Judul: Ecological Condition and Ecotourism Potency at Timbulun Waterfall area, Sungai Nanam Village, Solok District, West Sumatera
Abstrak: Timbulun Waterfall area is a beautiful place with the stream current as one aquatic resource at Sungai Nanam Village. These resources have an important value for community in area, such as drinking water and tourism. However, human activities around the area, such as agriculture and tourism activities are not control will effect for degradation in Timbulun Waterfall area. Tourism is one the economic activities that increase fast. This condition causes development of other sector that gives negative effect at area, such as transportation development and home stay. Therefore, management is a must. This study was carried out to asses the resources quality condition based on variable of physic, chemical, and biochemical aquatic. Observation of environmental variable came from 3 stations during February 2013 to March 2013. The Analysis was done mainly ecological analysis in Timbulun Waterfall area and potential matrix of ecotourism area in Timbulun Waterfall. This result of study shows that Timbulun Waterfall area has ecological aquatic environmental condition is very natural and not yet disturbance and pollution from human activities. Based on ecological analysis shows that there are 11 potential of environmental component to development as object in ecotourism activities in Timbulun Waterfall area, such as waterfall height, waterfall pool, natural scenery, bird and fish existance, topography, vegetation coverage, current and water color. Potential value of ecotourism in Timbulun Waterfall area is 77.77% or has potential for ecotourism development. Development potential of ecotourism area must be based ecological condition, especially to key parameter in ecosystem, such as temperature, oxygen demand, and biochemical oxygen demand. Therefore, management and utilization potential area, especially for ecotourism activities can be continuing.
Keyword: Ecology, Ecotourism, Potency, Timbulun, Waterfall

Judul: Analisis pengembangan ekowisata di kawasan suaka alam (Studi kasus cagar alam Tangkoko-Duasudara, Sulawesi Utara)
Abstrak: Ecotourism operation in Tangkoko-Duasudara Nature Reserve (TDNR) has generated very complex problem due to its status as preservation area, while ecotourism activity increasing and was no longer possible to be discontinued. Therefore, a policy action formulating management and development of ecotourism in TDNR is needed. Field survey was used as a method concerning standard criterion assessment of objects and natural recreation fascination. Research result indicated that area of TDNR was high potency to be developed for ecotourism, with a lot of interesting objects within the TDNR, a unique and endemic biodiversity of flora and fauna. There are three potential interpretation paths i.e. Lingkar Path; Puncak Path and Kumeresot Path, where all unique attractions could be observed. It also indicated that policy zoning was become first order policy. Suggested strategies are cooperation among stakeholders in managing cultural and natural resources; improvement of service; improvement of accommodation; improvement of facilities and infrastructure to support going concern development. Planning of integrated development from all stakeholders with principles of co-management is also recommended
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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.
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