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"Perbaikan citra anomali medan magnet total gunung ungaran telah dilaksanakan dengan mereduksi anomali ke bidang datar dan kutub utara medan magnet bumi menggunakan metode sumber ekivalen dwi-kutub . Reduksi anomali ke bidang datar atau ke kutub utara dilaksanakan bersamaan dengan proses kontinuasi dan interpolasi secara simultan. Hasil perbaikan citra memperjelas kenampakan dan posisi anomali yang berbentuk dwi-kutub pasca reduksi ke bidang datar atau eka-kutub pasca reduksi ke kutub utara sehingga mudah dan lebih terpercaya untuk diinterpretasi."

"Pengujian tingkat ketelitian metode reduksi anomali medan magnetik total bumi ke kutub utara menggunakan sumber ekivalen dipol berbasis model komputasi telaah prisma tegak. Ketidakrataan permukaan topografi, variasi dimensi sumber anomali (distrubusi magnetisasi) dan ketidakteraturan distribusi titik pengukuran tidak berpengaruh secara signifikan terhadap ketelitian metode. Tingkat ketelitian metode sangat tergantung pada kedalaman lapisan sumber ekivalen dipol. Batas atas dan bawah kedalaman lapisan sumber ekivalen dipol tergantung pada spasi pengukuran. Batas atas kedalaman lapisan sumber ekivalen dipol dengan penyimpanan rata-rata di bawah 10 % berkisar 3 kai spasi pengukuran sedang batas bawah kedalaman lapisan sumber ekivalen dipol tergantung pada dimensi sumber anomali "

"Telah dibuat prototipe Data Akuisisi Sistem Observatori Medan Magnet Bumi berbasis PC dengan mikrokontroler AVR Atmega32 sebagai unit akuisisi data. Tujuan dari pembuatan alat ini untuk mempermudah dalam proses pengamatan, pengambilan data Medan Magnet Bumi untuk diolah lebih lanjut oleh Data logger, komunikasi serial dengan komputer dilakukan melalui USART. Program pengendali mikrokontroler dibuat menggunakan bahasa pemograman Bascom dan C, disisi komputer menggunakan program Labview untuk menampilkan data real time. Selanjutnya data diproses untuk mendapatkan tingkat gangguan yang terjadi selama proses pengamatan Medan Magnet Bumi dinyatakan dalam K indeks, Sehingga pengamatan Observatori Medan Magnet Bumi akan lebih efisien.

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It has been made Data Acquisition System of Observatory Earth Magnetic Field base on PC with microcontroller AVR ATmega32 as data acquisition unit. The purposed of this project is easily in processing for data observation and collecting of earth magnetic field for analyzing more advances by data logger. Serial communication with computer using USART. The Programming of microcontroller using Bascom and C language, other side of computer using LAB View to display real time data. The data whose stored can be processed to get degree of disturbance on going as long as observation of magnetic earth field which obviously in K index until more efficient."

"The previous research used geomagnetic method on 36 sample located in Mataram with radius 5x5kms2, have resulted isogram map that clearly indicated extreme magnetic dipole of 70.383,4nT(03535 '05, 34 " LS ll6`§07?22,8"BT at Karang Kemong) and -26_395,5m" (0ti*'37't5,2" LSl l 6° 05 'l L6 "BT at Asrama Haji, Jalan Lingkar Selatan). This value has been corrected with IGRF of45.000nT1 This paper will report the results of advance research to identify the sources of the extremegeomagnetic anomaly. The method used in this research is making a comparison between geomagneticanomaly value and gravity anomaly value (Bouguer anomaly); also the values of geomagnetic anomalyrecorded in several places that have been predicted or proven had mineral/ores potency Besides that, ageologic prediction will be made based on geo-electric survey at center of positive and negative anomaly.This research shows that there is correlation between low Bouguer anomaly (l40mGaU and positivegeomagnetic anomaly (70.3 83, 4nT), in the other hand high Bouguer anomaly (1 50mGaU correlated withpositive geomagnetic anomaly (-26.395,5nD. Besides that, the value of geomagnetic anomaly inMataram higher than those of other locations that have been predicted or proven had mineral/orespotency. Geo-electric method applied on bath maximum points of anomaly give a result that the mostprobable source of geomagnetic anomaly in Mataram is substructure that contains much fresh water(highly productive aquifer) or specific stricture of stone with magnetic property that must be studiedintensively."

"Material lapisan Ni80CoxFe20-x (x = 0, 5, 10, 15, dan 20) disintesis dengan metode elektrodeposisi pada substrat ITO-PET. Struktur kristal, fasa material, sifat magnetik dan perubahan resistivitas akibat pengaruh komposisi Ni80CoxFe20-x diteliti melalui karakterisasi X-Ray Diffractometer (XRD), Scanning Electron Microscope (SEM), Energy Dispersive Spectroscopy (EDS)-Mapping, Vibrating Sample Magnetometer (VSM), dan metode Four-Point Probe pada Cryogenic Magnetometer (Oxford Teslatron Instrument). Hasil XRD menunjukkan struktur kristal FCC dengan space group Fm3m. Komposisi dari seluruh sampel mencapai komposisi target (dengan toleransi ±5) dan homogenitas yang baik melalui karakterisasi EDS-Mapping dan SEM. Hasil VSM menunjukkan seluruh sampel merupakan material soft feromagnetik pada suhu ruang. Seluruh sampel berhasil menghasilkan lapisan dengan saturasi magnetisasi >80 emu/gram dan nilai koersivitas <250 Oe. Kelima sampel memiliki rentang saturasi magnetisasi dari 90,387-159,792 emu/g dan koersivitas dari 95,84-191,33 Oe di mana saturasi magnetisasi tertinggi terjadi pada komposisi Ni80Co10Fe10 sedangkan koersivitas terendah terjadi pada komposisi Ni80Co15Fe5. Pengujian nilai resistivitas listrik terhadap perubahan temperatur (5-300 K) menunjukkan bahwa seluruh sampel bersifat konduktor dikarenakan nilai resistivitasnya meningkat seiring dengan meningkatnya temperatur. Hasil penelitian ini menunjukkan bahwa komposisi suatu material memengaruhi sifat magnetik dan nilai resistivitasnya. Komposisi lapisan Ni80CoxFe20-x (x = 0, 5, 10, 15, dan 20) yang memiliki fasa tunggal, lapisan yang homogen, komposisi yang mencapai target, bersifat soft magnetic dengan koersivitas rendah (<250 Oe) dan saturasi magnetisasi yang tinggi (>80 emu/gram) serta perubahan resistivitas yang kecil terhadap temperatur adalah x = 15, yaitu Ni80Co15Fe5.

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Films of Ni80CoxFe20-x (x = 0, 5, 10, 15, and 20) was synthesized by electrodeposition method on ITO-PET substrate. The crystal structure, material phase, magnetic properties and change of resistivity as a result of composition changes on Ni80CoxFe20-x was characterized by X-Ray Diffractometer (XRD), Scanning Electron Microscope (SEM), Energy Dispersive Spectroscopy (EDS)-Mapping, Vibrating Sample Magnetometer (VSM), and Four-Point Probe Method using Cryogenic Magnetometer (Oxford Teslatron Instrument). XRD results show FCC crystal structure with the Fm3m space group. The composition of all samples was successfully close to the target composition (with ±5 tolerance) and even homogeneity through EDS-Mapping and SEM. VSM results show that all samples are soft ferromagnetic in room temperature. All samples successfully achieve saturation of magnetization >80 emu/gram and coercivities <250 Oe. All samples resulted with saturation of magnetization ranging from 90,387-159,792 emu/g and coercivity ranging from 95,84-191,33 Oe where the highest saturation of magnetization was found at the composition of Ni80Co10Fe10 while the lowest coercivity was found at the composition of Ni80Co15Fe5. Characterization of resistivity values under the influence of temperature change (5-300 K) shows that all samples are conductors because of the increase of resistivity values when temperature is increased. The result of this experiment shows that the composition of a material affects the magnetic properties and resistivity value. The composition of Ni80CoxFe20-x (x = 0, 5, 10, 15, dan 20) films that has a single phase, uniform film, composition that reaches the target, is soft magnetic with low coercevities (<250 Oe) and high saturation of magnetization (>80 emu/gram), and low resistivity value change under the influence of increased temperature is x = 15, that is Ni80Co15Fe5."

"ABSTRACTPenentuan harga opsi penting untuk meningkatkan pendapatan untuk keperluan investasi. Pada skripsi ini, metode dimension reduction Monte Carlo diimplementasikan pada model six-factor cross currency untuk menentukan harga opsi Eropa. Model six-factor cross currency merupakan suatu model berdimensi tinggi yang biasa diselesaikan menggunakan metode Monte Carlo. Akan tetapi, metode Monte Carlo membutuhkan jumlah simulasi yang besar.  Dimension Reduction Monte Carlo merupakan suatu pendekatan yang digunakan untuk mereduksi jumlah dimensi pada model berdimensi tinggi secara one-way coupling. Metode tersebut dapat digunakan untuk mereduksi dimensi dari model six-factor cross currency dari 6 menjadi 1. Melalui pendekatan dimension reduction, hanya satu variabel yang perlu diaproksimasi. Pada kasus tersebut, dipilih variabel variansi dari spot foreign exchange rate dan nilainya diaproksimasi menggunakan metode Milstein.

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ABSTRACTOption pricing determination is important in order to increase profit for investment. In this thesis defend, the dimension reduction Monte Carlo method is implemented to determine put and call European option pricing under a six-factor cross currency model.  A six-factor cross currency model is a high-dimensional model which is usually solved using Monte Carlo. However, Monte Carlo requires hugh numbers of simulations. Dimension reduction Monte Carlo is an approach for reducing the dimension of high-dimensional models with one-way coupling. It can be applied to reduce the dimension of six-factor cross currency from 6 to 1. By the dimension reduction approach, only the factor that is conditioned on is needed to be approximated. In this case, the variance of spot foreign exchange rate is chosen as the factor that is conditioned on and its value is approximated using the Milstein method."