cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Filtración apical en raíces desobturadas parcialmente con técnica térmica o técnica rotatorias de manera inmediata o a las 24 horas
Creators: name: Ortiz Galindo, Antoliano
name: Ramos Manotas, Jacobo Iván
Publisher: name: Universidad de Cartagena
Year: 2011
Subjects: Materiales dentales
Selladores
Endodoncia

description: Tesis (Especialista en Endodoncia). -- Universidad de Cartagena, Facultad de Odontología. Departamento de Investigación, 2011
description: El presente proyecto tiene como objetivo principaEvaluar el grado de microfiltración apical en raíces obturadas con técnica condensación lateral desobturadas parcialmente con una técnica térmica de forma inmediata , comparada con dos técnicas rotatorias una de manera inmediata y otra a las 24 horas con fresas Gatte Glidem
Actions affines isométriques propres des groupes hyperboliques sur des espaces $\ell^{p}$
Creators: name: Alvarez, Aurélien
name: Lafforgue, Vincent
Publisher: name: arXiv
Year: 2016
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: We give a simple and relatively short proof of the following fact: any hyperbolic group admits a proper affine isometric action on a $\ell^p$-space for $p$ large enough. A first proof of this result was given by Guoliang Yu.
description: in French
Calculo estructural del Edificio Copacabana
Creators: name: Trujillo Castellon, Jose Luis
name: Cotes Mendez, Alvaro Enrique
name: Garcia Estarita, Antonio (Asesor)
Publisher: name: Universidad de Cartagena
Year: 1985
Subjects: Diseño de estructura
Instalaciones sanitarias
Edificio Copacabana - Diseño y construcción

description: Tesis (Ingeniero Civil).--Universidad de Cartagena. Facultad de Ciencias E Ingenierías. Programa de Ingeniería Civil, 1985
description: El presente estudio tiene por objeto realizar el calculo estructural de un edificio de 8 pisos que se construirá sobre cimientos superficiales.
Skills that are trending among university librarians and applied to practice..
Creators: name: Ho, Trong Binh
Publisher: name: Zenodo
Year: 2023

description: To keep up with the development trend of the library information industry in the current period in general and meet the requirements of the upward development of Van Lang University in particular. The library of Van Lang University needs to have a plan to train and foster human resources in necessary skills to serve new requirements such as supporting research, training, providing services to users through the form of digital signage. online, developing information products that can be used in the digital environment. In addition, the library's staff has also revealed limitations in capacity and skills during the period of social distancing, when all students have to study online and the library is also forced to adapt. provide products and services online. During that process, there were incidents that occurred due to personnel not being able to adapt as well as lack of knowledge and skills in the digital environment.
The role of selection effects in organizational change: Empirical evidence on worker participation and human resource management practices in Germany
Creators: name: Lang, Julia
Publisher: name: Technische Universität Dortmund
Year: 2013
Subjects: subject: Gewinnbeteiligung
subject: Mitarbeiterbeteiligung
subject: Mitbestimmung
subject: Selektion
subject: Weiterbildung
subject: 330
subject: Gewinnbeteiligung

description: This dissertation tries to obtain a better understanding of how selection effects can affect the analysis of human resource management practices or employee participation. The effects of works councils and selected personnel measures in German firms are analysed, where selection on observable and unobservable factors is controlled for by using matching techniques and difference-in-differences. Chapter 2 shows that works councils are rather implemented in firms where employees are afraid of losing their job but also in firms with relatively high wages. The introduction of a works council has no effect on several outcomes like wages, employee turnover and overtime work, but a positive effect on workers’ perceived job security. Thus, the aim of works councils seems to be rent protection rather than rent seeking. In Chapter 3 the effects of profit sharing on productivity are analysed. As profit sharing means that wages directly depend on the firm’s performance, incentive effects are expected. The study shows that – although profit sharing positively affects productivity - effects are overestimated if selection is not taken into account. Profit sharing can also affect different outcomes, e.g. investments in human capital, which is analysed in Chapter 4. The results indicate that firms which introduce profit sharing have a higher increase in training intensity compared to firms without profit sharing. However, this is only the case if the majority of employees participate in profits. Chapter 5 shows how training can affect workers’ labour market success. Older and younger workers have different aims when participating in training which also reflects in different effects. Younger participants profit from training by an increase in wages whereas older participants experience an increase in perceived job security.
Nonparametric tests for tail monotonicity
Creators: name: Berghaus, Betina
name: Bücher, Axel
Publisher: name: Technische Universität Dortmund
Year: 2013
Subjects: subject: copula
subject: left tail decreasing
subject: multiplier bootstrap
subject: ranks
subject: tail monotonicity
subject: 310
subject: 330
subject: 620

description: This article proposes nonparametric tests for tail monotonicity of bivariate random vectors. The test statistic is based on a Kolmogorov-Smirnov-type functional of the empirical copula. Depending on the serial dependence features of the data, we propose two multiplier bootstrap techniques to approximate the critical values. We show that the test is able to detect local alternatives converging to the null hypothesis at rate n^-1/2 with a non-trivial power. A simulation study is performed to investigate the finite-sample performance and finally the procedure is illustrated by testing intergenerational income mobility.
description: Discussion Paper / SFB 823;7/2013
Amtliche Mitteilungen der Universität Dortmund Nr. 12/98
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Dortmund
Year: 1998
Subjects: subject: 080

description: Nichtamtlicher Teil: Diplomprüfungsordnung für den Studiengang Wirtschaftsmathematik an der Universität Dortmund vom 27. Februar 1998
description: Amtliche Mitteilungen der Universität Dortmund ; 12, 1998
Estudio y análisis de vulnerabilidad sísmica del Hospital Universitario de Cartagena
Creators: name: Florez Martinez, Hernando Enrique
name: Meza Guanipa, Ricardo Jose
Publisher: name: Universidad de Cartagena
Year: 2005
Subjects: Resistencia de materiales
Estructuras sismo resistentes
Esfuerzos y deformaciones

description: Tesis (Ingeniero Civil) -- Universidad de Cartagena. Facultad de Ciencias Económicas E Ingeniería. Programa de Ingeniería Civil. 2005.
description: El presente estudio tiene por objeto de evaluar la resistencia de la estructura a la luz de la normatividad actual.
Assessment of Project Quality Management Practices: Case Study of Ethiopian Construction Design and Supervision Works Corporation (ECDSWCo.)
Creators: name: Dinku, Rahel
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: Quality must be recognized from the point of importance, at the same level as the scope, time and costs of project. Building projects that are delivered within estimated cost, specified quality and calculated time can greatly satisfy client, contractor and consultant and the project can be said it is delivered in successful manner. As researches indicate, many building projects in Ethiopia are not delivered successfully to the client. This research is intended to describe the project quality management practice of Ethiopian Construction Design and Supervision Works Corporation (ECDSWCo.). The study used descriptive type of design to meet its objective. Questionnaire was used as a tool for primary data collection and was prepared in a way to address three project quality management implementation factors. The factors tried to be addressed are communication of quality information, Employees training and participation and top management participation in project quality management. The researcher took a sample size of 60 from employees of ECDSWCo water sector who are believed to have project quality management responsibility. The data collected through questionnaire was analyzed using SPSS. The findings of the study indicate that the top management of ECDSWCo. is committed in the project quality planning process to higher degree than the project quality assurance and project quality control processes. The free flow of quality information with in project team is in higher level than between sections and with customers. Finally, it can be inferred from the findings that training is provided to employees to equip them with the necessary competencies. But employee's participation in project quality programs and awareness on their contribution to project quality is minimal.
Upscaling High-Quality CVD Graphene Devices to 100 Micron-Scale and Beyond
Creators: name: Lyon, Timothy J.
name: Sichau, Jonas
name: Dorn, August
name: Zurutuza, Amaia
name: Pesquera, Amaia
name: Centeno, Alba
name: Blick, Robert H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We describe a method for transferring ultra large-scale CVD-grown graphene sheets. These samples can be fabricated as large as several cm$^2$ and are characterized by magneto-transport measurements on SiO$_2$ substrates. The process we have developed is highly effective and limits damage to the graphene all the way through metal liftoff, as shown in carrier mobility measurements and the observation of the quantum Hall effect. The charge-neutral point is shown to move drastically to near-zero gate voltage after a 2-step post-fabrication annealing process, which also allows for greatly diminished hysteresis.
description: 5 pages, 5 figures. Revision includes updated title, figures updated with extra labels and to be compatible with black and white printing, and various minor edits. Added publication information
Thermal Hall effect in a phonon-glass Ba$_3$CuSb$_2$O$_9$
Creators: name: Sugii, Kaori
name: Shimozawa, Masaaki
name: Watanabe, Daiki
name: Suzuki, Yoshitaka
name: Halim, Mario
name: Kimata, Motoi
name: Matsumoto, Yosuke
name: Nakatsuji, Satoru
name: Yamashita, Minoru
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A distinct thermal Hall signal is observed in a quantum spin liquid candidate Ba$_3$CuSb$_2$O$_9$. The transverse thermal conduction shows a power-law temperature dependence below 40 K where a spin gap opens. We suggest that, through the very low longitudinal thermal conductivity and the thermal Hall signals, a phonon Hall effect is induced by strong phonon scatterings by orphan Cu$^{2+}$ spins formed in random domains of Cu$^{2+}$-Sb$^{5+}$ dumbbells.
title: Kollektives Handeln zur Produktion und Allokation von Clubgütern im deutschen Profifußball
title: Oder: Warum lassen sich die Interessen kleiner Vereine trotz Mehrheit nur schwer organisieren?
titleType: AlternativeTitle
Creators: name: Blutner, Doris
name: Wilkesmann, Uwe
Publisher: name: Technische Universität Dortmund
Year: 2007
Subjects: subject: Fußballverein
subject: Kollektives Handeln
subject: Verein / Wirtschaftlichkeit
subject: 300

description: In diesem Artikel wird gezeigt, dass die Organisation von Fußball kollektives Handeln voraussetzt, weil es sich um ein Clubgut handelt und zwar auf der Ebene der Vereine und der Verbände. Im Profifußball muss neben der Produktion auch die Allokation durch kollektives Handeln geregelt werden, da in der Allokation das Clubgut teilbar ist. Dies wird am Beispiel der Frage der Verteilung der Fernsehübertragungsgelder aus der Zentralvermarktung analysiert. Die vor diesem theoretischen Hintergrund interessante Frage ist nun, warum sich die Interessen der kleinen Vereine trotz Mehrheit nur schwer organisieren lassen. Mit Hilfe einer empirischen Untersuchung, die die Regelfindung zur Verteilung der Fernsehgelder rekonstruiert, wird diese Frage beantwortet.
description: Discussion Papers / Universität Dortmund, Zentrum für Weiterbildung; 01-2006
Abundance of wild historic behavior
Creators: name: Araujo, Vitor
name: Pinheiro, Vilton
Publisher: name: arXiv
Year: 2016
Subjects: subject: Dynamical Systems (math.DS)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics

description: Using Caratheodory measures, we associate to each positive orbit ${\mathcal O}_{f}^{+}(x)$ of a measurable map $f$, a Borel measure $η_{x}$. We show that $η_{x}$ is $f$-invariant whenever $f$ is continuous or $η_{x}$ is a probability. These measures are used to study the \emph{historic} points of the system, that is, \emph{points with no Birkhoff averages}, and we construct topologically generic subset of \emph{wild historic points} for wide classes of dynamical models. We use properties of the measure $η_x$ to deduce some features of the dynamical system involved, like the \emph{existence of heteroclinic connections from the existence of open sets of historic points}.
description: 34 pages; 4 figures; this version focuses on abundance of wild historic points and leaves the ergodic decomposition and generalized physical measures part for another publication; updated with referees comments and suggestions. To appear in Bull Braz Math Soc
title: Navigation in hypermedialen Systemen
title: Eine Betrachtung anhand des Industriemeisters 2000 und des Altenberger Doms
titleType: AlternativeTitle
Creators: name: Kneupner, Klaus
Publisher: name: Universität Dortmund
Year: 2003
Subjects: subject: Dexter Modell
subject: Hilfsmittel der Navigation
subject: Hypermedia
subject: Navigation
subject: 004

description: Als "Navigation in hypermedialen Systemen" wird im Allgemeinen nur als das Folgen von Verknüpfungen verstanden. Dabei bieten moderne hypermediale Systeme zusätzlich die Möglichkeit, mit Hilfsmitteln wie "Lesezeichen" oder "Historie" zu navigieren. Ausgehend von der Analyse zweier hypermedialer Anwendungen werden allgemeine Eigenschaften von Hilfsmitteln der Navigation bestimmt. Eine Erweiterung des Dexter Modells für die Modellierung von Hilfsmitteln wird vorgestellt. Aufbauend auf dieser Erweiterung sowie auf den Hilfsmitteln wird abschließend eine Definition der Navigation erstellt.
The structure of fixed-point tensor network states characterizes patterns of long-range entanglement
Creators: name: Luo, Zhu-Xi
name: Lake, Ethan
name: Wu, Yong-Shi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The algebraic structure of representation theory naturally arises from 2D fixed-point tensor network states, which conceptually formulates the pattern of long-range entanglement realized in such states. In 3D, the same underlying structure is also shared by Turaev-Viro state-sum topological quantum field theory (TQFT). We show that a 2D fixed-point tensor network state arises naturally on the boundary of the 3D manifold on which the TQFT is defined, and the fact that exactly the same information is needed to construct either the tensor network or the TQFT is made explicit in a form of holography. Furthermore, the entanglement of the fixed-point states leads to an emergence of pre-geometry in the 3D TQFT bulk. We further extend these ideas to the case where an additional global onsite unitary symmetry is imposed on the tensor network states.
description: version 3, figures added
Online system to improve the control of day tour reservations at Hotel Isla del Encanto
Creators: name: García Herrera, María Guadalupe
Publisher: name: Universidad de Cartagena
Year: 2022
Subjects: subject: Day tour
subject: Tourism
subject: FOS: Economics and business
subject: Reservation
subject: Automation

description: Day tour service is seen as an excellence business opportunity considering the fact that Cartagena receives plenty of tourist who want to visit the islands that make up the Corales delRosario National Natural Park. Tourists make their reservations by multiple mechanism, they look forward an unforgettable experience and as a hotel is our duty to make it a reality. However, complications may arise whensales agents receive the information manually. Therefore, the purpose of this research is to develop an online system which helps to channelthe information to have a better control of reservations.
Connections between centrality and local monotonicity of certain functions on $C^*$-algebras
Creators: name: Virosztek, Dániel
Publisher: name: arXiv
Year: 2016
Subjects: subject: Operator Algebras (math.OA)
subject: Mathematical Physics (math-ph)
subject: Functional Analysis (math.FA)
subject: Quantum Physics (quant-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: Primary: 46L05

description: We introduce a quite large class of functions (including the exponential function and the power functions with exponent greater than one), and show that for any element $f$ of this function class, a self-adjoint element $a$ of a $C^*$-algebra is central if and only if $a \leq b$ implies $f(a) \leq f(b).$ That is, we characterize centrality by local monotonicity of certain functions on $C^*$-algebras. Numerous former results (including works of Ogasawara, Pedersen, Wu, and Molnár) are apparent consequences of our result.
description: v2: major revision, stronger result, title changed. v3: minor improvements. v4: published version
ВЕСТНИК ОБРАЗОВАНИЯ И РАЗВИТИЯ НАУКИ РОССИЙСКОЙ АКАДЕМИИ ЕСТЕСТВЕННЫХ НАУК,Выпуск 1 2021
Creators: name: Государственный институт экономики, финансов
Publisher: name: Государственный институт экономики, финансов, права и технологий
Year: 2021

description: ВЕСТНИК ОБРАЗОВАНИЯ И РАЗВИТИЯ НАУКИ РОССИЙСКОЙ АКАДЕМИИ ЕСТЕСТВЕННЫХ НАУК,Выпуск 1 2021
Anti Tuberculosis Drugs Demand Forecasting Practice: The Case Of Ethiopian Pharmaceuticals Supply Agency
Creators: name: Adane, Abyot
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: Interestingly enough, the use of a structured forecasting process may have significant role on companies' performance and not only because forecast accuracy increases. Improving forecast accuracy is often considered a necessity because large forecast errors usually negatively affect companies' operational performance, especially cost and delivery performance. The assessment review report of the EPSA revealed that there was redundant and extended forecasting with high inaccuracy in the procurement of all health commodities including anti TB drugs. The framework structure of this research was designed by the researcher which consists of three categorical variables in which the forecasting practice is the core of the study; adoption of forecasting techniques, the extent of using forecasting in decision making and performance of the forecasting techniques applied by the agency. The research approach applied was a quantitative method. Secondary document review (from HCMIS & routine forecasting and quantification plan of EPSA) was used to gather data for forecast accuracy test. Furthermore, primary data was collected by a structured survey questionnaire designed to a 5 likert scale questions. The purposive sampling technique was used and the total sample size for the survey was 42 for questionnaire and two for document review for five first line anti TB drugs. The data was analyzed by using SPSS and Google sheet. The cronbach's alpha value was 0.804 for all variables which is greater than 0.70, and hence the study instrument was reliable. The survey result of the study showed that the use of structured forecasting technique was below average; 2.63 for "Regression" and 2.95 for "Exponential Smoothing" and a construct average value of 3.18 including "Expert Judgment" whose individual practice was above average; 3.63. The forecast accuracy obtained from the retrospective document review confirmed that there was high forecast error when tested by both MAPE and MAD. The agency should revise its forecasting trend and focus on adopting both scientific and judgmental practices to reduce the negative role of forecasting on purchasing cost, inventory handling cost, distribution cost and also to improve delivery performance; order fill rate, on time delivery and delivery as promise. This study presents only forecasting practice of first line anti TB medicines. The agency is governmental procurement agent for procuring more than thousands health commodities and it is very possible to conduct the study by the same methodology for other products including some qualitative tools.
ВЕСТНИК ОБРАЗОВАНИЯ И РАЗВИТИЯ НАУКИ РОССИЙСКОЙ АКАДЕМИИ ЕСТЕСТВЕННЫХ НАУК,Выпуск 2 2021
Creators: name: Государственный институт экономики, финансов
Publisher: name: Государственный институт экономики, финансов, права и технологий
Year: 2021

description: ВЕСТНИК ОБРАЗОВАНИЯ И РАЗВИТИЯ НАУКИ РОССИЙСКОЙ АКАДЕМИИ ЕСТЕСТВЕННЫХ НАУК,Выпуск 2 2021
Lanelater pulandriensis Akhter, Kabalak, Rizvi & Ahmed 2014
Creators: name: Hoffmannova, Johana
name: Packova, Gabriela
name: Prosvirov, Alexander S.
name: Akhter, Muhammad Atique
name: Kundrata, Robin
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Elateridae
Lanelater
Lanelater pulandriensis

description: Lanelater pulandriensis Akhter, Kabalak, Rizvi & Ahmed, 2014
Lanelater pulandriensis Akhter, Kabalak, Rizvi & Ahmed, 2014: 120.
Distribution. Pakistan (Akhter et al. 2014).
Literature. Akhter et al. (2014: 120): original description, figures of male habitus, pronotum, antenna and genitalia.
description: Published as part of Hoffmannova, Johana, Packova, Gabriela, Prosvirov, Alexander S., Akhter, Muhammad Atique & Kundrata, Robin, 2023, An updated catalogue of Agrypninae (Coleoptera: Elateridae) from Pakistan, pp. 281-305 in Zootaxa 5270 (2) on page 300, DOI: 10.11646/zootaxa.5270.2.6, http://zenodo.org/record/7864780
Nature of Spin Excitations in Two-Dimensional Mott Insulators: Undoped Cuprates and Other Materials
Creators: name: Anderson, P. W.
name: Ho, Chang-Ming
name: Muthukumar, V. N.
name: Ogata, Masao
Publisher: name: The American Physical Society
Year: 2001
Subjects: subject: 530

description: Physical Review Letters
Intrinsic Light Field Images
Creators: name: Garces, Elena
name: Echevarria, Jose I.
name: Zhang, Wen
name: Wu, Hongzhi
name: Zhou, Kun
name: Gutierrez, Diego
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: We present a method to automatically decompose a light field into its intrinsic shading and albedo components. Contrary to previous work targeted to 2D single images and videos, a light field is a 4D structure that captures non-integrated incoming radiance over a discrete angular domain. This higher dimensionality of the problem renders previous state-of-the-art algorithms impractical either due to their cost of processing a single 2D slice, or their inability to enforce proper coherence in additional dimensions. We propose a new decomposition algorithm that jointly optimizes the whole light field data for proper angular coherence. For efficiency, we extend Retinex theory, working on the gradient domain, where new albedo and occlusion terms are introduced. Results show our method provides 4D intrinsic decompositions difficult to achieve with previous state-of-the-art algorithms. We further provide a comprehensive analysis and comparisons with existing intrinsic image/video decomposition methods on light field images.
Analytic Interatomic Forces in the Random Phase Approximation
Creators: name: Ramberger, Benjamin
name: Schäfer, Tobias
name: Kresse, Georg
Publisher: name: arXiv
Year: 2016
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We discuss that in the random phase approximation (RPA) the first derivative of the energy with respect to the Green's function is the self-energy in the GW approximation. This relationship allows us to derive compact equations for the RPA interatomic forces. We also show that position dependent overlap operators are elegantly incorporated in the present framework. The RPA force equations have been implemented in the projector augmented wave formalism, and we present illustrative applications, including ab initio molecular dynamics simulations, the calculation of phonon dispersion relations for diamond and graphite, as well as structural relaxations for water on boron nitride. The present derivation establishes a concise framework for forces within perturbative approaches and is also applicable to more involved approximations for the correlation energy.
description: 5 pages, 3 figures
Emergence of singularities from decoherence: Quantum catastrophes
Creators: name: Goldberg, Aaron Z.
name: Al-Qasimi, Asma
name: Mumford, J.
name: O'Dell, D. H. J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We use a master equation to study the dynamics of two coupled macroscopic quantum systems (e.g.\ a Josephson junction made of two Bose-Einstein condensates or two spin states of an ensemble of trapped ions) subject to a weak continuous measurement. If the coupling between the two systems is suddenly switched on the resulting dynamics leads to caustics (fold and cusp catastrophes) in the number-difference probability distribution, and at the same time the measurement gradually induces a quantum-to-classical transition. Decoherence is often invoked to help resolve paradoxes associated with macroscopic quantum mechanics, but here, on the contrary, caustics are well-behaved in the quantum (many-particle) theory and divergent in the classical (mean-field) theory. Caustics thus represent a breakdown of the classical theory towards which decoherence seems to inevitably lead. We find that measurement backaction plays a crucial role in softening the resulting singularities and calculate the modification to the Arnol'd index which governs the scaling of the caustic's amplitude with the number of atoms. The Arnol'd index acts as a critical exponent for the formation of singularities during quantum dynamics and its modification by the open nature of the system is analogous to the modification of the critical exponents of phase transitions occurring in open systems.
description: 14 pages, 8 figures. New version has a fourth author and introduces the idea of the modification of the Arnold scaling exponent by decoherence
Quantum back action evading measurement of motion in a negative mass reference frame
Creators: name: Møller, Christoffer B.
name: Thomas, Rodrigo A.
name: Vasilakis, Georgios
name: Zeuthen, Emil
name: Tsaturyan, Yeghishe
name: Jensen, Kasper
name: Schliesser, Albert
name: Hammerer, Klemens
name: Polzik, Eugene S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Atomic Physics (physics.atom-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Quantum mechanics dictates that a continuous measurement of the position of an object imposes a random back action perturbation on its momentum. This randomness translates with time into position uncertainty, thus leading to the well known uncertainty on the measurement of motion. Here we demonstrate that the quantum back action on a macroscopic mechanical oscillator measured in the reference frame of an atomic spin oscillator can be evaded. The collective quantum measurement on this novel hybrid system of two distant and disparate oscillators is performed with light. The mechanical oscillator is a drum mode of a millimeter size dielectric membrane and the spin oscillator is an atomic ensemble in a magnetic field. The spin oriented along the field corresponds to an energetically inverted spin population and realizes an effective negative mass oscillator, while the opposite orientation corresponds to a positive mass oscillator. The quantum back action is evaded in the negative mass setting and is enhanced in the positive mass case. The hybrid quantum system presented here paves the road to entanglement generation and distant quantum communication between mechanical and spin systems and to sensing of force, motion and gravity beyond the standard quantum limit.
description: 20 pages, 6 figures, 1 table
Eficacia de un programa de capacitación a madres de recién nacidos prematuros hospitalizados en unidades de cuidado intensivo neonatal
Creators: name: Domínguez, Anyuli Sofía German
Publisher: name: Universidad de Cartagena
Year: 2017
Subjects: Enfermería materno-infantil
Niños recién nacidos - Atención al enfermo

description: Tesis (Magister en Enfermería con énfasis en el cuidado a las personas y colectivos). -- Universidad de Cartagena. Facultad de Enfermería, 2017
description: Dentro de esta investigación, se busca evaluar la eficacia de un programa de capacitación, sobre la participación, el estrés y valoración del cuidado de enfermería, en madres de prematuros hospitalizados en unidades de cuidado intensivo neonatal en Medellín.
Manual de Organización y de funciones administrativas y operativas del Departamento Administrativo de Transito y Transporte de Cartagena de Indias D.T. y C. D.A.T.T.
Creators: name: De La Cruz Ordosgoitia, Cesar
name: Visbal Rodriguez, Rodolfo
Publisher: name: Universidad de Cartagena
Year: 1991
Subjects: Organización
Manual de funciones

description: Tesis (Administrador de Empresas). Universidad de Cartagena. Facultad de Ciencias Económicas. Programa de Administración de Empresas. 1991.
description: El presente trabajo pretende aportar elementos fundamentales para mejorar el funcionamiento administrativo actual que se presenta en el Departamento administrativo de transito y transporte D.A.T.T, entre los que se encuentra la elaboración de un manual . de organización y de funciones administrativa y operativas, contribuyendo con esto a alcanzar la eficiencia organizacional y los objetivos propuestos por dicha entidad.
Assessing The Factors That Contribute For The Performance Of CFM56 Engine In The Case Of Ethiopian Airlines
Creators: name: Teketay, Derib
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: Following the CFM56 overhaul capability development Ethiopian airlines aspires to boost revenue from customer engine maintenance. However, there are questions to be raised from different stakeholders.The purpose of this research is to assess the current performance of CFM56 Engine maintenance in different parameters, to look the past, current and future industry practice regarding MRO business in comparison with vision 2025 road map and give recommendation. Publications from several sources have been discovered to bring relevant resolution method for the stated problem of study. To avoid bias, different sources have been used from all concerned bodies such as customer opinion from market perspective, international aviation MRO publications, historical performance data and also primary sources from employees from different departments and positions. Descriptive research design is implemented during the analysis of results and findings of a research work. Viable instruments were used in the methodology section to secure the required data to properly answer the research question. The collected data was analyzed and the major findings isolated. Based on findings and the literature survey, a two-section solution is forwarded. One is a generic model that can be adapted to the other processes of the airline. The second is an alternative way to form a joint venture with the selected OEM to cope up the worldwide market fierce competition in this sector. The specific result of the case study can be adapted to the other organizations in Ethiopia. In addition what should be done to recover CFM56-3 engine of-design performance problem discussed and recommendation forwarded. Finally the results of a research work are summarized, concluded and recommendations are given to bring a solution for performance improvement in the area of study
Optimum gain for plasmonic distributed feedback lasers
Creators: name: Zyablovsky, A. A.
name: Nechepurenko, I. A.
name: Andrianov, E. S.
name: Dorofeenko, A. V.
name: Pukhov, A. A.
name: Vinogradov, A. P.
name: Lisyansky, A. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Although nanolasers typically have low Q-factors and high lasing thresholds, they have been successfully implemented with various gain media. Intuitively, it seems that an increase in the gain coefficient would improve the characteristics of nanolasers. For a plasmonic nanolaser, in particular, a distributed-feed-back (DFB) laser, we propose a self-consistent model that takes into account both spontaneous emission and the multimode character of laser generation to show that for a given pumping strength, the gain coefficient has an optimal value at which the radiation intensity is at a maximum and the radiation linewidth is at a minimum.
Analysis of Artificial Dissipation of Explicit and Implicit Time-Integration Methods
Creators: name: Öffner, Philipp
name: Glaubitz, Jan
name: Ranocha, Hendrik
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: Stability is an important aspect of numerical methods for hyperbolic conservation laws and has received much interest. However, continuity in time is often assumed and only semidiscrete stability is studied. Thus, it is interesting to investigate the influence of explicit and implicit time integration methods on the stability of numerical schemes. If an explicit time integration method is applied, spacially stable numerical schemes for hyperbolic conservation laws can result in unstable fully discrete schemes. Focusing on the explicit Euler method (and convex combinations thereof), undesired terms in the energy balance trigger this phenomenon and introduce an erroneous growth of the energy over time. In this work, we study the influence of artificial dissipation and modal filtering in the context of discontinuous spectral element methods to remedy these issues. In particular, lower bounds on the strength of both artificial dissipation and modal filtering operators are given and an adaptive procedure to conserve the (discrete) $\mathbf{L}_2$ norm of the numerical solution in time is derived. This might be beneficial in regions where the solution is smooth and for long time simulations. Moreover, this approach is used to study the connections between explicit and implicit time integration methods and the associated energy production. By adjusting the adaptive procedure, we demonstrate that filtering in explicit time integration methods is able to mimic the dissipative behavior inherent in implicit time integration methods. This contribution leads to a better understanding of existing algorithms and numerical techniques, in particular the application of artificial dissipation as well as modal filtering in the context of numerical methods for hyperbolic conservation laws together with the selection of explicit or implicit time integration methods.
Vacuum Radiation Pressure Fluctuations and Barrier Penetration
Creators: name: Huang, Haiyun
name: Ford, L. H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We apply recent results on the probability distribution for quantum stress tensor fluctuations to the problem of barrier penetration by quantum particles. The probability for large stress tensor fluctuations decreases relatively slowly with increasing magnitude of the fluctuation, especially when the quantum stress tensor operator has been averaged over a finite time interval. This can lead to large vacuum radiation pressure fluctuations on charged or polarizable particles, which can in turn push the particle over a potential barrier. The rate for this effect depends sensitively upon the details of the time averaging of the stress tensor operator, which might be determined by factors such as the shape of the potential. We make some estimates for the rate of barrier penetration by this mechanism and argue that in some cases this rate can exceed the rate for quantum tunneling through the barrier. The possibility of observation of this effect is discussed.
description: 30 pages, 4 figures. Additional references and discussion added, and typos corrected. Conclusions unchanged
Patrones de mezcla de las descargas de aguas residuales en el Mar Caribe provenientes del Emisario Submarino de Cartagena de Indias mediante trazadores fluorescentes
Creators: name: Romero Sierra, Nora Carolina
name: Segrera Cabarcas, Laura Victoria
Publisher: name: Universidad de Cartagena
Year: 2019
Subjects: Aguas residuales - Tratamientos
Impacto ambiental
Protección del medio ambiente

description: Tesis (Ingeniero Civil).--Universidad de Cartagena. Facultad de Ciencias E Ingenierías. Programa de Ingeniería Civil, 2019
description: El presente estudio tiene por objeto analizar los patrones de mezcla de las descargas de aguas residuales en el Mar Caribe provenientes del emisario submarino de Cartagena de Indias mediante trazadores fluorescentes, con el fin de delimitar la zona de impacto y sugerir puntos de monitoreo a la calidad del agua.
Generalized Einstein-Scalar-Maxwell theories and locally geometric U-folds
Creators: name: Lazaroiu, C. I.
name: Shahbazi, C. S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Differential Geometry (math.DG)
subject: Symplectic Geometry (math.SG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We give a global formulation of the coupling of four-dimensional scalar sigma models to Abelian gauge fields for the generalized situation when the "duality structure" of the Abelian gauge theory is described by a flat symplectic vector bundle $(\mathcal{S},D,ω)$ defined over the scalar manifold $\mathcal{M}$. The construction uses a taming of $(\mathcal{S}, ω)$, which encodes globally the inverse gauge couplings and theta angles of the "twisted" Abelian gauge theory in a manner that makes no use of duality frames. We show that global solutions of the equations of motion of such models give classical locally geometric U-folds. We also describe the groups of duality transformations and scalar-electromagnetic symmetries arising in such models, which involve lifting isometries of $\mathcal{M}$ to a particular class of flat automorphisms of the bundle $\mathcal{S}$ and hence differ from expectations based on local analysis. The appropriate version of the Dirac quantization condition involves a discrete local system defined over $\mathcal{M}$ and gives rise to a smooth bundle of polarized Abelian varieties, endowed with a flat symplectic connection. This shows that a generalization of part of the mathematical structure familiar from $\mathcal{N}=2$ supergravity is already present in such purely bosonic models, without any coupling to fermions and hence without any supersymmetry.
description: 81 pages. Exposition improved and example of a simple non-trivial duality structure added
Cellular Characterization of SARS Coronavirus Nucleocapsid
Creators: name: Choi, Yook-Wah
name: Fielding, Burtram
name: Goh, Phuay-Yee
name: Hong, Wanjin
name: Lim, Seng Gee
name: Ooi, Eng-Eong
name: Shuo, Shen
name: Tan, Timothy H. P.
name: Tan, Yee-Joo
Publisher: name: Technische Universität Dortmund
Year: 2004
Subjects: subject: coronavirus
subject: fixation
subject: nucleocapsid
subject: nucleolus
subject: SARS
subject: transduction
subject: 610

description: The Severe and Acute Respiratory Syndrome coronavirus (SARS CoV) is a newly-emerged virus that caused an outbreak of atypical pneumonia in the winter of 2002-2003. Polyclonal antibodies raised against the nucleocapsid (N) of the SARS CoV showed the localization of N to the cytoplasm and the nucleolus in virus-infected and N-expressing Vero E6 cells. Like other coronavirus N proteins, the SARS N is probably a phosphoprotein. N protein expressed in mammalian cells is apparently able to "spread" to neighboring cells. For N to spread to neighboring cells, it must be exported out of the expressing cells. This is shown by the immunoprecipitation of N from the culture medium of a stable cell line expressing myc-N. Deletion studies showed that the 27 kD C-terminal domain of N (C1/2) is the minimal region of N that can spread to other cells. The nucleolar localization and spreading of N are artefacts of fixation, reminiscent of other protein-transduction domain (PTD)-containing proteins.
description: EXCLI Journal ; Vol. 3, 2004
Tsirelson's problem and an embedding theorem for groups arising from non-local games
Creators: name: Slofstra, William
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: Group Theory (math.GR)
subject: Operator Algebras (math.OA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Tsirelson's problem asks whether the commuting operator model for two-party quantum correlations is equivalent to the tensor-product model. We give a negative answer to this question by showing that there are non-local games which have perfect commuting-operator strategies, but do not have perfect tensor-product strategies. The weak Tsirelson problem, which is known to be equivalent to Connes embedding problem, remains open. The examples we construct are instances of (binary) linear system games. For such games, previous results state that the existence of perfect strategies is controlled by the solution group of the linear system. Our main result is that every finitely-presented group embeds in some solution group. As an additional consequence, we show that the problem of determining whether a linear system game has a perfect commuting-operator strategy is undecidable.
description: Update to match published version, including a new background section on quantum correlation sets, fixes to the definition of pictures in Section 6 (the previous definition using smooth curves allowed some pathological behaviour), and other minor changes throughout. 66 pages, 36 figures
The effect of Quality and Selected Standards on the Safety and Convenience of the Occupants in the Building Projects of Addis Ababa
Creators: name: Dereje, Daniel
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: The Study is about the effect of quality and selected standards on the safety and convenience of the occupants in building projects of Addis Ababa, specifically focusing on three standards in particular, access to the physically challenged, emergency exits (means of egress), and sufficient parking lots for the occupants of the building. Standards and regulations are few of the inputs to quality planning; the project aims in identifying whether standards and regulations are considered when designing the buildings in Addis Ababa, and check if quality is planned not inspected in. The study plans to find out where the gap exists and why the aforementioned standards aren't being included in the buildings of Addis Ababa, to help further constructions would be built with the standards making the city's buildings safe and accessible. The participants of the study are registered members of the Ethiopian Consulting Engineers and Architects Association consulting offices. The number of the population is 42, with a sample size of 36. The participants were selected by using simple random sampling technique, using the lottery method. The method of analysis used is mixed method; both qualitative and quantitative are used. To assess the effect of state of quality standards in the city's buildings, a questionnaire was distributed to thirty six engineering consulting offices and a semi structured interview was held to assess the problems they face. The results reveal that there is no significant gap in the designing stage but the standards don't get implemented for different reasons, among these reasons, the city's administration lack of consistent regulation and clients of the property asking a revision of a design in the process omitting the standards in the process. 47.2% of the firms have quality control department, while some consulting offices claim even though it is not structured as a department the work still gets done by other personnel. The offices have disclosed there are multiple reasons to which they have a problem in incorporating the standards, amongst the reasons that most participants mentioned are, clients manipulating the gap created by the responsible body to get maximum functional area, inconsistency of directives used by the permit issuing authority time and again, space limitation provided by the city administration, inappropriate conduct of the permit issuing officer are the few. The study's recommendation is, as the standards exist in the directives as well as in the occupancy permit check list, but the problems still exist, to involve stakeholders (users of the buildings) involvement in giving the occupancy permit process.
Nonmonotonic Aging and Memory Retention in Disordered Mechanical Systems
Creators: name: Lahini, Yoav
name: Gottesman, Omer
name: Amir, Ariel
name: Rubinstein, Shmuel M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We observe non-monotonic aging and memory effects, two hallmarks of glassy dynamics, in two disordered mechanical systems: crumpled thin sheets and elastic foams. Under fixed compression, both systems exhibit monotonic non-exponential relaxation. However, when after a certain waiting time the compression is partially reduced, both systems exhibit a non-monotonic response: the normal force first increases over many minutes or even hours until reaching a peak value, and only then relaxation is resumed. The peak-time scales linearly with the waiting time, indicating that these systems retain long-lasting memory of previous conditions. Our results and the measured scaling relations are in good agreement with a theoretical model recently used to describe observations of monotonic aging in several glassy systems, suggesting that the non-monotonic behavior may be generic and that a-thermal systems can show genuine glassy behavior.
description: 5 pages, 5 figures
Efecto de las decisiones financieras frente a la generación de valor en la evaluación empresarial
Creators: name: Hurtado Ramos, Luís Daniel
name: Varela Sierra, Juan Carlos
Publisher: name: Universidad de Cartagena
Year: 2012
Subjects: Inversiones

description: Tesis (Especialista en Finanzas) – Universidad de Cartagena. Facultad de Ciencias Económicas. Especialización en finanzas, 2012
description: El objetivo de esta investigación busca analizar el impacto que generan las decisiones financieras con el propósito de implementar modelos de planeación estratégica en la propuesta de valor de CMPfarma SAS.