History of mountain biking

The history of Mountain Biking begins in the mid 1970's when the sport of bicycling was rapidly developing. A few biking 'freaks' in the state of California did nоt just turn a hobby and a number of innovative improvements into a profession with their new 'fat tire' bike. Instead they set in motion a worldwide boom

Adaptive Tuning of Feedback Gain in Time-Delayed Feedback Control

We demonstrate that time-delayed feedback control can be improved by adaptively tuning the feedback gain. This adaptive controller is applied to the stabilization of an unstable fixed point and an unstable periodic orbit embedded in a chaotic attractor. The adaptation algorithm is constructed using the speed-gradient method of control theory. Our computer simulations show that the adaptation algorithm can find an appropriate value of the feedback gain for single and multiple delays. Furthermore, we show that our method is robust to noise and different initial conditions.Comment: 7 pages, 6 figure

Practical application of modern approaches to business valuation

Every day, thousands of participants in the investment profession — investors, portfolio managers, regulators, researchers — face a common and often perplexing question: What is the value of a particular asset? The answers to this question usually determine success or failure in achieving investment objectives. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3126

Weak antilocalization in high mobility Ga(x)In(1-x)As/InP two-dimensional electron gases with strong spin-orbit coupling

We have studied the spin-orbit interaction in a high mobility two-dimensional electron gas in a GaInAs/InP heterostructure as a function of an applied gate voltage as well as a function of temperature. Highly sensitive magnetotransport measurements of weak antilocalization as well as measurements of Shubnikov--de Haas oscillations were performed in a wide range of electron sheet concentrations. In our samples the electron transport takes place in the strong spin precession regime in the whole range of applied gate voltages, which is characterized by the spin precession length being shorter than the elastic mean free path. The magnitude of the Rashba spin-orbit coupling parameter was determined by fitting the experimental curves by a simulated quantum conductance correction according to a model proposed recently by Golub [Phys. Rev. B 71, 235310 (2005)]. A comparison of the Rashba coupling parameter extracted using this model with the values estimated from the analysis of the beating pattern in the Shubnikov--de Haas oscillations showed a good agreement.Comment: 5 pages, 5 figures, accepted for publication in Phys.Rev.

The Study of the Method of Fight Against Formation of Polarizing Layer at the Process of Ultrafiltration Concentration of the Skim Milk

The description of experimental set and the method of processing of the results of the study of the method of fight against formation of polarizing layer in the process of ultrafiltration concentration of skim milk raw material were presented. The results of experimental studies relative to the sparging method application for the prevention of polarizing layer in the process of membrane processing of the skim milk and its influence on the capacity of ultrafiltration membranes were offered. The mathematical models were constructed on the base of regressive equations of factorial experiment using the method of the raw material sparging above the membrane surface for selection of technological parameters of the process of ultrafiltration concentration of the skim milk. The rational working parameters of the process of ultrafiltration concentration of the skim milk using the sparging of the skim milk by the gas bubbles in the direct closeness to the membrane surface were determined. Such working parameters are: pressure– 0,4...0,5 MPa, temperature of skim milk– 40...50 ºС, frequency of sparging of skim milk– 0,10...0,15 min-1, pressure of sparging must be 0,56...0,58 MPa

Implementation of the concept of healthy food in restaurants

Food refers to the most important factors of the environment, which directly affect the human body throughout life. Proper nutrition is an important part of a balanced diet. The regime provides regular meals at certain hours at certain intervals, as well as the distribution of the daily diet by energy value during the day. Adherence to the diet ensures the rhythmic functioning of the digestive system, normal digestion and proper metabolism. The food ration should be composed so that its energy value covers the body's energy expenditure. The organization of a balanced diet is one of the most important factors in maintaining good health and improving efficiency. The diet should be composed so that its energy value covers the body's energy expenditure. Promising in this regard is the introduction of the concept of healthy eating in the daily diet of athletes in various sports. After all, the trends of modern healthy eating show a growing interest among athletes in various sports. The aim of research is to introduce the concept of healthy eating in sports and recreation and restaurants. The following research methods were used in the work: observation analysis (diet), organoleptic evaluation, statistical data processing, consumer evaluation of finished restaurant products according to DSTU. To fulfill our tasks of theoretical generalizations and experimental research, scientifically substantiated the introduction of the concept of healthy eating in the diets, as well as balanced the ingredient composition of the diet by developing and adding chopped semi-finished products using beef and raw materials. In our work let’s offer an innovative model for the use of meatballs for health purposes in the diets of athletes with playing sport