scholarly journals Formation flight investigation for highly efficient future civil transport aircraft

2016 ◽  
Vol 120 (1229) ◽  
pp. 1081-1100
Author(s):  
G.J. Durango ◽  
C. Lawson ◽  
A.Z. Shahneh

ABSTRACTFormation flight could greatly assist the air transport industry in tackling the challenges of environmental impact, excessive reliance on fuel and overcapacity. Previous studies have shown drag reductions leading to significant fuel savings for aircraft in formation relative to their solo flight. Safety is guaranteed with the use of extended formation distances, and practical implementation issues could be solved in the near future. Since studies so far have focused on existing aircraft configurations and technology, a case study using a strut-braced wing airliner was carried out to ascertain its applicability to less conventional craft. The present results did not indicate such clear-cut benefits. If formation flight is to be successful and beneficial for the next generations of aircraft, it will be vital to consider its interaction with new technologies developed for highly efficient operation, in particular those aimed at reduction of aircraft drag such as laminar flow, and to do so early in the design of aerospace vehicles and wider systems.

2021 ◽  
Vol 27 (9) ◽  
pp. 725-733
Author(s):  
A. A. Volkova ◽  
V. A. Plotnikov ◽  
Yu. A. Nikitin ◽  
N. I. Vasil’ev

Aim. The presented study aims to examine the specific features as well as organizational and technical aspects of production logistics, taking into account its potential for using digital technologies.Tasks. The authors consider the essence, purpose, and goals of production logistics; analyze major logistics systems used in production logistics; assess the prospects for using digital technologies in this sphere.Methods. This study uses the methodology of strategic and logistics management, the systems approach, life cycle theory, general scientific methods of generalization, comparative, retrospective, and structural-functional analysis.Results. The production and logistics systems of a company are considered as equivalent elements in the context of managing material flows in internal and external supply chains and achieving the company’s operational and development goals. In this regard, production logistics is shown as part of both logistics and production, which affects its organization and architecture. Under modern conditions, an approach based on certain data is widely used in production logistics. It requires active introduction of digital technologies in production logistics, the purpose of which is not to achieve technical or organizational perfection of business processes, but to select technologies from the perspective of creating additional value.Conclusions. In the course of the study, three categories of activities associated with production logistics are identified. For each of these categories, the prospects and recommended classification of digital technologies are defined. Particular emphasis is placed on improving the quality and efficiency of data use. According to the authors, all information systems and digital technologies used in production logistics should be highly reliable. Thus, introduction of any new technologies in production logistics requires careful consideration. Regardless of the type of technology, a systems approach to the organization and development of production logistics is a prerequisite for the efficient operation of the company as a whole.


2010 ◽  
Vol 3 (1) ◽  
Author(s):  
Lizzy Bleumers ◽  
Kris Naessens ◽  
An Jacobs

This article introduces Proxy Technology Assessment (PTA) as a methodological approach that can widen the scope of virtual world and game research. Studies of how people experience virtual worlds and games often focus on individual in-world or in-game experiences. However, people do not perceive these worlds and games in isolation. They are embedded within a social context that has strongly intertwined online and offline components. Studying virtual experiences while accounting for these interconnections calls for new methodological approaches. PTA answers this call.Combining several methods, PTA can be used to investigate how new technology may impact and settle within people's everyday life (Pierson et al., 2006). It involves introducing related devices or applications, available today, to users in their natural setting and studying the context-embedded practices they alter or evoke. This allows researchers to detect social and functional requirements to improve the design of new technologies. These requirements, like the practices under investigation, do not stop at the outlines of a magic circle (cf. Huizinga, 1955).We will start this article by contextualizing and defining PTA. Next, we will describe the practical implementation of PTA. Each step of the procedure will be illustrated with examples and supplemented with lessons learned from two interdisciplinary scientific projects, Hi-Masquerade and Teleon, concerned with how people perceive and use virtual worlds and games respectively.


Author(s):  
Le Tkhi Myn Khuiien ◽  
Yuriy Nikolayev

Comparative analysis of cluster instruments for economic development of Ukraine and Vietnam is carried out. The study showed that the absolute majority of the clusters operating in Ukraine have significant strategic gaps between strategic goals and resources for their implementation. In order to eliminate strategic gaps, a set of practical recommendations has been substantiated, which generally consists of the following main elements: inclusion in the current legislation of the concept of "innovative industrial cluster of the sixth technological order"; providing the subjects of such clusters with innovative tax benefits; provision of concessional lending for intra-cluster innovation projects. In terms of the effectiveness of the use of cluster instruments for economic development, Vietnam is significantly ahead of Ukraine. The highest efficiency of cluster development was achieved in Vietnam for fourteen of the sixteen positions we analyzed, and in Ukraine, the highest efficiency was not achieved for any position. For each of the ten cluster instruments of economic development that are not used in Ukraine, we substantiated the feasibility and effectiveness of their implementation in our state. In order to introduce each of the most important cluster instruments of economic development, an appropriate legislative framework should be created in Ukraine, as well as a system of by-laws for its practical implementation. Vietnam has been well done in the cluster industrial policy. To the end of 2020, there are 260 industrial parks in the whole country (besides, there are some industrial parks acquired licensing but not yet constructed or having planned but not yet approved). Hanoi plans to build 43 industrial clusters in 2021. To ensure efficient operation of industrial clusters, Hanoi would provide supporting policies for enterprises and business households relocating their operation into industrial clusters, while setting up a list of service fees for all industrial clusters in the city. Hanoi plans to further promote investment and higher occupancy rate in industrial clusters, gradually transforming the current management model towards greater efficiency in operation of industrial clusters.


2020 ◽  
Vol 1 (1) ◽  
pp. 23-33
Author(s):  
Zahid Iqbal ◽  
Rehan Aslam

The staple objectives of this study are to determine the importance and worth of forensic accounting in the context of Pakistan. Accounting frauds are increasing day by day, especially in the commercial sector of Pakistan. In the majority of Pakistani companies' accountants are inexperienced and nonprofessional and unable to understand the new financial reporting standard that becomes a cause of enhancing accounting frauds. This study followed a qualitative approach to collect data through interviews from both participants, including academicians and practitioners who are working in a prestigious academic institution and business organization where the concept of forensic accounting is taught and implemented with the right letter and spirit. Finding have been derived by transcribing data through coding and taking essential themes regarding the practical implementation of forensic accounting practices in Pakistan by using NVIVO software. The findings of the study indicated that forensic accounting scope is broad, especially regarding the increasing ratio of white-collar crimes and digital crimes, and in a near-future lot of opportunities will be arises in Pakistan in the context of forensic accounting. Both academicians and practitioners agreed that the importance of forensic accounting could not be overlooked, especially concerning digital and white-collar frauds both in the private sector and public sector organizations.


2021 ◽  
Vol 250 ◽  
pp. 03007
Author(s):  
Zhala Rzayeva ◽  
Aysel Guliyeva ◽  
Arzu Miriyeva

This paper focuses in the natural and economic effects of renewable energy sources in the developing countries using a case of Azerbaijan. Traditional fuel supplies dependent on gas, oil, and coal are highly useful for the development of a country’s economy. However, certain detrimental effects of these commodities on the environment have limited us to use these resources under clear cut-off points. As a result, we were able to turn our intuition into renewable energy sources. By using renewable energy sources, social, natural, and financial challenges can be ignored because these sources are considered harmless to the atmosphere, as there are little or virtually no fumes discharged, and toxic gases such as carbon dioxide, carbon monoxide, and sulfur dioxide. Renewable electricity would be a major advantage for power generation in the near future so we will reuse these assets to generate useful electricity. The paper discusses these and other issues with the implementation of renewable energy and assess the potentials of Azerbaijan in adapting this type of energy in the future.


2020 ◽  
Vol 8 (3) ◽  
Author(s):  
Maxim Anatolyevich Sorochinsky ◽  
Elizaveta Afanasevna Barakhsanova ◽  
Elena Zotikovna Vlasova ◽  
Mikhail Semenovich Prokopyev ◽  
Arkady Eduardovich Burnashev

Teacher training can assist in initiating digital changes in education. However, to achieve this, the training should use leading examples from the field of digital education solutions and technologies, while university and school educators should be trained to apply them in their work and to create high-tech educational startups in the field of e-learning. The goal of this study was to increase the professional competencies of teachers by conducting a corporate course that would prepare the teachers of the university in Yakutia to apply e-learning methods. The article demonstrates that the introduction of e-learning at the university is an important comprehensive process that implies transformation of all education components under the influence of modern technologies. Its practical implementation requires changing the goals, organizational forms, and technologies of educational activities in line with new technologies as well as the development of productive strategies for integrating the created innovations into the traditional learning process. For this purpose, the authors conducted a sociological study that helped identify the main problems associated with this type of training (for example, developing a course is time-consuming and a lack of required skills to develop courses). Based on the obtained data, the authors proposed a corporate course for university teachers on the creation of educational content for e-learning. It was shown that when applying new types of educational activities, teachers should combine traditional and new technologies, which contributes to the innovative training of teachers to meet the requirements of the digital society. This study focused on practical issues, since the research results were implemented in the work of the North-Eastern Federal University (NEFU), the base of the research. The results can be used when training teachers to apply e-learning methods in other educational institutions.


Author(s):  
Peter Marks

This chapter deals with of recent novels and films that project forward into the near future, suggesting where surveillance might be heading. In Kim Stanley Robinson’s 2312, surveillance is figured into a future world of interplanetary environmentalism, in protecting planets and helping to monitor the ‘rewilding’ of an environmentally devastated Earth. Neill Blomkamp’s film Elysium fashions another Earth under environmental stress, patrolled by stringent surveillance operatives and systems that also screen the put-upon inhabitants from the eponymous eutopian space station literally and metaphorically above them. The film concentrates on the utopian urges of that population in their endeavour to overcome oppressive monitoring and receive medical treatment reserved for those on Elysium. Dave Eggers conjures up an apparently eutopian hi-tech company, The Circle, in his novel of the same name, representing how new technologies manipulate data and images for economic, social and political control. Spike Jonze’s film Her explores the relationship between surveillance and intimacy through the interaction between a human and an operating system. As with Eggers’ The Circle, Her investigates how data confuses definitions of identities as it allows for the fusion of surveillance and intimacy. These novels and films suggest some of the ways in which new forms of surveillance promise or threaten to fashion the worlds of the future. As with all such texts, they suggest options and present narratives and characters that enable readers and viewers to think and act so that the future approximates the eutopian rather than the dystopian.


Author(s):  
Nemanja Berber ◽  
Agneš Slavić

Agribusiness firms are faced with several challenges like globalization, internationalization of business, the introduction of new technologies, especially the digitalization process, higher competitiveness of foreign agribusiness firms, etc. One of the very important challenges is the effective management of human capital. Although it is one of the most important management activities in each firm, human resource management (HRM) in the agribusiness sector is still unexplored in terms of scientific research and practical implementation. This chapter explores the nature and specifics of human resources management in agribusiness enterprises, and presents the practice of the basic and most important HRM activities in agribusiness firms in Serbia, on the example of 12 organizations that were investigated. The methodology used in the research is based on a theoretical investigation of available literature and data from worldwide databases but also from Cranet project, one of the largest and well-known, world-wide HRM projects.


Author(s):  
Jesús Parra-Sáez

Human perfection has been one of the main objectives of the human species since the appearance of Homo sapiens, but contemporary biomedical technologies represent a promise to achieve it in the near future. In view of the new possibilities offered by new technologies, a scientific-philosophical theoretical debate has emerged between those who are in favor of its use on humanity for non-therapeutic purposes (posthumanists) and those who reject it (bioconservatives). In this chapter, the so-called “enhancement technologies,” the problems derived from their use with the aim of radically altering human abilities, and some of the most recent practical cases that have transcended the theoretical debate about their legitimacy are analyzed.


Author(s):  
Konstantin I. Matveev

Abstract Practical implementation of ship drag reduction techniques can lead to substantial fuel savings and lessening environmental impacts of maritime transportation. One of such technologies is based on injecting air underneath ship hulls, which results in the formation of thin air cavities that decrease the wetted hull surface and hence its frictional drag. In realistic sea wave conditions, however, these cavities become unsteady and may easily disintegrate upon interaction with high-amplitude abnormal waves. In this study, the air-cavity dynamics in such situations is simulated with a potential flow model and empirical correlations. A method for controlling the air cavity by varying the air supply rate is numerically investigated. It is shown that degradation of the air-cavity power savings in the event of a rogue wave passing can be partly mitigated by briefly boosting the air supply right after the abnormal wave occurrence. For one considered example, it is found that 20% of power savings is lost in a condition with abnormal waves and constant air supply. In case of temporary augmentation of air injection, the overall decrease of power savings is reduced to 10%.


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