Skeletal Light-Scattering Accelerates Bleaching Response in Reef-Building Corals

Background At the forefront of ecosystems adversely affected by climate change, coral reefs are sensitive to anomalously high temperatures which disassociate (bleaching) photosynthetic symbionts (Symbiodinium) from coral hosts and cause increasingly frequent and severe mass mortality events. Susceptibility to bleaching and mortality is variable among corals, and is determined by unknown proportions of environmental history and the synergy of Symbiodinium- and coral-specific properties. Symbiodinium live within host tissues overlaying the coral skeleton, which increases light availability through multiple light-scattering, forming one of the most efficient biological collectors of solar radiation. Light-transport in the upper ~200 μm layer of corals skeletons (measured as ‘microscopic’ reduced-scattering coefficient, μ′S,m), has been identified as a determinant of excess light increase during bleaching and is therefore a potential determinant of the differential rate and severity of bleaching response among coral species. Results Here we experimentally demonstrate (in ten coral species) that, under thermal stress alone or combined thermal and light stress, low-μ′S,m corals bleach at higher rate and severity than high-μ′S,m corals and the Symbiodinium associated with low-μ′S,m corals experience twice the decrease in photochemical efficiency. We further modelled the light absorbed by Symbiodinium due to skeletal-scattering and show that the estimated skeleton-dependent light absorbed by Symbiodinium (per unit of photosynthetic pigment) and the temporal rate of increase in absorbed light during bleaching are several fold higher in low-μ′S,m corals. Conclusions While symbionts associated with low-μ′S,m corals receive less total light from the skeleton, they experience a higher rate of light increase once bleaching is initiated and absorbing bodies are lost; further precipitating the bleaching response. Because microscopic skeletal light-scattering is a robust predictor of light-dependent bleaching among the corals assessed here, this work establishes μ′S,m as one of the key determinants of differential bleaching response

Is being overweight associated with engagement in self-injurious behaviours in adolescence, or do psychological factors have more “weight”?

Introduction The purpose of this study was to examine the prevalence of non-suicidal self-injurious behaviours (NSSI) among healthy weight and overweight adolescents and to examine the role of age, gender, weight status, treatment condition for weight control, and psychological variables (psychopathological symptoms and emotional skills) in the prediction of NSSI. Methods The study had a cross-sectional design, and participants (n = 370) were aged 14-19 years and were divided in three groups: 205 adolescents with normal weight, 82 adolescents from the community with overweight/obesity, and 83 adolescents with overweight/obesity and in outpatient treatment for weight control. Results The prevalence of these behaviours in the overweight community group (25.6 %) and in the overweight clinical group (14.5 %) was similar to their healthy weight peers (19 %). Not attending an outpatient treatment for weight control, higher psychopathology and less ability to regulate emotions predict the presence of NSSI. Conclusion Being overweight is not associated with NSSI, but psychosocial variables such as psychopathology, emotional deregulation and the absence of medical care predict these behaviours.info:eu-repo/semantics/publishedVersio

Joint Audio-Visual Words for Violent Scenes Detection in Movies

International audienceThis paper presents an audio-visual data representation for violent scenes detection in movies. Existing works in this field consider either the audio or the visual information; or their shallow fusion. None has yet explored their joint de- pendence for violent scenes detection. We propose a feature which provides strong multi-modal audio and visual cues by first joining the audio and the visual features and then revealing statistically the joint multi-modal patterns. Ex- perimental validation was conducted in the context of the Violent Scenes Detection task of the MediaEval 2013 Multi- media benchmark. The obtained results show the potential of the proposed approach in comparison to methods using audio and visual features separately and other fusion meth- ods

Zastosowanie potencjometrycznej metody wykrywania pęknięć w procesie renowacji narzędzi kuźniczych

This article deals with renovation of tools for volume forming. It analyzes the current state of the solved problems of renovation of tools for volume forming and possibilities of rationalizations and cost reduction by using non-destructive detection technologies for examination of inside defects.Praca dotyczy renowacji narzędzi do obróbki objętościowej. Prowadzono analizę metod i zagadnień związanych z renowacją narzędzi do kształtowania objętościowego oraz możliwości ich racjonalizacji. Uwzględniono zmniejszenie kosztów przez zastosowanie metod nieniszczących do oceny wad wewnętrznych narzędzi

Pandemic-related racial discrimination and its health impact among non-Indigenous racially minoritized peoples in high-income contexts : a systematic review

This study aims to review articles reporting the perspectives and experiences of pandemic-related discrimination among racially minoritized peoples in high-income contexts. We searched online databases (Medline, EMBASE, PsycINFO, Web of Science, and ProQuest) for peer-reviewed articles published between January 2002 and October 2020. Eligible studies reported either quantitative or qualitative accounts of pandemic-related discrimination from the perspectives of racially minoritized peoples in high-income contexts. Two authors screened 30% of titles/abstracts, and all full-text articles. Each article included for extraction underwent a quality assessment by two reviewers. Data were extracted and categorized thematically using NVivo 12, followed by a secondary analysis informed by critical race theory. Of the 1289 articles screened, 16 articles from five countries met the inclusion criteria. Racial discrimination is heightened during pandemic periods, due to the social association of specific racial groups with pandemic diseases including COVID-19, SARS (Asian), H1N1 (Hispanic) and Ebola (African). Fear based responses to racially minoritized peoples during pandemic periods included verbal/physical abuse, hypersurveillance, and avoidance, often occurring in public spaces. Pandemic-related racism had subsequent impacts on mental health and health care accessibility. Various coping strategies, including community support, avoidance, and problem solving, were documented in response to racial discrimination. Racialized discrimination and violence is a serious threat to the health and wellbeing of racially minoritized peoples, particularly due to its increase during pandemic periods. Racism must be recognized as a public health issue, and efforts to address its increased impact in pandemic contexts should be made, including ensuring that adequate representation of racially minoritized groups is present in policy, planning, and implementation

Design of UWB antenna array for through-wall detection system

In this paper, an ultra-wideband (UWB) antenna array for through-wall microwave imaging (TWMI) system is introduced. The detection system consists of 4-element balanced antipodal Vivaldi antenna array (BAVA) fed by 1-to-4 UWB modified Wilkinson power divider. The antenna element, array, and feed network are optimized, fabricated and tested. The main working principle of the detection system is based on time domain reflectometry (TDR). Wherein, very short pulse generated by the vector network analyzer (VNA) is used to illuminate the wall under investigation through the array system. The exprimental work of scanning a 20 × 20 cm area of two wall separated by 15 cm air gap with the purpose of detecting 4 cm (diameter) metallic ball concealed in a gap between the walls shows a good acuuracy. In order to enhance the resolution of the received image, a special filtering process has been developped and implemented. © 2013 IEEE

Separating Acute Rheumatic Fever from Nonrheumatic Streptococcal Myocarditis

Introduction. Streptococcal pharyngitis has been historically complicated with systemic involvement manifesting as acute rheumatic fever, which is a serious condition that can lead to permanent damage to heart valves. A recent association between streptococcal pharyngitis and nonrheumatic heart disease is emerging in literature. We present a case of nonrheumatic streptococcal myocarditis diagnosed using cardiac MRI. Case Presentation. A 25-year-old male, presented with complaints of sore throat, nonproductive cough, fever, pleuritic chest pain, and progressive dyspnea for four days. The patient had elevated troponins at presentation of 0.47 (ng/L) that peaked at 4.0 (ng/L). ECG showed sinus rhythm and ST elevations in leads V2, V3, V4, and V5. NT-Pro-BNP was 1740. Transthoracic echocardiogram (TTE) showed reduced ejection fraction (EF) of 37% and global hypokinesis. The rapid strep test was positive for group A streptococcus and C-reactive protein was elevated at 161. Cardiac MRI demonstrated an EF of 53% and edema in the anterior wall without delayed gadolinium enhancement. Cardiac catheterization showed normal coronaries. Discussion. According to modified Jones criteria, the patient did not meet the full major or minor criteria to be diagnosed with acute rheumatic fever. The course of the nonrheumatic myocarditis is favorable and includes a full recovery of cardiac function, no involvement of cardiac valves, or long-term use of antibiotics. Conclusion. It is crucial to make a separate distinction between acute rheumatic fever and nonrheumatic myocarditis because this will have huge implications on management and long-term use of antibiotics. Cardiac imaging modalities can aid in distinction between the two disease entities

Management of Patients With Patent Foramen Ovale and Stroke: A National Survey of Interventional Cardiologists and Vascular Neurologists

Background Results from multiple clinical trials support patent foramen ovale closure after cryptogenic stroke in select patients, but it remains unclear how new data and updated professional society guidelines have impacted clinical practice. Here, we aimed to compare how stroke neurologists and interventional cardiologists approach patients with cryptogenic stroke with patent foramen ovale and how critical anatomic and clinical factors influence decision making. Methods and Results An electronic survey was administered to 1556 vascular neurologists and 1057 interventional cardiologists throughout the United States. The survey addressed factors such as patient age, preclosure workup, and postclosure antithrombotics. Clinical vignettes highlighted critical variables and used a 5‐point Likert scale to assess the providers' level of support for closure. There were 491 survey responses received from 301 (of 1556) vascular neurologists and 190 (of 1057) interventional cardiologists, with an overall response rate of 19%. Vascular neurologists were more likely to recommend against closure on the basis of older age (P<0.001). Interventional cardiologists are more supportive of closure across a range of clinical vignettes, including a very carefully selected patient with cryptogenic stroke (P<0.001), a patient with a high‐risk alternative stroke cause (P<0.001), and a range of cases highlighting clinical variables where data are lacking. The majority of interventionalists (88%) seek neurology consultation before pursuing patent foramen ovale closure. Conclusions lnterventional cardiologists are more likely than vascular neurologists to support patent foramen ovale closure across a range of situations. This emphasizes the importance of collaboration and shared decision making, but also reveals an opportunity for professional society educational outreach

Clinicians' Approach to Patent Foramen Ovale Closure after Stroke: Comparing Cardiologists and Neurologists

Background Evidence from randomized trials and updated professional society guidelines supports patent foramen ovale (PFO) closure after cryptogenic stroke in select patients. It is unclear how this has been integrated into real‐world practice, so we aimed to compare practice patterns between cardiologists and neurologists. Methods and Results In March of 2021, a survey of cardiologists and neurologists who work or previously trained at the University of Pennsylvania Health System assessed practice preferences with respect to PFO closure after stroke. Clinical vignettes isolated specific variables of interest and used a 5‐point Likert scale to assess the level of support for PFO closure. Stroke neurologists and interventional cardiologists were compared by Wilcoxon‐Mann–Whitney tests. Secondarily, Kruskal–Wallis tests compared stroke neurologists, general neurologists, interventional cardiologists, and general cardiologists. We received 106 responses from 182 survey recipients (31/31 stroke neurologists, 38/46 interventional cardiologists, 20/30 general neurologists, and 17/77 general cardiologists). A similar proportion of stroke neurologists and interventional cardiologists favored PFO closure in a young patient with cryptogenic stroke, 88% and 87%, respectively (P=0.54). Interventionalists were more likely than stroke neurologists to support closure in the context of an alternative high‐risk stroke mechanism, 14% and 0%, respectively (P=0.003). Stroke neurologists were more likely to oppose closure on the basis of older age (P=0.01). Conclusions There are key differences between how neurologists and cardiologists approach PFO closure after stroke, particularly when interpreting the stroke etiology and when considering closure beyond the scope of prior trials; this underscores the importance of collaboration between cardiologists and neurologists