Judul: Kajian pencegahan penambangan pasir di taman nasional Bromo Tengger Semeru Jawa Timur melalui pengembangan budidaya jamur tiram putih (Pleuratus ostreatus) (studi kasus di dusun Karangsuko, desa Taman Satrian kecamatan Tirtoyudo kabupaten Malang Jawa Timur)
Abstrak: One of countryside that abut on TNBTS is Taman Satrian Countryside and as countryside prop. Status is referred as indirectly will push them to interact and exploit forest resources like wood intake or sand mining. Sand Mining is one of interaction that happened in the countryside referred as to forest resources specially in national park.Factor that push the happening of interaction .is have not yet enough basic needs , so society still need earnings addition, because if society basic needs has been fulfilled from prop zone, then will not enter national park and to maintain and protect it (Nasendi, 1986). An implementable program to improve society prosperity and remain to care of continuity Bromo Tengger Semeru National park is by develop conducting effort.Mushroom White Oyster (Pleuratus ostreatus). This Research bent on to know mineworker perception to national park, sand mining and anticipate wether development Mushroom white oyster can prevent mining with three indicators, that is perception, economy value and in working networ.
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Judul: Studi Pemanfaatan Kawasan Laut Pasir Di Taman Nasional Bromo Tengger Semeru
Abstrak: Taman Nasional Bromo Tengger Semeru merupakan satu-satunya kawasan konservasi yang mempunyai keunikan berupa laut pasir. Metode yang digunakan untuk melihat persepsi pengunjung dan masyarakat menggunakan kuesioner dalam bentuk close ended dan menggunakan teknik skala likert . Analisis data dilakukan secara deskriptif dan menggunakan uji statistik chi square. Persepsi dari responden mendapatkan skor 5 (agak setuju) untuk jenis kegiatan yang dilakukan dan kondisi kawasan. Responden memberikan skor 3 (kurang setuju) untuk sumberdaya alam yang dimanfaatkan. Uji chi square untuk aspek persepsi menunjukkan bahwa nilai X2 hitung < X2tabel sebesar 0,95 < 12,59 hal ini menyatakan bahwa jawaban dari responden tidak memiliki perbedaan/ hubungan terhadap pertanyaan yang diberikan. Responden memberikan skor 5 (agak setuju) terhadap dampak ekonomi dan dampak ekologi yang ditimbulkan dari kegiatan pemanfaatan. Uji chi square untuk aspek dampak menunjukkan bahwa nilai X2 hitung > X2tabel sebesar 13,83 > 7,81 hal ini menyatakan bahwa jawaban dari responden memiliki perbedaan/ hubungan terhadap pertanyaan yang diberikan.
Keyword: dampak kegiatan pemanfaatan, laut pasir, pemanfaatan kawasan

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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