1,720,981 research outputs found
Effect of Orientation on Indoor Thermal Neutrality in Summer Season in Hot Arid Climates
No full textThis work analyzes the effect of prototypical apartments’ orientation on indoor thermal comfort. The apartments are located in a residential building block in October 6th city in the hot-arid climate of Greater Cairo, Egypt. Indoor air temperature (Ta,in) and relative humidity (RHin) were monitored in three hour intervals in the summer season of 2013 during the last two days of June. Outdoor measurements for the ambient temperature and relative humidity for the month of June were obtained from the Meteorological Authority. the comfort zone for the reference case was specified by using ASHRAE psychrometric chart. This is considered the second part of a study that was conducted in the winter season of 2013 to discuss the effect of orientation on indoor thermal comfort for the same reference case in January. A visual survey was conducted in order to analyze the construction materials and façade features of the buildings. Personal observations, field measurements and ASHRAE psycrometric chart analyses show that there is significant thermal discomfort inside the apartments. Furthermore, comparing the three orientations; Northern, Eastern and Western showed that whilst the Northern has a little difference, there is no significant effect on thermal comfort indoors between Eastern and Western orientations
Field Measurements to Validate Simulated Indoor Air Temperature Predictions: A case study of a residential building in a hot arid climate.
No full textThis paper presents a comparison between field measurements and simulated indoor dry bulb temperatures of a case study of residential building stock in October 6th city in Greater Cairo, Egypt. The measurements were conducted in the winter season of 2013 over one week in January. At the beginning of the study a visual survey was conducted for the case study in order to analyze the building’s construction materials and façade formal configurations. Indoor measurements were conducted to specify the indoor air temperature while outdoor measurements for the ambient temperature were provided by the meteorological Authority for the same period. The Indoor measured air temperature was used to validate the indoor simulated air temperature generated from the building performance simulation commercial code IES (Integrated Environmental Solutions - Virtual Environment) under the Egyptian climate conditions
Effect of Orientation on Indoor Thermal Neutrality in Winter Season in Hot Arid Climates Case Study: Residential Building in Greater Cairo
No full textThis work analyzes the effect of prototypical apartments’ orientation on indoor thermal comfort as a case study. The appartments are in a residential building block in October 6th city in Greater Cairo, Egypt. Field measurements of indoor air temperature (Ta,in) and relative humidity (RHin) were monitored in three hour intervals in the winter season of 2013 during one week in January. Outdoor measurements for the ambient temperature and relative humidity were obtained from the Meteorological Authority in the same period. The indoor measured data of air temperature and relative humidity were used to specify the comfort zone of each apartment in different orientations in the reference case by using ASHRAE psychrometric chart. This is considered the first part of the study and the second part will be conducted in the summer season to discuss the indoor thermal comfort for the reference case. a visual survey was conducted in order to analyze the construction materials and façade features of the buildings. Personal observations, , field measurements and ASHRAE psycrometric chart analyses show that there is significant thermal discomfort inside the apartments, while changing the orientation had an insignificant effect on improving thermal conditions during the survey period
Correlation between retrofitting building evenlope and thermal improvement on social housing in hot-arid climate
No full textThe work examines the correlation between insulation retrofitting technique combined with the night purge
ventilation and indoor thermal improvement within hot-arid climate. The chosen case study is an existing
prototype residential building for a social housing project that consists of 500 thousand unit and was built
during the period from 2005 to 2011 in October 6th city in Greater Cairo. The study used IES
software to simulate the application of the combined strategy of external insulation (from local material) and
night purge ventilation to examine their effect on improving indoor thermal comfort comparing to the base
case. The simulation was conducted in all seasons (winter, summer, spring and autumn) throughout the whole
year months. Results revealed that this combined strategy is not effective in winter period as it has made an
improvement of 4.4% from the base case and 5.5% when applying external insulation only. Furthermore, this
combined strategy was significantly effective in summer period as it has improved indoor thermal comfort by
58.3% from the base case and by 10.2% when applying external insulation only. Additionally, the strategy was
not effective during spring-autumn period as it made an improvement of only 6.0% in indoor thermal
comfort comparing to the base case and of 1.9% when applying external insulation only. According to these
results, the study confirms that unlike the external insulation, the night purge ventilation as a user behavioral
strategy had the major impact on indoor thermal improvement (48.1 % comparing to the base case) during
summer for this kind of buildings in hot-arid climate
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
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
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