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Numerical Analysis of Energy Converter for Wave Energy Power Generation-Pendulum System Aminuddin, Jamrud; Effendi, Mukhtar; Nurhayati, Nurhayati; Widiyani, Agustina; Razi, Pakhrur; Wihantoro, Wihantoro; Aziz, Abdullah Nur; Abdullatif, R Farzand; Sunardi, Sunardi; Bilalodin, Bilalodin; Arifin, A
International Journal of Renewable Energy Development Vol 9, No 2 (2020): July 2020
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.9.2.255-261

The wave energy power generation-pendulum system (WEPG-PS) is a four-wheeled instrument designed to convert wave power into electric energy. The first wheel is connected to the pendulum by a double freewheel, the second and third are ordinary wheels, while the fourth is a converter component that is axially connected to the electric generator. This design used the Euler-Lagrange formalism and Runge-Kutta method to examine an ideal dimension and determine the numerical solution of the equation of motion related to the rotation speed of the wheels. The result showed that the WEPG-PS' converter system rotated properly when its mass, length, and moment of inertia are 10 kg, 2.0 m, and 0.25 kgm2, respectively. This is in addition to when the radius of the first, second, third, and fourth wheels are 0.5, 0.4, 0.2, and 0.01 m, with inertia values of 0.005, 0.004, 0.003, and 0.1 kgm2. The converter system has the ability to rotate the fourth wheel, which acts as the handle of an electric generator at an angular frequency of approximately 500 - 600 rad/s. The converter system is optimally rotated when driven by a minimum force of 5 N and maximum friction of 0.05. Therefore, the system is used to generate electricity at an amplitude of 0.3 - 0.61 m, 220 V with 50 Hz. Besides, the lower rotation speed and frequency of the energy converter of the WEPG-PS (300 rad/s) and induction generator (50 Hz) were able to generate electric power of 7.5 kW.Â

Dinamika Politik Pencalonan Anies Rasyid Baswedan Sebagai Calon Presiden Oleh Partai Nasional Demokrat (NasDem) Sembiring, Mhd Irfan; Mahrawa, Faisal Andri; Arifin, A; Ardian, Muhammad
JURNAL LANSKAP POLITIK Vol 1 No 3 (2023)
Publisher : Fakultas Ilmu Sosial dan Ilmu Politik Unwahas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/jlp.2023.1.3.9206

Partai Nasional Demokrat (NasDem) resmi mendeklarasikan Anies Baswedan sebagai bakal calon presiden yang akan diusung pada Pemilihan Presiden 2024. Anies Baswedan sebagai figur kuat untuk diusung sebagai calon presiden dalam pemilu mendatang. Sosok yang memiliki keyakinan dan pemikiran sejalan dengan partainya yang mengutamakan kepentingan Nasional. Partai NasDem tidak dapat sendirian dalam mengusung Anies Baswedan. Pasalnya, Partai NasDem hanya meraih 9,05 persen suara pada Pemilu 2019. Sementara syarat ambang batas pencalonan presiden yaitu memiliki 25 persen suara sah nasional atau 20 persen kursi di DPR. Partai NasDem harus mencari rekan koalisi partai politik lain untuk mengusung Anies Baswedan. Partai NasDem menjadi partai politik pertama yang mengumumkan jagoannya. Sebelumnya, Partai NasDem mempunyai dua calon lain yaitu Ganjar Pranowo dan Panglima TNI Jenderal Andika Perkasa. Pasca deklarasi Anies Baswedan dikuatkan dengan terbentuknya Koalisi Perubahan untuk Persatuan dalam memuluskan pencalonan Anies Baswedan menjadi calon presiden serta mencari bakal calon wakil presiden. Pengusulan nama tokoh, keluarnya kader NasDem, curi start kampanye, terbentuknya Koalisi Perubahan untuk Persatuan merupakan bagian dari dinamika selama pencalonan Anies Baswedan. Kedekatan, kesamaan visi dan misi Anies Baswedan, elektabilitas dan hasil survei, keberlanjutan pembangunan di Indonesia, serta prestasi yang membanggakan dari Anies Baswedan ialah faktor-faktor Partai NasDem dalam memilih Anies Baswedan. Penelitian ini dibuat dengan jenis deskriptif kualitatif. Metode bertujuan untuk menggambarkan secara detail fenomena terkait. Penelitian ini mengumpulkan data melalui metode, observasi, dokumen, dan kemudian menganalisis data tersebut secara interpretatif untuk memahami fenomena yang diteliti.

PEMODELAN SPASIAL DALAM MENGIDENTIFIKASI TINGKAT KERENTANAN BANJIR DI KECAMATAN MEJOBO, KABUPATEN KUDUS, JAWA TENGAH, INDONESIA Eka Wulan Safriani; Somantri, Lili; Rohmat, Dede; Setiawan, Iwan; Panjaitan, Budi Rahmah; Arifin, A
Jurnal Tanah dan Sumberdaya Lahan Vol. 11 No. 2 (2024)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtsl.2024.011.2.6

The occurrence of flood disasters is an annual unavoidable event in the Mejobo District, Kudus Regency. This study aims to map the vulnerable areas to floods in the Mejobo District using spatial modelling. The parameters used to determine the vulnerability areas include soil type, elevation, population density, river buffer, rainfall, and land use. The research location is situated in the Mejobo District. The research method employed is the models and multicriteria decision-making (MCDM) techniques, with the assistance of ArcGIS software for data processing and analysis. The research findings yield a final map depicting flood vulnerability, which indicates the distribution of flood-prone areas. Areas with a high level of flood vulnerability are dispersed across agricultural fields and areas adjacent to rivers, covering an area of 1,770 hectares. Meanwhile, areas with a moderate level of vulnerability are predominantly distributed in residential areas, covering an area of 1,907 hectares.

Peran Aktor Dalam Strategi Nation branding Indonesia Melalui Penyelenggaraan Presidensi G20 Indonesia Tahun 2022 Datubara, Laura Angelina Rotua; Arifin, A
INDEPENDEN: Jurnal Politik Indonesia dan Global Vol 4, No 2 (2023): INDEPENDEN : Jurnal Politik Indonesia dan Global
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/independen.4.2.89-96

Sebagai instrumen diplomasi publik, Presidensi G20 Indonesia digunakan untuk melaksanakan strategi nation branding guna mendapatkan kredibilitas dunia internasional. Penelitian ini bertujuan untuk menjelaskan peran aktor yang terlibat dalam strategi nation branding Indonesia melalui penyelenggaraan Presidensi G20 Indonesia. Metode penelitian yang digunakan adalah metode penelitian kualitatif dengan cara deskriptif-kualitatif. Seluruh data dikumpulkan menggunakan teknik studi pustaka. Hasil penelitian menunjukkan bahwa aktor yang terlibat dalam strategi nation branding Indonesia terdiri dari dua, yaitu aktor negara dan non-negara. Aktor negara yang terlibat adalah Presiden RI, Wakil Presiden RI, tiga puluh empat kementerian, dan The Nusa Dua Indonesia Tourism Development Corporation (ITDC) selaku Badan Usaha Milik Negara (BUMN). Aktor negara yang terlibat adalah Satu Collective, Celcius Creative Lab, PT Royalindo Expoduta, PT Dyandra Media International Tbk, Maudy Ayunda, dan William Wongso.

Sensitivity Enhancing of Oil Viscosity Sensor Based on Optical Fiber by Using Bending Angle Method Yunus, Muhammad; Arifin, A; Fuadi, Nurul; Syafar, A. Muhammad
INTEK: Jurnal Penelitian Vol 8 No 1 (2021): April 2021
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/intek.v8i1.2794

Testing of oil viscosity sensor based on plastic optical fiber by using bending angle variation method to enhance the sensor sensitivity. This sensor is made by forming an optical fiber bending angle, it is dipped into the oil viscosity liquid. The light transmitted through into the optical fiber will be received by the photodetector and the measurement results are displayed on the OPM in the form of output power. The best measurement obtained at the bending angle of 300 with value of sensor sensitivity is 1.013 nW/mPa.s. This method has the advantage of high sensitivity in a simple measurement process.

DETECTION OF DISPLACEMENT USING GLASS OPTICAL FIBER SENSOR WITH VARIOUS CONFIGURATION Lebang, Annamaintin Kobong; Arifin, A; Abdullah, Bualkar
Indonesian Physical Review Vol. 4 No. 3 (2021)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v4i3.124

The research has measured the landslide using a displacement sensor based on Glass Optical Fiber (GOF) and Optical Time Domain Reflectometer (OTDR). The sensor manufacture process consists of various materials, structures, configurations, diameters, and directions. The sensor is made using GOF with a single-mode structure and single mode-multimode-Singlemode (SMS) structure. Each system is given a variety of configurations, namely gamma, bowknot, and three loops configuration. Each arrangement is provided a variation of the indentation diameter in three displacement directions. The test results will be read as the power loss on the OTDR in dB units. The results obtained were then compared between two materials, two structures, and directions. Displacement resulting landslides and changes to the sensor, causing power losses, and affecting the characteristics of each sensor. We found the best measurement results with the sensitivity value of 0.241 dB/mm and the resolution value of 0.004 mm. The displacement sensor has been made for measuring landslide in the laboratory-scale simulation based on GOF and OTDR with easier fabrication, easy operation, high sensitivity, better resolution and can be connected to a computer

INTERNET OF MEDICAL THINGS (IoMT)-BASED HEART RATE AND BODY TEMPERATURE MONITORING SYSTEM Laila, Ida; Arifin, A; Armynah, Bidayatul
Indonesian Physical Review Vol. 5 No. 1 (2022)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v5i1.134

Research has been carried out on a heart rate and body temperature monitoring system based on the Internet of Medical Things (IoMT). This study aims to create a system for monitoring heart rate and body temperature remotely in real-time with measurement results displayed on a web server. This research includes several methods such as developing research concepts based on literature studies, system design consisting of hardware and software design, sensor calibration, web server creation, system testing, and direct data retrieval. The hardware manufacturing stage uses several components such as a pulse heart sensor to detect heart rate, DS18B20 sensor to detect body temperature, Arduino Uno microcontroller, Xbee end device, Xbee coordinator, and raspberry pi as a server computer. Then for the use of software on this system, it consists of Arduino Integrated Development Environment (IDE) to run Arduino Uno hardware, XCTU to provide configuration on Xbee, Python to run Raspberry Pi and Django as a framework for building web servers and MySQL as data storage center measurement results. Heart rate monitoring is done by placing a sensor on one of the fingers, and body temperature is done by placing the sensor in the axilla. The output from the sensor in the form of analog data is converted by the Arduino Uno microcontroller into digital data and then sent to the Raspberry Pi module via Xbee. The raspberry pi has processed data is then stored in the database and then displayed on the webserver. The sensor calibration results show that the pulse heart sensor's error rate is 0.41%, and the DS18B20 temperature sensor is 1.09%. After calibration of the sensor, data was collected on the three respondents' heart rate and body temperature. The measurement results show that the system can store each respondent's heart rate and body temperature data in the database and display the measurement results on the webserver in real-time. Based on these results indicate that the system that has been made can work well.

WATER LEVEL MONITORING SYSTEM IN WATER UTILITY COMPANY OPEN CHANNELS BASED ON INTERNET OF THINGS Danti, Trisna Elma; Abdullah, Bualkar; Arifin, A
Indonesian Physical Review Vol. 5 No. 3 (2022)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v5i3.155

Monitoring the water level in the open channels of the regional water utility company needs to be carried out to ensure the availability of raw water to be processed. This research focuses on making a prototype of a water level monitoring system in an open channel utilizing the WSN (Wireless Sensor Network) component as an application of the IoT (Internet of Things) concept. Monitoring the water level in the open channel is carried out using the infrared sensor GP2Y0A02KF0Y. The real-time measurement results are then sent using XBee wireless communication, then processed by the Raspberry Pi to be saved to a database and displayed on the website. The measurement data can be presented on the website in graphs and tables. The GP2Y0A02YK0F sensor has a measurement error of 1.02% with a correlation coefficient of 0.9998. The average delay in sending data to the website is 1 second. The monitoring system can work well when measuring the water level in an open channel. The advantages of this research are that the instrument used has a high level of accuracy at an affordable price, uses low power, is easy to operate, and can store and present real-time data

PEMODELAN SPASIAL DALAM MENGIDENTIFIKASI TINGKAT KERENTANAN BANJIR DI KECAMATAN MEJOBO, KABUPATEN KUDUS, JAWA TENGAH, INDONESIA Eka Wulan Safriani; Somantri, Lili; Rohmat, Dede; Setiawan, Iwan; Panjaitan, Budi Rahmah; Arifin, A
Jurnal Tanah dan Sumberdaya Lahan Vol. 11 No. 2 (2024)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtsl.2024.011.2.6

The occurrence of flood disasters is an annual unavoidable event in the Mejobo District, Kudus Regency. This study aims to map the vulnerable areas to floods in the Mejobo District using spatial modelling. The parameters used to determine the vulnerability areas include soil type, elevation, population density, river buffer, rainfall, and land use. The research location is situated in the Mejobo District. The research method employed is the models and multicriteria decision-making (MCDM) techniques, with the assistance of ArcGIS software for data processing and analysis. The research findings yield a final map depicting flood vulnerability, which indicates the distribution of flood-prone areas. Areas with a high level of flood vulnerability are dispersed across agricultural fields and areas adjacent to rivers, covering an area of 1,770 hectares. Meanwhile, areas with a moderate level of vulnerability are predominantly distributed in residential areas, covering an area of 1,907 hectares.

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