Judul: Sudoku Tereduksi dan Grup Simetri Sudoku
Abstrak: Sudoku is a logic game in form of square games consisting rows, columns and mini grids. In this game, the square is filled by numbers from 1 to . At this game, the player plays the game precisely because each cell in a row or column should have a unique number. The mini grid should have no repeated numbers. This research proves that to determine the number of the isomorphic Sudoku solutions from given Sudoku solutions can be calculated using reduced Sudoku. Sudoku symmetry group is a collection of Sudoku solutions that is experienced symmetry group operations. Symmetry group operation is an operation permutation consisting permutation values, stack permutations, permutations band, column permutations on the stack, or row permutations of the band. The isomorphic Sudoku solutions from reduced Sudoku can be obtained from symmetry group operation imposed on Sudoku reduced. The total possible Sudoku solutions calculated from the number of given reduced Sudoku.
Keyword: sudoku symmetry group, reduced sudoku, isomorphic

Judul: Penyelesaian Puzzle Sudoku Menggunakan Pemrograman Linear Integer
Abstrak: Sudoku can be viewed as a puzzle in mathematics. Players must fill in a n2 × n2 matrix which is containing some given enteries, so that each row, column, and n × n mini grid contains each integer 1 through n2. The objectives of this research are to study the traditional Sudoku puzzle, Sudoku X puzzle (diagonal Sudoku) and use branch and bound method, to find the relation between the number of possible solution with the size of sudoku, and the number quantity givens. The solutions are determined using branch and bound method that was implemented on m-file script. We can find the relation between the number of possible solution with the size of sudoku, and the number quantity givens. On the other hand, we can not find such relation for general size of sudoku and general configuration
Keyword: Bogor Agricultural University (IPB), branch and bound, linear integer, Sudoku

Judul: Studi Kelayakan Pendirian Pabrik Minyak Daun Cengkeh (Eugenia aromatica) di Kabupaten Halmahera Barat.
Abstrak: Clove leaf oil is an essential oil which derived from clove leaf. Clove leaf oil is used as a raw material by the industry because of the high content of eugenol. This research aims to provide an overview of information and feasibility of establishment clove leaf oil factory. The method used is the method of investment feasibility analysis. Market demand of clove oil higher than its supply. The capacity of clove leaf oil factory planned 2 tons of dried clove leaf/day, location in District Jailolo, West Halmahera. Investment required is about 722 million rupiah and working capital is about 165 million rupiah. Investment criteria indicates the value of Net Present Value is Rp 586 milion, IRR 20%, B/C Ratio 1.71, and Pay Back Period is 4 years and 3 months. Break-even point is reached when the sale of clove oil as much as 13 tons. The sensitivity analysis shows that the industry is feasible when the maximum decrease in production capacity is 6,85%, the maximum decrease of selling price is 4,1%, and the maximum increase purchase price of leaf clovers is 16,3%. Based on the results of research, the clove leaf oil factory is feasible for built in West Halmahera.
Keyword: Clove leaf oil, essential oil, feasibility studies, west halmahera