Abstract Investigations on electric conductivity have been performed polycarbonate (PC) containing 0.6 vol% of multi‐walled carbon nanotubes (MWNT) in a rheometer, where the plates act as capacitor for dielectric spectroscopy. The time dependent recovery DC‐conductivity was recorded rest after transient shear deformation. shows tremendous increase with shearing. This is explained by reorganization conducting MWNT‐network, which destroyed shear. reformation kinetics MWNT‐clusters considered...

Background: Despite the importance of understanding associations air pollution and noise exposure with loss neurocognitive performance, studies investigating these exposures local brain structure are limited. Objective: We estimated residential test performance gyrification index (lGI), a marker for atrophy, among older adults. Methods: For n=615 participants from population-based 1000BRAINS study, based on German Heinz Nixdorf Recall we assessed to particulate matter (PM10, PM2.5,...

The forward effect of testing refers to the finding that retrieval practice previously studied information increases retention subsequently other information. It has recently been hypothesized (partly) reflects result a reset-of-encoding (ROE) process. proposal is encoding efficacy decreases with an increase in study material, but resets process and makes as effective goal present was verify ROE hypothesis on item level basis. An experiment reported examined effects comparison restudy items'...

Abstract For organic photovoltaics (OPV) the maximum in obtainable power conversion efficiency is limited by a low semiconductor permittivity and resulting enhanced Coulomb interaction (CI). This, however, an aspect rarely addressed OPV development. Here, concept introduced which allows reduced CI semiconductors. This result of device structure, upon exciton formation forces part electric field between complementary charges through high‐ k material, partial screening as such CI. The...

We present results of in situ measurements the filling process polymer melts nanopores. After accurate characterization empty nanopores, they are filled with hydrophobic polyisobutylene and hydrophilic poly-ϵ-caprolactone. The is investigated small angle x-ray scattering. time-dependent scattering intensity a model function based on Lucas–Washburn equation for liquids cylindrical pores. describes data qualitatively well terms t-dependency height, but deviates clearly from expected...

Flat and homogeneous films by ink jet printing of organic materials are proven to be essential for OLED application. The impact formulation, film thickness, pixel size, bank layout process conditions (i.e. drying parameters) have been investigated. Their severe on device performance is illustrated.

Inkjet printing (IJP) is on the rise to become a competitive production technology for organic light emitting diodes (OLEDs). Recent progress in with drop volumes down pL regime as well constant performance improvements from material point of view have opened way towards IT displays. Here target resolutions are 250 ppi and beyond. For this purpose, small molecules highly suitable due their low impact ink viscosity excellent device performance. Their current status reviewed based bottom top...

In this article a concept is introduced, which allows for reduced Coulomb interaction in organic solar cells and as such enhanced power conversion efficiencies. The based on the introduction of electrically insulating, nanostructured high-k materials into matrix, do not contribute to charge transport, however, effectively enhance permittivity active layer thereby reduce interaction. Using an analytical model it demonstrated that even at distance 20 nm / inorganic interface nanostructure, can...

The association between life event stress and depressive symptoms has not been analyzed in the general population before.In population-based Heinz Nixdorf Recall study, we assessed of 1.) presence important events 2.) stress, with amount univariable linear regressions multivariable adjusted for age sex (model 1) age, optimism as determinants coping 2). Presence were Social Readjustment Rating Scale (SRRS), Life Orientation Test-Revised (LOT-R), 15-item Center Epidemiological Studies...

Aim: To determine the 10-year cumulative incidence of high depressive symptoms in people with diagnosed and, particular, previously undetected diabetes compared to those without a population-based cohort study Germany. Materials and Methods: We included 2813 participants (52.9% men, mean age (SD) 58.9 (7.7) years, 7.1% diabetes, 5.6% diabetes) from Heinz Nixdorf Recall study. calculated odds ratios (OR) 95% confidence intervals (CI) using multiple logistic regression analyses for diabetes....

This article reviews the current performance of inkjet printed OLEDs. Recent progress on crucial parameter blue sub‐pixel lifetime is shown, achieved by improving stability emissive material. By adjusting charge balance towards highest efficiency, an external quantum efficiency 11% can be achieved. Further also illustrated for red devices. Within latest R&D type material, a significant increase observed improvement horizontal orientation Prospectively, this will close gap between evaporated and

Pellistors are well known for the detection of combustible gases. In this paper we present a simple preparation technique micro pellistors based on commercially available Si substrate, which is normally used semiconducting gas sensitive layers. Catalytically active layers achieved by drop deposition very low volumes noble metal containing solutions. Temperature cycling and intelligent signal processing to achieve high selectivity. Due thermal time constants discrimination between gasoline...

In this article a concept is introduced, which allows for reduced Coulomb interaction in organic solar cells and as such enhanced power conversion efficiencies. The based on the introduction of electrically insulating, nanostructured high-k materials into matrix, do not contribute to charge transport, however, effectively enhance permittivity active layer thereby reduce interaction. Using an analytical model it demonstrated that even at distance 20 nm / inorganic interface nanostructure, can...

Temperature cycling of semiconductor gas sensors is a very powerful tool for developing detection systems with high selectivity and stability. Microstructured - due to their low thermal mass have time constants in the range 10 ms. Based on these sensors, development fast highly selective possible using temperature cycles spanning whole operating ten or more levels an overall duration only few seconds. I efficient evaluation systems, we developed versatile hardware platform which provides...

Background: Depressive symptoms are volatile over time but empirical studies of intra-individual variations depressive longer periods sparse. Aims: We aim to examine fluctuation patterns and investigate the possible influence age, sex socioeconomic factors on in a population-based sample period 13 years. Methods: used data 4,251 participants (45–75 years; 51.0% women at baseline) Heinz Nixdorf Recall Study with least two nine measurements obtained between 2000 2017. were assessed via Center...

Abstract Background To measure depressive symptoms in population-based studies, there are two well-established questionnaires: the Center for Epidemiologic Studies Depression Scale (CES-D) and Patient Health Questionnaire-9 (PHQ-9). So far, comparisons between both instruments have only been performed using cross-sectional data, specific patient groups. Furthermore, studies missing as well sex-specific analyses. The aim is to evaluate psychometric properties concordance of longitudinal...

A concept is introduced which allows for reduced Coulomb interaction in organic solar cells and as such enhanced power conversion efficiencies. The based on the introduction of electrically insulating, nanostructured high-k materials into matrix, do not contribute to charge carrier transport, however, enhance effective permittivity active layer. Using an analytical model, it demonstrated that even at a distance 20 nm organic/inorganic interface nanostructure, semiconductor can be by more...

Depressive symptoms (DS) are a common mental disorder, however less is known about intra-individual fluctuations over long time period. Aim here to categorize fluctuation patterns and describe study participants with different of changes DS period 12 years in regard socioeconomic lifestyle factors.

The forward effect of testing refers to the finding that retrieval practice previously studied information increases retention subsequently other information. It has recently been hypothesized (partly) reflects result a reset-of-encoding (ROE) process. proposal is encoding efficacy decreases with an increase in study material, but resets process and makes as effective goal present was verify ROE hypothesis on item level basis. An experiment reported examined effects comparison restudy items’...

Abstract Background: To measure depressive symptoms (DS) in population-based studies, there are two the well-established questionnaires: Center for Epidemiologic Studies Depression Scale (CES-D) and Patient Health Questionnaire-9 (PHQ-9). So far, comparisons between both instruments have only been performed using cross-sectional data, specific patient groups. Furthermore, studies missing as well sex-specific analyses. The aim is to evaluate psychometric properties concordance of longitudinal...