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Article
Public Health and Healthcare
Health Policy and Services

Leonardo Nava-Velazquez

,

Angélica Saraí Jiménez-Osorio

,

Margarita Tetlalmatzi-Montiel

,

Diego Estrada-Luna

,

Julieta Ángel-García

,

Geu Mendoza-Catalán

,

Erika Elizabeth Rodriguez-Torres

Abstract: This study analyzed environmental noise in neonatal hospital units, including low- and high-risk nurseries and neonatal intensive care units (NICUs). Continuous 24-hour measurements over ten days showed that average sound levels significantly exceeded international recommendations, with peaks up to 92.7 dB (p < 0.05). Hourly LAeq values often reached or surpassed 65 dB, with more than 20% of daily recordings above this limit and, in some cases, over 50%. Heatmaps revealed recurrent patterns: high-risk nurseries showed peaks during late morning and afternoon, low-risk nurseries at night, and NICUs maintained elevated levels throughout the day. Main noise sources were alarms, medical equipment, and staff or visitor activity. The Premature Infant Pain Profile (PIPP) suggested associations between noise and neonatal discomfort. Overall, up to 60% of noise could be reduced through architectural, technological, and organizational measures, underscoring the need for hospital policies that protect neonatal neurosensory health. These findings provide evidence-based guidance for designing quieter neonatal care environments.
Article
Physical Sciences
Astronomy and Astrophysics

Farzad Lali

Abstract: Future–Mass Projection (FMP) gravity is a non–local extension of general relativity in which the metric at a spacetime point couples to a weighted integral over the future stress–energy tensor along a closed time path. In earlier work, bilocal kernels in Fourier space of the form Ξd(k) = ε/(1 + k2/k2 0) were shown to lead, in the quasi–Newtonian limit, to configuration–space boost factors D(R)−1 ∝ K0(k0R) multiplying the baryonic acceleration, where K0 is a modified Bessel function of the second kind. This paper extends that framework by introducing an entropic response of the bilocal kernel to fluctuations in the baryonic surface density and tests the resulting effective boost function against the rotation curves of the Milky Way (MW) and M31 (Andromeda). Instead of treating each galaxy separately, we construct a phenomenological entropic boost D(x) as a function of scaled radius x = R/Rd, where Rd is the exponential disk scale length. The parametrisation D(x) = 1 + ε1 h 1 − e−(x/xs1)2i + ε2 h 1 − e−(x/xs2)2i is understood as an effective representation of a superposition of K0–type modes. We fit the global parameters (xs1, xs2, ε1, ε2) jointly toMWand M31 using fixed bulge+disk mass models from Sofue, while keeping track of the dominant baryonic systematics (thin– disk geometry and gas disks). For the stellar bulge+disk alone we find a joint best fit at xs1 = 0.50, xs2 = 3.0, ε1 = −0.231, ε2 = 1.50. This corresponds to a mild suppression of the effective gravity in the inner disk, D(0.5) ≃ 0.90, and an outer–disk boost asymptoting to D(x ≳ 5) ≃ 2.18 (velocity enhancement √ D ∼ 1.48). Applied to the Milky Way rotation curve of Sofue (2020) in the range 2–60 kpc and to a refined M31 curve in the range 2–40 kpc, the model reproduces the overall amplitude and radial trend with fractional root–mean–square deviations of ∼ 13% (MW) and ∼ 12% (M31). However, the formal reduced chi–squares are large (χ2 ν ≈ 25 for MW and χ2 ν ≈ 5 for M31), indicating that the combination of our simplified baryonic modelling and overly rigid kernel is not yet statistically acceptable. We estimate that including a gas disk with massMg ∼ 1010M⊙ and scale length Rg ∼ 7 kpc would raise the outer baryonic rotation speed by ∼ 5–8kms−1 in M31 beyond R ≳ 20 kpc, and yield a similar effect for the Milky Way, reducing the required outer boost amplitude ε2 by roughly 10–15%. Conversely, the spherical approximation for the stellar disk is known to overestimate the circular speed by ∼ 10–15% near R ≈ 2Rd compared to a thin exponential disk. These two systematics partially compensate each other but do not remove the need for a non–trivial boost. Within these caveats, a single, smooth boost in scaled radius is sufficient to bring MW and M31 rotation curves to within ∼ 10–15% in circular velocity using baryons only, suggesting that entropic FMP gravity is a promising but not yet competitive alternative to ΛCDM halo models on galaxy scales.
Case Report
Medicine and Pharmacology
Psychiatry and Mental Health

Ngo Cheung

Abstract: Adults with attention-deficit/hyperactivity disorder often continue to battle mental "fog," emotional lability and low drive even after guideline treatments have been optimised. Mounting evidence from mood-disorder research indicates that shifting glutamatergic traffic toward AMPA-receptor throughput can trigger rapid plastic changes, yet this principle has seldom been explored in ADHD.A 28-year-old woman who remained inattentive and anxious on atomoxetine was switched, in routine outpatient practice, to a low-dose extended-release methylphenidate formulation (18 mg) augmented with piracetam 1 200 mg daily. Within days she reported markedly sharper concentration, steadier mood and a new capacity to sustain purposeful activity without the late-day "flattening" she had experienced on stimulants alone. When piracetam was paused for three days the improvements evaporated, only to return on re-initiation, creating a clear temporal association.The observation supports the idea that a safe, inexpensive AMPA modulator can amplify the modest glutamate rise produced by methylphenidate and translate it into meaningful clinical gains. Although limited to a single case, the result invites systematic study of piracetam as an adjunct for adults whose ADHD symptoms have proven only partially responsive to standard pharmacotherapy.
Article
Computer Science and Mathematics
Algebra and Number Theory

Li An-Ping

Abstract: Lately it is unfortunately found that there was a mistake of the sign of term \( (c-v)^2/2\sigma \) in Lemma 2.1 of the prior version, which prevented the proof of Theorem 1.1 from being completed as scheduled, here we will give an alternative argument.
Article
Medicine and Pharmacology
Internal Medicine

Kuat Oshakbayev

,

Aigul Durmanova

,

Gani Kuttymuratov

,

Nurzhan Bikhanov

,

Altay Nabiyev

,

Timur Suleimenov

,

Alisher Idrisov

,

Tomiris Shakhmarova

,

Zhanel Mirmanova

,

Saule Rakhimova

+2 authors

Abstract: Background: The comparative effects of pharmacological treatment, bariatric surgery, and diet on insulin resistance (IR) remain unclear. Aim: To study the comparative effects of the methods on IR: pharmacologic, bariatric surgery, and very-low-calorie diet (VLCD) in patients with type 2 diabetes mellitus (T2DM) and hypertension. Methods. Design: a 90-day prospective, multicenter, comparative clinical trial including 130 adult patients divided in three groups: Drug, Surgical, and VLCD groups. Endpoints: HOMA-IR; weight loss; HbA1c, systolic/diastolic blood pressure (SBP/DBP). Results. At 90 days, weight lost in Surgery (-19.8%) and VLCD groups (-17.4%) (P< 0.0001), while in Drug group the loss was unsignificant (-6.5%; P=0.06). SBP/DBP in Drug group decreased by -9.5% (P=0.0002) and -4.1% (P=0.09), respectively. SBP/DBP in: Surgical group decreased by -13.6% and -10.6%, respectively (P< 0.001); VLCD group -23.3% and 21.3%, respectively (P< 0.0001). HOMA-IR in Drug, Surgery and VLCD groups decreased by -42.2% (P=0.004), -87.6% (P< 0.0001), and -88.7% (P< 0.0001), respectively. In Drug group HOMA-IR did not reach normal level. Correlation-regression-analysis revealed a direct correlation between weight-loss and a decrease in HOMA-IR (r=0.526; F=33.2, P< 0.0001). HOMA-IR decreases by 65% if weight decreases by 10%; if weight decreases by 25%, then HOMA-IR decreases by 83%. Conclusions. HOMA-IR was associated with weight loss: the greater the weight loss, the lower HOMA-IR. Weight loss leads to reduce the need for antidiabetic/antihypertensive drugs in the patients.
Article
Medicine and Pharmacology
Hematology

Selda Kahraman

,

Evren Ozdemir

Abstract: ABSTRACT Aim. We aimed to compare patients receiving cyclophosphamide treatment post-transplant with those receiving standard graft versus host disease (GVHD) prophylaxis in terms of GVHD development, disease relapse, overall survival, transplant-related mortality and infection development. Methods: The data of 78 patients who underwent allogeneic stem cell transplantation (AHSCT)at Medicana Izmir Hospital between January 2022 and June 2024 were retrospectively evaluated. Results: Of the patients, 36 (46.2%) were female, and 42 (53.8%) were male. Myeloablative related AHSCT was performed on 38 patients (48.7%), myeloablative unrelated on 26 patients (33.3%), and haploidentical on 14 patients (17.9%). Acute GVHD developed in 42 patients (53.8%),Regarding the clinical and laboratory variables affecting acute GVHD, only ferritin (p=0.016) was found to be significantly lower in the group with acute GVHD, and acute GVHD was significantly less observed in the group that received post-transplant cyclophosphamide (p. 0.032).In 15 patients (19.2%), chronic GVHD developed following acute GVHD. It was found that chronic GVHD developed more frequently in those who did not receive post-transplant cyclophosphamide (p=0.0001), in sibling transplants (p=0.037), in those without febrile neutropenia (p=0.021), and in those with high CMV-DNA levels (p=0.040). The median OS (months) was determined as 79.16 months. Median OS (months) was higher in patients with good AML cytogenetic risk group (p< 0.001) and in patients who underwent transplantation in first remission (p=0.021) has been found. In conclusion; Cyclophosphamide administration after allogeneic bone marrow transplantation can significantly reduce the development of acute and chronic GVHD.
Article
Computer Science and Mathematics
Geometry and Topology

Thomas Adler

,

Marco Grassia

,

Ziheng Liao

,

Giuseppe Mangioni

,

Carlo V. Cannistraci

Abstract: Complex networks model the structure and function of critical technological, biological, and communication systems. Network dismantling, the targeted removal of nodes to fragment a network, is essential for analyzing and improving system robustness. Existing dismantling methods suffer from key limitations: they depend on global structural knowledge, exhibit slow running times on large networks, and overlook the network’s latent geometry, a key feature known to govern the dynamics of complex systems. Motivated by these findings, we introduce Latent Geometry-Driven Network Automata (LGD-NA), a novel framework that leverages local network automata rules to approximate effective link distances between interacting nodes. LGD-NA is able to identify critical nodes and capture latent manifold information of a network for effective and efficient dismantling. We show that this latent geometry-driven approach outperforms all existing dismantling algorithms, including spectral Laplacian-based methods and machine learning ones such as graph neural networks and . We also find that a simple common-neighbor-based network automata rule achieves near state-of-the-art performance, highlighting the effectiveness of minimal local information for dismantling. LGD-NA is extensively validated on the largest and most diverse collection of real-world networks to date (1,475 real-world networks across 32 complex systems domains) and scales efficiently to large networks via GPU acceleration. Finally, we leverage the explainability of our common-neighbor approach to engineer network robustness, substantially increasing the resilience of real-world networks. We validate LGD-NA's practical utility on domain-specific functional metrics, spanning neuronal firing rates in the Drosophila Connectome, transport efficiency in flight maps, outbreak sizes in contact networks, and communication pathways in terrorist cells. Our results confirm latent geometry as a fundamental principle for understanding the robustness of real-world systems, adding dismantling to the growing set of processes that network geometry can explain.
Article
Environmental and Earth Sciences
Sustainable Science and Technology

Liu Hao

,

Zhang Bing

Abstract: Promoting the clean energy transition is crucial for environmental sustainability and public health. Utilizing data from the China Health and Nutrition Survey (CHNS) spanning 2006 to 2015, this study employs a Difference-in-Differences (DID) model, treating China's West-East Gas Pipeline Project (WEGT) as a quasi-natural experiment to evaluate the causal impact of natural gas infrastructure expansion on resident health. The empirical results indicate that the WEGT significantly improved public health, with more pronounced effects observed among urban residents and the elderly. Mechanism analysis reveals that the infrastructure improves health primarily by optimizing household energy structures and reducing industrial pollution emissions. Furthermore, the "Coal-to-Gas" policy synergistically enhances these health benefits. Welfare analysis demonstrates that the project reduced medical expenditures and increased local employment. These findings provide empirical evidence for deepening supply-side structural reforms in energy and support the realization of the United Nations Sustainable Development Goals (SDGs) related to good health (SDG 3) and affordable clean energy (SDG 7).
Review
Medicine and Pharmacology
Orthopedics and Sports Medicine

Sabine D. Brookman-May

Abstract: Background: Acute physical exercise can influence cognitive performance and neuro-biological processes, but evidence spans diverse modalities, intensities, and adult pop-ulations. Objectives: To map the breadth of acute exercise–cognition research, characterize cog-nitive and biological outcomes, and identify consistent patterns and gaps. Eligibility Criteria: Studies of adults (≥18 years) involving a single exercise session or short microcycle (≤7 days) with pre–post assessment of cognition and/or neurobiological markers across any exercise modality (aerobic, resistance, high-intensity interval train-ing/HIIT, combined, vibration, mind–body) were included. Sources of Evidence: PubMed and CENTRAL were systematically searched, yielding 102 studies. Charting Methods: Data were extracted using a structured framework capturing exercise modality, dose, cognitive domains, biomarkers, neuroimaging outcomes, population characteristics, and study design features. Results: Most studies examined young adults (53%) or older adults (32%). Aerobic exercise predominated (62%), followed by resistance (18%) and combined modalities (12%). Moderate-to-vigorous aerobic exercise consistently improved executive function, pro-cessing speed, and working memory. Resistance exercise also enhanced executive function in several trials. Neurobiological correlates included increases in Brain-Derived Neurotrophic Factor (BDNF), lactate, catecholamines, and prefrontal activation, though variability in sampling limited mechanistic conclusions. Conclusions: Acute exercise reliably enhances executive function and processing speed across modalities. Standardized exercise protocols, biomarker timing, and cognitive as-sessments are needed to strengthen mechanistic synthesis.
Article
Engineering
Electrical and Electronic Engineering

Mitsui Salgado-Saito

,

Betsabe De la Barreda-Bautista

,

Victor Sandoval-Curmina

,

Jose Hernandez-Benitez

,

Oscar Sanchez-Siordia

Abstract: Since 2014, the Mexican Caribbean has faced an ecological and socio-economic crisis due to massive coastal landings of pelagic sargassum. This study presents a comprehensive methodology for sargassum detection using Machine Learning (ML) models applied to imagery from a coastal video monitoring station (EVMC). Three machine learning techniques were implemented to classify sargassum on sand and water, Support Vector Machines (SVM), Random Forest (RF), and a Multi-Layer Perceptron (MLP) Artificial Neural Network. The performance of these ground-based models was then compared against sargassum detections from Sentinel-2 satellite data using the Floating Algae Index (FAI) and the Normalized Difference Vegetation Index (NDVI). The results demonstrated high efficacy, with the MLP model proving most effective for detecting sargassum on sand with a F1-score > 0.86, whilst the Random Forest model performing best in water with a F1-score > 0.75. A significant positive correlation was found between the video-based detections and indices derived from satellite data, with NDVI showing a consistently stronger correlation in both environments. This study validates coastal video monitoring as a reliable tool for local sargassum quantification and suggests that fusing this high-resolution ground data with wide-area satellite imagery offers a promising path toward a more accurate and comprehensive sargassum monitoring system.
Article
Medicine and Pharmacology
Oncology and Oncogenics

Ichrak Ben Abdallah

,

Severine Guiu

,

Xavier Quantin

,

William Jacot

,

Philine Witowski

Abstract: Introduction The addition of immunotherapy to neoadjuvant treatment for early triple-negative breast cancer (TNBC) has been adopted in clinical practice in France since March 2022 with little real-world data published on the topic. The aim of this study was to evaluate real world data on treatment feasibility, efficacy and related toxicities, with a specific focus on immune-related adverse events (irAEs). Methods We conducted a retrospective analysis of patients who completed at least the neoadjuvant sequence of pembrolizumab combined with chemotherapy for early-stage TNBC at Montpellier Cancer Institute from April 2022 to July 2024. Adverse events were graded according to the Common Terminology Criteria for Adverse Events (CTCAE) v5.0. The pathological complete response (pCR) was defined as the absence of residual invasive disease in the breast and axillary lymph nodes (ypT0/Tis ypN0) Results We reviewed data from 92 patient records. The median age at diagnosis was 50 years (range: 27–76). The history of autoimmune disease was noted in 3.2%. Grade 3–4 irAEs were observed in 20% of patients and included hepatitis (8.6%), colitis (3.3%), skin toxicity (2.1%), myocarditis (2%), arthralgia (1%), autoimmune hemolytic anemia (1%), hypothyroidism (1%), and adrenal insufficiency (1%). No treatment-related deaths were reported. Immunotherapy was discontinued due to irAEs in 1/3 of patients of the study population. pCR rate was 61,1%, with no significant association between the number of neoadjuvant pembrolizumab cycles and pCR rate (p=0.7). Patients experiencing grade 3–4 irAEs had a pCR rate of 80%, compared to 56.7% in those without such toxicities (p=0.079). Initial positivity of antinuclear antibodies (ANA) was not associated with an increased incidence of irAEs. Conclusion The immune-related adverse events and efficacy data observed in our cohort were broadly comparable to those reported in the KEYNOTE-522 trial with no treatment related deaths. Patients with grade 3–4 irAEs tended to have higher pCR rates.
Article
Public Health and Healthcare
Physical Therapy, Sports Therapy and Rehabilitation

Priscila Marconcin

,

Joana Serpa

,

José Mira

,

Ana Lúcia Silva

,

Estela São Martinho

,

Vânia Loureiro

,

Margarida Gomes

,

Petronela Hăisan

,

Nuno Casanova

,

Vanessa Santos

Abstract: Background/Objectives: Falls are a leading cause of morbidity and mortality in older adults, even among those who are physically active. This study examined the associations of skeletal muscle mass, muscle strength, and muscle power with fall risk in community-dwelling, physically active older adults. Methods: A cross-sectional analysis was conducted with 280 participants (71.9 ± 5.3 years; 75% women) enrolled in the Stay Up–Falls Prevention Project. Assessments included skeletal muscle mass (anthropometric prediction equation), handgrip strength, lower-limb strength and power (Five Times Sit-to-Stand test, 5xSTS), and fall history over the past 12 months. Muscle power was calculated from 5xSTS performance using the equation proposed by Alcazar and colleagues. Logistic regression models and receiver operating characteristic (ROC) curve analyses were performed. Results: Overall, 26.4% of participants reported at least one fall in the previous year, with a higher prevalence among women (28.9%) than men (18.8%). Fallers showed significantly lower handgrip strength (23.1 vs. 25.4 kg, p = 0.022) and poorer lower-limb strength (9.2 vs. 8.7 s, p = 0.007) compared with non-fallers. However, no significant differences were found for skeletal muscle mass or sit-to-stand–derived power. In multivariable models adjusted for age, sex, body mass index, comorbidities, and medications, lower-limb strength remained the only independent predictor of falls (OR = 1.78, 95% CI: 1.11–2.85, p = 0.016). ROC analysis confirmed fair discriminative capacity for 5xSTS performance (AUC = 0.616, p = 0.003), with an optimal cut-off of 8.62 s (sensitivity = 78.4%, specificity = 33.0%). Handgrip strength, muscle mass, and power did not show independent predictive value. Conclusions: These findings indicate that the 5xSTS test provides a simple, cost-effective, and clinically relevant measure for fall-risk screening in active older adults. Clinicians should consider the 5xSTS as a sensitive first-line screening tool, ideally combined with complementary assessments (e.g., balance, gait, cognition) to improve risk stratification and guide preventive interventions in ageing populations.
Article
Medicine and Pharmacology
Medicine and Pharmacology

Huimin Cui

,

Shang Gao

,

Jiahui Shi

,

Yinghui Pan

,

Pengzhi Hong

,

Jiannong Lu

,

Chunxia Zhou

Abstract:

This study extracted polysaccharides from Adansonia Suarezensis fruit pulp using various methods: hot water (ASP-HW), acid (ASP-AC), alkaline (ASP-AL), ultrasound-assisted hot water (ASP-HWU), ultrasound-assisted acid (ASP-ACU), and ultrasound-assisted alkaline (ASP-ALU). A comparison was conducted on the yield, chemical composition, structural properties, and biological activities. The findings indicated that the extraction solvent significantly influenced various essential properties of the ASPs, such as yield, monosaccharide composition, molecular weight, particle size, and thermal stability. The polysaccharides consisted of galacturonic acid, galactose, xylose, and arabinose.ASP-AL and ASP-ALU exhibited smaller molecular weight and particle size, with molecular weights of 19,813 Da and 19,600 Da, and particle sizes of 146.67 ± 22.46 nm and 140.97 ± 20.38 nm, respectively. The ASPs displayed characteristic polysaccharide structures, with ASP-AC, ASP-ACU, ASP-AL, and ASP-ALU possessing a triple-helix conformation. Bioactivity assays demonstrated that ASP-AL and ASP-ALU had enhanced DPPH radical scavenging activity (IC50 116.67 ± 0.58 μg/mL and 113.67 ± 2.31 μg/mL, respectively), ABTS radical scavenging activity (IC50 79.67 ± 0.58 μg/mL and 79.33 ± 1.15 μg/mL, respectively), and α-glucosidase inhibitory activity (IC50 0.146 ± 0.01 mg/mL and 0.206 ± 0.01 mg/mL, respectively).These findings indicate that ASPs possess significant bioactivity, supporting their potential use in pharmaceuticals and functional foods.

Review
Social Sciences
Library and Information Sciences

Niels Taubert

Abstract: This paper reviews research literature on Diamond Open Access (DOA) journals – sometimes also called Platinum Open Access – that was produced after this journal segment started to become a priority in European research policy around 2020. It con-textualizes the current science policy debate, critically examines different understand-ings of DOA, and reviews studies on the role of such journals in scholarly communica-tion. Most existing research consists of quantitative studies focusing on aspects such as the number of DOA journals, their publication output, the diversity of the landscape in terms of subject areas, languages, publishing entities, indexing in major databases, awareness and perception among scholars, cost analyses, as well as insights into the internal operations of DOA journals. The review shows that research on DOA journals is partly influenced by the science policy discourse in at least two ways: first, through the normativity inherent in that discourse, and second, through the temporality of policy-driven research of practical relevance, which leaves important aspects of the phenomenon understudied. Moreover, research on the DOA journal landscape has implications beyond understanding this particular journal segment, as it also challenges established views of the global system of scholarly communication.
Article
Physical Sciences
Particle and Field Physics

Andrew Michael Brilliant

Abstract: Peer review of empirical patterns in high-precision, low-dimensionality param- eter spaces relies on implicit evaluation standards. When N = 3 parameters at 2% precision permit thousands of statistically significant formulas, reviewers must distinguish structure from coincidence, but the criteria for doing so remain unar- ticulated. We found no published record of community debate establishing explicit standards, despite decades of informal application. This paper proposes one such articulation: seven criteria emphasizing tempo- ral convergence through timestamped predictions. We offer specific thresholds not because we believe them correct, but because explicit proposals can be calibrated while implicit standards cannot. The need for explicit standards is timely. Lattice QCD has only recently achieved the precision necessary for discriminatory tests of quark mass relations. Historical precedents from lepton phenomenology (Koide, Gell-Mann–Okubo) provide limited guidance: leptons offer ∼35,000× greater discriminatory power than light quarks, in- volve no RG running, and constitute a fundamentally different measurement regime. The historical record is further compromised by survivorship bias: patterns that di- verged are largely unrecorded. Historical cases motivate the problem by illustrating why implicit evaluation proved adequate for leptons but may prove inadequate for quarks. They cannot validate the proposed solution. Validation is prospective by design: starting from this publication, patterns evaluated under this framework will be tracked publicly. The framework succeeds if it proves predictively useful; it fails if it requires constant post-hoc adjustment, judged by its own temporal convergence criterion. If this proposal provokes disagreement that leads to better criteria, it will have served its purpose. If it is ignored, the current system of implicit evaluation contin- ues unchanged. We consider both engagement and refinement to be success.
Technical Note
Environmental and Earth Sciences
Remote Sensing

Tom Grydeland

,

Yngvar Larsen

Abstract: An important part of geometry computations for synthetic aperture radar (SAR) carried on a satellite platform is to convert between the instrument-specific coordinate system and a geocentric coordinate system such as Cartesian Earth-centered, Earth-fixed (ECEF) coordinates, geodetic coordinates (latitude/longitude) or a projection of these. The solutions for points on or near ellipsoid height typically involves iteration over geodetic coordinates, which means performing the transformation from geodetic to ECEF and its 6 partial derivatives in every iteration step. We present a method for solving these equations in the satellite’s zero Doppler plane, which is typically used as coordinate plane for SAR systems with small squint angles. Solving the system in this plane means one of the constraints is satisfied implicitly, and allows solution which satisfies the other constraint (correct range from satellite) to be solved using a one-dimensional Newton method. The method is simple to implement, fast and accurate. For targets on the ellipsoid, the solution can be made as accurate as machine precision allows. For high-precision applications with targets at non-zero height above the ellipsoid, a small correction step is necessary, and we describe how to arrive at this step.
Article
Computer Science and Mathematics
Geometry and Topology

Ryan Buchanan

Abstract: Classical loop-spaces capture cyclic behaviour in topology but are blind to the auxiliary data that often drives real-world quasi-periodic phenomena. In this paper we introduce decorated loop-spaces, organised into a category $\mathbf{DecLpSpc}$, whose objects are spaces equipped with “decorators” (labelling generators by auxiliary data) and whose morphisms are “connectors” acting on families of functions. We construct a decorated loop functor $$\widehat{\Omega} : \mathbf{DecLpSpc} \to \mathbf{DecLpSpc},$$ define a notion of decorated concatenation, and prove coherence and functoriality results in the spirit of Eckmann–Hilton duality. On the homotopical side, we extend classical Whitehead products and higher homotopy brackets to the decorated setting, obtaining decorated Whitehead products and Jacobiators that refine the quasi-Lie structure on homotopy groups by keeping track of decoration data. We show that $\mathbf{DecLpSpc}$ admits a natural symmetric monoidal structure and support operads acting on decorated loop-spaces, giving a recognition principle for iterated decorated loop functors $\widehat{\Omega}^n$. A worked example on a wedge of spheres illustrates how decorations enrich a nontrivial Whitehead product with additional algebraic labels. Finally, we outline several applications in which decorations encode physically or computationally meaningful structure: string dynamics and vacuum expectation values in background fluxes, evolutionary dynamics where decorations separate epigenetic from phenotypic data, and feedback and signal-processing architectures (including an OCR-inspired case study) where connectors transport function families between different feature spaces. We conclude with directions for an intrinsic homotopy theory of $\mathbf{DecLpSpc}$, computable invariants, and data-driven variants of the framework.
Article
Chemistry and Materials Science
Biomaterials

Angelina Karamesouti

,

Maria Chatzinikolaidou

Abstract: The design of biomaterial scaffolds for bone tissue engineering requires a balance between bioactivity, porosity, mechanical stability, and osteoinductivity. Kappa- (KC) and iota-carrageenan (IC) have been explored for scaffold fabrication due to their biocompatibility and structural similarity to glycosaminoglycans. However, there are limited reports on how their distinct sulfation degree affects the osteogenic differentiation of cells cultured on them. While laponite has been reported as an osteoinductive nanoclay, its combined effect with different carrageenan types and its concentration-dependent effect on scaffold functionality remain unexplored. Therefore, we developed composite scaffolds comprising poly(vinyl alcohol) (PVA) and gelatin (GEL), reinforced with kappa- or iota-carrageenan (KC, IC) and functionalized with two different concentrations of laponite (LAP), 0.5 and 1% w/v, to monitor composition-structure-function relationships. The scaffolds were fabricated via lyophilization and dual crosslinking, and characterized for their physicochemical, structural, mechanical, and biological properties. The incorporation of both carrageenans into scaffolds, maintained high swelling ratios of 600% after 24 h, and increased porosity without altering their apparent density (0.09-0.11 g/cm3), whereas LAP preserved interconnectivity, densified pore walls, raised their compressive modulus at >220 kPa, and improved stability (&gt;60% mass retained after 40 days). In vitro validation using MC3T3-E1 pre-osteoblastic cells demonstrated robust cytocompatibility, with the LAP-containing scaffolds significantly promoting cell adhesion, proliferation, and osteogenic differentiation, evidenced by elevated alkaline phosphatase activity, calcium production and collagen secretion. Direct comparison between KC and IC scaffolds confirmed that differences in sulfate substitution modulated scaffold stiffness, swelling, and degradation, while variation in LAP concentration affected the biological response, with the 0.5 wt% concentration favoring early cell proliferation, whereas the 1 wt% significantly promoted the osteogenic differentiation. This compositional strategy demonstrates how tuning the interplay between carrageenan and laponite can balance scaffold hydration, mechanical and biological properties, thereby guiding the design of scaffolds for bone repair.
Article
Biology and Life Sciences
Animal Science, Veterinary Science and Zoology

Betina Boneva-Marutsova

Abstract:

Snakes are becoming increasingly popular as companion animals in Bulgaria, yet their potential as reservoirs for zoonotic pathogens remains underexplored. This study investigates bacterial carriage in domesticated snakes and evaluates the public health risks associated with their handling. Materials and methods: Bacteriological analysis was performed on 29 snake samples from various species, including pythons, boas, corn snakes, and a venomous species. All individuals were raised in controlled environments and primarily fed frozen rodents. Standard microbiological techniques were employed for bacterial isolation and identification, and the results were confirmed using the Vitek 2 Compact System. Results: Salmonella enterica (group B) was isolated from 8 samples, indicating a notable prevalence of this pathogen among the examined snakes. Additionally, several other bacterial genera were identified, including Pseudomonas spp., Staphylococcus spp., Proteus spp., Enterobacteriaceae spp., Sphingomonas paucimobilis, Enterococcus spp., Bacillus spp., Achromobacter denitrificans, Citrobacter koseri, and Klebsiella pneumoniae. Conclusion: The study highlights the zoonotic risks associated with snake ownership, particularly through direct contact with the reptiles or exposure to contaminated environments. Food sources may act as vectors for microbial contamination. To mitigate the risk of bacterial transmission between snakes and humans, it is crucial to adopt rigorous hygiene practices, conduct regular health monitoring of the snakes, and implement proper protocols for feeding and cleaning.

Article
Social Sciences
Library and Information Sciences

Carol Nash

Abstract: Well-cited articles identify Google Scholar as a sufficiently lacking database to evaluate it as supplementary regarding the preferred reporting items for systematic reviews and meta-analyses: PRISMA. Subsequent author systematic review searches have accepted this relegation of Google Scholar to supplementary status without examination. This study questions this acceptance by (1) revealing the type of difficulties with Google Scholar identified in these well-cited publications compared with PRISMA guidelines, and (2) examining several PRISMA scoping review primary database searches performed by this author since 2023 for the adequacy of Google Scholar results compared with them. The results reveal that the reasons for considering Google Scholar a supplementary database regarding PRISMA status are not convincing, as they are unrelated to PRISMA guidelines for systematic reviews. Additionally, Google Scholar was the source of the most relevant included studies for the majority of this author’s post-2023 scoping reviews. These results demonstrate that the accepted advice to authors that Google Scholar should be a supplementary database is unsupported. Regarding PRISMA guidelines, based on the results of this original research, there should be immediate reconsideration of Google Scholar's status for acceptance as a primary database.

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