Judul: Kajian Adopsi Circle Hook dalam Perikanan Tuna Longline oleh Commission for The Conservation of Southern Bluefin Tuna (CCSBT) dan Indonesia.
Abstrak: The population of southern bluefin tuna (SBT, Thunnus maccoyii) has been exploited on a large scale. It is caused by several factors, one of which is the use of fishing gear that is not environmentally friendly. This study was conducted to analyze the rules of fishing gear policy in the CCSBT convention, to analyze the process of applying circle hook technology in catching southern bluefin tuna, and to establish the implementation strategy of circle hooks technology in Indonesia tuna fisheries. The data collection of this study was conducted by getting information directly from the stakeholders that related to the implementation effort of circle hook in Indonesia, search of information on official website (internet surfing), and literature. The type of data analysis used a normative juridical analysis, and the pattern of circle hook implementation strategy was identified by using SWOT analysis. CCSBT convention does not regulate the type and the use of fishing gear. CCSBT manages the southern bluefin tuna through predefined rules in convention, which is about the establishment of the number of vessels operating and fishing quota system. The migration of SBT that move in every phase of spawning lead the CCSBT to hand the rule of fishing gear to the members’ national rule based on the criteria of maritime countries passed by SBT migration. The circle hook technology got a good responses by CCSBT and Indonesia, but the application rules have not been ratified yet. The proposed strategies to implement the circle hook in Indonesia tuna fishery are by (1) optimizing the working relationship between the government and WWF Indonesia in supporting the conservation of responsible fisheries resources, and (2) utilizing the partnership opportunities between the government, WWF Indonesia, and the private sector for procurement circle hook.
Keyword: CCSBT convention, circle hook, implementation strategies, southern bluefin tuna

Judul: Southern Bluefin Tuna Fishing Quota Management in Indonesia.
Abstrak: Southern bluefin tuna (Thunnus maccoyii) is kind of big tuna that able to swim very fast and very long distance migration (highly migratory). SBT overfishing due to population decreased. If fishing uncontrollable, SBT will be destroyed, therefore it is endangered species. Commission for The Conservation of Southern Bluefin Tuna (CCSBT) is a Regional Fisheries Management Organization (RFMO) that focus on SBT management. Through appropriate management. CCSBT to ensure conservation and optimum exploitation of SBT. CCSBT adopt management process based on output control. CCSBT apply SBT fishing quota toward every country with Management Procedure (MP). As the member of Commission for The Conservation of Southern Bluefin Tuna (CCSBT), Indonesia shall follow the quota measure of SBT fishing that has determined. Therefore, good management and rules were needed for SBT exploitation in Indonesia in order to align with measures and international regulation that has agreed by Indonesia as part of CCSBT. Indonesia find difficulties to determine SBT fishing quota that due to surplus of SBT National quota. Therefore, management action based on output control through SBT fishing quota is very needed. SBT fisheries system in Indonesia could be identified through related elements with SBT fisheries system. This research will studied some issues that related to : (i) SBT resources, (ii) SBT fisheries exploitation, and (iii) SBT fisheries management. In this research, soft system methodology approach used to compose conceptual SBT quota management model in Indonesia. This research objective are : (1) to describe SBT fisheries in Indonesia, (2) to identify SBT fisheries problems in Indonesia, (3) to analyze SBT fisheries management in Indonesia, (4) to determine catch composition, productivity of tuna long line in Indonesia especially that doing SBT fishing activity, (5) to estimates fishing season, (6) to determine mean size at capture of SBT in Indonesia, and (7) to formulize conceptual fishing quota management model of SBT in Indonesia. Results of research could be concluded : 1. SBT fisheries have a unique character. Generally product of SBT in Indonesia for current 12 years (2002-2013) intend to increased. SBT that landed in Indonesia some of them fished in WPP-RI 573 (the Indian Ocean south of Java until sothern of Nusa Tenggara of south, western Sawu sea and Timor sea) that part of zone number 1 CCSBT statistical area of catch. 2. Common problem of SBT fisheries in Indonesia are : • Indonesia has a crucial area in the sustainability of SBT fisheries resources as spawning ground for SBT but SBT fisheries statistic data is not accurate; • Indonesia as a CCSBT member has not transformed to all obligation that in the CCSBT convention; • Indonesia’s SBT quota has surplus that determined by CCSBT and smaller than capability of Indonesia production. 3. In SBT fisheries management, Indonesia has made policies, such as : • National SBT quota given to two associations ATLI and ASTUIN. • Indonesia has transformed one of obligation that in the convention of CCSBT about fishing vessels registration in the national laws. • Indonesia attempt to find SBT data through Catch Documentation Scheme (CDS). 4. Southern bluefin tuna has the smallest percentage
Keyword: CCSBT, southern bluefin tuna, tuna long line, soft system methodology

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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