scholarly journals Assessment of aircraft coating resistance to lighting strikes

2021 ◽  
Author(s):  
Matúš Sudin ◽  
◽  
Pavol Pecho
Keyword(s):  
Main Part ◽  
Point Of View ◽  
Economic Factors ◽  
Technical Equipment ◽  
Metallic Coatings ◽  
Economic Point ◽  
Lightning Strikes ◽  
Current State ◽  
Introductory Part

The paper evaluates the damage caused by lightning strikes on various types of aircraft coatings, the extent of the damage and the evaluation of technical and economic factors. The aim of the work is to evaluate and compare the damage after lightning strikes on metallic and non-metallic coatings of aircraft and to find out which coatings are more advantageous from a technical and economic point of view for use in practice. In the introductory part, the work describes the current state, the coating of aircraft, their function and application and the phenomenon when the aircraft is struck by lightning. Subsequently, the work deals with selected coatings and briefly describes them. The main part describes all parts of the performed experiment, samples and technical equipment used for the experiment and compares the damage on selected types of coatings. The last part of the work deals with the evaluation of results, based on which it evaluates the technical and economic advantages anddisadvantages.

DECISION PRINCIPLES FOR ASCENT SUPPORTS IN BUILDING CONSTRUCTION

2014 ◽  
Vol 1 (1) ◽  
Author(s):  
Dieter Schlagbauer ◽  
Christian Hofstadler ◽  
Cornelia Ninaus
Keyword(s):  
Empirical Studies ◽  
Economic Value ◽  
Scale Up ◽  
Point Of View ◽  
Construction Sites ◽  
Economic Point ◽  
Current State ◽  
Frequency Of Use ◽  
A Site ◽  
Economic Comparison

Ladders are the ascent system most commonly used to scale up a building, due to the low initial costs compared to other ascent equipment. The insufficiency of this approach is shown in an economic comparison of ladders, stair towers, and scaffoldings with integrated ascent support. Based on empirical studies, cost data and the current state of scientific knowledge, the ascent support with the highest economic value can be determined by considering safety, cost, time, stress, physical stress and strain, and frequency of use. A survey evaluated vertical transport routes, the ascent systems ladders, stair towers, and scaffoldings with integrated ladders. The findings indicate that from an economic point of view, ladders should be used only on construction sites where less than 54 ascents were performed each day. This leads to the assumption that for typical construction sites, with at least 6 ascents per person per day and a site usage for a period longer than one week, the operation of ladders is uneconomical.

scholarly journals RATIONALIZATION OF PRODUCTION OF SHAPED INSERTS FOR ROTOR CASTING

2021 ◽  
Vol 2021 (4) ◽  
pp. 4803-4809
Author(s):  
PAVEL DOSTAL ◽  
◽  
MAREK SADILEK ◽  
Keyword(s):  
Technological Process ◽  
Working Conditions ◽  
Main Part ◽  
New Technologies ◽  
Die Casting ◽  
Point Of View ◽  
Economic Point ◽  
Casting Technology ◽  
Technology Of Production ◽  
Rotor Casting

The article deals with the rationalization of the production of shaped inserts for casting rotors. The theoretical part describes the characteristics of shaped inserts for rotor casting, die casting technology, analysis of the existing technology of production of shaped inserts. The main part of the article is focused on the proposed technological process of production, comparison of existing and proposed process. The article concludes with a technical and economic benefit of the proposed solution and evaluation of the work. Rationalization of production has its justification in the development of the company and thus improve competitiveness in the market. These interventions in production offer the possibility of using new technologies that are beneficial both from an economic point of view and to improve working conditions. The article focuses on the description of the existing technology, its evaluation and subsequent processing of a new technological process.

scholarly journals Hasil Musyawarah Keagamaan Kongres Ulama Perempuan Indonesia I dalam Sudut Pandang Ekonomi

2018 ◽  
Vol 13 (1) ◽  
pp. 117
Author(s):  
Singgih Muheramtohadi
Keyword(s):  
Sexual Violence ◽  
Human Activities ◽  
Economic Problem ◽  
Economic Behavior ◽  
Point Of View ◽  
Child Marriage ◽  
Economic Factors ◽  
Economic Approach ◽  
Economic Point

<p>Economic point of view is needed to view all human activities on the effort to meet the needs or profit collection. On this paper, economic approach to view the three big issues was resulted by the conference in Indonesia’s First Female Muslim Clerics Congress in Cirebon. These three issues consist of sexual violence, child marriage, and natural damage. In these con­ferences, view these three big problems in Islamic teaching. This paper tries to view these problems in economic basic view. The three big problems not only the problem of ethic merely these about the economic problem because the economic factors play a big role in these problems. This paper will discuss the problems with the description of the result of the conference, and analyze it with an economic approach. Mostly the destroyers of the environ­ment are motivated by economic behavior. Eco­nomic behavior also plays a role in most of the child marriage cases and in many of sexual violence cases.</p>

scholarly journals INTRODUCTION AND USE OF MODERN TECHNOLOGIES IN DAIRY ANIMAL PRODUCTION

2020 ◽  
Vol 15 (1) ◽  
pp. 81-87
Author(s):  
Farit Sitdikov ◽  
Bulat Ziganshin ◽  
Radik Shaydullin ◽  
Anastasiya Moskvicheva
Keyword(s):  
Animal Husbandry ◽  
Dairy Farming ◽  
Point Of View ◽  
Technical Equipment ◽  
Cattle Breeding ◽  
Economic Point ◽  
Modern Computer ◽  
The Creation ◽  
Promising Development ◽  
Modern Technologies

The use of modern computer technology in animal husbandry without taking into account an experience can lead to unexpected results. From an economic point of view, the introduction and use of innovations in agriculture is not always justified, because of it is necessary to deal with the natural environment, and it is difficult to make predictions for obtaining particular results under such conditions. The article summarizes the experience of using modern computer technologies in dairy farming, considers approaches to improving the technology of milk production in cattle breeding, its innovative potential. Industrial-type enterprises must be modernized with the maximum use of existing facilities and technical equipment, with equipping them with advanced machines, automatic machines and equipment. The use of mechanization and automation should ensure reliable implementation and control of the processes of preparation, transportation and dosing of feed, removal and processing of manure and wastewater, and the creation of an optimal microclimate regardless of the season and climatic zone. The necessity of spreading a loose-line method of keeping cows, milking parlors and automated systems is substantiated. Cow milking should be considered a significant element in the mechanization of technological processes on a livestock farm, and therefore the most promising development of milking systems in automated and computerized installations such as Europarallel, Herringbone, and Carousel. The use of innovative digital developments such as the creation of large databases in dairy farming allows us to more accurately determine the possible results of investments and more efficiently integrate agriculture into society. The development of modern technologies contributes to a more complete realization of the genetic potential of animals and thereby increases the efficiency of dairy cattle breeding

scholarly journals Subsurface Located Geothermal Well – Case Study

2020 ◽  
Author(s):  
Clemens Langbauer ◽  
Christoph Schwarzenegger ◽  
Rudolf Konrad Fruhwirth
Keyword(s):  
Geothermal Energy ◽  
Underground Structure ◽  
Legal Framework ◽  
Point Of View ◽  
Cost Driver ◽  
Technical Equipment ◽  
Economic Point ◽  
Geothermal Well ◽  
Drilling Rig

Abstract The recovery of geothermal energy has become very attractive in the last decades. Advantages like the small footprint, the waste-free and CO2 neutral energy production and the continuous geothermal resource, will highly promote geothermal energy usage soon. This paper presents a case study of a subsurface located geothermal well. The overall approach is to use existing subsurface facilities and construct the geothermal energy recovery system within them.Currently, the generated power, produced by geothermal energy systems, is more expensive than energy produced from competitive sources, because of the costs associated with the construction of the wellbore. To extend the use of geothermal energy, its recovery costs have to be reduced. The primary wellbore cost driver is the depth. The drilling costs rise exponentially with depth. When situating a geothermal power plant in an underground structure, the temperature at the start point of such a geothermal well is already at an elevated temperature level, and the total amount of meters to be drilled is substantially reduced, thus saving drilling costs. A primary focus of this paper is, on the one hand, the amount of energy to be recovered and, on the other hand, the technical realization of such a project. The results have shown that the efficiency of subsurface located geothermal wells is higher than for surface located ones. Technical equipment and technology for drilling subsurface are already available today. A case study for investigating the influence of parameters like depth and number of wells is performed. Depending on geology, simulations have indicated that it is from the technical point of view more efficient to drill a deeper well in comparison to drill several shallow subsurface wells. Nevertheless, from the economic point of view, currently, surface drilled wells are more economical.So far, a drilling rig has never been positioned below ground, and the legal framework is just partially defined so far. This paper presents a case study of a subsurface located geothermal well positioned in existing underground infrastructure. This case study shows the vast potential but indicates the risks and limitations as well.

The e3value Ontology for Value Networks: Current State and Future Directions

2016 ◽  
Vol 30 (2) ◽  
pp. 113-133 ◽  
Author(s):  
Hans Weigand
Keyword(s):  
Business Models ◽  
Point Of View ◽  
Model Quality ◽  
Economic Point ◽  
Exchange Value ◽  
Current State ◽  
Graphical Tool ◽  
New Business ◽  
Value Modeling ◽  
The Difference

ABSTRACT Meeting changing customer demands and business opportunities in a connected world makes it necessary for organizations to constantly innovate by means of value-creating collaborations. The goal of value modeling is to support the exploration of new business models from an economic point of view. The e3value approach to value modeling is based on an explicit ontology and supported by a graphical tool. This paper provides a structured overview and evaluation of e3value, and discusses two important issues. The first issue concerns the difference between a value co-creation perspective and an exchange value perspective. It shows that with some extensions, e3value can support both. The second issue is model quality. It argues that an ontology is not complete without model quality features and, as far as e3value is concerned, proposes to use the notion of “value cycle” as a soundness feature and as a replacement of the scenario concept.

scholarly journals MODELING THE NEW FRANCHISE CREATION DECISION: THE RELEVANCE OF BEHAVIORAL REASONS

2016 ◽  
Vol 17 (5) ◽  
pp. 110-137 ◽  
Author(s):  
HELDER DE SOUZA AGUIAR ◽  
SERGI PAULI ◽  
ABRAHAM SIN OIH YU ◽  
PAULO TROMBONI DE SOUZA NASCIMENTO
Keyword(s):  
Life Cycle ◽  
A Priori ◽  
Point Of View ◽  
Decision Makers ◽  
Economic Factors ◽  
Economic Point ◽  
Operating Modes ◽  
Life Cycle Stages ◽  
Methodological Aspects ◽  
Structured Questionnaire

ABSTRACT Purpose: Franchising is one of the fastest-growing operating modes in Brazil. In 2014, the Brazilian Franchising Association reported 2,492 active brands in the country. Some theories with an economic point of view, such as the agency theory, plural forms theory, or scarcity principle, explain why companies choose franchising. However, did the decision makers and founders of these franchises decide on this strategy taking only economic reasons into consideration? The purpose of this study is to understand the a priori criteria (prior to the decision) that executives took into account when adopting this strategy and the key motivations for this decision. Originality/gap/relevance/implications: The literature emphasizes the economic reasons for the success of the franchise model, but it does not focus on the founders' motivations when they choose this strategy. This is the gap that this study seeks to address. Dissonance could arise between economic reasons and entry motivations that could result in consequences for the management of new franchises. Key methodological aspects: Ten companies of different industries and different life cycle stages involved with the franchise model were scrutinized using a semi-structured questionnaire based on the literature on decision theory and franchising. Summary of key results: Behavioral factors significantly influence decision makers when choosing the franchise model. Key considerations/conclusions: This study distinguishes the economic reasons from the executives' motivations when choosing the franchise model and highlights the importance of non-economic factors in this decision.

scholarly journals Current state and prospects of certification of Chernihiv region forest resources

2021 ◽  
Author(s):  
O. Tertychna ◽  
G. Ryabukha ◽  
N. Miroshnyk ◽  
К. Kudriashova
Keyword(s):  
Growth Rates ◽  
Forest Cover ◽  
International Markets ◽  
Forest Vegetation ◽  
Point Of View ◽  
International Standards ◽  
Forest Certification ◽  
Fuel Wood ◽  
Economic Point ◽  
Current State

The article examines the importance of the forestry complex for maintaining the natural balance and conservation of biodiversity from an ecological point of view, and compliance with international standards and access to international markets from an economic point of view. The areas covered with forest vegetation, as well as the forest cover of the territories of European countries and Ukraine were analyzed. The deviation of the actual average forest cover of the territory from the optimal one in Ukraine (by 4.1%) was revealed. Zonal indicators of Ukraine’s forest cover were considered, and the territories of the country with insufficient afforestation were identified. The importance of forest certification for ensuring economically and ecologically balanced forest management was considered. The positive dynamics according to the area of the certified forests, growth rates of the area, growth rates of the number of forestry certificates, and supply chain certificates among Ukrainian producers was analytically confirmed. Forestry activity in Chernihiv region in 2015–2020 was analyzed according to the area of certified forests, types of forest vegetation, and afforestation areas. The current FSC certified state-owned enterprises of Chernihiv region are also identified: Novhorod-Siversky Forestry, Nizhyn Forestry, Kholmy Forestry and certified products (roundwood logs), wood chips, sawdust, fuel wood, beams, planks, and finished dimensional lumber) and promising areas of certification (twigs, plank flooring, wood wool, pallets, etc.) were identified. The long-term benefit of FSC certification for domestic forests has been proved. It was determined and reasoned that forest certification is a tool to increase the competitiveness of domestic forests and integration into foreign markets.

ASSESSMENT OF CHANGES IN THE MAIN FILTRATION PARAMETERS OF PEAT IN THE PROCESS OF ITS DRAINAGE

2021 ◽  
pp. 25-31
Author(s):  
S. V. VASILENKOV ◽  
◽  
A. I. DUNAEV
Keyword(s):  
Water Loss ◽  
Calculation Method ◽  
Main Part ◽  
Research Work ◽  
Research Subject ◽  
Mathematical Basis ◽  
Method Of Calculation ◽  
Current State ◽  
Introductory Part ◽  
Design Factors

The research subject reflects one of the special conditions for the construction of reclamation systems on peatlands – this is a significant change in many of their parameters, including filtration indicators of the peat deposit – due to precipitation and compaction of peat in the process during its drainage. This research work is of a scientific and methodological nature and represents the development of a new calculation method. The ultimate aim of the research is to develop a calculation method that improves the accuracy and reliability of the existing methods for assessing the changing water-physical properties of peat due to its drainage – due to the greatest coverage and consideration of specific conditions and design factors. The introductory part describes both the current state of the issue and the relevance of the existing problem. The main part of the content contains the structure, mathematical basis and calculation formulas of the proposed method of calculation – for predicting the reduction of filtration coefficients and water loss of drained peat. A specifi c example of the calculation of the results of the practical use of the developed methodology is considered and given. The final part provides an analysis of the research results, the main conclusions and recommendations for the practical use of this technique.

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