1,720,966 research outputs found
Improving Search Relevance Feedback through Human Centered Design
No full textArtificial intelligence (AI) is expected to play a transformational role in health and wellbeing. Search (i.e. information retrieval) technologies already play a significant role in healthcare research and practice. Relevance feedback in Search is vital for system evaluation and improvements. However, in small user scale contexts, the exploitation of user behaviors may not infer valid relevance judgments. Therefore, engaging users to provide such feedback explicitly is essential for improving search performance (i.e. effectiveness). However, previous research has found that users are generally reluctant to provide explicit feedback in digital environments, and the willingness decreases overtime in some experiments. In collaboration with myTomorrows, an Amsterdam-based pharma-tech company, this Master thesis aims to find answers to the challenge mentioned above through a specific context of myTomororws AI-powered treatment Search which has the urgent need for engaging healthcare professionals (HCPs) in providing relevance feedback on search results (e.g. Clinical Trials and Expanded Access Programs) for system evaluation and improvements. Through Human Centered Design methods such as interviews, observations, and speed dates, the project yielded a future myTomorrows Search design enhanced with three relevance feedback collection concepts. As research materials, the concepts were tested and evaluated by nine HCPs from three countries (the Netherlands, China, and Brazil). The user study results indicate that embedding utility, as the motivator, in relevance feedback collection appeals to HCPs more than using motivators such as altruism or enjoyment. Moreover, the best point of user engagement is identified as the moment between users finishing the examination of information and starting the next ones. Additionally, this study generalized the project process and user study insights into a four-stage guide for designing explicit feedback collection in text-base Search. Although it remains unvalidated, this guide has the potential to apply to other small user scale contexts, guiding or inspiring user researchers and designers to design explicit user feedback collection in Search.Design for Interactio
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
Wide area kinematic positioning with BeiDou triple frequency signals
No full textA key challenge of wide area kinematic positioning is to overcome the effects of the varying hardware biases in code signals of the BeiDou system. Based on three geometryfree/ionosphere-free combinations, the elevation-dependent code biases are modelled for all BeiDou satellites. Results from the data sets of 30-day for 5 baselines of 533 to 2545 km demonstrate that the wide-lane (WL) integer-fixing success rates of 98% to 100% can be achieved within 25 min. Under the condition of HDOP of less than 2, the overall RMS statistics show that ionospheric-free WL single-epoch solutions achieve 24 to 50 cm in the horizontal direction. Smoothing processing over the moving window of 20 min reduces the RMS values by a factor of about 2. Considering distance-independent nature, the above results show the potential that reliable and high precision positioning services could be provided in a wide area based on a sparsely distributed ground network
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
Assessment of code bias variations of BDS triple-frequency signals and their impacts on ambiguity resolution for long baselines
No full textCarrier phase ambiguity resolution over long\ud
baselines is challenging in BDS data processing. This is\ud
partially due to the variations of the hardware biases in\ud
BDS code signals and its dependence on elevation angles.\ud
We present an assessment of satellite-induced code bias\ud
variations in BDS triple-frequency signals and the ambiguity\ud
resolutions procedures involving both geometry-free\ud
and geometry-based models. First, since the elevation of a\ud
GEO satellite remains unchanged, we propose to model the\ud
single-differenced fractional cycle bias with widespread\ud
ground stations. Second, the effects of code bias variations\ud
induced by GEO, IGSO and MEO satellites on ambiguity\ud
resolution of extra-wide-lane, wide-lane and narrow-lane\ud
combinations are analyzed. Third, together with the IGSO\ud
and MEO code bias variations models, the effects of code\ud
bias variations on ambiguity resolution are examined using 30-day data collected over the baselines ranging from 500 to 2600 km in 2014. The results suggest that although the effect of code bias variations on the extra-wide-lane integer solution is almost ignorable due to its long wavelength, the wide-lane integer solutions are rather sensitive to the code bias variations. Wide-lane ambiguity resolution success rates are evidently improved when code bias variations are corrected. However, the improvement of narrow-lane ambiguity resolution is not obvious since it is based on geometry-based model and there is only an indirect impact on the narrow-lane ambiguity solutions
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
- …
