cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The effect of the three-spin interaction and the next-nearest neighbor interaction on the quenching dynamics of a transverse Ising model
Creators: name: Divakaran, Uma
name: Dutta, Amit
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the zero temperature quenching dynamics of various extensions of the transverse Ising model (TIM) when the transverse field is linearly quenched from $-\infty$ to $+\infty$ (or zero) at a finite and uniform rate. The rate of quenching is dictated by a characteristic scale given by $τ$. The density of kinks produced in these extended models while crossing the quantum critical points during the quenching process is calculated using a many body generalization of the Landau-Zener transition theory. The density of kinks in the final state is found to decay as $τ^{-1/2}$. In the first model considered here, the transverse Ising Hamiltonian includes an additional ferromagnetic three spin interaction term of strength $J_3$. For $J_3<0.5$, the kink density is found to increase monotonically with $J_3$ whereas it decreases with $J_3$ for $J_3>0.5$. The point $J_3=0.5$ and the transverse field $h=-0.5$is multicritical where the density shows a slower decay given by $τ^{-1/6}$. We also study the effect of ferromagnetic or antiferromagnetic next nearest neighbor (NNN) interactions on the dynamics of TIM under the same quenching scheme. In a mean field approximation, the transverse Ising Hamiltonians with NNN interactions are identical to the three spin Hamiltonian. The NNN interactions non-trivially modifies the dynamical behavior, for example an antiferromagnetic NNN interactions results to a larger number of kinks in the final state in comparison to the case when the NNN interaction is ferromagnetic.
description: 7 pages, 4 figures
Suppression of superconductivity in nanowires by bulk superconductors
Creators: name: Tian, Mingliang
name: Kumar, Nitesh
name: Xu, Shengyong
name: Wang, Jinguo
name: Kurtz, James S.
name: Chan, M. H. W.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Transport measurements were made on a system consisting of a zinc nanowire array sandwiched between two bulk superconducting electrodes (Sn or In). It was found that the superconductivity of Zn nanowires of 40 nm diameter is suppressed either completely or partially by the superconducting electrodes. When the electrodes are driven into their normal state by a magnetic field, the nanowires switch back to their superconducting state. This phenomenon is significantly weakened when one of the two superconducting electrodes is replaced by a normal metal. The phenomenon is not seen in wires with diameters equal to and thicker than 70 nm.
description: 4 pages, 5 figures
New Combinatorial Interpretations of the Fibonacci Numbers Squared, Golden Rectangle Numbers, and Jacobsthal Numbers Using Two Types of Tile
Creators: name: Edwards, Kenneth
name: Allen, Michael A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05A19, 11B39

description: We consider the tiling of an $n$-board (a board of size $n\times1$) with squares of unit width and $(1,1)$-fence tiles. A $(1,1)$-fence tile is composed of two unit-width square subtiles separated by a gap of unit width. We show that the number of ways to tile an $n$-board using unit-width squares and $(1,1)$-fence tiles is equal to a Fibonacci number squared when $n$ is even and a golden rectangle number (the product of two consecutive Fibonacci numbers) when $n$ is odd. We also show that the number of tilings of boards using $n$ such square and fence tiles is a Jacobsthal number. Using combinatorial techniques we prove identities involving sums of Fibonacci and Jacobsthal numbers in a straightforward way. Some of these identities appear to be new. We also construct and obtain identities for a known Pascal-like triangle (which has alternating ones and zeros along one side) whose $(n,k)$th entry is the number of tilings using $n$ tiles of which $k$ are fence tiles. There is a simple relation between this triangle and the analogous one for tilings of an $n$-board. Connections between the triangles and Riordan arrays are also demonstrated. With the help of the triangles, we express the Fibonacci numbers squared, golden rectangle numbers, and Jacobsthal numbers as double sums of products of two binomial coefficients.
description: 21 pages, 3 figures
Combined detection of nitrite and bioelectrical activity using microelectrode arrays and a phosphate buffered saline solution
Creators: name: Almeida, Fernando Luis De
name: Souza Junior, Wilmar
name: Moraes, Yann Lima
name: Dos Santos Filho, Sebastião Gomes
name: Veronez, Douglas
name: Cestari, Idagene
Publisher: name: ISEL - High Institute of Engineering of Lisbon
Year: 2021
Subjects: extracelullar local field potentials, myoblasts, gold microelectrodes, nitrite, heart.

description: This paper presents the manufacturing of a microelectrode array, on printed circuit boards (PCB) and on silicon substrate, composed of 60 to 64 gold microelectrodes (between 4 µm and 70 µm each in diameter). The sensor has a measurement total area of 0.5 cm in radius, one reference electrode (1 mm2 in area) and 28.4 mm wide and 28.4 mm long. These microelectrodes were used for checking and logging of extracelullar local field potential of cell culture and nitrite measurement in a phosphate buffered saline solution (electrolytical aqueous medium). In addition, an apparatus to shield from electromagnetic interference for connecting the arrays was designed to allow the capture of electrochemical reactions or electronic signals by the microelectrodes, for example: nitrite or cardiac potential measurement, respectively. Finally, biocompatibility tests of the array structures were performed. The preliminary electrical and biocompatibility testing, along with the collected data, has shown promising results pointing to the development of an accurate sensor after the completion of this study. The sensor has potentially a broader range of applications with only a few adaptations and due its good accuracy it can be a very useful resource for many chemical and biological applications.
description: i-ETC : ISEL Academic Journal of Electronics Telecommunications and Computers, Vol 7, No 1 (2021): Vol. 7 n.1
Geography and religion, agriculture and stewardship: the practice of agricultural stewardship in the Christian Farmers Federations of Canada
Creators: name: Paterson, John Leonard
Publisher: name: University of British Columbia
Year: 2009

description: A Christian reformational perspective is introduced and adopted. A critique of modernist, industrialising agriculture is constructed, drawing partly on the work of contemporary agrarian writers. The notion of a regenerative agriculture is advocated. The two ways in which stewardship has been used as an environmental ethic is reviewed: as resource development and conservation, and earthkeeping. The earthkeeping definition is used to formulate the normative concept of agricultural stewardship. The Christian Farmers Federation of Ontario (CFFO) was established by Dutch neo-Calvinist immigrants in the early 1950s, the Christian Farmers Federation of Alberta (CFFA) by the same community in the early 1970s. The history of these two small general farmers' organisations is detailed against the backdrop of separate Christian organisations in the Netherlands and North America. Direct links are traced back to the Christelijke Boeren- en Tuindersbond (CBTB), the Christian Farmers and Gardeners Union, established in the Netherlands in 1918. CFFO and CFFA (which changed its name to Earthkeeping in 1992) are presented as institutions reflecting a "transformational" approach to Christian social action, existing within the mainstream of modern society and agriculture, seeking to transform them. The role of stewardship and the significance of the family farm in the policies of the two Federations are analysed, along with their efforts to protect agricultural land from urban and industrial encroachment. Both Federations have become leading farmers' organisations in environmental issues. An analysis of semi-structured in-depth interviews with CFFA members and non-members in two areas of central Alberta in 1986 shows the significance of stewardship in the beliefs and farming practices of CFFA members. An ecological stewardship index is constructed to explore the use of land management practices. In general, the CFFA members interviewed were using practices that were more environmentally responsible than their neighbours, although there were differences between the two locales studied. It is concluded that the mode of institutional organisation of the two Federations has enabled their members to have more influence, to articulate their views more clearly, and to promote agricultural stewardship more widely.
Dynamical localization and slow thermalization in a class of disorder-free periodically driven one-dimensional interacting systems
Creators: name: Aditya, Sreemayee
name: Sen, Diptiman
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study if the interplay between dynamical localization and interactions in periodically driven quantum systems can give rise to anomalous thermalization behavior. Specifically, we consider one-dimensional models with interacting spinless fermions with nearest-neighbor hopping and density-density interactions, and a periodically driven on-site potential with spatial periodicity $m=2$ and $m=4$. At a dynamical localization point, these models evade thermalization either due to the presence of an extensive number of conserved quantities (for weak interactions) or due to the kinetic constraints caused by drive-induced resonances (for strong interactions). Our models therefore illustrate interesting mechanisms for generating constrained dynamics in Floquet systems which are difficult to realize in an undriven system.
description: 59 pages, 27 figures; this agrees with the published version
Generalization of nonlinear Murnaghan elastic model for viscoelastic materials
Creators: name: Garbuzov, F. E.
name: Beltukov, Y. M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: This paper presents a generalization of Murnaghan elastic material to viscoelastic behavior using the Green-Rivlin multiple-integral approach. In the linear limit, the model coincides with the generalized Maxwell model. To create a nonlinear generalization, all possible second-order corrections were included in the constitutive equations written in the internal strains representation. Using this approach, we obtained expressions for the time- and frequency-dependent nonlinear dynamic moduli. We applied the developed nonlinear viscoelastic model to the description of infinitesimal strain waves superposed on finite prestrain. Furthermore, we considered the generation of higher harmonic by the nonlinear interaction of two strain waves, which we showed can provide a method to measure all viscoelastic constants of the developed model.
Swoboda, Jörg: Die Revolution der Kerzen - Christen in den Umwälzungen der DDR
Creators: name: Müller, Beda
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 40 Nr. 2 (1991): Ökumenische Rundschau, Band 40, Heft 2
Inverse Reinforcement Learning With Constraint Recovery
Creators: name: Das, Nirjhar
name: Chattopadhyay, Arpan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: In this work, we propose a novel inverse reinforcement learning (IRL) algorithm for constrained Markov decision process (CMDP) problems. In standard IRL problems, the inverse learner or agent seeks to recover the reward function of the MDP, given a set of trajectory demonstrations for the optimal policy. In this work, we seek to infer not only the reward functions of the CMDP, but also the constraints. Using the principle of maximum entropy, we show that the IRL with constraint recovery (IRL-CR) problem can be cast as a constrained non-convex optimization problem. We reduce it to an alternating constrained optimization problem whose sub-problems are convex. We use exponentiated gradient descent algorithm to solve it. Finally, we demonstrate the efficacy of our algorithm for the grid world environment.
Topological data analysis distinguishes parameter regimes in the Anderson-Chaplain model of angiogenesis
Creators: name: Nardini, John T.
name: Stolz, Bernadette J.
name: Flores, Kevin B.
name: Harrington, Heather A.
name: Byrne, Helen M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: Angiogenesis is the process by which blood vessels form from pre-existing vessels. It plays a key role in many biological processes, including embryonic development and wound healing, and contributes to many diseases including cancer and rheumatoid arthritis. The structure of the resulting vessel networks determines their ability to deliver nutrients and remove waste products from biological tissues. Here we simulate the Anderson-Chaplain model of angiogenesis at different parameter values and quantify the vessel architectures of the resulting synthetic data. Specifically, we propose a topological data analysis (TDA) pipeline for systematic analysis of the model. TDA is a vibrant and relatively new field of computational mathematics for studying the shape of data. We compute topological and standard descriptors of model simulations generated by different parameter values. We show that TDA of model simulation data stratifies parameter space into regions with similar vessel morphology. The methodologies proposed here are widely applicable to other synthetic and experimental data including wound healing, development, and plant biology.
title: Subfossil trees suggest enhanced Mediterranean hydroclimate variability at the onset of the Younger Dryas
Creators: name: Pauly, Maren
name: Helle, Gerhard
name: Miramont, Cécile
name: Büntgen, Ulf
name: Treydte, Kerstin
name: Reinig, Frederick
name: Guibal, Frédéric
name: Sivan, Olivier
name: Heinrich, Ingo
name: Riedel, Frank
name: Kromer, Bernd
name: Balanzategui, Daniel
name: Wacker, Lukas
name: Sookdeo, Adam Sookdeo
name: Brauer, Achim
Publisher: name: Universität Potsdam
Year: 2021
Subjects: subject: 500 Naturwissenschaften und Mathematik
subject: 600 Technik, Technologie

description: Nearly 13,000 years ago, the warming trend into the Holocene was sharply interrupted by a reversal to near glacial conditions. Climatic causes and ecological consequences of the Younger Dryas (YD) have been extensively studied, however proxy archives from the Mediterranean basin capturing this period are scarce and do not provide annual resolution. Here, we report a hydroclimatic reconstruction from stable isotopes (delta O-18, delta C-13) in subfossil pines from southern France. Growing before and during the transition period into the YD (12 900-12 600 cal BP), the trees provide an annually resolved, continuous sequence of atmospheric change. Isotopic signature of tree sourcewater (delta O-18(sw)) and estimates of relative air humidity were reconstructed as a proxy for variations in air mass origin and precipitation regime. We find a distinct increase in inter-annual variability of sourcewater isotopes (delta O-18(sw)), with three major downturn phases of increasing magnitude beginning at 12 740 cal BP. The observed variation most likely results from an amplified intensity of North Atlantic (low delta O-18(sw)) versus Mediterranean (high delta O-18(sw)) precipitation. This marked pattern of climate variability is not seen in records from higher latitudes and is likely a consequence of atmospheric circulation oscillations at the margin of the southward moving polar front.
description: Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe; 1135
Black hole mass and accretion rate of Active Galactic Nuclei
Creators: name: Wu, Xue-Bing
name: Liu, F. K.
name: Wang, R.
name: Kong, M. Z.
name: Han, J. L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The determination of the central black hole mass is crucial to the understanding of AGN physics. In this paper we briefly review some methods that are currently used to estimate the black hole mass of AGNs. Particularly we demonstrate the importance of two correlations: one between the black hole mass and the stellar velocity dispersion and another one between the broad line region (BLR) size and the optical continuum luminosity. Besides applying these relations in deriving black hole masses of various types of AGNs, we also employed the fundamental plane of elliptical galaxies to estimate the central velocity dispersions of AGN host galaxies, and then the black hole masses of AGNs including BL Lac objects. In addition, we derived another empirical relation between the BLR size and H_beta emission line luminosity from AGNs with the BLR size measured by reverberation mapping studies, and argued that more accurate black hole masses of extremely radio-loud AGNs could be obtained with it than using the usual R-L_{5100Å} relation because of the jet contribution to the optical continuum. Finally we pointed out that black hole mass estimation is very much helpful to determine the accretion rate and understand the accretion process in AGNs.
description: 7 pages, 7 figures, to appear in J. Korean Physical Society; review talk presented at the 2006 Winter School on Black Hole Astrophysics, Pohang, Korea
Essays on the management of fisheries in the presence of strategic interactions
Creators: name: Ruseski, Gorazd
Publisher: name: University of British Columbia
Year: 2009

description: The following three essays present an analysis that combines well-known models of fisheries management with contemporary theories of international trade and industrial organization. The general theme of the thesis is that countries' fisheries management policies can affect the strategic interaction between their fishing industries. The first essay examines the problem of noncooperative management of international fisheries by analyzing the strategic rent-shifting roles for such well-known national management policies as fleet licensing and effort subsidies. It is shown that the noncooperative equilibrium in each policy takes the form of a prisoner's dilemma with dissipated rents in the fishery. It is also shown that strategic effort subsidies can only lead to incomplete rent dissipation but strategic fleet licensing can lead to complete rent dissipation. The second essay develops a theory of cooperative management of international fisheries by considering negotiation between countries over the same fleet licensing and effort subsidy policies considered in the first essay. The outcomes of negotiation over these policies are compared to the corresponding noncooperative outcomes, on the one hand, and to the efficient outcome on the other. It is shown that negotiation over effort subsidies in the absence of side payments is efficient, but negotiation over fleet sizes in the absence of side payments is inefficient. The third essay develops a two-stage two-period model of a 'domestic' country and a 'foreign' country whose respective fishing industries harvest from separate fisheries for the same international market. The domestic country uses a harvest policy to regulate the harvest by its fishing industry, but the harvest by the foreign fishing industry is unregulated. Two types of fisheries are considered. In the case of schooling fisheries, the domestic country may choose a conservative harvest policy in the first period if it can induce the biological collapse of the foreign fishery in the second period. In the case of search fisheries, the domestic country always chooses a conservative harvest policy in the first period in order to induce the economic degradation of the foreign fishery in the second period. The results suggest that international fisheries trade in the presence of divergent national fisheries management regimes could have unexpected consequences for world fisheries.
Trustchain -- Trustworthy Decentralised Public Key Infrastructure for Digital Credentials
Creators: name: Hobson, Tim
name: France, Lydia
name: Greenbury, Sam
name: Hare, Luke
name: Wochner, Pamela
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: The sharing of public key information is central to the digital credential security model, but the existing Web PKI with its opaque Certification Authorities and synthetic attestations serves a very different purpose. We propose a new approach to decentralised public key infrastructure, designed for digital identity, in which connections between legal entities that are represented digitally correspond to genuine, pre-existing relationships between recognisable institutions. In this scenario, users can judge for themselves the level of trust they are willing to place in a given chain of attestations. Our proposal includes a novel mechanism for establishing a root of trust in a decentralised setting via independently-verifiable timestamping. We also present a reference implementation built on open networks, protocols and standards. The system has minimal setup costs and is freely available for any community to adopt as a digital public good.
description: 10 pages, 4 figures, presented at the International Conference on AI and the Digital Economy (CADE 2023), Venice, Italy. Replaces the preprint version, with minor changes & additions based on reviewers' comments
A generalization of Ito's theorem to skew braces
Creators: name: Tsang, Cindy
Publisher: name: arXiv
Year: 2023
Subjects: subject: Group Theory (math.GR)
subject: Quantum Algebra (math.QA)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: The famous theorem of Itô in group theory states that if a group $G=HK$ is the product of two abelian subgroups $H$ and $K$, then $G$ is metabelian. We shall generalize this to the setting of a skew brace $(A,{\cdot\,},\circ)$. Our main result says that if $A = BC$ or $A = B\circ C$ is the product of two trivial sub-skew braces $B$ and $C$ which are both left and right ideals in the opposite skew brace of $A$, then $A$ is meta-trivial. One can recover Itô's Theorem by taking $A$ to be an almost trivial skew brace.
description: 35 pages; Proposition 2.4 and Corollary 2.6 were modified (there was a small mistake in the proof in version 1), and the hypothesis in Lemma 6.4 was slightly relaxed. Also fixed some typos
Time scale for the onset of Fickian diffusion in supercooled liquids
Creators: name: Szamel, Grzegorz
name: Flenner, Elijah
Publisher: name: arXiv
Year: 2005
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We propose a quantitative measure of a time scale on which Fickian diffusion sets in for supercooled liquids and use Brownian Dynamics computer simulations to determine the temperature dependence of this onset time in a Lennard-Jones binary mixture. The time for the onset of Fickian diffusion ranges between 6.5 and 31 times the $α$ relaxation time (the $α$ relaxation time is the characteristic relaxation time of the incoherent intermediate scattering function). The onset time increases faster with decreasing temperature than the $α$ relaxation time. Mean squared displacement at the onset time increases with decreasing temperature.
Synergistic Multi-spectral CT Reconstruction with Directional Total Variation
Creators: name: Cueva, Evelyn
name: Meaney, Alexander
name: Siltanen, Samuli
name: Ehrhardt, Matthias J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: Numerical Analysis (math.NA)
subject: Image and Video Processing (eess.IV)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: 65K10 (Primarly) 94A08, 68U10 (Secondary)

description: This work considers synergistic multi-spectral CT reconstruction where information from all available energy channels is combined to improve the reconstruction of each individual channel, we propose to fuse this available data (represented by a single sinogram) to obtain a polyenergetic image which keeps structural information shared by the energy channels with increased signal-to-noise-ratio. This new image is used as prior information during a channel-by-channel minimization process through the directional total variation. We analyze the use of directional total variation within variational regularization and iterative regularization. Our numerical results on simulated and experimental data show improvements in terms of image quality and in computational speed.
description: 17 pages, 17 figures
Semiclassical gravitational effects around global monopole in Brans-Dicke theory
Creators: name: Rahaman, F.
name: Ghosh, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In recent past, W.A.Hiscock [ Class.Quan.Grav. (1990) 7,6235 ] studied the semi classical gravitational effects around global monopole. He obtained the vacuum expectation value of the stress-energy tensor of an arbitrary collection of conformal mass less free quantum fields (scalar, spinor and vectors) in the space time of a global monopole. With this stress-energy tensor, we study the semi classical gravitational effects of a global monopole in the context of Brans-Dicke theory of gravity.
description: 9 pages, 5 figures. Submitted to Mod.Phys.Lett.A after minor revision
The baryon static potential from lattice QCD
Creators: name: de Forcrand, Ph.
name: Jahn, O.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Lattice QCD simulations offer the possibility of determining the potential between three static quarks from first principles. We review the status of such simulations, and the relative standing of the two theoretical proposals for the baryonic potential: the Delta law (sum of two-body terms) and the Y law (length of three flux strings joined together at a junction). We also present new results on the leading Luscher-like corrections to the asymptotic linear potential.
description: 6 pages, 4 figures; talk presented at BARYONS'04, Paris, Oct. 2004
Unique Steady-State Squeezing in a Driven Quantum Rabi Model
Creators: name: Gietka, Karol
name: Hotter, Christoph
name: Ritsch, Helmut
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Squeezing is essential to many quantum technologies and our understanding of quantum physics. Here we develop a theory of steady-state squeezing that can be generated in the closed and open quantum Rabi as well as Dicke model. To this end, we eliminate the spin dynamics which effectively leads to an abstract harmonic oscillator whose eigenstates are squeezed with respect to the physical harmonic oscillator. The generated form of squeezing has the unique property of time-independent uncertainties and squeezed dynamics, a novel type of quantum behavior. Such squeezing might find applications in continuous back-action evading measurements and should already be observable in optomechanical systems and Coulomb crystals.
description: 9 pages, 3 figures
Protocol Choice and Iteration for the Free Cornering
Creators: name: Nester, Chad
name: Voorneveld, Niels
Publisher: name: arXiv
Year: 2023
Subjects: subject: Category Theory (math.CT)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We extend the free cornering of a symmetric monoidal category, a double categorical model of concurrent interaction, to support branching communication protocols and iterated communication protocols. We validate our constructions by showing that they inherit significant categorical structure from the free cornering, including that they form monoidal double categories. We also establish some elementary properties of the novel structure they contain. Further, we give a model of the free cornering in terms of strong functors and strong natural transformations, inspired by the literature on computational effects.
description: Preprint. Article published in JLAMP. A few corrections have been made to the previous version
The Distribution of Bar and Spiral Strengths in Disk Galaxies
Creators: name: Buta, R.
name: Vasylyev, S. O.
name: Salo, H.
name: Laurikainen, E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The distribution of bar strengths in disk galaxies is a fundamental property of the galaxy population that has only begun to be explored. We have applied the bar/spiral separation method of Buta, Block, and Knapen to derive the distribution of maximum relative gravitational bar torques, Q_b, for 147 spiral galaxies in the statistically well-defined Ohio State University Bright Galaxy Survey (OSUBGS) sample. Our goal is to examine the properties of bars as independently as possible of their associated spirals. We find that the distribution of bar strength declines smoothly with increasing Q_b, with more than 40% of the sample having Q_b <= 0.1. In the context of recurrent bar formation, this suggests that strongly-barred states are relatively short-lived compared to weakly-barred or non-barred states. We do not find compelling evidence for a bimodal distribution of bar strengths. Instead, the distribution is fairly smooth in the range 0.0 <= Q_b < 0.8. Our analysis also provides a first look at spiral strengths Q_s in the OSU sample, based on the same torque indicator. We are able to verify a possible weak correlation between Q_s and Q_b, in the sense that galaxies with the strongest bars tend also to have strong spirals.
description: Accepted for publication in the Astronomical Journal, August 2005 issue (LaTex, 23 pages + 11 figures, uses aastex.cls)
Hungarian strong men: a dictator, a cardinal, and nationalism today
Creators: name: Dalina, Stephen
Publisher: name: No Publisher Supplied
Year: 2021

description: The Syrian Refugee crisis, which began in 2010, has brought Hungary and its Prime Minister Viktor Orbán to the forefront of global political news. It has revealed Hungarian political discourse is engulfed in a cyclical pattern of far-right nationalism fixated on the characteristics of ethnicity, religion, and political ideology. The emergence of these characteristics as defining traits on Hungarian nationalism indicates a failure to cope with past national trauma. This paper will delve into those traumas and analyze how past political leadership used those traumas. The paper will make a genealogy of the use of ethnicity, religion, and political ideology in figuring out how these topics are being used to persecute the Syrian Refugees.
Coherences and the thermodynamic uncertainty relation: Insights from quantum absorption refrigerators
Creators: name: Liu, Junjie
name: Segal, Dvira
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The thermodynamic uncertainty relation, originally derived for classical Markov-jump processes, provides a trade-off relation between precision and dissipation, deepening our understanding of the performance of quantum thermal machines. Here, we examine the interplay of quantum system coherences and heat current fluctuations on the validity of the thermodynamics uncertainty relation in the quantum regime. To achieve the current statistics, we perform a full counting statistics simulation of the Redfield quantum master equation. We focus on steady-state quantum absorption refrigerators where nonzero coherence between eigenstates can either suppress or enhance the cooling power, compared with the incoherent limit. In either scenario, we find enhanced relative noise of the cooling power (standard deviation of the power over the mean) in the presence of system coherence, thereby corroborating the thermodynamic uncertainty relation. Our results indicate that fluctuations necessitate consideration when assessing the performance of quantum coherent thermal machines.
description: 14 pages, 11 figures, comments and suggestions are welcome
Branched quantum wave guides with Dirichlet boundary conditions: the decoupling case
Creators: name: Post, Olaf
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 35P05; 58J50; 81V99

description: We consider a family of open sets $M_ε$ which shrinks with respect to an appropriate parameter $ε$ to a graph. Under the additional assumption that the vertex neighbourhoods are small we show that the appropriately shifted Dirichlet spectrum of $M_ε$ converges to the spectrum of the (differential) Laplacian on the graph with Dirichlet boundary conditions at the vertices, i.e., a graph operator without coupling between different edges. The smallness is expressed by a lower bound on the first eigenvalue of a mixed eigenvalue problem on the vertex neighbourhood. The lower bound is given by the first transversal mode of the edge neighbourhood. We also allow curved edges and show that all bounded eigenvalues converge to the spectrum of a Laplacian acting on the edge with an additional potential coming from the curvature.
description: 18 pages, 4 figures. to appear in a special issue of Journal of Physics A
On regular sets of affine type in finite Desarguesian planes and related codes
Creators: name: Aguglia, Angela
name: Csajbók, Bence
name: Giuzzi, Luca
Publisher: name: arXiv
Year: 2023
Subjects: subject: Combinatorics (math.CO)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 51E05, 51E20, 51E22, 94B05

description: In this paper, we consider point sets of finite Desarguesian planes whose multisets of intersection numbers with lines is the same for all but one exceptional parallel class of lines. We call such sets regular of affine type. When the lines of the exceptional parallel class have the same intersection numbers, then we call these sets regular of pointed type. Classical examples are e.g. unitals; a detailed study and constructions of such sets with few intersection numbers is due to Hirschfeld and Szőnyi from 1991. We here provide some general construction methods for regular sets and describe a few infinite families. The members of one of these families have the size of a unital and meet affine lines of $\mathrm{PG}(2, q^2)$ in one of $4$ possible intersection numbers, each of them congruent to $1$ modulo $\sqrt{q}$. As a byproduct, we determine the intersection sizes of the Hermitian curve defined over $\mathrm{GF}(q^2)$ with suitable rational curves of degree $\sqrt{q}$ and we obtain $\sqrt{q}$-divisible codes with $5$ non-zero weights. We also determine the weight enumerator of the codes arising from the general constructions modulus some $q$-powers.
description: 16 pages/revised and improved version
Improving organic residue quality to reduce CO2 emissions and promote carbon (C) accumulation in a sandy loam soil with low organic matter
Creators: name: Bhanudacha Kamolmanit
Publisher: name: Faculty of Agriculture
Year: 2019
Subjects: carbon (C)-cycling enzymes, soil organic carbon, sandy loam soil, CO2 emissions, Biochar compost

description: Khon Kaen Agriculture Journal, 47, 5, 865-876
New Heat Kernel Method in Lifshitz Theories
Creators: name: Grosvenor, Kevin T.
name: Melby-Thompson, Charles
name: Yan, Ziqi
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We develop a new heat kernel method that is suited for a systematic study of the renormalization group flow in Horava gravity (and in Lifshitz field theories in general). This method maintains covariance at all stages of the calculation, which is achieved by introducing a generalized Fourier transform covariant with respect to the nonrelativistic background spacetime. As a first test, we apply this method to compute the anisotropic Weyl anomaly for a (2+1)-dimensional scalar field theory around a z=2 Lifshitz point and corroborate the previously found result. We then proceed to general scalar operators and evaluate their one-loop effective action. The covariant heat kernel method that we develop also directly applies to operators with spin structures in arbitrary dimensions.
description: 47 pages, 1 figure; v2: appendix C updated, minor typos corrected, references added; v3: typos fixed
title: Na+ Selective Fluorescent Tools Based on Fluorescence Intensity Enhancements, Lifetime Changes, and on a Ratiometric Response
Creators: name: Schwarze, Thomas
name: Riemer, Janine
name: Müller, Holger
name: John, Leonard
name: Holdt, Hans‐Jürgen
name: Wessig, Pablo
Publisher: name: Universität Potsdam
Year: 2021
Subjects: subject: 540 Chemie und zugeordnete Wissenschaften

description: Over the years, we developed highly selective fluorescent probes for K+ in water, which show K+-induced fluorescence intensity enhancements, lifetime changes, or a ratiometric behavior at two emission wavelengths (cf. Scheme 1, K1-K4). In this paper, we introduce selective fluorescent probes for Na+ in water, which also show Na+ induced signal changes, which are analyzed by diverse fluorescence techniques. Initially, we synthesized the fluorescent probes 2, 4, 5, 6 and 10 for a fluorescence analysis by intensity enhancements at one wavelength by varying the Na+ responsive ionophore unit and the fluorophore moiety to adjust different K-d values for an intra- or extracellular Na+ analysis. Thus, we found that 2, 4 and 5 are Na+ selective fluorescent tools, which are able to measure physiologically important Na+ levels at wavelengths higher than 500 nm. Secondly, we developed the fluorescent probes 7 and 8 to analyze precise Na+ levels by fluorescence lifetime changes. Herein, only 8 (K-d=106 mm) is a capable fluorescent tool to measure Na+ levels in blood samples by lifetime changes. Finally, the fluorescent probe 9 was designed to show a Na+ induced ratiometric fluorescence behavior at two emission wavelengths. As desired, 9 (K-d=78 mm) showed a ratiometric fluorescence response towards Na+ ions and is a suitable tool to measure physiologically relevant Na+ levels by the intensity change of two emission wavelengths at 404 nm and 492 nm.
description: Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe; 1136
Beyond the Meta: Leveraging Game Design Parameters for Patch-Agnostic Esport Analytics
Creators: name: Chitayat, Alan Pedrassoli
name: Block, Florian
name: Walker, James
name: Drachen, Anders
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Esport games comprise a sizeable fraction of the global games market, and is the fastest growing segment in games. This has given rise to the domain of esports analytics, which uses telemetry data from games to inform players, coaches, broadcasters and other stakeholders. Compared to traditional sports, esport titles change rapidly, in terms of mechanics as well as rules. Due to these frequent changes to the parameters of the game, esport analytics models can have a short life-spam, a problem which is largely ignored within the literature. This paper extracts information from game design (i.e. patch notes) and utilises clustering techniques to propose a new form of character representation. As a case study, a neural network model is trained to predict the number of kills in a Dota 2 match utilising this novel character representation technique. The performance of this model is then evaluated against two distinct baselines, including conventional techniques. Not only did the model significantly outperform the baselines in terms of accuracy (85% AUC), but the model also maintains the accuracy in two newer iterations of the game that introduced one new character and a brand new character type. These changes introduced to the design of the game would typically break conventional techniques that are commonly used within the literature. Therefore, the proposed methodology for representing characters can increase the life-spam of machine learning models as well as contribute to a higher performance when compared to traditional techniques typically employed within the literature.
Spectroscopic Evidence of Superconductivity Pairing at 83 K in Single-Layer FeSe/SrTiO3 Films
Creators: name: Xu, Yu
name: Rong, Hongtao
name: Wang, Qingyan
name: Wu, Dingsong
name: Hu, Yong
name: Cai, Yongqing
name: Gao, Qiang
name: Yan, Hongtao
name: Li, Cong
name: Yin, Chaohui
name: Chen, Hao
name: Huang, Jianwei
name: Zhu, Zhihai
name: Huang, Yuan
name: Liu, Guodong
name: Xu, Zuyan
name: Zhao, Lin
name: Zhou, X. J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Single-layer FeSe films grown on the SrTiO3 substrate (FeSe/STO) have attracted much attention because of their possible record-high superconducting critical temperature Tc and distinct electronic structures in iron-based superconductors. However, it has been under debate on how high its Tc can really reach due to the inconsistency of the results obtained from the transport, magnetic and spectroscopic measurements. Here we report spectroscopic evidence of superconductivity pairing at 83 K in single-layer FeSe/STO films. By preparing high-quality single-layer FeSe/STO films, we observe for the first time strong superconductivity-induced Bogoliubov back-bending bands that extend to rather high binding energy ~100 meV by high-resolution angle-resolved photoemission measurements. The Bogoliubov back-bending band provides a new definitive benchmark of superconductivity pairing that is directly observed up to 83 K in the single-layer FeSe/STO films. Moreover, we find that the superconductivity pairing state can be further divided into two temperature regions of 64-83 K and below 64 K. We propose the 64-83 K region may be attributed to superconductivity fluctuation while the region below 64 K corresponds to the realization of long-range superconducting phase coherence. These results indicate that either Tc as high as 83 K is achievable in iron-based superconductors, or there is a pseudogap formation from superconductivity fluctuation in single-layer FeSe/STO films.
Sölle, Dorothee: Welches Christentum hat Zukunft?
Creators: name: Weiße, Wolfram
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 40 Nr. 2 (1991): Ökumenische Rundschau, Band 40, Heft 2
Topological strings and large N phase transitions II: Chiral expansion of q-deformed Yang-Mills theory
Creators: name: Caporaso, Nicola
name: Cirafici, Michele
name: Griguolo, Luca
name: Pasquetti, Sara
name: Seminara, Domenico
name: Szabo, Richard J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We continue our study of the large N phase transition in q-deformed Yang-Mills theory on the sphere and its role in connecting topological strings to black hole entropy. We study in detail the chiral theory defined in terms of uncoupled single U(N) representations at large N and write down the resulting partition function by means of the topological vertex. The emergent toric geometry has three Kaehler parameters, one of which corresponds to the expected fibration over the sphere. By taking a suitable double-scaling limit we recover the chiral Gross-Taylor string expansion. To analyse the phase transition we construct a matrix model which describes the chiral gauge theory. It has three distinct phases, one of which should be described by the closed topological string expansion. We verify this expectation by explicit comparison between the matrix model and the chiral topological string free energies. We also show that the critical point in the pertinent phase of the matrix model corresponds to a divergence of the topological string perturbation series.
description: 49 pages, 9 figures
The Frobenius formalism in Galois quantum systems
Creators: name: Vourdas, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum systems in which the position and momentum take values in the ring ${\cal Z}_d$ and which are described with $d$-dimensional Hilbert space, are considered. When $d$ is the power of a prime, the position and momentum take values in the Galois field $GF(p^ \ell)$, the position-momentum phase space is a finite geometry and the corresponding `Galois quantum systems' have stronger properties. The study of these systems uses ideas from the subject of field extension in the context of quantum mechanics. The Frobenius automorphism in Galois fields leads to Frobenius subspaces and Frobenius transformations in Galois quantum systems. Links between the Frobenius formalism and Riemann surfaces, are discussed.
Efficient Algorithms to Mine Maximal Span-Trusses From Temporal Graphs
Creators: name: Lotito, Quintino Francesco
name: Montresor, Alberto
Publisher: name: arXiv
Year: 2020
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Over the last decade, there has been an increasing interest in temporal graphs, pushed by a growing availability of temporally-annotated network data coming from social, biological and financial networks. Despite the importance of analyzing complex temporal networks, there is a huge gap between the set of definitions, algorithms and tools available to study large static graphs and the ones available for temporal graphs. An important task in temporal graph analysis is mining dense structures, i.e., identifying high-density subgraphs together with the span in which this high density is observed. In this paper, we introduce the concept of $(k, Δ)$-truss (span-truss) in temporal graphs, a temporal generalization of the $k$-truss, in which $k$ captures the information about the density and $Δ$ captures the time span in which this density holds. We then propose novel and efficient algorithms to identify maximal span-trusses, namely the ones not dominated by any other span-truss neither in the order $k$ nor in the interval $Δ$, and evaluate them on a number of public available datasets.
description: Published at the 16th International Workshop on Mining and Learning with Graphs (MLG '20)