To save content items to your account,
please confirm that you agree to abide by our usage policies.
If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account.
Find out more about saving content to .
To save content items to your Kindle, first ensure no-reply@cambridge.org
is added to your Approved Personal Document E-mail List under your Personal Document Settings
on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part
of your Kindle email address below.
Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations.
‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi.
‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
A finite-dimensional normed space is an inner product space if and only if the set of norming vectors of any endomorphism is a linear subspace. This theorem was proved by Sain and Paul for real scalars. In this paper, we give a different proof which also extends to the case of complex scalars.
The unprecedented popularity of Charles Dickens's first serial novel, The Posthumous Papers of the Pickwick Club (1836–37), among all classes of readers helped shape Britain's mass reading public. The irrevocable change that Dickens effected on Victorian print culture is well established, but there is little discussion of how his early works interpreted the print culture in which they first circulated. I approach Pickwick according to the perspective of a little-known contemporary response, “Sam Weller's Scrap Sheet (1837),” printed by John Cleave. “Sam Weller's Scrap Sheet” cleverly reproduces the narrative, form, and material of Pickwick according to the perspective of a laboring-class reader. Its attention to print material and class identity informs a new reading of Pickwick: in order to unify disparate reading and writing cultures, I argue, Pickwick fictively binds together materials sourced from a variety of print cultures and redefines them unanimously as “paper.” As the “Scrap Sheet” makes clear, this effaces the productive agency of the “papers’” originating contexts. Tying together discussions from Pickwick’s reception history, print history, and media studies, this paper more broadly examines the tensions that accompanied shifting relationships to material print in early-industrial England.
The focus of job satisfaction literature remains on the subordinate even though supervisors are responsible for evaluating employee performance, determining employee pay, raises, promotions, growth opportunities, etc., all of which impact employees’ subsequent performance that contributes (or not) to organizational success. Using a psychological contracts lens, we develop and test theoretical arguments predicting supervisors’ response to contributions is not uniformly positive depending on the type and amount of contribution involved. Across two studies, we ask supervisors to evaluate subordinates’ delivered contributions relative to promised contributions. Our results challenge the assumption that supervisors always desire larger amounts of work from their subordinates; excess contributions were associated with lower supervisors’ satisfaction with subordinates for some types of contributions. The results imply that subordinates’ contributions of work to supervisors may influence supervisors’ satisfaction with subordinates perhaps affecting their performance reviews and career opportunities.
The nonlinear stability of two-dimensional (2-D) plane Couette flow subject to a constant throughflow is analysed at finite and asymptotically large Reynolds numbers $\textit {Re}$. The speed of this throughflow is quantified by the non-dimensional throughflow number $\eta$. The base flow exhibits a linear instability provided $\eta \gtrsim 3.35$, with multi-deck upper and lower branch structures developing in the limit $1\ll \eta \ll \mathit {O}(\textit {Re})$. This instability provides a springboard for the computation of nonlinear travelling waves which bifurcate subcritically from the linear neutral curve, allowing us to map out a neutral surface at different values of $\eta$. Using strongly nonlinear critical layer theory, we investigate the waves that bifurcate from the upper branch at asymptotically large $\textit {Re}$. This asymptotic structure exists provided the throughflow number is larger than the critical value of $\eta _c\approx 1.20$ and is shown to give quantitatively similar results to the numerical solutions at Reynolds numbers of $\mathit {O}(10^5)$.
On July 28, 2022, eastern Kentucky experienced the state’s deadliest flood in recorded history. In response to ongoing mental health concerns from community members who survived the flood, local health department directors in affected communities requested technical assistance from the Kentucky Department for Public Health and the Centers for Disease Control and Prevention.
Methods
Two simultaneous Community Assessments for Public Health Emergency Response (CASPERs) were conducted 6 weeks after the flood. Four counties were assessed in each CASPER. EpiInfo7 was used to calculate the unweighted and weighted frequencies and percentages to estimate the number and percentage of households with a particular response in each CASPER.
Results
Approximately a third (30.5%) of households in CASPER 1 and approximately 40% of households in CASPER 2 reported experiencing ≥1 mental health problems. Individual-level mental health questions from a modified 3-stage CASPER found approximately 15% of persons in both CASPERs reported a Patient Health Questionnaire-2 (PHQ-2) score ≥3 and approximately 20% of persons in both CASPERs reported Generalized Anxiety Disorder-2 (GAD-2) score ≥3.
Conclusions
These findings indicated households experienced mental health problems after the flood. Depression and anxiety were prevalent among persons living in flood-affected areas. If ever needed, households preferred to receive mental health services in-person and locally.
A super-stable granular heap is a pile of grains whose free surface is inclined above the angle of repose, and which forms when particles are poured onto a plane that is confined laterally by frictional sidewalls that are separated by a narrow gap. During continued mass supply, the heap free surface gradually steepens until all the inflowing grains can flow out of the domain. As soon as the supply of grains is stopped, the heap is progressively eroded, and if the base of the domain is inclined above the angle of repose, then all the grains eventually flow out. This phenomenology is modelled using a system of two-dimensional width-averaged mass and momentum balances that incorporate the sidewall friction. The granular material is assumed to be incompressible and satisfy the partially regularized $\mu (I)$-rheology. This is implemented in OpenFOAM$^{\circledR}$ and compared against small-scale experiments that study the formation, steady-state behaviour and drainage of a super-stable heap. The simulations accurately capture the dense liquid-like flows as well as the evolving heap shape. The steady uniform flow that develops along the heap surface has non-trivial inertial number dependence through its depth. Super-stable heaps are therefore a sensitive rheometer that can be used to determine the dependence of the friction $\mu$ on the inertial number $I$. However, these flows are challenging to simulate because the free-surface inertial number is high, and can exceed the threshold for ill-posedness even for the partially regularized theory.
Brine shrimps (Artemia spp.) are aquatic crustaceans known as important intermediate hosts for a wide range of helminth species. From 2011 to 2021, 4,347 individuals of brine shrimp were collected for this study, investigating the diversity and infection rates of helminth species in Artemia spp. from hypersaline waters in southern and eastern Ukraine. Seven helminth species were found: six cestodes (Anomotaenia tringae, Eurycestus avoceti, Branchiopodataenia gvozdevi, Confluaria podicipina, Fimbriarioides tadornae, Hymenolepis s.l. stellorae) and one unidentified acuariid nematode (Acuariidae gen. sp.). All these helminths were recorded for the first time in intermediate hosts in Ukraine, although they had been known from other regions. Additionally, partial sequences of the 18S rDNA gene as well as the mitochondrial cytochrome c oxidase subunit 1 (cox1) and nicotinamide adenine dinucleotide dehydrogenase subunit 1 (nad1) genes were obtained for varying numbers of cestode and nematode isolates for the first time. The overall prevalence of helminth infection in Artemia spp. was 21.9%, and the intensity ranged from one to three specimens.
Compared with first-tier cities in China that are of abundant funds and resources like legions of high-level hospitals, the degree of nurses’ disaster nursing preparedness in non-first-tier cities (inland) is relatively lower. For example, nurses’ knowledge reserve of specific disasters is not comprehensive enough. And nurses are diffident when it comes to the skills of handling disaster rescue. Furthermore, their understanding of the roles to take in disaster coordination management is ambiguous. Conquering these challenges could be conducive to the improvement of local medical staffs’ confidence and capabilities in disaster relief. Consequently, the objective of this research is to probe for approaches of improving the strategies of disaster nursing in Chinese small cities.
Methods
In order to ascertain the factors that influence disaster preparedness, a cross-sectional study with SPSS 25.0 data analysis method is adopted. The sample of the study is nursing personnel from 4 comprehensive hospitals at or above the second level in Yongcheng, Henan Province, China, as nurses are first-line responders in disasters and pandemics and the largest group in disaster rescue.
Results
From 813 distributed questionnaires, 784 completed questionnaires were returned, for a response rate of 96.43%. The total average score of the Disaster Preparedness Evaluation Tool is 146.76 ± 34.98, and the average score of all the entries is 3.26 ± 0.45, indicating moderate performance. The results indicate that age affects post disaster management (P < 0.05), meaning that as age increases, the scores also tend to be higher. Work experience, professional titles, disaster relief experience, and disaster training significantly differ in terms of knowledge, skills, post disaster management, and total scores (P < 0.01). The result of multivariate analysis indicates that titles, disaster relief experiences, and disaster training are the main factors affecting the disaster preparedness of nurses in Chinese non-first-tier (inland) cities(P < 0.05).
Conclusions
For the sake of upgrading the efficiency of disaster nursing preparedness in Chinese non-first-tier (inland) cities with limited funds and resources, it is very important to formulate training and education methods that are suitable for the local area, conduct characteristic simulation exercises, and expand experience exchange between hospitals. It’s certain that the local government will also play an important role in coordinating and organizing the division of labor, resource allocation, and management of hospitals at all levels in different phases of disasters, which can help nursing staff have a clearer understanding of their roles when preparing for disasters.
Fires are among the most feared incidents that can occur in a hospital. Hospital fires will disrupt care continuity, may require the evacuation of patients and have the potential to result in injuries or even deaths. The aim of this study is to gain insight into hospital fires in the Netherlands over a 20-year period.
Methods
Systematic scoping review of news articles mentioning hospital fires in the Netherlands retrieved from the LexisNexis database, Google, Google News, PubMed, and EMBASE between 2000 and 2020. Hospital fires were included if they were associated with the closure of hospital departments or intervention units and/or evacuations. The cause, location, involved departments, need for evacuation, and the number of casualties were evaluated.
Results
Twenty-four major hospital fires were identified. More than half of these were caused by technical failures, and in 6 cases (25%), the fires were attributed to patients. In 71% of the incidents, acute care departments were affected by the fire. Twenty fires (83%) resulted in the evacuation of patients. In 2 cases, the fire resulted in the death of a patient.
Conclusions
Patient-attributed fires are a significant cause of major hospital fires in the Netherlands. Prevention and mitigation measures should be implemented accordingly.
The amplitude modulation coefficient, $R$, that is widely used to characterize nonlinear interactions between large- and small-scale motions in wall-bounded turbulence is not compatible with detecting the convective nonlinearity of the Navier–Stokes equations. Through a spectral decomposition of $R$ and a simplified model of triadic convective interactions, we show that $R$ suppresses the signature of convective scale interactions, but is strongly influenced by linear interactions between large-scale motions and the background mean flow. We propose an additional coefficient that is specifically designed for the detection of convective nonlinearities, and we show how this new coefficient, $R_T$, quantifies the turbulent kinetic energy transport involved in turbulent scale interactions and reveals a classical energy cascade across widely separated scales.
Disaster preparedness plays a vital role in mitigating risks and strengthening resilience of local communities in rural areas. This study examines the linkage between psychological factors and 4 kinds of disaster preparedness intentions and explores the challenges in translating intentions into actions.
Methods
This study utilized survey data from 325 households in Chongqing, China, that are threatened by geological disasters. We conducted empirical analysis using a regression model and carried out several robustness tests. The independent variables, psychological factors, are divided into risk appraisal, coping appraisal, and stakeholder appraisal. The dependent variable, disaster preparedness intentions, includes evacuation, disaster insurance, emergency supplies storage, and behaving eco-friendly.
Results
Multiple psychological factors have significant influence on disaster preparedness intentions, with varying impacts on different preparedness aspects. Social barriers—lack of capital, access, and triggers—hinder translating preparedness intentions into actions.
Conclusions
Our study integrates protection motivation theory and protective action decision model to understand psychological factors influencing disaster preparedness in rural China. We identify key factors significantly impact preparedness intentions and uncover barriers hindering the translation of intentions into actions. The findings underscore the importance of integrated approaches that bridge the gap between psychological awareness and the availability of resources, ultimately fostering a more resilient society in the face of disasters.
A common way of acquiring multiword expressions is through language input, such as during reading and listening. However, this type of learning is slow. Identifying approaches that optimize learning from input, therefore, is an important language-learning endeavor. In the present study, 85 learners of English as a foreign language read short texts with 42 figurative English phrasal verbs, repeated three times. In a counterbalanced design, we manipulated access to definitions (before text, after text, no definition) and typographic enhancement (with bolding, without bolding). The learning was measured by immediate and delayed gap-fill and meaning generation posttests. All posttests showed that learning with definitions was better than without, and that access to definitions after reading was more beneficial than before reading. Typographic enhancement effectively promoted contextual learning of phrasal verbs and increased the learning advantage associated with presenting definitions after reading.
We document significant increases in the suspension of ongoing drug projects following the passage of the Food and Drug Administration Amendments Act of 2007 (FDAAA), which mandates that pharmaceutical companies publicly disclose detailed clinical study results. Our results suggest a causal interpretation through difference-in-differences analyses that exploit variations in pre-FDAAA information environments. We also show evidence that fewer new projects are initiated after the FDAAA. Drug developers’ learning from peer failures is the primary mechanism, further amplified by financial constraints. We also examine the consequences of enhanced information disclosure, including changes in firm investment efficiency, drug quality, and disease morbidity.
The evolutionary process of mixing induced by Rayleigh–Taylor (RT) and Richtmyer–Meshkov (RM) instabilities typically progresses through three stages: initial instability growth, subsequent mixing transition and ultimate turbulent mixing. Accurate prediction of this entire process is crucial for both scientific research and engineering applications. For engineering applications, Reynolds-averaged Navier–Stokes (RANS) simulation stands as the most viable method currently. However, it is noteworthy that existing RANS mixing models are primarily tailored for the fully developed turbulent mixing stage, rendering them ineffective in predicting the crucial mixing transition. To address that, the present study proposes a RANS mixing transition model. Specifically, we extend the idea of the intermittent factor, which has been widely employed to integrate with turbulence models for predicting boundary layer transition, to mixing problems. Based on a high-fidelity simulation of a RT case, the intermittent factor defined based on enstrophy is extracted and then applied to RANS calculations, showing that it is possible to accurately predict mixing transition by introducing the intermittent factor to the turbulence production from the baseline K-L turbulence mixing model. Furthermore, to facilitate practical predictions, a transport equation has been established to model the spatio-temporal evolution of the intermittent factor. Coupled with the K-L model, the intermittent factor provided by the transport equation is applied to modify the Reynolds stress in RANS calculations. Thereafter, the present transition model has been validated in a series of tests, demonstrating its accuracy and robustness in the capturing mixing process in different types and stages of interfacial mixing flows.
Biped wall-climbing robots (BWCRs) serve as viable alternatives to human workers for inspection and maintenance tasks within three-dimensional (3D) curtain wall environments. However, autonomous climbing in such environments presents significant challenges, particularly related to localization and navigation. This paper presents a pioneering navigation framework tailored for BWCRs to navigate through 3D curtain wall environments. The framework comprises three essential stages: Building Information Model (BIM)-based map extraction, 3D climbing path planning (based on our previous work), and path tracking. An algorithm is developed to extract a detailed 3D map from the BIM, including structural elements such as walls, frames, and ArUco markers. This generated map is input into a proposed path planner to compute a viable climbing motion. For path tracking during actual climbing, an ArUco marker-based global localization method is introduced to estimate the pose of the robot, enabling adjustments to the target foothold by comparing desired and actual poses. The conducted experiments validate the feasibility and efficacy of the proposed navigation framework and associated algorithms, aiming to enhance the autonomous climbing capability of BWCRs.
Language is the primary technology clinical ethicists use as they offer guidance about norms. Like any other piece of technology, to use the technology well requires attention, intention, skill, and knowledge. Word choice becomes a matter of professional practice. The Brief Report offers clinical ethicists several reasons for rejecting the phrase “aggressive care.” Instead, ethicists should consider replacing “aggressive care” with the adjacent concept of a “recovery-focused path.” The virtues of this neologism include: the opportunity to set aside the emotion of “aggression,” the phrase’s accuracy when capturing the intention of the patient or their representative, and an unappreciated rhetorical force—and transparent logic—that arises when the patient’s recovery is unlikely.
The objective of this study was to develop a self-report scale for the assessment of the competence of pre-hospital health professionals in responding to radiological incidents.
Methods
Based on the findings of a systematic review analyzing the literature, the instrument followed the processes of item generation, expert opinion, language control, pilot study, and field testing.
Results
In the exploratory factor analysis, 48 items were excluded on the grounds of insufficient common variance (>0.40) and factor loading relationship (>0.50). The remaining 18 items (11 negative and 7 positive items) exhibited a Cronbach’s alpha value of 0.913 and a range of 0.740 to 0.887 in the sub-factors. As the scores on the developed scale increased, there was a corresponding increase in the perceived adequacy of the interventions.
Conclusions
The objective, scope, constraints and stages of the scale’s design and development were elucidated in comprehensive detail, and its intelligibility to other societies was ensured. The scale was developed as a self-report scale that can evaluate the competence of prehospital health professionals in radiological incidents.
In the Islamic tradition, there’s a long standing controversy over the relationship between God’s attributes and His essence, giving rise to diverse theories with significant theological implications. In one respect, these views are broadly categorizable into three: A1, the doctrine of divine complexity (DDC), A2, the doctrine of divine simplicity (DDS), and B, the doctrine of divine anonymity (DDA). The entry focuses on DDS, specifically explaining the Avicennian version, and defends it against some objections from some recent DDC proponents.
To assess the post-earthquake trauma and hopelessness levels of nursing students due to the earthquakes that occurred on February 6, 2023.
Methods
This study was conducted between April and May 2023 in the Nursing Department in a province located in Southeastern Türkiye using the face-to-face interview technique. The study was completed with 276 students in line with the power analysis. The data were collected using a questionnaire, the Scale that Determines the Level of Post-Earthquake Trauma (SDLPET), and the Beck Hopelessness Scale (BHS).
Results
The mean SDLPET and BHS scores of the students were 55.45±13.58 and 9.38±4.53, respectively. Some 12.3% of the nursing students lost their friends due to the earthquake, 80.4% did not receive any earthquake training, 46% needed psychological support, 48.6% needed financial support, 49.6% needed social support, 37% had sleep problems, 72.8% experienced hopelessness, and the quality of life of 67.8% of the students was negatively affected due to the hopelessness they experienced.
Conclusions
It was found that the level of post-earthquake trauma and hopelessness of the students was moderate, and a positive and significant correlation was found between trauma and hopelessness scores.