Judul: Analisis pengembangan perikanan pukat cincin cakalang (Katsuwonus pelamis) di perairan utara Nangroe Aceh Darussalam
Abstrak: Perairan utara Nangroe Aceh Darussalam berhubungan Iangsung dengan Samudera Hindia dan Selat Malaka, merupakan perairan yang sangat potensial akan sumberdaya ikan (terutama ikan petagis besar). Penelitian ini dilaksanakan mulai bulan Maret 2001 sampai Juni 2001 di Nangroe Aceh Darussalam dengan tujuan untuk menenaikan strategi pengembangan perikanan pukat cincin berdasarkan faktor-faktor teknis yang mempengaruhi produksi perikanan pukat cincin cakalang dan kelayakan usaha perikanan pukat cincin cakalang di perairan utara Nangroe Aceh Darussalam. Penelitian ini mengkaji 47 unit dari 109 unit armada pukat cincin yang ada di perairan utara Nangroe Aceh Darussalam.
Keyword: 

Judul: Pemetaan Daerah Penangkapan Ikan Cakalang (Katsuwonus pelamis) Dan Tongkol (Euthynnus affinis) Di Perairan Utara Nanggroe Aceh Darussalam
Abstrak: Perairan Utara Nanggroe Aceh Darussalam berada di sebelah ujung barat Pulau Sumatera memiliki potensi perikanan laut yang cukup besar terutama kelompok ikan yang bernilai ekonomis penting. Produksi perikanan laut Provinsi Nanggroe Aceh Darussalam pada tahun 2004 tercatat 102.555 ton, dari produksi tersebut terdapat produksi cakalang dan tongkol sebesar 15.862 ton. Dari data produksi ikan cakalang dan tongkol di atas menunjukkan bahwa data hasil tangkapan ikan cakalang di perairan Utara Nanggroe Aceh Darussalam sebesar 793.462 kg dan tongkol sebesar 452.500 kg. Salah satu permasalahan utama yang dihadapi dalam kegiatan eksploitasi sumberdaya perikanan di perairan Utara Nanggroe Aceh Darussalam adalah ketidakpastian posisi dan sulitnya menentukan daerah penangkapan (fishing ground), karena masih terbatasnya penelitian-penelitian parameter oseanografi (SPL, dan klorofil-a) sehingga distribusi dan kondisi indikator oseanografi di daerah ini belum banyak diketahui, sehingga menyebabkan hasil tangkapan ikan belum optimal. Salah satu faktor penentu keberhasilan dalam usaha penangkapan ikan adalah ketepatan dalam menentukan suatu daerah penangkapan ikan (DPI) yang layak untuk dapat dilakukan suatu operasi penangkapan ikan. Pada umumnya nelayan membutuhkan waktu yang cukup lama dalam menemukan schooling ikan. Dengan cara ini trip operasi penangkapan ikan menjadi lebih lama dan biaya operasional akan semakin tinggi. Parameter oseanografi merupakan faktor yang sangat berpengaruh terhadap produktivitas hasil tangkapan ikan terutama ikan cakalang dan tongkol, seperti SPL dan klorofil-a.
Keyword: 

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