2,613 research outputs found

    Framework Architecture Design for Emergency Response System

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    Emergency management is essential to mitigate the effects of unforeseen situations. However, this task is complex due to the large amount of information and complex procedures to be handled. To address these challenges, it is necessary to have tools that allow flexible responses to problems classified as knowledge-intensive procedures (KIP). In this sense, we propose the design of a framework for an Emergency Response System (ERS) based on Service Oriented Architecture (SOA) that integrates Adaptive Case Management (ACM) and Business Process Modelling (BPM). This framework is characterised by its interoperability with devices and collaborative systems, which allows the creation and association of content related to emergency management, thus improving usability. In addition, it is designed to be scalable, allowing the incorporation of new modular functionalities. Once the development of the framework has been completed, future lines of research will be opened for its validation and comparison with other ERS

    Selection for feed efficiency using the social effects animal model in growing Duroc pigs: evaluation by simulation

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    Background Traits recorded on animals that are raised in groups can be analysed with the social effects animal model (SAM). For multiple traits, this model specifies the genetic correlation structure more completely than the animal model (AM). Our hypothesis was that by using the SAM for genetic evaluation of average daily gain (ADG) and backfat thickness (BF), a high rate of improvement in feed conversion ratio (FCR) might be achieved, since unfavourable genetic correlations between ADG and BF reported in a Duroc pig line could be partially avoided. We estimated genetic and non-genetic correlations between BF, ADG and FCR on 1144 pigs using Bayesian methods considering the SAM; and responses to selection indexes that combine estimates of indirect (IGE) and direct (DGE) genetic effects for ADG and BF by stochastic simulation. Results Estimates of the ratio of the variance of DGE to the phenotypic variance were 0.31, 0.39 and 0.25 and those of the total genetic variance to the phenotypic variance were 0.63, 0.74 and 0.93 for ADG, BF and FCR, respectively. In spite of this, when the SAM was used to generate data and for the genetic evaluations, the average economic response was worse than that obtained when BV predictions from the AM were considered. The achieved economic response was due to a direct reduction in BF and not to an improvement in FCR. Conclusions Our results show that although social genetic effects play an important role in the traits studied, their proper consideration in pig breeding programs to improve FCR indirectly is still difficult. The correlations between IGE and DGE that could help to overcome the unfavourable genetic correlations between DGE did not reach sufficiently high magnitudes; also, the genetic parameters estimates from the SAM have large errors. These two factors penalize the average response under the SAM compared to the AM.info:eu-repo/semantics/publishedVersio

    Efectos de integraciones de firmas en mercados de bienes homogéneos

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    Este artículo modela los posibles efectos que, ante una integración empresarial, se pueden producir sobre el precio de un mercado de un bien homogéneo. El análisis se realiza a partir de dos escenarios: a) considerando tecnologías similares entre firmas y b) asumiendo algún grado de heterogeneidad por grupos de empresas. Se encuentra que aun en presencia de operaciones en favor de la eficiencia en la oferta del producto, existen riesgos de incremento en precios.Este artigo modela os possíveis efeitos que, diante de uma integração empresarial, podem ser produzidos sobre o preço de um mercado de um bem homogêneo. A análise realiza-se a partir de dois cenários: a) ao considerar tecnologias similares entre empresas e b) ao assumir algum grau de heterogeneidade por grupos de empresas. Encontra-se que, ainda na presença de operações em favor da eficiência na oferta do produto, existem riscos de aumento em preços.This article models the potential effects of firm mergers on the price of a market for homogenous goods. The analysis is carried out according to two scenarios: a) firms have similar levels of technology at their disposal and b) a degree of heterogeneity is assumed between groups of firms. It is found that even when mechanisms are in place to favor efficiency in product supply, there is a risk that prices will increase

    The Medici effect against the mosaic effect: hybridizations of the research curriculum in music education

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    La presente contribución se concibe como un espacio de reflexión sobre la propia investigación, concretamente sobre la configuración del currículum investigador de profesionales de la Educación Musical que proceden de la carrera musicológica pero que aterrizan en la didáctica teniéndose que adaptar a la investigación educativa por exigencias del sistema con mayor o menor suerte, resistencias o complejos. Tras el estudio y análisis de casos concretos, abogaremos por una línea integrada, interdisciplinar –e innovadora– (efecto Médici) más que por un currículum estratificado y pendular (efecto mosaico), el más frecuente en los investigadores descritos, así como de la necesidad del trabajo en red en lugar del individualismo imperante tradicionalmente en el área.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

    Stereoselective three-step one-pot cascade combining Amino- and Biocatalysis to access Chiral y-Nitro Alcohols

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    he combination of small-molecule catalysis and enzyme catalysis represents an underexploited area of research with huge potential in asymmetric synthetic chemistry due to both compatibility of reaction conditions and complementary reactivity. Herein, we describe the telescopic synthesis of chiral nitro alcohols starting from commercially available benzaldehyde derivatives through the one-pot three-step chemoenzymatic cascade combination of a Wittig reaction, chiral-thiourea-catalysed asymmetric conjugate addition, and ketoreductase-mediated reduction to access the corresponding target compounds in moderate to excellent overall isolated yields (36–80 %) and high diastereomeric and enantiomeric ratios (up to >97 : 3). This represents the first example of the combination of an organocatalysed asymmetric conjugate addition via iminium ion activation and a bioreduction step catalysed by ketoreductases

    Ferrocenyl Dinuclear Gold(I) Complexes. Study of their Structural Features and the Influence of Bridging and Phosphane Ligands in a Catalytic Cyclization Reaction

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    The combination of the ferrocene moiety with gold(I) catalysis remains a relatively unexplored field. In this article, we delve into the synthesis, characterization, and potential catalytic activity of four complexes utilizing both monodentate and bidentate ferrocenyl diphenylphosphane ligands (ppf and dppf), coordinated with two gold(I) metal centers, linked by either chloride or pentafluorophenylthiolate bridging ligands. This leads to the formation of cationic “self‐activated” precatalysts capable of initiating the catalytic cycle without the need for external additives. The catalytic activity of these complexes was assessed through a model reaction in gold(I) catalysis, specifically the cyclization of a N‐propargylbenzamide to produce an oxazole. In addition, we studied and compared the influence exerted by both the phosphane and the bridging ligand on the performance of these catalysts

    Sequence diversity on four ORFs of citrus tristeza virus correlates with pathogenicity

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    The molecular characterization of isolates of citrus tristeza virus (CTV) from eight locations in Mexico was undertaken by analyzing five regions located at the opposite ends of the virus genome. Two regions have been previously used to study CTV variability (coat protein and p23), while the other three correspond to other genomic segments (p349-B, p349-C and p13). Our comparative nucleotide analyses included CTV sequences from different geographical origins already deposited in the GenBank databases. The largest nucleotide differences were located in two fragments located at the 5' end of the genome (p349-B and p349-C). Phylogenetic analyses on those five regions showed that the degree of nucleotide divergence among strains tended to correlate with their pathogenicity. Two main groups were defined: mild, with almost no noticeable effects on the indicator plants and severe, with drastic symptoms. Mild isolates clustered together in every analyzed ORF sharing a genetic distance below 0.022, in contrast with the severe isolates, which showed a more disperse distribution and a genetic distance of 0.276. Analyses of the p349-B and p349-C regions evidenced two lineages within the severe group: severe common subgroup (most of severe isolates) and severe divergent subgroup (T36-like isolates). This study represents the first attempt to analyze the genetic variability of CTV in Mexico by constructing phylogenetic trees based on new genomic regions that use group-specific nucleotide and amino acid sequences. These results may be useful to implement specific assays for strain discrimination. Moreover, it would be an excellent reference for the CTV situation in México to face the recent arrival of brown citrus aphid

    Asociación entre el miedo al COVID-19 y la adherencia al tratamiento antirretroviral en personas con VIH-SIDA

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    Introduction. One of the most frequent psychological consequences of COVID-19 is fear, which could lead to non-optimal therapeutic adherence and, therefore, to the disease progression. Objectives. To evaluate the possible association between the fear of contracting COVID-19 and adherence to antiretroviral therapy in persons with HIV during the period between the third and fourth epidemic wave of COVID-19 in Peru. Methods. Analytical cross-sectional study in adults with HIV from the specialized center “Vía Libre” enrolled by non-probabilistic sampling. The validated “Fear of COVID-19 Scale” was used to measure the fear of getting sick from COVID-19, and the “SMAQ” questionnaire to assess therapeutic adherence. Results were presented descriptively, using chi-square for bivariate analysis and generalized linear models, Poisson family to calculate crude and adjusted prevalence ratios (aPR). Results. Between February and July of 2022, 149 adults with a median age of 35 years were enrolled, 91.3% being male, and 75,2% had undetectable viral load levels. No association was found between fear of contracting COVID-19 and HAART adherence (aPR: 0,99; 95% CI 0,97 to 1,02). Persons with a comorbidity were 89% more adherent than persons without comorbidities (RPa: 1,89; 95% CI 1,52 to 2,35). Conclusion. The fear of contracting COVID-19 was not associated with adherence to HAART during the third wave of COVID-19 pandemic in Peru. However, presenting a comorbidity was associated with optimal HAART adherence. Emphasis should be placed on potential factors affecting medication adherence in people with HIV during the COVID-19 pandemic.Introducción. Una de las consecuencias psicológicas más frecuentes del COVID-19 es el miedo. Éste podría ocasionar una adherencia terapéutica no óptima y permitir la progresión de la enfermedad en personas con VIH. Objetivo. Evaluar la asociación entre el miedo a contraer COVID-19 y la adherencia al tratamiento antirretroviral en personas con VIH entre la tercera y cuarta ola epidémica de COVID-19 en el Perú. Métodos. Estudio transversal analítico en adultos con VIH del centro especializado Vía Libre enrolados por muestreo no probabilístico. Se empleó la escala Fear of COVID-19 Scale para medir el miedo a contraer COVID-19, y el cuestionario SMAQ para evaluar la adherencia terapéutica. Los resultados se presentaron de forma descriptiva, usando chi cuadrado para el análisis bivariado y modelos lineales generalizados familia Poisson para estimar razones de prevalencia crudas y ajustadas (RPa). Resultados. Entre febrero - julio del 2022, se enrolaron 149 personas con una mediana de edad de 35 años, el 91,3% fueron varones, y el 75,2% con carga viral indetectable. No se halló asociación entre el miedo a contraer COVID-19 y la adherencia terapéutica (RPa: 0,99; IC95%: 0,97 a 1,02). Adicionalmente, encontramos que las personas que presentaban alguna comorbilidad fueron 89% más adherentes que los que no las presentaban (RPa: 1,89; IC95%: 1,52 a 2,35). Conclusión. El miedo a contraer COVID-19 no se asoció a la adherencia al TARGA durante la tercera ola de pandemia en el Perú. Sin embargo, el presentar alguna comorbilidad se asoció a una adherencia terapéutica óptima. Se debe poner énfasis en los posibles factores que afecten la adherencia en personas con VIH durante la pandemia por COVID-19

    Unravelling the role of triisopropylphosphane telluride in Ag(I) complexes

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    The coordination chemistry of chalcogenide ligands has always attracted significant interest in the field of inorganic chemistry, especially for soft metals such as those of group 11. Despite the scarcity of research on phosphane tellurides, we report on the synthesis and characterisation of five novel silver complexes containing the phosphane telluride ligand, TeP(iPr)3, along with other ancillary ligands such as mono or diphosphanes. Spectroscopic studies were performed to investigate the behaviour of these complexes, including their redox properties, as demonstrated by the 1,1′-diphenylphosphaneferrocene (dppf) silver derivatives. Additionally, these complexes showcase remarkable rapid interchange equilibrium, revealing silver species with distinctive Ag2Te2 cores and a combination of bridging and terminal TeP(iPr)3 ligands. A promising avenue for further investigation and potential applications emerges
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