11,290 research outputs found
THE SNAKE AND THE ROUNDABOUT: ETHICAL PARTICULARISM AND THE PATTERNS OF NORMATIVE INDUCTION
Using two examples of ethical choice, Philippa Foot’s snake and the traffic roundabout, this paper offers an account of normative
induction that characterizes particularism and generalism as stages of
normative inquiry, rather than rival accounts of moral knowledge and
motivation.
Ethical particularism holds that the evaluative cannot be “cashed out”
in propositional form, and that it is descriptively “shapeless.” Drawing on
examples from law, this paper claims that, while individual normative
inquiry may be viewed as encountering a shapeless particularist context of
seemingly unlimited non-moral properties, normativity is driven by
repetition of similar situations toward shared practices and descriptive
predication. Rather than retention of epistemic status by defeated reasons,this illustrates retirement of relevant properties and accompanying reasons,transformation of the reasons environment, and a pluralist normative ontology
Motion Sickness Symptomatology of Labyrinthine Defective and Normal Subjects During Zero Gravity Maneuvers
Motion sickness symptomology of labyrinthine defective and normal human subjects during zero gravity maneuver
The Inversion Illusion in Parabolic Flight - Its Probable Dependence on Otolith Function
Comparative observations of upright perception in normal subjects and deaf persons with bilateral labyrinthine defect
Lack of response to thermal stimulation of the semicircular canals in the weightlessness phase of parabolic flight
Caloric nystagmus response to thermal stimulation of semicircular canals in weightlessness phase of parabolic fligh
The triple task technique for studying writing processes : on which task is attention focused ?
The triple task technique measures the time and cognitive effort devoted to specific writing processes by combining directed retrospection with secondary task reaction time (RT). Writing a text is the primary task and rapidly detecting auditory probes to index cognitive effort is the secondary task. The third task is retrospecting and categorizing the contents of working memory at the time of each probe. The present paper reviews studies on the reactivity and validity of the technique. Further, one recent criticism of the method's validity is tested here: namely, that the primary task for the experimenter is not the primary task for the writer, thus distorting the time and effort measurements. We found that time and effort allocated to planning, translating, executing, evaluating, and revising was the same when the writer was encouraged by instructions to focus either on the speed of responding or the accuracy of retrospection instead of the text itself. Because writing requires sustained thought and attention to produce a cumulative product, it is apparently difficult to make text production anything but the primary task. The triple task technique offers a useful alternative to pause analysis and verbal protocols for investigating the functional features of writing
Performance of the OPAL Si-W luminometer at LEP I-II
A pair of compact Silicon-Tungsten calorimeters was operated in the OPAL
experiment at LEP to measure the integrated luminosity from detection of Bhabha
electrons scattered at angles between 25 and 58 mrad from the beam line. In the
eight years from 1993 to 2000 the detector worked first at the Z mass peak and
then at center of mass energies up to 209 GeV. The fine radial and longitudinal
segmentation (2.5mm x 1X0) allowed the radial position of electron and photon
showers to be measured with a resolution of 130-170 microns and a residual
radial bias as small as 7 microns. Reducing the bias in the definition of the
inner acceptance radius was the key element in obtaining an experimental
systematic error on the integrated luminosity of only 3.4 10^-4. The
performance of the detector at both LEP-I and LEP-II is reviewed. Energy
resolution, sensitivity to overlapping electromagnetic showers and sensitivity
to minimum ionizing particles are discussed.Comment: 9 pages, 7 figures, 10th International Conference on Calorimetry in
High Energy Physics. http://3w.hep.caltech.edu/calor02
Motion sickness precipitated in the weightless phase of parabolic flight by Coriolis accelerations
Human motion sickness susceptibility when exposed to Coriolis accelerations during parabolic flight weightlessnes
A singularly perturbed semilinear reaction-diffusion problem in a polygonal domain
The semilinear reaction-di®usion equation ¡"24u+b(x; u) = 0 with Dirichlet bound-ary conditions is considered in a convex polygonal domain. The singular perturbation parameter ε is arbitrarily small, and the “reduced equation” b(x, u0 (x)) = 0 may have multiple solutions. An asymptotic expansion for u is constructed that involves boundary and corner layer functions. By perturbing this asymptotic expansion, we obtain certain sub- and super-solutions and thus show the existence of a solution u that is close to the constructed asymptotic expansion. The polygonal boundary forces the study of the nonlinear autonomous elliptic equation −Dz + f (z) = 0 posed in an infinite sector, and then well-posedness of the corresponding linearized problem
Extragalactic H 2 regions in the UV: Implications for primeval galaxies and quasars
Three extragalactic regions of rapid star formation with red shifts great enough to separate the L alpha region from geocoronal L alpha were observed with the IUE satellite. Only the low metal abundance object had detectable L alpha emission. L alpha is therefore expected to be weak or absent in collapsed primeval galaxies. The detected object has a L alpha H beta identical to that of quasars
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