bluuebunny/crossref_metadata_2025 huggingface dataset:
Detecting tomato leaf diseases with convolutional neural networks and image processing using a Sri Lankan tomato leaf dataset
Authors: NS Wisidagama  , FMMT Marikar  , M Sirisuriya
Published: August 2024

Crops like tomatoes are vital to farmers' livelihoods in Sri Lanka, where agriculture is a key economic pillar. But growing tomatoes comes with a lot of difficulties, not the least of which is the possibility of certain diseases that can destroy crops. The timely implementation of interventions and reduction of losses are contingent upon the early discovery of these disorders. Using convolutional neural networks (CNNs) and image processing techniques, this study offers a novel solution to this problem by detecting tomato leaf illnesses. One unique aspect of this study is the use of a custom dataset made up of photos of Sri Lankan tomato leaves from several farms in Embilipitiya, Suriyawewa an area noted for being susceptible to several tomato illnesses. The dataset includes a variety of disease categories that are common in the local agricultural setting, such as tomato early blight, tomato Septoria leaf spot, tomato curl, and tomato leaf minor. The quality of the dataset is improved using pre-processing methods including segmentation and picture enhancement. The dataset is then used to train a CNN architecture for the purpose of classifying diseases. The efficiency of the suggested method is demonstrated by the experimental findings, which show that it can accurately identify and classify tomato leaf diseases. The system that has been built provides an automated and effective tool for early disease diagnosis, which facilitates timely intervention and efficient management approaches. Utilising a localised dataset improves the system's resilience and adaptability, which makes it ideal for implementation in Sri Lankan tomato farms.
市政工程施工技术通病与改进措施
Authors: 贠 海鹏
Published: August 2024

城市建设离不开市政工程，其是社会经济发展的重要基础设施。在市政工程项目实施阶段，施工技术应用问题较为常见，致使工程整体效果受到影响。因此为提高市政工程施工质量和水平，应该深入分析施工技术通病，了解问题成因，合理制定施工技术改进措施，加强技术应用及质量管理，保证市政工程建设质量在达到标准的同时，工程项目能安全且顺利实施。
浅谈人防工程暖通空调设计
Authors: 李 玲
Published: August 2024

当前国际形势正在发生深刻的变化。和平与发展仍然是当今时代的主题。世界多极化和经济全球化在曲折中持续发展。总体和平、局部战争，总体缓和、局部紧张，总体稳定、局部动荡，将是今后一个时期国际局势的基本态势。对于我国来说，正处于和平年代，战争离我们很远，但是目前的国际形势也使得我国对于战备要求仍然很严格，人民防空地下室工程的建设影响着国家的安危，对于保护人民的生命财产安全有着非比寻常的意义。文中着重于对人防工程中暖通空调设计的探讨，介绍了现阶段人防设计的重要性和必要性，暖通空调专业平站结合的设计要点，用设计实例着重对战时通风系统设计、计算和设备选型等问题进行了阐述。
建筑工程项目管理中的施工现场管理与优化措施分析
Authors: 韩 延升
Published: August 2024

建筑行业在国民经济中占有重要地位,为社会发展做出了重要贡献。正因如此,提升建筑工程施工过程管理和现场安全管理的质量显得尤为重要,其有利于缩短工程施工周期,降低安全事故发生的频率,促使各方主体获得更多的经济效益,为建筑行业的良性发展提供助力。相关工作人员在开展施工过程管理和现场安全管理时,应当注重将其与工程实际情况进行深度融合。
花篮式悬挑脚手架施工技术研究
Authors: 姚 献
Published: August 2024

随着社会发展和科技水平的不断提高，工程建设领域也在不断创新，新工艺、新材料、新技术、新设备等不断的涌现。花篮式悬挑脚手架作为一种新型悬挑脚手架，近年来常被应用于工程中。文中结合项目现场施工，对花篮式悬挑脚手架施工技术进行了研究和探讨，相关总结和介绍供今后类似工程参考。
水文地质岩土工程勘察设计及施工实践分析
Authors: 赵 毓
Published: August 2024

水文地质勘察是地质工程勘察中一项非常关键的内容，直接影响到地质工程的质量和安全。为更好地提高岩土工程的安全性能，做好水文地质的研究和分析工作，具有重要的现实意义。我国幅员辽阔，部分地区水文地质条件复杂，这些方面工作若不能加强质量管理，很容易对工程项目的可靠性和安全性造成危害，甚至造成安全生产事故。在地质工程勘察中，必须高度重视水文地质的必要性，对其进行客观评价和分析，为建设工程设计和工程建设提供准确的信息内容依据，防止地下水问题危害工程项目，从源头上保证工程建设质量总体目标的完成。
全过程造价咨询在建筑工程项目中的管理角色作用探讨
Authors: 于 建国
Published: August 2024

近年来，随着我国经济的逐步发展，我们越来越重视现代化的城市建设，缩小了城乡之间的差距，有效地促进了我国的建设。现在的建筑工程也在逐步的朝着多元化的方向发展，比如 PPP、工程总承包等。为改善施工质量，促进企业技术进步，提升企业经济效益，我国应建立相应的管理体系。建设市场和建设单位要加大建设管理力度，降低工程造价，增加经济效益。文章着重探讨了施工项目全过程成本咨询的管理角色和功能。
复杂地质条件下的建筑地基处理优化措施探讨
Authors: 李 林林
Published: August 2024

在我国经济快速发展的今天，我国的城市规划和建设已逐渐成为人们关注的焦点。走在大街上，看着这座城市的历史，感受着它的文明。在这个都市里，人们每天都会受到都市的习惯的影响，而这些习惯在心理上被称为“群体潜意识”。他们不知道自己的身体在发生着什么，也不知道自己身边的城市正在飞速地发展着。而在这座都市的建造中，也必须要有专家、工程师、设计师的共同合作，共同营造出一座更美好的都市。一所城市最出名的可能是一幢高大的建筑物。文中所讨论的问题是，在地基施工中，怎样进行最优的治理，以使地基更加安全可靠，具有较高的经济价值。
绿色建筑材料在土木工程施工的应用探析
Authors: 杨 陈杰 , 翁 佳勇
Published: August 2024

随着经济的发展，环境问题日益突出。为减少温室气体排放，为应对全球气温升高问题，节能减排成为各行各业的责任。建筑行业作为碳排放的主要来源之一，更要做好节能减排措施。通过在施工中积极地发展、应用绿色建筑材料显得非常重要，但我国目前在土木施工中的绿色建筑材料的应用与普及程度尚不高。加强对绿色建筑材料的研究与应用推广迫在眉睫。
建筑工程施工中深基坑支护的施工技术的探讨
Authors: 胡 俊男
Published: August 2024

由于土地面积的局限性以及人们对于城市居住需求的增多，我国建筑高度持续攀升，城市建筑规划中多以高层建筑为主，这对深基坑支护技术应用的标准化、功能的完善程度提出了更高的要求。基坑深度越深，其存在的风险越高，但受限于场地面积，工程施工时不能采取放坡式基坑开挖，为减少甚至消除安全隐患，高层建筑工程的基坑支护方式逐渐多样化。基坑支护是一种专项施工技术，可保证建筑地下结构施工、基坑侧壁及周围环境的安全，能提高建筑的整体安全性及平稳性。文中从高层建筑工程深基坑支护的注意事项出发，对其支护施工技术的选择依据及具体运用进行分析。
矿石化验技术的发展及应用
Authors: 田 素
Published: August 2024

我国是矿产大国，具有丰富的矿产资源。矿业生产建设的一大重要目的就是尽可能提取出更有益且优质的矿产资源，这也对矿石采样制样及相关化验技术提出了更高的要求。在矿业生产建设的发展过程中，我国的矿石化验技术不断革新换代，为了更积极的测试分析效果不断优化提升，向前发展。为了进一步展开对矿石的有效分析，满足矿石的化验处理分析需要，此文对矿石化验技术的发展及应用展开简要的分析研究，以期为行业发展提供一定参考。
无人机航空摄影测量技术在地形测绘中的实践分析
Authors: 张 澄
Published: August 2024

在地形测绘工程中，测量是基础性的环节之一，测量的数据是否准确，直接关系着工程后续能否顺利有序的开展。而在工程建设的过程中，由于建设环境复杂，测量难度大，因此，为了保证数据的准确性，就给测量技术提出了更高的要求。如果仍然采用传统的测量手段进行测量，则很难发挥出测量的真正作用，因此，必须要引进先进的技术手段，对于测量工作进行优化。而将无人机航空摄影测量技术应用到地形测绘的建设中，能够全面提升测量工作的效率，获取的数据也更加全面和准确，能够为地形测绘的建设奠定良好的基础。
公路桥梁设计中的桩基沉降问题分析
Authors: 罗 开勇
Published: August 2024

目前，我国的桥梁工程建设迅猛发展，其数量和规模都在不断扩大，桩基作为桥梁基础的主要受力构件，其质量的好坏直接影响整个桥梁结构的安全。在此背景下，文中通过对公路桥梁设计中桩基沉降问题进行简要分析，结合公路桥梁桩基沉降问题产生的原因、影响因素等对公路桥梁设计中桩基沉降的解决措施进行探讨，帮助桥梁设计人员提高设计水平。
水文地质勘察中地下水的问题及对策
Authors: 张 锐 , 萨 茹拉
Published: August 2024

水文地质勘察是保护和合理利用地下水资源的重要手段。在水文地质勘察中，存在着地下水的开采问题和地下水的循环和补给问题。对于地下水的开采问题，需要制定科学合理的地下水开采方案，建立地下水资源管理制度，加强地下水资源的调查和评价，并鼓励节水型社会建设。对于地下水的循环和补给问题，需要加强地下水调查和评价，建立地下水调蓄和提升系统，保护自然水源，开展人工补给等措施，以保障地下水资源的安全和可持续利用。
道路桥梁施工中预应力的应用及存在的问题探析
Authors: 刘 浩
Published: August 2024

在各地区经济发展及人们工作生活中道路桥梁起着重要的作用，同时道路桥梁工程也关系到城乡建设，为人们出行提供了最大的便利，因此应在进行道路桥梁工程施工的过程中应重点强调工程管理，最大限度提升道路桥梁工程结构的稳定性，为人们出行提供安全保障。目前在进行道路桥梁工程施工过程中多会采用预应力施工技术，在应用预应力施工技术后可以提升道路桥梁结构的稳定性及承载能力，同时预应力技术的加固作用较好可以提升道路桥梁工程使用安全。因此在进行道路桥梁工程施工过程中采用预应力施工技术时应对整体使用过程进行严格管理并对应用过程中的问题进行分析，制定有针对性的处理措施，进一步体现预应力技术在道路桥梁工程中的作用，保证道路桥梁工程建设质量与使用安全。
凌云县沙里至彩架村排涝隧洞工程地质条件分析与评价
Authors: 顾 城
Published: August 2024

拟建排涝隧洞工程位于喀斯特强岩溶发育地区，岩溶地质问题较为复杂。采取地质测绘、钻探等多种手段查明了工程区的地质条件，并对隧洞主要工程地质问题进行评价，提出相应的处理措施建议，能为岩溶发育地区长隧洞的勘察提供参考。
精细化管理在建筑工程管理中的应用分析
Authors: 周 淼
Published: August 2024

随着我国社会和经济的飞速发展，建筑领域也迎来了前所未有的机会和风险，同时建筑工程的发展也逐渐成为我国社会经济发展的重要组成部分。但是建筑工程管理过程中却仍然出现一定等问题，最明显的问题就在于工程管理工作的滞后性问题。因此，为了适应建筑工程发展需要，精细化管理方式已经逐渐成为当前建筑工程管理中的一种重要方式。以下通过对精细化管理在建筑工程管理中的应用意义、概述以及现状等进行论述，并提出相应的精细化管理措施，希望为工程管理提供借鉴。
环境监测在水环境污染治理中的作用及措施
Authors: 李 蜻蛉
Published: August 2024

文章主要探讨了环境监测在水环境污染治理中的作用及相应的措施。首先，介绍了水环境污染的概念和对人类和自然环境的危害，以及环境监测的基本概念和目的。其次，阐述了环境监测在水环境污染治理中的重要作用，包括对污染源的定位、对污染程度的监测、对治理效果的评估等方面。然后，分别从水体监测、污染源监测、治理效果监测、环境监管和信息公开等五个方面探讨了环境监测在水环境污染治理中的具体措施，包括建立完善的水环境监测体系、加强污染源的监管、提高治理效果的监测和评估水平、加强环境监管和加强信息公开和舆情监测等。最后，总结了环境监测在水环境污染治理中的重要性和必要性，并指出环境监测在今后水环境污染治理中的发展趋势和应用前景。
顶管技术在市政给排水施工中的有效应用研究
Authors: 陆 程
Published: August 2024

我国经济得到了进一步发展，外加城乡一体化的建设脚步更为加快，这使得市政工程建设的强度得到了持续化提升，推动了城市化发展的步伐得到加快。在各种各样的市政工程项目之中，极其重要的一大内容在于给排水环节，这一环节和国民的日常生产生活有着直接性的联系。然而，就当下来看，诸多给排水工程所在的区域有着比较密集的人口，对传统开挖施工方式进行运用，势必会严重不良影响周围的交通以及城市的运营建设。对于顶管技术来说，其在市政建设当中得到了比较良好的成效，这一技术不需要对地面进行开挖，在结合顶管设备之下，能够使得安装排水管道得到落实，从而大大降低影响环境的程度，并且能够使得经济损耗得到有效减少。
建筑工程中施工安全管理问题和对策的解析
Authors: 戴 威
Published: August 2024

近年来我国建筑行业发展迅速，建筑施工安全管理工作是建筑行业健康发展的基石，是建筑安全使用的重要保证。想要保障建筑行业健康稳定发展，必须对安全工作加以重视，分析和研究安全管理工作中突出的问题，不断优化和调整安全管理措施，提升安全管理工作质量。安全管理工作质量的提升能够为施工人员提供安全的施工环境，从而保障其生命健康安全，使施工作业有序开展。作为建筑工程领域中的一员，施工单位应积极承担自身在整个行业发展中的责任，不断优化安全管理工作方法，全面保障施工作业安全。
市政道路工程排水管道设计要点探析
Authors: 吴 青
Published: August 2024

随着经济社会的快速发展，城市人口密集程度也逐步加深，在新时代进程推动下，整体社会对基础建设有了更大的需求。现如今，工业用水量逐步增长，在城市发展中出现的用水供求关系产生了很大的矛盾，国家大力提倡合理排水要求下如何更好地推动市政道路工程排水管道设计项目的顺利进行，在这种思考背景下节约资源，提高效率，最终一步步提升市政工程企业经济效益。响应国家号召，企业才能稳定发展。因此市政的排水系统必须进行合理设计，才能在一定程度提高人们的生活质量。文中借此对现阶段市政道路中排水系统管道设计做出了一系列探究及分析。
沥青道路施工技术在市政道路建设中的应用研讨
Authors: 杨 佳佳
Published: August 2024

文中主要介绍了沥青道路施工技术在市政道路建设中的应用。首先，介绍了沥青道路施工技术的优势，探讨了沥青道路施工技术的适用范围，包括不同区域、不同路段的适用情况，以及沥青路面材料的性能要求。然后，对沥青道路施工技术在市政道路建设中存在的问题进行了深入分析，介绍了在市政道路建设中沥青路面材料的改进与研发、施工工艺的改进与优化以及绿色施工理念的推广和应用，旨在提高市政道路建设的施工质量，促进市政道路建设的可持续发展。
市政道路桥梁施工质量通病预防处理
Authors: 孙 明
Published: August 2024

随着社会经济高速发展，道路桥梁作为基础设施建设越来越受到关注。质量问题是道路桥梁施工的核心问题，只有提高到路桥施工质量控制意识，深入分析实际施工质量通病问题，制定有针对性的预防与处理对策，才能有效避免质量缺陷，提高道路桥梁整体质量，为人们出行提供安全保障，进而推动城市和社会经济发展。
“The basics of Russian nationhood” primer – the project of RANEPA NRU students within the information and library space
Authors:   Nizhny Novgorod Institute of Management–Affiliated with the Russian Presidential Academy of National Economy and Public Administration, Ivanova Elena V.
Published: August 2024

The author discusses the experience of teaching the new discipline, namely “The basics of Russian nationhood” at the university. She characterized the specific features of the discipline, the approaches to students’ R&D organization in the information and library space. The effectiveness of the format (the primer) is assessed. The author concludes on the potential of proposed approaches and solutions.
Arts’ invading the modern scientific library: The case study of RNPLS&T (non-book exhibitions)
Authors:   Russian National Public Library for Science and Technology, Platonova Maria A.
Published: August 2024

The author argues that arts in the libraries within specialized non-book exhibitions make the new vector of cultural and leisure activities of the scientific libraries which extends the user experience.
The pedagogue, scholar, humanist (on the occasion of 90-th anniversary of A. V. Sokolov)
Authors:   Russian Academy of Sciences Library, Ponomareva Nina V.
Published: August 2024

Arkady Vasilyevich Sokolov – Dr. Sc. in Pedagogy, Professor, an outstanding library and bibliography scholar, father of the scientific school of informatics, prominent master and pedagogue, historian and promoter of science, and public figure. On the occasion of his anniversary, the biobibliographical index was published embracing his academic and pedagogical works. The author analyzes the index materials to illustrate the legacy of this amazing person.
The Office of Library Studies of the Russian Academy of Sciences Library in social media
Authors:   Russian Academy of Sciences Library, Samara Lyudmila O.
Published: August 2024

The author discusses the activity of the RASL Office of Library Studies (RASL OLS) in social media, in particular, its efforts to build VKontakte [Russian social network]community. The RASL OLS collection determines the subject scope of the resource. The author provides examples of the columns, discusses the content, and illustrates it with VKontakte scans. She analyzes the VK resource in the whole: its functions, user audience, and usage statistics. Based on the big resource information capacity and increasing traffic, the author concludes on the resource sustainability.
Neural networks and artificial intelligence in science, education and in libraries: Do we really need them?
Authors:   Russian National Public Library for Science and Technology, Shrayberg Yakov L.
Published: August 2024

The author discusses several aspects of modern AI-based systems, and primarily, the neural networks. Many experts expect the AI-based systems to support libraries and academic organizations in building single library information and educational space and connecting libraries and universities for efficient information sharing and co-use in the common digital environment. The author provides examples of AI-based systems in Russian and foreign libraries. He concludes that we need AI in our libraries. However, he argues that foremost, the libraries need efficient automated library information systems (ALIS), e-catalogs, bibliographical formats and essential applications.
The VINITI RAS information resources for scientific research
Authors:   All-Russian Institute for Scientific and Technical Information, Danilina Yaroslava V.
Published: August 2024

Developing the socio-economic system in the Russian Federation based on the extended reproduction of innovations in every sphere of life has become the matter of safeguarding the sovereignty due to the changing geopolitical circumstances. However, the information support of the innovation process actors has still been the challenge for the national economy. Therefore, further development of the State System of Sci-tech Information, its structure, principles, designing its new elements and improving the existing ones, and networking them, make the most relevant problems to be addressed. The author discusses the VINITI RAS digital resources to support scientific research and all stages of innovation processes, and to facilitate information sharing between GSNTI units.
Intellectual property management resources of non-profit organizations
Authors:   Federal Institute of Industrial Property, Evdokimova Maya I.
Published: August 2024

The intellectual property (IP) is the main driver of technological and economical development. The institutes have to build the IP management system and to specify its assessment criteria. The author examines the IP role in companies’ capitalization and in achieving efficiency goals by research and educational organizations. For this purpose, she analyzes the resources and specifics of scitech knowledge search and processing. The paper is prepared within the R&D FIPS 5-EP-2024 “Development of efficient mechanisms for managing intellectual property in medicine: Theory and practice”.
RATING ANALYSIS OF THE DYNAMICS OF FOREIGN DIRECT INVESTMENT IN UKRAINE
Authors: Lyzhnyk Yu. B. , Bocharova Yu. H. Yu. H. , Pidhalnyi A. S.
Published: August 2024

Objective. The objective of the article is to conduct a rating analysis of the dynamics of direct foreign investment in Ukraine and to determine the priority areas and industries for investment and the main foreign investor countries.

Methods. During the research, the following methods were used: an analysis method (to study the dynamics of foreign direct investment in Ukraine), a comparison method (to compare the volume of FDI between different regions, different industries and by receiving countries), a graphic method (to display the dynamics of the normalized rating of the leading countries by the volume of investments in Ukraine) the normalization method (to normalize the indicators of FDI inflows from various countries to Ukraine during 2019-2022) and the rating method (and to build a rating of the regions and industries of Ukraine that received the most FDI during the studied period).

Results. As a result of the conducted research, the rankings of the regions of Ukraine according to the level of receiving FDI were constructed and the changes in these ratings during 2020-2022 were analyzed. The main trends can be defined as: a significant increase in investments in 2021; rather similar location of regions in the 2020 rating. and 2022; the growth of investment attractiveness of the western regions of Ukraine with the beginning of a full-scale invasion.

In the pre-crisis years of 2019 and 2021, the leadership in foreign investments in Ukraine belonged to the countries of the European Union, as well as Cyprus and the Netherlands. In the crisis years of 2020 (the COVID-19 pandemic) and 2022 (the war), Switzerland, England and Luxembourg lead the rating of investor countries. This dynamic is repeated in two crisis periods. In 2022 the volume of FDI from each country fell almost 10 times compared to pre-war 2021. that is, the crisis dynamics of changes in FDI, characteristic of the pandemic 2020, were repeated. In 2019 and 2021, respectively, investments from each of the top investor countries amounted to about 5 billion US dollars. While in the crisis years of 2020 and 2022, these volumes decreased significantly, amounting to about $500 million and $350 million, respectively.

Ratings of Ukrainian industries by the level of receiving FDI were also constructed and changes in these ratings during 2020-2022 were analyzed. In 2021 at the top of the rating were resource-intensive branches of industry, such as mining, processing, metallurgy, etc.) In 2020. and 2022 - financial, trade and telecommunications industries.
Estimation of Stature from Head Circumference in Bangladeshi Santal Female Population: A Correlational Analysis
Authors: Talukder Moumita , Das Ripon Kumar , Basu Jayasree , Afroze Sadia Nure , Banu Laila Anjuman , Khatun Rokeya
Published: August 2024

Context: Craniofacial anthropometry is an important stem of anthropometry in which the dimensions of the head and face are measured. Stature being one of the criteria of personal identification has a definite and proportional biological relationship with each and every part of the human body eg. head, face, trunk and extremities. The Santal community being one of the major tribes of Bangladesh, there are few recorded data in the literature on the craniofacial anthropometry of the Santal female population. The present study was designed to document the standard normal craniofacial measurements and stature of this tribal population and also to determine whether there is any correlation between the measured value of the stature and the physically measured cranial variable. Methods: The study was cross-sectional and descriptive type with some analytical components and was conducted on 100 Santal females. The study was carried out in the Department of Anatomy, Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka, between July 2012 and December 2013. The head circumference was measured by using a flexible measuring tape. The stature was taken by using a hard board and steel tape. Results: The head circumference showed significant positive correlation with stature. No significant difference was found between the “measured” and “estimated” stature for head circumference.
Bangladesh Journal of Anatomy January 2018, Vol. 16, No. 1, pp. 3-8
Variations in the Number of Different Branches of Basilar Artery in Relation to Different Age Group
Authors: Sultana Anjuman Ara , Ara Shamim , Rahman Mushfika , Akhter Farhana , Khan Khushruba Rahman
Published: August 2024

Context: Basilar artery is one of the main arteries that supplies the posterior portion of brain. Anatomy of basilar artery and its branches are very complex and variable. So, detailed morphological knowledge on basilar artery is essential for proper diagnosis and treatment of related neurological disorders. Materials and Methods: A cross-sectional descriptive type of study was carried out in the Department of Anatomy, Dhaka Medical College, Dhaka, from January 2010 to December 2010. 70 postmortem basilar arteries with its branches were collected from unclaimed dead bodies and variations in the number of different branches of basilar artery in relation to different age group were observed. Results: The mean ± SD of number of anterior inferior cerebellar artery (AICA) was found 1.94 ± 0.24 in group A, 1.95 ± 0.31 in group B & 2.00 ± 0.00 in group C. The mean ± SD number of labyrinthine artery (LA) was found 1.67 ± 0.59 in group A, 1.74 ± 0.54 in group B & 1.90 ± 0.32 in group C. The mean ± SD number of pontine artery (PA) was found 5.11 ± 1.08 in group A, 5.21 ± 1.14 in group B & 4.80 ± 1.23 in group C. The mean ± SD number of superior cerebellar artery (SCA) was 2.00±0.00 in group A, 2.10 ± 0.30 in group B, & 2.10 ± 0.32 in group C. The mean ± SD number of posterior cerebral artery (PCA) was 2.00 ± 0.00 in group A, 2.00 ± 0.00 in group B & 2.00 ± 0.00 in group C. Conclusion: Statistically non-significant variation was found in the number of different branches of basilar artery in relation to different age group.
Bangladesh Journal of Anatomy January 2018, Vol. 16, No. 1, pp. 9-12
Effect of Temperature on the Gross Shrinkage of Pig Hearts by Using Silicone (S10) Plastination
Authors: Ahmed Sumaiya , Amin Nahid Farhana , Shamim Khondk er Manzare , Yesmin Zinnat Ara
Published: August 2024

Introduction: Plastination is a modern method of body preservation. The plastinated specimens are dry, odourless, highly durable, non-toxic, non-infectious. As various factors may contribute to the determination of the quality of the plastinates, this research is designed to find out the influence of one factor such as temperature on the plastinates. Objectives: The study was done to compare the percentage of gross shrinkages by volume of pig hearts in different stages of silicone (S10) plastination at cold temperature with those at room temperature. Materials and Methods:. This experimental study was carried out in the Department of Anatomy, Bangabandhu Sheikh Mujib Medical University, Dhaka on twenty-four pig hearts. The percentages of gross shrinkages by volume were calculated for different stages of plastination at cold temperature and at room temperature. Results: The overall mean percentage of gross shrinkage by volume of the pig hearts was significantly greater (38.01±18.78) in cold temperature group than in room temperature group (26.50±12.63). Conclusions: The present study showed the quality of plastinates is better in room temperature than in cold temperature. Thus, room temperature procedure is suitable for our country and also cost-effective which fulfill the ever-increasing demands of user-friendly anatomical tools for the teachers and learners.
Bangladesh Journal of Anatomy January 2018, Vol. 16, No. 1, pp. 21-24
Optimizing PV Module Efficiency: Investigating the impact of Dry and Wet Dust on Solar Panel Output Power
Authors: Ahmed Al Mansur  , Akhter Julekha , Rahman Tuhibur , Islam Md Imamul , Sahin Md
Published: August 2024

Solar photovoltaic modules convert sunlight into electricity through the photoelectric effect. Dust accumulation on PV modules can significantly reduce their output electrical characteristics such as voltage, current, and power. The power reduction is attributed to the decrease in the amount of light reaching the solar cells due to the absorption and scattering of light by the dust layer. The magnitude of the power reduction depends on the amount and type of dust component of the solar panel. In this work, four dust components such as red soil, sand, wood power, and bird drooping are considered to test the PV performance. An indoor experimental setup is developed to test the dust impact on the PV modules using an artificial sun simulator. Experimental shows that the effect of dust accumulation on the voltage and current characteristics of solar panels is complex and depends on various factors. The percentage of degradation of output power is measured using dust under dry and wet conditions. Moreover, different amounts of dust such as 1gm, 3gm, 5gm, 7gm, and 9gm are considered for dry conditions, and 3gm and 5gm are considered for wet conditions. Bird drop causes a maximum degradation of 24.5% in dry conditions and it reduces by 17.2% in wet conditions.
GUB JOURNAL OF SCIENCE AND ENGINEERING, Vol 10(1), 2023 P 68-74
Joint modeling of varying-disease-state longitudinal ordinal data and time-to-event data with application to alzheimer’s disease
Authors: CHANG XIAOLIN , CHEN MING HUI
Published: August 2024

Joint models are routinely used in clinical trials to fit longitudinal and survival data simulta- neously in an integrated fashion. We propose a joint model that incorporates state-specific trajectories for fitting the longitudinal ordinal response and time-to-event data, focusing on its application to Alzheimer’s Disease (AD). The proposed joint model effectively captures the fluctuating cognitive conditions observed before and after the transition between two disease states. By integrating longitudinal data into the survival sub-model through shared trajectories, we can improve the fit of the survival data. A Markov chain Monte Carlo (MCMC) sampling algorithm is developed to carry out Bayesian computation. A variation of the Deviance Information Criterion is developed to assess the fit of each component of the joint model as well as the contribution of the longitudinal data in fitting the survival data. A variation of the concordance (C) index is further derived to assess the discriminatory and predictive performance of the longitudinal sub-model. An in-depth analysis of the real data from the Alzheimer’s Disease Neuroimaging Initiative (ADNI) database is carried out to demonstrate the applicability of the proposed methodology.
Journal of Statistical Research 2024, Vol. 58, No. 1, pp. 49-73.
Modeling informative dropout in longitudinal data: A joint model approach
Authors: DUTTA SRIMANTI , GHOSH PRITHWISH , CHAKRABORTY ARINDOM
Published: August 2024

In medical studies, a disease’s progress is often monitored through indicators that signify the improved or worsened condition of the patient. These are known as longitudinal biomarkers, which are observed along with an event of importance. Together, they form the framework of joint modeling, which has a longitudinal process and an inherently associated time-to-event process. In clinical studies, the change in biomarkers is often monitored in the form of a change in the patient’s plasma level after a drug is administered to the patient. Again, in such studies, patients also withdraw from the trials prematurely or at a later phase, thus giving rise to dropouts. In most cases, this dropout is not random (Missing Not at Random). A joint model has been considered to incorporate this informative dropout in longitudinal response. To demonstrate this approach, a one-compartmental pharmacokinetic (PK) nonlinear mixed-effects model consisting of time-dependent parameters has been used in this work. The dropout mechanism has been introduced using a proportional hazard model. A Bayesian model framework is adopted to study the model’s performance through detailed simulation. A PK study on the drug Divalproex subject to an informative dropout model has been discussed.
Journal of Statistical Research 2024, Vol. 58, No. 1, pp. 97-110.
Predicting pediatric asthma severe outcomes using machine learning methods for EHR data with repeated clinic visits
Authors: ZHOU JIAQIAN LIU, NA BO, XUEPING , FORNO ERICK , DING YING
Published: August 2024

Asthma is the most common multifactorial chronic disease among children. Identifying children at high risk of severe asthma outcomes, such as emergency department (ED) visits and hospitalizations due to asthma exacerbation, is essential in asthma care and clinical management. Existing studies have employed different machine learning methods to predict pediatric asthma occurrence or progression using electronic health records (EHR) data. However, these studies often neglected the correlated nature of EHR data (e.g., repeated clinic visits of the same patients). To address this issue, this research applied and evaluated two types of machine learning-based methods for longitudinal or clustered data, including random forests with mixed effects and generalized neural networks with mixed effects. We applied these methods to the real-world large asthma EHR data obtained from the Children’s Hospital of Pittsburgh in a four-year period expanded from pre to post-COVID-19 pandemic, focusing on predicting the chance of having ED visits due to asthma exacerbation and the length of stay (LOS) when hospitalized. Moreover, we characterized the importance of predictors using the kernel SHAP metric and identified vulnerable patient groups that are more likely to experience asthma exacerbation or have a longer LOS. Our findings provide valuable guidance to improve pediatric asthma care by prioritizing the protection of these vulnerable patients, especially when a disruptive health crisis occurs.
Journal of Statistical Research 2024, Vol. 58, No. 1, pp. 131-149.
Teatro educativo na promoção do uso consciente de tecnologias digitais entre crianças: Experiência e impactos
Authors: Assis Diana Cavalcante Miranda de , Bastos Anne Pereira Lima , Lopes Gisele Vieira Dourado Oliveira , Santos Ísis Emanuelle Almeida , Cruz Thabata Karinne Rocha , Vieira Vanessa Oliveira
Published: August 2024

Este artigo teve como objetivo descrever e compartilhar a experiência de desenvolvimento e aplicação de uma intervenção elaborado por alunos do curso de medicina, que utilizou o teatro como ferramenta para promover o uso equilibrado das tecnologias digitais entre as crianças. A metodologia adotada foi do tipo descritiva narrativa, com enfoque em relato de experiência, visando detalhar e compartilhar observações e práticas vivenciadas durante a pesquisa. A peça teatral abordou as consequências comportamentais e emocionais do uso excessivo das telas, incentivando as crianças a adotarem hábitos mais saudáveis. A participação dos alunos de medicina proporcionou uma experiência prática enriquecedora, desenvolvendo habilidades de comunicação e interação. Este estudo destaca a importância de metodologias ativas de ensino na formação de profissionais de saúde e as contribuições do teatro como ferramenta educativa na promoção de saúde infantil.
A relação entre a hipovitaminose D e as patologias de pé e tornozelo: Uma revisão integrativa
Authors: Ribeiro Isadora Furlan , Nogueira Marina Andrade , Souza Júnior Eli Ávila
Published: August 2024

Objetivos: Revisar a literatura disponível sobre a relação entre a hipovitaminose D e as patologias de pé e tornozelo, com enfoque no sistema osteomuscular e na prevalência de fraturas, a fim de investigar os prejuízos dos baixos níveis da 25-hidroxivitamina D (25(OH)D) para a saúde humana. Metodologia: Trata-se de uma revisão integrativa. Foram selecionados artigos da plataforma PubMed, publicados até 2023, obtidos pela combinação dos descritores “Deficiência de vitamina D”, “Patologias”, "Fraturas”, “Pé” e “Tornozelo”, que respondiam à pergunta norteadora: “Hipovitaminose D e patologias do pé e tornozelo, há relação?”. Resultados: Foram incluídos 22 artigos publicados entre 2009 e 2023 e deles foram extraídos os dados sobre a relação da hipovitaminose D com patologias em pés e tornozelos, sendo os achados agrupados em manifestações nos sistemas osteoarticular, muscular e vascular. As manifestações osteoarticulares foram predominantes, sendo que menores taxas de consolidação de fratura óssea, maior tempo para cicatrização e maior índice de refratura foram as principais relações apresentadas. As manifestações musculares incluíram a redução da força muscular relacionada à hipovitaminose, apesar de 1 dos estudos não ter encontrado essa relação. Os achados vasculares relacionaram a insuficiência de vitamina D com a doença arterial periférica. Foram abordados o raquitismo e a osteomalácia secundários ao tumor mesenquimal fosfatúrico de tecidos moles do pé, condição rara que desencadeia a hipovitaminose D. Conclusão: A hipovitaminose D estabelece relação de causa e de consequência com patologias de pé e tornozelo, sendo os sistemas osteoarticular, muscular e vascular os principais acometidos.
Intervenções da telemedicina na gestão de doenças crônicas: Uma revisão de literatura
Authors: Lino Lucas Arruda , Mendes Luis Miguel Carvalho , Castro Peter Abrante de , Paciello Nicole Borba Oviedo , Costa Ian Marquez de Medeiros , Santos Anderson André Machado dos , Borges Hannah Luíza Flausino , Modesto Rodrigo Pena , Figueiredo Dione Ferreira , Soares Matheus Martins , Muniz Amanda Moreira , Santos Bruna Roberta Pimenta dos
Published: August 2024

Introdução: A telemedicina tem emergido como uma ferramenta crucial na gestão de doenças crônicas, oferecendo soluções inovadoras para melhorar o acesso e a qualidade dos cuidados de saúde. Definida pela Organização Mundial da Saúde (OMS) como a prestação de serviços de saúde a distância utilizando tecnologias de informação e comunicação, a telemedicina tem mostrado eficácia na detecção precoce, prognóstico e monitoramento da progressão de doenças crônicas. Objetivo: Este artigo visa oferecer uma visão abrangente sobre o papel da telemedicina na gestão de doenças crônicas, destacando avanços tecnológicos, desafios enfrentados e implicações clínicas para melhorar os desfechos dos pacientes. A metodologia inclui uma revisão integrativa da literatura, utilizando como base: PubMed, Scopus e Web of Science para identificar estudos relevantes. Os termos de busca incluíram "telemedicina", "doenças crônicas" e "gestão de saúde". Resultados: A utilização da telemedicina demonstra potencial para melhorar o controle glicêmico em diabéticos, reduzir a pressão arterial em hipertensos e manejar exacerbações em pacientes com DPOC. Contudo, a heterogeneidade dos resultados, a validação clínica e a complexidade da interpretação dos dados permanecem desafios significativos. Discussão: A telemedicina oferece vantagens econômicas significativas e melhora o acesso aos cuidados de saúde. No entanto, a falta de infraestrutura tecnológica adequada e questões de privacidade e segurança de dados são barreiras à sua adoção. Conclusão: A telemedicina é uma ferramenta eficaz e econômica para a gestão de doenças crônicas, mas a superação dos desafios tecnológicos e a integração com os sistemas de saúde existentes são cruciais para maximizar seus benefícios.
ASPECTS OF PUBLIC ADMINISTRATION IN THE CONTEXT OF REGIONAL DEVELOPMENT DURING MARTIAL LAW
Authors: KRYSHTANOVYCH MYROSLAV , VORONOV OLEKSANDR , VERYTELNYK SVITLANA , BONDARENKO OLEKSANDR , BUTNYK OLENA
Published: August 2024

The article represents at attempt to outline the most important aspects, challenges, and prospects for public administration in Ukraine in regional context during the wartime. It is shown that poverty and regional disbalances in Ukraine aggravated during two years of war, and the situation in comparative plane is worse than it was in Syria during first two years of war in 2011-2013. Based on Pakistani and Syrian experience and practices, vectors for public administration necessary tasks and available options concerning regional development are suggested.
Women Who Kill: The Image of Postfeminist Success as Motive in the Novels of Ann Cleeves and Val McDermid
Authors: Helwig Lindsay
Published: August 2024

Within the crime genre, women who kill are provided with motivations that echo points of tension in society, killing to gain or retain something necessary for the successful life that they believe they cannot attain using any other method. The recent appearance of the image of postfeminist success, as outlined by Angela McRobbie, as a motive for murder in the novels of Ann Cleeves and Val McDermid is significant as it indicates a critical engagement with the neoliberal expectation that women need to achieve the postfeminist image of success to reach a feminine version of the good life. This article will examine how the image of postfeminist success becomes a motive for murder in Cleeves's and McDermid’s novels, highlighting societal concerns over the impact on women of the expectations of the postfeminist image of success.
Entrepreneurial Logic in Public Administration : A Bull in a China Shop or a Wolf in Sheep’s Clothing?
Authors: Algotson Albin
Published: August 2024

As more and more policy problems are framed and understood as wicked, complex, and unmanageable, public administrators are supposed to act like entrepreneurs in search of creative ways to solve or handle a public problem. As a result, an entrepreneurial logic seems to be established in government administration. This paper aims to describe – but first and foremost to encourage a critical discussion about – the consequences of entrepreneurial logic. The concluding arguments are twofold. First, the entrepreneurial logic could be seen as a “bull in a china shop”, turning established orders upside down. Although the entrepreneurial logic is institutionalized in specific policy areas, it represents a fundamental break with local governments’ still dominant, bureaucratic-rational logic. Second, the entrepreneurial logic is like “a wolf in sheep’s clothing”. The entrepreneurial logic appears attractive to legitimacy-seeking organizations, being associated with creativity, development, and growth. However, it risks undermining fundamental bureaucratic values, as well as the institutional pillars of representative democracy.
Current status and future prospects of pretreatment for tobacco stalk lignocellulose
Authors: Hu Nianwu , Liu Xiongbin , Wei Shuoguo , Yao Jianwu , Wang Wanxia , Liu Ben , Tang Tianming , Jiang Jungang , Wang Lei
Published: August 2024

With the growing demand for sustainable development, tobacco stalks, as a resource-rich and low-cost renewable resource, hold the potential for producing high-value chemicals and materials within a circular economy. Due to the complex and unique structure of tobacco stalk biomass, traditional methods are ineffective in its utilization, making the pretreatment of tobacco stalk lignocellulose a crucial step in obtaining high-value products. This paper reviews recent advancements in various pretreatment technologies for tobacco stalk lignocellulosic biomass, including hydrothermal, steam explosion, acid, alkaline, organic solvent, ionic liquid, and deep eutectic solvent pretreatment. It emphasizes the impact and efficiency of these pretreatment methods on the conversion of tobacco stalk biomass and discusses the advantages and disadvantages of each technique. Finally, the paper forecasts future research directions in the pretreatment of tobacco stalk lignocellulose, providing new insights and methods for enhancing its efficient utilization.
A review of metallic nanoparticles: present issues and prospects focused on the preparation methods, characterization techniques, and their theranostic applications
Authors: Shahalaei Mona , Azad Abul Kalam , Sulaiman Wan Mohd Azizi Wan , Derakhshani Atefeh , Mofakham Elmira Banaee , Mallandrich Mireia , Kumarasamy Vinoth , Subramaniyan Vetriselvan
Published: August 2024

Metallic nanoparticles (MNPs) have garnered significant attention due to their ability to improve the therapeutic index of medications by reducing multidrug resistance and effectively delivering therapeutic agents through active targeting. In addition to drug delivery, MNPs have several medical applications, including in vitro and in vivo diagnostics, and they improve the biocompatibility of materials and nutraceuticals. MNPs have several advantages in drug delivery systems and genetic manipulation, such as improved stability and half-life in circulation, passive or active targeting into the desired target selective tissue, and gene manipulation by delivering genetic materials. The main goal of this review is to provide current information on the present issues and prospects of MNPs in drug and gene delivery systems. The current study focused on MNP preparation methods and their characterization by different techniques, their applications to targeted delivery, non-viral vectors in genetic manipulation, and challenges in clinical trial translation.
The gut microbiota intervenes in glucose tolerance and inflammation by regulating the biosynthesis of taurodeoxycholic acid and carnosine
Authors: Zhen Jianhua , Zhang Yunan , Li Yini , Zhou Yali , Cai Yanan , Huang Guangrui , Xu Anlong
Published: August 2024

Objective

This study aims to investigate the pathogenesis of hyperglycemia and its associated vasculopathy using multiomics analyses in diabetes and impaired glucose tolerance, and validate the mechanism using the cell experiments.

Methods

In this study, we conducted a comprehensive analysis of the metagenomic sequencing data of diabetes to explore the key genera related to its occurrence. Subsequently, participants diagnosed with impaired glucose tolerance (IGT), and healthy subjects, were recruited for fecal and blood sample collection. The dysbiosis of the gut microbiota (GM) and its associated metabolites were analyzed using 16S rDNA sequencing and liquid chromatograph mass spectrometry, respectively. The regulation of gene and protein expression was evaluated through mRNA sequencing and data-independent acquisition technology, respectively. The specific mechanism by which GM dysbiosis affects hyperglycemia and its related vasculopathy was investigated using real-time qPCR, Western blotting, and enzyme-linked immunosorbent assay techniques in HepG2 cells and neutrophils.

Results

Based on the published data, the key alterable genera in the GM associated with diabetes were identified as Blautia, Lactobacillus, Bacteroides, Prevotella, Faecalibacterium, Bifidobacterium, Ruminococcus, Clostridium, and Lachnoclostridium. The related metabolic pathways were identified as cholate degradation and L-histidine biosynthesis. Noteworthy, Blautia and Faecalibacterium displayed similar alterations in patients with IGT compared to those observed in patients with diabetes, and the GM metabolites, tauroursodeoxycholic acid (TUDCA) and carnosine (CARN, a downstream metabolite of histidine and alanine) were both found to be decreased, which in turn regulated the expression of proteins in plasma and mRNAs in neutrophils. Subsequent experiments focused on insulin-like growth factor-binding protein 3 and interleukin-6 due to their impact on blood glucose regulation and associated vascular inflammation. Both proteins were found to be suppressed by TUDCA and CARN in HepG2 cells and neutrophils.

Conclusion

Dysbiosis of the GM occurred throughout the entire progression from IGT to diabetes, characterized by an increase in Blautia and a decrease in Faecalibacterium, leading to reduced levels of TUDCA and CARN, which alleviated their inhibition on the expression of insulin-like growth factor-binding protein 3 and interleukin-6, contributing to the development of hyperglycemia and associated vasculopathy.
Viral infections in etiology of mental disorders: a broad analysis of cytokine profile similarities – a narrative review
Authors: Lorkiewicz Piotr , Waszkiewicz Napoleon
Published: August 2024

The recent pandemic caused by the SARS-CoV-2 virus and the associated mental health complications have renewed scholarly interest in the relationship between viral infections and the development of mental illnesses, a topic that was extensively discussed in the previous century in the context of other viruses, such as influenza. The most probable and analyzable mechanism through which viruses influence the onset of mental illnesses is the inflammation they provoke. Both infections and mental illnesses share a common characteristic: an imbalance in inflammatory factors. In this study, we sought to analyze and compare cytokine profiles in individuals infected with viruses and those suffering from mental illnesses. The objective was to determine whether specific viral diseases can increase the risk of specific mental disorders and whether this risk can be predicted based on the cytokine profile of the viral disease. To this end, we reviewed existing literature, constructed cytokine profiles for various mental and viral diseases, and conducted comparative analyses. The collected data indicate that the risk of developing a specific mental illness cannot be determined solely based on cytokine profiles. However, it was observed that the combination of IL-8 and IL-10 is frequently associated with psychotic symptoms. Therefore, to assess the risk of mental disorders in infected patients, it is imperative to consider the type of virus, the mental complications commonly associated with it, the predominant cytokines to evaluate the risk of psychotic symptoms, and additional patient-specific risk factors.
Innovations in oral hygiene tools: a mini review on recent developments
Authors: Palanisamy Sucharitha
Published: August 2024

Background

This review examines advancements in oral hygiene aids and their impact on gingival and periodontal health. As periodontal diseases are widespread, effective hygiene is vital. Enhancements in traditional tools and innovations have improved oral hygiene status. Clinical evidence confirms these innovations improve gingival and periodontal health, though proper use and patient adherence are crucial.

Methodology

A comprehensive literature search was conducted using MeSH terms like “Gingivitis/prevention & control*”, “Dental Plaque/prevention & control*”, “Dentifrices”, “Electrical Equipment and Supplies*”, “Toothbrushing”, “Equipment Design”, “Anti-Infective Agents/therapeutic use”, “Oils, Volatile/therapeutic use”, “Dental Devices, Home Care”, “Dentifrices*/therapeutic use”, “Vibration”, “Gingivitis*/drug therapy”, “Gingivitis*/prevention & control”, “Gingival Hemorrhage/prevention & control”, “Anti-Inflammatory Agents/pharmacology”, “Chlorhexidine/pharmacology”, “Mouthwashes/pharmacology”, “Anti-Bacterial Agents/pharmacology”, “Mouthwashes/therapeutic use”, “Anti-Infective Agents, Local*/therapeutic use”, “Mouthwashes/chemistry*”, “Plant Extracts/therapeutic use*”, “Sodium Dodecyl Sulfate/therapeutic use*”, “Treatment Outcome”, “Oral Hygiene/methods”, “Toothpastes/therapeutic use*”, “Hyaluronic Acid/therapeutic use”, “Chronic Periodontitis*/therapy”, “Periodontal Attachment Loss/therapy”, “Probiotics*/therapeutic use”, “Oral Hygiene*”, “Periodontal Index” and so on. This search utilized PubMed and Google Scholar, restricted to English-language publications from 2018 to 2024. The screening process involved reviewing titles, abstracts, and keywords, focusing on randomized clinical trials only. Inclusion criteria focused on novel innovations in conventional oral hygiene methodologies. A total of 86 randomized clinical trial articles met the inclusion criteria.

Results

Recent innovations in traditional oral hygiene tools have markedly enhanced oral hygiene levels and patient compliance. These newer innovations demonstrate substantial efficacy in plaque control and gingival health. Clinical outcomes underscore their pivotal role in improving oral hygiene standards, promoting reduced gingivitis and enhanced patient adherence to oral care regimens.

Conclusion

Advanced oral hygiene aids significantly improve gingival and periodontal health. However, patient adherence and correct usage are crucial for their optimal performance. Incorporating advanced oral hygiene aids into daily practices is essential for achieving optimal periodontal health, and continuous education is necessary to ensure their effective use.
An intervention model for developing self-directed learning skills in NEET-youth: a literature review
Authors: Kõiv Kerli , Saks Katrin , Gencel Ilke Evin , Güven Kaan M. , Azzopardi Abraham , Todoroska Valentina , Petkovska Elena
Published: August 2024

In response to the growing need for self-directed learning (SDL) skills in a rapidly changing world, research was conducted to map interventions that support SDL skills, aiming to find a model for supporting SDL skills in NEET-youth. SDL competencies support continuous personal development and coping with change. There is a significant number of young people in society who do not participate in working life, education, or training (NEET-youth) and are characterized by a low level of education. Little has been done to support SDL skills interventions for them; however, bringing young people back to the education path is a crucial issue. This raises important questions about which supportive approach and tools are most beneficial for developing SDL skills in NEET-youth, and how best to implement them. This literature review is based on the analysis of 25 articles. The results of the study showed that SDL interventions have not been used for NEET-youth, and therefore, the new model was created. In the case of NEET-youth the SDL intervention should be seen as a non-formal learning process that combines various activities that enable self-reflection and real-life experiences for acquiring new positive learning experiences.
An adaptive power control method for soft open points based on virtual impedance
Authors: Li Yan , Li Yang , Zhao Xingjian , Gao Feng , Xu Tao
Published: August 2024

The fluctuations in power output from distributed power sources are rapid and dramatic, causing voltage fluctuations in the distribution network that threaten the safety of electricity consumption. Soft open points (SOPs) can replace traditional contact switches and are expected to suppress voltage fluctuations. However, traditional power regulation methods based on the reference values are unable to address rapid and large voltage fluctuations. Therefore, this paper proposes an adaptive power control method for SOPs based on virtual impedance. The SOP is modeled as a series link of adjustable impedance and a voltage source. Then, the voltage difference component is used to calculate the reference for the DQ domain to regulate the power flow in real time automatically. By doing so, the proposed method can smooth the voltage fluctuations in the distribution network. Additionally, the virtual impedance is also optimized to minimize the power loss. Finally, the method is validated through simulation and experiments, demonstrating that this method can automatically regulate power and significantly reduce voltage fluctuations.