Judul: Optimasi Layout Komponen Satelit Mikro Menggunakan Algoritme Genetika
Abstrak: Penempatan komponen dalam sebuah kontainer termasuk kategori permasalahan non-deterministic polynomial-time hard (NP-hard) yang dalam teori kompleksitas komputasional sangat sulit dipecahkan. Permasalahan ini umumnya dikenal sebagai layout optimization problem (LOP). Penelitian optimasi layout dalam tesis ini mengambil studi kasus layout komponen satelit mikro. Layout komponen satelit mikro tersebut harus memenuhi persyaratan muatan misi, wahana peluncur dan pengendalian sikap. Strategi terbaru untuk mencari layout yang optimal dari berbagai kemungkinan adalah menggunakan algoritme genetika yang dikombinasikan dengan order-based positioning technique (OPT) sehingga kemungkinan solusi sama dengan permutasi sejumlah komponennya. Setiap komponen diberi indeks kemudian ditempatkan dalam kontainer berdasarkan urutan tertentu sesuai dengan algoritme penempatan yang sudah dibangun. Sementara itu, urutan penempatan tersebut dibangkitkan oleh algoritme genetika yang mengeksplorasi berbagai kemungkinan hingga diperoleh urutan yang menghasilkan individu (solusi) terbaik. Algoritme genetika dalam optimasi layout ini menggunakan jumlah populasi, probabilitas penyilangan dan probabilitas mutasi yang teruji secara statistik menghasilkan individu terbaik. Pendekatan ini telah teruji validitasnya dan terbukti menghasilkan layout yang optimal.
Keyword: optimasi layout, algoritme genetika, satelit mikro

Judul: Algoritma genetika untuk manajemen transponder satelit komunikasi
Abstrak: The aim of the research was to develop an optimization model, which is able to optimize transponder capacity based on their parameters, namely: gain flatness, bandwidth, linearity of amplifier, power flux density and characteristic of ground segment. The characteristic as a function of antenna diameter, power transmit, modulation, and forward error correction code rate. The genetic algorithm optimizer have been developed, was able to find 8.88% higher cumulative data rate (capacity) than conventional one. Also, it can prove that the impact of gain flatness is reducing (1.71%) the capacity of transponder. This system needs a uniform antenna diameter of earth stations. The larger antenna of earth station, the higher capacity of transponder. For coming research, it is suggested to design a system that has an un-uniform diameter antenna of earth station, and to optimize the power of transmitter and figure of merit to support the optimal transponder capacity.
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Judul: Gambaran Kalsium dan Fosfor Darah Sapi Perah FH (Friesian Holstein) pada Masa Pertumbuhan
Abstrak: The aim of this study was to know the profile of calcium and phosphorus in blood of FH (Friesian Holstein) dairy cow during growth. Twenty five serum samples were collected from healthy dairy cows that divided into five groups. Each group consisted of five dairy cows are differentiated by age, one month, three months, six months, nine months, and twelve months. Blood sampels were taken from the jugular vein, calcium and phosporus of the serum were examined using spectrophotometry. The results showed levels of calcium in blood of dairy cow ranging from 7,5±0,38 to 8,7±0,07 mg/dl. The highest calcium of blood levels was obtained from dairy cows at age three months. Levels of phosphorus in blood of dairy cow ranging from 3,3±1,15 to 6,5±1,75 mg/dl. The highest of phosphorus blood levels was obtained from dairy cows at age six months. The lowest of calcium and phosphorus blood levels was obtained from dairy cows at age nine months.
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