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All Journal JRTI (Jurnal Riset Tindakan Indonesia) Makara Journal of Technology Journal of Sustainable Agribusiness Jurnal Greenation Sosial dan Politik LEOTECH: Journal of Learning Education and Technology
Ridwan Gunawan
University of Indonesia
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Social Sciences Other

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Design of Induction Motor Drive Without Velocity Sensor Using Current Vector Controller with Full and Reduced Observer Moving to DQ Axis Gunawan, Ridwan; Yusivar, Feri; Wahab, Wahidin; Kadir, Zuhal A.
Makara Journal of Technology Vol. 10, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Design of Induction Motor Drive Without Velocity Sensor Using Current Vector Controller with Full and Reduced Observer Moving to DQ Axis. The observer is used in estimation velocity sensor usually in α-β axis, therefore this situation will need an extra transformation when we want to add compensator because the flux model is in direct and quadrature-axis dq. Every used the transformation to make possible emerge an error. So in this simulation is used a method to estimate the velocity of induction motor drive with observer that is moved to dq-axis. The model of actual motor used is in alfa-beta axis, but the observer use the motor models in rotor flux oriented control (RFOC).This matter, also to prove that the different models of motor drives can be used between the actual and estimated one. The simulation results with C-MEX S-function Matlab/Simulink 6.5 to show that the full order observer in dq axis gives better performance than the reduced order observer.
Interoperabilitas antar matra dalam skema perang berlarut Nakir, M; Prayitno, Arief; Gunawan, Ridwan
JRTI (Jurnal Riset Tindakan Indonesia) Vol 8, No 1 (2023): JRTI (Jurnal Riset Tindakan Indonesia)
Publisher : IICET (Indonesian Institute for Counseling, Education and Therapy)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (494.279 KB) | DOI: 10.29210/30032505000

Abstract

The discourse on the development of the military strategy nowdays is inseparable from the globalization. Defense experts are faced with an increasing trend of international system instability and it is increasingly difficult to predict. The presence of new technology also influences the characteristics of modern conflicts where future wars are becoming increasingly complex. In general, wars are planned by the aggressor for a short period of time in order to achieve victory quickly, however, the little ones force long-lasting wars as protracted wars. This study uses a qualitative method with a descriptive design. The purpose of this study is to analyze how far the interopability between the branches of the land arm in the protracted war scheme in Indonesia is. The research was carried out at the Army Headquarters and the Army Education and Training Command. The research data were analyzed in four steps, namely data reduction, presenting data, integrating data and drawing conclusions. The results of the study indicate that it requires strengthening of interopability between dimensions in the protracted war scheme in Indonesia. The conclusion is that in modern warfare, interoperability is absolutely necessary in military operations. Suggestions for the need for further research on interoperability between branches in the Army Forces in a protracted war scheme are more specific in one large island defense area. 
FACTORS AFFECTING THE DEVELOPMENT OF FOREST TOURISM CEMARA BEACH AND ITS IMPACT ON INCOME FARMER HOUSEHOLD Gunawan, Ridwan; Dasipah, Euis; Dahtiar, Agi
Journal of Sustainable Agribusiness Vol. 3 No. 2 (2024)
Publisher : Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31949/jsa.v3i2.11671

Abstract

The objective of this study is to examine the factors that impact the growth of Cemara Beach Forest Tourism and its effect on the earnings of farmer households. The respondents were selected through the census method, with a total of 65 units. The approach employed for analysis was path analysis and paired t test. The study revealed that the attractiveness and tourism environment of Cemara beach forest, which includes Attractions, Amenities, Accessibility, and Auxiliary Services, had a good achievement level of 72.90%. Supporting Institutions for tourism also achieved a good criterion of 65.85%. Additionally, community participation showed good conditions with a good criteria achievement level of 61.92%. The development of Cemara Beach Forest Tourism attained a good criteria achievement level of 77.93%. Tourist Attraction and Environment had a positive correlation r = 0.89, indicating a very close relationship with Supporting Institutions. This suggests that the better the Supporting Institutions are, the better the Tourist Attraction and Environment. Community Participation demonstrated an indication of a very close relationship with Tourist Attraction and Environment. This implies that community participation increases with better tourist attractions and the environment. Supporting Institutions had a positive correlation r = 0.89 with community participation, indicating a close relationship. This implies that the better the Supporting Institutions, the better the community participation. Tourist Attraction and Environment, Supporting Institutions, and Community Participation had a positive effect on the development of Cemara beach forest tourism, with tourist attraction having the greatest influence at 46.85%, followed by Supporting Institutions at 25.82%, and Community Participation at 23.58%. The development of Cemara coastal forest tourism had a positive impact on the income of farmer households, increasing it by an average of 67.16%.
The Influence of Communication Competence, Emotional Intelligence, and Organizational Culture on Employee Performance at the Indonesian Land Transportation Polytechnic (PTDI-STTD) Gunawan, Ridwan; Susilastuti, Darwati; Rojali, Muhammad
Jurnal Greenation Sosial dan Politik Vol. 3 No. 2 (2025): Jurnal Greenation Sosial dan Politik (Mei - Juli 2025)
Publisher : Greenation Publisher & Yayasan Global Resarch National

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/jgsp.v3i2.378

Abstract

This study aims to analyze the influence of communication, emotional intelligence, and organizational culture on employee performance at the Indonesian Land Transportation Polytechnic-STTD (PTDI-STTD). In the era of digital transformation and globalization, employee performance becomes a fundamental factor determining organizational success in achieving strategic goals. The research employed a quantitative descriptive design with an explanatory approach involving 105 civil servant employees as respondents selected through stratified random sampling technique. Data collection was conducted using closed questionnaires with a 1-5 Likert scale, then analyzed using SPSS with multiple linear regression techniques. The results showed that simultaneously, communication, emotional intelligence, and organizational culture significantly influence employee performance (F calculated 40.344 > F table 2.69, sig. 0.001 < 0.05). Partially, all three variables also proved to have significant effects with organizational culture showing the most dominant influence (? = 0.478), followed by emotional intelligence (? = 0.201), and communication (? = 0.134). The coefficient of determination of 0.822 indicates that 82.2% of employee performance variation can be explained by these three variables. These findings confirm the importance of an integrated approach in developing effective communication, emotional intelligence, and positive organizational culture to improve employee performance in higher education transportation institutions.
The relationship between critical thinking and student learning independence in mathematics learning in Elementary School Tilawatila, Wawa; Adinda, Dea; Gunawan, Ridwan
LEOTECH: Journal of Learning Education and Technology Vol. 1 No. 1 (2024): LEOTECH: Journal of Learning Education and Technology
Publisher : CV. Akademi Merdeka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70152/leotech.v1i1.6

Abstract

Critical thinking skills are an important foundation for individuals in the modern era. This ability is not only needed at a high level, but also from an early age, including in elementary schools. Unfortunately, its application in elementary schools is still minimal. Assessing the critical thinking skills of 4th grade students in the material of perimeter and area of a square, analyzing its relationship with learning independence, and knowing the level of student understanding of the material. Quantitative research with descriptive and correlational design. A sample of 7 4th grade students was selected by purposive sampling. Data were collected through questionnaires and questions. Data were analyzed using inferential statistics. Students' critical thinking skills are still low. There is a significant positive relationship between learning independence and critical thinking skills. Students' level of understanding of the perimeter and area of a square still needs to be improved. Critical thinking skills of 4th grade students in the material of the perimeter and area of a square need to be improved. Efforts to improve students' critical thinking skills need to be made by paying attention to the important role of learning independence. In addition, learning the perimeter and area of a square needs to be designed more effectively to improve students' understanding. These findings provide important implications for educators to: (1) Increase the focus on developing students' critical thinking skills in learning; (2) Integrate aspects of learning independence in learning to support the development of students' critical thinking skills; (3) Design more effective and student-centered learning of the perimeter and area of a square. This research is expected to contribute to the development of mathematics learning in elementary schools, especially in improving students' critical thinking skills and learning independence in square perimeter and area material.
Co-Authors Adinda, Dea Agi Dahtiar Darwati Susilastuti Euis Dasipah Feri Yusivar Kadir, Zuhal A. Nakir, M Prayitno, Arief Rojali, Muhammad Tilawatila, Wawa Wahidin Wahab Zuhal Kadir, Zuhal