Browsing by Keywords "Lighting"
Now showing items 1-20 of 34
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Accuracy limits of distance estimation in visible light systems with RGB LEDs
(IEEE, 2019-09)The distance estimation problem is investigated for visible light positioning (VLP) systems with red-green-blue (RGB) light emitting diodes (LEDs). The accuracy limits on distance estimation are calculated in terms of the ... -
Creating a coordinate database for the lighting of three dimensional art objects
(Bilkent University, 2003)This thesis proposes a Lighting Coordinates Database for the illumination of three-dimensional art objects. Finding and defining the weak points of current lighting methodology reinforces the importance of the need for ... -
A critical analysis of sunlight patches in patient rooms via simulation
(Taylor & Francis, 2008)Recent research on patient recovery has indicated significant improvement in the conditions of patients treated in sunny rooms compared to those treated in shaded rooms. In this study, the amount of sunlight received in ... -
Differences in illumination estimation in #thedress
(Association for Research in Vision and Ophthalmology Inc., 2017)We investigated whether people who report different colors for #thedress do so because they have different assumptions about the illumination in #thedress scene. We introduced a spherical illumination probe (Koenderink, ... -
Effects of coloured lighting on the perception of interior spaces
(SAGE, 2015-02-01)Use of coloured lighting in interior spaces has become prevalent in recent years. Considerable importance is ascribed to coloured lighting in interior and lighting design. The effects of colour on the perception of interior ... -
The Effects of correlated color temperature on sustained attention and mood of university students in learning environments
(Bilkent University, 2015)The aim of this study is to understand the effects of correlated color temperature on sustained attention and mood of university students in learning environments and to compare different color temperatures. The experiment ... -
The effects of correlated color temperature on wayfinding : a study in a virtual airport environment
(Bilkent University, 2013)The aim of the study is to understand the effects of correlated color temperature on wayfinding performance in airports and to compare different color temperatures in order to understand their effects on wayfinding ... -
The effects of correlated colour temperature on wayfinding performance and emotional reactions
(John Benjamins Publishing, 2018)This study investigated travellers’ wayfinding performance according to the correlated colour temperature (CCT) of lighting in a virtual airport environment. In the first phase an experiment was conducted under 3000K ... -
The effects of correlated colour temperature on wayfinding: a study in a virtual airport environment
(Elsevier, 2018)This study was designed to explore the effects of lighting's correlated colour temperature (CCT) on wayfinding performance in airports and to compare different CCTs to understand their effects on wayfinding performance. ... -
Effects of different lighting arrangements on space perception
(Taylor & Francis, 1999)The idea to improve the quality of lighting design in interior spaces has gained importance in the last years. This experimental study concentrateson the quality of lighting and the relation between lighting arrangements ... -
Excitonic improvement of colloidal nanocrystals in salt powder matrix for quality lighting and color enrichment
(OSA - The Optical Society, 2016)Here we report excitonic improvement in color-converting colloidal nanocrystal powders enabled by co-integrating nonpolar greenand red-emitting nanocrystal energy transfer pairs into a single LiCl salt matrix. This leads ... -
Excitonics of semiconductor quantum dots and wires for lighting and displays
(Wiley-VCH Verlag, 2013)In the past two decades, semiconductor quantum dots and wires have developed into new, promising classes of materials for next-generation lighting and display systems due to their superior optical properties. In particular, ... -
Förster resonance energy transfer enhanced color-conversion using colloidal semiconductor quantum dots for solid state lighting
(American Institute of Physics, 2009-10-15)In this paper, we present Förster resonance energy transfer (FRET)-enhanced color-conversion using colloidal semiconductor quantum dot nanocrystals (NCs) to make reddish-orange light-emitting diodes for use in ultraefficient ... -
High-stability, high-efficiency organic monoliths made of oligomer nanoparticles wrapped in organic matrix
(American Chemical Society, 2016)Oligomer nanoparticles (OL NPs) have been considered unsuitable for solid-state lighting due to their low quantum yields and low temperature stability of their emission. Here, we address these problems by forming highly ... -
Highly luminescent CB[7]-based conjugated polyrotaxanes embedded into crystalline matrices
(Wiley-VCH Verlag, 2017)π-Conjugated polymers suffer from low quantum yields (QYs) due to chain–chain interactions. Furthermore, their emission in solid films is significantly quenched due to aggregation leading further decrease in QY. These are ... -
Impact of lighting arrangements and illuminances on different impressions of a room
(Elsevier, 2007)This study explores whether different lighting arrangements (general lighting, wall washing and cove lighting) and different illuminances (500 and 320 lux) could affect the perception of the same space. An experimental ... -
Implementation of high-quality warm-white light-emitting diodes by a model-experimental feedback approach using quantum dot-salt mixed crystals
(American Chemical Society, 2015)In this work, a model-experimental feedback approach is developed and applied to fabricate high-quality, warm-white light-emitting diodes based on quantum dots (QDs) as color-conversion materials. Owing to their unique ... -
Improved InGaN/GaN light-emitting diodes with a p-GaN/n-GaN/p-GaN/n-GaN/p-GaN current-spreading layer
(Optical Society of American (OSA), 2013)This work reports both experimental and theoretical studies on the InGaN/GaN light-emitting diodes (LEDs) with optical output power and external quantum efficiency (EQE) levels substantially enhanced by incorporating ... -
The influence of sustainable design features on indoor environmental quality satisfaction in Turkish dwellings
(Taylor & Francis, 2016)The aim of this paper is to explore the influence of sustainable design features on occupants satisfaction levels with indoor environmental quality (IEQ) aspects in three types of dwellings. Satisfaction level was investigated ... -
Introduction
(Springer, Singapore, 2019)Here we briefly emphasize the importance of lighting for our daily lives as well as its role in energy consumption. We very briefly introduce the problems that need to be addressed and finally summarize the contents of this brief.
