cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Do regional Trade and Specialization drive intra-regional Risk-Sharing?
title: MAGKS - Joint Discussion Paper Series in Economics
Creators: name: Pfeffer, Barbara
Publisher: name: Philipps-Universität Marburg
Year: 2008
Subjects: Economics
Wirtschaft
Specialization
Trade
Risk Sharing

description: The goal of the present paper is two-fold. First, I explore the impact
of di¤erent trade patterns on industrial specialisation and consequently
on business cycle co-movements between and within di¤erent regions. Es-
pecially, I emphasize industrial specialisation as a result of intra- or inter-
industry trade. Furthermore, I justify the predictions of di¤erent theo-
retical trade models on the basis of my results . Second, I analyse the
degree of risk-sharing between and within the regions in dependence of
the previous step. In particular, the purpose is to clarify direct and indi-
rect channels between trade, specialisation, business cycle co-movements
and risk sharing.
The expectations are that countries within a region with homogeneous
specialisations show intra-industry trade. Hence regional business-cycles
converge. Consequently, risk-sharing within these regions is not possible.
These countries tend to be more internationally …nancially integrated than
regionally. Inter-industry trade arises in countries within regions with
heterogeneous specialisation. As a result regional business-cycles diverge.
Now, countries can share risk within the region. Regional …nancial integra-
tion is stronger for these countries than international …nancial integration.
One further question is: do the same patterns create risk sharing also in
the means of consumption co-movements between or within a region?
Universal tunneling time for all fields
Creators: name: Nimtz, G.
name: Stahlhofen, A. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Tunneling is an important physical process. The observation that particles surmount a high mountain in spite of the fact that they don't have the necessary energy cannot be explained by classical physics. However, this so called tunneling became allowed by quantum mechanics. Experimental tunneling studies with different photonic barriers from microwave frequencies up to ultraviolet frequencies pointed towards a universal tunneling time (Haibel,Esposito). Experiments and calculations have shown that the tunneling time of opaque photonic barriers (optical mirrors, e.g.) equals approximately the reciprocal frequency of the corresponding electromagnetic wave. The tunneling process is described by virtual photons. Virtual particles like photons or electrons are not observable. However, from the theoretical point of view, they represent necessary intermediate states between observable real states. In the case of tunneling there is a virtual particle between the incident and the transmitted particle. Tunneling modes have a purely imaginary wave number. They represent solutions of the Schroedinger equation and of the classical Helmholtz equation. Recent experimental and theoretical data of electron and sound tunneling confirmed the conjecture that the tunneling process is characterized by a universal tunneling time independent of the kind of field. Tunneling proceeds at a time of the order of the reciprocal frequency of the wave.
description: 7 pages latex, 3 figures
A simulation analysis of alternative stabilization schemes for British Columbia beef producers
Creators: name: Tang, Yan Sing
Publisher: name: University of British Columbia
Year: 2010

description: British Columbia Beef Producers' Income Assurance Program (FIAP) was implemented in 1974 to try to alleviate the income instability problem facing B.C. beef producers. The objective of this study was to estimate the costs and effects of FIAP and alternative stabilization schemes in meeting some likely provincial government goals for the B.C. beef industry. Due to a lack of knowledge of policy makers' objectives, simulation was chosen because it is a relatively convenient research technique for studying a non-optimizing problem. Simulation can trace out the likely impacts of alternative schemes, without putting them into practice. A mathematical model was built to incorporate the major features of the B.C. beef industry, in accord with relevant theory, experience and industry knowledge. A set of production assumptions and alternative schemes designed to stabilize beef producer income were also incorporated into the model. Later the mathematical model was translated for use on the computer. The model was validated with historical production data over the period 1959-1978, to ensure that it was a valid representation of the real world system. The model was initially run without government intervention. Then it was run for each of the alternative income stabilization schemes to estimate the likely impacts of each scheme. The cost and effects for different schemes were also compared to show the relative effectiveness of each scheme. The impacts of different schemes were shown by a set of summary measures that were thought to be of most interest to policy makers. Net welfare changes were also estimated and included in the summary measures. The estimated results show that FIAP and the other stabilization schemes considered would be capable of achieving a goal of income instability, when compared to the "no scheme" situation. From the government point of view, the guaranteed price scheme was shown to be most effective in both raising beef producer gross revenue and reducing income variability. FIAP, as it existed in 1977, offered the greatest net producer receipts to B.C. beef producers.
Estimating the size of the solution space of metabolic networks
Creators: name: Braunstein, Alfredo
name: Mulet, Roberto
name: Pagnani, Andrea
Publisher: name: arXiv
Year: 2007
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Molecular Networks (q-bio.MN)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: In this work we propose a novel algorithmic strategy that allows for an efficient characterization of the whole set of stable fluxes compatible with the metabolic constraints. The algorithm, based on the well-known Bethe approximation, allows the computation in polynomial time of the volume of a non full-dimensional convex polytope in high dimensions. The result of our algorithm match closely the prediction of Monte Carlo based estimations of the flux distributions of the Red Blood Cell metabolic network but in incomparably shorter time. We also analyze the statistical properties of the average fluxes of the reactions in the E-Coli metabolic network and finally to test the effect of gene knock-outs on the size of the solution space of the E-Coli central metabolism.
description: 8 pages, 7 pdf figures
Zwei erzbischöfliche Gräber aus dem mittelalterlichen Bremer Dom mit arabischen Inschriften am Pontifikalornat
Creators: name: Päffgen, Bernd
Publisher: name: VML Verlag Marie Leidorf
Year: 2021
Subjects: subject: Bischofsgräber
subject: Bremen
subject: Domgrabung
subject: arabische Inschriften
subject: Pontifikalornat
subject: Seide
subject: 900

description: Bei den Ausgrabungen im Bremer Dom kamen wichtige Erkenntnisse zu den erzbischöflichen Gräbern des Mittelalters zu Tage. Regelhaft wurden die Erzbischöfe in kostbaren Seidengewändern bestattet. Die Gewänder von sechs der Bestatteten im Bremer Dom weisen arabische Inschriften auf. Der Beitrag beschäftigt sich mit zwei Gräbern, die bereits 1930/31 und 1943 vor dem Beginn der Domgrabung geöffnet wurden.
title: Market Access, Regional Price Level and Wage Disparities: The German Case
title: MAGKS - Joint Discussion Paper Series in Economics
Creators: name: Kosfeld, Reinhold
name: Eckey, Hans-Friedrich
Publisher: name: Philipps-Universität Marburg
Year: 2008
Subjects: regional price levels
wage disparities
Economics
Wirtschaft
market access
New Economic Geography

description: In this paper we use the NEG framework of the Helpman model to investigate the
spatial distribution of wages across German labour market regions under different
assumptions. As the assumptions of equal regional price level and equal real wages are
strongly rejected for the German economy, standard approaches may fail to reveal the role of
market access in explaining regional wage disparities. In part substantial changes occur when
market potential is measured with the aid of regional price levels. With the so-called price
index approach, the importance of market access in explaining regional wage differentials is
clearly revealed. When controlling for heterogeneity of labour force and spatial dependence,
the relationship still remains highly significant. From the price index approach, limited
demand linkages of reasonable reach are inferred.
Port-Hamiltonian Neural Networks for Learning Explicit Time-Dependent Dynamical Systems
Creators: name: Desai, Shaan
name: Mattheakis, Marios
name: Sondak, David
name: Protopapas, Pavlos
name: Roberts, Stephen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Chaotic Dynamics (nlin.CD)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Accurately learning the temporal behavior of dynamical systems requires models with well-chosen learning biases. Recent innovations embed the Hamiltonian and Lagrangian formalisms into neural networks and demonstrate a significant improvement over other approaches in predicting trajectories of physical systems. These methods generally tackle autonomous systems that depend implicitly on time or systems for which a control signal is known apriori. Despite this success, many real world dynamical systems are non-autonomous, driven by time-dependent forces and experience energy dissipation. In this study, we address the challenge of learning from such non-autonomous systems by embedding the port-Hamiltonian formalism into neural networks, a versatile framework that can capture energy dissipation and time-dependent control forces. We show that the proposed \emph{port-Hamiltonian neural network} can efficiently learn the dynamics of nonlinear physical systems of practical interest and accurately recover the underlying stationary Hamiltonian, time-dependent force, and dissipative coefficient. A promising outcome of our network is its ability to learn and predict chaotic systems such as the Duffing equation, for which the trajectories are typically hard to learn.
description: [under review]
Stress orientation evaluated from strain localisation analysis in Aigion fault
Creators: name: Sulem, Jean
Publisher: name: arXiv
Year: 2008
Subjects: subject: Classical Physics (physics.class-ph)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: Within the frame of the 'CRL' (Corinth Rift Laboratory project) (Cornet et al, 2004a) centered on the south western sector of the Gulf of Corinth (http://www.corinth-rift-lab.org), fault zone cores from the active Aigion fault have been collected continuously from depths between 708 m to 782 m. Inside this clayey core, a clear shearing surface with marked slip lines is visible on a plane that makes a 68 degree angle with respect to the core axis. This failure surface was not induced by the decompression process but is indeed a slip plane as clear striation is observed at the interface. On the basis of an elastoplastic constitutive model calibrated on triaxial tests on the clayey gouge, it is shown that shear band formation inside the clayey core is possible. The solution for the orientation of the shear band is compared to the orientation of an existing slip surface inside the clayey gouge and this result is used to deduce the orientation of the principal stresses. It is shown that as commonly observed in weak fault zones, the orientation of the principal stresses is locally almost parallel and perpendicular to the fault axis.
title: EMU-related News and Financial Markets in the Czech Republic, Hungary and Poland
title: MAGKS - Joint Discussion Paper Series in Economics
Creators: name: Büttner, David
name: Hayo, Bernd
Publisher: name: Philipps-Universität Marburg
Year: 2008
Subjects: Economics
Wirtschaft
Czech Republic
European Monetary Union
Hungary
Poland
Financial markets
political news, macroeconomic shocks

description: We analyse the impact of news on five financial markets in the Czech Republic, Hungary and
Poland using a newly constructed data set in a GARCH framework. Macroeconomic shocks
(on GDP, inflation rate, current account and trade balance) are constructed as deviations from
expected values. EMU-related political and fiscal news is captured as news dummies.
Macroeconomic shocks significantly affect short-term interest rates and, to a lesser extent,
other financial variables. Political and fiscal news has an impact on long-term bond yields and
exchange rates. News displayed prominently in our media sources has a greater impact on
financial markets than other news and, in addition, the sources of news themselves matter. We
also discover asymmetric effects of news within markets. Finally, using a pooled GARCH
model we find that macroeconomic shocks have the strongest impact on financial markets in
Hungary, while political news has the largest influence in both Hungary and Poland.
First principles study of magnetism in nanographenes
Creators: name: Jiang, De-en
name: Sumpter, Bobby G.
name: Dai, Sheng
Publisher: name: arXiv
Year: 2007
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Magnetism in nanographenes (also know as polycyclic aromatic hydrocarbons, or PAHs) are studied with first principles density functional calculations. We find that an antiferromagnetic (AFM) phase appears as the PAH reaches a certain size. This AFM phase in PAHs has the same origin as the one in infinitely long zigzag-edged graphene nanoribbons, namely, from the localized electronic state at the zigzag edge. The smallest PAH still having an AFM ground state is identified. With increased length of the zigzag edge, PAHs approach an infinitely long ribbon in terms of (1) the energetic ordering and difference among the AFM, ferromagnetic (FM), and nonmagnetic (NM) phases and (2) the average local magnetic moment at the zigzag edges. These PAHs serve as ideal targets for chemical synthesis of nanographenes that possess magnetic properties. Moreover, our calculations support the interpretation that experimentally observed magnetism in activated carbon fibers originates from the zigzag edges of the nanographenes.
description: 20 pages, 4 figures
Relikte mittelalterlicher Binnenkolonisation im Bremer Niedervieland
Creators: name: Böker, Stephanie
Publisher: name: VML Verlag Marie Leidorf
Year: 2021
Subjects: subject: Binnenkolonisation
subject: Landesausbau
subject: Wurtenforschung
subject: 900

description: Die mittelalterliche Binnenkolonisation hat mit holländischer Wasserbautechnik das Landschaftsbild des Bremer Umlands geprägt. In Bremen begann die Kolonisierung im frühen 12. Jh. in der Wümmeniederung. In der zweiten Hälfte des 12. Jh. wurde auch die linke Weserseite kolonisiert. Dabei entstand die Siedlung Stelle im Niedervieland mit ursprünglich 19 Wurten. Drei dieser Wurten wurden im Vorfeld von Bauarbeiten in mehreren Grabungskampagnen ausgegraben. Wurt 17, die „Hove Warf“, war vermutlich der Herrenhof von Stelle. Außer zahlreichen mittelalterlichen Funden wurden dort ein Ringgraben, ein hafenähnliches Becken sowie das Fundament eines turmähnlichen Gebäudes ausgegraben. Wurt 16 wies ein vergleichbares Fundspektrum auf. Auch hier waren Gräben vorhanden. In einem befand sich eine aufwändige Holzkonstruktion aus dem 14. Jh. Die Fundstellen 14 und 15, die sich als eine Wurt herausstellten, hatten ebenfalls vergleichbare Funde und Gräben, zudem ein hafenähnliches Becken wie auf Wurt 17. Im Gegensatz zu den anderen Wurten konnten hier ein Lehmfußboden und Pfostengruben als Gebäudereste aus dem 14. Jh. dokumentiert werden. Die Grabungsbefunde legen den Schluss nahe, dass die Wurten planvoll verlassen worden sind.
title: Activation of TWEAK/Fn14 signaling suppresses TRAFs/NF-κB pathway in the pathogenesis of cancer
Creators: name: Gupta, Gaurav
name: Kazmi, Imran
name: Al-Abbasi, Fahad A.
name: Singh, Yogendra
name: S, Roshan
name: Rani, Suneha
name: Mishra, Anurag
name: Prasher, Parteek
name: Jha, Niraj Kumar
name: Thangavelu, Lakshmi
name: Dureja, Harish
name: Singh, Sachin K.
name: Bhatt, Shvetank
name: Chellappan, Dinesh Kumar
name: Dua, Kamal
Publisher: name: IfADo - Leibniz Research Centre for Working Environment and Human Factors, Dortmund
Year: 2021
Subjects: TWEAK
TNF
Fn14
non–small cell lung

description: EXCLI Journal; 20:Doc232; ISSN 1611-2156
title: Optimal Sequential Investigation Rules in Competition Law
title: MAGKS - Joint Discussion Paper Series in Economics
Creators: name: Kerber, Wolfgang
name: Kretschmer, Jürgen-Peter
name: von Wangenheim, Georg
Publisher: name: Philipps-Universität Marburg
Year: 2008
Subjects: Law Enforcement
Economics
Wirtschaft
Decision-Making
Competition Law
Antitrust Law

description: Although both in US antitrust and European competition law there is a clear evolution
to a much broader application of "rule of reason" (instead of per-se rules), there is also an
increasing awareness of the problems of a case-by-case approach. The "error costs approach"
(minimizing the sum of welfare costs of decision errors and administrative costs) allows not only
to decide between these two extremes, but also to design optimally differentiated rules (with an
optimal depth of investigation) as intermediate solutions between simple per-se rules and a fullscale
rule of reason. In this paper we present a decision-theoretic model that can be used as an
instrument for deriving optimal rules for a sequential investigation process in competition law.
Such a sequential investigation can be interpreted as a step-by-step sorting process into ever
smaller subclasses of cases that help to discriminate better between pro- and anticompetitive
cases. We analyze both the problem of optimal stopping of the investigation and optimal
sequencing of the assessment criteria in an investigation. To illustrate, we show how a more
differentiated rule on resale price maintenance could be derived after the rejection of its per-se
prohibition by the US Supreme Court in the "Leegin" case 2007.
Manifestations of CP Violation in the MSSM Higgs Sector
Creators: name: Lee, Jae Sik
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We demonstrate how CP violation manifests itself in the Higgs sector of the minimal supersymmetric extension of the Standard Model (MSSM). Starting with a brief introduction to CP violation in the MSSM and its effects on the Higgs sector, we discuss some phenomenological aspects of the Higgs sector CP violation based on the two scenarios called CPX and Trimixing
description: Submitted for the SUSY08 proceedings, 6 pages, 9 figures, Fig.6 corrected
Upsilon measurement in STAR
Creators: name: Cosentino, Mauro R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We present preliminary results of Upsilon production in p+p collisions at sqrt(s)=200 GeV at central rapidity. This measurement was performed at the STAR experiment through the Upsilon->e^+e^- decay channel. In this manuscript we describe the experimental details, from the development of a specially designed trigger setup to the analysis methods used to discriminate electrons from hadrons. The production cross-section obtained B*{(dsigma/dy)|(y=0)}=91(28)(22) pb is compatible with our expectations based on pQCD calculations.
description: 6 pages, 3 figures, proceedings for Quark Matter 2006
Viel Butter bei wenig Fisch
Creators: name: Küchelmann, Hans Christian
Publisher: name: VML Verlag Marie Leidorf
Year: 2021
Subjects: subject: Archäozoologie
subject: Fische
subject: Mittelalter
subject: 570

description: Zwei kleine, aber vielfältige Fischknocheninventare aus der mittelalterlichen Bremer Altstadt werden vorgestellt und in ihrem archäozoologischen, historischen und biologischen Kontext bewertet. Die Knochen erlauben detaillierte Aussagen zum mittelalterlichen Fischhandel in Bremen und belegen einen Fernhandel mit Stockfisch und Salzhering vor der Existenz historischer Belege. Sie beinhalten weiterhin Informationen zur ehemaligen geographischen Verbreitung heute bedrohter Fischarten.
Rising Jet-Inflated Bubbles in Clusters of Galaxies
Creators: name: Sternberg, Assaf
name: Soker, Noam
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We conduct two-dimensional axisymmetric (referred to as 2.5D) hydrodynamical numerical simulations of bubble evolution in clusters of galaxies. We inflate bubbles using slow, massive jets with a wide opening angle, and follow their evolution as they rise through the intra-cluster medium (ICM). We find that these jet-inflated bubbles are quite stable, and can reach large distances in the cluster while still maintaining their basic structure. The stability of the jet-inflated bubble comes mainly from the dense shell that forms around it during it's inflation stage, and from the outward momentum of the bubble and the shell. On the contrary, bubbles that are inserted by hand onto the grid and not inflated by a jet, i.e., an artificial bubble, lack these stabilizing factors, therefore, they are rapidly destroyed. The stability of the jet-inflated bubble removes the demand for stabilizing magnetic fields in the bubble.
description: accepted to MNRAS
title: Voting for mobile citizens
title: MAGKS - Joint Discussion Paper Series in Economics
Creators: name: Wrede, Matthias
Publisher: name: Philipps-Universität Marburg
Year: 2008
Subjects: Voting
inter- and intraregional redistribution
discrimination
mobility
Economics
Wirtschaft

description: This paper analyzes inter- and intraregional redistribution in a centralized state using
the citizen-candidate model. It focuses on conflicting interests among regions and
among citizens of varying mobility. If discrimination with respect to place of residence
and degree of mobility is possible, diversity of interests is high. Under the plurality rule
and with sincere voting, the largest socioeconomic group of citizens supplies the winning
candidate and discriminates against all other groups. However, if discrimination
with respect to the degree of mobility is constrained, mobile citizens may gain power
and interregional redistribution is reduced.
title: Agglomeration, tax competition, and fiscal equalization
title: MAGKS - Joint Discussion Paper Series in Economics
Creators: name: Wrede, Matthias
Publisher: name: Philipps-Universität Marburg
Year: 2008
Subjects: Agglomeration
fiscal equalization
Economics
Wirtschaft
tax competition

description: This paper analyzes the impact of fiscal equalization on asymmetric tax competition
when positive agglomeration externalities are present. It shows that equalization
of standardized tax revenue improves the spatial allocation of capital provided that
agglomeration externalities are sufficiently strong.
BodyVis: Body Learning Through Wearable Sensing and Visualization
Creators: name: Norooz, Leyla
Publisher: name: Digital Repository at the University of Maryland
Year: 2014
Subjects: subject: Information science
subject: Body learning
subject: Children
subject: E-textiles
subject: Sensing and Visualization
subject: Tangible Computing
subject: Wearable Technology

description: Unlike external body parts, organs are invisible and untouchable, making it difficult for children to learn their size, position, and function. With the advent of low-cost sensing, ubiquitous computation, and emerging e-textiles, new teaching approaches are developing that link the physical and virtual worlds. In this thesis, I report on the design and evaluation of several wearable e-textile prototypes --called BodyVis--that combine embedded sensing and interactive visualization to reveal otherwise "invisible" parts and functions of the human body. Key findings from an open-ended cooperative inquiry design session with children were used as guidelines in developing the first prototype. Versions of the second prototype were developed before and after a second cooperative inquiry design session. The final prototype was then evaluated through three design evaluation sessions. Three examples of use demonstrate the potential of BodyVis to engage, excite, and pique children's curiosity in learning about the human body.
Co-resonant enhancement of spin-torque critical currents in spin-valves with synthetic-ferrimagnet free-layer
Creators: name: Smith, Neil
name: Maat, Stefan
name: Carey, Matthew J.
name: Childress, Jeffrey R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: It is experimentally shown that the critical current for onset of spin-torque instability in current-perpendicular-to-plane spin-valves can be strongly enhanced using "synthetic ferrimagnet" free-layers of form FM1/Ru/FM2 (FM=ferrromagnet). However, this enhancement occurs for only one polarity of bias current. A two-macrospin model is shown to reproduce the observations. The model suggests that this phenomenon is related to a polarity-dependent, spin-torque induced co-resonance between the two natural dynamic modes of the FM1/FM2 couple. The resonance condition facilitates energy transfer out of the spin-torque destabilized mode into the other stable mode whose effective damping is actually enhanced by spin-torques, thereby delaying the onset of instability of this coupled system to larger critical currents.
description: 10 pages (manuscript form), with 4 embedded figures. Submitted for publication. Version #2 contains one additional equation (Eq. 4)
Die Weser – ein bedeutender Kommunikationsweg der römischen Kaiserzeit im Spiegel aktueller Forschungen
Creators: name: Jöns, Hauke
Publisher: name: VML Verlag Marie Leidorf
Year: 2021
Subjects: subject: Kommunikations- und Transportsysteme
subject: Lande- und Marktplätze
subject: Nordwestdeutschland
subject: Römische Kaiserzeit
subject: 900

description: Bereits seit vielen Jahrzehnten erregen im Römischen Reich hergestellte Gegenstände, die verstärkt entlang der Uferzonen von Ems, Elbe und Weser gefunden wurden, die Aufmerksamkeit der Forschung. Sie zeigen deutlich, dass den Wasserwegen in den stark durch Moore und Niederungen geprägten Landschaften eine besondere Rolle als Kommunikations- und Transportrouten zukam. Wie aktuelle Forschungen zeigen, kam dabei der Mündung der Weser in die Nordsee sowie den Mündungen der Hunte und der Aller in die Weser besondere Bedeutung zu. Durch die Anwendung eines interdisziplinären, aus Geophysik, Geologie, Bodenkunde, Paläobotanik und Archäologie entlehnten Methodenkanons ist es seit 2010 vor allem für das Mündungsgebiet und den unteren Abschnitt der Weser gelungen, zahlreiche neue Erkenntnisse über die wirtschaftlichen Systeme und gesellschaftlichen Strukturen zu gewinnen, die sich entlang des Flusses während der römischen Kaiserzeit herausbilden konnten und die die Grundlage für die erkennbare überregionale Kommunikation bildeten.
An einem abgeschiedenen Ort?
Creators: name: Hesse, Stefan
Publisher: name: VML Verlag Marie Leidorf
Year: 2021
Subjects: subject: Elbe-Weser-Dreieck
subject: Herrenhaus
subject: Mittelalter
subject: Pfostenhäuser
subject: Ländliche Siedlung
subject: 80

description: In den Jahren 2015 bis 2020 konnte bei mehreren Grabungen der Großteil einer mittelalterlichen Siedlung bei Zeven, Ldkr. Rotenburg (Wümme), dokumentiert werden. Neben ebenerdigen Pfostenbauten wurden aufgestelzte Speicher, Grubenhäuser, Brunnen und andere Siedlungsgruben nachgewiesen. Die Funde und Befunde datieren von der Zeit um 800 bis in die zweite Hälfte des 13. Jhs. mit einem deutlichen Schwerpunkt im 11. und 12. Jh. Auffällig ist ein separat liegender Hof mit ungewöhnlich großem Haupthaus, der wohl durch einen sozial und/oder ökonomisch hervorgehobenen Personenkreis genutzt wurde. Der Abbruch bzw. die Verlagerung der Siedlung kann in den Zusammenhang mit der Verlegung des Stifts Heeslingen nach Zeven und der dortigen Gründung als Kloster im Jahre 1141 gestellt werden. Möglicherweise kann die ergrabene Ortschaft mit dem frühen Zeven gleichgesetzt werden, das sich später in die Nähe des Klosters verlagerte.
title: Does Membership in International Organizations Increase Governments’ Credibility? Testing the Effects of Delegating Powers
title: MAGKS - Joint Discussion Paper Series in Economics
Creators: name: Dreher, Axel
name: Voigt, Stefan
Publisher: name: Philipps-Universität Marburg
Year: 2008
Subjects: Dilemma of the Strong State, International Organizations,
Economics
Wirtschaft
Credibility
Delegation of Competence

description: This paper analyzes whether nation-state governments can increase their credibility by
becoming members of international organizations. Credibility is an important asset
because it determines the real interest rate and is expected to have an important impact
on investment and growth. It is hypothesized that the degree of delegation to
international organizations can improve the credibility of nation-state governments.
This hypothesis is tested by introducing three new indicators for international
delegation. On the basis of panel data for up to 136 countries and the time period from
1984 to 2004, membership in international organizations is significantly and robustly
linked with better credibility, here proxied for by country risk ratings. Two more results
stand out: the longer a country has had a high level of membership, the higher its
credibility, ceteris paribus; and: the credibility-enhancing effect is strongest in countries
whose domestic institutions are weak.
Transport properties of Lennard-Jones fluids: Freezing density scaling along isotherms
Creators: name: Khrapak, S. A.
name: Khrapak, A. G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chemical Physics (physics.chem-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: It is demonstrated that properly reduced transport coefficients (self-diffusion, shear viscosity, and thermal conductivity) of Lennard-Jones fluids along isotherms exhibit quasi-universal scaling on the density divided by its value at the freezing point. Moreover, this scaling is closely related to the density scaling of transport coefficients of hard-sphere fluids. The Stokes-Einstein relation without the hydrodynamic diameter is valid in the dense fluid regime. The lower density boundary of its validity can serve as a practical demarcation line between gas-like and liquid-like regimes.
description: 6 pages, 4 figures
The internal dynamics of the community museum
Creators: name: Vallance, Julie Anne
Publisher: name: University of British Columbia
Year: 2010

description: The following paper is an attempt to explore the internal dynamics of small community museums. This exploration takes the form of two case studies in which the various points of view of staff and volunteers are presented. The results point to the emergence of two distinct and generally conflicting orientations on the part of individuals in both museums. These orientations are identified respectively as service to the community, on one hand, and as a concern with standardization and control or professionalism, on the other. The second focus of the paper deals with some of the recent reports concerning evaluation of training programs as well as future directions for community museums, as perceived by organizations such as the British Columbia Museums Association, the Canadian Museums Association, and the National Museums of Canada. What emerges from the examination of this literature is the growing preoccupation on the part of these organizations with the creation of a museum profession. It becomes clear that those who espouse this notion of professionalism demonstrate the same preoccupation with control and standardization as do the "professionally-oriented" individuals in the two case studies presented. Finally, three alternative futures for community museums are presented. The first one envisions the complete professionalization of the small museum and the loss of its community service orientation. The second future shows the two orientations continuing in conflict, in some instances providing a creative dynamic. The third possible future is one in which all of the organizations and individuals involved recognize and take steps to preserve the unique nature of the community museum through astute training programs and support mechanisms, while allowing for the limited and appropriate use of professional methods and standards.
Cosmological effects of neutrino mixing
Creators: name: Blasone, M.
name: Capolupo, A.
name: Capozziello, S.
name: Vitiello, G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We report on the recent result that a contribution to the dark energy can be achieved by the vacuum condensate induced by neutrino mixing phenomenon.
description: 3 pages, Presented at 13th International Symposium on Particles, Strings and Cosmology, Pascos 07, 2-7 Jul 2007, Imperial College, London
Clustering of Lyman alpha emitters at z ~ 4.5
Creators: name: Kovač, Katarina
name: Somerville, Rachel S.
name: Rhoads, James E.
name: Malhotra, Sangeeta
name: Wang, JunXian
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the clustering properties of 151 Lyman alpha emitting galaxies at z ~ 4.5 selected from the Large Area Lyman Alpha (LALA) survey. Our catalog covers an area of 36' x 36' observed with five narrowband filters. We assume that the angular correlation function w(theta) is well represented by a power law A_w = Theta^(-beta) with slope beta = 0.8, and we find A_w = 6.73 +/- 1.80. We then calculate the correlation length r_0 of the real-space two-point correlation function xi(r) = (r/r_0)^(-1.8) from A_w through the Limber transformation, assuming a flat, Lambda-dominated universe. Neglecting contamination, we find r_0 = 3.20 +/- 0.42 Mpc/h. Taking into account a possible 28% contamination by randomly distributed sources, we find r_0 = 4.61 +/- 0.6 Mpc/h. We compare these results with the expectations for the clustering of dark matter halos at this redshift in a Cold Dark Matter model, and find that the measured clustering strength can be reproduced if these objects reside in halos with a minimum mass of 1-2 times 10^11 Solar masses/h. Our estimated correlation length implies a bias of b ~ 3.7, similar to that of Lyman-break galaxies (LBG) at z ~ 3.8-4.9. However, Lyman alpha emitters are a factor of ~ 2-16 rarer than LBGs with a similar bias value and implied host halo mass. Therefore, one plausible scenario seems to be that Lyman alpha emitters occupy host halos of roughly the same mass as LBGs, but shine with a relatively low duty cycle of 6-50%.
description: 23 pages in preprint format, 4 figures, ApJ accepted
Estimation of population-level summaries in general semiparametric repeated measures regression models
Creators: name: Maity, Arnab
name: Apanasovich, Tatiyana V.
name: Carroll, Raymond J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistics Theory (math.ST)
subject: Methodology (stat.ME)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 62G08, 62J02 (Primary) 62J12 (Secondary)

description: This paper considers a wide family of semiparametric repeated measures regression models, in which the main interest is on estimating population-level quantities such as mean, variance, probabilities etc. Examples of our framework include generalized linear models for clustered/longitudinal data, among many others. We derive plug-in kernel-based estimators of the population level quantities and derive their asymptotic distribution. An example involving estimation of the survival function of hemoglobin measures in the Kenya hemoglobin study data is presented to demonstrate our methodology.
description: Published in at http://dx.doi.org/10.1214/193940307000000095 the IMS Collections (http://www.imstat.org/publications/imscollections.htm) by the Institute of Mathematical Statistics (http://www.imstat.org)
title: Federalism and Decentralization – A Critical Survey of Frequently Used Indicators
title: MAGKS - Joint Discussion Paper Series in Economics
Creators: name: Blume, Lorenz
name: Voigt, Stefan
Publisher: name: Philipps-Universität Marburg
Year: 2008
Subjects: Fiscal federalism
Decentralization
Federalism
Economics
Wirtschaft

description: The economic effects of federalism are unclear: some papers find that
federalism has strong positive effects on a number of economically relevant
variables, others find negative effects. The results often crucially hinge
upon the proxies for federalism used. In this paper, we critically survey the
existing indicators for both federalism and fiscal decentralization. We
argue that federalism is a constitutional institution whereas
decentralization is (the outcome of) a policy choice and that the two ought
to be systematically distinguished because decentralization can also occur
in non-federally structured states. We further argue that institutional
details are very important with regard to federalism and that dummy
variables usually capture only very specific aspects of the institutional
details. We use factor analysis to test whether the latent variables behind
the observed indicators support these assumptions. It is shown that more
than two important factors result, implying that a more fine-grained
differentiation beyond the distinction between federalism and
decentralization might be in order. The correlations of the most important
proxies for various aspects of federalism and decentralization with a
number of (quasi-) exogenous variables as well as with institutional
variables are usually rather modest.
Toward a New Distance to the Active Galaxy NGC 4258: II. Centripetal Accelerations and Investigation of Spiral Structure
Creators: name: Humphreys, E. M. L.
name: Reid, M. J.
name: Greenhill, L. J.
name: Moran, J. M.
name: Argon, A. L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report measurements of centripetal accelerations of maser spectral components of NGC 4258 for 51 epochs spanning 1994 to 2004. This is the second paper of a series, in which the goal is determination of a new geometric maser distance to NGC 4258 accurate to possibly ~3%. We measure accelerations using a formal analysis method that involves simultaneous decomposition of maser spectra for all epochs into multiple, Gaussian components. Components are coupled between epochs by linear drifts (accelerations) from their centroid velocities at a reference epoch. For high-velocity emission, accelerations lie in the range -0.7 to +0.7 km/s/yr indicating an origin within 13 degrees of the disk midline (the perpendicular to the line-of-sight to the black hole). Comparison of high-velocity emission projected positions in VLBI images, with those derived from acceleration data, provides evidence that masers trace real gas dynamics. High-velocity emission accelerations do not support a model of trailing shocks associated with spiral arms in the disk. However, we find strengthened evidence for spatial periodicity in high-velocity emission, of wavelength 0.75 mas. This supports suggestions of spiral structure due to density waves in the nuclear accretion disk of an active galaxy. Accelerations of low-velocity (systemic) emission lie in the range 7.7 to 8.9 km/s/yr, consistent with emission originating from a concavity where the thin, warped disk is tangent to the line-of-sight. A trend in accelerations of low-velocity emission as a function of Doppler velocity may be associated with disk geometry and orientation, or with the presence of spiral structure.
description: Accepted to ApJ, 48 pages and 20 figures
title: Values and Norms Matter – On the Basic Determinants of Long-Run Economic Development
title: MAGKS - Joint Discussion Paper Series in Economics
Creators: name: Voigt, Stefan
name: Park, Sang-Min
Publisher: name: Philipps-Universität Marburg
Year: 2008
Subjects: Social Capital, Civil Society
Economic Development
Total Factor Productivity
Rule of Law
Institutions
Culture
Values and Norms
Economics
Wirtschaft
Democracy

description: Over the last couple of decades, it has become a commonplace to claim that “institutions
matter” for economic development. Yet, institutions are not exogenous but the result of human
action. It is argued here that the values and norms held by substantial parts of society’s
members are an important determinant of its institutions. It is further argued that values and
norms have both a direct and an indirect effect on economic development: the direct effect
materializes because the values and norms also contain the work ethic which, if transformed
into behavior, should have direct consequences on economic development. The indirect effect
is conjectured to work via the relevant institutions: if institutions are important for economic
development and institutions are influenced by the values and norms, then this is a more indirect
channel through which values and norms can display their impact.
Supp. Material 1. Quaternary anomalous sea level highstands as a consequence of the lunar orbital inclination? A substantial discussion for a new hypothesis.
Creators: name: Lomoschitz, Alejandro
name: Meco, Joaquín
Publisher: name: figshare
Year: 2021
Subjects: subject: Paleoclimatology
subject: 40503 Physical Oceanography
subject: FOS: Earth and related environmental sciences
subject: 40313 Tectonics

description: According to a recent model (Cuk et al., 2016), the moon was formed from a giant impact with a proto earth and since then the inclination of the moon with respect to the ecliptic has had increasingly damped oscillatory movements (see Hamilton’s drawing in New Model Explains the Moon’s Weird Orbit, College of Computer, Mathematical, and Natural Sciences. University of Maryland: https://cmns.umd.edu/news-events/features/3680). In this case we hypothesized if with each of these oscillations there had been a displacement of the attraction of the moon on the earth that was accompanied by large oceanic water volume displacements from subtropical zones towards the tropics, producing latitudinal elevations of the sea level.
Transverse coincidence-structures in spontaneous parametric down-conversion with orbital angular momentum: Theory
Creators: name: Barbosa, Geraldo A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Coincidence-structures in the transverse plane of Type-II spontaneous parametric down-conversion carrying orbital angular momentum are obtained. Azimuthal symmetry breaking around the pump beam direction reveals itself on these quantum images. Analytical expressions for the amplitude probability of the down conversion process are shown including the nonlinear polarizability components.
description: 14 pages, 5 figures
Entanglement witnesses from mutually unbiased measurements
Creators: name: Siudzińska, Katarzyna
name: Chruściński, Dariusz
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A new family of positive, trace-preserving maps is introduced. It is defined using the mutually unbiased measurements, which generalize the notion of mutual unbiasedness of orthonormal bases. This family allows one to define entanglement witnesses whose indecomposability depends on the characteristics of the associated measurement operators.
title: Does the Currency Board Matter? U.S. News and Argentine Financial Market Reaction
title: MAGKS - Joint Discussion Paper Series in Economics
Creators: name: Hayo, Bernd
name: Neuenkirch, Matthias
Publisher: name: Philipps-Universität Marburg
Year: 2008
Subjects: Federal Reserve, Macroeconomic Announcements
Argentina
Economics
Wirtschaft
Financial Markets
Central Bank Communication

description: Using a GARCH model, we study the effects of U.S. monetary policy and macroeconomic
announcements on Argentine money, stock, and foreign exchange markets over the period
January 1998 to July 2007. We show, first, that both types of news have a significant impact
on all markets. Second, there are noticeable differences in reaction for different subsamples:
Argentine money markets were more dependent on U.S. news under the currency board than
after it was abandoned as the floating exchange rate partly absorbs spillover effects from the
United States. Finally, we find that U.S.-dollar-denominated assets react less to U.S. news
than peso-denominated assets, which suggests that the currency board was not completely
credible during its final years.
Quaternary anomalous sea level highstands as a consequence of the lunar orbital inclination? A substantial discussion for a new hypothesistitled Item.
Creators: name: Lomoschitz, Alejandro
name: Meco, Joaquín
Publisher: name: figshare
Year: 2021
Subjects: subject: Paleoclimatology
subject: 40503 Physical Oceanography
subject: FOS: Earth and related environmental sciences
subject: 40313 Tectonics

description: According to a recent model (Cuk et al., 2016), the moon was formed from a giant impact with a proto earth and since then the inclination of the moon with respect to the ecliptic has had increasingly damped oscillatory movements (see Hamilton’s drawing in New Model Explains the Moon’s Weird Orbit, College of Computer, Mathematical, and Natural Sciences. University of Maryland: https://cmns.umd.edu/news-events/features/3680). In this case we hypothesized if with each of these oscillations there had been a displacement of the attraction of the moon on the earth that was accompanied by large oceanic water volume displacements from subtropical zones towards the tropics, producing latitudinal elevations of the sea level.
Semiclassical bifurcations and quantum trajectories: a case study of the open Bose-Hubbard dimer
Creators: name: Giraldo, Andrus
name: Masson, Stuart J.
name: Broderick, Neil G. R.
name: Krauskopf, Bernd
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider the open two-site Bose-Hubbard dimer, a well-known quantum mechanical model that has been realised recently for photons in two coupled photonic crystal nanocavities. The system is described by a Lindblad master equation which, for large numbers of photons, gives rise to a limiting semiclassical model in the form of a four-dimensional vector field. From the situation where both sites trap the same amount of photons under symmetric pumping, one encounters a transition that involves symmetry breaking, the creation of periodic oscillations and multistability as the pump strength is increased. We show that the associated one-parameter bifurcation diagram of the semiclassical model captures the essence of statistical properties of computed quantum trajectories as the pump strength is increased. Even for small numbers of photons, the fingerprint of the semiclassical bifurcations can be recognised reliably in observables of quantum trajectories.
description: 19 pages, 10 figures