MR Evaluation of the Olfactory Bulb in Normals and Patients with Decreased Sense of Smell

양경훈,김만익,문우보,김익태,박영민,임현준,이율 대한비과학회 1998 Journal of rhinology Vol.5 No.1

To evaluate changes in olfactory bulb size in patients with reduced or no sense of smell, 23 normals and 20 hyposmics or anosmicswere examined with nasal endoscopy, olfactory testing and magnetic resonance imaging (MRI) of the olfactory bulb. Olfactory testing consisted of a threshold test by bounded three-alternative forced-choice modified ascending method of limits(CCCRC test) and the step method using threefold dilutions of 1-butanol and an olfactory identification test using 32 natural odorsfamiliar to Koreans. The MR evaluation involved the estimation of olfactory bulb size by using a 13 cm diameter general purposesurface coil with 3 mm T1-weighted MR coronal sections without interval. The cut areas of the olfactory bulb in MR coronalsections were measured with a Hope Graph Planimeter (model No. 9-003) after fivefold enlargement. The olfactory bulb wasobserved in three cuts of MR imaging in all subjects. In the measured area of the olfactory bulb, the anterior portion of the olfactorybulb was significantly smaller than the middle and posterior areas in normals, but hyposmics or anosmics showed decreasedolfactory bulb area, especially in height, when compared with normals. There was good correlation between olfactory bulb areaand olfactory threshold as well as olfactory identification in normals and patients. MR imaging can be a useful tool for patientswith hyposmia or anosmia.

기존 조직과 비교를 통한 가상조직의 특성에 관한 연구

양경훈,김정윤,유훈상 중앙대학교 산업경영연구소 1999 산업경영연구 Vol.8 No.1

요즘 사회에서 정보는 현대 경영 환경에서 가장 중요한 자원이 되었다. 컴퓨터를 사용하는 정보기술은 조직구조를 조직하부로부터 재조직하고 있다. 이러한 상황은 ″가상기업″이라는 새로운 개념을 만들어 내게 되었다. 본 논문의 목적은 정보화 사회에 기업의 경쟁력을 극대화할 것으로 예상되는 가상기업의 모델을 제시하고 그 특징을 조직론적 입장에서 연구하는데 있다. 가상기업의 모델 제시와 조직적 우수성을 입증하려는 이유는 가상기업의 도입으로 기업이 현재와 미래에 효과적이고 효율적으로 경영을 할 수 있는 조직을 구성하게 됨을 보이는 것이다. 제2장은 아직 초기 단계의 개념인 가상기업의 개념 정립을 하였다. 먼저 인터넷 자료와 문헌 연구를 통하여 가상기업에 대한 모델을 제시하였고 모델에서는 기존 연구들을 종합하여 가상기업의 정의를 내리고 정의를 중심으로 특징과 단점을 제시하였다. 제3장은 가상기업의 사례를 조사하여 분석하였다. 제조업체 2개사와 서비스업체 1개사를 조사하였다. 이를 통해 가상기업의 특징으로 제시한 부분을입증하였다. 제 4장에서는 가상기업이 이루는 조직이 기존의 조직보다 우수성을 가짐을 Galbraith가 제시한 조직을 설계하는 요소들을 현대적인 입장에서 다시 구성하여 이를 기준으로 Minzberg가 분류한 조직의 유형들과 비교하여 분석하였다. 제 5장은 결론으로 전체내용의 요약과 본 논문의 공헌과 약점 그리고 앞으로의 연구방향을 기술하였다. Nowadays, information is the most important resource in modern management environments. Information technology using computer reorganizes the organization structure from the bottom. This situation makes new concept ″Virtual Corporation″ . The purpose of this paper is to present the model of Virtual Corporation which will have competitive advantages in information society and account organizational efficiency and show how to build the Virtual Conporation In chapter two. We synthesize existing researches and present model of Virtual Corporation and characteristics. Also I present the risk of virtual corporation to show week points of Virtual Corporation. In chapter three analysis three Virtual Corporation cases and shows organizational effectiveness and efficiency of Virtual Corporation. The factors of organization design, given by Dr. Galbraith, are restructured by our point of view and compared with other organizational structures that are given by Dr. Minzberg. In chapter five, the conclusion is summarized. Also we present this research′s contributions, weak points and future study.

A Case of Kallmann’s Syndrome:MR Imaging and Histopathology

양경훈,이창윤,박영민,유재명,심정원 대한비과학회 1998 Journal of rhinology Vol.5 No.1

Kallmann’s syndrome is a rare genetic disorder defined as a combination of anosmia or hyposmia and hypogonadism due tohypothalamic-pituitary deficiency. The incidence of Kallmann’s syndrome is one in 100,000 men and one in 50,000 women. However, the syndrome is found in one in 25 people with hypogonadism. The clinical evaluation of these patients includes historicaland physical examinations;chemosensory testing, which includes olfactory threshold and identification tests;laboratorytesting for hormonal abnormalities;MR imaging of the olfactory apparatus;and histopathologic findings through an olfactoryepithelial biopsy. We report the case of a 19-year-old male patient who had anosmia since birth and who was diagnosed withKallmann’s syndrome.

농업정보시스템을 위한 모델베이스 시스템 구축에 관한 연구

양경훈 中央大學校 食糧資源硏究所 1997 食糧資源硏究所 論文集 Vol.18 No.1

디지털 경제에서 조직의 CIO의 역할 분석에 관한 연구

양경훈 중앙대학교 산업경영연구소 2000 산업경영연구 Vol.9 No.1

본 연구는 CIO 제도의 체계적이고 이론적인 발전모형을 제시하고 이에 따른 전략과 세부 이행 계획을 세워 새로이 CIO 제도를 도입하고자하는 조직에는 지침이 되고, 현재 실행 중인 조직에는 현재 자신들이 속해있는 단계를 인식하여 앞으로 발전시켜 나가야 할 방향을 제안하여 앞으로 지식경영을 위해 CIO가 해야 할 역할이 무엇인지를 살펴본다. 또 본 연구에서는 크게 제도 발전 단계를 5단계로 세분하고 각 단계별 특징과 추진전략, 이에 따른 이행계획을 세움으로써 새로이 CIO 제도를 도입하려는 조직에 지침을 제공한다. 그리고 CIO 제도를 도입하여 시행하고 있는 조직에는 현재 조직이 처한 위치를 인식하고 앞으로 CIO 제도를 발전시켜 나갈 수 있는 방향을 제시하고자 하였다. 이를 위한 실증조사로 국내 민간기업과 공기업을 무작위로 선정하여 설문조사를 실시한다. This research has two objectives. One is to establish the role of the CIO in the organizations for the knowledge management environments. The other is to set up the evolutionary mode, strategy and detailed implementation plan for the CIO systems in the organizations. Two emphases are given in this research. The first one is that this research provides guidelines for the non CIO-adopted organizations for the systematic and effective adoption strategies and detailed implementation plans. The other one is that this research assists the organizations to adopt the CKO systems under the knowledge management environments and sets the boundaries of the roles of the CIO in the organizations under the knowledge management of organizations.

객체 - 관계 모델을 이용한 뷰 통합 방법론 개발

양경훈,강희창 한국경영정보학회 1997 한국경영정보학회 학술대회논문집 Vol.1997 No.-

정보시스템요원의 필요능력에 대한 인식의 차이와 선호교육방법에 관한 연구

양경훈,김도일,정선학,강주선 한국경영정보학회 2000 한국경영정보학회 학술대회논문집 Vol.2000 No.-

요추부 불안정증의 방사선학적 소견

양경훈,김남규,김영수,고용,오성훈,오석전,김광명,Yang, Kyoung Hoon,Kim, Nam Kyu,Kim, Young Soo,Ko, Yong,Oh, Seong Hoon,Oh, Suck Jun,Kim, Kwang Myung 대한신경외과학회 2000 Journal of Korean neurosurgical society Vol.29 No.1

Objective : Lumbar spinal instability occurs when normal biomechanics support in lumbar vertebrae interrupted. Despite the recent enthusiastic studies, the precise radiological assessment has not been fully established, yet. Therefore, we carefully studied our cases to analyze the radiologic findings in lumbar spinal instability. Patients and Methods : We have put together radiological analysis and assessment based on 38 patients who have been diagnosed and treated for lumbar spinal instabilities from June 1994 to December 1998, Patients who have been diagnosed and treated for trauma were excluded from study. Results : The outcomes are as follows : 1) Lumbar lordotic curve was statistically significant in unstable group by 23.7, compared to the control group ($17.0^{\circ}$). 2) According to the resting x-ray, sagittal plane angulation measured on unstable group was $21.1^{\circ}$, control group $18.0^{\circ}$. Therefore unstable group was noticeably higher(p<0.01). 3) According to the resting x-ray sagittal plane displacement, unstable group had 4.3mm, the comparison had 1.2mm. Therefore measurement from the unstable group were significantly higher(p<0.01). 4) According to stress view, sagittal plane translation was 4.1mm for the unstables and 2.7mm for the comparisons. Therefore unstables were noticeably higher(p<0.01). 5) According to stress view, sagittal plane rotation was $15.1^{\circ}$ at L3-4, $22.0^{\circ}$ at L4-5, $27.9^{\circ}$ at L5S1 for the unstable group and $11.3^{\circ}$, $18.1^{\circ}$, $21.0^{\circ}$ each for the comparison. 6) Facet angle for unstable group, left $29.3^{\circ}-61.5^{\circ}$, right $24.4^{\circ}-63.2^{\circ}$ and the mean for each are $43.1^{\circ}$, $47.2^{\circ}$. The difference between left and right facet angle was $3.5^{\circ}-20.7^{\circ}$ and the mean value $15.3^{\circ}$. Facet angle for the comparisons for the left was $29.3^{\circ}-59.5^{\circ}$, right was in between $25.7^{\circ}-64.5^{\circ}$ range and the each mean are $44.9^{\circ}$ and $47.6^{\circ}$. Also, the difference between left and right facet angle was $4.1^{\circ}-9.3^{\circ}$ and the average was $17.1^{\circ}$. The average and the difference between the left and right angle are found not to have statistic necessity for both unstable and stable measurements(p>0.01). 7) 19 patients were found to have vacuum facet phenomenon among unstable group etc. results were collected. Conclusion : According to above results, we attempted to prepare the application to the patient of radiological analysis and assessment for lumbar spinal instability early checkup.

Measurement of Nasal Trigeminal Pungency Threshold: Comparison between Normals and Patients with Decreased Sense of Smell

양경훈,이창윤,김익태,박영민,임현준 대한비과학회 2000 Journal of rhinology Vol.7 No.2

Background and Objectives:In order to measure the level of nasal trigeminal pungency threshold and to evaluate theinteraction between olfactory and trigeminal nerves, we measured olfactory thresholds and trigeminal pungency thresholdsusing 1-butanol in 40 normal people and in 46 patients with decreased sense of smell by non-sinonasal origin. Materials andMethods:Two-alternative forced-choice modified ascending method of limit (CCCRC test) was used for the measurement ofolfactory and pungency thresholds, using 1-butanol plastic squeezable bottles successively threefold diluted by distilled wateras stimulus, while distilled water as blank. Results:There was a statistically significant difference in pungency thresholdbetween normals (2.18±1.5 dilution step) and patients (1.11±1.0 dilution step)(p<0.001). Conclusion:The pungencythresholds of hyposmics and anosmics are higher than those of normals, which suggests that a loss or decrease of olfactorysensation is accompanied by a simultaneous decrease of trigeminal chemosensitivity.

국내기업의 LAN 시스템 도입 및 활용에 관한 연구

양경훈,여원구 한국경영정보학회 1994 한국경영정보학회 학술대회논문집 Vol.1994 No.-