Judul: Dampak Krisis Ekonorni dan Strategi Hidup Rumahtangga Pekerja Sektor Formal dan Informal Pariwisata (Kasus Pantai Pangandaran, Desa Pangandaran, Kecamatan Pangandaran, Kabupaten Ciamis, Propinsi Jawa Barat)
Abstrak: Krisis moneter (krismon) yang diikuti krisis ekonomi menyebabkan sektorsektor perekono~nian lainnya mengalami keterpurukan termasuk sektor pariwisata, hanya sektor pertanian yang mampu tumbuh sebesar 0,2%. Krisis yang tejadi yang diikuti krisis multi dimensi menyehabkan kunjungan wisatawan berkurang. Pada periode 1994-1996 Indonesia merupakan negara dengan tingkat pertumbuhan kunjungan wisatawan yang tertinggi di Asia Tenggara, namun tahun 1997 kunjungan wisatawan hanya 3% dan tahun 1998 turun menjadi -28%. Penelitian ini bertujuan: (1) menganalisis dampak krisis ekonomi terhadap kepariwisataan (2) mengetahui kondisi sosial ekonomi peke j a sektor formal maupun informal di daerah ohjek wisata, (3) mengetahui strategi yang digunakan oleh pekerja untuk bertahan hidup dalam menghadapi krisis ekonomi baik pekerja sektor formal maupun infonnai.
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Judul: Pengaruh Taman Wisata Alam Pangandaran terhadap kondisi sosial ekonomi masyarakat (Studi: Desa Pangandaran, Kecamatan Pangandaran, Kabupaten Ciamis, Provinsi Jawa Barat
Abstrak: Penelitian ini dilakukan selama bulan April 2012 di Desa Pangandaran, Kecamatan Pangandaran Kabupaten Ciamis Jawa Barat. Tujuan penelitian ini: Pertama, mengidentifikasi jenis peluang kerja yang telah diciptakan sebagai hasil kegiatan pariwisata di Pangandaran; Kedua, menganalisis kontribusi penghasilan pekerjaan tersebut terhadap total penghasilan rumah tangga; dan Ketiga, menggambarkan pengaruh kegiatan pariwisata terhadap kehidupan sosial masyarakat setempat. Pendekatan kuantitatif yang didukung oleh data kualitatif diterapkan. Jumlah 63 responden rumah tangga dari berbagai jenis pekerjaan diwawancarai. Bersamaan dengan itu wawancara mendalam yang didukung dengan studi literatur diterapkan. Hasil menunjukkan bahwa, di satu sisi, aktivitas pariwisata Pangandaran telah turut memberikan kontribusi yang signifikan terhadap penciptaan lapangan kerja serta pendapatan rumah tangga Komunitas lokal. Selanjutnya, suasana kerjasama yang baik antar pelaku usaha terjadi di Pangandaran. Namun di sisi lain, pariwisata Kegiatan di Pangandaran nampaknya menimbulkan dampak buruk terhadap kehidupan masyarakat seperti perubahan gaya hidup dan perilaku menyimpang.
Keyword: Tourism; Local communities; Jobs at tourism sector; Household income; Social life

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