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The effect of the initial condition upon the transport dynamics of miscible flowing fluids in a porous medium is investigated under viscosity and density contrasts. Such flows have attracted significant attention due to their importance in many fields of science and engineering, such as $\mathrm {CO}_2$ sequestration and aquifer remediation. Using high-resolution two-dimensional numerical simulations, we illustrate the impact of viscosity and density contrasts on the temporal evolution of the spreading and mixing quantities. We show that such impact depends on the initial shape of the source distribution where the solute is injected and on the intensity of the horizontal background flux. We find that rates of mixing are dependent on whether the solute is more or less viscous than the ambient fluid, a result usually not taken into consideration in studies on gravity fingering. At higher background flux, the effects due to horizontal viscous fingering dominate over gravitational fingering. Our computational analysis also suggests a non-trivial relationship between mixing and the length of the plume's interface under fingering instabilities. Finally, we show how a stratified permeability field can interact with these sources of instabilities and affect the transport behaviour of the plume.
The Russian invasion of Ukraine in 2022 has affected more people and destroyed a local public health facility. When some territories in Ukraine were de-occupied, national and international mobile clinics (MCs) were involved for medical assistance to local inhabitants. Knowledge about population health, medical, and humanitarian needs after they have been de-occupied has to improve planning for health system response.
Objective:
The aim of this study was to summarized the MC experience at the first month after the area was de-occupied, as well as to show out-patient visits and to identify a need for medicines and medical equipment in the MC.
Methods:
The information related to the missions was obtained by direct observation and estimation on empirical data gathering in the field during a twelve-day mission in April-May 2022. All patients were divided by age, sex, and diseases according to the International Classification of Diseases-10 (ICD-10). During the twelve-day MC mission, medical assistance was provided for 478 out-patients. Descriptive statistical methods were undertaken using Microsoft Office 2019, Excel with data analysis.
Interventions:
All out-patients were evaluated clinically. Personal medical cards were completed for each patient. Glucose testing as well as tests for coronavirus disease 2019/COVID-19 had been done, if it was necessary. All sick persons were treated for their disease.
Results:
The priority needs for emergency and primary medical care, medicines, and hygienic and sanitation supplies after the area was de-occupied were fixed. The most frequent reasons for visiting the МС were: hypertension (27.6%), musculoskeletal-related (arthritis) diseases (26.9%), heart and peripheral vascular diseases (12.1%), upper gastrointestinal disorder (5.4%), upper respiratory infection (5.0%), and diabetes Type-2 (3.7%). Other diagnoses such as lower respiratory tract infection, diagnoses of the digestive system (hemorrhoids and perianal venous thrombosis), chronic obstructive pulmonary disease/COPD or asthma, eye diseases, gynecology-related condition, menstrual condition, and urinary tract disorder were distributed almost equally (0.21%-2.51%) among the patient population.
Conclusions:
In the de-occupied territories, a health responder could be ready for medical assistance to patients with noncommunicable diseases (NCDs) as well as to support a person with psychological reactions who asked for sedatives and sleep-inducing medicines. These data clearly demonstrate that MCs must be equipped by blood pressure (BP) monitor, stethoscope, pulse oximeter, and diabetes testing kit glucose with essential medicines. This study improves health response planning for local civilian populations in de-occupied territory.
Transition of care refers to the continuity of health care during the movement from one healthcare setting to another as care needs change during a chronic illness. We sought to describe social, demographic, and clinical factors related to successful transition in a tertiary urban care facility in patients with CHD. Patients were identified utilising the electronic medical record. Inclusion criteria were patients with CHDs aged ≥15 years seen in the paediatric cardiology clinic between 2013 and 2014. Deceased patients were excluded. Clinical and demographic variables were collected. Patient charts were reviewed in 2015–2021 to determine if included patients were a) still in paediatric cardiology care, b) transitioned to adult cardiology/adult CHD, or were c) lost to follow-up. A total of 322 patients, 53% male (N:172), 46% female (N:149) were included. Majority had moderately complex lesions (N:132, 41%). Most patients had public insurance (N:172, 53%), followed by private insurance (N:67, 21%), while 15% of patients (N:47) were uninsured. Only 49% (N = 159) had successful transition, while 22% (N = 70) continued in care with paediatric cardiology, and 29% (N = 93) were lost to follow-up. Severity of CHD (p = 0.0002), having healthcare insurance (p < .0001), presence of a defibrillator (p = 0.0028), and frequency of paediatric cardiology visits (p = 0.0005) were significantly associated with successful transition. Most patients lost to follow-up (N:42,62%) were either uninsured or had public insurance. Lack of successful transition is multifactorial, and further efforts are needed to improve the process in patients with CHD.
Grill (2023) defends the sum of averages view (SAV), on which the value of a population is found by summing the average welfare of each generation or birth cohort. A major advantage of SAV, according to Grill, is that it escapes the Egyptology objection to average utilitarianism. But, we argue, SAV escapes only the most literal understanding of this objection, since it still allows the value of adding a life to depend on facts about other, intuitively irrelevant lives. Moreover, SAV has a decisive drawback not shared with either average or total utilitarianism: it can evaluate an outcome in which every individual is worse off as better overall, even when exactly the same people exist in both outcomes. These problems, we argue, afflict not only Grill's view but any view that uses a sum of subpopulation averages, apart from the limiting cases of average and total utilitarianism.
Russia’s Arctic policy since 2008 has been influenced by two competing foreign policy lines (discourses): the “Arctic as a resource base” and the “sovereignty discourse”. The “Arctic as a resource base” has been the dominant one since the first Russian Arctic Strategy in 2008. It is primarily about exploiting the vast oil and gas resources estimated to be located there, as well as turn the Northern Sea Route into a “global transport corridor”. In Russia’s Arctic Strategy of 2020, however, there is enhanced emphasis on sovereignty and power balancing in Russian Arctic policy. And the focus on sovereignty was heightened with the amendments to Russia’s Arctic Strategy in March 2023. This increased emphasis on sovereignty, territorial defence and balance of power in Russian Arctic policy is likely to be further reinforced by the growing great-power competition between the USA and Russia, which has gained new momentum following Russia’s invasion of Ukraine in 2022.
The aim of the present study was to conduct a preliminary study of the Stanford Gender-Related Variables for Health Research (GVHR) adapted to the Spanish population, testing its factor structure, sex factorial invariance and relationship with health variables. Participants were 438 adults between 19–73 years old (M = 31.90, SD = 12.12) who completed the GVHR and measures of health-related quality of life, psychological health, and health-risk behaviors. The confirmatory factorial analysis of the GVHR indicated an acceptable fit to the 7-factor structure as proposed for the North American population. Emotional intelligence and independence factors had low internal consistency, therefore, a five-factor model was tenable in the Spanish population. Sex scalar invariance was tenable, indicating that the factors latent means can be meaningfully compared across sex. Univariate logistic regressions indicated that women reported worse mental and physical health and more health limitations, but this effect dissipated when gender variables were considered. Caregiver and work strain stood out as the variables related to gender that predicted worse health-related quality of life, psychological health, and health-risk behaviors. In conclusion, factorial structure of the GVHR may differ from one culture to another. Additionally, the variables related to gender in the GVHR give a better account of the differences in health compared to biological sex.
We build upon Brace, Langer, and Hall’s (2000, The Journal of Politics 62: 387–413) original measure of American state supreme court justice ideology – the PAJID scores. To do so, we gather new data on 1,666 state supreme court justices who served between 1970 and 2019 and update the PAJID scores throughout this period. Testing indicates that PAJID scores are a valid measure of state supreme court justices’ policy preferences and compare favorably, though less efficiently, to others such as Bonica and Woodruff (2015, The Journal of Law, Economics, and Organization 31: 472–98) and Windett, Harden, and Hall (2015, Political Analysis 23: 461–9). Given limited data availability for other ideological measures pre-1990 and post-2010, we conclude that these updated PAJID scores should prove attractive to scholars studying state courts during these periods and among those who desire additional state supreme court ideological data for robustness checks.
The article presents results of measurements of radiocarbon (14C) concentration in sub-annual dendrochronologically dated tree rings of English oak (Quercus robur L.) from Grabie village near Kraków (southern Poland). Samples of early wood (EW) and late wood (LW) spanning the years 664–658 BCE. α-cellulose was extracted from each sample and their radiocarbon content was measured at the ATOMKI laboratory in Debrecen, Hungary. The EW and LW data confirm a prolonged increase in Δ14C values around 665–663 as was observed by Park et al. (2017), Rakowski et al. (2019), or Sakurai et al. (2020). In addition, we found that this event may consist of two relatively small events, as was proposed by Sakurai et al. (2020). Based on obtained in this and previous study data we estimate that the occurrence of the two events were between 665 and 664 BCE (Rakowski et al. 2019), and in late spring of 663 BCE (May–June, before beginning of LW formation).
Why do some, but not all oil-rich states provide generous welfare to their populations? Building on a case study of Oman in the 1960s and 1970s, we argue that anti-systemic subversive threats motivate ruling elites in oil states to use welfare as a tool of mass co-optation. We use the generalized synthetic control method and difference-in-difference regressions for a global quantitative test of our argument, assessing the effect of different types of subversion on a range of long-term welfare outcomes in oil-rich and oil-poor states. We demonstrate that the positive effect of subversion appears limited to center-seeking subversive threats in oil-rich countries. The paper addresses a key puzzle in the literature on resource-rich states, which makes contradictory predictions about the impact of resource rents on welfare provision.
Although offspring of women exposed to childhood trauma exhibit elevated rates of psychopathology, many children demonstrate resilience to these intergenerational impacts. Among the variety of factors that likely contribute to resilience, epigenetic processes have been suggested to play an important role. The current study used a prospective design to test the novel hypothesis that offspring epigenetic aging – a measure of methylation differences that are associated with infant health outcomes – moderates the relationship between maternal exposure to childhood adversity and offspring symptomatology. Maternal childhood adversity was self-reported during pregnancy via the ACEs survey and the CTQ, which assessed total childhood trauma as well as maltreatment subtypes (i.e., emotional, physical, and sexual abuse). Offspring blood samples were collected at or shortly after birth and assayed on a DNA methylation microarray, and offspring symptomatology was assessed with the CBCL/1.5–5 when offspring were 2–4 years old. Results indicated that maternal childhood trauma, particularly sexual abuse, was predictive of offspring symptoms (ps = 0.003–0.03). However, the associations between maternal sexual abuse and offspring symptomatology were significantly attenuated in offspring with accelerated epigenetic aging. These findings further our understanding of how epigenetic processes may contribute to and attenuate the intergenerational link between stress and psychopathology.
The matrilineal Yaawo of northern Mozambique are recognized as having had a tradition of female figures of spiritual and political authority, though little is known of their history. This article takes “voice” as its analytical focus to explore how these women feature in the historical memories of the region. Methodologically, it brings together the study of oral traditions and oral history. Focusing on the narratives as “collections of diverse voices” (Barber 1989), I analyze how past voices echo in the narratives and intertwine with the voices of their contemporary narrators and how contemporary narrators engage with the remembered voices of the past. As this article argues, examining the ways that the relationship between the deeper past and the present is performed in oral history can bring us a better understanding of women’s gendered leadership in a more distant past, as well as its changing shape in more recent times.
For any subset $Z \subseteq {\mathbb {Q}}$, consider the set $S_Z$ of subfields $L\subseteq {\overline {\mathbb {Q}}}$ which contain a co-infinite subset $C \subseteq L$ that is universally definable in L such that $C \cap {\mathbb {Q}}=Z$. Placing a natural topology on the set ${\operatorname {Sub}({\overline {\mathbb {Q}}})}$ of subfields of ${\overline {\mathbb {Q}}}$, we show that if Z is not thin in ${\mathbb {Q}}$, then $S_Z$ is meager in ${\operatorname {Sub}({\overline {\mathbb {Q}}})}$. Here, thin and meager both mean “small”, in terms of arithmetic geometry and topology, respectively. For example, this implies that only a meager set of fields L have the property that the ring of algebraic integers $\mathcal {O}_L$ is universally definable in L. The main tools are Hilbert’s Irreducibility Theorem and a new normal form theorem for existential definitions. The normal form theorem, which may be of independent interest, says roughly that every $\exists $-definable subset of an algebraic extension of ${\mathbb Q}$ is a finite union of single points and projections of hypersurfaces defined by absolutely irreducible polynomials.
An analytic theory has been developed for the scattering of electromagnetic plane wave from a perfect electromagnetic conducting (PEMC) cylindrical object coated with a general bi-isotropic (BI) material. The proposed problem has been solved using cylindrical vector wave function expansion approach along with the application of tangential boundary conditions. Analytic expressions of the scattering coefficients have been derived in their simplest forms. It is seen that by proper selection of admittance of PEMC core, electromagnetic parameters of BI coating, and coating thickness, one can optimize the scattering characteristics for specific applications. It is shown that the specific types of BI and strong chiral-coated PEMC cylinders having certain coating thicknesses can be used to significantly enhance the co-polarized forward scattering while keeping the cross-polarized forward scattering very small. Such types of enhanced co-polarized forward scattering are preferred in point-to-point communication. Some interesting features have been discussed where co-polarized and cross-polarized backscattering may be suppressed, which find applications in radar engineering problems and stealth technology.
Unequal patterns of cultural exchange between the Global South and Global North are sometimes labeled “neo-colonial.” What, if anything, is wrong with these patterns? Debates surrounding cultural globalization have traditionally divided proponents of free trade and cultural preservation. The article develops an alternative account grounded in a global application of the ideal of social equality. Citizens of privileged societies ought to regard and relate to citizens of disadvantaged societies as social equals. Patterns of cultural exchange play an important role in promoting these relationships. Historically, colonized peoples were often regarded as inferior based on perceived failures to produce cultural achievements. To the extent that unequal global cultural production and exchange persist, the colonial pattern remains. The duty to relate to foreigners as equals implies that Global North countries should stop pressing for cultural trade concessions and instead favor the import of cultural goods from the Global South.
The roles of family care partners of older persons living in long-term care homes (LTCH) were severely disrupted during the coronavirus disease (COVID-19) pandemic. Our aim was to describe their experiences and to solicit their recommendations for supportive actions. We conducted a critical ethnography with 24 care partners who cared or had cared for an older person living in an LTCH in Québec during the COVID-19 pandemic. We collected data during interviews and used Spradley’s method to analyse them. Care partners experienced a forced separation from the older persons they cared for, which resulted in significant distress. Care, including post-mortem care, was considered inadequate and sometimes even inhumane. Communication was inconsistent, and this variability was also noted in visitation rules. Care partners perceived LTCHs as a neglected community. Supportive actions were recommended. The results illustrated the essential contribution of care partners, and the supportive actions they recommended must be a catalyst for change toward more humane care in LTCH settings.
The lack of excellent wheat germplasm resources on the Qinghai-Tibet Plateau has led to a gradual decrease in genetic diversity and an increasingly narrow genetic background in wheat grown in this region. Rational use of excellent genes from wheat relatives is important to increase genetic diversity, broaden the genetic base and achieve high yield and quality in common wheat. The objective of this study was to use principal component and cluster analyses of 13 important agronomic traits of 44 Polish wheat varieties over 3 years and comprehensively evaluate them to screen for excellent germplasm resources, thus providing the basic material for broadening the genetic base of Qinghai-Tibet Plateau wheat germplasm resources.
The main objective of this study was to analyze the differences between older adults’ symptom profiles (subclinical, anxiety, depressive, and comorbid) in negative aging self-stereotypes, loneliness, and feelings of guilt associated with self-perception as a burden. Participants were 310 community-dwelling people aged 60 years and over. The sample was grouped into four symptom profiles of older adults: anxiety, depressive, comorbid anxiety-depression, and subclinical symptoms. We carried out multinomial logistic regression analyses to analyze the role of assessed variables in the explanation of the four symptom profiles. Older adults who reported a comorbid symptomatology presented higher negative aging self-stereotypes and feelings of loneliness than the other three profiles. Compared with the subclinical profile, older adults who reported clinical symptomatology (anxiety, depressive, and comorbid profile) presented higher feelings of guilt associated with self-perception as a burden. The findings of this study suggest potential associations that may contribute to understanding and treating comorbid anxiety and depressive symptoms in older adults.
An increased number of rogue waves, relative to standard distributions, can be induced by unidirectional waves passing over abrupt decreases in water depth. We investigate this phenomenon in a more general setting of multidirectional waves. We examine the influence of the directionality on the occurrence probability of rogue waves using laboratory experiments and fully nonlinear potential flow simulations. Based on the analysis of the statistics of random waves, we find that directional spreading reduces the formation probability of rogue waves relative to unidirectional seas. Nevertheless, for typical values of directional spreading in the ocean ($15^{\circ }\unicode{x2013}30^{\circ }$), our numerical results suggest that there is still a significant enhancement to the number of rogue waves just beyond the top of a depth discontinuity.
The present experimental study investigated the dynamics of single- and multi-port gaseous jet diffusion flames exposed to acoustic excitation via a standing wave situated in a closed waveguide at atmospheric pressure. High-speed imaging of the oscillatory flame was analysed via proper orthogonal decomposition (POD), revealing distinct signatures in both mode shapes and phase portraits for transitions in the acoustically coupled combustion process. For Reynolds numbers between 20 and 100, and for low to moderate forcing amplitudes, the flame exhibited sustained oscillatory combustion (SOC) that was highly coupled to the acoustic forcing. Frequency analysis of the temporal POD modes accurately recovered the forcing frequency and its higher harmonics. At higher forcing amplitudes, a multi-frequency response was observed, resulting from a combination of the forcing frequency and much lower frequency oscillations due to periodic lift-off and reattachment (PLOR) of the flame, preceding a transition to flame blow-off (BO). For both single- and triple-jet flames, transitions from SOC to PLOR to BO were characterized by significant alterations in primary modal energetic content, deflection and eventual smearing in phase portraits, and the development of additional frequencies in modal spectra, although transitional behaviour for the triple jet flames involved additional complexity in the dynamics due to its structure. These features provide the potential for the development of reduced-order models that can characterize and predict acoustically coupled combustion behaviour.