scholarly journals Optimization of 2-D Magnetotelluric (MT) Modes Based on Data Dimensionality to Delineate Potential Area for Shale Gas Prospect in Kutai Basin, East Kalimantan, Indonesia

2021 ◽  
Vol 873 (1) ◽  
pp. 012039
Author(s):  
Hidayat ◽  
G.M Lucky Junursyah ◽  
Ahmad Setiawan ◽  
Andrawan Erlang Pradana

Abstract We conducted a study using the magnetotelluric method in the Kutai Basin, which is one of the largest and deepest tertiary sedimentary basin located in the province of East Kalimantan, Indonesia. The Kutai Basin, which is one of the sedimentary basin that is proven to produce hydrocarbons in Indonesia, also has the potential for shale gas with all the complexities of its geological structure. Inversion of 2-D MT can generally be done in three modes with different sensitivity. We perform data processing objectively to obtain the best quality data. We continued our data processing to the inversion process with a range from 80.78% to 97.09% coherency data. We also performed sensitivity skewness calculations to determine the dimensionality of our data. The map of sensitivity skewness is shown for the vertical path A – A’ with direction N – S in our study area. Based on the calculation results, the skewness value below 0.3 is obtained around the frequency 320 - 0.002 Hz, and associated with the 2-D structure while value above 0.3 are obtained around the frequency 0.00198 - 0.00034 Hz at KT34 and KT36 stations. Based on dimensionality calculations, it is concluded that the MT data in the Kutai Basin is dominated by 2-D structural responses, so that the TE + TM (invariant) mode is the best measurement mode for inversion modeling. We also performed calculations to obtain the optimum smoothness factor (tau) using a trade-off curve. Based on the results of the inversion with the optimization of these data parameters, we obtained a subsurface geological structure pattern such as fault and fold structure along the vertical path of A – A’. The low resistivity anomaly is interpreted as a response to the presence of black shale which is part of the Pamaluan Formation. The top of the Pamaluan Formation is estimated at the depth that varies from 2000m to 4000m below the surface along the A – A’ vertical cross-section.

2016 ◽  
Vol 2016 ◽  
pp. 1-14 ◽  
Author(s):  
Glauco Feltrin ◽  
Nemanja Popovic ◽  
Kallirroi Flouri ◽  
Piotr Pietrzak

Wireless sensor networks have been shown to be a cost-effective monitoring tool for many applications on civil structures. Strain cycle monitoring for fatigue life assessment of railway bridges, however, is still a challenge since it is data intensive and requires a reliable operation for several weeks or months. In addition, sensing with electrical resistance strain gauges is expensive in terms of energy consumption. The induced reduction of battery lifetime of sensor nodes increases the maintenance costs and reduces the competitiveness of wireless sensor networks. To overcome this drawback, a signal conditioning hardware was designed that is able to significantly reduce the energy consumption. Furthermore, the communication overhead is reduced to a sustainable level by using an embedded data processing algorithm that extracts the strain cycles from the raw data. Finally, a simple software triggering mechanism that identifies events enabled the discrimination of useful measurements from idle data, thus increasing the efficiency of data processing. The wireless monitoring system was tested on a railway bridge for two weeks. The monitoring system demonstrated a good reliability and provided high quality data.


2021 ◽  
Vol 4 (1) ◽  
pp. 109
Author(s):  
Verell Rengga Harsvardan ◽  
Anissa Noor Tajudin

This research will redesign the flexible pavement on the Kalihurip-Cikampek toll road using three flexible pavement design methods, namely the 2002, 2013 and 2017 methods, and analyze the structural responses that occur in the form of horizontal and vertical strain, the main components. In calculating the value of repetition of permits against fatigue damage (Nf) and groove cracks (Nd), it is processed using the KENPAVE program. Furthermore, the calculation results of the flexible pavement thickness, the value of repetition of permits against fatigue damage (Nf) and groove crack damage (Nd) were compared from the three methods. The method used is mechanistic-empirical. Primary data is obtained from the Ministry of Public Works and Public Housing and LHR0 starting in 2020, taking into account traffic growth from 2020 to 2035, as well as secondary data assumptions by referring to previous regulations and research. The results of this study indicate that the 2002 method produced the largest pavement thickness, while the 2013 and 2017 methods produced relatively the same pavement thickness. However, the 2002 method produced the largest repetition of permits against fatigue damage (Nf) and groove cracks (Nd). So it can be concluded that the 2017 method produces a better design. ABSTRAKPenelitian ini akan mendesain ulang perkerasan lentur pada Jalan Tol Jakarta-Cikampek ruas Kalihurip-Cikampek menggunakan tiga metode desain perkerasan lentur yaitu metode 2002, 2013, dan 2017, serta menganalisis respons struktral yang terjadi berupa regangan horisontal dan vertikal, komponen utama dalam menghitung nilai repetisi izin terhadap kerusakan fatik (Nf) dan retak alur (Nd), diolah menggunakan program KENPAVE. Selanjutnya dibandingkan hasil perhitungan tebal perkerasan lentur, nilai repetisi izin terhadap kerusakan fatik (Nf) dan kerusakan retak alur (Nd) dari ketiga metode tersebut. Metode yang digunakan mekanistik-empiris. Data primer didapat dari Kementerian Pekerjaan Umum dan Perumahan Rakyat (PUPR) dan LHR0 dimulai pada tahun 2020, memperhitungkan pertumbuhan lalu lintas dari tahun 2020 sampai 2035, serta data sekunder asumsi dengan tetap mengacu pada peraturan dan penelitian sebelumnya. Hasil penelitian ini menunjukkan bahwa metode 2002 menghasilkan tebal perkerasan terbesar, sedangkan metode 2013 dan 2017 menghasilkan tebal perkerasan yang relatif sama. Namun metode 2002 menghasilkan repetisi izin terhadap kerusakan fatik (Nf) dan retak alur (Nd) terbesar. Sehingga disimpulkan metode 2017 menghasilkan desain lebih baik.


2021 ◽  
Author(s):  
A. Eisenmann ◽  
T. Streubel ◽  
C. Kattmann ◽  
K. Rudion

2014 ◽  
Vol 628 ◽  
pp. 426-431
Author(s):  
Li Bo Zhou ◽  
Fu Lin Xu ◽  
Su Hua Liu

Data processing is a key to reverse engineering, the results of which will directly affect the quality of the model reconstruction. Eliminate noise points are the first step in data processing, The method of using Coons surface to determine the noise in the data point is proposed. To reduce the amount of calculation and improve the surface generation efficiency, data point is reduced. According to the surrounding point coordinate information, the defect coordinates are interpolated. Data smoothing can improve the surface generation quality, data block can simplify the creation of the surface. Auto parts point cloud data is processed, and achieve the desired effect.


Author(s):  
Yosuke Dendo ◽  
◽  
Katsuari Kamei ◽  

It is difficult to let computer express feelings because of the ambiguity and nonlinearity. But it is important for people to communicate with computers and to built a society where people live with many robots. And it is said that expressing emotions is usuful for high quality data processing. In this paper, we construct an environment where an agent expresses its emotions to convey its intentions to other agents. First, we survey emotion models from the view point of psychology. Next, we propose an agent system that he can control other agents using his emotion expression as their communication method. Finally, we show that the agent could achieve his goal and that the agent had a kind of personality.


2020 ◽  
Vol 3 (1) ◽  
pp. 18
Author(s):  
Mebby Suwarna ◽  
G M Saragih ◽  
Soni Pratomo

The purpose of this study is to measure the amount of actual CO2 emissions released by the activity, calculate the amount of CO2 emissions that can be absorbed by green space and determine the amount of green space needs in Telanaipura and Simpang IV Sipin. This research uses qualitative research. The sample of this research is CO2 concentration. The results of CO2 measurements conducted in this study averaged 440,071 ppm on the first day, 436,2791 ppm on the second day, 439,847 ppm on the third day, 420,431 ppm on the fourth day, 439,467 ppm on the fifth day, 435,533 ppm on the second day sixth day and 431,884 ppm on the seventh day. Based on data processing results from Spot 7 Satellite Imagery, the amount of CO2 emissions that can be absorbed by vegetated land cover is 35,621.6 tons / year. Based on the calculation results using BAPPEDA Jambi City the amount of CO2 emissions that can be absorbed by green space is 3,645.6 tons / year. The number of green open space needs in Telanaipura and Simpang IV Sipin sub-districts, Telanaipura sub-district is based on Image Spot 7 data processing and calculations using the green space requirements formula is -62.5 Ha. Where these results mean based on the current situation, still has an excess of 62 hectares of green space. Then based on BAPPEDA Jambi City data the calculation uses the green space requirement formula of -6.4 Ha. Where these results mean based on the current situation, still has an excess of RTH of 6.4 Ha.


Georesursy ◽  
2013 ◽  
Vol 52 (2) ◽  
pp. 21-25 ◽  
Author(s):  
F.S. Ulmasvay ◽  
◽  
N.I. Basarevskaya ◽  

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