Semantically enhancing multimedia lifelog events

Lifelogging is the digital recording of our everyday behaviour in order to identify human activities and build applications that support daily life. Lifelogs represent a unique form of personal multimedia content in that they are temporal, synchronised, multi-modal and composed of multiple media. Analysing lifelogs with a view to supporting content-based access, presents many challenges. These include the integration of heterogeneous input streams from different sensors, structuring a lifelog into events, representing events, and interpreting and understanding lifelogs. In this paper we demonstrate the potential of semantic web technologies for analysing lifelogs by automatically augmenting descriptions of lifelog events. We report on experiments and demonstrate how our re- sults yield rich descriptions of multi-modal, multimedia lifelog content, opening up even greater possibilities for managing and using lifelogs

Selectivity of metribuzin in postemergence of culture of carrot

A citação dos autores está incorreto.The initial slow growth and short stature of carrot can allow that weeds settle in crop areas, requiring the management of these plants for productivity not to decrease. Nevertheless, weeds control has been difficult because there are few herbicides available for weeds control in postemergence of carrots. Two experiments in the field were carried out to evaluate selectivity of metribuzin applied in postemergence of carrots. A experimental randomized block design was utilized with four repetitions. Treatments consisted of metribuzin doses (0, 144, 288, 432, 576, 720, 960 and 1,200 g ha-1), applied in postemergence of carrots of the Nantes variety. Roots productivity was evaluated and percentage of commercial roots and no-commercial roots was calculated. Metribuzin has not caused visual symptoms of intoxication in carrots. Doses lower than 432 g ha-1 of metribuzin do not reduce the total productivity of roots, independent of the application period. Any doses of metribuzin changed the percentage of commercial and noncommercial roots. It is concluded that metribuzin is selective for carrots of the Nantes variety in postemergence applications at doses of 432 g ha-1.O lento crescimento inicial da cenoura favorece o estabelecimento de plantas daninhas nas áreas de cultivo, sendo necessário o manejo dessas plantas para que não ocorra redução da produtividade. Todavia, o controle tem sido dificultado por existirem poucas opções de herbicidas para o controle de plantas daninhas em pós-emergência da cultura. Dois experimentos de campo foram realizados para avaliar a seletividade do metribuzin aplicado em pós-emergência da cenoura, em dois diferentes períodos de cultivo (inverno e inverno-verão). O delineamento experimental foi o de blocos casualizados com quatro repetições. Os tratamentos corresponderam à aplicação de 0, 144, 288, 432, 576, 720, 960 e 1.200 g ha-1 do metribuzin na cultura da cenoura, cultivar Nantes. Foram avaliadas a produtividade total de raízes e a porcentagem de raízes comerciais e não comerciais. A produtividade total de raízes de cenoura não foi alterada pela aplicação de metribuzin até a dose de 432 g ha-1, independentemente da época de cultivo. A porcentagem de cenouras comercializáveis e descartáveis não foi alterada pelas doses do herbicida. Conclui-se que o metribuzin é seletivo para aplicação em pós-emergência da cenoura, cultivar Nantes, até a dose de 432 g ha-1

Cryopreservation of collared peccary (Pecari tajacu) semen using different freezing curves, straw sizes, and thawing rates

AbstractThe objective of this study was to verify the effect of different freezing curves, straw sizes, and thawing rates on the cryopreservation of collared peccary semen. Twelve ejaculates were obtained from captive adult males by electroejaculation, and evaluated for sperm motility, kinetic rating, viability, morphology, and functional membrane integrity. The ejaculates were diluted in a coconut water extender (ACP-116c) with egg yolk and glycerol, packaged into 0.25mL or 0.50mL plastic straws and cryopreserved in liquid nitrogen following a slow (−10°C/min) or a fast (−40°C/min) freezing curve. After one week, samples were thawed at 37°C/1min or 70°C/8s and evaluated as reported for fresh semen, and also for kinematic parameters (computerized analysis). A significant decrease in sperm motility and kinetic rating was observed after glycerol addition at 5°C and also after thawing for all the treatments (P<0.05). Regarding post-thaw semen variables, no differences were verified between freezing curves when the same straw size and thawing rate were taken as reference (P>0.05). In general, values for sperm characteristics found after thawing at 37°C were better preserved than at 70°C (P<0.05), both in the use of 0.25mL or 0.50mL straws, which were similar for semen packaging (P>0.05). The evaluation of the kinematic parameters of sperm motility confirmed these results at values varying from 20% to 30% motile sperm for the samples thawed at 37°C, and values fewer than 12% motile sperm for samples thawed at 70°C (P<0.05). In conclusion, we recommend the use of a fast freezing curve that reduces the time spent on the cryopreservation of collared peccary semen, which could be packaged both in 0.25mL or 0.50mL straws, but the thawing should be conducted at 37°C/1min

Process control in flavour generation : NIR-MVA as a tool to monitor key odorants formation

info:eu-repo/semantics/publishedVersio

Agricultural nitrogen impacts on aquatic ecosystems

[ES] El desarrollo de la actividad agrícola intensiva de regadío en la segunda mitad del siglo XX, en España pero también en Europa y a nivel global, ha producido que las aguas superficiales y subterráneas se hayan visto sometidas a diversos tipos de estrés. Uno de los más importantes es su estado cualitativo, en el que la lixiviación del exceso de fertilizantes nitrogenados aplicados a los campos agrícolas es el principal mecanismo responsable de las elevadas concentraciones de nitratos medidas en las aguas subterráneas, superiores al límite máximo permitido y recomendado por la legislación existente. Los elevados tiempos de tránsito que normalmente presentan los sistemas acuíferos y su baja capacidad para atenuar la contaminación hacen que éstos se comporten como un almacén de nitrógeno. La exportación del mismo a través del drenaje superficial por su conexión hídrica con cuerpos de agua superficiales constituye el principal mecanismo de contaminación por nitratos de ríos, lagos, mares y océanos. Esas elevadas concentraciones producen problemas de tipo ambiental, como la progresiva eutrofización de sus aguas, así como riesgos para la salud humana, como la enfermedad del “bebe azul”. Para lograr la recuperación de los sistemas y alcanzar el buen estado ecológico de las masas de agua superficiales y subterráneas, se hace necesario el estudio exhaustivo de su funcionamiento hídrico y del origen, el destino y los procesos de transformación a los que es sometido el nitrógeno.[EN] Groundwater and surface water bodies have been affected to various stress types since the second half of the twentieth century due to the development of intensive agricultural irrigation activities not only in Spain but also in Europe and globally. Leaching of nitrogen from fertilizers applied to agricultural fields affects the qualitative state of groundwater resources, due to the high nitrate concentrations measured in this water bodies, above the maximum allowable limit. Groundwater acts as a long-term sink for nitrate due to the high transit times and low remediation capacity to mitigate pollution. Nitrogen exportation through the discharge to surface water bodies is the main mechanism of nitrate pollution of rivers, lakes, seas and oceans. High nitrate concentrations cause environmental issues such as the progressive water eutrophication and human health risks (>blue baby> disease). To achieve good ecological status of water bodies is necessary the comprehensive study of the conceptual model, taking into account the hydric behavior and the source, fate and its transformation processes of the nitrogen cycle.Peer Reviewe

The Surface Texturing of Monocrystalline Silicon with NH4OH and Ion Implantation for Applications in Solar Cells Compatible with CMOS Technology

AbstractThis work presents the development of photovoltaic cells based on p+/n junction in Si substrates, aimed at compatibility with fabrication processes with CMOS technology. The compatible processes, which are developed in this study, are the techniques:i) Si surface texturing, with the textured surface reflection of 15% obtained by the formation of micro-pyramids (heights between 3 and 7μm) using NH4OH (ammonium hydroxide) alkaline solution, which is free of undesirable contamination by Na+ and K+ ions, when NaOH and KOH traditional solutions are used, respectively, and ii) of the ECR-CVD (ElectronCyclotron Resonance - Chemical Vapor Deposition) deposition of SiNx (silicon nitride) anti-reflective coating (ARC), which is carried out at room temperature and can be performed after the end of cell fabrication without damage on metallic tracks and without variation of p+/n junction depth. The ARC coating characterization presented that the silicon nitride has a refractive index of 1.92 and a minimum reflectance of 1.03%, which is an excellent result for application in solar (or photovoltaic) cells. For the formation of the pn junction was used ion implantation process with 11B+, E=20KeV, dose of 1x1015cm2 and four rotations of 90° to get uniformity on texturized surfaces