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Proceedings of the National Academy of... Apr 2013The time-dependent Schrödinger equation is a cornerstone of quantum physics and governs all phenomena of the microscopic world. However, despite its importance, its...
The time-dependent Schrödinger equation is a cornerstone of quantum physics and governs all phenomena of the microscopic world. However, despite its importance, its origin is still not widely appreciated and properly understood. We obtain the Schrödinger equation from a mathematical identity by a slight generalization of the formulation of classical statistical mechanics based on the Hamilton-Jacobi equation. This approach brings out most clearly the fact that the linearity of quantum mechanics is intimately connected to the strong coupling between the amplitude and phase of a quantum wave.
Topics: Mechanics; Models, Theoretical; Quantum Theory; Time Factors
PubMed: 23509260
DOI: 10.1073/pnas.1302475110 -
International Journal of Radiation... Apr 2018
Topics: Curriculum; Humans; Physics; Radiation Oncology; Radiobiology
PubMed: 29722663
DOI: 10.1016/j.ijrobp.2018.01.045 -
Scientific Reports Jun 2021Blood pools can spread on several types of substrates depending on the surrounding environment and conditions. Understanding the influence of these parameters on the...
Blood pools can spread on several types of substrates depending on the surrounding environment and conditions. Understanding the influence of these parameters on the spreading of blood pools can provide crime scene investigators with useful information. The focus of the present study is on phase separation, that is, when the serum spreads outside the main blood pool. For this purpose, blood pools with constant initial masses on wooden floors that were either varnished or not were created at ambient temperatures of [Formula: see text], [Formula: see text], and [Formula: see text] with a relative humidity varying from 20 to 90%. The range [Formula: see text] to [Formula: see text] covers almost all worldwide indoor cases. The same whole blood from the same donor was used for all experiments. As a result, an increase in relative humidity was found to result in an increase in the final pool area. In addition, at the three different experimental temperatures, the serum spread outside the main pool at relative humidity levels above 50%. This phase separation is more significant on varnished substrates, and does not lead to any changes in the drying morphology. This phenomenon is explained by the competition between coagulation and evaporation.
Topics: Humans; Humidity; Hydrodynamics; Physics; Temperature
PubMed: 34083599
DOI: 10.1038/s41598-021-90954-5 -
Biomedical Engineering Online Jan 2009
Topics: Biology; Diagnostic Imaging; Models, Biological; Physics; Validation Studies as Topic
PubMed: 19138401
DOI: 10.1186/1475-925X-8-1 -
Journal of Applied Clinical Medical... Dec 2022
Review
Topics: Humans; United States; Physics; Workforce; Health Physics
PubMed: 36705248
DOI: 10.1002/acm2.13762 -
Genome Biology 2005Our bright young biologists should start thinking now about the ethical issues of what we can do and will be able to do in the future.
Our bright young biologists should start thinking now about the ethical issues of what we can do and will be able to do in the future.
Topics: History, 20th Century; Nuclear Warfare; Physics; World War II
PubMed: 16168089
DOI: 10.1186/gb-2005-6-9-118 -
Philosophical Transactions. Series A,... Mar 2014The past decades have seen density functional theory (DFT) evolve from a rising star in computational quantum chemistry to one of its major players. This Theme Issue,...
The past decades have seen density functional theory (DFT) evolve from a rising star in computational quantum chemistry to one of its major players. This Theme Issue, which comes half a century after the publication of the Hohenberg-Kohn theorems that laid the foundations of modern DFT, reviews progress and challenges in present-day DFT research. Rather than trying to be comprehensive, this Theme Issue attempts to give a flavour of selected aspects of DFT.
Topics: Biophysics; Computational Biology; Electron Spin Resonance Spectroscopy; Electrons; Magnetic Resonance Spectroscopy; Models, Theoretical; Molecular Dynamics Simulation; Photochemistry; Photosynthesis; Physics; Quantum Theory; Water
PubMed: 24516181
DOI: 10.1098/rsta.2012.0488 -
Igaku Butsuri : Nihon Igaku Butsuri... 2022
Topics: Physics; Medicine
PubMed: 36575028
DOI: 10.11323/jjmp.42.4_201 -
The British Journal of Radiology Dec 2011The use of cyclotrons and synchrotrons to accelerate charged particles in hospital settings for the purpose of cancer therapy is increasing. Consequently, there is a... (Review)
Review
The use of cyclotrons and synchrotrons to accelerate charged particles in hospital settings for the purpose of cancer therapy is increasing. Consequently, there is a growing demand from medical physicists, radiographers, physicians and oncologists for articles that explain the basic physical concepts of these technologies. There are unique advantages and disadvantages to all methods of acceleration. Several promising alternative methods of accelerating particles also have to be considered since they will become increasingly available with time; however, there are still many technical problems with these that require solving. This article serves as an introduction to this complex area of physics, and will be of benefit to those engaged in cancer therapy, or who intend to acquire such technologies in the future.
Topics: Elementary Particles; Equipment Design; Health Physics; Humans; Neoplasms; Particle Accelerators; Radiotherapy
PubMed: 22374548
DOI: 10.1259/bjr/16022594 -
International Journal of Molecular... Dec 2023Over the last ten years, the discovery of topological materials has opened up new areas in condensed matter physics. These materials are noted for their distinctive... (Review)
Review
Over the last ten years, the discovery of topological materials has opened up new areas in condensed matter physics. These materials are noted for their distinctive electronic properties, unlike conventional insulators and metals. This discovery has not only spurred new research areas but also offered innovative approaches to electronic device design. A key aspect of these materials is now that transforming them into nanostructures enhances the presence of surface or edge states, which are the key components for their unique electronic properties. In this review, we focus on recent synthesis methods, including vapor-liquid-solid (VLS) growth, chemical vapor deposition (CVD), and chemical conversion techniques. Moreover, the scaling down of topological nanomaterials has revealed new electronic and magnetic properties due to quantum confinement. This review covers their synthesis methods and the outcomes of topological nanomaterials and applications, including quantum computing, spintronics, and interconnects. Finally, we address the materials and synthesis challenges that need to be resolved prior to the practical application of topological nanomaterials in advanced electronic devices.
Topics: Computing Methodologies; Quantum Theory; Electronics; Gases; Nanostructures
PubMed: 38203574
DOI: 10.3390/ijms25010400