VictorJuiz/thesis huggingface dataset:
Research on radiocarbon calibration records, focussing on new measurements from Lake Suigetsu, Japan
Keywords: radiocarbon
14C
radiocarbon calibration
Lake Suigetsu
varves

Radiocarbon calibration is a fundamental stage of the radiocarbon dating process if meaningful calendar ages are to be derived from samples’ radiocarbon determinations. However, the present limit of direct, non-reservoir-corrected, atmospheric radiocarbon calibration is 12,550 calibrated years before present (Reimer et al. 2009), leaving approximately three quarters of the radiocarbon timescale to be necessarily calibrated via less secure marine records.
The sediment profile of Lake Suigetsu, Honshu Island, central Japan, offers an ideal opportunity from which to derive an extended, ‘wholly terrestrial’ and continuous record of atmospheric radiocarbon back to the limits of radiocarbon detection (circa 60,000 years before present). The presence of well-defined, annually-deposited laminae (varves) throughout this extended time period provides an independent, high resolution chronometer against which radiocarbon measurements, performed upon plant macrofossil samples retrieved from the sediment column, can be directly related. This site was first exploited for radiocarbon calibration purposes by Kitagawa and van der Plicht (1998a, 1998b), however, issues pertaining to the reliability of the calendar age scale of this work precluded the widespread uptake of this dataset.
The work presented in this DPhil thesis represents a significant contribution to the broader, ‘Suigetsu Varves 2006’ project – an international collaboration centring on the re-coring of Lake Suigetsu, which was undertaken in summer 2006 to improve upon the shortcomings of the previous project and, thereby, to fully exploit the site’s potential for both radiocarbon calibration and multi-proxy palaeoenvironmental study (Nakagawa et al. 2011).
This DPhil thesis describes the generation of the revised (‘SG06’) terrestrial radiocarbon calibration dataset from Lake Suigetsu, comprising 647 accelerator mass spectrometry (AMS) radiocarbon determinations, and extending across the complete range of the radiocarbon dating method. Furthermore, visual matching of archive SG93 core sections to the continuous SG06 sediment profile was undertaken, allowing the integration of the ≈ 300 radiocarbon determinations from the original Lake Suigetsu project into a higher resolution (≈ 900 radiocarbon measurements), combined Lake Suigetsu radiocarbon calibration dataset, providing a unique reconstruction of atmospheric radiocarbon across the entire radiocarbon dating timescale.
Kitagawa H and van der Plicht J (1998a) Science 279, 1187-1190. Kitagawa H and van der Plicht J (1998b) Radiocarbon 40 (1), 505-515. Nakagawa T et al. (2011) Quaternary Science Reviews, in press.
Reimer PJ et al. (2009) Radiocarbon 51 (4), 1111-1150.
Aspirations, education and inequality in England
Keywords: inequality
education
aspirations
youth

The concept of aspiration is central to current policy debates about educational and social inequality in the UK. Although aspirations have long been of interest to social scientists there is still uncertainty about how much aspirations influence outcomes and the factors that shape educational and occupational aspirations. I contribute to this policy debate and area of study by examining in detail the mechanisms that shape aspirations and the meaning that young people attach to them. It is often claimed that disadvantaged young people suffer from 'poverty of aspirations'. Contrary to such claims, my findings show that the vast majority of students hold high aspirations for pursuing further academic qualifications, including those from highly disadvantaged backgrounds. I therefore question the grounds for treating 'poverty of aspirations' as a major social problem that should be tackled through interventions designed to raise them.
In this mixed methods study I draw on both quantitative and qualitative sources of data. The quantitative data is from the Effective Provision Pre-school, Primary and Secondary Education project (EPPSE). I examine the factors that are predictive of students holding high aspirations at the age of 14. The qualitative data I draw on is from twenty-nine semi-structured interviews with 16-18 years old from a sixth form college in East London. I contribute to the literature by showing in detail how aspirations are shaped by individual, family, school and neighbourhood level processes. In particular, I also show how important family life is in shaping aspirations and that in order to understand aspirations we should focus on the meaning young people attach to them. My findings suggest that our current models of aspirations are in need of refinement because they underestimate how high the aspirations of young people are and therefore struggle to explain how they are related to students' social backgrounds.
Word and object in Lucretius: Epicurean linguistics in theory and practice
Keywords: language theory
Epicurus
Lucretius

This thesis combines a philosophical interpretation of Epicurean attitudes to language with literary analysis of the language of DRN. Chapters 1-2 describe Epicurean attitudes to diachronic and synchronic linguistic phenomena. In the first chapter I claim that the Epicurean account of the first stage of the development of language involves pre-rational humans acting under a ‘strong’ form of compulsion. The analogies with which Lucretius describes this process were motivated by a structural similarity between the Epicurean accounts of phylogenetic and ontogenetic psychology. Chapter 2 explores the Epicurean account of word use and recognition, central to which are ‘conceptions’. These are attitudes which express propositions; they are not mental images. Προλήψεις, a special class of conception, are self-evidently true basic beliefs about how objects in the world are categorized which, alongside the non-doxastic criteria of perceptions and feelings, play a foundational role in enquiry. Chapter 3 offers a reconstruction of an Epicurean theory of metaphor. Metaphor, for Epicureans, involves the subordination of additional conceptions to words to create secondary meanings. Secondary meanings are to be understood by referring back to primary meanings. Accordingly, Lucretius’ use of metaphor regularly involves the juxtaposition in the text of primary and secondary uses of terms. An account of conceptual metaphor in DRN is given in which the various conceptual domains from which Lucretius draws his metaphorical language are mapped and explored. Chapter 4 presents a new argument against ‘atomological’ readings of Lucretius’ atoms/letters analogies. Lucretian implicit etymologies involve the illustration, via juxtaposition, of language change across time. This is fully in keeping with the Epicurean account of language development. Chapter 5 describes Lucretius’ reflections on and interactions with the Greek language. I suggest that the study of lexical Hellenisms in DRN must be sensitive to the distinction between lexical borrowing and linguistic code-switching. I then give an account of morphological calquing in the poem, presenting it as a significant but overlooked strategy for Lucretian vocabulary-formation.
Money in the Roman Empire from Hadrian to the Severi: A study of attitudes and practice
Keywords: Roman economy
monetary history
Roman law
new institutional economics

The present study offers an in-depth examination of the institutional framework within which money operated as an economic agent in the Roman empire. Analyses focus on Classical Roman Law as reflected in the writings of Roman jurists from the second and early-third centuries CE. The legal sources are augmented by documentary materials, which give independent, albeit sporadic, evidence for actual practice. The thesis follows current trends in economic history to adopt approaches advanced by New Institutional Economics (NIE), while generally accepting Keynesian claims for the endogenous nature of money. Its innovative contribution is in suggesting a complexity-oriented approach to modelling the behaviour of money in the Roman empire; seeing money as a complex economic phenomenon, i.e. as a diverse and manifold apparatus which allows for new patterns of activity to be created by individuals, who self-adjust their use of it to the continuously evolving system in which they operate.
The thesis is divided into four parts. The first is introductory. The second concerns the legal institutional framework for economic interaction; with discussions generally organised according to Roman legal categorisation, and considers developments in the role allocated to money in legal definitions for exchange transaction. The third part examines two study-cases of money-related institutions, namely, the instrument of interest, and interest-bearing deposits, demonstrating how money stimulated the interconnected dynamics within and between legal traditions operating under Roman regime. The fourth and last part is dedicated to a more general analysis of the complex nature of Roman money, attempting to model the historical example of Roman money with the help of complexity-oriented visualisations.
Understanding vaccine induced protective immunity to Mycobacterium tuberculosis
Keywords: Vaccine
T cell
Tuberculosis
Lung

The current worldwide epidemic of Mycobacterium tuberculosis infection is a huge global health problem. Widespread BCG vaccination remains a useful tool in combating this epidemic; however, its variable efficacy requires urgent development of novel vaccines against Mycobacterium tuberculosis. Such a candidate vaccine is a serotype 5 adenovirus expressing antigen 85A from M. tuberculosis (Ad85A). In animal models Ad85A confers significant protection when administered intra-nasally. The work in this thesis demonstrates that intra-nasal immunisation with Ad85A results in inhibition of M. tuberculosis growth in the lung early after infection, in contrast to the late inhibition induced by parenterally administered vaccines. Early inhibition correlates with the presence in the lung of a highly activated population of antigen-specific CD8 T cells, maintained for at least 6 months post-immunisation by persistent antigen. For intra-nasal Ad85A to be effective, the vaccine must be delivered into the lower respiratory tract, as immunisation targeting only the nasal-associated lymphoid tissue (NALT) does not result in protection. Following a change of animal facility, the lung immune response to intra-dermal immunisation with Ad85A increased and this route of immunisation now induced protection, though growth of M. tuberculosis was inhibited only late after infection. However, this response and protection can be altered by exposure to environmental mycobacteria. Further experiments showed that simultaneous respiratory and parenteral immunisations (SIM) act additively, where local lung immunity inhibits the growth of M. tuberculosis early after infection and systemic immunity protects later. SIM regimes generate greatly improved protection over either immunisation alone and do not depend on priming and boosting.
Child assent to clinical research participation: how to determine a child's ability to assent
Keywords: assent
clinical research
paediatrics
consent
bioethics

Assent, currently defined as “a child’s affirmative agreement”, is a way in which some children are included in the decision-making process regarding their participation in clinical research. Current guidelines for paediatric research do not provide clear directions for how assent should be handled, resulting in confusion among researchers. The goal of this research project was two-fold: to examine the ethical arguments for assent with a view to developing concrete moral justification for its being required, and to develop a framework of significant issues for an investigator to consider when deciding whether to gain assent from an individual child.
After an in-depth analysis, it was determined that the ethical justification for assent arises from the researcher’s dual obligations to the child and his parents. A child’s parents are responsible for determining when and how he will develop his decision-making ability. The researcher has an obligation to engage with the child in a manner that complements their pedagogical style, while also treating the child as a being of moral worth. As a child’s family context has an influence on his participation in medical decision-making, further research on children’s daily decision-making within their families is needed.
To this end, a three-phase research agenda was designed: a qualitative focus group study, a quantitative questionnaire study, and a discussion panel with paediatric experts. The children in these studies clearly desired to make decisions but did not express an interest in having complete control. They expected their parents to provide them with decision-making guidance in most aspects of their lives. Data collected from parents illustrated that they often tried to involve their children in decisions by providing them with limited options from which to choose and encouraging family discussion. Participants in the discussion panel stated that they did not expect children to make an independent decision regarding medical care, but they might attempt to give children smaller decisions, such as the arm used to provide a blood sample.
These results indicate that the definition of assent should be revised, emphasising the child’s involvement in the overall decision making process, without an expectation of an “affirmative agreement”, likely mimicking a familiar decision-making setting from his family context. This could then be documented in the child’s clinical notes through a brief description of all relevant interactions and/or discussions with the child, resulting in an accurate portrayal of the entire assent process.
Monolayers of cationic surfactants at the air-water and oil-water interfaces
Keywords: oil-water interface
sum-frequency spectroscopy
sum-frequency generation
ellipsometry
interfacial tension
interfacial monolayer
surface tension
surfactant monolayer
cationic surfactant
air-water interface
mixed monolayer

Monolayers of the cationic surfactant hexadecyltrimethylammonium halide (CTAX, where X = F-, Cl-, Br-, and I-) have been studied at the air-water and oil-water interfaces. At the air-water interface, the effects of the halide counterion and the addition of counterion were investigated. Sum-frequency spectroscopy (SFS), ellipsometry, and surface tensiometry indicated that the counterion changed the efficiency and effectiveness of the surfactant, both decreasing in the order of Br- > Cl- > F-. The addition of salt in the form of 0.1 M KX was found to reduce the cmc but had little effect on the limiting area per molecule attained at the cmc, which increased from 44 Å2 for CTAB to 65 Å2 for CTAC and ca. 94 Å2 for CTAF. Neither SFS nor ellipsometry provided any firm evidence for specific effects of the halide ions on the structure of the surfactant monolayers. For CTAB monolayers in the absence of excess electrolyte, the effect of area per molecule on the sum-frequency (SF) spectra was studied.
Mixed monolayers of CTAB and tetradecane at the air-water interface exhibit a first-order phase transition from a conformationally disordered to a conformationally ordered state as the temperature is lowered. The phase transition occurs ca. 11 °C above the bulk melting point of tetradecane.
A new experimental arrangement is described for acquiring SF spectra from surfactants at the oil-water interface. The key features of this approach are the stabilisation of a thin oil film between a sapphire prism and an aqueous phase, and the use of total internal reflection to enhance the total signal and discriminate against signals from other interfaces in the system. With this new methodology, the first SF vibrational spectra of surfactant monolayers at an alkane-water interface were obtained. Surface tensiometry was used to characterise the monolayers further. The structure of CTAB monolayers at the hexadecane-water interface was determined by SFS and compared with monolayers of CTAB at the air-water interface. At low concentrations, CTAB/hexadecane showed the expected features in the C–H stretching region, characteristic of a conformationally disordered monolayer. As the bulk concentration approached the critical micelle concentration, the spectra changed to one characteristic of a more ordered, upright conformation. Ellipsometric measurements supported this conclusion. This qualitative structural change is not observed in analogous monolayers at the air-water interface or CCl4-water interface, or in surfactant solutions in contact with a hydrophobic solid surface.
Enduring challenges of statebuilding: British-led police reforms in Sierra Leone, 1945-1961 and 1998-2007
Keywords: security
Statebuilding
police
sovereignty
governance
Sierra Leone

This study analyzes two British-led police reforms in Sierra Leone from 1945-1961 and 1998-2007, exploring how reinterpretations of sovereignty, security and statehood affected strategies of statebuilding over time. Tracing the effects of reform from the first to the second period, it focuses on three practical questions facing reformers: what kind of coercive capacity the police should be invested with (force); where they should be and for what purposes (territoriality); and in what relation they ought to stand with nonstate policing actors (legitimate authority). A key finding is that reinterpretations of security and sovereignty to center on internal threats and state-society relations served to channel more international attention and resources to police forces in weak states. From a relatively restricted field whose impulses came from policing experiences in other colonies and in Britain, recent post-conflict police reforms were informed by knowledge about economic growth, social mobility and global security. However, strategy was muddled when donors committed to conflicting agendas entered the fray. As a result, the latest reform was profoundly shaped by negotiations of the meaning of key concepts like ‘security’. The second part of the study draws on insights about reform to address debates on intervention and sovereignty. Against the image of Western-led interventions suspending local sovereignty, it is argued that the colonial legacy allowed the Sierra Leonean government to prolong and deepen the recent intervention. Contrary to the image of Sierra Leone’s international relations as exploitative and personalized, the study explores how policing became a field where new and legitimate links with the outside world were established after reform.
Unconventional futures: anticipation, materiality, and the market in oil shale development
Keywords: materiality
Utah
marketization
energy politics
unconventional oil
oil shale
natural resources
Jordan
futures
Estonia
energy geographies

This thesis offers a political geography of unconventional energy development through a study of a particular fossil fuel resource called oil shale. Having long occupied a critical place in the politics and economy of certain states, most notably in Estonia, oil shale is now widely known as an ‘unconventional’ resource that is yet to become technically possible, commercially viable and socially acceptable to exploit. Following the movement through which oil shale becomes both unconventional and conventional, the thesis traces the resource through a series of geo-scientific, economic and political interventions. This study is based on analysis of technical literature and policy documents along with ethnographic fieldwork, interviews, and site visits conducted in Estonia, Colorado, Utah, Jordan, London and Brussels. Drawing together relational accounts of natural resources in political ecology and economic geography with insights from Science and Technology Studies, this project both contributes to critical research on the carbon economy and to recent debates on the concepts of materiality, anticipation, and marketization in social sciences. The thesis proposes a relational conceptualization of resource materiality, situating oil shale in multiple and conflicting forms which derive from geographically disparate practices in both resource assessment and technological development. The future of oil shale exploitation is not pre-determined by the process of global resource decline, nor is it precluded by international demands to move towards lower-carbon futures. Rather, it is determined through the conjunction of different future-oriented economic and political calculations that are entangled with resource materials and associated technological systems. Developing a non-essentialist account of markets as socio-technically distributed arrangements, the thesis argues that these rival calculations influence the design of market rules for both energy and emissions trading. The thesis concludes that what counts as ‘unconventional’ is not given, but continues to be both created and contested at the same time as it is ‘conventionalized’.
State-society relations and regional role: comparing Egypt and South Africa
Keywords: South African Foreign Policy
Egyptian Foreign Policy
Regional Powers
Egyptian Politics
South African Politics

The study explains the regional roles of Egypt and South Africa in the last two decades by reference to the state’s relationship with society, a variable that has long been underplayed in international relations and foreign policy literature. It suggests that the different character of this relationship in each country has shaped the opportunities and constraints affecting the foreign policy choices of both the state and societal institutions in the two countries.
The study adopts a cross-disciplinary approach using debates on state capacity and its relationship with regime type in comparative politics and political economy to understand and evaluate the two countries' foreign policies in their respective regions.
After analysing the impact of state-society relationships on the regional role conceptions of the state and societal actors, the study compares the performance of these actors in two case studies; the Palestinian-Israeli conflict in the case of Egypt and the Zimbabwean crisis in the case of South Africa. It concludes that although the role of each state in resolving its respective regional conflict has been less than effective, the post-apartheid democratic dispensation has provided opportunities for South African social forces to play roles that complemented, checked and balanced the role of the state, compared to their Egyptian counterparts.
On the other hand, the soft authoritarian Egyptian state used its role in the Palestinian-Israeli conflict to maintain the international alliances that helped to sustain its domestic control. This constrained the state's foreign policy options. It made marketing peace as 'a strategic choice' and containing resistance movements the priorities of Egypt's intervention in the Palestinian issue. The co-optation of the Egyptian business community and the exclusion of Islamist forces by the state weakened their roles in conflict resolution, depriving the state of tools of effectiveness.
In the case of South Africa, racial politics, the ANC's liberation movement psyche, and the domination of the presidency over foreign policy making have hindered the promotion of NEPAD's principles of democracy and respect for human rights in the case of Zimbabwe. However, South African civil society played a crucial role in supporting its Zimbabwean counterpart, holding the South African state accountable to its foreign policy principles and its democratic institutions, and intervening where the state's role was missing or insufficient.