7 research outputs found

    What Is Your Diagnosis?

    No full text
    WoSScopu

    A "light bulb moment": Lab experiments enhancing novelty and critical thinking designed by future teachers

    No full text
    The aim of this study is to investigate the effect of home science practices on science teacher candidates' critical thinking dispositions, science learning skills, scientific inquiry skills, and learning styles within the scope of open inquiry-based science laboratory practices. For this purpose, the opinions of prospective science teachers within the scope of home science laboratory practices are explored. Participants included 79 third-grade elementary school level (i.e., 8+ year olds) science teacher candidates. Convergent parallel mixed design from mixed methods was used in the study. As a result of the quantitative analysis of the research, a statistically significant difference was found between the pre-test and post-test results of the science teacher candidates' critical thinking dispositions and science learning skills of home science practices. Within the scope of open research inquiry-based science laboratory practices, science teacher candidates' home science practices increased in the informed category at the end of the term in all sub dimensions of scientific inquiry skills. It was concluded that science teacher candidates experienced shifts in their learning styles relating to (i.e., Diverging, Assimilating, Converging, and Accommodating) their home science practices. The qualitative results of the study were examined based on the following themes: skills, learning environment, application process, and affective changes

    Photophysical Properties of Benzophenone Based TADF Emitters in Relation to Their Molecular Structure

    No full text
    Thermally activated delayed fluorescence (TADF) materials are commonly used in various apparatus, including organic light emitting device (OLED)-based displays, as they remarkably improve the internal quantum efficiencies (IQE). Alt-hough there is a wide range of donor-acceptor based compounds possessing TADF properties, in this computational study we investigated TADF and some non-TADF chromophores, containing benzophenone or its structural derivatives as the acceptor core, together with various donor moieties. Following the computational modeling of the emitters, several excited state properties, such as the absorption spectra, singlet-triplet energy gaps (∆EST), natural transition orbitals (NTO) and the topological ΦS indices, have been computed. Along with the donor-acceptor torsion angles and spin-orbit coupling (SOC) values, these descriptors have been utilized to investigate potential TADF efficiency. Our study has shown that on the one hand, our photophysical/structural descriptors and computational methodologies predict the experi-mental results quite well, on the other hand, our extensive benchmark can be useful to pinpoint the most promising func-tionals and descriptors for the study of benzophenone based TADF emitters

    A Computational Descriptor Analysis on Excited State Behaviours of a Series of TADF and Non-TADF Compounds

    No full text
    The thermally activated delayed fluorescence (TADF) behaviours of seventeen organic TADF emitters and two non-TADF chromophores bearing various donor and acceptor moieties were investigated, focusing on their torsion angles, singlet-triplet gap (ΔEST), spin orbit couplings (SOC) and topological ΦS index. Electronic structure calculations were performed in the framework of the Tamm-Dancoff approximation (TDA) allowing to characterize reverse intersystem crossing (RISC) probability between the S1 and T1 states. In addition, experimental ΔEST data were taken into account to choose the most appropriate functional and basis set, while absorption spectra were obtained by considering vibrational and dynamical effects through a Wigner sampling of the ground state equilibrium regions. Examining all the parameters obtained in our computational study, we rationalized the influence of electron-donating and electron-accepting groups and the effects of geometrical factors, namely torsion angles, on a wide class of diverse compounds ultimately providing an easy and computationally effective protocol to assess TADF efficiencies

    Clinical and demographic features of hidradenitis suppurativa: A multicentre study of 1221 patients with an analysis of risk factors associated with disease severity

    No full text
    Background Hidradenitis suppurativa (HS) is a chronic, relapsing and debilitating inflammatory disease associated with profound morbidity. Aim In this multicentre study, we investigated the demographic and clinical features of HS, and determined risk factors of disease severity. Methods In total, 1221 patients diagnosed with HS from 29 centres were enrolled, and the medical records of each patient were reviewed. Results The mean age of disease onset was 26.2 +/- 10.4 years, and almost 70% (n = 849) of patients were current or former smokers. Mean disease duration was 8.9 +/- 8.4 years with a delay in diagnosis of 5.8 +/- 3.91 years. Just over a fifth (21%; n = 256) of patients had a family history of HS. The axillary, genital and neck regions were more frequently affected in men than in women, and the inframammary region was more frequently affected in women than in men (P < 0.05 for all). Acne (40.8%), pilonidal sinus (23.6%) and diabetes mellitus (12.6%) were the most prevalent associated diseases. Of the various therapies used, antibiotics (76.4%) were most common followed by retinoids (41.7%), surgical interventions (32.0%) and biologic agents (15.4%). Logistic regression analysis revealed that the most important determinants of disease severity were male sex (OR = 2.21) and involvement of the genitals (OR = 3.39) and inguinal region (OR = 2.25). More severe disease was associated with comorbidity, longer disease duration, longer diagnosis delay and a higher number of smoking pack-years. Conclusions Our nationwide cohort study found demographic and clinical variation in HS, which may help broaden the understanding of HS and factors associated with disease severity
    corecore