Center Problems and Median Problems

Introduction In this chapter, we would like to find optimal (or approximately optimal) locations for routine services, such as airports, factories, warehouses, schools, garbage incinerators, prisons, etc., as well as for emergency services such as ambulances, fire stations and snow plows. Locational decisions are based on many factors; some of these factors are physical, economic, social, environmental or political. Our focus will be on the quantitative analysis of discrete problems. That is, the locations must be chosen from a finite number of potential sites selected in a preliminary stage. We focus on three types of problems: 1. Center problems (also called minimax problems): 106 8.2. THE BASIC MODEL FOR MEDIAN PROBLEMS AND CENTER PROBLEMS 107 A given number of facilities (or services) must be located so as to minimize the maximum travel cost (or maximum travel time) of the users to/from the facilities. These problems usually arise in applications invol

Against Women And Girls

s. This issue of the Innocenti Digest has been researched and written by Sushma Kapoor, Consultant to the UNICEF Innocenti Research Centre. It has benefited from the input of more than 20 international experts who attended the Consultation on Domestic Violence, held at the UNICEF Innocenti Research Centre in April 2000. With special thanks to: Radhika Coomaraswamy, United Nations Special Rapporteur on Violence Against Women. The Centre is grateful for input from: Shahida Azfar, Rosa Bernal, Kiran Bhatia, Misrak Elias, Ruth Finney Hayward, Nigel Fisher, Claudia Garcia Moreno, Srilakshmi Gururaja, Dale Hurst, Tomoko Ishii, Takako Konishi, Soledad Larrain, Nicoletta Livi-Bacci, Neill McKee, Zaynab Nawaz, Njoki Ndung'u, Monica O'Connor, Michael Rodriguez, Rima Salah, Lavinia Shikongo, Fatoumata Sir Diakit, Susan B. Sorenson, Stephen H. Umemoto, Rukhsana Zia. The Digest was prepared under the overall guidance of Nigel Cantwell, Maryam Farzanegan and Mehr Khan. Previous Digests have