bluuebunny/crossref_metadata_2025_split huggingface dataset:
Silencing p75NTR regulates osteogenic differentiation and angiogenesis of BMSCs to enhance bone healing in fractured rats
Authors: Wu Zhifeng , Yang Yongming , Wang Ming 
Published: March 2024

Abstract
Background
Fractures heal through a process that involves angiogenesis and osteogenesis but may also lead to non-union or delayed healing. Bone marrow mesenchymal stem cells (BMSCs) have been reported to play a pivotal role in bone formation and vascular regeneration and the p75 neurotrophin receptor (p75NTR) as being an important regulator of osteogenesis. Herein, we aim to determine the potential mediation of BMSCs by p75NTR in bone healing.

Methods
Rat BMSCs were identified by flow cytometry (FCM) to detect cell cycle and surface markers. Then transfection of si/oe-p75NTR was performed in BMSCs, followed by Alizarin red staining to detect osteogenic differentiation of cells, immunofluorescence double staining was performed to detect the expression of p75NTR and sortilin, co-immunoprecipitation (CO-IP) was conducted to analyze the interaction between p75NTR and sortilin, and EdU staining and cell scratch assay to assess the proliferation and migration of human umbilical vein endothelial cells (HUVECs). The expression of HIF-1α, VEGF, and apoptosis-related proteins were also detected. In addition, a rat fracture healing model was constructed, and BMSCs-si-p75NTR were injected, following which the fracture condition was observed using micro-CT imaging, and the expression of platelet/endothelial cell adhesion molecule-1 (CD31) was assessed.

Results
The results showed that BMSCs were successfully isolated, p75NTR inhibited apoptosis and the osteogenic differentiation of BMSCs, while si-p75NTR led to a decrease in sortilin expression in BMSCs, increased proliferation and migration in HUVECs, and upregulation of HIF-1α and VEGF expression. In addition, an interaction was observed between p75NTR and sortilin. The knockdown of p75NTR was found to reduce the severity of fracture in rats and increase the expression of CD31 and osteogenesis-related proteins.

Conclusion
Silencing p75NTR effectively modulates BMSCs to promote osteogenic differentiation and angiogenesis, offering a novel perspective for improving fracture healing.
18F-FDG PET/CT based model for predicting malignancy in pulmonary nodules: a meta-analysis
Authors: Li Yu , Shi Yi-Bing , Hu Chun-Feng 
Published: March 2024

Abstract
Background
Several studies to date have reported on the development of positron emission tomography (PET)/computed tomography (CT)-based models intended to effectively distinguish between benign and malignant pulmonary nodules (PNs). This meta-analysis was designed with the goal of clarifying the utility of these PET/CT-based conventional parameter models as diagnostic tools in the context of the differential diagnosis of PNs.

Methods
Relevant studies published through September 2023 were identified by searching the Web of Science, PubMed, and Wanfang databases, after which Stata v 12.0 was used to conduct pooled analyses of the resultant data.

Results
This meta-analysis included a total of 13 retrospective studies that analyzed 1,731 and 693 malignant and benign PNs, respectively. The respective pooled sensitivity, specificity, PLR, and NLR values for the PET/CT-based studies developed in these models were 88% (95%CI: 0.86–0.91), 78% (95%CI: 0.71–0.85), 4.10 (95%CI: 2.98–5.64), and 0.15 (95%CI: 0.12–0.19). Of these endpoints, the pooled analyses of model sensitivity (I2 = 69.25%), specificity (I2 = 78.44%), PLR (I2 = 71.42%), and NLR (I2 = 67.18%) were all subject to significant heterogeneity. The overall area under the curve value (AUC) value for these models was 0.91 (95%CI: 0.88–0.93). When differential diagnosis was instead performed based on PET results only, the corresponding pooled sensitivity, specificity, PLR, and NLR values were 92% (95%CI: 0.85–0.96), 51% (95%CI: 0.37–0.66), 1.89 (95%CI: 1.36–2.62), and 0.16 (95%CI: 0.07–0.35), with all four being subject to significant heterogeneity (I2 = 88.08%, 82.63%, 80.19%, and 86.38%). The AUC for these pooled analyses was 0.82 (95%CI: 0.79–0.85).

Conclusions
These results suggest that PET/CT-based models may offer diagnostic performance superior to that of PET results alone when distinguishing between benign and malignant PNs.
Same game, different worlds? General conditions, perceived stress, and associations between stress and past season injuries in elite female and male ice hockey players
Authors: Wörner Tobias , Kauppinen Stefan , Eek Frida 
Published: March 2024

Abstract
Background
Ice hockey is played by women and men but the arena they play in may differ substantially. Potential differences in general conditions to play the sport may be associated to perceived stress, which has shown to be related to athletic injury in other sports. Therefore, this study aimed to describe and compare general conditions for playing ice hockey, stress levels, and the association between perceived stress and injury occurrence among elite female and male players.

Methods
Prior to the 2022–2023 season all female and male players from the top ice hockey leagues in Sweden were invited to an online survey. Players provided information about their general conditions for playing ice hockey and reported perceived stress during the previous season on the Perceived Stress Scale (PSS-10; sum score range 0–40) and current stress on the Single Item Stress Question (SISQ; scale range 1–5). Injuries during the previous season were self-reported on a modified version of the Oslo Sports Trauma Research Center – Overuse Injury Questionnaire.

Results
We received responses from 360 players (170 females and 190 males). Female players more frequently reported additional occupations besides ice hockey and less medical support during games and practices than male players (p < .001). General stress levels were significantly higher among female players (mean PSS score [SD]: 17.4 [5.6] vs 14.1 [5.6], p < 0.001; SISQ median [IQR]: 3 [2–3] vs 2 [1–3], p < 0.001). There was a statistically significant but weak correlation between past season injury and perceived stress (PSS score: rho 0.29; SISQ: rho 0.24). This correlation was stronger among males than females (PSS score: 0.38 vs 0.162; SISQ: 0.29 vs 0.16, p’s < 0.05). Players with substantial injuries during previous season had higher previous and current stress levels than players without injury, a difference that was largest and statistically significant only among male players.

Conclusions
General conditions for playing elite ice hockey are inequal for female and male athletes. Stress levels of elite ice hockey players were comparable to the general population. Experience of severe injuries during the previous season was associated to higher levels of perceived stress. This association is stronger among male players, which may be due to greater economic dependency.
“The power imbalance was blown out the window”: developing and implementing creative workshops to enhance communication of statistics in patient and public involvement in clinical trials
Authors: Goulao Beatriz , Morisson Susan 
Published: March 2024

Abstract
Background
Despite the importance of statistical and numerical aspects in key decisions related to clinical trials and their impact in patient’s care, patient and public involvement remains underdeveloped in this field. Communication is a barrier to enable successful involvement of patients and the public in numerical aspects. Treatment important differences, a crucial numerical aspect in trials, is considered a priority for patient and public involvement. Creative methods have been proposed to improve communication of technical concepts with members of the public; and to democratise and improve inclusivity in patient and public involvement in health research.

Methods
Working with creative professionals, public partners, and statisticians, we aimed to develop, pilot and implement creative workshops to promote a shared understanding of treatment important differences; and co-develop creative prototypes that could be used to communicate the statistical concept to a wider audience in the future. Three 2 to 4 h creative workshops based in the UK were delivered. The first two workshops included 22 participants. They were online and worked as pilots to refine the final in-person workshop via participant feedback and discussion. The final workshop focused on treatment important differences, and we collected information from participants on expectations, subjective numeracy, and experience.

Results
The final workshop included 13 participants (5 creative professionals, 4 public partners, and 4 clinical trial statisticians). Participants reported creative workshops helped improve communication of treatment important differences between stakeholders reaching a common understanding of their meaning; and helped democratise knowledge exchange. Each group developed a creative prototype to communicate about treatment important differences with a wider audience, including a song, game, and a cartoon. Participants recommended the format to improve communication of other statistical or complex concepts between stakeholders.

Conclusions
Creative workshops can promote shared understanding of complex, statistical concepts and co-development of creative outputs amongst stakeholders. Future work should explore generalisability of the intervention, and what outcomes might be important to consider when implementing creative workshops in patient and public involvement practice.
Scaling-up and scaling-out the Systems Analysis and Improvement Approach to optimize the hypertension diagnosis and care cascade for HIV infected individuals (SCALE SAIA-HTN): a stepped-wedge cluster randomized trial
Authors: Hazim Carmen E. , Dobe Igor , Pope Stephen , Ásbjörnsdóttir Kristjana H. , Augusto Orvalho , Bruno Fernando Pereira , Chicumbe Sergio , Lumbandali Norberto , Mate Inocêncio , Ofumhan Elso , Patel Sam , Rafik Riaze , Sherr Kenneth , Tonwe Veronica , Uetela Onei , Watkins David , Gimbel Sarah , Mocumbi Ana O. 
Published: March 2024

Abstract
Background
Undiagnosed and untreated hypertension is a main driver of cardiovascular disease and disproportionately affects persons living with HIV (PLHIV) in low- and middle-income countries. Across sub-Saharan Africa, guideline application to screen and manage hypertension among PLHIV is inconsistent due to poor service readiness, low health worker motivation, and limited integration of hypertension screening and management within HIV care services. In Mozambique, where the adult HIV prevalence is over 13%, an estimated 39% of adults have hypertension. As the only scaled chronic care service in the county, the HIV treatment platform presents an opportunity to standardize and scale hypertension care services.
Low-cost, multi-component systems-level strategies such as the Systems Analysis and Improvement Approach (SAIA) have been found effective at integrating hypertension and HIV services to improve the effectiveness of hypertension care delivery for PLHIV, reduce drop-offs in care, and improve service quality. To build off lessons learned from a recently completed cluster randomized trial (SAIA-HTN) and establish a robust evidence base on the effectiveness of SAIA at scale, we evaluated a scaled-delivery model of SAIA (SCALE SAIA-HTN) using existing district health management structures to facilitate SAIA across six districts of Maputo Province, Mozambique.

Methods
This study employs a stepped-wedge design with randomization at the district level. The SAIA strategy will be “scaled up” with delivery by district health supervisors (rather than research staff) and will be “scaled out” via expansion to Southern Mozambique, to 18 facilities across six districts in Maputo Province. SCALE SAIA-HTN will be introduced over three, 9-month waves of intensive intervention, where technical support will be provided to facilities and district managers by study team members from the Mozambican National Institute of Health. Our evaluation of SCALE SAIA-HTN will be guided by the RE-AIM framework and will seek to estimate the budget impact from the payer’s perspective.

Discussion
SAIA packages user-friendly systems engineering tools to support decision-making by frontline health workers and to identify low-cost, contextually relevant improvement strategies. By integrating SAIA delivery into routine management structures, this pragmatic trial will determine an effective strategy for national scale-up and inform program planning.

Trial registration
ClinicalTrials.gov NCT05002322 (registered 02/15/2023).
Membrane-based optical fiber Bragg grating pressure sensor for health monitoring of pile foundations
Authors: Wu Wenjing , Sun Bin , Chen Shengyu , Gong Weiming , Wei Heming 
Published: March 2024

A fiber Bragg grating (FBG) pressure sensor is proposed, designed, and fabricated for lateral earth pressure sensing, in which the FBG sensor is mounted on a 3D printed trestle structure combined with a membrane. The applied pressure can cause a deformation on the membrane, and then this deformation applied on the trestle structure causes tensile strain on the FBG. The proposed sensor is functionalized as a high-sensitive pressure transducer capable of converting the pressure into strain on the FBG. Here, the performance of the proposed sensor is numerically and experimentally investigated. The results show that the pressure sensitivity at 30°C is 10.62 pm/kPa within a range of 0–0.6 MPa. Due to the thermal expansion of the structure, the pressure sensitivity coefficient decreases with the increase of temperature; however, the cross effect between the temperature and strain on the sensing sensitivity is investigated and can be eliminated. The fabricated sensor has advantages of high sensitivity, good stability, and high pressure resolution, so it has potential in the field of structural health monitoring.
Optical properties of chain-like atmospheric aerosol particles
Authors: Liu Hanyan , Li Xingcai , Wang Juan , Cheng Ning 
Published: March 2024

Using the generalized multiparticle Mie-solution method, this study examines the optical properties of chain-like particles under different atmospheric conditions and various arrangements. The structural composition of aerosols exhibits a more pronounced impact on their extinction and absorption cross sections when the incident wavelength is below 600 nm, whereas significant changes are observed in backscattering cross sections for incident wavelengths above 600 nm. As the orientation angle between the incident wave and particle chain increases, the extinction cross sections and absorption cross sections exhibit varying degrees of decline. Furthermore, marine atmospheric aerosol chains demonstrate similar extinction cross sections to those of polluted atmospheric aerosols, and their absorption cross sections closely resemble those of clean atmospheric aerosols. In addition, for a particle chain of fixed length, the greater the disparity in particle sizes within the chain, the larger the difference between the backscattering cross section and that of the chains with equal particle sizes. This research provides theoretical support for assessing the climate effects of aerosols and inverting aerosol properties by LiDAR data.
Methods for improving imaging quality of a small-distance high-speed rotational reflection tracking system
Authors: Liu Haoran , Wu Bin , Feng Luyuan , Zhang Jianwei , Fan Fei , Zhang Zhen , Sun Zefeng , Zhao Zongyang , Kang Jiehu 
Published: March 2024

The imaging
quality of a rotational
reflection high-speed tracking system is greatly affected by the
optical characteristics of the reflector and the depth of field
limitations of the imaging system, especially for tracking systems
working in small distances. In order to improve the imaging quality,
this paper focused on two factors that affect the imaging quality:
double vision caused by the optical characteristics of reflectors and
blurring caused by the depth of field of imaging systems. This paper
quantified the impact of these two factors on imaging through
theoretical analysis, proposed a method of changing the hardware
position, and conducted a simulation and experiments. The results show
that the proposed solution in this paper can effectively improve the
imaging quality of the system. The content studied in
this paper has certain significance in the field of high-speed
tracking of rotating reflectors and can provide reference for relevant
researchers.
Photodetector with a metalens packaging module for visible light communication based on RGBY illumination LED light source
Authors: Xi JianFei , Liu Jay GuoXu , Tu Yan , Yang Lanlan , Qin Tao 
Published: March 2024

A novel, to the best of our knowledge, photodetector with a metalens packaging module used as the visible light communication (VLC) receiver is proposed and designed. An LED consisting of red, green, blue, and yellow chips (RGBY-LED) is adopted as the transmitter for intensity modulation direct detection VLC systems. A metalens array with a numerical aperture (NA) of 0.707 used as a polarization-insensitive planar lens of the VLC system receiver is designed at wavelengths of 457, 523, 592, and 623 nm corresponding to blue, green, yellow, and red for high efficiency. Compared with a traditional Fresnel lens positive-intrinsic-negative (PIN) photodetector module as the VLC receiver, the introduction of a metalens module can decrease the form factor of the VLC receiver module and, in particular, it is much thinner. The combination of the multi-color LED transmitter and photodetector metalens packaging module receiver can increase the modulation bandwidth due to four different wavelengths used for the VLC system. Finite-difference time domain (FDTD) simulations are performed to validate the performance of the photodetector with a metalens module. It is revealed that the corresponding efficiencies of 57.5%, 55.4%, 57%, and 56.3% were achieved at wavelengths of 623, 592, 523, and 457 nm, respectively, based on a metalens array with a 0.707 NA and 2.5 µm radius of the active area of the photodetector. It is a promising technology for indoor VLC systems such as those for smart phones and other Internet of Things devices due to the need for compact packaging for the receiver.
The influence of obesity and fat distribution on ankle muscle coactivation during gait
Authors: Maktouf Wael , Ferhi Hamza , Boyas Sébastien , Beaune Bruno , Gaied Chortane Sabri , Portero Pierre , Durand Sylvain 
Published: March 2024

Background
Excessive body weight is associated with gait alterations. In none of previous studies, body fat distribution has been considered as a factor that could change gait parameters and induce different neuromuscular adaptations.

Objective
This multicenter, analytical, and cross-sectional study aimed to investigate the influence of the body mass distribution on gait parameters and ankle muscle coactivation in obese individuals.

Methods
Three distinct groups were included in the study: a non-obese control group (CG, n = 15, average age = 32.8 ± 6.5 years, BMI = 21.4 ± 2.2 kg/m2), an obese-android group characterized by a Waist to Hip Ratio (WHR) greater than 1 (OAG, n = 15, age = 32.4 ± 3.9 years, BMI = 41.4 ± 3.9 kg/m2, WHR = 1.2 ± 0.2), and an obese-gynoid group with a WHR less than 1 (OGG, n = 15, age = 35.4 ± 4.1 years, BMI = 40.0 ± 5.7 kg/m2, WHR = 0.82 ± 0.3). All participants walked on an instrumented gait analysis treadmill at their self-selected walking speed for one minute. Spatiotemporal parameters, walking cycle phases, vertical ground reaction force (GRFv) and center of pressure (CoP) velocity were sampled from the treadmill software. Electromyography (EMG) activity of the gastrocnemius medialis (GM), the soleus (SOL) and tibialis anterior (TA) were collected during walking and used to calculate coactivation indexes (CI) between ankle plantar and dorsal flexors (GM/TA and SOL/TA) for the different walking cycle phases.

Results
Compared to OAG, OGG walked with shorter and larger strides, lower CoP velocity and GRFv. During the single support phase, SOL/TA coactivation was higher in OAG compared to OGG (p < .05). During the propulsion phase, SOL/TA coactivation was higher in OGG compared to OAG (p < .05).

Conclusion
Gait parameters and ankle muscle coactivation in obese individuals seem to be strongly dependent on body mass distribution. From the biomechanical point of view, body mass distribution changes gait strategies in obese individuals inducing different neuromuscular adaptations during the single support and propulsion phases.
Liver Abscess Due to Migrated Foreign Body
Authors: Sengupta Kushan , Bhayani Priyansh , Parameswaran Sarojini Ashok 
Published: March 2024

ABSTRACT
Liver abscess secondary to a migrated foreign body (fish bone) is a rare entity where early diagnosis helps in management and thereby improves the prognosis. We present a unique case of a 47-year-old hypertensive man who presented with high-grade fever, chills, rigors, and abdominal pain. On evaluation, he was found to have a liver abscess secondary to a foreign body (fish bone), although no history of foreign body ingestion was recalled by the patient. Drainage of liver abscess and removal of the foreign body comprise the treatment of choice. We report the successful management of a patient with liver abscess from a migrated fish bone. This case underscores the importance of considering foreign body ingestion as a potential cause of liver abscess, even when patients cannot recall such an event. Timely diagnosis and intervention, along with advances in imaging techniques, contribute to successful outcomes in these rare but challenging cases.
Correlated dynamics of immune network and sl(3, R) symmetry algebra
Authors: Dutta Ruma , Stan Aurel 
Published: March 2024

Abstract
We observed the existence of periodic orbits in immune network under transitive solvable Lie algebra. In this article, we focus to develop condition of maximal Lie algebra for immune network model and use that condition to construct a vector field of symmetry to study nonlinear pathogen model. We used two methods to obtain analytical structure of solution, namely normal generator and differential invariant function. Numerical simulation of analytical structure exhibits correlated periodic pattern growth under spatiotemporal symmetry, which is similar to the linear dynamical simulation result. We used Lie algebraic method to understand correlation between growth pattern and symmetry of dynamical system. We employ idea of using one parameter point group of transformation of variables under which linear manifold is retained. In procedure, we present the method of deriving Lie point symmetries, the calculation of the first integral and the invariant solution for the ordinary differential equation (ODE). We show the connection between symmetries and differential invariant solutions of the ODE. The analytical structure of the solution exhibits periodic behavior around attractor in local domain, same behavior obtained through dynamical analysis.
The parametric Willmore flow
Authors: Palmurella Francesco , Rivière Tristan 
Published: March 2024

Abstract
We establish a minimal positive existence time of the parametric Willmore flow for any smooth initial data (smooth immersion of a closed oriented surface).
The minimal existence time is a function exclusively of geometric data which in particular are all well defined for general weak Lipschitz

W

2
,
2

W^{2,2}

immersions.
This fact opens in particular the possibility for defining the Willmore flow for weak Lipschitz

W

2
,
2

W^{2,2}

initial data.