Judul: Studi kondisi sanitasi sarana penjualan dan higiene pedagang makanan jajanan di sekolah daerah Bogor
Abstrak: Makanan jajanan yang sudah sangat populer di masyarakat perkotaan masih sering menyebabkan keracunan yang sebagian besar disebabkan oleh praktek sanitasi Jan higiene yang kurang baik dari para pengolah makanan. Oleh, sebab itu penerapan sanitasi dalam penyelenggaraan makanan dalam hal ini khususnya makanan jajanan venting sekali dilakukan karena akan menurunkan adanya risiko penularan penyakit tau terjadinya penyakit serta gangguan kesehatan yang disebabkan atau ditularkan melalui makanan. Penelitian ini bertujuan untuk mengetahui kondisi sanitasi kantin di tiga wilayah yang berada di daerah Bogor, dengan harapan dari data yang diperoleh dapat memberikankan rekomendasi untuk perbaikan kantin dimasa yang akan datang.
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Judul: Praktek higiene dan sanitasi penjual makanan jajanan pada Sekolah Dasar di Wilayah Bogor
Abstrak: Food safety is one important things on food. Wrthout good practice in food safety (hygiene and sanitation) it will be difficult to make safe product. The aim of this study is to know how food safety practices of food vendor in elementary school in Bogor. This study is a part of data baseline "Developing Model of Healthy Food Street Education Based on Elementary School Lever done by Southeast Asian Food And Agricultural Science and Technology (SEAFAST) Center and 'lembaga Penelitian dan Pengembangan Masyarakat lnstitut Pertanian Bogor' (LPPM) IPB. Design of this study is cross section study. The result of this study share that most of the vendor in the canteen and outer canteen have less knowledge and neutral attitude about nutrition and food safety. Half of the vendor in the outer canteen have bad category on food safety practice but half of the vendor in the canteen have enough category on food safety practice. Observation of this food safety practice consist of: personal hygiene, handling and storage food and beverage, facility and equipment sanitation, handling contaminate animal, place and utensil sanitation and application of use additives food. This study suggest that school should make routine monitoring and always give infomiation about nutrition and food safety to improve food safety practices.
Keyword: Hygiene practices, Sanitation, Canteen, Elementary school

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