Judul: Identifikasi keanekaragaman kapang pada imago dan kokon ulat sutera liar Attacus atlas (Lepidoptera: Saturniidae)
Abstrak: Attacus atlas adalah salah satu jenis ngengat di Indonesia yang dikenal dengan nama kupu-kupu gajah. Informasi mengenai keanekaragaman kapang yang terdapat dalam ngengat ini belum banyak diketahui. Tujuan dari penelitian ini adalah untuk memperoleh data keanekaragaman kapang patogen dan non patogen pada fase hidup imago dan kokon ulat sutera liar A. atlas. Kapang diisolasi dari kokon bagian dalam, sedangkan dari imago pada bagian integumen dan saluran reproduksi. Kapang hasil isolasi dikultur pada media potato dextrose agar. Identifikasi kapang hasil isolasi dari kokon dan imago dilakukan dengan pengamalan makroskopis dan mikroskopis. Hasil penelitian menunjukkan bahwa terdapat dua jenis kapang dari kokon A. atlas yaitu F. oxysporum dan A. flavus. Terdapat empat jenis kapang dari imago A. atlas yaitu A. flavus, A, versicolor, A. fumigatus F. dimerum, dan Aspergillus sp. Kapang yang berpotensi merugikan terhadap atlas yaitu F.dimerum, A. fumigatus, A. flavus, dan A. versicolor….
Keyword: Attacus atlas, Cocoon, Imago, Mould, Kupu kupu gajah, Pthogenic mould, Non pathogenicmould, Wild silkworm, Potato dextose agas

Judul: Eksplorasi Potensi Limbah Imago Ulat Sutera Liar Attacus atlas (Lepidoptera: Saturniidae)
Abstrak: Wild Silkworm Attacus atlas is an Indonesian native germplasm from Aceh to Papua. Cultivation of wild silkworm Attacus atlas has started in line with the high market demand on the caterpillar cocoon. The purpose of this study was to determine the potential of imago waste produced by cultivation of wild silkworm Attacus atlas as a source of alternative feed ingredients and the potency as antimicrobial. Proximate analysis was done to find out nutrition in imago of Attacus atlas, antimicrobial testing using the disk method. The results of the proximate analysis test imago silkworm Attacus atlas shows that the imago contains 75.57% protein, 5.94% fat, 3.80% ash, and 14.64% crude fiber from dry matter. Attacus atlas imago extract is brown, gel, fat as a potential source of animal fat. Antimicrobial test from 96% ethanol extract of imago Attacus atlas with the disk method showed no antibacterial activity against Escherichia coli, Pseudomonas, Streptococcus, and Staphylococcus.
Keyword: nutrition content, imago, antimicrobial, Attacus atlas, Bogor Agricultural University (IPB)

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.
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