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All Journal Global Economics: International Journal of Economic, Social and Development Sciences Jurnal Ilmiah Teknik Mesin, Elektro dan Komputer
David Maulana
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Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Mechanical Engineering

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The Effect of Attitude on Career Adaptability Through Organizational Citizenship Behavior Fachrudy Asj’ari; David Maulana; Erwan Aristyanto
Global Economics: International Journal of Economic, Social and Development Sciences Vol. 2 No. 3 (2025): September: Global Economics - International Journal of Economic, Social and Dev
Publisher : International Forum of Researchers and Lecturers

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70062/globaleconomics.v2i3.315

Abstract

The purpose of this study is to assess how important attitudes are in relation to the career adaptability of PT. Lima Berjaya Persada Kutorejo - Mojokerto. The respondents in this study who work at PT. Lima Berjaya Persada Kutorejo - Mojokerto, was given a total of 49 questionnaires. Saturated sampling and sampling methods used in this kind of quantitative research. As a result, 49 employees were used as research samples. The data analysis method used is descriptive statistical analysis, especially the SEM-PlS test. Software called Smart Pls 4.0 is used to help with data processing. Analysis of external models (measurement models) used to analyze data. This study uses validity and reliability tests. The following in-depth analysis of the model (structural model evaluation) includes model quality testing (fit model), the use of a bootstrapping approach to test hypotheses, and cross-validation redundancy assessment (Q2). The test results showed that: 1) attitude had a significant and positive influence on Organizational Citizenship Behavior; 2) attitudes have a considerable influence on career adaptability; and 3) organizational citizenship behavior has a great influence on career adaptability. This study provides additional information for interested parties in the world of work about  the influence of attitude on career adaptability through organizational citizenship behavior (ocb) of PT. Lima Berjaya Persada Kutorejo- Mojokerto. In addition, this research is also expected to be a guideline, reference, or reference for future research, The results of this research are expected to be useful for readers and add insight about  the influence of attitude on career adaptability through the organizational citizenship behavior (ocb) of PT. Lima Berjaya Persada Kutorejo – Mojokerto.
Pengaruh Konsentrasi Zat Pelarut Pada Proses Ekstraksi Kulit Buah Naga Merah Sebagai Penurunan Laju Korosi Baja ASTM A36 David Maulana; Kosjoko Kosjoko; Nely Ana Mufarida
Jurnal Ilmiah Teknik Mesin, Elektro dan Komputer Vol. 6 No. 1 (2026): Maret
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51903/juritek.v6i1.6588

Abstract

Korosi merupakan permasalahan utama pada material baja karbon rendah seperti ASTM A36, terutama pada lingkungan air laut yang bersifat agresif. Penelitian ini bertujuan untuk menganalisis pengaruh konsentrasi zat pelarut alkohol pada proses ekstraksi kulit buah naga merah sebagai inhibitor korosi alami terhadap laju korosi baja ASTM A36. Ekstrak kulit buah naga merah dibuat menggunakan variasi konsentrasi alkohol sebesar 70%, 89%, dan 96%, kemudian diaplikasikan melalui proses perendaman baja selama 1, 3, dan 5 hari. Spesimen selanjutnya diuji dalam media air laut selama 30 hari. Laju korosi dihitung menggunakan metode kehilangan berat (weight loss), sedangkan efisiensi inhibitor ditentukan berdasarkan perbandingan laju korosi dengan dan tanpa inhibitor. Hasil penelitian menunjukkan bahwa peningkatan konsentrasi alkohol dan lama waktu perendaman secara signifikan menurunkan laju korosi baja. Nilai laju korosi terendah diperoleh pada konsentrasi alkohol 96% dengan waktu perendaman 5 hari sebesar 0,0032 mmpy, disertai efisiensi inhibitor tertinggi mencapai 82,32%. Temuan ini menunjukkan bahwa ekstrak kulit buah naga merah berpotensi sebagai inhibitor korosi alami yang ramah lingkungan dan efektif untuk perlindungan baja di lingkungan laut.
Co-Authors Aristyanto, Erwan Fachrudy Asj'ari kosjoko kosjoko Mufarida, Nely Ana