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High field MRI makes it possible to obtain images of non-proton (X) nuclei due to its increased sensitivity. A double-resonant coil can provide both images of X nucleus and proton without the need to reposition the patient. Most double-resonant coils use lossy trap circuits to minimum interactions between X nucleus and H nucleus. In this study, we propose a hybrid sodium/proton double-tuned transceiver...
Transmit/receive MTL (Microstrip Transmission Line) array has been widely used for ultra-high-field MRI because of its low mutual coupling characteristics. However, several design issues such as limit to the length of a single coil element still remains. For traditional MTL coils, two capacitors (one fixed, one variable) were put at both ends of the coil element for tuning. Based on our experimental...
The Multichannel Coherent Radar Depth Sounder (MCoRDS) system was developed by the Center for Remote Sensing of Ice Sheets (CReSIS) to map the thickness of ice sheets. This radar system was used in Antarctica as one of the primary sensors for NASA's Operation Ice Bridge (OIB) during the fall of 2009. Compared to its predecessors, MCoRDS features several new capabilities which enabled it to successfully...
We design and implement a Mandatory Access Control (MAC) system in distributed virtual computing environment, named DVM-MAC, aiming to provide distributed trust through enforcing MAC policies. In DVM-MAC, Prioritized Chinese Wall (PCW) model is implemented to control potential covert channels between VMs in both single node and distributed environment. A policy enforcement module locates inside Xen...
Super long integers which are outside the confines of numbers defined in existent program language compilers or interpreters are widely employed in cryptographic applications. The paper designs 10 algorithms, which almost all address operands by the byte, and are used for the operation of unsigned super long integers, including conversion, shift, comparison, addition, subtraction, multiplication,...
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