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Optimalisasi Pengendalian Persediaan Bahan Baku CV. Dirga Eggtray Pinrang Menggunakan Model Probabilistik pada Kondisi Pemesanan Ulang dan Kehilangan Penjualan Aprizal Resky; Aidawayati Rangkuti; Georgina M. Tinungki
Jurnal Matematika, Statistika dan Komputasi Vol. 18 No. 2 (2022): JANUARY 2022
Publisher : Department of Mathematics, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/j.v18i2.18659

This research discusses about the comparison of raw material inventory control CV. Dirga Eggtray Pinrang. It starts with forecasting inventory for the next 12 periods using variations of the time series forecasting method, where the linear regression method provides accurate forecasting results with a Mean Absolute Percentage Error (MAPE) value of 1,9371%. The probabilistic models of inventory control used are the simple probabilistic model, Continuous Review System (CRS) model, and Periodic Review System (PRS) model. The CRS model with backorder condition is a model that provides the minimum cost of Rp. 969.273.706,20 per year compared to another probabilistic model with the largest difference of Rp. 1.291.814,95 per year, with the optimum number of order kg, reorder level kg, and safety stock kg.

Penentuan Portofolio Saham Optimal Menggunakan Metode Markowitz Sebagai Dasar Keputusan Investasi Nisardi, Muhammad Rifki; Husain, Hartina; Kusnaeni, Kusnaeni; Resky, Aprizal
Square : Journal of Mathematics and Mathematics Education Vol 6, No 1 (2024)
Publisher : UIN Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/square.2024.6.1.20441

A stock portfolio is a combination of two or more securities invested over a specific period and under certain conditions. This study analyzes the combination of stocks that can be formed into an optimal portfolio using the Markowitz method. The Markowitz method is employed to maximize returns and minimize the risks associated with a portfolio. This method uses a mathematical formulation that allows for adjustments based on risk tolerance levels and expected returns to achieve an optimal portfolio. The data used in this study comprises the monthly closing prices of stocks from five selected companies, namely ICBP, BBCA, TLKM, BBNI, and INCO, for the period from June 2019 to December 2022. The findings indicate a recommended portfolio with the lowest risk, known as the Minimum Variance Portfolio (MVP). The MVP comprises the following proportions: ICBP 36.10%, BBCA 36.28%, TLKM 17.84%, INCO 8.39%, and BBNI 1.39%. This combination of stock proportions yields an expected return of 8.58% and a portfolio risk of 21.52%.Keywords: Markowitz method, Minimum Variance Portfolio, Portfolio Optimization.

SAFE LOCK SECURITY PROTOTYPE USING FINGERPRINT AND PIN Zain, Abdul; Amar, Muh Ikhsan; Resky, Aprizal; Putriani, Andi Ika; Imansyah, Nur
INTEK: Jurnal Penelitian Vol 11 No 1 (2024): April 2024
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/intek.v11i1.4780

In general, security safe box is currently still using key combination that has some drawbacks. One of the weaknesses is the risk of lossing of the keys and forgetting the lock codes that impact at users of not being able to operate the safe box. Therefore, the researcher is designing a tool that is more practical and safe that can replace the key of security safe box. In the research, the researcher uses the method of fingerprint and a PIN by designing a circuit input tool using the output fingerprint sensor and keypad. For the series of processor,the researcher applies the Arduino microcontroller Uno R3 while for series output the researcher applies three output circuit such as LCD, Buzzer, and Selenoids. Security tool safe box can only be operated by entering PIN and fingerprint which have been registered. Hence, the users do not need to save an object to operate the safe box. Based on the results of testing, this tool is able to open the safe box by inputting 5 registered ID interchangeably as much as 25 times. The Solenoids then are able to operate when they are given voltage > 9, 5V 350 mA to 12V 800 mA.

DOUBLE PENGAMANAN DATA DENGAN PLAYFAIR CHIPER DAN HILL CHIPER Irmayani, Irmayani; Putrian, A. Ika; Resky, Aprizal; Asrun, Budyanita
Edutech: Jurnal Pendidikan dan Teknologi Vol. 1 No. 2 (2023): Volume 1, No 2, 2023
Publisher : Pusat Studi Bahasa dan Publikasi Ilmiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53696/29872359.149

Kerahasiaan informasi tertentu yang seharusnya hanya dapat diakses oleh pihak yang berhak. Pemindahan data dari satu lokasi ke lokasi lain seringkali menghadapi risiko dari upaya pihak lain yang berusaha mengakses informasi tersebut. Kriptografi membuat informasi baik berupa suara, teks, atau bentuk lainnya, dapat dijaga privasinya atau kerahasiannya ketika dibagikan.terdapat beberapa metode dalam proses pengamanan data. Metode penelitian kuantitatif pengembangan. Penerapan metode playfair dan metode Hill chiper ini selanjutnya mengaplikasikan metode hill chipper dengan pengkodean ASCII menambah Tingkat kerumitan pemecahan plaintext bagi pihak ketiga. Kombinasi metode ini semakin meningkatkan pengamanan data lebih savety.

IMPLEMENTASI ESTIMASI CADANGAN KLAIM MELALUI METODE CHAIN-LADDER PERUSAHAAN ASURANSI Irmayani, Irmayani; Resky, Aprizal
Edutech: Jurnal Pendidikan dan Teknologi Vol. 2 No. 1 (2024): Volume 2, No 1, 2024
Publisher : Pusat Studi Bahasa dan Publikasi Ilmiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53696/29872359.192

Cadangan klaim merupakan alokasi dana yang dialokasikan oleh perusahaan asuransi sebagai antisipasi terhadap kewajiban pembayaran klaim di masa mendatang. Sebagai bentuk mitigasi risiko, perusahaan asuransi menyediakan cadangan klaim yang berfungsi sebagai dana talangan untuk pembayaran klaim yang mungkin timbul. Oleh karena itu perusahaan harus mampu memprediksi cadangan klaim dengan akurat. Salah satu metode yang sering digunakan untuk memprediksi cadangan klaim dengan akurat adalah metode Chain-Ladder. Untuk memudahkan perusahaan asuransi dalam menghitung estimasi cadangan klaim menggunakan Chain-Ladder maka dirancang sebuah aplikasi perhitungan cadangan klaim dengan menggunakan metode Chain- Ladder berbasis desktop. Metode yang digunakan dalam penelitian ini berupa observasi, interview dan analisis literatur. Pada pendesainan sistem meliputi Use Case, Class Diagram, dan Activity Diagram. Dari hasil implementasi aplikasi estimasi cadangan klaim berjalan dengan baik dan dapat mengestimasi cadangan klaim dengan akurat.

Penentuan Portofolio Saham Optimal Menggunakan Metode Markowitz Sebagai Dasar Keputusan Investasi Nisardi, Muhammad Rifki; Husain, Hartina; Kusnaeni, Kusnaeni; Resky, Aprizal
Square : Journal of Mathematics and Mathematics Education Vol. 6 No. 1 (2024)
Publisher : UIN Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/square.2024.6.1.20441

A stock portfolio is a combination of two or more securities invested over a specific period and under certain conditions. This study analyzes the combination of stocks that can be formed into an optimal portfolio using the Markowitz method. The Markowitz method is employed to maximize returns and minimize the risks associated with a portfolio. This method uses a mathematical formulation that allows for adjustments based on risk tolerance levels and expected returns to achieve an optimal portfolio. The data used in this study comprises the monthly closing prices of stocks from five selected companies, namely ICBP, BBCA, TLKM, BBNI, and INCO, for the period from June 2019 to December 2022. The findings indicate a recommended portfolio with the lowest risk, known as the Minimum Variance Portfolio (MVP). The MVP comprises the following proportions: ICBP 36.10%, BBCA 36.28%, TLKM 17.84%, INCO 8.39%, and BBNI 1.39%. This combination of stock proportions yields an expected return of 8.58% and a portfolio risk of 21.52%.Keywords: Markowitz method, Minimum Variance Portfolio, Portfolio Optimization.

PELATIHAN PENGGUNAAN APLIKASI GEOGEBRA UNTUK PENGEMBANGAN MEDIA PEMBELAJARAN MATEMATIKA BAGI GURU SMA DI KOTA PAREPARE Adhalia H, Nurul Fuady; Zaitun, Zaitun; Nisardi, Muh Rifki; Resky, Aprizal; Kusnaeni, Kusnaeni; Husain, Hartina; Tungga, Rifaldy Atlant
Jurnal Abdi Insani Vol 11 No 1 (2024): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v11i1.1299

The The use of technology in the mathematics learning process by high school teachers in the city of Parepare is still lacking. Even though there are many learning media that can be utilized. The Geogebra application is a technological medium that has great potential in integrating mathematical concepts visually and interactively. The aim of implementing this PKM is to provide training to mathematics teachers who are members of MGMP Parepare to develop mathematics learning media at the high school level. The training method used is providing training assistance on the Geogebra application which consists of two stages. The preparation stages consist of observing, coordinating with partners, preparing the service implementation team and preparing the service implementation team regarding the training module. The implementation stages consist of giving a pre-test, providing an explanation regarding the Geogebra application, providing simulation assistance in making mathematics learning media using Geogebra, and providing a post-test. The results obtained from the training showed that 18 out of 20 people or around 90% of teachers were able to understand and apply the knowledge gained in training activities through a post-test given at the end of the activity. Thus, the implementation of the Geogebra Application training activities was considered successful because it had achieved the specified targets.

EDUKASI LITERASI KEUANGAN DIGITAL BAGI GENERASI Z DI SMK DDI PAREPARE Husain, Hartina; Zaitun, Zaitun; Nisardi, Muhammad Rifki; Resky, Aprizal; Kusnaeni, Kusnaeni; M.R, Andi Oxy Rayhan; Herlambang, Dwicki; Nurlia, Nurlia
Jurnal Abdi Insani Vol 11 No 3 (2024): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v11i3.1744

Generation Z who are used to technology have digital financial literacy problems. They lack basic financial understanding, are prone to deceptive online offers, and are vulnerable to cyber fraud. This can result in difficulty achieving financial goals and being in debt. It is important to increase Gen Z's digital financial literacy through education, campaigns and developing educational applications so that they become a financially independent generation. This is the background for implementing this service, where the aim of this service activity is to introduce and integrate digital financial literacy education from an early age, we can help the younger generation to become more financially independent and skilled in managing their money in this digital era. It is hoped that this digital financial literacy education will be able to increase the understanding of generation Z, or in this case, students at SMK DDI Parepare, in increasing awareness about the importance of managing finances. The methods that will be used include webinars, discussions, questions and answers to student participants (i) at SMK DDI Parepare. This training was proven to be effective in increasing the knowledge of generation Z at DDI Parepare Vocational School regarding digital financial literacy, this was shown by the results of the pretest posttest difference test).

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