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Regenerating Iron-Based Adsorptive Media Used for Removing Arsenic from Water 再生铁基吸附介质去除水中砷的研究
Technologies Pub Date : 2023-07-12 DOI: 10.3390/technologies11040094
Ilaria Ceccarelli, L. Filoni, Massimiliano Poli, C. Apollonio, A. Petroselli
{"title":"Regenerating Iron-Based Adsorptive Media Used for Removing Arsenic from Water","authors":"Ilaria Ceccarelli, L. Filoni, Massimiliano Poli, C. Apollonio, A. Petroselli","doi":"10.3390/technologies11040094","DOIUrl":"https://doi.org/10.3390/technologies11040094","url":null,"abstract":"Of all the substances that can be present in water intended for human consumption, arsenic (As) is one of the most toxic. Many treatment technologies can be used for removing As from water, for instance, adsorption onto iron media, where commercially available adsorbents are removed and replaced with new media when they are exhausted. Since this is an expensive operation, in this work, a novel and portable plant for regenerating iron media has been developed and tested in four real case studies in Central Italy. The obtained results highlight the good efficiency of the system, which was able, from 2019 to 2023, to regenerate the iron media and to restore its capability to adsorb the As from water almost entirely. Indeed, when the legal threshold value of 10 μg/L is exceeded, the regeneration process is performed and, after that, the As concentration in the water effluent is at the minimum level in all the investigated case studies.","PeriodicalId":22341,"journal":{"name":"Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87220011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
FPGA-Based Implementation of a New 3-D Multistable Chaotic Jerk System with Two Unstable Balance Points 基于fpga的新型双不稳定平衡点三维多稳定混沌激振系统实现
Technologies Pub Date : 2023-07-11 DOI: 10.3390/technologies11040092
S. Vaidyanathan, E. Tlelo-Cuautle, Khaled Benkouider, A. Sambas, Brisbane Ovilla-Martínez
{"title":"FPGA-Based Implementation of a New 3-D Multistable Chaotic Jerk System with Two Unstable Balance Points","authors":"S. Vaidyanathan, E. Tlelo-Cuautle, Khaled Benkouider, A. Sambas, Brisbane Ovilla-Martínez","doi":"10.3390/technologies11040092","DOIUrl":"https://doi.org/10.3390/technologies11040092","url":null,"abstract":"Mechanical jerk systems have applications in several areas, such as oscillators, microcontrollers, circuits, memristors, encryption, etc. This research manuscript reports a new 3-D chaotic jerk system with two unstable balance points. It is shown that the proposed mechanical jerk system exhibits multistability with coexisting chaotic attractors for the same set of system constants but for different initial states. A bifurcation analysis of the proposed mechanical jerk system is presented to highlight the special properties of the system with respect to the variation of system constants. A field-programmable gate array (FPGA) implementation of the proposed mechanical jerk system is given by synthesizing the discrete equations that are obtained by applying one-step numerical methods. The hardware resources are reduced by performing pipeline operations, and, finally, the paper concludes that the experimental results of the proposed mechanical jerk system using FPGA-based design show good agreement with the MATLAB simulations of the same system.","PeriodicalId":22341,"journal":{"name":"Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87098477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Implementation of Deep Learning Models on an SoC-FPGA Device for Real-Time Music Genre Classification 基于SoC-FPGA的深度学习模型在实时音乐类型分类中的实现
Technologies Pub Date : 2023-07-10 DOI: 10.3390/technologies11040091
Muhammad Faizan, Ioannis Intzes, I. Cretu, Hongying Meng
{"title":"Implementation of Deep Learning Models on an SoC-FPGA Device for Real-Time Music Genre Classification","authors":"Muhammad Faizan, Ioannis Intzes, I. Cretu, Hongying Meng","doi":"10.3390/technologies11040091","DOIUrl":"https://doi.org/10.3390/technologies11040091","url":null,"abstract":"Deep neutral networks (DNNs) are complex machine learning models designed for decision-making tasks with high accuracy. However, DNNs require high computational power and memory, which limits such models to fitting on edge devices, resulting in unnecessary processing delays and high energy consumption. Graphical processing units (GPUs) offer reliable hardware acceleration, but their bulky sizes prevent their utilization in portable equipment. System-on-chip field programmable gated arrays (SoC-FPGAs) provide considerable computational power with low energy consumption, making them ideal for edge computing applications, owing to their innovative, flexible, and small design. In this paper, we implement a deep-learning-based music genre classification system on a SoC-FPGA board, evaluate the model’s performance, and provide a comparative analysis across different platforms. Specifically, we compare the performance of long short-term memory (LSTM), convolutional neural networks (CNNs), and a hybrid model (CNN-LSTM) on an Intel Core i7-8550U by Intel Cooperation. The models are fed an acoustic feature called the Mel-frequency cepstral coefficient (MFCC) for training and testing (inference). Then, by using the advanced Vitis AI tool, a deployable version of the model is generated. The experimental results show that the execution speed is increased by 80%, and the throughput rises four times when the CNN-based music genre classification system is implemented on SoC-FPGA.","PeriodicalId":22341,"journal":{"name":"Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87161353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Characterization of Triplet State of Cyanine Dyes with Two Chromophores Effect of Molecule Structure 分子结构双发色团效应下菁染料三重态的表征
Technologies Pub Date : 2023-07-08 DOI: 10.3390/technologies11040090
I. Borissevitch, P. J. Gonçalves, L. P. Ferreira, A. Kostyukov, V. Kuzmin
{"title":"Characterization of Triplet State of Cyanine Dyes with Two Chromophores Effect of Molecule Structure","authors":"I. Borissevitch, P. J. Gonçalves, L. P. Ferreira, A. Kostyukov, V. Kuzmin","doi":"10.3390/technologies11040090","DOIUrl":"https://doi.org/10.3390/technologies11040090","url":null,"abstract":"Quantum yields (φT) and energies (ET) of the first triplet state T1 for four molecules of cyanine dyes with two chromophores (BCDs), promising photoactive compounds for various applications, for example, as photosensitizers in photodynamic therapy (PDT) and fluorescence diagnostics (FD), were studied in 1-propanol solutions by steady-state and time-resolved optical absorption techniques. BCDs differ by the structure of the central heterocycle, connecting the chromophores. The heterocycle structure is responsible for electron tunneling between chromophores, for which efficiency can be characterized by splitting of the BCD triplet energy levels. It was shown that the increase in the tunneling efficiency reduces ET values and increases φT values. This aspect is very promising for the synthesis of new effective photosensitizers based on cyanine dyes with two interacting chromophores for various applications, including photodynamic therapy.","PeriodicalId":22341,"journal":{"name":"Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73833159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Features of Metalorganic Chemical Vapor Deposition Selective Area Epitaxy of AlzGa1−zAs (0 ≤ z ≤ 0.3) Layers in Arrays of Ultrawide Windows 超宽窗口阵列中AlzGa1−zAs(0≤z≤0.3)层的金属有机化学气相沉积选择性面积外延特性
Technologies Pub Date : 2023-07-07 DOI: 10.3390/technologies11040089
V. Shamakhov, S. Slipchenko, D. Nikolaev, I. Soshnikov, Alexander Smirnov, I. Eliseyev, Artyom Grishin, Matvei Kondratov, A. Rizaev, N. Pikhtin, P. Kop’ev
{"title":"Features of Metalorganic Chemical Vapor Deposition Selective Area Epitaxy of AlzGa1−zAs (0 ≤ z ≤ 0.3) Layers in Arrays of Ultrawide Windows","authors":"V. Shamakhov, S. Slipchenko, D. Nikolaev, I. Soshnikov, Alexander Smirnov, I. Eliseyev, Artyom Grishin, Matvei Kondratov, A. Rizaev, N. Pikhtin, P. Kop’ev","doi":"10.3390/technologies11040089","DOIUrl":"https://doi.org/10.3390/technologies11040089","url":null,"abstract":"AlzGa1−zAs layers of various compositions were grown using metalorganic chemical vapor deposition on a GaAs substrate with a pattern of alternating SiO2 mask/window stripes, each 100 µm wide. Microphotoluminescence maps and thickness profiles of AlzGa1−zAs layers that demonstrated the distribution of the growth rate and z in the window were experimentally studied. It was shown that the layer growth rate and the AlAs mole fraction increased continuously from the center to the edge of the window. It was experimentally shown that for a fixed growth time of 10 min, as z increased from 0 to 0.3, the layer thickness difference between the center of the window and the edge increased from 700 Å to 1100 Å, and the maximum change in z between the center of the window and the edge reached Δz 0.016, respectively. Within the framework of the vapor -phase diffusion model, simulations of the spatial distribution of the layer thickness and z across the window were carried out. It was shown that the simulation results were in good agreement with the experimental results for the effective diffusion length D/k: Ga—85 µm, Al—50 µm.","PeriodicalId":22341,"journal":{"name":"Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87381813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Digital Technologies to Provide Humanization in the Education of the Healthcare Workforce: A Systematic Review 数字技术在医疗保健劳动力教育中提供人性化:系统综述
Technologies Pub Date : 2023-07-05 DOI: 10.3390/technologies11040088
María Gonzalez-Moreno, Carlos Monfort-Vinuesa, Antonio Piñas-Mesa, Esther Rincon
{"title":"Digital Technologies to Provide Humanization in the Education of the Healthcare Workforce: A Systematic Review","authors":"María Gonzalez-Moreno, Carlos Monfort-Vinuesa, Antonio Piñas-Mesa, Esther Rincon","doi":"10.3390/technologies11040088","DOIUrl":"https://doi.org/10.3390/technologies11040088","url":null,"abstract":"Objectives: The need to incentivize the humanization of healthcare providers coincides with the development of a more technological approach to medicine, which gives rise to depersonalization when treating patients. Currently, there is a culture of humanization that reflects the awareness of health professionals, patients, and policy makers, although it is unknown if there are university curricula incorporating specific skills in humanization, or what these may include. Therefore, the objectives of this study are as follows: (1) to identify what type of education in humanization is provided to university students of Health Sciences using digital technologies; and (2) determine the strengths and weaknesses of this education. The authors propose a curriculum focusing on undergraduate students to strengthen the humanization skills of future health professionals, including digital health strategies. Methods: A systematic review, based on the scientific literature published in EBSCO, Ovid, PubMed, Scopus, and Web of Science, over the last decade (2012–2022), was carried out in November 2022. The keywords used were “humanization of care” and “humanization of healthcare” combined both with and without “students”. Results: A total of 475 articles were retrieved, of which 6 met the inclusion criteria and were subsequently analyzed, involving a total of 295 students. Three of them (50%) were qualitative studies, while the other three (50%) involved mixed methods. Only one of the studies (16.7%) included digital health strategies to train humanization. Meanwhile, another study (16.7%) measured the level of humanization after training. Conclusions: There is a clear lack of empirically tested university curricula that combine education in humanization and digital technology for future health professionals. Greater focus on the training of future health professionals is needed, in order to guarantee that they begin their professional careers with the precept of medical humanities as a basis.","PeriodicalId":22341,"journal":{"name":"Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78253626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimizing EMG Classification through Metaheuristic Algorithms 基于元启发式算法的肌电分类优化
Technologies Pub Date : 2023-07-02 DOI: 10.3390/technologies11040087
Marcos Aviles, J. Rodríguez-Reséndíz, Danjela Ibrahimi
{"title":"Optimizing EMG Classification through Metaheuristic Algorithms","authors":"Marcos Aviles, J. Rodríguez-Reséndíz, Danjela Ibrahimi","doi":"10.3390/technologies11040087","DOIUrl":"https://doi.org/10.3390/technologies11040087","url":null,"abstract":"This work proposes a metaheuristic-based approach to hyperparameter selection in a multilayer perceptron to classify EMG signals. The main goal of the study is to improve the performance of the model by optimizing four important hyperparameters: the number of neurons, the learning rate, the epochs, and the training batches. The approach proposed in this work shows that hyperparameter optimization using particle swarm optimization and the gray wolf optimizer significantly improves the performance of a multilayer perceptron in classifying EMG motion signals. The final model achieves an average classification rate of 93% for the validation phase. The results obtained are promising and suggest that the proposed approach may be helpful for the optimization of deep learning models in other signal processing applications.","PeriodicalId":22341,"journal":{"name":"Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76720431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Enhancement of Handshake Attraction through Tactile, Visual, and Auditory Multimodal Stimulation 通过触觉、视觉和听觉多模态刺激增强握手吸引力
Technologies Pub Date : 2023-07-01 DOI: 10.3390/technologies11040086
Taishu Kumagai, Y. Nonomura
{"title":"Enhancement of Handshake Attraction through Tactile, Visual, and Auditory Multimodal Stimulation","authors":"Taishu Kumagai, Y. Nonomura","doi":"10.3390/technologies11040086","DOIUrl":"https://doi.org/10.3390/technologies11040086","url":null,"abstract":"“Handshaking parties,” where pop idols shake hands with fans, can be exciting. The multimodal stimulation of tactile, visual, and auditory sensations can be captivating. In this study, we presented subjects with stimuli eliciting three sensory responses: tactile, visual, and auditory sensations. We found that the attraction scores of subjects increased because they felt the smoothness and obtained a human-like sensory experience grasping a grip handle covered with artificial skin, faux fur, and abrasive cloth with their dominant hand as they looked at a picture of a pop idol or listened to a song. When no pictures or songs were presented, a simple feeling of slight warmth was correlated with the attraction score. Results suggest that multimodal stimuli alter tactile sensations and the feelings evoked. This finding may be useful for designing materials that activate the human mind through tactile sensation and for developing humanoid robots and virtual reality systems.","PeriodicalId":22341,"journal":{"name":"Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85617337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modernizing the Legacy Healthcare System to Decentralize Platform Using Blockchain Technology 使用区块链技术对传统医疗系统进行现代化改造,以实现去中心化平台
Technologies Pub Date : 2023-06-29 DOI: 10.3390/technologies11040084
A. Aljaloud, Abdul Razzaq
{"title":"Modernizing the Legacy Healthcare System to Decentralize Platform Using Blockchain Technology","authors":"A. Aljaloud, Abdul Razzaq","doi":"10.3390/technologies11040084","DOIUrl":"https://doi.org/10.3390/technologies11040084","url":null,"abstract":"The use of blockchain technology is expanding in various industries, including finance, supply chain management, food, energy, IoT, and healthcare. The article aims to address the challenges of complex medical procedures, large-scale medical data management, and cost optimization in the healthcare industry. By employing blockchain technology, the article aims to enhance data security and privacy while ensuring the integrity and efficiency of the healthcare system. This article focuses on the application of blockchain technology in the healthcare system by reviewing the existing literature and proposing multiple workflows for better data management. These workflows were implemented using the Ethereum blockchain platform and involve complex medical procedures such as surgery and clinical trials, as well as managing a large amount of medical data. The feasibility of the proposed system is analyzed in terms of associated costs, and a model-driven engineering approach is used to recover the architecture of traditional healthcare systems. The aim is to provide stakeholders in the healthcare system with better healthcare services and cost optimization. The solution being proposed automates interactions between different parties involved. Smart contracts were created using Solidity language, and their functions were tested using the Remix IDE. This paper illustrates that our smart contract code was designed to avoid common security vulnerabilities and attacks. To test the framework, a prototype of the smart contract was deployed on an Ethereum TESTNET blockchain in a Windows environment. This study found that the proposed approach is both practical and efficient.","PeriodicalId":22341,"journal":{"name":"Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88356703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Self-Directed and Self-Designed Learning: Integrating Imperative Topics in the Case of COVID-19 自主和自我设计学习:在COVID-19的情况下整合势在必行的主题
Technologies Pub Date : 2023-06-29 DOI: 10.3390/technologies11040085
A. Ebrahimi
{"title":"Self-Directed and Self-Designed Learning: Integrating Imperative Topics in the Case of COVID-19","authors":"A. Ebrahimi","doi":"10.3390/technologies11040085","DOIUrl":"https://doi.org/10.3390/technologies11040085","url":null,"abstract":"Self-directed learning and self-design became unexpectedly popular and common during the COVID-19 era. Learners are encouraged to take charge of their learning and, often the opportunity to independently design their learning experience. This research illustrates the use of technology in teaching and learning technology with a central theme of promoting self-directed learning with engaging self-design for both educators and learners. The technology used includes existing tools such as web page design, Learning Management Systems (LMS), project management tools, and basic programming foundations and concepts of big data and databases. In addition, end-users and developers can create their own tools with simple coding. Planning techniques, such as Visual Plan Construct Language with its embedded AI, are used to integrate course material and rubrics with time management. Educators may use project management tools instead. The research proposes a self-directed paradigm with self-designed resources using the existing technology with LMS modules, discussions, and self-tests. The research establishes its criteria for ensuring the quality of content and design, known as 7x2C. Additionally, other criteria for analysis, such as Design Thinking, are included. The approach is examined for a technology-based business course in creating an experiential learning system for COVID-19 awareness. Likewise, among other projects, an environment for educating learners about diabetes and obesity has been designed. The project is known as Sunchoke, which has a theme of Grow, Eat, and Heal. Educators can use their own content and rubrics to adapt this approach to their own customized teaching methods.","PeriodicalId":22341,"journal":{"name":"Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82490627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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