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This paper reviews the literature on occupancy-based lighting control as a prelude to the application of sensor networks to building management. Many buildings include systems to detect occupancy and control building services. Current systems use single measurement points to detect occupancy, and there can be significant uncertainty associated with the measurement of occupancy. Long time delay and high detector sensitivity settings compensate for this uncertainty, but these diminish the savings that could be achieved with more accurate occupancy measurement. More effective control may be provided by more extensive sensing, using a network of occupancy sensors, and more extensive analysis of sensor data. The literature reviewed in this paper establishes the need for an investigation of the performance of sensor networks when used for lighting control.

This paper characterizes human subjective response to spatial distributions of light resulting from different uplight/downlight photometric distributions. An array of pendant-mounted linear fluorescent luminaires illuminated a 12.7×7.2 m room. Eleven light settings were established at constant horizontal illuminance, which differed in the percentage horizontal illuminance contribution from the uplight and downlight components. Two studies are reported where subjects evaluated the light settings using psychophysical assessments; the first study utilized paired comparisons and the second utilized semantic differential scaling. Findings include: 1) the walls and the ceiling contributed to the perception of overall brightness when the work plane illuminance was held constant, 2) the room appeared more spacious when more light was supplied indirectly, and 3) light settings where the indirect component had a horizontal illuminance contribution of 60% or more were favoured.

We tested the hypothesis that a tolerance for logical incongruity characterizes hypnotic responding and is related to reports of duality experiences during age regression and hidden observer responding during suggested analgesia. Contrary to the logical incongruity hypothesis, (a) highly susceptible hypnotic (n = 15) and imagination control (n = 15) subjects (collectively called "reals") failed to differ significantly on any task, (b) measures of logical incongruity did not differentiate consistently between reals and unsusceptible subjects (n = 15) instructed to fake hypnosis, and (c) different measures of logical incongruity failed to correlate significantly with duality reports or hidden observer responding. The differences in responding that did emerge between reals and simulators were accounted for by the different task demands to which subjects were exposed.

/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10.1177/14771535950270020401Lighting Research & Technology, 27, 2, pp. 93-101, 1995 Perceived room brightness: pilot study on the effect of luminance distribution Tiller, D. K.; Veitch, J. A. Perceived room brightness: Pilot study on the effect of luminance distribution D K Tiller DPhil and J A Veitch PhDInstitute for Research in Construction National Research Council of Canada Ottawa, Ontario K1A OR6A version of this paper was published in Lighting Research & Technology, Vol. 27, No. 2, 1995, pp. 93 -101 Summary This paper describes an experiment to investigate the influence of luminance distribution on perceived brightness in interiors. Thirty subjects matched the brightness of mock offices using a dimmer. Two of the four mock offices used in the experiment had relatively uniform luminance distributions, created by ceiling fluorescent lighting equipped with K-12 acrylic lenses. The other two offices had a nonuniform luminance distribution created by substituting parabolic louvres for the acrylic lenses. In control comparisons subjects matched two rooms having the same luminance distribution. In experimental comparisons subjects matched two rooms having different luminance distributions. The rooms with the nonuniform luminance distribution required between five and ten percent less working plane illuminance to match the brightness of the rooms with the uniform luminance distribution. This raises the possibility of modest energy savings through lighting design. RésuméCe document décrit une expérience visant à étudier l'influence de la répartition de la luminance lumineuse sur la perception de la brillance des intérieurs. Trente sujets ont comparé, à l'aide d'un gradateur, la brillance de bureaux simulés. Dans deux des quatre bureaux, la répartition de la luminance, créée par des plafonniers fluorescents munis de diffuseurs en acrylique K-12, était relativement uniforme. Dans les deux autres bureaux, la répartition de la luminance était non uniforme, les plafonniers fluorescents étant pourvus d'écrans-paralumes paraboliques. Lors d'un exercice de référence, les sujets ont comparé deux pièces où la répartition de la luminance était la même. Lors d'un exercice expérimental, ils ont comparé deux pièces où la répartition de la luminance était non uniforme. Par rapport au plan...