Results 61 to 70 of about 13,614 (252)

Subgingival instrumentation

Periodontology 2000, EarlyView., 2023
Abstract The S3‐level clinical guidelines for the treatment of patients with periodontitis stages I–III published by the European Federation of Periodontology in 2020, suggest a pre‐established stepwise approach for oral‐healthcare professionals with precise therapeutic pathways.
Cristiano Tomasi, Kajsa H. Abrahamsson, Danae Apatzidou   +2 more
wiley   +1 more source

Intelligent analysis method for dynamic response of receiving system with embedded HVDC

电力工程技术
High-voltage direct current system embedded in large-scale AC power systems will further increase the impact of commutation failure, DC blocking and other faults on system security and stability.
WANG Zhiwei, HUANG Junhui, SUN Wentao, SUN Fangyuan, LAN Tu, DIAO Ruisheng   +5 more
doaj   +1 more source

Very Special Relativity

, 2006
By Very Special Relativity (VSR) we mean descriptions of nature whose space-time symmetries are certain proper subgroups of the Poincar\'e group. These subgroups contain space-time translations together with at least a 2-parameter subgroup of the Lorentz
Cohen, Andrew G., Glashow, Sheldon L.
core   +2 more sources

Fixing the Leaky Pipeline: Affirmative Action in Local Elite Colleges and Subject Choice

Southern Economic Journal, EarlyView.
ABSTRACT Women are largely underrepresented in STEM careers associated with higher labor market returns. This gender gap is even more stark in a context where societal biases are prevalent and female role models are lacking. This paper investigates the impact of an affirmative action (AA) policy implemented in an elite educational institution in India ...
Ritika Gupta
wiley   +1 more source

A novel control strategy to suppress transient overvoltage balancing active power impact reduction caused by commutation failure

International Journal of Electrical Power & Energy Systems
The line-commutated high voltage direct current (LCC-HVDC) is easy to occur commutation failure (CF), during the CF and recovery period, lots of reactive power surplus can cause transient overvoltage (TOV) in the sending end system.
Wan Liu, Chunya Yin, Fengting Li, Xiaozhu Li, Lu Han, Yining Zhang   +5 more
doaj   +1 more source

The analysis of time multiplexing systems for partial success [PDF]

Time division multiplexing system analysis for partial ...
Bourke, D. G.
core   +1 more source

Monitoring the effects of ovariectomy on seasonal movement behavior in suburban female white‐tailed deer using internet of things‐enabled devices

Wildlife Biology, EarlyView.
Abundant deer populations often cause conflicts in suburban communities, yet traditional population reduction methods, such as controlled hunting, can be challenging to implement. Fertility control, specifically through ovariectomy, can limit reproduction and reduce populations in certain settings, but its effect on movement behavior remains poorly ...
Vickie DeNicola, Stefano Mezzini, Francesca Cagnacci   +2 more
wiley   +1 more source

Benchmark model of the DC sending-end system with high-penetration renewable energy for voltage stability analysis

Frontiers in Energy Research
IntroductionWith the increasing integration of renewable energy, the power grid is gradually facing multi-mode voltage stability problems, especially at the DC sending end.
Minglei Jiang, Shengyao Shi, Pupu Chao, Zhipeng Zhang, Xin She, Kerui Ma, Kaiping Wang, Dachi Zhang, Xin Li   +8 more
doaj   +1 more source

Multiterminal High‐Voltage Direct Current Projects: A Comprehensive Assessment and Future Prospects

High Voltage, EarlyView.
ABSTRACT Multiterminal high‐voltage direct current (MT‐HVDC) systems are an important part of modern power systems, addressing the need for bulk power delivery and efficient renewable energy integration. This paper provides a comprehensive overview of recent advances in MT‐HVDC technology, including launched projects and ongoing initiatives.
Mohammad Hossein Mousavi, Hassan Moradi, Kumars Rouzbehi, Vijay K. Sood   +3 more
wiley   +1 more source

Investigation of the Simplified Equivalent Circuit Model of the Post‐Arc Sheath Stage in DC Vacuum Circuit Breakers

High Voltage, EarlyView.
ABSTRACT This paper presents a simplified equivalent circuit model (ECM) for the post‐arc sheath stage in DC vacuum circuit breakers and outlines the method for calculating circuit parameters using the particle‐in‐cell Monte Carlo collision (PIC‐MCC) method. The post‐arc sheath is modelled as a parallel combination of a variable resistor and a variable
Xubin Li, Xingyu Guo, Wen Wang, Xiaoming Liu, Minfu Liao, Jiyan Zou   +5 more
wiley   +1 more source