cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Diseño de una propuesta de lectoescritura dirigida a niños del primer grado de la escuela urbana mixta Eduardo Santos Montejo de Cartagena
Creators: name: Botero Esquivia, Feliciana
name: Mattos Arroyo, Hayde
Publisher: name: Universidad de Cartagena
Year: 1996
Subjects: subject: Lectura - Enseñanza
subject: Escritura - Enseñanza
subject: Comprensión de lectura

description: El presente proyecto pretende desarrollar una propuesta pedagógica que derrumbe la muralla infranqueable en que se nos ha convertido la deficiencia lectoescritora en nuestros escolares. Los cambios necesarios para enfrentar sobre bases nuevas la alfabetización incial no se resuelven con un nuevo método de enseñanza, ni con nuevos test de madures, ni con nuevos materiales didácticos, ni nuevos libros de lectura. Un nuevo método no resuelve los problemas. Hay que realizar las prácticas de introducción a la lengua escrita, tratando de ver los supuestos que subyacen a ella, y hasta que punto funcionan como filtro de transformación selectiva y deformante de cualquier propuesta innovadora.
Szekeres models: a covariant approach
Creators: name: Apostolopoulos, Pantelis S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We exploit the 1+1+2 formalism to covariantly describe the inhomogeneous and anisotropic Szekeres models. It is shown that an \emph{average scale length} can be defined \emph{covariantly} which satisfies a 2d equation of motion driven from the \emph{effective gravitational mass} (EGM) contained in the dust cloud. The contributions to the EGM are encoded to the energy density of the dust fluid and the free gravitational field $E_{ab}$. We show that the quasi-symmetric property of the Szekeres models is justified through the existence of 3 independent \emph{Intrinsic Killing Vector Fields (IKVFs)}. In addition the notions of the Apparent and Absolute Apparent Horizons are briefly discussed and we give an alternative gauge-invariant form to define them in terms of the kinematical variables of the spacelike congruences. We argue that the proposed program can be used in order to express Sachs' optical equations in a covariant form and analyze the confrontation of a spatially inhomogeneous irrotational overdense fluid model with the observational data.
description: 16 pages, no figures; (v3) few further amendments and some references added, final version to appear in Class. Quant. Gravity
Taeniophyllum rudolfii var. productilis Kocyan & Schuit. 2013, comb. nov.
Creators: name: Kocyan, Alexander
name: Schuiteman, André
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Orchidaceae
Taeniophyllum
Taeniophyllum rudolfii
Taeniophyllum rudolfii var. productilis (n.hallé) kocyan & schuit.

description: Taeniophyllum rudolfii var. productilis (N.Hallé) Kocyan & Schuit., comb. nov.
 Basionym: Microtatorchis schlechteri var. productilis Hallé (1977: 393).
description: Published as part of Kocyan, Alexander & Schuiteman, André, 2014, New combinations in Aeridinae (Orchidaceae), pp. 61-85 in Phytotaxa 161 (1) on page 74, DOI: 10.11646/phytotaxa.161.1.3, http://zenodo.org/record/5128794
Are measures of sleep disturbance routinely captured in trials for chronic low back pain? - A protocol for a scoping review
Creators: name: Neilson, Brett
name: Dickerson, Chris
name: Young, Jodi
name: Shepherd, Mark
name: Rhon, Dan
Publisher: name: Open Science Framework
Year: 2023
Subjects: subject: Orthopedics
subject: Chemicals and Drugs
subject: Alternative and Complementary Medicine
subject: Physiotherapy
subject: Medicine and Health Sciences
subject: Medical Specialties
subject: Rehabilitation and Therapy
subject: Surgery
subject: Physical Therapy
subject: Chronic Pain
subject: Low Back Pain
subject: Pain
subject: Sleep
subject: Trial

description: A scoping review of the rate of reporting of measures of sleep in trials for chronic low back pain published from 2010-2022
Analysis of Finite Element Methods for Vector Laplacians on Surfaces
Creators: name: Hansbo, Peter
name: Larson, Mats G.
name: Larsson, Karl
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65M60, 65N15, 65N30

description: We develop a finite element method for the vector Laplacian based on the covariant derivative of tangential vector fields on surfaces embedded in $\mathbb{R}^3$. Closely related operators arise in models of flow on surfaces as well as elastic membranes and shells. The method is based on standard continuous parametric Lagrange elements which describe a $\mathbb{R}^3$ vector field on the surface and the tangent condition is weakly enforced using a penalization term. We derive error estimates that take the approximation of both the geometry of the surface and the solution to the partial differential equation into account. In particular we note that to achieve optimal order error estimates, in both energy and $L^2$ norms, the normal approximation used in the penalization term must be of the same order as the approximation of the solution. This can be fulfilled either by using an improved normal in the penalization term, or by increasing the order of the geometry approximation. We also present numerical results using higher-order finite elements that verify our theoretical findings.
Taeniophyllum samoense Kocyan & Schuit. 2013, comb. nov.
Creators: name: Kocyan, Alexander
name: Schuiteman, André
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Orchidaceae
Taeniophyllum
Taeniophyllum samoense

description: Taeniophyllum samoense (Schltr.) Kocyan & Schuit., comb. nov.
 Basionym: Microtatorchis samoensis Schlechter (1911b: 111).
description: Published as part of Kocyan, Alexander & Schuiteman, André, 2014, New combinations in Aeridinae (Orchidaceae), pp. 61-85 in Phytotaxa 161 (1) on page 74, DOI: 10.11646/phytotaxa.161.1.3, http://zenodo.org/record/5128794
title: Modularisierung hochschuldidaktischer Weiterbildung und Beratung
title: Neues Angebot am HDZ
titleType: AlternativeTitle
Creators: name: Dany, Sigrid
Publisher: name: Hochschuldidaktisches Zentrum der Technischen Universität Dortmund
Year: 2003
Subjects: subject: 370

description: Journal Hochschuldidaktik ; 14. Jahrgang 2003 Heft 2
Mujer y patriarcado: hacia una revisión bibliocrítica de en diciembre llegaban las brisas de Marvel Moreno. Lo complejo como método de la re-escritura del texto.
Creators: name: Caballero Franco, Carolina De Jesús
name: Castro Macea, Carlos Andrés
Publisher: name: Universidad de Cartagena
Year: 2010
Subjects: Mujer
Patriarcado
Revisión Bibliocrítica

description: Tesis (Lingüistica y Literatura) -- Universidad de Cartagena. Facultad de Ciencias Humanas. Programa de Lingüistica y Literatura, 2010.
description: En esta investigación realizamos una revisión bibliocrítica en la que estudiamos de manera minuciosa la crítica literaria sobre la novela de Moreno. Además, ésta dialoga con lo que Umberto Eco (2001) denomina “tesis panorámica”, que muestra una visión amplía sobre las distintas perspectivas teóricas y metodológicas utilizadas por los académicos para trabajar la temática (mujer y patriarcado) de En diciembre llegaban las brisas. El objetivo de esta propuesta metodológica es, entonces, demostrar que la novela de Moreno no agota su significado con interpretaciones desde una disciplina. En diciembre llegaban las brisas debe estudiarse desde un enfoque interdisciplinar que reestructure los paradigmas no sólo literarios, sino también sociales. Todo esto, porque constantemente actualiza su contenido de contexto en contexto. De cada mirada sobre ella, se pueden extraer nuevos sentidos quizá nunca previstos ni por la autora ni por la crítica. Y servirá como antecedente a investigaciones futuras que contarán con un conjunto de métodos y teorías de análisis literario.
Quartic scaling MP2 for solids: A highly parallelized algorithm in the plane wave basis
Creators: name: Schäfer, Tobias
name: Ramberger, Benjamin
name: Kresse, Georg
Publisher: name: arXiv
Year: 2016
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We present a low-complexity algorithm to calculate the correlation energy of periodic systems in second-order Møller-Plesset perturbation theory (MP2). In contrast to previous approximation-free MP2 codes, our implementation possesses a quartic scaling, $\mathcal O (N^4)$, with respect to the system size $N$ and offers an almost ideal parallelization efficiency. The general issue that the correlation energy converges slowly with the number of basis functions is eased by an internal basis set extrapolation. The key concept to reduce the scaling is to eliminate all summations over virtual orbitals which can be elegantly achieved in the Laplace transformed MP2 (LTMP2) formulation using plane wave basis sets and Fast Fourier transforms. Analogously, this approach could allow to calculate second order screened exchange (SOSEX) as well as particle-hole ladder diagrams with a similar low complexity. Hence, the presented method can be considered as a step towards systematically improved correlation energies.
description: 12 pages, 10 figures
Assessing The Supply Chain Strategy Of Garment Firms Located At Addis Industrial Village
Creators: name: Getachew, Asaye
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: In the rapidly changing global business environment, many companies want to become efficient and flexible, but have struggled, in part, because they have not been able to formulate and implement appropriate supply chain strategies. The root cause of the problems plaguing many supply chains is a mismatch between the supply chain strategy and the business strategy, and supply-chain strategies based on a one-size-fits-all strategy often fail. Companies can use supply chain strategies to gain a competitive advantage for the supply chain. A competitive advantage can be achieved by means of low cost or by means of differentiation. The objective of this research is to assess the supply chain strategy implementation on selected Garment companies in Ethiopia and to imply the appropriate supply chain strategy. Furthermore, the research aimed to identify potential areas where these Garment firms may be able to improve their supply chain management practices. The supply chain strategies implemented by those selected garment companies are assessed through the analysis of those factors that can be considered when determining supply chain strategies i.e. the product characteristics, the manufacturing characteristics and the supply chain drivers. The potential areas where the companies may improve are identified through the analysis of how these companies are managing their supply chain drivers. Companies with lean supply chains should manage their supply chain drivers to achieve efficiency, while companies with agile supply chains should manage their supply chain drivers with responsiveness towards customers' needs in mind. Non-probability sampling is used to include eight companies in the research. However, out of all the companies targeted, only four effectively responded. The entire sample Garment companies do not manage their supply chain drivers according to the implied supply chain strategy principles
Infinite Barriers and Symmetries for a Few Trapped Particles in One Dimension
Creators: name: Harshman, N. L.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: This article investigates the properties of a few interacting particles trapped in a few wells and how these properties change under adiabatic tuning of interaction strength and inter-well tunneling. While some system properties are dependent on the specific shapes of the traps and the interactions, this article applies symmetry analysis to identify generic features in the spectrum of stationary states of few-particle, few-well systems. Extended attention is given to a simple but flexible three-parameter model of two particles in two wells in one dimension. A key insight is that two limiting cases, hard-core repulsion and no inter-well tunneling, can both be treated as emergent symmetries of the few-particle Hamiltonian. These symmetries are the mathematical consequences of infinite barriers in configuration space. They are necessary to explain the pattern of degeneracies in the energy spectrum, to understand how degeneracies are broken for models away from limiting cases, and to explain separability and integrability. These symmetry methods are extendable to more complicated models and the results have practical consequences for stable state control in few-particle, few-well systems with ultracold atoms in optical traps.
description: 17 pages in two-column format, 9+ figures; v2 heavily revised (especially introduction) and new references
Taeniophyllum steenisii Kocyan & Schuit. 2013, comb. nov.
Creators: name: Kocyan, Alexander
name: Schuiteman, André
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Orchidaceae
Taeniophyllum
Taeniophyllum steenisii

description: Taeniophyllum steenisii (J.J.Sm.) Kocyan & Schuit., comb. nov.
 Basionym: Microtatorchis steenisii Smith (1931: 250).
description: Published as part of Kocyan, Alexander & Schuiteman, André, 2014, New combinations in Aeridinae (Orchidaceae), pp. 61-85 in Phytotaxa 161 (1) on page 74, DOI: 10.11646/phytotaxa.161.1.3, http://zenodo.org/record/5128794
Niveles de satisfacción del usuario en la prestación del servicio de oncología en salud como indicador de calidad del Centro Radio Oncológico del Caribe durante el segundo periodo del 2013
Creators: name: Pérez Toro, Elida Margarita
name: Sanfeliu Bresneyder, Genova
Publisher: name: Universidad de Cartagena
Year: 2013
Subjects: Administración de servicios de salud
Servicios de salud - Indicadores de calidad

description: Tesis (Especialista en Gerencia en Salud) – Universidad de Cartagena. Facultad de Ciencias Económicas. Especialización en Gerencia en Salud, 2013
description: El objetivo de esta investigación busca estimar los niveles de satisfacción del usuario con indicador de la calidad de la prestación del servicio en el Centro Radio Oncológico del Caribe durante el segundo periodo del 2013.
ATIVIDADE LÚDICA ASSOCIADA A FISIOTERAPIA RESPIRATÓRIA EM CRIANÇAS: REVISÃO DE ESCOPO
Creators: name: Silva, Gabriella
name: Pereira, Karina
name: Villela, Maria
Publisher: name: Open Science Framework
Year: 2023
Subjects: subject: Physiotherapy
subject: Medicine and Health Sciences
subject: Rehabilitation and Therapy
subject: Respiratory Therapy
subject: Play and Playthings

description: Na fisioterapia pediátrica é importante a atividade lúdica para realizar atendimentos, e para que a terapia respiratória seja mais eficaz a criança precisa ser colaborativa. Desta forma, é importante investigar na literatura os estudos que utilizaram da atividade lúdica durante o tratamento respiratório em crianças, e verificar quais foram as estratégias adotadas para ter maior efetividade. O tema é relevante, mas pouco abordado na literatura, e essa revisão de escopo poderá reunir, apresentar detalhes e discussões de acordo com a abordagem de cada estudo para destacar quais atividades lúdicas associadas à fisioterapia respiratória em pediatria tem apresentado melhores impactos.
Berechnung der elektromagnetischen Kräfte bei der elektromagnetischen Blechumformung unter Berücksichtigung der Strukturänderung
Creators: name: Joswig, Ana
Publisher: name: Technische Universität Dortmund
Year: 2007
Subjects: subject: Numerische Feldberechnung
subject: FDZS
subject: Finite Differenzen Zeitschrittrechnung
subject: FEM
subject: Finite Elemente Methode
subject: Elektromagnetische Umformung
subject: Elektromagnetisches Feld
subject: Finite Differenzenmethode
subject: Blechumformung
subject: 620

description: Die elektromagnetische Umformung (EMU) basiert auf der Induktions- und Kraftwirkung eines zeitlich schnell veränderlichen impulsförmigen Magnetfeldes auf ein gut leitfähiges Material. Sie wird bereits seit mehr als 50 Jahren im Bereich der Umformung von rohrförmigen Werkstücken industriell eingesetzt. Dagegen ist die Anwendung bei der Blechumformung bis heute nur unzureichend möglich. Die vorliegende Arbeit leistet einen Beitrag zum Verständnis der elektromagnetischen Wirkmechanismen und der Möglichkeiten der numerischen Berechnung der Blechumformung. Aufgrund der geometrischen Gegebenheiten und der sehr hohen Dynamik während der Umformung ist es messtechnisch kaum möglich, die wirksame Feld- und Stromdichteverteilung im Werkzeug und im Werkstück zu erfassen. Die numerische Berechnung der Feldgrößen ist daher unerlässlich. Dabei muss insbesondere die Wechselwirkung zwischen den elektrodynamischen und den strukturmechanischen Vorgängen beachtet werden. Die Simulation des gesamten Prozesses stellt ein notwendiges Hilfsmittel dar, um das Umformergebnis bestimmen zu können, ohne auf kosten- und zeitintensive Experimente ausweichen zu müssen. In der vorliegenden Arbeit wurden daher bestehende Simulationswerkzeuge so erweitert, dass die gekoppelte transiente elektrodynamische-strukturmechanische Berechnung möglich ist. Die Wechselwirkung zwischen der Geometrieänderung und der daraus resultierenden Feld- und Stromdichteverteilung wird bei der Simulation erfasst. Es wurden sowohl vorhandene kommerzielle Programme als auch nicht-kommerzielle Software verwendet. Anschliessend wurden mit den unterschiedlichen Programmsystemen eine Vielzahl von Berechnungen auf Basis unterschiedlicher Modelle und unterschiedlicher Kopplungstrategien durchgeführt. Eine vereinfachte transiente zweidimensionale Berechnung ohne Berücksichtigung der Geometrieänderung ergab erste Erkenntnisse über die Feld- und Stromdichteverteilung.
Extending the Golay Equation for Coupling a Gas Chromatograph to a Drift Tube IMS
Creators: name: Kobelt, Tim
name: Kirk, Ansgar T.
name: Zimmermann, Stefan
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2023
Subjects: subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: When it comes to analyzing complex mixtures with highly sensitive ion mobility spectrometers (IMS), a pre-separation of these mixtures is often required due to chemical cross sensitivities and limitations in IMS resolving power. In most cases, gas chromatographic (GC) pre-separation is used. In contrast to typical GC detectors, such as flame ionization detectors or photo ionization detectors, an IMS can add significant dead volume to the system due to its ionization chamber. This dead volume causes memory effects and peak broadening affecting the performance of the chromatographic pre-separation. Therefore, a new but simple model has been developed to estimate the effect of additional detector dead volume and to obtain the optimal operating parameters. This model considers both geometric parameters, such as column length and column diameter, and operating parameters, such as flow rate and temperature of the gas chromatograph and IMS. In addition, the effects induced by the compressibility of the mobile phase were taken into account. In comparison to the commonly used Golay equation our model predicts increased plate heights at low and medium linear velocities. Our model has been experimentally verified using an ultra-high sensitive IMS detector in combination with capillary columns of different lengths and diameters. A UV lamp has been used for ionization due to its good linearity. The columns have been held in isotherm conditions and, additionally, they have been operated with purified air as mobile phase. For each capillary under investigation, a series of measurements with different linear drift velocities has been performed. From these experimental data, the vast difference in plate heights at low linear velocities compared to the expected values from the Golay equation can be confirmed. Despite the simplicity of our model, the predictions are in good accordance with the measurements. Thus, the GC-IMS operating parameters can be easily optimized with respect to maximum gas chromatic pre-separation.
Taeniophyllum taenioides Kocyan & Schuit. 2013, comb. nov.
Creators: name: Kocyan, Alexander
name: Schuiteman, André
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Orchidaceae
Taeniophyllum
Taeniophyllum taenioides

description: Taeniophyllum taenioides (P.O’Byrne) Kocyan & Schuit., comb. nov.
 Basionym: Microtatorchis taenioides O'Byrne (1998: 47).
description: Published as part of Kocyan, Alexander & Schuiteman, André, 2014, New combinations in Aeridinae (Orchidaceae), pp. 61-85 in Phytotaxa 161 (1) on page 74, DOI: 10.11646/phytotaxa.161.1.3, http://zenodo.org/record/5128794
Pricing European and American Options under Heston Model using Discontinuous Galerkin Finite Elements
Creators: name: Kozpınar, Sinem
name: Uzunca, Murat
name: Karasözen, Bülent
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computational Finance (q-fin.CP)
subject: Numerical Analysis (math.NA)
subject: FOS: Economics and business
subject: FOS: Mathematics
subject: 65M60, 91B25, 91G80

description: This paper deals with pricing of European and American options, when the underlying asset price follows Heston model, via the interior penalty discontinuous Galerkin finite element method (dGFEM). The advantages of dGFEM space discretization with Rannacher smoothing as time integrator with nonsmooth initial and boundary conditions are illustrated for European vanilla options, digital call and American put options. The convection dominated Heston model for vanishing volatility is efficiently solved utilizing the adaptive dGFEM. For fast solution of the linear complementary problem of the American options, a projected successive over relaxation (PSOR) method is developed with the norm preconditioned dGFEM. We show the efficiency and accuracy of dGFEM for option pricing by conducting comparison analysis with other methods and numerical experiments.
Estudio de factibilidad para la construcción de una nueva edificación para las facultades de Trabajo Social, Ingeniería Civil, Economía, Administración de Empresas, Contaduría Publica y otras que puedan crearse en la Universidad de Cartagena
Creators: name: Acosta Meza, Raúl E.
name: Barrios Vargas, Carmiña
name: Fuentes Manjarrez, Nelfy R.
Publisher: name: Universidad de Cartagena
Year: 1981
Subjects: Estudiantes universitarios
Estudio de mercado
Localización

description: Tesis (Economista).--Universidad de Cartagena. Facultad de Ciencias Económicas. Programa de Economía, 1981
description: El presente trabajo tiene como objetivo, hacer un estudio que sirva de motivación a las Directivas de la Universidad de Cartagena y al Gobierno Nacional para acelerar la elaboración de un plan de desarrollo que agilice por parte del Gobierno la construcción de unas nuevas instalaciones para la Facultad de Trabajo Social, Ingeniería Civil, Economía, Administración de Empresas, Contaduría Pública y otros que puedan crearse en los terrenos de Turbaco.
Improving ion mobility spectrometer sensitivity through an optimized sample gas flow
Creators: name: Kirk, Ansgar T.
name: Kueddelsmann, Maximilian J.
name: Zimmermann, Stefan
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2023
Subjects: subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: The gas flow transporting the sample molecules into and through the reaction region of an ion mobility spectrometer (IMS) has a profound influence on its response, determining both sensitivity and response time. In the past, several key improvements relating to the sample gas flow have been reported, for example the use of a drift gas counter-flow by Baim et al., on-axis sample introduction by St. Louis et al. or side-flow sample introduction by Lee et al. Here, we also aim to optimize the sample gas flow inside an IMS equipped with an extended field switching shutter. By introducing a laminar flow curtain orthogonal to the drift direction through the small field-free reaction region, a significant increase in sensitivity and decrease in response time could be achieved for an already extremely sensitive IMS. The constructed ion source is equipped with both a 10.6 eV UV lamp to initiate direct photo ionization (APPI) and a low-energy X-ray source to initiate chemical ionization (APCI). For an averaging time of just one second during continuous sample introduction, limits of detection in the pptv-range using APPI and in the ppqv-range using chemical ionization (APCI) are reached. For pulsed sample introduction, as in GC-IMS, limits of detection are currently under investigation. However, rise and fall times of less than a second have already been observed for volatile organic compounds at a system temperature of 45 °C. When using APCI, the combination of extremely high sensitivity with fast response times is especially suitable as an ultra-sensitive, orthogonal GC detector for analyzing complex mixtures. When using APPI, the combination of improved linearity with still high sensitivity is especially useful for directly analyzing moderately complex samples.
Asymptotic tensor rank of graph tensors: beyond matrix multiplication
Creators: name: Christandl, Matthias
name: Vrana, Péter
name: Zuiddam, Jeroen
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: Computational Complexity (cs.CC)
subject: Quantum Physics (quant-ph)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences
subject: 05C65, 68Q17, 68Q12, 15A69, 81P45

description: We present an upper bound on the exponent of the asymptotic behaviour of the tensor rank of a family of tensors defined by the complete graph on $k$ vertices. For $k\geq4$, we show that the exponent per edge is at most 0.77, outperforming the best known upper bound on the exponent per edge for matrix multiplication ($k=3$), which is approximately 0.79. We raise the question whether for some $k$ the exponent per edge can be below $2/3$, i.e. can outperform matrix multiplication even if the matrix multiplication exponent equals 2. In order to obtain our results, we generalise to higher order tensors a result by Strassen on the asymptotic subrank of tight tensors and a result by Coppersmith and Winograd on the asymptotic rank of matrix multiplication. Our results have applications in entanglement theory and communication complexity.
title: "Mathematik Neu Denken"
title: Impulse zur Neugestaltung der universitären Lernumgebung
titleType: AlternativeTitle
Creators: name: Spies, Susanne
name: Wickel, Gabriele
Publisher: name: Gesellschaft für Didaktik der Mathematik
Year: 2012
Subjects: subject: 510

description: Zentraler Baustein von "Mathematik Neu Denken" - einem Projekt zur Neuorientierung der gymnasialen Lehrerbildung an den Universitäten Gießen und Siegen - war die Umgestaltung traditioneller Lehr- und Lernformen. So wurden auch die Übungen zu hochschulmathematischen Vorlesungen des Grundstudiums unter dem Aspekt der Balance von Instruktion und Konstruktion konzipiert. An ausgewählten Beispielen werden Ansatz, Erfahrungen und Ergebnisse der Praxisphase des Siegener Teilprojekts diskutiert.
Constraint Control of Nonholonomic Mechanical Systems
Creators: name: Putkaradze, Vakhtang
name: Rogers, Stuart
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optimization and Control (math.OC)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 70Q05, 70E17, 70B10, 65L10, 65P99, 65-04, 49K15, 37J60, 70F25, 93B05, 93B40, 93C10, 93C15

description: We derive an optimal control formulation for a nonholonomic mechanical system using the nonholonomic constraint itself as the control. We focus on Suslov's problem, which is defined as the motion of a rigid body with a vanishing projection of the body frame angular velocity on a given direction $\boldsymbolξ$. We derive the optimal control formulation, first for an arbitrary group, and then in the classical realization of Suslov's problem for the rotation group $SO(3)$. We show that it is possible to control the system using the constraint $\boldsymbolξ(t)$ and demonstrate numerical examples in which the system tracks quite complex trajectories such as a spiral.
description: 48 pages, 9 figures
Taeniophyllum terrestre Kocyan & Schuit. 2013, comb. nov.
Creators: name: Kocyan, Alexander
name: Schuiteman, André
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Orchidaceae
Taeniophyllum
Taeniophyllum terrestre

description: Taeniophyllum terrestre (J.J.Sm.) Kocyan & Schuit., comb. nov.
 Basionym: Microtatorchis terrestris Smith (1929: 500).
description: Published as part of Kocyan, Alexander & Schuiteman, André, 2014, New combinations in Aeridinae (Orchidaceae), pp. 61-85 in Phytotaxa 161 (1) on page 74, DOI: 10.11646/phytotaxa.161.1.3, http://zenodo.org/record/5128794
Study on the diversity of phytoplasmas detected in European forests
Creators: name: Bertaccini, Assunta
Publisher: name: Zenodo
Year: 2023
Subjects: Euphresco, plant health, risk assessment, monitoring, biology, epidemiology, diagnostics, phytoplasmas, forest, vectors

description: Success story of the Euphresco project 2016-F-211 'Study on the diversity of phytoplasmas detected in European forests'
description: Project funded through the Euphresco network
Evaluación de la eficiencia y la calidad de la educación básica secundaria y media oficial del Departamento de Bolívar en el año 2011
Creators: name: Penso Martinez, Laura Daniela
name: Laguna Alemán, Martha Elena
Publisher: name: Universidad de Cartagena
Year: 2013
Subjects: Educación secundaria - Evaluación
Educación básica secundaria y media oficial - Calidad educativa

description: Tesis (Economista).--Universidad de Cartagena. Facultad de Ciencias Económicas. Programa de Economía, 2013
description: La presente investigación estima la eficiencia de las Instituciones Educativas oficiales del Departamento de Bolívar en el año 2011, empleando la orientación al output de la técnica no paramétrica –DEA- y haciendo uso de rendimientos variables a escala.
Nagaoka's theorem in the Holstein-Hubbard model
Creators: name: Miyao, Tadahiro
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Nagaoka's theorem on ferromagnetism in the Hubbard model is extended to the Holstein-Hubbard model. This shows that Nagaoka's ferromagnetism is stable even if the electron-phonon interaction is taken into account. We also prove that Nagaoka's ferromagnetism is stable under the influence of the quantized radiation field.
description: 23 pages. V3: Improved version, to appear in Annales Henri Poincare
Founded Semantics and Constraint Semantics of Logic Rules
Creators: name: Liu, Yanhong A.
name: Stoller, Scott D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Artificial Intelligence (cs.AI)
subject: Databases (cs.DB)
subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: Logic rules and inference are fundamental in computer science and have been studied extensively. However, prior semantics of logic languages can have subtle implications and can disagree significantly, on even very simple programs, including in attempting to solve the well-known Russell's paradox. These semantics are often non-intuitive and hard-to-understand when unrestricted negation is used in recursion. This paper describes a simple new semantics for logic rules, founded semantics, and its straightforward extension to another simple new semantics, constraint semantics, that unify the core of different prior semantics. The new semantics support unrestricted negation, as well as unrestricted existential and universal quantifications. They are uniquely expressive and intuitive by allowing assumptions about the predicates, rules, and reasoning to be specified explicitly, as simple and precise binary choices. They are completely declarative and relate cleanly to prior semantics. In addition, founded semantics can be computed in linear time in the size of the ground program.
Flexible Bayesian Quantile Regression in Ordinal Models
Creators: name: Rahman, Mohammad Arshad
name: Karnawat, Shubham
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: The paper introduces an estimation method for flexible Bayesian quantile regression in ordinal (FBQROR) models i.e., an ordinal quantile regression where the error follows a generalized asymmetric Laplace (GAL) distribution. The GAL distribution, unlike the asymmetric Laplace (AL) distribution, allows to fix specific quantiles while simultaneously letting the mode, skewness and tails to vary. We also introduce the cumulative distribution function (necessary for constructing the likelihood) and the moment generating function of the GAL distribution. The algorithm is illustrated in multiple simulation studies and implemented to analyze public opinion on homeownership as the best long-term investment in the United States.
description: 39 pages, 4 Figures
Pseudomelanactini Arnett 1967
Creators: name: Hoffmannova, Johana
name: Packova, Gabriela
name: Prosvirov, Alexander S.
name: Akhter, Muhammad Atique
name: Kundrata, Robin
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Elateridae

description: Tribe Pseudomelanactini Arnett, 1967
Pseudomelanactini Arnett, 1967. Type genus: Pseudomelanactes Mathieu, 1961 [synonym of Anthracalaus Fairmaire, 1888]. For more information, including synonyms, see Bouchard et al. (2011) and Kundrata et al. (2019a).
description: Published as part of Hoffmannova, Johana, Packova, Gabriela, Prosvirov, Alexander S., Akhter, Muhammad Atique & Kundrata, Robin, 2023, An updated catalogue of Agrypninae (Coleoptera: Elateridae) from Pakistan, pp. 281-305 in Zootaxa 5270 (2) on page 298, DOI: 10.11646/zootaxa.5270.2.6, http://zenodo.org/record/7864780
Quantum Simulation of Generic Many-Body Open System Dynamics Using Classical Noise
Creators: name: Chenu, Aurélia
name: Beau, Mathieu
name: Cao, Jianshu
name: del Campo, Adolfo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We introduce a scheme for the quantum simulation of many-body decoherence based on the unitary evolution of a stochastic Hamiltonian. Modulating the strength of the interactions with stochastic processes, we show that the noise-averaged density matrix simulates an effectively open dynamics governed by $k$-body Lindblad operators. Markovian dynamics can be accessed with white-noise fluctuations; non-Markovian dynamics requires colored noise. The time scale governing the fidelity decay under many-body decoherence is shown to scale as $N^{-2k}$ with the system size $N$. Our proposal can be readily implemented in a variety of quantum platforms including optical lattices, superconducting circuits and trapped ions.
description: 5 pages, 1 figure, 8 pages supplementary material. Published version
A Harder-Narasimhan theory for Kisin modules
Creators: name: Levin, Brandon
name: Wang-Erickson, Carl
Publisher: name: arXiv
Year: 2016
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 11S20 (primary), 14L24, 14G35 (secondary)

description: We develop a Harder-Narasimhan theory for Kisin modules generalizing a similar theory for finite flat group schemes due to Fargues. We prove the tensor product theorem, i.e., that the tensor product of semi-stable objects is again semi-stable. We then apply the tensor product theorem to the study of Kisin varieties for arbitrary connected reductive groups.
description: 51 pages, 4 figures. To appear in Algebraic Geometry
Caustics for Spherical Waves
Creators: name: de Rham, Claudia
name: Motohashi, Hayato
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the development of caustics in shift-symmetric scalar field theories by focusing on simple waves with an $SO(p)$-symmetry in an arbitrary number of space dimensions. We show that the pure Galileon, the DBI-Galileon, and the extreme-relativistic Galileon naturally emerge as the unique set of caustic-free theories, highlighting a link between the caustic-free condition for simple $SO(p)$-waves and the existence of either a global Galilean symmetry or a global (extreme-)relativistic Galilean symmetry.
description: 25 pages. v2: References added and included discussion on extreme-relativistic case. v3: Matches published version in PRD, appendix expanded
A note on discrete Borg-type theorems
Creators: name: Kumar, V. B. Kiran
name: Kumar, G. Krishna
Publisher: name: arXiv
Year: 2016
Subjects: subject: Spectral Theory (math.SP)
subject: FOS: Mathematics

description: We consider the discrete versions of the well known Borg theorem and use simple linear algebraic techniques to obtain new versions of the discrete Borg type theorems. To be precise, we prove that the periodic potential of a discrete Schrodinger operator is almost a constant if and only if the possible spectral gaps of the operator are of small width. This result is further extended to more general settings and the connection to the well known Ten Martini problem is also discussed.
Justicia como imparcialidad: Una concepción política que establece los fundamentos para mantener la tolerancia en las sociedades democráticas modernas
Creators: name: Cabarcas Herrera, Gustavo
Publisher: name: Universidad de Cartagena
Year: 2006
Subjects: Justicia social
Equidad distributiva
Justicia - Filosofía
Justicia distributiva

description: Tesis (Filósofo) -- Universidad de Cartagena. Facultad de Ciencias Humanas. Programa de Filosofía, 2006
description: El propósito en este trabajo consiste en presentar la concepción rawlsiana como una concepción política que pese a algunas debilidades se muestra como solución al problema de la incompatibilidad de concepciones del bien que convive entre sí en las sociedades contemporáneas.
The Jacquet-Langlands correspondence for overconvergent Hilbert modular forms
Creators: name: Birkbeck, Christopher
Publisher: name: arXiv
Year: 2016
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: We use results by Chenevier to interpolate the classical Jacquet-Langlands correspondence for Hilbert modular forms, which gives us an extension of Chenevier's results to totally real fields. From this we obtain an isomorphisms between eigenvarieties attached Hilbert modular forms and those attached to modular forms on a totally definite quaternion algebra over a totally real field of even degree.
description: 22 pages. Final Version, to appear in Int. J. Number Theory
Mono‐, Di‐, and Tri‐Valent Cation Doped BiFe0.95Mn0.05O3 Nanoparticles: Ferroelectric Photocatalysts
Creators: name: Dubey, Astita
name: Keat, Chin Hon
name: Shvartsman, Vladimir
name: Yusenko, Kirill
name: Escobar Castillo, Marianela
name: Guilherme Buzanich, Ana
name: Hagemann, Ulrich
name: Kovalenko, Sergey
name: Stähler, Julia
name: Lupascu, Doru C
Publisher: name: Humboldt-Universität zu Berlin
Year: 2022
Subjects: subject: bismuth ferrite
subject: ferroelectric
subject: nanoparticles
subject: photocatalysis
subject: piezoresponse
subject: polarization
subject: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten

description: The ferroelectricity of multivalent codoped Bismuth ferrite (BiFeO3; BFO) nanoparticles (NPs) is revealed and utilized for photocatalysis, exploiting their narrow electronic bandgap. The photocatalytic activity of ferroelectric photocatalysts BiFe0.95Mn0.05O3 (BFM) NPs and mono‐, di‐, or tri‐valent cations (Ag+, Ca2+, Dy3+; MDT) coincorporated BFM NPs are studied under ultrasonication and in acidic conditions. It is found that such doping enhances the photocatalytic activity of the ferroelectric NPs approximately three times. The correlation of the photocatalytic activity with structural, optical, and electrical properties of the doped NPs is established. The increase of spontaneous polarization by the mono‐ and tri‐valent doping is one of the major factors in enhancing the photocatalytic performance along with other factors such as stronger light absorption in the visible range, low recombination rate of charge carriers, and larger surface area of NPs. A‐site doping of BFO NPs by divalent elements suppresses the polarization, whereas trivalent (Dy3+) and monovalent (Ag+) cations provide an increase of polarization. The depolarization field in these single domain NPs acts as a driving force to mitigate recombination of the photoinduced charge carriers.
description: The ferroelectricity of Ag/Ca/Dy‐doped BiFe0.95Mn0.05O3 nanoparticles are utilized for photocatalysis under ultrasonic conditions. The mitigated recombination of photoinduced charge‐carriers in the nanoparticles due to the depolarization field, is one of the important factors for the photocatalytic rate. The piezoresponse becomes a crucial parameter under ultrasonic conditions for ferroelectric photocatalysts. The pink dye (rhodamine B) is photodegraded using MDT doped nanoparticles. The ease of photoinduced charge carrier separation in single domain nanoparticles using the depolarization field as a driving force is shown. image
Effects Of Performance Appraisal On Employee Motivation In The Case Of Major General Hayelom Areya Military Academy (Holeta)
Creators: name: Molla, Tesfaye
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: The main purpose of this study was to evaluate the effect of performance appraisal on employee motivation in the case of Major General Hayelom Areya Military Academy. Causal research design was used. As a result to analyze this relationship the researcher mainly deployed mixed type of research design. 151 respondents were selected representing a population of 243 using stratified random sampling in each department. Self-Administer Drop off survey data collection technique was used and Statistical Package for Social Science (SPSS) software version 22.0 was employed to analyze and present the data through the statistical tools, namely descriptive and inferential analysis. Performance appraisal did not motivated employees in the academy. Performance appraisal rating cannot be considered as a technique that has a pos i t ive effect on work performance and employee motivation. The performance appraisal identifies performance problems to improve employee motivation and job satisfaction. In general the research findings were Pas and PAM had appositive relation with employees' motivation. And PAM was more affects motivation than PAS in the academy. Unfair evaluation system and understanding of performance appraisal objectives were the major factors that reduce morale for performance at the academy. To encourage the commandants and other supervisors in developing fair evaluation systems to help provide well perform results and satisfaction for the staff of the military academy. Employees did not trust on the PAS, PAM and motivation factors of academies implementation; on its unfairness and less of good communication in the academy performance appraisal result become de-motivation, job dissatisfaction, absenteeism, and turnover would occur in the Academy.
Holographic equivalence between the first law of entanglement entropy and the linearized gravitational equations
Creators: name: Mosk, Benjamin
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We use the intertwining properties of integral transformations to provide a compact proof of the holographic equivalence between the first law of entanglement entropy and the linearized gravitational equations, in the context of the AdS/CFT-correspondence. We build upon the framework developed by Faulkner et al. [1] using the the Wald formalism, and exploit the symmetries of the vacuum modular Hamiltonian of ball-shaped boundary regions.
description: V4. 11 + 10 pages, 2 figures, in accordance with version as published in PRD
SUWAMAS, a decision support model for sustainable waste management systems
Creators: name: Marquez Oropeza, Eduardo
Publisher: name: Technische Universität Dortmund
Year: 2006
Subjects: subject: Sustainable waste management
subject: LCA
subject: CBA
subject: MCDA
subject: 660

description: SUWAMAS is a decision support model designed to deliver sustainable waste management strategies. Recommended strategies promote economic growth and social cohesion without impairing environmental quality. These strategies consider the integrated product policy approach and European waste management strategic drivers. SUWAMAS is designed to minimise unsustainable production and consumption patterns through the life cycle of the product system. The product system consists of recovery and disposal waste management operations such as mechanical, biological, mechanical-biological, incineration and landfill. Every waste management operation is modelled according to its installed choice of technology, operational conditions and technical requirements.
ER modelling from first relational principles
Creators: name: Doberkat, Ernst-Erich
name: Omodeo, Eugenio G.
Publisher: name: Universität Dortmund
Year: 2003
Subjects: subject: Entity-Relationship models (static and dynamic view)
subject: relational foundations of data modelling.
subject: relation algebra
subject: 004

description: Entity-Relationship modelling is a popular technique for data modelling. Despite its popularity and wide spread use, it lacks a firm semantic foundation. We propose a translation of an ER-model into relation algebra, suggesting that this kind of algebra does provide suitable mechanisms for establishing a formal semantics of Entity-Relationship modelling. The work reported on here deals first with the techniques necessary for the translation, thus constructing a static view of an ER-model in an abstract setting of what might be called logic without variables. We then undertake a detailed analysis of the insertion and deletion operations for an ER-model represented in terms of the relation calculus.
description: Internes Memorandum des Lehrstuhls für Software-Technologie / Fachbereich Informatik, Universität Dortmund ; 132
Proyecto de inversión para la ampliación y modernización del Aeropuerto las Brujas de la ciudad de Corozal
Creators: name: Perez Bravo, Filiberto
name: Torrenegra Saffar, Jaime
Publisher: name: Universidad de Cartagena
Year: 1991
Subjects: Inversiones Públicas
Aeropuerto las Brujas - (Corozal - Sucre) - Evaluación económica

description: Tesis (Economista).--Universidad de Cartagena. Facultad de Ciencias Económicas. Programa de Economía, 1991.
description: El presente estudio tiene por objeto determinar si existen las condiciones socioeconomicas para la ampliación y modernización del aeropuerto las Brujas de la ciudad de Corozal.