A hydrogel was prepared by crosslinking aqueous solutions of sulfonated polyacrylamide/chromium triacetate for use in water shut off operations. Gel swelling and the effects of salinity, injection time and flow rate on residual resistance factor (Frr) were investigated. In the presence of electrolytes, gel swelling decreased by about 80%. Results showed that oil permeability increased as inject...

A facility layout problem is concerned with determining the best position of departments, cells, or machines on the plant. An efficient layout contributes to the overall efficiency of operations. It’s been proved that, when system characteristics change, it can cause a significant increase in material handling cost. Consequently, the efficiency of the current layout decreases or is lost and it ...

monthly and annual water and phosphorus mass budgets were set up over the year 2010 for thelake rio verde, brazil. limited data for the water budget was compensated using an interpolation methodwith data water budget data of a nearby reservoir. thus, errors of ca. 1.5% were estimated for the waterbudgets. dominant p mass input terms were inflows from the rivers and direct run off into the reser...

Last week, ITER, the 16 billion international effort aiming to prove the viability of fusion as an energy source, shook off nagging worries that soaring costs and management problems, combined with Europe's economic woes, could lead to the down-sizing or even killing of the experimental reactor. ITER's governing council fi nally approved the project's so-called Baseline, an extensive document o...

Hybridomas: The Making of a Revolution ..................................... The Pope's Science Advisers................................................ Budget Tailors Education to Reagan Pattern................................... DNA Rules Kept to Head Off New Laws ..................................... Briefing: Final Draft of Classification Order; DOD and University Presidents to Meet; Stanfo...

The Dynamic Energy Budget (DEB) theory has become a fundamental tool in modeling the metabolic behaviour of organisms. Its capacity to describe the biological aspect of life alone justifies its applicability in Artificial Life. Aware of this potential, the DEB research group in Instituto Superior Técnico (IST) in Lisbon has joined the videogame company Biodroid Entertainment in the Life Engine ...

Devolution has become a cornerstone of modern public-service management and this tendency is confirmed by several reforms carried out during the 1990s, namely in Europe, in the health sector. In this context, resource allocation decisions depend on multiple budget holders. Our objective is therefore to discuss possible consequences of relaxing the hypothesis of a single budget, which has been w...