3c Tecnologia最新文献

{"title":"Propuesta metodológica para dibujar proyecciones isométricas","authors":"Manuel Morocho Amaguaya, Luis Danilo Flores Rivera, Carlos Fernando Meléndez Tamayo","doi":"10.17993/3ctecno/2020.v9n2e34.17-47","DOIUrl":"https://doi.org/10.17993/3ctecno/2020.v9n2e34.17-47","url":null,"abstract":"espanolEl presente articulo muestra una propuesta metodologica para dibujar proyecciones isometricas; su procedimiento se caracteriza por articular el analisis, lo metodico y lo curioso al proceso; siendo de gran beneficio para los estudiantes de la carrera de Ingenieria en Mantenimiento Industrial, Facultad de Mecanica, Escuela Superior Politecnica del Chimborazo (ESPOCH). En el analisis, el metodo cumple con observar la disposicion de la pieza mecanica y sus vistas; en lo metodico, se ejecuta una secuencia de pasos que facilitan la construccion de la pieza mecanica y sus vistas; y en lo curioso, es el interes por la visualizacion y resultado final de la pieza mecanica. Por tanto, la metodologia y proceso empleado facilitan el aprendizaje y contribuyen a un pensamiento logico indispensable para las carreras de ingenieria. Lo indicado, se justifica con resultados satisfactorios de estudiantes aprobados 88 % de la asignatura de dibujo tecnico, en los ultimos 10 anos (2010 - 2019); asi como informacion satisfactoria que se obtuvo de una encuesta practicada a los estudiantes de dibujo tecnico semestre Octubre 2019 - Febrero 2020. EnglishThis article shows a methodological proposal to draw isometric projections; its procedure is characterized by articulating the analysis, the methodical and the curious to the process; being of great benefit for the students of the Industrial Maintenance Engineering, Faculty of Mechanics, Polytechnic School of Chimborazo (ESPOCH). In the analysis, the method complies with observing the arrangement of the mechanical part and its views; in the methodical, a sequence of steps that facilitate the construction of the mechanical part and its views is executed; and in the curious thing, it is the interest for the visualization and final result of the mechanical piece. Therefore, the methodology and process used facilitate learning and contribute to logical thinking essential for engineering careers. The above is justified with satisfactory results of approved students 88 % of the subject of technical drawing, in the last 10 years (2010 - 2019); as well as satisfactory information that was obtained from a survey conducted to students of technical drawing semester October 2019 - February 2020.","PeriodicalId":41375,"journal":{"name":"3c Tecnologia","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2020-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67542416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical data for wind turbine micrositing inspired by human dynasties by use of the Dynastic Optimization Algorithm (DOA)","authors":"Shafiq-ur-Rehman Massan, Asim Imdad Wagan, Muhammad Mujtaba Shaikh","doi":"10.17993/3ctecno/2020.v9n2e34.71-85","DOIUrl":"https://doi.org/10.17993/3ctecno/2020.v9n2e34.71-85","url":null,"abstract":"This work presents the newly formulated Dynastic Optimization Algorithm, DOA as applied to the wind \u0000turbine micrositing problem. The data is acquired by the use of the standard MATLAB software at a \u0000wind speed of 12 m/s. The values of the efficiency of the algorithm, cost per installation of per unit \u0000turbine, and total dissipated power at each number of turbines installed are discussed. \u0000This algorithm is applied to two test functions and the results are described therein. It has been welldemonstrated \u0000that the proposed DOA exhibits superior performance over GA and DEA for test functions \u0000by hitting the minima very often and with higher precision. On the other hand DOA performance on \u0000WTM problem is also encouraging.","PeriodicalId":41375,"journal":{"name":"3c Tecnologia","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2020-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44739232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Extended Kalman filter for estimation of contact forces at wheel-rail interface","authors":"Khakoo Mal, I. Hussain, B. S. Chowdhry, T. Memon","doi":"10.17993/3ctecno.2020.specialissue5.279-301","DOIUrl":"https://doi.org/10.17993/3ctecno.2020.specialissue5.279-301","url":null,"abstract":"The wheel-track interface is the most significant part in the railway dynamics because the forces produced at wheel-track interface governs the dynamic behavior of entire vehicle. This contact force is complex and highly non-linear function of creep and affected with other railway vehicle parameters. The real knowledge of creep force is necessary for reliable and safe railway vehicle operation. This paper proposed model-based estimation technique to estimate non-linear wheelset dynamics. In this paper, non-linear railway wheelset is modeled and estimated using Extended Kalman Filter (EKF). Both wheelset model and EKF are developed and simulated in Simulink/MATLAB.","PeriodicalId":41375,"journal":{"name":"3c Tecnologia","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43371156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"AC/DC critical conduction mode buck-boost converter with unity power factor","authors":"A. H. Memon, Fazul Muhammad Noonari, Z. Memon, Ahmar Farooque, M. A. Uqaili","doi":"10.17993/3ctecno.2020.specialissue5.93-105","DOIUrl":"https://doi.org/10.17993/3ctecno.2020.specialissue5.93-105","url":null,"abstract":"The buck-boost converter operating in critical conduction mode (CRM) is commonly utilized in various applications because of many advantages like protection against short circuit, minimum component count, low operating duct-cycle, and low voltage on MOSFETs. However, its input power factor (PF) is not high while operating in constant ontime control. To attain unity PF for universal input voltage range, a new control scheme of variable on-time control (VOTC) is proposed in this paper. The VOTC can be implemented by modulating the turn-on time of the buck-boost switch. The working principle and performance comparison of the converter is discussed with both types of control scheme. The input PF the converter is high in case of VOTC than the COTC. Simulation results are presented to verify the effectiveness of the proposed control strategy).","PeriodicalId":41375,"journal":{"name":"3c Tecnologia","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47443280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Validating the optimum tilt angle for PV modules in the highveld of South Africa for the summer season","authors":"M. Lehloka, A. Swart, P. Hertzog","doi":"10.17993/3ctecno.2020.specialissue5.137-157","DOIUrl":"https://doi.org/10.17993/3ctecno.2020.specialissue5.137-157","url":null,"abstract":"Energy supply is a major problem in today’s world due to increase in demand, depleting of fossil fuels and increase in global warming due to carbon emission. The need for an alternate, overall efficient and environment-friendly energy system has ascended globally. Photovoltaic (PV) systems can be used to harness solar energy that is considered to be one of the most promising alternative energy sources. However, its efficiency is affected not only by varying environmental conditions but also by the installation of its PV modules. The purpose of this paper is to empirically validate the optimum tilt for PV modules in the Highveld of South Africa. Three fixed-axis PV modules installed at optimum tilt angles of Latitude minus 10°, Latitude, and Latitude plus 10° serve as the basis of this study. These optimum tilt angles are utilised based on the recommendations by Heywood and Chinnery. A key recommendation is that PV modules should be mounted at Latitude minus 10° for the summertime period in the Highveld region of South Africa.","PeriodicalId":41375,"journal":{"name":"3c Tecnologia","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48576174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Automatic pizza cutting machine","authors":"Atif Saeed, Saud Sattar, A. Ferguson","doi":"10.17993/3ctecno.2020.specialissue5.181-193","DOIUrl":"https://doi.org/10.17993/3ctecno.2020.specialissue5.181-193","url":null,"abstract":"","PeriodicalId":41375,"journal":{"name":"3c Tecnologia","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47253667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advances in agumented reality (AR) for medical simulation and training","authors":"V. Ivanov, Alexander Klygach, Sam Shterenberg, S. Strelkov, J. K. Levy","doi":"10.17993/3ctecno.2020.specialissue5.303-312","DOIUrl":"https://doi.org/10.17993/3ctecno.2020.specialissue5.303-312","url":null,"abstract":"Digital technologies are transforming the field of medical training, simulation and modeling. Advances in the field of virtual Augmented Reality (AR) and virtual simulation are described in detail, particularly as they relate to medical education and training. An overview of key medical simulation tools is provided in order provide foundational knowledge about this rapidly growing field. A timely and valuable original Augmented Realty system is put forward. The key components of this original system for medical training and simulation include the following three dimensions: advances in open surgery, realistic visualizations and innovative haptic was used. Each component of this Augmented Reality system is described in detail. First, the open surgery module emphasized appendectomies (the most common surgical procedures used in our model). Second, three different approaches for creating realistic and accurate 3D medical models were put forth. Third, haptic feedback involved the use of an enhanced Novint Falcon system in which a custom grip provides additional degrees of freedom. Finally, advances in game simulation, modeling and role playing are discussed for the field of emergency medicine.","PeriodicalId":41375,"journal":{"name":"3c Tecnologia","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44502689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An innovative jig to test mechanical bearings exposed to high voltage electrical current discharges","authors":"N. Steenekamp, A. Swart","doi":"10.17993/3ctecno.2020.specialissue5.195-215","DOIUrl":"https://doi.org/10.17993/3ctecno.2020.specialissue5.195-215","url":null,"abstract":"Premature bearing failures due to Electrical Current Discharge (ECD) has been recognised for almost a century. The purpose of this paper is to present an innovative jig that may be used to expose mechanical bearings to ECD, in order to clarify its associated effects on the bearing that need to be understood before any mitigating techniques can be proposed. An experimental design is used in this study. A method is presented using an ignition coil wiring harness of a vehicle to safely induce ECD across a specific bearing. Three samples were used and analysed with an optical and electron scanning microscope. The used ball bearing exposed to ECD showed micro-cratering, a result of electric current passage. Micro arching marks on the raceway surface of this bearing was also visible, and especially near the groove of the synthetic rubber seal and steel plate slinger. Surface pits were observed which were produced by electrical arching. A few deep scratches and indentations were observed on the raceway surface. This is due to abrasive wear particles embedded in the raceway surface sliding between the major bearing components. The aspect of electrical pitting wear and debris found in the lubricating oil are unknown and deserve further research from a tribological point of view. A recommendation is made to use this innovative jig to test the impact of ECD on bearings from other suppliers.","PeriodicalId":41375,"journal":{"name":"3c Tecnologia","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48710696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"IoT based fluid management automation system using Raspberry Pi and ultrasonic sensors","authors":"A. Urooj, Sallar Khan, Sana Shafiq, B. Ahmed, Abdul Basit, Shaheer Ansari","doi":"10.17993/3ctecno.2020.specialissue5.47-61","DOIUrl":"https://doi.org/10.17993/3ctecno.2020.specialissue5.47-61","url":null,"abstract":"Water crises is one of the most important problem of current era, as a huge amount of water wasted every year especially in residential and industrial. Improper timings and extensive electric consumption are one of the hectic issues faced by the society. We have successfully created a Kivy application for the user in which they can control the fluid wastage problem with the integration of hardware that includes (Microcontrollers, Ultrasonic sensors, Relay shield, node MCU 8266, and contactor). Through the help of our designed application, user can control: Water level status, Motor accessibility (on/off), status of water consumption, message alert facility of fluid. In future work, we focus to enhance the water model and will try to promote it to immense water plants as well as it can be adopted by agriculture sectors.","PeriodicalId":41375,"journal":{"name":"3c Tecnologia","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67542737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of COVID-19 epidemic on research activity of researcher in Pakistan Engineering University and its solution via technology","authors":"Shafiq-ur-Rehman Massan, A. Dahri, M. M. Shaikh","doi":"10.17993/3ctecno.2020.specialissue5.249-263","DOIUrl":"https://doi.org/10.17993/3ctecno.2020.specialissue5.249-263","url":null,"abstract":"This work focuses on taking the research from impact factor to impact which means that it would propose the best interventions required at both public and private sector universities to improve the research scenario in times of emergency. The timing of this work coincides with the current corona virus pandemic and it encompasses the best practices for such an era in modern times. It proposes the requisite revamping and careful reworking of the university towards becoming a research enabler for the students at a time of crisis. This article analyzes the effects of the Coronavirus disease on the researchers who must maintain social distance during confinement at the university and yet be able to carry out meaningful research by utilizing videoconferencing and other facilities.","PeriodicalId":41375,"journal":{"name":"3c Tecnologia","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46654029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}