243 research outputs found
Wild boars as a source of antimicrobial resistant Escherichia coli
To reveal wild boars as a reservoir of antimicrobial resistance 332 faecal samples were collected from individual wild boars shot during 42 hunts within two seasons (2012/13 and 2013/14) in 34 regional forests scattered over the whole territory of Poland
Salmonella contamination of pig farm environment, Poland, 2014
Although pork is considered an important source of Salmonella infections, the introduction of control programs in pig farms are not obligatory in the EU. To resolve current epidemiological situation, monitoring of pig farms was introduced in Poland in 2014. The paper reports the first year outputs of the survey
Melanism, body size, and sex ratio in snakes : new data on the grass snake (Natrix natrix) and synthesis
Ground Truth Or Dare: Factors Affecting The Creation Of Medical Datasets For Training AI
One of the core goals of responsible AI development is ensuring high-quality
training datasets. Many researchers have pointed to the importance of the
annotation step in the creation of high-quality data, but less attention has
been paid to the work that enables data annotation. We define this work as the
design of ground truth schema and explore the challenges involved in the
creation of datasets in the medical domain even before any annotations are
made. Based on extensive work in three health-tech organisations, we describe
five external and internal factors that condition medical dataset creation
processes. Three external factors include regulatory constraints, the context
of creation and use, and commercial and operational pressures. These factors
condition medical data collection and shape the ground truth schema design. Two
internal factors include epistemic differences and limits of labelling. These
directly shape the design of the ground truth schema. Discussions of what
constitutes high-quality data need to pay attention to the factors that shape
and constrain what is possible to be created, to ensure responsible AI design
Growth and electronic and magnetic structure of iron oxide films on Pt(111)
Ultrathin (111)-oriented polar iron oxide films were grown on a Pt(111)
single crystal either by the reactive deposition of iron or oxidation of
metallic iron monolayers. These films were characterized using low energy
electron diffraction, scanning tunneling microscopy and conversion electron
Mossbauer spectroscopy. The reactive deposition of Fe led to the island growth
of Fe3O4, in which the electronic and magnetic properties of the bulk material
were modulated by superparamagnetic size effects for thicknesses below 2 nm,
revealing specific surface and interface features. In contrast, the oxide films
with FeO stoichiometry, which could be stabilized as thick as 4 nm under
special preparation conditions, had electronic and magnetic properties that
were very different from their bulk counterpart, w\"ustite. Unusual long range
magnetic order appeared at room temperature for thicknesses between three and
ten monolayers, the appearance of which requires severe structural modification
from the rock-salt structure.Comment: 17 pages, 6 figures, 50 reference
Udar niedokrwienny mózgu leczony trombolitycznie jako pierwsza manifestacja śluzaka lewego przedsionka
Mn clusterisation in Ga1-xMnxN
Local structure of Mn atoms in Ga1-xMnxN has been investigated by the Mn L3
edge x-ray absorption spectrum (XAS) at total electron yield mode, which
preferentially looks at atoms near the surface. A modeling defects
configuration, the Mn5 micro-clusters complexed with substitutional MnGa and
interstitial MnI is found for the higher Mn doping concentration. This new
configuration is also confirmed by the total energy calculations.Comment: 17 pages, 5 figures, to be published in Solid. State Commu
Measurement of the diffractive structure function in deep inelastic scattering at HERA
This paper presents an analysis of the inclusive properties of diffractive
deep inelastic scattering events produced in interactions at HERA. The
events are characterised by a rapidity gap between the outgoing proton system
and the remaining hadronic system. Inclusive distributions are presented and
compared with Monte Carlo models for diffractive processes. The data are
consistent with models where the pomeron structure function has a hard and a
soft contribution. The diffractive structure function is measured as a function
of \xpom, the momentum fraction lost by the proton, of , the momentum
fraction of the struck quark with respect to \xpom, and of . The \xpom
dependence is consistent with the form \xpoma where
in all bins of and
. In the measured range, the diffractive structure function
approximately scales with at fixed . In an Ingelman-Schlein type
model, where commonly used pomeron flux factor normalisations are assumed, it
is found that the quarks within the pomeron do not saturate the momentum sum
rule.Comment: 36 pages, latex, 11 figures appended as uuencoded fil
Evolution and environment of the eastern linear pottery culture: A case study in the site of Polgár-Piócási-Dűlő
A salvage excavation preceding a major investment project was conducted in 2006–2007, during which associated settlement features of a Middle Neolithic, Eastern Linear Pottery Culture (Alföld Linearbandkeramik – ALBK) were uncovered in an area called Piócási-dűlő on the eastern outskirts of Polgár. The features of the ALBK settlement date from two periods. The cluster of multi-functional pits yielding a rich assortment of finds, the handful of post-holes and an unusual ritual well found in the southern part of the investigated area formed one unit from the earliest phase of the Middle Neolithic (ALBK I). The settlement’s other occupation can be assigned to the late phase of the Middle Neolithic (ALBK IV). Five houseplans representing the remains of timber-framed buildings outlined a distinct area with three multi-functional pits. Associated with the above features were 8 burials.
The preliminary archaeobotanical results from Polgár–Piócási-dűlő are based on the plant material found within the sediments of 11 archaeological structures, which mainly represent pits and a welI. It can be stated that the natural environment offered habitats in which oak trees dominated in the local vegetation, forming floodplain forests and wooded steppes. They also provided food in the form of fruits and formed an optimal habitat for domestic animals. Arable fields were probably also established in the vicinity of the settlements, suggested by findings of macroscopic plant remains that represented cultivated species.
In both settlement phases lithic production activities are manifested both by the local on-site lithic production and – most importantly – by the presence of imported, mainly mesolocal, raw materials that point to contacts with deposit areas, or off-site preliminary working of obsidian and limnoquartzites. The kit of harvesting tools and a large number of grinding stones – especially in the younger phase – for the preparation of plant food suggest a major role of plant cultivation
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