cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Assessing The Implmentation Challenges Of Agent Banking Project: Retrospective Case Study Of Commercial Bank Of Ethiopia
Creators: name: Negesse, Yewubnesh
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: The main objective of this study was to describe the implementation challenges of agent banking project in commercial bank of Ethiopia. In order to achieve this objective, the researcher used descriptive research design and mixed approaches. Accordingly, questionnaire, interview and document analysis were used as data collection instrument. The data obtained through questionnaire has been analyzed quantitatively by using descriptive statistics: frequency, percentage, mean and standard deviation. Moreover, the data obtained by using interviews has been analyzed qualitatively. The population of the study was all employees of agent banking project of Commercial Bank of Ethiopia a total of 32. The target population used to collect data was project manager, team leaders and team members of the project. The findings of the study revealed that the major challenges in the implementation of agent banking were lack of infrastructural facilities, literacy, efficient time management, adequate government support, timely delivery of required physical equipment's, willingness to use the system, skill in technical and managerial knowledge, well develop and quality ICT infrastructures, adequate and frequent training, and efficient connection of internet and mobile networks. The implementing of agent banking system is affected by organizational, individual and environmental challenges. Hence, the researcher has recommended that the company should consider organizational, individual and environmental factors that influence the implementation of agent banking, The bank should train project team members, staffs, agents and customers in preparation for implementation of project to be successful, and government should support banking sector by facilitating development of sufficient ICT and infrastructural facilities like road, quality of network. Finally, the researcher also recommended that it is very essential more research case studies of agent banking implementation should be conducted in Ethiopian organization to strengthen the findings of implementation challenges and adaptability of the system advantage.
Two-Particle Tight-Binding Description of Higher-Harmonic Generation in Semiconductor Nanostructures
Creators: name: Peschel, Ulf
name: Lettau, Thomas
name: Gräfe, Stefanie
name: Busch, Kurt
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We develop a quantum mechanical theory to describe the optical response of semiconductor nanostructures with a particular emphasis on higher-order harmonic Generation. Based on a tight-binding approach we take all two-particle correlations into account thus describing the creation, evolution and annihilation of electron and holes. In the limiting case of bulk materials, we obtain the same precision as that achieved by solving the well-established semiconductor Bloch Equations. For semiconducting structures of finite extent, we also incorporate the surrounding space thus enabling a description of electron emission. In addition, we incorporate different relaxation mechanisms such as dephasing and damping of intraband currents. Moreover, the advantage of our description is that, starting from extremely precise material data as e.g., from tight-binding parameters obtained from density-functional-theory calculations, we obtain a numerical description being by far less computationally challenging and resource-demanding as comparable ab-initio approaches, e.g., those based on time-dependent density functional theory.
Competencias comunicativas digitales en los docentes para la educación virtual en tiempos de pandemia
Creators: name: Ramos Pérez, Yohanna Patricia
Publisher: name: Universidad de Cartagena
Year: 2021
Subjects: subject: Tecnología educativa
subject: Análisis de contenido (Comunicación) - Enseñanza
subject: Innovaciones educativas
subject: Sitios web educativos

description: El objetivo de la investigación se orientó a fortalecer las competencias comunicativas digitales de los docentes de los ciclos III y IV para la educación virtual en tiempos de pandemia de la Institución Educativa Marceliano Polo del municipio de Cereté, Córdoba, con los aportes teóricos de Berket et al., (2006), Espinoza et al., (2019) y Larraz (2013), entre otros. Se consideró una investigación cualitativa con modelo de campo apoyada en el enfoque de Investigación Acción Pedagógica para un proceso interpretativo; en una muestra de 10 docentes de los ciclos III y IV de la I.E. Marceliano Polo. Como técnicas de recolección de datos se usaron: el registro de relatos, observación participante y entrevista abierta y como instrumentos: referentes de campo, una guía de desempeño docente y un formulario cuestionario con 9 preguntas, validado en su contenido por 3 expertos. Se estableció una ruta de investigación con las etapas: exploratoria (prueba de entrada), descriptiva y valorativa (prueba de salida). Se diseñó e implementó una estrategia pedagógica denominada Domesticación de Competencias Comunicativas Digitales para la Educación Virtual (DCCDEV) y el Recurso Educativo Digital Curso en Línea a través de una secuencia didáctica. Se concluyó que el alcance de la implementación de la estrategia (DCCDEV), fue efectivo en el fortalecimiento de las competencias comunicativas digitales de los docentes de los ciclos III y IV de la Institución Educativa Marceliano Polo durante la educación virtual en tiempos de pandemia
The Effect Of Procurement Method In The Construction Sector: A Case Of Radisson Blu Plaza Hotel
Creators: name: Elias, Absera
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: One of the features of the construction industry over the last three decades or so, has been the use of various procurement methods for project such as management contracting, project management, and design and building. With the development of applying these methods several researchers have conducted various research to examine the criteria for their selection and their performance in terms of time, cost, and quality. The aim of this study is to investigate the process and effect of procurement related factors such as procurement selection criteria, and to suggesting methods and variation orders on project performance. The researcher collected data by using mixed approach, which mainly consists of both qualitative and quantitative (quail-quanti) approaches. The research design adopted to conduct this study is that of a Case Study approach. To conduct the research, the researcher relied up on non-probability sampling methods. Of this type of sampling, a purposive sampling technique was used to select the specific center. The target groups in this study are the Consultants, Contractors, Procurement experts, Architects, and employees related to the Radisson Blu Plaza Hotel construction project. The research employs gathering of both primary and secondary data to address the research questions. Based on the study the researcher was able to conclude that there weren't that much of a difference between the consultants and the contractors regarding the effects especially on the factor related to clients affect the procurement method of the Radisson Blu Plaza construction project greatly. More than half of the respondents agreed that factors related to clients had a higher effect on procurement method and the performance of the project. Based on the findings the researcher recommended that all parties should familiarize themselves with various types of procurement methods to assist them to make a well-informed decision on procurement and try to mix some of them to fill in some gaps. The clients should also have a clear understanding of what they want and hire a professional and relay on their expert judgments
The free field representation for the $GL(1|1)$ WZW model revisited
Creators: name: Lashkevich, Michael
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The $GL(1|1)$ WZW model in the free field realization that uses the $bc$ system is revisited. By bosonizing the $bc$ system we describe the Neveu--Schwarz and Ramond sector modules $\mathcal V^{\text{NS}}_{en}=\bigoplus_{l\in\mathbb Z}\mathcal V^l_{en}$ and $\mathcal V^{\text{R}}_{en}=\bigoplus_{l\in\mathbb Z+{1\over2}}\mathcal V^l_{en}$ in terms of the subspaces of a given fermion number $l$. We show that there are two sectors of mutually local operators, each consists of all Neveu--Schwarz operators and of Ramond operators with either integer or half-integer spins. Conformal blocks and structure constants are found for operators that correspond the highest weight vectors of the spaces $\mathcal V^l_{en}$. The crossing and braiding matrices are considered and the hexagon and pentagon equations are shown to be satisfied for typical modules. The degenerate case of conformal blocks with atypical (logarithmic) modules as intermediate states is considered. The known conformal block decomposition of correlation functions in the degenerate case is shown to be related to the degeneration splitting in the crossing and braiding relations. The scalar product in atypical modules is discussed. The decomposition of unity in the full correlation functions in the degenerate case in terms of this scalar product is explained.
description: 31 pages; v2: a few typos corrected; v3: minor changes, typos corrected
Local arboreal representations
Creators: name: Anderson, Jacqueline
name: Hamblen, Spencer
name: Poonen, Bjorn
name: Walton, Laura
Publisher: name: arXiv
Year: 2016
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11S82, 11F80, 11S15, 37P05, 37P20

description: Let $K$ be a field complete with respect to a discrete valuation $v$ of residue characteristic $p$. Let $f(z) \in K[z]$ be a separable polynomial of the form $z^\ell-c.$ Given $a \in K$, we examine the Galois groups and ramification groups of the extensions of $K$ generated by the solutions to $f^n(z)=a$. The behavior depends upon $v(c)$, and we find that it shifts dramatically as $v(c)$ crosses a certain value: $0$ in the case $p \nmid \ell$, and $-p/(p-1)$ in the case $p=\ell$.
description: 16 pages; journal reference added
Higher-order interactions shape collective dynamics differently in hypergraphs and simplicial complexes
Creators: name: Zhang, Yuanzhao
name: Lucas, Maxime
name: Battiston, Federico
Publisher: name: arXiv
Year: 2022
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Systems and Control (eess.SY)
subject: Dynamical Systems (math.DS)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: Higher-order networks have emerged as a powerful framework to model complex systems and their collective behavior. Going beyond pairwise interactions, they encode structured relations among arbitrary numbers of units through representations such as simplicial complexes and hypergraphs. So far, the choice between simplicial complexes and hypergraphs has often been motivated by technical convenience. Here, using synchronization as an example, we demonstrate that the effects of higher-order interactions are highly representation-dependent. In particular, higher-order interactions typically enhance synchronization in hypergraphs but have the opposite effect in simplicial complexes. We provide theoretical insight by linking the synchronizability of different hypergraph structures to (generalized) degree heterogeneity and cross-order degree correlation, which in turn influence a wide range of dynamical processes from contagion to diffusion. Our findings reveal the hidden impact of higher-order representations on collective dynamics, highlighting the importance of choosing appropriate representations when studying systems with nonpairwise interactions.
description: Published version. Y.Z. and M.L. contributed equally to this work. Code available at https://github.com/maximelucas/HOI_shape_sync_differently
Viable quark-lepton Yukawa ratios and nucleon decay predictions in $SU(5)$ GUTs with type-II seesaw
Creators: name: Antusch, Stefan
name: Hinze, Kevin
name: Saad, Shaikh
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the viability of predictive schemes for quark-lepton Yukawa ratios and nucleon decay in non-supersymmetric SU(5) Grand Unified Theories (GUTs) where neutrino masses are generated by a type II seesaw mechanism. The scalar sector of the considered scenario contains 5-, 24- and 45-dimensional representations plus a 15-dimensional representation for realising the type II seesaw. Predictions for the ratios of the quark and lepton Yukawa couplings emerge when the relevant entries of the Yukawa matrices are generated from single joint GUT operators (i.e. under the condition of "single operator dominance"). Focusing on the 2nd and 3rd family and hierarchical Yukawa matrices, we show that only two sets of predictions, $\frac{y_τ}{y_b}=\frac{3}{2}$, $\frac{y_μ}{y_s}=\frac{9}{2}$ and $\frac{y_τ}{y_b}=2$, $\frac{y_μ}{y_s}=6$ are viable. To further investigate both options, we extend the minimal scenarios to two "toy models", including the 1st family of charged fermions, and calculate the models' predictions, e.g. for the nucleon decay rates and for the masses of the light relics that are potentially within reach of colliders.
description: 20 pages + references, 6 figures
title: Existenzgründung Praxis – spielerisch gegen Niederlassungsbarrieren (ExPrax)
Creators: name: Kohlhaas, A.
name: Götz, K.
name: Szecsenyi, J.
name: Högsdal, N.
name: Steinhäuser, J.
Publisher: name: German Medical Science GMS Publishing House
Year: 2015
Subjects: subject: Betriebswirtschaft im Gesundheitswesen
subject: Spiel als didaktisches Konzept zur Wissensvermittlung
subject: Überwindung von Niederlassungsbarrieren
subject: 610 Medical sciences; Medicine

description: Hintergrund: Ca. 25% der Hausärzte in Deutschland sind über 60 Jahre alt und werden daher in den nächsten Jahren Nachfolger für ihre Praxen suchen. Nachrückende Ärzte werden auch durch das empfundene unternehmerische Risiko abgeschreckt. An dieser Stelle setzt das[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 49. Kongress für Allgemeinmedizin und Familienmedizin
Aceite de semillas de Cannabis sativa L.: sus aplicaciones y regulación en Colombia y el mundo
Creators: name: Vanegas Garcés, Alfonso José
Publisher: name: Universidad de Cartagena
Year: 2020
Subjects: subject: Cannabis
subject: Marihuana
subject: Microbiología
subject: Farmacéutica
subject: Medicina alternativa

description: Cannabis sativa L., es una planta originaria de China, Irán y el norte de la India. Esta planta es dioica, anual, erecta y ramificada con hojas segmentadas. Tanto la planta femenina como la masculina dan flores, las semillas oleaginosas se obtienen a partir de las plantas femeninas. El aceite extraído de estas semillas por diferentes métodos de extracción (prensado en frío, solvente y CO2 supercrítico), puede ser utilizado en la industria farmacéutica (como fuente de cannabinoides para el desarrollo de medicamentos), nutracéutica (como fuente de ácidos grasos esenciales con propiedades nutricionales) y cosmética (para aprovechar las propiedades emolientes, fotoprotectoras e hidratantes sobre la piel), con el fin de aprovechar las propiedades terapéuticas, cosméticas y nutricionales de una amplia gama de compuestos incluyendo cannabinoides, terpenoides, compuestos fenólicos y ácidos grasos esenciales. Sin embargo, actualmente el uso del cannabis medicinal posee medidas de fiscalización a nivel mundial, por lo tanto, sigue siento una sustancia controlada. De este modo, legalmente el uso medicinal del cannabis varía según el país y la región. Esta revisión recopila información reciente del estado de arte sobre los métodos de extracción, el uso medicinal, cosmético y como suplemento dietario del aceite de las semillas de Cannabis sativa, los productos farmacéuticos, cosméticos y suplementos dietarios que contienen el aceite o compuestos aislados del mismo y la legislación referente al uso del cannabis medicinal a nivel global y en Colombia
The ASAS-SN Catalog of Variable Stars X: Discovery of 116,000 New Variable Stars Using g-band Photometry
Creators: name: Christy, C. T.
name: Jayasinghe, T.
name: Stanek, K. Z.
name: Kochanek, C. S.
name: Thompson, T. A.
name: Shappee, B. J.
name: Holoien, T. W. -S.
name: Prieto, J. L.
name: Dong, Subo
name: Giles, W.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The All-Sky Automated Survey for Supernovae (ASAS-SN) is the first optical survey to monitor the entire sky, currently with a cadence of $\lesssim 24$ hours down to $g \lesssim 18.5$ mag. ASAS-SN has routinely operated since 2013, collecting $\sim$ 2,000 to over 7,500 epochs of $V$ and $g-$band observations per field to date. This work illustrates the first analysis of ASAS-SN's newer, deeper, higher cadence $g-$band data. From an input source list of ${\sim}55$ million isolated sources with $g<18$~mag, we identified $1.5\times10^6$ variable star candidates using a random forest classifier trained on features derived from $\textit{Gaia}$, 2MASS, and AllWISE. Using ASAS-SN $g-$band light curves, and an updated random forest classifier augmented with data from Citizen ASAS-SN, we classified the candidate variables into 8 broad variability types. We present a catalog of ${\sim}116,000$ new variable stars with high classification probabilities, including ${\sim}111,000$ periodic variables and ${\sim}5,000$ irregular variables. We also recovered ${\sim}263,000$ known variable stars.
description: 18 pages, 21 figures, 1 table. Submitted to MNRAS. The g-band catalog of variables and their light curves are available here: https://drive.google.com/drive/folders/1gxcIokRsw1eyPmbPZ0-C8blfRGItSOAu
title: Harninkontinenz bei Frauen – (k)ein Thema für Hausärztinnen/Hausärzte?
Creators: name: Elsner, S.
name: Jürgensen, M.
name: Faust, E.
name: Kold, M.L.
name: Schreiber Pedersen, L.
name: Lückert, J.
name: Niesel, A.
name: Rudnicki, P.M.
name: Waldmann, A.
Publisher: name: German Medical Science GMS Publishing House
Year: 2015
Subjects: subject: Gesprächsbarrieren
subject: Harninkontinenz
subject: Unterversorgung
subject: 610 Medical sciences; Medicine

description: Hintergrund: Viele Frauen sind zeitweise oder dauerhaft von Harninkontinenz betroffen und fühlen sich dadurch in ihrer Lebensqualität beeinträchtigt. Die Vermutung liegt nahe, dass dieses Thema in Hausarztpraxen alltäglich ist. Studienergebnisse zeigen, dass dem nicht so ist. [zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 49. Kongress für Allgemeinmedizin und Familienmedizin
The Effect Of Human Resource Management Practices On Perceived Organizational Performance: The Case Of Ethiopian Airlines
Creators: name: Tedla, Serkalem
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: This research has been done to examine The Effects of Human Resource Management practices on Perceived Organizational Performance in Ethiopian Airlines. Based on prior researches a structured questionnaire was developed. A total of 324 employees participated in the study and the data were analyzed using descriptive and inferential statistics. The research findings revealed that recruitment and selection, training and development, compensation and reward, performance appraisal and career management were all positively and significantly correlated with organizational performance with the range of r=.540 to r=.740. The multiple regression result indicated that recruitment and selection, training and development, compensation and reward and career management, have significant and positive effect on organizational performance. However, performance appraisal practice was the factor with insignificant effect on organizational performance as it was explained by significance level p>0.05. Career management was the most contributing factor in predicting organizational performance followed by recruitment and selection, training and development, compensation and reward in their respective order. Generally, based on the findings of this study, it can be concluded that Ethiopian Airlines should focus on the practices of recruitment and selection, training and development, compensation and reward and career management which can improve organizational performance and also should give due attention to motivate its staffs by developing fair and objective performance appraisal system and adjusting compensation and reward system.
Multi-level Simulation of Internet of Things on Smart Territories
Creators: name: D'Angelo, Gabriele
name: Ferretti, Stefano
name: Ghini, Vittorio
Publisher: name: arXiv
Year: 2016
Subjects: subject: Performance (cs.PF)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Multiagent Systems (cs.MA)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: In this paper, a methodology is presented and employed for simulating the Internet of Things (IoT). The requirement for scalability, due to the possibly huge amount of involved sensors and devices, and the heterogeneous scenarios that might occur, impose resorting to sophisticated modeling and simulation techniques. In particular, multi-level simulation is regarded as a main framework that allows simulating large-scale IoT environments while keeping high levels of detail, when it is needed. We consider a use case based on the deployment of smart services in decentralized territories. A two level simulator is employed, which is based on a coarse agent-based, adaptive parallel and distributed simulation approach to model the general life of simulated entities. However, when needed a finer grained simulator (based on OMNeT++) is triggered on a restricted portion of the simulated area, which allows considering all issues concerned with wireless communications. Based on this use case, it is confirmed that the ad-hoc wireless networking technologies do represent a principle tool to deploy smart services over decentralized countrysides. Moreover, the performance evaluation confirms the viability of utilizing multi-level simulation for simulating large scale IoT environments.
description: Simulation Modelling Practice and Theory, Elsevier, vol. 73 (April 2017)
Informe de la gestión realizada desde trabajo social en el área de educación ambiental de la corporación autónoma regional del canal del dique, Cardique, en el marco del proyecto de ecoturismo, año 2008
Creators: name: Méndez Isaza, Vivian
Publisher: name: Universidad de Cartagena
Year: 2008
Subjects: subject: Educación ambiental
subject: Impacto ambiental
subject: Medio ambiente - Educación

description: En el informe se presenta, en términos generales, los aspectos más sobresalientes de la labor desempeñada durante el tiempo que se dedicó a la entidad que abrió sus puertas para poder realizar los aportes correspondientes desde nuestra disciplina. En ese sentido, el informe contiene, en primera instancia, la valoración académica de nuestro programa de trabajo social al interior de la facultada de ciencias sociales y educación de la universidad de cartagena, y el reconocimiento institucional de la corporación Cardique, que incluye la presentación de las características de la entidad, sus programas y proyectos, las salidas diseñadas para atender las problemáticas encontradas durante la etapa de reconocimiento de los agentes sociales, y la evaluación del proceso así como los logros obtenidos. En el espacio que sigue se hace referencia a la elaboración de una propuesta de gestión que rescata la experiencia profesional y que pone en conocimiento de los interesados una forma de intervención específica que puede ser contemplada para desarrollarse en instituciones sociales, comunidades o poblaciones con características similares.
Monitoring And Evaluation Tools Affecting Project Performance: A Case Of Addis Ababa Network Of People Living With Hiv/Aids Associations (ANOPA+)
Creators: name: Getachew, Sisay
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: The general objective of this Project work was to assess the monitoring and evaluation factors affecting project performance in Addis Ababa Network of People living with HIV Positives Associations (ANOPA+). For the achievement of its objective, the research employed purposive sampling techniques. Questionnaire was used as the major data collection tool. Focus group discussion, observation, key informant interview and review of project records were also used to collect data. The study employed descriptive and inferential statistics to analyze data. The research found out that, the practices of log frame and baseline survey were rated below the average of three. Stakeholder's involvement in setting indicators, deployment of resources for the M&E, communication of M&E findings and use of the finding for future programming were rated below the average of three impacting project performances. In correlation analysis, it was found out that Log frame, indicators, baseline, M&E plan and data collection and reporting have correlation coefficient of 0.713, 0.588, 0349, 696 and 0.804 respectively. Except baseline survey, all the independent variables have strong relationship on the dependent variable of project performance. In addition, multiple regression analysis revealed that keeping all the other independent variables constant for a unit percentage increase in log frame, indicators, baseline survey, M&E plan and data collection reporting practice have an increase of performance by 30%, 16.7%, 18.4%, 13.4% and 54.4% respectively. The study recommended that, ANOPA+ has to institutionalize log frame approach, baseline survey, setting indictors in participatory manner as to improve project performances. ANOPA+ has to also facilitate trainings, deploy adequate human, financial resources and allocate proper schedule as part of the M&E plan to undertake M&E activities properly. ANOPA+ has to put in place communication systems capable of sharing M&E results and findings to the stakeholders and use of these M&E results and findings to designing future programmes as part of learning processes.
Fill and dump measurement of the neutron lifetime using an asymmetric magneto-gravitational trap
Creators: name: Cude-Woods, C.
name: Gonzalez, F. M.
name: Fries, E. M.
name: Bailey, T.
name: Blatnik, M.
name: Callahan, N. B.
name: Choi, J. H.
name: Clayton, S. M.
name: Currie, S. A.
name: Dawid, M.
name: Filippone, B. W.
name: Fox, W.
name: Geltenbort, P.
name: George, E.
name: Hayen, L.
name: Hickerson, K. P.
name: Hoffbauer, M. A.
name: Hoffman, K.
name: Holley, A. T.
name: Ito, T. M.
name: Komives, A.
name: Liu, C. -Y.
name: Makela, M.
name: Morris, C. L.
name: Musedinovic, R.
name: O'Shaughnessy, C.
name: Pattie,, R. W.
name: Ramsey, J.
name: Salvat, D. J.
name: Saunders, A.
name: Sharapov, 5 E. I.
name: Slutsky, S.
name: Su, V.
name: Sun, X.
name: Swank, C.
name: Tang, Z.
name: Uhrich, W.
name: Vanderwerp, J.
name: Walstrom, P.
name: Wang, Z.
name: Wei, W.
name: Young, A. R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The past two decades have yielded several new measurements and reanalyses of older measurements of the neutron lifetime. These have led to a 4.4 standard deviation discrepancy between the most precise measurements of the neutron decay rate producing protons in cold neutron beams and the lifetime measured in neutron storage experiments. Measurements using different techniques are important for investigating whether there are unidentified systematic effects in any of the measurements. In this paper we report a new measurement using the Los Alamos asymmetric magneto-gravitational trap where the surviving neutrons are counted external to the trap using the fill and dump method. The new measurement gives a free neutron lifetime of . Although this measurement is not as precise, it is in statistical agreement with previous results using in situ counting in the same apparatus.
Structural and functional studies on members of the Aldo-Keto reductase family: Identifying molecular determinants responsible for substrate selectivity and inhibitor potency
Creators: name: Dhagat, Urmi
Publisher: name: Monash University
Year: 2017
Subjects: Uncategorized

description: The aldo-keto reductase (AKR) superfamily encompasses more than 150 enzymes that catalyse the NADP(H)-dependent reduction of several endogenous and xenobiotic aldehydes and ketones. Human AKRs have been implicated in the development of diabetes, cancer chemotherapeutic drug resistance, tobacco carcinogenesis and other hormone-dependent cancers. As such, there is a growing need to understand the molecular basis for their involvement in disease progression and develop selective inhibitors that could be used as therapeutics. The research project presented in this thesis originates from the need to study the tertiary structures of new members of the AKR family and correlate their unique structural features to enzyme function. Three members of the AKR family, namely AKR1C1, AKR1C21 and AKR1B14 were investigated in this thesis. Human AKR1C1 enzyme regulates activity of progesterone receptors by catalysing the reductive inactivation of progesterone into 20α-hydroxyprogesterone. Aberrant AKR1C1 activity has been associated with several types of cancers, end ometriosis and obesity-related metabolic disorders. In section A of this thesis, we present a new class of salicylic acid based inhibitors of AKR1C1 identified from high throughput virtual screening of the NCI database. These compounds were developed further into potent and selective inhibitors of AKR1C1 using a structure - based drug design approach. Section B of this thesis is dedicated to structure- function analysis of mouse AKR1C21 which is the only enzyme known to exhibit 17α-reductase activity. The role of active site residues in dictating 17α- stereospecificity of this enzyme was investigated by determining the crystal structures of AKR1C21 and its mutants. The mode of binding of substrates and inhibitors in the active site of AKR1C21 was explored through molecular modelling and docking analysis. In section C, we present the first crystal structure of rat AKR1B14 which exhibits significant prostaglandin F2α synthase activity and reduces reactive products derived from lipid peroxidation and glycation with lower Km values than other members of the AKR1B subfamily. Residues involved in binding of coenzyme, bile-acid activator and aldose reductase inhibitors were investigated through molecular modelling and docking analysis. The overall aim of this study was to characterise the mode of binding of substrates and inhibitors within the active site of these enzymes in order to ascertain the role of active site residues in dictating substrate selectivity and inhibitor potency. The structural information obtained from solving the crystal structures of these enzymes was used for high throughput database screening to identify new ligands that could be developed into potent drug-like inhibitors with potential for therapeutic use through a structure based drug design process.
title: Human Tau transgenic mice as a model for granulovacuolar degeneration
Creators: name: Köhler, Christioph
name: Morcinek, Kerstin
name: Dinekov, Maja
Publisher: name: German Medical Science GMS Publishing House
Year: 2015
Subjects: subject: 610 Medical sciences; Medicine

description: Introduction: Granulovacuolar degeneration (GVD) is a neurodegenerative change that appears as granule-containing vacuoles in the cytoplasm of neurons. GVD usually occurs together with neurofibrillary tangles that consist of abnormal fibrils of the microtubule-associated protein tau. Severe GVD in the[for full text, please go to the a.m. URL]
description: 60th Annual Meeting of the German Society for Neuropathology and Neuroanatomy (DGNN)
Plasma Image Classification Using Cosine Similarity Constrained CNN
Creators: name: Falato, Michael J.
name: Wolfe, Bradley T.
name: Natan, Tali M.
name: Zhang, Xinhua
name: Marshall, Ryan S.
name: Zhou, Yi
name: Bellan, Paul M.
name: Wang, Zhehui
Publisher: name: arXiv
Year: 2022
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Plasma jets are widely investigated both in the laboratory and in nature. Astrophysical objects such as black holes, active galactic nuclei, and young stellar objects commonly emit plasma jets in various forms. With the availability of data from plasma jet experiments resembling astrophysical plasma jets, classification of such data would potentially aid in investigating not only the underlying physics of the experiments but the study of astrophysical jets. In this work we use deep learning to process all of the laboratory plasma images from the Caltech Spheromak Experiment spanning two decades. We found that cosine similarity can aid in feature selection, classify images through comparison of feature vector direction, and be used as a loss function for the training of AlexNet for plasma image classification. We also develop a simple vector direction comparison algorithm for binary and multi-class classification. Using our algorithm we demonstrate 93% accurate binary classification to distinguish unstable columns from stable columns and 92% accurate five-way classification of a small, labeled data set which includes three classes corresponding to varying levels of kink instability.
description: 16 pages, 12 figures, For submission to Journal of Plasma Physics
Bilinear spaces over a fixed field are simple unstable
Creators: name: Kamsma, Mark
Publisher: name: arXiv
Year: 2022
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03C45 (Primary) 03C10 (Secondary)

description: We study the model theory of vector spaces with a bilinear form over a fixed field. For finite fields this can be, and has been, done in the classical framework of full first-order logic. For infinite fields we need different logical frameworks. First we take a category-theoretic approach, which requires very little set-up. We show that linear independence forms a simple unstable independence relation. With some more work we then show that we can also work in the framework of positive logic, which is much more powerful than the category-theoretic approach and much closer to the classical framework of full first-order logic. We fully characterise the existentially closed models of the arising positive theory. Using the independence relation from before we conclude that the theory is simple unstable, in the sense that dividing has local character but there are many distinct types. We also provide positive version of what is commonly known as the Ryll-Nardzewski theorem for $ω$-categorical theories in full first-order logic, from which we conclude that bilinear spaces over a countable field are $ω$-categorical.
description: 22 pages
Academic Achievement Between the Cognitive Abilities and the EmotionalCompetencies of the Learner
Creators: name: ABBOU, Youssef
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 520102
subject: Educational psychology
classificationCode: 520499
subject: Cognitive and computational psychology not elsewhere classified

description: Exploring the processes of learning and acquiring knowledge from within the research in the psychology of intelligence, has been represents a kind of integrated dynamic system in which the learner's knowledge and mental competences interact with his various emotional and affective states. After the interest of psychologists was focused on exploring cognitive functions, and determining its role in the learner’ mental functioning, in order to improve his cognitive performance and raise his academic achievement; recognition has recently begun of the decisive and influential role played by emotional factors, in improving the learner's cognitive processes and improving his school learning. Accordingly, this article aims to highlight the development of scientific research with regard to discover the manifestations of the relationship between the components and characteristics of mental functioning and academic achievement, through a critical evaluation reading of the results and conclusions of a group of empirical studies, in various cultural and educational contexts at the global level.
Limitations of the intrinsic cut-off frequency to correctly quantify the speed of nanoscale transistors
Creators: name: Zhan, Zhen
name: Colomés, Enrique
name: Oriols, Xavier
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The definition of the intrinsic cut-off frequency ($f_T$) based on the current gain equals to one (0 dB) is critically analyzed. A condition for the validity of the quasi-static estimation of $f_T$ is established in terms of the temporal variations of the electric charge and electric flux on the drain, source and gate terminals. Due to the displacement current, an electron traversing the channel length generates a current pulse of finite temporal width. For electron devices where the intrinsic delay time of the current after a transient perturbation is comparable to such width, the displacement currents cannot be neglected and the quasi-static approximation becomes inaccurate. We provide numerical results for some ballistic transistors where the estimation of $f_T$ under the quasi-static approximation can be one order of magnitude larger than predictions obtained from a time-dependent numerical simulations of the intrinsic delay time (including particle and displacement currents). In other ballistic transistors, we show that the gate current phasor can be smaller than the drain one at all frequencies, giving no finite value for $f_T$.
description: 7 pages, 10 figures
Estrategia de Bienestar Universitario para el Doctorado en Ciencias de la Educación RUDECOLOMBIA de la Universidad de Cartagena. Contextualización de la pobreza en la Ciudad de Cartagena.
Creators: name: Morales Espinosa, Lorcy
name: Castillo De La Torre, Marelis
Publisher: name: Universidad de Cartagena
Year: 2010
Subjects: Trabajo social
Bienestar estudiantil
Trabajo social - Casos
Pobreza

description: Tesis (Trabajo Social) - - Universidad de Cartagena. Facultad de ciencias sociales y educación. Programa de trabajo social, 2010
description: Las prácticas profesionales son el último eslabón en el pregrado universitario, lo que le implica al estudiante aportara la institución, dependencia o proyecto donde esté vinculado los conocimientos aprendidos durante el período de formación y a su vez la obtención de nuevos aprendizajes que enriquezcan su perfil profesional.Los conocimientos adquiridos se pueden aplicar en las diferentes áreas de intervención como lo son: derechos humanos, desplazamiento y conflicto, desarrollo local, educación, familia infancia y género, gestión empresarial, ecología y gestión ambiental y proyectos universitarios; en este último se encuentra el programa del Doctorado en Ciencias de la Educación RUDECOLOMBIA como opción para desarrollar las prácticas profesionales de trabajo social. Desde esta dependencia se trabajó en dos frentes bien delimitados: una enmarcada en la consolidación de una estrategia de bienestar para los estudiantes del doctorado, y otra, enfocada al acompañamiento como miembro del Semillero de del grupo de Investigación Territorios Vulnerables y desarrollo Humano Sostenible - uno de los grupos de investigación que soporta el programa de doctorado -, en el proyecto Dimensiones Psicosociales de la Pobreza. Estudio transcultural, casos México, Colombia, Argentina, Chile y Uruguay.
title: Role of Lipocalin 2 in virally induced neuroinflammatory processes by the use of BDV-infected TNF-transgenic and TNF receptor k.o.-mice
Creators: name: Vienenkoetter, Julia
name: Eisel, Ulrich L. M.
name: Culmsee, Carsten
name: Hirz, Manuela
name: Herden, Christiane
Publisher: name: German Medical Science GMS Publishing House
Year: 2015
Subjects: subject: 610 Medical sciences; Medicine

description: Objective:Lipocalin 2 (Lcn 2) acts as a cytokine involved in the regulation of neuroinflammatory processes. It is supposed to promote classical proinflammatory activation of astrocytes and microglia via a TNFα- and NFκB-dependent TNFR1 mediated pathway [ref:1], [ref:2].[for full text, please go to the a.m. URL]
description: 60th Annual Meeting of the German Society for Neuropathology and Neuroanatomy (DGNN)
Recent Developments in Theories of Inhomogeneous and Anisotropic Turbulence
Creators: name: Marston, J. B.
name: Tobias, S. M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: Understanding inhomogeneous and anisotropic fluid flows require mathematical and computational tools that are tailored to such flows and distinct from methods used to understand the canonical problem of homogeneous and isotropic turbulence. We review some recent developments in the theory of inhomogeneous and anisotropic turbulence, placing special emphasis on several kinds of quasilinear approximations and their corresponding statistical formulations. Aspects of quasilinear theory that have received insufficient attention in the literature are discussed, and open questions are framed.
description: Some added material and references and corrected typos. To appear in Annual Reviews of Fluid Mechanics. 29 pages, 7 figures. When citing this paper, please use the following: J. B. Marston and S. M. Tobias. 2022. "Recent Developments in Theories of Inhomogeneous and Anisotropic Turbulence," Ann. Rev. Fluid Mech. Vol. 55. Accepted. http://doi.org/10.1146/annurev-fluid-120720-031006
Classification from Positive and Biased Negative Data with Skewed Labeled Posterior Probability
Creators: name: Watanabe, Shotaro
name: Matsui, Hidetoshi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Methodology (stat.ME)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: The binary classification problem has a situation where only biased data are observed in one of the classes. In this paper, we propose a new method to approach the positive and biased negative (PbN) classification problem, which is a weakly supervised learning method to learn a binary classifier from positive data and negative data with biased observations. We incorporate a method to correct the negative impact due to skewed confidence, which represents the posterior probability that the observed data are positive. This reduces the distortion of the posterior probability that the data are labeled, which is necessary for the empirical risk minimization of the PbN classification problem. We verified the effectiveness of the proposed method by numerical experiments and real data analysis.
description: 14 pages, 1 figure
A computationally efficient implementation of continuum dislocation dynamics: Formulation and application to ultrafine-grained Mg polycrystals
Creators: name: Luo, Xi
name: Zaiser, Michael
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Continuum dislocation dynamics (CDD) represents the evolution of systems of curved and connected dislocation lines in terms of density-like field variables which include the volume density of loops (or 'curvature density') as an additional field. Since dislocation curvature represents a spatial derivative of the underlying discrete dislocation density tensor, the curvature field evolution equation of necessity contains numerically inconvenient higher-order derivatives of the density fields. We propose a simple approximation to express curvature in terms of density fields, and demonstrate its application to a benchmark problem in deformation of Mg polycrystals.
Diagnóstico del sector comercio, base para el rediseño de formación profesional en el Sena
Creators: name: Torres Iglesias, Rosalba
name: Viera Bonilla, Luz Marina
Publisher: name: Universidad de Cartagena
Year: 1986
Subjects: Sena - Formación profesional
Educación superior

description: Tesis (Administrador de Empresas).--Universidad de Cartagena. Facultad de Ciencias Económicas. Programa de Administración de Empresas, 1986
description: El presente estudio pretende brindar información que sirva de base para establecer programas sólidos de capacitación en el sector comercio.
Deliverable 3.3: Product Circular Design Decisions Framework overview and Technical  Description
Creators: name: Giovanni, Formentini
name: Devarajan, Ramanujan
Publisher: name: Zenodo
Year: 2024

description: The task focuses on understanding how to use the indicators and outputs provided from T3.1 and T3.2 for purposes of Circular product design decisions for CircThread use case 5. The work is based on the existing background tool VESPER. The aim of VESPER is to provide multi-criteria trade-off analysis for product design using computer guided product alternatives scenario generation, so as to enable analysis of different circular economy design improvements also on other sustainability domains and manufacturing implications. VESPER (AAR) is a visual analytics-based tool for exploration of similarity and performance metrics in computer-aided design (CAD) repositories. In this task, the data schema used in VESPER will be extended towards computing product component design alternatives that extend product lifespan and make products easier to disassemble. The task also developed novel Design for Disassembly methodology that, together with VESPER, aid selection and/or generation of more circular & sustainable alternatives from repositories.