Wetlands serve important ecosystem functions such as carbon sequestration but are often affected by disturbances like urban development, agriculture, and road building. For wetlands created to mitigate losses, it is important that the ecosystem functions successfully replicate those of natural wetlands. Created wetlands have frequently not provided these functions due to issues including low organic carbon (OC), high soil bulk density (BD), lost topsoil, incorrect hydrology, and failure of targeted vegetation establishment. Organic matter (OM) amendments help created wetlands attain these functions quicker, but, their long-term effects are seldom reported. This research's purpose was to measure the long-term effects of treatments at a sandy tidal freshwater wetland created in 2003 (WWE) and a fine-textured, non-tidal wetland created in 2002 (CCW). We tested OM treatments, topsoil amendment, and microtopography effects on soil and vegetation properties at WWE and OM treatments at CCW. Pedogenic changes in soil morphology, physical and chemical properties were detected by comparing data to previous studies at these sites. At both sites, litter and biomass parameters were measured to estimate total mass C. Herbaceous biomass was measured at WWE. At WWE, no long-term OM treatment effects from 78 or 156 Mg ha-1 were observed. Soils in pits had higher OC, lower BD, and lower chroma than soils on mounds. Sandy and loamy HSFI's developed at WWE within four years, but there were fewer sandy indicators after 12 years. Loamy HSFI's were lost at CCW from 2003 to 2016. Plots at WWE that were amended with topsoil had higher soil mass C than the sandy soil due to a finer texture, but total mass C did not vary. At CCW, long-term OM treatment effects were observed, including lower BD, higher soil mass C, and higher tree mass C with increasing compost rates up to 224 Mg ha-1. Overall, the ideal compost loading rate for constructed wetlands varied with wetland type and mitigation goals. Compost rates of 112 Mg ha-1 are sufficient for short term establishment of wetland vegetation and hydric soil properties, but higher rates near 224 Mg ha-1 may be required for effects that last over 10 years. / Ph. D. / Wetlands are unique habitats that provide environmental benefits such as carbon storage but are often negatively affected by human disturbances such as urban development and road construction. When wetlands are constructed to mitigate natural wetland losses, it is important that they successfully provide the benefits of the wetlands they replace. Created wetlands have frequently not functioned like natural wetlands due to soil issues including low organic carbon (OC) and high soil density (BD). Organic matter (OM) amendments such as composted yard waste help created wetlands attain these functions quickly after construction compared to unamnded wetlands. The purpose of this study was to measure long-term (greater than 10 years) effects of OM treatments on soil and vegetation properties at two different created wetlands. The two wetlands were a sandy tidal freshwater wetland created in 2003 (WWE) and a fine-textured, compacted, non-tidal wetland created in 2002 (CCW). Previous soil data were compared to recent soil samples to detect changes in physical and chemical soil properties over time. At WWE, soils in pits accumulated more OM, were higher in carbon, lower in BD, and had greyer color than soils in mounds. Hydric soil field indicators developed from upland soil within four years after construction at WWE. There were no long term compost effects on soil properties compared to a fertilized control, but the compost rates used were low compared to other recommendations, and the wetland was constructed carefully to avoid compaction. There were much higher rates of compost applied at CCW, which produced lower BD, higher soil mass C, and higher tree biomass. We recommend applying OM and avoiding compaction during wetland construction. Ideal OM loading rate depends on wetland type (soil texture, hydrology) and mitigation goals. In the fine-textured, compacted wetland studied here, compost rates of 112 Mg ha⁻¹ are ideal for short term establishment of wetland vegetation and soil properties, but higher rates near 224 Mg ha⁻¹ may be required for long term effects.

Les forêts tropicales constituent le principal réservoir de biodiversité et de carbone (C). Cependant, la plupart des forêts tropicales, en particulier les forêts de Bornéo en Asie du Sud-Est, subissent une pression intense et sont menacées par des activités anthropiques telles que l'exploitation forestière, l'industrie minière l’agriculture et la conversion en plantations industrielles. En 2010, la superficie des forêts de production de Bornéo était de 26,8 millions d’ha (environ 36% de la superficie totale de l’île, dont 18 millions ha (environ 24%) déjà exploités. Par conséquent, les forêts de production occupent donc une place importante à Bornéo et jouent un rôle essentiel dans la compensation des biens fournis et la maintenance des services écosystémiques, tels que la conservation du C et de la biodiversité.L’exploitation sélective réduit la biomasse aérienne et souterraine par l’élimination de quelques grands arbres, et augmente les stocks de bois mort par des dommages collatéraux. En créant des trouées dans la canopée, le microclimat dans les sous-étages et au sol change localement et accélèrent la décomposition de la litière et de la matière organique. L'importance des dégâts, de l'ouverture de la canopée et de la rapidité du rétablissement du C s'est avéré principalement liée à l'intensité de l'exploitation forestière. Cependant, les évaluations empiriques de l'effet à long terme de l'intensité de l'exploitation forestière sur l'équilibre du C dans les forêts de production restent rares.La présente thèse se concentre principalement sur l'évaluation de l'effet à long terme de l'intensité de l'exploitation forestière sur la séquestration de carbone dans une forêt à Diptérocarpées de Nord Bornéo (District de Malinau, Kalimantan Nord) exploitée en 1999/2000. Cinq principaux réservoirs de C, à savoir le C aérien dans les arbres vivants (AGC), le C souterrain dans les arbres vivants (BGC), le bois mort, la litière et le C organique du sol (SOC) ont été estimés le long d’un gradient d'intensité d'exploitation (0-57% de la biomasse perdue).Nos résultats ont montré que les stocks totaux de C, 16 ans après l'exploitation, variaient de 218 à 554 Mg C ha-1 avec une moyenne de 314 Mg C ha-1. Une différence de 95 Mg C ha-1 a été observée entre une faible intensité d'exploitation forestière (<2,1% de la biomasse initiale perdue) et une intensité d'exploitation élevée (>19%). La plus grande partie du C (environ 77%) était présente dans les arbres vivants, suivie par les stocks du sol (15%), les stocks de bois mort (6%) et une fraction mineure des stocks de litière (1%). L'empreinte de l'intensité de l'exploitation forestière était encore détectable 16 ans après l'exploitation et a été le principal facteur expliquant la réduction des AGC>20, BGC>20, du bois mort et des stocks de C et une augmentation du bois mort. L'intensité de l'exploitation expliquait à elle seule 61%, 63%, 38% et 48% des variations des AGC>20, BGC>20, du bois mort et des stocks de C totaux, respectivement. L'intensité de l'abattage a également réduit considérablement les stocks de SOC dans la couche supérieure de 30 cm. Pour l'ensemble des stocks de SOC (0-100 cm), l'influence de l'intensité de l'exploitation était encore perceptible, en conjonction avec d'autres variables.Nos résultats quantifient l'effet à long terme de l'exploitation forestière sur les stocks de C forestier, en particulier sur les AGC et les bois morts. L'intensité élevée de l'exploitation forestière (réduction de 50% de la biomasse initiale) a réduit les stocks totaux de C de 27%. La récupération de l'AGC était plus faible dans les parcelles d'intensité d'exploitation forestière élevée, ce qui suggère une résilience plus faible de la forêt à l'exploitation forestière. Par conséquent, une intensité d'exploitation forestière inférieure à 20%, devrait être envisagé afin de limiter l'effet à long terme sur les AGC et le bois mort. / Tropical forests are a major reservoir of biodiversity and carbon (C), playing a pivotal role in global ecosystem function and climate regulation. However, most of the tropical forests, especially Bornean forests in Southeast Asia, are under intense pressure and threatened by anthropogenic activities such as logging, mining industry, agriculture and conversion to industrial plantation. In 2010, the area of production forests in Borneo was 26.8 million ha (approx. 36% of the total land area of Borneo) including 18 million ha (approx. 24%) of logged forests. Production forests are thus emerging as a dominant land-use, playing a crucial role in trading-off provision of goods and maintenance of ecosystem services, such as C and biodiversity retention.Selective logging is known to reduce both above- and below-ground biomass through the removal of a few large trees, while increasing deadwood stocks through collateral damages. By creating large gaps in the canopy, microclimates in the understory and on the forest floor change locally speeding up the decomposition of litter and organic matter. The extent of incidental damages, canopy openness, as well as the speed of C recovery, was shown to be primarily related to logging intensity. However, empirical evaluations of the long-term effect of logging intensity on C balance in production forests remain rare.The present thesis aims to assess the long-term effect of logging intensity on C sequestration in a north Bornean Dipterocarp forests (Malinau District, North Kalimantan) logged in 1999/2000. Five main C pools, namely above-ground (AGC) and below-ground (BGC) carbon in living trees, deadwood, litter, and soil organic carbon (SOC) were estimated along a logging intensity gradient (ranging from 0 to 57% of initial biomass removed).Our result showed that total C stocks 16 years after logging, ranged from 218-554 Mg C ha-1 with an average of 314 Mg C ha-1. A difference of 95 Mg C ha-1 was found between low logging intensity (<2.1% of initial biomass lost) and high logging intensity (>19%). Most C (approx. 77%) was found in living trees, followed by soil (15%), deadwood (6%), and a minor fraction in litter (1%). The imprint of logging intensity was still detectable 16 years after logging, and logging intensity thus was the main driver explaining the reduction of AGC>20, BGC>20, deadwood, and total C stocks and an increase in deadwood. Solely, logging intensity explained 61%, 63%, 38%, and 48% of variations of AGC>20, BGC>20, deadwood, and total C stocks, respectively. Logging intensity also significantly reduced SOC stocks in the upper 30 cm layer. For total SOC stocks (0-100 cm), the negative influence of logging intensity was still perceptible, being significant in conjunction with other variables.Our results quantify the long-term effect of logging on forest C stocks, especially on AGC and deadwood. High logging intensity (50% reduction of initial biomass) reduced total C stocks by 27%. AGC recovery was lower in high logging intensity plots, suggesting lowered forest resilience to logging. Our study showed that maintaining logging intensity, below 20% of the initial biomass, limit the long-term effect of logging on AGC and deadwood stocks.

This thesis explores gender-related barriers in CEO successions. Only 4% of Fortune 500 CEOs are female despite the fact that women have held the majority of college degrees in the US since the late 1990's and now comprise almost half of the workforce and the majority of managerial positions. Their representation is low even in comparison to the other two top management positions from which CEOs are typically sourced. It is less than one-third of the percentage of both female executive officers (15%) and board directors (17%). A holistic and qualitative research approach was utilized. Data were gathered on societal, individual and organizational factors through one-on-one, semi-structured interviews with board directors, executive search consultants and female CEOs, and analyzed using computer-assisted coding software. This thesis challenges the perception that women's individual barriers are the main reason why there are so few female CEOs. While all three types of barriers were found, organizational barriers appear to be the most important. The convergence of predominately male board directors, CEOs and top executive search consultants with informal, subjective, secretive and disparate talent management and CEO successions programs effectively results in the CEO position being a better fit for men than women. While moderating factors were beneficial to the women who have become CEOs, many factors were found for why they cannot be relied upon to greatly increase the number of female CEOs. A deliberate and comprehensive effort by society, individuals and organizations is required.

Aboveground and belowground ectomycorrhizal (ECM) communities associated with different age classes of the exotic plantation species Pinus radiata were investigated over the course of two years in the North Island of New Zealand. ECM species were identified with a combined approach of morphological and molecular (restriction fragment length polymorphism (RFLP) and DNA sequencing) analysis. ECM species richness and diversity of a nursery in Rotorua, and stands of different ages (1, 2, 8, 15 and 26 yrs of age at time of final assessment) in Kaingaroa Forest, were assessed above- and belowground; furthermore, the correlation between the above- and belowground ECM communities was assessed. It was found that the overall and stand specific species richness and diversity of ECM fungi associated with the exotic host tree in New Zealand were low compared to similar forests in the Northern Hemisphere but similar to other exotic plantations in the Southern Hemisphere. Over the course of this study, 18 ECM species were observed aboveground and 19 ECM species belowground. With the aid of molecular analysis the identities of Laccaria proxima and Inocybe sindonia were clarified. In the aboveground study, five species were found associated with P. radiata that were previously not reported with this host in New Zealand (Inocybe sindonia, Lactarius rufus, Lycoperdon gunii, Rhizopogon pseudoroseolus and Wilcoxina mikolae). Belowground, the species Psudotomentella sp., P. tristis, R. luteorubescens, Tomentella sp., Wilcoxina mikolae were found as new associates of P. radiata in New Zealand, additionally nine ECM types were found that could not be identified with molecular analysis. There was little correlation between the species fruiting and the species colonising root tips. Only seven species were found in common between the above- and belowground communities, furthermore the dominant species aboveground were not observed in the belowground ECM communities. The influence of host age on the above- and belowground ECM communities of different age classes of P. radiata plantations was investigated. The aboveground species richness increased from the nursery to the oldest age group investigated (26 yrs), while diversity increased to the 15 yr old age group and decreased slightly to the oldest stand. A clear sequence of ECM species changes was observed to be related to stand age with a growing complexity over the chronosequence. The belowground ECM communities showed a different picture and richness and diversity initially decreased from the nursery to the outplanting but increased thereafter. Belowground no change in ECM composition that was directly related to the age of the host was observed, but two distinct groups of ECM species were found – a 'young' and a 'plantation forest' group, with the respective discriminating species being Rhizopogon rubescens and Type unknown Basidiomycete/Amanita muscaria. Another aspect of the study was the fate of the nursery ECM species in the outplanting and the arrival of non-nursery species. The ECM communities of seedlings in the nursery were investigated in 2006 and these seedlings were followed up over eight assessments in the field for one year, furthermore data from the 1-, 2 and 8 yr old plantation stands was analysed. It was found that the nursery species do survive the first year of outplanting and are dominant in the first year. The first non-nursery species occurred six months after outplanting but was only in minor abundance. Nursery ECM were dominant for two years after the seedlings were planted, and were completely replaced after seven years. Rhizopogon rubescens was found to be the most persistent and dominant species in the outplanting, facilitating the successful establishment of the seedlings in the plantation forest.

The aim of this study was fourfold. Firstly the nature of training for Foundation Phase student teachers in Life Skills had to be determined. Secondly, the outcomes for Life Skills training for Foundation Phase student teachers had to be ascertained. Thirdly, effective teaching-learning methods for training had to be identified to achieve outcomes in the most effective way. New methods of presentation and assessment had to be exploited to address the new challenge of reduced contact time. Lastly, the nature of Life Skills training at other higher teaching institutions in South Africa had to be determined so that general outcomes and guidelines for effective training of Foundation Phase student teachers in Life Skills could be established. A literature study was done to determine the nature of Life Skills for Foundation Phase student teachers. Four outcomes were identified were identified from this study, namely health promotion, promotion of the environment, development of human potential and the promotion of moral, cultural and religious values as main components of Life Skills. In addition a literature study was done on effective teaching-learning methods which should be applied to ensure effective Life Skills training for student teachers. The four most important components or essential features that should be considered during the facilitation of Life Skills for Foundation Phase student teachers, namely the lecturer, student, learning environment as well as the aim of teaching, including teaching content and assessment were set out. After questionnaires regarding the nature of training for Foundation Phase student teachers in Life Skills were sent to institutions for higher education and the responses were statistically analysed, it was possible to make a number of findings and recommendations. From the empirical research it became clear that the identified outcomes were also valued and applied by lecturers at other institutions for higher education. Furthermore, it became apparent that active teaching learning-methods and self-regulated learning are valued as important aspects of effective teacher training. Skills should not only be practised during contact sessions, but learning environments should be extended. It should include a variety of contexts like community service, practical teaching experience at schools under supervision of mentors as well exposure to diverse and multicultural teaching learning-environments. By effective planning and organising, it is possible for lecturers to guide students to become self regulated and effective learners within the context of reduced contact time. / Thesis (M. Ed.)--North-West University, Potchefstroom Campus, 2005.

Les travaux de recherche présentés dans cette thèse consistent principalement en la conception de fonctions intégrées radiofréquences BiCMOS SiGe exploitant des résonateurs à ondes acoustiques de volume FBAR. Contrairement aux techniques actuelles rencontrées dans l'industrie qui consistent à réaliser des filtres et des résonateurs discrets et à les associer par la suite avec les circuits actifs des émetteurs-récepteurs au niveau du boîtier, nos résonateurs sont directement réalisés sur le substrat silicium des circuits actifs RF par une technique appelée intégration " above-IC ". Avec cette méthode d'intégration, les parasites et la modélisation associés aux microsoudures (Wire Bonding) sont éliminés. Elle permet aussi de se passer des circuits d'interface et d'adaptation nécessaires dans le cas de filtres RF discrets. Ceci permet de réduire considérablement la consommation et le volume des systèmes. Des amplificateurs faible bruit filtrants et des oscillateurs visant le standard WLAN IEEE 802.11a ont ainsi été implantés en utilisant cette technique d'intégration "above IC". Les circuits obtenus sont très compacts, et leurs performances, notamment celles des oscillateurs, sont à l'état de l'art. Par ailleurs, des amplificateurs faible bruit et des VCO LC SiGe intégrés pour application WLAN 5GHz sont également présentés et leurs techniques d'optimisation sont données.

The aim of this study was fourfold. Firstly the nature of training for Foundation Phase student teachers in Life Skills had to be determined. Secondly, the outcomes for Life Skills training for Foundation Phase student teachers had to be ascertained. Thirdly, effective teaching-learning methods for training had to be identified to achieve outcomes in the most effective way. New methods of presentation and assessment had to be exploited to address the new challenge of reduced contact time. Lastly, the nature of Life Skills training at other higher teaching institutions in South Africa had to be determined so that general outcomes and guidelines for effective training of Foundation Phase student teachers in Life Skills could be established. A literature study was done to determine the nature of Life Skills for Foundation Phase student teachers. Four outcomes were identified were identified from this study, namely health promotion, promotion of the environment, development of human potential and the promotion of moral, cultural and religious values as main components of Life Skills. In addition a literature study was done on effective teaching-learning methods which should be applied to ensure effective Life Skills training for student teachers. The four most important components or essential features that should be considered during the facilitation of Life Skills for Foundation Phase student teachers, namely the lecturer, student, learning environment as well as the aim of teaching, including teaching content and assessment were set out. After questionnaires regarding the nature of training for Foundation Phase student teachers in Life Skills were sent to institutions for higher education and the responses were statistically analysed, it was possible to make a number of findings and recommendations. From the empirical research it became clear that the identified outcomes were also valued and applied by lecturers at other institutions for higher education. Furthermore, it became apparent that active teaching learning-methods and self-regulated learning are valued as important aspects of effective teacher training. Skills should not only be practised during contact sessions, but learning environments should be extended. It should include a variety of contexts like community service, practical teaching experience at schools under supervision of mentors as well exposure to diverse and multicultural teaching learning-environments. By effective planning and organising, it is possible for lecturers to guide students to become self regulated and effective learners within the context of reduced contact time. / Thesis (M. Ed.)--North-West University, Potchefstroom Campus, 2005.

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Intertextuality as a method of biblical interpretations is well known and often misused in theological circles. This thesis critically describes how intertextuality is used and what are the main issues with this term and method. The main conclusion is that intertextuality as the modern method is for no much use in biblical hermeneutics though it can be used as an old and well know method of source theory. Intertextuality in the modern view appears to be as a confusing and an unstable term. Philosophical presuppositions of a modern hermeneutics might lead to self-contradictory conclusions. It is not that the attempt to come to original meaning is fulfilled through new interpretational methods, but anyone can introduce any new meaning to old texts. This work shows that the reasons to believe in the death of the original meaning is based on shaky and uncertain grounds. The main concern of this work is introductory citation of the Gospel of Mark. It shows that Mark bases his high Christological understanding on the prophecy of Isaiah and Malachi. Though Mark's Gospel is often considered as the earliest manuscript containing non-high Christological notion, this work shows that Mark from the very beginning introduced us to Jesus who possesses the same qualities as the Yahweh in the books of Isaiah and...