cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Critical behavior at the interface between two systems belonging to different universality classes
Creators: name: Bagamery, F. A.
name: Turban, L.
name: Igloi, F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider the critical behavior at an interface which separates two semi-infinite subsystems belonging to different universality classes, thus having different set of critical exponents, but having a common transition temperature. We solve this problem analytically in the frame of mean-field theory, which is then generalized using phenomenological scaling considerations. A large variety of interface critical behavior is obtained which is checked numerically on the example of two-dimensional q-state Potts models with q=2 to 4. Weak interface couplings are generally irrelevant, resulting in the same critical behavior at the interface as for a free surface. With strong interface couplings, the interface remains ordered at the bulk transition temperature. More interesting is the intermediate situation, the special interface transition, when the critical behavior at the interface involves new critical exponents, which however can be expressed in terms of the bulk and surface exponents of the two subsystems. We discuss also the smooth or discontinuous nature of the order parameter profile.
description: 16 pages, 9 figures, published version, minor changes, some references added
Identification of a Scalar Glueball
Creators: name: Albaladejo, M.
name: Oller, J. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We have performed a coupled channel study of the meson-meson S-waves involving isospins (I) 0, 1/2 and 3/2 up to 2 GeV. For the first time the channels ππ, K\bar{K}, ηη, σσ, ηη', η'η', ρρ, ωω, ωϕ$, ϕϕ, a_1πand π^*πare considered. All the resonances with masses below 2 GeV for I=0 and 1/2 are generated by the approach. We identify the f_0(1710) and a pole at 1.6 GeV, which is an important contribution to the f_0(1500), as glueballs. This is based on an accurate agreement of our results with predictions of lattice QCD and the chiral suppression of the coupling of a scalar glueball to \bar{q}q. Another nearby pole, mainly corresponding to the f_0(1370), is a pure octet state not mixed with the glueball.
description: 5 pages, 1 figure. More data are included and reproduced. Some discussions have been rephrased
title: A Bank Gravel Base Containing Calcium Chloride
title: [Report No. 2]
titleType: Subtitle
Creators: name: Drake, William B.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1952
Subjects: subject: Transportation Engineering

description: Attached you will find our second progress report on "A Bank Gravel Base Containing Calcium Chloride," by W.B. Drake. This project pertains to that portion of the Paducah-Eddyville Road (U.S. 62) extending from Kentucky Dam to Kuttawa. You are quite familiar with the road having visited it in company with Mr. Bray on August 13, this year and I believe most of the members of the Research Committee are familiar with it. Discussions following presentation of Report No. 1 on the project at our meeting last April would have accomplished that, but the road is better known for the number of failures that developed within the first year after its construction.
An MPI-based parallel genetic algorithm for multiple geographical feature label placement based on the hybrid of fixed-sliding models
Creators: name: Lessani, M. Naser
name: Li, Zhenlong
name: Deng, Jiqiu
name: Guo, Zhiyong
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biochemistry
subject: Space Science
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Information Systems not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Mental Health
subject: Virology
subject: Computational Biology

description: Multiple Geographical Feature Label Placement (MGFLP) has been a fundamental problem in geographic information visualization for decades. Moreover, the nature of label positioning has proven to be an Nondeterministic polynomial-time hard (NP-hard) problem. Although advances in computer technology and robust approaches have addressed the problem of label positioning, the lengthy running time of MGFLP has not been a major focus of recent studies. Based on a hybrid of the fixed-position and sliding models, a Message Passing Interface (MPI) parallel genetic algorithm is proposed in the present study for MGFLP to label mixed types of geographical features. To evaluate the quality of label placement, a quality function is defined based on four quality metrics: label-feature conflict; label-label conflict; label association with the corresponding feature; label position priority for all three types of features. The experimental results show that the proposed algorithm outperforms the DDEGA, DDEGA-NM, and Parallel-MS in both label placement quality and computation time efficiency. Across three datasets, compared to Parallel-MS, running times decreased from 118.45 to 8.34, 45.98 to 3.51, and 20.01 to 0.43 min, with further reductions in label-label and label-feature conflicts.
Evaluation of optical and microwave-derived vegetation indices for monitoring aboveground biomass over China
Creators: name: Chang, Zhongbing
name: Fan, Lei
name: Wigneron, Jean-Pierre
name: Wang, Ying-Ping
name: Li, Xiaojun
name: Wang, Mengjia
name: Liu, Xiangzhuo
name: Wang, Huan
name: Cui, Tianxiang
name: Yu, Ling
name: Wu, Jianping
name: Xiong, Xin
name: Zhang, Shuo
name: Tang, Xuli
name: Yan, Junhua
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Science Policy
subject: Plant Biology
subject: FOS: Biological sciences

description: The microwave-derived vegetation optical depth (VOD) products were used to monitor aboveground biomass (AGB) at regional to global scales, but the ability of VOD to monitor AGB in China is uncertain. This study evaluated the sensitivity of four VOD products (e.g. L-VOD, IB-VOD, LPDR-VOD, and Liu-VOD) and optical vegetation indices (VI) (e.g. NDVI, EVI, LAI, and tree cover from MODIS) to the AGB across China. Our results showed tree cover product has the highest spatial agreement with reference AGBs (indicated by the median correlation value of 0.85), followed by L-VOD (with a median correlation value of 0.80), which performs better than other VIs and VODs. Further comparisons between reference and estimated AGB computed using the fitted logistic regression showed that AGB estimations from tree cover and L-VOD outperformed the estimations from other VIs and VODs over most vegetation types (except forest), indicated by the higher median correlation value of 0.86 and 0.83 and lower RMSD of 23.9 and 27.3 Mg/ha, respectively. The good performance of tree cover could be partly due to that tree cover product is not independent from the reference AGBs. The good performance of L-VOD can be explained by its higher sensitivity to the vegetation characteristics of the entire canopy (including woody component), relative to other VODs and VIs. Among the six reference AGB products, Saatchi-WT and Saatchi-RF products were found to have the best correlations with VIs and VODs. This study demonstrates that microwave VODs, particularly L-VOD, are effective proxies for large-scale monitoring of vegetation AGB in China.
Experimental Evaluation of Vibration Influence on a Resonant MEMS Scanning System for Automotive Lidars
Creators: name: Yoo, Han Woong
name: Riegler, Rene
name: Brunner, David
name: Albert, Stephan
name: Thurner, Thomas
name: Schitter, Georg
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: Signal Processing (eess.SP)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Physical sciences

description: This paper demonstrates a vibration test for a resonant MEMS scanning system in operation to evaluate the vibration immunity for automotive lidar applications. The MEMS mirror has a reinforcement structure on the backside of the mirror, causing vibration coupling by a mismatch between the center of mass and the rotation axis. An analysis of energy variation is proposed, showing direction dependency of vibration coupling. Vibration influences are evaluated by transient vibration response and vibration frequency sweep using a single tone vibration for translational y- and z- axis. The measurement results demonstrate standard deviation (STD) amplitude and frequency errors are up to 1.64 % and 0.26 %, respectively, for 2 grms single tone vibrations on y axis. The simulation results also show a good agreement with both measurements, proving the proposed vibration coupling mechanism of the MEMS mirror. The phased locked loop (PLL) improves the STD amplitude and frequency errors to 0.91 % and 0.15 % for y axis vibration, corresponding to 44.4 % and 43.0 % reduction, respectively, showing the benefit of a controlled MEMS mirror for reliable automotive MEMS lidars.
description: 9 pages, 11 figures, to be published in IEEE Transactions on Industrial Electronics
Space-time dependent couplings in N=1 SUSY gauge theories: Anomalies and Central Functions
Creators: name: Babington, James
name: Erdmenger, Johanna
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider N=1 supersymmetric gauge theories in which the couplings are allowed to be space-time dependent functions. Both the gauge and the superpotential couplings become chiral superfields. As has recently been shown, a new topological anomaly appears in models with space-time dependent gauge coupling. Here we show how this anomaly may be used to derive the NSVZ beta function in a particular, well-determined renormalisation scheme, both without and with chiral matter. Moreover we extend the topological anomaly analysis to theories coupled to a classical curved superspace background, and use it to derive an all-order expression for the central charge c, the coefficient of the Weyl tensor squared contribution to the conformal anomaly. We also comment on the implications of our results for the central charge a expected to be of relevance for a four-dimensional C-theorem.
description: 28 pages, LaTeX, no figures
THE WORLD FOOD SITUATION
Creators: name: Schuh, G. Edward
name: Schuh, G. Edward
Publisher: name: Unknown
Year: 1984
Subjects: Food Security and Poverty

description: My paper is divided in two parts. In the first I will attempt to provide a brief overview of the world food situation, with an emphasis on what has happened during the 1970's - the decade when many observers thought we were headed for a Malthusian crisis. In the second part I will discuss the factors likely to affect the world food situation in the 1980's and beyond.
Entanglement in Interactive Proof Systems with Binary Answers
Creators: name: Wehner, Stephanie
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: Computational Complexity (cs.CC)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: If two classical provers share an entangled state, the resulting interactive proof system is significantly weakened [quant-ph/0404076]. We show that for the case where the verifier computes the XOR of two binary answers, the resulting proof system is in fact no more powerful than a system based on a single quantum prover: +MIP*[2] is contained in QIP(2). This also implies that +MIP*[2] is contained in EXP which was previously shown using a different method [Presentation of Cleve et al. at CCC'04]. This contrasts with an interactive proof system where the two provers do not share entanglement. In that case, +MIP[2] = NEXP for certain soundness and completeness parameters [quant-ph/0404076].
description: 10 pages, LaTeX, To appear at STACS 2006
Covariant calculation of mesonic baryon decays
Creators: name: Melde, T.
name: Plessas, W.
name: Wagenbrunn, R. F.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present covariant predictions for pi and eta decay modes of N and Delta resonances from relativistic constituent-quark models based on one-gluon-exchange and Goldstone-boson-exchange dynamics. The results are calculated within the point-form approach to Poincare-invariant relativistic quantum mechanics applying a spectator-model decay operator. The direct predictions of the constituent-quark models for covariant pi and eta decay widths show a behaviour completely different from previous ones calculated in nonrelativistic or so-called semirelativistic approaches. It is found that the present theoretical results agree with experiment only in a few cases but otherwise always remain smaller than the experimental data (as compiled by the Particle Data Group). Possible reasons for this behaviour are discussed with regard to the quality of both the quark-model wave functions and the mesonic decay operator.
description: 10 pages, 2 figures, accepted for publication in Phys. Rev. C
Collective Rotation of Tetrahedral Nuclei in the Cranking Model
Creators: name: Schunck, N.
name: Olbratowski, P.
name: Dudek, J.
name: Dobaczewski, J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The three-dimensional cranking model is used to investigate the microscopic aspects of the rotation of nuclei with the tetrahedral symmetry. Two classes of rotation axes are studied corresponding to two different discrete symmetries of the rotating hamiltonian. Self-consistent Hartree-Fock-Bogoliubov calculations show that the tetrahedral minimum remains remarkably stable until the first single-particle crossing.
description: Proceedings of the XII Nuclear Physics Workshop Pierre and Marie Curie, October 2005. To be published in IJMPE
Nanopores in atomically thin 2D nanosheets limit aqueous ssDNA transport
Creators: name: Smolyanitsky, Alex
name: Luan, Binquan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Nanopores in 2D materials are highly desirable for DNA sequencing, yet achieving single-stranded DNA (ssDNA) transport through them is challenging. Using density functional theory calculations and molecular dynamics simulations we show that ssDNA transport through a pore in monolayer hexagonal boron nitride (hBN) is marked by a basic nanomechanical conflict. It arises from the notably inhomogeneous flexural rigidity of ssDNA and causes high friction $\textit{via}$ transient DNA desorption costs exacerbated by solvation effects. For a similarly sized pore in bilayer hBN, its self-passivated atomically smooth edge enables continuous ssDNA transport. Our findings shed light on the fundamental physics of biopolymer transport through pores in 2D materials.
description: 6 pages, 5 figures
Quantum Network Coding
Creators: name: Hayashi, Masahito
name: Iwama, Kazuo
name: Nishimura, Harumichi
name: Raymond, Rudy
name: Yamashita, Shigeru
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Since quantum information is continuous, its handling is sometimes surprisingly harder than the classical counterpart. A typical example is cloning; making a copy of digital information is straightforward but it is not possible exactly for quantum information. The question in this paper is whether or not quantum network coding is possible. Its classical counterpart is another good example to show that digital information flow can be done much more efficiently than conventional (say, liquid) flow. Our answer to the question is similar to the case of cloning, namely, it is shown that quantum network coding is possible if approximation is allowed, by using a simple network model called Butterfly. In this network, there are two flow paths, s_1 to t_1 and s_2 to t_2, which shares a single bottleneck channel of capacity one. In the classical case, we can send two bits simultaneously, one for each path, in spite of the bottleneck. Our results for quantum network coding include: (i) We can send any quantum state |psi_1> from s_1 to t_1 and |psi_2> from s_2 to t_2 simultaneously with a fidelity strictly greater than 1/2. (ii) If one of |psi_1> and |psi_2> is classical, then the fidelity can be improved to 2/3. (iii) Similar improvement is also possible if |psi_1> and |psi_2> are restricted to only a finite number of (previously known) states. (iv) Several impossibility results including the general upper bound of the fidelity are also given.
description: 27pages, 11figures. The 12page version will appear in 24th International Symposium on Theoretical Aspects of Computer Science (STACS 2007)
ECONOMIC ADJUSTMENT, AGRICULTURE AND THE LABOR MARKET IN UGANDA
Creators: name: Vanegas Sr., Manuel
name: Vanegas Sr., Manuel
Publisher: name: Unknown
Year: 1994
Subjects: International Development
Labor and Human Capital

description: This paper investigates the scale of the economic crisis in Uganda and the impacts on agriculture, identifies the major labour market changes and explores selected policy measures to attack on rural-urban unemployment. Section II, starts from the scale of the crisis and the need to adjust the Ugandan economy to overcome the resurgence of unemployment. In Section III, the costs of adjustment and rural-urban migration are presented. Policy measures to attack rural-urban unemployment are presented in section IV.
Control-limited perfect state transfer, quantum stochastic resonance and many-body entangling gate in imperfect qubit registers
Creators: name: Di Franco, C.
name: Paternostro, M.
name: Tsomokos, D. I.
name: Huelga, S. F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a protocol for perfect quantum state transfer that is resilient to a broad class of realistic experimental imperfections, including noise sources that could be modelled either as independent Markovian baths or as certain forms of spatially correlated environments. We highlight interesting connections between the fidelity of state transfer and quantum stochastic resonance effects. The scheme is flexible enough to act as an effective entangling gate for the generation of genuine multipartite entanglement in a control-limited setting. Possible experimental implementations using superconducting qubits are also briefly discussed.
description: 10 pages, 9 figures, RevTeX4
Galactic factories of cosmic-ray electrons and positrons
Creators: name: Evoli, Carmelo
name: Amato, Elena
name: Blasi, Pasquale
name: Aloisio, Roberto
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a novel calculation of the spectrum of electrons and positrons from random sources, supernova remnants and pulsars, distributed within the spiral arms of the Galaxy. The pulsar emissivity in terms of electron-positron pairs is considered as time dependent, following the magnetic dipole spin-down luminosity, and the temporal evolution of the potential drop is accounted for. Moreover each pulsar, with the magnetic field and initial spin period selected at random from the observed distribution, is considered as a source of pairs only after it leaves the parent supernova due to its birth kick velocity (also selected at random from the observed distribution). We show that (i) the spectrum of electrons is characterized by a feature at $\gtrsim 50$ GeV that proves that their transport is dominated by radiative losses. The flux reduction at $E\gtrsim 1$ TeV is explained as a result of lepton transport from sources in the spiral arms. (ii) The spectrum of positrons is very well described by the contribution of pulsars and the rising positron fraction originates naturally. The implications of pulsars as positron sources in terms of positron fraction at very high energies are also discussed. (iii) The role of fluctuations in the high-energy regime is thoroughly discussed and used to draw conclusions on the possibility to single out the contribution of local sources to the lepton spectrum with current and upcoming experiments.
description: 25 pages, 13 figures. Accepted for publication on PRD
Constraining global properties of the Draco dwarf spheroidal galaxy
Creators: name: Mashchenko, Sergey
name: Sills, Alison
name: Couchman, H. M. P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: By fitting a flexible stellar anisotropy model to the observed surface brightness and line-of-sight velocity dispersion profiles of Draco we derive a sequence of cosmologically plausible two-component (stars + dark matter) models for this galaxy. The models are consistent with all the available observations and can have either cuspy Navarro-Frenk-White or flat-cored dark matter density profiles. The dark matter halos either formed relatively recently (at z~2...7) and are massive (up to ~5x10^9 M_Sun), or formed before the end of the reionization of the universe (z~7...11) and are less massive (down to ~7x10^7 M_Sun). Our results thus support either of the two popular solutions of the "missing satellites" problem of Lambda cold dark matter cosmology - that dwarf spheroidals are either very massive, or very old. We carry out high-resolution simulations of the tidal evolution of our two-component Draco models in the potential of the Milky Way. The results of our simulations suggest that the observable properties of Draco have not been appreciably affected by the Galactic tides after 10 Gyr of evolution. We rule out Draco being a "tidal dwarf" - a tidally disrupted dwarf galaxy. Almost radial Draco orbits (with the pericentric distance <15 kpc) are also ruled out by our analysis. The case of a harmonic dark matter core can be consistent with observations only for a very limited choice of Draco orbits (with the apocentric-to-pericentric distances ratio of <2.5).
description: 18 pages, 14 figures; accepted by ApJ
The Information Geometry of Space and Time
Creators: name: Caticha, Ariel
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Is the geometry of space a macroscopic manifestation of an underlying microscopic statistical structure? Is geometrodynamics - the theory of gravity - derivable from general principles of inductive inference? Tentative answers are suggested by a model of geometrodynamics based on the statistical concepts of entropy, information geometry, and entropic dynamics. The model shows remarkable similarities with the 3+1 formulation of general relativity. For example, the dynamical degrees of freedom are those that specify the conformal geometry of space; there is a gauge symmetry under 3d diffeomorphisms; there is no reference to an external time; and the theory is time reversible. There is, in adition, a gauge symmetry under scale transformations. I conjecture that under a suitable choice of gauge one can recover the usual notion of a relativistic space-time.
description: Presented at the 25th International Workshop on Maximum Entropy and Bayesian Methods in Science and Engineering (San Jose, California, August. 2005). The revised version 2 contains minor revisions of language and punctuation
An urban building use identification framework based on integrated remote sensing and social sensing data with spatial constraints
Creators: name: Xie, Zhiwei
name: Wu, Yifan
name: Ma, Zaiyang
name: Chen, Min
name: Qian, Zhen
name: Zhang, Fengyuan
name: Sun, Lishuang
name: Peng, Bo
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Space Science
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy

description: Building use identification is crucial in urban planning and management. Current identification methods often rely on a single data source and neglect spatial proximity. In this paper, we propose a stepwise urban building use identification framework that integrates remote sensing and social sensing data with spatial constraints based on the association of buildings with Point of Interest (POI), Area of Interest (AOI) and remote sensing data. First, the study data are preprocessed using geometric correction and POI and AOI reclassification. Then, we identify buildings with the quantitative-density index of the POIs as well as the spatial relationships between the AOIs and the buildings. Next, we generate Traffic Analysis Zones (TAZs) from road network data and utilize the similarity in physical features of buildings from remote sensing data to identify building use within spatial constraints. Finally, POI kernel density estimation is used to determine the semantic features of the buildings, and the similarity of the features between the buildings is utilized to identify the remaining buildings. The specificity of our proposed framework lies not only in the combination of multiple source data at the building-level but also in the introduction of the spatial relationships of AOIs and spatial constraints. Shenyang is selected as an example. The proposed framework identifies buildings as commercial, residential, industrial, public service and scenic spots. The accuracy assessment indicates that the proposed framework performs well, with an Overall Accuracy (OA) of 87.1% and a kappa coefficient (kappa) of 73.4%. The results of the comparison experiments show that the consideration of spatial constraints and the integration of multiple data sources help to improve the accuracy of building use identification. The proposed framework provides a new tool for better identification of urban building use, and the generated data are suitable for in-depth analyses such as building-level urban heat islands.
Hole redistribution in Sr\_(14-x)Ca\_xCu\_24O\_41 (x = 0, 12) spin ladder compounds: ^63Cu and ^17O NMR study under pressure
Creators: name: Piskunov, Y.
name: Jérome, D.
name: Auban-Senzier, P.
name: Wzietek, P.
name: Yakubovsky, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report the results of a ^63Cu and ^17O NMR study of the nuclear quadrupole interaction tensor, ^(17,63)nu\_{Q,alpha}, in the hole doped spin ladder system Sr\_(14-x)Ca\_xCu\_24O\_41 (x = 0 and 12) performed under ambient and high pressures. NMR data show that the hole density in the Cu\_2O\_3 ladder layer grows with temperature, Ca content and an applied pressure. We have derived the hole occupation of Cu 3d and O 2p orbitals at the different ion sites in the Cu\_2O\_3 ladder as a function of the temperature, Ca substitution and pressure. We also suggest that the most important role of high pressure for the stabilization of a superconducting ground state in Ca-rich two-leg ladders is an increase of the hole concentration in the conducting Cu\_2O\_3 planes. We have obtained an estimate of 0.10 hole per Cu1 for the hole concentration at low temperature in Ca12 under 32 kbar when this compound undergoes a superconducting transition at 5K. Such a value fits fairly well with the doping phase diagram of cuprate superconductors.
description: 9 pages (Revtex), mai 2005
THE IMPACT OF TARIFF-RATE QUOTAS AND IMPERFECT COMPETITION ON MARKET ACCESS
Creators: name: Joerin, Robert
name: Joerin, Robert
Publisher: name: Unknown
Year: 2001
Subjects: International Relations/Trade

description: This paper was presented at the INTERNATIONAL TRADE IN LIVESTOCK PRODUCTS SYMPOSIUM in Auckland, New Zealand, January 18-19, 2001. The Symposium was sponsored by: the International Agricultural Trade Research Consortium, the Venture Trust, Massey University, New Zealand, and the Centre for Applied Economics and Policy Studies, Massey University. Dietary changes, especially in developing countries, are driving a massive increase in demand for livestock products. The objective of this symposium was to examine the consequences of this phenomenon, which some have even called a "revolution." How are dietary patterns changing, and can increased demands for livestock products be satisfied from domestic resources? If so, at what cost? What will be the flow-on impacts, for example, in terms of increased demands for feedgrains and the pressures for change within marketing systems? A supply-side response has been the continued development of large-scale, urban-based industrial livestock production systems that in many cases give rise to environmental concerns. If additional imports seem required, where will they originate and what about food security in the importing regions? How might market access conditions be re-negotiated to make increased imports achievable? Other important issues discussed involved food safety, animal health and welfare and the adoption of biotechnology, and their interactions with the negotiation of reforms to domestic and trade policies. Individual papers from this conference are available on AgEcon Search. If you would like to see the complete agenda and set of papers from this conference, please visit the IATRC Symposium web page at: http://www1.umn.edu/iatrc.intro.htm
Spatiotemporal variability at seasonal and interannual scales of terrestrial water variation over Tibetan Plateau from geodetic observations
Creators: name: Pan, Yuanjin
name: Zhang, Xiaohong
name: Jiao, Jiashuang
name: Xiao, Yixin
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Infectious Diseases
subject: FOS: Health sciences

description: In the context of ongoing global climate warming, researchers have observed an intricate relationship between the variability of Terrestrial Water Storage (TWS) on the Tibetan Plateau (TP) and climate anomalies. In this study, we utilize a combination of Global Navigation Satellite System (GNSS), Gravity Recovery and Climate Experiment (GRACE), and precipitation data to investigate the response of TWS on the TP to extreme climate changes, with a focus on seasonal and interannual variations. Our findings reveal that the first Common Mode Component (1st CMC) extracted from GNSS coordinate time series exhibits strong interannual fluctuations. Additionally, both GNSS and GRACE-inferred TWS demonstrate noticeable anomalous changes during the 2015/2016 period. The estimated periods of the 1st CMC of GNSS and GRACE-inferred TWS are approximately 5 and 7 years, respectively. Both reach a minimum during the extreme climate event in 2015/2016. Furthermore, we investigate the spatial variation of summer precipitation before and after the extreme drought event on the TP. It reveals that the inflection point of TWS occurs approximately 1 year prior to the drought event, suggesting a consistent spatial propagation process between precipitation and TWS. This indicates that the changes of TWS during this drought event were primarily influenced by precipitation. Finally, we evaluate the response of 12 sub-basins on the TP to the drought event that occurred in 2015/2016. The regions experiencing significant abnormal fluctuations in TWS are mainly located in inner and northeastern plateau. These regions show rapid upward changes in the TWS and demonstrate a strong spatial consistency with summer precipitation.
A Simple Proof of the Kochen-Specker Theorem on the Problem of Hidden Variables
Creators: name: Straumann, Norbert
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this talk I present a simple derivation of an old result of Kochen and Specker, which is apparently unrelated to the famous work of Bell on hidden variables, but is presumably equally important. Kochen and Specker showed in 1967 that quantum mechanics cannot be embedded into a classical stochastic theory, provided the quantum theoretical probability distributions are reproduced and one additional highly desirable property is satisfied. This showed in a striking manner what were the difficulties in implementing the Einstein programme of a `complete' version of quantum mechanics.
description: 9 pages, invited talk (birthday contribution for Ruth Durrer, Geneva, January 25, 2008)
GFBio Data Transformation Service (DTS)
Creators: name: Fichtmüller, David
name: Holetschek, Jörg
name: Luther, Katja
name: Güntsch, Anton
Publisher: name: Zenodo
Year: 2021
Subjects: GFBio
research data management
Data reuse
Data transformation

description: Poster GFBio-09 from the GFBio General Assembly 2021 of "Work Package 3 - Data Access and Analyzes" of the GFBio Project summarizing the projects and subtasks work and outcome between 2013 and 2021. Occurrence and taxon information are floating around in the cosmos of biodiversity networks and repositories in a multitude of standards, ABCD and DarwinCore archives being the best-known. Transforming data between the different formats is possible for some of them, albeit lossy due to different scopes and granularities, but since most data standards are evolving over time, conversion rules and implementations are in constant flow. Facilitating data transformations in one place will make them easier to maintain and can reduce the efforts for implementing new services or portals.
Influence of alternative vegetation management treatments on plant community attributes : abundance, species diversity, and structural diversity
Creators: name: Lindgren, Pontus Mauritz Fredrik
Publisher: name: University of British Columbia
Year: 2009

description: This study was designed to test the hypothesis that alternative vegetation management treatments (manual cutting and cut-stump applications of glyphosate herbicide), applied to young plantations, would decrease plant community abundance (crown volume index), species diversity, and structural diversity. The experimental design consisted of nine operational-sized plantations stratified on the basis of location and elevation into 3 blocks (i.e., 1 control, 1 manual, and 1 cut-stump plantation per block), and with 5 permanent strip-transects to sample vegetation within each plantation. Vegetation management treatments did not significantly (P > 0.10) affect the crown volume index of the herb, shrub, or coniferous tree layers. However, both manual and cut-stump treatments significantly reduced the crown volume index of deciduous trees in the first posttreatment year (P = 0.05 and P < 0.01, respectively). Due to prolific growth of stump sprouts, the manual treatment effect did not extend past the first post-treatment year. In contrast, the cut-stump treatment impeded sprouting and, relative to control and manual treatments, significantly suppressed deciduous growth for at least four years (P < 0.05). Species richness, diversity, and turnover of the herb, shrub, and tree layers were not significantly (P > 0.10) different between treatments and control. Similarly, the structural diversity of herb, shrub, and tree layers were also not significantly (P > 0.10) different between treatments and control. By opening the canopy and decreasing the dominance of the deciduous tree layer, both manual and cut-stump treatments showed greater total structural diversity (herb, shrub, and tree layers combined) relative to the control. However, differences in total structural diversity between treatments and control were, for the most part, not significant (P > 0.10). Therefore, the vegetation management treatments used in this study decreased only the volume of the targeted deciduous tree layer and did not adversely affect the species richness, diversity, turnover, or structural diversity of the plant community.
Two Clusters with Radio-quiet Cooling Cores
Creators: name: Donahue, Megan
name: Voit, G. Mark
name: O'Dea, Christopher P.
name: Baum, Stefi A.
name: Sparks, William B.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Radio lobes inflated by active galactic nuclei at the centers of clusters are a promising candidate for halting condensation in clusters with short central cooling times because they are common in such clusters. In order to test the AGN-heating hypothesis, we obtained Chandra observations of two clusters with short central cooling times yet no evidence for AGN activity: Abell 1650 and Abell 2244. The cores of these clusters indeed appear systematically different from cores with more prominent radio emission. They do not have significant central temperature gradients, and their central entropy levels are markedly higher than in clusters with stronger radio emission, corresponding to central cooling times ~ 1 Gigayear. Also, there is no evidence for fossil X-ray cavities produced by an earlier episode of AGN heating. We suggest that either (1) the central gas has not yet cooled to the point at which feedback is necessary to prevent it from condensing, possibly because it is conductively stabilized, or (2) the gas experienced a major heating event $\gtrsim 1$ Gyr in the past and has not required feedback since then. The fact that these clusters with no evident feedback have higher central entropy and therefore longer central cooling times than clusters with obvious AGN feedback strongly suggests that AGNs supply the feedback necessary to suppress condensation in clusters with short central cooling times.
description: ApJ Letter, in press
REGIONALIZATION OF TRADE IN LIVESTOCK AND LIVESTOCK PRODUCTS
Creators: name: Annand, Mel
name: Annand, Mel
Publisher: name: Unknown
Year: 2001
Subjects: International Relations/Trade

description: This paper was presented at the INTERNATIONAL TRADE IN LIVESTOCK PRODUCTS SYMPOSIUM in Auckland, New Zealand, January 18-19, 2001. The Symposium was sponsored by: the International Agricultural Trade Research Consortium, the Venture Trust, Massey University, New Zealand, and the Centre for Applied Economics and Policy Studies, Massey University. Dietary changes, especially in developing countries, are driving a massive increase in demand for livestock products. The objective of this symposium was to examine the consequences of this phenomenon, which some have even called a "revolution." How are dietary patterns changing, and can increased demands for livestock products be satisfied from domestic resources? If so, at what cost? What will be the flow-on impacts, for example, in terms of increased demands for feedgrains and the pressures for change within marketing systems? A supply-side response has been the continued development of large-scale, urban-based industrial livestock production systems that in many cases give rise to environmental concerns. If additional imports seem required, where will they originate and what about food security in the importing regions? How might market access conditions be re-negotiated to make increased imports achievable? Other important issues discussed involved food safety, animal health and welfare and the adoption of biotechnology, and their interactions with the negotiation of reforms to domestic and trade policies. Individual papers from this conference are available on AgEcon Search. If you would like to see the complete agenda and set of papers from this conference, please visit the IATRC Symposium web page at: http://www1.umn.edu/iatrc.intro.htm
title: Σχεδιασμός και ανάπτυξη συστήματος υποδομής web υπηρεσιών σε φοιτητές
title: Design and development of an infrastructure system for providing web services to students
titleType: AlternativeTitle
Creators: name: Κάσσος, Αντώνιος
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2023
Subjects: C#
.NET Framework
API
SQL
REST
SAML2
Web services
Πληροφοριακό σύστημα
Βάσεις δεδομένων

description: Η παρούσα διπλωματική εργασία ασχολείται με τον σχεδιασμό και την ανάπτυξη ενός πληροφοριακού συστήματος υποδομής χρησιμοποιώντας σύγχρονες τεχνολογίες, με σκοπό τη μηχανοργάνωση διαδικασιών που αφορούν τις πτυχιακές και διπλωματικές εργασίες των φοιτητών, όπως αυτές ορίζονται στον Εσωτερικό Κανονισμό του Πανεπιστημίου Δυτικές Αττικής. Το πληροφοριακό σύστημα καλείται να επιλύσει ορισμένα προβλήματα που αναδεικνύονται μέσα από την ανάλυση της υφιστάμενης κατάστασης, καθώς και να απλοποιήσει διαδικασίες όπως η αίτηση, η ανάθεση και η αξιολόγηση των πτυχιακών και διπλωματικών εργασιών, για όλους τους εμπλεκόμενους. Η εργασία εκπονήθηκε με στόχο τη πλήρη αξιοποίηση του υλοποιημένου συστήματος υποδομής από το Τμήμα Μηχανικών Πληροφορικής και Υπολογιστών και τη διασύνδεση του τόσο με υπάρχουσες όσο και με μελλοντικές εφαρμογές του πανεπιστημίου, ώστε να διασφαλίζεται η ομαλή διεκπεραίωση των διπλωματικών εργασιών από την αρχή ως τέλος.
Exciting odd frequency equal-spin-triplet correlations at metal-superconductor interfaces
Creators: name: Pal, Subhajit
name: Benjamin, Colin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: We predict the occurrence of odd frequency equal-spin-triplet correlations at a normal metal-superconductor junction. This result is significant because equal-spin-triplet correlations are associated with the presence of dissipation-less pure spin current. Inserting a spin-flipper at the interface of a normal metal-superconductor junction excites equal-spin-triplet correlations. The existence of odd frequency equal-spin-triplet correlations in absence of odd frequency mixed spin-triplet correlations is the main take-home message of this work. It tallies well with the measured local magnetization density of states and spin-polarized local density of states at the interface. The importance of spin-flip scattering to the obtained results is manifest when we compare our normal metal-spin flipper-superconductor junction to other hybrid junctions where either only spin mixing or both spin mixing and spin-flip scattering are present.
description: 27 pages, 11 figures, accepted for publication in Physical Review B
title: Wetterwarnungen wirksamer gestalten
title: Vorschläge für den Deutschen Wetterdienst basierend auf Erkenntnissen aus WEXICOM III
titleType: Subtitle
Creators: name: Schulze, Katja
name: Voss, Martin
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: Wetterwarnung
subject: Katastrophen
subject: Bevölkerungsschutz
subject: 300 Sozialwissenschaften::300 Sozialwissenschaften, Soziologie::300 Sozialwissenschaften

description: Das vorliegende Arbeitsmaterial stellt die von der Katastrophenforschungsstelle (KFS) im Projekt WEXICOM III generierten Empfehlungen zur Verbesserung von Wetterwarnungen mit Fokus auf die Bedürfnisse spezifischer Bevölkerungsgruppen vor. Die Vorschläge wurden aus den Erkenntnissen mehrerer empirischer Studien gewonnen. Es werden fünf Zielbereiche fokussiert, die jeweils theoretisch und empirisch begründet werden.
The peak luminosity - peak energy correlation in GRBs
Creators: name: Ghirlanda, G.
name: Ghisellini, G.
name: Firmani, C.
name: Celotti, A.
name: Bosnjak, Z.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We derive the peak luminosity - peak energy (L_iso - E_peak) correlation using 22 long Gamma-Ray Bursts (GRBs) with firm redshift measurements. We find that its slope is similar to the correlation between the time integrated isotropic emitted energy E_iso and E_peak (Amati et al. 2002). For the 15 GRBs in our sample with estimated jet opening angle we compute the collimation corrected peak luminosity L_gamma, and find that it correlates with E_peak. This has, however, a scatter larger than the correlation between E_peak and E_gamma (the time integrated emitted energy, corrected for collimation; Ghirlanda et al. 2004), which we ascribe to the fact that the opening angle is estimated through the global energetics. We have then selected a large sample of 442 GRBs with pseudo--redshifts, derived through the lag-luminosity relation, to test the existence of the L_iso-E_peak correlation. With this sample we also explore the possibility of a correlation between time resolved quantities, namely L_iso,p and the peak energy at the peak of emission E_peak,p.
description: 5 pages, 5 figures, 2 tables - MNRAS Letters submitted
MEDIUM TERM PROJECTIONS AND SELECTED ISSUES FOR MEAT MARKETS
Creators: name: Liapis, Peter S.
name: Liapis, Peter S.
Publisher: name: Unknown
Year: 2001
Subjects: subject: Marketing
subject: FOS: Economics and business

description: This paper was presented at the INTERNATIONAL TRADE IN LIVESTOCK PRODUCTS SYMPOSIUM in Auckland, New Zealand, January 18-19, 2001. The Symposium was sponsored by: the International Agricultural Trade Research Consortium, the Venture Trust, Massey University, New Zealand, and the Centre for Applied Economics and Policy Studies, Massey University. Dietary changes, especially in developing countries, are driving a massive increase in demand for livestock products. The objective of this symposium was to examine the consequences of this phenomenon, which some have even called a "revolution." How are dietary patterns changing, and can increased demands for livestock products be satisfied from domestic resources? If so, at what cost? What will be the flow-on impacts, for example, in terms of increased demands for feedgrains and the pressures for change within marketing systems? A supply-side response has been the continued development of large-scale, urban-based industrial livestock production systems that in many cases give rise to environmental concerns. If additional imports seem required, where will they originate and what about food security in the importing regions? How might market access conditions be re-negotiated to make increased imports achievable? Other important issues discussed involved food safety, animal health and welfare and the adoption of biotechnology, and their interactions with the negotiation of reforms to domestic and trade policies. Individual papers from this conference are available on AgEcon Search. If you would like to see the complete agenda and set of papers from this conference, please visit the IATRC Symposium web page at: http://www1.umn.edu/iatrc.intro.htm