bluuebunny/crossref_metadata_2025 huggingface dataset:
Connecting Environmental Perception, Awe, Face Consciousness, and Environmentally Responsible Behaviors: A Mediated-Moderated Analysis
Authors: Yan Youxu , Wang Xueji , Tse Serene , Wang Lei
Published: June 2024

Tourists’ environmentally responsible behavior (TERB) is one of the key areas in tourism as it concerns tourism sustainability that further influences a destination’s competitiveness and image. This study sought to deepen the formation of TERB through tourists’ degree of environmental perception, mediated by their feeling of awe towards the environment, and moderated by their level of face consciousness. Data were collected from tourists in Tibet and the findings indicated that awe exerted partial mediation on the tourists’ perception-behavior relationship. Furthermore, face consciousness moderated the mediated relationship of humanistic environmental perception, awe, and TERB. This study adds value to existing tourism studies by revealing the influences of awe on constructing tourists’ attitude in sustainable tourism. From a practical perspective, the findings offer insights for destination management organizations (DMOs) in promoting tourists’ environmentally responsible behavior that fosters sustainable tourism development.
The Relationship between Participation in Extracurricular Arts and Sports Activities and Adolescents’ Social and Emotional Skills: An Empirical Analysis Based on the OECD Social and Emotional Skills Survey
Authors: Wang Weihao , Li Wenye , Yao Jijun
Published: June 2024

In light of the ‘double reduction’ policy, which affords adolescents increased time for extracurricular pursuits, the strategic organization of these activities’ form and content is imperative. Prior research has established a robust correlation between adolescent participation in extracurricular arts and sports and the enhancement in their social and emotional skills. Nevertheless, the relationship between extracurricular arts and sports activities and the various dimensions of social and emotional skills, as well as the connection between participation in different types of these activities and the enhancement in social and emotional skills, requires further investigation. Utilizing the Theory of Multiple Intelligence and data from the OECD-SSES2019 Suzhou (China) student survey, this study employs Ordinary Least Squares (OLS) and coarsened exact matching (CEM) methodologies to address these gaps. In China, participation in extracurricular arts and sports activities is significantly positively associated with various dimensions of social and emotional skills, with a synergistic effect observed between these activities in enhancing these skills. Additionally, this study finds age-related heterogeneity in the relationship between participation in extracurricular arts and sports activities and the improvement in social and emotional skills.
A Case Study Investigating the Relational Well-Being of International Students at Hohai University Nanjing, Jiangsu Province of China
Authors: Ying Haihua , Khoso Abdul Rasool , Bhutto Shahnaz
Published: June 2024

This study acknowledges the growing importance of international student mobility and examines the relational well-being of international students at Hohai University in Nanjing, China. Understanding the complexities of interactions among international students is essential for their well-being and the university’s overall success, since this tendency continues to increase. By examining the distinct possibilities and problems faced by international students at Hohai University and considering elements including cultural distinctiveness, the campus environment, interpersonal dynamics, and support networks, the study fills a research void. For this purpose, 150 international students at Hohai University participated in semi-structured interviews and 10 participants participated in unstructured interviews as part of the mixed-methods approach to obtain in-depth information. Hence, the descriptive data were analyzed using SPSS and qualitative analyses were performed using NVIVO. According to preliminary findings derived from quantitative data, important results emphasize the significant impact of homesickness (0.143, T value: 5.931) and the positive correlation of relational well-being (0.146), highlighting their significance. The effect of the language barrier is also significant (0.125, T value: 4.378), whereas loneliness has little bearing (0.011, T value: 0.847). Additionally, the highest concern of the international students (M = 8.35; SD = 1.43) was making connections with local students. Additionally, (M = 8.21; SD = 1.15) international students favored Hohai University, which provided a welcoming atmosphere for intercultural dialogue. The Foreign Student Office, social events, cultural exchange programs, counseling services, and peer support networks are just a few examples of the support structures and networks crucial to international students’ general well-being. At the same time, the cultural hurdles, including the language barrier and loneliness, seemed to be the challenge. The study concludes by shedding light on the relational well-being of international students at Hohai University and highlighting the importance of community-building and supporting actions. The results provide insightful information that will help the institution better respond to the particular difficulties that international students encounter, creating a more welcoming and stimulating atmosphere. This study establishes the foundation for further research in comparable contexts and advances our understanding of relational well-being in the context of experiences for overseas students.
Building Urban Community Resilience against Hazards through Public-Private Partnerships: A Review of Critical Resilience Strategies
Authors: Osei-Kyei Robert , Ampratwum Godslove , Tam Vivian W. Y. , Komac Ursa , Narbaev Timur
Published: June 2024

The need for governments and stakeholders to find urgent solutions to address the destructive effects of disasters in urban areas has led to the call for cross-sector collaborations such as public-private partnerships to assist with the development of urban community resilience in this modern era. This paper comprehensively reviews studies on the critical strategies in using public-private partnerships as a collaboration mechanism in building urban community resilience. Through a two-stage systematic literature review process, 83 publications related to PPPs and urban community resilience were retrieved for thorough content analysis. Based on an analysis of the literature, 35 critical resilience strategies for using PPPs in building urban community resilience were derived. These strategies were further categorized into nine major groupings. These groups include vulnerability and risks assessment, information gathering, database, legal, monitoring and evaluation, resilience capacity, communication and coordination, financial incentives, and business continuity. Furthermore, a theoretical framework was developed. These resilience strategies can be adopted by states and communities that intend to use the PPP concept to build the resilience of their urban communities. It also opens the international debate on the suitability of the PPP model for community resilience building.
Scenarios of Progressive Pancake/Bending Collapse Considering Elastic/Plastic Reinforced Concrete Buildings
Authors: Zacchei Enrico , Gorla Nogueira Caio
Published: June 2024

Quantitative analyses of structural resistance are useful during the design process to prevent the occurrence of progressive collapse. Buildings subjected to continuous instances of expected/non-expected loadings due to extreme events (e.g., earthquakes, explosions, floods, hurricanes) can collapse. A lack of specific knowledge from the designer and poor maintenance can affect collapse analyses. In this paper, the probability of failure for pancake collapse with respect to bending collapse for reinforced concrete (RC) multi-storey buildings is estimated. New combinations regarding the elastic/plastic behaviour of the material under distributed loadings on beams are proposed. Numerical 2D finite element method (FEM) analyses are carried out to model these buildings. Also, simplified dynamic analyses are carried out. The outputs are plotted in terms of the probability of failure for pancake collapse as a function of column compressive strength and the number of removed columns. The results show that the presence of elastic beams can influence the pancake collapse of columns, and, for buildings composed of several elements, the elimination of few elements has little impact on their stability.
Experimental Study and Analysis of the Effects of Mud on the Compressive Strength of Unburned Brick Using Engineering Residue Soil
Authors: Nong Xingzhong , Zhou Linren , Liang Yuehua , Wang Taojun
Published: June 2024

Engineering residue soil, a prominent type of construction solid waste, can offer considerable environmental and socioeconomic benefits if efficiently utilized. Unburned brick represents an environmentally friendly and high-value approach to reusing this residue soil. Mud, a primary constituent of residue soil, typically hinders the performance of unburned brick using cement-based materials. This study investigates the effects of mud on the performance of unburned brick made from engineering residue soil based on experimental tests and mechanism analysis. The residue soil is silty clay sourced from the alluvial soil layer in South China. A comprehensive analysis of the physical and chemical properties of the residue soil and mud is conducted to assess the feasibility of using them in unburned brick production. Using ordinary Portland cement as the cementitious material, the unburned residue soil bricks are produced via semi-dry static-press forming and natural curing. The influence of mud type and content on the compressive strength of the unburned brick made with engineering residue soil is investigated and discussed. This experimental study reveals that the influence of mud on unburned brick’s compressive strength is negligible. However, excessively low mud content reduces brick compactness, impairs brick formation, and leads to lower compressive strength. Within the range of solidification, unburned brick’s compressive strength initially increases and then decreases with increasing mud content, with an optimal mud content of approximately 25%. As engineering residue soil often contains a high mud content, reducing it effectively enhances the compressive strength of unburned bricks. Through experiments and mechanism analysis, this research clarifies the impact of mud on the strength and performance of unburned residue soil bricks, providing important theoretical insights and practical guidance for the production of unburned products and promoting the efficient and environmentally friendly resource utilization of engineering residue soil.
The Influence of CO2 Curing on the Properties of Coal Gangue Non-Fired Blocks
Authors: Sun Bing , Wang Hui
Published: June 2024

Coal gangue is a solid waste, which can cause serious pollution of the atmosphere and water sources due to its long-term accumulation. In this article, the influence of CO2-cured coal gangue on the slump flow, the mechanical strengths, the thermal conductivity coefficient, the chloride ion permeability, the water resistance coefficient and the leached Pb of the coal-gangue-block masonry are determined. Moreover, the temperature distributions at different measuring points of a coal-gangue-block cabin model are obtained. The results exhibit that CO2-cured gangue demonstrates positive effects on the slump flow, the mechanical strengths and the thermal conductivity coefficient, with the slump flow rates increasing by 0%~23.6%, the mechanical strength rates increasing by 0%~222.7% and the thermal conductivity coefficient rates increasing by 0%~73.2%. Straw fibers increase mechanical strengths and decrease thermal conductivity at rates of 0%~222.7% and 0%~32.6%. Foam decreases the mechanical strengths and the thermal conductivity coefficient by 0%~71.2% and 0%~87.1%. The chloride ion migration coefficients are decreased by 0%~42.1% and 0%~43.7% with the added CO2-cured coal gangue and the straw fibers. The added foam leads to an increase in the chloride ion migration coefficient of 0%~73.2%. The foam and the straw fibers show delaying temperature changes in a coal-gangue-block cabin model, while when CO2-cured coal gangue is added, the effect is the opposite. The CO2-cured coal gangue and the straw fibers lead to decreases in the leached Pb and Zn, while when the foam’s mass ratio increases, the result is the contrary.
Public Aesthetic and Recreational Preferences for Historical Irrigation Canals in Rural Areas: A Case Study in Li Canal-Gaoyou Irrigation District
Authors: Zhong Yujia , Zhang Menghan , Xia Yiwen , Hao Rong , Tan Li
Published: June 2024

As an integral part of rural built heritage, the aesthetic and recreational values of Historical Irrigation Canals (HICs) have increasingly garnered attention in recent years, providing new perspectives for heritage conservation and sustainable rural development. However, there is a scarcity of research conducted from the micro-perspective of public preferences for HICs in rural areas. The existing literature primarily focuses on how the landscape characteristics of natural and urban rivers affect public preferences, with a lack of attention to built heritage characteristics and rural settings, which are uniquely inherent to HICs in rural areas. This study aims to explore public preferences for HICs in rural areas from the perspectives of landscape characteristics and social backgrounds. The Li Canal-Gaoyou Irrigation District, one of the World Heritage Irrigation Structures, was selected as the case study. Selected HIC photos were utilized for measuring landscape characteristics and conducting survey questionnaires. Relationships among HIC landscape characteristics, social backgrounds, and aesthetic and recreational preferences were revealed through one-way ANOVA, Spearman’s correlation, and stepwise regression analyses. Key findings include the following: (1) the public can derive aesthetic and recreational value from HICs; (2) canals with large water bodies, artificial banks, and artificial vegetation are considered more aesthetically pleasing; (3) larger canals, extensive water bodies, and artificial banks are deemed more suitable for recreation; (4) factors such as age, education level, income, rural living experience and knowledge of HICs influence public preferences; (5) costs influence public aesthetic and recreational preferences, with people more willing to pay for roads and hardened banks. Finally, several recommendations for the protection and management of HICs have been summarized, offering guidance for rural managers and planners.
Exclusive Papers of the Editorial Board Members and Topical Advisory Panel Members of Catalysts in Section “Catalysis in Organic and Polymer Chemistry”
Authors: Nomura Kotohiro , Mancuso Raffaella , Cai Zhengguo , Dagorne Samuel , Eisen Moris S. , Gonsalvi Luca , Kotora Martin , Lee Bun Yeoul , Liu Shaofeng , Martins Luísa Margarida , Ohkuma Takeshi , Pombeiro Armando , Ragaini Fabio , Redshaw Carl , Visseaux Marc , Wu Zongquan , Yoshida Hiroto , Ogasawara Masamichi
Published: June 2024

Herein, I would like to provide an overview of this Special Issue, published in the Organic and Polymer Chemistry Section of Catalysis, comprising contributions from 18 of the journal’s Editorial Board Members [...]
Bacterial Ribosomes Induce Plasticity in Mouse Adult Fibroblasts
Authors: Datta Anamika , Istiaq Arif , Tamura Shigehiko , Ohta Kunimasa
Published: June 2024

The incorporation of bacterial ribosome has been reported to induce multipotency in somatic and cancer cells which leads to the conversion of cell lineages. Queried on its universality, we observed that bacterial ribosome incorporation into trypsinized mouse adult fibroblast cells (MAF) led to the formation of ribosome-induced cell clusters (RICs) that showed strong positive alkaline phosphatase staining. Under in vitro differentiation conditions, RICs-MAF were differentiated into adipocytes, osteoblasts, and chondrocytes. In addition, RICs-MAF were able to differentiate into neural cells. Furthermore, RICs-MAF expressed early senescence markers without cell death. Strikingly, no noticeable expression of renowned stemness markers like Oct4, Nanog, Sox2, etc. was observed here. Later RNA-sequencing data revealed the expression of rare pluripotency-associated markers, i.e., Dnmt3l, Sox5, Tbx3 and Cdc73 in RICs-MAF and the enrichment of endogenous ribosomal status. These observations suggested that RICs-MAF might have experienced a non-canonical multipotent state during lineage conversion. In sum, we report a unique approach of an exo-ribosome-mediated plastic state of MAF that is amenable to multi-lineage conversion.
Uveitis in the Pediatric Population and Therapeutic Management: A Current Literature Review
Authors: Modrzejewska Monika , Zdanowska Oliwia , Świstara Dawid , Połubiński Piotr
Published: June 2024

Uveitis is an inflammatory disease that can lead to severe complications, including vision loss. The pediatric population is particularly at risk of developing complications, as uveitis in this age group often has idiopathic origins or is associated with systemic diseases that follow a severe course. This, coupled with unfavorable treatment outcomes, continues to be a challenge in pediatric ophthalmology. The cornerstone of uveitis treatment involves a therapeutic strategy that depends on the etiology, severity, and localization of the inflammation, as well as the patient’s response to treatment and the presence of ocular complications. Patients who do not receive timely treatment face a significantly increased risk of experiencing a severe disease course. Understanding potential therapeutic options and their side effects is crucial in managing children with uveitis. Equally important is the continuous monitoring of the child’s condition throughout the treatment process, due to the chronic and recurrent nature of uveitis in this demographic. The authors conducted a review of the current literature from 2018 to 2023 on the management and introduction of new therapeutic approaches for children with uveitis.
Research on Fatigue Performance of Fast-Melting SBS/Epoxy Resin Composite-Modified Asphalt
Authors: Men Bo , Li Xiaoyu , Sha Tianyu , Guo Fei , Tang Guoqi , Yue Jinchao
Published: June 2024

A high-performance composite modifier ER-SBS-T was prepared through the mixing of epoxy resin with a fast-melting styrene–butadiene–styrene modifier (SBS-T) to enhance material properties. This study evaluated the fatigue characteristics of ER-SBS-T-modified asphalt using a linear amplitude sweep test, and 70# base asphalt, SBS-modified asphalt, and SBS-T-modified asphalt were used as control groups. The fatigue life of ER-SBS-T-modified asphalt was determined according to viscoelastic continuous damage (VECD) theory. The findings indicated that as the ER-SBS-T modifier content increased, both the maximum value and the cumulative damage limit value increased, while the rate of change of decreased. At strain levels of 2.5% and 1%, the fatigue life of the modified asphalt improved with increasing ER-SBS-T content. However, at a strain level of 5%, the modified asphalt exhibited no significant trend in fatigue life across different ER-SBS-T contents. ER-SBS-T-modified asphalt with a modifier content of >10% demonstrated favorable fatigue performance suitable for practical engineering applications.
Lifetime Extension of Atmospheric and Suspension Plasma-Sprayed Thermal Barrier Coatings in Burner Rig Tests by Pre-Oxidizing the CoNiCrAlY Bond Coats
Authors: Igel Jens , Scheld Walter Sebastian , Mack Daniel Emil , Guillon Olivier , Vaßen Robert
Published: June 2024

Oxidation of the bond coat during turbine operation leads to additional stresses in the thermal barrier coating (TBC) system that promotes spalling of the thermal insulation. Therefore, the oxidation behavior of a TBC system plays an important role in the thermal cycling of a TBC system. To delay the loss of thermal insulation, research has typically focused for a long time on the composition and microstructure of the ceramic topcoats and metallic bond coats. More recently, heat treatment for the diffusion annealing of the bond coat has also become a focus of research. Several studies have shown that pre-oxidation of the bond coat prior to the application of the ceramic topcoat slows down the subsequent oxidation of the bond coat in service. The improved thermal cyclability has been demonstrated in studies for systems with atmospheric plasma-sprayed (APS), suspension plasma-sprayed (SPS) or electron beam physical vapor deposition (EB-PVD) top coatings. However, no study has directly compared the effects of pre-oxidation on different topcoats. Therefore, this study compared the effect of pre-oxidation on APS and SPS coatings with the same bond coat. For both topcoats, pre-oxidation slowed the subsequent TGO growth and thus increased the lifetime of the coatings. The improvement in lifetime was particularly pronounced for the systems with an SPS topcoat. Overall, the lifetime of the coatings with an APS topcoat was higher as the critical energy release rate within the coating was not exceeded in these coatings.
Wet-Chemical Fabrication of Functional Humidity Sensors on a TiO2-Coated Glass Substrate via UV Photodeposition
Authors: Stefanov Bozhidar I.
Published: June 2024

This work demonstrates a completely wet-chemical procedure for the fabrication of a functional impedimetric humidity-sensing device on a titania (TiO2) surface. Optically transparent anatase TiO2 thin films were deposited on a glass substrate via dip-coating from a titanium tetraisopropoxide (TTIP)–acetylacetonate (AA)-based sol and surface-functionalized with a nickel oxide (NiOx) layer by ultraviolet (UV) photodeposition. Photodeposition was employed to form the interdigitated electrode pattern on the TiO2 surface as well through activation with a silver catalyst to promote electroless copper deposition. The relative humidity (RH) response of the pristine TiO2- and NiOx/TiO2-functionalized sensors was studied by impedance (Z) measurements in the 15%–90% RH range. It was found that while NiOx functionalization significantly dampens the RH–Z functional dependence, it improves its overall linearity and may successfully be employed for the purposeful design of titania-based sensing devices.
Catalytic Activity Evaluation of Molten Salt-Treated Stainless Steel Electrodes for Hydrogen Evolution Reaction in Alkaline Medium
Authors: Fukumoto Michihisa , Takahashi Hiroki , Kutyła Dawid , Wojnicki Marek , Żabiński Piotr
Published: June 2024

The goal of this research is to fabricate a novel type of highly active porous electrode material, based on stainless steel and dedicated to water electrolyzers. The main novelty of the presented work is the innovative application of the molten salts treatment, which allows the design of a highly developed porous structure, which characterizes significantly higher catalytic activity than untreated steel substrates. The equimolar mixture of NaCl and KCl with 3.5 mol% AlF3 was used as the molten salt. The surface modification procedure includes the deposition of an Al layer with application at the potential of −1.8 V and following dissolution at −0.9 V, to create a porous alloy surface. The cathodic polarization measurements of the prepared porous stainless steel electrodes were measured in a 10 mass% KOH solution. Moreover, the amount of hydrogen generated during constant voltage electrolysis with a hydrogen sensor in situ was also measured. The porous stainless steel alloy showed higher current density at lower potentials in the cathodic polarization compared to untreated stainless steel. The cathodic polarization measurements in alkaline solution showed that the porous 304 stainless steel alloy is an excellent cathode material.
Experimental and Adsorption Kinetics Study of Hg0 Removal from Flue Gas by Silver-Loaded Rice Husk Gasification Char
Authors: Yang Ru , Diao Yongfa , Liu Hongbin , Lu Yihang
Published: June 2024

Coal holds a significant position in China’s energy consumption structure. However, the release of Hg0 during coal combustion poses a serious threat to human health. Traditional activated carbon for Hg0 removal is expensive; finding efficient, inexpensive and renewable adsorbents for Hg0 removal has become a top priority. Rice husk gasification char (RHGC) is a solid waste generated by biomass gasification power generation, which, loaded with silver to remove Hg0, could achieve the purpose of waste treatment. This paper examines the Hg0 removal performance of silver-loaded rice husk gasification char (SRHGC) under different operating conditions through experimental analysis. This study employed quasi-first-order, quasi-second-order, and internal diffusion kinetics adsorption equations to model the amount of Hg0 removed by SRHGC at different temperatures, thereby inferring the reaction mechanism. The results indicate that Hg0 removal efficiency of SRHGC increased by about 80%. The Hg0 removal ability was directly related to silver load, and the amount of Hg0 removed by SRHGC did not a exhibit a simple inverse relationship with particle size. Additionally, the Hg0 removal efficiency of SRHGC declined with increasing adsorption temperature. The removal of Hg0 by SRHGC conformed to the quasi-second-order kinetic equation, with the adsorption rate constant decreasing as the temperature rose, consistent with experimental observations. This paper provides both experimental and theoretical references for future modification and optimization of RHGC for coal-fired flue gas treatment, and also offers valuable insights into Hg0 removal by carbon-based adsorbents.
Research on Drag Reduction by Coating the Inner Wall of Hydraulic Pipeline
Authors: Wang Xue , Zhou Junjie , Liao Wenbo , Yuan Shihua
Published: June 2024

This study employs computational fluid dynamics (CFD) simulations to investigate the effect of wall roughness on linear loss in circular pipelines. It specifically addresses hemispherical roughness, focusing on how changes in spacing influence linear loss, a critical determinant of fluid motion within pipelines. The simulations further assess the impact of these variables on flow characteristics, laying a theoretical groundwork for drag reduction and pipeline design improvement. Results indicate that increased spacing between roughness elements reduces the differential pressure at both pipeline ends. The dimensionless spacing value of 30 stabilizes this pressure, suggesting a limit to further changes. Additionally, a rise in roughness height at this spacing exacerbates differential pressure, highlighting a proportional relationship between roughness dimensions and linear loss—greater roughness leads to higher linear loss. Applying a nickel-plated coating on the inner wall significantly lowers roughness, thereby reducing linear loss.
BaTiO3—Gd3Fe5O12 Composites: Exploring the Dielectric Properties in a Broad Frequency Range
Authors: Melo Bruno M. G. , Baivier Clara , Benzerga Ratiba , Fasquelle Didier , Teixeira S. Soreto , Graça Manuel P. F. , Costa Luís
Published: June 2024

This study presents the dielectric properties of a barium titanate–gadolinium ferrite composite material, obtained through a solid-state reaction method. The aim of this research was to create a composite material with enhanced dielectric properties compared to each individual component, and to investigate the electrical properties of the composites, using impedance spectroscopy. The structural and morphologic properties were analyzed using X-ray diffraction and scanning electron microscopy, respectively. Impedance spectroscopy measurements were performed over a wide frequency range (100–0.1 GHz) and temperature (45–170 °C) to evaluate the electrical behavior of the material. The dielectric relaxations were analyzed using the Havriliak–Negami function, and the key electrical parameters such as relaxation frequency, dielectric strength, and electrical conductivity were extracted. Several relaxation processes were identified, which depend on the mixture of the initial titanate and ferrite materials, and a correlation between structural, morphologic, and electrical properties was exposed. The sample with the highest dielectric constant was the 25 wt% gadolinium ferrite composite, with ε′ close to 240 and loss tangent values below 0.1, affording it the more appropriate composition for energy storage devices such as lead-free dielectric capacitors.
Hybrid Explainable Artificial Intelligence Models for Targeted Metabolomics Analysis of Diabetic Retinopathy
Authors: Yagin Fatma Hilal , Colak Cemil , Algarni Abdulmohsen , Gormez Yasin , Guldogan Emek , Ardigò Luca Paolo
Published: June 2024

Background: Diabetic retinopathy (DR) is a prevalent microvascular complication of diabetes mellitus, and early detection is crucial for effective management. Metabolomics profiling has emerged as a promising approach for identifying potential biomarkers associated with DR progression. This study aimed to develop a hybrid explainable artificial intelligence (XAI) model for targeted metabolomics analysis of patients with DR, utilizing a focused approach to identify specific metabolites exhibiting varying concentrations among individuals without DR (NDR), those with non-proliferative DR (NPDR), and individuals with proliferative DR (PDR) who have type 2 diabetes mellitus (T2DM). Methods: A total of 317 T2DM patients, including 143 NDR, 123 NPDR, and 51 PDR cases, were included in the study. Serum samples underwent targeted metabolomics analysis using liquid chromatography and mass spectrometry. Several machine learning models, including Support Vector Machines (SVC), Random Forest (RF), Decision Tree (DT), Logistic Regression (LR), and Multilayer Perceptrons (MLP), were implemented as solo models and in a two-stage ensemble hybrid approach. The models were trained and validated using 10-fold cross-validation. SHapley Additive exPlanations (SHAP) were employed to interpret the contributions of each feature to the model predictions. Statistical analyses were conducted using the Shapiro–Wilk test for normality, the Kruskal–Wallis H test for group differences, and the Mann–Whitney U test with Bonferroni correction for post-hoc comparisons. Results: The hybrid SVC + MLP model achieved the highest performance, with an accuracy of 89.58%, a precision of 87.18%, an F1-score of 88.20%, and an F-beta score of 87.55%. SHAP analysis revealed that glucose, glycine, and age were consistently important features across all DR classes, while creatinine and various phosphatidylcholines exhibited higher importance in the PDR class, suggesting their potential as biomarkers for severe DR. Conclusion: The hybrid XAI models, particularly the SVC + MLP ensemble, demonstrated superior performance in predicting DR progression compared to solo models. The application of SHAP facilitates the interpretation of feature importance, providing valuable insights into the metabolic and physiological markers associated with different stages of DR. These findings highlight the potential of hybrid XAI models combined with explainable techniques for early detection, targeted interventions, and personalized treatment strategies in DR management.
Clinical Pathological and Immunohistochemical Correlations in Gastric Cancer
Authors: Andronic Mihaela , Scripcariu Dragoș-Viorel , Palaghia Mădălina Maria , Trofin Ana-Maria , Bejan Valentin , Scripcariu Viorel
Published: June 2024

Due to its high aggressiveness and polyclonal tumor state, stomach cancer is considered a severe health problem. In this study, we analyzed Her2 and Ki67 in correlation with patient data for the possibility of prognostic factors. The study included 48 cases of gastric tumors that had been surgically treated in a period of five years. The percentage was statistically significant for intestinal-type adenocarcinomas located in the medio-gastric region (p = 0.05); in the diffuse subtype, there were no Her2 positive samples, and in the mixed subtype only one out of three samples was Her2 positive. Our results confirm the existing data, and we can conclude that this link can be considered a prognostic factor in the progression and treatment effectiveness.
The Role of SPECT/CT and PET/CT Hybrid Imaging in the Management of Ectopic Thyroid Carcinoma—A Systematic Review
Authors: Peștean Claudiu , Pavel Alexandru , Piciu Doina
Published: June 2024

Background and Objectives: Thyroid ectopy represents a rare disease with an incidence of 0.3–1/100,000. It occurs due to the defective embryological process of the thyroid gland development. The thyroid ectopic tissue may suffer malignant transformation. This review aims to shed light on the roles that I-131 SPECT/CT (radioiodine 131 single-photon emission tomography fused with computed tomography) and F-18 PET/CT (fluorodeoxyglucose F18 positron emission tomography fused with computer tomography) may play in managing patients with ectopic thyroid carcinoma. Materials and Methods: A total number of 47 articles were identified on the PubMed and Google Scholar databases, and 3 other articles were selected from articles identified in the references cited in the retrieved articles. After refining the selection, the inclusion and exclusion criteria were applied, resulting in 10 articles that were included in the review. Results: The cases of ectopy included in this review were localised as follows: four cases in the thyroglossal duct, two cases in the mediastinum, one case in the oesophagus, one case in the thorax, one case with a pre-tracheal location, and one case with a latero-cervical location. In all the cases, F-18 FDG PET/CT was used as a diagnostic tool. In one case, F-18 FDG PET/CT was combined with I-131 SPECT/CT and MRI (magnetic resonance imaging). In one case, it was combined with 68 Ga-FAPI PET/CT (Ga-68 radiolabelled FAP inhibitor positron emission tomography fused with computer tomography). The maximum SUVs (standardised uptake values) ranged from 5.5 to 25 g/mL. Conclusions: F-18 PET/CT and I-131 SPECT/CT hybrid nuclear imaging is of great value in assessing ectopic thyroid carcinoma. F-18 FDG PET/CT plays an important role in the primary tumour evaluation and distant disease detection. Ga-68 FAPIs are a promising alternative. I-131 SPECT/CT adds important information related to the anatomical characterization of primary and distant iodine-avid lesions.
Spatial and Temporal Dynamics of Chikungunya Incidence in Brazil and the Impact of Social Vulnerability: A Population-Based and Ecological Study
Authors: de Jesus Santos Thiago , de Araújo Karina Conceição Gomes Machado , Góes Marco Aurélio de Oliveira , Bezerra-Santos Marcio , Ribeiro Caíque Jordan Nunes , dos Santos Allan Dantas , Camargo Emerson Lucas Silva , Souza Regina Claudia Silva , Mendes Isabel Amélia Costa , Sousa Alvaro Francisco Lopes de , da Conceição Araújo Damião
Published: June 2024

To assess the temporal and spatial dynamics of chikungunya incidence and its association with social vulnerability indicators in Brazil, an ecological and population-based study was conducted herein, with confirmed cases of chikungunya and based on clinical and clinical–epidemiological criteria from 2017 to 2023. Data were obtained from the Notifiable Diseases Information System and social vulnerability indicators were extracted from the official platform of the United Nations Development Program and the Social Vulnerability Atlas. Temporal, spatial, and global spatial regression models were employed. The temporal trend showed that in 2017, the incidence increased by 1.9%, and this trend decreased from 2020 to 2021 (−0.93%). The spatial distribution showed heterogeneity and positive spatial autocorrelation (I: 0.71; p < 0.001) in chikungunya cases in Brazil. Also, the high-risk areas for the disease were concentrated in the northeast and north regions. The social vulnerability indicators associated with the outcome were those related to income, education, and housing conditions. Our analyses demonstrate that chikungunya continues to be a serious health concern in Brazil, but specially in the northeast and north regions. Lastly, mapping risk areas can provide evidence for the development of public health strategies and disease control in endemic regions.
A Novel Folding Wireless Charging Station Design for Drones
Authors: Ağçal Ali , Doğan Tuğba Halime
Published: June 2024

Unmanned aerial vehicles (UAV) have been used in many fields nowadays. In long-term applications, batteries need to be constantly changed by someone due to short battery life. This problem is eliminated with wireless power transfer (WPT). A reliable, effective, and autonomous solution is offered using wireless charging. The most suitable wireless charging technique for UAVs is inductive power transfer (IPT). In this paper, a novel foldable coil and charge station design is proposed for the wireless charging of UAVs. IPT is provided by receiver and transmitter coils placed on the drone legs and the charging station, respectively. Receiver coils are placed on both legs of the UAV in a light and balanced manner to avoid creating imbalance and weight on the UAV. Receiver coils are designed as vertical rectangular planar spirals. A transmitter coil consists of three rectangular planar spiral coils with two movable edge windings and a fixed middle winding. The transmitter’s folding windings provide both alignments for the UAV during landing and increase the magnetic coupling. A folding wireless charge system of the UAV is designed for 100 W output power at a 138.1 kHz frequency. The misalignment tolerance of the proposed design in the vertical axis is examined. The design’s magnetic flux density distribution is analysed. As an experimental result of the study, 97.66% efficiency was reached in the aligned condition. Also, over 85.48% efficiency was achieved for up to 10 cm of vertical alignment misalignment.
Drone-Based Measurement of the Size Distribution and Concentration of Marine Aerosols above the Great Barrier Reef
Authors: Eckert Christian , Hernandez-Jaramillo Diana C. , Medcraft Chris , Harrison Daniel P. , Kelaher Brendan P.
Published: June 2024

Marine aerosol particles can act as cloud condensation nuclei and influence the atmospheric boundary layer by scattering solar radiation. The interaction of ocean waves and coral reefs may affect the distribution and size of marine aerosol particles. Measuring this effect has proven challenging. Here, we tested the hypothesis that the distribution and size of marine aerosol particles would vary over three distinct zones (i.e., coral lagoon, surf break, and open water) near One Tree Island in the Great Barrier Reef, which is approximately 85 km off the east coast of Australia. We used a modified DJI Agras T30 drone fitted with a miniaturised scanning electrical mobility sizer and advanced mixing condensation particle counter to collect data on aerosol size distribution between 30 and 300 nm at 20 m above the water surface. We conducted 30 flights over ten days during the Austral summer/autumn of 2023. The fitted bimodal lognormal curves indicate that the number concentrations for aerosols below 85 nm diameter are more than 16% higher over the lagoon than over open water. The average mean mode diameters remained constant across the different zones, indicating no significant influence of breaking waves on the detected aerosol size modes. The most influential explanatory variable for aerosol size distribution was the difference between air temperature and the underlying sea surface, explaining around 40% of the variability. Salinity also exhibited a significant influence, explaining around 12% of the measured variability in the number concentration of aerosols throughout the campaign. A calculated wind stress magnitude did not reveal significant variation in the measured marine aerosol concentrations. Overall, our drone-based aerosol measurements near the water surface effectively characterise the dynamics of background marine aerosols around One Tree Island Reef, illustrating the value of drone-based systems for providing size-dependent aerosol information in difficult-to-access and environmentally sensitive areas.
Partial Discharge Fault Diagnosis in Power Transformers Based on SGMD Approximate Entropy and Optimized BILSTM
Authors: Shang Haikun , Zhao Zixuan , Li Jiawen , Wang Zhiming
Published: June 2024

Partial discharge (PD) fault diagnosis is of great importance for ensuring the safe and stable operation of power transformers. To address the issues of low accuracy in traditional PD fault diagnostic methods, this paper proposes a novel method for the power transformer PD fault diagnosis. It incorporates the approximate entropy (ApEn) of symplectic geometry mode decomposition (SGMD) into the optimized bidirectional long short-term memory (BILSTM) neural network. This method extracts dominant PD features employing SGMD and ApEn. Meanwhile, it improves the diagnostic accuracy with the optimized BILSTM by introducing the golden jackal optimization (GJO). Simulation studies evaluate the performance of FFT, EMD, VMD, and SGMD. The results show that SGMD–ApEn outperforms other methods in extracting dominant PD features. Experimental results verify the effectiveness and superiority of the proposed method by comparing different traditional methods. The proposed method improves PD fault recognition accuracy and provides a diagnostic rate of 98.6%, with lower noise sensitivity.
Brake Segment for Agglomeration Policy: Engineers as Human Capital
Authors: Kuchiki Akifumi
Published: June 2024

A “segment” is a component of the organization of an agglomeration. The organization of agglomeration is formed by the construction of segments. Manufacturing agglomeration segments can be divided into four main categories: human resources including engineers, physical infrastructure, institutions, and living environment. Each segment then has a specific function in the process of building industrial agglomeration. We focus on the process of building segments in agglomeration formation. We define a “brake segment” as a segment that has a “function” to decelerate the speed of the process. The purpose of this paper is to identify the existence of this brake segment in the process of constructing the segments of the manufacturing agglomeration. We obtained the following three results. First, a modified version of the spatial economic model yields that the number of agglomerated firms is inversely related to the wages of skilled workers. Second, a factor analysis of the data on investment environment costs indicates that in the case of the manufacturing industry, the number of agglomerated firms are inversely related to the wages of engineers. Third, the factor analysis of the six countries in the JBIC survey reveals that the segment that poses the investment issue in foreign direct investment in India is engineers as human capital. We conclude that engineers as human capital are a brake segment. The implication is that the sustained development of “engineers” as human capital is essential for the success of manufacturing industry agglomeration.
Market Reactions to U.S. Financial Indices: A Comparison of the GFC versus the COVID-19 Pandemic Crisis
Authors: Agatón Lombera Dante Iván , Cardoso López Diego Andrés , López Cabrera Jesús Antonio , Nuñez Mora José Antonio
Published: June 2024

This study delves into the impacts of the 2008 global financial crisis (GFC) and the COVID-19 health crisis on U.S. financial indices, exploring the intricate relationship between economic shocks and these indices during downturns. Using Markov switching regression models and control variables, including GDP, consumer sentiment, industrial production, and the ratio of inventories-to-sale, it quantifies the effects of these crises on the CBOE Volatility Index (VIX), Standard & Poor’s 500 (S&P 500), and the Dow Jones Industrial Average (DJIA) from Q1 2000 to Q2 2023, covering crucial moments of both crises and stable periods (dichotomous variables). Results reveal that the 2008 crisis significantly heightened financial volatility and depreciated the valuation of S&P 500 and DJIA indicators, while the COVID-19 crisis had a diverse impact on market dynamics, particularly negatively affecting specific sectors. This study underscores the importance of consumer confidence and inventory management in mitigating financial volatility and emphasises the need for robust policy measures to address economic shocks, enhance financial stability, and alleviate future crises, especially during endogenous crises such as financial downturns. This research sheds light on the nuanced impact of crises on financial markets and the broader economy, revealing the intricate dynamics shaping market behaviour during turbulent times.
Exploratory Study on the Competencies in Sustainability of Secondary School Students Facing Conflicts Associated with ‘Fast Fashion’
Authors: Banos-González Isabel , Esteve-Guirao Patricia , Ruiz-Navarro Ana , García-Fortes María Ángeles , Valverde-Pérez Magdalena
Published: June 2024

This exploratory study analyses the level of the development of the eight key competencies in sustainability of 237 students in the 7th–10th grades, when confronted with a real conflict situation associated with the production and consumption of ‘fast fashion’. Their responses were categorised into four levels, representing the degree of development of each competence. The results reflect a low level of competence development, with no significant differences among academic year groups. The competence where the highest level of development was reached was the inter-personal competence, as students recognised that the consumption of fast fashion contributes to the labour exploitation of others. However, this did not prompt students to question the prevailing consumerist values in our society (values-thinking competence), their own practises (implementation competence), or their own contribution to the problem (intra-personal competence). Therefore, it seems necessary to address different socio-environmental issues, critically analyse our daily actions, and thus promote these competencies in sustainability in schools. These will enable students to actively participate in environmental conservation from the perspective of environmental and social justice.
Cultivating Creativity and Improving Coding Skills in Primary School Students via Domain-General and Domain-Specific Learning Scaffoldings
Authors: Su Shih-Wen , Chen Li-Xian , Yuan Shyan-Ming , Sun Chuen-Tsai
Published: June 2024

The transformative wave of generative AI is reshaping the creative thinking processes of learners, posing a significant challenge to education and industry in cultivating technological literacy and creativity. This study delves into the exploration of how learners can effectively tackle new challenges by deconstructing fragments from a macro perspective and generating innovative methods or concepts. In the Scratch visual programming environment, learners in the self-regulated learning mode observed entire functioning projects, facilitating easy disassembly and learning, namely by using Code Decomposed by Learner (CDBL). A total of 104 fifth-grade students were divided into two learning scaffoldings: (1) domain-general, learning from the top down (CDBL-TD), and (2) domain-specific, learning from the bottom up (CDBL-BU). Students in the CDBL-TD group exhibited a high degree of completion, strong exploration abilities, and the willingness to experiment with unlearned functions. Although there was no significant difference in originality between the two groups, students in the CDBL-TD group showcased greater uniqueness in designing characters or items within the game. This study introduces a novel programming learning scaffolding, offering instructors a tool to guide students’ creativity and enhance their programming capabilities.