163 research outputs found
Wielding an identity through preserving the existence of edible stinkbugs: An exploration of the linguistic terminologies used in the harvesting of the stinkbugs by the Norumedzo community of Bikita, Zimbabwe
No full textThe study explores some linguistic terminological utilisations in the harvesting and processing of the edible stinkbug (harurwa) by the Norumedzo community of Bikita district located in the southeastern part of Zimbabwe. The study also seeks to examine how the linguistic terminological utilisations are handled by the community in their everyday experiences during the stinkbug season to enhance their interaction as they engage themselves in the harvesting and processing activities. In the case of linguistics as a field of language study, it appears as though these linguistic vocabularies were an understudied area within Languages and Literature in Zimbabwe. The focus of this present study is to explore some linguistic vocabularies that are used in the edible stinkbug harvesting period and processing as well as to examine the meanings and messages they refer to within the existence of the edible stinkbug in the Norumedzo contextual settings. These observations concur very well with Austin’s (1962) assertions about the principles of pragmatics in which meaning and effect of the linguistic terms were analysed to show the ways in which the expressions represented actions and how they are intended to make meaning. Since the study assesses the historical and social life hinged on the way they manipulate language as a community, it applies a qualitative approach which captures the uses of an inter-disciplinary application of data collection methods. The main data collection methods employed in this study comprised interviews and participant observation techniques. The core of this study’s argument is centred on exploring some linguistic vocabularies that forms the basis of the Norumedzo people’s interactions during the harvesting and processing activities to perpetuate the identity, culture, tradition and conserving the heritage of this community. The findings of the study showed that the Norumedzo people possess a very rich historical identity buttressed by owning a weaponry linguistic tool that necessitates stability and continuity of the community. Findings also showed that the selected linguistic terminological utterances utilized by the Norumedzo community perform different functions such as to give meanings to some of the activities the community engage in and constitute a stylistic means of interaction pointing to their identity, history and heritage. By situating the findings of the study within the theory of pragmatics, it makes us understand how language is utilized within given contextual settings. The study concludes by recommending among other issues that human identities, cultures, traditions, and heritage should be preserved and passed on to every incoming generation for the continuity of a preserved cultural heritage and take pride in them being Africans
Stochastic Volatility: Selected Readings
No full textCollects sixteen of the main papers that have influenced the econometrics of stochastic volatility, which is associated with financial economics and mathematical finance. Papers discuss a subordinated stochastic process model with finite variance for speculative prices; a study of daily sugar prices, 1961-79; the behavior of random variables with nonstationary variance and the distribution of security prices; the pricing of options on assets with stochastic volatilities; the dynamics of exchange rate volatility; multivariate stochastic variance models; stochastic autoregressive volatility; long memory in continuous-time stochastic volatility models; Bayesian analysis of stochastic volatility models; stochastic volatility, likelihood inference, and a comparison with ARCH models; estimation of stochastic volatility models with diagnostics; pricing foreign currency options with stochastic volatility; a closed-form solution for options with stochastic volatility, with applications to bond and currency options; a unified approach to the joint estimation of objective and risk neutral measures for the purpose of options valuation; the distribution of realized exchange rate volatility; and econometric analysis of realized volatility and its use in estimating stochastic volatility models. Neil Shephard is Professor of Economics and Official Fellow in Economics at Nuffield College, University of Oxford, on the Editorial Board of the Review of Economic Studies, and Associate Editor of Econometrica. Author and subject indexes
Stochastic Volatility: Selected Readings
No full textCollects sixteen of the main papers that have influenced the econometrics of stochastic volatility, which is associated with financial economics and mathematical finance. Papers discuss a subordinated stochastic process model with finite variance for speculative prices; a study of daily sugar prices, 1961-79; the behavior of random variables with nonstationary variance and the distribution of security prices; the pricing of options on assets with stochastic volatilities; the dynamics of exchange rate volatility; multivariate stochastic variance models; stochastic autoregressive volatility; long memory in continuous-time stochastic volatility models; Bayesian analysis of stochastic volatility models; stochastic volatility, likelihood inference, and a comparison with ARCH models; estimation of stochastic volatility models with diagnostics; pricing foreign currency options with stochastic volatility; a closed-form solution for options with stochastic volatility, with applications to bond and currency options; a unified approach to the joint estimation of objective and risk neutral measures for the purpose of options valuation; the distribution of realized exchange rate volatility; and econometric analysis of realized volatility and its use in estimating stochastic volatility models. Neil Shephard is Professor of Economics and Official Fellow in Economics at Nuffield College, University of Oxford, on the Editorial Board of the Review of Economic Studies, and Associate Editor of Econometrica. Author and subject indexes
Higher S-dualities and Shephard-Todd groups
No full textAbstract: Seiberg and Witten have shown that in N=2 SQCD with Nf = 2Nc = 4 the S-duality group PSL2ℤ acts on the flavor charges, which are weights of Spin(8), by triality. There are other N=2 SCFTs in which SU(2) SYM is coupled to strongly-interacting non-Lagrangian matter: their matter charges are weights of E6, E7 and E8 instead of Spin(8). The S-duality group PSL2ℤ acts on these weights: what replaces Spin(8) triality for the E6, E7, E8root lattices? In this paper we answer the question. The action on the matter charges of (a finite central extension of) PSL2ℤ factorizes trough the action of the exceptional Shephard-Todd groups G4 and G8 which should be seen as complex analogs of the usual triality group S3≃WeylA2. Our analysis is based on the identification of S-duality for SU(2) gauge SCFTs with the group of automorphisms of the cluster category of weighted projective lines of tubular type. © 2015, The Author(s)
Central and peripheral limits to exercise...and exercise science: a young investigator's perspective
No full textThis article highlights the influence Dr. Shephard's research has had on a young academic's career, and the various lessons that can be learned from working with and following the example of Dr. Shephard
Computationally-intensive Econometrics using a Distributed Matrix-programming Language
No full textThis paper reviews the need for powerful facilities in econometrics, focusing on concrete problems which arise in financial economics and in macroeconomics. We argue that the profession is being held back by the lack of easy to use generic software which is able to exploit the availability of cheap clusters of distributed computers. Our response is to extend, in a number of directions, the well known matrix-programming interpreted language Ox developed by the first author. We note three possible levels of extensions: (i) Ox with parallelization explicit in the Ox code; (ii) Ox with a parallelized run-time library; (iii) Ox with a parallelized interpreter. This paper studies and implements the first case, emphasizing the need for deterministic computing in science. We give examples in the context of financial economics and time-series modelling.Distributed computing; Econometrics; High-performance computing; Matrix-programming language
Decade of Fear: Reporting from Terrorism’s Grey Zone
No full textMichelle Shephard, author and national security reporter for the Toronto Star, will discuss her book Decade of Fear: Reporting from Terrorism’s Grey Zone.https://insight.dickinsonlaw.psu.edu/jlia_gallery/1020/thumbnail.jp
Decade of Fear: Reporting from Terrorism’s Grey Zone
No full textMichelle Shephard, author and national security reporter for the Toronto Star, will discuss her book Decade of Fear: Reporting from Terrorism’s Grey Zone.https://elibrary.law.psu.edu/jlia_gallery/1020/thumbnail.jp
Decade of Fear: Reporting from Terrorism’s Grey Zone
No full textMichelle Shephard, author and national security reporter for the Toronto Star, will discuss her book Decade of Fear: Reporting from Terrorism’s Grey Zone.https://insight.dickinsonlaw.psu.edu/jlia_gallery/1020/thumbnail.jp
The cathedral and the bazaar of e-repository development: encouraging community engagement with moving pictures and sound
No full textThis paper offers an insight into the development, use and governance of e‐repositories for learning and teaching, illustrated by Eric Raymond's bazaar and cathedral analogies and by a comparison of collection strategies that focus on content coverage or on the needs of users. It addresses in particular the processes that encourage and achieve community engagement. This insight is illustrated by one particular e‐repository, the Education Media On‐Line (EMOL) service. This paper draws analogies between the bazaar approach for open source software development and its possibilities for developing e‐repositories for learning and teaching. It suggests in particular that the development, use and evaluation of online moving pictures and sound objects for learning and teaching can benefit greatly from the community engagement lessons provided by the development, use and evaluation of open source software. Such lessons can be underpinned by experience in the area of learning resource collections, where repositories have been classified as ‘collections‐based’ or ‘user‐based’. Lessons from the open source movement may inform the development of e‐repositories such as EMOL in the future
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