186,479 research outputs found
A guide to good practice in Mediterranean surface survey projects
No full textAuthor contribution: the idea for this article emerged from extensive discussions at the twiceyearly International Mediterranean Survey Workshops. Bintliff and Attema took the lead in collecting the literature and drafting the text, using input from all other authors. Attema and Van Leusen drafted the recommendations.Peer reviewe
In search of a preferred preference elicitation method: A test of the internal consistency of choice and matching tasks
No full textThe numerous reports on preference reversals in preference elicitations pose a great challenge to empirical economics. Many studies have found that different procedures may generate substantially different preferences. However, little is known about whether one procedure is more susceptible to preference reversals than another. Therefore, taking the preference reversals as a robust behavioral pattern, guidelines are called for to provide directions regarding a preferred preference elicitation task. This paper puts forward a new test of the internal consistency of choice and matching tasks, based on “internal preference reversals”. We replicate the preference reversal phenomenon and find a significant higher consistency within choice tasks than within matching tasks.preference reversal; internal consistency; scale compatibility; loss aversion; choice; matching
Sentinel-1 Imaging Performance Verification with TerraSAR-X
No full textThis paper presents dedicated analyses of TerraSAR-X data with respect to the Sentinel-1 TOPS imaging mode.
First, the analysis of Doppler centroid behaviour for high azimuth steering angles, as occurs in TOPS imaging, is
investigated followed by the analysis and compensation of residual scalloping. Finally, the Flexible-Dynamic
BAQ (FD-BAQ) raw data compression algorithm is investigated for the first time with real TerraSAR-X data
and its performance is compared to state-of-the-art BAQ algorithms. The presented analyses demonstrate the
improvements of the new TOPS imaging mode as well as the new FD-BAQ data compression algorithm for
SAR image quality in general and in particular for Sentinel-1
Prefazione [a Papers in Italian archaeology 6. : communities and settlements from the Neolithic to the early medieval period : proceedings of the 6th conference of Italian archaeology held at the University of Groningen, Groningen Institute of archaeology, the Netherlands, April 15-17, 2003]
No full textThe Avellino Event. Cultural and Demographic Effects of the Great Bronze Age Eruption of Mount Vesuvius. Overview of main project results, publications and valorisation activities
No full textBetween 2015 and 2019, a team of archaeologists, palaeobotanists and geologists from the Universities of Groningen, Amsterdam and Leiden looked into the distal effects of a powerful eruption of the Somma–Vesuvius volcano in Campania on the former wetlands of the Agro Pontino and Fondi coastal plains in Central Tyrrhenian Italy. These wetlands are located c. 60 km south of Rome and between 90 and 140 km north-west of Mount Vesuvius. The ‘Avellino’ eruption took place during an advanced stage of the Early Bronze Age and was radiocarbon dated around 1900 BCE. This article reports on the results of the research programme “The Avellino Event: Cultural and Demographic Effects of the Great Bronze Age Eruption of Mount Vesuvius”, funded by the Dutch Research Council. The team’s main hypothesis, that people living in the surroundings of Mount Vesuvius in the Early Bronze Age who had time to escape the proximal effects of the eruption – pyroclastic flows and heavy ash falls – fled to the relative safety of nearby coastal areas to build a temporary or permanent new existence, was disproved by field evidence early on. No major environmental and archaeological impacts were evident in the archaeological and environmental record of the study area around the date of the eruption. Nonetheless, the research resulted in a significant increase in geological and palaeobotanical data, which has proved extremely useful for the reconstruction of the longue durée of human–landscape interactions. The Avellino tephra was a most reliable chronological horizon in this reconstruction contributing to the overall objectives of the long-running Pontine Region Project of the University of Groningen. This contribution contains an overview of the main results of the Avellino Event Project, including an overview of scientific publications, valorisation output, and a brief discussion of some remarkable spin-off projects
Papers in Italian Archaeology VI. Communities and Settlements from the Neolithic to the Medieval Period
No full textGMES Sentinel-1 FDBAQ Performance Analysis
No full textModern operational and/or high resolution SAR
satellite missions impose stringent requirements on on-board
data compression such as a higher data reduction ratio, more
flexibility, and faster data throughput. A novel approach is
Flexible Dynamic Block Adaptive Quantization (FDBAQ). This
method outperforms currently used Block Adaptive
Quantization with respect to Signal-to-Noise-Ratio related to the
compression ratio. The FDBAQ method allows bit rate
programmability with non-integer rates. This allows the SAR
information throughput to be optimized for different types of
targets and down-link scenari
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Supplementary_Table_II – Supplemental material for Holocene vegetation record of upland northern Calabria, Italy: Environmental change and human impact
No full textSupplemental material, Supplementary_Table_II for Holocene vegetation record of upland northern Calabria, Italy: Environmental change and human impact by Jan Sevink, Corrie C Bakels, Peter Attema, Mauro di Vito and Ilenia Arienzo in The Holocene</p
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