Judul: Analisis Kegagalan Pipa Primary Separator
Abstrak: Hening Pram Pradityo.2012.Failure Analysis on Primary Separator Pipeline. Skripsi. Physics Departmen. MIPA Faculty. Bogor Agricurtular University. Failure Analysis used in order to study what type of corrosion that attack pipeline and causes of corrosion to be occurred. Visual examination done by eyes and digital camera, macroscopic examination by stereo microscope, and microscopic examination by optical microscope and Scanning Electron Microscope (SEM). Elements analysis on pipeline by Optical Emission Spectroscopy (OES) and Energy Dispersive Spectroscopy (EDS). Compound analysis done by XRD. Visual examination result that decimation is occured in pipeline. This decimation is because of corrosion. Macroscopic and micorscopic examination result that type of occured corrosion is general corrosion, pitting corrosion and erosion corrosion. Based on result of elements analysis, elements that form pipeline is not appropriate to American Petroleum Institute (API) standard. Compound analysis show that causes of occurred corrosion are included CO2 and H2S in sour crude oil.
Keyword: 

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: Biology and ecology of the buffalo fly, haematobia exigua de meijere (diptera:muscidae)
Abstrak: The life history of the buffalo fly was observed at room temperature of 27°-29.5°C and at a relative humidity of 48-68 percent. The eggs hatched after 17-22 hours, with an average of 18 hours. First instar larvae measured 1.25 + 0.16 mm long and 0.27 + 0.037 mm wide. reach the second larval stage. It took 6-12 hours to the second instar larvae measured 2.676 +0.187 mm long and 0.353 +0.028 mm wide. The second instar took about 12-24 hours to reach the third larval stage. The third instar measured 6.833 + 0.189 mm long and 0.919 + 0.051 mm wide. It took about 2-3 days for the third instar to become pupae. Duration of the pupal stage was about 5-7 days before the adults emerged. Under laboratory condition, the buffalo fly completed its life cycle in 9.5 to 10.5 days, whereas under field condition it took 9-14 days with an average of 10.5 days. The growth ratio which was based on the measurements of the cephalo-pharyngeal skeleton of each instar was 1.797. The preoviposition period was 8-12 days and mating usually occurred on the 6th or 7th day. The longevity of the male was 29 days, whereas it was 32 days in the female. The range of egg production under laboratory condition was between 20-139 per female fly. The belly and hind legs of the carabao were the most preferred habitat either during cloudy and cool dry or shiny and warm day. When the weather was clear and the carabao was in the shade, the flies tended to be more distributed particularly on the shoulder, dewlap, back and horns. The carabaos had relatively fewer Musca sp. and Stomoxys calcitrans than cattle; never the less carabaos had a higher infestation of buffalo fly than cattle. Oviposition occured either during the day or night but the buffalo flies were more active during the night than in the day time. The effect of various lengths of exposure time of manure in relation to the oviposition was profound. observed, the maximum number of the buffalo flies was occurred when the dung was exposed for 30 minutes. With increasing time of exposure the number and variety of insects also increase. It was evident that Sepsidae and psychodidae were the most dominant insects emerging from the dung. The number of buffalo flies also increased with increasing
Keyword: