Growth, mortality, production, spat collection, seasonal cycles of condition index, biochemical composition, carrying capacity of commercial raft culture systems and population genetic characteristics of blue mussel (Mytilus edulis) were studied at different sites in Loch Etive and Loch Kishorn on the west coast of Scotland between May 1993 and May 1995. The main objective of the study was to evaluate current suspended mussel culture production in raft systems and to obtain basic information on the biology and the genetic structure of the two mussel populations in the lochs. There were some water quality differences between the sites in relation to seston, salinity and transparency but not to temperature, particulate organic matter and chlorophylla. When food is available (as particulate organic matter and chlorophyll-a), there was a clear seasonal cycle in mussel somatic growth and shell growth. Mussel growth was relatively high from mid-spring until late autumn, but very slow during the rest of the year. The spring-summer period of rapid shell length and somatic growth coincided with relatively optimum environmental conditions and positive relationships were indicated between growth rates, temperature and salinity, indicating the limiting effect of these two primary factors on growth from late-autumn to mid-spring when there is also a lack of available food. Mussel growth was higher at 2m depth on the raft-rope systems, but in lantern nets experimental growth did not show differences between depths. Growth was found to be similar in the lantern nets and on culture ropes in the two lochs in the first year of experiments (from May 1993 to May 1994). Overall, mean length increments were 31.01mm in Loch Etive and 28.75mm in Loch Kishorn over a 15 month period. The mussels reached marketable size (>50mm) in two years from the known time of spat settlement. A cross-transplantation experiment showed that site rather than stock is the main factor explaining differences in mussel growth in Loch Etive and Loch Kishorn. The position of the mussels within a raft has a significant effect on their growth; mussels at the inflow of a raft have a better growth than those near the outflow (p<0.05) due to greater availability of food. Mean mussel biomass was higher in Loch Kishorn while production was higher in Loch Etive, but there were seasonal and monthly fluctuations in both biomass and production at both sites. Biochemical composition and energy content were similar in both sites, while mussel meat yield and condition indices were significantly higher in Loch Kishom than Loch Etive. Meat content, condition index and carbohydrate values were high during the summer and low from autumn to spring, reaching minimum values in March and April at the time of spawning. Spat settlement occurred in June-July in Loch Etive and June-December in Loch Kishorn. Sea squirt, starfish and eider duck are problems effecting spat collection at the Loch Kishorn site, whereas spat collection in Loch Etive is unaffected by these pests/predators. The carrying capacities for cultured mussels were found to be about 24 metric tons per raft for Loch Etive and 38 metric tons per raft for Loch Kishorn using a particulate organic matter based model; these are reasonable estimates in comparison to the known mussel production levels reported by producers. However, a seston-based model gave an overestimate of carrying capacity for both sites. Cross-transplantation of mussels, electrophoresis and shell morphological measurements showed significant differences between the Loch Etive and Loch Kishorn mussel populations. Mortality rates were higher in transplanted mussels than in the native mussels (p<0.001).

In this thesis, I am examining how a small branch of the Society for Creative Anachronism, Loch an Fhraoich, whose values and identity center around camaraderie and narrative and aesthetic coherence, attempts to balance these two often contradictory principles. To better illustrate the negotiations taking place, I have used ethnographic fieldwork to focus on the areas of material culture, ethno-kinetics, persona, knowledge, and events. These areas are tightly interwoven, and almost never operate independently, but the exercise of isolating them is useful in seeing the complexities of choices that members must make to navigate the social world of the Society for Creative Anachronism. The Society for Creative Anachronism is a large, international non-profit organization and is often depicted and discussed as a large homogeneous organization. Instead, in this work I have analyzed the smaller group within the larger organization. I have focused on the smaller group in order to bring to light new details of how this group and the individual members operate within a self-selected international organization in a network of personal connections. These groups attain a feeling of distinctness within this large organization by creating an identity for themselves, which expresses their values within the larger SCA framework. Sometimes these values contradict each other or subvert the larger overriding SCA ethos, and members will mediate their participation in order to avoid breaking from the SCA framework entirely while still protecting their group identity. This can be examined in light of narrative construction and maintenance. The Society for Creative Anachronism supports an official homogenous metanarrative. It is this narrative that is most often heard and examined by outsiders. Despite the initial perceived dominance, this metanarrative acts as a frame or matrix narrative, and contained within are multiple hyponarratives and little narratives. As one allows their view to slip further towards the idio and unicultural level, these hyponarratives increase in number while decreasing in scope. They go from representing a kingdom, to principality, to a barony, to a shire, to a group of friends within that shire to an individual member. At every level these narratives connect the individual and group to others, creating a network of relationships and shared narratives that help create a sense of unity and prevent a fracturing of voices and thus support the overriding metanarrative. In order to prevent this system from collapsing inward or fracturing apart, a certain amount of playful transgressive metalepsis and edgeplay must be allowed. The negotiation of this edgeplay is debated, and the style and amount tolerated is often a distinguishing mark between groups. Some key contestations that I have focussed on where this debate occurs include the levels and types of anachronism allowed, the types of partying and practical jokes encouraged or discouraged, gender, media influence, and the understanding of honor and chivalry.

Univ., FB Rechtswiss., Diss.--Hamburg, 2004. / Literaturverz. S. 343 - 365.

No / The loch-side settlement of Druim nan Dearcag has been shown by excavation to date to the 16th-17th centuries AD, when it formed part of a dispersed settlement pattern in north-west North Uist. Elements of this settlement system were subsequently truncated by ridge-and-furrow cultivation associated with the cleared township or 'baile' of Foshigarry. The site produced rare structural and artefactual evidence for this period of Hebridean history and may help shed some light on the development of settlement patterns, house types and land use in the late medieval and post-medieval periods.

In dieser Arbeit werden verschiedene Entwicklungsmodelle des Menschen vorgestellt und in ihrem Gebrauch in und für die Pädagogik kritisch reflektiert. Zunächst werden Vorüberlegungen zur Etymologie und Systematik der Begriffe Entwicklung (zwischen Natur und Kultur) und Modell (gegenüber Theorie, Simulation und Schema) angestellt. Anhand des Gangs von Beispiel zu Beispiel (Günther Buck) werden jeweils die Entwicklungsmodelle des Menschen von Rudolf Steiner, Maria Montessori, Jean Piaget, Lawrence Kohlberg, Erik Erikson und Werner Loch kritisch dargestellt und problematisiert. Es schließen sich bildungs- und erziehungstheoretische Überlegungen an, wie das Phänomen der Entwicklung heute in angemessener Weise behandelt werden kann. Anhand der dargestellten Modelle zeigt sich, dass nur ein von absoluter Teleologie und Linearität befreiter Entwicklungsbegriff mit modernen Vorstellungen pädagogischer Anthropologie und Ethik kompatibel sein kann. Deswegen können Entwicklungsmodelle lediglich eine veranschaulichende oder regulierende Funktion ausüben. Sie stehen jedoch so zumeist im Widerspruch zu den grundlegenden Momenten der freien Bildsamkeit und Mitbestimmung des Einzelnen im Erziehungsprozess. Eine Rehabilitation des Entwicklungsdenkens erweist sich dennoch als sinnvoll, da dieser in der Lage ist, auf die komplexe Genealogie menschlichen Lebens und die Möglichkeiten und Grenzen pädagogischer Einsätze zu verweisen. / The issue of developmental models of human beings and their implementation in both pedagogical practice and theory are critically reflected within this thesis. In the beginning, preliminary considerations of the etymology and systematization of development (between nature and nurture) and model (as opposed to theory, simulation, scheme) are framed. Based on Günther Bucks''s approach (from „Beispiel“ to „Beispiel“) several developmental models by Rudolf Steiner, Maria Montessori, Jean Piaget, Lawrence Kohlberg, Erik Erikson and Werner Loch are critically examined. Subsequently, considerations on addressing the phenomenon of development from the perspective of education theory and „Bildung“ in an appropriate contemporary way are given expression. On the basis of the outlined models it is depicted that only a concept of development that is exempt from absolute teleology and linearity can be compatible with modern ideas of educational anthropology and ethics. Hence, developmental models may only serve visualizing and regulating purposes. They often contradict fundamental principles such as „Bildsamkeit“ (the ability and necessity of self-forming) and participation within the process of education. Nevertheless, the rehabilitation of development thinking proves beneficial due to its ability to indicate the complex genealogy of human life and the opportunities as well as limitations of pedagogical actions.

Orogenic gold deposits occur within metamorphic belts throughout the world and have through time represented the source for over 25% of the world’s gold production. Although orogenic gold deposits are of great economic importance, controversies exist on the subject of fluid and metal sources and there have been few studies of gold´s distribution and mobility outside of large economic deposits. Research made by Pitcairn et al. (2006), on the Mesozoic Otago and Alpine schists of New Zealand, observed systematic depletion of Au and a suite of 6 associated elements with increasing metamorphic grade. This depletion was identical to the suite of elements enriched in the Otago gold deposits and provided strong evidence that orogenic gold deposits form due to metamorphic processes. The mobilization of metals was attributed to the recrystallization of sulfide minerals during prograde metamorphism causing dehydration and release of metal-rich metamorphic fluids.  This thesis is part of a larger project aimed at testing the “Otago model” in a classic metamorphic terrain: The Dalradian metamorphic belt of Scotland. Rocks in the study are from the southern higlands group and the Appin and Argyll group which range in metamorphic grade from chlorite zone greenschist facies to sillimanite zone amphibolite facies. Three main aspects, which supplement earlier research, are addressed in this study: 1) Investigation of the sulfide paragenesis at Loch Lomond and Stonehaven was carried out to map the evolution of sulfides with metamorphic grade and the possible relations to the distribution of gold. Using SEM scanning to quantify the abundance of different sulfide minerals together with previous data on the Glen Esk region, a complex sulfide evolution pattern for the Dalradian Supergroup is identified. The sulfide evolution describes the same changes in texture and chemistry as observed in the Otago Schists but is made complex by the difference in geological evolution for the different regions. 2) Reinvestigation of the higher grade zones of Glen Esk (staurolite to sillimanite) was carried out as samples from the previous study were very weathered. Results from ultralow detection limit methods (HG-AFS and a gold detection method developed by Pitcairn et al. 2006) showed significant systematic depletion of Au and As with metamorphic grade. From chlorite to sillimanite zone average values of Au and As were showed to decrease by 65% and 88% respectively. Furthermore, a suite of 10 major and 12 trace elements were analyzed using ICP methods showing no trends of systematic depletion with increased metamorphic grade.  3) Investigation of Pb-Ag Veining and vein samples from each of the metamorphic index mineral zones in the Glen Esk area was carried out to identify fluid composition and ore mineralogy. Using microthermometry and Raman laser spectroscopy two distinct fluids were identified. The first type is a H2O-CO2-N2-salt fluid of low salinity (0-15 weight percent NaCl equivalent) and medium temperature (150 to 250 °C) locally containing minor amounts of CH4. It is found in the veins from the mineral index zones of Glen Esk and was formed in the ductile regime most likely related to late stage metamorphic devolatilization released during Caledonian uplift of the Dalradian. Pb-Ag veins from the locality of Hardhill host the second fluid type which was formed in the brittle regime  accompanied by brecciation as a high salinity (15 to 20 weight percent NaCl equivalent) low temperature (70-140°C) H2O-salt fluid with calcic composition was precipitated. This fluid bears much resemblance to Carboniferous calcic brines responsible for economic base-metal precipitation with widespread occurrence in southwest Scotland and Northern Ireland. Results of this thesis show many similarities with the Otago study, with a connection between metal mobility and metamorphic grade, providing support for the dehydration model as a viable mechanism for the generation of orogenic gold deposits.

No description available.

This study investigated bird distributions in relation to local habitat and landscape pattern and the implications which habitat fragmentation may have for woodland birds. There were two sections to the research: an experimental study investigating bird gap crossing behaviour across distances of five to 120m; and an observational study modelling woodland bird distributions in relation to local habitat and landscape scale variables in two study areas (East Loch Lomond and the Central Scotland Forest). In the experimental study it was hypothesised that bird willingness to cross gaps will decrease with increasing gap distance even at home-range scales and that the rate of decline will vary interspecifically in relation to bird morphology. Song thrush mobbing calls played at woodland edges in the West of Scotland were used to attract birds across gaps and results were compared with the response along woodland edges. Data were obtained for four species: chaffinch, coal tit, robin and goldcrest. The decline in response with distance across gaps and along woodland edge was modelled for each species using generalized linear modelling. Maximum gap crossing distances ranged from 46m (goldcrest) to 150m (extrapolated value for the chaffinch). Goldcrests responded more readily through woodlands. There was no difference between woodland edge and gap response for the coal tit. Robins and chaffinches however responded more readily across gaps than through woodland. When different response indices were plotted against bird mass and wing area, results suggested that larger birds with bigger wings responded more readily across gaps than through woodland. It is suggested that this relates to differences in bird manoeuvrability within woodlands and ability to evade a predator in gaps. Fragmentation indices were calculated for an area of the Central Scotland Forest to show how willingness to cross different gap distances influences perception of how fragmented the woodlands are in a region. Results are discussed in the context of the creation of Forest Habitat Networks. The data for the observational section of the work was from bird point counts for 200 sample points at East Loch Lomond in 1998 and 2000 and 267 sample points in the Central Scotland Forest in 1999. In addition a time series of point count data was available for 30 sample points at East Loch Lomond. Additional data was gathered for ten sample points (1998) and two sample points (2000) at East Loch Lomond to investigate effects of observer, time and weather on count data. Generalized linear and generalized additive modelling was carried out on these additional data. Results indicated that biases due to the variation in time and weather conditions between counts existed in the pure count data but that these were eliminated by reducing data to presence and absence form for analysis. Species accumulation curves indicated that two counts per sample point were insufficient to determine species richness. However a sufficiently large proportion of the species was being detected consistently in two counts of ten minutes duration for it to be valid to model them in relation to habitat and landscape variables. Point count data for East Loch Lomond in 1998 (ELL98) and the Central Scotland Forest in 1999 (CSF99) for the wren, treecreeper, garden warbler, robin, blue tit, blackbird, willow warbler, coal tit, goldcrest, great tit, and song thrush were analysed using generalized additive modelling. In addition models were built for the blackcap (CSF99) and the siskin, redstart and wood warbler (ELL98). Where all relationships were identified as linear, models were rebuilt as GLMs. Models were evaluated using the Area Under the Curve (AUC) of Receiver Operating Characteristic (ROC) plots. AUC values ranged from 0.84-0.99 for ELL98 and from 0.76-0.93 for CSF99 indicating high predictive accuracy. Habitat variables accounted for the largest proportion of explained variation in all models and could be interpreted in terms of bird nesting and feeding behaviour. However additional variation was explained by landscape scale and fragmentation related (especially edge) variables. ELL98 models were used to predict bird distributions for Loch Lomond in 2000 (ELL00) and for the CSF99. Likewise the CSF99 models were used to predict distributions for ELL98 and ELL00. Predicted distributions had useful application in many cases within the ELL site between years. Fewer cases of useful application arose for predicting distributions between sites. Results are discussed in the context of the generality of bird environment relationships and reasons for low predictive accuracy when models are applied between sites and years. Models which had useful application for ELL00 were used to predict bird distributions for 2025 and 2050 at East Loch Lomond. Habitat and landscape changes were projected based on the proposed management for the site. Since woodland regeneration rates are difficult to predict, two scenarios were modelled, one assuming a modest amount of regeneration and one assuming no regeneration. Predictions derived from the ELL98 models showed broad-leaved species increasing in distribution while coniferous species declined. This was in keeping with the expected changes in the relative extent of broad-leaved and coniferous habitat. However, predictions from the CSF99 models were often less readily explicable. The value of the modelling approach is discussed and suggestions are made for further study to improve confidence in the predictions.

Zusammenfassung In den letzten Jahren haben Schwarze Löcher viel Aufmerksamkeit auf sich gezogen, insbesondere wegen ihrer ungewöhlichen quantentheoretischen Eigenschaften. Ein in diesem Zusammenhang interessantes Modell ist das geeichte SL(2,R)/U(1)-Wess-Zumino-Novikov-Witten-Modell, das im Rahmen der Stringtheorie als Euklidisches zweidimensionales Schwarzes Loch interpretiert werden kann. Die vorliegende Arbeit analysiert die klassischen Eigenschaften dieses Modells, um so die Grundlage für quantentheoretische Untersuchungen zu schaffen. Ausgangspunkt ist eine allgemeine Betrachtung über geeichte Wess-Zumino-Novikov-Witten-Modelle (WZNW-Modelle). Herkömmlicherweise werden sie mit Hilfe von Eichfeldern formuliert, deren Bewegungsgleichungen rein algebraisch sind. In der vorliegenden Arbeit werden die Eichfelder aus den Modellen eliminiert. Dabei entsteht eine Klasse von nichtlinearen integrablen konformen Feldtheorien, für deren Bewegungsgleichung eine explizite Lax-Paar-Darstellung abgeleitet wird. Diese Ergebnisse werden auf das geeichte SL(2,R)/U(1)-WZNW-Modell spezialisiert. Zum Vergleich wird auch die Eliminierung des Eichfeldes durch explizite Pfadintegration untersucht, die jedoch aufgrund mathematischer Ambiguitäten nicht zu einem abschließenden Ergebnis geführt wird. Das klassische geeichte SL(2,R)/U(1)-WZNW-Modell wird sowohl in einem unendlich ausgedehnten Minkowski-Raum als auch mit räumlich periodischen Randbedingungen untersucht. Letzteres ist für die stringtheoretische Interpretation des Modells wichtig. Es werden die nichtlinearen Bewegungsgleichungen und ihre allgemeine Lösung angegeben. Diese enthält Parameterfunktionen. Es wird ein Verfahren abgeleitet, um die Parameterfunktionen aus vorgegebenen Anfangsbedingungen zu bestimmen. Mit Hilfe dieses Verfahrens werden die Poissonklammern der Parameterfunktionen aus den kanonischen Poissonklammern der physikalischen Felder berechnet. Es wird gezeigt, daß es eine nichtlokale kanonische Transformation der nichtlinearen physikalischen Felder auf freie Felder gibt. Die entsprechende Bäcklund-Transformation wird angegeben. / Abstract In recent years, Black Holes have attracted much attention, in particular, because of their unusual quantum-theoretical properties. An interesting model, in this context, is the SL(2,R)/U(1) gauged Wess-Zumino-Novikov-Witten model, which can be interpreted stringtheoretically as Euclidean two-dimensional Black Hole. The present dissertation analyzes the classical properties of this model, in order to prepare the basis for quantum-theoretical investigations. First, gauged Wess-Zumino-Novikov-Witten (WZNW) models are intoduced in general. Usually, they are formulated including gauge fields, whose equations of motion are purely algebraic. In the present dissertation, the gauge fields are eliminated from the models. A class of non-linear integrable field theories arises, whose equations of motion can be represented by Lax pairs explicitly. These results are specialized to the SL(2,R)/U(1) gauged WZNW model. For comparison, the elimination of the gauge field by explicit path integration is also investigated. But due to mathematical ambiguities, this investigation does not lead to a final result. The classical SL(2,R)/U(1) gauged WZNW model is investigated in an infinitely extended Minkowski space-time as well as with spatially periodic boundary conditions. The latter is important for the stringtheoretical interpretation of the model. The non-linear equations of motion and their general solution are given. A procedure is derived to determine the parameter functions of the general solution from given initial conditions of the equations of motion. By means of this procedure the Poisson brackets of the parameter functions are calculated from the canonical Poisson brackets of the physical fields. It is shown that there is a non-local canonical transformation of the non-linear physical fields onto free fields. The corresponding Backlund transformation is presented.

Diese Dissertation besteht aus zwei Teilen von Studien. Der erste Teil demonstriert die Steuerung der Elektron-Kern-Spin-Systems in II-VI Halbleiter Quantum Dots (QDs) durch elektrische Ströme über Mikrospulen. Mikrometer-große Leiterschleifen sind auf der Oberseite von Heterostrukturen mit geladenen CdSe/ZnS QDs hergestellt worden. Eine Strominjektion erzeugt magnetische Felder im Bereich von einige 10 mT, welche stark genug sind, um die Hyperfeinwechselwirkung in CdSe QDs modulieren zu können. Der Durchmesser des Spulen im Mikrometer-Bereich ermöglicht die Generation von schnellen Feld transienten im Bereich von wenigen ns. Mit diesen Vorteilen der Mikrospulen werden die Steuerungs des Spins der residenten Elektronen sowie das Auslesen des Kernspinzustandes durch elektrische Impulse nachgewiesen. Der zweite Teil befasst sich mit der Ladungsträger-Spindynamik in ZnO Quantum Well (QW) Strukturen und Epitaxieschichten, die mittels des optischen Übergang von negativ geladenen Exzitonen X− beziehungsweise des am neutralen Donator gebunden Exziton D0X untersucht werden. Der Loch-Spin kann direkt über die zirkular polarisierten Photolumineszenz der beiden Komplexe zurückverfolgt werde. Die Spin-Relaxationszeit von QW und Epiplyer verfolgt werden. Der Spin des Donatorelektronens wird über die Ausbleichung des Spin-selektive Anregungprozesses nachgewiesen. Es werden longitudinale Loch-Spinrelaxationszeiten von 80 bis 140 ps für D0X und X− gefunden. Deutlich längere longitudinalen Elektronen-Spin-Relaxationszeiten in Bereich von mehreren 100 ns werden gefunden, wenn die Hyperfeinwechselwirkung durch ein geeignetes externes Magnetfeld unterdrückt wird. Eine Feldstärke von 2 mT ist groß genug. Dies zeigt den extrem kleinen Wert des Overhauser-Feldes in ZnO auf, der durch die sehr begrenzte Anzahl von magnetischen Kernen in Wechselwirkung mit dem Elektronen innerhalb des Volumens des Donators verursacht wird. / This work is composed of two parts of studies. The first part represents an electron-nuclear spin control in II-VI semiconductor quantum dots (QDs) by electrical currents via micro coils. Micrometer single turn coils are fabricated on top of heterostructures with charged CdSe/ZnSe QDs. Current injection creates magnetic fields in the range of some 10 mT which is strong enough to modulate the hyperfine interaction in CdSe. The micrometer-range diameter of coil allows for generation of fast field transient in the range of few ns. Using these advantages of micro coils, local control of the resident electron spin as well as read out of the nuclear spin state are demonstrated by electrical pulses. The second part presents charged carrier spin dynamics in ZnO quantum wells and epilayers using the optical transition of the negatively charged exciton X− and the neutral donor bound exciton D0X, respectively. The hole spin can be directly traced by the circular polarized photoluminescence of both complexes. The spin relaxation of the resident electrons and donor electrons is accessed via the bleaching of the spin selective excitation process. Longitudinal hole spin relaxation times of 80 and 140 ps are found for D0X and X−, respectively. Much longer longitudinal electron spin relaxation times in the several 100 ns range are uncovered if the hyperfine interaction is suppressed by a proper external magnetic field. A field strength of 2 mT is large enough proving that the extremely small value of the Overhauser field in ZnO caused by the very restricted number of magnetic nuclei interacting with the electron inside the donor volume.