1,720,959 research outputs found
Comparison of Cooling Cost Effectiveness Between Unitary and Central Cooling System
Get PDFAir conditioning is a basic need in building spaces to provide indoor comfort. This
research describes the evaluation of cooling cost effectiveness between unitary and
central chiller cooling system. Operational cost involving initial, energy and
maintenance for both systems was analysed throughout the life span period. A case
study was carried out where cooling load requirement of all conditioned spaces was
determined using cooling load temperature difference 1 cooling load factor method.
Currently in-use unitary system data was gathered and an all-water type central
cooling system was proposed as an alternative. Main equipment capacity of the
central system was designed based on cooling load and appropriate heat equation.
The study shows that the central system is the better option for high air conditioning
application of more than 60 kW heat gain. Although central system first cost is
almost double than that of unitary system, it has the advantage of much higher life
span. Cumulative cost analysis for the case study indicates that the investment of
central system provides a payback period of eight years. In addition, the central
system also contributes towards energy conservation by offering lower total power
input of its equipment
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Bio-inspired novel hybrid vertical axis wind turbine / Ts. Dr. Ashwindran Naidu Sanderasagran and Dr. Azizuddin Abd Aziz
Get PDFToday several countries are investing their resources on the development of renewable energy, the focused sector of development in renewable energy is wind power generation. Energy harvested by the wind turbine are relative to wind speed potential regardless the type or configuration of wind turbine used. Design modification were done on wind turbine by engineers in order to adapt the wind speed of the desired geographical area. In Malaysia studies indicated that the average wind speed potential is 2.1 m/s dependent on season and geographical area, which is not adequate in harvesting energy in megawatt scale. Researches indicates that, drag driven wind turbines VAWTs are suitable in harvesting wind energy in low wind speed potential. The objective of this research is to present the aerodynamics performance of a novel bio-inspired hybrid drag driven wind turbine and with two sub objective; operational under low speed wind potential, and low manufacturing cost. In this research, the novel hybrid design were created by the hybridizations of three design elements inspired by nature; Albatross bird’s wing, Pitcher plant, and Tulip flower. The novel wind turbine were design based on the principals of VAWT’s design parameters, in order to maintain design’s practicality and performance. Ansys fluent were used to perform aerodynamic performance study on the design. The usefulness of this research is to broaden the knowledge and understanding of bio-mimicry design implementation and adaptation into wind energy harvesting machinery
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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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