International Journal of Research in Vocational Studies (IJRVOCAS)最新文献_第10页

Optimizing Basement Construction Methods 优化地下室施工方法

International Journal of Research in Vocational Studies (IJRVOCAS) Pub Date : 2021-12-26 DOI: 10.53893/ijrvocas.v1i3.62

Nguyen Huu Bao

{"title":"Optimizing Basement Construction Methods","authors":"Nguyen Huu Bao","doi":"10.53893/ijrvocas.v1i3.62","DOIUrl":"https://doi.org/10.53893/ijrvocas.v1i3.62","url":null,"abstract":"The underground part of SSG TOWER includes 4 basements, 4 basements at a height of -13.2m. Combined with the construction of 3m deep foundation, therefore, the minimum excavation depth is required to -16.2m. Due to the construction work in residential area, relatively ground, with large excavation depth and geology of the interaction area (clay layer up to 30m), the options for using diaphragm wall with drilled piles Small area, Laser piles or solier piles to make retaining walls during construction do not have that feature, so the author chooses the option of using reinforced concrete barrette walls for retaining walls during construction and as tunnel walls for this project.\u0000The semi-topdown construction method was chosen to ensure safety during construction because the excavation depth of the work is quite large and the geology of this area is quite weak. This measure completely solves the strut system because using the floor structure of the building to support this system has high stability. Limiting the influence of settlement, cracking, and slippage to neighboring works a lot. Fast construction but in return for high technical requirements, high construction costs. Choose diaphragm wall thickness of 1.0m, base depth of 46.6m including standard barrete panels.\u0000 The author uses 2D Plaxis simulation to calculate ground stability, stress and displacement, moment, and shear force generated in diaphragm wall during basement construction. The author analyzes using the optimization algorithm to compare and find the suitable solution.","PeriodicalId":14205,"journal":{"name":"International Journal of Research in Vocational Studies (IJRVOCAS)","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90390073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Online English Learning for Mechanical Engineering Students during the Pandemic: Challenges and Suggestions 大流行期间机械工程专业学生在线英语学习:挑战与建议

International Journal of Research in Vocational Studies (IJRVOCAS) Pub Date : 2021-12-25 DOI: 10.53893/ijrvocas.v1i3.63

Yulima Melsipa Lingga, Karolina

{"title":"Online English Learning for Mechanical Engineering Students during the Pandemic: Challenges and Suggestions","authors":"Yulima Melsipa Lingga, Karolina","doi":"10.53893/ijrvocas.v1i3.63","DOIUrl":"https://doi.org/10.53893/ijrvocas.v1i3.63","url":null,"abstract":"The COVID-19 pandemic has brought changes to the whole world. This pandemic also has an impact on the learning system in Indonesia. From the previous face-to-face learning to online learning, including for English courses. This study aims to elaborate on what challenges were faced by students during online English learning, and what suggestions were given to face and solve these challenges. The object of this research was the first semester students of Mechanical Engineering at the Tanah Laut State Polytechnic. There were 33 students in the Mechanical Engineering department. By using qualitative research methods from written response data and semi-structured interviews, the results showed that there were challenges in the form of unstable or poor internet connections, sudden power outages, lack of interest in learning, and even running out of internet quota while studying. Students also suggested that each material had a learning video that could be replayed at home. They also suggested giving assignments in the form of direct practice with online interaction so that it was easier to understand and corrected directly by lecturers. Furthermore, they suggested apps for more enjoyable English learning related to a machine or their field. This study provided an overview of the online English learning process for mechanical engineering students during the pandemic. It is hoped that in the future it will be able to come up with better solutions to the existing challenges.","PeriodicalId":14205,"journal":{"name":"International Journal of Research in Vocational Studies (IJRVOCAS)","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88732944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Transformational Leadership Style and Work Commitment on Employee Performance at the Regional Secretariat of Murung Raya Regency, Central Kalimantan Province 变革型领导风格和工作承诺对员工绩效的影响——在加里曼丹省中部穆隆拉雅县区域秘书处

International Journal of Research in Vocational Studies (IJRVOCAS) Pub Date : 2021-12-25 DOI: 10.53893/ijrvocas.v1i3.54

Yohana, Humaidi

{"title":"Effect of Transformational Leadership Style and Work Commitment on Employee Performance at the Regional Secretariat of Murung Raya Regency, Central Kalimantan Province","authors":"Yohana, Humaidi","doi":"10.53893/ijrvocas.v1i3.54","DOIUrl":"https://doi.org/10.53893/ijrvocas.v1i3.54","url":null,"abstract":"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. \u0000The 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","PeriodicalId":14205,"journal":{"name":"International Journal of Research in Vocational Studies (IJRVOCAS)","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75519675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study Analysis Fuel from Plastic Waste 研究分析塑料废物中的燃料

International Journal of Research in Vocational Studies (IJRVOCAS) Pub Date : 2021-12-23 DOI: 10.53893/ijrvocas.v1i3.59

Azharuddin, Dwi Arnoldi, Fenoria Putri, Kemas M. Fadhil Almakky, M. Davala

引用次数: 0

Design Manufacture of Fixture Fire Fighter Kit 夹具消防装备的设计制造

International Journal of Research in Vocational Studies (IJRVOCAS) Pub Date : 2021-12-23 DOI: 10.53893/ijrvocas.v1i3.58

Wirda Novarika, F. Arifin, Eka Satria Martomi, Indra Gunawan, Fathur Raihan Perdana

引用次数: 1

Production of Disinfectant by Utilizing Eco-enzyme from Fruit Peels Waste 利用果皮废生态酶生产消毒液

International Journal of Research in Vocational Studies (IJRVOCAS) Pub Date : 2021-12-23 DOI: 10.53893/ijrvocas.v1i3.53

Rusdianasari, Adi Syakdani, M. Zaman, F. Sari, Nabila Putri Nasyta, R. Amalia

{"title":"Production of Disinfectant by Utilizing Eco-enzyme from Fruit Peels Waste","authors":"Rusdianasari, Adi Syakdani, M. Zaman, F. Sari, Nabila Putri Nasyta, R. Amalia","doi":"10.53893/ijrvocas.v1i3.53","DOIUrl":"https://doi.org/10.53893/ijrvocas.v1i3.53","url":null,"abstract":"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.","PeriodicalId":14205,"journal":{"name":"International Journal of Research in Vocational Studies (IJRVOCAS)","volume":"54 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88415931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Syngas Underground Coal Gasification (UCG) Testing of Fracture Type Subbituminous Coal in Laboratory Scale 裂隙型亚烟煤合成气地下气化实验研究

International Journal of Research in Vocational Studies (IJRVOCAS) Pub Date : 2021-09-22 DOI: 10.53893/ijrvocas.v1i2.49

Joniken Lesmana, A. Hasan, Aida Syarief

{"title":"Syngas Underground Coal Gasification (UCG) Testing of Fracture Type Subbituminous Coal in Laboratory Scale","authors":"Joniken Lesmana, A. Hasan, Aida Syarief","doi":"10.53893/ijrvocas.v1i2.49","DOIUrl":"https://doi.org/10.53893/ijrvocas.v1i2.49","url":null,"abstract":"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.","PeriodicalId":14205,"journal":{"name":"International Journal of Research in Vocational Studies (IJRVOCAS)","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77164589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Automatic Cleaning System Design to Increase PV Panel Output Power 提高光伏板输出功率的自动清洗系统设计

International Journal of Research in Vocational Studies (IJRVOCAS) Pub Date : 2021-09-10 DOI: 10.53893/ijrvocas.v1i2.48

M. Zulfahmi, R. Kusumanto, Y. Bow

{"title":"Automatic Cleaning System Design to Increase PV Panel Output Power","authors":"M. Zulfahmi, R. Kusumanto, Y. Bow","doi":"10.53893/ijrvocas.v1i2.48","DOIUrl":"https://doi.org/10.53893/ijrvocas.v1i2.48","url":null,"abstract":"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","PeriodicalId":14205,"journal":{"name":"International Journal of Research in Vocational Studies (IJRVOCAS)","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84228201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Syngas Characteristics from UCG Gasification Process with Lignite and Subbituminous Coal Types 褐煤和亚烟煤UCG气化过程合成气特征

International Journal of Research in Vocational Studies (IJRVOCAS) Pub Date : 2021-09-07 DOI: 10.53893/ijrvocas.v1i2.50

Sarmidi, M. Yerizam, Aida Syarif

{"title":"Syngas Characteristics from UCG Gasification Process with Lignite and Subbituminous Coal Types","authors":"Sarmidi, M. Yerizam, Aida Syarif","doi":"10.53893/ijrvocas.v1i2.50","DOIUrl":"https://doi.org/10.53893/ijrvocas.v1i2.50","url":null,"abstract":"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.","PeriodicalId":14205,"journal":{"name":"International Journal of Research in Vocational Studies (IJRVOCAS)","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84610063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

The Investigation of Savonius Type and Darrieus H Type Wind Turbine Simulation with Wind Speed Variable 考虑风速变化的Savonius型和Darrieus H型风力机仿真研究

International Journal of Research in Vocational Studies (IJRVOCAS) Pub Date : 2021-09-02 DOI: 10.53893/ijrvocas.v1i2.18

Wibby Aditya Putra Utama, Y. Bow, M. Yusi

引用次数: 0