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All Journal Jurnal Program Magister Ilmu Sosial Universitas Tanjungpura Jurnal Kebijakan Kesehatan Indonesia Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Syntax Literate: Jurnal Ilmiah Indonesia SAR (Soedirman Accounting Review): Journal of Accounting and Business Biosaintifika: Journal of Biology & Biology Education Unes Law Review MAT-EDUKASIA ComTech: Computer, Mathematics and Engineering Applications Jurnal Manajemen Bisnis dan Kewirausahaan Jurnal Bina Manajemen Jurnal Surya Teknika Business Economic, Communication, and Social Sciences Journal (BECOSS) Jurnal Media Ekonomi PIPER TEACHING : Jurnal Inovasi Keguruan dan Ilmu Pendidikan Jurnal Telkommil Jurnal Pengabdian Masyarakat (ABDIRA) Jurnal Paradigma Akuntansi Journal of Social Research eCo-Fin Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Edumatica: Jurnal Pendidikan Matematika Jurnal Informatika Sewagati International Journal of Multidisciplinary Approach Research and Science Jurnal Abdimas Sosial, Ekonomi, dan Teknologi Prosiding Dedikasi: Pengabdian Mahasiswa Kepada Masyarakat JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah)

Yohanes Yohanes

Fakultas Keguruan Ilmu Pendidikan Universitas Terbuka

Author-ID : 423279

Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mathematics Mechanical Engineering Nursing Physics Public Health Social Sciences Other

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Pengaruh volatilitas harga minyak, kurs, dan BI rate terhadap indeks harga saham gabungan 2018-2022 Yohanes, Yohanes; Setyawan, Ignatius Roni
Jurnal Manajemen Bisnis dan Kewirausahaan Vol 8 No 1 (2024): Jurnal Manajemen Bisnis dan Kewirausahaan
Publisher : Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/jmbk.v8i1.28396

Macroeconomic factors that could influence IDX’s (JKSE) composite stock price index are crude oil prices, exchange rates from Rupiah to the US dollar, and BI rate. These are three independent variables that take into account several factors and situations in the world economy. The prices of crude oil are an indication of global demand. The exchange rate is based on the economic situation in Indonesia. In response to economic conditions in Indonesia, the Bank of Indonesia has a policy based on the BI Rate. These three variables indicate that when the economy is strong, the stock index also strengthens. The use of the TARCH method explains the volatilities of independent variables and their influence on dependent variables. The TARCH method is used when asymmetric volatility is present. The results of this research show crude oil prices and BI Rate positively and significantly affect the JKSE. This means when the economic condition is strong, the stock index will also be affected positively. While the Rupiah exchange rate has a negative and significant impact. This is because if the conversion rate decreases (Rupiah strengthens), it indicates that the Indonesian economy is strong. Simultaneous tests also show that all three variables influence the JKSE. These variables are examined to understand the impact of macroeconomic variables on the stock index, so readers are expected to have insights into the global economic situation before investing in stocks.

Sistem Inventory Pada Gudang Aksesoris PT. Mulia Knitting Factory Yohanes, Yohanes; Wahidin, Ahmad Jurnaidi
Jurnal Informatika Vol 1 No 1 (2022): Jurnal Informatika
Publisher : LPPM Universitas Nias Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57094/ji.v1i1.353

Information can be obtained more easily and quickly because of the existence of information technology, one of the uses of information technology is the application of warehouse inventory. PT. Mulia Knitting Factory already has several applications that serve business processes including purchase transactions, stock up to payment processing. However, not all sections have implemented this. Because for now the existing application is only for the input and output of goods from the warehouse, for example in the accessories warehouse. The stock file is not only needed by the warehouse department, but also by the purchasing department. With manual data collection, the inventory of goods is not immediately updated, so that errors in raw material inventory information still often occur. The author makes a web-based inventory application design that will be used by the accessories warehouse section and then can also be viewed or controlled by the purchasing department so that it can make it easier to control the purchase of goods and accessories needed. The research was conducted using the waterfall method to build applications so that the resulting applications are better and of higher quality. The resulting application is then tested using black box testing with the results of all tests being accepted, so the application can be used.

Pengaruh Variasi Interlayer Terhadap Hasil Sambungan Material Dissimilar Menggunakan Mesin Las Gesek Rotary Tegak Bar Plate Yohanes, Yohanes; Rafizan, Rafizan; Legisnal Hakim
JURNAL SURYA TEKNIKA Vol. 11 No. 1 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i1.6665

The aim of this research is to determine the effect of variations in interlayer thickness on welding time, interface area and hardness values in dissimilar material welded joints using a bar-plate upright rotary friction welding machine. The method used in this research: rotational speed 2,613 rpm, friction pressure 0.5 MPa, forging pressure 0.7 MPa, forging time 10 seconds and interlayer variations (without interlayer, 0.3 mm, 0.5 mm and 1 mm). Tests used in the research: liquid penetrant test, metallography, and Vickers. It can be analyzed that interlayer variations have an effect on welding time. The time results obtained from using an interlayer with a thickness of 0.3 mm resulted in a time of 142.1 seconds, a 0.5 mm interlayer of 168.7 seconds, and a 1 mm interlayer of 204.4 seconds. The results for specimens without using an interlayer obtained a time of 71.3 seconds. The thicker the interlayer used, the longer the welding time. In observing the interface area, giving interlayer variations of 0.3 mm, 0.5 mm and 1 mm had an effect on cracks and cavities where all specimens were not found to have cracks or cavities, but voids were found in welding without allowing interlayer variations. In testing the hardness of interlayer variations with a thickness of 1 mm, the highest hardness was found in the interface area with an average hardness value of 169.56 VHN. Meanwhile, the lowest hardness value in the interface area results from variations without an interlayer with an average hardness value of 149.07 VHN

Pengaruh Geometri Basin Terhadap Aliran Vortex: Kajian pada Basin Conical, Conical Convex dan Silinder dengan CFD Kurniawan, Iwan; Heri Siswanto; Yohanes, Yohanes; Romy, Romy; Amir Hamzah
JURNAL SURYA TEKNIKA Vol. 11 No. 1 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i1.7187

This study aims to evaluate the influence of basin geometry on the formation and characteristics of vortex flow using Computational Fluid Dynamics (CFD). Three types of basin geometries were investigated: cylindrical, conical, and conical convex. CFD simulations were conducted to observe the velocity distribution, and vortex flow patterns generated by each basin. The results indicate that the conical basin produces vortex flows with higher intensity compared to the cylindrical and conical convex basins. The conical basin demonstrated a more focused flow pattern and higher vortex concentration around the central axis, contributing to enhanced vortex formation efficiency. Although the cylindrical and conical convex basins also generated vortex flows, they exhibited a more dispersed velocity distribution and less stable vortices. These findings provide important insights for the design and optimization of vortex turbine systems, particularly in the context of renewable energy applications.

Pelet Unggul: Inovasi Teknologi Tepat Guna dari Sampah untuk Peningkatan Produktivitas Ternak Lele di Lamigot Ys Farm Pakusari Palupi, Bekti; Rahmawati, Istiqomah; Rizkiana, Meta Fitri; Rafif, M. Attar; Tarigan, Eigiya Nina; Herdianto, Dimas Nur; Yohanes, Yohanes; Shofiah , Laila Nur
Sewagati Vol 9 No 1 (2025)
Publisher : Pusat Publikasi ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j26139960.v9i1.2488

Sektor peternakan dan perikanan merupakan pilar utama ketahanan pangan di Indonesia, dengan budidaya ikan lele menjadi pilihan utama karena kemudahannya dan tingginya konsumsi oleh masyarakat. Data BPS Jawa Timur menunjukkan peningkatan produksi ikan lele dari 127.539 ton pada tahun 2020 menjadi 136.437 ton pada tahun 2021. Namun, masalah utama yang dihadapi peternak, khususnya skala kecil dan menengah seperti UMKM Lamigot YS Farm di Kabupaten Jember, adalah mahalnya harga pelet pakan ikan. Untuk mengatasi kendala ini, program pengabdian masyarakat ini menawarkan solusi berupa pengembangan Teknologi Tepat Guna (TTG) dengan menciptakan mesin pencetak pelet menggunakan bahan baku sampah organik. Solusi ini bertujuan untuk mengurangi biaya produksi, mendukung pengelolaan limbah berkelanjutan, dan meningkatkan produktivitas serta kemandirian peternak. Kegiatan ini meliputi sosialisasi, pelatihan, dan pendampingan teknis, diharapkan dapat meningkatkan pemahaman dan keterampilan peternak dalam memproduksi pelet pakan ikan secara mandiri. Dari hasil pengamatan selama 2 minggu, lele yang diberi pelet sampah organik bertambah massanya menjadi 9 gram, sementara yang diberi pelet komersial hanya memiliki massa 8,3 gram. Hal ini menunjukkan bahwa inovasi pelet dari sampah organik memiliki kualitas yang lebih baik daripada pelet komersial sehingga layak dikembangkan.

Rancangan Kerja Sama antara UMKM Sabun dari Susu Kambing dan Perusahaan Hilton Yohanes, Yohanes; Gunawan, Theresia
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : Syntax Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36418/syntax-literate.v10i3.57897

This study examines the design of a collaboration between SMEs producing goat milk soap and the Hilton hotel chain, aiming to identify an effective and sustainable partnership model. Using a qualitative approach with a case study design, the research involves in-depth interviews, observations, document analysis, and focus group discussions with various stakeholders. The results reveal that successful partnerships require knowledge and technology transfer, production capacity enhancement, quality standardization, and joint marketing strategies. The findings indicate significant potential for improving SME competitiveness, diversifying hotel products, and promoting local economic development. However, challenges such as differences in operational scale, investment needs, and regulatory adaptation need to be addressed. The proposed partnership model emphasizes the importance of long-term commitment, human resource development, and integration of sustainable practices. This research contributes to the understanding of SME-large enterprise partnership dynamics and offers practical implications for policymakers and business practitioners.

Development of Turn-milling in Conventional Lathe Machine Yohanes, Yohanes; Handika, Roki; Jefryanto, Gusmardani; Yulianto, Evon
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 53 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)

Turn-milling is a machining method with a system of merging turning and milling operations, which the workpieces and cutting tool perform rotary motion synchronously to optimize the disposal process of chip materials. Development of turn-milling can be done on the lathe and milling conventional machining. The purpose of this study is to modify a conventional lathe with a stationary cutting tool and use a single cutting edge into a rotary tool using 4 (four) cutting sides (multy point cutting). In the manufacture and installation of rotary tool on conventional lathes, tools are made portable and can work on tangential, orthogonal and co-axial turn-milling systems. For the orthogonal and co-axial operating system of the turn-milling are divided into up and down operating systems. In this research the phenomenon of material disposal process of the work-piece surface was investigated. In the process of turn-milling test, the chip was removed automatically as the turn of the cutting edge of the endmill cutting tool. The high decreasing of cutting knife rotation during testing was resulted a space during the process of disposal of material. Sequence, it was occurred pores or cavities in the work-piece.

Performance Analysis of Flywheel Addition on Drive System of Rotary Friction Welding Machine Yohanes, Yohanes; Siregar, Erikson; Susilawati, Anita; Badri, Muftil
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 52 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)

Friction welding is a solid-state welding without the use of filler metal by using pressure method where by two workpieces to be connected. It is placed in contact and regulated relative motion in pressure, so that on the contact surface being heat (close to the metal liquid point), which form the metal connection. A friction welding machine in the laboratory of technology production of the University of Riau has some disadvantages, namely the electric motor as a driver head stock stems that are often damaged due to overheating such as excessive during welding. Thus was interfering with the welding process due to damage to the electric motor. Therefore, this paper purpose is carried out the development of friction welding tool by using flywheel. The Flywheel stores energy during high engine speed, and passes it during low engine speeds to produce a steady turn. In this study used three flywheels with a diameter of 250 mm, which each thick of 10 mm, 20 mm and 30 mm. From the test is obtained the value of the average tensile strength on each flywheel that is 522.736 MPa, 510.648 MPa and 531.79 Mpa.

Effects of Electrode Velocity Variations and Selection of Electric Current Against Quality Welding Results Mild Steel on SMAW Welding Yohanes, Yohanes; Harahap, Muhammad Alhafih
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 57 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)

One of the welding technology is SMAW (Shielded Metal Arc Welding) has its own advantages, such as, the current as the heat source used can be varied, easy to be used in various welding positions, penetration and the electrode width of welding can be adjusted. In order for proper welding speed, this research uses SMAW welding machine with sliding adaptive vertical system that varies the flow and welding speed to the welding characteristics, by doing visual observation and mechanical properties using tensile test. The welding speed is controlled using arduinouno with stepper motor rotation as the driving force. The material used is mild steel which has been tested for its composition content, the groove used is single V groove with 60° and electrode used is E6013 electrode. The number of specimens varied by 9 specimens with the highest tensile strength is 543,48 MPa and the lowest value is 253,75 MPa. Micro welding structure is determined by many factors including heat input, current strength, welding speed, and cooling rate. In this study the HAZ area has a larger grain structure than base metal and weld metal

Sikap Terhadap Konsentrasi Belajar Siswa Pada Mata Pelajaran Fisika di Sekolah Menengah Atas Puspitasari, Tari Okta; Putri, Yolanda Eka; Yohanes, Yohanes
JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) Vol. 3 No. 2 (2019): JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) - November 2019
Publisher : Universitas Nurul Huda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30599/jipfri.v3i2.537

The purpose of this study is to explore the relationship between attitudes and student learning in physics. The research method used is quantitative research with associative design. The research instrument used was a questionnaire. The data analysis technique used is descriptive statistical analysis and inferential analysis. Descriptive statistics used are the mean, median, mode, and standard deviation. Whereas the inferential statistics that can be used is the collaborative test. Based on research that has been done, there is a positive relationship between attitude and concentration in physics at SMAN 8 Jambi City which is also quite strong when viewed from the sig value generated, which is equal to 0.04.

Co-Authors Abdillah, Marco Ade Susanti Ahmad Jurnaidi Wahidin Aldi, Jupri Amir Hamzah Andres Dharma Nurhalim Anita Susilawati Anuar, Kaspul Arga, Vincensius Aryo Sasmita Augustpaosa Nariman Augustpaosa Nariman Awatif, Awatif Bekti Palupi Cahyono, Fajar Tri Cornelio Purwantini, Cornelio Destiani, Anisya Restu Dimas Pramita Nugraha Donara, Geovanny Elwi Danil Ependi, Rinto Fajri, Aidil Fakhri, Fakhri Farhan, M Alif Fatiya, Fatiya FEBRIANTI, MEIRISKA Fitmawati Fitmawati Gusstafri, Haji Habeahan, Hosea Habli, Mustafa Hakim, Hasanul Hamali, Sambudi Hamidi, Yulis Handayani, Morelia Nurul Handika, Roki Harahap, Muhammad Alhafih Harefa, Cahayu Prildana Henny Hendarti Herdianto, Dimas Nur Heri Siswanto Herlina Kurniawati Hidayati Rais Hilwan Yuda Teruna Hutabarat, Veronica Wijaya Ignatius Roni Setyawan Ihsan, Yaser Ilham, Robby Aprilo ishar, muh Istiqomah Rahmawati Iwan Kurniawan Jayadi Jayadi Jefryanto, Gusmardani Jefryanto, Gusmardani Johanes Johanes, Johanes Khairul Anwar Legisnal Hakim Leonard Leonard Lubis, Fahri Asrizal Lukman, Luvenia Andrius Lutfan Lazuardi Madina, Virginaya Flara Marliana, Nana Meta Fitri Rizkiana mubarok, ikhsan Muchtar, Muhammad Arafat Muftil Badri Mughiroh, Hayatul Muhammad Firman Annur Muhammad Jainuri Munandar, Putra Aris Nainggolan, Johannes Riomanto Nani Mulyati Narabewa, Ario Nazhifah, Nazhifah Ningrum, Alieffia Farda Nuriyadi, Nuriyadi Panggabean, Surta MD Pindo Evans Manuel Damanik Polim, Vincent Pramija, Syafirman Prasetyo, Brian Agung Cahyo Pratama, Zikra Mulya Prilianto, Danuardi Restu Purnawan, Trio Puspita, Shandy Puspitasari, Tari Okta Putra M, Rachel Pramana Putra Partomuan, Putra Putra, Ivan Fadillah Putri, Yolanda Eka R Sudarwo, R Rafif, M. Attar Rafil, Rafil Rafizan, Rafizan Ramadani, Cici Rasyid, Kurniawan Ridwansyah, Arrijal Romy Romy Roni, Guido Salsabila, Sofia Putri Salsabilla, Putri Annisa Saputra, Agus Saputri, Anggraini Dwi Sari, Imelia Satriardi Satriardi Shofiah , Laila Nur Sinaga, Markus Siregar, Erikson Sri Wahyuni Sunny Ineza Putri Sutanta Sutanta, Sutanta Tania, Stefani Tarigan, Eigiya Nina Thamrin, Agus Theresia Gunawan Wanda Wanda Wijaya, Sidiq Nugraha Wulan Dari, Wulan Yuhelson Yuhelson Yulianto, Evon

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