cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Intervju med Moen, Reidar
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1975
Subjects: Moen, Reidar

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Om forsøk på kontakt med sentralkomiteen i NKP i Valdresområdet i mai 1944. Spredning av avisa Friheten i Trondheim.
Complexity and Momentum
Creators: name: Susskind, Leonard
name: Zhao, Ying
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Previous work has explored the connections between three concepts -- operator size, complexity, and the bulk radial momentum of an infalling object -- in the context of JT gravity and the SYK model. In this paper we investigate the higher dimensional generalizations of these connections. We use a toy model to study the growth of an operator when perturbing the vacuum of a CFT. From circuit analysis we relate the operator growth to the rate of increase of complexity and check it by complexity-volume duality. We further give an empirical formula relating complexity and the bulk radial momentum that works from the time that the perturbation just comes in from the cutoff boundary, to after the scrambling time.
description: 14 pages, 3 figures
Early Dark Energy Cosmologies
Creators: name: Doran, Michael
name: Robbers, Georg
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We propose a novel parameterization of the dark energy density. It is particularly well suited to describe a non-negligible contribution of dark energy at early times and contains only three parameters, which are all physically meaningful: the fractional dark energy density today, the equation of state today and the fractional dark energy density at early times. As we parameterize Omega_d(a) directly instead of the equation of state, we can give analytic expressions for the Hubble parameter, the conformal horizon today and at last scattering, the sound horizon at last scattering, the acoustic scale as well as the luminosity distance. For an equation of state today w_0 < -1, our model crosses the cosmological constant boundary. We perform numerical studies to constrain the parameters of our model by using Cosmic Microwave Background, Large Scale Structure and Supernovae Ia data. At 95% confidence, we find that the fractional dark energy density at early times Omega_early < 0.06. This bound tightens considerably to Omega_early < 0.04 when the latest Boomerang data is included. We find that both the gold sample of Riess et. al. and the SNLS data by Astier et. al. when combined with CMB and LSS data mildly prefer w_0 < -1, but are well compatible with a cosmological constant.
description: 6 pages, 3 figures; references added, matches published version
Intervju med Mogstad, Ole
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1975
Subjects: Mogstad, Ole

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Omhandler blant annet medlemskap i AUF for å radikalisere på 1930-tallet, medlemskap i Ravn, forhør hos Henrik Rogstad, møte med Alfred Warnes og Henry Thingstad, illegale aviser, arrestasjon, "NKP-sache". Biografiske opplysninger.
Classical memory effects on spin dynamics in two-dimensional systems
Creators: name: Lyubinskiy, I. S.
name: Kachorovskii, V. Yu.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We discuss classical dynamics of electron spin in two-dimensional semiconductors with a spin-split spectrum. We focus on a special case, when spin-orbit induced random magnetic field is directed along a fixed axis. This case is realized in III-V-based quantum wells grown in [110] direction and also in [100]-grown quantum wells with equal strength of Dresselhaus and Bychkov-Rashba spin-orbit couplings. We show that in such wells the long-time spin dynamics is determined by non-Markovian memory effects. Due to these effects the non-exponential tail $1/t^2$ appears in the spin polarization.
description: 4 pages, 1 figure
ALTERNATIVE MODELS FOR THE FUTURE OF PORK PRODUCTION
Creators: name: Ginder, Roger G.
name: Ginder, Roger G.
Publisher: name: Unknown
Year: 1998
Subjects: Livestock Production/Industries

description: Structural changes now occurring in agriculture have led to a bifurcated pork channel. One side of the channel is characterized by "commodity" hogs produced by traditional independent producers, nonintegrated contractors, partially integrated contractors and independent producer networks. The other side is characterized by more industrialized producers with integrated genetics, production and slaughter. Both sides will tend toward greater consistency and higher yielding carcasses. However, the commodity side will concentrate more on providing packer values while the specialty or industrialized side will tend more towards final consumer values. The dual channel is not static. To date, many of the potential consumer market opportunities possible on the specialty side remain untapped. The future viability of the various types of producers has been an open question. There have been concerns about whether the traditional producer is viable. Some maintain that larger specialized operations enjoy a cost advantage over traditional producers while others dispute this contention. In the final analysis the investment patterns may provide the best prediction of which type of operation will own the industry in the future. At present, the majority of new investment on the commodity side has been made by the nonintegrated and partially integrated contractors. Virtually all the new investments on the specialty side have been made by the firms which have more fully integrated production and slaughter.
Non-Linear Realisation of the Pure N=4, D=5 Supergravity
Creators: name: Yilmaz, N. T.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We perform the non-linear realisation or the coset formulation of the pure N=4, D=5 supergravity. We derive the Lie superalgebra which parameterizes a coset map whose induced Cartan-Maurer form produces the bosonic field equations of the pure N=4, D=5 supergravity by canonically satisfying the Cartan-Maurer equation. We also obtain the first-order field equations of the theory as a twisted self-duality condition for the Cartan-Maurer form within the geometrical framework of the coset construction.
description: 12 pages
XII Coloquio nacional y X internacional de Metodología de la Investigación en Ciencias Sociales y educación | Agenda
Creators: name: Valencia González, Gloria Clemencia
name: Ortiz Padilla, Myriam Esther
Publisher: name: Zenodo
Year: 2024
Subjects: Educación
Ciencias Sociales
Coloquio
RedMet Nodo Colmbia

description: El coloquio nacional e internacional de metodología de la investigación en Ciencias Sociales ha venido desarrollándose por 12 años como espacio para con-versar y socializar sobre perspectivas y experiencias alrededor de problemas sociales y educativos en territorio y desde los territorios y sus implicaciones parala perviviencia y la supervivencia de las culturas y sus relaciones con el poder. Sin perder de vista en el horizonte, la reciente pandemia, advertimos la urgenciaque toca la humanidad, de recordar-nos la fragilidad de la vida humana,volviendo a considerar en primer plano los desafíos de una autonomía dependiente, aún en elaboración, donde las tramas de relación de lo vivo y lo vital reafirman su multi-referencialidad, multicausalidad y multi-relacionalidad con la economía y la política, como ámbitos de trámite de lo colectivo que inciden en la cualidad y conservación de la vida en planeta.

Se reafirma en este contexto el valor de reflexionar los problemas humanos emergentes, los problemas amplificados, los problemas transformados, así como los modos, las lógicas y los lugares desde los cuales los nombramos, los transitamos y generamos conocimiento sobre ellos. Del mismo modo que se reactualizan las preguntas por las geopolíticas del conocimiento. El espíritu de la Red Latinoamericana de Metodología de la Investigación (RedMet) en general y del Nodo Colombia en particular, es la articulación de intereses de investigadores/as y respaldos institucionales, que se unen para versar colectivamente sobre las lógicas con las cuales pensamos los problemas y los modos y herramientas con los cuales los enfrentamos.
Intervju med Nilsen, Hjalmar
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1974
Subjects: Nilsen, Hjalmar

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Omhandler blant annet medlemskap i Vestkanten AUL, politisk syn, samarbeid med Henry Thingstad, kontakt med Garberg i Selbu, om aktiviteten utover 1940, kommunistenes illegale apparat, kontakt med Rinnan, om ledelsen av kommunistenes organisasjon, Reidar Wærdahl, Tormod Johnsen, Øistein Johnsen, Carsten Wærdahl, medlemskap i NKP i 1940 eller 1941, møte hos Warnes, stensilering av illegalt materiell, dannelsen av grupper, om idrettslagene og deres betydning for motstandskampen i Trondheim, kontakt med sentralen i Oslo, reaksjon på arrestasjonen av Henry Thingstad, Thingstads rolle i det illegale arbeidet, om andre vesentlige kontakter som Arne Gauslå og Wærdahl-brødrene og kontaktnettet i Trøndelag, bevæpning, samarbeid med Øystein Langseth, spaniakjemper Arthur Iversen, ikke-angrepspakten. Biografiske opplysninger.
Intervju med Nossum, Erling
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1975
Subjects: Nossum, Erling

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Omhandler blant annet Ungdommens Spaniakomité, 1. og 17. mai 1939, ikke-angrepspakten, Finlandskrigen, illegalt arbeid, motstandskamp, Rinnan, arrestasjon, Vollan, idrett. Biografiske opplysninger.
A simple method to construct exact density-potential pairs from a homeoidal expansion
Creators: name: Ciotti, L.
name: Bertin, G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We start from a study of the density-potential relation for classical homeoids in terms of an asymptotic expansion for small deviations from spherical symmetry. We then show that such expansion is a useful device that allows us to construct a variety of exact density-potential pairs with spheroidal, toroidal, or triaxial shapes for which the deviation from spherical symmetry is finite. As concrete analytical applications, we describe: (1) The construction of a family of toroidal axisymmetric density-potential pairs one of which is associated with a perfectly flat rotation curve (for a member of this family, the supporting two-integral phase-space distribution function is obtained in closed form); (2) The determination of the aperture velocity dispersion in a wide class of two-integral axisymmetric models not stratified on homeoids with central black hole, which may be useful for the discussion of the dynamical contributions to the characteristics of the Fundamental Plane of early-type galaxies; and (3) For such class of models, the construction of the v/sigma-ellipticity relation, often considered to assess the role of rotation in the structure of elliptical galaxies.
description: 22 pages, 3 figures, accepted by A&A
STRUCTURE OF WAGES AND BENEFITS IN THE U.S. PORK INDUSTRY
Creators: name: Hurley, Terrance M.
name: Kliebenstein, James B.
name: Orazem, Peter F.
name: Hurley, Terrance M.
name: Kliebenstein, James B.
name: Orazem, Peter F.
Publisher: name: Unknown
Year: 1996
Subjects: Labor and Human Capital
Livestock Production/Industries

description: Pork production has been evolving from relatively small, family-run operations toward large-scale operations with several employees. This study uses a national survey of pork producers and their employees to answer several questions about the structure of wages and benefits in this rapidly changing labor market. The findings include: 1) wages do not differ across regions of the country but, instead, reflect differences in worker skills and firm size consistent with a nationally competitive labor market; 2) there is no evidence that large producers have market power in local labor markets that enable them to pay lower wages than competitors; 3) rather; large firms pay higher wages, offer better benefits, and safer working environments than smaller firms; 4) the wage premiums in larger firms seem to be partly explained by the greater use of skill- intensive technologies in large firms; 5) the remaining wage premium in large firms seems to be consistent with returns to scale that are partly shared with labor; 6) salary, benefits, and a safe working environment all contribute to worker job satisfaction so that firms offering better working conditions and benefits can pay lower salaries than competitors with fewer benefits or inferior working environments.
Intervju med Nossum, Ingemar
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1974
Subjects: Nossum, Ingemar

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Omhandler blant annet Ungdommens Spaniakomité, Else Vöpperfeldt, IOGT-møte, Mette Linge, motstandskamp, Falstad, Unterscharführer Hachen. Avisutklipp 60-årsdagen.
Feedback mechanisms for self-organization to the edge of a phase transition
Creators: name: Buendía, Victor
name: di Santo, Serena
name: Bonachela, Juan A.
name: Muñoz, Miguel A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: Scale-free outbursts of activity are commonly observed in physical, geological, and biological systems. The idea of self-organized criticality (SOC), introduced back in 1987 by Bak, Tang and Wiesenfeld suggests that, under certain circumstances, natural systems can seemingly self-tune to a critical state with its concomitant power-laws and scaling. Theoretical progress allowed for a rationalization of how SOC works by relating its critical properties to those of a standard non-equilibrium second-order phase transition that separates an active state in which dynamical activity reverberates indefinitely, from an absorbing or quiescent state where activity eventually ceases. Here, we briefly review these ideas as well as a recent closely-related concept: self-organized bistability (SOB). In SOB, the very same type of feedback operates in a system characterized by a discontinuos phase transition, which has no critical point but instead presents bistability between active and quiescent states. SOB also leads to scale-invariant avalanches of activity but, in this case, with a different type of scaling and coexisting with anomalously large outbursts. Moreover, SOB explains experiments with real sandpiles more closely than SOC. We review similarities and differences between SOC and SOB by presenting and analyzing them under a common theoretical framework, covering recent results as well as possible future developments. We also discuss other related concepts for "imperfect" self-organization such as "self-organized quasi-criticality" and "self-organized collective oscillations", of relevance in e.g. neuroscience, with the aim of providing an overview of feedback mechanisms for self-organization to the edge of a phase transition.
THE ADEQUACY OF RURAL CAPITAL MARKETS: PUBLIC PURPOSE AND POLICY OPTIONS
Creators: name: Edelman, Mark A.
name: Edelman, Mark A.
Publisher: name: Unknown
Year: 1997
Subjects: subject: Community/Rural/Urban Development
subject: Financial Economics
subject: Financial markets
subject: capital markets
subject: rural finance
subject: rural capital
subject: risk capital
subject: equity capital
subject: venture capital
subject: debt capital
subject: farm credit system
subject: banks
subject: Farmer Mac
subject: Federal Home Loan Bank
subject: rural finance policy

description: This testimony highlights the author's observations regarding gaps in rural financial markets as they relate to rural develop and legislative opportunities for addressing the gaps identified. The observations are based on the author's experiences and literature reviewed as a member of two national expert panels organized by the Rural Policy Research Institute to provide policy makers and staff with analysis on (1) alternative proposals for the rural development title of the 1996 farm bill and (2) the adequacy of rural financial markets in support of rural development.
AN ANALYSIS OF COSTS BY SIZE OF JAIL FOR SELECTED COUNTIES IN IOWA
Creators: name: Edelman, Mark A.
name: Mayer, Adrian J.
name: Edelman, Mark A.
name: Mayer, Adrian J.
Publisher: name: Unknown
Year: 1997
Subjects: subject: Public Economics
subject: Jails
subject: costs
subject: economies of size
subject: community jails
subject: regional jails
subject: corrections

description: Officials from eight counties selected according to jail size were interviewed. Parameters from site visits were used to estimate jail costs. The jails selected ranged in capacity from 5 to 41 prisoners. In addition, costs from the sample of local jails were compared to costs from studies of larger jails and state prisons. Jails with 5 to 41 bed capacity exhibited a U-shaped cost curve. Jail costs varied from a low of $35.20 per prisoner day for the 10 bed jail to $56.63 per prisoner day for the 40 bed jail. Therefore, costs vary by $21.43 per prisoner day for the sample of local jails examined in this study. The threshold economies of size achieved by smaller jails is due primarily to the shared staffing systems, a high degree of integration between jail functions and law enforcement / communications dispatcher functions, and variation in square footage of space per inmate.
The role of management information systems in improving functional performance
Creators: name: Mohamed, Guettab
name: Morad, Aidi
name: Bourzama, Djamal
Publisher: name: Zenodo
Year: 2024
Subjects: Management Information Systems - Improving functional performance - Directorate of Youth and Sports

description: The aim of this study is to identify the role of management information systems in improving functional performance in the Directorate of Youth and Sports in Chlef town, and for this purpose we used the descriptive approach on a sample of (110) employees, chosen randomly. The study concluded that there is a positive and significant impact relationship of management information systems on improving the functional performance of employees at the level of the directorate, and on this basis the study recommended the necessity ofcontinuous development and updating of management information systems used in the Directorate of Youth and Sports in the Chlef town to match the changes and Recent technological developments
Intervju med Nysetvold, Birger
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1975
Subjects: Nysetvold, Birger

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Biografiske opplysninger. Omhandler blant annet kommunistene i Haltdalen, Nysetvolds forhold til kommunismen, illegalt arbeid, Aunegrenda og illegal aktivitet, Nysetvolds egen rolle.
Evaluation of free energy landscapes from manipulation experiments
Creators: name: Imparato, A.
name: Peliti, L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: A fluctuation relation, which is an extended form of the Jarzynski equality, is introduced and discussed. We show how to apply this relation in order to evaluate the free energy landscape of simple systems. These systems are manipulated by varying the external field coupled with a systems' internal characteristic variable. Two different manipulation protocols are here considered: in the first case the external field is a linear function of time, in the second case it is a periodic function of time. While for simple mean field systems both the linear protocol and the oscillatory protocol provide a reliable estimate of the free energy landscape, for a simple model ofhomopolymer the oscillatory protocol turns out to be not reliable for this purpose. We then discuss the possibility of application of the method here presented to evaluate the free energy landscape of real systems, and the practical limitations that one can face in the realization of an experimental set-up.
Four-fold anisotropy of the parallel upper critical magnetic field in a pure layered d-wave superconductor at $T = 0$
Creators: name: Lebed, Andrei G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: It is well known that a four-fold symmetry of the parallel upper critical magnetic field disappears in the Ginzburg-Landau (GL) region in quasi-two-dimensional (Q2D) $d$-wave superconductors. Therefore, it has been accurately calculated so far as a correction to the GL results, which is valid close to superconducting transition temperature and is expected to be stronger at low temperatures. As to the case $T=0$, some approximated methods have been used, which are good only for closed electron orbits and unappropriate for the open orbits which exist in a parallel magnetic field in Q2D superconductors. For the first time, we accurately calculate the four-fold anisotropy of the parallel upper critical magnetic field in a pure Q2D $d$-wave superconductor at $T=0$, where it has the highest possible value. Our results are applicable to Q2D $d$-wave high-Tc and organic superconductors.
description: 5 pages, 2 figeres
Who should get the vaccine first? A glimpse at COVID-19 vaccination prioritization strategies
Creators: name: Askarian, Mehrdad
name: Erfani, Amirhossein
name: Taghrir, Mohammad Hossein
Publisher: name: IfADo - Leibniz Research Centre for Working Environment and Human Factors, Dortmund
Year: 2021
Subjects: COVID-19
vaccine
public health
health policy

description: EXCLI Journal; 20:Doc661; ISSN 1611-2156
Intervju med Næsgaard, Alf
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1974
Subjects: Næsgaard, Alf

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Omhandler blant annet hendelser før krigen som splittelse i AIF, Kampforbundet. Henry Thingstad, Alf Birger Næsgaard, Uredd, om kommunistenes initiativ, Rinnan, Ivar Grande.
A Bayesian Implementation of the Standard Optimal Hedging Model: Parameter Estimation Risk and Subjective Views
Creators: name: Shi, Wei
name: Irwin, Scott H.
name: Shi, Wei
name: Irwin, Scott H.
Publisher: name: Unknown
Year: 2005
Subjects: subject: Marketing
subject: FOS: Economics and business

description: We develop a Bayesian implementation of the standard optimal hedging model to analyze the impact of hedgers' subjective views on their hedging behavior. The results show the subjective views have a substantial impact on hedgers' optimal positions, explaining the large cross-sectional and time series variation of hedging positions in practice.
Pinning by a sparse potential
Creators: name: Janvresse, Élise
name: De La Rue, Thierry
name: Velenik, Yvan
Publisher: name: arXiv
Year: 2005
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: AMS 60K35 60K37 82B41

description: We consider a directed polymer interacting with a diluted pinning potential restricted to a line. We characterize explicitely the set of disorder configurations that give rise to localization of the polymer. We study both relevant cases of dimension 1+1 and 1+2. We also discuss the case of massless effective interface models in dimension 2+1.
description: to appear in Stochastic Processes and their Applications
Intervju med Olsen, Harald A.
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1975
Subjects: Olsen, Harald A.

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Omhandler blant annet Ørnulf og kommunister, Vestbyen idrettslag, Spartakus, arrestasjon. Biografiske opplysninger.
Intervju med Olsen, Odd
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1974
Subjects: Olsen, Odd

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Omhandler blant annet medlemskap i AUF på Løkken, Finlandskrigen, illegalt arbeid, Rinnan, Arne Lund, arrestasjoner, flytting til Trondheim 1943, Løkken verk, arbeid på Øysand, militært arbeid. I tillegg: Notater om min deltaktelse i illegal virksomhet og opplevelser i tysk fangenskap.
Intervju med Olsen, Rolf Boye
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1974
Subjects: Olsen, Rolf Boye

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Omhandler blant annet partitilhørighet, illegalt arbeid, Håndtverkerforeningen, kor, innsamlingsarbeid og journalist Kleveland.
Effects of geometric frustration in Kitaev chains
Creators: name: Maiellaro, Alfonso
name: Romeo, Francesco
name: Citro, Roberta
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study the topological phase transitions of a Kitaev chain in the presence of geometric frustration caused by the addition of a single long-range hopping. The latter condition defines a legged-ring geometry (Kitaev tie) lacking of translational invariance. In order to study the topological properties of the system, we generalize the transfer matrix approach through which the emergence of Majorana modes is studied. We find that geometric frustration gives rise to a topological phase diagram in which non-trivial phases alternate with trivial ones at varying the range of the extra hopping and the chemical potential. Frustration effects are also studied in a translational invariant model consisting of multiple-ties. In the latter system, the translational invariance permits to use the topological bulk invariant to determine the phase diagram and bulk-edge correspondence is recovered. It has been demonstrated that geometric frustration effects persist even when translational invariance is restored. These findings are relevant in studying the topological phases of looped ballistic conductors.
description: 9 pages, 9 figures
A Stochastic-Dynamic Model of Costly Reversible Technology Adoption
Creators: name: Baerenklau, Kenneth A.
name: Knapp, Keith C.
name: Baerenklau, Kenneth A.
name: Knapp, Keith C.
Publisher: name: Unknown
Year: 2005
Subjects: subject: Research and Development/Tech Change/Emerging Technologies
subject: dynamic optimization
subject: irrigation
subject: reversible
subject: technology adoption
subject: water

description: We develop a stochastic-dynamic model of technology adoption that imposes fewer restrictions on behavior than do previous studies of similar decision problems. Like these previous studies, our model is forward-looking and can be used to demonstrate the additional "hurdle rate" that must be met before adoption will take place when the future state of the world is uncertain. Unlike these previous studies, our approach does not impose the untenable assumptions that investment in a new technology is irreversible or that technologies have unlimited useful lifetimes. Rather, we address the more reasonable situation of costly reversibility and limited lifetimes. Our solution method utilizes Bellman's equation and standard dynamic programming techniques. Similar methods have been used previously to examine irreversible investment and adoption problems, but to our knowledge no application to costly reversible adoption has yet to appear in the literature. Our behavioral simulations, calibrated for irrigated cotton farming in California's San Joaquin Valley, demonstrate that the more restrictive approach can produce significant model prediction errors and can overlook important features of the adoption problem when decisions are reversible and technologies eventually become obsolete. Policy implications are discussed.
Cauchy-perturbative matching revisited: tests in spherical symmetry
Creators: name: Zink, Burkhard
name: Pazos, Enrique
name: Diener, Peter
name: Tiglio, Manuel
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: During the last few years progress has been made on several fronts making it possible to revisit Cauchy-perturbative matching (CPM) in numerical relativity in a more robust and accurate way. This paper is the first in a series where we plan to analyze CPM in the light of these new results. Here we start by testing high-order summation-by-parts operators, penalty boundaries and contraint-preserving boundary conditions applied to CPM in a setting that is simple enough to study all the ingredients in great detail: Einstein's equations in spherical symmetry, describing a black hole coupled to a massless scalar field. We show that with the techniques described above, the errors introduced by Cauchy-perturbative matching are very small, and that very long term and accurate CPM evolutions can be achieved. Our tests include the accretion and ring-down phase of a Schwarzschild black hole with CPM, where we find that the discrete evolution introduces, with a low spatial resolution of Δr = M/10, an error of 0.3% after an evolution time of 1,000,000 M. For a black hole of solar mass, this corresponds to approximately 5 s, and is therefore at the lower end of timescales discussed e.g. in the collapsar model of gamma-ray burst engines. (abridged)
description: 14 pages, 20 figures
Intervju med Olsen, Sverre
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1975
Subjects: Olsen, Sverre

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Biografiske opplysninger. Omhandler blant annet Njardar, Spania, Finlandskrigen, Henry Thingstad, AIF, Rinnan.
Import demand of Bananas in the European Union
Creators: name: Marsh, Thomas L.
name: Chacon-Cascante, Adriana
name: Crespi, John M.
name: Marsh, Thomas L.
name: Chacon-Cascante, Adriana
name: Crespi, John M.
Publisher: name: Unknown
Year: 2005
Subjects: International Relations/Trade

description: The EU banana market has been of enormous interest for researchers for a long time, especially after the import policy unification brought by the Common Market Organization for Bananas (CMOB) in 1993. Empirical evidence suggests that the CMOB and its subsequent modifications have been highly distorting. However, the quantifications made of those distortions by different authors vary a lot, not only in magnitude but also in direction. The reason is that for each evaluation, a different system of demand equations has been estimated. However, besides the different models used, there is one common denominator to all models. They do not incorporate the general restrictions (homogeneity, symmetry and adding up) necessary to make the demand estimations consistent with economic theory. In this paper we estimate the almost ideal demand system (AIDS) to calculate more reliable elasticities to facilitate future welfare analysis of the EU banana market. The inverse almost ideal demand system (IAIDS) was also estimated under the alternative assumption that import prices adjust to quantities instead to quantities adjusting to price variations as it has usually assumed. However, the results are not reported because due to the upcoming import policy and its subsequent quota elimination, quantities will not longer be predetermined. Preliminary results show that demand elasticities are different depending on the region of origin of the imported bananas. Latin American bananas are substitutes of bananas from preferred suppliers and complements of others while imports from the ACP are substitutes of all regions. EU bananas behave similar to Latin American in the sense that they are substitutes of all by other suppliers. Preliminary welfare analysis of the proposed policy shows that both Latin American producers and EU consumers of Latin American bananas will lost from the quota elimination and increase in the tariff level.
Classes of integrable spin systems
Creators: name: Steinigeweg, Robin
name: Schmidt, Heinz-Jürgen
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences
subject: 70H06, 37J35, 81Q05, 94C15, 82D40

description: We investigate certain classes of integrable classical or quantum spin systems. The first class is characterized by the recursively defined property $P$ saying that the spin system consists of a single spin or can be decomposed into two uniformly coupled or disjoint subsystems with property $P$. For these systems the time evolution can be explicitely calculated. The second class consists of spin systems where all non-zero coupling constants have the same strength (spin graphs) possessing $N-1$ independent, commuting constants of motion of Heisenberg type. These systems are shown to have the above property $P$ and can be characterized as spin graphs not containing chains of length four. We completely enumerate and characterize all spin graphs up to N=5 spins. Applications to the construction of symplectic numerical integrators for non-integrable spin systems are briefly discussed.
Crossed product of a C*-algebra by a semigroup of endomorphisms generated by partial isometries
Creators: name: Kwasniewski, B. K.
name: Lebedev, A. V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 46L05, 47B99

description: The paper presents a construction of the crossed product of a C*-algebra by a semigroup of endomorphisms generated by partial isometries.
description: 22 pages
Nöllenburg, Wilhelm / Stubbe, Heinrich, Wo die Erde aufhört
Creators: name: Bartelt, Johannes
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 13 Nr. 4 (1964): Ökumenische Rundschau, Band 13, Heft 4
Equivalence of Many-Gluon Green Functions in Duffin-Kemmer-Petieu and Klein-Gordon-Fock Statistical Quantum Field Theories
Creators: name: Pimentel, B. M.
name: Fainberg, V. Ya.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We prove the equivalence of many-gluon Green functions in Duffin-Kemmer-Petieu and Klein-Gordon-Fock statistical quantum field theories. The proof is based on the functional integral formulation for the statistical generating functional in a finite-temperature quantum field theory. As an illustration, we calculate one-loop polarization operators in both theories and show that their expressions indeed coincide.
description: 8 pages
Intervju med Olsen, Øystein
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1975
Subjects: Olsen, Øystein

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Omhandler blant annet borgerkrigen i Spania, samarbeid i Østbyen, Henry Thingstad, Ungdommens Spaniakomité, illegal virksomhet fra sommeren 1940, Spartacus, Ørnulf, frigjøring. Biografiske opplysninger.
A Differential Examination of the Effect of Mandatory Country of Origin of Labeling on the Beef Sector
Creators: name: Schmitz, Andrew
name: Moss, Charles B.
name: Schmitz, Troy G.
name: Schmitz, Andrew
name: Moss, Charles B.
name: Schmitz, Troy G.
Publisher: name: Unknown
Year: 2005
Subjects: Consumer/Household Economics

description: The introduction of mandatory country of origin labeling in the agricultural sector promises to yield consumer benefits by providing additional information to consumers. However, these benefits will be partially offset by the cost of labeling paid by producers. This study derives the labeling cost required to offset consumer gains from labeling.
Three-dimensional spatiotemporal optical solitons in nonlocal nonlinear media
Creators: name: Mihalache, D.
name: Mazilu, D.
name: Lederer, F.
name: Malomed, B. A.
name: Kartashov, Y. V.
name: Crasovan, L. -C.
name: Torner, L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We demonstrate the existence of stable three-dimensional spatiotemporal solitons (STSs) in media with a nonlocal cubic nonlinearity. Fundamental (nonspinning) STSs forming one-parameter families are stable if their propagation constant exceeds a certain critical value, that is inversely proportional to the range of nonlocality of nonlinear response. All spinning three-dimensional STSs are found to be unstable.
description: 14 pages, 6 figures, accepted to PRE, Rapid Communications
Farm size and nonparametric efficiency measurements for coffee farms in Vietnam
Creators: name: Rios, Ana R.
name: Shively, Gerald E.
name: Rios, Ana R.
name: Shively, Gerald E.
Publisher: name: Unknown
Year: 2005
Subjects: Farm Management

description: We study the efficiency of smallholder coffee farms in Vietnam. Data from a 2004 survey of farms in two districts in Dak Lak Province are used in a two-step analysis. In the first step, technical and cost efficiency measures are calculated using DEA. In the second step, Tobit regressions are used to identify factors correlated with technical and cost inefficiency. Results indicate that small farms were less efficient than large farms. Inefficiencies observed on small farms appear to be related, in part, to the scale of investments in irrigation infrastructure.
Temporal properties of self-timed rings
Creators: name: Winstanley, Anthony J.
Publisher: name: University of British Columbia
Year: 2009

description: Various researchers have proposed using self-timed networks to generate and distribute clocks and other timing signals. I consider one of the simplest self-timed networks, a ring, and note that for timing applications, self-timed rings should maintain uniform spacing of events. In practice, all previous designs of which I am aware cluster events into bursts. This thesis describes a dynamical systems approach to analyze the temporal properties of self-timed rings. This method is used to verify that a new design produces the desired uniform spacing of events. Furthermore, I design, fabricate, and test a self-timed ring that is capable of exhibiting uniformly spaced behaviour. The key to my method is the development of an appropriate model of the timing behaviour of the self-timed circuit. This model is more accurate than the simplistic interval bounds of timed-automata techniques, while providing a higher level of abstraction than non-linear differential equation models such as SPICE. Uniformly spaced and clustered event behaviours are distinguished by simple geometric features of this model.
New Near-Infrared Surface Brightness Fluctuation Models
Creators: name: Mouhcine, M.
name: Gonzalez, R. A.
name: Liu, M. C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present new theoretical models for surface brightness fluctuations in the near-infrared. We show the time evolution of near-infrared brightness fluctuation properties over large age and metallicity ranges, i.e., from 12 Myr to 16 Gyr, and from Z/Zsun=1/50 to Z/Zsun=2.5, for single age, single metallicity stellar populations. All the stellar models are followed from the zero age main sequence to the central carbon ignition for massive stars, or to the end of the thermally pulsing regime of the asymptotic giant branch phase for low and intermediate mass stars. The new models are compared with observed near-infrared fluctuation absolute magnitudes and colours for a sample of Magellanic Cloud star clusters and Fornax Cluster galaxies. For star clusters younger than ~3 Gyr, the predicted near-infrared fluctuation properties are in a satisfactory agreement with observed ones over a wide range of stellar population metallicities. However, for older star clusters, the agreement between the observed and predicted near-IR brightness fluctuations depends on how the surface brightness absolute magnitudes are estimated. The computed set of models are not able to match the observed near-IR fluctuation absolute magnitudes and colours simultaneously. We argue that the observed discrepancies between the predicted and observed properties of old MC superclusters are more likely due to observational reasons.
description: MNRAS, 2005, 362, 1208 (12 pages, 7 figures)
Marginal Fermi Liquid Theory in the Hubbard Model
Creators: name: Kakehashi, Y.
name: Fulde, P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We find Marginal Fermi Liquid (MFL) like behavior in the Hubbard model on a square lattice for a range of hole doping and on-site interaction parameter U. Thereby we use a self-consistent projection operator method. It enables us to compute the momentum and frequency dependence of the single-particle excitations with high resolution. The Fermi surface is found to be hole-like in the underdoped and electron-like in the overdoped regime. When a comparison is possible we find consistency with finite temperature quantum Monte Carlo results. We also find a discontinuous change with doping concentration from a MFL to Fermi liquid behavior resulting from a collapse of the lower Hubbard band. This renders Luttinger's theorem inapplicable in the underdoped regime.
description: 8 pages, 6 figures
Ultrafast viscosity measurement with ballistic optical tweezers
Creators: name: Madsen, Lars S.
name: Waleed, Muhammad
name: Casacio, Catxere A.
name: Stilgoe, Alexander B.
name: Taylor, Michael A.
name: Bowen, Warwick P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Viscosity is an important property of out-of-equilibrium systems such as active biological materials and driven non-Newtonian fluids, and for fields ranging from biomaterials to geology, energy technologies and medicine. However, noninvasive viscosity measurements typically require integration times of seconds. Here we demonstrate a four orders-of-magnitude improvement in speed, down to twenty microseconds, with uncertainty dominated by fundamental thermal noise for the first time. We achieve this using the instantaneous velocity of a trapped particle in an optical tweezer. To resolve the instantaneous velocity we develop a structured-light detection system that allows particle tracking with megahertz bandwidths. Our results translate viscosity from a static averaged property, to one that may be dynamically tracked on the timescales of active dynamics. This opens a pathway to new discoveries in out-of-equilibrium systems, from the fast dynamics of phase transitions, to energy dissipation in motor molecule stepping, to violations of fluctuation laws of equilibrium thermodynamics.
Intervju med Ressem, Ole
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1974
Subjects: Ressem, Ole

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Omhandler blant hans deltakelse i den spanske borgerkrigen, Ungdommens Spaniakomité, arrestasjoner under krigen.
Indian Farmers' Valuation of Crop Yield Distributions: Will poor farmers value 'pro-poor' seeds?
Creators: name: Lybbert, Travis J.
name: Lybbert, Travis J.
Publisher: name: Unknown
Year: 2005
Subjects: subject: Farm Management
subject: Poverty
subject: Risk
subject: Biotechnology
subject: Experimental Economics

description: Potential poverty traps among the rural poor suggest a need to reduce poor farmers' vulnerability by stabilizing crop yields and limiting yield losses. Advances in agricultural biotechnology enable breeders to address this need more directly than ever before with crops that reduce production risk by tolerating climate fluctuation or resisting biotic stresses. Will poor farmers who could benefit most from less vulnerability choose to purchase such risk-reducing seeds? I use data from a household survey and experiment involving farmers in India to infer their valuation of changes in the mean, variance, and skewness of yield distributions. I conclude that these farmers value increases in expected yield in the yield distribution but seem indifferent about changes in higher moments of the distribution. Farmer traits such as wealth and risk exposure affect farmers' valuation of changes in yield distributions only mildly.
A Farm-Level Evaluation of Conditions Under Which Farmers Will Supply Biomass Feedstocks for Energy Production
Creators: name: Larson, James A.
name: English, Burton C.
name: Hellwinckel, Chad M.
name: Torre Ugarte, Daniel De La
name: Walsh, Marie E.
name: Larson, James A.
name: English, Burton C.
name: Hellwinckel, Chad M.
name: Torre Ugarte, Daniel De La
name: Walsh, Marie E.
Publisher: name: Unknown
Year: 2005
Subjects: Resource /Energy Economics and Policy

description: This study evaluated the risk management potential of including biomass crops as a diversification strategy for a grain farm in northwest Tennessee. Results indicate that adding biomass crops to the farm enterprise mix could improve mean net revenues and reduced net revenue variability.
Environmental Innovation and Environmental Policy: An Empirical Test of Bi-Directional Effects
Creators: name: Innes, Robert
name: Carrion-Flores, Carmen E.
name: Innes, Robert
name: Carrion-Flores, Carmen E.
Publisher: name: Unknown
Year: 2005
Subjects: Environmental Economics and Policy

description: The purpose of this paper is to study the empirical strength of the bi-directional linkages between environmental standards and performance, on the one hand, and environmental innovation, on the other and, hence, the role of policy in spurring environmental R&D and, in turn, ultimate environmental performance. We study these links using an alternative measure of policy stringency, namely, pollutant emissions themselves. Specifically, we examine 107 manufacturing industries at the three-digit SIC code for the period 1989 - 2002. In view of the joint determination of research and pollution outcomes, we estimate a system of simultaneous equations, using appropriate instruments to identify each endogenous variable. Our empirical results reveal that there is a negative and significant relationship between emissions and environmental patents, in both directions. Thus, environmental R&D both spurs the tightening of government environmental standards and is spurred by the anticipation of such tightening, suggesting that U.S. environmental policy (at least in the context of the manufacturing industries that we study) has been responsive to innovation and effective in inducing innovation. Preliminary results also suggest that a linear feedback model is appropriate in order to capture the dynamic nature of the links between environmental policy and environmental innovation.