Papers by Keyword: Module

Abstract: In Indonesia, students' science literacy has decreased due to the lack of innovative learning strategies carried out by teachers. Learning strategy efforts have been carried out by applying integrated ethnoscience-based problem-based learning modules to improve 21st-century skills. This research was conducted in MAN 1 Cirebon Regency using 2 classes in the form of control classes and experiments. This research instrument uses science literacy tests, observation sheets, and questionnaires. The results showed that the application of ethnoscience-based problem-based learning integrated modules was effective in improving students' science literacy skills. There was an increase in science literacy with an N-Gain value of 0.64, and there was a significant difference between the experimental class and the control class, with a 2-tailed sig value = 0.00 < 0.05. Ethnoscience can be done in addition to increasing local wisdom in the form of an introduction to batik by connecting redox material but can increase scientific literacy, especially in indicators of explaining phenomena scientifically.

Abstract: Earthen construction, as an architectural heritage, need to be studied and preserved. The analysis of the construction system’s clusters of Syunik region of the Republic of Armenia allows developing a model of restoration in the unified system and adaptation to the new requirements of the time. Documentation of the current condition of the preserved earthen structures in the Syunik region, analysis of the mechanisms of construction features. The study of the international experience of the earth structures makes it possible to propose ways for the implementation of the earthen structures typical of the region with new technology.

Abstract: In current scenario, all the manufacturing industries are placing constant efforts for their endurance in the current global volatile economy. Manufacturing industries are annoying to implement new and professional techniques in their regular production processes. Some of the recognized tools are applied and their awareness has been growing among the industries, especially in production sector. Last two decades have witnessed an explosion in the area of quality and productivity improvement initiatives in the manufacturing industries by different tools and techniques such as lean manufacturing, total quality management, total productive maintenance, six sigma implementation etc. The objective of this study is to enlighten the importance of lean techniques implementation in a medium scale belt manufacturing industry. This research study helps to exhibit the existing hidden potential in the selected industry as well as a selection of appropriate techniques for productivity improvements. Also, it aims to eradicate wastes and non-value added activities at every stage in order to enhance the overall productivity. From the results after implementation of appropriate lean techniques it was found that, the lead time was reduced about 1256 minutes and the overall production was increased by about 9%.

Abstract: The package parasitics are a serious obstacle to the high-speed switching, which is necessary in order to reduce the switching power losses or reduce the size of power converters. In order to design new packages suitable for Silicon Carbide (SiC) power transistors, it is necessary to extract the parasitics of different packages and be able to predict the switching performance of the power devices placed in these packages. This paper presents two ways of simulating the switching performance in a half-bridge power module with SiC MOSFETs. The results show that the parasitic inductances in the power module slow down the switching, lead to poor current sharing, and together with the parasitic capacitances lead to oscillations. These negative effects can cause failures, increased losses, and electromagnetic compatibility issues.

Abstract: We have demonstrated a new analysis method using a precise equivalent circuit of 3.3 kV 400 A full SiC modules and showed that the calculated waveforms well agree with the measured waveforms. We have also examined the current distribution in the module by utilizing this equivalent circuit model.

Abstract: Modular building is without question a world trend not unknown for the global building. Nowadays the future of architecture is discussed from the viewpoint of modular building. Modular building may have an exclusive role when dealing with current condition of architecture ant its future development. The article deals with the modular construction of the historical development and current trends. Construction speed, efficiency, quality materials. These are the common denominators of modular construction. However, it should be avoided technocratic construction without soul and try to instilling to modular construction aesthetic and quality parameters for building the modular architecture.

Abstract: Setup calculation function of the process control system for tandem cold rolling mills not only determinates the dimension accuracy of finished strip materials directly, but also affects the control of surface quality of strip materials. In the present work, an attempt was made to develop a new setup calculation method for tandem cold rolling mills to maximize the throughput and improve the surface quality of strips. Based on the application platform for level-2 process control system, the modular design method was adopted, and then the setup calculation function was developed. And four functional modules consisting of preset preparation module (PPM), basic setup calculation module (BSCM), dynamic setup calculation module (DSCM), and adaptive calculation module (ACM) were developed. The preset data from PPM were used in equipment of level-1 process control system, and the purposes of BSCM was to achieve high quality of products, reduce off thickness deviation and achieve stable rolling at maximum possible rolling speed for raising productivity. In order to minimize off error of preset and actual data, DSCM was provided. Thanks to the design of ACM, accuracy of mathematical model can be effectively improved on line. Ultimately, the precise model on setup calculation method for cold tandem rolling of strip steels was established, and then it was put into practical production. Statistics analysis showed that the measured data was in excellent agreement with the model, and exactly, the relative deviations on rolling force and delivery thickness of strips were less than 3.67% and 0.42%, respectively. The new setup calculation method has high precision and good generalization capability.

Abstract: In the paper a research methodology was developed and used to determine the rigidity in transversal direction of modular fixture structures. The paper presents experimental results regarding the total deformation of modular structure consisting of ”narrow” modules from modular kits. The research conducted showed the different evolution of deformation curves in the case of modular structure, with different shape and different sizes of modules, in the case of similar loads. The experimental results indicate displacements of the entire modular structure alongside the base plate and, also, tilting. The measured deviations of modules from fixture structure may cause "dimensional"/ position deviations (linear displacement of the measurement base) and deviations of shape and orientation-position (angular displacement of the measurement base) of the workpiece during severe machining conditions.

Abstract: The article describes the synthesis of the connecting system for mechatronic modules SCHUNK PowerCube PR70, PR90 and PW90. Emphasis is placed on enabling the quick reconfiguration of the kinematic structure of the manipulator for a mobile robotic system built from these modules. The article describes the process of synthesis of mechanic components of the system, hardware and software ensuring the necessary functions for the realization of connections, detection of orientation of the connected module, securing the flow of energy and data signals and the appropriate response in the control application of the system. This is substantiated by evaluating tests realized on produced prototypes of connecting systems. The article also describes a future outlook for further developments of the connecting system.

Abstract: Characteristics of SiC MOSFETs and SBDs with 3.3 kV-class have been presented. Static Characteristics of the MOSFET showed a specific on-resistance of 14.2 mΩ cm². A breakdown voltage of 3850 V is obtained by using the dose optimized edge termination structure as we have previously reported [1]. At the same time, reverse leakage current of the 3.3 kV SiC SBDs can be suppressed by the JBS structure and the edge termination which is also used in the MOSFETs. By using the MOSFETs and SBDs, we have demonstrated the superior capability of the 3.3 kV 400 A full SiC 2 in 1 modules with a compatible case and terminal configurations to Si IGBT modules. Dynamic characteristics of the full SiC module in an inductive load switching exhibits superior turn-on and turn-off properties even at a high drain voltage of 1650 V, demonstrating the availability of high voltage SiC power systems.