The 1981 Federation of Labour Conference

11th conference of the arab federation for librarians and information scientists (cairo: 12-26 aug, 2000)

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Conference on phthalates. June 9-11, 1981 Washington, DC.

The use of plastics and plastic-containing products is a reality of modern life that has transformed both the home and work environments. In addition to the polymerized molecules that form the matrix of the plastic, however, other chemicals (adjuvants) are commonly incorporated into plastic products to impart specific use or performance characteristics such as combustion resistance, color enhan...

A problem of Stanley from the 1981 Banff Conference on Ordered Sets

Let P be a naturally labelled, ranked (graded) poset of rank r and cardinality n. Let Hk be the set of linear extensions of P with k descents. An explicit bijection between Hk and Hn−1−r−k is constructed using the involution principle (0 k n−1− r). A problem of Richard P. Stanley from 1981 is thereby solved.  2004 Elsevier Inc. All rights reserved.

the effect of taftan pozzolan on the compressive strength of concrete in the environmental conditions of oman sea (chabahar port)

cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...

The Effects Of Afghan Immigrants On The Iranian Labour Market