The advance of information technology with governmental support allows researchers to utilize big data to conduct rigorous rehabilitation-related studies in both the United States and Korea. While big data research has been actively conducted in the United States, few Korean rehabilitation scientists currently conduct big data research. In this paper, we discuss the existing rehabilitation-related big data in Korea and introduce the current big data research trends in the United States. In addition, we provide potential research areas by discussing the previous big data studies in the United States, including 1) functional outcomes, 2) geographical variation, 3) linkage of a population-based cohort to hospital data, 4) cross-national comparison, and 5) scale development. We also discuss various statistical methods required in big data research and compare how these methods differ compared to the traditional research methods in rehabilitation research. Lastly, we discuss the importance of workforce development in rehabilitation-related big data research. We hope this paper will provide occupational therapy scientists and clinicians with practical and useful information about big data research and accelerate big data rehabilitation research communities in Korea.

The compatibility of exchange data has been the problem of CAD/CAM systems since the very beginning. National and international organizations have addressed the issue through development and release of standards for the exchange of geometric and non-geometric design data. CAD/CAM vendors are in charge with the task of interpreting and implementing these standards into their products. This paper explores an area of CAD/CAM systems development, which deals with effective exchange standards translators’ implementation. We introduce the new approach, which proposes to enclose all the translation operations concerning each exchange format to a separate DLL, thus making a “plug-in.” Later this plug-in could be used together with the CAD/CAM system or with specialized translation software. This approach allows rapidly creating new translators and gaining the reliable, high-efficiency, and, what is important, reusable program code. All examples come from the authors’ practice experiences of dealing with CAD/CAM systems.

The accuracy of rotation of spindle unit could be defined as the stability of its spindle axis while rotating. The rotation in the rolling bearings causes the disturbing influence, which leads to the oscillation of a rotation axis. The main source of oscillation is the interaction between rolling bodies and rings’ races. The first oscillation source investigated was the out-of-shape imperfection of inner bearing ring. It was shown that it is possible to considerably decrease the radial runout of spindle if we can orient the inner rings in such a manner that oscillations caused by them would mutually compensate each other. Also the outer ring harmonics were explored as the second oscillation source. It was found that it is possible to reduce the runout by making the oscillation antiphased by mutually adjusting position of bearings on assembly stage.