scholarly journals Test Loading of Structures with a Suspect Resistance

2021 ◽  
Vol 11 (8) ◽  
pp. 3424
Author(s):  
Tuomo Poutanen ◽  
Sampsa Pursiainen ◽  
Jari Mäkinen
Keyword(s):  
Service Time ◽  
Point Of View ◽  
Theoretical Point ◽  
Test Load ◽  
Load Bearing ◽  
Special Cases ◽  
Significant Research ◽  
Research Questions ◽  
Test Loading

The reliability of load-bearing structures is normally secured through codes, a competent structural design and proper execution inspection. Alternatively, the reliability can be obtained via skilled test loading, which is a feasible technique both in the construction of new structures and in the load-bearing verification of existing ones. Although the current codes lack instructions for test loading, they are, however, used in special cases; for example, when the reliability of the structures is doubtful due to a defect, or when the structure is suspected to have especially high resistance variability. Test loading involves significant research questions that need to be addressed, including: What is the test load in comparison with the expected maximum service time load or the characteristic load? How can the instantaneous test load be compared with the actual long-term service-time load? Does the test loading harm the structure, and what is the target reliability in the test loading calculation? In this paper, we approach these questions from a theoretical point of view and propose how a suitable test load can be chosen in practice using an approximate and a precise approach.

scholarly journals The Paradox between Consumerism and Sustainability - How to approach the marketing professionals with this theme

2013 ◽  
Vol 4 (2) ◽  
pp. 29
Author(s):  
Afonso Carlos Braga
Keyword(s):  
Point Of View ◽  
Growth Strategies ◽  
Sustainable Resources ◽  
Present Rate ◽  
One Step ◽  
Research Questions ◽  
Set Up ◽  
Develop Market ◽  
Near Future

Much has been said these days about the World’s limited capacity to provide sustainable resources vis a vis the growing population's demand for goods and supplies in a planet of finite resources. According to the Living Planet Report, produced by the NGO World Wildlife Fund (WWF): “At humanity's present rate of consumption, by 2030 we'll need the resources of two Earths just to survive long-term. There are really two options: start building another Earth, or drastically change our lifestyles. Which one is supposed to be easier?”[1]The present article addresses this issue from the point of view of the marketing executives of big companies, responsible to lead the communication and growth strategies of those companies, often encouraging 'consumerism' to meet the profit and revenue growths. The idea was to understand if this topic is relevant to these professionals,hence their companies, and raise some hypotheses of how to approach this problem in order to provoke those companies to practice "conscious marketing". Going one step further, does the type of organizational paradigm in which the executive company acts should influence the way to approach this professional when conducting personal interviews to collect data? An initial analysis on the theory of how to develop market research questions to avoid bias and/or induced responses, will lead to the article conclusion of how to set up a questionnaire that will be taken into consideration in a near future, at the masters’ thesis of the author.[1] Source:http://io9.com/5664078/humanity-will-need-two-earths-to-sustain-itself-in-just-twenty-years, access 02 dec 12

Ivan Petrović, Photographer, Archivist and Artist: Interview with Ivan Petrović

2017 ◽  
pp. 4-9
Author(s):  
Miha Colner ◽  
Ivan Petrović
Keyword(s):  
Point Of View ◽  
Artistic Expression ◽  
Film Production ◽  
Theoretical Point ◽  
Artistic Practice ◽  
Photographic Image ◽  
The Past ◽  
Archival Work

Ivan Petrović (1973) has been working in the fields of photography and art for twenty years as a researcher, creator and collector. Since 1997, he has been creating and publishing photographic projects that reflect the spirit of space and time in which they are created, while in his works he uses both documentary approaches as well as research principles. In 2011, together with photographer Mihail Vasiljević, he founded a para-institution, the Centre for Photography (CEF). Despite lacking its own premises, infrastructure or funds for performing its activities, the institution deals with the search, preservation, collection and analysis of local photographic materials from recent history. In the past ten years, Petrović also moved his artistic practice beyond mere artistic expression, since he addresses the phenomena of photography from an analytical-theoretical point of view. His interest lies in the nature of the photographic image and its role in society and historiography. In this spirit, long-term projects such as Documents (1997–2008), Images (2002–), Portfolio Belgrade (2015–) and the latest film production were created. The interview with Ivan Petrović took place on 1 September 2017 in Belgrade. The main themes were the role of photography in the dominant history, the boundary between one’s own practice and archival work, photography as an art and the likes. Keywords: collection, documentary, photography's role, preservation, research

scholarly journals The Effect of Visas on Migration Processes

2017 ◽  
Vol 51 (4) ◽  
pp. 893-926 ◽  
Author(s):  
Mathias Czaika ◽  
Hein de Haas
Keyword(s):  
Point Of View ◽  
Theoretical Point ◽  
Long Term Effects ◽  
Policy Regimes ◽  
Policy Effects ◽  
Net Migration ◽  
Short And Long Term ◽  
Migration Flows ◽  
Migrant Groups

The effectiveness of migration policies has been widely contested. However, because of methodological and conceptual limitations, evidence has remained inconclusive. Moreover, prior studies focus on the effects of policies on inflows and fail to assess the simultaneous effect of policies on outflows. This is essential from a theoretical point of view as immigration restrictions may reduce both inflows and outflows and, hence, overall circulation. This renders the effect of immigration restrictions on net migration theoretically ambiguous. To fill this gap, and using unique migration and visa data from the Determinants of International Migration (DEMIG) project, this paper assesses the short- and long-term effects of travel visa policy regimes on bilateral immigration and emigration dynamics. The results suggest that travel visa policies significantly decrease inflows, but this effect is undermined by decreasing outflows of the same migrant groups. This confirms that migration restrictions decrease circulation and tend to encourage long-term settlement, and thereby sharply reduce the responsiveness of migration to economic fluctuations in destination and origin societies. We also identify asymmetric policy effects with migration flows declining only very gradually after a visa introduction but increasing almost immediately after visa removal.

scholarly journals Identifying Strategies as a Ploy for Overcoming Negative Effects of COVIDization of Economy

2021 ◽  
Vol 27 (4) ◽  
pp. 489-503
Keyword(s):  
Organizational Development ◽  
Value Added ◽  
Point Of View ◽  
Theoretical Point ◽  
Balance Scorecard ◽  
Negative Effects ◽  
Short Term ◽  
Specific Goal ◽  
External Conditions

The main goal of this publication is to highlight the importance of the strategy as a ploy to overcome the negative effects as a result of COVIDization of the economy. The term COVIDization of the economy is the term that best describes the situation caused by COVID-19 in the short term and the long term consequences it will have for the business. The first wave presented the companies the economic challenges that they had to deal with in the short term. The subsequent two new waves also determined the need for strategic changes on the part of companies. In these conditions, all five strategies derived by Mintzberg appear – plan, a pattern of behavior, positioning, ploy, perspective. The article substantiates from a theoretical point of view the importance of strategy as a ploy through some of the most popular concepts used in strategic management - McKinsey’s 7S, the Pyramid for organizational development; through the Value-added chain, the Strategic map and Balance scorecard. Viewed in this way, “strategy” means the definition (undertaking) of a set of actions to achieve a specific goal under certain, set as a result of COVIDization, external conditions and available internal prerequisites. The presented empirical data are the result of a study conducted in the period March-April, 2020.

Partnerstwo Wschodnie po 10 latach: sukces czy porażka, realizm czy iluzja?

2019 ◽  
Vol 17 (2) ◽  
pp. 9-39
Author(s):  
Beata Piskorska
Keyword(s):  
Point Of View ◽  
Research Approach ◽  
The European Union ◽  
Eastern Partnership ◽  
Eu Foreign Policy ◽  
Official Policy ◽  
Strategic Goals ◽  
Research Questions ◽  
The Eu

It has been ten years since Poland and Sweden proposed the Eastern Partnership project, which was subsequently adopted on 7 May 2009 by the EU Council at the Prague Summit as the official policy of the European Union. It is a component of the broader EU foreign policy – the European Neighbourhood Policy, which was created in 2004. During this time, the EU has developed many forms of dialogue and cooperation with the six countries covered by the programme. Half of the countries have signed and started to implement new agreements to strengthen their relations. However, the Eastern Partnership is currently undergoing a serious test. Today, the biggest challenge of fundamental importance is the ongoing armed conflict in eastern Ukraine and the annexation of Crimea by Russia, which is a sign of a return to geopolitics in the region. These events have significantly changed the outlook and conditions under which the Eastern Partnership is implemented. Therefore, it is worth trying to answer a few research questions: has the Partnership proved to be a useful tool for attracting beneficiary countries to the EU? Have the initial and long-term objectives been achieved? Finally, is the project worth strengthening and continuing? The article will analyse the specificity of the programme, including strategic goals and their evolution, and attempt to assess the implementation of assumptions and instruments from the point of view of the research approach, which is the transformational power of the EU.

scholarly journals Security Measurement for Unknown Threats Based on Attack Preferences

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Lihua Yin ◽  
Yanwei Sun ◽  
Zhen Wang ◽  
Yunchuan Guo ◽  
Fenghua Li ◽  
...  
Keyword(s):  
Nash Equilibrium ◽  
Network Security ◽  
Spatial Structure ◽  
Learning Strategy ◽  
Point Of View ◽  
Optimal Timing ◽  
Theoretical Point ◽  
Information Sharing Mechanism ◽  
Exact Security

Security measurement matters to every stakeholder in network security. It provides security practitioners the exact security awareness. However, most of the works are not applicable to the unknown threat. What is more, existing efforts on security metric mainly focus on the ease of certain attack from a theoretical point of view, ignoring the “likelihood of exploitation.” To help administrator have a better understanding, we analyze the behavior of attackers who exploit the zero-day vulnerabilities and predict their attack timing. Based on the prediction, we propose a method of security measurement. In detail, we compute the optimal attack timing from the perspective of attacker, using a long-term game to estimate the risk of being found and then choose the optimal timing based on the risk and profit. We design a learning strategy to model the information sharing mechanism among multiattackers and use spatial structure to model the long-term process. After calculating the Nash equilibrium for each subgame, we consider the likelihood of being attacked for each node as the security metric result. The experiment results show the efficiency of our approach.

Legacies and Memories in Movements

2018 ◽  
Author(s):  
Donatella della Porta ◽  
Massimiliano Andretta ◽  
Tiago Fernandes ◽  
Eduardo Romanos ◽  
Markos Vogiatzoglou
Keyword(s):  
Social Movements ◽  
Point Of View ◽  
Theoretical Point ◽  
Long Term Effects ◽  
Democratic Transitions ◽  
Critical Junctures ◽  
Transitions To Democracy ◽  
Long Term Impact ◽  
The Impact

This volume addresses long-term effects of democratic transitions on social movements in Italy, Greece, Portugal, and Spain. From the theoretical point of view, the main focus of reflection is on the long-term impact of eventful moments on social movements, especially the causal mechanisms through which legacies and memories of transformative protest events are produced and reproduced over time, enhancing and constraining contemporary movements’ repertoires and frames. The paths of democratic transitions set norms and institutions that affect protests in the long term. Without taking a deterministic view, we examine the ways in which the past is revisited and read anew how stories are selected, what is resilient, and what is transformed. While research on social movements started in Europe with historical work on labor movements, the impact of historical legacies and memories on social movements has not been much theorized. More in general, while there is a growing interest in memory, there is little systematic theory or comparative research on ways in which important events have long-lasting institutional consequences and are remembered by future generations. With this volume, we address this gap by reflecting on the ways in which critical junctures, especially the ones produced through mobilization from below, affect the social movements that follow. In particular, we analyze transitions to democracy as points of departure and look at the ways in which their paths—and especially social movements’ participation in them—play a role in enhancing and constraining the movements that follow.

Timber Auctions in the Context of the Modern Auction Theory

2007 ◽  
pp. 86-94
Author(s):  
A. Manakov
Keyword(s):  
Theoretical Analysis ◽  
Auction Theory ◽  
Point Of View ◽  
Theoretical Point ◽  
English Auction ◽  
Analysis And Evaluation

The article provides theoretical analysis and evaluation of the timber auctions reforms in Russia. The author shows that the mechanism of the "combined auctions", which functioned until recently, is more appropriate from the theoretical point of view (and from the point of view of the Russian practice) as compared to the officially approved format of the English auction.

Selective statistical estimates of multi-year monthly concentrations of biogenous pollution of small rivers of the Northwest zone of the Russian Federation

2020 ◽  
pp. 9-13
Author(s):  
Sergey Kovalenko
Keyword(s):  
Statistical Processing ◽  
Point Of View ◽  
Small Rivers ◽  
Statistical Parameters ◽  
Monthly Data ◽  
Statistical Estimates ◽  
Scientific Task ◽  
The Russian Federation ◽  
Agricultural Areas

The management of surface watercourses is an urgent scientific task. The article presents the results of statistical processing of long-term monthly data of field observations of hydrological and hydrochemical parameters along the Upper Yerga small river in the Vologda region. Sampling estimates of statistical parameters are obtained, autocorrelation and correlation analyzes are performed. The limiting periods from the point of view of pollution for water receivers receiving wastewater from drained agricultural areas are identified.

Masonry: the brittle or plastic material?

2019 ◽  
pp. 22-28
Keyword(s):  
Plastic Material ◽  
Experimental Studies ◽  
Point Of View ◽  
Plastic Properties ◽  
Plastic Deformations ◽  
Base Materials ◽  
Stress States ◽  
Creep Deformations ◽  
Structural Point

The results of experimental studies of masonry on the action of dynamic and static (short-term and long-term) loads are presented. The possibility of plastic deformations in the masonry is analyzed for different types of force effects. The falsity of the proposed approach to the estimation of the coefficient of plasticity of masonry, taking into account the ratio of elastic and total deformations of the masonry is noted. The study of the works of Soviet scientists revealed that the masonry under the action of seismic loads refers to brittle materials in the complete absence of plastic properties in it in the process of instantaneous application of forces. For the cases of uniaxial and plane stress states of the masonry, data on the coefficient of plasticity obtained from the experiment are presented. On the basis of experimental studies the influence of the strength of the so-called base materials (brick, mortar) on the bearing capacity of the masonry, regardless of the nature of the application of forces and the type of its stress state, is noted. The analysis of works of prof. S. V. Polyakov makes it possible to draw a conclusion that at the long application of the load, characteristic for the masonry are not plastic deformations, but creep deformations. It is shown that the proposals of some authors on the need to reduce the level of adhesion of the mortar to the brick for the masonry erected in earthquake-prone regions in order to improve its plastic properties are erroneous both from the structural point of view and from the point of view of ensuring the seismic resistance of structures. It is noted that the proposal to assess the plasticity of the masonry of ceramic brick walls and large-format ceramic stone with a voidness of more than 20% is incorrect, and does not meet the work of the masonry of hollow material. On the basis of the analysis of a large number of research works it is concluded about the fragile work of masonry.

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