25 research outputs found

    Lawson Criterion for Ignition Exceeded in an Inertial Fusion Experiment

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    Lawson criterion for ignition exceeded in an inertial fusion experiment

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    For more than half a century, researchers around the world have been engaged in attempts to achieve fusion ignition as a proof of principle of various fusion concepts. Following the Lawson criterion, an ignited plasma is one where the fusion heating power is high enough to overcome all the physical processes that cool the fusion plasma, creating a positive thermodynamic feedback loop with rapidly increasing temperature. In inertially confined fusion, ignition is a state where the fusion plasma can begin "burn propagation" into surrounding cold fuel, enabling the possibility of high energy gain. While "scientific breakeven" (i.e., unity target gain) has not yet been achieved (here target gain is 0.72, 1.37 MJ of fusion for 1.92 MJ of laser energy), this Letter reports the first controlled fusion experiment, using laser indirect drive, on the National Ignition Facility to produce capsule gain (here 5.8) and reach ignition by nine different formulations of the Lawson criterion

    Americans, Marketers, and the Internet: 1999-2012

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    Proceedings of the 3rd Biennial Conference of the Society for Implementation Research Collaboration (SIRC) 2015: advancing efficient methodologies through community partnerships and team science

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    It is well documented that the majority of adults, children and families in need of evidence-based behavioral health interventionsi do not receive them [1, 2] and that few robust empirically supported methods for implementing evidence-based practices (EBPs) exist. The Society for Implementation Research Collaboration (SIRC) represents a burgeoning effort to advance the innovation and rigor of implementation research and is uniquely focused on bringing together researchers and stakeholders committed to evaluating the implementation of complex evidence-based behavioral health interventions. Through its diverse activities and membership, SIRC aims to foster the promise of implementation research to better serve the behavioral health needs of the population by identifying rigorous, relevant, and efficient strategies that successfully transfer scientific evidence to clinical knowledge for use in real world settings [3]. SIRC began as a National Institute of Mental Health (NIMH)-funded conference series in 2010 (previously titled the “Seattle Implementation Research Conference”; $150,000 USD for 3 conferences in 2011, 2013, and 2015) with the recognition that there were multiple researchers and stakeholdersi working in parallel on innovative implementation science projects in behavioral health, but that formal channels for communicating and collaborating with one another were relatively unavailable. There was a significant need for a forum within which implementation researchers and stakeholders could learn from one another, refine approaches to science and practice, and develop an implementation research agenda using common measures, methods, and research principles to improve both the frequency and quality with which behavioral health treatment implementation is evaluated. SIRC’s membership growth is a testament to this identified need with more than 1000 members from 2011 to the present.ii SIRC’s primary objectives are to: (1) foster communication and collaboration across diverse groups, including implementation researchers, intermediariesi, as well as community stakeholders (SIRC uses the term “EBP champions” for these groups) – and to do so across multiple career levels (e.g., students, early career faculty, established investigators); and (2) enhance and disseminate rigorous measures and methodologies for implementing EBPs and evaluating EBP implementation efforts. These objectives are well aligned with Glasgow and colleagues’ [4] five core tenets deemed critical for advancing implementation science: collaboration, efficiency and speed, rigor and relevance, improved capacity, and cumulative knowledge. SIRC advances these objectives and tenets through in-person conferences, which bring together multidisciplinary implementation researchers and those implementing evidence-based behavioral health interventions in the community to share their work and create professional connections and collaborations

    Betrayal vs. nonbetrayal trauma: Examining the different effects of social support and emotion regulation on PTSD symptom severity.

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    Objective: Betrayal Trauma Theory posits that interpersonal traumas are particularly injurious when the perpetrator is a person that the victim previously trusted and was close to. A relevant protective factor to examine is social support, which may influence PTSD symptomology through its influence on emotion regulation. The aim of the current study was to examine differences in the associations between social support, emotion regulation, and PTSD symptom severity for survivors of betrayal trauma and nonbetrayal trauma. Method: Two hundred and 73 trauma survivors (age: M = 25.96 years, SD = 9.42 years; 80.2% female; 63.7% White) completed the anonymous, online survey. Results: Across both groups, emotion regulation mediated the relationship between social support and PTSD symptom severity. A multiple-samples SEM analysis showed that the betrayal group evidenced a weaker relationship between social support and emotion regulation. Conclusions: Findings suggest that survivors of high betrayal trauma may not engage with their social support in ways that foster emotion regulation skills. Therefore, for high betrayal trauma survivors specifically, group interventions that involve the survivor and close contact(s), may be particularly beneficial in enhancing emotion regulation and decreasing PTSD symptomology. (PsycInfo Database Record (c) 2020 APA, all rights reserved

    Interpersonal emotion regulation in betrayal trauma survivors: A preliminary qualitative exploration

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    Interpersonal trauma, or trauma involving maltreatment by someone that a survivor has a close, personal relationship with (i.e., betrayal trauma), may be particularly predictive of alterations in interpersonal and emotion regulation processes. Social support may facilitate interpersonal emotion regulation (IER) and posttraumatic functioning, though this process may be particularly difficult for survivors of betrayal trauma. The current study includes a sample of female-identifying betrayal trauma survivors with clinically significant PTSD symptomology (N = 70). Thematic analysis was utilized to investigate how these survivors describe their affective experience and the factors that impact their willingness and comfort to engage with others during times of distress. Most participants were able to describe their emotional experiences, but provided brief, simplistic descriptions. Generally, participants reported feeling wary of sharing negative emotions with others due to fear of judgment or being seen as a burden. Findings allow us to better understand how survivors make sense of and differentiate their emotions, and their experienced benefits of or barriers to IER

    Measurement invariance in the assessment of intimate partner abuse among sexual minority and non-sexual minority individuals

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    Research suggests that sexual minorities (SMs) experience a higher risk of IPA than their heterosexual counterparts. The extent of this problem is likely underestimated and not fully understood due to limitations in our assessment of ways IPA uniquely manifests among SMs. Three forms of IPA that have been discussed in the literature are physical aggression, psychological aggression, and controlling behaviors. In the current study, we assessed the measure invariance of the assessment of these forms of IPA between SM and non-SMs. Participants were recruited using Amazon Mechanical Turk Crowdsourcing Platform. We recruited 338 participants between the ages of 18–59 years old. Of those, 47.3% (n = 160) described their sexual orientation as straight/hetero-sexual, 28.1% (n = 95) bisexual, 10.1% (n = 34) gay, 4.7% (n = 16) lesbian, 3.0% (n = 10) as asexual, 3.8% (n = 13) as pansexual, 3.0% (n = 10) as queer. Similar to previous research, fits for the overall model for both SMs and non-SMs were poor. However, measurement weights, structural covariances, and measurement residuals models were all significantly different from the unconstrained model, exhibiting a meaningful difference in assessment of IPA between the two groups. Results suggest that experiences of IPA may not be adequately captured by this measure, particularly for SM individuals. Future research should examine the unique and shared experiences of SM and non-SM IPA survivors

    Symptomatic cardiac metastases of breast cancer 27 years after mastectomy: a case report with literature review - pathophysiology of molecular mechanisms and metastatic pathways, clinical aspects, diagnostic procedures and treatment modalities.

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    Metastases to the heart and pericardium are rare but more common than primary cardiac tumours and are generally associated with a rather poor prognosis. Most cases are clinically silent and are undiagnosed in vivo until the autopsy. We present a female patient with a 27-year-old history of an operated primary breast cancer who was presented with dyspnoea, paroxysmal nocturnal dyspnoea and orthopnoea. The clinical signs and symptoms aroused suspicion of congestive heart failure. However, the cardiac metastases were detected during a routine cardiologic evaluation and confirmed with computed tomography imaging. Additionally, this paper outlines the pathophysiology of molecular and clinical mechanisms involved in the metastatic spreading, clinical presentation, diagnostic procedures and treatment of heart metastases. The present case demonstrates that a complete surgical resection and systemic chemotherapy may result in a favourable outcome for many years. However, a lifelong medical follow-up, with the purpose of a detection of metastases, is highly recommended. We strongly call the attention of clinicians to the fact that during the follow-up of all cancer patients, such heart failure may be a harbinger of the secondary heart involvement
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