1,720,994 research outputs found
Magnetic field effects on T-c and the pseudogap onset temperature in cuprate superconductors
No full textPair excitations, collective modes, and gauge invariance in the BCS-Bose-Einstein crossover scenario
No full textA precursor superconductivity approach to the magnetic field effects in the pseudogap phase
No full textMagnetic-field effects in the pseudogap phase: A competing energy gap scenario for precursor superconductivity
No full textIncreased serum high-mobility group box-1 and cleaved receptor for advanced glycation endproducts levels and decreased endogenous secretory receptor for advanced glycation endproducts levels in diabetic and non-diabetic patients with heart failure
No full textAims: High-mobility group box-1 (HMGB1) is a ligand for the receptor for advanced glycation endproducts (RAGE). An
HMGB1–RAGE interaction has been implicated in cardiac dysfunction. We assessed the association of HMGB1
and RAGE isoforms with heart failure (HF) in diabetic and non-diabetic patients.
Methods and results:
We assayed serum levels of HMGB1, cleaved RAGE (cRAGE), endogenous secretory RAGE (esRAGE), high-sensitivity
C-reactive protein (hsCRP), and N-terminal pro-brain natriuretic peptide (NT-proBNP) in parallel with assessment
of left ventricular volumes and function in 125 diabetic and 222 non-diabetic Chinese patients with chronic HF.
Of the total, 79 diabetic patients without HF and 220 normal subjects served as diabetic and normal controls,
respectively. Serum HMGB1, cRAGE, hsCRP, and NT-proBNP levels were higher and, in contrast, esRAGE levels
lower in HF patients than in subjects without HF (for all; P , 0.01), with higher levels of cRAGE and hsCRP in diabetic
HF vs. non-diabetic HF patients (P , 0.01). For HF patients—with or without diabetes—HMGB1 levels correlated
positively with left ventricular end-diastolic and end-systolic volumes (r 1⁄4 0.267 and r 1⁄4 0.321, respectively) and
NT-proBNP values (r 1⁄4 0.497), and were inversely related to ejection fraction (r 1⁄4 20.461; all P , 0.001). Serum
cRAGE levels correlated with NT-proBNP values (r 1⁄4 0.451) and New York Heart Association functional class
(r 1⁄4 0.402; both P , 0.001). Multivariable regression analysis revealed that HMGB1, cRAGE, and esRAGE were consistently
associated with HF in diabetic and non-diabetic patients.
Conclusion: Heart failure patients have increased serum HMGB1 and cRAGE and decreased esRAGE levels, and these are related
to the severity of HF in both diabetic and non-diabetic patients. Such associations are worth further investigation
The origin of the pseudogap phase: precursor superconductivity versus a competing energy gap scenario
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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