The effects of laser irradiation on the optical properties of GaAsN and GaInNAs quantum wells are studied in detail. The laser treatment is found to affect GaAsN quantum wells quite similarly to thermal annealing. The most intense photoluminescence is obtained by utilizing both thermal and laser treatments. In quaternary GaInNAs, the effects of thermal annealing and laser treatment differ from ...

Spira [36] showed that any Boolean formula of size s can be simulated in depth O(log s). We generalize Spira’s theorem and show that any Boolean circuit of size s with segregators of size f(s) can be simulated in depth O(f(s) log s). If the segregator size is at least sε for some constant ε > 0, then we can obtain a simulation of depth O(f(s)). This improves and generalizes a simulation of poly...

In industry, the porosity of petrochemical reservoirs is measured frequently by coring and is an important property when trying to determine if a site is appropriate for drilling. Porosity can also be used in waste water treatment in order to determine if a material is ideal for water purification in industrial or residential applications. The purpose of this experiment was to simulate a oil re...

Homogenisation of consolidation and compressible fluid flow in dual-porosity media has highlighted the existence of three characteristic macroscopic behaviours. These three behaviours are, namely, a dual-porosity description which includes memory effects, a single-porosity description with which the micro-porosity is simply ignored, and an intermediate behaviour which we refer as behaviour with...

Ceramic coated carbon steel coupons were corrosion tested in water with dissolved salts to simulate exposure to evaporation concentrated groundwater in an underground nuclear repository. Metallography revealed no corrosion at the ceramic metal interface of dense coatings, even though electrical measurements demonstrated that the coatings were slightly porous. Experimental results and a model to...

An integrated subsurface study has been performed for a large and mature field at the Bekasap Formation in Central Sumatra Basin. The sand represents an undeveloped reservoir because of its heterogeneity. There are five reservoirs (BK1, BK2, BK3, BK4, BK5) from Formation, which each zone or layer bounded by flooding surface. Each particular characterization based on petrophysical properties tha...

Porosity has been frequently observed in solidified, deep penetration pulsed laser welds. Porosity is detrimental to weld quality. Our previous study shows that porosity formation in laser welding is associated with the weld pool dynamics, keyhole collapse, and solidification processes. The objective of this paper is to use mathematical models to systematically investigate the transport phenome...