Judul: Keragaman kucing (Felis domesticus) di Kecamatan Bogor Tengah  berdasarkan karakter morfologi
Abstrak: Karakter morfologi memberikan ciri khusus pada setiap kucing dan dapat menggambarkan karakter dari suatu populasi. Penelitian ini mempelajari mengenai 11 lokus yang mengekspresikan karakter morfologi, yaitu lokus w~W, o~O, A~a, B~b, C~cs~ca~c, Ta~T~tb, i~I, D~d, s~S, L~l, dan m~M. Karakter tersebut diamati melalui video dan frekuensi alel dianalisis menggunakan metode square-root. Keragaman kucing di Kecamatan Bogor Tengah dilihat dari nilai heterozigositas (h) dan heterozigositas rataan (Ĥ). Dari 11 kelurahan administratif di Kecamatan Bogor Tengah diperoleh 514 individu kucing. Pola warna Siam yang jarang ditemukan di Indonesia, terdapat pada Kelurahan Tegalega dan Gudang. Ekor pendek di Kecamatan Bogor Tengah memiliki nilai frekuensi yang tinggi seperti halnya pada kucing-kucing di Asia. Nilai heterozigositas (h) pada lokus w~W sebesar 0.7%, lokus o~O sebesar 43.2%, lokus A~a sebesar 49.9%, lokus B~b sebesar 31.7%, lokus C~cs~ca~c sebesar 9.7%, lokus Ta~T~tb sebesar 39.4%, lokus i~I sebesar 1.8%, lokus D~d sebesar 27.7%, lokus s~S sebesar 49.2%, lokus L~l sebesar 11.2%, dan lokus m~M sebesar 45.3%. Nilai heterozigositas rataan (Ĥ) di Kecamatan Bogor Tengah relatif tinggi, yaitu sebesar 28.2%. Hal ini disebabkan adanya karakter-karakter tipe mutan dari setiap kelurahan.
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Judul: Morfogenetik Kucing (Felis domesticus) di Tiga Kecamatan di Kabupaten Wonogiri
Abstrak: Felis domesticus was originated from domestication of Felis silvestris (European wild cat). Usually, cats were utilized as pets and mice controller by humans. This study aimed to estimate cat diversity in three districts in Wonogiri based on morphological characters expressed by 11 loci: A~a, B~b~bl, C~cb~cs~ca~c, D~d, i~I, L~l, m~M, o~O, s~S, Ta~T~tb, and w~W. Estimation of allele frequencies were performed using square root and maximum likelihood methods. Heterozygosity (h) and average heterozygosity (Ĥ) were applied to determine alleles diversity. FST was used to estimate genetic diversity among three districts; Wonogiri, Ngadirojo, and Selogiri. Among 11 observed loci, new alleles that found were b, cs, d, I, l, tb, W. Mostly wild type allele revealed higher frequency than mutan type allele, except m~M locus. Heterozygosity (h) on each loci were A~a= 0.491, B~b= 0.294, C~cs= 0.167, D~d= 0.227, i~I= 0.021, L~l= 0.238, m~M= 0.501, o~O= 0.470, s~S= 0.499, Ta~T~tb= 0.311, and w~W= 0.002. The highest allele diversity (h) was revealed in m~M locus. Average heterozygosity (Ĥ) over 11 loci and 9 loci were 0.261 and 0.268, respectively. The difference of average heterozygosity (Ĥ) was due to allele distribution and influenced by geography. FST of A~a, B~b, C~cs, i~I, L~l, Ta~T~tb, and m~M loci were smaller than 0.05 meaning that low genetic diversity detected upon loci. The negative FST in D~d, o~O, s~S, and w~W loci indicated that there were no difference on genetic diversity.
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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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