42 research outputs found
Visualizing individual dynamics:The case of a talented adolescent
Research on talent and performance development has primarily focused on inter-individual differences. However, research suggests that performance and the underlying determinants change over time, in an individual-specific dynamic way. This chapter illustrates a method to measure, understand, and visualize the performance- and psychosocial dynamics of a talented adolescent athlete. During one season, a talented tennis player filled out an online diary questionnaire twice a week. We visualized the results using R-scripts that we made openly available. This facilitated the interpretation of the athleteβs performance- and psychosocial dynamics, which are influenced by particular events in the athleteβs life. Altogether, the current study provides insight into how the adolescent and the context interact and mutually affect each other in successive iterations
ΠΠΏΡΡ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ Π°ΠΊΡΡΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π΄ΠΎΠΏΠ»Π΅ΡΠΎΠ²ΡΠΊΠΎΠ³ΠΎ ΠΈΠ·ΠΌΠ΅ΡΠΈΡΠ΅Π»Ρ ΡΠ΅ΡΠ΅Π½ΠΈΠΉ (ΠDCP) Π² ΡΡΠ»ΠΎΠ²ΠΈΡΡ Π§Π΅ΡΠ½ΠΎΠ³ΠΎ ΠΌΠΎΡΡ
Π ΡΡΠ°ΡΡΠ΅ ΠΈΠ·Π»Π°Π³Π°Π΅ΡΡΡ ΠΌΠ΅ΡΠΎΠ΄ΠΈΠΊΠ° ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½ΠΈΠΉ Lowered ADCP ΠΈ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΈ ΠΏΠ΅ΡΠ²ΠΈΡΠ½ΠΎΠΉ ΠΈΠ½ΡΠΎΡΠΌΠ°ΡΠΈΠΈ. ΠΡΠΈ ΠΏΠΎΡΠ»Π΅Π΄ΡΡΡΠ΅ΠΉ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠ΅ Π΄Π°Π½Π½ΡΡ
ΡΠΈΡΠΎΠΊΠΎ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π»ΡΡ ΠΎΠΏΡΡ ΠΠΠ ΠΠΠΠ£ Ρ Π°Π½Π°Π»ΠΎΠ³ΠΈΡΠ½ΡΠΌΠΈ Π°ΠΊΡΡΡΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ ΠΈΠ·ΠΌΠ΅ΡΠΈΡΠ΅Π»ΡΠΌΠΈ ΡΠ΅ΡΠ΅Π½ΠΈΠΉ Π² 80-Π΅ Π³Π³. Π ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠ΅ ΠΎΠ±ΠΎΠ±ΡΠ΅Π½ ΠΎΠΏΡΡ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΡ Lowered ADCP Π² ΡΡΠ»ΠΎΠ²ΠΈΡΡ
Π§Π΅ΡΠ½ΠΎΠ³ΠΎ ΠΌΠΎΡΡ, Π΄Π°Π½Ρ Π°Π»Π³ΠΎΡΠΈΡΠΌΡ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΈ Π΄Π°Π½Π½ΡΡ
, ΠΏΡΠΈΠ²Π΅Π΄Π΅Π½Ρ ΠΏΡΠΎΡΠΈΠ»ΠΈ Π°Π±ΡΠΎΠ»ΡΡΠ½ΠΎΠΉ ΡΠΊΠΎΡΠΎΡΡΠΈ ΡΠ΅ΡΠ΅Π½ΠΈΠΉ Π½Π° ΡΡΠ΄Π΅ ΡΡΠ°Π½ΡΠΈΠΉ ΠΈ ΠΏΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ ΠΏΡΠ΅Π΄Π»Π°Π³Π°Π΅ΠΌΡΠΉ ΠΏΠΎΠ΄Ρ
ΠΎΠ΄ Π΄Π°Π΅Ρ Π±ΠΎΠ»Π΅Π΅ Π°Π΄Π΅ΠΊΠ²Π°ΡΠ½ΡΡ ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅Π½Π½ΡΡ ΠΈ ΠΊΠΎΠ»ΠΈΡΠ΅ΡΡΠ²Π΅Π½Π½ΡΡ ΠΎΡΠ΅Π½ΠΊΡ ΠΏΡΠΎΡΠΈΠ»Ρ ΡΠΊΠΎΡΠΎΡΡΠΈ ΡΠ΅ΡΠ΅Π½ΠΈΡ, ΡΠ΅ΠΌ ΠΈΠ·Π²Π΅ΡΡΠ½ΡΠ΅ ΠΌΠ΅ΡΠΎΠ΄Ρ.The methods of measurements with Lowered ADCP and processing of the initial information are presented. During the following data processing the experience of Marine Hydrophysical Institute of NAS of Ukraine with the similar acoustic currents meters in the 80-ies was widely applied. As a result the experience of Lowered ADCP application under the Black Sea conditions is generalized, the algorithms of data processing are given, the profiles of absolute speed of currents are given on the series of stations. It is shown that the proposed approach provides more adequate qualitative and quantitative estimation of the current velocity profile than the known methods do
Visco-elastic energy dissipation in a SiAlON ceramic: quantification and implications for fatigue resistance
During the last decade there has been increasing concern about the fatigue resistance of structural ceramics. In the case of non-transforming monolithic ceramics (as Si3N4, SiC and Al2O3) it appears that damage induced in the wake or at the tip of slowly growing cracks decreases lifetimes under cyclic loads at room temperature, as compared to lifetimes under static loads (1,2). Under cyclic mechanical loading at high temperatures, both lower (3), but also higher lifetimes compared to static loading have been observed in a number of cases (4-10). The extent of the latter, so-called positive, fatigue effect is assumed to be closely related to the volume fraction and viscosity of the amorphous grain boundary residues of the sintering additives.
In this letter a method to estimate the visco-elastic response of monolithic ceramics to cyclic loading conditions at high temperatures is proposed. A relation is observed between the visco-elastic energy dissipation measured for two silicon nitride materials, and the structural characteristics of their respective intergranular phases. Some consequences for the fatigue resistance of the tested materials, and of non-transforming monolithic ceramics in general, are discussed.status: publishe
Fatigue resistant silicon nitride ceramics due to anelastic deformation and energy dissipation
To investigate the link between internal friction and fatigue resistance of sintered silicon nitride at elevated temperatures, impulse excitation, torsion pendulum and uniaxial tension-compression tests were performed. At low stress-amplitudes, an internal friction peak is observed and associated with the glass transition of amorphous intergranular phases (IGPs). This peak constitutes a reliable means of energy dissipation for otherwise brittle ceramics. The high amplitude uniaxial tests have revealed a new and much larger internal friction effect than previously could be expected from low amplitude test results. Rheological analysis indicates that the underlying deformation is truly anelastic. Within the investigated stress-amplitude range (30-150 MPa), the damping is shown to increase Linearly with stress-amplitude. As a consequence, energy dissipation in a cyclically loaded component will increase locally at stress concentrations such as crack tips. This results in an increased crack propagation resistance, and explains earlier observations of a positive fatigue effect in sintered silicon nitride at high temperature. (C) 2000 Elsevier Science S.A. All rights reserved.status: publishe
The Multi-Thread Graph Model for Embedded Software Synthesis
Software synthesis is a new approachwhich focuses on the support of real-time embedded software systems without the use of operating-systems. Our software synthesis methodology starts from a concurrent process system specification and tries to automate the mapping of this description onto a single processor. The internal system-level model which captures the embedded software and which is the backbone of our software synthesis methodology, is presented. The model is suited for the encapsulation of fine-grain behavior, support of multiple threads of control (concurrency), synchronization, data communication, hierarchy and timing constraints. Additionally, it is shown how the model is used to address the software scheduling sub-task within our software synthesis methodology. I. INTRODUCTION The target application domain of our software synthesis approach is advanced real-time information processing systems, such as personal communication systems. To make miniaturization possible and to r..