49,452 research outputs found

    De la sinophilie à la sinophobie ? : les femmes chinoises sous le regard des voyageurs européens aux XVIIe et XVIIIe siècles

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    Ce mémoire cherche à démontrer les liens qui existent entre la représentation des femmes chinoises et celle de la Chine en général aux XVIIe et XVIIIe siècles. L’historiographie soutient qu’il y a une transition dans la manière de percevoir la Chine qui fait passer celle-ci de généralement positive à négative vers la fin du XVIIIe siècle. René Étiemble qualifie cette évolution de sinophilie/sinophobie et se base principalement sur les échanges philosophiques, scientifiques et théologiques entre la Chine et l’Europe. Ces concepts ont cependant été peu analysés sous l’angle du genre. M’appuyant sur les récits de voyages des diplomates et marchands de cette période, je défends que les représentations des Chinoises évoluent dans plusieurs directions : certaines d’entre elles s’inscrivent dans la mouvance de la sinophilie/sinophobie, alors que d’autres s’écartent de ce cadre théorique. Dans certains cas, la Chinoise devient un truchement par lequel on s’invente l’Empire du Milieu. Dans d’autres situations, la représentation des Chinoises se fait indépendamment de l’image de la Chine, et il convient donc de la concevoir autrement. En observant le corps des Chinoises, les rapports de genre dans le quotidien et la marginalité féminine, ce mémoire a la modeste prétention de vérifier la pertinence du modèle théorique d’Étiemble du point de vue des représentations de genre

    The labour supply and retirement of older workers: an empirical analysis

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    This thesis examines the labour supply of older workers, their movement into retirement, and any movement out of retirement and back into work. In particular the labour force participation, labour supply and wage elasticity and other income elasticity of work hours are estimated for older workers and compared to younger workers. The thesis goes on to look at the movement into retirement for older workers as a whole by examining cohorts by gender, wave and age. The thesis also presents a descriptive and quantitative • examination of the changes in income and happiness that occur as an individual retires. Finally the thesis examines the reasons why an individual may return to work from v . retirement. The results of the findings suggest: that younger workers are significantly more responsive to wage and household income changes than older worker

    The Caribbean Syzygy: a study of the novels of Edgar Mittelholzer and Wilson Harris

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    The problem of racial inheritance - the "search for identity" - is a recurring theme in the criticism of Caribbean literature. It is a pre-occupation with Caribbean writers, affecting both subject matter and literary quality, as FM. Birbalsingh, for example, has shown with reference to the novels of John Hearne and E,R. Braithwaite (Caribbean quarterly Vols. 14, December 1968 and 16, March 1970). This study of the work of Edgar Mittelholzer and Wilson Harris will attempt to show that there are important areas still to be explored relating Caribbean literature to its complex racial and cultural background. Both Mittelholzer and Harris deserve close, critical study in their own right; but a parallel examination reveals similarities and differences which bring into sharper focus wider concerns of Caribbean literature. The two important directions of West Indian writing are more clearly seen: the one, pioneered by Mittelholzer, in which the writer looks outward towards a "parent" culture, and the other looking inward, seeking in its own, complex inheritance the raw material for new and original growth. Mittelholzer and Harris are both Guyanese of mixed racial stock, both deeply concerned with the psychological effects of this mixture, and both writers have a profound awareness of the Guyanese historical and cultural heritage. They also share a deep feeling for the Guyenese landscape which appears in their work as a brooding presence affecting radically -the lives of those who live within i-t. Mittelholzer's attitude to his mixed racial and cultural origins, however, produces in his work a schizophrenic Imbalance while Harris, by accepting racial and cultural complexity as a starting-point, initiates a uniquely creative and experimental art. Mittelholzer, in his approach to history, human character eM landscape, remains a vi "coastal" writer never really concerned (as Harris is) with. the deeper significance of the "Interior" and all that this implies, both in a geographical and psychological sense. The fact that Mittelbolzer's work reflects a psychological imbalance induced by a pre-occupation with racial identity has been demonstrated by Denis Williams in the 1968 Mittelholzer Lectures, and by Joyce Sparer in a series of articles in the Guyana Graphic. Mittelholzer's awareness of this imbalance, however, and his attempt to come to terms with it in his art remain to be examined and documented, as does Harris's attempt to create am "associative" art aimed at healing the breach in the individual consciousness of Caribbean Man. The aim of this study is to demonstrate that Mitteholzer and. Harris, although antithetical in impact and style (each representing an approach to fiction directly opposed to the other) are, in fact, the opposite elements of a dichotomy. Their work illustrates the negative and positive aspects of the racial and cultural schizophrenia of the Caribbean, for both writers in their different ways are preoccupied with (and therefore have embodied in their work) the juxtaposition and, contrasting of apparently irreconcilable emotional and intellectual qualities - the Caribbean Syzygy

    Facial expression recognition and intensity estimation.

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    Doctoral Degree. University of KwaZulu-Natal, Durban.Facial Expression is one of the profound non-verbal channels through which human emotion state is inferred from the deformation or movement of face components when facial muscles are activated. Facial Expression Recognition (FER) is one of the relevant research fields in Computer Vision (CV) and Human-Computer Interraction (HCI). Its application is not limited to: robotics, game, medical, education, security and marketing. FER consists of a wealth of information. Categorising the information into primary emotion states only limit its performance. This thesis considers investigating an approach that simultaneously predicts the emotional state of facial expression images and the corresponding degree of intensity. The task also extends to resolving FER ambiguous nature and annotation inconsistencies with a label distribution learning method that considers correlation among data. We first proposed a multi-label approach for FER and its intensity estimation using advanced machine learning techniques. According to our findings, this approach has not been considered for emotion and intensity estimation in the field before. The approach used problem transformation to present FER as a multilabel task, such that every facial expression image has unique emotion information alongside the corresponding degree of intensity at which the emotion is displayed. A Convolutional Neural Network (CNN) with a sigmoid function at the final layer is the classifier for the model. The model termed ML-CNN (Multilabel Convolutional Neural Network) successfully achieve concurrent prediction of emotion and intensity estimation. ML-CNN prediction is challenged with overfitting and intraclass and interclass variations. We employ Visual Geometric Graphics-16 (VGG-16) pretrained network to resolve the overfitting challenge and the aggregation of island loss and binary cross-entropy loss to minimise the effect of intraclass and interclass variations. The enhanced ML-CNN model shows promising results and outstanding performance than other standard multilabel algorithms. Finally, we approach data annotation inconsistency and ambiguity in FER data using isomap manifold learning with Graph Convolutional Networks (GCN). The GCN uses the distance along the isomap manifold as the edge weight, which appropriately models the similarity between adjacent nodes for emotion predictions. The proposed method produces a promising result in comparison with the state-of-the-art methods.Author's List of Publication is on page xi of this thesis

    A decision model for stochastic optimization of seasonal irrigation-water allocation

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    Optimal water allocation on a seasonal basis is generally a decision taken with uncertainty regarding seasonal crop needs (unknown yield, precipitation and other environmental factors). Decision criteria, such as “irrigating for the good years of production” and "applying a little extra water just in case it is needed by the plant", are consistent with the rational behaviour of stochastic profit maximization. The motivation behind an increase in water allocation (acquiring water rights or reserving water for certain crops) is that of self-protection: it is better to maintain an extra allocation of water than to face potential yield losses due to water constraints on production in those years when potential yields exceed average levels. The stochastic optimization model presented herein is applied to maize in Spain showing that in current economic and technical conditions, the optimal stochastic water allocation under yield uncertainty is 10% higher than the irrigation dose required under certainty (historical average yield), which leads to an 8% higher expected profit than that obtained for an average-yield water application

    Multi-dimensional barrier identification for wind farm repowering in Spain through an expert judgment approach

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    .Spain was one of the pioneers in the deployment of wind energy systems worldwide and thus since 2014 has a potential for repowering that reaches between 3.3 and 8.7 GW in 2021 (12%–32% of its current installed wind capacity). However, despite the technical and economic advantages, we have observed little interest from promoters in the repowering of already amortized wind farms. The aim of the proposed study is to depict the background framework of barriers for repowering wind farms, which is specially affecting to Spain, but that can also extend to other EU countries. Therefore, we conducted a systematic survey study with academics, promoters, financial experts, manufacturers, operators, maintainers and policymakers to identify and understand the existing real and practical barriers. As a result, we have identified 34 major barriers covering five categories: technical issues, economics, environmental considerations, social concerns, and regulatory and administrative hurdles. We then asked the experts to rate these barriers based on their impact or relevance. We found that the experts agree that regulatory and administrative barriers have the maximum impact, while economic, environmental and technical barriers have only a mid-high impact. Therefore, we can conclude that, in general, the Administration must develop a concise and stable regulatory framework for all RES, especially for repowering projects, and carry out a review of both the technical requirements and the incentives schemes, with a focus on energy efficiency.S

    The Electrophysiological Effects of Vestibular Stimulation in Parkinson's Disease

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    A recent study showed that vestibular stimulation can produce long-lasting alleviation of motor and non-motor features in Parkinson’s disease (PD). The improvements observed in motor symptoms were of particular note and may provide an indication as to one of the underlying physiological mechanisms of action for vestibular stimulation. An electrophysiological marker known to be abnormal in PD is the Bereitschaftpotential (BP) of the movement-related cortical potentials (MRCPs). One aim of this thesis was to observe the effects of galvanic vestibular stimulation (GVS) on MRCPs in PD to better understand its underlying physiological mechanisms. Many studies measuring the electrophysiological response to GVS have employed pre- versus post-GVS protocols, limiting observations to only after stimulation. The investigation of the mechanisms during GVS is limited by the large artifacts that contaminate the electroencephalograph (EEG). Previous studies have described pre-processing strategies to remove the GVS-related artifact, but these have many limitations. Thus, another aim of this thesis was to describe an artifact removal strategy using a novel approach of employing Independent Components Analysis (ICA) to identify, quantify and eliminate the GVS-related artifact from the EEG data. Study 1 (n = 11) validated this strategy by successfully removing the GVS-related artifact from MRCP data when manipulating the GVS frequency. Study 2 (n = 9) provided further validation by showing successful removal of the GVS-related artifact associated with a higher GVS intensity. Study 3 applied the methodology validated in the first two studies to a PD sample and found a significant increase in the early BP associated with GVS. This suggests that vestibular stimulation may improve motor features in PD through modulation of underlying pathological oscillations associated with motor dysfunction

    Context-aware software

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    With the advent of PDAs (Personal Digital Assistants), smart phones, and other forms of mobile and ubiquitous computers, our computing resources are increasingly moving off of our desktops and into our everyday lives. However, the software and user interfaces for these devices are generally very similar to that of their desktop counterparts, despite the radically different and dynamic environments that they face. We propose that to better assist their users, such devices should be able to sense, react to, and utilise, the user's current environment or context. That is, they should become context-aware. In this thesis we investigate context-awareness at three levels: user interfaces, applications, and supporting architectures/frameworks. To promote the use of context-awareness, and to aid its deployment in software, we have developed two supporting frameworks. The first is an application-oriented framework called stick-e notes. Based on an electronic version of the common Post-It Note, stick-e notes enable the attachment of any electronic resource (e.g. a text file, movie, Java program, etc.) to any type of context (e.g. location, temperature, time, etc.). The second framework we devised seeks to provide a more universal support for the capture, manipulation, and representation of context information. We call it the Context Information Service (CIS). It fills a similar role in context-aware software development as GUI libraries do in user interface development. Our applications research explored how context-awareness can be exploited in real environments with real users. In particular, we developed a suite of PDA-based context-aware tools for fieldworkers. These were used extensively by a group of ecologists in Africa to record observations of giraffe and rhinos in a remote Kenyan game reserve. These tools also provided the foundations for our HCI work, in which we developed the concept of the Minimal Attention User Interface (MAUI). The aim of the MAUI is to reduce the attention required by the user in operating a device by carefully selecting input/output modes that are harmonious to their tasks and environment. To evaluate our ideas and applications a field study was conducted in which over forty volunteers used our system for data collection activities over the course of a summer season at the Kenyan game reserve. The PDA-based tools were unanimously preferred to the paper-based alternatives, and the context-aware features were cited as particular reasons for preferring them. In summary, this thesis presents two frameworks to support context-aware software, a set of applications demonstrating how context-awareness can be utilised in the ''real world'', and a set of HCI guidelines and principles that help in creating user interfaces that fit to their context of use

    The Moral and Political Status of Microaggressions

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    This dissertation offers a robust philosophical examination of a phenomenon that is morally, socially, and politically significant – microaggressions. Microaggressions are understood to be brief and routine verbal, behavioral, or environmental indignities that, whether intentional or unintentional, convey hostility toward or bias against members of marginalized groups. Microaggressions are rooted in stereotypes and/or bias (whether implicit or explicit) and are connected to broader systems of oppression. Microaggressions are philosophically interesting, since they involve significant ambiguity, questions about speech and communication, and the ability for our speech to encode and transmit bits of meaning. Microaggressions prompt reflection about the nature of blameworthiness and responsibility, especially for unintended acts and harms. They involve questions about how we perceive and treat one another, and whether or not people are treated as true equals in our social and political worlds. For all of these reasons, microaggressions are a critical area in need of philosophical reflection, specifically reflection in feminist philosophy, philosophy of language, moral philosophy, and social and political philosophy. This dissertation seeks to advance the philosophy of microaggressions through three distinct aims: a conceptual aim (chapters 2 and 3), an epistemological aim (chapters 1 and 2), and a moral aim (chapters 4 and 5). The conceptual aim involves clarifying how we should understand and categorize microaggressions. The epistemological aim involves identifying some of the epistemological assumptions undergirding discussions of microaggressions in the literature, including assumptions made by critics of microaggression theory, and arguing for an alternative epistemological framework for theorizing about microaggressions. The moral aim involves better understanding the harms of microaggressions, including their role in reinforcing structures of oppression and unjust social hierarchy. Taken together, these chapters make some progress on the conceptual, epistemological, and moral questions that microaggressions generate, and which philosophers have not yet adequately analyzed. It thus offers a meaningful contribution to the conversations philosophers are beginning to have about the morally and politically salient phenomenon of microaggressions
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