Learn More
Security concerns are becoming increasingly critical in networked systems. Firewalls provide important defense for network security. However, misconfigurations in firewalls are very common and significantly weaken the desired security. This paper introduces FIREMAN, a static analysis toolkit for firewall modeling and analysis. By treating fire-wall(More)
Sampling techniques are widely used for traffic measurements at high link speed to conserve router resources. Traditionally, sampled traffic data is used for network management tasks such as traffic matrix estimations, but recently it has also been used in numerous anomaly detection algorithms, as security analysis becomes increasingly critical for network(More)
— Packet sampling is commonly deployed in high-speed backbone routers to minimize resources used for network monitoring. It is known that packet sampling distorts traffic statistics and its impact has been extensively studied for traffic engineering metrics such as flow size and mean rate. However, it is unclear how packet sampling impacts anomaly(More)
Current works on BGP anomaly detection require extensive processing on collected routing data. Consequently, these techniques are limited to offline post-processing which has restricted applicability. In this work, we propose an BGP anomaly detection mechanism that requires only a simple count of BGP UPDATE messages collected over a certain period. We first(More)
Time perception deficit has been demonstrated in children with attention deficit hyperactivity disorder (ADHD) by using time production and time reproduction tasks. The impact of motor demand, however, has not yet been fully examined. The current study, which is reported herein, aimed to investigate the pure time perception of Chinese children with ADHD by(More)
Traffic sampled from the network backbone using uniform packet sampling is commonly utilized to detect heavy hitters, estimate flow level statistics, as well as identify anomalies like DDoS attacks and worm scans. Previous work has shown however that this technique introduces flow bias and truncation which yields inaccurate flow statistics and ''drowns out(More)
This study investigates the cerebral hemodynamic changes during a routine sleep-deprived video-electroencephalogram (SD-VEEG) in healthy children. Forty-two children with normal intelligence were examined. The children were 5-14 years of age, and their electroencephalograms (EEGs) were within the normal range. Each subject was deprived of a routine night's(More)
OBJECTIVE To investigate the characteristics of motor unit recruitment and coordination function of the wrist during maximum isometric voluntary contraction (MIVC) using surface electromyography (EMG) in children with hemiplegic cerebral palsy (CP). DESIGN A cross-sectional trial. SETTING Hospital neurology and rehabilitation department. PARTICIPANTS(More)
Although the ATM Forum has proposed the Private Network±Network Interface (PNNI) speci®cation to facilitate routing in ATM networks, path selection or routing algorithms that guarantee users' multiple Quality of Service (QoS) requirements remain an open issue since the PNNI protocol only provides a routing framework and does not standardize on a method of(More)
  • 1