VictorJuiz/thesis huggingface dataset:
Living in Two Worlds: Intentional Personal Development of Autistic Individuals
Keywords: Autism
High-functioning autism
Asperger syndrome
Adults
Life outcomes
Life-experiences
Self-understanding
Intentional personal development
Future orientation
Meaning making
Emotional understanding
Positive psychology
Strengths and Weaknesses
First-person perspective
Life satisfaction

Despite an increased interest in autism over the last decades, little research exists about life outcomes of autistic adults. The earliest follow-up studies of autistic individuals suggested that self- understanding and conscious efforts to change could be crucial factors in successfully reaching good life outcomes. However, these initial suggestions have not been further investigated. Therefore, this exploratory qualitative study examined the lives of eight highfunctioning autistic adults aged 25 to 63, from their own perspectives, through in-depth, semistructured interviews, to consider the relation of self-understanding and conscious efforts to change—in this study referred to as intentional personal development—to their life outcomes. All participants demonstrated a level of self-understanding beyond what would be predicted by current theoretical models of autism. Their self-understanding was assessed through participants’ self-definitions, meaning-making of life experiences, and understanding of emotions. In their self-definitions, the participants emphasized their abilities and personality characteristics, rather than their disabilities. For their self-defining memories, as indicators of their meaning making of life experiences, most participants chose positive experiences related to their personal development. Their autobiographical accounts revealed that most participants possess a large iii repertoire of emotion words, supporting an understanding of emotions. When a good life outcome is defined traditionally—as being employed, living independently, and having social relationships—this study, contrary to expectations, did not provide overwhelming evidence for the significant role of intentional personal development in achieving this. However, when a good life outcome is defined in terms of achieving personal excellence, then the study did provide confirmation of intentionality as important to attaining good life outcomes. This study therefore suggests that traditional life outcome measures are inadequate for assessing the life outcomes of autistic individuals because such measures do not take into account the individuals’ own sense of satisfaction with themselves and with their lives.
Branch Plate-to-circular Hollow Structural Section Connections
Keywords: steel structures
hollow structural sections
connections
finite element analysis
structural engineering
welded
circular hollow sections
static loading
tubes
branch plate
stiffened connections
grout filled

Although branch plate connections with circular hollow section (CHS) members are simple to fabricate and cost-effective, they are generally very flexible under low load application resulting in the limit states design resistance being governed by an imposed deformation limit. Restricting the ultimate capacity of a branch plate connection by a deformation limit results in the inherent strength of the CHS member being under-utilized, highlighting the need to develop connection stiffening methods. Two methods to stiffen branch plate-to-CHS connections are examined: a through plate connection and a grout-filled CHS branch plate connection. Further, the current design guidelines of various plate-to-CHS connection types are reexamined including the effect of chord axial stress and chord length on connection behaviour. Finally, the behaviour of connections with non-orthogonal or skew plate orientation, which has not previously been examined, was studied in depth.The behaviour of these uniplanar connection types under quasi-static axial loading was studied through 16 large-scale laboratory experiments and 682 numerical finite element analyses, as well as an extensive review of all previous international experimental and numerical findings. The extensive study formed the basis for a complete set of proposed design guidelines and provided insight into plate-to-CHS connection behaviour. For all plate-to-CHS connection types, the plate thickness is shown to effect connection capacity, though previously this was thought not to have significant impact on connection behaviour. The existing ideology of using the same design recommendations for tension- and compression-loaded connections, which was developed from compression results, under-utilizes an inherent increase in capacity provided by a connection primarily loaded in tension. As such, the recommended design guidelines split the two load senses into separate expressions that reflect the difference in behaviour. Stiffened through plate connection behaviour was determined to be the summation of branch plate behaviour in compression and tension, leading to a significant increase in capacity and identical behaviour regardless of branch load sense. The skewed branch plate connection behaviour was found to relate directly to the established behaviour of longitudinal and transverse plate connections. A design function was developed that interpolates the capacities of intermediate angles by using the proposed design recommendations of the two extreme connection types. Finally, the examination of chord axial stress and chord length for plate-to-CHS connections yielded results similar to previous international studies on CHS-to-CHS connections. The effect of chord length, however, has wide-reaching implications as to how experimental and numerical FE research programs are developed.
The Physiological Ecology of C3-C4 Intermediate Eudicots in Warm Environments
Keywords: C4 photosynthesis
ecophysiology

The C3 photosynthetic pathway uses light energy to reduce CO2 to carbohydrates and other organic compounds and is a central component of biological metabolism. In C3 photosynthesis, CO2 assimilation is catalyzed by ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco), which reacts with both CO2 and O2. While competitive inhibition of CO2 assimilation by oxygen is suppressed at high CO2 concentrations, O2 inhibition is substantial when CO2 concentration is low and O2 concentration is high; this inhibition is amplified by high temperature and aridity (Sage 2004). Atmospheric CO2 concentration dropped below saturating levels 25-30 million years ago (Tipple & Pagani 2007), and the C4 photosynthetic pathway is hypothesized to have first evolved in warm, low latitude environments around this time (Christin et al. 2008a). The primary feature of C4 photosynthesis is suppression of O2 inhibition through concentration of CO2 around Rubisco. This pathway is estimated to have evolved almost 50 times across 19 angiosperm families (Muhaidat et al. 2007), a remarkable example of evolutionary convergence. In several C4 lineages, there are species with photosynthetic traits that are intermediate between the C3 and C4 states, known as C3-C4 intermediates. In two eudicot genera, Flaveria (Asteraceae) and Alternanthera (Amaranthaceae), there is evidence that these species represented an intermediate state in the evolution of the C4 pathway (McKown et al. 2005; Sanchez-del Pino 2009). The purpose of this thesis is to ascertain the specific benefits to plant carbon balance and resource-use efficiencies of the C3-C4 pathway relative to C3 species, particularly at low CO2 concentrations and high temperatures, factors which are thought to have been important in selecting for C3-C4 traits (Ehleringer et al. 1991). This will provide information on the particular advantages of the C3-C4 pathway in warm, often arid environments and how these advantages may have been important in advancing the initial stages of C4 evolution in eudicots. This thesis addresses the physiological intermediacy of previously uncharacterized C3-C4 species of Heliotropium (Boraginaceae); the water- and nitrogen-use efficiencies of C3-C4 species of Flaveria; and the photosynthetic performance and acclimation of C3, C4 and C3-C4 species of Heliotropium, Flaveria and Alternanthera grown at low and current ambient CO2 levels and high temperature.
Cryptography: Leakage Resilience, Black Box Separations, and Credential-free Key Exchange
Keywords: Cryptography
Theory

We study several basic problems in cryptography: Leakage resilient cryptography: cryptographic schemes are often broken through side-channel attacks on the devices that run them. Such attacks typically involve an adversary that is within short distance from the device, and is able to measure various physical characteristics of the device such as power consumption, timing, heat, and sound emanation. We show how to immunize any cryptographic functionality against arbitrary side-channel attacks using the recently achieved fully homomorphic encryption, and a single piece of secure hardware that samples from a public distribution. Our secure hardware never touches any secret information (such as a private key) and is testable in the sense that its inputs are not influenced by user or adversarial inputs. Credential-free key exchange and sessions: One of the most basic tasks in cryptography is to allow two parties that are connected by a completely insecure channel to communicate securely. Typically, the first step towards achieving this is an exchange of a session key. Such an exchange normally requires an infrastructure, where, for example, public keys of users are stored, and can be securely retrieved. However, often such an infrastructure does not exist, or is too costly to maintain. In such a setting an adversary can always be the Man-In-The-Middle and intercept all communications. However, we argue that a meaningful level of security can still be achieved. We present a definition of secure key exchange in a setting without any infrastructure, and describe a protocol that achieves that type of security. The idea is that an adversary should either know nothing about the session key produced by the protocol, or be forced to participate in two independent instances of the protocol Black-box separations: A complementary aspect of cryptographic research is the study of the limits of cryptographic assumptions. Basing constructions on weaker assumptions gives us more confidence in their security. We therefore wish to find, for each standard cryptographic assumption, what tasks cannot be solved based solely on that assumption. In this thesis we study the limits of a very basic public key primitive: trapdoor permutations (TDPs). We show that TDPs cannot be used to construct Identity Based Encryption or a stronger type of TDPs called correlation secure TDPs. Correlation secure TDPs have been used to build chosen-ciphertext secure public key encryption scheme -- a primitive with a wide range of theoretical and practical applications.
Controlled Human Exposures to Concentrated Ambient Fine Particles and Ozone: Individual and Combined Effects on Cardiorespiratory Outcomes
Keywords: blood pressure
air pollution
particulate matter
ozone
inflammation
vasculature
controlled human exposures
concentrated ambient particles
vascular dysfunction
heart rate variability
asthma
IL-6
cardiovascular
cardiorespiratory
neutrophils
flow-mediated dilatation

Epidemiological studies have shown strong and consistent associations between exposure to air pollution and increases in morbidity and mortality. Key air pollutants that have been identified include fine particulate matter (PM) and ozone (O3), both major contributors to smog. However, there is a lack of understanding of the mechanisms involved and the relative contributions of individual pollutants. A controlled human exposure facility was used to carry out inhalation studies of concentrated ambient fine particles (CAP), O3, CAP+O3 and filtered air following a randomized design. Exposures were 2 hrs in duration at rest. Subjects included mild asthmatics and non-asthmatics. This thesis focuses on acute cardiovascular responses including blood pressure (BP), brachial artery reactivity (flow-mediated dilatation [FMD]) and markers of systemic inflammation (blood neutrophils and interleukin [IL]-6). Results showed that for CAP-containing exposures (CAP, CAP+O3) there were small but significant transient increases in diastolic BP (DBP) during exposures. Furthermore, neutrophils and IL-6 increased 1 - 3 hrs after and FMD decreased 20 hrs after CAP-containing exposures. Responses to O3 were smaller, comparable to filtered air. The data suggests that adverse responses were mainly driven by PM. The DBP increase was rapid-developing and quick to dissipate, which points to an autonomic irritant response. The magnitude of the DBP increase was strongly negatively associated with the high frequency component of heart rate variability, suggesting parasympathetic withdrawal as a mechanism. In comparison, IL-6, neutrophil and FMD responses were slower to develop, indicative of an inflammatory mechanism. An intriguing finding was that IL-6 increased 3 hrs after CAP, but not after CAP+O3. Further investigation revealed that exposure to CAP+O3 in some individuals may trigger a reflex inhibition of inspiration, decreasing their tidal volume and inhaled pollutant dose, leading to a reduction in systemic IL-6, a potential protective mechanism. Together the findings support the epidemiological evidence of adverse fine PM health effects. Many questions remain to be answered about the health effects of air pollution including a better understanding of how inhaled pollutants result in cardiovascular effects. It is hoped that the insights gained from this thesis will advance the understanding of air pollution health effects.
Judicial Responses to the Indefinite Detention of Non-citizens Subject to Removal Orders: A Comparative Study of Australia, the United Kingdom and Canada
Keywords: comparative law
immigration law
national security law
citizenship
public law

In the period 2004-2007, the highest courts of Australia, the United Kingdom and Canada handed down judgments on the legality of the indefinite detention of non-citizens, specifically non-citizens subject to a removal order whose removal was frustrated. Each of the governments claimed that its intention to remove the non-citizens if and when it became viable to do so sufficed to establish that their detention fell within an ‘immigration’ exception to non-citizens’ rights. The cases thus raised fundamental questions about the relationship between non-citizens’ rights and governments’ power to control national borders. I argue that the indefinite detention of a non-citizen subject to a removal order is illegal. The detention of a non-citizen subject to a removal order is lawful if it can be justified as a proportionate measure to effect his or her removal. Indefinite detention fails this proportionality test and as such is an unlawful violation of a non-citizen’s rights. I develop my argument through case studies from the three jurisdictions. I argue that the law of all three jurisdictions contained ample resources to support a ruling that indefinite detention was unlawful. The question then arises as to why this view did not prevail in every jurisdiction. I demonstrate that, taking into account variations in legal frameworks and doctrines, a judge’s response to indefinite detention is at base determined by his or her answer to the question ‘does a non-citizen, against whom a valid removal order has been made, retain a right to liberty?’ The judge’s answer to this question flows through his or her adjudication on the scope of ‘immigration’ exceptions to legal protections of the personal liberty of non-citizens considered in the case studies. I consider the best justification for the view that a removal order revokes a non-citizen’s right to liberty, provided by John Finnis. I argue that it rests on questionable understandings of citizenship, and in operation inevitably undermines the values of community solidarity it seeks to promote.
The Microcanonical Density of States and Causal Dynamical Triangulations
Keywords: General Relativity
Quantum Gravity

Brown and York's gravitational microcanonical density of states is extended to general spacetime dimension and shown to be dependent upon features of the 4 dimensional gravitational action for its interpretation. Black hole entropy is calculated from the density of states path integral in general spacetime dimension, and the interpretation is shown to be likewise dependent upon the dimension of spacetime. The entropy of de Sitter and Rindler horizons are calculated using the black hole density of states and the notion of local horizon entropy density is shown to be supported. The applicability of the microcanonical ensemble to black hole mechanics is discussed at a fundamental level focussing on the absence of angular velocity as an external parameter in the gravitational Hamiltonian. The rotational ensemble and a new ensemble - the angular momentum ensemble - are introduced following Jaynes' information theory approach to statistical mechanics and proposed as more compelling candidates to calculate black hole entropy as a function of state. A program to calculate the density of states path integral non-perturbatively using causal dynamical triangulations is initiated. Regge calculus expressions for extrinsic curvature are extended to the case of Lorentzian hypersurfaces and used to derive Regge calculus expressions for quasilocal energy-momentum. The Regge version of the black hole density of states action is derived and specialised to the 3d and 4d spacetime constructions of causal dynamical triangulations. Finally, the recent suggestion that entropy is observer dependent is shown to be incompatible with the Tolman law for the equilibrium temperature in a gravitational field.
Augustine on Suffering and Order: Punishment in Context
Keywords: suffering
evil
punishment
order
Augustine
privation
privatio
ordo
sin

Augustine of Hippo argues that all suffering is the result of the punishment of sin. Misinterpretations of his meaning are common since isolated statements taken from his works do give misleading and contradictory impressions. This dissertation assembles a comprehensive account of Augustine’s understanding of the causes of suffering to show that these views are substantive and internally consistent. The argument of the dissertation proceeds by confronting and resolving the apparent problems with Augustine’s views on sin and punishment from within the broader framework of his anthropology and metaphysics. The chief difficulty is that Augustine gives two apparently irreconcilable accounts of suffering as punishment. In the first, suffering is viewed as self-inflicted because sin is inherently self-damaging. In the second, God inflicts suffering in response to sin. This dissertation argues that these views are united by Augustine’s concern with the theme of ‘order.’ The first account, it argues, is actually an expression of Augustine’s doctrine that evil is the privation of good; since good is for Augustine synonymous with order, we can then see why he views all affliction as the concrete experience of disorder brought about by sin. This context in turn allows us to see that, by invoking the notion of divinely inflicted punishment in both its retributive and remedial forms, Augustine wants to show that disorder itself is embraced by order, either because disorder itself must obey laws, or because what is disordered can be reordered. In either case, Augustine’s ideas of punishment may be seen as an expression of his conviction that order in the universe is unassailable. It is hoped that these observations contribute to a greater appreciation not only of Augustine’s theory of punishment, but also of the extent to which the theme of order is fundamental to his thought.
Materials Engineering for Stable and Efficient PbS Colloidal Quantum Dot Photovoltaics
Keywords: photovoltaics
lead sulfide
ionic passivation
nanocrystal
quantum dot
stability

Environmental and economic factors demand radical advances in solar cell technologies. Organic and polymer photovoltaics emerged in the 1990's that have led to low cost per unit area, enabled in significant part by the convenient manufacturing of roll-to-roll-processible solution-cast semiconductors. Colloidal quantum dot solar cells dramatically increase the potential for solar conversion efficiency relative to organics by enabling optimal matching of a photovoltaic device's bandgap to the sun's spectrum. Infrared-absorbing colloidal quantum dot solar cells were first reported in 2005. At the outset of this study in 2007, they had been advanced to the point of achieving 1.8% solar power conversion efficiency. These devices degraded completely within a few hours’ air exposure. The origin of the extremely poor device stability was unknown and unstudied. The efficiency of these devices was speculated to be limited by poor carrier transport and passivation within the quantum dot solid, and by the limitations of the Schottky device architecture. This study sought to tackle three principal challenges facing colloidal quantum dot photovoltaics: stability; understanding; and performance. In the first part of this work, we report the first air-stable infrared colloidal quantum dot photovoltaics. Our devices have a solar power conversion efficiency of 2.1%. These devices, unencapsulated and operating in an air atmosphere, retain 90% of their original performance following 3 days’ continuous solar harvesting. The remarkable improvement in device stability originated from two new insights. First, we showed that inserting a thin LiF layer between PbS film and Al electrode blocks detrimental interfacial reactions. Second, we proposed and validated a model that explains why quantum dots having cation-rich surfaces afford dramatically improved air stability within the quantum dot solid. The success of the cation-enrichment strategy led us to a new concept: what if - rather than rely on organic ligands, as all prior quantum dot photovoltaics work had done - one could instead terminate the surface of quantum dots exclusively using inorganic materials? We termed our new materials strategy ionic passivation. The goal of the approach was to bring our nanoparticles into the closest possible contact while still maintaining quantum confinement; and at the same time achieving a maximum of passivation of the nanoparticles' surfaces. We showcase our ionic passivation strategy by building a photovoltaic device that achieves 5.8% solar power conversion efficiency. This is the highest-ever solar power conversion efficiency reported in a colloidal quantum dot device. More generally, our ionic passivation strategy breaks the past tradeoff between transport and passivation in quantum dot solids. The advance is relevant to electroluminescent and photodetection devices as well as to the record-performing photovoltaic devices reported herein.