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The right to be forgotten
A businessman fighting for the "right to be forgotten" has won a UK High Court action against G...

Student loan repayment threshold rises
Former students will be able to earn more before they have to start paying back their tuition f...

Forest Harvest Scheduling
Forest Harvest Scheduling with Endogenous Road Costs

Facebook revamp
Details of the Facebook changes were announced in a blog.

Women in Mathematics Days 2018
Women in Mathematics Days 2018


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A window on the world of O.R.?
The “invisibility cloak” of science fiction is now fact, albeit with limitations. O.R. could claim to have had the power of invisibility for years, though not by desire; what we want is the opposite - a high-visibility jacket! Indeed, part of the mission of the OR Society is to help make our presence more visible. But perception involves both the observed and the observer. And all of us have open and hidden parts.

YOR18 – OR – A Twenty Twenty Vision
The 18th Young [to] OR Conference got off to a great start with the plenary session given by the President of the OR Society, Dr Geoff Royston. Antuela Tako, the chair of the organising committee, began the proceedings by telling the audience what had been planned for them and how to find out more about streams.

The Education & Research Committee
- Roles and Responsibilities: Brian Dangerfield (Liaison with ESRC)
Ruth Kaufman, Inside OR February 2013

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Posted on 09 April 2018


Forest Harvest Scheduling

Forest Harvest Scheduling with Endogenous Road Costs

The Washington State Department of Natural Resources (DNR) manages over 800,000 hectares of forested state trust lands and 20,000 kilometers of forest roads in Washington State. Forest harvest and road reconstruction decisions greatly impact the agency’s cash flows and its ability to meet its fiduciary obligations. A paper by Kai L. Ross, Sándor F. Tóth and Weikko S. Jaross used a mixed-integer programming model that integrates harvest and road scheduling decisions. They show how DNR embedded the new model in its workflows and applied it to the Upper Clearwater River Landscape in the Olympic Experimental State Forest. We find that the forest valuation of the Upper Clearwater increased by $0.5–$1 million (0.4–1.1 percent) because of the new method, which allowed the DNR to concentrate capital expenditures in support of harvest and road operations in both time and space. This led to a 14.5 percent reduction in the size of the active road network. DNR is now in the process of scaling the new approach to the entire forest estate.

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