The value chain, developed by Porter and his associates at the Harvard Business School [Porter, .1980; Porter, 1985], is a useful method of understanding and controlling the costs involved in a wide variety of organizational enterprises. It identifies a canonical set of cost sources or value activities, represent"ing the basic activities an organization can choose from to create added value for...

This paper describes a word stemming algorithm for the Spanish Language. Experiments in document retrieval regarding English text suggest that word stemming based on morphological analysis does not generally or consistently outperform ad-hoc hand tuned algorithms such as that proposed by Porter (Porter M., 1980). It is difficult to produce a Porter style algorithm for a Romance languages such a...

There are environmental health concerns for dental health care providers chronically exposed to trace amounts of waste nitrous oxide (N2O). This study compared the effectiveness of three N2O scavenging systems, the Porter/Brown, the Accutron, and the Matrx, in actual time during use in a standardized mock dental treatment protocol that reflected clinical practice while minimizing the influence ...

To handle the uncertainty inherent in eCommerce transactions, reputation systems have emerged as a way to represent reliability and develop trust between transaction participants. Despite the value added by reputation systems, limitations of existent systems remain (Malaga 2001). We empirically test Porter et al.’s (2004) reputation scoring procedure, which was designed to address the shortcomi...