A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2014; you can also visit the original URL.
The file type is application/pdf.
Filters
Arguments and Evidence Against a Younger Dryas Impact Event
[chapter]
2013
Climates, Landscapes, and Civilizations
Preserved Fulltext
In addition, the a priori odds of the impact of a >4 km comet in the prescribed configuration on the Laurentide Ice Sheet during the specified time period are infinitesimal, about one in 10 15 . ...
We present arguments and evidence against the hypothesis that a large impact or airburst caused a significant abrupt climate change, extinction event, and termination of the Clovis culture at 12.9 ka. ...
Sandia is a multiprogram laboratory operated ...
doi:10.1029/2012gm001209
fatcat:cepewhxmgzfejadier7njf4xei
Workshop on the Analysis of Interplanetary Dust Particles
1993
Meteoritics
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
Backscattered electron image of a hydrated, chondritic interplanetary dust particle, measuring 17).1m across. ...
We have no SEM equipped with a fast EDS system (the basic instrument for curatorial work on IDPs). ...
A component of glassy silicate panicles has recently been iden tified among thechondritic lOPs [28] . The spectrum of a thin section of a glass-rich IDP [28] resembles the comet spectra. 3. ...
doi:10.1111/j.1945-5100.1993.tb00272.x
fatcat:iejdfyqbnjfrdj5jau6lotdpqe
Natural Iron Silicides: A Systematic Review
2022
Minerals
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2022; you can also visit the original URL.
The file type is application/pdf.
The other component may be a main sequence, subgiant, or red giant star [458] . ...
The heating of the material is extremely fast, i.e., 1000 K/s. The lightning channel must be about 1mm thick. ...
doi:10.3390/min12020188
fatcat:u2hh3ez5g5cn5nnpythhys2cxi
Concentration of Platinum Group Elements during the Early Earth Evolution: A Review*
2017
Natural Resources
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
It is supposed that meteoritic bombardment of Earth has played a significant role in formation of PGEs deposits. ...
Since comets are believed to be primitive bodies with a composition like that of carbonaceous chondrites [100] , it should be expected that concentrations of PGEs in comets are high. ...
., sulfur and chlorine), 2) mechanism which either transports these source components or removes non-ore components to allow residual concentration of metals, 3) trap (depositional mechanism for formation ...
doi:10.4236/nr.2017.83012
fatcat:zomjuxgsdrdbxd5tozm4irs4tq
A Review of Models and Algorithms for Surface-Underground Mining Options and Transitions Optimization: Some Lessons Learnt and the Way Forward
2021
Mining
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2021; you can also visit the original URL.
The file type is application/pdf.
This requires the development of a well-integrated strategy of mining options for surface and/or underground mining and their interactions. ...
In this study, extensive literature review and a gap analysis matrix are used to identify the limitations and opportunities for further research in surface-underground mining options and transitions optimization ...
The Fast Lagrangian Analysis of Continua (FLAC) software based on numerical modeling and a hybrid support vector regression (v-SVR) analysis based on supervised machine learning algorithm are used to examine ...
doi:10.3390/mining1010008
fatcat:2q6gl5kelnd6hdnvkb2owk4pk4
Comprehensive analysis of nanodiamond evidence relating to the Younger Dryas Impact Hypothesis
2016
Journal of Quaternary Science
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
for a ≈ 1,300 year interval known as the Younger Dryas stadial. ...
We find no evidence for lonsdaleite in YDB sediments and find no evidence of a spike in nanodiamond concentration at the YDB layer to support the impact hypothesis. ...
(d) Fast Fourier transform (FFT) of lonsdaleite ND crystal. ...
doi:10.1002/jqs.2892
fatcat:67hpjblsjvhvhklswsr4pvat4u
An Optimized Frame-Driven Routing Algorithm for Reconfigurable SRAM-based FPGAs
2020
IEEE Access
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
Run-time reconfiguration improves the reconfigurable computing paradigm allowing to rewrite just a portion of the FPGA configuration memory on-line. ...
Our method is based on a frame-driven routing algorithm able to drastically reduce the number of configuration memory frames used in the design. ...
The image has been obtained with COMET on a sample design programmed on the Kintex-7. ...
doi:10.1109/access.2020.2978632
fatcat:hr6wnw2lavdm7nclvswwa237d4
21. Commission de la Luminescence du Ciel
1960
Transactions of the International Astronomical Union
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2019; you can also visit the original URL.
The file type is application/pdf.
Determination directe au moyen des fusees La methode la plus directe et, par consequent, la plus sure pour determiner les altitudes d'emission consiste evidemment a placer des photometres a bord d'une ...
of 6300 A interferometer (Mularchic). (4) On the spectrograms the forbidden 0+ doublet at 3726-3729 A was resolved; the intensity ratio indicates excitation by fast particles (Galperin, Korotin). (5) ...
The apparent brightness of the zodiacal light is a very complex phenomenon depending on several components. ...
doi:10.1017/s0251107x00020885
fatcat:xvj5mbnxavdltpbyezunayp2wa
The Younger Dryas impact hypothesis: A requiem
2011
Earth-Science Reviews
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2016; you can also visit the original URL.
The file type is application/pdf.
small but common component of many terrestrial deposits. ...
l h o m e p a g e : w w w. e l s ev i e r. c o m / l o c a t e / e a rs c i rev physics. ...
a minute component of known lunar meteorites. ...
doi:10.1016/j.earscirev.2011.02.005
fatcat:2dirltpmdzdkfg5msguwjznsoe
Nanodiamond-Rich Layer across Three Continents Consistent with Major Cosmic Impact at 12,800 Cal BP
2014
The Journal of geology
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL.
The file type is application/pdf.
JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. ...
A B S T R A C T A major cosmic-impact event has been proposed at the onset of the Younger Dryas (YD) cooling episode at ≈12,800 ע 150 years before present, forming the YD Boundary (YDB) layer, distributed ...
A C K N O W L E D G M E N T S We thank Nick Schryvers, of the University of Antwerp, and several anonymous reviewers for detailed, helpful comments and corrections that led to significant improvements ...
doi:10.1086/677046
fatcat:xidc77bbpfhozmiov7gukkeu2i
Large meteorite impacts and planetary evolution
1995
Quaternary Science Reviews
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL.
The file type is application/pdf.
A fast saturation of mineral solution caused the formation of a great number of crystal embryos. ...
1994 and encounters with Comet Hyakutake in 1996 and Comet Hale-Bopp in 1997. ...
Prior to the Comet Shoemaker-Levy 9 impact with Jupiter, Zahnle and MacLow [1 ] attempted to predict the fireball luminosity history for a bolide impacting a thick H atmosphere. ...
doi:10.1016/0277-3791(95)90013-6
fatcat:aesdqzadlzfajdt5uxqgyssjaq
La reescritura del discurso místico y visionario en la obra de sor Francisca de Santa Teresa (1654-1709)
2014
Journal of Iberian Women Writers
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
Sus ocasionales muestras de realismo y humor barrocos otorgan a su obra un rasgo de originalidad. ...
Agradezco a su directora, Rebeca Sanmartín Bastida, la revisión y coordinación de este breve monográfico. La reescritura del discurso místico M. ...
Así, en uno de sus coloquios, el Discurso Humano, enemigo del Alma, pretende persuadir a esta de que afronte los innumerables trabajos de la vida religiosa sin cometer excesos. ...
doi:10.5944/rei.vol.2.2014.12001
fatcat:vcpul3m3mfg5zpkujk64ghbkkm
Ionizing Radiation and Life
2011
Astrobiology
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL.
The file type is application/pdf.
This review highlights the common thread that ionizing radiation forms between the disparate component disciplines of astrobiology. ...
Ionizing radiation is a ubiquitous feature of the Cosmos, from exogenous cosmic rays (CR) to the intrinsic mineral radioactivity of a habitable world, and its influences on the emergence and persistence ...
The air shower is composed of a central ''hard component'' core of nuclear fragments within a spreading ''soft component'' cone of the electromagnetic cascade (Amsler et al., 2008a) . ...
doi:10.1089/ast.2010.0528
pmid:21774684
fatcat:6s7rpfavqnb47boq4nxdcvsy3e
Logan Medallist 4. Large-Scale Impact and Earth History
2017
Geoscience Canada
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2019; you can also visit the original URL.
The file type is application/pdf.
Cela tient aux plus grandes sections transversales physiques et gravitationnelles de la Terre sur la trajectoire des astéroïdes et comètes qui pénètrent le système solaire interne. ...
It is a preservation sample of a much larger production population, with the impact rate on Earth being higher than that of the moon. ...
Osinski (Western U.) and A. Therriault and B. Robertson (GSC) for their stimulating intellectual interactions over the years. Thanks also go to M. ...
doi:10.12789/geocanj.2017.44.113
fatcat:fpdqibwkfnewrgmzwlpu3jb3ai
Chapter III: Twentieth General Assembly
1988
Transactions of the International Astronomical Union
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL.
The file type is application/pdf.
Fortunately, technical developments are fast reducing the geographic isolation of astronomers everywhere. ...
d'emetteurs spatiaux ou aeroportes, qui reduit l'avantage qu'il y a a placer les observatoires dans des sites isoies ; c. le niveau particulierement eieve des parasites nuisibles produits regulierement ...
doi:10.1017/s0251107x00016187
fatcat:fxovyyeijjaejah47e2rawqrwy
« Previous
Showing results 1 — 15 out of 190 results