Judul: Body Size of The Eighth Generation of Cross-Bred  local Chickens (PSKM) Start 2nd Weeks to 12th Weeks of Age
Abstrak: Ayam pelung-sentul-kampung-meat type chicken (PSKM) adalah hasil dari persilangan antara F1 ayam pelung-sentul (PS) jantan dengan ayam meat typekampung (KM) betina untuk menghasilkan ayam lokal tumbuh cepat dan memiliki ukuran tubuh yang besar. Penelitian ini bertujuan menganalisa ukuran tubuh ayam PSKM generasi kedelapan (PSKM G8) dan membandingkan dengan generasi sebelumnya. Penelitian menggunakan 30 ayam jantan dan 30 ayam betina. Peubah yang diukur tiap 2 minggu adalah panjang shank, lingkar shank, panjang tibia, panjang femur, panjang punggung, lingkar dada, lebar dada, dalam dada, dan panjang dada. Analisis data hasil penelitian menggunakan analisis deksriptif. Hasil penelitian menunjukkan ayam PSKM G8 memiliki koefisien keragaman berkisar 0,72% sampai 8,84% pada setiap peubah yang diamati. Ayam PSKM G8 memiliki ukuran tubuh yang cukup seragam dibandingkan dengan generasi sebelumnya., Pelung-sentul-kampung-meat type chicken (PSKM) is a result of crossbreeding between F1 male pelung-sentul chickens (PS) with female meat typenative chickens (KM) to produce chickens that have fast growth and large body size. The aim of this study was to examine the body size of the eighth generation PSKM chickens (PSKM G8) and compare with the previous generation. The number of chickens used was 30 male chickens and 30 female chickens. The variables measured every 2 weeks were shank length, shank circumference, tibia length, femur length, back length, chest circumference, chest width, chest depth, and chest length. The research data were analyzed descriptively. PSKM chicken G8 had a coefficient of variant 0,72% to 8,84% on each variable observed. PSKM chicken G8 had a fairly uniform body size compared to the previous generation.
Keyword: body size, descriptive, kampung chickens, productivity, PSKM G8, body size, descriptive, kampung chickens, productivity, PSKM G8

Judul: Ukuran Tubuh Ayam Hasil Persilangan Pelung X Sentul Dengan Kampung X Ras Pedaging Pada Umur 12 Sampai 22 Minggu
Abstrak: Penelitian ini bertujuan untuk mengobservasi ukuran tubuh ayam F1 pada fase pertumbuhan (12-22 minggu) dari hasil persilangan ayam pelung sem sentul (PS), ayam kampung ras pedaging (KB) dan ayam ras pedaging kampung (BK) Penelitian ini dilakukan pada bulan Desember 2014 sampai Mei 2015. Total ayam yang digunakan dalam penelitian ini ada 42 ekor yaitu jantan PSKB (12) Betina PKR (9), jantun PSBK (10) dan betina PSBK (8). Peubah yang diamats pada penelitian ini antara lain bobot badan, lingkar dada, panjang zihia, panjang fenner, ilin panjang dada. Uji T digunakan untuk membandingkan bobot hadan dan ukuran tubuh dari dua ayam persilangan. Hasil penelitian ini menunjukkan hohot badin antara jantan dan betina pada umur yang sama dan begitu juga pada ulouran tubuh (lingkar dada, panjang shiu, panjang femar, dan panjang dada) adalah sama antara ayam PSKB dan PSBK…
Keyword: Body size, Cross breeding, PSBK chicken, PSKB chicken, Animal science, Chickens, Domestic fowl, Ayam PSKB, Ayam PSBK

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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