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Late-Glacial And Holocene Variations In Fire Frequency In The Central Plateau And Yellowstone-Lamar Provinces Of Yellowstone National Park, Sarah Hooper Millspaugh Jan 1997

Late-Glacial And Holocene Variations In Fire Frequency In The Central Plateau And Yellowstone-Lamar Provinces Of Yellowstone National Park, Sarah Hooper Millspaugh

School of Geography, Earth and Environmental Sciences Theses

The fire history in two geovegetation provinces in Yellowstone National Park was reconstructed to determine relations between postglacial climate change, fire frequency, and vegetation. Fire reconstructions were based on charcoal preserved in lake-sediment cores from the Central Plateau and Yellowstone-Lamar Provinces, and fire-related erosional events were inferred from changes in sediment magnetism. The fire records were compared with pollen data and paleoclimatic reconstructions for the past 17,000 years. In the Central Plateau Province, infertile soils restricted the vegetation response to Holocene climate changes, but fire frequency changed continuously as a result of variations in the intensity of summer drought. Fire …


Racism And Racial Categorization., J Blascovich, Na Wyer, La Swart, Jl Kibler Jan 1997

Racism And Racial Categorization., J Blascovich, Na Wyer, La Swart, Jl Kibler

School of Psychology

Social identity theory predicts that perceivers strongly identified with an in-group will maximize the distinction and maintain a clear boundary between their own and other groups by categorizing others' membership accurately. Two experiments tested the prediction that racially prejudiced individuals, who presumably identify highly with their racial in-group, are more motivated to make accurate racial categorizations than nonprejudiced individuals. Results indicated that prejudiced participants not only took longer to categorize race-ambiguous targets (Experiments 1 and 2), but also made more nonverbal vocalizations when presented with them (Experiment 1), suggesting response hesitation. The results support the hypothesis that, compared to nonprejudiced …


Life-Cycle Parameters Of Tisbe Battagliai (Copepoda: Harpacticoida) As Indicators Of Chronic Toxicity, Timothy Dorian Williams Jan 1997

Life-Cycle Parameters Of Tisbe Battagliai (Copepoda: Harpacticoida) As Indicators Of Chronic Toxicity, Timothy Dorian Williams

School of Biological and Marine Sciences Theses

There is growing concern about the fate and biological effects of chemical contaminants in the marine environment. In the United Kingdom, the present ability to detect the potential long-term effects of contaminants is limited by the lack of suitable laboratory methods for measuring chronic toxicity. The harpacticoid copepod Tisbe battagliai was selected as a candidate test organism and a suite of chronic toxicity test methods was developed for measuring the effect of chemical contaminants on individual copepods (postembryonic development, reproduction and life-table analysis) and populations of T. battagliai. The development of chronic test methods proceeded alongside investigations of the influence …


Mathematical Modelling Of The Dynamic Response, In Six Degrees Of Freedom, Of Small Vessels In A Seaway, Barbara Diana Wallis Jan 1997

Mathematical Modelling Of The Dynamic Response, In Six Degrees Of Freedom, Of Small Vessels In A Seaway, Barbara Diana Wallis

Other Faculty of Science and Engineering Theses

This thesis treats the motion of a small vessel described in six degrees of freedom. There are three are translation equations of motion and the other three are equations of angular motion. The aim is to develop a model with a sound mathematical base and use experimentation to find forces to aid the completion of the model, with the intention of use in an auto pilot, by the following means: 1) By solving the equations of motion for large movements, with given sea and wind conditions and also with given control forces and moments. 2) Deduce the forces and moments …


Structure-Activity Relationships In Glucosinolates As Oviposition Stimulants Of The Cabbage Root Fly, Delia Radicum (L.), Neil Patrick Chilcott Jan 1997

Structure-Activity Relationships In Glucosinolates As Oviposition Stimulants Of The Cabbage Root Fly, Delia Radicum (L.), Neil Patrick Chilcott

Other Faculty of Science and Engineering Theses

A statistically sound and quantifiable bioassay procedure was developed for determining the response of adult Delia radicum to oviposition stimulants. The method was based on the use of surrogate leaves coated with test compounds. All of the test compounds were of purity 99% or greater. Twelve of the tested compounds were synthesised the remaining twenty four were either donated or available commercially. Attempts to follow literature methods to synthesise glucosinolates were unsatisfactory and an investigation of the procedures led to a number of synthetic modifications. Despite various attempts, the failure to sulphate a thiohydroximate to produce a glucosinolate was not …


Improving The Performance Of Weaner Pigs Through Developments In Liquid Feeding, Tina Maria Geary Jan 1997

Improving The Performance Of Weaner Pigs Through Developments In Liquid Feeding, Tina Maria Geary

Other Faculty of Science and Engineering Theses

A programme of work was undertaken to assess the efficacy of a new automated ad libitum feed delivery system for newly weaned pigs; to investigate the effects of liquid feeding on their performance and to explore the possibilities for reducing diet cost by using lower cost liquid components. A series of 28 day feeding trials was conducted using pigs weaned at 24 ± 4 days and fed ad libitum on liquid diets. Compared with pigs fed dry diets, liquid feeding increased feed intake by 109 ± 10 g dˉ¹ (P<0.001) and daily gain by 57± 14 g dˉ¹ (P<0.001). Pig growth and feed conversion ratio was not significantly influenced by dry matter content over the range of 255 - 149 g DM kgˉ¹. However, diets containing less than 220 g DM kgˉ¹ increased effluent output per kg of liveweight gain. Within the liquid feed system a natural lactic acid fermentation occurred which reduced diet pH ≤ 4.0 and inhibited the growth of coliform bacteria. Pigs fed diets in which pH was reduced to ≤ 4.0 by acidification with either lactic acid or Pediococcus acidilactici had daily gains of 496 and 474 ± 17 g dˉ¹ and feed conversion ratios of 1.11 and 1.15 ± 0.06 respectively. A series of laboratory studies was conducted with the aim of upgrading and controlling fermentation of food industry liquid residues for use in liquid diets for weaners. Steeping was investigated as a method for reducing glycoalkaloid levels in reject raw potatoes. A combination of natural fermentation and hydrolysis reduced the levels of α-solanine by 16.6 mg kgˉ¹ (35%) and α-chaconine by 28.7 mg kgˉ¹ (51%) respectively. Diets based on the food industry liquid residues (Whey, 'C'-Starch and Greenwich Gold), were either allowed to ferment naturally or inoculated with Enterococcus faecium or Pediococcus acidilactici. Inoculation with either Enterococcus faecium or Pediococcus acidilactici did not result in a significant difference in the final pH of the diets or in the final populations of microorganisms examined compared with the control. The series of studies demonstrated the potential for improving weaner pigs performance using fermented liquid diets. However, it highlighted the need for further studies to obtain a greater degree of control over fermentation patterns.


A Strategic Choice Model For Asia-Pacific Shipping, Jeffrey Edward Hawkins Jan 1997

A Strategic Choice Model For Asia-Pacific Shipping, Jeffrey Edward Hawkins

Other Faculty of Science and Engineering Theses

The importance of strategy to an organisation's competitiveness is widely acknowledged in the strategic management literature. However, although strategy research has become substantial in other areas, the same cannot be said with the shipping industry. Very littie is known about how shipowners choose competitive strategies or what strategies they pursue under certain environmental conditions. Of what is available, most focus on Northern Europe and Northem America, with scant regard for the Asia-Pacific, which has become a major shipping power in recent decades. This study was, therefore, conducted to address these gaps in the literature. It analysed the strategic choices made …


Iran's Potential As A Landbridge For Former Ussr Republics: A Scenario Approach, Parviz Bavarsad-Ahmadi Jan 1997

Iran's Potential As A Landbridge For Former Ussr Republics: A Scenario Approach, Parviz Bavarsad-Ahmadi

Other Faculty of Science and Engineering Theses

The concept of a landbridge refers to different types of integrated origin-destination international movements of shipments (in various combinations of sea, land and air) under a single waybill. There are different examples of landbridges with different characteristics related to transport supply facilities, organisational structure and managerial skills. Certain limitations of existing landbridge studies are discussed. They include the failure of a comprehensive academic study to account jointly for both demand and supply of landbridge services. Most articles on landbridges discuss the Trans-Siberian Railway or east-west coast landbridges of the United States of America. No comprehensive academic studies of landbridges in …


Study Of The Barriers To The Implementation Of Computerised Information Systems In The National Health Service, Gloria Lankshear Jan 1997

Study Of The Barriers To The Implementation Of Computerised Information Systems In The National Health Service, Gloria Lankshear

Plymouth Business School Theses

In order for computerised information systems (CIS) to be utilised to their full potential they must first be successfully implemented. The acquisition and implementation process continues to be an area which is reported by the media to present problems for both public and private sector organisations (Keen, 1994; Collins, 1996). The process was originally considered to be a technical process only, but more recently there has been acknowledgement that there are human implications. The process of acquisition and implementation of CIS in the NHS has, therefore, been studied in order to identify the barriers which might be present. The research …


Dynamics Of Dense Water Cascades At The Shelf Edge, G. I. Shapiro, A. E. Hill Jan 1997

Dynamics Of Dense Water Cascades At The Shelf Edge, G. I. Shapiro, A. E. Hill

School of Biological and Marine Sciences

No abstract provided.


The Use Of Concept Questions To Improve Student Understanding Of Mechanics, And The Formulation Of A Hierarchical Model Of Student Understanding Of Moments Of Forces, Stuart Rowlands Jan 1997

The Use Of Concept Questions To Improve Student Understanding Of Mechanics, And The Formulation Of A Hierarchical Model Of Student Understanding Of Moments Of Forces, Stuart Rowlands

School of Engineering, Computing and Mathematics Theses

The aims and objectives of the first part of the thesis are to create and evaluate a teaching package that would enable the teacher to facilitate student conceptual understanding of mechanics. The second part is to create a hierarchical model of student conceptual understanding of moments of forces. The thesis reports on the various conflicting theories and recommended teaching strategies from the research into student misconceptions, and examines the various underlying philosophical trends (for example, radical and social constructivism, the Vygotskian perspective and positivism) that have influenced the research into misconceptions in mechanics. As a result, the philosophical perspective of …


Environmental Variables, Including Pollutants, Affecting Living Benthonic Foraminiferida, Catherine Jane Manley Jan 1997

Environmental Variables, Including Pollutants, Affecting Living Benthonic Foraminiferida, Catherine Jane Manley

School of Biological and Marine Sciences Theses

Studies of living benthonic foraminiferal assemblages carried out by marine biologists are comparatively rare. This study of the changes in foraminiferal assemblages from three subtidal sites near Plymouth, U.K., has been carried out with the intention of determining the importance of various abiotic and biotic variables to the foraminiferal communities studied using statistical correlation. Temperature and salinity at depth and particle size characteristics together with organic content, bacterial abundance and type, and other meiofauna present were assessed monthly with samples taken for foraminiferal content, and for seasonal diatom analysis. Deformed specimens were very rare in the examined samples of natural …


Oxygen-Dependent Metabolism Of Organic Xenobiotics In Marine Fish And Mussel, Laurence David Peters Jan 1997

Oxygen-Dependent Metabolism Of Organic Xenobiotics In Marine Fish And Mussel, Laurence David Peters

School of Biological and Marine Sciences Theses

Studies were undertaken to examine the processes of oxygen-dependent organic xenobiotic metabolism in fish and mussel. The antioxidant enzymes superoxide dismutase (EC 1.15.1.1 ), catalase (EC 1.11.1.6), selenium-dependent glutathione peroxidase (SeGPX; EC 1.11.1.9) glutathione reducate (EC 1.6.4.2), DT Diaphorase (quinone oxidoreductase; EC 1.6.99.2), total GPX activity (sum of SeGPX and Se-independent GPX activities) and levels of cytochrome P450 (CYP) were determined in 13 500g supernatants of embryos, 3- day and 11-day post-hatch larvae of turbot Scophthalmus maximus. The early life stages of S. maximus demonstrated the potential to detoxify reactive oxygen species (ROS), organic peroxides and redox cycling compounds. The …


Ecophysiology Of Neomysis Integer (Mysidacea: Peracarida), Stephen Derek Roast Jan 1997

Ecophysiology Of Neomysis Integer (Mysidacea: Peracarida), Stephen Derek Roast

School of Biological and Marine Sciences Theses

Neomysis integer (Leach) (Peracarida: Mysidacea) is a common component of the hyperbenthos of Western European estuaries, and this study focused on the ecophysiology and ecotoxicology of this mysid. Behavioural and physiological responses of N. integer to physical and chemical variables (current velocity, substratum type, temperature and salinity) were measured in the laboratory to gain better understanding of how this mysid maintains position in estuaries. Current velocity was the most important factor controlling position maintenance, and N. integer had a maximum swimming speed of c. 9cm sˉ¹. Position maintenance was facilitated by a muddy substratum and was not affected by salinity. …


Intelligent Techniques For Handling Uncertainty In The Assessment Of Neonatal Outcome, Jonathan Mark Garibaldi Jan 1997

Intelligent Techniques For Handling Uncertainty In The Assessment Of Neonatal Outcome, Jonathan Mark Garibaldi

School of Engineering, Computing and Mathematics Theses

Objective assessment of the neonatal outcome of labour is important, but it is a difficult and challenging problem. It is an invaluable source of information which can be used to provide feedback to clinicians, to audit a unit's overall performance, and can guide subsequent neonatal care. Current methods are inadequate as they fail to distinguish damage that occurred during labour from damage that occurred before or after labour. Analysis of the chemical acid-base status of blood taken from the umbilical cord of an infant immediately after delivery provides information on any damage suffered by the infant due to lack of …


Design With Attitude: A Key World Class Method, Aj Robotham, Gn Blount Jan 1997

Design With Attitude: A Key World Class Method, Aj Robotham, Gn Blount

School of Engineering, Computing and Mathematics

World Class Design by implication can best be achieved by adopting world class methods. ICED conferences continue to disseminate methodologies to help make designers and design teams more effective and efficient. At ICED 95 we introduced our PAKTS model (Figure 1.) which identified the total educational needs of young engineering designers [Robotham 1995]. The five key elements of the model are Processes, Attitudes, Knowledge, Tools and Skills. Of these elements, the least developed in terms of methodologies is that of “Attitude”. This paper will give further consideration to this element and identify the qualities that a designer must develop to …


Ambulatory Infusion Of Dacarbazine For Metastatic Malignant Melanoma: A Clinical, Pharmaceutical And Pharmacokinetic Case Report, Gj Sewell, A Hong Jan 1997

Ambulatory Infusion Of Dacarbazine For Metastatic Malignant Melanoma: A Clinical, Pharmaceutical And Pharmacokinetic Case Report, Gj Sewell, A Hong

School of Health Professions

No abstract provided.


Developments In Oncology Research At The Pharmacy Department, Derriford Hospital, Plymouth, Gj Sewell Jan 1997

Developments In Oncology Research At The Pharmacy Department, Derriford Hospital, Plymouth, Gj Sewell

School of Health Professions

No abstract provided.


Amphibolous Weglarskae Dastych, A New Addition To The Tardigrada Of Iceland With An Updated Checklist Of Icelandic Species (Eohypsibiidae, Eutardigrada)., Nj Marley, De Wright Nov 1996

Amphibolous Weglarskae Dastych, A New Addition To The Tardigrada Of Iceland With An Updated Checklist Of Icelandic Species (Eohypsibiidae, Eutardigrada)., Nj Marley, De Wright

School of Biological and Marine Sciences

During the examination of the extensive Tardigrada collections held at the Royal Museums of Scotland, specimens and sculptured eggs belonging to Amphibolus weglarskae (Dastych) were identified in the Morgan Icelandic collection. This species had not previously been reported from Iceland. A checklist of Icelandic Tardigrada species is also provided.


Pfmrk, A Mo15‐Related Protein Kinase From Plasmodium Falciparum, J Li, Kjh Robson, J Chen, Gat Targett, Da Baker Nov 1996

Pfmrk, A Mo15‐Related Protein Kinase From Plasmodium Falciparum, J Li, Kjh Robson, J Chen, Gat Targett, Da Baker

School of Biomedical Sciences

Cyclin-dependent kinases (Cdks) play a central role in the regulation of the eukaryotic cell cycle. A novel gene encoding a Cdk-like protein, Pfmrk, has been isolated from the human malaria parasite Plasmodium falciparum. The gene has no introns and comprises an open reading frame encoding a protein of 324 amino acids with a predicted molecular mass of 38 kDa. Database searches revealed a striking similarity to the Cdk subfamily with the highest similarity to human MO15 (Cdk7). The overall sequence of Pfmrk shares 62% similarity and 46% identity with human MO15, in comparison to the 49–58% similarity and 34–43% identity …


Spreading Pattern And Mesoscale Structure Of Mediterranean Outflow In The Iberian Basin Estimated From Historical Data, G. I. Shapiro, S. L. Meschanov Jan 1996

Spreading Pattern And Mesoscale Structure Of Mediterranean Outflow In The Iberian Basin Estimated From Historical Data, G. I. Shapiro, S. L. Meschanov

School of Biological and Marine Sciences

No abstract provided.


Interfacing High Performance Liquid Chromatography With Inductively Coupled Plasma Mass Spectrometry For Speciation Studies, Warren Raymond Lee Cairns Jan 1996

Interfacing High Performance Liquid Chromatography With Inductively Coupled Plasma Mass Spectrometry For Speciation Studies, Warren Raymond Lee Cairns

School of Geography, Earth and Environmental Sciences Theses

A novel interface for the coupling of high performance liquid chromatography (HPLC) with inductively coupled plasma mass spectrometry (ICP-MS) for the speciation of organometallic compounds has been developed and utilised for a number of diverse applications. Desolvation of the sample prior to reaching the plasma is shown to facilitate a more versatile coupling of the two instrumental techniques. This has been achieved by first volatilising the aerosol after nebulisation of the sample in a heated cyclone spray chamber. The resulting vapour is removed using a membrane drier and a thermoelectrically cooled condenser. The apparatus developed has been fully optimised to …


The Agricultural Ecology Of Hay Meadows Within The Somerset Levels And Moors Environmentally Sensitive Area, Francis William Kirkham Jan 1996

The Agricultural Ecology Of Hay Meadows Within The Somerset Levels And Moors Environmentally Sensitive Area, Francis William Kirkham

School of Geography, Earth and Environmental Sciences Theses

Ecologicai and productivity responses to agricultural management were studied over eiglit years in species-ricii hay meadows within a Site of Special Scientific Interest on a Somerset peat moor. The vegetation typified that of many wet meadows on the Somerset Levels and elsewhere, definable as MG5 {Cynosurus cristatus-Centaurea nigra meadow) and MG8 {Cynosurus cristatus-Caittia palustris flood pasture) within the National Vegetation Classification. The effects of inorganic fertilizers on species diversity, soil nitrogen loss and agricultural productivity (hay yield and beef production during aftermath grazing), were investigated during 1986-90. These data were subsequently analyzed for the effects of variations in water table …


The Effects Of Whole Tree Harvesting On Site Hydrology And Soil Structure At Beddgelert Forest, N. Wales, Uk, Julia Elizabeth Hodgkins Jan 1996

The Effects Of Whole Tree Harvesting On Site Hydrology And Soil Structure At Beddgelert Forest, N. Wales, Uk, Julia Elizabeth Hodgkins

School of Geography, Earth and Environmental Sciences Theses

The ITE biogeochemistry group monitoring solute movement at Beddgelert Forest provided an opportunity to study the hydrology of a steep section of hillslope in a high rainfall environment. The aim of the experiment was to characterise and compare the hillslope hydrologies of one forested and one whole tree harvested site. Particular attention was paid to the influence of trees both directly on soil water pathways and indirectly on soil characteristics. Atmospheric inputs were monitored for the slope and individual plots for one year. In spite of high rainfall volumes, the slope was not waterlogged indicating a soil with high conductivity. …


Enhanced Oil Degradation By Bacteria When Immobilized To An Oleophilic Substratum, Nicola Gail Wilson Jan 1996

Enhanced Oil Degradation By Bacteria When Immobilized To An Oleophilic Substratum, Nicola Gail Wilson

School of Biological and Marine Sciences Theses

Three immobilization matrices, Biofix (kaolinite microspheres), Drizit (polypropylene fibres) and polyester polyurethane were used as substrata for use in bioremediation. Enhanced biodegradation of petrol (Slovene diesel) and Ekofisk crude oil occurred with immobilization of Pseudomonas fluorescens to Biofix and Drizit in freshwater and saltwater systems. When compared to free bacteria, immobilization resulted in; increased growth, accelerated ability of the cells to utilize oil, and enhanced biodegradation as determined by gas chromatography. In the freshwater systems Drizit immobilized cells reduced the lag phase to one day in comparison to six in a free system and increased biodegradation of the n-alkanes by …


International Collision Regulations For Automatic Collision Avoidance, Christopher James Perkins Jan 1996

International Collision Regulations For Automatic Collision Avoidance, Christopher James Perkins

Other Faculty of Science and Engineering Theses

This thesis considers the relationship between collision regulations and an automatic collision avoidance system (ACAS). Automation of ship operations is increasingly common. The automation of the collision avoidance task may have merit on grounds of reduced manual workload and the elimination of human error. Work to date by engineers and computer programmers has focused on modelling the requirements of the current collision regulations. This thesis takes a new approach and indicates that legislative change is a necessary precursor to the implementation of a fully automatic collision avoidance system. A descriptive analysis has been used to consider the nature of the …


The Trade Manufacture And Design Of English Blacksmithing In The Post War Period, David James Hawkins Jan 1996

The Trade Manufacture And Design Of English Blacksmithing In The Post War Period, David James Hawkins

Other Faculty of Arts, Humanities and Business Theses

Blacksmithing has undergone a dramatic transformation in the last twenty five years. This study examines the changes and the context within which they have taken place. The effects upon the products of the blacksmith are considered through empirical research and practical work. The working methods and philosophies of blacksmiths representative of a continuity of traditions and innovatory practice are investigated through interviews and other approaches. From its origins as a rural and industrial craft, blacksmithing has emerged in the form of art-blacksmithing. Institutional and government intervention, new technologies and markets provide the context in which the ideologies and practices are …


Sub-National Electoral Systems And Minority Parties In The European Community, Lisa Sheila Harrison Jan 1996

Sub-National Electoral Systems And Minority Parties In The European Community, Lisa Sheila Harrison

Other Faculty of Arts, Humanities and Business Theses

This thesis analyses the extent to which particular electoral system features and rules affect the opportunities for, and proportionality of, the representation of certain far right and regionalist at various sub-national levels in key European Community member states. The thesis employs data provided in a unique data base at the University of Plymouth. This data includes a wealth of information concerning shares of the votes and shares of the seats for as many identifiable parties as possible in a range of sub-national elections in the post World War Two period and measures the proportionality of elections using three indices of …


Bereavement And Moral And Spiritual Development : An Exploration Of The Experiences Of Children And Young People, Valerie Clark Jan 1996

Bereavement And Moral And Spiritual Development : An Exploration Of The Experiences Of Children And Young People, Valerie Clark

Other Faculty of Arts, Humanities and Business Theses

This thesis, which is in two parts, attempts to interpret in moral and spiritual terms those responses to bereavement that are often described as psychological. In part one human development is considered comparing religious, philosophical, scientific and psychological theories and a model of the 'core self is proposed (body, mind and emotions) which responds to social and cultural influences in ways that can be considered moral and spiritual. Theories of duty, consequence and virtue are considered as well as Kohlberg's theory of justice reasoning and Gilligan's views about caring. Within spirituality notions of dualism and continuity-discontinuity are noted and a …


The Poetry Of Ronald Duncan, Daniel Charles Lane Jan 1996

The Poetry Of Ronald Duncan, Daniel Charles Lane

Other Faculty of Arts, Humanities and Business Theses

This thesis is the first sustained critical analysis of the poetry of Ronald Duncan (1914-1982). As this is the first study of Duncan's poetry, a substantial part is exegesis and follows a chronological pattern. Duncan was a man of letters who wrote poetry, plays, librettos, songs, short stories, journals, autobiographies, biographies and novels. He was strongly influenced by T. S. Eliot and Ezra Pound. Their poetics and personal advice enabled Duncan to produce a series of publications that pursued some basic modernist tenets, such as an adherence to a European poetic tradition and the belief that poetry could induce cultural …