3,419 research outputs found

    Multi-light photogrammetric survey applied to the complex documentation of engravings in Palaeolithic rock art: the Cova de les Meravelles (Gandia, Valencia, Spain)

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    [EN] The new phase of study and revision of the Palaeolithic art of the Cova de les Meravelles, as well as the advances made in the field of 3D documentation in recent years, have motivated a new documentation campaign on the main panel full of tiny engraved motifs. The difficulties involved in acquiring and processing data executed using fine and thin engraving techniques indoors, have been solved through a multi-light photogrammetric survey, photographing the main panel surface with five lighting directions, and applying principal component analysis (PCA). This procedure has allowed us to obtain a large corpus of two and three-dimensional data and to improve the documentation base produced 17 years ago after its discovery. In this paper, we present the procedure followed, the enhanced engraving results in the new documentation campaign, its most significant contributions to the complex archaeological survey, and the limits we have found along the procedure.This work has been part of the project HAR2017-85153-P ("Sintesis del Paleolitico medio y superior en Valencia y Murcia: aspectos cronologicos, paleoambientales, economicos y culturales") and the programme PRE2018085961, financed by Ministerio de Ciencia e Innovacion, FEDER y FSE, as well as the project PROMETEO/2017/060 ("El pasado lejano: aproximacion a la conducta y la ocupacion del territorio en el paleolitico valenciano") financed by Generalitat Valenciana. The authors gratefully acknowledge the fnancial support of Ministerio de Ciencia e Innovación and Generalitat Valenciana.Lerma, JL.; Martínez-Valle, R.; Cantó, A.; Villaverde Bonilla, V. (2022). Multi-light photogrammetric survey applied to the complex documentation of engravings in Palaeolithic rock art: the Cova de les Meravelles (Gandia, Valencia, Spain). Heritage Science. 10(1):1-15. https://doi.org/10.1186/s40494-022-00815-111510

    Presión arterial : ¿esfigmomanómetro manual o digital?

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    El presente es un estudio prospectivo y comparativo entre la medición de la presión arterial obtenida de manera manual con esfigmomanómetro aneroide y la obtenida mediante monitor automático. El desarrollo de la práctica se realizó sobre un grupo de 100 pacientes hospitalizados en el servicio de Neurocirugía y Otorrinolaringología del Consorcio Hospital General de Valencia durante el primer trimestre del año 2007, mediante mediciones secuenciales y efectuadas por el mismo observador con ambos aparatos bien calibrados. Se observó mediante el método de correlación bivariada de Pearson que no existen diferencias estadísticamente significativas entre las presiones tomadas por ambos aparatos determinando así la fiabilidad del aparato automático utilizado en esta sala para el registro de la tensión arterial.This is a prospective and comparative work between arterial pressure obtained through manual measurement with aneroid sphygmomanometer and the arterial pressure obtained through automatic monitor. The practice was carried out in a group of 100 inpatients in the Neurosurgery and Otolaryngology Service in the Consortium of the General Hospital of Valencia during the first term of 2007. The development of this hospital training was made on each individual through sequential measurements and executed by the same observer with both well-calibrated machines. It was observed that through the method of Pearson's bivaried correlation there are not statistically significant differences between the pressures taken by both machines. As regards this fact, both automatic machines of arterial pressure register are [email protected] [email protected]

    The Heritage Interest of the Cretaceous Amber Outcrops in the Iberian Peninsula, and Their Management and Protection

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    All the amber outcrops of the Iberian Peninsula are Lower Cretaceous in age and, in the case of Spain, some of them have provided important arthropod specimens preserved as bioinclusions. These Spanish localities are rich in fossil taxa of phylogenetic relevance and evidence of both paleoecological interactions and paleobehaviors are also abundant. Despite their high heritage interest, the actions conducted to their protection and management have been very unequal. In some cases, only the generic laws of national or autonomous scopes protect this heritage. In this paper, the state of the art of the Iberian Peninsula amber outcrops and a review of the major Cretaceous amber outcrops worldwide for comparison are presented. That comparison shows, in general, that the best protection, both legal and physical, occurs in Spain and that the case of Portugal is very different. In addition, some actions aimed at a more effective protection and management of the amber outcrops in Spain and Portugal are proposed, for example the proposal to consider the San Just outcrop, located in the Aragonese Community, under a protection designation as is the so called Bien de Interés Cultural

    Propuesta metodológica para la evaluación de proyectos en cinco pasos

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    Objective: To carry out a methodological proposal for the evaluation of projects in five steps, which allows the procedure to be developed in a practical, easy, fast and orderly manner, generating understanding, effectiveness and efficiency in the analysis and confidence in the results obtained. Design / methodology / approach: It is based on the analytical-deductive cost-benefit ratio and the extrapolation method. The problem was identified and the five steps for project evaluation were structured. Results: The methodology for the evaluation of projects in five steps is proposed. Limitations / implications: There is limited knowledge of the analysis process translated into a disarticulation of the development of the procedure and distrust of the results obtained. It is because the designer is not a financial specialist and lacks theoretical support and methodological focus on the subject. Findings / Conclusions: This methodological proposal allows the development of the procedure in a practical, easy, fast and orderly manner, generating understanding, effectiveness and efficiency in the analysis and confidence in the results obtained for the decision making in the instrumentation of the Projects. It does have theoretical-practical utility and strengthens the theory of project evaluation.Objetivo: Realizar una propuesta metodológica para la evaluación de proyectos en cinco pasos, que permita desarrollar el procedimiento de forma práctica, fácil, rápida y ordenada, generando comprensión, eficacia y eficiencia en el análisis y confianza en los resultados obtenidos. Diseño/metodología/aproximación: Se basa en el método analítico-deductivo relación beneficio-costo y el método de extrapolación. Se identificó el problema y se estructuró los cinco pasos para la evaluación de proyectos. Resultados: Se propone la metodología para la evaluación de proyectos en cinco pasos. Limitaciones / implicaciones: Existe un limitado conocimiento del proceso de análisis traducido en una desarticulación del desarrollo del procedimiento y desconfianza en los resultados obtenidos. Se debe a que el proyectista no es especialista financiero y carece de sustento teórico y enfoque metodológico en el tema. Hallazgos / conclusiones: La propuesta metodológica permite llevar a cabo el desarrollo del procedimiento de forma práctica, fácil, rápida y ordenada, generando comprensión, eficacia y eficiencia en el análisis y confianza en los resultados obtenidos para la toma de decisiones en la instrumentación de los proyectos. Sí tiene utilidad teórica–práctica y fortalece la teoría de evaluación de proyectos

    Synergistic and antibiofilm activity of the antimicrobial peptide P5 against carbapenem-resistant Pseudomonas aeruginosa

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    In the search for new antimicrobial molecules, antimicrobial peptides (AMPs) offer a viable alternative to conventional antibiotics, as they physically disrupt the bacterial membranes, leading to membrane disruption and eventually cell death. In particular, the group of linear α-helical cationic peptides has attracted increasing research and clinical interest. The AMP P5 has been previously designed as a cationic linear α-helical sequence, being its antimicrobial and hemolytic properties also evaluated. In this work, we analyzed the feasibility of using P5 against a carbapenem-resistant clinical isolate of Pseudomonas aeruginosa, one of the most common and risky pathogens in clinical practice. After antimicrobial activity confirmation in in vitro studies, synergistic activity of P5 with meropenem was evaluated, showing that P5 displayed significant synergistic activity in a time kill curve assay. The ability of P5 to permeabilize the outer membrane of P. aeruginosa can explain the obtained results. Finally, the antibiofilm activity was investigated by viability analysis (MTT assay), crystal violet and confocal imaging, with P5 displaying mild biofilm inhibition in the range of concentrations tested. Regarding biofilm disruption activity, P5 showed a higher efficacy, interfering with biofilm structure and promoting bacterial cell death. Atomic force microscope images further demonstrated the peptide potential in P. aeruginosa biofilm eradication, confirming the promising application of P5 in multi-resistant infections therapeutics.Fil: Martínez, Melina María Belén. Universidad Nacional de Quilmes. Departamento de Ciencia y Tecnología. Laboratorio de Microbiología Molecular; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Gonçalves, Sónia. Universidade Nova de Lisboa; PortugalFil: Felício, Mário R.. Universidade Nova de Lisboa; PortugalFil: Maturana, Patricia del Valle. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet Noa Sur. Centro de Investigación en Biofísica Aplicada y Alimentos. - Universidad Nacional de Santiago del Estero. Centro de Investigación en Biofísica Aplicada y Alimentos; ArgentinaFil: Santos, Nuno C.. Universidade Nova de Lisboa; PortugalFil: Semorile, Liliana Carmen. Universidad Nacional de Quilmes. Departamento de Ciencia y Tecnología. Laboratorio de Microbiología Molecular; ArgentinaFil: Hollmann, Axel. Universidad Nacional de Quilmes. Departamento de Ciencia y Tecnología. Laboratorio de Microbiología Molecular; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet Noa Sur. Centro de Investigación en Biofísica Aplicada y Alimentos. - Universidad Nacional de Santiago del Estero. Centro de Investigación en Biofísica Aplicada y Alimentos; ArgentinaFil: Maffia, Paulo Cesar. Universidad Nacional de Quilmes. Departamento de Ciencia y Tecnología. Laboratorio de Microbiología Molecular; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

    Color conductivity and ladder summation in hot QCD

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    The color conductivity is computed at leading logarithmic order using a Kubo formula. We show how to sum an infinite series of planar ladder diagrams, assuming some approximations based on the dominance of soft scattering processes between hard particles in the plasma. The result agrees with the one obtained previously from a kinetical approach.Comment: 15 pages, 4 figures. Explanations enlarged, two figures and some refs added, typos corrected. Final version to be published in Phys.Rev.

    Musicoterapia en una Unidad de Cuidados Intensivos Neonatales: experiencia benéfica para el binomio

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    ResumenIntroducciónDesde hace varios años se está utilizando la música como herramienta terapéutica y preventiva en la neonatología, se han documentado en un gran número de artículos de investigación, sin embargo, en México esta técnica es poco utilizada.ObjetivoMejorar las condiciones de los neonatos atendidos en una Unidad de Cuidados Intensivos (UCIN) y sus familiares, mediante el uso de musicoterapia, para minimizar el estrés y los daños colaterales.Materiales y métodosUn grupo de 2 neonatólogos, 3 residentes de pediatría, 10 enfermeras y un concertista profesional de violín, llevaron a cabo 6 sesiones musicales semanales en la Unidad de Cuidados Intensivos Neonatales Externos del Hospital Civil de Guadalajara. Durante el concierto se valoró individualmente a cada neonato, registrando los signos vitales por monitorización electrónica, además se registró el estado anímico de los familiares.ResultadosDurante las sesiones de música los neonatales no presentaron cambios significativos en sus constantes vitales, en el personal de la UCIN y en los padres de recién nacidos hospitalizados se vieron efectos benéficos, refiriendo disminución del estrés y altos índices de satisfacción.ConclusionesLa música puede tener un efecto positivo como terapia coadyuvante en neonatos de alto riesgo, principalmente en prematuros. Se recomienda difundir y aplicar esta metodología en las UCIN del país.AbstractIntroductionSince several years ago, music has been used as a therapeutic and preventive tool in neonatology. A great number of research papers have been written on the subject; however, this technique is rarely used in Mexico.ObjectiveTo improve the condition of neonates at Neonatal Intensive Care Units (NICU) and their relatives, in order to minimize any stress and collateral damage.Material and methods: A group of two neonatologists, 3 residents, 10 nurses and a professional concert violinist, conducted six weekly music sessions in the Outpatient Neonatal Intensive Care Unit (ONICU) of our institution. During the concert, we individually assessed each newborn, recording vital signs through electronic monitoring; additionally, we recorded the mood of any other family members present.ResultsDuring the music sessions, the neonatal patients showed no significant changes in vital signs; yet, ONICU staff and the parents/relatives of hospitalized newborns showed beneficial effects, reporting decreased stress and high levels of satisfaction.ConclusionsMusic can have a positive effect as adjunctive therapy in high-risk newborns, especially in premature babies. We therefore recommend applying this methodology in the ONICU

    Transport coefficients and ladder summation in hot gauge theories

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    We show how to compute transport coefficients in gauge theories by considering the expansion of the Kubo formulas in terms of ladder diagrams in the imaginary time formalism. All summations over Matsubara frequencies are performed and the analytical continuation to get the retarded correlators is done. As an illustration of the procedure, we present a derivation of the transport equation for the shear viscosity in the scalar theory. Assuming the Hard Thermal Loop approximation for the screening of distant collisions of the hard particles in the plasma, we derive a couple of integral equations for the effective vertices which, to logarithmic accuracy, are shown to be identical to the linearized Boltzmann equations previously found by Arnold, Moore and Yaffe.Comment: 34 pages, 7 figures v2. Added discussion on box topologies for the ladder rungs. Version to appear in Phys. Rev.

    Nitrógeno total en maíz forrajero (Zea mays L.) estimado mediante índices espectrales con el satélite Sentinel-2

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    El nitrógeno es el nutriente más importante en cultivos forrajeros, debido a su participación en diversas reacciones bioquímicas en las diferentes etapas fenológicas de la planta. El objetivo del presente estudio fue desarrollar un modelo de regresión lineal múltiple para estimar el nitrógeno total (Nt) en planta de maíz a partir de imágenes satelitales. El porcentaje de Nt se determinó mediante tres muestreos de planta en cuatro parcelas experimentales. El modelo de estimación se obtuvo al procesar las imágenes satelitales Sentinel-2 de acuerdo a las fechas de muestreo, se calcularon 13 índices espectrales y se analizó la asociación entre los valores del contenido de nitrógeno y la reflectancia a través de: análisis de componentes principales (ACP), matriz de correlación y dendrograma. Los índices con mayor relación fueron MCARI/OSAVI, TCARI/OSAVI, MCARI/OSAVI RE y TCARI/OSAVI RE, esto permitió explicar más de 50% de la variabilidad del modelo propuesto y un EMC de 0.12. El presente estudio indicó que el cálculo de índices espectrales derivados de Sentinel-2 tiene gran potencial para conocer el estado nitrogenado del cultivo de maíz, sin embargo, para futuras investigaciones se sugiere obtener modelos de estimación de Nt por etapa fenológica del cultivo
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