1,720,956 research outputs found
On Motion Blur and Deblurring in Visual Place Recognition
Get PDFVisual Place Recognition (VPR) in mobile robotics enables robots to localize themselves by recognizing previously visited locations using visual data. While the reliability of VPR methods has been extensively studied under conditions such as changes in illumination, season, weather and viewpoint, the impact of motion blur is relatively unexplored despite its relevance not only in rapid motion scenarios but also in low-light conditions where longer exposure times are necessary. Similarly, the role of image deblurring in enhancing VPR performance under motion blur has received limited attention so far. This letter bridges these gaps by introducing a new benchmark designed to evaluate VPR performance under the influence of motion blur and image deblurring. The benchmark includes three datasets that encompass a wide range of motion blur intensities, providing a comprehensive platform for analysis. Experimental results with several well-established VPR and image deblurring methods provide new insights into the effects of motion blur and the potential improvements achieved through deblurring. Building on these findings, the letter proposes adaptive deblurring strategies for VPR, designed to effectively manage motion blur in dynamic, real-world scenarios
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
Equity research: Deutsche Lufthansa AG
No full textLufthansa is one of the leading European Airlines. The company is involved in business activities such as air passenger transportation, air cargo transportation, Maintenance, Repair and Overhaul and other additional activities like IT services, flight personnel training, travel agencies and others. This report issues a HOLD recommendation with a 2025YE price target of €8.3/Sh., using a DCF model, with an upside potential of 23.2% in 15 months, corresponding to an annualized return of 18.1%, against the closing price of €6.71/Share, as of October 1, 2024, with a high risk. The upside potential of the company is mainly explained by the expected increase in demand for air travel and MRO market in the next years. Lufthansa, in turn, has all the tools and potential to grow along with the market. The main valuation model to sustain the investment was the Free Cash Flows to the Firm model, using WACC as the discount rate. Additional absolute valuations models were computed, including FCFE, APV and Residual Income as well as several Multiples Based Valuations, to stress the Price Target determined. Deutsche Lufthansa AG operates in a volatile market that is strongly dependent on external macroeconomic factors. The investment main risks are the fuel prices fluctuations, inflation and economic crisis. The company value is highly sensitive to these factors.A Lufthansa é uma das principais companhias aéreas da Europa. O grupo está envolvido em várias atividades comerciais como transporte aéreo de passageiros, transporte aéreo de carga, serviços de manutenção, reparo e revisão e também outras atividades nos setores de serviços de IT, formação de tripulantes e técnicos, agências de viagens e entre outras. Este relatório emite uma recomendação HOLD com um preço-alvo para final de 2025 de 8.3€/ação, utilizando o modelo DCF, com um potencial de valorização de 23.2% em 15 meses, correspondendo a 18.1% de valorização anual face ao preço de fecho de 6.71€/ação à data de 1º de Outubro de 2024, com alto risco de investimento. O potencial de valorização da empresa é explicado principalmente pela expectativa do mercado no aumento da procura de viágens aéreas e crescimento do mercado de MRO nos próximos anos. A Lufthansa, por sua vez, tem todas as ferramentas e o potencial para crescer junto com o mercado. O principal modelo de avaliação utilizado para sustentar a recomendação de investimento foi o Free Cash Flows to the Firm, utilizando o WACC como taxa de desconto. Foram utilizados outros métodos de avaliação como o FCFE, APV e Residual Income, assim como os Múltiplos de empresas pares. A Deutsche Lufthansa AG opera num mercado volátil que tem muita dependência de fatores macroeconómicos externos. Os principais riscos associados ao investimento são a flutuação dos preços dos combustíveis, a inflação, e a crise global. O valor da empresa é então altamente sensível a estes fatores.info:eu-repo/semantics/publishedVersio
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
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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