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"ABSTRAKPada skripsi ini akan dibabas tentang aualisa basil perhihmgan lcuat medan dari daerah kexja stasiun PUIIIBIICBI' televisi dengan menggunakan model simulasi , yaim UTD modiiiknsi wedge tlmggal.Metode perhimngan kuat medan yang digunakan adalah Urzgfbmz Geometrical Theory 0fD11f}?d£fiO!2 wedge tlmggal, kmenapadametodelersebut dapal dikembnngknn sebagai model simulasi pengukuran kuat medan pada komputer biasa atau yang lebih kompleks.Penguknnm kuaimedan pada daerah kexja stasiun pemancar televisi diharapkan memberikan hasil yang tidak jauh berbeda dengan perhiilmgan dari model simulasi, tetapi terkadang terdapat perbedaan , sehingga perlu diketahui penyebab perbedaan basil perhihmgan kuzn medan tersebut.Aplikasi dari analisa perbandingan hasil perhitlmgan kuat medsn ini adalah sebagai bahan studi banding penggunaan model U'I'D modiiikasi wedge tnnggal dalam meneutulcan prakiraan hasil perhitungan kuat medan di daerah kmja stasiun pemancar televisi tertentu.Dari analisa dan kesimpulan akhir dari makalah ini didnpat hasilperhihmgun kuat medan pada model U'I'Dmodiiikasiwedge tunggal dengan harnga ketingian pembanding tertentu untuk mendekati kondisi profil permukaan pads pengukuran lapangan.

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"ABSTRAKMetoda gaya berat secara cepat dapat digunakan dalam eksplorasi untuk mengetahui daerah jebakan baluan kontak yang terkaolinisasi ataupun cekungan tua yang diperkirakan mengandung mineral yang bernilai ekonomis.Untuk pemisahan anomali regional-sisa diterapkan metoda pencocokan permukaan ( surface fitting ) menggunakan polinomial non-ortogonal dalam koordinat " geografi " X dan Y yang dikenal sebagai Trend Surface Analysis.Penafsiran data gaya berat menggunakan pemodelan tiga dimensi metoda Talwani & Ewing dilakukan untuk mendapatkan model geometri bawah permukaan di daerah penelitian ( Pemali-Bangka ), dengan ditunjang oleh data geologi daerah tersebut sebagai data kontrol.Hasil pemodelan menggunakan metoda Talwani dan Ewing membuktikan aclanya struktur jebakan kontak antara granit dan metasedimen. Batuan kontak ini berbentuk topi ( kopula ) yang menutupi tonjolan granit. Batuan kontak ini secara geologi banyak mengandung timah.

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ABSTRACT

The Gravity methods are used for preliminary in geophysical interpretation to delineate mineral deposit.

The surface fitting method using non-orthogonal polynomial was applied for separation of the regional-residual anomaly in the geographical coordinate (){,Y) which is known as Trend Surface Analysis.

The gravity data interpretation was used by three dimensional model of Talwani & Ewing ( 1960 ) to obtain the geometrical model of anomaly body under surface at the research area in Pemali-Bangka, this interpretation is supported by the geological map of the area as the reference.

The result by this method showed that there is a structure between the granite and metasedimen. This structures form a cap covered the granite intrusion that geologically contain tin deposit. ;The Gravity methods are used for preliminary in geophysical interpretation to delineate mineral deposit."

"ABSTRACTBeberapa tahun kebelakang ini telah terjadi pertumbuhan yang sangat cepat di bidang komunikasi radio dan teknologi nirkabel. Seiring munculnya layanan baru, divais nirkabel, dan peningkatan jumlah data yang ditransmisikan antara sesama pengguna divais nirkabel, maka optimasi sistem komunikasi nirkabel di suatu area geografis sangat dibutuhkan. Salah satu caranya adalah dengan membuat model propagasi gelombang. Skripsi ini membahas model propagasi gelombang radio pada lingkungan microcellular menggunakan metode ray tracing. Metode ray tracing yang berdasarkan geometrical optics GO dan uniform theory of diffraction UTD , digunakan untuk menghitung rugi-rugi lintasan sepanjang jalur tertentu pada lingkungan line-of-sight LOS maupun non-line-of-sight NLOS . Konfigurasi dan parameter yang digunakan bertujuan untuk mengetahui karakteristik propagasi gelombang berdasarkan material pemantul, tinggi antena, lebar jalan, frekuensi karir dan jenis polarisasi yang digunakan. Berdasarkan hasil simulasi diperoleh bahwa frekuensi karir yang digunakan memiliki pengaruh yang signifikan terhadap nilai rugi-rugi lintasan, kemudian ketika tinggi antennapemancar meningkat, makabreakpoint meningkat sehingga tingkat atenuasi daya berkurang. Diperoleh path loss exponent pada skenario urban canyon berkisar pada 1.1 hingga 2.1. Diperoleh pula hasil simulasi dengan metode ray tracing pada skenario yang spesifik memiliki kecocokan dengan urban microcellular UMi path loss model. Pada area Nihonbashi diperoleh nilaipath loss exponent pada kisaran 1.5 hingga 2.3 dan pada lingkungan Fakultas Teknik Universitas Indonesia pada kisaran 1.3 hingga 2.1.

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ABSTRACTIn the past few years there has been a very rapid growth in the field of radio communications and wireless technology. As new services emerge, wireless devices, and an increase in the amount of data transmitted between wireless device users, the optimization of wireless communications systems in a geographical area is needed. One way is to make wave propagation model. This thesis discusses radio wave propagation model in microcellular environment using ray tracing method. The ray tracing method based on geometrical optics GO and uniform theory of diffraction UTD , is used to calculate track losses along certain paths in line of sight LOS and non line of sight NLOS environments. The configuration and parameters used to find out the wave propagation characteristics based on reflector material, antenna height, road width, career frequency and type of polarization used. Based on the simulation result, it is found that the career frequency used has a significant influence on the path loss value, then when the transmitter height increases, the break point increases so that the power attenuation level decreases. It is obtained that the path loss exponent in the urban canyon scenario ranges from 1.1 to 2.1. The simulation results obtained by ray tracing method in a specific scenario have a compability with urban microcellular UMi path loss model. In the Nihonbashi area the path loss exponent value is obtained in the range 1.5 to 2.3 and in the environment of the Faculty of Engineering University of Indonesia in the range of 1.3 to 2.1."

"This book is about how to use CGAL two-dimensional arrangements to solve problems. The authors first demonstrate the features of the arrangement package and related packages using small example programs. They then describe applications, i.e., complete standalone programs written on top of CGAL arrangements used to solve meaningful problems, for example, finding the minimum-area triangle defined by a set of points, planning the motion of a polygon translating among polygons in the plane, computing the offset polygon, finding the largest common point sets under approximate congruence, constructing the farthest-point Voronoi diagram, coordinating the motion of two discs moving among obstacles in the plane, and performing Boolean operations on curved polygons. "

"New approaches to knot insertion and deletion are presented in this unique, detailed approach to understanding, analyzing, and rendering B-spline curves and surfaces. Computer scientists, mechanical engineers, and programmers and analysts involved in CAD and CAGD will find innovative, practical applications using the blossoming approach to knot insertion, factored knot insertion, and knot deletion, as well as comparisons of many knot insertion algorithms. This book also serves as an excellent reference guide for graduate students involved in computer aided geometric design."

"This paper proposes a novel approximation for a Spatial Time Division Multiple Access (STDMA) link-scheduling algorithm based on geometrical node exploitation to improve spatial reuse performance. The geometrical location of nodes was exploited in order to reduce computational complexity and to achieve higher accuracy in transmission to satisfy the Signal to Interference and Noise Ratio (SINR) requirement. The process of SINR global checking is a main constraint in the SINR based interference model but is reduced through geometrical partition and interference approximations based on geometrical node locations. Simulation results show that the proposed algorithm increases the spatial reuse performance in comparison to the greedy physical interference model in similar scenarios. The model utilizing geometrical partition exhibits lower complexity compared to the pure physical interference model that includes SINR global checking."

"Jakarta Timur memiliki jumlah kecelakaan lalu lintas tertinggi dibandingkan kota-kota lain di Jakarta selama beberapa tahun terakhir, menunjukkan perlunya peningkatan keselamatan lalu lintas, terutama untuk mobilitas aktif. Berbagai proyek telah dilaksanakan di Jakarta untuk meningkatkan serviceability bagi pejalan kaki dan pengguna sepeda untuk mendorong kebiasaan mobilitas aktif. Namun, hal itu masih belum diterapkan di Jakarta secara keseluruhan. Tulisan ini bertujuan untuk melakukan perbaikan lalu lintas pada simpang tidak aman tertentu di Jakarta Timur. Persimpangan sendiri dipilih sebagai pejalan kaki dan pengguna sepeda adalah yang paling rentan saat menggunakannya. Melalui studi banding kasus, makalah ini diharapkan dapat menentukan desain geometris persimpangan yang sesuai untuk meningkatkan keamanannya bagi pergerakan pejalan kaki dan sepeda, dengan tetap mempertahankan kinerjanya, seperti kapasitas, derajat kejenuhan, dan tundaannya. Studi menunjukkan bahwa peningkatan geometris persimpangan dengan beberapa penyesuaian meningkatkan kemudahan servisnya untuk mobilitas aktif.......East Jakarta has the highest amount of traffic accident than other cities in Jakarta for the last few years, indicating the need of traffic improvement on their safety, particularly for active mobility. Various projects have been implemented in Jakarta to improve its serviceability for pedestrian and bicycle user to drive the habit of active mobility. However, they still not have been implemented in Jakarta as a whole. This paper aims to do traffic improvement on a particular unsafe intersection in East Jakarta. Intersection itself is chosen as pedestrian and bicycle user are the most vulnerable when using it. Through comparative study cases, this paper is expected to determine appropriate junction geometrical designs that improve its safety for pedestrian and bicycle movement, while maintaining its performance, such as its capacity, degree of saturation, and delay. The study shows that junction geometrical improvement with several adjustments improves its serviceability for active mobility."

"The expanded 4th edition of this classic optics text is aimed at those wishing to apply their knowledge of optics to engineering problems, and provides a sound introduction to the basic principles of optics for engineering students. It describes fundamental material including Fourier optics, diffraction theory, geometrical optics, and lenses, and goes on to cover important topics such as optical signal processing, holography, tomography, optical communication, electro- and acousto-optic devices, integrated optics, 3D imaging and optical distance measurement."