Influence of the amount of fine particles on rheological properties of uranium dioxide powders

International audienc

Analysis of the dynamics of the FT4 powder rheometer

Traditional powder flow measurement devices, such as shear cells, operate in the quasi-static regime of shear strain rate. The FT4 powder rheometer of Freeman Technology, developed over the last two decades, has provided a clearer differentiation of powder flowability in some instances. This has been attributed to the instrument operating in the dynamic regime of shear strain rates, a feature that has yet to be established. We report an analysis of the dynamic behaviour of a bed of glass beads made cohesive by silanisation and subjected to standard FT4 testing procedure, where a rotating blade is driven into a cylindrical bed, using a combination of experimental measurements and numerical simulations by the Distinct Element Method. The DEM analysis underestimates the flow energy measured experimentally, although the agreement is improved when sliding friction is increased. The shear stress of the powder in front of the blade is shown to be roughly constant along the radial direction and increasing as the impeller penetrates the bed, suggesting a characteristic shear stress can be determined for a powder under a given test conditions in the FT4. For ease of simulations large beads were used (1.7 – 2.1 mm). Future work will investigate the influence of particle properties and operational conditions on the prevailing stresses and strain rates

Food safety and the contract catering companies: food handlers, facilities and HACCP evaluation

The evaluation of implementing the HACCP system in contract catering companies and assessment of the knowledge, attitudes and practices of the food handlers were the main objectives of this study. It was conducted in 20 companies throughout Spain, with visual inspection of facilities and food handler activities, as well as the distribution of a self-administrable questionnaire among the 105 participant catering workers. In addition, samples of surfaces and finished dishes were taken from each kitchen for microbiological evaluation. The results obtained from the questionnaires reflect extensive knowledge and correct behaviors among respondents with a middle- or highschool educational level, stability in the same workplace and positions of greater responsibility. However, the observation of hygiene practices revealed systematic incorrect procedures in 60% of the kitchens. Most observed deviations were related to the lack of HACCP training and information, the temperature of finished dishes, the storage areas and proper cleaning and disinfection. In summary, this study confirms the difficulties inherent in catering companies to effectively implement the HACCP system, such as the lack of well-trained personnel, lack of motivation or adhesion to said system on the part of the workers, and the lack of financial and economic resources to address the deficiencies in the facilities. Specific educational programs and grants are need for an adequate implementation of HACCP in this sector

Aplicación móvil multiplataforma sensible al contexto para el turismo religioso en Santiago del Estero

Es una investigación aplicada que involucra estudios en el campo de la Ingeniería del Software para desarrollar una aplicación móvil multiplataforma sensible al contexto para el Turismo Religioso en la Provincia de Santiago del Estero, Argentina. La aplicación se basa en un modelo sistémico que permitirá a los diversos actores del turismo la gestión dinámica del contenido. La aplicación brindará al turista información en línea del entorno, sea cual fuere el SO de su dispositivo móvil; al resto de los actores del turismo (proveedores, guías, administradores de eventos e instalaciones turísticas, etc.) la aplicación les permitirá actualizar en línea la información de contexto. La investigación involucra el análisis comparativo de herramientas de desarrollo híbrido de aplicaciones móviles (PhoneGap, Ionic, Apache Córdoba), según criterios de reuso, versionado y manejo de bibliotecas de GPS para la sensibilidad al contexto. Además, se estudia la conectividad inalámbrica móvil en zonas rurales, abordando mecanismos alternativos de conectividad que aseguren el uso efectivo de las aplicaciones móviles en contextos rurales aislados (escasa conectividad y recursos energéticos limitados), típicos de los lugares donde se desarrollan importantes festividades religiosas santiagueñas.Eje: Ingeniería del Software.Red de Universidades con Carreras en Informátic

Catering services and HACCP: temperature assessment and surface hygiene control before and after audits and a specific training session

Proper application of HACCP in catering services involves monitoring decisive critical points. The purpose of this study was to assess food temperatures and surface hygiene control in two catering services in Navarra (Spain) at two different time periods: the first one after implementation of the HACCP system and the second period, after the initial supervision through audits and a specific training session regarding temperatures of products and hygienic conditions of surfaces and equipment because the majority of detected nonconformities were related to these parameters. The recorded temperatures of 650 cooked food products within the first period showed that only 65.1% of the hot dishes had a temperature higher than 65 °C, in accordance with Spanish legislation, and 12.9% of them showed a risky holding temperature (26%) compared to utensils for distribution (12.0%). As the impact of dirty surfaces on the hygienic quality of a finished product will depend on which step was being taken during dish elaboration when equipment or utensil was used, it is suggested that more restrictive limits be established regarding utensils and equipment that are in direct contact with the finished product (≤1 CFU/cm2). Results of the study demonstrate that a specific training session on these items has improved the temperature control of prepared meals and the effectiveness of cleaning and disinfection, essentials for guaranteeing the hygienic quality of prepared foods

Aplicación móvil multiplataforma sensible al contexto para el turismo religioso en Santiago del Estero

Es una investigación aplicada que involucra estudios en el campo de la Ingeniería del Software para desarrollar una aplicación móvil multiplataforma sensible al contexto para el Turismo Religioso en la Provincia de Santiago del Estero, Argentina. La aplicación se basa en un modelo sistémico que permitirá a los diversos actores del turismo la gestión dinámica del contenido. La aplicación brindará al turista información en línea del entorno, sea cual fuere el SO de su dispositivo móvil; al resto de los actores del turismo (proveedores, guías, administradores de eventos e instalaciones turísticas, etc.) la aplicación les permitirá actualizar en línea la información de contexto. La investigación involucra el análisis comparativo de herramientas de desarrollo híbrido de aplicaciones móviles (PhoneGap, Ionic, Apache Córdoba), según criterios de reuso, versionado y manejo de bibliotecas de GPS para la sensibilidad al contexto. Además, se estudia la conectividad inalámbrica móvil en zonas rurales, abordando mecanismos alternativos de conectividad que aseguren el uso efectivo de las aplicaciones móviles en contextos rurales aislados (escasa conectividad y recursos energéticos limitados), típicos de los lugares donde se desarrollan importantes festividades religiosas santiagueñas.Eje: Ingeniería del Software.Red de Universidades con Carreras en Informátic

Aplicación móvil multiplataforma sensible al contexto para el turismo religioso en Santiago del Estero

Es una investigación aplicada que involucra estudios en el campo de la Ingeniería del Software para desarrollar una aplicación móvil multiplataforma sensible al contexto para el Turismo Religioso en la Provincia de Santiago del Estero, Argentina. La aplicación se basa en un modelo sistémico que permitirá a los diversos actores del turismo la gestión dinámica del contenido. La aplicación brindará al turista información en línea del entorno, sea cual fuere el SO de su dispositivo móvil; al resto de los actores del turismo (proveedores, guías, administradores de eventos e instalaciones turísticas, etc.) la aplicación les permitirá actualizar en línea la información de contexto. La investigación involucra el análisis comparativo de herramientas de desarrollo híbrido de aplicaciones móviles (PhoneGap, Ionic, Apache Córdoba), según criterios de reuso, versionado y manejo de bibliotecas de GPS para la sensibilidad al contexto. Además, se estudia la conectividad inalámbrica móvil en zonas rurales, abordando mecanismos alternativos de conectividad que aseguren el uso efectivo de las aplicaciones móviles en contextos rurales aislados (escasa conectividad y recursos energéticos limitados), típicos de los lugares donde se desarrollan importantes festividades religiosas santiagueñas.Eje: Ingeniería del Software.Red de Universidades con Carreras en Informátic

Language technologies for a multilingual Europe

This volume of the series “Translation and Multilingual Natural Language Processing” includes most of the papers presented at the Workshop “Language Technology for a Multilingual Europe”, held at the University of Hamburg on September 27, 2011 in the framework of the conference GSCL 2011 with the topic “Multilingual Resources and Multilingual Applications”, along with several additional contributions. In addition to an overview article on Machine Translation and two contributions on the European initiatives META-NET and Multilingual Web, the volume includes six full research articles. Our intention with this workshop was to bring together various groups concerned with the umbrella topics of multilingualism and language technology, especially multilingual technologies. This encompassed, on the one hand, representatives from research and development in the field of language technologies, and, on the other hand, users from diverse areas such as, among others, industry, administration and funding agencies. The Workshop “Language Technology for a Multilingual Europe” was co-organised by the two GSCL working groups “Text Technology” and “Machine Translation” (http://gscl.info) as well as by META-NET (http://www.meta-net.eu)

Language technologies for a multilingual Europe

This volume of the series “Translation and Multilingual Natural Language Processing” includes most of the papers presented at the Workshop “Language Technology for a Multilingual Europe”, held at the University of Hamburg on September 27, 2011 in the framework of the conference GSCL 2011 with the topic “Multilingual Resources and Multilingual Applications”, along with several additional contributions. In addition to an overview article on Machine Translation and two contributions on the European initiatives META-NET and Multilingual Web, the volume includes six full research articles. Our intention with this workshop was to bring together various groups concerned with the umbrella topics of multilingualism and language technology, especially multilingual technologies. This encompassed, on the one hand, representatives from research and development in the field of language technologies, and, on the other hand, users from diverse areas such as, among others, industry, administration and funding agencies. The Workshop “Language Technology for a Multilingual Europe” was co-organised by the two GSCL working groups “Text Technology” and “Machine Translation” (http://gscl.info) as well as by META-NET (http://www.meta-net.eu)

Language technologies for a multilingual Europe

This volume of the series “Translation and Multilingual Natural Language Processing” includes most of the papers presented at the Workshop “Language Technology for a Multilingual Europe”, held at the University of Hamburg on September 27, 2011 in the framework of the conference GSCL 2011 with the topic “Multilingual Resources and Multilingual Applications”, along with several additional contributions. In addition to an overview article on Machine Translation and two contributions on the European initiatives META-NET and Multilingual Web, the volume includes six full research articles. Our intention with this workshop was to bring together various groups concerned with the umbrella topics of multilingualism and language technology, especially multilingual technologies. This encompassed, on the one hand, representatives from research and development in the field of language technologies, and, on the other hand, users from diverse areas such as, among others, industry, administration and funding agencies. The Workshop “Language Technology for a Multilingual Europe” was co-organised by the two GSCL working groups “Text Technology” and “Machine Translation” (http://gscl.info) as well as by META-NET (http://www.meta-net.eu)