Judul: Analisis Lingkungan Mikro Dengan Teknik Computational Fluid Dynamics (CFD) pada Kandang Domba Garut Sistem Tertutup di Kandang Penggemukan Fakultas Peternakan IPB
Abstrak: Cage has a very important role in accommodating all livestock activities .1\Ifh as providing comfort and protection from environmental 'hi1-l.uences. Livestock will be able to develop and grow normally in good cage environment condition. Livestock development is influenced by the climate of the ~ge microenvironment such as air temperature, humidity, wind speed, and light j tensity. ~ This research aimed to analyze the distribution of temperature, humidity, "S!ind speed and air flow patterns inside the cage with the fan turning on and off ~ith a technique of Computational Fluid Dynamics (CFD). The parameteres ~hich were observed included temperature, relative humadity (RH), air flow and iradiation with the uniform environmental conditions from 07.00 a.m. until 15:00 l-m. Then, the data obtained were analyzed and compared with simulation results esing SolidWork 2009. "tI The highest temperature inside the cage based on measurement was 33.33 ~ at 12.00 p.m., with the simulation results using SolidWork 2009 up to 34.45 t . Error of temperature based on measurement results with simulation results at gg .OO, 12.00 and 15.00 were 5.24%, 2.83%, and 2.01%. pThe highest relative itmidity based on measurements was 89.67% in the morning and evening, during &., e simulation up to 85.17% at 08.00 p.m. RH errors from the measurement results with simulations were 2.97%, 5.07%, and 3.93%. The highest wind speed from CFD simulation results was 1.90 m/sec at 15.00 p.m. The simulation results showed that the temperature level and RH when the fan was on and off were almost the same, with the difference about ± 0.01 DC, and the air movement had a difference of about 0.02-0.11 m/sec.
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Judul: Analisis lingkungan mikro dengan teknik computational fluid dynamics (CFD) pada kandang domba garut sistem tertutup di kandang penggemukan fakultas peternakan IPB
Abstrak: Cage has a very important role in accommodating all livestock activities as providing comfort and protection from environmental influences. Livestock will be able to develop and grow normally in good cage environment condition. Livestock development is influenced by the climate of the cage microenvironment such as air temperature, humidity, wind speed, and light intensity. This research aimed to analyze the distribution of temperature, humidity, wind speed and air flow patterns inside the cage with the fan turning on and off with a technique of Computational Fluid Dynamics (CFD). The parameteres which were observed included temperature, relative humadity (RH), air flow and irradiation with the uniform environmental conditions from 07.00 a.m. until 15:00 p.m. Then, the data obtained were analyzed and compared with simulation results using SolidWork 2009. The highest temperature inside the cage based on measurement was 33.33 °C at 12.00 p.m., with the simulation results using SolidWork 2009 up to 34.45 °C. Error of temperature based on measurement results with simulation results at 08.00, 12.00 and 15.00 were 5.24%, 2.83%, and 2.01%. pThe highest relative humidity based on measurements was 89.67% in the morning and evening, during the simulation up to 85.17% at 08.00 p.m. RH errors from the measurement results with simulations were 2.97%, 5.07%, and 3.93%. The highest wind speed from CFD simulation results was 1.90 m/sec at 15.00 p.m. The simulation results showed that the temperature level and RH when the fan was on and off were almost the same, with the difference about ± 0.01 °C, and the air movement had a difference of about 0.02-0.11 m/sec.
Keyword: CFD, Fattening cage, Garut sheep, Micro climate, Bogor Agricultural University

Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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