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All Journal The Journal of Experimental Life Sciences (JELS) Jurnal Sosial Ekonomi Pertanian CAUCHY: Jurnal Matematika Murni dan Aplikasi Jurnal Mahasiswa Statistik Journal of Innovation and Applied Technology Jurnal Teknologi Informasi dan Ilmu Komputer JURNAL ILMIAH MATEMATIKA DAN TERAPAN PERFORMA : Media Ilmiah Teknik Industri BAREKENG: Jurnal Ilmu Matematika dan Terapan Proceeding Simposium Nasional Kelautan dan Perikanan JTAM (Jurnal Teori dan Aplikasi Matematika) Jurnal Pertanian Agros Zero : Jurnal Sains, Matematika, dan Terapan ComTech: Computer, Mathematics and Engineering Applications Jurnal ABDINUS : Jurnal Pengabdian Nusantara Inferensi MATHunesa: Jurnal Ilmiah Matematika Pakem : Jurnal Pengabdian Kepada Masyarakat Prosiding Seminar Nasional Official Statistics ABDI UNISAP: Jurnal Pengabdian Kepada Masyarakat Journal of Community Empowerment International Journal of Informatics Engineering and Computing
Atiek Iriany
Universitas Brawijaya
Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Mechanical Engineering Medicine & Pharmacology Neuroscience Physics Public Health Social Sciences Transportation Other

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ANALISIS SPASIAL TEMPORAL INDEKS KETAHANAN PANGAN MENGGUNAKAN GEOGRAPHICALLY TEMPORALLY WEIGHTED REGRESSION DAN KLASTER FUZZY DI NUSA TENGGARA TIMUR Iriany, Atiek; Ayunda Sovia, Nabila; Ngabu, Wigbertus; Ariyanto, Danang
MATHunesa: Jurnal Ilmiah Matematika Vol. 13 No. 3 (2025)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/mathunesa.v13n3.p9-17

Abstract

Ketahanan pangan di Indonesia masih menghadapi tantangan serius akibat ketimpangan sosial-ekonomi dan infrastruktur antarwilayah yang berfluktuasi antarperiode. Provinsi Nusa Tenggara Timur (NTT) menjadi contoh nyata, dengan capaian Indeks Ketahanan Pangan (IKP) antar kabupaten/kota menunjukkan variasi signifikan pada periode 2018–2022. Penelitian ini bertujuan menganalisis pengaruh faktor sosial-ekonomi dan infrastruktur terhadap IKP dengan mempertimbangkan heterogenitas spasial-temporal. Metode yang digunakan adalah Geographically and Temporally Weighted Regression (GTWR) untuk menangkap dinamika pengaruh variabel pada dimensi ruang dan waktu, serta Fuzzy C-Means untuk mengelompokkan wilayah berdasarkan pola pembangunan. Hasil penelitian menunjukkan bahwa Angka Partisipasi Sekolah (APS) berpengaruh negatif signifikan terhadap IKP, PDRB per kapita berpengaruh positif meskipun terbatas, akses air minum layak berfluktuasi, sedangkan rasio elektrifikasi konsisten berpengaruh positif signifikan. Analisis Fuzzy C-Means menghasilkan tiga klaster utama: (1) wilayah dengan APS sedang dan IKP relatif tinggi, (2) wilayah dengan APS tinggi namun IKP menengah hingga rendah, dan (3) wilayah dengan APS rendah dan IKP rendah yang merepresentasikan daerah tertinggal. Temuan ini menegaskan bahwa pembangunan di NTT masih menghadapi ketimpangan spasial-temporal, sehingga kebijakan tidak dapat bersifat seragam melainkan harus disesuaikan dengan karakteristik lokal.
ALGORITMA DBSCAN DAN SHARED NEAREST NEIGHBOR DALAM PENGELOMPOKKAN SPASIAL PRODUKTIVITAS JERUK SIAM DI INDONESIA Oktavia , Nur Sofi Sely; Iriany, Atiek; Astuti, Ani Budi
MATHunesa: Jurnal Ilmiah Matematika Vol. 13 No. 3 (2025)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/mathunesa.v13n3.p45-58

Abstract

Penerapan dua algoritma analisis density-based cluster, yaitu DBSCAN dan Shared Nearest Neighbor (SNN), dengan integrasi Principal Component Analysis (PCA) pada Produktivitas Jeruk Siam di Indonesia tahun 2023. Variabel yang digunakan terdiri dari 7 indikator jeruk siam, yaitu produktivitas (Ton/Pohon), produksi (Ton), pertumbuhan produksi (%), luas panen (Hektar), rata-rata suhu bulanan (°C), rata-rata kelembaban bulanan (%), dan rata-rata curah hujan bulanan (mm). Data yang digunakan merupakan data sekunder tahun 2023 yang diperoleh melalui publikasi BPS dan Kementerian Pertanian RI. Hasil penelitian menunjukkan bahwa SNN memiliki stabilitas pengelompokan yang lebih baik dibandingkan DBSCAN, dan penerapan PCA meningkatkan kinerja DBSCAN dan SNN. Model terbaik diperoleh dari SNN pada data PCA dengan tiga komponen utama (PC3), dengan Silhouette Coefficient sebesar 0,872. Algoritma ini menghasilkan 3 cluster, yaitu Cluster 0 mencakup 32 provinsi dengan skala produksi besar dan kondisi agroklimat yang beragam, Cluster 1 terdiri dari 3 provinsi dengan produksi kecil namun pertumbuhan sangat tinggi, sehingga terpisah dari sentra produksi utama, dan Cluster 2 mencakup 3 provinsi yang memiliki karakteristik lokal unik dengan skala produksi rendah hingga nol.
Geographically and Temporally Weighted Regression Modeling in Analyzing Factors Affecting the Spread of Dengue Fever in Malang Indrayani, Fahmi; Pramoedyo, Henny; Iriany, Atiek
The Journal of Experimental Life Science Vol. 8 No. 2 (2018)
Publisher : Graduate School, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1175.267 KB) | DOI: 10.21776/ub.jels.2018.008.02.01

Abstract

Geographically and Temporally weighted regression (GTWR) modeling has been developed to evaluate spatial heterogeneity and temporal heterogeneity in factors influencing the spread of dengue fever in Malang city. By using the monthly data in 2012-2015 as the temporal unit of each urban village in Malang and village is considered as a spatial unit. GTWR model is compared with the GWR model using several statistical criteria. GTWR model shows that the relationship between dengue incidence with population density and monthly average temperature significantly affects each Village in Malang.Keywords : DHF, GTWR, Spatiotemporal Pattern
Evaluating Double Resampling through Simulation and Application in Semiparametric Truncated Spline for Waste Economic Value Kamelia Hidayat; Adji Achmad Rinaldo Fernandes; Atiek Iriany; Moh. Zhafran Hidayatulloh
ZERO: Jurnal Sains, Matematika dan Terapan Vol 9, No 3 (2025): Zero: Jurnal Sains Matematika dan Terapan
Publisher : UIN Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30829/zero.v9i3.26773

Abstract

This study developed a double resampling procedure as a method for estimating standard error in truncated spline semiparametric path modeling, given that standard error cannot be obtained analytically. Primary data were collected from 100 respondents through a Likert scale questionnaire and analyzed using a path structure involving Facility and Infrastructure Quality and Waste Bank Participation have a significantly positive effect on 3R-Based Waste Management Practices and the Waste Economic Value . The modeling process involved selecting knots, estimating spline functions, and evaluating double resampling performance through simulation studies. The results showed that and had a significant positive effect on and , while the relationship between and was negative before and after the 21% threshold. The simulation study shows that the Jackknife-Bootstrap method produces lower standard errors and bias, while the Bootstrap-Jackknife method is more stable at very small sample size. These findings confirm the effectiveness of double resampling.
Penerapan Bagan Kendali Multivariat Robust Pada Data Produksi Pupuk ZK PT Petrokimia Gresik Darmanto, Darmanto; Kusdarwati, Heni; Iriany, Atiek; Setiawan, Iwan; Ashari, Ayu Aisyah
Performa: Media Ilmiah Teknik Industri Vol 17, No 1 (2018): PERFORMA Vol. 17, No 1 Maret 2018
Publisher : Industrial Engineering, Faculty of Engineering, Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (306.19 KB) | DOI: 10.20961/performa.17.1.18514

Abstract

PT Petrokimia Gresik is the most complete fertilizer producer in Indonesia and one of its production is ZK fertilizer. There are five measurable chemicals that correlate to form ZK fertilizer ie H2O, H2SO4, K2O, SO3 and Cl-. ZK fertilizer monitoring process has not been statistically done by PT Petrokimia Gresik, either univariat or multivariate. Since ZK fertilizer is composed of five chemicals that correlate each other, a multivariate control chart is used. RMCD is one of the robust parameter estimation methods for outlier data. The average vector and variance-covariance matrix derived from the RMCD method is used to calculate the statistics on the multivariate control chart. Therefore, the robust control chart is more sensitive to detecting a shift in production processes compared to the classical ones. The data used in Phase I is daily data per January 1 - April 30, 2017, while Phase II data used is daily data as of May 1 - July 15, 2017. The results of the control chart analysis in Phase I shows that the production process has not been controlled statistically analysis of cause-effect diagrams. Furthermore, the control chart limits in Phase I that have been stable after the repair are used for Phase II production data. The result of the control chart analysis in Phase II shows that the production process has shifted. This can be known by the number of points that out of control.
Co-Authors Achmad Efendi Adji Achmad Rinaldo Fernandes Agung Sugeng Widodo Agus Dwi Sulistyono, Agus Dwi Alim, Viky Iqbal Azizul Amanda, Devi Veda Ani Budi Astuti Aniek Iriany Arditama Putra Rochmanullah Arianto, Danang Arifin Noor Sugiharto Aris Subagiyo Asaliontin, Lisa Ashari, Ayu Aisyah Ayunda Sovia, Nabila Bambang Dwi Argo Bestari Archita Safitri Budi Astuti, Ani Cecep Kusmana Chairunissa, Abela Danang Ariyanto Darmanto Darmanto David Forgenie Dewi, Anggi Seftia Dhanny Septimawan Sutopo Elok Waziiroh Eni Sumarminingsih Faddli Lindra Wibowo Fernandes, Adji Fernandes, Adji Achmad Rinaldo Firdaus, Cahyani Jannah Fudianita, Citra Hamdan, Rosita Haneinanda Junianto, Fachira Hartawati, Hartawati Heni Kusdarwati Henny Pramoedyo Hidayat, Kamelia Hidayatulloh, Moh. Zhafran Indrayani, Fahmi Iwan Setiawan Junianto, Fachira Haneinanda Kamelia Hidayat Khoiril Anam, Khoiril Maghfiro, Maulidya Maghfiro, Maulidya Maisaroh, Ulfah Marhen Andan Prasetyo Mellysa Isnaini Moh. Zhafran Hidayatulloh Muhamad Firdaus Muhamad Ridwan Ni Wayan Surya Wardhani NI WAYAN SURYA WARDHANI Nikmatul Khoiriyah Novi Nur Aini Novi Nur Aini, Novi Nur Nugroho, Arief Budi Nugroho, Salma Fitri Nur Silviyah Rahmi Oktavia , Nur Sofi Sely Ola, Petrus Kanisius Pramaningrum, Dea Saraswati Prayudi Lestantyo Putra, Arditama Putri, Henida Ratna Ayu Rahma Fitriani Ridlo, Mahmuddin Rinaldo Fernandes, Adji Achmad Riza, Sativandi Rosyida, Diana Rudiat Sekarsari, Cindy Sepriadi, Hanifa Solimun Solimun Solimun Solimun, Solimun Suci Astutik Sugiarto S Sukamto, Ika Sumiyarsi Suryawardhani, Ni Wayan Sutopo, Dhanny Septimawan Ullah, Mohammad Ohid Utomo, Candra Rezzining Wulat Sariro Weni Waego Hadi Nugroho Wardhani, Ni Wayan Surya Wigbertus Ngabu Yuliana, Mila