scholarly journals The Dynamic Characteristics of Color-Coded S-Potentials

1970 ◽  
Vol 56 (1) ◽  
pp. 1-15 ◽  
Author(s):  
Henk Spekreijse ◽  
Alan L. Norton
Keyword(s):  
Dynamic Characteristics ◽  
Light Stimulus ◽  
Nonlinear Effects ◽  
Linear Analysis ◽  
Analysis Approach ◽  
Transfer Characteristics ◽  
High Modulation ◽  
Potential Sources ◽  
Different Types ◽  
Modulated Light

A linear analysis approach has been applied to determine the dynamic characteristics of the color-coded S-potentials. Using a sinusoidally modulated light stimulus it could be shown that the monophasic S-potential as well as each of the different components of biphasic and triphasic S-potentials behaves linearly. However, for high modulation depths and high average intensities nonlinear effects, such as saturation, become obvious. The transfer characteristics of the monophasic potentials and each component of the biphasic and triphasic potentials are indistinguishable. Their latencies, however, differ. These findings suggest that the three different types of S-potentials not only originate from functionally comparable cells but also that the dynamic characteristics of the cells presynaptic to the S-potential sources are identical.

Mandibular Implant-Supported Overdenture: An In Vitro Comparison of Ball, Bar, and Magnetic Attachments

2013 ◽  
Vol 39 (3) ◽  
pp. 302-307 ◽  
Author(s):  
V. Manju ◽  
T. Sreelal
Keyword(s):  
Stress Distribution ◽  
Strain Gauge ◽  
Load Transfer ◽  
Implant Surface ◽  
Transfer Characteristics ◽  
Ball Bar ◽  
Different Types ◽  
Dial Gauge ◽  
In Vitro Comparison

In an implant-supported overdenture, the optimal stress distribution on the implants and least denture displacement is desirable. This study compares the load transfer characteristics to the implant and the movement of overdenture among 3 different types of attachments (ball-ring, bar-clip, and magnetic). Stress on the implant surface was measured using the strain-gauge technique and denture displacement by dial gauge. The ball/O-ring produces the optimal stress on the implant body and promotes denture stability.

scholarly journals Nonlinear effects of noradrenergic modulation of olfactory bulb function in adult rodents

2011 ◽  
Vol 105 (4) ◽  
pp. 1432-1443 ◽  
Author(s):  
Christiane Linster ◽  
Qiang Nai ◽  
Matthew Ennis
Keyword(s):  
Olfactory Bulb ◽  
Nonlinear Effects ◽  
Main Olfactory Bulb ◽  
Odor Perception ◽  
Different Types ◽  
Species Specific ◽  
Odor Preferences ◽  
Noradrenergic Modulation ◽  
Specific Odor

The mammalian main olfactory bulb receives a significant noradrenergic input from the locus coeruleus. Norepinephrine (NE) is involved in acquisition of conditioned odor preferences in neonatal animals, in some species-specific odor-dependent behaviors, and in adult odor perception. We provide a detailed review of the functional role of NE in adult rodent main olfactory bulb function. We include cellular, synaptic, network, and behavioral data and use computational simulations to tie these different types of data together.

Investigation of the tyre characteristics under non-steady-state conditions on the basis of road tests

2016 ◽  
Vol 231 (1) ◽  
pp. 3-15 ◽  
Author(s):  
Hubert Sar ◽  
Andrzej Reński ◽  
Janusz Pokorski
Keyword(s):  
Steady State ◽  
Computer Simulations ◽  
Dynamic Characteristics ◽  
Slip Angle ◽  
Real Motion ◽  
Side Force ◽  
The Real ◽  
Different Types ◽  
Non Linear ◽  
The Difference

This paper presents a method of identifying the dynamic characteristics of tyres for non-steady-state conditions on the basis of road measurements on a vehicle. The side force acting on the tyre is presented as a function of not only the slip angle but also the slip angle derivative (i.e. the velocity of the change in the slip angle). Hence, the influence of the manoeuvre dynamics on the tyre characteristics and the difference between the characteristics obtained for steady-state conditions and the characteristics for non-steady-state conditions are shown. Also the results of computer simulations prepared for different types of tyre characteristics are presented in this paper. It is evident from the presented graphs that applying dynamic non-linear tyre characteristics for computer simulations instead of steady-state characteristics enables us to describe the real motion of a vehicle better.

Packing Characteristics and Its Effect on Heat Transfer Characteristics in Melting of Granular Packed Bed Subject to Horizonal Forced Convection

2002 ◽  
Author(s):  
Y. L. Hao ◽  
Y.-X. Tao
Keyword(s):  
Heat Transfer ◽  
Forced Convection ◽  
Melting Process ◽  
Packed Bed ◽  
Time Interval ◽  
Heat Transfer Characteristics ◽  
Transfer Characteristics ◽  
Ice Particles ◽  
Different Types ◽  
Series Of Experiments

A series of experiments are conducted to investigate the characteristics and its effect on the melting and heat of a packed bed consisting of melting ice particles to horizontal forced convection. The volumes and situations of the melting ganular packed beds are by the visualization observations and measurements digital camcorders within the range of Re = 71 ~ 2291, Gr/Re2 = 1.48×10−5 ~ 17.32, and Ste = 0.0444 ~ 0.385, respectively. The mass of ice particles is measured at the time interval during the melting process. Two types of pattern can be found under the different conditions. The different types of heat transfer characteristics emerge in type of packing pattern. The correlations for each type of pattern are obtained based on the experimental results.

scholarly journals Fundamental Frequencies of Vibration of Footbridges in Portugal: FromIn SituMeasurements to Numerical Modelling

2014 ◽  
Vol 2014 ◽  
pp. 1-22 ◽  
Author(s):  
C. S. Oliveira
Keyword(s):  
Mechanical Properties ◽  
Dynamic Characteristics ◽  
Numerical Models ◽  
Great Accuracy ◽  
Negative Power ◽  
Fundamental Frequencies ◽  
Simple Geometry ◽  
Measuring Techniques ◽  
Different Types

Since 1995, we have been measuring thein situdynamic characteristics of different types of footbridges built in Portugal (essentially steel and precast reinforced concrete decks) with single spans running from 11 to 110 m long, using expedite exciting and measuring techniques. A database has been created, containing not only the fundamental dynamic characteristics of those structures (transversal, longitudinal, and vertical frequencies) but also their most important geometric and mechanical properties. This database, with 79 structures organized into 5 main typologies, allows the setting of correlations of fundamental frequencies as a negative power function of span lengthsL  (L-0.6toL-1.4). For 63 footbridges of more simple geometry, it was possible to obtain these correlations by typology. A few illustrative cases representing the most common typologies show that linear numerical models can reproduce thein situmeasurements with great accuracy, not only matching the frequencies of vibration but also the amplitudes of motion caused by several pedestrian load patterns.

scholarly journals DETERMINATION OF THE DYNAMIC CHARACTERISTICS OF FREIGHT WAGONS WITH VARIOUS BOGIE

Transport ◽  
2015 ◽  
Vol 30 (1) ◽  
pp. 88-92 ◽  
Author(s):  
Sergey Myamlin ◽  
Leonas Povilas Lingaitis ◽  
Stasys Dailydka ◽  
Gediminas Vaičiūnas ◽  
Marijonas Bogdevičius ◽  
...  
Keyword(s):  
Dynamic Characteristics ◽  
Traffic Safety ◽  
Realistic Potential ◽  
Dynamic Coefficients ◽  
Different Types ◽  
Maintenance Cycle ◽  
The Stability ◽  
Durability Performance ◽  
Dynamic Indicators

In most cases, dynamic characteristics determine the wagon maintenance cycle, traffic safety, reliability and durability performance. The main dynamic indicators include the vertical Kvd and horizontal Khd dynamic coefficients as well as the stability coefficient Ks, which determines the wheel flange resistance to derailment. The article compares dynamic indications for three different types of bogies. There were no tangible differences observed for all the three different types of bogies running at a speed of 40 to 120 km/h on a direct tangent rail section. Nevertheless, there is a realistic potential to improve the dynamic indicators of a freight wagon by rationalising suspension unit parameters.

Simulation of Flow and Heat Transfer in the MTPV Systems

2013 ◽  
Vol 448-453 ◽  
pp. 3291-3295
Author(s):  
Ge Ping Wu ◽  
Jun Wang ◽  
Ping Lu
Keyword(s):  
Heat Transfer ◽  
Thermal Resistance ◽  
Friction Factor ◽  
Local Heat Transfer ◽  
Local Heat ◽  
Heat Transfer Characteristics ◽  
Pressure Losses ◽  
Transfer Characteristics ◽  
Flow And Heat Transfer ◽  
Different Types

Flow and heat transfer characteristics in the microchannel cooling passages with three different types of the MTPV systems are numerically investigated. Reynolds ranged from 100 to 1000 and hydraulic diameter from 0.4mm to 0.8mm. The steady, laminar flow and heat transfer equations are solved in a finite-volume method. The local heat transfer characteristics, thermal resistance, Nusselt numbers, friction factor and pressure losses of the different types are analyzed. A comparison of the heat transfer coefficient, pressure losses and friction factor of the different microchannels are also presented. The heat transfer performance of the rob bundles microchannel is found to be much better than others. However, the rectangular passage has the lowest thermal resistance than the other types of microchannels.

scholarly journals Mental training in psychological training of shooters

2020 ◽  
pp. 110-114
Author(s):  
O. Shalar ◽  
Y. Strykalenko ◽  
V. Huzar
Keyword(s):  
Nervous System ◽  
Light Stimulus ◽  
Sound Stimulus ◽  
Mental Training ◽  
Mental Processes ◽  
Motor Responses ◽  
Psychological Training ◽  
Different Types ◽  
Positive Effect ◽  
Better Than

The goal was to study the psycho-emotional sphere and substantiate the methodology of mental training for shooters. Material and methods: the study involved 12 rifle and pistol shooters of the Kherson Higher School of Physical Education. Among them are athletes with qualifications of the second, first categories, candidates for Master of Sports and Master of Sports of Ukraine. The study continued during 2018-2019. In the course of the research, the method of mental training of shooters was introduced. The results proved that the means of mental training had a positive effect on the state of the nervous system of shooters. Sensory motor responses were superior in less experienced athletes. So, for shooters of the CCM level and below, the results are better than those of the masters of sports: 1) according to the tapping test for 0.75 ms, 2) according to the reaction to a light stimulus for 12.5 ms, c) according to the reaction to a sound stimulus to 55 5 ms. The degree of training according to the Schulte table was high among all shooters, but slightly higher among the masters of sports (by 0.05). A rather high indicator of emotional excitability was found in shooters of masters of sports. Among the representatives of this group were persons with different types of temperament. Basically, the sanguine type prevailed, based on a strong, balanced, mobile type of the nervous system. For the representatives of the second group, which included candidates for masters of sports and first-class athletes, this indicator was at an average level. In our opinion, this is due to the fact that the representatives of this group had persons with a predominantly phlegmatic type of temperament. Conclusions: mental training had a positive effect on the level of mental processes and emotional sphere of shooters. On the basis of the data obtained on the mental sphere of shooters, it was established that these indicators were at high and sufficient levels.

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