Results 31 to 40 of about 115,222 (300)

PLA Films Containing Montmorillonite Nanoclay–Citronella Essential Oil Hybrids for Potential Active Film Formulation

Macromol, 2023
This work evaluated the synergistic effect of citronella essential oil (Ct) and montmorillonite (MMT) (called hybrid compound) incorporated in Poly(lactic acid) (PLA) films at different concentrations (3, 10, 15, and 20 wt%). PLA films were characterized
Rafaela R. Ferreira, Marilia C. Farina, Anderson Maia, Rondes F. S. Torin   +3 more
doaj   +1 more source

The test bench for simulation impact of core saturation on the current transformer on coordination of inverse relay protection [PDF]

E3S Web of Conferences
When the measurement-type Current Transformer (CT) is used for protection schemes, this condition causes problems related to the operation of the protection relay.
Supriyanto, Utomo Heri Budi, Sunarto
doaj   +1 more source

Investigation of the relationship of CO-RADS and CT patterns with laboratory parameters in COVID-19 patients and a new perspective on the total CT scoring system

BMC Medical Imaging, 2022
Background It is important to determine the correlation of the CO-RADS classification and computed tomography (CT) patterns of the lung with laboratory data.
Nevin Aydin, Pinar Yildiz, Döndü Üsküdar Cansu, Elif Gündogdu, Rüya Mutluay, Göknur Yorulmaz, Melisa Sahin Tekin, Evin Kocaturk, İ. Özkan Alatas, Elif Doyuk Kartal, Nurettin Erben, Gül Durmaz, Nilgun Kasifoglu, Tercan Us, Garip Sahin, Cengiz Bal, Senay Yilmaz, Cengiz Korkmaz   +17 more
doaj   +1 more source

3-D reconstruction of anterior mantle-field techniques in Hodgkin's disease survivors: doses to cardiac structures [PDF]

, 2006
BACKGROUND: The long-term dose-effect relationship for specific cardiac structures in mediastinal radiotherapy has rarely been investigated. As part of an interdisciplinary project, the 3-D dose distribution within the heart was reconstructed in all long-
Angermann Christiane, Oliver Kölbl, Seufert, Ines, Vordermark, Dirk, Dirk Vordermark, Kölbl, Oliver, Kung, Margret, Margret Kung, Schwab Franz, Kung Margret, Flentje Michael, Seufert Ines, Michael Flentje, Schwab, Franz, Flentje, Michael, Angermann, Christiane, Kölbl Oliver, Vordermark Dirk, Franz Schwab, Ines Seufert, Christiane Angermann   +20 more
core   +1 more source

A Time-Domain Pilot Protection for AC Transmission Lines Connecting BESSs Based on Sequence Matching Index

Elektronika ir Elektrotechnika
Battery energy storage station (BESS) possesses flexible operating states and complex fault characteristics. With the continuous increase in its installed capacity and number, the risk of maloperation of traditional relay protection significantly ...
Ping Xiong, Xiaoqian Zhu, Xing Wang, Lie Li, Yifan Zhao, Xiaoyang Yang   +5 more
doaj   +1 more source

Impact of CT saturation on phasor measurement algorithms: Uncertainty and sensitivity study [PDF]

, 2010
An important element of any Intelligent Electronic Device (IED) is the phasor measurement algorithm. The role of such algorithm is to extract fundamental frequency phasors from signals measured on secondary winding of a current transformer (CT).
Ibrahim, M., Zivanovic, R., null Mohammad Nizam Ibrahim, Rastko Zivanovic   +3 more
core   +1 more source

A differential protection method for multi-terminal lines in distribution networks based on the alpha plane of current fault components

Zhejiang dianli
To address the challenges in differential protection applications for multi-terminal lines in distribution networks， such as reduced sensitivity， the inability to compensate for capacitive current under no-voltage conditions， and susceptibility of ...
HAN Jin, XU Guangxue, QIU Yutao, XIE Sixian, SUN Yan, GUAN Jiyong, ZHU Zhiyong   +6 more
doaj   +1 more source

Longitudinal assessment of chest computerized tomography and oxygen saturation for patients with COVID-19

The Egyptian Journal of Radiology and Nuclear Medicine, 2020
Background COVID-19 is a pandemic disease and is important to know the nature of the disease during follow-up. We aimed to study different imaging signs and changes that occurred during the initial scan, follow-up, and complications.
Ahmed M. Osman, Suzan Farouk, Nehad M. Osman, Ahmed M. Abdrabou   +3 more
doaj   +1 more source

A High-Precision Error Calibration Technique for Current Transformers under the Influence of DC Bias

Energies, 2023
A bias current in the power system will cause saturation of the measuring current transformer (CT), leading to an increase in measurement error. Therefore, in this paper, we first conducted measurements of the direct current component in a 10 kV ...
Sanlei Dang, Yong Xiao, Baoshuai Wang, Dingqu Zhang, Bo Zhang, Shanshan Hu, Hongtian Song, Chi Xu, Yiqin Cai   +8 more
doaj   +1 more source

Dynamic Differential Protection of Transformer Considering CT Saturation Based on Waveform Distortion Estimation

IEEE Access
The protection relay performs a significant role in maintaining the power system’s reliability and stability. However, Current Transformer (CT) saturation affects the overcurrent, differential and distance protection under various conditions ...
Nilesh Chothani, Swapnil Kumar
doaj   +1 more source