cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Synthese und biologische Evaluierung Sterolmodifizierter Hedgehog-Signalpeptide und Proteine
Creators: name: Peters, Carsten
Publisher: name: Universität Dortmund
Year: 2003
Subjects: subject: Hedgehog
subject: Signaltransduktion
subject: Proteine
subject: Lipidierte Proteine
subject: 540

description: The Hedghog (Hh) family of signalling molecules are key players in patterning numerous types of tissues. Mutations in Hh and its downstream signalling molecules are also associated with numerous oncogenic and disease states. The Hh family of molecules are secreted proteins that undergo several post-translational modifications gaining full activity. Hh molecules undergo a maturation process in which they autocatalytically cleave, generating an N-terminal polypeptide (Hh-Np) containing all the signalling functions, and a C-terminal polypeptide appearing to have no function than catalysing the autoproteolytic cleavage. During this cleavage process, a cholesterol moiety is attached covalently via an ester function to the C-terminal glycine of the signalling domain. Furthermore the hydrophobicity of the protein is increase by the addition of an palmitic acid residue to the cysteine immediately following the peptide cleavage site. To evaluate membrane binding properties of cholesterol, different sterol modified peptides were synthesized by means of solid phase peptide chemistry. With these peptide membrane binding properties were examined in vitro using fluorescence spectroscopy. To mimic the situation in vivo constructs that consist of truncated N-Ras protein and sterol modified peptides were generated by MIC-ligation. With these constructs membrane binding properties of different sterol modified proteins were determined in vivo and in vitro.
Konzeptuelles Begriffsverständnis von Lehramtsstudierenden in der Linearen Algebra
Creators: name: Schlarmann, Kathrin
Publisher: name: Gesellschaft für Didaktik der Mathematik
Year: 2012
Subjects: subject: 510

description: Die Lineare Algebra als streng formalisierte, abstrakte Theorie bereitet vielen Studierenden Schwierigkeiten. Im Rahmen einer qualitativen Untersuchung mittels klinischer Interviews wurde das Begriffsverständnis von Lehramtsstudierenden, die das Modul Lineare Algebra erfolgreich bestanden haben, analysiert. Es zeigten sich Verständnisprobleme zum Thema Basis.
$L^p$-$L^q$ decay estimates for dissipative linear hyperbolic systems in 1D
Creators: name: Mascia, Corrado
name: Nguyen, Thinh Tien
Publisher: name: arXiv
Year: 2016
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35L45, 35C20

description: Given $A,B\in M_n(\mathbb R)$, we consider the Cauchy problem for partially dissipative hyperbolic systems having the form \begin{equation*} \partial_{t}u+A\partial_{x}u+Bu=0, \end{equation*} with the aim of providing a detailed description of the large-time behavior. Sharp $L^p$-$L^q$ estimates are established for the distance between the solution to the system and a time-asymptotic profile, where the profile is the superposition of diffusion waves and exponentially decaying waves.
description: Refined version
Taeniophyllum multiflorum Kocyan & Schuit. 2013, comb. nov.
Creators: name: Kocyan, Alexander
name: Schuiteman, André
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Orchidaceae
Taeniophyllum
Taeniophyllum multiflorum

description: Taeniophyllum multiflorum (Ridl.) Kocyan & Schuit., comb. nov.
 Basionym: Microtatorchis multiflora Ridley (1916: 205).
 Heterotypic synonyms: Microtatorchis longissima Mansfeld (1929: 465); Microtatorchis wilhelminae Royen (1979: 789).
description: Published as part of Kocyan, Alexander & Schuiteman, André, 2014, New combinations in Aeridinae (Orchidaceae), pp. 61-85 in Phytotaxa 161 (1) on page 73, DOI: 10.11646/phytotaxa.161.1.3, http://zenodo.org/record/5128794
Monocrepidius mithiensis Hoffmannova & Packova & Prosvirov & Akhter & Kundrata 2023, comb. nov.
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
Monocrepidius
Monocrepidius mithiensis

description: Monocrepidius mithiensis (Platia & Ahmed, 2016), comb. nov.
Conoderus mithiensis Platia & Ahmed, 2016: 7.
Conoderus methiensis: Mangi et al., 2020a: 2091 [unavailable name, incorrect subsequent spelling not in prevailing usage].
Conderus [sic!] methinesis: Mangi et al., 2020a: 2091 [unavailable name, incorrect subsequent spelling not in prevailing usage].
Distribution. Pakistan (Platia & Ahmed 2016).
Literature. Platia & Ahmed (2016: 7): original description, figures of male habitus, pronotum and genitalia; Mangi et al. (2020a: 2091): remark [as Conoderus methiensis [sic!] and Conderus [sic!] methinesis [sic!]]; Mangi et al. (2022: 197): identification key, distribution, comparison with other species.
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 298, DOI: 10.11646/zootaxa.5270.2.6, http://zenodo.org/record/7864780
Estudio de prefactibilidad del drenaje de los sectores la Nueva victoria 1 y 2da etapa, la Esmeralda y Sueños del Futuro
Creators: name: Lobelo, Josè
name: Porto, Joaquin
Publisher: name: Universidad de Cartagena
Year: 2000
Subjects: Drenaje

description: Tesis (Ingeniero Civil). -Universidad de Cartagena. Facultad de Ciencias E Ingeniería. Programa de Ingeniería Civil. 2000.
description: El presente trabajo tiene por objeto realizar los estudios de prefactibilidad necesarios para el diseño de la canalización u otro tipo de solución hidráulica del arroyo calicanto en el sector correspondiente a los barrios La Nueva Victoria primera y segunda etapa, la Esperanza, la Esmeralda, y Sueños del Futuro como solución para los problemas de desbordamiento en épocas de lluvias.
Review of the First Fraunhofer Life Science Symposium on Cell Therapy and Immunology
Creators: name: Barthel, Henryk
name: Boltze, Johannes
name: Faber, Sonya
name: Hengstler, Jan G.
name: Linke, Axel
Publisher: name: Technische Universität Dortmund
Year: 2006
Subjects: subject: 610

description: This report covers recent advances in Regenerative Medicine with a special focus on (i) imaging of regeneration, (ii) nanotechnology and tissue engineering, (iii) immunological cell tolerance, (iv) cell therapies in cardiovascular, neurodegenerative, and liver diseases and in spinal regeneration.
description: EXCLI Journal ; Vol. 5, 2006
A magnetohydrodynamic model for multi-wavelength flares from Sagittarius~A$^\star$ (I): model and the near-infrared and X-ray flares
Creators: name: Li, Ya-Ping
name: Yuan, Feng
name: Wang, Q. Daniel
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Flares from the supermassive black hole in our Galaxy, Sagittarius~A$^\star$ (Sgr A$^\star$), are routinely observed over the last decade or so. Despite numerous observational and theoretical efforts, the nature of such flares still remains poorly understood, although a few phenomenological scenarios have been proposed. In this work, we develop the Yuan et al. (2009) scenario into a magnetohydrodynamic (MHD) model for Sgr A$^\star$ flares. This model is analogous with the theory of solar flares and coronal mass ejection in solar physics. In the model, magnetic field loops emerge from the accretion flow onto Sgr A$^\star$ and are twisted to form flux ropes because of shear and turbulence. The magnetic energy is also accumulated in this process until a threshold is reached. This then results in a catastrophic evolution of a flux rope with the help of magnetic reconnection in the current sheet. In this catastrophic process, the magnetic energy is partially converted into the energy of non-thermal electrons. We have quantitatively calculated the dynamical evolution of the height, size, and velocity of the flux rope, as well as the magnetic field in the flare regions, and the energy distribution of relativistic electrons in this process. We further calculate the synchrotron radiation from these electrons and compare the obtained light curves with the observed ones. We find that the model can reasonably explain the main observations of near-infrared (NIR) and X-ray flares including their light curves and spectra. It can also potentially explain the frequency-dependent time delay seen in radio flare light curves.
description: 17 pages, 13 figures, accepted by MNRAS
Taeniophyllum muriculatum Kocyan & Schuit. 2013, comb. nov.
Creators: name: Kocyan, Alexander
name: Schuiteman, André
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Orchidaceae
Taeniophyllum
Taeniophyllum muriculatum

description: Taeniophyllum muriculatum (Schltr.) Kocyan & Schuit., comb. nov.
 Basionym: Microtatorchis muriculata Schlechter (1913: 1002).
description: Published as part of Kocyan, Alexander & Schuiteman, André, 2014, New combinations in Aeridinae (Orchidaceae), pp. 61-85 in Phytotaxa 161 (1) on page 73, DOI: 10.11646/phytotaxa.161.1.3, http://zenodo.org/record/5128794
Einsatz von Entwurfsmustern bei der Entwicklung eines föderierten Krankenhausinformationssystems mit CORBA
Creators: name: Hasselbring, Wilhelm
name: Ziesche, Peter
Publisher: name: Universität Dortmund
Year: 2002
Subjects: subject: 004

description: Verteilte Krankenhausinformationssysteme sind komplexe Systeme von Systemen, die eine flexible Software-Architektur benötigen. Im vorliegenden Beitrag präsentieren wir die Architektur eines föderierten Krankenhausinformationssystems und berichten über unsere Erfahrungen mit dem Einsatz von Entwurfsmustern für die Strukturierung und Programmierung der CORBA-basierten Kommunikationsschnittstelle für dieses System.
description: Internes Memorandum des Lehrstuhls für Software-Technologie / Fachbereich Informatik, Universität Dortmund ; 92
Taeniophyllum musciforme Kocyan & Schuit. 2013, comb. nov.
Creators: name: Kocyan, Alexander
name: Schuiteman, André
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Orchidaceae
Taeniophyllum
Taeniophyllum musciforme

description: Taeniophyllum musciforme (Schltr.) Kocyan & Schuit., comb. nov.
 Basionym: Microtatorchis musciformis Schlechter (1913: 1002).
description: Published as part of Kocyan, Alexander & Schuiteman, André, 2014, New combinations in Aeridinae (Orchidaceae), pp. 61-85 in Phytotaxa 161 (1) on page 73, DOI: 10.11646/phytotaxa.161.1.3, http://zenodo.org/record/5128794
Algunos aspectos económicos y recursos naturales de la Costa Atlántica Colombiana
Creators: name: Ramos Austin, Roque Ivan
name: Polo Torres, Juan De Dios
Publisher: name: Universidad de Cartagena
Year: 1986
Subjects: Recursos naturales - Costa Altantica Colombiana - Aspectos económicos

description: Tesis (Economista).--Universidad de Cartagena. Facultad de Ciencias Económicas. Programa de Economía, 1986.
description: El presente estudio tiene por objeto describir las principales actividades económicas de la costa Atlántica, específicamente en lo relacionado con sus recursos naturales renovables y no renovables que poseemos, que son los encargados de estabilizar la vida económica de la costa Atlántica.
title: Beratung einer kleinen Kommunalverwaltung
title: das Beispiel der Stadtverwaltung Hattingen
titleType: AlternativeTitle
Creators: name: Wilkesmann, Uwe
Publisher: name: Lucius & Lucius Verlagsgesellschaft
Year: 2000
Subjects: subject: 300
subject: 650

description: Arbeit
Sistema de integración de mecanismos de seguimiento y monitoreo de datos sintomáticos de salud
Creators: name: Rodríguez Medina, Edwin
name: Wilches Olivo, Alvaro
Publisher: name: Universidad de Cartagena
Year: 2011
Subjects: Sistemas de integración - Monitoreo
Mecanismos de seguimiento - Datos sintomáticos
Salud - Monitoreo - Mecanismos de seguimiento

description: Tesis (Ingeniero de Sistemas).--Universidad de Cartagena. Facultad de Ciencias E Ingenierías. Programa de Ingeniería de Sistemas, 2011
description: El presente estudio tiene por objeto modelar un sistema de integración de mecanismos de seguimiento y monitoreo de datos sintomáticos de salud que permita configurar y ejecutar la verificación, interpretación, análisis y evaluación de dichos datos, con la finalidad de informar al Sistema de Información General de las entidades promotoras de salud correspondiente.
title: Zwischen Erwerbsarbeit und Eigenarbeit
title: Ein Beitrag zur Debatte um die Arbeitsgesellschaft
titleType: AlternativeTitle
title: Between layed work and one's own work. A contribution to the debate on occupational society
titleType: AlternativeTitle
Creators: name: Bonß, Wolfgang
Publisher: name: Lucius & Lucius Verlagsgesellschaft
Year: 2011
Subjects: subject: future of work
subject: one's own work
subject: paid work
subject: work
subject: 300
subject: 650

description: Der Beitrag steht im Kontext der soziologischen Debatte um Arbeitsgesellschaft und Zukunft der Arbeit; sein Thema ist die sich verändernde Bedeutung der Arbeit als Vergesellschaftungsinstanz. Hierbei wird zunächst nachgezeichnet, wie die ursprünglich negativ bewertete Arbeit mit dem Übergang zur Moderne positiviert und in Gestalt der Erwerbsarbeit zu einer zentralen Vergesellschaf-tungsinstanz avanciert. Am Beispiel Deutschlands werden dann empirische Befunde zur Entwicklung von Erwerbsbeteiligung, Arbeitsformen und Strukturwandel der Normalarbeit präsentiert, die z.T. für eine veränderte Relevanz der Erwerbsarbeit im 21. Jahrhundert sprechen. Angesichts des Wandels der Produktionsstruktur, des sich verändernden Erwerbsarbeitsvolumens, der Flexibilisierung der Arbeits-organisation und der veränderten Einstellung zur Erwerbsarbeit so die abschließende These spricht zwar nichts für ein Ende der Arbeitsgesellschaft, aber viel für eine Relativierung der Erwerbsarbeit bei gleichzeitiger Aufwertung anderer Arbeitsformen.
description: The subject of the article is the changing relevance of work to socialization and social integration. In pre-modern times work had no positive relevance to socialization, but was perceived negatively. This opinion did not change until the 18th century. Only in modern societies work and labour have a central relevance to socialization. Against this background the author presents different data to the the development of participation in work (especially sex-specific participation), of part-time-labour and of the structural change of occcupation in Germany. These data indicate a new role of work and especially of payed work in modern societies in the 21th century. Modern societies will remain working societies. But there are changes in the capacities of payed work, in the structures of production and in the organisation of labour, and there is every indication, that the future of work will develop beyond the traditional contrast of payed and unpayed labour.
description: Arbeit
Taeniophyllum occultans Kocyan & Schuit. 2013, comb. nov.
Creators: name: Kocyan, Alexander
name: Schuiteman, André
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Orchidaceae
Taeniophyllum
Taeniophyllum occultans

description: Taeniophyllum occultans (Schuit. & de Vogel) Kocyan & Schuit., comb. nov.
 Microtatorchis occultans Schuiteman & de Vogel (2012 (publ. 2011): 11).
description: Published as part of Kocyan, Alexander & Schuiteman, André, 2014, New combinations in Aeridinae (Orchidaceae), pp. 61-85 in Phytotaxa 161 (1) on page 73, DOI: 10.11646/phytotaxa.161.1.3, http://zenodo.org/record/5128794
"Influencia religiosa en las instituciones jurídicas"
Creators: name: Camacho Piñeres, Eduardo Ramón
Publisher: name: Universidad de Cartagena
Year: 1973
Subjects: Religión y derecho

description: Tesis (Abogado) -- Universidad de Cartagena. Facultad de Derecho y Ciencias Políticas. Programa de Derecho, 1973
description: Buscar una interpretación a los movimientos y a las realidades socio-económicas de nuestra época, porque el proceso histórico es en medio de su polifonía – uno solo, y solo observan desde cierta distancia la convergencia de sus diferentes elementos.
Manifold Approximation by Moving Least-Squares Projection (MMLS)
Creators: name: Sober, Barak
name: Levin, David
Publisher: name: arXiv
Year: 2016
Subjects: subject: Graphics (cs.GR)
subject: Machine Learning (cs.LG)
subject: Differential Geometry (math.DG)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: In order to avoid the curse of dimensionality, frequently encountered in Big Data analysis, there was a vast development in the field of linear and nonlinear dimension reduction techniques in recent years. These techniques (sometimes referred to as manifold learning) assume that the scattered input data is lying on a lower dimensional manifold, thus the high dimensionality problem can be overcome by learning the lower dimensionality behavior. However, in real life applications, data is often very noisy. In this work, we propose a method to approximate $\mathcal{M}$ a $d$-dimensional $C^{m+1}$ smooth submanifold of $\mathbb{R}^n$ ($d \ll n$) based upon noisy scattered data points (i.e., a data cloud). We assume that the data points are located "near" the lower dimensional manifold and suggest a non-linear moving least-squares projection on an approximating $d$-dimensional manifold. Under some mild assumptions, the resulting approximant is shown to be infinitely smooth and of high approximation order (i.e., $O(h^{m+1})$, where $h$ is the fill distance and $m$ is the degree of the local polynomial approximation). The method presented here assumes no analytic knowledge of the approximated manifold and the approximation algorithm is linear in the large dimension $n$. Furthermore, the approximating manifold can serve as a framework to perform operations directly on the high dimensional data in a computationally efficient manner. This way, the preparatory step of dimension reduction, which induces distortions to the data, can be avoided altogether.
Problemática de financiación de la microempresa en Cartagena
Creators: name: Alvarez, Gladys
name: Esquivel, Erick
Publisher: name: Universidad de Cartagena
Year: 1998
Subjects: Pequeña Industria
Financiamiento
Microempresas

description: Tesis (Administrador de Empresas) .--Universidad de Cartagena. Facultad de Ciencias Económicas. Programa de Administración de Empresas,1998
description: El presente estudio tiene por objeto determinar si la dificultad de acceso al crédito, en el sector microempresarial de la ciudad de Cartagena, es uno de los factores básicos que impide su desarrollo.
Analysing parameter space correlations of recent 13 TeV gluino and squark searches in the pMSSM
Creators: name: Barr, Alan
name: Liu, Jesse
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: This paper examines unexplored correlations in the parameter spaces probed by recent ATLAS analyses for gluinos and squarks, addressing various shortcomings in the literature. Six 13 TeV ATLAS analyses based on 3.2 fb$^{-1}$ of integrated luminosity are interpreted in the 19-parameter R-parity conserving phenomenological minimal supersymmetric extension to the Standard Model (pMSSM). The distinct regions covered by each search are independent of prior, and we reveal particularly striking complementarity between the 2-6 jets and Multi-b searches. In the leptonic searches, we identify better sensitivity to models than those used for analysis optimisation, notably a squark-slepton-wino scenario for the SS/3L search. Further, we show how collider searches for coloured states probe the structure of the pMSSM dark sector more extensively than the Monojet analysis alone, with sensitivity to parameter spaces that are challenging for direct detection experiments.
description: 27 pages, 15 figures, published version, parts of arXiv:1605.09502 were added to publication
Taeniophyllum oreophilum Kocyan & Schuit. 2013, comb. nov.
Creators: name: Kocyan, Alexander
name: Schuiteman, André
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Orchidaceae
Taeniophyllum
Taeniophyllum oreophilum

description: Taeniophyllum oreophilum (Schltr.) Kocyan & Schuit., comb. nov.
 Basionym: Microtatorchis oreophila Schlechter (1906a: 89).
 Heterotypic synonym: Taeniophyllum balansae Kraenzlin (1928: 142).
description: Published as part of Kocyan, Alexander & Schuiteman, André, 2014, New combinations in Aeridinae (Orchidaceae), pp. 61-85 in Phytotaxa 161 (1) on page 73, DOI: 10.11646/phytotaxa.161.1.3, http://zenodo.org/record/5128794
Estudio de prefactibilidad para establecer un sistema de reciclaje de basuras en la fuente, en los sectores de Manga y Pie de la Popa
Creators: name: Geney Montes, Paola
name: Herrera Guerra, Carmen
name: Muñoz Mendoza, Hernando
Publisher: name: Universidad de Cartagena
Year: 1996
Subjects: Saneamiento ambiental
Basuras y aprovechamiento de residuos
Productos de residuos

description: Tesis (Ingeniero Civil).--Universidad de Cartagena. Facultad de Ciencias E Ingeniería. Programa de Ingeniería Civil, 1996.
description: El presente estudio tiene por objeto establecer un sistema de separación, almacenamiento de las basuras orgánicas e inorgánicas en la fuente, para facilitar su recolección, transporte y disposición, contribuyendo así, con el saneamiento ambiental, mejoramiento del entorno de los sectores de manga y pie de la popa de ciudad de cartagena.
Amtliche Mitteilungen der Technischen Universität Dortmund Nr. 01/2011
Creators: name: (:Unkn) Unknown
Publisher: name: Technische Universität Dortmund
Year: 2011
Subjects: subject: 080

description: 1. Ordnung zur Änderung der Prüfungsordnung für den Master-Studiengang Journalistik der Fakultät Kulturwissenschaften der Technischen Universität Dortmund vom 28. Januar 2011
description: 2. Ordnung zur Änderung der Prüfungsordnung für die Bachelorstudiengänge Bioingenieurwesen und Chemieingenieurwesen der Fakultät Bio- und Chemieingenieurwesen der Technischen Universität Dortmund vom 20. Januar 2011
description: Verwaltungsanweisung des Kanzlers über den Vollzug von Rechtsvorschriften des Arbeitsschutzes und des Umweltschutzes in der Technischen Universität Dortmund vom 18. Januar 2011
description: Amtliche Mitteilungen der Technischen Universität Dortmund ; 1, 2011
An Improved Method to Measure the Cosmic Curvature
Creators: name: Wei, Jun-Jie
name: Wu, Xue-Feng
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper, we propose an improved model-independent method to constrain the cosmic curvature by combining the most recent Hubble parameter $H(z)$ and supernovae Ia (SNe Ia) data. Based on the $H(z)$ data, we first use the model-independent smoothing technique, Gaussian processes, to construct distance modulus $μ_{H}(z)$, which is susceptible to the cosmic curvature parameter $Ω_{k}$. In contrary to previous studies, the light-curve fitting parameters, which account for distance estimation of SN ($μ_{SN}(z)$), are set free to investigate whether $Ω_{k}$ has a dependence on them. By comparing $μ_{H}(z)$ to $μ_{SN}(z)$, we put limits on $Ω_{k}$. Our results confirm that $Ω_{k}$ is independent of the SN light-curve parameters. Moreover, we show that the measured $Ω_{k}$ is in good agreement with zero cosmic curvature, implying that there is no significant deviation from a flat Universe at the current observational data level. We also test the influence of different $H(z)$ samples and different Hubble constant $H_{0}$ values, finding that different $H(z)$ samples do not present significant impact on the constraints. However, different $H_{0}$ priors can affect the constraints of $Ω_{k}$ in some degree. The prior of $H_{0}=73.24\pm1.74$ km $\rm s^{-1}$ $\rm Mpc^{-1}$ gives a value of $Ω_{k}$ a little bit above $1σ$ confidence level away from 0, but $H_{0}=69.6\pm0.7$ km $\rm s^{-1}$ $\rm Mpc^{-1}$ gives it below $1σ$.
description: 9 pages, 5 figures, 2 tables. Accepted for publication in ApJ
Taeniophyllum papillosum Kocyan & Schuit. 2013, comb.nov.
Creators: name: Kocyan, Alexander
name: Schuiteman, André
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Orchidaceae
Taeniophyllum
Taeniophyllum papillosum

description: Taeniophyllum papillosum (J.J.Sm.) Kocyan & Schuit., comb.nov.
 Basionym: Microtatorchis papillosa Smith (1918: 117).
description: Published as part of Kocyan, Alexander & Schuiteman, André, 2014, New combinations in Aeridinae (Orchidaceae), pp. 61-85 in Phytotaxa 161 (1) on page 73, DOI: 10.11646/phytotaxa.161.1.3, http://zenodo.org/record/5128794
Spectropolarimetry of the Type IIb SN 2008aq
Creators: name: Stevance, H. F.
name: Maund, J. R.
name: Baade, D.
name: Hoflich, P.
name: Patat, F.
name: Spyromilio, J.
name: Wheeler, J. C.
name: Clocchiatti, A.
name: Wang, L.
name: Yang, Y.
name: Zelaya, P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present optical spectroscopy and spectropolarimetry of the Type IIb SN 2008aq 16 days and 27 days post-explosion. The spectrum of SN 2008aq remained dominated by Halpha P Cygni profile at both epochs, but showed a significant increase in the strength of the helium features, which is characteristic of the transition undergone by supernovae between Type IIb and Type Ib. Comparison of the spectra of SN 2008aq to other Type IIb SNe (SN 1993J, SN 2011dh, and SN 2008ax) at similar epochs revealed that the helium lines in SN 2008aq are much weaker, suggesting that its progenitor was stripped to a lesser degree. SN 2008aq also showed significant levels of continuum polarisation at p_cont = 0.70 (+/- 0.22) % in the first epoch, increasing to p_cont = 1.21 (+/- 0.33) % by the second epoch. Moreover, the presence of loops in the q-u planes of Halpha and He I in the second epoch suggests a departure from axial symmetry.
description: 7 pages, 6 figures, Accepted for publication in MNRAS - Erratum Added
Taeniophyllum platyrhachis Kocyan & Schuit. 2013, comb. nov.
Creators: name: Kocyan, Alexander
name: Schuiteman, André
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Orchidaceae
Taeniophyllum
Taeniophyllum platyrhachis

description: Taeniophyllum platyrhachis (Schltr.) Kocyan & Schuit., comb. nov.
 Basionym: Microtatorchis platyrhachis Schlechter (1913: 1000).
description: Published as part of Kocyan, Alexander & Schuiteman, André, 2014, New combinations in Aeridinae (Orchidaceae), pp. 61-85 in Phytotaxa 161 (1) on page 73, DOI: 10.11646/phytotaxa.161.1.3, http://zenodo.org/record/5128794
Producción de la flor de anturio en la Sierra Nevada de Santa Marta y su comercialización en la Costa Atlántica colombiana
Creators: name: Rincón Choles, Jairo Enrique
name: Vergara Alvarez, Bernaris Del C
Publisher: name: Universidad de Cartagena
Year: 1992
Subjects: Canales de distribución
Mercadeo
Canales de comercialización

description: Tesis (Administrador de Empresas) -- Universidad de Cartagena. Facultad de Ciencias Económicas. Programa de Administración de Empresas. 1992
description: El presente estudio tiene por objeto determinar si es viable en el corto, mediano y largo plazo, de acuerdo con la infraestructura montada por la empresa inversiones Zoca Ltda, la producción de la flor anturio en la Sierra Nevada de Santamarta, y su comercialización en la Costa Atlántica colombiana.
Symmetries of linearized gravity from adjoint operators
Creators: name: Aksteiner, Steffen
name: Bäckdahl, Thomas
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 83C60, 83C57, 58J70, 35Q61, 35Q76

description: Based on operator identities and their formal adjoints, we derive two symmetry operators for the linearized Einstein operator on vacuum backgrounds of Petrov type D and in particular the Kerr spacetime. One of them is of differential order four and coincides with a result of Cohen and Kegeles. The other one is a new operator of differential order six. The corresponding operator identities are based on the Teukolsky equation and the Teukolsky-Starobinski identities, respectively. The method applies to other field equations as well, which is illustrated with the Maxwell equation. The resulting symmetry operators are connected to Hertz and Debye potentials as well as to the separability of the Teukolsky equation for both Maxwell and linearized gravity.
description: 16 pages
title: Κρυπτοοικονομία - θεωρία και εφαρμογές
Creators: name: Κωνσταντινιδου Ευρυκλεια
Publisher: name: Technical University of Crete
Year: 2024

description: Χρήμα είναι το ιδιαίτερο εμπόρευμα που εκπληρώνει το ρόλο του γενικού ισοδύναμου, δηλαδή του εμπορεύματος που εκφράζει την αξία όλων των άλλων εμπορευμάτων και μέσω του οποίου γίνονται οι ανταλλαγές τους. Κατά την οργάνωση των ανθρώπων σε κοινωνίες, από το στάδιο των ανταλλαγών, άρχισε να εμφανίζεται το χρήμα με τη μορφή διάφορων εμπορευμάτων που αποκτούσαν χαρακτήρα γενικού ισοδύναμου. Στην εξελικτική πορεία της κοινωνίας, για λόγους διευκόλυνσης αλλά και φυσικής σύστασης, άρχισαν να καθιερώνονται ως γενικό ισοδύναμο πολύτιμα μέταλλα, όπως το ασήμι ή ο χρυσός. Στη συνέχεια, θεσμοί όπως ναοί και ιερείς εμφανίζονται ως μεσολαβητές των ανταλλαγών, σημαίνοντας τις απαρχές των τραπεζικών ιδρυμάτων. Τον 20ό αιώνα τα χαρτονομίσματα αντικατέστησαν την κυκλοφορία χρυσού, διατηρώντας τον όμως σαν γενικό ισοδύναμο, αφού η αξία των χαρτονομισμάτων καταδεικνύονταν από τα αποθέματα χρυσού. Οι χώρες ανέπτυξαν το δικό τους χρήμα, ή εθνικό νόμισμα, το οποίο αντιστοιχίζεται σε διεθνές συνάλλαγμα προκειμένου να πραγματοποιούνται οι ανταλλαγές. Πλέον, τα χαρτονομίσματα δεν αντιστοιχίζονται με  αποθέματα χρυσού.
Το κρυπτονόμισμα, εμφανίζεται ως μια ψηφιακή μορφή χρήματος, που υπάρχει μόνο ως ψηφιακό αποτύπωμα και όχι σε φυσική μορφή. Η υπόστασή του συνδέεται με τα μαθηματικά της κρυπτογραφίας. Μέσω πολύπλοκων υπολογισμών καθορίζεται το σύνολο των μονάδων, αλλά και το πώς και πότε δημιουργούνται μονάδες του νομίσματος. Η εξέλιξη της τεχνολογίας μπορεί να εγγυηθεί υψηλή ασφάλεια στη διεκπεραίωση των συναλλαγών. Η λειτουργία των κρυπτονομισμάτων, βασίζεται στην τεχνολογία blockchain. Είναι μια αλυσίδα μπλοκ, που περιέχουν κρυπτογραφημένες ψηφιακές συναλλαγές. Περιγράφεται ως ένα κατανεμημένο καθολικό (λογιστικό φύλλο), το οποίο υπόκειται σε δημόσια διαχείριση από τους χρήστες. Οι ίδιοι οι χρήστες επικυρώνουν και διασφαλίζουν τις πραγματοποιούμενες συναλλαγές, με τη χρήση υπολογιστικών συστημάτων. Οι έννοιες των αλυσίδων των μπλοκ και των κατανεμημένων καθολικών συναντώνται και παλαιότερα σε αστικές συναλλαγές ιδιοκτησίας, όπως ακίνητης περιουσίας. Η σύνδεση , όμως, αυτών των δύο εννοιών σε ένα (συνήθως) ασφαλές υπολογιστικό σύστημα, που θα μπορούσε να χρησιμοποιηθεί για την επίλυση πολλών πρακτικών προβλημάτων σημαίνει μια νέα εποχή.
Στην παρούσα εργασία, επιχειρείται μια ανάλυση του τρόπου λειτουργίας των κρυπτονομισμάτων, της τεχνολογίας blockchain, του θεσμικού πλαισίου στο οποίο πραγματοποιούνται οι ανταλλαγές, του επιπέδου ασφάλειας κατά τη χρήση τους, καθώς και μια πρόβλεψη για την εξέλιξη της τεχνολογίας αυτής. Επιχειρείται ακόμη, η εφαρμογή της γνώσης, με τη δημιουργία ενός κρυπτονομίσματος, (coin & token) με σκοπό τη βαθύτερη κατανόηση της λειτουργίας και χρήσης τους ως μέσο ανταλλαγής.
Análisis en componentes principales con una aplicación al plan básico de ordenamiento territorial en el Municipio de Turbaco
Creators: name: Martinez Buendia, Juan Miguel
Publisher: name: Universidad de Cartagena
Year: 2000
Subjects: Urbanismo
Planificación regional - Historia - Colombia

description: Tesis (Matemático). -- Universidad de Cartagena. Facultad de Ciencias Exactas y Naturales. Programa de Matemáticas, 2000
description: El presente estudio tiene por objeto presentar mediante argumentos matemáticos, las bases teóricas del análisis del componente principales (ACP) el cual se deriva del análisis factorial y se erige como una técnica amplia mente difundida y reconocida en el gran océano de la investigación.
Conservation laws and integral relations for the Boussinesq equation
Creators: name: Ankiewicz, Adrian
name: Bassom, Andrew P.
name: Clarkson, Peter A.
name: Dowie, Ellen
Publisher: name: arXiv
Year: 2016
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We are concerned with conservation laws and integral relations associated with rational solutions of the Boussinesq equation, a soliton equation solvable by inverse scattering which was first introduced by Boussinesq in 1871. The rational solutions are logarithmic derivatives of a polynomial, are algebraically decaying and have a similar appearance to rogue-wave solutions of the focusing nonlinear Schrödinger equation. For these rational solutions the constants of motion associated with the conserved quantities are zero and they have some interesting integral relations which depend on the total degree of the associated polynomial.
description: 17 pages, 5 figues. arXiv admin note: text overlap with arXiv:1609.00503
La responsabilidad civil y el contrato de seguro
Creators: name: Romero Moreno, Miguel Antonio
Publisher: name: Universidad de Cartagena
Year: 2001
Subjects: Responsabilidad civil
Seguro de responsabilidad civil
Contratos

description: Tesis (Abogado) -- Universidad de Cartagena. Facultad de Derecho y Ciencias Políticas. Programa de Derecho, 2001
description: El contrato de seguro es el más regulado dentro del titulo IV del código del comercio, el cual permite que se realice un análisis de cada una de las normas, siendo este El seguro un contrato consensual, bilateral, oneroso, oleatorio y de ejecución sucesiva. Tratando tópicos como las generalidades del contrato, el siniestro en los seguros de responsabilidad civil, las clausulas Claims Made, seguros contractuales y de responsabilidad civil extracontractual.
Persuasion with Limited Communication
Creators: name: Dughmi, Shaddin
name: Kempe, David
name: Qiang, Ruixin
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: FOS: Computer and information sciences

description: We examine information structure design, also called "persuasion" or "signaling", in the presence of a constraint on the amount of communication. We focus on the fundamental setting of bilateral trade, which in its simplest form involves a seller with a single item to price, a buyer whose value for the item is drawn from a common prior distribution over $n$ different possible values, and a take-it-or-leave-it-offer protocol. A mediator with access to the buyer's type may partially reveal such information to the seller in order to further some objective such as the social welfare or the seller's revenue. In the setting of maximizing welfare under bilateral trade, we show that $O(\log(n) \log \frac{1}ε)$ signals suffice for a $1-ε$ approximation to the optimal welfare, and this bound is tight. As our main result, we exhibit an efficient algorithm for computing a $\frac{M-1}{M} \cdot (1-1/e)$-approximation to the welfare-maximizing scheme with at most M signals. For the revenue objective, we show that $Ω(n)$ signals are needed for a constant factor approximation to the revenue of a fully informed seller. From a computational perspective, however, the problem gets easier: we show that a simple dynamic program computes the signaling scheme with M signals maximizing the seller's revenue. Observing that the signaling problem in bilateral trade is a special case of the fundamental Bayesian Persuasion model of Kamenica and Gentzkow, we also examine the question of communication-constrained signaling more generally. In this model there is a sender (the mediator), a receiver (the seller) looking to take an action (setting the price), and a state of nature (the buyer's type) drawn from a common prior. We show that it is NP-hard to approximate the optimal sender's utility to within any constant factor in the presence of communication constraints.
description: EC16
Taeniophyllum podochiloides Kocyan & Schuit. 2013, comb. nov.
Creators: name: Kocyan, Alexander
name: Schuiteman, André
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Orchidaceae
Taeniophyllum
Taeniophyllum podochiloides

description: Taeniophyllum podochiloides (J.J.Sm.) Kocyan & Schuit., comb. nov.
 Basionym: Microtatorchis podochiloides Smith (1929: 501).
description: Published as part of Kocyan, Alexander & Schuiteman, André, 2014, New combinations in Aeridinae (Orchidaceae), pp. 61-85 in Phytotaxa 161 (1) on page 73, DOI: 10.11646/phytotaxa.161.1.3, http://zenodo.org/record/5128794
title: Suchen Sie noch oder lesen Sie schon?
title: v:scout - das dreidimensionale Raum-Informationssystem für Bibliotheken
titleType: AlternativeTitle
Creators: name: Mann, Maria
Publisher: name: Technische Universität Dortmund
Year: 2006
Subjects: subject: 000

description: Orientierung ist visuell erfahrbar! Ein Klick auf die Signatur der Medieneinheit - und dem Nutzer öffnet sich eine dreidimensionale Ansicht Ihrer Bibliothek. Grafisch ansprechend und übersichtlich visualisiert "v:scout" den Standort des gesuchten Objekts. Schnell und mühelos ist das Medium gefunden! Das Berliner Unternehmen arTec entwickelte das neuartige Raum-Informationssystem für Bibliotheken und Archive. Die Software ergänzt bestehende computergestützte Kataloge, wie z.B. den OPAC. Dabei begeistert der benutzerfreundliche Service in seiner Klarheit: intuitive Bedienung, modernste Anwendungsoberfläche, höchste Übersicht! "v:scout"... das innovative Raum-Informationssystem!
Monocrepidius vartiani Hoffmannova & Packova & Prosvirov & Akhter & Kundrata 2023, comb. nov.
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
Monocrepidius
Monocrepidius vartiani

description: Monocrepidius vartiani (Platia, 2015), comb. nov.
Conoderus vartiani Platia, 2015b: 14.
Distribution. Afghanistan, Pakistan (Platia 2015b, Platia & Ahmed 2016).
Literature. Platia & Ahmed (2016: 9): first record from Pakistan; Mangi et al. (2022: 197): identification key, distribution.
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 298, DOI: 10.11646/zootaxa.5270.2.6, http://zenodo.org/record/7864780
Practices And Challenges Of Managing Workforce Diversity: Case Of United Nation Economic Commission For Africa (UNECA)
Creators: name: Belayneh, Ebrahim
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: Advances in technology and the advent of a global economy bring the people of the world closer together than ever before. Given this fact, businesses, educational systems and other entities are investigating ways to better recruit their workforce by attracting and retaining the best and most qualified workers. The principal objective of this study was to assess the practical implementations of managing diversity and exploring the challenges and identify the opportunities that ECA has due to having diversified workforce. Because the area of diversity and diversity management is so broad, there was a need to focus mainly on the areas of three selected dimensions of diversity (gender, ethnicity and educational back ground) with the four identified best diversity management practices (Management commitment, Diversity Training, Employee Involvement and Recruitment &Selection). The methodological framework consisted of a combination of quantitative and qualitative research approach. The design which have been used in this study were exploratory and descriptive research design. Based on March 2018 HR data of the organization, out of 772 employees sample size of 234 non-supervisory employees and 137 supervisory level managers were selected for the study. Stratified sample design was used to determine the sample size from each strata based on the organographies of the case organization and simple random sampling method used to distribute the questionnaires in each strata. The sampling techniques that used in this study were both probability (simple random) and non-probability (purposive) sampling. Beside to this, secondary data has been used for crosschecking purpose. The Data collected through the questionnaire was analyzed statistically by using the Software Package for Social Science (SPSS) Ve.20. It was then summarized using frequency, mean and standard deviation. The major findings have been presented based on the objective of the study, there is less management commitment and some problems related with employee involvement are also found in ECA. And also there are some challenges in the process of managing diversity like: the presence of insufficient career advancement program. Experience sharing and effective communications were the opportunities which have not been used by the organization. The researcher recommended that the HR procedure needs some review related with how diversities are handle and should properly develop trainings under diversity issue.
Taeniophyllum pterophorum Kocyan & Schuit. 2013, comb. nov.
Creators: name: Kocyan, Alexander
name: Schuiteman, André
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Orchidaceae
Taeniophyllum
Taeniophyllum pterophorum

description: Taeniophyllum pterophorum (Schltr.) Kocyan & Schuit., comb. nov.
 Basionym: Microtatorchis pterophora Schlechter (1913: 1005).
description: Published as part of Kocyan, Alexander & Schuiteman, André, 2014, New combinations in Aeridinae (Orchidaceae), pp. 61-85 in Phytotaxa 161 (1) on page 73, DOI: 10.11646/phytotaxa.161.1.3, http://zenodo.org/record/5128794
Uniform continuity bounds for information characteristics of quantum channels depending on input dimension and on input energy
Creators: name: Shirokov, M. E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Information Theory (cs.IT)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We obtain continuity bounds for basic information characteristics of quantum channels depending on their input dimension (if it is finite) and on the input energy bound (if the input dimension is infinite). We pay a special attention to the case of a multi-mode quantum oscillator as an input system. First we prove continuity bounds for the output conditional mutual information for a single channel and for $n$ copies of a channel. Then we obtain estimates for variation of the output Holevo quantity with respect to simultaneous variations of a channel and of an input ensemble. As a result tight and close-to-tight continuity bounds for basic capacities of quantum channels depending on the input dimension are obtained. They complement the Leung-Smith continuity bounds depending on the output dimension. Finally, we obtain tight and close-to-tight continuity bounds for basic capacities of infinite-dimensional energy-constrained channels with respect to the energy-constrained Bures distance generating the strong convergence of quantum channels.
description: 34 pages, in v.2 we add specifications of all the results for the case of multi-mode quantum oscillator (as input system), in v.3 the diamond-norm topology on the set of channels is replaced by the strong (pointwise) convergence topology, in v.4 the continuity bounds for energy-constrained channel capacities are improved (made tight or close-to-tight), v.5 is the journal version. arXiv admin note: text overlap with arXiv:1604.00568
title: Die Messung von Vernetzung
title: Nutzungsstatistiken mit SFX
titleType: AlternativeTitle
Creators: name: Kreische, Joachim
Publisher: name: Technische Universität Dortmund
Year: 2006
Subjects: subject: 000

description: Die Nutzungsanalyse der von Bibliotheken angebotenen Datenbanken und Volltextangebote ist bisher nicht nur stark von den Datenlieferungen der Anbieter abhängig, sondern auch sehr statisch. Mit der Einführung von Linking Resolvern, die über Statistiktools verfügen, verbessern sich die Möglichkeiten der Nutzungsanalyse deutlich. Am Beispiel der Einführung des Linking Resolvers SFX an der ULB Düsseldorf sollen verschiedene Analysemöglichkeiten vorgestellt werden. Insbesondere die über den Linking Resolver hergestellte Verbindung von Rechercheinstrumenten und Volltexten lassen sich statistisch darstellen. In Kombination mit frei wählbaren Zeitachsen und der Auswahl IP-bezogener Nutzergruppen lassen sich mit dem Statistiktool in SFX unzählige Suchanfragen dynamisch generieren. Anhand der Daten aus Düsseldorf soll dargestellt werden, wie sehr Suchmaschinen, Open Access-Quellen und Bibliotheksangebote aufeinander bezogene und gemeinsam genutzte Angebote sind.
The Causes Of Project Delay: The Case Of Lideta Limate Primary School Building Project Lideta Sub City Administration Construction Office
Creators: name: Argaw, Tibebu
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: The objectives of this research was to identify the most common factors, effects and the way of elimination delay project of time overrun in Lideta Lemate primary school building construction projects of Lideta sub city administration. In order to achieve this objective, the researcher implemented literature review research methodology and questionnaire survey. Employing these methods, the significance of factors contributing to delay overruns within the projects of interest were identified and evaluated. The participants were selected from clients, contractors and consultants. A total of 36 questionnaires from client, consultants and contractors were collected. The agreement among the sets of rankings for delay overruns were tested using statistical methods. The statistical significant difference in the delay factors between the different groups of the project participants with the mean rank for each Create stress on contractors, disputes, total abandonment, time overrun, litigation and acceleration losses. The most effective measures of eliminating delays in construction were; information sharing, total quality management), quality cycles, benchmarking, joint risk management, continuous trainings, automated material tracking and early involvement of contractor and subcontractors. It is hoped that these findings will guide efforts to improve the performance of the construction industry in the future
Metáforas en matemáticas: Ecuaciones diferenciales
Creators: name: Sierra Ibáñez, Luis Francisco
Publisher: name: Universidad de Cartagena
Year: 2016
Subjects: Matemáticas y lenguaje - Investigaciones
Aproximación interdisciplinaria al conocimiento
Ecuaciones diferenciales - Investigaciones

description: Tesis (Matemático).-- Universidad de Cartagena. Facultad de Ciencias Exactas y Naturales. Programa de Matemáticas, 2016
description: El propósito de este trabajo es plantear la cuestión de la invención o el descubrimiento de la metáfora en las matemáticas, pero más preciso en las Ecuaciones diferenciales homogeneas de orden n. Para entender la metáfora en el tema mencionado se plantea la siguiente cuestión: Qué metáforas están presentes en la conceptualización de las Ecuaciones diferenciales lineales homogéneas con coeficientes constantes de orden n?