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허선아,전은주 한국화법학회 2023 화법연구 Vol.- No.59
To achieve the goal of enhancing communication skills in speech education, it is important to provide an opportunity to perform actual discourse. However, in the actual school field, the opportunity to perform is limited owing to time and physical limitations. The use of metaverse was proposed to provide learners with an actual discourse performance experience while overcoming the limitations of the classroom. To this end, metaverse platforms, such as Gather.town, Roblox, ifland, ZEPETO, and ZEP, which are currently widely used in education, were classified according to the communication method: the characteristics of each platform were examined, and the educational utility of metaverse use was discussed. The metaverse space for teaching and learning conversation was envisioned in three ways: “lecture space,” “group space,” and “open space,” and the characteristics of each space and functions that can be used within the space were explained. Based on this spatial composition, we presented a four-step learning procedure of planning, preparing for discourse performance, discourse performance, and evaluation. A teaching and learning model that summarizes the main activities at each stage was developed, and applied to the discussion unit.
Diffuse-Type Tenosynovial Giant Cell Tumor of the Tendon Sheath in Both Wrists
허선아,박선영,서진원,고성혜,이인재 대한영상의학회 2021 대한영상의학회지 Vol.82 No.1
Diffuse-type tenosynovial giant cell tumor (D-TSGCT), previously known as pigmented villonodular synovitis, is a locally aggressive neoplasm that may arise from the synovium, bursa, or tendon sheath. D-TSGCT is usually monoarticular and can be classified into intra- and extra-articular forms, the latter of which is rarer. Here, we report a case of D-TSGCT in a 64-year-old female that involved the entire flexor and extensor tendon sheaths of both wrists. We describe the ultrasonography and MRI findings, as well as review the relevant literature.
허선아,김은수,이열 대한영상의학회 2020 대한영상의학회지 Vol.81 No.5
Reversible cerebral vasoconstriction syndrome (RCVS) is a clinical and radiological syndrome with primary features that include hyperacute onset of severe headache and segmental vasoconstriction of the cerebral arteries, which resolve within 3 months. Vessel wall enhancement has been reported in some cases of RCVS; however, its pathophysiological and diagnostic implications remain unclear. We review a case of RCVS in a patient with transient vessel wall enhancement on contrast-enhanced fluid-attenuated inversion recovery images, focusing on the pathophysiological and diagnostic implications.