scholarly journals Time-Domain Pulse Waveform Correction for Pulsed Electric Field Measurement in Microwave Cable with Frequency-Dependent Loss

2021 ◽  
Vol 21 (5) ◽  
pp. 359-368
Author(s):  
Jaehoon Jeong ◽  
Cheonho Kim ◽  
Jiheon Ryu
Keyword(s):  
Transfer Function ◽  
Electric Fields ◽  
Input Pulse ◽  
Output Pulse ◽  
Correction Method ◽  
Test Results ◽  
Scattering Parameters ◽  
Peak Voltage ◽  
Frequency Dependent ◽  
Measurement Results

This paper presents a method that corrects pulse waveforms distorted by the frequency-dependent loss of microwave cables in measuring pulsed electric fields (PEFs). Because the distortion resulting from the microwave cable disrupts accurate PEF measurements, the distorted pulse should be corrected for precise PEF effect testing. The proposed correction method is achieved by a transfer function that is determined by ABCD parameters calculated from the scattering parameters of the cable. A 10-m microwave cable is tested to validate the proposed method, where the input pulse is a 2-ns sine pulse of a single cycle. Here, the output pulse, scattering parameters, and cable resistance are measured. These measurement results are used to represent the transfer function in MATLAB for the proposed correction method. The test results show that the corrected pulse obtained from the transfer function has an error of 4.5% in the peak-to-peak voltage and an error of 0.8% in the bipolar pulse width compared to the reference input pulse. The errors of PEF measurement decrease dramatically by using the proposed correction method. Moreover, the correction method is validated for various pulse durations, pulse shapes, and cable types.

Dynamic Characteristics Analysis of a Silicon Pressure Sensor Using Network Methods

2014 ◽  
Author(s):  
Markus Hessinger ◽  
Roland Werthschützky
Keyword(s):  
Transfer Function ◽  
Pressure Sensor ◽  
Dynamical Behavior ◽  
Early Investigation ◽  
Electromechanical Systems ◽  
System Description ◽  
Network Methods ◽  
Measurement Results ◽  
Characteristics Analysis ◽  
Dynamic Characteristics Analysis

This paper presents a method to describe electromechanical systems with an equivalent network description for an early investigation of the dynamical behavior during the design process. The procedure using equivalent circuits modeling for system description is outlined with an example of characterizing a silicon pressure sensor for a first analysis of its transmission behavior. Therefore, the sensor is separated into acoustic and mechanical systems of the casing and electromechanical systems of the silicon element. Friction, compliance and mass of the diaphragm for the pressure application are modeled in the mechanical domain using the equivalent electrical symbols of resistance, inductance and capacity. The pressure transmission with a filling fluid in a canal is modeled using acoustic parameters. The solution of the transfer function enables an analysis of the amplitude frequency response between the acoustic, mechanical and electric systems of the sensor. A first comparison between simulation and measurement results shows a correlation in the pressure transfer function of the silicon sensor.

Launching of Ships and Floating Structures from Horizontal Berth by Tipping Table

1998 ◽  
Vol 14 (04) ◽  
pp. 265-276
Author(s):  
Ivo Senjanovic
Keyword(s):  
Structural Dynamics ◽  
Review Paper ◽  
Offshore Structures ◽  
Model Tests ◽  
Full Scale ◽  
Strength Analysis ◽  
Test Results ◽  
Floating Structures ◽  
Measurement Results

This review paper covers extensive investigations which were undertaken in order to verify the idea of launching of ships and other floating structures from a horizontal berth by a set of turning pads. This includes structural dynamics during launching, model tests and strength analysis of the structure and the launching system. The most important results, which were used for the design of the launching system, are presented. The preparation of a barge for side launching is described, and the full-scale measurement results are compared with the test results. The advantages of building ships and offshore structures on a horizontal berth are pointed out in the conclusion.

scholarly journals Design of Monitoring Tool Heartbeat Rate and Human Body Temperature Based on WEB

2018 ◽  
Vol 164 ◽  
pp. 01017 ◽  
Author(s):  
Jalinas ◽  
Wahyu Kusuma Raharja ◽  
Bobby Putra Emas Wijaya
Keyword(s):  
Heart Rate ◽  
Body Temperature ◽  
Human Body ◽  
Average Error ◽  
Web Pages ◽  
Test Results ◽  
Pulse Sensor ◽  
Measurement Results ◽  
Human Body Temperature ◽  
Error Percentage

The heart is one of the most important organs in the human body. One way to know heart health is to measure the number of heart beats per minute and body temperature also shows health, many heart rate and body temperature devices but can only be accessed offline. This research aims to design a heart rate detector and human body temperature that the measurement results can be accessed via web pages anywhere and anytime. This device can be used by many users by entering different ID numbers. The design consists of input blocks: pulse sensor, DS18B20 sensor and 3x4 keypad button. Process blocks: Arduino Mega 2560 Microcontroller, Ethernet Shield, router and USB modem. And output block: 16x2 LCD and mobile phone or PC to access web page. Based on the test results, this tool successfully measures the heart rate with an average error percentage of 2.702 % when compared with the oxymeter tool. On the measurement of body temperature get the result of the average error percentage of 2.18 %.

scholarly journals Hubungan Mean Arterial Pressure (MAP) Dengan Preeklamsia Pada Ibu Hamil Di Puskesmas Bontobangun Kabupaten Bulukumba

2020 ◽  
Vol 5 (2) ◽  
pp. 138-145
Author(s):  
Ely Kurniati ◽  
Rusnawati
Keyword(s):  
Mean Arterial Pressure ◽  
Arterial Pressure ◽  
Pregnant Women ◽  
Sampling Method ◽  
Blood Pressure Measurement ◽  
Test Results ◽  
Historical Cohort ◽  
Measurement Results ◽  
History Of ◽  
The Mean

Preeclampsia complicates 4-7% of pregnancies and remains the leading cause of maternal and fetal morbidity and mortality worldwide. Despite improvements in health care over the last decade, preeclampsia remains the second most common cause of maternal mortality in Indonesia. This study aims to determine whether the mean arterial pressure (MAP) is related to the incidence of preeclampsia in pregnant women at the Bontobangun Puskesmas, Bulukumba district for the period 2018 to 2019. This research uses a descriptive-analytic approach with Historical Cohort Studies, namely by looking at the cohort book of the history of blood pressure measurement results for pregnant women at the Bontobangun Public Health Center, Bulukumba Regency for the period 2018 to 2019. Determining the sample using the sampling method taken by purposive sampling. 31 samples of pregnant women who experienced preeclampsia and 31 controls were pregnant women with normal conditions who had certain criteria (matching) with the sample. The results explained that from the paired T-test results, the value of α> 0.037 so that it is said that there is a relationship between mean artery pressure (MAP) and the incidence of preeclampsia in pregnant women at Bontobangun puskesmas for the period 2018-2019.

scholarly journals Pengembangan Soal Penalaran Model TIMSS untuk Mengukur High Order Thinking (HOT)

2018 ◽  
Vol 1 (1) ◽  
pp. 20
Author(s):  
Indri Nurwahidah
Keyword(s):  
Student Response ◽  
Reliability Test ◽  
Due Diligence ◽  
Research Development ◽  
Test Results ◽  
Multiple Choice Questions ◽  
Student Responses ◽  
Good Product ◽  
Measurement Results ◽  
High Order Thinking

The research was conducted to determine the characteristics and forms of matter; similarly determine the validity, reliability, as well as the students' response to the measurement results HOT reasoning about TIMSS models to measure student HOT developed. The method used is the research development. Products in the form of multiple choice questions as well as the reasons of the students' answers. Student responses obtained from the questionnaire responses the students after using such a matter. Based on the criteria of due diligence in a very good product. Characteristic of reasoning about TIMSS models which contain components reasoning refers to the TIMSS. About the validity of the overall test results show that the question is valid and feasible to use to measure student HOT. Reliability test results indicate that the matter is reliable and can be used well. Student response after use problems in the excellent category, obtained a percentage of 82.66%. HOT measurement results in the category of students is still low, at SMPN 8 Semarang amounted to 51.54%, SMP Kartika III-2 Semarang amounted to 31.16%, and the MTs NU amounted to 47.68% Ungaran. Problem reasoning models that have been developed decent TIMSS used to measure student HOT.

scholarly journals Personalized Reference Intervals in Laboratory Medicine: A New Model Based on Within-Subject Biological Variation

2020 ◽  
Author(s):  
Abdurrahman Coşkun ◽  
Sverre Sandberg ◽  
Ibrahim Unsal ◽  
Coskun Cavusoglu ◽  
Mustafa Serteser ◽  
...  
Keyword(s):  
Steady State ◽  
Personalized Medicine ◽  
Clinical Chemistry ◽  
Reference Interval ◽  
Reference Intervals ◽  
Biological Variation ◽  
Test Results ◽  
Steady State Condition ◽  
Laboratory Test Results ◽  
Measurement Results

Abstract Background The concept of personalized medicine has received widespread attention in the last decade. However, personalized medicine depends on correct diagnosis and monitoring of patients, for which personalized reference intervals for laboratory tests may be beneficial. In this study, we propose a simple model to generate personalized reference intervals based on historical, previously analyzed results, and data on analytical and within-subject biological variation. Methods A model using estimates of analytical and within-subject biological variation and previous test results was developed. We modeled the effect of adding an increasing number of measurement results on the estimation of the personal reference interval. We then used laboratory test results from 784 adult patients (>18 years) considered to be in a steady-state condition to calculate personalized reference intervals for 27 commonly requested clinical chemistry and hematology measurands. Results Increasing the number of measurements had little impact on the total variation around the true homeostatic set point and using ≥3 previous measurement results delivered robust personalized reference intervals. The personalized reference intervals of the study participants were different from one another and, as expected, located within the common reference interval. However, in general they made up only a small proportion of the population-based reference interval. Conclusions Our study shows that, if using results from patients in steady state, only a few previous test results and reliable estimates of within-subject biological variation are required to calculate personalized reference intervals. This may be highly valuable for diagnosing patients as well as for follow-up and treatment.

scholarly journals Rigid-Earth Nutation Models

2000 ◽  
Vol 180 ◽  
pp. 190-195
Author(s):  
J. Souchay
Keyword(s):  
Transfer Function ◽  
Rigid Body ◽  
Earth Model ◽  
High Quality ◽  
Frequency Dependent ◽  
Relative Improvement ◽  
The Earth ◽  
Rigid Earth

AbstractDespite the fact that the main causes of the differences between the observed Earth nutation and that derived from analytical calculations come from geophysical effects associated with nonrigidity (core flattening, core-mantle interactions, oceans, etc…), efforts have been made recently to compute the nutation of the Earth when it is considered to be a rigid body, giving birth to several “rigid Earth nutation models.” The reason for these efforts is that any coefficient of nutation for a realistic Earth (including effects due to nonrigidity) is calculated starting from a coefficient for a rigid-Earth model, using a frequency-dependent transfer function. Therefore it is important to achieve high quality in the determination of rigid-Earth nutation coefficients, in order to isolate the nonrigid effects still not well-modeled.After reviewing various rigid-Earth nutation models which have been established recently and their relative improvement with respect to older ones, we discuss their specifics and their degree of agreement.

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