1,356,972 research outputs found
Dataset on RbcL Parkia biglobosa in Nigeria
No full textThe data presents genetic intraspecific diversity and population structure of the African locust bean (Parkia biglobosa) in Nigeria. A total of sixty-two accessions consisting of three populations from the major agro-ecological areas (AEA) of Nigeria was subjected to PCR amplification and Sanger Sequencing using ribulose-1,5-bisphosphate carboxylase/oxygenase large subunit (rbcL) gene. Table 1 shows the collection areas and AEAs of P. biglobosa accessions while Figure 1 describes their distribution across Nigeria. Table 2 provides information on the primer sequences used for amplification and sequencing while Table 3 describes nucleotide sequence statistics. The Maximum Likelihood fits of different nucleotide substitution models with the frequency of occurrences of nucleotide bases are summarized in Table 4. Genetic diversity parameters such as the total number of sites, invariable sites, parsimony information sites, the total number of mutations (Eta), number of haplotypes, gene diversity, the variance of haplotypes, nucleotide diversity, the total number of insertion and deletions (InDels) and the total number of InDels events were described on Table 5. The distribution of haplotypes across the 62 accessions of P. biglobosa is presented in Table 6 while multidomain analysis and population structure were described in Table 7. Gene flow and genetic differentiations amongst the different populations of P. biglobosa are presented in Table 8 whereas Table 9 explains the codon usage and amino acids residues of P. biglobosa in Nigeria
Researching Widening Participation (WP) in Engineering - PTAS Project Data
No full textThis data set is a record of the survey carried out as part of the PTAS project titled researching widening participation in Engineering
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
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
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
A Comparative Analysis of Two Creative Metal Sculptors: Adeola Balogun and Dotun Popoola
No full textWelded metal sculpture has gained significant recognition within the art world. It is exhibited in prestigious galleries, museums, and public spaces globally. This article presents a comparative analysis of two renowned welded metal sculptors, Adeola Balogun and Dotun Popoola examining their artistic styles, techniques, and thematic representations. Research has been carried out on these two artists but the comparative analysis of their works is yet to be documented hence this study. By exploring the work of these artists, the article aims to provide insights into the diverse approaches employed in the field of welded metal sculpture. The analysis is supported by critical evaluation of relevant sources including scholarly articles, books, and gallery exhibitions, to highlight the distinctive characteristics and contributions of each artist.
Keywords: Welded metal, sculpture comparative analysis
Study of MIMO techniques for optical wireless communications
No full textWith its huge spectral resource, optical wireless communication (OWC) has emerged as a
promising complementary technology to the radio frequency (RF) communication systems.
OWC provides data communications for a variety of user applications and it can be deployed
using simple, low-cost, low-power and energy-efficient component. In order to enhance
capacity, reliability and/or coverage of OWC, multiple-input-multiple-output (MIMO) systems
are employed to exploit additional degrees of freedom, such as the location and angular
orientation of optical sources and detectors. However, the implementation of MIMO systems is
faced with challenges such as the strong correlation and multipath propagation in indoor OWC
channels, system synchronisation, as well as inter-channel interference (ICI) due to multiple
parallel data transmission. This dissertation investigates MIMO OWC systems which utilises
transmission techniques with reduced complexity. A detailed study and performance evaluation
of the techniques in terms of capacity, spectral efficiency and error rates is conducted through
theoretical analysis, simulation and experiments. The system performance is investigated
under different constraints imposed by impairments such as interference, synchronization and
channel correlation.
Optical spatial modulation (OSM) is studied as a low complexity technique using multiple
light sources to enhance system capacity. A generalised framework for implementing OSM
with energy efficient pulse position modulation scheme is devised. This framework supports
other variants of OSM, and it can be adapted to satisfy varying system requirement such
as spectral and energy efficiencies. The performance of the OWC system is investigated in
indoor line-of-sight (LOS) propagation. The error performance of the system is analysed
theoretically and matched by simulation results. Also, the system performance is evaluated
with experiments to demonstrate feasibility. Furthermore, the performance of OSM MIMO
techniques in the realistic indoor scenario is considered by taking into account the multiple
reflections of the transmitted signal from room surfaces. This is motivated by the recent drive
towards high-speed Gigabits per second (Gbps) data communication, where the inter-symbol
interference (ISI) caused by the multipath propagation may pose a major bottleneck. A model
of the multipath-induced ISI is presented to account for signal spreading and then applied to
formulate the error performance analysis. The impact of multipath-induced power penalty and
delay spread on system performance is demonstrated using their spatial distributions across the
coverage area. Additionally, the impact of timing synchronization problems on the error performance of
different variants of the OSM MIMO techniques is investigated. While most works related
to SM have assumed a perfect synchronization among the multiple transmitter and receiver
elements, such assumption pose a challenge in practical deployment. Hence, the need to
examine the impact of synchronisation error that can result from clock jitters and variations
in propagation delay. Synchronisation error analyses of OSM schemes are presented, and
the tolerance of each scheme to timing synchronization errors is demonstrated. To further
enhance system capacity, this thesis also explores spatial multiplexing MIMO technique with
orthogonal frequency division multiplexing (OFDM). The central objective is to propose and
apply techniques to address the correlation of the indoor optical wireless channel and the
frequency selectivity due to the limited bandwidth of LEDs. To address these two effects,
a joint coding of paired information symbols was applied in a technique termed pairwise
coding (PWC). This technique is based on rotated symbol constellation and it offers significant
performance improvement. The error performance of the proposed system is evaluated through
simulation and experimental demonstration. PWC proved to be effective over varying degrees
of bandwidth limitation and under different channel conditions
Author, publisher and bookseller : a tripartite synergy in Nigerian book industry
No full textThis work is about the roles of Author, Publisher and Bookseller in Book development in
Nigeria. The paper started by delving into the history of Book Publishing in Nigeria after
which it proceeded by defining who an author, a publisher, and a bookseller is and
expatiated on the indispensable roles of these key actors in Nigerian Book Industry and in
the emerging Information Society. Furthermore, the various constraints to book
development were identified while the paper advised on how the Book Industry can be
further promoted in Nigeria. However, the paper concluded and made recommendations
on how the Book sector can help in enhancing scholarship in the country
The Thursday Murder Club: Launching a megabrand author - a publishing case study
No full textIn 2020, the Christmas book charts in the UK made headlines: Barack Obama’s eagerly awaited autobiography, The Promised Land, was beaten to the top spot by The Thursday Murder Club by Richard Osman, a debut cosy crime novel set in a retirement village. Not only did Osman’s book beat the former US president’s expected bestseller, it also broke records, becoming the fastest-selling debut crime novel of all time. Although Osman has a certain level of fame in the UK from his TV appearances on shows such as Pointless, his celebrity status does not entirely explain the novel’s huge sales. This article tracks the acquisition, publication, and promotion journey of The Thursday Murder Club in order to understand the industry and cultural context of its success and to interrogate the role of celebrity in the creation of author brands. The findings suggest that the unexpected scale of the success of the book owed to a number of factors, including in-depth editing by the novel’s agent, editor, and author to tighten up the plot, an extensive and strategic promotional campaign, the pandemic (which drove interest in the book’s genre and themes), and the quality of the writing. We find that the book’s success was accentuated by Osman’s celebrity status rather than being entirely reliant on it. This research adds to the growing scholarship on celebrity authorship by means of an in-depth case study and provides insight into the processes behind publishing a ‘celebrity’ book and launching a megabrand author
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