cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Colin, Gérard (Hrsg.): La version éthiopienne de l'histoire de Bsoy
Creators: name: Kropp, Manfred
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 90 (2006): Oriens christianus, Band 90
Der Hortfund von Crévic, ein urnenfelderzeitliches Handwerkerdepot aus Lothringen
Creators: name: Hänsel, Alix
Publisher: name: Acta Praehistorica et Archaeologica
Year: 2024

description: Acta Praehistorica et Archaeologica, Bd. 22 1990(1991)
Labeled binary planar trees and quasi-Lie algebras
Creators: name: Levine, Jerome
Publisher: name: arXiv
Year: 2005
Subjects: subject: Geometric Topology (math.GT)
subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 57N10, 57M25

description: We study the natural map eta between a group of binary planar trees whose leaves are labeled by elements of a free abelian group H and a certain group D(H) derived from the free Lie algebra over H. Both of these groups arise in several different topological contexts. The map eta is known to be an isomorphism over Q, but not over Z. We determine its cokernel and attack the conjecture that it is injective.
description: This is the version published by Algebraic & Geometric Topology on 9 August 2006
Multiple spatial and wavelength conversion operations based on a frequency-degenerated intermodal four-wave-mixing process in a graded-index 6-LP few mode fiber
Creators: name: Zhang, H.
name: Bigot-Astruc, M.
name: Sillard, P.
name: Millot, G.
name: Kibler, B.
name: Fatome, Julien
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We report on the experimental observation of a simultaneous threefold wavelength and spatial conversion process at telecommunication wavelengths taking place in a 6-LP-mode graded-index few-mode fiber. The physical mechanism is based on parallel and phase-matched frequency-degenerated intermodal four-wave mixing (FD-IFWM) phenomena occurring between the fundamental mode and higher-order spatial modes. More precisely, a single high-power frequency-degenerated pump wave is simultaneously injected in the four spatial modes LP01, LP11, LP02 and LP31 of a 1.8-km long graded-index few-mode fiber together with three independent signals in the fundamental mode. By means of three parallel phase-matched FD-IFWM interactions, these initial signals are then simultaneously spatially and frequency converted from the fundamental mode to specific high-order modes. The influence of the differential modal group delay is also investigated and shows that the walk-off between the spatially multiplexed signals significantly limits the bandwidth of the conversion process for telecom applications.
Supporting Information from Hurricane-induced demographic changes in a non-human primate population
Creators: name: Morcillo, Dana O.
name: Steiner, Ulrich K.
name: Grayson, Kristine L.
name: Ruiz-Lambides, Angelina V.
name: Hernández-Pacheco, Raisa
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Ecology

description: Exploration of stable stage theories and generalized additive mixed models for Cayo Santiago rhesus macaques
An investigation of air cargo operations at the Vancouver International Airport
Creators: name: Ladak, Omar-Hafaez
Publisher: name: University of British Columbia
Year: 2009

description: Described in this thesis is a summary of the methodology and results of a project conducted in the area of air cargo operations at the Vancouver International Airport (YVR). The objective of this project was to assist the Vancouver Airport Authority in understanding the operational requirements of air cargo transportation—an understanding required to achieve their strategic goals with respect to cargo transportation at YVR. The first phase of the project involved developing end-to-end process maps of all key cargo processes. This was done through interviews and site visits with cargo agents servicing YVR. Through information gathered in the process mapping phase and brainstorming sessions with Airport Authority management, key cargo resources were identified for detailed investigation. The resources chosen were the network of flights servicing YVR and dedicated airside storage space for transhipment cargo. The final phases of the project involved the detailed analyses of these resources. The YVR Flight Network Cargo Capacity Analysis quantifies the useful cargo carrying capacity of the YVR flight network for the year 2000 at 550,000 tonnes. This analysis is used to improve the understanding of how additional flight services increase the ability for YVR to transport cargo. This information can assist the Airport Authority in evaluating what changes in the flight network would be required to reach the strategic goal of doubling YVR air cargo transportation by 2010. The purpose of the Transhipment Cargo Facility Analysis was to give recommendation to the Airport Authority with respect to the necessity and potential value of developing an airside transhipment cargo facility at YVR. Information was synthesized from surveys sent to cargo agents servicing YVR, survey follow-up interviews, airside operations observations, and sample data collected describing the arrival and dwell time of transhipment cargo at YVR. The analysis presented concludes that a transhipment cargo staging would be beneficial to cargo agents at YVR. The benefit of reduced damage and spoilage of cargo is offset by the opportunity cost of the space.
The Role of Nutrition and Management Practices in Improving Fertility in Poultry
Creators: name: Renuka Hada1* and Rohit Sharma2
Publisher: name: The Science world a Monthly e magazine
Year: 2024

description: Maximizing the broiler's immense development potential in order to produce birds with high body weights and abundant breast meat is the primary objective of broiler production. However, fertility is inversely associated with each of these goals. The performance of broiler breeders presents a significant challenge to geneticists because broiler breeder selection requires maintaining a delicate balance between optimising growth and preserving competitive level of reproduction. Male aggression and its detrimental effects on mating behaviour and fertility have been under considerable scrutiny since the development of strains with high breast output. The ability of males to reproduce varies. Some roosters in a flock are exceptionally fertile and produce sperm of the finest quests, whereas other roosters are sub-fertile. A rooster's quality might vary depending on management, the environment, nutrition, and genetics. It is commonly accepted that fertilisation will take place if the hen is able to lay eggs and the sperm is viable. Semen deficiency in the oviduct, typically as a result of issues with mating frequency or mating success, may be the cause of infertility. Numerous elements, including genetics, nutrition, environment, and behaviour have an impact on this. It is widely acknowledged that foods, such as protein and energy components, that affect general body size and body composition might affect female fertility. According to research, reducing the amount of crude protein in the diet from 16% to 14%, 12%, or 10%, respectively, significantly increases fertility from 91.6% to 95.4%. Additionally, for optimal semen generation in male diets, the crude protein ratio might be as low as 9-10%. Low protein diets, however, can increase fertility by up to 2-3 percent. Additionally, vitamins and trace minerals, especially vitamin E, carotenoids, and selenium, which function as natural antioxidants and protect the sperm and embryo, can have a significant impact on fertility and hatchability.
CITRUS EXPORT MARKET DEVELOPMENT AND MAINTENANCE
Creators: name: Fairchild, Gary F.
name: Lee, Jonq-Ying
name: Fairchild, Gary F.
name: Lee, Jonq-Ying
Publisher: name: Unknown
Year: 1990
Subjects: International Relations/Trade

description: The marketing of agricultural commodities and food products has assumed an international dimension over the past two decades. Increased funding of export development programs by the federal government and commodity organizations suggest the need for improved understanding of U.S. export development programs and of the issues associated with export market development and maintenance. The lesson to be learned from the citrus industry experience is that unless the commodity or food product being promoted can be differentiated from other competitive products, or unless the product is priced lower than competitive products, or unless the product is priced lower than competitive products, the long-run effectiveness of export promotion programs will be limited.
What is the temperature of a granular medium?
Creators: name: Baldassarri, A.
name: Barrat, A.
name: D'Anna, G.
name: Loreto, V.
name: Mayor, P.
name: Puglisi, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In this paper we discuss whether thermodynamical concepts and in particular the notion of temperature could be relevant for the dynamics of granular systems. We briefly review how a temperature-like quantity can be defined and measured in granular media in very different regimes, namely the glassy-like, the liquid-like and the granular gas. The common denominator will be given by the Fluctuation-Dissipation Theorem, whose validity is explored by means of both numerical and experimental techniques. It turns out that, although a definition of a temperature is possible in all cases, its interpretation is far from being obvious. We discuss the possible perspectives both from the theoretical and, more importantly, from the experimental point of view.
A Primer for Manifestly Gauge Invariant Computations in SU(N) Yang-Mills
Creators: name: Rosten, Oliver J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It has recently been determined that, within the framework of the Exact Renormalisation Group, continuum computations can be performed to any loop order in SU(N) Yang-Mills theory without fixing the gauge or specifying the details of the regularisation scheme. In this paper, we summarise and refine the powerful diagrammatic techniques which facilitate this procedure and illustrate their application in the context of a calculation of the two-loop beta function.
description: 33 pages, 34 figures; v2: published in jphysa, intro extended, refs added, minor refinements, formatting changed
Functional Measures of Dexterous Fingertip Prosthesis
Creators: name: Martinez-Luna, Carlos
name: Farrell, Todd
name: Roberts, Todd
name: King, Carlton
name: Hunt, Thane
name: Rozell, Brianna
name: Liberating Technologies, Inc.
Publisher: name: figshare
Year: 2020
Subjects: subject: 90305 Rehabilitation Engineering
subject: FOS: Medical engineering
subject: 90304 Medical Devices
subject: 90399 Biomedical Engineering not elsewhere classified

description: Pointdexter, a dexterous fingertip terminal device, was designed to optimally combine the functions of prosthetic hands and hooks in a single upper-limb terminal device. Pointdexter adds an additional, selectable, dexterous grasp option focused on manipulating small objects. The current design is a two-tonged add-on to existing multi-articulating hands. The pointer finger on the hand is replaced with dexterous tonged end-effector in the fingertip and is driven with standard control signals.
Abstract for Functional Measures of Dexterous Fingertip Prosthesis. Submitted to and accepted for the 17th (2019) International Society for Prosthetics and Orthotics (ISPO) World Congress.
Test of multiscaling in DLA model using an off-lattice killing-free algorithm
Creators: name: Menshutin, Anton Yu.
name: Shchur, Lev N.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We test the multiscaling issue of DLA clusters using a modified algorithm. This algorithm eliminates killing the particles at the death circle. Instead, we return them to the birth circle at a random relative angle taken from the evaluated distribution. In addition, we use a two-level hierarchical memory model that allows using large steps in conjunction with an off-lattice realization of the model. Our algorithm still seems to stay in the framework of the original DLA model. We present an accurate estimate of the fractal dimensions based on the data for a hundred clusters with 50 million particles each. We find that multiscaling cannot be ruled out. We also find that the fractal dimension is a weak self-averaging quantity. In addition, the fractal dimension, if calculated using the harmonic measure, is a nonmonotonic function of the cluster radius. We argue that the controversies in the data interpretation can be due to the weak self-averaging and the influence of intrinsic noise.
description: 8 pages, 9 figures
AN AGENDA FOR THE DESIGN AND STUDY OF INTERNATIONAL ENVIRONMENTAL AGREEMENTS
Creators: name: Batabyal, Amitrajeet A.
name: Batabyal, Amitrajeet A.
Publisher: name: Unknown
Year: 1996
Subjects: subject: Environmental Economics and Policy
subject: International Relations/Trade
subject: international
subject: environmental
subject: agreement
subject: design
subject: game

description: The combination of a general greening of international political debate, and the events of 1992 at the Rio Earth summit have led to great interest in the question of global environmental protection. While it is recognized that international environmental agreements (IEAs) are the means by which the earth's fragile environment is most likely to be protected, this recognition has been recent. Hence, there is very little formal research on the design and study of IEAs. As such, in this paper, I propose and describe a research agenda for the design and study of IEAs. Very generally, I propose that we frame the IEA design question as a problem in mechanism design. We will then be able to use, inter alia, the theory of common agency and the theory of hierarchies to generate interesting new theoretical and practical insights into the workings of IEAs. Note: Forthcoming in Ecological Economics
Transient pattern formation in a stochastic model of cancer growth
Creators: name: Ochab-Marcinek, Anna
Publisher: name: arXiv
Year: 2005
Subjects: subject: Cell Behavior (q-bio.CB)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: We study a spatially inhomogeneous model of cancer growth based on Michaelis--Menten kinetics, subjected to additive Gaussian noise and multiplicative dichotomous noise. In presence of the latter, we can observe a transition between two stationary states of the system. The transient behaviour generates a spatial pattern of two phases, where cancer cells or immune cells predominate.
description: 9 pages, 2 figures
A RENEWAL THEORETIC APPROACH TO ENVIRONMENTAL STANDARD SETTING
Creators: name: Batabyal, Amitrajeet A.
name: Batabyal, Amitrajeet A.
Publisher: name: Unknown
Year: 1995
Subjects: subject: Environmental Economics and Policy
subject: environmental
subject: regulation
subject: standard
subject: renewal
subject: theory

description: The process of environmental regulation is usually a two-step one. In the first step, a standard for environmental quality is set. Then, in the second step, a regulatory mechanism is put in place to achieve the standard. In this paper I show how renewal theory can be used to set the quality standard optimally.
Bound-state eigenenergy outside and inside the continuum for unstable multilevel systems
Creators: name: Miyamoto, Manabu
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The eigenvalue problem for the dressed bound-state of unstable multilevel systems is examined both outside and inside the continuum, based on the N-level Friedrichs model which describes the couplings between the discrete levels and the continuous spectrum. It is shown that a bound-state eigenenergy always exists below each of the discrete levels that lie outside the continuum. Furthermore, by strengthening the couplings gradually, the eigenenergy corresponding to each of the discrete levels inside the continuum finally emerges. On the other hand, the absence of the eigenenergy inside the continuum is proved in weak but finite coupling regimes, provided that each of the form factors that determine the transition between some definite level and the continuum does not vanish at that energy level. An application to the spontaneous emission process for the hydrogen atom interacting with the electromagnetic field is demonstrated.
description: 10 pages, 4 figures, accepted for publication in Physical Review A
Why do we live in 3+1 dimensions?
Creators: name: Durrer, Ruth
name: Kunz, Martin
name: Sakellariadou, Mairi
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the context of string theory we argue that higher dimensional Dp-branes unwind and evaporate so that we are left with D3-branes embedded in a (9+1)-dimensional bulk. One of these D3-branes plays the role of our Universe. Within this picture, the evaporation of the higher dimensional Dp-branes provides the entropy of our Universe.
description: 9 pages, 4 figures. Citations added, text and figures updated to match version accepted for publication
Possible Origin of Clusters in Ultra-High-Energy Cosmic rays
Creators: name: Uryson, A. V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We estimate the detection rate of ultrahigh-energy cosmic rays on ground based arrays by assuming that the cosmic ray sources are active galactic nuclei. We analyse the cases of detection of clusters, several particles that arrived, within the error limits, from the same area of the sky. The adopted model is shown to explain the detection rate of clusters on the AGASA array.
description: 6 pages; to be published in Astronomy Letters, v.31, 2005
THE IMPACT OF INFORMATION ON LAND DEVELOPMENT: A DYNAMIC AND STOCHASTIC ANALYSIS
Creators: name: Batabyal, Amitrajeet A.
name: Batabyal, Amitrajeet A.
Publisher: name: Unknown
Year: 1995
Subjects: subject: Land Economics/Use
subject: development
subject: dynamic
subject: information
subject: uncertainty

description: In a two-period model, economists such as K.J. Arrow, A.C. Fisher, and C. Henry, have shown that when development is both indivisible and irreversible, a developer who ignores the possibility of obtaining new information about the outcome of such development will invariably underestimate the benefits of preservation and hence favor development. In this note, I extend the AFH analysis in two directions. I model the land development problem in a dynamic framework, explicitly specifying an information production function. In such a setting, I then ask and answer the question concerning when development should take place. Forthcoming in Journal of Environmental Management
What binary systems are the most likely sources for periodically repeating FRBs?
Creators: name: Zhang, Xianfei
name: Gao, He
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The newly discovered 16.35 days period for repeating FRB 180916.J0158+65 provides an essential clue for understanding the sources and emission mechanism of repeating FRBs. Many models propose that the periodically repeating FRBs might be related to binary star systems that contain at least one neutron star (NSC-FRB system). It has been suggested that the NS "combed" by the strong wind from a companion star might provide a solution. Following the "Binary Comb" model, we use the population synthesis method to study in detail the properties of the companion stars and the nature of NSC-FRB systems. Our main findings are: 1) the companion star is most likely to be a B-type star; 2) the period of 16 days of FRB 180916 happens to fall in the most probable period range, which may explain why FRB 180916 was the first detected periodically repeating FRB, and we expect to observe more periodically repeating FRBs with periods around 10-30 days; 3) the birth rate for NSC-FRB system is large enough to fulfill the event rate requirement set by the observation of FRB 180916, which supports the proposal that NSC-FRB can provide one significant channel for producing periodically repeating FRBs.
description: 8 pages,3 figures, accepted by MNRAS letter
Towards a Holographic Dual of SQCD: Holographic Anomalies and Higher Derivative Gravity
Creators: name: Babington, James
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the holographic dual of SQCD in the conformal phase. It is based on a higher derivative gravity theory, which ensures the correct field theory anomalies. This is then related to a six dimensional gravity theory via S^1 compactification. Some speculations are then made about the correspondence, Seiberg duality, and the nature of confinement from a holographic perspective.
description: 21 pages, JHEP style, typos corrected, refs added, some text added
Du silex à la poudre ... 4000 ans d’armement en val de Saône
Creators: name: Hansen, Svend
Publisher: name: Acta Praehistorica et Archaeologica
Year: 2024

description: Rezension zu: Du silex à la poudre.. . 4000 ans d’armement en val de Saône. Exposition 1990-1991 Chalon-sur-Saône. Herausgegeben v. L. Bonnamour mit Beiträgen von A. Bailly, L. Bonnamour, O. Bouzy, L. Chabal, M. Feugère, J.-P. Guillaumet. Librairie Archèologique, Montagnac 1990, ed. Monique Mergol. 196 Seiten, 152 Abbildungen
description: Acta Praehistorica et Archaeologica, Bd. 23 1991(1992)
THE ECONOMIC IMPACT OF UINTAH COUNTY'S WESTERN PARK
Creators: name: Snyder, Donald L.
name: Snyder, Donald L.
Publisher: name: Unknown
Year: 1996
Subjects: Community/Rural/Urban Development

description: Uintah County is home to a multiactivity conference complex located in Vernal, Utah. The complex is almost in constant use and includes locally sponsored activities, as well as regional and national activities. An estimate of local and nonlocal users were identified from Mr. Derk Hatch, manager of Western Park. I assumed that "nonlocal" use originated outside the county. Taking into account the "local" and "nonlocal" mix, it is estimated that the center annually generates over $4.8 million dollars in economic activity, with approximately 60% a result of direct expenditures. The complex also results in additional employment opportunities for approximately 136 individuals, summarizing direct, indirect, and induced effects. The county's population change as a result of the center is just over 300 persons. These estimates assume that the county would be at or near full-employment in the absence of the Western Park complex.
Essays on product quality and strategic policies in open economies
Creators: name: Jinji, Naoto
Publisher: name: University of British Columbia
Year: 2009

description: This thesis consists of three essays which contribute to the theory of product quality and strategic policies in open economies. The first essay examines strategic R&D policy in a quality-differentiated duopolistic industry where domestic and foreign firms have access to the same technology. Under price competition the optimal policy is such that the domestic government taxes R&D if the domestic firm produces a higher quality product than its foreign rival and subsidizes R&D if the domestic firm produces a lower quality product. Under quantity competition, on the other hand, the optimal policy is such that the domestic government subsidizes R&D with different subsidy rates for different ranges of relative quality, where a higher subsidy should be implemented if the domestic firm produces a lower quality product. The second essay demonstrates that the domestic government may have incentives to use eco-labeling strategically when domestic and foreign firms compete in an imperfectly competitive domestic market, while eco-labeling is primarily aimed at improving environmental quality. When the domestic firm obtains an eco-label and the foreign firm does not, the domestic government may have incentives to set strategically a higher or lower standard for eco-label than a standard which would be non-strategically chosen, depending on the relative size of quality-adjusted unit variable costs. The strategic effects may have the same sign regardless of the form of competition. The third essay explores protectionist motives to impose mandatory labeling of biotechnology products when a foreign firm reduces unit production cost by using biotechnology and becomes the price leader in the market. Consumers may perceive biotechnology products as being of lower quality. Competitive firms that use conventional technology may have incentives to label their products voluntarily. When voluntary labeling is fully credible, the importing country may impose mandatory labeling mainly because part of labeling costs can be shifted to the foreign dominant firm under mandatory labeling. When voluntary labeling is not credible, on the other hand, the importing country uses mandatory labeling with other trade measures such as tariffs to shift profits from the foreign dominant firm to the domestic economy.
QUICKEN AS A FARM ACCOUNTING SYSTEM: A LESSON PLAN ON CASH BASIS RECORDKEEPING WITH ACCRUAL-ADJUSTED FINANCIAL STATEMENTS
Creators: name: Bond, Larry K.
name: Bond, Larry K.
Publisher: name: Unknown
Year: 1996
Subjects: Agricultural Finance

description: The purpose of this document is to demonstrate how Quicken, a popular checkbook management software program, can be used to keep a set of records for the farm business that will measure profits, liquidity, and solvency. This is a revision of ERI 95-02, with more detailed explanations. All graphics have been eliminated and fonts have been changed so this document can be printed on most printers. It is based on an example farm used in the Business Management in Agriculture (BMA) series of videos and workbooks developed in the late 1980s, and draws on materials prepared by Dr. Ken Stokes of Texas A&M University. It will best be understood if used as a study guide, and that entries actually be made in Quicken as they are encountered in the guide, and following the instructions given in Appendix A. By the time you complete this exercise, you will have a much better idea how to keep records on your farm, and how useful the reports will be in managing your farm or ranch operation. Appendix A contains instructions for those who received a disk with files already set up. If you did not receive a disk, consider yourself lucky. You will probably learn more just from having to go through the steps of setting up the accounts and categories. This is not intended to be an introductory course in either recordkeeping or Quicken. It requires some previous training in Quicken. Those with a basic understanding of accounting principles will find it easier to understand and will have less trouble making entries for their own business. Yet, almost anyone with a desire and diligence can master the concepts and implement the system for their business.
COMPLIANCE BIAS IN DICHOTOMOUS CHOICE CVM: SOME EVIDENCE FROM A UTAH WILDERNESS STUDY
Creators: name: Keith, John E.
name: Fawson, Christopher B.
name: Keith, John E.
name: Fawson, Christopher B.
Publisher: name: Unknown
Year: 1996
Subjects: Resource /Energy Economics and Policy

description: Responses to a dichotomous choice contingent valuation (DCCV) of wilderness designation in Utah were used to determine if individuals who identified themselves as having no opinion or being neutral to wilderness designation in general and for two specific wilderness proposals would have nonnegative willingness to pay for such designation. In cases for which a sufficient number of observations permitted estimation, the estimated willingness to pay was positive and significantly different from zero and often exceeded that of individuals who identified themselves as supporting wilderness designation. This appears to support the contention that DCCV studies may generate values from respondents whether or not those respondents truly have positive willingness to pay.
Conifold Cosmologies in IIA String Theory
Creators: name: Mohaupt, Thomas
name: Saueressig, Frank
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss the extension of our recent work hep-th/0410272, hep-th/0410273 to general conifold transitions and type-IIA string theory.
description: 8 pages, 4 figures, contributed to the proceedings of the 37-th International Symposium Ahrenshoop, Berlin, August 23-27, 2004
AN AGENDA FOR THE STUDY OF LAND USE, WILDERNESS DESIGNATION, AND RESOURCE REGULATION IN THE AMERICAN WEST
Creators: name: Batabyal, Amitrajeet A.
name: Batabyal, Amitrajeet A.
Publisher: name: Unknown
Year: 1995
Subjects: subject: Land Economics/Use
subject: Resource /Energy Economics and Policy
subject: land use
subject: wilderness
subject: regulation
subject: research
subject: agenda

description: Atemporal and intertemporal use of public lands, the determination of optimal levels of wilderness designation and habitat preservation, and the appropriate regulation of natural resources have all been "hot button" issues in the American West for quite some time now. In this paper, I propose and describe a research agenda which promises to yield interesting and useful new policy insights into these fractious resource issues.
Helga Polenz, Katalog der merowingerzeitlichen Funde der Pfalz
Creators: name: Neumayer, Heino
Publisher: name: Acta Praehistorica et Archaeologica
Year: 2024

description: Rezension zu: Helga Polenz, Katalog der merowingerzeitlichen Funde der Pfalz. Germ. Denkmäler der Völkerwanderungszeit Ser. B. 12, Franz Steiner Verlag, Wiesbaden 1988, 2 Bände, 476 Seiten, 24 Abbildungen, 7 Faltbeilagen, 270 Tafeln
description: Acta Praehistorica et Archaeologica, Bd. 23 1991(1992)
From finite geometry exact quantities to (elliptic) scattering amplitudes for spin chains: the 1/2-XYZ
Creators: name: Fioravanti, Davide
name: Rossi, Marco
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: Initially, we derive a nonlinear integral equation for the vacuum counting function of the spin 1/2-XYZ chain in the {\it disordered regime}, thus paralleling similar results by Klümper \cite{KLU}, achieved through a different technique in the {\it antiferroelectric regime}. In terms of the counting function we obtain the usual physical quantities, like the energy and the transfer matrix (eigenvalues). Then, we introduce a double scaling limit which appears to describe the sine-Gordon theory on cylindrical geometry, so generalising famous results in the plane by Luther \cite{LUT} and Johnson et al. \cite{JKM}. Furthermore, after extending the nonlinear integral equation to excitations, we derive scattering amplitudes involving solitons/antisolitons first, and bound states later. The latter case comes out as manifestly related to the Deformed Virasoro Algebra of Shiraishi et al. \cite{SKAO}. Although this nonlinear integral equations framework was contrived to deal with finite geometries, we prove it to be effective for discovering or rediscovering S-matrices. As a particular example, we prove that this unique model furnishes explicitly two S-matrices, proposed respectively by Zamolodchikov \cite{ZAMe} and Lukyanov-Mussardo-Penati \cite{LUK, MP} as plausible scattering description of unknown integrable field theories.
description: Article, 41 pages, Latex
Kurt Bittel, Siegwalt Schiek und Dieter Müller, Die keltischen Viereckschanzen
Creators: name: Reichenberger, Alfred
Publisher: name: Acta Praehistorica et Archaeologica
Year: 2024

description: Rezension zu: Kurt Bittel, Siegwalt Schiek und Dieter Müller, Die keltischen Viereckschanzen. Mit einem Beitrag von Günther Wieland. Atlas archaologischer Geländedenkmaler in Baden-Württemberg 1. Teil 1: Text; Teil 2: Beilagen. Konrad Theiss Verlag, Stuttgart 1990. 398 Seiten, 258 Textabbildungen, 82 Beilagen
description: Acta Praehistorica et Archaeologica, Bd. 23 1991(1992)
Spin-2 Amplitudes in Black-Hole Evaporation
Creators: name: Farley, A. N. St. J.
name: D'Eath, P. D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Quantum amplitudes for $s=2$ gravitational-wave perturbations of Einstein/scalar collapse to a black hole are treated by analogy with $s=1$ Maxwell perturbations. The spin-2 perturbations split into parts with odd and even parity. We use the Regge-Wheeler gauge; at a certain point we make a gauge transformation to an asymptotically-flat gauge, such that the metric perturbations have the expected falloff behaviour at large radii. By analogy with $s=1$, for $s=2$ natural 'coordinate' variables are given by the magnetic part $H_{ij} (i,j=1,2,3)$ of the Weyl tensor, which can be taken as boundary data on a final space-like hypersurface $Σ_F$. For simplicity, we take the data on the initial surface $Σ_I$ to be exactly spherically-symmetric. The (large) Lorentzian proper-time interval between $Σ_I$ and $Σ_F$, measured at spatial infinity, is denoted by $T$. We follow Feynman's $+iε$ prescription and rotate $T$ into the complex: $T\to{\mid}T{\mid} \exp(-iθ)$, for $0
A model of laminated wave turbulence
Creators: name: Kartashova, Elena
Publisher: name: arXiv
Year: 2005
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: A model of laminated wave turbulence is presented. This model consists of two co-existing layers - one with continuous waves' spectra, covered by KAM theory and Kolmogorov-like power spectra, and one with discrete waves' spectra, covered by discrete classes of waves and Clipping method. Some known laboratory experiments and numerical simulations are explained in the frame of this model.
description: 7 pages, to appear in Letters JETP, vol. 83 (7) (2006)
30 Jahre PEG-Naßholzkonservierung im Museum fur Vor- und Frühgeschichte
Creators: name: Born, Hermann
name: Zimmermann, Jörg
Publisher: name: Acta Praehistorica et Archaeologica
Year: 2024

description: Acta Praehistorica et Archaeologica, Bd. 23 1991(1992)
Molecular Gas in NUclei of GAlaxies (NUGA) III. The warped LINER NGC3718
Creators: name: Krips, M.
name: Eckart, A.
name: Neri, R.
name: Pott, J. U.
name: Leon, S.
name: Combes, F.
name: Garcia-Burillo, S.
name: Hunt, L. K.
name: Baker, A. J.
name: Tacconi, L. J.
name: Englmaier, P.
name: Schinnerer, E.
name: Boone, F.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the first interferometric observations of CO(1-0) and CO(2-1) line emission from the warped LINER NGC3718, obtained with the IRAM PdBI. This L1.9 galaxy has a prominent dust lane and on kpc scales, a strongly warped atomic and molecular gas disk. The molecular gas is closely associated with the dust lane across the nucleus and its kinematic center is consistent with the mm continuum AGN. A comparison of our interferometric mosaic data, which fully cover the ~9kpc warped disk, with a previously obtained IRAM 30m single dish CO(1-0) map shows that the molecular gas distribution in the disk is heavily resolved by the PdBI map. After applying a short-spacing correction with the IRAM 30m data, we find in total six main source components within the dust lane: one associated with the nucleus, four symmetrically positioned on either side at galactocentric distances of about 1.3kpc and 4.0kpc from the center, and a sixth on the western side at ~3kpc with only a very weak eastern counterpart. In the framework of a kinematic model using tilted rings, we interpret the five symmetric source components as locations of strong orbital crowding. We further find indications that the warp appears not only on kpc scales, but continues down to 250pc. Besides the sixth feature on the western side, the lower flux of the eastern components compared to the western ones indicates an intrinsic large scale asymmetry in NGC3718 that cannot be explained by the warp. Indications for a small scale asymmetry are also seen in the central 600pc. These asymmetries might be evidence for a tidal interaction with a companion galaxy (large scales) and gas accretion onto the nucleus (small scales). Our study of NGC3718 is part of the NUGA project that aims at investigating the different processes of gas accretion onto AGN.
description: 16 pages, 17 figures, accepted by A&A, high resolution version of the paper available at
Ungewöhnliche Klingenreparaturen an einem spätbronzezeitlichen Vollgriffschwert
Creators: name: Born, Hermann
name: Hansen, Svend
Publisher: name: Acta Praehistorica et Archaeologica
Year: 2024

description: Acta Praehistorica et Archaeologica, Bd. 23 1991(1992)
Designing a Skill Tests Battery for Midfield Football Players Under 17 Years Old
Creators: name: Aknouche, Mokhtar
name: Sellami, Abderrahim
name: Gasmi, Abdelmalek
Publisher: name: Zenodo
Year: 2024
Subjects: Factor Analysis; Test Battery; Skill; Football.

description: The study aims to design a skill tests battery for midfield football players under 17 years old for the first regional teams in Annaba, designed according to the principles and stages of test design. For this purpose, we used a descriptive survey methodology on a sample of 14 players from the midfield position, selected deliberately. To collect data, 30 standardized skill tests were employed. After collecting and statistically processing the results using factor analysis, six factors were extracted, representing four core skills (passing, dribbling, ball control, and scoring). Based on these findings, the study recommends the use of the derived test battery units in evaluating midfield football players
Observation of magnetoelectric behavior at room temperature in Pb(Fe1-xTix)O3
Creators: name: Palkar, V. R.
name: Malik, S. K.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The coexistence of ferroelectric and ferromagnetic properties at room temperature is very rarely observed. We have been successful in converting ferroelectric PbTiO3 into a magnetoelectric material by partly substituting Fe at the Ti site. The Pb(Fe1-xTix)O3 system exhibits ferroelectric and ferromagnetic ordering at room temperature. Even more remarkably, our results demonstrate a coupling between the two order parameters. Hence it could be a futuristic material to provide cost effective and simple path for designing novel electromagnetic devices.
description: Total 14 pages of text and figures
Quantum fluctuations of rotating strings in AdS_5 x S^5
Creators: name: Fuji, Hiroyuki
name: Satoh, Yuji
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss quantum fluctuations of a class of rotating strings in AdS_5 x S^5. In particular, we develop a systematic method to compute the one-loop sigma-model effective actions in closed forms as expansions for large spins. As examples, we explicitly evaluate the leading terms for the constant radii strings in the SO(6) sector with two equal spins, the SU(2) sector, and the SL(2) sector. We also obtain the leading quantum corrections to the space-time energy for these sectors.
description: 27 pages, no figures; (v2) references added; (v3) explanations added
Building capacity for environmental planning in Viet Nam : the role of development aid environmental impact assessment programmes
Creators: name: Doberstein, Brent A.
Publisher: name: University of British Columbia
Year: 2009

description: This dissertation examines contentions in academic literature that a planning model of EIA' is a promising means by which to support sustainable development in developing countries. The planning model structures EIA as a participatory and value-laden planning process, linked to political planning and decision-making processes, embracing uncertainty, and incorporating multiple ways of knowing about environmental/social impacts. This contrasts with the 'technical model of EIA': a rational/technical product, using scientific techniques and skilled technicians to predict and quantify environmental and social impacts. Research was carried out in Viet Nam, using a comparative case study approach. Development-aid EIA capacity-building programmes were used as case studies (n=9). Crosscase analysis was used to distill patterns, processes and outcomes common to the cases. The research employed a range of data gathering and analytical methods, including: collection of secondary sources, historical analysis, contents analysis, key informant interviewing (n=64) and direct observation. In only five years of effort, development aid programmes have helped to transform the role of EIA in Viet Nam. From a training and awareness raising tool, EIA has become an officially mandated process beginning to influence the design of new projects and the wider Vietnamese development planning process. However, these programmes have a confusingly high degree of variation in EIA models promoted, ranging from a 'strong technical model' to a 'moderate planning model'. The planning model of EIA was not a strong influence when Viet Nam first implemented its EIA process, nor has such a model been fully promoted by development aid capacitybuilding programmes. These programmes have had only limited success in promoting some elements of the planning model of EIA, including: EIA beyond project levels; longer-term EIA processes and impact monitoring, and; awareness of the need to broaden assessment beyond biophysical impacts. A number of areas of change are critical if aid agencies wish to promote a more complete planning model. The dissertation concludes with a call for development aid agencies to reposition EIA capacity-building programmes as a deliberate attempt to transform aspects of the development planning contexts of developing countries, rather than to merely strengthen EIA and planning capacities within an unsustainable development planning process.
Nonlinear dynamics in one dimension: On a criterion for coarsening and its temporal law
Creators: name: Politi, Paolo
name: Misbah, Chaouqi
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We develop a general criterion about coarsening for a class of nonlinear evolution equations describing one dimensional pattern-forming systems. This criterion allows one to discriminate between the situation where a coarsening process takes place and the one where the wavelength is fixed in the course of time. An intermediate scenario may occur, namely `interrupted coarsening'. The power of the criterion lies in the fact that the statement about the occurrence of coarsening, or selection of a length scale, can be made by only inspecting the behavior of the branch of steady state periodic solutions. The criterion states that coarsening occurs if lambda'(A)>0 while a length scale selection prevails if lambda'(A)<0, where $lambda$ is the wavelength of the pattern and A is the amplitude of the profile. This criterion is established thanks to the analysis of the phase diffusion equation of the pattern. We connect the phase diffusion coefficient D(lambda) (which carries a kinetic information) to lambda'(A), which refers to a pure steady state property. The relationship between kinetics and the behavior of the branch of steady state solutions is established fully analytically for several classes of equations. Another important and new result which emerges here is that the exploitation of the phase diffusion coefficient enables us to determine in a rather straightforward manner the dynamical coarsening exponent. Our calculation, based on the idea that |D(lambda)|=lambda^2/t, is exemplified on several nonlinear equations, showing that the exact exponent is captured. Some speculations about the extension of the present results to higher dimension are outlined.
description: 16 pages. Only a few minor changes. Accepted for publication in Physical Review E
Spin-$1\over 2$ amplitudes in black-hole evaporation
Creators: name: Farley, A. N. St. J.
name: D'Eath, P. D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We extend to the fermionic spin-1/2 case earlier work on quantum amplitudes arising from gravitational collapse to a black hole. Boundary data are specified on initial and final asymptotically-flat space-like hypersurfaces $Σ_{I,F}$, separated by a Lorentzian proper-time interval $T$, measured at spatial infinity. Following Feynman's $+iε$ prescription, one makes the problem well-posed by rotating $T$ into the complex: $T\to{\mid}T{\mid} \exp(-iθ)$, with $00$, one takes the 'Lorentzian limit' $θ\to 0_+$. In this paper, we treat quantum amplitudes for the case of fermionic massless spin-1/2 (neutrino) final boundary data; working in the holomorphic representation, we take these boundary data to be odd elements of a Grassmann algebra. Making use of boundary conditions originally developed for local supersymmetry, we find that this fermionic case can be treated in a way which parallels the bosonic case. With these boundary conditions, for $θ> 0$, one obtains a unique fermionic classical solution, and we calculate its classical action as a functional of the fermionic data on the late-time surface $Σ_F$; the quantum amplitude follows straightforwardly from this.
Validity of semiclassical gravity in the stochastic gravity approach
Creators: name: Verdaguer, E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In semiclassical gravity the back-reaction of the classical gravitational field interacting with quantum matter fields is described by the semiclassical Einstein equations. A criterion for the validity of semiclassical gravity based on the stability of the solutions of the semiclassical Einstein equations with respect to quantum metric perturbations is discussed. The two-point quantum correlation functions for the metric perturbations can be described by the Einstein-Langevin equation obtained in the framework of stochastic gravity. These correlation functions agree, to leading order in the large $N$ limit, with the quantum correlation functions of the theory of gravity interacting with $N$ matter fields. The Einstein-Langevin equations exhibit runaway solutions and methods to deal with these solutions are discussed. The validity criterion is used to show that flat spacetime as a solution of semiclassical gravity is stable and, consequently, a description based on semiclassical gravity is a valid approximation in that case.
description: Second Intenational Workshop DICE2004