As an effective drag reduction and thermal protection technology, the opposing jet can guarantee the flight safety of the hypersonic vehicle. In this paper, the jet mode transition is realised by controlling the total jet pressure ratio value (PR) with a function. The jet mode transition from the long penetration mode (LPM) to the short penetration mode (SPM) uses an increasing function. However, the jet mode transition from SPM to LPM uses a decreasing function. The flow field reconstruction process of a two-dimensional axisymmetric blunt body model in the hypersonic flow is studied when the jet mode transition between SPM and LPM changes into each other. The flow field structures and wall parameters of the LPM and SPM transition processes are obtained. The results indicate that the drag and Stanton number both decrease in the transition stage from LPM to SPM, and this is beneficial for the improvement of the drag reduction and thermal protection effect. The peak values of drag and Stanton number fall by 36.39% and 46.40%, respectively. When the jet mode transforms from SPM to LPM, the Stanton number increases, and the drag force first increases and then decreases. However, the final drag reduction effect is not obvious. With the increase in the change rate of the total pressure ratio of the two jet transformation modes, the jet mode transition time is advanced, and the flow field changes more violently.

Ryoji Ikeda’s sonic composition has often been considered to prioritise a physical, immersive experience of space over temporal musical progression. This article challenges this commonly held view, arguing that the static nature of his work should be understood in terms of complex interactions between space and time rather than in dualistic terms. By analysing a large-scale sonic transformation within his 2005 album Dataplex, the article uncovers complex rhizomatic networks of materials that expand across multiple tracks. The links between the album tracks leads to an unconventional quality of musical time that contains a high degree of statis yet nevertheless presents a non-linear progression, which is created through repetition (loops), variation and re-contextualisation of sounds. The analysis suggests that experiencing the ordered series of tracks in the album means accumulating information and exploring memory within a non-interchangeable process of sonic flow and metamorphosis. Despite the fragmentary nature of these internal continuities, the resulting rhizomatic networks provide a means to understand and even to listen structurally to Ikeda’s sonic composition.

In this contribution, we exploit machine learning techniques to evaluate whether and how close firms are to become successful exporters. First, we train various algorithms using financial information on both exporters and non-exporters in France in 2010–2018. Thus, we show that it is possible to predict the distance non-exporters are from export status. In particular, we find that a Bayesian Additive Regression Tree with Missingness In Attributes (BART-MIA) performs better than other techniques with an accuracy of up to 0.90. Predictions are robust to changes in definitions of exporters and in the presence of discontinuous exporting activity. Eventually, we discuss how our exporting scores can be helpful for trade promotion, trade credit, and assessing aggregate trade potential. For example, back-of-the-envelope estimates show that a representative firm with just below-average exporting scores needs up to 44% more cash resources and up to 2.5 times more capital to get to foreign markets.

Childhood is a critical period for muscle accumulation. Studies in elders have reported that antioxidant vitamins could improve muscle health. However, limited studies have assessed such associations in children. This study included 243 boys and 183 girls. A seventy-nine-item FFQ was used to investigate dietary nutrients intake. Plasma levels of retinol and α-tocopherol were measured using high-performance liquid chromatography with MS. Dual X-ray absorptiometry was used to assess appendicular skeletal muscle mass (ASM) and total body fat. The ASM index (ASMI) and ASMI Z-score were then calculated. Hand grip strength was measured using a Jamar® Plus+ Hand Dynamometer. Fully adjusted multiple linear regression models showed that for each unit increase in plasma retinol content, ASM, ASMI, left HGS and ASMI Z-score increased by 2·43 × 10−3 kg, 1·33 × 10−3 kg/m2, 3·72 × 10−3 kg and 2·45 × 10−3 in girls, respectively (P < 0·001–0·050). ANCOVA revealed a dose–response relationship between tertiles of plasma retinol level and muscle indicators (Ptrend: 0·001–0·007). The percentage differences between the top and bottom tertiles were 8·38 %, 6·26 %, 13·2 %, 12·1 % and 116 % for ASM, ASMI, left HGS, right HGS and ASMI Z-score in girls, respectively (Pdiff: 0·005–0·020). No such associations were observed in boys. Plasma α-tocopherol levels were not correlated with muscle indicators in either sex. In conclusion, high circulating retinol levels are positively associated with muscle mass and strength in school-age girls.

Perishable artifacts are invaluable tools for reconstructing past lifeways of hunter-gatherers, and when preserved in arid settings, they can inform on dynamic interactions between communities and the environment. Many such materials were recovered from early archaeological surveys in Utah and Nevada but were largely excluded from contemporary analyses because of small sample sizes, their fragmentary nature, and insecure proveniences. This synchronic reanalysis of cordage and coiled basketry from 10 late Holocene sites in the Great Salt Lake Desert utilizes newer approaches to perishables analysis so as to collect data more conducive to statistical comparisons of subsistence and craft traditions absent from earlier Great Basin studies. Regional trends of conformity of fine cordage contrasted with a diversity of basketry manufacture suggest contemporaneous social stressors directing the production of materials and two potentially gendered subclasses of utilitarian objects. Feminine and masculine perishable crafts in the Bonneville Basin follow separate manufacturing traditions, observable despite small sample sizes and poor dating of these curated collections.

This study identifies the link between women's asset ownership and women's empowerment. Women's empowerment is measured by their decision-making role related to their health, large household purchases, and their social interaction. Using Demographic and Health Surveys data for 18 countries from South Asia, the Middle East, and sub-Saharan Africa, we found that the women who owned assets were 14% more likely to be empowered compared with the women who did not own any asset (odds ratio: 1.14, 95% confidence interval: 1.10–1.185). At a disaggregated country level, asset ownership was positively and significantly associated with women's empowerment in nine countries, negatively associated in one country, and had no significant association in the other eight countries. This study provides important insights into the link between women's asset ownership and empowerment and may inform public policy related to gender equality through women's empowerment.

Difficulties with emotion regulation are integral to borderline personality disorder (BPD) and its hypothesized developmental pathway. Here, we prospectively assess trajectories of emotion processing across childhood, how BPD symptoms impact these trajectories, and whether developmental changes are transdiagnostic or specific to BPD, as major depressive (MDD) and conduct disorders (CD) are also characterized by emotion regulation difficulties. This study included 187 children enriched for those with early symptoms of depression and disruptive behaviors from a longitudinal study. We created multilevel models of multiple components of emotional processing from mean ages 9.05 to 18.55 years, and assessed the effect of late adolescent BPD, MDD, and CD symptoms on these trajectories. Linear trajectories of coping with sadness and anger, and quadratic trajectories of dysregulated expressions of sadness and anger were transdiagnostic, but also exhibited independent relationships with BPD symptoms. Only inhibition of sadness was related to BPD symptoms. The quadratic trajectories of poor emotional awareness and emotional reluctance were also independently related to BPD. Findings support examining separable components of emotion processing across development as potential precursors to BPD, underscoring the importance of understanding these trajectories as not only a marker of potential risk but also potential targets for prevention and intervention.

This article examines the problem of flooding in colonial Tonkin through two interrelated lenses: the history of disasters as social and political phenomena, and the history of technology and the constraints that shape its use. With a gradient ten times steeper than the Mekong, the Red River (Sông Cái in Vietnamese) is notorious for its huge seasonal fluctuations and violent floods. For centuries, local rulers and cultivators constructed dikes to protect fields and settlements, though breaches and inundations were frequent. French administrators were convinced that they could improve the flooding situation with modern know-how. From the 1890s, colonial engineers carefully studied the river's behavior, examined a range of different schemes to control it, and debated the extent to which the straitjacketing of the river might gradually exacerbate flood risk. Despite their deep-seated misgivings about the problems caused by dikes, they were ultimately forced to work within the parameters of pre-colonial hydraulic works. The result was an intensification of existing dependencies and flood vulnerabilities, which finally came to a head under the combined pressures of extreme weather and war, and which ultimately played an important role in undermining colonial authority in the Red River delta.

This study investigated, and discusses the integration of, the shift-and-persist (SAP) and skin-deep resilience (SDR) theories. The SAP theory states that the combination of shifting (adjusting oneself to stressful situations through strategies like emotion regulation) and persisting (enduring adversity with strength by finding meaning and maintaining optimism) will be beneficial to physical health in children experiencing adversity. The SDR theory states that high striving/self-control will be beneficial to mental health but detrimental to physical health among those confronting adversity. This study investigated 308 children ages 8–17 experiencing the adversity of a chronic illness (asthma). SAP and SDR (striving/self-control) were assessed via questionnaires, and physical health (asthma symptoms, inflammatory profiles), mental health (anxiety/depression, emotional functioning), and behavioral (medication adherence, activity limitations, collaborative relationships with providers) outcomes were measured cross-sectionally. SAP was associated with better physical health, whereas SDR was associated with worse physical health. Both were associated with better mental health. Only SDR was associated with better behavioral outcomes. Implications of findings and discussion of how to integrate these theories are provided. We suggest that future interventions might seek to cultivate both SAP and SDR to promote overall better health and well-being across multiple domains in children experiencing adversity.

This article analyzes the cultural transformation in the self-proclaimed “people’s republics” in the Donbas, characterized by a violent rejection of global postmodernist art and the return to a Soviet, often Stalinist, cultural message and visual language. The author, an art critic and curator, born and previously active in the Donbas, begins by discussing the destruction of unconventional art, even when created by the miners themselves, and the projects associated with the IZOLYATSIA art platform. The second part of the article deals with public art in the early years of the self-proclaimed Donetsk People’s Republic (DNR), in particular, political posters and art exhibits, which employ Soviet or Soviet-like themes and visual imagery. In a notable departure from the Russian model, the “mobilized art” in the separatist-controlled Donbas features positive references to the Bolshevik Revolution. Throughout the article, the concept of violence is used to analyze the mediatized destruction of nonrealist art and the construction of the DNR’s self-image.