cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Is this GitHub Project Maintained? Measuring the Level of Maintenance Activity of Open-Source Projects
Creators: name: Coelho, Jailton
name: Valente, Marco Tulio
name: Milen, Luciano
name: Silva, Luciana L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Context: GitHub hosts an impressive number of high-quality OSS projects. However, selecting "the right tool for the job" is a challenging task, because we do not have precise information about those high-quality projects. Objective: In this paper, we propose a data-driven approach to measure the level of maintenance activity of GitHub projects. Our goal is to alert users about the risks of using unmaintained projects and possibly motivate other developers to assume the maintenance of such projects. Method: We train machine learning models to define a metric to express the level of maintenance activity of GitHub projects. Next, we analyze the historical evolution of 2,927 active projects in the time frame of one year. Results: From 2,927 active projects, 16% become unmaintained in the interval of one year. We also found that Objective-C projects tend to have lower maintenance activity than projects implemented in other languages. Finally, software tools---such as compilers and editors---have the highest maintenance activity over time. Conclusions: A metric about the level of maintenance activity of GitHub projects can help developers to select open source projects.
description: arXiv admin note: substantial text overlap with arXiv:1809.04041
Computational Complexity of Synchronization under Regular Commutative Constraints
Creators: name: Hoffmann, Stefan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Formal Languages and Automata Theory (cs.FL)
subject: Computational Complexity (cs.CC)
subject: FOS: Computer and information sciences
subject: F.4.3; F.1.3
subject: 68Q45 (Primary) 68Q19 (Secondary)

description: Here we study the computational complexity of the constrained synchronization problem for the class of regular commutative constraint languages. Utilizing a vector representation of regular commutative constraint languages, we give a full classification of the computational complexity of the constraint synchronization problem. Depending on the constraint language, our problem becomes PSPACE-complete, NP-complete or polynomial time solvable. In addition, we derive a polynomial time decision procedure for the complexity of the constraint synchronization problem, given some constraint automaton accepting a commutative language as input.
description: Published in COCOON 2020 (The 26th International Computing and Combinatorics Conference); 2nd version is update of the published version and 1st version; both contain a minor error, the assumption of maximality in the NP-c and PSPACE-c results (propositions 5 & 6) is missing, and of incomparability of the vectors in main theorem; fixed in this version. See (new) discussion after main theorem
Additional file 2 of PDK1 regulates the survival of the developing cortical interneurons
Creators: name: Yongjie Wei
name: Xiaoning Han
name: Chunjie Zhao
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Cell Biology
subject: Neuroscience
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 2. Raw data supplementary materials
Numerical integration of the Teukolsky Equation in the time domain
Creators: name: Pazos-Avalos, Enrique
name: Lousto, Carlos O.
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present a fourth order convergent (2+1) numerical code to solve the Teukolsky equation in the time domain. Our approach is to rewrite the Teukolsky equation as a system of first order differential equations. In this way we get a system that has the form of an advection equation. This is used in combination with a series expansion of the solution in powers of time. To obtain a fourth order scheme we kept terms up to fourth derivative in time and use the advection-like system of differential equations to substitute the temporal derivatives by spatial derivatives. A local stability study leads to a Courant factor of 1.5 for the nonrotating case. This scheme is used to evolve gravitational perturbations in Schwarzschild and Kerr backgrounds. Our numerical method proved to be fourth order convergent in r* and theta directions. The correct power-law tail, ~1/t^{2\ell+3}, for general initial data, and ~1/t^{2\ell+4}, for time symmetric data, was found in the simulations where the duration in time of the tail phase was long enough. We verified that it is crucial to resolve accurately the angular dependence of the mode at late times in order to obtain these values of the exponents in the power-law decay. In other cases, when the decay was too fast and round-off error was reached before a tail was developed, the quasinormal modes frequencies provided a test to determine the validity of our code.
description: 19 pages, 17 figures
Magnonic bending, phase shifting and interferometry in a 2D reconfigurable nanodisk crystal
Creators: name: Stenning, K. D.
name: Gartside, J. C.
name: Dion, T.
name: Vanstone, A.
name: Arroo, D. M.
name: Branford, W. R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Strongly-interacting nanomagnetic systems are pivotal across next-generation technologies including reconfigurable magnonics and neuromorphic computation. Controlling magnetisation state and local coupling between neighbouring nanoelements allows vast reconfigurable functionality and a host of associated functionalities. However, existing designs typically suffer from an inability to tailor inter-element coupling post-fabrication and nanoelements restricted to a pair of Ising-like magnetisation states. Here, we propose a new class of reconfigurable magnonic crystal incorporating nanodisks as the functional element. Magnetic nanodisks are crucially bistable in macrospin and vortex states, allowing inter-element coupling to be selectively activated (macrospin) or deactivated (vortex). Through microstate engineering, we leverage the distinct coupling behaviours and magnonic band structures of bistable nanodisks to achieve reprogrammable magnonic waveguiding, bending, gating and phase-shifting across a 2D network. The potential of nanodisk-based magnonics for wave-based computation is demonstrated via an all-magnon interferometer exhibiting XNOR logic functionality. Local microstate control is achieved here via topological magnetic writing using a magnetic force microscope tip.
description: 15 pages, 12 figures
Additional file 1 of Adaptation and validation of the Berlin questionnaire of competence in evidence-based dentistry for dental students: a pilot study
Creators: name: Imorde, Laura
name: Möltner, Andreas
name: Runschke, Maren
name: Weberschock, Tobias
name: Rüttermann, Stefan
name: Gerhardt-Szép, Susanne
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 1. Berlin Questionnaire of Dental Competence in Evidence-based Dentistry (German).
Supplementary materials for Tracking the international spread of SARS-CoV-2 lineages B.1.1.7 and B.1.351/501Y-V2
Creators: name: O'Toole, Áine
Publisher: name: Zenodo
Year: 2021

description: Full acknowledgements for Tracking the international spread of SARS-CoV-2 lineages B.1.1.7 and B.1.351/501Y-V2
Exact axisymmetric interaction of phoretically active Janus particles
Creators: name: Nasouri, Babak
name: Golestanian, Ramin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We study the axisymmetric interaction of two chemically active Janus particles. By relying on the linearity of the field equations and symmetry arguments, we derive a generic solution for the relative velocity of the particles. We show that regardless of the chemical properties of the system, the relative velocity can be written as a linear summation of geometrical functions which only depend on the gap size between the particles. We evaluate these functions via an exact approach which accounts for the full chemical and hydrodynamic interactions. Using the obtained solution, we expose the role of each compartment in the relative motion, and also discuss the contribution of different interactions. We then show that the dynamical system describing the relative motion of two Janus particles can have up to three fixed points. These fixed points can be stable or unstable, indicating that a system of two Janus particles can exhibit a variety of nontrivial behaviour depending on their initial gap size, and their chemical properties. We also look at the specific case of Janus particles in which one compartment is inert, and present regime diagrams for their relative behaviour in the activity-mobility parameter space.
La cultura organizacional y la efectividad de los programas de maestría
Creators: name: Escalante Gonmez, Eduardo
name: Escalante Gonmez, Eduardo
Publisher: name: Unknown
Year: 2009
Subjects: Teaching/Communication/Extension/Profession

description: La finalidad de este estudio es investigar algunos factores de la organización que contribuyen al éxito de los alumnos de maestría. Se emplea una investigación basada en cuestionarios aplicados a alumnos en su etapa final de la tesis, en orden a estudiar la relación entre la orientación cultural de organización y la efectividad de los programas de maestría. El estudio reveló que la cultura de Clan se relaciona considerablemente con la efectividad de los programas de maestría. Se formulan algunas sugerencias a partir de los hallazgos para la organización y para futuras investigaciones.
HOLISMOKES -- III. Achromatic Phase of Strongly Lensed Type Ia Supernovae
Creators: name: Huber, S.
name: Suyu, S. H.
name: Noebauer, U. M.
name: Chan, J. H. H.
name: Kromer, M.
name: Sim, S. A.
name: Sluse, D.
name: Taubenberger, S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: To use strongly lensed Type Ia supernovae (LSNe Ia) for cosmology, a time-delay measurement between the multiple supernova (SN) images is necessary. The sharp rise and decline of SN Ia light curves make them promising for measuring time delays, but microlensing can distort these light curves and therefore add large uncertainties to the measurements. An alternative approach is to use color curves where uncertainties due to microlensing are significantly reduced for a certain period of time known as the achromatic phase. In this work, we investigate in detail the achromatic phase, testing four different SN Ia models with various microlensing configurations. We find on average an achromatic phase of around three rest-frame weeks or longer for most color curves but the spread in the duration of the achromatic phase (due to different microlensing maps and filter combinations) is quite large and an achromatic phase of just a few days is also possible. Furthermore, the achromatic phase is longer for smoother microlensing maps, lower macro-magnifications and larger mean Einstein radii of microlenses. From our investigations, we do not find a strong dependency on the model or on asymmetries in the SN ejecta. Further, we find that three independent LSST color curves exhibit features such as extreme points or turning points within the achromatic phase, which make them promising for time-delay measurements. These curves contain combinations of rest-frame bands $u$, $g$, $r$, and $i$ and to observe them for typical LSN Ia redshifts, it would be ideal to cover (observer-frame) filters $r$, $i$, $z$, $y$, $J$, and $H$.
description: 17 pages, 15 figures; accepted for publication in A&A
title: Rigidity enhanced bridging tetrazoles for iron (II) spin crossover polymers
Creators: name: Knoll, Christian
Publisher: name: TU Wien
Year: 2015
Subjects: subject: iron(II)
subject: spin crossover
subject: tetrazole
subject: rigid ligands

description: Die Entdeckung bistabiler Verbindungen, die eine Änderung in ihrer elektronischen Orbitalbesetzung durch äußere Einflüsse, wie Temperatur oder Druck, eröffnete im Jahr 1931 ein neues Forschungsfeld in der Koordinationschemie. Ziel des daraufhin folgenden Forschungsaufwandes war eine technologische Anwendung des sogenannten Spin Übergangs Effektes (SCO). Ansatzpunkte dabei sind die einhergehenden Änderungen im magnetischen Moment, der dielektrischen Konstante, der Farbe, der Bindungslänge oder ähnlichem. Ein wichtiges Kriterium für derartige Verbindungen, die als Speicher oder Sensormaterialien auf Spin Übergangsbasis zum Einsatz kommen könnten, ist die Kooperativität zwischen den Metallzentren, um einen abrupten Spin Übergang zu ermöglichen. In der hier präsentierten Arbeit wurden zwei Typen neuartiger Spin Übergangs Polymere auf Eisen(II) Basis, mit dem Fokus auf der Erhöhung der Starrheit, synthetisiert und mit verschiedenen unabhängigen analytischen Techniken charakterisiert. Auch der Einfluss diverser schwach koordinierender Anionen und von verschiedenen Lösungsmitteln wurde untersucht. Zur besseren Interpretation experimenteller spektroskopischer Daten wurden quantenchemische Rechnungen durchgeführt. Das Ziel der Arbeit wurde erreicht, da einige der neu hergestellten Verbindungen einen sehr abrupten und vollständigen Spin Übergang zeigen.
description: The discovery of bi stable compounds in 1931 showing a transition in their electronic orbital-s population upon changes of external stimuli like temperature or pressure opened a new field of interest in coordination chemistry. Many research efforts were undertaken to utilize the so called spin crossover effect (SCO) in a technological application. The changes of the magnetic moment, dielectric constant, color, bond length, etc. of the system could enable interesting new technological perspectives. An important feature of such compounds for a potential use in memory or sensing devices based on the spin crossover effect is cooperativity between the metal centers to enable an abrupt spin transition. Within the presented work two different kinds of new spin crossover polymers with iron(II) centers focusing on enhancement of their rigidity, were synthesized and characterized with different independent analytical techniques. Also the influence of various weak coordinating anions and different solvents was investigated. For an in depth interpretation of the experimental results from spectroscopy quantum chemical calculations were performed. The aim of the work could be accomplished, as some of the new synthesized compounds show very abrupt and complete spin transition behavior.
Análisis Coyuntural de la Industria Maquiladora de Exportación del Estado de México
Creators: name: Gonzalez Mora, Melvin J
name: Trivez, Javier
name: Reyes Terron, Angel M
name: Gonzalez Mora, Melvin J
name: Trivez, Javier
name: Reyes Terron, Angel M
Publisher: name: Unknown
Year: 2009
Subjects: subject: Crop Production/Industries
subject: análisis coyuntural
subject: extracción señales
subject: modelos ARIMA.

description: El objetivo de este artículo es el análisis de la situación actual y de las perspectivas a corto y mediano plazos de la industria maquiladora de exportación en el Estado de México. Se trata de efectuar un análisis de coyuntura económica cuantitativa, combinando convenientemente los elementos necesarios para ello, esto es, la base empírica (información estadística relevante en forma de series temporales mensuales del valor agregado de exportación cobrado por el servicio de maquila –VAECSM– el Estado de México) y los métodos cuantitativos (conjunto de técnicas estadístico-econométricas). Para ello se presenta una propuesta metodológica que se apoya en la modelización ARIMA univariante de las series temporales, complementada con el análisis de outliers y el efecto calendario, y la extracción de señales de dichas series, mediante el procedimiento de modelos de forma reducida. El componente tendencia-ciclo se erige como la señal adecuada para analizar la evolución subyacente de las series. A partir de la misma, y de los conceptos de crecimiento subyacente e inercia, podemos extraer las principales conclusiones respecto a la situación coyuntural del sector de la maquila del Estado de México, detallando además las mismas a nivel regional.
Fuerza de adhesión en dentina intracameral tratada con diferentes irrigantes endodónticos.
Creators: name: Vega Montonya, Joaquin
name: Vega Montonya, Joaquin
Publisher: name: Unknown
Year: 2009
Subjects: subject: Health Economics and Policy
subject: Adhesión
subject: dentina intracameral
subject: irrigantes endodónticos.

description: El objetivo de esta investigación fue, evaluar la fuerza de adhesión de tres sistemas adhesivos: Single Bond 2, One Step plus y PQ1, en dentina intracameral previamente irrigada con NaOCl 3% y NaOCl 3% + EDTA 17% combinados; por medio de la prueba microtensil. Se seleccionaron 90 terceros molares humanos libres de caries, los cuales se dividieron en tres grupos (N=30) dependiendo del irrigantes endodóntico; GI: Agua destilada (control), GII: NaOCl 3% y GIII: NaOCl 3% + EDTA 17%. Cada grupo se subdividió en tres subgrupos dependiendo del sistema adhesivo a utilizar. A los dientes se les colocó resina compuesta Z100 e inmediatamente después se seccionaron en sentido trasversal hasta obtener un espécimen por diente de la interface adhesiva, con un área aproximada de 1 mm * 1 mm. Cada espécimen fue sometido a la prueba adhesiva microtensil, en una máquina de ensayos universal (Tinius Olsen H10K-S). Los valores de la fuerza adhesiva fueron expresados en MPa y analizados con un análisis de varianza (ANOVA) de dos vías, a través de la prueba estadística Scheffé utilizando el programa estadístico KaleidaGraph 4.0. a 0.05 grados de significancia. Dentro de las condiciones en las que se realizó el presente estudio se pudo concluir que la fuerza de adhesión microtensil de los adhesivos Single Bond 2, One Step Plus y PQ1 fueron estadísticamente iguales entre sí para el mismo irrigante y cuando se trata la dentina intracameral con irrigantes endodónticos como el NaOCl 3% o NaOCl 3% + EDTA 17% en combinación; la fuerza de adhesión microtensil de los adhesivos Single Bond 2, One Step Plus y PQ1 disminuye.
Additional file 1 of Low-Intensity Guided Help Through Mindfulness (LIGHTMIND): study protocol for a randomised controlled trial comparing supported mindfulness-based cognitive therapy self-help to supported cognitive behavioural therapy self-help for adults experiencing depression
Creators: name: Strauss, Clara
name: Arbon, Amy
name: Barkham, Michael
name: Byford, Sarah
name: Crane, Rebecca
name: Visser, Richard De
name: Heslin, Margaret
name: Anna-Marie Jones
name: Jones, Fergal
name: Lea, Laura
name: Parry, Glenys
name: Rosten, Claire
name: Cavanagh, Kate
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1. SPIRIT 2013 checklist: recommended items to address in a clinical trial protocol and related documents.
Interplay of edge fracture and shear banding in complex fluids
Creators: name: Hemingway, Ewan J.
name: Fielding, Suzanne M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We explore theoretically the interplay between shear banding and edge fracture in complex fluids, by performing a detailed simulation study within two constitutive models: the Johnson-Segalman model and the Giesekus model. We consider separately parameter regimes in which the underlying constitutive curve is monotonic and non-monotonic, such that the bulk flow (in the absence of any edge effects) is respectively homogeneous and shear banded. Phase diagrams of the levels of edge disturbance and of bulk (or quasi-bulk) shear banding are mapped as a function of the surface tension of the fluid-air interface, the wetting angle where this interface meets the walls of the flow cell, and the imposed shear rate. In particular, we explore in more detail the basic result recently announced in Hemingway et al. (2018): that precursors to edge fracture can induce quasi-bulk shear banding. We also appraise analytical predictions that shear banding can induce edge fracture, Skorski and Olmsted (2011). Although a study of remarkable early insight, that study made some strong assumptions about the nature of the "base state", which we examine using direct numerical simulation. The basic prediction that shear banding can cause edge fracture remains valid, but with qualitatively modified phase boundaries.
description: 14 pages, 6 figures
An exploration in job stability
Creators: name: Brochu, Pierre
Publisher: name: University of British Columbia
Year: 2011

description: The goal of this dissertation is to document striking new job stability patterns in Canada and explore their causes. The first paper (Chapter 2) shows how to correctly apply the retention rate approach to cross sectional data. I propose two cross sectional estimators and clearly identify the conditions required for consistency. I demonstrate the bias of existing approaches for calculating standard errors, and propose an alternative method. Finally, using Current Population Survey data I show that existing approaches to estimating standard errors may lead the researcher to falsely reject the null hypothesis of no change in job stability. The second paper (Chapter 3) documents the changing job stability patterns in Canada over the 1977-2004 period. I use a retention rate approach which is less sensitive to job inflows than in-progress measures, but for which the data requirements are severe. In North America, only the Canadian Labour Force Survey satisfies these stringent data requirements. Using this rich source of data and tools developed in Chapter 2, I find that overall job stability has actually increased in Canada since the early 1990s. Two other key findings include an increase in the relative stability of women and a large increase in stability for jobs with initial tenure of less than one year. The third paper (Chapter 4) explores the causes of the new job stability patterns that were documented in Chapter 3. Results indicate that the ageing of the workforce, increased educational attainment and increased labour force attachment of women play an important role in the aggregate patterns. However, only rising educational attainment matters for newer jobs—with a large part of the increase still unexplained. I use a match quality framework to explore for changes in job stability along tenure lines. The model predicts that stricter eligibility requirements introduced in the early 1990s for the Employment Insurance program should result in better match formation, and as such, lead to an increase in stability of newer jobs. The empirical findings of this thesis are consistent with such predictions.
A note on the $\mathcal{N}=2$ super-$\mathcal{W}_3$ holographic dictionary
Creators: name: Castro, Alejandra
name: Faraggi, Alberto
name: Osorio, Israel
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: This is a long-overdue companion paper to arXiv:1512.00073. We study the relation between $sl(3|2)$ Chern-Simons supergravity on AdS$_3$ and two-dimensional CFT's with $\mathcal{N}=2$ super-$\mathcal{W}_3$ symmetry. Specifically, we carry out a complete analysis of asymptotic symmetries in a basis that makes the superconformal structure transparent, allowing us to establish the precise dictionary between currents and transformation parameters in the bulk and their boundary counterparts. We also discuss the incorporation of sources and display in full detail the corresponding holographic Ward identities. By imposing suitable hermiticity conditions on the CFT currents, we identify the superalgebra $su(2,1|1,1)$ as the appropriate real form of $sl(3|2)$ in Lorentzian signature. We take the opportunity to review some of the properties of the $\mathcal{N}=2$ super-$\mathcal{W}_3$ conformal algebra, including its multiplet structure, OPE's and spectral flow invariance, correcting some minor typos present in the literature.
description: 42 pages, 4 tables
D5.5: Business impact assessment and roadmap for effective management
Creators: name: van den Berg, Gideon
name: Romasanta, Angelo Kenneth
Publisher: name: Zenodo
Year: 2023

description: This report presents an overview of the Science Mesh, its vision, goals, governance, and contribution to EOSC and FAIR. The lean canvas is then used to highlight the primary challenges and opportunities, including the problems being addressed by the Science Mesh, current alternatives, customer segments, early adopters, the unique value proposition, the Science Mesh solutions, unfair advantage, communication channels, key metrics, cost structure, revenue model, strategic roadmap, and risk mitigation strategies.
Η επίδραση των Πληροφοριακών Συστημάτων Διοίκησης Ανθρώπινων Πόρων (HRIS) στον μετασχηματισμό των υπηρεσιών στον δημόσιο τομέα στην Κύπρο
Creators: name: Πρατζιώτη, Μιχάλια Αντρέα
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: HRIS
Συστήματα
Oργανωτική αποτελεσματικότητα
Ψυχολογική ενδυνάμωση
Δημόσιος τομέας
Systems
Organizational effectiveness
Psychological empowerment
Public sector

description: Στόχος της παρούσας διπλωματικής εργασίας, είναι να διερευνήσει τον αντίκτυπο της υιοθέτησης πληροφοριακών συστημάτων διοίκησης ανθρώπινου δυναμικού (HRIS) στην οργανωτική αποτελεσματικότητα και ψυχολογική ενδυνάμωση των εργαζομένων του ευρύτερου Δημόσιου Τομέα της Κύπρου. Η έρευνα εστίασε σε τρία είδη συστημάτων HRIS, της ηλεκτρονικής μισθοδοσίας ( e-payroll) , της ηλεκτρονικής εκπαίδευσης ( e-training) και της ηλεκτρονικής επικοινωνίας (e-communication), που ξεκίνησαν ήδη να εφαρμόζονται σε κάποιες υπηρεσίες σε μεγαλύτερο βαθμό και σε άλλες σε πιο πρωταρχικό στάδιο . Η ανάλυση επικεντρώθηκε γύρω από 10 υπηρεσίες από την Κεντρική Κυβέρνηση και Ημικρατικούς Οργανισμούς στην προσπάθεια να συλλεχθεί ένα ευρύ δείγμα δημοσιών υπαλλήλων από διάφορες υπηρεσίες ούτως ώστε να μπορέσει να σχηματιστεί μια όσο το δυνατόν πιο ολοκληρωμένη άποψη για τα συστήματα διοίκησης ανθρώπινου δυναμικού που χρησιμοποιεί ο δημόσιος τομέας.
description: The aim of this thesis is to investigate the impact of the adoption of HRIS on the organizational effectiveness and psychological empowerment of employees in the Public Sector of Cyprus. The research focused on three types of HRIS systems, e-payroll, e-training and e-communication, which have already started to be implemented in some services to a greater extent and in others at a more primary stage. The analysis was focused around 10 departments from the Central Government and Semi-State Organisations in an attempt to collect a broad sample of civil servants from different departments in order to be able to form as comprehensive a view as possible of the HR management systems used by the public sector.
Impacto de los Sistemas de Producción Agropecuarios en el Desarrollo Local Sostenible de Nicaragua, 1998-2005: Índice de Malmquist DEA con un Producto Orientado.
Creators: name: Zúniga-González, Carlos Alberto
name: Zúniga-González, Carlos Alberto
Publisher: name: Unknown
Year: 2013
Subjects: subject: Productivity Analysis
subject: Índices de Malmquist
subject: Sistema de producción
subject: Desarrollo Local Sostenible

description: Este estudio muestra, como contribuyen al desarrollo local sostenible (DLS) los sistemas de producción agropecuarios de Nicaragua, durante los períodos de 1998-2001 y el año 2005. El artículo se organiza en la primera sección, con una revisión de la literatura sobre la metodología del DEA (Análisis de Datos Envolvente), el enfoque de sistemas y la teoría del desarrollo sostenible local, la segunda sección aborda el tipo de datos utilizados, la tercera sección explica la metodología utilizada, la cuarta sección es dedicada a los resultados y la última sección muestra las conclusiones. En el estudio utilizamos la metodología del DEA, con el índice de Malmquist para calcular el cambio en la productividad total de los factores (PTF) durante el período estudiado, este índice es integrado en el diseño econométrico del modelo de desarrollo local sostenible (MDLS) para medir la contribución al DLS. Los resultados de la investigación evidencian que el subsistema forestal y producción de patio presentan una tendencia creciente en el cambio de PTF. Las variables utilizadas en el modelo explican en menos del 50% la contribución al DLS, dado su nivel de significancia y su nivel de contribución. Estas variables son la social y la productiva y los subsistemas que se destacan el forestal y la producción de patio.
Accretion of Galaxy Groups into Galaxy Clusters
Creators: name: Benavides, José. A.
name: Sales, Laura. V.
name: Abadi, Mario. G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We study the role of group infall in the assembly and dynamics of galaxy clusters in $Λ$CDM. We select $10$ clusters with virial mass $M_{\rm 200} \sim 10^{14} \, M_{\odot}$ from the cosmological hydrodynamical simulation Illustris and follow their galaxies with stellar mass $M_{\star} \geq 1.5 \times 10^8 \, M_{\odot}$. A median of $\sim 38\%$ of surviving galaxies at $z=0$ are accreted as part of groups and did not infall directly from the field, albeit with significant cluster-to-cluster scatter. The evolution of these galaxy associations is quick, with observational signatures of their common origin eroding rapidly in $1$-$3$ Gyr after infall. Substructure plays a dominant role in fostering the conditions for galaxy mergers to happen, even within the cluster environment. Integrated over time, we identify (per cluster) an average of $17 \pm 6$ mergers that occur in infalling galaxy associations, of which $7 \pm 3$ occur well within the virial radius of their cluster hosts. The number of mergers show large dispersion from cluster to cluster, with our most massive system having $42$ mergers above our mass cut-off. These mergers, which are typically gas rich for dwarfs and a combination of gas rich and gas poor for $M_{\star} \sim 10^{11} \, M_{\odot}$, may contribute significantly within $Λ$CDM to the formation of specific morphologies, such as lenticulars (S0) and blue compact dwarfs in groups and clusters.
description: 12 pages, 11 figures. Accepted for publication in MNRAS
The Universality of Turbulence in Galactic Molecular Clouds
Creators: name: Heyer, Mark
name: Brunt, Christopher
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The universality of interstellar turbulence is examined from observed structure functions of 27 giant molecular clouds and Monte Carlo modeling. We show that the structure functions, dv=v0 l^gamma, derived from wide field imaging of CO J=1-0 emission from individual clouds are described by a narrow range in the scaling exponent, gamma, and the scaling coefficient, v0. The similarity of turbulent structure functions emphasizes the universality of turbulence in the molecular interstellar medium and accounts for the cloud-to-cloud size-line width relationship initially identified by Larson (1981). The degree of turbulence universality is quantified by Monte Carlo simulations that reproduce the mean squared velocity residuals of the observed cloud-to-cloud relationship. Upper limits to the variation of the scaling amplitudes and exponents for molecular clouds are ~10-20%. The measured invariance of turbulence for molecular clouds with vastly different sizes, environments, and star formation activity suggests a common formation mechanism such as converging turbulent flows within the diffuse ISM and a limited contribution of energy from sources within the cloud with respect to large scale driving mechanisms.
description: 11 pages, 2 figures, Accepted for publication in ApJ Letters
Experimental Hamiltonian Identification for Qubits subject to Multiple Independent Control Mechanisms
Creators: name: Schirmer, Sonia G.
name: Oi, Daniel K. L.
name: Kolli, Avinash
name: Cole, Jared H.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider a qubit subject to various independent control mechanisms and present a general strategy to identify both the internal Hamiltonian and the interaction Hamiltonian for each control mechanism, relying only on a single, fixed readout process such as $σ_z$ measurements.
description: submitted to Proceedings of the QCMC04 (4 pages RevTeX, 5 figures)
LA LUCHA POR LAS TIERRAS DE SUTIABA EN LA DÉCADA DE 1950: MEMORIAS DE MUJERES QUE INTEGRARON LA PRIMERA JUNTA DIRECTIVA FEMENINA DE LA COMUNIDAD INDÍGENA DE SUTIABA.
Creators: name: Strasser, Monica
name: Strasser, Monica
Publisher: name: Unknown
Year: 2013
Subjects: subject: Teaching/Communication/Extension/Profession
subject: Sutiaba
subject: mujeres
subject: Comunidad Indígena
subject: Títulos Reales

description: A partir de los años 50 del siglo pasado los terratenientes leoneses, buscando terreno para cultivar algodón de manera intensiva, empezaron a apropiarse de las tierras de las comunidades indígenas de Sutiaba. Cuando los indígenas perdieron gran parte de sus tierras y ríos, rescataron su estructura organizativa ancestral para luchar por sus derechos a sus tierras, resultando en la formación de la “Comunidad Indígena de “Sutiaba” en 1954. Dos días después de que se formara la Junta Directiva Masculina se constituyó la Junta Directiva Femenina, integrada por 14 mujeres. Este artículo trata de analizar la participación femenina en esta lucha por las tierras teniendo como fuentes; el Libro de Actas desde el año 1954 al 1955 de la Junta Directiva y los testimonios de mujeres que pertenecían a esta primera Junta Directiva femenina. Así se pretende valorar la participación de la mujer en la década de los 50 cuando se dieron las luchas más intensas entre la Comunidad Indígena de Sutiaba y el gobierno local y Nacional y conocer las motivaciones, los propósitos y las actividades de esta primera junta femenina.
On the physical origins of the negative index of refraction
Creators: name: Ward, David W.
name: Nelson, Keith A.
name: Webb, Kevin J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Optics (physics.optics)
subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: The physical origins of negative refractive index are derived from a dilute microscopic model, producing a result that is generalized to the dense condensed phase limit. In particular, scattering from a thin sheet of electric and magnetic dipoles driven above resonance is used to form a fundamental description for negative refraction. Of practical significance, loss and dispersion are implicit in the microscopic model. While naturally occurring negative index materials are unavailable, ferromagnetic and ferroelectric materials provide device design opportunities.
description: 4 pages, 1 figure
EVALUACIÓN DEL COMPONENTE CURRICULAR DE SOCIOLOGÍA QUE SE REALIZÓ EN EL PERÍODO 2007-2008 EN LA UNAN – LEÓN, COMO INSUMO PARA LA MEJORA CONTINUA.
Creators: name: Gonzalez-Gutierrez, Xochilt
name: Gonzalez-Gutierrez, Xochilt
Publisher: name: Unknown
Year: 2013
Subjects: subject: Teaching/Communication/Extension/Profession
subject: Sociología
subject: evaluación curricular
subject: mejora continua.

description: El presente artículo tiene como finalidad mostrar una propuesta mejorada del programa curricular de Sociología que se impartió en el período 2007 - 2008. Para su realización se evaluaron los elementos del programa, como contenidos, metodologías de enseñanza y evaluación del aprendizaje; teniendo en cuenta la opinión de diferentes fuentes involucradas: estudiantes, docentes y expertos de UNAN - León y Universidad Centroamericana (UCA). La información se obtuvo a través de encuestas aplicada a estudiantes, entrevistas a profesores que impartieron el componente curricular y expertos en el campo de la Sociología. Se encontró que de los 23 temas abordados solamente 60.87% fueron considerados importantes por los estudiantes; en cambio los profesores y expertos los valoraron como apropiados. A juicio de las fuentes consultadas las metodologías de enseñanza necesitan tener mayor coherencia con los contenidos y que en la evaluación del aprendizaje las habilidades que presentaron mayores dificultades son la búsqueda bibliográfica (56.8%) y la comprensión del nuevo conocimiento (56.1%).
Gli studi classici e i Linked Ancient World Data
Creators: name: Berti, Monica
Publisher: name: Zenodo
Year: 2021
Subjects: digital classics
LOD
LAWD

description: Slides prepared for the presentation at the online conference Scienze dell’Antichità e Digital Humanities: buone pratiche, frontiere teoriche e prospettive di ricerca, held on March 10, 2021 at Università degli Studi di Roma Tre
PRÁCTICAS PROFESIONALES, UNA CONTRIBUCIÓN A LA MEJORA DEL CURRÍCULUM EN LA CARRERA DE PSICOLOGÍA DE LA UNAN – LEÓN.
Creators: name: Kulakova, Olga V.
name: Kulakova, Olga V.
Publisher: name: Unknown
Year: 2013
Subjects: subject: Teaching/Communication/Extension/Profession
subject: Carrera de Psicología. Prácticas Profesionales. Currículum

description: Antecedentes y objetivos. Las Prácticas Profesionales representan una experiencia valiosa e importante en la formación de los estudiantes universitarios. Sin embargo existe poca documentación sobre la evaluación de esta área de formación. Tomando como contexto el re-diseño curricular, con el fin de adecuar los planes de estudio al Modelo de Currículum Basado en Competencias, como objetivos se planteó analizar los escenarios y actividades de aprendizaje de las Prácticas Profesionales (PP) de la carrera de Psicología e identificar las necesidades formativas percibidas por los estudiantes. Metodología. Se realizó un estudio cuanticualitativo aplicando una encuesta semi-estructurada a los estudiantes del último año de la carrera de Psicología. Además, se realizaron entrevistas a las autoridades y a los docentes que han tenido a cargo las tutorías y las supervisiones. Resultados. Predominaron las preocupaciones relacionadas con una débil estructura metodológica y organizativa de esta área curricular, una falta del vínculo entre teoría y práctica y una falta de diversidad de contextos para la realización de las prácticas. Conclusiones. A pesar que las PP son vistas como una oportunidad para que el estudiante desarrolle sus competencias en las condiciones reales, la planificación actual de las PP en la carrera de Psicología limita el desarrollo de las capacidades para actuar en distintos niveles de contacto y en diferentes ámbitos de la profesión.
Machine Learning-based Approach for Depression Detection in Twitter Using Content and Activity Features
Creators: name: AlSagri, Hatoon S.
name: Ykhlef, Mourad
Publisher: name: arXiv
Year: 2020
Subjects: subject: Social and Information Networks (cs.SI)
subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: J.4; H.3.3; H.5.1

description: Social media channels, such as Facebook, Twitter, and Instagram, have altered our world forever. People are now increasingly connected than ever and reveal a sort of digital persona. Although social media certainly has several remarkable features, the demerits are undeniable as well. Recent studies have indicated a correlation between high usage of social media sites and increased depression. The present study aims to exploit machine learning techniques for detecting a probable depressed Twitter user based on both, his/her network behavior and tweets. For this purpose, we trained and tested classifiers to distinguish whether a user is depressed or not using features extracted from his/ her activities in the network and tweets. The results showed that the more features are used, the higher are the accuracy and F-measure scores in detecting depressed users. This method is a data-driven, predictive approach for early detection of depression or other mental illnesses. This study's main contribution is the exploration part of the features and its impact on detecting the depression level.
description: 16 pages, 7 figures, journal article
Yangian Symmetries of Matrix Models and Spin Chains: The Dilatation Operator of $\cal N$$=4$ SYM
Creators: name: Agarwal, A.
name: Rajeev, S. G.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present an analysis of the Yangian symmetries of various bosonic sectors of the dilatation operator of $\cal N$$=4$ SYM. The analysis is presented from the point of view of Hamiltonian matrix models. In the various SU(n) sectors, we give a modified presentation of the Yangian generators, which are conserved on states of any size. A careful analysis of the Yangian invariance of the full SO(6) sector of the scalars is also presented in this paper. We also study the Yangian invariance of the dilatation operator beyond first order perturbation theory in the SU(2) sector. Following this, we derive the continuum limits of the various matrix models and reproduce the sigma model actions for fast moving strings reported in the recent literature. We motivate the constructions of continuum sigma models (corresponding to both the SU(n) and SO(n) sectors) as variational approximations to the matrix model Hamiltonians. These sigma models retain the semi-classical counterparts of the original Yangian symmetries of the dilatation operator. The semi-classical Yangian symmetries of the sigma models are worked out in detail. The zero curvature representation of the equations of motion and the construction of the transfer matrix for the SO(n) sigma model obtained as the continuum limit of the one loop bosonic dilatation operator is carried out, and the similar constructions for the SU(n) case are also discussed.
description: 40 pages, 5 figures. Typos corrected and references added in revised version
Lattice Study of the O(3) Supersymmetric Sigma Model
Creators: name: Ghadab, Sofiane
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We present preliminary numerical results from a lattice study of the two-dimensional O(3) non-linear sigma model. In the continuum this model possesses N=2 supersymmetry. The lattice formulation we use retains an exact (twisted) supersymmetry except for a soft breaking associated with a Wilson mass term needed to remove the doubles. Our numerical results show that the partition function is independent of coupling as predicted by supersymmetry.
description: 3 pages, 1 figure, presented at Lattice04(Theory)
MORS OMNIA AEQUAT: HISTORIA DEL CEMENTERIO DE GUADALUPE DE LA CIUDAD DE LEÓN
Creators: name: Strasser, Monika
name: Strasser, Monika
Publisher: name: Unknown
Year: 2013
Subjects: subject: Teaching/Communication/Extension/Profession
subject: Cementerio de Guadalupe
subject: León
subject: Junta de Caridad
subject: Junta de Beneficencia
subject: Junta Local de Asistencia Social

description: Este artículo describe la evolución histórica del Cementerio de Guadalupe desde sus orígenes en los años 1830, cuando en toda la nación surgieron los primeros cementerios fuera de las poblaciones. A través de las fechas en las tumbas y la revisión de fuentes documentales se llega a la conclusión que el cementerio fue creciendo desde el sur hacia el oeste, norte y este. En una última fase a finales del siglo XX se compró lo que se conoce como “anexo” del Cementerio de Guadalupe. Aparte de la evolución espacial el artículo describe, recurriendo principalmente a fuentes documentales, las funciones de las Juntas de Caridad, de Beneficencia y de Asistencia Social para entender cómo han sido administrados los cementerios en Nicaragua y el de Guadalupe en específico en diferentes etapas históricas antes de que pasara a la alcaldía en los años 1980. Atención especial recibe la muralla central, que fue declarada patrimonio nacional en 1983.
Three essays on asymmetric financial access
Creators: name: Chu, Yin-Chen
Publisher: name: University of British Columbia
Year: 2011

description: This dissertation consists of three essays on issues related to asymmetric financial access in two-country general equilibrium models with sticky prices. The form of asymmetric financial access is in terms of two groups of households: One group has full access to both bond and money markets, while the other is prohibited from bond trade or even monetary adjustments. The first essay is to examine effects of financial asymmetry on economic volatility. It finds that the effects depend on whether, in addition to restrictions on bond trade, you also have restrictions on monetary adjustments, among households who face financial limitation. If financially constrained households are prohibited from bond trade only, then inter-household monetary adjustments serve as a shock absorber and we have similar economic volatility under different degrees of financial asymmetry. If financially constrained households are prohibited from both bond trade and monetary adjustments, then we have positive correlation between degrees of economic volatility and financial imperfection. The second essay is to examine welfare effects of economic uncertainty under financial asymmetry. The welfare measure is defined as how much initial steady-state consumption a household is willing to give up to negate effects of economic uncertainty. The essay finds that lower degrees of foreign financial openness increase welfare loss of financially unconstrained households but decrease welfare loss of financially constrained households. Moreover, welfare loss of both types of households is reduced with lower degrees of home financial openness. It also finds that if financially constrained households are prohibited from both bond trade and monetary adjustments, then welfare loss of both types of households increases. The third essay is to examine welfare effects of exchange-rate regimes under financial asymmetry. It is assumed that governments fix their money supply at initial steady-state levels in the flexible exchange-rate regime, while coordinating their monetary policies to maintain the exchange rate level in the fixed exchange-rate regime. The welfare measure is defined as expected utility excluding the term associated with real balances. The essay finds that under financial asymmetry, fixed nominal exchange rates are in many cases preferable to flexible nominal exchange rates by both types of households. For financially unconstrained households, wealth effects associated with the monetary policies that aim to maintain the exchange rate level can dominate the welfare cost of fixed nominal exchange rates. For financially constrained households, they can not enjoy the benefit brought by expenditure switching effects due to their financial restriction, but need to bear the associated cost of higher economic variability. Therefore by reducing expenditure switching effects, the fixed exchange-rate regime can increase their welfare.