Results 261 to 270 of about 1,761,049 (307)
Some of the next articles are maybe not open access.
Enhanced double circuit line protection
IEEE Transactions on Power Delivery, 1997This paper describes a double circuit line protection relay which has all 6 line currents and voltages available for processing. This allows several alterations to the standard 3-phase distance package which enhance the performance of the protection system. Results are presented for the relay fed with simulated waveforms from a Playback Simulator.
P.G. McLaren +5 more
openaire +1 more source
Enhanced alpha plane line protection
2016 National Power Systems Conference (NPSC), 2016The ratio of currents at both ends of the transmission line is utilized in alpha plane differential principle to detect an internal fault. Such a scheme uses either phase current or sequence currents. As the ratio computed using phase current and sequence currents has their own demerits, both are combined to enhance the security and sensitivity of the ...
Saumendra Sarangi, Ashok Kumar Pradhan
openaire +1 more source
Reflex-mediated enhancement of airway protective mechanisms
The American Journal of Medicine, 2000The upper esophageal sphincter (UES) and lower esophageal sphincter (LES) comprise the basal mechanisms against entry of gastric content into the aerodigestive tract and the airway. There are, however, other mechanisms referred to here as "response mechanisms" that become activated after certain stimulation, such as distention of the esophagus or ...
R, Shaker, W J, Hogan
openaire +2 more sources
Discrimination Between Protective and Enhancing HIV Antibodies
AIDS Research and Human Retroviruses, 1990Most attempts to produce a vaccine against HIV-1 infection are utilizing envelope protein components. Hypothetically such vaccine candidates could stimulate production of antibodies that enhance HIV-1 infection via the macrophage route of entry and, consequently, cannot be detected in the conventional neutralization assay.
JACKY BERNARD +10 more
openaire +2 more sources
Dietary fibres may protect or enhance carcinogenesis
Mutation Research/Genetic Toxicology and Environmental Mutagenesis, 1999Dietary fibre (DF) is widely considered to protect against cancer, especially colorectal cancer. However, a large prospective epidemiological study has shown no apparent effect of DF intake on the development of colorectal cancer. We suggest that this may be because the term DF represents a wide range of materials, some able to protect, but some able ...
P J, Harris, L R, Ferguson
openaire +2 more sources
Enhanced protection security using system integrity protection scheme (SIPS)
2016 IEEE Power and Energy Society General Meeting (PESGM), 2016Events such as faults, loss of load or generation may cause unwanted relay operations which initiate cascade tripping leading to system collapse. Security of power system protection is a major concern for utilities. A System Integrated Protection Scheme (SIPS) based approach is proposed for improving security of protection operations. Identification of
Pratim Kundu, Ashok Pradhan
openaire +1 more source
Secure Bit Enhanced Canary: Hardware Enhanced Buffer-Overflow Protection
2008 IFIP International Conference on Network and Parallel Computing, 2008Piromsopa and Enbody (2006) proposed Secure Bit, an architectural approach to protect against buffer-overflow attacks on control data (return-addresses and function pointers). This paper explores the possibility of extending Secure Bit to protect non-control data (variables, pointers and arrays). A hardware bit, provided by Secure Bit, helps preserving
Krerk Piromsopa, Sirisara Chiamwongpaet
openaire +1 more source
Enhanced Protection Security Using the System Integrity Protection Scheme (SIPS)
IEEE Transactions on Power Delivery, 2016Events, such as faults, loss of load, or generation may cause unwanted relay operations which initiate cascade tripping leading to system collapse. Security of power system protection is a major concern for utilities. A system integrated protection scheme-based approach is proposed for improving the security of protection operations.
Pratim Kundu, Ashok Kumar Pradhan
openaire +1 more source
Out-of-step protection enhancements
Eighth IEE International Conference on Developments in Power System Protection, 2004Power systems are subjected to a wide range of small or larger disturbances during operating conditions and they are designed to survive disturbances caused by faults, loss of a large generator, or line switching. The power system typically adjusts to these disturbances and continues to operate satisfactorily and within the desired bounds of voltage ...
openaire +1 more source
Protection Functionalities in Smart Meters to Enhance Distribution System Protection
2018 IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia), 2018Penetration of Distributed Generations (DGs) has made traditional distribution protection schemes mostly ineffective. Sophisticated protection schemes cannot be implemented using fuses, reclosers and Miniature Circuit Breakers (MCBs). Limited numbers of overcurrent relays are used in distribution systems.
Asha Radhakrishnan, Sarasij Das
openaire +1 more source