724 research outputs found
Do adults with high functioning autism or Asperger Syndrome differ in empathy and emotion recognition?
The present study examined whether adults with high functioning autism (HFA) showed greater difficulties in (i) their self-reported ability to empathise with others and/or (ii) their ability to read mental states in others’ eyes than adults with Asperger syndrome (AS). The Empathy Quotient (EQ) and ‘Reading the Mind in the Eyes’ Test (Eyes Test) were compared in 43 adults with AS and 43 adults with HFA. No significant difference was observed on EQ score between groups, while adults with AS performed significantly better on the Eyes Test than those with HFA. This suggests that adults with HFA may need more support, particularly in mentalizing and complex emotion recognition, and raises questions about the existence of subgroups within autism spectrum conditions
Growth characteristics in individuals with osteogenesis imperfecta in North America: results from a multicenter study.
PurposeOsteogenesis imperfecta (OI) predisposes people to recurrent fractures, bone deformities, and short stature. There is a lack of large-scale systematic studies that have investigated growth parameters in OI.MethodsUsing data from the Linked Clinical Research Centers, we compared height, growth velocity, weight, and body mass index (BMI) in 552 individuals with OI. Height, weight, and BMI were plotted on Centers for Disease Control and Prevention normative curves.ResultsIn children, the median z-scores for height in OI types I, III, and IV were -0.66, -6.91, and -2.79, respectively. Growth velocity was diminished in OI types III and IV. The median z-score for weight in children with OI type III was -4.55. The median z-scores for BMI in children with OI types I, III, and IV were 0.10, 0.91, and 0.67, respectively. Generalized linear model analyses demonstrated that the height z-score was positively correlated with the severity of the OI subtype (P < 0.001), age, bisphosphonate use, and rodding (P < 0.05).ConclusionFrom the largest cohort of individuals with OI, we provide median values for height, weight, and BMI z-scores that can aid the evaluation of overall growth in the clinic setting. This study is an important first step in the generation of OI-specific growth curves
Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at s√=8 TeV with the ATLAS detector
The results of a search for direct pair production of the scalar partner to the top quark using an integrated luminosity of 20.1fb−1 of proton–proton collision data at √s = 8 TeV recorded with the ATLAS detector at the LHC are reported. The top squark is assumed to decay via t˜→tχ˜01 or t˜→ bχ˜±1 →bW(∗)χ˜01 , where χ˜01 (χ˜±1 ) denotes the lightest neutralino (chargino) in supersymmetric models. The search targets a fully-hadronic final state in events with four or more jets and large missing transverse momentum. No significant excess over the Standard Model background prediction is observed, and exclusion limits are reported in terms of the top squark and neutralino masses and as a function of the branching fraction of t˜ → tχ˜01 . For a branching fraction of 100%, top squark masses in the range 270–645 GeV are excluded for χ˜01 masses below 30 GeV. For a branching fraction of 50% to either t˜ → tχ˜01 or t˜ → bχ˜±1 , and assuming the χ˜±1 mass to be twice the χ˜01 mass, top squark masses in the range 250–550 GeV are excluded for χ˜01 masses below 60 GeV
Observation of associated near-side and away-side long-range correlations in √sNN=5.02 TeV proton-lead collisions with the ATLAS detector
Two-particle correlations in relative azimuthal angle (Δϕ) and pseudorapidity (Δη) are measured in √sNN=5.02 TeV p+Pb collisions using the ATLAS detector at the LHC. The measurements are performed using approximately 1 μb-1 of data as a function of transverse momentum (pT) and the transverse energy (ΣETPb) summed over 3.1<η<4.9 in the direction of the Pb beam. The correlation function, constructed from charged particles, exhibits a long-range (2<|Δη|<5) “near-side” (Δϕ∼0) correlation that grows rapidly with increasing ΣETPb. A long-range “away-side” (Δϕ∼π) correlation, obtained by subtracting the expected contributions from recoiling dijets and other sources estimated using events with small ΣETPb, is found to match the near-side correlation in magnitude, shape (in Δη and Δϕ) and ΣETPb dependence. The resultant Δϕ correlation is approximately symmetric about π/2, and is consistent with a dominant cos2Δϕ modulation for all ΣETPb ranges and particle pT
Multi-split configuration design for fluid-based thermal management systems
High power density systems require efficient cooling to maintain their
thermal performance. Despite this, as systems get larger and more complex,
human practice and insight may not suffice to determine the desired thermal
management system designs. To this end, a framework for automatic architecture
exploration is presented in this article for a class of single-phase,
multi-split cooling systems. For this class of systems, heat generation devices
are clustered based on their spatial information, and flow-split are added only
when required and at the location of heat devices. To generate different
architectures, candidate architectures are represented as graphs. From these
graphs, dynamic physics models are created automatically using a graph-based
thermal modeling framework. Then, an optimal fluid flow distribution problem is
solved by addressing temperature constraints in the presence of exogenous heat
loads to achieve optimal performance. The focus in this work is on the design
of general multi-split heat management systems. The architectures discussed
here can be used for various applications in the domain of configuration
design. The multi-split algorithm can produce configurations where splitting
can occur at any of the vertices. The results presented include 3 categories of
cases and are discussed in detail.Comment: 11 pages, 18 figure
Extracting Design Knowledge from Optimization Data: Enhancing Engineering Design in Fluid Based Thermal Management Systems
As mechanical systems become more complex and technological advances
accelerate, the traditional reliance on heritage designs for engineering
endeavors is being diminished in its effectiveness. Considering the dynamic
nature of the design industry where new challenges are continually emerging,
alternative sources of knowledge need to be sought to guide future design
efforts. One promising avenue lies in the analysis of design optimization data,
which has the potential to offer valuable insights and overcome the limitations
of heritage designs. This paper presents a step toward extracting knowledge
from optimization data in multi-split fluid-based thermal management systems
using different classification machine learning methods, so that designers can
use it to guide decisions in future design efforts. This approach offers
several advantages over traditional design heritage methods, including
applicability in cases where there is no design heritage and the ability to
derive optimal designs. We showcase our framework through four case studies
with varying levels of complexity. These studies demonstrate its effectiveness
in enhancing the design of complex thermal management systems. Our results show
that the knowledge extracted from the configuration design optimization data
provides a good basis for more general design of complex thermal management
systems. It is shown that the objective value of the estimated optimal
configuration closely approximates the true optimal configuration with less
than 1 percent error, achieved using basic features based on the system heat
loads without involving the corresponding optimal open loop control (OLOC)
features. This eliminates the need to solve the OLOC problem, leading to
reduced computation costs.Comment: 13 pages, 20 figure
Advancing Fluid-Based Thermal Management Systems Design: Leveraging Graph Neural Networks for Graph Regression and Efficient Enumeration Reduction
In this research, we developed a graph-based framework to represent various
aspects of optimal thermal management system design, with the aim of rapidly
and efficiently identifying optimal design candidates. Initially, the
graph-based framework is utilized to generate diverse thermal management system
architectures. The dynamics of these system architectures are modeled under
various loading conditions, and an open-loop optimal controller is employed to
determine each system's optimal performance. These modeled cases constitute the
dataset, with the corresponding optimal performance values serving as the
labels for the data. In the subsequent step, a Graph Neural Network (GNN) model
is trained on 30% of the labeled data to predict the systems' performance,
effectively addressing a regression problem. Utilizing this trained model, we
estimate the performance values for the remaining 70% of the data, which serves
as the test set. In the third step, the predicted performance values are
employed to rank the test data, facilitating prioritized evaluation of the
design scenarios. Specifically, a small subset of the test data with the
highest estimated ranks undergoes evaluation via the open-loop optimal control
solver. This targeted approach concentrates on evaluating higher-ranked designs
identified by the GNN, replacing the exhaustive search (enumeration-based) of
all design cases. The results demonstrate a significant average reduction of
over 92% in the number of system dynamic modeling and optimal control analyses
required to identify optimal design scenarios.Comment: 13 pages, 17 figure
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Mechanisms of decadal variability in the Labrador Sea and the wider North Atlantic in a high-resolution climate model
A necessary step before assessing the performance of decadal predictions is the evaluation of the processes that bring memory to the climate system, both in climate models and observations. These mechanisms are particularly relevant in the North Atlantic, where the ocean circulation, related to both the Subpolar Gyre and the Meridional Overturning Circulation (AMOC), is thought to be important for driving significant heat content anomalies. Recently, a rapid decline in observed densities in the deep Labrador Sea has pointed to an ongoing slowdown of the AMOC strength taking place since the mid 90s, a decline also hinted by in-situ observations from the RAPID array.
This study explores the use of Labrador Sea densities as a precursor of the ocean circulation changes, by analysing a 300-year long simulation with the state-of-the-art coupled model HadGEM3-GC2. The major drivers of Labrador Sea density variability are investigated, and are characterised by three major contributions. First, the integrated effect of local surface heat fluxes, mainly driven by year-to-year changes in the North Atlantic Oscillation, which accounts for 62% of the total variance. Additionally, two multidecadal-to-centennial contributions from the Greenland-Scotland Ridge outflows are quantified; the first associated with freshwater exports via the East Greenland Current, and the second with density changes in the Denmark Strait Overflow. Finally, evidence is shown that decadal trends in Labrador Sea densities are followed by important atmospheric impacts. In particular, a negative winter NAO response appears to follow the positive Labrador Sea density trends, and provides a phase reversal mechanism
Uneven focal shoe deterioration in Tourette syndrome.
A 31-year-old single man (AB) sought neuropsychiatric consultation for treatment-resistant motor and vocal tics. He described himself expressing a total of 24 different tics, mainly facial twitches (eye blinking, raising eyebrows, mouth opening, lips licking, stereotyped grimacing) and inappropriate utterances (grunting, throat clearing, sniffing), since the age of 7. There appeared to be no family history of tic disorder. He reported occasional utterance of swear words in contextually inappropriate situations (coprolalia), and the urge to copy other people’s movements (echopraxia). Other tic-associated symptoms included self-injurious behaviours and forced touching of objects. A.B. met both DSM-IV-tr and ICD-10 criteria for Tourette syndrome, and also DSM-IV-tr criteria for attention deficit hyperactivity disorder (combined type) in childhood
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