Judul: Karakteristik Ekologi, Potensi dan Upaya Konservasi Tumbuhan Tebu Rawa (Hanguana malayana) di Kabupaten Mappi, Papua
Abstrak: Hanguana is known as endemic plant in Papua, grows rapidly in the river of Obaa, Miwamen, Keeme, Widelman and Eilanden. Its presence is considered to become obstruction of river transportation, at the same time it is consumed by local people. Hanguana’s ecological characteristic and its potency have not been studied intensively. This research is aimed to study its ecological characteristic, to analyze the content of its primary and secondary metabolism compounds, its conservation efforts and to identify the local wisdom of Mappi indigenous people on this plant. The methods employed in this research are site observation, direct measurement, laboratory analysis, and interview with the local people at the observation sites. Purposive sampling method is utilized to determine the sampling of survey sites, interview with local people and local government officers. Hanguana is an aquatic plant therefore the tip of its stems and stolons up to its tip of the leaves are above the surface of the water while its roots, stems, and stolons are growing submerged under the water. Its roots are not attaching to any substrate. Ecological characteristics of the river water has a pH of approximately 4, temperature ranges from 28.2° to 30° C and total dissolved solid (TDS) of 6-8 ppm. The monthly average of rainfall varies between 46 to 391.5 mm. The soil of river base has an organic content of C of 1.67% (w/w), nitrogen 0,21% (w/w), potassium 279.44 ppm, phosphor 280.90 ppm and C/N ratio of 7.95. The vegetations that grow at the surrounding of Hanguana include Oryza rufipogon, Eleocharis dulcis, Pandanaceae, Nuclea grandifolia. Melaleuca symphiocarpa and Livistona benthamii are the common vegetations that grow at the river banks at the observation sites. Laboratory analysis results of Hanguana’s stem contain primary metabolism compounds are ccarbohydrate 2.62% (w/w), protein 2.7% (w/w), sucrose 0.01% (w/w), glucose <0.01% (w/w), fructose <0.01% (w/w), while secondary metabolism compounds are anti-oxidant 340.29 ppm, and toxicity of 1438.79 ppm. The stolon’s content primary metabolism compounds are carbohydrate 18.59% (w/w), protein 1.57%(w/w), sucrose <0.01%(w/w), glucose 0.5% (w/w) and fructose 0.38%(w/w), while secondary metabolism compounds are flavonoid 1.27%(w/w), tanin 0.30% (w/w), and toxicity of 712.84 ppm. Furthermore, Hanguana’s leave contains secondary metabolism compounds are flavonoid 1.54% (w/w), tanin 0.30% (w/w), fiber 32.03% (w/w), and toxicity of 850.70 ppm. Due to those compounds content, Hanguana is believed to have a potential as a medicine for prevention of cardiovascular diseases.
Keyword: 

Judul: Keanekaragaman Tumbuhan Pangan dan Obat pada Masyarakat Suku Mbaham Mata di Kampung Werabuan, Kabupaten Fakfak
Abstrak: The society of Papua still depends on forest resources, plants and animals, to fulfill their daily needs. Particularly, the utilization of food and medicinal plants has been done hereditarily until now. The aim of this research is to identify the diversity of food and medicinal plants, also to identify the local wisdom of Mbaham Mata Tribe on the utilization of plant resources. Data collection was done using semi-structured interview and snowball technique. Food plant species which is identified as much as 35 species from 21 family, while medicinal plants are 41 species from 28 family. Beside that, there are 25 species which is identified from 21 family which are utilized as functional food plant. Functional food plant is plants that has double function, as food and also medicine. The society of Mbaham Mata Tribe is still utilizing available plant resources and there are some rituals on doing conservation activities. The local wisdom of the society on plant conservation can be seen on the sasi installation ritual, prohibition to enter the forest, nahahara.
Keyword: 

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: