The Study on Simulation of Parallel Circuit Resistance in Motor
Xu Run, Zhiqiang Chen
Page Numbers : 480-483
DOI : 10.36348/sjet.2020.v05i11.014
The stall phenomenon which happens in loaded motor is unqualification in application. Meanwhile it may measure the maximum property of motor in manufacture. So the phenomenon of multiple circuit is analyzed to find a simulation of electrical state to predict the maximum currency and torque which is a necessary method to be proceeded up to now before design. We find that the simulation fits well to the reference. The conditions of multiple circuit with t=6s, U=12V result in the biggest stall force according to rotation to change time and voltage. Then it is t=8s, U=10V; t=10s, U=8V and t=12s, U=6V in turns. As for torque it is t=6s, U=12V; t=8s, U=10V; t=6s, U=12V and t=12s, U=6V in truns. When the voltage decreases resistance declines the rotation will decline in the end.
Nov. 25, 2020
The Kinematic Models of Crank with Angle and Time in Motor Housing Process
Page Numbers : 474-479
DOI : 10.36348/sjet.2020.v05i11.013
With regards to the assembly line of cost control of Dechang (HK) company, the motor housing’s cost control of process will be necessarily respected. Because the supply quantity is big in a machine the price of motor housing is small, so that the cost control of automatic production line is significant with modeling. It is found that the control of equipment includes in shaft and crank linkage for benefit which also needs to be controlled in detail. For the sake of benefits can we fundamentally resolve the main problem of high cost process.
Nov. 25, 2020
The Relationship between Volume & Pressure and Rotation & Torque in Engine Cylinder
Page Numbers : 484-485
DOI : 10.36348/sjet.2020.v05i11.015
At 500r/m the volume arrive 1.8E-4 liters which is the biggest one immediately after ignition. Pressure has a small summit when rotation is 2000r/m. The highest pressure attains 4800Pa. When the torque is maximum 400Nm the volume arrives maximum 5E-3liters. Here the correspond rotation this moment is 30r/m.
Nov. 23, 2020
Standardization of Protection Commissioning Testing in Transmission Protection Department
Amna Abdulla, Sara Almulla
Page Numbers : 469-473
DOI : 10.36348/sjet.2020.v05i11.012
In line with the recent developments and innovations, standardization is a topic that is mainly focused on to ensure an easy flow of operations and reduction in complexity in many different fields. Given the diverse applications of which standardization can be applied to, this paper will focus specifically on the standardization of commissioning tests for protection relays as well as the process and the impact of the implementation of standardization in this particular field. Background : This paper’s focus and origin is from the United Arab Emirates specifically in the electricity sector in Dubai’s Water and Electricity Authority (DEWA); Transmission Power Division, Transmission Protection Department (TPD). Direct emphasis is on the commissioning section where various commissioning tests are carried out for many different protection relays in many different applications in Transmission Substations of Voltage Levels 400/132kV and 132/11kV. As of date, Transmission Power substations counts 330 numbers while more are yet to undergo or complete the engineering phase only to enter the commissioning phase and be tested and commissioned. Commissioning tests have been made easier and more efficient by introducing standardization in 2010, where procedures of various commissioning tests involving protection relays have been standardized and applied whenever a new substation comes to light.
Nov. 19, 2020
The Relationship between Force and the Temperature & Length within one Cycle in Engine Cylinder
Page Numbers : 457-459
DOI : 10.36348/sjet.2020.v05i11.010
The force in engine is studied and find that the relationship of it and temperature with two methods of cooling and heating temperature. The force will decline when the temperature inclines in one cycle of engine cylinder movement. On the other hand force will incline when the temperature inclines with cooling temperature. When cylinder length inclines the force will decline.
Original Research Article
Nov. 19, 2020
Alteration of Air Transmittance of Plain Weft Knitted Fabrics for Different Parameters
Mohammad Mobarak Hossain, Upama Nasrin Haq, and Mohammad Mahmudur Rahman Khan
Page Numbers : 451-456
DOI : 10.36348/sjet.2020.v05i11.009
Physical properties of fabric basically depend on fabric cover and porosity. Other fabric parameters that influence the air transmittance of a fabric are type of stitches used, type of yarn, linear density, twist factor in the yarn, stitch density, thickness, tightness factor and fractional cover of fabric and moisture content which has a circuitous effect on those parameters. Many researchers had already derived so many relationships among those parameters and the fabrics properties. But, air transmittance rate may influence other comfort properties of the fabric. Our investigation shows the relationship of different parameters which can alter the transmittance of air through the plain knitted fabric. Here, a little change in the structure can alter the air transmittance which has been represented graphically.
Original Research Article
Nov. 19, 2020
Influence of Teacher Professional Knowledge and Application on Pupils Academic Performance in Public Primary Schools in Suna East Sub-County Migori County, Kenya
Onyango David Diang’a, Dr. Yambo, J. M. O., Dr. Kennedy N. Getange
Page Numbers : 460-468
DOI : 10.36348/sjet.2020.v05i11.011
Poor academic performance of most public primary schools in Suna East Sub-County is a serious challenge in Migori County. Out of five zones in the sub-county, there was low learning outcome in the assessment score with a mean standard score of 250 out of 500 marks for the last five years. The objective of this study was to investigate the influence of teacher professional knowledge and application on academic performance. The study used a survey design and both qualitative and quantitative methods of data collection and analysis. This study was based on two theories; the goal setting theory by Edward Locke and Expectant theory by Vroom. The study had a population of 65 head teachers, 65 deputy head teachers and 500 assistant teachers in public primary schools in Suna-East Sub-County Migori County. Krejcie and Morgan table was used to obtain a sample size of 56 Head teachers, 56 deputy heads, and 217 assistant teachers. The study also used both questionnaires and interview schedules to collect data. Validity of the research instruments was determined through open discussion with the supervisors of Kisii University. Reliability of the research instruments was established through test re- test method using questionnaires and interview schedules results. The data collected was analyzed using statistical package of social sciences (SPSS) version 21 to generate descriptive statistics in a correct and informative way. This study would be significant in the field of education in enhancing quality education by the educators. The finding revealed that most of the teachers 163(83.9%) indicated that they think that professional knowledge is essential in enhancing teaching outcomes, only 33(16.1%) who did not consent. Professional knowledge is viewed as key in evaluating teachers teaching outcomes. It includes all professional record kept by the teachers to enhance learning and academic outcome. The study recommended maintenance of professional records at all times. It concluded that a teacher should ensure there is effective syllabus coverage by attending all lessons as per the school timetable. The researcher paid keen attention to research ethical issues and got the informed consent of the respondents and guarded against plagiarism and ensured confidentiality.