Location Modeling Utilizing Maximum Service Distance Criteria

The location set-covering problem (LSCP) and the maximal covering location problem (MCLP) have been the subject of considerable interest. As originally defined, both problems allowed facility placement only at nodes. This paper deals with both problems for the case when facility placement is allowed anywhere on the network. Two theorems are presented that show that when facility placement is unrestricted, for either the LSCP or MCLP at least one optimal solution exists that is composed entirely of points belonging to a finite set of points called the network intersect point set (NIPS). Optimal solution approaches to the unrestricted site LSCP and MCLP problems that utilize the NIPS and previously developed solution methodologies are presented. Example solutions show that considerable improvement in the amount of coverage or the number of facilities needed to insure total coverage can be achieved by allowing facility placement along arcs of the network. In addition, extensions to the arc-covering model and the ambulance-hospital model of ReVelle, Toregas, and Falkson are developed and solved.     

CARBON AND OXYGEN ISOTOPE RATIOS OF MARBLES FROM SOME ANCIENT QUARRIES OF WESTERN ANATOLIA AND THEIR ARCHAEOLOGICAL SIGNIFICANCE

¹³C/¹²C and ¹⁸O/¹⁶O ratios have been measured for 42 marbles from the main quarry localities of archaeological interest of Western Anatolia (Marmara, Ephesos, Aphrodisias, Denizli and Afyon) in order to test the possibility of isotopically characterizing ancient marbles from this region. The various groups of samples are not clearly distinguishable on a δ¹³C-δ¹⁸O diagram. However, if only white or slightly coloured samples are considered, the isotopic method appears to be much more selective.     

The origins of the birth control movement in England in the early nineteenth century

The origins of the birth control movement in England in the 19th cen tury are discussed. The impact of Malthus's "Essay on the Principle of Population" and the activities of such thinkers and reformers as Jermy Bentham, James and John Stuart Mill, Francis Plance, Richard Carlile, Robert Dale Owen, and Charles Knowlton are discussed. The social debate that arose during the century is discussed.     

SYMPOSIUM ON INTRODUCTORY TEXTBOOKS ON PUBLIC POLICY ANALYSIS

WORLD POLICAL ECONOMY
Robert Gilpin, U.S. Power and the Multinational Corporation
Zuhayr Mikdashi, The International Politics of Natural Resources
Mason Willrich, Energy and World Politics
RECENT RELEVANT LITERATURE
J. Clarence Davies III and Barbara S. Davies, The Politics of Pollution
POLICY STUDIES PAPERS FROM NON-POLITICAL SCIENCE CONVENTIONS
A BIBLIOGRAPHY OF POLICY STUDIES BOOKS