Search

Jaw motion tracking, which is introduced in recent case reports, is a method which records the patient’s individualized pathway of the mandibular movements along with facebow transfer, and reproduces the information in the virtual space of computer-aided-design/computer-aided-manufacturing (CAD-CAM) software. In this present case, a collapse of the occlusal plane was observed, due the loss of posterior teeth for a long period. Full-mouth rehabilitation with an increase in the occlusal vertical dimension was planned. First, the patient’s mandibular movements were recorded on the newly established jaw relation by jaw tracking, and this information was assembled with the patient’s intraoral data to create a virtual patient. Implant planning and diagnostic wax-up was done on the virtual patient, leading the fabrication of the provisional prosthesis. On the newly established jaw relation with an increase in the occlusal vertical dimension, canine guidance of the provisional prosthesis was checked. Finally, the provisional prosthesis was carried out to the definitive prosthesis. Using the advantages of the technologies in the digital dentistry, the patient was satisfied with the function and the esthetics after the treatment. [ABSTRACT FROM AUTHOR]

The condition-based maintenance system(CBMS) is a technology to improve the survivability and operational performance of naval ships. It monitors the condition of major equipment (propulsion system, power system, etc.) and performs functions such as displaying trends through performance evaluation, generating alarm conditions, fault diagnosis, and predicting remaining life. This paper studies ways to increase the accuracy and efficiency of machine learning model design for abnormal diagnosis of Naval propulsion system equipment. The Random Forest and Support Vector Regression(SVR) models used in overseas cases and the XGBoost and Light GBM models, which are most commonly used in various fields, were used to calculate the normal prediction values(Baseline) based on actual operational naval ship propulsion system equipment, and performed condition diagnosis through comparison with real-time measurements. Then, the performance of each regression model was compared and analyzed through RMSE, R2 Score, and learning time. [ABSTRACT FROM AUTHOR]

In this study, an ultra-wideband cavity-backed four-arm sinuous antenna with low height and wide gain bandwidth is proposed. To reduce the antenna height, a feeding structure is applied with a coaxial bundle and two-port balun. In addition, a multi-layer radio absorber and metallic cavity are applied to obtain certain characteristics, such as a unidirectional radiation pattern, low profile, and stable reflection coefficient. Additionally, a radiator with low input impedance is applied for a wide gain bandwidth. The proposed antenna operates at 0.4～6.0 GHz and has a relatively low height and large gain bandwidth compared to the performance of previously studied antennas. [ABSTRACT FROM AUTHOR]