Judul: Tingkah Laku dan Respons Fisiologis Sapi Peranakan Ongole Betina Pada Sistem Semi Ekstensif di Situbolang
Abstrak: Sapi memiliki tingkah laku dan respons fisiologis yang berbeda pada setiap koloni. Penelitian ini bertujuan mengevaluasi perbedaan tingkah laku dan respons fisiologis sapi peranakan ongole betina pada jumlah koloni yang berbeda pada sistem pemeliharaan semi ekstensif. Penelitian ini menggunakan 8 ekor sapi indukan peranakan ongole betina yang ditempatkan masing-masing 2 ekor pada 4 kandang koloni berbeda (2 koloni>23 ekor, 2 koloni<18 ekor). Metode analisis yang digunakan yaitu analisis uji beda Mann-Whitney dan uji-T pada selang kepercayaan 95%. Hasil penelitian menunjukan persentase koloni>23 ekor melakukan tingkah laku grazing sebesar 25,12±6,57%, tingkah laku browsing sebesar 4,65±2,07%, tingkah laku minum sebesar 5,60±1,45%, tingkah laku resting sebesar 25,24±3,05%, dan tingkah laku lokomosi sebesar 39,37±5,65%. Koloni<18 ekor melakukan tingkah laku grazing sebesar 23,07±4,27%, tingkah laku browsing sebesar 2,58±3,03%, tingkah laku minum sebesar 6,28±1,66%, tingkah laku resting sebesar 25,71±6,07%, dan tingkah laku lokomosi sebesar 42,33±4,46%. Tingkah laku dan respons fisiologis sapi peranakan ongole betina pada koloni berbeda yang dipelihara secara semi ekstensif adalah sama. Kata kunci:koloni, respons fisiologis, sapi betina, tingkah laku.
Keyword: physiological response, behavior, colony, cow

Judul: Physiological Response, Behavior and Performance of Ongole Grade and Local Crossbreed Cattle on Short Distance Transportation
Abstrak: Transportasi merupakan elemen penting dalam rantai industri sapi pedaging. Penelitian ini bertujuan mengevaluasi respon fisiologis, tingkah laku dan performa Sapi Peranakan Ongole dan Sapi Silangan Lokal selama rekodisi pada proses transportasi jarak dekat. Penelitian ini menggunakan Sapi Peranakan Ongole (PO) dan Silangan Lokal Jantan masing-masing 8 ekor dengan umur I1-I2 (18-30 bulan). Rataan bobot badan Sapi Peranakan Ongole dan Silangan Lokal berturut-turut adalah 291,5±23,5 kg dan 289,0±26,4 kg. Peubah yang diamati meliputi kondisi mikroklimat lingkungan, respon fisiologis, tingkah laku dan performa ternak. Hasil penelitian menunjukkan bahwa berdasarkan nilai THI, sapi mengalami stres panas sedang selama transportasi dan stres panas ringan selama rekondisi. Respon fisiologis dan penyusutan bobot badan Sapi Peranakan Ongole dan Silangan Lokal adalah sama. Tingkah laku dominan saat proses pemuatan (loading) dan penurunan (unloading) adalah adalah tergelincir yaitu masing-masing sebesar 30,8% dan 32,7%. Rataan penyusutan bobot badan Sapi Peranakan Ongole 7,0±4,0 kg (2,5%) dan Sapi Silangan Lokal 9,3±5,3 kg (3,1%). Selanjutnya lama rekondisi Sapi Peranakan Ongole dan Silangan Lokal sama yaitu selama 10 hari., Transportation is an important element in beef industry. This study aims to evaluate the physiological response, behavior and performance during recondition period of Ongole and Local Crosbreed Cattle in short distance transportation. This study used 8 Ongole Crossbreed and 8 Local Crossbreed Cattle bull with average age of I1-I2 (18-30 months). The average body weight of Ongole and Local Crossbreed Cattle were 291,5±23,5 kg and 289,0±26,3 kg respectively. The parameters observed were environmental microclimate conditions, physiological responses, behavior and performance of cattle. The results of THI showed that cattle was on medium heat stress during transportation and mild heat stress during recovery time. Physiological response and body weight loss of Ongole grade and Local Crossbreed Cattle were similar. The dominant behavior during loading and unloading process was slips, which were 30,8% and 32,7% respectively. Average body weight loss of Ongole grade and local crosbreed were 7,0±6,8 kg (2,5%) and 9,3±5,3 kg (3,1%). Furthermore, length of recovery time of Ongole and Local Crosbreed Cattle was similar for ten days.
Keyword: respon fisiologis, sapi peranakan ongole, sapi silangan lokal, tingkah laku, transportasi

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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