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All Journal Jurnal Penelitian dan Pengembangan Pendidikan Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Jurnal Teknik ALGORITMA : Journal of Mathematics Education Jurnal Ilmiah Pendidikan Matematika Al Qalasadi Jurnal Serunai Bahasa Indonesia Unri Conference Series: Community Engagement Asimetris: Pendidikan Matematika dan Sains Journal of Bioprocess Chemical and Environmental Engineering Science International Journal of Economic, Business, Accounting, Agriculture Management and Sharia Administration (IJEBAS) As-Sidanah : Jurnal Pengabdian Masyarakat Jurnal Transformasi Administrasi Catimore: Jurnal Pengabdian Kepada Masyarakat Jumper : Journal of Educational Multidisciplinary Research International Conference on Health Science, Green Economics, Educational Review and Technology (IHERT) Jurnal Teknologi & Rekayasa Sipil Jurnal Infinity JURNAL REKAYASA KIMIA & LINGKUNGAN
Edy Saputra
STAIN Teungku Dirundeng Meulaboh
Religion Arts Humanities 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 Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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Sintesis Kulit Telur Ayam/Fly Ash Menjadi Katalis Cao/Fly Ash Untuk Reaksi Transesterifikasi Minyak Sawit Off Grade Menjadi Biodiesel Desly Fadilla Simbolon; Zuchra Helwani; Edy Saputra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Heterogeneous solid base catalyst by modificated Eggshells through calcination, hydration, dehydration methods with iron powder through impregnation method to load calcium oxide with eggshells as precursor. The catalyst with the highest activity is obtained when the calcination temperature of 900°C and the calcination time of 3 hours under transesterification reaction conditions of a molar ratio of methanol/oil 6:1, catalyst dosage of 6% by weight, temperature of 70 °C for 2 hours with yield biodiesel results reached 86.20%.Keyword: biodiesel, calcination, calcium oxide, catalysts, iron powder.
Pengaruh Binder Akrilik terhadap Sifat Fisik dan Mekanik Mortar Polimer Sitanggang, Ronal Rius; Ismeddiyanto; Edy Saputra
Jurnal Teknologi dan Rekayasa Sipil Vol. 2 No. 1 (2023): VOL 2 NO 1 (JULI 2023)
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56208/jtrs.v2.i1.hal1-9

Abstract

Initial damage to the structure occurs in the outer layers of the affected surface exposure to the peat environment and the static and dynamic movement of the structure. To prevent structural damage, the latest technological innovations are needed in the use of mortar constituent materials to increase the strength of the mortar. Polymer mortar is a composite material formed from a mixture of fine aggregates, cement, water and polymer binders or binders with a certain level. The purpose of this study is to determine the effect of the use of acrylic binders on the physical and mechanical properties of polymer mortars and the influence of peat water on the future of the mortar. The substitution of acrylic binders with water consists of 3 substitutions, namely 20%, 30% and 40% and 0% as controls. The results of the search for acrylic binders on the mortar mixture obtained a minimum physical property value at 30% acrylic use in the 28-day test, namely. The porosity value of the mortar is 9.80%, the waterabsorption value of the mortar is 4.67% and 4.72%, and the sorptivity value of the mortar is 0.70. From the value of physical properties obtained the degree of tightness of the polymer mortar well with the use of acrylic binders in the mixture. For the mechanical properties of polymer mortar, compressive strength testing is carried out with optimum compressive strength at the use of 30% acrylic. The value of the compressive strength of the mortar is 33 Mpa.
PENGEMBANGAN BAHAN AJAR PROGRAM LINEAR BERBANTUAN LINDO SOFTWARE Rahmy Zulmaulida; Edy Saputra
Jurnal Infinity Vol 3 No 2 (2014): Jurnal Infinity Vol 3 No. 2 September 2014
Publisher : IKIP Siliwangi and I-MES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/infinity.v3i2.p189-216

Abstract

ABSTRAKPenelitian ini bertujuan untuk menelaah hasil belajar mahasiswa yang mendapat perkuliahan program linear dengan pengembangan bahan ajar berbantuan lindo software. Permasalahan dalam program linier adalah permasalahan yang berhubungan dengan pencapaian fungsi sasaran atau masalah optimasi, yaitu yang bertujuan memecahkan masalah dengan cara terbaik, sesuai dengan prinsip ekonomi yang berorientasikan untuk senantiasa menekan (meminimalkan) pengeluaran untuk mendapatkan hasil yang maksimal. Bahan ajar adalah segala bentuk yang digunakan untuk membantu guru/ instruktur dalam melaksanakan kegiatan belajar mengajar di kelas. Bahan yang dimaksud bisa berupa bahan tertulis maupun bahan tidak tertulis. Bahan ajar merupakan informasi, alat dan teks yang diperlukan guru/instruktur untuk perencanaan dan penelaahan implementasi pembelajaran. Lindo (Linear Interaktive Discrete Optimizer) adalah software yang dapat digunakan untuk mencari penyelesaian dari masalah pemrograman linear. Dengan menggunakan software ini memungkinkan perhitungan masalah pemrograman linear dengan n variabel. Prinsip kerja utama Lindo adalah memasukkan data, menyelesaikan, serta menaksirkan kebenaran dan kelayakan data berdasarkan penyelesaiannya.Kata Kunci    : Bahan Ajar, Program Linear, Lindo Software  ABSTRACTThe aim of this rsearch is to analyse the result of students' achievement in the lesson of linear program with the developing of teaching material with the assistance of software lindo.The problem in linear prgram is the problem which is related to the reaching of the target function or the problem of optimation that is aimed to solve the problem by using the best way which is suitable with ecomical principle that is oriented to maximalize the incomes but minimize the outcomes. Teaching material is all things that is used to help teachers/ instructors in teaching and learning process in the classroom. It can be both written and unwritten materials. It is such an information, things n texts those are needed by teachers/ instr to do such a planning n analyzing toward teaching implementation.Lindo is a software that can be used to find out the solving of linear program problems. By using this software, it is possible to count the problem of linear problem with n variable. The main principle of lindo is by inputting the data, solving the data, n estimating the truth n yhe properity of the data based on its' discussion result.Keywords: Teaching Material, Linear Program, Lindo Software
KARAKTERISTIK MORTAR POLIMER DENGAN BINDER AKRILIK PADA AIR NORMAL DAN KONDISI NORMAL Rianti Ratna Dewi; Ismeddiyanto; Edy Saputra
Jurnal Teknologi dan Rekayasa Sipil Vol. 3 No. 2 (2024): VOL 3 NO 2 (NOVEMBER 2024)
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jtrs.3.2.25-33

Abstract

Mortar is an important binding matrix in construction, playing a role in protecting structures from damage and cracking. Handling seepage and corrosion in structures is a major concern. Research shows that the addition of Acrylic Binder to mortar mixes improves weathering, chemical, abrasion resistance and adhesive strength. This study aims to assess the characteristics of mechanical and physical properties of mortar with the addition of acrylic binder in polymer mortar. The results of the study with the addition of acrylic binder through treatment in normal water and normal conditions with a variation of 3 substitutions namely 40%, 30%, 20% and 0% which is needed as a control, showed an increase in the highest compressive strength value in the addition of 30% acrylic binder with the strength obtained of 26 Mpa at the age of 28 days. The lowest water absorption was 4.35% at 28 days, with a porosity of 9.3% and surface absorption of 0.14. These results show that the addition of acrylic binder increases the water tightness of the mortar, demonstrating the potential application of this polymer mortar in improving structural performance.
THE IMPLEMENTATION OF THE OCCUPATIONAL HEALTH AND SAFETY MANAGEMENT SYSTEM AND THE MATURITY LEVEL OF OCCUPATIONAL HEALTH, SAFETY, AND ENVIRONMENT ON PERFORMANCE ACHIEVEMENTS WITH CULTURE TRANSFORMATION AS AN INTERVENING VARIABLE AT PT. PLN (PERSERO) UP Edy Saputra; Kiki Farida Ferine; M. Isa Indrawan
International Journal of Economic, Business, Accounting, Agriculture Management and Sharia Administration (IJEBAS) Vol. 5 No. 4 (2025): August
Publisher : CV. Radja Publika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/ijebas.v5i4.3933

Abstract

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IMPROVING PERFORMANCE THROUGH CULTURAL TRANSFORMATION Edy Saputra; Kiki Farida Ferine; M. Isa Indrawan
International Conference on Health Science, Green Economics, Educational Review and Technology Vol. 7 No. 1 (2025): 9th IHERT (2025): IHERT (2025) FIRST ISSUE: International Conference on Health
Publisher : Universitas Efarina

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/ihert.v7i1.491

Abstract

This study aims to analyze the effect of Implementation of Occupational Health and Safety Management System (OHSMS) and Maturity Level of Occupational Health, Safety, and Environment (K3L) on Performance Achievement, with Cultural Transformation as an intervening variable at PT. PLN (Persero) UP3 North Medan. The study involved 130 respondents selected using purposive sampling. Data analysis was conducted using Partial Least Square Structural Equation Modeling (PLS-SEM) to test the validity, reliability, and relationships among the research variables. The results indicate that both OHSMS implementation and K3L Maturity Level have a positive and significant effect on Performance Achievement, both directly and indirectly through Cultural Transformation as a mediator. Furthermore, Cultural Transformation significantly mediates the relationship between OHSMS implementation and K3L Maturity Level on Performance Achievement, thus enhancing the effectiveness of the OHSMS and K3L systems in improving organizational performance. This study provides practical implications for the management of PT. PLN (Persero) UP3 Medan Utara to continue improving OHSMS implementation, developing K3L Maturity Level, and strengthening Cultural Transformation as a strategy to enhance employee performance. The study also contributes theoretically by reinforcing empirical evidence of Cultural Transformation's mediating role in the context of occupational health and safety.
Implikasi Aksiologi Matematika dalam Pendidikan Saputra, Edy; Zulmaulida, Rahmy; Sarah
Jumper: Journal of Educational Multidisciplinary Research Vol 4 No 2 (2025): Jumper: Journal of Educational Multidisciplinary Research
Publisher : LSM Catimore dan Sahabat Jl. Paya Ilang/Pertamina Desa Lemah Burbana, Takengon, Aceh Tengah 24552

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56921/jumper.v4i2.320

Abstract

This research investigates the concept of Mathematical Axiology and its relation to mathematics education. Mathematical Axiology is a branch of mathematical philosophy that deals with the values, ethics, and principles underlying mathematics. This study aims to provide a brief overview of the importance of understanding mathematical axiology in the context of mathematics education. The research method used is a literature study with qualitative analysis of relevant sources. The results of this study reveal that understanding mathematical axiology has significant implications in mathematics education. It helps in promoting mathematical values, such as beauty and relevance, and developing mathematical ethics in problem-solving and decision-making. In addition, this study identifies recent developments in mathematical axiology, including the exploration of mathematical values in everyday life, ethics in algorithm development, and the link between mathematical axiology and student character development. The conclusion of this study is that mathematical axiology is an important aspect of mathematics education that can help create a generation that thinks critically, ethically, and understands mathematical values in a variety of contexts. The results of this study can provide guidance for mathematics educators, researchers, and policymakers in developing more holistic and relevant educational approaches to mathematics teaching.
Factors Influencing the Level of Job Satisfaction of Lecturers at Universities in Providing Services and Improving Student Numeracy Suwarni; Saputra, Edy; Sarmento, Amândio de Araújo; Tukiyo
Jurnal Penelitian dan Pengembangan Pendidikan Vol. 9 No. 2 (2025): July
Publisher : LPPM Undiksha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jppp.v9i2.91804

Abstract

Factors influencing lecturers' job satisfaction in higher education, focusing on teaching practices and improving students' numeracy skills, have declined. The urgency of this research is critical, considering the challenges lecturers face in the 21st-century education era. This study aims to explore the relationship between self-efficacy, collaboration, stress, and lecturer job satisfaction. The method used in this study is a quantitative survey type with a population of active lecturers and students in Bengkulu, Indonesia, consisting of 980 respondents, including 160 lecturers and 820 students. Data was collected through a questionnaire designed to measure various variables related to teaching practices. Data analysis techniques include structural equation modeling analysis to identify relationships between variables. The study results indicate that self-efficacy and collaboration have a positive relationship with lecturer job satisfaction, while stress negatively impacts job satisfaction. The conclusion of this study emphasizes the need to create a collaborative work environment to support lecturer well-being, which will improve the quality of teaching and student learning experiences. Implications of this research include collaboration and support for lecturers to improve job satisfaction in higher education. The research implies that increasing lecturer job satisfaction contributes significantly to the quality of academic services and teaching effectiveness, especially in strengthening students' numeracy skills.
Pembuatan Biodiesel Dari Minyak Biji Kapuk (Ceiba Pentandra) Dengan Katalis Lempung Teraktivasi; Pengaruh Kecepatan Pengadukan Putri, Erlisa Yanuari; Bahri, Syaiful; Saputra, Edy
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Biodiesel producted by transesterifiation reaction which on energy source. Biodiesel was developed in Indonesia as an anticipatis of energy crisis problem suppported by goverment national energy policy. This research is aimed to make biodiesel from cotton seed oil, studying the effect of agitation speed to the amount of biodiesel produced and determined the best catalyst activated by acid or base, and determined the characteristics of biodiesel produced. The transesterification process was occured at a temperature of 60oC, on weight of oil 100 grams, reaction time 1,5 hours, mole ratio of oil to methanol 1 : 9, catalyst concentration 0,5% -weight of oil for varions of agitation rate 400, 500 and 600 rpm, and variations of catalyst acid 0,47, 0,62 and 0,78% and alkaline activated with a concentration of 0,33, 0,44 and 0,66%. From the result was obtained the highest biodiesel yield of 95,45% for alkaline activated 0,66% for agitation speed of 400 rpm. Characterization of physical properties of biodiesel obtained here density of 878 kg/m3, 3,03 mm2/s kinematic viscosity, acid number 0.34 mg KOH/g sample, and the flash point 195oC.Keywords: biodiesel, clay catalysts, activation of acids and bases, transesterification
Pengolahan Limbah Cair Sawit Dengan Metode Aop (Advanced Oxidation Process) Menggunakan Katalis LaMnO3 Perovskite Dengan Variasi Oksidan Peroxymonosulfate Hasrul, Hasrul; Saputra, Edy; Khairat, Khairat
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Processing of palm oil into Crude Palm Oil (CPO) will produce a large amount of liquid waste. To produce a ton of crude palm oil (CPO) produced 6 m3 of palm oil mill effluent. In this study, a process for removing organic compounds in wastewater using the advanced oxidation process by combining peroxymonosulfate (2KHS5.KHSO4.K2SO4) and a catalyst of LaMnO3 Perovskite. The combination will produce sulfate free radicals that capable degrading harmful organic compounds in effluent effectively. Nanocrystalline LaMnO3 was obtained by calcination at a temperature of 800 °C for 2 hours with an average crystal diameter of the highest peak of 17 μm in the shape of the Rhombohedral catalyst and the catalyst has qualified the catalyst with a nanoparticle structure. Several variations of oxidation process variables were performed to assess their effect on organic matter decline. Some fixed variables were oxidation reaction temperature 30 oC, reaction time 120 min, stirring speed 400 rpm, and concentration of peroxymonosulfate solution 2 g/L and catalyst concentration 0,4 g / L. Conclution of this research is efficiency of 63.54 % for decreasing COD and efficiency by 27,4% for TOC reduction. This proved that the LaMnO3 catalyst is capable of activating peroxymonosulfate.Keywords : AOP, LaMnO3 Perovskite, Oxidation, Peroxymonosulfate
Co-Authors Ahmad Fadli Ahmad Zaki Andes Sagita Bahri, Saiful bettri yustinaningrum, bettri Charismayani Charismayani Desly Fadilla Simbolon Edward Hs Ega Gradini Eka Putri Sriandriani Ekadian Lestari Simatupang Ekky Wahyudi Enang Vovilya Erlisa Yanuari Putri Evelyn Evelyn Fitry Rahmah Gusti Ayu Nurjanah Hafizah Harnedi, Joni Hasrul Hasrul, Hasrul Imanuel Tumanggor Ismeddyanto, Ismeddiyanto Jhon Armedi Pinem Jhon Armedi Pinem Kartika Pratama Syafitri Khairat, Khairat Kiki Farida Ferine Komalasari Komalasari Lita Darmayanti Lora Mona Tambunan M. Isa Indrawan Magfirah Marlina Marlina Maulizar, Hera Miguel Felix Wijaya Monita Olivia Muhdarina Muhdarina Nani Agustina Nazily Haryati Noviani, Julia Nurhayati Nurhayati Nurlis Nurlis Nurul Hikmah Putri, Erlisa Yanuari Riandy, M Arief Rianti Ratna Dewi Rio Akbar Rio Saputra Saiful Bahri Saputra, Rio Sarah Sarmento, Amândio de Araújo Sihotang, Fernando Sitanggang, Ronal Rius Sri Ulina Beru Ginting Sutrisno, Sutrisno Suwarni Syafi’i, Abdullah SYAIFUL BAHRI Syamsu Herman Syarfi Syarfi Syelvia Putri Utami Tresia Monika Natalia Sinaga Trisuciati Syahwardini Tukiyo Tumanggor, Imanuel Utama, Panca Setia Utami, Rizka Wahyudi, Ekky Wahyuni Zumara Wali Ara Yelmida Azis Zuchra Helwani Zuchra Helwani, Zuchra Zultiniar Zultiniar Zultiniar, Zultiniar