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Journal : Rekayasa Mesin

Pengaruh Kuat Arus dan Waktu Pengelasan pada Proses Las Titik (Spot Welding) Terhadap Kekuatan Tarik dan Mikrostuktur Hasil Las dari Baja Fasa Ganda (Feritte-Martensite) Agustriyana, Lisa; Suryawan, Yudi; Sugiarto, Sugiarto
Jurnal Rekayasa Mesin Vol 2, No 3 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

This research was conducted to investigate the appropiate spot welding variable to get the maximum tensile strength. The highest of tensile strength referred as good quality of weldment.The plate was made from low carbon steel with phase ferrite and martensite. The current of welding used 0.9 kA, 1.6 kA, dan 1.85 kA with welding time were 0.25, 0.5 , 0.75 and 1 second. Mechanical properties testing done involved tensile strength to know shear strength of weld joint. Microstructure test used optical microscope.The results show that spot welding with thecurrent of 1.85kA and welding time of 1 second has the highest tensile strength (about 237.04N/mm2). On the other hand, the lowest tensile strength (150 N/mm2) was produced by combination of 0.9 kA and 0.25 second welding time. It was caused by recrystallization phasedeformation on steel.Keywords: current, welding time, tensile strength, spot weld
Optimasi Parameter Pemotongan Mesin Bubut CNC Terhadap Kekasaran Permukaan dengan Geometri Pahat yang Dilengkapi Chip Breaker Wibolo, Achmad; Wahyudi, Slamet; Sugiarto, Sugiarto
Rekayasa Mesin Vol 2, No 1 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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In machining operation, the quality of surface finish is an important requirement for many turned workpieces. Thus, the choice of optimized cutting parameters is very important for controlling the requied surface quality The focus of present experimental study is to optimize for cutting speed, feed rate, and radius chip breaker using two performance measures, metal removal rate and surface roughness. Response Surface Methodology (RSM). has been applied for developing models in the form of multiple regression equations correlating dependent parameters with cutting parameters and radius chip breaker, in a turning process. The central composite rotatable design was used to plan the experiment, and analysis of variance were employed to study the performance characteristics for three variable independent in turning operation. A second-order model which can describe the relation then to find combination between cutting parameters and radius chip breaker which resulting the maximum metal removal rate and minimum surface roughness. The experimental results reveal that the most significant cutting parameters for surface roughness is cutting speed, followed by feed rate and radius chip breaker. Based on the optimization results, recommended cutting speed, feed rate, and radius chip breaker is 35 m/mt, 0,2819 mm/rev, and 0,85 mm. By implementing this parameters, the surface roughness and metal removal rate is 2,18 μm and 6230,80 mm3/mt.Keywords : Surface Roughness, Metal removal rate, response surface methodology, turning
Karakterisasi Kekuatan Bending dan Hidrofobisitas Komposit Serat Kulit Waru (Hibiscus tiliaceus) Kontinyu Bermatrik Pati Ubi Kayu Rianto, Ari; Soeparman, Sudjito; Sugiarto, Sugiarto
Jurnal Rekayasa Mesin Vol 2, No 2 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

The development of biopolymer becomes alternative solution of the waste problem which is mostly produced by synthetic polymer. Biopolymer cassava extract which has big potency to be developed as synthetic polymer alternative. Nevertheless, the basic characteristic which is hydrofilyc and low tensile strength makes the polymer film produced not acceptable to be used as synthetic polymer alternative. The method used in this research was continous fiber biocomposite by pressed hand lay up. The matrix was Wau wood fiber which had layer variety 1,2,3,4 and the fiber directions 0o and 90o. The matrix biocomposite uses cassava extract with addition variation of gliserol 5%,10%,15% of dry weight. The experiment testing used bending test standart ASTM C 393 (1997) and moisture test standart ASTM D570-81. From this research, it was found that the highest bending result on fiber variation 3 layers and 5 % matrix gliserol was 50,58 Mpa. The highest elongation on 15% gliserol+1 layer was 35%. The lowest moisture test occurred on 1% laye and 5% matrix was 39.3%. Keywords: Biocomposite, bending, biopolymer, Waru wood fiber , gliserol.
Optimalisasi Destilasi Nilam Kering melalui Pembekuan Pra Destilasi Sugiarto, Sugiarto; Sonief, A. As’ad; Sutikno, Djoko; Widhiyanuriyawan, Denny
Rekayasa Mesin Vol 5, No 1 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

The process of extracting oil from the leaves or stems cells by damaging the cell which usually done before or during distillation process. Damaging the cell can be done by mechanical process or freezing process. Chopping the leaves was done to damage the cells through the mechanical process, however the damage have not been able to destroy up to the celular level. While the freezing process could be expected to damage the tissue at the cellular level. Pure research on laboratory scale was used as the experiment method in this study. Freezing temperature pasca-distillation was variated on -13,4 ºC, -19,6 ºC and -24,8 ºC and without freezing process. While distillation process was varied on 95 ºC, 105 ºC dan 115 ºC. In this study, patchouli was distilled on wet and dry condition. LPG was used with automatically combustion control system of for keeping the temperature stability, increasing the capacity and quality of patchouli oil and reducing the production cost and the distillation time to less than 6 hours The stable distillation temperature was able to raise the volume of oil per kilogram of dry weight raw material and decrease the distillation time to less than 5 hours. Patchouli oil volume produced per kilogram of dry raw materials post freeze predistillation increased with increasing the distillation temperature. The low freezing temperature of the pre-distillation produced the high volume of patchouli oil per kilogram of raw material. Pre-distillation on the freezing process of dried patchouli was able to shorten the time of maximum distillation only in 3 hours. The range of distillation temperature on 95 ⁰C, 105 ⁰C and 115 ⁰C produced the different colors of patchouli oil from light brown to dark brown color.Keywords : optimalisation, distillation, dry patchouli, freeze pre-distillation
Perubahan Sifat Mekanis Komposit Hibrid Polyester yang Diperkuat Serat Sabut Kelapa dan Serat Ampas Empulur Sagu Leiwakabessy, Arthur Yanny; Purnowidodo, Anindito; Sugiarto, Sugiarto; Soenoko, Rudy
Jurnal Rekayasa Mesin Vol 4, No 3 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

Filler composite material with natural fibers is ranging widely known in the manufacturing industry. Environmentally friendly material, able to be recycled, as well as able to destroy it self by nature is a technological demands of today. Coco fiber and pith of sago pulp fiber are natural fibers that derived from the processing of waste coconut and sago palms are abundant in the Moluccas and they have not been used optimally. Both of these materials can be used for the manufacture of composite, using polyester resin as the matrix. The research emphasis to get the maximum value of variation of fiber volume fraction and fiber coir pith of sago waste to the value of bending strength and impact strength, according to the desired application. Research methods Lay Hands Up in the manufacture of hybrid fiber composites with a combination of coconut fiber (SSK): sago pith pulp fibers (SES) with a variation of 10% SSK: SES40%, 20% SSK: SES30%, 30% SSK: SES20%, 40% SSK: SES10%. Dependent variable in the study is the bending strength and impact strength. The result is that an increase in bending strength and impact strength with increasing volume fraction, which is higher than the hybrid fiber coir fiber and coconut fiber pith of sago waste. The highest bending strength of the fiber volume fraction of 30%SSK: SES20%, amounting to 97 354 MPa, and the lowest bending force on the fiber volume fraction of 10% SSK: SES40% of 73 701 MPa, while the highest value of impact strength at SSK fiber volume fraction of 40% :SES10%, at 0178 J/mm², and the lowest value of the impact strength on the fiber volume fraction of 10% SSK : SES40% at 0.053 J/mm².Keywords: Mechanical Properties, composites hybrid, polyester, coconut coir fiber, fiber pulp sago pith.
Efek Freezing Damages dan Temperatur Distilasi terhadap Hasil Minyak Atsiri (Nilam) Hamidi, Nurhkolis; Ariyanto, Adhy; Sasongko, Mega Nur; Sugiarto, Sugiarto
Jurnal Rekayasa Mesin Vol 5, No 2 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

Essential oils are a great group of vegetable oils in the form a viscous liquid at room temperature but easily evaporate so as to provide a distinctive scent. Indonesia is the world's largest patchouli oil each year to supply about 75% of the world, but seen from the quality and quantity did not experience much change. This is due to most of the units of the oil still using simple technology / traditional and generally has a limited production capacity. Problems like this need to find a solution with one of the ways that pre-distillation using a freezing effect on the leaf so that the cells will be damaged so that the distillation process will be easier and get the quality of good patchouli oil. Freezing performed on fresh leaves and stems with a temperature variation of 13.8, -19.6 and -24.8 º C, while the temperature of distillation varies the 95, 105 and 115 º C, the clotting time for 2 hours. The results showed the presence of the lower freezing temperature the higher freezing the higher the content of patchouli alcohol (C15H26O), was to the effect of the higher distillation temperature distillation temperatures accelerate the process of spending patchouli oil from the leaves and stems.Keywords: Essential Oil, Predistillation, Temperature, Patchouli Alcohol (C15H26O)
Purifikasi Biogas Sistem Kontinyu Menggunakan Zeolit Sugiarto, Sugiarto; Oerbandono, Tjuk; Widhiyanuriyawan, Denny; Permana Putra, Faruq Syah
Jurnal Rekayasa Mesin Vol 4, No 1 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

The continued development of the technology industry and the rapid depletion of petroleum energy the need for alternative sources of renewable energy to be a very important consideration. Biogas is a renewable energy that has great potential as an alternative energy. The content consists of CH4 biogas as fuel around 50-80% and CO2 as an impurity around 27-45%. With the CO2 gas can affect the purity of CH4 in biogas womb. Therefore, to get the maximum quality of biogas purification necessary. The research was done by making purification equipment (purifier) with zeolite granular solid filler mounted on a biogas digester system continue. Purification processes varying on zeolite layer that fills the purifier is 1, 2, 3, 4, and 5 layer. All walks take a purification process for 60 minutes and observed every 15 minutes. The results showed that the increasing time between biogas purification with zeolite, the CO2 levels tend to decline with the lowest percentage of 21.3% and CH4 levels increase with the highest percentage of 74.7%. This is due to the increasing time of purification, CO2 absorbed in the zeolite structure more and more. So with the absorption of CO2 by the zeolite, the resulting levels of CH4 has increased. In addition to the greater number of zeolite layers become increasingly declining CO2 and CH4 levels increase. This is because the more the number of layers of filler, wide contact area between the biogas by zeolite increasingly large that CO2 is absorbed by the zeolite increased.Keywords: Zeolite, CO2, CH4, purification, biogas continuous system
Dampak Perubahan Temperatur Lingkungan Terhadap Temperatur Puncak Las Dan Laju Pendinginan Sambungan Dissimilar Metal Menggunakan Las Mlg Sugiarto, Sugiarto; Wahyudi, Ari; Masduki, Masduki
Jurnal Rekayasa Mesin Vol 2, No 2 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

The failure of dissimilar weld joint happen to train contructions because of unweld joint quality optimal.This research used MIG welding with CO2 gas shield. The welding current used was 110 Ampere with wire diameter 0.8mm, welding velocity 2 mm/s, gas rate of CO2 was 5L/mnt. Temperature measurement distance towards welding center was 5 mm and 10mm. The joint plate was low carbon steel ST37 and austenitic stainless steel SS 304 with thickness 4mm. In order to obtain the temperature, thermocouple was used complated with ADC and computer to display and graph. Enviroment temperature was variated with room temperature 100 ºC, 200 ºC and 250 ºC. The low peak temperature cause cooling rate post welding deacreased, which was shown trough the decreasing shape of cooling graph. The higher the enviroment temperature, the lower welding peak temperature. It happen to both ST37 and SUS 304. The peak temperature and cooling rate post welding of SUS 304 was lower than ST37. The distribution of peak temperature similar the incrase of enviroment temperature. The most similar and lowest peak distribution of enviroment temperature was obtained 250ºC. Keywords: Thermal cycles, cooling rate, dissimilar metal, MIG welding, enviroment temperature.
Pengaruh Besar Arus Listrik pada Proses Wire Edm Terhadap Profile Error Involute Roda Gigi Lurus Gapsari, Femiana; Sugiarto, Sugiarto; Bagus, Nugroho
Jurnal Rekayasa Mesin Vol 2, No 3 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

Wire Electric Discharge Mechine (EDM) is one of non conventional metal cutter machines. This machine is used to form machine components which has complex form and needs high precision. One of the machinery parameters which influences cutting precision on Wire EDM is the amount of pulse current. The form of involute profile of gear is a form which has complexity and high precision which often changes the form of geometry profile. This studyis aimed at investigating the extent of the influence of the amount of current parameter on Wire EDM towards the profile error involute spur gear. Thi study is experimental design, the independent variable used is pulse current with variation of 3 ampere, 4 ampere, 5 ampere, 6 ampere, and 7 ampere. The dependent variable in this study is profile error involute spur gearwhich later will explain the extent of cutting distortion. The result of this study showed that the higher the electric current, the higher the level of profile error involute spur gear. This means that the level of the precision is getting lower. The level of the lowest profile error involute, which is 0.0907 mm, found at 3 ampere pulse current, while the highest level of profile error involute, which is 0.1256 mm, found at 7 ampere electric current.Keywords: wire edm, pulse current, profile error involute, spur gear.
Ampas Penyulingan Nilam Sebagai Bahan Bakar Alternatif Pada Proses Produksi Minyak Nilam Sugiarto, Sugiarto; Sulistyo, Erwin
Jurnal Rekayasa Mesin Vol 1, No 2 (2010)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

Remaining organic waste product of nilam oil distillation is a potential biomass as a fuel substitute for firewood. Utilization of waste distillation during refining is considered not yet optimal. Whereas by utilizing distillation waste will be obtained by the double advantage is decreasing the cost of production like reduction of the cost of purchasing firewood, waking environment from illegal logging and encroachment uncontrolled firewood and maintaining forest conservation. This research was conducted by varying waste of nilam distillation mixed fuel with firewood with a variation of 0%, 25%, 50%, 75% and 100% waste compared to firewood. Distillation capacity of each process is 60 kg of raw materials that have been chopped dried nilam. Dependent variables are sought in the form of heating value, temperature data in space heating, steam temperature and volume of nilam oil is produced for each variation of fuel weight fraction of waste nilam. The result is a solid fuel heating value increases with increasing weight fraction of waste nilam compared to the firewood. Zones heating temperatures and steam temperature fluctuated or not stable for all variations of fuel weight fraction of waste nilam. Steam temperature below 100 ° C which indicates the water content in the steam is still high. Time required for each distillation process with a capacity of 60 kg is still relatively long time is 5 to 6 hours. Volume nilam oil products tend to increase with increasing weight fraction of fuel from the dregs of nilam. Keywords : Waste distillation of nilam, alternative fuel, nilam oil
Co-Authors (Imam Ghozali), Tukadi A, Belva Elrica Abda Abda Abdilah, Yan Amal Abdul Kohar Mudzakir Abimayu, Liandra Achmad Buchori Achmad Fauzi Achmad Wibolo Adhy Ariyanto Adi Nur Cahyono Adi Prayitno Adi Wiratno, Adi Adi Yusuf Setiawan, Adi Yusuf Adib, Muhammad ADINOTO NURSIANA, ADINOTO Afikirtiani, Winda Afrianti, Astin Eka Afrida, Anisa Nur Agung Pramana Warih Agung Priyo Utomo Agus Budiarto Agus Riyanto Agus Sunarto Agus Suroso Agus Yudianto Agustina, Serly Agustriyani, Feri Agustus Sani Nugroho & Ema Rahmawati Heryaman, Agustus Sani Nugroho & Ahda, Zahrah Zakiya Ahlan, Muhammad Ahmad Nadhif, Ahmad Ahmad Zainudin Ahsan Ahsan Aini, Jumrotin Nur Aji, Abdul Al Farisi, Muhammad Farhan Al Jabar, M Irsyad Alamsyah - Aldi Bastiatul Fawait Fawait Alfa, Aniysah Fauziyyah Alfayit, Dodi Aditian Alhamda, Denisa Septalian AMELIA FEBRIANA, AMELIA Amin Kiswantoro Amrullah, Azhar Hasyim Amrulloh, Nasir Anak Agung Gede Sugianthara andina, Andina Angellia, Tiara Febri Anggara Wiyono Wit Saputra, Anggara Wiyono Wit Angggraini, Renni Anggraini Puspita Sari Anggraini, Deshi Anggraini, Fera Dhian Anies Setiowati, Anies Anindita, Rahma Anindito Purnowidodo Annisa Rahmania Anton Wachidin Widjaja Apriliyani, Wina Dwi Apriyana Irjayanti Arbain Arbain, Arbain Ardian, Fahmi Ardiansah, Mochamad Ardien Ardinata, Ardinata Ardini, Rizkika Ardiyanti, Muthia Are, Robert La Ari Probandari Ari Rianto Ari Wahjudi ARI WAHYUDI Arief Yanto Rukmana Arif Gunawan Arif Hoetoro Arif, Hutoro Arifin, Merlina Lidiana Arinto Hadi, Arinto ARIS ARIS, ARIS Aris Subagiyo Ariyati, Ika Arthur Yanny Leiwakabessy Aryananda, Rangga Laksana As'ari Latif Ascaryan Rafinda Asep Syaiful Bahri, Asep Syaiful Asril Adjis Atiek Iriany Atiek Sri Purwati Atmaja, Adit Sri Atmoko, Warigit Dri Audah, Mesfi El Audrey, Reinaldo Evan Auliya, Muhammad Dani Aviria Ermamilia Awaliyah, Sifa Nur Ayuniza, Salsabila AZ, Rasyidah Azan, Said Amir Azhar, Daris azzarqa, azzarqa B. Sundu Bambang Agus Pramuka Bambang Purwanto Banun Rohimah, Banun Basri Bado, Basri Bastamansyah, Bastamansyah Bayu Rahayudi Berliana, Novi Bernard Hasibuan Bhekti, Lintang Cahya Bramaseto Rosie Pamungkas, Bramaseto Rosie Budhijono, Fongnawati Budi Santosa Budi Santosa Budianto, Roni Budiyanti Wiboworini Budiyanto, Ricky Teguh Carnegi, Dale Cholia, Edison Christina Tri Setyorini Christopher, Liam Colia, Edison Sembiring Cut Dwi Refika, Cut Dwi D, Widhiyanuriyawan Damayanti, Ditha Dana, Tarisa Darmadi, Djarot Bangun Darnain, Abdi Darwiwing, Muh. Darwiwing David, Realino Dedi Ruswandi Deni Mahdiana Denny Widhiyanuriyawan Desi Nurfita Dewi Marfu’ah Kurniawati Dewi, Deshinta Arrowa Dewi, Rina Dewi, Ztifania Dhian Anggraini, Fera Dhian Satria Yudha Kartika Diah Suwarti Widyastuti Dian Sisinggih Diana Zuhroh Diding HP, Diding HP Diffah Hanim Dinata, Benny Fika Diyasa, I Gede Susrama Mas Djai, Suhaiba Djarot B Darmadi Djarot B. Darmadi, Djarot B. Djoko Sutikno Dodik Prakoso Eko Hery Suwandojo Dono Indarto Dora, sylvia Terra Dwi aprilia, Ergi Dwi Arman Prasetya Edi Setiawan Edy Soedjoko Effendi, Mohammad Sofwan Eka Ardianto Eka Prasetiawati, Eka Eko Suyono, Eko Elbi Wiseno Elia Azizah, Elia Elva Wijayanti Emi Pujiastuti Endang Yektiningsih, Endang Entianopa, Entianopa Erika Erika Erislan, Erislan Ermawati, Muzaroah Erwin Sulistyo ESWAN, TUKIMUN, Eti Poncorini Pamungkasari Evi Triandini Fadhlilhaq, Isyqi Fahrudin Fahrudin Faisal Santiago, Faisal Fajriati, Unun Rizka Fakhri, La Jupriadi Fanesha N, Munna Fanisa, Fairuz Farda, Hilyatin Faruq Syah Permana Putra Fatma Nuraisyah, Fatma Fatmah Sari, Allan Ruhui Faturokhman, Agus Fauzan Azhmy, Muhammad Femiana Gapsari MF Ferdiana, Fita Ferry Ferdiansyah, Ferry Firda, Hidayatul Firlyandita, Marsyanda Firmansyah, Aldi Firmansyah, Fahrul Firnanda, Hendri Fitri, Anindo Saka Fitriani, Ana Fitrijati, Krishnoe R. Fitrika Mita Suryani Ganti, Muhammad Gayuh Utami Dewi, Francisca Geusan Akbar, Gugun Gilang Prasidya Jati Prasidya Jati, Gilang Prasidya Jati Giri Susanto Grace, Amelia Gracia S Ugut GS , Achmad Daengs Gunawan, Ardi Gunawan, Aynan Hismafanti Guntiyastutik, Enik Guntoro, Aji Guntur H, Guntur H Gustiana Mega Anggita Hadi Cahyadi Hamzani Hamzani Handayani, Endang Hanjarini, Gita Diana Hapis, Abul Ainin Hardono Hardono, Hardono Hari Eko Irianto Hari Wujoso Harianto, Aryono Fajar Harja, Jetno Harry Soesanto Hartanti, Novi Hasabi, Rafif Hasan, Muttaqin Hasanah, Alawiyah Hasnawati Hasnawati Hendar, Kus Hendratono, Tonny Heri Sutarto Herlina, Intan Hermansjah, Reynaldi Heru Santosa Hery Sutarto Hidayat, Muh. Taufiq Huda Astuti, Yusra Huda, Isra Ul Hulu, Edison Humaira, Zaitun Humayra, Siti Husaini, Brury A. Husna, Himatul I Gede Susrama Mas Diyasa I KETUT SUARDANA, I KETUT Ianah, Dewi Ibadurrahim, Dimas Rizqi Ida Ayu Putu Sri Widnyani Idrus, Fitriyanti N Ifnuari, Moh. Reza Ika Puspitasari Ikhwan Abduh Ilya, Rara Rahmadani Iman, Firda Garbo Indrawan, Lubis Tri Indriyani Indriyani Irfan, Budi Irianto, Bambang Setyobudi Irin Caisarina Isfanza, Nurmalita Isfia, Teuku Zawil Ismail, Mutiara Ayu Isnarto, Isnarto Isti Hidayah Isya, M. J. Darmawan Jalil, Erlinawati Jamil, Muh Jannah, Anggun Liatun Jannah, Desika Nur Jasmadi Jasmadi, Jasmadi Jingga, Bening Kirana Johanes Tendy Joi Ihalauw, John Judijanto, Loso Jumain, Jumain K. Wijayanti K., Anggraeni Dwi Kamaludin Kamaludin Karnain, Bambang Karnati, Neti Karsudjono, Anthonius Kesuma, Wahyu Puja Khairani, Cut Kharisma, Dayu Swasti Kharmytan, Yan Baktra Khoerunnisa, Khoerunnisa Khoiril Anam, Khoiril Kholifatunnisa, Fani Sri Kholiqowati, Heni Kisworo, Heru Koerul Anwar KOMPERI, Willem Kongchulagul, Natsuangkorn Konita, Mita Krisna Harimurti, Krisna Kristiani, Wahyu Kulsum, Siti Yasmin Fauzia Kunarti, Eny Kuneni, Erna Kurniati, Anik Kurniawan, Andrik Abadi Kurniawan, Rizal Mahdi Kurniawati, Ulfi Ledy Kushendar Kushendar, Kushendar Kusuma, Poppy Dian Indira Kusumastati, Widyahayu Warmmeswara Laila Kholid Alfirdaus Langgeng Setyono, Langgeng Lapanjang, Iskandar M Larombia, Sufiana Leni Pujiastuti Linda Weni Lisa Agustriyana Ludia Mersi, Ludia Lumanauw, Jimmy Lutfi Afifah, Lutfi M. Astri Yulidar Abbas M. Taufiq Noor Rokhman M. Yogi Riyantama Isjoni Ma'arif, Mohammad Zainul Madauna, Ichwan S Madyowati, Sri Oetami Maftuch Maftuch Maisarah, Sausan Nuhaa Malau, Parningotan Malinda, Reni Mangku Purnomo Marfu'ah, Nuun Marfuah, N. Marfuah Mariana Mariana Marimin Marimin Marindawati, Mieke Marisdayana, Rara Marsetio D, Marsetio D Marsisno, Waris Maryati Maryati Masduki Ahmad Masduki Masduki Maslivah, Vita Soniya Matin, Matin Maulida, Siti Mira Maxsi Irmanto Ma’arif, Putuhal Mega Nur Sasongko Meilinda, Iqra Mona Melda Yenni Melia Lau Miyasto Miyasto Moh. Awaludin Adam Mohamad Ardin Suwandi Mohammad Arif Ali, Mohammad Arif Mudiantono Mudiantono Muhammad Ikram Kido Muhammad Muhibbi MUHAMMAD TEGUH, MUHAMMAD Muhammad Zain, Muhammad Muharam, Muharam Munirwansyah Munirwansyah Musharyanti, Lisa Mustafa, Azhar Mustopa Mustopa Muttaqien, Kingking Muttaqin, Faisal N, Arief Budi Nadhila, Putri Nafiah Ariyani, Nafiah Nanang Indardi, Nanang nanang muhibuddin, nanang Nanda Arista Rizki Nanda, Gebrina Rizki Nata, Hadi Ni Putu Sinta Ayu Ningsih, Dwi Ratna Novi Arfarita Novi Irawati Nugraha, Isna Nugroho Bagus Nugroho Sihananto, Andreas Nugroho, Arief Budi Nugroho, Ibnu Sam Nugroho, Panji Agung Nuhrawangsa, Adi Magna Patriadi Nur Fitri Nur rohman Nur Rohman Nuramina, Rizkia Nurfitriana, Alifia Nurhattati Nurhkolis Hamidi Nurin Rochayati Nuriyawan, Denny Widhiya Nurjannah, Wahyu Nurkhoiriyah, Siti Nurlailah Nurlailah, Nurlailah Nurlaily, Nova Nurmawati, Erna Nurmin Arianto, Nurmin Nuun Marfuah Okta Ulfana, Vingki Oktari, Rina S. Oktaviani, Dwi Silvi Palayukan, Arthur Gamara Pamungkas, Agung Pamungkas, Pamungkas Paradila, Maisya Pardede, Hisar Parman Permana, Ichsan Permatasari, Rani Putri Pirngadi, Kasdi Prabowo, Dwi Priyo Pramono, Rudy Prasetia, Sahrul Eka Prasetyaningtyas, Hariyani Prasetyo, Farrel Brilliant Loudy Pratama Wirya Atmaja Pratama, Ucha Arief Pratami, Andhyarnita Pratinuari, Karina Prawinugraha, Azira Priambodo, Arinto Surya Prisilya, Erika Priyanto Priyanto PUJI LESTARI Purwanto Purwanto Purwitasari, Astri PUTERI APRILANI Putra, Chrystia Aji Putra, Muhammad G A Putri, Aqlima Putri, Syarafina Helmi Putri, Wanda Kusuma Putu Hadi Setyarini R. Sapto Hendri Boedi Soesatyo Rabbani, Akram Rachmadhany, Fitri Rachmawaty Rachmawaty, Rachmawaty Rafinda, Ascariena Raharjo, Mutiara Amalia Fadzilla Rahayu, Anugrah Restu Rahmad, Aulia Rahmani, Dhuyufur rahmani, yusuf safria Rahmi, Hayatul Ramli, Soehatman randy, riki Rayhana, Rayhana Redi Bintarto, Redi Renni Anggraini Renni Anggraini Reyhan, Mohammad Rezzy Eko Caraka Rhamadan, Muhammad Abdan Syakuro Fisyahri Rhomadoni, Rhomadoni Rianti, Winda Ribut Nurul Tri Wahyuni Rifqi Perdana, Andhika Rike Syahniar Rina Martini Rini Astuti Rini Prasetyani, Rini Rini Widianingsih, Rini Rini, Kurnia Setyo Riyadi, Farid Mukhtar Rizky Maulana Rizky Maulana, Rizky Rizqi, Fitri Nur Robert Kurniawan, Robert Robert Panjaitan, Juliantri Rochmad - Rofinalia, Rofinalia Rofiyati, Winda Romadhon, Bazargan Ropen, Ropen Rosi, Fauzi Fathur Rosti Setiawati Rosyida, Ratna Wirawati RUBEN DHARMAWAN Rubianto, Prasetyo Rudi Susanto, Dwiyono Rudianto Raharjo Rudy Kurniawan Rudy Soenoko Rudy, Yuwono Ruhdi Faisal Ruliyandari, Rochana rumiati, rumiati Runi Asmaranto Ruri Putri Mariska Rusdi Effendi Rusdi Rusdi S Siswanto S, La Suriadi S, Shafiyyah Safa'atullah, Muhammad Fajar Safira, Fathi Rahmah Safitri, Fika Maria Safrizal Rahman, Safrizal Sagita, Sagita Sahropi, Sahropi Said Junaidi Samosir, Omas Bulan Samsul Arifin Saputra, Yudhi Fajar Saputri, Nadia Keril Sari, Yuni Andira Sarifudin, Sarip Sarni Maniar Berliana, Sarni Maniar Sembiring, Edison Sembiring, Edison C Sembiring, Edison C. Senja, Safira Nurmala Septiana, Atika Septiani, Shelomita Elisabeth Sesanti, Neni Wahyu Setiono Setiono Setiyadi, Angga Setya Rahayu SF, Fanny SG, 7Hardiman Shabariah, Rahmini Shinta Dwi Cahya Sholeh, Abdurrohman Sholikin, Atfalus Siagian, Arjon Sibarani, Michael Alexander Justin Audison Silvia Rahmi Simanjuntak, Betty Siti Baitul Mukarromah Siti Helmyati Siti Lestari Siti Maghfiroh Siti Rohmah Siti Roudhotul Jannah, Siti Roudhotul Siti Zulaikha Sitti Rahmah Situmorang, Santonius Sjakbani, Sjahru Slamet Wahyudi Soehatmanramli, Soehatmanramli Sofyan M. Saleh Sok, Vann Solehan Solehan Soliha, Arifatus Solihin, Ikin Solvina, Maretta Sonief, A. As’ad Sony Heru Priyanto Sri Sumartiningsih Sri Wahyuti Sri Yuliawati Stevani, Devi Subakir Subakir Sudjito Soeparman Sugiarto, Budi Sugiarto, Lily Yuliani Sugiono, Darso Sukim, Sukim Sukmana, Tatas Aldian Sukmiyati Agustin Sukri, Hanifudin Sultana, Marufa Sumarni Sumarni Sunarmi Sunarmi Sunarmo, Agus Suparlinah, Irianing Supina, Supina Supriadi, Devie Rienzani Suradi Suradi Surahman, Dedy Suroso Suroso Suryani, Atik Suryanti Susanto, Dwiyono Rudi Susanto, Giri Susi Widiawati, Susi Susilo, Dwi Joko Sutini Sutini, Sutini Sutopo, Dhanny Septimawan Sutrisno, Sutrisno Suyato Oei Suyitno Suyitno Syafrullah, Syafrullah Syahbuddin Syahbuddin Syahida, Inayati Syahrir Syahrir Syahrul, Muhammad Reza syahyunan syahyunan Syaiful Amin Syakinah, Rohmatun Syamsir, Andi SYAMSU ALAM Sya’ban, Ma’ruf T Samsul Hilal Takashi Nakatsuji Takdir, Muh Takwin, Bagus Ansani Tambunan, Darwin Tan, Jacob Donald Tantoro Harmono Tasmadi Tastama, Andita TATAN SUKWIKA taufixurohman, hafizh Teguh Dwi Widodo Teguh, Harsono Tejo Nugroho Tengku Isni Yuli Lestari Putri Thamrin, Meliyanti Thirayoot Limanoond Thoyyibah, Kalimah Titis Hutama Syah, Titis Hutama Tjokroprawiro A, Tjokroprawiro A Tjuk Oerbandono Tonang Dwi Ardyanto Tony, Heri Tran, Phan Duc Anh Tri Agustina, Tri Tri Yuli Pramana Triandi Pradana Trianung Djoko Susanto, Teguh Triwibowo, Wahyu Triyono, Heru Ginanjar ulfa al-aluf, Roihani Ulya, Lulu Fathnatul Umi Pratiwi, Umi Ummiani Hatta Unifah Rosyidi, Unifah Urbaningtyas, Laela Novita Urifah, Dewi Utami, Cut Sabrina Utami, Selfi Utommo, Danang Afri Vina Amelia, Vina W, Irawan Dodi Wahjudi, Januar Wahyu Mahendra Wahyu Santoso Wahyudi, Dian Arif Wahyudin, Geulis Gemala Wahyuti, Sri Waluyo Widodo Wardana, Melyana Febryantari Wardati, Wardati Wardi Wardi Wardoyo, Eko Wasesa, Tjandra Wawan Wawan Wibowo, Mars Caroline Wibowo, Wisnu Widhiyastuti, Endang Widiawan, Aditia Bagus Widodo, Ibnu Sam Widya Kusumaningsih Widyarini Widyarini, Widyarini Wijaya, Novan Alrizki Wijaya, Riko Setya Winata, Felix Andhy Wiratna, Wiratna Wirya Atmaja, Pratama Wisnu Probo Wijayanto Wisudanto Wisudanto Wiwit Pratiwi Wiwit Pratiwi, Wiwit Wiwit W, Hari Wiyasa, I Gede Wrisnijati, Dita Wrisnijati, Dita Wuni, Cici Yandra Arkeman Yang, Chia-En Yansah, Dovi Yashinta Theedens, Anastasia Yaslis Ilyas Yoestini Yoestini Yudha Pratama, Maulana Yudi Suryawan Yudiawan, Rohman Yuliani, Desi Yulistiarini Yuniarto, Budi Yunus Yunus Yusputri, Rafiqa Muhnita Yusria Darma Yusriyati Nur Farida Zaenuri Mastur Zahra Haj Pertiwi Zula, Aidil Ambya