Judul: Usaha penangkapan udang di kabupaten Cilacap
Abstrak: Usaha penangkapan udang di Kabupaten Cilacap banyak diusahakan dengan menggunakan alat tangkap trannel net dan jaring arad. Banyak faktor yang perlu ditimbangkan dan diperhitungkan dalam bisnis penangkapan udang diantaranya ukuran alat, ukuran kapal dan dya mesin, jumlah ABK, jumlah pembekalan, dan frekuensi setting.
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Judul: Seleksi teknologi penangkapan ikan yang dapat dikembangkan di cilacap jawa tengah
Abstrak: Penelitian bertujuan untuk mengetahui keadaan umum penangkapan ikan di Cilacap, mempelajari teknik penilaian dengan cara skoring dan membuat urutan prioritas unit penangkapan ikan yang dapat dikembangkan di Cilacap berdasarkan analisa aspek biologi, sosial, teknis dan ekonomi. Penelitian dilakukan dengan menggunakan metode survai, data diperoleh dari nelayan dan instansi-instansi yang berkaitan dengan materi penelitian. Analisa dilakukan melalui penilaian aspek biologi, sosial, teknis dan ekonomi dengan cara skoring. Nilai tukar digunakan untuk memperoleh nilai yang mempunyai standar sama, sehingga skoring lebih mudah dilakukan. Potensi lestari sumberdaya perikanan laut di Kabupaten Cilacap diperkirakan sebesar 15.921 ton/tahun. Produksi penangkapan tahun 1986 berjumlah 9.330,5 ton, potensi yang masih dapat dimanfaatkan 6.590,5 ton/tahun atau 41,4%. Kegiatan penangkapan dilakukan dengan menggunakan perahu jukung bermesin, motor outboard serta motor inboard. Alat tangkap yang dioperasikan meliputi jaring insang dasar, jaring insang hanyut, payang, arad, pancing dan trammel net. Produksi hasil penangkapan berupa ikan dan udang, yang merupakan sumber protein hewani untuk konsumsi lokal, dipasarkan ke luar kota dan untuk komoditi ekspor. Produksi ini dihasilkan oleh sebagian penduduk Kabupaten Cilacap, yang bermata pencaharian sebagai nelayan dan merupakan ma- ta pencaharian utamanya. Secara biologi, unit penangkapan yang dapat dikembangkan yaitu payang, jaring insang dasar dan jaring insang hanyut. Dari aspek sosial trammel net jalur II baik untuk dikembangkan. Penilaian aspek teknis, trammel net jalur III baik untuk dikembangkan. Secara ekonomi, trammel net jalur III baik untuk dikembangkan. Penilaian terhadap aspek biologi, sosial, teknis dan ekonomi, menghasilkan urutan prioritas unit-unit penangkapan yang dianalisa yaitu trammel net jalur III urutan prioritas pertama untuk dikembangkan, payang kedua, arad ketiga, trammel net jalur II keempat, jaring insang dasar kelima dan jaring insang hanyut pada urutan prioritas keenam….
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Judul: Simulation of Modified Minimal Model for Glucose and Insulin Mechanism in Type 2 Diabetes and Healthy Humans
Abstrak: Bergman minimal model is Mathematics model which is invented by Richard N. Bergman in 1979. That model consists of three compartments to predict glucose effectiveness (SG) and insulin sensitivity (SI) from the intravenous glucose tolerance test (IVGTT) data in a period of time. A lot of modifications from bergman minimal model have been made with the purpose to increase the accuracy and to handle process complexity in glucose-insulin mechanism system. Minimal model can be used in health to diagnose, to prevent, and to treat diabetes patients. In this research, mathematics model is modified based on the assumption that insulin enters the plasma insulin compartment at a rate proportional to the product of time and the glucose concentration above a basal plasma glucose concentration. If the plasma glucose concentration drops below the basal plasma glucose concentration, so insulin rate which enters the plasma glucose compartment is zero. Insulin is cleaned from the plasma insulin compartment at a rate proportional to the amount of insulin in the plasma insulin compartment. This model is also modified based on the assumption that the insulin decay rate is not always a first order process and function identification from insulin infusion rate. Modified minimal model that is obtained in this research consists of three ordinary diferensial equations. The first and second diferensial equations state that the influence of insulin to speed up glucose absorption, whereas the third diferensial equation states that the influence of glucose to increase insulin secretion. The accuracy of modified minimal model working is tested by comparing the simulation result of modified minimal model with the simulation result by Zheng and Zhao and the experiment result from the previous study which is done by Jiaxu et al. The simulation from that ordinary diferensial equation is accomplished using ode45. In general, modified minimal model is applied to healthy humans and type 2 diabetes patients which is then divided into four conditions based on the amount of exogenous insulin infusion that is applied in MATLAB (Matrix Laboratory). On the first condition, model simulation in healthy humans without giving insulin infusion. That simulation result shows that after giving glucose injection to the body, glucose reaches higher concentration and returns to basal condition within one hour. When giving glucose injection, the signal is sent to pancreas, β cells in islands of langerhans reacts by producing insulin hormone. This condition is signed with the increase of insulin concentration in the body. After that, insulin concentration decreases and forms little peak. Insulin hormone functions to process glucose so that it can be absorbed by body cells. Within one hour insulin concentration will return to basal level because there is no glucose that should be processed anymore. It presents that pancreas responsiveness is excellent, in which β cells are able to secrete enough insulin to keep blood glucose concentration in normal condition. On the second condition, that is model simulation in healthy humans by giving exogenous insulin infusion on the 20th minute for 5 minutes as much as 30 mU kg-1 body weight. Glucose concentration of healthy humans will return quickly to
Keyword: modified minimal model, glucose,, insulin, type 2 diabetes