scholarly journals A NEW METHOD FOR EVALUATING WATER BEHAVIOR IN UNSATURATED SOIL BASED ON GROUND TEMPERATURE MEASUREMENT RESULTS

2009 ◽  
Vol 65 (2) ◽  
pp. 334-348
Author(s):  
Tomoaki SATOMI ◽  
Kazunari SAKO ◽  
Ikuo YASUKAWA ◽  
Ryoichi FUKAGAWA
Keyword(s):  
Temperature Measurement ◽  
Unsaturated Soil ◽  
Ground Temperature ◽  
New Method ◽  
Measurement Results ◽  
Water Behavior

Rancang Bangun Pengukur Suhu Tubuh Dengan Multi Sensor Untuk Mencegah Penyebaran Covid-19

2021 ◽  
Vol 5 (3) ◽  
pp. 543-549
Author(s):  
Helmy Yudhistira Putra ◽  
Utomo Budiyanto
Keyword(s):  
Body Temperature ◽  
Temperature Measurement ◽  
Temperature Sensor ◽  
The Body ◽  
Body Temperatures ◽  
Heat Measurement ◽  
Turn On ◽  
Measurement Results ◽  
Door Lock ◽  
Body Heat

During the COVID-19 pandemic, the price of preventive equipment such as masks and hand sanitizers has increased significantly. Likewise, thermometers are experiencing an increase and scarcity, this tool is also sought after by many companies for screening employees and guests before entering the building to detect body temperatures that are suspected of being positive for COVID-19. The use of a thermometer operated by humans is very risky because dealing directly with people who could be ODP (People Under Monitoring/Suscpected ) or even positive for COVID-19, therefore we need tools for automatic body temperature screening and do not involve humans for the examination. This research uses the MLX-90614 body temperature sensor equipped with an ultrasonic support sensor to detect movement and measure the distance between the forehead and the temperature sensor so that the body heat measurement works optimally, and a 16x2 LCD to display the temperature measurement results. If the measured body temperature is more than 37.5 ° C degrees Celsius then the buzzer will turn on and the selenoid door lock will not open and will send a notification to the Telegram messaging application. The final result obtained is the formation of a prototype device for measuring body temperature automatically without the need to involve humans in measuring body temperature to control people who want to enter the building so as to reduce the risk of COVID-19 transmission

scholarly journals A New Method to Extract Gate Bias-Dependent Parasitic Resistances in GaAs pHEMTs

Electronics ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 266
Author(s):  
Ruirui Dang ◽  
Lijie Yang ◽  
Zhihao Lv ◽  
Chunyi Song ◽  
Zhiwei Xu
Keyword(s):  
Parameter Extraction ◽  
New Method ◽  
Small Signal ◽  
Gate Bias ◽  
Large Signal ◽  
S Parameter ◽  
Proposed Model ◽  
Measurement Results ◽  
Parasitic Parameter ◽  
Signal Models

Accurate large signal GaAs pHEMT models are essential for devices’ performance analysis and microwave circuit design. This, in turn, mandates precise small signal models. However, the accuracy of small signal models strongly depends on reliable parasitic parameter extraction of GaAs pHEMT, which also greatly influences the extraction of intrinsic elements. Specifically, the parasitic source and drain resistances, R s and R d , are gate bias-dependent, due to the two-dimensional charge variations. In this paper, we propose a new method to extract R s and R d directly from S-parameter measurements of the device under test (DUT), which save excessive measurements and complicated parameter extraction. We have validated the proposed method in both simulation and on-wafer measurement, which achieves better accuracy than the existing state-of-the-art in a frequency range of 0.5–40 GHz. Furthermore, we develop a GaAs pHEMT power amplifier (PA) to further validate the developed model. The measurement results of the PA at 9–15 GHz agree with the simulation results using the proposed model.

Dual Wavelength Temperature Monitoring of TBC Coated Alstom 13E2 Turbine Blades

2003 ◽  
Author(s):  
R. A. Rooth ◽  
W. Hiemstra
Keyword(s):  
Temperature Measurement ◽  
Gas Turbine ◽  
Turbine Blades ◽  
Temperature Measurements ◽  
Primary Interest ◽  
Long Wavelength ◽  
Work Related ◽  
Fiber Technology ◽  
Measurement Results ◽  
First Time

Through rapid developments in fiber technology and data acquisition technology, pyrometry has become a successful tool for the measurement of gas turbine blade temperatures. The technology enables gas turbine owners and operators to monitor the blades and to optimise the exploitation of their assets in terms of efficiency and maintenance. With the application of thermal barrier coatings on turbine blades, pyrometry faces a new challenge as these coatings are not opaque at commonly used wavelengths. The application of TBC’s to protect the metal blades allows an increase of the firing temperature, increasing the efficiency of the installation, but is potentially an additional cause of locally overheating blades in the case the coating comes off. The present paper reports on the results of experimental work related to the temperature measurement on an in service Alstom 13E2 turbine with TBC coated first stage blades. Temperature measurements have been performed with both short- and long wavelength instruments (1 μm and 10 μm). The optical characteristics of ZrO2 material at a range of temperatures have been determined. These characteristics are important in the implementation of an algorithm that calculates the metal temperature from the temperature measurement results. These metal temperatures are of primary interest, This is the first time that experimental radiation temperature measurements on an industrial turbine, using both 1 and 10 μm technology, are reported. As the measurement trace over the turbine airfoil consists of areas on the blade that are covered with TBC as well as uncovered areas, a very interesting comparison on the merits of the various systems can be presented.

scholarly journals Temperature Verification of Hybrid Microelectronic Circuit Design

1983 ◽  
Vol 10 (2-3) ◽  
pp. 63-66 ◽  
Author(s):  
Sedat Širbegovic ◽  
Milan Mazalica ◽  
Ratko Krcmar
Keyword(s):  
Temperature Measurement ◽  
Reliability Analysis ◽  
Circuit Design ◽  
Hot Spots ◽  
Critical Component ◽  
Critical Temperatures ◽  
Component Reliability ◽  
Measurement Results ◽  
Infrared Microscope ◽  
Banja Luka

The paper includes temperature measurement results on hybrid microelectronic circuit surfaces carried out by infrared microscope with special attention to critical temperatures (hot spots) which may require hybrid microelectronic circuit redesign. Critical component reliability analysis, as well as the need for replacement with more reliable components is considered. The principle for hybrid microelectronic design verification suggested.The paper is the result of longterm efforts at the Rudi Čajavec Factory in Banja Luka, where we have been investigating the possibilities for very reliable hybrid microelectronic circuit design.

A Permittivity Measurement Method Based on Cavity Perturbation Technique

2014 ◽  
Vol 590 ◽  
pp. 629-633 ◽  
Author(s):  
Qian Chen ◽  
Yang Yang ◽  
Ka Ma Huang ◽  
Cheng Chen ◽  
Kai Yong Wang
Keyword(s):  
Temperature Measurement ◽  
Complex Permittivity ◽  
Measurement Method ◽  
Perturbation Technique ◽  
Laboratory Method ◽  
Microwave Chemistry ◽  
Permittivity Measurement ◽  
Microwave Engineering ◽  
Measurement Results ◽  
Permittivity Measurements

Effective complex permittivity measurements of materials are important in microwave engineering and microwave chemistry. This paper describes a convenient laboratory method designed to obtain the permittivity for some materials. The hole for temperature measurement has been designed. The permittivity of materials at deferent temperature can be measured. The measurement results of the real part and imaginary part of the permittivity agree well with literature data at 2.45GHz.

scholarly journals Design Of Bedside Monitor Based On Microcontroller

2019 ◽  
Vol 11 (4) ◽  
Author(s):  
Bambang Guruh Irianto ◽  
Agus Susilo Wibowo ◽  
Dwi Herry Andayani
Keyword(s):  
Heart Rate ◽  
Standard Deviation ◽  
Experimental Design ◽  
Temperature Measurement ◽  
Free Variable ◽  
Ecg Signal ◽  
Measurement Result ◽  
Measurement Results ◽  
Quasi Experimental ◽  
Bedside Monitor

A Bedside monitor is the equipment used to monitor patient condition through some parameters that need sustainable monitoring so that the patient condition is always monitored. This research is monitored by 5 parameters namely heart signal, heart rate, temperature, respiration and SPO2. This research applies quasi experimental design. The free variable is an ECG phantom or human, and the dependent variable is a bedside monitor. The research instruments are a calibration equipment of ECG signal, temperature, and respiration. The result of the heart signal lead 2 is not different from the standard and the result of the heart rate lead has uncertainty (probability) 0 for Lead 2; which is still under the tolerance number (0.5). The results of the temperature measurement of 5 samples with 5 measurements show that there are 3 samples which have standard deviation and 0 (zero) uncertainty, whereas 2 samples have 0.76 (higher than 0.5) uncertainty. This condition is influenced by the patient movements, so the sensor attached on the patient-body does not fit with the standard installation. The respiration measurement results have an accuracy of 98%, while the SPO2 results have a standard deviation and uncertainty below 5% after being compared with the standard calculations. Here are the details: standard deviation 0.894427; 0.547723; 0.44; Probability 0.4; 0.244949; 0.2 and 0.2. Overall, it can be concluded that The Design of  Bedside Monitor Based on Microcontroller is feasible and the measurement result of heart signal Lead 2, heart rate, temperature, respiration, SPO2 can be presented on a PC.

Value of Scatter-Graphs for the Assessment of ECG Computer Measurement Results

1990 ◽  
Vol 29 (04) ◽  
pp. 413-423 ◽  
Author(s):  
P. Rubel ◽  
J. L. Willems ◽  
D. Morlet
Keyword(s):  
Standard Deviation ◽  
Performance Assessment ◽  
Gold Standard ◽  
Evaluation Method ◽  
New Method ◽  
Main Program ◽  
Measurement Study ◽  
Point Estimates ◽  
Computer Measurement ◽  
Measurement Results

AbstractA new method is presented, different from usual methods, for the discussion of the results of computer ECG measurement programs, based on a new graphical evaluation method. The proposed “scatter-graphs” both highlight the main program results and facilitate the comparison between various wave-recognition algorithms. They allow the distinction between the reliability of an algorithm, which is its capacity to provide a maximum of measurements with a minimum amount of errors, and its precision, i.e., the standard deviation of the differences between its point estimates and the reference.The method proves to be a powerful tool for the discussion of individual, as well as the median program results in CSE Measurement Study. It allows to highlight limitations induced in performance assessment by the variability of the reference itself, and to state that the median program is at least as close to the “Gold Standard” as the median of the referees.

Seasonal Soil Freezing Characters in Daxinganling

2013 ◽  
Vol 652-654 ◽  
pp. 1668-1672
Author(s):  
Lin Ding ◽  
Yan Jie Liu ◽  
Yi Mei Min
Keyword(s):  
Thermal Conductivity ◽  
Numerical Simulation ◽  
Moisture Content ◽  
Laboratory Test ◽  
Transition Function ◽  
Ground Temperature ◽  
Soil Freezing ◽  
Seasonal Freezing ◽  
Freezing Soil ◽  
Water Behavior

For understanding the transport of groundwater existing in the seasonal freezing soil，laboratory test and field monitoring (frozen depth、moisture content and ground temperature in five months) were carried out in Daxinganling. A translocation model is built to analyze water behavior. The result shows that thermal conductivity will increase approximately one percent when temperature decreases 1°C. A transition function is used to prevent non-convergence in the numerical simulation. The simulation proves that the modified numerical simulation can reveal the law of moisture and heat translocation, and further offer guidance in practice.

Sign in / Sign up

Export Citation Format

Share Document