VictorJuiz/thesis huggingface dataset:
Late Holocene environmental change in the Basin of Pátzcuaro, Michoacán, México

This thesis describes late Holocene environmental changes in the Basin of Pátzcuaro, Michoacán, Mexico. Using palaeolimnological evidence it is possible to conclude that the Basin of Pátzcuaro has suffered at least three episodes of disturbance within the last 3,600 years. A minor episode of erosion began about 3,500 years ago and is believed to have been triggered by the onset of sedentary agriculture within the basin. A second, more severe phase of disturbance, occurred between about 2,500 and 1,200 years B.P. during which time there was extensive degradation in the northern part of the catchment; widespread gullying is believed to have occurred at this time. The recent, most intense period of erosion began about 850 years B.P., coinciding with the arrival of the Purépecha in the basin. There is no evidence to suggest that degradation within the catchment intensified after the arrival of the Spanish 470 years B.P. However, a change in the style of erosion from predominantly sheet-wash to gully erosion occurred at approximately 400-500 years B.P. and may reflect the introduction of new agricultural techniques by the Spanish.
Fluctuations in the level of Lake Pátzcuaro have been used to infer late Holocene climatic change. Prior to 4,000 years B.P. dry conditions prevailed. An abrupt change to wetter conditions occurred between about 3,600 and 3,200 years B.P. before becoming more arid. Wetter conditions between 2,500 and 1,200 years B.P. can be inferred from the lake sediment record. The driest period in the record occurred between 1,200 and 850 B.P. Fluctuations in the level of the lake over the last 600 years have been determined from historical records. The lake rose between 600 and 470 years B.P. and remained high until approximately 300 years B.P. after which time the lake level fell once again.

Keywords: Mexico
Advisor: Street-Perrott, F
Burt, T
Developmental welfare in Thailand after the 1997 Asian financial crisis

This thesis explores continuity and change in the developmental welfare approach in Thailand following the 1997 Asian financial crisis. It examines both the exogenous and endogenous forces that generated change as well as both the ‘process’ and the ‘content’ of transformation or responses to the crisis. It uses the One Tambon One Product (OTOP) policy as a case study to explore these changes.
The principle research question is: To what extent did the post 1997 crisis policy on social protection in Thailand represent a shift from its existing institutional path of developmental welfarism? Extending from this overarching question are subsidiary questions, which guided the thesis. They include: To what extent did the OTOP policy address the social protection gaps that became apparent in the Asian financial crisis? To what extent did the OTOP policy benefit its target population?
The thesis uses historical institutionalism (HI) and the role of ideas as the analytic frameworks in analyzing change. The thesis argues that the exogenous shock of the 1997 financial crisis contributed to some departure from the institutional path of developmental welfarism in Thailand. However, the change did not follow the conventional punctuated equilibrium (PE) model under the HI framework in the sense of moving from one equilibrium to another after an exogenous shock. Rather, the radical change that took place after the exogenous shock was gradual. The new set of institutional arrangement prompted significant ideational and institutional transformations. They involved both intended and unintended consequences of incremental shifts in the forms of ‘layering’ drift’ and ‘conversion’ (Streeck and Thelen, 2005). In addition, the thesis argues that the transformation in Thailand after the 1997 financial crisis lies in an intermediate order of change that is found between shifts in policy instrument and a wholesale ‘paradigm shift’ (Hall, 1993). Here, apart from having introduced a new policy such as OTOP, the Thai government engaged in a broader rethinking of Thailand’s developmental welfare path. Moreover, the study finds that the structure of economic development in a developing country context can both promote and impede social protection, rather than only subordinate the latter. The claim is based on the finding that the expansion of economic policy goals in Thailand supported local development and increasing inclusiveness of the informal sector after the 1997 financial crisis. Finally, the thesis argues that social protection delivery or lack thereof reflects contestation of ideas as well as material interests. Both the state and the policy beneficiaries in the OTOP context pushed for their interests when there were gaps between policy formulation and implementation. As a result, changes occurred both in the policy goals and in who benefited from OTOP.

Keywords: Southeast Asia
developmental welfare
1997 financial crisis
One Tambon One Product (OTOP)
social protection
historical institutionalism
Thailand
institutional change
paradigm recalibration
Advisor: Kemp, P
Quantum magnetism probed with muon-spin relaxation

This thesis presents the results of muon-spin relaxation (µ+SR) studies into magnetic materials, and demonstrates how these results can be exploited to quantify the materials’ low moments and reduced dimensionality.
Dipole-field simulations, traditionally used to estimate likely muon sites within a crystal structure, are described. A novel Bayesian approach is introduced which allows bounds to be extracted on magnetic moment sizes and magnetic structures—previously very difficult using µ+SR—based on reasonable assumptions about positions in which muons are likely to stop. The simulations are introduced along with relevant theory, and MµCalc, a platform-independent program which I have developed for performing the calculations is described.
The magnetic ground states of the isostructural double perovskites Ba2NaOsO6 and Ba2LiOsO6 are investigated with µ+SR. In Ba2NaOsO6 long-range magnetic order is detected via the onset of a spontaneous muon-spin precession signal below Tc = 7.2(2) K, while in Ba2LiOsO6 a static but spatially-disordered internal field is found below 8 K. Bayesian analysis is used to show that the magnetic ground state in Ba2NaOsO6 is most likely to be low-moment (˜ 0.2µB) ferromagnetism and not canted antiferromagnetism. Ba2LiOsO6 is antiferromagnetic and a spin-flop transition is found at 5.5 T. A reduced osmium moment is common to both compounds, probably arising from a combination of spin–orbit coupling and frustration.
Results are also presented from µ+SR investigations concerning magnetic ordering in several families of layered, quasi–two-dimensional molecular antiferromagnets based on transition metal ions such as S = ½ Cu2+ bridged with organic ligands such as pyrazine. µ+SR allows us to identify ordering temperatures and study the critical behaviour close to TN , which is difficult using conventional probes. Combining this with measurements of in-plane magnetic exchange J and predictions from quantum Monte Carlo simulations allows assessment of the degree of isolation of the 2D layers through estimates of the effective inter-layer exchange coupling and in-layer correlation lengths at TN. Likely metal-ion moment sizes and muon stopping sites in these materials are identified, based on probabilistic analysis of dipole-fields and of muon–fluorine dipole–dipole coupling in fluorinated materials.

Advisor: Blundell, S
Essays on networks and market design

This thesis comprises four essays in the economics of networks and market design. The common thread in all these essays is the presence of complementarities or externalities. Chapter 2 presents a unified model of networks and matching markets. We build on a contribution by Pycia (2012). We show that strong pairwise alignment of agents’ preferences is a necessary and sufficient condition for the existence of strongly stable networks and strongly stable allocations in multilateral matching markets with finite contracts. Strongly stable networks are not necessarily efficient. Although we use a demanding stability concept, strong pairwise alignment allows for complementarities and externalities. In Chapter 3, we generalise the gross substitutes and complements condition introduced by Sun and Yang (2006). Our new condition guarantees the existence of competitive equilibrium in economies with indivisible goods. Competitive equilibrium can be found using an extension of the double-track adjustment process (Sun and Yang, 2009). In this chapter, we also study contract networks (Ostrovsky, 2008). We show that chain-stable contract allocations can exist even in cyclical contractual networks, such as electricity markets, as long as they are appropriately segmented. In Chapter 4, we run a series of experiments to compare the performance of four auctions – first-price, Vickrey, Vickrey-Nearest Rule (Day and Cramton, 2008), and Reference Rule (Erdil and Klemperer, 2010). In our setting, there are two items and three bidders. Two local bidders want an item each, but the global bidder wants both items. We introduce various exposure and package-bidding treatments. We find that the first-price auction always revenue-dominates all the other auctions without any loss in efficiency, strengthening the results of Marszalec (2011). Exposure affects global bidders only in the first-price auction. In other auctions, global bidders often do not take into account the effect of their own bids on their payments. We find no evidence of threshold effects. Finally, in Chapter 5, we develop a new model of online social network formation. In this model, agents belong to many overlapping social groups. We derive analytical solutions for the macroscopic properties of the network, such as the degree distribution. We study the dynamics of homophily – the tendency of individuals to associate with those similar to themselves. We calibrate our model to Facebook data from ten American colleges.

Keywords: microeconomics
matching markets
market design
auctions
experimental economics
networks
online social networks
Advisor: Crawford, V
Biochemical characterisation of KDM2A

Mammalian genomes are characterised by unique regions of non-methylated DNA known as CpG islands (CGIs). These genomic elements are characterised by a high density of CpGs and an elevated GC content compared to the surrounding, bulk of the genome. CGIs are prevalently associated with the 5’ end of genes and represent key nucleation sites where specific transcription factors and chromatin modifiers are recruited to impact on gene function.
This thesis is focused at understanding the biochemical properties of the recently discovered H3K36-specific histone demethylase, KDM2A. This enzyme is specifically recruited to CGIs but how it interfaces with local chromatin in vivo remains unknown. Using defined chromatin templates in vitro, this study demonstrates that KDM2A binding to DNA relies on a zinc finger CXXC domain that preferentially recognizes non-methylated CpGs. In particular, nucleosomes represent a major barrier to KDM2A binding and chromatin substrates are interpreted by the CXXC domain through specific interaction with CpGs within linker DNAs. Moreover, the adjacent PHD domain does not contribute to KDM2A binding to chromatin.
Together these observations suggest that sequence, methylation status and accessibility of DNA define how CGI chromatin is interpreted by CXXC domain proteins. In particular, the precise targeting of KDM2A to CGIs contributes to the creation of a unique chromatin architecture that highlights gene regulatory regions within large and complex mammalian genomes.

Keywords: zf-CXXC
KDM2A
histone demethylase
CpG island
Advisor: Klose, R
Byzantine monetary affairs during the 8th, 9th, 10th and 11th centuries

The subject for this dissertation is the study of Byzantine monetary affairs from the accesion of Leo III (717) up to the beginning of Alexius I's reign (1081).
The work is divided into the following main chapters:
I. Gold Coinage: Taking into account documentary and fragmentary numismatic evidence new chronologies and a few new attributions are attempted. A thorough survey of the recorded types and a detailed discussion of the relevant literature is included. References to iconography, monetary reforms and minting process are made.
II.Silver Coinage: A similar study, including a separate section on metrology and valuation.
III.Copper Coinage: The focus is concentrated in the coinages of Michael II, Theophilus and the anonymous folles of Class A. With the aid of detailed stylistic analyses, the study of dies and then the geographical distribution of the sylistic groups, the complex problem of provincial mints is discussed. The study is supplemented by four Appendices. Appendices I-III include a descriptive catalogue of 378 copper coins of Michael II and Theophilus upon which the stylistic analysis is based. Appendix IV contains catalogues of hoards and stray finds of Anonymous folles of Cl.A from Greece. Yugoslavia, Bulgaria, Romania and Asia Minor.
IV. Monetary Circulation. A detailed survey of the attested evidence from all the areas under Byzantine dominion is included. On the basis of hoards and stray-finds the trends of the circulation in Greece are described. This study is supplemented by Appendix V, where a corpus of 122 coin hoards is presented.
Concepts of Prydeindod (Britishness) in 18th century Anglo-Welsh Writing; with special reference to the works of Lewis Morris, Evan Evans, and Edward Williams

This thesis presents an analysis of the English-language work of three Welsh writers during the eighteenth century, spanning the period of the 1750s to 1794. During this period, the British state consolidated its power following the last of the significant internal uprisings in 1745, and attempted to create a British nation with internal unity. Such a unity entailed a renegotiation of older national identities as subjects attempted to partake of multiple identities simultaneously. In Wales, the manifestation of multiple identities was especially clear, as the language of the state did not accord with the mother tongue of the majority of Welshmen. Though Welsh literati had written in English since before the Act of Union (1536), choosing to write in English becomes more interesting for the critic during such a time of change. Previously, these works have been treated as aberrations, or literary curiosities less worthy of note than the Welsh-language productions of the same authors. This thesis argues that, instead, they should be analysed as offering an insight into these authors’ conception of Britain, and their place within the state and the new nation, both in the choice of language and the topics considered. As a theoretical basis for these analyses, I consider the concept of Prydeindod from the work of philosopher J.R. Jones, as distinct from the idea of Britishness, and as a way of complicating Anglocentric or binary discussions of Britishness. This in turn informs readings of the English-language productions of Welsh writers in the eighteenth century, and shows that their negotiations of new identities are not as forthright as has previously been assumed.

Keywords: Anglo-Welsh
Welsh literature
Britishness
English literature
Eighteenth Century
national identity
Advisor: Jacobs, J
Johnston, F
'Pierre, or the ambiguities': Bayle, Jurieu and the Dictionnaire Historique et Critique

This thesis presents a new study of Pierre Bayle’s Dictionnaire Historique et Critique (1696), with special reference to Bayle’s polemical engagement with the theologian Pierre Jurieu. While recent years have seen a surge of interest in Bayle, there is as yet no consensus on how to interpret Bayle’s ambiguous stance on reason and religion, and how to make sense of the Dictionnaire: although specific parts of the Dictionnaire have received much scholarly attention, the work has hardly been studied as a whole, and little is known about how the Dictionnaire was influenced by Bayle’s polemic with Jurieu. This thesis aims to establish a new method for reading the Dictionnaire, under a dual premise: first, that the work can only be rightly understood when placed within the immediate context of its production in the 1690s; second, that it is only through an appreciation of the mechanics of the work as a whole, and of the role played by its structural and stylistic particularities, that we can attain an appropriate interpretation of its parts. Special attention is paid to the heated theological-political conflict between Bayle and Jurieu in the 1690s, which had a profound influence on the project of the dictionary and on several of its major themes, such as the tensions in the relationship between the intellectual sphere of the Republic of Letters and the political state, but also the danger of religious fanaticism spurring intolerance and war. The final chapters demonstrate that Bayle’s clash with Jurieu was also one of the driving forces behind Bayle’s reflection on the problem of evil; they expose the fundamentally problematic nature of both Bayle’s theological association with Jurieu, and his self-defence in the second edition of the Dictionnaire.
The title of this thesis comes from Herman Melville’s novel: ‘Pierre, or the Ambiguities’.

Keywords: problem of evil
Pierre Jurieu
Pierre Bayle
Dictionnaire Historique et Critique
Advisor: Brockliss, L
Tunstall, K
Monocytes in acute myocardial infarction

Acute myocardial infarction (AMI) results in the activation of the innate immune system with monocytes playing critical roles in both the initial inflammation following myocardial ischaemia and subsequent recovery. Monocytes are a heterogeneous cell population and observations from experimental models demonstrate that immediately following myocardial injury, classical inflammatory monocytes, which are highly phagocytic, are recruited to ischaemic myocardium from the bone marrow and spleen and peak at 48 hours. This is followed by the recruitment of non-classical monocytes that are involved in repair and healing, peaking at day 5. The monocyte response in humans following AMI is currently poorly understood.
Due to their central role in the pathogenesis of AMI, monocytes are attractive both as potential biomarkers to inform of extent of myocardial injury (and recovery) and also as therapeutic targets with the specific targeting of monocytes in experimental models resulting in reduced infarction size and improved LV remodelling. However, in spite of these promising results and our greater understanding of the pathogenesis of AMI, no immune-modulating therapeutic has been translated into routine clinical practice.
We therefore hypothesized that characterisation of the monocyte response to AMI by flow cytometry and gene expression profiling in both experimental models and humans would give novel insights into underlying biological processes and function (both locally in the myocardium and systemically), identify novel therapeutic targets, enable their use as cellular biomarkers of disease, and test conservation between species validating the experimental model for future investigation.
Classical inflammatory monocytes were found to significantly increase in the peripheral blood 48 hours following AMI in both mice and humans, with the magnitude of the monocyte response correlating with the extent of myocardial injury in both species. Gene expression profiling of peripheral circulating monocytes following AMI identified a number of candidate genes, biological pathways and upstream regulators that were conserved between species and that could represent novel therapeutic targets. Furthermore, in an experimental model of AMI, leukocytes appeared to have effects beyond the ischaemic myocardium, with leukocyte recruitment in remote myocardium and in kidneys associated with elevated inflammatory markers and endothelial activation.

Keywords: genomics
myocardial infarction
monocytes
Advisor: Choudhury, R
Politicians, patrons, and the people: influences on targeted government redistribution in Pakistan

Powerful individuals often influence the delivery of government services for their own purposes. Officials may prefer inherently to direct assistance to their own relatives and social contacts (nepotistic preferences). Alternatively, they may use government services strategically in exchange for favors (patronage) or to gain voter support (clientelism). Most existing literature examines these three phenomena separately, or does not distinguish the motivations for politicians’ influence on distribution. Causal identification has also been a problem in the empirical literature. In the first chapter of this thesis, I develop a theoretical model of interaction between three levels of actors: politicians, local patrons, and households. The model allows for politicians and patrons to influence government services for nepotistic, clientelistic, and patronage purposes. In chapters 2-4, I test the predictions of the model using two novel household survey datasets I collected along with my collaborators in rural Punjab, Pakistan. Chapter 2 tests the theoretical predictions for the interaction of politicians, patrons and voters. Chapters 3 and 4 provide quasi-experimental evidence on the causal effect of links with politicians on assistance. I find evidence that politicians exert dramatic influence on the targeting of government assistance in this setting. Consistent with the theoretical model, the most assistance goes to a small “inner circle” of their closest contacts. Politicians assist this “inner circle” based on their inherent preferences, regardless of electoral pressure. When politicians face electoral pressure, they also deliver assistance to a wider group, in particular members of the same clan. In contrast, local patrons do not appear to have significant independent influence over the targeting of the government assistance programs I study, but they do provide other types of assistance to households. Their behavior is more consistent with the idea that they are motivated by inherent preferences for assisting their contacts. The results have implications for the interpretation of empirical literature on nepotism, clientelism, and patronage. They can also inform the policies of donor agencies and civil society organizations who aim to engage or pressure governments to reduce corruption and improve public spending.

Keywords: patronage
clientelism
targeting
Pakistan
Advisor: Fafchamps, M
Catalytic properties of nano ceria in heterogeneous catalysis

There have been many applications of cerium oxide in oxidation catalysis but the understanding of its role in catalysis is rather limited. This research is concerned with the use of nano-size cerium oxide in methane steam reforming reaction. It is found that addition of cerium oxide to the commercial supported Ni catalysts can dramatically reduce the undesirable carbon deposition (through surface oxidation), which is thermodynamically favorable under low steam conditions. In order to understanding the fundamental role of oxidation activity of the cerium oxide, different sizes of nano-crystallined cerium oxides have been carefully prepared by micro-emulsion technique. Their reactivity is clearly shown to be size dependent. We found that ceria particle sizes of lower than 5.1 nm are able to activate molecular oxygen, which accounts for the unprecedentedly reported critical size effect on oxidation. Characterizations by EPR, XPS, TPR suggest that a substantially large quantity of adsorbed oxygen species (O2 -) is preferentially formed in the small size ceria from air. Also, it is found that the oxygen vacancies are formed in the interface of metal and oxide, and the strength of the metal oxide interaction may influence the formation of the efficient oxygen vacancies, which are responsible for the adsorbed surface oxygen.

Keywords: ceria
core shell
Advisor: Tsang, E