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All Journal JOURNAL OF INFORMATICS AND TELECOMMUNICATION ENGINEERING Teknologi Indonesia Jurnal Darma Agung
Ginting, Riski Titian
Universitas Prima Indonesia
Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Social Sciences

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INVESTIGATION OF Cu, Mn OR Ti ION SUBSTITUTIONS ON THE MICROWAVE ABSORBANCE PROPERTIES OF BARIUM HEXAFERRITE Sebayang, Perdamean; Sari, Ayu Yuswita; Ginting, Masno; Ginting, Riski Titian
Teknologi Indonesia Vol 37, No 3 (2014)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (16.054 KB) | DOI: 10.14203/jti.v37i3.233

Abstract

The influence of Cu, Mn or Ti ion substitution on the microwave absorbance properties of Barium M-Hexaferrite (BaFe12O19) has been investigated. The sample preparation was held by mixing the raw material of Copper oxide (CuO), Manganese oxide (MnO) or Titanium dioxide (TiO2) with a different composition into BaFe12O19 powder through ball milling process, then sintered at 1100oC for 2 h. The substitution composition for each metal ion (Cu, Mn or Ti) into BaFe12O19 powder was 0.1 and 0.5 % mol. The Vector Network Analyzer (VNA) measurement was used to determine the reflection loss and absorption properties of BaFe12O19 samples within frequency ranging from 410 GHz. The minimum reflection loss 20.3 dB at 4 GHz was achieved, which is related to the 0.1% mol of Ti substitution on BaFe12O19 sample. The reflection loss values could be modified by controlling the metal ions composition which consequently improves the microwave absorption properties. The complex permittivity and permeability were calculated using Nicholson-Ross Weir (NRW) method. The peak of real and imaginary parts of permittivity was consistently appeared at 5.05, 5.92, 6.76, and 7.75 GHz for all metal ions (Cu, Mn and Ti). Furthermore, the complex permeability was found to be independent from frequency and the ion substitution did not significantly influence hexagonal structure and particle size distribution of Barium hexaferrite.
High Precision 3D Printed Syringe Pump for Contact Angle Goniometer Vito Sentosa; Riski Titian Ginting; Fadhillah Azmi; Despaleri Despaleri Perangin-Angin
JOURNAL OF INFORMATICS AND TELECOMMUNICATION ENGINEERING Vol 5, No 1 (2021): EDISI JULY 2021
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jite.v5i1.5321

Abstract

Contact angle goniometer is a tool used to measure the contact angle of a surface which is usually coated with nanomaterial. Contact angle goniometer has an important part, that is syringe pump as a tool for dripping a number of liquids with high precision and accurate flowrate. The function of the syringe pump is to control amount and feedrate of  liquid on a milliliter to microliter scale per minute using a simple microcontroller. In this study, this syringe pump used an arduino as a controller  and a stepper motor as a syringe driver. Casing and the syringe pump mechanism were designed with AutoCAD Fusion360 software and printed using a 3D printer. This syringe pump has an accuracy value of 99.5%, a precision value of 99.7% and a deviation value 0.4 µL which is based on the solution measured using Mettler Toledo 204 analytical balance. From the result, it is obtained that the syringe pump has been used for the contact angle goniometer with an experiment of water being dripped onto the ABS plastic surface with flowrate 100 µL/minute and the surface contact angle was analyzed using imageJ software and the result of the contact angle was 179°. Therefore, based on the result of this study, it can be concluded that the syringe pump can be used as a contact angle goniometer
PERANCANGAN PROTOTYPE SISTEM MONITORING DATA LOGGER UNTUK PENYIRAM TANAMAN SECARA AUTOMATIS Riski Titian Ginting; Franz Beckhen Bauer Simanjuntak; Denny Hasminta Sembiring Maha; Yoga Tri Nugraha
Jurnal Darma Agung Vol 30 No 3 (2022): DESEMBER
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Darma Agung (LPPM_UDA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46930/ojsuda.v30i3.2176

Abstract

Menyiram tanaman merupakan suatu gerakan yang harus dipandang sebagai pemeliharaan karena memerlukan pemasukan air yang cukup untuk melakukan fotosintesis dalam mendapatkan kebutuhannya untuk berkembang. Selama ini menyiram tanaman hanya menggunakan metode manual yang berdasarkan tanaman terlihat kering atau tidak kering (layu). Dalam mengatasi metode manual tersebut dibutuhkan metode terbaru dalam menyiram tanaman, yaitu dengan metode automatis dengan cara membuat sistem monitoring data logger pada tanaman. Hasil yang didapatkan dalam penelitian ini adalah kelembaban tanah yang terbaca pada LCD (Liquid Crystal Display) ketika nilainya kurang dari 500 maka tanaman dikategorikan basah dan relay “LOW” dan ketika nilainya lebih dari 500 maka tanaman dikategorikan kering dan relay “HIGH”, dan tanaman akan tersiram secara automatis.
Co-Authors Ayu Yuswita Sari Denny Hasminta Sembiring Maha Despaleri Despaleri Perangin-Angin FADHILLAH AZMI Franz Beckhen Bauer Simanjuntak Masno Ginting Perdamean Sebayang Vito Sentosa Yoga Tri Nugraha