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All Journal Indonesian Journal of Mathematics and Natural Sciences Horizon: Indonesian Journal of Multidisciplinary
Septiano, Alvin Fachrully
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Agriculture, Biological Sciences & Forestry Humanities Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Languange, Linguistic, Communication & Media Mathematics Social Sciences Other

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Analisis Citra Hasil Scanning Electron Microscopy Energy Dispersive X-Ray (SEM EDX) Komposit Resin Timbal dengan Metode Contrast to Noise Ratio (CNR) Septiano, Alvin Fachrully; Susilo, Susilo; Setyaningsih, Natalia Erna
Indonesian Journal of Mathematics and Natural Sciences Vol 44, No 2 (2021): October 2021
Publisher : Universitas Negeri Semarang

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Abstract

Bahan resin timbal menjadi bahan alternatif dari bahan proteksi radiasi. Scanning Electron Microscopy Electron Dispersive X-ray (SEM EDX) banyak digunakan sebagai karakterisai suatu material karena mampu mendapatkan hasil topologi dan nilai konsentrasi atomik dari suatu bahan. Dalam penelitian dilakukan uji SEM EDX dengan sampel resin timbal berbentuk serbuk dengan variasi komposisi resin dan timbal asetat sebesar 0;100, 90;10, 70;30, dan 50;50. Hasil scan EDX menunjukkan komposisi 50;50 memiliki kandungan timbal lebih besar sehingga mampu menjadi bahan proteksi yang baik. Sedangkan uji SEM menghasilkan data berupa citra yang dilakukan perbesaran sebesar 3000, 5000 dan 10.000x. hasil analisis citra SEM menggunakan metode Contrast to Noise Ratio (CNR) menghasilkan rata-rata nilai CNR pada perbesaran 3000, 5000 dan 10.000 kali adalah 8.085, 11.0425, dan 18.495. Dari hasil rata-rata nilai CNR dapat disimpulkan bahwa nilai CNR paling besar pada citra dengan perbesaran 10.000 kali dan dari hasil pengamatan visual citra dengan perbesaran 10.000 kali memiliki detail yang lebih baik dibandingkan perbesaran lainnya sehingga peneliti lebih mudah menentukan objek dan background.
Hubungan Dukungan Sosial dengan Psychological Well-Being pada Santri di Pondok Pesantren Kota Bogor Habib Priyono, Habib Priyono; Alkhowarizmi, Annas; Septiano, Alvin Fachrully
HORIZON: Indonesian Journal of Multidisciplinary Vol. 4 No. 3 (2026): HORIZON: Indonesian Journal of Multidisciplinary
Publisher : Lembaga Intelektual Muda (LIM) Maluku

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54373/hijm.v4i3.5679

Abstract

Background: Life in Islamic boarding schools (pesantren) requires students (santri) to adapt to new and challenging environments, ranging from separation from family to intensive academic and religious pressures. These conditions potentially affect the students' psychological well-being. Social support from peers, caregivers, and family is believed to be a significant protective factor in maintaining individual well-being. Objective: This study aimed to determine the relationship between social support and psychological well-being among santri in pesantren in Bogor City. Methods: A quantitative cross-sectional design was used. The sample consisted of 214 santri selected through stratified random sampling from three pesantren in Bogor City in 2026. Instruments used were the Social Support Scale by Sarafino & Smith and the Ryff Psychological Well-Being Scale. Data analysis included univariate, bivariate, and Pearson correlation tests. Results: The majority of respondents had high social support (58.4%) and moderate psychological well-being (52.3%). Pearson correlation analysis revealed a significant positive relationship between social support and psychological well-being (r = 0.612; p < 0.001). Conclusion: There is a significant relationship between social support and psychological well-being among santri in Bogor City. Higher social support received by santri corresponds to better psychological well-being. These findings underscore the importance of strengthening social support networks within the pesantren ecosystem as a mental health promotion strategy.
Co-Authors Annas Alkhowarizmi Habib Priyono, Habib Priyono Setyaningsih, Natalia Erna Susilo Susilo