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All Journal JURNAL KIMIA SAINS DAN APLIKASI JIKUM: Jurnal Ilmu Komputer
Az zahra, Nasywa
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Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Engineering

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Strategi Layanan Keamanan Siber pada Ekosistem Multi-Platform: Tinjauan Literatur Khairudiah, Khairudiah; Reifan, Reifan; Al Hasbi, Alam; Az zahra, Nasywa; Amin, Farid Deza
JIKUM: Jurnal Ilmu Komputer Vol. 2 No. 2 (2026): JIKUM: Jurnal Ilmu Komputer, November 2026
Publisher : LEMBAGA KAJIAN PEMBANGUNAN PERTANIAN DAN LINGKUNGAN (LKPPL)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62671/jikum.v2i2.196

Abstract

The rapid escalation of digital technology adoption has compelled modern organizations to operate within complex multi-platform ecosystems, integrating diverse operating systems, mobile devices, web applications, and cloud services. While this convergence enhances operational agility, it significantly expands the potential attack surface, exposing critical assets to sophisticated cyber threats. This study employs a Systematic Literature Review (SLR) methodology to evaluate and compare contemporary cybersecurity strategies. Analyzing 15 primary studies selected from reputable databases between 2018 and 2024, this research contrasts the efficacy of Perimeter-based models, Defense-in-Depth, and Zero Trust Architecture (ZTA). The findings demonstrate that traditional static security perimeters are obsolete in decentralized environments. Conversely, a hybrid approach combining Zero Trust with AI-driven threat detection offers superior resilience, reducing incident response latency and preventing lateral movement. The study concludes by proposing an integrated security framework that positions cybersecurity as a strategic business enabler rather than a technical support function.
Synthesis of a Slow-Release Fertilizer Composite Based on Microcrystalline Cellulose from Coconut Husk Waste Andini, Vicka; Dwiwibangga, Yoravika; Safniyeti, Safniyeti; Az Zahra, Nasywa; Anis, Ulfah; Elfia, Mega
Jurnal Kimia Sains dan Aplikasi Vol 29, No 2 (2026): Volume 29 Issue 2 Year 2026
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.29.2.149-160

Abstract

This study reports the synthesis and evaluation of a biodegradable slow-release fertilizer based on microcrystalline cellulose (MCC) extracted from coconut husk waste from Seluma Regency, Bengkulu Province. MCC was prepared through sequential acid washing, alkaline delignification, bleaching, and acid hydrolysis. A composite fertilizer was synthesized by incorporating maleate-containing polymer segments into MCC through limited radical grafting and/or esterification, followed by incorporation of polydihydroxymethylurea potassium phosphate (PDMU–KP) using citric acid as an interaction agent. Fourier transform infrared (FTIR) analysis indicates the presence of carbonyl, amide, and phosphate-related functional groups associated with the composite structure. Scanning electron microscopy (SEM) revealed a dense and agglomerated composite morphology with a rough, layered surface and crystalline aggregates, while energy-dispersive X-ray (EDX) analysis verified the presence of C, N, O, P, and K elements within the copolymer matrix. X-ray diffraction (XRD) analysis showed a reduction in cellulose crystallinity after copolymerization, indicating the formation of a polymer composite. Nutrient release tests conducted in distilled water for 28 days demonstrated controlled and differential release behavior governed by polymer swelling and matrix relaxation processes. Phosphate exhibited a maximum release concentration of 0.398 mg/L on day 7, followed by a gradual decrease to 0.058 mg/L by day 28. In contrast, nitrogen release occurred more gradually, reaching a maximum concentration of approximately 3.08 mg/L on day 14 before declining at later stages. These results indicate that the MCC-g-PMA/PDMU–KP copolymer provides sustained nutrient release with distinct release maxima for phosphorus and nitrogen, highlighting its potential as a cellulose-based slow-release fertilizer designed to improve nutrient use efficiency and reduce nutrient losses, derived from locally available coconut husk waste.
Co-Authors Al Hasbi, Alam Amin, Farid Deza Andini, Vicka Anis, Ulfah Khairudiah, Khairudiah Mega Elfia Reifan, Reifan Safniyeti Safniyeti, Safniyeti Yoravika Dwiwibangga