
Subjects: subject: Pastoralisme
subject: Migration
subject: Population humaine
subject: Population animale
subject: Zébu
subject: Camelidae
subject: Facteur climatique
subject: Tchad
subject: Lac Tchad
subject: Zone soudano-sahélienne
subject: B10 - Géographie
subject: L01 - Elevage - Considérations générales
subject: B10 - Geography
subject: L01 - Animal husbandry

description: In : Élevage et potentialités pastorales sahéliennes. Synthèses cartographiques. Tchad = Animal husbandry and Sahelian pastoral potentialities. Cartographic synthesis. Chad. CIRAD-IEMVT. Wageningen : CTA-CIRAD-IEMVT. ISBN 2-85985-117-8
Modelling of liquid internal energy and heat capacity over a wide pressure-temperature range from first principles
Creators: name: Proctor, John E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Other Condensed Matter (cond-mat.other)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Recently there have been significant theoretical advances in our understanding of liquids and dense supercritical fluids based on their ability to support high frequency transverse (shear) waves. Here, we have constructed a new computer model using these recent theoretical findings (the phonon theory of liquid thermodynamics), to model liquid internal energy across a wide pressure-temperature range. We have applied it to a number of real liquids in both the subcritical regime and the supercritical regime, in which the liquid state is demarcated by the Frenkel line. Our fitting to experimental data in a wide pressure-temperature range has allowed us to test the new theoretical model with hitherto unprecedented rigour. We have quantified the degree to which the prediction of internal energy and heat capacity is constrained by the different input parameters: The liquid relaxation time (initially obtained from the viscosity), the Debye wavenumber and the infinite-frequency shear modulus. The model is successfully applied to output the internal energy and heat capacity data for several different fluids (Ar, Ne, $N_2$, Kr) over a range of densities and temperatures. We find that the predicted heat capacities are extremely sensitive to the values used for the liquid relaxation time. If these are calculated directly from the viscosity data then, in some cases, changes within the margins of experimental error in the viscosity data can cause the heat capacity to exhibit a completely different trend as a function of temperature. Our code is computationally inexpensive, and it is available for other researchers to use.
description: The following article has been accepted by Physics of Fluids, and published at https://doi.org/10.1063/5.0025871
PDSI-Based Variations of Droughts and Wet Spells in Thailand: 1951-2005
Creators: name: Atsamon Limsakul
name: Wutthichai Paengkaew
name: Atsadorn Kummueang
name: Sangchan Limjirakan
name: Boonchob Suttamanuswong
Publisher: name: Thai Society of Higher Education Institutes on Environment
Year: 2011
Subjects: Palmer Drought Severity Index,droughts,wet spells,variations,Thailand

description: 1, 4, EnvironmentAsia
Electronic properties of InAs/EuS/Al hybrid nanowires
Creators: name: Liu, Chun-Xiao
name: Schuwalow, Sergej
name: Liu, Yu
name: Vilkelis, Kostas
name: Manesco, A. L. R.
name: Krogstrup, P.
name: Wimmer, Michael
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the electronic properties of InAs/EuS/Al heterostructures as explored in a recent experiment [S. Vaitiekenas \emph{et al.}, Nat. Phys. (2020)], combining both spectroscopic results and microscopic device simulations. In particular, we use angle-resolved photoemission spectroscopy to investigate the band bending at the InAs/EuS interface. The resulting band offset value serves as an essential input to subsequent microscopic device simulations, allowing us to map the electronic wave function distribution. We conclude that the magnetic proximity effects at the Al/EuS as well as the InAs/EuS interfaces are both essential to achieve topological superconductivity at zero applied magnetic field. Mapping the topological phase diagram as a function of gate voltages and proximity-induced exchange couplings, we show that the ferromagnetic hybrid nanowire with overlapping Al and EuS layers can become a topological superconductor within realistic parameter regimes, and that the topological phase can be optimized by external gating. Our work highlights the need for a combined experimental and theoretical effort for faithful device simulation.
description: 9 pages, 6 figures
Preparation and characterization of a glass matrix composite containing aluminium titanate particles with improved thermal shock resistance
Creators: name: Boccaccini, Aldo R.
name: Pfeiffer, Kerstin
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1999
Subjects: subject: 660

description: Improving the thermal shock resistance of sintered glasses is an important task to broaden their technical and structural applications. In this study, the incorporation of second phase particles with low Young's modulus (E) into glass matrices to form composite materials is shown to be a convenient approach to increase their thermal shock resistance. Novel aluminosilicate glass matrix composites containing aluminium titanate (Al₂TiO₅) particles were fabricated by powder technology and pressureless sintering. By incorporating up to 30 vol.% of aluminium titanate particles a nearly fourfold increase of the thermal shock resistance was achieved. This was determined by measuring the critical temperature difference necessary to cause superficial cracks in cylindrical samples subjected to water-quench tests. The experimental results are shown to confirm qualitatively the theoretical prediction of the model of Hasselman et al. for the thermal shock resistance of low-E'/high-E composites.
IR-source IRAS20508+2011: spectral variability of the central star
Creators: name: Klochkova, V. G.
name: Panchuk, V. E.
name: Tavolganskaya, N. S.
name: Zhao, G.
name: .
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Over the five years of high-resolution spectroscopy of the cool star identified with the IR source IRAS20508+2011, the photospheric radial velocity variability Vr=15-30km/s is detected. In the same time, the Halpha profile varied from an intense bell-shaped emission line with a small absorption to 2-peaked emission with a central absorption feature below the continuum level. The NaD doublet lines shown a complex profile with broad (FWHM \approx 120km/s) emission and photospheric absorption, as well as an interstellar component. We used model atmospheres to determine the physical parameters and chemical composition of the star's atmosphere: Te=4800K, log g=1.5, [Fe/H]=-0.36, [O/Fe] =+1.79 (with the ratio [C/O]=-0.9). The totality of the parameters suggests that the optical component of IRAS20508+2011 is an O-rich AGB star with luminosity Mv
description: 26 pages, 4 PS-figures, 4 tables, uses A&A style
lon-exchanged versus as-melted mixed alkali glasses
Creators: name: Hara, Morihisa
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1999
Subjects: subject: 660

description: Assuming that the glass network structure containing Channels for ionic migration is established at the glass transition temperature during cooling and is perfectly rigid below this temperature, the properties of ion-exchanged and as-melted mixed alkali glasses are compared. Alkali ions introduced by ion exchange below the glass transition temperature bring the glass matrix into a State of internal strain by elastic expansion or contraction of ionic sites. In an as-melted mixed alkali glass, an ion-channel mismatch produces a similar strained State, resulting in large internal friction and the so-called thermometer effect. The change in molar volumes due to ion exchange is calculated on the basis of Eshelby's misfitting sphere theory. The molar volumes of ion-exchanged glasses calculated are close to those observed for as-melted mixed alkali glasses. The mixed alkali effect is also expected in ionexchanged mixed alkali glasses from the Standpoint of the ion-channel match model.
The WISSH QSOs project IX. Cold gas content and environment of luminous QSOs at z~2.4-4.7
Creators: name: Bischetti, M.
name: Feruglio, C.
name: Piconcelli, E.
name: Duras, F.
name: Pèrez-Torres, M.
name: Herrero, R.
name: Venturi, G.
name: Carniani, S.
name: Bruni, G.
name: Gavignaud, I.
name: Testa, V.
name: Bongiorno, A.
name: Brusa, M.
name: Circosta, C.
name: Cresci, G.
name: D'Odorico, V.
name: Maiolino, R.
name: Marconi, A.
name: Mingozzi, M.
name: Pappalardo, C.
name: Perna, M.
name: Traianou, E.
name: Travascio, A.
name: Vietri, G.
name: Zappacosta, L.
name: Fiore, F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Sources at the brightest end of QSO luminosity function during the peak epoch of star formation and black hole accretion (z~2-4, i.e. Cosmic noon) are privileged sites to study the feeding & feedback cycle of massive galaxies. We perform the first systematic study of cold gas properties in the most luminous QSOs, by characterising their host-galaxies and environment. We analyse ALMA, NOEMA and JVLA observations of FIR continuum, CO and [CII] emission lines in eight QSOs ($L_{\rm Bol}>3\times10^{47}$ erg/s) from the WISSH sample at z~2.4-4.7. We report a 100% emission line detection rate and a 80% detection rate in continuum emission, and we find CO emission to be consistent with the steepest CO ladders observed so far. Sub-mm data reveal presence of (one or more) bright companion galaxies around 80% of WISSH QSOs, at projected distances of 6-130 kpc. We observe a variety of sizes for the molecular gas reservoirs (1.7-10 kpc), associated with rotating disks with disturbed kinematics. WISSH QSOs typically show lower CO luminosity and higher star formation efficiency than FIR matched, z~0-3 main-sequence galaxies, implying that, given the observed SFR ~170-1100 $M_\odot$/yr, molecular gas is converted into stars on <50 Myr. Most targets show extreme dynamical to black-hole mass ratios $M_{\rm dyn}/M_{\rm BH}\sim3-10$, two orders of magnitude smaller than local relations. The molecular gas fraction in WISSH hosts is lower by a factor of ~10-100 than in star forming galaxies with similar $M_*$. WISSH QSOs undergo an intense growth phase of both the central SMBH and host-galaxy. They pinpoint high-density sites where giant galaxies assemble and mergers play a major role in the build-up of the final host-galaxy mass. The observed low molecular gas fraction and short depletion timescale are likely due to AGN feedback, as traced by fast AGN-driven ionised outflows in all our targets.
description: Accepted for publication in A&A
UV-VIS spectroscopic investigations of amber glass at high temperatures
Creators: name: Müller, Matthias
name: Rüssel, Christian
name: Claußen, Olaf
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1999
Subjects: subject: 660

description: The absorption spectra of iron-containing glasses and an amber glass were recorded in the temperature ränge of 25 to 700 °C. Α shift of the UV absorption edge towards lower wave numbers with increasing temperature was found. The amount of the shift depends on the Fe³⁺ concentration. Here, the UV absorption edge may superimpose or even cover up the absorption bands of colouring ions with increasing temperatures. For an amber glass sample, with increasing temperature, the intensity of the absorption bands of the amber chromophore decreases slightly. However, above 550 °C the decomposition of the chromophore is observed. All changes are reversible when temperature is decreased again. The decomposition of the chromophore and the attributed temperature ränge are in agreement with thermodynamic calculations.
Fatigue Analysis of the I-75 Bridge over the Kentucky River at Clays Ferry
Creators: name: Hopwood, Theodore
name: Oka, Vishwas G.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1988
Subjects: subject: Transportation Engineering

description: Fatigue analysis was performed on AASHTO category E welded connections on the southbound I 75 bridge over the Kentucky River at Clays Ferry, Kentucky. That analysis was based on the stress-range histogram data provided by Law Engineering of Louisville, Kentucky. That data were obtained from strain gages installed at 6 test locations on the downstream truss.  The fatigue analyses consisted of safe-life and fatigue-crack growth analyses. Safe-life predictions were based on AASHTO fatigue design (SN) curves. To use those curves, equivalent constant-amplitude stresses were derived from the stress histograms. Those stresses and loading frequencies were modified to reflect anticipated increases in traffic volume and loading over the life of the structure by appropriate multiplicative adjustment factors. Four different methods of load prediction were used with combinations of the stress summing methods, total traffic, and truck traffic. In the majority of cases, the safe-life estimates exceeded 50 years. One overly conservative load-prediction method provided safe-life estimates as low as 15 years.  Fatigue-crack growth analyses were performed at each test location using iterative crack-growth calculations by computer. The software program employed for that purpose required assumptions regarding initial and final size of the crack, crack geometry, and material properties. Analyses of hypothetical cracks at each test location was performed assuming a 1-inch initial size and a 6-inch final size. The fatigue-crack growth analyses predicted very slow growth of the cracks over that crack-length interval. For the present loading rates, those crack-length interval growth rates exceeded 350 years at all test locations.  The fatigue analyses indicated that the six test locations (gusset connections) were in a reasonably reliable condition from a fatigue standpoint to allow their continued use in the bridge over the next 50 years. Supplemental inspections, analyses and, possibly, gusset retrofits are warranted if the truss is to be retained in the new bridge. Existing cracks in the gusset connections should be repaired to preclude further crack growth.
VLT-FORS1 Imaging Polarimetry of M83 (NGC 5236) - I. Search for Light Echoes from Historical Supernovae
Creators: name: Romaniello, Martino
name: Patat, Ferdinando
name: Panagia, Nino
name: Sparks, William B.
name: Gilmozzi, Roberto
name: Spyromilio, Jason
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have used FORS1 at the ESO VLT to search for light echoes in imaging polarimetry from four historical supernovae in the face-on nearby spiral galaxy M83 (NGC 5236). No echoes were detected around our targets (SN 1923A, SN 1945B, SN 1950B and SN 1957D). This implies that the interstellar medium in their environs is rather tenuous (a few particles/cm^3), possibly as a result of previous supernova explosions that could have cleared the immediate vicinities of our targets. The merits and limitations of searching for light echoes in imaging polarimetry are discussed. From the photometry of the sources detected at the supernova locations, we estimate star cluster masses of 720, 400, 300 Mo for the cluster progenitors of SN 1957D, SN 1923A, and SN 1950B, respectively, and an upper limit of few tens of solar masses for SN 1945B.
description: Accepted for publication in the Astrophysical Journal (20 August 2005, v629). High-resolution version available at http://www.eso.org/~mromanie/m83_echoes.ps.gz
Deep traffic light detection by overlaying synthetic context on arbitrary natural images
Creators: name: de Mello, Jean Pablo Vieira
name: Tabelini, Lucas
name: Berriel, Rodrigo F.
name: Paixão, Thiago M.
name: de Souza, Alberto F.
name: Badue, Claudine
name: Sebe, Nicu
name: Oliveira-Santos, Thiago
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Deep neural networks come as an effective solution to many problems associated with autonomous driving. By providing real image samples with traffic context to the network, the model learns to detect and classify elements of interest, such as pedestrians, traffic signs, and traffic lights. However, acquiring and annotating real data can be extremely costly in terms of time and effort. In this context, we propose a method to generate artificial traffic-related training data for deep traffic light detectors. This data is generated using basic non-realistic computer graphics to blend fake traffic scenes on top of arbitrary image backgrounds that are not related to the traffic domain. Thus, a large amount of training data can be generated without annotation efforts. Furthermore, it also tackles the intrinsic data imbalance problem in traffic light datasets, caused mainly by the low amount of samples of the yellow state. Experiments show that it is possible to achieve results comparable to those obtained with real training data from the problem domain, yielding an average mAP and an average F1-score which are each nearly 4 p.p. higher than the respective metrics obtained with a real-world reference model.
Sneutrino inflation in Gauss-Bonnet brane-world cosmology, the gravitino problem and leptogenesis
Creators: name: Panotopoulos, G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss sneutrino inflation in the brane-world scenario. We work in the Randall-Sundrum type II brane-world, generalized with the introduction of the Gauss-Bonnet term, a correction to the effective action in string theories. We find that a viable inflationary model is obtained with a reheating temperature appropriate to lead to the right baryon asymmetry and render the gravitino safe for cosmology. In specific realizations we satisfy all the observational constaints without the unnaturally small Yukawa couplings required in other related approaches.
description: one reference added, submitted to Nucl.Phys.B
Privacy-preserving Travel Time Prediction with Uncertainty Using GPS Trace Data
Creators: name: Liu, Fang
name: Wang, Dong
name: Xu, Zhengquan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: The rapid growth of GPS technology and mobile devices has led to a massive accumulation of location data, bringing considerable benefits to individuals and society. One of the major usages of such data is travel time prediction, a typical service provided by GPS navigation devices and apps. Meanwhile, the constant collection and analysis of the individual location data also pose unprecedented privacy threats. We leverage the notion of geo-indistinguishability, an extension of differential privacy to the location privacy setting, and propose a procedure for privacy-preserving travel time prediction without collecting actual individual GPS trace data. We propose new concepts to examine the impact of geo-indistinguishability-based sanitization on the usefulness of GPS traces and provide analytical and experimental utility analysis for privacy-preserving travel time prediction. We also propose new metrics to measure the adversary error in learning individual GPS traces from the collected sanitized data. Our experiment results suggest that the proposed procedure provides travel time prediction with satisfactory accuracy at reasonably small privacy costs.
Approximate analytical Solutions for the heat transfer in glass melting furnaces
Creators: name: Kuhn, Wolf Stefan
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1999
Subjects: subject: 660

description: Temperatures and convections in glass melts are governed by coupled partial differential equations. These equations can, in general, only be solved by numerical methods. Α considerable simplification of the partial differential equation for heat transport is possible under certain conditions. These conditions are frequently met in glass tanks. They allow the formulation of an ordinary differential equation for the heat transport with Solutions in the form of simple equations. These equations are analytical expressions of the vertical temperature profile in the glass melt. The Peclet number for the vertical flow component in the melt under the free surface appears to be the essential parameter in these expressions. It characterizes the combined heat transport by conduction and convection. However, flow velocity and thermal diffusivity vary strongly over the depth of the glass bath, thus rendering the Peclet number Position dependent. On this theoretical basis, it follows a detailed numerical and analytical study of the dependence of the vertical temperature profile on wall heat loss, primary recirculation and pull.