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We fabricated 8Mb 1T-1MTJ STT-MRAM macro embedded in 28nm CMOS logic platform by developing novel integration/stack/patterning technologies. MTJ memory cell array was successfully embedded into Cu backend without open fail and severe degradation of magnetic property. Advanced perpendicular MTJ stack using MgO/CoFeB was developed to show high TMR value of 180% after full integration. In addition, ion...
Real-time capturing of a color image and depth map from an arbitrary scene is very crucial in various applications such as robotics, automotive, augmented reality, and interactive gaming, because it enables electronic devices to recognize and track target objects without complicated post-processing. Numerous color image sensors have been developed, pushing small-size and high-sensitivity pixels [1,2];...
Partial differential equations (PDEs) pose a challenge for control engineers, both in terms of theory and computational requirements. PDEs are usually approximated by ordinary differential or partial difference equations via the finite difference method, resulting in a high-dimensional state-space system. The obtained system matrix is often symmetric, which allows this high-dimensional system to be...
In this research, we present a development of a mobile robot platform integrated with off-the-shelf sensors and equipment for disaster response. Unlike the applications including research and education or military and civil defense forces, it is expected that the platform can be utilized for practical use with small initial budget and less effort for development. The platform offers an opportunity...
The rate of increase in the number of aging population in Korea is very rapid among OECD-member countries. And fall accident is one of the most common factors that threaten the health of the elderly. Therefore, it is needed to develop a fall detection system for the elderly. Most fall detection systems use accelerometers attached on the torso. And in various studies, it was verified that these systems...
Motion sensing devices enable users to interact with large virtual workspaces with small screens since relative motion can be an effective navigation technique to access off-screen contents. This paper proposes a cost-effective orientation sensing technology for pan-tilt motion interfaces of a mobile device, utilizing only a tri-axis accelerometer and a dual-axis angular rate sensor.
A solution to the coverage problem in wireless sensor networks provides the total number of sensors that are required to cover a given area of deployment. While prior studies have proposed different formulations and solutions to this problem, these studies have not addressed the problem of minimum cost coverage in which full coverage is achieved by using the minimumnumber of sensor nodes for an arbitrary...
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