cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Inertial Range and the Kolmogorov Spectrum of Quantum Turbulenc
Creators: name: Tsubota, Makoto
name: Kobayashi, Michikazu
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Quantum turbulence is numerically studied by solving the Gross-Pitaevskii equation. Introducing both the energy dissipation at small scales and the energy injection at large scales, we succeed in obtaining the steady turbulence made by the balance of the injection and the dissipation of the energy. The inertial range takes the Kolmogorov spectrum and the energy flux is consistent with the energy dissipation rate at small scales. These results confirm the properties of the inertial range of quantum turbulence, proposing a prototype of turbulence much simpler than conventional classical turbulence.
description: 2pages, 2figures
Non-BPS D9-branes in the Early Universe
Creators: name: Hotta, Kenji
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We have investigated the finite temperature systems of non-BPS D-branes and D-brane-anti-D-brane pairs in the previous papers. It has been shown that non-BPS D9-branes and D9-anti-D9 pairs become stable near the Hagedorn temperature on the basis of boundary string field theory. This implies that there is a possibility that these spacetime-filling branes exist in the early universe. We study the time evolution of the universe in the presence of non-BPS D9-branes on the basis of boundary string field theory in this paper. We try to construct the following scenario for the early universe: The universe expands at high temperature and the open string gas on the non-BPS D9-branes dominates the total energy of the system at first. The temperature decreases as the universe expands. Then the non-BPS D9-branes become unstable at low temperature and decay through tachyon condensation. We obtain some classical solutions for Einstein gravity and dilaton gravity in the very simple cases.
description: 26 pages, 9 figures, comments and references added, minor errors corrected, version to appear in JHEP
title: Ανάλυση στοιχείων και μέτρων φτώχειας σε χώρες της ΕΕ και διασύνδεση με δείκτες υγείας και κοινωνικούς παράγοντες
title: Analysis of deprivation data and measures and connection to social factors and health related issues in EU
titleType: AlternativeTitle
Creators: name: Σακκάς, Σταύρος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2019
Subjects: subject: Δείκτες υγείας
subject: Κοινωνικοί παράγοντες
subject: Στοιχεία και μέτρα φτώχειας
subject: Ευρωπαϊκή Ένωση

description: Στην καθημερινή ζωή η "φτώχεια" ορίζεται ως η αδυναμία απόκτησης ενός αξιοπρεπούς τρόπου ζωής. Έτσι, η έλλειψη ενός στοιχειώδους επιπέδου διατροφής, ένδυσης και στέγασης είναι ένα προφανές μέτρο. Ωστόσο, το τι θεωρείται επαρκές και τι θεωρείται αναγκαίο είναι διαφορετικό ανάλογα με την εποχή και την κοινωνία και υπό αυτή την έννοια η φτώχεια είναι σχετική. Πιο συγκεκριμένα, η φτώχεια ορίζεται σε σχέση με το μέσο (median) εισόδημα της χώρας. Έτσι, το όριο της φτώχειας ορίζεται στο 60% του μέσου εισοδήματος. Με άλλα λόγια, οι άνθρωποι που έχουν εισόδημα λιγότερο από το 60% του μέσου εισοδήματος της χώρας τους, κινδυνεύουν να ανήκουν στην κατηγορία των φτωχών. Σύμφωνα με στοιχεία της ευρωπαϊκής ένωσης, σχεδόν 84 εκατομμύρια Ευρωπαίοι ζουν στα όρια της φτώχειας, γεγονός που συνεπάγεται σωρεία προβλημάτων για τους ίδιους αλλά και για το κοινωνικό σύνολο. Η φτώχεια δημιουργεί στους ανθρώπους συναισθήματα ανασφάλειας και επιβλαβών καταστάσεων όσον αφορά την υγεία, καθώς δυσκολεύονται να καλύψουν βασικές βιοτικές ανάγκες, ενώ παράλληλα είναι αναγκασμένοι να ακολουθούν συγκεκριμένο τρόπο ζωής, ο οποίος συνήθως οδηγεί σε αρνητικά φαινόμενα. Σκοπός και στόχος της παρούσας εργασίας είναι να αναδείξει και να αναλύσει τις επιπτώσεις της φτώχειας σε συνάρτηση με τους δείκτες υγείας και τους κοινωνικούς παράγοντες. Η φτώχεια είναι ένα παγκόσμιο κοινωνικό πρόβλημα που ζητά λύση. Μέσω και της στατιστικής ανάλυσης των δεδομένων παρατηρήθηκε ότι τα σημαντικότερα ευρήματα έχουν να κάνουν με την ιδιαίτερα μεγάλη διαφορά ανάμεσα στο χαμηλότερο και τον υψηλότερο μέσο εισόδημα στην κάθε χώρα, και παρατηρείται ότι το 50% του πληθυσμού έχει αρνητική κατάσταση υγείας και ένα σημαντικό ποσοστό πάσχει και από κατάθλιψη. Σκοπός είναι να παρουσιαστούν όσο το δυνατόν περισσότερα στοιχεία και να δοθεί το έναυσμα για την περαιτέρω διερεύνηση αυτού του φαινομένου.
title: Low cycle fatigue behaviour of DP steels
title: Micromechanical modelling vs. validation
titleType: AlternativeTitle
Creators: name: Moeini, Ghazal
name: Ramazani, Ali
name: Myslicki, Sebastian
name: Sundararaghavan, Veera
name: Könke, Carsten
Publisher: name: Technische Universität Dortmund
Year: 2017
Subjects: subject: Dual-phase (DP) steel
subject: Representative volume element (RVE)
subject: Dislocation-based model
subject: Cyclic deformation
subject: Hysteresis curve
subject: 620
subject: 670
subject: Dualphasenstahl
subject: Elementarzelle
subject: Zyklische Deformation
subject: Hysteresekurve

description: This study aims to simulate the stabilised stress-strain hysteresis loop of dual phase (DP) steel using micromechanical modelling. For this purpose, the investigation was conducted both experimentally and numerically. In the experimental part, the microstructure characterisation, monotonic tensile tests and low cycle fatigue tests were performed. In the numerical part, the representative volume element (RVE) was employed to study the effect of the DP steel microstructure of the low cycle fatigue behavior of DP steel. A dislocation-density based model was utilised to identify the tensile behavior of ferrite and martensite. Then, by establishing a correlation between the monotonic and cyclic behavior of ferrite and martensite phases, the cyclic deformation properties of single phases were estimated. Accordingly, Chaboche kinematic hardening parameters were identified from the predicted cyclic curve of individual phases in DP steel. Finally, the predicted hysteresis loop from low cycle fatigue modelling was in very good agreement with the experimental one. The stabilised hysteresis loop of DP steel can be successfully predicted using the developed approach.
description: Metals;Vol. 7, 2017, 7, p. 265
Generalizations of Efron's theorem
Creators: name: Oudghiri, Yannis
Publisher: name: arXiv
Year: 2020
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: In this article, we prove two new versions of a theorem proven by Efron in [Efr65]. Efron's theorem says that if a function $ϕ: \mathbb{R}^2 \rightarrow \mathbb{R}$ is non-decreasing in each argument then we have that the function $s \mapsto \mathbb{E}[ϕ(X,Y)|X+Y=s]$ is non-decreasing. We name restricted Efron's theorem a version of Efron's theorem where $ϕ: \mathbb{R} \rightarrow \mathbb{R}$ only depends on one variable. $PF_n$ is the class of functions such as $\forall a_1 \leq ... \leq a_n, b_1 \leq ... \leq b_n, \det(f(a_i-b_j))_{1 \leq i,j \leq n} \geq 0.$ The first version generalizes the restricted Efron's theorem for random variables in the $PF_n$ class. The second one considers the non-restricted Efron's theorem with a stronger monotonicity assumption. In the last part, we give a more general result of the second generalization of Efron's theorem.
MODELING MEMBER RESPONSES TO THE FARMER OWNED COOPERATIVE'S ALTERNATIVE CAPITAL MANAGEMENT STRATEGIES
Creators: name: Diaz-Hermelo, Francisco
name: Gray, Allan W.
name: Smith, Edward G.
name: Diaz-Hermelo, Francisco
name: Gray, Allan W.
name: Smith, Edward G.
Publisher: name: Unknown
Year: 2001
Subjects: Agribusiness

description: Research directed toward determining the optimal capital structure for agricultural cooperatives could provide solutions to debt-related financial stress problems (Moller, Featherstone, and Barton, 1996). Assessing the cooperatives' member needs, proper capitalization, and economies of scale are among the critical areas that need attention (Torgerson, 1992). This research dynamically models the capitalization of agricultural cooperatives with the ultimate goal of providing information that helps reduce the cooperatives financial stress and adequately addresses the member-owner's needs. Specifically, this research explores alternative equity management strategies for farmer-owned cooperatives. Unlike other equity management studies, this research focuses on the transition from current equity management practices to equity management practices that improve the cooperative's control over capitalization of assets, maintain competitiveness, and maximize the return to the individual farmer-owners in a risky economic and financial environment.
Complex Sequential Understanding through the Awareness of Spatial and Temporal Concepts
Creators: name: Pang, Bo
name: Zha, Kaiwen
name: Cao, Hanwen
name: Tang, Jiajun
name: Yu, Minghui
name: Lu, Cewu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Understanding sequential information is a fundamental task for artificial intelligence. Current neural networks attempt to learn spatial and temporal information as a whole, limited their abilities to represent large scale spatial representations over long-range sequences. Here, we introduce a new modeling strategy called Semi-Coupled Structure (SCS), which consists of deep neural networks that decouple the complex spatial and temporal concepts learning. Semi-Coupled Structure can learn to implicitly separate input information into independent parts and process these parts respectively. Experiments demonstrate that a Semi-Coupled Structure can successfully annotate the outline of an object in images sequentially and perform video action recognition. For sequence-to-sequence problems, a Semi-Coupled Structure can predict future meteorological radar echo images based on observed images. Taken together, our results demonstrate that a Semi-Coupled Structure has the capacity to improve the performance of LSTM-like models on large scale sequential tasks.
description: 15 pages, 5 figures, 8 tables
Radiative zone solar magnetic fields and g-modes
Creators: name: Rashba, T. I.
name: Semikoz, V. B.
name: Valle, J. W. F.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider a generalized model of seismic-wave propagation that takes into account the effect of a central magnetic field in the Sun. We determine the g-mode spectrum in the perturbative magnetic field limit using a one-dimensional Magneto-Hydrodynamics (MHD) picture. We show that central magnetic fields of about 600-800 kG can displace the pure g-mode frequencies by about 1%, as hinted by the helioseismic interpretation of GOLF observations.
description: 6 pages, 4 figures; final version to appear in MNRAS
Multi-instantons and superstring solitons
Creators: name: Loginov, E. K.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Multi-instanton solutions in the eight and seven dimensional Yang-Mills fields theory is obtained. Extended-soliton solutions to the low-energy heterotic-field-theory equations of motion is constructed from this higher-dimensional multi-instantons.
description: 6 pages, LaTeX, no figures
Self-induced heterogeneity in deeply supercooled liquids
Creators: name: Berthier, Ludovic
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: A theoretical treatment of deeply supercooled liquids is difficult because their properties emerge from spatial inhomogeneities that are self-induced, transient, and nanoscopic. I use computer simulations to analyse self-induced static and dynamic heterogeneity in equilibrium systems approaching the experimental glass transition. I characterise the broad sample-to-sample fluctuations of salient dynamic and thermodynamic properties in elementary mesoscopic systems. Findings regarding local lifetimes and distributions of dynamic heterogeneity are in excellent agreement with recent single molecule studies. Surprisingly broad thermodynamic fluctuations are also found, which correlate well with dynamics fluctuations, thus providing a local test of the thermodynamic origin of slow dynamics.
description: 6 pages, 4 figs
A Recent Look at the Quantum Berezinian in the Yangian Y(gl_{m|n})
Creators: name: Gow, Lucy
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Algebra (math.QA)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 17B37

description: Brundan and Kleshchev recently introduced a new family of presentations of the Yangian Y(gl_n) associated to the general linear Lie algebra gl_n, and thus provided a fresh approach to its study. In this article, we show how some of their ideas can be fruitfully extended to consider the Yangian Y(gl_{m|n}) associated to the Lie superalgebra gl_{m|n}. In particular, we give a new proof of the result by Nazarov that the quantum Berezinian is central.
description: 6 pages, AMS-LaTeX, minor corrections
AN EMPIRICAL ANALYSIS OF HONEYBEE POLLINATION MARKETS
Creators: name: Rucker, Randal R.
name: Thurman, Walter N.
name: Burgett, Michael
name: Rucker, Randal R.
name: Thurman, Walter N.
name: Burgett, Michael
Publisher: name: Unknown
Year: 2001
Subjects: subject: Marketing
subject: FOS: Economics and business

description: Pollination by honeybees plays an important role in modern agriculture. Some crops are greatly dependent on honeybees (almonds, apples, avocados, blueberries, and cherries are examples) while the yields and quality of other crops are significantly enhanced by honeybee pollination. The importance of understanding pollination markets has increased recently due to changes brought on by the twin scourges of Varroa and tracheal mites. Both are infestations of feral and domestic bees that imply greater future reliance on domesticated bees at higher cost. In the United States a complex market has evolved that connects itinerant beekeepers and their bee colonies with farmers who demand their services. While the fields of entomology and crop science have developed a large literature on general principles of beekeeping and its application to particular crops, there has been little economic analysis of pollination markets. In this paper, we begin to remedy this lack of attention by analyzing an extensive panel data set of individual pollination transactions for Oregon beekeepers. The Oregon panel constitutes a considerably larger and richer data set on pollination markets than the data set examined by Cheung (1973), which is our only empirical precedent. Using cross-sectional time series regression models, we find results that are consistent with Cheung's earlier findings on the consistency of pollination market outcomes with economic theory. Fees charged for placing colonies on crops that yield marketable honey are found to be less than for crops that yield no honey income to the beekeeper: the pollination fee for crops that produce honey is about $17 per colony less than for crops that produce no honey. Pollination fees also vary over time in response to changes in both crop prices and honey prices. Because bees are paid according to their value of marginal product in the production of crops, pollination fees should vary positively with crop prices. We find that a ten percent increase in crop prices causes pollination fees to increase by about $.40 per colony. With respect to honey prices, we find that a ten percent increase is estimated to decrease pollination fees by about $2.50 per colony. This estimated effect is a previously unexplored link between the now-defunct honey program and its longstanding public policy rationale, the encouragement of honeybee pollination. Insofar as the honey program successfully maintained the price of honey above levels that would otherwise have been observed, our analysis suggests that elimination of the program has resulted in a reduction in pollination services and an increase in pollination fees.
AN EXAMINATION OF ECONOMIC EFFICIENCY OF RUSSIAN CROP OUTPUT IN THE REFORM PERIOD
Creators: name: Osborne, Stefan
name: Trueblood, Michael A.
name: Osborne, Stefan
name: Trueblood, Michael A.
Publisher: name: Unknown
Year: 2001
Subjects: Crop Production/Industries
Productivity Analysis

description: This paper examines economic efficiency of Russian corporate farms for 1995-98. Economic efficiency declined over the period, due to declines in both technical and allocative inefficiency. According to the average technical efficiency scores, Russian agricultural production could improve from 17 to 43 percent according to DEA and SFA analysis, respectively. The efficiency scores show that Russian agriculture presently uses relatively too much fertilizer and fuel and too little land and labor. Russian agriculture inherited machinery-intensive technology from the Soviet era, which may be inappropriate given the relative abundance of labor in the post-reform environment. Investment constraints have prevented the replacement of old machinery-intensive technology with labor intensive technology.
Localization of Bose-Einstein Condensation and Disappearance of Superfluidity of Strongly Correlated Bose Fluid in a Confined Potential
Creators: name: Kobayashi, Michikazu
name: Tsubota, Makoto
Publisher: name: arXiv
Year: 2005
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We develop a Bose fluid model in a confined potential to consider the new quantum phase due to the localization of Bose-Einstein condensation and disappearance of superfluidity which is recently observed in liquid 4He in porous glass at high pressures. A critical pressure of the transition to this phase can be defined by our new analytical criterion of supposing the size of localized Bose-Einstein condensate becomes comparable to the scale of confinement. The critical pressure is quantitatively consistent with observations without free parameters.
description: 2 pages, 1 figure
Exotic Landau Diamagnetism and Weyl-Fermions Excitations in TaAs Revealed by $^{75}$As NMR and NQR
Creators: name: Wang, C. G.
name: Honjo, Yoshiaki
name: Zhao, L. X.
name: Chen, G. F.
name: Matano, K.
name: Zhou, R.
name: Zheng, Guo-qing
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The electronic and superconducting properties associated with the topologically non-trivial bands in Weyl semimetals have recently attracted much attention. We report the microscopic properties of the type-I Weyl semimetal TaAs measured by $^{75}$As nuclear magnetic (quadrupole) resonance under zero and elevated magnetic fields over a wide temperature range up to 500 K. The magnetic susceptibility measured by the Knight shift $K$ is found to be negative at low magnetic fields and have a strong field ($B$) dependence as ln$B$ at $T$ = 1.56 K. Such nonlinear field-dependent magnetization can be well accounted for by Landau diamagnetism arising from the 3D linearly dispersed bands, and thus is a fingerprint of topological semimetals. We further study the low-energy excitations by the spin-lattice relaxation rate 1/$T_{1}$. At zero field and 30 K $\leq T\leq$ 250 K, 1/$T_{1}T$ shows a $T^{2}$ variation due to Weyl nodes excitations. At $B \sim$ 13 T, $1/T_1T$ exhibits the same $T$-dependence but with a smaller value, scaling with $K^2\propto T^2$, which indicates that the Korringa relation also holds for a Weyl semimetal. Analysis of the Korringa ratio reveals that the energy range of the linear bands is about 250 K in TaAs.
description: Phys.Rev. B, Rapid Commu. (in press)
Modified Grover operator for amplitude estimation
Creators: name: Uno, Shumpei
name: Suzuki, Yohichi
name: Hisanaga, Keigo
name: Raymond, Rudy
name: Tanaka, Tomoki
name: Onodera, Tamiya
name: Yamamoto, Naoki
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, we propose a quantum amplitude estimation method that uses a modified Grover operator and quadratically improves the estimation accuracy in the ideal case, as in the conventional one using the standard Grover operator. Under the depolarizing noise, the proposed method can outperform the conventional one in the sense that it can in principle achieve the ultimate estimation accuracy characterized by the quantum Fisher information in the limit of a large number of qubits, while the conventional one cannot achieve the same value of ultimate accuracy. In general this superiority requires a sophisticated adaptive measurement, but we numerically demonstrate that the proposed method can outperform the conventional one and approach to the ultimate accuracy, even with a simple non-adaptive measurement strategy.
description: 20 pages, 4 figures
Investigating a small oil-flooded twin-screw expander for waste-heat utilisation in ORC systems
Creators: name: Nikolov, Alexander
name: Brümmer, Andreas
Publisher: name: Technische Universität Dortmund
Year: 2017
Subjects: Small oil-flooded twin-screw expander
Low-grade waste-heat recovery
Organic Rankine cycle power system
R245fa

description: Screw-type expanders offer excellent prospects for energy conversion in lower and medium power ranges, for instance as expansion engines in Rankine cycles with regard to either waste or geothermal heat recovery. With the aim of identifying the potential in organic Rankine cycle (ORC) power systems, an oil-flooded twin-screw expander without timing gears was designed and experimentally investigated in an ORC with R245fa as working fluid. Here, the scope for the experimental determination of the expander characteristic map was limited by the test rig specifications. Based on the experimental results, a multi-chamber model of the test twin-screw expander was calibrated and theoretical approaches according to mechanical and hydraulic loss calculation were applied. Consequently, the expander’s complete characteristic map could be calculated. Furthermore, relevant mechanisms influencing the operational behaviour of oil-flooded twin-screw expanders were identified and analysed in-depth
description: Energies;2017, 10(7), 869
Thermal and Curvature Effects to Spontaneous Symmetry Breaking in phi^4 Theory
Creators: name: Hattori, T.
name: Hayashi, M.
name: Inagaki, T.
name: Kitadono, Y.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the thermal and curvature effect to spontaneous symmetry breaking in phi^4 theory. The effective potential is evaluated in D-dimensional static universe with positive curvature R X S^{D-1} or negative curvature R X H^{D-1}. It is shown that temperature and positive curvature suppress the symmetry breaking, while negative curvature enhances it. To consider the back-reaction we numerically solve the gap equation and the Einstein equation simultaneously. The solution gives the relationship between the temperature and the scale factor.
description: 4 pages. To appear in the proceedings of 7th Workshop on Quantum Field Theory Under the Influence of External Conditions (QFEXT 05), Barcelona, Catalonia, Spain, 5-9 Sep 2005. References are add
Sustainable architecture evaluation method in an African context:transgressing discipline boundaries with a systems approach
Creators: name: Sanya, Tom
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 330314
subject: Sustainable design
classificationCode: 330206
subject: Building science, technologies and systems

description: This paper presents a method for poverty-inclusive evaluation of architectural sustainability. Existing evaluation tools largely ignore poverty – an omission that renders them inadequate for use in a developing country context. Methodological challenges arise from the complexity due to inclusion of poverty alongside numerous other sustainability aspects. Moreover, the shared transdisciplinary nature of architecture and sustainability coupled with inherent scale polarities add to the complexity. The evaluation method discussed here adopts concepts from systems theory to develop a framework that addresses the above challenges. It yields credible results in a developing country context with a dearth of research precedents and data-bases. The method was applied in an empirically-based study of the sustainability performance of earth walling techniques in Uganda. The study showed that, from a sustainability viewpoint, wattle-and-daub performs best, followed by adobe whereas the most popular brick was only better than the Compressed Earth Blocks. In their transparency, the evaluation method and results here presented can stand conventional academic scrutiny but the conclusions point to the need for greater acceptance of transdisciplinary approaches to knowledge conceptualism if the holistic disposition of sustainability, architecture and sustainable architecture is to be accommodated
Atom-molecule coherence in a one-dimensional system
Creators: name: Citro, R.
name: Orignac, E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study a model of one-dimensional fermionic atoms that can bind in pairs to form bosonic molecules. We show that at low energy, a coherence develops between the molecule and fermion Luttinger liquids. At the same time, a gap opens in the spin excitation spectrum. The coherence implies that the order parameters for the molecular Bose-Einstein Condensation and the atomic BCS pairing become identical. Moreover, both bosonic and fermionic charge density wave correlations decay exponentially, in contrast with a usual Luttinger liquid. We exhibit a Luther-Emery point where the systems can be described in terms of noninteracting pseudofermions. At this point, we provide closed form expressions for the density-density response functions.
description: 5 pages, no figures, Revtex 4; (v2) added a reference to cond-mat/0505681 where related results are reported; (v3) Expression of correlation functions given in terms of generalized hypergeometric functions
ESTABLISHING AN AGRIBUSINESS STUDY ABROAD COURSE IN MEXICO: A PROJECT IN INTERNATIONALIZING THE CURRICULUM
Creators: name: Ames, Glenn C.W.
name: Houston, Jack E.
name: Ames, Glenn C.W.
name: Houston, Jack E.
Publisher: name: Unknown
Year: 2001
Subjects: Teaching/Communication/Extension/Profession

description: Study abroad provides students with a cross-cultural experience and a new perspective on the global market place. Seven students from the University of Georgia enrolled in an initial course entitled , International Agribusiness Marketing and Management: Focus on Mexico, at the University Veracruzana in Xalapa during the Maymester 2000. Their curriculum included field trips to agribusinesses, Spanish classes and lectures on Mexican business culture, and NAFTA. As a result, students became more comfortable in cross-cultural environments and confident in their abilities.
Photon-Dressed Bloch-Siegert Shift in an Ultrastrongly Coupled Circuit Quantum Electrodynamical System
Creators: name: Wang, Shuai-Peng
name: Zhang, Guo-Qiang
name: Wang, Yimin
name: Chen, Zhen
name: Li, Tiefu
name: Tsai, J. S.
name: Zhu, Shi-Yao
name: You, J. Q.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: A cavity quantum electrodynamical (QED) system beyond the strong-coupling regime is expected to exhibit intriguing quantum phenomena. Here we report a direct measurement of the photon-dressed qubit transition frequencies up to four photons by harnessing the same type of state transitions in an ultrastrongly coupled circuit-QED system realized by inductively coupling a superconducting flux qubit to a coplanar-waveguide resonator. This demonstrates a convincing observation of the photon-dressed Bloch-Siegert shift in the ultrastrongly coupled quantum system. Moreover, our results show that the photon-dressed Bloch-Siegert shift becomes more pronounced as the photon number increases, which is a characteristic of the quantum Rabi model.
description: 11 pages, 8 figures
title: Χρόνια νεφρική νόσος και αιμοκάθαρση. Ποιότητα ζωής και κόστος θεραπείας
title: Chronic kidney disease and dialysis. Quality of life and cost treatment
titleType: AlternativeTitle
Creators: name: Ηλιάκου-Κουτρελάκου, Στεφανία
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Ποιότητα ζωής
subject: Χρόνια νεφρική νόσος
subject: Προθυμία πληρωμής

description: H χρόνια νεφρική νόσος είναι ένα παγκόσμιο πρόβλημα δημόσιας υγείας, που πλήττει πολλά εκατομμύρια άτομα παγκοσμίως. Το βάρος της νεφρικής νόσου ποικίλλει σημαντικά σε ολόκληρο τον κόσμο, όπως και η ανίχνευση και η θεραπεία της. Οι ασθενείς με χρόνια νεφρική νόσο, καθώς και τα συστήματα υγείας, αντιμετωπίζουν μεγάλες οικονομικές δαπάνες εξαιτίας αυτής της νόσου. Η κλιμάκωση των οικονομικών της επιπτώσεων και η πρόταση στρατηγικών για την ελαχιστοποίηση του κόστους που συνεπάγεται η αντιμετώπισή της, έχει διαμορφωθεί ως πρόκληση για την επιστημονική κοινότητα.. Η παρούσα μελέτη έχει ως στόχο τη διερεύνηση της ποιότητας ζωής των ατόμων που πάσχουν από χρόνια νεφρική νόσο που υποχρεούνται να κάνουν αιμοκάθαρση, των ασθενών που έχουν υποβληθεί σε μεταμόσχευση και των ασθενών NDD-CKD (χρόνια νεφρική νόσος που δεν εξαρτάται από αιμοκάθαρση), η καταγραφή των κατηγοριών κόστους θεραπείας βάση ΕΟΠΠΥ και η καταγραφή της προθυμίας τους να πληρώσουν (willingness-to-pay) με απώτερο σκοπό την βελτίωση της ποιότητας ζωής. Η μελέτη θα πραγματοποιηθεί με τη βοήθεια ερωτηματολογίου σε δείγμα 58 ασθενών (8 ασθενείς με μεταμόσχευση, 35 ασθενείς που υποβάλλονται σε αιμοκάθαρση και 15 ασθενείς NDD-CKD). Αν θεωρήσουμε ότι ετησίως ένας ασθενής κάνει αιμοκάθαρση περίπου 2 φορές την εβδομάδα τότε το κόστος ανά ασθενή για τα ασφαλιστικά ταμεία ανά έτος εκτιμήθηκε στα 13053.6 ευρώ. Από την ανάλυση των δεδομένων προέκυψε ότι η ομάδα ασθενών που υποβάλλονταν σε αιμοκάθαρση είχε χειρότερη ποιότητα ζωής από την ομάδα των ασθενών που είχαν υποβληθεί σε μεταμόσχευση και την ομάδα των ασθενών NDD-CKD. Τα αποτελέσματα αναφορικά με την εκτίμηση του κόστους ιατροφαρμακευτικής περίθαλψης που είναι αναγκασμένοι οι ασθενείς να πληρώνουν με δικά τους χρήματα (δεν καλύπτονται από ταμεία) σε εβδομαδιαία βάση έδειξαν ότι η ομάδα ασθενών που υποβάλλονταν σε αιμοκάθαρση είχε υψηλότερο μέσο κόστος τόσο από την ομάδα των ασθενών που είχαν υποβληθεί σε μεταμόσχευση όσο και από την ομάδα των ασθενών NDD-CKD. Τα αποτελέσματα έδειξαν ότι η ομάδα ασθενών που υποβάλλονταν σε αιμοκάθαρση εκδήλωναν μεγαλύτερη προθυμίας πληρωμής για να έχουν κάποια βελτίωση κατά 50% στην ποιότητα ζωής τους σε σύγκριση με την ομάδα των ασθενών που είχαν υποβληθεί σε μεταμόσχευση όσο και σε σύγκριση με την ομάδα των ασθενών NDD-CKD. Τέλος, από την ανάλυση σχετικά με το κατά πόσο η ποιότητα ζωής σχετίζεται με το κόστος και την προθυμία πληρωμής. Συμπερασματικά, μπορούμε να καταλήξουμε στο ότι οι ασθενείς που υποβάλλονται σε αιμοκάθαρση έχουν μειωμένη ποιότητα ζωής σε σχέση με τους ασθενείς που έχουν υποβληθεί σε μεταμόσχευση και τους ασθενείς που δεν εξαρτώνται από αιμοκάθαρση. Επιπλέον, η ποιότητα ζωής φαίνεται να σχετίζεται με το κόστος και την προθυμία πληρωμής των ασθενών για την εξασφάλιση καλύτερης ποιότητας ζωής.
Virus-induced gene silencing (VIGS) in Cannabis sativa L.
Creators: name: Schachtsiek, Julia
name: Hussain, Tajammul
name: Azzouhri, Khadija
name: Kayser, Oliver
name: Stehle, Felix
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Virus-induced gene silencing
subject: Cannabis sativa
subject: Cotton leaf crumple virus (CLCrV)
subject: Post-transcriptional gene silencing (PTGS)
subject: 660

description: Background:The raised demand of cannabis as a medicinal plant in recent years led to an increased interest in understanding the biosynthetic routes of cannabis metabolites. Since there is no established protocol to generate stable gene knockouts in cannabis, the use of a virus-induced gene silencing (VIGS) method, resulting in a gene knockdown, to study gene functions is desirable.Results:For this, a computational approach was employed to analyze the Cannabis sativa L. transcriptomic and genomic resources. Reporter genes expected to give rise to easily scorable phenotypes upon silencing, i.e. the phy-toene desaturase (PDS) and magnesium chelatase subunit I (ChlI), were identified in C. sativa. Subsequently, the targets of specific small interfering RNAs (siRNAs) and silencing fragments were predicted and tested in a post-transcriptional gene silencing (PTGS) approach. Here we show for the first time a gene knockdown in C. sativa using the Cotton leaf crumple virus (CLCrV) in a silencing vector system. Plants transiently transformed with the Agrobacterium tumefaciensstrain AGL1, carrying the VIGS-vectors, showed the desired phenotypes, spotted bleaching of the leaves. The success-ful knockdown of the genes was additionally validated by quantitative PCR resulting in reduced expression of tran-scripts from 70 to 73% for ChlI and PDS, respectively. This is accompanied with the reduction of the chlorophyll a and carotenoid content, respectively. In summary, the data clearly demonstrate the potential for functional gene studies in cannabis using the CLCrV-based vector system.Conclusions:The applied VIGS-method can be used for reverse genetic studies in C. sativa to identify unknown gene functions. This will gain deeper inside into unknown biosynthetic routes and will help to close the gap between avail-able genomic data and biochemical information of this important medicinal plant.
description: Plant methods;Jg. 15, S. 157-1-157-9
Self-Consistent Dynamic Models of Steady Ionization Fronts I. Weak-D and Weak-R Fronts
Creators: name: Henney, William J.
name: Arthur, S. Jane
name: Williams, Robin J. R.
name: Ferland, Gary J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a method for including steady-state gas flows in the plasma physics code Cloudy, which was previously restricted to modeling static configurations. The numerical algorithms are described in detail, together with an example application to plane-parallel ionization-bounded HII regions. As well as providing the foundation for future applications to more complex flows, we find the following specific results regarding the effect of advection upon ionization fronts in HII regions: 1. Significant direct effects of advection on the global emission properties occur only when the ionization parameter is lower than is typical for HII regions. 2. The overheating of partially ionized gas in the front is not large, even for supersonic (R-type) fronts. 3. The most significant morphological signature of advective fronts is an electron density spike that occurs at the ionization front. Observational evidence for such a spike is found in images of the Orion bar. 4. Plane-parallel, weak-D fronts are found to show at best a shallow correlation between mean velocity and ionization potential for optical emission lines even when the flow velocity closely approaches the ionized sound speed.
description: ApJ, main journal, in press 1 March 2005, v621 (22 pages, 3 appendices, 21 figures) PDF version with high-res figures available from http://www.astrosmo.unam.mx/~w.henney/astro-ph/0501034/
DISTANCE EDUCATION IN AGRICULTURAL ECONOMICS: AN ASSESSMENT OF STUDENT ACCEPTANCE AND PERFORMANCE.
Creators: name: Batte, Marvin T.
name: Forster, D. Lynn
name: Larson, Donald W.
name: Batte, Marvin T.
name: Forster, D. Lynn
name: Larson, Donald W.
Publisher: name: Unknown
Year: 2001
Subjects: Teaching/Communication/Extension/Profession

description: This paper reports an analysis of student evaluation of and performance in three agricultural economics classes offered at distance by audio-visual connection in real time. Multiple regression analyses of student questionnaire data are used to examine the relationship between student attributes and their evaluation of and performance in the distance-offered course.
Dyson's Classification And Real Division Superalgebras
Creators: name: Geiko, Roman
name: Moore, Gregory W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is well-known that unitary irreducible representations of groups can be usefully classified in a 3-fold classification scheme: Real, Complex, Quaternionic. In 1962 Freeman Dyson pointed out that there is an analogous 10-fold classification of irreducible representations of groups involving both unitary and antiunitary operators. More recently it was realized that there is also a 10-fold classification scheme involving superdivision algebras. Here we give a careful proof of the equivalence of these two 10-fold ways.
description: 26pp; Minor revisions and typo corrections
title: Balancing purification and ultrastructure of naturally derived bone blocks for bone regeneration
title: report of the purification effort of two bone blocks
titleType: AlternativeTitle
Creators: name: Barbeck, Mike
name: Jung, Ole
name: Xiong, Xin
name: Krastev, Rumen
name: Korzinskas, Tadas
name: Najman, Stevo
name: Radenković, Milena
name: Wegner, Nils
name: Knyazeva, Marina
name: Walther, Frank
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Bone block
subject: Allogeneic
subject: Xenogeneic
subject: Purification
subject: Bone regeneration
subject: Dentistry
subject: FOS: Clinical medicine
subject: 660
subject: Knochenspan
subject: Allogenes Transplantat
subject: Heterotransplantation
subject: Produktaufarbeitung
subject: Knochenbildung
subject: Zahnmedizin

description: The present publication reports the purification effort of two natural bone blocks, that is, an allogeneic bone block (maxgraft®, botiss biomaterials GmbH, Zossen, Germany) and a xenogeneic block (SMARTBONE®, IBI S.A., Mezzovico-Vira, Switzerland) in addition to previously published results based on histology. Furthermore, specialized scanning electron microscopy (SEM) and in vitro analyses (XTT, BrdU, LDH) for testing of the cytocompatibility based on ISO 10993-5/-12 have been conducted. The microscopic analyses showed that both bone blocks possess a trabecular structure with a lamellar subarrangement. In the case of the xenogeneic bone block, only minor remnants of collagenous structures were found, while in contrast high amounts of collagen were found associated with the allogeneic bone matrix. Furthermore, only island-like remnants of the polymer coating in case of the xenogeneic bone substitute seemed to be detectable. Finally, no remaining cells or cellular remnants were found in both bone blocks. The in vitro analyses showed that both bone blocks are biocompatible. Altogether, the purification level of both bone blocks seems to be favorable for bone tissue regeneration without the risk for inflammatory responses or graft rejection. Moreover, the analysis of the maxgraft® bone block showed that the underlying purification process allows for preserving not only the calcified bone matrix but also high amounts of the intertrabecular collagen matrix.
description: Materials;2019, 12(19), 3234
PRICE VOLATILITY IN THE U.S. DAIRY SECTOR: DUE TO WEEK-OF-MONTHS EFFECTS?
Creators: name: Natcher, William C.
name: Weaver, Robert D.
name: Natcher, William C.
name: Weaver, Robert D.
Publisher: name: Unknown
Year: 2001
Subjects: subject: Marketing
subject: FOS: Economics and business

description: Under recent dairy policy reforms, farm-level milk prices are determined by a multiple component pricing scheme that derives monthly dairy product class prices from weekly NASS survey prices for only the first two weeks of each month. This pricing rule may provide incentives for strategic behavior by dairy sector participants that could induce dairy product price volatility. This paper employs a series of nonparametric approaches to examine evidence of such price manipulation in CME weekly average dairy product prices. Empirical evidence suggests that no such week-of-month effects exist in levels of prices, and only very weak evidence of week-of-month effects in price volatility was found. Together, results suggest dairy product markets are competitively arbitraged rendering price manipulation infeasible. From these results, no evidence suggests that price manipulation might lie behind recent changes in price volatility observed in dairy markets.
Διαχρονική εξέλιξη της πράσινης ενέργειας στην Ελλάδα. Μελέτη περίπτωσης: βιομάζα - προβλέψεις
Creators: name: Αναγνωστοπούλου, Ανθούλα
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Πράσινη ενέργεια
subject: Βιωσιμότητα
subject: Ανανεώσιμες πηγές ενέργειας
subject: Βιομάζα
subject: Προβλέψεις

description: Σε παγκόσμιο επίπεδο, ο ρόλος της πράσινης ενέργειας στην επίτευξη των στόχων της βιωσιμότητας, είναι κυρίαρχος. Σε αυτά τα πλαίσια, η παραγωγή ηλεκτρικής ενέργειας από Ανανεώσιμες Πηγές Ενέργειας δεν αποτελεί πλέον μια, φιλική προς το περιβάλλον, πρακτική αλλά μία απαραίτητη επένδυση με πολλαπλά περιβαλλοντικά, κοινωνικά, πολιτικά και οικονομικά οφέλη. Στην παρούσα εργασία, γίνεται ένας απολογισμός των δράσεων που συνετέλεσαν στην εξέλιξη των Ανανεώσιμων Πηγών Ενέργειας σε παγκόσμιο και εθνικό επίπεδο, καθώς παρουσιάζονται και οι στόχοι που έχουν τεθεί στα πλαίσια της βιώσιμης ανάπτυξης και αποτελούν αφετηρία πολιτικών και δράσεων. Αντικείμενο της παρούσας εργασίας είναι η μελέτη της εξέλιξης των Ανανεώσιμων Πηγών Ενέργειας στο διασυνδεδεμένο ηλεκτρικό δίκτυο της Ελλάδας με σκοπό την πρόβλεψη μετρήσεων για την εισροή τους σε αυτό και την επίτευξη των οδηγιών – στόχων που έχουν τεθεί. Για την μελέτη περίπτωσης, την ενέργεια της βιομάζας, η οποία αποτελεί από τις πλέον σύγχρονες και φιλικές πηγές πράσινης ενέργειας με πολλαπλά οφέλη και παραμένει ανεκμετάλλευτη στον ελλαδικό χώρο, γίνεται μία διερεύνηση της δυνητικής δυναμικότητάς της και μία προσπάθεια πρόβλεψης της εξέλιξής της. Μέσα από την στατιστική ανάλυση γίνεται προσδιορισμός των χαρακτηριστικών των δύο υπό εξέταση μεγεθών, μελέτη της τάσης τους και τέλος, με τη βοήθεια μαθηματικών μεθοδολογιών γίνεται η προσπάθεια πρόβλεψης. Το σύνολο των χρονοσειρών, το οποίο χρησιμοποιήθηκε στην εν λόγω μελέτη, αφορά τα μηνιαία δεδομένα παραγωγής ηλεκτρικής ενέργειας από Ανανεώσιμες Πηγές ανά κατηγορία, για την περίοδο Ιανουάριος 2004- Νοέμβριος 2019 όπως αυτά παρατίθενται στα συνοπτικά πληροφοριακά δελτία των αρμόδιων διαχειριστών του ελληνικού συστήματος ηλεκτρικής ενέργειας, ενώ το διάστημα πρόβλεψης αφορά την περίοδο Δεκέμβριος 2019-Νοέμβριος 2020.
FACTORS AFFECTING CONTRACTOR AND GROWER SUCCESS IN HOG CONTRACTING
Creators: name: McBride, William D.
name: Key, Nigel D.
name: McBride, William D.
name: Key, Nigel D.
Publisher: name: Unknown
Year: 2001
Subjects: Livestock Production/Industries

description: This study analyzes a national survey of U.S. hog producers within a principal-agent framework in order to examine factors affecting contractor and grower success in hog contracting. Several factors had differential impacts on contractor and grower returns. Results suggest that there may be a role for public policy in ensuring that contract arrangements are conducted fairly.
Analysis of the circumstellar environment of the B[e] star HD 45677 (FS CMa)
Creators: name: Muratorio, Gérard
name: Rossi, Corinne
name: Friedjung, Michael
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We studied the circumstellar environment of the B[e] star HD 45677 through the analysis of the emission lines from ionized metals. We used the statistical approach of the self absorption curve method (SAC) to derive physical parameters of the line emitting region. The Fe II and Cr II double-peaked emission line structure is explained by the presence of a thin absorption component red shifted by ~3 km/s. This absorption component can be interpreted geometricaly as being due to infalling material perpendicularly to the disk seen nearly pole-on, as indicated by the emission line structure. The Cr II and Fe II emission lines have a complex structure with two (narrow and broad) components, of 45 and 180 km/s FWHM for the permitted lines and 25 and 100 km/s FWHM for the forbidden ones, respectively. We argue that the narrow components are principaly emitted by an optically thin disk seen nearly pole-on, in a region whose minimum radius is estimated to be 4 10^12 cm, while the broad ones are formed in a disk-linked wind.
description: 14 pages, submitted to Astronomy and Astrophysics
Τμηματοποίηση οδοντικών εικόνων με την χρήση νευρωνικών δικτύων
Creators: name: Φιλιππής, Χρήστος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Ανάλυση εικόνας
subject: Τμηματοποίηση εικόνας
subject: Βαθιά μάθηση
subject: Αναγνώριση προτύπου

description: Ο σκοπός της διατριβής αυτής είναι να γίνει χρήση της μηχανικής μάθησης προκειμένου να εξάγουμε πολύτιμες πληροφορίες από μια εικόνα και στην συνέχεια να χρησιμοποιηθούν για ιατρικούς σκοπούς. Οπότε εκπαιδεύεται ένα μοντέλο το οποίο θα εντοπίζει περιοχές ενδιαφέροντος σε εικόνες από δόντια. Οι περιοχές ενδιαφέροντος είναι βλάβες σε δόντια και κατά κύριο λόγο επιφανειακές και αφορούν παθήσεις των δοντιών όπως η τερηδόνα. Σαν βάση χρησιμοποιείται ένα ισχυρό νευρωνικό δίκτυο και στην συνέχεια γίνεται μια προσπάθεια βελτιστοποίησης των αποτελεσμάτων με περεταίρω επεξεργασία των προβλέψεων που προέκυψαν από το νευρωνικό. Το νευρωνικό που επιλέχθηκε έχει πολύ καλή απόδοση σε γνωστά σύνολα δεδομένων όπως το COCO με μεγάλο πλήθος αντικειμένων και στιγμιότυπων. Οπότε σαν αρχικό μοντέλο χρησιμοποιείται ένα μοντέλο που έχει προκύψει από εκπαίδευση πάνω σε αυτό το σύνολο δεδομένων, και στην συνέχεια προσαρμόστηκε πάνω στα δεδομένα του συγκεκριμένου προβλήματος.