144 research outputs found

    KiDS+VIKING-450 and DES-Y1 combined:Cosmology with cosmic shear

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    We present a combined tomographic weak gravitational lensing analysis of the Kilo Degree Survey (KV450) and the Dark Energy Survey (DES-Y1). We homogenize the analysis of these two public cosmic shear datasets by adopting consistent priors and modeling of nonlinear scales, and determine new redshift distributions for DES-Y1 based on deep public spectroscopic surveys. Adopting these revised redshifts results in a 0.8σ0.8\sigma reduction in the DES-inferred value for S8S_8, which decreases to a 0.5σ0.5\sigma reduction when including a systematic redshift calibration error model from mock DES data based on the MICE2 simulation. The combined KV450 + DES-Y1 constraint on S8=0.7620.024+0.025S_8 = 0.762^{+0.025}_{-0.024} is in tension with the Planck 2018 constraint from the cosmic microwave background at the level of 2.5σ2.5\sigma. This result highlights the importance of developing methods to provide accurate redshift calibration for current and future weak lensing surveys.Comment: 8 pages, 4 figures, new appendix added including a simulated analysis, version accepted for publication by A&A Letters, chains can be found at https://github.com/sjoudaki/kidsde

    The parent?infant dyad and the construction of the subjective self

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    Developmental psychology and psychopathology has in the past been more concerned with the quality of self-representation than with the development of the subjective agency which underpins our experience of feeling, thought and action, a key function of mentalisation. This review begins by contrasting a Cartesian view of pre-wired introspective subjectivity with a constructionist model based on the assumption of an innate contingency detector which orients the infant towards aspects of the social world that react congruently and in a specifically cued informative manner that expresses and facilitates the assimilation of cultural knowledge. Research on the neural mechanisms associated with mentalisation and social influences on its development are reviewed. It is suggested that the infant focuses on the attachment figure as a source of reliable information about the world. The construction of the sense of a subjective self is then an aspect of acquiring knowledge about the world through the caregiver's pedagogical communicative displays which in this context focuses on the child's thoughts and feelings. We argue that a number of possible mechanisms, including complementary activation of attachment and mentalisation, the disruptive effect of maltreatment on parent-child communication, the biobehavioural overlap of cues for learning and cues for attachment, may have a role in ensuring that the quality of relationship with the caregiver influences the development of the child's experience of thoughts and feelings

    Decifra-me ou te devoro! As finanças e a sociedade brasileira

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    AMON: a wearable multiparameter medical monitoring and alert system

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    This paper describes an advanced care and alert portable telemedical monitor (AMON), a wearable medical monitoring and alert system targeting high-risk cardiac/respiratory patients. The system includes continuous collection and evaluation of multiple vital signs, intelligent multiparameter medical emergency detection, and a cellular connection to a medical center. By integrating the whole system in an unobtrusive, wrist-worn enclosure and applying aggressive low-power design techniques, continuous long-term monitoring can be performed without interfering with the patients' everyday activities and without restricting their mobility. In the first two and a half years of this EU IST sponsored project, the AMON consortium has designed, implemented, and tested the described wrist-worn device, a communication link, and a comprehensive medical center software package. The performance of the system has been validated by a medical study with a set of 33 subjects. The paper describes the main concepts behind the AMON system and presents details of the individual subsystems and solutions as well as the results of the medical validation

    Differentiating Alzheimer\u27s disease from Huntington\u27s disease with the Wechsler Memory Scale-Revised

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    The WMS-R represents a significant improvement over the original version of the WMS. Patterns of performance on the five WMS-R indices successfully differentiated patients with a \u27cortical\u27 (that is, DAT) from patients with a \u27subcortical\u27 (that is, HD) dementia. The differences between ACI and GMI also indicated that DAT patients\u27 attention and concentration were better preserved than those of equally demented HD patients. Analyses of the differences between GMI and DMI indicated that rapid forgetting was more apparent for DAT than for HD patients in the early stages of these disorders. When savings scores for the Logical Memory and Visual Reproduction tests were used to examine retention over a 30-minute period, both mildly and moderately demented DAT patients demonstrated more rapid forgetting than did HD patients with similar levels of cognitive decline. Disciminant analyses performed with these indices of forgetting showed 95 per cent accurate classification of DAT and elderly controls, and 79 per cent correct classification of DAT and HD patients. Assessment of the patients\u27 tendencies to make prior-item intrusion errors on the Visual Reproduction tests of the WMS and WMS-R yielded significant differences between patient groups and the two versions of the test. Patients with DAT made significantly more prior-figure intrusion errors than did HD patients on both versions of the VRT, but the original WMS form of this figural memory test was more likely to elicit such errors than was the revised version. Despite many improvements in the revised scale, a number of limitations still exist including standardization and a lack of norms for elderly individuals, as well as failures to include tests of verbal recognition and adequate measures of nonverbal memory

    Investigation of gate material ductility enables flexible a-IGZO TFTs bendable to a radius of 1.7 mm

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    TFTs on flexible plastic foils have the potential to enable new applications like electronic skins or smart textiles. Due to the temperature sensitivity of plastic substrates, amorphous In-Ga-Zn-O (a-IGZO) is a promising semiconductor since it provides a carrier mobility ≥10 cm2/Vs when deposited at room temperature. Therefore, a-IGZO TFTs have significantly increased electrical performance compared to organic TFTs, but also suffer from a decreased bendability. Here, focused ion beam (FIB) images are used to identify the gate metal as the dominant factor for the formation of cracks in bent a-IGZO TFTs. Flexible a-IGZO TFTs using a high-k Al2O 3 gate dielectric and different gate contact materials (Cr, Pt, Ti, or Cu) exhibit a similar effective mobility μFE, threshold voltage VTH, and on-off current ratio of: ≈15 cm2/Vs, ≈1 V, and ≥109. Simultaneously, bending experiments confirmed that their bendability depends on the ductility of the gate material. These findings are used to identify Cu as suitable gate material, and to fabricate a-IGZO TFTs on free-standing plastic foil which can be operated at a bending radius of 1.7 mm (1.55% strain), whereas bending shifts μFE and VTH only by + 2%, and - 6 mV. © 2013 IEEE

    The diagnostic utility of savings scores: Differentiating Alzheimer\u27s and Huntington\u27s diseases with the logical memory and visual reproduction tests

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    Recent research has demonstrated that patients with dementia of the Alzheimer type (DAT) evidence more rapid forgetting than do patients with Huntington\u27s disease (HD). The present study focused on whether such group differences translated into measures with adequate sensitivity and specificity at different stages of these disorders. It was found that measures of forgetting (i.e., savings scores) based upon the Logical Memory and Visual Reproduction tests of the Wechsler Memory Scale - Revised had satisfactory to excellent sensitivity and specificity in differentiating DAT and HD patients from healthy control subjects. Savings scores also had good sensitivity and specificity in differentiating DAT from HD in the early stages of the diseases. However, unsatisfactory specificity may limit the utility of savings scores in differentiating among patients with moderate DAT and HD
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