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"The main contribution of this article is the mapping of the electric fields in transmission powerlines using the Charge Simulation Method (CSM), combined with an embedded system. In this research, a computational routine was written in MATLAB®. The electric field intensity is calculated at a 1 meter height on right-of-wayand between towers. The mapping is performed for a space between towers and considers that the maximum arrow of the conductors occurs in the middle of this distance, what provides a computational result where the profile of the electric field can be analyzed. The bundle conductor height varies along the distance between towers in order to improve the values of the calculated field. The results can be seen in different graphics (three-dimensional, bi-dimensional, a slice of the field and others). Charge Simulation Method is a power tool for calculating intensity field of high voltage systems, so this is a motivation for the use of the method. A series of detectors are used to obtain the data of the voltage that is provided to the load. These data are captured by a microcontroller and transmitted to the operational center. Using this data, the measure of the field is possible."

"The main contribution of this article is the mapping of the electric fields in transmission power lines using the Charge Simulation Method (CSM), combined with an embedded system. In this research, a computational routine was written in MATLAB®. The electric field intensity is calculated at a 1 meter height on right-of-way and between towers. The mapping is performed for a space between towers and considers that the maximum arrow of the conductors occurs in the middle of this distance, what provides a computational result where the profile of the electric field can be analyzed. The bundle conductor height varies along the distance between towers in order to improve the values of the calculated field. The results can be seen in different graphics (three-dimensional, bi-dimensional, a slice of the field and others). Charge Simulation Method is a power tool for calculating intensity field of high voltage systems, so this is a motivation for the use of the method. A series of detectors are used to obtain the data of the voltage that is provided to the load. These data are captured by a microcontroller and transmitted to the operational center. Using this data, the measure of the field is possible."

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"ABSTRACTFabrikasi mikro adalah ilmu yang saat ini penting untuk dikembangkan. Salah satu metode yang dapat digunakan dalam fabrikasi mikro adalah Biomachining. Biomachining adalah suatu metode machining untuk produk berskala mikro yang prosesnya menggunakan mikroorganisme yaitu bakteri Acidithiobacillus ferroxidans. Pengembangan krakteristik proses biomachining pada beragam material telah dilakukan. Dalam meningkatkan hasil kualitas proses biomachining dan efektifitas dalam melakukan percobaan proses biomachining, Salah satu cara yang dapat dilakukan adalah membuat permodelan atau simulasi proses biomachining dengan bantuan software pada computer. Software Simulasi ini dapat digunakan menggunakan basis MATLAB. Informasi yang dapat ditunjukkan yaitu lebar celah pemakanan, kedalaman pemakanan, bentuk profil permukaan benda kerja, dan kekasaran benda kerja. Software simulasi ini dilakukan validasi menggunakan material tembaga Polycrystalline dengan parameter waktu biomachining selama 6 jam dan 14 jam dan juga parameter agitasi sebesar 150 rpm dengan waktu biomachining selama 24 jam dan 100 rpm dengan waktu biomachining selama 48 jam. Pada hasil validasi kedalaman simulasi tingkat kekasaran berkisar antara 48.17 hingga 2.33. Selain itu, hasil validasi lebar celah simulasi memiliki tingkat kekasaran dari 3.22 hingga 9.16. Tingkat kesalahan pada nilai kekasaran benda kerja pada program simulasi bervariasi dari 2.16 hingga 24.99. semakin kecil nilai kedalaman maka tingkat kesalahan akan relative semakin besar.

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ABSTRACTMicrofabrication is the science that important to be developed. One of the methods that can use in microfabrication is biomachining. Biomachining is machining method for produce the micro product which process using microorganism. That microorganism is Acidithiobacillus ferroxidans. Development of characteristic of Biomachining process has been done in various material. Kind of method to Increase quality and effectivity of process biomachining experiment such as design and developing simulation software of process biomachining. One of Software that can designing and developing this simulation is MATLAB. User can get the information of profile of surface of the specimen, depth of cut, and width of Narrow Path of the specimen from this simulation. Validation for this software simulation using Copper Cu Polycrystalline with 6 and 14 hours of machining time and also with 150 rpm of the agitation parameter within 24 hours biomachining time and 100 rpm of the agitation parameter within 48 hours biomachining time. The Results of validation illustrate the range error of depth of cut of specimen from 48.17 until 2.33. The result of width of the narrow path of the specimen give the error range from 3.22 until 9.16. For the roughness of the specimen is variate from 2.16 until 24.99. Smaller value from the depth of cut and the roughness will increase relative error."

"Pengolahan data transient elektromagnetik bertujuan mendapatkan sifat fisis batuan berdasarkan resistivitas terhadap kedalaman, yang nantinya akan dianalisa untuk mengetahui daerah prospek hidrokarbon. Tahpan dalam pengolahan data untuk mendapatkan nilai resistivitas terlebih dulu mendapatkan nilai resistivitas semu. Nilai resistivitas semu pada metode Transient Electromagnetic (TEM) dapat ditentukan dengan menggunakan beberapa formula yang dikembangkan oleh Kaufman & keller, Zonge, Fitterman & Stewart, dan Cristensen. Dalam proses pemilihan formula TEM yang digunakan analisa dengan mencari perbedaan relative dengan bantuan dari data sintetik, fonnula Fitterman & Stewart memiliki nilai perbedaan relatifitas 0,37%. Korelasi nilai resistivitas dilakukan dengan membandingkan nilai resistivitas yang didapat hasil perhitungan berdasarkan formula TEM dengan nilai resistivitas semu yang diperoleh dari hasil pemodelan l dimensi dengan software LOTEM maupun dengan software IX1D. Proses automatisasi dibuat bertujuan untuk melakukan efisiensi dalam proses perhitungan nilai resistivitas semu dengan software Matlab inenggunakan aplikasi GUIDE Pemodelan 1 dimensi yang di gabungkan dari bebarapa titik sounding bertujuan mendapatkan profil resistivitas yang nantinya akan memberikan informasi bawah permukaan. Dari profil resistivitas semu terhadap kedalaman terlihat adanya struktur yang berupa antiklin pada daerah 500-3000m dengan kedalaman 1000an meter. Pada daerah struktur antiklin terlihat nilai resistivitas yang tinggi mengindikasikan kemungkinan adanya hidrokarbon.

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Processing of transient electromagnetic data to obtain physical properties of rocks based on the resistivity with depth, which will be analyzed to determine areas of hydrocarbon prospects. Stages in data processing to obtain resistivity values first obtaining apparent resistivity value. Value of apparent resistivity on the method of Transient Electromagnetic (TEM can be determined by using some formula that was developed by Kaufman & Keller, Zonge, Fitterman & Stewart, and Cristensen. In the process of choice formula used TEM analysis by looking for relative dwerences with the heha of synthetic data, Fitterman & Stewartls formula has the value 0.3 7% dwerence relativity. Correlation of resistivity values is done by comparing the obtained resistivity values calculated based on the formula TEM apparent resistivity value obtained from the one-dimensional modeling software or with software IXID LOTEM. Automatic process is made aimed at improving efficiency in the process of calculating the value of apparent resistivity with Matlab software using GUIDE aplication. Modeling one- dimensional in combination of Many diagnostic point to obtain a profile of resistivity sounding which will provide subsurface information. From the profile of apparent resistivity with depth seen in the form of the anticline structure in the 3,000 m with a depth of 500-meter 1000an. At the regional anticline structure visible high resistivity values indicate the possibility of hydrocarbons."