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Journal : BERKALA FISIKA

INVERSI LINIER LEASTSQUARE DENGAN MATLAB ( Studi Kasus Model Gravitasi Bola Berlapis) Nurwidyanto, Irham; Setiawan, Ari
BERKALA FISIKA Vol 14, No 3 (2011): Berkala Fisika
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (289.088 KB)

Abstract

The linear  least square Inversion have been made with matlab8 for a case study of layered ball with the aim to study the response of the gravitational field of a layered ball.The gravitational field of layered ball formulation described later the value  is calculated by programming in matlab. As the validation data is computed on the surface of the earth'sgravitational field with a case of six layers with different density and radius. The value aresuitable  to the real slate. After the results are appropriate, the results of  programming was made is used to calculate the gravitation field  of another layered ball object, the data is then used assynthetic data (considered as a data field) which is an inversion of input data on the program aremade.The results obtained in this modeling can be concluded that there are ambiguity from theinversion results, which means that the parameters which be obtained from the invertion methodare  very different to the riil parameter if not given early predictive value as the limit of theexpected value. By providing a limit value (the value of the initial estimate) the expected results ofthe inverse can provide results that correspond (nearly) true value.Key words: Inversion, Linier leastquare, layered ball
PEMODELAN ANOMALI GRAVITASI SESAR DENGAN PENDEKATAN MODEL SHEET (MODELLING GRAVITY ANOMALIES OF FAULT BY SHEET MODEL APPROACH) Nurwidyanto, M Irham; Setiawan, Ari
BERKALA FISIKA Vol 14, No 4 (2011): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

AbstractThe modelling gravity anomaly of fault model with a model sheet approach with the aim to study the response of gravity anomalies of faults was done.Modelling is done by modelling approaches bedding with a thickness t and density contrastwith surrounding Δρ. The  gravity anomaly at a point are formulated and  the calculation andvisualization program created in matlab8RS. From the modelling is made it can be concluded that the fault position is generally locatedbetween the gravity anomaly minimum and maximum gravity anomaly. When thetypes of fault arevertical normal fault then the fault position precisely located on the horizontal gradient  maximumvalue, whereas when the fault are not vertical, the location of fault are  to be near (around) themaximum horizontal gradient.Key words: modelling, gravity anomalies, faults, model sheets.
Co-Authors ., Susan A.A. Ketut Agung Cahyawan W Ab Ghani, Hawa Husna Abdul Basith Abdullah Umar, Abdullah Achmad Baidowi, Achmad Ade, Kornelius Adi Suyatno Adiguna, Muhammad Ekky Satria Adnan, Nor Syamimi Mohamed AF, Oca Fernandes Agoes Santoso Agus Subekti Agust, Krisit Ahmad Kholil Akbar Al Masjid Aksaronas, Zidan Ashri Amalia Nurma Dewi Amsori M Das Anderson, Ganda Andrian, Dedek Aprijal, Aprijal Apriyanto, Mulono Ariwiguna, Wily Arum Putri Rahayu Aryono Adhi, Aryono As'ad, Ihwana Asih, Eka Kurnia Assa'idah, Putri Arina ASTIKA, RIA Astuti, Nuryani Dwi Aulia, Qisthina Awalia, Sofi Nur Ayres, Mark Ayu Putri Aziz, Mohd Kasturi Nor Abd Azmi, Zul Bimansyah, Willyam Budiman Budiman Cahyo, Muhammad Fiqih Nur Cendana, Wiputra Chandra, Ronny Hernawan Chayati, Nurul Dardjito, Hanandyo Darmadi, Djarot Bangun Darwis, Nurizah Binti Mohamed Das, Amsori M. Daulay, Dicky Edwar Diah Indriani Dian Purnamasari Dian, Saskia Eka Didik Rinan Sumekto Diharjo, Diana Hafilda Digdho Djarot B. Darmadi, Djarot B. Dona Setya Dwiretnani, Annisaa Dwiyati, Siska Titik Edi Kadarsa, Edi Eka Setiawati Elroy, Mikha Elvira handayani Endi Adriansyah Enggar Kartikasari, Enggar Epi Supriyani Siregar Evi Susilawati Fakhrul Rozi Yamali Farida Agus Setiawati fatimah Fatimah Fatin Nadifa Tarigan Firdaus, Muhamad Yusuf Fitri Amalia Gary, Joshua Gunarto, Frendy Z. Hadmoko D S, Hadmoko D Hamzari Hamzari Hanna, Tabitha Harsono, Muhamad Sarbani Hartono, Arif Harun, Makmur Heny Setyawati Herawan, Budi Heri Retnawati Hidayatullah, Rizqy Hiden Hiden Hilmanto, Malvin Hurairah, Abi Husain Umar Ika Dyah Kumalasari Ika Purnama Sari Ikrarini, Estri Oktarena Imas, Cindy Alfianuri Indriana, Rina Dwi Irham Nurwidyanto Istiyarni, Istiyarni K, Antonius Candra Khairas, Eri Ester Khofifah, Nor Khosiyono, Banun Havifah Cahyo Kinley Aritonang Kirbani S B, Kirbani S Kirbani Sri Brotopuspito Kristina, Sonna Kristy, Kristy Kusuma Chandra Kirana, Kusuma Chandra Kusumawardhani, Ratih Laxmi, Laxmi Lukman Handoko Lukman Nasution Mahatwan, Dian Mami Hajaroh Marcelina, Gita Vegi Marsum Marsum Martadinata, Sanjaya Marzuki Marzuki Maulida, Minati Melawaty Agustien, Melawaty Moh. Safii Mualim, Rahmat Muflihah Isnawati Muhammad Ali Gunawan Muhammad Fajri Mulia, Citra Muljo, Ariyani Muryadin, Muryadin Muttaqie, Teguh Ndruru, Ambrosius Fernus Nella, Mietha Noer, Zakiah Noor, Fariz Novi Laura Indrayani, Novi Laura Nurul Priyantari Pakpahan, Eka Kurnia Asih Pardimin Pardimin Pardimin, Pardimin Pratama, Danang Budi Pratama, Rizki R Prayoga, Arif Priono, Joko Puji Hastuti Purwandari, Elce Rachman, Rani Auliawati Rahmatullah, Muhammad Imam Ramadhan, Aldo Reghan Ramadhani, Iqbal Ratna Sari, Dwi Rauza Sukma Rita Rezvani, Rifki Riananda, Agif Rifqi Sufra Riyanto Sigit, Riyanto Rodhiyah, Syifa Robby Rokhana, Rika Rolls, Nicola Rosid, Muhammad Alfan Roslaini, Roslaini Rukmini Rukmini Rulhendri Rulhendri Saefudin, Yusuf Saputro, M. Elan Sari, Hindun Andan Sarim, Sandria Setiawati, Marla Setiyobudi, Nanang Sherly Rosa Anggraeni Sihombing, Roy Freddy Silvia Devi Eka Putri Sinulingga, Timothy Oktavianus Siregar, Januar Parlaungan Sitepu, Teguh E. N. Sitepu, Teguh Ersada Natail Siti Maesaroh Siti Nurhayati Soenantyo, Tarcisius Aris Sri Murlianti Sri Panca Setyawati Sri Widiyati, Sri Sufiyanto, Muhammad Imam Suhaila Husna Samosir Suhendra Suhendra Sumarwan, Edi Suparmin Suparmin Supriyadi Supriyadi Suryanto, Wiwit SUSANTO SUSANTO Sutarman Syaefudin, Eko Arif Syafriani Syafriani, Syafriani Syamsul Hadi Tapotubun, Alfonsina M. Tengku Riza Zarzani N Thoriq, Anugrah Trisnowati Josiah Tyas, Rizqa Ramadhaning Umi Fatonah Uslan Utami, Lastuti Utomo, Anggoro Prasetyo Valiant, Vincent Vina Sari Yosephine Wahyudi Wahyudi Wahyudi, Danial Wahyudin Wahyudin Wanto, Endra Wardani, Ken Ratri Wari Dony Wijaya Kusuma Rahadi, Cakra wiwit S, wiwit Yahya, Indra Nur Yohanes Setiawan Yuldashev, Azim Abdurakhmanovich YULI ASTUTI, YULI ASTUTI Yuli Prihatni Yulian Findawati Yuliyanti, Erma Yunitasari, Cindy Fatma Zarochman, Zarochman