Judul: Consumer Nutritional Behavior on Packaged Yoghurt Drinks in Bekasi City
Abstrak: Yoghurt merupakan produk minuman kemasan yang berbahan dasar susu dan sudah melalui proses fermentasi. Yoghurt memiliki peranan penting untuk kesehatan terutama saluran pencernaan. Tujuan penelitian ini adalah mengetahui perilaku gizi konsumen minuman yoghurt kemasan pada masyarakat Kota Bekasi. Desain penelitian ini yaitu cross sectional study dengan 166 responden dari Kota Bekasi. Hasil penelitian menunjukkan bahwa sebagian besar responden memiliki pengetahuan gizi dan sikap gizi tentang yoghurt dengan kategori tinggi. Sikap konsumen terhadap produk yoghurt X dan yoghurt Z termasuk dalam kategori sangat baik. Hasil uji hubungan antara pengetahuan gizi dan sikap gizi menunjukkan bahwa terdapat hubungan signifikan yang cukup dan searah antara pengetahuan gizi dengan sikap gizi. Hasil uji hubungan dengan frekuensi konsumsi yoghurt menunjukkan bahwa terdapat hubungan yang signifikan antara pendapatan perbulan, usia, jenis kelamin, pengetahuan gizi, dan sikap gizi terhadap frekuensi konsumsi minuman yoghurt., Yoghurt is a packaged beverage product made from milk and has gone through fermentation process. Yoghurt has an important role for our health especially for digestive tract. The purpose of this study is to know consumer nutritional behavior on packaged yoghurt drinks in Bekasi City. The design of this study is cross sectional study with 166 respondents from Bekasi City. The results showed most of the respondents has a high category of nutritional knowledge and nutritional attitude. Consumer attitude against the Yoghurt X and Yoghurt Z belongs to the very good category. The results from relationship test shows that there is a suf icient one way significant relationship between nutritional knowledge and nutritional attitude. The results from another relationship test shows that there is a significant relationship between monthly income, age, gender, nutritional knowledge, and nutritional attitude with frequency of yoghurt drinks consumption.
Keyword: Yoghurt, Nutritional Behavior, Nutritional Knowledge, Nutritional Attitude

Judul: Consumer's Knowledge and Preference of Yogurt Products in Jambi City
Abstrak: Yogurt merupakan olahan susu fermentasi yang memiliki banyak manfaat bagi tubuh, sehingga dijadikan sebagai produk pangan fungsional. Tujuan penelitian ini untuk mengetahui tentang pengetahuan dan preferensi konsumen terhadap produk yogurt di Kota Jambi. Data dikumpulkan dari 100 responden yang ditentukan dengan metode Purposive Sampling. Data dideskripsikan dan dianalisis menggunakan bantuan Microsoft Excel 2013 dan program Statictical Package for the Social Sciences. Hasil menunjukkan konsumen yogurt di Kota Jambi mayoritas perempuan (70%), berusia ≤ 20 tahun (53%), pendidikan terakhir SMA (64%) dengan status pekerjaan sebagai pelajar atau mahasiswa (84%) yang berpenghasilan <Rp 1.000.000,- per bulan (52%). Masyarakat Kota Jambi mengetahui yogurt dari iklan di televisi/baliho/dll (68,75%) dengan alasan konsumsi rasanya yang enak (51,25%). Konsumsi yogurt secara rutin setiap bulan (58,75%), membeli di supermarket/minimarket (96,25%), mengonsumsi secara langsung (78,75%), menyukai yogurt cair (81,25%) yang dikemas menggunakan botol plastik (60%), dan rasa buah (83,75%). Konsumen menyukai yogurt sebagai camilan (77,5%) yang diminum langsung (86,25%) dengan penyimpanan di kulkas (± 4 ºC) (88,75%). Masyarakat Kota Jambi yang mengonsumsi yogurt memiliki pengetahuan yang kurang baik terhadap produk yogurt (40,6%) karena banyak yang belum mengetahui tentang pembuatan yogurt dan informasi seputar Nomor Kontrol Veteriner (NKV), sehingga belum mempertimbangkan NKV saat memilih yogurt. Faktor-faktor yang memengaruhi preferensi konsumen pangan asal hewan secara berurutan dari yang terbesar yaitu adanya logo halal, adanya masa kadaluarsa, kebersihan tempat berjualan, dan adanya logo NKV., Yoghurt is a fermented dairy product with a lot of benefits to our body, thus it was categorized as a functional food. This paper is aimed to assess the degree of consumers knowledge and their preference of yoghurt products in Jambi City. The research uses 100 samples of people that determined with Purposive Sampling method. Data were presented descriptively and analyzed using Microsoft Excel 2013 and Statistical Package for Social Sciences. The result shows that yoghurt consumers at Jambi City are mainly females (70.00%), aged ≤ 20 years old (53.00%) with a background of high school graduates (64.00%) and currently occupied as students (84.00%) with monthly incomes less than Rp 1.000.000 (52.00%). Study found that people from Jambi knows about yoghurt mainly from TV and billboards (68.75%) with a reason of good taste (51.25%). The majority consumes routinely once in a month (58.75%) consumed directly (78.75%), often buys from supermarket/minimarket (96.25%), preferably thin yoghurt rather than thick and creamy (81.25%), packed in a plastic bottle (60%) with fruit-based flavors (83.75%). Consumers like yoghurt as a beverage (77.50%) and drink directly (86.25%) from a refrigerator (± 4 ºC) (88.75%). Consumers from Jambi have a poor knowledge around yoghurt products (40.60%) because a lot of them have not known about yoghurt manufacture and the information about Veterinary Control Number (NKV), thus not considering NKV as a factor of choosing the products. Factors affecting consumers preferences on choosing animal source foods (ASF)—sorted from the most significant—are the halal logo, expiration date, the hygiene of the store, and the NKV logo.
Keyword: konsumen, nomor kontrol veteriner, pengetahuan, preferensi, yogurt, consumer, knowledge, preference, veterinary control number, yoghurt

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