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High rates of comorbidity are observed between internalizing and externalizing problems, yet the developmental dynamics of comorbid symptom presentations are not yet well understood. This study explored the developmental course of latent profiles of internalizing and externalizing symptoms across kindergarten, first grade, and second grade. The sample consisted of 336 children from an urban, low-income community, selected based on relatively high (61%) or low (39%) aggressive/oppositional behavior problems at school entry (64% male; 70% African American, 20% Hispanic). Teachers reported on children's symptoms in each year. An exploratory latent profile analysis of children's scores on aggression/oppositionality, hyperactivity/inattention, anxiety, and social withdrawal symptom factors revealed four latent symptom profiles: comorbid (48% of the sample in each year), internalizing (19%–23%), externalizing (21%–22%), and well-adjusted (7%–11%). The developmental course of these symptom profiles was examined using a latent transition analysis, which revealed remarkably high continuity in the comorbid symptom profile (89% from one year to the next) and moderately high continuity in both the internalizing and externalizing profiles (80% and 71%, respectively). Internalizing children had a 20% probability of remitting to the well-adjusted profile by the following year, whereas externalizing children had a 25% probability of transitioning to the comorbid profile. These results are consistent with the hypothesis that a common vulnerability factor contributes to developmentally stable internalizing–externalizing comorbidity, while also suggesting that some children with externalizing symptoms are at risk for subsequently accumulating internalizing symptoms.

Black/African-American girls are infected with sexually transmitted infections (STIs) at higher rates than their White counterparts. This study tested the efficacy of IMARA, a mother-daughter psychosocial STI/HIV prevention program, on adolescent Black/African-American girls' incident STIs at 12 months in a 2-arm group randomized controlled trial. Black/African-American girls 14-18 years old and their primary female caregiver were eligible for the study. Girls provided urine samples to test for N. gonorrhoeae, C. trachomatis, and T. vaginalis infection at baseline and 12-months. Mother-daughter dyads were randomly assigned to IMARA (n = 118) or a time-matched health promotion control program (n = 81). Retention at 12-months was 86% with no difference across arms. Both interventions were delivered over two consecutive Saturdays totaling 12 hours. Girls who received IMARA were 43% less likely to contract a new STI in the 12-month post-intervention period compared with those in the health promotion control program (p = .011). A secondary follow-up intent-to-treat analysis provided additional support for the protective effect of IMARA, albeit with a similar magnitude of 37% (p = .014). Findings provide early evidence for IMARA's efficacy, such that IMARA protected against STIs at 12-months among adolescent Black/African-American girls. Future research should examine the mechanisms associated with reduced STIs.

Sexual minority men of color report intimate partner violence (IPV) and substance use at elevated rates compared to heterosexual peers, but little is known about how types (physical/sexual, controlling, monitoring, emotional) of perpetration and victimization are connected to types of substance use. Associations between past-6-month IPV experiences and substance use (tobacco, alcohol, cannabis, poppers, cocaine) were examined among sexual minority men (N = 414; 18–27 years). IPV victimization and perpetration were reported by 22% and 14% of the sample. Any victimization and controlling victimization were positively correlated with tobacco use, physical victimization was positively correlated with cocaine and poppers use, and monitoring victimization was negatively correlated with cannabis and poppers use. Any perpetration was positively correlated with tobacco use and binge drinking, and emotional perpetration was positively correlated with binge drinking. Understanding and addressing IPV victimization and perpetration experiences are critical for understanding risk conferred by IPV in this population.

The interactions between electrons and lattice vibrations are fundamental to materials behaviour. In the case of group IV–VI, V and related materials, these interactions are strong, and the materials exist near electronic and structural phase transitions. The prototypical example is PbTe whose incipient ferroelectric behaviour has been recently associated with large phonon anharmonicity and thermoelectricity. Here we show that it is primarily electron-phonon coupling involving electron states near the band edges that leads to the ferroelectric instability in PbTe. Using a combination of nonequilibrium lattice dynamics measurements and first principles calculations, we find that photoexcitation reduces the Peierls-like electronic instability and reinforces the paraelectric state. This weakens the long-range forces along the cubic direction tied to resonant bonding and low lattice thermal conductivity. Our results demonstrate how free-electron-laser-based ultrafast X-ray scattering can be utilized to shed light on the microscopic mechanisms that determine materials properties. Group IV–VI materials often exist in a state near an electronic or structural phase transition. Here, the authors use ultrafast X-ray scattering to show that coupling of band-edge electrons and phonons causes the ferroelectric instability observed in lead telluride.

Abstract Objectives To introduce the Registry of Senior Australians (ROSA) Outcome Monitoring System, which can monitor the quality and safety of care provided to individuals accessing residential aged care. Development and examination of 12 quality and safety indicators of care and their 2016 prevalence estimates are presented. Design Retrospective. Setting 2690 national and 254 South Australian (SA) aged care facilities. Participants 208 355 unique residents nationally and 18 956 in SA. Main Outcome Measures Risk-adjusted prevalence of high sedative load, antipsychotic use, chronic opioid use, antibiotic use, premature mortality, falls, fractures, medication-related adverse events, weight loss/malnutrition, delirium and/or dementia hospitalisations, emergency department presentations, and pressure injuries. Results Five indicators were estimated nationally; antibiotic use (67.5%, 95% confidence interval (CI): 67.3–67.7%) had the highest prevalence, followed by high sedative load (48.1%, 95% CI: 47.9–48.3%), chronic opioid use (26.8%, 95% CI: 26.6–26.9%), antipsychotic use (23.5%, 95% CI: 23.4–23.7%) and premature mortality (0.6%, 95% CI: 0.6–0.7%). Seven indicators were estimated in SA; emergency department presentations (19.1%, 95% CI: 18.3–20.0%) had the highest prevalence, followed by falls (10.1%, 95% CI: 9.7–10.4%), fractures (4.8%, 95% CI: 4.6–5.1%), pressure injuries (2.9%, 95% CI: 2.7–3.1%), delirium and/or dementia related hospitalisations (2.3%, 95% CI: 2.1–2.6%), weight loss/malnutrition (0.7%, 95% CI: 0.6–0.8%) and medication-related events (0.6%, 95% CI: 0.5–0.7%). Conclusions Twelve quality and safety indicators were developed to monitor aged care provided to older Australians based on the synthesis of existing literature and expert advisory input. These indicators rely on existing data within the aged care and healthcare sectors, therefore creating a pragmatic tool to examine quality and unwarranted care variation.

Chimpanzee insectivory is seasonally variable, with pronounced peaks or set seasonal periods of consumption observed in most chimpanzee communities. This variation is interesting given that chimpanzees invest considerable effort into complex tool‐using behaviors to acquire insect prey. Evidence suggests this seasonal variation is related to insect behavior, but few studies have been done to empirically examine this relationship. In this study, we assessed whether a seasonal pattern of termite fishing by Nigeria‐Cameroon chimpanzees (Pan troglodytes ellioti) in Mbam & Djerem National Park, Cameroon was driven by termite behavior. We measured termite presence and termite foraging activity monthly at seven termite mounds near Ganga Research Station from April 2022 to April 2023. Macroscopic fecal analysis and camera traps placed at each mound demonstrated termite fishing in this community occurred from March to June, with a rare smaller period of termite fishing in October 2021. Average monthly rainfall, average monthly temperature, and average monthly fruit availability were used to examine potential environmental factors that could impact termite fishing seasonality. Termite presence was significantly different between months with and without chimpanzee termite fishing (t‐test, −6.569, p < .001). Termite presence was also significantly associated with average monthly rainfall (ANOVA, F = 13.9, p = .002, R2 = .775). Termites in this region appear to respond to the transition from dry to wet seasons by moving closer to the soil surface. This corresponds with greater chimpanzee termite fishing, suggesting that termite accessibility may be driving seasonal variation in this behavior. Using an interdisciplinary approach involving remote camera trap monitoring, termite behavioral surveys, and ecological surveys, we identified key ecological factors related to a pronounced seasonal period of termite fishing in a community of the understudied Nigeria‐Cameroon chimpanzee in central Cameroon. Our results suggest the highly seasonal nature of chimpanzee termite fishing in this region is driven by seasonal variation in termite behavior mediated by rain, which makes termites more accessible to chimpanzees during periods of intermediate rainfall.

The neotenic Platerodrilus net-winged beetles have strongly modified development where females do not pupate and retain larval morphology when sexually mature. As a result, dispersal propensity of females is extremely low and the lineage can be used for reconstruction of ancient dispersal and vicariance patterns and identification of centres of diversity. We identified three deep lineages in Platerodrilus occurring predominantly in (1) Borneo and the Philippines, (2) continental Asia, and (3) Sumatra, the Malay Peninsula and Java. We document limited ranges of all species of Platerodrilus and complete species level turnover between the Sunda Islands and even between individual mountain regions in Sumatra. Few dispersal events were recovered among the major geographical regions despite long evolutionary history of occurrence; all of them were dated at the early phase of Platerodrilus diversification up to the end of Miocene and no exchange of island faunas was identified during the Pliocene and Pleistocene despite the frequently exposed Sunda Shelf as sea levels fluctuated with each glacial cycle. We observed high diversity in the regions with persisting humid tropical forests during cool periods. The origins of multiple species were inferred in Sumatra soon after the island emerged and the mountain range uplifted 15 million years ago with the speciation rate lower since then. We suppose that the extremely low dispersal propensity makes Platerodrilus a valuable indicator of uninterrupted persistence of rainforests over a long time span. Additionally, if the diversity of these neotenic lineages is to be protected, a high dense system of protected areas would be necessary.

Background While there is growing research considering the experiences of transgender youth whose identities align with the gender binary, especially among young trans women, there are significantly fewer studies that accurately capture data about nonbinary youth, and even fewer studies capturing the experiences of transgender and gender diverse (TGD) youth of color. The purpose of this research was to assess the prevalence of sexual health behaviors, mental health challenges, substance use, and healthcare utilization among Black/African American, Latinx, Asian/Pacific Islander, indigenous and multi-racial/ethnic TGD youth, who have been largely underrepresented in research. Methods A total of 108 TGD youth ages 16–24 were recruited into the Tr ans Yo uth of Color Study (TRUTH). Each participant completed a 90-min survey administered by a research assistant with more sensitive information collected using ACASI. In addition to a completing a survey administered by research staff, participants also participated in specimen collection, which included urine sampling to assess recent substance use without a prescription, self-collected rectal/frontal and throat swabs to test for gonorrhea and chlamydia, and a blood draw to test for recent use of drugs, gonorrhea and chlamydia, and syphilis. The sample was recruited at public venues, community outreach and referral, through social media outreach, and via participant referral. Cross-sectional analyses were from a single study visit. Results Compared to rates among their cisgender peers, participants reported experiencing adverse social and structural determinants of health—e.g. food insecurity (61%), housing instability (30%), and limited access to healthcare (26% had no place to go for healthcare)—and elevated rates of illicit drug use (19–85%), mental health problems (e.g. 60% self-reported depression), and involvement in sexual risk-related behaviors (e.g. among those reporting penetrative sex 57–67% reported sex without a condom). Conclusions This study adds descriptions of both mental and sexual health outcomes of a non-clinical sample of TGD youth to the literature, particularly among young transgender men and gender nonbinary youth, who have frequently been excluded from previous studies of sexual health. The findings document experiences and behaviors among TGD youth that contribute to mental and sexual health concerns, including rates of substance use, and healthcare utilization.

A work on turbulent premixed combustion is timely because of increased concern about the environmental impact of combustion and the search for new combustion concepts and technologies. An improved understanding of lean fuel turbulent premixed flames must play a central role in the fundamental science of these new concepts. Lean premixed flames have the potential to offer ultra-low emission levels, but they are notoriously susceptible to combustion oscillations. Thus, sophisticated control measures are inevitably required. The editors' intent is to set out the modeling aspects in the field of turbulent premixed combustion. Good progress has been made recently on this topic. Thus, it is timely to edit a cohesive volume containing contributions from international experts on various subtopics of the lean premixed flame problem.