Zobrazeno 1 - 4
of 4
pro vyhledávání: '"J. Paul Callan"'
We have studied the evolution of COVID-19 in 12 low- and middle-income countries in which reported cases have peaked and declined rapidly in the past 2-3 months. In most of these countries the declines happened while control measures were consistent
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e45da5fb6a57d49ea3755666c0c0a4a
https://doi.org/10.1101/2020.09.26.20201814
https://doi.org/10.1101/2020.09.26.20201814
Publikováno v:
American Journal of Physics. 72:835-838
We compared student learning from different modes of presenting classroom demonstrations to determine how much students learn from traditionally presented demonstrations, and whether learning can be enhanced by simply changing the mode of presentatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::775aa6143f71eda099cbc7282fe24dae
https://doi.org/10.1119/1.1707018
https://doi.org/10.1119/1.1707018
Publikováno v:
Chemical Physics. 251:167-179
We directly measure ultrafast changes in the dielectric function of GaAs over the spectral range from the near-IR to the near-UV caused by intense 70-fs laser excitation. The dielectric function reveals the nature of the ultrafast phase transformatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5297193eff240b5dd251d9eccecac4a0
https://doi.org/10.1016/s0301-0104(99)00301-8
https://doi.org/10.1016/s0301-0104(99)00301-8
Publikováno v:
Physical Review Letters. 80:185-188
We used a new broadband spectroscopic technique to measure the dielectric function of GaAs over the spectral range of 1.5--3.5 eV following intense 70-fs laser excitation. The results provide the most detailed information thus far on the electron and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6b25fd76e8ae30c8a6593c3c760c4f14
https://doi.org/10.1103/physrevlett.80.185
https://doi.org/10.1103/physrevlett.80.185