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조음음운장애아동과 일반아동의 음운표상 내적 인식능력 비교
정일권(Il Kwon Jung),최선영(Sun Young Choi),하지완(Ji Wan Ha) 한국언어청각임상학회 2015 Communication Sciences and Disorders Vol.20 No.1
배경 및 목적: 본 연구에서는 구어 입력과 출력이 동시에 요구되는 기존의 음운인식과제의 한계점을 극복하고 화자의 장기기억 속에 저장되어 있는 음운표상에 접근하여 이에 대한 말소리 구조를 조작하는 능력을 평가할 수 있도록 '음운표상 내적 인식과제'를 고안하여 조음음운장애아동과 일반아동 간 수행력을 비교해봄으로써, 조음음운장애아동의 말처리과정에 나타나는 음운인식의 문제에 접근해 보고자 하였다. 방법: 음운표상 내적 인식과제를 개발한 후, 5-7세의 조음음운장애아동과 일반아동 각각 15명에게 음운표상 내적 인식과제를 실시하였다. 두 집단 간 음운표상 내적 인식과제 수행력을 정반응 점수와 반응시간 비교를 통하여 알아보았다. 그리고 선행연구에서 사용되었던 음운표상 판단과제와 음운인식과제를 추가적으로 실시한 후, 두 과제와 음운표상 내적 인식과제와의 상관관계를 비교함으로써 음운표상 내적 인식과제의 타당성을 살펴보고자 하였다. 결과: 음운표상 내적 인식과제의 수행에서 조음음운장애아동은 일반아동에 비해 정반응 점수가 유의하게 낮았으며, 반응시간도 느린 것으로 나타났다. 음운표상 내적 인식과제와 음운표상 판단과제, 기존의 음운인식과제의 상관관계는 모두 유의한 정적 상관관계를 보였다. 논의 및 결론: 본 연구의 결과는 조음음운장애아동의 말소리 결함이 단순히 말소리산출 상의 결함이 아니라 음운표상의 활성화 및 조작의 어려움에 기인할 가능성을 제시한다. 조음음운장애아동 집단에서 음운표상 내적 인식과제 수행결과가 시사하는 바와 과제의 타당성을 확립하기 위해 고려해야 할 점등을 논의하였다. Objectives: This paper describes the development of the Internal Awareness of Phonological Representation (IAPR) task. This task was designed to assess a child's ability to be aware of sounds and manipulate them silently within their own stored representations while minimizing the impact of any output difficulties. The purpose of this study is to examine the underlying difficulties in phonological awareness of children with speech sound disorders (SSD) by comparing their performance on the IAPR task with typically developing children. Methods: We compared the correct response scores and reaction time on the IAPR task between a SSD group and a typically developing group of children. The correlations among the IAPR task, phonological awareness task, and phonological representation judgment task were then analyzed. Results: In the IAPR task, there were significant differences between the groups according to both correct response scores and reaction time. And there were positive correlations among the IAPR task, phonological awareness task, and phonological representations judgment task. Conclusion: The IAPR task can provide more information on both the accuracy and specificity of underlying phonological representations and phonological awareness ability. The results of the present study suggest the possibility that children with SSD have difficulties in the activation and operation of phonological representation and that this is one of the underlying factors of SSD.
볼 베어링과 형상오차를 갖는 하우징의 끼워 맞춤에 따른 베어링 진동 및 피로 수명의 영향
이영근(Lee, Young-Keun),이석훈(Lee, Seok-Hoon),정일권(Jung, Il-Kwon),차철환(Cha, Cheol-Hwan),한효섭(Han, Hyo-Seup) 한국소음진동공학회 2006 한국소음진동공학회 논문집 Vol.16 No.5
It is known that ball bearings mounted in housing or on shaft are playing a key role to keep it running smoothly. The roundness of a housing bore on which bearing outer ring is mounted with interference has directly affected the running accuracy of bearing. The running accuracy of bearing, therefore, can extend the significant influence to the rotating machinery as well. In this paper, bearing's vibration and fatigue life considering raceway roundness of ball bearing before and after mounted in housing bore are theoretically estimated. To perform analysis, a simple three degrees of freedom model was proposed and then Newton-Raphson iterative method was introduced to be utilized in the analysis. The results show that the vibration magnitude of ball bearing fitted into housing unit is appeared considerably larger than the one of its pre-assembling. And theoretical $L_{10}$ life which ninety percent of the bearing population will endure decreased in about fifty percent.
이문호,김홍수,김선주,정일권,김대중,윤석기,박상흠 대한소화기내시경학회 1998 Clinical Endoscopy Vol.18 No.4
Tuberculosis is common disease in developing countries manifested by multi-organ involvement. Although the incidence of tuberculosis has been reducing recently due to the advancement of anti-tuberculosis chemotherapy, improvement of public health, and early diagnosis, the rate is still higher in developing countries. The diagnasis of colonic tubcrculosis is difficult due to its frequency, vague manifestation, and difficulty in confirming the disease process. Fortunately, the advent of flexible colonoscopy has provided an opportunity to confirm the diagnosis of colonic tuberculosis, however biopsy can frequently leveal false negative results. A-27-year-old man was admitted with a 2 week history of rectal bleeding. He complained of anorexia, abdominal pain, and weight loss. Routine laboratory tests and chest X-ray findings were within normal limits, with the exception of left pleural thickening. A colonoscopy showed irregular and small, multiple, and shallow polypoid mucosal lesions in the ascending colon and multiple ulcers in the transverse colon. Multiple colonic biopsies suggested tuberculosis. After three months of prirnary anti-tuberculosis medica tion, the patient showed slightly improved coiono- scopic findings. Follow-up colono- scopic findings revealed more aggrevation and chest X-ray findings showed multiple patch consolidation in the left lung field. Primary anti-tuberculosis medication was stopped and substituted for secondary anti-tuberculosis medication. When clinical and colonoscopic methods are found to be compatible with intestinal tuberculosis in countries with a high prevalence of colonic tuberculosis, a therapeutic trial with an antituberculosis agent is usually considered. In a failed therapeutic trial, considerations must be made not only to other inflammatory bowel diseases such as crohn's disease, but also to multi-drug resistance tuberculosis.
간암을 동반한 윌슨병(Wilson`s disease)1 예
김철,김은주,김대중,김홍수,이문호,김선주,박상흠,정일권,남기룡 대한소화기학회 1999 대한소화기학회지 Vol.33 No.3
Wilson's disease is an autosomal inherited disorder of copper metabolism; impaired copper excretion into the bile leads to copper accumulation in liver, brain and other organ. Hepatocellular carcinoma (HCC) has rarely been reported as a sequele of Wilson' s disease. It has been shown experimentally that copper has an inhibitory effect on the factors responsible for HCC development in rats, and the low prevalance of HCC in case with Wilson' s disease may result from hepatic copper deposition which has been postulated to have a protective effect against hepatic oncogenesis. The clinica features of these cases are characterized by relatively advanced age at diagnosis, the presence of cirrhosis and a male predominance. It is suggested that hepatic copper content in the patient with Wilson' s disease who was treated with penicillamine and subsequently developed HCC may be decreased toward a nonprotective range in response to penicillamine therapy. We report the one case of patient with Wilson' s disease combined with HCC.
성인에서 발견된 췌장 가성낭종 양상을 보인 위 거대 중복낭종 1예
이철우,김대중,김홍수,이문호,김선주,봉종대,윤석기,박상흠,정일권,황보권 대한소화기내시경학회 1998 Clinical Endoscopy Vol.18 No.5
Duplication of the alimentary tract is an unusual congenital anomaly which may occur at any level, from the oral cavity to the rectum. Gastric duplication cyst is quite rare and most of them are presented in infancy with the sypmtoms of vomiting, abdominal pain, weight loss, gastrointestinal bleeding resulting from partial or complete obstruction. Some cases have not been diagnosed until adult when duplication cyst is not large enough to cause acute obstruction in infancy. Our case is more unusual in the aspect of its presence in adult and its nature resembles huge pancreatic pseudocyst. A 18-year man came to our hospital with complaint of epigastric pain for three days. A gastrofiberoscopy revealed a round protruding mass with smooth surface of normal mucosa at the fundus and computed tomography of the abdomen revealed the presence of 6.0×6.0 cm sized cystic mass between posterior wall of stomach and pancreas, and another 2.0×2.0 cm sized mass in ant. wall of stomach, which were regarded as mutiple pancreatic pseudocysts in perigastric region. Endoscopic retrograde cholangiopancreatography did not disclose any pancreatic ductal abnormality or communication with the cyst. Endoscopic ultrasonography showed anechoic cystic mass under 3rd layer of stomach wall, which was removed by surgical resection. Postoperative pathologic examination disclosed multiple gastric duplications.