bluuebunny/crossref_metadata_2025 huggingface dataset:
Fe(III) Biomineralization in the Surface Microlayer of Acid Mine Waters Catalyzed by Neustonic Fe(II)-Oxidizing Microorganisms
Authors: Sánchez-España Javier , Ilin Andrey M. , Yusta Iñaki , van der Graaf Charlotte M. , Sánchez-Andrea Irene
Published: April 2023

The formation of thin mineral films or encrustations floating on the water surface of low-flow or stagnant zones of acid mine drainage (AMD)-affected streams is probably among the most exotic features that can be found in mining areas. However, most fundamental questions about their origin (biotic vs. abiotic), structure, mineralogy, physical stability and metal-retention capacity remain unanswered. This study aims to reveal the factors promoting their formation and to clarify their composition in detail. With this purpose, the major mineral phases were studied with XRD in surface film samples found in different mine sites of the Iberian Pyrite Belt mining district (SW Spain), and the major oxide and trace metal concentrations were measured with XRF and/or ICP-MS. Fe(III) minerals dominated these formations, with mineralogy controlled by the pH (jarosite at pH~2.0, schwertmannite at pH 2.5–3.5, ferrihydrite at pH > 6.0). Other minerals have also been identified in minor proportions, such as brushite or khademite. These mineral formations show an astounding capacity to concentrate, by orders of magnitude (×102 to ×105), many different trace metals present in the underlying aqueous solutions, either as anionic complexes (e.g., U, Th, As, Cr, V, Sb, P) or as divalent metal cations (e.g., Cu, Zn, Cd, Pb). These floating mineral films are usually formed in Fe(II)-rich acidic waters, so their formation necessarily implies the oxidation of Fe(II) to Fe(III) phases. The potential involvement of Fe(II)-oxidizing microorganisms was investigated through 16S rRNA gene amplicon sequencing of water underneath the Fe(III)-rich floating mineral films. The sequenced reads were dominated by Ferrovum (51.7 ± 0.3%), Acidithiobacillus (18.5 ± 0.9%) and Leptospirillum (3.3 ± 0.1%), three well-known Fe(II)-oxidizing genera. These microorganisms are major contributors to the formation of the ferric mineral films, although other genera most likely also play a role in aspects such as Fe(III) sequestration, nucleation or mineral growth. The floating mineral films found in stagnant acidic mine waters represent hotspots of biosphere/hydrosphere/atmosphere interactions of great value for the study of iron biogeochemistry in redox boundaries.
Degradation of Phenol via an Advanced Oxidation Process (AOP) with Immobilized Commercial Titanium Dioxide (TiO2) Photocatalysts
Authors: Schwarze Michael , Borchardt Steffen , Frisch Marvin L. , Collis Jason , Walter Carsten , Menezes Prashanth W. , Strasser Peter , Driess Matthias , Tasbihi Minoo
Published: April 2023

Four commercial titanium dioxide (TiO2) photocatalysts, namely P25, P90, PC105, and PC500, were immobilized onto steel plates using a sol-gel binder and investigated for phenol degradation under 365 nm UV-LED irradiation. High-performance liquid chromatography (HPLC) and total organic carbon (TOC) analyses were performed to study the impact of three types of oxygen sources (air, dispersed synthetic air, and hydrogen peroxide) on the photocatalytic performance. The photocatalyst films were stable and there were significant differences in their performance. The best result was obtained with the P90/UV/H2O2 system with 100% degradation and about 70% mineralization within 3 h of irradiation. The operating conditions varied, showing that water quality is crucial for the performance. A wastewater treatment plant was developed based on the lab-scale results and water treatment costs were estimated for two cases of irradiation: UV-LED (about 600 EUR/m3) and sunlight (about 60 EUR/m3). The data show the high potential of immobilized photocatalysts for pollutant degradation under advanced oxidation process (AOP) conditions, but there is still a need for optimization to further reduce treatment costs.
Liquid Biopsies Poorly miRror Renal Ischemia-Reperfusion Injury
Authors: Williams Adaysha C. , Singh Vaishali , Liu Pengyuan , Kriegel Alison J.
Published: April 2023

Acute kidney injury (AKI) is the rapid reduction in renal function. It is often difficult to detect at an early stage. Biofluid microRNAs (miRs) have been proposed as novel biomarkers due to their regulatory role in renal pathophysiology. The goal of this study was to determine the overlap in AKI miRNA profiles in the renal cortex, urine, and plasma samples collected from a rat model of ischemia-reperfusion (IR)-induced AKI. Bilateral renal ischemia was induced by clamping the renal pedicles for 30 min, followed by reperfusion. Urine was then collected over 24 h, followed by terminal blood and tissue collection for small RNA profiling. Differentially expressed (IR vs. sham) miRs within the urine and renal cortex sample types demonstrated a strong correlation in normalized abundance regardless of injury (IR and sham: R2 = 0.8710 and 0.9716, respectively). Relatively few miRs were differentially expressed in multiple samples. Further, there were no differentially expressed miRs with clinically relevant sequence conservation common between renal cortex and urine samples. This project highlights the need for a comprehensive analysis of potential miR biomarkers, including analysis of pathological tissues and biofluids, with the goal of identifying the cellular origin of altered miRs. Analysis at earlier timepoints is needed to further evaluate clinical potential.
Protection of Patient Data in Digital Oral and General Health Care: A Scoping Review with Respect to the Current Regulations
Authors: Di Fede Olga , La Mantia Gaetano , Cimino Mario G. C. A. , Campisi Giuseppina
Published: April 2023

The use of digital health technologies, including telemedicine and teledentistry, has become a necessity in healthcare due to the SARS-CoV-19 pandemic. These technologies allow for the reduction of the workload of healthcare providers and the improvement of patient outcomes in cases of remote monitoring, diagnosis, and communication. While there are no doubtful benefits, there are some counterparts, such as concerns about clinical risks, data security, and privacy protection. This paper aims to review the regulations regarding the use of digital health apps and software in healthcare. This scoping review followed the PRISMA-ScR guidelines and the five-step framework of Arksey and O’Malley. Study selection was based on eligibility criteria that were defined using the population-exposure framework. The review of the articles selected (n = 24) found that the majority focused on data security policies in the healthcare industry, highlighting the need for comprehensive regulations and app control systems to protect patient data. The articles also emphasized the requirement for more appropriate research and policy initiatives to improve data security practices and better address privacy and safety challenges related to health-related apps. The review recognized that papers did not report consistent standards in professional obligation and informed consent in online medical consultations, with potential risks for data privacy, medical liabilities, and ethical issues. Digital health has already revolutionized medical service delivery through technology but faces some challenges, including the lack of standardized protocols for handling sensitive patient data and the absence of common legislative provisions, raising concerns about confidentiality and security. To address these issues and deficiencies, regulatory compliance is crucial to clarify and harmonize regulations and provide guidelines for doctors and the health system. In conclusion, regulating patient data, clarifying provisions, and addressing informed patients are critical and urgent steps in maximizing usage and successful implementation of telemedicine.
Metazoan Marine Parasites of Costa Rica: A Review
Authors: Solano-Barquero Alberto , Rojas Alicia , Cortés Jorge
Published: April 2023

Many new marine parasite species are added every year. Still, in some places, mainly tropical regions, marine parasites have been little studied. An exhaustive review of the indexed publications where species of parasites are reported in the marine environments of Costa Rica was carried out. The history of research on marine parasites in this region is also reviewed. A total of 146 species of marine parasites have been reported in Costa Rica as parasites of 61 different species of hosts. Most of these parasites correspond to trematodes and cestodes, found mainly in the digestive tract of their vertebrate hosts. In Costa Rica, marine parasites have been studied mainly in sea turtles, elasmobranchs, fish, and dolphins. Most marine parasites have been reported based on morphological identifications of adult stages, and most of the work done so far consists of taxonomic identifications (species reports), with little contribution to the pathology and other aspects of the parasites–hosts interactions. The technical difficulties for research in marine parasitology, the lack of sampling in certain groups of hosts, and the lack of a consolidated research group in marine wildlife parasitology in Costa Rica are factors that have prevented a greater and faster advance in the knowledge of the biodiversity of marine parasites in this country.
Molecular Characteristics of Methicillin-Resistant and Susceptible Staphylococcus aureus from Pediatric Patients in Eastern China
Authors: Zhou Yuxuan , Yu Shuyang , Su Chenjun , Gao Shengqi , Jiang Guilai , Zhou Zhemin , Li Heng
Published: April 2023

Staphylococcus aureus is an opportunistic pathogen that causes invasive infections in humans. In recent years, increasing studies have focused on the prevalence of S. aureus infections in adults; however, the epidemiology and molecular characteristics of S. aureus from Chinese pediatric patients remain unknown. The present study examined the population structure, antimicrobial resistance, and virulent factors of methicillin-resistant and -susceptible S. aureus isolated from Chinese pediatric patients from one medical center in eastern China. A total of 81 cases were screened with positive S. aureus infections among 864 pediatric patients between 2016 and 2022 in eastern China. Molecular analysis showed that ST22 (28.4%) and ST59 (13.6%) were the most typical strains, and associations between different clonal complex (CC) types/serotype types (ST) and the age of pediatric patients were observed in this study. CC398 was the predominant type in neonates under 1 month of age, while CC22 was mainly found in term-infant (under 1 year of age) and toddlers (over 1 year of age). Additionally, 17 S. aureus isolates were resistant to at least three antimicrobials and majority of them belonged to CC59. The blaZ gene was found in 59 isolates and mecA gene was present in 26 strains identified as methicillin-resistant. Numerous virulent factors were detected in S. aureus isolated from present pediatric patients. Remarkably, lukF-PV and lukS-PV were dominantly carried by CC22, tsst-1 genes were detected in CC188, CC7, and CC15, while exfoliative toxin genes were found only in CC121. Only 41.98% of the S. aureus isolates possessed scn gene, indicating that the sources of infections in pediatric patients may include both human-to-human transmissions as well as environmental and nosocomial infections. Together, the present study provided a phylogenetic and genotypic comparison of S. aureus from Chinese pediatric patients in Suzhou city. Our results suggested that the colonization of multi-drug resistant isolates of S. aureus may raise concern among pediatric patients, at least from the present medical center in eastern China.
A Systematic Review and Meta-Analysis on Hepatitis E Virus Detection in Farmed Ruminants
Authors: Santos-Silva Sérgio , López-López Pedro , Gonçalves Helena M. R. , Rivero-Juarez António , Van der Poel Wim H. M. , Nascimento Maria São José , Mesquita João R.
Published: April 2023

Swine are widely recognized as the main reservoir of zoonotic HEV; however, a growing body of data on the HEV prevalence in farmed ruminants of different species also points to a potential route for HEV transmission through ruminants and ruminant products and by-products. Definite information on the zoonotic potential of ruminants is still absent or unclear, compelling the necessity for increasing knowledge on this. The aim of the current study was to analyze the state-of-the-art in this research topic and provide a summary of HEV detection and characterization in farmed ruminants. A total of 1567 papers were retrieved from four search databases that resulted in 35 eligible papers after application of exclusion/inclusion criteria. Studies on HEV in farmed ruminants were mainly based on the detection of HEV RNA and were reported in Africa (n = 1), America (n = 3), Asia (n = 18) and Europe (n = 13), and focused on a variety of ruminants species, namely cow, goat, sheep, deer, buffalo and yak. The overall pooled prevalence of HEV was 0.02% (0.01–0.03, 95% CI). The subgroup pooled prevalence of HEV RNA was 0.01% (0.00–0.02, 95% CI) in cow milk, stool, serum, liver, intestinal, bile, blood, spleen and rectal swab samples; 0.09% (0.02–0.18, 95% CI) in goat serum, bile, stool, milk, liver, rectal swab and blood samples; 0.01% (0.00–0.04, 95% CI) in sheep stool, serum, milk, blood and liver samples. Most of the HEV genotypes found in farmed ruminants belonged to the zoonotic HEV-3 (subtypes 3a, 3c) and HEV-4 (subtype 4d, 4h), with Rocahepevirus also found. The wide HEV circulation observed in different farmed ruminants raises concerns for the possibility of HEV transmission through products from infected ruminants and alerts for the potential zoonotic route for HEV in ruminant products, such as meat and dairy products. Also, contact exposure to infected farmed animals could be a risk factor. Further research should be conducted in order to understand the circulation of HEV in these animals and its zoonotic potential, as there is currently a lack of data on this topic.
Investigation into Electromagnetic Compatibility Conducted Susceptibility of a Laser Ranging System
Authors: Huang Peng , Li Bing , Li Weimin , Liao Yi , Su Donglin
Published: April 2023

Laser ranging systems are a widely used form of electronic system and are generally influenced by complex electromagnetic environments. We used a laser ranging system comprising the VL53L0X laser ranging sensor module as the research object and designed a sensitive experimental platform based on the laser ranging system. In this work, we have shown that electromagnetic interference signals can affect the performance of laser ranging systems. The electromagnetic interference signal was found to enter through the chip selection port of the laser sensor chip to affect the work of the laser sensor chip. Finally, we obtained the susceptibility threshold characteristics of the laser ranging system under the influence of different types of interference signal. This study deepens the understanding of the electromagnetic susceptibility mechanism of laser ranging systems and helps in the design of their electromagnetic compatibility.
What Hides in the Heights? The Case of the Iberian Endemism Bromus picoeuropeanus
Authors: González-Toral Claudia , Nava Herminio S. , Fernández Prieto José Antonio , Cires Eduardo
Published: April 2023

Bromus picoeuropeanus is a recently described species belonging to a complex genus of grasses. It inhabits stony soils at heights ranging from 1600 to 2200 m in Picos de Europa (Cantabrian Mountains, northern Spain). This species is morphologically very similar to B. erectus, partially sharing its presumed distribution range. We aim to determine the relationship between these species and their altitudinal ranges in Picos de Europa and the Cantabrian Mountains by conducting phylogenetic analyses based on nuclear (ETS and ITS) and chloroplastic (trnL) markers. Phylogenetic trees were inferred by Maximum Likelihood and Bayesian Inference. Haplotype networks were estimated based on the plastid marker. Although the ITS topologies could not generate exclusive clades for these species, the ETS analyses generated highly supported B. picoeuropeanus exclusive clades, which included locations outside its altitudinal putative range. The ETS-ITS and ETS-ITS-trnL topologies generated B. picoeuropeanus exclusive clades, whereas the trnL-based trees and haplotype networks were unable to discriminate B. erectus and B. picoeuropeanus. This evidence suggests that B. picoeuropeanus is a separate species with a larger distribution than previously thought, opening new questions regarding the evolution of B. erectus and other similar species in European mountainous systems. However, more information is needed regarding B. picoeuropeanus susceptibility to temperature rises.
Exogenous Calcium Reinforces Photosynthetic Pigment Content and Osmolyte, Enzymatic, and Non-Enzymatic Antioxidants Abundance and Alleviates Salt Stress in Bread Wheat
Authors: Sadak Mervat Sh , Hanafy Rania S. , Elkady Fatma M. A. M. , Mogazy Asmaa M. , Abdelhamid Magdi T.
Published: April 2023

One of the main environmental stresses that hinder crop development as well as yield is salt stress, while the use of signal molecules such as calcium (Ca) has a substantial impact on reducing the detrimental effects of salt on different crop types. Therefore, a factorial pot experiment in a completely randomized design was conducted to examine the beneficial role of Ca (0, 2.5, and 5 mM) in promoting the physiological, biochemical, and growth traits of the wheat plant under three salt conditions viz. 0, 30, and 60 mM NaCl. Foliar application of Ca increased the growth of salt-stressed wheat plants through increasing photosynthetic pigments, IAA, proline, and total soluble sugars contents and improving antioxidant enzymes in addition to non-enzymatic antioxidants glutathione, phenol and flavonoids, β-carotene, and lycopene contents, thus causing decreases in the over-accumulation of free radicals (ROS). The application of Ca increased the activity of antioxidant enzymes in wheat plants such as superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT), which scavenge reactive oxygen species (ROS) and relieved salt stress. An additional salt tolerance mechanism by Ca increases the non-antioxidant activity of plants by accumulating osmolytes such as free amino acids, proline, and total soluble sugar, which maintain the osmotic adjustment of plants under salinity stress. Exogenous Ca application is a successful method for increasing wheat plants’ ability to withstand salt stress, and it has a considerable impact on the growth of wheat under salt stress.
Characteristics of Double-Layer, Large-Flow Dielectric Barrier Discharge Plasma Source for Toluene Decomposition
Authors: Xu Mao , Fukuyama Yohei , Nakai Kazuki , Liu Zhizhi , Sumiya Yuki , Okino Akitoshi
Published: April 2023

The direct decomposition of toluene-containing humidified air at large flow rates was studied in two types of reactors with dielectric barrier discharge (DBD) features in ambient conditions. A scalable large-flow DBD reactor (single-layer reactor) was designed to verify the feasibility of large-flow plasma generation and evaluate its decomposition characteristics with toluene-containing humidified air, which have not been investigated. In addition, another large-flow DBD reactor with a multilayer structure (two-layer reactor) was developed as an upscale version of the single-layer reactor, and the scalability and superiority of the features of the multilayer structure were validated by comparing the decomposition characteristics of the two reactors. Consequently, the large-flow DBD reactor showed similar decomposition characteristics to those of the small-flow DBD reactor regarding applied voltage, flow velocity, flow rate, and discharge length, thus justifying the feasibility of large-flow plasma generation. Additionally, the two-layer reactor is more effective than the single-layer reactor, suggesting multilayer configuration is a viable scheme for further upscaled DBD systems. A high decomposition rate of 59.5% was achieved at the considerably large flow rate of 110 L/min. The results provide fundamental data and present guidelines for the implementation of the DBD plasma-based system as a solution for volatile organic compound abatement.
Shredding Roller Effect on the Cannabis sativa L. Residues and Environment
Authors: Naujokienė Vilma , Lekavičienė Kristina , Eigirdas Eimantas , Šarauskis Egidijus
Published: April 2023

Fiber cannabis has been grown in Lithuania for a long time, but its cultivation technologies have not been widely studied. However, the growing population and consumption forces us to look to alternatives and to make efforts and find solutions to facilitate the cultivation of fiber cannabis because the use of fiber cannabis can be for many different types of products. The aim of the study was to evaluate the impact of the interaction of fibrous cannabis (Cannabis sativa L.) residue and soil on the mechanical properties of the residue and the environment in cultivation technology using a shredding roller. The study determined the effect of the shredding roller on the moisture content of cannabis residues, lignin content, visual changes, and mechanical characteristics of breaking and cutting. Examining cannabis residues according to the dominant different diameters of 5-, 8-, and 10-mm organic cannabis residues, it was found that the highest efficiency of the shredding roller is when rolling 5 mm diameter cannabis residue stems. The efficiency of the shredding roller for reducing the mechanical characteristics of cannabis residues and the need for shredding force was up to 20.78%. The results obtained are significant if the cannabis crop used with the shredding roller is organic, as the smallest diameter plant residues would be the most abundant. Studies have concluded that the moisture content of cannabis residues, the visual changes, and the need for crushing force prove the efficiency of the shredding roller, and the cannabis cultivation technology influences the decomposition of cannabis residues.
Influence of Varying Amounts of Alumina (Al2O3) on the Wear Behavior of ZnO, SiO2 and TiO2 Compounds
Authors: Kaya Ali Ihsan
Published: April 2023

This study aimed to exploit the superior properties of TiO2, ZnO, SiO2 and Al2O3 inorganic materials to combine them under pressure and investigate their mechanical properties. The hot pressing technique was used to produce new materials. Varying amounts of alumina such as 0, 5, 10, 20 and 30 wt% in compounds was considered. The produced materials were characterized by SEM, EDS and XRD analyses. The microhardness properties of the materials were studied, and their tribological properties under different wear loads, i.e., 10 N, 20 N and 30 N, were investigated for every specimen. In XRD analysis, it was observed that no significant new peaks were formed regarding increasing alumina content. The SEM and EDS characterization analyses showed that the materials had a two-phase structure with complex boundaries, and no clear grain boundaries were formed. Moreover, the elements in the EDS analyses and the compounds in the XRD analyses were found to be in line with each other. In wear tests, it was seen that as the wear load increased, the depth and width of the wear track increased. The highest weight loss under different wear loads was obtained for the Ti55Si15Zn20Al10 material. It was determined that as the Al2O3 wt% increased over 10 wt%, the weight losses decreased. It was observed that there was an increase in the microhardness value generally depending on the increase of alumina content in compounds.
In Defense of a Just Society: Buber Contra Gandhi on Jewish Migration to Palestine
Authors: Skiles William Stewart
Published: April 2023

Much has been written on Martin Buber’s public response to Mahatma Gandhi’s article “The Jews”, which had been published in the newspaper Harijan in 1938, just after the Nazi pogrom against the Jews known as “Kristallnacht”. I wish to examine more closely Buber’s conception of God’s command to the Jewish people to settle the land of Palestine in a manner that expresses love for their Arab neighbors, seeks harmony and peace in the land, and serves not only the common good among Jews and Arabs but the good of the land itself—that it would be fruitful for all. Central to Buber’s conception of the state of Israel in Palestine—and Jewish settlement more generally—was God’s ancient command that the Jews must establish a just society. The Jews must be faithful, Buber contended, to build a community and state that obeys God’s calling and aligns with their mission to reflect God’s justice in the world. Thus, understanding and harmony between the Jews and Arabs must be integral to the Jews’ approach to Arabs in Palestine, not peripheral to their mission. Buber’s response demonstrates his desire to relate directly and personally to Gandhi, to reveal falsehoods and misunderstandings, and to facilitate a greater awareness of the richness of the Jewish tradition that may be used to benefit the land of Palestine and its peoples. This vision for the Jewish mission deserves more attention in the historiography.
The Current Triple-Type Attributes of and Policy Issues for Christian Social Service Organizations in China: From a Multi-Disciplinary Perspective
Authors: Gao Jianguo , Shi Xiaojie , Wu Xianhong
Published: April 2023

This paper explores the typological attributes, practical characteristics, and policy connotations of Christian social service organizations in present China. This is achieved from the perspectives of religion, public administration, social work, and history. Data collection and analysis are based on the literature research and field research methods. The main points are as follows: (1) Christian social service organizations are simultaneously faith-based organizations, legal-person organizations, and professional organizations. These different types of characteristics put forward different requirements for their service functions and performance standards. It is necessary to understand their corresponding boundaries in theory and coordinate or optimize their corresponding functions in the system; (2) Christian social service organizations present the characteristics of pluralism and transition in the practice process, as well as form complex symbiosis and embedded relationships with non-religious professional service systems. Further, they have begun to reach a consensus on industry codes of practice, service concepts, and clinical models, especially in regard to the culturally sensitive service centered on the clients; and (3) the triple-type attributes of Christian social service organizations require government departments and professional circles to direct more attention to the “matrix” of policy tools—in other words, formulate more discerning and diverse policy measures in line with policy objectives, as well as strengthen the legalization of the policy implementation mechanism and the level of collaborative governance of religious social service organizations.
COVID-19 and Religion
Authors: Heinz Donald
Published: April 2023

The COVID-19 pandemic has produced a social drama in which churches, government, and individual actors have played prominent roles. While neo-conservative evangelicals have resisted governmental and scientific overreach in the name of “faith over fear”, liberal religious groups have joined in government and medical efforts for the good of the commons, offered comfort and assurance to those suffering, and called for support of the poor at home and abroad. Religions have turned right and left, from apocalyptic “resets” of global order to new calls for social justice. In this context, the root metaphor of the epidemic has been called up as a historical construct that helps to conceptualize, analyze, and act upon the COVID-19 crisis. Searching the past helps us see that not everything about COVID-19 as a social drama is a new or unheard-of challenge. For example, there are new evocations of the black death of 14th-century Europe that became a crisis in the church, as well as the great Lisbon earthquake in 1755, which upended the confidence of the European Enlightenment. Another way to appraise the dimensions of the COVID-19 outbreak is to call on the varied approaches characteristic of the sociology of religion, that is, to consider how ideology and belief are socially constructed in order to account for new intellectual responses to societal challenges. Does religion always produce the “collective effervescence” Durkheim posited? Does religious change always arrive downstream of cultural change, or can it also become an independent variable? This article attends primarily to the sharp responses of conservative religious expression in the face of attention-getting upheaval, which has readily translated into right-wing political action and electioneering. But the social uplift and altruism of liberal religion is not neglected either. Thus, this article provides an account of how science and governmental action have both been challenged and embraced in response to COVID-19. As such, it is not an empirical study stemming from new Pew-like social polling. Rather, it is a wide overview rooted in sociological methods and theory for tracking religion historically and presently in America in a manner that aims to inform a discussion of how COVID-19 has impacted religion and religious expression, and vice versa.
Machine Learning Algorithm for Mid-Term Projection of the EU Member States’ Indebtedness
Authors: Zarkova Silvia , Kostov Dimitar , Angelov Petko , Pavlov Tsvetan , Zahariev Andrey
Published: April 2023

The main research question addressed in the paper is related to the possibility of medium-term forecasting of the public debts of the EU member states. The analysis focuses on a broad range of indicators (macroeconomic, fiscal, monetary, global, and convergence) that influence the public debt levels of the EU member states. A machine learning prediction model using random forest regression was approbated with the empirical data. The algorithm was applied in two iterations—a primary iteration with 33 indicators and a secondary iteration with the 8 most significant indicators in terms of their influence and forecasting importance regarding the development of public debt across the EU. The research identifies a change in the medium term (2023–2024) in the group of the four most indebted EU member states, viz., that Spain will be replaced by France, which is an even more systemic economy, and will thus increase the group’s share of the EU’s GDP. The results indicate a logical scenario of rising interest rates with adverse effects for the fiscal imbalances, which will require serious reforms in the public sector of the most indebted EU member states.
Heart Rate as a Predictor of Challenging Behaviours among Children with Autism from Wearable Sensors in Social Robot Interactions
Authors: Alban Ahmad Qadeib , Alhaddad Ahmad Yaser , Al-Ali Abdulaziz , So Wing-Chee , Connor Olcay , Ayesh Malek , Ahmed Qidwai Uvais , Cabibihan John-John
Published: April 2023

Children with autism face challenges in various skills (e.g., communication and social) and they exhibit challenging behaviours. These challenging behaviours represent a challenge to their families, therapists, and caregivers, especially during therapy sessions. In this study, we have investigated several machine learning techniques and data modalities acquired using wearable sensors from children with autism during their interactions with social robots and toys in their potential to detect challenging behaviours. Each child wore a wearable device that collected data. Video annotations of the sessions were used to identify the occurrence of challenging behaviours. Extracted time features (i.e., mean, standard deviation, min, and max) in conjunction with four machine learning techniques were considered to detect challenging behaviors. The heart rate variability (HRV) changes have also been investigated in this study. The XGBoost algorithm has achieved the best performance (i.e., an accuracy of 99%). Additionally, physiological features outperformed the kinetic ones, with the heart rate being the main contributing feature in the prediction performance. One HRV parameter (i.e., RMSSD) was found to correlate with the occurrence of challenging behaviours. This work highlights the importance of developing the tools and methods to detect challenging behaviors among children with autism during aided sessions with social robots.
A Sequential Electrospinning of a Coaxial and Blending Process for Creating Double-Layer Hybrid Films to Sense Glucose
Authors: Du Yutong , Yang Zili , Kang Shixiong , Yu Deng-Guang , Chen Xiren , Shao Jun
Published: April 2023

This study presents a glucose biosensor based on electrospun core–sheath nanofibers. Two types of film were fabricated using different electrospinning procedures. Film F1 was composed solely of core–sheath nanofibers fabricated using a modified coaxial electrospinning process. Film F2 was a double-layer hybrid film fabricated through a sequential electrospinning and blending process. The bottom layer of F2 comprised core–sheath nanofibers fabricated using a modified process, in which pure polymethacrylate type A (Eudragit L100) was used as the core section and water-soluble lignin (WSL) and phenol were loaded as the sheath section. The top layer of F2 contained glucose oxidase (GOx) and gold nanoparticles, which were distributed throughout the polyvinylpyrrolidone K90 (PVP K90) nanofibers through a single-fluid blending electrospinning process. The study investigated the sequential electrospinning process in detail. The experimental results demonstrated that the F2 hybrid film had a higher degradation efficiency of β-D-glucose than F1, reaching a maximum of over 70% after 12 h within the concentration range of 10–40 mmol/L. The hybrid film F2 is used for colorimetric sensing of β-D-glucose in the range of 1–15 mmol/L. The solution exhibited a color that deepened gradually with an increase in β-D-glucose concentration. Electrospinning is flexible in creating structures for bio-cascade reactions, and the double-layer hybrid film can provide a simple template for developing other sensing nanomaterials.
Integrated Filter Design for Analog Field Mill Sensor Interface
Authors: Agorastou Zoi , Michailidis Anastasios , Lemonou Aikaterini , Themeli Rafaela , Noulis Thomas , Siskos Stylianos
Published: April 2023

The design process of an integrated bandpass filter targeted for the noise filtering stage of the synchronous demodulation unit of an electric field mill sensor interface is presented. The purpose of this study of filter integration techniques is to avoid the challenging and, in some cases, impossible passive element integration process and to incorporate the final filter design in an entirely integrated field mill sensing system with superior performance and an optimized silicon-to-cost ratio. Four different CMOS filter implementations in the 0.18 μm process of XFAB, using OTA (Operational Transconductance Amplifier)-based configurations for passive element replacement in cascaded filter topologies and leapfrog techniques, are compared in terms of noise performance, total harmonic distortion, dynamic range, and power consumption, as well as in terms of integrability, silicon area, and performance degradation at process corners/mismatches. The optimum filter design performance-wise and process-wise is included in the final design of the integrated analog readout of a field mill sensor, and post-layout simulation results of the total circuit are presented.
An Improved YOLOv5-Based Underwater Object-Detection Framework
Authors: Zhang Jian , Zhang Jinshuai , Zhou Kexin , Zhang Yonghui , Chen Hongda , Yan Xinyue
Published: April 2023

To date, general-purpose object-detection methods have achieved a great deal. However, challenges such as degraded image quality, complex backgrounds, and the detection of marine organisms at different scales arise when identifying underwater organisms. To solve such problems and further improve the accuracy of relevant models, this study proposes a marine biological object-detection architecture based on an improved YOLOv5 framework. First, the backbone framework of Real-Time Models for object Detection (RTMDet) is introduced. The core module, Cross-Stage Partial Layer (CSPLayer), includes a large convolution kernel, which allows the detection network to precisely capture contextual information more comprehensively. Furthermore, a common convolution layer is added to the stem layer, to extract more valuable information from the images efficiently. Then, the BoT3 module with the multi-head self-attention (MHSA) mechanism is added into the neck module of YOLOv5, such that the detection network has a better effect in scenes with dense targets and the detection accuracy is further improved. The introduction of the BoT3 module represents a key innovation of this paper. Finally, union dataset augmentation (UDA) is performed on the training set using the Minimal Color Loss and Locally Adaptive Contrast Enhancement (MLLE) image augmentation method, and the result is used as the input to the improved YOLOv5 framework. Experiments on the underwater datasets URPC2019 and URPC2020 show that the proposed framework not only alleviates the interference of underwater image degradation, but also makes the mAP@0.5 reach 79.8% and 79.4% and improves the mAP@0.5 by 3.8% and 1.1%, respectively, when compared with the original YOLOv8 on URPC2019 and URPC2020, demonstrating that the proposed framework presents superior performance for the high-precision detection of marine organisms.
Thin and Scalable Hybrid Emission Filter via Plasma Etching for Low-Invasive Fluorescence Detection
Authors: Rustami Erus , Sasagawa Kiyotaka , Sugie Kenji , Ohta Yasumi , Takehara Hironari , Haruta Makito , Tashiro Hiroyuki , Ohta Jun
Published: April 2023

Hybrid emission filters, comprising an interference filter and an absorption filter, exhibit high excitation light rejection performance and can act as lensless fluorescent devices. However, it has been challenging to produce them in large batches over a large area. In this study, we propose and demonstrate a method for transferring a Si substrate, on which the hybrid filter is deposited, onto an image sensor by attaching it to the sensor and removing the substrate via plasma etching. Through this method, we can transfer uniform filters onto fine micrometer-sized needle devices and millimeter-sized multisensor chips. Optical evaluation reveals that the hybrid filter emits light in the 500 to 560 nm range, close to the emission region of green fluorescent protein (GFP). Furthermore, by observing the fluorescence emission from the microbeads, a spatial resolution of 12.11 μm is calculated. In vitro experiments confirm that the fabricated device is able to discriminate GFP emission patterns from brain slices.
Feature Papers in Optical Sensors 2022
Authors: Passaro Vittorio M. N. , Semenova Yuliya , Miller Benjamin L.
Published: April 2023

Today, optical sensors are the subject of a very significant number of studies and applications [...]
Privacy Preservation in Smart Meters: Current Status, Challenges and Future Directions
Authors: Kua Jonathan , Hossain Mohammad Belayet , Natgunanathan Iynkaran , Xiang Yong
Published: April 2023

Recent years have seen the rapid development of technologies in Smart Grids (SGs) to enhance electricity networks with digital and data communication technologies. SGs can proactively detect, react, and respond to dynamic changes in the network. SGs can also enhance the efficiency and reliability of electricity supplies and promote the integration of renewable energy sources. Smart Meters (SMs) are often seen as the first step to a successful implementation of SGs. While SMs enable Utility Providers and consumers to obtain near real-time information of energy consumption, they can also be exploited to infer sensitive consumer data. Therefore, privacy preservation in SMs is paramount in ensuring the widespread and successful deployment of SGs. In this paper, we present a comprehensive survey of the state-of-the-art SM privacy-preserving techniques published in the literature over the past decade. We categorize these techniques based on the attack types and their objectives. We aim to offer a unique perspective in this survey article through the lens of privacy preservation, cross-cutting the wide range of techniques presented in the literature. We conclude by identifying the challenges and highlighting key future research directions in the field.
Dynamic Speed of Sound Adaptive Transmission–Reflection Ultrasound Computed Tomography
Authors: Lin Xiangwei , Shi Hongji , Fu Zhenyu , Lin Haoming , Chen Siping , Chen Xin , Chen Mian
Published: April 2023

Ultrasound computed tomography (USCT) can visualize a target with multiple imaging contrasts, which were demonstrated individually previously. Here, to improve the imaging quality, the dynamic speed of sound (SoS) map derived from the transmission USCT will be adapted for the correction of the acoustic speed variation in the reflection USCT. The variable SoS map was firstly restored via the optimized simultaneous algebraic reconstruction technique with the time of flights selected from the transmitted ultrasonic signals. Then, the multi-stencils fast marching method was used to calculate the delay time from each element to the grids in the imaging field of view. Finally, the delay time in conventional constant-speed-assumed delay and sum (DAS) beamforming would be replaced by the practical computed delay time to achieve higher delay accuracy in the reflection USCT. The results from the numerical, phantom, and in vivo experiments show that our approach enables multi-modality imaging, accurate target localization, and precise boundary detection with the full-view fast imaging performance. The proposed method and its implementation are of great value for accurate, fast, and multi-modality USCT imaging, particularly suitable for highly acoustic heterogeneous medium.
Aqueous 2-Ethyl-4-methylimidazole Solution for Efficient CO2 Separation and Purification
Authors: Zhang Xingtian , Wu Jun , Lu Xiaoxiao , Yang Yefeng , Gu Li , Cao Xuebo
Published: April 2023

Carbon capture and storage (CCS) technology is considered as one of the most effective short-term solutions in reducing atmospheric CO2 concentrations. A key of CCS technology is to seek the absorbent with low cost, fast absorption rate, and high stability. In this study, we show that 2-ethyl-4-methylimidazole is particularly suitable for efficient CO2 capture. The aqueous solution of 2-ethyl-4-methylimidazole displays a maximum CO2 molar absorption capacity of 1.0 mol∙mol−1 and the absorbed CO2 can be completely released through heating the solution at a relatively low temperature (<100 °C). Stability tests show that the aqueous system is quite stable, with less than 10% loss of the molar absorption capacity after eight absorption–desorption cycles. Time-related in-situ attenuated total reflection infrared absorption spectroscopy and 13C nuclear magnetic resonance spectroscopy studies reveal that the intermediates are HCO3− and H2CO3 in the process of CO2 absorption–desorption. These intermediates are easily decomposed, which are responsible for the low CO2 desorption temperature and high desorption efficiency of the system. Moreover, the aqueous solution of 2-ethyl-4-methylimidazole is able to separate and purify CO2 from flue gas and even ambient air. Consequently, 2-ethyl-4-methylimidazole is a promising low-cost CO2 absorbent for industrial implementation.
‘Nothing Gets Realised Anyway’: Adolescents’ Experience of Co-Creating Health Promotion Measures in Municipalities in Norway
Authors: Sylte Mari , Lillefjell Monica , Aasan Bodil Elisabeth Valstad , Anthun Kirsti Sarheim
Published: April 2023

In this study, we aimed to explore how adolescents experience co-creating health promotion measures in four municipalities in Norway. We applied a qualitative design with group interviews (n = 9) among forty-nine adolescents participating in projects related to ‘Program for Public Health Work in Municipalities’ (2017–2027). Additionally, participatory observation of project activities was performed in two municipalities. We conducted a data-driven thematic analysis to analyse the data. The most prominent finding was that the adolescents often expressed feelings of resignation and dissatisfaction. Furthermore, we identified four underlying reasons behind the resignation and dissatisfaction. These were related to long project duration, the experience of not having an influence on the outcome, promises not being kept and lack of information and continuity in their participation. Essential features for meaningful participation were not present, and the findings suggest that the municipalities had limited success in facilitating participation that adolescents perceived as meaningful. The findings indicate that despite good intentions and policies supporting children’s participation, effort placed on implementing such policies in practice is still needed. This study adds knowledge regarding important factors to consider when involving young people in co-creating measures to avoid unintended effects such as disempowering adolescents.
The Relative Importance of Family, School, and Leisure Activities for the Mental Wellbeing of Adolescents: The Young-HUNT Study in Norway
Authors: Aasan Bodil , Lillefjell Monica , Krokstad Steinar , Sylte Mari , Sund Erik
Published: April 2023

It is well-known that the social environment in which children and adolescents live and grow has an impact on their mental wellbeing, though the relative importance of different social contexts may vary. In the present study, we used data from the Young-HUNT4 survey in Norway (n = 8066, age range 13 to 19 years). Linear regression models were used to investigate the relative importance of family cohesion, school climate, and number of leisure activities on psychological distress, loneliness, and life dissatisfaction among Norwegian adolescents by investigating whether the strength of association varied across social contexts for the three outcomes. Additionally, analyses were stratified by parental education to investigate whether the relative importance of family, school, and leisure activities differed between adolescents from families with low and high parental education. We found that family cohesion showed the strongest association with all three outcomes, followed by the school climate and number of leisure activities. Generally, these associations did not vary significantly between low and high parental education. Understanding the relative importance of social contexts may be essential in developing effective public health policies and interventions in preventing mental ill health and promoting mental wellbeing in children and adolescents.