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Utilization of cassava peel waste (Manihot esculenta) as substrate in the production of cellulase enzymes by Aspergillus niger
Cellulase enzymes is an enzyme that can hydrolyze cellulose into smaller sugar components. Cellulase enzymes are produced due to high demand, with 29.17% in the animal feed industry, 14.67% in the textile industry, and 26.17% in the paper industry. One method of producing cellulase enzymes is by utilizing the cellulolytic microorganism Aspergillus niger. This study aims to optimize cellulase enzyme production by Aspergillus niger through liquid fermentation on cassava peel substrate (Manihot esc...
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Synergistic cultures for resilient mercury bioremediation in ASGM leveraging microbial interactions for sustainable pollutant removal
The widespread use of mercury (Hg) in artisanal and small-scale gold mining (ASGM) necessitates effective bioremediation strategies. This study evaluated the mercury reduction capabilities of two bacterial strains, Bacillus subtilis and Pseudomonas aeruginosa, using real-world ASGM liquid waste. In a seven-day laboratory-scale experiment, we assessed the performance of single and mixed bacterial cultures under varying pH conditions. Our results show that B. subtilis was particularly effective, a...
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Isolation and screening of halotolerant protease-producing bacteria from Lampung fermented shrimp paste
Protease are class of degradative enzymes that hydrolyze proteins, breaking its peptide bond, into smaller peptides and amino acids. Microbial proteases have gained increasing attention due to its productivity and utilization in various industries. Proteolytic bacteria derived from fermented shrimp paste from Lampung have great potential to meet this need. However, studies on these bacteria are still limited, so further research is needed to explore and optimally utilize their potential. This st...
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Mangrove Biodiversity for Coastal Resilience and Sustainability: A Dynamic Case Study from Indonesia
Martuti, Nana Kariada Tri
; Jabbar, Abdul
; Irsadi, Andin
; Sidiq, Wahid Akhsin Budi Nur
; Melati, Inaya Sari
; Eldin Khair, Amar Sharaf
; Mutiatari, Dhita Pracisca
Mangrove degradation and socio-economic vulnerability in the Kendal coast require an integrated approach. The study used ecological surveys (mangrove vegetation analysis, avifauna) and socio-economic (n=186 households). Integrated Coastal Management (ICM) analysis and model were developed using a dynamic approach, encompassing problem identification, conceptual model formulation, and validation preparation. 14 mangrove species (H' index = 1.58–1.80) and 61 bird species (H' = 3.50) were found. Co...
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Comparative Evaluation of Parameter-Efficient Fine-Tuning Strategies for Continual Image Classification
Catastrophic forgetting remains a major challenge in continual transfer learning, where performance on earlier tasks degrades after sequential adaptation. While full fine-tuning updates all parameters and achieves strong performance on new tasks, it is computationally expensive and prone to forgetting. This study compares parameter-efficient fine-tuning (PEFT) methods—adapters, additive learning, side-tuning, LoRA, and zero-initialized layers—against full fine-tuning on CIFAR-100 using a two-sta...
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Exploring the Satisfaction–Revenue Nexus: A Mixed-Methods Analysis of RevPAR Performance in Southeast Asian Three-Star Hotels
This research aims to explore the satisfaction–revenue nexus by examining the effect of tourist satisfaction on Revenue Per Available Room (RevPAR) performance in three-star hotels across Southeast Asia. Grounded in Expectation–Confirmation Theory and the Service-Profit Chain framework, the study conceptualizes tourist satisfaction as a strategic intangible asset that contributes to financial performance through both direct and indirect mechanisms. A mixed-methods sequential explanatory design w...
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Assessment of Site Development Compliance with GBC Indonesia Greenship Criteria in a Technology Office Complex
The increasing demand for land in urban development highlights the urgent need for sustainable construction practices. While green building concepts have gained global traction, the application of appropriate site development remains understudied in the Indonesian context. This study evaluates the implementation of the Appropriate Site Development (ASD) category based on the Greenship New Building v1.2 rating tool developed by the Green Building Council Indonesia (GBCI), using the Techno Buildin...
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Oligonuclear Cobalt Assembly with Schiff-base Ligands
In order to develop molecular magnetic compounds, oligonuclear cobalt complexes with Schiff-base ligands, 1,3-bis(salicylideneamino)-2-propanol (H3salpr), 1,3-bis(5-chlorosalicylideneamino)-2-propanol (H3clsalpr), 1,3-bis(5-bromosalicylideneamino)-2-propanol (H3brsalpr), and 1,3-bis(5-nitrosalicylideneamino)-2-propanol (H3pnsalpr), were synthesized by reaction of cobalt(II) acetate and Schiff-base ligand in organic solvent. The molecular structures of [CoII{CoIII(µ-HL)(µ-CH3COO)(CH3COO)}2] (HL =...
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Development of Canva-Based Mathematics Learning Media to Improve Conceptual Understanding of the System of Linear Equations in Two Variables for Grade VIII Students
Journal of Emerging Technology in Teaching and Learning
Vol 2
, No 1
(2026)
This study aims to develop Canva-based learning media that are valid, practical, and effective in improving students’ conceptual understanding of the System of Linear Equations in Two Variables (SLETV) among eighth-grade students at SMP Negeri 1 Padang Bolak Julu. The research employed a Research and Development (R&D) method using the ADDIE model, which includes the stages of Analysis, Design, Development, Implementation, and Evaluation. The research instruments consisted of questionnaires a...
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Analisis Kinerja Sistem Informasi Ekspedisi Nasional Berorientasi Website dan Mobile
This study aims to evaluate the performance of digital information systems, including websites and mobile applications, used by national expedition companies in Indonesia, using standardized technical indicators from Google Web.dev. This research employs a descriptive and evaluative approach with purposive sampling. The research objects comprise five major national expedition companies: JNE, J&T Express, SiCepat, Pos Indonesia, and Lion Parcel. The evaluation is conducted using four main ind...
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