clock

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clock

(klŏk)
n.
1. An instrument other than a watch for measuring or indicating time, especially a mechanical or electronic device having a numbered dial and moving hands or a digital display.
2. A biological clock.
v. clocked, clocking, clocks
v.tr.
To register or record with a mechanical device: clocked the winds at 60 miles per hour.

clock′er n.

CLOCK

A gene on chromosome 4q12 that encodes a ubiquitously expressed human homolog of the mouse clock gene, which forms a heterodimer with ARNTL and activates E-box element transcription of several circadian clock proteins (e.g., PER1 and PER2). CLOCK is highly expressed in the suprachiasmatic nucleus.

Molecular pathology
CLOCK-ARNTL double mutations in the PAS domains result in syngernistic desensitisation to high levels of CRY on repression of CLOCK-ARNTL transcriptional activity of PER1, disrupting circadian rhythmicity.

clock

(klok)
A device for measuring time.

biological clock

1. An internal system in organisms that influences behavior in a rhythmic manner. Functions such as growth, feeding, secretion of hormones, the rate of drug action, the wake-sleep cycle, the menstrual cycle, and reproduction coincide with certain external events such as day and night, the tides, and the seasons. Biological clocks appear to be set by environmental conditions in some animals, but if these animals are isolated from their environment they continue to function according to the usual rhythm. A gradual change in environment does produce a gradual change in the timing of the biological clock. See: circadian; maladaptation to night work; zeitgeber
2. A colloquial term for the decrease in fertility that accompanies aging, particularly as women approach the age of 35.

Patient discussion about clock

Q. How do you wake up in the morning if your narcolepsy is so severe you can't hear the alarm clock, phone ring? biggest problem is sleep paralysis, can't wake up. Late for work, everything, life is suffering because of severity. Have tried ritalin, natural supplements, hypnosis therapy, Provigal, antidepressants, nothing seems to work. Employer thinks it's an excuse, friends are irritated, I'm at my wits end. Life is spent sleeping more than awake.

A. Narcolepsy cannot yet be cured. But EDS and cataplexy, the most disabling symptoms of the disorder, can be controlled in most patients with drug treatment. Often the treatment regimen is modified as symptoms change. For decades, doctors have used central nervous system stimulants-amphetamines such as methylphenidate, dextroamphetamine, methamphetamine, and pemoline-to alleviate EDS and reduce the incidence of sleep attacks. For most patients these medications are generally quite effective at reducing daytime drowsiness and improving levels of alertness. However, they are associated with a wide array of undesirable side effects so their use must be carefully monitored. Common side effects include irritability and nervousness, shakiness, disturbances in heart rhythm, stomach upset, nighttime sleep disruption, and anorexia. For full article: http://www.ninds.nih.gov/disorders/narcolepsy/detail_narcolepsy.htm#120393201 Hope this helps.

More discussions about clock
References in periodicals archive ?
Operating Function Typical Typical Usage Mode Current Run All Clocks Frequency Normal Operation Active Dependent Doze - Slower CPU 35-75% Applications Using High-Speed Clock Active Peripherals Requiring Little - Full-Speed Current processing Peripheral Clock Idle - No CPU Clock 25% Active App is Waiting for an External - Full-Speed Current Event From Peripheral Peripheral Clock Sleep - No CPU or 50-100 nA Main Low-Power Mode, Used in Peripheral most Applications Clocks - 32 kHz Crystal Enabled Deep - No CPU or < 50 nA App With Low Run: Sleep Time Sleep Peripheral Ratios or With Long Sleep Clock times.
Granted, it's not quite that bad, but the reason a lot of these benchmarks use vastly older tests is almost certainly because they respond to CPU clock gains particularly well.
Specifications Electrical PPM-LX800 CPU Clock 500MHz actual, 800MHz eq.
TEHRAN (FNA)- According to Krzanich, there's an industry-wide conspiracy to slow CPU clock speeds and architectural advances to a crawl, while IBM, Intel, Qualcomm, ARM, Samsung, and a dozen other companies all rake in enormous profits.
There are constraints on the CPU clock speed related to the baud rate.
The 31% increase in CPU clock speed will keep games from becoming CPU-limited, and it's possible that Sony addressed other issues in the SoC as well.
While Apple didn't give importance to major hardware and design updates, the company has slashed the prices of the 11.6-inch and 13.3-inch Macbook Air by $100 and increased the CPU clock speed by 100 MHz.
In this mode, the system clock and the peripherals continue to operate from the same source and at the same speed, while the CPU clock speed is reduced.
The Athlon X4 880K doesn't include an integrated GPU at all, but its 4GHz - 4.2GHz CPU clock and associate TDP don't change.
For instance, the mobile unit can adjust the CPU clock speed or the screen brightness to extend battery life and give the user more time to work on other things.