Judul: Karakteristik usaha gaharu alam (Aquilaria malaccensis) di Provinsi Bengkulu: studi kasus Kabupaten Bengkulu Selatan, Kabupaten Kaur, dan Kabupaten Seluma
Abstrak: Forest is a natural resource that can be used for the people walfare. One of forest product which has potential to be used is resin agarwood. Gaharu has high sold price with production qualification that consist of gubal, kemedangan and ash. Each of product containsOleo Chromone which are produce unique aroma, so that it often used in many industries such as parfum industry, cosmetic industry and religion ritual need. High demand of agarwood cause the demand of it increase more, so that influence to the decrease more, but the agarwood exertion process still do so that it is important to do investigation of natural agarwood characteristics nowdays. This Research aims to know the characteristic of the natural agarwood exertion in Bengkulu Province, that consist of the characteristic of agarwoodenterprenuer (finder small, collector seller and big collector seller), the process of agarwood exertion, kinds and quality characteristic, marketing system and also policy in agarwood exertion. The methodology of this research is qualitative by describing the characteristic of natural agarwood exertion and quantitative by counting the margin of profit. There are three groups of gaharuenterprenuer namely: agarwood finder, small collector and big collector. The group of agarwood finders do the gaharu exertion. On the process of agarwood exertion need the specific skill about the characteristic of tree that contain agarwood. The products then sell to collector seller of agarwoodthrough its selling channel. The selling of agarwood begun by determining the condition and price, where there are seven agreed quality. This quality class is so determining the price, better quality of agarwood higher the price and lower quality of agarwood lower the price. The differences of price from each quality of agarwood can reach 3-15 times from the increasing each quality. Enterprenuer have role in determining namely big collector seller so that margin of highest price gotten by them is 1,4-2 multiple times with their income that they gottetn 28 times from income of agarwood finders group. In order to manage marketing of agarwood, government determines policy in the form of quota in a year, the license that is given to big collector seller in 5 year and the rate of dues determined based on gubal class Rp 20.000,-/kg and kemedanganRp 2.000,-/kg.
Keyword: 

Judul: Eksplorasi Peran Mikrob dan Status Hara Tanaman terhadap Pembentukan Gaharu pada Aquilaria malaccensis
Abstrak: Agarwood is known as one of non-timber forest commodity in the world. Agarwood has a lot of function such as raw material for perfume, incense, cosmetics, and medicine for some diseases. Indonesia has a good potential resource to produce agarwoods. At present, mechanism and processes of agarwood formation is not yet known exactly. There are three hypothesis in agarwood formation, that are 1) pathology hypothesis, 2) sliced dan pathology, and 3) non-pathology hypothesis. Meanwhile, ancient community used traditional system to stimulate agarwood formation by slicing, nailing, branch cutting, and peeling of stem rind. This research was done to know microbial effect and plant nutrition status in Aquilaria malaccensis and their correlation in agarwood formation. Chemical and biological analysis were used in this research. Chemical analysis was used to determine plant nutrition status. Meanwhile biological analysis was used to examine the microbes that caused agarwood formation. The result of this reseach showed that agarwood was formed either because of assosiation between microbes and Aquilaria malaccensis and slicing in that plant. The highest microbial population was found in branch protected by canopy. According to physiologic analysis, not all microbes in agarwood can dissolve cellulose and pectin. A high number of Agarwood was formed in plant with high N and Mn contents. Field trial showed that fungi were more potential than bacteria in agarwood formation
Keyword: 

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
Keyword: