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Recent years have seen the emergence of new technologies that exploit nanoscale evaporation, ranging from nanoporous membranes for distillation to evaporative cooling in electronics. Despite the increasing depth of fundamental knowledge, there is still a lack of simulation tools capable of capturing the underlying non-equilibrium liquid–vapour phase changes that are critical to these and other such technologies. This work presents a molecular kinetic theory model capable of describing the entire flow field, i.e. the liquid and vapour phases and their interface, while striking a balance between accuracy and computational efficiency. In particular, unlike previous kinetic models based on the isothermal assumption, the proposed model can capture the temperature variations that occur during the evaporation process, yet does not require the computational resources of more complicated mean-field kinetic approaches. We assess the present kinetic model in three test cases: liquid–vapour equilibrium, evaporation into near-vacuum condition, and evaporation into vapour. The results agree well with benchmark solutions, while reducing the simulation time by almost two orders of magnitude on average in the cases studied. The results therefore suggest that this work is a stepping stone towards the development of an accurate and efficient computational approach to optimising the next generation of nanotechnologies based on nanoscale evaporation.
This study investigated the relationship between various intrapersonal factors and the discrepancy between subjective and objective cognitive difficulties in adults with attention-deficit hyperactivity disorder (ADHD). The first aim was to examine these associations in patients with valid cognitive symptom reporting. The next aim was to investigate the same associations in patients with invalid scores on tests of cognitive symptom overreporting.
Method:
The sample comprised 154 adults who underwent a neuropsychological evaluation for ADHD. Patients were divided into groups based on whether they had valid cognitive symptom reporting and valid test performance (n = 117) or invalid cognitive symptom overreporting but valid test performance (n = 37). Scores from multiple symptom and performance validity tests were used to group patients. Using patients’ scores from a cognitive concerns self-report measure and composite index of objective performance tests, we created a subjective-objective discrepancy index to quantify the extent of cognitive concerns that exceeded difficulties on objective testing. Various measures were used to assess intrapersonal factors thought to influence the subjective-objective cognitive discrepancy, including demographics, estimated premorbid intellectual ability, internalizing symptoms, somatic symptoms, and perceived social support.
Results:
Patients reported greater cognitive difficulties on subjective measures than observed on objective testing. The discrepancy between subjective and objective scores was most strongly associated with internalizing and somatic symptoms. These associations were observed in both validity groups.
Conclusions:
Subjective cognitive concerns may be more indicative of the extent of internalizing and somatic symptoms than actual cognitive impairment in adults with ADHD, regardless if they have valid scores on cognitive symptom overreporting tests.
This essay reflects the journey of two business scholars, Stephen X. Zhang and Jiyao Chen, who ventured into mental health research during the COVID-19 pandemic. We experienced first-hand how health sciences have operated their publication systems in ways that uphold scientific standing while addressing real-world problems. In doing so, we found the publishing expectations and norms in health and medical sciences to be vastly different from those in management. This essay further discusses aspects such as the preference for evidence over theory, the relationship with basic sciences, diverse evaluation criteria, encouragement of exploration and replication, timeliness, and democratization and inclusivity of scholarship as concrete steps of responsible research.
The Chinese Loess Plateau (CLP), recognized as the world's largest loess plateau, has been a subject of ongoing debate regarding the continuity of its sedimentary loess sequence due to its intricate depositional environment. In this study, we conducted dating on a 9.8-m-long Malan loess core obtained from the Sanmen Gorge in the southern CLP using optically stimulated luminescence (OSL). The OSL dates indicate loess deposition between 52.4 and 11.3 ka, with no apparent hiatus on a millennial scale, and a sedimentation rate (SR) exhibiting six distinct episodes. Additionally, a comprehensive review of 613 OSL ages from 18 sections at 14 sites across the CLP was conducted. The results reveal loess deposition at most sites shows no apparent hiatus on a millennial scale over the past 60 ka, except for two specific locations. High SR episodes during Marine Isotope Stage (MIS) 3 across the CLP were attributed to heightened dust emissions from the source region and an enhanced dust deposition efficiency, while MIS 2 deposits were influenced by an intensified East Asian winter monsoon. Low SR episodes during MIS 1 at most sites were likely associated with reduced atmospheric transportation and pedogenesis. Spatially heterogeneous SR variations across the CLP might be influenced by local depositional environments.
Sanctuary cities define themselves as metropoles that refuse to share information, personnel, and facilities with federal immigration authorities to police immigrants. While research suggests that sanctuary cities contest the criminalization of migration, a growing literature depicts how these urban sanctuaries could, in practice, perpetuate hierarchies and exclusionary politics against noncitizens. Yet, most of these studies conceive of urban sanctuary as local policies designed to challenge federal power and, thus, fail to fully capture how sanctuary policies could actually rely on the criminalization of migration to govern cities’ political problems. Drawing upon 1,900 pages of archival materials and 100 newspaper articles, this article takes the case of Chicago to study how and why the urban sanctuary expands immigrants’ rights while reinforcing policing with punitive implications for Latino “undeserving” noncitizens. As a form of racialized governance, I argue that Chicago’s sanctuary policies activate a set of punitive exceptions that—in response to distinct political urgencies—allow law and immigration enforcement to converge and control Latino undocumented workers, “criminals,” and “gangs.” This study not only challenges the premise that sanctuary cities necessarily resist federal power but also illustrates how they could strengthen the legitimacy of the state and racialized police power.
Severe weather events exacerbate existing health disparities due to poorly managed non-communicable diseases (NCDs). Our objective is to understand the experiences of staff, providers, and administrators (employees) of Federally Qualified Health Centers (FQHCs) in Puerto Rico and the US Virgin Islands (USVI) in providing care to patients living with NCDs in the setting of recent climate-related extreme events.
Methods
We used a convergent mixed-methods study design. A quantitative survey was distributed to employees at 2 FQHCs in Puerto Rico and the USVI, assessing experience with disasters, knowledge of disaster preparedness, the relevance of NCDs, and perceived gaps. Qualitative in-depth interviews explored their experience providing care for NCDs during recent disasters. Quantitative and qualitative data were merged using a narrative approach.
Results
Through the integration of quantitative and qualitative data, we recognize: (1) significant gaps in confidence and preparedness of employees with a need for more training; (2) challenges faced by persons with multiple NCDs, especially cardiovascular and mental health disorders; and (3) most clinicians do not discuss disaster preparedness with patients but recognize their important role in community resilience.
Conclusion
With these results, we recommend strengthening the capacity of FQHCs to address the needs of their patients with NCDs in disasters.
Whether colliding drops will merge with or bounce off each other is critical to numerous processes, and the physics involved is notoriously complex. In particular, experiments show that both sufficiently slow and fast head-on drop collisions lead to merging, but that there is often an intermediate regime in which bouncing is observed; these transitions in behaviour were recently discovered to be surprisingly sensitive to the radius of the drops and the ambient gas pressure. We show here that these transitions between bouncing and merging are governed by nanoscale phenomena; namely, gas-kinetic and disjoining pressure effects. To capture these crucial effects, a novel, open-source computational model is developed for the simulation of colliding drops. The model uses a hybrid approach, based on solving the Navier–Stokes equations in the drop with a lubrication approach for the unconventional physics of the gas film. Our simulations show remarkably good agreement with experiments of head-on collisions and also provide new experimentally verifiable predictions.
This study investigated the mental health significance of Barack Obama’s 2012 presidential re-election among Blacks. Upon his re-election, we hypothesized Blacks would either feel symbolic empowerment or relative deprivation. They would feel symbolic empowerment because a man who identifies as Black won re-election to the nation’s highest office. His second victory should generate optimism, given his status as a historic first. Alternatively, they would feel relative deprivation because The Great Recession from 2007 to 2009 curtailed what Obama could achieve. More important, he withered when afforded opportunities to challenge White supremacy and championed individual responsibility. Using a quasi-experimental design with nationally representative survey data from the 2012 Behavioral Risk Factor Surveillance System (BRFSS), we predicted Blacks’ preelection and postelection poor mental health days. We found no time period main effects. However, Black men with less than a college degree experienced 1.11 more poor mental health days postelection whereas Black men with a college degree or more experienced 2.93 fewer poor mental health days postelection. These findings support relative deprivation theory.
The expeditions removing and excavating antiquities at the site of Xanthos in Lycia (1841–4) have been highlighted by scholars as setting a new precedent for whole-sale collection from a single site, and the support – through the national museum and the Royal Navy – of the British government for archaeological endeavours. Questions remain, however, regarding the failure of the first mission to remove the antiquities. According to the current narrative, the blame rests on the navy officer assigned to support Charles Fellows. Based on archival research, this article presents the concerns that Commander Thomas Graves had with the undertaking. His perspective sheds new light on how ill-planned the initial attempts were, and consequently how much was learned. The obstacles encountered in the first Xanthos expedition spurred developments in archaeological practice, introduced by people of non-academic professions.
Research connects health outcomes to hazard exposures but often neglects the nature of the exposure or repeated events.
Methods
We undertook a cross-sectional study (N = 1,094) from a representative sample in the Houston Metropolitan Statistical Area (HMSA). Respondents were recruited using Qualtrics panels, targeting individuals reflecting the population of the HMSA. Physical composite scores (PCS) were calculated using the SF-12v2.
Results
Among the hazards (hurricanes, flooding, tornadoes, chemical spills, industrial fires), only chemical spills showed a dose-response: physical health scores declined significantly with repeated exposures. This decline persisted after multiple linear regression. Covariates including sex, race, age, education, and chemical exposure affected PCS, but chemical spill exposure remained the most significant, negatively affecting PCS even after adjusting for other factors (coef =–2.24, 95% CI, –3.33 to –1.15).
Conclusion
Grasping the effects of hazards, especially repeated ones, can guide emergency management in mitigation, recovery, and preparedness efforts.
Globally, women experience poverty at disproportionate rates to men, with the situation being worse for Indigenous women and women of colour. Social security systems are one avenue for income redistribution that can alleviate poverty. However, such systems are themselves embedded within and produced by unequal social relations, meaning they can also serve to perpetuate and exacerbate social inequalities. This is exemplified under neoliberal welfare reforms, which have disproportionate negative impacts for women across the world (e.g. increased poverty and stigma, reduced health/wellbeing, and more). Again, this is particularly the case for Indigenous women and women of colour.
In this article, we offer an intersectional feminist analysis of an intensive form of neoliberal welfare conditionality, Australia’s ‘compulsory income management’ program (CIM). CIM quarantines social security incomes onto cashless bank cards to restrict expenditure to ‘approved’ items. Drawing on interviews and surveys with 170 individuals who have personally experienced CIM, we show that it has myriad negative impacts that are especially borne by (Indigenous) women. These are not, we argue, unintended policy impacts, but are instead symptomatic of the gendered and racialised violence that is woven into patriarchal capitalism more broadly. Thus, the experience of CIM holds lessons for welfare states internationally.
The previously unindexed laboratory X-ray powder diffraction data of mosapride dihydrogen citrate dihydrate, an API used to stimulate gastrointestinal motility, has been recorded at room temperature. Using these data, the crystal structure of this API has been refined in space group P21/c (No. 14) with a = 18.707(4) Å, b = 9.6187(1) Å, c = 18.2176(4) Å, β = 114.164(1)°, V = 2990.74(8) Å3, and Z = 4. The structure of this material corresponds to the phase associated with CSD Refcode LUWPOL determined at 93 K. The Rietveld refinement, carried out with TOPAS-Academic, proved the single nature of the sample and the quality of the data recorded.
To ensure whether spaced education, which increases long-term knowledge retention, could be integrated into auditor competency assessment.
Design:
Quality improvement project.
Setting:
Academic, freestanding children’s hospital.
Participants:
Hand hygiene (HH) auditors.
Intervention:
We enrolled trained HH auditors in an online spaced-education platform to assess mastery of knowledge, delivering 46 unique questions at spaced intervals followed by rationale; we retired questions after 3 correct answers. An e-mailed 10-item survey gauged participant satisfaction with the program. The Wilcoxon signed-rank test was used to compare change in median knowledge score from first to final attempt.
Results:
A total of 12,120 questions were attempted by 126 auditors, and 49 (39%) completed the entire course. Median knowledge score increased significantly by 10.5 percentage points (IQR 4–15) between first and final attempts (P < 0.001). Thirty auditors (27%) responded to the survey. The majority agreed the number and complexity of questions were appropriate (57% and 67%, respectively). Eighty-seven percent reported the platform easy to navigate, and 77% agreed adequate time was provided for completion. Free-text suggestions included delivering fewer questions at a narrower spacing interval over a shorter time frame because of competing work demands.
Conclusions:
Auditor knowledge of HH indications and technique is critical to ensuring data validity. A spaced-education competency program improved HH auditor knowledge in the short term. Completion rate was low, and some participants expressed a desire for fewer questions over a shorter time frame. This study offers insight into ways to optimize spaced education as a potential tool for HH competency assessment.
Patients undergoing maintenance hemodialysis face heightened vulnerability during disasters like tropical cyclones, yet there is sparse research on their treatment-related challenges and countermeasures. This scoping review aims to highlight the issues maintenance hemodialysis patients encounter following tropical cyclones.
Methods
A systematic scoping review of 19 articles from 2000 to 2023 was conducted, evaluating eligibility against predefined criteria.
Results
Hemodialysis patients encounter substantial challenges during and after tropical cyclones in the United States, Puerto Rico, Australia, and Taiwan. Thematic analysis identified 3 themes related to “challenges” (Hemodialysis health-related challenges, socially relevant challenges, and challenges of management inefficiencies). “Recommendations” comprised 4 themes and 4 phases across the “mitigation phase” (fortifying healthcare infrastructure and mobilizing community-focused risk mitigation initiatives), “preparedness” (emergency plan development, training, and patient education), “response” (activation of emergency plans and providing emergency healthcare services), and “recovery” (intersectoral collaboration for recovery and rebuilding).
Conclusion
This scoping review underscores challenges confronted by patients undergoing maintenance hemodialysis post-tropical cyclones, highlighting the urgent need for targeted strategies to ensure the continuity of dialysis care during and after such disasters.
A high-resolution numerical simulation of an air–water turbulent upward bubbly flow in a pipe is performed to investigate the turbulence characteristics and bubble interaction with the wall. We consider three bubble equivalent diameters and three total bubble volume fractions. The bulk and bubble Reynolds numbers are $Re_{bulk}= u_{bulk} D/\nu _w = 5300$ and $Re_{bub}= (\langle u_{bub}\rangle - u_{bulk}) d_{eq}/\nu _w = 533\unicode{x2013}1000$, respectively, where $u_{bulk}$ is the water bulk velocity, $\langle u_{bub}\rangle$ is the overall bubble mean velocity, $D$ is the pipe diameter and $\nu _w$ is the water kinematic viscosity. The mean water velocity near the wall significantly increases due to bubble interaction with the wall, and the root-mean-square water velocity fluctuations are proportional to $\bar {\psi }(r)^{0.4}$, where $\bar {\psi } (r)$ is the mean bubble volume fraction. For the cases considered, the bubble-induced turbulence suppresses the shear-induced turbulence and becomes the dominant flow characteristic at all radial locations including near the wall. Rising bubbles near the wall mostly bounce against the wall rather than slide along the wall or hang around the wall without collision. Low-speed streaks observed in the near-wall region in the absence of bubbles nearly disappear due to the bouncing bubbles. These bouncing bubbles generate counter-rotating vortices in their wake, and increase the skin friction by sweeping high-speed water towards the wall. We also suggest an algebraic Reynolds-averaged Navier–Stokes model considering the interaction between shear-induced and bubble-induced turbulence. This model provides accurate predictions for a wide range of liquid bulk Reynolds numbers.
In 1975, the Ugandan state established an Economic Crimes Tribunal to investigate and penalize smuggling, hoarding, overcharging, and other commercial malfeasance. In the coming years, innumerable Ugandans were arrested and charged with contravening the state's economic regulations. Prior observers have seen this as another instance of a capricious state, but in this article, I demonstrate the popular investment in economic regulation. Ugandans demanded better stewardship of money and things because they were aghast at the ungovernable world of commodities. For one thing, the inaccessibility of so-called “essential commodities” — sugar and salt, preeminently — impeded ethical expectations surrounding social reproduction, hospitality, and masculine respectability. More troubling, essential commodities were not completely unavailable; rather, they were available on exclusionary and confusing terms. Relative deprivation was more upsetting than absolute scarcity because it offended a sense of consumptive entitlement. As a result, it was not only the state that accused citizens of economic crimes. There were widespread accusations in which allegation and denunciation circulated among neighbors, families, and bureaucrats in an urgent effort to discipline commodities and people.
Postcolonial governments often restrict the market alienability of land rights for various policy reasons. One policy aims to treat all citizens equivalently and safeguard vulnerable social communities equally, as an unrestrained land market could allow one affluent social group to buy out one that is less affluent. Another policy is to set a standard that is easy to apply in the same way in every case, as a bright-line rule banning land alienation is simpler to administer than a standard that requires case-by-case considerations. Today, in Ethiopia, such laws face opposition from proponents of a free market economy and private property rights. Thus, international development institutions and influential Ethiopians are spearheading an ambitious reform to Ethiopia’s post-socialist law that bans land alienability, arguing that the law has impeded social and economic progress. This article shows, however, that the legal ban has never prevented land transfers. Many people have utilized legal constructs such as gifts, bequests, loans, and leases to sell their land. Such transfers have circumvented the ban amidst aggressive land expropriation by the state and other agents. These intricate local and national dynamics undercut the misleading sense of regularity created by the inalienability law, raising serious questions about the persistent demand by international development institutions to privatize land rights and create land markets through law reform without paying close attention to the lived experiences at the local level.