Judul: Penerapan good breeding practices sapi potong di PT lembu jantan perkasa Serang-Banten
Abstrak: Cow-calf production is fundamental to the other cattle production system, i.e growing of stocker and cattle finishing. Good Breeding Practices (GBP) for beef cattle is important for breeding goal achievement that is producing breeding animal. The scope of GBP in beef cattle farming includes four aspects: facilities, cattle breeding, environmental protection and supervision. The study aimed to examine the Good Breeding Practices for beef cattle at PT Lembu Jantan Perkasa (LJP) in Serang -Banten. Descriptive analysis was used to review the breeding operation in PT LJP Serang-Banten. The breeding parameters observed were calving interval, service per conception, conception rate, and calving rate. The result showed that in general the company had applied well GBP in its operation. There were several aspects that should be considered to improve the GBP operation those site plant building and security, replacement stock, and animal health. Calving interval are 408 days in 2009 and 372 days in 2010. Service per conception are 1,6 in 2009 and 1,5 in 2010. Conception rate are 78% in 2009 and 88% in 2010 and calving rate are 23% in 2009 and 84% in 2010.
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Judul: Penampilan Produksi Induk Sapi Brahman Cross (BX) yang Diinseminasi Buatan Menggunakan Semen Berbeda di PT Lembu Jantan Perkasa Serang-Banten.
Abstrak: Inseminasi buatan (IB) merupakan salah satu teknik perkawinan yang dapat digunakan untuk memperbaiki mutu genetik ternak sapi potong melalui pejantan unggul dan pencegahan penularan penyakit kelamin yang dapat terjadi melalui kawin alam. Keberhasilan pelaksanaan IB ditentukan oleh tercapainya efisiensi reproduksi, peningkatan populasi sapi potong dan diterimanya IB oleh peternak. Efisiensi reproduksi dalam pelaksanaan IB dipengaruhi oleh peubah-peubah diantaranya jarak beranak (calving interval), jumlah pelayanan per kebuntingan (service per conception), angka kebuntingan (conception rate) dan angka kelahiran (calving rate). PT Lembu Jantan Perkasa (LJP) Serang-Banten merupakan salah satu perusahaan swasta yang bergerak dalam bidang penggemukan, pembibitan, dan pemasaran sapi potong. Penelitian ini bertujuan untuk mengetahui penampilan produksi dan reproduksi induk sapi Brahman Cross (BX) yang diinseminasi buatan dengan menggunakan semen sapi pejantan Brahman dan Simmental di PT LJP. Penelitian ini dilakukan pada bulan Juli sampai dengan bulan Agustus 2010. Peubah yang diamati dalam penelitian ini adalah calving interval (CI), service per conception (S/C), conception rate (CR), calving rate (C/R), bobot lahir, dan bobot sapih. Data calving interval (CI), service per conception (S/C), conception rate (CR), dan calving rate (C/R) yang diperoleh dianalisis menggunakan analisis deskriptif untuk menggambarkan kondisi PT LJP Serang-Banten. Data bobot lahir dan bobot sapih dianalisa dengan analysis of variance (ANOVA).
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Judul: Penyelesaian Masalah Rotasi Aliran Fluida Kental Von Karman Menggunakan Metode Homotopi
Abstrak: Von Karman equation is an equation that describes fluid viscous flow induced by infinite disk rotation. By assuming steady flow and laminar, viscous incompressible fluid flow is represented in Von Karman equation by an angular velocity and the vertical direction velocity as the independent variables. Von Karman equation is a nonlinear problem that is solved using the homotopy method. The use of homotopy method is done by defining an homotopy function that requires auxiliary parameters to control the convergent region of the solution. The solution is a recursive formula with given initial conditions. Using software based-functional shows that velocity components converge to a value.
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