Judul: Welfare Management of Asian Giant Tortoise (Manouria emys) and Its Utilization as Display Animals at TMII
Abstrak: Pembebasan lahan di kawasan hutan Kalimantan yang berlebihan mengakibatkan dampak buruk bagi keberlangsungan hidup kura-kura kaki gajah. Salah satu upaya untuk pelestarian kura-kura kaki gajah dilakukan melalui upaya pelestariannnya di luar habitat alaminya (eksitu) seperti yang dilakukan di Taman Reptil Taman Mini Indonesia Indah (TMII). Penelitian ini bertujuan untuk mengidentifikasi pengelolaan dan menilai kesejahteraan kura-kura kaki gajah di Taman Reptil TMII, menganalisis persepsi pengunjung terkait pemanfaatan kura kura kaki gajah sebagai satwa peraga, dan merumuskan rekomendasi pengembangan pemanfaatan kura-kura kaki gajah sebagai satwa peraga. Metode yang digunakan yaitu observasi lapang, wawancara, dan studi literatur. Hasil penelitian menunjukan pengelolaan kura-kura kaki gajah di Taman Reptil TMII termasuk baik dan nilai kesejahteraan satwa termasuk dalam kategori sangat baik dengan nilai rata-rata 80.68. Persepsi pengunjung mengenai pemanfaatan kura-kura kaki gajah sebagai satwa peraga adalah setuju. Rekomendasi pengembangan pemanfaatan kura-kura kaki gajah sebagai satwa peraga yaitu atraksi antara pengunjung dengan satwa melalui kegiatan foto bersama dan memberi pakan dengan didampingi keeper., Excessive land acquisition in Kalimantan Forest areas harms the survival of the asian giant tortoise. One of the efforts to preserve the asian giant tortoise is through conservation efforts outside its natural habitat (ex-situ) finished at the Taman Mini Indonesia Indah (TMII) Reptile Park. This study aims to identify the management and assess the welfare of the asian giant tortoise in the TMII Reptile Park, analyze visitor perceptions regarding the use of the asian giant tortoise as a display animal, and formulate recommendations for the development of the use of the asian giant tortoise as a display animal. The methods used are field observations, interviews, and literature studies. The results showed that the management of the asian giant tortoise in the TMII Reptile Park was good cum the value of animal welfare was in the marvelous category with an average value of 80.68. The visitor's perception regarding the use of the asian giant tortoise as a display animal agrees. Recommendations for the development utilization of asian giant tortoise as display animals are attractions between visitors and animals through group photos and feeding activities accompanied by a keeper.
Keyword: Tingkat kesejahteraan, Pengelolaan Kesejahteraan, Kura-kura Kaki Gajah, Manouria emys

Judul: Management of Sumatran Elephant Welfare and Utilization as a Tourism Object in Serulingmas Wildlife Recreation Park, Banjarnegara
Abstrak: Gajah Sumatra merupakan satwa kategori kritis terancam punah. Kondisi tersebut menyebabkan perlu peran lembaga konservasi eksitu, salah satunya adalah Taman Rekreasi Margasatwa Serulingmas. Penelitian bertujuan menganalisis pengelolaan dan tingkat kesejahteraan Gajah Sumatra, mengidentifikasi bentuk pemanfaatan Gajah Sumatra, menganalisis persepsi dan preferensi pengunjung terhadap pemanfaatan Gajah Sumatra, serta merumuskan strategi pengembangan pemanfaatan Gajah Sumatra. Data didapatkan dari observasi lapang, studi literatur, wawancara dengan animal keeper dan pengunjung. Penilaian implementasi kesejahteraan Gajah Sumatra dalam kategori sangat baik dengan nilai rata-rata 89,96. Bentuk pemanfaatan Gajah Sumatra di TRM Serulingmas meliputi kegiatan pemberian pakan, berfoto, menyentuh gajah dan display gajah. Secara keseluruhan pengunjung memiliki persepsi yang baik, dengan nilai rata-rata TCR 82,94% untuk pengelolaan kesejahteraan Gajah Sumatra dan TCR untuk pemanfaatan gajah sebagai objek wisata sebesar 79,22%. Mayoritas pengunjung tertarik dengan keberadaan Gajah Sumatra di TRM Serulingmas. Strategi pengembangan pemanfaatan Gajah Sumatra dapat dilakukan dengan penetapan harga biaya tambahan, pengembangan program wisata dan peningkatan sarana dan prasarana wisata., Sumatran elephants are critically endangered. This condition calls for the role of exsitu conservation institutions, one of which is Taman Rekreasi Margasatwa Serulingmas. The study aimed to analyze the management and welfare level of sumatran elephants, identify the form of utilization of sumatran elephants, analyze visitor perceptions and preferences for the use of sumatran elephants, and formulate a development strategy for the use of sumatran elephants. Data were obtained from field observations, literature studies, interviews with animal keepers and visitors. The assessment on sumatran elephants welfare management resulted in a score of 89.96, or in good category. Sumatran elephants were used in tourism activities, which included feeding, taking pictures, touching elephants and elephant displays. Overall, visitors had good perception of welfare management of sumatran elephants with TCR score of 82.94% and the use of sumatran elephant as a tourist attraction with TCR score of 79.22%. The majority of visitors were interested in the presence of sumatran elephants in TRM Serulingmas. The strategy propose for developing the use of sumatran elephants include setting surcharge prices, special member promotions, developing tourism programs and improving tourist facilities and infrastructure.
Keyword: gajah sumatra, kesejahteraan satwa, pemanfaatan, wisata

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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