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.
Keyword: 

Judul: Morfogenetik Kucing Domestik (Felis domesticus) di Depok.
Abstrak: Morfologi sebagai metode untuk menghitung variasi frekuensi karakter dalam suatu populasi disebut morfogenetik. Beberapa ciri umum morfologi pada kucing seperti warna rambut, pola warna, pigmentasi, panjang rambut dan panjang ekor, dinyatakan pada 11 lokus (A ~ a, B ~ b ~ b ', C ~ cb ~ cs ~ ca ~ c, D ~ d, i ~ I, L ~ l, o ~ O, s ~ S, Ta ~ T ~ tb, w ~ W, dan m ~ M). Depok adalah kota yang sedang berkembang dan mengalami migrasi manusia yang cukup tinggi. Migrasi manusia yang tinggi ini mempengaruhi persebaran kucing domestik di daerah tersebut, karena kucing domestik umum dijadikan hewan peliharaan oleh manusia. Data tentang persebaran kucing domestik di Depok belum pernah dilaporkan. Oleh karena itu, tujuan dari penelitian ini adalah untuk mengidentifikasi keragaman alel kucing domestik (Felis domesticus) di Depok berdasarkan karakter morfologi. Informasi mengenai keragaman morfogenetik ini dapat berguna bagi para breeder untuk mengetahui keragaman kucing domestik di kota Depok. Sebanyak 749 foto kucing domestik diperoleh dari sepuluh kecamatan di Depok. Foto kucing dikumpulkan menggunakan metode road sampling dan dinotasikan dalam alel. Analisis dilakukan untuk menentukan heterozigositas (h) dan heterozigositas rata-rata (Ĥ). Faktor ini digunakan untuk menganalisis keragaman morfogenetik kucing domestik. Nilai heterozigositas pada lokus B ~ b ~ b ' lebih tinggi dari lokus lainnya. Nilai heterozigositas pada lokus B ~ b ~ b ' bernilai 64.50%. Nilai terendah heterozigositas ditemukan pada lokus m ~ M yang bernilai 16.72%. Total nilai rata-rata heterozigositas di sepuluh kecamatan di Depok adalah 38%. Tingginya tingkat keragaman kucing domestik di Depok dapat digunakan oleh breeder sebagai informasi untuk mendapatkan jenis kucing yang diinginkan
Keyword: Allele heterozygosity, Felis domesticus, Morphogenetic

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: