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All Journal Mandalika Mathematics and Educations Journal Jurnal Teknologi dan Komputer Jurnal Sintak
Agung, Andi
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Mathematics

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Implementation of A Contemporary Model Between Trading Volume, Bid-Ask Spreads, And Stock Return Volatility (Case Study : The Business-27 Index) Agung, Andi; Zaqiyah, Arfatuz; Rozikin, Muhammad; Wafa, Moh. Shohibul; Nuha, Agusyarif Rezka
JURNAL SINTAK Vol. 2 No. 2 (2024): Vol. 2 No. 2 (2024): MARET 2024
Publisher : LPPM-ITEBA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62375/jsintak.v2i2.223

Abstract

Artikel ini memuat analisis hubungan antar variabel perdagangan saham yakni volume perdagangan, bid-ask spreads, dan volatilitas return saham dalam ruang lingkup dua hipotesis utama yakni the mixture of distribution hypothesis (MDH) dan the sequential information arrival hypothesis (SIAH). Hasil perhitungan mengidentifikasi bahwa pada sebagian besar saham terdapat hubungan kontemporer positif antara volume perdagangan terhadap voltilitas return tidak cukup bukti mendukung teori MDH.
Causality Model of Trading Variables Between Trading Volume, Bid-Ask Spreads, and Stock Return Volatility (Case Study: Bisnis-27 Index) Agung, Andi; Zaqiyah, Arfatuz; Rozikin, Muhammad; Wafa, Moh. Shohibul; Nuha, Agusyarif Rezka; Sulistyono, Eko
JURNAL SINTAK Vol. 3 No. 1 (2024): SEPTEMBER 2024
Publisher : LPPM-ITEBA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62375/jsintak.v3i1.317

Abstract

This research explores the causality model between trading volume, bid-ask spread, and stock return volatility in the business index-27. Utilizing historical data, Granger causality analysis is employed to determine the direction and strength of the relationships between these variables. The findings reveal significant causal relationships among trading volume, bid-ask spread, and stock return volatility. These findings offer valuable insights into understanding stock market dynamics and their implications for investment decision-making. Moreover,This article contains an analysis of the relationship between stock trading variables within the scope of two main hypothesis namely the mixture of distribution hypothesis (MDH) and the sequential information arrival hypothesis (SIAH). The calculation results identify that for most stocks there is a one way Granger causality relationship between trading volume and return volatility, which is not sufficient evidence to support the MDH theory.
Strategi pengendalian penyebaran penyakit kolera dengan vaksinasi, edukasi, dan karantina: analisis model dan simulasi Nuha, Agusyarif Rezka; Nashar, La Ode; Agung, Andi; Takaendengan, Bertu Rianto; Nuha, Widyastutifajri
Mandalika Mathematics and Educations Journal Vol 7 No 4 (2025): Desember
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jm.v7i4.10479

Abstract

Cholera is an infectious disease transmitted through water contaminated with Vibrio cholerae bacteria. This disease remains a public health challenge, especially in areas with poor sanitation. This study developed an SVIQR-B mathematical model to analyze the dynamics of cholera spread, taking into account the effects of quarantine, vaccination, and environmental hygiene education. The analysis was conducted on disease-free and endemic equilibrium points using a local stability approach based on the basic reproduction number (R0). The results showed that when R0 < 1 , the disease would disappear from the population, while R0 > 1 indicated the potential for endemicity. Sensitivity analysis and numerical simulation results indicate that an increase in the transmission rate and a decrease in vaccine effectiveness cause an increase in the value, while an increase in vaccination coverage and the effectiveness of education contribute to a decrease in infection rates. These findings emphasize the importance of implementing integrated medical and educational interventions in efforts to control cholera in a sustainable manner.
Rancang Bangun Sistem Informasi Inventaris Barang Berbasis Web Pada Bengkel Rama Motor Menggunakan Laravel Agung, Andi; Perdana, Ayu Lestari; El Fazza, Fahri
Jurnal Teknologi dan Komputer (JTEK) Vol. 5 No. 02 (2025): DESEMBER
Publisher : Teknik Informatika Universitas Islam Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56923/jtek.v5i02.255

Abstract

Penelitian ini membahas pengembangan sistem informasi inventaris barang berbasis web pada bengkel Rama Motor dengan menggunakan framework Laravel. Tujuannya untuk menggantikan proses pencatatan manual yang lambat dan rawan kesalahan dengan sistem digital yang efisien dan real-time. Sistem ini diharapkan mempermudah staf dalam mengelola stok barang serta mempercepat pengambilan keputusan terkait pengadaan. Metode yang digunakan adalah Research and Development (R&D) dengan pendekatan model Waterfall. Proses dimulai dari analisis kebutuhan, perancangan sistem menggunakan ERD dan UML, implementasi menggunakan Laravel dan MySQL, hingga pengujian menggunakan metode black-box. Desain antarmuka dirancang dengan Adobe XD, dan pengkodean dilakukan di Visual Studio Code. Hasil pengembangan menunjukkan sistem mampu menjalankan seluruh fitur utama seperti log in, manajemen user, pengelolaan barang dan supplier, transaksi masuk/keluar, serta laporan. Sistem juga dilengkapi pengamanan melalui validasi input, enkripsi data, dan proteksi terhadap serangan injeksi. Pengujian menunjukkan seluruh fitur berfungsi dengan baik tanpa error signifikan. Sistem ini mendukung efisiensi operasional, akurasi pelaporan, dan kemudahan akses data stok secara real-time.
Co-Authors Agusyarif Rezka Nuha Bertu Rianto Takaendengan Eko Sulistyono Sulistyono El Fazza, Fahri La Ode Nashar Perdana, Ayu Lestari Rozikin, Muhammad Wafa, Moh. Shohibul Widyastutifajri Nuha Zaqiyah, Arfatuz