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All Journal Jurnal Teknologi Pendidikan Jurnal ABDINUS : Jurnal Pengabdian Nusantara IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA)
Pasaribu, Muhammad Nuh Hudawi
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Automotive Engineering Computer Science & IT Economics, Econometrics & Finance Education Energy Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering

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Air Bersih bagi Masyarakat Pinggir Sungai Bandar Jaksa Tanjung Balai Eswanto, Eswanto; Siman, Siman; Hutauruk, Denny Meisandy; Pasaribu, Muhammad Nuh Hudawi; Putri, Puput Widiasa; Siagian, Tony
Jurnal ABDINUS : Jurnal Pengabdian Nusantara Vol 8 No 2 (2024): Volume 8 Nomor 2 Tahun 2024
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/ja.v8i2.22497

Abstract

Gading sub-district is in Datuk Bandar Tanjung Balai sub-district. In Gading sub-district there is Bandar Prosecutor River which flows into the Asahan River. So far, the people who live around that location have taken water from this river to meet their needs. The problem is that the water they consume is not suitable (smelly water, dark color when it rains, mossy). This activity aims to help partners' problems with the installation of water purification equipment. The implementation method begins with assessing the shortcomings of river water purification technology, then a site survey, equipment installation, and unit handover. The results of implementing this service have been realized at partner locations, clean water has been enjoyed by community. The standard of social life, especially the provision of clean water suitable for consumption for cooking, bathing, washing clothes and other needs, can be helped by this service where there are no similar activities in that location.
Pengaruh Elektroplating Ni-Cr terhadap Wetability dan Ketahanan Korosi Sumuran pada Baja Tahan Karat 316L dalam Media Infus 0,9% NaCl Pakpahan, Binsar Maruli Tua; Pasaribu, Muhammad Nuh Hudawi; Simatupang, Lisnawaty; Silaban, Robert; Pakpahan, Natal Toga Hot Tua; Sihombing, Prada; Sinaga, Sabas DK
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 1 (2025): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i1.197

Abstract

This study aims to evaluate the effect of Ni-Cr electroplating on wettability characteristics and pitting corrosion resistance of 316L stainless steel in 0.9% NaCl infusion media. The electroplating process consisted of a nickel base coating for 15 minutes, followed by chromium plating with durations ranging from 10 to 22.5 minutes. Contact angle measurements showed that Ni-Cr coating increased the contact angle from 71.25° to 86.77°, indicating a surface transformation from hydrophilic to more hydrophobic. This increase in contact angle demonstrates the effectiveness of Ni-Cr plating in enhancing the material’s resistance to liquid penetration, a critical property for biomedical applications. Corrosion tests revealed a reduction in pit count and depth after plating, suggesting a significant improvement in resistance to localised corrosion. These findings indicate that Ni-Cr electroplating significantly improves pitting corrosion resistance. This technique can be implemented to enhance the durability of 316L-based implant materials in corrosive body environments, particularly in applications where long-term biocompatibility and surface stability are essential.
E-LKPD BERBASIS PROBLEM BASED LEARNING: MENINGKATKAN KEMAMPUAN BERPIKIR KOMPUTASIONAL R. Mursid; Muslim; Pasaribu, Muhammad Nuh Hudawi
Jurnal Teknologi Pendidikan (JTP) Vol. 17 No. 2 (2024): Oktober - Jurnal Teknologi Pendidikan
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jtp.v17i2.65197

Abstract

Abstract: Penelitian dan pengembangan ini bertujuan untuk menghasilkan media pembelajaran E-LKPD berbasis PBL untuk meningkatkan kemampuan berpikir komputasional peserta didik. Jenis penelitian ini adalah penelitian pengembangan yang menggunakan model pengembangan 4D yaitu: (1) define, (2) Design, (3) Develop, dan (4) Disseminate. Hasil penelitian menunjukan: (1) Uji validasi ahli materi bahwa media yang dikembangkan sangat layak skor rata-rata 84%. (2) Uji validasi Ahli Desain Instruksional kriteria sangat layak skor rata-rata 87%. (3) Uji validasi Ahli Media kategori sangat layak skor rata-rata 83%. (4) Uji coba perorangan kriteria sangat baik dengan skor rata-rata 90%. (5) Uji coba kelompok kecil kriteria sangat baik dengan skor rata-rata 87%. Dan, (6) Uji coba lapangan kriteria sangat baik dengan skor rata-rata 89%. Uji kepraktisan oleh guru sangat baik dengan skor rata-rata 88%, sedangkan hasil uji kepraktisan pada siswa skor rata-rata 90% kategori sangat baik. Hasil percobaan penggunaan E-LKPD berbasis PBL pada kelas eksperimen rata-rata hasil belajar 86, sedangkan siswa yang diajarkan tanpa menggunakan E-LKPD berbasis PBL nilai rata-rata 70. Pengujian hipotesis menggunakan Independent t-test mendapatkan hasil sig. (2-tailed) sebesar 0,000 yang mana hasil tersebut < 0,05 terdapat perbedaan yang signifikan antara kelas yang dibelajarkan menggunakan E-LKPD berbasis PBL dengan kelas tanpa menggunakan E-LKPD berbasis PBL. Oleh karena itu, penggunaan E-LKPD berbasis PBL dalam pembelajaran efektif untuk meningkatkan kemampuan berpikir komputasional peserta didik. Kata Kunci: E-LKPD, Problem Based Learning, berpikir komputasional Abstract: This research and development aims to produce E-LKPD learning media based on PBL to improve students' computational thinking skills. This type of research is development research using the 4D development model, namely: (1) define, (2) Design, (3) Develop, and (4) Disseminate. The results of the study showed: (1) The validation test of the material expert that the media developed was very feasible with an average score of 84%. (2) The validation test of the Instructional Design Expert criteria was very feasible with an average score of 87%. (3) The validation test of the Media Expert category was very feasible with an average score of 83%. (4) Individual trials criteria were very good with an average score of 90%. (5) Small group trials criteria were very good with an average score of 87%. And, (6) Field trials criteria were very good with an average score of 89%. The practicality test by the teacher was very good with an average score of 88%, while the results of the practicality test on students had an average score of 90% in the very good category. The results of the experiment using PBL-based E-LKPD in the experimental class average learning outcomes of 86, while students who were taught without using PBL-based E-LKPD had an average score of 70. Hypothesis testing using the Independent t-test obtained sig. (2-tailed) results of 0.000 which results <0.05 there is a significant difference between classes taught using PBL-based E-LKPD and classes without using PBL-based E-LKPD. Therefore, the use of PBL-based E-LKPD in learning is effective in improving students' computational thinking skills. Keywords: E-LKPD, Problem Based Learning, computational thinking
Co-Authors Denny Meisandy Hutauruk Eswanto Eswanto Muslim Pakpahan, Binsar Maruli Tua Pakpahan, Natal Toga Hot Tua Putri, Puput Widiasa R. Mursid Robert Silaban Siagian, Tony Sihombing, Prada Siman, Siman Simatupang, Lisnawaty Sinaga, Sabas DK