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The Impact of Using DPSK Modulation on the Performance of Transdermal Optical Wireless Communications under Pointing Errors 使用 DPSK 调制对指向错误下的透皮光学无线通信性能的影响
Pub Date : 2024-02-14 DOI: 10.3991/ijoe.v20i02.44627
Yazeed Suleiman Al-Rbeihat, Omar M. Hasan
The current paper explores the impact of misalignment between transceivers (referred to as pointing error (PE)) on the performance of transdermal optical wireless (TOW) technology, as indicated by average signal-to-noise ratio (SNR), outage probability (OP), outage rate (OR), and average ergodic capacity (AEC). This study was inspired by the effectiveness of differential phase shift keying (DPSK) in enhancing the reliability of the link in free-space optical communications (FSO). Furthermore, this enhancement was studied and analyzed in consideration of the impact of pointing errors. In particular, this paper presents a mathematical analysis that considers certain characteristics of the channel, limitations within the body, the pointing errors (PEs) between the transceivers, and other specific aspects of the optical unit. The results demonstrate the significant impact of PEs on the reliability of the TOW link and highlight the improvement provided by the DPSK technique. i.e., 3 dB better performance compared to the on-off keying (OOK) modulation technique. Finally, this research demonstrates the practical application of wireless optical technology in the medical field within the wavelength range of 800–1300 nm, with optimal performance observed around 1100 nm.
本文从平均信噪比(SNR)、中断概率(OP)、中断率(OR)和平均啮合容量(AEC)等方面探讨了收发器之间的不对准(称为指向误差(PE))对透皮光无线(TOW)技术性能的影响。这项研究的灵感来自差分相移键控(DPSK)在提高自由空间光通信(FSO)链路可靠性方面的有效性。此外,还考虑到指向误差的影响,对这种增强效果进行了研究和分析。本文特别提出了一种数学分析方法,考虑了信道的某些特性、机身内部的限制、收发器之间的指向误差(PE)以及光学装置的其他特定方面。结果表明,PE 对 TOW 链路的可靠性有重大影响,并突出了 DPSK 技术带来的改进,即与开关键控(OOK)调制技术相比,性能提高了 3 分贝。最后,这项研究证明了无线光学技术在 800-1300 nm 波长范围内的医疗领域的实际应用,在 1100 nm 波长附近观察到了最佳性能。
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引用次数: 0
Machine Learning System for the Effective Diagnosis and Survival Prediction of Breast Cancer Patients 用于有效诊断和预测乳腺癌患者生存期的机器学习系统
Pub Date : 2024-02-14 DOI: 10.3991/ijoe.v20i02.42883
Arturo Gago, Jean Marko Aguirre, Lenis Wong
Breast cancer is one of the most significant global health challenges. Effective diagnosis and prognosis prediction are crucial for improving patient outcomes in the case of this disease. As machine learning (ML) has significantly improved prediction models in many disciplines, the goal of this study is to develop a ML system for medical specialists that can accurately predict tumor diagnosis and patient survival for breast cancer patients. For the training of diagnosis and survival prediction, five algorithmic models—decision tree (DT), random forest (RF), naive bayes (NB), support vector machines (SVMs), and gradient boosting—were trained with 569 records from the Breast Cancer Wisconsin dataset and 1,980 records from the Breast Cancer Gene Expression Profiles dataset. The results showed that the NB model exhibited better performance for tumor diagnosis, achieving an accuracy of 95.0%, while RF presented the best results for patient survival, with an accuracy of 76.0%. A survey of medical experts’ experience with the resulting system showed high scores in reliability, performance, satisfaction, usability, and efficiency, confirming that ML systems have the potential to improve breast cancer patient outcomes.
乳腺癌是全球健康面临的最重大挑战之一。有效的诊断和预后预测对于改善这种疾病的患者预后至关重要。由于机器学习(ML)在许多学科中都极大地改进了预测模型,因此本研究的目标是为医学专家开发一种 ML 系统,以准确预测乳腺癌患者的肿瘤诊断和生存期。在诊断和生存预测的训练中,使用了五种算法模型--决策树(DT)、随机森林(RF)、奈夫贝叶斯(NB)、支持向量机(SVM)和梯度提升--对威斯康星乳腺癌数据集的 569 条记录和乳腺癌基因表达谱数据集的 1,980 条记录进行了训练。结果表明,NB 模型在肿瘤诊断方面表现更佳,准确率达到 95.0%,而 RF 模型在患者存活率方面表现最佳,准确率达到 76.0%。对医学专家使用该系统的经验进行的调查显示,该系统在可靠性、性能、满意度、可用性和效率方面都获得了很高的分数,这证实了 ML 系统具有改善乳腺癌患者预后的潜力。
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引用次数: 0
Transforming Healthcare Data Management: A Blockchain-Based Cloud EHR System for Enhanced Security and Interoperability 变革医疗保健数据管理:基于区块链的云电子病历系统可增强安全性和互操作性
Pub Date : 2024-02-14 DOI: 10.3991/ijoe.v20i02.45693
A. Samala, Soha Rawas
The adoption of cloud-based electronic health record (EHR) systems and blockchain technology in healthcare is gaining attention for enhancing data security and interoperability. This research focuses on designing and implementing a blockchain-based cloud EHR system. It explores selecting suitable blockchain technology, cloud infrastructure, and data management methods to ensure patient data confidentiality, integrity, and availability. The architecture and components of the system, including the blockchain network, cloud storage layer, and user interface, are thoroughly discussed. A pilot study evaluates the system’s feasibility and performance, showcasing improved data protection, sharing, and management compared to traditional EHR systems. The potential benefits, drawbacks, and barriers to adoption of a blockchain-based cloud EHR system are examined. This research provides valuable insights and recommendations for healthcare institutions considering the implementation of such systems, addressing the challenges, and offering guidance for successful adoption.
在医疗保健领域采用基于云的电子健康记录(EHR)系统和区块链技术,以提高数据安全性和互操作性,正受到越来越多的关注。本研究侧重于设计和实施基于区块链的云电子病历系统。它探讨了如何选择合适的区块链技术、云基础设施和数据管理方法,以确保患者数据的保密性、完整性和可用性。深入讨论了系统的架构和组件,包括区块链网络、云存储层和用户界面。一项试点研究评估了该系统的可行性和性能,展示了与传统电子病历系统相比,该系统在数据保护、共享和管理方面的改进。研究还探讨了采用基于区块链的云电子病历系统的潜在好处、缺点和障碍。这项研究为考虑实施此类系统的医疗机构提供了宝贵的见解和建议,应对了挑战,并为成功采用提供了指导。
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引用次数: 0
Static, Dynamic, and High Cycle Fatigue Analysis of Crossed Spherical Gearing for Robotic Arm Ball Joint: A Finite Element Analysis Approach 机器人手臂球形关节交叉球面齿轮的静态、动态和高循环疲劳分析:有限元分析方法
Pub Date : 2024-02-14 DOI: 10.3991/ijoe.v20i02.46817
José L. Serna-Landivar, Madelaine Violeta Risco Sernaqué, Ana Beatriz Rivas Moreano, William C. Algoner, Daniela M. Anticona-Valderrama, Walter Enrique Zúñiga Porras, Carlos Oliva Guevara
Crossed spherical gearing is used in the joints of robotic arm prostheses and allows mobility in 3 degrees of freedom. This paper aims to evaluate the design of a cross-spherical gear with three different materials, PEEK, AISI 304L, and Ti-6Al-4V, for a robotic arm prosthesis by finite element analysis. ANSYS mechanical software (version 2021 R1) was used to perform the static analysis and evaluate the deformations and stresses, modal analysis of natural frequencies and vibration modes, and high cycle fatigue analysis to determine fatigue resistance. The results obtained in the static analysis show that the maximum stresses are in the same zones for the three materials and have similar values. However, the Ti-6Al-4V and ASI 304L materials have a higher safety factor than PEEK, with a value of 5.17. In conclusion, the crossed spherical gearing is numerically validated using the finite element analysis so that the prototype can be later manufactured at an experimental level, and the values obtained for the crossed spherical gearing of the robotic arm prosthesis can be verified.
交叉球形齿轮用于机械手臂假肢的关节,可实现 3 个自由度的移动。本文旨在通过有限元分析,评估采用 PEEK、AISI 304L 和 Ti-6Al-4V 三种不同材料的交叉球形齿轮在机械臂假肢中的设计。ANSYS 机械软件(2021 R1 版)用于进行静态分析,评估变形和应力,对固有频率和振动模式进行模态分析,以及进行高循环疲劳分析以确定抗疲劳性。静态分析结果表明,三种材料的最大应力位于相同区域,且应力值相似。不过,Ti-6Al-4V 和 ASI 304L 材料的安全系数高于 PEEK,达到 5.17。总之,利用有限元分析对交叉球形齿轮进行了数值验证,以便以后在实验水平上制造原型,并验证机械臂假肢交叉球形齿轮所获得的数值。
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引用次数: 0
Study of Free Fall Using an Ultra-Concurrent Laboratory at the University 利用大学超电流实验室研究自由落体运动
Pub Date : 2024-02-14 DOI: 10.3991/ijoe.v20i02.43099
Eduardo Arias Navarro, Cesar Nahuel Moya, Fiorella Lizano-Sánchez, Carlos Arguedas-Matarrita, César Eduardo Mora Ley, Ignacio Idoyaga
This article presents the results of the educational use of an ultra-concurrent laboratory during the second semester of 2022, in the Cisale Chair of the Common Cycle of the University of Buenos Aires in order to strengthen the experimental scenarios and quality of the process in the teaching of physics. For this purpose, a quantitative descriptive study in which 68 students participated was carried out. This allowed establishing a significant scenario with the implementation of the ultra-concurrent free-fall laboratory to enhance experimental development in physics teaching processes. It is concluded that remote laboratories are promising technologies for teaching physics at the university level. However, it should be clarified that the impact of an educational innovation does not only depend on the technology used, but also on the didactic design with which it is approached.
本文介绍了布宜诺斯艾利斯大学共同周期 Cisale 教席在 2022 年第二学期使用超导实验室进行教学的结果,目的是加强物理教学过程中的实验场景和质量。为此,开展了一项有 68 名学生参与的定量描述性研究。研究结果表明,在物理教学过程中,通过实施超高速自由落体实验室来加强实验发展,可以建立一个重要的实验场景。研究得出结论,远程实验室是大学物理教学中大有可为的技术。不过,需要说明的是,教育创新的影响不仅取决于所使用的技术,还取决于教学设计。
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引用次数: 0
The Impact of Using DPSK Modulation on the Performance of Transdermal Optical Wireless Communications under Pointing Errors 使用 DPSK 调制对指向错误下的透皮光学无线通信性能的影响
Pub Date : 2024-02-14 DOI: 10.3991/ijoe.v20i02.44627
Yazeed Suleiman Al-Rbeihat, Omar M. Hasan
The current paper explores the impact of misalignment between transceivers (referred to as pointing error (PE)) on the performance of transdermal optical wireless (TOW) technology, as indicated by average signal-to-noise ratio (SNR), outage probability (OP), outage rate (OR), and average ergodic capacity (AEC). This study was inspired by the effectiveness of differential phase shift keying (DPSK) in enhancing the reliability of the link in free-space optical communications (FSO). Furthermore, this enhancement was studied and analyzed in consideration of the impact of pointing errors. In particular, this paper presents a mathematical analysis that considers certain characteristics of the channel, limitations within the body, the pointing errors (PEs) between the transceivers, and other specific aspects of the optical unit. The results demonstrate the significant impact of PEs on the reliability of the TOW link and highlight the improvement provided by the DPSK technique. i.e., 3 dB better performance compared to the on-off keying (OOK) modulation technique. Finally, this research demonstrates the practical application of wireless optical technology in the medical field within the wavelength range of 800–1300 nm, with optimal performance observed around 1100 nm.
本文从平均信噪比(SNR)、中断概率(OP)、中断率(OR)和平均啮合容量(AEC)等方面探讨了收发器之间的不对准(称为指向误差(PE))对透皮光无线(TOW)技术性能的影响。这项研究的灵感来自差分相移键控(DPSK)在提高自由空间光通信(FSO)链路可靠性方面的有效性。此外,还考虑到指向误差的影响,对这种增强效果进行了研究和分析。本文特别提出了一种数学分析方法,考虑了信道的某些特性、机身内部的限制、收发器之间的指向误差(PE)以及光学装置的其他特定方面。结果表明,PE 对 TOW 链路的可靠性有重大影响,并突出了 DPSK 技术带来的改进,即与开关键控(OOK)调制技术相比,性能提高了 3 分贝。最后,这项研究证明了无线光学技术在 800-1300 nm 波长范围内的医疗领域的实际应用,在 1100 nm 波长附近观察到了最佳性能。
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引用次数: 0
Ischemic Stroke Classification Using VGG-16 Convolutional Neural Networks: A Study on Moroccan MRI Scans 使用 VGG-16 卷积神经网络进行缺血性中风分类:摩洛哥核磁共振成像扫描研究
Pub Date : 2024-02-14 DOI: 10.3991/ijoe.v20i02.44845
Wafae Abbaoui, Sara Retal, Soumia Ziti, Brahim El Bhiri, Hassan Moussif
This study presents a comprehensive exploration of deep learning models for precise brain ischemic stroke classification using medical data from Morocco. Following the OSEMN approach, our methodology leverages transfer learning with the VGG-16 architecture and employs data augmentation techniques to enhance model performance. Our developed model achieved a remarkable validation accuracy of 90%, surpassing alternative state-of-theart models (ResNet50: 87.0%, InceptionV3: 82.0%, VGG-19: 81.0%). Notably, all models were rigorously evaluated on the same meticulously curated dataset, ensuring fair and consistent comparisons. The investigation underscores VGG-16’s superior performance in distinguishing stroke cases, highlighting its potential as a robust tool for accurate diagnosis. Comparative analyses among popular deep learning architectures not only demonstrate our model’s efficacy but also emphasize the importance of selecting the right architecture for medical image classification tasks. These findings contribute to the growing evidence supporting advanced deep learning techniques in medical imaging. Achieving a validation accuracy of 90%, our model holds significant promise for real-world healthcare applications, showcasing the critical role of cutting-edge technologies in advancing diagnostic accuracy and the transformative potential of deep learning in the medical field.
本研究利用摩洛哥的医疗数据,对用于精确脑缺血中风分类的深度学习模型进行了全面探索。按照 OSEMN 方法,我们的方法利用 VGG-16 架构的迁移学习,并采用数据增强技术来提高模型性能。我们开发的模型的验证准确率高达 90%,超过了其他先进模型(ResNet50:87.0%;InceptionV3:82.0%;VGG-19:81.0%)。值得注意的是,所有模型都在同一个精心策划的数据集上进行了严格评估,确保了比较的公平性和一致性。这项调查强调了 VGG-16 在区分中风病例方面的卓越性能,凸显了其作为准确诊断的强大工具的潜力。流行的深度学习架构之间的比较分析不仅证明了我们模型的功效,还强调了为医学图像分类任务选择正确架构的重要性。这些发现为医学影像中支持高级深度学习技术的证据越来越多做出了贡献。我们的模型达到了 90% 的验证准确率,在现实世界的医疗保健应用中大有可为,展示了前沿技术在提高诊断准确率方面的关键作用,以及深度学习在医疗领域的变革潜力。
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引用次数: 0
Therapy and Emotional Support through a Chatbot 通过聊天机器人提供治疗和情感支持
Pub Date : 2024-02-14 DOI: 10.3991/ijoe.v20i02.45377
L. Andrade-Arenas, Cesar Yactayo-Arias, Félix Pucuhuayla-Revatta
In the context of advancing technological development, chatbots have emerged as an innovative tool in the field of mental health, offering new possibilities to provide therapy and emotional support in an accessible and convenient manner. The aim of this study was to develop and evaluate a chatbot implemented in a web application designed to provide emotional support to an adult population, specifically targeting young people and adults over the age of 18. The research focused on user satisfaction with the chatbot experience. Using a qualitative approach and non-random convenience sampling, we collected feedback on the chatbot’s performance from 15 users through an online questionnaire. The results showed a positive assessment, with an average satisfaction score of 4.09 on a scale of 1 to 5. The participants expressed their approval of the emotional support provided by the chatbot, emphasizing the sense of understanding and trust generated by the therapeutic interventions and emotional support. In conclusion, this study successfully assessed user satisfaction with the emotional support chatbot, emphasizing its significance in the realm of digital mental health. The scope of this study was solely focused on user satisfaction. For future research, it is recommended to expand the scope to investigate the correlation between user satisfaction and therapeutic outcomes. Additionally, there is a need to tailor these systems to meet the specific emotional requirements of diverse user groups and enhance the efficacy of mental health patient care.
在技术不断发展的背景下,聊天机器人已成为心理健康领域的一种创新工具,为以便捷的方式提供治疗和情感支持提供了新的可能性。本研究的目的是开发和评估一个聊天机器人,该机器人安装在一个网络应用程序中,旨在为成年人群提供情感支持,特别是针对 18 岁以上的年轻人和成年人。研究重点是用户对聊天机器人体验的满意度。我们采用定性方法和非随机便利抽样,通过在线问卷收集了 15 位用户对聊天机器人性能的反馈意见。结果显示了积极的评价,平均满意度为 4.09(1-5 分)。参与者对聊天机器人提供的情感支持表示认可,强调了治疗干预和情感支持所产生的理解感和信任感。总之,本研究成功地评估了用户对情感支持聊天机器人的满意度,强调了它在数字心理健康领域的重要性。本研究的范围仅集中于用户满意度。在未来的研究中,建议扩大研究范围,调查用户满意度与治疗效果之间的相关性。此外,还需要对这些系统进行定制,以满足不同用户群体的特定情感需求,提高心理健康患者护理的效率。
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引用次数: 0
Transforming Healthcare Data Management: A Blockchain-Based Cloud EHR System for Enhanced Security and Interoperability 变革医疗保健数据管理:基于区块链的云电子病历系统可增强安全性和互操作性
Pub Date : 2024-02-14 DOI: 10.3991/ijoe.v20i02.45693
A. Samala, Soha Rawas
The adoption of cloud-based electronic health record (EHR) systems and blockchain technology in healthcare is gaining attention for enhancing data security and interoperability. This research focuses on designing and implementing a blockchain-based cloud EHR system. It explores selecting suitable blockchain technology, cloud infrastructure, and data management methods to ensure patient data confidentiality, integrity, and availability. The architecture and components of the system, including the blockchain network, cloud storage layer, and user interface, are thoroughly discussed. A pilot study evaluates the system’s feasibility and performance, showcasing improved data protection, sharing, and management compared to traditional EHR systems. The potential benefits, drawbacks, and barriers to adoption of a blockchain-based cloud EHR system are examined. This research provides valuable insights and recommendations for healthcare institutions considering the implementation of such systems, addressing the challenges, and offering guidance for successful adoption.
在医疗保健领域采用基于云的电子健康记录(EHR)系统和区块链技术,以提高数据安全性和互操作性,正受到越来越多的关注。本研究侧重于设计和实施基于区块链的云电子病历系统。它探讨了如何选择合适的区块链技术、云基础设施和数据管理方法,以确保患者数据的保密性、完整性和可用性。深入讨论了系统的架构和组件,包括区块链网络、云存储层和用户界面。一项试点研究评估了该系统的可行性和性能,展示了与传统电子病历系统相比,该系统在数据保护、共享和管理方面的改进。研究还探讨了采用基于区块链的云电子病历系统的潜在好处、缺点和障碍。这项研究为考虑实施此类系统的医疗机构提供了宝贵的见解和建议,应对了挑战,并为成功采用提供了指导。
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引用次数: 0
Assessing Subjective Visual Vertical Reliability: A Comparison of the “Bucket Test,” a Mobile App, and a Virtual System 评估主观视觉垂直可靠性:水桶测试"、移动应用程序和虚拟系统的比较
Pub Date : 2024-02-14 DOI: 10.3991/ijoe.v20i02.45981
Mohammed Waly, Fahad Alshammari, Maryam E. Alshammari, Mohammed Algahtany
The subjective visual vertical (SVV) is a potential indicator of vestibular dysfunction as it assesses an individual’s perception of a vertical line. Despite this, and as a result of specific logistical impediments, SVV has not entered standard clinical practice. Dizziness is the third most common clinical complaint by patients (20%) in outpatient offices. It adversely affects the patient’s life and is often accompanied by intensive healthcare. This study aims to determine whether the bucket test and mobile phone app are as reliable as the Virtual SVV system in assessing the SVV. This study involves four types of investigation to determine the relationship or difference among three tests, including their performance comparison, descriptive analysis, one-way ANOVA test, receiver operating characteristic (ROC) curve, and correlation analysis. After organizing the raw data from 207 healthy volunteer participants for 8 trials, it was found that 59% were female and 41% were male. The data was analyzed utilizing the SPSS program. The test performance is measured using the ROC curve, and the results indicate that the bucket with the highest ROC coefficient is 0.72.
主观视觉垂直度(SVV)是前庭功能障碍的一个潜在指标,因为它评估的是个人对垂直线的感知。尽管如此,由于特定的后勤障碍,SVV 尚未进入标准临床实践。头晕是门诊患者第三大常见的临床主诉(20%)。它对患者的生活造成了不利影响,而且往往伴随着密集的医疗服务。本研究旨在确定水桶测试和手机应用在评估 SVV 方面是否与虚拟 SVV 系统一样可靠。本研究通过四种类型的调查来确定三种测试之间的关系或差异,包括它们的性能比较、描述性分析、单因素方差分析、接收者操作特征曲线(ROC)和相关性分析。在整理了 207 名健康志愿者参加 8 次试验的原始数据后,发现 59% 为女性,41% 为男性。数据使用 SPSS 程序进行分析。使用 ROC 曲线衡量测试性能,结果表明 ROC 系数最高的桶为 0.72。
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引用次数: 0
期刊
International Journal of Online and Biomedical Engineering (iJOE)
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