scholarly journals Dental Wear: Attrition, Erosion and Abrasion—A Palaeo-Odontological Approach

Author(s):  
Geoffrey H. Sperber

A review of the surface ablation of hominin teeth by attrition, abrasion and erosive wear. The occurrence of these lesions is explored in a sample of South African fossil australopithecine dentitions revealing excessive wear. Interpretation of the nature of the dietary components causing such wear in the absence of carious erosion provides insight into the ecology of the Plio-pleistocene epoch (1-2 million years ago). Fossil teeth inform much of the living past by their retained evidence after death. Tooth wear is the ultimate forensic evidence of lives lived.

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
John A. Kaidonis ◽  
Sarbin Ranjitkar ◽  
Dimitra Lekkas ◽  
Grant C. Townsend

For many years, research on tooth wear by dental academics has been diametrically opposite to that of anthropological research, with each discipline having a different understanding as to the nature of the wear processes. Dental focus revolved around preventive and restorative considerations while the anthropological focus was a biological understanding related to human evolution, diet, environment, form, and function and included all the craniofacial structures. Introducing the anthropological perspective into modern dentistry gives an insight into the “bigger picture” of the nature and extent of tooth wear. By combining anthropological evidence with clinical knowledge and experience, it is most likely to provide the best-informed and biologically based approach to the management of tooth wear in modern societies.


2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Davina L. Saccaggi ◽  
Melanie Arendse ◽  
John R. U. Wilson ◽  
John S. Terblanche

AbstractBiosecurity interception records are crucial data underlying efforts to predict and manage pest and pathogen introductions. Here we present a dataset containing information on imported plant products inspected by the South African Department of Agriculture’s laboratories between 1994 and 2019 and the contaminant organisms found on them. Samples were received from border inspectors as either propagation material (e.g. plants) or material for immediate use (e.g. fruit). Material for immediate use was further divided into two sample categories, depending on if contaminants were seen/suspected by the border official or not: intervention or audit samples. The final dataset consists of 25,279 records, of which 30% tested positive (i.e. had at least one contaminant) and 13% had multiple contaminants. Of the 13,731 recorded contaminants, fungi (41%), mites (37%) and insects (19%) were most common. This dataset provides insight into the suite of taxa transported along the plant import pathway and provides an important resource for analyses of contaminant organisms in international trade, which can inform strategies for risk assessment, pathway management and biosecurity protocols.


2021 ◽  
pp. 008124632110201
Author(s):  
Zamafiso Nombulelo Sibande ◽  
Rizwana Roomaney

Fatigue is a common, secondary symptom of endometriosis that has not been qualitatively explored. We conducted individual, face-to-face interviews with 25 women in South Africa about their experiences of endometriosis-related fatigue. Participants were recruited at a public hospital in Cape Town and through several South African endometriosis organizations. Interviews were conducted in English and Afrikaans and ranged from 30 min to 1 hr 16 min in duration. All interviews were audio recorded and transcribed. Interviews were analyzed using thematic analysis. We found that both the experience of fatigue and fatigue-management strategies were highly personalized. Participants reported using a variety of cognitive strategies, such as planning, pacing, and pushing through their fatigue to reduce the levels of fatigue. Participants also employed physical strategies such as rest, dietary changes, using supplements, and exercise. We found that while participants often tried fatigue-management strategies suggested to them by others, they struggled to maintain these strategies even when they were successful. There are currently no interventions aimed at reducing endometriosis-related fatigue. The findings of this study provide insight into the management of fatigue in women with endometriosis and may be used to develop a psychosocial intervention for fatigue among women with the disease.


2021 ◽  
pp. 108876792110068
Author(s):  
Brendan Chapman ◽  
Cody Raymer ◽  
David A. Keatley

Many factors affect the solvability of homicides, including body disposal location and time between death and recovery. The aim of this exploratory study was to probe a number of spatiotemporal variables for trends across a subset of solved homicide case data from 54 North American serial killers, active between 1920 and 2016 (125 solved cases) to identify areas for further research. We investigated murder site and body disposal site as location variables with eight subcategories across eight discrete time series, seeking insight into how these factors may affect the early stages of an investigation and (therefore by inference) solvability. The findings showed that bodies recovered after 48 hours are more likely discovered outdoor while those discovered within 24 hours, within the victim’s residence. This has implications for the ability to recover forensic evidence when bodes are located after a prolonged time since death as well as in more hostile environments.


2008 ◽  
Vol 19 (2) ◽  
pp. 151-158 ◽  
Author(s):  
Priscila de Oliveira Serrano ◽  
Fernanda Faot ◽  
Altair Antoninha Del Bel Cury ◽  
Renata Cunha Matheus Rodrigues Garcia

This study described changes in mandibular movements during pronunciation of /m/ and /s/ sounds in Portuguese, in patients presenting dental wear before and after appliance insertion and tooth reconstruction. Subjects were divided into a control group of dentate patients and an experimental group of patients with incisal tooth wear due to bruxism. A magnetic jaw tracking device measured the jaw opening, and translations to left and right sides of the mandible during pronunciation of phonemes. Evaluations were carried out 1 week and immediately before appliance insertion; 24 h, 7, 30 and 60 days after appliance insertion; and 1 week and 1 month after tooth reconstruction. Data were submitted to two-way ANOVA, Mann-Whitney and Friedman tests (p<0.05). Jaw opening was different (p<0.05) for both sounds in all periods. The anteroposterior amplitude for /s/ showed differences immediately before and 1 month after appliance insertion (p<0.05). Lateral amplitude for the right side showed differences between groups after appliance insertion for /s/, and 1 and 2 months after appliance insertion for the /m/ (p<0.05). Volunteers with anterior tooth wear had a wider opening movement, and the movements during speech of /m/ and /s/ sounds were not changed after appliance insertion and reconstruction of teeth.


2013 ◽  
Vol 15 (1) ◽  
Author(s):  
Cornelius Kruger ◽  
Roy D. Johnson

Background:To date, few studies have focused on how embedded Knowledge Management (KM) is found in the roots of an organisation. Specifically, not much is known whether employees and managers hold similar perceptions regarding KM or if organisational size plays a role in the establishment of KM maturity.Objective: The objective of this article was to determine what role organisational size plays in the establishment of KM maturity and how different managerial levels viewed their organisations KM maturity.Method: The authors gained insight into KM maturity in different industry groupings over a five-year period from a large urban South African University engaged in numerous collaboration programmes with industry. In total, 434 employees were interviewed over three grouping levels (operational, middle and senior management).Results: The findings support arguments that irrespective of organisational size, knowledge orientated issues are applicable to all organisations. However, with significant differences in scores recorded over all maturity sections in South Africa, the findings indicated that different sized organisations address knowledge-orientated issues differently.Conclusion: Findings challenge the argument that the manner in which knowledge-orientated issues are addressed differ only slightly depending on organisational size. Smaller-sized organisations prefer a more personal approach, whilst larger-sized organisations prefer knowledge transfer via technology. Irrespective of organisational size, commitment holds the key to KM success. Commitment shown by middle management regarding KM is a differentiator.


2020 ◽  
Vol 4 (1) ◽  
pp. 37-60
Author(s):  
MARTHINUS STANDER CONRADIE

This study combines two discourse analytic frameworks, and explores the utility of this combination for unpacking journalistic opinions written in response to a polarising and racialised event in South African education: the Overvaal High School incident. It uncovers strategic constructions of racism within politicised blame games, in the context of Overvaal, and discloses how blame-assertion and blame-denial became implicated in framings of moral panic. Methodologically, this study relies on the concept race trouble, as well as a practical model of argumentation. In conjunction, these two approaches supply insight into both the calculated construction of racism, as well as the incorporation of these constructions into arguments aimed at rationalising blame-assertion and blame-denial. The results are interpreted within theorisations of moral panic. The findings showcase how arguments are produced to blame an individual politician for escalating racial antagonism around Overvaal, instead of offering a deeply historicised and contextualised account of the incident. Consequently, the arguments that shaped the opinion pieces, and the framing of racism involved in these arguments, ultimately obfuscate inquiry into structural determinants of racial inequity. Implicitly, this framing of racism and its incorporation into argumentation and blame games, produce a form of moral panic, in which South Africans racialised as white are construed as embattled by self-serving (black) politicians. Such politicians are vilified, or rendered as folk devils, and the results indicate how this process evades penetrating analyses of racialisation and its intersection with unequal education.  


2018 ◽  
Vol 19 (2) ◽  
pp. 230-247 ◽  
Author(s):  
Natasja Steenkamp

Purpose The purpose of this paper is to develop guidelines of what award winning companies, leading practice in integrated reporting (IR) disclose in their integrated reports about material issues and their materiality determination processes. Also, to provide insight into what they disclose about their perception of materiality. Design/methodology/approach A content analysis was conducted to investigate what the top 10 South African companies of the 2015 Ernst and Young Excellence in Integrated Reporting Awards disclosed in their 2014 and 2015 integrated reports about their materiality determination processes, material issues and what materiality means to them. Thematic analyses were conducted in developing guidelines. Findings All except one company applied the International Integrated Reporting Framework. The materiality determination processes, material issues and companies’ descriptions of materiality are diverse. Material issues most companies identified relate to employees, social and environmental issues, customers and sustainable performance. Practical implications The proposed guidelines will provide useful strategies for organisations embarking on the IR journey about what issues could be considered as material and therefore included in integrated reports. It also proposes activities companies can undertake to identify, evaluate and prioritise material issues and execute their materiality determination process. Originality/value This paper is the first to develop guidelines of material matters and materiality determination processes. It also adds to existing literature on IR practice and the application of materiality.


2020 ◽  
Vol 24 ◽  
Author(s):  
Nomthandazo Ntlama

ABSTRACT The article examines the implications of the judgment of the Constitutional Court in Helen Suzman Foundation v Judicial Service Commission 2018 (7) BCLR 763 (CC) 8 on the functioning of the Judicial Service Commission (JSC). The judgment has brought to the fore a new lease of life relating to the JSC's post-interview deliberations as a disclosable record in terms of Rule 53(1)(b) of the Uniform Rules of Court. The disclosure seeks to provide an insight into the decision-making process of the JSC in the appointment of judicial officers in South Africa. It is argued that the judgment is two-pronged: first, the disclosure of the post-interview record enhances the culture of justification for decisions taken, which advances the foundational values of the new democratic dispensation; secondly, it creates uncertainty about the future management and protection of the JSC processes in the undertaking of robust debates on the post-interview deliberations. It then questions whether the JSC members will be privileged in their engagement with the suitability of the candidates to be recommended for appointment by the President. The question is raised against the uncertainty about which decision of the JSC will be challenged that will need the disclosure of the record because the judgment does not entail the national disclosure of the record in respect of each candidate but applies only when there is an application for review of the JSC decision. Key words: Judicial Service Commission, appointments, discretion, judiciary, independence, rule of law, discretion, accountability, transparency, human rights.


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