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The task given to me for this issue was to discuss the history, challenges, and accomplishments of the History of Economics Society (HES) as I see them from my vantage point as a past president. I frame my remarks in terms of changes I believe have occurred in how our field has been pursued in the society since I became involved.
Three different porous substrates (with different pore sizes, $s$, and permeabilities, $K$) are used to examine their effect on the structure of boundary layer flow over them. The flow is characterised with single-point hot-wire measurements as well as planar particle image velocimetry. In order to elucidate differences in shallow and deep flows past porous substrates, foams with two different thicknesses ($h$) are used (for all three substrates). A wide range of friction Reynolds numbers ($2000< Re_\tau <13\,500$) and permeability-based Reynolds numbers ($1< Re_K< 50$) are attained. For substrates with $Re_K \sim 1$, the flow behaviour remains similar to flow over impermeable smooth walls and as such Townsend's hypothesis remains valid. Very large-scale motions are observed over permeable foams even when the $Re_K > 1$. In contrast, a substantial reduction in velocity disturbances and associated length scales is achieved for permeable foams with intermediate values of pore density and relative foam thickness ($h/s$), which affects outer-layer similarity. As permeability is increased by increasing pore size, the foam becomes sparse relative to viscous scales at high Reynolds numbers. For such foams, the flow conforms to outer-layer similarity and is more akin to flow over rough surfaces. Permeability attenuates the wavelengths associated with the outer-layer peak.
In magnetoconvection, the flow of an electromagnetically conductive fluid is driven by a combination of buoyancy forces, which create the fluid motion due to thermal expansion and contraction, and Lorentz forces, which distort the convective flow structure in the presence of a magnetic field. The differences in the global flow structures in the buoyancy-dominated and Lorentz-force-dominated regimes lead to different heat transport properties in these regimes, reflected in distinct dimensionless scaling relations of the global heat flux (Nusselt number $Nu$) versus the strength of buoyancy (Rayleigh number $Ra$) and electromagnetic forces (Hartmann number $Ha$). Here, we propose a theoretical model for the transition between these two regimes for the case of a static vertical magnetic field applied across a convective fluid layer confined between two isothermal, a lower warmer and an upper colder, horizontal surfaces. The model suggests that the scaling exponents $\gamma$ in the buoyancy-dominated regime, $Nu\sim Ra ^\gamma$, and $\xi$ in the Lorentz-force-dominated regime, $Nu\sim (Ha^{-2}Ra)^\xi$, are related as $\xi =\gamma /(1-2\gamma )$, and the onset of the transition scales with $Ha^{-1/\gamma }Ra$. These theoretical results are supported by our direct numerical simulations for $10\leq Ha\leq 2000$, Prandtl number $Pr=0.025$ and $Ra$ up to $10^9$ and data from the literature.
To report a single-centre experience in the endoscopic carbon dioxide laser-assisted approach to glomus tympanicum tumours.
Methods
A retrospective case review was conducted of patients diagnosed with class A1 to B1 glomus tympanicum tumours who underwent exclusive transcanal endoscopic carbon dioxide laser surgery.
Results
Seven patients fulfilled the inclusion criteria. All patients (100 per cent) were women, with a mean age of 65.4 years (standard deviation, 13.6). There were five A2 tumours, one A1 tumour and one B1 tumour. One patient presented with a delayed tympanic membrane perforation needing myringoplasty on follow up. There were no substantial post-operative complications. The mean hospitalisation time was 9.5 hours (standard deviation, 9.8). The mean follow-up period was 32.7 months (standard deviation, 13.1), with all cases having resolution of pulsatile tinnitus and no tumour recurrence.
Conclusion
The study provides further evidence on the safety and efficacy of endoscopic carbon dioxide laser surgery as a minimally invasive technique for treating early-stage glomus tympanicum tumours.
We report numerical simulations confirming the predictions in Gordillo & Riboux (J. Fluid Mech., vol. 941, 2022, A10), where we elucidated the lubrication mechanism by which a drop of a low-viscosity liquid impacting over a smooth solid substrate skates over a thin gas film that prevents contact with the wall. Moreover, with the purpose of explaining the so-called lift-off mechanism reported in Kolinski et al. (Phys. Rev. Lett., vol. 112, issue 13, 2014, 134501), we extend our previous findings and derive expressions for the time-varying thickness of the gas layer at the region where the distance to the wall is minimum, finding good agreement with the numerical results. In addition, we report that our predictions for the minimum thickness of the gas film separating a falling drop from a wall at room temperature follow closely the experimental values when gas kinetic effects are retained in the analysis, and also report that the analogous equation for the minimum thickness of the vapour layer formed after a drop impacts a superheated wall predicts well the experimental measurements.
Few studies have examined the psychometric properties of the Connor-Davidson Resilience Scale (CD-RISC) in a large adolescent community sample, finding a significant disparity. This study explores the psychometric properties of the CD-RISC among Spanish adolescents by means of exploratory factor analysis (EFA), Rasch analysis, and measurement invariance (MI) across sex, as well as internal consistency and criterion validity. The sample was comprised of 463 adolescents (231 girls), aged 12 to 18 years, who completed the CD-RISC and other measures on emotional status and quality of life. The EFA suggested that the CD-RISC structure presented a unidimensional model. Consequently, shorter unidimensional CD-RISC models observed in the literature were explored. Thus, the Campbell-Sills and Stein CD–RISC–10 showed the soundest psychometric properties, providing an adequate item fit and supporting MI and non-differential item functioning across sex. Item difficulty levels were biased toward low levels of resilience. Some items showed malfunctioning in lower response categories. With regard to reliability, categorical omega was. 82. Strong associations with health-related quality of life, major depressive disorder symptoms, and emotional symptoms were observed. A weak association was found between resilience and the male sex. Campbell-Sills and Stein’s CD–RISC–10 model emerges as the best to assess resilience among Spanish adolescents, as already reported in adults. Thus, independently of the developmental stage, the core of resilience may reside in the aspects of hardiness and persistence.
The loss of a scalpel or a needle during surgery can threaten the health of the patient and lead to additional costs, and radiographical assistance during surgery has been the only recovery method. This study evaluates the efficacy of a metal detector compared with conventional radiology for recovering a needle lost in the oropharynx during surgery.
Method
Different fragment sizes of needles normally used in pharyngoplasty were embedded at different locations and depths in a lamb's head. Three experienced and three junior otolaryngologists searched for the needle fragments using a metal detector and conventional radiology.
Results
All fragments were found with each method, but the mean searching time was 90 per cent shorter with the metal detector.
Conclusion
A metal detector can be a useful tool for locating needles that break during ENT surgery, as it requires less time than conventional radiology and avoids exposing patients to radiation.
Dual anterior interventricular artery is a rare type of CHD. We reported a fifteen-year-old girl who underwent CT angiography that demonstrated one anterior interventricular artery from aorta and another from pulmonary artery.
We show that a heating pattern applied to a surface with a corrugation pattern generates a propulsive effect. The same heating pattern applied to a smooth surface creates propulsion through nonlinear thermal streaming associated with pitchfork bifurcation. The combination of groove and heating patterns generates thermal drift, representing a forced response whose magnitude changes with the relative position of both patterns. Thermal drift is always present, while thermal streaming requires sufficiently intense heating. When both effects are active, a change in the relative position of these patterns produces rapid changes in the magnitude of propulsion, resulting in the formation of limit points. The strength of propulsion increases with a decrease in the Prandtl number and with an addition of uniform heating.
Contrary to the widespread view that Hegel excluded Africa from what he called world history proper, the specifically African element of Egypt was indispensable to his account of the pivotal dialectical moment that saw spirit's release from its immersion in nature. Hegel's racist caricature of Africans in the early part of the lectures was not gratuitous, something that commentators can leave to one side. It was integral to his dialectical account of world history because it served to generate the contradiction that saw the Persian Empire give way to Greece. This understanding is confirmed by the newly completed four-volume edition of Hegel's Lectures on the Philosophy of World History in the Gesammelte Werke. These new volumes also enable us to gain critical insight into how the editors of the first two published versions of the lectures, Eduard Gans and Karl Hegel, sought in their different ways to shape the reception of Hegel's lectures.
Rhinitis medicamentosa poses a therapeutic challenge for both patients and physicians. Treatment strategies vary, starting with avoidance of decongestants, followed by medications or surgical intervention. This study aimed to compare two treatment strategies for this condition.
Methods
A review was conducted of patients diagnosed with rhinitis medicamentosa from 2013 to 2021, who were managed conservatively with medications or surgically by inferior turbinate reduction.
Results
Forty-seven patients were included: 21 patients were treated conservatively and 26 underwent turbinate reduction. Following surgical therapy, the frequency of using decongestants was significantly reduced (p < 0.001), with a significant improvement in Sino-Nasal Outcome Test-22 scores (p < 0.001). The conservative treatment group was significantly older with more co-morbidities. Following medical therapy, the conservative treatment group had a significant decrease in the frequency of decongestant use, but there was no significant improvement in their Sino-Nasal Outcome Test-22 scores.
Conclusion
Compared to conservative treatment, inferior turbinate reduction for rhinitis medicamentosa resulted in reduced decongestant use and improved quality of life.
The preference for particles to accumulate at specific regions in the near-wall part is a widely observed phenomenon in wall-bounded turbulence. Unlike small particles more frequently found in low-speed streaks, finite-size particles can accumulate in either low-speed or high-speed streaks. However, mechanisms and influencing factors leading to the different preferential concentration locations still need to be clarified. The present study conducts particle-resolved direct numerical simulations of particle-laden turbulent channel flows to provide a better understanding of this seemingly puzzling behaviour of preferential accumulation. These simulations cover different particle-to-fluid density ratios, particle volume fractions, particle sizes and degrees of sedimentation intensity. We find that the large particle size is the crucial factor that results in particles accumulating in high-speed streaks. Large particles not only are difficult to be conveyed by the quasi-streamwise vortices to low-speed streaks but also can escape from the near-wall region before moving spanwisely out from high-speed streaks. The sedimentation effect allows particles to gather closer to the channel wall and stay longer in the near-wall regions, reinforcing the sweeping mechanism of quasi-streamwise vortices that transport particles from high- to low-speed streaks. As a result, sedimenting particles tend to accumulate in the low-speed streaks.
We introduce a class of Falconer distance problems, which we call of restricted type, lying between the classical version and its pinned variant. Prototypical restricted distance sets are the diagonal distance sets, k-point configuration sets given by
for a compact $E\subset \mathbb {R}^d$ and $k\ge 3$. We show that $\Delta ^{\mathrm{diag}}(E)$ has non-empty interior if the Hausdorff dimension of E satisfies (0.1)
We prove an extension of this to $C^\omega $ Riemannian metrics g close to the product of Euclidean metrics. For product metrics, this follows from known results on pinned distance sets, but to obtain a result for general perturbations g, we present a sequence of proofs of partial results, leading up to the proof of the full result, which is based on estimates for multilinear Fourier integral operators.
The main goal of the present research is to develop and validate the Perceived Economic Inequality Scale (PEIS), an instrument measuring individuals’ perceptions of economic inequality at the national level. The study was conducted on a representative sample of the Italian population (N = 1,446, 51% women). The factorial structure of the scale was assessed through cross-validated exploratory-confirmatory factor analyses. To inspect the PEIS psychometric properties, item and correlation analyses were performed. The results showed that the PEIS is a valid and reliable unidimensional measure of perceived economic inequality at the national level. Further support of the PEIS construct validity was provided by the correlation of the scale score with the perceived wage gap and ideological beliefs like the economic system justification, social dominance orientation, meritocratic beliefs, and participants’ political orientation. Crucially, multigroup confirmatory factor analysis supported configural, metric, and scalar invariances of the scale across socio-demographic groups. The PEIS allows researchers to assess the subjective component of economic inequality by also serving as a useful tool for unpacking the psychological correlates of perceived inequality.
Examining oral argument in the Australian High Court and comparing to the U.S. Supreme Court, this article shows that institutional design drives judicial interruptive behavior. Many of the same individual- and case-level factors predict oral argument behavior. Notably, despite orthodoxy of the High Court as “apolitical,” ideology strongly predicts interruptions, just as in the United States. Yet, important divergent institutional design features between the two apex courts translate into meaningful behavioral differences, with the greater power of the Chief Justice resulting in differences in interruptions. Finally, gender effects are lower and only identifiable with new methodological techniques we develop and apply.
Generalizability of extant findings about media treatment of women in politics is uncertain because most research examines candidates for the legislature or heads of government, and little work moves beyond Anglo-American countries. We examine six presidential cabinets in Costa Rica, Uruguay, and the United States, which provide differing levels of women’s incorporation into government. These cases permit us to test hypotheses arguing that differences in media treatment of men and women cabinet ministers will decrease as women’s inclusion in government expands, and that media treatment of women is more critical when women head departments associated with masculine gender stereotypes. Results show that greater incorporation of women into government is associated with fewer gendered differences in media coverage, tone of minister coverage is more favorable for women who hold masculine stereotyped portfolios, and that the media does present qualifications of women cabinet ministers.
QUALIS is a research project that studies ‘the other side of courts’ by looking at the working conditions of judicial professions in Portugal and their impacts on the profession, health, family and personal life. The objective of this article is to provide an overview of the results obtained, based mainly on the interviews and the online questionnaire administered to the Portuguese judicial professions (judges, public prosecutors and court clerks). The questionnaire was sent to all professionals (more than 10,000) working in the courts and had a good response rate; the interviews were conducted among the three judicial professions. The article focuses on three main dimensions of working conditions, namely physical environment, working time and work intensity, and work/social environment of professionals working at first instance courts. It will make then a further analysis of their impacts in the health and well-being and in the work-family conflict of the judicial professionals.
Status epilepticus (SE) is a neurological emergency characterized by prolonged seizures. However, the incidence of first-episode SE is unclear, as estimates vary greatly among studies. Additionally, SE risk factors have been insufficiently explored. Therefore, the objectives of this study were to estimate the incidence of first-episode SE in Ontario, Canada, and estimate the associations between potential sociodemographic and health-related risk factors and first-episode SE.
Methods:
We conducted a population-based retrospective cohort study using linked health administrative datasets. We included individuals who completed Canada’s 2006 Census long-form questionnaire, lived in Ontario, were between 18 and 105, and had no history of SE. A Cox proportional hazards regression model was used to estimate the hazard ratios for SE within three years associated with each potential risk factor.
Results:
The final sample included 1,301,700 participants, 140 of whom were hospitalized or had an emergency department visit for first-episode SE during follow-up (3.5 per 100,000 person-years). Older age was the only significant sociodemographic SE risk factor (HR = 1.35, 95% CI = 1.33, 1.37), while health-related risk factors included alcohol or drug abuse (HR = 1.05, 95% CI = 1.02, 1.08), brain tumour or cancer (HR = 1.14, 95% CI = 1.12, 1.15), chronic kidney disease (HR = 1.32, 95% CI = 1.29, 1.36), dementia (HR = 1.42, 95% CI = 1.36, 1.48), diabetes (HR = 1.11, 95% CI = 1.09, 1.12), epilepsy or seizures (HR = 1.05, 95% CI = 1.01, 1.09) and stroke (HR = 1.08, 95% CI = 1.05, 1.11).
Conclusion:
The estimated incidence of SE in a sample of Ontario residents was 3.5 per 100,000 person-years. Older age and several comorbid conditions were associated with higher first-episode SE risk.