Zobrazeno 1 - 10
of 117
pro vyhledávání: '"A. B. Kudryavtsev"'
Autor:
Jeffrey T. Osterhout, J. William Schopf, Anatoliy B. Kudryavtsev, Andrew D. Czaja, Kenneth H. Williford
Publikováno v:
Astrobiology. 22:1239-1254
The current strategy for detecting evidence of ancient life on Mars-a primary goal of NASA's ongoing Mars 2020 mission-is based largely on knowledge of Precambrian life and of its preservation in Earth's early rock record. The fossil record of primit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9b6d6cf98f57f90c4ad4d05f3fb739de
https://doi.org/10.1089/ast.2021.0135
https://doi.org/10.1089/ast.2021.0135
The book is intended to help under- and postgraduate students and young scientists in the correct application of NMR to the solution of physico-chemical problems concerning the study of equilibria in solution. The first part of the book (Chapters 1-3
Publikováno v:
Moscow University Mathematics Bulletin. 75:169-171
The paper is focused on decomposition of Boolean functions in the form $$f_{1}\circ\ldots\circ f_{m}$$ , where $$\circ$$ is a commutative associative operation and $$f_{1},\ldots,f_{m}$$ are Boolean functions with fewer arguments. For each commutativ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14e1f01f129efd9b9cbcb1a8795da8de
https://doi.org/10.3103/s0027132220040051
https://doi.org/10.3103/s0027132220040051
Autor:
V. B. Kudryavtsev, Dmitry N. Babin
Publikováno v:
Moscow University Mathematics Bulletin. 75:87-89
An infinitely generated functional system of automata with a superposition operation contains both pre-complete classes and classes not embeddable in any pre-complete one. The paper describes a continual set of classes expanding to a pre-complete one
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a811d4833ce034b6b4743e905b140b09
https://doi.org/10.3103/s0027132220020084
https://doi.org/10.3103/s0027132220020084
Autor:
Anatoliy B. Kudryavtsev, Kevin D. McKeegan, Jeffrey T. Osterhout, Ming-Chang Liu, Kenneth H. Williford, J. William Schopf
The surface ecosystem of the Precambrian Earth was dominated by marine, planktonic and benthic phototrophic microorganisms, most prominently stromatolite-forming cyanobacteria, anoxygenic photosynthetic bacteria, and associated microbes. Although cou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f09fe8039018b7456c0e20af3557da40
Autor:
Kevin D. McKeegan, Anatoliy B. Kudryavtsev, Jeffrey T. Osterhout, Space Sci, J. William Schopf
Publikováno v:
Geological Society of America Abstracts with Programs.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6012728b4b649b76622f2245a6d44d28
https://doi.org/10.1130/abs/2020am-359839
https://doi.org/10.1130/abs/2020am-359839
Autor:
Anatoliy B. Kudryavtsev, Michael J. Spicuzza, John W. Valley, J. William Schopf, Kouki Kitajima
Publikováno v:
Proceedings of the National Academy of Sciences of the United States of America, vol 115, iss 1
Analyses by secondary ion mass spectroscopy (SIMS) of 11 specimens of five taxa of prokaryotic filamentous kerogenous cellular microfossils permineralized in a petrographic thin section of the ∼3,465 Ma Apex chert of northwestern Western Australia,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd7d0d78cb93b197d4c420ff3758a001
https://doi.org/10.1073/pnas.1718063115
https://doi.org/10.1073/pnas.1718063115
Publikováno v:
Moscow University Mathematics Bulletin. 76:35-36
We consider weighted directed acyclic graphs to whose edges nonnegative integers as weights are assigned. The complexity of a linear ordering of vertices is examined for these graphs in the order of topological sorting. An accurate estimate for the S
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a9a38865477935c7a14245db15802059
https://doi.org/10.3103/s0027132221010071
https://doi.org/10.3103/s0027132221010071
Autor:
Jeffrey T. Osterhout, Kenichiro Sugitani, Kouki Kitajima, Kenneth H. Williford, J. William Schopf, John W. Valley, Anatoliy B. Kudryavtsev
Publikováno v:
Precambrian Research. 299:309-318
A microbial consortium preserved in shallow water carbonaceous chert of the Paleoarchean (∼3400 Ma) Strelley Pool Formation (Pilbara Craton, northwestern Western Australia) is composed of copiously abundant globular “cobweb-like” swirls of rand
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a956dd32dfac4d03ebc617f60f8e5dfd
https://doi.org/10.1016/j.precamres.2017.07.021
https://doi.org/10.1016/j.precamres.2017.07.021
Autor:
Irene Schaperdoth, William J. Schopf, Visnja Vucetić, Warren D. Sharp, David Shimabukuro, David M. Bice, Alessandro Montanari, Jennifer L. Macalady, A. J. Timothy Jull, Anatoliy B. Kudryavtsev
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a94f4b239490e8b7872a5028e06cb89d
https://doi.org/10.1130/2019.2542(28)
https://doi.org/10.1130/2019.2542(28)