3,607 research outputs found
Why We Opposed the Buyout at Weirton Steel
[Excerpt] On March 2, 1982, the National Steel conglomerate announced that it would make no further investments in its Weirton Steel division because a higher rate of profit could be made elsewhere. In the same press release the conglomerate suggested that the 11,000 employees of Weirton Steel buy the mill themselves.
Unlike the steel mills that closed in Youngstown from 1977-1980, the Weirton mill was relatively modern and was making a profit (1% on 1981 sales of $1 billion). Continued operation of the facility made sense
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An exploration of the IGA method for efficient reservoir simulation
Novel numerical methods present exciting opportunities to improve the efficiency of reservoir simulators. Because potentially significant gains to computational speed and
accuracy may be obtained, it is worthwhile explore alternative computational algorithms
for both general and case-by-case application to the discretization of the equations of porous media flow, fluid-structure interaction, and/or production. In the present
work, the fairly new concept of isogeometric analysis (IGA) is evaluated for its suitability
to reservoir simulation via direct comparison with the industry standard finite difference (FD) method and 1st order standard finite element method (SFEM). To this end, two main studies are carried out to observe IGA’s performance with regards to geometrical modeling and ability to capture steep saturation fronts. The first study explores IGA’s ability to model complex reservoir geometries, observing L2 error convergence rates under a variety of refinement schemes. The numerical experimental setup includes an 'S' shaped line sink of varying curvature from which water is produced in a 2D homogenous domain. The accompanying study simplifies the domain to 1D, but adds in multiphase physics that traditionally introduce difficulties associated with modeling of a moving saturation front. Results overall demonstrate promise for the IGA method to be a particularly effective tool in handling geometrically difficult features while also managing typically challenging numerical phenomena.Petroleum and Geosystems Engineerin
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Synthetic utility and reactivity of N-alkynylazoles
textThe chemistry of N-alkynylazoles is a newly emerging area of chemistry with particular interest in heterocycle synthesis. Synthetic preparations of this class of molecule have shown an increasing presence in literature, however, the synthetic utility of this class of molecule remains underexplored. Herein, it is shown that N-alkynlazoles are a versatile synthetic intermediate and may have utility as covalent modifiers of cysteine residues in polypeptides.Pharmaceutical Science
How Bad a Deal Is Weirton Steel?
[Excerpt] Your issue on worker ownership was excellent. It should be a very useful document for many union people. I would like to raise two points, however
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