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While research on leadership and employee physical ill-being is burgeoning, the short- and long-term mechanisms through which leadership influences employee physical ill-being remain underexplored. This research, grounded in leadership theories and the Job Demand-Resource (JD-R) theory, examines how transformational and abusive leadership behaviors influence employee physical ill-being through two conflict-related negative motivational mechanisms (negative work–home interactions and job role conflict) and two negative affective mechanisms representing short-term (negative affect) and long-term (burnout) mechanisms. Employing a three-wave longitudinal design over 6 months (N = 234), our findings from a multilevel path analysis revealed that transformational and abusive leadership had respectful, negative and positive effects on employee physical ill-being via conflict-related negative motivational mechanisms and short- and long-term affective mechanisms. Notably, the influence of leadership behaviors on employee physical ill-being was more pronounced through the short-term affective mechanism (negative affect) than the long-term affective mechanism (burnout). Our findings provide a nuanced understanding of how leadership behaviors affect employee physical ill-being over time, shedding light on the dynamic interplay of motivational and affective pathways in this relationship.
Movement disorders (Parkinson’s disease, essential tremor, dystonia) are debilitating, progressive conditions that profoundly impact patients’ quality of life. Surgical therapies, such as deep brain stimulation (DBS) can provide tremendous relief to patients but remain costly and, therefore, limited in availability. It is critical to understand regional barriers to accessing this service to improve access for all patients who may benefit from it.
Methods:
This is a mixed methods survey of stakeholders (patients/family members, advocacy groups, family physicians, neurologists, neurosurgeons) assessing perceived barriers to DBS for movement disorders. Closed and open-ended questions were used. Descriptive statistics were used to highlight regions of Canada where perceived access is poor and to identify barriers to access.
Results:
A total of 220 responses were recorded (12 neurosurgeons, 22 neurologists, 30 family physicians, 153 patients and caregivers and 3 advocacy group personnel). Themes included limited resources/centralization of resources, education, burdensome referral patterns and personal patient factors. Barriers included costs associated with travel, waitlists, lack of specific resources and poor understanding of movement disorders, DBS indications and referral pathways.
Conclusions:
A number of barriers to access to DBS have been identified, related to geography and centralization of services, referrals and need for further education of indications and safety. The use of virtual care, centralized referral pathways and further research to determine the true prevalence of candidates for this therapy are required to improve access to DBS for movement disorders in Canada.
In 1120 Notre Dame of Paris received a fragment of the True Cross from a former canon, Ansel, who had joined the First Crusade and become cantor of the Holy Sepulchre. The history of the relic was sought out, documented, inserted into the liturgy and in time revised according to political and cultural developments. This article reconstructs the story of the relic's arrival in Paris, and the way in which, through the successive narratives attached to it, it slowly gained and grew in meaning, giving definition to the Church of Paris and ultimately to the kingdom of France.
Crowdy et al. (2023 Phys. Rev. Fluids, vol. 8, 094201), recently showed that liquid suspended in the Cassie state over an asymmetrically spaced periodic array of alternating cold and hot ridges such that the menisci spanning the ridges are of unequal length will be pumped in the direction of the thermocapillary stress along the longer menisci. Their solution, applicable in the Stokes flow limit for a vanishingly small thermal Péclet number, provides the steady-state temperature and velocity fields in a semi-infinite domain above the superhydrophobic surface, including the uniform far-field velocity, i.e. pumping speed, the key engineering parameter. Here, a related problem in a finite domain is considered where, opposing the superhydrophobic surface, a flow of liquid through a microchannel is bounded by a horizontally mobile smooth wall of finite mass subjected to an external load. A key assumption underlying the analysis is that, on a unit area basis, the mass of the liquid is small compared with that of the wall. Thus, as shown, rather than the heat equation and the transient Stokes equations governing the temperature and flow fields, respectively, they are quasi-steady and, as a result, governed by the Laplace and Stokes equations, respectively. Under the further assumption that the ridge period is small compared with the height of the microchannel, these equations are resolved using matched asymptotic expansions which yield solutions with exponentially small asymptotic errors. Consequently, the transient problem of determining the velocity of the smooth wall is reduced to an ordinary differential equation. This approach is used to provide a theoretical demonstration of the conversion of thermal energy to mechanical work via the thermocapillary stresses along the menisci.
We derive a depth-averaged model consistent with the $\mu (I)$ rheology for an incompressible granular flow down an inclined plane. The first two variables of the model are the depth and the depth-averaged velocity. The shear is also taken into account via a third variable called enstrophy. The obtained system is a hyperbolic system of conservation laws, with an additional equation for the energy. The system is derived from an asymptotic expansion of the flow variables in powers of the shallow-water parameter. This method ensures that the model is fully consistent with the rheology. The velocity profile is a Bagnold profile at leading order and the first-order correction to this profile can be calculated for flows that are not steady uniform. The first-order correction to the classical granular friction law is also consistently written. As a consequence, the instability threshold of the steady uniform flow is the same for the depth-averaged model and for the governing equations. In addition, a higher-order version that contains diffusive terms is also presented. The spatial growth rate, the phase velocity and the cutoff frequency of the version with diffusion are in good agreement with the experimental data and with the theoretical predictions for the rheology. The mathematical structure of the equations enables us to use well-known and stable numerical solvers. Numerical simulations of granular roll waves are presented. The model has the same limitations as the $\mu (I)$ rheology, in particular for the solid/ liquid and liquid/gas transitions, and needs therefore a regularisation for these transitions.
Consider nested subdivisions of a bounded real set into intervals defining the digits $X_1,X_2,\ldots$ of a random variable X with a probability density function f. If f is almost everywhere lower semi-continuous, there is a non-negative integer-valued random variable N such that the distribution of $R=(X_{N+1},X_{N+2},\ldots)$ conditioned on $S=(X_1,\ldots,X_N)$ does not depend on f. If also the lengths of the intervals exhibit a Markovian structure, $R\mid S$ becomes a Markov chain of a certain order $s\ge0$. If $s=0$ then $X_{N+1},X_{N+2},\ldots$ are independent and identically distributed with a known distribution. When $s>0$ and the Markov chain is uniformly geometric ergodic, there is a random time M such that the chain after time $\max\{N,s\}+M-s$ is stationary and M follows a simple known distribution.
Using Alabama as a case study of the beauty industry, this paper will demonstrate how licensing laws and regulations affected barbers and beauticians as they struggled to gain more clientele than their competitors. In the early twentieth century, white men dominated the market for cutting hair. Though the process started mid-century, by 1980, that relationship was inverted as women found themselves far outnumbering men. This research helps explain the gendered inversion of labor market trends while providing more general insights into the role of licensing laws in labor markets. Importantly, this work explores how race shaped labor market regulations, which affected and continue to affect labor markets and individual businesses in important ways.
The goal of this paper is to explain the multivariate causes of this important labor market reversal using an analysis of race, gender, and political economy. It will argue that the advocacy for restrictive licensing laws and regulations, the failure to innovate and adapt to new styles in hair, and the racial and gendered makeup of the Barbers, Beauticians, and Allied Industries (BBAI) led to the ultimate failure of the union and the overall decrease in barbers during the latter half of the twentieth century. On the other hand, the degree to which black women were represented on licensing boards and played a role in the unique structure of cosmetology groups and unions led and contributed to the proliferation of cosmetologists during the same period.
How do race, ethnicity, and gender shape a legislator’s approach to bill sponsorship and cosponsorship? This paper examines how institutional marginalization influences the legislative strategies of racial and gender minority representatives. Constrained by systemic barriers that limit their ability to sponsor legislation, minority legislators prioritize cosponsorship to achieve policy goals, build coalitions, and demonstrate responsiveness to their constituencies. Using the quasi-experimental context of the 2016 and 2018 U.S. congressional elections, I apply the synthetic difference-in-differences estimator and find that minority legislators sponsor fewer bills but cosponsor significantly more than their non-Hispanic White counterparts. Additionally, race-gendered effects reveal that women of color sponsor significantly less legislation than non-minority legislators and men of color. These patterns cannot be explained by factors like freshman status or primary election competitiveness. The findings highlight the strategic adaptations of minority legislators to navigate structural inequities and amplify their legislative influence. This study is the first to use a causal inference approach to explore the intersection of race, gender, and sponsorship and cosponsorship of congressional bills, contributing to a deeper understanding of legislative behavior among marginalized groups.
Kawasaki disease, an acute systemic small- and medium-vessel vasculitis, is mostly detected in children under 5 years old.
Objective:
We aimed to explore the predictive value of long non-coding ribonucleic acid small nucleolar RNA host gene 5 (SNHG5) and microRNA (miRNA)-27a for the effect of standard intravenous immunoglobulintherapy on children with Kawasaki disease.
Methods:
The study included 182 children undergoing standard intravenous immunoglobulin therapy for Kawasaki disease and another 182 healthy children receiving physical examinations as a control group. LncRNA SNHG5 and miRNA-27a expression levels were determined at admission.
Results:
The ineffective group had higher levels of interleukin-6, C-reactive protein, procalcitonin, lncRNA SNHG5, and miRNA-27a and Kobayashi score than those of the effective group (P < 0.05). Multivariate regression analysis showed that Kobayashi score, interleukin-6, C-reactive protein, procalcitonin, lncRNA SNHG5, and miRNA-27a were associated with the treatment outcomes (P < 0.05). LncRNA SNHG5 and miRNA-27a levels were positively correlated with Kobayashi score, interleukin-6, receiver operating characteristic and procalcitonin levels (r > 0, P < 0.05). High Kobayashi score and levels of interleukin-6, c-reactive roe, procalcitonin, lncRNA SNHG5, and miRNA-27a were influencing factors for treatment failure (odds ratio > 1, P < 0.05). The areas under the curves of lncRNA SNHG5, miRNA-27a, and their combination were 0.757, 0.766, and 0.831, respectively.
Conclusion:
LncRNA SNHG5 and miRNA-27a are highly expressed in children with Kawasaki disease, and their levels are closely correlated with the efficacy of standard immunoglobulin therapy.
The formation of Kelvin–Helmholtz-like rollers (referred to as K–H rollers) over riblet surfaces has been linked to the drag-increasing behaviour seen in certain riblet geometries, such as sawtooth and blade riblets, when the riblet size reaches sufficiently large viscous scales (Endrikat et al. (2021a), J. Fluid Mech. 913, A37). In this study, we focus on the sawtooth geometry of fixed physical size, and experimentally examine the response of these K–H rollers to further increases in viscous scaled riblet sizes, by adopting the conventional approach of increasing freestream speeds (and consequently, the friction Reynolds number). Rather than continual strengthening, the present study shows a gradual weakening of these K–H rollers with increasing sawtooth riblet size. This is achieved by an analysis of the roller geometric characteristics using both direct numerical simulations and hot-wire anemometry databases at matched viscous scaled riblet spacings, with the former used to develop a novel methodology for detecting these rollers via streamwise velocity signatures (e.g. as acquired by hot wires). Spectral analysis of the streamwise velocity time series, acquired within riblet grooves, reveals that the frequencies (and the streamwise wavelengths) of the K–H rollers increase with increasing riblet size. Cross-correlation spectra, estimated from unique two-point hot-wire measurements in the cross-plane, show a weakening of the K–H rollers and a reduction in their wall-normal coherence with increasing riblet size. Besides contributing to our understanding of the riblet drag-increasing mechanisms, the present findings also have implications for the heat transfer enhancing capabilities of sawtooth riblets, which have been associated previously with the formation of K–H rollers. The present study also suggests conducting future investigations by decoupling the effects of viscous scaled riblet spacing and friction Reynolds numbers, to characterise their influence on the K–H rollers independently.
In this article, we deal with non-existence results, i.e., Liouville type results, for positive radial solutions of quasilinear elliptic equations with weights both in the entire $\mathbb R^N$ and in a ball, in the latter case under Dirichlet boundary conditions. The presence of weights, possibly singular or degenerate, makes the study fairly delicate. The proofs use a Pohozaev type identity combined with an accurate qualitative analysis of solutions. In the last part of the article, a non-existence theorem is proved for a Dirichlet problem with a convection term.
This research note presents the results of audit studies that were conducted with the constituency offices of provincial and federal elected representatives across Canada. We investigate whether individuals from ethnic minority groups, the LGBTQ+ community and French or English speakers are discriminated against when contacting their constituency office for administrative services. Survey experiments administered to both candidates of the 2021 Canadian election and a representative sample of Canadian citizens complement these studies. Our results indicate the absence of discrimination towards constituents from an ethnic minority or who identify with the LGBTQ+ community. We found, however, that emails sent in French were less likely to be answered by Members of Parliament (MPs) than those sent in English. Constituency offices of anglophone MPs and those representing ridings with a small proportion of francophones were significantly less likely to respond to French emails. A similar pattern, albeit more moderate, is observed among constituency offices of francophone MPs in response to English emails. The survey experiments show similar discrimination from citizens but less so from candidates.
This article discusses Ovid’s allusive engagement in Tr. 1.2.75–80 with his own earlier works, as well as with the works of his elegiac predecessors—Propertius and Tibullus—and of Catullus. It is argued that this suggestive intertextuality may point toward Ovid’s re-articulation of his conceptualization of elegy as it is now to be written from exile.
The concept of grafting—described by Gal (2018) as the use of authoritative discourses in distinct, inapposite arenas—is a significant contribution to understanding how individual speech events contribute to processes of enregisterment. While scholars thus far have concentrated on graftings in written and non-interactive texts, this focus occludes the emergent particulars of graftings as they are produced extemporaneously, within local contexts. In this analysis, I examine graftings in public comments during American public school board meetings held from March 2021 through January 2022, a period marked by contentious debates. A sequential analysis of graftings preceded by constructed dialogue contributes a novel view of graftings as interactional achievements. Their citation of prior talk within local contexts not only constructs sequences but also emphasizes that their authority is constructed locally. This analysis therefore expands our understanding of graftings as emergent interactional devices, used within the immediacy of ongoing discourse. (Interdiscursivity, intertextuality, constructed dialogue, reported speech, discourse analysis, sequential analysis, school board meetings)*
We conduct direct numerical simulations to investigate the synchronisation of Kolmogorov flows in a periodic box, with a focus on the mechanisms underlying the asymptotic evolution of infinitesimal velocity perturbations, also known as conditional leading Lyapunov vectors. This study advances previous work with a spectral analysis of the perturbation, which clarifies the behaviours of the production and dissipation spectra at different coupling wavenumbers. We show that, in simulations with moderate Reynolds numbers, the conditional leading Lyapunov exponent can be smaller than a lower bound proposed previously based on a viscous estimate. A quantitative analysis of the self-similar evolution of the perturbation energy spectrum is presented, extending the existing qualitative discussion. The prerequisites for obtaining self-similar solutions are established, which include an interesting relationship between the integral length scale of the perturbation velocity and the local Lyapunov exponent. By examining the governing equation for the dissipation rate of the velocity perturbation, we reveal the previously neglected roles of the strain rate and vorticity perturbations, and uncover their unique geometrical characteristics.
The association between salt and salted food consumption and oral, pharyngeal, and oesophageal cancers remains inconclusive. To address this, we conducted a large-scale nationwide cohort study in Japan, a region globally recognised for its high-salt consumption. In a baseline survey conducted from 1988 to 1990, salt consumption was evaluated using a self-administered food frequency questionnaire in a sample of 42,535 participants aged 40–79 years. Over a median 14.4-year follow-up period, 145 incident cases of oral (n=43), pharyngeal (n=17), and oesophageal (n=85) cancers were observed. A Cox proportional hazards model was used to estimate the hazard ratio (HR) and 95% confidence interval (CI) after adjusting for age, sex, smoking status, alcohol consumption, and fruit and vegetable consumption. High-salt consumption was associated with a higher risk of oral, pharyngeal, and oesophageal cancers combined; the multivariable HR for the highest versus lowest tertiles of salt consumption was 1.67 (95% CI: 1.08–2.61, P-trend = 0.01). An excess risk was primarily observed for oral and oesophageal cancers. Among the salt sources, miso soup consumption was positively associated with the combined risk of oral, pharyngeal, and oesophageal cancers; however, the consumption of other high-salt foods was not. In conclusion, high-salt consumption was associated with a higher combined risk of oral, pharyngeal, and oesophageal cancers.