The intensification of aridity due to anthropogenic climate change is likely to have a large impact on the growth and survival of plant species in the southwestern U.S. where species are already vulnerable to high temperatures and limited precipitation. Global climate change impacts plants through a rising temperature effect, CO2 effect, and land management. In order to forecast the impacts of global climate change, it is necessary to know the current conditions and create a baseline for future comparisons and to understand the factors and players that will affect what happens in the future. The objective of Chapter 1 is to create the very first high resolution, accurate, park-wide map that shows the distribution of dominant plants on the Colorado Plateau and serves as a baseline for future comparisons of species distribution. If we are going to forecast what species have already been impacted by global change or will likely be impacted in the future, we need to know their physiology. Chapter 2 surveys the physiology of the twelve most abundant non-tree species on the Colorado Plateau to help us forecast what climate change might do and to understand what has likely already occurred. Chapter 1. Our objective was to create an accurate species-level classification map using a combination of multispectral data from the World View-3 satellite and hyperspectral data from a handheld radiometer to compare pixel-based and object-based classification. We found that overall, both methods were successful in creating an accurate landscape map. Different functional types could be classified with fairly good accuracy in a pixel-based classification but to get more accurate species-level classification, object-based methods were more effective (0.915, kappa coefficient=0.905) than pixel-based classification (0.79, kappa coefficient=0.766). Although spectral reflectance values were important in classification, the addition of other features such as brightness, texture, number of pixels, size, shape, compactness, and asymmetry improved classification accuracy.Chapter 2. We sought to understand if patterns of gas exchange to changes in temperature and CO2 can explain why C3 shrubs are increasing, and C3 and C4 grasses are decreasing in the southwestern U.S. We conducted seasonal, leaf-level gas exchange surveys, and measured temperature response curves and A-Ci response curves of common shrub, forb, and grass species in perennial grassland ecosystems over the year. We found that the functional trait of being evergreen is increasingly more successful in climate changing conditions with warmer winter months. Grass species in our study did not differentiate by photosynthetic pathway; they were physiologically the same in all of our measurements. Increasing shrub species, Ephedra viridis and Coleogyne ramosissima displayed functional similarities in response to increasing temperature and CO2.

The intensification of aridity due to anthropogenic climate change is likely to have a large impact on the growth and survival of plant species in the southwestern U.S. where species are already vulnerable to high temperatures and limited precipitation. Global climate change impacts plants through a rising temperature effect, CO2 effect, and land management. In order to forecast the impacts of global climate change, it is necessary to know the current conditions and create a baseline for future comparisons and to understand the factors and players that will affect what happens in the future. The objective of Chapter 1 is to create the very first high resolution, accurate, park-wide map that shows the distribution of dominant plants on the Colorado Plateau and serves as a baseline for future comparisons of species distribution. If we are going to forecast what species have already been impacted by global change or will likely be impacted in the future, we need to know their physiology. Chapter 2 surveys the physiology of the twelve most abundant non-tree species on the Colorado Plateau to help us forecast what climate change might do and to understand what has likely already occurred. Chapter 1. Our objective was to create an accurate species-level classification map using a combination of multispectral data from the World View-3 satellite and hyperspectral data from a handheld radiometer to compare pixel-based and object-based classification. We found that overall, both methods were successful in creating an accurate landscape map. Different functional types could be classified with fairly good accuracy in a pixel-based classification but to get more accurate species-level classification, object-based methods were more effective (0.915, kappa coefficient=0.905) than pixel-based classification (0.79, kappa coefficient=0.766). Although spectral reflectance values were important in classification, the addition of other features such as brightness, texture, number of pixels, size, shape, compactness, and asymmetry improved classification accuracy.Chapter 2. We sought to understand if patterns of gas exchange to changes in temperature and CO2 can explain why C3 shrubs are increasing, and C3 and C4 grasses are decreasing in the southwestern U.S. We conducted seasonal, leaf-level gas exchange surveys, and measured temperature response curves and A-Ci response curves of common shrub, forb, and grass species in perennial grassland ecosystems over the year. We found that the functional trait of being evergreen is increasingly more successful in climate changing conditions with warmer winter months. Grass species in our study did not differentiate by photosynthetic pathway; they were physiologically the same in all of our measurements. Increasing shrub species, Ephedra viridis and Coleogyne ramosissima displayed functional similarities in response to increasing temperature and CO2.

This social history of science policy development emphasizes the impact on the agricultural community of federal policies regarding release of recombinant DNA (rDNA) organisms into the environment. The history also demonstrates that the U.S. Coordinated Framework for Biotechnology Regulation (1986) is based principally in political criteria, not solidly based in science as its proponents claimed. The power struggle among policy negotiators with incompatible belief systems resulted in a political correction of biotechnology. I also demonstrate that episodes in the rDNA controversy occur in repetitive and periodic patterns. During the 1980s, the first rDNA microbial pesticide, Ice-Minus, struggled through a policy gauntlet of federal agency approval processes, a Congressional hearing, and many legal actions before it was finally released into the environment. At the height of the controversy (1984-1986), the Reagan Administration would admit no new laws or regulations to slow the development of technologies or hinder American international competitiveness. At the same time, Jeremy Rifkin, a radical activist representing a green world view, used the controversy to agitate for social and economic reform. Meanwhile, a group of Congressional aides who called themselves the "Cloneheads" used the debate to fight for more public participation in the science policy-making process. Conflicting perspectives regarding biotechnology originated, not in level of understanding of the science involved, but in personal perspectives that were outwardly expressed as political group affiliations. The direction of federal biotechnology policy was influenced most successfully by politically best-positioned individuals (what I call a "hierarchy effect") who based decisions on how biotechnology harmonized with their pre-existing beliefs. The success of their actions also depended on timing. Historical events during the rDNA controversy followed the same periodic pattern--gestation, threshold, crisis/conflict, and quasi-quiescence--through two consecutive eras--the Containment Era (1970s) and the Release Era (1980s). These periods are modeled after Fletcher's stages through which ethical issues evolve (1990). However, an agricultural perspective on the debate reveals that such stages also occur in finer detail on repeating, overlapping, and multi-level scales. Knowledge of this periodicity may be useful in predicting features of future episodes of the rDNA controversy. / Ph. D.

The thesis of this study revolves around the validity of Tshivenda literature as an authorative commentary on Mission Work in Venda. The value of literary works by selected Tshivenda writers is explored on three important directions: (a) as a source of information on the Vhavenda world-view which is an important aspect in the Vhavenda's understanding of the Missionary message; (b) as a source of challenge to missiology, and (c) as a source of basis for an in-depth contextual missiology. The well-meaning contributions of the German Missionaries is appreciated. Their influence through the spreading of Lutheranism and also in the birth of Tshivenda literature is clearly recognized. My task has not only been to see these positive contributions, but also to problematise and explore both the missionary instrumentality and the local responses that are reflected in the Tshivenda literature. Our first four chapters introduce the thesis, they cover political history of the Vhavenda which is fundamental in our understanding of their world-view and the early missionary works in Venda. Selected Tshivenda novels become the object of inquiry in the fifth chapter. The novels help us in our evaluation of Missionary Christianity. A wide variety of issues are contained in these novels which are significant in Mission work. The sixth chapter concentrates on selected Tshivenda short stories. In two of these short stories the issue of racism is highlighted. The seventh chapter looks into a few Tshivenda Poems. In two of these poems the Missionary-rejected name for God, Nwali, is heavily used. The last chapter contains the essential commentary of indigenous Tshivenda literature on Missionary Christianity as well as the implications for both global and local Missiology. / Missiology. / M.(Theology)

Thesis (PhD)--Stellenbosch University, 2002. / Tot op hede is die studie van die semantiek tot 'n groot mate bëinvloed deur die taalkundige perspektiefvan die navorser. Dit het dikwels gelei tot resultate wat skeefgetrek is deur die voorveronderstellings van die navorser. Sommige aspekte van betekenis wat van primêre belang is vir die semantiese beskrywing van bepaalde taalkundige konstruksies is in die proses nie genoegsaam, of glad nie, aan die orde gestel nie. Semantiek as 'n interdissiplinêre wetenskap het 'n komplekse karakter aangesien taalkunde, antropologie, kognitiewe sielkunde en, afhangend van die doel van 'n bepaalde semantiese analise, ander verwante dissiplines daarin 'n rol kan speel. Om die rede is daar 'n behoefte aan 'n omvattende benadering in terme waarvan die verskillende faktore verreken kan word. In die semantiese analise van Bybel-Hebreeuse konstruksiesvorm die kulturele agtergrond van leksikale items 'n integrale deel van die semantiese inhoud van hierdie items. In die lig van die beduidende historiese en kulturele verskille tussen die konteks(te) van die Ou Testament en die konteks(te) van hedendaagse lesers is dit dus belangrik om die kulturele dimensie van 'n semantiese analise van Bybels-Hebreeuse leksikale items sistematies aan die orde te stel. So 'n benadering is van groot belang vir Bybelvertaling wat by uitstek 'n proses van interkulturele kommunikasie is. Bybelvertalers het 'n behoefte aan analitiese instrumente wat al die fasette van die semantiese inhoud van Bybels-Hebreeuse lekseme verdiskonteer. Die doel van hierdie studie is om 'n semantiese model te ontwerp wat vir die doel gebruik kan word. Die vertrekpunt van die studie is die teorie van komponensiële analise. Die geskiedenis en ontwikkeling van die model word krities bespreek. Die moontlikhede wat hierdie teorie bied vir 'n meer omvattende model word ondersoek. Besondere aandag word gegee aan die nut wat hierdie benadering het as heuristiese instrument vir die semantiese analises. Die komponensiële analise van betekenis word op hierdie manier geïdentifiseer as 'n benadering wat nie te gou afgeskiet moet word as synde te eng strukturalisties nie. Inteendeel, dit kan ook as 'n buigsame instrument ontwikkel word wat nie net betekenisrelasies in terme van dichotomieë kan beskryf nie. Dit kan ook gebruik word om 'n wye verskeidenheid semantiese verhoudings te analiseer wat insigte van die kognitiewe taalkunde insluit. Daar is verder bevind dat die konsep "semantiese universalium" wat 'n belangrike komponent is van sommige benaderings tot leksikale semantiek weinig waarde het vir 'n semantiese analise wat 'n bydrae wil maak tot vertaling as interkulturele kommunikasie. Die universele kategorieë is meestal so generies dat hulle weinig bydrae tot die beskrywing van die fyner nuanses van lekseme wat tot dieselfde semantiese veld behoort. Daar moet eerder gepoog word om in soverre dit moontlik is 'n instument te ontwikkel wat taal en kultuur spesifiek is. Die kategorieë en kriteria vir die semantiese analise moet verder aan die hand van die brontaal en - kultuur self ontwikkel word. Die navorser moet baie versigtig wees dat sy ofhaar eie teoretiese voorveronderstellings nie op die ondersoek-instrument afgedruk word nie. In die ondersoek is gevind dat die kulturele dimensie van die leksikale items nie genoegsaam verreken kan word, sonder om die wêreldbeeld te analiseer wat ten grondslag lê van die tekste waarin die leksikale items voorkom nie. Vir die doel is 'n analitiese modelontwikkel. Hierdie buigsame model gebruik 'n stel veranderlikes om die tipiese wêreldbeeld te identifiseer wat ten grondslag lê van 'n bepaalde korpus van tekste. Nadat die onderliggende wêreldbeeld van die boek van Jesaja beskryf is, word die leksikale items in hierdie boek, wat behoort tot die semantiese veld "negatiewe morele gedrag" geanaliseer. Op grond van die resultate word 'n aantal aanbevelings gemaak oor die wyse waarop hierdie items in 'n Hebreeuse leksikon beskryf kan word. / AFRIKAANSE OPSOMMING: Tot op hede is die studie van die semantiek tot 'n groot mate bëinvloed deur die taalkundige perspektief van die navorser. Dit het dikwels gelei tot resultate wat skeefgetrek is deur die voorveronderstellings van die navorser. Sommige aspekte van betekenis wat van primêre belang is vir die semantiese beskrywing van bepaalde taalkundige konstruksies is in die proses nie genoegsaam, of glad nie, aan die orde gestel nie. Semantiek as 'n interdissiplinêre wetenskap het 'n komplekse karakter aangesien taalkunde, antropologie, kognitiewe sielkunde en, afhangend van die doel van 'n bepaalde semantiese analise, ander verwante dissiplines daarin 'n rol kan speel. Om die rede is daar 'n behoefte aan 'n omvattende benadering in terme waarvan die verskillende faktore verreken kan word. In die semantiese analise van Bybel-Hebreeuse konstruksies vorm die kulturele agtergrond van leksikale items 'n integrale deel van die semantiese inhoud van hierdie items. In die lig van die beduidende historiese en kulturele verskille tussen die konteks(te) van die Ou Testament en die konteks(te) van hedendaagse lesers is dit dus belangrik om die kulturele dimensie van 'n semantiese analise van Bybels-Hebreeuse leksikale items sistematies aan die orde te stel. So 'n benadering is van groot belang vir Bybelvertaling wat by uitstek 'n proses van interkulturele kommunikasie is. Bybelvertalers het 'n behoefte aan analitiese instrumente wat al die fasette van die semantiese inhoud van Bybels-Hebreeuse lekseme verdiskonteer. Die doel van hierdie studie is om 'n semantiese model te ontwerp wat vir die doel gebruik kan word. Die vertrekpunt van die studie is die teorie van komponensiële analise. Die geskiedenis en ontwikkeling van die model word krities bespreek. Die moontlikhede wat hierdie teorie bied vir 'n meer omvattende model word ondersoek. Besondere aandag word gegee aan die nut wat hierdie benadering het as heuristiese instrument vir die semantiese analises. Die komponensiële analise van betekenis word op hierdie manier geïdentifiseer as 'n benadering wat nie te gou afgeskiet moet word as synde te eng strukturalisties nie. Inteendeel, dit kan ook as 'n buigsame instrument ontwikkel word wat nie net betekenisrelasies in terme van dichotomieë kan beskryf nie. Dit kan ook gebruik word om 'n wye verskeidenheid semantiese verhoudings te analiseer wat insigte van die kognitiewe taalkunde insluit. Daar is verder bevind dat die konsep "semantiese universalium" wat 'n belangrike komponent is van sommige benaderings tot leksikale semantiek weinig waarde het vir 'n semantiese analise wat 'n bydrae wil maak tot vertaling as interkulturele kommunikasie. Die universele kategorieë is meestal so generies dat hulle weinig bydrae tot die beskrywing van die fyner nuanses van lekseme wat tot dieselfde semantiese veld behoort. Daar moet eerder gepoog word om in soverre dit moontlik is 'n instument te ontwikkel wat taal en kultuur spesifiek is. Die kategorieë en kriteria vir die semantiese analise moet verder aan die hand van die brontaal en - kultuur self ontwikkel word. Die navorser moet baie versigtig wees dat sy of haar eie teoretiese voorveronderstellings nie op die ondersoek-instrument afgedruk word nie. In die ondersoek is gevind dat die kulturele dimensie van die leksikale items nie genoegsaam verreken kan word, sonder om die wêreldbeeld te analiseer wat ten grondslag lê van die tekste waarin die leksikale items voorkom nie. Vir die doel is 'n analitiese model ontwikkel. Hierdie buigsame model gebruik 'n stel veranderlikes om die tipiese wêreldbeeld te identifiseer wat ten grondslag lê van 'n bepaalde korpus van tekste. Nadat die onderliggende wêreldbeeld van die boek van Jesaja beskryf is, word die leksikale items in hierdie boek, wat behoort tot die semantiese veld "negatiewe morele gedrag" geanaliseer. Op grond van die resultate word 'n aantal aanbevelings gemaak oor die wyse waarop hierdie items in 'n Hebreeuse leksikon beskryf kan word.

This thesis interrogates the relationship of archaeological models and indigenous understandings of origins in the East Kimberley region of Northern Australia and the Aru Islands of Eastern Indonesia. Archaeological models of prehistoric migration construct these places as part of the same landmass in the recent human period and at times of lower sea levels. Yet, the indigenous groups who currently inhabit these places assert and rely upon their localised understandings of autochthony and mythological creationism. The existence of these competing models has led me to examine the degree to which the practice of archaeology in these locations constructs human prehistory in a way that necessarily disempowers the indigenous cosmology there. Below I examine the construction and content of these different stories about the same place to show how it is that they are essentially competing, conflicting and contradictory claims to truth. I show how each of these asserted cosmological positions emerge from the various cultural systems that sponsor and perpetuate them and I pay special attention to the role of institutionally authorised experts within each of the cosmological positions described. I also seek to demonstrate the ways in which the distribution of expert knowledge plays a core role in a naturalised social order and the ongoing construction of cultural identity in their respective communities. I then interrogate the relationships that these differing forms of knowledge have with each other - paying close attention to the specifics of context in which they are evoked. I conclude that the examination of how these competing claims to truth are distributed in space reveals their influence in the ongoing construction of identity in their respective communities.

The thesis of this study revolves around the validity of Tshivenda literature as an authorative commentary on Mission Work in Venda. The value of literary works by selected Tshivenda writers is explored on three important directions: (a) as a source of information on the Vhavenda world-view which is an important aspect in the Vhavenda's understanding of the Missionary message; (b) as a source of challenge to missiology, and (c) as a source of basis for an in-depth contextual missiology. The well-meaning contributions of the German Missionaries is appreciated. Their influence through the spreading of Lutheranism and also in the birth of Tshivenda literature is clearly recognized. My task has not only been to see these positive contributions, but also to problematise and explore both the missionary instrumentality and the local responses that are reflected in the Tshivenda literature. Our first four chapters introduce the thesis, they cover political history of the Vhavenda which is fundamental in our understanding of their world-view and the early missionary works in Venda. Selected Tshivenda novels become the object of inquiry in the fifth chapter. The novels help us in our evaluation of Missionary Christianity. A wide variety of issues are contained in these novels which are significant in Mission work. The sixth chapter concentrates on selected Tshivenda short stories. In two of these short stories the issue of racism is highlighted. The seventh chapter looks into a few Tshivenda Poems. In two of these poems the Missionary-rejected name for God, Nwali, is heavily used. The last chapter contains the essential commentary of indigenous Tshivenda literature on Missionary Christianity as well as the implications for both global and local Missiology. / Missiology. / M.(Theology)

Adolescents living in the inner-city of Pretoria have their own special challenges that they must face everyday. These challenges entails a poverty context, communities of violence, difficult family circumstances and a developmental phase in which they struggle with their own identity. The focus of this research is to listen to the stories of adolescents that have not being listened to before, concerning HIV/AIDS and their experiences regarding care. These young people is infected and/or affected by HIV/AIDS. The researcher does this research in the Narrative therapeutical paradigm, listening Practical Theologically to the stories of young people infected and/or affected by HIV/AIDS regarding care. Other stories about adolescents and care will also be listened to. The research process is social-constructionally structured. The researcher is searching for a holistic understanding of care from the perspective of young people. Discourses about adolescents, about care, about the inner city and about AIDS will be discussed. Two separate groups of young people participated in the research. The researcher also listened to voices of the Sediba Hope AIDS Care Center about care and about young people. Reflection groups were used, consisting of teenagers and people from the academic community. The researcher used the method of reflection and self reflection throughout the research. Care is described after there were listened to the stories of the young people. The role of an African world-view is described as a resource to understand care holistically. The researcher spent time to reflect on the theological implications of the stories of young people and about the role they must play in the church and in the community. Different care narratives are described as an outcome of the research. Other outcomes are also named and reflected upon. / Thesis (PhD (Practical Theology))--University of Pretoria, 2006. / Practical Theology / unrestricted

The inquiry of this essay is to examine the expression of evil in fantasy literature with a special focus on J.K. Rowlings’ Harry Potter and The Philosopher’s stone and Harry Potter and the Deathly Hallows, but also C.S. Lewis’ Narnia the Lion, the Witch and the Wardrobe, and Narnia the Last Battle. The purpose is to illuminate different depictions of evil in the books and reflect what these depictions can tell us about evil in our contemporary context. With this essay I want to show how world views are present in fantasy literature with a special focus on the portrayal of evil and its significance for the understanding of the narrative. I mean that the understanding and depiction of evil is a universal problem and an existential issue of relevance to world views.

No description available.