Judul: Profil Kandunga Karbon pada Tegakan Puspa (Schima wallichii Korth)
Abstrak: Schina represents one of vegetation type in the forest ecosystem growing at HTI PT. Musi Hutan Persada, South Sumatera.
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Judul: Composition and Stand Structure of Puspa (Schima wallichii (DC.) Korth. in Mount Halimun Salak National Park, Sukabumi
Abstrak: Puspa termasuk salah satu jenis tumbuhan dataran tinggi yang mampu tumbuh di lahan kritis, sehingga dapat digunakan untuk memulihkan area hutan pegunungan yang rusak. Penelitian ini bertujuan untuk menganalisis komposisi jenis, struktur tegakan Schima wallichii (DC.) Korth. dan aspek biofisik tegakan Schima wallichii (DC.) Korth. di zona inti TNGHS. Metode penelitian ini menggunakan analisis vegetasi dengan plot yang ditempatkan secara purposive sampling. Hasil penelitian menunjukkan bahwa komposisi jenis memiliki kerapatan tinggi sampai rendah berturut-turut dari semai sampai pohon. Keseluruhan plot pada lokasi penelitian didominasi oleh Schima wallichii (DC.) Korth. Struktur tegakan hutan pada seluruh plot menunjukkan pola hubungan jumlah pohon dengan kelas diameter membentuk kurva membentuk “J” terbalik (eksponen negatif). Sebaran puspa dalam plot penelitian menunjukkan sebaran mengelompok. Hal tersebut berdampak baik untuk proses regenerasi alami. Seluruh aspek biofisik yang diukur pada plot penelitian relatif seragam., Puspa is one of the highland plant species that can grow on critical land, so it can be used to restore damaged mountain forests. This study aims to analyze the species composition, stand structure of Schima wallichii (DC.) Korth. and biophysical aspects of Schima wallichii (DC.) Korth. stands in the core zone of TNGHS. This research method uses vegetation analysis with plots placed by purposive sampling. The results showed that the species composition had high to low density from seedling to tree, respectively. The entire plot at the research site was dominated by Schima wallichii (DC.) Korth. The structure of forest stands in all plots showed a pattern of relationship between the number of trees and diameter class forming an inverted "J" curve (negative exponent). The distribution of puspa in the research plot shows a clustered distribution. This has a good impact on the natural regeneration process. All biophysical aspects measured in the research plots were relatively uniform.
Keyword: puspa, regeneration, TNGHS, vegetation analysis

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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