cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Active orbital degree of freedom and potential spin-orbit-entangled moments in Kitaev magnet candidate BaCo$_2$(AsO$_4$)$_2$
Creators: name: Samanta, Subhasis
name: Detrattanawichai, Panyalak
name: Na-Phattalung, Sutassana
name: Kim, Heung-Sik
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Candidate materials for Kitaev spin liquid phase have been intensively studied recently because of their potential applications in fault-tolerant quantum computing. Although most of the studies on Kitaev spin liquid have been done in 4$d$ and 5$d$ based transition metal compounds, recently there has been a growing research interest in Co-based quasi-two-dimensional honeycomb magnets, such as BaCo$_2$(AsO$_4$)$_2$ because of formation of spin-orbit-entangled $J_{\rm eff}$ = 1/2 pseudospin moments at Co$^{2+}$ sites and potential realizations of Kitaev-like magnetism therein. Here, we obtain high-accuracy crystal and electronic structure of BaCo$_2$(AsO$_4$)$_2$ by employing a combined density functional and dynamical mean-field theory calculations, which correctly capture the Mott-insulating nature of the target system. We show that Co$^{2+}$ ions form a high spin configuration, $S=3/2$, with an active $L_{\rm eff}=1$ orbital degree of freedom, in the absence of spin-orbit coupling. The size of trigonal distortion within CoO$_6$ octahedra is found to be not strong enough to completely quench the orbital degree of freedom, so that the presence of spin-orbit coupling can give rise to the formation of spin-orbit-entangled moments and the Kitaev exchange interaction. Our finding supports recent studies on potential Kitaev magnetism in this compound and other Co-based layered honeycomb systems.
description: 10 pages, 10 figures
A Simulation-Optimization Framework To Improve The Organ Transplantation Offering System
Creators: name: Erazo, Ignacio
name: Goldsman, David
name: Keskinocak, Pinar
name: Sokol, Joel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Medical Physics (physics.med-ph)
subject: Optimization and Control (math.OC)
subject: Other Statistics (stat.OT)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We propose a simulation-optimization-based methodology to improve the way that organ transplant offers are made to potential recipients. Our policy can be applied to all types of organs, is implemented starting at the local level, is flexible with respect to simultaneous offers of an organ to multiple patients, and takes into account the quality of the organs under consideration. We describe in detail our simulation-optimization procedure and how it uses underlying real-world transplant data to inform the decision-making process. We present results using our liver and kidney models, where we show that, under our policy recommendations, more organs are utilized and the required times to allocate the organs are reduced -- sometimes dramatically.
description: 12 pages, accepted in the Winter Simulation Conference (2022)
Long-time relaxation in pilot-wave theory
Creators: name: Abraham, Eitan
name: Colin, Samuel
name: Valentini, Antony
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We initiate the study of relaxation to quantum equilibrium over long timescales in pilot-wave theory. We simulate the time evolution of the coarse-grained H-function Hbar(t) for a two-dimensional harmonic oscillator. For a (periodic) wave function that is a superposition of the first 25 energy states we confirm an approximately exponential decay of Hbar over five periods. For a superposition of only the first four energy states we are able to calculate Hbar(t) over 50 periods. We find that, depending on the set of phases in the initial wave function, Hbar can decay to a large nonequilibrium residue exceeding 10% of its initial value or it can become indistinguishable from zero (the equilibrium value). We show that a large residue in Hbar is caused by a tendency for the trajectories to be confined to sub-regions of configuration space for some wave functions, and that this is less likely to occur for larger numbers of energy states (if the initial phases are chosen randomly). Possible cosmological implications are briefly discussed.
description: 23 pages, 11 figures. Significant improvements in v2; new section on confinement of trajectories. Accepted by J. Phys. A: Math. Theor
Crossover Between Quantum and Classical Waves and High Frequency Localization Landscapes
Creators: name: Colas, David
name: Bellis, Cédric
name: Lombard, Bruno
name: Cottereau, Régis
Publisher: name: arXiv
Year: 2022
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Anderson localization is a universal interference phenomenon occurring when a wave evolves through a random medium and it has been observed in a great variety of physical systems, either quantum or classical. The recently developed localization landscape theory offers a computationally affordable way to obtain useful information on the localized modes, such as their location or size. Here we examine this theory in the context of classical waves exhibiting high frequency localization and for which the original localization landscape approach is no longer informative. Using a Webster's transformation, we convert a classical wave equation into a Schrödinger equation with the same localization properties. We then compute an adapted localization landscape to retrieve information on the original classical system. This work offers an affordable way to access key information on high-frequency mode localization.
title: Migration of prosthetic aortic valve into abdominal aorta
Creators: name: PANDA, SOURAV
Publisher: name: EURORAD
Year: 2023
Subjects: subject: Cardiovascular
subject: Cardiac
subject: CT
subject: Clinical Cases

description: Clinical History: A 51-year-old female presented to the emergency with acute onset shortness of breath and cough. There was no history of fever. She had history of rheumatic heart disease and underwent aortic and mitral valve replacement in 2020. The last echocardiography done one month ago showed appropriately placed prosthetic valves and suspected infective endocarditis in view of a mobile echogenic lesion (2.0x1.0 cm) stuck to the prosthetic aortic valve. 

description: 51 years, female
title: Ein neusachlicher Werkbundbau zwischen Traditionalismus und Expressionismus. Das Schwenninger Rathaus von Hans Herkommer
Creators: name: Cremer, Folkhard
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 42, Nr. 2 (2013), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Exponentially decreasing critical detection efficiency for any Bell inequality
Creators: name: Miklin, Nikolai
name: Chaturvedi, Anubhav
name: Bourennane, Mohamed
name: Pawłowski, Marcin
name: Cabello, Adán
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We address the problem of closing the detection efficiency loophole in Bell experiments, which is crucial for real-world applications. Every Bell inequality has a critical detection efficiency $η$ that must be surpassed to avoid the detection loophole. Here, we propose a general method for reducing the critical detection efficiency of any Bell inequality to arbitrary low values. This is accomplished by entangling two particles in $N$ orthogonal subspaces (e.g., $N$ degrees of freedom) and conducting $N$ Bell tests in parallel. Furthermore, the proposed method is based on the introduction of penalized $N$-product (PNP) Bell inequalities, for which the so-called simultaneous measurement loophole is closed, and the maximum value for local hidden-variable theories is simply the $N$th power of the one of the Bell inequality initially considered. We show that, for the PNP Bell inequalities, the critical detection efficiency decays exponentially with $N$. The strength of our method is illustrated with a detailed study of the PNP Bell inequalities resulting from the Clauser-Horne-Shimony-Holt inequality.
description: v1: 5+3 pages, 2 figures, v2: 5+7 pages, 2 figures, some details regarding the main result's proof are clarified
Health/spa tourism and social and economic regeneration in Mid Wales
Creators: name: Lloyd-Wright, Sara
Publisher: name: Cardiff Metropolitan University
Year: 2022
Subjects: Tourism economics

description: This interpretivist study investigates the case for health/spa tourism as a driver for economic regeneration in Powys, Wales as a sustainable and competitive health/spa tourism destination to answer the following questions. What are the essential ingredients for a sustainable and competitive health/spa tourism destination? What is best practice in implementing major public-private partnership projects? Has Powys got the basic ingredients for a competitive health/spa tourism destination? What would a blueprint for health/spa tourism in Powys look like? What actions would be required of key stakeholders to achieve it? The thesis presents a critical review of literature on destination development, biomedical and bio-psychological models of illness and their relationship to traditional and modern spa practices and stakeholder theory to develop a theoretical framework for a sustainable and competitive health/spa tourism destination. The research adopts a case study methodology involving data collection through semi-structured and unstructured interviews, document and archival analysis, and direct observation. Data collection comprised three key phases. The first phase involved four French case studies - three - Vichy, La Bourboule, ChÃ¢tel-Guyon - in the Auvergne and the fourth - Saint Malo in Brittany - to determine the applicability of the theoretical framework. The second phase of data collection involved a case study of Bath Spa to explore best practice in implementing major public-private partnerships for economic regeneration. The third phase provided an audit of selected resources in Powys against the framework to determine the feasibility of health/spa tourism as a focus for economic development. The thesis concludes that health/spa tourism would provide an appropriate development path for economic development in Powys and develops a set of recommendations from the best practice case studies into a blueprint for health/spa tourism in Powys and action plan identifying responsibilities for key public and private sector stakeholders in implementation of the blueprint.
Dephasing in coherent communication with weak signal states
Creators: name: Jarzyna, Marcin
name: Banaszek, Konrad
name: Demkowicz-Dobrzanski, Rafal
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We analyze the ultimate quantum limit on the accessible information for an optical communication scheme when time bins carry coherent light pulses prepared in one of several orthogonal modes and the phase undergoes diffusion after each channel use. This scheme, an example of a quantum memory channel, can be viewed as noisy pulse position modulation (PPM) keying with phase fluctuations occurring between consecutive PPM symbols. We derive a general expression for the output states in the Fock basis and implement a numerical procedure to calculate the Holevo quantity. Using asymptotic properties of Toeplitz matrices, we also present an analytic expression for the Holevo quantity valid for very weak signals and sufficiently strong dephasing when the dominant contribution comes from the single-photon sector in the Hilbert space of signal states. Based on numerical results we conjecture an inequality for contributions to the Holevo quantity from multiphoton sectors which implies that in the asymptotic limit of weak signals, for arbitrarily small dephasing the accessible information scales linearly with the average number of photons contained in the pulse. Such behaviour presents a qualitative departure from the fully coherent case.
description: 20 pages, final version
title: Neuerscheinung
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 42, Nr. 2 (2013), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Narratives of tourism experiences: An interpretative approach to understanding tourist-brand relationships
Creators: name: Westwood, Sheena
Publisher: name: Cardiff Metropolitan University
Year: 2022
Subjects: Tourism not elsewhere classified

description: This study is a reflection of the journey that I have taken as a tourism marketing researcher. Based on emergent design, it is a two phase interpretative, autoethnographic study of the relationships between tourism consumers and brands. Through the adoption of qualitative, systematic methods and projective techniques, phase one highlights the lack of consumer brand awareness and commitment to tourism products, the diversity of contemporary tourism behaviour, and reveals the necessity to adopt a far more individualistic approach to understanding tourism consumption behaviour. Phase two thus considers tourism within the context of postmodernism, focusing on the experiences of individual tourism consumers and their functional, emotional and symbolic relationships with brands. Paramount here are the concepts of reflexivity, positionality and voice, hence I actively involved the participants throughout the research process (including during the data interpretation and presentation) and foregrounded my own involvement and experiences- aspects that all contribute significantly to the richness and depth of the study. The study highlights the complexity of tourism consumption behaviour and influences. Tourism experiences are subjective, inconsistent and are influenced and informed by a range of relationships, narratives and discourses. Complex and individual expectations, aspirations, desires and insecurities are underpinned by a far greater awareness of time compression, a sense of self and intrinsic fulfilment. The study illustrates the participants' awareness of the fragility and temporality of their myriad micro-experiences, and highlights how tourism consumers interpret and infer meaning from brands, products, images and associations in the creation and preservation of the overall holiday experience. It supports the need to reach out and step beyond the safety zone of tried and tested, conventional research approaches and further develop ontological and epistemological perspectives that value consumer-centred, diverse, flexible, reflexive and participatory approaches - and judgement criteria - for tourism research.
SPHERE adaptive optics performance for faint targets
Creators: name: Jones, M. I.
name: Milli, J.
name: Blanchard, I.
name: Wahhaj, Z.
name: de Rosa, R.
name: Romero, C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Context: High contrast imaging is a powerful technique to detect and characterize planetary companions at large orbital separations from their parent stars. Aims: We aim at studying the limiting magnitude of the VLT/SPHERE Adaptive Optics system and the corresponding instrument performance for faint targets (G $\ge$ 11.0 mag). Methods: We computed coronagraphic H-band raw contrast at 300 [mas] and FWHM of the non-coronagraphic PSF, for a total of 111 different stars observed between 2016 and 2022 with IRDIS. For this, we processed a large number of individual frames that were obtained under different atmospheric conditions. We then compared the resulting raw contrast and the PSF shape as a function of the visible wave front sensor instant flux which scales with the G-band stellar magnitude. We repeated this analysis for the top 10\% and 30\% best turbulence conditions in Cerro Paranal. Results: We found a strong decrease in the coronagraphic achievable contrast for star fainter than G $\sim$ 12.5 mag, even under the best atmospheric conditions. In this regime, the AO correction is dominated by the read-out noise of the WFS detector. In particular we found roughly a factor ten decrease in the raw contrast ratio between stars with G $\sim$ 12.5 and G $\sim$ 14.0 mag. Similarly, we observe a sharp increase in the FWHM of the non-coronagraphic PSF beyond G $\sim$ 12.5 mag, and a corresponding decrease in the strehl ratio from $\sim$ 50\% to $\sim$ 20\% for the faintest stars. Although these trend are observed for the two turbulence categories, the decrease in the contrast ratio and PSF sharpness is more pronounced for poorer conditions.
description: Submitted to A&A
Study of magnetization reversal in Neel and Bloch regime of Ni and Py stripes using Kerr microscopy
Creators: name: Bhatia, Ekta
name: Hussain, Zaineb
name: Reddy, V. Raghavendra
name: Senapati, Kartik
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a systematic study of the magnetization reversal of nickel and permalloy micro-stripes with Neel and Bloch domain walls using Kerr microscopy. Magnetic field driven domain propagation was observed from higher width to lower width stripes for magnetic fields applied along the length of micro-stripes. Stripe like domains were observed with nucleation starting in lower width region followed by their propagation to higher width regions for magnetic fields applied along the width of micro-stripes. The comparison of magnetization reversal in Bloch and Néel domain wall regime showed higher domain wall density in Bloch regime for both nickel and permalloy stripes.
description: 13 pages, 5 figures
Interpolation for intersections of Hardy-type spaces
Creators: name: Kislyakov, S. V.
name: Zlotnikov, I. K.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: Let $(X,μ)$ be a space with a finite measure $μ$, let $A$ and $B$ be $w^*$-closed subalgebras of $L^{\infty}(μ)$, and let $C$ and $D$ be closed subspaces of $L^p(μ)$ ($1
description: 14 pages
title: Baden-Baden, europäische Kurstädte und das Welterbe der UNESCO. Grundzüge einer länderübergreifenden gemeinschaftlichen Bewerbung
Creators: name: Eidloth, Volkmar
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 42, Nr. 3 (2013), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Relevance of the axial anomaly at the finite-temperature chiral transition in QCD
Creators: name: Pelissetto, Andrea
name: Vicari, Ettore
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the nature of the finite-temperature chiral transition in QCD with two light flavors, in the case of an effective suppression of the the U(1)_A symmetry breaking induced by the axial anomaly, which implies the symmetry breaking U(2)_L X U(2)_R -> U(2)_V, instead of SU(2)_L X SU(2)_R -> SU(2)_V. For this purpose, we perform a high-order field-theoretical perturbative study of the renormalization-group (RG) flow of the corresponding three-dimensional multiparameter Landau-Ginzburg-Wilson Phi4 theory with the same symmetry-breaking pattern. We confirm the existence of a stable fixed point (FP), and determine its attraction domain in the space of the bare quartic parameters. Therefore, the chiral QCD transition might be continuous also if the U(1)_A symmetry is effectively restored at Tc. However, the corresponding universality class differs from the O(4) vector universality class which would describe a continuous transition in the presence of a substantial U(1)_A symmetry breaking at Tc. We estimate the critical exponents of the U(2)_L X U(2)_R -> U(2)_V universality class by computing and analyzing their high-order perturbative expansions. These results are important to discriminate among the different scenarios for the scaling behavior of QCD with two light flavors close to the chiral transition.
description: 11 pages
Unconventional domain wall magnetoresistance of patterned Ni/Nb bilayer structures below superconducting transition temperature of Nb
Creators: name: Bhatia, Ekta
name: Hussain, Zainab
name: Reddy, V. Raghavendra
name: Barber, Zoe H.
name: Senapati, Kartik
Publisher: name: arXiv
Year: 2019
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Scattering of spin-up and spin-down electrons while passing through a ferromagnetic domain wall leads to an additional resistance for transport current, usually observed prominently in constricted magnetic structures. In this report, we use the resistance of the domain wall as a probe to find indirect signatures of the theoretically predicted spin-singlet supercurrent to spin-triplet supercurrent conversion effect of ferromagnetic domain walls. Here we examine the domain wall induced resistance in Ni stripe in a bilayer Ni/Nb geometry in the normal state and in the superconducting state of Nb. By making a 6um wide gap in the top Nb layer we routed the transport current through the Ni layer in the normal state and in the superconducting state of Nb. In the normal state of Nb, in-field transport measurements showed a clear domain wall magneto-resistance (DWMR) peak near the coercive field, where the domain wall density is expected to be maximum. Interestingly, however, below the superconducting transition temperature of Nb, the DWMR peak of the Ni layer showed a sharp drop in the field range where the number of domain walls becomes maximum. This observation may be a possible signature of magnetic domain wall induced spin-triplet correlations in the Ni layer due to the direct injection of spin-singlet Cooper pairs from Nb into the magnetic domain walls.
Noisy Quantum Kernel Machines
Creators: name: Heyraud, Valentin
name: Li, Zejian
name: Denis, Zakari
name: Boité, Alexandre Le
name: Ciuti, Cristiano
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: In the noisy intermediate-scale quantum era, an important goal is the conception of implementable algorithms that exploit the rich dynamics of quantum systems and the high dimensionality of the underlying Hilbert spaces to perform tasks while prescinding from noise-proof physical systems. An emerging class of quantum learning machines is that based on the paradigm of quantum kernels. Here, we study how dissipation and decoherence affect their performance. We address this issue by investigating the expressivity and the generalization capacity of these models within the framework of kernel theory. We introduce and study the effective kernel rank, a figure of merit that quantifies the number of independent features a noisy quantum kernel is able to extract from input data. Moreover, we derive an upper bound on the generalization error of the model that involves the average purity of the encoded states. Thereby we show that decoherence and dissipation can be seen as an implicit regularization for the quantum kernel machines. As an illustrative example, we report exact finite-size simulations of machines based on chains of driven-dissipative quantum spins to perform a classification task, where the input data are encoded into the driving fields and the quantum physical system is fixed. We determine how the performance of noisy kernel machines scales with the number of nodes (chain sites) as a function of decoherence and examine the effect of imperfect measurements.
description: 18 pages, 9 figures
Defending Person Detection Against Adversarial Patch Attack by using Universal Defensive Frame
Creators: name: Yu, Youngjoon
name: Lee, Hong Joo
name: Lee, Hakmin
name: Ro, Yong Man
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Person detection has attracted great attention in the computer vision area and is an imperative element in human-centric computer vision. Although the predictive performances of person detection networks have been improved dramatically, they are vulnerable to adversarial patch attacks. Changing the pixels in a restricted region can easily fool the person detection network in safety-critical applications such as autonomous driving and security systems. Despite the necessity of countering adversarial patch attacks, very few efforts have been dedicated to defending person detection against adversarial patch attack. In this paper, we propose a novel defense strategy that defends against an adversarial patch attack by optimizing a defensive frame for person detection. The defensive frame alleviates the effect of the adversarial patch while maintaining person detection performance with clean person. The proposed defensive frame in the person detection is generated with a competitive learning algorithm which makes an iterative competition between detection threatening module and detection shielding module in person detection. Comprehensive experimental results demonstrate that the proposed method effectively defends person detection against adversarial patch attacks.
description: Accepted at IEEE Transactions on Image Processing (TIP), 2022
The four dimensional Yang--Mills partition function in the vicinity of the vacuum
Creators: name: Etesi, Gabor
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The partition function of four dimensional Euclidean, non-supersymmetric SU(2) Yang--Mills theory is calculated in the perturbative and weak coupling regime i.e. in a small open ball about the flat connection (what we call the vicinity of the vacuum) and when the gauge coupling constant acquires a small but finite value. The computation is based on various known inequalities, valid only in four dimensions, providing two-sided estimates for the exponentiated Yang--Mills action in terms of the $L^2$-norm of the derivative of the gauge potential only; these estimates then give rise to Gaussian-like infinite dimensional integrals involving the Laplacian hence can be formally computed via zeta-function and heat kernel techniques. It then turns out that these integrals give a sharp value for the partition function in the aforementioned perturbative and weak coupling regime of the theory. In the resulting expression for the partition function the original classical coupling constant is shifted to a smaller one which can be interpreted as the manifestation, in this approach, of the existence a non-trivial trivial $β$-function and asymptotic freedom in non-Abelian gauge theories.
description: LaTeX, 21 pages, no figures; final published version
Positive solutions of a nonlocal Caputo fractional BVP
Creators: name: Cabada, Alberto
name: Infante, Gennaro
Publisher: name: arXiv
Year: 2013
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: Primary 34A08, secondary 34B10, 34B18

description: We discuss the existence of multiple positive solutions for a nonlocal fractional problem recently considered by Nieto and Pimental. Our approach relies on classical fixed point index.
description: 8 pages
Gender, grocery shopping and the discourse of leisure
Creators: name: Cockburn-Wootten, Cheryl
Publisher: name: Cardiff Metropolitan University
Year: 2022
Subjects: Consumer behaviour

description: This feminist study adopts fractured foundationalism to explore the micro-politics of gendered relationships examining the day-to-day lives of ordinary men and women undertaking grocery shopping. The literature review focuses on the key theories underpinning leisure and shopping, their similarities and interrelationships. Beginning with the leisure literature and its attempts to define the leisure experiences of individuals and the role of leisure in society, it proceeds to discuss the work of key 'malestream' writers who challenge conservative notions of leisure. The importance of the contribution of feminism as an alternative critique of leisure is acknowledged. After exploring supermarket imagery and outlining contemporary trends in UK grocery retailing, the study considers the domestic realm and tensions between the rationality and hedonism of shopping emphasising the gendered frameworks which structure grocery shopping activities. The methodology moves from a functional approach through content analysis and focus groups to the use of diaries, calendars and interviews located within a feminist framework. Content analysis of advertisements of UK grocery retailers and consumer interpretations of promotional messages provide insight into retailers' images of customers and consumer reactions to these. Discussions of grocery shopping through focus groups demonstrated a leisure dimension to grocery shopping. The diaries, calendars and interviews illuminate attitudes and behaviour to grocery shopping, describing who does the shopping, visit frequency, preferred shopping days and the influence of store location. Participants perceive grocery shopping as both work and leisure but located grocery shopping within the wider discourse of leisure. It emerges that the cultural frameworks, which give context to grocery shopping, are significantly shaped in childhood experiences, which reinforce gender issues. The women in this study defined themselves through idealised role images - a perception not echoed by the male participants. The thesis supports the inclusion of grocery shopping in the discourse on gender, power and leisure, illustrating the contribution of feminist methodology to understanding cultural meanings of grocery shopping in the fabric of the everyday lives of ordinary men and women.
Combinatorial proof of the skew K-saturation theorem
Creators: name: Alexandersson, Per
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We give a combinatorial proof of the skew Kostka analogue of the K-saturation theorem. More precisely, for any positive integer k, we give an explicit injection from the set of skew semistandard Young tableaux with skew shape kλ/kμ and type kν to the set of skew semistandard Young tableaux of shape λ/μ and type ν. Based on this method, we pose some natural conjectural refinements on related problems.
description: Significantly updated version
Performance analysis in Csharp with BenchmarkDotNet: Report and Evaluation
Creators: name: Filho, Nagib
Publisher: name: Zenodo
Year: 2024
Subjects: Performance analysis
C#
BenchmarkDotNet

description: This article provides an introduction to Benchmarking in C# using the BenchmarkDotNet library, essential for performance analysis in software development. It covers everything from installation and configuration to creating benchmarks to measure the efficiency of algorithms and data structures. The text details the interpretation of results, report generation, and best practices to ensure accurate measurements.
title: Martin Freksa: Das verlorene Atlantis: Die Geschichte der Auflösung eines alten Rätsels
Creators: name: Vosteen, Markus
Publisher: name: University Library Heidelberg
Year: 2014

description: Rezension zu: Martin Freksa: Das verlorene Atlantis: Die Geschichte der Auflösung eines alten Rätsels Gebunden mit Schutzumschlag. 274 Seiten, mehrere Abbildungen. ISBN 3-931402-17-7. Klopfer und Meyer Verlag. Tübingen 1997
A Fast Minimum Degree Algorithm and Matching Lower Bound
Creators: name: Cummings, Robert
name: Fahrbach, Matthew
name: Fatehpuria, Animesh
Publisher: name: arXiv
Year: 2019
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Numerical Analysis (math.NA)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: The minimum degree algorithm is one of the most widely-used heuristics for reducing the cost of solving large sparse systems of linear equations. It has been studied for nearly half a century and has a rich history of bridging techniques from data structures, graph algorithms, and scientific computing. In this paper, we present a simple but novel combinatorial algorithm for computing an exact minimum degree elimination ordering in $O(nm)$ time, which improves on the best known time complexity of $O(n^3)$ and offers practical improvements for sparse systems with small values of $m$. Our approach leverages a careful amortized analysis, which also allows us to derive output-sensitive bounds for the running time of $O(\min\{m\sqrt{m^+}, Δm^+\} \log n)$, where $m^+$ is the number of unique fill edges and original edges that the algorithm encounters and $Δ$ is the maximum degree of the input graph. Furthermore, we show there cannot exist an exact minimum degree algorithm that runs in $O(nm^{1-\varepsilon})$ time, for any $\varepsilon > 0$, assuming the strong exponential time hypothesis. This fine-grained reduction goes through the orthogonal vectors problem and uses a new low-degree graph construction called $U$-fillers, which act as pathological inputs and cause any minimum degree algorithm to exhibit nearly worst-case performance. With these two results, we nearly characterize the time complexity of computing an exact minimum degree ordering.
description: 17 pages
Effect of La Doping on the Crystal Structure, Electric, Magnetic and Morphologic Properties of the BSCCO System
Creators: name: Rodrigues, Vivian Delmute
name: de Souza, Gisele Aparecida
name: Carvalho, Claudio Luiz
name: Zadorosny, Rafael
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Studies of the doping process can provide a better understanding of the superconducting mechanisms in cuprous oxide materials. In this work, we studied the doping effects on the crystal structure, electric, morphologic and magnetic properties of the BSCCO system with the nominal composition $Bi_{1.6}Pb_{0.4}Sr_{(2-x)}RE_xCa_2Cu_3O_{(10-δ)}$. Here, the rare earth element (RE) was replaced by La in the sites of Sr. The x was ranged from 0.0 to 2.0, in steps of 0.5. The samples were prepared based on Pechini's method. The resulting powder was pressed at room temperature and the pellets were submitted to several heat treatments. The characterizations confirm the La in the sites of Sr however, the superconducting properties of the sample were not improved.
description: 8 pages, 7 figures and 5 tables
Structure of Axion Miniclusters
Creators: name: Ellis, David
name: Marsh, David J. E.
name: Eggemeier, Benedikt
name: Niemeyer, Jens
name: Redondo, Javier
name: Dolag, Klaus
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The Peak-Patch algorithm is used to identify the densest minicluster seeds in the initial axion density field simulated from string decay. The fate of these dense seeds is found by tracking the subsequent gravitational collapse in cosmological $N$-body simulations. We find that miniclusters at late times are well described by NFW profiles, although for around 80\% of simulated miniclusters a single power-law density profile of $r^{-2.9}$ is an equally good fit due to the unresolved scale radius. Under the assumption that all miniclusters with an unresolved scale radius are described by a power-law plus axion star density profile, we identify a significant number of miniclusters that might be dense enough to give rise to gravitational microlensing if the axion mass is $0.2 \,\mathrm{meV}\lesssim m_a \lesssim 3\,\mathrm{meV}$. Higher resolution simulations resolving the inner structure and axion star formation are necessary to explore this possibility further.
description: 10+8 pages, 15 figures, v2 further comments on density profile fits, matches version accepted in Phys Rev D
On Translation Lengths of Anosov Maps on Curve Graph of Torus
Creators: name: Baik, Hyungryul
name: Kim, Changsub
name: Kwak, Sanghoon
name: Shin, Hyunshik
Publisher: name: arXiv
Year: 2019
Subjects: subject: Geometric Topology (math.GT)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 57M99, 37E30, 30F60, 32G15

description: We show that an Anosov map has a geodesic axis on the curve graph of a torus. The direct corollary of our result is the stable translation length of an Anosov map on the curve graph is always a positive integer. As the proof is constructive, we also provide an algorithm to calculate the exact translation length for any given Anosov map. The application of our result is threefold: (a) to determine which word realizes the minimal translation length on the curve graph within a specific class of words, (b) to establish the effective bound on the ratio of translation lengths of an Anosov map on the curve graph to that on Teichmüller space, and (c) to estimate the overall growth of the number of Anosov maps which have a sufficient number of Anosov maps with the same translation length.
description: 32 pages, 14 figures
Astropy Proposal for Enhancement 21: Ending Long Term Support Releases (APE 21)
Creators: name: Robitaille, Thomas
name: Lim, Pey Lian
name: Conseil, Simon
Publisher: name: Zenodo
Year: 2023

description: This APE proposes to no longer designate any releases of the core package as being "long-term support" (LTS) and provide guidance on how to handle API changes and deprecations.
Reconsidering Written Language
Creators: name: Sarma, Gopal
Publisher: name: arXiv
Year: 2013
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: A number of elite thinkers in Europe during the 16th and 17th centuries pursued an agenda which historian Paolo Rossi calls the "quest for a universal language," a quest which was deeply interwoven with the emergence of the scientific method. From a modern perspective, one of the many surprising aspects of these efforts is that they relied on a diverse array of memorization techniques as foundational elements. In the case of Leibniz's universal calculus, the ultimate vision was to create a pictorial language that could be learned by anyone in a matter of weeks and which would contain within it a symbolic representation of all domains of contemporary thought, ranging from the natural sciences, to theology, to law. In this brief article, I explore why this agenda might have been appealing to thinkers of this era by examining ancient and modern memory feats. As a thought experiment, I suggest that a society built entirely upon memorization might be less limited than we might otherwise imagine, and furthermore, that cultural norms discouraging the use of written language might have had implications for the development of scientific methodology. Viewed in this light, the efforts of Leibniz and others seem significantly less surprising. I close with some general observations about cross-cultural origins of scientific thought.
description: 11 pages
Municipal Utilities in the Energy Transition: Customer Expectations
Creators: name: Thiery, Marie-Claire
Publisher: name: Karlsruher Institut für Technologie (KIT)
Year: 2023
Subjects: Stadtwerke
Municipal Utilities
Energy Transition
Focus Groups
Customer Centric

description: The energy transition is significantly impacting the operations of municipal utilities and with it, the expectations placed on energy supply companies are evolving. Thereby digitalisation becomes increasingly important. Despite the many new technical possibilities available, the perspective and needs of the customer are often not given adequate consideration. This work gives an insight into the customer perspective concerning the expanding municipal utility portfolio by means of two focus group discussions with actual and potential municipal utility customers supplemented by two interviews with municipal utilities. The results show, that customers still primarily see municipal utilities as energy suppliers and operators of the grid infrastructure. Digital products and services offered by municipal utilities are expected to reduce bureaucracy and be easy to use. As part of the municipal utility business, local presence and proximity to customers are essential. Given the trust that customers place in municipal utilities, advice and support are gaining in importance. Transparent communication is important to maintain this trust. The use of digital media can help municipal utilities share their activities with their customers and keep them informed, thereby increasing local presence and thus their competitive advantage.
title: "Es handelt sich nicht um Affinitäten von Archäologen zum Nationalsozialismus - das ist der Nationalsozialismus"
Creators: name: Halle, Uta
name: Schmidt, Martin
Publisher: name: University Library Heidelberg
Year: 2014

description: Bericht über die internationale Tagung "Die mittel- und osteuropäische Ur- und Frühgeschichtsforschung in den Jahren 1933-1945". Berlin 19.-23. November 1998
Guaranteed methods based on constrained zonotopes for set-valued state estimation of nonlinear discrete-time systems
Creators: name: Rego, Brenner S.
name: Raffo, Guilherme V.
name: Scott, Joseph K.
name: Raimondo, Davide M.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optimization and Control (math.OC)
subject: Systems and Control (eess.SY)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper presents new methods for set-valued state estimation of nonlinear discrete-time systems with unknown-but-bounded uncertainties. A single time step involves propagating an enclosure of the system states through the nonlinear dynamics (prediction), and then enclosing the intersection of this set with a bounded-error measurement (update). When these enclosures are represented by simple sets such as intervals, ellipsoids, parallelotopes, and zonotopes, certain set operations can be very conservative. Yet, using general convex polytopes is much more computationally demanding. To address this, this paper presents two new methods, a mean value extension and a first-order Taylor extension, for efficiently propagating constrained zonotopes through nonlinear mappings. These extend existing methods for zonotopes in a consistent way. Examples show that these extensions yield tighter prediction enclosures than zonotopic estimation methods, while largely retaining the computational benefits of zonotopes. Moreover, they enable tighter update enclosures because constrained zonotopes can represent intersections much more accurately than zonotopes.
description: This includes the supplement "Supplementary material for: Guaranteed methods based on constrained zonotopes for set-valued state estimation of nonlinear discrete-time systems"
Extremal edge polytopes
Creators: name: Tran, Tuan
name: Ziegler, Günter M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics

description: The "edge polytope" of a finite graph G is the convex hull of the columns of its vertex-edge incidence matrix. We study extremal problems for this class of polytopes. For k =2, 3, 5 we determine the maximum number of vertices of k-neighborly edge polytopes up to a sublinear term. We also construct a family of edge polytopes with exponentially-many facets.
description: Final version; 16 pages, 3 figures. Published in The Electronic Journal of Combinatorics
title: Andreas Heege, Roland Heidrich, Thomas Kamphowe, et. al.: Einbeck - Negenborner Weg I: Naturwissenschaftliche Untersuchungen zu einer Töpferei des 12. und frühen 13. Jahrhunderts in Niedersachsen, 1998
Creators: name: Roehmer, Marion
Publisher: name: University Library Heidelberg
Year: 2014

description: Rezension zu: Andreas Heege, Roland Heidrich, Thomas Kamphowe, Klaus-Jürgen Leers, Daniela Paetzold, Frank Schlütz, Carola Schulze-Rehm, Ulrich Willerding: Einbeck - Negenborner Weg I: Naturwissenschaftliche Untersuchungen zu einer Töpferei des 12. und frühen 13. Jahrhunderts in Niedersachsen. Keramiktechnologie, Palaeoethnobotanik, Pollenanalyse, Archäozoologie. Studien zur Einbecker Geschichte 12. Isensee Verlag. Oldenburg 1998. S. 3 Beil. ISBN 3-89598-484-1.
General modular quantum dilogarithm and beta integrals
Creators: name: Sarkissian, Gor
name: Spiridonov, Vyacheslav P.
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We consider a univariate beta integral composed from general modular quantum dilogarithm functions and prove its exact evaluation formula. It represents the partition function of a particular $3d$ supersymmetric field theory on the general squashed lens space. Its possible applications to $2d$ conformal field theory are briefly discussed as well.
description: typos corrected, 20 pages
On the Existence of a Maximal Cauchy Development for the Einstein Equations - a Dezornification
Creators: name: Sbierski, Jan
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In 1969, Choquet-Bruhat and Geroch established the existence of a unique maximal globally hyperbolic Cauchy development of given initial data for the Einstein equations. Their proof, however, has the unsatisfactory feature that it relies crucially on the axiom of choice in the form of Zorn's lemma. In this paper we present a proof that avoids the use of Zorn's lemma. In particular, we provide an explicit construction of this maximal globally hyperbolic development.
description: 25 pages, 6 figures, v2 small changes and minor correction, v3 version accepted for publication
title: Deutsche Burgenvereinigung (Hrsg.): Burgen in Mitteleuropa. Ein Handbuch, 1999
Creators: name: Brather, Sebastian
Publisher: name: University Library Heidelberg
Year: 2014

description: Rezension zu: Deutsche Burgenvereinigung (Hrsg.): Burgen in Mitteleuropa. Ein Handbuch. Bd. I. Bauformen und Entwicklung; Bd. II. Geschichte und Burgenlandschaften Hrsg. von der Deutschen Burgenvereinigung e.V. durch Horst Wolfgang Böhme, Busso von der Dollen, Dieter Kerber, Cord Meckseper, Barbara SchockWerner, Joachim Zeune. Konrad Theiss Verlag. Stuttgart 1999. 328 u. 352 S., 189 u. 155 num. s/wAbb., 37 u. 33 Farbabb. ISBN 3806213550
Fusion (semi)rings arising from quantum groups
Creators: name: Freslon, Amaury
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Algebra (math.QA)
subject: Operator Algebras (math.OA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: We study the fusion semirings arising from easy quantum groups. We classify all the possible free ones, answering a question of T. Banica and R. Vergnioux : these are exactly the fusion rings of quantum groups without any nontrivial one-dimensional representation. We then classify the possible groups of one-dimensional representations for free easy quantum groups. As an application, we give a unified proof of the Haagerup property for a broad class of easy quantum groups, recovering as special cases previous results by M. Brannan and F. Lemeux. We end with some considerations on the description of the full fusion ring in the general case.
description: 35 pages. A flaw in the statement and proof of Thm 6.11 has been corrected