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: Preservation Techniques and Visitor Perception  Towards Conservation Efforts at TMII Jakarta Bird Park Jakarta
Abstrak: Kuau raja merupakan jenis burung yang populasinya semakin terbatas sehingga diperlukan upaya konservasi ex-situ untuk mendukung upaya pelestariannya. Taman Burung TMII merupakan lembaga konservasi ex situ, sekaligus sebagai sarana eduwisata bagi masyarakat. Penelitian ini bertujuan mengidentifikasi aspek pemeliharaan kuau raja, persepsi dan pengetahuan pengunjung, dan nilai WTP pengunjung terhadap upaya pelestarian kuau raja di Taman Burung TMII. Penelitian ini dilaksanakan di Taman Burung TMII Jakarta pada bulan Maret sampai April 2022. Metode yang digunakan adalah observasi lapang, wawancara, survei, dan studi literatur. Hasil penelitian menunjukkan aspek pemeliharaan sudah cukup baik, namun perlu beberapa perbaikan dan penambahan fasilitas perkandangan dan pakan. Pengunjung memiliki persepsi positif dan pengetahuan cukup tinggi tentang kuau raja sebagai spesies burung dilindungi, dan perlunya usaha pelestariannya baik insitu maupun exsitu. Pengunjung bersedia membayar untuk mendukung pelestarian kuau raja dengan nilai rataan WTP sebesar Rp. 36.111 dengan perkiraan nilai ekonomi total sebesar Rp. 188.968.000,00 perbulan. Faktor tingkat pendidikan terakhir dan besarnya pendapatan pengunjung berpengaruh nyata terhadap besar-kecilnya nilai WTP dari pengunjung., Great argus is a species of bird whose population is increasingly limited so ex-situ conservation efforts are needed to support its conservation efforts. TMII Bird Park is an ex situ conservation and as of tourism-based education for public. This study aims to identify aspects of the maintenance of Great argus, the perception and knowledge of visitors, and the value of visitors' WTP for efforts to preserve Great argus in the TMII Bird Park. This research was conducted at TMII Bird Park Jakarta from March to April 2022. The methods used are field observations, interviews, surveys, and literature studies. The results showed that the maintenance aspect was quite good, but it needed some improvements and additional cage and feed facilities. Visitors have a positive perception and high knowledge about the great argus as a protected bird species, and the need for conservation efforts both in situ and exsitu. The average value of the visitor's WTP is Rp. 36.111 with an estimated total economic value of Rp. 188.968.000 / month. Factors influencing the WTP value of visitor respondents are the last level of education and income.
Keyword: Great argus, preservation techniques, visitor perception

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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