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All Journal Jurnal Sains dan Pendidikan Fisika Komunikasi Fisika Indonesia Berkala Fisika Indonesia : Jurnal Ilmiah Fisika, Pembelajaran dan Aplikasinya Jurnal Fisika Unand Elkawnie JOURNAL ONLINE OF PHYSICS Jurnal Fisika FLUX CIRCUIT: Jurnal Ilmiah Pendidikan Teknik Elektro Jurnal Redoks JISTech (Journal of Islamic Science and Technology) Fisitek : Jurnal Ilmu Fisika dan Teknologi Jurnal Kumparan Fisika Jurnal Fisika dan Terapannya CHEDS: Journal of Chemistry, Education, and Science EINSTEIN (E-JOURNAL) Jurnal Sains dan Teknologi Attadrib: Jurnal Pendidikan Guru Madrasah Ibtidaiyah
Masthura, Masthura
Universitas Islam Negeri Sumatera Utara, Medan, Indonesia
Religion Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Other

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PENERAPAN SOLAR CELL TERHADAP PERINGATAN DINI BENCANA BANJIR BERBASIS IoT Masthura Masthura; Nazaruddin Nasution; Muhammad Rajali Harahap
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.20.2.187-192

Abstract

The purpose of this research is to find out how to design and build a flood early warning system so that it can be connected to the internet network can directly send information, design the Blynk application so that it can receive information, and to find out the flood early warning system that has been built using solar panels. The design of an internet of things-based water level monitoring tool using the blynk application requires several components, namely, arduino uno wifi, ultrasonic sensor HC-SR04, buzzer, led, LCD, Brushless pump dc, and solar panels. The results of measuring water levels using the HC-SR04 sensor have a low error rate with a comparison of the HC-SR04 sensor with a ruler of 1.97%. The time it takes to send the sensor reading notification is 4.42 seconds. A flood early warning system that is connected to the blynk has been realized, marked by the success of the system in measuring water levels and being able to send notifications to the blynk with the right size and status. There is also the average time of sending messages or data to the blynk application in all conditions using arduino uno WiFi is 4.42 seconds. From the results of testing data on solar panels without a load and using a load, the voltage and current of the solar panels are influenced by weather conditions, if the weather is cloudy, the voltage and current generated by the solar panels will decrease.
SISTEM KERJA PANEL SURYA PORTABLE PADA ALAT ELEKTRONIK RUMAH TANGGA Masthura Masthura; Mulkan Iskandar Nasution; Dwitha Astari
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.20.2.193-198

Abstract

The want for electric electricity is an vital a part of human life. Some household appliances use electrical energy from the National Electric Company, but problems often occur in their supply which result in power outages and can disrupt activities and cause harm to the community. The purpose of this research is to understand how to portable solar generators energy can be developed as alternative electrical energy for household electronic devices, to find out how portable solar power generators work as alternative electrical energy for household electronic devices and to find out how solar panels can supplying AC electrified loads to household electronic devices. This research uses an experimental method that innovates in the field of renewable energy by utilizing solar energy (solar panels) as an alternative electrical energy. The test results obtained by this designed tool can turn on household electronic equipment such as rice cookers, fans, LED lights, charge cellphones and laptops with a maximum power of 300 Watts with a time according to the power supplied to the battery capacity so that this hardware maybe used as an alternative electrical energy to replace the generator.
Physical Test Results of Used Cooking Oil Using Mangrove Activated Carbon Ratni Sirait; Masthura Masthura; Wulandari Armaya Sembiring
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 20, No 2 (2023): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v20i2.13960

Abstract

Cooking oil is a human need and has a close relationship with our physical health. Cooking oil is used repeatedly, the color and smell of the oil can change at high temperatures. In this study, used cooking oil can be reused by using adsorbents and materials used for mangrove-activated carbon. The purpose of this study was to determine the test results of used cooking oil before and after the adsorbent. This experiment uses the adsorption method with activation temperature variations of 500℃, 600℃, and 700℃. There are several test parameters, namely Odor, Color, and Moisture Content. The test results show the quality of used cooking oil at an activation temperature of 500℃ obtained Normal Odor, Color: Red 8.1, Yellow 14.0 and Blue 4.8, Water Content 0.07% according to SNI 7709.2019.
Penurunan laju korosi logam aluminium, besi dan baja menggunakan inhibitor ekstrak daun jambu biji Mutiah Lubis; Masthura Masthura; Miftahul Husnah
Berkala Fisika Indonesia : Jurnal Ilmiah Fisika, Pembelajaran dan Aplikasinya Vol 14, No 2 (2023)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/bfi-jifpa.v14i2.25333

Abstract

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UJI KARAKTERISTIK TINTA SPIDOL WHITEBOARD BERBAHAN KARBON TEMPURUNG KELAPA DENGAN VARIASI GUM ARAB Sri Wulandari; Masthura Masthura
Jurnal Kumparan Fisika Vol. 6 No. 2: Agustus 2023
Publisher : Unib Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/jkf.6.2.119-124

Abstract

ABSTRAK   Tempurung kelapa ialah endokarp buah kelapa yang merupakan limbah dari kelapa. Contoh produk olahan tempurung kelapa yang terkenal merupakan karbon aktif. Pada tempurung kelapa mengandung senyawa kimia selulosa (34%) sehingga dapat menghasilkan karbon dengan pigmen berwarna hitam jika dipanaskan. Pigmen ini dapat dijadikan bahan utama penyusun tinta spidol yang ramah lingkungan. Tujuan penelitian ini adalah untuk mengetahui pengaruh variasi massa sampel karbon tempurung kelapa dan gum arab terhadap karakteristik tinta spidol whiteboard. Di bawah penelitian ini ada dua tahapan diawali dengan proses pembuatan karbon tempurung kelapa. Dan pada tahap kedua, tinta diuji karakteristiknya yaitu uji densitas, uji viskositas, uji pH dan uji pigmen tinta. Variasi sampel karbon tempurung kelapa dan gum arab yaitu sampel A (5 g : 5 g), B (7 g : 7 g), C (9 g : 9 g). Hasil penelitian  mendapatkan pengaruh dari variasi karbon tempurung kelapa dan gum arab yaitu nilai densitas dan viskositas mengalami kenaikan dan pH mengalami penurunan serta mendapatkan tinta optimum pada sampel C (9 g : 9 g) yaitu mempunyai nilai densitas 1,0722 gr/cm3, nilai viskositas 3,4844 poise, nilai pH 8,39 yang bersifat basa serta menghasilkan warna hitam pekat.   Kata  kunci : Karbon Tempurung Kelapa, Pigmen, Tinta Spidol   ABSTRACT   The coconut shell is the endocarp of the coconut fruit which is the waste of the coconut. An example of a well-known coconut shell processed product is activated carbon. The coconut shell contains the chemical compound cellulose (34%) so it can produce carbon with a black pigment when heated. This pigment can be used as the main ingredient for eco-friendly marker ink. The purpose of this study was to determine the effect of variations in the mass of coconut shell carbon samples and Arabic gum on the characteristics of whiteboard marker inks. Under this research, two stages begin with the process of making coconut shell carbon. In the second stage, the characteristics of the ink were tested, namely the density test, viscosity test, pH test and ink pigment test. Variations in the samples of coconut shell carbon and gum arabic are samples A (5 g: 5 g), B (7 g : 7 g), C (9 gs : 9 g). The results of the study were influenced by variations in coconut shell carbon and gum Arabic, namely the density and viscosity values ​​increased and the pH decreased and obtained the optimum ink in sample C (9 g: 9 g), which had a density value of 1.0722 gr/cm3, viscosity value 3.4844 poise, a pH value of 8.39 which is alkaline and produces a deep black color    Keywords : Coconut Shell Carbon, Pigment, Marker Ink
REDUKSI BAKTERI TOTAL COLIFORM DAN ESCHERICHIA COLI PADA AIR SUMUR DENGAN MENGGUNAKAN POT KERAMIK BERBAHAN SEKAM PADI DAN ZEOLIT Masthura Masthura; Ratni Sirait; Nurul Rizki Amalia
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.20.3.253-258

Abstract

Well water has been tested using ceramic pots made from clay, rice husk and zeolite which aims to determine the effect of variations in the composition of materials in ceramic pots on reducing levels of total coliform and escherichia coli, as well as to determine the effectiveness of ceramic pots in reducing these bacteria. Variations in clay, rice husk and zeolite ceramic pot materials in the samples were A (60% : 20% : 20%), B (50% : 20% : 30%), and C (40% : 20% : 20%) with a sieve size of 100 mesh which is flowed with a batch system. The process of making ceramic pots is by burning for 8 hours at a temperature of 850°C – 900°C and producing ceramic pots with a height of 18 cm and a diameter of 21 cm. Total coliform with the highest efficiency of 96,15% and Escherichia coli with the highest efficiency of 100% for 152 hours and 136 hours. While the results of the research on the ceramic membrane sample B were able to reduce total coliform and Escherichia coli with the lowest efficiency of 64,10% within 120 hours.
ALAT MONITORING SUHU DAN DETAK JANTUNG MANUSIA BERBASIS INTERNET OF THINGS MENGGUNAKAN BLYNK Masthura Masthura; Mulkan Iskandar Nasution; Rajai Sitorus
JOURNAL ONLINE OF PHYSICS Vol. 9 No. 1 (2023): JOP (Journal Online of Physics) Vol 9 No 1
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v9i1.25905

Abstract

The purpose of this research is to create and design a way to monitor temperature and human heart rate based on the Internet of Things using blynk. The process of making an Internet of Things-based human heart rate and temperature monitoring device begins with hardware design by connecting all tools, namely, NodeMCU Esp8266, Base Board, Mlx90614, Max30100, Oled, Led, and Buzzer followed by designing software on Arduino and the blynk application where later the measurement results will be compared with the actual tool commonly used, namely the Tensimeter. Based on previous research conducted by Agung (2019), a heart rate and body temperature measuring instrument was made using the Ds18b20 temperature sensor and the Max30100 sensor with Bluetooth Hc-05 communication with an accuracy of 99.1% on heart rate and 99.4% on body temperature, and previous research conducted by Jarot (2021), heart rate measurements were carried out with a pulse sensor 3 times with an error of 16.7 – 20%, as well as previous research conducted by Muhlis (2019). 2017), measurements of heart rate and body temperature were carried out wirelessly with a pulse sensor using 10 objects with an error of 4.94% and using an LM35 with 10 objects with an error of 1.66%. In this study using 3 different people objects which were measured 3 times for each object. with an average error percentage of 0.91% for body temperature and 2.90% for heart rate. after going through the process of hardware design and software design, we have succeeded in designing a temperature monitoring device and human heart rate that can be monitored remotely using the blynk application and has functioned properly and works according to its function and has the advantage of being easier to monitor because it is based on the Internet of Things in real time and has very accurate accuracy with measuring instruments commonly used compared to previous studies.
PENGGUNAAN BIJI KELOR (Moringa oleifera L.) DAN BIJI ASAM JAWA (Tamarindus indica L.) PADA PENJERNIHAN AIR SUMUR BOR MELALUI PROSES KOAGULASI DAN FLOKULASI DENGAN METODE SENTRIFUGASI Annisa Aulia Pratiwi; Masthura Masthura; Miftahul Husnah
JOURNAL ONLINE OF PHYSICS Vol. 9 No. 1 (2023): JOP (Journal Online of Physics) Vol 9 No 1
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v9i1.27728

Abstract

Drilled well water at the Ar-Rahmat Mosque in Manunggal Village, Labuhan Deli District, Regency Deli Serdang, North Sumatra Province, has a color that tends to be yellow and cloudy. From the test results, it was found that the turbidity level in the drilled well water reached 35.3 NTU and the iron (Fe) content reached 1.679 mg/L. This shows that the borehole water does not meet clean water standards according to PERMENKES RI No.32 of 2017, namely with a maximum turbidity level of 25 NTU and a maximum iron (Fe) content of 1.0 mg/L. There is one way to purify borehole water by using moringa seeds and tamarind seeds in the coagulation and flocculation processes through the centrifugation method. This study aims to determine the most optimal seed composition in purifying well water. The mass variations used in this study were moringa seeds and tamarind seeds each with a mass of 0.08 grams and 0.09 grams. In this study, the results of the most optimal seed composition for purifying borehole water were tamarind seeds at a mass variation of 0.08 gram with a turbidity value of 0.53 NTU and a value of iron (Fe) content of 0.0087 mg/L. This shows that the drilled well water that has gone through the water purification process meets the PERMENKES RI standard No. 32 of 2017.
Penurunan Kadar TSS Dan BOD Pada Pengolahan Limbah Cair Tahu Dengan Metode Elektrokoagulasi Nujulia Subuharni; Masthura; Ety Jumiati
Jurnal Redoks Vol. 8 No. 2 (2023): REDOKS JULI-DESEMBER
Publisher : Universitass PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/redoks.v8i2.13096

Abstract

Dalam metode elektrokoagulasi, yang menggunakan elektroda yang bertindak sebagai koagulan untuk melepaskan ion-ion logam yang ada di dalam air dan menghilangkan kotoran, arus listrik dialirkan melalui air. Limbah cair tahu harus diolah sebelum dibuang ke air karena sering kali dibuang ke badan air yang mungkin memiliki pengaruh negatif terhadap kualitas air. Penelitian ini bertujuan untuk menurunkan kadar TSS dan BOD pada limbah cair tahu dengan metode elektrokoagulasi. Air limbah yang digunakan dalam penelitian ini dikumpulkan dari Jl Abri Dusun III Desa Pancur Batu Hulu Kecamatan Pancur Batu, Kabupaten Deli Serdang, Sumatera Utara. Parameter yang dievaluasi adalah TSS dan BOD yang mengacu pada Peraturan Menteri Lingkungan Hidup dan Kehutanan Republik Indonesia Nomor P.68/Menlhk-Setjen Tahun 2016, dengan variasi waktu 40, 45, dan 50 menit pada tegangan 12 volt dan jarak elektroda 2 cm. Hasil analisa menunjukkan persentase penurunan kadar TSS dan BOD tertinggi saat waktu 50 menit. Hal ini akan menurunkan kadar TSS sebesar 90,05% dan BOD sebesar 70,89% maka ini menunjukkan bahwa metode elektrokoagulasi efektif digunakan untuk mengolah limbah cair tahu.  
Pemanfaatan Tongkol Jagung Dan Ampas Tebu Dalam Pembuatan Bioetanol Sebagai Bahan Bakar Alternatif Putri Dwi Ananda; Masthura; Abdul Halim Daulay
Jurnal Redoks Vol. 8 No. 2 (2023): REDOKS JULI-DESEMBER
Publisher : Universitass PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/redoks.v8i2.13097

Abstract

Upaya untuk memperkecil ketergantungan penduduk terhadap BBM adalah dengan memanfaatkan bioetanol, sumber energi yang dapat diperbaharui, dan praktik konservasi energi. Tujuan dari penelitian ini untuk mengetahui karakteristik bioetanol dengan variasi volume larutan sari limbah tongkol jagung dan ampas tebu agar dihasilkan bioetanol dengan kadar tertinggi. Variasi sampel yang digunakan adalah volume larutan sari tongkol jagung dan ampas tebu dengan perbandingan A (100%:0%), B (50%:50%), dan C (0%:100%). Proses pretreatment menggunakan NaOH 0,1 M selama 1 jam. Selanjutnya dilakukan proses hidrolisis dengan menambahkan asam klorida (HCl) 0,4 N ke dalam larutan sampai pH antara 4-5 dan difermentasi menggunakan ragi roti sebanyak 7,5 gram selama 5 hari. Analisis yang dilakukan pada bioetanol ini antara lain kadar etanol, kadar air, nilai kalor, dan pH. Bioetanol dari limbah tongkol jagung dan ampas tebu dengan karakteristik optimum terdapat pada sampel bioetanol C yaitu ampas tebu yaitu dengan nilai kadar etanol, nilai kadar air, nilai kalor, dan pH yang masing-masing yaitu 95%, 7,6%, 3546,86 kkal/kg, dan 7,4. Hal ini dikarenakan ampas tebu memiliki potensi sebagai bahan baku lignoselulostik yang dapat digunakan untuk menghasilkan bioetanol karena mengandung kadar gula yang tinggi. Semakin tinggi kandungan gula yang terdapat pada bahan baku maka semakin baik bioetanol yang dihasilkan.
Co-Authors Abdul Halim Daulay Abdullah Aida Febriana Tanjung Ainun Azizah Amanda, Syahna Dwi Andara Paulina Anggun Hermi Palupi Annisa Aulia Pratiwi Ardian Afandi Armansyah Armansyah Arninda Pratiwi Cholish Debby Marantika Dickiy Akbar Dien Rahmi Waruwu Dwitha Astari Ety Jumiati Feby Inka Putri Fitra Aulia Berutu Fitria Nova Hulu Haryu Wanda Desgira Heni Puspita Sari Hilwa Anisa Homsiah Mayang Sari Silalahi Husnah Miftahul Indah Pratiwi Tanjung Indah Sawitri Irmawati Koto Isti Afliza Jefri Ardiansyah Nasution Juli Iriani Jumiati, Ety Kartika Manalu Lansari Daulay Maharani Putri Miftahul Husnah Miftahul Husnah Muhammad Rajali Harahap Mulkan Iskandar Nasution Mulkan Iskandar Nasution Mutiah Lubis Nadilla Putri Nadjara Yolanda Nazaruddin Nasution Nujulia Subuharni Nurul Rizki Amalia Pinem, Lela Feranita Purnama Indah Lase Putri Dwi Ananda Rahmasari Pohan Rajai Sitorus Ramidin, Ramidin Ratni Sirait Ratni Sirait Ratni Sirait Ratni Sirait Ratni Sirait Ria Muliyana Rima Suastika Rizka Alivia Nasution Rizki Qorina Roida Br Sinaga Rosyidah Mardiyah Sagala Rosyidah Mardiyah Sagala Sahdinal Adi sari, Bella Novita Shati Suci Ramadhani Sri Fuji Ariska sri wulandari Syahna Dwi Amanda Tinsia Tinsia Tri Ninda Malika Vicha Indriany Widya, Eka Wulandari Armaya Sembiring Zulkarnain Putra