1,753 research outputs found
The construction of Karen Karnak: The multi-author-function
No full textThis thesis is situated within the comparatively recent developments of Web 2.0 and the emergence of interactive WikiMedia, and explores the mode of authorship within a Read/Write culture compared to that of a Read/Only tradition. The hypothesis of this study is that the role of the audience has become merged with the author, and as such, represents new functions and attributes, distinct from a more conventional concept of authorship, in which the roles of audience and author are more separate. Read/Write and participatory culture, as defined by this study, is focused on collaboration, and includes the influences of D.I.Y. culture, Open-Source practices and the production of text by multiple authors. Multi-authorship presents a re-thinking of several concepts which support the notion of the individual author, since the focus of multi-authorship is not on attribution and ownership of a finished text, but on the continued malleability of a text. Modes of multi-authorship, demonstrated in the use of the pseudonyms Alan Smithee and Karen Eliot, represent declarative authors whose names signify multiple origins, whilst concurrently indicating a distinct body of work. The function of these names form an important context to this study, since primary research involves the construction of an experimental mode of multi-authorship utilising WikiMedia technology and the interaction of thirty nine participants, who are invited to create a body of work under the collective pseudonym Karen Karnak. The data generated by this experiment is analysed using aspects of Michel Foucault's author-function to identify and determine power structures inherent in the WikiMedia context. The interplay of power structures, including concepts such as identity, ownership and the body of work, affect the resulting mode of authorship and contribute to the construction of Karen Karnak, suggesting further areas of research into the emerging multi-author
FSD-FS
No full textFSD-FS is a publicly-available database of human labelled sound events for few-shot learning. It spans across 143 classes obtained from the AudioSet Ontology and contains 43805 raw audio files collected from the FSD50K. FSD-FS is curated at the Centre for Digital Music, Queen Mary University of London.
Citation
If you use the FSD-FS dataset, please cite our paper and FSD50K.
@article{liang2022learning,
title={Learning from Taxonomy: Multi-label Few-Shot Classification for Everyday Sound Recognition},
author={Liang, Jinhua and Phan, Huy and Benetos, Emmanouil},
journal={arXiv preprint arXiv:2212.08952},
year={2022}
}
@ARTICLE{9645159, author={Fonseca, Eduardo and Favory, Xavier and Pons, Jordi and Font, Frederic and Serra, Xavier}, journal={IEEE/ACM Transactions on Audio, Speech, and Language Processing}, title={FSD50K: An Open Dataset of Human-Labeled Sound Events}, year={2022}, volume={30}, number={}, pages={829-852}, doi={10.1109/TASLP.2021.3133208}}
About FSD-FS
FSD-FS is an open database for multi-label few-shot audio classification containing 143 classes drawn from the FSD50K. It also inherits the AudioSet Ontology. FSD-FS follows the ratio 7:2:1 to split classes into base, validation, and evaluation sets, so there are 98 classes in the base set, 30 classes in the validation set, and 15 classes in the evaluation set (More details can be found in our paper).
LICENSE
FSD-FS are released in Creative Commons (CC) licenses. Same as FSD50K, each clip has its own license as defined by the clip uploader in Freesound, some of them requiring attribution to their original authors and some forbidding further commercial reuse. For more details, ones can refer to the link.
FILES
FSD-FS are organised in the structure:
root
|
└─── dev_base
|
└─── dev_val
|
└─── eval
REFERENCES AND LINKS
[1] Gemmeke, Jort F., et al. "Audio set: An ontology and human-labeled dataset for audio events." 2017 IEEE international conference on acoustics, speech and signal processing (ICASSP). IEEE, 2017. [paper] [link]
[2] Fonseca, Eduardo, et al. "Fsd50k: an open dataset of human-labeled sound events." IEEE/ACM Transactions on Audio, Speech, and Language Processing 30 (2021): 829-852. [paper] [code
The relationship between lower limb biomechanicalvariables during common screening tasks
Get PDFAbnormal lower-limb mechanics during functional activities have been reported as being associated with several knee injuries. Hence it is important to develop screening tests to identify healthy individuals who may be susceptible to knee injury and then to design individual intervention programmes. There is limited literature exploring the associations between lower-limb biomechanical variables during athletic tasks associated with knee-joint injuries. A better understanding of inter-task performance would offer insights into the consistency of motor patterns employed by healthy individuals during common screening tasks. This thesis comprises four themed studies. The first study aimed to examine the reliability of using 3D motion analysis to measure the biomechanical variables during single-leg squats (SLS), single-leg landing (SLL), running and sidestep cutting tasks. The findings of first study revealed that within-day measurements are more reliable than those between days across all tasks, while transverse-plane variables are less reliable compared to other planes of movement. The second study established reference values for lower-limb biomechanical variables during these tasks in a large population sample (90 healthy participants). Furthermore, gender differences in biomechanical variables were also assessed. Significant differences were noticed in knee-flexion, knee-valgus and hip-adduction peak angles across all tasks and both genders.The third study examined the relationships between lower-limb biomechanical variables during these tasks. A significant relationship has been reported across all tasks between the following variables: peak knee-abduction angle and moment, hip-internal and hip-adduction rotation angles. The findings support the hypothesis that those individuals who exhibit misalignment strategies, specifically in frontal and transverse planes, during SLS & SLL will also show the same movements during running and cutting tasks. However, it must be stressed that the use of squat or landing alone should not be considered as a replacement to find individuals at risk of running or cutting mechanics since several variable showed weak or no correlation.The final study aimed to examine the effectiveness of an augmented feedback protocol on SLS performance and if changing squat performance would be reflected in a change in performance in SLL, running and side-step cutting tasks. Training resulted in a significant reduction in knee-valgus angle and moment and hip-flexion angles during single-leg squatting. Additionally, these improvements remained a few days later, proposing motor patterns might have improved and these improvements would sustain, thus reducing the risk of injury in the longer time. Furthermore, significant reductions in knee-valgus angle and moment were also noticed in landing after squat feedback training, but no significant improvements were transferred to run and cut tasks.This thesis has expanded the understanding about using 3D movement-analysis systems and established reference values when performing common screening tasks. Furthermore, feedback was used to improve performance strategies, which could reduce the risk of knee injuries in a quick and easy manner. However, the results of this study do not confirm that the alterations reported in biomechanical variables were solely due to the SLS feedback-training programme
Tissue architecture of the anterior pituitary showing the epithelial cell cords with hormonal cells and folliculo-stellate (FS) cells, the capillaries (C) with fenestrated endothelial cells (EC) and connective tissue (CT)
No full text<p><b>Copyright information:</b></p><p>Taken from "Paracrinicity: The Story of 30 Years of Cellular Pituitary Crosstalk"</p><p></p><p>Journal of Neuroendocrinology 2008;20(1):1-70.</p><p>Published online Jan 2008</p><p>PMCID:PMC2229370.</p><p>© 2008 The Author. Journal Compilation © 2008 Blackwell Publishing Ltd</p> The cell cords are a cluster of endocrine cells surrounding an aggregate of FS cells that make a follicle (F). FS cells also make a meshwork between the hormonal cells, making junctions among each other (thick lines) and extending foot processes (f) ending on the basal membrane (BM) in the periphery of the cord. The cords are surrounded by BM, which may have extensions between some cells. A second BM surrounds the capillary vessels and between these two some connective tissue resides. Small and larger lacunae are present between hormonal cells. Paracrine substances may circulate from cell-to-cell but also could be released in these lacunae and reach more remote places. FS cells make gap junctions mostly among each other, but occasionally also with some hormonal cells. Hormonal cells can make interdigitations with FS cells (small arrows) to favour cell-to-cell communication. Adapted from Vila-Porcile ()
Adaptive pulse compression for transform-limited 15-fs high-energy pulse generation
Get PDFWe demonstrate the use of a deformable-mirror pulse shaper, combined with an evolutionary optimization algorithm, to correct high-order residual phase aberrations in a 1-mJ, 1-kHz, 15-fs laser amplifier. Frequency resolved optical gating measurements reveal that the output pulse duration of 15.2 fs is within our measurement error of the theoretical transform limit. This technique significantly reduces the pulse duration and the temporal prepulse energy of the pulse while increasing the peak intensity by 26%. It is demonstrated, for what is believed to be the first time, that the problem of pedestals in laser amplifiers can be addressed by spectral-domain correction
Self-compression of 4.9 µm pulses to sub-40 fs with 2 mJ energy in Zinc Sulfide
No full textNonlinear self-compression of few-cycle multi-mJ pulses at 4.9 µm in ZnS is presented. 80 fs input pulses are compressed to 37 fs with 2.1 mJ energy at a 1 kHz repetition rate. © 2024 The Author(s
Sub-40 fs Er:fiber laser
No full textSimulation and experiment results are presented for sub-40 fs pulse generation in Er: fiber ring lasers. (C) 2010 Optical Society of Americahttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000295612401079&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Engineering, Electrical & ElectronicOpticsPhysics, AppliedCPCI-S(ISTP)
Time-domain investigation of the ro-vibrational CH<sub>4</sub> v<sub>2</sub> Raman spectrum via fs/ps CRS for combustion diagnostics
No full textWith the onset of climate change it is crucial to eliminate emissions, particularly for aviation reliant on gas turbine combustion. Computational models aid combustor improvement, but experimental data needed for validation is difficult to obtain. Fortunately, laser diagnostics can now achieve non-intrusive, high-resolution combustion measurements, especially with hybrid femtosecond/picosecond (fs/ps) coherent Raman scattering (CRS). In this thesis, the goal was to develop hybrid fs/ps CRS spectroscopy for the CH4 ν2 vibrational mode. Methane merits investigation as a climate forcer alongside potential use in carbon-neutral hydrogen production. Time-resolved CRS was performed for collision-independent, collisional dephasing, and laminar CH4-air flame measurements. A time-domain model well-reproduced experiments, along with extracting molecule-specific ν2 Q-branch dephasing linewidth parameters. Additionally, fundamental physio-chemical processes were observed in a spectral molecular fingerprint region across the CH4-air flame: CH4 dissociation, H2 synthesis and consumption, mass diffusion, and fuel/oxidizer mixing.Aerospace Engineerin
La Fabrique des classiques africains: écrivains d’Afrique subsaharienne francophone . Par Ducournau Claire
No full textThis is a pre-copyedited, author-produced PDF of an article accepted for publication in French Studies following peer review. The version of record Claire H Griffiths (2018) La Fabrique des classiques africains : ecrivains d'Afrique subsaharienne francophone par Claire Ducournau, French Studies, Volume 72, Issue 2, 1 April 2018, Pages 318–319 is available online at: https://doi.org/10.1093/fs/kny023The review article evaluates major new scholarship on the development of the French literary system in colonial and postcolonial Africa and its impact on Francophone writing
The case for a symmetric reaction function of the European Central Bank
Get PDFIn a macro-economic framework where the European Central Bank targets individual country data, the nature of strategic interactions between fiscal authorities in the euro-zone can be described as a stag hunt game with (at least) two equilibria that can be pareto-ranked. In fact we show that, because of the indiscriminate nature of its monetary response, an ECB strategy of monetary retaliation to any individual countrys over-expenditure affects all eleven countries to the same extent. This collective effect is similar to the teachers old favorite all children stay behind in the class if one misbehaves. This mechanism, we show, makes the game between fiscal authorities a multiple equilibria co-ordination game. We subsequently address the problem of equilibrium selection that is of particular importance to co-ordination games. Following Kandori et al. (1993), we apply Harsanyi and Seltens (1988) riskdominance criterion to single out the conditions for fiscal restraint to emerge as the equilibrium selected by interacting actors. Our main conclusions are that the ECB can ensure convergence of fiscal authorities upon the pareto-optimal equilibrium (that is, fiscal restraint) by adopting a reward-oriented, counter-cyclical strategy that compensates fiscal authorities at the output level both for giving up fiscal discretion and for incurring the risk of being hit by a monetary tightening in response to developments elsewhere in the euro-economy. This means that interest rates' movements should smoothen economic fluctuations in order to give economic actors sufficient incentives to maintain restraint. -- In einem makroökonomischen Kontext, in dem die Europäische Zentralbank die wirtschaftlichen Daten einzelner Länder anvisiert, können die strategischen Interaktionen zwischen den Finanzbehörden der Euro-Zone als ein stag hunt- Spiel mit (mindestens) zwei pareto-Equilibrien beschrieben werden. Wir zeigen daß, aufgrund der ungezielten Art der monetären Reaktion, eine EZB-Strategie der monetären Vergeltung für zu hohe Ausgaben eines einzelnen Landes alle elf Länder gleichermaßen betrifft. Dieser Kollektiveffekt erinnert an die alte Lehrermethode: Alle Kinder müssen nachsitzen, wenn eins aus der Reihe tanzt. Dieser Mechanismus macht das Spiel zwischen den Finanzbehörden zu einem Koordinationsspiel mit mehreren Equilibrien. Anschließend befassen wir uns mit dem in Koordinationsspielen besonders bedeutsamen Problem der Wahl zwischen Equilibrien. In Anlehnung an Kandori et al. (1993) wenden wir Harsanyi und Selten's (1988) Risikodominanzkriterium an, um die Bedingungen herauszufiltern, unter denen fiskale Zurückhaltung das Equilibrium bildet, das von den beteiligten Akteuren gewählt wird. Unsere wesentlichen Schlußfolgerungen sind, daß die EZB eine Konvergenz der Finanzbehörden auf das pareto-optimale Equilibrium (d.h. fiskale Zurückhaltung) sicherstellen kann, indem sie eine auf Belohnung ausgerichte, antizyklische Strategie verfolgt, bei der die Finanzbehörden auf der Output-Ebene entschädigt werden -sowohl für die Abgabe fiskaler Entscheidungsfreiheit als auch für das Risiko, einer monetären Kontraktion ausgesetzt zu werden, die auf Entwicklungen anderswo in der Euro-Wirtschaft abzielt. Das bedeutet, daß Zinsentwicklungen wirtschaftliche Fluktuationen ausgleichen sollten, um den relevanten Akteuren ausreichende Anreize für fiskale Zurückhaltung zu bieten.
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