cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Two-point function of a quantum scalar field in the interior region of a Kerr black hole
Creators: name: Zilberman, Noa
name: Casals, Marc
name: Ori, Amos
name: Ottewill, Adrian C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Quantum field effects on a classical background spacetime may be obtained from the semiclassical equations of General Relativity with the expectation value of the stress-energy tensor of the quantum field as a source. This expectation value can be calculated from Hadamard's elementary two-point function, which in practice is given in terms of sums of products of field modes evaluated at two spacetime points. We derive expressions for the two-point function for a massless scalar field in the Unruh state on a Kerr black hole spacetime. Our main result in this paper is a novel expression valid when the two points lie inside the black hole; we also (re-)derive, using a new method, the known expression valid when the two points lie outside the black hole. We achieve these expressions by finding relationships between Unruh modes, defined in terms of the retarded Kruskal coordinate, and Eddington modes, defined in terms of the Eddington coordinates. While our starting expression for the two-point function is written in terms of the Unruh modes, we give our final expression in terms of the Eddington modes, which have the computational advantage that they decompose into factors that obey ordinary differential equations. In an appendix we also derive expressions for the bare mode contributions to the flux components of the stress-energy tensor for a minimally-coupled massless scalar field inside the black hole. Our results thus lay the groundwork for future calculations of quantum effects inside a Kerr black hole.
Limits on dynamically generated spin-orbit coupling: Absence of $l=1$ Pomeranchuk instabilities in metals
Creators: name: Kiselev, Egor I.
name: Scheurer, Mathias S.
name: Wölfle, Peter
name: Schmalian, Jörg
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: An ordered state in the spin sector that breaks parity without breaking time-reversal symmetry, i.e., that can be considered as dynamically generated spin-orbit coupling, was proposed to explain puzzling observations in a range of different systems. Here we derive severe restrictions for such a state that follow from a Ward identity related to spin conservation. It is shown that $l=1$ spin-Pomeranchuk instabilities are not possible in non-relativistic systems since the response of spin-current fluctuations is entirely incoherent and non-singular. This rules out relativistic spin-orbit coupling as an emergent low-energy phenomenon. We illustrate the exotic physical properties of the remaining higher angular momentum analogues of spin-orbit coupling and derive a geometric constraint for spin-orbit vectors in lattice systems.
description: 7 pages, 2 figures
Lipidated polymers for stabilization and antibacterial applications
Creators: name: JAMES LYNDEN GRACE
Publisher: name: Monash University
Year: 2019
Subjects: subject: Organic Chemistry
subject: FOS: Chemical sciences
subject: 91209 Polymers and Plastics
subject: FOS: Materials engineering

description: This thesis investigates a series of novel lipidated low molecular weight polymer materials comprised of various lipid elements and macromolecular architecture for use as antimicrobials, or as stabilizers. It was found that careful selection of the length of the lipid tail and the polymer constituents played a strong role in the activity of the polymer against mammalian and microbial cells. The charge of the polymer was also found to affect the stabilization.
Clasificación morfofonológica y análisis de la variación espacial y temporal de las playas de Cartagena: Sector Marbella
Creators: name: Avendaño Camargo, Caroline Lineth
name: Bonfante Zarza, Nelli Patricia
Publisher: name: Universidad de Cartagena
Year: 2012
Subjects: Erosion de la playas
Sedimentacion
Erosión costera - Colombia

description: Tesis(Ingeniero Civil).-Universidad de Cartagena. Facultad de Ciencias E Ingenierías.Programa de Ingeniería Civil,2012
description: El principal objetivo del presente proyecto fue la realización de la clasificación geomorfológica y el análisis de las variaciones espacio-temporales de las playas de Marbella, con el fin de continuar con el seguimiento de las mismas realizado en años anteriores. Para esto, se estudiaron 4 perfiles durante 3 meses, se compararon los resultados obtenidos con el perfil de equilibrio y se recolectaron muestras de sedimento durante cada medición para su análisis sedimentológico.
OneFlorida Certified Database 07/20/2024
Creators: name: Weinbrenner, Donald
name: Hunter, Catherine
name: Kidder, Beth
name: Robinson, Temple
name: Harris, Cynthia
name: Jones, Carrie
name: Green, Leon
name: Rogers, Brant
name: Smith, Eric
name: Mandal, Prabir
name: Reams, Renee
name: Cavicchia, Philip
name: Jordan, Melissa
name: Burness, Laura
name: Carlson, Todd
name: Chandran, Haneesh
name: McCain, Lance
name: Mitchell, Susan
name: Robinson, Patricia
name: Shrivalle, Katelynn
name: Dusan, Shauni
name: Richard, Tere
name: Smith, Steven
name: Durant, TaWanda
name: Eden, Joni
name: Joyce, Jeffrey
name: McDonnell, Grant
name: O'Neal, Donna
name: Carretta, Henry
name: Martinez, Joel
name: Moya, Keiser
name: Paul, Ludmilla
name: Quintana, Carlos
name: Frase, Alison
name: DeLeon, Veronica
name: Desrouleaux, Dorice
name: McCafferty, Jennifer
name: Moy, Pedro
name: Perez, Michael
name: Reddy, Raj
name: Sanchez, Maylee
name: Salyakina, Daria
name: Senior, Jerome
name: Taylor, Thomas
name: Nadglowski, Joseph
name: Candelario, Jorge L.
name: Mohr, Deanna
name: Petrone, Matt
name: Ramirez, Gabriela
name: Urbina, Zaida
name: Viera, Adael
name: Walker, Kathleen
name: Barfiled, Chris
name: Blair, Cynthia
name: Herman, Kristin
name: Ladle, Devin
name: Thomas, Richard
name: Watson, Dean
name: Baralt, Claire
name: Bell, Debora J
name: Bian, Jiang
name: Bottini, Tina
name: Boyd, Erica L
name: Byrne, Barry J
name: Carek, Peter J
name: Cottler, Linda B
name: Deason, Dick
name: DeHoff, Rhonda Marsha
name: Enani, Mahmoud
name: Evans, Christy M
name: Frening, Debbie
name: JR, Thomas J George,
name: Gramig, Lavina L
name: Gutter, Michael S
name: Handberg, Eileen Mary
name: Hogan, William
name: Ilavala, Neeharika
name: Janicke, David
name: Jones, Ross
name: Krieger, Janice
name: Lepanto, Rachel L
name: Lipori, Gigi
name: Loiacono, Alex
name: Magoc, Tanja
name: Galvan-Miyoshi, Yankuic
name: Manini, Lizabeth M
name: Markham, Merry Jennifer
name: Shaw, Katie
name: McMichael, Barbara C
name: Millay, Tamara Ann
name: Nelson, David R
name: Pepine, Carl J
name: Ranka, Deepa
name: Rodriguez, Lylly F
name: Schmidt, Erik
name: Shenkman, Elizabeth Ann
name: Smith, Myra
name: Vogtle, Candice
name: Weaver, Michael
name: White, Sonya
name: Xu, Howard
name: Bassols-Marin, Carrie
name: Bookman, Richard
name: Carrasquillo, Olveen
name: Dominguez, Eliana
name: Giobio, Marie
name: Jayaweera, Dushyantha
name: Dominguez, Sheela
name: Puram, Deepthi
name: Ransford, Daru
name: Taghioff, Peyman
name: Tsinoremas, Nick
name: Anderson, Matthew
name: Brownlee, William
name: Badal, Michael
name: Patel, Nishit
name: Morris, Sherry
name: Clifford, Gari
name: Deshpande, Nita
name: Kamaleswaran, Rishi
name: Obertone, Tracy
name: Patzer, Rachel
name: Robichaux, Chad
name: Teunis, Larissa
name: Wyatt, Matthew
name: Womack, Jason
name: Guzman, Alfredo
name: Burkholder, Greer
name: Willig, James
name: Mugavero, Michael
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 420310
subject: Health surveillance

description: OneFlorida certified database as of 07/20/2024. Contains data from 01/01/2012 through 01/31/2024.
Quantum fluxes at the inner horizon of a spinning black hole
Creators: name: Zilberman, Noa
name: Casals, Marc
name: Ori, Amos
name: Ottewill, Adrian C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Rotating or charged classical black holes in isolation possess a special surface in their interior, the Cauchy horizon, beyond which the evolution of spacetime (based on the equations of General Relativity) ceases to be deterministic. In this work, we study the effect of a quantum massless scalar field on the Cauchy horizon inside a rotating (Kerr) black hole that is evaporating via the emission of Hawking radiation (corresponding to the field being in the Unruh state). We calculate the flux components (in Eddington coordinates) of the renormalized stress-energy tensor of the field on the Cauchy horizon, as functions of the black hole spin and of the polar angle. We find that these flux components are generically non-vanishing. Furthermore, we find that the flux components change sign as these parameters vary. The signs of the fluxes are important, as they provide an indication of whether the Cauchy horizon expands or crushes (when backreaction is taken into account). Regardless of these signs, our results imply that the flux components generically diverge on the Cauchy horizon when expressed in coordinates which are regular there. This is the first time that irregularity of the Cauchy horizon under a semiclassical effect is conclusively shown for (four-dimensional) spinning black holes.
description: v2: Version accepted for publication in Phys. Rev. Lett. Some extensions; fixed typo in Eq. (7)
title: Comparison of fragment analysis and immunohistochemistry to conventional Sanger sequencing for the detection of R132H and non-R132H IDH1 mutations in gliomas
Creators: name: Heubeck, Eva
name: Ludwig, Nicole
name: Ebert, Elke
name: Kim, Yoo-Yin
Publisher: name: German Medical Science GMS Publishing House
Year: 2015
Subjects: subject: 610 Medical sciences; Medicine

description: Introduction: Both, primary and secondary glioblastomas are CNS tumors with a very poor prognosis. Both entities differ in their IDH1 mutational status. This mutation represents an early event in tumorigenesis of glioma and is a prognostic parameter. Objectives: To compare different detection methods[for full text, please go to the a.m. URL]
description: 60th Annual Meeting of the German Society for Neuropathology and Neuroanatomy (DGNN)
An index theorem for quarter-plane Toeplitz operators via extended symbols and gapped Invariants related to corner states
Creators: name: Hayashi, Shin
Publisher: name: arXiv
Year: 2022
Subjects: subject: K-Theory and Homology (math.KT)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 19K56 (Primary), 15A23, 47B35, 81V99 (Secondary)

description: In this paper, we discuss index theory for Toeplitz operators on a discrete quarter-plane of two-variable rational matrix function symbols. By using Gohberg-Krein theory for matrix factorizations, we extend the symbols defined originally on a two-dimensional torus to some three-dimensional sphere and derive a formula to express their Fredholm indices through extended symbols. Variants for families of (self-adjoint) Fredholm quarter-plane Toeplitz operators and those preserving real structures are also included. For some bulk-edge gapped single-particle Hamiltonians of finite hopping range on a discrete lattice with a codimension-two right angle corner, topological invariants related to corner states are provided through extensions of bulk Hamiltonians.
description: 32 pages, 4 figures
Evaluación del proceso de descentralización en el el municipio de Maria La Baja Bolívar (un estudio de caso) para el periodo 1995 - 1996
Creators: name: Barrios Lambraño, Bibiana
name: Sierra Cuentas, Gabriel
Publisher: name: Universidad De Cartagena
Year: 1996
Subjects: Descentralización
Descentralización - Maria La Baja, (Bolívar) - Estudio de caso

description: Tesis (Economista).--Universidad de Cartagena. Facultad de Ciencias Económicas. Programa de Economía, 1996.
description: El presente estudio tiene por objeto evaluar los efectos que las medidas descentralistas han tenido en el municipio de Maria la Baja, explorando los factores que han determinado el cumplimiento o no de los propósitos explícitos de la descentralizacion, enfatizando en el factor de capacidad administrativa y técnica observando los cambios acaecidos en materia fiscal, administrativos y en lo referido a la política económica en el municipio.
Emergent facilitation behavior in a distinguishable-particle lattice model of glass
Creators: name: Zhang, Ling-Han
name: Lam, Chi-Hang
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We propose an interacting lattice gas model of structural glass characterized by particle distinguishability and site-particle-dependent random nearest-neighboring particle interactions. This incorporates disorder quenched in the configuration space rather than in the physical space. The model exhibits non-trivial energetics while still admitting exact equilibrium states directly constructible at arbitrary temperature and density. The dynamics is defined by activated hopping following standard kinetic Monte Carlo approach without explicit facilitation rule. Kinetic simulations show emergent dynamic facilitation behaviors in the glassy phase in which motions of individual voids are significant only when accelerated by other voids nearby. This provides a microscopic justification for the dynamic facilitation picture of structural glass.
The Role of Transformational leadership in project success: The Case of Zemen Bank S.C Head Quarter project
Creators: name: Alemu, Natnael
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: It is identified that in the past decade, transformational leadership which has become a new paradigm of leadership has become a popular research subject. After the theory is introduced, different writers worked on it in different perspectives. Transformational leadership asserts mobilizing people to the common good through creating a safe place and making integration with ethics, morality and integrity. This paper aims to to assess the role of leadership in project success in case of china wuyi construction zemen bank head quarter project. Data are gatheredfrom the head office Managers & colleagues of china wuyi through formal interviews and questioners. A set of questionnaires was administered to 50 employess of China Wu Yi Co. Ltd. in Addis Ababa, of whom 48 were responded. Qualitative data analysis with the support of interviews and theoretical frameworks has been done. A set of questionnaires was administered to 50 project managers, executive directors and supervisors, program officers in Addis Ababa, of whom 48 were responded. Descriptive analysis was used to analyze the data that gathered through questionnaires. The data gathered through questionnaires planned to be fed into SPSS to make the data ready for processing through graphs, figures, tables and charts, i.e. a descriptive analysis was implemented. The most salient finding was that the role transformational leadership styles were related to project performance. Implication of the study was discussed, and some suggestions were made
Probing Three-Dimensional Magnetic Fields: I -- Polarized Dust Emission
Creators: name: Hu, Yue
name: Lazarian, A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Polarized dust emission is widely used to trace the plane-of-the-sky (POS) component of interstellar magnetic fields in two dimensions. Its potential to access three-dimensional magnetic fields, including the inclination angle of the magnetic fields relative to the line-of-sight (LOS), is crucial for a variety of astrophysical problems. Based on the statistical features of observed polarization fraction and POS Alfvén Mach number $\overline{M_{\rm A}}_{,\bot}$ distribution, we present a new method for estimating the inclination angle. The magnetic field fluctuations raised by anisotropic magnetohydrodynamic (MHD) turbulence are taken into account in our method. By using synthetic dust emission generated from 3D compressible MHD turbulence simulations, we show that the fluctuations are preferentially perpendicular to the mean magnetic field. We find the inclination angle is the major agent for depolarization, while fluctuations of magnetic field strength and density have an insignificant contribution. We propose and demonstrate that the mean inclination angle over a region of interest can be calculated from the polarization fraction in a strongly magnetized reference position, where $\overline{M_{\rm A}}_{,\bot}^2\ll1$. We test and show that the new method can trace the 3D magnetic fields in sub-Alfvénic, trans-Alfvénic, and moderately super-Alfvénic conditions ($0.4\lesssim M_{\rm A}\lesssim1.2$). We numerically quantify that the difference between the estimated inclination angle and actual inclination angle ranges from 0 to $20^\circ$ with a median value of $\le10^\circ$.
description: 14 pages, 11 figures, accepted for publication in MNRAS
Probing Structural Requirements of Positive Allosteric Modulators of the M4 Muscarinic Receptor
Creators: name: TRACEY HUYNH
Publisher: name: Monash University
Year: 2019
Subjects: subject: 111504 Pharmaceutical Sciences
subject: FOS: Clinical medicine
subject: 30499 Medicinal and Biomolecular Chemistry not elsewhere classified
subject: FOS: Chemical sciences

description: This thesis examines the synthesis, characterisation and pharmacological testing of a diverse range of compounds as potential positive allosteric modulators of the M4 muscarinic receptor. A number of compounds have been identified to produce promising pharmacological profiles. The M4 receptor has been implicated in cognitive disorders such as schizophrenia and Alzheimer’s disease, where pharmaceutical treatments with fewer side effects are highly sought after. The allosteric approach to targeting the M4 receptor, allows for selectivity of the M4 receptor subtype over the other muscarinic receptor subtypes and provides the potential for the treatment of symptoms associated with these debilitating cognitive disorders.
Introducing causal inference in the energy-efficient building design process
Creators: name: Chen, Xia
name: Abualdenien, Jimmy
name: Singh, Manav Mahan
name: Borrmann, André
name: Geyer, Philipp
Publisher: name: arXiv
Year: 2022
Subjects: subject: Methodology (stat.ME)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: "What-if" questions are intuitively generated and commonly asked during the design process. Engineers and architects need to inherently conduct design decisions, progressing from one phase to another. They either use empirical domain experience, simulations, or data-driven methods to acquire consequential feedback. We take an example from an interdisciplinary domain of energy-efficient building design to argue that the current methods for decision support have limitations or deficiencies in four aspects: parametric independency identification, gaps in integrating knowledge-based and data-driven approaches, less explicit model interpretation, and ambiguous decision support boundaries. In this study, we first clarify the nature of dynamic experience in individuals and constant principal knowledge in design. Subsequently, we introduce causal inference into the domain. A four-step process is proposed to discover and analyze parametric dependencies in a mathematically rigorous and computationally efficient manner by identifying the causal diagram with interventions. The causal diagram provides a nexus for integrating domain knowledge with data-driven methods, providing interpretability and testability against the domain experience within the design space. Extracting causal structures from the data is close to the nature design reasoning process. As an illustration, we applied the properties of the proposed estimators through simulations. The paper concludes with a feasibility study demonstrating the proposed framework's realization.
description: 20 pages, 10 figures
Estudio de prefactibilidad para un plan de manejo de residuos sólidos con aprovechamiento, en el Barrio de San Francisco de la ciudad de Cartagena
Creators: name: Cadavid Rodriguez, Javier Dario
name: Casasbuenas Oviedo, Alberto Avelino
Publisher: name: Universidad de Cartagena
Year: 2003
Subjects: Productos de residuos
Residuos sólidos
Basuras y aprovechamiento de basuras

description: Tesis (Ingeniero Civil).--Universidad de Cartagena. Facultad de Ciencias E Ingenierías. Programa de Ingeniería Civil, 2003.
description: El presente trabajo tiene por objeto realizar el estudio de prefactibilidad para un plan de manejo de residuos sólidos con aprovechamiento que satisfaga la necesidad del servicio de aseo en la comunidad del barrio de San Francisco de Asís de la ciudad cartagena en las áreas sin cobertura.
Semilinear wave equations of derivative type with spatial weights in one space dimension
Creators: name: Kitamura, Shunsuke
name: Morisawa, Katsuaki
name: Takamura, Hiroyuki
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: primary 35L71, secondary 35B44

description: This paper is devoted to the initial value problems for semilinear wave equations of derivative type with spatial weights in one space dimension. The lifespan estimates of classical solutions are quite different from those for nonlinearity of unknown function itself as the global-in-time existence can be established by spatial decay.
description: 16 pages. This is the accepted version to Nonlinear Analysis, RWA
The eigenvalues and eigenfunctions of the toroidal dipole operator in a mesoscopic system
Creators: name: Anghel, Dragos-Victor
name: Dolineanu, Mircea
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We give analytical expressions for the eigenvalues and generalized eigenfunctions of $\hat{T}_3$, the $z$-axis projection of the toroidal dipole operator, in a system consisting of a particle confined in a thin film bent into a torus shape. We find the quantization rules for the eigenvalues, which are essential for describing measurements of $\hat{T}_3$. The eigenfunctions are not square-integrable, so they do not belong to the Hilbert space of wave functions, but they can be interpreted in the formalism of rigged Hilbert spaces as kernels of distributions. While these kernels appear to be problematic at first glance due to singularities, they can actually be used in practical computations. In order to illustrate this, we prescribe their action explicitly and we also provide a normalization procedure.
description: 11 pages and 3 figures
A note on the Poisson bracket of 2d smeared fluxes in loop quantum gravity
Creators: name: Cattaneo, Alberto S.
name: Perez, Alejandro
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We show that the non-Abelian nature of geometric fluxes---the corner-stone in the definition of quantum geometry in the framework of loop quantum gravity (LQG)---follows directly form the continuum canonical commutations relations of gravity in connection variables and the validity of the Gauss law. The present treatment simplifies previous formulations and thus identifies more clearly the root of the discreteness of geometric operators in LQG. Our statement generalizes to arbitrary gauge theories and relies only on the validity of the Gauss law.
description: 5 pages, no figures (journal version)
Eine Interviewstudie zum Lesen von Diagrammen
Creators: name: Plicht, Christine
name: Vogel, Markus
name: Randler, Christoph
Publisher: name: Gesellschaft für Didaktik der Mathematik
Year: 2014
Subjects: subject: 510

description: Diagramme sind nicht nur in öffentlichen Medien ein gängiges Darstellungsmittel, sondern auch in den Lehrmaterialien vieler Unterrichtsfächer. Damit kommt dem sachgerechten Lesen von Diagrammen eine wichtige Rolle im Fachunterricht zu: struktur- und kontextspezifische Informationen müssen ausgelesen, eingebracht und zusammengedacht werden.
A half-normal distribution scheme for generating functions
Creators: name: Wallner, Michael
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: Discrete Mathematics (cs.DM)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 05A15, 05A16

description: We present a general theorem on the structure of bivariate generating functions which gives sufficient conditions such that the limiting probability distribution is a half-normal distribution. If $X$ is a normally distributed random variable with zero mean, then $|X|$ obeys a half-normal distribution. In the second part, we apply our result to prove three natural appearances in the domain of lattice paths: the number of returns to zero, the height, and the sign changes are under zero drift distributed according to a half-normal distribution. This extends known results to a general step set. Finally, our result also gives a new proof of Banach's matchbox problem.
description: Long version of "A half-normal distribution scheme for generating functions and the unexpected behavior of Motzkin paths" appeared in the Proceedings of 27th International Conference on Probabilistic, Combinatorial and Asymptotic Methods for the Analysis of Algorithms, Krakow, Poland, 4-8 July 2016, see arXiv:1605.03046. To appear in the European Journal of Combinatorics
Una mirada a los procesos de intervención social adelantados por egresados (as) del programa de trabajo social de la Universidad de Cartagena
Creators: name: Romero Rodriguez, Sugey Andrea
Publisher: name: Universidad de Cartagena
Year: 2020
Subjects: Estudiantes universitarios
Bienestar estudiantil
Trabajo social de grupo

description: Tesis (Trabajador Social) -- Universidad de Cartagena. Facultad de ciencias Sociales y Educación, programa de Trabajo Social, 2020
description: Este informe es producto de una investigación que lleva por nombre “Una mirada a los procesos de intervención social adelantados por egresados (as) del programa de Trabajo Social de la Universidad de Cartagena”. La investigación fue realizada desde la práctica académica en el programa de Trabajo Social, adscrito a la Facultad de Ciencias Sociales y Educación de la Universidad de Cartagena. El propósito principal de esta investigación fue comprender cómo han sido abordados los procesos de intervención social adelantados por egresados (as) del programa de Trabajo Social de la Universidad de Cartagena para responder a problemas sociales del área de incidencia de su actuación profesional La investigación se direccionó desde un enfoque cualitativo y se fundamentó a partir del paradigma Histórico-Hermenéutico de acuerdo con esto, es necesario resaltar la comprensión como un elemento imprescindible que estuvo presente durante todo el proceso investigativo. En cuanto al método que orientó la investigación se tomó el estudio cualitativo de casos, teniendo como referente los planteamientos de Robert K. Yin y Carlos Monje. A partir de los resultados obtenidos en la investigación se pudo establecer que los (as) egresados (as) consultados reconocieron la importancia de seguir generando reflexiones que posibiliten pensar la intervención social del Trabajo Social de manera fundamentada, a partir de asuntos teórico/conceptuales, metodológicos y epistemológicos que son claves para responder a problemas sociales del área de incidencia de su actuación profesional.
Studierende erklären Zusammenhänge zwischen dynamisch verbundenen Repräsentationen von Funktionen
Creators: name: Pinkernell, Guido
Publisher: name: Gesellschaft für Didaktik der Mathematik
Year: 2014
Subjects: subject: 510

description: Mit dem computerbasierten Erkunden multipler Repräsentationen von Funktionen ist die Erwartung verbunden, dass ein aspektreicher Begriff von Funktionen entsteht. Aber hat das Gelernte auch immer mathematische Substanz? Analysen von Interviews mit Studierenden zeigen, auf welche Weise sich Lernende die beobachteten Zusammenhänge erklären können. Die theoretische Basis dieser Analysen bilden fachspezifische Theorien, die das Lernen als ein Abstrahieren von Oberflächenmerkmalen beschreiben.
The Angell Plot from the Potential Energy Landscape Perspective
Creators: name: Zhang, D. M.
name: Sun, D. Y.
name: Gong, X. G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Within the scenario of the potential energy landscape (PEL), a thermodynamic model has been developed to uncover the physics behind the Angell plot. In our model, by separating the barrier distribution in PELs into a Gaussian-like and a power-law form, we obtain a general relationship between the relaxation time and the temperature. The wide range of the experimental data in the Angell plot, as well as the molecular-dynamics data, can be excellently fitted by two characteristic parameters, the effective barrier (ω) and the effective width (σ) of a Gaussian-like distribution. More importantly, the fitted ω and σ^2 for all glasses are found to have a simple linear relationship within a very narrow band, and fragile and strong glasses are well separated in the ω-σ^2 plot, which indicates that glassy states only appear in a specific region of the PEL.
Generic Risk Factors and Their Implication for Information System (IS) Projects of Ethiotelecom
Creators: name: Asmare, Melkamu
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: This study identified the risk factors in each project phases or process groups of IS projects in ethiotelecom. The researcher used descriptive research method. Risk factors were identified by interviewing project managers and project team members, project document analysis, and by reviewing other research works. Structured questionnaires with Likert type was used for severity level analysis on different project phases of IS projects. This study is significant to a larger extent to project implementers, users, and venders to identify and prioritize risk factors while the projects are initiated, Planned, launched, monitored, and closed. Moreover, it can be used as an input for further study on risk management of the company. The findings of the study indicated that the average severity of identified risk factors is found to be different on different project phases. On average, there is lower severity on scoping phase and M&C phase, where as there is higher impact on Closing, Planning, and launching project phases. Moreover, except for few risk factors which affect all the project phases similarly, every project phase is affected differently by different risk factors. Risk factors which have considerable impact on each project phase and hence the project as a whole were identified and prioritized through experts, experienced project team members, and project managers. It is therefore, worthwhile and effective to conduct continual risk identification, prioritization and treatment with in each project phase so as to avoid the underline gap in project progress or achieving the objectives of project deliverables
Revealing the interplay of nanoparticles with proteins for nanomedicine
Creators: name: MIAOYI WANG
Publisher: name: Monash University
Year: 2019
Subjects: subject: 111504 Pharmaceutical Sciences
subject: FOS: Clinical medicine
subject: 100709 Nanomedicine
subject: FOS: Nanotechnology

description: The interaction between nanoparticles and proteins dictates the ultimate biological fate of nanoparticles introduced in vivo and thus necessitates an in-depth examination for advancing nanomedicine. This thesis delineates plasma protein associations with nanoparticles functionalized with anti-fouling stealth polymers, and demonstrates the potency of a range of engineered nanoparticles in inhibiting pathogenic protein aggregation and toxicity in vitro and in vivo. Overall, the findings documented in the thesis support rational design of nanomedicine for maximal protein avoidance and effectiveness against amyloidosis in type 2 diabetes and other amyloid diseases.
Understanding, investigating and addressing polypharmacy in residential aged care facilities
Creators: name: NATALI JOKANOVIC
Publisher: name: Monash University
Year: 2019
Subjects: subject: 111503 Clinical Pharmacy and Pharmacy Practice
subject: FOS: Clinical medicine

description: Polypharmacy is common in older people, contributing to medication errors, hospitalisations and mortality. This thesis explores Australian and international data to understand, investigate and address polypharmacy in residential aged care facilities (RACFs). It identifies a high and variable prevalence of polypharmacy, medication classes that contribute to polypharmacy, and explores a potential link between polypharmacy and medication errors resulting in deaths. This thesis also examines cardiovascular medication use over time, identifying more conservative prescribing in Finnish residents with dementia and coronary heart disease. Findings from this thesis contribute to a better understanding of polypharmacy, required for the development of interventions to address increasing polypharmacy in RACFs.
Maßtheorie mit mathematisch begabten Schülerinnen und Schülern - Chancen und Grenzen
Creators: name: Platz, Melanie
name: Niehaus, Engelbert
Publisher: name: Gesellschaft für Didaktik der Mathematik
Year: 2014
Subjects: subject: 510

description: Die Wahl des Weges kann entscheidenden Einfluss auf das Risiko haben, welchem sich Personen aussetzen. Risikowahrnehmung und qualitatives räumliches Verständnis von Risiken kann mit Integralrechnung verbunden werden. Durch die Auswertung der Risikofunktion entlang eines Weges entstehen Wegintegrale, die im Themenkanon der Sek.-analysis im Kontext der Integration behandelt werden können. Empirische Forschung mit SuS mit besonderen naturwissenschaftlichen Begabungen wird durchgeführt.
Artificial diffusion for convective and acoustic low Mach number flows I: Analysis of the modified equations, and application to Roe-type schemes
Creators: name: Hope-Collins, J.
name: di Mare, L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Numerical Analysis (math.NA)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Three asymptotic limits exist for the Euler equations at low Mach number - purely convective, purely acoustic, and mixed convective-acoustic. Standard collocated density-based numerical schemes for compressible flow are known to fail at low Mach number due to the incorrect asymptotic scaling of the artificial diffusion. Previous studies of this class of schemes have shown a variety of behaviours across the different limits and proposed guidelines for the design of low-Mach schemes. However, these studies have primarily focused on specific discretisations and/or only the convective limit. In this paper, we review the low-Mach behaviour using the modified equations - the continuous Euler equations augmented with artificial diffusion terms - which are representative of a wide range of schemes in this class. By considering both convective and acoustic effects, we show that three diffusion scalings naturally arise. Single- and multiple-scale asymptotic analysis of these scalings shows that many of the important low-Mach features of this class of schemes can be reproduced in a straightforward manner in the continuous setting. As an example, we show that many existing low-Mach Roe-type finite-volume schemes match one of these three scalings. Our analysis corroborates previous analysis of these schemes, and we are able to refine previous guidelines on the design of low-Mach schemes by including both convective and acoustic effects. Discrete analysis and numerical examples demonstrate the behaviour of minimal Roe-type schemes with each of the three scalings for convective, acoustic, and mixed flows.
description: 38 pages, 8 figures. Updated version including peer review. Published in Journal of Computational Physics
Das versteh ich nicht! Eine Untersuchung zur Konstruktion des Situationsmodells
Creators: name: Plath, Jennifer
name: Leiss, Dominik
name: Schwippert, Knut
name: Neumann, Astrid
Publisher: name: Gesellschaft für Didaktik der Mathematik
Year: 2014
Subjects: subject: 510

description: Durch die vermehrte Bearbeitung von Problemstellungen mit größeren Textanteilen im Mathematikunterricht und die Notwendigkeit mentale Repräsentationen aufzubauen, ist das Textverständnis verstärkt zu einer zentralen Voraussetzung für die erfolgreiche Aufgabenbearbeitung geworden (vgl. Duarte et al. 2011). Insbesondere bei der Kompetenz des mathematischen Modellierens ist das Verstehen des Aufgabentextes grundlegend für die weitere Bearbeitung und stellt für viele Schülerinnen und Schüler eine potentielle kognitive Hürde dar.
La culpa y el delito culposo
Creators: name: Puello Amador, Lacides
Publisher: name: Universidad de Cartagena
Year: 1976
Subjects: Delitos - Colombia - Legislación
Culpa jurídica

description: Tesis (Abogado) -- Universidad de Cartagena. Facultad de Derecho y Ciencias Políticas, 1976.
description: Exigencia al ciudadano, promedio de que debe tener un cuidado cuando ejecuta una conducta peligrosa que pueda poner en peligro bienes jurídicos, siendo la culpa una infracción al deber objetivo de cuidado que, sin la intención del dolo, termina generando un resultado típico, siendo este sancionado por la ley penal.
A combinatorial view of stochastic processes: White noise
Creators: name: Diaz-Ruelas, Alvaro
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Combinatorics (math.CO)
subject: Methodology (stat.ME)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: White noise is a fundamental and fairly well understood stochastic process that conforms the conceptual basis for many other processes, as well as for the modeling of time series. Here we push a fresh perspective toward white noise that, grounded on combinatorial considerations, contributes to give new interesting insights both for modelling and theoretical purposes. To this aim, we incorporate the ordinal pattern analysis approach which allows us to abstract a time series as a sequence of patterns and their associated permutations, and introduce a simple functional over permutations that partitions them into classes encoding their level of asymmetry. We compute the exact probability mass function (p.m.f.) of this functional over the symmetric group of degree $n$, thus providing the description for the case of an infinite white noise realization. This p.m.f. can be conveniently approximated by a continuous probability density from an exponential family, the Gaussian, hence providing natural sufficient statistics that render a convenient and simple statistical analysis through ordinal patterns. Such analysis is exemplified on experimental data for the spatial increments from tracks of gold nanoparticles in 3D diffusion.
Investigating Structural Aspects and Opportunities in Solid Dispersing Lipid- Based Drug Formulations
Creators: name: KAPILKUMAR ARVINDBHAI VITHANI
Publisher: name: Monash University
Year: 2019
Subjects: subject: 111504 Pharmaceutical Sciences
subject: FOS: Clinical medicine
subject: 30199 Analytical Chemistry not elsewhere classified
subject: FOS: Chemical sciences

description: Lipid-based formulations have been researched for many years as a viable means to improve the oral bioavailability of poorly water-soluble lipophilic compounds. Among other developed lipid-based formulations, self-microemulsifying drug delivery system (SMEDDS) received an increased interest due to improved formulation and dispersion behaviours. Thus, the first part of the thesis investigates the evolution of colloidal phases during dispersion and digestion, and examine the solubilisation behaviour of lipophilic drugs during digestion. And, the second part of the research focuses on implementation of 3D printing technology for the preparation of solid-phase carrier-free solid SMEDDS formulations.
Optimal Hashing-based Time-Space Trade-offs for Approximate Near Neighbors
Creators: name: Andoni, Alexandr
name: Laarhoven, Thijs
name: Razenshteyn, Ilya
name: Waingarten, Erik
Publisher: name: arXiv
Year: 2016
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Computational Complexity (cs.CC)
subject: Computational Geometry (cs.CG)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: [See the paper for the full abstract.] We show tight upper and lower bounds for time-space trade-offs for the $c$-Approximate Near Neighbor Search problem. For the $d$-dimensional Euclidean space and $n$-point datasets, we develop a data structure with space $n^{1 + ρ_u + o(1)} + O(dn)$ and query time $n^{ρ_q + o(1)} + d n^{o(1)}$ for every $ρ_u, ρ_q \geq 0$ such that: \begin{equation} c^2 \sqrt{ρ_q} + (c^2 - 1) \sqrt{ρ_u} = \sqrt{2c^2 - 1}. \end{equation} This is the first data structure that achieves sublinear query time and near-linear space for every approximation factor $c > 1$, improving upon [Kapralov, PODS 2015]. The data structure is a culmination of a long line of work on the problem for all space regimes; it builds on Spherical Locality-Sensitive Filtering [Becker, Ducas, Gama, Laarhoven, SODA 2016] and data-dependent hashing [Andoni, Indyk, Nguyen, Razenshteyn, SODA 2014] [Andoni, Razenshteyn, STOC 2015]. Our matching lower bounds are of two types: conditional and unconditional. First, we prove tightness of the whole above trade-off in a restricted model of computation, which captures all known hashing-based approaches. We then show unconditional cell-probe lower bounds for one and two probes that match the above trade-off for $ρ_q = 0$, improving upon the best known lower bounds from [Panigrahy, Talwar, Wieder, FOCS 2010]. In particular, this is the first space lower bound (for any static data structure) for two probes which is not polynomially smaller than the one-probe bound. To show the result for two probes, we establish and exploit a connection to locally-decodable codes.
description: 62 pages, 5 figures; a merger of arXiv:1511.07527 [cs.DS] and arXiv:1605.02701 [cs.DS], which subsumes both of the preprints. New version contains more elaborated proofs and fixed some typos
Synthesis of Bioactive Purine-Like Fused Azoles
Creators: name: FELICIA PHEI LIN LIM
Publisher: name: Monash University
Year: 2019
Subjects: subject: Organic Chemistry
subject: FOS: Chemical sciences

description: This thesis describes the development of practical and highly efficient methods for the preparation of new heterocyclic compounds. The most important practical advantages of the proposed approach include excellent selectivity and good scope of the multicomponent reactions, scalable and reproducible methodology, sustainable process, and diversity of drug-like products covering a valuable part of chemical space. The results of biological testing of the prepared compounds open perspectives for the design and development of new therapeutic agents for the treatment of neglected and tropical diseases, such as Chagas disease.
Atención integral a la población hipertensa de la ESE San Nicolás de Tolentino y su grupo familiar residente en el ara rural municipio de pinillos Bolívar
Creators: name: Alvarino, Olga Mileth
Publisher: name: Universidad de Cartagena
Year: 2003
Subjects: Trabajo social familiar
Familia - Servicio social

description: Tesis (Trabajadora Social) -- Universidad de Cartagena. Facultad de Ciencias Sociales y Educación. Programa de Trabajo Social, 2003
description: Diagnóstico realizado en el primer semestre del 2003, donde se recuperan las evidencias de las problemáticas que indujeron a plantear la propuesta de acción que se muestra, y que contiene aspectos que se han constituido en elementos valiosos para el desarrollo profesional, personal y organizacional como aporte de del estudiante.
Soliton-pair dynamical transition in mode-locked lasers
Creators: name: Sulimany, Kfir
name: Tziperman, Offek
name: Bromberg, Yaron
name: Gat, Omri
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: Multi-soliton mode-locked laser waveforms are much sought as a complex light source for research and applications, but are difficult to manipulate effectively because of the elaborate and diverse interactions present. Here we present an experimental, numerical, and theoretical study of the interaction and control of the internal dynamics of a two-soliton waveform in a mode-locked fiber laser. Using the pumping current as a control agent, we demonstrate experimentally a two-orders-of-magnitude reduction in the separation of a bound soliton pair, inducing a dynamical transition between a loosely bound, phase-incoherent pair, and a tightly bound phase-locked pair. We show on the basis of a Haus-model numerical simulation of the recently-proposed noise-mediated interaction theory, that the pulse separation and dynamical transition are governed by the shape of the dispersive-wave pedestals. We explain the dynamical transition by showing analytically, within a simplified theory, that the noise-mediated interaction becomes purely attractive when the pedestals energy drops below a threshold. This work demonstrates the ability to control the waveform through the interaction forces, without external intervention in the light propagation in the laser.
Discovering dynamical features of Hodgkin-Huxley-type model of physiological neuron using artificial neural network
Creators: name: Kuptsov, Pavel V.
name: Stankevich, Nataliya V.
name: Bagautdinova, Elmira R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Machine Learning (cs.LG)
subject: Neural and Evolutionary Computing (cs.NE)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: We consider Hodgkin-Huxley-type model that is a stiff ODE system with two fast and one slow variables. For the parameter ranges under consideration the original version of the model has unstable fixed point and the oscillating attractor that demonstrates bifurcation from bursting to spiking dynamics. Also a modified version is considered where the bistability occurs such that an area in the parameter space appears where the fixed point becomes stable and coexists with the bursting attractor. For these two systems we create artificial neural networks that are able to reproduce their dynamics. The created networks operate as recurrent maps and are trained on trajectory cuts sampled at random parameter values within a certain range. Although the networks are trained only on oscillatory trajectory cuts, it also discover the fixed point of the considered systems. The position and even the eigenvalues coincide very well with the fixed point of the initial ODEs. For the bistable model it means that the network being trained only on one brunch of the solutions recovers another brunch without seeing it during the training. These results, as we see it, are able to trigger the development of new approaches to complex dynamics reconstruction and discovering. From the practical point of view reproducing dynamics with the neural network can be considered as a sort of alternative method of numerical modeling intended for use with contemporary parallel hard- and software.
description: 17 pages, 12 figures, 2 tables