1,723,094 research outputs found
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
Examining the relationship between self-efficacy, career development, and subjective wellbeing in physical education students
Full text linkAbstract We investigated the relationship between self-efficacy and career development via subjective well-being of students majoring in physical education. Life satisfaction, positive affect, and negative affect were the componennts of subjective well-being. Participants were the 1381 adolescents with major in physical education with an age range of 18–22 years (Mage = 19.5 ± 1; females = 34.76%). Hayes PROCESS model was used to develop a multiple mediation model. The results suggest that higher self-efficacy leads to better career development. Further, a significant mediating role was played by negative and positive affect in case of the relationship between self-efficacy and career exploration, but life-satisfaction is not significant mediator. Conversely, life satisfaction and positive affect are significant mediators between self-efficacy and career adaptability but negative affect is not. The findings suggest that self-efficacy and subjective well-being benefit career development of adolescents in the physical education field
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
sj-pdf-1-jpx-10.1177_23743735231183578 - Supplemental material for Knowledge, Attitude, and Practice on Antenatal Care Among Pregnant Women and its Association With Sociodemographic Factors: A Hospital-Based Study
No full textSupplemental material, sj-pdf-1-jpx-10.1177_23743735231183578 for Knowledge, Attitude, and Practice on Antenatal Care Among Pregnant Women and its Association With Sociodemographic Factors: A Hospital-Based Study by Sumaira Bashir, BUMS, MD, Abdul Haseeb Ansari, BUMS, MD and Arshiya Sultana, BUMS, MD in Journal of Patient Experience</p
Bilayer membrane liposome mimicking red blood cell for drug delivery applications / Sumaira Naeem
No full textThe advancement of research in colloidal systems has led to the increased application of this technology in more effective and targeted drug delivery. The first closed bilayer phospholipid system, the liposome system, has been making steady progress in achieving many desirable parameters such as drug loading, size-controlling measures, stability longer circulation half-lives, triggered release and in overcoming obstacles to cellular and tissue uptake of drugs with improved biodistribution in vitro and in vivo. The current study focused on preparing liposomes which could mimic certain characteristics of red blood cell bilayer membranes to overcome problems in sustained and targeted drug delivery. With this aim, liposomes from different phospholipids namely L-α-Phosphatidylcholine (PC), 1,2-Dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) , 1,2-Distearoyl-sn-glycero-3-phosphocholine (DSPC), 1,2-Diacyl-sn-glycero-3-phospho-L-serine (PS) and L-α-Phosphatidylinositol (PI) were formulated in combination with surfactants Polysorbate 80 (TWEEN® 80) and dihexadecyl phosphate (DCP) under physiological conditions. Phosphatidylinositol and dicetyl phosphate were expected to enhance the negative zeta potential of the liposomes in order to mimic red blood cell zeta potential. The newly prepared liposomes were formulated for efficient anticancer drug delivery applications. Liposomes were prepared from thin film hydration technique followed by sonication. Under the optimal experimental conditions, liposomes were formulated to mimic red blood cell surface charge (-3 mV to -14 mV) with a particle size range of 70 nm to 80 nm. The stability of all formulations was investigated by their mean particle size and zeta potential at 4 °C, 28 °C, and 37 °C for 28 days. The presence of liposomes in unsonicated formulations was identified by an optical polarizing microscope which was followed by transmission electron microscopy and field emission scanning electron microscopy for identification of sonicated liposomes. Encapsulation efficiency for all liposomes loaded with different anticancer drugs was more than 60 % using viva spin centrifugal units, however, anticancer drugs with intermediate log P were encapsulated more than 60 %. Less than 20 % of the anticancer drugs were released in first 12 hours showing a released property very useful for inhibiting the proliferation of cancer cells. MDA-MB-231 breast cancer cell line was selected to investigate the in vitro cytotoxic effects of selected liposomes with most commonly used anticancer drug DOX (F1-DOX, F2-DOX, F3-DOX as model formulations) and their response to free and encapsulated DOX concentrations. These liposomes were found to induce significant suppression in MDA-MB-231 breast cancer cell growth qualitatively, whereas no cytotoxicity was observed due to unloaded F3-Liposomes. An obvious cell uptake of DOX was observed by its fluorescence property. Cell uptake by flow cytometry though was quantitatively less than free drug, yet these newly formulated DOX-loaded targeted F3-liposomes suggest potential utility as anticancer agents and may be beneficial for manufacturing biomimetic systems for drug delivery applications
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