Article Per Year (5 Year)
p-Index From 2020 - 2025
0.408
P-Index
This Author published in this journals
All Journal Proceeding Applied Business and Engineering Conference Jurnal Litek : Jurnal Listrik Telekomunikasi Elektronika
Milawarni, Milawarni
Unknown Affiliation
Religion Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Transportation Other

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Evaluation of the Effect of Coconut Coir Fiber Addition on Polypropylene Matrix Composite Properties Milawarni, Milawarni; Yusniyanti, Erna; Nurlaili, Nurlaili; Suryati, Suryati
ABEC Indonesia Vol. 12 (2024): 12th Applied Business and Engineering Conference
Publisher : Politeknik Negeri Bengkalis

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Research has been conducted on coconut coir fiber composites with a polypropylene matrix. The aim of thisstudy is to examine the effect of adding coconut coir fiber to the polypropylene matrix on the physical and mechanicalproperties of the composite. The method used is the hand lay-up method, which is carried out in the laboratory by initiallypreparing coconut coir fibers and polypropylene matrix, then mixing them and placing them into molds. Subsequently, hotpressing is performed at a pressure of 38 atm and a temperature of 150°C for 30 minutes. After being cooled to roomtemperature, the composite is tested according to testing standards. The results obtained are the density values of thecoconut coir fiber (CCF) and polypropylene (PP) composites ranging from 0.543-0.7 g/cm3, water absorption capacityranging from 0.5-16.45%, moisture content ranging from 0.14 – 0.22%, and thickness swelling value ranging from 0.76 -15%. For mechanical properties, the MOR value ranges from 11.22 – 19.20 MPa and the MOE value ranges from 220 –350 MPa.
Analisis Performansi Filter Digital IIR untuk Menghilangkan Noise pada Sinyal Suara Hayati, Raisah; Suandi, Ipan; Milawarni, Milawarni
Jurnal Litek : Jurnal Listrik Telekomunikasi Elektronika Vol. 21 No. 1 (2024): Jurnal Litek, March 2024
Publisher : Jurusan Teknik Elektro Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/litek.v21i1.34

Abstract

Pada proses pengiriman informasi dalam sistem komunikasi selalu terdapat gangguan atau noise. Sifat noise yang acak dan tersebar pada semua frekuensi, tidak dapat dihilangkan seluruhnya namun dapat diminimalisir. Untuk meminimalisir noise biasanya digunakan filter. Filter didefinisikan sebagai sistem atau rangkaian yang melewatkan pita freuensi tertentu yang diinginkan dan meredam pita frekuensi lainnya.  Dalam penelitian ini penulis menggunakan filter digital IIR, karena filter digital IIR memiliki respon impulse berdurasi tak hingga sehingga dapat dicocokkan dengan filter analog. Filter digital IIR dirancang di sini menggunakan metode Transformasi Bilinear menggunakan prototype filter analog Butterworth, Chebyshev 1, Chebyshev 2, dan Elliptic. Dari hasil simulasi diperoleh, bahwa untuk mengurangi White Gaussian Noise pada sinyal suara, nilai Signal to Noise Ratio (SNR) tertinggi diperoleh dengan menggunakan filter digital IIR dengan menggunakan prototype Chebyshev 1, yaitu sebesar 15,2884 dB, dan SNR terendah dengan menggunakan filter digital IIR dari prototype Chebyshev 2, yaitu sebesar 10,3079 dB.
Co-Authors Nurlaili Nurlaili Raisah Hayati Suandi, Ipan Suryati Suryati Yusniyanti, Erna