356 research outputs found
Sneutrino Higgs models explain lepton non-universality in CMS excesses
Recent searches for first-generation leptoquarks and heavy right-handed
bosons have seen excesses in final states with electrons and jets. A bizarre
property of these excesses is that they appear to violate lepton universality.
With these results in mind, we study the phenomenology of supersymmetric models
in which the Higgs arises as the sneutrino in an electron supermultiplet. Since
the electron is singled out in this approach, one can naturally account for the
lepton flavor structure of the excesses. In this work, we show that in such a
framework, one can significantly alleviate the tension between the Standard
Model and the data and yet evade current constraints from other searches.
Lastly we point out that correlated excesses are expected to be seen in future
multilepton searches.Comment: 17 pages, 7 figure
Probing a slepton Higgs on all frontiers
We study several aspects of supersymmetric models with a symmetry
where the Higgs doublet is identified with the superpartner of a lepton. We
derive new, stronger bounds on the gaugino masses based on current
measurements, and also propose ways to probe the model up to scales of
at future colliders. Since the
symmetry cannot be exact, we analyze the effects of -symmetry
breaking on neutrino masses and proton decay. In particular, we find that
getting the neutrino mixing angles to agree with experiments in a minimal model
requires a UV cutoff for the theory at around .Comment: 33 pages, 5 figures; v2: added reference. Matches version published
in JHE
Building high-level features using large scale unsupervised learning
We consider the problem of building high-level, class-specific feature
detectors from only unlabeled data. For example, is it possible to learn a face
detector using only unlabeled images? To answer this, we train a 9-layered
locally connected sparse autoencoder with pooling and local contrast
normalization on a large dataset of images (the model has 1 billion
connections, the dataset has 10 million 200x200 pixel images downloaded from
the Internet). We train this network using model parallelism and asynchronous
SGD on a cluster with 1,000 machines (16,000 cores) for three days. Contrary to
what appears to be a widely-held intuition, our experimental results reveal
that it is possible to train a face detector without having to label images as
containing a face or not. Control experiments show that this feature detector
is robust not only to translation but also to scaling and out-of-plane
rotation. We also find that the same network is sensitive to other high-level
concepts such as cat faces and human bodies. Starting with these learned
features, we trained our network to obtain 15.8% accuracy in recognizing 20,000
object categories from ImageNet, a leap of 70% relative improvement over the
previous state-of-the-art
Luciferase expression and bioluminescence does not affect tumor cell growth in vitro or in vivo
Live animal imaging is becoming an increasingly common technique for accurate and quantitative assessment of tumor burden over time. Bioluminescence imaging systems rely on a bioluminescent signal from tumor cells, typically generated from expression of the firefly luciferase gene. However, previous reports have suggested that either a high level of luciferase or the resultant light reaction produced upon addition of D-luciferin substrate can have a negative influence on tumor cell growth. To address this issue, we designed an expression vector that allows simultaneous fluorescence and luminescence imaging. Using fluorescence activated cell sorting (FACS), we generated clonal cell populations from a human breast cancer (MCF-7) and a mouse melanoma (B16-F10) cell line that stably expressed different levels of luciferase. We then compared the growth capabilities of these clones in vitro by MTT proliferation assay and in vivo by bioluminescence imaging of tumor growth in live mice. Surprisingly, we found that neither the amount of luciferase nor biophotonic activity was sufficient to inhibit tumor cell growth, in vitro or in vivo. These results suggest that luciferase toxicity is not a necessary consideration when designing bioluminescence experiments, and therefore our approach can be used to rapidly generate high levels of luciferase expression for sensitive imaging experiments
De la compĂ©tence Ă lâempathie : Ă©valuation de lâĂ©volution de la perception quâont les Ă©tudiants en mĂ©decine des chirurgiens dans le cadre dâun programme associant le patient comme enseignant et la rĂ©flexion basĂ©e sur les arts
Introduction: The purpose of this study was to identify whether the incorporation of a combined Patient as teacher (PAT) and arts-based reflection (ABR) program during a surgical clerkship rotation could influence more humanistic perceptions of surgeons, using an innovative evaluation approach.
Methods: A novel, single question evaluation tool was created. Third year medical-students were asked to âlist the top 5 attributes of a surgeon, in order of perceived importanceâ both before and after their surgical clerkship rotations and participation in the PAT/ABR program. Attributes identified by students were coded as either âhumanisticâ or ânon-humanistic,â which were then analyzed using generalized linear regression models under a Bayesian framework.
Results: After participation in the PAT/ABR program, the predicted probability of students ranking a humanistic characteristic as the most important attribute of a surgeon had increased by 17%, and the predicted probability of students ranking a humanistic characteristic amongst their top three attributes for a surgeon had increased by 21%.
Conclusion: This innovative evaluative method suggested the success of a combined PAT/ABR program in encouraging a humanistic perspective of surgery and this approach could potentially be explored to evaluate other humanistic education initiatives.Résumé
Introduction : Lâobjectif de cette Ă©tude Ă©tait de dĂ©terminer si lâintroduction dâune nouvelle approche dâĂ©valuation associant la participation de Patients comme enseignants (PCE) Ă une RĂ©flexion basĂ©e sur les arts (RBA) dans un stage dâexternat en chirurgie permettait de mieux percevoir les qualitĂ©s humanistes chez les chirurgiens.
MĂ©thodes : Un nouvel outil dâĂ©valuation Ă question unique a Ă©tĂ© crĂ©Ă©. Des Ă©tudiants en troisiĂšme annĂ©e de mĂ©decine ont Ă©tĂ© invitĂ©s Ă ââĂ©numĂ©rer les cinq principaux attributs dâun chirurgien, par ordre dâimportance perçueââ, avant et aprĂšs leur stage dâexternat en chirurgie et le programme PCE/RBA. Les attributs identifiĂ©s par les Ă©tudiants ont Ă©tĂ© codĂ©s comme «âhumanistesâ» ou «ânon humanistesâ», puis analysĂ©s Ă lâaide de modĂšles de rĂ©gression linĂ©aire gĂ©nĂ©ralisĂ©e dans un cadre bayĂ©sien.
RĂ©sultats : AprĂšs leur participation au programme PCE/RBA, la probabilitĂ© prĂ©dite moyenne que les Ă©tudiants classent un trait humaniste comme lâattribut le plus important dâun chirurgien a augmentĂ© de 17 %, et la probabilitĂ© prĂ©dite que les Ă©tudiants classent un trait humaniste parmi les trois premiers attributs dâun chirurgien a augmentĂ© de 21 %.
Conclusion : Cette mĂ©thode dâĂ©valuation innovante porte Ă croire que le programme PCE/RBA rĂ©ussit en effet Ă favoriser une vision humaniste de la chirurgie. Cette approche peut ĂȘtre explorĂ©e pour Ă©valuer dâautres activitĂ©s de formation axĂ©es sur lâhumanisme
An Empirical Evaluation of Deep Learning on Highway Driving
Numerous groups have applied a variety of deep learning techniques to
computer vision problems in highway perception scenarios. In this paper, we
presented a number of empirical evaluations of recent deep learning advances.
Computer vision, combined with deep learning, has the potential to bring about
a relatively inexpensive, robust solution to autonomous driving. To prepare
deep learning for industry uptake and practical applications, neural networks
will require large data sets that represent all possible driving environments
and scenarios. We collect a large data set of highway data and apply deep
learning and computer vision algorithms to problems such as car and lane
detection. We show how existing convolutional neural networks (CNNs) can be
used to perform lane and vehicle detection while running at frame rates
required for a real-time system. Our results lend credence to the hypothesis
that deep learning holds promise for autonomous driving.Comment: Added a video for lane detectio
Assessing Needs and Outcomes of Children and Youth Receiving Intensive Services
This study investigated whether children/youth in Ontario triaged to residential services showed a higher intensity of need than those referred to outpatient services, and whether residential treatment gains were sufficient for transition to community services. Participants included 2053 children/youth assessed at 23 diverse mental health agencies across Ontario using the interRAIâą Child and Youth Mental Health (ChYMH) instrument. Various presenting problems were examined utilizing scales including: Disruptive/Aggressive Behavior, Hyperactive/Distraction, Social Disengagement, Anxiety, and Sleep Difficulties. Analyses were conducted separately for boys and girls. Notable differences were found in the initial assessment, with residential boys scoring higher on all scales than outpatient boys, and residential girls scoring higher on the externalizing scales (Disruptive/Aggressive Behavior, Hyperactive/Distraction) than outpatient girls. Treatment gains at residential discharge included improvements in Anxiety, Social Disengagement, Hyperactive/Distraction and Sleep Difficulties for boys and girls to levels at or below the initial scores of outpatient peers. Disruptive/Aggressive Behavior is still a high need following residential services. The results highlight differences in severity of mental health presentation between children/youth receiving residential and outpatient services, and how multiple agencies in Ontario are providing services that successfully reduce the severity of mental health needs
Current Approaches to the Treatment of Early Hepatocellular Carcinoma
Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/139902/1/onco0034.pd
NAIL: An evolutionarily conserved lncRNA essential for licensing coordinated activation of p38 and NFÎșB in colitis
Akıncılar SC, Wu L, NG QF, et al., NAIL: an evolutionarily conserved lncRNA essential for licensing coordinated activation of p38 and NFÎșB in colitis. Gut Published Online First: 25 November 2020. doi: 10.1136/gutjnl-2020-32298
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