Judul: Studi patologi Q fever pada hewan kurban sapi di wilayah Jakarta Timur dan Jakarta Selatan
Abstrak: Query fever (Q fever) is one of the dangerous zoonoses. This research was to determined the existence of Coxiella burnetti, the agent of Q fever, in sacrificial cattle for Eid Adha in East and South Jakarta in 2011 and 2012. Ten samples of liver and seven samples of lung taken during Eid Adha in 2011 and 2012. The existence of Coxiella burnetii was determined by using immunohistochemistry stain. Histopahology of liver sample and lung sample was determined using Hematoxylin Eosin stain. This studi showed that one liver sample from South Jakarta in 2012 were positive Q fever and other samples were negative Q fever based on immunohistochemistry stain. All organ showed inflammatory cells, congestion and fibrosis.
Keyword: cattle, Eid Adha, immunohistochemistry, Q fever,, zoonoses

Judul: Studi Kasus Q Fever Pada Sapi “Idul Adha” Di Wilayah Jakarta Pusat Dengan Metode Imunohistokimia
Abstrak: Q fever merupakan zoonosis yang disebabkan oleh Coxiella burnetii, bakteri gram negatif, bersifat intraseluler obligat. Hewan ternak dan hewan kesayangan merupakan reservoir utama infeksi, dan transmisi ke manusia terutama terjadi melalui inhalasi aerosol. Q fever merupakan penyakit yang ada di seluruh dunia kecuali Selandia Baru. Q fever memiliki gejala subklinis yang bervariasi dan tidak patognomonis, sehingga untuk mendiagnosanya perlu dilakukan uji dengan akurasi tinggi. Penelitian tentang Q fever pada sapi “idul adha” di wilayah Jakarta Pusat dengan metode imunohistokimia dilakukan dari oktober 2014 sampai september 2015 di Divisi Patologi FKH IPB. Hasil penelitian menunjukkan 3 sampel imunoreaktif dan 15 sapi non imunoreaktif terhadap antibodi anti Coxiella burnetii. Hasil pewarnaan HE sampel positif menunjukkan terdapat lesio pada organ limpa, hati dan paru-paru. Lesio pada limpa berupa deplesi folikel limfoid, peradangan, dan edema. Lesio pada hati berupa degenerasi hidropis. Lesio pada paru-paru berupa kongesti, dan hemoragi. Hasil penelitian ini merupakan laporan kejadian Q fever pada sapi kurban yang pertama kali dilaporkan di Wilayah Jakarta Pusat.
Keyword: Coxiella burnetii, idul adha, Q fever, zoonosis

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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