bluuebunny/crossref_metadata_2025_split huggingface dataset:
STUDI PERBANDINGAN PENGGUNAAN PANEL SURYA DENGAN TURBIN ANGIN SEBAGAI SUMBER ENERGI LISTRIK ALTERNATIF DI KAMPUS UNIVERSITAS SEBELAS MARET SURAKARTA
Authors: Muin Haziz , Wijayanto Danar Susilo , Widiastuti Indah 
Published: March 2023

<p><em>Solar and wind are sources of potential energy that are not widely used. The kinetic energy of wind and thermal energy of solar can be converted into electrical energy source. Both of these energy sources in addition to not polluting are also available in unlimited quantities.This experimental research studying the effect of the slope angle of solar panel to determine the most optimal angle and the feasibility between solar panels and wind turbines in the area of Campus V UNS. Variations of the angle that is used in this research is the angle of 18</em><em><sup>o</sup></em><em>; 24</em><em><sup>o</sup></em><em>; 30</em><em><sup>o</sup></em><em>; and 36</em><em><sup>o</sup></em><em>. The measurement is done by measuring the electrical current and the voltage of the electricity produced in solar panels as well as to measure the wind speed as a comparison to find out the electrical power generated in wind turbines.</em> <em>This research was conducted in the area of campus V UNS Pabelan for 30 days.The results showed that the power generated influenced the angle of the slope in the solar panel. The Highest power produced is 41.1 Watt at the intensity of the sunlight 120000 lux on the slope angle of solar panel is 24</em><em><sup>o</sup></em><em>, while at the slope angel of solar panels an 18</em><em><sup>o</sup></em><em>, 30</em><em><sup>o</sup></em><em>, and 36</em><em><sup>o</sup></em><em>, in respectively is 37.4; 39.7; and 38.6 Watts. This research states that solar panels produce electrical power more effective and optimal than wind turbines. The highest average of electricity power for 30 days generated by solar panels is 40.19 Watt at 11:20 a.m. while wind turbines produce the highest average of electrical power is 7.88 Watt at 15:40 p.m.</em></p>
PENGARUH PEMANASAN BAHAN BAKAR MELALUI 2 PIPA TEMBAGA BERSIRIP RADIAL PADA UPPER TANK RADIATOR DAN PENAMBAHAN ETANOL PADA BAHAN BAKAR TERHADAP EMISI GAS BUANG MOBIL SUZUKI APV
Authors: Firdaus Ihsan , Wijayanto Danar Susilo , Bugis Husin 
Published: March 2023

<p><em>This research aims to : 1) Investigate the effect of heating fuel through radial finned copper pipe in the upper tank of the radiator exhaust emissions on cars Suzuki APV; 2) Investigate the effect of adding ethanol to the fuel pertalite against exhaust emissions on cars Suzuki APV; 3) Investigate the effect of heating fuel through radial finned copper pipe in the upper tank of the radiator and the addition of ethanol to the fuel pertalite against exhaust emissions on cars Suzuki APV; 4) Analyze the comparison between the results of the fuel mixture pertalite heating and heating fuel ethanol pertamax through two copper pipe to the exhaust emissions of the Suzuki APV. This research use you right experimental method with a comparative descriptive data analysis. The sample used is a Suzuki APV with G15A1D100006 machine number. Data were obtained from a large measurement exhaust emission levels CO and HC for 20 seconds at idle rotation with variations mix pertalite and ethanol as much as 0%, 5%, 10%, 15%, 20%, 25%, and 30% using the method without heating fuel and the use of heating fuel through a copper pipe finned radial variation fin spacing of 10 mm, 20 mm and 30 mm In the upper radiator tank. Data obtained from the research that is inserted into the table and displayed in a graph, and then analyzed. The results of this study were: 1) heating fuel pertalite in radial finned pipe through the upper radiator tank to the injection cars Suzuki APV can decrease the value of exhaust emissions of CO and HC;2) Addition of ethanol in fuel pertalite with higher levels of 0% to 20% decline in the value of exhaust emissions of CO and HC. Exhaust emissions of CO and HC to increase again in the levels of ethanolblending with levels of 25% and 30%; 3) heating fuel in a radial finned pipe through the upper radiator tank to the injection Suzuki APV car down the value of exhaust emissions of CO and HC. Value exhaust emissions lowest CO occur in the application of finned pipe distance of 10 mm with a mixture of 20% ethanol content of 19% and HC 0.3 by 2 24 to 33 ppm; 4) The value of exhaust emissions of CO and HC in blending ethanol content to 20% lower than the lowest value of the results of exhaust emissions of CO and HC pertamax pure with a value of 0.354% levels of CO and HC at 229.67 Ppm.</em></p>
INTEGRASI SWOT KUANTITATIF DAN KUALITATIF UNTUK MENYUSUN PERENCANAAN STRATEGIS BIDANG PENDIDIKAN (Studi Kasus Di Eks-Jurusan PendidikanOlahragaDan Kesehatan (JPOK) Dan Eks-JurusanIlmuPendidikan FKIP UNS Surakarta)
Authors: Musthofa Husain , Suharno Suharno , Estriyanto Yuyun 
Published: March 2023

<p class="Abstract"><em> </em><em>This study aims to determine (1) the position of the quadrant in each study program in the Ex-POK Department and the Ex-Department of Education using a SWOT analysis (2) (Strength Weakness Opportunity Threath) to plan strategic planning for the ex-POK and ex Department of Education as an effort to improve the quality of education</em><em>. </em><em>This study uses a quantitative qualitative approach with a population consisting of lecturers, students, and alumni of the last five years in each study program. The sampling technique uses purpose sampling. Data collection uses questionnaires / quisioners, observation and documentation. Data analysis using flow model techniques</em><em>.</em><em> The results showed that the Primary School Teacher Education Program, Guidance and Counseling and Physical Education, Health and Recreation Education were in quadrant I using a progressive planning strategy in the three study programs based on the results of the SWOT analysis: (1) HR capacity improvement. (2) Making the student achievement program (the most outstanding student) a superior program for students. (3) Implement curriculum in a disciplined and responsible manner. (4) Increasing international journal publications for elementary school teacher education study program lecturers. (5) Periodically improve maintenance of infrastructure. (6) Conduct an analysis of budget requirements to draft a budget. (7) Applying work based learning in student learning. (8) Develop a clear SOP for the study program management organization. (9) Improve communication between universities and the world of work. (10) Improve the performance of the multimedia team and information in the study program. (11) Improving cooperative relations with partner institutions. (12) Establish cooperation with the government in the regions to distribute study program graduates.</em><em></em></p><p class="Abstract"><em> </em></p>
PENGARUH PENGGUNAAN VAPOR CARBURETOR METODE BUBBLING DAN VARIASI BAHAN BAKAR TERHADAP EMISI GAS BUANG PADA MOTOR SUPRA X
Authors: Usman Dedi , Ranto Ranto , Rohman Ngatou 
Published: March 2023

<p><em>The objectives of this study were: (1) To investigate the effect of using the Vapor Carburetor Bubbling method on exhaust emissions produced on the Supra X 100 CC motorcycle in 2003, (2) To investigate the effect of using pertalite and pertamax fuels on exhaust emissions in the motorcycle. Supra X 100 CC motorcycles in 2003, (3) To investigate the use of the Vapor Carburetor with the Bubbling method that uses Pertamax and pertalite fuels to exhaust gas emissions on the 2003 Supra X 100 CC motorcycle. This research is a comparative quantitative research with experimental research type. This study used a 2X2 factorial research design. The sample used was the Supra X 100cc motorcycle engine in 2003 with frame number MH1KEVA153K563997 and engine number KEVAE1561218. Data obtained from exhaust emission testing using a Gas Analyzer installed on the exhaust of a 2003 Supra X 100CC motorcycle with a Conventional Carburetor and a Vapor Carburetor at idle engine speed conditions, namely 800 rpm - 1,400 rpm and variations of pertalite fuel variations (RON 90) and Pertamax (RON 92). The test time is 20 seconds after the probe on the Gas Analyzer is inserted into the exhaust. The data analysis technique used in this research is comparative quantitative descriptive. The exhaust emission test was carried out at the Surakarta Work Training Agency (BLK).The results obtained from this study are: (1) The use of the Vapor Carburetor in the Bubbling method produces lower exhaust emissions compared to the Conventional Carburetor on the Supra X 100cc motorbike in 2003. (2) The type of pertalite fuel produces less exhaust emissions in the motorcycle. appeal to Pertamax. (3) The interaction effect of using the type of carburetor and the type of fuel that produces the lowest exhaust gas emissions is the combination of the use of the Vapor Carburetor with the bubbling and pertalite methods, namely 0.43% CO and 280 ppm HC.</em></p><p> </p>
HUBUNGAN LINGKUNGAN FISIK BENGKEL DAN BUDAYA KERJA TERHADAP HASIL BELAJAR PRAKTIK PEMESINAN BUBUT SISWA KELAS XI SMK MUHAMMADIYAH 1 GONDANGREJO
Authors: Fanani Afrizal Rosyid , Harjanto Budi , Estriyanto Yuyun 
Published: March 2023

<em>This study aims to: (1) Determine the relationship of the physical environment of the workshop on the learning outcomes of lathe machining practices of class IX students in Vocational High School of Muhammadiyah 1 Gondangrejo; (2) Determine the relationship of students' work culture on learning outcomes of lathe machining practices of class IX students in Vocational High School of Muhammadiyah 1 Gondangrejo; and (3) Determine the relationship of the physical environment of the workshop and work culture on the learning outcomes of lathe machining practices of class IX students in Vocational High School of Muhammadiyah 1 Gondangrejo. This research is a quantitative study, with a research method that is ex-post facto. The variables in this study are the physical environment of the workshop and work culture as independent variables and the learning achievement of machining lathe as the dependent variable. The population in this study is class XI students of the Mechanical Engineering expertise program in Vocational High School of Muhammadiyah 1 Gondangrejo with 157 students. The sample in this study is 79 people. Retrieval of data used questionnaire and documentation methods. The data obtained were analyzed by multiple regression analysis. The results of this study are: (1) The physical environment of the workshop has a positive and significant relationship on the learning outcomes of lathe machining practices of class IX students in Vocational High School of Muhammadiyah 1 Gondangrejo with a effective contribution of 16.6% to the high student learning outcomes (2) Work culture has a positive and significant relationship on the learning outcomes of lathe machining practices of class IX students in Vocational High School of Muhammadiyah 1 Gondangrejo with a effective contribution of 18.3% to the high student learning outcomes and (3) The physical environment of workshop and work culture has a positive and significant impact on learning achievement of lathe machining practices the learning outcomes of lathe machining practices of class IX students in Vocational High School of Muhammadiyah 1 Gondangrejo with a effective contribution of 34.9% to the high student learning outcomes.</em>
PROSES PEMBUATAN MESIN PENGEPRES SERBUK KAYU UNTUK MEDIA PEMBIBITAN JAMUR
Authors: Aryanto Dhani 
Published: March 2023

<p><em>Oyster mushroom cultivation business is very tempting. From a financial point of view, it can be said that this business is feasible to run. Especially for hobbyists or entrepreneurs, this business is quite fun and interesting. If we observe, the interest in this cultivation business continues to increase from year to year. Of course, there are many factors that are the reason for the increasing interest in this business, ranging from just a hobby, the mushroom factor as a healthy food or mushrooms as a future food. That means this business will continue to grow for a long time.</em></p><p><em>From the above, it can be concluded that the development of a business cannot be separated from the existence of appropriate technology. So it takes a pressing machine to compact the planting media in the form of a mixture of sawdust. In a site survey to a place for making consumption mushroom growing media. The pressing process is still manual, but there is also a machine. Pressing with the machine is still at risk of pinching the hand so that it can slow down the production process. Therefore, the risk of making this pressing machine is minimized and the automatic production process can run smoothly so that more results are obtained.</em></p><p><em> </em><em>The machine works up and down by using the clutch lever, pressing the sawdust with a specified density level, namely the initial height of 230 mm to 190 mm.</em></p><p> </p><p><em>Keywords: Pressing Machine, Mushroom</em><em></em></p>
UPAYA MENINGKATKAN PRESTASI BELAJAR SISWA DENGAN MEDIA MODUL PADA MATA PELAJARAN KERJA LAS DI SMK NEGERI 2 KEBUMEN
Authors: Muzani Akhmad , Marwanto Arif 
Published: March 2023

<p><em>This study aims to determine the effect of using the module on students' learning motivation in the subject of welding work. At the same time, to determine the effect of using the module on student achievement in welding work subjects at SMK Negeri 2 Kebumen.</em><em> </em><em>The method used in this study is a research method experiment, the implementation of which uses a quasi-experimental type with a nonequivalent control group design. The research was conducted at SMK Negeri 2 Kebumen with a sample of 2 classes, namely class XI TP 1 as a group experiment, class XI TP 2 as the control group. To determine the motivation to learn data collection using observation sheets and questionnaires. While to determine learning achievement data collection in the form of test results carried out before and after the learning process (pretest and posttest).</em><em> </em><em>The process of teaching and learning activities in the experimental class uses a module entitled Welding Classroom with the SMAW Process, while the control class uses a lecture learning strategy (conventional). The results showed that the effect of using the module on students' learning motivation is categorized as very high/very positive. Proven from the results of the overall student motivation questionnaire mean is 90.41 and the results of observations with the answer "YES as much as 25. The effect of using the module on student achievement is to improve learning outcomes. It is evident from the experimental class learning outcomes at the pretest, the mean is 52, the median is 52.5, the mode is 46, the highest score is 69, and the lowest score is 34. After using the module, the mean 83, median 83, mode 83, the highest score 97, and the lowest score 60. Calculation of the independent sample test t test with an error rate of 5% shows that t table &lt; tcount (1.669 &lt; 3.619). It was decided that there was a significant difference There is a significant difference between the learning outcomes of the experimental class using module media and the conventional learning control class.</em></p><p> </p>
Pengaruh Desain Magnet Pada Rotor Generator Dan Variasi Kecepatan Angin Terhadap Energi Listrik Yang Dihasilkan Oleh Turbin Angin Sumbu Horizontal Skala Mikro
Authors: Albab Mohamad Ulil , Bugis Husin , Saputro Herman 
Published: March 2023

<p><em>Energy use in Indonesia is increasing while energy reserves in Indonesia are running low. In an effort to meet energy needs in Indonesia, there must be the development of renewable energy sources by utilizing wind energy to be converted into electrical energy using a horizontal wind turbine generator. To optimize the wind turbine generator, you can change its parameters, one of which is by changing the design of the generator magnet.</em></p><p><em> The method used in this study is an experimental method, where the variables used in this study are the design of the magnet skew, the design of the interior magnet and the design of the magnet surface. This research was conducted at wind speeds of 1 m/s to 5 m/s using a wind tunnel. Tests were carried out using 12 V and 24 V lamp loads and no-load tests to determine the power generated by each generator.</em></p><em> The results of the research are the design of the magnet on the generator rotor and variations in wind speed affect the power produced by the wind turbine, the magnetic skew produces a power of 0.974 W, the interior magnet produces a power of 0.674 W and the surface magnet produces a power of 1.386 W. Tests without load and speed variations The wind affects the power produced by the wind turbine, where the power at the generator cannot be calculated. Tests with loading and wind speed variations affect the power produced by the wind turbine, where each loading test has various results such as when a load is given to the magnetic surface design at a wind speed of 5 m/s with a loading of 24 V producing a power of 1.386 W.</em>
Studi Penelitian Panjang Kritis Serat Alam Dengan Perlakuan Perendaman Natrium Hidroksida
Authors: Ramadhan Rangga Yanuarestu , Estriyanto Yuyun , Harjanto Budi 
Published: March 2023

<em>The purpose of this study was to determine the critical length of palm fiber, kenaf fiber, pineapple fiber, agave fiber, and coconut fiber with NaOH immersion treatment. This study was determine the effect of NaOH immersion treatment on the critical length of fiber. This research is an experimental exploratory research. The independent variables in this study were palm fiber, kenaf fiber, pineapple fiber, agave fiber, and coconut fiber with the dependent variable is the critical fiber length. To find the critical length of fiber using single fiber tensile test and single fiber pull out test. The data obtainde from the test results are then analyzed using formula equation to determine the critical length of each fiber. Data analysis techniques using quantitative descriptive analysis techniques. The results showed that the critical length of palm fiber, kenaf fiber, agave fiber, and coconut fiber with NaOH immersion treatment was shorter than the critical length of fiber without NaOH immersion treatment. Agave fiber has the shortest critical fiber length. The critical length of the fiber with NaOH immersion treatment are palm fiber 4.6 mm, kenaf fiber 5.4 mm, pineapple fiber 3.6 mm, agave fiber 2.2 mm, and coconut fiber 3.0 mm. </em>
Gas Lift Performance Enhancement Strategies by Downsizing and Using Dummy and Venturi Valves: A Paradigm Shift in Gas Lift Systems Management Philosophy
Authors: Akeil Wael Farag , El-Bohoty Ahmed Mahmoud , El-Mawla El-Sayed Ibrahim Abd , El-Dessouky Mohamed El-Hussien , Mohamed Islam Ibrahim , Darwish Abd Allah Magdy , Khalil Ahmed Kamal 
Published: March 2023

Abstract
Gas lift is a flexible artificial lift method, which requires continuous monitoring to identify diverse ways of production optimization. Gas lift systems optimization is a dynamic process throughout well production life in order to maximize the overall field production. Traditional gas lift valve installation standards were replaced by a new strategy, at which valves were converted to smaller port sizes, dummy and Venturi ones. A mature offshore field, with more than 460 gas lifted wells and limited gas availability, undergoes depletion phase. Most of the gas lift design bases were initiated during the production start-up and has standardization set of large gas lift valve port sizes with narrow spacing. Inconstancy of the well flow condition during reservoir depletion added complications to the system and made its operability incompatible with the initial design. Therefore, a screen-out model was created to select candidate wells for downsizing and for dummy and Venturi valves changing-out. After screening, 70 wells were selected for applying the new strategy.
A successful optimization in gas lift system was carried out after selecting 70 candidate wells. The gas lift valve change-out (GLVCO) operation included changing valves from normal unloading valves to dummy ones, downsizing to smaller port sizes, changing valves from edge-orifice operating to Venturi valves and applying new gas lift design approach in order to increase closing pressures of shallower valves by considering ambient the temperature effect. Improvement in wells performances was evaluated using real-time monitoring system, multi-phase flow meters and portable well testing package. Applying the new strategy resulted in exceptional improvements in 47 wells by injecting gas from deeper valves, decreasing the downstream pressure to prevent re-opening of shallower valves, optimizing gas lift injection rate and enhancing gas lift system stability. Accordingly, more than 7000 BOPD were added to the production stream and led to saving more than 10 MMSCFPD of injection gas to be used for other wells and mitigating flow assurance difficulties regarding scale precipitation due to excessive cooling.
This paper reveals the effectiveness of smaller port sizes, dummy and Venturi valves in enhancing the gas lift performance and maximizing the recovery. It provides an improvement philosophy for managing the gas lift wells from the design concept to field application.
Well Logs Interpretation Using Machine Learning Workflow
Authors: Al-Ali Zainab Hussain 
Published: March 2023

AbstractWell logs are used to measure acoustic, nuclear, or conductive properties of the subsurface. In turn, these properties are interpreted based on some physical correlations to compute essential reservoir characteristics such as porosity and water saturation. Most of these physical calculations require a pre-knowledge of the reservoir fluid and rock properties as well as domain knowledge experts and petrophysicsts. This process could also be time consuming and inconsistent due to measurement anomalies and expertise bias. Recent advances in artificial intelligence have produced a paradigm shift in the industry from using traditional physics-based methods to adopting modern data-driven models to reduce physical complexity, improve speed and accuracy. Many research aspects are now focused towards using machine and deep learning models to improve well logs analysis covering many aspects including: detecting anomalies, classification of lithology and automated prediction of reservoir parameters. This paper presents a modern approach of using machine learning modeling workflow for well log interpretation combining both unsupervised and supervised learning technique. The presented model is capable of efficiently predicting several reservoir properties including, water saturation, volume of shale and porosity, without the pre-knowledge of complex physical rock and fluid characteristics.