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All Journal Jurnal Ilmu Lingkungan Jurnal Ilmu Lingkungan Komunikasi Fisika Indonesia 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 Jurnal Pendidikan dan Kewarganegara Indonesia (jupenkei) Jurnal Bakti UPPR

Juandi Juandi

Universitas Riau

Author-ID : 2979896

Religion Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology 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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SEBARAN DAN PRODUKSI KELOMPOK PEMBUDIDAYA IKAN AIR TAWAR DI KECAMATAN MUNTOK, BANGKA BARAT Ira Triswiyana; Ayu Permatasari; Juandi Juandi
Journal of Aquatropica Asia Vol 5 No 1 (2020): Journal of Aquatropica Asia
Publisher : Jurusan Akuakultur, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/aquatropica.v5i1.1824

Freshwater fish farming in West Bangka Regency is developing to meet the needs of the local market. Information about the distribution and production of fish farmers groups (Pokdakan) can be used as a basis for planning sustainable development. This research was conducted using a survey method in July - September 2019 in Muntok District, West Bangka Regency. Fifteen Pokdakan scattered in seven villages with the majority developing catfish commodities. There is only one group that belongs to the middle class, while the other group is still in the beginner class. Freshwater fish productivity reaches 3.2 tons per quarter. The majority of Pokdakan utilize former tin mines with step-in-net cage for fish farming so that their productivity is affected by the season. Continuity of production is needed so that the class of Pokdakan can increase.

PENCITRAAN PEMETAAN PANAS PENYERAPAN RADIASI TERAHERTZ (THz) DALAM JARINGAN BIOLOGIS MENGGUNAKAN MODEL SIMULINK-MATLAB Dewi Kurnia; Muhammmad Hamdi; Juandi M
ORBITA: Jurnal Kajian, Inovasi dan Aplikasi Pendidikan Fisika Vol 6, No 2 (2020): November
Publisher : Universitas Muhammadiyah Mataram

ABSTRAKRadiasi THz memiliki sifat yang membuatnya lebih menarik dan efektif dalam bidang teknik pencitraan biomedis. Hal ini dikarenakan radiasi THz tidak mengionisasi dan merusak jaringan. Penelitian ini menggunakan sampel jaringan biologis sapi yaitu jaringan kulit, lemak, tumor dan otot. Tujuan dari penelitian untuk mengetahui suatu jaringan terindikasi abnormal atau normal dengan melihat pemetaan panas yang dihasilkan dari penyerapan radiasi THz dalam jaringan biologis sapi dengan cara pemodelan. Penelitian ini menggunakan teknik komputasi biofisik dengan medel simulink-matlab. Rentang frekuensi radiasi THz yang digunakan 0,1 - 1 THz, daya 50 – 150 mW serta kerapatan daya 5 - 25 mW/mm3. Rasio dan temperatur dari masing-masing jaringan yaitu lemak 0,25 T/25 oC (T = 6,25 oC ), kulit 0,432 T/25oC (10,8 oC), otot 0,675 T/25oC (16,88 oC) dan Tumor 0,9 T/25oC (22,50 oC). Hasil penelitian menunjukkan bahwa Jaringan lemak memiliki produksi panas yang lebih kecil dan temperatur yang lebih rendah dari jaringan kulit dan otot. Hal ini dikarenakan jaringan lemak memiliki kadar air yang tinggi dengan konsentrasi yang lebih encer sehingga radiasi THz lebih banyak terserap dengan energi yang lebih cepat habis sesuai penetrasi jaringan. Kata kunci: terahertz; pemetaan panas; jaringan biologis; simulink-matlab. ABSTRACTTerahertz (THz) radiation has properties that make it more attractive and effective in the field of biomedical imaging techniques. This is because THz radiation does not ionize and damage tissue. This study used a sample of bovine biological tissue, namely skin, fat, tumor and muscle tissue. The aim of this research is to find out whether a tissue is indicated as abnormal or normal by looking at the heat mapping generated from the absorption of THz radiation in the biological tissue of cattle by means of modeling. This study uses biophysical computation techniques with the simulink-matlab method. The range of THz radiation frequency used is 0.1 - 1 THz, power 50 - 150 mW and power density 5 - 25 mW / mm3. The ratio and temperature of each tissue were fat 0.25 T / 25 oC (T = 6.25 oC), skin 0.432 T / 25oC (10.8 oC), muscle 0.675 T / 25oC (16.88 oC) and Tumor 0.9 T / 25oC (22.50 oC). The results showed that fat tissue has less heat production and a lower temperature than skin and muscle tissue. This is because the fat tissue has a high water content with a more dilute concentration so that more THz radiation is absorbed with energy that runs out faster according to tissue penetration. Keywords: terahertz; heat mapping; biological networks; simulink-matlab.

Karakterisasi Pengaruh Suhu Terhadap Parameter Fisis Biji Pinang Hasil Pengeringan Menggunakan Alat Tipe Kabinet Dengan Limbah Tempurung Kelapa Sebagai Sumber Panas Juandi M; M Ridwan Haekal
Jurnal Ilmu Fisika (JIF) Vol 8 No 1 (2016): March 2016
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.8.1.38-44.2016

Telah berhasil dimodifikasi alat pengering tipe cabinet untuk menentukan karakteristik suhu, dan efisiensi waktu pengeringan pada biji pinang muda dan tua dengan menggunakan energi biomassa tempurung kelapa. Pengeringan dilakukan dengan alat pengering tipe kabinet dengan ukuran panjang 130 cm, lebar 90 cm dan tinggi 120 cm. Ruang pengering dibentuk sedemikian rupa yang dilengkapi dengan cerobong, 2 tingkat rak pengering dan 2 buah drum sebagai ruangtempatpembakaran. Dinding ruangan terbuat dari triplek dengan ketebalan 8 mm dan dilapisi plat seng yang dicat warna hitam. Pengeringan dilakukan selama 100 menit dengan interval waktu 10 menit. Karakteristik suhu pada alat pengeringan bertenaga energy biomassa ini menunjukkan bahwa alat telah mampu digunakan untuk mengeringkan biji pinang muda dengan efesiensi 65,75% dan untuk biji tua dengan efesiensi 78,07%.Â Nilai suhu di rak 1 terhadap waktu pengeringan biji pinang menunjukkan nilai minimum pada waktu t = 0 dengan suhu di rak pada posisi 1, 2, dan 3 nilainya 30oC, 30oC, dan 30oC. Pembakaran biomassa pada menit 30 sampai 100 terus naik dengan nilai suhu akhir 80,83oC. Karakteristik naiknya suhu akan berlanjut sampai bara dari tempurung kelapa telah terbakar sempurna artinya semua bara dari tempurung kelapa telah terbakar. Analisa perbedaan suhu di rak 1, rak 2 dan suhu lingkungan yang di catat dari suhu pada masing-masing termometer pada setiap posisi menunjukkan suhu di rak 2 lebih tinggi nilainya dibandingkan di rak 1.

2D Groundwater Depth for Analysis of The Zone Unconfined Aquifer M Juandi; Muh Sarkowi
INSIST Vol 1, No 1 (2016)
Publisher : Universitas Lampung

Abstract—Changes in land use have occurred quite significant in the city of Pekanbaru. The increasing of building spaces, the decreasing of plantations and forests are continues to grow with the increasing of population and industries. This means, it can cause impact on groundwater resources. This condition shall continue in effect, along with the population and industrial growth. This means, it can cause impact on groundwater resources of Pekanbaru City, thus the analysis of groundwater zone of Pekanbaru city is needed. The data used in this research is related with the biophysical and social economic. Data analysis method was using numeric simulation programming using finite difference method. The results showed that in 2016, its depth ranges between 16-46 m, this indicates that the unconfined aquifer was in trapped position but not included to the confined aquifer system. In 2017, it was predicted that the depth is about 6-38 m, and in 2018 the depth of unconfined aquifer will go deeper to 31,4-34 m. This is influenced by the changes of population and industrial and the automation of extraction of groundwater by those population and industrial is getting bigger. While in 2019 and 2020, the depth of the unconfined aquifer will be between 41,8-44,4 m and 44-46,8 m. It was predicted that the growth of population and industries will grow rapidly in the future. This rapid growth will cause the damage of the aquifer. Keywords—Zone, groundwater, numerical method.

Teknologi pengolahan air gambut menjadi air bersih dengan sistem koagulan dan filtrasi di Desa Buluh Cina, Kecamatan Siak Hulu, Kampar Juandi Juandi M; Usman Malik; Salomo Salomo; Antonius Surbakti
Unri Conference Series: Community Engagement Vol 1 (2019): 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.1.325-332

The abundant peat water in Buluh Cina Village, Siak Hulu Subdistrict, Kampar is a natural potential that can be used for cooking and bathing purposes by processing peat water into clean water that is suitable for consumption. The purpose of this service activity is to treat peat water into clean water. The method used in this service activity is using coagulant and filtration technology. The optimal filtration and coagulant media used for peat water treatment consists of biosand filters with two media namely pumice and quartz sand. The dedication results reduce turbidity and color of peat water and reduce organic content, so that peat water is processed into clean drinking water. The lowest pH value before filtering is equal to 5.93 and the highest pH is found before filtering which is 6.23. This means that before filtering peat water is weak acidic. The lowest sample results after filtration with a slow sand filter that is equal to 6.42 and the highest pH after filtration of 7.5, which means that water is weakly basic. A good pH limit for water is 6.5 to 8.5 so this service proves that slow sand filters are considered effective enough to optimize water pH. Total dissolved solids (TDS) is one of the parameters for determining water quality, TDS shows the amount of solute solids in water. The result of peat water TDS is that the lowest TDS value before filtration is 46 mg / L and the highest TDS is found before filtering which is 49 mg/L. The lowest sample results after filtration with slow sand filter is 49 mg / L and the highest TDS after filtering is 83 mg/L.

Pemberdayaan kelompok masyarakat Kecamatan Tampan Kota Pekanbaru dalam program inovasi teknologi pengering berbasis biomassa yang ramah lingkungan untuk meningkatan kualitas dan kuantitas produk makanan berbahan baku ubi Juandi Muhammad; Herman Herman; Gimin Gimin; Joko Risanto; Syahril Syahril
Unri Conference Series: Community Engagement Vol 2 (2020): 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.2.541-549

The potential of the agricultural sector in terms of cassava in Tampan District, Pekanbaru City with a total potential of 11,210 tonnes of cassava (based on BPS data, 2019). This enormous potential has led to the growth of SMEs for community groups to take advantage of these opportunities in the business of producing cassava-based food processing. Furthermore, this potential is an opportunity for local governments to create a market or regional superior product as well as an attraction for citizens from outside the region to come to Tampan District because it can form an agro-industry in the field of cassava chips. The attraction for visitors to stop by at Tampan District is also supported by geographical aspects, transportation that is easily accessible to everyone. Through this community service activity, the fostered village scheme is very appropriate to be applied in Tampan District because it can guide UKM groups so that at the end of the service activities of this guided village scheme will form superior regional products that are competitive through the application of environmentally friendly biomass energy-based drying technology, and the application of IT-based management system so that at the end of the activity it will produce an Agro-Industry target village with regional superior products that are competitive.

Teknologi mesin pengering pakaian berbasis limbah tempurung kelapa untuk meningkatkan ekonomi bagi UKM yang bergerak dalam bidang laundry di Kecamatan Tampan Kota Pekanbaru Antonius Surbakti; Juandi Muhammad; Erman Taer; Ramondia Setiadi; Usman Malik
Unri Conference Series: Community Engagement Vol 2 (2020): 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.2.550-558

The potential of the laundry sector, the entrepreneur community / UKM Laundry in Tampan District, which has very potential business potential. This clearly saves the huge potential of the Laundry / UKM business sector. The clothes drying system, which is carried out through the traditional drying method, has long been practised by Laundry UKM entrepreneurs. In particular, the clothes drying activity has long been a source of livelihood for the Laundry UKM community in Panam District. However, in general, the process of drying clothes through a drying method that relies solely on sunlight is not optimal. The process of drying clothes by laundry entrepreneurs in the Tampan District is still done traditionally, namely drying in the sun. This process takes a long time, it takes 2 to 4 days to dry clothes and it also depends on the presence of sunlight. The drying machine is designed to utilize heat from burning coconut shell waste which functions as a heat collector. So that the drying process can take place quickly, at any time and without depending on the sun. Control of the drying temperature is done by opening and closing the air ducts in the dryer. This dryer consists of a solar collector, biomass burning furnace, and drying room (box). The drying room functions as a place for clothes to be dried. The flow of heat from burning coconut shell waste to the drying chamber. The result of drying clothes is better than traditional drying. The drying technology based on coconut shell waste to dry clothes will be applied in the Laundry UKM community in Tampan District, Pekanbaru which is the livelihood of some UKM in Tampan District, Pekanbaru City

Teknologi Mini Pabrik Gaplek Menggunakan Kontrol Jarak Jauh Mendukung New Normal Covid 19 di Kecamatan Tambang Kabupaten Kampar Provinsi Riau Juandi M; Syahril Syahril; Gimin Gimin
Unri Conference Series: Community Engagement Vol 3 (2021): 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.3.1-10

The potential of agro-industry made from agricultural products, in this case cassava, in Tambang District, Kampar Regency is very much evidenced by the emergence of SMEs engaged in agro-industry. This enormous potential has led to the growth of SMEs for community groups to take advantage of these opportunities in the Gaplek production business. Furthermore, this potential is an opportunity for the growth of Business Groups in the area. The Gaplek Maju Bersama Business Group consists of 20 farmers. This Gaplek business can increase the income of farmers, because cassava if sold in the market costs only Rp. 350 per kg, whereas if it is in the form of Gaplek it can reach a price of Rp. 2000/Kg. The current condition of Gaplek production is very little because there is no technology for making Gaplek, so that production only reaches 300 kg to 400 kg per day, this too depends on the weather. The purpose of this activity is to create a mini factory for making Gaplek with a production capacity of 1 ton/day by applying long-distance system technology based on biomass energy, which is very well applied in the new normal conditions of Covid 19. The method used in this activity is to design industrial control system technology. The long distance applied in the manufacture of the Gaplek mini factory will reduce contact time between workers, this is in accordance with new normal conditions. The results obtained from this activity are in the form of technological tools for the manufacture of mini cassava factories that have been implemented in Maju Bersama UKM in Tambang District, Kampar Regency, Riau Province, and have been proven to increase the efficiency of drying time only takes 3 to 5 hours depending on the size of the raw material. cassava to be dried.

PEMETAAN POTENSI SUMBER DAYA AIR BAWAH TANAH DI KECAMATAN RUMBAI PESISIR DENGAN MENGGUNAKAN METODE GEOLISTRIK ATURAN SCHLUMBERGER Putra Ramadani; Juandi M; Usman Malik
Aptek Jurnal Apliksai Teknologi (APTEK): Volume 12, No. 01, Januari 2020
Publisher : Fakultas Teknik Universitas Pasir Pengaraian

Penelitian tentang pemetaan potensi sumber daya air bawah tanah dengan menggunakan metode geolistrik konfigurasi Schlumberger di Kecamatan Rumbai Pesisir Kota Pekanbaru. Penelitian ini bertujuan untuk memetakan potensi sumber daya air bawah tanah yang diperoleh berdasarkan hasil interpretasi data pengukuran menggunakan metode resistivitas geolistrik dengan konfigurasi elektroda Schlumberger. Pengukuran dilakukan menggunakan resistivity meter pada lima titik yang terletak di Kecamatan Rumbai Pesisir Kota Pekanbaru, data resistivitas relatif yang diperoleh dari pengukuran diolah menggunakan software progress. Berdasarkan hasil pengolahan data, dimungkinkan untuk menafsirkan deskripsi dalam hal kedalaman, jumlah lapisan, dan nilai resistivitasnya. Hasil interpretasi menggunakan metode geolistrik dengan data konfigurasi Schlumberger di Kecamatan Rumbai Pesisir Kota Pekanbaru bervariasi dalam resistivitas dan kedalaman, yang berkisar antara 39,9 Ωm - 7.789 Ωm dan kedalaman 4,76 - 252 m. Kemudian berdasarkan peta kontur sebaran kedalaman air tanah yang diperoleh dari pengolahan data kedalaman dengan menggunakan software surfer, pola aliran air tanah dangkal di Kecamatan Rumbai Pesisir mengalir menuju ke Kelurahan Lembah Damai dengan kedalaman 4,5 - 13,5 m, sedangkan aliran air tanah dalam mengalir menuju ke Kelurahan Meranti Pandak dengan kedalaman 222 - 254 m.

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

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.

Co-Authors Abdullah, Hewa Yaseen Adrianto Ahmad Afriyunita, Dini Alifia Putri Yasmin Amiruddin, Erwin ANDRINI, ROZI Anisa, Hijrah Septia Annisa Alqorina Antonius Surbakti Asih Apri Manelsa Awaludin Rakhmat Ayu Permatasari Budi Azwar Citra Siti Fatimah Julianti Citra, Theodora Defrianto Defrianto Devi Arvianti Dewi Kurnia Dewi Kurnia Dewi Muliana Dodi Irwan Siregar Edisar Edisar Erman Taer Erwin ' Erwin Amiruddin Fanrico Sanjaya Tambunan Febrianti, Ade Fia Firdahlia Firmansyah, Restu Gimin Gimin Gimin HAMDALAH, AHMAD Hamdi, Muhammad Herman Herman Indah Tamara Sitorus Indra Gunawan Ira Triswiyana Irvan Rahmat Ismawan Ismawan Jasmareni Sri Kurniati Baalijas Krisman Krisman ' Krisman Krisman Kurniawan, Joko Lestari, Fitra Liana Zamri Listia Damayana 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 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 Ray Afriando Riad Syech Riduan Alvinsen Sirait Rigia Givanny Pritamara Rika Taslim Risanto, Joko Riska Fitriani Riski Febriani Rizki Fadilah Rofeah ' 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 ' Sulistyo Rini, Ari Sutan Saladin Syahril Syahril Syamsulduha ' Syamsulduha Syamsulduha Taufik Arianto Tiana Rahmadani Usman Malik Usman Malik Usman Usman Yohanes Dwi Saputra, Yohanes Dwi Yugo Setiawan Yupapin, Preecha Zainudin Hasan Zulfa Zulfa Zulfa

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