• KSII Transactions on Internet and Information Systems (TIIS)
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• v.14 no.2
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• pp.826-840
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• 2020

Vertigo is one of the most common complaints encountered by physicians and the patients are steadily increasing. These patients are exposed to the risk of secondary accidents such as falls due to vertigo. There are two ways to improve this symptom: medication and rehabilitation. Although temporary symptomatic improvement may be expected in patients treated with medication, vertigo may recur and medication can delay central compensation. In contrast vestibular rehabilitation exploits central mechanisms of neuroplasticity to increase postural stability and enhance visual-vestibular interactions in situations that generate conflicting sensory information. However, vestibular rehabilitation may be compromised by incorrect performance of exercises, and there is a need for active effort and interest from the patient during rehabilitation. To solve these problems, we decided to apply FOVE HMD for eye-tracking and Unity3D to create virtual reality. The proposed eye-tracking based algorithm calculates the concentration of users with eye tracking data and calculates the motion width of the patient with nystagmus, thus the severity of the patient according to the score can be determined. According to our experimental test against healty group and patients group, this result showed the meaningful data to use define the contents result.

• Proceedings of the Korea Information Processing Society Conference
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• 2019.05a
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• pp.678-681
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• 2019

어지럼증은 모든 사람들이 일상생활에서 겪는 가장 흔한 질병 중 하나이다. 이러한 어지럼증은 주로 전정 기관의 약화 및 충격으로 인한 다양한 원인에 의해 유발되며 전정 재활을 통해 회복 될 수 있다. 전정 재활은 다양한 형태로 존재하지만 모든 사람을 위해 수행 할 수 있는 보편적 인 방법으로 훈련의 목적은 눈, 머리 및 균형 운동을 통해 전정 기관을 반복적으로 운동하는 것이다. 그러나 이러한 재활은 지루하고 흥미가 없으므로 환자가 계속 훈련을 하고 제대로 수행하고 있는지 확인하는 것이 어렵다. 이러한 문제점을 해결하기 위해 본 연구에서는 Unity3D 및 FOVE HMD를 사용하여 재미있고 평가 가능한 가상 현실 전정 재활의 내용을 구현했다.

• Korean Journal of Plant Resources
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• v.11 no.1
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• pp.70-79
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• 1998

This study was conducted to understand the effects of weather and tapping date on yield and quality of lactree(Rhus verniciflua) sap yield showed a significant positive correlation with the minimum temperature of one day before sap collection at 1% level and with theminimum humidity of theday of sap collection at 5% level. However, the differences between the maximum and the minimum temperatures and humidities of the day of sap collection were negatively correlated with the sap yield at 5% level. Multiple regression analysis indicated that the minimum temperature of one day bofore sap collection and the minumum humidity of the day sap collection were important factors for increasing sap yield. The high sap yield of lactree by Japanese tapping method was recorded during mid-July and early August. Seasonal variation in lactree sap constituents was observed. The sap collected on 15th of August contained the highest urushiol content (68.3%) and the lowest water content resulting in high quality of lactree sap. By reversed-phase HPLC analysis, fove urushiol components were separated from each other depending on the number of doulbe bonds in the side-chain , and seaxonal variation of urushiol composition was noticed. The 3-C15 triene content fo the sap collected on 5th of July was the highest(77.56%) indicating the major component of urushiol which affects lactree sap quality.