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All Journal Jurnal Penelitian Fisika dan Aplikasinya (JPFA) GRADIEN Jurnal Penelitian dan Pengabdian Kepada Masyarakat UNSIQ Indonesian Journal of Electrical Engineering and Computer Science
Riska Ekawita
Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Bengkulu
Astronomy Earth & Planetary Sciences Education Materials Science & Nanotechnology Mathematics Physics Other

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Sebaran Arus Permukaan Laut Pada Periode Terjadinya Fenomena Penjalaran Gelombang Kelvin Di Perairan Bengkulu Lestari, Widya Novia; Lizalidiawati, Lizalidiawati; Suwarsono, Suwarsono; Ekawita, Riska
GRADIEN : Jurnal Ilmiah MIPA Vol 11, No 2 (2015): (Juli 2015)
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (276.795 KB)

Abstract

Penelitian Arus laut adalah pergerakan massa air laut yang menyebabkan perpindahan horizontal dan vertikal massa air laut secara terus menerus. Pergerakan arus permukaan laut disebabkan oleh angin sebagai gaya pembangkit utama arus permukaan. Angin di Indonesia didominasi oleh angin monsun yang membawa pengaruh besar terhadap pergerakan arus dan gelombang. Angin Monsun terdiri dari angin monsun barat laut (Desember-Februari) dan angin monsun tenggara (Juni-Agustus). Daerah penelitian ini berada di perairan Bengkulu yang bertujuan untuk mengetahui sebaran arus permukaan laut pada periode terjadinya penjalaran gelombang Kelvin (April-Mei) dan Oktober-November) dan mengetahui seberapa besar pengaruh kecepatan angin terhadap pembangkitan arus permukaan di perairan Bengkulu. Penelitian dilakukan dengan pengolahan data sekunder berupa arus permukaan, dan suhu permukaan laut yang mewakili musim dan data kecepatan angin diolah dengan bantuan program yang dijalankan dengan software Matlab. Data kecepatan angin berasal dari National Center For Environmental Prediction (NCEP-Reanalysis NOAA), data arus permukaan dan suhu permukaan laut berupa hasil luaran prediksi model global HYCOM-NCODA. Hasil pengolahan menunjukkan besarnya kecepatan angin pada musim peralihan I (Maret-Mei) dan 2 (Oktober) terlihat kuat dan arahnya tidak menentu. Analisis yang didapatkan kecepatan angin, sebaran arus permukaan dan suhu permukaan laut di perairan Bengkulu berpengaruh besar terhadap fenomena penjalaran gelombang Kelvin pada musim peralihan I dan II.
Pengenalan Teknologi dan Assembling Robotik RC Bagi Siswa dan Guru di MTs Alquran Harsallakum Kota Bengkulu Ekawita, Riska; Supiyati, Supiyati
Jurnal Penelitian dan Pengabdian Kepada Masyarakat UNSIQ Vol 7 No 1 (2020): Januari
Publisher : Lembaga Penelitian, Penerbitan dan Pengabdian Masyarakat (LP3M) UNSIQ

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32699/ppkm.v7i1.708

Abstract

Kegiatan ekstrakurikuler robotik merupakan salah satu kegiatan yang banyak dikembangkan di setiap jenjang pendidikan sekolah. Begitu juga hal nya MTs Alquran Harsallakum Bengkulu memiliki ekstrakurikuler tersebut untuk mendukung mata pelajaran IPA. Tujuan dari kegiatan ini adalah untuk meningkatkan pengetahuan para siswa dan guru di MTs Alquran Harsallakum Bengkulu di bidang mata pelajaran IPA khususnya ilmu robotik sehingga selanjutnya dapat membuat projek sederhana yang dapat digunakan dalam mempermudah dalam kegiatan belajar mengajar. Metoda pelatihan diawali dengan ceramah, diskusi, praktek perakitan robot, pengontrolan atau uji robot dan evaluasi. Hasil kegiatan ini menunjukan peserta kegiatan pengabdian baik siswa dan guru dapat mengetahui ilmu dasar robotik dan beberapa komponen utama pembentuk suatu robot. Peserta kegiatan pengabdian telah dapat merakit robot sederhana dan membuat program script sederhana untuk memvariasikan gerak robot dan mengendalikan robot sederhana melalui aplikasi di telepon genggam (HP).
A Low Cost C8051F006 SoC-Based Quasi-Static C-V Meter for Characterizing Semiconductor Devices Rahmawati, Endah; Ekawita, Riska; Budiman, Maman; Abdullah, Mikrajuddin; Khairurrijal, Khairurrijal
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 6: October 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

Based on a C8051F006 SoC (system on-a-chip), a simple and low cost quasi-static capacitance-voltage (C-V) meter was designed and developed to obtain C-V characteristics of semiconductor devices. The developed C-V meter consists of a capacitance meter, a programmable voltage source, a C8051F006 SoC-based slave controller, and a personal computer (PC) as a master controller. The communication between the master and slave controllers is facilitated by the RS 232 serial communication. The accuracy of the C-V meter was guaranteed by the calibration functions, which are employed by the program in the PC and obtained through the calibration processes of analog to digital converter (ADC), digital to analog converters (DACs) of the C8051F006 SoC, and the programmable voltage source.  Examining 33-pF and 1000-pF capacitors as well three different p-n junction diodes, it was found that the capacitances of common capacitors are in the range of specified values and typical C-V curves of p-n junction diodes are achieved. DOI: http://dx.doi.org/10.11591/telkomnika.v10i6.1182
Development of Non-Invasive Blood Glucose Level Monitoring System using Phone as a Patient Data Storage Ekawita, Riska; Nasution, Ahmad Azmi; Yuliza, Elfi; Suardi, Nursakinah; Suwarsono, Suwarsono
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 10, No 2 (2020)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v10n2.p103-113

Abstract

Glucose levels that accumulate in the blood can cause other organ disorders and even cause death. To prevent such occurrence, continuous and regular glucose measuring and monitoring is required for diabetes mellitus (DM) patients. Glucose measurement for DM patients are generally performed several times a day, so be required easy, harmless method of measuring the DM patients, and monitoring data are well recorded. Thus in this research, an android non-invasive glucose level system with wireless communication and automatic data storage on the phone’s memory was developed. The study was begun with the built of electronic and software systems as the central part of the measuring system. The electronic section consists of laser and light sensors that respond to a change in blood glucose (BG) levels, the microcontroller that controlled all of the measuring processes, and Bluetooth modules as transceiver on data communication of the android. The software section is built using an App Inventor developed by the Massachusetts Institute of Technology (MIT) to display and store data measurement on the mobile phone. The calibration process of light sensors is done with the standard tool and at last, the wireless communication systems testing and BG levels measurement. The result shows that 94 mg/dl of BG levels by standard tools equals 2.86 volts of voltage measured by the design system. The higher the BG level, the lower the voltage be. Increase the BG level causes the resistance between the transmitter and the receiver to raise and the voltage becomes low.
Co-Authors A.A. Ketut Agung Cahyawan W Endah Rahmawati Khairurrijal khairurrijal Lestari, Widya Novia Lizalidiawati Lizalidiawati Mikrajuddin Abdullah Nasution, Ahmad Azmi Suardi, Nursakinah Supiyati Supiyati Suwarsono Suwarsono Yuliza, Elfi