Judul: Analisis bifurkasi fluxon pada persambungan Josephson bertipe superkonduktor-feromagnetik-superkonduktor (s/f/s)
Abstrak: Dinamika persambungan Josephson bertipe S/F/S berbeda dengan persambungan Josephson biasa, dimana pada dinamika persambungan tersebut terdapat penambahan suku sin 20 yang merupakan akibat dari kontribusi arus-super harmonik kedua yang terkait gejala Shapiro Steps. Penelitian yang telah dilakukan yakni menganalisis bifurkasi fluxon guna mengetahui kestabilan fluxon pada persambungan Josephson bertipe S/F/S. Analisis dilakukan menggunakan pendekatan dinamika sistem secara analitik dan dibantu dengan perhitungan numerik menggunakan aplikasi MATLAB ODE45. Hasil jenis titik kritis dan bifurkasi yang diperoleh menunjukkan parameter redaman ternormalisasi (ẞ dan je) tidak mempengaruhi perubahan kestabilan fluxon pada batas kurang dari satu. Parameter ẞ hanya mempengaruhi jenis titik kritis dan bifurkasi yang terjadi, jika beta = 0 untuk j_{e} = 0 maupun j_{e} = 0.4 bifurkasi yang terjadi adalah saddle-center, dan jika beta = 0.5 bifurkasinya adalah saddle-focus. Parameter je mempengaruhi amplitudo pada osilasi fluxon yang dihasilkan, jika j_{e} = 0 amplitudo fluxon sangat kecil, sedangkan jika j_{e} = 0.4 amplitudonya lebih besar. Pada setiap kasus tersebut, kestabilan fluxon dipengaruhi oleh arus-super harmonik pertama yang berbeda tanda, yaitu ketika j_{1} > 0 fluxon selalu stabil, sedangkan ketika j_{1} < 0 fluxon awalnya tidak stabil tetapi cenderung akan menuju titik stabilnya.
Keyword: Bogor Agricultural University, IPB, Superconductor, Josephson junction of S/F/S type, Fluxon, Dynamical system and Bifurcation, Institut Pertanian Bogor

Judul: Analisis Bifurkasi Fluxon pada Persambungan Josephson Bertipe Superkonduktor-Feromagnetik-Superkonduktor (S/F/S)
Abstrak: Dynamics for the Josephson junction of type S/F/S is different from ordinary Josephon junction, where on the junction is contained the addition of tribal sin 2φ which is the result of the second harmonic supercurrent on the Josephson junction of type S/F/S that is related to Shapiro Steps symptoms. Research has been done is analyze the fluxon bifurcation to determine the stability of the fluxon in a Josephson junction of type S/F/S. The analysis was done by using the approach of analytically dynamics system and assisted by numerical solution that uses the application ODE 45 on MATLAB. The result of the critical point and the bifurcation types which is obtained to show the normalized damping (β and ϳₑ) does not affect the change of fluxon stability at the limit of less than one. Parameter β only affects the type of critical point and bifurcation that occurs, if β = 0, for ϳₑ = 0 and ϳₑ = 0.4 the bifurcation occurs is a saddle-center, and if β = 0.5 the bifurcation is a saddle-focus. Parameter ϳₑ affects the amplitude on the generated fluxon oscillation, if ϳₑ = 0 the fluxon amplitude is very small, whereas if ϳₑ = 0.4 the amplitude is larger. In each case, the fluxon stability is affected by the first harmonic supercurrents which is different sign, those are when ϳ₁ < 0 the fluxon is always stable, whereas when ϳ₁ < 0 fluxon is unstable at first but it tends towards to the point of its stability.
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Judul: Manajemen Pemeliharaan Kuda (Equus caballus) Untuk Upacara Kenegaraan Dan Sarana Kesenjataan Di Detasemen Kavaleri Berkuda (DenKavkud) TNI-AD Parongpong
Abstrak: Cavalry Horse Detachement (Denkavkud) Indonesian National Army-Cavalary Parongpong is one of the Indonesian military units that utilize the horse and train it as a means of purpose of formal state ceremony and armed forces. Skills possessed by the horse cavalry was the result of care management and specialized training provided by the trainer. Aspects of care management are breeding, feeding, and management. Horses that are kept in the Denkavkud, Parongpong are stallions, mares, foals, and military horses. Total populations of horses at Denkavkud are 183 horses. Besides commited horse training (remonte), Denkavkud also did breeding program to produce horses that can be trained and used as a military horse. There are some issues contained in Denkavkud, such as some of the nutrients needed by the horses not being met from feed given. One of these is crude protein and lysine. Lactation mares was crude protein and lysine deficiency. The number of death in 2010 is higher than previous years. Based on the number of horses that died from January until June 2010 is 11 horses. The average mortality was caused by colic. Colic is caused by excessive eating, excessive drinking during hot, moldy food, and even by investment roundworms. Animal welfare in Denkavkud can be enhanced by improvement of feed given and improving the health of livestock through improved sanitation.
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