HUBUNGAN ANTARA EFIKASI DIRI DAN PERAN GURU DENGAN BELAJAR BERDASAR REGULASI DIRI PADA AKSELERAN

This research is a quantitative approach with the aim at knowing: (1). The relationship between self-efficacy and the role of the teacher by learning based on self-regulation. (2). The contribution given by self-efficacy and the role of teachers in self-regulation based learning. (3). Levels of self-efficacy and the role of teachers in learning based on self-regulation. The subject of this study was acceleration in one of the Public High Schools in Surakarta as many as 115 people. This study is a principled study on population studies. Based on the results and analysis using multiple regression it is known that the correlation coefficient R = 0.375 (p = 0.000: p <0.05), which means that there is a significant relationship between self-efficacy and the role of teachers with self-regulation. The total contribution given by the two independent variables in this study amounted to 14.1%, and for both categorizations the independent variables namely self-efficacy and the role of the teacher were at a high level, and the dependent variable of learning based on self-regulation was at a very high level. Key word: Self-Regulated Learning, Self-Efficacy, The Role of Teachers

High Efficency isolated DC-DC boots converter for Renewable energy Appliction { BS Project]

A huge amount of electrical energy in Pakistan is lost due to inefficient generation and distribution of power. [13] This project aims to address a very specific problem in this regard which is the energy conversion losses in power converters used with systems of renewable energy generation. The main problem that is being looked into is how the efficiency of an Isolated DC-DC Boost Converter can be improved. Addressing this issue helps in making effective use of renewable energy sources which in turn helps in reducing the energy deficit. To improve upon the design of an Isolated DC-DC Boost converter, it is imperative that first an in-depth study of the already existing designs be carried out. A detailed literature review helped in identifying areas that can be worked upon to increase efficiency. The major losses that occur in an isolated converter come from core and copper losses in its high frequency (HF) magnetic components that are the inductor and transformer. Apart from that, MOSFET losses and diode rectifying losses are also quite significant if chosen poorly. Hence, to increase efficiency, the most important part is an optimized design of HF components, careful selection when it comes to MOSFETs and diodes and finally selecting an appropriate converter topology. Increasing efficiency of HF magnetic components needs a rigorous analysis of design methodologies used to implement them. It was identified that some of the main factors involved in that were core material and geometry and its winding methodology.The killer for inductor and transformer are the leakage inductance and AC resistance which occur due to proximity and skin effect. It was identified that the main losses occur due to the winding method and the type of copper winding geometry. After an in-depth study and comparison between different winding types and methods, it was realized that copper foils help in reducing skin-depth effect and interleaving the windings would help in dealing with proximity effect. Interleaving is when primary windings of the transformer are sandwiched between secondary windings. To validate this design, first a theoretical analysis was carried out after which this design was implemented xi and tested in the lab where significantly low AC resistance and leakage inductance was observed.The major challenges in this project in the design phase were to identify methods for inductor and transformer construction. For transformer design, from analysis it wasdecided to implement interleaved windings but it was challenging to understand how the windings will terminate and physically implementing the windings without any gaps in etween. An unexpected challenge during transformer implementation was soldering the winding terminals using a high wattage soldering iron. This was because the solder has to be minimal to avoid any bumps. Another tight spot faced was while procuring material for the project as most of the required components were not available locally and that led to slight delays in the implementation phase. The converter proposed after the design and analysis has a theoretical efficiency of 97%. There can be a huge impact in utilizing renewable energy effectively if a practical use of this converter is carried out. However, to validate this research, the next step would be to implement the proposed device and computing its actual efficiency. Careful and precise implementation of the design can potentially achieve the calculated efficiency because of the design considerations taken into account. This can then be taken forward to local stakeholders such as the Alternate Energy Development Board (AEDB) as using locally designed and implemented converter will have a significant impact on the cost and benefit breakdown of sustainable energy projects being deployed