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      • 정신지체아 상지의 운동능력과 편측성 발달의 연구

        김상수 대구보건대학 1996 대구보건대학 論文集 Vol.16 No.-

        The purpose of this study is to investigate the relationship between the development of laterality and bilateral motor abilities measured with respect to various rhythm movements in upper extremity of mentally retared children. The development of laterality was measured by a survey of dominace-hand. The bilateral motor abilities were assessed by means of a tentative rhythm beat test of hands. One hundred sixty eighty subjects with special education needs shose age ranged from 7 to 18 years old were used for an experimental group. Fity nine normal children whose age ranged from 3 to 6 years old were also chosen as a control group. The major findings were as follows : (1) The development of lateral dominace-hand in mentally retared children differed from that of normal subjects with an increase in chronological age ; the mean level of the normal children. Though normal children establish a dominance-hand by ths age of years old, meatally retarded children are likely to show 57 percent of normal development at the age of 7 through 9 years old and 65 percent of normal development at the age of 16 through 18 years old. (2) A greater delay in mentally retarded children was found through a rhythm test which was development to assess bilateral motor abilities in upper extremity. A closer relationship betwin chronological age and the development of bilateral motor abilities in mentally retared children was found. (3) In view of these findings, it was indicated that bilateral motor abilities of the retarded and non-retarded children were significantly correlated to the acqusition of dominance-hand.

      • 스케일간 웨이블릿 계수 절대치의 선형 모델링을 이용한 영상 보간

        김상수,엄일규,김유신,Kim Sang-Soo,Eom Il-Kyu,Kim Yoo-Shin 대한전자공학회 2005 電子工學會論文誌-SP (Signal processing) Vol.42 No.6

        웨이블릿 영역에서의 영상 보간은 웨이블릿 계수들의 통계적 특성과 스케일간 의존성을 표현하는 확률모델을 이용한다. 본 논문에서는 보간할 영상에 대해 스케일간 웨이블릿 계수의 절대치를 선형 모델링하여 분산을 추정하고 이를 바탕으로 고주파 부대역의 확률모델을 실현하여 영상을 보간하는 방법을 제안한다. 본 논문의 방법은 확률 모델에 대한 추정된 파라미터에 의해 웨이블릿 계수를 난수 형태로 발생시키는 방법을 사용한다. 확률모델을 따라 난수를 발생할 경우 추정 부대역에 난수에 의한 잡음이 발생하게 된다. 본 논문에서는 후처리 과정으로 Wiener filter를 사용하여 부대역의 잡음을 제거하였다. 제안 방법으로 외삽한 부대역에 대한 확률 밀도함수를 비교적 정확하게 추정한 것을 볼 수 있다. 실험을 통해 제안방법이 bicubic과 같은 전통적인 방법뿐 아니라 웨이블릿 영역에서의 다른 영상보간법보다 나은 주관적, 객관적 성능을 가지고 있음을 보였다. Image interpolation in the wavelet domain usually takes advantage of the probabilistic models for the intrascale statistics and the interscale dependency. In this paper, we adopt the linear model for the absolute values of wavelet coefficients of interpolated image across scale to estimate the variances of extrapolated bands. The proposed algorithm uses randomly generated wavelet coefficients based on the estimated parameters for probabilistic model. Random number generation according to the estimated probabilistic model may induce the 'salt and pepper' noise in subbands. We reduce the noise power by Wiener filtering. We observe that the proposed method generates the histogram of the subband coefficients similar to the that of original image. Experimental results show that our method outperforms the previous wavelet-domain interpolation method as well as the conventional bicubic method.

      • KCI등재후보
      • SCOPUSKCI등재

        졸-겔 법으로 성장시킨 Nb가 첨가된 Bi<sub>4</sub>Ti<sub>3</sub>O<sub>12</sub> 박막의 미세구조와 전기적 성질

        김상수,장기완,한창희,이호섭,김원정,최은경,박문흠,Kim, Sang-Su,Jang, Ki-Wan,Han, Chang-Hee,Lee, Ho-Sueb,Kim, Won-Jeong,Choi, Eun-Kyung,Park, Mun-Heum 한국재료학회 2003 한국재료학회지 Vol.13 No.5

        Bismuth layered structure ferroelectric thin films, $Bi_4$$Ti_3$$O_{12}$ / (BTO) and Nb-doped BTO (BTN) were prepared on the Pt(111)/Ti/$SiO_2$/Si(100) substrates by a sol-gel route. We investigated the Nb-doping effect on the grain orientation and ferroelectric properties. $Nb^{5+}$ ion substitution for $Ti^{4+}$ ion in perovskite layers of BTO decreased the degree of c-axis orientation and increased the remanent polarization (2Pr). The fatigue resistance of Nb-doped BTO thin film was shown to be superior to that of BTO, and the leakage current of Nb-doped BTO thin film was decreased about 1 order of magnitude compared with BTO. The improvement of ferroelectric properties with $Nb^{5+}$ doping in BTO could be attributed to the changes in space charge densities and grain orientation in the thin film.

      • 주관절 외측 상과염 환자에게 타진형 마사지 건(percussive massage gun) 요법 적용에 따른 통증 조절 효과 분석

        김상수,주성범 한국체육무용과학회 2021 Journal of Sport and Dance Science Vol.1 No.1

        본 연구는 주관절 외측 상과염 환자에게 타진형 마사지건 요법을 적용에 따른 통증 조절 효과를 분석하 고자 하였으며, 이에 다음과 같은 결론을 얻었다. 타진형 마시지 건을 적용한 실험군에서는 현재 통증지수 에서 유의한 감소가 나타났으며(p<.05), 통증 조절 만족도에서는 유의한 증가가 나타났다(p<.05). 통제군에서 는 전 항목에서 유의한 차이가 나타나지 않았다. 이처럼, 본 연구를 통해 주관절 외측 상과염 환자에게 타 진형 마사지건 적용은 통증 감소에 효과적이며, 더불어 통증 조절 만족도가 높은 것을 확인할 수 있었다. 타진형 마시지 건의 적용은 통증조절 효과와 환자 스스로 압을 조절하고, 장소와 시간을 구애받지 않고 적용할 수 있다는 장점을 고려한다면, 주관절 외측 상과염 관련 환자들의 통증조절을 위한 유용한 보존적 치료방법으로 적극 활용할 수 있을 것이다. 또한, 본 연구결과는 주관절 상과염 환자의 근골격계 통증조절 을 위한 타진형 마사지 건 적용의 스포츠의학적 근거를 마련했다는 점에서 의미를 가질 것이다. Objectives This study analyzed the pain control effect of applying percussive massage gun therapy to patients with lateral epicondylitis. This is expected to be an opportunity to provide lateral epicondylitis patients with a self-therapy solution for pain control. The study results will also be evaluated as meaningful study data in public health related to elbow joint pain in the musculoskeletal system. Methods This study targeted 20 racket sports club members who complained of lateral epicondyle pain and functional decline. They were randomly allocated into a control group (10 people) and an experimental group (10 people). Percussive massage gun therapy was applied to the experimental group for eight weeks. The treatment was applied to the extensor carpi radialis of the elbow joint, antebrachial muscles, and the fascia of all parts of the forearm muscles. The usage time was between 30 minutes to 2 hours. Pain reduction was analyzed using a 5-point Likert scale for present pain intensity and a 4-point Likert scale for satisfaction with pain control. Paired t-tests were carried out to compare each group’s pre- and post -application scores using the SPSS 23.0 statistical program with the significance level set to 0.05. Results The experimental group showed significant present pain intensity in the pre- and postapplication analysis (t=6.400, p=0.000) and the satisfaction with pain control was significantly high (t=-5.547, p=0.001). However, no significant change was confirmed in the control group. Conclusions This study confirmed the pain control effect of percussive massage guns on patients with lateral epicondylitis. Because patients can control the massage pressure level and they can use the massage gun regardless of time and place, percussive massage guns can be actively used as a useful conservative care method for pain control in patients with lateral epicondylitis.

      • KCI등재

        뇌동정맥성기형의 방사선학적고찰

        김상수 대한영상의학회 1991 대한영상의학회지 Vol.27 No.6

        A Study of 33 patients with intracranial arteriovenous malformations were done to analyze the relationship between the size of the nidus and the type of arteriovenous malformation, the pattern of hemorrhage, and secondary findings. The diagnosis was established by means of cerebral angiography, which in all cases showed the type and size of the nidus, feeding arteries, and draining veins. In 31 cases, computed tomography was used for the evaluation of hemorrhagic patterns and other findings. Among the findings of computed tomography, the hyperdense lesion on the precontrast scan was most frequently(51.6%) noted. Among the hemorrhagic patterns intracerebral hemorrhage was the most common. Other findings such as mass effect by the hematoma, perilesional low density and calcifications were occasionally noted. The most frequent size was the medium size between 2-4cm. All AVM nidus were of the plexiform type. Intracranial arteriovenous malformation were fed most frequently from the middle cerebral artery and drained in to the surface veins. The associated diseases were thromboses(2 cases)and an atherosclerotic occlusion(1 case) of the common carotid artery, Moyamoya disease(1 case) and an aneurysm of the basilar artery(1 case).

      • KCI등재

        야외계통의 점박이응애(Tetranychus urticae)에 대한 살비제 혼합의 연합독작용

        김상수,김도익,이승찬 한국응용곤충학회 1993 한국응용곤충학회지 Vol.32 No.2

        야외계통 점박이응애에 대한 amitraz와 bifenthrin, propargite, fenbutatin oxide, dicofol을 여러 비율로 혼합하여 연합독작용을 시험한 결과, 살비제 혼합에 의한 협력작용은 살비제 조합 또는 그들의 혼합비율에 따라 큰 차이가 있었다. 모든 약제조합에서 협력작용이 나타나, amitraz와 bifenthrin의 혼합에서 2:8, amitraz와 fenbutatin oxide의 조합에서 8:2, amitraz와 propagite의 혼합에서 4:6 그리고 amitraz와 dicofol의 조합에서는 6:4의 비율에서 최대의 협력 효과를 나타내었다. These sutdies were conducted to investigate the joint toxic action of mixtures of several acaricides including amitraz, bifenthrin, propargite, fenbutatin dxide and bxide dicofol to the field-collected strian of Tetranychus urticae. The synergistic action of acaricidal mixtures was greatly varied with the kind of acaricide combinations and their mixture ratios. The combinations of amitraz with each of the tested acaricides were synergized at the given mixture ratios. The higher synergistic action in the each combination was observed at 2 : 8 ratio of amitraz and bifenthrin, 8 : 2 ratio of amitraz and fenbutatin oxide, 4 : 6 ratio of amitraz and propargite and 6 : 4 ratio of amitraz and dicofol.

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