Tag: nevin manimala

J Math Biol. 2025 Sep 10;91(4):35. doi: 10.1007/s00285-025-02275-0.

ABSTRACT

It has been noticed that when the waiting time distribution exhibits a transition from an intermediate time power-law decay to a long-time exponential decay in the continuous time random walk model, a transition from anomalous diffusion to normal diffusion can be observed at the population level. However, the mechanism behind the transition of waiting time distribution is rarely studied. In this paper, we provide one possible mechanism to explain the origin of such a transition. A stochastic model terminated by a state-dependent Poisson clock is studied by a formal asymptotic analysis for the time evolutionary equation of its probability density function (PDF). The waiting time behavior under a more relaxed setting can be rigorously characterized by probability tools. Both approaches show the transition phenomenon of the waiting time T, which is complemented by particle simulations to shed light on the transition time scale. Our results indicate that small drift relative to noise in the state equation and a stiff response in the Poisson rate are crucial to the transitional phenomena.

PMID:40931200 | DOI:10.1007/s00285-025-02275-0

Nature. 2025 Sep;645(8080):341-347. doi: 10.1038/s41586-025-09475-0. Epub 2025 Sep 10.

ABSTRACT

Quantum simulations of many-body systems are among the most promising applications of quantum computers¹. In particular, models based on strongly correlated fermions are central to our understanding of quantum chemistry and materials problems², and can lead to exotic, topological phases of matter^3,4. However, owing to the non-local nature of fermions, such models are challenging to simulate with qubit devices⁵. Here we realize a digital quantum simulation architecture for two-dimensional fermionic systems based on reconfigurable atom arrays⁶. We utilize a fermion-to-qubit mapping based on Kitaev’s model on a honeycomb lattice³, in which fermionic statistics are encoded using long-range entangled states⁷. We prepare these states efficiently using measurement⁸ and feedforward⁹, realize subsequent fermionic evolution through Floquet engineering^10,11 with tunable entangling gates¹² interspersed with atom rearrangement, and improve results with built-in error detection. Leveraging this fermion description of the Kitaev spin model, we efficiently prepare topological states across its complex phase diagram¹³ and verify the non-Abelian spin-liquid phase³ by evaluating an odd Chern number^14,15. We further explore this two-dimensional fermion system by realizing tunable dynamics and directly probing fermion exchange statistics. Finally, we simulate strong interactions and study the dynamics of the Fermi-Hubbard model on a square lattice. These results pave the way for digital quantum simulations of complex fermionic systems for materials science, chemistry¹⁶ and high-energy physics¹⁷.

PMID:40931156 | DOI:10.1038/s41586-025-09475-0

Aesthetic Plast Surg. 2025 Sep 10. doi: 10.1007/s00266-025-05205-z. Online ahead of print.

ABSTRACT

BACKGROUND: Microfocused ultrasound (MFU) is a non-invasive technique used for facial rejuvenation, yet there is limited quantitative data on its long-term effects. This study aimed to evaluate the long-term efficacy and safety of MFU for facial rejuvenation. We utilized standardized photography along with advanced skin assessment technologies to analyze the impact of MFU on facial morphology, skin function, and patient satisfaction over a 12-month period.

METHODS: A prospective clinical study was conducted on 28 healthy female subjects (age range: 33-55 years) who underwent a single MFU treatment. Comprehensive assessments were performed at baseline and at seven follow-up time points (30 minutes, 1 week, 1 month, 3 months, 6 months, 9 months, and 12 months). Objective measurements included facial volumetric changes nasolabial fold morphology, skin physical parameters, and clinical aesthetic scores. Patient satisfaction and safety data were also collected.

STATISTICAL ANALYSIS: Longitudinal data were analyzed using linear mixed-effects models with subject-specific random intercepts to account for repeated measurements.

RESULTS: Facial volume showed significant immediate increase (5.65 ± 2.15 ml, 95% CI: 4.821-6.486, CV=37.98%, P < 0.001, Cohen’s d = 2.633) post-treatment, followed by progressive tightening, with maximum volume reduction at 3 months (- 3.37 ± 4.79 ml, 95% CI: – 5.227 to – 1.511, CV=142.26%, P < 0.001, Cohen’s d = – 0.703). Both facial and submental regions maintained statistically significant volume reduction through 12 months: Facial region: – 1.86 ± 4.72 ml (P = 0.048, Cohen’s d = – 0.39); Submental region: – 1.26±2.22 ml (95% CI: – 2.118 to – 0.394, P < 0.05, Cohen’s d = – 0.565),with the submental region demonstrating superior durability. The nasolabial fold region, volume, and maximum depth demonstrated the greatest improvement at 3 months (depth reduction: 0.28 ± 0.08 mm, p < 0.001), with ‘wide-short’ morphological subtypes exhibiting superior efficacy compared to ‘narrow-long’ subtypes (P < 0.05). Skin ultrasound collagen intensity showed progressive improvements, peaking at 9 months ( + 10.08 a.u., 95% CI: 7.73-12.44, P < 0.001, Cohen’s d = 1.54) and remained significantly elevated at 12 months with a 9.03 a.u. increase (95% CI: 6.49 to 11.58, P < 0.001, Cohen’s d = 1.38). Treatment induced significant, sustained increases in skin hydration (mean + 50.5-55.8 μS; p < 0.05; Cohen’s d 0.79-1.06) from 30 minutes through 6 months, with effects becoming non-significant at 9 months (+ 36.4 μS) and returning to baseline by 12 months. Transepidermal water loss (TEWL) decreased significantly from 1 month through 9 months, with peak improvement at 6 months (- 3.05 g/m²/h, 95% CI: – 5.39 to – 0.71, P < 0.05, Cohen’s d = – 0.54). GAIS scores peaked at 3 months (physician rating: 3.48 ± 0.48; patient rating: 3.75 ± 0.44) with strong inter-rater correlation (r = 0.728, P < 0.001) and 89.2% of patients willing to undergo retreatment. Adverse events were mild and transient, limited to erythema (67.9%) and edema (28.6%) resolving within one week.

CONCLUSION: MFU facial rejuvenation demonstrated a time-dependent efficacy profile, with peak improvements observed at 3 months and substantial benefits maintained at 9-12 months. Treatment response varied anatomically, showing most durable submental improvement. Nasolabial fold morphological subtypes significantly influenced efficacy, with ‘wide-short’ morphology correlating with superior outcomes. The procedure provided significant rejuvenation with minimal downtime, high patient satisfaction and an excellent safety profile. Level of Evidence III This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 . Trial Registrations This trial is registered with ChiCTR2400093439 (China) and NCT06286384 (ClinicalTrials.gov).

PMID:40931143 | DOI:10.1007/s00266-025-05205-z

Eur Spine J. 2025 Sep 11. doi: 10.1007/s00586-025-09347-1. Online ahead of print.

NO ABSTRACT

PMID:40931134 | DOI:10.1007/s00586-025-09347-1

Eur Spine J. 2025 Sep 11. doi: 10.1007/s00586-025-09358-y. Online ahead of print.

ABSTRACT

PURPOSE: This study aims to assess the outcomes of combining oblique lumbar interbody fusion (OLIF) with anterolateral screw fixation (ASF) and stress endplate augmentation (SEA) in comparison to OLIF combined with pedicle screw fixation (PSF) for the treatment of degenerative lumbar spinal stenosis (DLSS) in patients with osteoporosis (OP).

METHODS: We performed a retrospective analysis of patients diagnosed with DLSS who underwent OLIF in conjunction with either SEA and ASF (SEA-ASF group) or PSF (PSF group). Clinical outcomes, including the visual analog scale (VAS) scores for lumbar and leg pain, as well as the Oswestry Disability Index (ODI), were assessed at various postoperative intervals and compared to preoperative values. Additionally, radiographic outcomes such as disc height (DH), lumbar lordosis (LL), segmental lordosis (SL), cage subsidence (CS), and fusion rate were evaluated at different postoperative intervals and compared to their preoperative measurements.

RESULTS: A total of 65 patients were enrolled in the study, comprising 30 individuals in the SEA-ASF group and 35 in the PSF group. No statistically significant differences were observed in surgery-related complications between the groups. While VAS and ODI scores did not differ significantly at the 24-month follow-up, the SEA-ASF group exhibited superior scores at both 1 day and 1 month post-surgery (P < 0.05). Significant differences were observed in DH, LL, and SL at both 12 and 24 months postoperatively between the two groups (P < 0.05). At the 24-month postoperative follow-up, the incidence of CS was observed to be 16.67% (5 out of 30) in the SEA-ASF cohort and 11.43% (4 out of 35) in the PSF cohort. Statistical analysis revealed no significant difference between the two groups (P = 0.542). Fusion rates at the 24-month postoperative follow-up were 83.33% (25/30) in the SEA-ASF group and 85.71% (30/35) in the PSF group, also showing no significant difference (P = 0.791).

CONCLUSION: For the management of DLSS patients with osteoporosis, we propose that the integration of OLIF with SEA and ASF constitutes a viable therapeutic option. This approach demonstrates comparable clinical and radiological outcomes to OLIF-PSF, while offering benefits such as reduce operative duration, decrease blood loss, and minimize tissue trauma.

PMID:40931132 | DOI:10.1007/s00586-025-09358-y

Eur J Nutr. 2025 Sep 11;64(6):274. doi: 10.1007/s00394-025-03791-x.

ABSTRACT

PURPOSE: To investigate how a group-based lifestyle intervention affects food choices and if the dietary patterns at the end of the intervention are associated with incidence type 2 diabetes (T2D). We also investigated if the possible associations between diet and T2D risk were modified by the genetic risk for T2D.

METHODS: Participants in the T2D-GENE study were men with prediabetes aged 50-75 years, body mass index ≥ 25 kg/m², belonging in either low or high genetic risk score (GRS) tertile for T2D. They participated in a 3 year, group-based T2D-GENE lifestyle study (either an intervention or a control arm). Food consumption was measured with a food frequency questionnaire (FFQ) at baseline and at year 3. We included in our study all the T2D-GENE participants who had FFQ available at year 3 (n = 883). To diagnose T2D we used the following criteria, fasting plasma glucose ≥ 7.0 mmol/l, 2 h plasma glucose ≥ 11.1 mmol/l, or HbA1C ≥ 48 mmol/mol ( ≥ 6.5%). The GRS was based on 76 genetic variants associated with T2D.

RESULTS: There were statistically significant changes towards more recommended food consumption (higher frequency of whole-grain products, vegetables, and non-tropical vegetable oils) in the participants receiving lifestyle counselling as compared to their baseline and to the population controls. The intervention group reported increased consumption of healthy dietary pattern (high in e.g. vegetables, whole-grain products, and fish) and decreased consumption of unhealthy (high in e.g. meat, sausages and low-fibre products) at year three as compared to baseline. End-of-intervention healthy dietary pattern was associated with a decrease in the risk of T2D (OR 0.67, 95% CI 0.46; 0.97 in multivariable model) and end-of-intervention unhealthy pattern with increased risk (OR 1.82, 95% CI 1.26; 2.62 in multivariable model). When stratified by the GRS, the associations remained significant for the high genetic risk group.

CONCLUSION: A group-based lifestyle intervention improved diet quality. Healthy dietary pattern associated with lower risk for T2D whereas unhealthy pattern associated with higher risk. After stratification by the GRS, associations were evident in participants with a high genetic risk for T2D.

PMID:40931124 | DOI:10.1007/s00394-025-03791-x

Pediatr Res. 2025 Sep 10. doi: 10.1038/s41390-025-04363-9. Online ahead of print.

ABSTRACT

BACKGROUND: Body fat distribution patterns impact adolescent health, yet research on dietary lignans’ influence remains limited. This study investigated their association among U.S. adolescents.

METHODS: Data from 1579 adolescents (NHANES 2003-2006) were analyzed. Urinary enterolactone and enterodiol concentrations measured dietary lignan intake. Dual-energy X-ray absorptiometry assessed body fat distribution. Survey-weighted linear regression models with progressive adjustment were employed, and restricted cubic spline analyses evaluated potential non-linear relationships.

RESULTS: Urinary enterolactone levels were significantly inversely associated with android-to-gynoid fat ratio (fully adjusted model: β = -0.007, 95% CI: -0.012, -0.002, P = 0.008), indicating a significant negative relationship between enterolactone and android-to-gynoid fat ratio, with restricted cubic spline analysis confirming significant overall association (P for overall = 0.001, demonstrating the statistical significance of the entire relationship) and linear relationship (P for nonlinear = 0.064, indicating the relationship does not significantly deviate from linearity). Further analysis showed that enterodiol was positively associated with gynoid fat ratio (β = 0.360, 95% CI: 0.043, 0.677, P = 0.028), suggesting enterodiol exposure may favor gynoid fat distribution.

CONCLUSION: Dietary lignan intake significantly associates with more favorable body fat distribution patterns among U.S. adolescents, suggesting that increasing dietary lignan intake may be a potential strategy for improving adolescent body composition.

IMPACT: Dietary lignan intake, measured by urinary biomarkers, is significantly associated with favorable body fat distribution patterns in U.S. adolescents. This study highlights the role of dietary lignans, an underexplored dietary component, in influencing body fat distribution during adolescence, expanding on prior research focused on adults. These findings suggest dietary lignans as a potential nutritional strategy to improve body fat distribution in adolescents, offering insights for public health interventions targeting metabolic health in youth.

PMID:40931118 | DOI:10.1038/s41390-025-04363-9

Surg Endosc. 2025 Sep 10. doi: 10.1007/s00464-025-12138-w. Online ahead of print.

ABSTRACT

OBJECTIVE: Rigid suction-coagulation probes constrain the wrist-like articulation that is central to robotic surgery. We therefore designed a 5-mm single-use flexible suction ball coagulator (flex-SBC) with a modified core design to restore dexterity and assessed its mechanical performance and early clinical feasibility, including the effect of the common robotic gripping strategies on suction flow.

METHODS: Preclinical. The new 7 × 7 core embedded in silicone was compared with the conventional 1 × 7 core design. Shaft pliability was quantified by sagging displacement and rebound force testing. Suction flow at – 20, – 30, and – 40 kPa was measured, and the impact of grip location (electrode base vs silicone shaft) and forceps type (fenestrated or Maryland bipolar) was analyzed statistically.

CLINICAL: The flex-SBC was used in 12 consecutive robotic gastrectomies with prospective collection of device performance, adverse events, and surgeon rating on seven-domain via three-point Likert scale.

RESULTS: Preclinical. Adopting the 7 × 7 increased mean sagging displacement from 15.6 ± 1.8 to 39.3 ± 3.2 mm (p < 0.001) and reduced rebound force from 0.288 ± 0.014 to 0.059 ± 0.004 N (p < 0.001). Mean flow rates were 6.76 ± 0.88, 8.87 ± 0.43, and 10.58 ± 0.40 mL/sec at – 20, – 30, and – 40 kPa, respectively-approximately half those of a rigid probe (all p < 0.001) but still exceeding published thresholds for effective evacuation. Gripping the silicone shaft, especially with Maryland forceps, sharply reduced flow (60% reduction; p < 0.0011).

CLINICAL: All operations were completed without device-related malfunctions, injuries, or conversions. Of 84 survey ratings, connection setup, suction efficiency, tissue safety, and overall satisfaction were “satisfactory” in 100%; maneuverability was “satisfactory” in 65% and “average” in 35%. No “unsatisfactory” scores were recorded.

CONCLUSIONS: The flex-SBC bends where the robot bends, enabling safe, practical use across robot-assisted upper-GI surgery. Grip technique influences device performance, providing important implications training. Larger comparative trials should clarify whether these ergonomic gains translate into shorter operating times and improved oncologic precision.

PMID:40931103 | DOI:10.1007/s00464-025-12138-w

Appl Radiat Isot. 2025 Sep 4;226:112161. doi: 10.1016/j.apradiso.2025.112161. Online ahead of print.

ABSTRACT

Accurate determination of the parameters of each high purity germanium, HPGe detectors ensure the precision of quantitative results obtained from spectrum analysis. This study presents a comprehensive performance evaluation and long-term quality control assessment of a high-purity germanium (HPGe) gamma spectrometry system that has been operational for over 15 years. Key spectrometric measures were recorded, including energy resolution, peak shape ratios, asymmetry, peak-to-Compton ratio, relative efficiency, electronic noise, minimum detectable activity (MDA), and repeatability and reproducibility of the system. With the assistance of a calibrated source Co-60, the detector exhibited a commendable energy resolution of 2.01 keV (FWHM), along with good peak shape ratios (FWTM/FWHM = 1.73, FWFM/FWHM = 2.48) and a peak-to-Compton ratio of 52.2, indicating high resolution and zero spectral distortion. Relative detector efficiency was 33.88 % at 1332.5 keV, and electronic noise was negligible at 0.178 %. MDA for certain radionuclides was found to be in the range 0.048-0.605 Bq/kg, which showed good sensitivity even for low-activity peaks. Repeatability tests gave a coefficient of variation (%CV) less than 1 % for all peaks measured, while reproducibility was confirmed with t-test and F-test statistical tests. A Shewhart X‾-control chart revealed that at all times in all cases, measurements were within control limits, though a slight downward trend in the last few years suggests potential need for recalibration or maintenance. The findings corroborate the sustained conformity of the system to ISO/IEC 17025 quality standards and its sufficiency for precise and trustworthy gamma-ray analysis in radionuclide quantification and environmental monitoring.

PMID:40929755 | DOI:10.1016/j.apradiso.2025.112161

Int J Epidemiol. 2025 Aug 18;54(5):dyaf150. doi: 10.1093/ije/dyaf150.

ABSTRACT

BACKGROUND: Existing longitudinal cohort study data and associated biospecimen libraries provide abundant opportunities to efficiently examine new hypotheses through retrospective specimen testing. Outcome-dependent sampling (ODS) methods offer a powerful alternative to random sampling when testing all available specimens is not feasible or biospecimen preservation is desired. For repeated binary outcomes, a common ODS approach is to extend the case-control framework to the longitudinal setting.For ODS designs, we consider the impact of incomplete follow-up when missingness is completely at random (MCAR), missing at random (MAR), and missing not at random (MNAR). We further consider sampling from (i) complete cases, in which, in an attempt to maximize power, participants who dropped out before study completion were excluded; and (ii) all individuals, including those with incomplete follow-up.

METHODS: Simulation studies based on the Advancing Clinical Therapeutics Globally HIV Infection, Aging, and Immune Function Long-Term Observational Study cohort were used to examine the impact of MCAR, MAR, and MNAR missingness, assuming specimens were sampled from either (i) complete cases; or (ii) all individuals. Three ODS analytical methods were considered.

RESULTS: When longitudinal data are MNAR, ODS methods exhibit bias similar to that seen in random sampling. MNAR and MAR bias is exacerbated when sampling only participants with complete follow-up. Simulations indicate that ODS analyses that include participants with incomplete follow-up are robust to MCAR and less biased by MAR missingness.

CONCLUSION: Dropout is common in longitudinal cohort studies. Investigators utilizing ODS methods must consider the effect of dropout in both the retrospective sampling design and analysis.

PMID:40929733 | DOI:10.1093/ije/dyaf150