10,264 research outputs found

    Self-esteem and locus of control as modifiers of the relationship between objective health and subjective health in the elderly : a thesis presented in partial fulfilment of the requirements for the degree of Master of Arts in Psychology at Massey University

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    An investigation was undertaken to explore the function of self­ esteem and locus of control as possible moderators of the relationship between objective health and subjective assessments of health in the elderly. Subjects were 102 individuals, aged 60 to 94 years, drawn from seven preselected residences for the elderly, in two communities. Each subject was interviewed and measures of objective health, subject­ive health, personality and well-being were taken as well as demographic information. The hypothesis predicted that the personality variables, self-esteem and locus of control would each interact with objective health, to moderate between objective health and subjective assess­ments of health. The results of analyses revealed that neither self­ esteem nor locus of control consistently interacted with objective health to predict subjective assessments of health. The main effects of self-esteem and objective health were, however, found to demonstrate strong and independent relationships to subjective assessments of health. Of the two types of variables objective health was found to have the strongest relationship to subjective assessments of health. This finding is in accord with previous research. Implications of the relationship between both variables and subjective health were discussed, as were methodological implications of the study

    Confinement and the effective string theory in SU(N->oo) : a lattice study

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    We calculate in the SU(6) gauge theory the mass of the lightest flux loop that winds around a spatial torus, as a function of the torus size, taking care to achieve control of the main systematic errors. For comparison we perform a similar calculation in SU(4). We demonstrate approximate linear confinement and show that the leading correction is consistent with what one expects if the flux tube behaves like a simple bosonic string at long distances. We obtain similar but less accurate results for stable (k-)strings in higher representations. We find some evidence that for k>1 the length scale at which the bosonic string correction becomes dominant increases as N increases. We perform all these calculations not just for long strings, up to about 2.5`fm' in length, but also for shorter strings, down to the minimum length, lc = 1/Tc, where Tc is the deconfining temperature. We find that the mass of the ground-state string, at all length scales, is not very far from the simple Nambu-Goto string theory prediction, and that the fit improves as N increases from N=4 to N=6. We estimate the mass of the first excited string and find that it also follows the Nambu-Goto prediction, albeit more qualitatively. We comment upon the significance of these results for the string description of SU(N) gauge theories in the limit of infinite N.Comment: 21 pages, 5 figure

    Impact of the California sea lion (Zalophus californianus) on salmon fisheries in Monterey Bay, California

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    To assess the impact of California sea lions (Zalophus californianus) on salmon fisheries in the Monterey Bay region of California, the percentages of hooked fish taken by sea lions in commercial and recreational salmon fisheries were estimated from 1997 to 1999. Onboard surveys of sea lion interactions with the commercial and recreational f isheries and dockside interviews with fishermen after their return to port were conducted in the ports of Santa Cruz, Moss Landing, and Monterey. Approximately 1745 hours of onboard and dockside surveys were conducted—924 hours in the commercial fishery and 821 hours in the recreational fishery (commercial passenger fishing vessels [CPFVs] and personal skiffs combined). Adult male California sea lions were responsible for 98.4% of the observed depredations of hooked salmon in the commercial and recreational fisheries in Monterey Bay. Mean annual percentages of hooked salmon taken by sea lions ranged from 8.5% to 28.6% in the commercial fishery, 2.2% to 18.36% in the CPFVs, and 4.0% to 17.5% in the personal skiff fishery. Depredation levels in the commercial and recreational salmon fisheries were greatest in 1998—likely a result of the large El Niño Southern Oscillation (ENSO) event that occurred from 1997 to 1998 that reduced natural prey resources. Commercial fishermen lost an estimated 18,031−18,031−60,570 of gear and 225,833−225,833−498,076 worth of salmon as a result of interactions with sea lions. Approximately 1.4−6.2% of the available salmon population was removed from the system as a result of sea lion interactions with the fishery. Assessing the impact of a growing sea lion population on fisheries stocks is difficult, but may be necessary for effective fisheries management

    Classical Opacity

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    Philosophy and Phenomenological Research, EarlyView
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