An important problem for the homeless service sector is understanding the size of homeless populations, which has implications on planning services and social policy. The aim of this study is to apply capture-recapture methods to count the primary homeless population in the Adelaide city council...

The trust of sellers and transactions is a very important issue in e-commerce and e-service environments. At some e-commerce websites (such as eBay1), the trust management mechanism can compute a trust value of a seller, which is based on the ratings of past transactions given by buyers. This...

Exchange rate uncertainty is said to have negative or positive effects on the trade flows. A Large body of the empirical research that tries to address the issue has used aggregate trade data between one country and rest of the world, or bilateral total trade data between two countries. The...

We consider the single machine job sequencing problem with release dates. The main purpose of this paper is to investigate efficient and effective approximation algorithms with a bicriteria performance guarantee.