Background/Objectives: Previous studies have linked chronic conditions and multimorbidity to lower physical activity, but evidence across individual movement behaviours remains limited. We examined associations between the number of self-reported chronic diseases and conditions and transport-related walking, leisure time physical activity, muscle-strengthening activity and sedentary behaviour among people aged ≥15 years in Serbia. Methods: Nationally representative 2019 Serbian National Health Survey data were analysed (n = 13,076 with complete information on 17 conditions). Complex sample logistic regression models were sequentially adjusted for sociodemographic characteristics, body mass index, functional mobility and self-rated health. Additional analyses assessed linear trends and departures from linearity using all covariates except self-rated health. Results: Overall, 51.4% reported no condition, 18.0% one and 30.6% two or more. All outcomes were associated with condition status before adjustment, but most associations were attenuated after including functional mobility. After full adjustment, an overall association remained only for muscle-strengthening activity on <2 days/week (Wald F = 5.13; p = 0.006). Compared with no condition, one condition was associated with higher odds (aOR 1.60, 95% CI 1.18–2.16), but two or more were not. Each additional condition was associated with 4.5% higher odds of sitting or reclining for ≥6 h/day (aOR 1.045, 95% CI 1.006–1.087; p = 0.025). No other linear trends were identified; muscle-strengthening activity showed a departure from linearity (p < 0.001). Conclusions: Associations differed across movement behaviour domains and were attenuated particularly after including functional mobility. The number of conditions alone only partially accounted for observed differences in movement behaviours.

BACKGROUND Understanding the size, gender composition, and cadre mix of the health workforce and how it has evolved across time and locations can inform policies for planning, recruitment, training, and retention of human resources for health (HRH), and improvement of access to the health-care workforce among populations. Using comparable and standardised data sources, we aim to describe the composition and density of health workers by sex among 20 cadres for 204 countries and territories over 1990-2023 and quantify workforce shortfalls relative to universal health coverage (UHC) attainment. METHODS We used 1816 country-years of data from population-based surveys, 82 from censuses, 3888 from administrative sources, and 96 from scientific literature. We harmonised reported occupation in all sources with the International Standard Classification of Occupations 2008. We produced estimates for 20 cadres and the total health workforce disaggregated by sex using spatiotemporal Gaussian process regression, a standardised method in the Global Burden of Diseases, Injuries, and Risk Factors study. Finally, stochastic frontier meta-regression was used to estimate the minimum density of doctors, nurses and midwives, dentists, and pharmacists required to reach a score of 80 out of 100 on the UHC effective coverage index. FINDINGS In 2023, there were 122·1 million (95% uncertainty interval 115·4-130·5) health workers across 20 cadres, an increase of 81·2 million (72·0-90·5) or 198·5% (161·9-245·6) relative to 1990. Of that total, there were 15·1 million (13·1-18·2) doctors, 33·2 million (30·8-36·3) nurses, 2·4 million (2·0-2·9) midwives, and 7·6 million (6·7-8·6) community health workers (CHWs). 68·9% (66·9-70·6) of all health workers in 2023 were female, and female health workers accounted for 71·4% (64·5-77·4) of net HRH workforce growth. Less than half of doctors were female (43·9%, 34·5-53·2) and most nurses (80·7%, 76·2-83·1), midwives (96·0%, 83·9-98·5), and CHWs (89·5%, 83·6-93·7) were female. Substantial differences in HRH density remained into 2023: sub-Saharan Africa had the lowest HRH densities across cadres, with the exception of CHWs, while high-income countries had the highest HRH densities. To reach 80 out of 100 on the UHC index, an additional 7·1 million (6·6-7·5) doctors, 23·9 million (21·8-26·1) nurses and midwives, 1·8 million (1·6-1·9) dentists, and 1·6 million (1·4-1·9) pharmacists are required globally. INTERPRETATION The global health workforce has expanded substantially since 1990, largely due to women entering the formal health workforce. However, this expansion has been uneven across regions and persistent shortfalls remain in doctors, nurses and midwives, dentists, and pharmacists relative to moderate UHC attainment. Addressing these gaps will require expansion of training capacity, retention and remuneration policies for early-career workers, and gender-responsive workforce arrangements. FUNDING Gates Foundation.

The paper examines how geometric design parameters affect crankshaft fracture due to fatigue using the finite element method. It explores the influence of the fillet radius on the crankpin journal, the shape of the grooves on the splined shaft, and their interaction on the crankshaft’s fatigue behavior. Using established material traits and operating load magnitudes, a finite element analysis (FEA) computational model of the crankshaft was created, and stress simulation was performed. Following the obtained results, critical points on the crankshaft were identified, followed by fatigue analysis and lifespan evaluation. Numerical simulations showed that increasing the fillet radius on the crankpin journal significantly reduces stress concentration and boosts the crankshaft’s fatigue life. Altering the geometry of the grooves on the splined shaft redistributes stress and moderately extends its lifespan. The best results came from combining both geometric changes, demonstrating the synergistic effect of optimizing design parameters. The findings provide numerical insight into the relationship between geometric features and fatigue behaviour of crankshafts and may support further research on geometry-based design optimization.

BACKGROUND AND AIMS This observational study investigated whether patients with coronary heart disease (CHD) in Europe are achieving the standards set by prevention and rehabilitation guidelines. Variability was studied: (i) between countries; (ii) between geographical risk regions; and (iii) attendance at cardiac rehabilitation (CR) with outcomes. METHODS Observational study between September 2024- February 2026 in 160 hospitals across 27 countries. Geographical risk regions were defined as high, moderate or low based on WHO cardiovascular mortality data. RESULTS Among 8590 patients with CHD (23.7% female), 17.1% were current smokers, 32.0% were obese and 33.5% reported low physical activity. 59.8% were above blood pressure target (systolic ≥ 130 and/or diastolic ≥ 80 mmHg), 82.7% were above LDL-C target (≥ 1.4 mmol/l), 32.8% had known diabetes of whom 42.2% had HbA1c ≥ 7% and 30.6% had chronic kidney disease. Prevalences of these risk factors were all highest in countries from high risk regions. 29.1% of patients attended at least one CR session, with country variability ranging from 0% to 79%, and differing by risk region (55.9% low risk, 29.7% moderate risk and 10.2% high risk; p < 0.001). Attendance at CR programme was associated with significantly better lifestyles, risk factor control and use of cardioprotective drugs. CONCLUSIONS Most European patients are not achieving targets set by prevention guidelines. There is marked variability in CR attendance, evidence of inverse care with lowest attendance in highest risk regions, despite better outcomes for CR. These results inform the challenges for implementation of the first ESC guideline on CR.

Chronological age dominates cardiovascular (CVD) risk prediction, but glycan-based measures may better reflect biological ageing. In this secondary analysis of a six-month randomized controlled trial in Slovenia, we examined whether IgG glycosylation–derived biological age (GlycanAge) tracked short-term changes in estimated CVD risk. Adults without diagnosed CVD but with at least one risk factor (119 enrolled; 101 completed the final assessment) received digital risk visualization, continuous glucose monitoring, their combination, or usual care. SCORE2 showed small numerical changes in some intervention groups, but GlycanAge remained largely stable, with only modest and inconsistent change across groups, and no association between change in SCORE2 and change in the GlycanAge–chronological age gap was detectable. Over this short timeframe, GlycanAge did not behave as a surrogate of conventional risk modification; whether it instead reflects slower immune-inflammatory ageing processes complementary to established CVD risk algorithms will require longer studies to establish.

A nonionic type V deep eutectic solvent (DES) combining hydrophobic (−)-menthol and hydrophilic resorcinol was prepared and investigated as a solvent for amphiphilic caffeine. Differential scanning calorimetry and thermogravimetric analysis were first used to determine the eutectic composition and characterize its thermal behavior. The menthol-to-resorcinol molar ratio of 2:1 was subsequently selected for physicochemical investigation. Clear homogeneous solutions containing up to 0.701 mol·kg−1 caffeine were prepared, corresponding to 136 g of caffeine per kilogram of DES. Density, speed of sound, and viscosity were measured over the temperature range from 293.15 to 313.15 K. These data were used to evaluate the thermal expansion, volumetric and acoustic properties, intermolecular free length, and concentration and temperature dependences of viscous flow. The viscosity results were further analyzed using the Arrhenius, Jones–Dole, and Eyring–Feakins approaches and compared with the behavior of caffeine in water, ethylene glycol, and methyl salicylate. DFT calculations and molecular electrostatic potential surfaces were used to examine the local organization of the DES and the possible incorporation of caffeine through interactions with both its polar and less-polar regions. The combined experimental and computational approach provides a molecular and thermodynamic basis for evaluating this DES as a caffeine-solubilizing and delivery medium.

Ancestral environmental stress can influence descendant phenotypes, yet the physiological traits underlying such effects remain poorly understood, particularly in response to heterologous stress. We investigated whether chronic chromium (Cr) exposure in the parental generation is associated with persistent physiological differences in Arabidopsis thaliana F2 descendants. Wild-type plants were exposed to 2.5 μM hexavalent chromium [Cr(VI)] supplied as potassium dichromate (K2Cr2O7) from the seedling stage until seed set. The resulting F2 lineage derived from chromium-exposed ancestors (2.5F2) was subsequently grown under control conditions or challenged with salinity (25 mM NaCl) or cadmium stress (25 μM Cd). Growth traits, biomass allocation, antioxidant enzyme activities, total soluble proteins, and elemental composition were assessed at the flowering stage. Significant lineage × treatment interactions were observed for root growth, APX activity, and cadmium partitioning. Under cadmium stress, 2.5F2 plants maintained longer roots and higher shoot biomass than wild-type plants. The most pronounced lineage-specific difference was observed for ascorbate peroxidase (APX) activity: whereas wild-type plants exhibited strong stress-induced APX activation, the 2.5F2 lineage maintained elevated APX activity across all treatments in both shoots and roots. Elemental analysis further revealed altered metal homeostasis, with 2.5F2 plants accumulating less cadmium in roots but more in shoots, resulting in a higher shoot-to-root cadmium ratio, while root iron concentrations remained consistently higher across treatments. These findings indicate that descendants of chromium-exposed ancestors exhibit persistent physiological differences characterized by elevated antioxidant activity, altered cadmium partitioning, and improved maintenance of root growth under cadmium stress.

This study presents an experimental investigation of a Savonius wind turbine conducted under controlled wind tunnel conditions. Turbine performance was evaluated at inlet airflow velocities of 5, 7, and 9 m/s. Airflow velocities were measured upstream and downstream of the turbine to determine the effective rotor velocity, while rotational speed measurements enabled calculation of the tip-speed ratio (TSR). The airflow velocity distribution along the turbine height and width was analysed to examine air–blade interactions and identify regions influencing turbine performance. The results demonstrate a strong dependence of rotor behaviour on inlet airflow conditions, with improved performance observed at higher velocities. Smoke-based flow visualisation provided qualitative insight into airflow patterns and vortex formation around the blades, confirming the influence of flow guidance on turbine operation. These findings contribute to a better understanding of Savonius wind turbine aerodynamics and support further optimisation of turbine design and flow control strategies.

This paper analyzes the application of a vibro-impact element as a dynamic absorber for a Duffing oscillator. The Duffing oscillator is a nonlinear oscillator, modeled here as a single-degree-of-freedom system with a nonlinear spring. The complete system consists of a body performing translational oscillatory motion, a drive mechanism, a slider, a spring that connects the oscillator to the slider, and a vibro-impact element, in the form of the ball, that performs translational motion with impacts. For comparison, the response of the Duffing oscillator without the absorber is also analyzed. The differential equations of motion of both systems are derived using Lagrange’s equations of the second kind, and solved numerically. The results are presented in the form of amplitude–frequency diagrams and time–displacement diagrams. It is shown that the amplitude of the main body is reduced when it is coupled with an impact element. The way in which this is affected by the stiffness of the spring, that connects the ball and Duffing oscillator, is presented. For selected excitation frequencies the basins of attraction of the ball are obtained. In this way, the set of possible initial conditions for which the system behaves like vibro-impact or purely oscillatory one, is determined.

BACKGROUND The inverse relationship between vitreous humour (VH) glucose and lactate, classically used in the Traub formula, is widely applied in post-mortem biochemistry. METHODS We analysed 127 VH samples from external examinations and forensic autopsies performed in a hospital forensic setting (PMI 4-187 h; 58 septic and 69 non-septic deaths). Glucose was available in 78 cases, lactic acid in all 127. Cases were stratified by PMI window, septic status and storage condition. Spearman correlations and non-parametric comparisons were applied. RESULTS Within the first 24 h post-mortem, glucose and lactic acid showed significant opposite correlations with PMI. Glucose reached a low-value floor of approximately 2 mg/dl by 25-48 h, after which no meaningful PMI-related decrease was observed. Lactic acid showed a different trajectory: septic and non-septic cases had similar baseline levels at ≤10 h, but diverged thereafter, with continued increase in septic cases through 25-48 h. This divergence emerged after glucose depletion, suggesting glucose-independent lactate accumulation. Glucose-lactate coupling was absent in septic cases and weak in non-septic cases. CONCLUSIONS VH glucose and lactic acid showed limited evidence of direct stoichiometric coupling in this hospital cohort. Glucose reflected PMI mainly within the first 24 h, whereas its interpretative value declined after reaching a post-mortem floor. Lactic acid showed a sepsis-associated post-mortem amplification not explained by glucose availability alone, possibly reflecting autolytic processes. These findings do not invalidate the Traub formula in its original diagnostic context, but caution against its uncritical application in heterogeneous forensic cohorts.

Organic semiconductors, particularly conjugated polymers, are critical for advancing flexible electronics. Their electrical conductivity is enhanced by increasing carrier concentration through doping by blending small atoms or molecules, which can introduce Coulombic traps and disrupt packing. Here, we elucidate a molecular design principle that leverages dopant energy depth quantified by ΔE, which is the difference between appropriate frontier orbital energies of the doped polymer and its counterion, to mitigate disorder and simultaneously improve conductivity and the Seebeck coefficient. Using a modified Gaussian disorder model that incorporates carrier screening, we simulate the density of states and validate our findings experimentally with iodine- and Magic Blue-doped poly(3-hexylthiophene) (P3HT). Our results reveal that deeper dopant frontier energy levels significantly reduce energetic disorder and enhance transport properties when the carrier-counterion separation is small. We identify a saddle-point behavior in conductivity as a function of ΔE and show that ΔE can significantly boost conductivity when the dopant is located close to the backbone. This work introduces ΔE as a powerful molecular lever for designing high-performance organic semiconductors, offering a new design rule to overcome the long-standing trade-off between conductivity and Seebeck coefficient, thereby increasing thermoelectric efficiency in doped conjugated polymers.