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All Journal Jurnal Ilmu Lingkungan Komunikasi Fisika Indonesia Bulletin of Electrical Engineering and Informatics Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam SEMIRATA 2015 Journal of Aquatropica Asia Journal of Aceh Physics Society JOURNAL ONLINE OF PHYSICS ORBITA: Jurnal Pendidikan dan Ilmu Fisika WAJAH HUKUM Jurnal Ilmu Fisika INSIST (International Series on Interdisciplinary Research) Jurnal Penyuluhan Perikanan dan Kelautan APTEK Unri Conference Series: Community Engagement Mejuajua Jembatan Hukum: Kajian Ilmu Hukum, Sosial dan Administrasi Negara Tepak Sirih : Jurnal Pengabdian Kepada Masyarakat Madani Jurnal Pendidikan dan Kewarganegara Indonesia (jupenkei) Jurnal Bakti UPPR
Juandi Juandi
Universitas Riau
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Neuroscience Nursing Physics Public Health Social Sciences Other

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SINTESIS DAN KARAKTERISASI NANOPARTIKEL OKSIDA BESI MENGGUNAKAN METODE BALL MILLING DAN KOPRESIPITASI Riduan Alvinsen Sirait; Salomo Salomo; Juandi Muhammad; Erman Taer
Komunikasi Fisika Indonesia Vol 19, No 2 (2022)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.19.2.91-98

Abstract

This Research has carried out on natural sand originating from the Rokan river, Riau Province by converting it into magnetic iron oxide nanoparticles to determine changes in magnetic properties and particle size. Natural sand samples of the Rokan river were separated between magnetic and non-magnetic particles using an iron sand separator (ISS). ISS products are further synthesized using ball milling and coprecipitation methods. 70-hour ball milling products, coprecipitation without ball milling and coprecipitation with 70-hour ball milling are then given NdFeB (neodymium iron boron) magnets to clean impurities containing non-magnetic elements. The results of this study showed that the highest magnetic acceptability value was obtained in coprecipitation products with ball milling, which was 12.9 × 10-2. This is because coprecipitation products have an abundant content of chemicals in the form of magnetic elements. Based on the results of chemical composition testing using X-ray flourescence (XRF) it was found that in coprecipitation products with ball milling there was 64.504% iron (Fe) content, while 70-hour ball milling products and coprecipitation without ball milling the percentage of Fe protection was 15.023% and 54.152%, respectively. Based on the results of the identification of the chemical composition in the sample, coprecipitation products with 70-hour ball milling have high magnetic induction values and magnetic suseptibility caused by the magnetic content in products such as Fe which are very high and non-magnetic content is very low such as Si compared to 70-hour ball milling products and coprecipitation products without ball milling.
APLIKASI UJI COBA SKALA LABORATORIUM IMPLEMENTASI PROTOTYPE ALAT INOVASI TEKNOLOGI PASCA PANEN BERBASIS BIOMASSA UNTUK DETEKSI TEMPERATURE DENGAN SISTEM INTERNET OF THINGS Melyna Handayani; Juandi Muhammad
Komunikasi Fisika Indonesia Vol 19, No 2 (2022)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.19.2.69-74

Abstract

Digital technology in the form of a drying oven is used for the drying process of a sample biomass fuel. There are 2 types of biomass used, namely Coconut Shell and Acacia tree branches. The biomass is used as fuel for the drying process in the drying oven. This study aims to analyze a change in temperature, humidity and heat with various mass variations in coconut shells and acacia tree branches. Mass variations used are 1000 gr, 1500 gr, 2000 gr, 2500 gr, and 3500 gr. The research process begins by burning biomass from the first mass variation to the last mass variation. Furthermore, in the process of burning biomass, the resulting data is accessed via the internet of things seen from a website. The results of the data have a time span of 5 minutes for each observation of temperature and humidity. The data results are the comparison of time with internal temperature on coconut shells with the highest temperature of 93.7°C with a long burning time of 440 minutes, while on wood twigs the highest temperature is 93.7°C and the time required for the combustion process is 445 minutes. The best heat produced in coconut shell of 3500 gr with a maximum heat of 377.43 Joules at an internal temperature of 61.8°C for 45 minutes. Acacia tree branches have the best calorific value with a mass of 1000 gr, it’s maximum heat of 288.82 Joules at 37.7°C for 10 minutes.
Pengembangan mini pabrik Gaplek menggunakan energi limbah Biomassa dengan Sistim Blower di Desa Tarai Kecamatan Tambang Kabupaten Kampar Provinsi Riau Juandi Muhammad; Usman Malik; Krisman Krisman
Unri Conference Series: Community Engagement Vol 4 (2022): Seminar Nasional Pemberdayaan Masyarakat
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/unricsce.4.8-16

Abstract

The Covid-19 pandemic has had a tremendous impact on various sectors of human life. The government has made various rules and policies in dealing with pandemics and the impacts they cause but are more top-down and common which often do not touch on substantive things in accordance with real conditions in the local community. On the contrary, local communities that better understand their environmental situation and conditions are often not involved in determining the rules and policies in addressing this pandemic. Kampung Tangguh as an effort by the community to survive during a pandemic is a form of local wisdom-based community involvement in the community itself in helping the government overcome the Covid-19 pandemic and the impact it causes. Using a qualitative approach through field reviews, interviews, and documentation studies, this paper illustrates the form of community participation in addressing the Covid-19 pandemic. From the results of this study, it is seen that people at the village level or the neighborhood where they live can actively participate together in overcoming the spread and impact of Covid-19.
Implication Extradisi, Mutual Legal Assistance (UNODC) Dikaitkan Teori Pidana, Perjanjian Internasional Rahmiati Rahmiati; Rahmad Sujud Hidayat; Mohamad Safrin; Juandi Juandi
Wajah Hukum Vol 7, No 1 (2023): April
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/wjh.v7i1.1192

Abstract

Extradition agreements based on the international resolution A/RES/45/166 68th Plenary meeting on 14 December 1990 in conjunction with A/RES/52/88 70th Plenary meeting on December 12, 1997 for making extradition treaties and mutual legal assistance internationally.This  propose the problem identification as follows: 1. What are the important articles suggested in the extradition treaty and mutual legal assistance related to criminal theory and international treaties. 2. How is the application and implementation of the extradition and mutual legal assistance based on the national and regional especially In Indonesia.This research conducted is analytical descriptive. Here is the research results, as follows: 1.) Important articles suggested in the extradition treaty are the principle of nebis in idem, the principle of multiple crimes and the diplomatic principle and the mutual legal assistance is the principle of agreement, the principle of reciprocity, the principle of equality of crimes, the principle of territoriality and the principle of surrendering the perpetrators of political crimes. 2) The implementation of extradition treaty model and the mutual legal assistance from the national and regional legal aspects. Based on the regional aspect, Indonesia is the most active country in realizing a cooperation within an agreement.
PEMANFAATAN LIMBAH BIOMASSA TEMPURUNG KELAPA UNTUK ALAT TEKNOLOGI PENGERING PAKAIAN BERBASIS ARDUINO UNO Mutia Febri Irdayanti; Krisman Krisman; Juandi Muhammad; Annisa Alqorina
Komunikasi Fisika Indonesia Vol 20, No 1 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.1.97-102

Abstract

Research on the utilization of coconut shell biomass waste for clothes dryer technology based on Arduino Uno has been carried out using the experimental method. This Arduino Uno-based dryer technology uses biomass energy from coconut shells with a mass of 2,000 grams for thin clothes and 4,000 grams for thick clothes. Observations were made based on the amount of coconut shell mass and the type of clothing used at 10 minute intervals. The results for a mass of 2,000 grams of coconut shell reached the highest temperature value with an average source temperature of 61.32°C, an average temperature in the drying chamber of 54.53°C with a minimum humidity of 19.5%, while the results for a mass of 4,000 grams coconut shell reached the highest temperature value with an average source temperature of 100.46°C, an average temperature in the drying chamber of 94.62°C with a minimum humidity of 21.1%.
ANALISIS PENURUNAN KADAR AIR GAPLEK MENGGUNAKAN ALAT PENGERING KABINET BERBASIS BIOMASSA TEMPURUNG KELAPA Peri Ridwan Nurhedi; Juandi Muhammad
Komunikasi Fisika Indonesia Vol 20, No 2 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.2.123-126

Abstract

Gaplek is one of the processed cassava products by cutting it into pieces, soaking, and drying it. The drying process for making cassava is necessary because the water content in cassava determines the quality of processed cassava products, one of which is cassava flour. The drying method that can use to dry cassava is to use a cabinet dryer based on coconut shell biomass. In this research, cassava drying was carried out using a cabinet drying machine based on coconut shell biomass. The YL-69 sensor is added to measure moisture content automatically, and then the data read will be calibrated using data from measurements using the MD7822 Grain Moisture Meter sensor. The method used for this research is the experimental method. The coconut shell biomass used was 2500 grams, and the cassava sample used was 500 grams on each drying rack. This study's results indicate a very strong correlation between measuring moisture content using the YL-69 sensor and the Grain Moisture Meter MD7822, which can be seen from the average correlation value of 0.954601. In addition, there was a significant reduction in cassava mass after drying by 44.2%, which indicated that drying with this method could dry cassava optimally.
PENGARUH DOPING CHROMIUM TERHADAP SIFAT MAGNETIK NANOPARTIKEL OKSIDA BESI Indah Tamara Sitorus; Erwin Amiruddin; Juandi Muhammad; Erman Taer
Indonesian Physics Communication Vol 20, No 3 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.3.231-236

Abstract

The purpose of this study is to determine the magnetic properties expressed in the hysteresis loop as well as the morphology of iron oxide nanoparticles from iron sand of Logas Village, natural sand, which were doped with chromium. The separation between magnetic and non-magnetic particles was carried out using the strong magnet neodymium iron boron (NdFeB). Magnetic nanoparticle preparation was carried out by ball milling method for 100 hours which is called BM3. The BM3 product was divided into three parts with the same amount of weight namely  BM3A, BM3B, and BM3C. These products was doped with chromium with concentrations of 0, 10, and 20 (wt%) using ball milling for 20 hours. Magnetic properties were tested using a vibrating sample magnetometer and nanoparticle morphology with a scanning electron microscope (SEM). The magnetic properties of the samples were studied based on loop hysteresis showed that saturation magnetization, remanent magnetization, coercivity, loop squareness, and loop area decreased along with the addition of chromium doping concentration in the sample. The results of the SEM test showed that as the doping concentration was added to the sample the particle size became smaller, namely 1.316, 1.308, and 0.856 μm.
Interpretation of aquifer layers in peatland areas using the Wenner configuration geoelectric method in Rimba Panjang Village, Tambang District, Kampar Regency Firmansyah, Restu; Muhammad, Juandi
Indonesian Physics Communication Vol 21, No 3 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.3.265-270

Abstract

Geoelectric is a geophysical method used to determine the geological conditions of the earth's subsurface based on the variations of rock resistivity value. Interpretation of the aquifer layer is carried out on 2 paths with a length of 300 meters each. The lithology of the study area consists of layers of clay, peat, clay, sand, coarse sandstone, dry gravel, mudstone, limestone, tufan sand to siltstone. According to the data processing results, it shows that the aquifer in Rimba Panjang Village is at a depth ranging from (12.8 – 24.9) meters below ground level with medium groundwater potential. Interpretation using Res2Dinv Software as well as geological maps of the surrounding area informed the subsurface conditions and the presence of groundwater aquifers of the study area. It was found that the resistivity interval of trajectory 1 are (164.341) Ωm, (709 – 1477) Ωm, to (1477 – 3075) Ωm while of trajectory 2 are (864 – 1642) Ωm, (1642 – 3118) Ωm, to (3118 – 5921) Ωm. It can be concluded that the deeper the soil layer, the higher the moisture content. Because the deeper the soil layer, the lower the maturity of the peat, so that the soil is able to hold more water.
Interpretasi Struktur Geologi Bawah Permukaan Dengan Menggunakan Metode Geolistrik Konfigurasi Schulumberger Studi Kasus di Kampus UNRI Krisman; Zulfa; Muhammad, Juandi
Aptek Jurnal Apliksai Teknologi (APTEK): Volume 17, No. 01, Desember 2024
Publisher : Fakultas Teknik Universitas Pasir Pengaraian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30606/aptek.v17i1.3007

Abstract

Melalui metode geolistrik ini, karakteristik dan kedalaman aquifer yang terkandung dalam lapisan tanah dapat diidentifikasi dengan lebih akurat. Dalam konteks ini, penelitian ini bertujuan untuk mengkaji kondisi air bawah tanah di Kampus UNRI, tepatnya depan laboratorium Fisika Bumi, dengan menggunakan metode geolistrik untuk mengetahui struktur geologi bawah permukaan yang berpotensi sebagai sumber air bersih. Hasil dari penelitian ini diharapkan dapat memberikan model pengelolaan berwawasan lingkungan yang dapat meningkatkan pemanfaatan air bawah tanah untuk pemenuhan kebutuhan air di Kampus FMIPA UNRI, dari penelitian ini sangat penting, baik dalam bidang ilmu geofisika maupun dalam ilmu lingkungan, khususnya yang berkaitan dengan keberlanjutan sumber daya air bawah tanah. Selain itu, penelitian ini juga relevan dengan pengembangan IPTEK dalam rangka konservasi air bawah tanah, serta mendukung kebijakan pemerintah dalam mencapai tujuan keberlanjutan pembangunan yang melibatkan aspek sosial, ekonomi, dan lingkungan. Setelah dilakukan penelitian menggunakan metode geolistrik konfigurasi elektroda Schlumberger di areal study didapatkan kesimpulan, yaitu hasil pengolahan data geolistrik bahwa akuifer bebas berada pada kedalaman 19 metee sampai 25 meter dengan nilai resistivitas 62,7 Ωm sampai 88,3 Ωm. Di daerah studi dapat dikatakan bahwa di daerah studi teridentifkasi terdapat 13 lapisan
PKM Improving the Quality and Quantity of Environmentally Friendly Smoked Fish Processing in Air Dingin Village, Bukit Raya District, Pekanbaru City Muhammad, Juandi; Gimin; Hasibuan, Saberina
Mejuajua: Jurnal Pengabdian pada Masyarakat Vol. 4 No. 2 (2024): Desember 2024
Publisher : Yayasan Penelitian dan Inovasi Sumatera (YPIS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52622/mejuajuajabdimas.v4i2.200

Abstract

Through the Community Partnership Program (PKM), an activity can be carried out to improve the quality and quantity of smoked fish production in the MINA SALAI KUARAN business group in Air Dingin Village, Bukit Raya District, Pekanbaru, Riau to become an independent coaching group through two aspects: Increasing the level of empowerment of partners in the production aspect. Still lacking, because it uses traditional methods so that the target of this activity will result in a 50% increase in production quantity. And increasing the level of empowerment of partners in the social community aspect, this is done by using online marketing and SME information via Twitter and Facebook. Meanwhile, the lecture and discussion methods for participants are carried out directly in the field by presenting direct counseling materials that also involve students in the MBKM program, then conducting a demonstration method at the Partner's place of business. The innovation of biomass energy-based Salai fish processing technology that is made uses biomass waste raw materials from tree trunks, especially rambutan trees. The PKM activity of the MINA SALAI KUARAN business group, Making Salai Fish in Air Dingin Village, Bukit Raya District, Pekanbaru, Riau, is an application of technology with the hope of providing solutions to the obstacles faced by this MITRA, including: (1) making improvements to the management of the application of technological innovations in processing aspects of production and (2) improvements in the social aspect of society through the application of an online marketing information system and promotional media through Twitter, Facebook and MITRA's business signs, which are shown by the support and willingness to work together as partners with the community service team from the Physics Department, FMIPA, University of Riau.
Co-Authors Adrianto Ahmad Afriyunita, Dini Alifia Putri Yasmin Amiruddin, Erwin Anhar Anhar Annisa Alqorina Antonius Surbakti Ardiansyah Kurniawan Arifudin Asih Apri Manelsa Awaludin Rakhmat Ayu Permatasari Ayu Permatasari Budijono, Budijono Citra Siti Fatimah Julianti Dani Ali, Nurhalim Defrianto Defrianto Devi Arvianti Dewi Kurnia Dewi Kurnia Dewi Muliana Dodi Irwan Siregar Edisar Edisar Ekwarso , Hendro Erman Taer Erwin ' Erwin Amiruddin Fanrico Sanjaya Tambunan Fia Firdahlia Firmansyah, Restu Gimin Gimin Gimin Hamdi, Muhammad Herman Herman Indah Tamara Sitorus Indra Gunawan Ira Triswiyana Ira Triswiyana Irvan Rahmat Ismawan Ismawan Jasmareni Sri Kurniati Baalijas Krisman Krisman ' Krisman Krisman Kurniawan, Joko Liana Zamri Listia Damayana Lysbetti Marpaung, Noveri M .Edizar ' M Ridwan Haekal Mandasari Sibarani , Oktavia Martin ' Melki Leonardo Melyna Handayani Mhd Edisar Mohamad Safrin Muh Sarkowi Muhammad Edisar Muhammad Hamdi Muhammad Hamdi Muhammmad Hamdi Muhd Fachrewa Almarsya Mutia Febri Irdayanti Nasib ' Nur Islami Peri Ridwan Nurhedi Purwoko, Agus Putra Ramadani Rahmad Sujud Hidayat Rahmi Dewi Rahmi Saputri Rahmiati Rahmiati Rahmondia Nanda Setiadi Ray Afriando Riad Syech Riduan Alvinsen Sirait Rigia Givanny Pritamara Risanto, Joko Riski Febriani Rizki Fadilah Rofeah ' Rosma, Iswadi Hasyim Ruzi Andriani Saberina Hasibuan Saktioto Saktioto Salomo Salomo Sari Agriona Setiawati Setiawati Silaban, Intan Silvia Noviana Sinuraya, Salomo Sugianto ' Sutan Saladin Suwondo Suwondo Syahril Syahril SYAIFUL BAHRI Syamsulduha ' Syamsulduha Syamsulduha Taufik Arianto Tengku Emrinaldi Tiana Rahmadani Usman Malik Usman Malik Yugo Setiawan Yusni Ikhwan Siregar Zainudin Hasan Zulfa Zulfa Zulfa