Judul: Optimasi Distribusi Air Bersih di Asrama TPB IPB
Abstrak: One of the main issues of water distribution process relates to effectiveness of pumps operation. When a pump was turn on there will be a power surge that makes it requires higher power, such that initial power is much greater than normal power. In this manuscript, optimal use of pump for the water distribution at TPB IPB dormitory is discussed. That problem was modeled into an integer linear programming and solved by using LINGO 11.0 software. The model is solved to obtain the pump operation scheduling which minimize energy consumption of electricity.
Keyword: Bogor Agricultural University (IPB), water distribution, pump scheduling, optimization

Judul: Analisis Penyediaan Dan Distribusi Air Bersih Untuk Kampus Dramaga Institut Pertanian Bogor
Abstrak: The purpose of this study is to determine the amount of water required in each unit within the scope of IPB Dramaga campus, to find out the amount of water that can be produced IPB water treatment plant and to create water supply system. This research was conducted from June to October 2010. The result shows that WTP Cihideung-IPB is capable to produce treated water about 137.175 m3/hr, WTP Ciapus-IPB (old) can produce treated water around 44.1 m3/hr, while WTP Ciapus-IPB (new) serving residential lines is capable to produce treated water of 65.95 m3/hr. In this research note also that the amount of water used on average per day during holidays amounted is about 1806.2 m3 (993.4 m3 in Fahutan's tower and the Fapet's tower 812.8 m3) and the amount of water used per day in full activity day amounted is about 1959.77 m3 (1070.93 m3 in the Fahutan's tower and 888.83 m3 in the Fapet's tower). Also note that during holiday peak load amounted is about 137.2 m3 in the Fahutan's tower (09.00 - 10.00) and 98.8 m3 in Fapet's tower (at 7:00 a.m. to 8:00), while at full activities peak load is 132 m3 in the Fahutan's tower (at 8:00 a.m. to 9:00) and 121 m3 in the Fapet's tower (11.00 - 12.00). In the dormitory known path needs per day amounted is about 667.890 m3. From these values it can be concluded that the quantity of treated water production on campus IPB Dramaga is sufficient. However, the problems at the level of a water distribution to the consumer level often lack even absent. In terms of quality, treated water from the installation on campus IPB Dramaga have values that fall into water quality standards
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Judul: Characterizations of low alloy steel sae 4422  plated with chromic acid (Cro3)
Abstrak: Characterizations of low alloy steel SAE 4422 plated with chromic acid (CrOrO3) was use Optical Microscopy (OM), Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), RD),Energy Dispersive Analysis of X-Ray (EDAX), Hardness Test and Roughness Test. Microstructures analysis exhibits cracks and grain boundaries microcracks as a characteristics of chrome metal found at plating metal. Perlite and Ferrite as grains of steel found at base metal with grain boundaries around it. Phase analysis of plating metal appropriate to chrome metal with lattice constant (a) is 2.559 Å and phase analysis of base metal appropriate to iron ferrite with lattice constant (a) is 3.318 Å. Both plating and base metal have cubic system. Chemical analysis of plating metal at surface section exhibits that cracks area have highest value of carbon element compare with grains and grains boundaries area. While chemical analysis of base metal at cross section exhibits that perlite have highest value of carbon element compare with ferrite and grain boundaries. The hardness value of plating metal at surface section and cross section are 753 and 637 VHN. While, the hardness value of base metal and interface area at cross section are 205 and 373 VHN. The roughness value at measurement points of chrome surface for as received sample are 0.445 μm. Observation used Optical Microscopy and Scanning Electron Microscopy exhibits surface irregularities combine to form surface texture of plating metal at surface section.
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