"The atmosphere is among the factors that determines the Earth's atmosphere." --ZenMode
"Donald has failed in almost every endeavor he has attempted. " --floridafan
"Abortion is not a moral issue. " --BidenPresident
"Propaganda can also be factual." --Flash
"Even after being vaccinated, you shed virus particles." --Jerome
"no slavery is forcing another into labor" -archives
"Evs are much safer from fires" -- Nordberg
"Abortion has killed no one." -- LurchAddams
"The atmosphere is among the factors that determines the Earth's atmosphere." --ZenMode
"Donald has failed in almost every endeavor he has attempted. " --floridafan
"Abortion is not a moral issue. " --BidenPresident
"Propaganda can also be factual." --Flash
"Even after being vaccinated, you shed virus particles." --Jerome
"no slavery is forcing another into labor" -archives
"Evs are much safer from fires" -- Nordberg
"Abortion has killed no one." -- LurchAddams
Last edited by anonymoose; 03-20-2023 at 08:50 PM.
Cypress (03-20-2023)
Chemistry instructors and educators discuss why chemistry teachers are lagging in their ability to teach quantum concepts -->
Modernizing General Chemistry for the Year 2050: Why Are General Chemistry Instructors Hesitant to Teach Quantum Concepts?
Peter Garik
Boston University
Judith Kelley
University of Massachusetts
Alan Crosby
Boston University
This is a study of the attitudes towards instruction of quantum theory by instructors of general chemistry. Quantum concepts are difficult for instructors to teach and for students to learn.
Based on exchanges at national meetings it is our perception that many chemistry instructors do not believe that quantum theory should be taught in general chemistry.
In presentations of our development work at meetings of the American Chemical Society, members of our team have found themselves the focus of strident attacks by chemistry instructors who vehemently denounced the teaching of quantum concepts in chemistry.
Further, in private conversations with both college and high school chemistry instructors, we have found that many admit that their own command of quantum mechanics was not what they wished it was.
The Sage of Main Street (03-21-2023)
Love me some astrophysics!
I registered on this board in 2006, and in all those years I have probably mentioned what degrees I earned one or two times. And taking the board as whole, you would be hard pressed to ever find me blabbing about my careers.
The only thing that matters is the way someone writes, the depths of their insights, and the scope of their interests. (Unless one is just frantically googling for tidbits of information, and sprinting back here to pass it off as their own original thoughts)
Doc Dutch (03-20-2023)
We should have a contest to see who can Google the most heavy science facts!....without citing the source or original author, of course. LOL
Example:
In this thesis, we explore examples of each of the three primary strategies for the detection of particle dark matter: indirect detection, direct detection, and collider production.
We first examine the indirect detection of weakly interacting massive particle (WIMP) dark matter via the gamma-ray photons produced by astrophysical WIMP annihilation. Such photons may be observed by the Fermi Gamma-ray Space Telescope. We propose the gamma-ray-flux probability distribution function (PDF) as a probe of the Galactic halo substructure predicted to exist by N-body simulations. The PDF is calculated for a phenomenological model of halo substructure; it is shown that the PDF may allow a statistical detection of substructure.
Next, we consider the direct detection of WIMPs. We explore the ability of directional nuclear-recoil detectors to constrain the local velocity distribution of WIMP dark matter by performing Bayesian parameter estimation on simulated recoil-event data sets. We discuss in detail how directional information, when combined with measurements of the recoil-energy spectrum, helps break degeneracies in the velocity-distribution parameters. Considering the possibility that velocity structures such as cold tidal streams or a dark disk may also be present in addition to the Galactic halo, we discuss the potential of upcoming experiments to probe such structures.
We then study the collider production of light gravitino dark matter. Light gravitino production results in spectacular signals, including di-photons, delayed photons, kinked charged tracks, and heavy metastable charged particles. We find that observable numbers of light-gravitino events may be found in future collider data sets. Remarkably, this data is also well suited to distinguish between scenarios with light gravitino dark matter, with striking implications for early-Universe cosmology.
Finally, we investigate the related matter of radiative corrections to the decay rate of charged fermions caused by the presence of a thermal bath of photons. The cancellation of finite-temperature infrared divergences in the decay rate is described in detail. Temperature-dependent radiative corrections to the two-body decay of a hypothetical charged fermion and to electroweak decays of a muon are given. We touch upon possible implications of these results for charged particles in the early Universe.
"Hatred is a failure of imagination" - Graham Greene, "The Power and the Glory"
Cypress (03-20-2023)
Cypress (03-20-2023)
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