Search Results - (Author, Cooperation:R. G. Roberts)
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1Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2014-01-11Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Animals ; Australia ; *Climate Change ; Engraving and Engravings/history ; *Extinction, Biological ; Food Chain ; History, Ancient ; Humans ; Models, Biological ; Paintings/history ; *Population Dynamics ; *WolvesPublished by: -
2Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2012-06-05Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Animals ; Anthropology ; Caves ; Fires/*history ; Geologic Sediments ; History, Ancient ; *Hominidae/psychology ; South Africa ; Time FactorsPublished by: -
3Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2013-08-24Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Animals ; Archaeology/history ; Art/history ; Australia ; Caves ; Fossils ; History, 20th Century ; History, 21st Century ; Hominidae/anatomy & histology/*classification ; Indonesia ; Paleontology/*historyPublished by: -
4Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2015-04-24Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Aluminum Silicates/chemistry/radiation effects ; *Chronology as Topic ; *Electrons ; Extraterrestrial Environment/chemistry ; Geologic Sediments/*chemistry ; Lasers ; Mars ; Optics and Photonics/*methods ; Potassium Compounds/chemistry/radiation effects ; Quartz/chemistry/radiation effects ; Radiation, Ionizing ; Radiometric Dating ; *Sunlight ; Time FactorsPublished by: -
5Latest Papers from Table of Contents or Articles in PressT. Sutikna ; M. W. Tocheri ; M. J. Morwood ; E. W. Saptomo ; Jatmiko ; R. D. Awe ; S. Wasisto ; K. E. Westaway ; M. Aubert ; B. Li ; J. X. Zhao ; M. Storey ; B. V. Alloway ; M. W. Morley ; H. J. Meijer ; G. D. van den Bergh ; R. Grun ; A. Dosseto ; A. Brumm ; W. L. Jungers ; R. G. Roberts
Nature Publishing Group (NPG)
Published 2016Staff ViewPublication Date: 2016-03-31Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Aluminum Silicates ; Animals ; *Archaeology ; Australia ; Calibration ; Caves ; *Fossils ; Geologic Sediments/analysis ; Glass ; *Hominidae ; Humans ; Indonesia ; Potassium Compounds ; Quartz ; *Radiometric Dating ; Time Factors ; UncertaintyPublished by: -
6Latest Papers from Table of Contents or Articles in PressE. Willerslev ; J. Davison ; M. Moora ; M. Zobel ; E. Coissac ; M. E. Edwards ; E. D. Lorenzen ; M. Vestergard ; G. Gussarova ; J. Haile ; J. Craine ; L. Gielly ; S. Boessenkool ; L. S. Epp ; P. B. Pearman ; R. Cheddadi ; D. Murray ; K. A. Brathen ; N. Yoccoz ; H. Binney ; C. Cruaud ; P. Wincker ; T. Goslar ; I. G. Alsos ; E. Bellemain ; A. K. Brysting ; R. Elven ; J. H. Sonstebo ; J. Murton ; A. Sher ; M. Rasmussen ; R. Ronn ; T. Mourier ; A. Cooper ; J. Austin ; P. Moller ; D. Froese ; G. Zazula ; F. Pompanon ; D. Rioux ; V. Niderkorn ; A. Tikhonov ; G. Savvinov ; R. G. Roberts ; R. D. MacPhee ; M. T. Gilbert ; K. H. Kjaer ; L. Orlando ; C. Brochmann ; P. Taberlet
Nature Publishing Group (NPG)
Published 2014Staff ViewPublication Date: 2014-02-07Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Animals ; Arctic Regions ; *Biodiversity ; Bison/physiology ; Cold Climate ; *Diet ; Freezing ; *Herbivory ; High-Throughput Nucleotide Sequencing ; Horses/physiology ; Mammoths/physiology ; *Nematoda/classification/genetics/isolation & purification ; *Plants/classification/genetics ; Poaceae/genetics/growth & development ; Soil ; Time Factors ; Yukon TerritoryPublished by: -
7Latest Papers from Table of Contents or Articles in PressG. D. van den Bergh ; B. Li ; A. Brumm ; R. Grun ; D. Yurnaldi ; M. W. Moore ; I. Kurniawan ; R. Setiawan ; F. Aziz ; R. G. Roberts ; Suyono ; M. Storey ; E. Setiabudi ; M. J. Morwood
Nature Publishing Group (NPG)
Published 2016Staff ViewPublication Date: 2016-01-15Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Animals ; *Fossils ; History, Ancient ; *Hominidae ; Human Migration/history ; Humans ; Indonesia ; Tool Use BehaviorPublished by: -
8Articles: DFG German National LicensesRoberts, R. G. ; Hagston, W. E. ; Harrison, P.
[S.l.] : American Institute of Physics (AIP)
Published 1996Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: The possibility of using spin-flip Raman spectroscopy as a tool for determining accurately the disorder in magnetic superlattice (SL) microstructures is examined theoretically. It is shown that the spin-flip Raman spectra for a weakly coupled SL, disordered in units of monolayers, will consist of a number of peaks equal to the number of possible values of the disorder (m) in a given quantum well associated with a given value of the magnitude of the disorder (M). The various peaks can be associated with a particular value of m from observation of their relative intensities. © 1996 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
9Articles: DFG German National LicensesRoberts, R. G. ; Hagston, W. E. ; Chen, P. ; Nicholls, J. E. ; O'Neill, M.
[S.l.] : American Institute of Physics (AIP)
Published 1997Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: The effects on the carrier wave functions of introducing monolayer disorder at the heterojunction interfaces of an undoped superlattice are elucidated. In particular the rate and extent of the resulting localization is quantified by means of an entity C, which is the joint probability of finding two carriers in the same region of space. Evaluating the latter for all states in the miniband provides clear evidence for the existence of a mobility edge in finite two-dimensional structures. Using the entity C as the basis for a semiclassical evaluation of carrier transport, it is shown that the experimentally observed activated transport can be accounted for in terms of the excitation of carriers from the localized states at the bottom of the miniband into the more extended midband miniband states. Comparison of the theoretical results with the experimental results given [Chen et al., J. Cryst. Growth 159, 1066 (1996)], enables conclusions to be drawn concerning the mechanism of activated carrier transport in doped superlattice systems. © 1997 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
10Articles: DFG German National LicensesStaff View
ISSN: 1365-2044Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: MedicineType of Medium: Electronic ResourceURL: -
11Articles: DFG German National LicensesStaff View
ISSN: 1365-2044Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: MedicineType of Medium: Electronic ResourceURL: -
12Articles: DFG German National LicensesStaff View
ISSN: 1365-2044Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: MedicineType of Medium: Electronic ResourceURL: -
13Articles: DFG German National LicensesStaff View
ISSN: 1365-246XSource: Blackwell Publishing Journal Backfiles 1879-2005Topics: GeosciencesNotes: Working in the complex demodulate domain allows elegant and efficient analysis of broadband three-component seismic data recorded at a single station. The analysis procedures are based upon the auto- and cross-covariances of the various pairs of components, and allow effective decomposition of many recorded time series into ‘phases’ according to frequency, wave type, direction of propagation, and apparent surface velocity or ellipticity.Type of Medium: Electronic ResourceURL: -
14Articles: DFG German National LicensesRoberts, R. G. ; Christoffersson, A. ; Cassidy, F.
Oxford, UK : Blackwell Publishing Ltd
Published 1989Staff ViewISSN: 1365-246XSource: Blackwell Publishing Journal Backfiles 1879-2005Topics: GeosciencesNotes: A new technique for the analysis of three-component seismic data from a single station is presented. Based upon the auto- and cross-correlations of the three orthogonal components within a short time window an assessment is made of whether these data are consistent with the arrival of a P-wave or a linearly polarized S-wave which has a vertical component of motion. In many cases the procedure can discriminate between a major P-phase and S-phases or later arriving P-phases from analysis of the coda after the first detected arrival. the method is computationally efficient, providing for P-wave detections including estimates of azimuth, apparent surface velocity, and (for teleseismic events) source location, in real time on a small personal computer.Type of Medium: Electronic ResourceURL: -
15Articles: DFG German National LicensesStaff View
ISSN: 1365-246XSource: Blackwell Publishing Journal Backfiles 1879-2005Topics: GeosciencesNotes: The fast Fourier transform enables us to transform time series data efficiently between the time, frequency, ‘complex trace’ and ‘complex demodulate’ domains. The complex demodulate domain is related to the complex trace domain via a time-dependent phase rotation and optimal resampling. Data manipulation in any one domain has equivalents in the other domains, which may be more computationally efficient. Thus if we wish we can process seismic reflection data entirely in the complex demodulate (CD) domain. Working in the CD domain allows us to apply certain approximations which in turn allow us to carry out some involved operations very much more efficiently than in the time or frequency domains. We present some basic theory, some simple examples and an application to residual static estimation on crystalline bedrock. For this data a non-linear stackpower optimization in the CD domain had run times significantly less than those of similar processing in the time domain, and produced essentially identical results. Using a more narrow frequency band degrades the results only slightly, and decreases run times by a factor of up to 20 compared to the time domain processing.Type of Medium: Electronic ResourceURL: -
16Articles: DFG German National LicensesStaff View
ISSN: 1365-2044Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: MedicineType of Medium: Electronic ResourceURL: -
17Articles: DFG German National LicensesStaff View
ISSN: 1365-2044Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: MedicineType of Medium: Electronic ResourceURL: -
18Articles: DFG German National LicensesJatmiko ; Sutikna, T. ; Wahyu Saptomo, E. ; Westaway, K. E. ; Awe Due, Rokus ; Roberts, R. G. ; Maeda, T. ; Wasisto, S. ; Djubiantono, T. ; Morwood, M. J. ; Brown, P.
[s.l.] : Nature Publishing Group
Published 2005Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Homo floresiensis was recovered from Late Pleistocene deposits on the island of Flores in eastern Indonesia, but has the stature, limb proportions and endocranial volume of African Pliocene Australopithecus. The holotype of the species (LB1), excavated in 2003 from Liang Bua, consisted of a ...Type of Medium: Electronic ResourceURL: -
19Articles: DFG German National LicensesStaff View
ISSN: 1573-0956Source: Springer Online Journal Archives 1860-2000Topics: GeosciencesPhysicsNotes: Abstract Methods of analysis of long period geomagnetic variations (periods over a few hours), the available electromagnetic response function estimates, and the effect of lateral inhomogeneity within the Earth are reviewed. Recent advances in the inversion of response function data to produce conductivitydepth profiles are mentioned, and aspects of the inverse problem specific to global (spherical Earth) induction are discussed. There is a rapid rise in electrical conductivity between about 400 km and 800 km, but whether this is a gradual change or consists of one or several steps is not resolvable with the presently available data and naive inversion algorithm used here. At the greatest depths to which presently analysed variations penetrate (1000–1500 km), available data have some difficulty in resolving finer structure, but there are indications that the electrical structure of the continents becomes more laterally homogeneous as depth increases. Previously published inversions see lateral variations in electrical structure down to at least 500 km, and at shallower depths these variations are unambiguously resolved.Type of Medium: Electronic ResourceURL: -
20Articles: DFG German National LicensesSoejono, R. P. ; Sutikna, T. ; Turney, C. S. M. ; Westaway, K. E. ; Rink, W. J. ; Zhao, J.- x. ; van den Bergh, G. D. ; Due, Rokus Awe ; Hobbs, D. R. ; Moore, M. W. ; Bird, M. I. ; Fifield, L. K. ; Morwood, M. J. ; Roberts, R. G.
[s.l.] : Macmillian Magazines Ltd.
Published 2004Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Excavations at Liang Bua, a large limestone cave on the island of Flores in eastern Indonesia, have yielded evidence for a population of tiny hominins, sufficiently distinct anatomically to be assigned to a new species, Homo floresiensis. The finds comprise the cranial and some post-cranial ...Type of Medium: Electronic ResourceURL: