Ann Crabb, The Merchant of Prato’s Wife. Marg

The merchant subtour problem

We consider the problem of a travelling merchant that makes money by buying commodities where they are cheap and selling them in other places where he can make a profit. The merchant ships commodities of his own choice in a van of fixed capacity. Given the prices of all the commodities in all of the places, and the cost of driving from one place to another, the problem the merchant faces each d...

The cancer patient’s wife

Mrs. Lee, it's your husband's nurse calling from the hospital. We need to know now whether you'll want us to resuscitate Mr. Lee, just in case. A friend of mine, Mary, received this call yesterday. Her husband Tom had been hospitalized a week earlier , after his platelet count dropped so low that daily outpatient blood transfusions became inadequate and other symptoms of his terminal cancer mad...

Profile of Sabeeha Merchant.

Organic molecules dominate the biological world, yet many of life’s critical molecular reactions depend on metals for catalysis. Sabeeha Merchant, a professor of biochemistry at the University of California, Los Angeles (UCLA), studies how cells keep track of crucial trace nutrients like iron and copper. Her early work on Chlamydomonas reinhardtii, a single-celled alga that, like all plants, pr...

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...

Merchant effects: Neighborhood entrepreneurs, agents of revitalization The case of a merchant association