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: Management of Maintenance, Utilization and  Economic Value of the Javan Eagle at the Bogor Indonesian Safari Park
Abstrak: Elang jawa merupakan satwa dilindungi oleh Pemerintah Indonesia dan IUCN dengan kategori Endangered (IUCN 2016). Elang jawa terus terancam sehingga dipelukan upaya konservasi eksitu, salah satunya dilakukan di Taman Safari Indonesia (TSI) Bogor. Penelitian ini bertujuan mengidentifikasi manajemen pemeliharaan, pemanfaatan, dan nilai ekonomi burung elang jawa di TSI Bogor. Penelitian dilakukan dengan metode observasi lapang, wawancara, dan studi pustaka. Hasil penelitian menunjukkan bahwa pemeliharaan elang jawa di TSI Bogor telah terlaksana cukup baik. Pemanfaatan elang jawa berupa wisata edukasi, pelepasliaran, dan sarana penelitian. Nilai persepsi pengunjung terkait pelestarian elang jawa diperoleh sebesar 82,6 % dengan preferensi pengunjung menjadikan elang jawa sebagai satwa obyek wisata prioritas urutan ke-2. Nilai ekonomi elang jawa berdasarkan biaya pemeliharaan sebesar Rp7.097.200 /ekor/bulan, nilai rata-rata WTP untuk mendukung upaya konservasi elang jawa sebesar Rp94.850 dengan nilai ekonomi total perbulan sebesar Rp6.029.140.250, dan nilai rata-rata WTP untuk pengembangan pemanfaatan elang jawa sebesar Rp70.005 dengan nilai ekonomi total perbulan sebesar Rp4.449.867.825., The Javan eagle is a protected animal by the Indonesian Government and IUCN in the Endangered category (IUCN 2016). The Javan eagle continues to be threatened, so ex-situ conservation efforts are needed, one of which is being carried out at Taman Safari Indonesia (TSI) Bogor. This research aims to identify maintenance management, utilization and economic value of Javan eagles at TSI Bogor. The research was conducted using field observation, interviews and literature study methods. The results of the research show that the maintenance of Javan eagles at TSI Bogor has been carried out quite well. Javanese eagles are used in the form of educational tourism, releases and research facilities. The visitor perception value was obtained at 82.6 % with preferences including the 2nd priority. The economic value of the Javan eagle based on maintenance costs is IDR 7,097,200 / head / month, theaverage WTP value to support Javanese eagle conservation efforts is IDR 94,850 with a total monthly economic value of IDR 6,029,140,250, and the average WTP value for development of the use of Javanese eagles amounting to IDR 70,005 with a total monthly economic value of IDR 4,449,867,825.
Keyword: Nilai ekonomi, Pemanfaatan, Pemeliharaan

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.
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