Judul: The Influence of Parental Attachment and Friendship Quality on Adolescents Character in Bogor City.
Abstrak: Karakter yang terbentuk pada diri seseorang dipengaruhi oleh berbagai aspek baik dari dalam maupun dari luar diri seseorang. Keluarga dan teman sebaya merupakan lingkungan terdekat bagi seorang remaja yang memengaruhi pembentukan karakternya, salah satunya melalui kelekatan yang diberikan orang tua dan kualitas pertemanan yang dimiliki oleh remaja. Penelitian ini bertujuan untuk menganalisis pengaruh kelekatan orang tua dan kualitas pertemanan terhadap karakter remaja di Kota Bogor. Penelitian ini menggunakan metode purposive sampling dengan melibatkan 229 responden yang merupakan siswa SMA dari empat sekolah di Kota Bogor yang masing-masing terdiri dari dua sekolah di Kecamatan Bogor Tengah dan di Kecamatan Bogor Selatan. Responden pada penelitian ini didominasi oleh siswa perempuan dengan persentase sebesar 60,7 persen, sedangkan responden laki-laki sebesar 39,3 persen. Hasil penelitian menemukan adanya hubungan antara kualitas pertemanan dengan karakter yang dimiliki remaja dan secara konsisten, peningkatan kualitas pertemanan memengaruhi peningkatan karakter. Sementara itu, pada kelekatan orang tua tidak ditemukan adanya hubungan dan pengaruh terhadap karakter remaja di Kota Bogor., The character that is formed in a person is influenced by various aspects both from within and from outside a person. Family and peers are the closest environment for a teenager that influences the formation of his character, one of which is through the attachment provided by parents and the quality of friendship owned by adolescents. This study aims to analyze the influence of parental attachment and friendship quality on the adolescent character in Bogor City. This study used a purposive sampling method involving 229 high school respondents from four schools in Bogor City, each consisting of two schools in Central Bogor Subdistrict and South Bogor Subdistrict. Respondents in this study were dominated by female students with a percentage of 60.7 percent, while male respondents amounted to 39.3 percent. The results found that there was a relationship between the quality of friendship and character possessed by adolescents and consistently, an increase in the quality of friendship influenced the improvement of character. Meanwhile, on parental attachment, there was no relationship and influence on the character of adolescents in Bogor City.
Keyword: Adolescents, Character, City, Friendship quality, Parental attachment

Judul: Pengaruh metode sosialisasi dan kelekatan ibu terhadap karakter remaja di kelurahan Situ Gede Kota Bogor
Abstrak: tua dalam mensosialisasikan nilai kebaikan. Penelitian ini menggunakan desain cross sectional study dan bertujuan untuk menganalisis pengaruh metode sosialisasi dan kelekatan ibu terhadap karakter remaja. Kerangka contoh penelitian adalah keluarga utuh dengan anak pertama usia remaja (13-15 tahun) yang tinggal di Kelurahan Situ Gede, Kecamatan Bogor Barat, Kota Bogor. Contoh diambil sebanyak 50 keluarga secara purposive untuk dilakukan wawancara terhadap ibu dan anak. Hasil uji hubungan menunjukkan bahwa semakin baik metode observational yang disosialisasikan ibu dan semakin tingginya kelekatan ibu maka semakin baik pula karakter remaja. Hasil uji pengaruh menunjukkan bahwa hanya kelekatan ibu yang memiliki pengaruh nyata terhadap karakter remaja dalam model., The decreasing values of character among teenagers can be caused by the role of parents to socialize values of kindness. This study used cross-sectional design and aimed to analyze the influence of socialization methods and mother’s attachment on characters among teenagers. Sample frames of this research were families with first child as teenagers (13-15 years) who has been lived in the Situ Gede Village, Sub District West Bogor, Bogor City. This research involved 50 samples that taken purposively and interviewed by using questionnaire. The correlation result showed significantly that the better the method of observational and the higher mother’s attachment, it was likely the better character of teenagers. Regression analysis showed that only mother’s attachment that had significant influence on character of teenagers in the model
Keyword: karakter remaja, kelekatan ibu, metode sosialisasi

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