Results 21 to 30 of about 3,349 (212)

DC Solid-State Circuit Breakers with Two-Winding Coupled Inductor for DC Microgrid

open access: yesEnergies, 2021
Ensuring a protection scheme in a DC distribution system is more difficult to achieve against pole-to-ground faults than in AC distribution system because of the absence of zero crossing points and low line impedance.
Jung-min Park   +4 more
doaj   +1 more source

Design of Dual-wire Bidirectional Blocking Solid-state Circuit Breaker for Deep-sea Medium Voltage DC/DC Converter Based on SiC JFET

open access: yesKongzhi Yu Xinxi Jishu, 2023
Solid-state circuit breakers (SSCBs) are characterized by their capacity to rapidly cut off faulty currents. In the context of deep-sea medium voltage DC/DC converter applications—an environment that necessitates the black start of DC/DC and the ...
CHEN Xiulin, LIU Kean, TANG Zhifeng
doaj   +3 more sources

Research of Central Asian Geopolitics Over the Population Parameter

open access: yesAvrasya İncelemeleri Dergisi, 2022
Those countries who truly grasp the significance of geopolitical power can be said to have learned, in direct or indirect ways, the necessity of a detailed examination of the changing and unchanging elements of geopolitics.
Kaan Kapan, Oğuz Şavlı
doaj   +1 more source

Reproductive Misconception: Why Cloning Is Not Just Another Assisted Reproductive Technology [PDF]

open access: yes, 1999
Nowadays, many different efficient solutions are being studied to solve engineering problems. Inside this group of solutions we can find the Soil Steel Composite Bridges (SSCB) as an alternative to traditional bridges.
Rose, Andre P.
core   +3 more sources

The employment effects of working time reductions: Sector‐level evidence from European reforms

open access: yesIndustrial Relations: A Journal of Economy and Society, Volume 62, Issue 3, Page 217-232, July 2023., 2023
Abstract In this paper, we exploit a panel of industry‐level data in European countries to study the economic impact of national reductions in usual weekly working hours between 1995 and 2007. Our identification strategy relies on the five national reforms that took place over this period and on initial differences across sectors in the share of ...
Cyprien Batut   +2 more
wiley   +1 more source

A review on insulation challenges towards electrification of aircraft

open access: yesHigh Voltage, Volume 8, Issue 2, Page 209-230, April 2023., 2023
Abstract Compared to the traditional aircraft, electrification of power system in aircraft has potential to revolutionise the aviation industry. Typically, more‐electric aircraft (MEA), even all‐electric aircraft has been developed and delivered to decrease the greenhouse gas emission and increase the energy efficiency.
Jun Jiang   +6 more
wiley   +1 more source

State Ideologies, State-led Gender Policies and the Role of Zhenotdel in the Soviet Society Experiences of the 1930s

open access: yesSakarya Üniversitesi Kadın Araştırmaları Dergisi, 2023
This study discusses gender equality appearances in the Union of Soviet Socialist Republics (USSR) during the time period between 1928 when the first five-year plan was implemented and the end of the 1930s.
Muharrem Doğan, Gökhan Sırmalı
doaj   +1 more source

System configuration, fault detection, location, isolation and restoration: a review on LVDC Microgrid protections [PDF]

open access: yes, 2019
Low voltage direct current (LVDC) distribution has gained the significant interest of research due to the advancements in power conversion technologies. However, the use of converters has given rise to several technical issues regarding their protections
Bououden   +11 more
core   +1 more source

Effects of daily full‐term infant skin‐to‐skin contact on behavior and cognition at age three – secondary outcomes of a randomized controlled trial

open access: yesJournal of Child Psychology and Psychiatry, Volume 64, Issue 1, Page 136-144, January 2023., 2023
Background Daily skin‐to‐skin contact (SSC) during early infancy fosters the long‐term development of children born preterm. This is the first randomized controlled trial assessing the potential beneficial effects of daily SSC on executive functioning and socio‐emotional behavior of children born full‐term.
Nicole Rheinheimer   +4 more
wiley   +1 more source

Semiconductor devices in solid-state/hybrid circuit breakers: current status and future trends [PDF]

open access: yes, 2017
Circuit breakers (CBs) are the main protection devices for both alternating current (AC) and direct current (DC) power systems, ranging from tens of watts up to megawatts.
Alan J. Watson   +8 more
core   +1 more source

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