1,982 research outputs found
ELENA FS vibration test report
No full textELENA FS (part of SERENA package for Bepi Colombo mission to Mercury) has been refurbished.
Vibration test has been planned to validate the insturment before ESA delivery. This document reports ELENA FS vibration test: selected test are resonance research and comparison with
the resonance spectra obtained at previous vibration test in November 201
Poster Colombo-Manni.pdf
No full text
This study demonstrated that the
automated GPC/SPE purification system is able to satisfy the official EN 1948 2
method specifications and performances It fits the purposes of the
determination and quantification of PCDD/Fs in long term samples obtained from
MSWI. Furthermore can be considered a good time saving clean up system, able to
support MSWI control strategy for PCDD/F emissions, in order to minimize their
levels and their impact on the surrounding environment.PCDD/Fs, Long term environmental monitoring, gel permeation chromatography, dioxin, extracts purification
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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
Maldives: An archipelago that burns. A first survey of PCDD/Fs and DL-PCBs from human activities
No full textDue to its geographical peculiarities, the Republic of Maldives represents a case study of great interest for the investigation of persistent organic pollutants, from both a socio-economic and an ecological perspective. Thus, we conducted a first survey to assess the current status of polychlorinated dibenzo-p-dioxin (PCDD), polychlorinated dibenzofuran (PCDF) and dioxin-like polychlorinated biphenyl (DL-PCB) concentrations in Maldivian soils. The range for PCDD/F and DL-PCB soil concentrations was 0.01–49.3 pg WHO2005-TEQ g− 1 and 0.01–3.69 pg WHO2005-TEQ g− 1 dw respectively. PCDD/F concentrations exceeding several international soil guidelines were found in samples from locations in the proximity of local waste combustion sources. DL-PCB concentrations were lower than PCDD/Fs and comparable to those in previous reports from background areas and in areas with developing industrial and agricultural activities. PCDD/F and DL-PCB levels (expressed as WHO2005-TEQ) in soils were strongly correlated (r = 0.89), which suggests that, in most of the sites, they are originated from the same emission sources. Results indicate that PCDD/F soil concentrations (expressed as WHO2005-TEQ) tend to decrease with the distance from the local pollution sources. Principal component analysis (PCA) showed that PCDD/Fs in the most polluted locations are mainly generated by waste combustion. These findings highlight the need for immediate changes in waste management policies in the Archipelago, in order to reduce the release of Persistent Organic Pollutants (POPs) in the fragile local environment.JRC.H.3 - Forest Resources and Climat
Bacterial profile and antibiotic susceptibility pattern of adult lower respiratory tract infections in Colombo, Sri Lanka
No full textIntroduction: Lower respiratory tract infections (LRTIs) remain the deadliest communicable disease around the world. This study was conducted to identify the bacterial etiology of LRTIs among patients who attended the Central Chest Clinic in city of Colombo, Sri Lanka and their antibiotic susceptibility profile to enable clinicians to take decisions on effective empirical antibiotics.
Methods: Sputum samples were collected from 1,372 patients over the age of 18 years with suspected LRTIs during the year 2015. The samples were collected and processed according to standard laboratory procedures at the microbiology laboratory of the Medical Research Institute of Sri Lanka.
Results: Most of reports (58%) were from patients diagnosed with infective exacerbations of chronic lung diseases. Out of all sputum cultures processed, 404 (29.4%) resulted positive for pathogenic bacterial organisms. Coliforms (n = 176, 43.6%), and Pseudomonas aeruginosa (n = 117, 29%) were the most common
isolated bacteria, followed by Moraxella (n = 47, 11.6%), Haemophilus influenzae (n = 23, 5.7%), and Streptococcus pneumoniae (n = 18, 4.4%). The two most common bacteria isolated showed a high sensitivity for co-amoxyclav, quinolones, 3rd generation cephalosporins, carbapenems and aminoglycosides, while coliforms were highly resistant (98%) to ampicillin. S. pneumoniae showed a high resistance for penicillin
(67%) and erythromycin (61%), while Haemophilus showed a good sensitivity to co-amoxyclav (96%). There was no significant correlation between rainfall and proportions of coliforms (r = - 0.152, P = 0.638) and Pseudomonas (r = 0.271, P = 0.395) during the year.
Discussion and Conclusion: In our study, the most predominant pathogens recovered from LRTIs were P. aeruginosa and coliforms (Klebsiella spp.) as Gram negative, and S. pneumoniae as Gram positive bacteria. Co-amoxyclav, 3rd generation cephalosporins, quinolones and all second line antibiotics tested were the most efficient antibiotics in treatment of LRTIs, differently from ampicillin, erythromycin and penicillin that were not efficient antibiotics in treating this disease in our locality
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
No full textWe 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
An element-based formulation for ES-FEM and FS-FEM models for implementation in standard solid mechanics finite element codes for 2D and 3D static analysis
No full textEdge-based and face-based smoothed finite element methods (ES-FEM and FS-FEM, respectively) are modified versions of the finite element method allowing to achieve more accurate results and to reduce sensitivity to mesh distortion, at least for linear elements. These properties make the two methods very attractive. However, their implementation in a standard finite element code is nontrivial because it requires heavy and extensive modifications to the code architecture. In this article, we present an element-based formulation of ES-FEM and FS-FEM methods allowing to implement the two methods in a standard finite element code with no modifications to its architecture. Moreover, the element-based formulation permits to easily manage any type of element, especially in 3D models where, to the best of the authors' knowledge, only tetrahedral elements are used in FS-FEM applications found in the literature. Shape functions for non-simplex 3D elements are proposed in order to apply FS-FEM to any standard finite element.IMA
Impact of capital structure on working capital management: evidence from capital goods sector in Colombo stock exchange
No full textThis study is intended to examine the impact of Capital Structure on Working Capital
Management, an application on Capital goods companies listed in Colombo Stock Exchange.
Data for the study is collected from 145 annual reports which are related to 29 Capital goods
companies listed in Colombo Stock Exchange for five years from 2014 to 2018.Capital Structure
is used as independent variable for the study while Working Capital Requirement (WCR) is used
as the dependent variable. Controlling variables of this study are Firm Size (FS) and Return on
Equity (ROE). Regression analysis is used for hypothesis testing. The result of this study shows
that Debt to Equity ratio has a negative and significant impact on Working Capital Requirement
from regression analysis. Finally, researchers conclude that there is a significant negative impact
of Capital Structure on Working Capital Management of Capital goods companies in Sri Lanka
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