scholarly journals The effect of different types of ageing on adhesive properties of steel cord. Salt aging

2019 ◽  
pp. 99-101
Author(s):  
O. N. Khrol
Keyword(s):  
Automotive Industry ◽  
Accelerated Aging ◽  
Operating Conditions ◽  
Dynamic Loads ◽  
Adhesive Properties ◽  
Metal Cord ◽  
The World ◽  
Different Types ◽  
Steel Cord ◽  
High Dynamic

The development of the world automotive industry is aimed at creating new, both in design and properties of tires that can operate in high dynamic loads under different operating conditions. The most probable cause of aging of automobile tires is considered in the article; one of methods of laboratory tests for the accelerated aging of system rubber-metal cord is described. The dependence of the influence of the metal cord design on the adhesion characteristics of the rubberized metal cord and its resistance to aging is also analyzed.

scholarly journals Analysis of the development of consumption and production of steel cord

2019 ◽  
pp. 48-59
Author(s):  
A. V. Vedeneev ◽  
Yu. L. Bobarikin ◽  
V. P. Zalewski
Keyword(s):  
High Strength ◽  
Unit Weight ◽  
South American ◽  
The European Union ◽  
Metal Cord ◽  
Automotive Market ◽  
Steady Growth ◽  
The World ◽  
Steel Cord ◽  
The Cost

Dynamics of development of sales of cars in the world is considered. The steady growth of car sales in the period 2013–2018 was determined. It is determined that in just nine months of 2018, 71 153 025 cars were registered in the world, which is 1.7% more than in the nine months of 2017, and according to the data of the ASEAN (European Association of car manufacturers), 11 951 957 cars were registered in the automotive market of the European Union countries in the nine months of 2018 in the EU, which is 2.5% more than in the same period of 2017. It is determined that despite some decline in production in Japan, South Korea, the rest of the traditional car manufacturers in Europe and North America show a steady pace of development, built and planned construction of new modern production of automotive equipment mainly in the Asian and South American regions. Analysis of the development of metal cord production showed that it is expected to increase investment in the production of metal cord with a planned increase in production by 22% until 2022. At the same time, the greatest growth should fall on passenger and lightcargo tires. Due to the increasing competition in the metal cord market, the development of the latter is in the direction of highstrength structures. The transition to a high-strength metal cord attracts the possibility of reducing the weight of tires, increasing their mobility and reducing the cost per unit weight of the metal cord with an equally strong replacement of structures in tires.

scholarly journals Experimental Research on the Behavior of the Rail Seat Section of Different Types of Prestressed Concrete Sleepers

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2432
Author(s):  
Aidas Jokūbaitis ◽  
Gediminas Marčiukaitis ◽  
Juozas Valivonis
Keyword(s):  
Prestressed Concrete ◽  
Common Type ◽  
Experimental Results ◽  
Dynamic Loads ◽  
The World ◽  
Different Types ◽  
Static And Dynamic Loads ◽  
Different Shapes ◽  
Heavy Loads ◽  
Prestressed Reinforcement

Nowadays, prestressed concrete sleepers are the most common type of sleepers. In different countries all over the world prestressed concrete sleepers are designed with different shapes, with different types of prestressed reinforcement and arrangements in cross-section. Additionally, different manufacturing methods and techniques are used for prestressed concrete sleepers. These railway members are stiff, durable and can withstand heavy loads. Despite that, damaged or deteriorated prestressed concrete sleepers appear on railway tracks even before the end of their service life. Therefore, there is a need for better understanding of the behavior of different types of prestressed concrete sleepers to optimize their design. The rail seat section of the sleeper is the most affected part of sleeper. Therefore, analysis of experimental results of bearing capacity, cracking, and deformation of the rail seat section of sleeper under static and dynamic loads are provided in this article. Furthermore, different types, diameters, and anchoring methods of prestressed reinforcement were analyzed in this article. Additionally, comparison of experimental results of different types of prestressed concrete sleepers is discussed.

scholarly journals ПОВЫШЕНИЕ КОРРОЗИОННОЙ СТОЙКОСТИ ДЕТАЛЕЙ КУЗОВА МИКРОАВТОБУСОВ СЕМЕЙСТВА “ГАЗЕЛЬ”

2021 ◽  
pp. 53-62
Author(s):  
G.S. Chibukhchyan
Keyword(s):  
Corrosion Resistance ◽  
Service Life ◽  
Automotive Industry ◽  
Effective Means ◽  
Operating Conditions ◽  
The Body ◽  
Rolling Stock ◽  
Corrosion Properties ◽  
Load Bearing ◽  
The World

The automotive industry makes a significant contribution to the global economic production. Its annual turnover is comparable to the sixth largest economy in the world. The automotive industry accounts for about 5% of the world Gross Domestic Product (GDP). The automotive industry has a powerful multiplier effect and stimulates the development of a number of other industries. Automotive products account for about half of the world's oil consumption, half of the rubber produced, 25% of glass and about 15% of steel. Note that the size and structure of the automotive market often act as indicators of the level of economic development, and its state quickly and accurately reflects the changes taking place in the world economy.0 The average service life of a car is up to 15-20 years, depending on many factors. The service life is significantly reduced when the car is exposed to aggressive operating conditions. Most often, the car fails due to corrosion damage (corrosion) of its parts: the body, pipelines, elements of brake systems, frames and other important components. The damage caused to humanity by corrosion is enormous. According to various sources, corrosion "eats" from 10 to 25% of the world's iron production. As a result of corrosion of the load-bearing and critical elements of the rolling stock of road transport, reliability and performance, passive safety and road safety are sharply reduced, which requires the use of new effective means and methods to increase the corrosion resistance of critical parts and components of the car. One of the effective solutions to improve the anti - corrosion properties is the application of an insulating coating on the surface of the metal, which can significantly reduce the rate of its corrosion. However, it is necessary to take into account the economic component and the complexity of the technological process. For minibuses of the “GAZEL” family operated in Yerevan, it is of particular importance to increase the corrosion resistance of parts and load-bearing elements of the body.

scholarly journals The dependence of the adhesive properties of the steel cord from the different test methods and application of various compounds

2019 ◽  
pp. 83-88
Author(s):  
O. N. Khrol
Keyword(s):  
Adhesive Strength ◽  
Test Methods ◽  
Adhesive Properties ◽  
Metal Cord ◽  
Factors Affecting ◽  
Steel Cord

One of the most important indicators of the quality of the metal cord is the strength of its adhesion to the compound, i.e. adhesive strength. This is due to the fact that the value of adhesive strength significantly affects the performance of tires.The article analyzes how the use of different test methods could determine the adhesive strength and the use of compounds of different consumers affect the amount of adhesion of the metal cord. Three methods of testing of different consumers are considered and compared, the features of each method are revealed. Tests were carried out using different methods and compounds of different consumers; the factors affecting the value of adhesive strength were determined.

Knowledge and Awareness of Dengue Fever

2018 ◽  
pp. 219-222
Author(s):  
Y. Arockia Suganthi ◽  
Chitra K. ◽  
J. Magelin Mary
Keyword(s):  
Dengue Fever ◽  
Prevention And Control ◽  
Control Measures ◽  
Infection Transmission ◽  
Standard Guideline ◽  
The World ◽  
Different Types ◽  
Prevention And Control Measures ◽  
Dengue Prevention ◽  
And Control

Dengue fever is a painful mosquito-borne infection caused by different types of virus in various localities of the world. There is no particular medicine or vaccine to treat person suffering from dengue fever. Dengue viruses are transmitted by the bite of female Aedes (Ae) mosquitoes. Dengue fever viruses are mainly transmitted by Aedes which can be active in tropical or subtropical climates. Aedes Aegypti is the key step to avoid infection transmission to save millions of people in all over the world. This paper provides a standard guideline in the planning of dengue prevention and control measures. At the same time gives the priorities including clinical management and hospitalized dengue patients have to address essentially.

Platón, Einstein y el triunfo de la imaginatividad cosmológica

1998 ◽  
pp. 87-98
Author(s):  
T. M. Robinson
Keyword(s):  
Dynamic Model ◽  
Striking Similarity ◽  
Empirical World ◽  
The World ◽  
Modern Cosmology ◽  
Different Types ◽  
Physical Objects ◽  
Changing World

This article argues the following five claims: 1. Plato’s description of the origins of cosmos in the Timaeus is not a myth, nor something unlikely: when he called it an eikos mythos or eikos logos, he meant a likely or trustworthy account on this very subject. 2. Among the details in this account, the following are prominent and surprising: a) the world was fashioned in time, in that precise point that was the beginning of time; b) several kinds of duration can be distinguished in cosmology (mainly eternity, sempiternity, perpetuity and time); and c) space is an entity characterized by movement and tension. 3. In the Statesman, Plato repeats much the same thing, adding this time the strange notion that the universe’s circular movement is periodically reversed. 4. In spite of the important differences in detail, there is a striking similarity between Plato’s account of the origins of the world and the explanation adopted by much of modern cosmology. 5. What Plato shares with so many instances of recent thought is here termed “cosmological imaginativity”. A first section of the paper deals exclusively with the Timaeus. Claims 1 and 2a are supported by a revision of the meanings of mythos and logos, followed by brief reference and discussion of the argument at Timaeus 27d, leading to the conclusion that Plato affirms that the ever-changing world has indeed had a beginning in time. Claim 2b describes five different types of duration, corresponding to Forms, the Demiurge, Space, the [empirical] world and its contents, physical objects. The second section is concerned with the myth in the Statesman, discussing it as a parallel and describing its peculiar turn to the Timaeus’ cosmology and cosmogony, a complex spheric and dynamic model. After digressing into some important ideas in modern cosmology, touching especially on affinities of some of Einstein’s ideas with of Plato’s own, the paper closes with a discussion of cosmological imaginativity, oriented to recover and recognize fully Plato’s greatness as a cosmologist.

Effective Altruism

2019 ◽  
Keyword(s):  
Animal Welfare ◽  
Poverty Alleviation ◽  
Future Generations ◽  
Global Poverty ◽  
Global Community ◽  
Helping Others ◽  
The World ◽  
Different Types ◽  
Effective Altruism

The effective altruism movement consists of a growing global community of people who organize significant parts of their lives around two key ideas, represented in its name. Altruism: If we use a significant portion of the resources in our possession—whether money, time, or talents—with a view to helping others, we can improve the world considerably. Effectiveness: When we do put such resources to altruistic use, it is crucial to focus on how much good this or that intervention is reasonably expected to do per unit of resource expended (for example, per dollar donated). While global poverty is a widely used case study in introducing and motivating effective altruism, if the ultimate aim is to do the most good one can with the resources expended, it is far from obvious that global poverty alleviation is highest priority cause area. In addition to ranking possible poverty-alleviation interventions against one another, we can also try to rank interventions aimed at very different types of outcome against one another. This includes, for example, interventions focusing on animal welfare or future generations. The scale and organization of the effective altruism movement encourage careful dialogue on questions that have perhaps long been there, throwing them into new and sharper relief, and giving rise to previously unnoticed questions. In the present volume, the first of its kind, a group of internationally recognized philosophers, economists, and political theorists contribute in-depth explorations of issues that arise once one takes seriously the twin ideas of altruistic commitment and effectiveness.

Comprehensive Effects of Short-Term Rental Platforms Across Hotel Types in U.S. and International Destinations

2021 ◽  
pp. 193896552110335
Author(s):  
John W. O’Neill ◽  
Jihwan Yeon
Keyword(s):  
Service Providers ◽  
Comprehensive Analysis ◽  
Competitive Market ◽  
Substitution Effects ◽  
Short Term ◽  
Hotel Performance ◽  
The World ◽  
Different Types ◽  
Location Type ◽  
The Impact

In recent years, short-term rental platforms in the lodging sector, including Airbnb, VRBO, and HomeAway, have received extensive attention and emerged as potentially alternative suppliers of services traditionally provided by established commercial accommodation providers, that is, hotels. Short-term rentals have dramatically increased the available supply of rooms for visitors to multiple international destinations, potentially siphoning demand away from hotels to short-term rental businesses. In a competitive market, an increase in supply with constant demand would negatively influence incumbent service providers. In this article, we examine the substitution effects of short-term rental supply on hotel performance in different cities around the world. Specifically, we comprehensively investigate the substitution effects of short-term rental supply on hotel performance based on hotel class, location type, and region. Furthermore, we segment the short-term rental supply based on its types of accommodations, that is, shared rooms, private rooms, and entire homes, and both examine and quantify the differential effects of these types of short-term rentals on different types of hotels. This study offers a comprehensive analysis regarding the impact of multiple short-term rental platforms on hotel performance and offers both conceptual and practical insights regarding the nature and extent of the effects that were identified.

scholarly journals Withdrawal Properties of Self-Tapping Screws in Japanese larch (Larix kaempferi (Lamb.) Carr.) Cross Laminated Timber

Forests ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 524
Author(s):  
Junhua Xu ◽  
Shuangbao Zhang ◽  
Guofang Wu ◽  
Yingchun Gong ◽  
Haiqing Ren
Keyword(s):  
Regression Model ◽  
Engineering Design ◽  
Wood Species ◽  
Japanese Larch ◽  
Effective Length ◽  
Larix Kaempferi ◽  
Cross Laminated Timber ◽  
The World ◽  
Different Types ◽  
Length Increment

With the increasing popularity of cross-laminated timber (CLT) constructions around the world, there have been attempts to produce CLT using local wood species in different countries, such as Japanese larch (Larix kaempferi (Lamb.) Carr.) in China. Thus, the need to investigate the connection performance also increases to support the design and construction of CLT buildings using local wood species. In this study, the withdrawal properties of three different types of self-tapping screws (STS), with a diameter of 6 mm, 8 mm, and 11 mm, were tested with Japanese larch CLT. The results revealed that the withdrawal strength of STS increased with increasing density and effective length, but decreased with an increasing diameter. With a density increment of 0.05 g/cm3, the withdrawal strength increased by an average of 9.4%. With an effective length increment of 24 mm, the withdrawal strength increased by an average of 1.4%. An empirical regression model was adopted to predict the withdrawal strength of Japanese larch CLT based on the results, which can be used for potential engineering design of CLT connections using STS.

scholarly journals The Effects of Urban Natural Environments on Preference and Self-Reported Psychological Restoration of the Elderly

2021 ◽  
Vol 18 (2) ◽  
pp. 509
Author(s):  
Ling Qiu ◽  
Qujing Chen ◽  
Tian Gao
Keyword(s):  
Green Space ◽  
Environmental Design ◽  
The Elderly ◽  
Urban Environments ◽  
Green Spaces ◽  
Photo Elicitation ◽  
Natural Environments ◽  
The World ◽  
Different Types ◽  
Aging Populations

The world is facing the challenge of aging populations. Urban natural environments, including green spaces and blue spaces, have been demonstrated to have great benefits to the mental restoration of the elderly. However, the study of the specific characteristics of urban environments that are popular and the most restorative for the elderly is still lacking. Photo elicitation as visual stimuli was utilized to explore the differences in preference and psychological restoration of the elderly through the perception of the eight perceived sensory dimensions (PSDs) in different types of urban environments. The results showed that: (1) The respondents had different perceptions of the eight PSDs in the different urban natural environments. Blue space and partly-closed green space were more preferred by the elderly, and also had more psychological restorative effects on the elderly. (2) There was no significant correlation between the number of highly perceived PSDs and preference, as well as between the number of highly perceived PSDs and psychological restoration. However, there was a significant correlation between preference and psychological restoration. (3) Partly-closed green space with more Serene and Refuge qualities, and blue space with more Serene, Refuge and Prospect properties were optimal characteristics for psychological restoration of the elderly. In addition, open green space with more Prospect, Serene and Social qualities, and closed green space with more Space, Refuge and less Nature properties could also increase psychological restoration of older adults. These findings can provide useful guidelines for restorative environmental design for the elderly in the future.

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