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<![CDATA[analysis on electromagnetic waves propagation in optical fiber using the Laasonen method finite difference approach ]]>
<![CDATA[Radhiyah Mardhiyah]]>
<![CDATA[ PILLAR OF PHYSICS Vol 4 (2014) ]]>
Publisher : <![CDATA[Department of Physics – Universitas Negeri Padang UNP ]]>
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DOI: 10.24036/1838171074
<![CDATA[Wave Nonlinear Schrodinger (NLS) is a wave that propagates in an optical fiber. NLS wave has a wave with wave propagation characteristics are stable and propagate without change of shape. This study aims to examine and analyze the behavior of wave propagation NLS with the influence wavelengths (Nλ) on its amplitude. Research conducted including the type of basic research using a numerical approach. Used numerical approach is the Finite Difference Laasonen method. Based on the generated soliton solutions, the wave nature of the NLS can be analyzed which shows that large amplitude (A) NLS waves is influenced by the wavelength (λ). Results of programming in the form of a graphic display output and modeling. Modeling results for the NLS equation wavelength waves (N=1) which is comparable to the wavelength of the amplitude values. Modeling results for the wavelength variation (N=2) also showed that the wavelength is proportional to the amplitude]]>
<![CDATA[Rock structure estimation using smoothness-constraint least-squares inversion data geolistric resistivity of schlumberger configuration in Bukit Lantiak Padang Selatan ]]>
<![CDATA[Rahmi Kurnia Putri]]>
<![CDATA[ PILLAR OF PHYSICS Vol 4 (2014) ]]>
Publisher : <![CDATA[Department of Physics – Universitas Negeri Padang UNP ]]>
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DOI: 10.24036/1846171074
<![CDATA[A research about rocks structure has been done in Bukit Lantiak Padang Selatan. The aim of this research are determine kinds of rocks, rocks structure and model 3D spread of rocks in landslide area, Bukit Lantiak. This research use a Resistivity Geoelectrical method with Schlumberger Configuration. Data were collected by ARES Multielectrode in 4 lines. The data were interpreted by Least-Squares inversion to obtain a 2D model and 3D model of earth’s surface that consists of depth and resistivity value. The result of this research showed that the kinds of rocks in this area consist of Andesite, Clay, Sandstone and Limestone. Generally rock structure in this area consists of Sandstone at depth 6 m from surface , next layer consists of Limestone at depth more than 5,3 m, Clay was found at depth 34, 4 m until 43,4 m and the last layer was found Andesite. Model 3D showed that Sandstone and Clay found in all area, Limestone found in Southwestern, Andesite found in northeaster of research location]]>
<![CDATA[Determination of basic rock depth using Marquardt inversion based on schlumberger configuration geolistric resistivity data in Kampung Manggis village, Padang Panjang Barat ]]>
<![CDATA[Herawati Herawati]]>
<![CDATA[ PILLAR OF PHYSICS Vol 4 (2014) ]]>
Publisher : <![CDATA[Department of Physics – Universitas Negeri Padang UNP ]]>
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DOI: 10.24036/1837171074
<![CDATA[The purpose of this basic research are to describe the resistivity and the depth of basement rocks in Kampung Manggis Padang Panjang Barat. The depth of basement rocks are important to anticipate the landslide in the research area. This research use the exploration methods. The measurement use resistivity geoelectrical method with Schlumberger configuration. The techniques of analysis data use Marquardt inversion with initial damping factor 0,1 and minimum damping factor 0,001. The analysis of the data generating 2D cross section below the earth surface. The interpretation of the data generating the depth and the types of basement rocks. The result of this research show the type of basement rocks in Kampung Manggis Padang Panjang Barat is an igneous rock groups, namely Andesite. The resistivity of this andesite is 170,1–1658 Ωm. The depth of basement rocks below the earth surface varies, which generally more than 8 m deepness around Kampung Manggis Padang Panjang Barat area]]>
<![CDATA[Fabrication of statical friction coefficient determination system in inclined plane using microcontroler ]]>
<![CDATA[Maisa Fitri]]>
<![CDATA[ PILLAR OF PHYSICS Vol 4 (2014) ]]>
Publisher : <![CDATA[Department of Physics – Universitas Negeri Padang UNP ]]>
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DOI: 10.24036/1841171074
<![CDATA[Research has been done to design a system of determination of the static friction coefficient of the object on inclined plane digitally. The purpose of this research is to explain the performance specifications, accuracy and precision of the system. There are three results of this research. First, The system is designed with the surface of the slip object size 8.7 x15 cm and glide plane 9 x 100 cm. Second, average of precision relative sensor accelerometer is 95,58%. Third, average accuration is 0,977]]>
<![CDATA[Fabrication of analog signal interface system into digital data for fluxgate sensor vibration ]]>
<![CDATA[Devi Sidiq]]>
<![CDATA[ PILLAR OF PHYSICS Vol 4 (2014) ]]>
Publisher : <![CDATA[Department of Physics – Universitas Negeri Padang UNP ]]>
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DOI: 10.24036/1845171074
<![CDATA[The purpose of this research is to develop an interface communication between vibration measuring device that has analog signals (voltage) with a personal computer, and process its received data to become digital signals data that can be presented. The USB based communication with low speed (1,5 Mbit/s) and full speed (12 Mbit/s) were used interface communication. This research is categorized as laboratory experimental research. Measuring and colleting data were directly collected from vibration measuring device. The maximum sensitivity resolution of the vibration measuring device due to amplitude is 2.19 x 10-3 cm. The processing of received data to become digital signals used MPLAB X IDE for microcontroller program and C# program for creating window application. Digital data layout from the same vibration with different distance of source already showed different input source]]>
<![CDATA[Analysis of ground water distribution using robust constrain inversion determination geoelectric data of wenner configuration type in Bukit Lantiak, Padang Selatan District ]]>
<![CDATA[Silvia Dona Sari]]>
<![CDATA[ PILLAR OF PHYSICS Vol 4 (2014) ]]>
Publisher : <![CDATA[Department of Physics – Universitas Negeri Padang UNP ]]>
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DOI: 10.24036/1851171074
<![CDATA[The aimed of this research are to determine the distribution, depth, and types of groundwater aquifers in Bukit Lantiak Padang Selatan area. Distribution of groundwater in Bukit Lantiak are important to know to anticipated landslide cause increase in soil water content in the slope. This research used resistivity geoelectric method of Wenner configuration. Data of this research taken four tracks using ARES (Automatic Resistivity). Interpretation data was done by with Robust Constraint inversion. The results of this research showed that distribution of soil water on Tracks 1, 3, and 4 tend to lead from the Northeast to the Southwest. Distribution of groundwater in track 2 leads from West to East. Into the ground water ranged from 5.76 to 30.2 m were obtained. Type aquifer is an aquifer that is found free and depressed. Free aquifers that can trigger landslides from on track 1]]>
<![CDATA[Relatioship between basic composition of magnetic mineral and magnetic suseptibility value of guano from Bau Bau cave East Kalimantan. ]]>
<![CDATA[Nurul Garnetsya D Rusli]]>
<![CDATA[ PILLAR OF PHYSICS Vol 4 (2014) ]]>
Publisher : <![CDATA[Department of Physics – Universitas Negeri Padang UNP ]]>
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DOI: 10.24036/1843171074
<![CDATA[Identification of magnetic susceptibility value and element composition of this research is done by guano sample from Bau-Bau caves in East Borneo. This cave topography is far from human activity and there is no volcano around it. This topography conditions will effects to the transportation process of magnetic mineral into caves area. Magnetic mineral characterization such as magnetic susceptibility and element composition could show the enviromental changes in the cave at the time of guano deposition process. This research aims to determine the elemental composition of the basic constituent asociation of magnetic mineral to the magnetic susceptibility values of guano samples. Determination of magnetic susceptibility value done by using Susceptibility Meter, whereas to determine the element composition we use the X-ray Fluorescences (XRF). Data analisys is done by using the plotting of data from elemental composition of the fourth group in the transition graph. Thus it making visible the relation between the value of the magnetic susceptibility with the basic elements magnetic up the composition of magnetic minerals in perticular Fe, then we could seen the composition of Fe proportional to the magnetic susceptibility value. Fe composition will appears in high presentation on the time of susceptibility value is high and will appears in low presentation when the susceptibility values is low. An the other hand, element composition of the fourth group in the transition except Fe with magnetic susceptibility value is not really appears]]>
<![CDATA[Analysis of daily rainfall to determine the pattern of madden julian oscillation (MJO) phenomenon in the areas around the Indonesian equators ]]>
<![CDATA[Afni Nelvi]]>
<![CDATA[ PILLAR OF PHYSICS Vol 4 (2014) ]]>
Publisher : <![CDATA[Department of Physics – Universitas Negeri Padang UNP ]]>
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DOI: 10.24036/1844171074
<![CDATA[Madden Julian Oscillation (MJO) plays an important role as the Intraseasonal Variaton (ISV) that can affect the amount of rainfall. Knowing phenomena of oscillation as the MJO provides benefits to determine the approximate rainfall in the foreseeable future. Therefore, the authors are interested in researching on daily rainfall analysis to determine the pattern of the phenomenon of MJO in the area around the Equator Indonesia including Padang, Pekanbaru, Pontianak and Palu in 2003-2012. This research is descriptive research. This research data is a daily rainfall data for areas of Padang, Pekanbaru, Pontianak and Palu of the years 2003-2012. The data processing is done using Microsoft Excel, Weighted Wavelet Z-Transform (WWZ) and surfer 8. Based on the results of data processing, Padang and Pontianak having a pattern of rainfall equatorial, Pekanbaru having a pattern of rainfall monsunal while Palu having the pattern of rainfall pattern local. A pattern of oscillations MJO in the field and Pekanbaru active in phase 3, in Pontianak active in phase 4 and in the Palu active in phase 5. Impacts generated oscillations MJO in phase active is rainfall will high in the area which behind him during propagation of the Indian Ocean to the Pacific Ocean. The accident time MJO in Padang are more dominant than to the areas of Pekanbaru, Pontianak and a Palu, with 36 times. MJO in Pekanbaru happens as many as 15 times, in Pontianak happens as many as 26 times and in the Palu happens as many as 16 times]]>
<![CDATA[Prototype of temperature and time rushing control system of soybeans boiling process for tofu manufacture based on AT89S52 microcontroller using IC LM35 ]]>
<![CDATA[Afdi Marta]]>
<![CDATA[ PILLAR OF PHYSICS Vol 4 (2014) ]]>
Publisher : <![CDATA[Department of Physics – Universitas Negeri Padang UNP ]]>
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DOI: 10.24036/1848171074
<![CDATA[The objective of these research are to determine the transfering function and sensitivity of the sensor IC LM35, to describe the physical shape and dimensions of the system controlling the temperature and time in the process of boiling porridge of soy, and to determine the static of characteristics of temperature control system based on microcontroller AT89S8252 with LM 35 sensors for boiling the soy porridge process. This research can be classified into engineering research. Data collection techniques are both direct and indirect measurement. Direct measurement ise used to measurement the temperature of soy porridge process. On other hand, indirect measurement is used to determine the accuracy and precision of the system in the manufacture of soy porridge boiling out. Based on the analysis of the data can be presented three results of research. First, the voltage output temperature sensor IC LM 35 is directly proportional to temperature. Second, description and temperature control system that describe each part of the system. Finally, instrument temperature control has a very high accuracy and precision of 96.96% on average.Keywords: Prototipe, Controlling System, Temperature, Time, Soy boiling , IC LM35]]>
<![CDATA[Study of groundwater pollution by leachate using the least-square smoothness-constraints inversion method geoelectric resistivity of configuration schlumberger in case study of final waste disposal (TPA) Air Dingin ]]>
<![CDATA[Yosi Permata Sari]]>
<![CDATA[ PILLAR OF PHYSICS Vol 4 (2014) ]]>
Publisher : <![CDATA[Department of Physics – Universitas Negeri Padang UNP ]]>
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DOI: 10.24036/1850171074
<![CDATA[The final processing place of waste that open,in generally result leachate. The leachate uncontrolled will leak everywhere, so that can affect condition of groundwater around the landfill. The aim of this research is to determine contaminantion of groundwater by leachate in that area. This research use resistivity geoelectrical method with Schlumberger configuration. Data are colected in four track by ARES (Automatic Resistivity meter). Data are interpreted by the Smoothness Constraints Least Squares inversion method to obtain models of 2D the earth's surface. The result of this research showed that there has been contamination of groundwater by leachate in Air Dingin landfilling. Groundwater contamination occurs on every track measurement, except on track 2. Contamination was identification in the depth of 5,00-23,30 m with resistivity value less 10 Ωm.]]>
