bluuebunny/crossref_metadata_2025_split huggingface dataset:
Stepwise autonomous orbit determination of large LEO constellations by GNSS observations with partial inter-satellite ranging
Authors: Yang Yuanxi , Song Xiaoyong 
Published: February 2025

Abstract
Large constellations composed of a great amount of Low Earth Orbit (LEO) satellites are widely applied in satellite communication, remote sensing, augmented satellite navigation, environment monitoring, and so on. The satellite Orbit Determination (OD) is critical for the various function realization of the large constellation. Three different stepwise autonomous OD strategies for the large constellation of LEO satellites are proposed based on the spaceborne Global Navigation Satellite System (GNSS) observations and Inter-Satellite Link (ISL) range measurements, including the stepwise OD with both GNSS and ISL range measurements, stepwise OD with ISL range constraints, and an adaptive stepwise OD with both kinds of measurements. All of the three proposed stepwise autonomous OD approaches first estimate the initial orbit parameters for each satellite utilizing the spaceborne GNSS observations based on either a kinematic or dynamic OD strategy. The correction vector for the orbit parameters of each satellite is then individually calculated using the partial ISL range observations or ISL range constraints. The difference of the adaptive stepwise OD algorithm is that the covariance matrix of the predicted orbit parameters based on the dynamic model is modified by an adaptive factor. The LEO satellite parameters estimated with the stepwise OD strategies are equivalent to those obtained with the related integrated OD strategies. The main advantages of the proposed stepwise OD estimators are: (1) the orbit parameters of each satellite can be estimated in parallel, reducing the OD computational load for a large LEO constellation; (2) the spaceborne GNSS observations and the ILS range measurements in the three proposed approaches can be separately joined the OD procedures, making the parameter estimation flexible; (3) the adaptive stepwise OD mode with an adaptive factor acting on the covariance matrix of the predicted orbit parameters can effectively control the effects of the abnormal dynamic model information on the orbit parameter estimates. The simulation results for different OD strategies are analyzed. It is shown that the Root Mean Square Error (RMSE) of the estimated positions of the LEO satellites using the kinematic OD method is 60.527 cm, assuming the GNSS pseudorange noise of 30 cm. In contrast, the RMSE for the stepwise strategy, which considers only four adjacent ISL range measurements with an accuracy of 5 cm, is 18.287 cm. When the dynamic models for the LEO satellites are adopted, the RMSE of the estimated satellite positions using the stepwise orbit determination is further reduced to 11.340 cm. If the ISI ranging accuracy is better than 5 cm, the results remain nearly the same disregarding the ISL ranges are employed as observations or as constraints in the stepwise OD approaches. If the dynamic model information contains a few outliers, the adaptive stepwise OD can effectively control their effects on the orbit parameter estimates.
Human neuropilin-1 biomarker as predictor of subclinical cardiovascular affection in systemic lupus erythematosus patients
Authors: Soliman Samar Gaber , Yossef Samah Samy , Shahin Shaimaa R. , Serag Dina Mamdoh , Saif Dalia S. 
Published: February 2025

Abstract

Background
Cardiovascular disease (CVD) is recognized as the leading cause of death in patients with systemic lupus erythematosus (SLE). Although the pathways involved in accelerated cardiovascular disease are not yet fully understood, atherogenesis may be dramatically influenced by immune dysregulation in SLE. Evaluating the role of neuropilin-1 (NRP-1) biomarker in early detection of subclinical cardiovascular affection, and as an indicator of disease activity in SLE patients was the aim of this work.

Results
We evaluated serum human Neuropilin-1 (NRP-1) in SLE patients, and controls. We found that serum NRP-1 levels were significantly elevated in SLE patients, particularly in cases of high disease activity, and in those with subclinical cardiovascular affection. About 33% of SLE patients had increased carotid-intimal-medial thikness (CIMT), while 14% had abnormal brachial artery vasodilation response. Regarding SLE instances independent risk factors for subclinical cardiovascular affection included SLE disease activity, duration, body mass index (BMI), systolic and diastolic blood pressure, and serum NRP-1 level.

Conclusion
Human neuropilin-1 biomarker may represent a potential marker for early detection and prediction of subclinical cardiovascular affection in SLE patients at precise and sensitive cutoff point. In addition to its direct relationship to SLE disease activity; thus; it may serve as an advantageous serological indicator for the prediction of SLE disease activity.
Examining the influence of fiber orientation and cross-sectional geometry on the absorption capability of epoxy/carbon composite absorbents
Authors: Chen Yanxue , Zhong Yanxia , Yin Haixia , Wu Zhenghong , Wei Yuting 
Published: February 2025

Abstract
This study investigates the collapse behavior and energy absorption capabilities of epoxy/carbon composite absorbers using finite element analysis (FEA) in ABAQUS software. The analysis focuses on different geometrical cross-sections (circular, square, and octagonal) and various fiber orientations (0°, 30°, 45°, 60°, and 90°). The simulation results are validated against experimental data from previous studies to ensure accuracy. The findings reveal that nonzero fiber orientations induce twisting, altering stress distribution and reducing geometric stability. The highest energy absorption capacity was registered for the circular sections among the investigated geometries; the maximum collapse force for octagonal sections with a fiber orientation of 60° was increased by 35% and 49% with respect to the cylindrical and square sections, respectively. Also, in the case of an octagonal section, the maximum average absorbed energy occurs at a fiber orientation of 51.3°. The octagonal cross-section, especially for fiber orientation of 46.4°, demonstrates a better maximum peak load than the rest of the geometries. In this study, the critical effect of fiber orientation on the collapse behavior and energy absorption was underlined; for instance, a 0° fiber orientation behaves like a soft material, while 90° behaves like a brittle one, providing different modes of collapse. The results indicate how composite materials could be optimized for energy absorption applications.
Revisiting the barometric equation and the extent of a planetary atmosphere
Authors: Grimsditch Marcos , Karpov Victor G. 
Published: February 2025

Abstract
The barometric equation predicts the molecular concentration n(z) exponentially decaying with altitude z. Because the mean free path l = 1/nσ increases exponentially, at high altitudes z, the equation is no longer within the domain of applicability of the standard kinetic theory. Here, we predict the dependence n(z) ∝ z−2 for the case l ≫ L in uniform gravity and n(z) ∝ [ln(1+z/R0)]−2 when z ≫ R0 for a planet of radius R0. It corresponds to a non-stationary planetary atmosphere with hydrogen accretion. The accretion is accompanied by a release of gravitational potential energy that could be the elusive source driving the formation of stellar coronas. Other consequences include slowly decaying tails of planetary atmospheres and periodical hydrogen explosions of white dwarfs.&#xD;
Effects of oxygen level on thermal tolerance in Amazonian catfishes with bimodal respiration: physiological and behavioural changes
Authors: de Lima Mayara Cristina Moraes , Campos Derek Felipe , Kochhann Daiani , Val Adalberto Luis 
Published: February 2025

ABSTRACT
The degree of tolerance to adverse conditions ultimately shapes a species' vulnerability to environmental changes. Some studies have reported limited thermal tolerance due to hypoxia in fish employing aquatic respiration. However, there is a lack of information regarding the effects of hypoxia on thermal tolerance in fish exhibiting bimodal respiration. A set of Amazonian fish species has adaptations to breathe air when oxygen in water is not enough to fulfil demand. Additionally, loricariid species within this group possess stomach adaptations for air breathing. The Loricariidae family exhibits varying stomach types and observed morphological differences could influence their ability to obtain oxygen from the air. This ability may, in turn, have consequences for the thermal tolerance of these species. Our objective was to assess the effects of hypoxia on thermal tolerance, along with the physiological (whole-animal metabolic rates and mitochondrial respiration) and behavioural mechanisms involved, in two facultative air-breathing species: Pterygoplichthys pardalis and Ancistrus dolichopterus. These species showcase morphological distinctions in their stomachs, with the former having a higher capacity to obtain oxygen from the air. Thermal tolerance in P. pardalis remained unaffected by dissolved oxygen in the water when air access was available but decreased when access to the water surface was restricted, specifically in hypoxic conditions. Conversely, the thermal tolerance of A. dolichopterus decreased below the critical oxygen partial pressure (Pcrit), even with access to air, highlighting their limited ability to obtain oxygen through their adapted stomach. Our results underscore that air breathing enhances thermal tolerance, but this effect is prominent only in species with a higher capacity for air breathing.
Two Approaches to Cognitive Evaluation: Assessing the Strengths and Limitations of GPCOG and ACE-III
Authors: Mąka Magdalena , Sikora Dominik , Oleksy Piotr , Zając Adam , Zieliński Karol , Papież Łukasz , Góralczyk Ewa , Kamiński Jakub , Buczkowski Bartosz , Wochnik Dagmara 
Published: February 2025

Introduction : The aging population highlights age as a key risk factor for dementia and other cognitive disorders. Reliable diagnostic tools are crucial. This review examines the Addenbrooke’s Cognitive Examination-III (ACE-III) and the General Practitioner Assessment of Cognition (GPCOG), focusing on their sensitivity, specificity, and utility in diverse healthcare contexts.
Purpose of Research: This analysis explores the clinical utility of the Addenbrooke’s Cognitive Examination-III (ACE-III) and the General Practitioner Assessment of Cognition (GPCOG) for diagnosing cognitive disorders, including dementia, emphasizing their use in primary care and specialized settings.
Materials and Methods : A review of 37 peer-reviewed studies, including clinical trials and validation research, was conducted using databases like PubMed and Google Scholar. Keywords included "GPCOG," "ACE-III," and "cognitive screening."
Results : ACE-III shows high diagnostic accuracy, with sensitivity and specificity exceeding 93% and 96%. It excels in assessing complex dementia but is time-intensive and requires trained personnel, limiting its use in primary care. Conversely, GPCOG is a quick, user-friendly tool suited for primary care but lacks the depth for detailed diagnostics.
Conclusions : ACE-III is optimal for detailed evaluations in specialized settings, while GPCOG excels in rapid primary care screening. Combined, they enhance early detection and management of cognitive disorders.
Pain Associated with Endometriosis. A Review of Quality of Life. Psychological Aspects, Career Development, Sexual Health, and Intimate Partner Relationships
Authors: Zubiak Marlena , Byrska Martyna , Barska-Kobylińska Hanna , Langner Sara , Malaka Ewa Katarzyna , Janura Marta , Elias Jagoda , Biesiada Wiktor , Szydłowska Sara , Błaszków Krzysztof 
Published: February 2025

Introduction: Endometriosis is a chronic estrogen-dependent inflammatory disease characterized by the presence of tissue resembling the endometrium outside the uterine cavity. It affects approximately 10% of women of reproductive age. The main symptoms include severe pain, reduced fertility, and sexual dysfunction. Treatment includes pharmacotherapy and surgical interventions, depending on the severity of symptoms, the location of lesions, and their extent.
Study Objective: The aim of the study was to assess quality of life, as well as the impact of dyspareunia and other endometriosis-related symptoms on sexual health and intimate partner relationships.
Materials and Methods: Over 60 scientific articles addressing this issue were analyzed. The studies were retrieved from the PubMed platform, spanning the years 2004 to 2024.
Conclusions: The symptoms of endometriosis, along with limited therapeutic options, significantly affect overall quality of life, sexual health, and partner relationships. Based on the available literature and current knowledge, it can be concluded that it is crucial to provide not only medical treatment but also sexological and psychological support.
Streaming Submodular Maximization Under Matroid Constraints
Authors: Feldman Moran , Liu Paul , Norouzi-Fard Ashkan , Svensson Ola , Zenklusen Rico 
Published: February 2025

Recent progress in (semi-)streaming algorithms for monotone submodular function maximization has led to tight results for a simple cardinality constraint. However, current techniques fail to give a similar understanding for natural generalizations, including matroid constraints. This paper aims at closing this gap. For a single matroid of rank k (i.e., any solution has cardinality at most k), our main results are a single-pass streaming algorithm that uses [Formula: see text] memory and achieves an approximation guarantee of 0.3178 and a multipass streaming algorithm that uses [Formula: see text] memory and achieves an approximation guarantee of [Formula: see text] by taking a constant (depending on ε) number of passes over the stream. This improves on the previously best approximation guarantees of 1/4 and 1/2 for single-pass and multipass streaming algorithms, respectively. In fact, our multipass streaming algorithm is tight in that any algorithm with a better guarantee than 1/2 must make several passes through the stream and any algorithm that beats our guarantee of [Formula: see text] must make linearly many passes (as well as an exponential number of value oracle queries). Moreover, we show how the approach that we use for multipass streaming can be further strengthened if the elements of the stream arrive in uniformly random order, implying an improved result for p-matchoid constraints. Funding: This research was supported by the Israel Science Foundation [Grants 1357/16 and 459/20] and NCCR—on the Move [Grants 200021_184622 and 200021_184656]. This project also received funding from the European Research Council [Grant 817750] under the European Union’s Horizon 2020 Research and Innovation Programme.
Archivos 2024: Fomentando la conciencia multidimensional en salud laboral
Authors: Vega Álvarez Francisco , Agudelo-Suárez Andrés A. , Brocal Francisco , Delclós Jordi , García González Guillermo , García Vega , Ramada José María , Serra Laura , Vargas-Prada Sergio , Utzet Mireia , Serra Consol 
Published: February 2025

La evolución positiva de citas recibidas y otros reconocimientos como la obtención del sello de FECYT o el ascenso a Q3 en SJR, nos permiten afirmar que Archivos de Prevención de Riesgos Laborales se está consolidando como un medio fundamental para la difusión de conocimientos y avances en el campo de la salud laboral, especialmente en el espacio hispanohablante. Su enfoque integral, su adaptación a los retos emergentes y su rigor científico hacen que sea un referente para quienes buscan impulsar la mejora continua de la seguridad y la salud en el trabajo.
The health and wellbeing of NHS staff in a community setting
Authors: Wallbank Sonya 
Published: February 2025

Background/Aims Research relating to the health and wellbeing of NHS staff since the onset of the COVID-19 pandemic has generally focused on those working in acute settings. This study aimed to assess levels of burnout, secondary traumatic stress and compassion satisfaction among staff working for an NHS community care organisation. Methods A retrospective, cross-sectional questionnaire was used to assess burnout, secondary traumatic stress and compassion satisfaction (pleasure from delivering a caring role) among NHS staff working for one large community care service. Participants included physicians, nurses and allied health professionals. The Professional Quality of Life scale was used to collect data, with items scored on a 5-point Likert scale. Data were analysed using analysis of variance (ANOVA), producing F scores for each item. Significance was set at P<0.05. Results Mean scores for each domain indicated moderate levels of burnout, secondary traumatic stress and compassion satisfaction across sample. All F scores produced using ANOVA were significant at P<0.05. In the burnout and secondary traumatic stress domains, the items with the highest F scores related to feeling worn out, overwhelmed and deeply affected by the trauma experienced by patients whom respondents had helped care for. In the compassion satisfaction domain, the highest F scores related to feelings of satisfaction and pride in one's work. Conclusions Healthcare leaders must prioritise time for community staff to cope with and recover from stressful experiences at work. Building compassion satisfaction should also be an area of focus to reduce the risk of stress, burnout and attrition in community care.
THE IMPACT OF ACHILLES TENDON RUPTURE ON THE STRUCTURE AND FUNCTION OF THE ACHILLES TENDON AND PLANTARFLEXORS AFTER NON-SURGICAL MANAGEMENT: A CROSS-SECTIONAL STUDY
Authors: Briggs-Price Samuel , Yates Tom , Mangwani Jitendra , Bhatia Maneesh , Jones Annette , Silbernagel Karin Gravare , Herbert-Losier Kim , de Vos Robert-Jan , Millar Neal L , Vicenzino Bill , O'Neill Seth 
Published: February 2025

IntroductionAcute Achilles Tendon Ruptures (ATR) cause lasting muscular deficits and impair function and quality of life. This study aimed to understand recovery post rupture by examining tendon structure using ultrasound tissue characterisation (UTC), isometric plantarflexor strength, physical activity and patient reported outcomes (PROM).MethodsCross-sectional study design consisting of 90 participants. Data were collected from 15 participants at six different rehabilitation timepoints (0, 8, 10 weeks, 4, 6, 12 months). Participants were recruited from a National Health Service clinic using non-surgical management.FindingsParticipants mean (SD) age 48 years (16), 91% male, body mass index 29kg/m2, 54% white British with a median of 1 comorbidity. Primary mechanism of injury was sport (71.1%). Deep vein thrombosis rate was 9.3%.Based on UTC, ruptured tendon cross-sectional area (CSA) was 287.55 mm2 at 10 weeks, 203.62mm2 at 12 months. Disorganised fibrillar structure was 32% lower at 12 months than 10 weeks. Disorganised fibre percentage was consistent at each assessment point (10 weeks:32%, 12 months:30%).Isometric plantarflexor strength on the ruptured limb at 12 months was 61.3kg (20.8) or 0.7x body weight (BW) whilst the non-ruptured limb was 93.3kg (29.5) or 1.1x BW. Daily steps increased from 3720 (1889.8) at week 0 to 9048.4 (2750.1) at 12 months.PROMs at 12 months; ATRS 75.1 (16.5), EQ-5D index .91, EQ-5D VAS 75 (23), SF-36 Physical Functioning 84.3 (9.2), Tampa Scale for Kinesiophobia 34.7 (4.8).ConclusionThere is substantial remodelling of the tendon during the initial 12 months post ATR, with tendon CSA differing 29% across assessment points. Proportion of disorganised collagen remains consistent from 10 weeks to 12 months post ATR, whilst CSA reduces. Individuals presenting with ATR managed non-surgically have a 34% or 0.4xBW isometric strength deficit at 12 months and still present with fear of movement and reduced function based on PROMs.
DOES THE MEASURE OF ACHILLES TENDON RESTING ANGLE CORRELATE WITH OUTCOME AFTER FUNCTIONAL BRACING AND REHABILITATION FOR ACHILLES RUPTURE?
Authors: Plant Caroline , Skidmore John , Pritchard Andrew , Dhukaram Vivek 
Published: February 2025

BackgroundAcute Achilles tendon ruptures can be a devastating injury with a prolonged recovery period (1). Following the UKSTAR trial, Achilles tendon ruptures are predominately treated with a functional rehabilitation bracing program (2). The aim of treatment is to avoid lengthening of the tendon, and hence the resultant loss of function. The Achilles tendon resting angle (ARTA) provides a simple assessment of tendon length that can be performed in the clinical setting (3). This study assesses the Achilles tendon resting angle over a 52-week period and the correlation with functional outcome.MethodsA total of 182 consecutive patients with an acute Achilles tendon rupture were treated with a 10-week functional rehabilitation regime. The relative Achilles tendon resting angle was recorded as the difference between the limbs at the time of injury, then once treatment commenced at 4-, 11-, 26- and 52-weeks post injury. Patients with a previous Achilles rupture of the contralateral leg were excluded. The functional outcome was assessed using the Achilles tendon rupture score at 26- and 52-weeks post injury.ResultsThe relative Achilles tendon resting angle improved by 5 degrees with functional bracing and plateaued after 11 weeks post injury. The functional outcome continued to improve to 52 weeks post injury with a mean ARTS of 77.9 (15.1). No correlation was detected between the ARTA and ARTS at either 26- or 52- weeks. Only one patient sustained a re-rupture.ConclusionFunctional bracing reduces the extent of tendon lengthening and improves the functional outcomes of patients up to a year post-injury. The relative ARTA as part of clinical assessment however, fails to provide an indication of the long-term functional outcome of these patients.
MINIMALLY INVASIVE CHEVRON AKIN FOR HALLUX VALGUS SURGERY: A PROSPECTIVE OBSERVATIONAL STUDY WITH MEAN 6.7-YEAR FOLLOW-UP
Authors: Townsend Oliver , Hill Niall , Reaney Adam , Koç Togay , Lewis Thomas , Gordon David 
Published: February 2025

IntroductionMinimally invasive (percutaneous) distal first metatarsal osteotomy with internal fixation is an established technique for hallux valgus deformity correction. Published data is limited to 2–3 years follow-up. This study aimed to assess patients undergoing MICA (Minimally Invasive Chevron and Akin) with minimum 5-year follow up, to evaluate the longer-term results of this procedure using validated patient reported outcome measures (PROMs).MethodsFive-year PROM data was prospectively collected from 117 patients who underwent 169 primary MICA osteotomies between July 2014 and April 2018, performed by a single surgeon. Primary clinical outcome measures included visual analogue scale for pain (VAS-pain), Manchester-Oxford Foot Questionnaire (MOXFQ) and EuroQol-5 Dimensions Index (EQ-5D). Data were collected preoperatively, at 2 years and after a minimum of 5 years. Statistical significance was set at p< 0.05.Results169 MICA were performed on 117 patients (112 females, 5 males). Mean follow-up was 6.7 years (standard deviation (SD) 0.96 years). All patients completed minimum 5-year follow-up scores. The MOXFQ scores (mean ± SD) for all 169 feet improved for all domains: from 44.5 ± 22.1 preoperatively to 10.3 ± 17.0 post-operatively for Pain (p<0.001), from 39.2 ± 24.5 to 9.3 ± 17.9 for Walking and Standing (p<0.001) and from 48.2 ± 22.8 to 8.7 ± 17.6 for Social Interaction (p<0.001). VAS-pain improved from 30.8 ± 22.7 to 12.9 ± 21. (p<0.001). EQ-5D Index improved from 0.74 ± 0.14 to 0.90 ± 0.12 (p<0.001).ConclusionThis is the largest study at this time point presenting PROM data following minimally invasive distal first metatarsal osteotomy. It is also the longest in follow up for this technique. This study demonstrates significant improvement in PROMs at the mid-term and MICA can be considered as an effective and long-lasting option for the management of hallux valgus deformity.