Zobrazeno 1 - 10
of 47
pro vyhledávání: '"J. E. Pollard"'
Publikováno v:
Sedimentary Geology. 138:161-177
A 25-m thick transgressive systems tract in the Sant Llorenc del Munt, wave-influenced, fan-delta system (Eocene, SE Ebro Basin) has an internal framework consisting of a cluster of transgressive erosion surfaces, each of which has minor relief and w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f92c51da5c66cb444b999fce4268c8f7
https://doi.org/10.1016/s0037-0738(00)00148-2
https://doi.org/10.1016/s0037-0738(00)00148-2
Publikováno v:
Geological Magazine. 134:265-268
A different approach to the naming of trace fossils is advocated. The primary ichnotaxobase should be the form of the burrow actually occupied, and the secondary ichnotaxobase should be the morphology of the structure that reflects the manner in whic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::50b0e78c4c8acaf8c9336d7ef487eba7
https://doi.org/10.1017/s0016756897006717
https://doi.org/10.1017/s0016756897006717
Autor:
M. A. Martin, J. E. Pollard
Publikováno v:
Geological Society, London, Special Publications. 114:163-183
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7202dc55ee1c366ee186a5171cf7c32d
https://doi.org/10.1144/gsl.sp.1996.114.01.08
https://doi.org/10.1144/gsl.sp.1996.114.01.08
Publikováno v:
Journal of the Geological Society. 150:149-164
In an attempt to interpret Ophiomorpha ichnofabrics observed in core, three ichnofabrics are described from outcrops where O. nodosa is a conspicuous element. These ichnofabrics enable sandy shoreline sedimentary environments to be characterized and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c6f0a4614ed47d702eeb8553fb814a23
https://doi.org/10.1144/gsjgs.150.1.0149
https://doi.org/10.1144/gsjgs.150.1.0149
Autor:
J. E. Pollard
Publikováno v:
Review of Scientific Instruments. 63:1771-1776
Supersonic beams of atomic nitrogen and oxygen are produced by an electrodeless rf discharge within a ceramic nozzle. Mixtures of N2 or O2 seeded in He are heated by 100 W at 38 MHz with a stagnation pressure of 200–250 Torr. The flux of reactive a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bfd0b2138898d3abf49cb6458f546c85
https://doi.org/10.1063/1.1143811
https://doi.org/10.1063/1.1143811
Publikováno v:
The Journal of Chemical Physics. 95:4894-4904
The endoergic reaction He+H+2→HeH++H is investigated in a molecular‐beam experiment as a function of H+2 vibrational energy at c.m. collision energies between 0.3 and 1.9 eV. Reactant ions generated by resonantly enhanced four‐photon ionization
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::efd04f2f751ee94ea08a7f730c0f88a8
https://doi.org/10.1063/1.461705
https://doi.org/10.1063/1.461705
Publikováno v:
The Journal of Chemical Physics. 95:4877-4893
Cross sections for the reaction H+2+H2→H+3+H, differential in scattering angle and recoil energy, are measured in a molecular‐beam experiment at c.m. collision energies of 1.5, 2.3, 3.5, and 5.3 eV. Resonantly enhanced four‐photon ionization pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::acd0df9fba8227044f926a3270d86236
https://doi.org/10.1063/1.461704
https://doi.org/10.1063/1.461704
Radiated electric fields were measured from a BHT-200 Hall thruster from 10 kHz to 18 GHz following MIL-STD 461E (RE102) specifications. The thruster, operated by a laboratory power supply, was located in a fiberglass vacuum tank that was enclosed in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dad1a5592ce2fe61e01e2e69fbe02ba5
https://doi.org/10.21236/ada389493
https://doi.org/10.21236/ada389493
Autor:
J. E. Pollard
Low-thrust maneuvers are evaluated by calculating changes in the orbital elements with pre-defined steering programs. Four pitch steering cases are considered, where the in-plane acceleration vector is (1) perpendicular to the orbit radius vector, (2
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c08e7628bbd3491fb4031968b85cd37
https://doi.org/10.21236/ada384536
https://doi.org/10.21236/ada384536
Publikováno v:
The Journal of Chemical Physics. 94:8615-8617
We report on an experimental geometry for studying dynamical resonances in bimolecular collisions. The method is sensitive to atom–diatom reactions at low angular momentum and low impact parameter corresponding to the collinear coordinate. State‐
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6c5abb15144cd014b030c188626e83ee
https://doi.org/10.1063/1.460718
https://doi.org/10.1063/1.460718