Judul: Identifikasi protozoa parasitik pada tinja banteng jawa (Bos javanicus) di Semenanjung Ujung Kulon
Abstrak: Penelitian ini dilakukan untuk mengidentifikasi protozoa parasitik tinja Banteng Jawa (Bos javanicus) di Semenanjung Ujung Kulon. Tinja yang ditemukan berjumlah 33 sampel dari 16 blok pengamatan dan diawetkan dengan kalium bikharbonat (K2Cr2O7) 2%. Tinja diperiksa dengan menggunakan metode pengapungan garam jenuh dan diperiksa di bawah mikroskop cahaya pembesaran 200X untuk menentukan jenis protozoa parasitik. Protozoa parasitik diidentifikasi berdasarkan morfologi dan ukuran untuk menentukan genusnya. Hasil pengamatan menunjukan semua sapel yang diperoleh positif terdapat protozoa parasitik. Berdasarkan identifikasi pada tinja Banteng ditemukan empat genus protozoa parasitik. Berdasarkan identifikasi Balantidium, Cryptosporidium, Eimeria dan Entamoeba. Secara keseluruhan protozoa parasitik yang paling dominan ditemukan adalah Cryptosporidium.
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Judul: Identifikasi nematoda parasitik saluran pencernaan dan penyebarannya pada Banteng Jawa (Bos javanicus) di Semenanjung Taman Nasional Ujung Kulon
Abstrak: Penelitian ini dilakukan untuk mengidentifikasi nematoda parasitik dari feses Banteng Jawa (Bos javanicus) di Semenanjung Taman Nasional Ujung Kulon. Feses yang ditemukan dan diperiksa berjumlah 33 sampel. Teknik Parasitologi yang dipakai adalah pemeriksaan natif, pemeriksaan McMaster dan identifikasi larva secara visual. Uji natif dilakukan untuk menentukan jenis telur cacing nematoda pada feses segar (< 3 jam). Metode McMaster digunakan untuk menghitung jumlah telur per gram feses (EPG). Identifikasi larva secara visual dilakukan untuk menentukan larva cacing nematoda parasitik dari jenis telur Strongyloid dengan ciri-ciri yang sesuai. Identifikasi telur dan larva nematoda parasitik menentukan genus dari nematoda parasitik.
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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