Judul: Fisheries Management Inland Water In Sebangau and Katingan Rivers Sebangau National Park Central Kalimantan
Abstrak: The Sebangau and Katingan Rivers which flow over ± 200 km and ± 650 km respectively. Parts of the river’s bodies constitute outer boundary of the Sebangau National Park (SNP) conservation area Central Kalimantan. Both of the rivers have abundant freshwater resources and exploited through capture fisheries activities. The fishing grounds are located in main and tributaries. The main area of Sebangau River is an open area while the tributaries area is a private area. The problem formulation in this study is that the management system in Sebangau and Katingan Rivers share different conditions. Private area in Sebangu tributaries with rights-based fisheries. Meanwhile, the entire area of Katingan River with open fisheries. The presence of fisheries management in both rivers is identified to decide if its presence should be maintained or otherwise. This research aims to identify the presence of inland fisheries management system in the Sebangau and Katingan Rivers by describing exogenous factors, actor participation, and interaction patterns. This research will give benefit to science and inland fisheries management system recommendations. This study was located at Sebangau and Katingan River, covering main and tributaries channel, where the research has been perfomed during October-December 2019. The methods consisted of descriptive with qualitative approach through both primary data (observation, interview, and documentation) and secondary data (the documented studies) collection. Analysis data was composed of content analysis (data reduction, data display, and verification) and analysis of management system based on Ostrom’s Institutional Analysis and Development framework (2014). The main informants of the study were 30 fishermen. The results of this study identified based on three exogenous factors, actor participation, and interaction patterns. The first exogenous factor is the river's biological condition, which has capture fishery resource of eight types of fish families per river. The Channidae family has the highest number of species in each river. The river’s physical condition is influenced by the forest’s peat swamp and produces black waters. However, the main Katingan River has cloudy brown color. The second exogenous factor is the community attribute including socio-economic condition of the fishermen. The social capital used is based on kinship and relationship patterns. Economic activities occurs from capture fishery which is influenced greatly by environmental conditions that’s why fishermen's income is exposed to uncertainty. The third exogenous factor is the adopted formal rules which is controlled by the Sebangau National Park Management Office and informally originated from the fishermen's agreement. Both rules are used to maintain fishing activities and the use of river resources. The existing regulations need to be completed to cover all capture fisheries activities. The actor participation were included fishermen, damang, field facilitators from SNP Management Office and WWF Central Kalimantan. The actors build the associative and dissociative interaction patterns by involving river resources. Based on the research results, it can be concluded that the presence of inland fisheries management system in Sebangau River can maintain rights-based fisheries, by involving right-fishermen to maintain the river management with SNP Management Office. Katingan River can maintain open fisheries with support for environmental conservation activities and full control from SNP Management Office.
Keyword: Capture Fisheries, Katingan, National Park, Right-based Fisheries, Sebangau

Judul: Model of marine national park development: optimization of capture fisheries management in Karimunjawa National Park
Abstrak: Karimunjawa National Park (KNP) inhabited mostly by fishery household, surrounds by 111.625 ha of waters. Fishing zone is dedicated for traditional fisheries. Therefore the capture fisheries in KNP should be adjusted to accommodate conservancy and utilization objectives. The objectives of the research are: (1) to design management model of capture fishery in KNP; and (2) to design fishing zone model within traditional fishery zone. To address problems related to the park’s management, a system approach was used in this research. Method for evaluating park’s management effectiveness was multi-criteria analysis (MCA) with bio-physic, social economic, and management aspects, and also economic valuation. Managerial model of capture fisheries was performed by implementing some analyzes: comparative performance index (CPI), bioeconomic, linear goal programming (LGP), MCA, feasibility study, and institutional analysis. Model of fishing zone is performed by using geographical information system (GIS). Strategic policy was conducted by using strength weaknesses opportunity and threats (SWOT) and interpretative structural modeling (ISM). Evaluation of park’s management show the value 0,44 on scale 0 to 1 or effectiveness level at 44%. Governance aspect provides the largest contribution in the assessment, followed by economic and biophysical aspects. The economic valuation result Rp. 53.051 million. Fishing activities accounted for the largest value Rp. 30.513 million (58%). The managerial model of capture fisheries named PITASI is composed by the leading fish from reef fish is jack trevallies and anchovy for pelagic fish. Reef fish potency is 149 ton/year and pelagic fish 19.080 ton/year. The optimal number of fishing gear for reef fisheries are hand line 336 units and trap 21 units; for pelagic fish are troll line 336 units, boat lift net 115 units, and gillnet 168 units. Hand line and fish trap for reef fisheries, and troll line, boat lift net, and gillnet for pelagic fisheries, are competent to develop continuously in KNP. The fishing zone is divided to be three areas: (1) 0-3 nautical mil (nm) from coastal line is for reef fisheries (hand line and fish trap); (2) 3-4 nm is for pelagic fisheries (gillnet and boat lift net); and (3) more than 4 nm is for pelagic fisheries with dynamic fishing gear (troll line). Fisheries management strategic includes developing potency of fish resources, increasing institutional capacity, and also monitoring and law enforcement. Strategy of implementation model includes five elements are affected society sector, the main constraints, the measuring standard, required activities, and involved institutional.
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Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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