cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Análisis de la relación existente entre los costos reales de la recolección de la basura y las tarifas establecidas
Creators: name: Arrieta Hernández, Petrona
name: De Avila Blanquicett, Marina
Publisher: name: Universidad de Cartagena
Year: 1987
Subjects: Servicios públicos
Recolección de basuras
Empresas de aseo

description: Tesis (Administrador de Empresas).--Universidad de Cartagena. Facultad de Ciencias Económicas. Programa de Administración de Empresas, 1987
description: El presente estudio tiene por objeto presentar un seguimiento al proceso de la recolección de la basura, que muestre el comportamiento de éste y su relación con el sistema de fijación de tarifas vigentes.
Amtliche Mitteilungen der Technischen Universität Dortmund Nr. 8/2008
Creators: name: (:Unkn) Unknown
Publisher: name: Technische Universität Dortmund
Year: 2008
Subjects: subject: 080

description: Ordnung zur Änderung der Prüfungsordnung für den Master-Studiengang Lehramt an Berufskollegs im Rahmen des Modellversuchs "Gestufte Studiengänge in der Lehrerbildung" an der Universität Dortmund in der Fassung vom 10.10.2006 (AM 12/2006) vom 19.05.2008
description: Ordnung zur Änderung der Prüfungsordnung für den Master-Studiengang Lehramt an Grund-, Haupt-, Realschulen und vergleichbaren Jahrgangsstufen der Gesamtschule (GHRGe) im Rahmen des Modellversuchs "Gestufte Studiengänge in der Lehrerbildung" an der Universität Dortmund in der Fassung vom 10.10.2006 (AM 12/2006) vom 19.05.2008
description: Ordnung zur Änderung der Prüfungsordnung für den Master-Studiengang Lehramt an Gymnasien und Gesamtschulen im Rahmen des Modellversuchs "Gestufte Studiengänge in der Lehrerbildung" an der Universität Dortmund in der Fassung vom 10.10.2006 (AM 12/2006) vom 19.05.2008
description: Ordnung zur Änderung der Prüfungsordnung für den Master-Studiengang Lehramt Sonderpädagogik im Rahmen des Modellversuchs "Gestufte Studiengänge in der Lehrerbildung" an der Universität Dortmund in der Fassung vom 10.10.2006 (AM 12/2006) vom 19.05.2008
description: Promotionsprüfungsordnung für die Fakultät Statistik der Technischen Universität Dortmund vom 16.05.2008
description: Verlust eines Dienstsiegels
description: Zweite Ordnung zur Änderung der Promotionsordnung für die Fakultät Statistik an der Technischen Universität Dortmund vom 16.05.2008
description: Amtliche Mitteilungen der Technischen Universität Dortmund ; 8, 2008
EOOLT 2007 – Proceedings of the 1st International Workshop on Equation-Based Object-Oriented Languages and Tools
Creators: name: (:Unkn) Unknown
Publisher: name: Technische Universität Berlin
Year: 2007
Subjects: subject: 004 Datenverarbeitung; Informatik
subject: equation-based object-oriented languages
subject: multiple application domains
subject: computer aided modeling
subject: complex systems
subject: languages

description: Computer aided modeling and simulation of complex systems, using components from multiple application domains, such as electrical, mechanical, hydraulic, control, etc., have in recent years witness0065d a significant growth of interest. In the last decade, novel equation-based object-oriented (EOO) modeling languages, (e.g. Mode- lica, gPROMS, and VHDL-AMS) based on acausal modeling using equations have appeared. Using such languages, it has become possible to model complex systems covering multiple application domains at a high level of abstraction through reusable model components. The interest in EOO languages and tools is rapidly growing in the industry because of their increasing importance in modeling, simulation, and specification of complex systems. There exist several different EOO language communities today that grew out of different application areas (multi-body system dynamics, electronic circuit simula- tion, chemical process engineering). The members of these disparate communities rarely talk to each other in spite of the similarities of their modeling and simulation needs. The EOOLT workshop series aims at bringing these different communities together to discuss their common needs and goals as well as the algorithms and tools that best support them. Despite the short deadlines and the fact that this is a new not very established workshop series, there was a good response to the call-for-papers. Thirteen papers and one presentation were accepted to the workshop program. All papers were subject to reviews by the program committee, and are present in these electronic proceedings. The workshop program started with a welcome and introduction to the area of equa- tion-based object-oriented languages, followed by paper presentations and discussion sessions after presentations of each set of related papers. On behalf of the program committee, the Program Chairmen would like to thank all those who submitted papers to EOOLT'2007. Special thanks go to David Broman who created the web page and helped with organization of the workshop. Many thanks to the program committee for reviewing the papers. EOOLT'2007 was hosted by the Technical University of Berlin, in conjunction with the ECOOP'2007 conference.
Nonequilibrium scenarios in cluster-forming quantum lattice models
Creators: name: Angelone, Adriano
name: Ying, Tao
name: Mezzacapo, Fabio
name: Masella, Guido
name: Dalmonte, Marcello
name: Pupillo, Guido
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the out-of-equilibrium physics of monodisperse bosonic ensembles on a square lattice. The effective Hamiltonian description of these systems is given in terms of an extended Hubbard model with cluster-forming interactions relevant to experimental realizations with cold Rydberg-dressed atoms. The ground state of the model, recently investigated in Phys. Rev. Lett. 123, 045301 (2019), features, aside from a superfluid and a stripe crystalline phase occurring at small and large interaction strength $V$, respectively, a rare first-order transition between an isotropic and an anisotropic stripe supersolid at intermediate $V$. By means of quantum Monte Carlo calculations we show that the equilibrium crystal may be turned into a glass by simulated temperature quenches and that out-of-equilibrium isotropic (super)solid states may emerge also when their equilibrium counterparts are anisotropic. These out-of-equilibrium states are of experimental interest, their excess energy with respect to the ground state being within the energy window typically accessed in cold atom experiments. We find, after quenching, no evidence of coexistence between superfluid and glassy behavior. Such an absence of superglassiness is qualitatively explained.
description: 8 pages, 6 figures
Unpredictable mixed-valence reinforcement promotes a generalized anxiety-like state in genetically heterogeneous mice
Creators: name: Crawford, Dylan William
Publisher: name: No Publisher Supplied
Year: 2023

description: Anxiety, an emotion that can be protective to an individual during adverse conditions, has the ability to reach levels of psychopathology in humans when left unchecked. This increasingly common psychopathological outcome has led to increasing attention from the fields of psychology and neuroscience in the continued search for clinically relevant treatment options. As a necessity to investigating novel clinical treatment options, psychologists have been tasked with developing animal laboratory models to approximate clinical anxiety. While there have been a plethora of attempts to model this psychopathology, we find that many previously described models fail to make sufficient contact with the etiology and descriptions of anxiety disorders in humans. Here we describe three studies aimed at developing a novel rodent model wherein mice exhibit anxiety-like behaviors through behavioral manipulations meant to approximate anxiety-inducing circumstances in humans. Animals were chronically subjected to conditioning manipulations in which behavioral responses or cues were paired with unpredictable reward or punishment aimed at inducing a chronic state of “apprehensive expectation”. Animals’ pre- and post-manipulation anxiety-like behaviors were assessed using batteries of behavioral measures including an open field, light/dark box, elevated plus maze, social boxes, startle response, marble burying, and corticosterone assay. In studies that used an operant conditioning manipulation wherein the animal made active choices to engage with the stimuli (Studies 1 and 3), we found that animals exhibited significantly more anxiety-like behaviors after the behavioral experience with mixed valance reinforcement. In contrast, a study using a similar procedure with a classical conditioning manipulation (wherein the animals were passively exposed to stimuli; Study 2) resulted in no significant change in anxiety-like behaviors from pre-manipulation levels. In total, the results provide support that a specific cognitive state induction (achieved specifically through active engagement with unpredictable mixed-valance stimuli) may be sufficient to induce a chronic generalized anxiety in mice.
The interaction of the immune system with skeletal muscle during respiratory viral infection of the elderly
Creators: name: Sagawe, Johanna Sophie
Publisher: name: Imperial College London
Year: 2020

description: The population of the world is ageing. Respiratory syncytial virus (RSV) is emerging as a leading cause of severe respiratory tract infection in the elderly. Loss of muscle mass occurs naturally with age, but can be exacerbated by inflammation, inactivity, or chronic disease, leading to increased risk of morbidity and mortality. If and how RSV infection promotes muscle wasting in the elderly is unknown. This study has developed an aged mouse model to investigate muscle wasting after RSV infection. 12-week-old and 80-week-old female C57BL/6 mice were infected with the same dose of RSV A2. Compared to young mice, elderly mice displayed enhanced RSV disease, including increased weight loss, viral load, and cellular airway infiltration. Elderly, but not young, mice displayed signs of muscle wasting following RSV infection, including decreased tibialis anterior muscle weight, increased expression of muscle atrophy-promoting enzymes, decreased muscle fibre size, and a failure to upregulate muscle protein synthesis. Elderly mice also displayed an impaired antibody response as evidenced by decreased anti-RSV IgG titres, but this was not due to reduced numbers of RSV-specific Tfh cells or germinal centre B cells. Blocking GDF-15, a TGF-β superfamily cytokine associated with muscle wasting and loss of appetite, which was produced in the elderly lung following RSV infection, unexpectedly led to signs of enhanced muscle wasting in elderly mice infected with RSV, suggesting a tissue-protective effect of GDF-15. Blocking IL-6R did not have consistent effects in elderly mice infected with RSV, potentially due to counteracting effects on systemic inflammation, the antibody response, and skeletal muscle. These results demonstrate that RSV infection promotes muscle wasting in an age-dependent manner, potentially regulated by GDF-15. This model is a useful tool for mechanistic studies and could be used in the future for the development of vaccines and treatments for RSV for the elderly.
title: eScience
title: Welche Vision soll da eigentlich Realität werden?
titleType: AlternativeTitle
Creators: name: Oßwald, Achim
Publisher: name: Technische Universität Dortmund
Year: 2006
Subjects: subject: 000

description: eScience, also Wissenschaft unter den Bedingungen digitaler Arbeitsumgebungen, hat nicht nur effizientere, sondern auch viel umfassendere Wissenschaftsprozesse zum Ziel, als sie in traditionellen Arbeitsumgebungen bislang möglich waren. Dies soll ermöglicht werden durch Grid-Computing und darauf aufbauenden Diensten, die den Informationsaustausch und die damit beförderte Zusammenarbeit von Wissenschaftlern intensivieren, international kompatibel und wettbewerbsfähiger machen sollen. Die eScience-Initiative des BMBF hat hierfür einen Förderrahmen bereitgestellt. Die nun in Gang kommenden Projekte geben einen konkreteren Einblick in das, was mit eScience erwartet werden kann. Die Möglichkeiten und Grenzen dieser Vorhaben, aber auch die veränderten Anforderungen an Wissenschaftler und Informationsdienstleister werden im Vortrag thematisiert.
Wavelet-Based Segmentation on the Sphere
Creators: name: Cai, Xiaohao
name: Wallis, Christopher G. R.
name: Chan, Jennifer Y. H.
name: McEwen, Jason D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Segmentation, a useful/powerful technique in pattern recognition, is the process of identifying object outlines within images. There are a number of efficient algorithms for segmentation in Euclidean space that depend on the variational approach and partial differential equation modelling. Wavelets have been used successfully in various problems in image processing, including segmentation, inpainting, noise removal, super-resolution image restoration, and many others. Wavelets on the sphere have been developed to solve such problems for data defined on the sphere, which arise in numerous fields such as cosmology and geophysics. In this work, we propose a wavelet-based method to segment images on the sphere, accounting for the underlying geometry of spherical data. Our method is a direct extension of the tight-frame based segmentation method used to automatically identify tube-like structures such as blood vessels in medical imaging. It is compatible with any arbitrary type of wavelet frame defined on the sphere, such as axisymmetric wavelets, directional wavelets, curvelets, and hybrid wavelet constructions. Such an approach allows the desirable properties of wavelets to be naturally inherited in the segmentation process. In particular, directional wavelets and curvelets, which were designed to efficiently capture directional signal content, provide additional advantages in segmenting images containing prominent directional and curvilinear features. We present several numerical experiments, applying our wavelet-based segmentation method, as well as the common K-means method, on real-world spherical images. These experiments demonstrate the superiority of our method and show that it is capable of segmenting different kinds of spherical images, including those with prominent directional features. Moreover, our algorithm is efficient with convergence usually within a few iterations.
Lanelater lacertosus
Creators: name: Hoffmannova, Johana
name: Packova, Gabriela
name: Prosvirov, Alexander S.
name: Akhter, Muhammad Atique
name: Kundrata, Robin
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Elateridae
Lanelater
Lanelater lacertosus

description: Lanelater lacertosus (Candèze, 1857)
Agrypnus lacertosus Candèze, 1857: 38.
Lanelater lacertosus Arnett, 1952: 105. For more information, including synonyms, see Hayek (1973).
Distribution. Nepal, Pakistan; Oriental Region (Cate 2007).
Literature. Cate (2007: 102): catalogue.
Remark. This species was originally described from Bangladesh (as East Pakistan; Candèze, 1857). Cate (2007) listed this species also from Nepal and Pakistan but subsequent authors dealing with the agrypnine fauna of Pakistan did not mention this species (e.g., Akhter et al. 2012 a, 2012b, 2014; Naz et al. 2012). Therefore, the occurrence of this species in Pakistan needs confirmation.
description: Published as part of Hoffmannova, Johana, Packova, Gabriela, Prosvirov, Alexander S., Akhter, Muhammad Atique & Kundrata, Robin, 2023, An updated catalogue of Agrypninae (Coleoptera: Elateridae) from Pakistan, pp. 281-305 in Zootaxa 5270 (2) on page 299, DOI: 10.11646/zootaxa.5270.2.6, http://zenodo.org/record/7864780
Finite-Size Scaling of a First-Order Dynamical Phase Transition: Adaptive Population Dynamics and an Effective Model
Creators: name: Nemoto, Takahiro
name: Jack, Robert L.
name: Lecomte, Vivien
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We analyze large deviations of the time-averaged activity in the one dimensional Fredrickson-Andersen model, both numerically and analytically. The model exhibits a dynamical phase transition, which appears as a singularity in the large deviation function. We analyze the finite-size scaling of this phase transition numerically, by generalizing an existing cloning algorithm to include a multi-canonical feedback control: this significantly improves the computational efficiency. Motivated by these numerical results, we formulate an effective theory for the model in the vicinity of the phase transition, which accounts quantitatively for the observed behavior. We discuss potential applications of the numerical method and the effective theory in a range of more general contexts.
description: 20 pages, 10 figures
Wikipedia als Referenzorgan
Creators: name: Voß, Jakob
Publisher: name: Technische Universität Dortmund
Year: 2006
Subjects: subject: 000

description: Wikipedia wird inzwischen von vielen Nutzern regelmäßig als Nachschlagewerk genutzt. Aufgrund des offenen Charakters der Online-Enzyklopädie, bei der sich jeder direkt beteiligen kann, ist jedoch zusätzliche Medienkompetenz notwendig, um die Qualität einzelner Wikipedia-Artikel einschätzen zu können. Im Vortrag sollen Methoden zur Beurteilung von Wikipedia-Artikeln dargestellt und die Frage beleuchtet werden, unter welchen Umständen Wikipedia als Referenzorgan geeignet ist.
Reasoning about Strategies: on the Satisfiability Problem
Creators: name: Mogavero, Fabio
name: Murano, Aniello
name: Perelli, Giuseppe
name: Vardi, Moshe Y.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: F.3.1; F.4.1

description: Strategy Logic (SL, for short) has been introduced by Mogavero, Murano, and Vardi as a useful formalism for reasoning explicitly about strategies, as first-order objects, in multi-agent concurrent games. This logic turns out to be very powerful, subsuming all major previously studied modal logics for strategic reasoning, including ATL, ATL*, and the like. Unfortunately, due to its high expressiveness, SL has a non-elementarily decidable model-checking problem and the satisfiability question is undecidable, specifically Sigma_1^1. In order to obtain a decidable sublogic, we introduce and study here One-Goal Strategy Logic (SL[1G], for short). This is a syntactic fragment of SL, strictly subsuming ATL*, which encompasses formulas in prenex normal form having a single temporal goal at a time, for every strategy quantification of agents. We prove that, unlike SL, SL[1G] has the bounded tree-model property and its satisfiability problem is decidable in 2ExpTime, thus not harder than the one for ATL*.
description: arXiv admin note: text overlap with arXiv:1112.6275, arXiv:1202.1309
Untersuchung der Beziehung zwischen Struktur und Aktivität der Dam DNA-Methyltransferase aus Escherichia coli mit Hilfe von biochemischen und biophysikalischen Methoden
Creators: name: Wielitzek, Lilianna
Publisher: name: Universität Dortmund
Year: 2002
Subjects: subject: Methyltransferasen
subject: Basenausklapp­Mechanismus
subject: Dam DNA­MTase aus E. col
subject: 2­Aminopurin
subject: Photocrosslinking
subject: Fluoreszenztitrationen
subject: Analytische Ultrazentrifugation
subject: Transientenkinetik
subject: Kristallisation
subject: 540

description: Neben den in DNA natürlich vorkommenden Nukleobasen Adenin, Cytosin, Guanin und Thymin findet man auch die methylierten Basen N6­Methyladenin, N4­Methylcytosin und C5­Methylcytosin. Durch diese Methylierung wird der Informationsgehalt der DNA erhöht und dient verschiedenen Systemen innerhalb der Zelle als Signal. Die Modifikation wird durch DNA­Methyltransferasen (DNA­MTasen) katalysiert. In dieser Arbeit wird die Bindung der Dam DNA­MTase aus Escherichia coli, welche zu der Gruppe der N6­Adenin DNA­MTasen gehört , an DNA charakterisiert. Dieses Enzym bindet dabei als Dimer an die DNA und übertägt die Methylgruppe mittels eines Basenausklapp­Mechanismus. Weiterhin konnte die Dam DNA­MTase kristallisiert werden und der Tyrosinrest des hochkonservierten DPPY­Motivs als an der DNA­Bindung beteiligte Aminosäure identifiziert werden.
Estudio de mercadeo para la comercialización de combustibles marinos en la Bahía de Cartagena
Creators: name: Cordero Blanco, Jhon Luis
name: López Munera, Carmen Lucia
Publisher: name: Universidad de Cartagena
Year: 1998
Subjects: Mercadeo
Combustibles - Industria y comercio
Investigación de mercados

description: Tesis (Administrador de Empresas).--Universidad de Cartagena. Facultad de Ciencias Económicas. Programa de Administración de Empresas, 1998
description: El presente estudio tiene por objeto analizar y caracterizar el mercado de combustibles marinos desde el punto de vista de demanda, oferta, grado de satisfacción y motivos de compra que permita su comercialización con eficiencia y calidad
title: SCARC
title: ein verallgemeinertes Gebietszerlegungs-/Mehrgitterkonzept auf Parallelrechnern
titleType: AlternativeTitle
Creators: name: Kilian, Susanne
Publisher: name: Universität Dortmund
Year: 2003
Subjects: subject: Finite Elemente
subject: High Performance Computing
subject: Parallelisierung
subject: Mehrgitterverfahren
subject: Gebietszerlegungsverfahren
subject: 510

description: In der vorliegenden Dissertation wird eine Brücke zwischen effienter Numerik und hardwareorientiertem Software-Design geschlagen, um die präzise Simulation komplexer Probleme aus dem industriellen Anwendungsbereich mit Schwerpunkt Strömungsmechanik zu gewährleisten. Als Prototyp für elliptische Differentialgleichungen 2. Ordnung ist in diesem Zusammenhang die Poisson-Gleichung von großer Bedeutung, deren effiziente und robuste parallele Lösung auf Basis von Diskretisierungen durch finite Elemente im Mittelpunkt der Arbeit steht. Im Rahmen der betrachteten Problemklassen ist man typischerweise mit sehr komplizierten Rechengebieten konfrontiert, deren knotenoptimale Diskretisierung häufig in ausgesprochen großen Gitteranisotropien resultiert. Dies stellt höchste Anforderungen an die Robustheit der verwendeten Löser. Gleichzeitig handelt es sich um äußerst hochdimensionale Probleme mit mehreren Millionen Unbekannten in Ort und Zeit, deren effiziente Lösung nur auf Hochleistungscomputern insbesondere vom Typ Parallelrechner erfolgen kann, was eine entsprechende `parallele' Anpassung der betrachteten Verfahren voraussetzt. Nicht zuletzt ist eine maximale Ausbeute potentieller Rechnerleistung nur durch ein detailliertes Verständnis wesentlicher Hard- und Software-Konzepte möglich. Als wichtige Schlüsseltechniken sind hier Datenlokalität, optimale Cache-Ausnutzung und Parallelisierung zu nennen. Zur Lösung der resultierenden Gleichungssysteme wird das verallgemeinerte Gebietszerlegungs- und Mehrgitterkonzept ScaRC (Scalable Recursive Clustering) vorgestellt, das die Vorteile von Gebietszerlegungsverfahren (hohe parallele Effizienz) und Mehrgitterver- fahren (hohe numerische Effizienz) in geeigneter Weise kombiniert. ScaRC basiert grundlegend auf der Kombination eines globalen, datenparallelisierten Mehrgitterverfahrens mit der blockweisen Glättung durch optimierte lokale Mehrgitterverfahren. Umfangreiche Testreihen belegen die Robustheit dieses Ansatzes, sofern lokale Anisotropien innerhalb einzelner Teilgebiete versteckt werden. Die Qualität der lokalen Lösungsprozesse führt zu einer nachhaltigen Verbesserung des globalen Konvergenzverhaltens. Durch die weitgehende lokale Beschränkung auf verallgemeinerte Tensorprodukt-Gitter in Kombination mit hochregulären Datenstrukturen bzw. optimierter Linearer Algebra werden hohe lokale MFlop/s- Raten erzielt, die durch entsprechende parallele Techniken und Datenstrukturen auch auf das globale (parallele) Problem übertragen werden können. Insgesamt resultiert eine hohe laufzeittechnische Effizienz, was durch praxisrelevante Testreihen untermauert wird.
Quantum Transitions of Nematic Phases in a Spin-$1$ Bilinear-Biquadratic Model and Their Implications for FeSe
Creators: name: Hu, Wen-Jun
name: Lai, Hsin-Hua
name: Gong, Shou-Shu
name: Yu, Rong
name: Dagotto, Elbio
name: Si, Qimiao
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Since its discovery, iron-based superconductivity has been known to develop near an antiferromagnetic order, but this paradigm fails in the iron chalcogenide FeSe, whose single-layer version holds the record for the highest superconducting transition temperature in the iron-based superconductors. The striking puzzle that FeSe displays nematic order (spontaneously broken lattice rotational symmetry) while being non-magnetic, has led to several competing proposals for its origin in terms of either the $3d$-electron's orbital degrees of freedom or spin physics in the form of frustrated magnetism. Here we argue that the phase diagram of FeSe under pressure could be qualitatively described by a quantum spin model with highly frustrated interactions. We implement both the site-factorized wave-function analysis and the large-scale density matrix renormalization group (DMRG) in cylinders to study the spin-$1$ bilinear-biquadratic model on the square lattice, and identify quantum transitions from the well-known $(π,0)$ antiferromagnetic state to an exotic $(π,0)$ antiferroquadrupolar order, either directly or through a $(π/2,π)$ antiferromagnetic state. These many phases, while distinct, are all nematic. We also discuss our theoretical ground-state phase diagram for the understanding of the experimental low-temperature phase diagram obtained by the NMR [P. S. Wang {\it et al.}, Phys. Rev. Lett. 117, 237001 (2016)] and X-ray scattering [K. Kothapalli {\it et al.}, Nature Communications 7, 12728 (2016)] measurements in pressurized FeSe. Our results suggest that superconductivity in a wide range of iron-based materials has a common origin in the antiferromagnetic correlations of strongly correlated electrons.
description: 11 pages, 9 figures
Microscopic Theory of Resistive Switching in Ordered Insulators: Electronic vs. Thermal Mechanism
Creators: name: Li, Jiajun
name: Aron, Camille
name: Kotliar, Gabriel
name: Han, Jong E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the dramatic switch of resistance in ordered correlated insulators, when driven out of equilibrium by a strong voltage bias. Microscopic calculations on a driven-dissipative lattice of interacting electrons explain the main experimental features of resistive switching (RS), such as the hysteretic $I$-$V$ curves and the formation of hot conductive filaments. The energy-resolved electron distribution at the RS reveals the underlying nonequilibrium electronic mechanism, namely Landau-Zener tunneling, and also justifies a thermal description where the hot-electron temperature, estimated from the first moment of the distribution, matches the equilibrium phase transition temperature. We discuss the tangled relationship between filament growth and negative differential resistance, and the influence of crystallographic structure and disorder in the RS.
description: 16 pages, 5 figures
Survey on Misbehavior Detection in Cooperative Intelligent Transportation Systems
Creators: name: van der Heijden, Rens W.
name: Dietzel, Stefan
name: Leinmüller, Tim
name: Kargl, Frank
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Cooperative Intelligent Transportation Systems (cITS) are a promising technology to enhance driving safety and efficiency. Vehicles communicate wirelessly with other vehicles and infrastructure, thereby creating a highly dynamic and heterogeneously managed ad-hoc network. It is these network properties that make it a challenging task to protect integrity of the data and guarantee its correctness. A major component is the problem that traditional security mechanisms like PKI-based asymmetric cryptography only exclude outsider attackers that do not possess key material. However, because attackers can be insiders within the network (i.e., possess valid key material), this approach cannot detect all possible attacks. In this survey, we present misbehavior detection mechanisms that can detect such insider attacks based on attacker behavior and information analysis. In contrast to well-known intrusion detection for classical IT systems, these misbehavior detection mechanisms analyze information semantics to detect attacks, which aligns better with highly application-tailored communication protocols foreseen for cITS. In our survey, we provide an extensive introduction to the cITS ecosystem and discuss shortcomings of PKI-based security. We derive and discuss a classification for misbehavior detection mechanisms, provide an in-depth overview of seminal papers on the topic, and highlight open issues and possible future research trends.
description: 33 pages, 7 figures, 5 tables. This article is the author version of an accepted IEEE COMST article (see DOI), which is currently available as early access through https://ieeexplore.ieee.org/document/8477005
Smooth duality and co-contra correspondence
Creators: name: Positselski, Leonid
Publisher: name: arXiv
Year: 2016
Subjects: subject: Category Theory (math.CT)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: The aim of this paper is to explain how to get a complex of smooth representations out of the dual vector space to a smooth representation of a p-adic Lie group, in natural characteristic. The construction does not depend on any finiteness/admissibility assumptions. Imposing such an assumption, one obtains an involutive duality on the derived category of complexes of smooth modules with admissible cohomology modules. The paper can serve as an introduction to the results about representations of locally profinite groups contained in the author's monograph on semi-infinite homological algebra arXiv:0708.3398.
description: LaTeX 2e with pb-diagram and xy-pic; 64 pages, 16 commutative diagrams; v.4: expanded with many explanations added to make the exposition more accessible to a wider audience; a treatment of admissibility conditions and the involutive triangulated duality added as the second half of the paper; v.5: several misprints corrected, the numbering of sections shifted to agree with the journal version
Synthesis of chiral saturated heterocycles from diazo compounds for pharmaceutical screening collections
Creators: name: Boddy, Alexander
Publisher: name: Imperial College London
Year: 2020

description: New synthetic methods that enable rapid access to new heterocyclic structures in biologically relevant chemical space provide important opportunities in drug discovery. In this thesis, novel saturated heterocycles were targeted as C(sp3)-rich motifs to enrich existing pharmaceutical compound libraries. Initially, the synthesis of 2,2-disubstituted saturated nitrogen heterocycles, as 2-aryl proline analogues, is described. These products are synthesised through an N–H insertion of diazo compounds followed by one-pot cyclisation using mild base. The use of the same method to access 4- to 7-membered scaffolds is shown. The flexibility of the methodology is demonstrated by application to drug and natural product functionalisation. The utility of the products is shown by various important derivatisation reactions. Subsequently, the 4-membered azetidine products, synthesised by N–H insertion and cyclisation, are ring expanded to 6-membered 1,3-oxazinan-2-one products. Through exploration of the scope and mechanism of this 4- to 6-membered ring expansion a new methodology is developed for generating new leads for drug discovery. Finally, the N–H insertion of diazo compounds is coupled with a new enantioselective cyclisation reaction to synthesise enantioenriched spiroazetidines. This cyclisation step makes use of a new asymmetric phase transfer catalyst to achieve high er. A range of spiroazetidines are synthesised and the mechanism of the asymmetric phase transfer catalysis is discussed. A summary of specific conclusions and future work can be found at the end of each chapter. The final section provides experimental details.
Relativistic electron wave packets carrying angular momentum
Creators: name: Bialynicki-Birula, Iwo
name: Bialynicka-Birula, Zofia
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: There are important differences between the nonrelativistic and relativistic description of electron beams. The orbital angular momentum quantum number cannot be used to specify the wave functions in the relativistic case. In this Letter we introduce analytic solutions of the Dirac equation in the form of exponential wave packets and we argue that they properly describe relativistic electron beams carrying angular momentum.
description: Editors' Suggestion Commented on in Viewpoint
Leptogenesis from Oscillations of Heavy Neutrinos with Large Mixing Angles
Creators: name: Drewes, Marco
name: Garbrecht, Bjorn
name: Gueter, Dario
name: Klaric, Juraj
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The extension of the Standard Model by heavy right-handed neutrinos can simultaneously explain the observed neutrino masses via the seesaw mechanism and the baryon asymmetry of the Universe via leptogenesis. If the mass of the heavy neutrinos is below the electroweak scale, they may be found at the LHC, BELLE II, NA62, the proposed SHiP experiment or a future high-energy collider. In this mass range, the baryon asymmetry is generated via CP-violating oscillations of the heavy neutrinos during their production. We study the generation of the baryon asymmetry of the Universe in this scenario from first principles of non-equilibrium quantum field theory,including spectator processes and feedback effects. We eliminate several uncertainties from previous calculations and find that the baryon asymmetry of the Universe can be explained with larger heavy neutrino mixing angles, increasing the chance for an experimental discovery. For the limiting cases of fast and strongly overdamped oscillations of right-handed neutrinos, the generation of the baryon asymmetry can be calculated analytically up to corrections of order one.
description: 35 pages plus appendix, 11 figures: Matches version published in JHEP
On the Stability of Kalman-Bucy Diffusion Processes
Creators: name: Bishop, Adrian N.
name: Del Moral, Pierre
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optimization and Control (math.OC)
subject: Probability (math.PR)
subject: FOS: Mathematics

description: The Kalman-Bucy filter is the optimal state estimator for an Ornstein-Uhlenbeck diffusion given that the system is partially observed via a linear diffusion-type (noisy) sensor. Under Gaussian assumptions, it provides a finite-dimensional exact implementation of the optimal Bayes filter. It is generally the only such finite-dimensional exact instance of the Bayes filter for continuous state-space models. Consequently, this filter has been studied extensively in the literature since the seminal 1961 paper of Kalman and Bucy. The purpose of this work is to review, re-prove and refine existing results concerning the dynamical properties of the Kalman-Bucy filter so far as they pertain to filter stability and convergence. The associated differential matrix Riccati equation is a focal point of this study with a number of bounds, convergence, and eigenvalue inequalities rigorously proven. New results are also given in the form of exponential and comparison inequalities for both the filter and the Riccati flow.
description: Updated with corrections and some (minor) additions
Estructura de la metodología de costos basado en actividades para unidad funcional de cirugía de la IPS Maternidad Bocagrande Ltda
Creators: name: Torres Audivet, Cindy Carolina
name: Estrada Fernandez, José
Publisher: name: Universidad de Cartagena
Year: 2011
Subjects: Contabilidad de costos
Contabilidad - Centros hospitalarios

description: Tesis(Contador Publico).-Universidad de Cartagena. Facultad de Ciencias Económicas.Programa de Contaduría Publica,2011
description: El sector salud es altamente competitivo, lo que hace que tenga que ser muy eficiente para poder mantener una excelente calidad en la prestación de sus servicios y así permanecer en el mercado, demás que se encuentra regido por las entidades estatales que son financiadas con recursos públicos y están lejos de ser eficientes. Muy pocos hospitales y clínicas de la ciudad de Cartagena de Indias utilizan métodos adecuados que permitan determinar de forma razonable los costos en que se incurren desde que el cliente solicita el servicio hasta que se da de alta. Insumos, materiales, mano de obra, costos indirectos, y demás, son utilizados en la elaboración o producción de los artículos o servicios, pero muchas veces se desperdician debido a la precariedad de los controles que se tienen y al manejo innecesario que se les da. Todas estas falencias internas traen consigo el suministro de información errada, mala toma de decisiones, incremento de los costos y la posterior crisis en las empresas. Por lo anterior, es de vital importancia que la Unidad Funcional de Cirugía de la IPS Maternidad Bocagrande Ltda., cuente con mecanismos que permitan controlar de manera eficiente los costos de la prestación de servicios, debido a que los precios de venta son establecidos de acuerdo a normatividad, la cual no siempre se adapta a la realidad del mercado.
Structure, ferromagnetic, dielectric and electronic features of the LaBiFe2O6 material
Creators: name: Farfán, J. A. Cuervo
name: García, D. M. Aljure
name: Cardona, R.
name: Rodríguez, J. Arbey
name: Téllez, D. A. Landínez
name: Roa-Rojas, J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In this paper the synthesis and study of the structural, morphological, electrical, magnetic and electronic properties of the LaBiFe2O6 novel material are reported. The material was produced using the standard ceramic method. The Rietveld analysis of experimental data of x-ray diffraction showed that it synthesizes in an orthorhombic perovskite structure (Pnma, #62 space group). Two types of grain, micro and submicrometric, with the LaBiFe2O6 stoichiometry were identified by scanning electron microscopy and X-ray dispersive spectroscopy. Results of electrical polarization and dielectric constant ferroelectric suggest the occurrence of response of the material at room temperature. A T=300 K the material is ferromagnetic and exhibits an anomaly at T=258 K, which is attributed to anisotropy effects, suggesting the occurrence of biferroic behaviour. Results of diffuse reflectance suggest a semiconductor behaviour with energy gap Eg=2,17 eV, which is in agreement with calculations of band structure and density of states for one spin orientation, while for the other spin configuration calculations suggest a conductor feature.
description: 18 pages, 14 figures, 4 tables
Weak degeneracy of planar graphs without 4- and 6-cycles
Creators: name: Wang, Tao
Publisher: name: arXiv
Year: 2023
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: A graph is $k$-degenerate if every subgraph $H$ has a vertex $v$ with $d_{H}(v) \leq k$. The class of degenerate graphs plays an important role in the graph coloring theory. Observed that every $k$-degenerate graph is $(k + 1)$-choosable and $(k + 1)$-DP-colorable. Bernshteyn and Lee defined a generalization of $k$-degenerate graphs, which is called \emph{weakly $k$-degenerate}. The weak degeneracy plus one is an upper bound for many graph coloring parameters, such as choice number, DP-chromatic number and DP-paint number. In this paper, we give two sufficient conditions for a plane graph without $4$- and $6$-cycles to be weakly $2$-degenerate, which implies that every such graph is $3$-DP-colorable and near-bipartite, where a graph is near-bipartite if its vertex set can be partitioned into an independent set and an acyclic set.
description: 13 pages
title: Proteins at interfaces
title: Protein adsorption studied by X-ray and neutron reflectometry
titleType: AlternativeTitle
Creators: name: Evers, Florian
Publisher: name: Technische Universität Dortmund
Year: 2011
Subjects: subject: Protein adsorption
subject: Surface functionalization
subject: X-ray reflectometry
subject: Neutron reflectometry
subject: Cosolvent
subject: Hofmeister effect
subject: Polymer brushes
subject: Self-assembled monolayers
subject: 530

description: Protein adsorption is a fundamental and ubiquitous phenomenon, which has severe implications in the fields of biomaterials as well as bio- and nanotechnology, e.g., in drug delivery, biofouling, the biocompatibility of implants, food chemistry, and biosensors. Therefore, the mechanisms of protein adsorption and controlling the interfacial affinity of proteins have become intriguing and interdisciplinary research topics. In this work, X-ray and neutron reflectometry are the main techniques applied to study protein adsorption. Thus, the interfacial structure of adsorbed protein films can be characterized in terms of film thickness, protein volume fraction inside the adsorbed layer, and adsorbed amount. The four main achievements of this thesis are summarized as follows: - In comprehensive studies, the potential of osmolytes to reduce protein adsorption has been revealed. For three functionally different model interfaces, it is shown that adding nonionic cosolvents to protein solutions leads to a decreased surface excess of proteins by lowering the protein packing density inside the adsorbed protein layer. Hence, these results provide a means to control the interfacial affinity of proteins. - Furthermore, the addition of ionic cosolvents to protein solutions alters attractive and repulsive electrostatic interactions between proteins and surfaces as well as between proteins inside the adsorbed layer. In the presence of NaCl, protein adsorption at hydrophobic surfaces can be increased, whereas the presence of kosmotropic and chaotropic salts leads to reduced protein adsorption. In particular, this study addresses Hofmeister effects on protein adsorption. - Polyelectrolyte brushes are an interesting tool to control non-specific protein adsorption. In this work, the properties of a poly(acrylic acid) brush in the presence of insulin are analyzed. It is shown that poly(acrylic acid) brushes can provide a biocompatible environment even for aggregation-prone peptides. - Moreover, the influence of surface chemistry and substrate composition on protein adsorption is analyzed. It is clearly shown that protein adsorption at hydrophobic surfaces can lead to drastic conformational changes of adsorbed proteins, and that van der Waals forces exert significant effects on protein adsorption.
Desarrollo de la cultura emprendedora en los estudiantes del Programa de Administración de Empresas de la Universidad de Cartagena
Creators: name: Ballestas Buelvas, Danilo José
name: Pérez De La Rosa, Yennifer Del Carmen
Publisher: name: Universidad de Cartagena
Year: 2016
Subjects: Emprendimiento Empresarial
Pensamiento creativo
Aptitud creadora
Educación superior

description: Tesis (Administrador de Empresas).--Universidad de Cartagena. Facultad de Ciencias Económicas. Programa de Administración de Empresas, 2016
description: La creación de empresas se muestra como alternativa para la disminución del desempleo y dinamización de la economía, por tal razón el desarrollo de una cultura emprendedora es de vital importancia para poder impactar en la economía global y nacional. Es por esto que el presente trabajo tiene como objetivo analizar el desarrollo de la cultura emprendedora en los estudiantes del programa de Administración de Empresas en la Universidad de Cartagena.
Bending-induced extension in two-dimensional crystals
Creators: name: Pan, Douxing
name: Li, Yao
name: Wang, Tzu-Chiang
name: Guo, Wanlin
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: According to the classical theory of elasticity, a plate subjected to a bending moment always deflects with symmetric tensile and compressive strains in its two sides, without overall deformation perpendicular to the bending moment. Here, we find by ab initio simulations that significant overall tensile strain can be induced by pure bending in a wide range of two-dimensional crystals perpendicular to the bending moment, just like an accordion being bent to open. This accordion effect is raised by asymmetric response of chemical bonds and electron density to the bending curvature, with the tensile strain being a power function of the curvature.
Determinants of Employees Job Satisfaction: The Case of Heineken Breweries S.C
Creators: name: Asfaw, Marco
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: The purpose of this study is to determine level of employees' job satisfaction and to identify factors affecting employees' job satisfaction. Factors that have an impact on job satisfaction include nature of job, pay and benefits, attitude towards supervisor, interpersonal relationship, career advancement, evaluation process and working condition. Random sampling was used for the sampling technique and 80 employees were selected from employees of Heineken Breweries S.C. Descriptive analysis was performed to determine level of employees' job satisfaction. In addition, regression analysis was utilized to empirically test the relationship between employees' job satisfaction and the factors. Findings suggest that employees are moderately satisfied with their job and there is significant relationship with interpersonal relationship, pay and benefits, evaluation process and working condition with employees' job satisfaction. Contrary to previous studies, a negative relationship of nature of job, attitude towards supervisor, and career advancement with job satisfaction was also found. To increase the level of employee's job satisfaction, possible recommendation of the research, are providing competitive benefits, giving rewards and recognitions, developing employees skills, creating positive work environment, engaging employees and tracing job satisfaction. Key Words: Job Satisfaction, HBSC
Superconductivity and magnetism in Iron Sulfides Intercalated by Metal Hydroxides
Creators: name: Zhou, Xiuquan
name: Eckberg, Christopher
name: Wilfong, Brandon
name: Liou, Sz-Chian
name: Vivanco, Hector K.
name: Paglione, Johnpierre
name: Rodriguez, Efrain E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Inspired by naturally occurring sulfide minerals, we present a new family of iron-based superconductors. A metastable form of FeS known as the mineral mackinawite forms two-dimensional sheets that can be readily intercalated by various cationic guest species. Under hydrothermal conditions using alkali metal hydroxides, we prepare three different cation and metal hydroxide-intercalated FeS phases including (Li$_{1-x}$Fe$_x$OH)FeS, [(Na$_{1-x}$Fe$_x$)(OH)$_2$]FeS, and K$_x$Fe$_{2-y}$S$_2$. Upon successful intercalation of the FeS layer, the superconducting critical temperature $T_c$ of mackinawite is enhanced from 5 K to 8 K for the (Li$_{1-x}$Fe$_x$OH)$^{δ+}$ intercalate. Layered heterostructures of [(Na$_{1-x}$Fe$_x$)(OH)$_2$]FeS resemble the natural mineral tochilinite, which contains an iron square lattice interleaved with a hexagonal hydroxide lattice. Whilst heterostructured [(Na$_{1-x}$Fe$_x$)(OH)$_2$]FeS displays long-range magnetic ordering near 15 K, K$_x$Fe$_{2-y}$S$_2$ displays short range antiferromagnetism.