Judul: Efektivitas Pengendalian Penyakit Bakterial pada Pembesaran Ikan Lele Clarias sp. dengan Pakan yang Mengandung Bawang Putih dan Meniran
Abstrak: This study aimed to determine the effectiveness of the use of feed containing Allium sativum and Phyllanthus niruri to control bacterial diseases in catfish grow out. Catfish used in this experiment was as length as 7.27 ± 0.34 cm and as body weight as 0.51 ± 3.53 g. Catfish was maintained in plastic ponds with size of 2 m × 1 m × 0.5 m as many as 12 pieces. The treatments applied were Control (-) (without experimental feeding and without water changing), Control (+) (without experimental feeding and with water changing), Prevention (feeding with Allium sativum dose 1.4% and Phyllanthus niruri 0.7% before water changing for 21 days), medical treatment (feeding with Allium sativum dose 2.8% and Phyllanthus niruri 1.4% after water changing for 14 days). The results demonstrated that the survival in medical treatment reached 95.38% ± 7.43%, that was significantly different from control (+) treatment (P ≤ 0.1). Allium sativum and Phyllanthus niruri treatment with the dose of 2.8% and 1.4% were effective for bacterial disease control in catfish Clarias sp. grow out that showed the highest survival of 95.38%.
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Judul: Efektivitas pengendalian penyakit bakterial pada pembesaran ikan lele Clarias sp. dengan pakan yang mengandung bawang putih dan meniran
Abstrak: Penelitian ini bertujuan untuk menentukan efektivitas penggunaan pakan yang mengandung bawang putih dan meniran untuk pengendalian penyakit bakterial pada pembesaran ikan lele. Ikan lele yang digunakan memiliki panjang 7,27 ± 0,34 cm dan bobot tubuh 3,53 ± 0,51 g. Wadah yang digunakan adalah bak terpal yang berukuran 2 m x 1 m x 0,5 m sebanyak 12 buah. Perlakuan yang diujikan adalah Kontrol (-) (tanpa pemberian pakan uji dan tanpa pergantian sumber air), Kontrol (+) (tanpa pemberian pakan uji dan dengan pergantian sumber air), Pencegahan (pemberian pakan uji dengan dosis bawang putih 1,4% dan meniran 0,7% sebelum pergantian sumber air selama 21 hari), Pengobatan (pemberian pakan uji dengan dosis bawang putih 2,8% dan meniran 1,4% setelah pergantian sumber air selama 14 hari). Hasil penelitian menunjukkan kelangsungan hidup perlakuan pengobatan 95,38 ± 4,24% berbeda nyata dengan perlakuan Kontrol (+) (P≤0,1). Perlakuan bawang putih 2,8% dan meniran 1,4% efektif untuk pengendalian penyakit bakterial pada pembesaran ikan lele Clarias sp. dengan memberikan kelangsungan hidup tertinggi yakni 95,38%.
Keyword: Bacterial disease, Catfish, Grow out, Alium sativum, Phyllantus niruri

Judul: Utilization of terra/MODIS L1B data for analysis of horizontal wind profile in the troposphere
Abstrak: This study was concerned with horizontal wind derived from data collected with the Moderate-resolution Imaging Spectroradiometer (MODIS) on board the NASA’s Earth Observation System (EOS)-Terra satellite. The aim of this study is to develop a method for the estimation of horizontal wind movement in the troposphere based on Navier-Stokes equation. The method was applied to a calibrated and geolocated Terra/MODIS L1B 1 km data set. The data inputs to estimate surface temperature are retrieved from TIR (Thermal Infrared) bands 31 (10.780 μm to 11.280 μm) and 32 (11.770 μm to 12.270 μm). The obtained surface temperatures were later used to approximate geopotential height on a constant-pressure surface by using the modified Poisson equation. The main assumptions used are the hydrostatic equilibrium, ideal gas law, constant lapse rate and constant acceleration of gravity. Based on the distribution of geopotential height, the pressure gradient force is measured by the gradient of geopotential on an isobaric coordinate to present the horizontal wind profile. For certain topographic areas especially in the mountain ranges, there was a disadvantage of using pressure as a vertical coordinate which lead to inaccuracy. In spite of that, Terra/MODIS L1B data with 1 km spatial resolution can be used to estimate the horizontal wind movement in the troposphere.
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