Judul: Pemanfaatan Limbah Pertanian dan Kontribusinya terhadap Pendapatan Keluarga di Sepanjang Sungai Cihideung sub Daerah Aliran Sungai Cisadane Bogor
Abstrak: Secara umum penelitian ini bertujuan untuk mempelajari pemanfaatan limbah pertanian dan kontribusinya terhadap pendapatan keluarga pada berbagai usaha tani di sepanjang sungai Cihideung Sub Daerah Aliran Sungai Cisadane Bogor. Secara khusus, tujuan penelitian ini adaIah: 1) mempelajari keadaan sosio-ekonomi, keragaan konsumsi pangan, sanitasi lingkungan dan status gizi keluarga; 2) mengidentifikasi jenis, pola pemanfaatan dan jumlah Iimbah pertanian berbagai usaha tani; 3) mengetahui kontribusipendapatan dari pemanfaatan limbah pertanian terhadap pendapatan keluarga; 4) menganalisis hubungan antara faktor-faktor yang mempengaruhi pemanfaatan limbah pertanian dengan kontribusi pemanfaatan limbah pertanian.
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Judul: Kontribusi pendapatan keluarga dari pemanfaatan limbah pertanian di desa sukajadi, kecamatan tamansari, kabupaten Bogor
Abstrak: Limbah pertanian yang dianggap sebagai sumberdaya yang kurang bernilai apabila dikelola secara bijaksana dapat dimanfaatkan sebagai sumberdaya yang bernilai ekonomis. Tujuan umum dari penelitian ini adalah mempelajari limbah pertanian dan pemanfaatannya. Tujuan khususnya adalah: (1) mempelajari jenis, manfaat, jumlah, dan pemanfaatan limbah pertanian, (2) mempelajari nilai tambah pemanfaatan limbah pertanian terhadap produksi dan pendapatan bersih usaha tani Penelitian ini merupakan studi lanjutan bagian dari penelitian payung bertema "Bioresources Management System to Support Household Food Securitya Longitudinal Study Among Rural Households in Java "Penelitian dilakukan di Desa Sukajadi, Kecamatan Tamansari. Desain penelitian yang digunakan adalah Cross Sectional Study. Penelitian dilaksanakan dari bulan Juli sampai Oktober 2001. Sebanyak 30 contoh yang mengusahakan lahan usaha tani dipilih secara purposive dari setiap strata kepemilikan lahan. Data primer yang dikumpulkan adalah identitas anggota rumah tangga; pendapatan keluarga; luas dan jenis lahan usaha tani; pihak pengambil keputusan terhadap pemanfaatan limbah pertanian; jenis, jumlah, manfaat dan nilai ekonomi limbah pertanian yang dihasilkan. Sedangkan data sekunder yang dikumpulkan adalah keadaan umum daerah penelitian. Data primer diperoleh melalui wawancara dengan menggunakan kuesioner. Data pemanfaatan limbah pertanian selain diperoleh melalui wawancara juga diperoleh melalui pengamatan langsung di lapangan. ...
Keyword: agricultural-waste utilization, agricultural waste, Duncan's test

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