cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Metodología de gestión integral del riesgo para la dirección de servicios electromecánica de la Empresa de Acueducto y Alcantarillado de Bogotá ESP
Creators: name: Minotta Peñaloza, Carlos Ivan
name: Peña Salinas, Néstor Iván
Publisher: name: Universidad Externado de Colombia
Year: 2022
Subjects: subject: Estaciones de bombeo
subject: Tecnologia electromecánica
subject: Riesgo - Derecho
subject: Metodología
subject: Riesgos
subject: Acueducto
subject: Mantenimiento electromecánico

description: El trabajo de grado tiene como objetivo establecer una metodología de gestión integral de riesgos para la Dirección de Mantenimiento Electromecánica (DME) de la Empresa de Acueducto y Alcantarillado de Bogotá (EAAB-ESP). La metodología se encuentra alineada con la norma ISO 31000 y la norma ISO 31010 y propone fases para su aplicación. Empieza con el establecimiento el contexto de la DME la cual se encarga de la operación y mantenimiento de todas las estaciones electromecánicas de la EAAB-ESP dentro de las cuales se encuentran: Estaciones de Bombeo, Estructuras de control de presión y caudal, Pequeñas Centrales Hidroeléctricas, Tanques de almacenamiento y Estaciones Elevadoras de Aguas Servidas. Se continúa con la fase de identificación de riesgos usando la técnica ¿Qué pasaría sí?, donde se analizan los eventos de riesgo (Consecuencia, evento, causa). La siguiente fase es realizar el análisis y valoración de los riesgos para la cual se establece una tabla de probabilidad y una tabla de impacto basadas en los 5 principales criterios definidos. La metodología continúa con la fase de evaluación tratamiento en la cual se toman acciones según criterios definidos. Finalmente, la metodología termina con el monitoreo y seguimiento de los riesgos.
description: The grade work has as objective to establish a methodology of integral administration of risks for the electromechanical maintenance management (DME) of the Company of Acuecucto and Alcantarillado of Bogotá (EAAB-ESP). The methodology is aligned with the norm ISO 31000 and the norm ISO 31010 and it proposes phases for its application. It begins with the establishment of the context of the DME, whose main purpose is the operation and maintenance of all the electromechanical stations of the EAAB-ESP and within which are: Pumping Stations, Pressure and Flow Control Structures, Small Hydroelectric Power Stations, Storage Tanks and Sewage Lifting Stations. It continues with the risk identification phase using the technique What would happen if? where risk events are analyzed (Consequence, event, cause). The next phase is to carry out the analysis and assessment of the risks for which a probability table and an impact table are established based on the 5 main criteria defined. The methodology continues with the treatment evaluation phase in which actions are taken according to defined criteria. Finally, the methodology ends with the monitoring and follow-up of risks.
Quantum states resembling classical periodic trajectories in mesoscopic elliptic billiards
Creators: name: Riestra, Jesus G.
name: Gutierrez-Vega, Julio C.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Dynamical Systems (math.DS)
subject: Classical Physics (physics.class-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: A quantum wave function with localization on classical periodic orbits in a mesoscopic elliptic billiard has been achieved by appropriately superposing nearly degenerate eigenstates expressed as products of Mathieu functions. We analyze and discuss the rotational and librational regimes of motion in the elliptic billiard. Simplified line equations corresponding to the classical trajectories can be extracted from the quantum state as an integral equation involving angular Mathieu functions. The phase factors appearing in the integrals are connected to the classical initial positions and velocity components. We analyze the probability current density, the phase maps, and the vortex distributions of the periodic orbit quantum states for both rotational and librational motions; furthermore, they may represent traveling and standing trajectories inside the elliptic billiard.
description: 12 pages, 12 figures
Energieflexibilität in der deutschen Industrie
Creators: name: Sauer, Alexander (Ed.)
name: Buhl, Hans Ulrich (Ed.)
name: Mitsos, Alexander (Ed.)
name: Weigold, Matthias (Ed.)
Publisher: name: Fraunhofer-Gesellschaft
Year: 2021
Subjects: Energieflexibilität
Energiewende
Netzstabilisierung
Industrieprozesse
Flexibilitätspotenziale
Energieflexible Fabrik

description: Energie aus erneuerbaren Ressourcen ist nicht immer beliebig verfügbar. Je nach Jahreszeit und Witterung variiert beispielsweise die durch Photovoltaik oder Windkraft zur Verfügung gestellte Leistung. Durch den kontinuierlichen Ausbau der erneuerbaren Energien wird sich die Volatilität im Energiesystem in Zukunft immer stärker ausprägen. Die Industrie auf die sich ändernden Versorgungsstrukturen vorzubereiten und anzupassen ist eine große Herausforderung der nächsten Jahrzehnte. Unternehmen müssen zukünftig ihre Prozesse und Betriebsorganisation so gestalten können, dass sich der Energieverbrauch zumindest in Teilen flexibel an das volatile Energieangebot anpassen kann – ein Paradigmenwechsel weg vom kontinuierlichen und rein nachfraggetriebenen Energieverbrauch hin zum anpassbaren, energieflexiblen Betrieb. Neben der Entwicklung von Technologien, Konzepten und Maßnahmen zur energetischen Flexibilisierung von industriellen Prozessen liegt ein zweiter Schwerpunkt zukünftiger Arbeiten auf der Entwicklung einer durchgängigen IT-Infrastruktur, mit der Unternehmen und Energieanbieter in Zukunft Energieflexibilität bestmöglich einsetzen können. Dieses Nachschlagewerk zeigt die Herausforderungen und Rahmenbedingungen von energieflexiblen Fabriken sowie Managementsysteme und Technologien für deren Realisierung. Es baut auf den wichtigsten Ergebnissen der Forschung im Rahmen der zweiten Phase des Kopernikus-Projekts SynErgie auf.
Le droit d'auteur : ce que vous devez savoir
Creators: name: Brunet, Mélanie
name: Mollel, Obianuju
Publisher: name: My University
Year: 2019
Subjects: Droit d'auteur

description: Atelier de formation continue offert à la Conférence de l'Association des bibliothèques de la santé du Canada, 4 juin 2019. Comprend les diapositives de la présentation, un quiz, une feuille de route pour l'analyse de scénarios et une liste de ressources pour en savoir plus. Aussi disponible en anglais sous le titre "Copyright Aware: What You Need to Know".
Frame- and Metric-like Higher-Spin Fermions
Creators: name: Rahman, Rakibur
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Conventional descriptions of higher-spin fermionic gauge fields appear in two varieties: the Aragone-Deser-Vasiliev frame-like formulation and the Fang-Fronsdal metric-like formulation. We review, clarify and elaborate on some essential features of these two. For frame-like free fermions in Anti-de Sitter space, one can present a gauge-invariant Lagrangian description such that the constraints on the field and the gauge parameters mimic their flat-space counterparts. This simplifies the explicit demonstration of the equivalence of the two formulations at the free level. We comment on the subtleties that may arise in an interacting theory.
description: 19 pages, published in the special issue "Higher Spin Gauge Theories" of Universe
Diurnal patterns of micropollutants concentrations in domestic greywater
Creators: name: Alfiya, Yuval
name: Dubowski, Yael
name: Friedler, Eran
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Biochemistry
subject: Genetics
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified

description: In recent years, much interest has been given to presence of micropollutants in municipal wastewater, some of which are suspected to be endocrine disruptors, toxic or carcinogenic. Much less attention has been paid to their presence in greywater. The present research studies the diurnal patterns of micropollutants in greywater and computes their daily loads. Monitoring was carried-out using auto-controlled sampling system, designed to overcome the erratic greywater generation. Two main generation periods were identified: morning (5:00–11:00) and evening-night (18:00–2:00), contributing about 20% and >50% of daily greywater discharge, respectively. Average specific daily greywater discharge was 57 L p−1d−1, which matches reported value for greywater generated by showers and washbasins in Israel. The most frequently detected micropollutants in this study were methylparben (preservative), galaxolide (fragrance) and oxybenzone (UV-filter), which are common ingredients in many personal care-products. Their daily loads were 2, 840, 1, 887 and 728 µg p−1d−1, respectively.
Estudio comparativo de los cambios alimenticios del Pueblo Misak – Guambianos de Silvia – Cauca a través de tres períodos de tiempo (antes de los años 1950, desde los años 1951 hasta 1990 y desde los años 1991 hasta el año 2015
Creators: name: Tróchez Calambás, Elizabeth
Publisher: name: Universidad Externado de Colombia
Year: 2022
Subjects: subject: Dieta
subject: Acción cultural
subject: Indígenas
subject: Dieta nutricional
subject: Dependencia alimentaria
subject: Salud y enfermedad
subject: Entorno sociocultural
subject: Yatul - huerta

description: En el presente trabajo se estudia el cambio generacional en el Pueblo Misak, a partir de la selección de cuatro categorías relevantes para su análisis: dieta nutricional, dependencia alimentaria, salud y enfermedad, y entorno sociocultural. La investigación combinó técnicas de investigación de carácter cuantitativo (encuesta) y de carácter cualitativo (entrevista). Dentro de los principales resultados, se lograron establecer distintos tipos de cambios socio culturales con respecto a los patrones alimenticios y de salud que han acompañado al Pueblo Misak.
description: This work studies the generational change in the Misak People, based on the selection of four relevant categories for analysis: nutritional diet, food dependence, health and illness, and sociocultural environment. The research combined quantitative (survey) and qualitative (interview) research techniques. Among the main results, it was possible to establish different types of socio-cultural changes with respect to eating and health patterns that have accompanied the Misak People.
KI-basierte Fehleranalyse für die Instandhaltung erneuerbarer Erzeugung
Creators: name: Rajendran, Ajay
name: Kobialka, Hans-Ulrich
name: :Unav
Publisher: name: Fraunhofer-Gesellschaft
Year: 2023
Subjects: Modular gripper
Human robot collaboration
Value sensitive design
SMEs

description: Mit der Dekarbonisierung der Energielandschaft ändert sich auch die Struktur der Anlagenparks. Der Anteil kleinerer dezentraler Anlagen, die nur remote gesteuert werden, nimmt zu. Damit ergeben sich auch neue Herausforderungen für die O&M-Strategie. Eine konventionelle Anlage mit einigen hundert MW installierter Leistung hat 2000-3000 Messwerte, die Informationen über den Zustand der Anlage und ihrer Komponenten beinhalten und die Hinweise auf Verschleiß und mögliche Störungen geben können. Eine Photovoltaik-Anlage mit 3MWp hat oft ebenfalls 3000 Messungen. Ein PV-Portfolio mit einigen hundert MWp erzeugt also alle 5 min oder 10 min eine Flut von Messwerten in der Größenordnung von einer Million Werte. Die Überwachung dieses Portfolios muss in der Regel remote durch ein kleines Team ohne permanente Präsenz vor Ort erfolgen. Softwarelösungen, die 24/7 im Onlinebetrieb Messwerte überwachen und frühzeitig und belastbar Veränderungen im Anlagenverhalten erkennen, tragen schon bei der Betriebsführung konventioneller Anlagen zur Effizienzsteigerung und Reduktion der Instandhaltungskosten bei. In einer erneuerbaren, stärker dezentralen, dekarbonisierten Erzeugungslandschaft wird die Bedeutung dieser Werkzeuge wegen der Messwertflut weiter zunehmen. Iqony und das Fraunhofer Institut IAIS haben daher Werkzeuge entwickelt, um Betriebsführung und Instandhaltung von erneuerbaren Anlagen mit Methoden der künstlichen Intelligenz zu unterstützen. Dabei wurden sowohl Verfahren, die im Kontext konventioneller Erzeugung bekannt sind, auf die Anforderungen erneuerbarer Erzeugung übertragen als auch neue Ansätze erarbeitet.
Detecting defect dynamics in relativistic field theories far from equilibrium using topological data analysis
Creators: name: Noel, Viktoria
name: Spitz, Daniel
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We study nonequilibrium dynamics of relativistic $N$-component scalar field theories in Minkowski space-time in a classical-statistical regime, where typical occupation numbers of modes are much larger than unity. In this strongly correlated system far from equilibrium, the role of different phenomena such as nonlinear wave propagation and defect dynamics remains to be clarified. We employ persistent homology to infer topological features of the nonequilibrium many-body system for different numbers of field components $N$ via a hierarchy of cubical complexes. Specifically, we show that the persistent homology of local energy density fluctuations can give rise to signatures of self-similar scaling associated with topological defects, distinct from the scaling behaviour of nonlinear wave modes. This contributes to the systematic understanding of the role of topological defects for far-from-equilibrium time evolutions of nonlinear many-body systems.
description: 17 pages, 9 figures
Additional file 1 of Incidence, casualties and risk characteristics of civilian explosion blast injury in China: 2000—2017 data from the state Administration of Work Safety
Creators: name: Wang, Xu
name: Du, Juan
name: Zhuang, Zhuo
name: Wang, Zheng-Guo
name: Jiang, Jian-Xin
name: Yang, Ce
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Developmental Biology
subject: Cancer
subject: Plant Biology

description: Additional file 1: Table S1. Casualty by explosion accidents grade [n(%)].
The Navier wall law at a boundary with random roughness
Creators: name: Gerard-Varet, David
Publisher: name: arXiv
Year: 2007
Subjects: subject: Analysis of PDEs (math.AP)
subject: Classical Physics (physics.class-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We consider the Navier-Stokes equation in a domain with irregular boundaries. The irregularity is modeled by a spatially homogeneous random process, with typical size $\eps \ll 1$. In a parent paper, we derived a homogenized boundary condition of Navier type as $\eps \to 0$. We show here that for a large class of boundaries, this Navier condition provides a $O(\eps^{3/2} |\ln \eps|^{1/2})$ approximation in $L^2$, instead of $O(\eps^{3/2})$ for periodic irregularities. Our result relies on the study of an auxiliary boundary layer system. Decay properties of this boundary layer are deduced from a central limit theorem for dependent variables.
Probing Dark Energy in The scope of Bianchi type I Spacetime
Creators: name: Amirhashchi, Hassan
Publisher: name: arXiv
Year: 2017
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: It is well known that flat FRW metric is a special case of Bianchi type I spacetime. In this paper, we use 38 Hubble parameter, $H(z)$, measurements at intermediate redshifts $0.07\leq z\leq 2.36$ and its joint combination with the latest \textgravedbl joint light curves\textacutedbl (JLA) sample, comprised of 740 type Ia supernovae in the redshift range $z ε[0.01, 1.30]$ to constrain the parameters of Bianchi type I dark energy model. We also use the same datasets to constrain flat $Λ$CDM Model. In both cases, we specifically address the expansion rate $H_{0}$ as well as the transition redshift $z_{t}$ determinations out of these measurements. In both Models we found that using joint combination of datasets gives rise to lower values for model parameters. Also to compare the considered cosmologies, we have made Akaike information criterion (AIC) and Bayes factor ($Ψ$) tests.
description: 11 pages, 9 figures, 4 tables
title: Konzeption einer Pilotanlage auf Grundlage einer technoökonomischen Bewertung von flexiblen Polygenerationsprozessketten
Creators: name: Heinze, Christian
Publisher: name: UNSPECIFIED
Year: 2021

description: Die Weltgemeinschaft hat sich mit dem Pariser Klimaabkommen von 2015 verpflichtet, die Klimaerwärmung gegenüber dem vorindustriellen Zeitalter auf maximal 2 °C zu begrenzen. Es gilt die anthropogenen Treibhausgasemissionen sektorübergreifend zu reduzieren. Im Energiesektor in Deutschland erfolgt hierfür vorrangig der Ausbau von Windkraft- und Photovoltaikanlagen, welcher wiederum die Nachfrage nach flexibler Stromerzeugung und -speicherung erhöht. Der Industriesektor steht dagegen vor der Herausforderung, sich von einer linearen Kohlenstoffwirtschaft auf Grundlage von fossilen Grundstoffen zu einer Kreislaufwirtschaft weiterzuentwickeln. Ein vielversprechendes Konzept stellt das Polygenerationskonzept auf Basis der Wirbelschichtvergasung dar. Es erlaubt sowohl eine CO₂-arme Stromproduktion als auch die Bereitstellung von Grundstoffen für die chemische Industrie aus fossilen Rohstoffen und biogenen sowie anthropogenen Ressourcen. In der vorliegenden Arbeit wird die Konzeption einer Pilotanlage als Erweiterung eines bestehenden 500 kWth Pilotvergasers an der Technischen Universität Darmstadt zur Unter-suchung der technischen und wissenschaftlichen Fragestellungen für eine Kommerzialisierung des Polygenerationskonzepts dargestellt. Dies erfolgt basierend auf einer Modellierung der Prozesskette bestehend aus Dampfwirbelschichttrocknung, Wirbelschichtvergasung, katalytischen Konvertierungsstufen, verschiedener Trennverfahren zur Gasreinigung, Stromerzeugung sowie der Synthese von Methanol als chemischer Grundstoff. Mittels techno-ökonomischer Bewertung werden zu erwartende Betriebspunkte und Lasttransienten in kommerziellen Anlagen ermittelt und hieraus die offenen Forschungsfragen abgeleitet. Es wurden mehr als 200 Betriebsstunden im Pilotvergaser mit verschiedenen Einsatzstoffen zur Validierung der Auslegungsbedingungen absolviert. Dabei wurden Kaltgaswirkungsgrade bis 65 % und Kohlenstoffumsätze bis 95 % erreicht. Die technoökonomische Analyse zeigte, dass in einer kommerziellen Polygenerationsanlage bereits ohne Verwendung von Elektrolysewasserstoff bis zu 58 % des Kohlenstoffs im Produkt gebunden wird. Die ermittelten Produktgestehungskosten liegen mit 145 €/MWh für Strom und 540 €/t für Rohmethanol über dem derzeitigen Marktpreis. In Zukunft sind jedoch steigende CO₂-Zertifikat- und volatilere Strompreise zu erwarten. In diesem Marktumfeld wäre das untersuchte Konzept wirtschaftlich zu betreiben. Die konzipierte und derzeit in der Inbetriebnahme befindliche Pilotanlage enthält alle kritischen Prozessschritte der Gasreinigung. Als drängendste Forschungsfragen wurden die Lastwechselfähigkeit der Kolonnen und Reaktoren sowie die Validierung von Technologien zur Teerabscheidung identifiziert.
La unidad política en Carl Schmitt y en Rudolf Smend
Creators: name: Camacho Corzo, Pedro David
Publisher: name: Universidad Externado de Colombia
Year: 2023
Subjects: subject: Actitudes políticas
subject: Elecciones
subject: Colombia - Constitución
subject: Unidad política
subject: Liberalismo político
subject: Integración
subject: Constitución

description: El propósito de este artículo es caracterizar el concepto de unidad política en Carl Schmitt y en Rudolf Smend, para luego demostrar por qué, en el contexto de la República de Weimar, estos dos autores tenían más puntos en contra que en común al abordar este tópico. Las diferencias a las que se hará referencia se encuentran inescindiblemente ligadas a la forma en la que cada autor concebía la propuesta política del liberalismo. Luego de estudiar las ideas de ambos, en lo relativo a la forma en que pensaban la unidad política y a su propuesta de constitucionalismo, se pretenderá sostener que el marcado carácter antiliberal que Schmitt expone en sus obras, no se recoge en las ideas de Smend, pues, a este último no se le puede enrostrar -sin más- el título de jurista antiliberal. Para lo anterior, será necesario (i) estudiar las categorías fundamentales que ambos autores usaron en el desarrollo de sus tesis, en lo relacionado con la unidad política y (ii) comparar sus planteamientos sobre el particular. Los elementos que se retomen en este debate pueden iluminar los debates contemporáneos sobre la funcionalidad del liberalismo político.
description: The purpose of this article is to characterize the concept of political unity in Carl Schmitt and Rudolf Smend, to then demonstrate why, in the context of the Weimar Republic, these two authors had more points against than in common when addressing this topic. The differences to which reference will be made are inextricably linked to the way in which each author conceived the political proposal of liberalism. After studying the ideas of both, in relation to the way in which they thought about political unity and their proposal for constitutionalism, it will be argued that the marked anti-liberal character that Schmitt exposes in his works is not included in the ideas of Smend, Well, the latter cannot be accused - without more - the title of anti-liberal jurist. For the above, it will be necessary (i) to study the fundamental categories that both authors used in the development of their theses, in relation to political unity and (ii) to compare their approaches on the matter. The elements that are taken up in this debate can illuminate contemporary debates on the functionality of political liberalism.
El agua y la producción del hidrógeno desde una perspectiva ambiental
Creators: name: Tejado Gallegos, Mariana
Publisher: name: Universidad Externado de Colombia
Year: 2023
Subjects: subject: Hidrógeno - Aspectos jurídicos
subject: Recursos hídricos - Aspectos jurídicos
subject: Cambios climáticos
subject: Desarrollo sostenible - Aspectos jurídicos
subject: Hidrógeno verde
subject: Agua
subject: Impactos ambientales
subject: Recursos naturales
subject: Desarrollo sustentable
subject: Descarbonización
subject: Transición energética

description: En el presente artículo, se realiza un análisis con aspectos jurídicos y técnicos, relativos a la utilización del denominado “hidrógeno verde”, el cual está siendo impulsado como un vector clave en la transición energética mundial. Se inicia el mismo desarrollando diversos aspectos técnicos para su obtención, haciendo énfasis en que el insumo primordial es el “agua”. Por otra parte, se realiza una revisión general de los avances que se han tenido en México respecto a su regulación y puesta en marcha. Se destina un capítulo al estudio de dos de los principales temas ambientales que están vinculados a la producción de este tipo de hidrógeno: (i) el primero, relacionado con los problemas de utilización del recurso hídrico en zonas donde actualmente hay escasez; y, (ii) el segundo, conectado con los posibles impactos indirectos que agravarían las consecuencias del fenómeno del cambio climático. Finalmente, se resalta la necesitada de realizar más estudios científicos al respecto y aplicar el principio precautorio, para así poder emitir los marcos normativos que permitan prevenir afectaciones ambientales y sociales. Lo anterior, ayudará además a impulsar la protección de los derechos humanos.
description: In this article, an analysis is carried out with legal and technical aspects, related to the use of the so-called "green hydrogen", which is being promoted as a key vector in the global energy transition. It begins by developing various technical aspects to obtain it, emphasizing that the primary feedstock is "water". On the other hand, a general review of the progress that has been made in Mexico regarding its regulation and implementation is carried out. A chapter is dedicated to the study of two of the main environmental issues that are linked to the production of this type of hydrogen: (i) the first, related to the problems of using water resources in areas where there is currently a shortage; and, (ii) the second, connected with the possible indirect impacts that would aggravate the consequences of the climate change phenomenon. Finally, the need to carry out more scientific studies in this regard and apply the precautionary principle is highlighted, in order to issue the regulatory frameworks that will prevent environmental and social damages. This will also help promote the protection of human rights.
Environmental damage - Nicotine balance of cigarettes (tobacco burners) when smoking
Creators: name: Eyerer, Peter
name: Gayh, Ulrike
name: Reichert, Thomas
name: Seidel, Claudia
name: :Unav
Publisher: name: Fraunhofer-Gesellschaft
Year: 2024

description: Illegally disposed cigarette butts cause enormous environmental damage [1,2,3]! Of the over 6 trillion cigarettes smoked worldwide each year, smokers throw around 4 trillion into the countryside. Toxicity [4,5] and microplastics [6] are of gigantic consequences for plants, animals and humans, not including the personal damage [7] caused by active and passive smokers. The environmental hazard of passive smoking (UFP PM2.5) is very high [8,9]. Of the approximately 12,000 different chemicals
Solutions of the Lippmann-Schwinger equation for confocal parabolic billiards
Creators: name: Ruiz-Biestro, Alberto
name: Gutierrez-Vega, Julio C.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Computational Physics (physics.comp-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present analytical and numerical solutions of the Lippmann-Schwinger equation for the scattered wavefunctions generated by confocal parabolic billiards and parabolic segments with various $δ$-type potential-strength functions. The analytical expressions are expressed as summations of products of parabolic cylinder functions $D_m$. We numerically investigate the resonances and tunneling in the confocal parabolic billiards by employing an accurate boundary wall method that provides a complete inside-outside picture. The criterion for discretizing the parabolic sides of the billiard is explained in detail. We discuss the phenomenon of transparency at certain eigenenergies.
description: 16 pages, 14 figures
ONLY AS GOOD AS THE PEOPLE UNDER HIM
Creators: name: Wilkin, Stanley
Publisher: name: figshare
Year: 2018
Subjects: subject: 210305 British History
subject: FOS: History and archaeology
subject: History
subject: 220207 History and Philosophy of the Humanities
subject: FOS: Philosophy, ethics and religion
subject: 220208 History and Philosophy of the Social Sciences
subject: 220209 History of Ideas

description: An exploration of the generalship of Napoleon, attempting to understand through leadership and follower management ideas. Was he a great general? Maybe.
Conectar desde la voz : correlatos neurofisiológicos de la prosodia, la empatía y las emociones básicas en adultos hispanohablantes
Creators: name: Peña Ríos, Aris Yupanqui
Publisher: name: Universidad Externado de Colombia
Year: 2023
Subjects: subject: Relaciones sociales
subject: Inteligencia emocional
subject: Empatia
subject: Prosodia
subject: Empatía
subject: Emociones
subject: Banda Mu

description: Las relaciones sociales, en cualquier contexto, son posibles gracias a la comunicación que se entabla entre dos o más sujetos y su nivel de efectividad y coherencia incide en la manera en que las personas asumen sus distintos roles sociales. Al comunicarnos, transmitimos y recibimos información cuya interpretación es afectada de manera subjetiva de acuerdo con la respuesta o disposición emocional que dicha comunicación genera en nuestra actividad cognitiva. La naturaleza de esta actividad, de acuerdo con cada individuo, es lo que hace posible y a la vez enriquece la experiencia empática. Esta experiencia empática resultado de un proceso de mentalización y/o una resonancia afectiva, si bien puede concluir en actitudes de dominación social o agresión, podría por otro lado generar un “interés prosocial”. En este marco, el entendimiento de las correlaciones entre la prosodia y las emociones básicas podrían ser un conocimiento valioso para llegar a generar y, posiblemente, predecir relaciones sociales más efectivas en cualquier escenario de interacción. Esta investigación pretende poner la mirada sobre las posibles correlaciones entre el componente afectivo de la empatía, las emociones básicas y la prosodia con el propósito de aportar en el entendimiento de las relaciones sociales en cualquier contexto, siendo un foco particular de atención e inspiración para nosotros el ámbito organizacional y laboral.
description: Social relationships, in any context, are possible thanks to the communication that takes place between two or more subjects and its level of effectiveness and coherence affects the way in which people assume their different social roles. When communicating, we transmit and receive information whose interpretation is subjectively affected according to the emotional response or disposition that such communication generates in our cognitive activity. The nature of this activity, according to each individual, is what makes possible and at the same time enriches the empathic experience. This empathic experience resulting from a mentalization process and/or an affective resonance, although it may lead to attitudes of social domination or aggression, could on the other hand generate a "prosocial interest". In this framework, understanding the correlations between prosody and basic emotions could be valuable knowledge for generating and possibly predicting more effective social relationships in any interaction scenario. This research aims to look at the possible correlations between the affective component of empathy, basic emotions and prosody with the purpose of contributing to the understanding of social relationships in any context, being a particular focus of attention and inspiration for us the organizational and work environment.
Additional file 2 of Incidence, casualties and risk characteristics of civilian explosion blast injury in China: 2000—2017 data from the state Administration of Work Safety
Creators: name: Wang, Xu
name: Du, Juan
name: Zhuang, Zhuo
name: Wang, Zheng-Guo
name: Jiang, Jian-Xin
name: Yang, Ce
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Developmental Biology
subject: Cancer
subject: Plant Biology

description: Additional file 2: Table S2. Correlation analysis of explosion accidents and regional population and economy.
Preparation, characterization and use of new lignocellulose-based bio nanocomposite as a heterogeneous catalyst for sustainable synthesis of pyrimido benzazoles
Creators: name: Molaei, Shiva
name: Javanshir, Shahrzad
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Biochemistry
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences

description: A sustainable combinatorial synthesis of densely substituted pyrimido [1,2-b] benzazole derivatives in water under microwave irradiation was performed using a new lignocellulose-based bio nanocomposite (BNC) as heterogeneous catalyst. The lignocellulosic waste peanut shells (LCWPS) were turned into a value-added product, a new BNC PS/ZnO, which was prepared via in situ hydrothermal synthesis. The as-prepared BNC was characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy and X-ray diffraction spectrum. PS/ZnO has been successfully used in a sustainable catalytic method for the synthesis of pyrimido [1, 2-b] benzazole derivatives in water under microwave irradiation. The time of this reaction was significantly reduced. This catalytic system has a very high turnover number (TON ∼ 103) and turnover frequency (TOF ∼ 105 h−1). This paper presents the benefit of sustainable management of LCWPS, a bio-sourced polymeric carbohydrate for production of new nanocatalyst.
Redundant interferometric calibration as a complex optimization problem
Creators: name: Grobler, T. L.
name: Bernardi, G.
name: Kenyon, J. S.
name: Parsons, A. R.
name: Smirnov, O. M.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Observations of the redshifted 21-cm line from the epoch of reionization have recently motivated the construction of low frequency radio arrays with highly redundant configurations. These configurations provide an alternative calibration strategy - "redundant calibration" - and boosts sensitivity on specific spatial scales. In this paper, we formulate calibration of redundant interferometric arrays as a complex optimization problem. We solve this optimization problem via the Levenberg-Marquardt algorithm. This calibration approach is more robust to initial conditions than current algorithms and, by leveraging an approximate matrix inversion, allows for further optimization and an efficient implementation ("redundant StEfCal"). We also investigated using the preconditioned conjugate gradient method as an alternative to the approximate matrix inverse, but found that its computational performance is not competitive with respect to "redundant StEfCal". The efficient implementation of this new algorithm is made publicly available.
description: 11 pages, 7 figures, MNRAS accepted
Resonant Inverse Compton Scattering Spectra from Highly-magnetized Neutron Stars
Creators: name: Wadiasingh, Zorawar
name: Baring, Matthew G.
name: Gonthier, Peter L.
name: Harding, Alice K.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Hard, non-thermal, persistent pulsed X-ray emission extending between 10 keV and $\sim 150$ keV has been observed in nearly ten magnetars. For inner-magnetospheric models of such emission, resonant inverse Compton scattering of soft thermal photons by ultra-relativistic charges is the most efficient production mechanism. We present angle-dependent upscattering spectra and pulsed intensity maps for uncooled, relativistic electrons injected in inner regions of magnetar magnetospheres, calculated using collisional integrals over field loops. Our computations employ a new formulation of the QED Compton scattering cross section in strong magnetic fields that is physically correct for treating important spin-dependent effects in the cyclotron resonance, thereby producing correct photon spectra. The spectral cut-off energies are sensitive to the choices of observer viewing geometry, electron Lorentz factor, and scattering kinematics. We find that electrons with energies $\lesssim 15$ MeV will emit most of their radiation below 250 keV, consistent with inferred turnovers for magnetar hard X-ray tails. More energetic electrons still emit mostly below 1 MeV, except for viewing perspectives sampling field line tangents. Pulse profiles may be singly- or doubly-peaked dependent upon viewing geometry, emission locale, and observed energy band. Magnetic pair production and photon splitting will attenuate spectra to hard X-ray energies, suppressing signals in the Fermi-LAT band. The resonant Compton spectra are strongly polarized, suggesting that hard X-ray polarimetry instruments such as X-Calibur, or a future Compton telescope, can prove central to constraining model geometry and physics.
description: 43 pages, 12 figures; accepted for publication in ApJ; v3 fixes typos and updates some references
BPS Kerr-AdS Time Machines
Creators: name: Cvetic, M.
name: Geng, Wei-Jian
name: Lu, H.
name: Pope, C. N.
Publisher: name: arXiv
Year: 2018
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It was recently observed that Kerr-AdS metrics with negative mass describe smooth spacetimes that have a region with naked closed time-like curves, bounded by a velocity of light surface. Such spacetimes are sometimes known as time machines. In this paper we study the BPS limit of these metrics, and find that the mass and angular momenta become discretised. The completeness of the spacetime also requires that the time coordinate be periodic, with precisely the same period as that which arises for the global AdS in which the time machine spacetime is immersed. For the case of equal angular momenta in odd dimensions, we construct the Killing spinors explicitly, and show they are consistent with the global structure. Thus in examples where the solution can be embedded in a gauged supergravity theory, they will be supersymmetric. We also compare the global structure of the BPS AdS$_3$ time machine with the BTZ black hole, and show that the global structure allows to have two different supersymmetric limits.
description: latex, 29 pages, minor typos corrected and references added
El cambio de percepción en las Fuerzas Militares de Colombia frente a las relaciones colombo-venezolanas en materia de seguridad (1999-2018) : una amenaza creciente
Creators: name: Suárez Castillo, Luis Jesús
Publisher: name: Universidad Externado de Colombia
Year: 2020
Subjects: subject: Comunismo
subject: Liderazgo
subject: Fuerzas armadas
subject: Colombia-Venezuela
subject: Fuerzas militares
subject: Percepción militar
subject: Seguridad y defensa
subject: Gobierno Chávez

description: La presente investigación examina las relaciones colombo-venezolanas, con énfasis en el cambio de la percepción militar frente a Venezuela. Para ello, se determinaron históricamente los principales hitos en el desarrollo político de sus relaciones desde 1941, cuando se definen los límites terrestres y de navegación fluvial entre los dos países; se explica la metamorfosis de la amenaza mediante la construcción del liderazgo de Venezuela en la región; se identifican las diferencias y similitudes entre las Fuerzas Militares de Colombia y la Fuerza Armada Nacional Bolivariana, en el contexto binacional, y con las Fuerzas Armadas de Brasil y Chile; finalmente, se presentan los resultados del análisis realizado. Las conclusiones señalan que la percepción de las FFMM colombianas, frente a Venezuela, ha variado desde 1999, como producto del cambio de enfoque que era determinado por el diferendo limítrofe. Esto es, hacia hechos políticos e ideológicos, articulados y afines a la naturaleza del conflicto interno, asociados a la revolución bolivariana Socialismo del Siglo XXI, iniciada con Hugo Chávez y continuada por Nicolás Maduro. De ahí que, pese al declive del liderazgo venezolano, la percepción militar de amenaza a la seguridad nacional de Colombia no desapareció, sino que se mantiene y aumenta en intensidad.
description: This research examines Colombian-Venezuelan relations, with emphasis on the change in military perception towards Venezuela. For this, the main milestones in the political development of their relations since 1941 were historically determined, when the land and river navigation limits between the two countries were defined; the metamorphosis of the threat is explained through the construction of Venezuela's leadership in the region; the differences and similarities between the Colombian Military Forces and the Bolivarian National Armed Forces are identified, in the binational context, and with the Armed Forces of Brazil and Chile; Finally, the results of the analysis carried out are presented. The conclusions indicate that the perception of the Colombian armed forces, compared to Venezuela, has varied since 1999, as a result of the change of focus that was determined by the border dispute. That is, towards political and ideological facts, articulated and related to the nature of the internal conflict, associated with the Bolivarian revolution Socialism of the XXI Century, started with Hugo Chávez and continued by Nicolás Maduro. Hence, despite the decline of the Venezuelan leadership, the military perception of a threat to Colombia's national security did not disappear, but rather it is maintained and is increasing in intensity.
Lorentz invariance violation and the CPT-odd electromagnetic response of a tilted anisotropic Weyl semimetal
Creators: name: Gómez, Andrés
name: von Dossow, R. Martínez
name: Martín-Ruiz, A.
name: Urrutia, Luis F.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We derive the electromagnetic response of a particular fermionic sector in the minimal QED contribution to the Standard Model Extension (SME), which can be physically realized in terms of a model describing a tilted and anisotropic Weyl semimetal (WSM). The contact is made through the identification of the Dirac-like Hamiltonian resulting from the SME with that corresponding to the WSM in the linearized tight-binding approximation. We first calculate the effective action by computing the non-perturbative vacuum polarization tensor using thermal field theory techniques, focusing upon the corrections at finite chemical potential and zero temperature. Next, we confirm our results by a direct calculation of the anomalous Hall current within a chiral kinetic theory approach.
 In an ideal Dirac cone picture of the WSM (isotropic and non-tilted) such response is known to be governed by axion electrodynamics, with the space-time dependent axion angle $Θ(\mathbf{r},t) = 2 (\mathbf{b} \cdot \mathbf{r} - b _{0} t)$, being $2 \mathbf{b}$ and $2b _{0}$ the separation of the Weyl nodes in momentum and energy, respectively. In this paper we demonstrate that the node tilting and the anisotropies induce novel corrections at a finite density which however preserve the structure of the axionic field theory. We apply our results to the ideal Weyl semimetal $\mathrm{EuCd}_{2}\mathrm{As}_{2}$ and to the highly anisotropic and tilted monopnictide $\mathrm{TaAs}$.
Interventions to Assist the Disarmament, Demobilization, & Reintegration of Former Child Soldiers in Sub-Saharan Africa: A Systematic Review
Creators: name: Campbell, Kirsten Emily Anne
Publisher: name: My University
Year: 2017

description: The prevalence of child soldiers remains a constant feature in many of today’s armed conflicts, specifically on the African continent. With the high prevalence of the use of children as soldiers in Sub-Saharan Africa, a major concern lies in how these child soldiers are to be assisted post-conflict, in transitioning from life as a member of an armed force or group, back to life as a regular civilian. This paper undertakes a systematic review of the evidence of thirteen studies based in five countries in Sub-Saharan Africa, studying the effectiveness of interventions undertaken to assist in the disarmament, demobilization, and reintegration (DDR) of former child soldiers returned from armed conflict. The literature commonly identifies four categories of interventions: psychosocial and psychiatric; creative-expressive; economic and educational; and community acceptance. Those categories of interventions that were reported to be the most effective include: economic and educational programming; elements of psychosocial and psychiatric interventions; and activities associated with community acceptance interventions. On the other hand, interventions that were reported to not be as effective included: certain elements of economic interventions; inadequate provision of economic and educational interventions; creative-expressive activities; and the improper use of certain elements of psychosocial interventions. Overall, the thirteen included studies in this systematic review indicate that there are many interventions to assist in the DDR of returned child soldiers that are generally effective in alleviating a variety of the multitude of ailments and issues faced by former child soldiers. However, it is clear that there is still not enough of a base of information to generalize a clear set of best practices for interventions that should be used in transitioning former child soldiers back to their previous lives.
Heat radiation and transfer for nanoparticles in the presence of a cylinder
Creators: name: Asheichyk, Kiryl
name: Krüger, Matthias
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study heat radiation and radiative heat transfer for nanoparticles in the presence of an infinitely long cylinder in different geometrical configurations, based on its electromagnetic Green's tensor. The heat radiation of a single particle can be enhanced by placing it close to a nanowire, and this enhancement can be much larger as compared to placing it close to a plate of the same material. The heat transfer along a cylinder decays much slower than through empty vacuum, being especially long-ranged in the case of a perfectly conducting nanowire, and showing nonmonotonic behavior in the case of a SiC cylinder. Exploring the dependence on the relative azimuthal angle of the nanoparticles, we find that the results are insensitive to small angles, but they can be drastically different when the angle is large, depending on the material. Finally, we demonstrate that a cylinder can either enhance or block the heat flux when placed perpendicular to the interparticle distance line, where the blocking in particular is strongly enhanced compared to the geometry of a sphere of same radius.
description: 17 pages, 8 figures. Changes compared to v1: the title is changed; Figs. 3 and 6 (and the corresponding discussions in the text) were added; Refs. [39] and [42] were added; minor updates for most of the figures; minor changes in the text
The Sun and its educational spectrum
Creators: name: Cardenas-Avendano, Alejandro
name: Dominguez, Santiago Vargas
name: Cardenas, Freddy Moreno
name: Calvo-Mozo, Benjamin
Publisher: name: arXiv
Year: 2017
Subjects: subject: Physics Education (physics.ed-ph)
subject: Popular Physics (physics.pop-ph)
subject: FOS: Physical sciences

description: The aim of this paper is to encourage science educators and outreach groups to look appropriately at the Sun and consider it as an extraordinary pedagogical tool to teach science at all education stages, what we call here as the solar educational spectrum, i.e., from K-12 to higher education, to develop informal educational projects that may lead to reach more complex material and to enlarge the experience at each stage. We review the main aspects of the Sun as an appetizer of the endless source of ideas to perform informal educational projects outside of a structured curriculum. We end up our discussion by sharing our experience across the educational spectrum in Colombia and how we used it as a development instrument.
description: 13 pages, 5 figures, comments Welcome. V2. Minor changes