Judul: Penentuan Koefisien Tekanan untuk Perancangan Rumah Tanaman Tipe Modified Arch.
Abstrak: Perancangan rumah tanaman yang baik untuk daerah beriklim tropika sangat krusial karena suhu udara yang tinggi akibat radiasi matahari pada siang hari. Laju pertukaran udara harus cukup untuk memastikan temperatur udara di dalam rumah tanaman tidak terlalu tinggi dari suhu optimum untuk tanaman tanpa diperlukan ventilasi mekanis. Desain greenhouse tipe modified arch memungkinkan terjadinya ventilasi alamiah yang lebih baik. Tujuan penelitian ini adalah menentukan koefisien tekanan (Cp) untuk perancangan rumah tanaman tipe modified arch dengan sistem eksperimen terowongan angin, melakukan perhitungan coefficient of discharge (Cd) dalam kesetimbangan laju aliran ventilasi udara, dan menghitung kecepatan angin kritis yang dapat merusak rumah tanaman. Model rumah tanaman yang diujikan memiliki perbandingan 1:50 dengan ukuran aslinya. Nilai Cp pada ventilasi dinding windward bernilai positif dan pada ventilasi dinding leeward bernilai negatif. Nilai Cp pada atap lebih bervariasi dibandingkan pada dinding. Nilai Cd untuk zona ventilasi dinding kanan dan kiri pada arah sudut angin 0o dan 180o berturut turut sebesar 0,043 dan 0,089. Kecepatan minimum yang dapat merusak rumah tanaman untuk sudut 0o, 30o, 45o, 70o, 90o, dan 180o berturut-turut adalah 18,73 m/s, 19,98 m/s, 20,01 m/s, 17,30 m/s, dan 23,94 m/s.
Keyword: coefficient of discharge, kecepatan angin kritis, koefisien tekanan, rumah tanaman, terowongan angin

Judul: Simulasi distribusi suhu dan pola aliran udara dalam rumah tanaman tipe modified arch menggunakan computational fluid dynamics
Abstrak: In this research, the effect of wind speed on the natural ventilation of a modified arch greenhouse was analysed by computational fluid dynamics (CFD), using the commercial software SolidWorks of 2010. The objectives of this research were to understand the natural ventilation on the greenhouse and develop a simulation of temperature distribution and the airflow pattern on the modified arch greenhouse. The experiment was carried out in a modified arch greenhouse equipped with both top and side ventilations. Climate data and greenhouse characteristics were used as inputs and boundary condition to develop a simulation model. Two-dimensional simulation in a steady state with the condition of no wind speed (0.0 m/s), moderate wind speed (0.5 and 0.6 m/s) and high wind speed (1.8 m/s) were carried out. The wind speed through the insect-proof screen was simulated as a flow through porous media. The CFD model has succeded in predicting the temperature distribution and airflow pattern of the greenhouse. The result of the model showed that the greenhouse has a gradient temperature vertically and the natural ventilation works effectively. It is proved that a small error percentage of difference temperatures between the simulation result and the observed data (less than 8%) was obtained. The coefficient variation was also small (0.12), with the coefficient of uniformity of 89.76%.
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Judul: Studi Kasus Liver Neoplasia pada Anjing Shih Tzu
Abstrak: Liver neoplasia is the excessive and uncontrolled replication of hepatocytes that forms nodules visible in ultrasonography. The purpose of this study is to study and discuss the characteristic, diagnosis and treatment of liver neoplasm through the interpretation of ultrasonography and hematology in a Shih Tzu dog. Ultrasonography is conducted with a Chison Q8 ultrasound machine with a 5 to 7 MHz frequency convex probe on lateral recumbency. The blood cells, liver enzymes and nodules sizes were the main parameters in this study. The results in the period of three years from 2021 to 2023 were interpreted and supported with secondary data sources. The Shih Tzu dog is 14 years old in the year 2023 with a body weight of 5.21kg. No obvious clinical signs were observed during previous examinations. However, lethargy, vomiting and anorexia were recorded in its latest examination. Thrombocytosis, granulocytosis, high liver enzymes and hypoglycemia, which are some of the neoplastic clinical manifestations were also presented by this patient. Besides, liver neoplasm, spleen neoplasm and biliary sludge were the sonogram findings of this patient. The liver and spleen neoplasm was observed stable, while the biliary sludge volume fluctuated. The treatment strategy recorded is Ondansetron, Samylin®, Ornipural and Ursodeoxycholic acid.
Keyword: Blood biochemistry profile, Hematology, Liver Neoplasia, Shih Tzu, Ultrasonography