cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Piezoelectric tool actuator for precision turning
Creators: name: Eddy, David
Publisher: name: University of British Columbia
Year: 2009

description: High precision machining has the potential of increasing the efficiency of machining operations and lowering costs in the manufacturing of many machined parts. This thesis investigates the use of a piezoelectric tool/actuator designed for the precision turning of cylindrical shafts. The piezo tool actuator has four fundamental components. The piezo stack element delivers a dynamic displacement range of 40 μm when 0 to -1000V voltage is applied. The piezo element is placed in a mechanical housing with leaf springs, which amplifies the displacement range to 62um. The piezo element is activated by an amplifier which delivers a maximum 150W and 0- 1000 V voltage. The digital control law runs on a PC/DSP which has 5KHz loop frequency. The tool position is measured using a laser displacement sensor with 0.1 μm accuracy, and the workpiece surface is monitored using another laser sensor which has 1 μm resolution. The piezo tool actuator is mounted on a standard CNC turning center turret, and is intended to be used in precision positioning of cutting tool within one micrometer during finish turning of shafts. The mathematical model of each component in the dynamic system is identified. The piezoelectric hysteresis is modeled using a time-delay model, and the actuator's transfer function is identified experimentally by analytically indicating the source of dynamics. Several digital control methodologies are developed for the actuator based upon the model generated. Pole placement, zero phase error tracking, and state feedback control with a disturbance observation model have been developed and cutting tests performed to evaluate their suitability for precision turning. The mathematical model and experimental trials indicate that one to two micrometer displacement can be best achieved using a feed-forward controller with state feedback disturbance observer and rejection. The ability of the system in tracking highly dynamic position commands is also demonstrated by turning elliptical shafts. The identified bandwidth of the actuator is found to be about 500Hz, but the displacement ranged rapidly drops to ~12 μm at the peak frequency Higher dynamic bandwidth and surface finish accuracy can be obtained if the mechanical system is more rigidly designed, and the amplifier has more power to drive the piezoelectric element at higher actuation frequencies.
Development of Ground-testable Phase Fresnel Lenses in Silicon
Creators: name: Krizmanic, John
name: Morgan, Brian
name: Streitmatter, Robert
name: Gehrels, Neil
name: Gendreau, Keith
name: Arzoumanian, Zaven
name: Ghodssi, Reza
name: Skinner, Gerry
Publisher: name: arXiv
Year: 2006
Subjects: subject: Optics (physics.optics)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Diffractive/refractive optics, such as Phase Fresnel Lenses (PFL's), offer the potential to achieve excellent imaging performance in the x-ray and gamma-ray photon regimes. In principle, the angular resolution obtained with these devices can be diffraction limited. Furthermore, improvements in signal sensitivity can be achieved as virtually the entire flux incident on a lens can be concentrated onto a small detector area. In order to verify experimentally the imaging performance, we have fabricated PFL's in silicon using gray-scale lithography to produce the required Fresnel profile. These devices are to be evaluated in the recently constructed 600-meter x-ray interferometry testbed at NASA/GSFC. Profile measurements of the Fresnel structures in fabricated PFL's have been performed and have been used to obtain initial characterization of the expected PFL imaging efficiencies.
description: Presented at GammaWave05: "Focusing Telescopes in Nuclear Astrophysics", Bonifacio, Corsica, September 2005, to be published in Experimental Astronomy, 8 pages, 3 figures
Perceived Risk is Important for Consumers' Acceptance of Genetically Modified Foods, but Trust in Industry not Really: A Means-End Analysis of German Consumers
Creators: name: Boecker, Andreas
name: Boecker, Andreas
Publisher: name: Unknown
Year: 2006
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: Consumer trust
subject: risk perception
subject: technology acceptance
subject: genetically modified foods
subject: laddering

description: Applies the means-end approach to investigate how German consumers relate GM food attributes to values via perceived consequences in their purchase decisions. Analyses in particular the importance of risk-related dimensions and issues of (dis)trust for different levels of purchase intentions. Identifies two segments: rejecters (n=24) and accepters (n=36). Finds considerable similarities in means-end chains between segments, in particular that risk plays a much bigger role than trust for purchase intentions. Furthermore, for both segments the link between trust and risk is found to be weak which implies to reconsider results from previous empirical studies pointing out the strong interaction of trust and perceived risk.
title: Concept design optimization for OSVs operating on the Flemish Pass basin
Creators: name: Boyd, Nicholas
Publisher: name: Memorial University of Newfoundland
Year: 2021

description: Significant oil discoveries in the Flemish Pass Basin off the coast of Newfoundland and Labrador have given rise to interest in studying the capabilities of offshore support vessels (OSVs) to provide logistics support to an operating offshore oil installation. The Flemish Pass Basin represents a departure from current operational environments, characterized by longer distances, deeper waters, and a harsher metocean climate, which raises concerns as to the suitability of existing vessel design configurations. As a result, this study has been performed into the optimization of the design of offshore support vessels, to develop a high-level optimized concept design which can support oil and gas development on the Flemish Pass Basin. First, a high-level review of existing approaches to optimizing the design of OSVs and their logistics was examined. These approaches, though powerful for their individual optimization goals, failed to tie all the optimization requirements and logistics together into a holistic understanding of the most efficient design of hull and fleet to meet the operational requirements. The works presented in this paper show the process used to tie these approaches together into a complete optimization algorithm, to develop a fit for purpose fleet of OSVs. To support this algorithm, a series of computer simulations were performed to develop sets of equations to describe the seakeeping, resistance, and stability performance of OSVs. These simulations were performed on 4 principal hull designs: axe bow, bulbous bow, vertical bow, and X bow, which are representative of many state-of-the-art vessels currently operating. Using the derived equations, a computerized algorithm was developed which takes account of sea state probabilities and operational requirements to relate the vessel performance, downtime, scheduling, and design to minimize fleet annual cost. The algorithm automatically rejects any hull or fleet mix designs which cannot achieve the required delivery performance, and any which due to their excessive speed, weights, or lack of stability could not be operated. A result of running this algorithm showed an optimized OSV design consisting of a fleet of 2 vessels based on the vertical bow hull form, with 100 m length, 25 m beam, and a 4 m draft. In general, the results showed a strong cost efficiency of using large, low displacement hulls and fewer voyages. The sensitivity of the results was studied, and it was found that the algorithm output can significantly vary with little change on the input. Further, the algorithm has a margin of error which can impact which vessel is ultimately recommended, which indicates a need for more detailed studies beyond the concept design phase, to ensure that the optimum design has been selected.
วาทกรรมและบทบาทของนิทานในมิติชาติพันธ์ุสัมพันธ์ุ
Creators: name: วัชราภรณ์ ดิษฐป้าน
Publisher: name: คณะศิลปศาสตร์ มหาวิทยาลัยธรรมศาสตร์
Year: 2015
Subjects: -

description: วรรณวิทัศน์, 15, พิเศษ, 272-318
Energy-Momentum in viscous Kasner-type Universe in Bergmann-Thomson Formulations
Creators: name: Salti, Mustafa
name: Havare, Ali
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This paper has been removed by arXiv administrators because it plagiarizes gr-qc/0303034, "The energy of the universe in teleparallel gravity," by T. Vargas; and gr-qc/0011027, "Viscous cosmologies in scalar-tensor theories for Kasner type metrics," by M. Cataldo, S. del Campo and P. Salgado.
description: This submission has been withdrawn by arXiv administrators due to inappropriate text reuse from external sources
Measuring Behavioural Similarity of Cellular Automata
Creators: name: Turney, Peter D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Cellular Automata and Lattice Gases (nlin.CG)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Conway's Game of Life is the best-known cellular automaton. It is a classic model of emergence and self-organization, it is Turing-complete, and it can simulate a universal constructor. The Game of Life belongs to the set of semi-totalistic cellular automata, a family with 262,144 members. Many of these automata may deserve as much attention as the Game of Life, if not more. The challenge we address here is to provide a structure for organizing this large family, to make it easier to find interesting automata, and to understand the relations between automata. Packard and Wolfram (1985) divided the family into four classes, based on the observed behaviours of the rules. Eppstein (2010) proposed an alternative four-class system, based on the forms of the rules. Instead of a class-based organization, we propose a continuous high-dimensional vector space, where each automaton is represented by a point in the space. The distance between two automata in this space corresponds to the differences in their behavioural characteristics. Nearest neighbours in the space have similar behaviours. This space should make it easier for researchers to see the structure of the family of semi-totalistic rules and to find the hidden gems in the family.
Traceability, Trust and Coordination in a Food Chain
Creators: name: Charlier, Christophe
name: Valceschini, Egizio
name: Charlier, Christophe
name: Valceschini, Egizio
Publisher: name: Unknown
Year: 2006
Subjects: subject: Agribusiness
subject: Industrial Organization
subject: traceability
subject: risk management
subject: food safety

description: In response to sanitary crisis, risk management has become a central issue for food producers and distributors in Europe. Organisational responses to sanitary risks usually implying traceability have been conceived by firms. One of the main tasks here is to deal with coordination of the different operators of a food chain. The European Union has developed a regulatory framework with the Regulation 178/2002. This regulation sets a mandatory traceability considered as a risk management tool. Traceability that was considered as a private initiative has therefore become an obligation with this regulation. This paper tries to evaluate if the problem of the operators' coordination on specific traceability practices that any private organisational of a food chain had to face is solved with the strict application of the Regulation 178/2002. For that, the analysis characterises the mandatory traceability and the operators' responsibilities set by the regulation. The coordination task and the problem of trust that it contains is then described. The analysis shows the limits of the mandatory traceability in this context and suggests a solution.
Design of an acoustic energy distributor using thin resonant slits
Creators: name: Chesnel, Lucas
name: Nazarov, Sergei A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We consider the propagation of time harmonic acoustic waves in a device with three channels. The wave number is chosen such that only the piston mode can propagate. The main goal of this work is to present a geometry which can serve as an energy distributor. More precisely, the geometry is first designed so that for an incident wave coming from one channel, the energy is almost completely transmitted in the two other channels. Additionally, tuning a bit two geometrical parameters, we can control the ratio of energy transmitted in the two channels. The approach is based on asymptotic analysis for thin slits around resonance lengths. We also provide numerical results to illustrate the theory.
Determinants of Trust between Buyers and Suppliers in Agribusiness: Empirical Evidence from the German Pork Sector
Creators: name: Schulze, Birgit
name: Spiller, Achim
name: Schulze, Birgit
name: Spiller, Achim
Publisher: name: Unknown
Year: 2006
Subjects: subject: Agribusiness
subject: Livestock Production/Industries
subject: Satisfaction
subject: reliability
subject: regression analysis
subject: pork chain

description: There are several hints that there is lack of trust in the relationships between farmers and processors in the meat industry. To generate instruments of trust management, a survey is conducted in the German pork chain measuring the level of trust perceived by farmers as well as the antecedents of trust. Overall satisfaction, the perceived neutrality of the carcass grading system, fairness and farmer orientation are the most import factors explaining trust.
Spin-Locality of $η^2$ and $\barη^2$ Quartic Higher-Spin Vertices
Creators: name: Didenko, V. E.
name: Gelfond, O. A.
name: Korybut, A. V.
name: Vasiliev, M. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Higher-spin theory contains a complex coupling parameter $η$. Different higher-spin vertices are associated with different powers of $η$ and its complex conjugate $\bar η$. Using $Z$-dominance Lemma, that controls spin-locality of the higher-spin equations, we show that the third-order contribution to the zero-form $B(Z;Y;K)$ admits a $Z$-dominated form that leads to spin-local vertices in the $η^2$ and $\bar η^2$ sectors of the higher-spin equations. These vertices include, in particular, the $η^2$ and $\bar η^2$ parts of the $ϕ^4$ scalar field vertex.
description: Section 3 extended, clarifications and references added, typos corrected; matches the published version
Trust in ICT-Based New Product Development - Guidelines for Virtual New Product Development Teams
Creators: name: Haas, Rainer
name: Meixner, Oliver
name: Poechtrager, Siegfried
name: Haas, Rainer
name: Meixner, Oliver
name: Poechtrager, Siegfried
Publisher: name: Unknown
Year: 2006
Subjects: subject: Research and Development/Tech Change/Emerging Technologies
subject: e-collaboration
subject: virtual team work
subject: new product development

description: The traditional process of new product development is focusing on an intra-organizational workflow, which should - in its ideal form - be done by virtual interdisciplinary teams. Team members should be from several departments like manufacturing, research & development, sales and marketing. But innovation is happening more and more in networks of companies, clusters or so called network companies. The following article delivers a framework of guidelines for virtual team management in order to improve the success of innovation strategies.
Elicitation of placenames
Creators: name: Parker, Verdena
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: hup

description: Audio file VP-200716-05: elicitation of placenames from the Collected Works of Edward Sapir (CWES) vol. 14, map D (page 1011), items 33 to end.
Information Needs Angehöriger von Menschen mit Schizophrenie
Creators: name: Feller, Lina
Publisher: name: Humboldt-Universität zu Berlin
Year: 2023
Subjects: subject: Information Needs
subject: Informationsbedarf
subject: Informationslücken
subject: Schizophrenie
subject: Teilstrukturierte Leitfadeninterviews
subject: 020 Bibliotheks- und Informationswissenschaften

description: Diese Veröffentlichung geht zurück auf eine Masterarbeit im Studiengang Information Science, M. A. an der Humboldt-Universität zu Berlin.
description: Das Ziel dieser Masterarbeit soll es sein den Information Need Angehöriger von Menschen mit Schizophrenie zu untersuchen. Dabei soll herausgefunden werden, welche Informationsbedarfe vorhanden sind und inwiefern diese zufriedenstellend oder aber unzureichend abgedeckt werden. Das übergeordnete Ziel ist es aus Sicht der Informationswissenschaft ein Stück weit Aufklärungsarbeit hinsichtlich des Umgangs mit psychischen Erkrankungen zu leisten. Auf Grundlage der Ergebnisse dieser Studie sollen Informationslücken erschlossen werden und darauf aufbauend Verbesserungswünsche geäußert werden. Es soll ein besseres Verständnis für den Information Need dieser hier genannten Zielgruppe gewonnen werden.
Dark acoustic oscillations: Imprints on the matter power spectrum and the halo mass function
Creators: name: Schaeffer, Timothée
name: Schneider, Aurel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Many non-minimal dark matter scenarios lead to oscillatory features in the matter power spectrum induced by interactions either within the dark sector or with particles from the standard model. Observing such dark acoustic oscillations would therefore be a major step towards understanding dark matter. We investigate what happens to oscillatory features during the process of nonlinear structure formation. We show that at the level of the power spectrum, oscillations are smoothed out by nonlinear mode coupling, gradually disappearing towards lower redshifts. In the halo mass function, however, the same oscillations remain visible until the present epoch. As a consequence, dark acoustic oscillations could be detectable in observations that are either based on the halo mass function or on the high-redshift power spectrum. We investigate the effect of such oscillations on different observables, namely, the cluster mass function, the stellar-to-halo mass relation, and the Lyman-$α$ flux power spectrum. We find that dark acoustic oscillations remain visible in all of these observables, but they are very extended and of low amplitude, making it challenging to detect them as distinct features in the data.
description: Published in MNRAS
Temporale Aspekte und Provenance-Anfragen im Umfeld des Forschungsdatenmanagements
Creators: name: Meyer, Frank
Publisher: name: Universität Rostock
Year: 2016
Subjects: subject: 004 Data processing Computer sciences

description: Zur Verbesserung der Qualität wissenschaftlicher Arbeiten besteht Interesse an der Rückverfolgbarkeit und Nachnutzung von Forschungsdaten. Die Erhebung von diesen Daten erfolgt einerseits manuell, andererseits automatisiert durch Instrumente und Sensoren der im Forschungsgebiet genutzten Geräte. Das Leibniz-Institut für Ostseeforschung Warnemünde betreibt eine instrumentierte Messplattform (GODESS) zur Untersuchung von physikalischen und chemischen Umweltparametern der Ostsee in verschiedenen Tiefen. Durch den modularen Aufbau und Konfiguration der Plattform ergeben sich Änderungen in den Datenformaten sowie Anpassungen der Auswerte- und Analysefunktionen. Im Kontext von Datenbanken entspricht dies Änderungen des relationalen Datenbankschemas sowie von SQL-Funktionen. In dieser Arbeit wird untersucht, unter welchen Voraussetzungen veränderte SQL-Funktionen auf veränderte Schemata angewendet werden können. Dazu wird im Konzept gezeigt, wie Veränderungen von SQL-Funktionen durch Techniken der temporalen Datenhaltung aufgezeichnet werden können. Das Festhalten und Verfolgen von Schemaänderungen wird zusätzlich skizziert. Danach erfolgt die Untersuchung der Anwendbarkeit von Funktionen auf sich verändernde Schemata sowie die Anwendbarkeit von Funktionen bei Funktionsänderungen. Die Ergebnisse werden zusammenfassend in Form von Tabellen präsentiert. Ferner wird auf Möglichkeiten der automatisierten Kompensation der Änderungen zur Wahrung der weiteren Anwendbarkeit der Funktionen mittels Schemaintegrationstechniken eingegangen. Danach wird der Zusammenhang der Herkunft von Daten und Aspekten der temporalen Datenhaltung beschrieben. Es folgt eine prototypische Umsetzung der Versionierung von SQL-Funktionen. Abschließend wird die Arbeit zusammengefasst und ein Ausblick auf weitere mögliche und weiterführende Themen gegeben.
Filament rotation in the California L1482 cloud
Creators: name: Álvarez-Gutiérrez, Rodrigo H.
name: Stutz, Amelia M.
name: Law, Chi Y.
name: Reissl, Stefan
name: Klessen, Ralf S.
name: Leigh, Nathan W. C.
name: Liu, Hong-Li
name: Reeves, Rodrigo A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We analyze the gas mass distribution, the gas kinematics, and the young stellar object (YSO) content of the California Molecular Cloud (CMC) L1482 filament. We derive a Gaia DR2 YSO distance of 511$^{+17}_{-16}$ pc. We derive scale-free power-laws for the mean gas line-mass (M/L) profiles; we calculate the gravitational potential and field profiles consistent with these. We present IRAM 30 m C$^{18}$O (1-0) (and other tracers) position-velocity (PV) diagrams that exhibit complex velocity twisting and turning structures. We find a rotational profile in C$^{18}$O perpendicular to the southern filament ridgeline. The profile is regular, confined ($r\lesssim0.4$ pc), anti-symmetric, and to first order linear with a break at $r\sim0.25$ pc. The timescales of the inner (outer) gradients are $\sim$0.7 (6.0) Myr. We show that the centripetal force, compared to gravity, increases toward the break; when the ratio of forces approaches unity, the profile turns over, just before filament breakup is achieved. The timescales and relative roles of gravity to rotation indicate that the structure is stable, long lived ($\sim$ a few times 6 Myr), and undergoing outside-in evolution. Moreover, this filament has practically no star formation, a perpendicular Planck plane-of-the-sky (POS) magnetic field morphology, and POS "zig-zag" morphology, which together with the rotation profile lead to the suggestion that the 3D shape is a corkscrew filament with a helical magnetic field. These results, combined with results in Orion and G035.39-00.33, suggest evolution toward higher densities as rotating filaments shed angular momentum. Thus, magnetic fields may be an essential feature of high-mass (M $\sim10^5$ M$_{\odot}$) cloud filament evolution toward cluster formation.
description: 23 pages, 17 figures. Accepted for publication in the Astrophysical Journal
Studying How E-Markets Evaluation Can Enhance Trust in Virtual Business Communities
Creators: name: Manouselis, Nikos
name: Costopoulou, Constantina
name: Sideridis, Alexander B.
name: Manouselis, Nikos
name: Costopoulou, Constantina
name: Sideridis, Alexander B.
Publisher: name: Unknown
Year: 2006
Subjects: subject: Institutional and Behavioral Economics
subject: Marketing
subject: FOS: Economics and business
subject: E-market
subject: metadata
subject: recommender system
subject: virtual community

description: One of the major drawbacks of conducting business online is the raised level of risk associated with business transactions. Potential business partners usually have limited information about each other's reliability or product / service quality before an online transaction. In this paper, we focus on the problem of selecting a trustful electronic market (e-market), in order to perform business transactions with it. In particular, we examine how the decision of selecting an appropriate e-market can be facilitated by an e-market recommendation algorithm. For this purpose, a metadata model for collecting and storing e-market evaluations from the members of a virtual business community in a reusable and interoperable manner is introduced. Then, an e-market recommendation algorithm that can synthesize existing e-market evaluations stored using the metadata model, is designed. Finally, a scenario of how the presented e-market recommendation algorithm can support a virtual agribusiness community of the organic agriculture sector is discussed.
Spherical Deconstruction
Creators: name: Andrews, R. P.
name: Dorey, N.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present evidence that N=1* SUSY Yang-Mills provides a deconstruction of a six-dimensional gauge theory compactified on a two-sphere. The six-dimensional theory is a twisted compactification of N=(1,1) SUSY Yang-Mills theory of the type considered by Maldacena and Nunez (MN). In particular, we calculate the full classical spectrum of the N=1* theory with gauge group U(N) in its Higgs vacuum. In the limit N goes to infinity, we find an exact agreement with the Kaluza-Klein spectrum of the MN compactification.
description: 16 pages
Variational methods for breather solutions of Nonlinear Wave Equations
Creators: name: Mandel, Rainer
name: Scheider, Dominic
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We construct infinitely many real-valued, time-periodic breather solutions of power-type nonlinear wave equations. These solutions are obtained from critical points of a dual functional and they are weakly localized in space. Our abstract framework allows to find similar existence results for the Klein-Gordon equation or biharmonic wave equations.
Voluntary Traceability and Transaction Costs: An Empirical Analysis in the Italian Meat Processing Supply Chain
Creators: name: Banterle, Alessandro
name: Stranieri, Stefanella
name: Baldi, Lucia
name: Banterle, Alessandro
name: Stranieri, Stefanella
name: Baldi, Lucia
Publisher: name: Unknown
Year: 2006
Subjects: subject: Agribusiness
subject: Livestock Production/Industries
subject: traceability
subject: trust
subject: transaction cost
subject: vertical relationships
subject: meat chain

description: This paper analyses voluntary traceability effects on the coordination of the food supply chain from the transaction cost perspective. The analysis concerns Italian firms and makes particular reference to the meat sector. A survey was conducted by questionnaire to assess the changes in key transaction factors and costs after the introduction of traceability. The results underline an increase in the degree of human, material and site asset specificity, and reveal a reduction in the degree of uncertainty in transactions. Growth in some transaction costs related to monitoring is also observed. Factorial and cluster analysis were used to underline the different organisational solutions of the firms.
Test of the isotropy of the speed of light using a continuously rotating optical resonator
Creators: name: Herrmann, Sven
name: Senger, Alexander
name: Kovalchuk, Evgeny
name: Müller, Holger
name: Peters, Achim
Publisher: name: arXiv
Year: 2005
Subjects: subject: Classical Physics (physics.class-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We report on a test of Lorentz invariance performed by comparing the resonance frequencies of one stationary optical resonator and one continuously rotating on a precision air bearing turntable. Special attention is paid to the control of rotation induced systematic effects. Within the photon sector of the Standard Model Extension, we obtain improved limits on combinations of 8 parameters at a level of a few parts in $10^{-16}$. For the previously least well known parameter we find $\tilde κ_{e-}^{ZZ} =(-1.9 \pm 5.2)\times 10^{-15}$. Within the Robertson-Mansouri-Sexl test theory, our measurement restricts the isotropy violation parameter $β-δ-\frac 12$ to $(-2.1\pm 1.9)\times 10^{-10}$, corresponding to an eightfold improvement with respect to previous non-rotating measurements.
description: 4 pages, 3 figures, to appear in Phys. Rev. Lett
title: Contrainte, psychiatrie et alliance thérapeutique
title: Contrainte, psychiatrie et alliance thérapeutique
titleType: AlternativeTitle
Creators: name: Braga Barbosa, Michel
name: Vieira Cristovao, Nuno
Publisher: name: Unknown
Year: 0
Subjects: subject: Contention chimique
subject: Psychiatrie
subject: Ethique
subject: Vécu
subject: Contention
subject: quantitative
subject: Qualitative
subject: Perception des patients
subject: Perception des professionnels de santé & infirmier
subject: hesav tb si

description: Contexte : En psychiatrie adulte, le recours aux mesures de contrainte demeure fréquent (isolement, médication forcée, entraves aux libertés de mouvement, placement aux fins d’assistance). Solution inévitable pour parer aux états de crise, la contrainte soulève des dilemmes éthiques, de l’ambivalence et requiert une vigilance réflexive. But et question de recherche : Quel est l’impact des mesures de contrainte, notamment la médication forcée, sur l’alliance thérapeutique ? Diverses dimensions sont traitées : l’expérience subjective face aux diverses méthodes de contrainte, la satisfaction vis-à-vis des traitements, les circonstances du recours à la contrainte, l’attitude des soignants. Méthode : Cinq articles présentant des études quantitatives réalisées pour l’essentiel dans des pays européens (Allemagne, Espagne, Angleterre, Israël) ont été sélectionnés et analysés à l’aide de la grille Fortin. Ce corpus a été complété par des résultats issus d’une thèse de doctorat en sciences infirmières (Suisse). Résultats : Les pratiques sont très variables d’un pays à l’autre. La médication forcée (injections) est toutefois le moyen de contention qui a l’impact le plus négatif sur le patient (impuissance, tristesse, humiliation, traumatismes). Le peu d’expérience et d’expertise, ainsi que les valeurs des soignants, jouent un rôle dans le recours à la contrainte. Il n’existe pas de preuves scientifiques sur le bénéfice thérapeutique des moyens de contention. Discussion : Les résultats sont discutés à l’aide de la théorie de la conception humaniste du nursing de Paterson & Zderad. Tenir compte de l’avis, de l’expérience passée et des préférences du patient contribue à favoriser l’alliance thérapeutique, à réduire la méfiance et l’incompréhension. Pour la pratique infirmière, il est recommandé d’envisager la supervision externe, les plans de crise conjoint et les alternatives susceptibles de réduire en amont le recours à la contrainte. Conclusion : Les connaissances restent lacunaires sur les réflexions des soignants confrontés à la contrainte, sur la gestion de ces situations au sein des équipes, ainsi que l’influence des cultures institutionnelles sur la variété des pratiques souvent observées.
Trust as a Determinant of Consumer Behaviour in Germany
Creators: name: Dierks, Leef H.
name: Dierks, Leef H.
Publisher: name: Unknown
Year: 2006
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: Institutional and Behavioral Economics
subject: consumer behaviour
subject: uncertainty
subject: food safety
subject: trust

description: Against the background of diverse food scandals this article investigates the role of trust as a determinant of consumer behaviour in Germany. As empirical analyses indicate the impact of trust on consumer behaviour in a quotidian and presumably safe setting is to be neglected. In the environment of a food scandal, however, trust proves to be a crucial element with regard to a more in-depth understanding of consumer behaviour under uncertainty. Moreover, it is analysed whether different values of trust allow for deriving coherent population segments and whether these can likewise be identified on the basis of consumers' socio-economic features.
Managing Perceived Risks through Supply Chain Relationships: An Empirical Study of the UK Beef Sector
Creators: name: Hornibrook, Susan A.
name: Fearne, Andrew
name: Hornibrook, Susan A.
name: Fearne, Andrew
Publisher: name: Unknown
Year: 2006
Subjects: subject: Agribusiness
subject: Livestock Production/Industries
subject: Risk and Uncertainty
subject: contractual relationships
subject: perceived risk
subject: agency theory

description: This study offers an alternative to the traditional Transaction Cost Economics view of the treatment of information by viewing co-ordinated supply chains as a series of Principal-Agent relationships, and draws on Perceived Risk Theory to explain both consumer and organisational behaviour. Using a supply chain methodology, empirical evidence is presented of the perceived risks, associated management strategies and benefits for all members, including consumers/customers, for two co-ordinated supply chains for own brand fresh beef products in the UK, one in the retail sector and one in the foodservice sector. The results conclude that the establishment of the two co-ordinated supply chains reduces perceived risk for consumers and each participating organisation by increasing information on members' goals and behaviour, recognising perceived risk at each point and offering both positive and negative incentives to meet contractual requirements.
The Balance of Risk Management in Business Networks and How to Enhance Trust Towards a Collaborative Food Network
Creators: name: Mau, Markus
name: Mau, Markus
Publisher: name: Unknown
Year: 2006
Subjects: subject: Agribusiness
subject: Risk and Uncertainty
subject: BtoB
subject: information readiness
subject: e-business
subject: quality control

description: The development in food network perspective forces the demand for a proper configuration of the risks that occur from the ongoing trend towards the globalized supply chain. The paper shows the requirement shift through globalized procurement. As an effect towards long distance purchasing activities the direct control of production, logistics processes and processing are out of direct control for most of the person in charge in downstream processes. Process transparency and information readiness are essential to reduce risk in (e-)business networks. Outputs of this requirement are vertical coordinations through interorganizational agencies as EurepGap and IFS. Especially for brand marks relationship management and vertical coordination are needed to secure the continuously high quality of the product. That is directly related to controlling the whole value chain - fulfilling additional traceability requirements in case of risk. A comprehensive control platform for decision makers is required.
Energy Efficiency in Multi-Hop CDMA Networks: a Game Theoretic Analysis Considering Operating Costs
Creators: name: Betz, Sharon
name: Poor, H. Vincent
Publisher: name: arXiv
Year: 2008
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: A game-theoretic analysis is used to study the effects of receiver choice and transmit power on the energy efficiency of multi-hop networks in which the nodes communicate using Direct-Sequence Code Division Multiple Access (DS-CDMA). A Nash equilibrium of the game in which the network nodes can choose their receivers as well as their transmit powers to maximize the total number of bits they transmit per unit of energy spent (including both transmit and operating energy) is derived. The energy efficiencies resulting from the use of different linear multiuser receivers in this context are compared for the non-cooperative game. Significant gains in energy efficiency are observed when multiuser receivers, particularly the linear minimum mean-square error (MMSE) receiver, are used instead of conventional matched filter receivers.
description: To appear in the Proceedings of the 2008 IEEE International Conference on Acoustics, Speech and Signal Processing, Las Vegas, NV, March 30 -- April 4, 2008
Do Government Payments Influence Farm Size and Survival?
Creators: name: Key, Nigel D.
name: Roberts, Michael J.
name: Key, Nigel D.
name: Roberts, Michael J.
Publisher: name: Unknown
Year: 2007
Subjects: subject: Agricultural and Food Policy
subject: Agricultural Finance
subject: Farm Management
subject: agricultural payments
subject: exit rate
subject: farm size
subject: growth
subject: payment limits
subject: survival

description: Using farm-level data from the 1987, 1992, and 1997 Census of Agriculture, this study estimates what effect agricultural payments have had on the likelihood of farm business survival and on farm size. The unique panel data set permits conditioning current farm size on past farm size, which removes much of the individual heterogeneity of farms that could be spuriously correlated with payment levels. Results indicate that between consecutive censuses, past per acre payments have a significant positive effect on farm business survival and a small yet significant influence on the size of continuing farms.
Agricultural Subsidies and Forest Pressure in Malawi's Miombo Woodlands
Creators: name: Fisher, Monica G.
name: Shively, Gerald E.
name: Fisher, Monica G.
name: Shively, Gerald E.
Publisher: name: Unknown
Year: 2007
Subjects: subject: Agricultural and Food Policy
subject: Resource /Energy Economics and Policy
subject: Africa
subject: agricultural intensification
subject: conservation and development
subject: Malawi
subject: tropical deforestation

description: This paper examines impacts of an agricultural subsidy program on forest pressure in Malawi. Using household survey data, we measure the effect on forest product marketing and on forest clearing of Malawi's Starter Pack Scheme (SPS). Regression results show households receiving a free packet of hybrid maize seed and chemical fertilizer (a "starter pack") had lower levels of commercial forest extraction than nonrecipient households. In addition, no measurable effect of starter pack receipt is found on forest clearing decisions, suggesting the program raised agricultural output without encouraging agricultural expansion. Findings thus indicate potential modest improvement in forest condition due to the SPS.
Our children in the landscape : the universal play space
Creators: name: Rodman, Donna M.
Publisher: name: University of British Columbia
Year: 2009

description: A stratified random sample of 93 children, 4 to 10 years old, from 9 different schools in the Greater Vancouver Region was used to determine children's preferences for play environments and play equipment. As well, questionnaires and interviews were used to identify the preferences of their parents, school principals and safety officers as other important influences affecting the choices in the design of school play environments. The results of the study were consistent with a similar one involving children 11 to 16 years old; expressing strong preferences for variety, texture, colour, trees and natural elements such as water and sand. The children's specific comments reflected the effect of their play experiences in areas of social and environmental learning. The comments of the parents, principals and safety officers were focused primarily on safety. The results were integrated to offer design guidelines for playgrounds, parks, and greenways. The guidelines were applied to present a full design for a playground of a school and an adjacent park in a community in the Greater Vancouver Region. As a result of the survey, a design matrix is created which takes a composite list for qualities of good play environments and compares the list to landscape features as having direct or indirect influences. The unique approach reflected a foundation that is comprehensive, interdisciplinary, holistic and universal for accessibility.
Split Two-Higgs-Doublet Model and Neutrino Condensation
Creators: name: Wang, Fei
name: Wang, Wenyu
name: Yang, Jin Min
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We split the two-Higgs-doublet model by assuming very different vevs for the two doublets: the vev is at weak scale (174 GeV) for the doublet Φ_1 and at neutrino-mass scale (10^{-2} \sim 10^{-3} eV) for the doublet Φ_2. Φ_1 is responsible for giving masses to all fermions except neutrinos; while Φ_2 is responsible for giving neutrino masses through its tiny vev without introducing see-saw mechanism. Among the predicted five physical scalars H, h, A^0 and H^{\pm}, the CP-even scalar h is as light as 10^{-2} \sim 10^{-3}eV while others are at weak scale. We identify h as the cosmic dark energy field and the other CP-even scalar H as the Standard Model Higgs boson; while the CP-odd A^0 and the charged H^{\pm} are the exotic scalars to be discovered at future colliders. Also we demonstrate a possible dynamical origin for the doublet Φ_2 from neutrino condensation caused by some unknown dynamics.
description: version in Europhys. Lett. (discussions added)
Experts and Non-experts
Creators: name: Valsecchi, Irene
name: Valsecchi, Irene
Publisher: name: Unknown
Year: 2007
Subjects: subject: Resource /Energy Economics and Policy
subject: Opinion
subject: Expert
subject: Instructions

description: The paper is concerned with the interaction between two agents: an expert, announcing his probability that a particular state of the world will occur, and a non-expert decision-maker, who takes action according to his posterior beliefs. The decision-maker considers the expert an experiment of uncertain reliability and takes the received messages as the outcomes of such an experiment. The model of the expert in the decision-maker's mind bears no relation with any measure of the expert's actual information. The paper shows that messages will be biased, notwithstanding solidarity between the agents. However, the longer the interaction, the less severe will be the bias.
Fractional Aharonov-Bohm oscillation of a two-layer ring with two electrons
Creators: name: He, Yanzhang
name: Bao, Chengguang
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: When a circular ring suffers a special topological transformation, it becomes a two-layer ring. Due to the special topology of the two-layer ring, orbital angular momenta are allowed to be a half-integer, this would affect the traditional Aharonov-Bohm oscillation (ABO). In this paper the fractional ABO of the ground state energy, persistent current, and dipole transition of a two-layer ring with two electrons has been studied. Collective and internal coordinates $θ_{C}$ and $ϕ$ have been introduced. Based on them a very simple formula for the current has been obtained, the symmetry constraint imposed on the dipole transition has been clarified, a strict relation between the photon energies of the dipole radiation and the persistent current of the ground state has been found. Comparing with the one-layer rings, the period of the fractional ABO of the two-layer rings becomes much shorter.
description: 5 pages, 6 figures, submitted
Analysis of the Brazilian-Portuguese Content on Autism Spectrum Disorder Available on YouTube Videos
Creators: name: Cavalcante, Júlia Cortes
name: Sales, Marina Faria
name: de Sousa, Ricardo Rodrigues
name: Souto, Deisiane Oliveira
name: Gonçalves, Rejane Vale
name: Camargos, Ana Cristina Resende
name: Leite, Hércules Ribeiro
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Space Science
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Environmental Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Science Policy

description: Information about Autism Spectrum Disorder (ASD) is available in different videos on YouTube. However, these videos might present inaccurate or outdated information. The aims of this study were to 1) identify characteristics of Brazilian-Portuguese videos about ASD (i.e., type of content, number of views, likes, and dislikes); 2) analyze the content of informative videos about ASD, by assessing their trustworthiness and overall quality; and 3) investigate the most popular topics of informative videos about ASD over time. This is a cross-sectional study that investigated Brazilian-Portuguese ASD content on YouTube. Videos were selected by two examiners and categorized as experiential or informative. The Discern checklist and the Global Quality Score (GQS) were used to analyze the trustworthiness and quality of informative videos. In total, 216 videos were analyzed, of which 19.5% and 85% were classified as experiential and informative, respectively. The majority of informative videos presented moderate trustworthiness and quality. Videos about ASD clinical aspects were the most popular. YouTube offers a large number of experiential and informative videos on ASD. However, some of these videos fail to present reliable and additional sources of information for stakeholders. Efforts to promote knowledge translation about ASD on YouTube are necessary.
Formation of Magnetically Supported Disks During Hard-to-Soft Transition in Black Hole Accretion Flows
Creators: name: Machida, Mami
name: Nakamura, Kenji
name: Matsumoto, Ryoji
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We carried out three-dimensional global resistive magnetohydrodynamic (MHD) simulations of the cooling instability in optically thin hot black hole accretion flows by assuming bremsstrahlung cooling. General relativistic effects are simulated by using the pseudo-Newtonian potential. Cooling instability grows when the density of the accretion disk becomes sufficiently large. We found that as the instability grows the accretion flow changes from an optically thin, hot, gas pressure-supported state (low/hard state) to a cooler, magnetically supported, quasi-steady state. During this transition, magnetic pressure exceeds the gas pressure because the disk shrinks in the vertical direction almost conserving the toroidal magnetic flux. Since further vertical contraction of the disk is suppressed by magnetic pressure, the cool disk stays in an optically thin, spectrally hard state. In the magnetically supported disk, the heating rate balances with the radiative cooling rate. The magnetically supported disk exists for time scale much longer than the thermal time scale and comparable to the accretion time scale. We examined the stability of the magnetically supported disk analytically, assuming that the toroidal magnetic flux is conserved, and found it thermally and secularly stable. Our findings may explain why black hole candidates stay in luminous, X-ray hard state even when their luminosity exceeds the threshold for the onset of the cooling instability.
description: Accepted to PASJ, 27 pages, 8 figures. For higher resolution figures, see http://th.nao.ac.jp/~mami/pasj05/