The visual inspection device was developed for non-destructive test of piping from the inside. The developed components of the system can be classified as camera module, main body module named crawler module and system module. Because the system has driving part as electric motors, it can run not only the horizontal and vertical straight lines but also bend lines. The system has video processors, it can make it possible to display the video on the monitor and to save the video clips simultaneously. Several tests were performed to check the development objectives.

A safety lancet was developed in this study. The development process consists of a conceptual design, mock-up tests, performance evaluation, verification, validation for medical device certification and mass production preparation. It is designed as a single unit which makes it possible to use more convenient. It is also designed as disposable product which cannot be reused or recycled structurally. The developed safety lancet can prevent the secondary infection by needle stick injury or reuse. Biocompatibility and physico-chemical characteristics were passed in KTL(Korea Testing Laboratory). Validation of gamma sterilization of packing materials was passed in professional company for mass production.

The electric flexible videoscope was developed. The developed components of the videoscope are insertion tube, 360 degrees full articulation tip with joystick control, detachable probe part, camera module equipped with CMOS sensor and adjustable high-intensity white LED light sources. The insertion tube can have strong torsional rigidity from the components of spiral spring and tungsten mesh tube. The handset with joystick control makes it possible to manipulate the videoscope tip articulation in 360 degrees of all directions easily. Over 90 degrees of bending angle measured from the straight camera probe makes it possible to inspect the surface of side wall. The detachable probe model can separate insertion tube with probe. It is useful to select proper length of insertion tube. Several tests were performed to check the development objectives.

Three-dimensional motion analysis systems and force plates are used for gait phase detection and ground reaction force(GRF) or ground reaction moment(GRM) data collection. But force plates as measurement systems are restricted to laboratory environments and have limitations for abnormal walking with foot dragging. Therefore the methods were proposed to compute the GRM from the kinematic data of three-dimensional motion analysis systems. Gait phase detection with kinematic data using foot velocity algorithm(FVA) was performed. The validity of gait phase detection was obtained comparing with the results of force plates. A gait model with 7 segments was composed to compute GRM. The results of gait model with kinematic data were compared with those of force plates. The result of the vertical direction is similar. But anterior-posterior direction and lateral direction show similar tendency with some gaps.

In order to select the supporting points for large glass panels used for TFT-LCD monitors, an optimization method selecting the supporing points is presented. In this method we reduce the problem of 1 degree of freedom. ANSYS optimization module is used and optimization criterion is to minimize the maximum deflection.

We assessed whether the use of a symmetrical upper limb motion trainer in daily repetitive training for a 6-week period reduced spasticity and improved motor function in three chronic hemiparetic patients. Upper limb motor impairment and disability were measured by the Fugl-Meyer Assessment (FMA), Modified Ashworth Scale (MAS) and Manual Muscle Test (MMT), respectively. The electromyography (EMG) of the affected hand was recorded during isometric wrist flexion and extension. In all patients, FMA and MMT scores were significantly improved after the 6-week training. However, MAS scores of the affected wrist spasticity did not change considerably. Onset and Offset delays in muscle contraction significantly decreased in the affected wrist. The co-contraction ratio of flexor and extensor muscles significantly increased after the 6-week training. Onset and offset delays of the muscle contraction and co-contraction ratio correlated significantly with the patients' FMA. This study showed that repetitive, symmetric movement training can improve upper limb motor functions and abilities in chronic hemiparetic patients. Also, the EMG assessment of motor response is likely to provide insights into mechanisms and treatment strategies for motor recovery in chronic hemiparetic patients.