21 research outputs found
Implications of Idealism on Science
No full textArgumentative essay on the implications of Idealism in science.AgoraCopyright held by authors.IdealismScienceAgora 202
Mitigating violence against nurses through trauma-informed security
No full textThe concerning surge in workplace violence against nurses indicates a significant threat to the
safety of nurses. This study used a mixed-methods design and a pragmatic worldview to
critically appraise secondary data on how trauma-informed security can reduce violence against
nurses. The scope of this research study was limited to the healthcare security discipline and
focused on the current threats of violence against nurses, its implications on healthcare safety
and security, and the principles of trauma-informed security. The primary research question of
this study aimed to determine “How might trauma-informed security reduce violence against
nurses?” A correlation between trauma, hospitalization, and acts of violence and aggression was
reported in this study. The themes explored in the literature suggested several factors related to
workplace violence that impact the safety of nurses, the need for improved interprofessional
relationships between nurses and security officers, and, importantly, the need for traumainformed
hospital security practices and policies. This study advocates for hospital security
practices and policies to be grounded on the principles of trauma-informed security and for
further research on the benefits of transitioning towards a trauma-informed healthcare security
model that improves the safety and security of security officers and nurses.trauma-informed security; trauma; healthcare security officers; nurses; workplace violence; de-escalation; hospital security practices and policie
Opportunities for drug-delivery research in nutraceuticals and functional foods?
No full textAuthor has checked copyrightSB. 13/6/201
SPECTROSCOPY OF INORGANIC NITRATES.
No full textAuthor Institution: Department of Chemistry, Louisiana State UniversityComputations of a Mulliken-Wolfsberg-Helmholtz type, carried to self-consistency of the density matrix, were performed for nitrate ion, nitrate ion-metal complexes, and aquated nitrate ion-metal complexes. Potential energy curves for the nitrate inversion were also generated and will be correlated with Walsh's rules and the spectroscopy of the ion. Solvent effects will also be discussed
The Lateral and Post-Impact Residual Lateral Strength of Reinforced Concrete Columns
No full textLateral load resistance tests were conducted on 24 concrete columns with various reinforcement configurations and sizes by the author. Of these specimens, 13 were previously subjected to impact loading by Abdallah et al. and were used to evaluate the post-impact performance and lateral load capacity retention. From these tests it was determined that the CFST specimens exhibited both the largest lateral and residual lateral capacities of 37.37 kN and 40.17 kN, respectively. The CFST member had the highest retention of lateral load capacity for both low and high impact energy, retaining 75% and 107% of the capacity of the unimpacted specimen, respectively. Increasing the specimen diameter had no discernible effect on lateral strength retention but reduced the residual deformation especially at high impact energies with the residual deformation being reduced as much as 85% compared to the smaller specimen
Author Correction: Digital automation of transdermal drug delivery with high spatiotemporal resolution
No full textAuthor Correction to "Digital automation of transdermal drug delivery with high spatiotemporal resolution
Geomorphic risk maps for river migration using probabilistic modeling: A framework
No full textLateral migration of meandering rivers poses erosional risks to human settlements, roads, and infrastructure in alluvial floodplains. While there is a large body of scientific literature on the dominant mechanisms driving river migration, it is still not possible to accurately predict river meander evolution over multiple years. This is in part because we do not fully understand the relative contribution of each mechanism and because deterministic mathematical models are not equipped to account for stochasticity in the system. Besides, uncertainty due to model structure deficits and unknown parameter values remains. For a more reliable assessment of risks, we therefore need probabilistic forecasts. Here, we present a workflow to generate geomorphic risk maps for river migration using probabilistic modeling. We start with a simple geometric model for river migration, where nominal migration rates increase with local and upstream curvature. We then account for model structure deficits using smooth random functions. Probabilistic forecasts for river channel position over time are generated by Monte Carlo runs using a distribution of model parameter values inferred from satellite data. We provide a recipe for parameter inference within the Bayesian framework. We demonstrate that such risk maps are relatively more informative in avoiding false negatives, which can be both detrimental and costly, in the context of assessing erosional hazards due to river migration. Our results show that with longer prediction time horizons, the spatial uncertainty of erosional hazard within the entire channel belt increases – with more geographical area falling within 25 % < probability < 75 %. However, forecasts also become more confident about erosion for regions immediately in the vicinity of the river, especially on its cut-bank side. Probabilistic modeling thus allows us to quantify our degree of confidence – which is spatially and temporally variable – in river migration forecasts. We also note that to increase the reliability of these risk maps, we need to describe the first-order dynamics in our model to a reasonable degree of accuracy, and simple geometric models do not always possess such accuracy.Rivers, Ports, Waterways and Dredging Engineerin
Dataset to accompany publication: Imaging solvated oxygen atoms with a femtosecond laser
No full textThis dataset includes the measurements that accompany the manuscript "Imaging solvated oxygen atoms with a femtosecond laser", available at https://doi.org/10.1038/s41467-025-66196-8. Imaging of solvated oxygen atoms was performed using femtosecond two-photon absorption laser-induced fluorescence (TALIF), where the fluorescence signal was collected using an ICCD camera (Princeton Instruments). The ICCD images included in the dataset can be used to reproduce all figures in the text of the manuscript and the density calibration for atomic oxygen, as outlined in the README. Additional details regarding the analysis of the ICCD images or the density calibration can be provided upon request to the corresponding author.
The abstract for the accepted manuscript is as follows:
As a powerful oxidant, atomic oxygen (O) holds considerable promise for a variety of biomedical and industrial applications. However, the inability to quantify solvated oxygen atoms has prevented the determination of the fundamental parameters governing its behaviour in relevant aqueous environments. Here, we directly image ground-state oxygen atoms in water using femtosecond two-photon absorption laser-induced fluorescence. Measurements show that oxygen atoms persist for tens of microseconds in water, penetrating hundreds of micrometres into the liquid. This observed longevity has significant implications, suggesting a need to re-evaluate existing models of solvated atomic oxygen reactivity and transport. Beyond atomic oxygen, this technique is broadly applicable to other solvated atomic species of interest, including nitrogen (N) and hydrogen (H). This work establishes that radical atomic species can be quantified in liquid with ultrafast laser spectroscopy, providing the basis for the determination of key properties including reaction rates, chemical lifetimes, and Henry’s law constants.SPC-P
Dataset to accompany publication: Investigating the effects of plasma-activated water on E. coli with the novel application of single-cell impedance flow cytometry
No full textThis dataset includes the impedance measurements that accompany the manuscript "Investigating the effects of plasma-activated water on E. coli with the novel application of single-cell impedance flow cytometry", available at https://doi.org/10.1038/s41598-025-09069-w. These measurements were performed with a X30 single-cell impedance flow cytometer from Amphasys, and are used to produce figures 7 and 8 in the main text. By applying the three-shell dielectric model of E. coli described in the manuscript, the dielectric dispersion curves shown in figures 9 and 10 can also be generated from this data. Finally, from the dielectric dispersion curves, a genetic algorithm can be used to establish the subcellular dielectric parameters of the populations (figure 11). More details regarding the Sobol sensitivity analysis, three-shell dielectric model, or genetic algorithm described in the manuscript can be provided upon request to the corresponding author.
The abstract for the accepted manuscript is as follows:
Single-cell impedance flow cytometry (IFC) is a rapid, label-free diagnostic capable of resolving the dielectric properties of individual cells. Here, single-cell IFC is employed to investigate the effects of plasma-activated water (PAW) on E. coli. This diagnostic makes use of the frequency-dependent dielectric response of cells. By recording the dielectric spectra of E. coli, the subcellular dielectric properties can be estimated. Following exposure to PAW, significant shifts in the phase angle of the impedance of E. coli were observed compared to untreated populations. The phase shift increased with frequency and when cells were exposed to PAW with higher concentrations of reactive species. A reduction in the amplitude of the impedance signal was also noted, corresponding to a decrease in cell volume. After signal calibration with stationary-phase E. coli and a three-shell dielectric model, a sensitivity analysis and genetic algorithm were used to find the relevant subcellular dielectric parameters. The results show that the conductivity of the outer membrane, periplasm, and cytoplasm change considerably in response to PAW treatment. This indicates that PAW modifies multiple layers of the cell simultaneously and that the inactivation pathway of PAW-treated E. coli is likely not confined to a single subcellular layer. For the first time, this study demonstrates that single-cell IFC can extract meaningful and detailed information about the cellular response to plasma treatment in an efficient and label-free manner. This establishes it as a promising diagnostic for uncovering the mechanisms of a variety of biological applications of low-temperature plasmas. SPC-PPSPC-LTP2
Dataset to accompany publication: Helium metastable density determination in the COST reference source by absolutely calibrated optical emission spectroscopy
No full textThis dataset includes the spectra that accompany the manuscript "Helium metastable density determination in the COST reference source by absolutely calibrated optical emission spectroscopy", available at https://doi.org/10.1063/5.0218352. The spectra can be used to reproduce figures 4, 5, 7, 8, and 9 in the main text with the appropriate collisional-radiative model and absolute calibration. The data supporting the collisional-radiative model is derived from open sources such as the EEDF program and LxCat and can be provided upon request to the corresponding author. The spectra in this dataset were collected with an ESA 4000 echelle spectrometer and are contained in two zip files corresponding to the admixture and power sweep as detailed in the manuscript. The spectra themselves are in .spa files where the first column is the wavelength and the second the intensity. The .spa files can be opened directly in MATLAB.
The abstract for the accepted manuscript is as follows:
Helium metastable densities in the COST Reference Microplasma Jet are estimated for a variety of He/N2 admixtures and dissipated powers by applying a collisional-radiative model to absolutely calibrated optical emission spectroscopy measurements. This is accomplished by delineating the excitation mechanisms that result in the N2(C–B) and N2+(B–X) emission bands, the latter of which is strongly coupled to the presence of helium metastables. A number of other plasma parameters are established and discussed for each operating condition including the electron energy distribution function, reduced electric field, rate constants, and electron density. With these parameters, the reaction rates for the primary ionization pathways are also calculated, emphasizing the importance of helium metastables for discharge sustainment. Good agreement with existing literature is found for most plasma parameters and for helium metastable densities in particular. A clear [N2]−1 relationship between the nitrogen concentration and density of helium metastables is demonstrated, as has been identified in previous studies in analogous atmospheric pressure plasma jets. This validates the efficacy of this optical technique for determining helium metastable densities and establishes it as a viable, and in many cases, more accessible alternative to other means of quantifying helium metastables in low-temperature plasmas.SPC-PP
