European Physical Journal C -- Particles & Fields. Nov2020, Vol. 80 Issue 11, p1-8. 8p.
Subjects
UNCERTAINTY and PHYSICISTS
Abstract
Taking into account that the scalar a 0 (980) can be dynamically generated from the pseudoscalar-pseudoscalar interaction within the chiral unitary approach, we have studied the single Cabibbo suppressed process D + → π + π 0 η . We find clear peaks of a 0 (980) + and a 0 (980) 0 in the π + η and π 0 η invariant mass distributions, respectively. The predicted Dalitz plots of D + → π + π 0 η also manifest the significant signals for a 0 (980) + and a 0 (980) 0 states. The uncertainties of the results due to the free parameters are also discussed. Our study shows that the process D + → π + π 0 η can be used to explore the nature of the scalar a 0 (980) , thus we encourage the experimental physicists to measure this reaction with more precision. [ABSTRACT FROM AUTHOR]
PHYSICS, PHYSICISTS, MATHEMATICS, QUANTUM theory, and MATHEMATICAL ability
Abstract
The article focuses on success of physics and role in grounding sciences support naturalistic and mentions that physicists have come up against limits of knowledge. Topics discussed include how photon makes choice to pass through or reflect, mathematics of quantum theory which jumbles subjective and objective elements and replacement with mathematical abstraction.
Howard, Michelle E., Herman, Michael G., and Grams, Michael P.
PLoS ONE. 5/21/2020, p1-12. 12p.
Subjects
DOSIMETERS, PHYSICISTS, CLINICS, RADIATION, and METHODOLOGY
Abstract
Radiochromic film (RCF) has several advantageous characteristics which make it an attractive dosimeter for many clinical tasks in radiation oncology. However, knowledge of and strict adherence to complicated protocols in order to produce accurate measurements can prohibit RCF from being widely adopted in the clinic. The purpose of this study was to outline some simple and straightforward RCF fundamentals in order to help clinical medical physicists perform accurate RCF measurements. We describe a process and methodology successfully used in our practice with the hope that it saves time and effort for others when implementing RCF in their clinics. Two RCF analysis software programs which differ in cost and complexity, the commercially available FilmQA Pro package and the freely available ImageJ software, were used to show the accuracy, consistency and limitations of each. The process described resulted in a majority of the measurements across a wide dose range to be accurate within ± 2% of the intended dose using either FilmQA Pro or ImageJ. [ABSTRACT FROM AUTHOR]
PHYSICISTS, NEURONS, ELECTROMAGNETIC pulses, and SHOCK waves
Abstract
The article discusses the experiment initiated by physicist Thomas Heimburg to uncover the medical mystery about the communication of nerve cells with mechanical pulses. Topics mentioned include the views of Heimburg on the impact of physical shock wave on electric pulses, the complexities of nerve pulse and the acknowledgment of Heimburg on the functions served by proteins.
New Scientist. 1/19/2019, Vol. 241 Issue 3213, p38-40. 3p. 2 Color Photographs.
Subjects
PHYSICISTS, PHYSICS, QUANTUM theory, BIG bang theory, DARK matter, PHENOMENOLOGICAL theory (Physics), and PERIMETER Institute for Theoretical Physics (Waterloo, Ont.)
Abstract
The article provides an overview of the present state of theoretical physicists, focusing particularly on ideas presented by physicists of the Perimeter Institute in Waterloo, Canada. It considers such ideas as growth in the field in the last 30 to 40 years; experimental ways to prove theories such as dark matter, black holes, quantum gravity, and the big bang theory; and problems with researchers following trendy or popular ideas instead of addressing unique notions.
New Scientist. 3/3/2018, Vol. 237 Issue 3167, p30-33. 4p.
Subjects
PHYSICISTS, PHYSICS, HIGGS bosons, THEORISTS, and UNIVERSE
Abstract
The article discusses the beliefs of the physicist regarding the universe. Topics mention including the discovery of the Higgs which confirms the long-held theory regarding how the particles acquire mass, working definition of the theorists known as the technical naturalness and standard model of the particle physics.
History Today. Nov2017, Vol. 67 Issue 11, p36-47. 12p.
Subjects
WOMEN physicists, ACHIEVEMENT, PATRIOTISM, and SCIENTIFIC discoveries
Abstract
A biography of Marie Sklodowska Curie, a famous female physicist of Polish descent, is presented. It discusses the multiple versions of her that exist in the 20th century, her scientific achievements, her struggle to establish her scientific identity, her patriotism, and her discovery of the elements, polonium and radium, with the help of her husband and chemist Pierre Curie.
Journal of Chemical Physics; 8/28/2020, Vol. 153 Issue 8, p1-15, 15p, 12 Diagrams, 3 Graphs
Subjects
DENSITY matrices, MOLECULAR orbitals, NATURAL orbitals, QUANTUM mechanics, and PHYSICISTS
Abstract
Molecular orbital framework is of central importance in chemistry. Often used by chemists and physicists to gain insight into molecular properties, Hartree–Fock or Kohn–Sham orbitals are obtained from rather crude treatments and, strictly speaking, are not observables. Yet, quantum mechanics offers a route for connecting general many-electron wavefunctions with reduced quantities—density matrices and orbitals—which give rise to observable properties. Such mapping makes possible, in principle, reconstruction of these objects from sufficiently detailed experimental data. This Perspective discusses Dyson orbitals and various types of natural transition orbitals and illustrates their role in modeling and interpreting different types of spectroscopic measurements. [ABSTRACT FROM AUTHOR]
New Scientist. 2/8/2020, Vol. 245 Issue 3268, p42-43. 2p.
Subjects
PHYSICISTS, ENCYCLOPEDIAS & dictionaries, PEOPLE of color, and WOMEN in science
Abstract
The most widely used encyclopedia on the planet has huge gaps when it comes to influential women or people of colour in science. Physicist Jess Wade is trying to fill them, she tells Joshua Howgego [ABSTRACT FROM AUTHOR]
European Journal of Physics. Nov2020, Vol. 41 Issue 6, p1-15. 15p.
Subjects
GENDER expression, PHYSICISTS, SOCIAL isolation, HARASSMENT, SEXUAL harassment, and LGBTQ+ youth
Abstract
This article looks at the qualitative survey responses of LGBT physicists about their experiences of exclusionary behavior and harassment. Of the 324 respondents 71 reported such an experience and gave a qualitative response. Findings indicate that the majority of respondents experienced exclusionary behavior based on their gender expression or being a woman. The behavior came mostly in the forms of verbal comments and social exclusion, with fewer participants reporting physical touching or sexual harassment. These findings indicate the importance of intersectionality when considering experiences in physics and point to the need for more research on and support for LGBT-identified students and professional. As such, the results represent a relevant and important case study in the area. [ABSTRACT FROM AUTHOR]
Current Opinion in Cell Biology. Oct2020, Vol. 66, p34-42. 9p.
Subjects
SCIENTIFIC computing, PHYSICISTS, MICROSCOPY, BIOLOGISTS, and OPTICS
Abstract
At the time of this writing, searching Google Scholar for 'light-sheet microscopy' returns almost 8500 results; over three-quarters of which were published in the last 5 years alone. Searching for other advanced imaging methods in the last 5 years yields similar results: 'super-resolution microscopy' (>16 000), 'single-molecule imaging' (almost 10 000), SPIM (Single Plane Illumination Microscopy, 5000), and 'lattice light-sheet' (1300). The explosion of new imaging methods has also produced a dizzying menagerie of acronyms, with over 100 different species of 'light-sheet' alone, from SPIM to UM (Ultra microscopy) to SiMView (Simultaneous MultiView) to iSPIM (inclined SPIM, not to be confused with iSPIM, inverted SPIM). How then is the average biologist, without an advanced degree in physics, optics, or computer science supposed to make heads or tails of which method is best suited for their needs? Let us also not forget the plight of the optical physicist, who at best might need help with obtaining healthy samples and keeping them that way, or at worst may not realize the impact their newest technique could have for biologists. This review will not attempt to solve all these problems, but instead highlight some of the most recent, successful mergers between biology and advanced imaging technologies, as well as hopefully provide some guidance for anyone interested in journeying into the world of live-cell imaging. [ABSTRACT FROM AUTHOR]