Effects of the shape and size of a mooring line surface buoy on the mooring load of wave energy converters

This paper describes the physical model testing of a wave energy converter (WEC) undertaken in the Henot-watt wave basin during October 2010 as part of the SUPERGEN2 project funded by the British gover...     

Use of Polarised Light Microscopy to Improve Conservation of Parchment

ABSTRACT

The preservation state of parchment primarily depends on the structure of the collagen fibre network, which in turn is responsible for optical anisotropy, i.e. birefringence. Polarised light microscopy can therefore be used as a non-invasive technique that allows recording of birefringence distribution in the parchment, which directly relates to stress–strain distribution. Using samples from diverse sources (commercial parchment, parchment used by restorers for book binding, and parchment fabricated for the purpose of this study), we assessed the capability of polarised light microscopy for various diagnostics. We performed, for instance, identification of gelatinised regions, layered or ?brous regions in parchment cross section, qualitative analysis of parchment fat content (lipids), observation of stress-induced patterns resulting from tensile tests, and observation of water diffusion. These proof-of-principle experiments extend the capability of polarised light microscopy far beyond its common use and open the path to its deployment in conservation studies.     

Seroprevalence of SARS-CoV-2 in Croatian solid-organ transplant recipients

IntroductionThe data on the coronavirus disease (COVID-19) in solid-organ transplant recipients (SOTRs) in Croatia is unknown. The aim of this study was to analyze the seroprevalence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in Croatian SOTRs.Materials and methodsFrom 7 September to 27 November 2020 (beginning of the second COVID-19 pandemic wave), a cross-sectional screening for COVID-19 was performed in the adult outpatient liver (LTRs; N = 280) and kidney transplant recipients (KTRs; N = 232). Serum samples were initially tested for SARS-CoV-2 IgG antibodies using a commercial enzyme-linked immunosorbent assay (ELISA; Vircell Microbiologists, Granada, Spain). All positive samples were confirmed using a virus neutralization test (VNT). Data on risk exposure and COVID-19 related symptoms were collected using a questionnaire.ResultsThe transplanted cohort’s seroprevalence detected by ELISA and VNT was 20.1% and 3.1%, respectively. Neutralizing (NT) antibodies developed in 15.6% of anti-SARS-CoV-2 ELISA IgG positive SOTRs. The difference in seropositivity rates between LTRs and KTRs was not statistically significant (ELISA 21.1% vs. 19.0%, P = 0.554; VNT 3.6% vs. 2.6%, P = 0.082). Overall VNT positivity rates were higher in patients who reported participation in large community events (5.9% vs. 1.0%; P = 0.027) as well as in patients who reported COVID-19 related symptoms in the past six months. In addition, symptomatic VNT positive patients showed significantly higher (P = 0.031) NT antibody titers (median 128, interquartile range (IQR) = 32-128) compared to asymptomatic patients (median 16, IQR = 16-48).ConclusionsThis study showed that 15.6% of anti-SARS-CoV-2 ELISA positive Croatian SOTRs developed NT antibodies indicating protective immunity. Further studies are needed to determine the dynamic of NT antibodies and COVID-19 immunity duration in immunocompromised populations such as LTRs and KTRs.     

THE NEW CONVENTION ‐ PROTOCOL ON INTENTIONS OR WORKING AGREEMENT?

A Joint Council of Europe/UNESCO Convention on the Recognition of Qualifications Concerning Higher Education in the European Region is a necessary evolution that takes into account the increased political and economic integration of Europe, the mobility of academic staff members and students, and the diversification of higher education. The latter tendency, indeed, explains the stress on general principles, particularly on recognition, in the draft Joint Convention, rather than on equivalence and attempts at formulating detailed equivalence procedures. However, along with the stress on recognition must come common agreement as to the guarantee of quality and on procedures for accreditation, on the one hand, and access to information on one another's education programmes and their quality ratings, on the other hand. The Joint Council of Europe/UNESCO Convention will be backed by the excellent European National Information Centres on Academic Recognition and Mobility (ENIC).     

THE CROATIAN ACADEMY OF SCIENCES AND ARTS PAST AND FUTURE

The Croatian Academy of Sciences and Arts traces its origins back to efforts to create a learned society in Croatia during the first half of the Nineteenth Century. At first concerned exclusively with the language, literature, and history of Croatia, it evolved into an eclectic organization conducting and sponsoring research in a wide rage of disciplines and fields. Currently, the work of the Academy is concentrated in eight departments and is conducted by eleven scientific councils, ten committees, and twenty research units. Since its founding, the Academy has published almost 3,400 books.     

Who Publishes More Books in U.S. English Departments,Men or Women?

The “gender gap” in the U.S. publication of English language and literature scholarly books has not been fully investigated. In order to investigate gender disparity, we collected, aggregated, and analyzed data on 1633 faculty members who authored or edited 4835 scholarly books at the top 50 U.S. English Ph.D. departments. Despite the fact that more women than men have received Ph.D.s in English since 1987, the top 50 departments are predominantly male, and male faculty members publish more books on a per capita basis. However, who publishes more books in these departments varies: (1) with the department that the faculty member is in (with grater parity in the middle 30 departments); and (2) when the faculty member published their first book, with female faculty who published their first book after 1998 publishing as many books on a per person basis as male faculty. This paper also offers recommendations on how marketing strategies can be used to ameliorate the “gender gap” in this academic field.     

Attentional learning and flexible induction: how mundane mechanisms give rise to smart behaviors

Young children often exhibit flexible behaviors relying on different kinds of information in different situations. This flexibility has been traditionally attributed to conceptual knowledge. Reported research demonstrates that flexibility can be acquired implicitly and it does not require conceptual knowledge. In Experiment 1, 4- to 5-year-olds successfully learned different context-predictor contingencies and subsequently flexibly relied on different predictors in different contexts. Experiments 2A and 2B indicated that flexible generalization stems from implicit attentional learning rather than from rule discovery, and Experiment 3 pointed to very limited strategic control over generalization behaviors in 4- to 5-year-olds. These findings indicate that mundane mechanisms grounded in associative and attentional learning may give rise to smart flexible behaviors.