304 research outputs found

    Looking Back and Looking Forward: Anaphora and Cataphora in Italian

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    Pronoun interpretation is central for comprehension. Prior work focused mostly on anaphora, where pronouns refer to ­previously-mentioned antecedents. Less research is on cataphora, where antecedents follow pronouns. Existing work suggests cataphora triggers an active-search mechanism: The parser actively searchers for a syntactically-licenses antecedent. Our results on Italian null and overt subject pronouns show that both processing constraints (“impatient parser”) and the grammatical properties of referring expressions contribute to the outcome of reference resolution; parsers try to “discharge” unresolved pronouns when encountered first (i.e., cataphora) due to a processing load of keeping an unresolved pronoun in memory, even if this goes against grammar specific properties. Furthermore, in line with related research, we find that strong grammatical principles (Binding Theory) are powerful enough to “block” processing effects, contributing to our view of how different components of language processing interact

    Conodonts in the Nature Park: Exploring Our History

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    Are conodonts present in the Nature Park? Can we identify them and use them to determine the age of the rocks in the Nature Park? Do the specimens we find in the Nature Park match the species found in previous studies of the Ste. Genevieve Limestone? To answer these questions, we processed limestone samples by manually extracting them and crushing those samples. We then dry sieved samples using 18-20 micron pans, and then combined sorted grains with 10% acetic acid. Those contents were wet sieved with 60 and 120 microns pans. This method allowed us to extract approximately 30 specimens to be examined under a scope for the identification process. Using the multi element approach, we were able to identify P, S, and M series elements. Ozarkodina, Spathognathodus, and Neoprioniodus were most commonly identified and found in both the upper and lower layers of the quarry wall. Some specimens that were only expected to be found in St. Louis Limestone were found in our outcrop, which we initially hypothesized to be the Ste. Genevieve Limestone. Explanations for these results could be that the quarry falls partially in the Ste. Genevieve and the St. Louis Limestone or there were potential errors made in the identification process, resulting in incorrect placement of the boundary. Our data was inconclusive and would require further research to bring more conclusive results

    A locally time-invariant metric for climate model ensemble predictions of extreme risk

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    Adaptation-relevant predictions of climate change are often derived by combining climate model simulations in a multi-model ensemble. Model evaluation methods used in performance-based ensemble weighting schemes have limitations in the context of high-impact extreme events. We introduce a locally time-invariant method for evaluating climate model simulations with a focus on assessing the simulation of extremes. We explore the behaviour of the proposed method in predicting extreme heat days in Nairobi and provide comparative results for eight additional cities

    Two-year history of lymphadenopathy and fever caused by Bartonella henselae in a child

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    We report the case of a 6-year-old boy that presented with enlarged lymph nodes on his neck. He complained of tiredness and discouragement, which worsened during feverish periods. There were no relevant laboratory test abnormalities and serological tests were not reactive. Bartonella henselae DNA was detected by species-specific nested polymerase chain reaction. After treatment, the patient progressed with no fever or lymphadenopathy. Bartonellosis is a group of infectious diseases caused by bacteria of the genus Bartonella. This case report is a useful reminder to clinicians that long-term fever of unknown origin can be related to B. henselae infection, even if the specific serology is not reactive

    Seizure burden in severe earlyâ life epilepsy: Perspectives from parents

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    ObjectivesSeizure burden is typically measured by seizure frequency yet it entails more than seizure counts, especially for people with severe epilepsies and their caregivers. We aimed to characterize the multiâ faceted nature of seizure burden in young people and their parents who are living with severe earlyâ life epilepsies.MethodsA oneâ day workshop and a series of teleconferences were held with parents of children with severe, refractory epilepsy of earlyâ life origin and providers for children with epilepsy. The workshop sessions were structured as focus groups and aimed to identify components of seizure burden and their impact from the perspective of parents and providers. Data were gathered, organized, and refined during the workshop using an iterative 4â step process that drew upon grounded theory.ResultsThree primary components of seizure burden were identified: frequency, severity, and unpredictability, which was as important if not more important at times than frequency and severity. Caregivers noted that the impacts of seizures were experienced as acuteâ immediate consequences, longerâ term consequences, and as chronic effects that develop and evolve over time. The severity of the child’s neurological and medical status as well as where in the disease journey a family was represented additional contextual factors that influenced the experience of seizure burden.SignificancePatientâ reported and patientâ centered outcomes are increasingly incorporated into the evaluation of treatment effectiveness. Without understanding how the disease creates burden for the patient (or family), it is difficult to know how to assess the impact of treatment. Our preliminary findings indicate seizure burden is a complex construct and unpredictability can be as important as frequency and severity.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/149509/1/epi412319_am.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/149509/2/epi412319.pd

    The Oxford-Dartmouth Thirty Degree Survey II: Clustering of Bright Lyman Break Galaxies - Strong Luminosity Dependent Bias at z=4

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    We present measurements of the clustering properties of bright (L>LL>L_{*}) z\sim4 Lyman Break Galaxies (LBGs) selected from the Oxford-Dartmouth Thirty Degree Survey (ODT). We describe techniques used to select and evaluate our candidates and calculate the angular correlation function which we find best fitted by a power law, ω(θ)=Awθβ\omega(\theta)=A_{w}\theta^{-\beta} with Aw=15.4A_{w}=15.4 (with θ\theta in arcseconds), using a constrained slope of β=0.8\beta=0.8. Using a redshift distribution consistent with photometric models, we deproject this correlation function and find a comoving r0=11.41.9+1.7r_{0}=11.4_{-1.9}^{+1.7} h1001_{100}^{-1} Mpc in a Ωm=0.3\Omega_m=0.3 flat Λ\Lambda cosmology for iAB24.5i_{AB}\leq24.5. This corresponds to a linear bias value of b=8.12.6+2.0b=8.1_{-2.6}^{+2.0} (assuming σ8=0.9\sigma_{8}=0.9). These data show a significantly larger r0r_{0} and bb than previous studies at z4z\sim4. We interpret this as evidence that the brightest LBGs have a larger bias than fainter ones, indicating a strong luminosity dependence for the measured bias of an LBG sample. Comparing this against recent results in the literature at fainter (sub-LL_{*}) limiting magnitudes, and with simple models describing the relationship between LBGs and dark matter haloes, we discuss the implications on the implied environments and nature of LBGs. It seems that the brightest LBGs (in contrast with the majority sub-LL_{*} population), have clustering properties, and host dark matter halo masses, that are consistent with them being progenitors of the most massive galaxies today.Comment: Accepted for Publication in MNRAS. 15 Pages, 13 Figure

    The WiggleZ Dark Energy Survey: the transition to large-scale cosmic homogeneity

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    We have made the largest-volume measurement to date of the transition to large-scale homogeneity in the distribution of galaxies. We use the WiggleZ survey, a spectroscopic survey of over 200,000 blue galaxies in a cosmic volume of ~1 (Gpc/h)^3. A new method of defining the 'homogeneity scale' is presented, which is more robust than methods previously used in the literature, and which can be easily compared between different surveys. Due to the large cosmic depth of WiggleZ (up to z=1) we are able to make the first measurement of the transition to homogeneity over a range of cosmic epochs. The mean number of galaxies N(<r) in spheres of comoving radius r is proportional to r^3 within 1%, or equivalently the fractal dimension of the sample is within 1% of D_2=3, at radii larger than 71 \pm 8 Mpc/h at z~0.2, 70 \pm 5 Mpc/h at z~0.4, 81 \pm 5 Mpc/h at z~0.6, and 75 \pm 4 Mpc/h at z~0.8. We demonstrate the robustness of our results against selection function effects, using a LCDM N-body simulation and a suite of inhomogeneous fractal distributions. The results are in excellent agreement with both the LCDM N-body simulation and an analytical LCDM prediction. We can exclude a fractal distribution with fractal dimension below D_2=2.97 on scales from ~80 Mpc/h up to the largest scales probed by our measurement, ~300 Mpc/h, at 99.99% confidence.Comment: 21 pages, 16 figures, accepted for publication in MNRA
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