Results 271 to 280 of about 256,970 (318)
The quantum physics of observers [PDF]
Journal of Optics B: Quantum and Semiclassical Optics, 2002 The observer is herein studied as an aspect of laboratory physics. It is generally accepted that our status as observers is mediated by our material aspects: our body and brain. But, observers are typically equated with classical coordinate systems. An alternative, modelling the observer as a quantum entity, is considered.
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Nature, 2006
Quantum mechanics states that the measurement process can fundamentally alter what is being measured. This 'back-action' has been observed on the macroscopic scale — in the vibrations of a tiny mechanical device.
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Quantum mechanics states that the measurement process can fundamentally alter what is being measured. This 'back-action' has been observed on the macroscopic scale — in the vibrations of a tiny mechanical device.
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The observation of art and the art of observing individuals with physical differences
American Journal of Medical Genetics Part C: Seminars in Medical Genetics, 2021AbstractAstute observation is a fundamental skill in medical care because not only it is crucial for the detection of patients' emotions (which is a prerequisite for empathy) but also it can often yield diagnoses at first sight. The Germans call this technique “augenblickdiagnose,” and indeed, gestalt diagnosis together with systematic review is used ...
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Nature of the Physical Observer
AIP Conference Proceedings, 2010The nature of the observer has long plagued physical science. Here we review the current status of cognitive science in the context of a cosmology of mind in an Anthropic Multiverse. The concept of an elan vital or life force has long been considered the elementary action principle driving the evolution of living‐systems by theologically minded ...
Drahcir S. Osoroma +3 more
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Can the effect of distant matter on physical observables be observed? [PDF]
Il Nuovo Cimento B Series 11, 1975 The effects of distant matter on physical observables are discussed under the assumption that the distribution of distant matter is isotropic. We investigate the behaviours of light rays and radar signals near a massive star, the motion of a two-body system and the gravitational red-shifts of light rays emitted from a massive star, which is surrounded ...
Toshiei Kimura, T. Ohta, K. Hiida
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Observing physical activity in suburbs
Health & Place, 2008This study examined the reliability of the block walk method (BWM) for observing physical activity on suburban sidewalks/streets. Trained observers simultaneously walked 40 sidewalk/street segments each 1525 m in length at a pace of 30.5 m/min while recording the number of individuals walking/bicycling/jogging and the address where the activity ...
Richard R. Suminski +3 more
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Observational particle physics
Nuclear Physics A, 1988Abstract A review is given of the detection of neutrinos from the supernova SN1987a and of neutrinos from the sun. Searches for monopoles, dark matter candidates and supersymmetric particles are described, and an outlook on future experiments given.
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From Observations to Physical Parameters
2012Observational measures of AGNs allow us to directly infer some basic physical properties of quasars including (1) physical conditions and chemical abundances in the broad-line emitting gas as well as (2) radius of the line-emitting region, (3) black hole mass, (4) and Eddington ratio.
D'ONOFRIO, MAURO +12 more
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Physical Observables as Operators
2019The correspondence of physical observables to operators is established. The fundamental Commutation Relations are discussed. The Expectation Values of physical observables and the concept of Uncertainty are analyzed. The Heisenberg inequality for position and momentum is derived. Hermitian Conjugation and Hermitian operators are introduced.
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