1,720,959 research outputs found
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
De ontwikkeling van een digitale trainer voor de Koppejan Methode in Maple TA
No full textDe titel van dit onderzoek: “De ontwikkeling van een digitale trainer voor de Koppejan methode in Maple TA”, geeft in één zin kort de drie hoofdaspecten van dit onderzoek weer. Dit onderzoek is namelijk gericht op het implementeren van de Koppejan methode in de oefen- en toets omgeving van Maple TA. Daarnaast is het gewenst om de berekening geheel automatisch te kunnen laten draaien, waarbij het zo gebouwd is dat zowel de sondering als de variabelen random gegenereerd worden, zodat elke student een unieke opgave te zien krijgt. Tot slot is het hierbij ook de bedoeling dat het systeem de mogelijkheid biedt de student te trainen tijdens het oefenen. Dit kan door middel van tips en hints of door het bieden van verwijzingen naar de bijbehorende theorie.Om dit te bereiken zijn Excel en de programmeertaal Python gebruikt voor het leggen van de basis van de berekening. Hierin zijn synthetische sonderingen geplot en is in Python een gemiddelde conusweerstand in het eerste afschuifvlak van een paal berekend. Dit is gerealiseerd door tussen de datapunten van de sondering, lineair te interpoleren naar een discreet aantal elementen van de grondlaag.In Maple TA is vervolgens geprobeerd dit proces op dezelfde manier te implementeren. In de omgeving van Maple TA op het web zijn vragen opgesteld aan de hand van de formules en variabelen, afkomstig uit de methode van Koppejan. Ook hier is een synthetische sondering tot stand gekomen. Het werken met datastructuren bleek in Maple TA echter lastig in gebruik vergeleken met Python. In verband met het tijdsbestek van het Bachelor Eindproject en het complexiteit is het helaas niet gelukt een complete berekening te coderen en tot voltooiing te brengen.Het is daarentegen wel gelukt om in Python de gemiddelde conusweerstand in het eerste overgangsgebied te bepalen. Hier kan een geheel willekeurige sondering gemaakt worden waarbij zowel numeriek als grafisch de conusweerstand bepaald kan worden. Aangezien bij de berekening een discreet aantal elementen is gebruik, kan de gemiddelde conusweerstand zeer nauwkeurig worden berekend
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
Structural Window Design for In-plane Seismic Strengthening: Numerical Predictions of Strengthening Unreinforced Masonry Structures in Groningen
No full textIn recent decades, gas production has caused numerous human-induced shallow earthquakes in the province of Groningen, The Netherlands. The buildings in this area were not designed for these unexpected earthquake loads and have shown to be vulnerable. However, current strengthening measures are considered to be time-consuming, expensive, and a great hindrance to the residents. Consequently, the question rises whether unconventional strengthening measures can offer relatively simple and quick-to-implement alternatives. This thesis researches if replacing existing windows by structural windows could provide an effective strengthening alternative. The structural window design aims to increase the in-plane seismic force capacity of an existing masonry structure by utilising the glass pane as a structural element. The structural window is designed to be composed of a timber frame, a semi-rigid adhesive, and a double glazing unit. The structural layer of the double glazing unit has a thickness of 20mm and is composed of two laminated annealed glass panes with equal thickness. The potential of the structural window is investigated in various numerical studies, using DIANA FEA 10.2. The numerical studies are split into validation studies and seismic strengthening predictions. In the validation studies, results from numerical models are compared to and validated against experimental results reported in literature. Subsequently, the potential of the structural window is assessed by seismic strengthening predictions that combine and extrapolate the validation studies. A mass proportional one-directional monotonic pushover loading scheme is adopted. The seismic strengthening predictions address masonry walls and one type of terraced house (Dutch: “Rijtjeshuis") with two rigid floors, masonry spandrels, and two large windows in the front façade wall. The numerical strengthening predictions of the masonry walls and the terraced house indicate that a structural window improves the in-plane seismic performance significantly. It is found that strengthening not only greatly increases the seismic force capacity, but also reduces the expected damage. For example, the strengthened terraced house with openable window sections reaches 205% of the seismic force capacity of the unstrengthened terraced house. Furthermore, it is found that the stress levels in the glass pane are expected to remain well below the stress levels at the onset of glass cracking. The numerical strengthening predictions are promising. Therefore, it is recommended to validate these numerical predictions with an experimental testing campaign.Civil Engineering | Building Engineerin
Assessment of Plastic Waste as Thermal Insulation in the Tropical Climate of Lagos, Nigeria
No full textWaste management in Lagos State is an unrelenting issue as the population increases exponentially per annum; there is a constant struggle with organization, transportation, and disposal of the daily waste generated per capita within the city. Of the waste generated in households in Lagos, plastic makes up a large percent of the non-organic waste found in dwellings. Waste from residences often end up pooling by the street side, and recycling is slow in gaining traction within the city. In addition, tropical cities like Lagos use HVAC systems to deal with high temperatures; this gives rise to high energy consumption in dwellings and offices alike. This is noteworthy because high energy consumption usually translates to energy expenses and in this city, with a population of 22 million, about 8.5% live in poverty with the middle-income earners toeing the line. Although a passive strategy like the use of thermal mass in buildings could improve energy efficiency, it is deemed more effective in regions with a significant difference in diurnal temperatures (>10°C). In Lagos state, however, there is no such significant range in temperatures. This served as the motivation for the inclusion of another strategy to support what is already existing – thermal insulation. This study explored the impact of thermal insulation made from plastic waste on energy savings and energy costs with the aid of DesignBuilder used to model dwellings with the climatic conditions of Lagos state. The focus of this study was on middle-class citizens in Lagos State and a survey was conducted using an online tool called Survicate, to assess their perception of the use of plastic waste on their facade. From the data, it was deduced that there is a possibility that people are willing to use plastic waste as thermal insulation when they are aware of the reduction of energy costs. For this study, five variations of thermal insulation were constructed, and experiments were carried out with the use of a hotbox to determine the thermal conductivity of these samples. The first sample was made from PET bottles with its cavity filled with textile waste; the second sample, a mould created from melted PET plastic that had been cut into tiny bits; the third variant was constructed from PET bottles with its cavity filled with water sachets (LDPE); the fourth sample, was built from crushed PET bottles and water sachets; and the last sample was made from empty PET bottles stacked on top of one another. The test sample with the least capability produced an expense reduction of N774.36/m2.year (€1.94/m2.year), while the best performing had a cost reduction of N1100.57/m2.year (€2.75/m2.year). Regardless of which insulation sample is applied, there would be savings in energy consumption, the cooling load demand of RAC (residential air-conditioning) systems would also decline, and there would be monetary savings as well. Resulting from the study’s outcome, it was recommended that a physical model be built in Lagos State to be studied further to see how well the materials perform under the actual climatic conditions in Lagos.Civil Engineerin
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