1,493 research outputs found

    The hierarchy of higher order solutions of the derivative nonlinear Schr\"odinger equation

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    In this paper, we provide a simple method to generate higher order position solutions and rogue wave solutions for the derivative nonlinear Schr\"odinger equation. The formulae of these higher order solutions are given in terms of determinants. The dynamics and structures of solutions generated by this method are studied

    Coherent photo-produced J/ψ/\psi and dielectron yields in isobaric collisions

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    Recently, significant enhancements of J/ψ\psi and e+e−e^{+} e^{-} pair production at very low transverse momenta were observed by the STAR and ALICE collaboration in peripheral hadronic A+A collisions. The anomaly excesses point to evidence of coherent photon-nucleus and photon-photon interactions in violent hadronic heavy-ion collisions, which were conventionally studied only in ultra-peripheral collisions. The isobaric collisions performed at RHIC provides a unique opportunity to test the existence of coherent photon products in hadronic heavy-ion collisions. The idea is that the possible production of coherent photon products is significantly different in different collision systems due to the variations in their charge and nuclear density distributions. In this letter, we focus on the peripheral collisions and provide theoretical predictions for coherent production of J/ψ\psi and dielectron in isobaric collisions. We show that the expected yields differ significantly to perform the experimental test

    The higher order Rogue Wave solutions of the Gerdjikov-Ivanov equation

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    We construct higher order rogue wave solutions for the Gerdjikov-Ivanov equation explicitly in term of determinant expression. Dynamics of both soliton and non-soliton solutions is discussed. A family of solutions with distinct structures are presented, which are new to the Gerdjikov-Ivanov equation

    Comparative studies on the therapeutic and adverse effects of mirtazapine and fluoxetine in the treatment of adult depression

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    Purpose: To evaluate comparatively the therapeutic and adverse effects of mirtazapine and fluoxetine for the management of adult depression.Methods: Adults (58) with depression admitted to the Neurology Department of Zaozhuang Municipal Hospital from August 2014 to July 2016 were randomly assigned to either mirtazapine group or fluoxetine group. Those in mirtazapine group were given mirtazapine while the fluoxetine group took fluoxetine. The patients were graded for Hamilton Depression Scale (HAMD) and Treatment Emergent Symptoms Scale (TESS) scores before treatment and at weeks 2, 4, 6, and 8 post-treatment, with the aim of comparing therapeutic effects and adverse reactions to mirtazapine and fluoxetine.Results: The therapeutic effects seen in the two groups did not differ significantly (p > 0.05), but mirtazapine had a slight advantage over fluoxetine. Effectiveness appeared after 2 weeks in the mirtazapine group, and 4 weeks in the other group. Moreover, there were significant differences in HAMD scores between the two groups after 2 and 4 weeks of treatment (p < 0.05), but the differences in scores after 6 and 8 weeks of treatment were not significant (p > 0.05). However, there were significant differences in score between pretreatment and 8-week post-treatment scores (p < 0.05). Mirtazapine group also had lower incidents of adverse reactions (sleepiness, dyspepsia, nausea, vomiting, excitation, and headache) than the fluoxetine group (p < 0.05).Conclusion: Mirtazapine has similar effect as fluoxetine in the treatment of adult depression, but works faster, with low incidence of adverse reactions. Thus, it is a safer and quicker antidepressant for clinical application.Keywords: Mirtazapine, Fluoxetine, Adult depression, Clinical effect, Adverse reaction

    Establishing a Vibrant Information Literacy Program in the Absence of Curriculum Mandate: A Case Study

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    This article describes how the Skillman Library at Lafayette College uses internal grants to successfully integrate information literacy into upper-level courses. There is a general consensus among faculty grant recipients that integrating information literacy in their courses not only improves students’ skills as consumers of information but also helps students understand how scholars have answered questions in their particular field, and how the students themselves can contribute to the creation of knowledge. Due to their positive grant course experience, faculty members continue to build information literacy in their courses and are advocates for information literacy. The grant program created a culture of information literacy at Lafayette College and led to further pedagogical and curricular changes. It has also allowed librarians to venture into new territories such as studio art and expanded our involvement from guest lecturers to co-designing and co-teaching courses

    Can pragmatic inference benefit from topic prominence? ERP evidence from Mandarin Chinese

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    This study investigated how pragmatic inference making is modulated by information structure in preceding text. We created three types of two-clause structures in which the interpretation of a critical word in the second clause was dependent on the engagement of pragmatic inference as well as a successful establishment of a referential relation between the target word and an intended antecedent in the preceding text. An enhanced P600 response was elicited by target words when the intended referent was in non-topic position compared to topic position or sub-topic position. Moreover, a reduced N400 was elicited by the target word when the intended referent in the preceding clause was in non-topic position, compared to topic position. These findings suggest that the process of building an inferential relation can benefit from information structural prominence of topicality

    SIFT Saliency Analysis for Matching Repetitive Structures

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    The ambiguity resulting from repetitive structures in a scene presents a major challenge for image matching. This paper proposes a matching method based on SIFT feature saliency analysis to achieve robust feature matching between images with repetitive structures. The feature saliency within the reference image is estimated by analyzing feature stability and dissimilarity via Monte-Carlo simulation. In the proposed method, feature matching is performed only within the region of interest to reduce the ambiguity caused by repetitive structures. The experimental results demonstrate the efficiency and robustness of the proposed method, especially in the presence of respective structures
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