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International Journal of Research in Vocational Studies (IJRVOCAS)

ijrvocas
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Published by Yayasan Ghalih Pelopor Pendidikan

ISSN : 27770168 EISSN : 27770141 DOI : https://doi.org/10.53893/ijrvocas.v1i1

Core Subject : Economy, Science, Education, Social, Engineering,

Aerospace Engineering Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

The International Journal of Research in Vocational Studies (IJRVOCAS) is a double-blind peer-reviewed journal. This journal provides full open access to its content on the principle that making research freely and independently available to the science community and the public supports a greater global exchange of knowledge and the further development of expertise in the field of vocational education and training (VET). IJRVOCAS is since the beginning independent from any non-scientific third-party funding. The establishment of the journal was supported between 2015 and 2016 with grants from the Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation). All members of IJRVOCAS work on an honorary basis. The journal is hosted by Ghalih Publishing and the publishing house of the Ghalih Academic. Scope IJRVOCAS covers all topics of VET-related research from pre-vocational education (PVE), initial vocational education and training (IVET) and career and technical education (CTE) to workforce education (WE), human resource development (HRD), professional education and training (PET) and continuing vocational education and training (CVET).

Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)

Articles 221 Documents

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An Empirical Case Study of DEMATEL Method Focus on Calculating the Students Organization Improvement in POLITALA Titik Wijayati; Mufrida Zein; Muhammad Ghalih; Muhammad Fajar
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 1 No. 1 (2021): IJRVOCAS - April
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

The single-mindedness of this study is to find the key factors prompting the Students Organization Improvement and explore the causal relationships between perspectives (P) and criteria (C). This case study used Decision-Making Trial and Evaluation Laboratory (DEMATEL) method used for making decisions and analyses to forecast future scenarios. The results found that the DEMATEL include six main perspectives and eighteen criteria were extracted and then validated by fifteen experts. Therefore, the most critical evaluation perspective with the most exceptional value was 11.4074, although Availability (P4) was the least essential perspective with the smallest value 7.0138. Regarding value, the prioritization of the importance of four evaluation perspectives numbered from perspectives P1 to perspectives P4. Finally, the proposed methods not only improve the DEMATEL methodology but also provide a valuable reference to do the best planning for Calculating the Students Organization Improvement in POLITALA.

Syngas Underground Coal Gasification (UCG) Testing of In-Situ Type Lignite Coal and Fracture Type Coal Julismi; Rusdianasari; Abu Hasan
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 1 No. 2 (2021): IJRVOCAS - August
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

The advancement and utilization of technology require energy, namely electricity and fuel energy. The increasing cost of fossil energy, the scarcity of non-renewable energy sources and the increasing energy demand requires diversification of energy resources. One of the new renewable energy sources currently being developed in Indonesia is Underground Coal Gasification (UCG). UCG is a new technology that utilizes unmined coal. In the UCG process, coal is burned underground and the syngas produced is collected through bore wells for processing or direct use. The resulting syngas is analyzed to see the effect of in-situ type of lignite coal and fractured type of coal on syngas production using the UCG method. Tests carried out on fracture-type lignite coal for 120 minutes with a sample weight of 1.3 kg obtained a CH4 gas concentration of 0.24%, which is relatively low compared to the in-situ type lignite coal sample CH4 gas concentration of 1.13%. The CO2 concentration was 54.46% in the fracture sample, and the In-Situ type sample was 52.19%. The O2 content with a value of 19.43% for the Fracture Type sample and 4.94% for the In-Situ type sample. Fracture Type and In-situ Lignite Coal produced fewer syngas products due to UCG testing than high-rank coals such as sub-bituminous and bituminous coal.

Automatic Control System for Hybrid Electrical Energy Supply Based on Internet of Things M. Edwin Syah Effendy; RD Kusumanto; Carlos RS
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 1 No. 2 (2021): IJRVOCAS - August
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

The utilization of renewable energy is slowly starting to become one thing that to be interesting inside the development of science technology. The utilization of renewable energy is from at least two renewable energy (Solar Power Plants and Wind Power Plants), State Electricity Enterprise (PLN), and Generator Sources. This device could be operated automatically and integrated on the internet, which has a monitoring system such as voltage, inside which will be used to control everything inside that system. This device is designed to be operated in a combinational manner. This means to be operated based on the voltage value which qualified to activate the load. The utilization of the 3.3V microcontroller is able to design an efficient and low-cost board. Besides that, the device also uses the PLN and Generator set sources as the power backup when the main power runs out. Base on the research noted, this device will distribute the electric source to the houses, which means beneficial for the local society. This device might be applied automatically to four different sources with C++ Programming language to set the point value.

Automatic Cleaning System Design to Increase PV Panel Output Power Muhammad Zulfahmi; RD Kusumanto; Yohandri Bow
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 1 No. 2 (2021): IJRVOCAS - August
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

The existence of the Township Housing, which is currently near the coal mine site, precisely in Tanjung Enim, South Sumatra, with a relatively open area (41 Ha) and a relatively high elevation of approximately 100 meters over the sea level, has the potential to be installed with PV panels as a solar power plant. Installation of PV panels in residential areas close to coal mining activities has the potential to indirectly generate a lot of mine dust which can reduce the amount of light received by the PV panels, which in turn can affect the output power of the PV panels. The purpose of this study is to analyze the use of an automatic cleaning system to increase the output power of PV panels by comparing the output power of PV panels produced between PV panels with an automatic cleaning system in the form of a water sprayer with PV panels that are not equipped with a water sprayer (standard PV installation). The use of an automatic cleaning system shows an increase in the average output power of 44.56 Watt. The difference between Isc PV water sprayer and normal PV is 0.5513 A. Iload measurement on PV water sprayer is 0.1973 A higher than normal PV, while for VOC PV panel water sprayer is smaller than normal PV is about 0.45 V. For PV water sprayer Vload is 0.431 V is more significant than normal PV panels. Meanwhile, for the generated load power or Pload, the PV water sprayer is 9.47 watts higher than normal PV. From all these values, the average efficiency produced by PV water sprayer is 1.81% greater than the efficiency produced by normal PV. This study shows that PV using a water sprayer produces an average output power of 44.56 watts

Syngas Underground Coal Gasification (UCG) Testing of Fracture Type Subbituminous Coal in Laboratory Scale: Underground Coal Gasification (UCG) Joniken Lesmana; Abu Hasan; Aida Syarief
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 1 No. 2 (2021): IJRVOCAS - August
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Underground Coal Gasification is a method used to convert underground coal seams into a gaseous product commonly called synthetic gas through a flammable chemical process without going through a conventional mining process. The UCG concept was first developed in England which was then continued by the Soviet Union in field trials of UCG which was used as a power plant. In Indonesia, Tekmira has begun to research UCG, but there are very few publications on UCG. Therefore, it is necessary to conduct research on laboratory scale UCG for analysis of gas products to support the study of renewable energy. UCG testing begins with sample preparation followed by laboratory-scale coal gasification testing. There is a sample of coal used in the test, namely Subbituminous Coal from Tanjung Enim, South Sumatra. Initial combustion is carried out by flowing propane gas into the reactor tube using a burner. Furthermore, a mixture of oxygen gas and compressed air is used to keep the coals burning. After obtaining the gas from the combustion, then gas sampling is carried out using a suction pump which will be stored in a tedlar gas bag. Combustion gas products will be checked for syngas concentration using a Gas Chromatography tool to determine the concentration of CH4, CO2 and O2 gases. From the tests that have been carried out, the gas concentrations of O2 are 3.67%, CO2 41.51%, and CH4 6.93%. Coal in the confined test conditions has good conditions with indications of seeing the concentration of CH4, O2, and CO2 gas.

Syngas Characteristics from UCG Gasification Process with Lignite and Subbituminous Coal Types Sarmidi; Muhammad Yerizam; Aida Syarif
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 1 No. 2 (2021): IJRVOCAS - August
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Underground Coal Gasification (UCG) is the process of converting the materials used to make synthetic gas in a feasible and economically attractive manner as a method for harnessing energy from underground coal sources. Coal gasification will produce a gas producer in the form of synthetic gas (syngas) with the main components consisting of carbon monoxide (CO), hydrogen (H2), carbon dioxide (CO2) and nitrogen (N2) and low pollutants. The highest temperature produced with MT 47 lignite coal using an oxygen velocity of 5 liters/minute was 2400 C at the 35th minute, while the lowest temperature was 950 C at the 95th minute. For Subbituminous AL 51 coal using an oxygen velocity of 5 liters/minute, the highest temperature is 3540 C at 75 minutes, while the lowest temperature is 1060 C at 130 minutes. At an oxygen velocity of 5 liters/minute the flash point / burn test is on the MT 47 lignite coal type in the 10th minute and at a temperature of 1700 C. Meanwhile, the AL 51 subbituminous coal type is in the 30th minute and at a temperature of 3130 C. Based on the discussion and analysis of data from the gasification test of lignite and subbituminous coal with variations in oxygen velocity of 5 liters/minute, the results obtained are that lignite coal burns faster (burn test) in the 10th minute at a temperature of 1700 C, in the subbituminous type it has higher temperature 3130 C and longer burn test at 30 minutes.

Analysis of the Performance of The Four-Blade Darrieus Wind Turbine at the Jamik Bukit Asam Mosque Complex Tanjung Enim South Sumatra: Analysis of the Performance of The Four-Blade Darrieus Wind Turbine at the Jamik Bukit Asam Mosque Complex Tanjung Enim South Sumatra Mustafa Kamal; Fatahul Arifin; Rusdianasari
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 1 No. 2 (2021): IJRVOCAS - August
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Several types of renewable energy have been developed, such as solar energy, biomass, hydro energy, geothermal, and wind energy. Wind energy is an up-and-coming alternative and renewable energy. Wind energy is more environmentally friendly than available energy sources and has more accessible operational and maintenance costs. Indonesia has a relatively small natural wind energy potential because the wind speed in Indonesia is on average 3-6 m/s due to its location. Geographically, it is located in the equatorial area, especially the Muara Enim area, South Sumatra. This study aims to design a prototype the four-blade darrieus type vertical axis wind turbine (VAWT) needed for the utilization of wind energy which is used for Coffee Shop electricity needs at the Jamik Bukit Asam Tanjung Enim Mosque complex, South Sumatra, with the conclusion that the wind turbine, wind turbine rotation, the magnitude of the output voltage and The current generated significantly affects the wind speed in the area.

Production of Disinfectant by Utilizing Eco-enzyme from Fruit Peels Waste Rusdianasari; Adi Syakdani; Muhammad Zaman; Febby Fitria Sari; Nabila Putri Nasyta; Rizka Amalia
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 1 No. 3 (2021): IJRVOCAS - December
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Organic waste is waste that contains carbon compounds that come from living things, such as fruit and vegetable waste. However, the community is still not able to manage it optimally, even though organic and non-organic waste can still be processed into useful products. This effective way can be realized through the manufacture of eco-enzymes that can be applied at the household level. Eco-enzyme is a liquid extract produced from the fermentation of vegetable and fruit residues with brown sugar as a substrate. The eco-enzyme has a strong sweet and sour fermented aroma due to the peels of oranges, pineapples, and papayas. This environmentally friendly enzyme can be produced using fruit peel, brown sugar, and water. Eco-enzyme solution when mixed with water, will react and can be used as a liquid disinfectant. Disinfectants commonly used are generally derived from synthetic chemicals in the form of artificial chemicals. One of the natural ingredients that can be used as a disinfectant is eco-enzyme liquid. This study aims to make a disinfectant using an environmentally friendly enzyme liquid, namely eco-enzyme. The method used in this research is a mixed method of fermentation of orange peel waste, pineapple and papaya, brown sugar, and water with a ratio of 3:1:10. Analysis for eco-enzyme pH, and Phytochemicals, while for disinfectants include pH, total phenol content with UV-Vis Spectrophotometer, hard water emulsion stability, and antibacterial test. All samples of the disinfectant product met the requirements of SNI 06 – 1842 of 1995, besides that, the best disinfectant product was found in a ratio of 1:10 which could reduce bacterial growth.

Effect of Transformational Leadership Style and Work Commitment on Employee Performance at the Regional Secretariat of Murung Raya Regency, Central Kalimantan Province Yohana; Humaidi
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 1 No. 3 (2021): IJRVOCAS - December
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

This study aims to determine the Effect of Transformational Leadership Style and Work Commitment on Employee Performance at the Regional Secretariat of Murung Raya Regency, Central Kalimantan Province. The technique used in this study is SmartPLS Analysis using the help of the SmartPLS package computer program with a significance level of 5 percent by using questionnaires as primary data. The population in this study were employees of the Regional Secretariat of Murung Raya Regency as many as 192 people with a sample of the same number as many as 192 respondents who used saturated sampling techniques, that is, the entire population was sampled. The results of this study indicate that partially transformational leadership style and work commitment have a significant effect on employee performance, this means that an increase in transformational leadership style and work commitment will improve employee performance at the Murung Raya Regency Regional Secretariat. To maintain employee performance at the Murung Raya Regency Secretariat, it can be done by using transformational leadership styles and managing work commitments. It is important to take actions that can improve work commitment and employee performance

Actualization of Digital Marketing Society 5.0 on MSMES of Sasirangan Cloth in Village Sasirangan in Banjarmasin City Tino Kemal Fattah; Putriana Salman
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 1 No. 3 (2021): IJRVOCAS - December
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Marketing is part of the main activities carried out by traders in their efforts to maintain the survival of their business to achieve business goals. Strategy is a process of determining an organizational goal, accompanied by the preparation of a way or effort how to achieve that goal. In particular, strategy is an action that is increasing and continuous and is done based on the point of view of what customers expect in the future. This research aims to find out how the actualization of digital marketing of MSMEs in the era of society 5.0. This research method uses quantitative descriptive methods with data collection techniques through questionnaire sharing. The population in this study is MSMEs Kain Sasirangan in Kampung Sasirangan Banjarmasin City. The results of this study show that Sasirangan MSMEs have used digital marketing in the process of buying and selling their products. It is recognized that the utilization of digital marketing can expand market reach and add new customers, facilitate business management with more flexible time, can be done at any time without having to open a store first, so that the profits obtained are also greater. In addition, by utilizing digital marketing, MSME sasirangan fabric actors do not need a place to sell their products, so the costs incurred are also less. Their lack of ability to use technology, only able to make them do marketing their products traditionally.

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Muhammad Ghalih

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Ghalih Foundation Office Kh. Dewantara RT.07 RW.02, Angsau, Pelaihari, Tanah Laut, Kalimantan Selatan, Indonesia. Code Pos 70814.

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Kab. tanah laut,

Kalimantan selatan

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Muhammad Ghalih

Contact Email ghalih081092@gmail.com

Phone +628125156396

Journal Mail Official ijrvocas@gmail.com

Editorial Address Ghalih Foundation Office Kh. Dewantara RT.07 RW.02, Angsau, Pelaihari, Tanah Laut, Kalimantan Selatan, Indonesia. Code Pos 70814.

Location Kab. tanah laut, Kalimantan selatan INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Muhammad Ghalih

Contact Email
ghalih081092@gmail.com

Phone
+628125156396

Journal Mail Official
ijrvocas@gmail.com

Editorial Address
Ghalih Foundation Office Kh. Dewantara RT.07 RW.02, Angsau, Pelaihari, Tanah Laut, Kalimantan Selatan, Indonesia. Code Pos 70814.

Location
Kab. tanah laut,

Kalimantan selatan

INDONESIA