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https://www.readbyqxmd.com/read/27920390/life-history-trade-offs-the-intensity-of-competition-and-coexistence-in-novel-and-evolving-communities-under-climate-change
#1
Lesley T Lancaster, Gavin Morrison, Robert N Fitt
The consequences of climate change for local biodiversity are little understood in process or mechanism, but these changes are likely to reflect both changing regional species pools and changing competitive interactions. Previous empirical work largely supports the idea that competition will intensify under climate change, promoting competitive exclusions and local extinctions, while theory and conceptual work indicate that relaxed competition may in fact buffer communities from biodiversity losses that are typically witnessed at broader spatial scales...
January 19, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/27919750/mapping-the-functional-connectome-in-traumatic-brain-injury-what-can-graph-metrics-tell-us
#2
Karen Caeyenberghs, Helena Verhelst, Adam Clemente, Peter H Wilson
OBJECTIVE: Traumatic brain injury (TBI) is associated with cognitive and motor deficits, and poses a significant personal, societal, and economic burden. One mechanism by which TBI is thought to affect cognition and behaviour is through changes in functional connectivity. Graph theory is a powerful framework for quantifying topological features of neuroimaging-derived functional networks. The objective of this paper is to review studies examining functional connectivity in TBI with an emphasis on graph theoretical analysis that is proving to be valuable in uncovering network abnormalities in this condition...
December 2, 2016: NeuroImage
https://www.readbyqxmd.com/read/27917586/a-qualitative-perspectival-review-of-the-australian-and-new-zealand-urology-education-and-training-program
#3
Prem Rashid
INTRODUCTION: The Australian and New Zealand (ANZ) urology training program was assessed via a prospective, qualitative review to explore the challenges facing the delivery of high quality urological training now and into the future. AIM: To report the reflective considerations and opinions of leaders in the ANZ urological surgical training program. METHODS: Ethics approved semi-structured, template-based, qualitative interview techniques were employed to evaluate key aspects of the current urology training program...
December 5, 2016: BJU International
https://www.readbyqxmd.com/read/27916689/the-moderating-influence-of-heart-rate-variability-on-stressor-elicited-change-in-pupillary-and-attentional-indices-of-emotional-processing-an-eye-tracking-study
#4
Richard J Macatee, Brian J Albanese, Norman B Schmidt, Jesse R Cougle
Low resting heart rate variability (HRV) is associated with a broad array of negative psychosocial outcomes. Recent theoretical explications of HRV suggest it is an autonomic marker of emotion regulation capacity, but limited research has examined its relationship with emotional information processing indices. The present study utilized eye-tracking methodology to test HRV's theorized role as a marker of emotion regulation capacity in a non-clinical sample. Attentional biases towards threatening, dysphoric, and positive emotional information as well as affective modulation of pupil size were assessed before and after a stress induction...
December 1, 2016: Biological Psychology
https://www.readbyqxmd.com/read/27911537/porosity-governs-normal-stresses-in-polymer-gels
#5
Henri C G de Cagny, Bart E Vos, Mahsa Vahabi, Nicholas A Kurniawan, Masao Doi, Gijsje H Koenderink, F C MacKintosh, Daniel Bonn
When sheared, most elastic solids including metals, rubbers, and polymer gels dilate perpendicularly to the shear plane. This behavior, known as the Poynting effect, is characterized by a positive normal stress. Surprisingly, fibrous biopolymer gels exhibit a negative normal stress under shear. Here we show that this anomalous behavior originates from the open-network structure of biopolymer gels. Using fibrin networks with a controllable pore size as a model system, we show that the normal-stress response to an applied shear is positive at short times, but decreases to negative values with a characteristic time scale set by pore size...
November 18, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27909404/prefrontal-cortex-activity-is-associated-with-biobehavioral-components-of-the-stress-response
#6
Muriah D Wheelock, Nathaniel G Harnett, Kimberly H Wood, Tyler R Orem, Douglas A Granger, Sylvie Mrug, David C Knight
Contemporary theory suggests that prefrontal cortex (PFC) function is associated with individual variability in the psychobiology of the stress response. Advancing our understanding of this complex biobehavioral pathway has potential to provide insight into processes that determine individual differences in stress susceptibility. The present study used functional magnetic resonance imaging to examine brain activity during a variation of the Montreal Imaging Stress Task (MIST) in 53 young adults. Salivary cortisol was assessed as an index of the stress response, trait anxiety was assessed as an index of an individual's disposition toward negative affectivity, and self-reported stress was assessed as an index of an individual's subjective psychological experience...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/27908040/modeling-and-design-of-two-dimensional-membrane-type-active-acoustic-metamaterials-with-tunable-anisotropic-density
#7
Ahmed Allam, Adel Elsabbagh, Wael Akl
A two-dimensional active acoustic metamaterial with controllable anisotropic density is introduced. The material consists of composite lead-lead zirconate titanate plates clamped to an aluminum structure with air as the background fluid. The effective anisotropic density of the material is controlled, independently for two orthogonal directions, by means of an external static electric voltage signal. The material is used in the construction of a reconfigurable waveguide capable of controlling the direction of the acoustic waves propagating through it...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27906119/degrading-traumatic-memories-with-eye-movements-a-pilot-functional-mri-study-in-ptsd
#8
Kathleen Thomaes, Iris M Engelhard, Marit Sijbrandij, Danielle C Cath, Odile A Van den Heuvel
BACKGROUND: Eye movement desensitization and reprocessing (EMDR) is an effective treatment for posttraumatic stress disorder (PTSD). During EMDR, the patient recalls traumatic memories while making eye movements (EMs). Making EMs during recall is associated with decreased vividness and emotionality of traumatic memories, but the underlying mechanism has been unclear. Recent studies support a "working-memory" (WM) theory, which states that the two tasks (recall and EMs) compete for limited capacity of WM resources...
2016: European Journal of Psychotraumatology
https://www.readbyqxmd.com/read/27905904/evaluating-the-implementation-process-of-a-participatory-organizational-level-occupational-health-intervention-in-schools
#9
Roosmarijn M C Schelvis, Noortje M Wiezer, Birgitte M Blatter, Joost A G M van Genabeek, Karen M Oude Hengel, Ernst T Bohlmeijer, Allard J van der Beek
BACKGROUND: The importance of process evaluations in examining how and why interventions are (un) successful is increasingly recognized. Process evaluations mainly studied the implementation process and the quality of the implementation (fidelity). However, in adopting this approach for participatory organizational level occupational health interventions, important aspects such as context and participants perceptions are missing. Our objective was to systematically describe the implementation process of a participatory organizational level occupational health intervention aimed at reducing work stress and increasing vitality in two schools by applying a framework that covers aspects of the intervention and its implementation as well as the context and participants perceptions...
December 1, 2016: BMC Public Health
https://www.readbyqxmd.com/read/27898872/the-effect-of-oxidative-stress-during-exercise-in-the-horse
#10
C A Williams
Oxidative stress is an imbalance of the oxidant-to-antioxidant ratio in the body. Increases in oxidative stress and changes in antioxidant status have been shown during endurance and intense exercise and eventing competition in horses. Antioxidants include vitamins, minerals, enzymes, and proteins that must be synthesized in the body or obtained from the diet. Therefore, exercise level and diet are both factors that play a role in influencing the oxidative stress and antioxidant status of the equine athlete...
October 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27895485/adhd-and-present-hedonism-time-perspective-as-a-potential-diagnostic-and-therapeutic-tool
#11
REVIEW
S Weissenberger, M Klicperova-Baker, P Zimbardo, K Schonova, D Akotia, J Kostal, M Goetz, J Raboch, R Ptacek
The article draws primarily from the behavioral findings (mainly psychiatric and psychological observations) and points out the important relationships between attention-deficit/hyperactivity disorder (ADHD) symptoms and time orientation. Specifically, the authors argue that there is a significant overlap between the symptoms of ADHD and Present Hedonism. Present Hedonism is defined by Zimbardo's time perspective theory and assessed by Zimbardo Time Perspective Inventory. Developmental data on Present Hedonism of males and females in the Czech population sample (N=2201) are also presented...
2016: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/27895102/delaying-and-seeking-care-for-obstructive-sleep-apnea-the-role-of-gender-family-and-morality
#12
Dana Zarhin
Social scientists have proposed various theories as to when, why, and how people come to seek medical care for multiple conditions. Yet, there is still little empirical research to illustrate the pathways into and out of care, especially for chronic illness. This article contributes to this body of work by exploring individuals' reasons for delaying and seeking care for obstructive sleep apnea, which despite being the most diagnosed sleep disorder, has been largely neglected by social scientists. Drawing upon in-depth interviews with 65 Jewish-Israeli obstructive sleep apnea patients, this study shows how intersections of gender, family, and morality shape and are shaped by care-seeking behavior...
November 28, 2016: Health (London)
https://www.readbyqxmd.com/read/27893529/the-role-of-theory-specific-techniques-and-therapeutic-alliance-in-promoting-positive-outcomes-integrative-psychotherapy-for-world-trade-center-responders
#13
Peter Tejas Haugen, Aditi Sinha Werth, Alyce Lauren Foster, Jesse Owen
World Trade Center responders demonstrate high symptom burden, underscoring the importance of refining treatment approaches for this cohort. One method is examining the impact of therapy techniques on outcomes, and the interactions between technique and alliance on outcomes. This study a) examined the interaction of early treatment techniques on integrative psychotherapy outcomes and b) explored whether associations differed at varying levels of alliance. Twenty-nine adult responders diagnosed with partial or full posttraumatic stress disorder received outpatient psychotherapy and completed weekly measures of alliance, technique, and symptom distress...
December 2016: Journal of Nervous and Mental Disease
https://www.readbyqxmd.com/read/27893502/implementing-a-4c-approach-to-quality-improvement
#14
Michelle McGonigal
Designing a quality improvement activity can be labor intensive and intimidating to facilitators who have not been specially trained in process improvement methodologies. To simplify the process, a team was formed with the specific task of developing a basic model that addresses key concepts in change theory. The 2010 Institute of Medicine report stresses the importance of health care professionals working together, collaboratively, to use data to improve patient outcomes and improve care nationally. In addition, as noted in Quality and Safety Education for Nurses (2013), competencies have been developed to promote frontline problem solving including using data for quality improvement, providing safe care, functioning in collaborative teams, respecting and addressing patient and family concerns, applying evidence-based practice, and using informatics to make decisions...
January 2017: Critical Care Nursing Quarterly
https://www.readbyqxmd.com/read/27891086/circuits-regulating-pleasure-and-happiness-mechanisms-of-depression
#15
Anton J M Loonen, Svetlana A Ivanova
According to our model of the regulation of appetitive-searching vs. distress-avoiding behaviors, the motivation to display these essential conducts is regulated by two parallel cortico-striato-thalamo-cortical, re-entry circuits, including the core and the shell parts of the nucleus accumbens, respectively. An entire series of basal ganglia, running from the caudate nucleus on one side, to the centromedial amygdala on the other side, controls the intensity of these reward-seeking and misery-fleeing behaviors by stimulating the activity of the (pre)frontal and limbic cortices...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/27890472/dna-damage-talks-to-inflammation
#16
Idan Cohen
Interleukin-1 alpha (IL-1α) and beta (IL-1β) are pleiotropic cytokines affecting multiple cells and regulating many immune and inflammatory responses. The recent finding that nuclear IL-1α is recruited to sites of DNA damage, and its ability to actively sense and report genotoxic stress to the surrounding tissue, dramatically alters the way we view IL-1 biology. This discovery add a new face to the classical "danger theory" and show that danger signaling is not strictly limited to passive release or dying cells...
November 18, 2016: Cytokine & Growth Factor Reviews
https://www.readbyqxmd.com/read/27889525/nano-scale-elastic-plastic-properties-and-indentation-induced-deformation-of-single-crystal-4h-sic
#17
A Nawaz, W G Mao, C Lu, Y G Shen
The nanoscale elastic-plastic response of single crystal 4H-SiC has been investigated by nanoindentationwith a Berkovich tip. The hardness (H) and elastic modulus (E) determined in the load-independent region were 36±2GPa and 413±8GPa, respectively. The indentation size effect (ISE) of hardness within an indentation depth of 60nm was systematically analyzed by the Nix-Gao model. Pop-in events occurring at a depth of ~23nm with indentation loads of 0.60-0.65mN were confirmed to indicate the elastic-plastic transition of the crystal, on the basis of the Hertzian contact theory and Johnson's cavity model...
November 17, 2016: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/27888771/increased-anxiety-like-behaviors-but-blunted-cortisol-stress-response-after-neonatal-hippocampal-lesions-in-monkeys
#18
Jessica Raper, Mark Wilson, Mar Sanchez, Christa Payne, Jocelyne Bachevalier
The hippocampus is most notably known for its role in cognition and spatial memory; however it also plays an essential role in emotional behaviors and neuroendocrine responses. The current study investigated the long-term effects of neonatal hippocampal lesions (Neo-Hibo) on emotional and hypothalamic-pituitary-adrenal (HPA) axis functioning. During infancy, unlike controls, Neo-Hibo monkeys exhibited enhanced expression of emotional behaviors (e.g. freezing, anxiety-like, and self-directed behaviors) when exposed to a human intruder (HI task)...
November 18, 2016: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/27885069/exploring-family-stigma-among-caregivers-of-persons-with-alzheimer-s-disease-the-experiences-of-israeli-arab-caregivers
#19
Hanan Abojabel, Perla Werner
Providing care to persons with Alzheimer's disease poses challenges for spouses and adult children, including experiencing stigmatic beliefs towards themselves-i.e., family stigma. Drawing on the frameworks of ethnicity and stigma and ethnicity and dementia, the current study explored stigmatic experiences among Israeli Arab family caregivers of a person with Alzheimer's disease. Three focus groups with 20 caregivers (adult children and spouses) of persons with Alzheimer's disease were conducted. Data were analyzed using theory-led thematic analysis...
November 24, 2016: Dementia
https://www.readbyqxmd.com/read/27884403/chairside-cad-cam-materials-part-2-flexural-strength-testing
#20
Michael Wendler, Renan Belli, Anselm Petschelt, Daniel Mevec, Walter Harrer, Tanja Lube, Robert Danzer, Ulrich Lohbauer
OBJECTIVE: Strength is one of the preferred parameters used in dentistry for determining clinical indication of dental restoratives. However, small dimensions of CAD/CAM blocks limit reliable measurements with standardized uniaxial bending tests. The objective of this study was to introduce the ball-on-three-ball (B3B) biaxial strength test for dental for small CAD/CAM block in the context of the size effect on strength predicted by the Weibull theory. METHODS: Eight representative chairside CAD/CAM materials ranging from polycrystalline zirconia (e...
November 21, 2016: Dental Materials: Official Publication of the Academy of Dental Materials
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