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Sensorless-BLDC motor speed control with ensemble Kalman filter and neural network Rif'an, Muhammad; Yusivar, Feri; Kusumoputro, Benyamin
Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 10, No 1 (2019)
Publisher : Research Centre for Electrical Power and Mechatronics, Indonesian Istitutes of Sciences

The use of sensorless technology at BLDC is mainly to improve operational reliability and play a role for wider use of BLDC motors in the future. This research aims to predict load changes and to improve the accuracy of estimation results of sensorless-BLDC. In this paper, a new filtering algorithm is proposed for sensorless brushless DC motor based on Ensemble Kalman filter (EnKF) and neural network. The proposed EnKF algorithm is used to estimate speed and rotor position, while neural network is used to estimate the disturbance by simulation. The proposed algorithm requires only the terminal voltage and the current of three phases for estimated speed and disturbance. A model of non-linear systems is carried out for simulation. Variations in disturbances such as external mechanical loads are given for testing the performance of the proposed algorithm. The experimental results show that the proposed algorithm has sufficient control with error speed of 3 % in a disturbance of 50 % of the rated-torque. Simulation results show that the speed can be tracked and adjusted accordingly either by disturbances or the presence of disturbances.

Aspect Physiology Plant of Cauliflower (Brassica oleracea var botrytis L.) in the Interval of Nitrogen Fertilization, Dose and Type of Organic Fertilizer in Coastal Sandy Land Supriyanto, Supriyanto; Saparso, Saparso; Rif'an, Muhammad
PLANTA TROPIKA: Jurnal Agrosains (Journal of Agro Science) Vol 8, No 2 (2020)
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.2020.117.75-82

Cauliflower is one of the vegetables that have the ability to adapt to coastal sandy land. Cauliflower production can be increased by extensification efforts using coastal sandy land. The research aimed to determine the type of liquid organic fertilizer, the fertilization interval of liquid organic fertilizer, and the appropriate dose of nitrogen fertilizer for the growth and productivity of cauliflower plant on coastal sandy land. The research was conducted in Jetis sandy beach, Banjarsari Village, Nusawungu Sub-district, Cilacap Regency. The study was conducted from August 2017 to November 2017. The experiment was arranged in a Factorial Randomized Complete Block Design (RCBD). Data were analyzed by F test followed by DMRT 5%. The results showed that (1) type of artificial liquid organic fertilizer gave best result on the dry root weight and chlorophyll b. (2) The 9-day-interval of liquid organic fertilizer application interval gave the best result on the fresh root weight and fresh plant weight, while the 4-day-interval of liquid organic fertilizer application gave the best result on dry flower weight. (3) The doses of N fertilizer significantly affected leaf area, root volume, fresh root weight, fresh leaf weight, dry leaf weight, fresh plant weight, dry plant weight, fresh stem weight, dry stick weight, fresh flower weight, flower weight dry, and flower diameter.

Aspect Physiology Plant of Cauliflower (Brassica oleracea var botrytis L.) in the Interval of Nitrogen Fertilization, Dose and Type of Organic Fertilizer in Coastal Sandy Land Supriyanto, Supriyanto; Saparso, Saparso; Rif'an, Muhammad
PLANTA TROPIKA: Jurnal Agrosains (Journal of Agro Science) Vol 8, No 2 (2020)
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.2020.117.75-82

Cauliflower is one of the vegetables that have the ability to adapt to coastal sandy land. Cauliflower production can be increased by extensification efforts using coastal sandy land. The research aimed to determine the type of liquid organic fertilizer, the fertilization interval of liquid organic fertilizer, and the appropriate dose of nitrogen fertilizer for the growth and productivity of cauliflower plant on coastal sandy land. The research was conducted in Jetis sandy beach, Banjarsari Village, Nusawungu Sub-district, Cilacap Regency. The study was conducted from August 2017 to November 2017. The experiment was arranged in a Factorial Randomized Complete Block Design (RCBD). Data were analyzed by F test followed by DMRT 5%. The results showed that (1) type of artificial liquid organic fertilizer gave best result on the dry root weight and chlorophyll b. (2) The 9-day-interval of liquid organic fertilizer application interval gave the best result on the fresh root weight and fresh plant weight, while the 4-day-interval of liquid organic fertilizer application gave the best result on dry flower weight. (3) The doses of N fertilizer significantly affected leaf area, root volume, fresh root weight, fresh leaf weight, dry leaf weight, fresh plant weight, dry plant weight, fresh stem weight, dry stick weight, fresh flower weight, flower weight dry, and flower diameter.

Usability and usefulness of “smart indetect” for diabetic foot ulcer prevention Taryudi, Taryudi; Lindayani, Linlin; Rif'an, Muhammad
International Journal of Public Health Science (IJPHS) Vol 13, No 3: September 2024
Publisher : Intelektual Pustaka Media Utama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijphs.v13i3.23801

The utilization of the smart detection application has the potential to mitigate the incidence of decubitus ulcer infection. Smart InDetect incorporates artificial intelligence technology and is based on the internet of things and has the ability to detect the likelihood of infection and provide information regarding the proper management of wounds, as well as the care and treatment of infections. The objective of this study is to assess the usability, usefulness, and perceived satisfaction of potential users of the program. The present study employs a quantitative research methodology, utilizing a sample size of 30 participants. The findings of the research on usability and usefulness testing yielded an efficacy rate of 89% and 88.89% respectively, along with an average satisfaction score of 4.14 on a 5-point scale. Users perceive this program as both useful and efficient in its usability, particularly in relation to its ability to detect the risk of infection.

Pengaruh perbedaan nutrisi fosfor dan media tanam terhadap pertumbuhan tanaman melon (Cucumis melo L.,) hidroponik sistem irigasi tetes Rif'an, Muhammad; Widyasunu, Purwandaru; Widarawati, Rosi; Ummami, Nanda Rizkia
Jurnal AGRO Vol 11, No 1 (2024)
Publisher : Jurusan Agroteknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/31140

The growth of melon (Cucumis melo L.,) can be improved by changing the nutrition and using planting media such as cocopeat and zeolite. The aim of this research was to determine the effect of different P nutrition, planting media composition and the interaction of two factors on the growth of melon. The research started from March 2023 to July 2023 at the screen house and agronomy horticulture laboratory of the Faculty of Agriculture, Jenderal Soedirman University. The first factor consisted of five levels of difference in P nutrition: AB-Mix nutrition manufacturer, P difference in the growth phase: flowering: fruit ripening (1.5%: 1.5% : 1.5% ; 1.75% : 2.00% ; 1.75% ; 2.25% : 2.75% : 2.00%, and; 2.75% : 3.5% : 2.5%). The second factor was the type of planting media, which consisted of three levels with a cocopeat:zeolite ratio (100% : 0, 50% : 50%, and 75% : 25%). The research found that the interaction between variations in P nutrition and the composition of the planting medium increased root length and leaf area, but did not affect plant length or chlorophyll content in melon plants. Different P nutrients could increase plant length, root length, leaf area and chlorophyll content in melon plants. Planting media composition was able to increase plant length, root length, and leaf area, but did not affect chlorophyll content of melon plants. These results indicate that differences P nutrition (F2) and planting media composition (P3) can be used in hydroponic melon production to improve melon plant growth. Peningkatan pertumbuhan tanaman melon (Cucumis melo L.,) secara hidroponik dapat dilakukan melalui modifikasi nutrisi unsur hara serta penggunaan media tanam yang tepat seperti cocopeat dan zeolit. Penelitian ini bertujuan untuk mengetahui pengaruh perbedaan nutrisi P, komposisi media tanam serta interaksi perbedaan nutrisi P dan komposisi media tanam terhadap pertumbuhan tanaman melon hidroponik sistem irigasi tetes. Penelitian dilaksanakan Maret 2023 sampai dengan Juli 2023 di screen house dan laboratorium agronomi dan hortikultura Fakultas Pertanian, Universitas Jenderal Soedirman. Penelitian menggunakan Rancangan Acak Kelompok Lengkap (RAKL) dengan dua faktor. Faktor pertama perbedaan nutrisi P terdiri atas lima taraf yaitu: nutrisi AB-Mix pabrikan, perbedaan P pada fase pertumbuhan : pembungaan : pemasakan buah (1,5% : 1,5% : 1,5% ; 1,75% : 2,00% ; 1,75% ; 2,25% : 2,75% : 2,00%, dan ; 2,75% : 3,5% : 2,5%). Faktor kedua jenis media tanam terdiri atas tiga taraf dengan perbandingan media cocopeat : zeolite (100% : 0 ; 50% : 50%, dan ; 75% : 25%). Hasil penelitian menunjukkan bahwa Interaksi antara perbedaan nutrisi P dan komposisi media tanam mampu meningkatkan panjang akar dan luas daun tetapi tidak mampu meningkatkan panjang tanaman dan kadar klorofil tanaman melon. Perbedaan nutrisi P mampu dalam meningkatkan tanaman, panjang akar, luas daun dan kadar klorofil tanaman melon. Komposisi media tanam mampu meningkatkan panjang tanaman, panjang akar dan luas daun tetapi tidak mampu meningkatkan kadar klorofil tanaman melon. Hasil ini menunjukkan perbedaan nutrisi P (F2) dan komposisi media tanam (P3) dapat diaplikasikan pada budidaya melon hidroponik untuk meningkatkan pertumbuhan tanaman melon.

EFEKTIVITAS PERLAKUAN Azolla pinnata DAN SITOKININ DALAM EKSTRAKSI MINYAK KEDELAI ANJASMORO Harti, Adi Oksifa Rahma; Sakhidin, Sakhidin; Rif'an, Muhammad; Agung Dwi Haryanto, Totok; Marina, Ida; Koswara, Engkos
AGROSCIENCE (AGSCI) Vol 14, No 2 (2024): December
Publisher : Fakultas Sains Terapan, Universitas Suryakancana Cianjur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35194/agsci.v14i2.4264

Penelitian ini bertujuan untuk mengevaluasi metode ekstraksi minyak kedelai dari varietas unggul Anjasmoro yang ditanam dengan sistem tanam tumpangsari dan diberi perlakuan azolla serta sitokinin. Metode ekstraksi yang digunakan adalah Soxhletasi dengan pelarut etanol 96%. Proses ekstraksi melibatkan penghalusan kacang kedelai, diikuti dengan penggunaan kolom Soxhlet dan pemanasan menggunakan elektromantel. Pengamatan dilakukan terhadap laju aliran pelarut dan pengembunan selama ekstraksi berlangsung. Hasil ekstraksi kemudian melalui proses destilasi untuk mengukur massa jenisnya, dengan tahap terakhir adalah penguapan minyak hingga pelarutnya habis. Hasil penelitian menunjukkan bahwa ekstraksi minyak kedelai Anjasmoro menghasilkan hasil yang efisien, dengan kadar air yang cocok untuk proses ekstraksi. Rendemen minyak dan yield minyak menunjukkan efisiensi proses ekstraksi yang baik. Varietas Anjasmoro juga menghasilkan ampas basah dan kering, serta endapan putih. Penggunaan azolla dan sitokinin meningkatkan efisiensi produksi dan kualitas minyak. Dengan demikian, metode ekstraksi ini efisien dalam menghasilkan minyak kedelai yang signifikan dan berpotensi meningkatkan hasil pertanian secara berkelanjutan.

PASAR SAYUR DAN IKAN PLAZA BERINGIN DI BUNTOK Rif'an, Muhammad; Oktaviana, Anna
JURNAL TUGAS AKHIR MAHASISWA LANTING Vol 13 No 2 (2024): JTAM LANTING Agustus 2024
Publisher : UNIVERSITAS LAMBUNG MANGKURAT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtamlanting.v13i2.3036

In Indonesia, markets are one of the biggest economic drivers for a region's income, and markets are also where buying and selling transactions take place. There are many necessities that people often buy at the market, including food necessities such as basic necessities, vegetables, fish and other staples. It is very important to pay attention to the related parties of the vegetable and fish market in Buntok City, where many parts of the construction are fragile and damaged, and also the condition of this market is chaotic, where the road for visitor circulation is converted into a parking lot and a place for merchandise, which makes market users uncomfortable because user access is narrow due to lack of arrangement by the related parties. Based on the facts behind the design of the Plaza Beringin vegetable and fish market in Buntok, the question is "How can the design of the Plaza Beringin vegetable and fish market in Buntok be comfortable for its users, namely sellers and buyers?". The Architectural Programming method by William Pena was chosen to solve the problem architecturally because this method places great emphasis on the problems in the design of the Plaza Beringin vegetable and fish market in Buntok. This method produces clarity and efficiency in the problem-solving process in design. The design concept used is passive design. Passive design is generally defined as reducing energy use applied through architectural design while still maximizing user comfort.

Generative artificial intelligence as an evaluator and feedback tool in distance learning: a case study on law implementation Nurdiana, Dian; Maulana, Muhamad Riyan; Hasanah, Siti Hadijah; Chairunnisa, Madiha Dzakiyyah; Komuna, Avelyn Pingkan; Rif'an, Muhammad
IAES International Journal of Artificial Intelligence (IJ-AI) Vol 14, No 3: June 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijai.v14.i3.pp2490-2505

The development of generative artificial intelligence (GAI) has impacted various fields, including higher education. This research examines the use of GAI as an evaluator and feedback provider in distance legal education. This study tested five GAI models: ChatGPT, Perplexity, Gemini, Bing, and You, using a sample of 20 students and evaluations from legal experts. Descriptive statistical analysis and non-parametric tests, including Wilcoxon, intraclass correlation coefficient (ICC), Kappa, and Kendall's W, were used to assess accuracy, feedback quality, and usability. The results showed that ChatGPT was the most effective GAI, with the highest mean scores of 4.22 from experts and 4.12 from students, followed by Gemini with scores of 4.15 and 4.07. In terms of binary judgement accuracy, Gemini scored 80%, ChatGPT 60%, while Perplexity, Bing, and You had lower scores. Statistical analysis showed moderate agreement (ICC=0.439) and low alignment (Kappa=-0.058) between the GAIs and expert evaluations, with a Kendall's W value of 0.576 indicating moderate consistency in judgements. These findings emphasize the importance of selecting effective GAIs such as ChatGPT and Gemini to improve academic evaluation and learning in legal education, and pave the way for further innovations in the use of AI.

Stigmatisasi Perilaku Menyimpang Seksual LGBT di Kota Padang Andira, Laras; Yuliana, Mela; Citra, Kiki Amalia; Rif'an, Muhammad; Fadilla Saputri; Delmira Syafrini
Social Empirical Vol. 2 No. 1 (2025): Social Empirical: Prosiding Berkala Ilmu Sosial
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/scemp.v2i1.81

Penelitian ini bertujuan untuk mendeskripsikan tanggapan masyarakat disekitar Jalan Patenggangan dan Jalan Srigunting tentang stigma LGBT, artikel ini juga dapat mengurangi stigma dan diskriminasi yang sering muncul akibat kurangnya pemahaman nilai dan norma. Penelitian ini menarik untuk dilakukan karena mengungkap dampak stigma terhadap kesehatan mental, hak asasi, serta kesetaraan sosial. Penelitian menggunakan pendekatan kualitatif dengan tipe studi kasus. Teknik pengumpulan data menggunakan observasi, wawancara, dan studi dokumentasi. Observasi dilakukan untuk mengamati perilaku masyarakat terhadap pelaku LGBT. Teknik pemilihan informan penelitian menggunakan teknik purposive sumpling. Jumlah informan penelitian ini 4 orang dengan kriteria informan yaitu pihak penjaga kost pelaku LGBT, tetangga pelaku LGBT, dan masyarakat umum. Dokumentasi dilakukan dengan teknik memotret sesuai dengan izin informan. Teknik analisis data menggunakan teknik analisis interaktif dari Miles dan Huberman, yang meliputi pengumpulan data, reduksi data, penyajian data dan penarikan kesimpulan. Hasil penelitian menunjukan bahwa tanggapan Masyarakat terhadap pelaku LGBT dianggap menyimpang, stigmatisasi terhadap pelaku LGBT di Kota Padang masih menjadi isu yang sangat sensitif dan komplek. Di satu sisi masyarakat yang kental dengan ajaran moral, etika, dan agama cendrung menolak perilaku seksual yang dianggap menyimpang. Peran media sosial juga sangat signifikan dalam membentuk persepsi masyarakat tentang LGBT. Di satu sisi, media sosial dapat menjadi platform yang efektif untuk meningkatkan kesadaran dan pemahaman tentang isu LGBT, namun di sisi lain, paparan konten yang tidak tepat dapat memperburuk stigmatisasi. Oleh karena itu, penting untuk memastikan bahwa informasi yang disajikan di media sosial akurat dan membangun pemahaman yang positif.

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