cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Halophytes as Feedstock for Biogas Production: Composition Analysis and Biomethane Potential of Salicornia spp. Plant Material from Hydroponic and Seawater Irrigation Systems
Creators: name: Cayenne, Aadila
name: Turcios, Ariel E.
name: Thomsen, Mette Hedegaard
name: Rocha, Rui Miranda
name: Papenbrock, Jutta
name: Uellendahl, Hinrich
Publisher: name: Basel : MDPI
Year: 2022
Subjects: subject: anaerobic digestion
subject: biodegradability
subject: biomethane potential
subject: halophyte biomass
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: The halophyte plant species Salicornia europaea and Salicornia ramosissima were investigated for their potential to serve as a substrate for biogas production. Salicornia europaea was cultivated in hydroponic systems under varying salt concentrations (0, 10, 20, and 30 g/L NaCl), while S. ramosissima was grown in greenhouse farming with aquaculture effluent irrigation. The biomethane potential of the two halophyte feedstocks was determined through batch experiments, and correlations to the plant biochemical composition were investigated. Ash and mineral content of S. europaea was correlated to the increasing salt concentration used for plant cultivation in hydroponic systems. No indication of inhibition of the anaerobic digestion process was detected for sodium concentrations of up to 2400 mg/L in the anaerobic batch-test assays. The highest biomethane yield of S. europaea of 250 mL CH4/gVS was obtained when grown under 20 g/L NaCl and up to 300 mL CH4/gVS for S. ramosissima. By concentrating the dry matter content, the biomethane yield per ton of feedstock could be increased from 24 m3 CH4/t of the fresh halophyte plant to 74 m3 CH4/t by fractionation into a pulp fraction and to 149 m3 CH4/t by drying of the plant at room temperature for 1 week. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
Remembering Robert Elgie: a blogging academic
Creators: name: Köker, Philipp
Publisher: name: Cham, Switzerland : Springer International Publishing AG
Year: 2022
Subjects: subject: Academic blogging
subject: Presidential power
subject: Robert Elgie
subject: Semipresidentialism
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::320 | Politik

description: [No abstract available]
Phase transitions in a triangular Blume-Capel antiferromagnet
Creators: name: Žukovič, M.
name: Bobák, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the critical behavior of a frustrated Blume-Capel (BC) antiferromagnet on a triangular lattice by Monte Carlo simulations. For a reduced single-ion anisotropy strength $-1.47 \lesssim d < 0$ we find two phase transitions. The low-temperature phase is characterized by the antiferromagnetic long-range ordering (LRO) on two sublattices with the third one remaining in a non-magnetic state. At higher temperatures there is a critical region of the Berezinskii-Kosterlitz-Thouless (BKT) type with a power-law decaying spin-correlation function. For $-1.5 \le d \lesssim -1.47$, there is only one phase transition from the LRO to the paramagnetic region and the transition is of first order. The presence of the BKT phase in the current frustrated BC model is a new feature not observed in its non-frustrated counterparts. The values of the decay exponent $η$ of the BKT phase corresponding to upper and lower temperatures appear to be consistent with the theoretical predictions for the six-state clock model.
description: 19 pages, 12 figures
Flexible und robuste Wege zur Energiewende : Neue Transformationspfade zu einem nachhaltigen Energiesystem
Creators: name: Niepelt, Raphael
name: Von Haaren, Christina
name: Breitner, Michael
name: Gronau, Sven
name: Brendel, Rolf
name: Hanke-Rauschenbach, Richard
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2022
Subjects: subject: Energieversorgung
subject: Transformation
subject: Erneuerbare Energien
subject: Energiewende
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::330 | Wirtschaft::333 | Boden- und Energiewirtschaft::333,7 | Natürliche Ressourcen, Energie und Umwelt

description: [no abstract available]
Bouncing Model in Brane World Theory
Creators: name: Maier, Rodrigo
name: Pinto-Neto, Nelson
name: Soares, Ivano Damião
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We examine the nonlinear dynamics of a closed Friedmann-Robertson-Walker universe in the framework of Brane World formalism with a timelike extra dimension. In this scenario, the Friedmann equations contain additional terms arising from the bulk-brane interaction which provide a concrete model for nonsingular bounces in the early phase of the Universe. We construct a nonsingular cosmological scenario sourced with dust, radiation and a cosmological constant. The structure of the phase space shows a nonsingular orbit with two accelerated phases, separated by a smooth transition corresponding to a decelerated expansion. Given observational parameters we connect such phases to a primordial accelerated phase, a soft transition to Friedmann (where the classical regime is valid), and a graceful exit to a de Sitter accelerated phase.
Reflection and Preservation of Properties in Coalgebraic (bi)Simulations
Creators: name: Fábregas, Ignacio
name: Palomino, Miguel
name: de Frutos-Escrig, David
Publisher: name: arXiv
Year: 2024
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: Our objective is to extend the standard results of preservation and reflection of properties by bisimulations to the coalgebraic setting, as well as to study under what conditions these results hold for simulations. The notion of bisimulation is the classical one, while for simulations we use that proposed by Hughes and Jacobs. As for properties, we start by using a generalization of linear temporal logic to arbitrary coalgebras suggested by Jacobs, and then an extension by Kurtz which includes atomic propositions too.
The effect of oxide precipitates on minority carrier lifetime in n-type silicon
Creators: name: Murphy, J.D.
name: Al-Amin, M.
name: Bothe, K.
name: Olmo, M.
name: Voronkov, V.V.
name: Falster, R.J.
Publisher: name: College Park, MD : American Institute of Physics
Year: 2015
Subjects: subject: Carrier concentration
subject: Efficiency
subject: Oxygen
subject: Precipitates
subject: Semiconducting silicon
subject: Silicon
subject: Silicon nitride
subject: Silicon solar cells
subject: Concentration Measurement
subject: Czochralski silicon
subject: Internal gettering
subject: Interstitial oxygen
subject: Minority carrier lifetimes
subject: Precipitate morphology
subject: Recombination activity
subject: Surface recombinations
subject: Carrier lifetime
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Supersaturated levels of interstitial oxygen in Czochralski silicon can lead to the formation of oxide precipitates. Although beneficial from an internal gettering perspective, oxygen-related extended defects give rise to recombination which reduces minority carrier lifetime. The highest efficiency silicon solar cells are made from n-type substrates in which oxide precipitates can have a detrimental impact on cell efficiency. In order to quantify and to understand the mechanism of recombination in such materials, we correlate injection level-dependent minority carrier lifetime data measured with silicon nitride surface passivation with interstitial oxygen loss and precipitate concentration measurements in samples processed under substantially different conditions. We account for surface recombination, doping level, and precipitate morphology to present a generalised parameterisation of lifetime. The lifetime data are analysed in terms of recombination activity which is dependent on precipitate density or on the surface area of different morphologies of precipitates. Correlation of the lifetime data with interstitial oxygen loss data shows that the recombination activity is likely to be dependent on the precipitate surface area. We generalise our findings to estimate the impact of oxide precipitates with a given surface area on lifetime in both n-type and p-type silicon.
Competitive gettering of iron in silicon photovoltaics: Oxide precipitates versus phosphorus diffusion
Creators: name: Murphy, J.D.
name: McGuire, R.E.
name: Bothe, K.
name: Voronkov, V.V.
name: Falster, R.J.
Publisher: name: American Institute of Physics Inc.
Year: 2014
Subjects: subject: Defects
subject: Phosphorus
subject: Silicon
subject: Diffused layers
subject: Iron impurities
subject: Iron precipitation
subject: Minority carrier lifetimes
subject: Oxide precipitates
subject: Phosphorus diffusion
subject: Photovoltaics
subject: Quantitative information
subject: Iron
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Experiments have been conducted to understand the behaviour of iron in silicon containing oxide precipitates and associated defects (dislocations and stacking faults), which is subjected to phosphorus diffusion gettering. Injection-dependent minority carrier lifetime measurements are analysed to provide quantitative information on the degree to which the precipitates and associated defects are decorated with iron impurities. These data are correlated with bulk iron measurements based on the photodissociation of FeB pairs. Iron in the vicinity of oxide precipitates in samples with relatively low levels of bulk iron contamination (< 5 × 1012 cm−3) can be gettered to some extent. Higher levels of bulk iron contamination (> 1.2 × 1013 cm−3) result in irreversible behaviour, suggesting iron precipitation in the vicinity of oxide precipitates. Bulk iron is preferentially gettered to the phosphorus diffused layer opposed to the oxide precipitates and associated defects.
Euphrasia brevipila Burnat et Gremli
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: E.brevipila Burnat et Gremli Cat. 280 (sub E. hirtella var. brevipila). l: Les Gietes ob St-Maurice (Defago); Ravoire bei Martigny (F.). - 3: La Crevasse ob Chemin (F.). - 3a: Gondo (Becherer). - 4: Binneggen (J.); Binntal mehrfach (Binz); Umgebung von Münster (idem); Oberwald-Gletsch (Henchoz); Rhonegletscher (Schinz).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Charakterisierung von CMOS RF Blöcken mittels Volterra-Reihen zur Optimierung des Designprozesses [Characterization of CMOS RF blocks by means of Volterra rows for the optimization of the design process]
Creators: name: Fei, B.
name: Darrat, A.H.
name: Mathis, Wolfgang
Publisher: name: Göttingen : Copernicus GmbH
Year: 2009
Subjects: subject: CMOS RF
subject: Design process
subject: Volterra
subject: Electronics engineering
subject: Electrical engineering
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: Im Rahmen dieser Arbeit werden die Volterra-Reihen zur Analyse der Nichtlinearität in RF Schaltungen verwendet, um den Designprozess für RF Systeme zu optimieren. Die auf Volterra-Reihen basierende Nichtlinearitätsanalyse wurde in eine Matlab-Toolbox implementiert. Diese Toolbox kann mittels Volterra-Reihen die symbolische Berechnung der Nichtlinearitätsparameter (harmonische Verzerrungen und Intermodulationsverzerrungen) eines RF Blocks für eine gegebene Architektur und Technologie durchführen. Danach können die symbolische Ausdrücke der Nichtlinearitätsparameter in Abhängigkeit von den Architekturparametern und Technologieparametern erhalten werden. Dies ermöglicht die Beschränkung der Wertebereiche der Architekturparameter und die Überprüfung auf die Erfüllung der Nichtlinearitätsspezifikationen für unterschiedliche Kombinationen von Architekturen und Technologien. Somit ist eine Beschränkung der Klassen der Architekturen und Technologien möglich. Die Toolbox wurde zur Verdeutlichung auf einen Low Noise Amplifier (LNA) der Inductive Source Degeneration (ISD) Architektur angewandt. Zur Verifikation wurde diese LNA-Schaltung auch in Cadence SpectreRF Design Tool simuliert.
Nonparametric regression for locally stationary time series
Creators: name: Vogt, Michael
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: In this paper, we study nonparametric models allowing for locally stationary regressors and a regression function that changes smoothly over time. These models are a natural extension of time series models with time-varying coefficients. We introduce a kernel-based method to estimate the time-varying regression function and provide asymptotic theory for our estimates. Moreover, we show that the main conditions of the theory are satisfied for a large class of nonlinear autoregressive processes with a time-varying regression function. Finally, we examine structured models where the regression function splits up into time-varying additive components. As will be seen, estimation in these models does not suffer from the curse of dimensionality.
description: Published in at http://dx.doi.org/10.1214/12-AOS1043 the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Towards gravitational wave astronomy: Commissioning and characterization of GEO600
Creators: name: Hild, S.
name: Grote, H.
name: Smith, J.R.
name: Hewitson, M.
Publisher: name: Bristol : Institute of Physics Publishing
Year: 2006
Subjects: subject: gravitational wave astronomy
subject: GEO600
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: During the S4 LSC science run, the gravitational-wave detector GEO600, the first large scale dual recycled interferometer, took 30 days of continuous data. An instrumental duty cycle greater than 96% and a peak sensitivity of 7 × 10-22/√Hz around 1 kHz were achieved during this time. Detector commissioning and characterization work are essential to prepare the worldwide network of gravitational-wave detectors for future extended science runs. This paper describes the detector commissioning that was done in the run-up to S4. The focus is set on techniques used for the identification and removal of limiting noise sources. Furthermore we give some examples for the detector characterization work of GEO600.
A Search for Nucleon Decay via $n \rightarrow \barν π^{0}$ and $p \rightarrow \barν π^{+}$ in Super-Kamiokande
Creators: name: Kamiokande Collaboration
name: Abe, K.
name: Hayato, Y.
name: Iida, T.
name: Iyogi, K.
name: Kameda, J.
name: Koshio, Y.
name: Kozuma, Y.
name: Marti, Ll.
name: Miura, M.
name: Moriyama, S.
name: Nakahata, M.
name: Nakayama, S.
name: Obayashi, Y.
name: Sekiya, H.
name: Shiozawa, M.
name: Suzuki, Y.
name: Takeda, A.
name: Takenaga, Y.
name: Ueno, K.
name: Ueshima, K.
name: Yamada, S.
name: Yokozawa, T.
name: Ishihara, C.
name: Kaji, H.
name: Kajita, T.
name: Kaneyuki, K.
name: Lee, K. P.
name: McLachlan, T.
name: Okumura, K.
name: Shimizu, Y.
name: Tanimoto, N.
name: Kearns, E.
name: Litos, M.
name: Raaf, J. L.
name: Stone, J. L.
name: Sulak, L. R.
name: Goldhaber, M.
name: Bays, K.
name: Kropp, W. R.
name: Mine, S.
name: Regis, C.
name: Renshaw, A.
name: Smy, M. B.
name: Sobel, H. W.
name: Ganezer, K. S.
name: Hill, J.
name: Keig, W. E.
name: Jang, J. S.
name: Kim, J. Y.
name: Lim, I. T.
name: Albert, J. B.
name: Scholberg, K.
name: Walter, C. W.
name: Wendell, R.
name: Wongjirad, T. M.
name: Ishizuka, T.
name: Tasaka, S.
name: Learned, J. G.
name: Matsuno, S.
name: Smith, S. N.
name: Hasegawa, T.
name: Ishida, T.
name: Ishii, T.
name: Kobayashi, T.
name: Nakadaira, T.
name: Nakamura, K.
name: Nishikawa, K.
name: Oyama, Y.
name: Sakashita, K.
name: Sekiguchi, T.
name: Tsukamoto, T.
name: Suzuki, A. T.
name: Takeuchi, Y.
name: Ikeda, M.
name: Minamino, A.
name: Nakaya, T.
name: Fukuda, Y.
name: Itow, Y.
name: Mitsuka, G.
name: Tanaka, T.
name: Jung, C. K.
name: Lopez, G. D.
name: Taylor, I.
name: Yanagisawa, C.
name: Ishino, H.
name: Kibayashi, A.
name: Mino, S.
name: Mori, T.
name: Sakuda, M.
name: Toyota, H.
name: Kuno, Y.
name: Yoshida, M.
name: Kim, S. B.
name: Yang, B. S.
name: Okazawa, H.
name: Choi, Y.
name: Nishijima, K.
name: Koshiba, M.
name: Yokoyama, M.
name: Totsuka, Y.
name: Martens, K.
name: Schuemann, J.
name: Vagins, M. R.
name: Chen, S.
name: Heng, Y.
name: Yang, Z.
name: Zhang, H.
name: Kielczewska, D.
name: Mijakowski, P.
name: Connolly, K.
name: Dziomba, M.
name: Thrane, E.
name: Wilkes, R. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present the results of searches for nucleon decay via bound neutron to antineutrino plus pizero and proton to antineutrino plus piplus using data from a combined 172.8 kiloton-years exposure of Super-Kamiokande-I, -II, and -III. We set lower limits on the partial lifetime for each of these modes. For antineutrino pizero, the partial lifetime is >1.1x10^{33} years; for antineutrino piplus, the partial lifetime is >3.9x10^{32} years at 90% confidence level.
description: 6 pages, 5 figures, submitted to Physical Review Letters
Der Vitamin B1-Gehalt von Tradescantia-Blättern in Abhängigkeit von der Wellenlänge des Lichtes
Creators: name: Ruge, U.
Publisher: name: Berlin : De Gruyter
Year: 1959
Subjects: subject: Vitamin B1-Gehalt
subject: Tradescantia
subject: Biosynthese
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: Die Biosynthese von Biowuchsstoffen ist von der Wellenlänge des Lichtes abhängig. Sie wird durch den Spektralbereich > 630 mμ schwach gefördert, stärker durch den > 435 mμ und < 505 mμ; gehemmt wird dieser Prozeß dagegen durch den Bereich > 505 mμ und < 630 mμ (max. 535 mμ) sowie durch λ=395 mμ. Es besteht hier offenbar ein Zusammenhang zur Atmung.
Acceleration of Energetic Particles Through Self-Generated Waves in a Decelerating Coronal Shock
Creators: name: Battarbee, Markus
name: Laitinen, Timo
name: Vainio, Rami
name: Agueda, Neus
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: We have developed a simulation model of particle acceleration in coronal shock waves. The model is based on a Monte Carlo method, where particles are traced in prescribed large-scale electromagnetic fields utilizing the guiding center approximation. The particles are scattered in the turbulence according to quasilinear theory, with the scattering amplitude directly proportional to the intensity of Alfvén waves at gyro-resonant wavenumbers. The Alfvén waves are traced simultaneously with the particles, so that the wave field is propagated outwards from the Sun using WKB propagation supplemented with a phenomenological wavenumber diffusion term and a growth rate computed from the net flux of the accelerated particles. We consider initial wave amplitudes small enough to allow rapid escape of particles from the shock to the ambient medium. Thus, in our model the Alfvén waves responsible for the diffusive acceleration of particles are generated by the accelerated particles themselves. In this work, we study the effects of non-constant shock velocity and non-monotonic Alfvén velocity on particle acceleration scenarios. We report in particular how the deceleration of a shock affects particle intensity and turbulence power evolution in the vicinity of the shock.
description: 5 pages, 8 figures. Copyright (2010) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Twelfth International Solar Wind Conference, AIP Conference Proceedings 2010
IGSN - xây dựng và mở rộng hệ thống PID do cộng đồng dẫn dắt
Creators: name: Nghĩa, Lê Trung
Publisher: name: Zenodo
Year: 2023
Subjects: mã nhận diện thường trực (PID)
Số Mẫu Chung Quốc tế (IGSN)
Hệ thống PID do cộng đồng dẫn dắt

description: Đây là bản dịch của tài liệu 'IGSN – building and expanding a community-driven PID system' của các tác giả Pablo de Castro, Ulrich Herb, Laura Rothfritz và Joachim Schöpfel (scidecode science consulting), do Knowledge Exchange (KE) xuất bản tháng 2/2023. Bản gốc tiếng Anh có tại địa chỉ: https://doi.org/10.5281/zenodo.7330498
description: {"references": ["Pablo de Castro, Ulrich Herb, Laura Rothfritz and Joachim Sch\u00f6pfel (scidecode science consulting) (2023): IGSN \u2013 building and expanding a community-driven PID system. https://doi.org/10.5281/zenodo.7330498"]}
Calculation of proton-${}^3$He elastic scattering between 7 and 35 MeV
Creators: name: Deltuva, A.
name: Fonseca, A. C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Background: Theoretical calculations of the four-particle scattering above the four-cluster breakup threshold are technically very difficult due to nontrivial singularities or boundary conditions. Further complications arise when the long-range Coulomb force is present. Purpose: We aim at calculating proton-${}^3$He elastic scattering observables above three- and four-cluster breakup threshold. Methods: We employ Alt, Grassberger, and Sandhas (AGS) equations for the four-nucleon transition operators and solve them in the momentum-space framework using the complex-energy method whose accuracy and practical applicability is improved by a special integration method. Results: Using realistic nuclear interaction models we obtain fully converged results for the proton-${}^3$He elastic scattering. The differential cross section, proton and ${}^3$He analyzing powers, spin correlation and spin transfer coefficients are calculated at proton energies ranging from 7 to 35 MeV. Effective three- and four-nucleon forces are included via the explicit excitation of a nucleon to a $Δ$ isobar. Conclusions: Realistic proton-${}^3$He scattering calculations above the four-nucleon breakup threshold are feasible. There is quite good agreement between the theoretical predictions and experimental data for the proton-${}^3$He scattering in the considered energy regime. The most remarkable disagreements are the peak of the proton analyzing power at lower energies and the minimum of the differential cross section at higher energies. Inclusion of the $Δ$ isobar reduces the latter discrepancy.
description: Submitted to Phys. Rev. C
On the role of soft gluons in collinear parton densities
Creators: name: Mendizabal, M.
name: Guzman, Fernando
name: Jung, Hannes
name: Taheri Monfared, Sara
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2023
Subjects: parton: density
form factor: Sudakov
parton: distribution function
nonperturbative
soft collinear effective theory
gluon
DGLAP equation
transverse momentum dependence

description: The role of soft (non-perturbative) gluons in collinear parton densities is investigated with the Parton Branching method as a solution to the DGLAP evolution equations. It is found that soft gluons contribute significantly to collinear parton densities. Within the Parton Branching frame, the Sudakov form factor can be split into a perturbative and non-perturbative part. The non-perturbative part can be calculated analytically under certain conditions. It is shown that the inclusion of soft (non - perturbative) gluons to the parton density evolution is essential for the proper cancellation of divergent terms. It is argued that the non-perturbative part of the Sudakov form factor has its correspondence in Transverse Momentum Dependent parton distributions. Within the Parton Branching approach, this non-perturbative Sudakov form factor is constrained by fits of inclusive, collinear parton densities.
Formation and upper critical fields of the two distinct A15 phases in the subelements of Powder-In-Tube Nb3Sn wires
Creators: name: Senatore, Carmine
name: Flukiger, Rene
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: It is well known that the A15 layer in the subelements of a Powder-In-Tube (PIT) Nb3Sn wire exhibits two different grain morphologies: a region with fine grains (~200 nm in size) representing about 60% of the total A15 area and one with large grains (1-2 μm in size). By means of high field specific heat and magnetization measurements we have shown that these two A15 phases correspond to two distinctly different Tc distributions, the large grains region exhibiting a higher Tc and a lower Bc2, the fine grains region a lower Tc and a higher Bc2. We report here the values of the superconducting parameters (Tc, Bc2) of the two A15 phases, as determined from an original model to fit the experimental Tc distribution. After a prolonged reaction treatment (625°C/320h), an increase of the fine grain region was observed at the expenses of the large grain region, the Bc2(0K) value of the former being raised from 28.8 to 31.7 T. These changes explain the marked increase of Jc to 2'700 A/cm2 at 4.2K/12T, the highest value measured so far in PIT wires.
Repertorium Medicohistoricum Aquense II Ein Beitrag zur medizinhistorischen Topographie
Creators: name: Schmitz-Cliever, Egon
Publisher: name: Aachener Kunstblätter
Year: 2017

description: -
description: Aachener Kunstblätter, Bd. 40 (1971): Aachener Kunstblätter
Design und Analyse elektrisch kleiner Antennen für den Einsatz in UHF RFID Transpondern [Design and analysis of electrically small antennas for the use in UHF-RFID transponders]
Creators: name: Herschmann, R.
name: Camp, M.
name: Eul, H.
Publisher: name: Göttingen : Copernicus GmbH
Year: 2006
Subjects: subject: Design and analysis
subject: Electrically small antennas
subject: UHF RFID
subject: Electronics engineering
subject: Electrical engineering
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: RFID Systeme werden seit Anfang der neunziger Jahre mit stetig zunehmender Verbreitung im Bereich der automatischen Produktidentifikation, der Diebstahlsicherung (EAS, Electronic Article Surveillance) und für automatische Zutrittskontrollsysteme eingesetzt. Objekte werden hierzu mit einem Transponder ausgestattet, der aus einer Antenne und einem Chip auf einem Trägermaterial besteht. Von großem Interesse ist die Entwicklung und Optimierung von passiven Transpondern für den Einsatz in UHF RFID Systemen. Diese Transponder beziehen die Energie zum Betrieb des Chips aus dem elektromagnetischen Feld einer Schreib-Leseeinheit. Hierfür ist neben der Anpassung der Eingangsimpedanz der Antenne an die Chipimpedanz auch eine möglichst hohe Bandbreite der Antennen wünschenswert, um die Funktion des Transponders bei Schwankungen der Chipimpedanz und variablen Umgebungsparametern zu gewährleisten. Der aus Platzgründen notwendige Einsatz elektrisch kleiner Antennen bedingt eine möglichst optimale Ausnutzung der zur Verfügung stehenden Fläche auf dem Trägermaterial zur Aufnahme der Antenne. Die vorliegende Arbeit beschreibt ein Verfahren zur Analyse und Synthese neuartiger Antennendesigns auf der Basis parametrisierter meandrierter, spiralförmiger und logarithmisch periodischer Dipole.
Bernstein diffusions for a class of linear parabolic partial differential equations
Creators: name: Vuillermot, Pierre-A.
name: Zambrini, Jean-C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Analysis of PDEs (math.AP)
subject: Probability (math.PR)
subject: FOS: Mathematics

description: In this article we prove the existence of Bernstein processes which we associate in a natural way with a class of linear parabolic initial-and final boundary value problems defined in bounded convex subsets of Euclidean space of arbitrary dimension. Under certain conditions regarding their endpoint distributions, we also prove that such processes become reversible Markov diffusions. Furthermore we show that those diffusions satisfy two Itô equations for some suitably constructed Wiener processes, and from that analysis derive Feynman-Kac representations for the solutions to the given equations. We then illustrate some of our results by considering the heat equation with Neumann boundary conditions both in a one-dimensional bounded interval and in a two-dimensional disk.
Dichte- und Viskositätsmessungen an Quecksilber und hochverdünnten Kalium- und Cäsiumamalgamen vom Erstarrungspunkt bis + 30°C
Creators: name: Suhrmann, R.
name: Winter, E.-O.
Publisher: name: Berlin : De Gruyter
Year: 1955
Subjects: subject: Quecksilber
subject: Kaliumamalgam
subject: Cäsiumamalgam
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Die Temperaturabhängigkeit der Dichte und der Viskosität des Quecksilbers sowie hochverdünnter Kalium- und Cäsiumamalgame wird von 30° C bis zum Erstarrungspunkt gemessen. Der Volumen-Ausdehnungskoeffizient α ist bei Cs-Amalgamen größer als bei K-Amalgamen und nimmt von αHg beginnend proportional der Alkalimetall-Konzentration zu. Auch die spez. Volumina der Amalgame nehmen von dem des reinen Quecksilbers an proportional der Konzentration zu. Die hieraus berechneten Atomvolumen (VK) und (VCs) der beiden Alkalimetalle im Amalgam sind nur um etwa 10% verschieden und von der Konzentration unabhängig. Sie nehmen linear mit der Temperatur zu; die Volumenkontraktion δ hingegen verringert sich mit zunehmender Temperatur. — Die Temperaturabhängigkeit der Viskosität η läßt sich mit einer Genauigkeit bis zu einigen Zehntel Promille durch η = η0·eq/RT wiedergeben mit η0η0 = const; die Ansätze η0 ∾ T-1/2,η0 ∾ T1/2, η0 ∾ T ergeben größere Abweichungen. Für reines Quecksilber ist die Platzwechselenergie q = 657,9 cal, für K-Amalgam von c′ = 1,91 Atomen K in 1000 Atomen Amalgam ist qK = 714,6 cal und für gleichverdünntes Cs-Amalgam qCS = 690,4. Hieraus und aus dem Dichteverhalten wird gefolgert, daß die K-Atome eine (weniger dicht gepackte) Hg-Hülle von größerem Volumen mit sich führen als die Cs-Atome. Das Volumen φ dieser Hülle läßt sich berechnen unter Verwendung eines Ansatzes von Einstein für die Viskosität einer Lösung von größeren Kugeln in einem Medium kleinerer Kugeln. Aus der Temperaturabhängigkeit von φ erhält man die zur Abtrennung von 1 g-Atom Quecksilber erforderliche Energie ε; εκ = 278,9 cal, εCs= 359,3 cal. εκ ist kleiner als εCs, weil die Hg-Atome um die K-Atome weniger dicht gepackt sind. — Zwischen der Volumenkontraktion δ der Alkaliatome im Amalgam und φ besteht eine lineare Beziehung; δ setzt sich additiv aus einem temperaturunabhängigen und einem temperaturabhängigen Anteil zusammen. Beide Anteile kommen beim Cs-Amalgam stärker zur Geltung als beim K-Amalgam.
Multiset Bisimulations as a Common Framework for Ordinary and Probabilistic Bisimulations
Creators: name: de Frutos-Escrig, David
name: Palomino, Miguel
name: Fábregas, Ignacio
Publisher: name: arXiv
Year: 2024
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: Our concrete objective is to present both ordinary bisimulations and probabilistic bisimulations in a common coalgebraic framework based on multiset bisimulations. For that we show how to relate the underlying powerset and probabilistic distributions functors with the multiset functor by means of adequate natural transformations. This leads us to the general topic that we investigate in the paper: a natural transformation from a functor F to another G transforms F-bisimulations into G-bisimulations but, in general, it is not possible to express G-bisimulations in terms of F-bisimulations. However, they can be characterized by considering Hughes and Jacobs' notion of simulation, taking as the order on the functor F the equivalence induced by the epi-mono decomposition of the natural transformation relating F and G. We also consider the case of alternating probabilistic systems where non-deterministic and probabilistic choices are mixed, although only in a partial way, and extend all these results to categorical simulations.
Euphrasia drosocalyx Freyn
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: E. drosocalyx Freyn Alpweiden,Zwergstrauchheiden. l: Col de Balme (Gerhard, nach Wettstein). - 2: Ob Ayent (P.). -3: Ob Zinal, Crete de Barneusa und Umgebung des Roc de la Vache (Sulger).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Observing Extended Sources with the \Herschel SPIRE Fourier Transform Spectrometer
Creators: name: Wu, Ronin
name: Polehampton, Edward T.
name: Etxaluze, Mireya
name: Makiwa, Gibion
name: Naylor, David A.
name: Salji, Carl
name: Swinyard, Bruce M.
name: Ferlet, Marc
name: van der Wiel, Matthijs H. D.
name: Smith, Anthony J.
name: Fulton, Trevor
name: Griffin, Matt J.
name: Baluteau, Jean-Paul
name: Benielli, Dominique
name: Glenn, Jason
name: Hopwood, Rosalind
name: Imhof, Peter
name: Lim, Tanya
name: Lu, Nanyao
name: Panuzzo, Pasquale
name: Pearson, Chris
name: Sidher, Sunil
name: Valtchanov, Ivan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Spectral and Photometric Imaging Receiver (SPIRE) on the European Space Agency's Herschel Space Observatory utilizes a pioneering design for its imaging spectrometer in the form of a Fourier Transform Spectrometer (FTS). The standard FTS data reduction and calibration schemes are aimed at objects with either a spatial extent much larger than the beam size or a source that can be approximated as a point source within the beam. However, when sources are of intermediate spatial extent, neither of these calibrations schemes is appropriate and both the spatial response of the instrument and the source's light profile must be taken into account and the coupling between them explicitly derived. To that end, we derive the necessary corrections using an observed spectrum of a fully extended source with the beam profile and the source's light profile taken into account. We apply the derived correction to several observations of planets and compare the corrected spectra with their spectral models to study the beam coupling efficiency of the instrument in the case of partially extended sources. We find that we can apply these correction factors for sources with angular sizes up to θ_{D} ~ 17". We demonstrate how the angular size of an extended source can be estimated using the difference between the sub-spectra observed at the overlap bandwidth of the two frequency channels in the spectrometer, at 959
description: Accepted for publication by A&A
Das alamannische Reihengräberfeld bei Schretzheim, BA. Dillingen in Bayerisch-Schwaben
Creators: name: Zenetti, Paul
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2017

description: [nicht erschienen / not available]
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 19, Nr. 4 (1935)
Die Dissoziation des Schwefeldampfes
Creators: name: Braune, H.
name: Peter, S.
name: Neveling, V.
Publisher: name: Berlin : De Gruyter
Year: 1951
Subjects: subject: Schwefeldampf
subject: Schwefel
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Die Dissoziationsverhältnisse im Schwefeldampf wurden durch sorgfältige Messungen nachgeprüft. Dabei ergab sich, daß die Deutung der Versuchsergebnisse im Gegensatz zu der bisherigen Annahme nur unter Berücksichtigung der Molekülart S4 möglich ist. Aus den Ergebnissen wurden die Wärmetönungen der verschiedenen Dissoziationsreaktionen sowie der thermodynamisch wichtigen Reaktion Srhomb⇄S2Dampf berechnet.
Non-strongly Stable Orders Also Define Interesting Simulation Relations
Creators: name: Fábregas, Ignacio
name: de Frutos-Escrig, David
name: Palomino, Miguel
Publisher: name: arXiv
Year: 2024
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: We present a study of the notion of coalgebraic simulation introduced by Hughes and Jacobs. Although in their original paper they allow any functorial order in their definition of coalgebraic simulation, for the simulation relations to have good properties they focus their attention on functors with orders which are strongly stable. This guarantees a so-called "composition-preserving" property from which all the desired good properties follow. We have noticed that the notion of strong stability not only ensures such good properties but also "distinguishes the direction" of the simulation. For example, the classic notion of simulation for labeled transition systems, the relation "p is simulated by q", can be defined as a coalgebraic simulation relation by means of a strongly stable order, whereas the opposite relation, "p simulates q", cannot. Our study was motivated by some interesting classes of simulations that illustrate the application of these results: covariant-contravariant simulations and conformance simulations.
Die Dissoziation des Schwefeldampfes II
Creators: name: Braune, H.
name: Steinbacher, E.
Publisher: name: Berlin : De Gruyter
Year: 1952
Subjects: subject: Schwefeldampf
subject: Schwefel
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Bei der spektralphotometrischen Untersuchung der im sichtbaren Teil des Spektrums liegenden Absorptionsbanden des Schwefeldampfes wurde ein Kontinuum gefunden, das sein Maximum bei 5100 Å hat. Seine Intensität bei dieser Wellenlänge wurde unter systematischer Variation von Druck und Temperatur mit der Druck-und Temperaturabhängigkeit der molaren Konzentrationen der verschiedenen im Schwefeldampf vorkommenden Molekülartenverglichen. Es ergab sich, daß die Intensität gut parallel geht mit der nach Braune, Peter und Neveling berechneten Konzentration des S4-Moleküls. Damit ist erwiesen, daß die von Preuner und Schupp angenommenen Molekülarten S8, S6 und S2 nicht ausreichen, um den Dampfzustand des Schwefels zu beschreiben, die Molekülart S4 tritt ebenfalls in meßbaren Konzentrationen auf. Das diffuse Bandensystem im kurzwelligen Teil des sichtbaren Spektrums kann nach dem Ergebnis dieserArbeit nicht dem S2 zugeordnet werden, sondern dürfte gleichfalls dem S4-Molekül zugehören.
Schenkung der Fliesenkeramik für das Couven-Museum durch das Stifterehepaar Irene und Peter Ludwig
Creators: name: Grimme, Ernst Günther
Publisher: name: Aachener Kunstblätter
Year: 2017

description: -
description: Aachener Kunstblätter, Bd. 52 (1984): Aachener Kunstblätter
Trapped Atoms in One-Dimensional Photonic Crystals
Creators: name: Hung, C. -L.
name: Meenehan, S. M.
name: Chang, D. E.
name: Painter, O.
name: Kimble, H. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We describe one-dimensional photonic crystals that support a guided mode suitable for atom trapping within a unit cell, as well as a second probe mode with strong atom-photon interactions. A new hybrid trap is analyzed that combines optical and Casimir-Polder forces to form stable traps for neutral atoms in dielectric nanostructures. By suitable design of the band structure, the atomic spontaneous emission rate into the probe mode can exceed the rate into all other modes by more than tenfold. The unprecedented single-atom reflectivity $r_0 \gtrsim 0.9$ for the guided probe field should enable diverse investigations of photon-mediated interactions for 1D atom chains and cavity QED.
description: 7 pages with 5 figures
Die UV-Absorptionsspektren einiger einfacher Chinoxalin-Derivate
Creators: name: Perkampus, H.H.
Publisher: name: Berlin : De Gruyter
Year: 1962
Subjects: subject: Chinoxalin-Derivate
subject: 1L-Banden
subject: UV-Absorptionsspektren
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Die UV-Absorptionsspektren 13 einfacher Chinoxalin-Derivate, bei denen die Substituenten keinen Anlaß zu tautomeren Wechselwirkungen geben, wurden in verschiedenen Lösungsmitteln gemessen und diskutiert. An Hand der Feinstruktur der UV-Absorptionsspektren der 2.3-Di-methoxy- und iso-propoxy-Derivate und deren Fluoreszenzspektren sowie der Lösungsmittelabhängigkeit aller Absorptionsspektren wird versucht, eine Zuordnung der langwelligen, überlagerten 1L-Banden zu treffen. © 1962, Walter de Gruyter. Alle Rechte vorbehalten.
Stimulierte Raman-Prozesse zur Anwendung in der Bildgebung
Creators: name: Hoffmann, Claudia
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2014
Subjects: subject: Nonlinear Raman scattering
subject: coherent anti-Stokes Raman scattering
subject: stimulated Raman scattering
subject: optical coherence tomography
subject: multimodal imaging
subject: microfluidic components
subject: Nichtlineare Raman-Streuung
subject: kohärente Anti-Stokes Raman-Streuung
subject: stimulierte Raman-Streuung
subject: optische Kohärenz-Tomographie
subject: multimodale Bildgebung
subject: mikrofluidische Komponenten
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
Limits on compact halo objects as dark matter from gravitational microlensing
Creators: name: Jetzer, Philippe
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Microlensing started with the seminal paper by Paczyński in 1986, first with observations towards the Large Magellanic Cloud and the galactic bulge. Since then many other targets have been observed and new applications have been found. In particular, it turned out to be a powerful method to detect planets in our galaxy and even in the nearby M31. Here, we will present some results obtained so far by microlensing without being, however, exhaustive.
description: 9 pages, 5 figures, to appear in the proceedings of the 1st International Conference on New Frontiers in Physics, Kolymbari, Crete, June 2012
Untersuchungen zum Einsatz von Lasertechnologie in der Pflanzenproduktion
Creators: name: Marx, Christian
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2014
Subjects: subject: Laser application
subject: weed control
subject: pest control
subject: product marking
subject: parameter studies
subject: Lasertechnik
subject: Unkrautbekämpfung
subject: Schädlingsbekämpfung
subject: Produktmarkierung
subject: Parameterstudien
subject: Dewey Decimal Classification::600 | Technik::630 | Landwirtschaft, Veterinärmedizin
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: [no abstract]
Some weak versions of the $M_{1}$-spaces
Creators: name: Lin, Fucai
name: Lin, Shou
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: 54B10, 54C05, 54D30

description: We mainly introduce some weak versions of the $M_{1}$-spaces, and study some properties about these spaces. The mainly results are that: (1) If $X$ is a compact scattered space and $i(X)\leq 3$, then $X$ is an $s$-$m_{1}$-space; (2) If $X$ is a strongly monotonically normal space, then $X$ is an $s$-$m_{2}$-space; (3) If $X$ is a $σ$-$m_{3}$ space, then $t(X)\leq c(X)$, which extends a result of P.M. Gartside in \cite{CP}. Moreover, some questions are posed in the paper.
description: 8 pages
Logics for Contravariant Simulations
Creators: name: Fábregas, Ignacio
name: de Frutos-Escrig, David
name: Palomino, Miguel
Publisher: name: arXiv
Year: 2024
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: Covariant-contravariant simulation and conformance simulation are two generalizations of the simple notion of simulation which aim at capturing the fact that it is not always the case that "the larger the number of behaviors, the better". Therefore, they can be considered to be more adequate to express the fact that a system is a correct implementation of some specification. We have previously shown that these two more elaborated notions fit well within the categorical framework developed to study the notion of simulation in a generic way. Now we show that their behaviors have also simple and natural logical characterizations, though more elaborated than those for the plain simulation semantics.
Drainage in a model stratified porous medium
Creators: name: Datta, Sujit S.
name: Weitz, David A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We show that when a non-wetting fluid drains a stratified porous medium at sufficiently small capillary numbers Ca, it flows only through the coarsest stratum of the medium; by contrast, above a threshold Ca, the non-wetting fluid is also forced laterally, into part of the adjacent, finer strata. The spatial extent of this partial invasion increases with Ca. We quantitatively understand this behavior by balancing the stratum-scale viscous pressure driving the flow with the capillary pressure required to invade individual pores. Because geological formations are frequently stratified, we anticipate that our results will be relevant to a number of important applications, including understanding oil migration, preventing groundwater contamination, and sub-surface CO$_{2}$ storage.
Einfluss stark nichtlinearer Materialeigenschaften auf die induktive Längsfelderwärmung
Creators: name: Jestremski, Marcel
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2014
Subjects: subject: Induction heating
subject: longitudinal magnetic flux
subject: nonlinear material properties
subject: Induktive Erwärmung
subject: magnetisches Längsfeld
subject: nichtlineare Materialeigenschaften
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
Untersuchungen zur Tribologie und zum Benetzungsverhalten von Elastomerkompositen
Creators: name: Karl, Christian Wolfgang
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2014
Subjects: subject: Elastomer composites
subject: nanomaterials
subject: friction coefficient
subject: contact angle
subject: modified Wilhelmy method
subject: sol-gel technique
subject: sliding lacquer
subject: graphene
subject: Elastomerkomposite
subject: Nanomaterialien
subject: Reibkoeffizient
subject: Kontaktwinkel
subject: modifizierte Wilhelmy Methode
subject: Tribometer
subject: Sol-Gel-Technik
subject: Gleitlacke
subject: Graphen
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: [no abstract]