scholarly journals Bond Between Steel and Self-Compacting Concrete in Composite Tube Columns

2017 ◽  
Vol 63 (2) ◽  
pp. 131-143
Author(s):  
M. Szadkowska ◽  
E. Szmigiera
Keyword(s):  
Vertical Shear ◽  
Self Compacting Concrete ◽  
Composite Tubes ◽  
Research Results ◽  
Composite Tube ◽  
Geometric Factors ◽  
The Impact

Abstract This paper presents research results of composite tubes filled with self-compacting concrete. The impact of the selected materials and geometric factors on resistance to the vertical shear was evaluated in this study. The resistance of the tested members was compared with recommendations given in Eurocode PN-EN 1994-1-1. From the results obtained in the tests it can be deduced that more parameters should be taken into consideration when determining resistance to the vertical shear in the interface between steel and concrete than PN-EN 1994- 1-1 recommends.

Numerical and experimental study on effect of braiding angle on low-velocity transverse punch response of braided composite tube

2019 ◽  
Vol 29 (4) ◽  
pp. 667-686 ◽  
Author(s):  
Yeli Jin ◽  
Zhenyu Wu ◽  
Zhongxiang Pan ◽  
Laihu Peng ◽  
Xudong Hu
Keyword(s):  
Impact Loading ◽  
Failure Modes ◽  
Transverse Impact ◽  
Low Velocity ◽  
Composite Tubes ◽  
Braided Composite ◽  
Composite Tube ◽  
Damage Initiation ◽  
Braiding Angle ◽  
The Impact

In this study, the performance of braided composite tubes under low-velocity transverse impact loading at mid-span was investigated using both numerical and experimental methods. Three types of braided composite tubes with different braiding angles (30°, 45°, and 60°) were manufactured. The transverse punch behavior of the tubes was examined on a low-velocity imspact test bench. A meso-level finite element model of the composite tube was also established for identifying the damage initiation and development. The numerical results showed a good correlation with the experimental data. The mechanical response including force–time histories, force–displacement histories, and fracture morphologies was compared between three types of composite tubes for analyzing the influence of braiding angle on the impact response and failure mode. Although suffering from the low bending stiffness depends on fiber volume fraction at initial impact stage, the braided tube with 30° angle engaged more portion to resist impact loading in subsequent process and thus presented higher peak loading than the one with large angle. In addition, there are distinct different failure modes between composite tubes with various braiding angles. Shear yarn breakage underneath the punch was prone to occur in 30° sample because the braiding yarn was closer to the axial direction of tube. In contrast, the resin was deboned severely from the braiding yarn and then the braiding yarn exhibits plastic deformation in 60° sample due to the stress concentration caused by the large braiding angle.

The impact of reflective writing paper on non-English major learners’ autonomy in the context of Vietnam

2013 ◽  
Vol 17 (1-2) ◽  
pp. 104-128
Author(s):  
Phan Thi Tuyet Van
Keyword(s):  
Teaching Methods ◽  
Reflective Writing ◽  
Research Results ◽  
English Major ◽  
Study Process ◽  
The Impact ◽  
Process Journal

The article aims to investigate the impact of the reflective writing paper on non- English major learners’ learning autonomy in a Vietnamese context. The data was collected by means of questionnaire, competence tests and interviews. The participants did two reflective writing papers as an intervention during the research. The research results show the possibilities for teachers to modify their teaching methods through analysis of feedback from the subjects. The findings showed that most participants appreciated the role of the reflective writing paper and they were aware of the significance of learning autonomy in their study process. Journal of NELTA, Vol. 17 No. 1-2, December 2012, Page 104-128 DOI: http://dx.doi.org/10.3126/nelta.v17i1-2.8102

scholarly journals Technology Entrepreneurship and the Performance of Enterprises in the Conditions of Covid-19 Pandemic: The Fuzzy Set Analysis of Waste to Energy Enterprises in Poland

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3891
Author(s):  
Piotr Kordel ◽  
Radosław Wolniak
Keyword(s):  
Fuzzy Set ◽  
High Performance ◽  
Qualitative Comparative Analysis ◽  
Flexible Structures ◽  
Implementation Strategies ◽  
Waste To Energy ◽  
Energy Industry ◽  
Technology Entrepreneurship ◽  
Research Results ◽  
The Impact

This article’s aim is to explain the impact of technology entrepreneurship phenomenon on waste management enterprise performance in the conditions of COVID-19 pandemic. The concept of technology entrepreneurship according to the configuration approach and the category of high-performance organization are the theoretical bases of empirical investigation. For the implementation of empirical research, Fuzzy set Qualitative Comparative Analysis (FsQCA) was adopted. The research sample included a group of producers of Refused Derived Fuel (RDF) as a central part of the waste to energy industry located in Poland. The research results showed that the waste to energy sector is highly immune to pandemic threats. While during COVID-19, the basic economic parameters (i.e., sales, profitability and employment) of the entire industry in Poland clearly decreased, the same parameters in the case of the waste to energy industry remained at the same level. The research results allow the formulation of two high-performance models of technology entrepreneurship in the waste to energy industry under COVID-19 conditions. The first model is based on traditional technologies and hierarchical organizational structures, and the second is using innovative technologies and flexible structures. Both technology entrepreneurship models are determined by their emergence as complementary to implementation strategies and the opportunity-oriented allocation of resources within business model portfolios.

Aeroelastic Tailoring of Helicopter Blades

2013 ◽  
Author(s):  
Donatien Cornette ◽  
Benjamin Kerdreux ◽  
Yves Gourinat ◽  
Guilhem Michon
Keyword(s):  
Dynamic Behaviour ◽  
Vertical Shear ◽  
Dynamic Loads ◽  
Modal Approach ◽  
Aeroelastic Tailoring ◽  
Helicopter Blades ◽  
Shear Modification ◽  
Elastic Couplings ◽  
The Impact ◽  
Aerodynamic Lift

The dynamic loads transmitted from the rotor to the airframe are responsible for vibrations, discomfort and alternate stress of components. A new and promising way to minimize vibration is to reduce dynamic loads at their source by performing an aeroelastic optimization of the rotor. This optimization is done thanks to couplings between the flapwise-bending motion and the torsion motion. The impact of elastic couplings (composite anisotropy) on the blade dynamic behaviour and on dynamic loads are evaluated in this paper. Firstly, analytical results, based on a purely linear modal approach, are given to understand the influence of those couplings in terms of frequency placement, aerodynamic lift load and vertical shear modification. Then, those elastic couplings are introduced on a simplified but representative blade (homogeneous beam with constant chord) and results are presented.

scholarly journals Fear and floods in Serbia: Citizens preparedness for responding to natural disaster

2016 ◽  
pp. 303-324 ◽  
Author(s):  
Vladimir Cvetkovic
Keyword(s):  
Natural Disaster ◽  
Random Sample ◽  
Quantitative Research ◽  
Research Results ◽  
Multi Stage ◽  
The Family ◽  
The Republic ◽  
The Impact ◽  
The City ◽  
Safety Procedures

The consequences of the floods that had affected the area of Serbia in 2014 indicated a very low level of preparedness of population to respond to natural disasters. Therefore, the aim of quantitative research is to examine the impact of fear on the willingness of citizens to respond to a natural disaster caused by the flood in the Republic of Serbia. Bearing in mind all local communities in Serbia where floods occurred or there is a high risk of flooding, there was selected a random sample consisting of 19 out of 150 municipalities and 23 towns and the city of Belgrade. In the selected communities, a research was undertaken in those areas that had been most affected in relation to the amount of water or potential risk of flooding. The survey used strategy of testing in households with the use of a multi- stage random sample. The research results indicate that the citizens who have a fear of floods are familiar with safety procedures to a greater extent in relation to citizens who do not have the fear; they have taken the preventive measures; they point out that they still are not ready to respond, but plan to do so in the next 6 months; they would evacuate to the upper floor of the house; they point out that someone in the family has educated them about the flood. In contrast to that, citizens who do not have the fear are not doing anything to prepare themselves to react in such situations, they are confident in their own abilities to cope with the consequences of floods, etc. The originality of the research lies in the fact that in Serbia there has never been conducted a research to examine the state of preparedness of citizens to respond. Bearing in mind that the research is based on the territory of Serbia, conclusions can be generalized to the entire population. The research results can be used when creating a strategy for improving the level of preparedness of citizens to respond.

scholarly journals Energy Saving as an Important Factor in Ensuring Product Competitiveness

2021 ◽  
Vol 2 (48) ◽  
pp. 120-125
Author(s):  
O. P. Vashkiv ◽  
◽  
S. B. Smereka ◽  
Keyword(s):  
Energy Saving ◽  
Specific Energy Consumption ◽  
Environmental Standards ◽  
Manufacturing Enterprise ◽  
Research Results ◽  
Industrial Enterprises ◽  
The Face ◽  
The One ◽  
The Impact

The article is aimed at studying the features of energy saving at a manufacturing enterprise and establishing a cause-and-effect relationship between energy saving and product competitiveness. Due to analyzing and generalizing the research results of domestic and foreign scientists the views of researchers on the process of energy saving at a manufacturing enterprise are systematized; the growing role of energy saving in ensuring energy efficiency and, consequently, product competitiveness is established. The research results show that energy saving at an enterprise is one of its most important assets, the impact of which on the level of product competitiveness is becoming increasingly important in the face of the exacerbating energy and environmental crises. Energy saving, basically focusing on the intensification of production processes and use of energy and energy resources, on the one hand, reduces the level of specific energy consumption and, consequently, the price of the released product while maintaining or increasing its quality; on the other hand, it reduces the carbon loading on the environment, thus contributes to the growth of the company's image among its consumers and partners. Both components are the most important factors in ensuring product competitiveness. The development and implementation of energy saving measures at industrial enterprises, with regard to the industry-specific character of economic entities, market conditions, and the requirements of environmental standards can serve as prospects for further research

Prediction of the Impact of Flow-Induced Inhomogeneities in Self-Compacting Concrete (SCC)

2010 ◽  
pp. 209-215 ◽  
Author(s):  
J. Spangenberg ◽  
N. Roussel ◽  
J. H. Hattel ◽  
J. Thorborg ◽  
M. R. Geiker ◽  
...  
Keyword(s):  
Self Compacting Concrete ◽  
The Impact

Effects of leadership and accounting capacity on accountability through the quality of financial reporting by public organisations in Vietnam

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Yen Thi Tran ◽  
Nguyen Phong Nguyen ◽  
Trang Cam Hoang
Keyword(s):  
Public Sector ◽  
Financial Reporting ◽  
Reporting Quality ◽  
Financial Reporting Quality ◽  
Equation Modeling ◽  
Content Type ◽  
Research Results ◽  
Public Organisations ◽  
The Impact

Purpose By drawing on the institutional theory and contingency theory, this study aims to examine the effects of leadership and accounting capacity on the quality of financial reporting and accountability of public organisations in Vietnam. Furthermore, this paper is to determine the impact of financial reporting quality on accountability. Design/methodology/approach The research model and hypotheses have been tested by partial least squares structural equation modeling, with 177 survey samples obtained from accountants and managers working in the public sector in Vietnam. Findings The research results indicate that leadership and accounting capacity have a positive effect on financial reporting quality; leadership and accounting capacity positively influence accountability; and the quality of financial reporting has a positive impact on accountability. Research limitations/implications The research results provide empirical evidence of the direct impact of leadership and accounting capacity on financial reporting quality and accountability of public organisations in a developing country. Moreover, the current work also provides important evidence for the impact of financial reporting quality on accountability. Practical implications Public sector organisations must realise that leadership and accounting capacity play a vital role in the accounting reform process. Public institutions likewise need to pay attention to develop accounting capacity and promote leadership. Moreover, the results respond to the continuing call for increased citizen trust in public organisations. Originality/value To the best of the authors’ knowledge, this study is the first to examine the chain from leadership, accounting capacity, financial reporting quality and accountability in the context of public sector organisations in an Asian transition market.

The Use of New Media Applications in Corporate Social Responsibility

2021 ◽  
pp. 274-291
Author(s):  
Eda Turanci ◽  
Nefise Sirzad
Keyword(s):  
Corporate Social Responsibility ◽  
New Media ◽  
Social Responsibility ◽  
Research Results ◽  
Different Types ◽  
Media Types ◽  
Corporate Social ◽  
Media Applications ◽  
The Impact

Corporate social responsibility is the responsibility of the corporations towards the stakeholders, the environment, and society. It covers the voluntary practices for the solution of social problems. Similar to other areas, new media applications offer new opportunities in terms of corporate social responsibility practices. In addition, it is now possible for companies to benefit from four different types of media: “paid, earned, shared, and owned media”. The purpose of this study is to reveal how corporations take advantage of paid, owned, earned, and shared media using new media applications in their social responsibility practices. For this purpose, the Vodafone Turkey Foundation's #BuMamaBenden project is selected as a case study and examined. The research results show that new media applications can be used as an effective tool to reach people. Moreover, the coordinated use of these four media types can increase the impact of corporate social responsibility projects and keeps them alive.

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