Judul: Kajian pengaruh konsentrasi bahan pengawet dan jenis kemasan terhadap daya simpan jamur tiram putih (Pleurotus ostreatus) pada penyimpanan suhu rendah
Abstrak: Jamur tiram putih (Pleurotus ostreatus) merupakan jamur pangan yang cukup baik kandungan gizinya. Kandungan iemak jamur tiram putih antara 1.08 - 9.4 %. Kandungan protein bervariasi dari 8.9 38.7 %. Total asam amino esensial pada jamur tiram putih adalah 33.5g/100g protein kasar. Jamur tiram putih merupakan sumber beberapa vitamin, meliputi thiamin, riboflavin, niasin, biotin dan asam askorbat. Kerusakan jamur tiram putih dapat disebabkan oleh mikroorganisme, reaksi biokimia (pencoklatan enzimatis) dan kimia (pencoklatan nonenzimatis) serta kerusakan fisik. Jamur tiram putih yang tidak diberi perlakuan (dibiarkan pada suhu ruang) hanya dapat bertahan satu hari dan setelah itu tidak layak lagi untuk dikonsumsi. Sulfur dioksida dan garamnya merupakan bahan pengawet yang dapat menghambat reaksi pencoklatan dan enzimatik. Pengawetan dengan sulfit akan memberikan ketahanan serangga, kapang dan khamir. warna dan menghambat pertumbuhan..dst
Keyword: jamur tiram putih, botani, perkembangbiakan, kandungan gizi

Judul: Kandungan zat gizi pada penyimpanan dan pengolahan rebus dan tumis serta daya terima konsumen terhadap hasil olahan jamur tiram putih (Pleurotus ostreatus)
Abstrak: Jamur tiram putih (Pleurotus ostreatus) merupakan salah satu jenis jamur yang dapat dikonsumsi. Beberapa nama lain yang digunakan untuk menyebut jamur tiram putih adalah jamur mutiara, jamur kayu, atau jamur Shimeji. Jamur ini dikonsumsi karena mempunyai citarasa yang enak dan kandungan gizinya yang lengkap. Kandungan proteinnya 10,5 persen per berat kering (Mendel, 1898 dalam Bano dan Rajarathnam, 1982). Selain itu juga mengandung zat gizi lain yang lengkap seperti lemak, karbohidrat, dan beberapa vitamin dan mineral. Kebanyakan zat gizi dapat rusak ataupun mengalami penyusutan ketika makanan disimpan ataupun diolah. Dengan membandingkan beberapa macam cara penyimpanan dan cara pengolahan, dapat diketahui penyusutan zat gizi terkecil. Dengan demikian diharapkan dapat diketahui sumbangan zat gizi yang sebenarnya dari jamur tiram putih terhadap konsumen.
Keyword: Jamaur tiram putih, Pleurotus ostreatus

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