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All Journal International Journal of Evaluation and Research in Education (IJERE) Jurnal Pendidikan Vokasi Jurnal Pendidikan Teknologi dan Kejuruan Jurnal Teknik Mesin Jurnal Pendidikan Teknik Mesin Journal of Education and Learning (EduLearn) Jurnal Pendidikan Teknik Mesin Teknika Otopro Journal of Educational Science and Technology Media Mesin: Majalah Teknik Mesin INVOTEC Jurnal Dimensi Pendidikan dan Pembelajaran Educatio Dinamika : Jurnal Ilmiah Ilmu Administrasi Negara Jurnal Pemberdayaan: Publikasi Hasil Pengabdian Kepada Masyarakat JIPI (Jurnal Ilmiah Penelitian dan Pembelajaran Informatika) EDUKATIF : JURNAL ILMU PENDIDIKAN Literasi : Jurnal Ilmu Pendidikan Infotekmesin STEAM Engineering : Journal of Science, Technology, Education And Mechanical Engineering Jurnal Educatio FKIP UNMA Otopro Jurnal Ilmiah Manajemen Kesatuan Edunesia : jurnal Ilmiah Pendidikan Indonesian Journal of Engineering and Technology (INAJET) Prima Abdika: Jurnal Pengabdian Masyarakat LEARNING : Jurnal Inovasi Penelitian Pendidikan dan Pembelajaran Automotive Experiences Journal of Mechanical Engineering, Science, and Innovation Jurnal Pendidikan dan Pembelajaran Jurnal Pendidikan Sultan Agung Jurnal Polimesin Jurnal Ilmu Ekonomi, Pendidikan dan Teknik (IDENTIK) Jurnal Rekayasa Mesin Automotive Innovations Journal Abisatya
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Universitas Negeri Surabaya
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The Influence of Critical Thinking Skills and Inquiry Skills on the Biosolar Innovation Ability of Class X Students TKR Skills Competency at SMKN 1 Jiwan Lestari, Yoni Dwi; Harimurti, Rina; Warju, Warju; Anifah, Lilik; Buditjahjanto, I Gusti Putu Asto
Jurnal Dimensi Pendidikan dan Pembelajaran Vol 13: Special Issue No. 1 (2025)
Publisher : Universitas Muhammadiyah Ponorogo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24269/dpp.v13iSI1.11131

Abstract

Critical thinking skills and inquiry skills are necessary for vocational school students to stimulate innovation abilities because vocational school graduates are prepared to immediately enter the world of work or create their jobs. The research goal is to analyze the influence of critical thinking skills and inquiry skills on the biosolar innovation abilities of class Light Vehicle Engineering students. It is a descriptive type of research that applies a quantitative method. It uses an ex-post de facto design. The population in this study was class X TKR  skill competency students at SMK Negeri 1 Jiwan, totaling 129 students. With a sample size of 98 students. This study used a simple random sampling technique. The measuring instrument used is a questionnaire with multiple linear regression analysis as the data analyzing technique. The results show that there is a significant partial and simultaneous influence of the critical thinking skills and inquiry skills variables on the biosolar innovation abilities of the class The suggestion from this research is that schools are expected to be able to adopt policies that can stimulate students' biosolar innovation abilities which are influenced by critical thinking skills and inquiry skills.
Optimizing copper catalytic converter designs for emission reduction in automatic motorcycles using grey relational analysis Sudirman Rizki Ariyanto; Warju Warju; Komarudin Komarudin; Ata Syifa' Nugraha; Susi Tri Umaroh
Jurnal Polimesin Vol 23, No 2 (2025): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i2.6375

Abstract

Vehicle emissions remain a major environmental challenge in urban areas, particularly in developing countries like Indonesia, where motorcycles dominate transportation. Automatic motorcycles pose specific emission control difficulties due to their engine characteristics. This study experimentally evaluates six copper-metallic catalytic converter designs installed on a 150cc automatic motorcycle under idle and 3000 rpm conditions. Exhaust emissions of carbon monoxide (CO) and hydrocarbons (HC) were measured using a gas analyzer. Grey Relational Analysis (GRA) was employed to optimize the design parameters. The E3 design (curvature height: 4 mm, diameter: 54 mm, length: 100 mm) exhibited the best performance, reducing CO to 3.72% and HC to 539 ppm. Compared to standard designs, E3 improved emission reduction by 18–36%. These findings confirm that catalyst geometry significantly influences emission control and demonstrate the effectiveness of GRA in multi-parameter optimization. The results contribute to the development of efficient, affordable catalytic converters, supporting sustainable transportation and aligning with SDG 13 goals for climate action.
Exhaust Emission Control in Sport Motorcycles: A Comparison of Catalytic Converters with Alternative Metal Materials Warju, Warju; Ariyanto, Sudirman Rizki; Pratama, Muhammad Yandi
Jurnal Polimesin Vol 22, No 1 (2024): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i1.4092

Abstract

In this modern era, motor vehicles have brought significant changes in human life. Faster and more efficient mobility has increased connectivity between regions, supported economic growth, and improved quality of life. However, increased mobility also means an increase in vehicle exhaust emissions, which contribute to climate change and air pollution. One effective technology for controlling exhaust emissions is the use of catalytic converters. Metal catalytic converters, such as copper, brass, and chrome-plated copper, have been researched as more affordable and effective catalyst alternatives. This research aims to analyze the optimal design of exhaust systems with catalytic converters among three types of alternative materials (copper, brass, and chrome-plated copper) as well as standard exhaust systems without catalysts (STD NC) and standard platinum group metal exhaust systems (STD PGM) in maximizing the reduction of motor vehicle exhaust emissions. An experimental research design was used by utilizing a 2015 Yamaha Vixion Lightning as the research object. Catalytic converters were prepared with specific specifications to ensure consistency and accuracy in measurements. CO (carbon monoxide), HC (hydrocarbons), CO2 (carbon dioxide), and O2 (oxygen) emissions were analyzed using an Exhaust Gas Analyzer. The research results indicate that the CuCr sample exhibits excellent performance in reducing CO and HC emissions. The CuCr sample has an average CO emission of 4.09% Vol with a standard deviation of 1.46, demonstrating good consistency in CO emissions. Meanwhile, the average HC emissions from the CuCr sample are 320 ppmVol with a standard deviation of 106, indicating good consistency in HC emissions. All samples meet the emission standards set by the government, except for the STD NC sample, which exceeds the CO emission threshold.
The Effects of Responsibility and Empathy on Customer Satisfaction in Teaching Factory Learning Sudrajat, Surya Catur; Buditjahjanto, I Gusti Putu Asto; Warju, Warju
Edunesia : Jurnal Ilmiah Pendidikan Vol. 6 No. 1 (2025)
Publisher : research, training and philanthropy institution Natural Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51276/edu.v6i1.1142

Abstract

Vocational education encourages students to achieve competency in order to make students more prepared when joining the world. In order to achieve this goal, vocational education applies the model of a teaching factory. In factory learning, students are taught to provide direct services and products suitable for sale to general consumers or the public. Fundamental values ​​such as responsibility, empathy, and cooperation in service to society are the keys to this learning. The research aims to determine the simultaneous influence of responsibility and empathy on customer satisfaction in teaching factory learning at UPJ Vehicle Engineering Vocational High School 1 Bendo. The research used a sample of 67 class XII students at Vocational High School 1 Bendo using a Likert scale questionnaire with instrument validity test results using V-Aiken and reliability testing using Cronbach alpha. The research uses multiple linear regression analysis for the independent variables (responsibility and empathy) and the dependent (customer satisfaction) variables. The results of the Anova significance research were 0.000, and the calculated F value was 358.402. Then, the R2 value was 0.964. This shows that responsibility and empathy significantly influence customer satisfaction, with a percentage of 96.4%. Hopefully, this research can become the basis for further policy-making.
The Influence of Critical Thinking Skills and Inquiry Skills on the Biosolar Innovation Ability of Class X Students TKR Skills Competency at SMKN 1 Jiwan Lestari, Yoni Dwi; Harimurti, Rina; Warju, Warju; Anifah, Lilik; Buditjahjanto, I Gusti Putu Asto
JURNAL DIMENSI PENDIDIKAN DAN PEMBELAJARAN Vol 13: Special Issue No. 1 (2025)
Publisher : Universitas Muhammadiyah Ponorogo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24269/dpp.v13iSI1.11131

Abstract

Critical thinking skills and inquiry skills are necessary for vocational school students to stimulate innovation abilities because vocational school graduates are prepared to immediately enter the world of work or create their jobs. The research goal is to analyze the influence of critical thinking skills and inquiry skills on the biosolar innovation abilities of class Light Vehicle Engineering students. It is a descriptive type of research that applies a quantitative method. It uses an ex-post de facto design. The population in this study was class X TKR  skill competency students at SMK Negeri 1 Jiwan, totaling 129 students. With a sample size of 98 students. This study used a simple random sampling technique. The measuring instrument used is a questionnaire with multiple linear regression analysis as the data analyzing technique. The results show that there is a significant partial and simultaneous influence of the critical thinking skills and inquiry skills variables on the biosolar innovation abilities of the class The suggestion from this research is that schools are expected to be able to adopt policies that can stimulate students' biosolar innovation abilities which are influenced by critical thinking skills and inquiry skills.
DIGITAL INNOVATION IN AUTOMOTIVE EDUCATION : IMPROVING COLLABORATION SKILL OF STUDENT USING INTERACTIVE FLIPBOOK Kunesa, Faisal Anas; Warju, Warju; Wailanduw, A. Grummy; Nur, Hamid Ramadhan
LEARNING : Jurnal Inovasi Penelitian Pendidikan dan Pembelajaran Vol. 6 No. 2 (2026)
Publisher : Pusat Pengembangan Pendidikan dan Penelitian Indonesia (P4I)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51878/learning.v6i2.9194

Abstract

  Students in the twenty-first century need to be able to work together effectively and be actively involved in their own education. Creating interactive learning material based on flipbooks is one way to bolster these abilities. The purpose of this research is to investigate how students' collaborative abilities are impacted by the use of flipbook media and to document their reactions to the created materials. The researchers in this study used a quasi experimental (group posstest design), which meant that only one set of students received the instructional materials (flipbooks) and the associated activities. An observation sheet for teamwork abilities and a questionnaire for student feedback made up the study tools. After using flipbook media, students cooperation abilities significantly improved, as shown by a significance value of 0.000 < 0.05 in the comparative test on collaboration skills. In addition, the reliability test yielded a Cronbach's Alpha score of 0.846, reflecting strong reliability, and the validity test showed that all ten questionnaire questions had correlation coefficients higher than 0.361, proving that all items were valid. Evident from these results, the flipbook medium was well-received by the student. Thus, the created flipbook-based learning material is well-received and useful for improving students teamwork abilities and receives positive responses, making it suitable for use as an interactive learning medium in twenty-first century learning.   ABSTRAK Siswa di abad ke-21 perlu mampu bekerja sama secara efektif dan terlibat aktif dalam pendidikan mereka sendiri. Membuat materi pembelajaran interaktif berbasis flipbook adalah salah satu cara untuk meningkatkan kemampuan ini. Tujuan penelitian ini adalah untuk menyelidiki bagaimana kemampuan kolaborasi siswa dipengaruhi oleh penggunaan media flipbook dan untuk mendokumentasikan reaksi mereka terhadap materi yang dibuat. Para peneliti dalam studi ini menggunakan desain kuasi eksperimental (desain posttest kelompok), yang berarti hanya satu kelompok siswa yang menerima materi pembelajaran (flipbook) dan aktivitas terkait. Lembar observasi untuk kemampuan kerja tim dan kuesioner untuk umpan balik siswa merupakan alat penelitian. Setelah menggunakan media flipbook, kemampuan kerja sama siswa meningkat secara signifikan, seperti yang ditunjukkan oleh nilai signifikansi 0,000 < 0,05 dalam uji komparatif pada keterampilan kolaborasi. Selain itu, uji reliabilitas menghasilkan skor Alpha Cronbach sebesar 0,846, yang mencerminkan reliabilitas yang kuat, dan uji validitas menunjukkan bahwa semua sepuluh pertanyaan kuesioner memiliki koefisien korelasi lebih tinggi dari 0,361, membuktikan bahwa semua item valid. Terbukti dari hasil ini, media flipbook diterima dengan baik oleh siswa. Dengan demikian, materi pembelajaran berbasis flipbook yang dibuat diterima dengan baik dan bermanfaat untuk meningkatkan kemampuan kerja tim siswa serta mendapat respons positif, sehingga cocok digunakan sebagai media pembelajaran interaktif dalam pembelajaran abad ke-21.
Keterampilan Transversal dalam Pendidikan: Tinjauan Sistematis Berpanduan PRISMA tentang Tren, Tema, dan Kesenjangan Riset Haryanto Haryanto; Warju; Soeryanto; Achmad Imam Agung; Puput Wanarti Rusimamto
Jurnal Educatio FKIP UNMA Vol. 12 No. 1 (2026)
Publisher : Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31949/educatio.v12i1.17898

Abstract

Transversal skills are increasingly regarded as core competencies in education because they support learners’ critical thinking, collaboration, communication, creativity, problem-solving, and adaptability. However, the dispersion of research on transversal skills across various terms, contexts, and approaches necessitates a more focused synthesis. This study aims to analyse publication trends, major themes, educational contexts, research approaches, and gaps in studies on transversal skills. The study employed a systematic literature review, with reporting guided by PRISMA 2020. The search was conducted in Scopus and was limited to English-language, open-access journal articles published between 2021 and 2026. Out of the 117 records found, 16 articles met the requirements for inclusion. The review findings show that there were more publications between 2021 and 2025. The most common topics were conceptual refinement, perception-based measurement, active and collaborative pedagogy, open schooling, and the use of technology, STEM, the arts, and AI. The synthesis also shows that transversal skills are more frequently developed through authentic, collaborative, and project-based learning, although the field is still characterised by the dominance of cross-sectional designs, self-report measures, and limited use of authentic assessment. This review emphasises the need to strengthen operational definitions, expand the vocational high school/TVET context, and develop longitudinal evidence to enhance the relevance and sustainability of transversal skills development in education.
Optimization of Metallic Catalytic Converters to Reduce CO Emissions and Increase Engine Power Warju Warju; Sudirman Rizki Ariyanto; Muhammad Yandi Pratama; Kusuma Refa Haratama
Automotive Experiences Vol. 7 No. 2 (2024)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.11587

Abstract

Metallic catalytic converter (MCC) is one of the technologies widely applied to motorcycle exhausts which aims to improve exhaust emission to be more environmentally friendly. However, even though many studies have been conducted, optimal design has not been achieved compared to other designs. Through this research, the Taguchi method is proposed as an alternative method to find the optimum parameters of MCC. The Taguchi method was chosen because of its ability to find a robust combination of parameters. There are four MCC parameters used as inputs while each parameter consists of three levels, thus the design used is the L18 Orthogonal Array (OA) which each combination is tested on three types of motorcycles, namely Moped, Automatic, and Sports. The signal-to-noise ratio (S/N) was adopted as one of the quality indicators of each combination. The optimization results showed that the best MCC design to reduce CO emissions is STD PGM. However, the optimum CO design can be used as an alternative because the difference in the S/N ratio is only -0.372. Meanwhile, the optimum CO design has another advantage over the STD PGM, namely the S/N value of the power ratio which tends to be higher with a difference of 5.037 compared to the STD PGM. Then, the best MCC design capable of increasing power is the optimum power design. The optimum power design has a superior S/N ratio with a difference of 5.404. In terms of emission, the optimum power design tends to be lower by a difference of -1.875 compared to the STD PGM.
Analisis Perbandingan Konsumsi Bahan Bakar: Pertamax vs Shell Super vs BP 92 pada Motor 4 Langkah Muhammad Syahrul Anwari Anwari; Falah Athirmidzi Athirmidzi; Yoel Andrew Manathan Manathan; Muhammad Tharieq Prayata Prayata; Sudirman Rizki Ariyanto Ariyanto; Warju Warju; Ferly Isnomo Abdi Abdi
Automotive Innovations Journal Vol. 1 No. 1 (2025)
Publisher : Department of Automotive Engineering Technolgy

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

Abstract

Penelitian ini bertujuan untuk menganalisis pengaruh penggunaan tiga jenis bahan bakar, yaitu Pertamax, Shell Super, dan BP 92, terhadap efisiensi konsumsi bahan bakar, performa mesin, dan emisi gas buang pada sepeda motor Yamaha Mio Sporty 2008. Metode penelitian yang digunakan adalah eksperimental dengan mengukur konsumsi bahan bakar (dalam satuan liter/jam) dan waktu habisnya bahan bakar pada rentang putaran mesin 1000-5000 RPM menggunakan fuelmeter, tachometer, dan stopwatch. Pengujian dilakukan secara berulang untuk memastikan keakuratan data. Hasil penelitian menunjukkan bahwa Pertamax memiliki efisiensi tertinggi pada putaran mesin rendah (RPM 1000), dengan waktu konsumsi bahan bakar terlama. Namun, pada RPM menengah dan tinggi (2000-5000), BP 92 menunjukkan pembakaran yang lebih cepat tetapi kurang efisien. Shell Super mencatat konsumsi bahan bakar yang stabil di berbagai tingkat RPM, menunjukkan konsistensi yang baik. Secara keseluruhan, Pertamax direkomendasikan untuk penggunaan sehari-hari pada putaran mesin rendah, Shell Super untuk berbagai kondisi RPM, sedangkan BP 92 kurang optimal untuk penggunaan jangka panjang, terutama pada RPM tinggi. Temuan ini menekankan pentingnya pemilihan bahan bakar sesuai karakteristik mesin dan kebutuhan pengguna, serta perlunya penelitian lanjutan untuk mengoptimalkan komposisi bahan bakar guna meningkatkan efisiensi dan mengurangi dampak lingkungan.
Analisis Efektivitas Kebisingan pada Sepeda Motor Menggunakan Sound Level Meter SNDW SW-524 Ruumy Bahrul Alam Alam; Lutfi Setiawan Firmansyah Firmansyah; Sudirman Rizki Ariyanto Ariyanto; Warju Warju; Ferly Isnomo Abdi Abdi; Yustin Setiya Widoretno Widoretno
Automotive Innovations Journal Vol. 1 No. 1 (2025)
Publisher : Department of Automotive Engineering Technolgy

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

Abstract

Kebisingan yang dihasilkan oleh sepeda motor telah menjadi masalah serius di daerah perkotaan, terutama di Indonesia, di mana sepeda motor merupakan sarana transportasi utama. Penelitian ini bertujuan untuk menganalisis tingkat kebisingan yang dihasilkan oleh tiga jenis sepeda motor (bebek, matic, dan sport) pada berbagai tingkat putaran mesin (RPM) menggunakan Sound Level Meter (SLM). Metode penelitian yang digunakan adalah eksperimental kuantitatif dengan pengukuran kebisingan berdasarkan standar ISO 5130:2019. Hasil penelitian menunjukkan bahwa sepeda motor sport menghasilkan kebisingan tertinggi (rata-rata 95,54 dBA), terutama pada RPM tinggi, sementara sepeda motor bebek menghasilkan kebisingan terendah (rata-rata 77,80 dBA) dengan fluktuasi yang lebih stabil. Temuan ini mengindikasikan perlunya inovasi teknologi peredam kebisingan, terutama untuk sepeda motor sport, guna memenuhi standar kebisingan yang ditetapkan dan mengurangi dampak negatif terhadap lingkungan dan kesehatan masyarakat.
Co-Authors 'Ilmi, Muhammad Iklil Ulil A. Grummy Wailanduw Abdul Hafidz Achmad Imam Agung Achmad Imam Agung ADI TRISNA, RIO Al Fahrurrozi, Mochammad Arya Andri Prasojo Anggara Ardiyanta Anggara Sukma Ardiyanta ANGGRAINI, BAGUS Anita Susanti Antonius Edy Kristiyono Anwari, Muhammad Syahrul Arifianti, Lailatus Sa'diyah Yuniar Ariyanto, Sudirman Rizki Ariyono Setiawan Arya Mahendra Sakti Arya Sakti Asidigisianti Patria Ata Syifa’ Nugraha Bagas Surya Hadi Bayu Agung Pramono Buitjahjanto, I Gusti Putu Asto Dadang Supriyatno Daeng Rahmatullah Deshinta Arrova Dewi Diah Wulandari Diastian Vinaya Wijanarko Diastian Vinaya Wijanarko Dio Alif Airlangga Daulay Djoko Sungkono(2) Dodik Dermawan Donny Ardy Kusuma Drastiawati, Novi Dyah Riandadari Fahrul Ardiansyah FAIQOTIN NISA, IHDAA Faisal Anas Kunesa Fajar Indra Kusuma Falah Athirmidzi Athirmidzi Farzana Syazwanasyah Ilyasa Shafa Ferly Abdi Ferly Isnomo Abdi Ferly Isnomo Abdi Ferly Isnomo Abdi Abdi Firlani, Tony Firman Yasa Utama Ganda, Andita Nataria Fitri Gunarti Dwi Lestari Hamdani, Riza Arif Hamid Ramadhan Nur HANDIWI, RIA Haryanto Haryanto Haryanto Haryanto Hidayatullah, Rachmad Syarifudin I Gusti Putu Asto Buditjahjanto I Made Muliatna I Made Muliatna Ibisono, Gigih Chandra Ihfi Dzuhriyanul Musthofa IHSAN NURKHAKIM Iie Suwondo Irma Rusanti Isnantyo, Fajar Danur Jahjanto, I Gusti Putu Asto Jarot Danang Priambodo Komarudin Komarudin Komarudin Komarudin Kunesa, Faisal Anas Kunjung Ashadi Kusuma Refa Haratama Lailatus Arifianti Lailatus Sa'diyah Yuniar Arifianti Lailatus Sa'diyah Yuniar Arifianti Lestari, Yoni Dwi Lilik Anifah Lilis Sulandari Lutfi Setiawan Firmansyah Firmansyah Luthfiyah Nurlaela Marniati Marniati Martadi . Melinda Astuti Mochamad Purnomo Muhammad Nurtanto Muhammad Pratama Muhammad Syahrul Anwari Muhammad Syahrul Anwari Anwari Muhammad Tharieq Prayata Prayata Muhammad Yandi Pratama Muhammad Yandi Pratama Mutohhari, Farid Novi Sukma Drastiawati Nugraha, Ata Syifa' Nur Kholifah Nur Vidia Laksmi B Nur, Hamid Ramadhan Nuur Wachid Abdul Majid Pratama, Muhammad Yandi Priambodo, Jarot Danang Puguh Prasetyono Puput Wanarti Rusimamto Puput Wanarti Rusimamto Putu Sudira Rabiman, Rabiman Rachmad Syarifudin Hidayatullah Rafli Irmansah Rahmadian, Reza Ratna Suhartini Ria Handiwi Rina Harimurti Rio Adi Trisna ROJIL GHUFRON, MOCHAMMAD Rommy Mochamad Ramdhani RUSY ANADY, NOVY Ruumy Bahrul Alam Alam Soeryanto Soeryanto Soeryanto Soeryanto Soeryanto Soeryanto Soeryanto Soffan Nurhaji Sudirman Rizki Ariyanto Sudirman Rizki Ariyanto Sudirman Rizki Ariyanto Sudirman Rizki Ariyanto Ariyanto Sudirman Rizki Ariyanto Ariyanto Sudirman Rizki Ariyanto Ariyanto Supari Muslim Supari Muslim Suprapto Suprapto Surya Catur Sudrajat, Surya Catur Susi Tri Umaroh Susi Tri Umaroh Susi Tri Umaroh Susi Umaroh Suyitno Suyitno Syamsul Hadi Syunu Trihantoyo TRI UMAROH, SUSI Tri Wardati Khusniyah Trisna, Rio Adi Ulfiyah, Laily Umaroh, Susi Tri Wahyu Cahyadi Wahyu Robby Cahyadi WENI ROSDIANA Widoretno, Yustin Setiya Wijono Wijono Wildan Taufik Raharja Wiyanto, Theodorus Yanuar Rahman Yelma Dianastiti Yoel Andrew Manathan Manathan Yustin Widoretno Zainal Arifin