Nevin Manimala

Phys Rev Lett. 2026 Feb 20;136(7):078301. doi: 10.1103/6cdq-1nvv.

ABSTRACT

Many swimming microorganisms navigate their environment by modulating the curvature of their swimming trajectories in response to external cues. Here, we show that the biflagellate alga Chlamydomonas reinhardtii swims in circles and actively switches its trajectory handedness in response to orthogonal illumination: the cell swims counterclockwise at low light intensities yet clockwise at high light intensities. This handedness switching arises from light-dependent modulation of flagellar beating, including rapid and reversible changes in beat extension, phase, and-crucially-beat plane orientation. Using high-speed imaging and hydrodynamic modeling, we reveal that this beat plane reorientation is critical for Chlamydomonas to swim orthogonally to light as well as to dynamically modulate its trajectory curvature, enabling transitions between global exploration and localized searching in spatially structured light fields. Our results establish beat plane reorientation as a novel mechanism for curvature control in microswimmer navigation.

PMID:41791052 | DOI:10.1103/6cdq-1nvv

Phys Rev Lett. 2026 Feb 20;136(7):076301. doi: 10.1103/td98-5ltj.

ABSTRACT

Collision of quantum particles remains an effective way of probing their mutual statistics. Colliders based on quantum point contacts in quantum Hall edge states have been successfully used to probe the statistics of the underlying quantum particles. Notwithstanding the extensive theoretical work focusing on pointlike colliders, when it comes to experiment, the colliders are rarely pointlike objects and can support a resonant level or multiple tunneling points. We present a study of a paradigmatic extended (non-point-like) fermionic collider (and an extension to bosonic colliders). As with particle interferometers, in an extended collider there is an infinite number of trajectories for any single- or multiparticle event. Self-interference of the former can lead to an apparent bunching of fermions when we compare the cross-current correlator with a classical benchmark representing two colliding beams. In view of this apparent bunching behavior of fermions, we identify an experimentally accessible current correlator, which reveals the true mutual statistics of fermions.

PMID:41791047 | DOI:10.1103/td98-5ltj

Phys Rev Lett. 2026 Feb 20;136(7):070602. doi: 10.1103/945c-11wt.

ABSTRACT

In the present Letter, we introduce, develop, and investigate a connection between multiphoton quantum interference, a core element of emerging photonic quantum technologies, and Hopfield-like Hamiltonians of classical neural networks, the paradigmatic models for associative memory and machine learning in systems of artificial intelligence. Specifically, we show that combining a system composed of N_{ph} indistinguishable photons in superposition over M field modes, a controlled array of M binary phase shifters, and a linear-optical interferometer, yields output photon statistics described by means of a p-body Hopfield Hamiltonian of M Ising-like neurons ±1, with p=2N_{ph}. We investigate in detail the generalized four-body Hopfield model obtained through this procedure, undergoing a transition from a memory retrieval to a memory black-out regime, i.e., a spin-glass phase, as the amount of stored memory increases. The mapping enables novel routes to the realization and investigation of disordered and complex classical systems via efficient photonic quantum simulators and describes aspects of structured photonic systems in terms of classical spin Hamiltonians.

PMID:41791042 | DOI:10.1103/945c-11wt

Med Sci Sports Exerc. 2026 Mar 3. doi: 10.1249/MSS.0000000000003967. Online ahead of print.

ABSTRACT

INTRODUCTION: The benefits of exercise for cardiovascular disease prevention are well established, yet most patients fail to adopt regular exercise despite healthcare provider recommendations. While healthcare provider recommendations provide interpersonal support, exercise adoption requires the development of intrapersonal motivation and the presence of a supportive environment. The Exercise is Medicine (EIM) program utilizes healthcare provider referrals to connect patients with a community that fosters the translation of exercise beliefs into behaviors. The purpose of this study was to examine the biopsychosocial and behavioral outcomes of the EIM program.

METHODS: Participants were referred by healthcare providers through electronic medical records. Participants engaged in sixteen group sessions and three one-on-one sessions (two before and one after the group sessions) and completed validated measures to assess the biopsychosocial model of health.

RESULTS: The EIM program demonstrated significant improvements in biological and behavioral markers. Notably, exercise participation increased by an average of 64.7 minutes (95% CI: 46.6 to 82.8). Body mass index decreased by 0.48 units (95% CI: -0.63 to -0.32), while perceived stress scores declined by 1.08 points (95% CI: -1.59 to -0.56). Participants also experienced an improvement in health-related quality of life, with general health scores rising by 5.59 points (95% CI: 4.39 to 6.78). Systolic blood pressure decreased by 2.9 mmHg (95% CI: -3.9 to -1.9). Additionally, there was a 22% reduction in depressive symptoms (p < 0.001) and a 9% reduction in perceived stress (p < 0.001). Increases in exercise time were associated with improvements in key behavioral determinants such as self-efficacy, affective judgment/passion, and tolerance.

CONCLUSIONS: Overall, these findings underscore the program’s positive impact on cardiovascular health and mental well-being in a real-world community setting.

PMID:41791037 | DOI:10.1249/MSS.0000000000003967

Retina. 2026 Mar 3. doi: 10.1097/IAE.0000000000004825. Online ahead of print.

ABSTRACT

PURPOSE: To evaluate the outcomes of pars plana vitrectomy combined with epiretinal proliferation (EP) embedding and temporal inverted internal limiting membrane (ILM) flap technique in cases of lamellar macular hole (LMH).

METHODS: This retrospective study included data from 17 consecutive patients who underwent EP embedding combined with the temporal inverted ILM flap technique for LMH. The best-corrected visual acuity (BCVA) and optic coherence tomography data were analyzed at baseline and postoperative period.

RESULTS: Anatomic closure was achieved in 100% of patients. The mean baseline and final BCVA were LogMAR 0.53 ± 0.25 (Snellen 20/67) and 0.18 ± 0.19 (Snellen 20/30), respectively, demonstrating a statistically significant improvement (p < 0.001). Furthermore, final BCVA was significantly higher in patients with a preoperative BCVA better than LogMAR 0.5 (Snellen > 20/63) (p =0.001). The central retinal thickness (CRT) improved considerably from 115.5± 40.8 μm preoperatively to 208.4 ± 51.5 μm (p<0.001) at the final visit.

CONCLUSIONS: The EP embedding surgery combined with the temporal inverted ILM flap technique can provide improved anatomical and functional outcomes in patients with LMH. Our findings highlight that early intervention prior to severe visual loss and outer retinal defect development can be further beneficial in LMH cases.

PMID:41791036 | DOI:10.1097/IAE.0000000000004825

Rev Esc Enferm USP. 2026 Feb 27;60:e20250309. doi: 10.1590/1980-220X-REEUSP-2025-0309en. eCollection 2026.

ABSTRACT

OBJECTIVE: To assess the impact of invasive mechanical ventilation on renal function and to verify the predisposing factors for the development of acute kidney injury in relation to the use of invasive mechanical ventilation in intensive care.

METHOD: An observational, retrospective, quantitative cohort study. The sample was non-probabilistic, of convenience, and consisted of 51 patients. Patient severity was assessed using the Simplified Acute Physiology Score and Sequential Organ Failure Assessment. All tests were two-tailed, and p < 0.05 was considered statistically significant.

RESULTS: Among patients with kidney injury on invasive mechanical ventilation, 41.2% presented with severe kidney injury (stage 3 of the Kidney Disease Initiative Global Outcomes). The duration of mechanical ventilation was longer in patients with acute kidney injury compared to those without renal impairment (19 versus four days).

CONCLUSION: The impact of mechanical ventilation in critically ill patients was evidenced by the higher prevalence of severe acute kidney injury. Invasive ventilatory support was more prevalent among older adults, highlighting the severity of the patients based on the Simplified Acute Physiology Score and Sequential Organ Failure Assessment scores, and consequently a higher risk of death.

PMID:41791003 | DOI:10.1590/1980-220X-REEUSP-2025-0309en

Int J Oral Maxillofac Implants. 2026 Mar 6;0(0):1-24. doi: 10.11607/jomi.11673. Online ahead of print.

ABSTRACT

PURPOSE: To evaluate both the clinical and radiographic effects of adjunctive systemic azithromycin in the non-surgical approach to treating peri-implantitis associated intrabony defects.

MATERIALS AND METHODS: This retrospective analysis included 28 patients (36 implants) presenting peri-implantitis, characterized by peri-implant lesions showing intrabony defects. All of them received non-surgical treatment consisting of submucosal debridement, implant surface decontamination, minor curettage together with submucosal irrigation with 0.12% chlorhexidine digluconate and with the administration of systemic azithromycin (500 mg/day for 3 days). Measurements of clinical and radiographic outcomes were recorded at baseline and after a minimum follow-up period of 12 months.

RESULTS: Mean follow-up of cases was 22.9±13.6 months. At follow-up, the average reduction in probing pocket depth (PPD) was 3.9 ± 1.5 mm. The radiographic intrabony defect depth decreased by 2.2 ± 1.6 mm and bone gain was 2.6 ± 1.7 mm. Baseline PPD and intrabony defect were statistically significant correlated with radiographic bone fill (r=0.499, p=0.002 and r=0.465, p=0.004; respectively). Disease resolution was achieved in 66.7% of treated implants.

CONCLUSIONS: Within the limitations of the study design, non-surgical approach with adjunctive use of systemic azithromycin for the treatment of peri-implantitis associated lesions with intrabony defects may lead to significant clinical and radiographic improvements.

PMID:41790997 | DOI:10.11607/jomi.11673

Epidemiology. 2026 Mar 2. doi: 10.1097/EDE.0000000000001967. Online ahead of print.

ABSTRACT

Air quality regulations and programs are vital for protecting the public from harms caused by air pollution. To support these actions, numerous epidemiological studies have sought to identify the pollutants most responsible for adverse outcomes. These studies often used statistical adjustments for co-pollutants in outcome regression models, a practice also commonly applied to assess interactions between co-pollutants. Here, we highlight possible pitfalls of multi-pollutant analyses. Indiscriminate co-pollutant adjustment can induce noncausal associations through collider adjustment, distorting effect estimates for individual air pollutants. We describe the underlying mechanisms and provide empirical evidence on how such bias may realistically influence the relationships between air pollution and health outcomes from a well-characterized Canadian national cohort alongside a simulation study. Additionally, we discuss strategies to mitigate the impact of this bias. Given the widespread interest in multi-pollutant approaches among the scientific and policy communities, greater caution is needed when conducting and interpreting research on multiple pollutants.

PMID:41790994 | DOI:10.1097/EDE.0000000000001967

J Urol. 2026 Mar 6:101097JU0000000000005027. doi: 10.1097/JU.0000000000005027. Online ahead of print.

ABSTRACT

PURPOSE: We sought to review our experience with the postoperative use of ureteral stents with and without extraction strings in a large series of pediatric patients following robotic pyeloplasty (RALP).

MATERIALS AND METHODS: All RALP at our institution from 2012-present were retrospectively reviewed. Patients with <60 days of follow-up, preoperative nephrostomy tubes, and redo pyeloplasty were excluded. Statistical analysis was performed.

RESULTS: A total of 245 patients underwent RALP: 179 (73%) patients had ureteral stents with extraction strings (SWES) and 66 (27%) had internalized stents. Groups were similar with regards to demographics and perioperative characteristics, except for longer operative times in the internalized stent group (p=0.01).No statistically significant difference in postoperative complications (OR 0.77, 95% CI 0.35-1.68, p=0.5) and urinary tract infections (OR 0.72, 95% CI 0.24-2.20, p=0.6) were observed between SWES compared to internalized stents. No difference in Clavien-Dindo Grade 3 complications were seen between groups (OR 1.78, 95% CI 0.49-6.41, p=0.4). Subgroup analysis did not reveal increased risk for postoperative complications or UTI with female gender, prior UTI history, or circumcision status (p≥0.16). Non-use of antibiotic prophylaxis was associated with increased risk of postoperative UTI in the SWES group (p=0.02). Of patients with SWES, 21 (12%) required stent removal in the office setting, 3 (1.7%) required removal in the operating room under anesthesia, and 153 (86%) were able to remove at home.

CONCLUSIONS: Ureteral stents with extraction strings were not associated with an increased risk of postoperative UTI or complications in our series.

PMID:41790987 | DOI:10.1097/JU.0000000000005027

Lupus. 2026 Mar 6:9612033261432154. doi: 10.1177/09612033261432154. Online ahead of print.

ABSTRACT

ObjectiveType I interferons (IFN) drive systemic lupus erythematosus (SLE) pathogenesis. Some patients develop neutralizing IFN autoantibodies (anti-IFN ab), which theoretically could modify disease activity. We aimed to determine the prevalence of anti-IFN ab in patients with SLE, identify the age and when during the disease course of anti-IFN ab emerge, and assess their association with organ damage.MethodsThis cross-sectional study included 173 SLE patients from the Lund Lupus Cohort. Samples taken at routine outpatient visits were analyzed for anti-IFN ab using ELISA, and positive samples were tested for IFN neutralizing capacity with a gene-reporter assay. Longitudinal samples were analyzed to determine the time-point and age of first positive sample. Demographic and clinical data were obtained from research registries.ResultsEighteen (10.4%) patients were positive for anti-IFN ab by ELISA. Among these, antibodies from nine patients (5.2%) displayed IFN neutralizing capacity. No statistically significant differences were detected between patients positive for neutralizing antibodies and antibody-negative patients with respect to demography, organ damage or ACR classification criteria. The group with neutralizing antibodies were slightly older (median age 59 vs 45 years, p = .14) and had a higher proportion of renal involvement (67% vs 33%, p = .088). Longitudinal analysis of samples from patients with neutralizing anti-IFN ab revealed two age-related patterns: late-onset (≥65 years, n = 4), including one patient positive at diagnosis at age 69, and early-onset (≤40 years, n = 5), with antibodies present at or soon after diagnosis in four cases. Organ damage did not differ between patients with or without neutralizing antibodies (p = .65). At the latest follow-up (2-38 years after anti-IFN ab detection), three of nine patients remained free of organ damage.ConclusionsApproximately 5% of SLE patients have neutralizing anti-IFN antibodies, which may present early in disease or develop later in life. While late-onset antibodies may reflect age-related changes in immune regulation and early-onset antibodies could potentially modulate IFN-driven mechanisms, our data do not support a protective effect against organ damage.

PMID:41790986 | DOI:10.1177/09612033261432154