328 research outputs found
Modelling of some biological materials using continuum mechanics
No full textContinuum mechanics provides a mathematical framework for modelling the physical stresses experienced by a material. Recent studies show that physical stresses play an important role in a wide variety of biological processes, including dermal wound healing, soft tissue growth and morphogenesis. Thus, continuum mechanics is a useful mathematical tool for modelling a range of biological phenomena. Unfortunately, classical continuum mechanics is of limited use in biomechanical problems. As cells refashion the �bres that make up a soft tissue, they sometimes alter the tissue's fundamental mechanical structure. Advanced mathematical techniques are needed in order to accurately describe this sort of biological `plasticity'. A number of such techniques have been proposed by previous researchers. However, models that incorporate biological plasticity tend to be very complicated. Furthermore, these models are often di�cult to apply and/or interpret, making them of limited practical use. One alternative approach is to ignore biological plasticity and use classical continuum mechanics. For example, most mechanochemical models of dermal wound healing assume that the skin behaves as a linear viscoelastic solid. Our analysis indicates that this assumption leads to physically unrealistic results. In this thesis we present a novel and practical approach to modelling biological plasticity. Our principal aim is to combine the simplicity of classical linear models with the sophistication of plasticity theory. To achieve this, we perform a careful mathematical analysis of the concept of a `zero stress state'. This leads us to a formal de�nition of strain that is appropriate for materials that undergo internal remodelling. Next, we consider the evolution of the zero stress state over time. We develop a novel theory of `morphoelasticity' that can be used to describe how the zero stress state changes in response to growth and remodelling. Importantly, our work yields an intuitive and internally consistent way of modelling anisotropic growth. Furthermore, we are able to use our theory of morphoelasticity to develop evolution equations for elastic strain. We also present some applications of our theory. For example, we show that morphoelasticity can be used to obtain a constitutive law for a Maxwell viscoelastic \ud
uid that is valid at large deformation gradients. Similarly, we analyse a morphoelastic model of the stress-dependent growth of a tumour spheroid. This work leads to the prediction that a tumour spheroid will always be in a state of radial compression and circumferential tension. Finally, we conclude by presenting a novel mechanochemical model of dermal wound healing that takes into account the plasticity of the healing skin
From temple to house-church in Luke-Acts: a Lukan challenge to Korean Christianity
No full textThis dissertation examines the portrayals of the Temple, synagogue, and
house-churches in Luke-Acts to pose a Lukan challenge to the Korean church by using
a model of architectural space which is derived from social-scientific ideas originating
in anthropology, sociology and social psychology. The dissertation proposes the
relevance of the Lukan house-church to the Korean church today so as to transform
the latter's character in its architecture and use of space into the inclusive and
missionary one which is featured in Luke-Acts. The argument of the dissertation
begins with an exploration and defence of social-scientific method (Chapter 1).
Chapter 2 begins with a history and analysis of Korean Christianity which raises
problem surrounding its use of architectural space, before setting out a socialscientific
model of architectural space, which is then applied to contemporary Korean
church architecture. Challenging current understandings of a positive Lukan attitude
toward the Temple, this study proposes in Chapter 3 that Luke had a negative
understanding of the Temple in that it was an oppressive institution characterised by
segmented spaces which divided the people of God and thus showed its illegitimacy in
relation to the saving plan of God in Jesus. The dissertation next proposes in Chapter
4 that first-century synagogues were subsidiary Temple spaces which were extended
to most parts of Mediterranean world from the central sanctuary in Jerusalem, and that
Luke portrays the synagogues as similar to the Temple. Contrary to the Temple and
synagogue, the house in Luke-Acts expresses the inclusive salvation of the gospel
which incorporates a variety of people regardless of social status, gender, age and
ethnic origin (Chapter 5). In this interpretation, the house-church is represented as an
inclusive space accessible without institutional constraints. In the Gospel, it serves to
express the Kingdom of God into which sinners are invited to enter through meals and
to be incorporated into a fictive-kinship group created by Jesus. In Acts, the house is
not only a locus of Christian meetings in which the social relationships, characteristic
of family, are practised to enhance and legitimise the social identity of Jesus'
followers, but also the modus operandi of Christian mission through which the Christ-movement
spreads throughout the Mediterranean world. This study concludes with an
Epilogue containing brief suggestions for changes in Korean church architecture and
use of space based on these Lukan insights, which have the potential radically to
transform Korean Protestant Christianity
The Ascension of Jesus Christ: A Critical and Exegetical Study of the Ascension in Luke-Acts and in the Jewish and Christian Contexts
No full textThe aim of the present dissertation is to analyse and interpret the Ascension of Jesus as described in Luke-Acts, and to examine both the Jewish rapture traditions and the early Christian reception and interpretation of the Lukan accounts. In my research, I tried to explain how the Ascension event was shaped by Luke and the impact it had within the Christian Church of the first centuries.
The first chapter tackles the history of research on the Ascension and the proposed methodology. Following this, the second section of the thesis analyses the Jewish assumption (rapture) traditions found in both canonical and pseudepigraphal writings. The common elements between these traditions and the Ascension of Christ are observed in order to establish a certain dependence of the Ascension narrative on Jewish rapture accounts.
In the third chapter, I examine the two Ascension accounts in Luke-Acts (Lk 24:50-53; Acts 1:9-11) and aim to explain the apparent inconsistencies between them. Certain aspects, such as redundancy and variations, are discussed in detail in the third section of this chapter.
The fourth chapter focuses on the reception and interpretation of the Lukan Ascension narratives within the early Christian Church (the pre-Nicene period). Finally, a summary of the entire thesis and some final remarks are drawn in the conclusion of the present study.
Two excursuses relevant to this research are included in the appendices: the first on the Jewish Hekhalot literature and Merkabah mysticism; and the second examining the Ascension in the Gospels according to Mark (16:19-20 of the ‘longer ending’) and John (20:17)
Asymptotic expressions for the nearest and furthest dislocations in a pile-up against a grain boundary
No full textIn 1965, Armstrong and Head (Acta Metall. 13(7):759–764, 1965) explored the problem of a pile-up of screw dislocations against a grain boundary. They used numerical methods to determine the positions of the dislocations in the pile-up and they were able to fit approximate formulae for the locations of the first and last dislocations. These formulae were used to gain insights into the Hall-Petch relationship. More recently, Voskoboinikov et al. (Phil. Mag. Lett. 87(9):669-676, 2007) used asymptotic techniques to study the equivalent problem of a pile-up of a large number of screw dislocations against a bimetallic interface.\ud
\ud
In this paper, we extend the work of Voskoboinikov et al. to construct systematic asymptotic expressions for the formulae proposed by Armstrong and Head. The further extension of these techniques to more general pile-ups is also outlined. As a result of this work, we show that a pile-up against a grain boundary can become equivalent to a pile-up against a locked dislocation in the case where the mismatch across the boundary is small
Light Beneath a Canopy (First Movement)
No full textBen Reyes, Henry Goodwin, trumpets; Payton Chadwick, Emma Johnson, Cameron Elliott, Tayler Goodwin, horns; Preston Ridgell, Josh Bishop, trombones; C.J. Luke, bass trombone; Steven Kosch, euphonium; Zach Grass, tuba; Premiere performance of a composition for brass ensemble by ECU student composer Isaac Ward. Recorded at A.J. Fletcher Recital Hall on April 20th, 201
Light Beneath a Canopy (First Movement)
No full textBen Reyes, Henry Goodwin, trumpets; Payton Chadwick, Emma Johnson, Cameron Elliott, Tayler Goodwin, horns; Preston Ridgell, Josh Bishop, trombones; C.J. Luke, bass trombone; Steven Kosch, euphonium; Zach Grass, tubaPremiere performance of a composition for brass ensemble by ECU student composer Isaac Ward. Recorded at A.J. Fletcher Recital Hall on April 20th, 201
Social rights and economics : claims to health care and education in developing countries
No full textThe author analyzes contemporary rights-based and economic approaches to health care and education in developing countries. He assesses the foundations and uses of social rights in development, outlines an economic approach to improving health and education services, and then highlights the differences, similarities, and the hard questions that the economic critique poses for rights. The author argues that the policy consequences of rights overlap considerably with a modern economic approach. Both the rights-based and the economic approaches are skeptical that electoral politics and de facto market rules provide sufficient accountability for the effective and equitable provision of health and education services, and that further intrasectoral reforms in governance, particularly those that strengthen the hand of service recipients, are needed. There remain differences between the two approaches. Whether procedures for service delivery are ends in themselves, the degree of disaggregation at which outcomes should be assessed, the consequences of long-term deprivation, metrics used for making tradeoffs, and the behavioral distortions that result from subsidies are all areas where the approaches diverge. Even here, however, the differences are not irreconcilable, and advocates of the approaches need not regard each other as antagonists.Health Monitoring&Evaluation,Health Systems Development&Reform,Decentralization,Public Health Promotion,Early Child and Children's Health,Health Monitoring&Evaluation,Health Economics&Finance,Poverty Assessment,Agricultural Knowledge&Information Systems,Gender and Education
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Doctoral Recitals
No full textRecital presented at the UNT College of Music Recital Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree
Information-based instruments for improved urban management
No full textThe task of urban managers is to ensure the provision of basic urban services, such as water, waste removal, security, transport, and an environment conducive to economic activity, while maintaining fiscal sustainability of city operations. City managers in developing countries face increasing pressure in achieving these goals because of rapid urbanization, the larger responsibilities following decentralization, and the economic challenges of globalization. Based on experience in Bangalore, India, the authors argue that effective, forward-looking urban management requires a much better information infrastructure than is currently available in most cities.Environmental Economics&Policies,Public Health Promotion,Public Sector Economics&Finance,Decentralization,ICT Policy and Strategies,Environmental Economics&Policies,ICT Policy and Strategies,Public Sector Economics&Finance,Municipal Financial Management,Banks&Banking Reform
Fall Jazz Festival, Disc One
No full textVCU Fall Jazz Festival- Disc One of Two
Jazz Orchestra IIToby Whitaker, Director
Jazz Orchestra I Antonio García, Director Jazz Faculty
including
J.C. Kuhl (saxophone), Rex Richardson (trumpet), Antonio García (trombone), Mike Ess (guitar), Wells Hanley (piano), Eric Wheeler (bass), and Tony Martucci (drum set)
and Guests via video
Wycliffe Gordon (trombone), Luke Carlos O’Reilly (piano),
Daniel Clarke (piano), and Cameron Ralston (bass)
8 p.m. Thursday, October 8, 2020
Sonia Vlahcevic Concert Hall
W.E. Singleton Center for the Performing Arts
Virginia Commonwealth University
922 Park Avenue | Richmond, VA
arts.vcu.edu/musi
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