228 research outputs found

    Combination of the three types of diversity to design high capacity compact MIMO terminal

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    Multiple-input-multiple-output (MIMO) schemes designed to increase channel capacity face strong limitations when a large number of antennas must be deployed in a terminal due to size constrains. This letter discusses how the different combinations of the three types of diversities-namely spatial, radiation pattern, and polarization diversity-can be used to get an improved capacity in compact terminals. The study compares realistic combinations that overcome the need for a large number of radiating elements in the user terminal.This work was supported in part by the Spanish Ministry of Sci-ence and Innovation under Project GRE3NSYST (TEC2011-29006-C03-03), Project TEC2013-44019-R, and the CONSOLIDER-INGENIO 2010 program under Project COMONSENS (CSD 2008-00010).Publicad

    Plant Strategies To Control Growth And Development: Integration Of Both Signal Molecules, Auxin And Nitric Oxide

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    The term auxin is derived from the Greek word ?auxein,? which means to grow or to expand and 3 was sealed by Charles Darwin more than a century ago. In ?The Power of Movement in Plants? 4 (1880), Darwin first described the effects of light on the movement of canary grass 5 coleoptiles. He demonstrated that the tip of the seedling was responsible for producing some 6 signal, namely auxin, which was transported to the lower part of the coleoptile, where the 7 physiological response of bending following the light occurred. Auxin is probably the most 8 intensely-studied molecule in plants as it impacts virtually every aspect of growth and 9 development during their life cycle. 10The role of auxin is warranted by the coordination of its synthesis, metabolism, transport, and 11 perception. The plant cell traduces the auxin signal through a well-characterized nuclear 12 signaling pathway, triggering transcriptional responses depending on a specific cell, tissue, or 13 organ. 14Auxin signaling pathway initiates once the hormone moves into the nucleus and is bound by a 15 coreceptor system by the E3 ubiquitin ligase SCFTIR1/AFBs and its degradation substrates 16 AUX/IAAs transcriptional repressors. Upon auxin binding SCFTIR1/AFBs trigger ubiquitylation 17 and further AUX/IAA turnover by the proteasome. AUX/IAAs block the expression of auxin-18 responsive genes, their degradation is essential for auxin pathway activation. 19Since plants are sessile organisms unable to escape changes in the environment, the degradation 20 of pre-synthesized AUX/IAA repressor proteins instead of the de novo synthesis of activation 21 proteins constitutes a more rapid and efficient strategy for the activation of molecular pathways 22 required to adapt to new situations. Thus, the ubiquitin proteasome system via the exquisite 23 action of specific E3 ubiquitin ligases, such as the SCFTIR1/AFBs recruit directly proteins 24 degradation substrates. SCF-type E3 ligases are the most abundant substrate recognition 25 complexes in eukaryotic cells and have been implicated in every major phytohormone signaling 26 pathway. Each individual SCF E3 ligase is a multimer consisting of a scaffold protein Cullin 1, a 27 RING RBX1 for binding an E2 conjugating enzyme loaded with ubiquitin, and a substrate 28 binding module build by the adaptor protein, SKP1 (in Arabidopsis ASK1) and, an 29 interchangeable substrate-recognition unit F-box Protein (FBP). 30In the last decade we have gained tremendous knowledge of how the signal auxin is perceived 31 and transmitted, and now we are starting to unveil a new level of regulation of the system at the 32 level of SCFTIR1/AFB stability. Since the Arabidopsis genome encodes hundreds of FBPs, and 33 ASK is able to associate with diverse FBPs to form multiple SCF complexes, the challenge of 34 regulating SCF assembly is particularly relevant. The SCF complex is therefore an exceptional 35 core in which different levels of post-translational modifications might take place. In addition to 36 auxin, nitric oxide (NO) is considered a ubiquitous signal in plants which contributes to 37 determining the morphology and developmental pattern of roots, in part by the modulation of 38 auxin response. Previously, we gained evidence on the role of the second messenger NO for the 39 regulation of the FBP TIR for auxin sensing. We wondered further whether NO might play a 40 broader role regulating the SCFTIR/AFB and its functionality in the plant cell.Fil: Calderon Villalobos, Luz Irina. Leibniz Institut Fur Pflanzenbiochemie; AlemaniaFil: Iglesias, María José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Biológicas. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Biológicas; ArgentinaFil: Terrile, Maria Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Biológicas. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Biológicas; ArgentinaFil: Casalongue, Claudia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Biológicas. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Biológicas; Argentin

    Fully bio-based and biodegradable polylactic acid/poly(3-hydroxybutirate) blends: Use of a common plasticizer as performance improvement strategy

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    Biodegradable polymeric blends based on poly(3-hydroxybutyrate) (PHB) and polylactic acid (PLA) were prepared by melt mixing. Trybutyrin, a bio-based plasticizer, was added at a fixed proportion in all blends. Crystal structure, percent crystallinity, miscibility, mechanical properties and permeation of fully biodegradable PHB/PLA blends were investigated in detail by Differential Scanning Calorimetry (DSC), Fourier Transformed Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), tensile tests and water vapor permeation tests. From the thermal test, two glass transition temperatures were found for the whole range of compositions, which reveals the immiscibility between PHB and PLA. Moreover, the biphasic melt further confirms this fact. Tensile tests showed an increase in the elongation at break with the PLA content. SEM images reveal debonding between the interfacial surfaces, which justifies the increase in the elongation at break. Water vapor permeation values for blends were slightly higher than that of the plasticized pristine polymer. The plasticized polymer blends showed valuable properties to extend the applications of PHB and PLA.Fil: D'amico, David Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; ArgentinaFil: Iglesias Montes, Magdalena Luz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; ArgentinaFil: Manfredi, Liliana Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; ArgentinaFil: Cyras, Viviana Paola. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentin

    Sur del Atlántico, Colombia, calamidad u oportunidad.

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    1 archivo PDF (Tipo: Presentación) : principalmente ilustraciones ; 31 diapositivas. SUIOCT

    Productivity of incident management with conversational bots-a review

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    The use of conversational agents (bots) in information systems managed by company’s increases productivity in the development of activities focused on processes such as customer service, healthcare, and presentation. The present work is a systematic literature review that collects articles from 2019 to 2022 in the databases Scopus, Springer, Willey, Indexes-Csic, Taylor & Francis, Pubmed, and Ebsco Host. PRISMA methodology was used to systematize 47 relevant articles. As a result of the analysis, 2/19 very important benefits were obtained, which are: helping to obtain information and facilitating customer service; as for the types of conversational bots, a total of 9 types were found, of which conversational agents and chatbots with artificial intelligence (AI) are the most common; in the case of processes, 3/5 processes that optimize conversational bots were found, where the most prominent are: teaching process, health processes, and customer service processes. An architecture model for conversational bots in incident management is also proposed

    La cámara Gesell como prueba anticipada y la imputación objetiva en el delito de violación sexual de menores de edad

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    La investigación realizada, tuvo como objetivo principal determinar si la cámara Gesell constituye como prueba anticipada en el delito de violación sexual de menores de edad para lo cual se realizó un análisis a nuestra legislación nacional, así como doctrina internacional, teniendo como objetivos específicos el describir la cámara Gesell en el proceso penal, explicar la importancia de la prueba anticipada y por último, analizar si el uso de la cámara Gesell como prueba anticipada disminuye la revictimización en los menores de edad. Así también, la metodología que se realizó es tipo básico, con diseño analítico descriptivo y con un enfoque cualitativo. Para realizar la recolección de datos, se consideró como técnica la entrevista y análisis documental, los cuales fueron aplicados mediante la guía de entrevista a 10 especialistas en derecho penal, abogados litigantes y fiscales. Finalmente, se llegó a concluir que, si es jurídicamente viable considerar a la Cámara Gesell como una prueba anticipada en el delito de violación sexual de menores, teniendo como base normativa el artículo 242° numeral 2 del CPP que regula los supuestos de prueba anticipada y considerando como uno, a la declaración testimonial de menores y adolescentes inmersos en el delito de violación sexual

    Burnout e inteligencia emocional en docentes de Instituciones Educativas en la ciudad de Cajamarca en el año 2017

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    RESUMEN El presente trabajo de investigación tiene como finalidad estudiar si existe relación entre el Burnout e Inteligencia Emocional en los docentes de la Instituciones Educativas de la ciudad de Cajamarca, para lo cual se realizó un estudio de diseño descriptivo correlacional. Se evaluó a un total de 97 docentes, correspondiente a los colegios dentro del perímetro de la ciudad de Cajamarca, de ambos sexos, de los niveles Primaria y Secundaria. Los datos se obtuvieron utilizando la Escala de Inventario Burnout de Maslach (MBI) y de inteligencia emocional EQ-I Bar0n Emotional Quotient Inventory, llevándose a cabo el análisis de ítems y se estableció la validez y confiabilidad de ambos instrumentos. La evaluación del Burnout se centró en las siguientes áreas: agotamiento emocional despersonalización y realización personal. Asimismo, para la evaluación de Inteligencia emocional, se tomó en cuenta las áreas que evalúa como: Componente Intrapersonal (CIA): Área que reúne los siguientes componentes: Comprensión emocional de sí mismo (CM), Asertividad (AS),Auto concepto (AC),Autorrealización (AR),Independencia (IN), Componente Interpersonal (CIE): Área que reúne los siguientes componentes: Empatía (EM), Relaciones Interpersonales (RI), Responsabilidad Social (RS), Componente de Adaptabilidad (CAD): Área que reúne los siguientes componentes: Solución de Problemas (SP), Prueba de la realidad (PR), Flexibilidad (FL), Componente del Manejo del Estrés (CME): Área que reúne los siguientes componentes: Tolerancia al Estrés (TE),Control de Impulsos (CI),Componente del Estado de Ánimo en General (CAG): Área que reúne los siguientes componentes: Felicidad (FE),Optimismo (OP). Encontrándose que no existe correlación significativa entre el burnout y la inteligencia emocional.ABSTRACT This academic work has an objective study if there is a relation between Burnot and emotional intelligence between Cajamarca’s schools’ teachers, considering for this a descriptive correlational study research, 97 female and male teachers of primary and secondary from Cajamarca’s schools were evaluated. All the information was obtained by using a Burnot of Maslachand scale and an intelligence scale “Quotient Inventory”. The analysis of 20 items stablished the validity and reliability of both instruments. The evaluation of burnout was focused on: emotional exhaustion and personal achievement, similarly to evaluate emotional intelligence, was considered the following areas such us; intrapersonal component (CIA): conformed by emotional comprehension (EC), assertiveness(AS), self-concept, self-realization, independence, interpersonal component: conformed by empathy, interpersonal relations, Social Responsibility, adaptability, comformed by problem solution, reality evaluation, flexibility, management of stress, conformed by, self-control, personal emotion; conformed by happiness, and optimism. Finding there is not correlation between burnout and the emotional intelligence

    Design and Characterization of PLA Bilayer Films Containing Lignin and Cellulose Nanostructures in Combination With Umbelliferone as Active Ingredient

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    Poly (lactic acid) (PLA) bilayer films, containing cellulose nanocrystals (CNC) or lignin nanoparticles (LNP) and Umbelliferone (UMB) were extruded and successfully layered by thermo-compression starting from monolayer films. Lignocellulosic nanostructures were used in PLA based film as nanofillers at 3 wt.%, while UMB was used as active ingredient (AI) at 15 wt.%. The effects of processing techniques, presence, typology and content of lignocellulosic nanoparticles have been analyzed and thermal, morphological, mechanical and optical characterization of PLA nanocomposites have been made.Furthermore, X-ray diffraction (XRD) and Fourier Transform Infrared spectroscopy (FTIR) studies evaluated the presence of nanofillers and AI at chemical level. Bilayer formulations showed a good interfacial adhesion and improved stress at break with respect of PLA monolayers, although they were less stretchable and transparent. Data obtained from thermal, colorimetric and transparency investigations underlined that the presence of lignocellulosic nanofillers and AI in PLA monolayer and bilayer films induced relevant alterations in terms of overall color properties and thermal stability, while antioxidant activity of umbelliferone was enhanced by the addition of lignin in produced materials.Fil: Iglesias Montes, Magdalena Luz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; ArgentinaFil: Luzi, Francesca. Università di Perugia; ItaliaFil: Dominici, Franco. Università di Perugia; ItaliaFil: Torre, Luigi. Università di Perugia; ItaliaFil: Cyras, Viviana Paola. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; ArgentinaFil: Manfredi, Liliana Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; ArgentinaFil: Puglia, Debora. Università di Perugia; Itali

    Estabilidad laboral de la mujer trabajadora en estado de embarazo

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    The constitution of a family is a very important motivation for workers. However, pregnancy and motherhood are times of vulnerability for women workers and their families. Working women in pregnancy and working mothers in breastfeeding require special protection to avoid harm to their health or that of their children. At the same time, they require protection that guarantees them the continuity of their employment. The State recognizes and pays special attention to this situation and has as an initiative to recognize the rights that are obtained at the beginning of the pregnancy stage. As a general objective it is to describe what are the requirements that the Ministry of Labor requires to authorize the dismissal of a woman in a pregnancy The methodological strategy used to carry out this research is framed in a descriptive, quantitative-qualitative approach, basically in those that fall within the scope of the Hermeneutical Method whose purpose is to understand and interpret and used documentary analysis as a technique. The main conclusion that stands out is that to terminate the work contract, it is necessary to have prior authorization from the Ministry of Labor. The dismissal of a working woman who is in a state of pregnancy, must obey to an objective cause or a just cause duly proven, in addition to the previous qualification of the competent administrative authorityLa constitución de una familia es una motivación muy importante para los trabajadores. Sin embargo, la gestación  y la maternidad son tiempos de vulnerabilidad para las trabajadoras y sus familias. Las mujeres trabajadoras en estado de gestación   y las madres trabajadoras en período de lactancia requieren una especial protección para evitar daños a su salud o a la de sus hijos. Al mismo tiempo, requieren una protección que les garantice la continuidad de su empleo. El Estado reconoce y presta especial atención ante esta situación y tiene como iniciativa reconocer los derechos que se obtiene al iniciar la etapa de embarazo y Como objetivo general se tiene la de describir  cuáles son los requisitos que exige el Ministerio del Trabajo para autorizar el despido de una mujer en Estado de embarazo. La estrategia metodológica utilizada para realizar esta investigación se enmarca en un enfoque descriptivo, cuantitativo-cualitativo, básicamente en las que se inscriben en el ámbito del Método Hermenéutico cuya finalidad es comprender e interpretar y se utilizó como técnica el análisis documental.  La principal conclusión que se destaca  es que para dar por terminado el contrato de trabajo, es necesario contar con la autorización previa del Ministerio del trabajo.  El despido de una mujer trabajadora que se halla en esta condición de embarazo, debe obedecer a una causal objetiva o una justa causa debidamente comprobada, además de la previa calificación de la autoridad administrativa competent

    Potencialidades de bactérias produtoras de poli-hidroxialcanoato (PHA) isoladas de Asparagus officinalis L.

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    Objective: to determine the production of polyhydroxyalkanoates produced by potentially nitrogen-fixing bacteria isolated from Asparagus officinalis L. Methods: Samples of rhizospheric soil, previously disinfected roots and stems, were cultivated in nitrogen-free media to isolate rhizospheric and endophytic fixing bacteria, respectively. In a fermentation broth with glycerol as a carbon source, the production of PHA granules by these bacteria was investigated, staining them with Sudan Black B after 24 and 48 hours. The two bacterial cultures in which the highest number of cells with PHA granules were observed were fermented with glycerol in the balanced and unbalanced media for 36 hours, determining the biomass. Result: 51.1% of the fixing bacteria were rhizospheric and 48.9% endophytic. PHA granules were detected in 56.67% of the bacteria. Yp / x yield was 0.57855 g / g (Azospirillum sp.155) and 0.22543 g / g (Azospirillum sp.130) in the balanced medium and 0.76718 g / g (Azospirillum sp.155) and 0.26229 g / g (Azospirillum sp. 130) in the unbalanced medium, after 32 hours of fermentation. Conclusion: PHA production by nitrogen-fixing bacteria isolated from asparagus was demonstrated.Objetivo: determinar la producción de polihidroxialcanoatos producidos por bacterias potencialmente fijadoras de nitrógeno aisladas de Asparagus officinalis L. Métodos: Muestras de suelo rizosférico, raíces y tallos previamente desinfectados, se cultivaron en medios sin nitrógeno para aislar bacterias fijadoras rizosféricas y endófitas, respectivamente. En caldo fermentación con glicerol como fuente de carbono, se investigó la producción de gránulos de PHA por estas bacterias, coloreándolas con Sudan Negro B después de 24 y 48 horas. Los dos cultivos bacterianos en los que se observó el mayor número de células con gránulos de PHA se llevaron a fermentación con glicerol en los medios balanceado y desbalanceado durante 36 horas, determinándose la biomasa. Resultado: El 51,1 % de las bacterias fijadoras fueron rizosféricas y el 48,9 % endófitas. En el 56,67 % de las bacterias se detectaron gránulos de PHA. El rendimiento Yp/x fue de 0,57855 g/g (Azospirillum sp.155) y 0,22543 g/g (Azospirillum sp.130) en el medio balanceado y 0,76718 g/g (Azospirillum sp.155) y 0,26229 g/g (Azospirillum sp.130) en el medio desbalanceado, después de 32 horas de fermentación. Conclusión: Se demostró la producción de PHA por las bacterias fijadoras de nitrógeno aisladas de espárrago.Objetivo: determinar a produção de polihidroxialcanoatos produzidos por bactérias potencialmente fixadoras de nitrogênio isoladas de Asparagus officinalis L. Métodos: Amostras de solo rizosférico, raízes e caules previamente desinfetados, foram cultivadas em meio livre de nitrogênio para isolar bactérias fixadoras rizosféricas e endofíticas, respectivamente. Em caldo de fermentação com glicerol como fonte de carbono, foi investigada a produção de grânulos de PHA por essas bactérias, colorindo-os com Sudan Black B após 24 e 48 horas. As duas culturas bacterianas nas quais foi observado o maior número de células com grânulos de PHA foram fermentadas com glicerol no meio balanceado e desbalanceado por 36 horas, determinando a biomassa. Resultado: 51,1% das bactérias fixadoras eram rizosféricas e 48,9% endofíticas. Grânulos de PHA foram detectados em 56,67% das bactérias. O rendimento de Yp / x foi de 0,57855 g / g (Azospirillum sp.155) e 0,22543 g / g (Azospirillum sp.130) no meio balanceado e 0,77618 g / g (Azospirillum sp.155) e 0,26229 g / g (Azospirillum sp. 130) no meio desequilibrado, após 32 horas de fermentação. Conclusão: Foi demonstrada a produção de PHA por bactérias fixadoras de nitrogênio isoladas de aspargos
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