A Biologically Informed Hylomorphism

Although contemporary metaphysics has recently undergone a neo-Aristotelian revival wherein dispositions, or capacities are now commonplace in empirically grounded ontologies, being routinely utilised in theories of causality and modality, a central Aristotelian concept has yet to be given serious attention – the doctrine of hylomorphism. The reason for this is clear: while the Aristotelian ontological distinction between actuality and potentiality has proven to be a fruitful conceptual framework with which to model the operation of the natural world, the distinction between form and matter has yet to similarly earn its keep. In this chapter, I offer a first step toward showing that the hylomorphic framework is up to that task. To do so, I return to the birthplace of that doctrine - the biological realm. Utilising recent advances in developmental biology, I argue that the hylomorphic framework is an empirically adequate and conceptually rich explanatory schema with which to model the nature of organism

Rabies on the Last Frontier: A Phylogeographical Look at Red (Vulpus vulpus) and Arctic (Vulpus lagopus) Fox with Respect to Mitochondrial DNA and the Spatial Diffusion of Rabies

Vulpus vulpus and Vulpus lagopus are terrestrial animals that live in Alaska. They are also common carriers of the rabies virus. It has been determined that there are three different clades of rabies in Alaska being vectored by these two species of fox, but it is not clear why there are no endemic rabies in the Interior. We are interested in the migration patterns of Vulpus vulpus and Vulpus lagopus, the spread and maintenance of the rabies virus as a function of climate warming. We hypothesize that there is some element, whether biological or geographical, that restricts the virus from spreading into the interior and maintaining itself as much as it does in the coastal regions of Alaska. This research provides a model for determining how the virus spreads under retreating Arctic conditions, as the globe warms

The auditor as historian: Reflections of the epistemology of financial reporting

Concern has been growing recently that the modern commercial organisation is becoming less auditable. The volume and complexity of transactions and the opacity of computer-based information systems, coupled with the increased knowledge gap between auditors and clients, make the auditor reliant on evidence whose quality and reliability is open to broad challenges. At the same time, the changing nature of financial reports, from summaries of the past to images of the present and windows on the future, weakens the link between evidence of underlying activities and transactions and their representation in financial statements.This exacerbates the epistemological challenge faced by accountants and auditors: how can financial statements be said to be a faithful representation of an entity, and how can auditors give a well-grounded opinion that the financial statements give a true and fair view? These issues are by no means unique to financial reporting. Similar problems arise in historical research, where historical theorists and practical historians have had to grapple with the nature and status of evidence of the past and the relationship between evidence and historical narratives. By examining contemporary debates within the literature of historiography, insights into comparable issues within financial reporting and auditing should be gained.The paper concentrates in particular on the contribution to the historiographical debate made by Keith Jenkins. Through his books Re-thinking History (1991), On “What is History?” (1995) and Why History? Ethics and Postmodernity (1999), and his edited collection The Postmodern History Reader (1997), Jenkins has provocatively challenged more mainstream views of the historian’s relationship with evidence, indeed the nature of historical evidence itself, in ways that raise issues for the conventional understanding of evidence in the audit context. The arguments of Jenkins are contrasted with those of C. Behan McCullagh, whose The Truth of History (1998) explicitly explores the extent to which historical descriptions can be “true and fair”, and thus provides a direct analogy between the task of the historian and that of the auditor. The paper concludes that auditing stands or falls in an epistemological sense with history, in that the statements of auditors bear essentially the same relationship to audit evidence as those of historians bear to historical evidence. If, in a postmodern world,histories that claim to tell a unique “truth” are not just logically impossible but also ethically immoral, then so are financial statements and audit reports

Influence of Taper on the Flexibility of Nickel-Titanium Rotary Files

Introduction: Modern nickel-titanium instruments have various tapers and have been marketed to have superior flexibility from previous generations. Current ISO standards require force measurements at a static point along the file. Unfortunately, root canal anatomy varies and produces multiple forces along the length of the file. The purpose of this study was to determine the influence of taper on the flexibility of various nickel-titanium files. Materials and Methods: The flexibility of stainless steel hand files and nickel-titanium rotary files of various tapers was measured. The sample size was 10 for each type, taper and size. The files were measured at 3, 5 and 7 mm from the tip using a digital caliper and marked with a rubber stopper and a distance of 20mm from the tip was used as the deflection point. Each file was securely fastened on a load-sensing cell and bending was accomplished using a universal testing machine to a maximum deflection of 4.5 mm at a rate of 2 mm/minute under room temperature conditions (22OC ±1OC). Data was collected electronically via Merlin Software and transferred to Microsoft Excel. Statistical analysis was completed with IBM SPSS Statistics software and a two-way analysis of variance (ANOVA) was used as well as a Post-hoc Tukey test. Results: The force and bending moments of EndoSequence .06 taper files was significantly greater (p\u3c0.05) than EndoSequence .04 and stainless steel hand files at all lengths. No significant difference was noted between EndoSequence .04 and stainless steel hand files from 0.25 mm to 3.0 mm. From 3.5 mm to 4.5 mm, the force and bending moments for stainless steel hand files was significantly greater (p\u3c 0.05) than EndoSequence .04 files. Within each file group, the force and bending moments were significantly greater (p\u3c0.05) as the grasp length increased (7 mm\u3e5 mm\u3e3 mm). Conclusions: With a vast array of root canal instruments currently available clinicians should consider the properties of instruments before cleaning and shaping. Nickel-titanium files with tapers greater than 0.04 should not be used for apical enlargement of curved canals because these files are significantly stiffer resulting in an increased chance of canal transportation