Load Resistance Value Changes Affect on the Plane Log-periodic Dipole Printed Antenna Characteristics

2006 ◽  
Author(s):  
Kong Rong ◽  
Su Donglin
Keyword(s):  
Load Resistance ◽  
Printed Antenna ◽  
Value Changes ◽  
Resistance Value ◽  
Antenna Characteristics

Photothermoelectric resistance effect observed in Ti/SiO2/Si structure induced by 10.6 μm CO2 laser

2020 ◽  
Vol 34 (34) ◽  
pp. 2050391
Author(s):  
Xu Sun ◽  
Pengfei Zhu ◽  
Kun Zhu ◽  
Yunxia Ping ◽  
Chaomin Zhang ◽  
...  
Keyword(s):  
Thermal Resistance ◽  
Motion Direction ◽  
Change Rate ◽  
Continuous Irradiation ◽  
Drift Motion ◽  
Diffusion Motion ◽  
Si Films ◽  
Value Changes ◽  
And Diffusion ◽  
Resistance Value

A novel photothermoelectric resistance effect of the Ti/SiO2/Si films induced by 10.6 [Formula: see text]m CO2 laser is discovered and investigated. The transient response of the resistance is observed and analyzed in this work. Under the continuous irradiation of the laser, the thermal resistance value changes with the irradiating time and gradually reaches a stable saturation. The results indicate that the rise time of thermal resistance is shortened and its change rate increased as laser power gets higher. The inner battery of the ohmmeter exerts the positive or negative bias voltage, causing the diffusion motion direction of the hot electrons to be opposite or the same direction with the drift motion, which can increase or decrease the thermal resistance value. Those experimental phenomena are explained by the drift and diffusion motion of the electrons. Based on the results, the Ti/SiO2/Si structure is an attractive candidate for thermal effect devices.

scholarly journals Circuit Topologies for MOS-Type Gas Sensor

Electronics ◽  
2020 ◽  
Vol 9 (3) ◽  
pp. 525
Author(s):  
Javier Cervera Gómez ◽  
Jose Pelegri-Sebastia ◽  
Rafael Lajara
Keyword(s):  
Gas Sensors ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Electrical Characteristics ◽  
Freedom Of Choice ◽  
Power Noise ◽  
Food And Drink ◽  
Value Changes ◽  
Resistance Value ◽  
Conditioning Circuit

Metal Oxide Semiconductor or MOS-type gas sensors are resistive sensors which can detect different reducible or volatile gases in atmospheres with oxygen. These gas sensors have been used in different areas such as food and drink industries or healthcare, among others. In this type of sensor, the resistance value changes when it detects certain types of gases. Due to the electrical characteristics, the sensors need a conditioning circuit to transform and acquire the data. Four different electronic topologies, two different MOS-type gas sensors, and different concentrations of a gas substance are presented and compared in this paper. The study and experimental analysis of the properties of each of the designed topology allows designers to make a choice of the best circuit for a specific application depending on the situation, considering the required power, noise, linearity, and number of sensors to be used. This study will give more freedom of choice, the more adequate electronic conditioning topology for different applications where MOS-type sensors are used, obtaining the best accuracy.

Resource Value Changes and Harvesting Behavior in a Simulated Commons Dilemma

1999 ◽  
Author(s):  
Jeffrey M. Smith ◽  
Karene Harmeyer ◽  
Aimee Mitchell
Keyword(s):  
Resource Value ◽  
Commons Dilemma ◽  
Value Changes

Basic Human Values of Russians and Other Europeans (The Results of 2008 Surveys)

2010 ◽  
pp. 107-130 ◽  
Author(s):  
V. Magun ◽  
M. Rudnev
Keyword(s):  
Cultural Policy ◽  
European Social Survey ◽  
The Other ◽  
Human Values ◽  
Social Survey ◽  
Russian Economy ◽  
Value Diversity ◽  
Cross Country ◽  
Value Changes ◽  
Fourth Round

The authors rely mainly on the data from the fourth round of the European Social Survey held in 2008 in their comparison between the Russian basic values and the values of the 31 other European countries as measured by Schwartz Portrait Values Questionnaire. The authors start from comparing country averages. Then they compare Russia with the other countries taking into account internal country value diversity. And finally they refine cross-country value comparisons taking the advantage of the multiple regression analysis. As revealed from the study there are important value barriers to the Russian economy and society progress and well targeted cultural policy is needed to promote necessary value changes.

Extended electric power sources

2018 ◽  
Author(s):  
T.A. Konev ◽  
V.A. Kuzmin ◽  
E. Yu. Mutovina ◽  
R.D. Puzhaykin ◽  
Vladimir Salomatov
Keyword(s):  
Electric Power ◽  
Electric Current ◽  
Load Resistance ◽  
Active Power ◽  
Operating Voltage ◽  
Power Sources ◽  
Distributed Parameters ◽  
Analytical Expressions ◽  
Characteristic Resistance ◽  
Length Effects

Chemical sources of current are investigated as lines with distributed parameters. Analytical expressions are obtained for the voltage and active power values of the source at different distances from the beginning of the cell as well as dependences of the working voltage and active power on the source length. Effects of a reduction in the operating voltage and active power are due to the flow of electric current along the source during operation. The magnitude of these effects depends not only on the length of the source, but also on the ratio of characteristic resistance to the load resistance.<br>

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