A CSM-BASED PROCEDURE FOR IDENTIFYING SEGMENTS OF AGRICULTURAL DRAINAGE DITCHES TO BE PRIORITIZED IN MAINTENANCE WORK

Productive agricultural land is vital for food production. To help secure the productivity of drained agricultural soils, diches need to be intermittently maintained. Maintenance work is costly, however, so ditch segments in most need of maintenance should be prioritized. Here, we present a procedure for identifying drainage ditch segments likely to need maintenance based on susceptibility to soil erosion by water flowing in the ditch, evaluated using a cohesive strength meter (CSM). An important part of the procedure is to relate the pressure of the CSM jets to pressures acting on the soil. The relationship between CSM jet pressure and pressures at the soil surface was established based on measurements made with a pressure sensor plate and was applied to obtain several values for pressure at the surface, which were used in turn to estimate critical shear stress for erosion. The results showed that the CSM-based method was able to identify differences in critical shear stress for erosion for different field soils. This information can be useful in identifying drainage ditch segments that should be prioritized for maintenance work

ANÁLISIS Y DISEÑO DE UNA SOLUCIÓN PARA LA GESTIÓN DE LA CADENA DE DISTRIBUCIÓN

Canal de distribución es el circuito a través del cual los fabricantes ponen a disposición de los consumidores los productos o servicios para que los adquieran. La separación geográfica entre compradores y vendedores, la imposibilidad de situar la fábrica frente al consumidor, hace necesario el traslado de bienes y servicios desde su lugar de producción hasta el Cliente. Editorial Vistazo tiene como modelo de negocio, la comercialización de las diferentes revistas, a través de una red de intermediarios minoristas y mayoristas, actualmente este proceso es lento, presentando una serie de inconvenientes. De acuerdo a lo mencionado, se determinó la importancia de mejorar y optimizar la cadena de distribución de la Editorial Vistazo, con la creación de una aplicación web que mejore la comercialización entre la Editorial y sus intermediaros para lograr un objetivo en común, que es, satisfacer al consumidor final.Distribution channel is the circuit through which the manufacturers provide consumer products or services for purchase. The geographical separation between buyers and sellers, the inability to locate the factory to the consumer, necessitates the transfer of goods and services from production site to the customer. Editorial Vistazo has as a business model, merchandising of various magazines, through a network of retail and wholesale brokers, currently this process is slow, presenting a number of drawbacks. According to the above, is mandatory to improve and optimize the distribution chain of the Editorial Vistazo, creating a web application that improves merchandising between the Publisher and its intermediaries to achieve a common goal, which is determined, satisfy the end consumer

“Infantes pos sus derechos”enseñanza en derechos humanos en Preescolar en los municipios de Apulo, Jerusalen, Tocaima y Viota.

Identificar las técnicas y estrategias pedagógicas utilizadas para la enseñanza de los derechos humanos en los niños de preescolar de las escuelas públicas urbanas en los municipios de Apulo, Jerusalén, Tocaima y ViotàEl presente proyecto busca hacer un rastreo de las técnicas y estrategias pedagógicas utilizadas en las educación infantil en derechos humanos en los colegios oficiales de los municipios de Apulo, Jerusalén, Tocaima y Viotà haciendo aportes en este tema a las diferentes líneas de trabajo del semillero de investigación “Infantes por sus derechos” y al grupo de maestros investigadores de la Secretaria de Educación de Cundinamarca integrados por los docentes: Orlando Cortes Sánchez (I.E.D Antonio Nariño de Apulo), Hermes Lamprea Montes (I.E.D Nacionalizado de Jerusalen), Maryury Santamaría Linares (I.E.D Hernán Venegas Carrillo de Tocaima) y Faiber Cortès Sánchez (I.E.D Francisco José Caldas de Viotà) quienes trabajaron también en este proyecto y con la información obtenida proponen unos talleres educativo

Expression of Tas1 Taste Receptors in Mammalian Spermatozoa: Functional Role of Tas1r1 in Regulating Basal Ca2+ and cAMP Concentrations in Spermatozoa

Background: During their transit through the female genital tract, sperm have to recognize and discriminate numerous chemical compounds. However, our current knowledge of the molecular identity of appropriate chemosensory receptor proteins in sperm is still rudimentary. Considering that members of the Tas1r family of taste receptors are able to discriminate between a broad diversity of hydrophilic chemosensory substances, the expression of taste receptors in mammalian spermatozoa was examined. Methodology/Principal Findings: The present manuscript documents that Tas1r1 and Tas1r3, which form the functional receptor for monosodium glutamate (umami) in taste buds on the tongue, are expressed in murine and human spermatozoa, where their localization is restricted to distinct segments of the flagellum and the acrosomal cap of the sperm head. Employing a Tas1r1-deficient mCherry reporter mouse strain, we found that Tas1r1 gene deletion resulted in spermatogenic abnormalities. In addition, a significant increase in spontaneous acrosomal reaction was observed in Tas1r1 null mutant sperm whereas acrosomal secretion triggered by isolated zona pellucida or the Ca2+ ionophore A23187 was not different from wild-type spermatozoa. Remarkably, cytosolic Ca2+ levels in freshly isolated Tas1r1-deficient sperm were significantly higher compared to wild-type cells. Moreover, a significantly higher basal cAMP concentration was detected in freshly isolated Tas1r1-deficient epididymal spermatozoa, whereas upon inhibition of phosphodiesterase or sperm capacitation, the amount of cAMP was not different between both genotypes. Conclusions/Significance: Since Ca2+ and cAMP control fundamental processes during the sequential process of fertilization, we propose that the identified taste receptors and coupled signaling cascades keep sperm in a chronically quiescent state until they arrive in the vicinity of the egg - either by constitutive receptor activity and/or by tonic receptor activation by gradients of diverse chemical compounds in different compartments of the female reproductive tract

Effect of Vegetation Removal on Soil Erosion and Bank Stability in Agricultural Drainage Ditches

Maintenance of agricultural drainage ditches can be difficult to optimize if farmers have no guidelines on where to target their maintenance efforts. A main concern is whether ditch banks will experience soil erosion or mass movement (failure). In order to help identify sites that are more likely to experience soil erosion and/or mass movement, soil susceptibility to detachment was assessed in this study using a cohesive strength meter (CSM) and measurements of shear strength in unsaturated direct shear tests. The results showed that soil roots play an important role in stabilizing ditch banks against mass movement and in reducing the rate of soil detachment. A positive stabilizing effect was detected by CSM and confirmed by shear strength measurements. The conclusion is that native vegetation should be maintained on ditch banks, instead of being removed during maintenance work as is currently the case

Análisis y diseño de una solución para la gestión de la cadena de distribución

La presente aplicación establece una metodología a seguir para la ejecución correcta de los canales de distribución. Hemos tomado como caso en particular la compañía del sector de la industria offset, Vistazo Guayaquil. Vistazo necesita automatizar el proceso de la distribución delas diferentes revistas de su catálogo comercial, ya que actualmente se maneja un proceso muy lento y por ende muy costoso para la toma de pedidos y la entrega de los mismos. se requiere una aplicación móvil para la toma de pedidos, su entrega y su facturación, con lo cual vistazo podrá optimizar sus costos y tiempos de entrega.GuayaquilLicenciado en Sistemas de Informació

The use of spectrograms improves the classification of wheezes and crackles in an educational setting

Chest auscultation is a widely used method in the diagnosis of lung diseases. However, the interpretation of lung sounds is a subjective task and disagreements arise. New technological developments like the use of visSual representation of sounds through spectrograms could improve the agreement when classifying lung sounds, but this is not yet known. In this study, we tested if the use of spectrograms improves the agreement when classifying wheezes and crackles. To do this, we asked twenty-three medical students at UiT the Arctic University of Norway to classify 30 lung sounds recordings for the presence of wheezes and crackles. The sample contained 15 normal recordings and 15 with wheezes or crackles. The students classified the recordings in a random order twice. First sound only, then sound with spectrograms. We calculated kappa values for the agreement between each student and the expert classification with and without display of spectrograms and tested for significant improvement between these two coefficients. We also calculated Fleiss kappa for the 23 observers with and without the spectrogram. In an individual analysis comparing each student to an expert annotated reference standard we found that 13 out of 23 students had a positive change in kappa when classifying wheezes with the help of spectrograms. When classifying crackles 16 out of 23 showed improvement when spectrograms were used. In a group analysis we observed that Fleiss kappa values were k = 0.51 and k = 0.56 (p = 0.63) for classifying wheezes without and with spectrograms. For crackles, these values were k = 0.22 and k = 0.40 (p = <0.01) in the same order. Thus, we conclude that the use of spectrograms had a positive impact on the inter-rater agreement and the agreement with experts. We observed a higher improvement in the classification of crackles compared to wheezes

Marine and Maritime Intelligent Robotics (MIR)

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