Judul: Desain Tata Ruang Bangunan Eco-house Menggunakan Computational Fluid Dynamics (CFD) pada Iklim Tropis
Abstrak: Eco-house is the application of ecological design where its layout considering the thermal problems in a room, the use of energy and sustainable resources. The objectives of this research is to design the Eco-house’s layout which can be inhabited by farmers and focused on aspects of the thermal comfort in tropics. Eco-house was designed by using Computational Fluid Dynamics (CFD) method. The design process is started by the validation of CFD simulation of Laboratory of Environmental Engineering of Biosystem which is the accuracy of simulation result is tested and validated. The same design process of CFD simulation is applied to the process of designing Eco-house's layout. The designs of Eco-house's layout utilize natural ventilations sistem with the design of the wind and the combination of wind and thermal effects. Design of ventilation combination of results of simulation comfort are qualified with the equivalent temperature distribution of 24.65 oC, wind velocity of 0.5-0.8 m/s and relative humidity of 65%. The additional of roof vents and designing the building perpendicular to the direction of wind supports the thermal comforts requirement.
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Judul: Simulasi distribusi suhu dan kelembapan udara untuk pengembangan desain rumah tanaman di daerah tropika basah
Abstrak: Greenhouse design for the humid tropical regions is still a challenge. Microclimate analysis of a standard peak type greenhouse has been conducted using Computational Fluid Dynamics (CFD). The objectives of this research were to simulate temperature, humidity, and airflow distribution by using CFD, and to investigate the greenhouse natural ventilation performance on zero and low windspeed conditions. Climate data and greenhouse characteristics were used as inputs for the simulation. The CFD model predicted temperature, relative humidity, and airflow distributions inside the greenhouse. Visual representations of the three parameters distributions in the greenhouse were created by isothermal line. The simulation produced realistic approximations of the dynamic behavior of greenhouse environments. Results of this study showed the importance of roof vents and sidewalls openings for efficient thermally driven ventilation
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Judul: Perbedaan antara lymphoid leukose (LL) dan penyakit marek (PM) ditinjau dari sudut kausa, patogenesa, perubahan paska mati dan histopatologik
Abstrak: LL adalah salah satu penyakit Leukosis/Sarcoma group yang paling sering ditemukan dan merupakan satu-satunya bentuk leukosis ekstra vaskuler unggas yang bisa dipindahkan. PM didefinisikan sebagai penyakit proliferasi limfo- id pada unggas. LL dan PM sulit dibedakan karena manifestasi penyakitnya hampir serupa. LL dan PM tergolong dalam golongan penyakit yang penting, karena secara ekonomis kedua penyakit tersebut dapat menimbulkan kerugian yang besar. Penyebab LL adalah virus RNA golongan myxovirus sub group A dan B, umumnya menyerang ayam dewasa kelamin dengan pola penyebaran utama secara transovarial. PM disebabkan oleh virus DNA golongan Herpes virus, menyerang ayam-ayam yang lebih muda dengan pola penyebaran penyakit secara horizontal. Perubahan pasca mati dari LL terutama ditemukan pada hati, limpa dan BF. Pada PM kelainan dapat ditemukan pada sistem syaraf, alat tubuh visceral, otot, kulit dan mata. Gambaran histopatologik dari tumor LL ternyata lebih seragam dan terdiri dari sel-sel limfoblast. Sedangkan pada PM, susunan selulernya terdiri dari sel-sel limfoblast, sel limfosit kecil, sedang dan besar, sel retikulum dan sel PM. Dengan memperhatikan aspek kausa, patogenesa, perubahan pasca mati dan histopatologik, maka diagnosa penya- kit secara cepat dan tepat akan terlaksana.
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