Modern chess has its origins in ancient times. The homeland of chess is considered to be India, but also Persia and China. Through the Arabs and Spain, the game gradually entered Europe. In the 15th century, chess began to take on its modern shape. France became one of the main centers of chess. It is …
Tennis – is this a phenomenon? Tennis is one of the most popular sports of our time. The Association of Tennis Professionals, as it is better known – ATP, was established in 1972 with the aim of protecting the interests of men – professional tennis players. In 1990, the association began organizing an international chain …
Whether there is symmetry, or whether there is no symmetry, is a question that has concerned mankind since ancient times. There are many opinions and disputes about whether there is ideal symmetry in nature. My opinion is that in nature there is, and at the same time, there is no perfect symmetry.In which cases can …
The modern way of life is associated with two extremely negative phenomena, namely – immobility and obesity. We wake up, have breakfast, take the elevator down, start our car, and go to work. We spend at least nine hours there. Then we get in our car, go back home, sit down at the table to …
ABSTRACT: This article examines one of the most important strokes in tennis sport, namely, service strokes. The study covers three types of strokes: flat, slice and kick service strokes. A specially made program has been compiled in the area of MatLab, with the help of which the strongly nonlinear differential equations are integrated. These equations …
A27: Study the Service Strokes in Professional Tennis Read More »
ABSTRACT: The article considers the impact interaction of a railway vehicle with a fixed barrier. The movement of the vehicle is carried out at different velocities. A dynamic model of a buffer is offered, which includes an elastic element, a damper, and a friction mechanism. The elastic element has a nonlinear characteristic. The damper is …
A26: Impact Interaction of a Railway Vehicle with a Fixed Barrier Read More »
ABSTRACT: Bipolar Plates (BPPs) are the most crucial component of the Polymer Electrolyte Membrane (PEM) fuel cell system. To improve fuel cell stack performance and lifetime, corrosion resistance and Interfacial Contact Resistance (ICR) enhancement are two essential factors for metallic BPPs. One of the most effective methods to achieve this purpose is adding a thin …
ABSTRACT: Advances in micro-technologies in recent decades have enabled the production of miniature, inexpensive, integrated accelerometers and gyroscopes suitable for use in the analysis of the motion of various objects, mechanisms, and machines. This paper presents an approach for conducting experiments with a mathematical pendulum using a three-axial micromechanical accelerometer, a low-budget microcontroller, and a …
CP15: Pendulum Experimental Study and Analysis with MEMS Accelerometer Read More »
XXX International Scientific Conference ELECTRONICS – ET2021, September 15 – 17, 2021, Sozopol, BULGARIA https://drive.google.com/open?id=1S7DWzV2zCBu0VDxRpyZBguC4YJhTi1XF&authuser=aniviv027%40gmail.com&usp=drive_fs
ABSTRACT: Modern tennis sport is characterized by constant change in several directions. The most significant of these changes are connected to the design of tennis rackets. The composite material of the rocket’s frame is continuously improved. It is also working hard on improving the tennis strings. Tennis balls are also being modified. All these innovations …
ABSTRACT: The oscillations of a pendulum suspended on an elastic beam are examined. The mathematical pendulum is a material point suspended on an ideal rigid and massless rod. The upper end of the rod is connected by a joint with an elastic beam on two supports. The beam is considered to be perfectly elastic and …
ABSTRACT: The large oscillations of a pendulum are studied. The pendulum is a material point that is suspended on an elastic cord with nonlinear characteristics. The mass of the cord is accepted. It is wrapped around a perfectly rigid and fixed cylinder. The system has two degrees of freedom. Nonlinearity is due to a geometric and …
CP14: Nonlinear Oscillations of a Pendulum Wrapped around a Cylinder Read More »
ABSTRACT: Modern tennis players use a variety of strokes. From the physical point of view, these shots can be classified into eight main groups depending on the way the racket interacts with the tennis ball. These are strokes with top, bottom, side, top-side, and bottom-side rotation, as well as strokes without rotation. These eight interactions …
ABSTRACT: The article examines the three-dimensional vibrations of an elliptical disk. It is rigidly connected to a horizontal cylindrical shaft. The normal axis to the plane of the disk makes an acute angle with the axis of the shaft. The shaft is considered to be a cylindrical perfectly elastic and weightless rod with stiffness of …
A21: Vibrations of Elliptical Disc from Inertial Excitations Read More »
ABSTRACT: The purpose of the study is to examine the adaptation of coal mining enterprises to the requirements of the Climate Agenda and the prospects for a low-carbon future in the Kuzbass region. The subject of the research is the impact of coal mining on the conservation of the region’s biocapacity and the future “green” …
A20: Low-Carbon Development of Kuzbass: Coal Mining and Land Reclamation Read More »
ABSTRACT: This paper treats a matrix approach for the theoretical study of dynamics of relative motion. The body is assumed as arbitrary, asymmetrical, and homogeneous. Based on the developed kinematics and the obtained new theorems, which describe the relative general motion of this body, an additional step is made. New additional dynamic characteristics and new dynamic …
CP13: Matrix Approach in Dynamics of Relative Body Motion Read More »
ABSTRACT: The paper develops a matrix approach for the theoretical study of the kinematics of relative body motion. The body is assumed as arbitrary, asymmetrical, and homogeneous. New additional kinematics characteristics of the body are introduced: vectors-real generalized transmissive, relative and absolute velocities, and accelerations. Two new theorems are defined: theorem for summation of rigid body …
CP12: Matrix Approach on Kinematics of Relative Body Motion Read More »
ABSTRACT: The purpose of the study is to examine the issues of assessing the anthropogenic impact on the ecosystem and sustainable development of a region using the example of Kuzbass. The subject of the study is to substantiate the need to improve the measurements of sustainable development of the regional economy from the point of …
A19: Ecological Footprint and Decoupling in the Sustainable Development of a Region Read More »
ABSTRACT: Shot peening is a surface treatment regularly used to enhance the fatigue life of industrial and mechanical components. Plastic deformation layers are generated by the effects of the bombarded surface. In this regard, recent studies have demonstrated that the Severe Shot Peening (SSP) treatment has an efficient effect on microstructure layers. This event is due …
ABSTRACT: Small vibrations of a cylindrical shaft caused by inertial excitations are studied in this paper. The shaft is vertically situated. It consists of two sections with different cross sections. It is supported by a spherical and a cylindrical joint. The two supporting devices have horizontal elasticity. Between the two supports, and also at the …
A18: Vibrations of Shaft Caused by Inertial Excitations Read More »
