Search results for "Computer science"
showing 10 items of 22367 documents
TISSBERT: A benchmark for the validation and comparison of NDVI time series reconstruction methods
2018
[EN] This paper introduces the Time Series Simulation for Benchmarking of Reconstruction Techniques (TISSBERT) dataset, intended to provide a benchmark for the validation and comparison of time series reconstruction methods. Such methods are routinely used to estimate vegetation characteristics from optical remotely sensed data, where the presence of clouds decreases the usefulness of the data. As for their validation, these methods have been compared with previously published ones, although with different approaches, which sometimes lead to contradictory results. We designed the TISSBERT dataset to be generic so that it could simulate realistic reference and cloud-contaminated time series …
Teoría de la educación : educación y cultura en la sociedad de la información
2011
Se exponen las principales perspectivas en el estudio del comportamiento informacional: la perspectiva del usuario y la del sistema. En el primer caso, se asume una visión global del proceso de búsqueda de información y se desarrollan modelos teóricos y metodológicos para guiar la investigación en este campo. Se presentan como ejemplo la teoría del Sense-Making de Brenda Dervin y el modelo de Proceso de Búsqueda de Información de Carol Kuhlthau. En el segundo caso, se asume una perspectiva parcial del proceso de búsqueda de información, centrándose fundamentalmente en las transacciones entre usuario y el sistema o entre el usuario y la información. Se describen los estudios del uso de recur…
Students’ Experiences of Reflective Writing as a Tool for Learning in Physiotherapy Education
2015
The purpose of this study was to examine physiotherapy students’ experiences of reflective writing. The students (n = 32) were asked to video record their practical activities at school and at workplaces, and to write reflective journals on their experiences. The research data about students’ experiences of reflective writing were collected by interviewing the students. The data were analyzed phenomenographically. The findings revealed four qualitatively different experiences of reflective writing: 1) writing as a useless task; 2) writing as a tool for deepening understanding; 3) writing as a tool for self-reflection; and 4) writing as a tool for professional development. These categories d…
Register Variation in Electronic Business Correspondence
2011
Electronic correspondence is a highly dynamic genre within the business world in which Register Variation (RV) is frequently used as a tool to improve communication but it often can lead to misunderstanding. In order to shed some light on this still unexplored area, the present study firstly offers a practical approach to classify and analyse RV within professional communication. After this, it reviews previous studies on email writing to apply their findings to this approach and, in the third part of the study, a corpus of recent business emails in English is analysed to examine how the key parameters of RV are currently used within this genre. The results will show that, not only the cont…
Active disturbance rejection control of linear induction motor
2017
This paper proposes the theoretical framework and the experimental application of the active disturbance rejection control to linear induction motors. Such a nonlinear control (ADRC) technique can be viewed as a particular kind of input-output linearization control, where the nonlinear transformation of the state is not computed by means of the model, but it is estimated online. Such an approach permits to cope with unmodelling dynamics, as well as uncertainty in the knowledge of the model parameters and exogenous disturbances. The effectiveness of the proposed ADRC control law has been verified both by numerical simulations and experimentally on a suitably developed test setup. Moreover, t…
Toward farm-level health management of wind turbine systems: status and scope for improvements
2018
An outline of health management for OWFs has been detailed in this chapter with description of various important elements. The need for such farm level management is explained and benefits are discussed. Key gaps to be filled in order to realize such a system are identified. The proposed health management system is mainly based on the existing knowledge of fleet-level management in the aerospace sector. Health management is much broader than CM; there are a number of aspects beyond the prognostics capabilities that are to be designed in order to arrive at a comprehensive maintenance management scheme. A comprehensive maintenance program that is sensitive to the health of the assets and adap…
Coordinating action in technology-supported shared tasks: Virtual pointing as a situated practice for mobilizing a response
2021
Drawing on recordings of remote screen-based work meetings in Finland, this conversation analytic study investigates interactive properties of mouse cursor movements in technology-mediated shared tasks. The article illustrates how participants rely on features afforded by the input device in ways that divert from its pre-designed functions to accomplish virtual pointing gestures. These gestures serve as an organizational resource in the precursory phase of action, i.e. when a next on-screen action is observably made relevant. In this sequential environment, pointing by means of the tool is a collaborative resource: an embodied practice for sustaining co-orientation and advancing the sequent…
Fault diagnosis of induction motors broken rotor bars by pattern recognition based on noise cancelation
2014
Current signal monitoring (CSM) can be used as an effective tool for diagnosing broken rotor bars fault in induction motors. In this paper, fault diagnosis and classification based on artificial neural networks (ANNs) is done in two stages. In the first stage, a filter is designed to remove irrelevant fault components (such as noise) of current signals. The coefficients of the filter are obtained by least square (LS) algorithm. Then by extracting suitable time domain features from filter's output, a neural network is trained for fault classification. The output vector of this network is represented in one of four categories that includes healthy mode, a 5 mm crack on a bar, one broken bar, …
Selecting the special or choosing the common? A high-powered conceptual replication of Kim and Markus’ (1999) pen study
2022
Kim and Markus (1999) found that 74% of Americans selected a pen with an uncommon (vs. common) color, whereas only 24% of Asians made such a choice, highlighting a pronounced crosscultural difference in the extent to which people opt for originality or make majority-based choices. The present high-powered study (N = 729) conceptually replicates the results from Kim and Markus (1999; Study 3). However, our obtained effect size (r = .12) is significantly weaker than that of the original study (r = .52). Interestingly, given the globalization of mass media and the rapid economic progress of many Asian cultures during the last decades, a larger proportion of Chinese, but not American, participa…
Ergonomie des documents numériques
2001
14 pages; International audience; Le problème de l'ergonomie des documents numériques est crucial et répond à une insatisfaction fréquente des utilisateurs quant à l'usage de ce type de document. La conception de documents numériques est souvent basée sur des considérations empiriques issues des savoir-faire acquis avec le support papier. Pourtant, une abondante littérature, il est vrai dispersée dans différents champs de recherche, concerne les effets des facteurs de présentation des informations sur écran, tant au niveau perceptif qu'au niveau cognitif. Nous présentons ici une revue des principaux résultats et leurs implications concernant la conception de documents numériques. Les docume…