Edge Angle as a Variably Influential Factor in Flake Cutting Efficiency: An Experimental Investigation of Its Relationship with Tool Size and Loading

Simple flake cutting tools were utilized across broad chronological and geographical ranges during prehistory. Fundamental to their functional utility is the presence of a relatively acute working edge. The acuteness of this ‘edge angle’ is widely hypothesized to be a primary determinant of cutting efficiency and, subsequently, of potential consequence to prehistoric peoples. However, the influence of the cutting edge angle in flake tools on the ability (efficiency) of tool users to cut through objects has not been empirically investigated under explicitly stated experimental conditions. Moreover, no consideration has been given to whether this relationship is dependent upon the size of the tool. Here, the influence that edge angle exerts on human stone tool users is examined experimentally in terms of efficiency during a cutting task, while also considering the relationship between edge angle, loading (i.e., the force applied) and overall flake size. The results demonstrate that there is a highly significant relationship between more acute working edges and increased cutting efficiency in the smallest flake tools tested. Above a certain flake‐size threshold, however, the working edge angle has no influence on cutting efficiency because larger flakes appear to facilitate the application of greater working loads by tool users. These results have important implications for potential flake selection criteria by prehistoric peoples, especially in relation to utility, function and the changing effects of edge angle through a sequence of retouch.     

博物馆劳务派遣讲解员管理初探

提要：近年来,国内为数不多的几家博物馆开始使用劳务派遣讲解员,这种用工形式涉及到劳务派遣公司、劳务派遣讲解员和博物馆三方的责权利。笔者结合近两年的博物馆劳务派遣讲解员管理工作实践,以广东省博物馆为例,就博物馆劳务派遣讲解员科学管理问题进行探讨。     

Measuring Museum Visitor Preferences Towards Opportunities for Developing Social Capital: An Application of a Choice Experiment to the Discovery Museum

This study investigates preferences of visitors to the Discovery Museum (in North East England) with respect to opportunities to develop social capital. The extent to which museums generate social capital is largely unknown, but museums have potential opportunities to develop this type of capital. This study uses a stated preference choice experiment (CE) technique to estimate museum visitor preferences towards social capital opportunities. The findings indicate that visitors have a preference for visiting a museum with another individual(s); and that the provision of participatory activities, extended opening hours and locally related displays would generate more social capital among visitors and in society.