Jurnal Pendidikan Teknologi Kejuruan
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Stakeholder opinions of the student’s abilities during the research internship program
Full text linkRecently, there has been a gap between the skills needed by industry and learning materials in schools that still need to meet expectations. Research internship programs (RIP) viewing as a link that can eliminate these disparities. However, there is no conclusive proof of the learning results of the program. This study seeks to dig deeper into information based on a stakeholder\u27s point of view on the quality of skills demonstrated by students in research internship programs. This research is qualitative. The case study method approach analyzes phenomena in the workplace according to assessment reporting in terms of stakeholder perceptions. Research informants consist of primary, supporting, and critical stakeholders. This paper uses triangulation techniques to reduce data, present data, and draw conclusions. The results of this study indicate that students\u27 readiness and skills affect hard-skill performance but do not significantly affect the results of the research conducted. Stakeholder perception states that schools need more time to be ready to implement research internships based on Ministerial Decree Number 123/M/KPT/2019
Knowledge management and pedagogical innovativeness of vocational educators, the mediating role of transformational leadership style
Full text linkThe study investigated the relationships on three dimensions of Knowledge Management (KM), Pedagogical Innovativeness (PI) and Transformational Leadership Style (TLS). Design used for the study was correlational and data were collected from 137 vocational educators/lecturers in public universities in Nigeria, this forms the sample of study. Structured questionnaire instrument was used, covering the demographic variables of the respondents and measuring the relevant dimensions of knowledge management, pedagogical innovativeness and transformational leadership style. Three experts face validated instrument for this study. The reliability was measured by using Cronbach alpha method and an overall alpha value of 0.89 was obtained. The data was collected by the authors and analysed. Bivariate correlation linear regression and path analysis via 5000 re-samples bootstrap method was used for analysis. The results showed that knowledge management dimensions i.e. knowledge dissemination, responsiveness to knowledge predict significantly pedagogical innovativeness while knowledge acquisition did not significantly predict pedagogical innovativeness. It also showed that transformational leadership style does mediate relationship between knowledge management and pedagogical innovativeness. The results suggest that knowledge acquisition (KA), knowledge dissemination (KD) responsiveness to knowledge (RK) are among the key indicators of pedagogical innovativeness. The results also suggest that transformational leadership style will not bring about the relationship between knowledge management and pedagogical innovativeness. Based on findings, it was recommended that knowledge management should be encouraged in tertiary institutions as this will enhance pedagogical innovativeness of vocational educators. In addition, management of tertiary institution should employ transformational leadership style for ultima productivity of their employees
Testing of palm oil-based electric power transformer insulation oil as a renewable energy source
Full text linkReducing petroleum resources and environmental problems, alternative insulating oils with biodegradable characteristics have become an alternative. Esterification of palm-based oil is expected to provide better and optimum electrical properties. The esterification of palm oil will be carried out as a test sample and observed for its electrical, physical and chemical properties such as PD characteristics, breakdown voltage, dissipation factor, viscosity, flash point, etc. The effect of thermal aging on oil samples will also be carried out to simulate real situations in power transformer applications. Then after obtaining the best formulation from the sample it will be used as insulating oil in electric power transformers (100kVA). The purpose of this research is to apply esterified palm oil as an electric power transformer oil. The method used in this research includes field research. Field research includes taking oil samples, measuring the breakdown voltage of transformer oil, and the color of transformer oil. The results obtained are insulating oil for electric power transformers based on palm oil. Palm oil has the advantage of being an environmentally friendly, biodegradable and renewable oil compared to the transformer oil used today which is based on petroleum. With the realization of transformer oil based on palm oil, it is hoped that it can provide great economic opportunities for Indonesia as one of the largest palm oil producers in the world and can also provide added value and increase the competitiveness of the palm oil industry in the future
Effect of PLTS power factor settings on power losses and voltage conditions in 20 kV medium voltage networks
Full text linkAs technology develops, the rapid increase in PV capacity will affect the grid. This makes it important to determine the PV limit that can be injected into the grid defined as the PV Hosting Capacity (PVHC). In this paper, the author evaluates and analyses the impact of PV connections on medium voltage distribution lines (20kv) using ETAP 19.01 simulation. A medium voltage Grid with a capacity of 30MVA, has an industrial load varies from 650 kVA to 25 kVA with the total load capacity of 2225 KVA. The loads are supplied from two sources, grid and PV system. The simulation results state that the best of grid performance which provide the best losses and voltage condition when connecting 100% capacity of PV to the existing grid network is by setting the inverter power factor to 0.9. This setting will provide lowest power losses of 0,7 kW and improve the voltage value
Economic analysis of solar photovoltaic power plant planning at Taman Melati Depok Apartment
Full text linkCurrently, Indonesia is still using fossil fuel power plants. The high use of fossil fuels will harm the environment, therefore to reduce the use of fossil fuels, it is necessary to develop renewable energy power plants, one of which is a solar photovoltaic power plant. This study discusses the economic analysis of planning a soalr photovoltaic power plant at the Taman Melati Depok Apartment which is connected to the PLN network with the PVsyst software. This PLTS plan will be built on the roof of the apartment using an area of 437 m2 with generated power of 90,400 Wp. Using solar modules with a capacity of 565 Wp as many as 160 modules. This PLTS can generate electricity per year 116600 kWh/year. The Cost of Energy (COE) for this PLTS is Rp.735.39/kWh. Economic analysis uses Net Present Value (NPV), Profitability Index (PI), and Discounted Payback Period (DPP) to determine whether this PLTS is feasible or not. Based on the calculation result, the NPV value is Rp. 608,793,939.29, while the PI value is 1.587 and the DPP value is around 12 years and 9 months, which is faster than the project age, which is 30 years. Thus the investment in the Taman Melati Apartment PLTS project is feasible to continue.  
Economic analysis of waste power plants based on the economic scale -Case study Merah Putih waste power plant
Full text linkJakarta\u27s dense population creates problems with the high daily waste production, which reaches 7,500 tons. On the other hand, the open dumping method in the final waste treatment creates another problem in the form of greenhouse gas emissions. The regional government also issued a policy to reduce greenhouse gas emissions to achieve net zero emission by 2050. The solution that then emerged for the two problems above was to convert waste into electrical energy through incineration technology. This study aims to conduct an economic analysis in the context of implementing incineration technology. The results showed that the minimum capacity for economic feasibility was 8 MW with an LCoE of IDR 2,578.32/kWh, 429 tonnes of waste per day, an IRR of 8.63%, and an NPV of IDR 115,038,835,638.12 at an investment value of IDR 505.877.074.31
Predicting graduate employment: the relationship among social skills, performance and motivation in cosmetology education graduates
Full text linkThere have been many studies focusing on graduate tracing. However, they were still determining how likely the graduates will work following their interests and the fields of knowledge they have studied. This study aimed at gaining improved awareness of cosmetology education graduates\u27 employment readiness concerning social skills, performance, and work motivation. This explanatory research used the entire research population of the last two years, as many as 70 graduates. Data collection was carried out using a questionnaire on each variable studied. While the analysis method used a structural equation model (Warp-PLS) to confirm the model\u27s accuracy while testing the influence of variables on other variables and verifying that the instruments utilized were valid and dependable. The results proved that social skills, performance and work motivation directly and significantly affect graduate job readiness. Graduates\u27 social skills and performance also affected job readiness in the field. The social skills of graduates were higher in influence than the performance and motivation of graduates in work readiness, with a difference of 0.391. These results implied a need to improve soft communication skills and spiritual provision in addition to the competencies that graduates already have
Harmonic distortion characteristics generated by heating ventilation air conditioning system case study in PCR Laboratory
Full text linkGood power quality is required in health facilities since the increasing use of microprocessor-based equipment. Poor power quality in the electric power system can cause medical equipment in health care centers to malfunction and give incorrect medical diagnoses. Since 2020 we are facing a new type of Virus (Covid-19), this virus requires special laboratory construction with specific air conditioning systems (temperature, humidity, and pressure) to process specimens. This paper presents measurement results of harmonic distortion characteristic by Variable Frequency Drive (VFD) of Heating Ventilation Air Conditioning (HVAC) system in PCR Laboratory at Clinic A. The VFD in this system is used to adjust the rotation of the exhaust fan and outdoor unit. The measured voltage, current and power are used to assess power quality. The main power quality problems found in medical facilities are voltage flicker, neutral currents, and total harmonic distortion (THD) values. The measurement of total harmonic distortion (THD) is used to find the source of the harmonics. Potential problems can be identified within the facility. The results of this study can be used to develop, test, and validate the system that has been used
Batang bayang river flood modeling based on rain return period
Full text linkWest Pasaman Regency is one of the regencies in West Sumatra that experiences flooding the most. In 2020, in April and September, floods occurred in the West Pasaman district, more precisely around the Nagari Ujung Gading area, Lembah Melintang District. Floods most often inundate the Jorong Lombok and Jorong Irian areas. The flood that occurred was caused by the overflow of the Batang Bayang river. Puddles of water inundated at least 150 residents\u27 houses until the water level reached a height of 1 meter. The problem of flooding almost every year is felt by residents who live near the location of the Batang Bayang river. This study aims to determine the flood discharge of the Batang Bayang river with return periods of 2, 5, 10 and 25 years. Then this study also aims to determine the ability of the Bayang Bayang River to flow flood discharge for 2, 5, 10 and 25 years return periods. The results show that the 2-year return period produces a maximum flood discharge of 47.2 m/s3. In the 5-year return period it produces a flood discharge of 110 m/s3, in the 10-year return period it produces a flood discharge of 143.6 m/s3 and at the return period of 25 years resulted in a flood discharge of 189.2 m3/s. The cross section modeling in the 2 year return period resulted in a water elevation of 21.07 meters. The 5-year return period modeling results in a water level elevation of 22.4 meters. The 10-year return period models the water at an elevation of 23.01 meters and the 25-year return period produces a water level of 23.72 meters
Development of interactive e-module based on video and augmented reality for earthquake technology course
Full text linkThe implementation of augmented reality and video in instructional media is highly suitable for courses in the field of civil engineering, one of them is the Earthquake Technology. This research employed the Research and Development (R&D) method using the ADDIE model in developing the e-module. The result of this research is an e-module specifically designed for the Earthquake Technology courses. The e-module was validated by media experts, subject matter experts, and students as part of the evaluation process. The average scores from the two media experts were 93.33 and 91.33 for graphic feasibility, and 96.67 and 93.33 for language feasibility. As for the two subject matter experts, the average scores for content feasibility were 89.41 and 88.24, for presentation feasibility were 87.50 and 90.00, and for contextual feasibility were 90.00 and 90.00. Meanwhile, the average score from the students during the pilot study was 89.06. The results of this research indicate that the development of the Earthquake Technology e-module using the ADDIE method has resulted in an e-module with "very good" category in terms of media and "good" category in terms of content. The assessment results from students also indicate that the Earthquake Technology e-module falls into the "good" category. So, it can be concluded that the Earthquake Technology e-module based on video and augmented reality can be totally implemented in the learning process of Earthquake Technology course at higher education institution