The spatial energy distribution under a phototherapy unit fitted with a special halide lamp (ex. Hereaus, "Photo-Therapie 800") is particularly uneven, with a pronounced decrease in energy towards the edges. With a correct positioning of the child in the centre of the luminous cone however, the energy of the effective light is still distinctly higher than that received from a phototherapy unit fitted with 6 blue fluorescent tubes (Philips 20W/52 BAM blue). With the addition of lateral aluminium reflectors, not only is the effective energy intensity increased, but also the spatial energy distribution becomes more even, so that a very exact positioning of the child is no longer required.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Spatiotemporal patterns in active four-state Potts models.
Sci Rep
January 2025
Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba, 277-8581, Japan.
Many types of spatiotemporal patterns have been observed under nonequilibrium conditions. Cycling through four or more states can provide specific dynamics, such as the spatial coexistence of multiple phases. However, transient dynamics have only been studied by previous theoretical models, since absorbing transition into a uniform phase covered by a single state occurs in the long-time limit.
View Article and Find Full Text PDFSVM directed machine learning classifier for human action recognition network.
Sci Rep
January 2025
Department of Electrical and Computer Engineering, Hawassa University, Hawassa 05, Ethiopia.
Understanding human behavior and human action recognition are both essential components of effective surveillance video analysis for the purpose of guaranteeing public safety. However, existing approaches such as three-dimensional convolutional neural networks (3D CNN) and two-stream neural networks (2SNN) have computational hurdles due to the significant parameterization they require. In this paper, we offer HARNet, a specialized lightweight residual 3D CNN that is built on directed acyclic graphs and was created expressly to handle these issues and achieve effective human action detection.
View Article and Find Full Text PDFMethane Adsorption in Heterogeneous Potential Wells of Coal: Characterization Model and Applications.
Langmuir
January 2025
Key Laboratory of Insitu Property improving Mining of Ministry of Education, Taiyuan University of Technology, No,18 Xinkuangyuan Road, Wanbailin District, Taiyuan, Shanxi 030024, P. R. China.
In terms of the phenomenon of nonuniformity adsorption energy between methane and a natural heterogeneous coal surface, a heterogeneous potential well model is established in this study based on adsorption science and molecular dynamics theories. This model describes the methane adsorption positions in coal pores as a three-dimensional space composed of adsorption equipotential surfaces with varying depths of potential well, which emphasizes the heterogeneous distribution of methane adsorption potential well depths in coal and accurately describes the spatial distribution and energy states of methane molecules during methane adsorption and desorption in naturally heterogeneous coal. By taking the residual sum of squares (RSS) and Pearson correlation coefficient as indicators, the fitting accuracies of the Langmuir model and the heterogeneous potential well model for isothermal adsorption and desorption curves are compared so that the superiority of the heterogeneous potential well model in describing the adsorption and desorption of methane in natural coal is confirmed.
View Article and Find Full Text PDFEnhanced CO₂ Photoreduction to Methane via Schottky Zn₃N₂/KPCN Heterojunctions for Sustainable Energy Applications.
Environ Res
January 2025
School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China. Electronic address:
The pressing necessity to mitigate climate change and decrease greenhouse gas emissions has driven the advancement of heterostructure-based photocatalysts for effective CO₂ reduction. This study introduces a novel heterojunction photocatalyst formed by integrating potassium-doped polymeric carbon nitride (KPCN) with metallic Zn₃N₂, synthesized via a microwave-assisted molten salt method. The resulting Schottky contact effectively suppresses the reverse diffusion of electrons, achieving spatial separation of photogenerated charges and prolonging their lifetime, which significantly enhances photocatalytic activity and efficiency.
View Article and Find Full Text PDFCryoelectron microscopy with elemental sensitivity.
Structure
January 2025
Structural Studies Division, MRC Laboratory of Molecular Biology, Cambridge CB2 0QH, UK. Electronic address:
In a recent issue of Nature Methods, Pfeil-Gardiner et al. (2024) combine electron energy-loss spectroscopy and single-particle cryoelectron microscopy to allow the spatially resolved imaging of the elemental composition of macromolecules.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!