A new high frequency inductor loss measurement method

Abstract In the terahertz band, the dispersive characteristic of dielectric material is one of the major problems in the scaled radar cross section (RCS) measurement, which is inconsistent with the electrodynamics similitude deducted according to the Maxwell’s equations. Based on the high-frequency estimation method of physical optics (PO), a scaled RCS measurement method for lossy objects is proposed through dynamically matching the reflection coefficients according to the distribution of the object’s facets. Simulations on the model of SLICY were conducted, the inversed RCS of the lossy prototype was obtained using the proposed method. Via comparing the inversed RCS with the calculated results, the validity of the proposed method is demonstrated. The proposed method provides an effective solution to the scaled RCS measurement for lossy objects in the THz band.

Download Full-text

A New Direct Measurement Method of Time Dependent Dielectric Breakdown at High Frequency

IEEE Electron Device Letters ◽

10.1109/led.2020.3016383 ◽

2020 ◽

Vol 41 (10) ◽

pp. 1460-1463

Author(s):

Melissa Arabi ◽

Xavier Garros ◽

Jacques Cluzel ◽

Mustapha Rafik ◽

Xavier Federspiel ◽

...

Keyword(s):

Direct Measurement ◽

High Frequency ◽

Measurement Method ◽

Dielectric Breakdown ◽

Time Dependent ◽

Time Dependent Dielectric Breakdown ◽

Direct Measurement Method

Download Full-text

Postpartum Blood Loss Measurement Using Digital Image Processing

E3S Web of Conferences ◽

10.1051/e3sconf/20187313023 ◽

2018 ◽

Vol 73 ◽

pp. 13023

Author(s):

Siska Febrina Fauziah ◽

Suryono Suryono ◽

Melyana Nurul Widyawati

Keyword(s):

Image Processing ◽

Blood Loss ◽

Blood Volume ◽

Digital Image Processing ◽

Digital Image ◽

Measurement Method ◽

Delivery Care ◽

Loss Measurement ◽

Postpartum Blood Loss ◽

Image Area

Most of maternal mortality is directly caused by obstetric hemorrhage and almost three-quarters of it take place in postpartum period. The risk of maternal death due to hemorrhage can be reduced with prompt and proper care that in turn relates to the blood loss measurement method used. Unfortunately, the most commonly practiced method is not yet accurate enough. This research proposes a postpartum blood loss measurement method using digital image processing. Initially, characterization is carried out to find out blood absorbance against digital image area and blood volume in the underpad. Results of this characterization then serve as the basis for blood loss measurement using digital image processing. This measurement basis is validated by measuring blood volume lost during delivery care. Results show that the area and volume of blood absorbed in the underpad has significant linear relation (R = 0.9734). Digital image processing can be used to measure postpartum blood loss with a high accuracy up to 83.7%. The use of this method is therefore an accurate and objective alternative to the other available method. Nonetheless, the use of this new method must also adhere to standard guidelines in delivery care as to ensure the utmost outcomes.

Download Full-text