Judul: Keanekaragaman Herpetofauna di Areal PT Indocement Tunggal Prakarsa, Tbk Plant Palimanan Cirebon Jawa Barat
Abstrak: PT. Indocement Tbk Cirebon is one of the centre of cement production in Java. The mining activities will affect on the condition of habitats in this area. The purpose of this study is to assess herpetofauna composition and diversity. Data was collected on July 2013 in six sampling locations using VES (Visual Encounter Survey) – time search. There are 22 species with total 161 individuals herpetofauna consisting of 9 species of amphibians and 13 species of reptiles. The highest number of diversity index (Shannon Wiener index) found in Tegakan samping gudang batu bara, Kolam Goa Dalam and Hutan Alam Gunung Blindis, while the lowest number found in Curug Hanjuang. Three sampling points should be prioritize for conservation which are Tegakan samping gudang batu bara, Hulu Sungai Kali Jaya and Curug Hanjuang.
Keyword: habitat, diversity, herpetofauna

Judul: Keanekaragaman Jenis Burung di Areal PT Indocement Tunggal Prakarsa Tbk. Pabrik Palimanan
Abstrak: The bird species diversity in the location of PT Indocement Tunggal Prakarsa (ITP) Tbk, can be indicators of the successfully of the PT ITP in relative maintains of the environment. The research was conducted on 8 land cover types in the PT ITP. Bird data was collected using Point Count with the number of points at each location between four to six points, with the distance of each point with observation radius of 150 m and 50 m. Total bird species found at the sampling area is 46 species (25 families). Eight species of birds in the location in the list of protection according to the GR No. 7 in 1999 and two bird species included in Appendix II of CITES. Highest bird diversity index is the location of the Jatropha curcas (H'= 2.98). Evenness index in all types of land cover almost evenly spread of at the sampling area. T-test results showed that wetland, is a significantly different land cover types with trees land cover, plant area, Jatropha curcas, and shrubs. Artificial lake area significantly different with trees land cover, plant area, Jatropha curcas, and shrubs. Another significantly different is buffer areas with trees land cover. Locations with similarity index types (IS) is the highest among plant area with Jatropha curcas (IS= 0.77). The dominance bird species at sampling area was influence by land cover type.
Keyword: Palimanan, Indocement, diversity, bird

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