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Yundari, Yundari
Jurusan Matematika FMIPA Universtas Tanjungpura
Agriculture, Biological Sciences & Forestry Humanities Astronomy Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mathematics Mechanical Engineering Physics Public Health Social Sciences Transportation Other

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Journal : Media Statistika

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THE APPLICATION OF THE SEMIPARAMETRIC GSTAR MODEL IN DETERMINING GAMMA-RAY LOG DATA ON SOIL LAYERS Yundari, Yundari; Martha, Shantika
MEDIA STATISTIKA Vol 14, No 2 (2021): Media Statistika
Publisher : Department of Statistics, Faculty of Science and Mathematics, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/medstat.14.2.108-117

Abstract

This research examines the semiparametric Generalized Space-Time Autoregressive (GSTAR) spacetime modeling and determines its spatial weight. In general, the spatial weights used are uniform, binary weights, and based on the distance, the result is a fixed weight. The GSTAR model is a stochastic model that takes into account its random variables. Thus, it is necessary to study the random spatial weights. This study introduced a new method to estimate the observed value of the GSTAR model semiparametric with a uniform kernel. The data involved the Gamma Ray (GR) log data on four coal drill holes. The semiparametric GSTAR modeling aimed to predict the amount of log GR in the unobserved soil layer based on the observation data information on the layer above it and its surrounding location. The results revealed that semiparametric GSTAR modeling could predict the presence of coal seams and their thickness of drill holes. The results also highlight the validity test on the out-sample data that the error in each borehole results in a small error. In addition, the error tends to approach the actual observed value at a depth of 1 meter down.
Co-Authors Adrian, Ferry Ahmad Yani T Alexander Ananda, Adelia Angraini, Wanda Aprilianti, Aulia Aprizkiyandari, Siti Ariani, Prisilia Arizal, Arizal Asyrad, Adam Ayu Lestari Ayu Sri Utami Bambang Poniman Barita Riana Sitours Bayu Prihandono Brella Glysentia Vilgalita Chintya, Yuni Daniel Happy Putra Daska, Hipin Dea Rizki Darmawanti Dede Suratman Deni Winda Sari Desi Desi Ditanti Putri Shofia Eka Febrianti, Eka Eligia Helvianti Tri Lina P Elishabet Yohana Enis Rahayu Erlando Erlando Ervina Febyolga Evangelista, Gitta Evi Novian Evi Noviani Evy Sulistianingsih Fajria, Intan Luthfiani Fansiskus Fran Fikadila, Lisa Firhan Januardi Firmansyah, Dimas Fran, Fransiskus Fransiskus Fran Fransiskus Fran Hamdani Hamdani Hanssen, Calvin Helmi Helmi Helmi Helmi Helmi Helmi Helmi Hendra Perdana Hengki, Marius Henny Priandini Amalia Huda, Nur'ainul Miftahul HUDA, NUR’AINUL MIFTAHUL Huda, Nur’ainul Miftahul Ikbal Muhaimin Jonathan, Ryan Juwita, Dia Prima Laksono Trisnantoro Lauren, Nover Laurens Paskhia Dirda Rusanditia Lina Astuti Mariatul Kiftiah Martha, Shantika Meisita, Cheril Meliana Pasaribu Melinda Mareta Sari Mohamad Rif'at Mudinillah, Adam Muhammad Ilyas Mujiarti, Eka May Muslimah (F54210032) Nadia Putri Kurniawati Neno Juli Triami Neva Satyahadewi Nilamsari Kusumastuti Ningrum, Runi Aisyah Diyah Novia Kristefany Kabang Nurfadilah, Kori’ah NURFITRI IMRO’AH Nurfitri Im’roah Nurliantika, Nurliantika NUR’AINUL MIFTAHUL HUDA Pranata Anggi Priyatna, Tegar Rama Puspita, Urfila Dian Putra, Fajar Rahmana Putri Romanda Rachmawati, Febby Rahmah, Mhaulia Ramadhan, Rahul Ramadhanti, Tasya Redika Rayhannisa, Rayhannisa Rif'at, Mohammad Rifatullah, Rohit Riski Apriadi Rivaldi, Syahrul Rizki, Setyo Wira Ryan Jonathan Safitri, Fauziah Sasqia Aklysta Antaristi Setyo Wira Rizki Setyo Wira Rizki Shantika Martha Shantika Martha Silvia, Elma Silvy Heriyanti Suryani Suryani Takuan, Julianus Tambunan, Ayu Oktavia Tamtama, Ray Udjianna Sekteria Pasaribu Utriweni Mukhaiyar Venti, Monalisa Wele, Bruno Sala Winanda Epriyanti Yudhi Yulis Jamiah Zada Almira Zubaidah Zubaidah