This paper gives an overview of our work on generic visitors 12], and it gives a comparison of two implementations, in Java and Smalltalk. For object-oriented programming, the Visitor pattern 3] enables the deeni-tion of a new operation on an object structure without changing the classes of the objects. The discovery of generic visitors is due to striking parallels with shape polymorphic 5], or...

High priority is given to ensuring that there is the right number of staff to provide care. The NHS national recruitment campaign has met well ahead of target the commitment set out in The NHS plan3 to recruit 20,000 extra nurses in the NHS by 2004. This achievement reflects both the success of local recruitment initiatives and events and the effective collaboration between the NHS, workforce d...

New Zealand was discovered by Captain Cook in 1769. Over the next ninety years, increasing numbers of medical practitioners visited and began to settle in what became a British colony. The first medical visitors were usually naval surgeons or served on board whaling ships. The major influx of doctors occurred at the behest of the New Zealand Company between 1840 and 1848, although Christian mis...

Navigating websites is often a frustrating process: Website visitors, despite their widely varying and individual information-seeking needs, must contend with static, general-purpose link structures that have been set in place by website owners. Because many visitors tend to browse for the same content, they are individually repeating the same navigation activity. Visitors would benefit from be...

Online retailers offering their products across national and cultural borders are eager to enhance the usability of their websites to attract large numbers of visitors. The results of the present research show that the perceived usability increases when the website was originally conceived in the native language of the user. Thus, translation, even though of excellent quality, creates a cultura...

The location choices made by visitors have important implications for wilderness management. The cumulative effect of visitors’ choices produces recreational use distributions, and many studies show that these are typically very uneven. A small proportion of access points accounts for most use, and use of trails or water routes is very uneven. Some campsites are heavily used while others are ra...

let $pi_e(g)$ be the set of element orders of a finite group $g$‎. ‎let $nse(g)={m_nmid ninpi_e(g)}$‎, ‎where $m_n$ be the number of elements of order $n$ in $g$‎. ‎in this paper‎, ‎we prove that if $nse(g)=nse(l_2(81))$‎, ‎then $gcong l_2(81)$‎.

In this study, the recreational value of ShirinSou Wetland of the Kabodarahang County in Hamadan Province, Iran was estimated and the visitors' willingness to Pay (WTP) was measured by using Contingent Valuation Method (CVM) and One and One Half Bound model (OOHB) dichotomous choice (DC) questionnaire. The results show that 81 percent of investigating individuals will pay for recreational usage...