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Sökning: WFRF:(Grabowski Radoslaw)

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  • Blanton, Michael R., et al. (författare)
  • Sloan Digital Sky Survey IV : Mapping the Milky Way, Nearby Galaxies, and the Distant Universe
  • 2017
  • Ingår i: Astronomical Journal. - IOP Publishing. - 0004-6256. ; 154:1
  • Forskningsöversikt (refereegranskat)abstract
    • We describe the Sloan Digital Sky Survey IV (SDSS-IV), a project encompassing three major spectroscopic programs. The Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2) is observing hundreds of thousands of Milky Way stars at high resolution and high signal-to-noise ratios in the near-infrared. The Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey is obtaining spatially resolved spectroscopy for thousands of nearby galaxies (median z ∼ 0.03). The extended Baryon Oscillation Spectroscopic Survey (eBOSS) is mapping the galaxy, quasar, and neutral gas distributions between z ~ 0.6 and 3.5 to constrain cosmology using baryon acoustic oscillations, redshift space distortions, and the shape of the power spectrum. Within eBOSS, we are conducting two major subprograms: the SPectroscopic IDentification of eROSITA Sources (SPIDERS), investigating X-ray AGNs and galaxies in X-ray clusters, and the Time Domain Spectroscopic Survey (TDSS), obtaining spectra of variable sources. All programs use the 2.5 m Sloan Foundation Telescope at the Apache Point Observatory; observations there began in Summer 2014. APOGEE-2 also operates a second near-infrared spectrograph at the 2.5 m du Pont Telescope at Las Campanas Observatory, with observations beginning in early 2017. Observations at both facilities are scheduled to continue through 2020. In keeping with previous SDSS policy, SDSS-IV provides regularly scheduled public data releases; the first one, Data Release 13, was made available in 2016 July.
  • Grabowski, Radoslaw, 1982- (författare)
  • Cereal cultivation in east-central Jutland during the Iron Age, 500 BC–AD 1100
  • 2013
  • Ingår i: Danish Journal of Archeology. - 2166-2290. ; 2:2, s. 164-196
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>This article aims at presenting a cereal cultivation history for the Iron Age (500 BC–AD 1100) in east-central Jutland (Vejle and Århus County). The developments in cereal cultivation are presented based on recent investigations of material from the Iron Age sites of Gedved Vest and Kristinebjerg Øst, as well as a compilation of 10 previously analysed sites.The combined data show that barley (Hordeum vulgare) was the dominant cereal throughout the period, with a seemingly rapid shift from naked barley (Hordeum vulgare var nudum) to hulled barley (Hordeum vulgare var vulgare) around the year 1 BC/AD. Rye (Secale cereale) is present in archaeobotanical assemblages throughout the period, but secure evidence of its cultivation exist only from the end of the second century AD onward. From the fourth century AD onward, the record indicates that rye may have been utilised as a dominant crop alongside barley.The cultivation of subdominant cereals, hulled wheats (Triticum dicoccum/spelta/monococcum), naked bread wheat (Triticum aestivum) and oat (Avena sativa), is also discussed. A reappearance of naked barley during the fourth to sixth century AD is also elaborated upon.Agricultural strategies are assessed based on the material and an interpretation is put forward that cultivation from the fifth century BC to at least the third century AD took place on manured, spring sown fields, which were slowly rotated between cultivation and fallow. The shift toward crop-rotation of barley and rye is also investigated</p>
  • Grabowski, Radoslaw, 1982- (författare)
  • Cereal husbandry and settlement Expanding archaeobotanical perspectives on the southern Scandinavian Iron Age
  • 2014
  • Doktorsavhandling (övrigt vetenskapligt)abstract
    • <p>The here presented PhD project explores the phenomenon of cereal cultivation during the Iron Age (c. 500 BC – AD 1100) in southern Scandinavia. The main body of the thesis consists of four articles. These were written with the aim to identify chronological, geographical, theoretical and methodological gaps in current research, to develop, apply and evaluate approaches to how new knowledge on Iron Age cereal cultivation can be attained, and to assess the interaction between archaeobotany and other specialisms currently used in settlement archaeology. The introduction section of the thesis also contains a historical overview of archaeobotanical research on cereal cultivation in southern Scandinavia.</p><p>The first article is a compilation and summary of all available previously performed  archaeobotanical investigations in southern Sweden. This data is compared and discussed in relation to similar publications in Denmark and smaller scale compilations previously published in Sweden. The main result of the study is an updated and enhanced understanding of the main developments in the investigation area and a deepened knowledge of local development chronologies and trajectories in different parts of southern Sweden.</p><p>The second article is a methodological presentation of a multiproxy analysis combining plant macrofossil analysis, phosphate analysis, magnetic susceptibility analysis and measurement of soil organic matter by loss on ignition. The applicability of the method for identification and delineation of space functions on southern Scandinavian Iron Age sites is discussed and illustrated by two case studies from the Danish site of Gedved Vest. Particular focus is placed on exploration of the use of the functional analysis for assessment of taphonomic and operational contexts of carbonised plant macrofossil assemblages.</p><p>The third article aims at presenting an Iron Age cereal cultivation history for east-central Jutland, an area identified at the outset of the project as under-represented in archaeobotanical studies. The article combines data from depth analyses of material from the sites of Gedved Vest and Kristinebjerg Øst (analysed with the methods and theory presented in the second article) with a compilation of previously performed archaeobotanical analyses from east-central Jutland. The main results of the study are that developments in the study area appear to follow a chronology similar to that previously observed on Funen rather than the rest of the peninsula. Rye cultivation is furthermore discussed as more dynamic and flexible than previously presented in Scandinavian archaeobotanical literature.</p><p>The fourth and final article leaves archaeobotany as the main topic. It focuses instead on evaluating, theorising and expanding the multiproxy method presented in the second article by a thorough comparison of the botanical, geochemical and geophysical methods to other techniques of functional analysis currently used in archaeology. These techniques include studies of artefact distributions, assessments of spatial relations between settlement features, and studies of the structural details of dwellings and other constructions. The main result is that there is a correspondence between the functional indications provided by botanical, geochemical and geophysical methods and techniques used in mainstream archaeology. The comparison furthermore shows that a combination of the two data sets allows for more highly resolved functional interpretations than if they are used separately.</p><p>The main conclusion of the PhD thesis, based on the discussions in all four articles, is that archaeobotanical questions commonly necessitate the assessment of non-botanical archaeological material. The comparison of archaeobotanical data to other segments of the archaeological record does, however, enable the use of the former as an archaeological resource for addressing non-botanical questions. The increased understanding of (mainly settlement) site dynamics resulting from this integration of methods allows archaeobotanists to address increasingly complex botanical questions. Increased and more structured integration between archaeobotany and other specialisms operating within the framework of settlement archaeology is therefore argued to be the preferred approach to performing both high quality archaeobotany and settlement archaeology.</p>
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