513 research outputs found
Impact of audio codec and quality on genre classificaton and BPM recognition in Essentia
No full textMusic Information Retrieval (MIR) is a field of research that focusses on extracting information from music related data. This includes the genre of music and the beats per minute (BPM) of a song. Pipelines that extract this information from music are called feature extractors. Essentia is a library for such feature extraction. Often, the audio codec and quality is not considered in research setups within the field of MIR, while this could have an influence on the results. Therefore the main research question is "How do different audio codecs and audio quality impact genre classification and beats per minute (BPM) recognition in Essentia?". To answer this, the genre has been narrowed down to rock and the chosen audio codecs are FLAC, MP3 LAME and OGG Voribs. In collaboration with Muziekweb, a Dutch music library that collects all music that has been released in The Netherlands, it was possible to gather music files in lossless format. To degrade the audio quality, classify songs and recognize BPM, python pipelines for codec conversion, rock genre classification and BPM recognition were created an ran on this data. It has been concluded that changes in audio codec and quality have an influence on genre classification and BPM recognition in Essentia. It has not been concluded which codec and quality is best to use in the field of MIR. Further research is needed to answer this.https://gitlab.ewi.tudelft.nl/cse3k-21q2-music-faithfulness/project-sjoerd-hulleman GitLab repository containing all code used for this research.CSE3000 Research ProjectComputer Science and Engineerin
Reconstructing palaeolandscapes in the eastern Rhine-Meuse delta (The Netherlands):Finding the starting point of the Linge channel?
Full text linkPiloted Assessment of the Lateral-Directional Handling Qualities of the Flying-V
No full textFlying wings are known for their limited lateral-directional stability and handling qualities. This study aims at assessing the lateral-directional handling qualities of a conceptual flying wing aircraft currently in development at TU Delft, the Flying-V. It focuses on two aspects: First assess the lateral-directional handling qualities of the bare-airframe Flying-V, and the compliance to quantitative requirements. Second, improve these handling qualities through a prototype flight control system, and assess its effect on the handling qualities and the requirement compliance. These assessments were performed both analytically and with a pilot-in-the-loop experiment, in order to experimentally validate analytical findings and obtain new pilot-subjective insights. The analytical and experimental assessment both show the lateral-directional handling qualities of the Flying-V to be insufficient for requirement compliance, due to a lack of pitch, roll and yaw control authority in low-speed flight conditions and an insufficiently stable Dutch Roll eigenmode. The prototype flight control system, consisting of an adapted control allocation and a stability augmentation system, showed both analytically as experimentally to improve the control authority, stability, and handling qualities of the Flying-V. While the effect on the lateral-directional stability was sufficient for stability requirement compliance, the control authority was not sufficiently increased for manoeuvrability requirement compliance. Thus, a challenge remains to improve the handling qualities of the Flying-V. An approximation of the control authority required for full requirement compliance in the flight conditions tested showed a control authority increase of over a factor four to be required for future control surface design.Flying-VAerospace Engineerin
Practical Ecclesiology for a Pilgrim Church: The Theological Motives behind Healy's Ethnographic Turn
No full textIn recent years, several theologians have argued that ecclesiology can benefit from the method of ethnography, which would make it less systematic and less rigid. This argument can be found, for example, in Nicholas M. Healy's Church, World and the Christian Life. This article analyses how Healy views ethnography as a possible ecclesiological method, and to what extent he prefers this method over other methods. While Healy suggests that ethnography might be helpful for ecclesiology in general, it will be claimed that his argument in fact assumes and advances a specific pilgrim ecclesiology and a postmodern epistemology. Furthermore, his attempt to push ecclesiology in a more ethnographic direction is weakened by a misinterpretation of older, systematic, so-called 'blueprint' ecclesiologies. The article concludes by arguing that, in the secular Western context, ethnography can indeed be a useful ecclesiological tool, as long as it is more explicit about its own theological position than Healy is
Henri de Lubac’s wending naar de kerk
No full textIn the last thirty years, theologians such as Milbank and Hauerwas have allowed ecclesiology to play a fundamental role in theology. This move is grounded in their conviction that the meaning of Christianity consists primarily not in its theory and doctrine but in its lived form, which is the church. Interestingly, this contemporary 'turn to the church' in many ways resembles an earlier revival of ecclesiology in the beginning of the twentieth century in Roman Catholic theology. In this paper, I will focus on the work of Henri de Lubac, and demonstrate how the particular way in which he develops his idea of the church might offer valuable insights for contemporary theology. First, I sketch how his particular understanding of the church as the social and historical embodiment of God's gracious action immediately implied an embrace of the social and historical world. Second, I argue that notwithstanding all his emphasis on the church, his particular understanding of the church as springing from the Eucharist means that the church is never idolized but always points beyond itself to God. I conclude by relating these insights to the contemporary turn to the church
Correction to: The ankle cartilage cascade: incremental cartilage damage in the ankle joint (Knee Surgery, Sports Traumatology, Arthroscopy, (2021), 29, 11, (3503-3507), 10.1007/s00167-021-06755-w)
No full textThe article “The ankle cartilage cascade: incremental cartilage damage in the ankle joint” written by Jari Dahmen, Jon Karlsson, Sjoerd A. S. Stufkens and Gino M. M. J. Kerkhoffs, was originally published online on 05 October 2021 with Open Access under a Creative Commons Attribution 4.0 International License. After publication in volume 29, issue 11, page 3503–3507 the author(s) decided to cancel the Open Access. Therefore, the copyright of the article has been changed on 03 December 2021 t
[Review of the book Het uitschot en de geest. Paulus onder theologen, Gert-Jan van der Heiden, 2018]
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