Last 7 days
Bookmark and Share    
Full Text
See detailApproximation of Riemannian measures by Stein’s method
Thompson, James UL

E-print/Working paper (2020)

Detailed reference viewed: 63 (2 UL)
Full Text
Peer Reviewed
See detailHow working memory capacity and shifting matter for learning. A replication study using worked examples
Bichler, S; Schwaighofer, M; Stadler, M et al

in Journal of Educational Psychology (2020), 112

Detailed reference viewed: 59 (0 UL)
Full Text
Peer Reviewed
See detailA review of studies exploring fetal alcohol spectrum disorders through eye tracking measures.
Maurage, Pierre; Bollen, Zoé; Masson, Nicolas UL et al

in Progress in neuro-psychopharmacology & biological psychiatry (2020), 103

The widespread cognitive and cerebral consequences of prenatal alcohol exposure have been established during the last decades, through the exploration of fetal alcohol spectrum disorders (FASD) using ... [more ▼]

The widespread cognitive and cerebral consequences of prenatal alcohol exposure have been established during the last decades, through the exploration of fetal alcohol spectrum disorders (FASD) using neuropsychological and neuroscience tools. This research field has recently benefited from the emergence of innovative measures, among which eye tracking, allowing a precise measure of the eye movements indexing a large range of cognitive functions. We propose a comprehensive review, based on PRISMA guidelines, of the eye tracking studies performed in populations with FASD. Studies were selected from the PsycINFO, PubMed and Scopus databases, and were evaluated through a standardized methodological quality assessment. Studies were classified according to the eye tracking indexes recorded (saccade characteristics, initial fixation, number of fixations, dwell time, gaze pattern) and the process measured (perception, memory, executive functions). Eye tracking data showed that FASD are mostly associated with impaired ocular perceptive/motor abilities (i.e., altered eye movements, centrally for saccade initiation), lower accuracy as well as increased error rates in saccadic eye movements involving working memory abilities, and reduced inhibitory control on saccades. After identifying the main limitations presented by the reviewed studies, we propose guidelines for future research, underlining the need to increase the standardization of diagnosis and evaluation tools, and to improve the methodological quality of eye tracking measures. [less ▲]

Detailed reference viewed: 33 (1 UL)
Full Text
Peer Reviewed
See detailPeptide-Imprinted Poly(hydroxymethyl 3,4-ethylenedioxythiophene) Nanotubes for Detection of Alpha Synuclein in Human Brain Organoids
Lee, Mei-Hwa; Liu, Kuan-Ting; Thomas, James Louis et al

in ACS Applied Nano Materials (2020)

Detailed reference viewed: 68 (5 UL)
Full Text
Peer Reviewed
See detailOn the Convergence of Max-Min Fairness Power Allocation in Massive MIMO Systems
Chaves, Rafael S.; Cetin, Ediz; Lima, Markus V.S. et al

in IEEE Communications Letters (2020)

Power allocation techniques, among which the max-min fairness power allocation (MMFPA) is one of the most widely used, are essential to guarantee good data throughput for all users in a cell. Recently, an ... [more ▼]

Power allocation techniques, among which the max-min fairness power allocation (MMFPA) is one of the most widely used, are essential to guarantee good data throughput for all users in a cell. Recently, an efficient MMFPA algorithm for massive multiple-input multiple-output (MIMO) systems has been proposed. However, this algorithm is susceptible to the initial search interval employed by the underlying bisection search. Even if the optimal point belongs to the initial search interval, this algorithm may fail to converge to such a point. In this paper, we use the Perron-Frobenius theory to explain this issue and provide search intervals that guarantee convergence to the optimal point. Furthermore, we propose the bound test procedure as an efficient way of initializing the search interval. Simulation results corroborate our findings. [less ▲]

Detailed reference viewed: 88 (4 UL)
Full Text
Peer Reviewed
See detailExtended Adjacency and Scale-dependent Graph Fourier Transform via Diffusion Distances
Elias, Vitor R.M.; Alves Martins, Wallace UL; Werner, Stefan

in IEEE Transactions on Signal and Information Processing over Networks (2020)

This paper proposes the augmentation of the adjacency model of networks for graph signal processing. It is assumed that no information about the network is available, apart from the initial adjacency ... [more ▼]

This paper proposes the augmentation of the adjacency model of networks for graph signal processing. It is assumed that no information about the network is available, apart from the initial adjacency matrix. In the proposed model, additional edges are created according to a Markov relation imposed between nodes. This information is incorporated into the extended-adjacency matrix as a function of the diffusion distance between nodes. The diffusion distance measures similarities between nodes at a certain diffusion scale or time, and is a metric adopted from diffusion maps. Similarly, the proposed extended-adjacency matrix depends on the diffusion scale, which enables the definition of a scale-dependent graph Fourier transform. We conduct theoretical analyses of both the extended adjacency and the corresponding graph Fourier transform and show that different diffusion scales lead to different graph-frequency perspectives. At different scales, the transform discriminates shifted ranges of signal variations across the graph, revealing more information on the graph signal when compared to traditional approaches. The scale-dependent graph Fourier transform is applied for anomaly detection and is shown to outperform the conventional graph Fourier transform. [less ▲]

Detailed reference viewed: 155 (7 UL)
Full Text
Peer Reviewed
See detailNGAP: a novel hybrid metaheuristic algorithm for round-trip carsharing fleet planning
Changaival, Boonyarit UL; Danoy, Grégoire UL; Kliazovich et al

in GECCO '20: Genetic and Evolutionary Computation Conference, Companion Volume, Cancún, Mexico, July 8-12, 2020 (2020)

Detailed reference viewed: 38 (4 UL)
Full Text
Peer Reviewed
See detailA European proposal for quality control and quality assurance of tandem mass spectral libraries
Oberacher, Herbert; Sasse, Michael; Antignac, Jean-Philippe et al

in Environmental Sciences Europe (2020), 32(1), 1--19

Background: High resolution mass spectrometry (HRMS) is being used increasingly in the context of suspect and non-targeted screening for the identification of bioorganic molecules. There is ... [more ▼]

Background: High resolution mass spectrometry (HRMS) is being used increasingly in the context of suspect and non-targeted screening for the identification of bioorganic molecules. There is correspondingly increasing awareness that higher confidence identification will require a systematic, group effort to increase the fraction of compounds with tandem mass spectra available in central, publicly available resources. While typical suspect screening efforts will only result in tentative annotations with a moderate level of confidence, library spectral matches will yield higher confidence or even full confirmation of the identity if the reference standards are available. Results: This article first explores representative percent coverage of measured tandem mass spectra in selected major environmental suspect databases of interest in the context of human biomonitoring, demonstrating the current extensive gap between the number of potential substances of interest (up to hundreds of thousands) and measured spectra (0.57–3.6% of the total chemicals have spectral information available). Furthermore, certain datasets are benchmarked, based on previous efforts, to show the extent to which acquired experimental data were comparable between laboratories, even with HRMS instruments based on different technologies (i.e., quadrupole–quadrupole-time of flight versus ion trap/quadrupole-Orbitrap). Instruments and settings that are less comparable are also revealed, primarily linear ion trap instruments, which show distinctly lower comparability. Conclusions: Based on these efforts, harmonization guidelines for the acquisition and processing of tandem mass spectrometry data are proposed to enable European (and ideally worldwide) laboratories to contribute to common resources, without requiring extensive changes to their current in house methods. [less ▲]

Detailed reference viewed: 65 (1 UL)
Peer Reviewed
See detailMinimalist life orientations as a dialogical tool for happiness
Hausen, Jennifer UL

in The pursuit of happiness: Between prosperity and adversity (2020)

Detailed reference viewed: 54 (1 UL)
Full Text
See detailIntroducing new open science practices at EJPA. European Journal of Psychological Assessment
Greiff, Samuel UL; van der Westhuizen, Lindie UL; Mund, M et al

in European Journal of Psychological Assessment (2020), 36

Detailed reference viewed: 69 (0 UL)
Full Text
Peer Reviewed
See detailShort closed geodesics with self-intersections
Erlandsson, Viveka; Parlier, Hugo UL

in Math. Proc. Cambridge Philos. Soc. (2020), 169(3), 623--638

Detailed reference viewed: 92 (0 UL)
Full Text
Peer Reviewed
See detailCounting curves, and the stable length of currents
Erlandsson, Viveka; Parlier, Hugo UL; Souto, Juan

in J. Eur. Math. Soc. (JEMS) (2020), 22(6), 1675--1702

Detailed reference viewed: 84 (0 UL)
Full Text
Peer Reviewed
See detailGeometric simplicial embeddings of arc-type graphs
Parlier, Hugo UL; Weber, Ashley

in J. Korean Math. Soc. (2020), 57(5), 1103--1118

Detailed reference viewed: 78 (0 UL)
Full Text
See detailComputational Metabolomics: From Cheminformatics to Machine Learning (Dagstuhl Seminar 20051)
Böcker, Sebastian; Broeckling, Corey; Schymanski, Emma UL et al

in Dagstuhl Reports (2020)

Dagstuhl Seminar 20051 on Computational Metabolomics is the third edition of seminars onthis topic and focused on Cheminformatics and Machine Learning. With the advent of higherprecision instrumentation ... [more ▼]

Dagstuhl Seminar 20051 on Computational Metabolomics is the third edition of seminars onthis topic and focused on Cheminformatics and Machine Learning. With the advent of higherprecision instrumentation, application of metabolomics to a wider variety of small molecules, andever increasing amounts of raw and processed data available, developments in cheminformaticsand machine learning are sorely needed to facilitate interoperability and leverage further insightsfrom these data. Following on from Seminars 17491 and 15492, this edition convened bothexperimental and computational experts, many of whom had attended the previous sessions andbrought much-valued perspective to the week’s proceedings and discussions. Throughout theweek, participants first debated on what topics to discuss in detail, before dispersing into smaller,focused working groups for more in-depth discussions. This dynamic format was found to bemost productive and ensured active engagement amongst the participants. The abstracts inthis report reflect these working group discussions, in addition to summarising several informalevening sessions. Action points to follow-up on after the seminar were also discussed, includingfuture workshops and possibly another Dagstuhl seminar in late 2021 or 2022. [less ▲]

Detailed reference viewed: 68 (3 UL)
Full Text
Peer Reviewed
See detailThe NORMAN Association and the European Partnership for Chemicals Risk Assessment (PARC): let’s cooperate!
Dulio, Valeria; Koschorreck, Jan; van Bavel, Bert et al

in Environmental Sciences Europe (2020), 32(1), 1--11

The Partnership for Chemicals Risk Assessment (PARC) is currently under development as a joint research and innovation programme to strengthen the scientific basis for chemical risk assessment in the EU ... [more ▼]

The Partnership for Chemicals Risk Assessment (PARC) is currently under development as a joint research and innovation programme to strengthen the scientific basis for chemical risk assessment in the EU. The plan is to bring chemical risk assessors and managers together with scientists to accelerate method development and the production of necessary data and knowledge, and to facilitate the transition to next-generation evidence-based risk assessment, a non-toxic environment and the European Green Deal. The NORMAN Network is an independent, well-established and competent network of more than 80 organisations in the field of emerging substances and has enormous potential to contribute to the implementation of the PARC partnership. NORMAN stands ready to provide expert advice to PARC, drawing on its long experience in the development, harmonisation and testing of advanced tools in relation to chemicals of emerging concern and in support of a European Early Warning System to unravel the risks of contaminants of emerging concern (CECs) and close the gap between research and innovation and regulatory processes. In this commentary we highlight the tools developed by NORMAN that we consider most relevant to supporting the PARC initiative: (i) joint data space and cutting-edge research tools for risk assessment of contaminants of emerging concern; (ii) collaborative European framework to improve data quality and comparability; (iii) advanced data analysis tools for a European early warning system and (iv) support to national and European chemical risk assessment thanks to harnessing, combining and sharing evidence and expertise on CECs. By combining the extensive knowledge and experience of the NORMAN network with the financial and policy-related strengths of the PARC initiative, a large step towards the goal of a non-toxic environment can be taken. [less ▲]

Detailed reference viewed: 58 (3 UL)
Full Text
Peer Reviewed
See detailExpanded coverage of non-targeted LC-HRMS using atmospheric pressure chemical ionization: a case study with ENTACT mixtures.
Singh, Randolph UL; Chao, Alex; Phillips, Katherine A. et al

in Analytical and Bioanalytical Chemistry (2020)

Non-targeted analysis (NTA) is a rapidly evolving analytical technique with numerous opportunities to improve and expand instrumental and data analysis methods. In this work, NTA was performed on eight ... [more ▼]

Non-targeted analysis (NTA) is a rapidly evolving analytical technique with numerous opportunities to improve and expand instrumental and data analysis methods. In this work, NTA was performed on eight synthetic mixtures containing 1264 unique chemical substances from the U.S. Environmental Protection Agency’s Non-Targeted Analysis Collaborative Trial (ENTACT). These mixtures were analyzed by atmospheric pressure chemical ionization (APCI) and electrospray ionization (ESI) using both positive and negative polarities for a total of four modes. Out of the 1264 ENTACT chemical substances, 1116 were detected in at least one ionization mode, 185 chemicals were detected using all four ionization modes, whereas 148 were not detected. Forty-four chemicals were detected only by APCI, and 181 were detected only by ESI. Molecular descriptors and physicochemical properties were used to assess which ionization type was preferred for a given compound. One ToxPrint substructure (naphthalene group) was found to be enriched in compounds only detected using APCI, and eight ToxPrints (e.g., several alcohol moieties) were enriched in compounds only detected using ESI. Examination of physicochemical parameters for ENTACT chemicals suggests that those with higher aqueous solubility preferentially ionized by ESI−. While ESI typically detects a larger number of compounds, APCI offers chromatograms with less background, fewer co-elutions, and additional chemical space coverage, suggesting both should be considered for broader coverage in future NTA research. [less ▲]

Detailed reference viewed: 56 (1 UL)
See detailEurope Materializing? Auf dem Weg zu einer transnationalen Geschichte der europäischen Infrastrukturen
Fickers, Andreas UL; Badenoch, Alexander

in Wagner, Hedwig (Ed.) Europäische Medienwissenschaft. Zur Programmatik eines Fachs (2020)

Detailed reference viewed: 45 (2 UL)