Judul: Management and Economic Valuation of Rhinoceros Hornbill in Bird Park TMII
Abstrak: Rangkong badak banyak diburu oleh masyarakat karena memiliki nilai ekonomi yang tinggi. Salah satu upaya untuk mengurangi kepunahan spesies akibat perburuan adalah dengan melakukan konservasi ex situ. Penelitian ini bertujuan untuk mengidentifikasi aspek pengelolaan rangkong badak (Buceros rhinoceros) secara ex situ dan menghitung nilai ekonominya berdasarkan biaya pemeliharaan dan willingness to pay pengunjung Taman Burung TMII untuk memelihara dan memanfaatkan rangkong badak sebagai satwa peraga. Hasil penelitian ini menunjukkan rangkong badak di Taman Burung TMII belum mengalami perkembangan jumlah individu karena belum terjadi perkawinan. Seluruh aspek pengelolaan yang dilakukan sudah cukup baik. Akibat pandemi Covid-19, jumlah tenaga kerja lapang dikurangi sehingga menyebabkan pekerjaan yang dilakukan menjadi lebih banyak. Nilai ekonomi rangkong badak berdasarkan biaya pemeliharaan yang dikeluarkan setiap bulannya sebesar Rp 2.620.000. Nilai ekonomi berdasarkan willingness to pay dari pengunjung untuk memelihara rangkong badak sebesar Rp 1.064.737 per ekor dan untuk pemanfaatan sebagai satwa peraga sebesar Rp 15.105., Rhino hornbill is hunted by many people because of its high economic value. One of the efforts to reduce the species extinction due to illegal hunting is to carry out an ex situ conservation. This study aims to identify the aspects of ex situ management of rhino hornbill (Buceros rhinoceros) and calculate its economic value based on maintenance costs and 'willingness to pay' by the visitors of TMII Bird Park to take care and use rhino hornbill as a display animal. The results of this study indicate that the individuals number of rhino hornbill in the TMII Bird Park has not increasing because there has not been any mating. All aspects of management carried out are quite good. Due to the Covid-19 pandemic, the number of field workers has been reduced, causing more work to be done. The economic value of the rhinoceros hornbill is based on the monthly maintenance costs of IDR 2,620,000. The economic value based on the willingness to pay by the visitors to take care rhino hornbill is IDR 1,064,737 per individuals and for the use of display animals is IDR 15,105.
Keyword: Management, rhinoceros hornbill, willingness to pay

Judul: Javan Hawk-eagle Welfare Management and Utilization as Display Animal in TMII Jakarta Bird Park
Abstrak: Ketertarikan pengunjung merupakan salah satu aspek yang menjadi pertimbangan bagi pengelola Taman Burung TMII dalam memanfaatkan elang jawa sebagai satwa peraga. Penelitian ini bertujuan menilai tingkat kesejahteraan elang jawa di Taman Burung TMII Jakarata dan menghitung nilai ekonomi elang jawa berdasarkan kesediaan membayar oleh pengunjung atas setiap bentuk atraksi elang jawa sebagai satwa peraga. Penelitian ini dilaksanakan di Taman Burung TMII Jakarta pada bulan Maret sampai April 2021. Metode yang digunakan adalah observasi lapang, wawancara, dan studi literatur. Hasil penelitian menunjukkan bahwa capaian implemetasi kesejahteraan elang jawa di Taman Burung TMII termasuk kedalam kategori sangat baik. Persepsi responden cenderung setuju mengenai pemanfaatan elang jawa sebagai satwa peraga. Nilai total WTP yang bersedia responden keluarkan terhadap interaksi elang jawa sebagai satwa peraga adalah sebesar Rp 57.050 dengan rataan jumlah pengunjung 8474 orang per bulan dengan total pendapatan ekonomi sebesar Rp 483.441.700/bulan., Visitors' interest is one aspect that becomes a consideration for the management of the TMII Bird Park in utilizing the Javan hawk-eagle as a display animal. This study aims to assess the welfare of the Javan hawk-eagle in the TMII Jakarta Bird Park and calculate the economic value of Javan hawk-eagle based on the visitors’ willingness to pay for every form of Javan hawk-eagle attraction as a display animal. This research will be conducted at the TMII Bird Park in Jakarta from March to April 2021. Methods used for data collection are field observations, interviews, and literature studies. The Results that the achievement of the implementation of the welfare of the Javan eagle in the TMII Bird Park is included in the very good. Respondents' perceptions tend to agree about the use of the Javan eagle as a display animal. The total value of WTP that respondents are willing to spend on the interactions and attractions of the Javan eagle as a display animal is Rp. 57,050. with an average number of visitor of 8747 people/month with a total economic income of Rp 483.441.700/month.
Keyword: Javan Hawk-eagle, welfare, willingness to pay (WTP) analysis

Judul: Construction of Strongly Optimal Binary Linear Code with Minimum Distance 9 and 11
Abstrak: A binary linear code of length n over q F is a subspace of n q F . A code has three parameters that attached to it, namely length, dimension, and minimum distance. A code with length n, dimension k and minimum distance d is often called [n, k, d ]-code. Usually, when two parameters are given, then we want to find a code that has the best value for the last parameter. Based on Gilbert- Varshamov bound, if a [n, k, d ]-code exists and can not be expanded, we call it a strongly optimal code. In this paper, we construct strongly optimal code with minimum distance 9 and 11. In constructing the code, we created a theorem and algorithm based on Gilbert-Varshamov bound before we implement the algorithm to MAPLE programming language. Because of computational limitations, the program can only construct up to k = 10 for d = 9 and k = 12 for d = 11.
Keyword: