1,721,061 research outputs found
Rising Incidence of Pancreatic Cancer in Patients 20 to 39 Years: A Population-Based Observational Study
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Optimising residential electricity demands through innovative demand side management strategies in Nigeria
No full textMirzania, Pegah - Associate Supervisor
Hart, Phil - Associate SupervisorThe Nigerian power supply faces significant shortages, resulting in frequent nationwide power
outages, load shedding and severe energy crises. The country relies heavily on a centralised
energy mix, primarily comprising gas-fired power plants with a capacity of 10.6 Giga Watt
(GW) and hydropower with a capacity of 1.9 GW. Despite having a total installed capacity of
12.5 GW, only around 4 GW actually reaches end consumers. This is mainly due to limited
transmission infrastructure, inadequate distribution facilities, poor metering, inadequate fuel
supply, lack of market competition and inadequate management of energy resources.
Innovative demand side management (DSM) strategies are required to optimise electricity
demands at customer ends to improve the power supply in Nigeria.
This thesis develops an innovative DSM method of utilising direct load control (DLC), acting
as a mandatory operational strategy for regional residential grids, as opposed to traditional
approach of load shedding. The proposed DLC method controls residential loads by classifying
loads into three different categories: critical, less critical, and non-critical. The evaluating
metrics include energy cost savings and comfort levels of residence (i.e., the length of supply
of the critical loads). Furthermore, paper-based surveys are used as the quantitative methods to
evaluate the understanding, awareness, and attitude of Nigerian households towards DSM
under different representative groups. The survey data are also used to model load profiles, to
which the DLC is applied to validate the proposed DLC method.
The proposed DLC method was compared with load shedding considering three load shedding
scenarios: 1) nobody uses generators during power cut period, 2) running home generators for
4 hours per day during power cut period, and 3) running home generators for 8 hours per day
during power cut period. Simulation results showed that, for scenario 1, the proposed DLC
method results in a 20% of energy cost saving and a 28% improvement of in comfort level; for
scenario 2, the proposed DLC method results in an 87% decrease in household expenditure and
a 5% decrease in comfort level, and for scenario 3, the proposed DLC method results in a 93%
energy cost saving but a 39% decrease in comfort level.
The study shows that households with the post-paid billing systems are less responsive to the
DSM approach. However, the proposed DLC strategy results in higher cost savings on the post-
paid billing systems (23%) than the pre-paid billing systems (17%), both compared to the load
shedding approach. Households working in the public sector who use the pre-paid billing
system have proven to be the most effective target group for implementing DSM. This is
because these households consume 23% more energy on average compared to other
representative household groups. This research presents an innovative DLC method designed
to enhance power supply in residential grids, providing an alternative to load shedding in
developing countries. Additionally, it utilises a methodology that involves gathering data
through paper-based surveys to construct electricity demand profiles, establishing a numerical
dataset for future DSM studies. The research findings reveal that the proposed DLC method
not only lowers energy expenses but also improve overall household comfort and quality of
life.PhD in Energy and Powe
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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