Judul: Bambu Di Taman Nasional Bukit Barisan Selatan
Abstrak: Studi bambu di Taman Nasional Bukit Barisan Selatan bertujuan untuk mengetahui keanekaragaman bambu yang tersebar di Taman Nasional Bukit Barisan Selatan dan mengetahui daerah sebaran dan ekologinya. Penelitian ini didasarkan pada pemeriksaan spesimen koleksi bambu dari Taman Nasional Bukit Barisan Selatan. Spesimen tersebut diperiksa morfologi bagian vegetatif dan generatifnya. Dari spesimen-spesimen tersebut hanya tiga jenis yang mempunyai bunga, sedangkan yang lainnya tidak terdapat bunga. Pengamatan ciri morfologi dilakukan dengan melihat bagian-bagian buluh, tunas, pelepah buluh, daun dan perbungaan. Hasil pengamatan morfologi menunjukkan bahwa ada lima marga dengan 15 jenis bambu yang tumbuh tersebar di kawasan Taman Nasional Bukit Barisan Selatan. Marga - marga tersebut yaitu Bambusa, Dendrocalamus, Dinochloa, Gigantochloa dan Schizostachyum. Dari 15 jenis tersebut, 12 jenis telah dipertelakan oleh beberapa ahli sebelumnya yaitu: Bambusa vulgaris, Dendrocalamus asper, Dendrocalamus buar, Dinochloa glabrescens, Gigantochloa atroviolaceae, Gigantochloa apus, Gigantochloa atter, Gigantochloa hasskarliana, Gigantochloa robusta, Schizostachyum brachycladum, Schizostachyum zollingeri dan Schizostachyum bamban. Tiga jenis merupakan jenis baru dan telah dipertelakan yaitu Gigantochloa ciliata Rumyati, Gigantochloa denticulata Rumyati dan Schizostachyum bracteum Rumyati.....dst
Keyword: Gigantochloa ciliata, Gigantochloa denticulata, Schizostachyum bracteum

Judul: Ekologi dan Bioprospeksi Bambu di Kawasan Taman Wisata Alam Gunung Baung Pasuruan Jawa Timur
Abstrak: Bamboo is one of plant taxa comprising various species with high economic potential. Bamboo is a member of Bambusoideae of the Poaceae family. There are 1250 bamboo species in the world, 135 of them are in Indonesia. Not all bamboo species are well known, and only some of them can be found in Java Island. Land use changes reduce bamboo natural habitats in Indonesia. One of the bamboo forests in East Java is found at a conservation area namely Mount Baung Natural Park. The information of bamboo diversity, population structure and the relationship between bamboo and its biotic and abiotic factors in Mount Baung Natural Park is not well known. The aims of the research were to study the ecology of bamboo, the relationship between bamboo growth and its biotic and abiotic factors, and the bio-prospection aspect of this taxon in Mount Baung Natural Park, Pasuruan, East Java. This research was carried out at four different locations from September 2011 to Mei 2012. Those locations were Preserved Area, Rehabilitation Area, Limited Usage Area, and Intensive Usage Area. Data collection was conducted by analyzing the bamboo populations using sampled plots along the transects that were determined by stratified random samplings within four purposive sampled areas. The collected botanical data consisted of the bamboo scientific names, the number of clumps per plot and the diameter of clumps. The environmental data consisted of altitude, solar radiation, temperature-humidity, and soil pH. Soil samples were analyzed at the Soil Chemical Laboratory, Center for Research of Land Resources, Bogor. The abundances and densities of bamboo expressed an importance value index, namely the resultant of the sum of Relative Density, Relative Frequency, and Relative Dominance. The determination of habitat characteristics (i.e. determining the most related factors in relation to the presence of bamboo in their community) were analyzed by statistical correlations using the software STATISTICA Minitab 14. The principal component analysis (PCA) and cluster analysis were performed to determine relationships between abiotic/biotic components and bamboo’s occurrences. Canonical Correspondence Analysis (CCA) was used to determine component relationships. Cluster analysis was used to analyze the similarity of the environmental conditions of the bamboo habitat. Index Cultural Significance (ICS) was performed to determine the bamboo bio-prospecting of bamboo. There were seven species of bamboo in Mount Baung Natural Park, Pasuruan, namely Bambusa blumeana, Bambusa vulgaris, Dendrocalamus asper, Schizostachyum iraten, Gigantochloa apus, Gigantochloa atter and Dinochloa matmat. D. matmat was not described detail in this These due to the very limited number ( < 1%) of individual occurence. Among the six bamboo species, B. blumeana possessed nearly ideal population structure. Bambusa blumeana had the highest important value index 127,97%. The structure of bamboo population was classified based on the clump diameter classes which were: A (< 5 m), B (5-10 m) and C (> 10 m). Based on this category, the bamboo in Mount Baung Natural Park belonged to A phase class. Based on the soil analysis, the location had good soil characteristics and was feasible for bamboo growth, namely silty clay loam, medium CEC (Cation Exchange Capacity) ranging from 10,90 to 18,52
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Judul: Approximation of the Median of Poisson Distribution Using the Relation of Poisson-Gamma Distribution
Abstrak: A major drawback of median is that median cannot usually be defined in closed form, even in the cases where their distribution functions are known. This study gives an approximation of the closed form for the median of the Poisson distribution by using the relation of Poisson-Gamma distribution. The approximation uses elementary techniques based on the monotonicity of certain sequences involving tail probabilities of the Poisson distribution and the Central Limit Theorem. Furthermore, a closed form expression for the mean absolute deviation 􀜧|􀜰􀰒 􀵆 􀜯􀝁􀝀􁈺􀜰􀰒􁈻| is also studied. The median is relevant because of the fact that it minimizes the mean absolute deviation of a Poisson random variable (􀜰􀰒􁈻 by considering median as central tendency.
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