cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
An Interpretable Machine Learning Framework for Modeling High-Resolution Spectroscopic Data
Creators: name: Gully-Santiago, Michael A.
name: Morley, Caroline V.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Comparison of echelle spectra to synthetic models has become a computational statistics challenge, with over ten thousand individual spectral lines affecting a typical cool star echelle spectrum. Telluric artifacts, imperfect line lists, inexact continuum placement, and inflexible models frustrate the scientific promise of these information-rich datasets. Here we debut an interpretable machine-learning framework "blasé" that addresses these and other challenges. The semi-empirical approach can be viewed as "transfer learning" -- first pre-training models on noise-free precomputed synthetic spectral models, then learning the corrections to line depths and widths from whole-spectrum fitting to an observed spectrum. The auto-differentiable model employs back-propagation, the fundamental algorithm empowering modern Deep Learning and Neural Networks. Here, however, the 40,000+ parameters symbolize physically interpretable line profile properties such as amplitude, width, location, and shape, plus radial velocity and rotational broadening. This hybrid data-/model- driven framework allows joint modeling of stellar and telluric lines simultaneously, a potentially transformative step forwards for mitigating the deleterious telluric contamination in the near-infrared. The blasé approach acts as both a deconvolution tool and semi-empirical model. The general purpose scaffolding may be extensible to many scientific applications, including precision radial velocities, Doppler imaging, chemical abundances, and remote sensing. Its sparse-matrix architecture and GPU-acceleration make blasé fast. The open-source PyTorch-based code includes tutorials, Application Programming Interface (API) documentation, and more. We show how the tool fits into the existing Python spectroscopy ecosystem, demonstrate a range of astrophysical applications, and discuss limitations and future extensions.
description: Accepted for publication in ApJ; Open source code available at https://github.com/gully/blase
Estudio de factibilidad para el montaje de una empresa prestadora de los servicios de recolección, reciclaje y eliminación de basuras en el municipio de Arjona - Bolívar
Creators: name: Jinette M, Ramón
name: Velasquez M, Amparo
Publisher: name: Universidad de Cartagena
Year: 1996
Subjects: Estudio de mercado
Estudios de factibilidad
Estudio financiero

description: Tesis (Administrador de Empresas).--Universidad de Cartagena. Facultad de Ciencias Económicas. Programa de Administración de Empresas, 1996
description: El presente estudio tiene por objeto elaborar un estudio de factibilidad para el montaje de una empresa prestadora de los servicios de recolección, reciclaje y eliminación de desechos sólidos que permitan lograr el saneamiento ambiental del casco urbano del municipio de Arjona.
Assessment of Project Implementation process and its Challenges of Permanent Direct Support project, Case study in Addis Ababa
Creators: name: Hailu, Genzeb
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: This study explores the implementation process and factors that challenge the implementation process. Permanent direct support program as a tool for poverty reduction; "The assessment of Implementation process and its challenges" is intended as a first step toward future conceptual refinement and systemic interventions. The study expected to provide meaningful and organized information which helps concerned bodies to make evidence based decision. To conduct this research data were collected from 10 woredas of 5 sub cities including federal and Addis Ababa city administration. These sites were selected randomly from sub cities and woredas which have direct involvement of PDS. Sample respondent for questionnaires were randomly selected where as interviewed participant were purposively selected to address people who have direct involvement in the implementation of PDS. The research is both qualitative and quantitative. In used both primary and secondary data source. The result of the research shows that the project is making good progress although the pace of implementation is slow compared to the design because elements of the PAD & PIM are not fully realized. It was also found that Capacity gaps, limited coordination among stakeholders and absence of organized system are the major challenges of implementation process. To attain the anticipated results of PDS the implementers need to understand how holistic and integrated service delivery through capacitating themselves in human resource, finance and logistics. Furthermore, strong monitoring and evaluation system should be established
Reconstrucción de lazos afectivos entre los estudiantes y las familias de la comunidad educativa de la institución fe y alegría las gaviotas en el año 2008
Creators: name: Girado López, Wendy
Publisher: name: Universidad de Cartagena
Year: 2008
Subjects: subject: Trabajo social - Familia
subject: Trabajo social escolar
subject: Familia - Orientación
subject: Desarrollo de la comunidad - Cartagena (Bolívar, Colombia)

description: Con base al diagnóstico situacional de la institución educativa fe y alegría las gaviotas donde se observaron diversas situaciones relacionadas con el joven su entorno escolar y familiar como son el bajo rendimiento académico, nudos de indisciplina, violencia intrafamiliar, rebeldía, desinterés, irresponsabilidad, en fin un sin número de problemáticas que surgen de la mala convivencia familiar, estos comportamientos se detectaron en el 2° período del año 2007 y han sido una constante en el 1° período del año 2008, es por esto que tanto padres como hijos necesitan de un mayor acercamiento que les permita como mínimo conocer a el otro, saber lo que piensa sueña, vive, conoce, cree etc. Y hacer un acompañamiento, refuerzos y unión en pro del niño o joven que tengan en relación con la institución.
title: Krankheitskosten der juvenilen idiopathischen Arthritis (JIA) in den ersten Erkrankungsjahren
Creators: name: Kurt, Pascale
name: Klotsche, Jens
name: Niewerth, Martina
name: Liedmann, Ina
name: Foeldvari, Ivan
name: Ganser, Gerd
name: Horneff, Gerd
name: Mönkemöller, Kirsten
name: Minden, Kirsten
Publisher: name: German Medical Science GMS Publishing House
Year: 2015
Subjects: subject: 610 Medical sciences; Medicine

description: Einleitung: Die JIA stellt mit über 1.000 Neuerkrankungen pro Jahr in Deutschland die häufigste chronisch entzündlich-rheumatische Erkrankung im Kindes- und Jugendalter dar. Sie ist mit einer enormen finanziellen gesamtgesellschaftlichen Belastung verbunden. Wie sich der Ressourcenverbrauch[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 43. Kongress der Deutschen Gesellschaft für Rheumatologie (DGRh); 29. Jahrestagung der Deutschen Gesellschaft für Orthopädische Rheumatologie (DGORh); 25. wissenschaftliche Jahrestagung der Gesellschaft für Kinder- und Jugendrheumatologie (GKJR)
Optimum Production of Biogas from Bio-Municipal Solid Wastes Using Two Stages Anaerobic Digester
Creators: name: Assefa, Gizachew
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2011

description: Various aspects of Anaerobic Digestion (AD) have been became a promising technology for the management of Municipal Solid Waste. Thus, the objective of this study was to optimize the production of biogas from these wastes by using two-stage anaerobic digester. To achieve this, batch anaerobic digestion experiments were conducted to determine the optimum methane produced from the digestion and co-digestion of Organic Fraction of Municipal Solid Waste (OFMSW) and Cow Manure (CM) in different mix operated under ambient condition. Moreover, this study presents several runs of experiment and analysis with the aim of substrate mix and the duration of overall stage of digestion process while optimizing the biogas generation with higher methane content. The physical and chemical characteristic of the sample done by analytical method, volume of biogas produced and methane composition of different mix of the feed stock were determined by water displacement and digital gas (SR2-BIO gas analyzer), respectively. The highest specific gas production observed was 353 L/Kg VS added for the digestions of 1:2 mix of OFMSW: CM. It was observed that the independent variable – mix ratio significantly affect (p-value 4.18*10-9) the dependent variable – amount of methane produced since the p-value is less than the chosen α-level usually 0.05. The calculated volume of methane in the biogas produced per Kg of volatile solid removed were 510L, 355L, 375L, 435L and 600L for OFMSW (100%), 2:1 mix of OFMSW: CM, CM (100%), 1:1 and 1:2 mix of OFMSW: CM, respectively. In general From the digestion of 1:2 mix of OFMSW: CM: 0.47 m3/d/m3 biogas with 51.5% methane content was produced; 0.45 m3/d/m3, 0.35 m3/d/m3, 0.26 m3/d/m3, and 0.23 m3/d/m3, biogas with 31.4%, 42.9%, 20.3% and 33.7 % methane composition is produced from 1:1 mix of OFMSW: CM, CM alone, OFMSW alone and 2:1 1 mix of OFMSW: CM respectively. The mix ratio significantly affects the biogas production (p-value<<0.05).
Panchromatic HST/WFC3 Imaging Studies of Young, Rapidly Evolving Planetary Nebulae. II. NGC 7027
Creators: name: Baez, Paula Moraga
name: Kastner, Joel H.
name: Balick, Bruce
name: Montez, Rodolfo
name: Bublitz, Jesse
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The iconic planetary nebula (PN) NGC 7027 is bright, nearby (D ~ 1 kpc), highly ionized, intricately structured, and well observed. This nebula is hence an ideal case study for understanding PN shaping and evolution processes. Accordingly, we have conducted a comprehensive imaging survey of NGC 7027 comprised of twelve HST Wide Field Camera 3 images in narrow-band and continuum filters spanning the wavelength range 0.243--1.67 microns. The resulting panchromatic image suite reveals the spatial distributions of emission lines covering low-ionization species such as singly ionized Fe, N, and Si, through H recombination lines, to more highly ionized O and Ne. These images, combined with available X-ray and radio data, provide the most extensive view of the structure of NGC 7027 obtained to date. Among other findings, we have traced the ionization structure and dust extinction within the nebula in sub-arcsecond detail; uncovered multipolar structures actively driven by collimated winds that protrude through and beyond the PN's bright inner core; compared the ionization patterns in the WFC3 images to X-ray and radio images of its interior hot gas and to its molecular outflows; pinpointed the loci of thin, shocked interfaces deep inside the nebula; and more precisely characterized the central star. We use these results to describe the recent history of this young and rapidly evolving PN in terms of a series of shaping events. This evolutionary sequence involves both thermal and ram pressures, and is far more complex than predicted by extant models of UV photoionization or winds from a single central progenitor star, thereby highlighting the likely influence of an unseen binary companion.
description: ApJ, in press; 26 pages, 13 figures, 2 tables
Double Heyting algebras
Creators: name: Taylor, Christopher
Publisher: name: La Trobe
Year: 2023

description: Submission note: A thesis submitted in total fulfilment of the requirements for the degree of Doctor of Philosophy to the School of Engineering and Mathematical Sciences, College of Science, Health and Engineering, La Trobe University, Bundoora, Victoria.

This thesis was a recipient of the Nancy Millis Award for theses of exceptional merit.
Efficient and accurate causal inference with hidden confounders from genome-transcriptome variation data
Creators: name: Wang, Lingfei
name: Michoel, Tom
Publisher: name: arXiv
Year: 2016
Subjects: subject: Genomics (q-bio.GN)
subject: Molecular Networks (q-bio.MN)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: Mapping gene expression as a quantitative trait using whole genome-sequencing and transcriptome analysis allows to discover the functional consequences of genetic variation. We developed a novel method and ultra-fast software Findr for higly accurate causal inference between gene expression traits using cis-regulatory DNA variations as causal anchors, which improves current methods by taking into account hidden confounders and weak regulations. Findr outperformed existing methods on the DREAM5 Systems Genetics challenge and on the prediction of microRNA and transcription factor targets in human lymphoblastoid cells, while being nearly a million times faster. Findr is publicly available at https://github.com/lingfeiwang/findr
description: New result and method sections added. 38 pages, 4 figures, 1 table. Supplementary: 20 pages, 10 figures, 2 tables
title: Vergleich der Knochenstruktur von Psoriasis Arthritis und Psoriasis Patienten – Eine HR-pQCT Studie über anabole und katabole Knochenveränderungen
Creators: name: Simon, David
name: Faustini, Francesca
name: Englbrecht, Matthias
name: Kleyer, Arnd
name: Kocijan, Roland
name: Haschka, Judith
name: Figueiredo, Camille
name: Kraus, Sebastian
name: Hueber, Axel
name: Sticherling, Michael
name: Schett, Georg
name: Rech, Jürgen
Publisher: name: German Medical Science GMS Publishing House
Year: 2015
Subjects: subject: 610 Medical sciences; Medicine

description: Einleitung: Bei der Psoriasis-Arthritis (PsA) zeigen sich sowohl Knochenerosionen als auch Proliferationen, wobei letztere auch bei Patienten mit Schuppenflechte (PSO) ohne Gelenksbeteiligung zu finden sind [ref:1]. In dieser Studie wurde die Knochenmikrostruktur von PSO-Patienten, ohne klinische[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 43. Kongress der Deutschen Gesellschaft für Rheumatologie (DGRh); 29. Jahrestagung der Deutschen Gesellschaft für Orthopädische Rheumatologie (DGORh); 25. wissenschaftliche Jahrestagung der Gesellschaft für Kinder- und Jugendrheumatologie (GKJR)
Magnetic Moments of Octet Baryons in Hot and Dense Nuclear Matter
Creators: name: Singh, Harpreet
name: Kumar, Arvind
name: Dahiya, Harleen
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We have calculated the in-medium magnetic moments of octet baryons in the presence of hot and dense symmetric nuclear matter. Effective magnetic moments of baryons have been derived from medium modified quark masses within chiral SU(3) quark mean field model. Further, for better insight of medium modification of baryonic magnetic moments, we have considered the explicit contributions from the valence quarks, sea quarks as well as sea orbital angular momentum of sea quarks. These effects have been successful in giving the description of baryonic magnetic moments in vacuum. The magnetic moments of baryons are found to vary significantly as a function of density of nuclear medium.
description: Accepted for Publication in Chinese Physics C
Organización social y producción en una comunidad rural
Creators: name: Duran Periñan, Teresita
name: Gómez Ballestas, Mayiris
Publisher: name: Universidad de Cartagena
Year: 1986
Subjects: Desarrollo de la comunidad
Participación social

description: Tesis (Trabajador Social). -- Universidad de Cartagena. Facultad de Ciencias Sociales y Educación. Programa de Trabajo Social, 1986
description: El siguiente estudio tiene por objeto identificar las características socioeconomicas de las poblaciones de la zona sur del municipio de Marialabaja, que inciden en los bajos niveles de organización en la producción agrícola.
Nodeless superconductivity in the topological nodal-line semimetal CaSb2
Creators: name: Duan, Weiyin
name: Zhang, Jiawen
name: Kumar, Rohit
name: Su, Hang
name: Nie, Zhiyong
name: Chen, Ye
name: Cao, Chao
name: Song, Yu
name: Yuan, Huiqiu
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: CaSb2 is a topological nodal-line semimetal that becomes superconducting below 1.6 K, providing an ideal platform to investigate the interplay between topologically nontrivial electronic bands and superconductivity. In this work, we investigated the superconducting order parameter of CaSb2 by measuring its magnetic penetration depth change Δλ(T) down to 0.07 K, using a tunneling diode oscillator (TDO) based technique. Well inside the superconducting state, Δλ(T) shows an exponential activated behavior, and provides direct evidence for a nodeless superconducting gap. By analyzing the temperature dependence of the superfluid density and the electronic specific heat, we find both can be consistently described by a two-gap s-wave model, in line with the presence of multiple Fermi surfaces associated with distinct Sb sites in this compound. These results demonstrate fully-gapped superconductivity in CaSb2 and constrain the allowed pairing symmetry.
title: Ο εσωτερικός έλεγχος στη δημόσια διοίκηση
title: Internal audit in public administration
titleType: AlternativeTitle
Creators: name: Γεωργιοπούλου, Μαρία
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2023
Subjects: Εσωτερικός έλεγχος
Δημόσια διοίκηση
Διαχείριση κινδύνου
Εταιρική διακυβέρνηση
Αποτελεσματικότητα
Διαφάνεια

description: Ο κύριος σκοπός της παρούσας εργασίας είναι να παρέχει μια ολοκληρωμένη αποτίμηση της συμβολής του Εσωτερικού Ελέγχου στην Ελληνική Δημόσια Διοίκηση. Συγκεκριμένα, η μελέτη αυτή προσδοκά να αναδείξει τις σημαντικές και θετικές επιπτώσεις του Εσωτερικού Ελέγχου στον εκσυγχρονισμό της Δημόσιας Διοίκησης. Ισχυρά μέτρα, που θα συνδράμουν στη βελτίωση της αποτελεσματικότητας, της αποδοτικότητας και της ακεραιότητας στη Δημόσια Διοίκηση, είναι αναγκαία προκειμένου να ενεργοποιηθεί ένα συνολικό σύστημα αναμόρφωσης, το οποίο θα οδηγήσει σε μια ευρύτερη μεταρρύθμιση της Δημόσιας Διοίκησης. Υπό το πρίσμα αυτό, ο ρόλος του Εσωτερικού Ελέγχου είναι καταλυτικός. Ο αποτελεσματικός Εσωτερικός Έλεγχος μπορεί να βελτιώσει την οικονομική και διαχειριστική ικανότητα των Οργανισμών, και να περιορίσει συνακόλουθα δημοσιονομικές συμπεριφορές που πιθανόν να καταλήξουν σε κακοδιαχείριση και διαφθορά. Το εύθραυστο οικονομικό περιβάλλον των τελευταίων δεκαετιών, επιτάσσει αυξημένη εστίαση στο ρόλο του Εσωτερικού Ελέγχου στη χρηστή διακυβέρνηση της Δημόσιας Διοίκησης, η οποία όλο και περισσότερο απαιτεί από τον Εσωτερικό Έλεγχο, να της παρέχει διασφάλιση της ποιότητας των δικών της δραστηριοτήτων. Ο Εσωτερικός Έλεγχος μπορεί να εξαλείψει την αδυναμία των διοικούντων να επιβλέπουν και να ελέγχουν όλες τις δραστηριότητες της οργάνωσης, να αποτρέψει άμεσα τις εσφαλμένες διαδικασίες, και να συνεισφέρει αποτελεσματικά στη λήψη ορθών αποφάσεων και στην υλοποίηση των στρατηγικών στόχων των Οργανισμών.
title: Vergleich von Fluoreszenzlebensdauern der Retina von Patienten mit nicht-proliferativer diabetischer Retinopathie und einer Kontrollgruppe
Creators: name: Schmidt, J.
name: Peters, S.
name: Sauer, L.
name: Augsten, R.
name: Müller, N.
name: Hammer, M.
Publisher: name: German Medical Science GMS Publishing House
Year: 2015
Subjects: subject: 610 Medical sciences; Medicine

description: Hintergrund: Die diabetische Retinopathie gilt weltweit als eine der Hauptursachen für Erblindung, weshalb eine frühe Erkennung der Erkrankung von besonderem Interesse ist. Mithilfe der Fluorescence-lifetime-ophthalmoscopy (FLIO) ist es möglich, im Sinne einer funktionellen Bildgebung[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 23. Jahrestagung der Gesellschaft der Augenärzte Sachsen-Anhalts und Thüringens
Lattice dielectric properties of rutile $\mathrm{TiO}_2$: First-principles anharmonic self-consistent phonon study
Creators: name: Amano, Tomohito
name: Yamazaki, Tamio
name: Akashi, Ryosuke
name: Tadano, Terumasa
name: Tsuneyuki, Shinji
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We calculate the lattice dielectric function of strongly anharmonic rutile $\mathrm{TiO}_2$ from ab initio anharmonic lattice dynamics methods. Since an accurate calculation of the $Γ$ point phonons is essential for determining optical properties, we employ the modified self-consistent approach, including third-order anharmonicity as well as fourth-order anharmonicity. The resulting optical phonon frequencies and linewidths at the $Γ$ point much better agree with experimental measurements than those from a perturbative approach. We show that the four-phonon scattering process contributes as much as the third-order anharmonic term to phonon linewidths. Furthermore, incorporating the frequency dependence of phonon linewidth reveals that experimentally known but unidentified peaks of the dielectric function are due to two-phonon process. This work emphasizes the importance of a self-consistent approach in predicting the optical properties of highly anharmonic materials.
description: 12 pages, 10 figures
The Importance And Affordability Of Integrated Communication Network In Ethiopian Defense Force
Creators: name: Tikue, Negassi
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: Military communications involve different actors and technologies that facilitate the effectiveness and efficiency of the army command and control system. The integrated communication network (ICN) is one of the recent global communication technologies which different countries are currently using. Conversely, the FDRE Ministry of National Defense Force couldn't introduce such centralized network system. Thus, this study was intended to describe the importance and affordability of the integrated communication network by a mixed research design or approach with descriptive methodology. Hence, 160 defense communication staffs and higher officials targeted as a study population and 114 sample respondents computed by Solvin's formula and structured in to two groups that account 70 technical staff and 36 higher officials and 8 key informants purposively selected to collect data by semi structured interview and open and closed ended questionnaire and substantiated with document analysis. The data analyzed in both quantitative and qualitative manner. The findings were; there are various challenges of the existing network system; there are better understandings on benefits of the ICN over its costs; comparatively ICN is better in its technique, mission and costs and stakeholders are willing to accept it. Based on the major findings it is concluded that, the integrated communication network is important and affordable to the Ethiopian National Defense Force. The network infrastructure found to be a leased line for current program and for the future it will be an independent network. The study also recommended that further cost benefit analysis or financial analysis on the Integrated Communication Network more important to show the affordability.
Evaluación de las condiciones de salud y trabajo de los trabajadores de la empresa Reeves Wire line Service LTD
Creators: name: Curvelo Rodríguez, Carlos Alberto
name: Pinto Suarez, Enrique Camilo
Publisher: name: Universidad de Cartagena
Year: 2004
Subjects: Salud ocupacional - Investigaciones

description: Tesis (Especialista en Salud Ocupacional) -- Universidad de Cartagena. Facultad de enfermería, 2004
description: Con el presente trabajo, los proponentes quieren hacer una contribución en Salud Ocupacional a la empresa REEVES, y por consiguiente a la calidad de vida de sus trabajadores, revisando exhaustivamente el PSO y su Planeación Estratégica y proponiendo oportunidades de mejoramiento que le permita llevar a cabo sus procesos con un control sobre los factores de riesgos y los aspectos e impactos ambientales.
title: Rezidive nach Protonentherapie, wo liegen die Risikofaktoren?
Creators: name: Seibel, I.
name: Cordini, D.
name: Rehak, M.
name: Hager, A.
name: Riechardt, A.I.
name: Heufelder, J.
name: Gollrad, J.
name: Joussen, A.M.
Publisher: name: German Medical Science GMS Publishing House
Year: 2015
Subjects: subject: 610 Medical sciences; Medicine

description: Die Protonentherapie hat eine lokale Tumorkontrolle von 96,4% beim Aderhautmelanom erreicht. Die verbleibenden 3,6 % sind die Gruppe, mit der sich die folgende Auswertung beschäftigt. Methoden: Es wurden alle Patienten eingeschlossen, die zwischen 1998 und 2008 bei Aderhaut/ziliarkörpermelanom[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 23. Jahrestagung der Gesellschaft der Augenärzte Sachsen-Anhalts und Thüringens
Far-Ultraviolet to Near-Infrared Spectroscopy of A Nearby Hydrogen Poor Superluminous Supernova Gaia16apd
Creators: name: Yan, Lin
name: Quimby, R.
name: Gal-Yam, A.
name: Brown, P.
name: Blagorodnova, N.
name: Ofek, E. O.
name: Lunnan, R.
name: Cooke, J.
name: Cenko, S. B.
name: Jencson, J.
name: Kasliwal, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report the first maximum-light far-Ultraviolet to near-infrared spectra (1000A - 1.62um, rest) of a H-poor superluminous supernova, Gaia16apd. At z=0.1018, it is one of the closest and the UV brightest such events, with 17.4 (AB) magnitude in Swift UV band (1928A) at -11days pre-maximum. Assuming an exponential form, we derived the rise time of 33days and the peak bolometric luminosity of 3x10^{44}ergs^-1. At maximum light, the estimated photospheric temperature and velocity are 17,000K and 14,000kms^-1 respectively. The inferred radiative and kinetic energy are roughly 1x10^{51} and 2x10^{52}erg. Gaia16apd is extremely UV luminous, emitting 50% of its total luminosity at 1000 - 2500A. Compared to the UV spectra (normalized at 3100A) of well studied SN1992A (Ia), SN2011fe(Ia), SN1999em (IIP) and SN1993J (IIb), it has orders of magnitude more far-UV emission. This excess is interpreted primarily as a result of weaker metal line blanketing due to much lower abundance of iron-group elements in the outer ejecta. Because these elements originate either from the natal metallicity of the star, or have been newly produced, our observation provides direct evidence that little of these freshly synthesized material, including 56Ni, was mixed into the outer ejecta, and the progenitor metallicity is likely sub-solar. This disfavors Pair-Instability Supernova (PISN) models with Helium core masses >=90Msun, where substantial 56Ni material is produced. Higher photospheric temperature of Gaia16apd than that of normal SNe may also contribute to the observed far-UV excess. We find some indication that UV luminous SLSNe-I like Gaia16apd could be common. Using the UV spectra, we show that WFIRST could detect SLSNe-I out to redshift of 8.
description: 19 pages. Match with the version accepted in ApJ
Explosive nucleosynthesis with fast neutrino-flavor conversion in core-collapse supernovae
Creators: name: Fujimoto, Shin-ichiro
name: Nagakura, Hiroki
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Fast neutrino-flavor conversion (FFC) is a possible game-changing ingredient in core-collapse supernova (CCSN) theory. In this paper, we examine the impact of FFC on explosive nucleosynthesis by including the effects of FFC in conjunction with asymmetric neutrino emission into nucleosynthetic computations in a parametric way. We find that the ejecta compositions are not appreciably affected by FFC for elements lighter than Co, while the compositions are influenced by FFC for the heavier elements. We also find that the role of FFC varies depending on the asymmetric degree of neutrino emission ($m_{\rm asy}$) and the degree of neutrino-flavor mixing. The impact of FFC is not monotonic to $m_{\rm asy}$; The change in the ejecta composition increases for higher $m_{\rm asy}$ up to $\sim 10\%$ compared with that without FFC, whereas FFC has little effect on the nucleosynthesis in very large asymmetric neutrino emission ($\gtrsim 30 \%$). Our results suggest that FFC facilitates the production of neutron-rich ejecta in most cases, although it makes the ejecta more proton-rich if anti-neutrino conversion is more vigorous than that of neutrino. The key ingredient accounting for this trend is neutrino absorption, whose effects on nucleosynthesis can be quantified by simple diagnostics.
description: 7 pages, 6 figures, accepted for the publication in MNRAS
Análisis socio-económico de la oferta competitiva en las empresas turísticas de la ciudad de Cartagena
Creators: name: Calvo, Luis Fernando
name: Barragan, Jose Antonio
Publisher: name: Universidad de Cartagena
Year: 1994
Subjects: Oferta turística
Turismo
Desarrollo económico

description: Tesis (Economista) -- Universidad de Cartagena. Facultad de Ciencias Económicas. Programa de Economía, 1994.
description: El Presente estudio tiene por objeto analizar la incidencia de los factores socio-económicos en la oferta competitiva de las empresas turísticas de cartagena.
title: Vergleich der Behandlungsergebnisse von 704 Patienten mit malignem Aderhautmelanom therapiert mittels Ruthenium-Brachytherapie versus Protonenbestrahlung
Creators: name: Rehak, M.
name: Cordini, D.
name: Joussen, A.M.
Publisher: name: German Medical Science GMS Publishing House
Year: 2015
Subjects: subject: 610 Medical sciences; Medicine

description: Ziel: In einer retrospektiven Auswertung evaluierten wir die Therapieergebnisse bei Patienten mit Aderhautmelanom, die entweder mittels Ruthenium-Applikator oder einer Protonenbestrahlung an der Augenklinik Charite, zwischen 1998 und 2007 behandelt wurden. Methodik: Bei insgesamt 704 Patienten von[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 23. Jahrestagung der Gesellschaft der Augenärzte Sachsen-Anhalts und Thüringens
Production of Bioplastic from Corn Starch and Sugarcane Bagasse
Creators: name: Mosisa, Gadissa
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: There is an increasing need for biodegradable plastics because they are environmentally friendly and can replace petroleum-based non-degradable plastics which pollute the environment. Recently huge efforts are exerted in substitution of petroleum based polymers by biodegradable ecofriendly composites because of the toxic effect of the synthetic polymers. Petroleum base polymers are not sustainable as they depend on depleting fossils. This work studies the effect of bagasse (sugarcane byproduct) fiber weight fraction on starch based composite. This study also investigated the potentials of starch and sugar cane cellulose fiber for bioplastic productions. The effect of oven drying and starch-cellulose fiber ratio was also studied. The experimental design was employed using design expert 6.0.8 two factor three level central composite designs (CCD) including five replicates at the center point of optimization study requiring 13 experiments on the 3 responses were analyzed namely tensile strength, water absorption and elongation at break. Results have shown that the addition of cellulose fiber (5 wt%, 10 wt% and 15 wt%) to selected gram of corn starch(5g), the value obtained were for tensile strength (13.27MPa, 24.45MPa and 22.18MPa, respectively), water absorption (36.90, 23.6 and 24.01% respectively) and elongation at break (20.25, 5.268 and 9.58% respectively), these values are the averages of replication treatment. From the analysis of experimental results the maximum and minimum value of tensile strength (26.81 and 11.55MPa), water absorption (39.02% and 20.45%) and elongation at break (25.99% and 4.32%) was obtained respectively. Starch-derived bioplastic reinforced with cellulose fiber at the optimal point of the responses namely tensile strength, water absorption and elongation at break, which are biodegradable, have been prepared and characterized for FTIR, compound microscope, Transparency, solubility, and density. Results obtained under optimal condition were found that Transparency of reinforced bioplastic reduced by 5% with respect to the control. Also its solubility decreased from (14.78% to 10.17%) while density was increased from (1.059g/ml to1.069g/ml). Evidence of the existence of strong interactions between the starch matrix and the cellulose fibers was revealed from detailed Fourier Transform Infra-red (FTIR) and compound microscopic evaluation.
The role of cellular lipids in HIV-1 replication.
Creators: name: Hawkes, David
Publisher: name: Monash University
Year: 2017
Subjects: Uncategorized

description: The role of cellular lipids in human immunodeficiency virus type-1 (HIV-1) replication is well established. There is also a large body of evidence that indicates that HIV-1 utilizes lipid rafts at the plasma membrane for viral entry, assembly and budding. HIV-1 is enriched in cholesterol and sphingomyelin which are two of the major lipid components of lipid rafts, and a specific subset (Brij98) of lipid rafts have been isolated from HIV-1 virions. Virion associated cholesterol and sphingomyelin have also been shown to be critical for HIV-1 replication, but the precise timing and mechanism remains unclear. A number of studies have investigated the contribution of different lipid classes to the HIV¬1 lipid composition, and recent advances in lipid mass spectrometry have allowed a more in depth analysis of the specific lipid species, not just classes, involved. This thesis provides the first study of the effects of viral genome, production method and producer cell on the phospholipid (specifically the lipid raft associated sphingomyelin and non-raft phosphatidylcholine) species distribution. These observations suggest that HIV-1 packages a relatively conserved subset of phospholipid species regardless of producer cell or viral genome. There is evidence to suggest that virion-associated sphingomyelin and phosphatidylcholine are important for HIV-1 infectivity. This thesis determined that sphingomyelin is required for both viral entry and infectivity. However, a reduction in virion associated phosphatidylcholine levels did not affect either entry or infectivity of HIV-1. These findings are in agreement with other studies which have shown that the lipid raft component sphingomyelin plays a role in the early stages of HIV-1 cell-cell fusion. While the stage of HIV-1 replication for which cell-derived cholesterol is required is currently undefined, it has generally been suggested that it is required for the very early stages of HIV-1 replication such as binding and fusion/entry into target cells. This thesis provides the first information that virion associated cholesterol is not required for HIV-1 viral entry but is required for a stage of replication prior to the completion of reverse transcription. In conclusion this thesis has demonstrated that virion-associated lipids play key, but different, roles in the early stages of HIV-1 infection. Data presented here show that the virion associated lipid (raft) components of HIV-1 are critical for both fusion/entry and for additional stage(s) post entry but prior to the completion of reverse transcription, possibly mediated through viral induced cellular signaling.
Evaluación del proceso de admisión del Hospital Universitario del Caribe en la ciudad de Cartagena en el período comprendido entre el 1° de Agosto del 2009 al 31 de Julio de 2010
Creators: name: Gutierrez De Piñeres, Jaililie Martha
name: Martínez Anillo, Vilma
Publisher: name: Universidad de Cartagena
Year: 2010
Subjects: Clima organizacional
Procesos de admisión - Evaluación
Hospital Universitario del Caribe - Proceso de admisión
Evaluación - Hospital Universitario del Caribe - Cartagena - Bolívar

description: Monografía (Especialista en Gestión de la Calidad y Auditoria en Salud).--Universidad de Cartagena. Facultad de Ciencias Económicas. Departamento de Postgrados, 2010
description: El presente estudio tiene por objeto identificar los factores que afectan el funcionamiento del proceso de admisión, cuáles son sus causas y sus repercusiones de tipo económico y asistencial en el Hospital Universitario del Caribe de la ciudad de Cartagena, en el periodo comprendido entre el 1° de agosto de 2009 al 31 de Julio 2010.
Surface State of Inter-orbital Pairing State in Sr$_2$RuO$_4$ Superconductor
Creators: name: Ando, Satoshi
name: Ikegaya, Satoshi
name: Tamura, Shun
name: Tanaka, Yukio
name: Yada, Keiji
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study the (001) surface state of a recently proposed $E_g$ symmetry inter-orbital-odd spin-triplet s-wave superconducting (SC) state in Sr$_2$RuO$_4$ (SRO). We confirm that this pair potential is transformed into a chiral $d$-wave pair potential and a pseudo-Zeeman field in the band basis for a low-energy range. Due to the chiral $d$-wave pair potential, the surface states appear near zero energy in the momentum range enclosed by the nodal lines of the chiral d-wave pair potential for each band at the (001) surface. Nevertheless, the pseudo-Zeeman field gives band splitting of the surface states, and its splitting energy is much smaller than the SC energy gap. The local density of states (LDOS) at the (001) surface of the SC state has a pronounced peak structure at zero energy due to the surface states near zero energy when the order of the resolution is lower than the splitting energy. This peak structure is robust under perturbations, such as an orbital Rashba coupling or an $E_u$ SC pair potential at the surface.
description: 19pages, 9figures
Bogdan Mielnik, geometry and quanta
Creators: name: Bengtsson, Ingemar
name: Zyczkowski, Karol
Publisher: name: arXiv
Year: 2022
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We review selected achievements of the late Bogdan Mielnik in the field of theoretical physics, with an emphasis on his attempts to go beyond quantum mechanics. Some of his original views on the problems of contemporary society and organization of science are also recalled.
description: 7 pages, 3 figures
Conformers and Clusters: A Spectroscopic Study of Intra-and-Intermolecular Hydrogen Bonding
Creators: name: Robertson, Patrick A.
Publisher: name: La Trobe
Year: 2023

description: Submission note: This thesis is submitted in complete fulfilment of the requirement for the degree of Doctor of Philosophy to the Department of Chemistry and Physics, School of Molecular Science, College of Science, Health and Engineering, La Trobe University, Bundoora.
De las fuentes del derecho del trabajo
Creators: name: López Mora, Faustino
Publisher: name: Universidad de Cartagena
Year: 1974
Subjects: Legislación laboral - Colombia

description: Tesis (Abogado) -- Universidad de Cartagena. Facultad de Derecho y Ciencias Políticas. Programa de Derecho, 1974
description: Estudio de todas y cada una de las instituciones y principios relacionados con la actividad laboral, cuya aplicación y aceptación de esta materia en cada una de las legislaciones, han adquirido las fuentes en el campo interno o nacional como en el externo o internacional.
Gate-Tuned Thermoelectric Power in Black Phosphorus
Creators: name: Saito, Yu
name: Iizuka, Takahiko
name: Koretsune, Takashi
name: Shimizu, Ryotaro Arita Sunao
name: Iwasa, Yoshihiro
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The electric field effect is a useful means of elucidating intrinsic material properties as well as for designing functional devices. The electric-double-layer transistor (EDLT) enables the control of carrier density in a wide range, which is recently proved to be an effective tool for the investigation of thermoelectric properties. Here, we report the gate-tuning of thermoelectric power in a black phosphorus (BP) single crystal flake with the thickness of 40 nm. Using an EDLT configuration, we successfully control the thermoelectric power (S), and find that the S of ion-gated BP reached +510 $μ$V/K at 210 K in the hole depleted state, which is much higher than the reported bulk single crystal value of +340 $μ$V/K at 300 K. We compared this experimental data with the first-principles-based calculation and found that this enhancement is qualitatively explained by the effective thinning of the conduction channel of the BP flake and non-uniformity of the channel owing to the gate operation in a depletion mode. Our results provide new opportunities for further engineering BP as a thermoelectric material in nanoscale.
description: 17 pages, 4 figures
Models of $J/Ψ$ photo-production reactions on the nucleon
Creators: name: Lee, T. -S. H.
name: Sakinah, S.
name: Oh, Yongseok
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The $J/Ψ$ photo-production reactions on the nucleon can provide information on the roles of gluons in determining the $J/Ψ$-nucleon ($J/Ψ$-N) interactions and the structure of the nucleon. The information on the $J/Ψ$-N interactions is needed to test lattice QCD (LQCD) calculations and to understand the nucleon resonances such as $N^*(P_c)$ recently reported by the LHCb Collaboration. In addition, it is also needed to investigate the production of nuclei with hidden charms and to extract the gluon distributions in nuclei. The main purpose of this article is to review six reaction models of $γ+ p \rightarrow J/Ψ+p$ reactions which have been and can be applied to analyze the data from Thomas Jefferson National Accelerator Facility (JLab). The formulae for each model are given and used to obtain the results to show the extent to which the available data can be described. The models presented include the Pomeron-exchange model of Donnachie and Landshoff (Pom-DL) and its extensions to include $J/Ψ$-N potentials extracted from LQCD (Pom-pot) and to also use the constituent quark model (CQM) to account for the quark substructure of $J/Ψ$ (Pom-CQM). The other three models are developed from applying the perturbative QCD approach to calculate the two-gluon exchange using the generalized parton distribution (GPD) of the nucleon (GPD-based), two- and three-gluon exchanges using the parton distribution of the nucleon ($2g+3g$), and the exchanges of scalar ($0^{++}$) and tensor ($2^{++}$) glueballs within the holographic formulation (holog). The results of investigating the excitation of the nucleon resonances $N^*(P_c)$ in the $γ+ p \rightarrow J/Ψ+p$ reactions are also given.
description: 26 pages
Twist Two Operator Approach for Even Spin Glueball Masses and Pomeron Regge Trajectory from the Hardwall Model
Creators: name: Rodrigues, Diego M.
name: Capossoli, Eduardo Folco
name: Boschi-Filho, Henrique
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We compute the masses of even spin glueball states $ J^{PC} $, with $ P=C=+1 $, using a twist two operator from an AdS/QCD model known as the hardwall model, using Dirichlet and Neumann boundary conditions. Within this approach, we found that the glueball masses are comparable with those in literature. From these masses, we obtained the Pomeron Regge trajectories for both boundary conditions in agreement with experimental data available and other holographic models.
description: V.2: 15 pages, 2 tables, 2 figures. Text improved. New references included. Typos corrected. Results unchanged. To appear in PRD
Evaluación hidrológica e hidráulica de la cuenca hidrográfica del arroyo Policarpa para el control de inundaciones
Creators: name: Del Castillo, Luís Carlos
name: Ortíz, María Alejandra
name: Moreno Egel, Dalia (Director)
Publisher: name: Universidad de Cartagena
Year: 2014
Subjects: Control de inundaciones
Embalses
Estudio Hidrologico

description: Tesis(Ingeniero Civil).-Universidad de Cartagena. Facultad de Ciencias E Ingenierías.Programa de Ingeniería Civil,2014
description: El Arroyo Policarpa se ubica en la Zona Industrial de Mamonal en la ciudad de Cartagena, Colombia y además, a lo largo de su cauce, baña el barrio que lleva su mismo nombre, por tanto, cualquier desbordamiento y posterior inundación trae consecuencias realmente graves. Este estudio tuvo como objetivo analizar hidrológica e hidráulicamente la cuenca del Arroyo Policarpa, con el fin de establecer las causas de los desbordamientos e inundaciones en la zona, y de acuerdo a estas, plantear alternativas de solución que varían desde la ampliación de las secciones transversales del canal hasta la construcción de un embalse. La investigación se dividió en dos componentes, un análisis hidrometeorológico y uno hidráulico, y por consiguiente, una comparación final que conllevó a la ubicación de los puntos críticos del canal. En la parte hidrometeorológica, se encontró que el caudal máximo que recorre el arroyo para un período de retorno de 50 años (escogido en este proyecto), fue de 22.2 m3/s. Por otro lado, se calculó la capacidad hidráulica de 19 secciones del canal y se encontró que muchas de estas secciones no tenían las dimensiones suficientes para transportar el caudal antes mencionado, hecho que corroboró el riesgo constante de inundación existente en la cuenca del Arroyo Policarpa y zonas aledañas. Por último, luego de analizar las alternativas ya nombradas, en este proyecto se planteó como solución más adecuada, debido a factores de espacio y sumada a la imposibilidad de ampliar secciones en algunos sectores, es la construcción de un embalse de 3,5 ha y un ancho de vertedero de 2 m y altura de 2,5 m que amortiguará el caudal hasta 7,7 m3/s, lo que equivale al 34,6% del caudal inicial
Maximizing the Validity of the Gaussian Approximation for the biphoton State from Parametric Downconversion
Creators: name: Baghdasaryan, Baghdasar
name: Steinlechner, Fabian
name: Fritzsche, Stephan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Spontaneous parametric down-conversion (SPDC) is widely used in quantum applications based on photonic entanglement. The efficiency of photon pair generation is often characterized by means of a $sinc(LΔk/2)$-function, where $L$ is the length of the nonlinear medium and $Δk$ the phase mismatch between the pump and down-converted fields. In theoretical investigations, the \textit{sinc} behavior of the phase mismatch has often been approximated by a Gaussian function $\exp{(-αx^2)}$ in order to derive analytical expressions for the SPDC process. Different values have been chosen in the literature for the optimization factor $α$, for instance by comparing the widths of \textit{sinc} and Gaussian functions or the momentum of down-converted photons. As a consequence, different values for $α$ provide different theoretical predictions for the same setup. Therefore, an informed and unique choice of this parameter is necessary. In this work, we present a choice of $α$ which maximizes the validity of the Gaussian approximation. Moreover, we also discuss the so-called \textit{super}-Gaussian and \textit{cosine}-Gaussian approximations as practical alternatives with improved predictive power for experiments.