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: Distribution of Puspa (Schima wallichii (DC.) Korth.) in Kawah Ratu Resort, Gunung Halimun Salak National Park, West Java
Abstrak: Puspa (Schima wallichii) merupakan jenis tumbuhan yang mendominasi di kawasan Taman Nasional Gunung Halimun Salak terutama di Resort Kawah Ratu. Jenis puspa termasuk salah satu jenis tumbuhan dataran tinggi yang dapat tumbuh di lahan kritis. Tujuan penelitian ini adalah untuk mengidentifikasi pola penyebaran dan potensi permudaan jenis puspa (S. wallichii) di Resort Kawah Ratu, Taman Nasional Gunung Halimun Salak, Jawa Barat. Pengambilan data dilakukan dengan analisis vegetasi dengan metode petak tunggal seluas 1 ha pada setiap lokasi. Penelitian dilakukan di Blok Pamengpeuk dan Blok Leles. Jenis yang ditemukan pada kedua lokasi penelitian sebanyak 98 jenis. Hasil penelitian menunjukkan pola penyebaran puspa (S. wallichii) adalah mengelompok, baik di Blok Pamengpeuk maupun di Blok Leles. Penyebaran mengelompok menandakan adanya pertumbuhan permudaan yang baik. Kemampuan regenerasi puspa di kedua lokasi tergolong baik karena jumlah individu permudaan puspa lebih banyak daripada individu pohonnya., Puspa (Schima wallichii) is a type of plant that dominates the area of Gunung Halimun Salak National Park, especially at Kawah Ratu Resort. Puspa type is one of the upland plant species that can grow in critical land. The objective of this study is to identify the distribution pattern and the potential for regeneration of puspa species (Schima wallichii) at Kawah Ratu Resort, Gunung Halimun Salak National Park, West Java. Data were collected by analyzing vegetation with a single plot method covering an area of 1 hectare at each location. The research was conducted in the Pamengpeuk Block and the Leles Block. The species found in the two research locations were 98 species. The results showed that the distribution pattern of puspa was clustered, both in the Pamengpeuk block and in the Leles block. A clustered spread indicates good youth growth. The ability of puspa regeneration in both locations was quite good because the number of puspa regeneration individuals was more than the individual trees.
Keyword: distribution, Gunung Halimun Salak National Park, Kawah Ratu Resort, puspa, Schima wallichii, distribution, Gunung Halimun Salak National Park, Kawah Ratu Resort, puspa, Schima wallichii

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.
Keyword: