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In the Sámi worldview, reindeer herders perceive the herd as a social unit consisting of individuals who vary in characteristics and social roles. Age, sex, physical appearance, personality and other social roles are acknowledged and recognized by the herders, who maintain their relationships with animals in different ways within herding tasks. Archaeological data, too, show that ancient reindeer herders were in contact with different kinds of reindeer, including wild reindeer, working reindeer and ‘ordinary’ herd reindeer. This paper uses zooarchaeological and ethnoarchaeological perspectives to examine the variety of life on the hoof at two fourteenth- to seventeenth-century Sámi sites in northern Finland. Archaeological data and zooarchaeological analyses will be used to assess hunting and herding practices as well as the characteristics of herd structure. Ultimately, the aim of this paper is to examine critically and characterize the variety of the relations prevailing between reindeer and ancient Sámi herders, thus contributing both to the study of culturally specific ontologies and the analytical possibilities of archaeological research to understand such ontologies.
Electrical effects are known to play an important role in particle-laden flows, yet a holistic view of how they modulate turbulence remains elusive due to the complexity of multifield coupling. Here, we present a total of 119 direct numerical simulations of particle-laden turbulent channel flow that reveal a striking ability of electrical effects to induce turbulence relaminarisation and markedly alter wall drag. As expected, the transition from turbulence to laminar flow is accompanied by abrupt changes in the statistical properties of both the fluid and particulate phases. Nevertheless, with increasing electrical effects, the wall-normal profiles of the mean streamwise fluid velocity and mean local particle mass loading exhibit opposite trends in the turbulent and laminar regimes, arising from the competition between turbophoresis and electrostatic drift. We identify three distinct flow regimes resulting from the electrical effects: a drag-reduced turbulent regime, a drag-reduced laminar regime, and a drag-enhanced laminar regime. It is revealed that relaminarization originates from the complete suppression of the streak breakdown in the near-wall self-sustaining cycle, followed by the sequential inhibition of other subprocesses in the cycle. In the turbulent regime, increasing electrical effects induce opposing trends in Reynolds and particle stress contributions to drag, yielding a non-monotonic drag response. In laminar regimes, by contrast, the drag coefficient increases monotonically as the Reynolds stress vanishes and particle-induced stress becomes dominant.
The present study examined developmental pathways beginning in pregnancy and extending into early childhood that contribute to child emotion regulation (ER). Leveraging data from a sample of 157 mixed-sex couples, who largely identified as White and non-Hispanic/Latino, and their typically developing children (50.3% female), we examined whether parental emotion-related socialization behaviors (ERSBs; i.e., general emotion talk, specific supportive and nonsupportive responses to children’s negative emotions) at preschool age (child age 3) mediated the link between parental trauma-related distress spanning pregnancy to toddler age (2-years postpartum) and child maladaptive ER at the transition to formal schooling (age 5). Chronic elevations in maternal trauma-related distress contributed directly and indirectly to child maladaptive ER at age 5, and maternal nonsupportive responses emerged as a potential pathway driving the intergenerational transmission of emotion dysregulation. In contrast, paternal trauma-related distress neither undermined ERSBs nor contributed to child maladaptive ER. Instead, chronic elevations in paternal trauma-related distress predicted more supportive responses to children’s negative emotions. Results highlight the utility of repeated screening for trauma-related distress and prevention and early intervention efforts targeting parental trauma-related distress and nonsupportive responses to children’s negative emotions. These strategies may help promote adaptive ER at school entry and reduce risk for later psychopathology.
This article offers new insights on Africa-China relations and discourses of authenticity and intellectual property by examining the trade and consumption of Chinese-made fashion goods in Mozambique from an ethics perspective. Ethnographic fieldwork in southern Mozambique between 2017 and 2024 shows that many traders and consumers see Chinese counterfeits as beneficial and desirable, enabling them to participate in fashion systems from which they have long been excluded. For traders and consumers in Mozambique, it is ethically right to supply and purchase functional, adequate-quality, and aesthetically pleasing counterfeits. These goods are evaluated less in terms of legality than through pragmatic, everyday judgments about quality, care, and access. The Mozambican case complicates dominant narratives of Chinese-African trade and global intellectual property governance, showing how ethics of access and quality shape everyday globalization.
We investigate the effect of inertial particles on Rayleigh-Bénard convection using weakly nonlinear stability analysis. An Euler–Euler/two-fluid formulation is used to describe the flow instabilities in particle-laden Rayleigh–Bénard convection. The weakly nonlinear results are presented near the critical point (bifurcation point) for water droplets in the dry air system. We show that supercritical bifurcation is the only type of bifurcation beyond the critical point in particle-laden Rayleigh–Bénard convection. Interaction of settling particles with the flow and the Reynolds stress or distortion terms emerges due to the nonlinear self-interaction of fundamental modes breaking down the top–bottom symmetry of the secondary flow structures. In addition to the distortion functions, the nonlinear interaction of fundamental modes generates higher harmonics, leading to the tendency of preferential concentration of uniformly distributed particles, which is completely absent in the linear stability analysis. Further, we show that in the presence of thermal energy coupling between the fluid and particles, the difference between the horizontally averaged heat flux at the hot and cold surfaces is equal to the net sensible heat flux advected by the particles. The difference between the heat fluxes at hot and cold surfaces increases with an increase in particle concentration.
We introduce a framework for Riemannian diffeology. To this end, we use the tangent functor in the sense of Blohmann and one of the options of a metric on a diffeological space in the sense of Iglesias-Zemmour. As a consequence, the category consisting of weak Riemannian diffeological spaces and isometries is established. With a technical condition for a definite weak Riemannian metric, we show that the pseudodistance induced by the metric is indeed a distance. As examples of weak Riemannian diffeological spaces, an adjunction space of manifolds, a space of smooth maps and the mixed one are considered.
The position paper ‘The development of services for treatment of personality disorder in Adult Mental Health Services’ was published by the College of Psychiatrists of Ireland Personality Disorder Special Interest Group (PDSIG) in 2021. Following this, we are advocating for the development of a national treatment strategy for personality disorders in Ireland. As part of this process, we have examined international evidence and best practice guidelines for establishing personality disorder services. Key recommendations from the literature include access to services, continuity of care, a multidisciplinary approach, tiered models of care, collaboration with service users, staff training and supervision, and delivery of evidence-based interventions. These recommendations should form the backbone of a national personality disorder strategy for Ireland.
Kids SIPsmartER is a school-based behavioural intervention for rural Appalachia middle school students with an integrated two-way short message service (SMS) strategy for caregivers. When tested in a cluster randomized controlled trial, the intervention led to significant improvements in sugar-sweetened beverage (SSB) consumption among students and caregivers. This study explores changes in secondary caregiver outcomes, including changes in caregiver SSB-related theory of planned behaviour constructs (affective attitudes, instrumental attitudes, subjective norms, perceived behavioural control, and intentions), parenting practices, and the home environment. Participants included 220 caregivers (93% female, 88% White, 95% non-Hispanic, mean age 40.6) in Virginia and West Virginia at baseline and 7 months post-intervention. Relative to control caregivers (n = 102), intervention caregivers (n = 118) showed statistically significant improvements in instrumental attitudes (Coef.= 0.53, 95% CI [0.04, 1.01], p = 0.033), behavioural intentions (Coef.=0.46, 95% CI [0.05, 0.88], p = 0.027), parenting practices (Coef. = 0.22, 95% CI [0.11, 0.33], p < 0.001), and total home SSB availability (Coef. = –0.25, 95% CI [–0.39, –0.11], p < 0.001), with specific improvements for sweetened juice drinks (Coef. = –0.18, 95% CI [–0.35, –0.01], p = 0.043) and regular soda/soft drinks (Coef. = –0.31, 95% CI [–0.55, –0.07], p = 0.010). In contrast, there were no significant between group changes for affective attitudes, subjective norms, or perceived behavioural control. Our findings highlight future research areas and fill gaps in intervention literature. This study is among the few to develop and evaluate a scalable, theory-based caregiver SMS component in a rural, school-based intervention. Combined with evidence that Kids SIPsmartER improved SSB behaviours, our results emphasize the potential of theory-guided SMS interventions to impact SSB-related outcomes.
Crises of confidence in the relationship between academic research and broader society has led to an explosion in interest in community-led research methods, such as codesign, community-engaged research, and participatory action research. These methods are intended as a way of reconnecting scholarship and society during a period of intense polarization, but they remain far from mainstream. This reflection considers whether community organizing, and in particular the kind of approach initiated by Saul Alinsky that borrowed from a scholarly method at the University of Chicago in the 1920s and is now practiced in more than 99 cities around the world, can offer a practical guide for scholars keen to resolve this challenge. It outlines three elements of what is labeled the “relational method” that build on the philosophical and practical tools of community organizing: relationality, power, and uncertainty. It suggests that the principles and practices of the relational method can not only strengthen community-led research practice, but, if we take a lead from community organizing and recognize the importance of the relationship between the practice of social change and the institutions that seek to produce it, it can also help us to more clearly see how the diffusion of community-led research can align with the broader goal of creating more community-engaged universities.
We study the effect of democratization on stock market liquidity across Spanish political regimes between 1914 and 1936. We use press news related to mass mobilization in favor of political and redistributive reforms to build a monthly index of political uncertainty, and test its impact on different measures of stock liquidity based on daily data for the Madrid Stock Exchange. Our findings suggest that shifts in political uncertainty decreased trading and increased its price impact after the transition to democracy in 1931, but not in the socio-political mobilization that shook the monarchic regime during World War I and its aftermath. The results are robust to controls for other sources of political, economic and international uncertainty. Our evidence suggests that potential challenges to the socio-economic status quo became more credible after the regime change of 1931 and increased the perceived cost of democratization for wealthy elites. This generated a situation of radical uncertainty about future asset returns, leading to a persistent deterioration of investor participation and market liquidity. Contemporary financial chronicles support this interpretation.
The wake of a horizontal-axis wind turbine was studied at a Reynolds number of $Re_D=4\times 10^6$ with the aim of revealing the effects of the tip speed ratio, $\lambda$, on the wake. Tip speed ratios of $4\lt \lambda \lt 7$ were investigated and measurements were acquired up to 6.5 diameters downstream of the turbine. Through an investigation of the turbulent statistics, it is shown that the wake recovery was accelerated due to the higher turbulence levels associated with lower tip speed ratios. The energy spectra indicate that larger broadband turbulence levels at lower tip speed ratios contributes to a more rapidly recovering wake. Wake meandering and a coherent core structure were also studied, and it is shown that these flow features are tip speed ratio invariant, when considering their Strouhal numbers. This finding contradicts some previous studies regarding the core structure, indicating that the structure was formed by a bulk rotor geometric feature, rather than by the rotating blades. Finally, the core structure was shown to persist farther into the near wake with decreasing tip speed ratio. The structure’s lifetime is hypothesised to be related to its strength relative to the turbulence in the core, which decreases with increasing tip speed ratio.
Both armed groups and civilians have evoked historical memory in the Katiba Macina and Boko Haram related conflicts. Although not a cause of the conflicts, historical memory informs the perceptions and choices of both fighters and civilians. Based on interviews with members of the armed groups and local civilians, the authors demonstrate that how an individual perceives their own positionality within society and how they perceive their ancestors’ positionality affects how that person reacted to the armed groups’ evocation of historical memory, how they interpreted the source of greater threat, and their own self-protection strategies.
Jha et al. (2024) offer several objections to Lange’s account of “distinctively mathematical” scientific explanations (DMEs). This article argues that these objections fail. Jha et al.’s arguments fail to show that Lange is inconsistent in characterizing DMEs—that, by Lange’s lights, every causal explanation involving mathematical facts is a DME. Jha et al.’s arguments fail to suggest that on Lange’s account, DME’s are too common or explanatorily insubstantial to underwrite any philosophical lessons about explanation. Jha et al.’s arguments also fail to show that Lange relies on underhanded manipulations of the explananda targeted by DMEs.
Chronic pain research studies are important for both finding new treatments and improving existing treatments for individuals with chronic pain. For clinical trials to be effective, participants need to be engaged and willing to participate in treatment groups. Our research applies the theory of planned behavior (TPB) to understand how attitudes, perceived social norms, and perceived control over intervention engagement are associated with willingness to participate in interventions for chronic low back pain (CLBP).
Methods:
Adult Michigan Medicine patients were identified using electronic medical records and emailed a link to an online, cross-sectional survey. Participants who self-reported CLBP, ability to read and write in English, and consented to participate were able to complete the survey (N = 405).
Results:
The results showed more positive attitudes, positive social norms, and higher perceived behavioral control related to specific chronic low back pain interventions are associated with greater willingness to participate after controlling for demographic and pain-related characteristics.
Conclusion:
The findings suggest that TPB constructs may be useful in guiding recruitment efforts for chronic pain intervention trials.