cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Heterogeneous Cellular Networks with Spatio-Temporal Traffic: Delay Analysis and Scheduling
Creators: name: Zhong, Yi
name: Quek, Tony Q. S.
name: Ge, Xiaohu
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Emergence of new types of services has led to various traffic and diverse delay requirements in fifth generation (5G) wireless networks. Meeting diverse delay requirements is one of the most critical goals for the design of 5G wireless networks. Though the delay of point-to-point communications has been well investigated, the delay of multi-point to multi-point communications has not been thoroughly studied since it is a complicated function of all links in the network. In this work, we propose a novel tractable approach to analyze the delay in the heterogenous cellular networks with spatio-temporal random arrival of traffic. Specifically, we propose the notion of \emph{delay outage} and evaluated the effect of different scheduling policies on the delay performance. Our numerical analysis reveals that offloading policy based on cell range expansion greatly reduces the macrocell traffic while bringing a small amount of growth for the picocell traffic. Our results also show that the delay performance of round-robin scheduling outperforms first in first out scheduling for heavy traffic, and it is reversed for light traffic. In summary, this analytical framework provides an understanding and a rule-of-thumb for the practical deployment of 5G systems where delay requirement is increasingly becoming a key concern.
description: accepted to appear in IEEE Journal on Selected Areas in Communications
Análisis de la reserva cognitiva en pacientes con deterioro cognitivo leve amnésico y no amnésico en el Instituto Colombiana de Neuropedagogía en la ciudad de Barranquilla
Creators: name: Quirós Juliao, Frenando Antonio
Publisher: name: Universidad de Cartagena
Year: 2016
Subjects: Trastornos de la memoria
Cerebro - Enfermedades
Amnesia - Investigaciones

description: Tesis (Especialista en Psiquiatría). -- Universidad de Cartagena. Facultad de Medicina. Departamento Médico, 2016
description: El objetivo de esta investigación busca analizar la medición de la reserva cognitiva en pacientes con deterioro cognitivo leve amnésico y no amnésico en el Instituto Colombiano de Neuropedagogía en la ciudad de Barranquilla mediante la aplicación del Cuestionario del Índice de Reserva Cognitiva.
Causes Of Project Implementation Delay: The Case Of Development Bank Of Ethiopia Financed Projects
Creators: name: Shiferaw, Ifa
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: The Development Bank of Ethiopia is a specialized financial institution established to promote the national development agenda through development finance and close technical support to viable projects from the priority areas of the government by mobilizing fund from domestic and foreign sources while ensuring its sustainability. While financing development projects, however, the bank faces different, in their nature and causes, kinds of problems. One of these problems is delay in project implementation resulting cost overrun, repeated additional loan and loan repayment rescheduling request. The purpose of the study was to assess the causes for project implementation delay. This study investigates the causes of delay in project implementation for DBE financed projects to determine the most important according to the key project participants; internal (bank and project owners) and external factors. The research identifies and analyses whether the major causes of project implementation delay are attributed to project owner related factor or the Banks related factor or whether delay is attributed to some external factors such as government, supplier and contactor related factors like poor customs clearing, infrastructure problems, delays in the procurement machineries and materials required for the projects., rework due to design errors etc. The target populations (projects) for the study were selected from DBE Head Office financed projects and 68 projects were selected as sample for the study purpose. For this study 136 respondents from DBE and different Projects were selected. The study used both primary and secondary data collection methods. The primary data was collected using questionnaires and interviews. Secondary data was derived from the project's files, recorded documents by bank and different documents such as annual reports, journals, articles, various books, websites, other published and unpublished sources and relevant documents. The data from the completed questionnaires was studied, re-coded and entered into the computer using the Statistical Package for Social Sciences (SPSS) version 24. Descriptive statistics were employed to analyze quantitative data. The descriptive statistics included standard deviation, means and percentages. The quantitative collected data was analyzed by establishing the regression tools of the various factors identified as causes for project implementation delay. The results of the study showed that project implementation is negatively affected by owners, bank and external related causes. As a result if project implementation delay is occurred and continued, the bank will not be able to collect its loan on time which ultimately may lead to loss in the operation of the bank
Nonequilibrium Quantum Critical Steady State: Transport Through a Dissipative Resonant Level
Creators: name: Zhang, G.
name: Chung, C. -H.
name: Ke, C. T.
name: Lin, C. -Y.
name: Mebrahtu, H.
name: Smirnov, A. I.
name: Finkelstein, G.
name: Baranger, H. U.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Nonequilibrium properties of correlated quantum matter are being intensively investigated because of the rich interplay between external driving and the many-body correlations. Of particular interest is the nonequilibrium behavior near a quantum critical point (QCP), where the system is delicately balanced between different ground states. We present both an analytical calculation of the nonequilibrium steady-state current in a critical system and experimental results to which the theory is compared. The system is a quantum dot coupled to resistive leads: a spinless resonant level interacting with an ohmic dissipative environment. A two channel Kondo-like QCP occurs when the level is on resonance and symmetrically coupled to the leads, conditions achieved by fine-tuning using electrostatic gates. We calculate and measure the nonlinear current as a function of bias ($I$-$V$ curve) at the critical values of the gate voltages corresponding to the QCP. The quantitative agreement between the experimental data and the theory, with no fitting parameter, is excellent. As our system is fully accessible to both theory and experiment, it provides an ideal setting for addressing nonequilibrium phenomena in correlated quantum matter.
description: version accepted by Phys. Rev. Research; arguments extended and clarified; 12 pages + references + 1 page supplemental
Konzeptuelles Verständnis und schematisierbare Fertigkeiten von Drittklässlern mit (nicht-)deutscher Familiensprache
Creators: name: Bochnik, Katrin
name: Ufer, Stefan
Publisher: name: Gesellschaft für Didaktik der Mathematik
Year: 2014
Subjects: subject: 510

description: Nationale und internationale Studien zeigten wiederholt, dass Kinder mit Migrationshintergrund im Vergleich zu Lernenden ohne Migrationshintergrund geringere Leistungen in Mathematik erreichen (z.B. Niklas, Segerer, Schmiedeler & Schneider, 2012; Tarelli, Schwippert & Stubbe, 2012). Migrationsbedingte Leistungsunterschiedewerden einerseits durch Unterschiede im sozioökonomischen Status erklärt, andererseits geht Migration häufig mit einer vom Deutschen abweichenden Familiensprache einher.
Caching Policy Toward Maximal Success Probability and Area Spectral Efficiency of Cache-enabled HetNets
Creators: name: Liu, Dong
name: Yang, Chenyang
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper, we investigate the optimal caching policy respectively maximizing the success probability and area spectral efficiency (ASE) in a cache-enabled heterogeneous network (HetNet) where a tier of multi-antenna macro base stations (MBSs) is overlaid with a tier of helpers with caches. Under the probabilistic caching framework, we resort to stochastic geometry theory to derive the success probability and ASE. After finding the optimal caching policies, we analyze the impact of critical system parameters and compare the ASE with traditional HetNet where the MBS tier is overlaid by a tier of pico BSs (PBSs) with limited-capacity backhaul. Analytical and numerical results show that the optimal caching probability is less skewed among helpers to maximize the success probability when the ratios of MBS-to-helper density, MBS-to-helper transmit power, user-to-helper density, or the rate requirement are small, but is more skewed to maximize the ASE in general. Compared with traditional HetNet, the helper density is much lower than the PBS density to achieve the same target ASE. The helper density can be reduced by increasing cache size. With given total cache size within an area, there exists an optimal helper node density that maximizes the ASE.
description: Published in IEEE Transactions on Communications
El E-book como herramienta didáctica para el fortalecimiento de la competencia lectora a nivel literal en los estudiantes del grado Primero de la Escuela Normal Superior de Ibagué, sede centro Piloto
Creators: name: Cangrejo Meneses, Alba Lucía
name: Rada Pastrana, Ana Rosa
name: Vidal Arrieta, Miguel Ángel
Publisher: name: Universidad de Cartagena
Year: 2022
Subjects: subject: Educación primaria
subject: Lectura - Enseñanza con ayuda de computadores
subject: Tecnología de la información - Educación
subject: Tecnología educativa

description: La presente investigación se enfocó a fortalecer la competencia lectora a nivel literal en los estudiantes del grado primero de la Escuela Normal Superior Ibagué - ENSI, sede Centro Piloto, para ello se recurrió a la implementación de un E-book como herramienta didáctica, con el fin de favorecer esta competencia a través de diferentes actividades que dinamizaron los procesos de enseñanza y aprendizaje buscando que su desempeño académico y el desenvolvimiento en su contexto fuera acorde a las metas institucionales. Este documento se estructuró en cinco capítulos: El primero se basó en el planteamiento del problema identificado en la institución, el cual se relacionó con el nivel literal de lectura que deben tener los estudiantes de grado primero en el momento en que se le realice una lectura y estén en capacidad de dar la información explícita del texto leído; el segundo capítulo tuvo en cuenta los referentes teóricos que sustentaron la situación abordada, entre lo que se destaca: la lectura literal, el papel de las TIC en el proceso de la lectura y los recursos educativos digitales; el tercer capítulo hizo referencia al aporte metodológico de la Investigación Acción Pedagógica- IAP en el acceso, procesamiento y análisis de la información; el cuarto capítulo presentó la intervención pedagógica a través del diseño de una estrategia didáctica basada en un E-book, que permitió fortalecer la competencia lectora a nivel literal en los estudiantes, haciendo una revisión y análisis de la información obtenida durante su aplicación; el quinto y último capítulo permitió hacer un análisis final, conclusiones y recomendaciones en relación con los objetivos planteados.
description: Introducción 7 Capítulo I: Problema de Investigación 9 Planeamiento y Formulación del Problema 9 Antecedentes 12 Internacionales 13 Nacionales 15 Justificación 18 Objetivos de la Investigación 21 Supuestos y Constructos 21 Capítulo II: Marco Referencial 25 Marco Contextual 25 Capítulo III: Metodología de la Investigación 46 Capítulo IV. Intervención Pedagógica, o Diseño Innovación TIC 64 Descripción de la Intervención 64 Narración del Desarrollo de Objetivos 66 Capítulo V: Análisis, Conclusiones y Recomendaciones 91 Conclusión 100 Bibliografía 101 Anexos 111
Dark energy equation of state parameter and its variation at low redshifts
Creators: name: Tripathi, Ashutosh
name: Sangwan, Archana
name: Jassal, H. K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In this paper, we constrain dark energy models using a compendium of observations at low redshifts. We consider the dark energy as a barotropic fluid, with the equation of state a constant as well the case where dark energy equation of state is a function of time. The observations considered here are Supernova Type Ia data, Baryonic Acoustic Oscillation data and Hubble parameter measurements. We compare constraints obtained from these data and also do a combined analysis. The combined observational constraints put strong limits on variation of dark energy energy density with redshift. For varying dark energy models, the range of parameters preferred by the supernova type Ia data is in tension with the other low redshift distance measurements.
description: 15 pages, More detailed discussion
Fragen der multimedialen Unterstützung beim Beurteilen des Verhaltens einfacher dynamischer Systeme
Creators: name: Ollesch, Julia
name: Schwarz, Marcus
name: Sedlmeier, Peter
name: Vogel, Markus
Publisher: name: Gesellschaft für Didaktik der Mathematik
Year: 2014
Subjects: subject: 510

description: Die Fähigkeit Zusammenhänge und Wirkung en innerhalb eines Systems zu durchschauen und mögliche Entwicklungen oder Reaktionen qualitativ abzuschätzen sind wichtige Bestandteile des Verständnisses von dynamischen Systemen. Aufgrund psychologisch gesicherter Befunde sollte die repräsentationale Aufbereitung einen wesentlichen Einfluss hierauf nehmen. Dies war der Anlass für diesbezügliche Studien an der TU Chemnitz sowie deren Replikation an der Universität Heidelberg.
Causales de excarcelación en la legislación penal colombiana
Creators: name: Paternina Negrete, Yolanda Del Carmen
Publisher: name: Universidad de Cartagena
Year: 1976
Subjects: Legislación - Colombia
Legislación penal - Colombia

description: Tesis (Abogado) -- Universidad de Cartagena. Facultad de Derecho y Ciencias Políticas, 1976.
description: Rehabilitación del individuo dándoles oportunidades para reivindicarse ante la sociedad por la cual es también miembro integrante, realizando esto el estado, no solo se está favoreciendo al delincuente mismo, sino que se busca conservar la integridad familiar, evitando así la posible formación de nuevos delincuentes.
title: Exploring the initiation and revision of Advance Care Planning with and for people with dementia in Scotland: a multimethod qualitative study
titleType: Other
Creators: name: Phenwan, Tharin
Publisher: name: University of Dundee
Year: 2023

description: Dementia is a neurodegenerative condition that progressively affects a person’s memories and capacity to express their future needs. This can lead to an increasing burden of care, decreasing quality of life and dignity of care of people with dementia (PwD) due to the mismatch of the care they receive and the care they expect. One mechanism to mitigate these for PwD is through the process of Advance Care Planning (ACP) which is challenging to initiate and to revise given their fluctuating mental capacity and symptom of forgetfulness. A narrative review was conducted and identified the lack of: i) PwD’s input regarding their ACP, ii) input from PwD living in the community setting and iii) clear timing for the initiation and revision of ACPs. This doctoral study aimed to improve understanding of the initiation and revision of ACP with and for PwD by ensuring that their future plans can be put into practice at the appropriate time with the appropriate people.

A multimethod qualitative study was conducted: i) online and telephone narrative interviews were conducted with 13 PwD, 23 family carers and 4 dyads of PwD and family carers and analysed using a narrative approach and ii) two Scottish dementia policy documents were analysed using Fairclough’s Critical Discourse Analysis.

Findings reveal that PwD relationally co-created their ACP with key persons who had an established, trusting relationship with them. They initiated or revised their ACP prior to the diagnosis and throughout the disease trajectory, emphasising the iterative nature of the ACP. Findings from the ACP policy analysis suggested insufficient support for HCPs for the ACP process, indicating areas of further development.

This thesis generates new knowledge in the field by synthesising understandings of PwD and their family carers regarding the initiation and revision of ACP and how the ACP process is influenced by policymaking.
Incidencia de la privatización de las empresas de servicios públicos domiciliarios en los estratos socioeconomicos 1,2 y 3 en la ciudad de Cartagena
Creators: name: Amador Gil, Mara L
name: Ariza García, Jenny E
Publisher: name: Universidad de Cartagena
Year: 2001
Subjects: Reorganización de empresas
Organización administrativa

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 las incidencias de la privatización de las empresas de los servicios públicos domiciliarios (energía eléctrica y agua potable) de la ciudad de Cartagena en los estratos socioeconomicos 1, 2, y 3.
An Assessment On The Risk Management Practice Of Construction Projects; Case Study Of Addis Ababa Saving Houses Development Enterprise
Creators: name: Erstu, Lidya
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: Managing risk is an essential process for project success. Risks are unseen events that could have a positive or a negative impact on the project success. Managing risks and preparing risk management plan will help the project to identify and estimate the level of the impact of the risk and help for prior preparation to risk impacts. The purpose of this study is to assess the risk management practice of the construction projects in the specific case of Addis Ababa Saving Houses Development enterprise. The enterprise is managed by the Ethiopian government and the study specifically focused on 40/60 housing project. The enterprises risk management practice was measured by three variables; risk management method, lifecycle risk management and risk culture. questionnaire was developed based on the three variables mentioned. The data obtained from the questionnaire was analyzed quantitatively using SPSS software. The data collected from interview and open ended questions were analyzed qualitatively. The quantitative data were presented using tables and the qualitative data was used to support and elaborate the quantitative data. From the quantitative and qualitative data it was found that the enterprise doesn't use scientific and proper risk management. Risks arise at each stage of project and these risks are managed throughout the project lifecycle. The risk culture of the enterprise is recently developing. Trainings and experience sharing were made to increase employee awareness of risk management. Top level managers still have not realized the importance of established risk management system. The absence of risk management system is creating negative financial, schedule and quality impacts. To overcome the condition mentioned above, the researcher suggested, ownership and accountability of risks to be created to minimize risk occurrence. Separate risk management department should be created and once created proper division and assignment of responsibility should be made regarding risk management. enterprise need to be more flexible and it should have a fixed communication centre for risks. Furthermore, frequent trainings need to be made to deepen the concept of risk management and its importance into employees mind to enable them to manage risks on their everyday work. At enterprise level risk aspects should be incorporated in the principles and strategies
Identificación y evaluación de proyectos de acueducto en el Departamento de Sucre
Creators: name: Perna Contreras, Wilson
name: Guevara Lamadrid, William
Publisher: name: Universidad de Cartagena
Year: 1988
Subjects: Administración de proyectos

description: Tesis (Economista) -- Universidad de Cartagena. Facultad de Ciencias Económicas. Programa de Economía. 1988.
description: El presente estudio tiene por objeto dotar a los municipios del departamento de sucre de los servicios básicos de acueducto indispensable para el desarrollo de los diferentes municipios, reflejando en ello el programa del gobierno nacional; enmarcado en la política de descentralizacion y erradicación de la pobreza absoluta a través de la identificación y evaluación de proyectos de acueducto en el departamento de sucre, para solucionar prioritaria mente la eficiencia en la prestación de los servicios públicos, especialmente los que inciden directamente en salud de la población.
Simpler PAC-Bayesian Bounds for Hostile Data
Creators: name: Alquier, Pierre
name: Guedj, Benjamin
Publisher: name: arXiv
Year: 2016
Subjects: subject: Machine Learning (stat.ML)
subject: Statistics Theory (math.ST)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: PAC-Bayesian learning bounds are of the utmost interest to the learning community. Their role is to connect the generalization ability of an aggregation distribution $ρ$ to its empirical risk and to its Kullback-Leibler divergence with respect to some prior distribution $π$. Unfortunately, most of the available bounds typically rely on heavy assumptions such as boundedness and independence of the observations. This paper aims at relaxing these constraints and provides PAC-Bayesian learning bounds that hold for dependent, heavy-tailed observations (hereafter referred to as \emph{hostile data}). In these bounds the Kullack-Leibler divergence is replaced with a general version of Csiszár's $f$-divergence. We prove a general PAC-Bayesian bound, and show how to use it in various hostile settings.
description: 18 pages
Roger Scruton y el problema de la representación en la fotografía
Creators: name: Giraldo Calle, Jorge Armando
Publisher: name: Universidad de Cartagena
Year: 2020
Subjects: Fotografía artística
Arte y fotografía
Fotorrealismo

description: Tesis (Filósofo) -- Universidad de Cartagena. Facultad de Ciencias Humanas. Programa de Filosofía, 2020
description: A la luz de los argumentos de Benjamin y Scruton cabe concluir que la fotografía es de forma intrínseca una obra creada para la reproducción masiva por lo tanto carece de aura por definición. Asimismo no es representación debido a la relación de causalidad que se establece con el asunto, esto es, el evento u objeto fotografiado ya existe antes de que sea tomada la foto. No obstante, cabe preguntarse ¿no es posible que ese “aura” perdida durante la reproducción mecánica de la fotografía, regrese en algún otro momento durante el proceso de circulación de la foto? A grandes rasgos se pueden distinguir al menos dos momentos diferentes: uno de producción de la fotografía (cuando se toma) y otro de recepción (cuando es vista por el observador). En el texto se ha planteado que para la adecuada significación entran en juego una serie de disposiciones intelectuales y anímicas del observador. La fotografía debe activar dichas disposiciones para entregar su mensaje de forma cabal, y para eso entra en juego la intención del fotógrafo. ¿No puede tomarse ese acto de significación como un equivalente al acto de creación, y de esa forma, asistir a la resurrección del aura en la fotografía?
title: Many-Body Diagrammatic Expansion in a Kohn-Sham Basis
title: Implications for Time-Dependent Density Functional Theory of Excited States
titleType: AlternativeTitle
Creators: name: Pankratov, O.
name: Tokatly, I. V.
Publisher: name: The American Physical Society
Year: 2001
Subjects: subject: 530

description: Physical Review Letters
Zero Modes and Entanglement Entropy
Creators: name: Yazdi, Yasaman K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Ultraviolet divergences are widely discussed in studies of entanglement entropy. Also present, but much less understood, are infrared divergences due to zero modes in the field theory. In this note, we discuss the importance of carefully handling zero modes in entanglement entropy. We give an explicit example for a chain of harmonic oscillators in 1D, where a mass regulator is necessary to avoid an infrared divergence due to a zero mode. We also comment on a surprising contribution of the zero mode to the UV-scaling of the entanglement entropy.
description: v2: 12 pages, 8 figures. Minor changes and typos fixed. Figure and details added on the UV behavior of the giant eigenvalue in the limit of large system size. Discussion added of relation to other work
Challenges of Implementing Agent Banking: Evidence from Agents of Commercial Bank of Ethiopia
Creators: name: Kurabachew, Betelhem
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: The purpose of the study was to investigate the challenges facing financial services agents in Addis Ababa. A structured closed and open-ended questionnaire administered face to face was the main instrument for data collection. The questionnaire was pre-tested through pilot study to ascertain the reliability of instrument in collecting required information for the study. The data was analyzed using descriptive and inferential statistics. On operational challenges, the researcher found that lack of float was a very important challenge Training was however not an important challenge. Most of the agents reported to having received training from the bank. In cases where agents operated multiple agency services52.6% of the single financial service operator agents are willing to expand their business to include services from other banks while 47.4% of the agents are satisfied with operating agent services from the commercial bank of Ethiopia. Insecurity was found to be a very important challenge a relatively low percentage (28.9%) of them had fears of insecurity.Findings on the technological challenges revealed that 89.5% of the agents experienced system down times with 52.6% of them agreeing that network unavailability was a major hindrance to service delivery. The system down times were however not attributed to the gadgets used for agency banking.The findings indicated that (30 and 10%) of the agents agreed and strongly agree that the gadgets used for agency banking were reliable. From the findings, the study concluded although lack of training was not a challenge, the agents that received training for multiple financial institutions had difficulties keeping up with the trainings from different financial institutions. As a remedy to these challenges the study recommends that Commercial Bank of Ethiopia should consider revising current policies to allow a standard agency system platform. The study also recommends setting up redundant network infrastructures to improve network accessibility and reliability. Finally the study recommended taking measures to reduce operational challenge predictors (liquidity, insecurity and agency regulation) as well as reduce network hitches as this would help financial agency operators increase their monthly transactions thus improving performance and as a result contribute to the success of agent banking in Commercial Bank of Ethiopia making the goal of financial inclusion as envisioned in CBE Vision 2025 that agency banking is supposed to address achievable.
LIGHT INDUCED EFFECTS IN OXIDE SEMICONDUCTORS
Creators: name: Ahmed, Syeed Ehsan
Publisher: name: Washington State University
Year: 2022
Subjects: Laser Processing
Persistent Photoconductivity (PPC)
Phase Transformation
Titanium Dioxide (TiO2)
Transparent Electronics
Transparent Oxide Semiconductors

description: Titanium dioxide (TiO2) has many promising applications, including photocatalysis, hydrogen production, and solar cells. In this study, anatase TiO2 was annealed in a vacuum at 800 ℃, resulting in a conductive thin film. Exposure to subgap laser light caused a seven order-of-magnitude increase in resistance. Laser-irradiated regions showed an increase in optical transmission, consistent with a reduction in oxygen vacancy concentration. Results indicate that laser irradiation did not change the morphology, composition, or phase of the material.Defining the crystal phase of oxide semiconductors using subgap laser could benefit transparent electronics. This work reports laser-induced localized phase transitions of TiO2 thin films. A Raman map of the anatase Eg mode (144 cm−1) and rutile Ag mode (608 cm−1) revealed the formation of crystalline microstructures due to the laser treatment. Laser irradiation under vacuum results in an anatase-to-rutile phase transition. Irradiating the rutile region in air changes the crystal structure back to anatase, despite the thermodynamic stability of rutile. The results suggest that irradiated photons are absorbed by defects, resulting in localized electronic excitation that leads to a mixture of amorphous and crystalline regions. The phase of the crystalline regions depends strongly on the ambient conditions.
description: Carbon is one of the most recurring contaminants known to alter the properties of a material. The form of carbon in the sputtered TiO2 thin films appeared undetectable to Raman spectroscopy. Annealing the films under vacuum results in Raman peaks at 1350 (D) and 1585 cm-1 (G), representing disorder and graphitic C=C bonds. Secondary ion mass spectrometry results revealed a substantial amount of carbon in the sputtered films that persist after annealing. Irradiating the annealed sample with a subgap laser in air dissipates carbon locally.
description: Barium calcium titanate (Ba1-xCaxTiO3) annealed under a flowing humid 2% hydrogen gas mixture exhibits room temperature persistent photoconductivity (PPC) with a subtle increase in conductivity when exposed to visible light. Hydrogen in the annealing atmosphere induces PPC, implying that the process is analogous to PPC in BaTiO3. Annealing the samples in air erased the PPC effect, indicating that the process is reversible.
Curvaton as dark matter with secondary inflation
Creators: name: Gong, Jinn-Ouk
name: Kitajima, Naoya
name: Terada, Takahiro
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We consider a novel cosmological scenario in which a curvaton is long-lived and plays the role of cold dark matter (CDM) in the presence of a short, secondary inflation. Non-trivial evolution of the large scale cosmological perturbation in the curvaton scenario can affect the duration of the short term inflation, resulting in the inhomogeneous end of inflation. Non-linear parameters of the curvature perturbation are predicted to be fNL ~ 5/4 and gNL ~ 0. The curvaton abundance can be well diluted by the short-term inflation and accordingly, it does not have to decay into the Standard Model particles. Then the curvaton can account for the present CDM with the isocurvature perturbation being sufficiently suppressed because both the adiabatic and CDM isocurvature perturbations have the same origin. As an explicit example, we consider the thermal inflation scenario and a string axion as a candidate for this curvaton-dark matter. We further discuss possibilities to identify the curvaton-dark matter with the QCD axion.
description: 16 pages, 3 figures; published version, minor revisions
La reforma educativa de 1870 en Cartagena: El interés por popularizar la instrucción popular
Creators: name: Mejía Osorio, Mónica
Publisher: name: Universidad de Cartagena
Year: 2005
Subjects: Reforma educativa - Historia

description: Tesis (Historiador) -- Universidad de Cartagena. Facultad de Ciencias Humanas. Programa de Historia, 2005
description: El primero se refiere a los antecedentes y a la implementación de la reforma educativa de 1870 a nivel nacional y sus implicaciones en el Estado Soberano de Bolívar. El segundo capítulo estudia la creación de las escuelas en Cartagena, tanto para el género masculino como para el género femenino. En el tercer capítulo el centro de interés está en las instituciones creadas para la formación de maestros, es decir, la escuela normal y la normal de institutora. El ultimo capitulo reseña los factores que condujeron a que se frustraran muchos de los objetivos de la reforma.
Efecto del entorno en la velocidad para carreteras de dos carriles: Fase III.
Creators: name: Pajaro A., Rafael
name: Ramirez P., Alberto
Publisher: name: Universidad de Cartagena
Year: 1998
Subjects: Carreteras rurales
Ingeniería agrícola

description: Tesis (Ingeniero Civil) -- Universidad de Cartagena. Facultad de Ciencias E Ingeniería. Programa de Ingeniería Civil. 1998.
description: El presente estudio tiene por objeto determinar el efecto y cuantificar la incidencia que tienen los corredores comerciales, residencial y residencial-agropecuario sobre la velocidad de los vehículos, en aquellos tramos de vías rurales, sobre terreno plano, que se encuentran bordeando una población, ciudad o municipio.
Project Monitoring and Evaluation Practices in Ethiopian Non-Governmental Projects: The Case of Selected NGOs in Addis Ababa
Creators: name: Teshome, Biniam
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: A good monitoring and evaluation system is a key ingredient to good performance of a project. It is a way of being answerable and signifying transparency to the stakeholders as it provides for accountability and transparency. It also assists learning of an organization by documenting lessons gained during the execution of the projects and using the same in the ensuing project planning and implementation or by sharing with other implementers the experience earned. The objective of this research is to assess the practice of M&E in 10 Ethiopian NGOs, the main reason why they adopt it, and the challenges they experienced while practicing. To achieve the study objective an exploratory design with a qualitative approach has been employed. The primary data were collected through survey questionnaire and making interview of M&E expertise in the 10 NGOs. The findings of the study shows that the M&E practice of the NGOs under study is hindered by inadequate fund allocated to M&E, absence of sufficient M&E expertise, non-involvement of stakeholders specifically beneficiaries in M&E process, not documenting lessons learned, and selective dissemination of M&E findings. The main driver of the M&E practice is to be accountable and transparent to the donors. Generally the research recommends the allocation of enough fund and resources, amendment of proclamation number 621/2009and introduction of participatory approach.
Fast analytic solver of rational Bethe equations
Creators: name: Marboe, Christian
name: Volin, Dmytro
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In this note we propose an approach for a fast analytic determination of all possible eigenstates of rational GL(N|M) integrable spin chains of given not too large length, in terms of Baxter Q-functions. We observe that all exceptional solutions, if any, are automatically correctly accounted. The key intuition behind the approach is that the equations on the Q-functions are determined solely by the Young diagram, and not by the choice of the rank of the GL symmetry. Hence we can choose arbitrary N and M that accommodate the desired representation. Then we consider all distinguished Q-functions at once, not only those following a certain Kac-Dynkin path.
description: 12 pages, 4 figures. v2: minor changes, added discussion in Mathematica notebook
Caracterización microbiológica y molecular de patógenos emergentes: Anaplasma SPP, Babesia SPP y Ehrlichia SPP causantes de antropozoonosis en la ciudad de Cartagena 2015
Creators: name: Gómez Arcila, Verónica
Publisher: name: Universidad de Cartagena
Year: 2015
Subjects: subject: Zoonósis
subject: Enfermedades zoonóticas
subject: Enfermedades transmisibles
subject: Microbiología médica

description: Las zoonosis emergentes, son enfermedades infecciosas transmitidas por vectores invertebrados, que han cobrado gran importancia y continúan en expansión geodemográfica. Sin embargo, aún es desconocido el impacto de estas entidades en países tropicales como Colombia, donde el número de casos transmitidos por estos vectores se ha pronunciado de forma silente, con identificación de eventos fortuitos que han llegado, incluso, a ser letales. Por lo tanto, el conocimiento y comportamiento de estas entidades juega un papel crucial en la identificación de los casos y diagnóstico temprano a través de metodologías diagnósticas eficaces. Objetivo: Realizar la detección microbiológica y molecular de los patógenos emergentes: Anaplasma spp, Ehrlichia spp y Babesia spp, causantes de zoonosis y su caracterización clínica en pacientes de la ciudad de Cartagena en el año 2015. Métodos: Estudio descriptivo, transversal. Que evaluó las características epidemiológicas, clínicas, microbiológicas y moleculares de los pacientes febriles incluidos en el estudio previo consentimiento informado. Posterior a la toma de muestra sanguínea de los pacientes, el ADN genómico fue extraído, seguido de su cuantificación, valoración de integridad y pureza. La presencia de patógenos (Anaplasma spp., Ehrlichia spp. y Babesia spp.) fue analizada a través de la reacción en cadena de la polimerasa (PCR). Resultados: Fue recolectada la información de 175 pacientes, en quienes fueron identificados los microorganismos: Anaplasma spp. (2,7%) y Babesia spp (1,3%). Al análisis de la especie, dichas muestras, dieron positivas para A. phagocytophilum (1/2) y B. microti (1/1) respectivamente. Respecto a la detección microbiológica, fueron detectadas mórulas típicas en los neutrófilos (5,3%) y trofozoitos en forma anular y piriformes dentro de los eritrocitos (1,3%). Conclusión: este es el primer estudio que utiliza métodos moleculares en el Caribe Colombiano para determinar la presencia de patógenos emergentes Anaplasma spp., Ehrlichia spp. y Babesia spp. en humanos, constatando la prueba de PCR convencional como una herramienta sensible y específica para el diagnóstico y mandatorio ante pacientes con factores de riesgo asociados a zoonosis.
Relation between state-distinction power and disturbance in quantum measurements
Creators: name: Hamamura, Ikko
name: Miyadera, Takayuki
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The measurement of an informative observable strongly disturbs a quantum state. We examine the so-called information-disturbance relation by introducing order relations based on the state distinction power of an observable and a variety of non-disturbed observables with respect to a channel, and obtain qualitative and quantitative representations.
Análisis comparativo de la nueva política económica -NEP- formulada por Lennin y la reforma radical de la economía de Gorbachov
Creators: name: Cotte B, Jorge Luis
name: Villalobos C, Juan Fernando
Publisher: name: Universidad de Cartagena
Year: 1990
Subjects: Política económica

description: Tesis (Economista).--Universidad de Cartagena. Facultad de Ciencias Económicas. Programa de Economía, 1990.
description: El presente estudio tiene por objeto demostrar que las reformas económicas introducidas en la U.R.S.S. con la "Perestroika" responden tanto a la necesidad de solucionar los problemas socioeconomicos que padece desde hace tiempo el pueblo soviético como una concepción ideológica-política de los comunistas de dicho país.
Análisis del comportamiento hidrogeológico del flujo de aguas subterráneas en la cabecera municipal de Turbaco Bolívar
Creators: name: Barrios Quintero, Ricardo José
name: Correa Jiménez, Augusto Said
Publisher: name: Universidad de Cartagena
Year: 2016
Subjects: Aguas subterráneas
Hidrogeologia

description: Tesis (Ingeniero Civil).--Universidad de Cartagena. Facultad de Ciencias E Ingenierías. Programa de Ingeniería Civil, 2016
description: El presente proyecto corresponde al informe final de las actividades del “Análisis del comportamiento hidrogeológico del flujo de aguas subterráneas en la cabecera municipal de Turbaco-Bolívar” cuyo objetivo principal es el desarrollo de un modelo conceptual que analice el funcionamiento de las aguas subterráneas ubicadas en el Municipio de Turbaco, centrándose principalmente en la cabecera municipal.
Chromatin Dynamics During Murine Spermatogonial Development
Creators: name: Schleif, Mary Christine
Publisher: name: Washington State University
Year: 2022
Subjects: Chromatin
Retinoic Acid
Testis

description: Male infertility is a growing concern in our world today. Issues with spermatogenesis, specifically spermatogonial development, can lead to infertility or subfertility in men. Within the complex process of spermatogenesis, the germ cells have profound transcriptional and morphological changes. One key point in spermatogenesis where the aforementioned changes occur is at the point of spermatogonial differentiation. This differentiation event is mediated by retinoic acid (RA) to irreversibly commit the germ cells to spermatogenesis, inciting transcriptional and morphological changes. While these two changes have received great attention, there is a lack of understanding of epigenetic mechanisms influencing male germ cell development. Previous studies using transmission electron microscopy have revealed that chromatin compaction increases during spermatogonial development; however, it is unknown where in the genome this compaction occurs. Within this work, we aimed to better understand the dynamics of chromatin accessibility in relation to RA action during spermatogonial development via ATAC-seq on multiple spermatogonial subtypes. By synchronizing the testis, we were able to isolate four subpopulations of spermatogonia corresponding with undifferentiated spermatogonia, A1/A2 spermatogonia, A3 spermatogonia, and B spermatogonia. These ATAC-seq data revealed that following RA administration, there was over a 59% decrease of accessible regions within the genome. Of all assayed cell populations, 68-89% of all accessible regions were within 10 kb of an annotated gene, and 72.8% remained accessible across all four time points. Further analysis showed the majority of these accessible genes were accessible at, or just upstream of their transcription start site (TSS) at all time points. Investigation of spermatogonial genes (Neurog3, Sox3, Zbtb16, Lin28a, Nanos2, Pou5f1), as well as common immunohistochemical markers of differentiating spermatogonia (Kit, Stra8), revealed accessible chromatin at all assayed timepoints largely surrounding the TSS. Together these data support the conclusion that RA is triggering large-scale chromatin condensation. However, it appears this condensation of the chromatin is more structural rather than transcriptional in nature.
Beiträge zur 10. DAfStb-Jahrestagung mit 62. Forschungskolloquium. - 26./27. September 2023 RWTH Aachen University
Creators: name: Hegger, Josef
name: Claßen, Martin
name: Raupach, Michael
name: Matschei, Thomas
name: Schmidt, Maximilian
name: Alvarez y Leal, Angela
Publisher: name: RWTH Aachen University
Year: 2023

description: 10. Jahrestagung des Deutschen Ausschuss für Stahlbeton, Aachen, Germany, 26 Sep 2023 - 27 Sep 2023 62. Forschungskolloquium des Deutschen Ausschuss für Stahlbeton, Aachen, Germany, 26 Sep 2023 - 27 Sep 2023; Aachen : Fakultät für Bauingenieurwesen, RWTH-Aachen University 275 Seiten (2023).
description: Published by Fakultät für Bauingenieurwesen, RWTH-Aachen University, Aachen
title: BEYOND GEOGRAPHY
title: RURAL AND URBAN PLACE-BASED IDENTITY AND PARTISANSHIP IN THE UNITED STATES
titleType: Subtitle
Creators: name: Chatburn, Timothy  Clark
Publisher: name: Washington State University
Year: 2022
Subjects: partisanship
rural urban divide
social identity
Political Geography

description: In the United States, over the past 30 years, the differences between cities and the countryside have contributed to one of the most noticeable political divides in the country. Why are rural Americans siding with the Republican party, and why are urban Americans siding with the Democratic party? The recent and rapid alignment of partisan voting with geographic area suggests that there is more to the partisan differences in rural and urban America than just residing in a rural or urban area. Explanations such as economics, race, and morals are often forwarded to explain political divides across rural and urban America; however, these explanations fail to fully explain why these factors lead to a consistent pattern of partisanship in rural and urban areas. Socio-economic conditions vary across both rural and urban communities and should create a larger variety of partisan outcomes. In this dissertation, I will build on the recent argument that partisanship is a powerful social identity in political contexts and has become entangled with multiple other aspects of peoples’ identities. I will use both original and secondary data to argue that place-based social identity is a key component to understanding why Americans’ partisan attachments are aligning in a specific pattern with geographic places. I utilize an original survey to demonstrate that Americans describe their communities differently than they are categorized by the U.S. Government and many researchers. I then demonstrate that place-based social identity is significantly related to partisanship and explore the relationship between place-based social identity, community types, and partisanship. Next, I utilize an original experiment to test the effects of priming rural and urban identity. I then conduct a series of interviews with people from across the country to explore the relationship between place and partisanship in greater detail. This examination leads to the identification of a specific set of cosmopolitan values that helps explain the connection between urban social identity and partisanship. Next, I further examine the connection between community type, cosmopolitan values, and partisanship. I finish by summarizing the results and discussing the practical and normative implications.