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All Journal BERKALA FISIKA Jurnal Ilmu Dasar Jurnal Sains Materi Indonesia JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Indonesian Physical Review Jurnal Pengabdian UNDIKMA Jurnal Pusat Inovasi Masyarakat Jurnal Informatika Teknologi dan Sains (Jinteks) JSEP (Journal of Science Education and Practice) Makara Journal of Technology Journal of Internet and Software Engineering
Mahfuddin Zuhri
Departemen Fisika, Fakultas Matematika Dan Ilmu Pengetahuan Alam, IPB University
Religion Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Nursing Physics Public Health Social Sciences Other

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THE USE OF POLYMER GEL ELECTROLYTE CONTAINING I-/I3- REDOX COUPLE TO ASSEMBLY A SOLID STATE DYE SENSITIZED TiO2 SOLAR CELL Akhiruddin Maddu; Irmansyah Irmansyah; Mahfuddin Zuhri
Jurnal Sains Materi Indonesia Vol 9, No 1: OKTOBER 2007
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (421.707 KB) | DOI: 10.17146/jusami.2007.9.1.4826

Abstract

THE USE OF POLYMER GEL ELECTROLYTE CONTAINING I-/I3- REDOX COUPLE TO ASSEMBLY A SOLID STATE DYE SENSITIZED TiO2 SOLAR CELL. A solid state dye sensitized TiO2 nanocrystalline solar cells was assembled employing a polymer gel electrolyte contains of iodide/triiodide (I-/I3-) redox couple. The use of solid electrolyte based on polymer matrix for redox ‘couples is aimed to overcome several problems of liquid cell, such as leaks of electrolyte that result in degradation of solar cell. TiO2 nanocrystalline layer was grown on TCO glass substrate by doctor blade technique was stained by synthetic dye Ruthenium 535 for a day. To complete the cell, a polymer gel based on poly(ethylene glycol) (PEG) containing I-/I3- redox couple was sandwiched between a working electrode (nanoporous TiO2 layer on conductive glass substrate) and a counter electrode (graphite sheet). The solid-state cell does not need a clipp, so the gel polymer electrolyte also acts as a glue to join the electrodes. Two cells assembled with different amount of I-/I3- redox couple used in each cell, one of cell use 20 drops of Iodolyte (contains (I-/I3- redox couple) and another cell use 30 drops of Iodolyte solution (purchased fromSolaronix, SA). The cells were characterized their photovoltaic performances included: open-circuit voltage (Voc), short-circuit current (Isc),maximum power (Pmax), fill factor (FF) and energy conversion efficiency.
Fabrication and Characterization Dye-Sensitized Solar Cell based on TiO2/SnO2 Composit Electrode and Polymer Electrolite Irmansyah Irmansyah; Akhiruddin Maddu; Mahfuddin Zuhri
Jurnal ILMU DASAR Vol 9 No 2 (2008)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (385.271 KB)

Abstract

A solid-state dye-sensitized solar cell based on TiO2/SnO2 composite electrode and polyethylene glycol (PEG) based electrolyte has been fabricated. The solar cell was formed in sandwich structure, which two electrodes sandwiching polymer electrolyte containing a redox couple (I-/I3-). One of the electrode was TiO2/SnO2 composite layer on TCO (transparent conducting oxide) coated glass substrate which sensitized with Ruthenium complex dye as electron donor, and the other electrode was a carbon sheet as a counter electrode. Active area of solar cell was 1.5 cm x 1 cmm. The solar cell was tested by irradiation with mercury lamp of 400 Watt with intensity of 30 mW/cm2 at a distance of 30 cm and sunlight with intensity of 36 mW/cm2. The cell tested with mercury lamp result in an open circuit voltage (VOC) of 420 mV, short circuit current (ISC) of 52 μA, maximum power (Pmax) of 10.4 μW, fill factor (FF) of 48% and energy conversion (η) of 0.023 %. On the other hand, the cell tested with sunlight source result in VOC=480 mV, ISC=48μA, Pmax=12.6 μW, FF=55% and η=0.023%.
UJI KARAKTERISTIK SENSOR SUHU DAN KELEMBABAN MULTI- CHANNEL MENGGUNAKAN PLATFORM INTERNET OF THINGS (IOT) Erus Rustami; Rima Fitria Adiati; Mahfuddin Zuhri; Ardian Arif Setiawan
BERKALA FISIKA Vol 25, No 2 (2022): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

Telah  berhasil  dilakukan  uji  kinerja  empat  jenis  sensor  suhu  dan  kelembaban  yang  tersedia  di pasaran,  yaitu  DHT22,  BME280,  SHT31  dan  DS18B20.    Sensor  tersebut  dihubungkan  dengan WeMos  D1  R1  ESP8266  yang  bertugas  untuk  mengelola  dan  mengirimkan  data  ke  platform internet  of  things  (IoT)  ThingSpeak.  Pengiriman  data  menggunakan  protokol  message  queue telemetry transport (MQTT) yang berdaya rendah (low-power) dan dapat diandalkan (reliable). Laman web ThingSpeak menampilkan grafik suhu dan kelembaban masing-masing sensor. Data suhu dan kelembaban tersebut dibandingkan dengan thermohygrometer sebagai referensi. Hasil pengujian menunjukkan bahwa sensor mampu mendeteksi perubahan suhu ruangan dengan nilai pembacaan  yang  tidak  berbeda  jauh  dengan  referensi.  Secara  umum,  semua  sensor  bekerja dengan  cukup  baik  yang  ditandai  dengan  koefisien  determinasi  yang  cukup  tinggi  pada  kurva kalibrasi yaitu lebih dari 0,94 untuk suhu dan 0,96 untuk kelembaban.
PENERAPAN IOT UNTUK MONITORING PEMBERIAN PAKAN IKAN OTOMATIS PADA AKUARIUM DI PERIKANAN SV IPB Aep Setiawan; Erlin Arlitasari; Mahfuddin Zuhri; Andri Hendriana
Jurnal Informatika Teknologi dan Sains Vol 4 No 3 (2022): EDISI 13
Publisher : Program Studi Informatika Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (652.379 KB) | DOI: 10.51401/jinteks.v4i3.1901

Abstract

Fish feeding is one of the things that needs to be considered in aquaculture so that the fish produced are of high quality. Activities in fisheries at the Sokasi IPB school, the majority of which are still carried out manually, are fish feeding activities. Based on these problems, a system was designed that can control and monitor the process of feeding and supplying fish feed automatically using nodeMCU ESP8266. The tool can be accessed anywhere and anytime through the Blynk app. It is hoped that this tool can be used as a solution so that fish feeding activities in the Fisheries of the IPB Vocational School become faster, easier, and more efficient. Fish are fed according to the scheduled time with an appropriate dose. The process of feeding fish and feed supplies can be monitored remotely through the Blynk application. Alerts in the form of notifications and alarm sounds coming from the buzzer will be active if the value of the feed supply is smaller than 5 cm. The error value processed from the test is 0%.
The use of Red Cabbage’s anthocyanine extract as a photosensitizer on a Dye-Sensitized Nanocrystalline TiO2 Solar Cell Maddu, Akhiruddin; Zuhri, Mahfuddin; Irmansyah, Irmansyah
Makara Journal of Technology Vol. 11, No. 2
Publisher : UI Scholars Hub

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Abstract

The use of Red Cabbage’s anthocyanine extract as a photosensitizer on a Dye-Sensitized Nanocrystalline TiO2 Solar Cell. A solid-state dye-sensitized nanocrystalline TiO2 solar cell utilizing anthocyanin extract form red cabbage as photosensitizer was fabricated. The solar cell was formed in sandwich structure, which two electrodes sandwiching polymer electrolyte containing a redox couple (I-/I3 -). One of the electrodes, namely working electrode, TiO2 layer on TCO (transparent conducting oxide) coated glass substrate was sensitized with anthocyanin dye as electron donor in the system. Another electrode was a carbon sheet as a counter electrode. Gel electrolyte based on PEG (polyethylene glycol) containing a redox couple (I-/I3 -) used instead of liquid electrolyte in this photoelectrochemical cell. Two fabricated cells have an active area of 1 cm2 were soaked with anthocyanine dye for 1 hr and 24 hrs, respectively. The cells were tested by irradiation with halogen lamp of 24 Watt with intensity 4 mW/cm2 at a distance 30 cm. The testing results of the cells show an ideal I-V characteristic with output parameters: open circuit voltage (VOC) of 500 mV, short circuit current (ISC) of 5,6 μA and 7,2 μA for each cells, fill factor (FF) of 48% for both cells, energy conversion (η) of 0.023 % and 0,055 % for the cells with 1 hr and 24 hrs dye soaked, respectively.
Learning Management System Using Scorm and iSpring Free on Physics Learning Aep Setiawan; Mahfuddin Zuhri; Yakin Zhang
JSEP (Journal of Science Education and Practice) Vol 6, No 2 (2022): December 2022
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/jsep.v6i2.5941

Abstract

This study aims to use a learning management system (LMS) as learning media by using SCORM and iSpring free. This research used the ADDIE Model, which consists of 5 stages: Analysis, Design, Develop, Implement, and Evaluate. The ADDIE method facilitates the process of making learning media. The online learning process using LMS helps students to make good use of technology. Using SCORM and iSpring free in LMS helps students easily access material and do quizzes without time and location limits. Learning materials and quizzes using SCORM and iSpring 9 free are successfully created.
WEB MARKET CURUG CIKONENG DAN ALAT SCAN TIKET DENGAN ESP32-CAM UNTUK PENGELOLAAN TRANSAKSI EFISIEN Aep Setiawan; Mahfuddin Zuhri; Henny Endah; Desita Auliafitri; Arda Dwiyana; Arya Prabudi Jaya Priana; Danar Restu Firdaus; Aldiyansyah; Handika Saputra Harahap; Herti; Irmansyah; Muhammad Ifan Al Aziz; Muhammad Fajarudin; Robby Priaji Sakti; Silva Dimas Surya Permana
Jurnal Informatika Teknologi dan Sains (Jinteks) Vol 6 No 1 (2024): EDISI 19
Publisher : Program Studi Informatika Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51401/jinteks.v6i1.3908

Abstract

Penggunaan teknologi web berbasis Internet of Things (IoT) di sektor pariwisata diperlukan untuk mendukung pemasaran. Web Market dibuat untuk kebutuhan market di Curug Cikoneng yang mengintegrasikan alat scan tiket berbasis ESP32-CAM yang menggabungkan teknologi pengembangan web dan IoT. Pembuatan Website bertujuan untuk meningkatkan efisiensi dan kualitas pelayanan bagi pengunjung serta pengelola tempat pariwisata Curug Cikoneng. Fokus utamanya adalah memberikan pengalaman lebih baik melalui penyediaan informasi terkait Curug Cikoneng, layanan pembelian tiket, dan promosi produk UMKM lokal. Integrasi alat scan tiket melibatkan penerapan teknologi pemrosesan gambar untuk pengambilan dan verifikasi otomatis tiket masuk. Website yang dibuat mempermudah calon pengunjung membeli tiket secara online untuk masuk ke Curug Cikoneng secara cepat dan efisien serta dapat mengurangi waktu antrian dipembelian tiket. Pembuatan web market dan integrasi alat scan tiket mencerminkan konsep teknologi modern yang mendukung pengelola dalam mengelola arus pengunjung dengan lebih efektif. Website yang dibuat memberikan kemudahan pengunjung dalam membeli tiket sehingga dapat meningkatkan daya tarik.
Pemanfaatan Limbah Organik Sebagai Eco enzyme dalam Mengatasi Antraknosa pada Tanaman Cabai di Desa Kiarapandak, Bogor Zuhri, Mahfuddin; Astrida Syahwa Nur Ashri; Silvia Nuraini; Amelia; Siti Amalia Agustin; Hafiz Damarjati; Septa Huda Marwah; Adinda Syifa Faulia; Athaya Firdaus; Dania Samoda Renda
Jurnal Pusat Inovasi Masyarakat Vol. 6 No. Khusus: Desember 2024
Publisher : Direktorat Pengembangan Masyarakat Agromaritim, Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpim.6.Khusus.52-62

Abstract

Household waste management is one of the problems that remains unsolved to this day in Kiarapandak Village, Sukajaya Subdistrict, Bogor Regency. This problem is caused by the lack of optimal waste management, especially household waste. The Cozy (eco enzyme) program is executed as a form of public service in hopes to solve said problem by empowering the village community in managing household waste. This program is done through socialization about the utilization of household organic waste as eco enzyme, monitoring the eco enzyme product, and application of the eco enzyme on several plants. The plants that were given the eco enzyme showed good growth and are also protected from anthracnose. This program is considered to provide benefits to the community, especially farmers who are having troubles regarding anthracnose on chili plants.
DEVELOPMENT OF LOW-COST OPTICAL SENSOR-BASED DEVICE FOR REAL-TIME MICROALGAE CONCENTRATION MEASUREMENT Syafutra, Heriyanto; Rustami, Erus; Claudia, Stephanie; Hardiningtyas, Safrina Dyah; Supriyanto, Supriyanto; Zuhri, Mahfuddin
Indonesian Physical Review Vol. 8 No. 2 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i2.473

Abstract

Conventional methods for measuring microalgae concentration in water require several steps and must be carried out in the laboratory. These measurements are usually performed by counting microalgae filaments under an optical microscope using the Sedgewick Rafter Counting (SRC) method or by spectroscopy, utilizing light absorption by microalgae's chlorophyll. In this study, we propose an innovative and portable spectroscopic device for real-time measurement of microalgae concentration by integrating a light-dependent resistor (LDR) sensor and a microcontroller-based processing unit. The microalgae used in this study were Spirulina, a filamentous microalga from the class Cyanophyceae. The SRC method was used as a reference for measuring Spirulina concentration. UV-Vis spectroscopy data showed that the absorption of chlorophyll a and b was in the range of 400 - 450 nm. The absorption coefficients obtained from the UV-Vis absorbance vs. concentration relationship were in good agreement with those obtained from the logarithmic light intensity vs. concentration relationship across all tested predictive models. We confirmed that the emission spectrum of the LED used was aligned with the dominant absorption of Spirulina chlorophyll, ensuring accurate optical detection of microalgae concentration. The developed device demonstrated rapid estimation of microalgae concentration, with an average accuracy of more than 75%. This study showed that a portable and low-cost microalgae concentration measurement system can be developed using optical sensors and microcontrollers as an alternative to laboratory-based measurements. In addition, the designed device can be integrated with Internet of Things (IoT) platforms, enabling real-time monitoring of environmental conditions for applications such as water quality assessment, aquaculture, and biofuel production.
Efficiency Improvement, Design Optimization, and Expansion of Oxygen Flow Valve Holes in Small Industrial Scale Husk Furnaces Hanifan, Rahmah Asri Nurani; Hajar, Siti; Har, Nazopatul Patonah; Zuhri, Mahfuddin; Rustami, Erus; Nikmatin, Siti; Irzaman, Irzaman
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 12 No 2 (2023): Jurnal Ilmiah Pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/jipfalbiruni.v12i2.18960

Abstract

Indonesia has an abundant amount of industry. Production in large, medium, and small industries still uses gas and oil as fuel sources. The fuel sources used still come from non-renewable energy. There is a need for alternative use of renewable energy to reduce the use of non-renewable energy. One solution is the use of rice husk biomass as a fuel source. Rice husk is still often considered as waste despite its many utilizations. The utilization of rice husk waste must be improved to increase its beneficial value. Rice husk waste can be utilized as a fuel source in a husk furnace. A husk furnace is a cooking device in which the fuel (rice husk) is burned using direct combustion. This research aims to optimize the efficiency of the husk furnace by varying the size of the oxygen flow valve hole and the mass of water being heated. Tests were conducted on four variations of oxygen flow valve hole size, namely, 36x27 cm2, 36x34 cm2, 43x34 cm2, and 50x34 cm2, and two variations of water mass (6 and 18 kg). The research was conducted by heating water using the Water Boiling Test method with test parameters: heating time, fuel consumption rate, energy in, energy out, heat efficiency, heat transfer rate, and ash and charcoal yield. The significant efficiency value can be used as a reference for small-scale industrial rice husk furnaces. The most significant efficiency in the study was 54.99%, achieved by a 43x34 cm2 valve hole for heating 18 kg of water. Based on the most effective efficiency value gained, the expansion of the oxygen flow valve hole is sufficient to be used as a test parameter to test the optimization of small industrial-scale husk furnaces.
Co-Authors Adinda Syifa Faulia Akhiruddin Maddu Aldiyansyah Amelia Arda Dwiyana Ardian Arif Arya Prabudi Jaya Priana Asep Denih Astrida Syahwa Nur Ashri Athaya Firdaus Claudia, Stephanie Danar Restu Firdaus Dania Samoda Renda Desita Auliafitri Erlin Arlitasari Erus Rustami Hafiz Damarjati Handika Saputra Harahap Hanifan, Rahmah Asri Nurani Har, Nazopatul Patonah Hendriana, Andri Henny Endah Heriyanto Syafutra Herti Irmansyah Irmansyah . Irmansyah Irmansyah Irmansyah Irmansyah Irmansyah Irmansyah Irzaman, Irzaman Karin, Fay Ivana Luluk Setyaningsih Muhammad Fajarudin Muhammad Ifan Al Aziz Rima Fitria Adiati Robby Priaji Sakti Rustami, Erus safrina dyah hardiningtyas Septa Huda Marwah Setiawan, Aep Silva Dimas Surya Permana Silvia Nuraini Siti Amalia Agustin Siti Hajar Siti Nikmatin Supriyanto Supriyanto Yakin Zhang