Judul: Kontribusi terumbu buatan (Reef Ball) dalam pengembangan minawisata bahari di Wilayah Pesisir Ratatotok Sulawesi Utara
Abstrak: Impacts of artificial reefs (reef ball) and its potential for the development of fisheries and marine tourism is presented in this paper. The study was conducted to analyze the ecological and economic impacts of artificial reefs, to assess the suitability of the area for the development of marine tourism and fisheries, and to formulate integrated management strategies of artificial reef region, in Ratatotok coastal areas, North Sulawesi, from 2009 to 2011. The results showed that artificial reefs presence for about 11 years has affected the ecological and economic coral reef ecosystems. It is showed that by using Scenic Beauty Estimation (SBE) method the location with coral reef has higher visual level preference than the locations without the artificial reef. Regional conformity assessment results showed that the location is suitable as marine tourism area and small-scale coral reefs fisheries. Moreover, integrated management strategies appropriate to support the development of marine tourism and fisheries in the region and boost the economy of coastal communities while still maintaining the sustainability of coral reef ecosystems.
Keyword: 

Judul: Ekostruktur Ikan Terumbu pada Ekosistem Terumbu Buatan (Reef Ball) di Teluk Benete, Sumbawa, Nusa Tenggara Barat
Abstrak: Ikan terumbu adalah kumpulan individu ikan yang hidup dan keberadaannya erat kaitannya dengan kondisi terumbu karang. Salah satu alternatif untuk merehabilitasi terumbu karang yang rusak adalah terumbu buatan dengan metode reef ball. Penelitian ini bertujuan mengetahui struktur komunitas ikan terumbu di ekosistem terumbu buatan (reef ball) dan terumbu karang alami di Teluk Benete. Survei dilakukan pada Juni – Agustus 2016 di tiga stasiun (HA1, HA2, dan RB) menggunakan teknik underwater visual census (UVC) pada transek 2 x 30 meter. Diperoleh 110 spesies ikan terumbu dari 26 famili dan kelimpahan ikan di terumbu buatan (RB) lebih tinggi, namun biomassanya lebih rendah dibandingkan terumbu alami (HA1 dan HA2). Komposisi ikan mayor, indikator, dan target secara berturut-turut mencapai 83.59%, 5.93%, dan 10.47% dari total. Nilai indeks keanekaragaman, keseragaman, dan dominasi adalah 2.50 – 3.60, 0.69 – 0.95, dan 0.06 – 0.20 yang menunjukkan komunitas ikan terumbu tergolong stabil di seluruh stasiun pengamatan. Hasil tersebut menunjukkan keberhasilan fungsi reef ball sebagai alternatif habitat bagi ikan di Teluk Benete.
Keyword: biomassa, ikan terumbu, kelimpahan, Teluk Benete, terumbu buatan

Judul: Pemodelan Dinamika Glukosa dengan Persamaan Hovorka menggunakan Metode ODE 45 untuk Kasus Diabetes Tipe 1.
Abstrak: Type 1 Diabetes is a case where beta cell in pancreas cannot produce insulin properly. On a type 1 diabetes case, some insulin had to be added into the bloodstream. This simulation used Hovorka equations and ODE 45 methods in MATLAB. To know the amount of dosage for insulin that a type 1 diabetes case need, also how the kinematics and dynamics look like for the glucose rate in the bloodstream can be done by using this simulation. Some variation on the amount of insulin, injection time and weight had been done to get the optimum result of glucose rate in the bloodstream. The result from this simulation is a 70 kg weigh need insulin injection in the morning for about 2 dL, and 21 dL each for afternoon and night times, all of injection time is an hour after eating.
Keyword: ODE 45, Hovorka method, Insulin, Type 1 Diabetes, Blood glucose