Browsing RPI Theses Online (Complete) by Subject "Lighting"
Now showing items 1-20 of 34
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A non-contact method for measuring junction temperature of AlGaInP LED array
(Rensselaer Polytechnic Institute, Troy, NY, 2008-12) -
A personal mobile system for self-initiated shifts in Dim-Light Melatonin Onset (DLMO) produced by the automated reporting and reminding of a light exposure/avoidance prescription (LEAP)
(Rensselaer Polytechnic Institute, Troy, NY, 2014-08)Two experiments were performed. In the first experiment, 21 subjects (11 female) participated in a 12-day study. After a 5-day baseline period, participants were given 90-minute advanced sleep/wake schedules for one week. ... -
Alerting effects of light : implications for railway transportation
(Rensselaer Polytechnic Institute, Troy, NY, 2013-08)The findings of the laboratory studies were the first to show that long-wavelength light (630 nm) increases objective measures of alertness and performance during the afternoon and early evening hours. In addition, it was ... -
An accelerated test method for predicting the useful life of an LED driver
(Rensselaer Polytechnic Institute, Troy, NY, 2009-12) -
An approach to reduce AC LED flicker
(Rensselaer Polytechnic Institute, Troy, NY, 2012-08) -
Blind minder : the invention of a simple reminder device for daylight harvesting
(Rensselaer Polytechnic Institute, Troy, NY, 2010-12) -
Changes in electrical and thermal parameters of LED packages under different current and heating stresses
(Rensselaer Polytechnic Institute, Troy, NY, 2013-12)Experiment results showed that the series electrical resistance went through four phases of change; including periods of latency, rapid increase, saturation, and finally a sharp decline just before failure. Formation of ... -
Changes in spectral sensitivity of the human circadian system
(Rensselaer Polytechnic Institute, Troy, NY, 2009-08) -
Characterizing light transmission properties of white LED encapsulants when exposed to heat and short wavelength radiation
(Rensselaer Polytechnic Institute, Troy, NY, 2009-08) -
Characterizing the thermal resistance of alternating current light emitting diodes
(Rensselaer Polytechnic Institute, Troy, NY, 2011-12) -
Effect of different colored background lighting on led glare perception
(Rensselaer Polytechnic Institute, Troy, NY, 2011-08) -
Effect of heat and short-wavelength visible radiation on phosphor-embedded LED encapsulant
(Rensselaer Polytechnic Institute, Troy, NY, 2013-12)It was found that the epoxy with phosphor sample temperature is the key factor in determining the degradation. Epoxy samples with and without embedded phosphor when subjected to heat have a constant degradation rate. ... -
Effects of roadway delineator spacing, size, and height on drivers’ perception and behavior
(Rensselaer Polytechnic Institute, Troy, NY, 2007-12) -
Evaluation of approaches to crosswalk lighting design
(Rensselaer Polytechnic Institute, Troy, NY, 2009-08) -
Exploring mechanisms for circadian phototransduction in Rattus norvegicus using light spectrum
(Rensselaer Polytechnic Institute, Troy, NY, 2012-05) -
Failure analysis of LED array due to rapid power cycling
(Rensselaer Polytechnic Institute, Troy, NY, 2010-12) -
Impact of heat on the light output and chromaticity of direct-emitting and phosphor-converted amber LEDs
(Rensselaer Polytechnic Institute, Troy, NY, 2011-08) -
Impact of weekly lighting condition on performance, sleepiness, and mood
(Rensselaer Polytechnic Institute, Troy, NY, 2014-08)It was hypothesized that lack of daytime circadian stimulus (dim light) would delay circadian phase from the start to the end of the week, resulting in a greater decrement in performance and mood as well as an increase in ... -
Influence of blue and red light on melatonin suppression
(Rensselaer Polytechnic Institute, Troy, NY, 2008-12) -
Investigating melanopsin contribution to scene brightness perception
(Rensselaer Polytechnic Institute, Troy, NY, 2013-12)Experiment 1 used a "Green" stimulus composed of LED illumination peaking at 525 nm and 625 nm, and a "Fuchsia" stimulus composed of LEDs peaking at 465 nm and 625 nm. S-cone stimulation from the Green stimulus was only ...