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All Journal Al-Qisth Law Review Caraka Tani: Journal of Sustainable Agriculture Journal of Energy, Mechanical, Material and Manufacturing Engineering The Indonesian Journal of International Clinical Legal Education Jurnal Rekayasa, Teknologi, dan Sains Jurnal Impresi Indonesia Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Agrifarm Jurnal Dedikasi Hukum Indonesia Law Reform Journal (ILREJ) Notary Law Journal Jurnal Indonesia : Manajemen Informatika dan Komunikasi
Sofyan Arief
University Of Muhammadiyah Malang
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mechanical Engineering Social Sciences

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Performance of Universities based on Research Output Koto, J; Syukri, M; Sofyan Arief, Dodi
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 61 No 1 (2018): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (666.133 KB) | DOI: 10.36842/jomase.v61i1.12

Abstract

Performance of universities based on research ranking has become a trend to gauge the credibility and quality of the university. One of the parameters used to assess university ratings is the result of research in the form of papers, patents, copyrights. Therefore, universities in the world compete to publish research results in the form of journals or conferences and others. This paper discusses on performance of universities based on research output. The results of research index in developed countries shows that there is not much change from year to year, it may be said that it almost reaches a saturation point. On the other side of the earth, the increase in research results in ASEAN countries is still high, reaching 70-80 percent. More impressive, universities in Indonesia have tried very enthusiastically in the study as the percentage increase was 500%.
Uncertainty of The Substance of Article 18b in Creating Legal Norms Regarding The Determination of Special Regions in Indonesia Rifqi, Achmad Daffa Meilana; Toyiby, Vicko Wahyu Rifan; Arief, Sofyan
Jurnal Impresi Indonesia Vol. 4 No. 4 (2025): Indonesian Impression Journal (JII)
Publisher : Riviera Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58344/jii.v4i4.6410

Abstract

Special Regions are regions that have special government regulations that sometimes deviate from general regulations. The purpose of this writing is as a source of discussion. There are no regulations that regulate in detail the classification or conditions that determine why an area can be said to be a special area or a special area. In the discussion of this journal, it was also found that there was a lack of synchronization of the Legislation for Determining Special Regions with other Legislation. However, the existing law only specifically discussed the Province of the Special Region of Yogyakarta. Therefore, there is a need for a law that regulates in detail the classification and requirements regarding special areas or special areas.
Pengenalan Bahasa Isyarat Bahasa Indonesia Real-time Menggunakan Metode SP-Tree Sofyan, Arief; Alwanto, Hilmi; Arif, Sulthan Cendikia
Jurnal Indonesia : Manajemen Informatika dan Komunikasi Vol. 6 No. 2 (2025): Mei
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat (LPPM) STMIK Indonesia Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63447/jimik.v6i2.1371

Abstract

Real-time Indonesian sign language recognition faces several challenges, the most prominent of which is the diversity of hand gestures and different expressions. Often, automated systems face difficulties in interpreting these highly variable gestures, which in turn results in decreased recognition accuracy and efficiency. To improve the performance of sign language recognition in this study, the SP-Tree method is proposed, which utilizes a spatial tree structure to group hand gesture data based on spatial and temporal features. This allows for a faster and more accurate sign language recognition process. It is expected that this technique can accelerate sign language recognition with a high level of accuracy and real-time response, which is very important for everyday applications. We used a public dataset covering various hand gestures in Indonesian sign language to test this technique. The results showed that the SP-Tree method had an accuracy of 92 percent, an F1 score of 0.90, and a feature loss of 0.08. Compared with existing conventional sign language recognition techniques, these figures show significant improvements. The results indicate that the SP-Tree method is an effective way to identify Indonesian signs in real-time. This method has the advantage of being able to interpret and group hand gestures more precisely and efficiently, improving the interaction between the user and the system. We hope that this research will help develop assistive technology for people with hearing disabilities. In the future, it will also provide opportunities to use this technique in other sign languages.
PENGARUH TEGANGAN LISTRIK TERHADAP KETEBALAN LAPISAN DAN LAJU KOROSI (MPY) HASIL ELEKTTROPLATING PLAT BESI STRIP DENGAN PELAPIS TEMBAGA Arkha, Abdullah; Budiarta, Usman; Sofyan, Arief
Jurnal Rekayasa Teknologi dan sains Vol 2, No 1 (2018): Jurnal Rekayasa, Teknologi, dan Sains
Publisher : Fakultas Teknik Universitas Malahayati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jrets.v2i1.1117

Abstract

Proses pelapisan dengan cara listrik atau elektroplating adalah proses pelapisan logam dan non logam yang menggunakan listrik arus searah melalui metode elektrolisis. Lapis listrik memberikan suatu perlindungan logam dengan memanfaatkan logam-logam tertentu sebagai lapis lindung misalnya tembaga, nikel, seng krom, emas, perak, kuningan, perunggu, dan lain sebagainya. Tujuan dari penelitian ini adalah mendapatkan pengaruh tegangan yang digunakan terhadap ketebalan lapisan tembaga pada plat besi serta laju korosi yang terjadi pada pada variasi variabel tegangan sebesar 6, 9, 12, 15 volt, dan menentukan hasil pelapisan yang paling baik dan paling tebal serta memiliki laju korosi terendah. Material yang digunakan untuk menjadi spesimen pada penelitian ini adalah plat besi dengan dimensi berurutan panjang x lebar x tebal adalah 80 x 22 x 2 dalam satuan milimeter. Untuk bahan pelapis menggunakan larutan tembaga sianida (CUCN) dengan waktu pencelupan selama 20 menit. Untuk perhitungan laju korosi menggunakan metode pengurangan berat dari perendaman di larutan korosif, dan larutan korosif yang dipilih adalah campuran larutan asam nitrat (HNO3) 40 ml dan aquades 60 ml. Dari hasil pengaruh tegangan yang diberikan pada proses elektroplating terhadap ketebalan lapisan pada spesimen, tebal lapisan rata-rata tertinggi di dapat pada spesimen yang berlabel 5 yaitu 0,12mm (120 mikron) yang mana tegangan yang diberikan sebesar 15 volt. Dari hasil pengkorosian yang dilakukan, laju korosi rata-rata terendah di dapat juga pada spesimen yang berlabel 5 yaitu 213,67 Mpy.Kata kunci : elektroplating, laju korosi (Mpy), pelapisan tembaga, variasi tegangan elektroplating.ABSTRACT: The Effect Of Electric Voltage On The Layer Thickness And Corrosion Rate (Mpy) Elekttroplating Results Plat Iron Strip With Copper Copper. Electrical coating process or electroplating is a process of coating a metal object by electrolytic deposition with another metal. Electroplating enables metal protection by utilizing certain metals as a protective metal like copper, nickel, zinc, chromium, gold, silver, brass, bronze etc. The objective of this study was to identify the effect of electricity voltage for electroplating process towards copper layer thickness on iron plate and corrosion rates for voltage variations on 6, 9, 12 and 15 volt. As addition, this study tried to find out the best coating result, the thickest and the lowest corrosion rate. The material used as specimen for this study was an iron plate with dimension length x width x thick, 80 x 22 x 2, respectively (in millimeter). The coat was made by immersing the plate into cyanide solution (CUCN) for 20 minutes. For calculating rate of corrosion through weight reduction method by submersing it into corrosive solution; the corrosive solution was compound from 40 ml nitric acid (HNO3) and 60 ml water. Result showed that the thickest layer was achieved on specimen with 5 label, 0.12 mm (120 micron) with 15 volt. The corrosion process revealed that the lowest rate of corrosion happened on specimen with label 5 for 213.67 Mpy.Keywords : electroplating, rate of corrosion (Mpy), copper coating, electroplating voltage variation.
Co-Authors , Andri Agus Zainudin Alwanto, Hilmi Amir Hamzah Anindito Purnowidodo Arief Rizki Fadhillah Arif, Sulthan Cendikia Arkha, Abdullah Azhar Muttaqin Budiarta, Usman Ely, Azis Erfan Dani Septia Fauzan, Fauzan Herwastoeti, Herwastoeti Koto, J M Syukri Maftuchah Maftuchah Moch. Agus Choiron Perdana, Arya Putra Rifqi, Achmad Daffa Meilana Sihombing, Galuh Leonardo Siti Rofida Toyiby, Vicko Wahyu Rifan Umi Sakdiyah Rahmawati Widodo, Teguh Dwi Wirawan, Willy Artha