A contra-rotating marine current turbine on a flexible mooring : development of a scaled prototype

The contra-rotating marine current turbine concept developed by the Energy Systems Research Unit at the University of Strathclyde is aimed at extracting energy in a wide range of water depths by 'flying' a neutrally-buoyant device from a flexible, tensioned mooring. After successful proof of concept turbine trials, the development programme has moved on to investigate the performance of a scaled prototype of the complete system incorporating the turbine, submersible contra-rotating generator and mooring. The turbine/generator assembly has been tested in a towing tank, and the entire system is now undergoing sea trials. An investigation into turbine wake development (an area in which it is hoped that the contra-rotating turbine will have uniquely beneficial properties) has recently begun. Small single-rotor model turbines have been deployed in a flume. Trends observed so far are in accordance with those observed by other researchers

Percussion Ensemble 2016 Fall Concert

Kennesaw State University Percussion Ensemble, led by director John Lawless, performs an exciting program of repertoire for various groupings of percussion instruments and players.https://digitalcommons.kennesaw.edu/musicprograms/1786/thumbnail.jp

Archeological Survey of the Chalupa Wind Project - Arroyo Colorado Transmission Line Crossing Cameron County, Texas

Between December 3 and 8, 2018, Blanton & Associates, Inc. (B&A), on behalf of La Chalupa, LLC, conducted an archeological survey within the proposed Chalupa Wind Project - Arroyo Colorado Transmission Line Crossing (the Project), in Cameron County, Texas. The proposed overhead transmission line would be approximately 10.4 miles in length, 1.7 miles of which would be located on property owned by the Port of Harlingen Authority, a political subdivision of State, triggering compliance with the Antiquities Code of Texas and associated regulations outlined in 13 TAC 26. The project would also require a federal permit to be issued under the auspices of Section 10 of the Rivers and Harbors Act of 1899, which will require compliance with Section 106 of the National Historic Preservation Act and associated regulations outlined in 36 CFR 800. The project area consists of approximately 20.45 total acres. Twelve trenches were excavated in connection with this investigation. No archeological sites were identified. Based on these findings, B&A recommends that the proposed project proceed to completion without further archeological work. Curation of records generated in connection with this survey occurred at the University of Texas San Antonio’s Center for Archaeological Research

The ferroelectric Mott-Hubbard phase of organic (TMTTF)2X conductors

We present experimental evidences for a ferro-electric transition in the family of quasi one- dimensional conductors (TMTTF)2X. We interpret this new transition in the frame of the combined Mott-Hubbard state taking into account the double action of the spontaneous charge disproportionation on the TMTTF molecular stacks and of the X anionic potentials

Revisión de la literatura sobre el uso del aprendizaje profundo enfocado en sistemas de inspección ópticos automatizados para la detección de defectos superficiales en el sector de la manufactura

The manufacturing industry uses supervised machine learning methodologies to improve inspection processes through machine vision. Automated optical inspection offers efficiency in the inspection process for the detection of defects in the manufacture of various products. This work contributes with the identification of those limitations in data processing based on defined rule sets and process domain management. A literature review is proposed on the use of deep learning focused on automated optical inspection systems for the detection of surface defects in the manufacturing sector. The proposed objective is to identify the different architectures oriented on convolutional neural networks applied in optical inspection systems to automate the extraction of features or patterns. By means of the exploration of relevant works, a total of 47 selected papers that address generalization problems and optimization techniques are identified. Finally, the information of the different architectures is contrasted for the elaboration of a comparative table that evidence improvements in the accuracy of the optical inspection systems by means of the percentage achieved. These results contribute as an input to the existing body of literature for improvements in the manufacturing sector.El sector de la manufactura utiliza metodologías de aprendizaje automático supervisado que permiten mejorar procesos de inspección mediante la visión artificial. La inspección óptica automatizada ofrece eficiencia en el proceso de inspección para la detección de defectos en la fabricación de diversos productos. Este trabajo aporta con la identificación de aquellas limitaciones en el procesamiento de datos basados en el conjunto de reglas definidas y la gestión del dominio del proceso. Se propone una revisión de literatura sobre el uso del aprendizaje profundo enfocado a los sistemas de inspección ópticos automatizados para la detección de defectos superficiales en el sector de la manufactura. El objetivo propuesto es de identificar las diferentes arquitecturas orientadas en redes neuronales convolucionales aplicadas en sistemas de inspección óptico con el fin de automatizar la extracción de características o patrones. Por medio de la exploración de trabajos relevantes se permite identificar un total de 47 documentos seleccionados que abordan los problemas de generalización y técnicas de optimización, finalmente se contrasta la información de las diferentes arquitecturas para la elaboración de una tabla comparativa que evidencia mejoras en la precisión de los sistemas de inspección óptico mediante el porcentaje alcanzado. Estos resultados contribuyen como un insumo al conjunto de literatura existente para mejoras al sector de la manufactura

Evaluación de dos pabellones considerando los efectos de interacción Tabique - Pórtico y columna corta de la I.E. 40230 “San Antonio del Pedregal", ubicado en el distrito de Majes, provincia de Caylloma, Arequipa

En la presente tesis de investigación se detalla el análisis estructural de una institución educativa que se encuentra ubicada en el distrito de Majes, provincia de Caylloma Arequipa; “San Antonio del Pedregal”, teniendo como objetivo principal el análisis y la evaluación de los efectos entre la interacción tabique-pórtico y columna corta que presentan este tipo de edificaciones para brindar soluciones optimas que permitan mejorar el comportamiento estructural de la edificación destinada a educación, ya que en la norma técnica peruana los clasifica como edificación esencial y debería mantenerse de pie ante un sismo de gran magnitud. En el proceso de análisis se llevaron a cabo las inspecciones de campo con pruebas técnicas no destructivas para determinar las características geométricas, físicas y mecánicas de los elementos estructurales y así poder evaluar mediante un modelo matemático el comportamiento sísmico de la estructura, asimismo verificar los tipos de fallas o efectos desfavorables que pueda presentar esta edificación. Los datos obtenidos son desarrollados y resueltos en el programa de modelamiento ETABS V20.1, determinando las deformaciones de pórticos, la resistencia al corte de la albañilería, verificando el comportamiento del muro al remplazarlo por un puntal equivalente teniendo en cuenta el aplastamiento, tracción diagonal y cizalle, asimismo se analizó los muros que forman las columnas cortas para verificar la concentración de las fuerzas internas (cortantes y momentos) en las porciones libre y restringidas por la tabiquería. Luego de analizar los resultados al realizar todas las verificaciones correspondientes, se plantea un reforzamiento en la edificación para tener una mejor respuesta ante un movimiento sísmico, con respecto a las patologías de columna corta se decidió aislar la tabiquería de la superestructura para no comprometer a las columnas, además se consideró un encamisado de la columna, incrementando el peralte y convirtiéndola en columna T, esta consideración nos permitió cumplir con los desplazamientos de piso. Finalmente, se pudo demostrar que las deformaciones de los pórticos en las zonas arriostradas en función a los desplazamientos y cortantes presentan un incremento de hasta 4 veces el cortante que en las zonas de columna cortThis research thesis details the structural analysis of an educational institution located in the district of Majes, province of Caylloma Arequipa; ""San Antonio del Pedregal"", having as main objective the analysis and evaluation of the effects between the partition-portico and short column interaction of this type of buildings to provide optimal solutions to improve the structural behavior of the building intended for education, since the Peruvian technical standard classifies them as essential building and should remain standing in an earthquake of great magnitude. In the analysis process, field inspections were carried out with non-destructive technical tests to determine the geometric, physical and mechanical characteristics of the structural elements in order to evaluate the seismic behavior of the structure through a mathematical model, as well as to verify the types of failures or unfavorable effects that this building may present. The data obtained are developed and solved in the ETABS V20.1 modeling program, determining the deformations of frames, the shear resistance of the masonry, verifying the behavior of the wall when replacing it with an equivalent prop taking into account the crushing, diagonal tension and shear, also the walls that form the short columns were analyzed to verify the concentration of internal forces (shear and moments) in the free and restricted portions by the partition walls. After analyzing the results and performing all the corresponding verifications, a reinforcement of the building was proposed in order to have a better response to a seismic movement. With respect to the short column pathologies, it was decided to isolate the partition walls from the superstructure so as not to compromise the columns; in addition, a jacketing of the column was considered, increasing the camber and converting it into a T column. Finally, it was possible to demonstrate that the deformations of the portal frames in the braced zones in terms of displacements and shear forces show an increase of up to 4 times the shear force than in the short column zonesTesi