Comparison of four ballistic and thrusting target materials: An experimental and Bayesian approach using static testing of stone and steel arrow tips

Researchers use a variety of target materials, and sometimes combinations of materials, in their archaeological experiments to examine thrust-spear or projectile penetration, impact angle, durability, and other issues involving prehistoric hunting weaponry. This variety of target materials is beneficial to archaeological science in several ways, but it may also hinder the comparison of results because many of these target materials do not necessarily share similar physical properties. Here, we assess the penetration properties of four different target materials—store-bought meat, clay, and two types of gelatin—via static penetration tests of a modern broadhead-tipped arrow and a stone-tipped projectile attached to an Instron Universal Materials Tester. Our analyses of load-deflection curves, peak load, and work energy demonstrate how the four target materials are similar in some ways but different in others, which suggests that researchers may strategically employ one or several depending on the question asked or hypothesis tested.     

Scotland,Atlantic slavery and the Scottish National Party: From colonised to coloniser in the political imagination

Over the last three decades, a major shift has taken place in Scottish nationalist understandings of Scotland's colonial past. During the second half of the twentieth century, independence supporters viewed Scotland's relationship with England in colonial terms. Since the Scottish Parliament was established in 1999, nationalists have increasingly recognised Scots' role in Atlantic slavery. This paper explores this change within the Scottish National Party (SNP) using archival sources, published material and Scottish Parliamentary records. It demonstrates that a maturing historiography has drawn attention to Scotland's slavery past. History has become politically relevant in transatlantic deliberations over racial injustice, which have grown in intensity since the international Black Lives Matter protests in 2020. SNP ministers and parliamentarians have responded to this context by incorporating addressing Scotland's role in Atlantic slavery within a case for independence that is styled as progressive and contrasts with the more recalcitrant attitudes, which predominate at UK level.