This paper presents a model for strategically locating drop-lots on a supply chain distribution network. The problem is modelled as a set covering location problem with the addition of a set of minimum-distance-away constraints. The effect of these constraints on the solution space is dramatic, reducing the problem size significantly. It is also proposed that the use of drop-lots in a supply chain can have beneficial quality of life effects for the truck drivers in such a system by allowing them more home time. A real-life example problem from the Midwest is used to validate the model and some computational experience is also reported.
Case Study - Groundwater: Locating Water Wells
South Sudan: 4000 L/min water wellDate: February 25, 2015Site: Yeri Mozo Village, South Sudan, AfricaEquipment: SuperStingR8 WiFi, SwitchBox56 and passive cables spaced at 5m.Software: EarthImager2D with a finite element inversion model of dipole-dipole array data.Results: Resistivity imaging successfully located a very high production potable water well with 4000 liter/hour static yield.
Simultaneous nitrification, denitrification and phosphorus removal (SNDPR) in a full-scale water ...
The combination of simultaneous nitrification-denitrification (SND) with enhanced biological phosphorus removal (EBPR) provides a more efficient and economically viable option for nutrient removal from municipal wastewater compared to conventional two-step nitrification-denitrification. This study analyzed the nutrients (N and P) profiles in a full-scale municipal wastewater reclamation plant (WRP) located in the tropical region, in which more than 90% of nitrogen was removed. Interestingly, average SND efficiency...
Antibiotics in groundwater under locations with high livestock density in Germany
Antibiotics are deployed in large quantities both in human and in veterinary medicine. Studies show that antibiotic residues occur in the environment (e.g. soil and surface waters). In some cases they were also detected in ground and drinking water. However, the degree of groundwater pollution by antibiotic residues from livestock farming is unknown. Therefore, the federal environment agency (UBA) supported a project that aimed to investigate near-surface groundwater samples in regions of high livestock density...
Locating Leaks for Cooling Water Systems
This article illustrates how to locate leaks on cooling water systems in loud, industrial environments like Nuclear or Coal power generating plants without digging or putting anything inside the pipeline. Infrared-Energy Pattern Analysis (IR-EPA) works on all pipeline sizes and all pipeline materials because it identifies the water outside the pipeline instead of listening for leak noises like traditional leak detection techniques. IR-EPA is safe due to its passive nature and only monitors the ground surface for...
Typical Sensor Location Considerations
The sensor mounting location within a space may be dependent on many variables. There are no specific formulas since each application will have it’s own determining factors and priorities. These include, but are not limited to: source of gas: Is the source a combustion exhaust from a vehicle or furnace or a vapour from a tank spill, pipe leak, or faulty valve? density of gas: some gases are light than air and will rise, others are heavier and will migrate toward to the floor or into a pit use of the...