Judul: Prevalence of Helminthiasis in Deer around IPB Dramaga
Abstrak: Penyakit kecacingan merupakan suatu masalah kesehatan bagi rusa. Infeksi cacing pada rusa dapat menimbulkan berbagai kerugian seperti pertumbuhan terhambat, gangguan reproduksi dan kematian. Data terkait prevalensi kejadian penyakit kecacingan menjadi penting untuk manajemen kesehatan dan pengendalian penyakit pada rusa sehingga dapat meningkatkan produktivitas rusa. Penelitian ini bertujuan mengidentifikasi jenis cacing, serta mengukur prevalensi kejadian kecacingan pada rusa di sekitar kampus IPB Dramaga. Penelitian ini menggunakan total 31 sampel feses rusa. Uji yang dilakukan pada penelitian ini antara lain uji flotasi, McMaster, filtrasi bertingkat dan identifikasi jenis cacing. Hasil penelitian ini menunjukkan bahwa prevalensi kejadian kecacingan pada rusa di sekitar kampus IPB Dramaga sebesar 32.26% dan jenis cacing yang menginfeksinya berasal dari kelas nematoda yakni Trichuris sp. dan Trichostrongylus sp. Sebanyak 6 sampel menunjukkan hasil positif uji McMaster dengan masing-masing jumlah telur yang ditemukan berada dalam rentang 1–499 telur tiap gram tinja (TTGT) sehingga derajat keparahan infeksi tergolong ringan. Program deworming dan manajemen pemeliharaan yang baik perlu diterapkan untuk menghindari peningkatan kejadian kecacingan pada rusa., Helminthiasis is a health concern for deer. Worm infections in deer can cause various losses such as stunted growth, reproductive disorders and death. Data related to the prevalence of helminthiasis is important for health management and disease control in deer so as to increase deer productivity. This study aimed to identify the types of worms, and measure the prevalence of helminthiasis in deer around IPB Dramaga. This study used a total of 31 deer feces samples. Tests conducted in this study include flotation test, McMaster test, multilevel filtration test and identification of worm species. The results of this study showed that the prevalence of helminthiasis in deer around IPB Dramaga was 32.26% and the types of worms that infected them came from the nematode class, namely Trichuris sp. and Trichostrongylus sp. A total of 6 samples showed positive results of the McMaster test with each number of eggs found in the range of 1–499 eggs per gram of feces (EPG) so that the severity of infection was classified as mild. Deworming programs and good husbandry management need to be implemented to avoid an increase in the incidence of helminthiasis in deer.
Keyword: deer, helminthiasis, nematode, prevalence

Judul: Prevalence of Helminthiasis in Sport Horses at One Stable in Cibinong District, Bogor Regency, West Java.
Abstrak: Kecacingan pada kuda merupakan satu di antara beberapa faktor yang dapat memengaruhi produktivitas serta performa kuda. Penelitian mengenai kecacingan pada kuda atlet di Bogor belum banyak dilakukan. Penelitian ini bertujuan mengidentifikasi jenis-jenis cacing parasit serta mengukur prevalensi dan derajat kecacingan pada kuda atlet di satu stable di Kecamatan Cibinong, Kabupaten Bogor, Jawa Barat. Sebanyak 41 sampel feses dikumpulkan dan diperiksa menggunakan metode flotasi sederhana, filtrasi bertingkat, dan McMaster. Hasil penelitian menunjukkan bahwa sebanyak 41 (100%) kuda atlet yang diteliti terinfeksi hanya oleh jenis cacing nematoda strongylida dengan derajat infeksi rendah sampai tinggi. Tidak ada kuda yang terinfeksi oleh cacing dari kelompok trematoda maupun cestoda. Sebagian besar kuda terinfeksi dengan derajat infeksi sedang yaitu sebesar 48,78%. Nilai rataan total telur per tinja dari setiap kategori umur dan jenis kelamin berada di rentang derajat infeksi sedang (200-500) dengan persentase paling tinggi ada pada derajat infeksi sedang (umur = 15 tahun 41,18%; umur, Helminthiasis in horse is one of several factors that can affect horse productivity and performance. The research on helminthiasis in sport horses in Bogor was very limited. This study aimed to identify the types of parasitic helminth and measure the prevalence and degree of helminthiasis in horses at a stable in Cibinong district, Bogor Regency, West Java. A total of 41 fecal samples were collected and examined using sample flotation, multistage filtration, and McMaster methods. The results showed that 41 (100%) horses were infected by only strongyle nematode species with low to high infection rates. No horses were infected with worms from the trematode or cestode groups. Most horses were infected with a moderate degree of infection at 48.78%. The mean value of total eggs per feces from each age and sex category was in the moderate infection degree range (200- 500) with the highest percentage in the moderate infection degree (age = 15 years 41.18%; age
Keyword: helminthiasis, prevalensi, horse, nematode

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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