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Coronary spasm is the major pathophysiology of vasospastic angina (VA). Medical treatment is usually effective in VA patients without significant stenosis. However, there is little information about the percutaneous coronary intervention (PCI) in VA patients with significant coronary artery stenosis (CAS).After retrospective screening of all consecutive VA patients from January 2010 to April 2015,...
In recent years, USN technology has become one of the major issues in business and academia. This paper analyzes USN services from a security point of view and proposes a security model of USN middleware that plays a bridge role in linking heterogeneous sensor network to USN applications. In USN environment, sensor networks transmit data sensed from all distributed sensor nodes to USN middleware....
With the spread of smartphones, our daily lives become more convenient. However, using smartphone has also made us to be exposed to various security threats. Especially, the number of mobile malware has been increasing with years and mobile malwares are becoming more intelligent and sophisticated. There are a lot of measures to deal with mobile malwares, but techniques evading them have also been...
With the rapid miniaturization of integrate circuit (IC) chip, wafer-level IC testing has become an important process in the semiconductor industry. The improvements of a vertical probe card allow the test to high speed and high-density devices with short probe length and fine pitch compared to conventional probe cards. Regradless these strength, signal degradation by crosstalk noise in probe card...
Wafer-level testing is an important process in integrated circuit (IC) manufacturing to enhance the yield and reduce costs. The development of a vertical probe card enables the testing of low-voltage and high-frequency devices with reduced probe lengths compared to conventional probe cards. Despite these advantages, crosstalk noise and electromagnetic interference (EMI) have alarmingly become a serious...
Because most existing smart grid models are conceptual, it is difficult to analyze in detail communication relationship between each component, such as advanced metering infrastructure, demand response, and distributed energy resources domain. Thus, in this paper, we identify more concrete services in smart grid communication with security threats and security requirements. Finally, we suggest a new...
Electromagnetic-field (EMF) noise from the only coil system with CSSR (Current source, Series resonance for TX, Series resonance for RX, and Resistive load) and CSPR (Current source, Series resonance for TX, Parallel resonance for RX, and Resistive load) topologies are featured in this paper. Wireless power transfer (WPT) system for a monitor is designed and analysed by using the equivalent circuit...
In this paper, we introduce the On-line Electric Vehicle (OLEV) system and its non-contact power transfer mechanism and propose some techniques for the reduction of electromagnetic fields (EMFs) from the power line and the vehicle itself. By applying a metallic plate shield, horizontal/vertical shield, and connecting wire for loop cancellation, the low frequency EMFs have been significantly reduced...
This paper proposes a secure mobile multicast hand-off mechanism supporting a group-key management and membership authentication for a mobile multicast member. Our group-key management creates a time-limited group key for the moved member for efficient update of a multicast group-key. Also, an old MMA (mobile multicast agent) performs the member re-authentication with a new MMA during movement from...
Countermeasures against botnet, which has been recognized as the Internet??s biggest threat, are urgently needed to create a safe Internet environment. However, the current technology lags behind the evolution of botnet, and, unlike in the past, mutual cooperation among ISPs and countries is essential. As botnet is distributed internationally rather than in a particular ISP domain, international cooperation...
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