Judul: Analisis Karakteristik Aliran dalam Boks Bagi pada Sistem Irigasi Perpipaan
Abstrak: Irrigation with closed distribution system using pipes is possible to sedimentation in the pipes, therefore is necessary to design piping system so sedimentation in the pipes can be as minimal as possible. Division box in the tertiary irrigation network is very important in addition to divide discharge proportional to the field also as a sediment control that sedimentation in the pipe to a minimum. The main objective of this research is to design division box in the PVC pipe for irrigated paddy field, so that the results will be: (1) Flow characteristics Analysis in the division box for the most optimal pipeline so that the sedimentation in the pipe to a minimum; (2) Simulation to analyze the flow of sediment and flow characteristics in the piping irrigated using surface water as a source of irrigation water, (3) the relation between the design parameters of division box with the flow based on the diameter of the inlet pipe and outlet pipes. Durst (2008 ) explains that the similarity theory of dimensional analysis is that if the differential equations that describe the flow of the problem is unknown . It is important that dimensional analysis can also be used when the physical relation between the amount of which is not known at all . Division box built in the tertiary canals and the quarter in order to divide the irrigation water to all tertiary and quarter. Models of division box was made to simulate the flow in PVC pipe and division box in the same pipeline so that the quaternary as happened in the real situation on the field . In this research made the model of division box for irrigation piping systems with the circular cross section. Analysis of flow characteristics in the division box using the method of dimensional analysis. At the phase of dimensional analysis to determine the flow characteristics in PVC pipes and division box with choosing the basic unit of the relation between derivative quantities. The graphs of the data model and the simulation results in the field validation results that can be used as a reference in designing the division box in the irrigation network that uses PVC pipe for piping irrigated. Results of this graph can be used to determine the design of division box on tertiary irrigation network optimized so as to minimize the occurrence of sedimentation in the PVC pipe.
Keyword: division box, pipeline irrigation system, flow characteristics, dimensional analysis

Judul: Perencanaan Sistem Jaringan Perpipaan Bertekanan untuk Irigasi Padi Sawah di Balai Besar Penelitian Tanaman Padi (Subang, Jawa Barat).
Abstrak: Indonesian Center for Rice Research (ICRR) is a research institute that need precision and high accuracy to strengthen the analysis of research at the institute. One of those research is water balance analysis that need infrastructure such as irrigation. The objective of this research was to design burried pressure pipeline network system for paddy irrigation which starts from the determination of the diameter to the structural analysis. Diameter determination is done by combining the Bernoulli and Darcy-Colebrook-White equation, whereas the structure analysis following the standard of American Water Works Association (AWWA) M41 for pipes made of ductile iron. The results of design indicated that the water from the inlet could not flow by gravity, thus requiring the pump with head difference between the inlet to the outlet was 2.73 m. The main pipe diameters were respectively 36, 30, 24, and 18 in the pipeline while the branch was uniformed with 8 in. Hydraulic gradient along the flow was positive and exceeded the minimum operating pressure at each node, making sure the water can flow throughout both the main and branch pipes. Results of the analysis of the structure of the pipeline due to external loading indicated that the total pressure was still below the maximum bending stress. Total pressure also remained under maximum pressure deflection. Therefore, the pipe can withstand a design load and secure from buckling factor and ring deflection.
Keyword: ductile iron, hydraulic gradient, Indonesian Center for Rice Research, irrigation, pressurized pipe

Judul: Penapisan Hepadnavirus Secara Serologik Dan Molekuler Pada Monyet Ekor Panjang (Macaca Fascicularis) Di Habitat Ex-Situ
Abstrak: Penemuan infeksi virus hepatitis B (VHB) monyet ekor panjang (Macaca fascicularis) di Pulau Mauritius pada tahun 2013 merupakan temuan baru yang menunjukan bahwa penyakit ini dapat menginfeksi jenis satwa primata dari famili Cercopithecidae. Temuan tersebut hanya dilaporkan pada M. fascicularis yang berada di benua Afrika, sehingga menjadi alasan dilakukannya investigasi pada M. fascicularis asal Indonesia. Untuk mendapatkan gambaran keadaan tersebut, sampel darah M. fascicularis diambil dari berbagai lokasi habitat ex-situ. Uji penapisan terhadap antigen permukaan virus hepatitis B (Hepatitis B surface antigen, HBsAg) dilakukan pada 95 sampel plasma dan serum M. fascicularis yang berasal dari penangkaran, pusat penyelamatan satwa, dan topeng monyet. Upaya pemeriksaan DNA VHB dilakukan pada sampel yang menunjukan hasil seropositif terhadap HBsAg. Uji penapisan menunjukan bahwa sebanyak 11 dari 95 (11.6%) sampel reaktif terhadap HBsAg. Antigen permukaan virus hepatitis B lebih banyak ditemukan pada monyet di pusat penyelamatan satwa dan topeng monyet (55%) dibandingkan dengan satwa penangkaran (45%). Hasil seropositif HBsAg pada sampel M. fascicularis yang diperiksa dengan teknik ELISA menggunakan kit HBsAg manusia mengindikasikan adanya kemiripan protein antigen permukaan VHB manusia dengan yang ditemukan pada M. fascicularis, karena antibodi monoklonal yang digunakan dalam uji ELISA pada penelitian ini bersifat spesifik mengikat HBsAg manusia. Meskipun uji PCR terhadap sampel tersebut tidak menunjukkan adanya DNA VHB, hasil seropositif HBsAg mengindikasikan bahwa M. fascicularis dapat terinfeksi VHB atau virus yang mirip VHB secara alami.
Keyword: virus hepatitis B, monyet ekor panjang, habitat ex-situ