检索结果-南通市图书馆

Investigation of Fracture Strength of Current Post Materials (Peek, Fiber, Cast Metal) in Different Ferrule Conditions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Stomatology 2024年第3期14卷 153-172页

作者： ba.ak Topdaği Funda ba.indir Department of Prosthetic Dentistry Atatürk University Erzurum Türkiye

Aim: The fracture resistance of the post materials used nowadays significantly impacts the fracture type of the post material. The current study aimed to examine the impact of the fracture resistance of PEEK posts, whose use as a post material has not yet become widespread, on the fracture pattern that will occur. Materials and Methods: Sixty-six extracted upper central incisor human teeth were used in the study. Six groups of posts were produced from metal, fiber, and PEEK materials (n = 11). Afterward, the fracture resistance test was applied to the samples. Samples were classified according to fracture type as repairable or irreparable. The ANOVA and test were used in statistical analysis. Post-hoc tests were carried out using Tukey’s and Tamhane’s T2 tests. On the other hand, Pearson’s chi-square test and the Fisher-Freeman-Halton test were conducted for comparisons between categorical variables. The statistical significance level was accepted as p Results: According to the fracture resistance test results, the groups where metal personal posts were used displayed higher fracture resistance in comparison with all other groups. According to the results of the optical microscope examination, the incidence of repairable fractures was significantly higher in the PEEK post group with ferrule preparation (p 0.05). Conclusion: In the absence of the ferrule effect, fractures are catastrophic, regardless of the material used. The use of PEEK as a post material contributes to keeping fractures at a repairable level.

关键词： Component Formatting Style Styling Insert

Influence of donor age on liver transplantation outcomes: A multivariate analysis and comparative study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Surgery 2024年第2期16卷 331-344页

作者： Miran Bezjak Ivan Stresec Branislav Kocman Stipislav Jadrijević Tajana Filipec Kanizaj Miro Antonijević Bojana Dalbelo ba.ić Danko Mikulić Department of Surgery University Hospital MerkurZagreb 10000Croatia Department of Electronics MicroelectronicsComputer and Intelligent SystemsFaculty of Electrical Engineering and ComputingZagreb 10000Croatia Department of Gastroenterology University Hospital MerkurZagreb 10000Croatia Development of Software Nanobit Ltd.Zagreb 10000Croatia

ba.KGROUND The growing disparity between the rising demand for liver transplantation(LT)and the limited availability of donor organs has prompted a greater reliance on older liver ***,utilizing livers from elderly donors has been associated with outcomes inferior to those achieved with grafts from younger *** accounting for additional risk factors,we hypothesize that the utili-zation of older liver grafts has a relatively minor impact on both patient survival and graft *** To evaluate the impact of donor age on LT outcomes using multivariate analysis and comparing young and elderly donor *** In the period from April 2013 to December 2018,656 adult liver transplants were performed at the University Hospital *** multivariate Cox propor-tional hazards models were developed to independently assess the significance of donor *** age was treated as a continuous *** approach involved univariate and multivariate analysis,including variable selection and assessment of interactions and ***,to exemplify the similarity of using young and old donor liver grafts,the group of 87 recipients of elderly donor liver grafts(≥75 years)was compared to a group of 124 recipients of young liver grafts(≤45 years)from the *** rates of the two groups were estimated using the Kaplan-Meier method and the log-rank test was used to test the differences between *** Using multivariate Cox analysis,we found no statistical significance in the role of donor age within the constructed *** when retained during the entire model development,the donor age's impact on survival remained insignificant and transformations and interactions yielded no substantial effects on *** insigni-ficance and low coefficient values suggest that donor age does not impact patient survival in our ***,there was no statistical evidence that the five developed models did not adhe

关键词： Liver transplantation Elderly donors Survival analysis Postoperative complications Cox proportional hazard models

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

舞蹈高等教育面向未来发展的八个引擎

北京舞蹈学院学报 2024年第1期 1-7页

作者：巴图北京舞蹈学院北京100081

在北京舞蹈学院建校70周年之际,文章提出舞蹈高等教育面向未来发展的八个引擎,即先进舞蹈文化之光的映照、优质舞蹈教育供给的扩容、贤哲云集的变量效应、自觉的舞蹈学术驱动、学院风格的艺术创作、更有效能的舞蹈教育国际化、舞蹈教育... 详细信息

在北京舞蹈学院建校70周年之际,文章提出舞蹈高等教育面向未来发展的八个引擎,即先进舞蹈文化之光的映照、优质舞蹈教育供给的扩容、贤哲云集的变量效应、自觉的舞蹈学术驱动、学院风格的艺术创作、更有效能的舞蹈教育国际化、舞蹈教育的数字化赋能、舞蹈课堂中的革命风暴。

关键词：舞蹈高等教育未来发展引擎

维普期刊数据库

新文科建设背景下中国教育人类学学科建设研究

在线全文

学校读者我要写书评

暂无评论

西北民族研究 2024年第1期 75-88页

作者：巴战龙北京师范大学社会学院北京100875

中国教育人类学在百余年发展历程中取得长足进步和显著成就,但也面临如何提高研究质量和提升创新能力的尖锐挑战。当前中国教育人类学的繁荣发展,需要紧紧抓住新文科建设提供的难得契机,在厘清和重构学科定位和愿景的基础上,构建以学会... 详细信息

中国教育人类学在百余年发展历程中取得长足进步和显著成就,但也面临如何提高研究质量和提升创新能力的尖锐挑战。当前中国教育人类学的繁荣发展,需要紧紧抓住新文科建设提供的难得契机,在厘清和重构学科定位和愿景的基础上,构建以学会组织为核心的学科创新生态系统。为实现“世界水平、中国特色”的学科建设目标和任务,中国教育人类学界需要齐心协力,从开发和健全学会组织功能、激励和加强高等学校教学、构建和密织学术合作网络、加强和提升学术创新能力、普及和传播学科视角方法等五个方面着手构建学科创新生态系统。通过不懈努力将教育人类学打造成文科教育中国范式的典型案例和示范学科,真正开创出国际学界公认和国内学界自豪的“教育人类学的中国时代”。

关键词：创新生态系统新文科建设学科建设教育人类学

维普期刊数据库

现代性与多样性的关系--教育人类学的根本研究论题刍议

在线全文

学校读者我要写书评

暂无评论

西南民族大学学报（人文社会科学版） 2024年第5期45卷 16-26页

作者：巴战龙北京师范大学社会学院北京100875

作为学科界说的新范式,“新教育人类学”建立在两个基本假设--教育人类学既是一门社会科学,又是教育诸学科中最为基础的学科--之上,主张教育人类学的根本研究论题是现代性与多样性的关系问题。尽管学界关于“何谓现代性”至今仍是聚讼... 详细信息

作为学科界说的新范式,“新教育人类学”建立在两个基本假设--教育人类学既是一门社会科学,又是教育诸学科中最为基础的学科--之上,主张教育人类学的根本研究论题是现代性与多样性的关系问题。尽管学界关于“何谓现代性”至今仍是聚讼纷纷、莫衷一是,但在反思性继承社会科学已有经验和成果的基础上,教育人类学至少可以从同一性与多样性和不平等与多样性两个主题出发对现代性与多样性的关系问题展开探索和论述,进而转换研究视角和理论观念,努力做出新时代“标志性研究成果”。

关键词：现代性多样性理论构建新教育人类学

维普期刊数据库

Comparative studies between humans and golden Syrian hamsters via thromboelastography

在线全文

学校读者我要写书评

暂无评论

Animal Models and Experimental Medicine 2024年第04期 570-577页

作者： Ze Yang Lili Xie Jingjing ba.Simin Zan Letong Zhang Xinyi Zhang Yang Yu School of Laboratory Animal & Shandong Laboratory Animal Center Shandong First Medical University & Shandong Academy of Medical Sciences The Second Affiliated Hospital of Shandong First Medical University

ba.kground : Thromboelastography(TEG) is a widely utilized clinical testing method for real-time monitoring of platelet function and the thrombosis process. Lipid metabolism disorders are crucial risk factors for thrombosis. The lipid metabolism characteristics of hamsters resemble those of humans more closely than mice and rats, and their relatively large blood volume makes them suitable for studying the mechanisms of thrombosis related to plasma lipid mechanisms. Whole blood samples from golden Syrian hamsters and healthy humans were obtained following standard clinical procedures. TEG was employed to evaluate coagulation factor function, fibrinogen(Fib)function, platelet function, and the fibrinolytic *** : The whole blood from hamster or healthy human was isolated following the clinical procedure, and TEG was employed to evaluate the coagulation factor function, Fib function, platelet function, and fibrinolytic system. Coagulation analysis used ACLTOP750 automatic coagulation analysis pipeline. Blood routine testing used XN-2000 automatic blood *** : TEG parameters revealed that hamsters exhibited stronger coagulation factor function than humans(reaction time [R], p = 0.0117), with stronger Fib function(alpha angle, p < 0.0001; K-time [K], p < 0.0001). Platelet function did not differ significantly(maximum amplitude [MA], p = 0.077). Hamsters displayed higher coagulation status than humans(coagulation index [CI], p = 0.0023), and the rate of blood clot dissolution in hamsters differed from that in humans(percentage lysis 30 min after MA, p = 0.02). Coagulation analysis parameters indicated that prothrombin time(PT)and activated partial thromboplastin time(APTT) were faster in hamsters than in humans(PT, p = 0.0014; APTT, p = 0.03), whereas the Fib content was significantly lower in hamsters than in humans( p < 0.0001). No significant difference was observed in thrombin time( p = 0.1949).Conclusions : In summary, TEG could be used to evalu

关键词：

Spatial Morphology Evolution Characteristics Analysis of the Resident Population Distribution in Henan, China

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Geoscience and Environment Protection 2024年第3期12卷 163-180页

作者： Kaiguang Zhang Hongling Meng Mingting ba.Danhuan Wen School of Geography and Tourism Zhengzhou Normal University Zhengzhou China

The population spatial distribution pattern and its evolving pattern play an important role in regional allocation of social resources and production factors, formulation of regional development plans, construction of a better life society, and promotion of regional economic development. ba.ed on the resident population statistics data of Henan province from 2006 to 2021, with county as the ba.ic study unit, the paper studies the spatial morphology characteristics and its evolution patterns of resident population distribution, by using spatial analysis methods such as population distribution center, standard deviation ellipse, and spatial auto correlation analysis. The results show that: the resident population spatial distribution shows unba.anced state, the population agglomeration areas mainly distribute in the northeast part and north part, where the resident population growth rate is significantly higher than other regions, over time, this trend is gradually becoming significant. The resident population distribution has a trend of centripetal concentration, with the degree and trend of centripetal gradually strengthening. The resident population distribution has obvious directional characteristics, but the significance is not high, the weighted resident population average center is approximately located at (4.13740˚N, 113.8935˚E), and the azimuth of the distribution axis is approximately 11.19˚. The population distribution has obvious agglomeration characteristics, with the built-up areas of Zhengzhou and Luoyang as their centers, where have a significant siphon effect on the surrounding population. The southern and southwestern regions in the province form a relatively stable belt area of Low-Low agglomeration areas.

关键词： Resident Population Spatial Distribution Spatial Morphology Temporal and Spatial Evolution Center Migration Standard Deviation Ellipse Spatial Autocorrelation

根茎克隆植物芦苇应对风沙活动过程的生长和生殖的权衡关系

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Plant Ecology 2024年第1期17卷 68-77页

作者： Chaoqun ba.Shanshan Zhai Jianqiang Qian Bo Liu Jinlei Zhu Zhimin Liu Institute of Applied Ecology Chinese Academy of SciencesShenyang 110016China University of Chinese Academy of Sciences Beijing 100049China College of Forestry Henan Agricultural UniversityZhengzhou 450002China College of Life Science Qufu Normal UniversityQufu 273165China Institute of Ecological Conservation and Restoration Chinese Academy of ForestryBeijing 100093China

生长和繁殖之间的权衡是克隆植物适应性策略的重要组成部分。根茎型沙生植物通过权衡策略应对风沙过程(埋沙和风蚀)对它们在流动沙丘上的定居尤为重要。尽管根茎型物种对风沙过程的响应已经有了部分研究,但这些克隆物种如何通过生长和... 详细信息

生长和繁殖之间的权衡是克隆植物适应性策略的重要组成部分。根茎型沙生植物通过权衡策略应对风沙过程(埋沙和风蚀)对它们在流动沙丘上的定居尤为重要。尽管根茎型物种对风沙过程的响应已经有了部分研究,但这些克隆物种如何通过生长和繁殖中的潜在权衡关系来应对风沙过程仍不清楚。在本研究中,我们采用了野外调查和生物量建模的手段,评估了芦苇(Phragmites communis)在沙埋和风蚀条件下,营养生长和生殖生长以及分株数量和大小之间的权衡关系。研究结果表明,沙埋促进了种子生物量和生殖努力(RE)的增加;风蚀减少了RE,但对种子生物量没有显著影响。沙埋增加了分株的生物量,而风蚀增加了分株种群密度并加速了分株的成熟。这些研究表明,根茎型沙地植物通过调整其生长策略来应对风沙过程,即在沙埋条件下,增加生殖生长和分株大小,而在风蚀条件下,增加营养生长和分株数量。

关键词：适应策略沙埋风蚀芦苇(Phragmites communis) 有性生长无性生长根茎

Aviation Safety and Data Mining in Marketing Dimension

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Aerospace Science and Technology 2024年第3期9卷 117-127页

作者： Sevgi Adigüzel Murat ba.al Emel Saraç Transportation Services Department Idr University Idr Trkiye Vocational School Istanbul Gelisim University Istanbul Trkiye Department of Business Administration Institute of Social Sciences Ostim Technical University Ankara Trkiye

The aviation industry is a sector that is developing, changing and growing every day in terms of technological and legal framework. There are generally three factors that enable airlines to hold on to the market. These factors are safety, service quality and price. Airline companies can analyze the customers in the market with a focus on price and quality and develop a business model according to their expectations. For example, business class and economy class passenger expectations are different from each other, so the service and price to be offered to them will be different. However, all customers have one common expectation and that is safety. No matter how high quality the service is or how cheap the price is, no one wants to fly with an airline or plane that is not safe. From an airline company’s point of view, an accident or breakdown of one of the company’s aircraft can cause irreparable image loss and financial damage. If we look at past examples, we see that there are many airline companies or maintenance organizations that could not recover after an accident and went ba.krupt. Safety is an indispensable factor. Therefore, there is a unit in the sector called the safety management system (SMS), which collects data by taking a proactive and reactive approach. The way and purpose of the safety management system is to take a proactive approach to recognize and prevent unsafe situations before they cause accidents or breakdowns, or to take a reactive approach to find the causes of accidents and breakdowns that have occurred as a result of certain factors and to take the necessary measures to prevent the same situations from happening again in the sector. The field of data mining, which is necessary to predict the future behavior of customers in the field of marketing, is an area that marketing also values. In this study, data mining studies to ensure safety in the aviation industry and the security of customer information in marketing will be emphasized, firs

关键词： Data Mining Aviation Customer Safety Marketing