Judul: Development model of coastal regions based on environmentally friendly aquaculture (case study of Tanah Bumbu Regency, South Kalimantan)
Abstrak: Pemanfaatan wilayah pesisir untuk budidaya khususnya budidaya udang pada umumnya kurang memperhatikan aspek lingkungan, sehingga menyebabkan kerusakan hutan mangrove. Di berbagai wilayah pesisir di Indonesia kerusakannya sudah mengkhawatirkan. Salah satu contoh adalah wilayah pesisir Kabupaten Tanah Bumbu, Provinsi Kalimantan Selatan. Kawasan tersebut memiliki potensi sumberdaya perikanan yang cukup besar, dan menjadi andalan sektor perikanan dan kelautan Kabupaten Tanah Bumbu. Peningkatan aktivitas pemanfaatan sumberdaya pesisir yang tidak memperhatikan lingkungan akan berdampak pada rusaknya hutan mangrove. Kegiatan budidaya perikanan yang kurang memperhatikan kaedah teknologi yang benar menyebabkan usaha tersebut kurang berhasil. Pemanfaatan pesisir untuk budidaya udang tidak harus menggunakan teknologi intensif yang sebenarnya mengandung risiko kegagalan yang tinggi. Bagi masyarakat diperlukan teknologi sederhana dan ditambah manfaat dengan penghasilan tambahan dari kawasan khususnya hutan mangrove. Dengan mengkombinasikan kegiatan budidaya dengan teknologi sederhana dan hasil sampingan secara alami dari hutan mangrove mungkin lebih cocok bagi masyarakat pesisir yang memiliki pengetahuan relatif rendah terhadap teknologi budidaya. Penelitian ini dimaksudkan untuk mencari model pemanfaatan wilayah pesisir yang berwawasan lingkungan bagi kegiatan budidaya perikanan.
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Judul: Model of management of capture fisheries area in Banten Bay
Abstrak: Banten Bay is area which quite rapid development for many activities. Industrial waste disposal, domestic, over fishing, coral exploitation, reclamation, vessel traffic, and environmental damage, cause interest multi sector conflict in managing sea area. General objective of the research is to create model of management of sustainable capture fisheries area in Banten Bay. The specific objectives are to (1) determine utilization status and development prospect of capture fisheries; (2) determine leading commodity; (3) determine environmentally friendly fishing gears, (4) establish utilization zone; (5) arrange policy strategy in managing capture fisheries; and (6) simulate of model of management of capture fisheries. Evaluating utilization status and development prospect of capture fisheries was conducted using surplus production method with bionomic model. Determination of leading commodity was conducted with LQ value, IS, and descriptive method. Environmental and sustainable fishing gear was analyzed using CCRF criteria with scoring method approach. Zoning of capture fisheries area utilization was conducted by GIS. Management strategy of capture fisheries area was conducted with SWOT and AHP. Simulate of model of management of capture fisheries was conducted with LGP and model simulation of sustainable fish resources and salary fisherman. The result showed that utilization status and development prospect of capture fisheries in Banten Bay can still be developed for 9 species from 23 species. Squid, anchovy, and crab were commodities with high comparative advantages. Hand line, boat lift net, and gillnet were environmentally fishing gears. Zoning of Banten Bay utilization are consist of aquaculture, recreation, conservation, capture fisheries, fishing port, and industrial zone. Zone of capture fisheries was composed base on fishing ground eligibility indicator, suitability of fishing gear with fishing ground, minimum of conflict potency, availability of infrastructure, and environmental carrying capacity. Capture fisheries zone is divided into three zones, that are (i) passive zone, (ii) passive and outboard fishing boat zone, (iii) active and inboard fishing boat zone. Based on LGP analysis, maximum catch was 1.747,259 ton/year, alocation for fishing gear of gillnet, danish seine net, set lift net, boat lift net, boat seine, hand line, guiding barrier trap, and monofilament gillnet were 3, 11, 11, 6, 2, 5, 0 and 0 unit, respectively. The proposed strategy in managing Banten Bay area were (1) utilization strategic location of Banten Bay with optimalization leading commodity for providing fish demand; (2) taking advantage of high availability of human resources and fisherman concern to manage capture fisheries area; (3) utilization local government support and regional autonomy to make policy in structuring and expansion of fishing area and involving coastal communities in the management. Model of management of capture fisheries area in Banten Bay can be increase of salary fisherman as much as 25% from first scenario and take care of sustainable fish resources the periode of time 18 years.
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Judul: Invers Drazin dari Matriks Toeplitz Singular
Abstrak: Matriks Toeplitz adalah matriks yang setiap unsur pada diagonal utama bernilai sama dan setiap unsur pada subdiagonal yang bersesuaian dengan diagonal utama juga bernilai sama. Matriks singular adalah matriks yang tidak bisa ditentukan inversnya. Akan tetapi, dapat diupayakan untuk ditentukan inversnya menggunakan invers matriks yang diperumum. Invers Drazin merupakan salah satu jenis invers matriks yang diperumum. Pada karya ilmiah ini ditentukan invers Drazin dari matriks Toeplitz singular dengan menggunakan metode Leverrier Faddeev. Kemudian, ditentukan invers Drazin dari matriks Toeplitz singular yang direpresentasikan sebagai penjumlahan segitiga bawah dan segitiga atas matriks Toeplitz berdasar pada teorema Gohberg dan Semencul., Toeplitz matrix is a matrix in with element on the main diagonal has the same value and on the subdiagonal corresponding to the main diagonal also has the same value. Singular matrix is a matrix that has no inverse. However, it can be attempted to determine the inverse using a generalized inverse matrix. Inverse Drazin is a type of generalized matrix inverse. This paper discussed the inverse Drazin for a singular Toeplitz matrix using the Leverrier Faddeev method. Then, the Drazin inverse of the singular Toeplitz matrix which is represented as a sum of products of lower and upper triangular Toeplitz matrix based on Gohberg and Semencul theorem.
Keyword: inverse Drazine, singular Toeplitz matrix