1,368 research outputs found

    Representation, Rightness, and the Fringe

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    So the central question here is phenomenological: What is the nature of the aesthetic zap? For it is this experience, or its promise, which gives art such a deep hold on human life. But the issue of representation, while secondary, is still pregnant with cognitive implications: Why is representation, of all the devices available to an artist, more likely to shift the odds in favour of eliciting and/or intensifying aesthetic experience? Assuming a Darwinian view of our species, it is likely that the answer to both questions will come from understanding how our capacity to enjoy art grows out of normal cognition

    The Fringe: A Case Study in Explanatory Phenomenology

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    William James’ greatest achievement is, arguably, his analysis of the fringe — or, as he sometimes called it, transitive experience. In trying to understand this vague, elusive, often peripheral aspect of consciousness, James broke new ground. But in so doing he also began to lay down the first stratum of a radically new methodology, one that intersects first- and third-person findings in such a way that each is able to interrogate the other, and so further our understanding of both....\ud \ud But I think it is important to see that explanatory phenomenology can be completely scientific without necessarily having to (1) consider the neural substrate, (2) employ reductive arguments, or (3) operate at the third-person level. If I am right, explanatory phenomenology can be a remarkably plastic member of the set of first-person methodologies for the study of consciousness

    Volition and Property Dualism

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    My overall aim here is to intersect two issues central to Max Velmans’ (2002) wide-ranging paper. The first concerns one of the most vexing problems in consciousness research — how best to approach the terms ‘mental’ and ‘physical’. The second looks at the phenomenology of volition, and the degree to which information presumably necessary for making voluntary conscious decisions is, or is not, present in consciousness

    Strategic adoption of logistics and supply chain management

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    © 2018, Emerald Publishing Limited. Purpose: The purpose of this paper is to develop a thorough understanding of the adoption of logistics and supply chain management (SCM) in practice, particularly at a strategic level, through an investigation of the four perspectives taxonomy of the relationship between logistics and SCM. Design/methodology/approach: Based on a comprehensive literature review, three specific research questions are proposed. The empirical work addresses these questions and comprised three phases: focussed interviews, a questionnaire survey and focus groups. Findings: The findings provide a usage profile of the four perspectives and indicate a divergence between the understanding and adoption of logistics and SCM principles and concepts at a strategic level in firms. The findings also identify the critical success factors (CSFs) and inhibitors to success in addressing this divergence. Research limitations/implications: The insights generated using the authors’ methodologically pluralist research design could be built upon to include case studies, grounded theory and action research. Replicating the research in other geographical areas could facilitate international comparisons. Practical implications: The findings allow practitioners to compare their perspectives on the relationship between logistics and SCM with those of their peers. The CSFs and inhibitors to success provide a rational basis for realising the strategic potential of logistics and SCM in practice. Originality/value: New insights are generated into practitioner perspectives vis-Ă -vis logistics vs SCM. A fresh understanding of those factors which drive and hinder the adoption of strategic SCM is also developed and presented

    Some Techniques Relevant to the Development of a Long Baseline Gravitational Wave Detector Using Laser Interferometry

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    Gravitational radiation is a travelling distortion in foar-dimensional space-time which is predicted by most relativistic theories. This distortion may be detected by monitoring the changes in the separation of test masses. Since the gravitational interaction is so weak appreciable levels of gravitational radiation are only produced by violent astrophysical phenomena in which large masses are accelerated coherently to velocities approaching the speed of light. However, due to the conservation of momentum the lowest order of gravitational radiation is quadrupole and so the source must contain some asymmetry in its dynamics. Chapter 1 is intended to introduce the reader to the concept of gravitational radiation by outlining its properties, describing some of the possible sources and indicating the levels which might be observed by a terrestrial detector. Chapter 1 also includes a brief overview of main detection schemes currently being pursued. Chapter 2 includes a brief overview of the current status of the prototype detector at Glasgow, which uses laser interferometry to monitor the relative lengths of two orthogonal optical cavities, before describing, briefly, the sources of noise which are most likely to limit the sensitivity of this type of system and the levels at which they become important. Theoretical work suggests that to see several gravitational wave events per year a sensitivity to strain, h ~ 10-22 is required and so the levels have been scaled to the proposed 1km long observatory which should have this potential. The following chapters are concerned with experiments related to reducing the effects of some of these possibly limiting sources of noise, in particular fluctuations in the quality of the laser light used to illuminate the optical cavities of the detector. Chapter 3 is concerned with the development of a laser intensity stabilisation system and investigations into limits to its observed performance which included geometry and frequency fluctuations in the laser light. Chapter 4 covers the development of the feedback circuit for the intensity stabilisation system in more depth and describes another circuit designed for the fast frequency stabilisation of an Argon Ion laser. The possible use of optical fibres to reduce the effects of geometry fluctuations in laser light is investigated in Chapter 5. This chapter describes the investigation of the suppression available from a sample fibre and calculates the efficiency with which a fundamental Gaussian beam may be transmitted through a mono-mode fibre. Chapter 6 describes the construction of a data collection system designed to capture pulses in the output of an interferometric gravitational wave detector. Although the prototype detector is probably not sufficiently sensitive to detect likely levels of gravitational radiation the system was tested by sampling data from the prototype system. These data were then used to study the noise statistics of the detector to search for any non-random effects. Chapter 7 briefly describes the state of the gravitational radiation detection effort world-wide and the prospects for future development

    What Feeling Is the "Feeling of Knowing"?

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    Having a word on the tip of our tongue is a mundane and slightly annoying experi- ence. And yet, as Brown’s article helps us see, the theoretical implications of a TOT experience range very widely. The study of TOTs may also turn out to be useful for larger methodological reasons. Here, too, Brown recognizes that the investigation of TOTs offers an especially good example of convergent cognitive analysis, a way to combine phenomenology (e.g., James’s treatment of the fringe) with more objective methods of scientific investigation such as experimental psychology and computer modeling. For what it is worth, I am in complete agreement with Brown’s general approach to the TOT experience. And we also agree on various specific points, though in some cases Brown does not see this.\ud \ud Unfortunately, Brown at times attributes to me views that I simply do not hold; for example, that I take the feeling of knowing to be necessarily veridical or that the feeling of knowing demands a search of all relevant nonconscious information. I want to keep my comments directed toward issues that are of larger importance for the study of consciousness and the fringe and not fuss about our misunderstandings unless they have wider cognitive implications. For this reason I focus on Brown’s discussion in his ‘‘Current Research’’ section and the phenomenology most relevant to it.\ud \ud I believe the chief difficulty with Brown’s article is that it does not address James’s treatment of the feeling of knowing as it operates in a TOT state. This oversight undercuts a good deal of Brown’s specific analysis and helps contribute to his misun- derstanding of my own proposals regarding the role of the fringe in retrieval, monitor- ing, and control and why, as a matter of phenomenology, the feeling of knowing rightly understood is simply another term for the experience of rightness (Mangan, 1991, 1993a, 1993b)

    Towards insect inspired visual sensors for robots

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    Flying insects display a repertoire of complex behaviours that are facilitated by their non-standard visual system that if understood would offer solutions for weight- and power- constrained robotic platforms such as micro unmanned aerial vehicles (MUAVs). Crucial to this goal is revealing the specific features of insect eyes that engineered solutions would benefit from possessing, however progress in exploration of the design space has been limited by challenges in accurately replicating insect vision. Here we propose that emerging ray-tracing technologies are ideally placed to realise the high-fidelity replication of the insect visual perspective in a rapid, modular and adaptive framework allowing development of technical specifications for a new class of bio-inspired sensor. A proof-of-principle insect eye renderer is shown and insights into research directions it affords discussed

    Visual tracking of small animals in cluttered natural environments using a freely moving camera

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    Image-based tracking of animals in their natural habitats can provide rich behavioural data, but is very challenging due to complex and dynamic background and target appearances. We present an effective method to recover the positions of terrestrial animals in cluttered environments from video sequences filmed using a freely moving monocular camera. The method uses residual motion cues to detect the targets and is thus robust to different lighting conditions and requires no a-priori appearance model of the animal or environment. The detection is globally optimised based on an inference problem formulation using factor graphs. This handles ambiguities such as occlusions and intersections and provides automatic initialisation. Furthermore, this formulation allows a seamless integration of occasional user input for the most difficult situations, so that the effect of a few manual position estimates are smoothly distributed over long sequences. Testing our system against a benchmark dataset featuring small targets in natural scenes, we obtain 96% accuracy for fully automated tracking. We also demonstrate reliable tracking in a new data set that includes different targets (insects, vertebrates or artificial objects) in a variety of environments (desert, jungle, meadows, urban) using different imaging devices (day / night vision cameras, smart phones) and modalities (stationary, hand-held, drone operated)

    The implementation of supply chain management theory in practice:an empirical investigation

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    Purpose: The purpose of the research described in this paper is to disentangle the rhetoric from the reality in relation to supply chain management (SCM) adoption in practice. There is significant evidence of a divergence between theory and practice in the field of SCM. Design/methodology/approach: Based on a review of extant theory, the authors posit a new definitional construct for SCM – the Four Fundamentals – and investigated four research questions (RQs) that emerged from the theoretical review. The empirical work comprised three main phases: focussed interviews, focus groups and a questionnaire survey. Each phase used the authors’ definitional construct as its basis. While the context of the paper’s empirical work is Ireland, the insights and results are generalisable to other geographical contexts. Findings: The data collected during the various stages of the empirical research supported the essence of the definitional construct and allowed it to be further developed and refined. In addition, the findings suggest that, while levels of SCM understanding are generally quite high, there is room for improvement in relation to how this understanding is translated into practice. Research limitations/implications: Expansion of the research design to incorporate case studies, grounded theory and action research has the potential to generate new SCM theory that builds on the Four Fundamentals construct, thus facilitating a deeper and richer understanding of SCM phenomena. The use of longitudinal studies would enable a barometer of progress to be developed over time. Practical implications: The authors’ definitional construct supports improvement in the cohesion of SCM practices, thereby promoting the effective implementation of supply chain strategies. A number of critical success factors and/or barriers to implementation of SCM theory in practice are identified, as are a number of practical measures that could be implemented at policy/supply chain/firm level to improve the level of effective SCM adoption. Originality/value: The authors’ robust definitional construct supports a more cohesive approach to the development of a unified theory of SCM. In addition to a profile of SCM understanding and adoption by firms in Ireland, the related critical success factors and/or inhibitors to success, as well as possible interventions, are identified

    Transcriptional adaptation of Mycobacterium tuberculosis within macrophages: Insights into the phagosomal environment

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    Little is known about the biochemical environment in phagosomes harboring an infectious agent. To assess the state of this organelle we captured the transcriptional responses of Mycobacterium tuberculosis (MTB) in macrophages from wild-type and nitric oxide (NO) synthase 2–deficient mice before and after immunologic activation. The intraphagosomal transcriptome was compared with the transcriptome of MTB in standard broth culture and during growth in diverse conditions designed to simulate features of the phagosomal environment. Genes expressed differentially as a consequence of intraphagosomal residence included an interferon ïżœ – and NO-induced response that intensifies an iron-scavenging program, converts the microbe from aerobic to anaerobic respiration, and induces a dormancy regulon. Induction of genes involved in the activation and ïżœ-oxidation of fatty acids indicated that fatty acids furnish carbon and energy. Induction of ïżœE-dependent, sodium dodecyl sulfate–regulated genes and genes involved in mycolic acid modification pointed to damage and repair of the cell envelope. Sentinel genes within the intraphagosomal transcriptome were induced similarly by MTB in the lungs of mice. The microbial transcriptome thus served as a bioprobe of the MTB phagosomal environment
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