Zobrazeno 1 - 10
of 20
pro vyhledávání: '"J. C. Levin"'
Publikováno v:
Geoscientific Model Development, Vol 13, Pp 3709-3729 (2020)
We describe “Doppio”, a ROMS-based (Regional Ocean Modeling System) model of the Mid-Atlantic Bight and Gulf of Maine regions of the northwestern North Atlantic developed in anticipation of future applications to biogeochemical cycling, ecosystem
Externí odkaz:
https://doaj.org/article/e2c705190006429c91385e9bf46fffb8
Publikováno v:
Journal of Neonatal-Perinatal Medicine. 14:519-526
BACKGROUND: The optimal oxygen saturation target in preterm infants is not known. In this study, we aimed to assess the effect of lower oxygen saturation targets on the rate of bronchopulmonary dysplasia (BPD), retinopathy of prematurity (ROP), and p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cfbadfdf09251022a03cfe9d5b94103b
https://doi.org/10.3233/npm-200637
https://doi.org/10.3233/npm-200637
Publikováno v:
Journal of Geophysical Research: Oceans. 127
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dedb2c401124c357205e1a7f3bfa3039
https://doi.org/10.1029/2021jc018281
https://doi.org/10.1029/2021jc018281
Publikováno v:
Physical Review Letters. 76:1220-1223
We report new measurements of He{sup ++}/He{sup +} ratios in three energy ranges. Near threshold, where only photoionization contributes, we find a ratio systematically lower than previously published measurements. From 2 to 6 keV, where Compton ioni
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::247259c8dec85eb39534e51031cfc408
https://doi.org/10.1103/physrevlett.76.1220
https://doi.org/10.1103/physrevlett.76.1220
Autor:
Richard D. Deslattes, Albert Henins, Stephen H. Southworth, Yoshiro Azuma, P. L. Cowan, B. A. Karlin, M A MacDonald, Thomas W. LeBrun, J. C. Levin
Publikováno v:
Physical Review A. 51:3598-3603
Near an absorption edge, x-ray emission cannot be treated separately from the absorption process itself; a scattering formalism must be used. Experimental data have been recorded showing x-ray emission from xenon following excitation by tunable synch
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::369c5ff074d023eac386853bf747d767
https://doi.org/10.1103/physreva.51.3598
https://doi.org/10.1103/physreva.51.3598
Publikováno v:
Physical Review A. 49:228-235
Measurements are reported of mean energies of argon recoil ions produced by beams of 23-MeV ${\mathrm{Cl}}^{5+,8+,10+}$ or 19-MeV ${\mathrm{F}}^{9+}$, and of neon recoil ions produced by beams of 22-MeV ${\mathrm{Cl}}^{4+}$, detected in coincidence w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bc6c6044ca3dd963337c39ca9396550d
https://doi.org/10.1103/physreva.49.228
https://doi.org/10.1103/physreva.49.228
Autor:
I. A. Sellin, B. M. Johnson, J. C. Levin, R.T. Short, Keith W. Jones, S.D. Kravis, H. G. Berry, M. Meron, M. Druetta, David A. Church, N.B. Mansour, Y. Azuma
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. :417-421
Studies of electron transfer collisions of low energy stored ions with target atoms have been carried out as a function of the well depth of the Penning ion trap. The ions were produced by vacancy cascades following inner-shell photoionization by syn
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64cf3d45dcf1db8f6998af47dbd01058
https://doi.org/10.1016/0168-583x(91)96061-o
https://doi.org/10.1016/0168-583x(91)96061-o
Autor:
Uwe Becker, Nora Berrah, Ivan A. Sellin, Ahmad H. Farhat, J. C. Levin, Georg Prümper, Ralf Wehlitz, R. Hentges, T. Buslaps
Publikováno v:
Physical Review A
We have measured the Compton double-to-single ionization ratio of helium using an ion time-of-flight spectrometer along with monochromatized synchrotron radiation of 57 keV. This photon energy is high and probes the Compton ionization alone, since th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f5515f7d7d4eca02348f8f49d5196b1
https://doi.org/10.1103/physreva.53.r3720
https://doi.org/10.1103/physreva.53.r3720
Publikováno v:
Molecular microbiology. 42(1)
Adaptive responses of bacteria that involve sensing the presence of other bacteria are often critical for proliferation and the expression of virulence characteristics. The autoinducer II (AI-2) pathway has recently been shown to be a mechanism for s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::af4ef0c350804fc8d53bce4884e9a8e0
https://pubmed.ncbi.nlm.nih.gov/11679074
https://pubmed.ncbi.nlm.nih.gov/11679074
Autor:
H. T. Schmidt, M. O. Larsson, J. C. Levin, B. Huber, Preben Hvelplund, S. H. Schwartz, K. Haghighat, A. Fardi, H. Cederquist, A. Langereis, Henning Lebius, I. A. Sellin
Publikováno v:
AIP Conference Proceedings.
In this progress report we discuss the electronic response of the C60 molecule and its positive ions by means of comparisons between experimental results and two different models for the charge mobility in C60. We have measured projectile angular dif
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe172c0c8bc0a0345fd47c998edd9ea0
https://doi.org/10.1063/1.1302691
https://doi.org/10.1063/1.1302691