News tagged with time
The negative effects of poorly controlled asthma symptoms on sleep quality and academic performance in urban schoolchildren has been confirmed in a new study.
Inflammatory disorders 12 hours ago | not rated yet | 0
(AP)—Former Navy Secretary Richard J. Danzig, who has served as a bio-warfare adviser to the president, the Pentagon, and the Department of Homeland Security, urged the government to stockpile an anti-anthrax drug while ...
Medications May 20, 2013 | 5 / 5 (1) | 0
Movie star Angelina Jolie tested positive for a "faulty gene" at the center of a high-profile legal battle in the United States that challenges whether human genes can belong to a corporation.
Cancer May 16, 2013 | not rated yet | 1
(HealthDay)—While hospital rapid response teams are effective in managing patients at risk or in crisis, team members need teamwork and good communication, according to a study published in the May issue ...
Other May 11, 2013 | not rated yet | 0
Researchers discovered that small pieces of genetic material called microRNAs link the two defining characteristics of fit muscles: the ability to burn sugar and fat and the ability to switch between slow- ...
Medical research May 08, 2013 | 5 / 5 (2) | 0 |
Black women with breast cancer were found to be three times more likely than their white counterparts to delay treatment for more than 90 days—a time delay associated with increased deaths from the disease, according to ...
Cancer May 07, 2013 | not rated yet | 0
(HealthDay)—Long waiting times and unclear test results are the top patient grievances when it comes to visiting the doctor, according to a report published in the June issue of Consumer Reports.
Health May 03, 2013 | not rated yet | 0
Ninety-eight percent of women undergoing breast augmentation surgery say the results met or exceeded their expectations, according to a prospective outcome study published in the May issue of Plastic and Reconstructive Su ...
Surgery May 01, 2013 | 2 / 5 (2) | 0
(AP)—Authorities are investigating a valley fever outbreak that sickened 28 workers at solar power plants under construction in Central California.
Diseases, Conditions, Syndromes May 01, 2013 | not rated yet | 0
(HealthDay)—With the number of home births rising, the American Academy of Pediatrics has issued a policy statement on the practice that includes a recommendation that there be a caregiver who's present ...
Pediatrics Apr 29, 2013 | not rated yet | 0
(Medical Xpress)—Don't put all your eggs in one basket. Most of us have heard this old adage applied to many of life's decisions, from planting crops, to dating, to buying stock. Spread your resources to ...
Psychology & Psychiatry Apr 26, 2013 | 4 / 5 (10) | 1 |
Eighty-four million people―nearly half of all working-age U.S. adults―went without health insurance for a time last year or had out-of-pocket costs that were so high relative to their income they were considered underinsured, ...
Health Apr 26, 2013 | not rated yet | 0
Feeling frisky? If so, chances are greater your estrogen level –– and, perhaps, fertility –– are hitting their monthly peak. If not, you're more likely experiencing a profusion of desire-deadening progesterone, and ...
Medical research Apr 25, 2013 | 5 / 5 (2) | 0
(Medical Xpress)—Robots are everywhere these days. They roam Mars, solve Rubik's cubes and vacuum our floors. Now, a robot named da Vinci is helping patients across the Penn State region get the major surgeries ...
Surgery Apr 25, 2013 | 5 / 5 (3) | 0 |
Most children who suffer from sports-related concussions recover within a few days. However, in a small number of children, symptoms can last for a month or more. Although there have been numerous theories as to what might ...
Pediatrics Apr 25, 2013 | not rated yet | 0
Time is a component of the measuring system used to sequence events, to compare the durations of events and the intervals between them, and to quantify the motions of objects. Time has been a major subject of religion, philosophy, and science, but defining it in a non-controversial manner applicable to all fields of study has consistently eluded the greatest scholars.
In physics as well as in other sciences, time is considered one of the few fundamental quantities. Time is used to define other quantities – such as velocity – and defining time in terms of such quantities would result in circularity of definition. An operational definition of time, wherein one says that observing a certain number of repetitions of one or another standard cyclical event (such as the passage of a free-swinging pendulum) constitutes one standard unit such as the second, is highly useful in the conduct of both advanced experiments and everyday affairs of life. The operational definition leaves aside the question whether there is something called time, apart from the counting activity just mentioned, that flows and that can be measured. Investigations of a single continuum called spacetime brings the nature of time into association with related questions into the nature of space, questions that have their roots in the works of early students of natural philosophy.
Among prominent philosophers, there are two distinct viewpoints on time. One view is that time is part of the fundamental structure of the universe, a dimension in which events occur in sequence. Time travel, in this view, becomes a possibility as other "times" persist like frames of a film strip, spread out across the time line. Sir Isaac Newton subscribed to this realist view, and hence it is sometimes referred to as Newtonian time. The opposing view is that time does not refer to any kind of "container" that events and objects "move through", nor to any entity that "flows", but that it is instead part of a fundamental intellectual structure (together with space and number) within which humans sequence and compare events. This second view, in the tradition of Gottfried Leibniz and Immanuel Kant, holds that time is neither an event nor a thing, and thus is not itself measurable nor can it be travelled.
Temporal measurement has occupied scientists and technologists, and was a prime motivation in navigation and astronomy. Periodic events and periodic motion have long served as standards for units of time. Examples include the apparent motion of the sun across the sky, the phases of the moon, the swing of a pendulum, and the beat of a heart. Currently, the international unit of time, the second, is defined in terms of radiation emitted by caesium atoms (see below). Time is also of significant social importance, having economic value ("time is money") as well as personal value, due to an awareness of the limited time in each day and in human life spans.
For more information about Time, read the full article at
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