Identifikasi Bidang Gelincir Menggunakan Metoda Geolistrik Tahanan Jenis Daerah Rawan Longsor Di Kota Padang Dan Kabupaten Agam Sumatera Barat

2019 ◽  
Vol 2 (2) ◽  
Author(s):  
Akmam Akmam ◽  
Harman Amir ◽  
Amali Putra
Keyword(s):  
Cross Section ◽  
Surface Characteristics ◽  
Least Square ◽  
Inversion Method ◽  
Landslide Risk ◽  
Resistivity Method ◽  
Topographic Slope ◽  
True Resistivity ◽  
West Sumatra ◽  
Landslide Mitigation

Sumatera Barat memiliki topografi bergelombang dan curam. Sumatera Barat disamping memiliki kemiringan topografi lebih dari 30 derajat, juga memiliki curah hujan yang tinggi. Kondisi tersebut menjadikan kawasan ini memiliki potensi resiko longsor yang cukup tinggi. Masalah ini perlu ditanggulangi dengan melakukan penelitian tentang bagaimana karakteristik permukaan bidang gelincir sebagai studi pendahuluan mitigasi longsor di Sumatera Barat. Informasi tentang karakteristik bidang lincir di daerah rawan longsor di Sumatera Barat belum banyak tersedia. Dengan alasan di atas, dilakukan penelitian yang bertujuan untuk mengetahui kedalaman dan kemiringan bidang gelincir di Kota Padang dan Kabupaten Agam Sumatera Barat. Penelitian eksploratif ini menggunakan metode resistivitas dengan peralatan Ares (produksi Cheko). Data resistivitas semu diinterpretasikan menggunakan metode inversi Least-Square yang telah dioptimalkan untuk mendapatkan penampang 2D resistivitas sesungguhnya. Ketebalan dan kemiringan permukaan bidang gelincir daerah target dihitung berdasarkan penampang 2D resistivitas sesungguhnya dengan bantuan data topografi. Penelitian menunjukkan bahwa rata-rata kedalaman dan sudut permukaan bidang gelincir di Kabupaten Agam Sumatera Barat masing-masing adalah 410 dan 16,5 meter. Rata-rata kedalaman dan sudut kemiringan permukaan bidang lincir di Padang masing-masing 380 dan 12,5 meter. Batuan yang berperan sebagai permukaan bidang gelincir adalah Clay.   West Sumatra has wavy and steep topography. Beside, West Sumatra has topographic slope more than 30, it also has high rainfall. This condition makes this area has a high potential of landslide risk. This problem needs to get a scientific study of how the surface characteristics of the landslide field as a preliminary study of landslide mitigation in West Sumatera. Information on the characteristics of landslide surfaces in landslide prone areas in West Sumatra has not been widely available. Based on the above reason, research has been done to find out the depth and slope of the landslide surface in Padang and Agam Regency of West Sumatra. This explorative research uses resistivity method using Ares equipment set (Cheko production). The apparent resistivity data is interpreted using the optimized optimized least-squares smoothness-constrain inversion method in order to obtain true resistivity 2D cross-section.  The layer thickness and the slope of landslide surface the targeted area was calculated base on true resistivity 2D cross-section that synchronized with topographic data. The results showed that the average both depth and angle of the landslide surfaces in Agam regency of West Sumatra were 41 degree and 16.5 meters respectively. The average both depth and angle of the landslide surfaces in Padang were 38 degree  and 12.5 meters respectively. The rock that acts as a landslide surfaces is Clay.

scholarly journals IDENTIFICATION OF THE SLIPS SURFACES USING RESISTIVITY GEOELECTRICAL METHOD IN LANDSLIDE PRONE AREAS IN PADANG AND AGAM REGENCY OF WEST SUMATERA

2019 ◽  
Author(s):  
Akmam Akmam ◽  
Harman Amir; ◽  
Amali Putra
Keyword(s):  
Cross Section ◽  
Surface Characteristics ◽  
Inversion Method ◽  
Landslide Risk ◽  
Resistivity Method ◽  
Topographic Slope ◽  
True Resistivity ◽  
West Sumatra ◽  
Landslide Mitigation ◽  
Steep Topography

West Sumatra has wavy and steep topography. Beside, West Sumatra has topographic slope more than 30, it also has high rainfall. This condition makes this area has a high potential of landslide risk. This problem needs to get a scientific study of how the surface characteristics of the landslide field as a preliminary study of landslide mitigation in West Sumatera. Information on the characteristics of landslide surfaces in landslide prone areas in West Sumatra has not been widely available. Based on the above reason, research has been done to find out the depth and slope of the landslide surface in Padang and Agam Regency of West Sumatra. This explorative research uses resistivity method using Ares equipment set (Cheko production). The apparent resistivity data is interpreted using the optimized optimized least-squares smoothnessconstrain inversion method in order to obtain true resistivity 2D cross-section. The layer thickness and the slope of landslide surface the targeted area was calculated base on true resistivity 2D cross-section that synchronized with topographic data. The results showed that the average both depth and angle of the landslide surfaces in Agam regency of West Sumatra were 41degrees and 16.5 meters respectively. The average both depth and angle of the landslide surfaces in Padang were 38 degree and 12.5 meters respectively. The rock that acts as a landslide surfaces is Clay

scholarly journals PERSAMAAN PERCEPATAN TANAH MAKSIMUM GEMPA TEKTONIK UNTUK KAWASAN SUMATERA BARAT

2019 ◽  
Author(s):  
Akmam Akmam
Keyword(s):  
Physical Characteristics ◽  
Least Square ◽  
Inversion Method ◽  
Local Magnitude ◽  
Ground Acceleration ◽  
Earthquake Energy ◽  
West Sumatra ◽  
Region Data ◽  
Fundamental Research

Characteristic of earthquake in a region can be studied through its physical characteristics, such as magnitude and earthquakes energy. Energy which is produced by earthquake can be predicted from magnitude. So far, a lot of research produces different equation to predict of earthquake energy that is depending on zone of earthquake occurred. The purpose of descriptive fundamental research was to find equation for ground acceleration which is presented by local magnitude earthquake for West Sumatra region. Data sounder for research were collected from BMG Padang Panjang which was recorded from 1982 to 2008. Data are analyzed by using least square inversion method. Equation ground acceleration is log αac = 0.451Io +0.146 ML + 0.744 log ∆ - 2.644, which local magnitude is ML = 0.413I0 – 0.785 Log H + 5.334 and intensity of the earthquake in the epicenter is Io = I + 3 log (Δ/H) + 0.01 (ΔH).

scholarly journals ANALISIS DETERMINAN PERTUMBUHAN EKONOMI DAN KEMISKINAN DI SUMATERA BARAT

2019 ◽  
Vol 1 (3) ◽  
pp. 769
Author(s):  
Lili Manaulisda Fitri ◽  
Hasdi Aimon
Keyword(s):  
Economic Growth ◽  
Time Series ◽  
Cross Section ◽  
Simultaneous Equation ◽  
Equation Model ◽  
Least Square ◽  
Simultaneous Equation Model ◽  
Exogenous Variables ◽  
West Sumatra ◽  
Determinants Of Economic Growth

This study aims to explain the determinants of economic growth and poverty in West Sumatra. This study using Simultaneous Equation Model to determine the effect of exogenous variables on endogenous variable, the analysis uses Indirect Least Square (ILS) method. This study uses a data panel (cross section and time series) sourced from the Central Statistics Agency of West Sumatra. The analysis results show that labor, investment, and unemployment has a significant effect on economic growth, otherthat investment, unemployment, and education has a significant effect on poverty, and poverty has a significant effect on economic growth.

scholarly journals Optimize of Least-Square Inverse Constrain Method of Geoelectrical Resistivity Wenner-Schlumberger for Investigation Rock Structures in Malalak Districts of Agam West Sumatra

2019 ◽  
Author(s):  
Akmam Akmam ◽  
Harman Amir; ◽  
Amali Putra
Keyword(s):  
Least Square ◽  
Inversion Method ◽  
Damping Factor ◽  
Slide Surface ◽  
Rock Structure ◽  
Wide Range ◽  
West Sumatra ◽  
Geoelectric Resistivity ◽  
Geoelectrical Resistivity ◽  
The City

Numerous studies have been conducted on an inversion method, focus on constraining factor,singuler value, speed of convergence. However, the result of inversion is not unique and bivalent. In this research, we optimize of Least-Square constrain by using damping factor. Th is method used for interpretation of the volumes and rock structure in Malalak Distric of Agam West Sumatra. This is undertaken because Malalak districts of Agam West Sumatra that passed by highway Padang and Bukittingi is a frequent area of landslide. Furthermore, the frequency of the landslide depends on the type of rock and the angle of the slope . The depth of the slide surface can be predicted by using the least squares inversion constrain method of Geoelectric Resistivity. Landslides resulted in disruption of transportation between the city of Padang and another district in Sumatra. Based on the above, to determine the rock's structure, the depth and tilt angle of the slide surface in Malalak districts Agam West Sumatra has to take place. Data obtained through Geoelectrical exploration using with automatic resistivitymeter equipment. Constrains were obtained using the Marquat inversion method. The result of the research is first, the damping factor for structures which have wide range resistivity is 0.02 and the smallest damping factor is 0.015. Second, the rock structure in Malalak of Agam consists of clay, sandstone, andesite, and limestone and dolomite. Implementation this research can be used to develop mitigation of landslide deserter.

Profil Penyakit Malaria Di Rumah Sakit Islam Siti Rahmah Padang Tahun 2018

2020 ◽  
Vol 2 (2) ◽  
pp. 08-15
Author(s):  
Rahma Triyana ◽  
Salmi Salmi
Keyword(s):  
Observational Study ◽  
Frequency Distribution ◽  
Cross Section ◽  
Laboratory Tests ◽  
Age Group ◽  
Normal Range ◽  
Cross Sectional ◽  
West Sumatra ◽  
Severity Of The Disease

Malaria is one of the health problems in Indonesia, especially West Sumatra. Determination of the description of Malaria disease in an area is needed to determine the spread and severity of the disease. This study aims to determine the frequency distribution according to age, sex and place of residence, description of the types of Plasmodium causes of Malaria and hematological features in Malaria patients at Siti Rahmah Padang Hospital in 2018. This type of research is a descriptive observational study with an approach or design cross section (cross sectional). The frequency distribution of Malaria sufferers in Siti Rahmah Padang Hospital in 2018 according to the highest age was in the age group 21-30 years as many as 28 cases (36.8%), the highest sex among men was 46 (60.5%) and the highest number of residences was found in Koto Tangah sub-district there were 31 cases (40.8%). The type of Plasmodium found in Malaria cases in Siti Rahmah Padang Hospital in 2018 was P. vivax (73 cases (96.05%)) and P. falciparum (3 cases (3.95%)). The results of laboratory tests on Hb, hematocrit, platelet and leukocyte levels in Malaria positive patients in Siti Rahmah Padang Hospital in 2018 were in the normal range.

Profil Penyakit Malaria di Rumah Sakit Islam Siti Rahmah Padang Tahun 2018

2020 ◽  
Vol 2 (2) ◽  
pp. 08-15
Author(s):  
Rahma Triyana Y ◽  
Salmi Salmi
Keyword(s):  
Observational Study ◽  
Frequency Distribution ◽  
Cross Section ◽  
Laboratory Tests ◽  
Age Group ◽  
Normal Range ◽  
Cross Sectional ◽  
West Sumatra ◽  
Severity Of The Disease

Malaria is one of the health problems in Indonesia, especially West Sumatra. Determination of the description of Malaria disease in an area is needed to determine the spread and severity of the disease. This study aims to determine the frequency distribution according to age, sex and place of residence, description of the types of Plasmodium causes of Malaria and hematological features in Malaria patients at Siti Rahmah Padang Hospital in 2018. This type of research is a descriptive observational study with an approach or design cross section (cross sectional). The frequency distribution of Malaria sufferers in Siti Rahmah Padang Hospital in 2018 according to the highest age was in the age group 21-30 years as many as 28 cases (36.8%), the highest sex among men was 46 (60.5%) and the highest number of residences was found in Koto Tangah sub-district there were 31 cases (40.8%). The type of Plasmodium found in Malaria cases in Siti Rahmah Padang Hospital in 2018 was P. vivax (73 cases (96.05%)) and P. falciparum (3 cases (3.95%)). The results of laboratory tests on Hb, hematocrit, platelet and leukocyte levels in Malaria positive patients in Siti Rahmah Padang Hospital in 2018 were in the normal range.

scholarly journals Import Flows of Bangladesh: Gravity Model Approach under Panel Data Methodology

2012 ◽  
Vol 60 (2) ◽  
pp. 153-157 ◽  
Author(s):  
Mili Roy ◽  
Md. Israt Rayhan
Keyword(s):  
Panel Data ◽  
Gravity Model ◽  
Cross Section ◽  
Time Series Data ◽  
Random Effect ◽  
Least Square ◽  
Series Data ◽  
Ordinary Least Square ◽  
Extended Gravity ◽  
Trading Partners

In counterpoint to export growth, Bangladesh import growth has remained much less strong, despite impressive progress in import liberalization. This study gives an overview of different methodologies related to gravity model analysis in Bangladesh’s import flow. A pooled cross section and time series data were analyzed to incorporate the country specific heterogeneity in country pair trading partners. The import flows are justified by the basic gravity model since Bangladesh’s imports are positively significant by the economy size and inversely related to trade barrier. Accordingly, we have analyzed pooled ordinary least square, fixed effect, random effect. This study also explores extended gravity model using several variables in the light of gravity model panel data approach. Bangladesh’s import is determined by the home and foreign country’s gross domestic product and exchange rate. In addition, Cross section results show that regional trade arrangement which is South Asian Association for Regional Co-operation and border are significant for Bangladesh’s importimplies that Bangladesh should import more from intra regional country and also should import from India.DOI: http://dx.doi.org/10.3329/dujs.v60i2.11485 Dhaka Univ. J. Sci. 60(2): 153-157, 2012 (July)  

Application of Plane Fractal Geometry to Adhesion Strength of Thermal Sprayed Coatings

2000 ◽  
Author(s):  
S. Amada ◽  
T. Hirose
Keyword(s):  
Cross Section ◽  
Fractal Geometry ◽  
Surface Characteristics ◽  
Ceramic Coatings ◽  
Average Surface Roughness ◽  
Roughened Surface ◽  
Fractal Characteristics ◽  
Sprayed Coatings ◽  
Thermal Sprayed Coatings ◽  
Height Data

Abstract Adhesion of ceramic coatings considerably depends on the surface characteristics of blasted substrates. The roughened surfaces have two kinds of topographical characteristics, one is of their cross section and the other is of planar. The roughened surfaces is generated by angled grit-blasting process which can be expected to improve the adhesion of ceramic coatings. The topography of the roughened surfaces has fractal characteristics in their cross section and has been more effectively related to the adhesive strength of ceramic coatings than average surface roughness traditionally used. This paper presents that fractal characteristics is evaluated in the planar topography of the blasted surfaces and shows that the planar fractal characteristics is closely related adhesion of ceramic coatings. The planar fractal dimension is evaluated by SIA (Slit Island Analysis) which needs the height data on the roughened surface. Those data are obtained by a laser-microscope in confocal type.

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