cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Discrete holomorphicity in solvable lattice models
Creators: name: Alam, Imam Tashdid-Ul
Publisher: name: The Australian National University
Year: 2014

description: The critical phases of two dimensional lattice models are widely believed to be described by conformal quantum field theories in the scaling limit. In the past few years, formal proofs of the conformal invariance in different formulations of the Ising model have emerged which make pivotal use of some complex lattice observables. Due to their distinctive property of discrete holomorphicity, they are considered to be the lattice counterpart of holomorphic currents in the field theories. In this thesis, we study a weakened form of discrete holomorphicity that is known to be obeyed by natural generalizations of these observables to three important families of solvable models. The main result of this thesis is that discrete holomorphicity can be seen as a requirement stronger than the conditions of integrability of the models. That is, these conditions, the inversion relations and the Yang-Baxter equations, can be derived from this form of lattice holomorphicity. This finding is proposed as an explanation for the remarkable observation that discrete holomorphicity holds only on the integrable critical manifold of the weights. For the self-dual models, the duality conditions can also be established similarly. A key role in this argument is played by the rhombic embeddings of Baxter lattices. It is noted that, by the requirement of holomorphicity on every rhombus, the conformal spins of the observables are restricted to a discrete spectrum that label the solutions in which the angles of the rhombuses are interpreted as re-scaled spectral parameters. This interpretation allows the relationships between the spectral parameters in the integrability conditions to be seen as the criteria for geometric consistency of the rhombic embedding. The crossing symmetry of the models is then related to the alignment of the rhombuses with respect to the rapidity lines. It has also been shown here that values of the observables on the boundary of a simply connected domain remain unchanged by local rearrangement of rhombuses due to the Z-invariance of the models. This provides an independent characterization of the observables besides discrete holomorphicity and enables us to define them on the equivalence class of Baxter lattices with any given braiding of the rapidity lines. For an equivalence class, the holomorphicity equations then provide linear relations among its partition functions with different boundary conditions. The results of this thesis thus point to the essential, albeit somewhat obscure, role of integrability in the rigorous proofs.
Translating Service: An Ethnography of the Mennonite Central Committee
Creators: name: Fountain, Philip Michael
Publisher: name: Canberra, ACT : The Australian National University
Year: 2011
Subjects: Religion and development, Anthropology of development, Anthropology of Christianity, Mennonite Central Committee, Indonesia, Translation

description: This thesis examines the work of the Mennonite Central Committee (MCC) in Indonesia. In describing the inner workings of MCC it draws on a diverse range of historical and contemporary sources as well twenty-two months of ethnographic field research. The argument focuses on two themes. First, it explores the ways in which the practices of MCC are informed by the Anabaptist-Mennonite Christian religious tradition in North America. The influences of Mennonite vernacular theologies, identities and practices are far-reaching. Particularly important is the idea of service, which constitutes a distinctive Mennonite paradigm of development. Second, the thesis analyses processes of translation. MCC is an interstitial organisation located between different socio-cultural milieux. The factors propelling North American Mennonite donor participation in MCC must be translated into Indonesian contexts. Because translation involves both transference and transforma tion, MCC's work is dynamic and unpredictable. Therefore, while Mennonite religion is deeply influential, actual practice in Indonesia involves collaborations with a range of actors who come from different positions. In exploring the practices of translation in MCC the thesis pays attention to the place of individuals and relationships. In doing so, it highlights the agency of people in the midst of wider networks and processes. The thesis interrogates the debate regarding the place of religion in the international development system. It argues that the historical expulsion of religion by mainstream development actors and also much of the interest in the current resurgence of religion are examples of an artificial bounding of religion as separate from a supposedly neutral secular domain. Rather than assuming a universal and essentialised definition of religion, the thesis is grounded in the particularities of how a specific religious tradition informs one particular actor. The influences of Mennonite religion on MCC are traced through time and in interconnections across cultural difference. The 'friction' of these cross-cultural encounters is profoundly generative. This necessitates close and detailed studies rather than simplistic generalisations. By examining the diverse ways in which Mennonite religion permeates throughout MCC's work in Indonesia the thesis challenges those who continue to question whether religion has a legitimate place in development activity.
title: Identifying Clusters within R&D Intensive Industries Using Local Spatial Methods
title: MAGKS - Joint Discussion Paper Series in Economics
Creators: name: Kosfeld, Reinhold
name: Lauridsen, Jorgen
Publisher: name: Philipps-Universität Marburg
Year: 2012
Subjects: R&D Intensive Industries
Economics
Wirtschaft
Spatial Clusters
Local Spatial Methods
Spatial Scan Test

description: More recently, there has been a renewed interest in cluster policies for supporting industrial and regional development. By virtue of the linkage between growth and innovation, R&D intensive industries play a crucial role in cluster development strategies. Empirical cluster research has to contribute to the understanding the process of cluster formation. Some experiences with the use of local spatial methods like local Moran‟s Ii and Getis-Ord Gi tests in pattern recognition are already available. However, up to now the utilisation of spatial scan techniques in detecting economic clusters is largely ignored (Kang, 2010). In this paper, the performance of the above-mentioned local spatial methods in identifying German R&D clusters is studied. Differences in cluster detection across the tests are traced. In particular, the contribution of Kulldorff‟s spatial scan test in detecting industry clusters is critically assessed.
Notes on Exact Multi-Soliton Solutions of Noncommutative Integrable Hierarchies
Creators: name: Hamanaka, Masashi
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We study exact multi-soliton solutions of integrable hierarchies on noncommutative space-times which are represented in terms of quasi-determinants of Wronski matrices by Etingof, Gelfand and Retakh. We analyze the asymptotic behavior of the multi-soliton solutions and found that the asymptotic configurations in soliton scattering process can be all the same as commutative ones, that is, the configuration of N-soliton solution has N isolated localized energy densities and the each solitary wave-packet preserves its shape and velocity in the scattering process. The phase shifts are also the same as commutative ones. Furthermore noncommutative toroidal Gelfand-Dickey hierarchy is introduced and the exact multi-soliton solutions are given.
description: 18 pages, v3: references added, version to appear in JHEP
Constraining the equation of state in modified gravity via universal relations
Creators: name: Danchev, Victor I.
name: Doneva, Daniela D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Modern multi-messenger astronomical observations and heavy ion experiments provide new insights into the structure of compact objects. Nevertheless, much ambiguity remains when it comes to super dense matter above the nuclear saturation density such as that found within neutron stars. This work explores equation of state (EOS)-independent universal relations between the physical parameters of static neutron stars at the maximum-mass point, previously proven for General Relativity (GR) and used to constraint EOS candidates within the GR framework. We explore 53 different EOS candidates and prove that these relations hold for scalarized neutron stars in massive scalar-tensor theories, exploring also the effect of non-baryonic EOS. We further show that the relation's fit parameters are highly dependent on the theory's parameters. On the basis of these relations multiple constraints on the EOS can be derived and it turns out that they can be significantly different than the GR ones. This demonstrates the importance of taking into account the modified gravity effects even when imposing constraints on the EOS.
description: 11 pages, 6 figures
A limit theorem of discrete Galton-Watson branching processes with immigration
Creators: name: Li, Zenghu
Publisher: name: arXiv
Year: 2006
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60J80

description: We provide a simple set of sufficient conditions for the weak convergence of discrete Galton-Watson branching processes with immigration to continuous time and continuous state branching processes with immigration.
description: 7 pages
Tuumanp 'axwé discussion and songs
Creators: name: Allen, Howard
name: Halpern, Abraham M.
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: yum

description: 2 WAV files. Side A described as "discussion", Side B as "discussion of songs." For associated notebook, see Margaret Langdon Papers (Bancroft Library), carton 9, folder 43. Digitization by the Berkeley Language Center.
Zero-error attack against coherent-one-way quantum key distribution
Creators: name: Trényi, Róbert
name: Curty, Marcos
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Coherent-one-way (COW) quantum key distribution (QKD) held the promise of distributing secret keys over long distances with a simple experimental setup. Indeed, this scheme is currently used in commercial applications. Surprisingly, however, it has been recently shown that its secret key rate scales at most quadratically with the system's transmittance and, thus, it is not appropriate for long distance QKD transmission. Such pessimistic result was derived by employing a so-called zero-error attack, in which the eavesdropper does not introduce any error, but still the legitimate users of the system cannot distill a secure key. Here, we present a zero-error attack against COW-QKD that is essentially optimal, in the sense that no other attack can restrict further its maximum achievable distance in the absence of errors. This translates into an upper bound on its secret key rate that is more than an order of magnitude lower than previously known upper bounds.
description: 12 pages, 7 figures
Colonial Modernity across the Border: Yaeyama, the Ryukyu Islands, and Colonial Taiwan
Creators: name: Matsuda, Hiroko
Publisher: name: Canberra, ACT : The Australian National University
Year: 2008

description: Contemporary scholars of imperialism and colonialism studies have revealed how different imperial spaces were malleable, and they constantly shift through negotiations between diverse agencies. Whereas most existing studies investigate change of imperial space from the view of ‘metropolitan centre’, this thesis attempts to decentralise the dominant view of existing Japanese imperialism studies, and explores the Japanese imperial expansion with a particular focus on people’s subjectivities and agencies on the national border zone. The thesis particularly focuses on the border/boundary between the Yaeyama Archipelago of the Ryukyu Islands and colonial Taiwan.
Factorization of $e^+e^- \to H \, X$ cross section, differential in $z_h$, $P_T$ and thrust, in the $2$-jet limit
Creators: name: Boglione, M.
name: Simonelli, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Factorizing the cross section for single hadron production in $e^+e^-$ annihilations is a highly non trivial task when the transverse momentum of the outgoing hadron with respect to the thrust axis is taken into account. We work in a scheme that allows to factorize the $e^+e^- \to HX$ cross section as a convolution of a calculable hard coefficient and a Transverse Momentum Dependent (TMD) fragmentation function. The result, differential in $z_h$, $P_T$ and thrust, will be given to all orders in perturbation theory and explicitly computed to Next to Leading Order (NLO) and Next to Leading Log (NLL) accuracy. The predictions obtained from our computation, applying the simplest and most natural ansatz to model the non-perturbative part of the TMD, are in exceptional agreement with the experimental measurements of the BELLE Collaboration. The factorization scheme we propose relates the TMD parton densities defined in 1-hadron and 2-hadron processes, restoring the possibility to perform global phenomenological studies of TMD physics including experimental data from semi-inclusive deep inelastic scattering, Drell-Yan processes, $e^+e^- \to H_1 H_2 X$ and $e^+e^- \to HX$ annihilations.
description: 59 pages, 8 figures
Low-lying dipole resonance in neutron-rich Ne isotopes
Creators: name: Yoshida, Kenichi
name: Van Giai, Nguyen
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Microscopic structure of the low-lying isovector dipole excitation mode in neutron-rich $^{26,28,30}$Ne is investigated by performing deformed quasiparticle-random-phase-approximation (QRPA) calculations. The particle-hole residual interaction is derived from a Skyrme force through a Landau-Migdal approximation. We have obtained the low-lying resonance in $^{26}$Ne at around 8.5 MeV. It is found that the isovector dipole strength at $E_{x}<10$ MeV exhausts about 6.0% of the classical Thomas-Reiche-Kuhn dipole sum rule. This excitation mode is composed of several QRPA eigenmodes, one is generated by a $ν(2s^{-1}_{1/2} 2p_{3/2})$ transition dominantly, and the other mostly by a $ν(2s^{-1}_{1/2} 2p_{1/2})$ transition. The neutron excitations take place outside of the nuclear surface reflecting the spatially extended structure of the $2s_{1/2}$ wave function. In $^{30}$Ne, the deformation splitting of the giant resonance is large, and the low-lying resonance is overlapping with the giant resonance.
description: 8 pages, 9 figures and 5 tables
Patterns of change, sources of influence : an historical study of the Canadian museum and the middle class, 1850-1950
Creators: name: Mak, Eileen Diana
Publisher: name: University of British Columbia
Year: 2009

description: This thesis argues the continued relationship between museums and the middle class over the period from 1850 to 1950, showing in particular how major events and trends affecting the history of the middle class influenced the manner in which museums developed. It argues, however, that, despite participation in an international bourgeois culture which included a worldwide "museum movement', the regional circumstances of both museums and the middle class in Canada had a significant effect on their related histories determining, if not the final product, at least the timing of its completion and the manner in which it was reached. This argument is made through a comparison of the histories of the Provincial Museum of Nova Scotia, the Ontario Provincial Museum, the Royal Ontario Museum, and the British Columbia Provincial Museum. For each institution, three themes are considered: the way in which its collection shaped or reflected a regional identity; the form of education it offered, the intended audience, and the ways in which both changed; and the impact of professionalization on both the museum and the people who worked in it. The comparisons show that, despite the uniqueness of the museums' collections and histories, in the final analysis, each institution conformed to the patterns of the 'museum movement', or, as in the case of professionalization, to the pattern of a professionalizing middle-class society. Informed by recent critical work on the history of museums, this thesis uses archival and secondary sources to establish the narratives of four Canadian museums and places them into the broader context of the international 'museum movement', while also indicating the uniqueness of Canadian cultural institutions created by the colonial experience. In this way, it adds a new perspective to the history of Canadian museums. At the same time, it adds to our understanding of the Canadian middle class through its demonstration of how the major societal trends affected individual members of that class.
Static observables of relativistic three-fermion systems with instantaneous interactions
Creators: name: Haupt, Christian
name: Metsch, Bernard
name: Petry, Herbert-R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show that static properties like the charge radius and the magnetic moment of relativistic three-fermion bound states with instantaneous interactions can be formulated as expectation values with respect to intrinsically defined wavefunctions. The resulting operators can be given a natural physical interpretation in accordance with relativistic covariance. We also indicate how the formalism may be generalized to arbitrary moments. The method is applied to the computation of static baryon properties with numerical results for the nucleon charge radii and the baryon octet magnetic moments. In addition we make predictions for the magnetic moments of some selected nucleon resonances and discuss the decomposition of the nucleon magnetic moments in contributions of spin and angular momentum, as well as the evolution of these contributions with decreasing quark mass.
description: 13 pages, including 2 figures and 3 tables, submitted to Eur.Phys.J. A
title: Capital Inflows and Asset Prices: Evidence from Emerging Asia
title: MAGKS - Joint Discussion Paper Series in Economics
Creators: name: Tillmann, Peter
Publisher: name: Philipps-Universität Marburg
Year: 2012
Subjects: Capital Inflows
Monetary Policy
House Prices
Economics
Wirtschaft
Panel VAR
Sign Restrictions

description: The withdrawal of foreign capital from emerging countries at the height
of the recent financial crisis and its quick return sparked a debate about the impact of capital flow surges on asset markets. This paper addresses the response of property prices to an inflow of foreign capital. For that purpose we estimate a panel VAR on a set of Asian emerging market economies, for which the waves of inflows were particularly pronounced, and identify capital inflow shocks based on sign restrictions. Our results suggest that capital inflow shocks have a significant effect on the appreciation of house prices and equity prices. Capital inflow shocks account for - roughly - twice the portion of overall house price changes they explain in OECD countries. We also address crosscountry differences in the house price responses to shocks, which are most likely due to differences in the monetary policy response to capital inflows.
E$_6$SSM
Creators: name: King, S. F.
name: Moretti, S.
name: Nevzorov, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this talk we discuss an $E_6$ inspired supersymmetric (SUSY) model with an extra $U(1)_{N}$ gauge symmetry under which right-handed neutrinos have zero charge. In this exceptional supersymmetric standard model (E$_6$SSM) the $μ$-term is generated dynamically after the electroweak symmetry breaking. We specify the particle content of the model and argue that the presence of a $Z'$ and exotic particles predicted by E$_6$SSM allows the lightest Higgs boson to be significantly heavier than in the MSSM and NMSSM. Other possible manifestations of E$_6$SSM at the LHC are also discussed.
description: Presented at XXXIII International Conference on High Energy Physics (ICHEP'06), Moscow, Russia, 26 July - 2 August and at Cairo International Conference on High Energy Physics (CICHEP II), Cairo, Egypt, 14-17 January 2006
Breaking the ring: $^{53}$Cr-NMR on the Cr$_{8}$Cd molecular nanomagnet
Creators: name: Garlatti, E.
name: Allodi, G.
name: Bordignon, S.
name: Bordonali, L.
name: Timco, G. A.
name: Winpenny, R. E. P.
name: Lascialfari, A.
name: De Renzi, R.
name: Carretta, S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: An accurate experimental characterization of finite antiferromagnetic (AF) spin chains is crucial for controlling and manipulating their magnetic properties and quantum states for potential applications in spintronics or quantum computation. In particular, finite AF chains are expected to show a different magnetic behaviour depending on their length and topology. Molecular AF rings are able to combine the quantum-magnetic behaviour of AF chains with a very remarkable tunability of their topological and geometrical properties. In this work we measure the $^{53}$Cr-NMR spectra of the Cr$_{8}$Cd ring to study the local spin densities on the Cr sites. Cr$_{8}$Cd can in fact be considered a model system of a finite AF open chain with an even number of spins. The NMR resonant frequencies are in good agreement with the theoretical local spin densities, by assuming a core polarization feld AC = -12.7 T/$μ_B$. Moreover, these NMR results confirm the theoretically predicted non-collinear spin arrangement along the Cr$_{8}$Cd ring, which is typical of an even-open AF spin chain.
Observation of Ultra-narrow Electromagnetically Induced Transparency and Slow Light using Purely Electronic Spins in a Hot Atomic Vapor
Creators: name: Goldfarb, F.
name: Ghosh, J.
name: David, M.
name: Ruggiero, J.
name: Chanelière, T.
name: Gouët, J. -L. Le
name: Gilles, H.
name: Ghosh, R.
name: Bretenaker, F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Electromagnetically induced transparency (EIT) is observed in gaseous 4He at room temperature. Ultra-narrow (less than 10 kHz) EIT windows are obtained for the first time for purely electronic spins in the presence of Doppler broadening. The positive role of collisions is emphasized through measurements of the power dependence of the EIT resonance. Measurement of slow light opens up possible ways to applications.
title: Updating Inflation Expectations
title: MAGKS - Joint Discussion Paper Series in Economics
Creators: name: Lamla, Michael J.
name: Sarferaz, Samad
Publisher: name: Philipps-Universität Marburg
Year: 2012
Subjects: Bayesian methods, disagreement
media coverage
inflation expectation formation
time-varying parameters
stochastic volatility.
Economics
Wirtschaft

description: This paper investigates how inflation expectations evolve. In particular, we analyze the time-varying nature of the propensity to update expectations and its potential determinants. For this purpose we set up a flexible econometric model that tracks the formation of inflation expectations of consumers at each moment in time. We show that the propensity to update inflation expectations changes substantially over time and is related to the quantity and the quality of news.
Semileptonic decays of baryons in a relativistic quark model
Creators: name: Migura, Sascha
name: Merten, Dirk
name: Metsch, Bernard
name: Petry, Herbert-R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate semileptonic decays of light and heavy baryons in a relativistically covariant constituent quark model. The model is based on the Bethe-Salpeter-equation in instantaneous approximation. It generates satisfactory mass spectra for mesons and baryons up to the highest observable energies. Without introducing additional free parameters we compute on this basis helicity amplitudes of electronic and muonic semileptonic decays of baryons. We thus obtain form factor ratios and decay rates in good agreement with experiment.
description: 8 pages, 10 figures, 2 tables, typos removed
Coordination and control of multi-agent systems
Creators: name: Deghat, Mohammad
Publisher: name: The Australian National University
Year: 2013
Subjects: subject: Multiagent systems Mathematical models
subject: Adaptive control systems
subject: Lyapunov functions
subject: Robots Motion Mathematical models.
subject: Sensor networks

description: This thesis focuses on three main problems: (i) target localization and circumnavigation by a single agent, (ii) formation shape and velocity control in the plane, and (iii) sensor network localization. We present the results in two main parts: (I) motion control (Chapters 2-4) and (II) sensor network localization (Chapter 5). In Chapter 2, we propose estimation and control algorithms to make an agent move on a circular trajectory around a single or a group of targets with unknown positions which might be stationary or might move slowly. We assume the agent only knows its own position with respect to its initial frame and the bearing angle to the target(s). We propose different algorithms for an agent with single integrator dynamics and an agent with non-holonomic motion constraints. Although we assume in this chapter that there is only one agent, we explain in Chapter 6 how to extend the results to the case where there is more than a single agent. In the next two chapters, we propose decentralized control algorithms to control the shape and the velocity of a formation. In Chapter 3, we propose different algorithms to control the shape and velocity, but not the orientation and the position of the center of mass, of a formation when the velocity communication graph is directed or undirected and when the formation has/does not have a leader. We use two different stability algorithms, namely the Lyapunov function and center manifold theorem, to show that the system is both asymptotically stable and locally exponentially stable. In the next chapter, we propose an algorithm to control the shape and velocity of a formation as well as its orientation and the position of its center of mass that can avoid collision with obstacles by changing the size or orientation of the formation. We also propose other collision avoidance algorithms that temporarily change the shape of the formation to avoid collision with a stationary or moving obstacle. The main feature of these algorithms is that they converge in a bounded time. In Chapter 5, we study the problem of wireless sensor network localization. We establish a differential equation for the unknown sensor positions, and show that the estimated positions of sensors converge to their actual values in a bounded time (assuming noise-free measurements). Our key assumption is that all sensors are in the convex hull of m+1 or more anchors in an m-dimensional space.
title: Regional Effects of Federal Tax Shocks
title: MAGKS - Joint Discussion Paper Series in Economics
Creators: name: Hayo, Bernd
name: Uhl, Matthias
Publisher: name: Philipps-Universität Marburg
Year: 2012
Subjects: Economics
Wirtschaft
Fiscal Policy ∙ Tax Policy ∙ Narrative Approach ∙ U.S. States ∙ Regional Effects ∙ Asymmetries in Fiscal Policy Transmission

description: This paper studies regional output asymmetries following U.S. federal tax shocks. We estimate a vector autoregressive model for each U.S. state, utilizing the exogenous tax shock series recently proposed by Romer and Romer (2010) and find considerable variations: estimated output multipliers lie between –0.2 in Utah and –3.3 in Hawaii. Statistically, the difference between state and national output effect is significant in about half the U.S. states. Analyzing the determinants of differences in the magnitude of regional tax multipliers suggests that industry composition of output and sociodemographic characteristics help explain the observed asymmetry across U.S. states in the transmission of federal tax policy.
Tuumanp 'axwé songs
Creators: name: Allen, Howard
name: Halpern, Abraham M.
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: yum

description: 2 WAV files. Date range represents each side of tape. Side B described as "complete songs." For associated notebook, see Margaret Langdon Papers (Bancroft Library), carton 9, folder 43. Digitization by the Berkeley Language Center.
Multi-Frequency Impedance Myography: The PhaseX Effect
Creators: name: Kusche, Roman
name: Ryschka, Martin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: Muscle contraction is often detected via EMG in prosthetics. However, signal disturbances due to electrode motions can lead to misinterpretations. Therefore, alternative measurement approaches are desired to increase the reliability of the results. In this work, a novel approach based on impedance myography is proposed. By means of an equivalent circuit of a muscle, its electrical characteristics during contractions are analyzed. In this analysis, a new biomedical marker named the PhaseX Effect is described. This effect is based on the specific behavior of the phase response when the muscle is contracted and is interesting due to its high signal robustness and low signal processing requirements. The resilience of this effect against electrode motion is also analyzed. Measurements of the complex impedance myography spectra are performed on the forearms of three subjects during relaxation and contraction of the corresponding muscle. The subject measurements show the expected behavior of the muscle model. Actual muscle contractions can easily be detected via a simple analysis of the phase response. For a better visualization, the measurements are repeated while acquiring a synchronized video of the moving forearm. The particular effect of the phase response during muscle contraction can be used as a new marker that can be beneficial in several applications such as prostheses control. The PhaseX Effect has high reliability and low signal processing requirements, making it advantageous over other muscle activity markers. The combination of a reliable marker and simple signal analysis promises to become a new method for prostheses control.
Cultural Mulch : an investigation into collectors who create collections of mass produced objects and of the potential significance of those objects in relation to consumer culture
Creators: name: Wills, David
Publisher: name: Canberra, ACT : The Australian National University
Year: 2011
Subjects: collecting
photography
collections
art

description: Collecting is an activity that stems from humankinds roots as hunters and gathers, when necessity rather than want, was key. This dissertation considers the strategies and motivations behind collecting in the 21st Century and what the significance is of collected objects. It considers the many guises, aims and reasons for collections being made, from the attainment of wealth and status, to the filling of personal voids, or the simple pleasures of belonging to a like-minded group of people. The dissertation charts contemporary influences in collecting behaviour, from an increased interest in celebrity, the push by corporations to market mass-produced collectibles, alternative consumer trends, and what effect the internet has had on the availability of a vast array of objects globally and locally. Back grounded by a diminishing of the earth’s resources and the production of objects at a peak, it considers the notion of futility.
title: Offsetting versus Mitigation Activities to Reduce CO2 Emissions: A Theoretical and Empirical Analysis for the U.S. and Germany
title: MAGKS - Joint Discussion Paper Series in Economics
Creators: name: Lange, Andreas
name: Ziegler, Andreas
Publisher: name: Philipps-Universität Marburg
Year: 2012
Subjects: vehicle purchase, discrete choice models
public good
voluntary provision
climate change
CO2 offsetting
Economics
Wirtschaft

description: This paper studies the voluntary provision of public goods that is partially driven by a desire to offset for individual polluting activities. We first extend existing theory and show that offsets allow a reduction in effective environmental pollution levels while not necessarily extending the consumption of a polluting good. We further show a nonmonotonic income-pollution relationship and derive comparative static results for the impact of an increasing environmental preference on purchases of offsets and mitigation activities. Several theoretical results are then econometrically tested using a novel data set on activities to reduce CO2 emissions for the case of vehicle purchases in the U.S. and Germany. We show that an increased environmental preference triggers the use of CO2 offsetting and mitigation channels in both countries. However, we find strong country differences for the purchase of CO2 offsets. While such activities are already triggered by a high general awareness of the climate change problem in the U.S., driver’s license holders in Germany need to additionally perceive road traffic as being responsible for CO2 emissions to a large extent.
Asymptotics for spherical needlets
Creators: name: Baldi, P.
name: Kerkyacharian, G.
name: Marinucci, D.
name: Picard, D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistics Theory (math.ST)
subject: Astrophysics (astro-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 62M40, 60F05, 60F17 (Primary) 62G20 (Secondary)

description: We investigate invariant random fields on the sphere using a new type of spherical wavelets, called needlets. These are compactly supported in frequency and enjoy excellent localization properties in real space, with quasi-exponentially decaying tails. We show that, for random fields on the sphere, the needlet coefficients are asymptotically uncorrelated for any fixed angular distance. This property is used to derive CLT and functional CLT convergence results for polynomial functionals of the needlet coefficients: here the asymptotic theory is considered in the high-frequency sense. Our proposals emerge from strong empirical motivations, especially in connection with the analysis of cosmological data sets.
description: Published in at http://dx.doi.org/10.1214/08-AOS601 the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
title: Financial Liberalization and Institutional Development
title: MAGKS - Joint Discussion Paper Series in Economics
Creators: name: Alzer, Markus
name: Dadasov, Ramin
Publisher: name: Philipps-Universität Marburg
Year: 2012
Subjects: institutional dimensions
liberalization reform
financial integration
institutional development
Economics
Wirtschaft

description: This paper empirically analyzes the effects of de jure financial openness
on institutional quality as captured by indicators on investment
risk, corruption level, impartiality of judiciary system as well as the effectiveness
of bureaucratic authorities. Using a panel data set of more
than 110 countries and a time span from 1984 to 2005, we show that
a higher degree of financial openness improves institutional quality in
particular by reducing investment risks. We also study the effect of a
single liberalization reform on the development of institutional quality.
Again, we find evidence for the beneficial impact of financial liberalization
with the exception of the level of corruption. We additionally
show that if financial liberalization is supported by simultaneous political
liberalization, the benign consequences of financial opening for the
institutional performance are even larger, while financial deregulation
in former socialist countries tends to worsen institutional quality.
The limits to state failure : armed non-state actors and the maintenance of social order in Afghanistan and Papua New Guinea
Creators: name: Drummond, Bruce John
Publisher: name: The Australian National University
Year: 2018
Subjects: subject: DU740.8.D78 2011
subject: Leadership Papua New Guinea
subject: Leadership Afghanistan
subject: Failed states
subject: Papua New Guinea Politics and government
subject: Afghanistan Politics and government

description: This thesis is an examination of the role of armed sub-state actors in situations where the state is weak or failing. There is a substantial body of literature on state failure and on the role of warlords. For the most part there are considerable problems with the definitions of both concepts and also strongly negative assumptions about the consequences of state failure and the role of warlords. It is suggested in this study that warlordism can be a type of transitional leadership for traditional societies, especially those where institutional structures are weak or even non-existent. For these traditional societies a transitional leader may emerge when the traditional community is threatened, a figure that might otherwise be described as a warlord. This thesis proposes to these two hypotheses. First, this thesis contends that rather than warlords being solely the product of state failure or collapse, those armed sub-state actors so labelled as "warlords" are also the result of the disruption to traditional society caused by the expansion of state power. The second hypothesis of this research project is that the focus on the apparent institutional weaknesses of the central government, and thus the mechanisms judged necessary for the functioning of the state, particularly in the delivery of essential public goods, overlooks other more enduring localised sources of legitimacy and control within countries with otherwise weak or non-existent national governmental institutions. The case studies analysing the types of warlordism in Papua New Guinea and Afghanistan highlight how state disruption distorted traditional elite structures leading to warlordism emerging quite distinctive forms in both countries. An assessment of the conduct of warlordism in both cases studies illustrates how these warlords have taken on on part of the traditional habits of leadership in their societies. The distortions attributable to the state have altered their behaviour, though, to the extent that the inclination and ability to provide public goods is severely constrained.
title: Aid Withdrawal as Punishment for Defaulting Sovereigns? An Empirical Analysis
title: MAGKS - Joint Discussion Paper Series in Economics
Creators: name: Brandt, Jana
name: Jorra, Markus
Publisher: name: Philipps-Universität Marburg
Year: 2012
Subjects: Sovereign defaults
Economics
Wirtschaft
Foreign aid
Sanctions
Default costs

description: This paper empirically investigates whether donor countries punish sovereign
defaults by reducing foreign aid 
ows. Our findings reject the hypothesis formulated in the theoretical literature that a default leads to a loss of foreign
aid for the defaulting country. Creditor countries directly affected by the
default do not reduce their aid disbursements. Hence, foreign aid is not used
as a punishment instrument. Neither can it therefore serve as an enforce-
ment mechanism for international debt contracts. Furthermore, other donors
even raise the amount of development assistance allocated to the delinquent
country by about 15% on average. Overall the amount of foreign aid given
to the defaulting country increases by 6.4%.
Functional morphology of the smallest ballistic tongue
Creators: name: Deban, Stephen
name: Segall Bloom
Publisher: name: F1000Research
Year: 2015

description: An elastic-recoil mechanism in the tongue-projection system has evolved independently in three lineages of plethodontid salamanders. This mechanism increases performance and provides thermal insensitivity to projection, allowing an advantage over muscle-powered movements at lower temperatures. We hypothesized, based on its morphology and phylogenetic relationships, that the miniaturized bolitoglossine Thorius—one of the smallest vertebrates—uses an elastic tongue-projection mechanism like other bolitoglossines (e.g., Bolitoglossa). We asked if its small adult size (~20 mm snout-vent length) limits its ability to modulate its tongue movements as do other plethodontids or has other performance consequences. Morphological examination revealed a reduced number of myofibers in its tongue muscles (e.g., ~10 fibers in the retractor muscle), and unusual folding of the hyobranchial apparatus. High-speed imaging (15 kHz) and inverse-dynamics analysis of the tongue projection and retraction movements revealed that tongue projection in Thorius is ballistic and elastically-powered, and shows low thermal dependence (Q10 of peak velocity < 1.5), while retraction is muscle powered and non-elastic. Thorius modulates its tongue movements in response to prey distance and appears to suffer no significant performance consequences of its reduced body size.
UVIT study of UV bright stars in the globular cluster NGC 4147
Creators: name: Kumar, Ranjan
name: Pradhan, Ananta C.
name: Parthasarathy, Mudumba
name: Ojha, Devendra K.
name: Mohapatra, Abhisek
name: Murthy, Jayant
name: Cassisi, Santi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present far ultraviolet (FUV) observations of globular cluster NGC 4147 using three FUV filters, BaF2 (F154W), Sapphire (F169M), and Silica (F172M) of Ultra-Violet Imaging Telescope (UVIT) on-board the \mbox{\em AstroSat} satellite. We confirmed the cluster membership of the UVIT observed sources using proper motions from Gaia data release 2 (GAIA DR2). We identified 37 blue horizontal branch stars (BHBs), one blue straggler star (BSS) and 15 variable stars using UV-optical color magnitude diagrams (CMDs). We find that all the FUV bright BHBs are second generation population stars. Using UV-optical CMDs, we identify two sub-populations, BHB1 and BHB2, among the UV-bright BHBs in the cluster with stars count ratio of 24:13 for BHB1 and BHB2. The effective temperatures (T$_{\mathrm{eff}}$) of BHB1 and BHB2 were derived using color-temperature relation of BaSTI-IAC zero-age horizontal branch (ZAHB). We found that BHB1 stars are more centrally concentrated than BHB2 stars. We also derive physical parameters of the detected FUV bright BSS by fitting younger age BaSTI-IAC isochrones on optical and UV-optical CMDs.
description: Accepted for publication in JOAA special issue "ASTROSAT-5years"
title: Do pay-as-bid auctions favor collusion? - Evidence from Germany’s market for reserve power
title: MAGKS - Joint Discussion Paper Series in Economics
Creators: name: Heim, Sven
name: Götz, Georg
Publisher: name: Philipps-Universität Marburg
Year: 2013
Subjects: Auctions
Energy Markets
Balancing Power
Market Power
Collusion
Reserve Power
Economics
Wirtschaft

description: We analyze a drastic price increase in the German auction market for reserve power, which did not appear to be driven by increased costs. Studying the market structure and individual bidding strategies, we find evidence for collusive behavior in an environment with repeated auctions, pivotal suppliers and inelastic demand. The price increase can be traced back to an abuse of the auction’s pay-as-bid mechanism by the two largest firms. In contrast to theoretical findings, we show that pay-as-bid auctions do not necessarily reduce incentives for strategic capacity withholding and collusive behavior, but can even increase them.
Charmed baryons in a relativistic quark model
Creators: name: Migura, Sascha
name: Merten, Dirk
name: Metsch, Bernard
name: Petry, Herbert-R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate mass spectra of charmed baryons within a relativistically covariant quark model based on the Bethe-Salpeter-equation in instantaneous approximation. Interactions are given by a linearly rising three-body confinement potential and a flavor dependent two-body force derived from QCD instanton effects. This model has already been successfully applied to the calculation of light flavor baryon spectra and is now extended to heavy baryons. Within the same framework we compare the results to those obtained with the more conventional one-gluon-exchange potential.
description: 13 pages, 7 figures, 7 tables, typos removed
Magnetic properties of wurtzite (Ga,Mn)As
Creators: name: Gas, Katarzyna
name: Sadowski, Janusz
name: Sawicki, Maciej
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Here we report on detailed studies of the magnetic properties of the wurtzite (Ga,Mn)As cylindrical shells. Ga$_{0.94}$Mn$_{0.06}$As shells have been grown by molecular beam epitaxy at low temperature as a part of multishell cylinders overgrown on wurtzite (Ga,In)As nanowires cores, synthesized on GaAs (111)B substrates. Our studies clearly indicate the presence of a low temperature ferromagnetic coupling, which despite a reasonably high Mn contents of 6\% is limited only to below 30~K. A set of dedicated measurements shows that despite a high structural quality of the material the magnetic order has a granular form, which gives rise to the dynamical slow-down characteristic to blocked superparamagnets. The lack of the long range order has been assigned to a very low hole density, caused primarily by numerous compensation donors, arsenic antisites, formed in the material due to a specific geometry of the growth of the shells on the nanowire template. The associated electrostatic disorder has formed a patchwork of spontaneously magnetized (macrospin) and nonmagnetic (paramagnetic) volumes in the material. Using high field results it has been evaluated that the total volume taken by the macrospins constitute about 2/3 of the volume of the (Ga,Mn)As whereas in the remaining 1/3 only paramagnetic Mn ions reside. By establishing the number of the uncoupled ions the two contributions were separated. The Arrott plot method applied to the superparamagnetic part yielded the first experimental assessment of the magnitude of the spin-spin coupling temperature within the macrospins in (Ga,Mn)As, $T_{\mathrm{C}}=28$~K. In a broader view our results constitute an important contribution to the still ongoing dispute on the true and the dominant form(s) of the magnetism in this model dilute ferromagnetic semiconductor.
description: 23 pages, 7 figures