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All Journal TEKNIK Jurnal Pendidikan dan Pengajaran Jurnal Pendidikan Teknologi dan Kejuruan JTEV (Jurnal Teknik Elektro dan Vokasional Sainstek Journal of Mechanical Engineering Education (Jurnal Pendidikan Teknik Mesin) JOIV : International Journal on Informatics Visualization INVOTEK: Jurnal Inovasi Vokasional dan Teknologi Jurnal Penelitian Pendidikan IPA (JPPIPA) JURNAL PENDIDIKAN TAMBUSAI Jurnal Ilmiah Pendidikan dan Pembelajaran Journal of Educational Research and Evaluation Journal on Education JTP - Jurnal Teknologi Pendidikan Jurnal EDUCATIO: Jurnal Pendidikan Indonesia JRTI (Jurnal Riset Tindakan Indonesia) EDUTEC : Journal of Education And Technology Jurnal Informasi dan Teknologi Journal of Applied Engineering and Technological Science (JAETS) IJECA (International Journal of Education and Curriculum Application) MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat Teknomekanik ARSY : Jurnal Aplikasi Riset kepada Masyarakat JPTE: Jurnal Pendidikan Teknik Elektro MSI Transaction on Education Jurnal Sosial dan Teknologi AEEJ : Journal of Automotive Engineering and Vocational Education Automotive Experiences Jurnal Vokasi Mekanika MASALIQ: Jurnal Pendidikan dan Sains Innovative: Journal Of Social Science Research Journal of Engineering Researcher and Lecturer Ranah Research : Journal of Multidisciplinary Research and Development JTPVI: Jurnal Teknologi dan Pendidikan Vokasi Indonesia Asian Journal of Science, Technology, Engineering, and Art IJIMCE : International Journal of Innovation in Mechanical Construction and Energy The Indonesian Journal of Computer Science IJIS Edu : Indonesian Journal of Integrated Science Education

Remon Lapisa

Universitas Negeri Padang

Author-ID : 304783

Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Social Sciences Transportation Other

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DESAIN DAN KAJIAN SIMULATIF HEAT EXCHANGER BERPROFIL â€˜SPIRAL TUBE IN PIPEâ€™ SEBAGAI PEMINDAH PANAS ANTARA ETHANOL DAN AIR Lapisa, Remon; Fernandez, Donny; Putra, Dwi Sudarno
Sainstek Vol 12, No 1 (2009): Vol. XII No. 1, September 2009
Publisher : Lembaga Penelitian Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (279.164 KB)

The energy crisis has stimulated scientists to begin developing the concept of zero energy building through residual energy conservation and turn it into something useful, One of them is the use of ethanol in PEM fuel cells are obtained through distillation. To change the temperature Ethanol and can be destilled, will be designed heat exchanger that has a function : raising the temperature of ethanol in order to evaporates with intermediate high temperature water, and then lowering the temperature back pure ethanol with low-temperature water heat convection. â€˜Spiral Tube In Pipeâ€™heat exchanger is designed to transfer heat that brought by ethanol with the temperatureÂ 80 CÂ to the cooling water in a spiral tube wrapped with a pipe. Hopefully, through this method can achieve maximum heat transfer value, with low cost on ethanol output temperature 35 C. The basic principles in the development of this heat exchanger are the achievement of maximum heat transfer, Simple in design Â and economic value.Tube material made of copper wich has good conduction coefficient. Water pipes made â€‹â€‹of PVC plastic gutter is easily available and cheap. Minimum pipe size is designed to be more flexible, easily placed anywhere and is simple to maintain. In this paper also included a CFD simulation to determine the flow characteristics that occur along the copper tube. Mathematical equations of physical phenomena was resolved through a linear regression methods. Keywords: heat transfer, Spiral tubeÂ , efficiency, CFD simulation

Developing Energy Conversion Teaching Material Based on Discovery Learning Model Through Scientific Approach Supriadi, Supriadi; Suparno, Suparno; Maksum, Hasan; Lapisa, Remon
Jurnal Pendidikan dan Pengajaran Vol 53, No 2 (2020): JULY 2020
Publisher : Universitas Pendidikan Ganesha

Energy conversion material is material that requires a more detailed and broad understanding and explanation of the material. To be able to improve students' understanding, a discovery learning model teaching material is needed through a scientific approach oriented to problems related to real life. The purpose of this study is to produce teaching materials that are valid, practical and effective in the field. This type of research is research and developmentÂ with a 4-D (four-D) development model. The subjects of this study were students of class X Automotive Light Vehicle Engineering Vocational High School 1 Padang. The instruments used were validation sheets, teacher and student response questionnaires, and learning achievement tests.The results obtained from this development research are as follows: (1) Generating teaching materials for discovery learning models through a scientific approach. (2) The results of the analysis of the validity of teaching materials to experts obtained an average of 0.910> 0.667 with a valid category, (3) The results of the practicality analysis of teaching materials from the teacher's response were 87.33% with a very practical category and students' responses were 91.26% with a very practical category (4) The results of the analysis of the effectiveness of teaching materials are assessed from the results of the pretest and posttest, the gained score is 0.59 in the medium category. The study provides evidence that discovery learning model teaching material through scientific approach is valid, practical and effective to use.

EVALUASI PELAKSANAAN PROGRAM PRAKTEK KERJA INDUSTRI PADA KOMPETENSI KEAHLIAN NAUTIKA KAPAL NIAGA Evenda, Devi; Lapisa, Remon
Jurnal Imiah Pendidikan dan Pembelajaran Vol 4, No 1 (2020): Maret 2020
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jipp.v4i1.24172

Problems in the implementation of apprenticeship students in the Nautika Kapal Niaga expertise in SMKN 2 Painan students include the difficulty of adjusting the apprenticeship schedule to the shipping industry, the lack of competence with student work opportunities has an impact on the low ability of students after implementing internship. Research methods are quantitative research methods and qualitative research methods whose use is adjusted to the desired data needs to answer research questions. Research respondents are each party involved in carrying out internship and 40 students. The instrument for qualitative research uses interview guidelines and specific observation guidelines for prakerin preparation data, while quantitative research data uses questionnaire instruments, learning outcomes tests and rubric of practical learning outcomes assessment. The results showed that 1) Formative evaluation related to the assessment of the implementation process of the apprenticeship in preparation of the apprenticeship had good results, the assessment of the implementation of teacher assignments (77%) was in the medium category and the industry supervisor (63%) was in the poor category, students' perceptions on the application of the teacher's tasks 69 % and industry advisers 66%, meaning that improvements still need to be done because they have moderate (sufficient) value. The results of the study on the assessment of the scope of work carried out by apprenticeship activities carried out by students 82% with good categories at stage I, 83% with good categories at stage II, 80% with good categories at stage III, 67% categorized as being at stage IV and 62% categorized poor in stage V, the overall average score is at an average of 74% in the medium category, 2) summative evaluation related to the assessment of the results of the perceived apprenticeship in the realm of attitude the overall average score in the learning outcomes of the realm of attitude is 72% in the medium category, the realm psychomotor practice 1 with an average of 80 and practice II with an average of 83, the value of good category and students declared competent in practice, in the cognitive realm obtained an average of 71.20 this score is still below the KKM in the cognitive domain that is 75, cognitive learning outcomes indicate that students' cognitive abilities still need to be improved.Keywords: Internship, Formative Evaluation, Summativ Evaluation

Kontrol Ventilasi Mekanis Berbasis pada Jumlah Estimasi Penghuni menggunakan Sensor Karbon Dioksida Rahman, Haolia; Sukandi, Agus; Nasruddin, Nasruddin; Arnas, Arnas; Lapisa, Remon
TEKNIK Vol 41, No. 3 (2020): December 2020
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v41i3.33416

Ventilasi merupakan unsur penting untuk menjaga kualitas udara yang baik di dalam sebuah bangunan. Namun, penggunaan ventilasi yang berlebihan menyebabkan tingginya konsumsi energi dari sistem HVAC. Standar ASHRAE telah memberikan aturan bahwa laju ventilasi tergantung dari banyaknya penghuni dan luas ruangan di dalamnya. Oleh karena itu kuantifikasi populasi penghuni perlu diketahui sebagai acuan sebuah kontrol ventilasi. Pada penelitian ini, jumlah penghuni diestimasi menggunakan metode Bayesian MCMC berdasarkan level CO2 di dalam ruangan. Persamaan kesetimbangan massa CO2 digunakan sebagai model perhitungan Bayesian MCMC. Pengujian metode Bayesian dalam mengestimasi jumlah penghuni diaplikasikan pada sebuah ruangan kantor skala kecil berukuran 96,7 m3 yang dilengkapi dengan sistem ventilasi, sehingga estimasi penghuni dan kontrol ventilasi dapat dilakukan secara bersamaan. Pengujian juga mencakup kontrol ventilasi konvesional menggunakan level CO2 secara langsung tanpa mengkonversinya menjadi jumlah penghuni. Laju ventilasi berdasarkan jumlah penghuni pada ruangan pengujian mengacu pada standar ASHRAE 62.1. Hasil pengujian menunjukan bahwa kontrol ventilasi berbasis pada estimasi jumlah penghuni menggunakan metode Bayesian berhasil dilaksanakan dengan nilai laju ventilasi per penghuni lebih mendekati standar ASHRAE 62.1 dibandingkan dengan ventilasi metode konvensional.

Hubungan Persepsi Siswa Dalam Metode Mengajar Guru Terhadap Hasil Belajar Siswa Teknik Kendaraarn Ringan di SMK N 8 Padang Putra, Ilma; Martias, Martias; Lapisa, Remon
MSI Transaction on Education Vol 1 No 4 (2020): MSI Transaction on Education
Publisher : Minangkabau Scholar Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46574/mted.v1i4.27

Penelitian ini membahas tentang hubungan persepsi siswa dalam metode mengajar guru terhadap hasil belajar siswa yang di latar belakangi pada masalah masih kurangnya perhataian, tanggapan dan respon siswa terhadap materi yang disampaikan oleh guru dalam proses pembelajaran di kelas. Jenis penelitian ini adalah penelitian kuantitatif bersifat korelasional. Populasi dalam penelitian ini yaitu siswa kelas XI Program Keahlian Teknik Kendaraan Ringan SMK 8 Padang yang berjumlah 45 siswa. Jenis analisis data yang digunakan teknik adalah teknik analisis korelasi Product Moment. Hasil dari analisis di peroleh (1) koefisien korelasi r hitung (0,957) > r tabel (0,355) serta t hitung (17,769) > t tabel (1,699) pada taraf signifikansi 5%, (2) koefisien korelasi r hitung (0,964) > r tabel ( 0,355) serta t hitung (19,522) > t tabel (1,699) pada taraf signifikansi 5%. Berdasarkan hasil penelitian, disimpulkan bahwa persepsi siswa dalam metode mengajar guru memiliki hubungan positif dan signifikan terhadap hasil belajar.

Curriculum Evaluation of Light Vehicle Engineering Department with Discrepancy Model as Per Industry Needs Aprianto, Anggi; Rizal, Fahmi; Lapisa, Remon; ., Ambiyar; Wakhid, Wakhinuddin; ., Sukardi; Riyanda, Afif Rahman
Journal of Education Research and Evaluation Vol 4, No 4 (2020)
Publisher : LPPM Undiksha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jere.v4i4.28978

The implementation of the curriculum as per industrial needs should be improved in terms of qualifications of teachers, tools, practicum materials, and the use of learning models as per industry needs. This study aims to evaluate the used curriculum of light vehicle engineering department as per industry needs. This study uses discrepancy evaluation model (design, installation, process, product and comparison) that describes the implementation of curriculum according to the industry needs from various aspects, namely: design, installation, process, product and comparison. The study results concluded that achievement level of curriculum implementation as needed in the design component obtained an average score of 4.28 (83.17%) classed in a good category; installation components get an average score of 3,502 (78.47%) classified in sufficient categories; process components get an average score of 4.05 (81.75%) classed in a good category; and product components that scored an average of 4.02 (81.26%) classified in a good category. As well as in the comparison component that obtained an average score of 3,324 (74.27%) classified in sufficient categories. The implementation of vocational school curriculum majoring in light vehicle engineering as a whole is categorized as sufficient. Therefore, it needs a follow-up from the relevant parties for a better implementation.; one of which is by revising the curriculum to fit the needs of the industry.

Learning Media Development for Continuously Variable Transmission Automatic Transmission System Subjects on Motorcycles Lapisa, Remon; Azhari, Nevil
IJECA (International Journal of Education and Curriculum Application) Vol 4, No 2 (2021): August
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/ijeca.v4i2.5329

Teaching aids that have similarities to tools are actually very helpful in learning. In improving students' understanding, learning media is needed, namely a simulator. This study aims to design a Continuously Variable Transmission (CVT) simulator with validity, practicality and effectiveness, useful to be used as a medium of learning in schools in the subject of automatic transmission systems. The type of research used is Research and Development (R&D) with 4-D model development procedures. This research consists of four stages, namely: Define, Design, Develop, and Disseminate. The subjects used were students of SMKN 1 Koto Baru Dharmasraya, the technical analysis of the data used was technical analysis from experts by looking at the validity, practicality and effectiveness of the simulator. To see the difference between the average score of learning scores before and after using a simulator with Gain Score and Standard Deviation. The results showed that the simulator met the principle of relevance from expert judgment with a level of 0.81 which was declared a valid category, on practicality based on the teacher's response it was declared practical with a value of 87.33% and student responses with a value of 92.42%. The effectiveness of the tool is declared effective. On the results of the pretest with an average score of 56.00%, the results of the posttest with an average score of 73.00%, on the N-gain the overall average of students is 0.37 and on the standard deviation seen from the N-gain of 0.12. Based on the development of this media, it can be concluded that the simulator is valid, practical and effective in learning at school

Rancang Bangun Simulator Sistem Starter Sepeda Motor Dalam Mengatasi Keterbatasan Media Pembelajaran Irma Yulia Basri; Delsina Faiza; Remon Lapisa; M. Natsir; Hasan Maksum; Giatman Giatman
Jurnal Pendidikan Teknik Elektro Vol 2 No 1 (2021): Jurnal Pendidikan Teknik Elektro
Publisher : Jurusan Teknik Elektro Fakultas Teknik Universitas Negeri Padang

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

The condition of COVID-19 has changed the living order of all units. The government and the entire community concentrate on the importance of public safety, with the consequence that funds from different units are allocated to COVID-19 disaster management, including the allocation of educational funds. Procurement for SMK education facilities and infrastructure, previously restricted by training facilities, such as a motorcycle auto-study program (TOSM) of SMKN 1 XI Koto Tarusan-Pesisir Selatan, has been affected by changes in funding from the Ministry of Education and Culture. The absence of learning media and the small number of active teachers from TOSM means that the capacity of TOSM students to fulfill the minimum industry requirements, which is shown by only 16% of SMKN 1 XI Koto Tarusan graduates who can be accepted immediately into the world of work. In a workshop on the design of a motorcycle starter device simulator to solve the problem of incomplete learning media, the implementation team helped develop learning media. This activity took place at SMKN 1 XI Koto Tarusan Pesisir Selatan from 25 to 28 September 2020. There were 10 teachers involved in the course. The production for this operation is 2 motorcycle starter system simulators, which can be used in the teaching and learning process as learning media.

PENINGKATAN KOMPETENSI SISWA MELALUI PELATIHAN AUTO CAD Remon Lapisa; Irma Yulia Basri; Ahmad Arif; Hendra Dani Saputra
invotek Vol 17 No 2 (2017): INVOTEK: Jurnal Inovasi, Vokasional, dan Teknologi
Publisher : Universitas Negeri Padang

Siswa-siswa SMK membutuhkan beberapa keahlian yang nantinya akan digunakan ketika siswa menyeleseikan studinya di sekolah. Salah keahlian yang diharapkan adalah kemampuan menggambar menggunakan program Auto Cad. Dimana kemampuan akhir yang diharapkan dari siswa nantinya adalah mampu membuat gambar dalam bentuk model 2-D dan 3-D. Tujuan dari program pelatihan adalah untuk mengembangkan dan meningkatkan kemampuan dari siswa kelas XII dalam menggunakan program Auto Cad. Dengan program pelatihan ini diharapkan siswa mampu membuat gambar komponen-komponen mesin dalam bentuk format 2-D dan 3-D. Sehingga siswa kelas XII SMK memiliki kemampuan menggambar komponen-komponen mesin dan gambar-gambar lainnya dalam format 2-D dan 3-D. Program pelatihan ini menggunakan metode melaui pemberian modul Auto Cad, diskusi, menayangkan melalui slide cara pembuatan gambar mesin dalam format 2-D dan 3-D serta mempraktekkan cara membuat gambar 2-D dan 3-D. Sehingga diharapkan terjadi peningkatan kemampuan siswa kelas XII dalam menggambar komponen-komponen mesin dan gambar-gambar lainnya dalam format 2-D dan 3-D.

Pengaruh Inersia Termal Tanah Terhadap Kenyamanan Ruangan Remon Lapisa; Krismadinata Krismadinata; Arwizet Arwizet; Martias Martias; Ahmad Arif; M.Y. Setiawan
invotek Vol 18 No 1 (2018): INVOTEK: Jurnal Inovasi, Vokasional, dan Teknologi
Publisher : Universitas Negeri Padang

Sebuah desain bangunan yang baik harus memperhatikan karakteristik geografis, kondisi lingkungan dan iklim setempat dimana bangunan didirikan. Salah satu faktor penting yang dapat mempengaruhi kenyamanan termal bangunan adalah pengaruh inersia termal tanah dan material selubung bangunan. Tujuan penelitian ini adalah untuk menganalisa pengaruh inersia termal tanah terhadap perubahan temperatur dan kenyamanan penghuni didalam ruangan. Pada bagian pertama, karakteristik bangunan dan pemodelan numerik akan dijelaskan yang dilengkapi dengan data iklim lokasi dimana studi kasus dilakukan. Perpindahan panas yang terjadi dari bangunan menuju tanah dan sebaliknya digambarkan secara detil pada bagian selanjutnya dengan menggunakan pendekatan model perpindahan panas tiga dimensi. Hasil simulasi numerik menggunakan TRNSYS (R) menunjukan bahwa inersia termal tanah berpengaruh secara signifikan terhadap suhu dan kenyamanan ruangan. Tanah dengan konduktivitas dan kapasistas termal yang baik mampu menurunkan tingkat ketidaknyamanan ruangan hingga 21.9%.

Co-Authors - Primawati A G Halim A, Esa Hafizul Abbas, Muhammad Rabiu Abdul Aziz Abdullah, Adlan Azmi Abdullah, MT, Dr. Rijal Ade Afriadi AR Afif Rahman Riyanda Agus Sukandi Ahmad Arif Ahmad Arif Aldio, Muhammad Fikhri Alex Firstson Kurniawan Alfarizi, Aldi Ambiyar, Ambiyar Ananda, Opi Andre Kurniawan Andre Kurniawan Andre Kurniawan Andri Septiandes Anugrah, Pinto Aprianto, Anggi Aprizal Saputra Arafat, Andril Arfianti, Fina Armaliany, Telvi Arnas Arnas, Arnas Arwizet Arwizet, Arwizet Arwizet K, Arwizet Asnil Asnil Asnil Asnil Asnil Asnil Azhari, Nevil Bahrul Amin Bambang Sudarmanta Beni Giovani Berliansyah, Aqilvin Budi Syahri Bulkia Rahim Candra, Oriza Delima Yanti Sari Delsina Faiza Denda Afri Juliadi Devega, Army Trilidia Dimas Riadi Dirgantara, Septa Zela Donny Fernandez Dori Yuvenda Dwi Sudarno Putra Dwiprima Elvanny Myori, Dwiprima Elvanny Eko Indrawan Endri Rizki Anugrah Endrika Wahidri Enjang Suhaedin Erzeddin Alwi Evenda, Devi Fadhilla Azherda Fahmi Rizal Fahrendra, Aqsal Fajar Riyaddi fajar fajar, Fajar Riyaddi Faris Afif Fauza, Anna Niska Fauzun, Hudri Febri Prasetya Febri Silvia Firdaus Firdaus Firmansyah, Gusri Fivia Eliza Ganefri . Gusni Sushanti H H, Tiara Klaudia Habibie Habibie Halmadid, Muhammad Habib Hamizum, Bestra Hansi Effendi Hariyadi, Hariyadi Harmanto, Dani Hasan Maksum Hasanuddin WS Hendra Dani Saputra Hendra, Novia Hendri Nurdin Herasmus, Hilda Huda, Yasdinul Ilham Zikri Indah Rahmatika Sari Indah Indah, Indah Rahmatika Sari Iqrha, Muhammad Irma Husnaini Irma Yulia Basri Irzal Irzal Irzal, Irzal Jamaludin Jamaludin Jasman Jasman Juli Sardi Junil Adri Krismadinata Krismadinata Krismadinata Krismadinata Krismadinata Krismadinata, Krismadinata Kurnia Wahyu Prima Kurniawan, Alex Firstson kusuma, Yuda Perdana Larisang M. Afdal M. Natsir M. Yasep Setiawan M.Y. Setiawan Martias Martias Milana Milana Muhamad Fadel Pratama Muhammad Azim Muhammad Djoni Bustan Muhammad Elfin Muhammad Lathif Mahendra Muhammad Rizki Anshari Muhammad, Maghfiridhani Muji Setiyo Mulianti Mulya, Hasan Sayuti Muslim Muslim Nanang Qosim Nasruddin Nasruddin Nevil Azhari Niko Adima Brawira Nofri Helmi, Nofri Nurdin Hendri Nurmansyah, Ridho Nuzul Hidayat, Nuzul Oki Muraza Prayoga, Ongki Primandari, Sri Riski Putri Primawati Primawati Purwanto, Wawan purwantono purwantono Purwantono Purwantono Purwantono, Purwantono Putra, Ilma Putra, Randi Purnama Putra, Rido Putra, Rusnardi Rahmat Putri, Nengka Putri, Prima Yane Rahadian Zainul Rahman, Haolia Rahmat Afdhol Rahmiati Rama, Alzet Refdinal Refdinal Refdinal, Refdinal Refdinal, Refdinal Retno Wahyudi Rifdarmon Rifelino Rifelino Rizki Vananda Rizky Ema Wulansari Robby Mulya SABRINA, ELSA Sabtu, Sabtu Saputra, Firman Omni Silvia, Febri Simon, Ryan Ananda Sinukaban, Veronica Yulisna Sisrayanti Soretire Lanrewaju Kamorudeen Sri Haryati Sri Rizki Putri Primandari Sukardi, Sukardi Sundhy Pareza Suparno Suparno Suparno Suparno Supriadi Supriadi Supriadi Supriadi Syafrianto Syafrianto Syahril Syahril Syaifullah, Lasyatta Tambunan, Gerry Lyman Tarig Elshaarani Tiara Klaudia H H Toto Sugiarto Totoh Andayono Unung Verawardina, Unung Wakhid, Wakhinuddin Wakhinuddin Wakhinuddin, Wakhinuddin Wanda Afnison Waskita Waskita Waskito Waskito Waskito, Waskito Wike Oriza Wildy, Fadhlan Wirdianto, Eri Wulansari, Rizky Ema Yandra, Muvi Yelfianhar, Ichwan Yolli Fernanda Yudi Star Novsky Yufrizal Yufrizal, Yufrizal Yus Donald Chaniago Zainal Abadi Zulbadri Zulbadri

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