Judul: Studi infestasi ektoparasit pada anjing di Pondok Pengayom Satwa Jakarta^cGrady Priasdhika
Abstrak: Dog is the most common pet animal reared by humans. The problem that often found is the presence of ectoparasites such as ticks, fleas, mites, and louse. This study aim to determine the prevalence ectoparasite infestations in dogs at Pondok Pengayom Satwa Jakarta (PPSJ) from 2009 to 2013. The medical record data grouped based on sex, breed, and age. The result showed that there were 538 from 3 478 dogs that come at PPSJ infested by ectoparasites (15.47%). Types of ectoparasites recorded from 2012 to 2013 were ticks (41.96%), louse (23.94%), fleas (21.48%), and mites (12.63%). The infestation of ectoparasites found more in the male dog (16.55%) than the female dog (14.15%). In addition, pure breed dog (17.87%) had the highest prevalence of ectoparasites followed by mixed (13.27%), and local breed (12.43%). The dog which above 1 year old (17.21%) was more infested than the dog which 1 year old or less (13.59%). The result of Chi-square test (p<0.01) showed there were significant different between sex, breed, and age with the ectoparasites infestations in dogs.
Keyword: Bogor Agricultural University (IPB), sex, prevalence, infestation, ectoparasite, dogs, breed, age

Judul: Sebaran Infestasi Ektoparasit pada Anjing di Bandung.
Abstrak: Dogs is the most desirable pets than cats, dogs also companions and playmates, other than that utilized for hunting and a reliable house keeper. Ectoparasite infestations in dogs can damage the health of the dog and its owner. The study aims to learn distribution of ectoparasite infestations in dogs in Bandung. Observations were made based on the medical records from 2008 to 2014, from 7 veterinary clinic located in the city of Bandung. The result showed that prevalence of ectoparasites infestations ( 0.91%) of 70800 dogs come to clinic. Diverse types of ectoparasites commonly attack dogs i.e. tick, Rhipicephalus sanguineus (19.9); lice, Trichodectes canis (74.6%); and flea, Ctenocephalides felis (5.5%). Ectoparasites infestation found more on male dogs (60.24%) than female dogs (39.4%). The pure breed dog had the highest distribution (65.46%), followed by the mixed dog (23.09%), and the local dog (11.45%). However, based on age, the dogs over the age of 1 year less infested (20.48%) than the dogs under 1 year old (41.6%), and the rest of (39.7%) was unidentified. The result of Chi-square test (p>0.01) showed no significant different between sex, breed, and age with the ectoparasites infestations in dogs in Bandung with P-value male 0.319 and female 0.982.
Keyword: dog, ectoparasite, infestation, pure breed, mixed breed

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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