Judul: Keragaman genetik dengan penanda RAPD, fenotipa pertumbuhan dan pendugan heritabilitas pada sengon
Abstrak: Paraserianthes falcataria (L) Nielsen, is one of the recomended tree species for industrial forest plantation and has long been cultivated by community in Java. Improvement program for this species requires basic genetic information such as genetic diversity, growth performance and heritability of some economically important characters. The objectives of this research is to estimate genetic diversity of several sengon populations in JAva using RAPD as marker, to establish progeny trials of sengon from those populations in order to observe their growth performance and estimate the heritability of tree height and diameter
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Judul: Genotyping of Sengon (Falcataria falcata) Accessions Resistant and Susceptible to Puru Rust using Single Nucleotide Polymorphisms Markers
Abstrak: Sengon (Falcataria falcata) merupakan jenis pohon cepat tumbuh (fast growing species) yang sering digunakan untuk kegiatan reboisasi dan rehabilitasi lahan pada penutupan lahan. Budidaya tanaman sengon memiliki faktor penghambat salah satunya seperti mudahnya terserang penyakit karat puru. Penelitian ini bertujuan untuk menganalisis variasi genetik aksesi sengon yang toleran dan intoleran terhadap serangan karat puru menggunakan penanda SNPs. Evaluasi serangan karat puru pada progeni testing famili sengon dilakukan dengan metode skoring. Sampel yang diuji berjumlah 40 aksesi dari masing-masing 5 aksesi resistan dan 5 aksesi rentan dengan 4 ulangan tiap aksesi. Sampel diuji menggunakan 6 primer SNPs dengan metode High-resolution Melting, data yang diperoleh kemudian digunakan untuk analisis chi-kuadrat dan Principal Component Analysist. Meski semua aksesi terserang penyakit karat tumor, keparahan serangan antara aksesi resistan dan rentan berbeda nyata. Hasil analisis SNPs menunjukkan bahwa semua primer yang digunakan menunjukkan asosiasi dengan sifat toleransi sengon terhadap karat puru.
Keyword: keragaman genetik, hrm

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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