Author
Anders Eriksson
Other affiliations: Chalmers University of Technology, Chinese Academy of Sciences, University of Cambridge ...read more
Bio: Anders Eriksson is an academic researcher from Swedish Institute of Space Physics. The author has contributed to research in topics: Comet & Population. The author has an hindex of 68, co-authored 679 publications receiving 19487 citations. Previous affiliations of Anders Eriksson include Chalmers University of Technology & Chinese Academy of Sciences.
Topics: Comet, Population, Solar wind, Ionosphere, Magnetosphere
Papers published on a yearly basis
Papers
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University of Copenhagen1, University of California, Berkeley2, Technical University of Denmark3, Estonian Biocentre4, Imperial College London5, University of Cambridge6, Chinese Academy of Sciences7, Stanford University8, Murdoch University9, National Autonomous University of Mexico10, University of Western Australia11, Kitasato University12, University of Bern13, University of Chicago14, University of Toulouse15, Leiden University16, University College London17, Griffith University18, Max Planck Society19, University of British Columbia20, Estonian Academy of Sciences21
TL;DR: It is shown that Aboriginal Australians are descendants of an early human dispersal into eastern Asia, possibly 62,000 to 75,000 years ago, which is separate from the one that gave rise to modern Asians 25, thousands of years ago.
Abstract: We present an Aboriginal Australian genomic sequence obtained from a 100-year-old lock of hair donated by an Aboriginal man from southern Western Australia in the early 20th century. We detect no evidence of European admixture and estimate contamination levels to be below 0.5%. We show that Aboriginal Australians are descendants of an early human dispersal into eastern Asia, possibly 62,000 to 75,000 years ago. This dispersal is separate from the one that gave rise to modern Asians 25,000 to 38,000 years ago. We also find evidence of gene flow between populations of the two dispersal waves prior to the divergence of Native Americans from modern Asian ancestors. Our findings support the hypothesis that present-day Aboriginal Australians descend from the earliest humans to occupy Australia, likely representing one of the oldest continuous populations outside Africa.
656 citations
University of Colorado Boulder1, Space Sciences Laboratory2, Goddard Space Flight Center3, Lockheed Martin Corporation4, University of Michigan5, Centre national de la recherche scientifique6, Boston University7, Jet Propulsion Laboratory8, Wright State University9, University of Iowa10, University of California, Berkeley11, National Institute of Aerospace12, University of Arizona13
TL;DR: The MAVEN spacecraft has eight science instruments (with nine sensors) that measure the energy and particle input from the Sun into the Mars upper atmosphere, the response of the upper atmosphere to that input, and the resulting escape of gas to space as mentioned in this paper.
Abstract: The MAVEN spacecraft launched in November 2013, arrived at Mars in September 2014, and completed commissioning and began its one-Earth-year primary science mission in November 2014 The orbiter’s science objectives are to explore the interactions of the Sun and the solar wind with the Mars magnetosphere and upper atmosphere, to determine the structure of the upper atmosphere and ionosphere and the processes controlling it, to determine the escape rates from the upper atmosphere to space at the present epoch, and to measure properties that allow us to extrapolate these escape rates into the past to determine the total loss of atmospheric gas to space through time These results will allow us to determine the importance of loss to space in changing the Mars climate and atmosphere through time, thereby providing important boundary conditions on the history of the habitability of Mars The MAVEN spacecraft contains eight science instruments (with nine sensors) that measure the energy and particle input from the Sun into the Mars upper atmosphere, the response of the upper atmosphere to that input, and the resulting escape of gas to space In addition, it contains an Electra relay that will allow it to relay commands and data between spacecraft on the surface and Earth
628 citations
TL;DR: The spin-plane double probe instrument (SDP) is part of the FIELDS instrument suite of the Magnetospheric Multiscale mission (MMS).
Abstract: The Spin-plane double probe instrument (SDP) is part of the FIELDS instrument suite of the Magnetospheric Multiscale mission (MMS). Together with the Axial double probe instrument (ADP) and the Electron Drift Instrument (EDI), SDP will measure the 3-D electric field with an accuracy of 0.5 mV/m over the frequency range from DC to 100 kHz. SDP consists of 4 biased spherical probes extended on 60 m long wire booms 90∘ apart in the spin plane, giving a 120 m baseline for each of the two spin-plane electric field components. The mechanical and electrical design of SDP is described, together with results from ground tests and calibration of the instrument.
591 citations
University of Copenhagen1, Texas A&M University2, Uppsala University3, Natural History Museum4, University of California, Berkeley5, Aarhus University6, Technical University of Denmark7, University of Chicago8, Montana State University9, Stanford University10, University of Montana11, Washington State University12, University of Tartu13, University of Cambridge14, King Abdullah University of Science and Technology15, Royal Holloway, University of London16, Southern Methodist University17, University College London18, University of Illinois at Urbana–Champaign19, Pennsylvania State University20, University of York21, Medical Research Council22
TL;DR: The genome sequence of a male infant recovered from the Anzick burial site in western Montana is sequenced and it is shown that the gene flow from the Siberian Upper Palaeolithic Mal’ta population into Native American ancestors is also shared by the AnZick-1 individual and thus happened before 12,600 years bp.
Abstract: Clovis, with its distinctive biface, blade and osseous technologies, is the oldest widespread archaeological complex defined in North America, dating from 11,100 to 10,700 C-14 years before present (BP) (13,000 to 12,600 calendar years BP)(1,2). Nearly 50 years of archaeological research point to the Clovis complex as having developed south of the North American ice sheets from an ancestral technology(3). However, both the origins and the genetic legacy of the people who manufactured Clovis tools remain under debate. It is generally believed that these people ultimately derived from Asia and were directly related to contemporary Native Americans(2). An alternative, Solutrean, hypothesis posits that the Clovis predecessors emigrated from southwestern Europe during the Last Glacial Maximum(4). Here we report the genome sequence of a male infant (Anzick-1) recovered from the Anzick burial site in western Montana. The human bones date to 10,705 +/- 35 C-14 years BP (approximately 12,707-12,556 calendar years BP) and were directly associated with Clovis tools. We sequenced the genome to an average depth of 14.4x and show that the gene flow from the Siberian Upper Palaeolithic Mal'ta population(5) into Native American ancestors is also shared by the Anzick-1 individual and thus happened before 12,600 years BP. We also show that the Anzick-1 individual is more closely related to all indigenous American populations than to any other group. Our data are compatible with the hypothesis that Anzick-1 belonged to a population directly ancestral to many contemporary Native Americans. Finally, we find evidence of a deep divergence in Native American populations that predates the Anzick-1 individual.
464 citations
University of Copenhagen1, University of Massachusetts Amherst2, University of California, Berkeley3, Wellcome Trust Sanger Institute4, Technical University of Denmark5, Pennsylvania State University6, La Trobe University7, Stanford University8, University of Cambridge9, King Abdullah University of Science and Technology10, University of Tartu11, Estonian Biocentre12, University of California, San Francisco13, Washington State University14, University of Porto15, University of Illinois at Urbana–Champaign16, Carlos III Health Institute17, University of Utah18, Science for Life Laboratory19, Aarhus University20, University College London21, University of Reading22, University of Bristol23, University of Guadalajara24, University of Bologna25, Oregon State University26, University of Paris27, University of Zurich28, St. John's University29, Max Planck Society30, University of California, Irvine31, University of Tarapacá32, University of Toulouse33, Russian Academy of Sciences34, Novosibirsk State University35, Kemerovo State University36, Bashkir State University37, North-Eastern Federal University38, Western Washington University39, Northwest Community College40, University of Western Ontario41, Simon Fraser University42, Laboratory of Molecular Biology43, University of Kansas44, University of California, Davis45, Texas A&M University46, Santa Barbara Museum of Natural History47, Southern Methodist University48
TL;DR: The results suggest that there has been gene flow between some Native Americans from both North and South America and groups related to East Asians and Australo-Melanesians, the latter possibly through an East Asian route that might have included ancestors of modern Aleutian Islanders.
Abstract: How and when the Americas were populated remains contentious. Using ancient and modern genome-wide data, we found that the ancestors of all present-day Native Americans, including Athabascans and Amerindians, entered the Americas as a single migration wave from Siberia no earlier than 23 thousand years ago (ka) and after no more than an 8000-year isolation period in Beringia. After their arrival to the Americas, ancestral Native Americans diversified into two basal genetic branches around 13 ka, one that is now dispersed across North and South America and the other restricted to North America. Subsequent gene flow resulted in some Native Americans sharing ancestry with present-day East Asians (including Siberians) and, more distantly, Australo-Melanesians. Putative "Paleoamerican" relict populations, including the historical Mexican Pericues and South American Fuego-Patagonians, are not directly related to modern Australo-Melanesians as suggested by the Paleoamerican Model.
459 citations
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TL;DR: There is, I think, something ethereal about i —the square root of minus one, which seems an odd beast at that time—an intruder hovering on the edge of reality.
Abstract: There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.
Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …
33,785 citations
01 May 1993
TL;DR: Comparing the results to the fastest reported vectorized Cray Y-MP and C90 algorithm shows that the current generation of parallel machines is competitive with conventional vector supercomputers even for small problems.
Abstract: Three parallel algorithms for classical molecular dynamics are presented. The first assigns each processor a fixed subset of atoms; the second assigns each a fixed subset of inter-atomic forces to compute; the third assigns each a fixed spatial region. The algorithms are suitable for molecular dynamics models which can be difficult to parallelize efficiently—those with short-range forces where the neighbors of each atom change rapidly. They can be implemented on any distributed-memory parallel machine which allows for message-passing of data between independently executing processors. The algorithms are tested on a standard Lennard-Jones benchmark problem for system sizes ranging from 500 to 100,000,000 atoms on several parallel supercomputers--the nCUBE 2, Intel iPSC/860 and Paragon, and Cray T3D. Comparing the results to the fastest reported vectorized Cray Y-MP and C90 algorithm shows that the current generation of parallel machines is competitive with conventional vector supercomputers even for small problems. For large problems, the spatial algorithm achieves parallel efficiencies of 90% and a 1840-node Intel Paragon performs up to 165 faster than a single Cray C9O processor. Trade-offs between the three algorithms and guidelines for adapting them to more complex molecular dynamics simulations are also discussed.
29,323 citations
Journal Article•
TL;DR: It is suggested that the natural selection against large insertion/deletion is so weak that a large amount of variation is maintained in a population.
11,521 citations
01 Aug 2000
TL;DR: Assessment of medical technology in the context of commercialization with Bioentrepreneur course, which addresses many issues unique to biomedical products.
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