8,522 research outputs found

    Better No Longer to Be

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    David Benatar argues that coming into existence is always a harm, and that – for all of us unfortunate enough to have come into existence – it would be better had we never come to be. We contend that if one accepts Benatar’s arguments for the asymmetry between the presence and absence of pleasure and pain, and the poor quality of life, one must also accept that suicide is preferable to continued existence, and that his view therefore implies both anti-natalism and pro-mortalism. This conclusion has been argued for before by Elizabeth Harman – she takes it that because Benatar claims that our lives are ‘awful’, it follows that ‘we would be better off to kill ourselves’. Though we agree with Harman’s conclusion, we think that her argument is too quick, and that Benatar’s arguments for non-pro-mortalism deserve more serious consideration than she gives them. We make our case using a tripartite structure. We start by examining the prima facie case for the claim that pro-mortalism follows from Benatar’s position, presenting his response to the contrary, and furthering the dialectic by showing that Benatar’s position is not just that coming into existence is a harm, but that existence itself is a harm. We then look to Benatar’s treatment of the Epicurean line, which is important for him as it undermines his anti-death argument for non-pro-mortalism. We demonstrate that he fails to address the concern that the Epicurean line raises, and that he cannot therefore use the harm of death as an argument for non-pro-mortalism. Finally, we turn to Benatar’s ro-life argument for non-pro-mortalism, built upon his notion of interests, and argue that while the interest in continued existence may indeed have moral relevance, it is almost always irrational. Given that neither Benatar’s anti-death nor pro-life arguments for non-pro-mortalism work, we conclude that pro-mortalism follows from his anti-natalism, As such, if it is better never to have been, then it is better no longer to be

    TDRSS/user satellite timing study

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    A timing analysis for data readout through the Tracking and Data Relay Satellite System (TDRSS) was presented. Various time tagging approaches were considered and the resulting accuracies delineated. The TDRSS was also defined and described in detail

    PAH emission from Nova Cen 1986

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    The discovery of broad emission features between 3.2 and 3.6 microns were reported in the spectrum of Nova Cen 1986 (V842 Cen) some 300 days following outburst and remaining prominent for several months. The general characteristics of these features are similar to those attributed to polycyclic hydrocarbon (PAH) molecules in other dusty sources, although the relative strengths are different, and these observations provide the first clear evidence for molecular constituents other than graphite particles in the ejecta of novae

    Significance of the late Archaean granulite facies terrain boundaries, Southern West Greenland

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    Three distinct episodes and occurrences of granulite metamorphism in West Greenland are described: (1) the oldest fragmentary granulites occur within the 3.6-Ga Amitsoq gneisses and appear to have formed 200 Ma after the continental crust in which they lie (Spatially associated rapakivi granites have zircon cores as old as 3.8 Ga, but Rb-Sr, whole-rock Pb-Pb, and all other systems give 3.6 Ga, so these granulites apparently represent a later metamorphic event); (2) 3.0-Ga granulites of the Nordlandet Peninsula NW of Godthaab, developed immediately after crustal formation in hot, dry conditions, are carbonate-free, associated with voluminous tonalite, and formed at peak metamorphic conditions of 800 C and 7 to 8 kbar (Synmetamorphic trondhjemite abounds and the activity of H2O has been indicated by Pilar to have varied greatly); and (3) 2.8-Ga granulites south of Godthaab, lie to the south of retrogressed amphibolite terranes. Prograde amphibolite-granulite transitions are clearly preserved only locally at the southern end of this block, near Bjornesund, south of Fiskenaesset. Progressively deeper parts of the crust are exposed from south to north as a major thrust fault is approached. Characteristic big hornblende pegmatites, which outcrop close to the thrust in the east, have been formed by replacement of orthopyroxene. Comparable features were not seen in South Indian granulites. It was concluded that no one mechanism accounts for the origin of all granulites in West Greenland. Various processes have interacted in different ways, and what happened in individual areas must be worked out by considering all possible processes

    The Maynooth grant and the Conservative Party

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    The purpose of this thesis is to examine the impact of the Maynooth Bill upon the Conservative party and the careeer of Sir Robert Pool. Because of the limitations of time and space and in the interest of a concise narrative, a great deal of Peel\u27s Irish program has either not been mentioned or only dealt with in passing: the Devon Commission, the Irish Colleges Bill, and the Charitable Bequests Act are the most notable of these omissions or glosses

    Queer monsters, and Bruno & his speaking queers

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    This multi-genre thesis spans across nonfiction (Queer Monsters), poetry (Bruno & His Speaking Queers), and fiction (A Queer Empire Named Eden) in an attempt to break down the categorical control the hegemonic powers like to assert over not only the arts, but gender and sexuality as well. The creative pieces are unapologetically polemic tackling queer issues and the newfound surge in acceptance for queers across the United States. The creative works question how far queers should assimilate into a hegemonic system that was built with heteronormativity enshrined as one of its cornerstone pillars. The nonfiction piece tracks the author’s own coming out narrative, the poems wrap themselves around the persona character Bruno and his attempts to assimilate into the queer community, and the fiction piece serves as a warning about how opportunists can capitalize off of the queer movement

    Analysis of Dishman Hills Structure and Hydrogeology

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    The structural and hydrogeology of Dishman Hills Conservation Area was interpreted to gain a better picture of its interaction with the Spokane Valley-Rathdrum Prairie aquifer. The rock in this area is Precambrian Ravalli Group with granitic migmatites. This is due to exhumation causing decompression melting in between the bed layers. Other rocks such as amphibolite, gneiss, schist, quartzite, and phyllite are seen along with granitic dikes (WSDNR). This rock type covers all of the Dishman area and is Precambrian in age. Due to tectonic forces in the Spokane area, fractures have also formed within the Precambrian rock. Water will concentrate in fracture zones, known to be areas of groundwater drainage. Many studies show that the water yield on a fracture trace is much greater compared to yields not on fracture traces, with the greatest yield found at intersecting fractures (Fetter, 1994). Using lidar and field measurements, fracture orientations were measured and compared to the stress regime from Hammond (2013). Precipitation and evapotranspiration data were then used to estimate the amount of water that would enter the Spokane aquifer in non-ponded areas. Three-point problems were also created to see groundwater flow direction and to note if water exits these fractures. The calculations suggest that water tends to flow away from the Dishman Hills area. Also, it was found that the groundwater leaving the Dishman Hills area towards the Spokane Valley-Rathdrum Prairie Aquifer ranged between 2.37∗10^7 and 5.92∗10^7 gallons

    X-Ray Crystal Analysis of Acid Salts, and Tris-Ethyl-Sulphonyl Methane: Development of Related Computer Programs

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    The phase problem of X-ray crystallography is stated, some of the methods available for its solution are surveyed and their theoretical background is outlined. ' Three computer programs written by the author, are described. These are a program for scanning three-dimensional density maps, which automatically produces interpolated coordinates for every peak in the map; a program for sorting crystallographic reflexion data into order by the Miller indices; and a program which supplies a suitable weighting-scheme for structure-factor-least-squares refinement. The "ASS" system of crystallographic computer programs is then described with special reference to the method of storing the crystallographic data, and the features which enable it, in some cases, to obtain the positions of all the light atoms automatically, given the position of only the heavy-atom. The crystal structure analysis of tris (ethyl sulphonyl) methane is described, and the structure obtained is compared to that of tris (methyl sulphonyl) methane. A description is given of the course of the structure analyses of three acid salts, potassium hydrogen dianisate, potassium hydrogen dicrotonate and rubidium hydrogen dicrotonate, and their structures, which all contain short hydrogen bonds, are discussed

    A Role for the Somatosensory System in Motor Learning by Observing

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    An influential idea in neuroscience is that action observation activates an observer’s sensory-motor system. This idea has recently been extended to motor learning; observing another individual undergoing motor learning can promote sensory-motor plasticity as well as behavioural changes in both the motor and somatosensory domains. While previous research has suggested a role for the motor system in motor learning by observing, this thesis presents a series of experiments testing the hypothesis that the somatosensory system is also involved in motor learning by observing. The experiments included in this thesis used force field (FF) adaptation as a model of motor learning, a task in which subjects adapt their reaches to a robot-imposed FF. Subjects observed a video showing another individual adapting his or her reaches to a FF, and motor learning by observing was assessed behaviourally following observation. First, we used functional magnetic resonance imaging (fMRI) to assess changes in resting-state functional connectivity (FC) associated with motor learning by observing. We identified a functional network consisting of visual area V5/MT, cerebellum, primary motor cortex (M1), and primary somatosensory cortex (S1) in which post- observation FC changes were correlated with subsequent behavioural measures of motor learning achieved through observation. We then investigated if pre-observation measures of brain function or structure could predict subsequent motor learning by observing. We found that individual differences in pre-observation resting-state FC predicted observation-related gains in motor learning. Subjects who exhibited greater FC between bilateral S1, M1, dorsal premotor cortex (PMd), and left superior parietal lobule (SPL) prior to observation achieved greater motor learning by observing on the following day. In a subsequent experiment, we tested the involvement of the somatosensory system in motor learning by observing using median nerve stimulation and electroencephalogra- phy (EEG). In experiment 1, we showed that interfering with somatosensory cortical processing throughout observation (by delivering median nerve stimulation) can disrupt motor learning by observing. In a follow-up experiment, we assessed pre- to post- observation changes in S1 excitability by acquiring somatosensory evoked potentials (SEPs) using EEG. We showed that SEP amplitudes increased after observing motor learning. Post-observtion SEP increases were correlated with subsequent behavioural measures of motor learning achieved through observation. In a final experiment, we tested if improving subjects’ somatosensory function would enhance subsequent motor learning by observing. Subjects underwent perceptual training to improve their proprioceptive acuity prior to observation. We found that improving proprioceptive acuity prior to observation enhanced the extent to which subjects benefitted from observing motor learning (compared to subjects who had not undergone perceptual training). We further found that post-training increases in proprioceptive acuity were correlated with subsequent observation-related gains in motor performance. Collectively, these studies suggest that motor learning by observing is supported by a fronto-parieto-occipital network in which the somatosensory system is an active element. We have shown that observing motor learning changes somatosensory activity in a behaviourally-relevant manner. Observing motor learning resulted in S1 plasticity that corresponded to the extent of learning achieved through observation. Moreover, manipulating somatosensory activity influenced motor learning by observing. Interfering with somatosensory processing throughout observation disrupted motor learning by observing whereas improving somatosensory function prior to observation enhanced motor learning by observing. These experiments therefore suggest that the somatosensory system is indeed involved in motor learning by observing

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