The production of good sound generation in the violin is a complex task that requires coordination and spatiotemporal control of bowing gestures. The use of motion-capture technologies to improve performance or reduce injury risks in the area of kinesiology is becoming widespread. The combination of motion accuracy and sound quality feedback has the potential of becoming an important aid in violin learning. In this study, we evaluate motion-capture and sound-quality analysis technologies developed inside the context of the TELMI, a technology-enhanced (...) music learning project. We analyzed the sound and bow motion of 50 participants with no prior violin experience while learning to produce a stable sound in the violin. Participants were divided into two groups: the experimental group received real-time visual feedback both on kinematics and sound quality, while participants in the control group practiced without any type of external help. An additional third group of violin experts performed the same task for comparative purposes. After the practice session, all groups were evaluated in a transfer phase without feedback. At the practice phase, the experimental group improved their bowing kinematics in comparison to the control group, but this was at the expense of impairing the sound quality of their performance. At the retention phase, the experimental group showed better results in sound quality, especially concerning control of sound dynamics. Besides, we found that the expert group improved the stability of their sound while using the technology. All in all, these results emphasize the importance of feedback technologies in learning complex tasks, such as musical instrument learning. (shrink)

The current environment of business and financial corruption in Spain has increased in recent years. In order to reduce the scope of this problem, the Spanish Criminal Code has introduced codes of conduct and ethics to encourage a new culture of respecting laws for companies and employees. An Educational Innovation Group at the University of Extremadura has proposed a cross-sectional model to study ethics, in an effort to address concerns about the consequences of illegal acts in society and companies. Students (...) in Business, Finance and Accounting are required to practice ethical decision-making through court judgments in order to develop “ethical competences”. These competences are included in the European Higher Education Area and the Official University Education in Spain, specifically in the Royal Decree 1393/2007, of 29 October through cross-sectional competences within the academic programmes. The results of the study show that a high percentage of students validate this methodology as a way of improving ethical decision-making skills at University that will be applied to future business practices. (shrink)

Auditory-guided vocal learning is a mechanism that operates both in humans and other animal species making us capable to imitate arbitrary sounds. Both auditory memories and auditory feedback interact to guide vocal learning. This may explain why it is easier for humans to imitate the pitch of a human voice than the pitch of a synthesized sound. In this study, we compared the effects of two different feedback modalities in learning pitch-matching abilities using a synthesized pure tone in 47 participants (...) with no prior music experience. Participants were divided into three groups: a feedback group receiving real-time visual feedback of their pitch as well as knowledge of results; an equal-timbre group receiving additional auditory feedback of the target note with a similar timbre to the instrument being used ; and a control group practicing without any feedback or knowledge of results. An additional fourth group of violin experts performed the same task for comparative purposes. All groups were posteriorly evaluated in a transfer phase. Both experimental groups improved their intonation abilities with the synthesized sound after receiving feedback. Participants from the equal-timber group seemed as capable as the feedback group of producing the required pitch with the voice after listening to the human voice, but not with the violin. In addition, only participants receiving real-time visual feedback learned and retained in the transfer phase the mapping between the synthesized pitch and its correspondence with the produced vocal or violin pitch. It is suggested that both the effect of an objective external reward, together with the experience of exploring the pitch space with their instrument in an explicit manner, helped participants to understand how to control their pitch production, strengthening their schemas, and favoring retention. (shrink)

Repetitive practice is one of the most important factors in improving the performance of motor skills. This paper focuses on the analysis and classification of forearm gestures in the context of violin playing. We recorded five experts and three students performing eight traditional classical violin bow-strokes: martelé, staccato, detaché, ricochet, legato, trémolo, collé, and col legno. To record inertial motion information, we utilized the Myo sensor, which reports a multidimensional time-series signal. We synchronized inertial motion recordings with audio data to (...) extract the spatiotemporal dynamics of each gesture. Applying state-of-the-art deep neural networks, we implemented and compared different architectures where convolutional neural networks models demonstrated recognition rates of 97.147%, 3DMultiHeaded_CNN models showed rates of 98.553%, and rates of 99.234% were demonstrated by CNN_LSTM models. The collected data contained sufficient information to distinguish the bowing techniques studied, and deep learning methods were capable of learning the movement patterns that distinguish these techniques. Each of the learning algorithms investigated produced high classification accuracies which supported the feasibility of training classifiers. The resulting classifiers may provide the foundation of a digital assistant to enhance musicians' time spent practicing alone, providing real-time feedback on the accuracy and consistency of their musical gestures in performance. (shrink)

El filósofo Mario Bunge ha sido el más notable investigador de la epistemología en nuestros días. Su preferencia por la ciencia y su rechazo hacia la pseudociencia son evidentes. Así, se reconoce que la filosofía de Bunge fue analítica. En consecuencia, Bunge también manifestó su desacuerdo con aquellas filosofías (en su mayoría continentales) que son anticientíficas o que no hayan promovido el estudio de la ciencia. De este modo, se analizan las razones por las que Bunge rechazó a Hegel, Husserl (...) y Heidegger. Este rechazo lleva a investigar las bases del negacionismo y la posverdad y, finalmente, se realiza un balance entre la postura de Bunge y el florecimiento de la desinformación en la actualidad. (shrink)