1,086 research outputs found

    New Integrable Multi-Component NLS Type Equations on Symmetric Spaces: Z_4 and Z_6 Reductions

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    The reductions of the multi-component nonlinear Schrodinger (MNLS) type models related to C.I and D.III type symmetric spaces are studied. We pay special attention to the MNLS related to the sp(4), so(10) and so(12) Lie algebras. The MNLS related to sp(4) is a three-component MNLS which finds applications to Bose-Einstein condensates. The MNLS related to so(12) and so(10) Lie algebras after convenient Z_6 or Z_4 reductions reduce to three and four-component MNLS showing new types of chi ^(3)-interactions that are integrable. We briefly explain how these new types of MNLS can be integrated by the inverse scattering method. The spectral properties of the Lax operators L and the corresponding recursion operator Lambda are outlined. Applications to spinor model of Bose-Einstein condensates are discussed.Comment: Reported to the Seventh International conference "Geometry, Integrability and Quantization", June 2--10, 2005, Varna, Bulgari

    Fordy-Kulish models and spinor Bose-Einstein condensates

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    A three-component nonlinear Schrodinger-type model which describes spinor Bose-Einstein condensate (BEC) is considered. This model is integrable by the inverse scattering method and using Zakharov-Shabat dressing method we obtain three types of soliton solutions. The multi-component nonlinear Schrodinger type models related to symmetric spaces C.I Sp(4)/U(2) is studied.Comment: 8 pages, LaTeX, jnmp styl

    THORACIC DUCT DRAINAGE WITH AN ACUTE PERITONITIS

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    No abstrac

    Intervention Strategies Promoting Academic Self-Efficacy in Prospective First-Generation College Students: A Literature Review

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    This literature review first identifies the challenges facing prospective first-generation college students (PFGCS) including a lack of academic preparation in high school, financial barriers created by lower socioeconomic status (SES), and a lack of family support due to unfamiliarity with higher education (Majer, 2009; Olive, 2008; Weiser & Riggio, 2010). Second, this literature review examines the positive correlation between increased academic self-efficacy (ASE) and academic achievement (Elias & Loomis, 2002; Robbins et al., 2004; Zajacova, Lynch, & Espenshade, 2005). Third, this literature review provides a conceptual framework for PFGCS intervention program development based on four strategies found to influence ASE: enactive experiences, vicarious experiences, verbal persuasion, and physiological and affective states (Gandara & Bail, 2001; Habel, 2009; Robbins et al., 2004; Zimmerman, 2000). Fourth, the literature review provides implications including the proposed use of an ASE framework for existing intervention program assessment, a recommendation for the use of an ASE framework to guide high school educator and program administrator activities, and the proposed use of an ASE framework for school counselor planning activities serving the PFGCS population

    Effect of an electric field on a floating lipid bilayer: a neutron reflectivity study

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    We present here a neutron reflectivity study of the influence of an alternative electric field on a supported phospholipid double bilayer. We report for the first time a reproducible increase of the fluctuation amplitude leading to the complete unbinding of the floating bilayer. Results are in good agreement with a semi-quantitative interpretation in terms of negative electrostatic surface tension.Comment: 12 pages, 7 figures, 1 table accepted for publication in European Physical Journal E Replaced with with correct bibliograph

    Immune Status of Individuals with Traumatic Spinal Cord Injury: A Systematic Review and Meta-Analysis.

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    Individuals with spinal cord injury (SCI) have higher infection rates compared to those without SCI. In this review, the immune status difference between individuals with and without traumatic SCI is investigated by examining their peripheral immune cells and markers. PubMed, Cochrane, EMBASE, and Ovid MEDLINE were searched without language or date restrictions. Studies reporting peripheral immune markers' concentration and changes in functional capabilities of immune cells that compared individuals with and without SCI were included. Studies with participants with active infection, immune disease, and central nervous system (CNS) immune markers were excluded. The review followed the PRISMA guidelines. Effect estimates were measured by Weighted Mean Difference (WMD) using a random-effects model. Study quality was assessed using the National Heart, Lung, and Blood Institute Quality Assessment Tool. Fifty-four studies (1813 with SCI and 1378 without SCI) contributed to the meta-analysis. Leukocytes (n = 23, WMD 0.78, 95% CI 0.17; 1.38, I2 83%), neutrophils (n = 11, WMD 0.76, 95% CI 0.09; 1.42, I2 89%), C-reactive protein (CRP) (n = 12, WMD 2.25, 95% CI 1.14; 3.56, I2 95%), and IL6 (n = 13, WMD 2.33, 95% CI 1.20; 3.49, I2 97%) were higher in individuals with SCI vs. without SCI. Clinical factors (phase of injury, completeness of injury, sympathetic innervation impairment, age, sex) and study-related factors (sample size, study design, and serum vs. plasma) partially explained heterogeneity. Immune cells exhibited lower functional capability in individuals with SCI vs. those without SCI. Most studies (75.6%) had a moderate risk of bias. The immune status of individuals with SCI differs from those without SCI and is clinically influenced by the phase of injury, completeness of injury, sympathetic innervation impairment, age, and sex. These results provide information that is vital for monitoring and management strategies to effectively improve the immune status of individuals with SCI
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