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· Arousal · Exercise · Posture
· Sleep
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The Cause of Internet and TV Addiction? |
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Color Temperature
· Non-visual Effects of the Color Temperature of Fluorescent Lamps on Physiological Aspects in Humans. · Effect of illuminance and color temperature on lowering of physiological activity.
“Photographers and
cinematographers think about color temperature every time they create an
image. Behind the action in a photo or film, color temperature helps to set
the look and mood of what we watch. Flat TV People .com: Technology: Color Temperature
“Color temperature is measured in degrees Kelvin (k). · Higher color temperatures correspond to cooler, blue light and · Lower temperatures correspond to warmer, yellow light. · The color temperature of mid-daylight is around 5500° k.
” Flat TV People .com: Technology: Color Temperature
TVs “Straight out of the box, many televisions may not look exactly as you wish. They often ship from the factory with a very high color temperature to emphasize the brightness of the set. However, end users are able to adjust color temperature to create the image that is most pleasing to them. Many televisions come with factory presets or recommended settings for various types of viewing. Common presets include warm or cool which are a reference to the color temperature. · Cool settings are brighter (like what you see in midday light) and · warm settings are softer (like what you see in a softly lit indoor environment).” Flat TV People .com: Technology: Color Temperature
Note: The color temperature feature of most monitors (TVs also) seems to be pretty limited. The lowest color temperature that can be set by most monitors/TVs is 6500° k. You might want to try adjusting the color temperature of your monitor with the PowerStrip program instead. Some computer monitors also have features for changing the color temperature. If your monitor doesn’t have this feature, there are also computer programs that can be used to change the color temperature, such as PowerStrip.
PowerStrip: Warning:Do not overdrive your monitor. You could permanently damage it. (For the most part, overclocking a component (e.g. with PowerStrip’s clock controls on the ‘Performance Profiles’ menu) beyond the manufacturer's specifications voids all warranties. Also, overclocking a piece of hardware increases the chance that it will fail prematurely or be permanently damaged.) · G4: Feature: Free File: PowerStrip · CNET > Downloads > Windows > Utilities > Optimizers & Diagnostics > PowerStrip (older version 3.56—may be more stable, has reviews)
Instructions… To start the PowerStrip program: · Double-click the Powerstrip icon (on your desktop or your start menu) To view the PowerStrip menu: · Single-click the icon on your system tray for PowerStrip (lower right hand corner of the screen, on your taskbar) To lower the color temperature: · In the PowerStrip menu, move the mouse over the ‘Color Profiles’ option. A second menu will appear. · Click ‘Configure’ on the second menu. · Click the indicator on the ‘Temperature’ slider while holding the mouse button down. Drag the slider to the right. · Save the color profile. · In the ‘Profiles’ section, click the ‘Save As’
button. · Click the ‘OK’ button to save the profile. · Click the ‘OK’ button to close the ‘Color Profiles’ menu. To use PowerStrip with DOS/console applications (e.g. games): · In the PowerStrip menu, move your mouse over the ‘Application Profiles’ option. A second menu will appear. · Click ‘Configure’ on the second menu. · In the ‘Application or Shortcut’ section, click the button that looks like a folder. · Find the name of the program you would like to use with PowerStrip. · Click the ‘Open’ button · In the section ‘Display, color and performance preferences’, choose the color profile you created earlier (in the second box). · In the ‘Profiles’ section, click the ‘Save As’ button. · Click the ‘OK’ button. · Click the ‘Close’ button to close the ‘Application profiles’ menu. Additional
Information about PowerStrip… Non-visual Effects of the Color Temperature of Fluorescent Lamps on Physiological Aspects in Humans. “The non-visual effects of the color temperature of fluorescent lamps were reviewed based mainly on our recent studies with special reference to physiological aspects in humans such as · Arousal level, · Autonomic nerve system including · Heart rate variability, · Blood pressure and · Body temperature regulation, · And sleep architecture.”
“It was concluded that · There obviously existed the non-visual effects of the spectral composition of fluorescent lamps on physiological aspects, · As predicted based on the functions of the nuclei located on the photic non-visual pathway.”
Purpose: “A variety of types of artificial illumination has recently become available, differing in the · Quality of illumination and · Range of color temperature.”
Previous Studies: “In our previous studies we found that in subjects with normal color vision · The nocturnal fall in core temperature and · The increase of urinary melatonin excretion were suppressed by · Bright blue or green light, but · Not by bright red or dim lights.”
Present Study: Goals: “The aim of our present study was to examine from the view point of chronobiology whether the lights of different color temperature often used in everyday life may affect core temperature and urinary melatonin secretion differently.”
Present Study: Methods: · “Experiments were carried out on five subjects with normal color vision. · They were exposed for 5 hr (from 21:00 h to 2:00 h) to two kinds of bright (1000 lx) light of different color temperature (6500 K, 3000 K) with · Dim (50 lx) light as a control; · After exposure they slept in darkness.”
Present Study: Results: “Our main results were as follows: The light with a high color temperature of 6500 K more strongly suppressed the nocturnal fall of the core temperature and the nocturnal increase of melatonin secretion than the light with a low color temperature of 3000 K. This difference was particularly evident for core temperature during the sleep period following experimental illumination.”
Effect of illuminance and color temperature on lowering of physiological activity. Purpose: “To investigate how illuminance and color temperature in illumination affect the autonomic nervous system and central nervous system in conditions tending to lower physiological activity…” Appl Human Sci.: Effect of illuminance and color temperature on lowering of physiological activity.
Methods: “…With an ordinary residential setting in mind, we performed an experiment on 8 healthy male subjects. The experimental conditions consisted of 4 conditions provided by a combination of · 2 levels of color temperature (3000 K, 5000 K) and · 2 levels of illuminance (30 lx, 150 lx).” Appl Human Sci.: Effect of illuminance and color temperature on lowering of physiological activity.
Measurement: · “Physiological measurement was carried out during a process of 22 minutes of light exposure followed by 20 minutes of sleep in darkness. · Heart rate variability (HRV) was used as an index of the autonomic nervous system, and · Alpha attenuation coefficient (AAC) [ratio of mean eyes-closed to mean eyes-open alpha power; the AAC is commonly used to measure alertness] and mean frequency of EEG were used as indices of the central nervous system. · Subjective evaluation of drowsiness during the experiment was also carried out immediately following the 20 minutes sleep.” Appl Human Sci.: Effect of illuminance and color temperature on lowering of physiological activity.
Results: “No effect on HRV [heart rate variability] from illumination was noted, …” Appl Human Sci.: Effect of illuminance and color temperature on lowering of physiological activity.
“Significantly (p < 0.05) lower values for AAC were obtained under 3000 K conditions than 5000 K conditions in measurements during the first half of light exposure (Session 1).” Appl Human Sci.: Effect of illuminance and color temperature on lowering of physiological activity.
“During alpha attenuation testing, significantly (p < 0.05) lower values for mean frequency in the theta-beta EEG bandwidth [higher values of beta/theta ratio are associated with attention problems and hyperactivity;Brainwaves: Theta/Beta Ratio] were also obtained under 3000 K conditions than 5000 K conditions, but that pattern persisted in measurement during the second half of light exposure (Session 2).” Appl Human Sci.: Effect of illuminance and color temperature on lowering of physiological activity.
“Subjective drowsiness was also higher under 3000 K conditions than 5000 K conditions. These results suggest that low color temperature light creates a smooth lowering of central nervous system activity, and that low color temperature illumination can be used effectively in a bedroom or other such environment where it is desirable to facilitate lowered physiological activity.” Appl Human Sci.: Effect of illuminance and color temperature on lowering of physiological activity.
Perception of Color · Arousal: Perception of Color
· Research Topics: Brainwaves: Alpha Waves: Low Alpha Waves: Causes Radiant Light · Research Topics: Brainwaves: Theta Brainwaves: Theta/Beta Ratio · The Brain: Serotonin: Serotonin and Melatonin · My Theories: Internet Addiction is Caused by Hypovolemia (Low Blood Volume) (blood pressure)
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