Article Per Year (5 Year)
p-Index From 2020 - 2025
0.562
P-Index
This Author published in this journals
All Journal Jurnal Dedikasi Pendidikan Jurnal Mesin Sains Terapan Journal of Mechanical Engineering and Fabrication
Murtadhahadi, Murtadhahadi
Unknown Affiliation
Automotive Engineering Control & Systems Engineering Education Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
PENGARUH PENDIDIKAN KESEHATAN DENGAN VIDEO PEMBELAJARAN TENTANG CARA MENGGOSOK GIGI YANG BENAR PADA ANAK USIA SEKOLAH Nurdin, Ambia; Zamzami, Zamzami; Muhammad, Muhammad; Murtadhahadi, Murtadhahadi; Bukhari, Bukhari; Fitria, Ricky Dear; Mahyuddin, Mahyuddin; Fuadi, Zahrul; Mulyadi, Mulyadi; Astini, Dewi; Megawati, Cut; Bahri, Idal; Pangastuti, Yunida
Jurnal Dedikasi Pendidikan Vol 8, No 2 (2024): Juli 2024
Publisher : Center for Research and Community Service (LPPM) University of Abulyatama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30601/dedikasi.v8i2.5545

Abstract

Health is an aspect that is very significant in supporting the processes of human life, such as oral and dental health. School-age children are a time when children gain basic knowledge about the importance of cleanliness, especially oral hygiene. School-age children experience many dental and oral health problems such as caries and cavities at this time. The results of basic health research (Riskesdas) in 2018 proved that the prevalence of dental caries in the Indonesian population, including children, was around 80%, while in Aceh people who experienced dental caries reached 80%. Health education is needed as an effort to improve skills, awareness, attitudes and actions. School age children need appropriate learning methods to improve their knowledge and skills in brushing their teeth, one of which is simulation and audiovisual methods such as video media. The purpose of this study was to determine the effect of health education with video lessons on the correct way to brush teeth in school age children. This study is a study using the literature study method by examining 14 journals (9 national journals and 5 international journals) related to the knowledge of brushing teeth in school-age children from all objects studied and considered to be representative of the entire population. The sampling technique in this research was literature review, namely elementary school students. The results of the study were 9 journals that were relevant, using video media, that health education with instructional videos had an effect on students' abilities on how to brush their teeth properly. While 5 journals do not use video media, they are still related to the title of the researcher. Based on the results of the study, the researchers suggest that this research can be used as a reference in providing health education on how to properly brush teeth for school-age children, especially through video media.
The effect of temperature variation on the surface hardness of AISI 1045 steel using palm shell media with the pack carburizing method Murtadhahadi, Murtadhahadi; Syarif, Jenne; Zannun, Zannun
Journal of Mechanical Engineering and Fabrication Vol. 1 No. 2 (2024): September
Publisher : Journal of Mechafa Engineering and Fabrication

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.64273/jmef.v1i2.12

Abstract

material for making machine components such as shafts, gears, chisels and bearings in motor vehicles. The use of medium carbon steel in the industrial world is accompanied by adjustments to the required metal conditions, such as the machining process and surface treatment. Pack Carburizing is a process of adding carbon elements or chemical heat treatment which is done by changing the chemical composition of the steel surface by heating at austenite temperature. To obtain maximum pack carburizing results, several processes need to be carried out, namely heating temperature, Holding Time, carbon media and quenching. The purpose of this study was to determine the effect of variations in heating temperature on increasing hardness with the Pack Carburizing heat treatment process. The experimental method used in heat treatment at different temperatures was 850 ° C, 900 ° C, 950 ° C and a holding time of 2 hours. From the results of hardness testing on raw materials, the average hardness value was obtained at 64.20 HRC, after the pack carburizing process the average value at a temperature of 850 °C was 75.93 HRC, and at a temperature of 900 °C it was 88.20 HRC, and at a temperature of 950 °C the highest average value was obtained at 90.23 HRC
Analisa Variasi Kecepatan Makan Dan Ketebalan Makan Terhadap Kekasaran Permukaan Material Baja St-41 Pada Proses Bubut Aufar, Raydi; Ariefin, Ariefin; Murtadhahadi, Murtadhahadi
Jurnal Mesin Sains Terapan Vol 8, No 2 (2024): JURNAL MESIN SAINS TERAPAN
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jmst.v8i2.5762

Abstract

Kekasaran permukaan adalah salah satu karakteristik penting dalam metode pemesinan karena berpengaruh pada kinerja komponen mesin. Parameter pemesinan seperti kedalaman potong, kecepatan potong, kecepatan gerak pahat, kecepatan putar spindel, lama waktu pemesinan, pendingin, jenis benda kerja, jenis pahat, dan kondisi pemesinan, memiliki dampak signifikan terhadap kualitas kekasaran permukaan. Penelitian ini bertujuan untuk mengetahui pengaruh putaran spindel dan kedalaman pemotongan dalam proses pembubutan dengan metode dry cutting terhadap kekasaran permukaan Baja ST 41 menggunakan pahat karbida. Penelitian ini dilakukan dengan variasi kecepatan makan 530,4, 224,4, 37,74 mm/menit dan ketebalan makan 0,2, 0,4 dan 0,6 mm. Total 9 spesimen Baja ST 41 digunakan dalam eksperimen ini. Berdasarkan hasil pengujian, Nilai rata-rata kekasaran permukaan pada spesimen A1 adalah 10,334 µm termasuk ke dalam range N10, A2 dengan 8,675 µm (N9), dan A3 rata – rata nilai kekasaran permukaanya ialah 9,296 µm (N9). Sedangkan nilai rata – rata kekasaran spesimen B1 yaitu 3.889 µm (N8), B2 = 2,076 µm (N7), B3 = 2,404 µm (N7). Dan yang terakhir adalah C1 = 1,415 µm (N7), C2 = 1,665 µm (N7), C3 = 1,704 µm (N7) yang artinya tingkat kekasaran permukaan yang dicapai masih dalam standar yang diizinkan dari hasil pada proses pembubutan.Keywords: Kecepatan Makan, Ketebalan Makan, Kekasaran Permukaan, Baja ST 41, Pahat Karbida
Co-Authors Aminuyati Ariefin, Ariefin Astini, Dewi Aufar, Raydi Bukhari Bukhari Fitria, Ricky Dear Idal Bahri Mahyuddin Mahyuddin Megawati, Cut Muhammad Muhammad Mulyadi Mulyadi Nurdin, Ambia Pangastuti, Yunida Syarif, Jenne Zahrul Fuadi Zannun, Zannun