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All Journal ETIKONOMI Indonesian Journal of Agricultural Science JAM : Jurnal Aplikasi Manajemen International Journal of Advances in Data and Information Systems
Yudhistira Nugraha
Indonesia Center for Rice Research Jl. Raya 9 Sukamandi Subang
Agriculture, Biological Sciences & Forestry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering

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RESPONSE OF SUB1 INTROGRESSION LINES OF RICE TO VARIOUS FLOODING CONDITIONS Nugraha, Yudhistira; Vergara, Georgiana V.; Mackill, David J.; Ismail, Abdel Bagi
Indonesian Journal of Agricultural Science Vol 14, No 1 (2013): April 2013
Publisher : Indonesian Agency for Agricultural Research and Development - MOA

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Two types of floods can be happen in rice crops, i.e. flash floods and  stagnant floods. Flash floods cause complete submergence for up to 2 weeks, while stagnant floods (SF) could partially submerge part of rice  plant. To overcome yield loss due to the floods, introgression of SUB1 gene, known as a gene suppressing cell elongation and carbohydrate  metabolism, to rice genotype can increase plant tolerance to complete submergence for 10 days or more. The study aimed to evaluate the response of 18 rice genotypes, including the recently developed sixth pair SUB1 near isogenic lines (NILs) of mega-rice varieties (Swarna, Sambha Mahsuri, IR64, TDK1, BR11, and CR1009), to various flooding conditions. The rice genotypes were planted at field ponds at Los Banos, Philippines, in the wet season (WS) of 2009. The treatments were 15 days  submergence, SF, SF follows submergence and normal conditions. Each treatment was arranged in completely randomized block design with threereplications. The results showed that the SUB1 introgression rice lines had higher survival compared to the non-SUB1 and did not much elongate their shoots during submergence. Nevertheless, under SF the rice genotypes should elongates their shoots to allow restoring contact with the air. SF and SF follows submergence decreased the panicle number, grainnumber per panicle and panicle fertility. Consequently, the yield declined. It suggests that sensitive genotypes are mostly sourcelimited during grain filling. The SUB1 introgression lines had higher chlorophyll concentration and less depletion in soluble sugar and starch after submergence. Under SF, soluble sugar and starch contents between the SUB1 NILs and  non-SUB1 lines were not significantly different. Introgression of the SUB1 into high-yielding varieties improved submergence tolerance without affecting yield potential. The study indicates that introgression of the SUB1 into taller type rice varieties should be done to compensate the effect of suppressed elongation.
Orchestrating Digital Economy to Foster Economic Resilience of Smart Cities: The Soft System Approach Subkhan, Farid; Maarif, Mohammad Syamsul; Rochman, Nurul Taufiqu; Nugraha, Yudhistira
ETIKONOMI Vol 24, No 1 (2025)
Publisher : Faculty of Economic and Business

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/etk.v24i1.39224

Abstract

Research originality: This study provides new practical knowledge on the digital economy model and strategy to drive the resilient economy of smart cities.Research objective: This study aims to develop a digital economy management model for smart cities, a resilient economy framework for smart cities, and digital economy strategies for smart cities.  Research methods: This study employed a soft system methodology (SSM)-action approach by involving 30 digital economy and smart city experts from Jakarta, Bandung, Semarang, Surabaya, Banyuwangi, and Makassar.Empirical result: This study has successfully developed the digital economy model for smart cities by which digital technology, digital services, and digital finance are the keys. The resilient economy of smart cities is primarily characterized by economies of scale, economic structure, and economic stability. Moreover, the strategies should mainly focus on developing infrastructure and application, digital governance and policy, and digital society.Implication: The policy maker must consider critical policy interventions of the digital economy model and economic resilience goals, including budget priorities to the key digital economy strategies.JEL Classification: M21, O14, O18, P25, R11How to Cite:Subkhan, F., Maarif, M. S., Rochman, N. T., & Nugraha, Y. (2025). Orchestrating Digital Economy to Foster Economic Resilience of Smart Cities: The Soft System Approach. Etikonomi, 24(1), 315 – 334. https://doi.org/10.15408/etk.v24i1.39224.
Analysis of MSME's Financial and Business Improvement Model through Digital Economy Services and Fintech Strategy Subkhan, Farid; Maarif, Mohammad Syamsul; Rochman, Nurul Taufiqu; Nugraha, Yudhistira
Jurnal Aplikasi Manajemen Vol. 22 No. 2 (2024)
Publisher : Universitas Brawijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jam.2024.022.02.10

Abstract

The development of digital technology contributes significant roles to businesses, including micro, small, and medium enterprises (MSMEs). It raises the digital economy and fintech services to the MSMEs market, such as peer-to-peer lending, digital payment, crowdfunding, digital assets, e-commerce, social commerce, etc. This research aims to analyze MSMEs financial and business improvement model by using MSME's digital economy products and fintech penetration strategy in Indonesia. This study employed a mixed research method by integrating the Delphi technique and the Analytical Hierarchy Process (AHP). The Delphi method was used to identify criteria or construct for the research framework, while AHP was used to evaluate and determine the score and priorities of the MSMEs financial performance criteria, business goals, digital economy's alternative products, and fintech penetration strategies. The Delphi method consists of round 1 - to explore the research framework, round 2 - to rank the research indicators, followed by AHP at round 3. The study involves 20 expert panels of MSMEs in greater Jakarta. This study found that the use of digital economy products - particularly fintech will enhance MSMEs' financial performance by increasing sales volume and business profits. It helps them achieving business goals by increasing their revenue and expanding their business. MSMEs need digital payment and mobile banking as vital fintech services. This study also provides strategic guidance to fintech players and government to effectively penetrate fintech products to MSMEs mainly through knowledge dissemination and digital knowledge improvement.
Revisiting Cyber Threats in Government Sectors: A Systematic Review of Attacks, Challenges, and Policy-Level Defenses Nuraeni, Aisyah; Nugraha, Yudhistira; Aminanto, Muhamad Erza
International Journal of Advances in Data and Information Systems Vol. 6 No. 2 (2025): August 2025 - International Journal of Advances in Data and Information Systems
Publisher : Indonesian Scientific Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59395/ijadis.v6i2.1404

Abstract

This paper presents a systematic literature review (SLR) based on the PRISMA framework, synthesizing 128 peer-reviewed studies published between 2020 and 2024, drawn from major scholarly databases. The review investigates cyber threats specifically targeting government institutions and identifies phishing, ransomware, malware, and denial-of-service (DoS) attacks as the most prevalent attack vectors affecting government sector environments. In addition to these threats, the study highlights persistent institutional limitations, such as outdated infrastructure, fragmented inter-agency coordination, limited technical capacity, and regulatory gaps, which hinder effective cybersecurity governance and response. To address these challenges, the review compiles both proactive and reactive mitigation strategies, emphasizing the need for SOC design principles such as scalability, interoperability, inter-agency coordination, and resilience in cyber operations. The paper synthesizes its findings into a taxonomy of threat profiles and contextual constraints, offering a foundational reference for building government-specific SOC models. It also outlines future research directions related to operational validation, capability maturity modeling, and institutional alignment in public-sector cybersecurity architectures. 
Co-Authors Abdel Bagi Ismail Aminanto, Muhamad Erza David J. Mackill Georgiana V. Vergara M. Syamsul Maarif Nuraeni, Aisyah Nurul Taufiqu Rochman Subkhan, Farid