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Abstrak :
Pada tulisan ini dilaporkan hasil penelitian tentang pengaruh penskalaan pada arah lateral dan vertikal terhadap frekuensi cutoff (ft) dan frekuensi osilasi maksimum (fmax) HBT SiGe. Penelitian dilakukan dengan cara simulasi menggunakan perangkat lunak komersial Bipole3 v5.3.1G. Metode penelitian yang dilakukan diuraikan berikut ini. Pertama, menentukan suatu struktur divais acuan dan parameter-parameter fisika yang akan digunakan sebagai masukan simulator. Kedua, melakukan penskalaan pada arah lateral dengan cara memperkecil lebar emiter, lebar divais dan luas divais. Lebar emiter disesuaikan dengan teknologi litografi yang ada saat ini yaitu 0,25  m, 0,18m, 0,12m dan 0.09m. Ketiga, melakukan penskalaan pada arah vertikal. Pada penelitian ini penskalaan pada arah vertikal dibatasi pada penskalaan basis. Dari hasil penelitian diketahui bahwa penskalaan lebar emiter pada arah lateral dapat meningkatkan fmax secara nyata sedangkan pengaruhnya terhadap ft sangat kecil. Penskalaan pada arah lateral tidak mempengaruhi besarnya tegangan breakdown kolektor-emiter BVceo. Penskalaan pada arah vertikal lebih berpengaruh pada HBT SiGe dengan dimensi lateral lebih luas dibandingkan pada HBT SiGe yang mempunyai dimensi lateral lebih kecil.

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Abstract
The effects of lateral and vertical scaling to the SiGe HBT cutoff frequency (ft) and maximum frequency of oscillation (fmax) performances are reported. Device simulation software for bipolar devices Bipole3 v5.3.1G is used to help us in this work. The research methodology is as follows. First, we determined the reference device structureand the physical model parameters. The second was lateral scaling. In this step, the emitter finger width, device width and device area were shrink. The emitter finger width was scaled consistent to the lithography technology developments from 0.25m to 0.18m,0.12mand 0.09m. The third was vertical scaling. In this step the base width of SiGe HBTs with different lateral dimension was reduced from 39nm to 32nm. The effect of increasing Ge mol fraction to the SiGe HBT frequency performance were also observed. The results show that emitter width scaling in lateral direction has strong effects to the fmax and only has weak effects to ft. Lateral scaling has no effect to the collector-emitter breakdown voltage BV ceo. Vertical scaling has stronger effect to the SiGe HBT with larger lateral dimension than devices with smaller lateral dimension.

Abstrak :
Banyaknya pemakaian beban tak linier di dalam konsumsi energi listrik menyebabkan tingkat kandungan harmonisa semakin tinggi dalam sistem tenaga listrik. Dewasa ini kondisi demikian sudah menjadi masalah yang sangat serius karena dapat menurunkan kualitas daya sistem tenaga listrik dan berdampak negatif terhadap peralatan yang terpasang. Tapis daya aktif telah dianggap sebagai solusi alternatif yang paling efektif sehingga banyak dihasilkan prototip baik skala laboratorium maupun implementasi lapangan. Karakteristik penapisan dari tapis daya aktif sangat ditentukan oleh metoda pengendaliannya yang umumnya memerlukan deteksi tegangan dan arus. Dari penelitian-penelitian yang telah dikembangkan dapat diketahui bahwa kondisi tegangan sumber sangat berpengaruh terhadap karakteristik penapisan. Pada makalah ini diuraikan bagaimana kondisi tegangan sumber mempengaruhi karakteristik penapisan tapis daya aktif shunt untuk sistem tiga fasa tanpa atau dengan konduktor netral. Dalam sistem empat kawat dengan konduktor netral maka pemakaian deteksi informasi fasa dapat dipergunakan untuk mengatasi pengaruh kondisi ketidak seimbangan amplituda dan distorsi tegangan sumber.Dari simulasi dan pengujian laboratorium diperoleh hasil yang mengarah pada kesimpulan yang sama dan metoda ini berhasil dengan baik.

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Abstract
The great number use of nonlinear loads in consuming electric energy results in harmonic contained level in power system increased. Recently, such a condition has become very serious for it is able to deteriorate power system quality and create negative impacts on installed equipments. Active power filters are alternative solutions so that they have been designed as laboratory and site scaled equipments. Filtering characteristic of active power filter is determined by its control method which commonly needs detections of voltage and current quantities. Based on the previous researches, it can be known that the filtering characteristic is significantly influenced by the source voltage condition. This paper describes how far the source voltage condition influences the characteristic of a shunt active power filter for three-phase systems with or without neutral conductor. In four wires system with neutral conductor then the phase detection is proposed to solve the problem unbalanced and distortion source voltages. It could be shown that the result of simulation and laboratory experimental is convergence and this methode give a good results.

Abstrak :
Algoritma Harmony Search merupakan algoritma metaheuristik yang diperkenalkan oleh Zong Woo Geem pada tahun 2001 dan terinspirasi dari proses improvisasi musik, dimana para musisi berusaha untuk memperbaiki nada sehingga menghasilkan kumpulan nada membentuk harmoni terbaik. Dalam skripsi ini algoritma Harmony Search digunakan dalam penyelesaian permainan Sudoku. Permainan Sudoku merupakan suatu permainan penempatan angkaangka 1 hingga 9 pada matriks berukuran 9 × 9 dengan syarat di tiap baris, tiap kolom dan di tiap sembilan submatriks ukuran 3 × 3 berisi semua angka 1 hingga 9 tepat satu kali.

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Harmony search algorithm is a Methaheuristic algorithm. It was introduced by Zong Woo Geem in 2001, which get the inspiration from the process of music improvisation, where musicians improvise their instruments? pitches searching for a perfect state of harmony. In this small thesis, harmony search algorithm used for solving of Sudoku game. Sudoku game is a game that put numbers start from 1 until 9 into a 9 × 9 matrix according to the rules that each row, each column, and each of the nine 3 × 3 sub matrix that compose the matrix contains all of the number from 1 to 9 at once.

Abstrak :
This book provides a modern introduction to harmonic analysis and synthesis on topological groups. It serves as a guide to the abstract theory of Fourier transformation. For the first time, it presents a detailed account of the theory of classical harmonic analysis together with the recent developments in spectral analysis and synthesis.

Abstrak :
This book provides a thorough investigation of the theory and applications of time and band limiting, and develops the tools for applications in communications engineering, as well as optical engineering, geosciences, planetary sciences, and biomedicine.

Abstrak :
The emphasis in both of these volumes is on the use of stochastic, geometric, and group-theoretic concepts in the modeling of physical phenomena. Volume 2 builds on the fundamentals presented in Volume 1, delving deeper into relationships among stochastic geometry, geometric aspects of the theory of communications and coding, multivariate statistical analysis, and error propagation on Lie groups. Extensive exercises, motivating examples, and real-world applications make the work suitable as a textbook for use in courses that emphasize applied stochastic processes or differential geometry.