Judul: Peranan Radio Siaran dalam Pengembangan Masyarakat (Studi  Kasus: Radio Pertanian Ciawi, Kecamatan Ciawi, Kabupaten  Bogor, Jawa Barat)
Abstrak: Penggunaan media massa merupakan suatu sarana yang sangat efektif dalam proses pembentukan opini publik (public opinion) dan mengembangkan persepsi masyarakat. Media massa terdiri dari berbagai bentuk yaitu buletin, koran, televisi, maupun radio. Diantara berbagai bentuk media massa tersebut, radio memiliki karakteristik yang unik, sehingga menjadikannya sebagai media yang banyak digunakan masyarakat. Saat ini radio sangat populer di masyarakat, dengan pendengarnya yang spesifik karena kemampuannya yang luar biasa untuk menciptakan ”theatre of the mind” dala m pikiran pendengarnya. Radio juga memiliki kemampuan mengirimkan transmisi dengan jangkauan yang sangat luas sehingga menjangkau daerah-daerah secara luas.
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Judul: Pengaruh Program Siaran Radio Pertanian Ciawi Bagi Pendengarnya (Kasus Pendengar di Desa Cileungsi, Kecamatan Ciawi, Kabupaten Bogor)
Abstrak: This research aimed to analize the influence of radio programs towards listeners. These research goals are: (1) to analyze listeners exposure towards radio programs and it’s assessment towards radio programs (2) to analyze factors that effect radio programs exposures towards listeners and the assessment of radio programs by listeners (3) to analyze the influence of radio programs towards listeners and factors that influencing it. The result show that listeners exposure towards radio programs and it’s assessment towards radio programs were influenced by listeners characteristic. Among several variables of listeners characteristic that have significant relation towards radio programs exposure is mass media ownership with listening duration. Meanwhile, listeners characteristics which have a relation with listeners assessment towards radio programs are mass media ownership with the assessment of radio broadcasting material, the announcer, and the duration of the programs, the age of listeners and it’s assessment towards the radio programs are broadcasted, listeners occupation and it’s assessment towards radio broadcasting material and how its been presented. The results also shows that the radio programs that have been broadcasted gave several effects. The Effect of radio programs towards listeners are the increasing of cognitive and affective aspects.
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Judul: The Construction of Greedy SVP LLL Algorithm
Abstrak: A lattice is a set of all integer linear combination of a set of linearly independent vectors in ℝ𝑛���. The independent vectors are called bases of lattice. Any lattice can be generated from many bases, and these bases have the same cardinality. In the lattice, the most fundamental and renowned problem is the Shortest Vector Problem (SVP). SVP is a tracking problem of the shortest nonzero vector in a lattice with equivalent bases. In two dimensions, SVP problem has resolved exactly by Gauss’ algorithm. When the lattice dimension is higher than two, A.K. Lenstra, H.W. Lenstra and L. Lovasz gave a LLL algorithm to compute approximation of nonzero shortest vector in the lattice. Reduced bases solution obtained from LLL algorithm still be an approximation and has polynomial running time of arbitrary dimension which large enough. In 1994, Schnoor and Euchner modified this LLL algorithm as a new variant which later was named deep insertion LLL algorithm. This algorithm is a modified version of the LLL algorithm to the terms of the exchange step to improve the accuracy of output of LLL reduced bases and applying it to the subset sum problem. The purpose of this research are: (1) Reconstruct the LLL algorithm and deep insertion LLL algorithm using a geometric approach. (2) Construct a greedy SVP LLL algorithm. (3) Implement the three algorithms in a symbolic programming language, and evaluate them experimentally. A bases ℬ=[𝐛���1,𝐛���2,…,𝐛���𝑛���] in ℝ𝑚��� is called reduced LLL with parameter 𝛿��� if satisfies: (a) |𝜇���𝑗���𝑖���|≤12, for every integer 𝑖���,𝑗��� with 1≤𝑖���<𝑗���<𝑛���. (b)𝛿���‖𝜋���𝑗���(𝐛���𝑗���)‖2≤‖𝜋���𝑗���(𝐛���𝑗���+1)‖2, for 𝑗���=1,2,…,𝑛���−1,where 𝛿��� is a reduced parameter of real numbers with 14<𝛿���<1. The first requirement is the reduced basis 𝛿��� must “nearly orthogonal” and in its computation case, this requirement can be reached out by using the Gram-Schmidt’s orthogonalization. While the second requirement is called exchange step, or used to called as Lovasz condition. By using both of these requirements, then they establish the LLL algorithm. Then, Schnoor and Euchner modify the LLL algorithm based on the requirements of the exchange step called the deep insertion LLL algorithm, where the exchange step is based on the comparison of the projected vector in orthogonal complement [𝐛���1,𝐛���2,…,𝐛���𝑘���−1]⊥ after j-th reduction. To construct greedy SVP LLL algorithm, the requirements of the exchange step is based on purely by comparing norm of lattice 𝐛���𝑗��� with norm lattice 𝐛���𝑖��� for 𝑖���=1,2,3…,𝑗���−1. The process of insertion reduced vector after the exchange step also has done greedily. Then, we calculate the number of arithmetic operation in greedy SVP LLL algorithm for further analysis. The result of our exprimentation for three algorithms on the certain matrix size shows that the running time of the three algorithms increases propotional to the size of the matrix. The result also shows that by using 𝛿���=34 for the LLL algorithm and the deep insertion LLL algorithm, and the greedy SVP LLL algorithm which is a new variant made by using no parameter of 𝛿���, outperform of the other of two previous algorithm in terms of speed with the same output.
Keyword: LLL algorithm, LLL deep insertion algorithm, greedy SVP LLL algorithm