1,356,712 research outputs found
Exploiting assembly pheromone for the control of ixodid ticks
No full textRanju, R.S., Latha, Bhaskaran Ravi, Leela, V. (2018): Exploiting assembly pheromone for the control of ixodid ticks. Acarologia 58 (2): 471-482, DOI: 10.24349/acarologia/20184254, URL: http://dx.doi.org/10.24349/acarologia/2018425
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Steric and electronic effects of N-coordinated NC- and NCS- on NiS2PN: synthesis, spectral and single crystal X-ray structural studies on N,N'-di-n-butyldithiocarbamate complexes of nickel(II) with phosphorus and nitrogen donor ligands
No full textPlanar nickel(II) complexes involving N,N'-dibutyldithiocarbamate, such as [Ni(bu(2)dtc)(PPh(3))(NC)] (1) and [Ni(bu(2)dtc)(PPh(3))(NCS)] (2) (where bu(2)dtc N,N'-dibutyldithiocarbamate anion) have been prepared, characterized by electronic, IR and NMR spectra and their structures determined by single crystal X-ray crystallography. Cyclic voltammetric characterizations of the complexes are also reported. IR spectra of the two complexes indicate the isobidentate coordination (nu(c-s) similar or equal to 1095 cm(-1) without splitting) of the dithiocarbamate moiety. The important stretching mode characteristic of the thioureide bond (nu(C-N)) occurs at higher wave numbers compared to that of the parent dithiocarbamate complex [Ni(bu(2)dtc) 2]. The electronic spectra of 1 and 2 show signature bands at 426 nm and 478 nm, respectively. NMR spectra show large (31)P chemical shifts in both compounds and the most important N(13)CS(2) chemical shift appears at 204.86 ppm and 203.23 ppm for 1 and 2, respectively. The CV studies clearly show the presence of reduced electron density on the nickel ions in mixed-ligand complexes 1 and 2 compared to the parent dithiocarbamate. Single crystal X-ray structure studies show that 2 crystallizes as a new triclinic polymorph, whose molecular structure closely resembles that of the previously reported monoclinic form. Both complexes contain a planar NiS(2)PN chromophore in keeping with the observed diamagnetism. In both complexes the Ni-S distances are significantly different. The thioureide C-N distances of the complexes are shorter than those observed in the parent [Ni(bu(2)dtc)(2)]. The two compounds allow comparison of the influence of NCS-in place of NC(-)
Ultra-wideband far-infrared absorber based on anisotropically etched doped silicon
No full textAbstract not available.Xiaolong You, Aditi Upadhyay, Yongzhi Cheng, Madhu Bhaskaran, Sharath Sriram, Christophe Fumeaux, and Withawat Withayachumnanku
Variations on the Author
No full text“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
No full textWe 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
Figure 2 in Exploiting assembly pheromone for the control of ixodid ticks
No full textFigure 2 Behavioural responses of ixodid tick larvae to assembly pheromone: A – Curled leg appearance ofHyalomma marginatumlarvae; BPublished as part of Ranju, R.S., Latha, Bhaskaran Ravi & Leela, V., 2018, Exploiting assembly pheromone for the control of ixodid ticks, pp. 471-482 in Acarologia 58 (2) on page 477, DOI: 10.24349/acarologia/20184254, http://zenodo.org/record/539906
Ontogeny of the cyclic amp-dependent protein kinase in the developing chick brain
No full textTypescript (photocopy).Ontogenic relationships between levels of cAMP binding activity and protein kinase activity were examined in subcellular fractions of the brain from day 10 of embryogenesis to day 14 post hatch. The cytoplasmic fraction showed no embryonic changes in protein kinase activity, but did increase rapidly from hatch to day 3 post hatch. Both the nuclear and particulate fractions showed a progressive increase in activity during embryogenesis that continued till day 3 post hatch for the particulate fraction and day 14 post hatch for the nuclei. Use of the heat stable protein kinase inhibitor showed that the protein kinase activity of the cytoplasmic and particulate fractions were predominately cAMP-dependent with that of the nuclei being predominately cAMP-independent. The changes in cAMP binding do not parallel that of the protein kinase activity and show no change in activity throughout development. Characterization of the protein kinase isoenzymes by DEAE-cellulose chromatography reveals a type I and II isoenzyme in the cytoplasm and that the post natal changes are due to an increase in type I isoenzyme. The isoenzyme pattern of the particulate fraction shows it to be predominately type II
Dispelling the Myths Behind First-author Citation Counts
No full textWe 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
Ultrabroadband reflective polarization convertor for terahertz waves
No full textAbstract not available.Yong Zhi Cheng, Withawat Withayachumnankul, Aditi Upadhyay, Daniel Headland, Yan Nie, Rong Zhou Gong, Madhu Bhaskaran, Sharath Sriram, and Derek Abbot
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