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All Journal Proceedings of KNASTIK BAREKENG: Jurnal Ilmu Matematika dan Terapan JUTEI (Jurnal Terapan Teknologi Informasi) Journal of Physics and Its Applications IAIC Transactions on Sustainable Digital Innovation (ITSDI) Journal of Fundamental Mathematics and Applications (JFMA) SERVIRISMA: Jurnal Pengabdian kepada Masyarakat Jurnal Sains, Nalar, dan Aplikasi Teknologi Informasi Jurnal Tadris Matematika (JTMT)
Joko Purwadi
Universitas Kristen Duta Wacana
Humanities Astronomy Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Transportation Other

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PENGAMBILAN KEPUTUSAN DENGAN ALGORITMA MINIMAX DALAM PERMAINAN “NIM” Prestianti, Denna; Purwadi, Joko; Rachmat C, Antonius
Proceedings of KNASTIK 2010
Publisher : Duta Wacana Christian University

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Abstract

Permainan NIM merupakan permainan yang dapat melatih pengguna untuk belajar cara memenangkan permainan tanpa ada kata seri. Pemain secara bergantian mengambil biji pada papan NIM dan pemain yang mengambil biji terakhir memenangkan permainan. Tentunya akan sangat menarik untuk membangun sebuah aplikasi yang dapat memberikan perlawanan tangguh terhadap lawan mainnya. Untuk menjadi lawan yang tangguh, komputer harus dapat memprediksi langkah yang akan diambil oleh komputer dan pemain. Salah satu algoritma yang dapat digunakan adalah algoritma Minimax. Algoritma Minimax yang digunakan akan men-generate tree kemungkinan langkah komputer, kemungkinan langkah pemakin dan kemungkinan langkah komputer setelah pemain bermain. Algoritma ini akan membentuk tree kemungkinan langkah sampai node paling dalam, kemudian diikuti dengan node selanjutnya. Setiap node akan diberi nilai untuk menjadi nilai pada node diatasnya dengan menerapkan prinsip min dan max. Penulis telah menerapkan algoritma Minimax pada permainan NIM. Dari hasil penelitian yang dilakukan, penggunaan algoritma Minimax mampu memberikan perlawanan terbaik dengan tingkat kemenangan yang lebih besar dari peman. Akan tetapi, semakin bertambahnya jumlah baris dan jumlah biji, akan membutuhkan waktu yang lama dan tree yang panjang untuk menemukan langkah terbaik.
IMPLEMENTASI SISTEM PAKAR PADA PEMILIHAN VARIETAS PADI Virginia, Gloria; Purwadi, Joko; Kurniasih, Theresa Mariana
Proceedings of KNASTIK 2009
Publisher : Duta Wacana Christian University

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Abstract

Sistem pakar untuk pemilihan varietas padi yang dibangun berhasil memberikan solusi berupa alternatif jenisvarietas padi sesuai dengan fakta yang diinputkan user pada sesi konsultasi. Hasil evaluasi sistem mengindikasikan bahwasistem yang dibangun efektif. Alat ukur yang digunakan adalah penilaian terhadap konsistensi basis pengetahuan danakurasi keluaran sistem. Hal ini dicapai dengan menerapkan metode forward chaining sebagai mesin inferensi sistem.Selain itu, basis data dan basis aturan dibangun sebagai basis pengetahuan sistem, dimana 422 aturan yang terdapat dalambasis aturan dibagi menjadi tujuh prosedur.
PEMBUATAN APLIKASI DOKUMENTASI JARINGAN Briliakta G S., Albert; Agus H., Nugroho; Purwadi, Joko
Proceedings of KNASTIK 2012
Publisher : Duta Wacana Christian University

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Abstract

Jaringan pada sebuah perusahaan ataupun pada sebuah instansi pasti akanberkembang untuk memenuhi kebutuhan perusahaan. Mengakibatkan perusahaanharus menambah atau bahkan merubah struktur jaringan atau topologi jaringanuntuk mendukung kebutuhan perusahaan. Jika hal tersebut terjadi maka seorangadministrator jaringan harus merubah dokumentasi jaringan yang dibuat sesuaidengan perkembangan,Berdasarkan permasalahan diatas seorang networkadministrator harus merubah dokumentasi jaringan seiring dengan berubahnyatopologi jaringan. Dokumentasi tersebut berisikan informasi dari tiap-tiap deviceyang ada dalam jaringan. Perubahan topologi ini dapat menyulitkan administratorjaringan dalam mengelola jaringan jika tidak memiliki dokumentasi yang baik.Sistem yang dibangun oleh penulis terbukti membantu dalam pembuatandokumentasi jaringan. Sistem menyedikan dan membantu administrator jaringandalam membuat topologi dan mendokumentasikan dalam bentuk hasil cetak yangdapat digunakan sebagai dokumentasi jaringan oleh perusahaan tersebut. Sehinggadapat membantu administrator jaringan dalam mengelola dan memaksimalkanjaringan.
BONUS MALUS SYSTEM FOR MOTORIZED VEHICLE INSURANCE USING GEOMETRIC DISTRIBUTIONS AND WEIBULL DISTRIBUTIONS Sevina, Grisselia Rizky; Purwadi, Joko
Journal of Fundamental Mathematics and Applications (JFMA) Vol 6, No 1 (2023)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jfma.v6i1.16505

Abstract

The bonus malus system is one of the systems used to determine the premium amount for the next period based on the claim history of the policyholder. If the policyholder has no claims history or did not file a claim in the previous year, then the policyholder will get a bonus or in other words will get a reduction in the premium rate in the following period. Meanwhile, if the policyholder has a history of claims in the previous year, then the policyholder will be subject to a malus or must pay an increase in the premium rate in the following period. The purpose of this study is to calculate motor vehicle insurance premiums using the classic and optimal bonus malus method which takes into account the frequency of claims with a geometric distribution and the size of claims with a Weibull distribution. The results of this study indicate that the optimal bonus malus system is fairer for policyholders who renew their policies because the premium paid by the policyholder depends on the number of claims and the size of the claim, so that each policyholder will pay a different premium to the number of claims.
Penerapan User Interface Design Pattern untuk Situs Web Katalog Seni Pertunjukan Indonesia I Nyoman Marcel Mahardika; Purwadi, Joko; Susanto, Budi
Jurnal Terapan Teknologi Informasi Vol 7 No 2 (2023): Jurnal Terapan Teknologi Informasi
Publisher : Fakultas Teknologi Informasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21460/jutei.2023.72.275

Abstract

Performing arts play a significant role in the cultural diversity of Indonesia. However, there are still few media outlets that publish information related to performing arts in one centralized platform. Based on the described issue, a performing arts website is needed to display information related to performing arts and have a well-designed user interface. In this study, an interface design for a performing arts website is developed by applying user interface design patterns as a solution in the interface design process. To achieve a user-centered design that meets users' expectations, the User-Centered Design (UCD) method is employed in the interface design process. The test results indicate that the interface design has a high level of effectiveness and efficiency, with an effectiveness score of 97.85% and an efficiency score of 96.94%. Additionally, website testing was conducted using the System Usability Scale (SUS) method, which resulted in a usability score of 82.87 for the performing arts website. The obtained results indicate that the performing arts website is well-received and effectively used by users.
Automation of Remote Laboratory Device Configuration File Management Liandaru, Putu Gde Qwat Bayu; Indriyanta, Gani; Purwadi, Joko
Jurnal Sains, Nalar, dan Aplikasi Teknologi Informasi Vol. 4 No. 1 (2025)
Publisher : Department of Informatics Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/snati.v4.i1.2

Abstract

This study develops a Python-based configuration file management application to automate backup and recovery of network devices in the Universitas Kristen Duta Wacana laboratory, which uses Cisco and Mikrotik devices. The goal is to understand the impact of automation on the effectiveness of backup and recovery, support for remote configuration file management, reduction of recovery time, and its impact on operational sustainability. The Waterfall method is applied with the stages of analysis, design, implementation, testing, and evaluation, using network topology data, device information, and network protocols collected through observation, interviews, documentation, and literature studies. Testing includes scenarios of full and partial backup and recovery, error handling (credentials, lost files, unresponsive devices), and FTP server and database failure conditions on a network topology consisting of four identical blocks with Mikrotik routers and switches. The test results show that the application functions as expected, with all scenarios running smoothly without significant failures, including the ability to filter data according to parameters and detect credential errors. This system is concluded to have met the test objectives and is ready to be implemented.
Influence of annealing on the physical and optical properties of Ge thin films deposited using thermal evaporation Hilmi, Isom; Adam, Muhammad Kevin; Purwadi, Joko; Soesanto, Qidir Maulana Binu; Kusuma, Damar Yoga
Journal of Physics and Its Applications Vol 7, No 2 (2025): May 2025
Publisher : Diponegoro University Semarang Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpa.v7i2.24517

Abstract

Germanium (Ge) is extensively utilized in various technological applications, particularly in optoelectronic devices due to its favorable electronic properties. In this study, Ge thin films were deposited onto soda-lime glass substrates using the thermal evaporation technique. The deposited films were subsequently subjected to annealing at temperatures ranging from 200 to 700 °C. Comprehensive characterization of the films was performed using XRD to analyze crystallinity, UV-Vis spectroscopy to evaluate optical properties, and SEM to investigate surface topography. The annealing process induced a significant phase transformation from an amorphous state to a co-existing Ge and GeO2 structures, as evidenced by XRD measurements. This structural evolution was accompanied by notable changes in the optical properties of the films. Specifically, an increase in annealing temperature resulted in a higher absorbance in the longer wavelength regions of the UV-Vis spectrum. These findings highlight the possibility of a controlled manipulation on the structural and optical characteristics of Ge thin films by thermal treatment, with potential applications in optoelectronic devices.
Developing Android-Based Math Comic with Gamification Based on Mathematics Literacy Fahmi, Syariful; Triyoga, Arilia; Priwantoro, Soffi Widyanesti; Nur Muallifah, Azizah; Purwadi, Joko; Bueraheng, Surairee
JTMT: Journal Tadris Matematika Vol 6 No 1 (2025): Volume 6, Issue 1, June 2025
Publisher : Universitas Islam Ahmad Dahlan (UIAD)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47435/jtmt.v6i1.4137

Abstract

This research is intended to develop a media of comic math learning based on android and mathematics literacy for the materials of linear equations system in two variables. This study is a research and development by using ADDIE model (Analysis, Design, Development, Implementation, and Evaluation). The instruments are validation sheet, students’ response sheet and students' and teachers' interview guideline. The subjects of research are 27 students of grade VIII Sornsasana Sasanupathum School. The object of research is media of Math Comic for the material of linear equations system in two variables. Technique of data collection in the research was questionnaire distribution and interview, meanwhile the researcher analyzed the questionnaire and interview result data quantitatively by changing the qualitative data to be quantitative data to find out the appropriateness of math comic media. The assessment results in the research of math comic media were achieved by the assessment done by content expert with "very excellent" category, while the media expert assessed the media with "very excellent" category and the questionnaire response of students was categorized as "very excellent". All assessments that included assessments of content expert, media expert, and students' response were "very excellent". Based on the result of the assessments, it can be concluded that math comic learning media based on android and mathematics literacy for the materials of linear equations system in two variables is appropriate to use in the math learning teaching.
CANONICAL CORRELATION ANALYSIS OF ECONOMIC GROWTH AND UNEMPLOYMENT RATE Purwadi, Joko; Gumelar, Bagus; Widiantoro, Tri; Ningsih, Zhilvia Noviana
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 18 No 2 (2024): BAREKENG: Journal of Mathematics and Its Application
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/barekengvol18iss2pp1273-1282

Abstract

The paper discusses the relationship between economic growth and the unemployment rate in Indonesia in each province in 2021. Both variables are considered as the dependent variable and there are 5 independent variables used in this research such as human index development, wage minimum region, poor citizens percentage, investment, and farmer rate value in each province. The method used to analyze is canonical correlation analysis, which is one of the dependent methods that are used for multivariate analysis. This method was used to determine which variable had the most significant relationship between dependent and independent variables, the data was taken from the Center of Statistics Bureau Indonesia in 2021. The result shows that among independent variables the human index development had the strongest relation it had 79%, while the correlation between the dependent and independent variable the unemployment rate gives the strongest influence it is 68%.
Comparison Testing Functional and Usability System Mapping Land Agriculture On Platform Web and Mobile Chrismanto, Antonius Rachmat; Purwadi, Joko; Wibowo, Argo; Santoso, Halim Budi; Delima, Rosa; Balisa, Delfia
IAIC Transactions on Sustainable Digital Innovation (ITSDI) Vol 2 No 2 (2021): April
Publisher : Pandawan Sejahtera Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34306/itsdi.v2i2.401

Abstract

The Agricultural Land Mapping System (SPLP) is indispensable in an agricultural country where part of the population is farmers. This system has been developed by the research team since 2019 and has resulted in web and mobile based systems. The Dutatani SPLP system was developed using the Rapid Application Development (RAD) method. Before this system is further implemented in the community, this system needs to be tested in terms of functionality and usability. This research article aims to compare the functionality and reusability testing of web and mobile-based SPLP. The test was carried out using ISO / IEC 9126-4 usability metrics that focus on effectiveness and efficiency, and involve farmers and farmer groups from Gilang Harjo Village, Bantul, Yogyakarta. The results of testing the web-based and mobile-based SPLP system show that overall respondents can do all the tasks given, but it takes a long time to complete. This is influenced by internal factors of the respondents, namely the respondent's lack of experience in using mobile phones for other activities besides telephone and short messages. So that when testing, respondents need more time to adapt to the system. However, based on time on task, mobile-based SPLP testing is faster than web-based ones.
Co-Authors Adam, Muhammad Kevin Albert Briliakta G S. Antonius Rachmat Chrismanto Argo Wibowo Balisa, Delfia Budi Susanto Bueraheng, Surairee Denna Prestianti Gani Indriyanta Gloria Virginia Gumelar, Bagus Halim Budi Santoso Hilmi, Isom I Nyoman Marcel Mahardika Jek Siang Jong Kadek Ayu Yanti Pawitri (Prog. Studi Teknik Informatika Fakultas Teknik Universitas Kristen Duta Wac Kusuma, Damar Yoga Liandaru, Putu Gde Qwat Bayu Ningsih, Zhilvia Noviana Nugroho Agus H. Nugroho Agus Haryono Nur Muallifah, Azizah Raden Gunawan Santosa Rosa Delima Sevina, Grisselia Rizky Soesanto, Qidir Maulana Binu Soffi Widyanesti Priwantoro, Soffi Widyanesti Syariful Fahmi, Syariful Theresa Mariana Kurniasih Triyoga, Arilia Widiantoro, Tri