Judul: Etnobotani Pangan Masyarakat Suku Dayak Kenyah di Sekitar Taman Nasional Kayan Mentarang Kalimantan Timur
Abstrak: Dayak Ethnic of Kayan Mentarang Nasional Park (KMNP) consists of several Dayak sub ethnics, one of them is Dayak Kenyah. It has unique characteristic in the use of plants, particularly food plants, which needed to be documented. This research was aimed to identify the diversity of food plants and local wisdom of Dayak Kenyah tribe in food plants use. This research was conducted in Long Alango Village, Subdistrict of Bahau Hulu, National Park Section Management (NPSM) Region II Kayan Mentarang Nasional Park, Malinau, East Borneo on March - April 2011. Research methods used consist of literature study, field survey, interview using questionaire, herbarium sample making and identification, and data analysis. The research had identified 139 spesies of food plants that used by Dayak Kenyah tribe of KMNP, which consisted of 32 species of wild food plants (origin from forest), 46 species of wild food plants that had been cultivated, and 61 species of cultivated food plants. All those species could be processed into carbohydrate source, vegetables, complementary food, and beverages. Among all the foods source that consumed by Dayak Kenyah ethnic, there are several species of rice plant like pa’dai bere, pa’dai ba’an, pa’dai putik, and pa’dai adan. The largest habitat types of food plants was garden and forest (33%), then followed by forest/wild habitat (23%), the bund of irrigated rice field (16%), garden (15%), unirrigated agricultural field and jekkau (6%), yard (6%), and irrigated rice field (1%). Local wisdom of Dayak Kenyah tribe were the use of food plants when hunting, cultivation of food plants from forest in garden, cultivation system, etc. Conclusion of this research shows that Dayak Kenyah tribe of KMNP used various plants for various needs of foods, and Dayak Kenyah ethnic has local wisdom in the use of food plants.
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Judul: Etnobotani dan Potensi Tumbuhan Berguna di Kampung : Keay, Kabupaten Kutai Barat, Kalimantan Timur.
Abstrak: Keay Village is one of villages in West Kutai Regency, East Kalimantan. There are four ethnic groups occupying this village, i.e. Dayak, Javanese, Toraja, and Bugis. Dayak is the dominant ethnic group occupying the village, which still has traditional wisdom/knowledge in plants use. Ethnobotany is expected to document and hand on the knowledge of Dayak Benuaq ethnic group in using plants, and keep the knowledge from being loss. Data were collected through literature study, interview, field survey and inventory, vegetation analyses, and herbarium collection. Data on plants species found were classified in to classification of use, classification of illnesses, habitués percentage and parts of plants used, important value index, Shannon-Wienner species diversity index, and percentage of useful plants potential. There were 396 plant species found through ethnobotany and vegetation analyses, which was categorized into three categories i.e. plant species found through ethnobotany (285 species), plant species found through vegetation analyses in natural forest (158 species), plant species found through vegetation analyses in hevea plantation (34 species). There were 285 species belong to 78 families which uses had been known and grouped into 16 use groups. There were 53,79% of plants species in natural forest had the potential as useful plants, while in hevea plantation there were 50% of that species had the potential as useful plants. Dominant plant species in natural forest was keranyiq (Fordia johorensis) with IVI (Important Value Index) of pole level as much as 19,69%, sapling (25,46%), and seedling (24,67%). In hevea plantation, dominant plant species was hevea (Hevea brasiliensis) with IVI the highest IVI of tree level as much as 300%, pole (284,63%), sapling (143,59%), and seedling (52,42%). Plants use most widely used for medicinal as much as 95 species of 43 families. The community uses more plants from the forest than from the plantation, because there were more useful plants species in the forest. Potential useful plants at the forest of Keay village included mara uleq (Eurycoma longifolia), uwe (Korthalsia sp., Calamus sp., Daemonorops sp.), empulung (Asplenium nidus), and kerakap (Platycerium bifurcatum). Other potential other than plants potential in the natural forest was hevea (Hevea brasiliensis).
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Judul: Analisis Kestabilan Model Virus Komputer dengan Infeksi Tunda dan Pemulihan Tunda.
Abstrak: In this paper, a dynamical model is composed of computer virus model that considers time delay of infection and recovery processes. Stability analysis is performed to both models, i.e. the models with and without time delay. The model without time delay has two fixed points, which one of them is stable and the other is unstable. On the other hand, the model with time delay has fixed points which one of them is spiral stable. If the value of time delay is sufficiently large, then it will imply the stability changes from spiral stable to spiral unstable and subsequently the appearance of limit-cycle and Hopf bifurcation.
Keyword: computer virus model, Hopf bifurcation, time delay