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  1. Article ; Online: Pattern formation of spherical particles in an oscillating flow.

    van Overveld, T J J M / Clercx, H J H / Duran-Matute, M

    Physical review. E

    2023  Volume 108, Issue 2-2, Page(s) 25103

    Abstract: We study the self-organization of spherical particles in an oscillating flow through experiments inside an oscillating box. The interactions between the particles and the time-averaged (steady streaming) flow lead to the formation of either one-particle- ... ...

    Abstract We study the self-organization of spherical particles in an oscillating flow through experiments inside an oscillating box. The interactions between the particles and the time-averaged (steady streaming) flow lead to the formation of either one-particle-thick chains or multiple-particle-wide bands, depending on the oscillatory conditions. Both the chains and the bands are oriented perpendicular to the direction of oscillation with a regular spacing between them. For all our experiments, this spacing is only a function of the relative particle-fluid excursion length normalized by the particle diameter, A_{r}/D, implying that it is an intrinsic quantity that is established only by the hydrodynamics. In contrast, the width of the bands depends on both A_{r}/D and the confinement, characterized by the particle coverage fraction ϕ. Using the relation for the chain spacing, we accurately predict the transition from one-particle-thick chains to wider bands as a function of ϕ and A_{r}/D. Our experimental results are complemented with numerical simulations in which the flow around the particles is fully resolved. These simulations show that the regular chain spacing arises from the balance between long-range attractive and short-range repulsive hydrodynamic interactions, caused by the vortices in the steady streaming flow. We further show that these vortices induce an additional attractive interaction at very short range when A_{r}/D≳0.7, which stabilizes the multiple-particle-wide bands. Finally, we give a comprehensive overview of the parameter space where we illustrate the different regions using our experimental data.
    Language English
    Publishing date 2023-09-18
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2844562-4
    ISSN 2470-0053 ; 2470-0045
    ISSN (online) 2470-0053
    ISSN 2470-0045
    DOI 10.1103/PhysRevE.108.025103
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  2. Article ; Online: Crowned dens syndrome. It's never too late to diagnose.

    Chacur, Chafik / Matute, Mario / Nadal, Bernat / Guañabens, Núria

    Medicina clinica

    2023  Volume 161, Issue 1, Page(s) 47

    MeSH term(s) Humans ; Syndrome ; Calcinosis
    Language Spanish
    Publishing date 2023-04-13
    Publishing country Spain
    Document type Journal Article
    ZDB-ID 411607-0
    ISSN 1578-8989 ; 0025-7753
    ISSN (online) 1578-8989
    ISSN 0025-7753
    DOI 10.1016/j.medcli.2023.02.017
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    In stock of ZB MED Cologne/Königswinter

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  3. Book ; Article ; Online: How Representative Are Social Partners in Europe? The Role of Dissimilarity

    Martínez Matute, Marta / Martins, Pedro S.

    2022  

    Abstract: Social partners (trade unions and employers' associations) and their representativeness can shape labour institutions and economic and social outcomes in many countries. In this paper, we argue that, when examining social partners' representativeness, it ...

    Abstract Social partners (trade unions and employers' associations) and their representativeness can shape labour institutions and economic and social outcomes in many countries. In this paper, we argue that, when examining social partners' representativeness, it is important to consider both affiliation rates and dissimilarity measures. The latter concerns the extent to which affiliated and non-affiliated firms or workers are distributed similarly across relevant dimensions, including firm size. In our analysis of the European Company Survey, we find that affiliation density and dissimilarity measures correlate positively across countries, particularly in the case of employers' associations in which we focus. This result also holds across employers' associations when we use more detailed, firm population data for Portugal. We conclude that higher affiliation densities do not necessarily correspond to more representative social partners as they can involve greater dissimilarity between affiliated and non-affiliated firms.
    Keywords ddc:330 ; J50 ; J23 ; L22 ; social dialogue ; employers' associations ; collective bargaining
    Subject code 338
    Language English
    Publisher Bonn: Institute of Labor Economics (IZA)
    Publishing country de
    Document type Book ; Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Book ; Article ; Online: Task Specialization and Cognitive Skills

    Martínez Matute, Marta / Villanueva, Ernesto

    Evidence from PIAAC and IALS

    2020  

    Abstract: We study how the tasks conducted on the job relate to measures of cognitive skills using data from 18 countries participating in the Programme for the International Assessment of Adult Competences (PIAAC) and from 13 countries that also participate in ... ...

    Abstract We study how the tasks conducted on the job relate to measures of cognitive skills using data from 18 countries participating in the Programme for the International Assessment of Adult Competences (PIAAC) and from 13 countries that also participate in the International Adult Literacy Study (IALS). We document two main findings. Firstly, individual- fixed effect models suggest that low-educated workers in jobs involving a particular set of basic tasks -say, in numeric rather than reading or ICT tasks- obtain 10% of one standard deviation higher scores in the domain of the PIAAC assessment most related to those tasks than in the rest -say, numeracy relative to literacy or problem-solving scores. The estimates are weaker for workers with a high school or college degree, those with more than 10 years of experience or who are males. Secondly, a synthetic cohort analysis using repeated literacy assessments in IALS and PIAAC indicates that, among the low-educated, long-run increases in the reading task component of jobs correlate positively with increases in cohort-level literacy scores. An interpretation of our findings is that tasks conducted on the job help in building human capital. Under that interpretation, our back-of-the envelope estimates suggest that the contribution of one year of on-the-job learning to skill formation is between a half and a fourth of an extra year of compulsory schooling.
    Keywords ddc:330 ; J24 ; J31 ; I20 ; human capital ; tasks ; education ; working experience ; cognitive skills
    Subject code 331
    Language English
    Publisher Bonn: Institute of Labor Economics (IZA)
    Publishing country de
    Document type Book ; Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Book ; Article ; Online: Uncertainty and Firms' Labour Decisions. Evidence from European Countries

    Martinez-Matute, Marta / Urtasun, Alberto

    2020  

    Abstract: Uncertainty affects employers' decisions on labour workforce, as it does on capital. We exploit differences on how firms adjust their labour work-force when uncertainty increases. Using data from the Wage Dynamic Network Survey for 25 European countries, ...

    Abstract Uncertainty affects employers' decisions on labour workforce, as it does on capital. We exploit differences on how firms adjust their labour work-force when uncertainty increases. Using data from the Wage Dynamic Network Survey for 25 European countries, we first construct, opposite to usual aggregate indicators, a set of uncertainty indicators exploiting firms' microeconomic environment. We combine variability from the country, sector and size of the firm. Secondly, we investigate the effect of uncertainty on firms' strategies to adjust labour through hirings and rings. Results reveal that firms reduce hiring decisions and recur to individual layos more frequently when uncertainty increases. An increase of one point in the uncertainty indicator increases the probability of having frozen hiring in between 21% to 39%. We also find more significant effects when firms are facing credit constraints and labour adjustment costs are higher.
    Keywords ddc:330 ; D22 ; D81 ; J21 ; J23 ; uncertainty ; labour adjustment ; firms' labour decisions ; freeze hirings ; layoffs
    Subject code 338
    Language English
    Publisher Bonn: Institute of Labor Economics (IZA)
    Publishing country de
    Document type Book ; Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: Wavelength selection of vortex ripples in an oscillating cylinder: The effect of curvature and background rotation.

    Duran-Matute, M / van Gorp, M D / van Heijst, G J F

    Physical review. E

    2019  Volume 99, Issue 3-1, Page(s) 33105

    Abstract: We present results of laboratory experiments on the formation, evolution, and wavelength selection of vortex ripples. These ripples formed on a sediment bed at the bottom of a water-filled oscillating cylindrical tank mounted on top of a rotating table. ... ...

    Abstract We present results of laboratory experiments on the formation, evolution, and wavelength selection of vortex ripples. These ripples formed on a sediment bed at the bottom of a water-filled oscillating cylindrical tank mounted on top of a rotating table. The table is made to oscillate sinusoidally in time, while a constant background rotation was added for some experiments. The changes in bed thickness are measured using a light attenuation technique. It was found that the wavelength normalized with the excursion length depends on both a Reynolds number and the Strouhal number. This differs from straight or annular geometries where the wavelength is proportional to the excursion length. The flow in an oscillating cylinder has the peculiarity that it develops a secondary flow in the radial direction that depends on the excursion length. The effect of this secondary circulation is evident in the radial transport for small values of the Strouhal number or in the orientation of the ripples for strong enough background rotation. Additionally, ripples in an oscillating cylinder present a rich dynamic behavior where the number of ripples can oscillate even with constant forcing parameters.
    Language English
    Publishing date 2019-04-11
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2844562-4
    ISSN 2470-0053 ; 2470-0045
    ISSN (online) 2470-0053
    ISSN 2470-0045
    DOI 10.1103/PhysRevE.99.033105
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Book ; Online: Interannual variability of mean sea level and its sensitivity to wind climate in an inter-tidal basin

    Gerkema, Theo / Duran-Matute, Matias

    eISSN: 2190-4987

    2018  

    Abstract: The relationship between the annual wind records from a weather station and annual mean sea level in an inter-tidal basin, the Dutch Wadden Sea, is examined. Recent, homogeneous wind records are used, covering the past 2 decades. It is demonstrated that ... ...

    Abstract The relationship between the annual wind records from a weather station and annual mean sea level in an inter-tidal basin, the Dutch Wadden Sea, is examined. Recent, homogeneous wind records are used, covering the past 2 decades. It is demonstrated that even such a relatively short record is sufficient for finding a convincing relationship. The interannual variability of mean sea level is largely explained by the west–east component of the net wind energy, with some further improvement if one also includes the south–north component and the annual mean atmospheric pressure. Using measured data from a weather station is found to give a slight improvement over reanalysis data, but for both the correlation between annual mean sea level and wind energy in the west–east direction is high. For different tide gauge stations in the Dutch Wadden Sea and along the coast, we find the same qualitative characteristics, but even within this small region, different locations show a different sensitivity of annual mean sea level to wind direction. Correcting observed values of annual mean level for meteorological factors reduces the margin of error (expressed as 95 % confidence interval) by more than a factor of 4 in the trends of the 20-year sea level record. Supplementary data from a numerical hydrodynamical model are used to illustrate the regional variability in annual mean sea level and its interannual variability at a high spatial resolution. This study implies that climatic changes in the strength of winds from a specific direction may affect local annual mean sea level quite significantly.
    Subject code 551 ; 333
    Language English
    Publishing date 2018-09-27
    Publishing country de
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: Molecular epidemiology of carbapenem-resistant gram-negative bacilli in Ecuador.

    Soria-Segarra, Claudia / Soria-Segarra, Carmen / Molina-Matute, Marcos / Agreda-Orellana, Ivanna / Núñez-Quezada, Tamara / Cevallos-Apolo, Kerly / Miranda-Ayala, Marcela / Salazar-Tamayo, Grace / Galarza-Herrera, Margarita / Vega-Hall, Victor / Villacis, José E / Gutiérrez-Fernández, José

    BMC infectious diseases

    2024  Volume 24, Issue 1, Page(s) 378

    Abstract: Introduction: Carbapenem-resistant gram-negative bacilli are a worldwide concern because of high morbidity and mortality rates. Additionally, the increasing prevalence of these bacteria is dangerous. To investigate the extent of antimicrobial resistance ...

    Abstract Introduction: Carbapenem-resistant gram-negative bacilli are a worldwide concern because of high morbidity and mortality rates. Additionally, the increasing prevalence of these bacteria is dangerous. To investigate the extent of antimicrobial resistance and prioritize the utility of novel drugs, we evaluated the molecular characteristics and antimicrobial susceptibility profiles of carbapenem-resistant Enterobacterales, Pseudomonas aeruginosa and Acinetobacter baumannii in Ecuador in 2022.
    Methods: Ninety-five clinical isolates of carbapenem non-susceptible gram-negative bacilli were collected from six hospitals in Ecuador. Carbapenem resistance was confirmed with meropenem disk diffusion assays following Clinical Laboratory Standard Institute guidelines. Carbapenemase production was tested using a modified carbapenemase inactivation method. Antimicrobial susceptibility was tested with a disk diffusion assay, the Vitek 2 System, and gradient diffusion strips. Broth microdilution assays were used to assess colistin susceptibility. All the isolates were screened for the bla
    Results: Carbapenemase production was observed in 96.84% of the isolates. The bla
    Conclusion: The epidemiology of carbapenem resistance in Ecuador is dominated by carbapenemase-producing K. pneumoniae harbouring bla
    MeSH term(s) Humans ; Carbapenems/pharmacology ; Meropenem ; Molecular Epidemiology ; Ecuador/epidemiology ; Microbial Sensitivity Tests ; beta-Lactamases/genetics ; Bacterial Proteins/genetics ; Anti-Bacterial Agents/pharmacology ; Gram-Negative Bacteria/genetics ; Klebsiella pneumoniae/genetics ; Pseudomonas aeruginosa/genetics
    Chemical Substances Carbapenems ; Meropenem (FV9J3JU8B1) ; beta-Lactamases (EC 3.5.2.6) ; Bacterial Proteins ; Anti-Bacterial Agents
    Language English
    Publishing date 2024-04-06
    Publishing country England
    Document type Journal Article
    ZDB-ID 2041550-3
    ISSN 1471-2334 ; 1471-2334
    ISSN (online) 1471-2334
    ISSN 1471-2334
    DOI 10.1186/s12879-024-09248-6
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  9. Book ; Article ; Online: How representative are social partners in Europe? The role of dissimilarity

    Martínez Matute, Marta / Martins, Pedro S.

    2020  

    Abstract: Social partners (trade unions and employers' associations) shape labour institutions and economic and social outcomes in many countries. In this paper, we argue that, when examining social partners' representativeness, it is important to consider both ... ...

    Abstract Social partners (trade unions and employers' associations) shape labour institutions and economic and social outcomes in many countries. In this paper, we argue that, when examining social partners' representativeness, it is important to consider both affiliation and dissimilarity measures. The latter concerns the extent to which affiliated and non- affiliated firms or workers are distributed similarly across relevant dimensions, including firm size. In our analysis of European Company Survey data, we find that affiliation and dissimilarity measures correlate positively across countries, particularly in the case of employers' associations. This result also holds across employers' associations when we use firm population data for Portugal. Overall, we conclude that higher affiliation rates do not necessarily equate to more representative social partners as they can involve greater dissimilarity between affiliated and non-affiliated firms.
    Keywords ddc:330 ; J50 ; J23 ; L22 ; Employers' Associations ; Social Dialogue ; Collective Bargaining
    Subject code 338
    Language English
    Publisher Essen: Global Labor Organization (GLO)
    Publishing country de
    Document type Book ; Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: «Before Applying the Next Dose, Peel the White Film Off the Lesion».

    López Gómez, A / Ezsol Lendvai, Z / de la Hera Matute, M I

    Actas dermo-sifiliograficas

    2020  Volume 111, Issue 7, Page(s) 611

    Title translation «Antes de la siguiente aplicación, retira la película blanca».
    Language Spanish
    Publishing date 2020-06-15
    Document type Journal Article
    ZDB-ID 2541876-2
    ISSN 2173-5778 ; 2173-5778
    ISSN (online) 2173-5778
    ISSN 2173-5778
    DOI 10.1016/j.ad.2018.08.019
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