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International Journal of Research in Vocational Studies (IJRVOCAS)
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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Numerical Investigation on Characteristics of Fluid Flow Over Cavity in a Parallel Channel at Low Reynolds Numbers Nguyen Hung Khanh; Lanh Le Thanh; Thoi Le Nam
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 2 No. 2 (2022): IJRVOCAS - August
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v2i2.66

Abstract

The database management output system is interesting and available in the numerical analysis of fluid flow, especially for a fluid flowing past a cavity inside a channel. The aim of the current study is to investigate numerical simulations characteristic of fluid flowing over a cavity in a parallel channel at low Reynolds numbers and to predict reduced energy. Computer Fluid Dynamic (CFD) is utilized to solve two-dimensional low Reynolds Navier-Stoke equations with support from Gambit software, which incorporates a simulation modelling suite in the meshing model. The numerical simulations were carried out by fluid such as water for the Reynolds numbers of 50 and 1000 and for cavity aspect ratio, W/H, of 1/3, 1/2, 1, 2, and 3. The normal mean velocity input is unity. This investigation indicated that changing cavities aspect ratio influences vortex flow significantly. Besides, the study found that the aspect ratio of cavities and Reynolds numbers influence total pressure and temperature output significantly and are important for most fluid dynamic problems. Finally, the optimal reduced pressure in a channel and optimal design cavities geometries yield better results.
Assess the Level of Smooth and Stable of the Suspension when Convert from Mechanical Suspension to Air Suspension Huy Nguyen Huu; Thoi Le Nam; Lanh Le Thanh
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 2 No. 2 (2022): IJRVOCAS - August
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v2i2.86

Abstract

This report illustrates the result of the calculation of the level of smoothness and stability of the bus when converting suspension from mechanical suspension to air suspension. The mechanical vibrations of the automobile in the moving process include amplitude, frequency, and acceleration. These factors may affect the safety of goods and the human state on the bus. This result also shows the great strengths of air suspension over mechanical suspension so that the requirement of a smooth level of movement is guaranteed which is a good condition to rise the safety of goods in the bus, maintain human health, and reduce physical fatigue and psychological tiredness of drivers and passengers.
Analysis of Carbon Monoxide (CO) Quality Due to the Construction of the Miftahun Najah Islamic Boarding School Muhamad Fadli; Peppy Herawati; Hadrah; Endi Adriansyah; Rifqi Sufra; Muhammad Syaiful
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 2 No. 2 (2022): IJRVOCAS - August
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v2i2.101

Abstract

Air pollution comes from construction activities in the development of educational infrastructure buildings because it has an impact on changes in green open space and an increase in air pollution, especially Carbon Monoxide (CO) emissions in the air. The contribution of increasing CO2 and CO emissions can be sourced from all activities of workers who use energy such as procurement of building materials, use of transportation fuels, electricity use activities, and LPG use activities. Carbon footprint is a measure of the total amount of carbon dioxide (CO2) emissions that come from activities or accumulations from daily activities. This study aims to determine the amount of carbon Monoxide (CO) and CO2 emissions as indicators of air quality at the Miftahun Najah Islamic Boarding School. Measurement of Carbon Monoxide (CO) parameters was carried out for one week with 7 samplings in the morning and samplings in the afternoon in situ. Measurements using the Lutron GCO-2008 CO meter and carbon footprint calculations using the IPCC 2006 method. The measurement results were obtained in the afternoon with a total of 9,926 mg/Nm3 and the lowest in the morning was 1,102 mg/Nm3. Air temperature in the morning to evening ranged from 29oC – 36oC. The results showed that the concentration of Carbon Monoxide in the development of Islamic boarding school buildings was still below the quality standards set according to Government Regulation No. 22 of 2021, namely10,000 μg / Nm3.
IoT Monitoring for Solar Powered Pump Applied in Hydroponic House Yurika Islamiati; Tresna Dewi; Rusdianasari
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 2 No. 2 (2022): IJRVOCAS - August
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v2i2.102

Abstract

Photovoltaic systems are used and utilized as electricity needs in many developed countries, including Indonesia. Currently, photovoltaic systems are an alternative source of electricity that is cheap, affordable and easy to apply in public facilities to use in laboratories. Public and government awareness of the decline in fossil fuels and pollution caused by the use of conventional power plants increases the application of renewable energy as an alternative greening in Indonesia. Technology is growing rapidly from year to year, one of which can be seen in the world of agriculture. This development has resulted in reduced farming land, especially in urban areas. So, there are several innovations that have emerged to increase crop productivity. With these problems, hydroponic techniques can be combined with IoT (Internet of Things) technology. The use of IoT is increasingly being used both on devices and in products that require connections such as wireless sensors, smart meters, and home automation systems. The quality of an IoT product can be seen from several parameters, namely low power consumption, longer range, wireless connectivity and higher data processing capabilities. IoT can be interpreted as communication between one device and another using the internet. This study provides recommendations for the utilization of PV system applications in the use of hydroponic plants and will display the results of data measurements in the field and discuss data on measuring battery voltage, current, power, solar panel voltage, solar current panels and irradiance.
Characterization Biofuel from Empty Fruit Bunch through Thermal Cracking Daya Wulandari; Rusdianasari; Muhammad Yerizam
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 2 No. 2 (2022): IJRVOCAS - August
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v2i2.104

Abstract

Empty Fruit Bunches (EFB) are oil palm waste that has the potential as a source of bioenergy because it contains lignocellulose (cellulose, hemicellulose, and lignin) so that it can be converted into biofuel through thermal cracking, adsorption, and distillation processes. Thermal cracking is the decomposition of the chemical content of biomass by utilizing heat without a mixture of oxygen at a temperature of 200oC–600oC. This study aims to obtain the characteristics of the raw material of EFB in the form of proximate, ultimate, lignin, and biofuel produced. The research was conducted using a thermal cracking reactor designed to control the temperature at 300oC, 350oC, 400oC, and 450oC. The results showed that the raw material characteristics of EFB from proximate were 13.66% water content, 8.74% ash content, 58.66% volatile matter and 18.90% fixed carbon. This water content is relatively high. This is because the drying process on the material has not run perfectly. The ultimate result showed that the EFB had a C content of 54.45%, H content of 5.00%, and O content of 16.27%. The atomic ratio obtained from the ultimate analysis can indicate the amount of calorific value that can be used for certain fuels. The smaller the atomic ratio value contained, the more significant the calorific value contained in a particular fuel. Klason method was carried out to decrease the level of lignin through 4 stages; the lignin content without delignification was resulting into 24.87%, the addition of aquadest was resulting into18.71%, the addition of 5% HCl resulting into 15.34%, and 10% HCl resulting into 14.49%. Delignification of 10% HCl is the pretreatment process before the thermal cracking. The thermal cracking process forms steam; the steam is then condensed to obtain bio-oil. The formed bio-oil was kept to separate the oil from tar. In order to obtain good biofuel quality, adsorption is carried out with zeolite adsorbent, which has been activated with HCL. A comparison of the physical properties of bio-oil before and after adsorption shows a color difference from brownish black to the adsorbed bio-oil, which is distilled to separate the heavy and light fractions. The temperature of 450oC at thermal cracking is close to optimum; when the temperature is increased, the cracking process will be more straightforward and occur optimally. The biofuel produced in this study was tested for its characteristics such as, density (927-1086.68 Kg/m3), kinematic viscosity (1.17-1.43 mm2/s), and flash point (66.00-70, 23oC). The biofuel product produced is dominated by C5-C15 compounds (45.07%) according to the results of GC-MS analysis.
Temperature Decreasing Circulation of Solar Panels Using Water Flow Rosita Efriyanti; Ahmad Taqwa; Fatahul Arifin
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 2 No. 2 (2022): IJRVOCAS - August
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v2i2.106

Abstract

This study aims to provide a clear picture of the efficiency of using solar panels as an alternative energy source compared to conventional energy, as well as to keep the temperature of the solar panels stable. Where the solar panel itself has a maximum body and temperature that affects the results of the solar panel. Solar panels experience a decrease in their ability to generate electricity when they overheat or exceed their effectiveness limits. Therefore, seeing the effectiveness of solar panels working at a temperature of 25 degrees Celsius, there is a desire to take advantage of the excess heat generated from solar panels by cooling the solar panels by flowing water through a capillary tube. Where the experimental results can be seen in the graph of solar panels that have not used cooling. showed a decrease in the absorption of solar panels, precisely at 11.30 am and had a voltage of 20.2V with a temperature of 3.1℃. shows a decrease in the power produced on the day of the study where at 11.30 am there was a decrease in power to the voltage from 20.4V to 19.00 V and it can be said that this was caused by an increase in temperature in three days which was also influenced by the heat earlier.
Utilization of Solar Energy in the Substation Energy in Provider Connected to PT. PLN (Persero) Based on IoT Syanno Revy; Ahmad Taqwa; Fatahul Arifin
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 2 No. 2 (2022): IJRVOCAS - August
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v2i2.108

Abstract

In organizing the Asian game event in Palembang in 2018, PT PLN Persero supported this activity by supplying electricity at several points in the Jakabaring Spot City (JSC) area with a total of 27 connecting substations with a loop system, but when the event was over the loop system was turned off and several locations of connecting substations. not deactivated due to operational constraints and the absence of activities at the location resulting in the supply to the substation shutting down but still operating distributing a voltage of 20 to several substations that are still operating in the JSC area, Indonesia has a very large renewable energy potential, especially solar energy which can supply a heater to maintain humidity prevent partial discharge and make cubicle equipment have a long lifetime. The results show that the radiation received by the PV system is sufficient to produce Stable electric power to turn on the heater continuously for 24 hours Future research will be extended to monitoring via IoT.
Always Better Control Method as Controlling for Medicine Inventory in Public Health Office Marliza Noor Hayatie; Astia Putriana; Gati Anjaswari
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 2 No. 2 (2022): IJRVOCAS - August
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v2i2.110

Abstract

The purpose of this study is to control medicine supplies with the implementation of the Always Better Control (ABC) method in the Pharmaceutical Field of the Tanah Laut Regency Health Office. The availability of the medicine is part of the assessment the level of patient satisfaction with the health services of government agencies. Therefore, control of medicine supplies is important to do well so as not to cause financial losses to the country due to the accumulation of expired medicine in the inventory warehouse. This research is quantitative descriptive research. The data collected is primary data in the form of reports on medicine intake and medicine expenditure at the Tanah Laut Regency Health Office from January to December 2019. Numerically analyze data using the microsoft excel program. The results of this study showed that using the ABC method, the supply of medicine can be classified into three levels. Medicine that belongs to group A are types of medicine that are classified as having high use or sales (fast moving) as many as 6 types. Medicines that belong to group B are types of medicine with moderate sales of 6 types. Meanwhile, for medicine that belong to group C is a type of medicine whose sales are low (slow moving) as many as 8 types. The existence of medicine control with the ABC method provides convenience for management to consider the right investment value in ordering medicine needed by the people so as to improve the financial performance of the institution.
Liquidity and Solvency PT Electronic City Indonesia Tbk for the Period of 2016-2019 Radna Nurmalina; Mufrida Zein; Yuli Fitriyani; Tri Atmini Rahayu
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 2 No. 2 (2022): IJRVOCAS - August
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v2i2.112

Abstract

This study aims to determine the company's financial performance in fulfilling short-term and long-term obligations of the company PT Electronic City Indonesia Tbk. The analytical technique used in this research is quantitative analysis. The data used in this study is in the form of the financial statements of the company PT Electronic City Indonesia Tbk for the period 2016-2019 which is measured using the liquidity ratio and solvency ratio. The results of the analysis on the level of liquidity in terms of the Current Ratio, the ratio is above the industry standard so the company is in good condition. Judging from Quick Ratio, the ratio has increased from below the industry standard to above the industry standard. Judging from the Cash Ratio, the ratio numbers have increased and decreased, so that at a certain period the company was in a bad condition, namely in 2018 the cash owned by the company decreased. Judging from the cash turnover ratio, the ratio is below the industry standard, so the company's financial performance is in good condition because the smaller the ratio, the better for the company. in terms of Inventory to Net Working, the ratio is above the industry standard, although it decreases every period. The results of the analysis on the level of solvency in terms of the Dept. To Equity Ratio, the ratio is below the industry standard, which indicates that the condition of the company is in good condition, because the smaller the ratio, the better for the company. Judging from the Dept. To Asset Ratio, the ratio is below the industry standard, which means the company is in good condition. Judging from Long Term to Equity Ratio, the ratio is below the industry standard, which means the company is in good condition. Judging from the Tangible Assets Debt Coverage, it shows that the company's condition is in good condition because the total long-term debt can be repaid with intangible fixed assets owned by the company, based on the results of effective solvency, the company's financial performance can be said to be good.
Developing a Video Script for the Three Unique Chinese Temples as Tourism Destination in Palembang Achmad Leofaragusta; Nurul Aryanti; Aisyah Shahab; Muhammad Sabari
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 2 No. 2 (2022): IJRVOCAS - August
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v2i2.114

Abstract

This research was aimed at designing a video script to promote three Chinese temples in Palembang. In this study, the writers used the research and development (R&D) method. The writers conducted five steps of the R&D method: 1) Preliminary investigation; 2) Designing; 3) Realization/construction; 4) Testing, revising, and evaluation; 5) Implementation [6]. The writers implemented these steps by designing the product. The data were collected from documentation, observation and interview in the preliminary investigation step. In the designing step, the writers arranged the structure and content of the script and made it become the first draft as a realization step. In the testing, revising and evaluating step, the draft of the video script regarding the language, structure of sentences, and the content of the script was revised by several experts starting from tourism, linguistics, and script writing experts. In the last step, the writers made it become the final script. The script was written in English by using Celtx as the software for writing the script. The script described the uniqueness and the long history of three Chinese temples in Palembang. In addition, to design a script, the R&D method [6] was linked to the ten steps of writing a script: finding an idea, creating a plan, researching, selecting material, planning the message, arranging the structure, drafting the script, first draft and testing script, and final draft [7].

Page 6 of 23 | Total Record : 221

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