发布求助
文献互助 智能选刊 最新文献

European Journal of Engineering Research and Science最新文献

筛选
英文 中文
Effects of Two Pre-Treatment Methods on Water Absorption Property of Polyester-Fibre Composites 两种预处理方法对聚酯-纤维复合材料吸水性能的影响
European Journal of Engineering Research and Science Pub Date : 2020-12-23 DOI: 10.24018/ejers.2020.5.12.2266
P. N. Obianuko, T. U. Onuegbu
{"title":"Effects of Two Pre-Treatment Methods on Water Absorption Property of Polyester-Fibre Composites","authors":"P. N. Obianuko, T. U. Onuegbu","doi":"10.24018/ejers.2020.5.12.2266","DOIUrl":"https://doi.org/10.24018/ejers.2020.5.12.2266","url":null,"abstract":"The use of plant fibres as reinforcement in composite materials is finding increasing interest in the automotive and building industry, and the properties of plant fibre composites have been addressed in numerous research studies. The replacement of synthetic fibres with natural fibres in composites is based on their renewable and environmentally friendly nature. \u0000The aim of this work is to investigate the effects of two chemical pre-treatment methods on the water absorption property of polyester-fibre composites. Fully grown kenaf (hibiscus cannabalis) bast fibres were manually retted from the stalk, washed, and cut into short fibre lengths of about 10 cm. One portion of the fibres was pre-treated with 5% pbw NaOH solution before immersing it in glacial acetic acid and then in acetic anhydride. The second portion was pre-treated with 5%pbw of NaOH and 0.125% of KMnO4 in acetone. The third portion of fibres was untreated to serve as control. The ground fibre was incorporated into ortho unsaturated polyester and cast with Teflon square shaped mould. The cured samples were weighed and immersed in water at room temperature until no further gain in weight was observed. The SEM of the fibres and the composites was taken. The results showed that the acetylation pre-treatment method reduced the water absorption property of the composites by a minimum of 46.0% across all fibre volume fractions while the permanganate pre-treatment reduced it by at least 25.5%. Chemical pre-treatment of fibres can therefore","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86301641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An Experimental Investigation of Mechanical Properties of Bonded Concrete 粘结混凝土力学性能的试验研究
European Journal of Engineering Research and Science Pub Date : 2020-12-23 DOI: 10.24018/ejers.2020.5.12.2290
F. Tehrani
{"title":"An Experimental Investigation of Mechanical Properties of Bonded Concrete","authors":"F. Tehrani","doi":"10.24018/ejers.2020.5.12.2290","DOIUrl":"https://doi.org/10.24018/ejers.2020.5.12.2290","url":null,"abstract":"This paper presents an experimental study to measure mechanical properties of bonded concrete specimens. The bond between freshly mixed and hardened concrete has been a concern in repair and retrofit projects as well as staged construction of concrete members. This concern has roots in the time-dependent behavior of concrete, beginning with early-age concrete and continuing with long-term performance and durability of concrete. Moreover, environmental conditions generally complicate the behavior of concrete and resulted deformations such as shrinkage and creep. Application of chemical adhesives and epoxies is a common technique to enhance the bond at the interface of old and new concrete elements. The presented methodology includes preparation of bonded specimens with application of grout and adhesive agents. Mechanical strengths of specimens have been reported based on compressive, tensile, flexural, and shear testing. Results indicate that bonding agents are more effective in tensile and shear behavior of bonded samples.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"203 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89623214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Examining the use of STEAM Education in Preschool Education 探讨STEAM教育在学前教育中的应用
European Journal of Engineering Research and Science Pub Date : 2020-12-19 DOI: 10.24018/ejers.2020.0.cie.2309
C. Spyropoulou, Manolis Wallace, C. Vassilakis, V. Poulopoulos
{"title":"Examining the use of STEAM Education in Preschool Education","authors":"C. Spyropoulou, Manolis Wallace, C. Vassilakis, V. Poulopoulos","doi":"10.24018/ejers.2020.0.cie.2309","DOIUrl":"https://doi.org/10.24018/ejers.2020.0.cie.2309","url":null,"abstract":"STEAM (Science, Technology, Engineering, Arts and Mathematics) initiatives are of current interest for both in-school and out-of-school contexts in North America. This is a new concept which is shifting educational paradigms towards art integration in STEM subjects. This article focuses on the need for STEAM education at the early childhood level and investigates the teaching and educational models of STEAM education in the kindergarten and in the first grades of primary school and how pre-school and primary school teachers see these models in the Greek context but also what students eventually learn from these models. The purpose of this chapter is to better understand the educational programs of STEAM education, which are offered by non-profit organizations and both public and private schools. Preschool children have a natural disposition toward science with their sense of curiosity and creativity. More research needs to be done in the area of STEAM implementation in the K-8 classrooms to incorporate engineering education.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74661401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Reflections on Online Delivered Lessons, During COVID-19 Induced Restrictions, for Students of Informatics in a Vocational Lyceum of Greece 新冠肺炎疫情期间，希腊一所职业学院信息学专业学生在线授课的思考
European Journal of Engineering Research and Science Pub Date : 2020-12-19 DOI: 10.24018/ejers.2020.0.cie.2304
Panagiotis S. Makrygiannis
{"title":"Reflections on Online Delivered Lessons, During COVID-19 Induced Restrictions, for Students of Informatics in a Vocational Lyceum of Greece","authors":"Panagiotis S. Makrygiannis","doi":"10.24018/ejers.2020.0.cie.2304","DOIUrl":"https://doi.org/10.24018/ejers.2020.0.cie.2304","url":null,"abstract":"During the pandemic outbreak of COVID-19, coinciding with school year 2019-2020, house confinement measures were taken throughout Greece. Conventional face-to-face schooling presented a threat to public health. As a result the Greek Ministry of Education proceeded to suspend school operations for a while and sponsor online lessons of various shapes and forms as a temporary measure soon after. The lessons, hastily designed to address extraordinary conditions and delivered in an ad hoc manner utilizing teachers’ personal experiences and preferences to fill a gap created by house confinement, created pressures on existing infrastructures on one hand, and a corpus of diverse experiences, contradicting evidence and on occasion reports on the other. A discussion on that corpus was inevitable and took part originally among teachers of the same school either unofficially or during sessions of the teachers associations of each school. The discussion should and will expand beyond that especially in reference to cases that constitute good practices or where data were collected. To this purpose, this paper presents the case of two theoretical lessons taught at senior high-school students of the Information Applications’ Technician specialty in a Vocational Lyceum. The lessons operated surprisingly well, in comparison to similar lessons, concerning student attendance, student engagement level and continuance. Some data were collected with a questionnaire and their processing later informed discussions during reflection plenary sessions of the online class. An attempt is made to explain the divergence from the general case and reflection on results is used to draw conclusions that may benefit further attempts.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91554962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Seasonality and Software Vulnerabilities in Major Database Management Systems 主要数据库管理系统的季节性和软件漏洞
European Journal of Engineering Research and Science Pub Date : 2020-12-19 DOI: 10.24018/ejers.2020.5.12.2273
Hyunchul Joh
{"title":"Seasonality and Software Vulnerabilities in Major Database Management Systems","authors":"Hyunchul Joh","doi":"10.24018/ejers.2020.5.12.2273","DOIUrl":"https://doi.org/10.24018/ejers.2020.5.12.2273","url":null,"abstract":"Popularity and marketshare are very important index for software users and vendors since more popular systems tend to engage better user experience and environments. periodical fluctuations in the popularity and marketshare could be vital factors when we estimate the potential risk analysis in target systems. Meanwhile, software vulnerabilities, in major relational database management systems, are detected every now and then. Today, all most every organizations depend on those database systems for store and retrieve their any kinds of informations for the reasons of security, effectiveness, etc. They have to manage and evaluate the level of risks created by the software vulnerabilities so that they could avoid potential losses before the security defects damage their reputations. Here, we examine the seasonal fluctuations with respect to the view of software security risks in the four major database systems, namely MySQL, MariaDB, Oracle Database and Microsoft SQL Server.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75393494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Visual Depiction of an Educational Robotics Framework Aimed to Foster the Development of Collaboration Skills 旨在培养协作技能发展的教育机器人框架的视觉描述
European Journal of Engineering Research and Science Pub Date : 2020-12-19 DOI: 10.24018/ejers.2020.0.cie.2312
Emmanouil A. Demetroulis, N. Platis, Manolis Wallace, Angeliki Antoniou, V. Poulopoulos
{"title":"A Visual Depiction of an Educational Robotics Framework Aimed to Foster the Development of Collaboration Skills","authors":"Emmanouil A. Demetroulis, N. Platis, Manolis Wallace, Angeliki Antoniou, V. Poulopoulos","doi":"10.24018/ejers.2020.0.cie.2312","DOIUrl":"https://doi.org/10.24018/ejers.2020.0.cie.2312","url":null,"abstract":"There is a constantly growing research interest for Educational Robotics and its effects to the development of student skills. Many researchers conclude and state that E.R develops and increases the collaboration skills of students, without presenting a specific strategy or a methodology that supports the whole process. In addition, the reports are not supported by measurable results or observations of elements that comprise the collaboration skills. This research focuses at the creation of the appropriate conditions, strategy and methodology in order for collaboration skills to find solid foundations for development. It is important to be stated that collaboration is not seen as the means to produce learning outcomes, but collaboration and collaboration skills are perceived to be the outcome of this approach. The aim of this article is to provide a visual depiction of our proposed approach.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"71 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87841715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Using Learning Theories for the Creation of a Distance Digital Course in Mathematics for Higher Education 运用学习理论创建高等数学远程数字课程
European Journal of Engineering Research and Science Pub Date : 2020-12-19 DOI: 10.24018/ejers.2020.0.cie.2311
I. Velentzas, Spyros Doukakis
{"title":"Using Learning Theories for the Creation of a Distance Digital Course in Mathematics for Higher Education","authors":"I. Velentzas, Spyros Doukakis","doi":"10.24018/ejers.2020.0.cie.2311","DOIUrl":"https://doi.org/10.24018/ejers.2020.0.cie.2311","url":null,"abstract":"This article presents the results of research on the effectiveness of distance education in Mathematics for higher education students. A digital course in Differential Calculus was created, which was evaluated by the students who participated in it. The aim of the quantitative research carried out was to identify the conditions needed for the implementation of a digital distance education model. The design includes the integration of activities based on learning theories at targeted points of the distance learning. From the results, it appears that the students achieved the learning outcomes that were identified. Moreover, the integration of the relevant activities had a positive impact on the students, who a) positively evaluated the program they attended and b) stated that their knowledge was enhanced at the issues negotiated on the course.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88728926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Post-pandemic Pedagogy: Distance Education in Greece During COVID-19 Pandemic Through the Eyes of the Teachers 大流行后教学法:教师眼中的希腊COVID-19大流行期间的远程教育
European Journal of Engineering Research and Science Pub Date : 2020-12-19 DOI: 10.24018/ejers.2020.0.cie.2305
Stefanos Nikiforos, Spyros Tzanavaris, Katia Lida Kermanidis
{"title":"Post-pandemic Pedagogy: Distance Education in Greece During COVID-19 Pandemic Through the Eyes of the Teachers","authors":"Stefanos Nikiforos, Spyros Tzanavaris, Katia Lida Kermanidis","doi":"10.24018/ejers.2020.0.cie.2305","DOIUrl":"https://doi.org/10.24018/ejers.2020.0.cie.2305","url":null,"abstract":"Distance education had already appeared since 1970. During the first implementation period it mainly concerned adults and education at university level. In the recent years, through the internet development, distance education has acquired a new hypostasis, as innovative applications have facilitated its implementation in multiple contexts. Despite this, education remained mainly on a physical level (face to face interaction), while distance education was rather complementary (hybrid or blended learning). However, during the COVID-19 pandemic, the first pandemic in the digital era, an urgent need that led to a universal and “violent” transition to distance education arose, often without assuring the necessary preconditions. This research aims to capture the experience of teachers in Greece during this transition.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"237 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83487586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Emotional Intelligence and Educational Robotics: The Development of the EI-EDUROBOT 情商与教育机器人:EI-EDUROBOT的发展
European Journal of Engineering Research and Science Pub Date : 2020-12-19 DOI: 10.24018/ejers.2020.0.cie.2307
Dimitrios Ziouzios, Michalis Ioannou, Tsolopani Ioanna, T. Bratitsis, M. Dasygenis
{"title":"Emotional Intelligence and Educational Robotics: The Development of the EI-EDUROBOT","authors":"Dimitrios Ziouzios, Michalis Ioannou, Tsolopani Ioanna, T. Bratitsis, M. Dasygenis","doi":"10.24018/ejers.2020.0.cie.2307","DOIUrl":"https://doi.org/10.24018/ejers.2020.0.cie.2307","url":null,"abstract":"In recent years, ICT has become a fundamental element of almost all aspects of formal and non-formal education. Educational Robotics (ER) as an ICT subfield has triggered many studies of ER educational utilization. Furthermore, there is also a growing interest in studies in Special Education with ER and ICT in general, usually focusing on emotional intelligence, especially in social skills’ development and empathy training. This paper presents the development of a Robotic Platform, the EI-EDUROBOT, which aims to cultivate empathy and social skills of typically developed children, aged 4 to 9 years, but also children with Autism Spectrum Disorders (ASD), among these two social groups.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79669345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Development of a Methodology for the Design and Management of Academic Strategy – A Holist Approach using Multi-criteria Analysis Techniques 学术策略设计和管理方法的发展-使用多标准分析技术的整体方法
European Journal of Engineering Research and Science Pub Date : 2020-12-19 DOI: 10.24018/ejers.2020.0.cie.2303
Manolis Chalaris, S. Gritzalis, C. Sgouropoulou, M. Maragoudakis
{"title":"Development of a Methodology for the Design and Management of Academic Strategy – A Holist Approach using Multi-criteria Analysis Techniques","authors":"Manolis Chalaris, S. Gritzalis, C. Sgouropoulou, M. Maragoudakis","doi":"10.24018/ejers.2020.0.cie.2303","DOIUrl":"https://doi.org/10.24018/ejers.2020.0.cie.2303","url":null,"abstract":"Aim of the current research paper is to propose an innovative solution for the problematic of the holistic management of an academic strategy. The systematic bibliographic surveys conducted showed that the combination of BSC method together with a multitude of MCDA techniques constitute the most important tools for this issue. Thus, we propose a holistic process-based methodology for the management of an academic strategy which spans from its design and oversight, to interpretation issues of the academic classification of departments of Universities or between Universities where assembly bodies (Quality Assurance Unit, HAHE) are active. We claim that our methodology is of particular importance and that its use will highlight the operational quality of well organised Universities.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79372833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信