Spin crossover transition driven by pressure: Barocaloric applications

This article describes a mean-field theoretical model for Spin-Crossover (SCO) materials and explores its implications. It is based on a simple Hamiltonian that yields the high spin molar fraction as a function of temperature and pressure, as well as a temperature-pressure phase diagram for the SCO transition. In order to test the model, we apply it to the giant Barocaloric Effect (BCE) of the SCO material [FeL$_2$][BF$_4$]$_2$ and comprehensively analyse its behavior. We found that optical phonons are responsible for 92\% of the total barocaloric entropy change. DFT calculations show that these optical phonons are mainly assigned to the low frequencies modes of vibration ($<400$ cm$^{-1}$), being associated to the Fe coordination.Comment: 6 figure

Método de classificação do desempenho funcional de risco na segurança viária para a gestão operacional das rodovias de pista simples e rural.

TCC (especialização) - Universidade Federal de Santa Catarina. Curso de Especialização em Operações Rodoviárias.As características físicas e ambientais das rodovias rurais de pista simples determinam condições de desempenho funcional que contribuem para a apreciação do fator viário e sua influência sobre a segurança viária através da proposição de um Indicador Classificatório dos segmentos. Esta medida fornece um perfil de maior ou menor risco, como uma função proativa, tendo por objetivo confrontá-lo com os índices reativos dos acidentes e taxa de acidentes críticas, permitindo melhor análise dos segmentos homogêneos e críticos. Aplicou-se um Método Experimental envolvendo a graduação de valores dos subfatores e o influxo variável do volume de trafego, como elemento definidor da capacidade da rodovia. Para realizar os estudos de caso nas BR-153 e 476/PR adotou-se uma avaliação com o Diagrama de Venn sobre o agrupamento dos acidentes por fatores humano, viário, veicular, adverso com a comparação das taxas de acidentes e o Índice proativo de Classificação de Desempenho Funcional, permitindo um melhor conhecimento dos segmentos homogêneos e críticos e uma avaliação da qualificação adimensional. Em especial foi realizada a investigação mais profícua da interseção entre os fatores humano e viário com a função de conhecer a participação nos segmentos selecionados. Destaca-se que a análise foi fundamentada no banco de dados de acidentes Datatran-2015, na pesquisa entre profissionais de engenharia sobre os subfatores físicos e ambientais, no estudo dos motivos contribuintes do acidente, no levantamento da estrutura viária, na velocidade e relevo, com a definição da Escala Classificatória tomando por base a avaliação do nível de serviço dos segmentos através do ajuste do volume de trafego na aplicação do método de verificação da capacidade HCM 2010. Como ferramenta complementar, o Método Experimental serve ao Gestor Operacional como um auxílio no conhecimento do perfil da malha rodoviária, servindo na elaboração das intervenções operacionais para a redução do risco e nas definições da Segurança Viária.The physical and environmental characteristics of the rural highways of simple track performance determine functional conditions, which contribute to the assessment of the road factor and your influence on road safety through the proposal of a Classification Indicator. This procedure provides a higher or lower risk profile, as a proactive role, in order to confront it with the reactive index of accidents and critical accident rate, allowing better analysis of critical and homogeneous segments. An Experimental Method was applied involving the evaluation of the sub-factors and the variable influx of traffic volume, as a defining element of the highway capacity. In order to carry out case studies on BR-153 and BR-476/PR, it was adopted an evaluation with the Venn Diagram on the grouping of the accidents caused by human, road, vehicular and adverse factors, in comparison with the accident rates and the Functional Performance Rating Index. This allows a better understanding of the critical and homogeneous segments and a dimensionless qualification assessment. In particular, the more fruitful investigation of the intersection between human and road factors in order to know their role in the selected segments. It is important to point out that the analysis was based on the accidents database Datatran-2015, on a research with engineering professionals about the physical and environmental sub-factors, the study of the contributing factors, on the road structure raising, speed and terrain. This was followed by the definition of the Qualifying Scale based on the evaluation of the service level of the segments by adjusting the traffic volume in the application of the capacity verification method HCM 2010. As a complementary tool, the Experimental Method serves the Operational Manager as a support in the knowledge of the highway network profile, being used in operational interventions for reducing the risk and in the definitions of road safety

TWO METHODS FOR TREE VOLUME ESTIMATION OF Acacia melanoxylon IN PORTUGAL

AbstractTwo models were developed to evaluate total volume under and over-bark of Blackwood (Acacia melanoxylon R. Br.) stand trees. By variance analysis regarding volume with and without bark it was confirmed that trees age is responsible for 48 to 50% of its volumetric behaviour. Considered the averages of those variables and regarding the three homogeneous groups of the studied sites, a single model type was used (v=β1dβ2hβ3) for estimating volumes. The critical errors are between 72 and 195 dm3 under-bark, and 82 and 212dm3 over-bark. The model that uses sites as dummy variables to the estimation of stand tree volumes is the same, and this method performs maximum expected errors with values of 155 dm3 (under-bark) and 169dm3 (over-bark), to mean maximum volumes of 1362 and 1459 dm3 respectively.The use of dummy variables is a more expedite and rapid modelling method, and its maximum expected errors perform lower values.Keywords: Blackwood; tree volume; modelling; ANOVA; dummy variables. ResumoDois métodos para estimar o volume em pé de árvores de Acacia melanoxylon em Portugal. Foram construídos dois modelos para estimar o volume sobre e sob casca de árvores em pé da acácia austrália (Acacia melanoxylon R. Br.). Por análise de variância do volume com e sem casca, foi confirmado que a idade das árvores é responsável por 48 a 50% do seu comportamento volumétrico. Consideradas as médias dessas variáveis e tendo em conta os três grupos homogêneos das “estações” estudadas, foi usado um único modelo tipo (v = β1dβ2hβ3) para estimar volumes. Os erros críticos situam-se entre 72 e 195 dm3 sobre casca, e 82 e 212 dm3 sob casca. O modelo que usa as “estações” como variáveis dummy para estimar volumes de árvores em pé é o mesmo e gera erros máximos esperados com valores de 155 dm3 (sob casca) e de 169 dm3 (sobre casca), para volumes máximos médios de 1362 e 1459 dm3, respectivamente. A utilização de variáveis dummy é um método de modelação rápido e mais expedito, e os seus valores de erros máximos esperados são inferiores.Palavras-chave: Austrália; volume de árvore; modelação; ANOVA; variáveis dummy.Two models were developed to evaluate total volume under and over-bark of Blackwood (Acacia melanoxylon R. Br.) stand trees. By variance analysis regarding volume with and without bark it was confirmed that trees age is responsible for 48 to 50% of its volumetric behaviour. Considered the averages of those variables and regarding the three homogeneous groups of the studied sites, a single model type was used (v=β1dβ2hβ3) for estimating volumes. The critical errors are between 72 and 195 dm3 under-bark, and 82 and 212dm3 over-bark. The model that uses sites as dummy variables to the estimation of stand tree volumes is the same, and this method performs maximum expected errors with values of 155 dm3 (under-bark) and 169dm3 (over-bark), to mean maximum volumes of 1362 and 1459 dm3 respectively.The use of dummy variables is a more expedite and rapid modelling method, and its maximum expected errors perform lower values

High Input of Nitrogen Fertilization and Short Irrigation Frequencies Forcefully Promote the Development of Verticillium Wilt of Olive

It is known that high N doses, N/K imbalances, and frequent irrigation favor Verticillium wilt. The influence of fertilization and its interaction with the frequency of irrigation on the development of Verticillium wilt of olive (VWO) has been evaluated. A split-split-plot design in microplots with two naturally infested soils of different texture was established for studying three fertilization treatments (NO3Ca, NPK and without fertilization), plus two irrigation frequencies (daily and deficit). The treatments were applied by means of fertigation, evaluating the susceptible cultivar Picual. Final disease incidence in plants subjected to NO3Ca daily treatment was 100% regardless of soil texture. However, final mortality in these plants was 37% and 85.2% in clay and sandy loam soils, respectively. In addition, the area under the disease progress curve values were significantly higher (49.1%) in plants subjected to NO3Ca fertilization compared to those not fertilized or fertilized with N-P-K when plants were grown in clay soil. This value in the sandy loam soil was significantly higher in the NO3Ca daily irrigation treatment (94.3%), followed by the N-P-K-daily treatment (61.1%) which also was significantly higher than the unfertilized daily, N-deficit and NPK-deficit treatments (37.8, 42.6 and 44.9%, respectively). The plants submitted to unfertilized-deficit treatment reached the lowest value (9.6%). In this work it can be concluded that the application of fertilizer or the application of fertilizer with daily irrigation in naturally infested soils increases the development of VWO in Picual

Desarrollando una metodología de análisis de riesgos para que el sector asegurador pueda tasar los riesgos en las PYMES

En una sociedad gobernada por la información, las empresas y en particular las PYMES, dependen cada vez más de la capacidad de poder asegurar la información, no solo internamente, sino con terceros que estén dispuestos a establecer pólizas de seguros sobre la información. Pero cuando estamos hablando de activos intangibles, las aseguradoras se enfrentan a la problemática de que no existen metodologías de Análisis de Riesgos adecuadas que permitan tasar y garantizar la información de forma objetiva. En este artículo, presentamos la base de una nueva metodología que tiene como objetivo dar solución a las problemáticas presentadas por las empresas y las aseguradoras, permitiendo realizar un análisis de riesgo con menor grado de incertidumbre que los existentes en la actualidad.Esta investigación es parte del proyecto PROMETEO financiado por la Secretaría Nacional de Educación Superior, Ciencia, Tecnología e Innovación (SENESCYT) del Gobierno de Ecuador, y el proyecto SIGMA-CC (Ministerio de Economía y Competitividad y el Fondo Europeo de Desarrollo Regional FEDER, TIN2012-36904)

Evaluating the emissions and performance of two dual-mode RCCI combustion strategies under the World Harmonized Vehicle Cycle (WHVC)

[EN] This work compares the emissions and performance of two dual-mode reactivity controlled compression ignition (RCCI) combustion strategies under the World Harmonized Vehicle Cycle (WHVC), a chassis dynamometer version of the World Harmonized Transient Cycle (WHTC) test proposed by the EURO VI emission regulation for heavy-duty engines. The major difference between the two dual-mode combustion strategies investigated is that, while one of them relies on covering with conventional diesel combustion (CDC) the part of the map that cannot be covered by RCCI regime (RCCI/CDC dual-mode), the other does it relying on dual-fuel diffusion combustion (dual-mode dual-fuel). The influence of the gear shifting strategy on the emissions and performance over the WHVC is discussed first. Later, both dual-mode concepts are compared considering the optimal gear shifting strategy. The results suggest that dual-mode dual-fuel concept allows reducing the specific fuel consumption by 7% in average versus RCCI/CDC concept. Moreover, NOx emissions are around 87% lower with dual mode dual-fuel, meeting the EURO VI requirements without the need for an SCR aftertreatment system. In counterpart, HC and CO emissions are near 2 and 10 times greater, respectively, for dual-mode dual fuel than for RCCI/CDC. (C) 2017 Elsevier Ltd. All rights reserved.The experimental results used in this work come from an investigation funded by VOLVO Group Trucks Technology. The authors also acknowledge the Spanish economy and competitiveness ministry for partially supporting this research (HiReCo TRA2014-58870-R). The author J. Monsalve-Serrano acknowledges the financial support from the Universitat Politecnica de Valencia under the Grant "Ayudas Para la Contratacion de Doctores para el Acceso al Sistema Espafiol de Ciencia, Tecnologia e InnovaciOn". The author Vinicius Ruckert Roso would like to acknowledge the financial support from CAPES in providing the necessary bursary and to the Universidade Federal de Santa Maria and Universidade Federal de Minas Gerais-Brazil by the financial support in acquiring the software licenses needed for this work.García Martínez, A.; Monsalve Serrano, J.; Roso, VR.; Santos Martins, ME. (2017). Evaluating the emissions and performance of two dual-mode RCCI combustion strategies under the World Harmonized Vehicle Cycle (WHVC). Energy Conversion and Management. 149:263-274. https://doi.org/10.1016/j.enconman.2017.07.034S26327414

The distribution and ecological effects of the introduced Pacific oyster Crassostrea gigas (Thunberg, 1793) in Northern Patagonia

In this work we studied the actual coverage, distribution patterns and ecologic effects of the introduced oyster Crassostrea gigas 20 y after their introduction to the Northern Argentinean Patagonia (Bahia Anegada; 39º50´S to 40º40´S and 61º59 to 62º28 W). Using satellite imagery and field and aerial inspections we found 10 oyster beds that cover less than 0.05% of the bay intertidal (area covered: 36.45 ha). These beds are restricted to intertidal zones with superficial hard substrata (limestone outcrops). Most epifaunal organisms (the crabs Cyrtagrapsus angulatus, Chasmagnathus granulatus, the isopod Melita palmata. and the snail Heleobia australis) showed higher densities inside oyster beds compared with outside and experiments showed that artificially deployed oyster beds increased the densities of their at three intertidal zones (high intertidal marsh, low intertidal marsh. and low intertidal with hard substrata) and also increased densities of infaunal organisms (the polychaetes Laeonereis acuta, Nepthys fluviatilis, and the priapulid Priapulus tuberculatospinosus) at the low intertidal with hard substrata. This may be the result of increasing habitat structure and refuge for epifaunal organisms, and enhancement of deposition and sediment stability that may benefit infaunal organisms. Densities bird species (Local species: Larus dominicanus, Haematopus palliatits: Regional migratory shorebird: Charadrius falklandicus; Long range migratory shorebirds: Pluvialis dominica, Calidris canutus, Tringa flavipes) were higher inside oyster beds compared with similar zones without oysters, which may be the result of higher prey availability. Foraging rate was also higher for some of these species (P. dominica, C. falklandicus). However, due to the limited availability of hard substratum the distribution of oysters is small. In conclusion, no negative effects were observed as a result of this introduction. There was an increase in species abundance and the area was preferred by local and migratory bird species, which also showed higher feeding rates.Fil: Escapa, Carlos Mauricio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Nacional de Mar del Plata; ArgentinaFil: Isacch, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata; ArgentinaFil: Daleo, Pedro. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata; ArgentinaFil: Alberti, Juan. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata; ArgentinaFil: Iribarne, Oscar Osvaldo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata; ArgentinaFil: Borges, Mónica Elisa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; ArgentinaFil: Dos Santos, Eder Paulo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; ArgentinaFil: Gagliardini, Domingo Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Lasta, Mario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Subsede Instituto Nacional de Investigación y Desarrollo Pesquero; Argentin

TURISMO NO ESPAÇO RURAL: DEBATE E TENDÊNCIA

Tourism in rural space is a tourism modality which has lately been the focus of investitors and students. However there has been little spread of studies focusing such modality, featuring the characteristics of te industry to which it belongs, showing up-to-date discussions and world trends. So, this study, concerned as it is with it, has gathered information on such points and shows that, worldwidely, tourism in rural space is an alternative modality that arose in counter-position to mass tourism, has been seen as a solution to poorer regions and, because of this, has been the aim of many investitors and students. The industry to which it belongs features characteristics like the complementarity of the segments that make it up and due to this it demands a different management style. By the problems raised, one believes that the essential question concerning tourism in rural space in the world is the lack of knowledge, both on behalf of the agents in dealing with the characteristics of the rural environment and the rural producers’ behalf in dealing with the characteristics of the tourism industry. The cluster, due to its characteristics, is the most adequate form to the characteristics of the tourism industry and especifically to tourism in rural space, which demands integration, coordination and cooperation. Once organized that way, tourism in rural space may come to smoothen problems said to be of regional under-development and de-valorization of small and medium rural enterprises that exist worldwide.tourism industry, tourism in rural space, rural sector, Community/Rural/Urban Development,

Vista de proceso del enfoque integrado de procesamiento de flujos de datos centrado en metadatos de mediciones

El enfoque integrado de procesamiento de flujos de datos centrado en metadatos de mediciones, es un gestor de flujos de datos sustentado en un marco de medición y evaluación, el cual incorpora comportamiento detectivo y predictivo, mediante el empleo de las mediciones y metadatos asociados. Este trabajo discute la formalización de los procesos asociados con el funcionamiento del gestor de flujos de datos, como así también la interacción entre ellos. La formalización de los procesos se realiza en base a SPEM, y se consideran las actividades comprendidas entre la configuración de las fuentes de datos involucradas en un proceso de medición y evaluación, hasta aquellas asociadas con la emisión de las alarmas detectivas o predictivas. Esto permite hacer comunicable el aspecto de procesos del enfoque, y adicionalmente, abre la posibilidad para medir y evaluar los propios procesos formalizados del enfoque, como medio para monitorear cuantitativamente su salud funcional en línea.Sociedad Argentina de Informática e Investigación Operativa (SADIO

Integrando enfoques de medición y evaluación con minería de datos y procesamiento de flujos

Este línea de trabajo aborda la problemática de los modelos de clasificación aplicados a flujos continuos de datos, variantes en el tiempo y semi-estructurados (según se define en [1]), usando el marco conceptual de medición y evaluación C-INCAMI (Context - Information Need, Concept model, Attribute, Metric and Indicator [2,3]). Esta investigación integra ambos enfoques, con el fin de generar y soportar un modelo de decisión adaptable al vuelo, que a su vez contribuya al proceso de toma de decisiones en diferentes contextos.Eje: Ingeniería de Software y Bases de DatosRed de Universidades con Carreras en Informática (RedUNCI