Judul: Analisis Pendapatan dan Kelayakan Usaha Akar Wangi di Kecamatan Samarang Kabupaten Garut
Abstrak: Vetiver is one of plantation sub-sector with a huge potensial to be developed which have share of the world market at a price level is quite high. The subdistrict Samarang is one of vetiver production centers located in Garut district of West Java Province. Vetiver farming in the District of Samarang has the potencial to earn huge profits, because the area has the land and the weather is suitable for the cultivation of vetiver. But in 2013, the vetiver farming in Garut decline in production which resulted in the revenue of vetiver business decreases. The purposes of the research are to analyze the performance of vetiver and to analyze income and feasibility of businesses vetiver The result of the study showed that the farmers and refiners have not implemented appreciate cultivation and distillation techniques Good Agriculture Proccessing (GAP) and Good Maifacturing Practices (GMP). Business actors vetiver consists of farmer, distiller, farmerdistiller, farmer-distiller-gatherer and farmer-distiller-gatherer-exporter. The result of the study showed that the highest income bussines acquired by farmerdistiller- gatherer-exporter and the lowest income earned by farmers alone business. Business of vetiver is feasible. Based on the result of the sensitivity analysis, a decrease of vetiver prices, a decrease of vetiver oil prices, an increase fuel prices and an increase of export costs can decrease revenue and unfeasible business of vetiver. Use of quality seeds, an increase production and an increase capacity of raw materials can increase revenue businesses vetiver.
Keyword: Bogor Agricultural University (IPB), vetiver, revenue analysis, feasibility analysis

Judul: Perbaikan Teknik Produksi dan Analisis Kelayakan Finansial Usaha Produksi Minyak Akar Wangi (Vetiveria zizanoides) di Kampung Legok Pulus Kabupaten Garut
Abstrak: Vetiveria zizanoides commonly known as vetiver is a kind of essential oil that has large marketing opportunities. Haji Ede home industry is one of the vetiver root oil producers that located in Kampung Legok Pulus, Garut. The purpose of this research is to formulate the improvement of production method and to analyze the financial feasibility of vetiver root oil production. The suggested improvement were formulated on the process of harvesting, drying, and distillation. With 10-year investment value of Rp 200,000,000, investment of complement tools each year amounting to Rp 429,000, fixed costs of Rp 27,188,000/year, the variable cost of Rp 1,996,457,500/year, the unit cost of producing oil vetiver is Rp 766,600/kg. The BEP 2,530 kg/year. As the selling price is Rp. 800,000/kg, the profit obtained by UKM vetiver oil refinery is Rp. 88,176,000/year. The NPV of Rp 213,508,492, Net B/C of 3.27, Gross B/C 1.02, IRR 36.17%, and payback period for the past 2 years and 6 months indicate that the business is financially feasible.
Keyword: Garut-Jawa Barat, Agricultural machines

Judul: Algorithm Construction of HLI Hash Function
Abstrak: Cryptography is a study of mathematical techniques related to aspects of information security regarding on confidentiality, data integrity, entity authentication, and data origin authentication. Data integrity is a service, which is associated with the conversion of data carried out by unauthorized parties. To maintain data integrity, one can use hash functions. An hash function is a computationally efficient function to map an arbitrary length bitstring to a fixed length bitstring called as hash value. The use of hash function in maintaining the information integrity and authentication is in digital signatures, virus protection, and software distribution. Illustration of the hash function in the integrity and authentication of information that is emailed as follow. The sender sends the information and hash value to the recipient. If the hash value of the information is equal to the hash value that is sent by the sender, then information has not been changed. Otherwise the information has been changed. An hash function has two properties, one way and collision resistance. An hash function is called one way if it is computationally infeasible to find any input such that when given any hash value . Meanwhile an hash function is called collision resistant if it is computationally infeasible to find any two inputs where such that . The purpose of this study is to construct a HLI hash function algorithm, to analyze the speed and security of the hash functions as a results of construction. Furthermore, it is to compare it with SWIFFT. Hash function is constructed based on the result of algebraic operations on modular polynomial ringwith . Modular polynomial ring noted as is a set of all polynomials of degree at most with coefficients in . can be represented as a set of integer vector of modulo in dimension . So, it is simple to implement in a computer. In vector operations, is lattice . Furthermore, alattice that is defined from certain polynomial ring is called ideal lattice. HLI hash function is consists of addition and multiplication algorithm in the ring. Addition algorithm consists of sumation operations of modulo and multiplication consists of multiplication operations of modulo . Generally, algorithm of HLI hash function consists of multiplication operations of modulo and addition operations of modulo . However, if the input is binary number then multiplication algorithm only consists of multiplication operation of modulo , so algorithm of HLI hash function consists of multiplication operations of modulo and addtion operations of modulo . An hash function is secured if it has two properties, i.e., one way and collision resistance. HLI hash function hash is one way, it is following the proof of Micciancio. It is has collision resistant because of polynomial is irreducible over and monic. Moreover, it is proved that for every unit vector , the vector is small vector. If the input of hash function is a binary number then HLI hash function only involves addition operations of modulo . So the time that used almost same with SWIFFT. The excellence of HLI hash function is the key size smaller than SWIFFT. This effect on
Keyword: hash function, modular polynomial ring, lattice