674 research outputs found
Log Skeletons: A Classification Approach to Process Discovery
To test the effectiveness of process discovery algorithms, a Process
Discovery Contest (PDC) has been set up. This PDC uses a classification
approach to measure this effectiveness: The better the discovered model can
classify whether or not a new trace conforms to the event log, the better the
discovery algorithm is supposed to be. Unfortunately, even the state-of-the-art
fully-automated discovery algorithms score poorly on this classification. Even
the best of these algorithms, the Inductive Miner, scored only 147 correct
classified traces out of 200 traces on the PDC of 2017. This paper introduces
the rule-based log skeleton model, which is closely related to the Declare
constraint model, together with a way to classify traces using this model. This
classification using log skeletons is shown to score better on the PDC of 2017
than state-of-the-art discovery algorithms: 194 out of 200. As a result, one
can argue that the fully-automated algorithm to construct (or: discover) a log
skeleton from an event log outperforms existing state-of-the-art
fully-automated discovery algorithms.Comment: 16 pages with 9 figures, followed by an appendix of 14 pages with 17
figure
Power-law statistics and stellar rotational velocities in the Pleiades
In this paper we will show that, the non-gaussian statistics framework based
on the Kaniadakis statistics is more appropriate to fit the observed
distributions of projected rotational velocity measurements of stars in the
Pleiades open cluster. To this end, we compare the results from the
and -distributions with the Maxwellian.Comment: 13 pages, 3 figure
Non-gaussian statistics and stellar rotational velocities of main sequence field stars
In this letter we study the observed distributions of rotational velocity in
a sample of more than 16,000 nearby F and G dwarf stars, magnitude complete and
presenting high precision measurements. We show that the velocity
distributions cannot be fitted by a maxwellian. On the other hand, an analysis
based on both Tsallis and Kaniadakis power-law statistics is by far the most
appropriate statistics and give a very good fit. It is also shown that single
and binary stars have similar rotational distributions. This is the first time,
to our knowledge, that these two new statistics are tested for the rotation of
such a large sample of stars, pointing solidly to a solution of the puzzling
problem on the function governing the distribution of stellar rotational
velocityComment: 10 pages, 2 figures, accepted for publication in ApJ Letter
Prevalence of iron deficiency anemia and iron deficiency in a pediatric population with inflammatory bowel disease
OBJECTIVES: Iron deficiency is the most common cause of anemia in children with inflammatory bowel disease, although the real prevalence is unknown. Intravenous iron is suggested as the first line treatment. This study aims to determine the prevalence of iron deficiency anemia in children with inflammatory bowel disease followed in a Pediatric Gastroenterology Unit of a tertiary center and to evaluate this unit's experience with intravenous iron.
MATERIALS AND METHODS: A retrospective cohort study was designed involving children with inflammatory bowel disease followed in that unit between January 2001 and April 2016. Laboratory results were collected at the moment of diagnosis, after one-year follow-up and prior each IV iron administration performed during the study period. Anemia was defined according to World Health Organization criteria and the iron deficiency was defined using recent guidelines.
RESULTS: Were studied 69 patients 71% had CD and 29% UC. 50.7% were female. Mean patient age at diagnosis was 13.3 years (range 1--17 years). Prevalence of ID and IDA at diagnosis was 76.8% and 43.5%, respectively. After one year follow-up, those values decreased to 68.1% (p=.182) and 21.7% (p=.002), respectively. Hemoglobin significantly increased (p<.001). Intravenous iron was administered to 92.8% of patients. No adverse reactions were reported.
CONCLUSIONS: Intravenous iron is the first line in the treatment of Iron deficiency anemia in Inflammatory Bowel disease and it is safe and effective. Persistent anemia and iron deficiency are common.info:eu-repo/semantics/publishedVersio
Incidência da soja louca II nos sistemas plantio direto e convencional.
bitstream/item/143268/1/COMUNICADO-TECNICO-278-OnLine.pd
Avaliacao de plantas medicinais com efeito anti-helmintico para caprinos.
bitstream/item/97562/1/PAND780001.pd
Nonextensivity in the Solar Neighborhood
In the present study, we analyze the radial velocity distribution as a
function of different stellar parameters such as stellar age, mass, rotational
velocity and distance to the Sun for a sample of 6781 single low--mass field
dwarf stars, located in the solar neighborhood. We show that the radial
velocity distributions are best fitted by --Gaussians that arise within the
Tsallis nonextensive statistics. The obtained distributions cannot be described
by the standard Gaussian that emerges within Boltzmann-Gibbs (B--G) statistical
mechanics. The results point to the existence of a hierarchical structure in
phase space, in contrast to the uniformly occupied phase space of B--G
statistical mechanics, driven by the --Central Limit Theorem, consistent
with nonextensive statistical mechanics.Comment: 5 pages, 4 figures: EPL accepte
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