61 research outputs found
Electrical resistivity and induced polarization techniques for groundwater exploration
No full textElectrical resistivity and induced polarization surveys have been conducted for groundwater exploration at two different sites of geological aged i.e. Carboniferous and Quaternary. This study discussed the earth materials resistivity and chargeability for metasedimentary rock and unconsolidated sediment for groundwater exploration at Kampung Jongok Batu, Dungun and Kampung Paya Rawa, Besut, respectively. For this study Terrameter LS2, cable, electrode, cable connector, battery and remote cable are tools for measurement. The spacing between electrodes is 5 m, maximum length of spread line is 400 m and using Pole-Dipole protocol. Via comparing between the resistivity and chargeability values able to provide better interpretation for ground water exploration for metasedimentary rock and unconsolidated quaternary sediment. The result shows the important of chargeability for refining the resistivity value for locating the groundwater position
Laboratory Scale Seismic Surface Wave Testing for the Determination of Soil Elastic Profiles
No full textSeismic surface wave testing is well-adapted to the study of elastic parameters and, hence, the elastic profile of soils in the field. Knowledge of a ground’s stiffness profile enables the prediction of ground movement and, thus, the quality of the foundation. The stiffness parameter obtained in this research corresponds to the measurement of the seismic surface wave phase velocity of materials, which relates to the very small strain shear modulus. This paper describes a methodology for performing surface wave testing in the laboratory. In comparison with field tests, a laboratory-scale experiment offers the advantage of allowing the process of data collection to be calibrated, and analytical studies can be carried out as the properties of the material under test are controllable and known a priori. In addition, a laboratory scale experiment offers insight into the interaction between the seismic surface wave, the soil, the boundary and, hence, the constraints associated with the seismic surface wave technique. Two simplified models of different sizes were developed using homogeneous remoulded Oxford Clay (from Midlands region of the UK). The laboratory experimental methodology demonstrated that the seismic surface wave equipment used in the laboratory was directly influenced by the clay properties as well as the size of the test model. The methodology also showed that the arrangement of the seismic source and the receivers had an impact on the range of reliable frequencies and wavelengths obtained. 
Stability Analysis of Weathered Rock Cut Slope Using Geological Mapping and Laboratory Tests
No full textA study on determining the stability of weathered rock cut slope using
geological mapping and laboratory tests. The study is divided into two parts: field
work and laboratory testing. The field study focused on the measurement and
analysis of the orientation and characteristics of discontinuity. Identification of
rock types, weathering grades and observation of cut slope conditions were also
included in the field study. Laboratory testing involved determination of natural
moisture content, particle size distribution and shear strength. Discontinuity data
were analyzed using stereographical method for identification of potential
instabilities. A factor of safety (FOS) analysis was conducted on unstable cut
slopes using SWEDGE software and manual calculation It is found that the
geological mapping and laboratory tests are feasible for assessing slope stability.
The FOS analysis has distinguished 10 slope to be considered as fail whilst the
other 6 are consider stable same as field observation
Seismic evaluation of vibro-stone column
No full textGround improvement work is crucial in enhancing the characteristics of weak soils commonly encountered in Civil Engineering, and one such technique commonly used is vibro-stone columns. An assessment of the effectiveness of such an approach is critical to determine whether the quality of the works meets the prescribed requirements. Conventional quality testing suffers limitations including: limited coverage (both area and depth) and problems with sampling quality. Traditionally quality assurance measurements use laboratory and in-situ invasive and destructive tests. However geophysical approaches, which are typically non-invasive and non-destructive, offer a method by which improvement profiles can be measured in a cost effective way. Of these seismic surface waves have proved the most useful to assess vibro-stone columns, however, to date much of the previous work conducted has focussed on field based observations making detailed evaluation of this approach difficult. This study evaluates the application of surface waves in characterizing the properties of laterally heterogeneous soil, specifically for using in the quality control of vibro-stone column. Three models were employed which began with a simple model and extended finally to complex model: (1) concrete mortar was used to establish the method, equipment and its system, (2) pilot test on a small scale soft kaolin to adopt a model vibro-stone column and (3) main test contained a configuration of vibro-stone column in soft Oxford clay. A generic scaled-down model of vibro-stone column(s) was constructed. Measurements were conducted using different arrays of column configuration, using sand to simulate stone material. This idealized set of laboratory conditions were used to provide guidelines for the interpretation of field measurements. The phase velocity obtained from the controlled tests showed close agreement to those reported in literature and with those generated through empirical correlations with vane shear test. The dispersive curve demonstrated an increased phase velocity with increasing wavelength for the measurements on the clay (between columns), and decreased phase velocity with increasing wavelength for the measurements on the column. More interestingly, the results showed that in the characterization of lateral non-homogeneities, the phase velocity versus wavelength relationship varies on stone columns of different diameters and densities. This illustrated that the shear modulus profiles are influenced by the effective region that spans both the lateral and depth axes, and also demonstrated how the results can be influenced by the positioning of sensors with respect to the survey target. This research demonstrates how Rayleigh waves can be used for quality assurance when constructing vibro-stone columns
Artificial Neural Network in Seismic Reflection Method for Measuring Asphalt Pavement Thickness
No full textA non‐ destructive measurement of asphalt pavement layer thickness using seismic reflection was adopted together with coring test at similar site for comparison. The test was carried out on pavements around university campus’s road to measure the asphalt pavement layer thickness. The on-site seismic reflection testing was carried out using three piezoelectric sensors to capture time travel of wave motion, a light ball bearing to produce a high frequency seismic wave source and a data logger for data acquisition. The data processing is conducted in the time domain exclusively using a feedforward artificial neural network (ANN) using MATLAB
software. A graphical interface is developed for viewing and extracting the result to make the processing of the
seismic data feasible and user-friendly. The seismic reflection method analysis using the ANN successfully measured the asphalt pavement layer thickness. This study of the reflection method for measuring the pavement thickness compared with coring indicates the average accuracy of five testing sites was 93%. It shows that the seismic reflection able to demonstrate the capability to measure thickness of pavement in non-destructive way at a reliable accurac
DETERMINASI DIRI TOKOH UTAMA DALAM SINETRON TENDANGAN SI MADUN SEASON 1 DENGAN ANIMASI CAPTAIN TSUBASA 2018 KAJIAN SASTRA BANDINGAN
No full textNapitu, Estomihi. 2020. "Self Determination of the Main Character in Tendangan Si Madun Season 1 Cinetron and Captain Tsubasa 2018 Animation Comparative Literature Study". Essay. Undergraduate Program in Indonesian Literature. Semarang. Faculty of Humanities, Diponegoro University, First Supervisor Dra. Muh. Abdullah, M.A. Second Supervisor Fajrul Falah, S.Hum, M.Hum. The research object that is used by the author includes Tendangan Si Madun Season 1 cinetron and Captain Tsubasa 2018 animation. The purpose of this research is to describe (1) the structure of TSM Season I cinetron and CT 2018 animation and (2) a comparison of the self-determination of the main character in TSM Season I cinetron with CT 2018 animation. A comparative method is used for this research. The steps used by the author includes data sources, data analysis techniques, and analysis result presentation. The data sources for this research are TSM Season 1 cinetron and CT 2018 animation. The research that has been done shows that the structure of TSM Season 1 cinetron and CT 2018 animation includes: (1) theme; (2) plot; (3) character; (4) setting. According to the structure, the two films have similarities and differences. The similarities lie in the following aspects: (1) theme, these two objects have a soccer theme; (2) plot, these two objects have a different storyline, the plot of TSM Season 1 cinetron uses a reverse plot, while CT 2018 uses a straight plot (progressive); (3) characters, have similarities in roles and functions. Apart from structural aspects, similarities and differences also exist in the aspect of self-determination. The similarities are in the following aspects: (1) competence, the two main characters have good competence resulting from hard training; (2) relatedness, the two main characters have good connections that creates a caring relationship. The differences in self-determination in the two main characters are in the following aspects: (3) Self-autonomy, the main character in the TSM Season 1 cinetron has weak self-autonomy because he is not yet able to make his own choice, while the main character in the CT 2018 animation has strong self-autonomy because he is capable of making his own choice without depending on others.
Keywords: comparison, self-determination, competence, self-autonomy, relatednes
Correlation of Electrical Resistivity Tomography and Geotechnical Field Data for Soil Profile Characterization
No full textThis study looked at the effects of compaction on resistivity values as well as the relationship between different degrees of compaction. The material used in this experiment was laterite soil. The sample was tested into a standard proctor mould. The model has 10.20cm diameter and 11.6 cm for height of the mould. Each sample\u27s resistivity was measured entirely compacted.The resistivity testing in this study were conducted using the Miller 400A. ASTM D 422 Standards were used, and for electrical resistivity testing, ASTM G57 is used. This research emphasises the impact of moisture content on resistivity value, as soil reduces resistivity value when the soil has higher moisture content which is 120 ?m at 37%, and 190 ?m at 25%. By comparing the results of different moisture content of soil samples under varied degrees of compaction, better resistivity interpretation tables may be generated
The Effect of Compaction Towards Resistivity Value
No full textElectrical resistivity tomography is a non-destructive method of site investigation that involves injecting electricity into the sample and measuring subsurface resistance. This study looked at the effects of compaction on soil as well as the relationship between different degrees of compaction of soil and resistivity value. The soil used in this experiment was lateritic soil. The sample was compacted in a standard proctor mould with a diameter of 10.20cm and 11.6 cm height. The soil’s resistivity was measured after the soil was compacted inside the mould. The resistivity testing was conducted using soil resistivity meter model Miller 400A. ASTM G57 was used for electrical resistivity testing. This research emphasizes the impact of compaction on resistivity value, as soil reduces resistivity value when the soil has higher moisture content which is 120 ?m at 37%, and 190 ?m at 25%. By comparing the results of different moisture content of soil samples under varied degrees of compaction, better resistivity interpretation tables may be generated
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