cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Acceleration of convergence to equilibrium in Markov chains by breaking detailed balance
Creators: name: Kaiser, Marcus
name: Jack, Robert L.
name: Zimmer, Johannes
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We analyse and interpret the effects of breaking detailed balance on the convergence to equilibrium of conservative interacting particle systems and their hydrodynamic scaling limits. For finite systems of interacting particles, we review existing results showing that irreversible processes converge faster to their steady state than reversible ones. We show how this behaviour appears in the hydrodynamic limit of such processes, as described by macroscopic fluctuation theory, and we provide a quantitative expression for the acceleration of convergence in this setting. We give a geometrical interpretation of this acceleration, in terms of currents that are \emph{antisymmetric} under time-reversal and orthogonal to the free energy gradient, which act to drive the system away from states where (reversible) gradient-descent dynamics result in slow convergence to equilibrium.
description: 27 pages, 8 figures
Construction Contract Administration Practices of the New Head Quarter Design-Build (DB) Project of Commercial Bank of Ethiopia
Creators: name: Bekele, Hirut
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: This project work is about the assessment on the practices of project contract administration of the New Head quarter Design-Build project of Commercial Bank of Ethiopia where the concept of contract administration comes a long way in the practices of project undertaking. Thus, the researcher came up with a major research gap of which the effectiveness of DB contract administration on the project's time, cost, quality management and variation of work . In addition, the researcher has further assessed whether this DB project contract Administration has become effective in terms of meeting its objectives of technology transfer and training through the contract administration.. The methodology was designed as semi-structured interviews, focus group discussion and site observation, then later descriptive analysis were made. Different kinds of secondary data were also greatly used as triangulation mechanism. The qualitative research came up with a finding that following the legal bindings, keeping confidentialities, having well experienced professionals on the project doing, is leading the undergoing project to be successful so far with regard to the well administered contract. Moreover, the advantage and disadvantage of the DB project contract Administration which has been newly introduced for the country is properly accessed
Properties of an $α$ particle in a Bohrium $270$ Nucleus under the Generalized Symmetric Woods-Saxon Potential
Creators: name: Lütfüoğlu, B. C.
name: Erdogan, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The energy eigenvalues and the wave functions of an $α$ particle in a Bohrium $270$ nucleus were calculated by solving Schrödinger equation for Generalized Symmetric Woods-Saxon potential. Using the energy spectrum by excluding and including the quasi-bound eigenvalues, entropy, internal energy, Helmholtz energy, and specific heat, as functions of reduced temperature were calculated. Stability and emission characteristics are interpreted in terms of the wave and thermodynamic functions. The kinetic energy of a decayed $α$ particle was calculated using the quasi-bound states, which is found close to the experimental value.
description: 11 pages, 6 figures, 2 Tables, SDUFBED 2017
Estudio de los hábitos y motivos de consumo de alimentos del estrato dos en la ciudad de Cartagena
Creators: name: Mejía Castro, Rene De Jesús
name: Polo Torres, José
Publisher: name: Universidad de Cartagena
Year: 2001
Subjects: Investigación de mercados
Mercadeo

description: Tesis (Administrador de Empresas). -- Universidad de Cartagena. Facultad de Ciencias Económicas. Programa de Administración de Empresas 2001
description: El presente estudio tiene por objeto determinar y evaluar los hábitos y motivos de consumo de alimentos de las familias de los barrios de estrato dos de la ciudad de Cartagena, mediante un estudio de mercadeo que permita formular planes para la toma de decisiones.
La cotidianidad musical en el fortalecimiento de los valores convivenciales en niños de 5 años del CDI, ciudad del Bicentenario de Cartagena.
Creators: name: Hernández Rodríguez, Karen
name: Pérez Tovar, Cindy
Publisher: name: Universidad de Cartagena
Year: 2016
Subjects: Filosofía de la educación
Filosofía de la educación - Colombia
Valores morales

description: Tesis (Licenciado en Pedagogía Infantil) -- Universidad de Cartagena en convenio con la Universidad del Tolima. Facultad de Ciencias Sociales. Programa de Licenciatura en Pedagogía Infantil, 2016
description: Este trabajo tiene como objetivo desarrollar un proceso musical educativo para el fortalecimiento de valores como el respeto y la tolerancia en los niños y niñas en estado de vulnerabilidad del CDI ciudad del bicentenario de Cartagena.
title: Das Vierfarbenspiel
title: Endliche Geometrie spielerisch erfahren
titleType: AlternativeTitle
Creators: name: Röder, Norbert
Publisher: name: Gesellschaft für Didaktik der Mathematik
Year: 2007
Subjects: subject: 510

description: Es wird ein Spiel bestehend aus 15 Farbscheiben vorgestellt, bei dem verschiedene Aufgaben zu lösen sind, welche die Eigenschaften einer wohlbekannten Struktur der endlichen Geometrie widerspiegeln. Dabei sind keinerlei Kenntnisse des mathematischen Hintergrunds notwendig.
Derived Categories
Creators: name: Yekutieli, Amnon
Publisher: name: arXiv
Year: 2016
Subjects: subject: Category Theory (math.CT)
subject: Algebraic Geometry (math.AG)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics
subject: 18E30 (Primary) 18G10, 16E45 ( Secondary)

description: This is the fourth (and last) prepublication version of a book on derived categories, that will be published by Cambridge University Press. The purpose of the book is to provide solid foundations for the theory of derived categories, and to present several applications of this theory in commutative and noncommutative algebra. The emphasis is on constructions and examples, rather than on axiomatics. Here are the topics covered in the book: - A review of standard facts on abelian categories. - Differential graded algebra (DG rings, DG modules, DG categories and DG functors). - Triangulated categories and triangulated functors between them. How they arise from the DG background. The homotopy category K(A,M) of DG A-modules in M. - Localization of categories. The derived category D(A,M), which is the localization of K(A,M) with respect to the quasi-isomorphisms. - Left and right derived functors of a triangulated functor. - K-injective, K-projective and K-flat DG modules. Their roles, and their existence in several important algebraic situations. - Dualizing and residue complexes over commutative noetherian rings, including Van den Bergh rigidity. - Perfect DG modules and tilting DG bimodules over NC (noncommutative) DG rings. - NC connected graded rings, including Artin-Schelter regular rings. Derived torsion for NC connected graded rings, its relation to the chi condition of Artin-Zhang, and the NC MGM Equivalence. Balanced dualizing complexes, their uniqueness, existence and trace functoriality. - NC rigid dualizing complexes, following Van den Bergh. The uniqueness and existence of these complexes, a few examples, and their relation to Calabi-Yau rings. Readers of this preview version are urged to write to the author with any comments regarding errors, suggestions or questions.
description: Fourth (and last) prepublication version. To be published by CUP. This version: 459 pages, many changes (large and small)
Estudio evaluativo de la cooperativa de trabajo y producción agrícola de Bayunca y proyecto para la ampliación de su cobertura
Creators: name: Benito Revollo, Cruz Mariela
name: González Anaya, Fatima
Publisher: name: Universidad de Cartagena
Year: 1981
Subjects: Cooperativas
Cooperativa de trabajo y producción agricola de Bayunca - Estudio evaluativo

description: Tesis (Economista).--Universidad de Cartagena. Facultad de Ciencias Económicas. Programa de Economía, 1981
description: El presente trabajo tiene como objetivo, fortalecer el programa educacional y dar ímpetu a las secciones de producción y comercialización, para así resolver en forma acelerada los problemas de esta población.
EVALUATION OF PREHARVEST SPROUTING IN A DIVERSE PANEL OF QUINOA (Chenopodium Quinoa Willd.)
Creators: name: Ocana Gallegos, Cristina Dominique
Publisher: name: Washington State University
Year: 2022
Subjects: subject: GWAS
subject: PHS
subject: preharvest sprouting
subject: Quinoa
subject: Bioinformatics
subject: FOS: Computer and information sciences

description: The introduction of quinoa to new growing regions and environments is of interest to farmers, consumers, and stakeholders around the world. Many plant breeding programs have already
description: started to adapt quinoa to the environmental and agronomic conditions of their local fields. In the
description: Pacific Northwest of the USA, these breeding efforts started in 2010, but factors like preharvest
description: sprouting, waterlogging, and biotic stresses haltered quinoa production at commercial scale.
description: Preharvest sprouting (PHS) is undesirable sprouting of seeds that occurs before harvest and is
description: triggered by rain or humid conditions. PHS is responsible for yield losses and lower nutrition in
description: cereal grains. PHS has been extensively studied in wheat, barley, and rice, but there are limited
description: reports for quinoa. This study aimed to better understand PHS in quinoa through assessment of
description: the trait in a diversity panel (N=336). A scoring scale specific for panicles was developed to
description: quantify sprouting and the resulting phenotypes were used to create a PHS-tolerance ranking and
description: to perform GWAS analysis. Our findings indicate that PHS occurs at varying degrees across the
description: quinoa germplasm and that it is possible to access PHS-tolerance from natural sources.
description: Ultimately, these genotypes will be used as parental lines in future breeding programs aiming to
description: incorporate tolerance to PHS.
Random number generation with cosmic photons
Creators: name: Wu, Cheng
name: Bai, Bing
name: Liu, Yang
name: Zhang, Xiaoming
name: Yang, Meng
name: Cao, Yuan
name: Wang, Jianfeng
name: Zhang, Shaohua
name: Zhou, Hongyan
name: Shi, Xiheng
name: Ma, Xiongfeng
name: Ren, Ji-Gang
name: Zhang, Jun
name: Peng, Cheng-Zhi
name: Fan, Jingyun
name: Zhang, Qiang
name: Pan, Jian-Wei
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Random numbers are indispensable for a variety of applications ranging from testing physics foundation to information encryption. In particular, nonlocality tests provide a strong evidence to our current understanding of nature -- quantum mechanics. All the random number generators (RNG) used for the existing tests are constructed locally, making the test results vulnerable to the freedom-of-choice loophole. We report an experimental realization of RNGs based on the arrival time of cosmic photons. The measurement outcomes (raw data) pass the standard NIST statistical test suite. We present a realistic design to employ these RNGs in a Bell test experiment, which addresses the freedom-of-choice loophole.
description: 6 pages, 4 figures, plus Supplemental Material
Caracterización de la estructura de costos de los comercios minoristas en la ciudad de Cartagena de Indias
Creators: name: Anaya De Alba, Gina María
name: Gómez Zarate, Eisser Emiro
Publisher: name: Universidad de Cartagena
Year: 2013
Subjects: Mercadeo;
Análisis de mercado

description: Tesis (Especialista en Finanzas) -- Universidad de Cartagena. Facultad de ciencias económicas. Especialización en finanzas, 2013
description: El crecimiento empresarial y las políticas de mejoramiento de las condiciones de los sectores productivos de la economía, son temas de constante desarrollo y análisis por parte de diversos actores académicos en pro de la generación de nuevo material teórico que promueva la proposición de estrategias de mejoramiento del entorno empresarial a nivel local y nacional.Teniendo en cuenta lo anterior, el presente documento nace con la intención de poder estudiar el sector de comercios minoristas de la ciudad de Cartagena de Indias como una alternativa de análisis más para promover el desarrollo empresarial local, desde una de las actividades de mayor dinámica a nivel de barrios, comunas y localidad dentro del distrito. La primera parte del documento muestra la problemática actual del sector, así como los factores de importancia que dan pie a esta investigación. Luego se muestran algunos planteamientos teóricos y empíricos que son el resultado de estudios y análisis previos. Por último, se muestra la forma metodológica en que serán alcanzados los resultados propuestos en cada uno de los objetivos de esta investigación
BET on Independence
Creators: name: Zhang, Kai
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistics Theory (math.ST)
subject: Machine Learning (cs.LG)
subject: Computation (stat.CO)
subject: Methodology (stat.ME)
subject: Machine Learning (stat.ML)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We study the problem of nonparametric dependence detection. Many existing methods may suffer severe power loss due to non-uniform consistency, which we illustrate with a paradox. To avoid such power loss, we approach the nonparametric test of independence through the new framework of binary expansion statistics (BEStat) and binary expansion testing (BET), which examine dependence through a novel binary expansion filtration approximation of the copula. Through a Hadamard transform, we find that the symmetry statistics in the filtration are complete sufficient statistics for dependence. These statistics are also uncorrelated under the null. By utilizing symmetry statistics, the BET avoids the problem of non-uniform consistency and improves upon a wide class of commonly used methods (a) by achieving the minimax rate in sample size requirement for reliable power and (b) by providing clear interpretations of global relationships upon rejection of independence. The binary expansion approach also connects the symmetry statistics with the current computing system to facilitate efficient bitwise implementation. We illustrate the BET with a study of the distribution of stars in the night sky and with an exploratory data analysis of the TCGA breast cancer data.
Sub-exponential decay of eigenfunctions for some discrete Schrödinger operators
Creators: name: Mandich, Marc-Adrien
Publisher: name: arXiv
Year: 2016
Subjects: subject: Spectral Theory (math.SP)
subject: Mathematical Physics (math-ph)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Following the method of Froese and Herbst, we show for a class of potentials V that an eigenfunction $ψ$ with eigenvalue E of the multi-dimensional discrete Schrödinger operator H = $Δ$ + V on \mathbb{Z}^d decays sub-exponentially whenever the Mourre estimate holds at E. In the one-dimensional case we further show that this eigenfunction decays exponentially with a rate at least of cosh^{--1}((E -- 2)/($θ$\_E -- 2)), where $θ$\_E is the nearest threshold of H located between E and 2. A consequence of the latter result is the absence of eigenvalues between 2 and the nearest thresholds above and below this value. The method of Combes-Thomas is also reviewed for the discrete Schrödinger operators.
Compressive Computed Tomography Reconstruction through Denoising Approximate Message Passing
Creators: name: Perelli, Alessandro
name: Lexa, Michael
name: Can, Ali
name: Davies, Mike E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Optimization and Control (math.OC)
subject: Computational Physics (physics.comp-ph)
subject: Medical Physics (physics.med-ph)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: X-ray Computed Tomography (CT) reconstruction from a sparse number of views is a useful way to reduce either the radiation dose or the acquisition time, for example in fixed-gantry CT systems, however this results in an ill-posed inverse problem whose solution is typically computationally demanding. Approximate Message Passing (AMP) techniques represent the state of the art for solving under-sampling Compressed Sensing problems with random linear measurements but there are still not clear solutions on how AMP should be modified and how it performs with real world problems. This paper investigates the question of whether we can employ an AMP framework for real sparse view CT imaging? The proposed algorithm for approximate inference in tomographic reconstruction incorporates a number of advances from within the AMP community, resulting in the Denoising Generalized Approximate Message Passing CT algorithm (D-GAMP-CT). Specifically, this exploits the use of sophisticated image denoisers to regularize the reconstruction. While in order to reduce the probability of divergence the (Radon) system and Poisson non-linear noise model are treated separately, exploiting the existence of efficient preconditioners for the former and the generalized noise modelling in GAMP for the latter. Experiments with simulated and real CT baggage scans confirm that the performance of the proposed algorithm outperforms statistical CT optimization solvers.
description: 38 pages, 16 figures, to be published in SIAM Journal on Imaging Sciences
Selenoprotein M is expressed during bone development
Creators: name: Grosch, Melanie
name: Fuchs, Jennifer
name: Bösl, Michael
name: Winterpacht, Andreas
name: Tagariello, Andreas
Publisher: name: Technische Universität Dortmund
Year: 2013
Subjects: subject: selenium
subject: selenoproteins
subject: Kashin-Beck osteoarthropathy
subject: bone development
subject: thiol-disulfide oxidoreductase
subject: unfolded protein response
subject: 610

description: 25 selenoproteins that contain selenium, incorporated as selenocysteine (Sec), have been identified to date. Selenoprotein M (SELM) is one of seven endoplasmic reticulum (ER)-resident, Sec-containing proteins that may be involved in posttranslational processing of proteins and maintenance of ER function. Since SELM was overrepresented in a cartilage- and bone- specific expressed sequence tag (EST) library, we further investigated the expression pattern of Selm and its possible biological function in the skeleton. RNA in situ hybridization of Selm in chicken and mice of different developmental stages revealed prominent expression in bones, specifically in osteoblast, and in tendons. This result suggests that SELM functions during bone development, where it is possibly involved in the processing of secreted proteins.
description: EXCLI Journal ; Vol. 12, 2013
Bounds on solutions of the rotating, stratified, incompressible, non-hydrostatic, three-dimensional Boussinesq equations
Creators: name: Gibbon, John D.
name: Holm, Darryl D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We study the three-dimensional, incompressible, non-hydrostatic Boussinesq fluid equations, which are applicable to the dynamics of the oceans and atmosphere. These equations describe the interplay between velocity and buoyancy in a rotating frame. A hierarchy of dynamical variables is introduced whose members $Ω_{m}(t)$ ($1 \leq m < \infty$) are made up from the respective sum of the $L^{2m}$-norms of vorticity and the density gradient. Each $Ω_{m}(t)$ has a lower bound in terms of the inverse Rossby number, $Ro^{-1}$, that turns out to be crucial to the argument. For convenience, the $Ω_{m}$ are also scaled into a new set of variables $D_{m}(t)$. By assuming the existence and uniqueness of solutions, conditional upper bounds are found on the $D_{m}(t)$ in terms of $Ro^{-1}$ and the Reynolds number $Re$. These upper bounds vary across bands in the $\{D_{1},\,D_{m}\}$ phase plane. The boundaries of these bands depend subtly upon $Ro^{-1}$, $Re$, and the inverse Froude number $Fr^{-1}$. For example, solutions in the lower band conditionally live in an absorbing ball in which the maximum value of $Ω_{1}$ deviates from $Re^{3/4}$ as a function of $Ro^{-1},\,Re$ and $Fr^{-1}$.
description: 24 pages, 3 figures and 1 table
Níquel en cavidad oral de individuos con aparatología ortodóncica fija y sin hiperplasia gingival
Creators: name: Gómez Arcila, Verónica
Publisher: name: Universidad de Cartagena
Year: 2012
Subjects: Enfermedades de las encías
Gingivitis
Placa Bacteriana - Dientes

description: Tesis (Odontólogo).-- Universidad de Cartagena. Facultad de Odontología, 2012
description: Dentro de esta investigación, se busca identificar la presencia de níquel en saliva, placa dental y encía de individuos con aparatología ortodóncica fija con y sin hiperplasia gingival
Quantum centipedes with strong global constraint
Creators: name: Grange, Pascal
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: A centipede made of $N$ quantum walkers on a one-dimensional lattice is considered. The distance between two consecutive legs is either one or two lattice spacings, and a global constraint is imposed: the maximal distance between the first and last leg is $N+1$. This is the strongest global constraint compatible with walking. For an initial value of the wave function corresponding to a localized configuration at the origin, the probability law of the first leg of the centipede can be expressed in closed form in terms of Bessel functions. The dispersion relation and the group velocities are worked out exactly. Their maximal group velocity goes to zero when $N$ goes to infinity, which is in contrast with the behaviour of group velocities of quantum centipedes without global constraint, which were recently shown by Krapivsky, Luck and Mallick to give rise to ballistic spreading of extremal wave-front at non-zero velocity in the large-$N$ limit. The corresponding Hamiltonians are implemented numerically, based on a block structure of the space of configurations corresponding to compositions of the integer $N$. The growth of the maximal group velocity when the strong constraint is gradually relaxed is explored, and observed to be linear in the density of gaps allowed in the configurations. Heuristic arguments are presented to infer that the large-$N$ limit of the globally constrained model can yield finite group velocities provided the allowed number of gaps is a finite fraction of $N$.
description: 8 pages, LaTeX; v2: 18 pages, 4 figures, extension to more general configurations, numerical checks added
Montessori und die zeitgenössische Mathematikdidaktik
Creators: name: Amiras, Lucas
Publisher: name: Gesellschaft für Didaktik der Mathematik
Year: 2014
Subjects: subject: 510

description: Nach einem kritischen Blick auf die Schwierigkeiten beim Lehren und Lernen von Mathematik in der Schule werden grundsätzliche Aspekte der Montessori-Methode betrachtet und mit der Philosophie der modernen Mathematikdidaktik verglichen. Es folgen kritische Fragen zur Methode, die exemplarisch erörtert werden, bevor ein Plädoyer für einen Dialog gehalten wird.
Perturbed black holes in Einstein-dilaton-Gauss-Bonnet gravity: Stability, ringdown, and gravitational-wave emission
Creators: name: Blázquez-Salcedo, Jose Luis
name: Macedo, Caio F. B.
name: Cardoso, Vitor
name: Ferrari, Valeria
name: Gualtieri, Leonardo
name: Khoo, Fech Scen
name: Kunz, Jutta
name: Pani, Paolo
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Gravitational waves emitted by distorted black holes---such as those arising from the coalescence of two neutron stars or black holes---carry not only information about the corresponding spacetime but also about the underlying theory of gravity. Although general relativity remains the simplest, most elegant and viable theory of gravitation, there are generic and robust arguments indicating that it is not the ultimate description of the gravitational universe. Here we focus on a particularly appealing extension of general relativity, which corrects Einstein's theory through the addition of terms which are second order in curvature: the topological Gauss-Bonnet invariant coupled to a dilaton. We study gravitational-wave emission from black holes in this theory, and {\bf(i)} find strong evidence that black holes are linearly (mode) stable against both axial and polar perturbations; {\bf(ii)} discuss how the quasinormal modes of black holes can be excited during collisions involving black holes, and finally {\bf(iii)} show that future ringdown detections with large signal-to-noise ratio would improve current constraints on the coupling parameter of the theory.
description: 15 pages, 4 figures. v2: Typos Corrected. Published in in Physical Review D. v3: Typos corrected in Table II
Broadscale distribution, abundance, and habitat associations of the invasive Asian clam (Corbicula fluminea) in the lower Columbia River, USA
Creators: name: Robb-Chavez, Salvador
Publisher: name: Washington State University
Year: 2022
Subjects: AIS
Columbia River
Corbicula
Generalized Linear Regression
Habitat
Invasive Species
Biology

description: The Asian clam, Corbicula fluminea, is an invasive freshwater bivalve that has established populations across the globe and is known to have deleterious effects on natural and human systems. Yet, despite being present in the Columbia River (CR) for nearly a century, little is known about this invader’s basic biology and ecology in this large river system. Thus, we undertook a field study to assess its i) broadscale distribution and abundance, ii) associations with habitat characteristics, and iii) weight-at-length relationship in the lower CR. During 2019-21, C. fluminea were collected from 27 shore-based and 15 mid-channel stations spanning 481 river kilometers (RKM) of the lower CR, along with several habitat characteristics (bank slope, temperature, dissolved oxygen, pH, salinity, conductivity, depth, Secchi depth, chlorophyll-a concentration, river kilometer, and sediment composition). C. fluminea abundance ranged from 0-430 ind. m-2, with the majority of sites containing abundances >100 ind. m-2, located downstream from Bonneville Dam and the majority of sites containing abundances of 0 ind. m-2 located upstream. Generalized linear models predicting the abundance of C. fluminea indicated significantly positive correlations with water temperature, % sand and river kilometer, and negative correlations with bank slope and sedimentary organic material. Clams occurring upstream of Bonneville Dam exhibited greater weight-at-length than those occurring downstream. Our investigation represents the greatest spatial extent at which C. fluminea has been studied in the CR and our results provide a better understanding of the basic biology and ecology of this global invader, as well as providing natural resource managers with information on habitat conditions favorable for this invasive bivalve within temperate river ecosystems.
Optimales Anlagevermögen von Versicherungsunternehmen
Creators: name: Pelster, Matthias
name: Kaposty, Florian
Publisher: name: Technische Universität Dortmund
Year: 2014
Subjects: subject: Risikomanagement
subject: Solvency II
subject: Value at Risk
subject: Terminabsicherung
subject: Anlageentscheidung
subject: 330

description: Versicherungsunternehmen (VU) unterliegen detaillierten regulatorischen Vorschriften und werden in besonderem Maße behördlich beaufsichtigt. Gegenwärtig erfolgt die Einführung einheitlicher europäischer Regulierungsvorschriften im Rahmen des Projekts Solvency II, wodurch die aufsichtsrechtlichen Anforderungen an VU im EU-weiten Binnenversicherungsmarkt harmonisiert werden sollen. Ziel des Beitrags ist die Bestimmung des optimalen Anlagevermögens eines im Marktumfeld von Solvency II agierenden VU.
description: Insurers are subject to elaborate regulation. Currently the EU implements the Solvency II Directive that codifies and harmonizes the EU insurance regulation. Our contribution analyzes the optimal invested capital of an insurance company subject to the Solvency II Directive.
description: Working Paper;1/2014
Multiscale thermodynamics of charged mixtures
Creators: name: Vágner, Petr
name: Pavelka, Michal
name: Oğul, ##!Error: Attribute  Unknown!##
Publisher: name: Weierstrass Institute
Year: 2020
Subjects: subject: GENERIC
subject: electrodynamics
subject: continuum mechanics
subject: non-equilibrium thermodynamics
subject: polarization
subject: magnetization
subject: multiscale modeling
subject: hamiltonian mechanics
subject: 78A25
subject: 35Q61
subject: 82B35

description: A multiscale theory of interacting continuum mechanics and thermodynamics of mixtures of fluids, electrodynamics, polarization and magnetization is proposed. The mechanical (reversible) part of the theory is constructed in a purely geometric way by means of semidirect products. This leads to a complex Hamiltonian system with a new Poisson bracket, which can be used in principle with any energy functional. The thermodynamic (irreversible) part is added as gradient dynamics, generated by derivatives of a dissipation potential, which makes the theory part of the GENERIC framework. Subsequently, Dynamic MaxEnt reductions are carried out, which lead to reduced GENERIC models for smaller sets of state variables. Eventually, standard engineering models are recovered as the low-level limits of the detailed theory. The theory is then compared to recent literature.
Comportamientos ilícitos y mecanismos de control social en el Bolívar grande 1886-1905
Creators: name: Bravo Páez, Ivonne
Publisher: name: Universidad de Cartagena
Year: 1998
Subjects: Región de la Costa Caribe
Historia

description: Tesis (Historiador) -- Universidad de Cartagena. Facultad de Ciencias Humanas. Programa de Historia, 1998
description: Los comportamientos ilícitos y los mecanismos de control social contribuyen un aspectos de la cultura regional costeña inexplorado aún por la historiografía nacional, no obstante que para el caso de otras regiones se han realizados estudios importantes que convocan a nuevas posibilidades investigativas para ampliar la comprensión de las bases culturales que nos forman. En este sentido son pioneros los aportes de Jaime Jaramillo Uribe y Germán Colmenares, quienes han estimulado otros esfuerzos más recientes, enfocados al tratamiento de temas no abordados por la historiografía tradicional, relacionados con el desorden social, el crimen y la delincuencia, especialmente a través del estudio de procesos judiciales que han resultado reveladores de costumbres y valores sociales.
Impact of Soft Project Management Skills on Deliverables of Project Team: Case Study of Projects of Kifiya Financial Technology
Creators: name: Seyoum, Yared
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: This study has three primary objectives of this study is to find evidence that there is relationship between soft skills and project team deliverables, examine the existence of relationship between soft project management skills and project team deliverables, and identify which of the soft skills impacting most project teams' deliverables. To answer these questions a questionnaire was developed and disseminated among project employees of Kifiya Financial Technology. As per response obtained from project team members it was able to fit bivariate ordinal regression model and correlation analysis to see if there was relationship between soft project management skills and project team deliverables. It resulted in positive relationship but to answer the other questions multivariate regression model was used and found the coefficients to be 0.973, 2.147, 1.554, and 2.307 for leadership, conflict management, communication and team building respectively. These coefficients mean, one unit increase in the predictor result the response variable level on log-odds scale to change by its respective regression coefficient while holding other variables constant. From this model we have found that team building to have influence the most on project deliverability and leadership skill has the least influence. This study has concluded that soft project management skills have significant effect in deliverability of project team accordingly, focus should be given to in enhancing soft skills of project management and further study regarding soft project management skills incorporating additional attributes in IT industry or other should be conducted to uncover more unanswered questions.
THERMAL RESISTANCE NETWORK FOR THE DESIGN AND TESTING OF A LIQUID HYDROGEN VAPOR COOLED SHIELDED FUEL TANK
Creators: name: Crabb, Chelsea
Publisher: name: Washington State University
Year: 2022
Subjects: Drone
Electrolysis
Fuel cell
Hydrogen
Thermal model

description: Interest in the science, and potential applications, of liquid hydrogen is expanding quickly. This need is largely driven by the climate crisis in an effort to reduce carbon emissions through the use of alternative energy sources and energy carriers. One such newly designed and manufactured application is the use of a lightweight, additively manufactured liquid hydrogen fuel tank for hydrogen powered UAVs. In addition to zero carbon emissions, the fuel cell powered drone makes significantly less noise in flight. This is important as it allows for reconnaissance drones to fly with less chance of detection. This thesis presents a thermal model used to estimate the upper and lower limits of theoretically expected boil-off rates for an additively manufactured liquid hydrogen fuel tank designed to mechanically integrate into the ScanEagle3 drone by Insitu. The purpose for the model is to investigate anomalous experimental data retrieved during initial boiloff validation and testing. The model will also provide a better understanding of the thermal behavior of the tank given various geometric and material constraints. Upon determining best- and worst-case scenarios from the thermal model calculations, it is shown that the primary source of thermal transport is via gaseous hydrogen convection flowing within the insulation layers. Testing is completed on a mechanical redesign which confirms successful isolation of the insulation layers from hydrogen in-leaks. The motivation for a redesign, experimental set-up, and the impacts on associated boiloff rates are discussed.
Influencia de las glándulas de secreción interna en los dientes y tejidos orales
Creators: name: Martínez Martínez, Adaulfo
Publisher: name: Universidad de Cartagena
Year: 1957
Subjects: Glándulas endocrinas - Enfermedades - Diagnóstico
Tiroides

description: Tesis (Odontólogo).-- Universidad de Cartagena. Facultad de Odontología,1957
description: Dentro de esta investigación, se busca presentar la influencia de las glándulas endocrina o de secreciòn interna en los dientes y tejidos orales
title: Communicating with Optical Hyperchaos
title: Information Encryption and Decryption in Delayed Nonlinear Feedback Systems
titleType: AlternativeTitle
Creators: name: Goedgebuer, Jean-Pierre
name: Larger, Laurent
name: Rhodes, William T.
name: Udaltsov, Vladimir S.
Publisher: name: The American Physical Society
Year: 2001
Subjects: subject: 530

description: Physical Review Letters
Revealing the source of the radial flow patterns in proton--proton collisions using hard probes
Creators: name: Ortiz, Antonio
name: Bencédi, Gyula
name: Bello, Héctor
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this work, we propose a tool to reveal the origin of the collective-like phenomena observed in proton--proton collisions. We exploit the fundamental difference between the underlying mechanisms, color reconnection (CR) and hydrodynamics, which produce radial flow patterns in \textsc{Pythia}~8 and \textsc{Epos}~3, respectively. Specifically, we proceed by examining the strength of the coupling between the soft and hard components which, by construction, is larger in \textsc{Pythia}~8 than in \textsc{Epos}~3. We study the transverse momentum ($p_{\rm T}$) distributions of charged pions, kaons and (anti)protons in inelastic pp collisions at $\sqrt{s}=$ 7\,TeV produced at mid-rapidity. Specific selections are made on an event-by-event basis as a function of the charged particle multiplicity and the transverse momentum of the leading jet ($p_{\rm T}^{\rm jet}$) reconstructed using the \textsc{FastJet} algorithm at mid-pseudorapidity ($|η|<1$). From our studies, quantitative and qualitative differences between \textsc{Pythia}~8 and \textsc{Epos}~3 are found in the $p_{\rm T}$ spectra when (for a given multiplicity class) the leading jet $p_{\rm T}$ is increased. In addition, we show that for low-multiplicity events the presence of jets can produce radial flow-like behavior. Motivated by our findings, we propose to perform a similar analysis using experimental data from RHIC and LHC.
description: 16 pages, 6 figures. The text was significantly modified and extended. One figure was removed whereas some were slightly modified. References were corrected and updated. The final version of this paper appears in Journal of Physics G (Nuclear and Particle Physics)
Representaciones sociales de estudiantes de educación media sobre sexualidad: Perspectiva biopsicosocial
Creators: name: Yances Padilla, Jennys Yecenia
Publisher: name: Universidad de Cartagena
Year: 2019
Subjects: Educación y cultura - Aspectos sociales
Política educativa
Educación sexual
Sexualidad - Aspectos sociales

description: Tesis (Doctorado en Ciencias de la Educación) -- Universidad de Cartagena. Doctorado en Ciencias de la Educación, 2019.
description: Influencia de las políticas educativas sobre educación sexual definidas para el nivel educativo de básica y media, en la construcción de representaciones sociales de estudiantes de tres instituciones en el departamento de Córdoba, a su vez, analizar las políticas educativas sobre educación sexual definidas para el nivel educativo de la educación media en el sistema educativo colombiano, identificando las representaciones sociales sobre sexualidad en estudiantes y contrastar estas representaciones con los discursos presentes en las políticas educativas sobre educación sexual.
Fully stable cosmological solutions with a non-singular classical bounce
Creators: name: Ijjas, Anna
name: Steinhardt, Paul J.
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 recently showed how it is possible to use a cubic Galileon action to construct classical cosmological solutions that enter a contracting null energy condition (NEC) violating phase, bounce at finite values of the scale factor and exit into an expanding NEC-satisfying phase without encountering any singularities or pathologies. A drawback of these examples is that singular behavior is encountered at some time either just before or just after the NEC-violating phase. In this Letter, we show that it is possible to circumvent this problem by extending our method to actions that include the next order ${\cal L}_4$ Galileon interaction. Using this approach, we construct non-singular classical bouncing cosmological solutions that are non-pathological for all times.
description: 6 pages, 4 figures. Version 5 contains minor corrections to coefficients in the first paragraph of Sec. 5 and to the labeling in Fig 2
Erratum: Astronomical Constraints on the Cosmic Evolution of the Fine Structure Constant and Possible Quantum Dimensions [Phys. Rev. Lett. 85, 5511 (2000)]
Creators: name: Briggs, F.
name: Carilli, C. L.
name: Conway, J.
name: Menten, K. M.
name: Moore, C. P.
name: Perlman, E.
name: Stocke, J. T.
name: Vermeulen, R.
name: De Bruyn, A. G.
Publisher: name: The American Physical Society
Year: 2001
Subjects: subject: 530

description: Physical Review Letters
Pion transverse-momentum spectrum, elliptic flow, and Hanbury-Brown-Twiss interferometry in a viscous granular source model
Creators: name: Yang, Jing
name: Zhang, Wei-Ning
name: Ren, Yan-Yu
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We examine the evolution of quark-gluon plasma (QGP) droplets with viscous hydrodynamics and analyze the pion transverse-momentum spectrum, elliptic flow, and Hanbury-Brown-Twiss (HBT) interferometry in a granular source model consisting of viscous QGP droplets. The shear viscosity of the QGP droplet speeds up and slows down the droplet evolution in the central and peripheral regions of the droplet, respectively. The effect of the bulk viscosity on the evolution is negligible. Although there are viscous effects on the droplet evolution, the pion momentum spectrum and elliptic flow change little for granular sources with and without viscosity. On the other hand, the influence of viscosity on HBT radius $R_{\rm out}$ is considerable. It makes $R_{\rm out}$ decrease in the granular source model. We determine the model parameters of granular sources using the experimental data of pion transverse-momentum spectrum, elliptic flow, and HBT radii together, and investigate the effects of viscosity on the model parameters. The results indicate that the granular source model may reproduce the experimental data of pion transverse-momentum spectrum, elliptic flow, and HBT radii in heavy-ion collisions of Au-Au at $\sqrt{s_{NN}}=200$ GeV and Pb-Pb at $\sqrt{s_{NN}}=2.76$ TeV in different centrality intervals. The viscosity of the droplet leads to an increase in the initial droplet radius and a decrease of the source shell parameter in the granular source model.
description: 15 pages, 7 figures, the revised version is for publication in Chinese Physics C
The Effectiveness Of Monitoring And Evaluation Systems: The Case Of Non-Governmental Organizations Implementing Agricultural Development Projects In Ethiopia
Creators: name: Wolde, Elias
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: The main objective of the study was to assess the effectiveness of M&E systems in agricultural NGOs in Ethiopia. It also assessed the effectiveness in the use of M&E tools and techniques; perceptions towards M&E practices; factors affecting effectiveness of M&E systems; and effectiveness of M&E systems in supporting learning. The study took a form of descriptive design. The cross-sectional study employed quantitative methods that involved a survey of 88 randomly selected agriculture-oriented NGOs that are affiliated to three consortium organizations. Univariate statistics and linear regression methods were used to analyze the data. The results demonstrated that M&E systems were partly traditional despite the popularity of some of the Results-Based Management tools. M&E practices tend to be donor-driven as reflected by the main purposes they served, high ability to meet donors' accountability concerns, and high involvement of donors. Findings also indicated that improper allocation of budget for M&E, minimal use of information systems in M&E, and low involvement of beneficiaries in M&E processes. The effectiveness of M&E systems in the organizations were positively and largely affected by the use of information systems, stakeholder involvement, and human resource capacities. The findings also suggested that many of the organizations lacked strong orientation towards learning as integral part of to their M&E systems. The study recommended the involvement of M&E personnel in project design and budgeting; capacity development in relation to the use of information systems and RBM tools; and M&E policies that promote stakeholder involvement and learning culture.
Diseño de plan estratégico Instituto de Diseño y Moda María Luisa Valencia
Creators: name: Cuadrado Marmolejo, Alber Andrés
name: Suárez Valbuena, Franciny
Publisher: name: Universidad de Cartagena
Year: 2016
Subjects: subject: Planeación estrategica
subject: Planificación empresarial
subject: Administración estratégica
subject: Marketing
subject: FOS: Economics and business

description: Tesis (Administrador de Empresas).--Universidad de Cartagena. Facultad de Ciencias Económicas. Programa de Administración de Empresas, 2016
description: El objetivo de esta investigación busca formular el plan estratégico para el Instituto de Diseño y Moda María Luisa Valencia, que conlleve al mejoramiento de la competitividad. Para la Universidad la realización de este proyecto evidencia el compromiso que tiene la institución universitaria con el progreso y desarrollo de la sociedad, al formar y acercar profesionales integrales capaces de generar soluciones que hagan más viable la interrelación de los actores en las relaciones productivas y sociales razones que justifican la realización de este proyecto.
Upper semicontinuity of the lamination hull
Creators: name: Harris, Terence L. J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Analysis of PDEs (math.AP)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 49J45 (Primary) 52A30 (Secondary)

description: Let $K \subseteq \mathbb{R}^{2 \times 2}$ be a compact set, let $K^{rc}$ be its rank-one convex hull, and let $L(K)$ be its lamination convex hull. It is shown that the mapping $K \to \overline{L(K)}$ is not upper semicontinuous on the diagonal matrices in $\mathbb{R}^{2 \times 2}$, which was a problem left by Kolář. This is followed by an example of a 5-point set of $2 \times 2$ symmetric matrices with non-compact lamination hull. Finally, an example of another 5-point set $K$ is given, which has $L(K)$ connected, compact and strictly smaller than $K^{rc}$.
description: 8 pages, 2 figures. Accepted version
La investigación en la enseñanza del derecho (1992-2014) - Caso programa de derecho de la Universidad de Cartagena.
Creators: name: Alarcón Lora, Andrés Antonio
Publisher: name: Universidad de Cartagena
Year: 2017
Subjects: Derecho - Investigaciones
Investigación jurídica - Metodología

description: Tesis (Doctora en Ciencias de la Educación) -- Universidad de Cartagena. Doctorado en Ciencias de la Educación Rudecolombia, 2017
description: En este proyecto se busca como objetivo general analizar los cambios en la enseñanza del Derecho, con la inclusión del componente investigativo en los planes de estudio del programa de Derecho de la Universidad de Cartagena entre los años 1992 y 2014; y como objetivos específicos el estudio de la regulación y de los cambios normativos nacionales e institucionales para la inclusión de un componente investigativo de los planes de estudios desarrollados en el programa.