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All Journal Jurnal Pendidikan Teknologi dan Kejuruan Sainstek Jupe-Jurnal Pendidikan Ekonomi Pendidikan Administrasi Perkantoran Dinamika Pendidikan Jurnal Pengkajian dan Pengembangan Teknologi Pertanian Indonesian Journal of Geospatial Journal of Engineering and Technological Sciences Indonesian Journal of Tropical and Infectious Disease ELINVO (Electronics, Informatics, and Vocational Education) Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) Animal Production : Indonesian Journal of Animal Production INDONESIAN JOURNAL OF APPLIED PHYSICS Majalah Farmaseutik Jurnal Riset Ekonomi dan Bisnis Khadimul Ummah Journal of Social Dedication Jurnal Penelitian Kelapa Sawit JPP IPTEK (Jurnal Pengabdian dan Penerapan IPTEK) Jurnal Riset Inspirasi Manajemen dan Kewirausahaan MIND (Multimedia Artificial Intelligent Networking Database) Journal Jurnal Masyarakat Merdeka (JMM) Jurnal Jamu Indonesia Jurnal Administrasi dan Manajemen Cakrawala Management Business Journal Journal of Issues in Midwifery Indonesian Journal of Clinical Pathology and Medical Laboratory (IJCPML) Jurnal Ilmiah Edunomika (JIE) Management Studies and Entrepreneurship Journal (MSEJ) Jurnal Ilmiah Manajemen Kesatuan Budimas : Jurnal Pengabdian Masyarakat JEKPEND Jurnal Ekonomi dan Pendidikan JURNAL CAPITAL : Kebijakan Ekonomi, Manajemen dan Akuntansi Swara Patra : Majalah Ilmiah PPSDM Migas Information Science and Library Jurnal Manajemen dan Profesional Sustainable Business Journal Jurnal Pengabdian Kepada Masyarakat Radisi Frontier Agribisnis (Frontbiz) Kesmas: Jurnal Kesehatan Masyarakat Nasional (National Public Health Journal)
Djoko Santoso
Research Group of Geophysical Science and Engineering, Faculty of Earth Sciences and Mineral, Institut Teknologi Bandung, Ganesha 10, Bandung 40132, West Java, INDONESIA
Religion Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Neuroscience Nursing Physics Public Health Social Sciences Veterinary Other

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Journal : Journal of Engineering and Technological Sciences

 1 
Multi-dimensional Inversion Modeling of Surface Nuclear Magnetic Resonance (SNMR) Data for Groundwater Exploration Warsa, W.; Grandis, Hendra; Parnadi, Wahyudi W.; Santoso, Djoko
Journal of Engineering and Technological Sciences Vol 46, No 2 (2014)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1413.731 KB) | DOI: 10.5614/j.eng.technol.sci.2014.46.2.1

Abstract

Groundwater is an important economic source of water supply for drinking water and irrigation water for agriculture. Surface nuclear magnetic resonance (SNMR) sounding is a relatively new geophysical method that can be used to determine the presence of culturally and economically important substances, such as subsurface water or hydrocarbon distribution. SNMR sounding allows the determination of water content and pore size distribution directly from the surface. The SNMR method is performed by stimulating an alternating current pulse through an antenna at the surface in order to confirm the existence of water in the subsurface. This paper reports the development of a 3-D forward modeling code for SNMR amplitudes and decay times, after which an improved 2-D and 3-D inversion algorithm is investigated, consisting of schemes for regularizing model parameterization. After briefly reviewing inversion schemes generally used in geophysics, the special properties of SNMR or magnetic resonance sounding (MRS) inversion are evaluated. We present an extension of MRS to magnetic resonance tomography (MRT), i.e. an extension for 2-D and 3-D investigation, and the appropriate inversions.
Designing a Genetic Algorithm for Efficient Calculation in Time-Lapse Gravity Inversion Wahyudi, Eko Januari; Santoso, Djoko; Kadir, Wawan Gunawan Abdul; Alawiyah, Susanti
Journal of Engineering and Technological Sciences Vol 46, No 1 (2014)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (595.019 KB) | DOI: 10.5614/j.eng.technol.sci.2014.46.1.4

Abstract

As an advanced application of soft computation in the oil and gas industry, genetic algorithms (GA) can contribute to geophysical inversion problems in order to achieve better results and efficiency in the computational process. Time-lapse gravity responses to pore-fluid density changes can be modeled to provide the density distribution in the subsurface. This paper discusses the progress of work in inverse modeling of time-lapse gravity data using value encoding with alphabet formulation. The alphabet formulation was designed to provide the solution for positive and negative density change with respect to a reference value (0 gr/cc). The inversion was computed using a genetic algorithm as the optimization method. Working with genetic algorithms, time-intensive computational processes are a challenge, so the algorithm was designed in steps through the evaluation of a GA operator performance test. The performances of several combinations of GA operators (selection, crossover, mutation, and replacement) were tested with a synthetic model of a single-layer reservoir. Sharp boundaries of density changes in the reservoir layer were derived from interpretation of the averaged calculation of several model samples. Analysis showed that the combination of stochastic universal sample–multipoint crossover–quenched simulated annealing per generation–no duplicity achieved the most promising results.
Designing a Genetic Algorithm for Efficient Calculation in Time-Lapse Gravity Inversion Eko Januari Wahyudi; Djoko Santoso; Wawan Gunawan Abdul Kadir; Susanti Alawiyah
Journal of Engineering and Technological Sciences Vol. 46 No. 1 (2014)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2014.46.1.4

Abstract

As an advanced application of soft computation in the oil and gas industry, genetic algorithms (GA) can contribute to geophysical inversion problems in order to achieve better results and efficiency in the computational process. Time-lapse gravity responses to pore-fluid density changes can be modeled to provide the density distribution in the subsurface. This paper discusses the progress of work in inverse modeling of time-lapse gravity data using value encoding with alphabet formulation. The alphabet formulation was designed to provide the solution for positive and negative density change with respect to a reference value (0 gr/cc). The inversion was computed using a genetic algorithm as the optimization method. Working with genetic algorithms, time-intensive computational processes are a challenge, so the algorithm was designed in steps through the evaluation of a GA operator performance test. The performances of several combinations of GA operators (selection, crossover, mutation, and replacement) were tested with a synthetic model of a single-layer reservoir. Sharp boundaries of density changes in the reservoir layer were derived from interpretation of the averaged calculation of several model samples. Analysis showed that the combination of stochastic universal sample"“multipoint crossover"“quenched simulated annealing per generation"“no duplicity achieved the most promising results.
Multi-dimensional Inversion Modeling of Surface Nuclear Magnetic Resonance (SNMR) Data for Groundwater Exploration W. Warsa; Hendra Grandis; Wahyudi W. Parnadi; Djoko Santoso
Journal of Engineering and Technological Sciences Vol. 46 No. 2 (2014)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2014.46.2.1

Abstract

Groundwater is an important economic source of water supply for drinking water and irrigation water for agriculture. Surface nuclear magnetic resonance (SNMR) sounding is a relatively new geophysical method that can be used to determine the presence of culturally and economically important substances, such as subsurface water or hydrocarbon distribution. SNMR sounding allows the determination of water content and pore size distribution directly from the surface. The SNMR method is performed by stimulating an alternating current pulse through an antenna at the surface in order to confirm the existence of water in the subsurface. This paper reports the development of a 3-D forward modeling code for SNMR amplitudes and decay times, after which an improved 2-D and 3-D inversion algorithm is investigated, consisting of schemes for regularizing model parameterization. After briefly reviewing inversion schemes generally used in geophysics, the special properties of SNMR or magnetic resonance sounding (MRS) inversion are evaluated. We present an extension of MRS to magnetic resonance tomography (MRT), i.e. an extension for 2-D and 3-D investigation, and the appropriate inversions.
Co-Authors Achmad Yusup, Ciptadi Adi Siswandari, Nur Aditia Wardana, Aditia Aditiawardana Aditiawardana, Aditiawardana Adriyanto, Andhy Tri Agung Dwi Indrawan Agus Laesanpura AHMAD RIDUAN Anang Budikarso, Anang Andre Noevi Rahmanto Annisa Rahmawati Anton Subarno Aprih Santoso Ardityo R Ardhany, Ardityo R Arinana Arinana Artaria Tjempakasari, Artaria Aryandhi, Erki Aryati Aryati Auromiqo, Candra Barri, Fatkhi Bastin Fitriatus Hasanah Bekti Wulandari Bonita Destiana Budi Sulistijo Cavalier, Etienne Chamdan, Muhammad Umar Chandra Irwanadi Mohani, Chandra Irwanadi Chandra Irwanadi, Chandra chieko Hamada, chieko D Ningsih, D Darharta Dahrin Darma, Muhammad Surya Dewantara Eris, Deden Diposani, Diva Putri Dodi Nandika Dwiatmaja, Christantius Eko Januari Wahyudi Eko Januari Wahyudi Endrizal Ertanti, Dian Noviana Eti Rohaeti Fajeri, Hairin Fikri Fadli Assidqy, Muhammad Gama Pradana, Mahardika GHOFIQI, ILYASA AYASY EL Hadipradana, Ikhwannuraziz HAJRIAL ASWIDINNOOR HAPPY WIDIASTUTI Hapsaridian, Sandy Harahap, Pahlawansjah Harahap, Pahlawansyah Hasanuddin Z. Abidin Hasanuddin Z. Abidin Hasanuddin Z. Abidin, Hasanuddin Hendra Grandis Hendra Grandis Hendra Grandis Husnun Nadhif, Muhammad I Gusti Bagus Wiksuana I Haryoko, I I Ketut Suada Ichiyu Shou, Ichiyu Ilham Ramadan, Mohammad Indarto Indarto Indhira Hari Kurnia Irmanida Batubara Ismail, Mohd Erfy Jatmika, Ujang Rangga Joenil Kahar Joenil Kahar, Joenil Jumiyanto Widodo Khoregia, Irene Kunimi Maeda, Kunimi Kusnilawati, Nunik Kuswardani, DC. La Ode Muhamad Munadi Lina Karlinasari Lucia Dhiantika Witasari, Lucia Dhiantika M Thaha, M Maftukhin, Anis Maharani, Ellsa Christy Mahmudah, Hani'ah Marpaung, Ferdy Royland Maziati, Atina Milchan, Muhamad Milchan, Muhammad Mitsumine Fukui, Mitsumine Moh. Yogiantoro, Moh. Mustofa, Rizqi Azhar Nadziroh, Faridatun Ningsih, Norma Nisa, Karimatun Novia Ramadhani, Natty Nunuk Mardiana, Nunuk Nuryake Fajaryati Oktariawan, Dimas Pardi Pardi, Pardi Pipit Utami Prabowo, Alvino Dwi Rachman pranawa pranawa, pranawa Puteri, Fidia Putra, Abdul Aziz Sidiq Tri Putri, Ulfa Rismania Rachmayanti, Yanti Raffie Syahdana, Mohammad Rahma Anindita, Sheila Ramadhani, Afifah Dwi RAMADHANI, BINTANG DESTA Ratri, Aestatica Rusdianti, Endang Sa'adah, Nihayatus Saddewisasi, Wyati Satiti, Rini Satoshi Horikoshi, Satoshi Septyawan, Sandra soewanto soewanto, soewanto Sri Mulyatni, Agustin Subagus Wahyuono Sudarsono Sugeng Riyanto Susanti Alawiyah Susanti Alawiyah Tri P Asmarawati, Tri P Trisintyandika, Idkha Trisni Untari Dewi Vera Sadarviana Vera Sadarviana, Vera Wahyudi W. Parnadi Wahyudi W. Parnadi Wahyudi W. Parnadi Warsa warsa Warsa Warsa Wawan Gunawan A. Kadir Wawan Gunawan Abdul Kadir Wawan Gunawan Abdul Kadir Wedyanto Kuntjoro Widiastuti, Endang Retna Triwati Widodo Widodo Widyastuti, SM Widyatra Sudibyo, Rahardhita Widyatra, Rahardhita Windari, Era Nurisa Windarto, Danang Alif Yasuhiko Tomino, Yasuhiko Yatini Yatini Yudha, Gawiya Yuli Budiati Yusuf Azis