cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Estudio de factibilidad para una planta de bioetanol a partir del aprovechamiento cascaras de plátano en la empresa Colombian Biofuel S.A.S.
Creators: name: Carriazo Guevara, Kimberly
name: Tarras García, Patricia Paola
Publisher: name: Universidad de Cartagena
Year: 2012
Subjects: Estudio de factibilidad
Estudio de mercado
Biocombustible

description: Tesis (Administrador Industrial).--Universidad de Cartagena. Facultad de Ciencias Económicas. Programa de Administración Industrial, 2012
description: En este informe se expone un proyecto de grado que tiene como objetivo estudiar la factibilidad de la instalación de una planta productora de bioetanol a partir de cáscaras de plátano en la empresa Colombian Biofuel S.A.S. analizando aspectos de mercado, técnico, financiero, ambiental, administrativo y legal que afectarían la puesta en marcha del mismo.
Convergence of the Euler-Maruyama method for multidimensional SDEs with discontinuous drift and degenerate diffusion coefficient
Creators: name: Leobacher, Gunther
name: Szölgyenyi, Michaela
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60H10, 65C30, 65C20 (Primary), 65L20 (Secondary)

description: We prove strong convergence of order $1/4-ε$ for arbitrarily small $ε>0$ of the Euler-Maruyama method for multidimensional stochastic differential equations (SDEs) with discontinuous drift and degenerate diffusion coefficient. The proof is based on estimating the difference between the Euler-Maruyama scheme and another numerical method, which is constructed by applying the Euler-Maruyama scheme to a transformation of the SDE we aim to solve.
Composite Operators in Asymptotic Safety
Creators: name: Pagani, Carlo
name: Reuter, Martin
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the role of composite operators in the Asymptotic Safety program for quantum gravity. By including in the effective average action an explicit dependence on new sources we are able to keep track of operators which do not belong to the exact theory space and/or are normally discarded in a truncation. Typical examples are geometric operators such as volumes, lengths, or geodesic distances. We show that this set-up allows to investigate the scaling properties of various interesting operators via a suitable exact renormalization group equation. We test our framework in several settings, including Quantum Einstein Gravity, the conformally reduced Einstein-Hilbert truncation, and two dimensional quantum gravity. Finally, we briefly argue that our construction paves the way to approach observables in the Asymptotic Safety program.
description: 38 pages
Assessment Of Project Management Maturity Level The Case Of International Orthodox Christian Charities
Creators: name: Abebe, Frehiwot
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: Many organizations use project management maturity models to improve their project performance. This study used Project Management Institute's PM solution's Maturity model to assess the maturity level of IOCC. PM solution's standard questionnaire were used to collect data from IOCC project managers, monitoring & evaluation specialists, finance and admin staff and staffs from the leadership. Key informant interview were conducted with experts from the leadership. Data are analyzed using SPSS to compute average project management maturity level of IOCC. Results are discussed qualitatively by comparing the results against the model's standard and theoretical reviews. Based on the assessment, IOCC PM Maturity is measured at 1.65 which is identified as level 2, where structured and standard processes are used but not applied to all projects. Among the knowledge areas, cost and time management have showed better maturity level 2.26 and 1.96 respectively. On the other hand, human resource and risk management and stakeholder management showed the least value measured as 1.15, 1.39 and 1.39 respectively. Such low maturity score depicts the organization performs the knowledge areas without following structured approach or guideline, relying solely on the knowledge and experience of the project team. As a result, the paper recommended there is a need to allocate resource for capacity building, standardize project management at institutional level. There is also a need to use computerized system for centralizing information and create experience sharing mechanisms among staff to transform individual understanding to enterprise wide knowledge and reach to the next level 3 and also help for a continuous learning to reach to level 4 and 5.
Ἒρωτος ἦτον ἠδονὴ καὶ πρᾶγμαν Ἀφροδίτης: Ανιχνεύσεις αντιεκκλησιαστικών τάσεων σε τέσσερις Παλαιολόγειες δημώδεις ερωτικές μυθιστορίες
Creators: name: Δόντσος, Γεώργιος Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2022
Subjects: Μεσαίωνας
μυθιστορίες
ησυχασμός
Middle Ages
romances
hesychasm

description: Σκοπός της παρούσας διατριβής ήταν η ανάδειξη αντιεκκλησιαστικών τάσεων στις Παλαιολόγειες δημώδεις ερωτικές μυθιστορίες Καλλίμαχος και Χρυσορρόη, Βέλθανδρος και Χρυσάντζα, Λίβιστρος και Ροδάμνη και Διήγησις του Αχιλλέως. Μέσω μιας παρουσίασης του πολιτικού, κοινωνικού και πολιτιστικού περιβάλλοντος του βυζαντινού 14ου αιώνα για να τοποθετηθούν εντός πλαισίου τα κείμενα, και μιας συνοπτικής εξέτασης της έννοιας του έρωτα εντός του βυζαντινού πολιτισμού, για να αναδειχθούν οι συνδηλώσεις του αισθήματος που προάγουν τα κείμενα, επιχειρήσαμε να δείξουμε πως αυτές οι μυθιστορίες εναντιώνονταν στην κοσμοθεωρία και στις επιταγές της ορθόδοξης εκκλησίας της εποχής των Παλαιολόγων και κυρίως του ησυχασμού, ενός μοναστικού κινήματος που τότε είχε επικρατήσει στους κόλπους της εκκλησίας. Προσπαθήσαμε τέλος, να διαυγάσουμε τους μηχανισμούς με τους οποίους οι μυθιστορίες προκαλούσαν την εκκλησιαστική κουλτούρα, εφαρμόζοντας εκ του σύνεγγυς αναγνώσεις στα κείμενα, πάντοτε με την βοήθεια της σχετικής βιβλιογραφίας
description: The aim of the present thesis was to show anti-ecclesiastical tendencies in the Palaiologan vernacular romances Kallimachos and Chryssorhoe, Velthandros and Chrysantza, Livistros and Rhodamne and Tale of Achilles. Through a presentation of the political, social and cultural milieu of the byzantine 14th century in order to contextualize the texts and with the aid of a brief examination of the concept of love as byzantine culture viewed it, so as to demonstrate the connotations of the feeling that the texts present, we tried to prove that these romances opposed the worldview and the prescripts that the orthodox church held at the time of Palaiologan rule and especially the ones that hesychasm, a monastic movement that dominated the church at the time, promoted. Finally, we attempted to clarify the mechanisms by which the romances challenged the culture of the church, through close reading assisted by the related bibliography
Spatial localization and pattern formation in discrete optomechanical cavities and arrays
Creators: name: Ruiz-Rivas, J.
name: Patera, G.
name: Navarrete-Benlloch, C.
name: Roldán, Eugenio
name: de Valcárcel, Germán J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We investigate theoretically the generation of nonlinear dissipative structures in optomechanical (OM) systems containing discrete arrays of mechanical resonators. We consider both hybrid models in which the optical system is a continuous multimode field, as it would happen in an OM cavity containing an array of micro-mirrors, and also fully discrete models in which each mechanical resonator interacts with a single optical mode, making contact with Ludwig & Marquardt [Phys. Rev. Lett. 101, 073603 (2013)]. Also, we study the connections between both types of models and continuous OM models. While all three types of models merge naturally in the limit of a large number of densely distributed mechanical resonators, we show that the spatial localization and the pattern formation found in continuous OM models can be still observed for a small number of mechanical elements, even in the presence of finite-size effects, which we discuss. This opens new venues for experimental approaches to the subject.
description: Comments and constructive criticism are welcome
title: Army permit No. SAJ-2018-00108 (201800108) - Kamyshnikov Seawall
titleType: AlternativeTitle
title: Endangered Species Act - Section 7 Consultation Biological Opinion SAJ-2018-00108 (LP-PMG) Alex Kamyshnikov Dock and seawall construction Miami-Dade County, Florida
Creators: name: United States. National Marine Fisheries Service. Southeast Region
Publisher: name: United States. National Marine Fisheries Service. Southeast Region
Year: 2018

description: SERO-2018-02210
Optimized plasma high harmonics generation from ultra-intense laser pulses
Creators: name: Tang, Suo
name: Kumar, Naveen
name: Keitel, Christoph H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Plasma high harmonics generation from an extremely intense short-pulse laser is explored by including the effects of ion motion, electron-ion collisions and radiation reaction force in the plasma dynamics. The laser radiation pressure induces plasma ion motion through the hole-boring effect resulting into the frequency shifting and widening of the harmonic spectra. Classical radiation reaction force slightly mitigates the frequency broadening caused by the ion motion. Based on the results and physical considerations, parameter maps highlighting optimum regions for generating a single intense attosecond pulse and coherent XUV radiations are presented.
description: Accepted for publication in Phys Rev E
Classroom offline para el fortalecimiento de competencia tecnológica en los estudiantes del grado 13-1 de la institución educativa normal superior de Mompós
Creators: name: Galvis Mora, Carlos Arturo
name: Madrigal Morales, Diva Cecilia
name: Ferreira Ramírez, Juan Manuel
Publisher: name: Universidad de Cartagena
Year: 2022
Subjects: subject: Competencias
subject: Tecnología de la información - Educación
subject: Tecnología educativa
subject: Enseñanza con ayuda de computadores
subject: Educación secundaria

description: La necesidad de ser un profesional que responda a las exigencias del siglo XXI como es el conocimiento de las TIC y su utilización en sus labores profesionales y personales, donde el proceso de enseñanza se encuentra mediado por las TIC ya que ésta impulsa la iniciativa y creatividad. La presente investigación presentó como objetivo general el fortalecer la Competencia Tecnológica en los estudiantes del grado 13-1 de la Institución Educativa Normal Superior de Mompós, donde se implementó como estrategia la utilización de la herramienta tecnológica “Classroom offline”, con una investigación cualitativa con el modelo Investigación Acción Pedagógica, a partir del desarrollo de cuatro talleres. Se concluyó que con la intervención de la herramienta tecnológica “Classroom offline”, se fortaleció las habilidades y conocimientos digitales de los estudiantes normalistas presentando algunas falencias respecto a su Competencia Tecnológica. Esta experiencia debe ser promovida en las instituciones educativas, con la intención de formar en conocimientos y habilidades relacionadas con las TIC. Si las instituciones educativas implementan esta estrategia generarían resultados que beneficien a diferentes instituciones y sus estudiantes, mejorando los procesos educativos y la formación profesional docente.
description: INTRODUCCIÓN 11 CAPITULO 1. PLANTEAMIENTO 12 FORMULACIÓN 14 ANTECEDENTES DEL PROBLEMA 15 JUSTIFICACIÓN 18 OBJETIVO GENERAL 20 OBJETIVOS ESPECÍFICOS 20 SUPUESTOS Y CONSTRUCTOS 21 ALCANCES Y LIMITACIONES 21 CAPITULO 2. MARCO DE REFERENCIA 23 MARCO CONTEXTUAL 23 MARCO NORMATIVO 35 MARCO TEÓRICO .39 MARCO CONCEPTUAL 44 CAPITULO 3 METODOLOGÍA 49 METODOLOGÍA 49 TIPO DE INVESTIGACIÓN 50 MODELO DE INVESTIGACIÓN 51 FASES DEL MODELO DE INVESTIGACIÓN 51 POBLACIÓN Y MUESTRA 53 CATEGORÍAS DE ESTUDIO 57 TÉCNICAS E INSTRUMENTOS DE RECOLECCIÓN DE DATOS 58 RUTA DE ANÁLISIS 59 RECURSOS PARA EL ANÁLISIS .60 ESTRUCTURA DE INSTRUMENTOS DE RECOLECCIÓN DE INFORMACIÓN 61 CAPITULO 4. INTERVENCIÓN PEDAGÓGICA 65 INTERVENCION PEDAGÓGICA EN EL AULA 65 ACTIVIDAD DIAGNÓSTICA 68 EVALUACIÓN FINAL 81 CAPITULO 5. ANÁLISIS, CONCLUSIONES Y RECOMENDACIONES .85 ANÁLISIS, CONCLUSIONES Y RECOMENDACIONES 85 REFERENCIAS BIBLIOGRÁFICA 93
Key in socially driven game dynamics, open the doors of agility - an empirical study on gamification and employee agility
Creators: name: Nivedhitha, K.S.
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biological Sciences not elsewhere classified
subject: Science Policy
subject: Mental Health
subject: Infectious Diseases
subject: FOS: Health sciences

description: While gamification researchers have emphasised the exploration of game dynamics beyond typical game mechanics, there is still a blind spot regarding how specific game dynamics driven by social features enhance individual agility in the workplace. Since socially driven game dynamics are essential for collective units like organisations, this research conceptualized collaborative competition, paralinguistic digital recognition, and dynamic interactions as socially driven game dynamics and further, investigated how these game dynamics enhance individual agility through a moderated mediation model. Adopting a purposive sampling technique, 421 complete responses were found to be suitable for further analysis. The hypotheses were tested using an observed variable approach (Process Macro). The indirect effect of paralinguistic digital recognition on employee agility through collective engagement was found to be stronger than that of other game dynamics, such as collaborative competition and dynamic interactions. As hypothesised, collective goal difficulty acts as a positive moderator, accentuating the mediating effect of collective engagement. This study is one of the first works explaining the association between gamification and employee agility with a systematic framework, therefore advancing the existing literature on gamification and employee agility.
Quadrangular embeddings of complete graphs and the Even Map Color Theorem (with details)
Creators: name: Liu, Wenzhong
name: Lawrencenko, Serge
name: Chen, Beifang
name: Ellingham, M. N.
name: Hartsfield, Nora
name: Yang, Hui
name: Ye, Dong
name: Zha, Xiaoya
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C10 (primary) 05C15 (secondary)

description: Hartsfield and Ringel constructed orientable quadrangular embeddings of the complete graph $K_n$ for $n\equiv 5 \pmod 8$, and nonorientable ones for $n \ge 9$ and $n\equiv 1 \pmod 4$. These provide minimal quadrangulations of their underlying surfaces. We extend these results to determine, for every complete graph $K_n$, $n \ge 4$, the minimum genus, both orientable and nonorientable, for the surface in which $K_n$ has an embedding with all faces of degree at least $4$, and also for the surface in which $K_n$ has an embedding with all faces of even degree. These last embeddings provide sharpness examples for a result of Hutchinson bounding the chromatic number of graphs embedded with all faces of even degree, completing the proof of the Even Map Color Theorem. We also show that if a connected simple graph $G$ has a perfect matching and a cycle then the lexicographic product $G[K_4]$ has orientable and nonorientable quadrangular embeddings; this provides new examples of minimal quadrangulations.
description: Version 3 is a minor update to version 2, which was a major revision of version 1. Versions 2 and 3 contain details omitted from the published version. For version 3, Lemma 5.4 has been generalized and the proof simplified, and we now cite the published version of the paper. 26 pages; 6 figures
Desarrollo de software para identificación de anomalías no comunes en la proteína P53 y casos de hepatocarcinoma celular
Creators: name: Orozco Méndez, Daniel Andrés
name: Castillo Beltrán, Javier David
Publisher: name: Universidad de Cartagena
Year: 2017
Subjects: Desarrollo de software
Ingeniería de software

description: Tesis (Ingeniero de Sistemas).--Universidad de Cartagena. Facultad de Ciencias E Ingenierías. Programa de Ingeniería de Sistemas, 2017
description: El presente estudio tiene por objeto facilitar el estudio de la secuencia aminoacídica de p53. De tal forma que se pueda realizar comparaciones entre la secuencia de aminoácidos de p53 en su forma común con ejemplos de otras p53 que tendrían mutaciones en su secuencia de aminoácidos, comparar los resultados obtenidos con otras investigaciones que relacionan el tipo de mutación con un tipo de hepatocarcinoma celular (HCC) especifico y posteriormente graficar en un modelo 3D la estructura de la proteína mutada.
Determinación de la vulnerabilidad en las casas en el barrio San Diego de la ciudad de Cartagena
Creators: name: Barrera Ramos, Omar
name: Nieves Corredor, Oscar
Publisher: name: Universidad de Cartagena
Year: 2015
Subjects: Vulnerabilidad Sismica
Análisis estructural

description: Tesis(Ingeniero Civil).--Universidad de Cartagena.Facultad de Ciencias E Ingeniería.Programa de Ingeniería Civil,2015
description: El presente estudio tiene por objetivo determinar qué tan vulnerables son las casas coloniales de barrio San Diego a partir de un método cualitativo denominado índice de vulnerabilidad, justificado por la importancia como icono histórico al hacer parte del centro de la ciudad de Cartagena, el cual es considerado patrimonio de la humanidad.
Challenges Confronting Project Management Processes for the Success of Hydropower Projects: A case study of Ethiopian Electric Power (EEP)
Creators: name: Yibgeta, Dawit
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: The success of hydropower projects of Ethiopian Electric Power (EEP) can be aligned with the use of construction project management processes, although, the projects have been impacted by issues such as time overrun, cost overrun, poor quality and poor risk management. The aim of this study is to examine the challenges confronting project management practice for the success of hydropower projects in EEP. Research data was obtained by means of using questionnaire and interview. A sample size of sixty-one (61) Ethiopian Electric Power staffs was used for the study. Challenges such as misuse of time, bad management, inability to develop project knowledge and project management methodology, lack of developing integrated project management plan, inadequate project planning, inadequate project schedule management practices and political influence to change project scope and plans were identified as the most challenges confronting the project management processes for the success of hydropower projects of EEP. The study recommended that providing project management competency trainings, strengthening project monitoring and evaluation system, giving focus to the project management challenges, enhancing utilization of project management processes, developing organizational project management system and institutionalizing the project management competence in order to improve the challenges of hydropower projects in EEP.
Die fachwissenschaftliche Basis des Lehrerwissens: Elementarmathematik
Creators: name: Wittmann, Erich Ch.
Publisher: name: Gesellschaft für Didaktik der Mathematik
Year: 2007
Subjects: subject: 510

description: Mit dem vorliegenden Beitrag soll der Blick auf die fachwissenschaftliche Komponente der Lehrerbildung gerichtet werden, die nach Auffassung des Autors der blinde Fleck der Bildungspolitik in den Bemühungen um eine Verbesserung des Mathematikunterrichts ist. Der Beitrag ist folgendermaßen aufgebaut: im ersten Abschnitt wird aufgezeigt, dass die weithin herrschende Praxis der fachwissenschaftlichen Mathematiklehrerbildung nicht zu den heutigen Vorstellungen von Lehren und Lernen in der Schule passt. Im zweiten Teil wird dargelegt, dass dieses Problem durch die aktuellen empirisch-analytischen Forschungen zur Professionalisierung kaum berührt wird, sondern nur konstruktiv durch neue Lehrerausbildungskonzepte gelöst werden kann. Dafür wird ein Beispiel gegeben. Im dritten Abschnitt wird kurz angedeutet, welche Art von fachdidaktischer Forschung nötig ist, um die Entwicklung neuartiger Konzepte zu unterstützen.
Size-dependent commensurability and its possible role in determining the frictional behavior of adsorbed systems
Creators: name: Restuccia, Paolo
name: Ferrario, Mauro
name: Sivestrelli, Pier Luigi
name: Mistura, Giampaolo
name: Righi, Maria Clelia
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Recent nanofriction experiments of xenon on graphene revealed that the slip onset can be induced by increasing the adsorbate coverage above a critical value, which depends on temperature. Moreover, the xenon slippage on gold is much higher than on graphene in spite of the same physical nature of the interactions. To shed light on these intriguing results we have performed molecular dynamics simulations relying on ab initio derived potentials. By monitoring the interfacial structure factor as a function of coverage and temperature, we show that the key mechanism to interpret the observed frictional phenomena is the size-dependence of the island commensurability. The latter quantity is deeply affected also by the lattice misfit, which explains the different frictional behavior of Xe on graphene and gold.
description: 9 pages, 4 figures, 2 tables
Performance prediction of finite-difference solvers for different computer architectures
Creators: name: Louboutin, Mathias
name: Lange, Michael
name: Herrmann, Felix
name: Kukreja, Navjot
name: Gorman, Gerard
Publisher: name: arXiv
Year: 2016
Subjects: subject: Performance (cs.PF)
subject: FOS: Computer and information sciences

description: The life-cycle of a partial differential equation (PDE) solver is often characterized by three development phases: the development of a stable numerical discretization, development of a correct (verified) implementation, and the optimization of the implementation for different computer architectures. Often it is only after significant time and effort has been invested that the performance bottlenecks of a PDE solver are fully understood, and the precise details varies between different computer architectures. One way to mitigate this issue is to establish a reliable performance model that allows a numerical analyst to make reliable predictions of how well a numerical method would perform on a given computer architecture, before embarking upon potentially long and expensive implementation and optimization phases. The availability of a reliable performance model also saves developer effort as it both informs the developer on what kind of optimisations are beneficial, and when the maximum expected performance has been reached and optimisation work should stop. We show how discretization of a wave equation can be theoretically studied to understand the performance limitations of the method on modern computer architectures. We focus on the roofline model, now broadly used in the high-performance computing community, which considers the achievable performance in terms of the peak memory bandwidth and peak floating point performance of a computer with respect to algorithmic choices. A first principles analysis of operational intensity for key time-stepping finite-difference algorithms is presented. With this information available at the time of algorithm design, the expected performance on target computer systems can be used as a driver for algorithm design.
Aufgaben zur Wahrscheinlichkeitsrechnung in der Grundschule?
Creators: name: Neubert, Bernd
Publisher: name: Gesellschaft für Didaktik der Mathematik
Year: 2007
Subjects: subject: 510

description: Durch die Zielstellungen in den Bildungsstandards wird für die Umsetzung der Leitidee "Daten, Häufigkeit, Wahrscheinlichkeit" auf das Einschätzen von Gewinnchancen bei einfachen Zufallsexperimenten als eine Möglichkeit der Integration von Elementen der Wahrscheinlichkeitsrechnung in den Unterricht der Grundschule orientiert. Im Folgenden werden ausgewählte Ergebnisse zweier Studien vorgestellt. Ziel der Studien war es zu untersuchen, welche Kompetenzen Grundschüler ohne Vorkenntnisse zur Wahrscheinlichkeitsrechnung aus dem vorangegangenen Unterricht zum Einschätzen von Gewinnchancen an Zufallsgeneratoren schon besitzen. In der ersten Studie wurden Schüler 4. Klassen mit Aufgaben gleicher mathematischer Struktur zum Urnenmodell und zum Glücksrad konfrontiert, in der zweiten Studie wurden Schülern einer 3. Klasse verschiedene Aufgaben zum Glücksrad gestellt.
Relationship among various Vietoris-type and microsimplicial homology theories
Creators: name: Imamura, Takuma
Publisher: name: arXiv
Year: 2016
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 55N05 (Primary), 55N35, 54J05 (Secondary)

description: In this paper, we clarify the relationship among the Vietoris-type homology theories and the microsimplicial homology theories, where the latter are nonstandard homology theories defined by M. C. McCord (for topological spaces), T. Korppi (for completely regular topological spaces) and the author (for uniform spaces). We show that McCord's and our homology are isomorphic for all compact uniform spaces and that Korppi's and our homology are isomorphic for all fine uniform spaces. Our homology shares many good properties with Korppi's homology. As an example, we outline a proof of the continuity of our homology with respect to uniform resolutions. S. Garavaglia proved that McCord's homology is isomorphic to Vietoris homology for all compact topological spaces. Inspired by this result, we prove that our homology is isomorphic to uniform Vietoris homology for all precompact uniform spaces and that Korppi's homology is isomorphic to normal Vietoris homology for all pseudocompact completely regular topological spaces.
A helium-burning white dwarf binary as a supersoft X-ray source
Creators: name: Greiner, J.
name: Maitra, C.
name: Haberl, F.
name: Willer, R.
name: Burgess, J. M.
name: Langer, N.
name: Bodensteiner, J.
name: Buckley, D. A. H.
name: Monageng, I. M.
name: Udalski, A.
name: Ritter, H.
name: Werner, K.
name: Maggi, P.
name: Jayaraman, R.
name: Vanderspek, R.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Type Ia supernovae are cosmic distance indicators, and the main source of iron in the Universe, but their formation paths are still debated. Several dozen supersoft X-ray sources, in which a white dwarf accretes hydrogen-rich matter from a non-degenerate donor star, have been observed and suggested as Type Ia supernovae progenitors. However, observational evidence for hydrogen, which is expected to be stripped off the donor star during the supernova explosion, is lacking. Helium-accreting white dwarfs, which would circumvent this problem, have been predicted for more than 30 years, also including their appearance as supersoft X-ray sources, but have so far escaped detection. Here we report a supersoft X-ray source with an accretion disk whose optical spectrum is completely dominated by helium, suggesting that the donor star is hydrogen-free. We interpret the luminous and supersoft X-rays as due to helium burning near the surface of the accreting white dwarf. The properties of our system provides evidence for extended pathways towards Chandrasekhar mass explosions based on helium accretion, in particular for stable burning in white dwarfs at lower accretion rates than expected so far. This may allow to recover the population of the sub-energetic so-called Type Iax supernovae, up to 30% of all Type Ia supernovae, within this scenario.
Konzeption und Implementierung eines dreidimensionalen Klassenbrowser für Java
Creators: name: Engelen, Frank
Publisher: name: Universität Dortmund
Year: 2003
Subjects: subject: 004

description: In der Softwareentwicklung ist der Einsatz von Diagrammen schon lange üblich. Die Komplexität moderner Softwaresysteme führt allerdings dazu, daß Diagramme, die deren Struktur verdeutlichen sollen, oft unübersichtlich erscheinen. Dies gilt insbesondere bei einer automatischer Generierung der Darstellung. Verschiedene Studien haben gezeigt, daß sich durch dreidimensionale Graphiken umfangreiche Sachverhalte besser verdeutlichen lassen. Ziel dieser Arbeit ist es deshalb, ein Konzept für eine dreidimensionale Visualisierung von Softwarestrukturen aufzuzeigen und dieses prototypisch umzusetzen. Dies erfolgt am Beispiel von Software, die in der Programmiersprache Java implementiert ist. Das entwickelte Konzept beruht insbesondere auf einer Kombination verschiedener zwei- und dreidimensionaler Visualisierungstechniken, wie z.B. der Cone Trees oder Information Cubes. Es zeigte sich, daß Sprachkonzepte von Java, wie z.B. Klassifizierung oder Vererbung, nicht starr auf bestimmte Darstellungstechniken abgebildet werden sollten, sondern eine Lösung vorzuziehen ist, die es erlaubt, zwischen verschiedenen Techniken gemäß der Eigenschaften des zu zeigenden Sachverhaltes auszuwählen. So entstand eine Art "Baukasten für Visualisierungen", der Anwendern eine Reihe von Techniken anbietet, die sie flexibel einsetzen können. Für die Umsetzung des Konzepts wurde eine Kombination aus einem Java-Applet und der Virtual Reality Modeling Language (VRML) eingesetzt.
The compactness locus of a geometric functor and the formal construction of the Adams isomorphism
Creators: name: Sanders, Beren
Publisher: name: arXiv
Year: 2016
Subjects: subject: Category Theory (math.CT)
subject: Algebraic Geometry (math.AG)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics

description: We introduce the compactness locus of a geometric functor between rigidly-compactly generated tensor-triangulated categories, and describe it for several examples arising in equivariant homotopy theory and algebraic geometry. It is a subset of the tensor-triangular spectrum of the target category which, crudely speaking, measures the failure of the functor to satisfy Grothendieck-Neeman duality (or equivalently, to admit a left adjoint). We prove that any geometric functor --- even one which does not admit a left adjoint --- gives rise to a Wirthmüller isomorphism once one passes to a colocalization of the target category determined by the compactness locus. When applied to the inflation functor in equivariant stable homotopy theory, this produces the Adams isomorphism.
description: 45 pages. Proof of Proposition 3.2 corrected, major revision to Section 7 (now containing stronger results), minor expository improvements elsewhere
Assessment Of Project Management Practice. The Case Of 20 Ethiopian Resident Charities In Addis Ababa
Creators: name: Tesfaye, Yonas
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: The study used Project management Institute's PM solution's Maturity model to assess the Project management practice level of 20 Ethiopian resident charities. The objective of this study was to assess project management practice and process maturity level of the Ethiopian resident charities. The study used standard questionnaires for project managers, the model uses levels 1-5 in increasing order. Level 1 is the lowest project performance of the organization without following a structured approach to implementing projects while level 5 is the highest performance by the organization with continuous improvement. The finding of the assessment indicated that the overall assessment of all project mangement process group is 2.28 with little variations among the process groups The findings of the study also revealed that the overall practice on maturity of project management knowledge areas is found to be 2.15 Among the knowledge areas Cost management is relatively better maturity level of 2.68. Quality, Human resource, and Risk management are the least matured areas with a level of 1.9,1.925 and 2.025respectively. There is no significance difference among the rest of the project management knowledge areas This shows, on average, the organization Project Management process and practice maturity is at the basic level. Thus, improvement efforts should be taken to improve the current level of project management practice of all the project management process group as well as all the PMBOK areas
Estructuración de un modelo de servicio al cliente dirigido a las empresas de vigilancia electrónica en la ciudad de Cartagena
Creators: name: Segura Gutierrez, Liliana
name: Pereira Betancourt, Rodolfo
Publisher: name: Universidad de Cartagena
Year: 1999
Subjects: Servicio al cliente
Satisfacción del cliente
Calidad del servicio

description: Tesis (Administrador de Empresas).--Universidad de Cartagena. Facultad de Ciencias Económicas. Programa de Administración de Empresas,1999
description: El presente estudio tiene por objeto estructura un modelo de servicio al cliente para las empresas de seguridad electrónica con el propósito de satisfacer las necesidades del cliente y asegurar la permanencia, crecimiento y rentabilidad en un mercado cada vez más dinámico y competitivo.
The in-plane tensile and shear properties of novel chiral cellular structures
Creators: name: Liu, Weidong
name: Yang, Zhendong
name: Zhang, Jiong
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Space Science
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences

description: Cellular structures have been widely studied and employed in engineering because of their excellent mechanical properties. To enrich the geometric diversity of cellular structures, we proposed two novel chiral cellular structures composed of half-periodic and full-periodic cosinoidal beams respectively in this paper. The in-plane elastic properties were studied by a combination of the energy method and the finite element analysis, and verified by the experimental test. The influences of geometric parameters on the elastic constants were analyzed. Then, the elastic properties of the two structures as well as the V-shaped chiral structure were compared. Finally, error analysis was carried out on the theoretical models. Results show that: (1) the two structures own considerably low equivalent elastic moduli and extremely high strain capabilities, and possess certain in-plane elastic coupling effects; (2) the elastic properties of the two structures are highly tunable with the variations of geometric parameters; (3) the elastic moduli of the two structures are lower than that of the V-shaped structure, and the structure with half-periodic beams exhibits the lowest in-plane stiffness and the highest strain capabilities; (4) the theoretical models without considering the internal axial force are convincible in predicting the elastic properties when the corresponding chord ratio is larger than 0.2. Generally, the proposed structures have great potential as flexible structures for morphing application.
Photo-z-SQL: integrated, flexible photometric redshift computation in a database
Creators: name: Beck, Róbert
name: Dobos, László
name: Budavári, Tamás
name: Szalay, Alexander S.
name: Csabai, István
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Databases (cs.DB)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We present a flexible template-based photometric redshift estimation framework, implemented in C#, that can be seamlessly integrated into a SQL database (or DB) server and executed on-demand in SQL. The DB integration eliminates the need to move large photometric datasets outside a database for redshift estimation, and utilizes the computational capabilities of DB hardware. The code is able to perform both maximum likelihood and Bayesian estimation, and can handle inputs of variable photometric filter sets and corresponding broad-band magnitudes. It is possible to take into account the full covariance matrix between filters, and filter zero points can be empirically calibrated using measurements with given redshifts. The list of spectral templates and the prior can be specified flexibly, and the expensive synthetic magnitude computations are done via lazy evaluation, coupled with a caching of results. Parallel execution is fully supported. For large upcoming photometric surveys such as the LSST, the ability to perform in-place photo-z calculation would be a significant advantage. Also, the efficient handling of variable filter sets is a necessity for heterogeneous databases, for example the Hubble Source Catalog, and for cross-match services such as SkyQuery. We illustrate the performance of our code on two reference photo-z estimation testing datasets, and provide an analysis of execution time and scalability with respect to different configurations. The code is available for download at https://github.com/beckrob/Photo-z-SQL.
description: 14 pages, 5 figures. Minor revision accepted by Astronomy & Computing on 2017 March 11
Poética del plebeyismo en la guaracha del Macho Camacho
Creators: name: Castillo Castro, Oscar
Publisher: name: Universidad de Cartagena
Year: 1998
Subjects: Sánchez, Luis Rafael - Crítica e interpretación
Socio - Lingüística
Extralingüística
Dialectología
Literatura puertorriqueña - Colección de textos

description: Tesis (Profesional en Lingüística y Literatura) -- Universidad de Cartagena. Facultad de Ciencias Humanas. Programa de Lingüística y Literatura, 1998
description: En el presente artículo hay dos niveles de análisis para concretar nuestro estudio. El primero, preliminar y contextualizante, abarcará un aspecto básico: el plebeyísimo en la cultura popular puertorriqueña, referencia extratextual, que aporte elementos muy valiosos para el presente estudio. El segundo nivel desarrolla el trabajo de análisis de la poética de la novela “La guaracha del Macho Camacho”, desde la perspectiva del plebeyísimo.
Effect of Reward on Employees Job Satisfaction. A Study on case of Nib Insurance Company
Creators: name: Shenkute, Meskerem
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: The main objective of study investigates the effect of Extrinsic and Intrinsic reward on employees' satisfaction in Nib Insurance Company. Data was collected by use of structured questionnaire; 180 questionnaires were distributed among the employees that was drawn from a stratified sampling method from a population of 409 employees of Nib Insurance Company and 170 of questionnaires were completed returned for response rate of 94%. The study used both descriptive statistics (frequencies, mean, and percentages) and inferential statistics to answer the research questions posed for the study. The data was analysed using Statistical Package for the Social Sciences (SPSS). The finding shows that more than half of respondents express their overall job dissatisfaction. Moreover employees perceive that they do too much work for small pay and they feel that other organization in the insurance industry pay more than they earn for the job that require the same qualification. Therefore employee perception of inequity is high. Which implies the availability of high turnover . In general the results predicted that there exists a positive and significant relation among extrinsic and intrinsic rewards and job satisfaction. Therefore Nib Insurance Company should invest in the long term goal of employees and learn to balance their interest to earn a higher profit with those of its employees
Mean Deviation Similarity Index: Efficient and Reliable Full-Reference Image Quality Evaluator
Creators: name: Nafchi, Hossein Ziaei
name: Shahkolaei, Atena
name: Hedjam, Rachid
name: Cheriet, Mohamed
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Applications of perceptual image quality assessment (IQA) in image and video processing, such as image acquisition, image compression, image restoration and multimedia communication, have led to the development of many IQA metrics. In this paper, a reliable full reference IQA model is proposed that utilize gradient similarity (GS), chromaticity similarity (CS), and deviation pooling (DP). By considering the shortcomings of the commonly used GS to model human visual system (HVS), a new GS is proposed through a fusion technique that is more likely to follow HVS. We propose an efficient and effective formulation to calculate the joint similarity map of two chromatic channels for the purpose of measuring color changes. In comparison with a commonly used formulation in the literature, the proposed CS map is shown to be more efficient and provide comparable or better quality predictions. Motivated by a recent work that utilizes the standard deviation pooling, a general formulation of the DP is presented in this paper and used to compute a final score from the proposed GS and CS maps. This proposed formulation of DP benefits from the Minkowski pooling and a proposed power pooling as well. The experimental results on six datasets of natural images, a synthetic dataset, and a digitally retouched dataset show that the proposed index provides comparable or better quality predictions than the most recent and competing state-of-the-art IQA metrics in the literature, it is reliable and has low complexity. The MATLAB source code of the proposed metric is available at https://www.mathworks.com/matlabcentral/fileexchange/59809.
description: 11 pages, 8 figures, 6 tables
May axion clusters be sources of fast radio bursts?
Creators: name: Pshirkov, Maxim S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Fast radio bursts can be caused by some phenomena related to 'new physics'.One of the most prominent candidates of the kind are axion Bose stars which can engender bursts when undergoing conversion into photons in magnetospheres of neutron stars or during their collapse. In this short research note an importance of three observational criteria is outlined, namely total energetic, $\mathcal{O}$(ms) duration and non-monochromatic shape of the spectrum. It is shown that it is impossible to meet these criteria in simplified models of axion-neutron star interaction scenario and thorough investigation of more complex models which involve back-reaction and non-linear effects are needed in order to explain FRBs within this scenario.
description: 4 pages, no figures, matches the published version
KPZ equation with short-range correlated noise: emergent symmetries and non-universal observables
Creators: name: Mathey, Steven
name: Agoritsas, Elisabeth
name: Kloss, Thomas
name: Lecomte, Vivien
name: Canet, Léonie
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the stationary-state fluctuations of a growing one-dimensional interface described by the KPZ dynamics with a noise featuring smooth spatial correlations of characteristic range $ξ$. We employ Non-perturbative Functional Renormalization Group methods in order to resolve the properties of the system at all scales. We show that the physics of the standard (uncorrelated) KPZ equation emerges on large scales independently of $ξ$. Moreover, the Renormalization Group flow is followed from the initial condition to the fixed point, that is from the microscopic dynamics to the large-distance properties. This provides access to the small-scale features (and their dependence on the details of the noise correlations) as well as to the universal large-scale physics. In particular, we compute the kinetic energy spectrum of the stationary state as well as its non-universal amplitude. The latter is experimentally accessible by measurements at large scales and retains a signature of the microscopic noise correlations. Our results are compared to previous analytical and numerical results from independent approaches. They are in agreement with direct numerical simulations for the kinetic energy spectrum as well as with the prediction, obtained with the replica trick by Gaussian variational method, of a crossover in $ξ$ of the non-universal amplitude of this spectrum.
Differentially Private Random Decision Forests using Smooth Sensitivity
Creators: name: Fletcher, Sam
name: Islam, Md Zahidul
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: We propose a new differentially-private decision forest algorithm that minimizes both the number of queries required, and the sensitivity of those queries. To do so, we build an ensemble of random decision trees that avoids querying the private data except to find the majority class label in the leaf nodes. Rather than using a count query to return the class counts like the current state-of-the-art, we use the Exponential Mechanism to only output the class label itself. This drastically reduces the sensitivity of the query -- often by several orders of magnitude -- which in turn reduces the amount of noise that must be added to preserve privacy. Our improved sensitivity is achieved by using "smooth sensitivity", which takes into account the specific data used in the query rather than assuming the worst-case scenario. We also extend work done on the optimal depth of random decision trees to handle continuous features, not just discrete features. This, along with several other improvements, allows us to create a differentially private decision forest with substantially higher predictive power than the current state-of-the-art.
description: Pre-print of 2017 paper published in Expert Systems with Applications, 36 pages; 2021 Addendum added to end of paper