Judul: Pertumbuhan Jamur Kuping (Auricularia auriculae) dan Jamur Tiram (Plerotus ostreatus) dalam Rumah Tanaman dengan Suhu Terkendali
Abstrak: Rumah tanaman yang dirancnag denan sistem pengontrolan suhu secara otomatik merupakan suatu penerapan teknologi modern dibidang pertanian. Salah satu kondisi pertanian yang pertumbuhan dan perkembangannya dipengaruhi oleh suhu udara adalah jamur. Saat ini komoditas jamur sangant digemari dan banyak dibudidayakan karena kandungan nilai gizinya yang tinggi. Jenis jamur yang sudah banyak dibudidayakan di Indonesia adalah Jamur Kuping dan Jamur Tiram.
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Judul: Pengendalian Suhu pada Rumah Tanaman Jamur dengan Sistem Kendali Fuzzy
Abstrak: Teknik budidaya pada rumah tanaman telah banyak diterapkan dalam kegiatan pelianian dewasa ini. Dengan teknik budidaya ini telah terbukti lebih efisien terhadap penggunaan lahan, proses dan waktu pengerjaannya. Dalam penerapannya ada beberapa hal yang perlu diperhatikan, salah satunya adalah pengendalian suhu ruangan yang dapat dilakukan secaJ·a manual atau otomatis. Perkembangan komputerisasi yang sangat pesat menuntut pengendalian dilakukan secara otomatis. Pengendalian ini memerlukan suatu sistem yang dapat menteljemahkan pemikiran manusia yang bersifat linguistik ke dalam bentuk yang dapat diolah dan disimpan oleh komputer. Logika fuzzy merupakan sistem pengendalian yang mempunyai cakupan penerjemahan masalah yang lebih luas dan dapat menghasilkan keluaran yang lebih teliti. Tujuan penelitian ini adalah menerapkan sistem logika fuzzy untuk mengendalikan suhu pada rumah tanaman jamur dan mengamati kelembabannya, serta evaluasi pengontrolan berdasarkan kondisi on/off blower, daya dan energi dihubungkan dengan kondisi peliumbuhan jamur sehingga diperoleh suhu optimal untuk membudidayakannya.
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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