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Muhammad Subri - One of the best experts on this subject based on the ideXlab platform.
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Preparation and Characterization of Porous Ceramic Membranes for Micro-Filtration from Clay/CuZn Using Extrusion Methods
MATEC Web of Conferences, 2018Co-Authors: Muh Amin, Muhammad SubriAbstract:In this study, fabrication and characterization of ceramic membranes preparation was carried out. Porous ceramic membranes were fabricated by extrusion process from different percentage composition of CuZn on (80 wt% Clay, 10 wt% TiO 2 , 5 wt% Carbon and 5 wt% PVA). The fabricated membranes were sintered at 900°C for 1 hour in an Electrical Box furnace with heating rate 1oC/min and holding time for 1 hour. Apparent density and porosity were determined by standar methods for ceramic materials. Phase composition of the ceramic support was established by X-Ray Diffraction analysis. SEM studies of the membranes added at different CuZn were carried out.
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preparation and characterization of porous ceramic membranes for micro filtration from clay cuzn using extrusion methods
MATEC Web of Conferences, 2018Co-Authors: Muh Ami, Muhammad SubriAbstract:In this study, fabrication and characterization of ceramic membranes preparation was carried out. Porous ceramic membranes were fabricated by extrusion process from different percentage composition of CuZn on (80 wt% Clay, 10 wt% TiO 2 , 5 wt% Carbon and 5 wt% PVA). The fabricated membranes were sintered at 900°C for 1 hour in an Electrical Box furnace with heating rate 1oC/min and holding time for 1 hour. Apparent density and porosity were determined by standar methods for ceramic materials. Phase composition of the ceramic support was established by X-Ray Diffraction analysis. SEM studies of the membranes added at different CuZn were carried out.
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Preparation and properties of porous clay/CuZn composite produced by extrusion process
2018Co-Authors: Muh Amin, Muhammad SubriAbstract:The use of dry pressing method in making composite is actually easier and simpler but it is less appropriate for the method if used for mass product. Then this study uses extrusion method. Porous Clay/CuZn composite was fabricated by an extrusion process with the addition of CuZn as sintering additive up to 40 wt.%. Clay powder was mixed and kneaded with (TiO2 10 wt.%, active carbon 5 wt.%, polyvinyl alcohol 5 wt.%) and additives Brass with variously. All wt.% mentioned excluding solvent water 20 wt.% and lubricant (glycerin oil, 1 wt.%). The resulting dough was extruded, dried at room temperature for 48 hours, and sintered at 1000°C for 1 hour in an Electrical Box furnace with heating rate 1°C/min and holding time for 1 hour. The phase composition, microstructure, density and porosity of the sintered porous bodies were also investigated. The addition of 10 wt.% CuZn on the composite materials showed a porosity more than 50 wt.%.The use of dry pressing method in making composite is actually easier and simpler but it is less appropriate for the method if used for mass product. Then this study uses extrusion method. Porous Clay/CuZn composite was fabricated by an extrusion process with the addition of CuZn as sintering additive up to 40 wt.%. Clay powder was mixed and kneaded with (TiO2 10 wt.%, active carbon 5 wt.%, polyvinyl alcohol 5 wt.%) and additives Brass with variously. All wt.% mentioned excluding solvent water 20 wt.% and lubricant (glycerin oil, 1 wt.%). The resulting dough was extruded, dried at room temperature for 48 hours, and sintered at 1000°C for 1 hour in an Electrical Box furnace with heating rate 1°C/min and holding time for 1 hour. The phase composition, microstructure, density and porosity of the sintered porous bodies were also investigated. The addition of 10 wt.% CuZn on the composite materials showed a porosity more than 50 wt.%.
Vigo Fiestas, Jorge Ernesto - One of the best experts on this subject based on the ideXlab platform.
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El sistema de control interno del almacén y la gestión de inventarios de la Constructora Paroba S.A.C. 2018 (Tesis parcial)
'Dipartimento di Economia Universita di Perugia (IT)', 2018Co-Authors: Vigo Fiestas, Jorge ErnestoAbstract:ABSTRACT The present work entitled "The system of internal control of the warehouse and the inventory management of the construction company PAROBA S.A.C.", has as its General Objective to determine the effect of the internal control system of the warehouse in the inventory management of the construction company PAROBA S.A.C. from the city of Trujillo-2018, the research design used was the Non-Experimental - descriptive, using as instruments: Interviews and Questionnaires prepared by the author, which are based on the theory of Estupiñan and Rodríguez; the population was made up of all the documentation of the operations of the warehouse area of the company PAROBA SAC of the year 2017. Within the main conclusion it was determined that the Internal Control System of the warehouse has a positive effect on the operation of the warehouse which will improve the management of the inventories of the construction company PAROBA SAC minimizing losses, impairment due to deterioration and maturity of materials; as well as avoiding cost overruns generated by material shortages. Among the secondary conclusions: Material losses were quantified, which amount to 9455 units, causing a loss of S /. 53 452.00. We identified the materials that show deterioration due to deterioration such as: sanitary, Electrical, iron and pipe fittings, representing a total of 617 products, with a total amount of S /. 48 539.04. in relation to the products that have maturity is the cement with a total of 256 units, ascending to an amount of S /. 4339.20 and the uncoded products are: sanitary, Electrical, Box, cement, iron and pipe fittings. By not having minimum and maximum stock of materials, cost overruns were determined in relation to a sewerage work budget for urgent purchases of 615 units with a total cost overrun of S /. 963.10 during the year 2017.TesisRESUMEN El presente trabajo titulado “El sistema de control interno del almacén y la gestión de inventarios de la constructora PAROBA S.A.C.”, ha tenido como Objetivo General determinar el efecto del sistema de control interno del almacén en la gestión de inventarios de la constructora PAROBA S.A.C. de la ciudad de Trujillo-2018, el diseño de investigación utilizado fue el No Experimental - descriptivo, empleando como instrumentos: Entrevistas y Cuestionarios elaborado por el autor, los cuales están basados en la teoría de Estupiñan y Rodríguez; la población estuvo conformada por toda la documentación de las operaciones del área de almacén de la empresa PAROBA S.A.C del año 2017. Dentro de la conclusión principal se determinó que el Sistema de Control Interno del almacén tiene un efecto positivo en la operatividad del almacén el cual mejorará la gestión de los inventarios de la constructora PAROBA S.A.C. minimizando pérdidas, desmedros por deterioro y vencimiento de materiales; así como evitar sobrecostos generados por desabastecimiento de materiales. Entre las conclusiones secundarias: Se cuantifico las pérdidas de materiales, los cuales ascienden a 9455 unidades, ocasionando una pérdida de S/. 53 452.00. Se identificaron los materiales que presentan desmedro por deterioro como: accesorios sanitarios, eléctricos, fierro y tubería, representando un total de 617 productos, con un importe total de S/. 48 539.04. en relación a los productos que tienen vencimiento es el cemento con un total de 256 unidades, ascendente a un importe de S/. 4339.20 y los productos sin codificar son: accesorios sanitarios, eléctricos, caja , cemento, fierro y tubería. Al no contar con stock mínimos y máximos de materiales, se determinaron sobrecostos en relación a un presupuesto de obra de alcantarillado por compras urgentes de 615 unidades con un sobrecosto total de S/. 963.10 durante el año 2017
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El sistema de control interno del almacén y la gestión de inventarios de la Constructora Paroba S.A.C. 2018
Universidad Privada del Norte, 2018Co-Authors: Vigo Fiestas, Jorge ErnestoAbstract:RESUMEN El presente trabajo titulado “El sistema de control interno del almacén y la gestión de inventarios de la constructora PAROBA S.A.C.”, ha tenido como Objetivo General determinar el efecto del sistema de control interno del almacén en la gestión de inventarios de la constructora PAROBA S.A.C. de la ciudad de Trujillo-2018, el diseño de investigación utilizado fue el No Experimental - descriptivo, empleando como instrumentos: Entrevistas y Cuestionarios elaborado por el autor, los cuales están basados en la teoría de Estupiñan y Rodríguez; la población estuvo conformada por toda la documentación de las operaciones del área de almacén de la empresa PAROBA S.A.C del año 2017. Dentro de la conclusión principal se determinó que el Sistema de Control Interno del almacén tiene un efecto positivo en la operatividad del almacén el cual mejorará la gestión de los inventarios de la constructora PAROBA S.A.C. minimizando pérdidas, desmedros por deterioro y vencimiento de materiales; así como evitar sobrecostos generados por desabastecimiento de materiales. Entre las conclusiones secundarias: Se cuantifico las pérdidas de materiales, los cuales ascienden a 9455 unidades, ocasionando una pérdida de S/. 53 452.00. Se identificaron los materiales que presentan desmedro por deterioro como: accesorios sanitarios, eléctricos, fierro y tubería, representando un total de 617 productos, con un importe total de S/. 48 539.04. en relación a los productos que tienen vencimiento es el cemento con un total de 256 unidades, ascendente a un importe de S/. 4339.20 y los productos sin codificar son: accesorios sanitarios, eléctricos, caja , cemento, fierro y tubería. Al no contar con stock mínimos y máximos de materiales, se determinaron sobrecostos en relación a un presupuesto de obra de alcantarillado por compras urgentes de 615 unidades con un sobrecosto total de S/. 963.10 durante el año 2017.ABSTRACT The present work entitled "The system of internal control of the warehouse and the inventory management of the construction company PAROBA S.A.C.", has as its General Objective to determine the effect of the internal control system of the warehouse in the inventory management of the construction company PAROBA S.A.C. from the city of Trujillo-2018, the research design used was the Non-Experimental - descriptive, using as instruments: Interviews and Questionnaires prepared by the author, which are based on the theory of Estupiñan and Rodríguez; the population was made up of all the documentation of the operations of the warehouse area of the company PAROBA SAC of the year 2017. Within the main conclusion it was determined that the Internal Control System of the warehouse has a positive effect on the operation of the warehouse which will improve the management of the inventories of the construction company PAROBA SAC minimizing losses, impairment due to deterioration and maturity of materials; as well as avoiding cost overruns generated by material shortages. Among the secondary conclusions: Material losses were quantified, which amount to 9455 units, causing a loss of S /. 53 452.00. We identified the materials that show deterioration due to deterioration such as: sanitary, Electrical, iron and pipe fittings, representing a total of 617 products, with a total amount of S /. 48 539.04. in relation to the products that have maturity is the cement with a total of 256 units, ascending to an amount of S /. 4339.20 and the uncoded products are: sanitary, Electrical, Box, cement, iron and pipe fittings. By not having minimum and maximum stock of materials, cost overruns were determined in relation to a sewerage work budget for urgent purchases of 615 units with a total cost overrun of S /. 963.10 during the year 2017
Muh Amin - One of the best experts on this subject based on the ideXlab platform.
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Effects of brass addition on the flexural strength and microstructure of porous clay/brass composites
MATEC Web of Conferences, 2018Co-Authors: Muh Amin, Rubijanto Juni Pribadi, JamasriAbstract:Porous clay/brass composite was fabricated by an extrusion process with the addition up to 40 wt.% brass has been successfully done. Clay 80 wt.%, TiO2 10 wt.%, active carbon 5 wt.%, and polyvinyl alcohol 5 wt.% have been prepared as a matrix for this study. All of wt.% has been mentioned excluding solvent water 20 wt.% and lubricant (glycerin oil, 1 wt.%). Before the moulding process, all the raw materials were mixed to obtain homogeneity. Blending process was done by adding 20 wt.% water until the mixture turned into dough. After the moulding process, the specimens were dried at room temperature for 48 hours, and then they were sintered at 800°C for 1 hour in an Electrical Box furnace with heating rate 1°C/min and holding time of 1 hour. The flexural strength of specimens and the microstructure of the sintered porous bodies were also investigated. The addition of 20 wt.% brass on the composite materials showed a higher on the strength, that is 0.6 MPa and 0.38 MPa on yield strength.
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Preparation and Characterization of Porous Ceramic Membranes for Micro-Filtration from Clay/CuZn Using Extrusion Methods
MATEC Web of Conferences, 2018Co-Authors: Muh Amin, Muhammad SubriAbstract:In this study, fabrication and characterization of ceramic membranes preparation was carried out. Porous ceramic membranes were fabricated by extrusion process from different percentage composition of CuZn on (80 wt% Clay, 10 wt% TiO 2 , 5 wt% Carbon and 5 wt% PVA). The fabricated membranes were sintered at 900°C for 1 hour in an Electrical Box furnace with heating rate 1oC/min and holding time for 1 hour. Apparent density and porosity were determined by standar methods for ceramic materials. Phase composition of the ceramic support was established by X-Ray Diffraction analysis. SEM studies of the membranes added at different CuZn were carried out.
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Preparation and properties of porous clay/CuZn composite produced by extrusion process
2018Co-Authors: Muh Amin, Muhammad SubriAbstract:The use of dry pressing method in making composite is actually easier and simpler but it is less appropriate for the method if used for mass product. Then this study uses extrusion method. Porous Clay/CuZn composite was fabricated by an extrusion process with the addition of CuZn as sintering additive up to 40 wt.%. Clay powder was mixed and kneaded with (TiO2 10 wt.%, active carbon 5 wt.%, polyvinyl alcohol 5 wt.%) and additives Brass with variously. All wt.% mentioned excluding solvent water 20 wt.% and lubricant (glycerin oil, 1 wt.%). The resulting dough was extruded, dried at room temperature for 48 hours, and sintered at 1000°C for 1 hour in an Electrical Box furnace with heating rate 1°C/min and holding time for 1 hour. The phase composition, microstructure, density and porosity of the sintered porous bodies were also investigated. The addition of 10 wt.% CuZn on the composite materials showed a porosity more than 50 wt.%.The use of dry pressing method in making composite is actually easier and simpler but it is less appropriate for the method if used for mass product. Then this study uses extrusion method. Porous Clay/CuZn composite was fabricated by an extrusion process with the addition of CuZn as sintering additive up to 40 wt.%. Clay powder was mixed and kneaded with (TiO2 10 wt.%, active carbon 5 wt.%, polyvinyl alcohol 5 wt.%) and additives Brass with variously. All wt.% mentioned excluding solvent water 20 wt.% and lubricant (glycerin oil, 1 wt.%). The resulting dough was extruded, dried at room temperature for 48 hours, and sintered at 1000°C for 1 hour in an Electrical Box furnace with heating rate 1°C/min and holding time for 1 hour. The phase composition, microstructure, density and porosity of the sintered porous bodies were also investigated. The addition of 10 wt.% CuZn on the composite materials showed a porosity more than 50 wt.%.
Mickael Langlais - One of the best experts on this subject based on the ideXlab platform.
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Seismological station CREF of Résif, located in the commune of Crevoux (Hautes-Alpes)
2018Co-Authors: Mickael LanglaisAbstract:This image shows the seismological station CREF of the RLBP network (Permanent Broadband Network). This station is located in the commune of Crevoux (Hautes-Alpes). This station is part of the Résif seismological network, it is equipped with a short period velocity meter of the Mark-Product L4C-3D type. This sensor measures the speed of soil movement in the three directions (Vertical, North and East). It is called "short-period" because it detects ground movements in a frequency range from 1Hz to about 50Hz, as opposed to broad band sensors that record ground movements over a period of several tens of seconds or even hundreds of seconds. It is also a "passive" sensor in the sense that it is not Electrically powered, making it more resistant over time but implying that it is less sensitive (about 10 times less) than the powered models. This seismological station was deployed in particular to monitor the seismicity of the "Ubaye" area, which is one of the most active parts of the French Alps. On this picture we can distinguish different elements constituting this seismological station: i) the solar panel allowing to provide the necessary energy for operation, ii) the Electrical Box, located under the solar panel, which contains both the seismological station which converts the signals from the sensor into digital information, as well as the ADSL modem which allows to transmit this "digitized" data in almost real time to the Résif data center, iii) at the top, we also see the concrete manhole which hosts the velocimetric sensor. The data transmitted in real time are accessible to the entire scientific community through the dissemination channels set up in the national Résif data center. The French seismological and geodetic network Résif is a national research infrastructure dedicated to the observation and understanding of the structure and dynamics of the Internal Earth. Résif is based on high-tech observation networks, composed of seismological, geodetic and gravimetric instruments deployed in a dense manner throughout France. The data collected make it possible to study with high spatial and temporal resolution the deformation of the ground, surface and deep structures, seismicity on a local and global scale and natural hazards, and more particularly seismic events, on French territory. Résif is part of the European (EPOS - European Plate Observing System) and global systems of instruments used to image the Earth's interior as a whole and to study many natural phenomena.
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Installation of the seismological station OGS3 on the top zone of the landslide in Séchilienne (Isère)
2013Co-Authors: Mickael LanglaisAbstract:This picture was taken during the installation phase of the seismological station OGS3, located in the Mont-Sec on the plateau overlooking the Séchilienne landslide (Isère). The picture shows a part of the installation in progress. A trench about 2m deep had been made to install the sensors on the bedrock, in a HDPE tank (the black element). In the foreground is the Electrical cabinet containing the equipment dedicated to signal digitisation (Taurus and Trident from Nanometrics) as well as the Electrical Box for the power supply and the 3G modem for transmission. This station is a coupled broadband velocimetry (TrilliumCompact120s-Nanometrics) and accelerometry (Episensor-T Kinemetrics) site. The objective of deploying this site was to i) extend the instrumental coverage of the area in order to better monitor the movements of the landslide and optimise the detection of block falls (velocimeter) but also to be able to record strong movements if necessary and to monitor the evolution of the ground parameters. This site operates autonomously (solar power supply and 3G teletransmission). The station, operated by ISTerre, is integrated into the Multidisciplinary Observatory of Slope Instabilities (OMIV), the Permanent Broadband Network (RLBP) and the Permanent Accelerometric Network (RAP), the latter two of which are part of Résif, a research infrastructure dedicated to the observation and understanding of the internal Earth structure and dynamics. It is based on observation networks of high technological level, composed of seismological, geodetic and gravimetric instruments deployed in a dense manner throughout the French territory. The data collected enable the study, with high spatio-temporal resolution, of ground deformation, surface and deep structures, local and global seismicity and natural hazards, particularly seismic, on French territory. Résif is integrated into the European (EPOS - European plate observatory system) and worldwide systems of instruments that allow us to image the interior of the Earth as a whole and to study numerous natural phenomena.
Milan Malcho - One of the best experts on this subject based on the ideXlab platform.
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Heat Dissipation from Power Electronic Components and Electrical Enclosures Using the Gravity Loop Heat Pipe
2020Co-Authors: Patrik Nemec, Milan Malcho, Maria Polacikova, Jozef JandačkaAbstract:At present, a great accent is placed on the right method of heat dissipation and waste heat recovery. The research work deals with the removal of heat from the internal space of the Electrical Box. Waste heat generated by the operation of Electrical equipment is undesirable for their proper function. The research is focused mainly on the dissipation of Joule’s heat and its use is subject to further investigation. The first part describes various methods of cooling Electrical Boxes and the second part describes our specific method of cooling for Electrical Boxes. The investigated cooling system operates on the principle of a gravity loop thermosiphon. This type of cooling is an energy and structurally simple method because it is based on a phase change of the working substance. Another advantage is the removal of waste heat without contamination of the interior by external dirt and dust. The work results were obtained experimental on the measuring device. The measurements were performed at different heat loads and at different amounts of working substance in the cooling system. The measurement results evaluation and their comparison provide relevant data about the cooling capacity of the cooling system and indicate which working substance volume is effective at various heat load at the same time.
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Dustproof cooling of the Electrical Box
EPJ Web of Conferences, 2018Co-Authors: Patrik Nemec, Katarína Kaduchová, Milan MalchoAbstract:In present are Electrical Boxes cooled by air through the intake hole on the bottom Electrical Box to the Box space with electrotechnical elements and exhaust through the hole at the top to the surrounding by natural convection. This cooling method is effective but operate with the risk of contamination electrotechnical elements by dust sucking from surrounding air. The goal of this work is solution of the dustproof cooling of the Electrical Box by natural convection. The work deal with design of the device with the heat transfer by the phase change of the working fluid and experimental measuring its thermal performance at the cooling electrotechnical elements loaded by heat 1 200 W in the dustproof Electrical Box.