365 research outputs found
Diseño de un modelo basado en la teoría de colas para mejorar la calidad en la atención de la tienda Canepa, Cajamarca - 2020
No full textLa investigación “Diseño de un modelo basado en la teoría de colas para mejorar la calidad en la atención de la tienda Canepa, Cajamarca - 2020”, el objetivo diseñar un modelo basado en la teoría de colas para mejorar la calidad en la atención de la Tienda Mayorista Canepa, Cajamarca – 2020, estudio descriptivo de enfoque cuantitativo, con diseño pre experimental, de tipo aplicada. El diagnostico general realizado según el diagrama de Pareto identifica un 80% (75%) de las colas ocasionadas por la calidad de atención, identificadas según las causas y sub causas del diagrama de Ishikawa. Se realiza el análisis con el modelo M/M/s, para cuatro servidores, se tiene λ - λ = 14 clientes que se van del servicio; se utiliza el instrumento Servperf para medir la calidad de atención, con resultados deficientes de 41,7% en tangibilidad, una confiabilidad de 50%, capacidad de respuesta de 50%, y seguridad de 46,7%, se simula el modelo con un tiempo de 14 horas, por lo tanto se realiza la propuesta, se incrementa 2 servidores más, se simula el modelo viéndose reducido el tiempo de la capacidad de atención en 6.58 minutos, se realiza la evaluación económica, obteniéndose un VAN de S/ 160, 840.97, un TIR de 61% de rentabilidad anual para la Empresa Canepa, un IR de 2.62 favorable, por lo tanto se determina la viabilidad del estudio
Teoría de colas para disminuir tiempos de espera en el área de atención al cliente en la empresa E. P. S. SEDACAJ S. A.
No full textLa presente investigación se realizó a través de un análisis de indicadores del área de atención al cliente, independiente a los problemas de abastecimiento que; la cual se encuentra activa desde enero del año 2017. Dedicada a brindar servicio de abastecimiento de agua y alcantarillado en la cuidad de Cajamarca y alrededores, a modo de retribución monetaria por el servicio prestado es que encontramos el área de atención al cliente. Área en la cual, se presentaron ciertos problemas que afectan a la empresa y a los clientes; en especial, porque los servidores no abastecen la capacidad de la demanda; es decir, no hay ventanillas suficientes para brindar un servicio satisfactorio al usuario. Para determinar si las largas esperas o colas que se presentan impactan en la satisfacción del cliente, se ha aplicado teoría de colas, lo que ha permitido identificar las deficiencias que se presentan durante este sistema. Por ello, este proyecto tuvo como finalidad plantear soluciones aplicando teoría de colas en la E.P.S SEDACAJ S.A. con el objetivo de disminuir tiempos de espera, dando como resultado un promedio de tiempo de atención, 13.78 minutos, un promedio de 14 personas en cola y un tiempo promedio de espera, 142 minuto
Gorycz wina : o wierszu "Colas Breugnon" Jerzego Lieberta
No full textIn an interpretative essay devoted to a poem by Jerzy Liebert Colas Breugnon, the
author of the article searches for the signs of affirmation, which – as it seems – should
permeate into the poem by means of intertextual dialogue. Such a dialogue is held with
a famous novel by Romain Rolland, considered as a manifesto of life optimism. The
relation that seems to have conjoined these two texts is less obvious than one could
think. A figure of Colas Breugnon served Liebert not only to demonstrate the eulogy
of life in all its positive aspects but also to point to the hardships in one’s faith in God
that required from man the acceptance of also those experiences that are beyond the
delights of life
Cent ans de pratique associative : un point de vue juridique (IIe partie)
No full textSoulignant l’hétérogénéité du monde associatif, Colas Amblard s’interroge sur la pertinence du statut associatif pour accueillir des entreprises de l’économie sociale et sur l’opportunité de réformer la loi de 1901. L’auteur entreprend de spécifier ce qui réunit les associations : le droit associatif est une liberté publique, l’association est, juridiquement, un contrat et, enfin, l’évolution actuelle des pratiques associatives définit un véritable droit de l’entreprise associative. En s’appuyant sur la jurisprudence, l’administration a en effet produit une « doctrine des oeuvres » (1977) qui définit les conditions de la non-lucrativité. Plus récemment, l’évolution de la fiscalité a permis l’établissement d’un traitement différencié, qui résout, au moins en partie, les problèmes que l’essor de l’entreprise associative pose à la loi de 1901. La prise en compte du « mieux disant » social reste pour l’instant problématique.Emphasizing the diversity of the non-profit sector, Colas Amblard questions the relevance of the non-profit legal form for social-economy firms and whether it is time to revise the 1901 law governing associations. In attempting to identify what unites associations, the author observes that the right to form an association is a civil liberty, that an association is a legal contract and, lastly, that the current evolution of non-profit practice has produced a body of law on non-profit enterprises. Based on precedents, the government defined the requirements for qualifying as a non-profit organization in 1977. More recently, changes in taxation have made it possible to treat individual cases differently, which at least partially resolves the problems posed by the growth of non-profit enterprises with respect to the 1901 law. Taking into account social value-added remains for the moment problematic
The impact of social subordination on stress reactivity and cognitive abilities in CD-1 outbred mice
No full textImposed social subordination, such as that acquired through defeat or alienation, has been shown to negatively impact cognitive performance in both human and animal populations. In the present study we examined whether domain-specific and/or domain- general learning abilities (c.f. general intelligence) are differentially influenced by the imposition of social subordination. Further, we examined whether any observable differences in learning abilities were the direct result of subordination or if they represented deficits which are intrinsically expressed in individuals that are innately disposed to subordination. Subordinate and dominant behaviors were assessed in two groups of CD-1 male mice. In one group (IMP), social stratification occurred prior to the assessment of learning abilities, while in a second group (INN), this assessment occurred after learning abilities were measured. Domain-specific learning abilities were measured as performance on individual learning tasks while domain-general learning abilities were measured as the aggregate performance across a battery of learning tasks. We found that the imposition of subordination decreases exploratory tendencies and to some degree affects domain-specific learning performance. However, the most staggering results came in our analysis of general learning abilities whereby we observed that subjects who assumed a submissive role prior to the assessment of cognitive function were severely impaired. Similar decrements were not seen in subjects that were determined to be subordinate after learning had been assessed. The latter finding indicates that absent the imposition of subordination, individuals with subordinate tendencies do not demonstrate learning impairments. This observation could have important ramifications for those who suffer bullying in school or workplace settings.Ph.D.Includes bibliographical referencesIncludes vitaby Danielle C. Cola
Outils de diagnose structurelle et fonctionnelle pour la bioévaluation de la qualité des sédiments associés à la présence de barrages. Approche intégrée de la population au processus écosystémique
No full textSediment evaluation and monitoring is an essential part of ecosystem monitoring since sediments represent an important component of aquatic habitats and are also a potential source of contamination. Current methodologies of their ecotoxic risk assessment do not encompass ecosystemic responses and do not take into account multiple abiotic and biotic stressors. Run-of-river reservoirs entrap a large amount of sediments and constitute an opportunity to develop original risk assessment methodologies that integrate biological responses in situ and their potential effects for river ecosystem functioning. Six run-of-river reservoirs were selected to study the effects of sediment contamination at several spatial and biological scales, thanks to structural and functional approaches. Our results evidenced a selection in faunistic assemblages in response to contamination, associated with low taxonomic and functional diversity. Our results also evidenced sublethal responses, with niches shifts of invertebrate population and modification of biotic interactions. Sediment contamination has also impacted metabolic functional diversity of bacterial communities and fungal richness and biomass. These biocenotic alterations have resulted in disturbances in ecosystemic processes such as leaf breakdown and benthic flux at the water-sediment interface. Ecosystems downstream dams were also impacted, through resuspension of contaminated sediments, alteration of water quality and cascading effects related to structural and functional responses of reservoirs communities. Our findings evidenced challenges of the sediment quality preservation and the need to develop risk assessment methodologies based on the vulnerability at each biological scale in order to understand and elucidate ecological status and trajectories of aquatic ecosystemsA la fois témoins et acteurs de contamination, les sédiments constituent un élément essentiel des écosystèmes aquatiques qu'il convient de surveiller, évaluer et protéger. Les méthodes actuelles d'évaluation de leurs risques écotoxiques restent peu transférables aux écosystèmes, et ne rendent pas compte de la présence de multiples facteurs de stress abiotiques et biotiques. Les sédiments stockés par les seuils et barrages offrent l'opportunité de développer des méthodes originales de diagnose des réponses biologiques in situ. Six retenues au fil de l'eau dont les sédiments présentent un gradient de contamination métallique et organique ont été étudiées. Les effets de la contamination ont été explorés à différentes échelles spatiales et biologiques via des approches structurelles et fonctionnelles. Dans les retenues, en réponse à l'augmentation de la perturbation chimique, nos résultats montrent une sélection de cortèges faunistiques associée à une réduction de la diversité taxonomique et fonctionnelle. Des réponses sublétales des macroinvertébrés ont été identifiées, notamment sur les niches spatiales, les régimes alimentaires ou la compétition interspécifique. La contamination des sédiments impacte aussi le potentiel métabolique bactérien et la richesse et la biomasse fongique. L'ensemble de ces altérations biocénotiques se traduisent au niveau écosystémique par la rupture du processus de décomposition des litières et la modification des flux benthiques à l'interface eau-sédiment. Les écosystèmes en aval sont également perturbés via la remise en suspension des sédiments contaminés, l?altération de la qualité de l'eau et les effets en cascades des réponses structurelles et fonctionnelles des communautés des retenues. L'ensemble de nos résultats soulignent les enjeux de préservation de la qualité des sédiments et la nécessité de développer des méthodologies intégratives de la vulnérabilité à chaque niveau d'organisation biologique pour mieux appréhender l'état et les trajectoires écologiques des écosystèmes aquatique
Diagnosis tools for structural and functional bioassessment of sediment quality associated with the presence of dams : integrated approach from population to ecosystemic processes
No full textA la fois témoins et acteurs de contamination, les sédiments constituent un élément essentiel des écosystèmes aquatiques qu'il convient de surveiller, évaluer et protéger. Les méthodes actuelles d'évaluation de leurs risques écotoxiques restent peu transférables aux écosystèmes, et ne rendent pas compte de la présence de multiples facteurs de stress abiotiques et biotiques. Les sédiments stockés par les seuils et barrages offrent l'opportunité de développer des méthodes originales de diagnose des réponses biologiques in situ. Six retenues au fil de l'eau dont les sédiments présentent un gradient de contamination métallique et organique ont été étudiées. Les effets de la contamination ont été explorés à différentes échelles spatiales et biologiques via des approches structurelles et fonctionnelles. Dans les retenues, en réponse à l'augmentation de la perturbation chimique, nos résultats montrent une sélection de cortèges faunistiques associée à une réduction de la diversité taxonomique et fonctionnelle. Des réponses sublétales des macroinvertébrés ont été identifiées, notamment sur les niches spatiales, les régimes alimentaires ou la compétition interspécifique. La contamination des sédiments impacte aussi le potentiel métabolique bactérien et la richesse et la biomasse fongique. L'ensemble de ces altérations biocénotiques se traduisent au niveau écosystémique par la rupture du processus de décomposition des litières et la modification des flux benthiques à l'interface eau-sédiment. Les écosystèmes en aval sont également perturbés via la remise en suspension des sédiments contaminés, l?altération de la qualité de l'eau et les effets en cascades des réponses structurelles et fonctionnelles des communautés des retenues. L'ensemble de nos résultats soulignent les enjeux de préservation de la qualité des sédiments et la nécessité de développer des méthodologies intégratives de la vulnérabilité à chaque niveau d'organisation biologique pour mieux appréhender l'état et les trajectoires écologiques des écosystèmes aquatiquesSediment evaluation and monitoring is an essential part of ecosystem monitoring since sediments represent an important component of aquatic habitats and are also a potential source of contamination. Current methodologies of their ecotoxic risk assessment do not encompass ecosystemic responses and do not take into account multiple abiotic and biotic stressors. Run-of-river reservoirs entrap a large amount of sediments and constitute an opportunity to develop original risk assessment methodologies that integrate biological responses in situ and their potential effects for river ecosystem functioning. Six run-of-river reservoirs were selected to study the effects of sediment contamination at several spatial and biological scales, thanks to structural and functional approaches. Our results evidenced a selection in faunistic assemblages in response to contamination, associated with low taxonomic and functional diversity. Our results also evidenced sublethal responses, with niches shifts of invertebrate population and modification of biotic interactions. Sediment contamination has also impacted metabolic functional diversity of bacterial communities and fungal richness and biomass. These biocenotic alterations have resulted in disturbances in ecosystemic processes such as leaf breakdown and benthic flux at the water-sediment interface. Ecosystems downstream dams were also impacted, through resuspension of contaminated sediments, alteration of water quality and cascading effects related to structural and functional responses of reservoirs communities. Our findings evidenced challenges of the sediment quality preservation and the need to develop risk assessment methodologies based on the vulnerability at each biological scale in order to understand and elucidate ecological status and trajectories of aquatic ecosystem
On the interaction between the ion cyclotron resonance heating and scrape-off layer turbulence via coherent waves
No full textIt was reported on the ASDEX-Upgrade tokamak and recently confirmed on the Tore Supra tokamak (Antar 2010 et al Phys. Rev. Lett. 105 165001, Antar 2012 Nucl. Fusion 52 103005) that ion cyclotron resonance heating (ICRH) reduces turbulence in the scrape-off layer (SOL) by strongly affecting the large intermittent structures. In this paper, and for the first time, we show that ICRH, with a frequency at 57MHz, excites waves at frequencies about 1.7MHz as a consequence of parametric decay instability. This is reflected in the power spectra of the ion saturation signals, measured by fixed Langmuir probes acquired at 200MHz, as well as in the cross-correlation between two toroidally distanced probes and in the bicoherence spectra. The velocity and the wavenumber of this perturbation is determined indicating that they may be ion sound waves. Furthermore, it is shown that they are nonlinearly coupled to the turbulent fluctuations leading to the strong modification of the power spectrum and could provide explanations about the decrease in the level of turbulence in the SOL during ICRH. This aspect is reflected in the enhanced three-wave coupling between these waves and turbulence studied by applying the bispectral analysis. Turbulence appears thus to be affected when ICRH is applied by the intermediate of ion sound waves. © 2014 EURATOM.Antar G, 2010, PHYS REV LETT, V105, DOI 10.1103-PhysRevLett.105.165001; Antar GY, 2007, PHYS PLASMAS, V14, DOI 10.1063-1.2424886; Antar GY, 2003, PHYS PLASMAS, V10, P419, DOI 10.1063-1.1536166; Antar GY, 2001, PHYS PLASMAS, V8, P1612, DOI 10.1063-1.1363663; Antar GY, 2001, PHYS REV LETT, V87, DOI 10.1103-PhysRevLett.87.065001; Antar GY, 2012, NUCL FUSION, V52, DOI 10.1088-0029-5515-52-10-103005; Bobkov VV, 2010, NUCL FUSION, V50, DOI 10.1088-0029-5515-50-3-035004; BORA D, 1991, NUCL FUSION, V31, P2383, DOI 10.1088-0029-5515-31-12-010; BURES M, 1988, PLASMA PHYS CONTR F, V30, P149, DOI 10.1088-0741-3335-30-2-004; Colas L, 2007, J NUCL MATER, V363, P555, DOI 10.1016-j.jnucmat.2006.12.052; Colas L, 2007, PLASMA PHYS CONTR F, V49, pB35, DOI 10.1088-0741-3335-49-12B-S02; Cziegler I, 2012, PLASMA PHYS CONTR F, V54, DOI 10.1088-0741-3335-54-10-105019; Fenzi C, 2011, NUCL FUSION, V51, DOI 10.1088-0029-5515-51-10-103038; GALVAO RMO, 1994, PLASMA PHYS CONTR F, V36, P1679, DOI 10.1088-0741-3335-36-10-007; HASEGAWA A, 1977, PHYS REV LETT, V39, P205, DOI 10.1103-PhysRevLett.39.205; HEIKKINEN JA, 1989, NUCL FUSION, V29, P1307, DOI 10.1088-0029-5515-29-8-007; HOFMANN JV, 1990, FUSION ENG DES, V12, P185, DOI 10.1016-0920-3796(90)90078-K; Milligen B.P.V., 1995, PHYS REV LETT, V74, P395; MORISAKI T, 1995, PLASMA PHYS CONTR F, V37, P787, DOI 10.1088-0741-3335-37-7-008; Nieuwenhove R.V., 1989, J NUCL MATER, V162-164, P288; NOTERDAEME JM, 1993, PLASMA PHYS CONTR F, V35, P1481, DOI 10.1088-0741-3335-35-11-001; Oost G.V., 1990, FUSION ENG DES, V12, P149; PINSKER RI, 1992, AIP CONF PROC, V244, P105; RITZ CP, 1989, PHYS FLUIDS B-PLASMA, V1, P153, DOI 10.1063-1.859082; RITZ CP, 1986, PHYSICA D, V20, P320, DOI 10.1016-0167-2789(86)90036-9; SAMM U, 1987, PLASMA PHYS CONTR F, V29, P1321, DOI 10.1088-0741-3335-29-10A-313; STENZEL RL, 1988, PHYS REV LETT, V60, P704, DOI 10.1103-PhysRevLett.60.704; Stix T. H., 1992, WAVES PLASMAS; Tanaka T, 1996, NUCL FUSION, V36, P1609, DOI 10.1088-0029-5515-36-12-I02; VANNIEUWENHOVE R, 1988, NUCL FUSION, V28, P1603, DOI 10.1088-0029-5515-28-9-0090
Variability in greenhouse gas concentration in Petit-Saut reservoir (French Guyana)
No full textWe measured CO2 and CH4 concentrations and environmental data for 44 sites among the reservoir during the dry season in 2018. We compared the spatial variability in gas concentrations with the temporal variability measured at one signle site since impoudment (23 years ago). Temporal and spatial variability were related to environmental drivers and C sources
"Donde se descomponen las colas de los burros" de Carolina Vivas. La Antígona latinoamericana del siglo XXI: no es el dolor de una, es el dolor de todas.
No full textIn this article we will analyze the play Donde se descomponen las colas de los burros by the playwright Carolina Vivas, which can be read as a reception of the tragedy Antigone. In this sense, we are interested in presenting the transformation of the character and the argument in the Latin American context, to visualize how the previous appropriation of the classic text in the continent influences the work of the Colombian author and, at the same time, to highlight the elements of the tragedy that the author rescues and modifies. Also, we will present a trend of the various readings and receptions of Antigone, emphasizing those carried out in Latin America. We will analyze this elements to situate the place from where the rewriting of Carolina Vivas is located and presented as a piece that, due to the way in which it rewrites the plot and the figure of Antigone, is configured as a milestone in the already extensive tradition of receptions of the Sophoclean tragedy in our continent.En el presente artículo analizaremos la obra Donde se descomponen las colas de los burros de la dramaturga Carolina Vivas, la que puede ser leída como una recepción de la tragedia Antígona. En este sentido, nos interesa presentar la transformación del personaje y su argumento en el contexto latinoamericano, para visualizar cómo la apropiación previa del texto clásico en el continente influye en la obra de la autora colombiana y, a su vez, para destacar los elementos de la tragedia que ella rescata y modifica. Para esto presentaremos un recorrido por diversas las lecturas y recepciones de Antígona, enfatizando las realizadas en Latinoamérica. Estudiaremos todo lo anterior para circunscribir el lugar desde donde se sitúa la reescritura de Carolina Vivas y pensarla como una pieza que, debido a la particular forma en que reescribe el argumento y la figura de Antígona, se configura como un hito en la ya extensa tradición de recepciones de la tragedia de Sófocles en nuestro continente
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