bluuebunny/crossref_metadata_2025_split huggingface dataset:
Implementing an ETL-driven Data Integration Framework for State Universities and Colleges
Authors: Soriano Lorna T. , Dela Cruz Josephine S. 
Published: May 2020

Abstract
State Universities and Colleges collect enormous volumes of data scattered across multiple disparate transactional systems. Integration of these data is therefore vital in order to eliminate problems in consolidating and interpreting such data. This paper aimed to develop and implement a data integration framework that employs an ETL-driven data warehousing technique for State Universities and Colleges (SUCs). Moreover, the framework was implemented and tested using heterogeneous data of the Bicol State College of Applied Sciences and Technology (BISCAST), one of the state colleges in Region 5, Philippines. Consequently, the integration framework has been found to be effective in streamlining the process of consolidating and interpreting SUC’s data thus enabling the organization to produce reliable reports and eventually can cope with submission deadlines. A reporting tool was also developed for end-users to generate and view the outcome of the integration process. Furthermore, the level of the system’s usability was determined. Based on the result, it is effective in accomplishing specific tasks, highly efficient and commendable to adopt.
e-LAHOK: An e-Participatory Platform for Disaster Risk Reduction and Management
Authors: Llovido Jennifer L , Palaoag Thelma D 
Published: May 2020

Abstract
The study aimed to design, develop and determine the extent of user acceptability of e-LAHOK (Legazpi Alisto at Handang magbigay ng Opinyon para sa Kaligtasan), an electronic and participatory Disaster Risk Reduction and Management Platform for the City of Legazpi that fosters civic engagement and open participatory governance by soliciting Disaster Risk Reduction (DRR) strategies and incident reports from the local populations. An integrated Design Thinking (DT) and Extreme Programming (XP) framework (DT@XP) was utilized in the design and development of e-LAHOK whereas, a user’s evaluation based on ISO 9126 software quality metrics was conducted to determine the extent of user acceptability. Significant findings showed that e-LAHOK facilitated orderly solicitation and submission of DRR strategies and incident reports from the local populations by allowing the creation, management, consolidation, analysis and visualization of survey responses as well as submission, verification and acceptance of submitted incident reports for analysis. These results could serve as basis to concerned agencies in the development and implementation of DRR plans and policies to ensure preparedness and effective response by the barangays and its citizens in the event of a disaster. Further, evaluation results show that the system was rated highly acceptable in terms of functionality and usability. This concluded that the features of e-LAHOK provided an organized way of gathering inputs from the local communities of Legazpi City, fostering civic engagement and open, participatory governance. Thus, utilization of the proposed system is recommended.
Method of torque distribution between the axles and the wheels of the rear axle to improve the manageability of two-axle all-wheel drive vehicles
Authors: Zhileykin M , Eranosyan A 
Published: May 2020

Abstract
Currently, manufacturers of modern cars are constantly increasing the level of control over the parameters of the movement of wheeled vehicles, achieving the maximum level of stability and control. The use of various all-wheel drive systems is becoming increasingly relevant and expedient. The distribution of traction force on all wheels allows you to use the entire weight of the car as a coupling, which has a positive effect on the dynamic qualities of the car, terrain, and allows you to implement control algorithms that improve the handling and directional stability of the car. The aim of the work is to substantiate the methods of controlling the curvilinear motion of two-axle vehicles with various transmission patterns that provide for improving their controllability. A method for improving the controllability of four-wheel drive two-axle vehicles with the transmission of torque to the front axle and the distribution of torque between the wheels of the rear axle is proposed. The effectiveness and efficiency of the proposed method are proved by the methods of simulation of motion of two-axle 4x4 vehicles with a connected front axle and redistribution of torque between the wheels of the rear axle.
The stress-strain state and optimization of the cross section of the wheel rim tubeless truck tire
Authors: Balabin I , Lyamin M , Chabunin I , Ryazantsev V 
Published: May 2020

Abstract
This article is devoted to the issues of strength and reliability of the wheel, as well as minimizing its weight, which allows to improve traction and brake dynamics, smooth running, fuel efficiency, etc. The solution of the problem of determining the stress-strain state of the automobile wheel with fifteen-degree landing shelves is presented. In the article it is offered to equalize the stresses arising at internal and external surfaces of a rim of a variable thickness, at the expense of variation of thickness of a rim of a car wheel in various zones.
Simulation model of a transport vehicle with a fixed-ratio transmission and a flywheel energy storage in case of random external action
Authors: Korsunskiy V 
Published: May 2020

Abstract
The purpose of this study is to evaluate the dynamic qualities and efficiency of a heavy-duty transport vehicle equipped with a mechanical transmission, using a combined power plant (CPP) with a flywheel energy storage (FES), establish an acceptable level of power reduction of the main internal combustion engine (ICE), determine the range of installed power of the FES drive and its average value of efficiency, as well as the calculation of the level of required energy capacity of the flywheel when driving in various types of terrain. A universal technique for simulating statistical modeling of external disturbances acting on the transport vehicle has been developed. Using the developed methodology, the vehicles’ characteristics have been compared according to the criterion of average speed and an assessment of the efficiency of the use of CPP has been carried out. The results obtained allow us to carry out a comparative analysis of vehicles equipped with a conventional or combined power plant with a random external action of the road, as well as optimize their parameters.
Scenario-based definition of technical safety requirements for autonomous road vehicles
Authors: Kirovsky O , Byakov K 
Published: May 2020

Abstract
The article provides a brief overview of the standards ISO 26262 and ISO 21448 and the safety life cycle defined therein. A method for technical requirements development based on road situation statistics is proposed. Possibilities for improvement of safety life cycle for autonomous vehicles using traffic data are considered. An outlook towards the implementation of traffic scenarios into the safety lifecycle is briefly described.
Verification of mathematical model in curvilinear motion of the car with AWD system
Authors: Ankinovich G , Verzhbitsky A , Antonyan A 
Published: May 2020

Abstract
In the vehicles development also developed a variety of control systems. However, in their development it is necessary to have a mathematical model of the control object, that is, the vehicle model for the study of electronic control systems. Mathematical modeling is the most effective and promising method of studying the control object behavior. It is possible to carry out vehicle mathematical modeling and its components with sufficient high accuracy and compliance with its real prototype. But there are cases that it is not possible to simulate in detail some phenomena of the control object. In order to verify the accuracy of the compiled model, model verification of the developed vehicle is carried out. The basis used the KIA Sorento. It has AWD based on front wheel drive. This vehicle, equipped with measuring and recording devices, which carried out on the roads of the testing ground (FSUE “NAMI”). The work focuses on modelling the simulation of transmission units in the vehicle. The systems of equations of the engine, gearbox, transfer case, main gears and elastic drive shafts are written. Races on curvilinear trajectories were carried out. It also presents results comparison of the real vehicle movement and the results carried out from modeling in MATLAB&Simulink. The accuracy of the developed mathematical model and admissibility in further application in the development of control systems are proved.
Mathematical model of air suspension with internal throttling of working fluid
Authors: Chernyshov K , Novikov V , Pozdeev A , Ryabov I , Diakov A , Evseev K , Chumakov D 
Published: May 2020

Abstract
The article describes a mathematical model of a two-mass vibrating system with an air suspension consisting of a two-chamber air compressor, the working and auxiliary chambers of which are connected to each other through an air throttle. The results of the research have been used to construct the amplitude-frequency characteristics of vertical displacements and accelerations of the suspended mass, and conclusions have been drawn.
Results of theoretical and experimental research of pneumatic suspension with internal throttling of working fluid
Authors: Chernyshov K , Novikov V , Pozdeev A , Ryabov I , Diakov A , Evseev K , Chumakov D 
Published: May 2020

Abstract
The article presents the mathematical model and experimental device of the air suspension installed on the dynamic stand, which imitates the work of the unsupported vehicle suspension. The air suspension is presented in the form of a two-chamber air compressor, the working and auxiliary cavities of which are communicated to each other through a throttle with a check valve open during compression. The design and experimental amplitude-frequency characteristics of scales of vertical movements of the suspended mass are presented.
Calculated and experimental tests of dynamic vibration isolators for use in the suspension system of the traction vehicle cabin
Authors: Shekhovtsov V , Lyashenko M , Potapov P , Diakov A , Evseev K 
Published: May 2020

AbstractThe article gives a brief description of operational vibration effects on the tractor cab, protective qualities of standard rubber monoblock vibration isolators used in the systems of cabin suspension of domestic tracked tractors. The principle of operation and advantages of dynamic vibration dampers are described. The description of methods and results of calculation and experimental studies of vibration insulating properties of standard and dynamic vibration isolators is given.
Analysis of the cornering stiffness uncertainty impact on the steering sensitivity of a two-axle automobile
Authors: Gorelov V , Komissarov A , Vozmishcheva I 
Published: May 2020

Abstract
In order to provide a reliable estimate of the steering sensitivity at the early design stage it is necessary to know the impact of the ucertainty of the main parameters affecting this characteristic. These parameters include the tire cornering characteristics featuring a large degree of uncertainty. The objective of the research was to find the impact of the tire cornering characteristics variation on the steering sensitivity. The analysis was performed in a multi-body simulation program with the use of a spatial non-linear model of the automobile motion. The model takes into account the detailed kinematics of the suspension and steering linkages. Interaction of the tires with the road is described by an original semi-empirical model providing indepentent calibration of the tire longitudinal and lateral force characteristics in the contact patch. The reseach has demonstrated the degree of importance of considering the tire cornering stiffness variation during the steering sensitivity analysis.
Research of dynamics of movement of grain and forage harvesters by methods of mathematical and imitating modeling
Authors: Zhileykin M , Sirotin P 
Published: May 2020

Abstract
The mathematical model of movement of the grain and forage harvester is considered, the possibility of its algorithmization in the software complex is shown, as well as the data confirming its adequacy. The mathematical model includes dynamic and kinematic equations of relation of angular and linear velocities with angular and spatial coordinates. The peculiarity of the model is in the use of a set of coordinate systems, which allowed to take into account not only the weight and size and layout features of the type of machines under study, but also the nature of interaction of the elastic wheel with the damped base. In the given model the speed of movement of the combine is set not by the forced change of the coordinate of the center of mass of the skeleton, but is formed by the modeling of the process of interaction of driving wheels with the support base. This approach provides a more adequate description of the process of curvilinear movement of the combine, allows you to simulate the movement of the machine, acceleration, braking, overcoming obstacles, slipping and slipping processes, taking into account the characteristics of the tire and traction properties of the soil. The approach adopted ensures sufficient accuracy of the model with a minimum set of factors and requirements for calculation. Experimental and computational data obtained as a result of simulation are presented. Comparison of active forces and acceleration spectral densities in the main parts of the combine showed sufficient convergence of results. The revealed inaccuracy is caused by the discrepancy between the numerical description of the supporting surface and the test road, the presentation of the combine’s frame as an absolutely rigid body, and differences in the elastic-viscous properties of tires. Conclusions are made and directions of the further researches providing improvement of operational properties of self-propelled combines at the expense of systems of suspension of wheels and working elements are defined.
Automatization of calculation of dynamic characteristics of the car suspension system
Authors: Lahtyukhov M , Zheglov L 
Published: May 2020

Abstract
The article deals with the questions of finding the parameters of generalized coordinates for plane linear dynamic systems of any structure with degrees of freedom, used in the study of suspension systems. The appropriateness of separation of a number of subsystems for each of which potential energy and dissipative function are calculated by the same type equations is shown. As an example, the differential equations describing in the general case the linear movements of the masses of the dynamic system are given. It is shown that in order to find the parameters of generalized coordinates of a flat linear dynamic system with degrees of freedom at the kinematic harmonic disturbance determined by the structure of the road surface, a solution of the system of linear algebraic equations is required.
One of the approaches for the analytical description of the interaction of an elastic wheel with a solid surface
Authors: Popov S 
Published: May 2020

Abstract
The design of branched transmissions of multi-axle vehicles, multistage steering systems and automated workflow control systems requires their preliminary dynamic calculation. These calculations are based on mathematical models of structural elements corresponding to the modern level of development of system theory, i.e. taking into account dynamic interrelations between the system links. The aim of the work is to build a mathematical model of the automobile wheeled propulsor intended for use in the dynamic model of the “car-road” system or models of separate automobile systems. The approach to mathematical modeling of the automobile wheeled propulsor is offered, consisting in its description by methods of the control theory as an element of dynamic system. The method of construction and analysis of the complete system of equations of kinematic bonds superimposed in the contact zone on the movement of points of the external surface of the tire of linear elastic wheel at its perturbed rectilinear rolling on a solid uneven support surface is developed. The method of construction of a transfer matrix of automobile linear elastic wheel at which its structure practically does not depend on features of the settlement scheme of the tyres is developed too in this study. The method of obtaining the tire characteristics necessary for the calculation of the transfer matrix elements by the generalized method of successive approximations, which gives the qualitatively correct results in zero approximation, is proposed. The method of qualitative theoretical analysis of the features of rectilinear stationary rolling of the automobile wheel is given in this paper. The results allow to carry out researches and calculations of dynamic characteristics of automobile systems, units and assemblies directly interacting with the wheel; they can serve as a basis for further improvement of mathematical models of automobile ruts by methods of system theory.
Perspectives of increasing smooth ride of wheeled vehicles without suspension with pneumatic damping system
Authors: Pozdeev A , Ryabov I , Novikov V , Zhdamirova E , Diakov A , Evseev K 
Published: May 2020

Abstract
In the article the analysis of a modern research condition in the field of increase of smoothness of a course of wheeled vehicles without suspension with pneumatic damping system is resulted. The reasons limiting the solution of a global problem of the further development of wheeled vehicles without suspension and growth of productivity and safety of work at performance by them of transport, agricultural and road-building works are formulated. The basic ways of the decision of the given problem solution, consisting in increase of damping properties of pneumatic tyres for wheeled non-suspended vehicles without increase in resistance to rolling of wheels and decrease in a resource of tyres are analyzed. Thus development of essentially new innovative structures of wheels, improving smoothness of a course and other operation al properties of non-suspended vehicles is offered.
Formation of the law of steering angle control to maintain a trajectory of the vehicle movement
Authors: Levenkov Y , Chichekin I , Vol’skaya N 
Published: May 2020

Abstract
The object of the study is a control system for changing and maintaining the trajectory of the vehicle. Methods of maintaining a trajectory of the vehicle are the subject of research. Multi-body dynamics (MBD) methods are used to solve this problem. The purpose of the study is development of management model change the trajectory of the vehicle. On the example of a two-axle four-wheel drive truck, a mathematical model of the vehicle includes subsystems-transmission, springing system and steering. The study of the influence of the transmission and suspension to change the trajectory of the car is not considered. The paper deals with the formation of the steering angle control law to maintain a given trajectory. A detailed description of the developed control model and analytical dependencies for setting the parameters of the model. An example of selection of coefficients for its setting is shown, recommendations for other types of calculation modes are offered. In this paper, the calculation of one calculation case corresponding to the rearrangement of the car, followed by a return to the original lane. This example proves the adequacy of the model. The developed mathematical model can be used in the systems of calculation of solid body dynamos in the simulation of driver-driven cars, unmanned vehicles and adaptive driver assistance systems. The vehicle was described as a system of solid bodies connected by hinges and force interactions from the library of typical elements of the software package. According to this description of the system, the software package automatically formed a system of equations of motion and connections. The equations were solved using an implicit numerical method with variable pitch and automatic accuracy control.
Increase ride wheeled vehicles due to the continuous damping control in the suspension system
Authors: Zhileykin M , Fedotov I 
Published: May 2020

Abstract
One of the promising ways to improve the wheeled vehicles smooth running is the development of dynamic semi-active springing systems, as well as the laws of such systems control. Dynamic control systems in this paper are understood as systems operating at a real-time rate with the current (instantaneous) phase coordinates values. The aim of the work is to develop the laws of optimal control of the wheeled vehicles suspension, providing an increase in the driver and passengers comfort in a wide range of operating conditions. The of the optimal control system algorithm of the level of damping shock absorber suspension wheel machine to improve of the driver and passengers comfort. The proposed algorithm efficiency is proved by simulation methods. It is established that at rectilinear movement on different roads with different speeds, the level of the movement comfort is increased by 8 to 41% when the frequency controlling effect of 15 Hz and 13…59% at the frequency control action of 50 Hz compared to uncontrolled suspension.
Simulation of regenerative pump performing on multiphase mixture
Authors: Zaporozhets I , Kalugina M , Mukhlaeva A , Isaev N , Protopopov A 
Published: May 2020

Abstract
The features of gas-liquid mixtures hydrodynamic modeling during the separation process are described. The paper considers the model of a centrifugal pump, which is a part of mobile objects, such as wheeled and tracked vehicles etc. The simulation is carried out in the STAR-CCM + software. A comparison of the effect of gas separators various designs on the flow during the operation of the pump on a two-phase mixtureis carried out and the most suitable configuration is identified.
Utilization of ZSM-5/TiO2 Powder and Membrane to Reduce Concentration Cu(II) and Cr(VI) Ions in Water
Authors: Mukaromah Ana Hidayati , Chasanah Umrotun , Assyifa Ilma Rizqi , Mifbakuddin  , Sinto Dewi Sri 
Published: May 2020

Abstract
Cancer is an effect caused by excessive concentrations of Cu(II) and Cr(VI) metal ions in the body. Including health effects of heavy metal ion poisoning industries arise when humans consume fish from various wastes, dyes, electroplating, paint, and battery. Techniques and processes have been developed to separate heavy metal ions which were very dangerous from water by ion exchange, chemical precipitation, and adsorption. Adsorption has no harmful side effects to health, simple, economical and easy to do. Natural materials can be used as adsorbents including ZSM-5, ZSM-5/TiO2 powder, and membrane. The purpose of this study is to determine the initial, final concentration and the percentage decrease concentration of Cu(II) and Cr(VI) ions in water by ZSM-5/TiO2 powder and membrane with variations gauze type and irradiation time. The results showed that the highest percentage reduction Cu(II) ion and Cr(VI) ion with 0.25% w/v ZSM-5/TiO2 powder during UV irradiation 75 minutes were 74.99% and 16.99%. The highest percentage reduction in Cu (II) and Cr (VI) concentration after passing through the ZSM-5/TiO2 membrane with gauze support 304-400 during 90 minute UV irradiation were 57.72% and 54.65%. As the conclusion ability of ZSM-5/TiO2 powder is greater than the ZSM-5/TiO2 membrane in reducing the concentration of Cu(II) and Cr(VI).