Results 31 to 40 of about 3,334,012 (298)
Foods, 2023 In this study, a functionalized mesoporous silica-coated solid-phase microextraction (SPME) Arrow system was developed for the enrichment of six biogenic amines (BAs) from pork and fish samples before gas chromatographic separation with a mass ...
Mengfei Chen +3 more
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Astronomy and Geophysics, 1971 If we are unfortunate enough to drop a basket of eggs we may rightly feel dismayed. For even with the most painstaking human manipulation it is surely not possible to reassemble the broken pieces.
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The Quantum Mechanical Arrows of Time [PDF]
Fundamental Aspects Quantum Theory, ed by D. Struppa and J.
Tollaksen, (Springer, Milan, 2013), 2013 The familiar textbook quantum mechanics of laboratory measurements incorporates a quantum mechanical arrow of time --- the direction in time in which state vector reduction operates. This arrow is usually assumed to coincide with the direction of the thermodynamic arrow of the quasiclassical realm of everyday experience. But in the more general context
arxiv +1 more source
On the statistical arrow of time
, 2023 What is the physical origin for the arrow of time? It is a commonly held belief in the physics community that it relates to the increase of disorder, or entropy, as it appears in the statistical interpretation of the second law of thermodynamics.
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Solid-Phase Microextraction Arrow for the Sampling of Volatile Organic Compounds in Milk Samples
Separations, 2020 A novel sample preparation method based on the use of the Arrow solid-phase microextraction device was used to extract and preconcentrate volatile organic compounds (VOCs) from milk samples prior to their determination by gas chromatography–mass ...
Natalia Manousi +2 more
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The direction of time: from the global arrow to the local arrow [PDF]
Int.J.Theor.Phys.42:2487-2504,2003, 2003 In this paper we discuss the traditional approaches to the problem of the arrow of time. On the basis of this discussion we adopt a global and non-entropic approach, according to which the arrow of time has a global origin and is an intrinsic, geometrical feature of space-time.
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Fundamentality and Time’s Arrow [PDF]
Philosophy of Science, 2018 The distribution of matter in our universe is strikingly time asymmetric. Most famously, the Second Law of Thermodynamics says that entropy tends to increase toward the future but not toward the past. But what explains this time-asymmetric distribution of matter?
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Beyond the Arrow of Time: Can There Be a Relation between the Measurement of Entropy and Time?
Proceedings, 2017 The general tendency of the entropy of an isolated to increase is considered to be directly linked to the direction of the flow of time. This raises the question whether a quantitative relation can be established such that a time interval can be measured
Ben Akih-Kumgeh
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Changing the load of a arrow crane while carrying out loading and unloading works [PDF]
Naučno-Tehničeskij Vestnik Brânskogo Gosudarstvennogo Universiteta, 2020 The stability of self-propelled jib cranes is a key task in the process of their operation. The developed calculation scheme of the arrow self-propelled crane and the restrictions imposed on its movement in time and space, allowed to obtain mathematical ...
Sladkova L.A, Krylov V.V, Gorelova M.V.
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Arrows of Time and Chaotic Properties of the Cosmic Background Radiation [PDF]
J.Phys.A35:7243-7254,2002, 2002 We advance a new viewpoint on the connection between the the thermodynamical and cosmological arrows of time, which can be traced via the properties of Cosmic Microwave Background (CMB) radiation. We show that in the Friedmann-Robertson-Walker Universe with negative curvature there is a necessary ingredient for the existence of the thermodynamical ...
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