The 2023 MDPI Annual Report has
been released!
 
21 pages, 9536 KiB  
Article
Spatial and Temporal Variability in Oyster Settlement on Intertidal Reefs Support Site-Specific Assessments for Restoration Practices
by Shannon D. Kimmel, Hans J. Prevost, Alexandria Knoell, Pamela Marcum and Nicole Dix
J. Mar. Sci. Eng. 2024, 12(5), 766; https://doi.org/10.3390/jmse12050766 (registering DOI) - 30 Apr 2024
Abstract
As some of the most threatened ecosystems in the world, the declining condition and coverage of coastal habitats results in the loss of the myriad ecosystem services they provide. Due to the variability in physical and biological characteristics across sites, it is imperative [...] Read more.
As some of the most threatened ecosystems in the world, the declining condition and coverage of coastal habitats results in the loss of the myriad ecosystem services they provide. Due to the variability in physical and biological characteristics across sites, it is imperative to increase location-based information to inform local management projects, which will potentially help to reestablish functions of coastal habitats. Since oysters are often used in restoration projects, this study quantified spatial and temporal patterns in eastern oyster spat settlement in a bar-built estuary in northeast Florida, USA that is host to a robust population of intertidal oyster reefs. Spat settlement was found to occur from April to October with small peaks in the spring and large ones around September. Inter-annual differences in spat settlement were likely influenced by existing environmental conditions and heavily affected by large-scale events such as tropical cyclones. Variations in regional spat settlements are possibly driven by the residence times of the watersheds, the density of adult populations, and the location of the spat collectors. The results of this study illustrate place-based variability in oyster settlement patterns and underscore the importance of local monitoring for oyster resource management, restoration, and research. Full article
14 pages, 1425 KiB  
Article
1H-NMR Metabolomic Study of the Mushroom Pleurotus djamor for the Identification of Nematocidal Compounds
by Jesús Antonio Pineda-Alegría, Luis Manuel Peña-Rodríguez, Alexandre Cardoso-Taketa, José E. Sánchez, Juan Felipe de Jesús Torres-Acosta, Gloria Ivonne Hernández-Bolio, Anabel Ortiz-Caltempa, María Luisa Villarreal and Liliana Aguilar-Marcelino
Pharmaceuticals 2024, 17(5), 580; https://doi.org/10.3390/ph17050580 (registering DOI) - 30 Apr 2024
Abstract
Due to the increasing populations of anthelmintic-resistant gastrointestinal nematodes and as a consequence of the adverse effects of synthetic drugs, this study focuses on the search for secondary metabolites with nematocidal activity from the edible mushroom Pleurotus djamor using The proton nuclear magnetic [...] Read more.
Due to the increasing populations of anthelmintic-resistant gastrointestinal nematodes and as a consequence of the adverse effects of synthetic drugs, this study focuses on the search for secondary metabolites with nematocidal activity from the edible mushroom Pleurotus djamor using The proton nuclear magnetic resonance (1H-NMR) metabolomics. The highest activity was shown by the ethyl acetate fractions of mycelium (EC50 290.8 µg/mL) and basidiomes (EC50 282.7 µg/mL). Principal component analysis (PCA) and hierarchical data analysis (HCA) of the 1H-NMR metabolic profiles data showed that the ethanolic extracts, the ethyl acetate, butanol, and water fractions from mycelium have different metabolic profiles than those from basidiomes, while low polarity (hexane) fractions from both stages of fungal development show similar profiles. Orthogonal partial least squares discriminant analysis (OPLS-DA) allowed the identification of signals in the 1H-NMR metabolic profile associated with nematocidal activity. The signals yielded via OPLS-DA and bidimensional NMR analysis allowed the identification of uracil as a component in the ethyl acetate fraction from basidiomes, with an EC50 of 237.7 µg/mL. The results obtained showed that chemometric analyses of the 1H-NMR metabolic profiles represent a viable strategy for the identification of bioactive compounds from samples with complex chemical profiles. Full article
(This article belongs to the Special Issue Natural Products for Treatment of Parasitic Diseases)
33 pages, 2422 KiB  
Article
Analyzing Geospatial Cost Variability of Hybrid Solar–Gravity Storage System in High-Curtailment Suburban Areas
by Soumya Basu, Tetsuhito Hoshino and Hideyuki Okumura
Energies 2024, 17(9), 2162; https://doi.org/10.3390/en17092162 (registering DOI) - 30 Apr 2024
Abstract
The increased decentralization of renewable energy has increased curtailment rates in stagnating demand zones, increasing the levelized cost of energy (LCOE). The geographically dynamic nature of gravity energy storage (GES) is emerging in the field of mechanical energy storage, over pumped hydro. However, [...] Read more.
The increased decentralization of renewable energy has increased curtailment rates in stagnating demand zones, increasing the levelized cost of energy (LCOE). The geographically dynamic nature of gravity energy storage (GES) is emerging in the field of mechanical energy storage, over pumped hydro. However, GES costs vary geospatially, specifically in decentralized suburban areas, due to the impact of urban socioeconomics. This study aims to find a mathematical approximation of a cost-optimized location for suburban Solar–GES hybrid systems in curtailment-prone areas. A multi-parameterization model mathematically programmed land, transmission, supply chain and excavation costs into geospatial matrix approximations for suburban areas of 2500 km2 in Fukuoka and Ibaraki in Japan. It was found that SPV-GES location-dependent costs were mainly affected by distance from the city’s economic center and flat plains in suburbs, and supply chain and transmission costs optimized the location-dependent cost for GES at a specific point. It was also found that flat terrains were more economical than mountainous terrains due to high GES supply chain costs. With GES found to be cost-competitive compared to other storage technologies in Japan, this study reveals that GES introduction benefits the LCOE of suburban, decentralized SPV when curtailment is >50% irrespective of terrain. Full article
(This article belongs to the Topic Multiple Roads to Achieve Net-Zero Emissions by 2050)
19 pages, 3577 KiB  
Article
Estimating Landfill Landslide Probability Using SAR Satellite Products: A Novel Approach
by Adrián García-Gutiérrez, Jesús Gonzalo, Carlos Rubio and Maria Michela Corvino
Remote Sens. 2024, 16(9), 1618; https://doi.org/10.3390/rs16091618 (registering DOI) - 30 Apr 2024
Abstract
This article presents a methodology for evaluating the susceptibility of landfill areas to develop landslides by analyzing Synthetic Aperture Radar (SAR) satellite products. The deformation velocity of the landfills is computed through the Persistent Scatterer Method on SAR imagery. These data, combined with [...] Read more.
This article presents a methodology for evaluating the susceptibility of landfill areas to develop landslides by analyzing Synthetic Aperture Radar (SAR) satellite products. The deformation velocity of the landfills is computed through the Persistent Scatterer Method on SAR imagery. These data, combined with a deformation model based on the shallow water equations (SWE), form the foundation for a Monte Carlo experiment that extrapolates the current state of the landfill into the future. The results of this simulation are then employed to determine the probability of a landslide occurrence. In order to validate the methodology effectiveness, a case study is conducted on a landfill in Zaldibar, Spain, revealing its effectiveness in estimating the probability of landfill landslides. This innovative approach emerges as an asset in large landfill management, acting as a proactive tool for identifying high-risk sites and preventing potential landslides, ultimately safeguarding human life and the environment. By providing insights into landslide probabilities, this study enhances decision-making processes and facilitates the development of intervention strategies in the domain of landfill risk assessment and management. Full article
(This article belongs to the Section Earth Observation for Emergency Management)
26 pages, 16243 KiB  
Article
Altered Plasma Membrane Lipid Composition in Hypertensive Neutrophils Impacts Epithelial Sodium Channel (ENaC) Endocytosis
by Yolanda Ríos-Medina, Pedro Rico-Chávez, Ivette Martínez-Vieyra, Juan C. Durán-Álvarez, Mario Rodriguez-Varela, Ruth Rincón-Heredia, César Reyes-López and Doris Cerecedo
Int. J. Mol. Sci. 2024, 25(9), 4939; https://doi.org/10.3390/ijms25094939 (registering DOI) - 30 Apr 2024
Abstract
Biological membranes are composed of a lipid bilayer with embedded proteins, including ion channels like the epithelial sodium channel (ENaC), which are critical for sodium homeostasis and implicated in arterial hypertension (HTN). Changes in the lipid composition of the plasma membrane can significantly [...] Read more.
Biological membranes are composed of a lipid bilayer with embedded proteins, including ion channels like the epithelial sodium channel (ENaC), which are critical for sodium homeostasis and implicated in arterial hypertension (HTN). Changes in the lipid composition of the plasma membrane can significantly impact cellular processes related to physiological functions. We hypothesized that the observed overexpression of ENaC in neutrophils from HTN patients might result from alterations in the structuring domains within the plasma membrane, disrupting the endocytic processes responsible for ENaC retrieval. This study assessed the structural lipid composition of neutrophil plasma membranes from HTN patients along with the expression patterns of key elements regulating ENaC at the plasma membrane. Our findings suggest alterations in microdomain structure and SGK1 kinase activity, which could prolong ENaC presence on the plasma membrane. Additionally, we propose that the proteasomal and lysosomal degradation pathways are insufficient to diminish ENaC presence at the plasma membrane in HTN. These results highlight the importance of understanding ENaC retrieval mechanisms and suggest that targeting these mechanisms could provide insights for developing drugs to prevent and treat HTN. Full article
(This article belongs to the Section Biochemistry)
15 pages, 3853 KiB  
Article
Microstructural Evolution and Tensile Properties of Al-Si Piston Alloys during Long-Term Thermal Exposure
by Feng Xia, Xiongbo Dong, Jianli Wang, Hongbo Duan, Zhijun Ma and Minxian Liang
Metals 2024, 14(5), 535; https://doi.org/10.3390/met14050535 (registering DOI) - 30 Apr 2024
Abstract
The present study investigated microstructural evolution and changes in tensile properties of an Al-Si piston alloy subjected to thermal exposures at 250 and 350 °C for 150, 300, and 500 h. Microstructural and nanoscale precipitates were characterized using a combination of high-angle annular [...] Read more.
The present study investigated microstructural evolution and changes in tensile properties of an Al-Si piston alloy subjected to thermal exposures at 250 and 350 °C for 150, 300, and 500 h. Microstructural and nanoscale precipitates were characterized using a combination of high-angle annular dark field-scanning transmission electron microscopy (HAADF-STEM) images and scanning electron microscopy (SEM). The tensile testing was performed. The results demonstrated that the thermal exposure induced granulation of the δ-Al3CuNi particles, alongside precipitation of the θ-Al2Cu phase particles and AlCu clusters within the matrix. Specifically, an increase in the size and number density of the θ-Al2Cu phase particles was observed with exposure time at 250 °C. Conversely, at 350 °C, the θ-Al2Cu particles exhibited a gradual increase in size with prolonged thermal exposure, coupled with a decrease in their number density. AlCu clusters precipitated solely at a thermal exposure temperature of 350 °C, with precipitation intensifying over time. Moreover, a decrease in the alloy’s tensile strength and an increase in elongation were noted after thermal exposure. Finally, the present study discussed the precipitation mechanisms of θ-Al2Cu particles and AlCu clusters within the grains, suggesting that the AlCu clusters exerted a more effective strengthening effect compared to the θ-Al2Cu particles. Full article
11 pages, 1286 KiB  
Article
A Study on the Maximum Reliability of Multi-UAV Cooperation Relay Systems
by Ning Ning, Suiping Zhou, Weimin Bao and Xiaoping Li
Sensors 2024, 24(9), 2886; https://doi.org/10.3390/s24092886 (registering DOI) - 30 Apr 2024
Abstract
This paper studies the maximum reliability of multi-hop relay UAVs, in which UAVs provide wireless services for remote users as a coded cooperative relay without an end-to-end direct communication link. In this paper, the analytical expressions of the total power loss and total [...] Read more.
This paper studies the maximum reliability of multi-hop relay UAVs, in which UAVs provide wireless services for remote users as a coded cooperative relay without an end-to-end direct communication link. In this paper, the analytical expressions of the total power loss and total bit error rate are derived as reliability measures. First, based on the environmental statistical parameters, a LOS probability model is proposed. Then, the problem of minimizing the bit error rate of static and mobile UAVs is studied. The goal is to minimize the total bit error rate by jointly optimizing the height, elevation, power and path loss and introducing the maximum allowable path loss constraints, transmission power allocation constraints, and UAV height and elevation constraints. At the same time, the total path loss is minimized to achieve maximum ground communication coverage. However, the formulated joint optimization problem is nonconvex and generally difficult to solve. Therefore, we decomposed the problem into two subproblems and proposed an effective joint optimization iteration algorithm. Finally, the simulation results are given, and the analysis shows that the optimal height of different reliability measures is slightly different; thus, using the mobility of UAVs can improve the reliability of communication performance. Full article
(This article belongs to the Section Vehicular Sensing)
13 pages, 3678 KiB  
Article
Functional Optical Coherence Tomography of Rat Cortical Neurovascular Activation during Monopulse Electrical Stimulation with the Microelectrode Array
by Lin Yao, Jin Huang, Taixiang Liu, Han Gu, Changpeng Li, Ke Yang, Hongwei Yan, Lin Huang, Xiaodong Jiang, Chengcheng Wang and Qihua Zhu
Photonics 2024, 11(5), 420; https://doi.org/10.3390/photonics11050420 (registering DOI) - 30 Apr 2024
Abstract
This paper presents a study to evoke rat cortical functional activities, including hemodynamic and neural tissue signal changes, by monopulse electrical stimulation with a microelectrode array using functional optical coherence tomography (fOCT). Based on the principal component analysis and fuzzy clustering method (PCA-FCM), [...] Read more.
This paper presents a study to evoke rat cortical functional activities, including hemodynamic and neural tissue signal changes, by monopulse electrical stimulation with a microelectrode array using functional optical coherence tomography (fOCT). Based on the principal component analysis and fuzzy clustering method (PCA-FCM), the hemodynamic response of different size blood vessels in rat cortex are analyzed, showing that the hemodynamic response of the superficial large blood vessels is more concentrated. In the regions of neural tissue where blood vessels are removed, positive significant pixels (the intensity of the pixel for five consecutive frames is greater than the average value plus triple standard deviation) and negative significant pixels (the intensity of the pixel for five consecutive frames is less than the average value minus triple standard deviation) exist, and the averaged intensity signal responds rapidly with an onset time of ~20.8 ms. Furthermore, the hemodynamic response was delayed by ~3.5 s from the neural tissue response. fOCT can provide a label-free, large-scale and depth-resolved map of cortical neurovascular activation, which is a promising technology to monitor cortical small-scale neurovascular activities. Full article
(This article belongs to the Section Biophotonics and Biomedical Optics)
13 pages, 480 KiB  
Article
Establishment of Tissue Culture and Regeneration System in Hippophae gyantsensis Lian
by Anqi Zhao, Wei Xu, Pingjun Xu, Xinxian Zhang, Yunhua Wu, Ang Xu, Yinxiao Zhong, Abiodun Oladipo, Fuliang Cao and Fangfang Fu
Horticulturae 2024, 10(5), 460; https://doi.org/10.3390/horticulturae10050460 (registering DOI) - 30 Apr 2024
Abstract
Hippophae gyantsensis Lian is a pioneering tree species in Chinese forestry ecological engineering, known for its robust stress tolerance, water retention capacity, and soil improvement qualities. However, the lack of rapid nursery technology has been a significant impediment to the development of the [...] Read more.
Hippophae gyantsensis Lian is a pioneering tree species in Chinese forestry ecological engineering, known for its robust stress tolerance, water retention capacity, and soil improvement qualities. However, the lack of rapid nursery technology has been a significant impediment to the development of the H. gyantsensis industry. In the present study, we have successfully established a tissue culture regeneration system for H. gyantsensis. The most effective methods for seed disinfection, ensuring sterility in seedlings, were found to be 75% alcohol disinfection for 40 s and 10% sodium hypochlorite disinfection for 10 min. The best media tested for callus induction in cotyledons and hypocotyls of sterile seedlings were 1/3 MS + 0.5 mg/L KT + 0.75 mg/L NAA and 1/3 MS + 0.3 mg/L 6-BA + 1.5 mg/L IBA, respectively. As the explants, cotyledons yielded larger calli with a greater size and differentiation ability than hypocotyls. For the induction of indeterminate shoots and proliferation, the most suitable media were 1/3 MS + 0.5 mg/L IAA + 0.75 mg/L 6-BA and 1/3 MS + 1.0 mg/L 6-BA + 0.05 mg/L IBA + 0.1 mg/L KT, respectively. Lastly, the best worked rooting formulation was 1/4 MS + 0.3 mg/L IBA. This study marks a significant milestone in the establishment of a systematic tissue culture regeneration system for H. gyantsensis, which will facilitate the industrial rapid propagation of high-quality seedlings and provide the foundation for improvement through genetic transformation. Full article
(This article belongs to the Section Propagation and Seeds)
13 pages, 2491 KiB  
Article
Fourier Transform Infrared (FT-IR) Spectroscopy and Simple Algorithm Analysis for Rapid and Non-Destructive Assessment of Cotton Fiber Maturity and Crystallinity for Plant Mapping
by Hee-Jin Kim, Yongliang Liu and Linghe Zeng
Sensors 2024, 24(9), 2888; https://doi.org/10.3390/s24092888 (registering DOI) - 30 Apr 2024
Abstract
Information on boll distribution within a cotton plant is critical to evaluate the adaptation and response of cotton plants to environmental and biotic stress in cotton production. Cotton researchers have applied available conventional fiber measurements, such as the high volume instrument (HVI) and [...] Read more.
Information on boll distribution within a cotton plant is critical to evaluate the adaptation and response of cotton plants to environmental and biotic stress in cotton production. Cotton researchers have applied available conventional fiber measurements, such as the high volume instrument (HVI) and advanced fiber information system (AFIS), to map the location and the timing of boll development and distribution within plants and further to determine within-plant variability of cotton fiber properties. Both HVI and AFIS require numerous cotton bolls combined for the measurement. As an alternative approach, attenuated total reflection Fourier transform infrared (ATR FT-IR) spectroscopy was proposed to measure fiber maturity (MIR) and crystallinity (CIIR) of a sample as little as 0.5 mg lint. Extending fiber maturity and crystallinity measurement into a single boll for node-by-node mapping, FT-IR method might be advantageous due to less sampling amount compared with HVI and AFIS methods. Results showed that FT-IR technique enabled the evaluation of fiber MIR and CIIR at a boll level, which resulted in average MIR and CIIR values highly correlated with HVI micronaire (MIC) and AFIS maturity ratio (M). Hence, FT-IR technique possesses a good potential for a rapid and non-destructive node-by-node mapping of cotton boll maturity and crystallinity distribution. Full article
(This article belongs to the Section Smart Agriculture)
17 pages, 603 KiB  
Review
Current Advances in Mesenchymal Stem Cell Therapies Applied to Wounds and Skin, Eye, and Neuromuscular Diseases in Companion Animals
by Rosa Ana Picazo, Concepción Rojo, Jesus Rodriguez-Quiros and Alfredo González-Gil
Animals 2024, 14(9), 1363; https://doi.org/10.3390/ani14091363 (registering DOI) - 30 Apr 2024
Abstract
Mesenchymal stem cells (MSCs) are considered a very promising alternative tool in cell therapies and regenerative medicine due to their ease of obtaining from various tissues and their ability to differentiate into different cell types. This manuscript provides a review of current knowledge [...] Read more.
Mesenchymal stem cells (MSCs) are considered a very promising alternative tool in cell therapies and regenerative medicine due to their ease of obtaining from various tissues and their ability to differentiate into different cell types. This manuscript provides a review of current knowledge on the use of MSC-based therapies as an alternative for certain common pathologies in dogs and cats where conventional treatments are ineffective. The aim of this review is to assist clinical veterinarians in making decisions about the suitability of each protocol from a clinical perspective, rather than focusing solely on research. MSC-based therapies have shown promising results in certain pathologies, such as spinal cord injuries, wounds, and skin and eye diseases. However, the effectiveness of these cell therapies can be influenced by a wide array of factors, leading to varying outcomes. Future research will focus on designing protocols and methodologies that allow more precise and effective MSC treatments for each case. Full article
31 pages, 864 KiB  
Review
RGB Imaging as a Tool for Remote Sensing of Characteristics of Terrestrial Plants: A Review
by Anastasiia Kior, Lyubov Yudina, Yuriy Zolin, Vladimir Sukhov and Ekaterina Sukhova
Plants 2024, 13(9), 1262; https://doi.org/10.3390/plants13091262 (registering DOI) - 30 Apr 2024
Abstract
Approaches for remote sensing can be used to estimate the influence of changes in environmental conditions on terrestrial plants, providing timely protection of their growth, development, and productivity. Different optical methods, including the informative multispectral and hyperspectral imaging of reflected light, can be [...] Read more.
Approaches for remote sensing can be used to estimate the influence of changes in environmental conditions on terrestrial plants, providing timely protection of their growth, development, and productivity. Different optical methods, including the informative multispectral and hyperspectral imaging of reflected light, can be used for plant remote sensing; however, multispectral and hyperspectral cameras are technically complex and have a high cost. RGB imaging based on the analysis of color images of plants is definitely simpler and more accessible, but using this tool for remote sensing plant characteristics under changeable environmental conditions requires the development of methods to increase its informativity. Our review focused on using RGB imaging for remote sensing the characteristics of terrestrial plants. In this review, we considered different color models, methods of exclusion of background in color images of plant canopies, and various color indices and their relations to characteristics of plants, using regression models, texture analysis, and machine learning for the estimation of these characteristics based on color images, and some approaches to provide transformation of simple color images to hyperspectral and multispectral images. As a whole, our review shows that RGB imaging can be an effective tool for estimating plant characteristics; however, further development of methods to analyze color images of plants is necessary. Full article
12 pages, 379 KiB  
Article
Serum Biomarkers and Their Association with Myocardial Function and Exercise Capacity in Cardiac Transthyretin Amyloidosis
by Luis Nieto-Roca, Andrea Camblor Blasco, Ana Devesa, Sandra Gómez-Talavera, Jorge Balaguer-Germán, Jairo Lumpuy-Castillo, Ana María Pello, Luis Martínez Dhier, Gregoria Lapeña, Lucía Llanos Jiménez, Óscar Lorenzo, José Tuñón, Borja Ibáñez and Álvaro Aceña
J. Cardiovasc. Dev. Dis. 2024, 11(5), 142; https://doi.org/10.3390/jcdd11050142 (registering DOI) - 30 Apr 2024
Abstract
Background: Transthyretin cardiac amyloidosis (ATTR amyloidosis) is a frequent etiology of heart failure. Inflammation and mineral metabolism are associated with myocardial dysfunction and clinical performance. Cardiac global longitudinal strain (GLS) allows function assessment and is associated with prognosis. Our aim was to [...] Read more.
Background: Transthyretin cardiac amyloidosis (ATTR amyloidosis) is a frequent etiology of heart failure. Inflammation and mineral metabolism are associated with myocardial dysfunction and clinical performance. Cardiac global longitudinal strain (GLS) allows function assessment and is associated with prognosis. Our aim was to describe possible correlations between GLS, biomarker levels and clinical performance in ATTR amyloidosis. Methods: Thirteen patients with ATTR amyloidosis were included. Clinical characteristics; echocardiographic features, including strain assessment and 6 min walk test (6MWT); and baseline inflammatory, mineral metabolism and cardiovascular biomarker levels were assessed. Results: Of the 13 patients, 46.2% were women, and the mean age was 79 years. TAPSE correlated with NT-ProBNP (r −0.65, p < 0.05) and galectin-3 (r 0.76, p < 0.05); E/E’ ratio correlated with hsCRP (r 0.58, p < 0.05). Left ventricular GLS was associated with NT-ProBNP (r 0.61, p < 0.05) (patients have a better prognosis if the strain value is more negative) and left atrial GLS with NT-ProBNP (r −0.73, p < 0.05) and MCP1 (r 0.55, p < 0.05). Right ventricular GLS was correlated with hsTnI (r 0.62, p < 0.05) and IL6 (r 0.881 p < 0.05). Klotho levels were correlated with 6MWT (r 0.57, p < 0.05). Conclusions: While inflammatory biomarkers were correlated with cardiac function, klotho levels were associated with clinical performance in the population with TTR-CA. Full article
(This article belongs to the Section Cardiovascular Clinical Research)
15 pages, 6125 KiB  
Article
Subcranial Encephalic Temnograph-Shaped Helmet For Brain Stroke Monitoring
by Antonio Cuccaro, Angela Dell’Aversano, Bruno Basile, Maria Antonia Maisto and Raffaele Solimene
Sensors 2024, 24(9), 2887; https://doi.org/10.3390/s24092887 (registering DOI) - 30 Apr 2024
Abstract
In this contribution, a wearable microwave imaging system for real-time monitoring of brain stroke in the post-acute stage is described and validated. The system exploits multistatic/multifrequency (only 50 frequency samples) data collected via a low-cost and low-complexity architecture. Data are collected by an [...] Read more.
In this contribution, a wearable microwave imaging system for real-time monitoring of brain stroke in the post-acute stage is described and validated. The system exploits multistatic/multifrequency (only 50 frequency samples) data collected via a low-cost and low-complexity architecture. Data are collected by an array of only 16 antennas moved by pneumatic system. Phantoms, built from ABS material and filled with appropriate Triton X-100-based mixtures to mimic the different head human tissues, are employed for the experiments. The microwave system exploits the differential scattering measures and the Incoherent MUSIC algorithm to provide a 3D image of the region under investigation. The shown results, although preliminary, confirm the potential of the proposed microwave system in providing reliable results, including for targets whose evolution is as small as 16 mL in volume. Full article
17 pages, 4814 KiB  
Technical Note
Analysis of Multipath Changes in the Polish Permanent GNSS Stations Network
by Jacek Rapiński, Dariusz Tomaszewski and Renata Pelc-Mieczkowska
Remote Sens. 2024, 16(9), 1617; https://doi.org/10.3390/rs16091617 (registering DOI) - 30 Apr 2024
Abstract
This study examines the influence of multipath errors on Global Navigation Satellite System (GNSS) measurements collected at ASG-EUPOS reference stations between 2010 and 2021. Multipath occurs when GNSS signals reflect off surrounding objects before reaching the receiver antenna, leading to positioning errors. In [...] Read more.
This study examines the influence of multipath errors on Global Navigation Satellite System (GNSS) measurements collected at ASG-EUPOS reference stations between 2010 and 2021. Multipath occurs when GNSS signals reflect off surrounding objects before reaching the receiver antenna, leading to positioning errors. In the case of reference stations, all available mitigation techniques were used to minimize the impact of multipath. However, it is still detectable and affects the measurement results. For carrier phase differential positioning, it increases the ambiguous search space, which results in a decrease in determining rover—reference station vector accuracy. The study employs two linear combinations (Code-Minus-Carrier and Multipath Pseudorange Observable) to quantify the multipath effect on both pseudorange and carrier phase measurements. Based on the research, it was found that the multipath values changed depending on the change of the receiver and the terrain around the reference stations. The study observed a gradual decrease in multipath errors from 2010 to 2021, likely due to technological advancements in receiver design. No significant increase in multipath errors was observed due to environmental changes around the stations, suggesting a minimal influence from new reflecting objects nearby. Based on the analyses conducted, it is also recommended to perform periodic tests to detect incorrect receiver configuration or operation. Full article
(This article belongs to the Section Satellite Missions for Earth and Planetary Exploration)
25 pages, 1353 KiB  
Review
Review of Fuel-Cell Electric Vehicles
by Tingke Fang, Coleman Vairin, Annette von Jouanne, Emmanuel Agamloh and Alex Yokochi
Energies 2024, 17(9), 2160; https://doi.org/10.3390/en17092160 (registering DOI) - 30 Apr 2024
Abstract
This paper presents an overview of the status and future prospects of fuel-cell electric vehicles (FC-EVs). As global concerns about emissions escalate, FC-EVs have emerged as a promising substitute for traditional internal combustion engine vehicles. This paper discusses the fundamentals of fuel-cell technology [...] Read more.
This paper presents an overview of the status and future prospects of fuel-cell electric vehicles (FC-EVs). As global concerns about emissions escalate, FC-EVs have emerged as a promising substitute for traditional internal combustion engine vehicles. This paper discusses the fundamentals of fuel-cell technology considering the major types of fuel cells that have been researched and delves into the most suitable fuel cells for FC-EV applications, including comparisons with mainstream vehicle technologies. The present state of FC-EVs, ongoing research, and the challenges and opportunities that need to be accounted for are discussed. Furthermore, the comparison between promising proton-exchange membrane fuel cell (PEMFC) and solid oxide fuel cell (SOFC) technologies used in EVs provides valuable insights into their respective strengths and challenges. By synthesizing these aspects, the paper aims to provide a comprehensive understanding and facilitate decision-making for future advancements in sustainable FC-EV transportation, thereby contributing to the realization of a cleaner, greener, and more environmentally friendly future. Full article
(This article belongs to the Section E: Electric Vehicles)
10 pages, 2655 KiB  
Case Report
Mucin-Producing Lobular Breast Carcinoma Metastasis to an Ovarian Fibroma: Histopathological and Immunohistochemical Analysis of a Rare Case and Literature Review
by Alexandra Corina Faur, Camelia Vidiţa Gurban, Ecaterina Dăescu, Răzvan Vlad Tîrziu, Daniela Cornelia Lazăr and Laura Andreea Ghenciu
Diagnostics 2024, 14(9), 953; https://doi.org/10.3390/diagnostics14090953 (registering DOI) - 30 Apr 2024
Abstract
Breast cancer stands as the primary cause of cancer-related mortality among women worldwide, often presenting with distant metastases upon diagnosis. Ovarian metastases originating from breast cancer represent a range of 3–30% of all ovarian neoplasms. Case Report: Herein, we present the histopathological, histochemical, [...] Read more.
Breast cancer stands as the primary cause of cancer-related mortality among women worldwide, often presenting with distant metastases upon diagnosis. Ovarian metastases originating from breast cancer represent a range of 3–30% of all ovarian neoplasms. Case Report: Herein, we present the histopathological, histochemical, and immunohistochemical findings of a rare case involving mucin-producing lobular breast carcinoma metastasizing to an ovarian fibroma in an 82-year-old female previously diagnosed with lobular breast carcinoma. Histopathological examination of the excised tissues revealed a biphasic neoplasm characterized by tumor cells expressing AE-1/AE-3 cytokeratin, mammaglobin, GCDFP-15, inhibin, and calretinin. Positive mucin staining was observed using histochemical techniques, and reticulin fibers were demonstrated using the Gordon–Sweets technique. A final diagnosis of mucin-producing lobular breast carcinoma metastatic to a benign ovarian fibroma was rendered. Conclusion: The occurrence of metastatic breast carcinoma overlaid on an ovarian tumor represents a rare and diagnostically challenging scenario. Full article
(This article belongs to the Special Issue Advances in the Diagnosis and Management of Gynecological Oncology)
17 pages, 568 KiB  
Article
Joint Action of Trichoderma atroviride and a Vegetal Derived-Protein Hydrolysate Improves Performances of Woodland Strawberry in Italy
by Lorena Vultaggio, Enrica Allevato, Beppe Benedetto Consentino, Pietro Bellitto, Simona Napoli, Claudio Cannata, Georgia Ntatsi, Sonya Vasto, Sara Baldassano, Salvatore La Bella, Claudio Leto and Leo Sabatino
Horticulturae 2024, 10(5), 459; https://doi.org/10.3390/horticulturae10050459 (registering DOI) - 30 Apr 2024
Abstract
Woodland strawberry (Fragaria vesca L.) is an underutilized plant species that could benefit from the use of biostimulants to improve crop productivity and fruit quality. The scope of the present study was to appraise the influence of two biostimulants (Trichoderma atroviride [...] Read more.
Woodland strawberry (Fragaria vesca L.) is an underutilized plant species that could benefit from the use of biostimulants to improve crop productivity and fruit quality. The scope of the present study was to appraise the influence of two biostimulants (Trichoderma atroviride and plant protein hydrolysate)—used either alone or combined—on the plant performance and economic profitability of two woodland strawberry genotypes (‘Alpine’ and ‘Regina delle Valli’). Overall, data showed that ‘Alpine’ had the highest productive performances, whereas ‘Regina delle Valli’ revealed the highest fruit qualitative traits. T. atroviride inoculation and V-PH application significantly boosted plant marketable yield (+20.5% for T. atroviride and +12.9% for V-PH), total sugars (+1.9% for Trichoderma and +1.4% for V-PH) and anthocyanins (+14.1% for T. atroviride and +9.8% for V-PH) compared to non-treated plants. Plants supplied with both biostimulants had a higher marketable yield (+34.8%), mean fruit weight (+6.0%), fruit dry matter (+13.8%), total sugars (+3.5%), ascorbic acid (+12.7%), flavonoid (+26.3%) and anthocyanins (+29.9%) compared to non-treated plants. Furthermore, our study revealed that the highest fruit polyphenol concentration was recorded in both genotypes treated with the combination of biostimulants and in ‘Regina delle Valli’ sprayed with V-PH, whereas the highest antioxidant activity was found in ‘Regina delle Valli’ fruit when plants were supplied with both biostimulants. Our study pointed out that the application of microbial and non-microbial biostimulants, especially in combination, might be a useful strategy for improving the performances of underutilized species and, therefore, encouraging their cultivation, valorization and economic profitability (+6208.3 EUR /ha when plants were exposed to both biostimulants). Full article
(This article belongs to the Section Medicinals, Herbs, and Specialty Crops)
18 pages, 2079 KiB  
Article
Direct Numerical Modeling as a Tool for Optical Coherence Tomography Development: SNR (Sensitivity) and Lateral Resolution Test Target Interpretation
by Samuel Lawman and Yao-Chun Shen
Photonics 2024, 11(5), 419; https://doi.org/10.3390/photonics11050419 (registering DOI) - 30 Apr 2024
Abstract
Optical Coherence Tomography (OCT) is a growing family of biophotonic imaging techniques, but in the literature there is a lack of easy-to-use tools to universally directly evaluate a device’s theoretical performance for a given metric. Modern computing tools mean that direct numerical modeling [...] Read more.
Optical Coherence Tomography (OCT) is a growing family of biophotonic imaging techniques, but in the literature there is a lack of easy-to-use tools to universally directly evaluate a device’s theoretical performance for a given metric. Modern computing tools mean that direct numerical modeling can, from first principles, simulate the performance metrics of a specific device directly without relying on analytical approximations and/or complexities. Here, we present two different direct numerical models, along with the example MATLAB code for the reader to adapt to their own systems. The first model is of photo-electron shot noise at the detector, the primary noise source for OCT. We use this firstly to evaluate the amount of additional noise present (1.5 dB) for an experimental setup. Secondly, we demonstrate how to use it to precisely quantify the expected shot noise SNR limit difference between time-domain and Fourier-domain OCT systems in a given hypothetical experiment. The second model is used to demonstrate how USAF 1951 test chart images should be interpreted for a given lateral PSF shape. Direct numerical modeling is an easy and powerful basic tool for researchers and developers, the wider use of which may improve the rigor of the OCT literature. Full article
(This article belongs to the Special Issue Recent Progress in Biophotonics)
22 pages, 7291 KiB  
Article
3U CubeSat-Based Hyperspectral Remote Sensing by Offner Imaging Hyperspectrometer with Radially-Fastened Primary Elements
by Nikolay Ivliev, Vladimir Podlipnov, Maxim Petrov, Ivan Tkachenko, Maksim Ivanushkin, Sergey Fomchenkov, Maksim Markushin, Roman Skidanov, Yuriy Khanenko, Artem Nikonorov, Nikolay Kazanskiy and Viktor Soifer
Sensors 2024, 24(9), 2885; https://doi.org/10.3390/s24092885 (registering DOI) - 30 Apr 2024
Abstract
This paper presents findings from a spaceborne Earth observation experiment utilizing a novel, ultra-compact hyperspectral imaging camera aboard a 3U CubeSat. Leveraging the Offner optical scheme, the camera’s hyperspectrometer captures hyperspectral images of terrestrial regions with a 200 m spatial resolution and 12 [...] Read more.
This paper presents findings from a spaceborne Earth observation experiment utilizing a novel, ultra-compact hyperspectral imaging camera aboard a 3U CubeSat. Leveraging the Offner optical scheme, the camera’s hyperspectrometer captures hyperspectral images of terrestrial regions with a 200 m spatial resolution and 12 nanometer spectral resolution across a 400 to 1000 nanometer wavelength range, covering 150 channels in the visible and near-infrared spectrums. The hyperspectrometer is specifically designed for deployment on a 3U CubeSat nanosatellite platform, featuring a robust all-metal cylindrical body of the hyperspectrometer, and a coaxial arrangement of the optical elements ensures optimal compactness and vibration stability. The performance of the imaging hyperspectrometer was rigorously evaluated through numerical simulations prior to construction. Analysis of hyperspectral data acquired over a year-long orbital operation demonstrates the 3U CubeSat’s ability to produce various vegetation indices, including the normalized difference vegetation index (NDVI). A comparative study with the European Space Agency’s Sentinel-2 L2A data shows a strong agreement at critical points, confirming the 3U CubeSat’s suitability for hyperspectral imaging in the visible and near-infrared spectrums. Notably, the ISOI 3U CubeSat can generate unique index images beyond the reach of Sentinel-2 L2A, underscoring its potential for advancing remote sensing applications. Full article
(This article belongs to the Section Optical Sensors)
13 pages, 886 KiB  
Review
Bridging Genetic Insights with Neuroimaging in Autism Spectrum Disorder—A Systematic Review
by Joana Vilela, Célia Rasga, João Xavier Santos, Hugo Martiniano, Ana Rita Marques, Guiomar Oliveira and Astrid Moura Vicente
Int. J. Mol. Sci. 2024, 25(9), 4938; https://doi.org/10.3390/ijms25094938 (registering DOI) - 30 Apr 2024
Abstract
Autism Spectrum Disorder (ASD) is an early onset neurodevelopmental disorder characterized by impaired social interaction and communication, and repetitive patterns of behavior. Family studies show that ASD is highly heritable, and hundreds of genes have previously been implicated in the disorder; however, the [...] Read more.
Autism Spectrum Disorder (ASD) is an early onset neurodevelopmental disorder characterized by impaired social interaction and communication, and repetitive patterns of behavior. Family studies show that ASD is highly heritable, and hundreds of genes have previously been implicated in the disorder; however, the etiology is still not fully clear. Brain imaging and electroencephalography (EEG) are key techniques that study alterations in brain structure and function. Combined with genetic analysis, these techniques have the potential to help in the clarification of the neurobiological mechanisms contributing to ASD and help in defining novel therapeutic targets. To further understand what is known today regarding the impact of genetic variants in the brain alterations observed in individuals with ASD, a systematic review was carried out using Pubmed and EBSCO databases and following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. This review shows that specific genetic variants and altered patterns of gene expression in individuals with ASD may have an effect on brain circuits associated with face processing and social cognition, and contribute to excitation–inhibition imbalances and to anomalies in brain volumes. Full article
14 pages, 1075 KiB  
Article
New Insights into the Role of Thiol Collectors in Malachite Flotation
by Congren Yang, Siying Chen, Haodong Li and Wenqing Qin
Minerals 2024, 14(5), 483; https://doi.org/10.3390/min14050483 (registering DOI) - 30 Apr 2024
Abstract
Malachite is one of the most important copper-bearing oxide minerals; however, it shows poor floatability prior to sulfidization under the thiol collector system. This study investigated the reasons for the low recovery of malachite flotation without sulfidization. The results of adsorption capacity and [...] Read more.
Malachite is one of the most important copper-bearing oxide minerals; however, it shows poor floatability prior to sulfidization under the thiol collector system. This study investigated the reasons for the low recovery of malachite flotation without sulfidization. The results of adsorption capacity and contact angle test indicated that the malachite surface could adsorb a sufficient amount of the collector, obviously increasing the hydrophobicity of the malachite surface under static conditions. By measuring the amount of inorganic carbon in the flotation solution, it was found that the amount of inorganic carbon in the solution increased significantly when the thiol collectors were added into pulp, which could be attributed to the induced dissolution of the malachite surface by thiol collectors. Solubility tests further demonstrated that the copper ions released from the natural dissolution of malachite proved difficult in regard to reactions with thiol collector to form precipitates; however, the thiol collector induced the dissolution of malachite surface, and so the hydrophobic complexes’ copper-collector could not firmly adsorb on the mineral surface. Fourier transform infrared (FTIR) analysis revealed that thiol collectors do not adsorb stably on malachite surfaces. This was considered to be a substantial reason for the poor performance of malachite flotation without sulfidization. Full article
(This article belongs to the Section Mineral Processing and Extractive Metallurgy)
18 pages, 1441 KiB  
Article
Optimal Scheduling of Off-Site Industrial Production in the Context of Distributed Photovoltaics
by Sizhe Xie, Yao Li and Peng Wang
Energies 2024, 17(9), 2156; https://doi.org/10.3390/en17092156 (registering DOI) - 30 Apr 2024
Abstract
A reasonable allocation of production schedules and savings in overall electricity costs are crucial for large manufacturing conglomerates. In this study, we develop an optimization model of off-site industrial production scheduling to address the problems of high electricity costs due to the irrational [...] Read more.
A reasonable allocation of production schedules and savings in overall electricity costs are crucial for large manufacturing conglomerates. In this study, we develop an optimization model of off-site industrial production scheduling to address the problems of high electricity costs due to the irrational allocation of production schedules on the demand side of China’s power supply, and the difficulty in promoting industrial and commercial distributed photovoltaic (PV) projects in China. The model makes full use of the conditions of different PV resources and variations in electricity prices in different places to optimize the scheduling of industrial production in various locations. The model is embedded with two sub-models, i.e., an electricity price prediction model and a distributed photovoltaic power cost model to complete the model parameters, in which the electricity price prediction model utilizes a Long Short-Term Memory (LSTM) neural network. Then, the particle swarm optimization algorithm is used to solve the optimization model. Finally, the production data of two off-site pharmaceutical factories belonging to the same large group of enterprises are substituted into the model for example analysis, and it is concluded that the optimization model can significantly reduce the electricity consumption costs of the enterprises by about 7.9%. This verifies the effectiveness of the optimization model established in this paper in reducing the cost of electricity consumption on the demand side. Full article
(This article belongs to the Section A2: Solar Energy and Photovoltaic Systems)

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