635 research outputs found
The effect of joint conditions on the longitudinal and flexural wave velocities of rock mass
No full text
A connectionist and multivariate approach to science maps: the SOM, clustering and MDS applied to library and information science research
No full textThe visualization of scientific field structures is a classic of scientometric studies. This paper presents a domain analysis of the library and information science discipline based on author co-citation analysis (ACA) and journal cocitation analysis (JCA). The techniques used for map construction are the self-organizing map (SOM) neural algorithm, Ward’s clustering method and multidimensional scaling (MDS). The results of this study are compared with similar research developed by Howard White and Katherine McCain [1]. The methodologies used allow us to confirm that the subject domains identified in this paper are, as well,
present in our study for the corresponding period. The appearance of studies pertaining to library science reveals the relationship of this realm with information science. Especially significant is the presence of the management on the journal maps. From a methodological standpoint, meanwhile, we would agree with those authors who consider MDS, the SOM and clustering as complementary methods that provide representations of the same reality from different analytical points of view. Even so, the MDS representation is the one offering greater possibilities for the structural representation of the clusters in a set of variables
A Connectionist and Multivariate Approach to Science Maps: Som, Clustering and Mds Applied to Library & Information Science Research.
No full textThe visualization of scientific field structures is a classic of scientometric studies. This paper presents a domain analysis of the library and information science discipline based on author co-citation analysis (ACA) and journal cocitation analysis (JCA). The techniques used for map construction are the self-organizing map (SOM) neural
algorithm, Ward’s clustering method and multidimensional
scaling (MDS). The results of this study are compared with
similar research developed by Howard White and Katherine
McCain [1]. The methodologies used allow us to confirm that
the subject domains identified in this paper are, as well,
present in our study for the corresponding period. The appearance of studies pertaining to library science reveals
the relationship of this realm with information science.
Especially significant is the presence of the management on the journal maps. From a methodological standpoint, meanwhile, we would agree with those authors who consider
MDS, the SOM and clustering as complementary methods
that provide representations of the same reality from different analytical points of view. Even so, the MDS representation is the one offering greater possibilities for the structural representation of the clusters in a set of variables
Environment-insensitive two-photon ratiometric probe for in cellulo quantitative measurement of hydrogen peroxide
No full textThe quantitative analysis of a biological analyte directly through fluorescence imaging is essential in biomedical sciences but remains as a challenge owing to the environment-sensitive nature of fluorescence intensity. We show that a fluorescent hydrogen peroxide probe based on an in cellulo super-bright benzothiazolyl-benzocoumarin dye of which emission properties are insensitive to environmental changes offers a reliable and practical means for the quantitative analysis of hydrogen peroxide in cells and tissues directly through ratiometric imaging both under one-photon and two-photon excitation conditions. Different cellular hydrogen peroxide concentrations were determined for several cell lines and also for tumour and normal tissues. © 2021 The Author(s)11Nscopu
On Concept of "Shue" (Emptiness) in Lieh-Tzu
No full textThis paper divided into four parts: (i)preface; (ii)the conception of "shue" in Lieh-Tzu; (iii)The conception in Toaistic school in the Pre-Chin; (iv) conclusion. The author deals with this concept based upon the recent studies-the book of Lieh-Tzu is not an apocrypha. Lieh-Tzu conceived that the saint is the highest stage of human life. The issue is how do one achieve it. His answer is "shue." It has two denotations-"kung-fu" (drill) and the mental stage. "Shue" is not only in the realm of language and conceptual, but also in that of practice. The method of practice is by intellectual reflection and meditation from the concentration of consciousness to that of spirit. Finally, it can unify his spirit with nothing. Nothing is "tao" from the Taoistic point of view. Lieh-Tzu followed the method of the ancient Taoism in practice. But author contends that the method is derived from Lao-Tzu's "shue" of imitating "heaven" which is different from Kuan-Yin-Tzu's in-terpretation of it, that is, "chin" (stillness) of imitating "earth." From historical viewpoint, Lieh-Tzu dealed with the notion of "shue" in order to provide an answer to the meaninglessness of life of the people and disturbance of the society in the warring states period. The author believes that it is the right prescription for it
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