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Control systems in renewable energy: A review of applications in Canada, USA, and Africa 可再生能源控制系统:加拿大、美国和非洲的应用回顾
Pub Date : 2024-01-30 DOI: 10.30574/wjaets.2024.11.1.0011
Onyinyechukwu Chidolue, Cosmas Dominic Daudu, Valentine Ikenna Illojianya, Adetomilola Victoria Fafure, Kenneth Ifeanyi Ibekwe, Bright Ngozichukwu
This research explores the applications of control systems in renewable energy across Canada, the United States, and Africa. It underscores their pivotal role in optimizing efficiency and reliability by examining supervisory, predictive, and adaptive control strategies. The literature review delves into global and regional renewable energy landscapes, emphasizing unique challenges and opportunities. Technological innovations, including advanced monitoring, artificial intelligence, and blockchain, are investigated, highlighting their transformative impact. The paper anticipates prospects such as quantum computing, decentralized systems, and heightened cybersecurity measures. The findings contribute to understanding the nuanced interplay between control systems and renewable energy, offering insights for policymakers, researchers, and industry stakeholders as they navigate the evolving landscape of sustainable energy solutions.
本研究探讨了控制系统在加拿大、美国和非洲可再生能源领域的应用。通过研究监督、预测和自适应控制策略,强调了控制系统在优化效率和可靠性方面的关键作用。文献综述深入探讨了全球和地区可再生能源状况,强调了独特的挑战和机遇。研究了包括先进监控、人工智能和区块链在内的技术创新,强调了它们的变革性影响。本文预测了量子计算、去中心化系统和加强网络安全措施等前景。这些研究结果有助于理解控制系统与可再生能源之间微妙的相互作用,为政策制定者、研究人员和行业利益相关者在不断发展的可持续能源解决方案中提供了真知灼见。
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引用次数: 0
Evaluation of the cyber security models implemented across common attack vectors: A review of literature 评估针对常见攻击载体实施的网络安全模型:文献综述
Pub Date : 2024-01-30 DOI: 10.30574/wjaets.2024.11.1.0023
Afra Ansaria
Cybersecurity is an organizational issue that should be looked at through the lens of various stakeholders. However, it is often treated as a siloed issue in which more is always seen as better. The CISOs, CIOs, and the key decision-makers struggle to understand how much security is enough. Cybersecurity solutions, referred to as controls, more often than not result in a residual risk. To assess this risk better, the security controls should be studied in further detail. The objective of this paper is to educate the audience with the various cyber security controls being used in the academia and in the industry. In order to circumvent the security issues faced by large organization, the tradeoffs of each controls should be studied further. The paper is meant to provide a balanced view providing the positive and the critical aspect of implementing some of the known security solutions. There is no one perfect formula when it comes to selecting security controls. However, picking a security control that are in line with the users’ needs will help reduce some of the risks associated with implementing the controls. An optimal solution requires a balanced approach towards the risk, cost, and benefit of the solution. The aim of the paper is to help the reader assess some of risks and the tradeoff associated with the security controls being practiced in the industry today.
网络安全是一个组织问题,应从各利益相关方的角度加以审视。然而,网络安全往往被视为一个孤立的问题,总是越多越好。首席信息安全官(CISO)、首席信息安全官(CIO)和主要决策者都很难理解多少安全才是足够的。被称为控制措施的网络安全解决方案往往会带来残余风险。为了更好地评估这种风险,应进一步详细研究安全控制措施。本文旨在向读者介绍学术界和业界使用的各种网络安全控制措施。为了规避大型组织面临的安全问题,应进一步研究每种控制措施的利弊得失。本文旨在提供一个平衡的视角,提供实施一些已知安全解决方案的积极和关键方面。在选择安全控制时,没有一个完美的公式。不过,选择符合用户需求的安全控制措施,将有助于降低与实施控制措施相关的一些风险。最佳解决方案需要在风险、成本和效益之间取得平衡。本文旨在帮助读者评估一些风险以及与当前行业中实施的安全控制相关的权衡。
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引用次数: 0
Biomedical waste management and their effects on the Environment: A review 生物医学废物管理及其对环境的影响:综述
Pub Date : 2024-01-30 DOI: 10.30574/wjaets.2024.11.1.0020
Qaissar Guti Omo, Najmaldin Ezaldin Hassan
Biomedical waste has the potential to be hazardous and cause environmental pollution, therefore its proper management and disposal, especially in hospitals and healthcare facilities, plays an important role in protecting both the environment and public health. Biomedical waste encompasses a diverse array of materials originating from patient care, research activities, and medical interventions, and inadequate handling poses significant hazards. Common disposal methods, such as incineration, have been associated with environmental contamination and the emission of harmful fumes. Biomedical waste poses health risks through the spread of infectious diseases, particularly via sharps injuries, and the release of toxic compounds into the environment. The hazardous category includes infectious, potentially hazardous, and radioactive waste, with around 10% of hospital waste deemed infectious according to the World Health Organization. Various disposal techniques, including burning, autoclaving, microwaving, shredding, landfilling, and chemical treatments, are employed globally, each with its own benefits and limitations. In this review, a classification of the various categories of biomedical waste and its effects, treatment and disposal methods are discussed. In summary, the substantial impact of biomedical waste on the environment and public health necessitates careful handling and adherence to regulations. The implementation of sustainable waste management practices, promotion of recycling, and adoption of innovative technologies are essential for mitigating the adverse effects of biomedical waste on the environment and local communities.
生物医学废物具有潜在的危害性,会造成环境污染,因此,对其进行适当的管理和处置,尤其是在医院和医疗保健设施中,对保护环境和公众健康起着重要作用。生物医学废物包括来自病人护理、研究活动和医疗干预的各种材料,处理不当会造成严重危害。焚烧等常见的处置方法与环境污染和有害烟雾的排放有关。生物医疗废物会传播传染病,特别是通过利器伤人,并向环境释放有毒化合物,从而对健康造成危害。危险废物包括传染性废物、潜在危险废物和放射性废物,根据世界卫生组织的数据,约有 10%的医院废物被视为传染性废物。全球采用的各种处理技术包括焚烧、高压灭菌、微波、粉碎、填埋和化学处理,每种技术都有各自的优点和局限性。本综述讨论了生物医疗废物的各种分类及其影响、处理和处置方法。总之,生物医疗废物对环境和公众健康有重大影响,因此必须谨慎处理并遵守相关法规。实施可持续废物管理方法、促进回收利用和采用创新技术,对于减轻生物医疗废物对环境和当地社区的不利影响至关重要。
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引用次数: 0
Multiple frequency steps in synthetic antiferromagnet based double spin josephson junctions using CoFeB and Fe3Sn 使用 CoFeB 和 Fe3Sn 合成基于反铁磁体的双自旋约瑟夫森结中的多频率阶跃
Pub Date : 2024-01-15 DOI: 10.30574/wjaets.2024.11.1.0022
Md. Rakibul Karim Akanda
Superconducting quantum interference device (SQUID) which is made of two parallel Josephson junctions has applications in magnetometry. A similar spin-based device is proposed here where spin superfluid in ferromagnet (FM) mimics the superconducting state. Two materials CoFeB and Fe3Sn are used for spin superfluid-based SQUID like device where easy plane anisotropy in CoFeB can be engineered and Fe3Sn has inherent easy plane anisotropy. Frequency varies in spin based proposed devices. Frequency increases and again decreases with the increase in both applied magnetic field and applied spin current. The proposed device can be used as nano oscillator and detector. The frequency in the proposed device shows multiple frequency steps which can be used for neuromorphic applications.
超导量子干涉装置(SQUID)由两个平行的约瑟夫森结组成,可应用于磁测量领域。这里提出了一种类似的基于自旋的设备,即在铁磁体(FM)中模拟超导状态的自旋超流体。CoFeB 和 Fe3Sn 两种材料被用于基于自旋超流体的 SQUID 类似装置,其中 CoFeB 易于平面各向异性设计,而 Fe3Sn 具有固有的易于平面各向异性。基于自旋的拟议器件的频率各不相同。频率随着外加磁场和外加自旋电流的增加而增加,然后又随着外加磁场和外加自旋电流的增加而降低。该器件可用作纳米振荡器和探测器。拟议器件中的频率显示出多个频率阶跃,可用于神经形态应用。
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引用次数: 0
Machine learning based object tracking 基于机器学习的物体追踪
Pub Date : 2024-01-15 DOI: 10.30574/wjaets.2024.11.1.0021
Md. Rakibul Karim Akanda, Joshua Reynolds, Treylin Jackson, Milijah Gray
Machine learning based object detection as well as tracking that object have been performed in this paper. The authors were able to set a range of interest (ROI) around an object using Open Computer Vision, better known as OpenCV. Next a tracking algorithm has been used to maintain tracking on an object while simultaneously operating two servo motors to keep the object centered in the frame. Detailed procedure and code are included in this paper.
本文进行了基于机器学习的物体检测和跟踪。作者利用开放式计算机视觉(即 OpenCV)在物体周围设置了一个兴趣范围(ROI)。接下来,作者使用了一种跟踪算法来保持对物体的跟踪,同时操作两个伺服电机来保持物体在画面中的中心位置。本文包含详细的程序和代码。
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引用次数: 0
Dosimetric verification of radiotherapy treatment planning system at TMSS Cancer Center, Bogura, Bangladesh 孟加拉国博古拉 TMSS 癌症中心放射治疗计划系统的剂量测定验证
Pub Date : 2023-12-30 DOI: 10.30574/wjaets.2023.10.2.0289
Mehrab Hassan Udoy, Rajada Khatun, Mokhlesur Rahman, Motiur Rahman, Fajle Rabby, Shirin Akter
Authentication of TPS is the component of the QA program for RTPS and planning process. So, verification of dose calculation algorithm is essential to measure the efficiency of the dose calculations. The goal is to assess how far the dosage measured deviates from the dose predicted by the treatment planning system (TPS) algorithm using a CIRS Thorax phantom. It has been done to measure the dosimetric variations of 6MV, 10MV and 15MV photon beams. The phantom was initially scanned using a CT-simulator, and the raw data from the gated scans were then exported to TPS to perform the planning. Using this planning, the phantom was irradiated for four different cases. The computed dose was then compared with the measured dose to ensure TPS validity. The findings demonstrate that the variation between the measured doses in altered holes of the CIRS thorax phantom and the calculated doses by TPS was within the allowed limit except few points of four cases. Max. and Min. deviations for 6MV were 3.87% and 0.05% respectively. On the other hand, Max. and Min. deviations for 10MV were 7.87% and 0.12% respectively and that for 15MV are 4.44% and 0.02% respectively. Satisfactory results were obtained for lung and bone substitute. The results demonstrate the accuracy of the doses determined by the treatment planning system algorithm using a thorax phantom, and they also demonstrate the competency of using the phantom for regular verification. In case of external beam radiation therapy with AAA algorithm, the CIRS Thorax Phantom is suitable for dose computation in heterogeneous medium. However it is more compatible for 6MV than 10MV and 15MV.
TPS 验证是 RTPS 质量保证计划和规划流程的组成部分。因此,剂量计算算法的验证对于衡量剂量计算的效率至关重要。我们的目标是使用 CIRS 胸腔模型来评估测量的剂量与治疗计划系统(TPS)算法预测的剂量偏差有多大。这项工作的目的是测量 6MV、10MV 和 15MV 光子束的剂量变化。首先使用 CT 模拟器对模型进行扫描,然后将选通扫描的原始数据导出到 TPS,以执行规划。利用该规划,对模型进行了四种不同情况的照射。然后将计算剂量与测量剂量进行比较,以确保 TPS 的有效性。研究结果表明,除了四个病例中的少数几个点外,CIRS 胸部模型改变孔中的测量剂量与 TPS 计算剂量之间的差异都在允许范围内。6MV 的最大和最小偏差分别为 3.87% 和 0.05%。另一方面,10MV 的最大和最小偏差分别为 7.87% 和 0.12%,15MV 的最大和最小偏差分别为 4.44% 和 0.02%。肺替代物和骨替代物的结果令人满意。这些结果表明,使用胸腔模型的治疗计划系统算法所确定的剂量是准确的,同时也证明了使用模型进行定期验证的能力。在使用 AAA 算法进行体外放射治疗时,CIRS 胸部模型适用于异质介质中的剂量计算。不过,与 10MV 和 15MV 相比,它与 6MV 更为兼容。
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引用次数: 0
Mock leno weave design-preparation on jute cotton union fabric 仿纱罗织造设计--黄麻棉联合织物上的准备工作
Pub Date : 2023-12-30 DOI: 10.30574/wjaets.2023.10.2.0299
Khaled Saifullah, Zakaria Ahmed, Mohammad Maniruzzaman
In the Weaving department of the Mechanical Processing Division of the Bangladesh Jute Research Institute, Dhaka, the characteristics of union fabric made of jute and cotton with a fancy weave design were investigated. The goal of this study is to create jute-cotton union fabric with a Mock leno weave pattern for a variety of applications. 10/2 cotton yarn was used for the warp, while 17 lbs/spy jute yarn was utilized by the weft. The elaborate union fabric was created using a Mock leno weave pattern with a repeat size of 12 by 12.
位于达卡的孟加拉国黄麻研究所机械加工部的织造部门研究了花式编织设计的黄麻棉联合织物的特性。这项研究的目标是制作出具有莫克纱罗织纹图案的黄麻-棉联合织物,用于多种用途。经纱采用 10/2 棉纱,纬纱采用 17 磅/支的黄麻纱。精心制作的联合织物采用了重复尺寸为 12 x 12 的模拟纱罗织纹。
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引用次数: 0
Laboratory preparation of LSM and LSF sputtering targets using PTFE rings for deposition of SOFC thin film electrodes 使用聚四氟乙烯环实验室制备用于沉积 SOFC 薄膜电极的 LSM 和 LSF 溅射靶材
Pub Date : 2023-12-30 DOI: 10.30574/wjaets.2023.10.2.0310
Ramin Babazadeh Dizaj, Nastaran Sabahi
The manufacturing of sputtering targets diverges from the conventional methods in ceramic processing, primarily because the quantities produced are frequently limited. The application of hot-press in this scenario significantly simplifies the sputter target fabrication process, allowing precise control over both target density and dimensions during pressing. However, without a hot press, the fabrication necessitates substantial preliminary efforts, which may be challenging to justify due to the restricted production volume. This study utilizes polytetrafluoroethylene (PTFE) rings as compaction dies filled with powders. Subsequently, the die is deformed between parallel platens, effectively compacting the powders. The method relies on the characteristic that the pressing results in minimal change in the internal diameter of the ring. This approach was exemplified through the creation of 2-inch (La0.5Sr0.5) MnO3-δ (LSM) and (La0.8Sr0.2) FeO3-δ (LSF) targets, where the deformable die was sized based on preliminary experiments involving smaller-diameter PTFE rings. The outcome of this fabrication process successfully produced sputter targets with high density, well within the tolerances of the sputter gun. Further tests involved using the prepared targets for the successful deposition of thin film LSM-LSF composite cathodes for SOFC applications.
溅射靶材的制造有别于陶瓷加工的传统方法,主要是因为其生产数量往往有限。在这种情况下,热压技术的应用大大简化了溅射靶材的制造过程,可以在压制过程中精确控制靶材的密度和尺寸。但是,如果没有热压机,制作过程就需要大量的前期工作,而由于产量有限,要证明这些前期工作的合理性可能具有挑战性。本研究利用聚四氟乙烯(PTFE)环作为填充粉末的压实模具。随后,模具在平行压盘之间变形,从而有效压实粉末。这种方法的特点是压制过程中环的内径变化极小。这种方法通过制造 2 英寸(La0.5Sr0.5)MnO3-δ(LSM)和(La0.8Sr0.2)FeO3-δ(LSF)靶来体现,其中可变形模具的尺寸是根据涉及较小直径聚四氟乙烯环的初步实验确定的。这一制造工艺的结果是成功制造出了高密度的溅射靶材,其密度远在溅射枪的公差范围之内。进一步的测试包括使用制备的靶材成功沉积薄膜 LSM-LSF 复合阴极,用于 SOFC 应用。
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引用次数: 0
Privacy and security issues in smart grids: A survey 智能电网的隐私和安全问题:调查
Pub Date : 2023-12-30 DOI: 10.30574/wjaets.2023.10.2.0306
Ogweno Jeremiah Okeyo
Smart grids have emerged as a transformative technology in the energy sector, enabling efficient electricity management, improved reliability, and integration of renewable energy sources. The necessity to promote smart grid (SG) has been recognized with a strong consensus. The SG integrates electrical grids and communication infrastructures and forms an intelligent electricity network working with all connected components to deliver sustainable electricity supplies. Many advanced communication technologies have been identified for SG applications with a potential to significantly enhance the overall efficiency of power grids. However, the widespread deployment of smart grids raises concerns about the privacy and security of the data collected and transmitted by these systems. To address these concerns, this paper proposes a comprehensive framework for ensuring privacy and security in smart grid systems. This framework includes encryption techniques, access control mechanisms, and robust authentication protocols. Additionally, this paper discusses the importance of user awareness and education in mitigating privacy and security risks. The research contributes to the existing literature on smart grid privacy and security by providing insights specific to the information technology security domain. The findings of this manuscript will be valuable for policymakers, energy providers, and researchers working towards the development of secure and privacy-preserving smart grid systems.
智能电网已成为能源领域的一项变革性技术,可实现高效的电力管理、提高可靠性和整合可再生能源。推广智能电网(SG)的必要性已得到广泛认同。智能电网将电网和通信基础设施整合在一起,形成一个智能电网,与所有相连的组件协同工作,提供可持续的电力供应。许多先进的通信技术已被确定用于 SG 应用,并有可能显著提高电网的整体效率。然而,智能电网的广泛部署引发了人们对这些系统所收集和传输数据的隐私和安全的担忧。为了解决这些问题,本文提出了一个确保智能电网系统隐私和安全的综合框架。该框架包括加密技术、访问控制机制和强大的身份验证协议。此外,本文还讨论了用户意识和教育在降低隐私和安全风险方面的重要性。这项研究为现有的智能电网隐私与安全文献做出了贡献,提供了信息技术安全领域的独特见解。本手稿的研究成果对致力于开发安全和保护隐私的智能电网系统的政策制定者、能源供应商和研究人员都很有价值。
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引用次数: 0
Estimating the effect of exchange rate fluctuations on general index of stock prices in Khartoum stock exchange using GARCH model (2004-2019) 利用 GARCH 模型估算汇率波动对喀土穆证券交易所股票价格总指数的影响(2004-2019 年)
Pub Date : 2023-12-30 DOI: 10.30574/wjaets.2023.10.2.0124
Almahdi Musa Attahir Musa, Anas Gareeb Allah Ahmed
The study aimed to estimate the effect of exchange rate fluctuations on the general index of stock prices in the Khartoum Stock Exchange using the general conditional variance models. The study problem was formulated in the following main question: What is the effect of exchange rate fluctuations on the general index of stock prices in the Khartoum Stock Exchange? The study was built on the following main hypothesis: There is a statistically significant relationship between exchange rate fluctuations and the general index of stock prices in the Khartoum Stock Exchange. The study followed the quantitative standard approach using the general conditional variance models and the ordinary least squares. The study found a direct relationship between exchange rate fluctuations and the general index of stock prices in the Khartoum Stock Exchange. The study recommended the adoption of effective macroeconomic policies to reduce the exchange rate and support it with production to reflect positively on the general performance of the Khartoum Stock Exchange Index, which increases opportunities and potentials for local and foreign investment.
本研究旨在利用一般条件方差模型估算汇率波动对喀土穆证券交易所股票价格总指数的影响。研究问题由以下主要问题构成:汇率波动对喀土穆证券交易所股票价格总指数有何影响?本研究基于以下主要假设:汇率波动与喀土穆证券交易所股票价格总指数之间存在统计意义上的重大关系。研究采用了一般条件方差模型和普通最小二乘法的定量标准方法。研究发现,汇率波动与喀土穆证券交易所股票价格总指数之间存在直接关系。研究建议采取有效的宏观经济政策来降低汇率,并通过生产来支持汇率,以积极反映喀土穆证券交易所指数的总体表现,从而增加本地和外国投资的机会和潜力。
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引用次数: 0
期刊
World Journal of Advanced Engineering Technology and Sciences
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