2,340 research outputs found
Spontaneous Parity Violation in SUSY Strong Gauge Theory
We suggest simple models of spontaneous parity violation in supersymmetric
strong gauge theory. We focus on left-right symmetric model and investigate
vacuum with spontaneous parity violation. Non-perturbative effects are
calculable in supersymmetric gauge theory, and we suggest two new models. The
first model shows confinement, and the second model has a dual description of
the theory. The left-right symmetry breaking and electroweak symmetry breaking
are simultaneously occurred with the suitable energy scale hierarchy. The
second model also induces spontaneous supersymmetry breaking.Comment: 14 page
Nonlinear Ultrasonic Properties of As-Quenched Steels
We have investigated the effect of carbon content on the nonlinear ultrasonic parameter β and the longitudinal phase velocity v L in a series of martensitic steel specimens. The specimens were measured in the as-quenched state to insure that the carbon was present primarily as an interstitial in the martensite. Experimentally, β increased with increasing mass percent carbon (or hardness), while v Lremained virtually the same for all specimens. Therefore we conclude that β is sensitive to microstructural variations between the specimens, but v L is not. X-ray diffraction experiments indicate that the dislocation density in the specimens is high (∼1011/cm2) and increases with increasing carbon content. These results support the hypothesis that the observed increase in β may be attributed to dislocations affected by internal stresses in the quenched specimens
Patient-Provider Communication about Cognition and the Role of Memory Concerns: A Descriptive Study
Introduction 40% of Alzheimer’s disease cases could be delayed or prevented with early intervention1 Early detection remains challenging due to lack of consensus regarding screening, time constraints Subjective memory decline (SMD): “the perception of a decline in memory ability when objective cognitive testing indicates normal performance.”2 Linked to early stages of Alzheimer’s Disease and mild cognitive impairment (MCI) Older adults with SCD up to 4 times more likely to develop MCI or dementia3 Older adults consider severity of problems, potential benefits or consequences of disclosing concerns, as well as past interactions with healthcare providers when discussing cognition4 Most older adults do not seek help until cognitive problems are severe and affect activities of daily living5 Previous work has not examined the role of SMD and memory concerns on discussions about cognitio
Aging Expectations Predict Subjective Cognitive Decline Among Community-Dwelling Older Adults
Purpose: Subjective cognitive decline (SCD), or perceived decline in cognition, is a precursor to mild cognitive impairment, a prodrome of Alzheimer’s disease. SCD’s predictive utility is limited as it is impacted by multiple psychosocial factors. Expectations regarding aging among older adults have been linked to self-efficacy and health-related outcomes; however, their relationship with SCD is unknown. The aim of this cross-sectional study was to investigate the relationships between older adults’ aging expectations regarding physical, mental, and cognitive health, and SCD.
Methods: An online survey of community-dwelling adults aged 65 years or older (n=582, M(SD)=71.36(4.80)) with no history of dementia or cognitive impairment was conducted in the United States. Measures included the Expectations Regarding Aging scale (ERA-12), the Everyday Cognition scale (ECog-12), as well as demographics and self-reported health. General linear models demonstrated relationships between the physical, mental, and cognitive expectations subscales of the ERA-12 and ECog-12 scores.
Results:All three domains of aging expectations regarding physical health (b(SE)=-0.033(0.007), p
Conclusion: Older adults\u27 aging expectations were predictive of subjective cognitive decline (SCD) across all domains, indicating a broader impact beyond cognitive function alone. Future research should explore whether this relationship holds in other patient populations, including middle-aged adults and different ethnic groups and whether interventions to modify aging expectations may promote positive perceptions of cognitive function among older adults, which can improve cognitive outcomes.https://jdc.jefferson.edu/aoa_research_symposium_posters/1012/thumbnail.jp
Colored Resonant Signals at the LHC: Largest Rate and Simplest Topology
We study the colored resonance production at the LHC in a most general
approach. We classify the possible colored resonances based on group theory
decomposition, and construct their effective interactions with light partons.
The production cross section from annihilation of valence quarks or gluons may
be on the order of 400 - 1000 pb at LHC energies for a mass of 1 TeV with
nominal couplings, leading to the largest production rates for new physics at
the TeV scale, and simplest event topology with dijet final states. We apply
the new dijet data from the LHC experiments to put bounds on various possible
colored resonant states. The current bounds range from 0.9 to 2.7 TeV. The
formulation is readily applicable for future searches including other decay
modes.Comment: 29 pages, 9 figures. References updated and additional K-factors
include
Proton Pump Inhibitors in the Management of Tachypnoea following Panproctocolectomy: A Case of High Output Ileostomy
High output ileostomies are important complications of stoma formation following bowel surgery. Adequate management of such stomas might prevent severe morbidity and mortality when this potentially fatal complication develops. In this case report, we describe a female patient with a recent ileostomy formation following panproctocolectomy for ulcerative colitis who presented with progressively increasing shortness of breath. The patient was found to have a hypochloraemic metabolic acidosis on arterial blood gases. She rapidly improved with adequate sodium and fluid replacement and with the use of a course of proton pump inhibitors. This case highlights the importance of recognising high output ileostomies early and important management issues in their regard
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