1,721,014 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
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
The thermal annealing induced ferromagnetism at room temperature in the MoSe2/WSe2 powder
No full textThe introduction of ferromagnetism in two-dimensional materials increases its application in the spintronics devices. In this work, we study the magnetic characteristic of MoSe2/ WSe2 mixed powder with different annealing temperatures(800\ue2~1100\ue2). The ferromagnetism and red shift Raman peaks are observed in samples at room temperature, except the sample with 1100\ue2 thermal annealed. The result from the 1000\ue2 thermal annealed sample reveal that the coercive field reaches 1324 Oe at 300 K and 2695 Oe at 5 K. It is highest coercivity in the reported TMD systems. Our results support that different from the wide reported structure defect or transition element dopant, the ferromagnetism originates from the structure distortion due to the chemical bonding at the boundary between MoSe2 and WSe2. The EMPA experiment result reveals that the ferromagnetism is intrinsic not from the magnetic impurity
The temperature-independent paramagnetism susceptibility peak at zero magnetic fields in the non-topological WSe2 single crystal
No full textThis research is mainly focused on using chemical vapor transport method to grow WSe2 single crystal. First of all, the 99.99% tungsten powder, selenium are sealed in silica glass tube under secondary vacuum. The crystal growth process is divided into three steps, the first step being to synthesize the elements into polycrystalline powder. Secondly, raising the temperature to anneal the powder for 96~120 hours in order to complete the physical reaction. Finally, sealed the annealed polycrystalline powder and catalyst into a 20 cm silica tube and placed it into a two-zone furnace. Then, the crystal is characterized by different instruments.
We will use X-ray Diffraction (XRD) is to analyze the crystal structure. In addition, use a Raman Spectrometer (RS) to measure the corresponding wavelength of the crystal to confirm whether the crystal is correct. Superconducting quantum interference device (SQUID) is used to detect the magnetic properties of materials using different temperatures and magnetic fields to understand whether the paramagnetic susceptibility peak is temperature-dependent. We use transmission electron microscope (TEM) to observe the surface morphology of the samples, and use inductively coupled plasma mass spectrometer (ICP-MS) to confirm the material is impregnated with other magnetic elements. The temperature-independent paramagnetic peaks are observed in the non-topological WSe2 single crystal.
This subverts the widely reported concept that the temperature-independent paramagnetic peaks in topological materials originate from the spin texture of topological surface state. Weak ferromagnetic characteristic was observed from the susceptibility measurement from 5 to 300 K. The high-resolution transmission electron microscope supports that the ferromagnetism originates from lattice dislocation at different layer plane and axis. The temperature-independent paramagnetism susceptibility peak might originate from the ferromagnetism induced by the lattice dislocation
Study on phase stability and epitaxial growth of Co electrodeposited on Cu substrates
No full textIn this study, the effects of electroplating conditions and copper substrate orientation on the phase of cobalt coatings were investigated in cobalt sulfate bath system and watt bath system. By changing the current density, bath pH and temperature, the phase composition and epitaxial preferred orientation of the cobalt coating were observed under different electroplating conditions, and the influence of bath pH was the most significant. The surface morphology of the cobalt coating was observed with a scanning electron microscope, the crystallographic orientation of the coating was analyzed with an X-ray diffractometer, and the crystallographic orientation of the micro-area and cross-section on the surface of the coating was analyzed by electron backscatter diffraction. Organizing, classifying and summarizing different growth patterns. Obtained in the initial growth stage, low bath concentration, low pH value and high current density are conducive to the growth of \uce\ub2-phase coating on the substrate grains in an epitaxial manner, and the azimuth relationship between the two is cube-on-cube or /60\uc2\ub0 \uce\ua33 twin relationship. On the contrary, it is beneficial for the \uce\ub1-phase coating to grow on the substrate crystal grains in an epitaxial manner, and the azimuth relationship between the two is {111}Cu//{0001}\uce\ub1- Co or {001}Cu//{0001}\uce\ub1-Co or with new {001}Cu//{0001}\uce\ub1-Co, or with new The new \uce\ub1-phase grains are nucleated in the \uce\ub1-phase epitaxial layer via the twin relationship of /86\uc2\ub0. When the pH value is between 2 and 3, the \uce\ub1-phase and \uce\ub2-phase coatings grow on the surface of the substrate in an epitaxial manner at the same time, and the \uce\ub1-phase is easy to be on the substrate grains of (111), with {111}Cu//{0001}\uce\ub1-Co is epitaxially grown in the orientation relationship, and the \uce\ub2 phase is also epitaxially grown on the substrate crystal grains in the cube-on-cube orientation relationship. As the plating time increases, the \uce\ub1-phase grains grow in a columnar manner in the later stage, mainly with //ND and //ND and //ND orientations as Lord, in a competitive growth relationship. When the thickness of the coating reaches 10 \uce\ubcm, //ND is the main aggregate structure of the coating
- …
