1,720,972 research outputs found
Study of the behaviour of the shutter prototype for non-residential, aimed at containing the summer heating load
No full textThis research aims at realising a shutter prototype which would allow the containment of the summer heating load in non-residential buildings.
The prototype will be constructed with glass-block and will overhang the façade. It will be parallelepiped shaped; furthermore, it will have an isosceles section with the larger base positioned at the top of the hole forming, thus, a plan perpendicular to the façade and overhanging by 0,40 cm.
With its positioning at the height of the envisaged holes and its particular geometrical shape, this prototype will replace the standard vertical shutter with one containing glass-block with a sharp inclination with respect to the incidence of the sun rays in the summer time.
A measurement campaign is envisaged in order to optimize the glass inclination with respect to the incidence of the sun rays both during the winter and the summer time and the width of the horizontal anti-dazzle screen placed at the top of the shutter.
The objectives of this research are:
- Minimising overheating during the summer through the inclination of the glass surface;
- Reaching a high level of visual comfort;
- Realising a monitored natural ventilation.
The horizontal overhang surfaces of the shutter will be equipped with a series of holes controlled by a system of rotating thin plates which, once positioned vertically, will allow the proper circulation of air and a further source of natural light.
Furthermore, the geometrical shape of this prototype allows for the control of te shades; the holes on the higher and lower horizontal surfaces will guarantee a natural ventilation so to ensure the proper level of air moisture.
The lack of mobile or steady anti-dazzle screens ensures a perfect view of the external surroundings; in addition to this, the standard levels envisaged for by the existing regulations on natural lighting on the back wall will not be altered.
The aim of this work is that of providing a passive element which could concretely guarantee a high level of acoustic and visual comfort, and a proper ventilation in indoor non-residential environments
Bioclimatic design, assisted by numerical simulation in a transient state
Full text linkThe bioclimatic design aims to realize designing, localizative technological, plant-engineering choices, in order to have a housing model that satisfies comfort requisites through microclimate passive control and the control of the energy for heating plants. The study in this field is booming and, thanks to fast and effective calculation systems, the researchers can achieve reliable outcomes in reasonable times. Starting by a good thermal-energetic design and a bit of intuition, the bioclimatic design issue has been tackled scientifically and sistematically. So, we reached spe-cific and general conclusions useful to quantify and select the most used technics in this field. Our work doesn’t aim at a strict demonstration but at a study through which verify, understand and in-crease the knowledge of thermal-energetic phenomenon of building-environmental interaction. Many of the simulations in transient state have been made on matters we considered the most influential on the global behaviours of residential buildings. The matters on which we focused are: thermal cover (ther-mal insulation and inertia), glazed surfaces, screenings (static and mobile), in direct geothermal energy, vent (natural and artificial, diurnal and nocturnal). All this work has the aim to create the right balance between naatural cooling and heating during a while year, in order to guarantee thermal comfort to residents, thereby decreasing to a minimum the use of plants during the summer and the winter. The consequent designing-technical choices come from scrupulous interpretation of the outcomes, achieved by extrapolating from generic treatment the compatibility with the climatic conditions. In this per-spective, the authors, with the research, are using their knowledges to get innovative outcomes and integrate the research with empirical matters. residential buildings. The matters on which we focused are: thermal cover (ther-mal insulation and inertia), glazed surfaces, screenings (static and mobile), in direct geothermal energy, vent (natural and artificial, diurnal and nocturnal). All this work has the aim to create the right balance between naatural cooling and heating during a while year, in order to guarantee thermal comfort to residents, thereby decreasing to a minimum the use of plants during the summer and the winter. The consequent designing-technical choices come from scrupulous interpretation of the outcomes, achieved by extrapolating from generic treatment the compatibility with the climatic conditions. In this per-spective, the authors, with the research, are using their knowledges to get innovative outcomes and integrate the research with empirical matters
Solar cooling: a case study
Full text linkThroughout the years various methods for heat prevention and indoor temperatures control in
the summer have been used. The alternative cooling strategies are based on various passive and low
energy cooling technologies for protection of the buildings via design measures or special components
to moderate the thermal gains, or to reject the excess heat to the ambient environment. All these
techniques aim to reduce summer cooling loads and electricity demand for air conditioning. During
the summer the demand for electricity increases because of the extensive use of heating ventilation air
conditioning (HVAC) systems, which increase the peak electric load, causing major problems in the
electric supply. The energy shortage is worse during ‘dry’ years because of the inability of the
hydroelectric power stations to function and cover part of the peak load.
The use of solar energy to drive cooling cycles for space conditioning of most buildings is an
attractive concept, since the cooling load coincides generally with solar energy availability and
therefore cooling requirements of a building are roughly in phase with the solar incidence. Solar
cooling systems have the advantage of using absolutely harmless working fluids such as water, or
solutions of certain salts. They are energy efficient and environmentally safe.
The purpose of this paper is to describe a Solar Cooling System to be installed on the roof of a
building in Rome, the headquarters of the State Monopoly. The medium size power plant is composed
of the following components:
− Solar Collectors;
− Thermal Storage Tank;
− Absorption Chiller;
The plant design is based on a dynamic simulation in TRNSYS, a dynamic simulation tool used
by engineers all over the world to make energy calculations in a transient state
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
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