scholarly journals Influence of Fe-Zn intermetallic layer on corrosion behaviour of galvanized concrete reinforcement

2016 ◽  
Vol 60 (3) ◽  
pp. 91-100
Author(s):  
P. Pokorný
Keyword(s):  
State Of The Art ◽  
Corrosion Behaviour ◽  
Intermetallic Layer ◽  
Point Of View ◽  
External Factors ◽  
Galvanized Steel ◽  
External Layer ◽  
Current Point ◽  
Galvanized Coating ◽  
Intermetallic Layers

Abstract The article summarizes state of the art of the influence of external layer of Fe-Zn intermetallics on corrosion behaviour of galvanized steel in a fresh, hardened and chloride contaminated concrete. Current point of view on formation, composition and crystallography of particular intermetallic Fe-Zn phases, that are present in hot dip galvanized coating. External factors as alloying elements are involved as well. A corrosion resistance of these intermetallic layers (especially ζ-FeZn13) during exposure in concrete is evaluated finally.

Studies and Research on the Corrosion Behavior of Ni-Al2O3 Compound Coatings Obtained by Electrochemical Methods

2020 ◽  
Vol 43 (3) ◽  
pp. 21-25
Author(s):  
Simona BOICIUC ◽  
◽  
◽  
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Behavior ◽  
Corrosion Behaviour ◽  
Composite Coatings ◽  
Point Of View ◽  
Electrochemical Methods ◽  
Dispersed Phase ◽  
Nickel Matrix ◽  
Technical Alumina ◽  
Compound Coatings

The undertaken research which is described in this paper aims at the corrosion behaviour of composite coatings in nickel matrix using as dispersed phase technical alumina with dimensions of 5 μm and their characterization from a microstructural point of view. The corrosion resistance in the saline fog of the coatings is influenced by the microstructure, the stresses developed in the layer and the roughness.

scholarly journals Sustainable Agri-Food Processes and Circular Economy Pathways in a Life Cycle Perspective: State of the Art of Applicative Research

2021 ◽  
Vol 13 (5) ◽  
pp. 2472
Author(s):  
Teodora Stillitano ◽  
Emanuele Spada ◽  
Nathalie Iofrida ◽  
Giacomo Falcone ◽  
Anna Irene De Luca
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Circular Economy ◽  
Social Life ◽  
Food Systems ◽  
State Of The Art ◽  
Terrestrial Ecosystems ◽  
Point Of View ◽  
Social Life Cycle Assessment ◽  
Qualitative Synthesis

This study aims at providing a systematic and critical review on the state of the art of life cycle applications from the circular economy point of view. In particular, the main objective is to understand how researchers adopt life cycle approaches for the measurement of the empirical circular pathways of agri-food systems along with the overall lifespan. To perform the literature review, the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) protocol was considered to conduct a review by qualitative synthesis. Specifically, an evaluation matrix has been set up to gather and synthesize research evidence, by classifying papers according to several integrated criteria. The literature search was carried out employing scientific databases. The findings highlight that 52 case studies out of 84 (62% of the total) use stand-alone life cycle assessment (LCA) to evaluate the benefits/impacts of circular economy (CE) strategies. In contrast, only eight studies (9.5%) deal with the life cycle costing (LCC) approach combined with other analyses while no paper deals with the social life cycle assessment (S-LCA) methodology. Global warming potential, eutrophication (for marine, freshwater, and terrestrial ecosystems), human toxicity, and ecotoxicity results are the most common LCA indicators applied. Only a few articles deal with the CE assessment through specific indicators. We argue that experts in life cycle methodologies must strive to adopt some key elements to ensure that the results obtained fit perfectly with the measurements of circularity and that these can even be largely based on a common basis.

New Trends in Asymptotic Approaches: Summation and Interpolation Methods

2001 ◽  
Vol 54 (1) ◽  
pp. 69-92 ◽  
Author(s):  
Igor V. Andrianov ◽  
Jan Awrejcewicz
Keyword(s):  
Applied Sciences ◽  
Solid Mechanics ◽  
State Of The Art ◽  
Asymptotic Methods ◽  
Perturbation Series ◽  
Review Article ◽  
Point Of View ◽  
Advantages And Disadvantages ◽  
New Methods ◽  
Local Character

In this review article, we present in some detail new trends in application of asymptotic techniques to mechanical problems. First we consider the various methods which allows for the possibility of extending the perturbation series application space and hence omiting their local character. While applying the asymptotic methods very often the following situation appears: an existence of the asymptotics ε → 0 implies an existence of the asymptotics ε → ∞ (or, in a more general sense, ε → a and ε → b). Therefore, an idea of constructing a single solution valid for a whole interval of parameter ε changes is very attractive. In other words, we discuss a problem of asymptotically equivalent function constructions possessing for ε → a and ε → b a known asymptotic behavior. The defined problems are very important from the point of view of both theoretical and applied sciences. In this work, we review the state-of-the-art, by presenting the existing methods and by pointing out their advantages and disadvantages, as well as the fields of their applications. In addition, some new methods are also proposed. The methods are demonstrated on a wide variety of static and dynamic solid mechanics problems and some others involving fluid mechanics. This review article contains 340 references.

Some Possible Lines of Development in Aircraft Engines

1921 ◽  
Vol 25 (123) ◽  
pp. 130-165
Keyword(s):  
Present State ◽  
State Of The Art ◽  
Point Of View ◽  
Aircraft Engines ◽  
Aero Engine ◽  
The Ideal

In the following paper the writer's aim is to indicate certain possible lines of development and research which his own investigations and preliminary experiments have shown to be at least worthy of serious consideration.If we review the present state of the art we find the position to be substantially as follows :—From a thermodynamic point of view the performance of the modern aero engine has approached so nearly to the ideal obtainable from the cycle on which it operates that there is little scope for improvement.

scholarly journals Exchange rate regime choice

2006 ◽  
Vol 53 (3) ◽  
pp. 313-334 ◽  
Author(s):  
Emilija Beker
Keyword(s):  
Decision Making ◽  
Exchange Rate ◽  
Shelf Life ◽  
Exchange Rate Regime ◽  
Flexible Exchange Rate ◽  
Point Of View ◽  
External Factors ◽  
Advantages And Disadvantages ◽  
Complex Process ◽  
Highly Sensitive

The choice of an adequate exchange rate regime proves to be a highly sensitive field within which the economic authorities present and confirm themselves. The advantages and disadvantages of fixed and flexible exchange rate regimes, which have been quite relativized from the conventional point of view, together with simultaneous, but not synchronized effects of structural and external factors, remain permanently questioned throughout a complex process of exchange rate regime decision making. The paper reflects the attempt of critical identification of the key exchange rate performances with emphasis on continuous non-uniformity and (un)certainty of shelf life of a relevant choice.

scholarly journals Dostosowanie dochodów do zadań samorządu terytorialnego w Polsce. Praktyka i rekomendacje

Studia BAS ◽  
2021 ◽  
Vol 1 (65) ◽  
pp. 21-41
Author(s):  
Elżbieta Malinowska-Misiąg ◽  
Wojciech Misiąg
Keyword(s):  
Local Government ◽  
Point Of View ◽  
External Factors ◽  
Fiscal Equalization ◽  
Effective System ◽  
New System

The article deals with the problem of adjusting the revenues of Polish local government units (LGUs) to their tasks. The problem was analysed both from the point of view of the possibility of increasing LGU revenues and designing an effective system of fiscal equalization. The authors discussed the external factors which limit the possibilities of introducing such a desirable system. Next, based on the presented analysis, they drew conclusions regarding the necessary revision of the existing scheme. The article concludes with specific recommendations for a new system of financing LGUs, assuming, in particular, far-reaching changes in the algorithms for determining and dividing general subsidies, as well as a fundamental reduction in the scope of the so-called commissioned tasks.

scholarly journals Determination of the composition of multilayer plastic packaging with NIR spectroscopy

Detritus ◽  
2020 ◽  
pp. 62-66
Author(s):  
Xiaozheng Chen ◽  
Nils Kroell ◽  
Alexander Feil ◽  
Thomas Pretz
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared ◽  
State Of The Art ◽  
Nir Spectroscopy ◽  
Waste Recycling ◽  
Point Of View ◽  
Plastic Packaging ◽  
Post Industrial ◽  
Detection And Separation

In food and medical packaging, multiple layers of different polymers are combined in order to achieve optimal functional properties for various applications. Flexible multilayer plastic packaging achieves a reduction in weight compared to other packaging products with the same function, saving material and in transportation costs. Recycling of post-industrial multilayer packaging was achieved by some companies, but the available technologies are limited to specific polymer types. For post-consumer waste, recycling of multilayer packaging has not been achieved yet. One of the main challenges in plastic sorting is that the detection and separation of multilayer packaging from other materials is not possible yet. In this study, the possibility to detect and sort flexible multilayer plastic packaging was investigated with near-infrared spectroscopy, which is the state-of-the-art technology for plastic sorting. The results show that from a detection and classification point of view, sorting of monolayer, two- and three-layers samples under laboratory conditions is possible. According to the captured data, the sequence of layers has little influence on the spectra. In case of glossy samples, the spectra are influenced by printed surfaces. With an increase in thickness, the spectra get more characteristic, which makes the classification easier. Our results indicate that the sorting of post-consumer multilayer plastic packaging by main composition is theoretically achievable.

scholarly journals Mystical Teaching About ‘Conscience’ in the Occult Concept of the ‘Fourth Way’

2019 ◽  
pp. 70-87
Author(s):  
Олег Лемешев
Keyword(s):  
Human Life ◽  
Personal Responsibility ◽  
Critical Assessment ◽  
Point Of View ◽  
External Factors ◽  
Orthodox Christian ◽  
Research Task ◽  
Fourth Way ◽  
Christian Thought ◽  
And Behavior

Целью данной статьи является анализ изучения понятия «совесть» в оккультной концепции «Четвёртого пути». В качестве исследовательской задачи автор совершил попытку оценить ложные взгляды данной доктрины, а также охарактеризовать их с нейтральной стороны и дать им критическую оценку с точки зрения православного богословия. Кроме того, выделяются и описываются особенности оккультного учения, в которых лжеучителя пытаются перекинуть личную ответственность за свои грехи на абсолютно внешние факторы, не имеющие никакого отношения к жизни и поведению человека. Разоблачены действия оккультистов, которые благодаря подменам понятий пытаются абстрагировать христианскую мысль и, оперируя своим ложным учением, пытаются внести в православную терминологию ложные понятия. В работе наглядно показано, что учение данной доктрины приводит не к совести, а к экстазу. Автор приходит к выводу, что учение «Четвёртого пути» о «совести» не имеет никакого отношения к христианской совести, и вместо того, чтобы созидать личность, наоборот, личность у них разрушается и полностью пропадает. Данная проблема мало изучена и требует дальнейших исследований. The goal of this article is to explore into the idea of “conscience” in the occult concept of the Fourth Way movement. As a research task, the author attempted to check the misleading creed of movement as well as to characterize them from the neutral side and give them a critical assessment from the point of view of the Orthodox theology. In addition, the author are highlights the means, by which the movement leaders seek to transfer personal responsibility for one’s sins to external factors that are not related to human life and behavior. The author explains the movement’s activities, which involve substitution of concepts as they seek to abstract Christian thought and to introduce false ideas into the Orthodox Christian terminology. The author argues that teaching of this doctrine leads not to conscience but to an ecstasy. The author concludes that the teachings of the Fourth Way on “conscience” have nothing to do with the Christian conscience as it they harm and deconstruct personhood instead of affirming it. According to the author, the issue has not been studied enough so far and requires further research.

Entrepreneurship and fintech development: comparing reward and equity crowdfunding

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ciro Troise ◽  
Diego Matricano ◽  
Elena Candelo ◽  
Mario Sorrentino
Keyword(s):  
Design Methodology ◽  
State Of The Art ◽  
Methodological Approach ◽  
Point Of View ◽  
Comparative Approach ◽  
Current Debate ◽  
Content Type ◽  
Equity Crowdfunding ◽  
Research Propositions ◽  
Practical Implications

Purpose Starting from the state-of-the-art of Fintech development, this study aims to propose some research propositions comparing reward-crowdfunding (RCF) and equity-crowdfunding (ECF). In this sense, the present research provides a comprehensive analysis of fintech development and – to conceptualize the comparison between RCF and ECF – it focuses on campaigns’ characteristics, aims and post-campaigns scenarios. Design/methodology/approach All the research propositions related to the comparison between RCF and ECF are rooted in dedicated literature. The methodological approach adopted in the present paper can be referred to theorizing. Findings This study suggests that five key elements characterize the development of fintech: regulation, infrastructure, technologies, finance and innovations. The research provides nine propositions: four related to the campaigns’ characteristics; two related to the use of crowdfunding models by entrepreneurs; and three related to the performance of crowdfunded companies. Practical implications By offering nine research propositions, this study is expected to foster and support the investigation of fintech development from an entrepreneurial and managerial point of view. Originality/value To the best of authors’ knowledge, this study is among the first to explore the fintech development and to propose a comparative approach between RCF and ECF. This research contributes to the current debate on fintech development as well as on the comparison between crowdfunding models.

Sign in / Sign up

Export Citation Format

Share Document