Judul: Biosintematika syzygium malaccense (L.) Merr & Perry di Sulawesi Selatan
Abstrak: S. malaccense mempunyai keanekaragaman pada daun, bunga dan buah. Penelitian S. malaccense dipandang perlu tidak hanya karena adanya dugaan bahwa tanaman ini telah mengalami erosi genetika, tetapi juga karena masih kurangnya informasi yang mengungkapkan tentang keanekaragaman dan hubungan kekerabatannya dari berbagai aspek, khususnya di Sulawesi Selatan yang diduga mempunyai keunikan tersendiri. Penelitian ini bertujuan untuk melihat keanekaragaman ciri morfologi, anatomi, sitologi, dan pola pita isozim S. malaccense di Sulawesi Selatan. Selanjutnya informasi keanekaragaman tersebut dimanfaatkan untuk membuat pengelompokan dan menganalisis kekerabatannya. laksanakan sejak Mei 1993 sampai Maret 1995. Pengamatan morfologi dilakukan di lokasi pengambilan sampel dan dilengkapi dengan pengamatan koleksi kering, koleksi basah, dan koleksi semai dan pengamatan anatomi daun kromosom dilakukan di Herbarium Bogoriense,..dst
Keyword: Syzygium malaccense, morfologi, anatomi, sitologi

Judul: Keanekaragaman, Struktur Populasi dan Pola Sebaran Syzygium di Gunung Baung Jawa Timur
Abstrak: The research of Syzygium diversity, its population structure and the distribution patterns were conducted in Gunung Baung Nature Park, East Java. A total of five block locations, each comprising five transect sections, were purposively selected to obtain data of the taxon diversity, population stucture and distribution patterns. The importance value index, the individual number of each stratum (stage class) (i.e. seedlings, saplings, poles and trees) and variance-to-mean ratio were calculated. The principal component analysis, cluster analysis, multiple linear regressions and canonical correspondence analysis were performed to determine the relationships between abiotic and biotic factors in regard with the presence of Syzygium. There were six species of Syzygium in Gunung Baung, Pasuruan, namely S. cumini, S. polyanthum, S. littorale, S. pycnanthum, S. racemosum, and S. samarangense. The population structure of Syzygium varied considerably, only S. pycnanthum and S. racemosum had an ideal structure. This was presumably due to some problems faced by the genus in the process of regeneration, especially during the seedling phase. The distribution patterns of the Syzygium members were generally grouped prefering fertile sites on the slopes. Altitude and the number of bamboo clumps became the determinant (influencing) variables affecting significantly the existence of Syzygium in this mount.
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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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