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: Analysis on Ecohouse’s space arrangement and airflow in rural area.
Abstrak: This paper explores the potential of temperature distribution using ventilation and natural convection in a Eco-house’s space arrangement and air flow in rural area by natural air cooling system for a construction designs as an illustrating Eco-House in Indonesia. The characteristics of the construction are analyzed in terms of heat and mass transfer and also air circulation by the Computational Fluid Dynamic method and practice. Based on the thermal comfort requirements of the Indonesian National Standard (SNI), the study has found that it is possible to use natural ventilation to create a thermally comfortable indoor environment in Eco-houses. This study also develops comprehensive design guidelines for natural ventilation at both the site planning and individual compartment house levels, using the specific materials. Finally by the simple geometry and calculation following the technical design temperature distribution in any point inside Eco-house will be predictable.
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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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