scholarly journals Development of alternative rear flickering light system

2020 ◽  
Vol 1 (1) ◽  
pp. 21-25
Author(s):  
Mastura Ibrahim ◽  
Siti Aishah Wahid ◽  
Sullyfaizura Mohd Rawi
Keyword(s):  
Blue Light ◽  
The Other ◽  
Lighting System ◽  
Flickering Light ◽  
Light System ◽  
Red Color

The lighting system of a car consist of lighting and signaling devices mounted to the front, rear and sides. The car has equipped with blinking turn signals to letting information for the other drivers. Sometimes the drivers didn’t noticed that the rear flickering light is not blinking. This condition is a major cause of accidents. The study aim to develop the Alternative Rear Flickering Light System. It is designed to turn the brake lights in flashing mode to replace the broken rear flickering signal. At the same time, a blue light indicator is placed on the dashboard to alert the driver. The system uses the Arduino programming to create hardware or programs for vehicles’ flickering light. The programming of Arduino has been tested for brake lamp (red color), blinking testing (right and left signal) and alternative flickering (brake lamp blinking). The result has been successful for several attempts the coding on Arduino. This system solves of the main problems encountered for every driver when the rear flickering light is not working. This can also turn the other drivers to be aware of the warning given on the headlights.

Street Lamps Monitoring System Using Relay Control Technique

2015 ◽  
Vol 781 ◽  
pp. 366-369
Author(s):  
Eakdanai Kavichai ◽  
Chirdpong Deelertpaiboon
Keyword(s):  
User Interface ◽  
Cost Effective ◽  
Control Technique ◽  
Lighting System ◽  
Control Room ◽  
Relay Control ◽  
Labview Software ◽  
Light System ◽  
Current Consumption ◽  
Street Lamp

This research proposes a simple but very effective method to determine faulty street lamps by utilizing a microcontroller associated with relay control technique to analyze the current consumption of the lamps. With such approach, the lighting system can automatically report the number and the position of the faulty street lamp to the operator in the control room. As a consequence, the faulty street lamp can be quickly repaired. The user interface and controller are programmed in LabVIEW software. The result is verified by modeling street light system using five 100 watts incandescent light bulbs connected in parallel. The results of this research can be applied to improve the existing street light system especially in Thailand. Furthermore, equipment used in this research is cost effective.

scholarly journals Characterization of an Unstable Allele of the Arabidopsis HY4 Locus

Genetics ◽  
1998 ◽  
Vol 149 (3) ◽  
pp. 1575-1585
Author(s):  
Edward P Bruggemann ◽  
Bernard Doan ◽  
Korie Handwerger ◽  
Gisela Storz
Keyword(s):  
Fast Neutron ◽  
Blue Light ◽  
Large Deletion ◽  
The Other ◽  
Epigenetic Mechanisms ◽  
Loss Of Function ◽  
Wild Type ◽  
Unusual Behavior ◽  
Recessive Lethal

Abstract The Arabidopsis HY4 gene encodes the nonessential blue light photoreceptor CRY1. Loss-of-function hy4 mutants have an elongated hypocotyl phenotype after germination under blue light. We previously analyzed 20 independent hy4 alleles produced by fast neutron mutagenesis. These alleles were grouped into two classes based on their genetic behavior and corresponding deletion size: (1) null hy4 alleles that were semidominant over wild type and contained small or moderate-sized deletions at HY4 and (2) null hy4 alleles that were recessive lethal and contained large HY4 deletions. Here we describe one additional fast neutron hy4 mutant, B144, that did not fall into either of these two classes. Mutant B144 was isolated as a heterozygote with an intermediate hy4 phenotype. One allele from this mutant, hy4-B144Δ, contains a large deletion at HY4 and is recessive lethal. The other allele from this mutant, HY4-B144*, appears to be intact and functional but is unstable and spontaneously converts to a nonfunctional hy4 allele. In addition, HY4-B144* is lethal in homozygotes and suppresses local recombination. We discuss genetic and epigenetic mechanisms that may account for the unusual behavior of the HY4-B144* allele.

scholarly journals FACTORS INFLUENCING LIGHT SCATTERING IN THE EYE

2009 ◽  
Vol 46 (3) ◽  
pp. 37-42 ◽  
Author(s):  
G. Ikaunieks ◽  
M. Ozolinsh ◽  
A. Stepanovs ◽  
V. Lejiete ◽  
N. Reva
Keyword(s):  
Light Scattering ◽  
Blue Light ◽  
Spectral Dependence ◽  
Stray Light ◽  
Yellow Filter ◽  
Factors Influencing ◽  
Red Color ◽  
Direct Compensation ◽  
Reduced Light ◽  
Retinal Straylight

FACTORS INFLUENCING LIGHT SCATTERING IN THE EYEOur vision in the twilight or dark is strongly affected by the intraocular light scattering (straylight). Of especial importance is to assess this phenomenon in view of the night driving. The authors have studied the spectral dependence of retinal stray-light and estimated the possibility to reduce it with yellow filters and small apertures. For the measurements the direct compensation flicker method was used. The results show that this spectral dependence is close to Rayleigh's scattering (∝λ-4). As could be expected from the known data, the yellow filter should reduce retinal straylight, especially for blue light. However, in the experiments this scattering was not removed with such a filter but instead slightly increased. The optical apertures reduced light scattering in the eye, especially for red color.

scholarly journals Growth and Acclimation of In Vitro-Propagated M9 Apple Rootstock Plantlets under Various Visible Light Spectrums

Agronomy ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1017
Author(s):  
Guem-Jae Chung ◽  
Jin-Hui Lee ◽  
Myung-Min Oh
Keyword(s):  
Stomatal Conductance ◽  
Blue Light ◽  
Photosynthetic Rate ◽  
Light Quality ◽  
Red Light ◽  
High Ratio ◽  
The Other ◽  
Ex Vitro ◽  
Apple Rootstock

This study aimed to explore the suitable light quality condition for ex vitro acclimation of M9 apple plantlets. Light quality treatments were set as followed; monochromatic LEDs (red (R), green (G), blue (B)) and polychromatic LEDs (R:B = 7:3, 8:2 and 9:1; R:G:B = 6:1:3, 7:1:2 and 8:1:1). Plant height of R, R9B1, and R8G1B1 treatments were significantly higher than the other treatments. The number of leaves and SPAD value of B were significantly higher than the other treatments. Root fresh weights of R9B1 and R7G1B2 treatments showed an increase of at least 1.7-times compared to R, G and R8B2. R8G1B1 accumulated higher starch contents than the other treatments. Photosynthetic rate of R9B1 and R8B2 were significantly higher than the other treatments. In terms of stomatal conductance and transpiration rate, treatments with high blue ratio such as B, R7B3 had higher values. Rubisco concentration was high in R and B among monochromatic treatments. In conclusion, red light was effective to increase photosynthetic rate and biomass and blue light increased chlorophyll content and stomatal conductance. Therefore, for R9B1 and R8G1B1, a mixture of high ratio of red light with a little blue light would be proper for the acclimation of in vitro-propagated apple rootstock M9 plantlets to an ex vitro environment.

scholarly journals Chromatic Adaptation in MarineSynechococcus Strains

2001 ◽  
Vol 67 (2) ◽  
pp. 991-994 ◽  
Author(s):  
Brian Palenik
Keyword(s):  
Blue Light ◽  
The Other ◽  
Chromatic Adaptation

ABSTRACT Characterization of two genetically distinct groups of marineSynechococcus sp. strains shows that one, but not the other, increases its phycourobilin/phycoerythrobilin chromophore ratio when growing in blue light. This ability of at least some marineSynechococcus strains to chromatically adapt may help explain their greater abundance in particular ocean environments than cyanobacteria of the genus Prochlorococcus.

scholarly journals Dim blue light colour reduces the activities and improves the performance of Indian River broilers under Egyptian conditions

2021 ◽  
Vol 72 (3) ◽  
pp. 3171
Author(s):  
TM MOUSA-BALABEL ◽  
SA AL-MIDANY ◽  
WZ ALGAZZAR
Keyword(s):  
Body Weight ◽  
Light Intensity ◽  
Blue Light ◽  
Body Weight Gain ◽  
Broiler Chicks ◽  
Lighting System ◽  
Feed Conversion ◽  
Virus Antibody ◽  
Indian River ◽  
Foot Pad

Poultry producers accustomed to use light colours in broiler production as atrial to increase their productivity, especially in the developing countries to cover the animal protein gap. This experiment was planned to study the effect of different blue light colour intensities (high, medium and dim) on a recently imported Indian River (IR) broilers to Egypt. In this study, 270 one-day old Indian River broiler chicks were used. The birds were exposed to high blue light intensity (HBLI), medium blue light intensity (MBLI) and dim blue light intensity (DBLI), through a monochromatic lighting system that was installed in different rooms for 24 hours daily. The birds were randomly divided and housed into three well controlled pens of 5.46 m2 with three replicates of 30 each using a density of 17 birds/m2 in the room. The results showed that the broilers reared under DBLI had a significantly (p< 0.05) higher body weight, body weight gain, Newcastle disease virus antibody titer and foot pad dermatitis with obviously, economic Feed conversion ratio (FCR) and low activities and heterophyil/lymphocyte ratio in comparing with (MBLI) and (HBLI). In conclusion, poultry producer can use dim blue light in their farms to reduce the activities and increase the productivity of the birds.

Misty Mars

2020 ◽  
pp. 55-69
Author(s):  
David A. Weintraub
Keyword(s):  
Nineteenth Century ◽  
Blue Light ◽  
Important Research ◽  
Research Techniques ◽  
Red Color

This chapter considers the invented craft of spectroscopy as one of the important research techniques used by mid-nineteenth-century astronomers to the study of Mars. It details how the tools of spectroscopy led to the discovery of proof for the presence of water on the surface and in the atmosphere of Mars. It also discusses that the knowledge that water exists on Mars made astronomers believe they had proof that Mars had an Earth-like climate and that the red patches on Mars were vegetation. The chapter explains that spectroscopy involves channeling a beam of light from any source through a prism or a grating, which spreads the light out into its constituent colors, allowing scientists to study the details of brightness and faintness of the different colors. It mentions William Huggins and William Allen Miller, who suggested that the Mars's red color is a consequence of its inability to reflect violet and blue light.

scholarly journals In Vivo Sensitivity of Blue-Light-Dependent Signaling Mediated by AppA/PpsR or PrrB/PrrA in Rhodobacter sphaeroides

2009 ◽  
Vol 191 (13) ◽  
pp. 4473-4477 ◽  
Author(s):  
Sebastian Metz ◽  
Andreas Jäger ◽  
Gabriele Klug
Keyword(s):  
Blue Light ◽  
Rhodobacter Sphaeroides ◽  
Flavin Adenine Dinucleotide ◽  
The Other ◽  
Dependent Manner ◽  
Bluf Domain ◽  
The One

ABSTRACT Formation of photosynthesis complexes in Rhodobacter sphaeroides is regulated in a redox- and light-dependent manner by the AppA/PpsR and PrrB/PrrA systems. While on the one hand, blue light is sensed by the flavin adenine dinucleotide-binding BLUF domain of AppA, on the other, light is absorbed by bacteriochlorophyll signals through PrrB/PrrA. We show that much smaller quantities initiate the AppA-mediated response to blue light than the bacteriochlorophyll-mediated response.

scholarly journals Research Note: Visibility of temporal light artefact from flicker at 11 kHz

2019 ◽  
Vol 52 (3) ◽  
pp. 371-376 ◽  
Author(s):  
E Brown ◽  
T Foulsham ◽  
Chan-su Lee ◽  
A Wilkins
Keyword(s):  
Everyday Life ◽  
Eye Movement ◽  
Research Note ◽  
The Other ◽  
Saccadic Eye Movement ◽  
Visual Discomfort ◽  
Flickering Light

A flickering light can be seen during a saccadic eye movement as a pattern of contours known as a phantom array. On repeated pairs of trials, observers made saccades across a narrow (1 arc minutes), bright (10−4 cd/m2) source of flickering light and were required to detect the phantom array. On one of each pair of trials, chosen at random, the light flickered at 60 kHz and on the other at a frequency chosen in the range 1–11 kHz. In two such studies, a few observers were reliably able to discriminate 11 kHz from 60 kHz on the basis of the visibility of the phantom array. The average threshold at which the array was visible was about 6 kHz and therefore double that previously obtained with larger targets. Those observers who were able to see the phantom array tended reliably to report more symptoms of visual discomfort in everyday life.

Modulation of reproductive output in Drosophila by spectral properties of ambient light

1986 ◽  
Vol 64 (2) ◽  
pp. 537-542
Author(s):  
Bruce Buhr ◽  
Wayne Wiens ◽  
Marvin Dirks ◽  
Hugh Riordan
Keyword(s):  
Drosophila Melanogaster ◽  
Blue Light ◽  
Spectral Properties ◽  
Reproductive Output ◽  
The Other ◽  
Fluence Rate ◽  
Ambient Light ◽  
Wild Type ◽  
Reproductive Response ◽  
Genetically Determined

The net reproductive output was determined for two strains of Drosophila melanogaster, wild-type (+) and white-eyed (w), under conditions of varied wavelength and intensity of illumination. The reproductive output of wild-type flies raised under blue light (max. 470 nm) was significantly lower (p < 0.01) than that of organisms grown under red (max. 630 and 660 nm) or green(max. 530 nm) illumination, or under conditions of total darkness. In contrast, blue light did not depress the reproductive output of white-eyed flies. The differential reproductive response of the two strains, then, appears to be related to genetically determined properties of the eye. Changes in the radiant fluence rate over a 10-fold range were not found to significantly modify reproductive output of wild-type flies, and if flies were illuminated with red, green, or blue light at identical fluence rates, those under blue, again, had a significantly lower (p < 0.01) reproductive output than the other two. The data suggest that the emission spectrum, not the radiant light intensity, significantly affects the number of offspring produced per parent.

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