533 research outputs found
Optimal generation of Fock states in a weakly nonlinear oscillator
We apply optimal control theory to determine the shortest time in which an
energy eigenstate of a weakly anharmonic oscillator can be created under the
practical constraint of linear driving. We show that the optimal pulses are
beatings of mostly the transition frequencies for the transitions up to the
desired state and the next leakage level. The time of a shortest possible pulse
for a given nonlinearity scale with the nonlinearity parameter delta as a power
law of alpha with alpha=-0.73 +/-0.029. This is a qualitative improvement
relative to the value alpha=1 suggested by a simple Landau-Zener argument.Comment: 10 pages, 6 figure
Psychological care, patient education, orthotics, ergonomics and prevention strategies for neck pain: a systematic overview update as part of the ICON project
Objectives: To conduct an overview on psychological interventions, orthoses, patient education, ergonomics, and 1°/2° neck pain prevention for adults with acute-chronic neck pain. Search Strategy: Computerized databases and grey literature were searched (2006-2012).
Selection Criteria: Systematic reviews of randomized controlled trials (RCTs) on pain, function/disability, global perceived effect, quality-of-life and patient satisfaction were retrieved.
Data Collection & Analysis: Two independent authors selected articles, assessed risk of bias using AMSTAR tool and extracted data. The GRADE tool was used to evaluate the body of evidence and an external panel to provide critical review.
Main Results: We retrieved 30 reviews (5-9 AMSTAR score) reporting on 75 RCTs with the following moderate GRADE evidence. For acute whiplash associated disorder (WAD), an education video in emergency rooms (1RCT, 405participants] favoured pain reduction at long-term follow-up thus helping 1 in 23 people [Standard Mean Difference: - 0.44(95%CI: -0.66 to -0.23)). Use of a soft collar (2RCTs, 1278participants) was not beneficial in the long-term. For chronic neck pain, a mind-body intervention (2RCTs, 1 meta-analysis, 191participants) improved short-term pain/function in 1 of 4 or 6 participants. In workers, 2-minutes of daily scapula-thoracic endurance training (1RCT, 127participants) over 10 weeks was beneficial in 1 of 4 participants. A number of psychosocial interventions, workplace interventions, collar use and self-management educational strategies were not beneficial.
Reviewers' Conclusions: Moderate evidence exists for quantifying beneficial and non-beneficial effects of a limited number of interventions for acute WAD and chronic neck pain. Larger trials with more rigorous controls need to target promising interventions
The Sonophotocatalytic Degradation of Pharmaceuticals in Water by MnOx-TiO2 Systems with Tuned Band-Gaps
Advanced oxidation processes (AOPs) are technologies to degrade organic pollutants to carbon dioxide and water with an eco-friendly approach to form reactive hydroxyl radicals.Photocatalysis is an AOP whereby TiO2 is the most adopted photocatalyst. However, TiO2 features a wide (3.2 eV) and fast electron-hole recombination. When Mn is embedded in TiO2, it shifts the absorption wavelength towards the visible region of light, making it active for natural light applications. We present a systematic study of how the textural and optical properties of Mn-doped TiO2 vary with ultrasound applied during synthesis. We varied ultrasound power, pulse length, and power density (by changing the amount of solvent). Ultrasound produced mesoporous MnOx-TiO2 powders with a higher surface area (101\u2013158 m2 g 121), pore volume (0-13\u20130.29 cc g 121), and smaller particle size (4\u201310 \ub5m) than those obtained with a conventional sol-gel method (48\u2013129 m2 g 121, 0.14\u20130.21 cc g 121 , 181 \ub5m, respectively). Surprisingly, the catalysts obtained with ultrasound had a content of brookite that was at least 28%, while the traditional sol-gel samples only had 7%. The samples synthesized with ultrasound had a wider distribution of the band-gaps, in the 1.6\u20131.91 eV range, while traditional ones ranged from 1.72 eV to 1.8 eV. We tested activity in the sonophotocatalytic degradation of two model pollutants (amoxicillin and acetaminophen). The catalysts synthesized with ultrasound were up to 50% more active than the traditional samples
Learned Visual Features to Textual Explanations
Interpreting the learned features of vision models has posed a longstanding
challenge in the field of machine learning. To address this issue, we propose a
novel method that leverages the capabilities of large language models (LLMs) to
interpret the learned features of pre-trained image classifiers. Our method,
called TExplain, tackles this task by training a neural network to establish a
connection between the feature space of image classifiers and LLMs. Then,
during inference, our approach generates a vast number of sentences to explain
the features learned by the classifier for a given image. These sentences are
then used to extract the most frequent words, providing a comprehensive
understanding of the learned features and patterns within the classifier. Our
method, for the first time, utilizes these frequent words corresponding to a
visual representation to provide insights into the decision-making process of
the independently trained classifier, enabling the detection of spurious
correlations, biases, and a deeper comprehension of its behavior. To validate
the effectiveness of our approach, we conduct experiments on diverse datasets,
including ImageNet-9L and Waterbirds. The results demonstrate the potential of
our method to enhance the interpretability and robustness of image classifiers
The patient safety practices of emergency medical teams in disaster zones: a systematic analysis
Introduction: Disaster zone medical relief has been criticised for poor quality care, lack of standardisation and accountability. Traditional patient safety practices of Emergency Medical Teams (EMT) in disaster zones were not well understood. Improving the quality of healthcare in disaster zones has gained importance within global health policy. Ascertaining patient safety practices of EMTs in disaster zones may identify areas of practice that can be improved. Methods: A systematic search of OvidSP, Embase and Medline databases, key journals of interest, key grey-literature texts, the databases of the World Health Organisation (WHO), Médecins Sans Frontieres (MSF) and the International Committee of the Red Cross (ICRC), and Google Scholar were performed. Descriptive studies, case reports, case series, prospective trials and opinion pieces were included with no limitation on date or language of publication. Results: There were 9,685 records, evenly distributed between the peer-reviewed and grey literature. Of these, 30 studies and 9 grey literature texts met the inclusion criteria and underwent qualitative synthesis. From these articles, 302 patient safety statements were extracted. Thematic analysis categorised these statements into 84 themes (total frequency 632). The most frequent themes were limb injury (9%), medical records (5.4%), surgery decision making (4.6%), medicines safety (4.4%) and protocol (4.4%) Conclusion: Patient safety practices of EMTs in disaster zones are weighted towards acute clinical care, particularly surgery. The management of Non-Communicable Disease (NCD) is underrepresented. There is widespread recognition of the need to improve medical record keeping. High-quality data and institutional level patient safety practices are lacking. There is no consensus on disaster zone specific performance indicators. These deficiencies represent opportunities to improve patient safety in disaster zones
Comparison effect of oral propranolol and oxytocin versus oxytocin only on induction of labour in nulliparous women (a double blind randomized trial)
BACKGROUND AND AIM: Today, research on new methods for preventing caesarean sections owing to labour induction, have been requested in obstetric practice, because of the increased morbidity related to caesarean section. Therefore, the aim of this study was to compare the effect of Oral Propranolol and Oxytocin versus Oxytocin only on induction of labour in nulliparous women. MATERIAL AND METHODS: A double blind randomized controlled trial was performed at the Ilam Mostafa Hospital, Ilam, Iran, from March 2010 to March 2011 on 146 nulliparous pregnant women who had gestational age of 40-42 weeks of pregnancy and a Bishop score of .05) DISCUSSION AND CONCLUSION: Our study showed that oral Propranolol was effective for labour induction and that it could decrease the frequency of caesarean deliveries without producing any adverse effects on mothers or neonates
Davidson on Self‐Knowledge: A Transcendental Explanation
Davidson has attempted to offer his own solution to the problem of self-knowledge, but there has been no consensus between his commentators on what this solution is. Many have claimed that Davidson’s account stems from his remarks on disquotational specifications of self-ascriptions of meaning and mental content, the account which I will call the “Disquotational Explanation”. It has also been claimed that Davidson’s account rather rests on his version of content externalism, which I will call the “Externalist Explanation”. I will argue that not only are these explanations of self-knowledge implausible, but Davidson himself has already rejected them. Thus, neither can be attributed to Davidson as his suggested account of self-knowledge. I will then introduce and support what I take to be Davidson’s official and independent account of self-knowledge, that is, his “Transcendental Explanation”. I will defend this view against certain potential objections and finally against the objections made by William Child
An update of the Worldwide Integrated Assessment (WIA) on systemic insecticides. Part 2: impacts on organisms and ecosystems
New information on the lethal and sublethal effects of neonicotinoids and fipronil on organisms is presented in this review, complementing the previous WIA in 2015. The high toxicity of these systemic insecticides to invertebrates has been confirmed and expanded to include more species and compounds. Most of the recent research has focused on bees and the sublethal and ecological impacts these insecticides have on pollinators. Toxic effects on other invertebrate taxa also covered predatory and parasitoid natural enemies and aquatic arthropods. Little, while not much new information has been gathered on soil organisms. The impact on marine coastal ecosystems is still largely uncharted. The chronic lethality of neonicotinoids to insects and crustaceans, and the strengthened evidence that these chemicals also impair the immune system and reproduction, highlights the dangers of this particular insecticidal classneonicotinoids and fipronil. , withContinued large scale – mostly prophylactic – use of these persistent organochlorine pesticides has the potential to greatly decreasecompletely eliminate populations of arthropods in both terrestrial and aquatic environments. Sublethal effects on fish, reptiles, frogs, birds and mammals are also reported, showing a better understanding of the mechanisms of toxicity of these insecticides in vertebrates, and their deleterious impacts on growth, reproduction and neurobehaviour of most of the species tested. This review concludes with a summary of impacts on the ecosystem services and functioning, particularly on pollination, soil biota and aquatic invertebrate communities, thus reinforcing the previous WIA conclusions (van der Sluijs et al. 2015)
The impact of intellectual disabilities on elite sports performance
Athletes with intellectual disabilities (ID) were re-introduced into the Paralympics in London 2012. As part of this development a classification system had to be established evidencing the impact this impairment has on elite sports performance. This review examines the research behind this issue. Firstly it examines the limited literature comparing the standards reached by top-level athletes with ID with those without disabilities, and then moves on to look at the research demonstrating differences in both the cognitive and physical skills needed for elite performance. The article then reviews the factors that may be implicated to account for this disparity, from a range of perspectives. A case is made for the importance of looking at this area in terms of the potential for the transferability of research findings from this group to talent identification in mainstream athletes and the benefits of integrating neuropsychological concepts and approaches to understanding the cognitive components behind the development of particular skills associated with high-level performance in specific sports
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