Article Per Year (5 Year)
p-Index From 2021 - 2026
3.609
P-Index
This Author published in this journals
All Journal Pythagoras: Jurnal Matematika dan Pendidikan Matematika Media Statistika Jurnal Teknologi Informasi dan Ilmu Komputer Journal of Mathematics and Mathematics Education (JMME) BAREKENG: Jurnal Ilmu Matematika dan Terapan Indonesian Journal of Applied Informatics Jurnal Bumigora Information Technology (BITe) Jurnal Ilmiah Matematika Journal of Applied Data Sciences Jurnal Pengabdian kepada Masyarakat STATISTIKA Seminar Nasional Riset dan Teknologi (SEMNAS RISTEK) International Conference on Digital Advanced Tourism, Management, and Technology Radiant : Journal of Applied, Social, and Education Studies
Winita Sulandari
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Mathematics Mechanical Engineering Physics Public Health Social Sciences Transportation Other

Published : 27 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 27 Documents
Search

 1   2   3 
COMPARISON OF CLUSTERING EARTHQUAKE PRONE AREA IN SUMATRA ISLAND USING K-MEANS AND SELF-ORGANIZING MAPS Ardiyani, Faradilla; Sulandari, Winita; Susanti, Yuliana
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 20 No 1 (2026): BAREKENG: Journal of Mathematics and Its Application
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/barekengvol20iss1pp0017-0030

Abstract

An earthquake is a sudden vibration on the earth's surface caused by the shifting of tectonic plates. One region in Indonesia that is particularly prone to earthquakes is Sumatra Island, due to its geographical location at the convergence of two tectonic plates, namely the Indo-Australian plate, which is actively subducting beneath the Eurasian plate. While earthquakes cannot be prevented or avoided, effective disaster mitigation strategies can help minimize the impact. The purpose of this research is to classify earthquake-prone areas on Sumatra Island based on depth and magnitude, allowing for further analysis to determine the characteristics of the clustering results. The study employs two clustering methods to analyze earthquake data from 1973 to 2024: the K-means and Self-Organizing Maps (SOM) algorithm. K-means algorithm is preferred for its simplicity and efficiency in handling large datasets, and suitability for numerical earthquake data analysis. Conversely, the SOM algorithm offers more stable clustering results and preserves the topological structure of the data, making it advantageous for exploring spatial patterns. The research findings indicate that the K-means algorithm provides better grouping, achieving a Silhouette Coefficient of 0.53, compared to 0.47 for the SOM algorithm. The K-means clustering resulted in two clusters: Cluster 1 contains 1,213 members and is characterized by shallow depths (3.9 km-41 km) and larger magnitudes (5 - 8.92 ), indicating a higher risk level. In contrast, Cluster 2 includes 412 members and represents areas with greater depths (40.8 km-70 km) and smaller magnitudes (5 - 6.85 ), corresponding to a lower risk level. This research aims to support the government in its earthquake disaster mitigation efforts, especially on Sumatra Island.
FORECASTING STATIONARY CLIMATE DATA USING AUTOREGRESSIVE MODELS AND HIGH-ORDER FUZZY Kayyisa, Alfien Diva; Sulandari, Winita; Slamet, Isnandar
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 20 No 1 (2026): BAREKENG: Journal of Mathematics and Its Application
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/barekengvol20iss1pp0313-0324

Abstract

Forecasting is essential for improving aviation safety, with air humidity being a critical factor influenced by air temperature. This study analyzes daily humidity data from I Gusti Ngurah Rai Airport, one of Indonesia’s busiest air stations, using two time series modeling approaches: Autoregressive (AR) and high-order fuzzy modeling. The objective is to evaluate and compare their forecasting accuracy. Historical daily data from the Meteorology, Climatology, and Geophysics Agency of Indonesia were used to build the forecasting models. The optimal linear AR model served as the foundation for constructing the AR high-order fuzzy model, which incorporates linguistic rules to capture nonlinear patterns. Both models were implemented and evaluated using the Mean Squared Error (MSE) metric. Results show that the AR(2) model outperforms the AR high-order fuzzy model, achieving a lower MSE of 13.23. This suggests that the AR(2) model provides more accurate humidity forecasts over the observed period. These findings offer practical insights for policymakers and decision-makers in forecasting daily humidity levels and supporting aviation operations. While the study confirms the effectiveness of traditional AR modeling, it also highlights limitations of the fuzzy approach, particularly its sensitivity to parameter tuning and data sparsity. The integration of high-order fuzzy modeling represents a novel contribution to this domain, though further refinement is needed to enhance its forecasting performance.
Exploring Spatial Nonstationarity in the Number of Motor Vehicles in East Java Using Robust Geographically Weighted Regression with an MM-Estimator Isnaini, Bayutama; Isnandar Slamet; Sulandari, Winita; Khoirunissa, Husna Afanyn
PYTHAGORAS Jurnal Matematika dan Pendidikan Matematika Vol. 20 No. 2 (2025)
Publisher : Department of Mathematics Education, Faculty of Mathematics and Natural Sciences, UNY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/pythagoras.v20i2.90866

Abstract

The number of motor vehicles in each region is quite diverse, not least in East Java Province. The variety of number of motor vehicles can be affected by local factors that are important to study so that vehicle growth can be adequately anticipated. On the other hand, economic growth incentives are influenced by people's purchasing power. In addition, motor vehicles are one of the essential things in the sustainability of economic activities. This study aims to evaluate a robust, geographically weighted regression model with an MM-estimator (RGWR MM-estimator), which is considered suitable for analyzing the number of motor vehicles in East Java. The results showed that the RGWR MM-estimator model generates an estimate of the number of motor vehicles based on the HDI explanatory variables, road length, sex ratio, poverty gap index, and the number of colleges that is accurate compared to other models formed. In addition, there are significant differences in the influence of the five explanatory variables in each region. Districts/cities located near the capital of East Java Province tend to have many explanatory variables that have a significant effect compared to regencies/cities far from the provincial capital.
Profile Of Tourist Visits In Sangiran Site Area, Sragen Regency Subanti, Sri; Slamet, Isnandar; Sulandari, Winita; Zukhronah, Etik; Sugiyanto, Sugiyanto; Susanto, Irwan
Journal of Mathematics and Mathematics Education Vol 11, No 1 (2021): Journal of Mathematics and Mathematics Education (JMME)
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jmme.v11i1.52744

Abstract

Tourism activities are chain activities that involve various sectors and related institutions. Tourism is one of the fields in the lives of the people of Sragen Regency, which has become one of the priorities in development in recent years. This is based on the local government's awareness that tourism development can support regional income while at the same time increasing the standard of living of people living in tourist areas. For this reason, evaluating the impact of tourism in an area on the socioeconomic conditions of the community is an important thing to know. Sangiran is one of the most complete paleontological sites in Indonesia. Sangiran has also been designated as a cultural heritage by UNESCO on December 5, 1996, with the designation number C.593. The Sangiran site itself is located in Sragen Regency and Karanganyar Regency, Central Java Province. In general, the background of the population in the Sangiran Site area comes from the Javanese ethnic group, who in daily life communicate using the Javanese language. The Sangiran site has been known as an ancient human area from the Pleistocene. Not only storing archaeological wealth, but Sangiran is also very rich in artistic potential, both from prehistoric times and the present. Many things can be enjoyed in Sangiran. Apart from the museum that presents archaeological findings full of meaning, the public can also enjoy the local culture, including traditional arts, traditional ceremonies, local architecture, and folk crafts, adding value to the site. This study aims to determine the profile of tourist visits in the Sangiran Site Area. This study found that the factors that influence the number of visits to the Sangiran Site Area are travel costs, age, gender, and monthly income of respondents related to visiting the Sangiran Site Area. Furthermore, the factors that influence the respondents' willingness to accept ticket offers in the market hypothesis scenario in the Sangiran Site Area are the nominal price of the entrance ticket to a market hypothesis given to respondents, age, gender, monthly income of respondents, education level of respondents, and origin of the respondent.
Perancangan dan Pengembangan Aplikasi Exam System Online dengan Media Camera Yudhanto, Yudho; Triwardana, Muhammad Afkar; Rasyid, Iqbal Farhan; Sulandari, Winita; Utomo, Dimas Prasetyo
IJAI (Indonesian Journal of Applied Informatics) Vol 10, No 1 (2025)
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/ijai.v10i1.107354

Abstract

Abstrak : Perkembangan teknologi informasi telah mendorong terjadinya transformasi digital di berbagai sektor, termasuk dalam penyelenggaraan evaluasi pembelajaran di bidang pendidikan. Meskipun demikian, implementasi sistem ujian berbasis daring masih menghadapi sejumlah permasalahan, seperti keterbatasan pengawasan, keamanan data, serta efisiensi proses penilaian. Penelitian ini bertujuan untuk merancang dan mengembangkan Smart Exam System (SES) sebagai sistem ujian berbasis web yang terintegrasi, mudah digunakan, dan mampu mendukung proses evaluasi secara efektif. Teknologi camera untuk monitoring dan komunikasi user dan pengawas. Implementasi sistem memanfaatkan framework Laravel, Inertia.js–React, serta basis data MySQL. Pengujian sistem dilakukan melalui dua pendekatan, yaitu Black Box Testing untuk menguji kesesuaian fungsi sistem dengan kebutuhan fungsional, serta Technology Acceptance Model (TAM) untuk mengukur tingkat penerimaan pengguna terhadap sistem. Hasil pengujian Black Box menunjukkan bahwa seluruh fitur utama sistem berjalan sesuai dengan spesifikasi yang dirancang. Sementara itu, hasil pengujian TAM menunjukkan nilai rata-rata keseluruhan sebesar 4,41 yang berada pada kategori sangat baik, yang mengindikasikan bahwa sistem dinilai mudah digunakan, bermanfaat, dan memiliki tingkat penerimaan pengguna yang tinggi. Berdasarkan hasil tersebut, dapat disimpulkan bahwa Smart Exam System (SES) layak untuk diimplementasikan sebagai solusi sistem ujian daring yang efektif dan dapat diterima dengan baik di lingkungan pendidikan.==================================================Abstract : The rapid advancement of information technology has driven digital transformation across various sectors, including the implementation of online examination systems in education. However, many existing online examination platforms still face challenges related to supervision limitations, data security, and assessment efficiency. This study aims to design and develop a Smart Exam System (SES) as a web-based examination system that is integrated, user-friendly, and capable of supporting effective evaluation processes. The system was developed using the Agile Scrum methodology with an iterative approach to enable flexibility and continuous improvement. The implementation utilizes the Laravel framework, Inertia.js–React, and a MySQL database. System evaluation was conducted using two approaches: Black Box Testing to verify functional compliance with system requirements, and the Technology Acceptance Model (TAM) to assess user acceptance of the system. The results of Black Box Testing indicate that all core system functionalities operate as intended according to the specified requirements. Meanwhile, the TAM evaluation achieved an overall average score of 4.41, classified as very good, indicating that the system is perceived as easy to use, useful, and well accepted by users. These findings demonstrate that the proposed Smart Exam System (SES) is feasible and suitable for implementation as an effective online examination solution in educational environments.
Rancang Bangun Aplikasi GoHRD Online untuk Start-Up Yudhanto, Yudho; Sulandari, Winita; Hidayat, Taufiqurrakhman Nur; Purnomo, Fendi Aji
IJAI (Indonesian Journal of Applied Informatics) Vol 7, No 2 (2023)
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/ijai.v7i2.68072

Abstract

Abstrak Startup adalah perusahaan rintisan yang belum lama beroperasi. Dengan kata lain, startup artinya perusahaan yang baru masuk atau masih berada pada fase pengembangan atau penelitian untuk terus menemukan pasar meupun mengembangkan produknya. Problem klasik dalam Startup adalah perihal pengelolaan SDM (Sumber Daya Manusia), ini adalah penting sebagai elemen perusahaan dalam mencapai kesuksesan visi misinya. Sering terjadi tumpang tindih tugas dan kewenangan dikarenakan penghematan perusahaan. Selain itu juga proses manajemen SDM dari tugas dan penggajian belum menjadi prioritas karena mengejar pertumbuhan produk yang harus segera diselesaikan. HR (Human Resources) dalam StartUp sangat membutuhkan otomatisasi sehingga bisa berjalan dengan baik tanpa harus memberikan effort yang banyak dikarenakan semua dipusatkan untuk menyelesaikan produk. Aplikasi GoHRD dibuat sebagai solusi mudah dalam mengelola SDM Startup, dibangun dengan menggunakan PHP, MySQL dan Framework PHP. Metode pengembangan yang digunakan adalah Agile Scrum dengan tujuan penyelesaian yang cepat dan singkat. Model pengujian dilakukan dengan teknik Black box, hasilnya adalah dari 30 skenario pengujian mendapatkan 95% berjalan dengan baik sedangkan sisanya memerlukan kustomisasi agar lebih mudah untuk digunakan dan dikenali oleh user dengan baik.====================================================AbstractStartup is a start-up company that has not been operating for a long time. In other words, a startup means a company that has just entered or is still in the development or research phase to continue to find markets and develop its products. The classic problem in startups is the management of HR (Human Resources), this is important as an element of the company in achieving the success of its vision and mission. Overlapping duties and authorities often occur due to company savings. Apart from that, the HR management process of assignments and payroll has not been a priority due to the pursuit of product growth which must be completed immediately. HR (Human Resources) in StartUp really needs automation so that it can run well without having to put in a lot of effort because everything is focused on completing the product. The GoHRD application was created as an easy solution for managing Startup HR, built using PHP, MySQL and the PHP Framework. The development method used is Agile Scrum with the goal of fast and short completion. The testing model was carried out using the Black box technique, the result is that 95% of the 30 test scenarios run well while the rest require customization to make it easier to use and well recognized by the user.
Analisis UI/UX Bisnis Distro dengan Metode Design Thinking and Lean Start-Up Yudhanto, Yudho; Sulandari, Winita; A'La, Fiddin Yusfida; Prayoga, Dedy Eka Timbul; Qisti, Aulia Miftakhul; Utomo, Dimas Prasetyo; Rohman, Saifu 
IJAI (Indonesian Journal of Applied Informatics) Vol 9, No 2 (2025)
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/ijai.v9i2.94801

Abstract

Abstrak : Distro X, merupakan salah satu vendor konveksi dan suvenir. Distro X menghadapi berbagai tantangan, salah satunya adalah kebutuhan untuk meningkatkan visibilitas usaha di dunia digital. Salah satunya adalah memiliki website untuk memperluas jangkauan pasar dan meningkatkan omzet penjualan, serta memudahkan platform pencarian. Dalam perancangan ini menggunakan kombinasi metode Design Thinking dan Lean Startup, yang dikenal efektif untuk desain UI/UX di industri kecil dan menengah. Pendekatan Design Thinking menekankan pemahaman mendalam terhadap kebutuhan pengguna dan memungkinkan terciptanya desain yang berfokus pada user experience. Sementara itu, metode Lean Startup memfasilitasi iterasi cepat melalui prototyping dan validasi berulang, sehingga menghasilkan solusi yang lebih adaptif dan relevan dengan kebutuhan spesifik industri kecil dan menengah yang memiliki sumber daya terbatas. Kombinasi kedua pendekatan ini terbukti mampu menghasilkan desain UI/UX yang tidak hanya user-friendly, tetapi juga efisien dalam hal pengembangan dan biaya. Proses perancangan ini melibatkan tujuh tahapan, yaitu emphatize, define, ideate, prototype, test, learn, dan release. Setiap tahapan dilakukan dengan tujuan mendapatkan pemahaman mengenai kebutuhan pengguna, mengembangkan ide-ide inovatif, serta menguji desain secara langsung. Hasil dari tahapan tersebut adalah sebuah desain UI/UX website yang siap untuk dikembangkan oleh developer. Desain ini diwujudkan dalam bentuk prototype simulasi website yang memudahkan visualisasi sebelum implementasi penuh. Berdasarkan hasil usability test, desain UI/UX ini dinyatakan layak dengan tingkat kelayakan sebesar 80,2%. Secara detail hasil ini merupakan rerata dari faktor Learnability 73.4%, Flexibility 76.5%, Effectiveness 82.16%, Attitude 88.6%. Persentase ini menunjukkan bahwa desain yang dihasilkan telah memenuhi standar kelayakan usability yang baik, mengingat standar rata-rata tingkat kelayakan usability yang diterima secara umum adalah sekitar 70-75%. Dengan demikian, hasil ini menunjukkan bahwa desain UI/UX DIstro X berada di atas rata-rata, sehingga layak untuk dikembangkan lebih lanjut. Hal ini juga mengindikasikan bahwa pendekatan kombinasi Design Thinking dan Lean Startup memberikan kontribusi signifikan dalam menghasilkan desain yang efektif dan memenuhi ekspektasi pengguna, khususnya di industri kecil dan menengah.====================================================Abstract : Distro X is a vendor specializing in garment and souvenir production. Distro X faces various challenges, including the need to enhance its digital visibility. One of the key initiatives is to establish a website to expand market reach, boost sales, and facilitate discoverability through search engines. The design process for the website employed a combination of Design Thinking and Lean Startup methodologies, which are recognized for their effectiveness in UI/UX design within small and medium enterprises (SMEs). The Design Thinking approach emphasizes a deep understanding of user needs and allows for the creation of user-centered designs, while the Lean Startup methodology facilitates rapid iteration through prototyping and repeated validation, leading to more adaptive and relevant solutions tailored to the specific needs of SMEs with limited resources.The combination of these two approaches has proven effective in producing UI/UX designs that are not only user-friendly but also efficient in terms of development and cost. The design process involved seven stages: empathize, define, ideate, prototype, test, learn, and release. Each stage was undertaken with the aim of gaining a better understanding of user needs, developing innovative ideas, and directly testing the design. The outcome of these stages was a UI/UX design for the website, ready to be developed by the developer. This design was materialized in the form of a simulated prototype to facilitate visualization prior to full implementation. Based on the usability test results, the UI/UX design was deemed feasible with an overall usability score of 80.2%. Specifically, this result represents the average of the following factors: Learnability (73.4%), Flexibility (76.5%), Effectiveness (82.16%), and Attitude (88.6%). This percentage indicates that the produced design has met the standard for good usability, considering the general benchmark for usability acceptance ranges between 70-75%. Thus, these results show that the UI/UX design for DIstro X surpasses the average, making it suitable for further development. This also indicates that the combination of Design Thinking and Lean Startup approaches contributes significantly to generating an effective design that meets user expectations, particularly in small and medium industries.
Co-Authors A'la, Fiddin Yusfida Adi Wicaksono, Nanda Adigama Tri Nugraha Aji Susanto Ardiyani, Faradilla Fadlila Nurwanda Febrianti, Tri Kartika Fendi Aji Purnomo Fhadilla, Nahdatul Hapsari, Riskhia Hidayat, Taufiqurrakhman Nur Husna Afanyn Khoirunissa Ilahi, Esa Permata Sari Putri Indra Raditya , Dionisius Irwan Susanto Irwan Susanto Isnaini, Bayutama Isnandar Slamet Isnandar Slamet, Isnandar Kadar, Jimmy Abdel Kamisan, Nur Arina Bazilah Kayyisa, Alfien Diva Lee, Muhammad Hisyam Marita Saptyani, Marita Mika Asrini Neyun, Ignasia N.G. Noven, Michela Sheryl Nugraha, Titis Jati Pangadi Pangadi Pardede, Hilman Ferdinandus Pramesti, Arsita Anggraeni pratiwi, hasih Prayoga, Dedy Eka Timbul Qisti, Aulia Miftakhul Rasyid, Iqbal Farhan Respatiwulan, Respatiwulan Rohman, Saifu  Santoso Budi Wiyono Setiawan, Crisma Devika Sri Subanti Sucipto, Christy Sheldy Sufia Nur Janah Sugianto Sugianto Sugiyanto - Susilotomoa, Dhestahendra Citra Triwardana, Muhammad Afkar Utomo, Dimas Prasetyo Wati, Rosita Kurnia Wijayanti, Monica Dini Yudho Yudhanto, Yudho Yuliana Susanti Yuliana Susanti, Yuliana Zakya Reyhana Zukhronah, Etik