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Adrianus Inu Natalisanto
Department Of Physics, Faculty Of Mathematics And Natural Sciences, Universitas Mulawarman
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IDENTIFIKASI SEBARAN MINERAL BIJIH BESI DENGAN MENGGUNAKAN METODE RESISTIVITAS DAN INDUCED POLARIZATION (IP) DI KECAMATAN MUARA UYA, KABUPATEN TABALONG, PROVINSI KALIMANTAN SELATAN Ferial, Deki; Natalisanto, Adrianus Inu
GEOSAINS KUTAI BASIN Vol 2 No 2 (2019)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v2i2.471

Abstract

The geoelectric method is one of the geophysical methods. It studies the electrical properties on earth and detects on the surface of the earth. In this case includes the measurement of potential, currents and electromagnetic fields that occur either naturally or due to injection of current into the earth. This research was conducted at the mining site of PT. Bakal Makmur Sejahtera (BMS). Geographically, the mining location of PT. BMS is located at 173° 15' 32.8896" BT, 0° 10' 32.5209" LS. In the five line was measured to obtain the values of apparent resistivity (ρa) and apparent chargeability (ma) this using the Wenner-Schlumberger array of 3,900 data. These values are processed by the res2dinv program to obtain 2-D from each line. The results of geoelectric modeling there is an indication of iron ore from lines 1 to 6 with a distribution of resistivity values 43,5 Ω.m to 249 Ω.m and distribution of chargeability values 34,4 msec to 99,7 msec. The interpretation supporting by outcrop data in the field.
KAITAN INTENSITAS HAMBURAN SINAR GAMMA TERHADAP SIFAT FISIS BATUAN Sitorus, Merryana Desidoria; Natalisanto, Adrianus Inu; Lepong, Piter
GEOSAINS KUTAI BASIN Vol 1 No 2 (2018)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v1i2.283

Abstract

Information on the intensity of gamma-rays scattered by the rock formation is contained in the density-log which is the output of a well logging system. In this research it was studied the relation of the intensities with the physical properties of the rocks in a rock formation. The study was performed by determining the intensities of gamma-rays scattered recorded in the data of density-log’s curves and continued by analyzing the rock’s physical properties that might decrease the intensities of gamma rays, such as molecular weight, coefficient of attenuation, and scattering cross-sectional. Result of the research was the graph which can be used to predict the properties of any sediment rocks by only using the scattered gamma ray intensities recorded in the data of density log.
Pengaruh Inherent Moisture Terhadap Nilai Kandungan Kalori Pada Batubara Kaltim (Studi Kasus Data Im dan Data Kalori Tahun 2019 di PT. Geoservices Samarinda) Yanti, Nurma; Djayus, Djayus; Suprianto, Suprianto; Natalisanto, Adrianus Inu
GEOSAINS KUTAI BASIN Vol 4 No 2 (2021)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v4i2.746

Abstract

Nilai kalori batubara dipengaruhi oleh beberapa faktor seperti kandungan air bawaan (inherent moisture) atau IM, abu (ash), karbon tetap (fixced carbon), total sulfur dan zat terbang (volatile matter). Tujuan penelitian ini untuk mengetahui berapa jumlah sampel batubara yang masuk ke dalam kelas kalori rendah, kelas kalori sedang, kelas kalori tinggi dan kelas kalori sangat tinggi, pengaruh inherent moisture terhadap nilai kalori batubara dan gambaran umum IM dan kalori batubara. Penelitian ini di lakukan di PT.Geoservices Samarinda, penelitian ini menggunakan data sekunder yaitu data kalori dan IM tahun 2019. Dilakukan perhitungan sebaran frekuensi nilai kalori dan IM. Kemudian kedua jenis data tersebut di plot untuk melihat pengaruh IM terhadap kalori. Hasil penelitian menunjukkan jumlah sampel kelas kalori rendah sebanyak 496 (11.4%) didominasi oleh IM kategori sedang, kelas kalori sedang 3146 (72.3%) didominasi IM kategori sedang, kelas kalori tinggi 649 (14.92%) didominasi IM kategori rendah, dan kelas kalori sangat tinggi 60 (1.38%) didominasi IM kategori rendah. Nilai korelasi IM terhadap kalori pada kelas kalori rendah -0.46, kelas kalori sedang -0.60, kelas kalori tinggi -0.90 dan kelas kalori sangat tinggi -0.79 hal ini menunjukkan bahwa semakin tinggi nilai IM nilai kalori akan semakin rendah. Sebanyak 72.3% batubara masuk dalam kelas kalori sedang dengan nilai IM antara 14.22-16.13 %adb (air dried base).
IDENTIFIKASI KAWASAN ZONA PANAS BUMI (GEOTHERMAL) DI DAERAH X MENGGUNAKAN METODE MAGNETOTELLURIK Andini, Dela; Lepong, Piter; Natalisanto, Adrianus Inu
GEOSAINS KUTAI BASIN Vol 3 No 1 (2020)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v3i1.599

Abstract

Geothermal is the heat formed inside the earth's crust. The heat of geothermal produces hot water, steam, and heat rocks along with other minerals and gases to be genetically inseparable in geothermal systems. One of the geophysical method which can be used to determine the area of a geothermal system is magnettoteluric. The method is based on the values of resistivity distribution of the rock formation. In the study on the identification of geothermal zone in the X area, it was found the resistivity distribution in 1D and 2D models by using the magnettoteluric method. The models were created by processing of magnettoteluric data taken from three measuring lines. The 1D model was the resistivity distribution vertically generated from the depth of each measurement point, while the 2D model was the resistivity distribution generated in vertical and lateral to form the image of geothermal system. In the 1D model the resistivity distribution values were in the range of 66 ohm.m and 270 ohm.m, while in the 2D model the resistivity distribution values were in the range of 66 ohm.m and 221 ohm.m. From the image it could be interpreted the low resistivity related to the cap rock zone located above the reservoir zone, the medium resistivity related to the reservoir zone located below the cap rock zone, and the high resistivity related to the heat source zone located below the reservoir zone. The study found that the position of geothermal reservoir was under the cap rock zone.
INTERPRETASI KECEPATAN GELOMBANG GESER (VS) PADA LAPISAN BAWAH PERMUKAAN DAERAH ‘X’ DENGAN METODE SEISMIK MASW (MULTICHANNEL ANALYSIS OF SURFACE WAVE) Daud, Anye Gidalti; Lepong, Piter; Natalisanto, Adrianus Inu
GEOSAINS KUTAI BASIN Vol 4 No 1 (2021)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v4i1.678

Abstract

ABSTRACT MASW or Multichannel Analysis of Surface Wave is a seismic method that utilizes the dispersive property of surface wave to interpret surface wave velocity which is directly related to the stiffness of a subsurface layer reaching 30 meters depth that beneficial in the geoengineering field. The goal of this research is to interpret shear wave velocity of subsurface layer in an area to inform the stiffness level of - subsurface layer through shear wave velocity and depth profiling. The steps of this research are converting seismic raw data into numeric data, generating dispersion image, extracting dispersion curve from dispersion image and analyzing dispersion curve by theoretical and experimental data. Based on analysis results, shear wave velocity obtained up to 170m/s with 16 meters investigation depth. Whereas fundamental mode frequency of Rayleigh wave between 2 – 12 Hz. Low shear wave velocity (<180 m/s) of investigated area indicates that the subsurface layer dominated with soft soil which is an early sediment in the shape of alluvium layer and has high seismic wave amplification that hazardous for building build upon the layer.
ANALISIS PENYEBARAN SIFAT FISIS BATUAN RESERVOIR DENGAN METODE GEOSTATISTIK (STUDI KASUS: LAPANGAN BOONSVILLE, TEXAS, AMERIKA SERIKAT) Puspita Sari, Claudia Dewi; Lepong, Piter; Natalisanto, Adrianus Inu
GEOSAINS KUTAI BASIN Vol 2 No 1 (2019)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v2i1.349

Abstract

Physical properties of reservoir rocks are very important in hydrocarbon production. This study analyzes the physical properties of porosity value in reservoir rocks. The aim was to estimate the distribution of porosity in the reservoir rocks. There are several methods available in estimating the reservoir properties distribution. This study uses the geostatistical method to estimate the distribution of porosity value in three different wells in Boonsville Field. Semivariogram analysis is essential steps in geostatistical method in analysis the autocorrelation the the petrophysical data of geophysical logging. The experimental semivariogram with spherical model obtained the sill value 14,94; nugget value 7,85; and range value 1646. The value use as input data in estimate the distribution of porosity value by ordinary kriging. Result of estimation using geostatistical method shown in around well area of IG Yates 31 and IG Yates 19 have the most optimal physical properties as reservoir rocks.
INTERPRETASI PERSEBARAN LAPISAN BATUBARA MENGGUNAKAN GEOPHYSICAL LOGGING PENDEKKATAN KRIGING DI PT. X, DAERAH PROVINSI KALIMANTAN TIMUR Rahmayanti, Nur; Supriyanto, Supriyanto; Natalisanto, Adrianus Inu
GEOSAINS KUTAI BASIN Vol 2 No 2 (2019)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v2i2.467

Abstract

Geophysical logging method is one of the geophysical methods used to determine thickness of the coal seam, the upper and the lower limits of the coal layer illustrate the lithology sequence of rocks in each borehole. The kriging method is one of the interpolation methods in geostatistical methods that often used to predict the problem. This study aims are determine the estimation of coal seam distribution derived from thickness data that obtained from the analysis of geophysical logging methods and the distribution of coal quality viewed from Ash content, Fixced Carbon, Volatile Matter, and Sulfur. The data used in this study are secondary data of coal weld data and coal quality data. Data from coal welding was analyzed using geophysical logging by considering the gamma ray log and log density to obtain coal thickness and then the coal thickness data. The coal quality data was used to estimate the distribution of coal layers and coal quality using the Ordenary Kriging method. Based on the results of the study. The NR4 seam coal is in the form of an estimation model which is displayed in color where there is a distribution of the thickness of the rock interpreted with the smallest coal thickness value of 0.7238 - 0.9055 (m) and the largest thickness value is 1,996 - 2,178 (m) with an average thickness 4,343 m and estimated ash content of 3,348% -11.7%, fixced carbon 40.72% - 46.22%, volatile matter 35.91% -39.49% and sulfur 0.152% - 0.981%.
Penilaian Tingkat Risiko Postur Kerja Menggunakan Metode REBA dan Biomekanika Pada Aktivitas Mengangkat Beban Jordan, Aldi Rizki; Wardani, Pratiwi Sri; Subagiada, Kadek; Putri, Devina Rayzy Perwitasari Sutaji; Natalisanto, Adrianus Inu
Progressive Physics Journal Vol 4 No 1 (2023): Progressive Physics Journal
Publisher : Program Studi Fisika, Jurusan Fisika, FMIPA, Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ppj.v4i1.1021

Abstract

The activity of lifting weights has many risks that can lead to complaints and work accidents such as mistakes in lifting excessive loads, overly bent postures, and other complaints that result in uncomfortable working conditions. This research was conducted to determine the risk level of work posture using the REBA method and biomechanics in lifting weights with different lifting variables. The research were took documentation data, angle and distance measurements by using the Kinovea application, and the data analyzed by using the REBA Assessment Worksheet and biomechanical equations. Based on the results obtained, the activity of lifting burdens on workers from the aspect of the REBA method mostly has a high level of risk category and only 1 worker has a moderate level of risk category. Meanwhile, from the biomechanics aspect, most of them have a risk level in the careful category, 1 worker has a risk level in the safe category, and 1 worker who has lifted a load of 50 kg has a risk level in the dangerous category.
ANALISIS ISODOSIS TEKNIK TIGA DIMENSI DENGAN LAPANGAN KRANIOSPINAL PADA PASIEN ANAK Sari, Radila Mawar; Natalisanto, Adrianus Inu; Perwitasari Sutaji Putri, Devina Rayzy
Progressive Physics Journal Vol 4 No 1 (2023): Progressive Physics Journal
Publisher : Program Studi Fisika, Jurusan Fisika, FMIPA, Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ppj.v4i1.958

Abstract

Craniospinal is known as the method to kill the cancer within a wide radiation area, starting from the cranial to spinal nervous system. In the case, the cancer has spread through the fluid of cerebro spinalis, such as medulloblastoma. We carried out the research to determine the isodose curve in medulloblastoma craniospinal patients and DVH (Dose Volume Histogram) statistic in the OAR (Organ at Risk) by using 3D-CRT radiotherapy technique. To conduct the radiative treatment, we used the moving Junction method in which the radiation was divided into three Iso section, i.e.: Section Iso brain with gantry 90° and 270°, Section Iso thoracic with gantry 0°, and Section Iso lumbar with gantry 0°. Then, we analyzed the isodose curves and DVH statistics created by photon beams of 6 MV and 10 MV with and without considering the dose absorbed by OAR. We found that the isodose curves created with considering the OAR dose were better than those created without considering the OAR dose. We also found that the dose absorbed by OAR was within the tolerance limit stated in ICRU guidelines. Kata Kunci: DVH of statistic, Isodose curve, Craniospinal, Medulloblastoma
Pengaruh Iklim Kerja Panas Terhadap Respon Fisiologis Pekerja dalam Ruang Preparasi di PT-X fitriani, nur shabrina ulima; Natalisanto, Adrianus Inu; Sutaji Putri, Devina Rayzy Perwitasari; Mislan, Mislan; Putri, Erlinda Ratnasari
Progressive Physics Journal Vol 4 No 1 (2023): Progressive Physics Journal
Publisher : Program Studi Fisika, Jurusan Fisika, FMIPA, Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ppj.v4i1.1025

Abstract

Work climate is one of the factors whose gave big influence on the performance of human resources, for both in hot work climate and cold work climate, even the effect is not limited to performance but can go further, specifically on the safety and health of workers. For this reason, it is necessary to measure and evaluate the working climate standard. This study was conducted to determine the effect of hot working climate on the physiological response of workers in the preparation room at PT-X and to find a temperature control strategy in the preparation room at PT-X. The research were carried out in 4 steps, namely: first was collecting data on the work climate in the Preparation Room at PT-X, second was collecting data on the workload of workers in the Preparation Room at PT-X, third was collecting data on the physiological response of the worker in the form of measuring body temperature, measuring blood pressure, measuring pulse rate and measuring the weight of workers. The last step was analysis. Based on the results of the research, the hot working climate affects the physiological response of the workers before and after work. The strategy for controlling the hot working climate in the Preparation Room at PT-X is by increasing the rest time for workers, maximizing the use of PPE (Personal Protection Equipment) for each worker, and adding health signs at the worker's location.
Co-Authors Aditya Rinaldi Agus Anwar Ahmad Zarkasi Alris Sanca Pratama Putra Amalia, Ani Amirin Kusmiran Andini, Dela Anugerah, Quintiza Asmaidi Dadan Hamdani Dadan Hamdani, Dadan Datu, Bonaria Daud, Anye Gidalti David Bandhaso Devina Rayzy Perwitasari Devina Rayzy Perwitasari Sutaji Putri Dewa Made Wiadnyana Djayus Djayus, Djayus Elfrida Dwi Saputri Feni Eka Novitasari Ferial, Deki fitriani, nur shabrina ulima Hananda Putra, Muhammad Fauzan Hasan, Aly Hidayatullah, Muhammad Ida Ayu Putu Sri Widnyani Igor Levi Satriani Intifadhah, Sahara Hamas Jerri, Alyadris Jordan, Aldi Rizki Kadek Subagiada Kadek Subagiada, Kadek Kholis Nurhanafi Lagihara, Chrismasisca Hanni Drescher Lepong, Piter M. Wafieq Akbar Al Asyrafi MARIA BINTANG Mawadah, Anis Mislan Mislan Mislan Muliana Dai Munir, Rahmawati Mutiara Ayu Lestari Nuraidha, Amalia C Pebriani, Putri Hesti Perdana, Akbar Perwitasari Sutaji Putri, Devina Rayzy Piter Lepong Pratiwi Sri Wardani Pratiwi Sri Wardani PSP, Devina Rayzy Puspa Syadariah Puspita Sari, Claudia Dewi Putri, Devina Rayzy Perwitasari Sutaji Raden Mohamad Herdian Bhakti Rahmat Gunawan Rahmayanti, Nur Rahmiati Rahmiati Rayzy Perwitasari Sutaji Putri, Devina Renaldy, Renaldy Retno Zurma Rismawati, Puspa Robiatul Adawiyah Safitri, Niken Ari Salamah, Alifah Balqis Sari, Radila Mawar Septiardi, Muhammad Evan siti istikhomah Siti Khadijah Sitorus, Merryana Desidoria Suhadi Muliyono Suhaesih Rianto Sukmawati Said Supriyanto Supriyanto Supriyanto Supriyanto Sutaji Putri, Devina Rayzy Perwitasari Syahrir Syahrir Syahrir Syahrir Syahrir Syahrir Syarawie, Muhammad Mutawallie Wahyuni, Risma Nur Wardani, Pratiwi Sri Wiranata, Doni Yanti, Nurma