• 정보처리학회논문지B
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• 제19B권2호
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• pp.77-82
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• 2012

본 논문에서는 다양한 생체신호 중 영상 및 음성 신호에 대한 분석 파라메터들을 적용한 실험 방법을 통해 폐 수혈 상응점 자극에 따른 효과성을 입증하는 연구를 수행하였다. 이를 위해 20대 남성 25명을 대상으로 폐와 연관된 수혈 상응점 자극 전과 후의 얼굴 영상 및 음성을 수집하였다. 또한, 수집된 자료를 기반으로 한의학적 진단 이론에서 제시하고 있는 폐와 관련된 우측 뺨 영역의 색상 변화와 음성 에너지 크기 및 발화속도의 변화를 측정, 분석하였다. 결과적으로 폐 수지침 요법을 수행한 후에 우측 뺨 영역의 L값이 평균 2.33감소하였으며 a값과 b값이 평균 0.76, 0.97증가하였다. 또한, 음성에너지 크기는 평균 0.42증가하였으며 발화속도는 평균 0.07감소하였다. 즉, 폐 수지침 요법을 통해 폐 기능이 향상되는 효과를 나타낸 것으로 분석되었다.

• Imaging Science in Dentistry
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• 제37권2호
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• pp.65-68
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• 2007

Purpose: To compare the leakage and scattered radiation from hand-held dental X-ray unit with radiation from fixed dental X-ray unit. Materials and Methods: For evaluation we used one hand-held dental X-ray unit and Oramatic 558 (Trophy Radiologie, France), a fixed dental X-ray unit. Doses were measured with Unfors Multi-O-Meter 512L at the right and left hand levels of X-ray tube head part for the scattered and leakage radiation when human skull DXTTR III was exposed to both dental X-ray units. And for the leakage radiation only, doses were measured at the immediately right, left, superior and posterior side of the tube head part when air was exposed. Exposure parameters of handheld dental X-ray unit were 70 kVp, 3 mA, 0.1 second, and of fixed X-ray unit 70 kVp, 8 mA, 0.45 second. Results: The mean dose at the hand level when human skull DXTTR III was exposed with portable X-ray unit $6.39{\mu}Gy$, and the mean dose with fixed X-ray unit $3.03{\mu}Gy$ (p<0.001). The mean dose at the immediate side of the tube head part when air was exposed with portable X-ray unit was $2.97{\mu}Gy$ and with fixed X-ray unit the mean dose was $0.68{\mu}Gy$ (p<0.01). Conclusions: The leakage and scattered radiation from hand-held dental radiography was greater than from fixed dental radiography.

• Journal of Yeungnam Medical Science
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• 제22권1호
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• pp.96-103
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• 2005

뇌성마비로 인해 오른 손에서 단부전마비를 호소하는 환자를 대상으로 기능적 자기공명영상 장치와 경두개 자기 자극기를 사용하여 운동신경의 회복기전을 연구하였다. 대상자는 21세 된 남자 환자로 오른손에 경미한 운동 기능의 손상을 보였고, 자기공명영상의 소견에서 좌반구의 precentral knob에서 병변을 보였다. 기능적 자기공명영상 촬영은 한 명의 대상자와 여덟 명의 정상인을 대상으로 표준화된 헤드코일을 사용하여 1.5 T의 장치에서 BOLD 기술을 적용하여 실시하였다. 대상자들의 운동 수행은 1 Hz 주기로 손가락의 굴곡과 신전을 반복하는 과제가 제시되었다. 경두개 자기 자극은 원형 코일을 사용하여 코일의 앞쪽 부분이 대상자의 두피에서 1 cm 정도 떨어진 정접 부위에 적용되었고 양측의 짧은엄지벌림근에서 발생된 운동 유발 전위가 동시에 측정되었다. 자기공명영상의 결과에서 환자의 비손상측(좌측) 손과 정상군의 좌측 손의 운동 수행 시 오른쪽의 일차운동감각영역(SM1)의 precentral knob에서 활성도가 나타났다, 그러나, 환자의 손상측(우측) 손의 운동 수행 시, 좌측 일차운동감각영역의 손상된 precentral knob 내측 부위에서 활성도를 보였다. 또한, 경두개 자기 자극의 결과에서 손상측 짧은엄지벌림근에서 발생된 운동 유발 전위에 해당하는 뇌 부위가 환자의 정상측과 비교하여 1 cm 내측에서 발견되었다. 그러므로 손상측 손의 운동 기능이 손상된 precentral knob의 내측 부분으로 전위되어 신경재구성이 이루어진 것으로 추정되는 결론을 얻었다.

• 대한인간공학회지
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• 제24권4호
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• pp.15-21
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• 2005

Use of a glove made of materials with a low elasticity decreases the performance of the hand such as agility, dexterity, range of motion, and grip strength. The present study examined if the adverse effects of a low-elastic glove can be reduced by a design which accommodates the changes of hand surface lengths by hand motion. Two glove designs which provide patches of elastic cloth and pleats at the finger joints and knuckle were developed by considering the hand surface length changes, and then compared with two conditions(bare hand and conventional glove design that does not consider the dynamic characteristics of the hand dimensions) in terms of completion time in peg board insertion task, maximum grip strength, discomfort in hand motion, discomfort in force exertion, and overall discomfort by 24 right-handed participants. The test results confirmed that wearing of a glove significantly reduced the agility and grip strength capability of the hand and indicated that the novel designs were effective to lessen the performance decreases compared to the conventional design. Also, of the glove designs, the pleat glove design was found most preferred for both better hand performance and less subjective discomfort.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제4권4호
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• pp.618-632
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• 2010

This paper presents a novel approach to control the augmented reality (AR) objects robustly in a marker-less AR system by fingertip tracking and hand pattern recognition. It is known that one of the promising ways to develop a marker-less AR system is using human's body such as hand or face for replacing traditional fiducial markers. This paper introduces a real-time method to manipulate the overlaid virtual objects dynamically in a marker-less AR system using both hands with a single camera. The left bare hand is considered as a virtual marker in the marker-less AR system and the right hand is used as a hand mouse. To build the marker-less system, we utilize a skin-color model for hand shape detection and curvature-based fingertip detection from an input video image. Using the detected fingertips the camera pose are estimated to overlay virtual objects on the hand coordinate system. In order to manipulate the virtual objects rendered on the marker-less AR system dynamically, a vision-based hand control interface, which exploits the fingertip tracking for the movement of the objects and pattern matching for the hand command initiation, is developed. From the experiments, we can prove that the proposed and developed system can control the objects dynamically in a convenient fashion.

• 대한두개안면성형외과학회지
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• 제21권3호
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• pp.188-192
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• 2020

The most common forms of nonmelanocytic skin cancer (NMSC) are basal cell carcinoma (BCC) and squamous cell carcinoma (SCC). The growing incidence of skin cancer in the Republic of Korea has sparked increasing scientific interest in these types of tumors. In the case described herein, multiple NMSCs occurred asynchronously in various areas of the body in a single patient. A 67-year-old man presented with an ulcerative lesion on the right retro-auricle and multiple keratinized masses on the back and face. The right retro-auricular lesion was diagnosed as BCC, and the keratinized masses on the patient's back and face were diagnosed as SCC. He subsequently presented with numerous pigmented skin lesions on the forehead, temple, pre-auricle, neck, right forearm, right hand, and both thighs. One lesion on the neck was diagnosed as BCC, and five lesions on the right hand and forearm were diagnosed as SCC. The patient was also diagnosed with supraglottic SCC and external auditory canal SCC. An otolaryngologist performed radical excision of the primary SCC. Suspected skin cancer lesions observed on the face and both ears were diagnosed as SCC. Patients with multiple NMSCs are at an elevated risk for additional skin cancers, making periodic follow-up important; furthermore, all suspicious lesions should be biopsied.

• 한국운동역학회지
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• 제32권4호
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• pp.111-120
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• 2022

Objective: This study investigated the effect of pelvic tiltng according to the paralytic side on gait in stroke patients during a 10 m functional movement timed up and go (TUG) test. Method: In this study, gait parameters were measured using a gait analyzer for 20 stroke patients and their gait was analyzed during a 10 m TUG test. For statistical analysis, an independent sample t-test were performed for age, height, and weight among general characteristics of subjects and homogeneity was tested by performing a chi-square test for gender, paralysis side, period of onset, and K-MMSE score. In order to understand the relationship between each variable, Pearson correlation analysis was performed on the variables. Results: First, the right-hand paralyzed group showed correlations in cadence and gait velocity in the up and down tilt of the pelvis, and the left-hand paralyzed group showed correlations in cadence and step length in the anterior and posterior tilt of the pelvis. Second, the tilt of the pelvis was correlated with the Sit to stand, walk forward, walk backwards, turn around at the end point, sit on a chair and the total TUG time in the right hemiplegic group compared to the left hemiplegic group. Conclusion: In this study, a significant correlation was confirmed as a result of gait analysis of right-handed stroke patients divided into a right paraplegic group and a left paraplegic group. In the future, it is suggested that treatment for improving gait of stroke patients should be treated differently for the right and left paralyzed side.

• 한국운동역학회지
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• 제12권1호
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• pp.115-124
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• 2002

The purpose of this study is to analyze the ground reaction force of arm landing on arm and leg during sports aerobics. Subjects of this study were total 10 players of 5 males and 5 females who have are domain sports aerobics medalists more than the third place in national tournaments. The subjects jumped between the two ground reaction force analyzers, while landing their right hand on the front platform(#1) and their right leg on the rear platform(#2), and the data frequency was set to 200Hz. Findings of this study are as follows; More than 3 times of impact peak force of vertical reaction force acted on arm joint than on leg joint. And, when ground reaction force on foot increased, ground reaction force on hand decreased. 3 impact peaks of curve of ground reaction force were found - Impact Peak 1 incurred on the time the palm lands on the ground, Impact Peak 2 absorbing shock secondarily on wrist joint, and Active Peak incurred on the time of holding the weight while pushing out the severly bent elbow joint.

• 한국전자파학회:학술대회논문집
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• 한국전자파학회 2005년도 종합학술발표회 논문집 Vol.15 No.1
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• pp.297-302
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• 2005

Right hand circularly polarized Ka band microstrip patch array antenna was designed, manufacture and measurement were carried out. In order to lower axial ratio performance sequential rotation array technique was used. With mono-pulse feed There are sum and delta channel. Waveguide to microstrip transition was used. The 512 array antenna was performed which axial ratio is about 1.ldB in the half power beam width and also 1.ldB at the normal direction. Directivity gain of designed antenna is 32dB.

• Annals of Clinical Neurophysiology
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• 제2권2호
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• pp.130-134
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• 2000

저자들은 최근 글을 쓰는 자세에서는 진전이 나타나지 않고 글을 쓸 때에만 진전이 나타나는 전형적인 원발성 진전 A형을 경험하였기에 이를 보고하며, 본 증례를 통해 원발성 서자진전 A형은 표현 양상으로는 서로 다르나 병태생리적으로 서자경련과 유사한 질환임을 추정해 볼 수 있었다.