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All Journal Jurnal Fisika Unand Advance Sustainable Science, Engineering and Technology (ASSET) Kaunia: Integration and Interconnection of Islam and Science Journal Berkala Arkeologi Sunan Kalijaga Journal of Physics
Thaqibul Fikri Niyartama
Fakultas Saintek UIN Suka
Religion Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Mathematics Physics Social Sciences

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ESTIMASI NILAI POROSITAS DAN PERMEABILITAS UNTUK CITRA SAMPEL SANDSTONE NGRAYONG MENGGUNAKAN METODE ADAPTIVE Pratiwi, Inti Amalia; Winardhi, Chandra; Niyartama, Thaqibul Fikri
Sunan Kalijaga Journal of Physics Vol. 1 No. 1 (2019): Sunan Kalijaga Journal of Physics
Publisher : Prodi Fisika Fakultas Sains dan Teknologi UIN Sunan Kalijaga Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/physics.v1i1.1627

Abstract

Penelitian ini bertujuan untuk mengestimasi nilai porositas dan permeabilitas sampel sandstone Ngrayong dengan metode Adaptive. Metode Adaptive merupakan salah satu metode Digital Rock Physics (DRP). DRP merupakan metode citra digital yang digunakan sebagai salah satu metode untuk memvisualisasikan batuan menjadi citra digital. Metode ini dapat digunakan untuk menentukan besaran-besaran fisis dari suatu sampel batuan secara lebih efektif dan efisien. Metode Adaptive memiliki tiga pendekatan yaitu Adaptive Median-C, Adaptive Mean-C, Adaptive mean of minimum and maximum. Ketiga pendekatan tersebut memperoleh hasil dari porositas menggunakan metode DRP kemudian akan dibandingkan dengan hasil perhitungan porositas yang dilakukan di laboratorium menggunakan metode porositas Helium. Estimasi nilai porositas menggunakan metode Adaptive yang mendekati dengan hasil perolehan nilai porositas Helium adalah menggunakan metode Adaptive Median-C. Hasil estimasi nilai porositasnya adalah 26,8%. Sedangkan hasil nilai porositas Helium mencapai 29%. Hasil estimasi nilai porositas dari pendekatan metode Adaptive yang lain, nilainya lebih dari 30%. Estimasi nilai permeabilitas pada sampel Ngrayong dengan ukuran resolusi citra digital 200x200x200 piksel dan menggunakan iterasi 30.000 adalah 14,6175 mD.
ANALISIS INDEKS BAHAYA GEMPA BUMI BERDASARKAN PGA PERMUKAAN DI KECAMATAN SANDEN KABUPATEN BANTUL D.I. YOGYAKARTA Umar, Umar; Niyartama, Thaqibul Fikri; Wibowo, Nugroho Budi
Sunan Kalijaga Journal of Physics Vol. 3 No. 2 (2021): Sunan Kalijaga Journal of Physics
Publisher : Prodi Fisika Fakultas Sains dan Teknologi UIN Sunan Kalijaga Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/physics.v3i2.2314

Abstract

This research is motivated by the earthquake phenomena that have occurred in the Yogyakarta area due to the 2006 earthquake. This study aims to determine the earthquake hazard index based on the method developed by BNPB and JICA by making earthquake hazard distribution maps correlated with settlement maps. This research was conducted in Sanden District in the south of Bantul Regency. The BNPB and JICA methods utilize four main parameters, namely shear wave velocity at a depth of 30 meters (Vs30), Ground Amplification Factor (GAF), accelerated ground rock vibration (PGASB) and acceleration of surface ground vibration (PGA). Vs30 is obtained from the inversion method using microtremor measurement data, the Vs30 value is converted into a GAF value using the formula Midorikawa et al (1994), for PGASB it is obtained from the PUSKIM website, based on the earthquake hazard index mapping guide the Vs30 and PGASB values obtained if multiplied then will get the surface PGA value then the surface PGA value is reclassified by the type of class based on the BNPB and JICA methods. The results showed that the value of Vs30 ranged from 154.66 m / s to 260.80 m / s, GAF values ranged from 1.64 g to 2.09 g, PGASB values ranged from 0.52 g to 0.67 g, and PGA values surface ranges from 0.87 to 1.32 g. The earthquake hazard index covers the entire Sanden District with an index value of 1 and the highest distribution of settlements prone to earthquake hazards is in the entire study area.Keywords: Microtremor, Vs30, GAF, surface ground vibration acceleration (PGA), PGASB, earthquake.
Analisis Potensi Likuefaksi Berdasarkan Metode Global Geospatial Model di Kecamatan Sanden Kabupaten Bantul Yogyakarta Annas, Mohamad Chairul; Niyartama, Thaqibul Fikri; Wibowo, Nugroho Budi
Sunan Kalijaga Journal of Physics Vol. 3 No. 1 (2021): Sunan Kalijaga Journal of Physics
Publisher : Prodi Fisika Fakultas Sains dan Teknologi UIN Sunan Kalijaga Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/physics.v3i1.2316

Abstract

This research is motivated by the liquefaction phenomenon that has occurred in Yogyakarta area due to the 2006 earthquake. This study aims to find out the probability of liquefaction based on the Global Geospatial Model (GGM) method and create a map of the distribution of liquefaction-prone settlements. This research was conducted in Sanden Subdistrict in the southern part of Bantul Regency. The GGM method utilizes three main parameters: shear wave speed at a depth of 30 meters (Vs30), acceleration of ground vibration (PGA) and ground wetness index (CTI). Vs30 is derived from the inverse method of microtremor measurement results, PGA is obtained from the PUSKIM website and the CTI value is obtained from the Centre for Ecology and Hydrology's (CEH) website. The results showed that vs30 values ranged from 154.66 m / s to 260.80 m / s, CTI values ranged from 5.45 to 9.28 and PGA values ranged from 0.52 g to 0.67 g. The potential for liquefaction occurred throughout Sanden Subdistrict with a probability value of > 0.99 and the highest distribution of likuefkasi-prone settlements in the east of the research area.  
Identification of Landslide Prone Areas with Schlumberger Configuration Geoelectric Method, Kalongan Village, East Ungaran in 2023 Rahmawati, Zeni; Niyartama, Thaqibul Fikri; Wibowo, Nugroho Budi; Andi, Andi
Advance Sustainable Science, Engineering and Technology Vol 6, No 2 (2024): February - April
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v6i2.18163

Abstract

Landslides are one of the natural disasters that occur in Semarang Regency. The landslide event in Kalongan Village, East Ungaran Subdistrict took place in 2022 to 2023. The dimension of the landslide is large and has the potential to cause damage to infrastructure and settlements, mitigation measures are needed. One of the mitigation measures is to identify the lithology of the landslide area and its surroundings. This study aims to determine the lithology of the landslide area and its surroundings using the Schlumberger configuration geoelectric method. Geoelectric acquisition using a set of naniura geoelectric, with a line variation of 120 to 300 meters. The number of measurement lines is 6 VES located in the landslide zone in the Kaligetas Formation. The results showed that the avalanche zone is composed of Tufan Sandstone with a resistivity of 0.17 Ωm to 334.9 Ωm, Tuff with a resistivity of 10.03 to 26.96 Ωm, and Lava Flow with a resistivity of 1161.91 Ωm to 3040.05 Ωm. Avalanche materials were identified to be associated with lithologies such as tufan sandstone and tuff with a thickness between 5 to 50 m.
Synthesis of NiO/Zeolite Catalyst and Its Performance in Renewable Biomass Gasification Electric Generator Niyartama, Thaqibul Fikri; Widiakongko, Priyagung Dhemi
Kaunia: Integration and Interconnection Islam and Science Journal Vol. 21 No. 1 (2025)
Publisher : Fakultas Sains dan Teknologi UIN Sunan Kalijaga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/kaunia.5266

Abstract

Research on NiO/Zeolite catalytic biomass gasification to produce electricity has been completed. This study aims to study the effect of the NiO/Zeolite catalyst on the voltage and current generated in the gasification process. This research was carried out by making NiO/Zeolite catalysts using the wet impregnation method, followed by contructing a gasification device plus installing a batch of catalysts in the reactor, and then testing the electrical parameters produced by the gasification equipment. The results obtained are NiO/Zeolite catalysts which have been successfully synthesized using FTIR spectral indicators and XRD diffractograms with the appearance of NiO and Ni peaks at angles of 2θ 28o and 63o. The resulting catalyst was also reported to have succeeded in increasing voltage stability compared to the gasification process without a catalyst with a maximum value of 250 V and an average value of 225 V. The NiO/Zeolite catalyst also succeeded in increasing the current value and stabilizing the current value compared to the non-reaction gasification process with a maximum of 50 A and an average of 44 A.
Pemodelan Peak Ground Accleration (PGA) dan Intensitas Gempabumi berdasarkan Pengukuran Mikrotremor pada Kawasan Longsor di Desa Kalongan, Ungaran Timur Wibowo, Nugroho Budi; Niyartama, Thaqibul Fikri; Andi, Andi; Septiana, Rena; Widianingrum, Erlina; Bustari, Ahdian Azri; Arif, Iktifal Ajie
Jurnal Fisika Unand Vol 13 No 2 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.2.225-233.2024

Abstract

The landslide in Kalongan Village affected an area of 5 hectares and has the potential to experience further landslides. Landslides can occur with triggers of external factors such as earthquakes. The Peak Ground Acceleration (PGA) parameter can represent the impacts that occur on the surface in the form of earthquake intensity (MMI). Kalongan Village is 25.5km from the epicenter of the Ambarawa earthquake on 27 May 2023. This study aims to modeling the PGA microzonation and the intensity of the Ambarawa earthquake in the avalanche zone in Kalongan Village. The PGA model is based on measurements of 72 microtremor data in the avalanche zone using the Kanai method. Parameters of the Ambarawa earthquake with a magnitude of 2.5 and a depth of 5 km. The results of PGA modeling in the avalanche zone varied between 1.0-7.1 gal or I-II MMI values. The results of the PGA modeling show that aftershocks can occur if the strength of the Ambarawa earthquake reaches M=4 or 7.1-50.8 gal. The strength of the earthquake is equivalent to the intensity of II-V MMI.
PEMETAAN SEBARAN BATUAN PENYUSUN PAGAR CANDI DI SITUS CANDI LOSARI DUSUN LOSARI, DESA SALAM, KECAMATAN SALAM, KABUPATEN MAGELANG BERDASARKAN METODE MAGNETIK Ariani, Novi Dwi; Niyartama, Thaqibul Fikri; Wibowo, Nugroho Budi
Berkala Arkeologi Vol. 33 No. 1 (2013)
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30883/jba.v33i1.10

Abstract

Mapping geophysics research was conducted by geomagnetic method to know anomaly pattern of magnetic pole and to know distribution location and depth of temple gate composing stone in Losari Temple Site by using magnetic data. Data collection used Proton Precessions Magnetometer (PPM) G-856AX by area width of 88 km x 40 km and measurement space of 3 meter used looping method. Field data was corrected by daily variation and IGRF (International Geomagnetics Reference Field) correction and then reduction to pole. The slice modeling was conducted on local anomaly map on height of 6 meter. The result of the local magnetic field anomalies incision then interpolated to get an idea of the spread and depth of rocks making up the fence Losari temple. Local anomaly map shows that anomaly position lies in southwest, southeast, and northeast from main temple. Based from interpolated distribution of magnetic pole anomaly is dominated in depth of 2 meter to 4 meter.
Co-Authors Andi Andi Annas, Mohamad Chairul Arif, Iktifal Ajie Bustari, Ahdian Azri Novi Dwi Ariani, Novi Dwi Nugroho Budi Wibowo Pratiwi, Inti Amalia Rahmawati, Zeni Septiana, Rena Umar Umar Widiakongko, Priyagung Dhemi Widianingrum, Erlina Winardhi, Chandra