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Article
Computer Science and Mathematics
Artificial Intelligence and Machine Learning

Ambar Nath Saha

,

Debashis Patra

Abstract: Longitudinal autism intervention review requires specialists to combine observations from caregivers, teachers, and intervention staff across settings and time. We developed a governance-aware human-in-the-loop application that uses AI to organize evidence while keeping intervention decisions with professionals. The system preserves original observations, proposes structured records with Qwen 2.5 7B, requires professional verification or correction before analytics, checks evidence adequacy, supports abstention, and produces traceable reports. Evaluation used archival ASDBank data from 11 children, 85 sessions, and 9,018 behavioral episodes. Two experienced autism specialists created the reference standard, followed by a final-codebook compliance audit. Qwen 2.5 7B achieved 41.3% merged categorical agreement on the 330-segment main batch and remained the strongest evaluated generator. The offline MARS selector returned records for 80.3% of segments but showed no clear field-level advantage over the strongest reviewable generator. A historical generative-reporting experiment failed its full governance contract (0/11), motivating deterministic operational reporting. Final controlled end-to-end testing passed all predefined governance scenarios (77/77 API tests and 9/9 UI scenarios). These findings support a practical architecture in which AI assists evidence organization, while professional review, abstention, provenance, and deterministic controls protect the longitudinal workflow.

Article
Computer Science and Mathematics
Applied Mathematics

Alexander Kong

Abstract: We use Random Matrix Theory to analyze the impact of COVID-19 on the correlation structure of the agricultural futures market, using daily returns for 56 futures from various countries around the world before, during, and after COVID. For each of the three time periods, we build correlation matrices of the daily returns, and we examine the matrices’ entries, eigenvalues, and eigenvectors. We find that agricultural futures exhibited stronger collective behavior during COVID than before or after it. We also find clustering based on geographic location, with there being one cluster in the West (North America, South America, Europe) and one in the East (Asia, Oceania), which show predominantly opposite-signed loadings relative to the dominant market mode; since pre-pandemic times, the East has gained weight in the market while the West has lost it. On top of regional clustering, we also find independent exchange-level clustering, where futures tend to be more correlated with futures in its same exchange than any other. Our results demonstrate how Random Matrix Theory can reveal both transient changes in collective behavior and longer-term structural patterns in an interconnected global market.

Article
Computer Science and Mathematics
Mathematics

Lei Zhou

Abstract: For a fixed integer \( n\ge2 \), let \( \Delta_{n-1} \) denote the standard probability simplex in $\( \mathbb R^n \)$. We introduce and analyze the self-power escort transformation \( T_n:\Delta_{n-1}\to\Delta_{n-1} \) defined by \( \begin{equation*}T_n(p)_i=\frac{p_i^{p_i}}{\sum_{j=1}^n p_j^{p_j}},\qquad i=1,\ldots,n,\end{equation*} \) with the continuous boundary convention \( 0^0=1 \). Unlike the usual power escort transformation, whose exponent is an external parameter, the exponent here is the coordinate itself; equivalently, each coordinate is reweighted by \( \exp(p_i\log p_i) \). The paper proves that this elementary self-feedback rule has a rigid global dynamics. Every boundary point is immediately activated, every orbit enters an explicitly described compact core after one step, the uniform distribution is the unique fixed point, and the Hilbert log-diameter contracts exponentially after core entrance. Consequently every orbit converges exponentially to the uniform distribution, and no nontrivial periodic orbit exists. We then compute the complete linear spectrum and second-order normal form at the uniform state, obtaining a sign transition between the binary and higher-dimensional systems. For \( n\ge4 \), the post-core Hilbert contraction constant is sharpened to a two-variable min--max problem involving only the smallest and largest coordinates. We also classify the entire one-step uniformization fiber \( T_n^{-1}(\nu_n) \): besides the vertices and the uniform point, each dimension \( n\ge3 \) has exactly one nonuniform interior orbit type, up to permutation. Finally, in the binary case we prove global contraction in logit coordinates and an arithmetic escape phenomenon: algebraic irrational inputs become transcendental after one step, while rational nonuniform inputs become transcendental after two steps.

Article
Computer Science and Mathematics
Algebra and Number Theory

Xing-Yu Hu

Abstract: We disprove the conjecture of Camacho, Khudoyberdiyev and Omirov that \(x_i^2 = \sum_j b_{ij}x_j\) has a solution with every coordinate nonzero for every nonsingular complex matrix \(B\). Dimension three is the smallest in which this conjecture fails. In that dimension, all counterexamples are equivalent under simultaneous coordinate permutations and nonzero diagonal rescalings. The exceptional locus in \(\mathrm{GL}_3(\mathbb{C})\) is the disjoint union of six smooth, closed, three-dimensional algebraic tori, each a complete intersection of codimension six. Every exceptional matrix has exactly seven nonzero entries, the minimum possible for a counterexample. A regular three-dimensional evolution algebra with at most six nonzero structure constants has a full-support idempotent, and this bound is sharp. We also give polynomial equations characterizing the exceptional locus. The proof uses elimination, traces in an Artinian complete intersection, and local multiplicities.

Review
Medicine and Pharmacology
Psychiatry and Mental Health

Sushil Kumar Sompur Vasanthkumar

Abstract: Childhood sexual abuse (CSA) is reliably associated with adult sexual dysfunction, yet the field has historically framed survivors' sexuality in terms of damage rather than recovery. This narrative review asks whether sexual health recovery can occur after childhood abuse, and what trauma-informed care contributes to it. Evidence from meta-analyses, psychophysiological studies, longitudinal cohorts, and randomized treatment trials is synthesized around three questions: the strength of the CSA–dysfunction association, the mechanisms linking them, and the responsiveness of sexual function to intervention. Meta-analytic evidence confirms the association (odds ratio 1.68, 95% CI [1.49, 1.87]), stronger among women than men, although findings are heterogeneous and moderated by comorbidity, abuse characteristics, and family context. Five mechanisms recur: posttraumatic stress with blunted genital arousal and altered cortisol response; dissociation during sexual activity; cognitive-affective processes centered on distraction and avoidance; negative sexual self-schemas and low sexual self-esteem; and relational difficulties including insecure attachment. A reframing of dysfunction as protective — avoiding re-traumatization, regulating closeness, restoring a sense of control — implies that these adaptations must be understood before function is restored. Recovery is nonetheless well documented: roughly one third of sexually abused children show no symptoms and two thirds recover within 12–18 months; latent class analysis of maltreated youth identifies resilient, survival, and improving sexual health trajectories; and mindfulness-based sex therapy and schema-focused expressive writing improve sexual function, with abused women sometimes improving more than non-abused women. Recovery is therefore not automatic but facilitated, and trauma-informed care is the condition under which it occurs.

Article
Biology and Life Sciences
Ecology, Evolution, Behavior and Systematics

Prithwish Mukherjee

Abstract: Natural selection is credited for giving direction to evolution. But it is also described as a filter acting on variation supplied by mutation, development and chance. These views highlight different regimes, not rival truths. In this paper, I ask when selection actually determines evolutionary direction. I define determination counterfactually, i.e. an outcome is selection determined if it recurs across replicate histories under the same selective regime and becomes much less likely when selection factor is removed. Here, I argue that four conditions must hold jointly- (i) selection must outweigh drift, (ii) the selective regime must persist, (iii) variation should not be biased enough to overturn selection's ranking and (iv) landscape must allow the favored route to be travelled. Each failure hands direction to a distinct process. Determination also falls as outcomes are described more firmly, from function to phenotype to sequence. Finally, six testable predictions are stated.

Article
Public Health and Healthcare
Physical Therapy, Sports Therapy and Rehabilitation

Maxime Billot M.

,

Anaïs Jedrzejowski

,

Romain David

,

Romain Tisserand

,

Fabienne Perrot

,

Amine Ounajim

,

Frédéric Viseux

,

Anaïck Perrochon

Abstract: Background/Objectives: Postural control undergoes significant maturation from adolescence to adulthood. While is promising as a means of enhancing postural stability in adults, its effect in adolescents, whose postural control is poorer, remains to be determined. This study aimed to assess the effects of a yoga intervention on postural balance in healthy adolescents and adults. Methods: Eighteen adolescents and 18 young adults completed eight two-hour Hatha yoga sessions (one per week). Postural control was assessed using a stabilometric platform to measure center of pressure (CoP) parameters. These parameters were assessed in eyes-open (EO) and eyes-closed (EC) conditions. Results: Adolescents showed higher baseline oscillations than adults. While the yoga intervention demonstrated a significant main effect of Time in the EO condition for all CoP parameters and in both groups, no difference appeared in the EC condition. A significant Group × Time interaction for CoP velocity in EO showed significantly decreased CoP velocity in adolescents but not in adults. Conclusions: An eight-week yoga program significantly improved postural control in healthy adolescents and adults in the EO condition. Adolescents exhibited CoP velocity decrease after yoga intervention, whereas adults did not. These findings advocate for integrating yoga into physical education so as to support postural development, especially during adolescence.

Article
Computer Science and Mathematics
Computer Networks and Communications

Yixuan Xin

,

Zhe Wu

,

Qian Deng

,

Xiaodong Zang

Abstract: Most existing encrypted-traffic classification methods treat each traffic flow as an independent sample, overlooking the relationships shared by similar flows. This can amplify within-class variation and increase overlap between classes, particularly when their distinguishing characteristics are subtle and labeled data are limited. To address this problem, we propose PGCL-CG, a prototype-guided semi-supervised graph contrastive learning framework. We represent flow-level statistical features as a sparse, weighted k-nearest-neighbor graph and use GraphSAGE to aggregate information from neighboring flows and to capture their underlying structural relationships. The encoder is pretrained using self-supervised graph contrastive learning to obtain stable representations. We use a student-teacher architecture to produce more stable pseudo-labels and apply hierarchical density-based spatial clustering to filter out low-confidence assignments. We conduct extensive experiments on the two open datasets, demonstrating that PGCL-CG outperforms competitive baselines and remains robust even when only a small fraction of labels (e.g., 20% or 40%) is available.

Case Report
Medicine and Pharmacology
Other

Marin Ogorevc

,

Ana Mustapić

,

Tomislav Smoljo

,

Marinela Križanac

,

Marija Petrović

,

Maja Buljubašić Šoda

,

Ante Tavra

,

Bernarda Lozić

,

Feodora Stipoljev

Abstract: Ring chromosomes (RCs) are rare structural chromosomal abnormalities caused by terminal breaks and fusion of chromosome ends, occurring in approximately 1 in 50,000 live births. They are often associated with “ring chromosome syndrome,” characterized by growth restriction, mild dysmorphism, and variable intellectual disability, even without large deletions. Ring chromosome 2 is exceptionally rare, with fewer than 20 reported cases and limited molecular characterization. We report a 4-year-old male with proportional growth restriction, mild facial dysmorphism, and delayed expressive speech. Cytogenetic analysis identified a mosaic ring chromosome 2, and fluorescence in situ hybridization demonstrated preserved subtelomeric regions. However, array comparative genomic hybridization revealed a 46 kb deletion at 2p25.3 involving the protein-coding gene FAM110C. This case broadens the phenotypic and molecular spectrum of ring chromosome 2 and underscores the value of combining cytogenetic and high-resolution genomic techniques to detect cryptic imbalances contributing to clinical presentation.

Article
Environmental and Earth Sciences
Water Science and Technology

Péter Koska

,

Tímea Fóris

,

Kitty Gráczer

,

Béla Fiser

,

László Vanyorek

,

Béla Viskolcz

Abstract:

Adsorption isotherm parameters are widely used to characterize biosorbent performance and are often interpreted as intrinsic properties of the adsorbent. However, the extent to which these parameters depend on biosorbent concentration remains insufficiently understood. Here, the adsorption of Ni²⁺ and Cd²⁺ by Chlorella vulgaris was systematically investigated over a broad range of biomass concentrations by determining complete adsorption isotherms independently at each biomass level. Increasing biomass concentration consistently decreased the specific adsorption capacity and shifted the adsorption isotherms toward lower apparent saturation capacities for both metal ions. Langmuir and Freundlich models were fitted using both linearized and nonlinear regression. Despite differences in the absolute parameter values obtained by the fitting approaches, all models revealed the same biomass-dependent trend. In particular, the Langmuir maximum adsorption capacity (qmax) and Freundlich adsorption coefficient (KF) decreased systematically with increasing biomass concentration. These results demonstrate that biomass concentration influences the experimentally observed adsorption behaviour and the isotherm parameters derived from it. Consequently, qmax and KF should not be interpreted as universal material constants without considering the biomass concentration at which they were determined. Biomass concentration should therefore be reported and considered when comparing biosorption isotherms across independent studies.

Article
Medicine and Pharmacology
Neuroscience and Neurology

Elizabeth C. Roberts

,

Magdelena Murawska

,

Laurie K. Mischley

Abstract: Non-motor symptoms drive much of the disability and quality-of-life loss in Parkinson's disease (PD), yet they remain poorly served by dopaminergic therapy. Omega-3 polyunsaturated fatty acids (n-3 PUFAs), principally eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), are biologically plausible modifiers of these symptoms through effects on membrane composition, neurotransmission, and the resolution of inflammation, but the relationship between measured blood n-3 status and the PD symptom profile has not been systematically mapped. Methods: In a retrospective cross-sectional clinic cohort, patients with PD who completed a baseline Patient-Reported Outcomes in Parkinson's Disease (PRO-PD) assessment and a Cleveland HeartLab Parkinson's Disease Panel between 2019 and 2024 were analyzed (n = 235). Analyses proceeded in three tiers: (i) an agnostic correlation screen of the full blood panel against total PRO-PD; (ii) symptom-resolved linear models of each fatty-acid marker against each of the 35 PRO-PD items, adjusted for age, gender, and years since diagnosis; and (iii) categorical below/normal/above models using laboratory reference windows. Results: Omega-3 Total and OmegaCheck were among the strongest negative correlates of total PRO-PD across the entire blood panel (ρ = −0.19, p = 0.01), while the arachidonic acid (AA)/EPA and omega-6: omega-3 ratios were among the strongest positive correlates (ρ = 0.22 and 0.19). Symptom-resolved mapping localized this signal: the largest and most consistent associations fell in the affective (anxiety, depression), motivational (loss of interest, motivation), and cognitive (memory, comprehension) domains, with comparatively sparse associations across cardinal motor items. DHA showed the largest effect estimates (e.g., depression β = −4.82, p = 0.0005; loss of interest β = −5.37, p = 0.0003). Conclusions: In this clinic cohort, low blood n-3 status was associated with greater symptom burden, and that burden was concentrated in neuropsychiatric rather than motor domains. Findings are cross-sectional and do not establish that supplementation improves symptoms; they do identify the endpoints on which interventional trials are most likely to detect an effect.

Review
Medicine and Pharmacology
Psychiatry and Mental Health

Sushil Kumar Sompur Vasanthkumar

Abstract: Clozapine remains the only antipsychotic with proven superiority for treatment-resistant schizophrenia, yet its use is constrained by marked interindividual variability in both response and toxicity and by a burdensome adverse-effect profile spanning agranulocytosis, myocarditis, and metabolic syndrome. Three decades of pharmacogenetic research have sought genetic markers capable of predicting, before treatment begins, who will respond and who will suffer harm. This narrative review critically re-examines that record across three domains: pharmacokinetics (metabolism and transport), pharmacodynamics (treatment response), and adverse drug reactions, before evaluating the gap between research findings and clinical implementation. Pharmacokinetic pharmacogenetics has been the field’s most consistent disappointment: CYP1A2 genotype contributes little beyond smoking status, and CYP2C19 and ABCB1 variants exert only modest effects on plasma concentrations. Pharmacodynamic pharmacogenetics has fared no better; candidate genes in the serotonergic and dopaminergic systems, including the celebrated six-single-nucleotide-polymorphism response model, have failed replication in genome-wide and independent cohorts. Only the adverse-reaction domain has yielded durable findings: HLA-DQB1 126Q, HLA-B 158T, and population-specific alleles such as HLA-B*59:01 are biologically coherent and replicated correlates of clozapine-induced agranulocytosis, yet their predictive values remain too low to alter mandatory hematological monitoring. This review identifies five recurring methodological failures underlying this pattern of underdelivery: chronically inadequate sample sizes, phenotype heterogeneity, inadequately handled population stratification, conflation of biological plausibility with clinical evidence, and a translational logic gap between statistical association and actionable prediction. No genetic marker or panel currently meets the evidentiary threshold required to guide clozapine initiation, dosing, or monitoring. Therapeutic drug monitoring informed by smoking status already delivers much of what pharmacogenetics promises, at lower cost and with more direct capture of the dominant determinants of clozapine exposure. Large, adequately powered, trans-ancestral genome-wide studies, evaluated against prospective clinically meaningful outcomes, are needed before genetic testing can be considered ready for clozapine prescribing decisions.

Article
Engineering
Mechanical Engineering

Abisai Jaime Reséndiz-Barrón

,

Daniel Armando Serrano-Huerta

,

Carlos Velasco-Santos

,

Ana Laura Martínez-Hernández

,

Allan Ronier Diez-Barroso-Agraz

,

Juan Serrano Arellano

Abstract: The increasing use of lithium-ion batteries (LIBs) has increased the need for physical pre-treatment methods capable of recovering electrode materials prior to downstream recycling processes. Mechanical separation can provide an effective initial removal of electrode coatings; however, residual active material may remain attached to the metallic current collectors, limiting the recovery of clean electrode fractions. In this work, a sequential mechanical–ultrasonic approach is investigated for the recovery of electrode materials from spent commercial 18650 lithium-ion battery cells. The proposed approach combines an initial mechanical removal step with short ultrasonic treatment cycles applied to the residual electrode coating. Mechanical activation between ultrasonic cycles was used to promote the detachment of remaining material while limiting prolonged exposure of the metallic current collectors to ultrasonic treatment. Preliminary continuous ultrasonic experiments showed that extended treatment increased degradation of the current collectors without producing a proportional improvement in coating removal, providing the basis for the sequential procedure. The recovered fractions were characterized to evaluate their composition, structural characteristics, and degree of separation from the metallic current collectors. A mass balance accounted for 14.58 g of recovered cathode material, while a 0.28 g difference remained unaccounted for and could not be experimentally assigned to a specific loss mechanism. X-ray diffraction confirmed chemically distinguishable cathode fractions, while energy-dispersive spectroscopy of the ultrasonic-recovered fraction showed a low average aluminum content of 0.21 wt.%. The results demonstrate that short, mechanically assisted ultrasonic treatments can effectively remove residual electrode material while limiting collector deterioration. These findings support the use of ultrasound as an assisting step following mechanical separation, rather than as a standalone delamination process, for the physical recovery of electrode materials from spent lithium-ion batteries.

Article
Environmental and Earth Sciences
Remote Sensing

Zhidong Yuan

,

Tek Maraseni

,

Xiaoye Liu

,

Zhenyu Zhang

Abstract: Retrospective mapping of aboveground biomass (AGB) using long satellite archives offers a valuable approach for assessing post-fire biomass change, but contemporary calibration does not necessarily ensure reliable transferability to historical conditions. The Global Ecosystem Dynamics Investigation (GEDI), a spaceborne lidar mission that provides observations of forest structure and biomass estimates, offers a potential source of contemporary reference data for model calibration. We evaluated this issue using a GEDI-calibrated Landsat workflow for the landscape affected by the 2009 Churchill wildfire in southeastern Australia. Random forest models combined optical, environmental and pre-fire predictors using 4,746 GEDI-linked reference observations from 2020–2023. Evaluation included reference-provenance auditing, spatial cross-validation across nine blocks with 300 m training exclusions, forward temporal and spatiotemporal tests within 2020–2023, paired predictor ablation, conditional-error diagnostics and an external field comparison. All reported provenance checks passed, supporting reference-processing integrity. The full model outperformed the training-mean baseline and reduced configurations in every block, although improvements were modest. Predictions showed a compressed range, with a prediction-to-reference standard-deviation ratio of 0.362 and regression slope of 0.104, overpredicting low reference biomass and underpredicting high reference biomass. Temporal and spatiotemporal transfer from 2020 to 2023 failed to outperform their corresponding training-mean baselines. Annual predictions declined after the fire and subsequently increased, but biomass loss and recovery were not independently validated. These findings support using the maps as descriptive reconstructions and highlight the need for independent structural observations across disturbance stages before quantitative recovery assessment or carbon accounting.

Article
Arts and Humanities
History

Ehsan Jozaghi

Abstract: This article examines the official citations of Canada’s 81 Victoria Cross (VC) recipients as a corpus of historical texts documenting battlefield heroism. Drawing on archival material from the London Gazette and the Government of Canada’s Department of National Defence, the study analyzes the narratives describing the actions for which the decoration was awarded. Using NVivo to organize and code the text, the study employed both inductive and deductive approaches to identify recurring themes in the citations. These themes include sacrificial devotion to comrades, decisive individual initiative, inspirational battlefield leadership, and perseverance in the face of severe injury or overwhelming enemy fire. Descriptive analysis of the recipients also reveals structural patterns in award distribution across conflicts, ranks, and demographic backgrounds. Taken together, the findings highlight how official military narratives constructed and commemorated heroism within the Canadian wartime experience. The article also reflects on the absence of Canadian VC awards in recent conflicts, suggesting that acts of exceptional bravery in contemporary operations, including those in Afghanistan, merit renewed consideration, in line with recognition practices in other Commonwealth nations.

Article
Computer Science and Mathematics
Artificial Intelligence and Machine Learning

Adarsh Agrawal

Abstract: Correctness feedback suppresses the very evidence that specification-completeness auditing is designed to uncover: programs that satisfy a written contract but violate intended behavior. We demonstrate this objective reversal on 12 Verus/Rust tasks across four model families under matched call budgets. Independent no-feedback discovery more than doubles certified-witness yield relative to INTENTSHIELD’s corrective-feedback loop (59.0% versus 27.1%). A format-matched iterative control places the larger share of this gap in feedback content, not independent restarts. The advantage holds in every model family and survives parser repair. A separate phase-separated execution matches the aggregate yield without reusing responses; most certified witnesses also fail held-out cases. Preserving these witnesses delivers stronger specification repair: Phase-Revised contracts achieve 81.3% implementation success, versus 62.5% for IS-Revised, with Direct-Revised close behind. Both no-feedback witness sources substantially outperform weakened contracts. The effect does not reproduce in the available Dafny and Lean evaluations, establishing an empirical boundary around the studied Verus/Rust workflow. Completeness auditing and correctness repair have opposing immediate objectives. Preserve and certify the admitted failure before repairing it.

Article
Chemistry and Materials Science
Analytical Chemistry

Ilya Kuselman

,

Valerie N. Liniva

,

Francesca R. Pennecchi

,

Anna Ballario

,

D. Brynn Hibbert

,

Angelique Botha

,

Tamar Gadrich

Abstract: A long-term stability study of a manufactured substance, material, or object (a product) is a known task in analytical chemistry (testing) laboratories serving applied science, industry and trade. It is also an important part of development of reference materials as measurement standards. The main outcome of a long-term stability study is a conformity decision at the point on the time scale when the product property value is expected to violate its tolerance/specification limit. The period of time (the interval on the time scale) from the product fabrication up to this ‘tipping point’, determined with the specified confidence probability, is recognized as the product shelf life or lifetime. After the tipping point, the product is deemed unfit for its intended use. Using a Bayesian approach, the present position paper (a perspective) considers tipping point analysis as a statistical tool to estimate the shelf life of a substance, material, or object, taking into account risks of false decisions in its conformity assessment.

Review
Social Sciences
Tourism, Leisure, Sport and Hospitality

Delfina Dualde-Beltrán

,

Miguel Crespo

,

Rafael Martínez-Gallego

Abstract: Maintaining physiological function, mobility, and independence throughout aging remains a major challenge in exercise and health sciences. Physical activity is widely recognized as a key determinant of healthy aging, yet different sports may confer distinct biological benefits. Tennis is unique in that it combines aerobic and anaerobic exercise, neuromuscular coordination, cognitive engagement, perceptual demands, and functional movement demands (balance, agility, change-of-direction performance, motor coordination) within a single activity. This comprehensive review synthesizes current evidence regarding the biological adaptations associated with tennis participation across the lifespan and evaluates its potential contribution to healthy aging and longevity. Available evidence indicates that regular tennis participation is associated with improved cardiovascular and cardiometabolic health, enhanced musculoskeletal function, greater bone mineral density, maintenance of cognitive and perceptual abilities, and improved psychological well-being. Studies involving veteran and masters tennis players further suggest that long-term participation may attenuate age-related declines in physical and cognitive function while supporting successful aging and quality of life. Emerging research also highlights potential benefits related to neuromuscular function, sensorimotor performance, perceptual-cognitive abilities and functional independence. Collectively, the literature supports tennis as a multidimensional lifelong physical activity capable of promoting health across biological, psychological, and social domains. While much of the current evidence remains observational, the available literature consistently suggests that tennis participation is associated with adaptations relevant to healthy aging and functional health. Further longitudinal studies are needed to clarify the underlying mechanisms and strengthen evidence-based recommendations for healthy aging, maintenance of physical function, and preservation of mobility across the lifespan.

Article
Environmental and Earth Sciences
Remote Sensing

Belete Baychken Kassaneh

Abstract: Lithological identification and mapping are crucial in understanding geological processes, mineral exploration, natural resource management, land-use planning, and other applications. Conventional field-focused mapping of geology is often requiring a lot of time and expensive, particularly in remote and rugged terrains, like in our area. Recent advances in satellite remote sensing provide efficient tools for lithological discrimination. This study explores the application of Sentinel-2 multispectral imagery to develop a lithological map in a case of Meda kebele. The Sentinel-2 satellite image was classified by using support vector machine (SVM) classification system to prepare a excellent geological map, which was validated by previous geological maps and field surveys For this purpose, several band combinations, spectral indices, and image processing methods, including OIF, ICA and PCA, were used in order to enhance the contrast among different rocks. Following that, a supervised classification supported by field survey and previous lithological maps of the area was carried out to create a lithological map. The results show that Sentinel-2 imagery can distinguish between the common geological units found in the area, which include metavolcanics, basalt, dolomite, limestone, marble, slate and sandstone, due to it has good spatial resolution of 10- 60 m and vast spectral extent from VNIR-SWIR. This paper highlights the significance of Sentinel-2 data for regional geological mapping, giving baseline information for mineral prospecting and resource management in Meda kebele.

Article
Business, Economics and Management
Business and Management

Victor Amedome Gbomita

Abstract: Studies of festivals and urban tourism usually examine one event at a time, and most of them concern cities in Europe and North America. This article compares two festivals in Accra, Ghana, that share a city and a season but differ in origin, purpose and governance: Homowo, the long-established harvest festival of the Ga people, and the Chale Wote Street Art Festival, a contemporary arts festival founded in 2011. Using a comparative case design built on secondary data, it examines five dimensions: tourism demand and reach, economic contribution, spatial and urban effects, heritage and identity, and governance. The evidence comprises official tourism statistics, a coded corpus of 53 media and official texts, and a log of 14 governance actions dated 2014 to 2026. A companion study has shown that official data cannot isolate the tourism effects of either festival, so this article asks how the two festivals have changed rather than how much they contribute. They share the same mid-year travel season and the same concentrated tourism economy, yet they are close to opposites in representation, reach and governance. Chale Wote has moved through a recognisable event lifecycle, from an unfunded neighbourhood event to an institutionalised festival whose centre shifted to the commercial district of Osu in 2023. Homowo has begun a different trajectory: the touristification of an established sacred practice, in which state partnership and a new commercial carnival are kept apart from the rites, against a background of contested authority and violence. The article argues that festivalisation follows different paths for heritage and contemporary festivals in the same city, proposes that lifecycle models be adapted for heritage festivals, and extends the commemoration–commodification continuum to living festival heritage.

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