Hydrogels are commonly used in research and energy, manufacturing, agriculture, and biomedical applications. These uses typically require hydrogel mechanics and internal water transport, described by the poroelastic diffusion coefficient, to be characterized. Sophisticated indentation-based approaches are typically used for this purpose, but they require expensive instrumentation and are often limited to planar samples. Here, we present Shape Relaxation (SHARE), an alternative way to assess the poroelastic diffusion coefficient of hydrogel particles that is cost-effective, straightforward, and versatile. This approach relies on first indenting a hydrogel particle via swelling within a granular packing, and then monitoring how the indented shape of the hydrogel relaxes after it is removed from the packing. We validate this approach using experiments in packings with varying grain sizes and confining stresses; these yield measurements of the poroelastic diffusion coefficient of polyacrylamide hydrogels that are in good agreement with those previously obtained using indentation approaches. We therefore anticipate that the SHARE approach will find broad use in a range of applications of hydrogels and other swellable soft materials.Some micro-organisms and artificial micro-swimmers propel at low Reynolds numbers (Re) via the interaction of their flexible appendages with the surrounding fluid. While their locomotion has been extensively studied with a Newtonian fluid assumption, in realistic biological environments these micro-swimmers invariably encounter rheologically complex fluids. In particular, many biological fluids such as blood and different types of mucus have shear-thinning viscosities. The influence of this ubiquitous non-Newtonian rheology on the performance of flexible swimmers remains largely unknown. Here, we present a first study to examine how shear-thinning rheology alters the fluid-structure interaction and hence the propulsion performance of elastic swimmers at low Re. Via a simple elastic swimmer actuated magnetically, we demonstrate that shear-thinning rheology can either enhance or hinder elastohydrodynamic propulsion, depending on the intricate interplay between elastic and viscous forces as well as the magnetic actuation. We also use a reduced-order model to elucidate the mechanisms underlying the enhanced and hindered propulsion observed in different physical regimes. These results and improved understanding could guide the design of flexible micro-swimmers in non-Newtonian fluids.
Alarm fatigue among working nurses is a well-documented, high-priority safety issue. This article describes a study to learn whether alarm fatigue develops in undergraduate nursing student populations.
This longitudinal quantitative study employed survey data from a single cohort of nursing students in the Southeastern US over a period of 18 months to assess nursing students' level of sensitivity to alarms, including the call ****, bathroom, fall and safety, I.V. infusion pumps, and telemetry alarms.
These data were significant for I.V. https://www.selleckchem.com/products/azd1390.html infusion pump alarms and indicated a general decrease in sensitivity over an 18-month period. Nursing students with previous healthcare experience also noted decreased sensitivity to bathroom call bells and fall and safety alarms.
Alarm fatigue was recognized among the surveyed nursing students. Nurse educators also identified a performance-based strategy to increase student awareness of alarm fatigue and evidence-based strategies to minimize desensitization to alarms in both education and practice.
Alarm fatigue was recognized among the surveyed nursing students. Nurse educators also identified a performance-based strategy to increase student awareness of alarm fatigue and evidence-based strategies to minimize desensitization to alarms in both education and practice.
There may be some confusion regarding the use of supplemental oxygen in patients with chronic obstructive pulmonary disease (COPD) who are experiencing acute respiratory distress. This article addresses a common nursing misconception regarding the use of high-flow oxygen administration via non-rebreather masks instead of low-flow oxygen administration via nasal cannulas in patients with COPD who are in acute respiratory distress, an issue that was investigated in a simulation education exercise and survey of the nursing staff at the authors' facility.
There may be some confusion regarding the use of supplemental oxygen in patients with chronic obstructive pulmonary disease (COPD) who are experiencing acute respiratory distress. This article addresses a common nursing misconception regarding the use of high-flow oxygen administration via non-rebreather masks instead of low-flow oxygen administration via nasal cannulas in patients with COPD who are in acute respiratory distress, an issue that was investigated in a simulation education exercise and survey of the nursing staff at the authors' facility.
The National Council of State Boards of Nursing is changing its licensure exam to focus on a clinical judgment model. This article describes the current National Council Licensure Exam (NCLEX), the shift in focus from the nursing process to clinical judgment, and the intended emphasis of the next-generation NCLEX.
The National Council of State Boards of Nursing is changing its licensure exam to focus on a clinical judgment model. This article describes the current National Council Licensure Exam (NCLEX), the shift in focus from the nursing process to clinical judgment, and the intended emphasis of the next-generation NCLEX.
The conditions under which people live and work and how those conditions affect health are known as social determinants of health. They are impacted by disparities of wealth, opportunity, and other societal resources. This article examines how these disparities have influenced morbidity and mortality in minority people of color during the COVID-19 pandemic.
The conditions under which people live and work and how those conditions affect health are known as social determinants of health. They are impacted by disparities of wealth, opportunity, and other societal resources. This article examines how these disparities have influenced morbidity and mortality in minority people of color during the COVID-19 pandemic.
Hydrogels are commonly used in research and energy, manufacturing, agriculture, and biomedical applications. These uses typically require hydrogel mechanics and internal water transport, described by the poroelastic diffusion coefficient, to be characterized. Sophisticated indentation-based approaches are typically used for this purpose, but they require expensive instrumentation and are often limited to planar samples. Here, we present Shape Relaxation (SHARE), an alternative way to assess the poroelastic diffusion coefficient of hydrogel particles that is cost-effective, straightforward, and versatile. This approach relies on first indenting a hydrogel particle via swelling within a granular packing, and then monitoring how the indented shape of the hydrogel relaxes after it is removed from the packing. We validate this approach using experiments in packings with varying grain sizes and confining stresses; these yield measurements of the poroelastic diffusion coefficient of polyacrylamide hydrogels that are in good agreement with those previously obtained using indentation approaches. We therefore anticipate that the SHARE approach will find broad use in a range of applications of hydrogels and other swellable soft materials.Some micro-organisms and artificial micro-swimmers propel at low Reynolds numbers (Re) via the interaction of their flexible appendages with the surrounding fluid. While their locomotion has been extensively studied with a Newtonian fluid assumption, in realistic biological environments these micro-swimmers invariably encounter rheologically complex fluids. In particular, many biological fluids such as blood and different types of mucus have shear-thinning viscosities. The influence of this ubiquitous non-Newtonian rheology on the performance of flexible swimmers remains largely unknown. Here, we present a first study to examine how shear-thinning rheology alters the fluid-structure interaction and hence the propulsion performance of elastic swimmers at low Re. Via a simple elastic swimmer actuated magnetically, we demonstrate that shear-thinning rheology can either enhance or hinder elastohydrodynamic propulsion, depending on the intricate interplay between elastic and viscous forces as well as the magnetic actuation. We also use a reduced-order model to elucidate the mechanisms underlying the enhanced and hindered propulsion observed in different physical regimes. These results and improved understanding could guide the design of flexible micro-swimmers in non-Newtonian fluids.
Alarm fatigue among working nurses is a well-documented, high-priority safety issue. This article describes a study to learn whether alarm fatigue develops in undergraduate nursing student populations.
This longitudinal quantitative study employed survey data from a single cohort of nursing students in the Southeastern US over a period of 18 months to assess nursing students' level of sensitivity to alarms, including the call bell, bathroom, fall and safety, I.V. infusion pumps, and telemetry alarms.
These data were significant for I.V. https://www.selleckchem.com/products/azd1390.html infusion pump alarms and indicated a general decrease in sensitivity over an 18-month period. Nursing students with previous healthcare experience also noted decreased sensitivity to bathroom call bells and fall and safety alarms.
Alarm fatigue was recognized among the surveyed nursing students. Nurse educators also identified a performance-based strategy to increase student awareness of alarm fatigue and evidence-based strategies to minimize desensitization to alarms in both education and practice.
Alarm fatigue was recognized among the surveyed nursing students. Nurse educators also identified a performance-based strategy to increase student awareness of alarm fatigue and evidence-based strategies to minimize desensitization to alarms in both education and practice.
There may be some confusion regarding the use of supplemental oxygen in patients with chronic obstructive pulmonary disease (COPD) who are experiencing acute respiratory distress. This article addresses a common nursing misconception regarding the use of high-flow oxygen administration via non-rebreather masks instead of low-flow oxygen administration via nasal cannulas in patients with COPD who are in acute respiratory distress, an issue that was investigated in a simulation education exercise and survey of the nursing staff at the authors' facility.
There may be some confusion regarding the use of supplemental oxygen in patients with chronic obstructive pulmonary disease (COPD) who are experiencing acute respiratory distress. This article addresses a common nursing misconception regarding the use of high-flow oxygen administration via non-rebreather masks instead of low-flow oxygen administration via nasal cannulas in patients with COPD who are in acute respiratory distress, an issue that was investigated in a simulation education exercise and survey of the nursing staff at the authors' facility.
The National Council of State Boards of Nursing is changing its licensure exam to focus on a clinical judgment model. This article describes the current National Council Licensure Exam (NCLEX), the shift in focus from the nursing process to clinical judgment, and the intended emphasis of the next-generation NCLEX.
The National Council of State Boards of Nursing is changing its licensure exam to focus on a clinical judgment model. This article describes the current National Council Licensure Exam (NCLEX), the shift in focus from the nursing process to clinical judgment, and the intended emphasis of the next-generation NCLEX.
The conditions under which people live and work and how those conditions affect health are known as social determinants of health. They are impacted by disparities of wealth, opportunity, and other societal resources. This article examines how these disparities have influenced morbidity and mortality in minority people of color during the COVID-19 pandemic.
The conditions under which people live and work and how those conditions affect health are known as social determinants of health. They are impacted by disparities of wealth, opportunity, and other societal resources. This article examines how these disparities have influenced morbidity and mortality in minority people of color during the COVID-19 pandemic.
0 Comments
0 Shares
42 Views
0 Reviews
