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Ahmad Fajri
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Penerapan teknologi blockchain berbasis smart contract untuk meningkatkan keamanan transaksi finansial online Wirayuda, Steven Aprianto; Lailiyah, Siti; Fajri, Ahmad
Jurnal Simantec Vol 14, No 1 (2025): Jurnal Simantec Desember 2025 (Article in Progress)
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/simantec.v14i1.29893

Abstract

The digital transformation in the financial sector demands a transaction system that is not only fast and efficient but also secure and transparent. This study explores the application of blockchain technology as a solution to the problems found in centralized online financial transaction systems that are vulnerable to manipulation. The objective of this research is to design a blockchain-based financial transaction security system architecture that can be evaluated through a conceptual simulation approach. This study uses a descriptive qualitative method with tools such as Ganache, MetaMask, and Remix IDE to simulate smart contract-based transactions within a local blockchain environment. The novelty of this research lies in the integration of a security system modeling approach with realistic scenario-based simulations, which is rarely discussed in previous studies. The research contributes by producing a modular system architecture that integrates key components—users, smart contracts, validators, and regulators—into a cohesive workflow applicable to various digital financial platforms. Simulation results show that the proposed system enhances security, accelerates transaction validation, strengthens auditability, and reduces operational costs compared to conventional transaction systems. This study provides a strong foundation for the broader development of blockchain-based financial systems that are more resistant to external attacks.Keywords: System Architecture, Blockchain, Transaction Security, Smart Contract, Simulation
JUAL BELI ONLINE DALAM PERSPEKTIF EKONOMI ISLAM PADA MAHASISWA FEBI UNZAH Fajri, Ahmad
Finance : Journal of Accounting and Finance Vol. 1 No. 1 (2023): Volume 1 Nomor 1, Mei 2023
Publisher : universitas Islam Zainul Hasan Genggong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55210/m7gp9b84

Abstract

This study aims to examine the practice of online buying and selling conducted by students of the Faculty of Islamic Economics and Business at Zainul Hasan Islamic University (UNZAH), as well as to analyze these practices from the perspective of Islamic economics. The research employs a descriptive qualitative method with a case study approach. The data sources consist of both primary and secondary data, collected through observation, interviews, and documentation. Data analysis was carried out through data reduction, data presentation, and conclusion drawing. The findings indicate that online buying and selling practices among UNZAH students are carried out in two main stages. The first is the transaction mechanism stage, which begins with the buyer placing an order, followed by the online payment process. Several payment systems are utilized, including bank transfers, credit cards, PayPal, e-wallets, and Cash On Delivery (COD) systems. From the perspective of Islamic economics, the online buying and selling practices carried out by students generally comply with Islamic legal principles. These include requirements that the products sold must be halal and of good quality, the ownership status of the goods must be clear (whether they are personally owned or second-hand), and product quality must be guaranteed. Additionally, there should be a fair correlation between the price and quality of goods to prevent buyer dissatisfaction. Honesty in transactions must also be upheld, particularly concerning the level of trustworthiness between both parties involved.
UTANG PIUTANG DALAM PERSPEKTIF EKONOMI ISLAM Fajri, Ahmad
Finance : Journal of Accounting and Finance Vol. 2 No. 1 (2024): Volume 2 Nomor 1, Mei 2024
Publisher : universitas Islam Zainul Hasan Genggong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55210/0xb66e35

Abstract

Praktik transaksi utang piutang merupakan salah satu aspek pemenuhan hajat hidup melalui interaksi sosial. Sebuah transaksi yang sarat dengan keistimewaan dan keutamaan yang dijanjikan oleh Allah bagi pelakunya (pemberi utang). Praktik utang piutang, selain memiliki sisi positif melalui prinsip tolong-menolong, seringkali juga menjadi sumber perselisihan dan permusuhan antar manusia. Hal ini terjadi ketika manusia mengabaikan prinsip fundamental dalam praktik tolong-menolong ini, yakni kejujuran.
KAJIAN PENDUGA FUNGSI RAGAM PROSES POISSON PERIODIK MAJEMUK DENGAN TREN FUNGSI PANGKAT Fajri, Ahmad; Mangku, I Wayan; Hadi Sumarno
MILANG Journal of Mathematics and Its Applications Vol. 18 No. 2 (2022): MILANG Journal of Mathematics and Its Applications
Publisher : School of Data Science, Mathematics and Informatics, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/milang.18.2.87-97

Abstract

Pada artikel ini dibahas tentang pendugaan fungsi ragam pada proses Poisson periodik majemuk yang mempertimbangkan kehadiran tren fungsi pangkat. Penulisan artikel ini bertujuan untuk mengonstruksi penduga, memeriksa kekonsistenan penduga, menganalisis bias, ragam dan mean squared error (MSE) asimtotik penduga, serta menentukan ukuran interval pengamatan proses terpendek sehingga nilai dugaan yang diperoleh sudah mendekati parameter yang diduga menggunakan simulasi komputer. Hasil kajian yang telah diperoleh berupa rumusan penduga fungsi ragam, syarat-syarat agar penduga yang dirumuskan kokonsisten, rumusan bias asimtotik, ragam asimtotik dan MSE asimtotik penduga. Berdasarkan hasil simulasi diperoleh bahwa penduga sudah mendekati nilai parameter yang diduga jika panjang interval waktu pengamatan adalah 5500.
Parental Contributions to Character Development in Primary Education Fajri, Ahmad
Journal of Foundational Learning and Child Development Vol. 1 No. 01 (2025): January 27, 2025
Publisher : CV. INSPIRETECH GLOBAL INSIGHT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53905/ChildDev.v1i01.5

Abstract

Purpose of the study: This study aims to investigate the role of parents in supporting character education for primary school children in Bangkinang, Indonesia, and to identify effective strategies for parental involvement in character development. Materials and methods: A quantitative research design was employed, involving 186 parents of primary school children (grades 1-6) from five elementary schools in Bangkinang. Data were collected using a structured questionnaire measuring six dimensions of parental involvement in character education. Statistical analysis was conducted using IBM SPSS Statistics version 30. Results: The findings revealed that 78.5% of parents actively participated in their children's character education through various strategies. The most effective approaches included role modeling (M=4.32, SD=0.76), providing guidance (M=4.17, SD=0.84), and establishing consistent routines (M=3.98, SD=0.92). Significant differences were found between parental education levels and the implementation of character education strategies (p<0.05). Conclusions: The study concludes that parental involvement significantly contributes to character development in primary school children. Collaboration between parents and schools is essential for establishing effective character education. Parents who model positive behaviors, provide consistent guidance, and establish routines demonstrate the most effective approaches to character education
MONITORING RUMAH IKAN (RUMPON) LUBUK LARANGAN DI DESA TEBAT KABUPATEN BUNGO PROVINSI JAMBI Kholis, Muhammad Natsir; Maryeni, Sri; Fajri, Ahmad
SEMAH Jurnal Pengelolaan Sumberdaya Perairan Vol 8, No 1 (2024): April
Publisher : Universitas Muara Bungo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36355/semahjpsp.v8i1.1370

Abstract

Rumah ikan (rumpon) di lubuk larangan Desa Tebat sudah ada dan belum diketahui pengaruhnya terhadap hasil tangkapan. Rumpon diharapkan menjadi solusi dari keberadaan lubuk larangan sebagai habitat ikan agar tetap eksis. Tujuan penelitian adalah memonitoring jenis ikan dan keanekaragamannya di sekitar rumpon. Penelitian dilakukan di Desa Tebat Kecamatan Muko-Muko Bathin VII Kabupten Bungo Provinsi Jambi pada bulan September-Desember 2021. Metode penelitian adalah survei, dengan mengumpulkan data langsung di lapangan secara random sampling menggunakan 3 alat tangkap yaitu pancing tajur, pancing joran, dan pancing katrol. Hasil monitoring rumpon lubuk larangan didapatkan 9 jenis ikan dan 3 family. Keanekaragaman di sekitar rumpon kategori sedang (H’ = 1,53), indeks keseragaman (E) ikan kategori rendah (E = 0,17), dan indeks dominasi kategori dominan (Di = 11%).
Studi Empiris terhadap Kinerja & Keamanan Wifi (Studi Kasus di Kota Depok) Fajri, Ahmad
Jurnal Teknologi Informasi dan Ilmu Komputer Vol 6 No 6: Desember 2019
Publisher : Fakultas Ilmu Komputer, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2765.854 KB) | DOI: 10.25126/jtiik.2019661832

Abstract

Pada tahun 2012, Kota Depok memperoleh penghargaan sebagai kota Information and Communication Technology (ICT) dari Kementerian Komunikasi dan Informatika. Salah satu parameter berkembangnya ICT di Kota Depok adalah meningkatnya jumlah pengguna internet dari berbagai sektor terutama perkantoran, hotel dan kampus dengan memanfaatkan jaringan wifi sebagai media transmisinya. Pada penelitian ini, kami melakukan audit terhadap keamanan jaringan wifi di Kota Depok dengan cara melakukan studi lapangan kinerja dan keamanan jaringan wifi menggunakan teknik wardriving. Studi ini mencakup sekitar 536 jaringan wifi di Jalan Margonda Depok. Hasil studi tersebut, kami menemukan bahwa 89% jaringan wifi menerapkan keamanan dengan menggunakan protokol WPA/WPA2, 1% menggunakan protokol WEP dan 10% bersifat terbuka. Kami juga menemukan sebanyak 20% jaringan wifi berada pada channel 1 dan 19% jaringan wifi berada pada channel 6 dan 11. Channel 1, 6 dan 11  merupakan channel yang terbaik bagi penggunaan jaringan wifi karena terbebas dari interferensi jaringan wifi lainnya. Oleh karena itu penilaian kinerja dan keamanan jaringan wifi di Kota Depok dinilai sudah baik sesuai dengan standar IEEE 802.11i yaitu tentang peningkatan pengamanan pada jaringan Wifi menggunakan WPA2 dan 802.11b tentang pengaturan channel wifi yang tidak menimbulkan interferensi.AbstractIn 2012, Depok City was awarded as the city of Information and Communication Technology (ICT) from the Ministry of Communication and Information Technology.One of the parameters of the development of ICT in Depok City is the increasing number of internet users from various sectors, especially offices, hotels and campuses by utilizing wifi networks as the transmission media. In this study, we conducted an audit of the security of wifi networks in Depok City by conducting field studies on the performance and security of wifi networks using wardriving techniques.This study covers about 536 wifi networks on Margonda Street Depok. The results of the study, we found that 89% of wifi networks implement security using the WPA / WPA2 protocol, 1% using the WEP protocol and 10% are open. We also found that as much as 20% of the wifi networks are on channel 1 and 19% of wifi networks are on channels 6 and 11. Channel 1, 6 and 11 are the best channels for using wifi networks because they are free from interference from other wifi networks. Therefore, performance assessment and wifi network security in Depok City are considered to be good in accordance with the IEEE 802.11i standard which is about increasing security on Wifi networks using WPA2 and 802.11b regarding wifi channel settings that do not cause interference.
Mitigasi Sejak Dini Hipertensi pada Penyintas Bencana Tanah Bergerak Desa Mendala Kabupaten Brebes Zuhri, Fuad Minan; Indarwati, Uli Mas’uliyah; Sulistiyowati, Retno; Mujahid, Ikhsan; Fajri, Ahmad
Jurnal Pengabdian UNDIKMA Vol. 6 No. 3 (2025): August
Publisher : LPPM Universitas Pendidikan Mandalika (UNDIKMA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/jpu.v6i3.16939

Abstract

This community service activity aims to enhance knowledge and awareness of disaster-related hypertension and its associated health risks, while simultaneously facilitating early detection of elevated blood pressure among survivors residing in Mendala Village Brebes Regency. The activity involved health counseling, health checks, and free medication for 140 survivors. This activity was carried out through three stages: planning, implementation, and evaluation. The results of blood pressure checks were 50 people who experienced hypertension 1, 2 and systolic, with risk factors mostly middle-aged, elderly and old age as much as 75.6%, and 35.2% were active smokers from men. The evaluation showed a high level of participation and enthusiasm in participating in this activity, where survivors received education related to disaster hypertension, screening, health consultation and free medicine.
Potensi Ekstrak Metanol, Fraksi N-Heksana dan Etil Asetat Daun Kasturi (Mangifera Casturi Kosterm) Terhadap Aktivitasnya Sebagai Anti Bakteri: Potential of Methanol Extract, N-Hexane Fraction and Ethyl Acetate of Kasturi Leaves (Mangifera Casturi Kosterm) for Their Anti-Bacterial Activity Sutomo, Sutomo; Fajri, Ahmad; Viogenta, Pratika; Arnida, Arnida; Wathan, Nasrul
Jurnal Surya Medika (JSM) Vol. 10 No. 3 (2024): Jurnal Surya Medika (JSM)
Publisher : Institute for Research and Community Services Universitas Muhammadiyah Palangkaraya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33084/jsm.v10i3.8484

Abstract

Salah satu tumbuhan obat yang secara empiris memiliki aktivitas antibakteri adalah kasturi (Mangifera casturi). Tumbuhan M. casturi merupakan salah satu tumbuhan khas Kalimantan. Penelitian ini bertujuan menentukan aktivitas antibakteri ekstrak metanol, fraksi n-heksan dan fraksi etil asetat daun M. casturi terhadap bakteri Staphyloccocus aureus, Eschericia coli, dan Salmonella typhi. Metode yang digunakan pada penelitian ini yakni metode Kirby-bauer dan Bioautografi dengan konsentrasi ekstrak metanol, fraksi n-heksan dan fraksi etil asetat  sebesar 5, 10, dan 15% serta kontrol positif siprofloksasin dan kontrol negatif Na-CMC 0,5%. Hasil menunjukkan bahwa diameter zona hambat ekstrak metanol, fraksi n-heksana dan fraksi etil asetat secara berurutan didapat 14,4; 9,21; dan 14,63 mm pada bakteri St. aureus, 14,43; 16,01; dan 17,21 mm pada bakteri E. coli serta 10,23; 8,4; dan 12,21 mm pada bakteri S. typhi. Hasil KLT-Bioautografi dengan eluen n-heksana : etil asetat (5:5)v/v pada fraksi etil asetat dengan Rf 0,45 terdapat zona hambat terhadap S. typhi. Hasil analisis menunjukkan bahwa pemberian perlakuan  ekstrak metanol, fraksi n-heksana dan fraksi etil asetat pada konsentrasi 5, 10, dan 15% berbeda signifikan terhadap kontrol negatif dan positifnya. Fraksi etil asetat daun M. casturi merupakan hasil yang terbaik dalam menghambat bakteri St. aureus, E. coli dan S. typhi. Dengan demikian dapat dikatakan bahwa daun tumbuhan M. casturi berpotensi dalam menghambat pertumbuhan bakteri.
Dampak Kinerja Sukuk terhadap Pertumbuhan Ekonomi di Negara Islam ASEAN Ro’is, Muhammad; Wahab, Abdul Aziz; Fajri, Ahmad
Economic Reviews Journal Vol. 3 No. 1 (2024): Economic Reviews Journal
Publisher : Masyarakat Ekonomi Syariah Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56709/mrj.v3i1.229

Abstract

The ASEAN region has an important role in the global economy, this is of particular interest to examine how economic conditions in ASEAN countries. This study aims to determine the effect of sukuk on economic growth as represented by the GDP variable. The population in this study used three ASEAN countries that have the largest Muslim population, namely, Indonesia, Malaysia and Brunei Darussalam. Using secondary data obtained from the official government website of each country, with data frequency starting from Q1 2015 to Q4 2022, so that the total data obtained is 32. The data is processed using regression tests with the help of SPSS software version 25. The results showed that sukuk had a positive effect on the economies of Indonesia and Malaysia and had no effect on the economy of Brunei Darussalam.
Co-Authors Agus Munandar, Agus Agustina Ahmad Suriansyah Akmalia, Siti Alvia, Refy Alviannor , Muhammad Alwi, Wildan Amal, Muhammad Ikhlashul Amanda, Arizka Ana Nurhasanah, Ana Anggia Murni Annur, Shohifah Anreani, Neni Apandi, Rudi Arif Rahman Hakim Arman Husni Armanto, Nuruddin Arnida Arnida Asihani, Asihani Asnan, Phil Gusti Baladah, Salva Sakha Cahyaningtiyas, Ayu cahyono, didik Citra Azhariat Malasar Daryati, Daryati Dongoran, M Fadli Edi Mulyana Fachry Abda El Rahman Fajar Sidik Siregar Fama, Eugene Fauzi, Lutfi Muhammad Fauzi, Muhammad Sukron Guntur Yulisatria Hadi Sumarno Haikal, Mohammad Fikri Huda, Muchamad Samsul I Wayan Mangku Iglana, Rohta Ikhsan Mujahid Ilhami, Ilhami Indarwati, Uli Mas’uliyah Islamy, Diah Putri Ismail, Azmi Jems Sopacua Lailatul Husna Maharani, Amanda Dwi Maharani, Putri Ayu Maimunah Maryeni, Sri Mispani MK, Samsul Moulida, Dhelia Rahma Muhammad Fahmi MUHAMMAD FAHMI Muhammad Natsir Kholis Muhammad Yusuf Naheria, Naheria Nirvi Lestari , Adinda Nuraina, Kurnia Putri, Tasya Devita Qomariyah Qomariyah Raden Mohamad Herdian Bhakti Radiatul Adawiyah Rajiansyah, Rajiansyah Ramadhani, Nabila Ratna Sari Dewi Retno Sulistiyowati Rofiah, Nur Ronaldi, Irvan Ro’is, Muhammad Safitri, Rosalinda Nur Salsabilah, Rani Saniah Widya, Nur Septiwi, Indah Sholichah, Aas Siti Sigit Setiawan Sutinah Sutinah Sutomo Sutomo Taruk Bua, John Alexandro Tavriyanti, Lisa Tiur Elysabeth Viogenta, Pratika Wahab, Abd. Azis Wahab, Abdul Aziz Wathan, Nasrul Wirayuda, Steven Aprianto Yudistira, Ayuni Yulianto Yulianto Zuhri, Fuad Minan Zulqaiyyim, Zulqaiyyim