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All Journal Jurnal Ilmu Lingkungan 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) APTEK Unri Conference Series: Community Engagement Mejuajua Science, Technology, and Communication Journal Jembatan Hukum: Kajian Ilmu Hukum, Sosial dan Administrasi Negara Wahana Fisika : Jurnal Fisika dan Terapannya 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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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.
Pemodelan Distribusi Temperatur Penyerapan Radiasi Terahertz Dalam Jaringan Biologis Sapi Menggunakan Model Simulink-Matlab Dewi Kurnia; Muhammad Hamdi; Juandi M
Wahana Fisika Vol 6, No 1 (2021): June
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/wafi.v6i1.28989

Abstract

Radiasi Terahertz (THz) memiliki sifat yang membuatnya lebih menarik dan efektif dalam bidang teknik pencitraan biomedis. Hal ini dikarenakan radiasi THz memiliki energi foton yang relatif lebih rendah dibandingkan radiasi sinar x sehingga tidak mengionisasi dan merusak jaringan. Radiasi THz juga memiliki rentang frekuensi yang hampir setara dengan frekuensi air yang membuatnya lebih mudah berinteraksi dengan jaringan biologis. Penelitian ini menggunakan sampel jaringan biologis sapi yaitu  jaringan kulit, lemak, tumor dan otot. Tujuan dari penelitian ini adalah melihat pengaruh kerapatan daya radiasi THz terhadap distribusi temperatur sekaligus produksi panas pada jaringan melalui hasil pemodelan. Hal ini ditunjukkan dari perubahan medan elektromagnetik yang disertai dengan transfer panas dari penyerapan radiasi dalam jaringan sapi yang diturunkan dengan persamaan konduksi biopanas. Penelitian ini menggunakan teknik komputasi biofisik dengan medel simulink-matlab dan rentang frekuensi radiasi THz 0,1 - 1 THz, daya 50 – 150 mW dan kerapatan daya 5 - 25 mW/mm3. Pemodelan distribusi temperatur dilakukan dengan dua cara yaitu dengan kerapatan daya yang berbeda dan variasi diameter lingkar sumber radiasi THz. Diakhir penelitian akan dilakukan perbandingan data hasil distribusi temperatur secara eksperimen dan pemodelan sebagai validasi dari keakuratan model yang digunakan. Hasil Penelitian menunjukkan bahwa semakain tinggi kerapatan daya yang digunakan maka energi radiasi yang terserap akan semakin besar dengan temperatur yang semakin meningkat. Hal ini menyebabkan distribusi temperatur pada jaringan biologis akan semakin luas dan produksi panas pada jaringan semakin besar. Hasil analisis pencitraan distribusri temperatur terhadap kedalaman jaringan kulit, lemak, tumor dan otot pada sapi menunjukkan bahwa jaringan lemak memiliki produksi panas yang lebih kecil dibandingkan yang lainnya. Hal ini dikarenakan jaringan lemak memiliki kadar air yang lebih tinggi dengan konsentrasi yang lebih encer sehingga radiasi THz akan mudah diserap diawal penetrasi yang menyebabkan energi radiasi semakin berkurang sesuai dengan penetrasi kedalaman. Perbandingan data hasil eksperimen dan pemodelan menunjukkan bahwa persentase kesalahan adalah 1,09 %.       
Interpretation of subsurface layers using the Wenner configuration geoelectric method and geochemical tests: Case study at Muara Fajar landfill – Rumbai, Pekanbaru Muhammad, Juandi; Citra, Theodora; Rahmalia, Anisa
Science, Technology and Communication Journal Vol. 4 No. 2 (2024): SINTECHCOM Journal (February 2024)
Publisher : Lembaga Studi Pendidikan and Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v4i2.258

Abstract

The need for water daily is a big problem for people living around Muara Fajar landfill – Rumbai, Pekanbaru. This study aims to identify the depth of subsurface structures around the Muara Fajar landfill area using the Wenner configuration dielectric method and determine the water quality in the community wells around the landfill site. The data obtained in the acquisition process are used to calculate the apparent resistivity value at each measurement point and analyzed quantitatively and qualitatively. Then proceed with the inversion process using the progress program so that obtained resistivity value and layer thickness at each point of measurement. The results of measurement in track-1 get a range of resistivity values ranging from 62.9 – 171 ohm-meters and track-2 from 32.4 – 70.6 ohm-meters. Underground water taken is residents' well water in the research area as many as 5 sample points using GPS. This underground water sample will be tested with parameters such as pH, TDS, BOD, COD, NH3, and turbidity. Underground water cannot be consumed from the results of the water quality test with the parameters mentioned at the beginning if referring to the Regulation of the Minister of Health of the Republic of Indonesia because the pH obtained in all underground water samples is < 6.5 or acidic, the value of the BOD, COD, NH3, and turbidity parameters, the values are by the quality standard.
Peatland aquifer zone modeling via Wenner and Schlumberger configuration geoelectric strategies in Tarai Bangun Village, Riau Province, Indonesia Sitinjak, Tumbur Marudut Tua; Muhammad, Juandi; Dewi, Rahmi
Science, Technology and Communication Journal Vol. 4 No. 2 (2024): SINTECHCOM Journal (February 2024)
Publisher : Lembaga Studi Pendidikan and Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v4i2.260

Abstract

The quality of freshwater in peatland areas poses significant concerns for both governmental bodies and local communities. Challenges arise during well drilling activities, where individuals often encounter difficulties in accessing fresh water, either due to its absence or contamination with peat-infused water. Tarai Bangun Village, situated in the Kampar Regency of Riau, represents a critical peatland region warranting thorough investigation, particularly along street of Sarana Utama. Despite lacking social amenities such as markets, the area is equipped with essential facilities like schools and places of worship. This study aims to assess the efficacy of Wenner and Schlumberger configuration modeling in horizontal and vertical soil mapping, thereby facilitating a comprehensive understanding of groundwater distribution and aquifer zoning within the peatland areas under examination. Analysis conducted utilizing Res2DInv software for horizontal modeling revealed significant findings. In track 1, groundwater layers were identified at depths of 6.50 meters and 19 meters, comprising gravel, sandstone, and limestone. Track 2 exhibited an aquifer layer spanning depths from 2.50 meters to 24.9 meters, consisting of alluvium, gravel, and limestone. Furthermore, interpretation of 1D geoelectric vertical model cross-sections using Progress software unveiled additional insights. Path 1 delineated depths of 0.12 meters, 19.30 meters, and beyond 41.28 meters, featuring a lithological composition of sandstone, limestone, and dry gravel. Path 2 showcased depths of 0.14 meters, 9.43 meters, and exceeding 12.02 meters, characterized by dry sand and gravel formations.
Determination of groundwater quality using geochemical methods in densely populated housing in Kubang Jaya Village, Siak Hulu District, Kampar Regency Muhammad, Juandi; Pangesti, Winda
Science, Technology and Communication Journal Vol. 4 No. 3 (2024): SINTECHCOM Journal (June 2024)
Publisher : Lembaga Studi Pendidikan and Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v4i3.263

Abstract

The determination of groundwater quality in dense residential housing in Kubang Jaya Village, Siak Hulu District, Kampar Regency has been carried out using physical and chemical parameters. This study aims to determine the quality of groundwater by taking samples of borehole water. Sampling was carried out at Ginting Housing; the number of samples taken was 17, and the distance between each sampling point was around 200 m. Parameters analyzed to test groundwater quality were turbidity, conductivity, pH, and total dissolved solids (TDS). Based on the results of groundwater quality tests in terms of turbidity level parameters, the average value was 2.0 NTU, conductivity was 191.7 ppm, pH was 4.28, and TDS was 132.4 mg/l. Overall, the results of the water quality test in this research area are unfit for consumption because they are too acidic, but they are still safe and suitable for daily needs.
Co-Authors Abdullah, Hewa Yaseen Adrianto Ahmad Afriyunita, Dini Alifia Putri Yasmin Amiruddin, Erwin ANDRINI, ROZI Anhar Anhar Anisa, Hijrah Septia Annisa Alqorina Antonius Surbakti Arifudin Arifudin arifudin Asih Apri Manelsa Awaludin Rakhmat Ayu Permatasari Budi Azwar Budijono, Budijono Citra Siti Fatimah Julianti Citra, Theodora Dani Ali, Nurhalim Defrianto Defrianto Devi Arvianti Dewi Kurnia Dewi Kurnia Dewi Muliana Dodi Irwan Siregar Edisar Edisar Ekwarso , Hendro Emrinaldi , Tengku Erman Taer Erwin &#039; Erwin Amiruddin Fanrico Sanjaya Tambunan Febrianti, Ade Fia Firdahlia Firmansyah, Restu Gimin Gimin Gimin HAMDALAH, AHMAD Hamdi, Muhammad Hendro Ekwarso Herman Herman Indah Tamara Sitorus Indra Gunawan Ira Triswiyana Irvan Rahmat Ismawan Ismawan Jasmareni Sri Kurniati Baalijas KEMAL KEMAL Krisman Krisman &#039; Krisman Krisman Kurniawan, Joko Lestari, Fitra Liana Zamri Listia Damayana Lysbetti Marpaung, Noveri M .Edizar &#039; M Ridwan Haekal Mandasari Sibarani , Oktavia Martin &#039; 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 &#039; Nur Islami Pangesti, Winda Peri Ridwan Nurhedi Pertiwi, Meryati Purwoko, Agus Putra Ramadani Rahmad Sujud Hidayat Rahmalia, Anisa Rahmi Dewi Rahmi Saputri Rahmiati Rahmiati Rahmondia Nanda Setiadi Rakhmawati Farma Rany, Novita Ray Afriando Riad Syech Riduan Alvinsen Sirait Rigia Givanny Pritamara Rika Taslim Risanto, Joko Riska Fitriani Riski Febriani Rizki Fadilah Rofeah &#039; Rosma, Iswadi Hasyim Ruzi Andriani Saberina Hasibuan Saktioto Saktioto Salomo Salomo Sari Agriona Setiawati Setiawati Sherly Mutiara Silaban, Intan Silvia Noviana Sinuraya, Salomo Sitinjak, Tumbur Marudut Tua Sugianto &#039; Sulistyo Rini, Ari Sutan Saladin Suwondo Suwondo Syah, Erzan Syahril Syahril SYAIFUL BAHRI Syamsulduha &#039; Syamsulduha Syamsulduha Taufik Arianto Tengku Emrinaldi Tiana Rahmadani Usman Malik Usman Malik Usman Usman Yohanes Dwi Saputra, Yohanes Dwi Yugo Setiawan Yupapin, Preecha Yusni Ikhwan Siregar Yusri Yusri Zainudin Hasan Zulfa Zulfa Zulfa