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14 pages, 2254 KiB  
Article
Effect of Copper Nanoparticles Surface-Capped by Dialkyl Dithiophosphate on Different Base Oil Viscosity
by Xufei Wang, Shuguang Fan, Ningning Song, Laigui Yu, Yujuan Zhang and Shengmao Zhang
Lubricants 2024, 12(4), 137; https://doi.org/10.3390/lubricants12040137 (registering DOI) - 18 Apr 2024
Abstract
In order to more accurately characterize the effects of nanoparticles on lubricant viscosity, the effects of copper dialkyl dithiophosphate (HDDP)-modified (CuDDP) nanoparticles on the dynamic viscosity of mineral oils 150N, alkylated naphthalene (AN5), diisooctyl sebacate (DIOS), and polyalphaolefins (PAO4, PAO6, PAO10, PAO40, and [...] Read more.
In order to more accurately characterize the effects of nanoparticles on lubricant viscosity, the effects of copper dialkyl dithiophosphate (HDDP)-modified (CuDDP) nanoparticles on the dynamic viscosity of mineral oils 150N, alkylated naphthalene (AN5), diisooctyl sebacate (DIOS), and polyalphaolefins (PAO4, PAO6, PAO10, PAO40, and PAO100) were investigated at an experimental temperature of 40 °C and additive mass fraction ranging from 0.5% to 2.5%. CuDDP exhibits a viscosity-reducing effect on higher-viscosity base oils, such as PAO40 and PAO100, and a viscosity-increasing effect on lower-viscosity base oils, namely, 150N, AN5, DIOS, PAO4, PAO6, and PAO10. These effects can be attributed to the interfacial slip effect and the shear resistance of the nanoparticles. The experimental dynamic viscosity of the eight base oils containing CuDDP was compared with that calculated by the three classical formulae of nanofluid viscosity, The predicted viscosity values of the formulae deviated greatly from the experimental viscosity values, with the maximum deviation being 7.9%. On this basis, the interface slip effect was introduced into Einstein’s formula, the interface effect was quantified with the aniline point of the base oil, and a new equation was established to reflect the influence of CuDDP nanoparticles on lubricating oil viscosity. It can better reflect the influence of CuDDP on the viscosity of various base oils, and the deviation from the experimental data is less than 1.7%. Full article
(This article belongs to the Special Issue Functional Lubricating Materials)
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17 pages, 15630 KiB  
Article
Submarine Morphological Description of the Ancient Archipelagic Aprons in the Marcus–Wake Seamount Group, Northwestern Pacific Ocean
by Xiao Wang, Huaiming Li, Yongshou Cheng, Pengfei Yao, Fengyou Chu, Weilin Ma, Hongyi Wang, Shihui Lv, Xiaohu Li, Zhenggang Li, Weiyan Zhang and Yanhui Dong
J. Mar. Sci. Eng. 2024, 12(4), 670; https://doi.org/10.3390/jmse12040670 (registering DOI) - 18 Apr 2024
Abstract
Herein, the morphological characteristics of submarine archipelagic aprons were presented for five guyots, Suda, Arnold, Lamont, Niulang, and Zhinyv, which are over 80 Ma years old and are located in the Marcus–Wake seamount group, northwestern Pacific Ocean. Nearly 28 landslide deposits were recognized [...] Read more.
Herein, the morphological characteristics of submarine archipelagic aprons were presented for five guyots, Suda, Arnold, Lamont, Niulang, and Zhinyv, which are over 80 Ma years old and are located in the Marcus–Wake seamount group, northwestern Pacific Ocean. Nearly 28 landslide deposits were recognized using the bathymetry and backscatter intensity data collected from the studied guyots. Landslides and their deposits that surround seamounts are mostly related to the morphology of debris avalanches, scarps, gullies/channels, and bedforms. The morphology of the archipelagic aprons of the studied guyots indicates mutual landslide processes, including slump and distinct debris avalanches arising from a cohesive or cohesionless landslide material flow. The superimposition of debris flows and sedimentation dominates the recent stages of the studied guyots. The archipelagic aprons corresponding to convex-arc-shaped scarps exhibit larger domains compared to the invagination-arc-shaped scarps with similar lateral lengths. The scarp morphologies of the studied guyots are predominantly of the complex-arc shape, indicating multiple landslide events. Parallel and convergent gullies and channels are mostly found on the elongated landslide deposits, whereas divergent and radial gullies and channels are mostly distributed on the fan-shaped aprons. Ubiquitous sediment waves occurred on the bedforms of the distal archipelagic apron across the studied guyots because of sediment creep. Small-scale sediment waves were only observed in the channels on the aprons of the Suda guyot. Full article
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13 pages, 12931 KiB  
Case Report
Clinical Approach to Patients with COVID-19 and Unrecognized Obstructive Sleep Apnea
by Melany Ćurić, Frano Marinelli, Vuk Prica, Marijana Pavlović and Igor Barković
Clin. Pract. 2024, 14(2), 629-641; https://doi.org/10.3390/clinpract14020050 (registering DOI) - 18 Apr 2024
Abstract
Purpose: We conducted a retrospective case series of seven male COVID-19 patients with respiratory failure and suspected OSA based on clinical features to evaluate the effects of undiagnosed obstructive sleep apnea (OSA) on COVID-19 outcomes and the response to a continuous positive airway [...] Read more.
Purpose: We conducted a retrospective case series of seven male COVID-19 patients with respiratory failure and suspected OSA based on clinical features to evaluate the effects of undiagnosed obstructive sleep apnea (OSA) on COVID-19 outcomes and the response to a continuous positive airway pressure (CPAP) treatment. Cardiorespiratory polygraphy (CRP) and a continuous positive airway pressure treatment were used for diagnosis and management. They confirmed severe obstructive sleep apnea in all patients (apnea/hypopnea index > 30) and improved overnight oxygenation and symptoms at the 1-month follow-up. Conclusions: Undiagnosed obstructive sleep apnea may negatively impact COVID-19 outcomes by exacerbating respiratory failure. Recognition and treatment with continuous positive airway pressure can optimize the management of such patients. Full article
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13 pages, 4852 KiB  
Article
Climate-Change-Driven Shifts in Aegilops tauschii Species Distribution: Implications for Food Security and Ecological Conservation
by Shirin Mahmoodi, Mohammad Jaffar Aghaei, Kourosh Ahmadi and Amir Naghibi
Diversity 2024, 16(4), 241; https://doi.org/10.3390/d16040241 (registering DOI) - 18 Apr 2024
Abstract
Climate change has diverse effects on the planet’s environment, including changes and shifts in the distribution and abundance of species. In this paper, we present a robust prediction ensemble algorithm for the current and future species distribution of Aegilops tauschii. Four modeling [...] Read more.
Climate change has diverse effects on the planet’s environment, including changes and shifts in the distribution and abundance of species. In this paper, we present a robust prediction ensemble algorithm for the current and future species distribution of Aegilops tauschii. Four modeling approaches were trained using various environmental variables (bioclimatic and soil variables) to accurately predict the species distribution for future scenarios. The results showed that GBM and RF demonstrated the most accurate predictions with an Area Under the Receiver Operating Characteristic (ROC) Curve (AUC) of 0.80 and 0.83, respectively. The results of variable importance depicted that the temperature seasonality (bio4) was the most important and effective factor in determining the habitat suitability of Ae. tauschii, followed closely by the precipitation seasonality (bioclimate 15) and the mean temperature of the warmest quarter (bio10). Then, the distribution maps of Ae. tauschii were produced under climate change scenarios for 2050 and 2070. The results showed that Ae. tauschii will lose some of its suitable habitats under climate change and that this loss will be more severe in the east part of the study area. The results of the present study have important implications for ecological conservation as they can assist in identifying critical habitats and inform conservation planning efforts. Our model provides a valuable tool for understanding the potential future distribution of Ae. tauschii and highlights the need for continuous monitoring and protection of this species. Full article
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12 pages, 1140 KiB  
Review
From Diabetes to Oncology: Glucagon-like Peptide-1 (GLP-1) Receptor Agonist’s Dual Role in Prostate Cancer
by Abdulrahman Alhajahjeh, Raad Al-Faouri, Hisham F. Bahmad, Taima’ Bader, Ryan W. Dobbs, Ahmed A. Abdulelah, Wassim Abou-Kheir, Elai Davicioni, David I. Lee and Mohammed Shahait
Cancers 2024, 16(8), 1538; https://doi.org/10.3390/cancers16081538 (registering DOI) - 18 Apr 2024
Abstract
Glucagon-like peptide-1 (GLP-1), an incretin hormone renowned for its role in post-meal blood sugar regulation and glucose-dependent insulin secretion, has gained attention as a novel treatment for diabetes through GLP-1 receptor agonists (GLP-1-RA). Despite their efficacy, concerns have been raised regarding the potential [...] Read more.
Glucagon-like peptide-1 (GLP-1), an incretin hormone renowned for its role in post-meal blood sugar regulation and glucose-dependent insulin secretion, has gained attention as a novel treatment for diabetes through GLP-1 receptor agonists (GLP-1-RA). Despite their efficacy, concerns have been raised regarding the potential associations between GLP-1-RA and certain malignancies, including medullary thyroid cancer. However, evidence of its association with prostate cancer (PCa) remains inconclusive. This review delves into the intricate relationship between GLP-1-RA and PCa, exploring the mechanisms through which GLP-1-Rs may impact PCa cells. We discuss the potential pathways involving cAMP, ERK, AMPK, mTOR, and P27. Furthermore, we underscore the imperative for additional research to elucidate the impact of GLP-1-RA treatment on PCa progression, patient outcomes, and potential interactions with existing therapies. Translational studies and clinical trials are crucial for a comprehensive understanding of the role of GLP-1-RA in PCa management. Full article
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6 pages, 210 KiB  
Editorial
Special Issue on Modified Gravity Approaches to the Tensions of ΛCDM: Goals and Highlights
by Eleonora Di Valentino, Leandros Perivolaropoulos and Jackson Levi Said
Universe 2024, 10(4), 184; https://doi.org/10.3390/universe10040184 (registering DOI) - 18 Apr 2024
Abstract
The standard cosmological model, known as ΛCDM, has been remarkably successful in providing a coherent and predictive framework for understanding the Universe’s evolution, its large-scale structure, and cosmic microwave background (CMB) radiation [...] Full article
(This article belongs to the Special Issue Modified Gravity Approaches to the Tensions of ΛCDM)
20 pages, 543 KiB  
Article
Leaders’ Social and Disability Justice Drive to Cultivate Inclusive Schooling
by Chelsea P. Tracy-Bronson
Educ. Sci. 2024, 14(4), 424; https://doi.org/10.3390/educsci14040424 (registering DOI) - 18 Apr 2024
Abstract
The purpose of this article is to understand administrators’ personal beliefs and experiences related to inclusive education and social justice that are critical to their commitment, the leadership provided, and types of special education services that prevail in their districts. This study is [...] Read more.
The purpose of this article is to understand administrators’ personal beliefs and experiences related to inclusive education and social justice that are critical to their commitment, the leadership provided, and types of special education services that prevail in their districts. This study is embedded within a conceptual framework centered on inclusive education, and existing theoretical framings of leadership for social justice and disability studies in education. Further, it contributes to the conversation in a recent call to reimagine educational approaches in the United States that challenge systems, focus on racial and disability justice, and serve the public good. A qualitative research methodology with in-depth interviewing as the data collection method was used to understand the lived experiences and practices of seven district-level special education leaders. It specifically looks at the leaders’ drive to carry out social justice work and their overall value-based mission of socially just, equity-oriented inclusive education at the district level. It provides a research study on (1) how leaders come to carry out social justice and disability justice work in schools, (2) poignant career events that shape their justice work, and (3) their intentions to prepare under-represented and traditionally marginalized students to engage in society. The overall premise is that since district-level leaders are vital in shaping public schooling spaces, understanding their social and disability justice grounding is critical to disrupt marginalizing practices in PreK-12. Full article
(This article belongs to the Special Issue Making Our Way: Rethinking and Disrupting Teacher Education)
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12 pages, 4146 KiB  
Article
Rapid Surface Charge Mapping Based on a Liquid Crystal Microchip
by Leixin Ouyang, Heyi Chen, Ruiting Xu, Rubia Shaik, Ge Zhang and Jiang Zhe
Biosensors 2024, 14(4), 199; https://doi.org/10.3390/bios14040199 (registering DOI) - 18 Apr 2024
Abstract
Rapid surface charge mapping of a solid surface remains a challenge. In this study, we present a novel microchip based on liquid crystals for assessing the surface charge distribution of a planar or soft surface. This chip enables rapid measurements of the local [...] Read more.
Rapid surface charge mapping of a solid surface remains a challenge. In this study, we present a novel microchip based on liquid crystals for assessing the surface charge distribution of a planar or soft surface. This chip enables rapid measurements of the local surface charge distribution of a charged surface. The chip consists of a micropillar array fabricated on a transparent indium tin oxide substrate, while the liquid crystal is used to fill in the gaps between the micropillar structures. When an object is placed on top of the chip, the local surface charge (or zeta potential) influences the orientation of the liquid crystal molecules, resulting in changes in the magnitude of transmitted light. By measuring the intensity of the transmitted light, the distribution of the surface charge can be accurately quantified. We calibrated the chip in a three-electrode configuration and demonstrated the validity of the chip for rapid surface charge mapping using a borosilicate glass slide. This chip offers noninvasive, rapid mapping of surface charges on charged surfaces, with no need for physical or chemical modifications, and has broad potential applications in biomedical research and advanced material design. Full article
(This article belongs to the Special Issue Advancing Biomedical Biosensing with Microelectrode Arrays)
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9 pages, 226 KiB  
Article
Exercise-Induced Troponin Elevation in High-Performance Cross-Country Skiers
by Tom Kastner, Florian Frohberg, Judith Hesse, Bernd Wolfarth and Jan C. Wuestenfeld
J. Clin. Med. 2024, 13(8), 2335; https://doi.org/10.3390/jcm13082335 (registering DOI) - 18 Apr 2024
Abstract
Background: Troponin I and T are biomarkers to diagnose myocardial infarction and damage. Studies indicate that strenuous physical activity can cause transient increases in these troponin levels, typically considered physiological. However, current data show differences in the exercise-induced increase in troponin I and [...] Read more.
Background: Troponin I and T are biomarkers to diagnose myocardial infarction and damage. Studies indicate that strenuous physical activity can cause transient increases in these troponin levels, typically considered physiological. However, current data show differences in the exercise-induced increase in troponin I and T in elite athletes. Method: This prospective clinical study aimed to determine troponin I and T levels in 36 top cross-country skiers of the German national team (18 male, 18 female) after a standardized competition load over two days. All study participants underwent a comprehensive sports medical and cardiological evaluation, including ECG and echocardiography. A multivariable regression analysis was utilized to identify possible predictors of increased troponin I levels. Results: Only three male athletes (8.1%) showed an isolated increase in Troponin I (Ø 112.49 ng/L, cut off < 45.2 ng/L), while no increase in troponin T in the study population was detected. Conclusions: The analysis suggested several potential predictors for increased troponin I levels, such as height, weight, weekly training hours, and indications of an enlarged sports heart, though none achieved statistical significance. Knowing the different exercise-induced detectability of the various troponins in the clinical setting is essential. Full article
(This article belongs to the Section Sports Medicine)
5 pages, 199 KiB  
Editorial
The Many-Worlds Interpretation of Quantum Mechanics: Current Status and Relation to Other Interpretations
by Lev Vaidman
Quantum Rep. 2024, 6(2), 142-146; https://doi.org/10.3390/quantum6020011 (registering DOI) - 18 Apr 2024
Abstract
This is a preface to a Special Issue of Quantum Reports devoted to the results of the workshop “The Many-Worlds Interpretation of Quantum Mechanics: Current Status and Relation to Other Interpretations” [...] Full article
(This article belongs to the Special Issue The Many-Worlds Interpretation of Quantum Mechanics)
13 pages, 2804 KiB  
Article
MTP-YOLO: You Only Look Once Based Maritime Tiny Person Detector for Emergency Rescue
by Yonggang Shi, Shaokun Li, Ziyan Liu, Zhiguo Zhou and Xuehua Zhou
J. Mar. Sci. Eng. 2024, 12(4), 669; https://doi.org/10.3390/jmse12040669 (registering DOI) - 18 Apr 2024
Abstract
Tiny person detection based on computer vision technology is critical for maritime emergency rescue. However, humans appear very small on the vast sea surface, and this poses a huge challenge in identifying them. In this study, a single-stage tiny person detector, namely the [...] Read more.
Tiny person detection based on computer vision technology is critical for maritime emergency rescue. However, humans appear very small on the vast sea surface, and this poses a huge challenge in identifying them. In this study, a single-stage tiny person detector, namely the “You only look once”-based Maritime Tiny Person detector (MTP-YOLO), is proposed for detecting maritime tiny persons. Specifically, we designed the cross-stage partial layer with two convolutions Efficient Layer Aggregation Networks (C2fELAN) by drawing on the Generalized Efficient Layer Aggregation Networks (GELAN) of the latest YOLOv9, which preserves the key features of a tiny person during the calculations. Meanwhile, in order to accurately detect tiny persons in complex backgrounds, we adopted a Multi-level Cascaded Enhanced Convolutional Block Attention Module (MCE-CBAM) to make the network attach importance to the area where the object is located. Finally, by analyzing the sensitivity of tiny objects to position and scale deviation, we proposed a new object position regression cost function called Weighted Efficient Intersection over Union (W-EIoU) Loss. We verified our proposed MTP-YOLO on the TinyPersonv2 dataset. All these results confirm that this method significantly improves model performance while maintaining a low number of parameters and can therefore be applied to maritime emergency rescue missions. Full article
(This article belongs to the Special Issue Application of Advanced Technologies in Maritime Safety)
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18 pages, 6400 KiB  
Article
Vegetation–Lake–Sand Landscape of Northeast China Sandy Land between 1980 and 2022: Pattern, Evolution, and Driving Forces
by Weiyi Lu, Geer Teni and Huishi Du
Sustainability 2024, 16(8), 3382; https://doi.org/10.3390/su16083382 (registering DOI) - 18 Apr 2024
Abstract
Northeast China’s sandy region is an arid and semi-arid zone highly susceptible to climate change. Investigating the long-term changes in the Northeast China sandy land (Northeast China sandy land, DBSL) landscape can provide an important basis for the ecological restoration of this region. [...] Read more.
Northeast China’s sandy region is an arid and semi-arid zone highly susceptible to climate change. Investigating the long-term changes in the Northeast China sandy land (Northeast China sandy land, DBSL) landscape can provide an important basis for the ecological restoration of this region. This study analyzed long-term remote sensing data of the DBSL from 1980 to 2022 and explored the spatial pattern, evolution, and driving mechanisms. In 2022, vegetation was mainly distributed in the northwest, center, and southwest, covering a total area of 30,508.82 km2. Areas with high and medium vegetation cover showed strong aggregation characteristics and were mainly distributed in the southwest, whereas those with low vegetation coverage were highly dispersed and widely distributed in the central region. Lakes were widely distributed in the northwest and central regions, with a total area of 2736.43 km2. In the last 42 years, the vegetation cover decreased by 24.48%. Areas with high and medium vegetation coverage decreased in size, and those with low vegetation coverage first increased and then decreased, with overall decreases of 35.35%, 19.16%, and 6.88%, respectively. The overall area of the DBSL showed various degrees of degradation. Shrinking and dry lakes were concentrated in the sandy hinterland. The lake landscape changed significantly from 1990 to 2010, with a decrease in lake area of 27.41%. In contrast, the sandy area increased by 25.65%, indicating a high degree of desertification. However, from 2005 to 2022, desertification decelerated. The most important factors driving the evolution of the DBSL were socio-economic factors. The increase in human disturbance will have a certain impact on the landscape changes in the region in the short term. The national policy of returning farmland to fields and grasslands will affect the increase of vegetation and lake landscape area in the short term, and the sand area and excessive animal husbandry will be reduced. This study provides a scientific basis for ecological restoration and sustainable development in Northeast China. Full article
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25 pages, 1661 KiB  
Article
An Optimized Deep Learning Approach for Detecting Fraudulent Transactions
by Said El Kafhali, Mohammed Tayebi and Hamza Sulimani
Information 2024, 15(4), 227; https://doi.org/10.3390/info15040227 (registering DOI) - 18 Apr 2024
Abstract
The proliferation of new technologies and advancements in existing ones are altering our perspective of the world. So, continuous improvements are needed. A connected world filled with a vast amount of data was created as a result of the integration of these advanced [...] Read more.
The proliferation of new technologies and advancements in existing ones are altering our perspective of the world. So, continuous improvements are needed. A connected world filled with a vast amount of data was created as a result of the integration of these advanced technologies in the financial sector. The advantages of this connection came at the cost of more sophisticated and advanced attacks, such as fraudulent transactions. To address these illegal transactions, researchers and engineers have created and implemented various systems and models to detect fraudulent transactions; many of them produce better results than others. On the other hand, criminals change their strategies and technologies to imitate legitimate transactions. In this article, the objective is to propose an intelligent system for detecting fraudulent transactions using various deep learning architectures, including artificial neural networks (ANNs), recurrent neural networks (RNNs), and long short-term memory (LSTM). Furthermore, the Bayesian optimization algorithm is used for hyperparameter optimization. For the evaluation, a credit card fraudulent transaction dataset was used. Based on the many experiments conducted, the RNN architecture demonstrated better efficiency and yielded better results in a shorter computational time than the ANN LSTM architectures. Full article
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20 pages, 7186 KiB  
Article
Numerical Analysis of Bearing Capacity in Deep Excavation Support Structures: A Comparative Study of Nailing Systems and Helical Anchors
by Seyyed Alireza Taghavi, Farhad Mahmoudi Jalali, Reza Moezzi, Reza Yeganeh Khaksar, Stanisław Wacławek, Mohammad Gheibi and Andres Annuk
Eng 2024, 5(2), 657-676; https://doi.org/10.3390/eng5020037 (registering DOI) - 18 Apr 2024
Abstract
The increasing demand for deep excavations in construction projects emphasizes the necessity of robust support structures to ensure safety and stability. Support structures are critical in stabilizing excavation pits, with a primary focus on enhancing their bearing capacity. This paper employs finite element [...] Read more.
The increasing demand for deep excavations in construction projects emphasizes the necessity of robust support structures to ensure safety and stability. Support structures are critical in stabilizing excavation pits, with a primary focus on enhancing their bearing capacity. This paper employs finite element modeling techniques to conduct a numerical analysis of nails and helical anchors’ bearing capacity. To reinforce the stability of pit walls, selecting an appropriate method for guard structure construction is imperative. The chosen method should efficiently redistribute forces induced by soil mass weight, displacements, and potential loads in the pit vicinity to the ground. Various techniques, including trusses, piles, cross-bracing systems, nailing, and anchorage systems, are utilized for this purpose. The study evaluates numerical models for two guard structure configurations: nailing systems and helical anchorage. It examines the impact of parameters such as displacement, helical helix count, helix diameter variations, and the integration of nailing systems with helices. Comparative analyses are conducted, including displacement comparisons between different nailing systems and helical anchor systems, along with laboratory-sampled data. The research yields significant insights, with a notable finding highlighting the superior performance of helical bracings compared to nailing systems. The conclusions drawn from this study provide specific outcomes that contribute valuable knowledge to the field of deep excavation support structures, guiding future design and implementation practices. Full article
(This article belongs to the Special Issue Feature Papers in Eng 2024)
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23 pages, 4906 KiB  
Article
Examination of Accurate Exocentric Distance Estimates in a Virtual Environment Using a Desktop Display and the Gear VR
by Tibor Guzsvinecz, Judit Szűcs and Erika Perge
Electronics 2024, 13(8), 1536; https://doi.org/10.3390/electronics13081536 (registering DOI) - 18 Apr 2024
Abstract
Spatial perception plays a critical role in virtual worlds and real environments, as it can impact navigation abilities. To understand this influence, the conducted study investigated the effects of human characteristics and immersion levels on the exocentric distance estimation process in virtual environments. [...] Read more.
Spatial perception plays a critical role in virtual worlds and real environments, as it can impact navigation abilities. To understand this influence, the conducted study investigated the effects of human characteristics and immersion levels on the exocentric distance estimation process in virtual environments. As the first step, a virtual environment was implemented for both desktop and Gear VR head-mounted displays. Afterward, the exocentric distance estimation skills of 229 university students were examined. Out of these students, 157 used the desktop display, and 72 used the Gear VR. Using logistic regression analysis and linear regression analysis methods, their effects on the probabilities of accurate estimates and their estimation times were investigated. According to the results, gender, video game playtime per week, height, and display device had significant effects on the former, whereas dominant hand, video game playtime per week, height, and display device had significant effects on the latter. The results also show that by using the head-mounted display, the likelihood of the students estimating exocentric distances accurately significantly decreased; however, they were significantly faster with it. These findings can influence the development of more accessible and effective virtual environments in the future. Full article
(This article belongs to the Special Issue Applications of Virtual, Augmented and Mixed Reality)
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9 pages, 206 KiB  
Article
Comparison of Closed and Open Surgical Technique for Second to Fifth Metacarpal Shaft Fractures: A Multicenter, Retrospective Study in a Dutch City Population
by Marcel Libertus Johannes Quax, Maarten Kielman, Sven Albert Meylaerts and Alexander Pieter Antony Greeven
Surgeries 2024, 5(2), 264-272; https://doi.org/10.3390/surgeries5020024 (registering DOI) - 18 Apr 2024
Abstract
The aim of this study was to assess surgical treatment in metacarpal shaft fractures of the second to fifth ray to determine the functional outcomes and complications in open reduction and internal fixation (ORIF) versus closed reduction and internal fixation (CRIF). This was [...] Read more.
The aim of this study was to assess surgical treatment in metacarpal shaft fractures of the second to fifth ray to determine the functional outcomes and complications in open reduction and internal fixation (ORIF) versus closed reduction and internal fixation (CRIF). This was a retrospective study that included patients with metacarpal shaft fractures of the second to fifth rays who were treated surgically between 1 January 2007 and 31 December 2019. Functional outcomes were scored using the QuickDASH and Eq5D score. A total of 231 treated patients were included. Single fractures were seen in 180 patients, and multiple fractures in 51 patients. ORIF was applied in 141 patients and CRIF in 90 patients. The functional outcomes were not significantly different between the groups. Complications were found in 41 (29%) of the ORIF patients and 15 (17%) of the CRIF patients. The functional outcomes after single or multiple metacarpal shaft fractures were similar in the ORIF and CRIF patients. ORIF showed significantly more complications, such as functional impairment and infections and a higher reoperation rate. In conclusion, CRIF is as safe as ORIF for the surgical treatment of metacarpal shaft fractures in terms of its functional outcome and slightly preferable due to its lower complication rate. Full article
21 pages, 1610 KiB  
Article
Validation and Suitability Assessment of Multiplex Mesoscale Discovery Immunogenicity Assay for Establishing Serological Signatures Using Vaccinated, Non-Vaccinated and Breakthrough SARS-CoV-2 Infected Cases
by Sushant Shengule, Shweta Alai, Sachin Bhandare, Sumant Patil, Manish Gautam, Bhushan Mangaonkar, Sumit Gupta, Umesh Shaligram and Sunil Gairola
Vaccines 2024, 12(4), 433; https://doi.org/10.3390/vaccines12040433 (registering DOI) - 18 Apr 2024
Abstract
Antibody responses to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) are multi-targeted and variable over time. Multiplex quantitative serological assays are needed to provide accurate and robust seropositivity data for the establishment of serological signatures during vaccination and or infection. We describe here [...] Read more.
Antibody responses to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) are multi-targeted and variable over time. Multiplex quantitative serological assays are needed to provide accurate and robust seropositivity data for the establishment of serological signatures during vaccination and or infection. We describe here the validation and evaluation of an electro-chemiluminescence (ECL)-based Mesoscale Discovery assay (MSD) for estimation of total and functional IgG relative to SARS-CoV-2 spike, nucleocapsid and receptor binding (RBD) proteins in human serum samples to establish serological signatures of SARS-CoV-2 natural infection and breakthrough cases. The 9-PLEX assay was validated as per ICH, EMA, and US FDA guidelines using a panel of sera samples, including the NIBSC/WHO reference panel (20/268). The assay demonstrated high specificity and selectivity in inhibition assays, wherein the homologous inhibition was more than 85% and heterologous inhibition was below 10%. The assay also met predetermined acceptance criteria for precision (CV < 20%), accuracy (70–130%) and dilutional linearity. The method’s applicability to serological signatures was demonstrated using sera samples (n = 45) representing vaccinated, infected and breakthrough cases. The method was able to establish distinct serological signatures and thus provide a potential tool for seroprevalence of SARS-CoV-2 during vaccination or infection. Full article
(This article belongs to the Special Issue SARS-CoV-2 Serology for the Rapid Diagnosis of COVID-19)
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31 pages, 4027 KiB  
Review
Atypical and Unpredictable Superficial Mycosis Presentations: A Narrative Review
by Zoubir Belmokhtar, Samira Djaroud, Derouicha Matmour and Yassine Merad
J. Fungi 2024, 10(4), 295; https://doi.org/10.3390/jof10040295 (registering DOI) - 18 Apr 2024
Abstract
While typically exhibiting characteristic features, fungal infections can sometimes present in an unusual context, having improbable localization (eyelid, face, or joint); mimicking other skin diseases such as eczema, psoriasis, or mycosis fungoides; and appearing with unexpected color, shape, or distribution. The emergence of [...] Read more.
While typically exhibiting characteristic features, fungal infections can sometimes present in an unusual context, having improbable localization (eyelid, face, or joint); mimicking other skin diseases such as eczema, psoriasis, or mycosis fungoides; and appearing with unexpected color, shape, or distribution. The emergence of such a challenging clinical picture is attributed to the complex interplay of host characteristics (hygiene and aging population), environment (climate change), advances in medical procedures, and agent factors (fungal resistance and species emergence). We aim to provide a better understanding of unusual epidemiological contexts and atypical manifestations of fungal superficial diseases, knowing that there is no pre-established clinical guide for these conditions. Thus, a literature examination was performed to provide a comprehensive analysis on rare and atypical superficial mycosis as well as an update on certain fungal clinical manifestations and their significance. The research and standard data extraction were performed using PubMed, Medline, Scopus, and EMBASE databases, and a total of 222 articles were identified. This review covers published research findings for the past six months. Full article
(This article belongs to the Special Issue New Perspectives for Superficial Fungal Infections)
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19 pages, 2418 KiB  
Article
Leveraging IoT Harmonization: An Efficacious NB-IoT Relay for Integrating 6LoWPAN Devices into Legacy IPv4 Networks
by Edgar Saavedra, Asuncion Santamaria, Guillermo del Campo and Igor Gomez
Appl. Sci. 2024, 14(8), 3411; https://doi.org/10.3390/app14083411 (registering DOI) - 18 Apr 2024
Abstract
The burgeoning complexity and heterogeneity of IoT networks, coupled with their rapid growth, constant evolution, and new players, present significant challenges in terms of connectivity, interoperability, management, and usability. These networks, composed of a diverse array of devices, technologies and the like, demand [...] Read more.
The burgeoning complexity and heterogeneity of IoT networks, coupled with their rapid growth, constant evolution, and new players, present significant challenges in terms of connectivity, interoperability, management, and usability. These networks, composed of a diverse array of devices, technologies and the like, demand innovative solutions to bridge the gaps between different IoT technologies and communication protocols. This article presents a simple, yet efficacious communication Relay to address one of these critical gaps. This Relay uses NB-IoT to ease the integration of 6LoWPAN-based IoT devices (IPv6) into the public legacy Internet (IPv4). This device translates 6LoWPAN, IPv6 CoAP messages into Internet-standard REST requests, so that appropriate handling of devices’ data be achieved in several stages. Thus, the Relay establishes two branches of communications: (i) the local network where the 6LoWPAN gateway is placed, and (ii) the public NB-IoT network. User interaction and data analysis are achieved by virtue of Home Assistant, where former 6LoWPAN devices are now discovered and shown as proper Home Assistant entities thanks to the Relay’s ease of integration into the open-source platform. This novel approach not only ensures efficient data and network management, but it also meets the urgent necessity for advanced solutions in enhancing actual IoT interconnectivity and monitoring. The unprecedented pace at which IoT devices, players and different networks have been proliferating in recent times is not compatible with countless manufacturer-dependent platforms, applications, and proprietary protocols that the IoT field has been leading with so far, almost from its beginnings. Full article
(This article belongs to the Special Issue Advances in the IoT and Smart Cities)
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24 pages, 1885 KiB  
Review
The Necessity of Taking Culture and Context into Account When Studying the Relationship between Socioeconomic Status and Brain Development
by Julie M. Schneider, Mohammad Hossein Behboudi and Mandy J. Maguire
Brain Sci. 2024, 14(4), 392; https://doi.org/10.3390/brainsci14040392 (registering DOI) - 18 Apr 2024
Abstract
Decades of research has revealed a relationship between childhood socioeconomic status (SES) and brain development at the structural and functional levels. Of particular note is the distinction between income and maternal education, two highly correlated factors which seem to influence brain development through [...] Read more.
Decades of research has revealed a relationship between childhood socioeconomic status (SES) and brain development at the structural and functional levels. Of particular note is the distinction between income and maternal education, two highly correlated factors which seem to influence brain development through distinct pathways. Specifically, while a families’ income-to-needs ratio is linked with physiological stress and household chaos, caregiver education influences the day-to-day language environment a child is exposed to. Variability in either one of these environmental experiences is related to subsequent brain development. While this work has the potential to inform public policies in a way that benefits children, it can also oversimplify complex factors, unjustly blame low-SES parents, and perpetuate a harmful deficit perspective. To counteract these shortcomings, researchers must consider sociodemographic differences in the broader cultural context that underlie SES-based differences in brain development. This review aims to address these issues by (a) identifying how sociodemographic mechanisms associated with SES influence the day-to-day experiences of children, in turn, impacting brain development, while (b) considering the broader cultural contexts that may differentially impact this relationship. Full article
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14 pages, 4488 KiB  
Article
Synthesis of rGO/CoFe2O4 Composite and Its Magnetorheological Characteristics
by Yang Lv, Chengjie Gong, Yuzhen Dong and Hyoung Jin Choi
Materials 2024, 17(8), 1859; https://doi.org/10.3390/ma17081859 (registering DOI) - 18 Apr 2024
Abstract
In this study, composite particles of rGO/CoFe2O4 were synthesized using a solvothermal method to fabricate a low-density magnetorheological (MR) material with enhanced sedimentation stability. The morphology and crystallographic features of rGO/CoFe2O4 were characterized via SEM, TEM, and [...] Read more.
In this study, composite particles of rGO/CoFe2O4 were synthesized using a solvothermal method to fabricate a low-density magnetorheological (MR) material with enhanced sedimentation stability. The morphology and crystallographic features of rGO/CoFe2O4 were characterized via SEM, TEM, and XRD, and its magnetic properties were tested using VSM. The MR fluid was formulated by blending rGO/CoFe2O4 particles into silicone oil. Under different magnet strengths (H), a rotational rheometer was used to test its MR properties. Typical MR properties were observed, including shear stress, viscosity, storage/loss modulus, and dynamic yield stress (τdy) following the Herschel–Bulkley model reaching 200 Pa when H is 342 kA/m. Furthermore, the yield stress of the MR fluid follows a power law relation as H increases and the index changes from 2.0 (in the low H region) to 1.5 (in the high H region). Finally, its MR efficiency was calculated to be about 104% at H of 342 kA/m. Full article
(This article belongs to the Section Smart Materials)
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17 pages, 5814 KiB  
Article
COVID-19 Diagnosis by Extracting New Features from Lung CT Images Using Fractional Fourier Transform
by Ali Nokhostin and Saeid Rashidi
Fractal Fract. 2024, 8(4), 237; https://doi.org/10.3390/fractalfract8040237 (registering DOI) - 18 Apr 2024
Abstract
COVID-19 is a lung disease caused by a coronavirus family virus. Due to its extraordinary prevalence and associated death rates, it has spread quickly to every country in the world. Thus, achieving peaks and outlines and curing different types of relapses is extremely [...] Read more.
COVID-19 is a lung disease caused by a coronavirus family virus. Due to its extraordinary prevalence and associated death rates, it has spread quickly to every country in the world. Thus, achieving peaks and outlines and curing different types of relapses is extremely important. Given the worldwide prevalence of coronavirus and the participation of physicians in all countries, information has been gathered regarding the properties of the virus, its diverse types, and the means of analyzing it. Numerous approaches have been used to identify this evolving virus. It is generally considered the most accurate and acceptable method of examining the patient’s lungs and chest through a CT scan. As part of the feature extraction process, a method known as fractional Fourier transform (FrFT) has been applied as one of the time-frequency domain transformations. The proposed method was applied to a database consisting of 2481 CT images. Following the transformation of all images into equal sizes and the removal of non-lung areas, multiple combination windows are used to reduce the number of features extracted from the images. In this paper, the results obtained for KNN and SVM classification have been obtained with accuracy values of 99.84% and 99.90%, respectively. Full article
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34 pages, 3363 KiB  
Review
Stephanoascus ciferrii Complex: The Current State of Infections and Drug Resistance in Humans
by Terenzio Cosio, Francesca Pica, Carla Fontana, Enrico Salvatore Pistoia, Marco Favaro, Isabel Valsecchi, Nikkia Zarabian, Elena Campione, Françoise Botterel and Roberta Gaziano
J. Fungi 2024, 10(4), 294; https://doi.org/10.3390/jof10040294 (registering DOI) - 18 Apr 2024
Abstract
In recent years, the incidence of fungal infections in humans has increased dramatically, accompanied by an expansion in the number of species implicated as etiological agents, especially environmental fungi never involved before in human infection. Among fungal pathogens, Candida species are the most [...] Read more.
In recent years, the incidence of fungal infections in humans has increased dramatically, accompanied by an expansion in the number of species implicated as etiological agents, especially environmental fungi never involved before in human infection. Among fungal pathogens, Candida species are the most common opportunistic fungi that can cause local and systemic infections, especially in immunocompromised individuals. Candida albicans (C. albicans) is the most common causative agent of mucosal and healthcare-associated systemic infections. However, during recent decades, there has been a worrying increase in the number of emerging multi-drug-resistant non-albicans Candida (NAC) species, i.e., C. glabrata, C. parapsilosis, C. tropicalis, C. krusei, C. auris, and C. ciferrii. In particular, Candida ciferrii, also known as Stephanoascus ciferrii or Trichomonascus ciferrii, is a heterothallic ascomycete yeast-like fungus that has received attention in recent decades as a cause of local and systemic fungal diseases. Today, the new definition of the S. ciferrii complex, which consists of S. ciferrii, Candida allociferrii, and Candida mucifera, was proposed after sequencing the 18S rRNA gene. Currently, the S. ciferrii complex is mostly associated with non-severe ear and eye infections, although a few cases of severe candidemia have been reported in immunocompromised individuals. Low susceptibility to currently available antifungal drugs is a rising concern, especially in NAC species. In this regard, a high rate of resistance to azoles and more recently also to echinocandins has emerged in the S. ciferrii complex. This review focuses on epidemiological, biological, and clinical aspects of the S. ciferrii complex, including its pathogenicity and drug resistance. Full article
(This article belongs to the Special Issue Medically Relevant Species of Candida)
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