Edgar Sokolovskij

Vilnius Gediminas Technical University · Faculty of Transport Engineering

The aim of the article is to analyse the relationship between company growth, measured as an increase in Earnings Per Share (EPS) in 3- and 5-year periods, and companies’ financial condition, measured using the Altman z-Score (AS) model. The study was carried out on the example of companies included in the WIG Index and Warsaw Stock Exchange Index...

The removal of particulate matter (PM) from air streams is essential for advancing environmental technologies and safeguarding public health. This study explores the performance of an electrostatic precipitator (ESP) in eliminating fine and ultra-fine PM under varied experimental conditions. It uniquely examines the influence of PM size and feed ra...

The paper highlights the importance and validity of the research problem: the major consequence for logistics arising from China’s logistics market due to its effective short-term and long-term strategies and developing transportation wholesale. The presented viewpoint helps to clearly understand the international perspective of the vastly enlargin...

The effective operation of high-speed tracked vehicles in a combat vehicle configuration depends primarily on the correct identification of the expected operating conditions, already in the design or modernisation phase. This applies to both terrain, meteorological and climatic conditions. This approach considers the most unfavourable driving condi...

Alongside various road safety aspects, vehicle dynamics play a crucial role in enhancing the quality of life in modern society within a holistic traffic safety framework [...]

Today, green transport is a growing trend in terms of transport costs, CO2 emissions and satisfaction with logistics services. Green logistics is an environmentally friendly and sustainable logistics system that encompasses activities affecting logistics functions and processes, promoting the environment and the development of a circular economy. R...

The COVID-19 pandemic has caused major disruptions in global supply chains with unforeseen and unpredictable consequences. However, the pandemic was not the only reason why supply chain risk management has become more crucial than ever before. In the last decade, the occurrence of previously merely theoretical risks has emphasised the importance of...

The transportation of bulk or liquid cargo is crucial for ensuring the delivery of such cargo to areas lacking well-established infrastructure or favorable natural conditions. These areas may lack sufficient rail or air transport accessibility, or may not have suitable embankments along rivers, lakes or seas with appropriate loading and unloading f...

Proper supply chain management helps to ensure business continuity considering the increased importance of globalization. Logistics processes play an important role in keeping the supply chain running smoothly, and warehouse management is one of the most important logistics activities. The movement of freight flows in the supply chain poses many ch...

When transporting different types of cargo, the factors affecting the cargo must be assessed to ensure a safe and fast transportation process. However, the specificity of the cargo means that the standard assessment methods do not reflect the existing conditions or are standard at the theoretical and/or recommendation level. Therefore, in the event...

The increasing number of electric vehicles is forcing new solutions in the field of charging infrastructure. One such solution is photovoltaic carports, which have a double task. Firstly, they enable the generation of electricity to charge vehicles, and secondly, they protect the vehicle against the excessive heating of its interior. This article p...

The motivation for this study was the need to extend and supplement the previously conducted research on technical objects in the renewable energy sector with analyses of the environmental impact of the production, operation and post-operational development stages of the wind power plant. The main purpose of the work was to investigate, analyze and...

This article examines a simulated collision between a car and a cyclist, assessing the trajectory of the cyclist’s movement after the impact, namely the throwing distances and angles of the cyclist and bicycle. Information about the car and cyclist models used for the study is provided. Special software PC CRASH 8.1 for the analysis and reconstruct...

Vehicle bodies and structures should be designed to absorb and redistribute as much impact energy as possible, thus protecting the driver and passengers from injury. The deformation zone of the vehicle in the case of a side impact is smaller than in the case of a front impact. A side impact collision directly affects the structure of the vehicle. C...

Buses are one of the most popular types of vehicles that allow people to travel. Innovative materials (such as glass or carbon fiber) can be used in the construction to reduce the weight of the bus, which is directly related to the running costs, environmental protection and safety. Carbon or fiberglass composites have long been used in the passeng...

In the paper, the reliability of a spatial tubular structure of a bus safety frame formed of different steel profiles is discussed. A methodology for the bus safety structure modeling is presented herein by applying numerical methods that enable us to simulate virtually a test for assessing bus rollover crashworthiness according to the United Natio...

Energy consumption and the emission of harmful particles have increased significantly in recent decades. The constant development of transport poses an increasing threat to the environment. The search for alternative energy-saving solutions is closely linked to the development and improvement of new vehicles, reducing their negative impact on the e...

The objective of the study is to determine whether the scientific literature in the field of heavy truck maintenance parallels current development trends in maintenance. For this purpose, models related to fleet maintenance were analysed in terms of cost optimization, decision-making support and improving employees’ maintenance competencies. The an...

The strength and stiffness of the frame is one of the key indicators of vehicle structures. Insufficient stiffness causes vibration and noise, and is also less comfortable for both the passengers and the driver. Symmetry is required between the strength and comfort of the structural frame, which depends on vibration and noise. This article analyses...

Since the implementation of modern approaches in operation maintenance, drivers are expected to be integrated into the entire system of maintenance in order to take over the professional competencies of maintenance workers. For this purpose, an international study was conducted on a sample of 249 truck drivers, with the aim to determine how mainten...

The goal of the study is to develop a model that focuses on managing logistics costs at all stages of a product’s life cycle. The model includes several different cost components and provides a wider coverage of individual processes, as logistics costs are present in different areas of a company’s operations. The applicability of the proposed metho...

In this paper the relation between semi-active suspension characteristics and vertical oscillations of the vehicle body on road roughness is analysed. During experimental tests, the damping of semi-active suspension was changed while measuring vehicle's sprung and unsprung mass vertical accelerations, pitch rate, which were transformed into a frequ...

To achieve the overall goal of realising an efficient and advantageous participation of autonomous ground vehicles in the transport system as fast as possible, a lot of work is being done in different and specific research fields. One of the most important research fields, which has a large impact on safe autonomous ground vehicle realisation, is t...

In this article passenger car suspensions are analyzed, depending on the type of shock absorber. Introduced typical suspension components and semi-active suspension control called “Skyhook”. An overview of the literature is provided also presented the research of passive and semi-active suspension. A quarter-car model simulation has been performed...

Due to global purposes to ensure growth of a competitive and sustainable transport system, also to solve traffic safety and environmental problems, various engineering solutions are being sought out. It can be assumed that autonomous vehicles are the technology, which will ensure the positive change in the transport system. Even though many studies...

In this paper, the relation of the velocity of a vehicle in the slip mode to the parameters of the tire marks on the road surface is examined. During traffic accident reconstructions , the initial velocity of a sideslipping vehicle is established according to the tire mark trajectory radius, and calculations highly depend on the directly measured p...

The results of research on the impact of adding a hydrogen-containing gas obtained by water electrolysis to the air charge of a gasoline engine on the combustion process, the indicator values of the work process, fuel-consumption efficiency and environmental performance of the engine are provided in the paper. The indicator tests of the work proces...

With the technologies of the autonomous vehicles improving, one of the biggest tasks is safe and effective integration of the autonomous vehicles into the transport system. The safety of such vehicles depends on their ability to move stably and accurately in the desired trajectory. The intellectual control algorithm is the most important system, co...

The objective of this paper is to demonstrate the usefulness and reliability of modern warehouse technology for suppliers in the automotive industry and to identify the potential causes preventing it from being used more in practice. In recent years, we have seen great progress made in the development of modern warehouse solutions, as well as a dra...

In the paper, the structures of frames and the methods for calculation of their resistance are reviewed. A frame of a basic minibus and a frame of a low floor minibus are examined and analyzed herein. Computer-aided modeling of the frames are carried out. The structures of the frames are assessed while simulating their deformations caused both by f...

In this work, methods of estimation of road roughness by processing data of laser sensors of distance measurement are investigated. Depending on the layout of the sensors and the processing of the data, the Japanese, symmetrical and asymmetrical roughness estimation methods are elaborated in this work. The experimental research that was carried out...

At vehicles technical inspection stations, the braking system of a load-carrying vehicle is tested when the vehicle is free of any load; however, such tests do not reflect the operation of the brakes in loaded vehicles. In the Paper, methods for testing the braking system of a load-carrying vehicle are discussed upon; other scientific papers relate...

This paper deals with the problem of a vehicle speed prediction from tire yaw marks. In forensic science, the evidences from accident scene in most cases are the main information preparing the accident report. Analysis of tire yaw marks when vehicle speed is too great to maintain the proposed circular path is the main object of this paper. Errors c...

Nearly 1.3 million people die in road crashes each year, on average 3,287 deaths a day. In 2013 in the European Union more than 6 % of all who died in road traffic crashes were cyclists. The number of cyclist killed on roads in the EU has decreased by only 9 %, compared to the total fatality decrease of 18 % from 2010 to 2013. The majority of cycli...

The paper presents Vehicular Ad Hoc Network (VANET) system based on an analysis of the movement of a motorcade in an emergency situation. This analysis seeks to answer the question: when and under what conditions Emergency Message (EM) sent by Vehicle-to-Vehicle (V2V) system reaches the final target to help in preventing of serious accidents, such...

The paper analyses the impact of the road micro-profile on the duration and the type of the vehicle wheel contact with the road surface driving at different speed. The selected vehicle bicycle model describes vertical displacements of front and rear wheels and their suspension as well as the impact of the vehicle body motion and longitudinal oscill...

The paper analyses the effect of road roughness on the variation of the vertical oscillations’ frequency of the sprung and unsprung masses of a vehicle driving at varying speed. The research aims to determine the regularity with which the wheel of a vehicle moving at varying speed reproduces the roughness of road pavement texture. The theory of mat...

The paper presents the methodology for expert investigation of traffic accidents involving running over pedestrians. This methodology is aimed at determining the availability of any technical possibility for a motor vehicle driver, driving at a particular speed, to avoid hitting the pedestrian in a particular situation. Furthermore, the paper prese...

Hydrogen could become an important element, allowing us to accumulate and transfer energy in a clean way. Hydrogen can be used in cars as a fuel additive which increases the combustion efficiency of the fuel-air mixture. A small amount of hydrogen gas could also be produced in a car by decomposing water by means of electrolysis, using for this purp...

In this paper, the parameters important for lateral dynamics of vehicles are analyzed in order to establish the values of its critical speed on the moment of losing the stability. The values of the vehicle’s speed yaw rate, the steering wheel angle, the lateral acceleration, and the roll angle obtained from experimental tests are filtered according...

The article analyzes the movement of the car on the curve on the slippery and snowy road surface with asphalted ruts. The paper reviews literature related to lateral and longitudinal vehicle acceleration and dynamics of vehicle movement. The experimental facts of vehicle lateral acceleration are given in graphical charts. The article also describes...

This paper presents the main traffic control elements, which were classified into groups. One group presents traffic control elements, which have different effects on accidents: reduce the number of accidents, do not have statistically significant effect on the number of accidents and those which appear to lead to an increased number of accidents....

Movement of the vehicle when its certain wheels have lost contact with the surface of the road or cannot be held up through other reasons is considered in the present article. The vehicle deceleration and speed which is equivalent to the corresponding length of the braking trace of the wheels when all wheels of the vehicle are being held up and whe...

Traffic safety may be ensured by normal operation of all elements of the system, including the driver, a motor vehicle and transportation medium. Insufficient safety of some particular elements of this system (the lack of discipline of the participants of traffic, poor technical state of a motor vehicle or road, etc.) are the main causes of traffic...

The article examines various types of car maneuvers, their usage possibility under miscellaneous situations. During critical situation car maneuvering is compared with braking in term of avoiding car accident. It is also used to avoid suddenly one the road appeared movable or non-movable obstacle. Schemes explain each segment during maneuvering pro...

The article provides a closer look into the quality properties of fuels, analyses the merits and demerits of using biocomponents in petrol and diesel and overviews the ways of improving the quality of fuels. Work carried out by the authors covers the determination of the basic quality properties (density, kinematic viscosity and flash point) of pet...

RelStat'08, 15-18 October 2008, Riga, Latvia Statistical data of registered traffic accidents in Lithuania is presented. The specific traffic accident investigated using the mathematical model of transport and pedestrian traffic restricting gate which is designed and briefly presented in paper. There are two sections of the gate: first section rest...

The theoretical model of motor vehicle movement and rollover is presented. This model consists of three models: model of the motor vehicle; model of the road pavement surface; model of the interaction between the motor vehicle's wheel and the road pavement surface. The computer-run simulation of rollover of the motor vehicle with the help of the PC...

The present article depicts the results of the investigation into automobile braking parameters and traction characteristics on the different road surfaces. The results of the investigation into automobile braking (the automobile deceleration and coefficient of traction), while braking in winter conditions, i.e. on ice and snow, are presented. The...

The present article depicts the results of the investigation into automobile braking parameters and traction characteristics on the different road surfaces. The results of the investigation into automobile braking (the automobile deceleration and coefficient of traction), while braking in winter conditions, i. e. on ice and snow, are presented. The...

Aim of the research: to define the consistent patterns of impacts exercised by oscillation of the motor vehicle in emergency braking on it movement mode and on the braking distance; to analyse processes of oscillation formation. To extend, with the aid of the developed models, the expert opportunities for modelling the motor vehicle movement, for i...

Impact of the automobile wheels on the road border, as a result of which the wheel tire gets dismantled, is considered in the article. The required force and the minimal speed of driving, which is equivalent to the expenditures of the kinetic energy, necessary for dismantling the tire from the wheel rim after impact on the road border, are ascertai...

The present paper describes the results of an investigation into the braking parameters of automobiles equipped with an antilock brake system (ABS) and without an ABS. The values of the automobile deceleration, the time of the deceleration increase and the time of disbraking, while braking on a dry asphalt-concrete surface, which has been fixed in...

The article deals with investigation of the possibilities of the program PC CRASH, meant for the computer modeling of the movement of vehicles. The computer modeling of the process of overturning of the automobile with the help of the program PC CRASH is introduced. The cross profile of the road, the height of the centre of gravity of the automobil...

The article deals with investigation of the possibilities of the program PC CRASH, meant for the computer modeling of the movement of vehicles. The computer modeling of the process of overturning of the automobile with the help of the program PC CRASH is introduced. The cross profile of the road, the height of the centre of gravity of the automobil...

The article deals with investigation of the possibilities of the program PC CRASH, meant for the computer modelling of the movement of vehicles. The computer modelling of the process of overturning of the automobile with the help of the program PC CRASH is introduced. The cross profile of the road, the height of the centre of gravity of the automob...

The graphic analytical modelling and the computer modelling of collisions of the automobiles are compared in this article. The examples of modelling of collisions of the automobiles are given. The computer modelling of collision of the automobiles with the help of the program PC CRASH is introduced. The possibilities and advantages of this computer...

The graphic analytical modelling and the computer modelling of collisions of the automobiles are compared in this article. The examples of modelling of collisions of the automobiles are given. The computer modelling of collision of the automobiles with the help of the program PC CRASH is introduced. The possibilities and advantages of this computer...

Movement of the vehicle when its certain wheels have lost contact with the surface of the road or cannot be held up through other reasons is considered in the present article. The vehicle deceleration and speed which is equivalent to the corresponding length of the braking trace of the wheels when all wheels of the vehicle are being held up and whe...

"The 20th anniversary of the department of transport technological equipment of the Vilnius Gediminas technical university" Transport, 11(1), p. 1-8 First published online: 27 Oct 2010

The history of the Department of Transport Technological Equipment of the Vilnius Gediminas Technical University is presented. Research areas and transport engineering scientific problems which are worked out by the scientists of department are mentioned.

The present article depicts the results of the investigation of braking parameters of the automobiles, equipped with ABS and without ABS. The values of the automobile deceleration, increase of the deceleration time and the time of disbraking, while braking on dry asphalt-concrete surface, which was fixed in the course of the experimental investigat...

Collision of automobile wheels with a vertical obstacle as a result of which the wheel tire gets dismantled is considered in the present article. The required force and the minimal speed of driving which is equivalent to the expenditures of the kinetic energy necessary for dismantling of the tire from the wheel rim after the collision with an obsta...

Collision of automobile wheels with a vertical obstacle as a result of which the wheel tire gets dismantled is considered in the present article. The required force and the minimal speed of driving which is equivalent to the expenditures of the kinetic energy necessary for dismantling of the tire from the wheel rim after the collision with an obsta...

The present article depicts the results of investigation of the braking parameters of automobiles equipped with ABS and without ABS. The values of the automobile deceleration, the increase of the deceleration time and the time of disbraking while braking on a dry asphalt‐concrete surface which was fixed in the course of the experimental investigati...

The present article depicts the results of investigation of the braking parameters of automobiles equipped with ABS and without ABS. The values of the automobile deceleration, the increase of the deceleration time and the time of disbraking while braking on a dry asphalt-concrete surface which was fixed in the course of the experimental investigati...

The article provides a closer look into the quality properties of fuels, analyses the merits and demerits of using biocomponents in petrol and diesel and overviews the ways of improving the quality of fuels. The work carried out by the authors covers the determination of the basic quality properties (density, kinematic viscosity and flash point) in...