騷音性難聽에 對한 聽覺學的 考察

丁東奎 충남대학교 대학원 1976 論文集 Vol.6 No.-

Audiological evaluation was performed for 184 female weavers(351 ears), who were 18~25 years old and have been working under the exposure of 103~105 dBa of machinery noise With the duration of employment they were divided into five groups under 1 year, 1~2 years, 2~3 years, 3~4 years and over 4 years The following results were obtained, 1) Theindcience of noise induced hearing losswas 39.7%(36.2% of ears) and rapidly increased during first 1~2 years 2) The average maximum hearing loss on the pure tone audiograms appeared at 4,000 ㎐ with about 40 ㏈ of hearing level The average hearing level at high frequencies (3,000 ㎐-8,000 ㎐) showed below 25 ㏈ of hearing level in all groups and had the tendency to increase slightly with the duration of working, but themost of hearing losses developed during first one year except at 8,000 ㎐ 3) The average hearing levelat speech frequencies was within normal range but the cases of hearing level over 25 ㏈ at 2,000 ㎐ was 27.% 4) The cases with maximum hearing loss at 4,000 ㎐ were 72.7% but the cases of maximumhearing loss at the other frequencies (3,000 ㎐, 6,000 ㎐ and 8,000 ㎐) were also observed and they increased slightly in numbers with the duration of working The noise induced hearing loss under the exposure of 103~105 dBA for 5 years, seemed to develope during first 1~2yars and there after slightly increase hearing loss was showed but no edarkable changes weer observed rem.

울릉도 특산식물에 관하여

정동규 淑明女子大學校 藥學大學 1969 藥硏 Vol.5 No.1

한국산 현호색의 성분연구

정동규 淑明女子大學校 藥學大學 1971 藥硏 Vol.7 No.1

양측 하지마비를 동반한 내경동맥분기 동맥류 : 증례보고 An Initial Manifestaion of a Ruptured ICA Bifurcation Aneurysm

정동규,민병국,석종식,최덕영,임광세 대한신경외과학회 1988 Journal of Korean neurosurgical society Vol.17 No.2

A case of sudden paraplegia as the first symptom of a ruptured internal carotid artery bifurcation aneurysm is reported. Sudden appearance of paraparesis or paraplegia is an exceptional event in patients with intracranial aneurysms. The various pathogenic mechanisms are briefly discussed. Insufficient blood perfusion of both paracentral areas was the cause of paraplegia in this case.

미국 개미취 根 Aster divaricatus L.의 성분 연구(一)

鄭東奎 淑明女子大學校 1977 論文集 Vol.17 No.-

Aster divaricatus LINNE'(Compositae) is a perennial plant which is distributing in the all of area of the United States of America. This plant has been reported that it is using for anti-tumor agent on Ameria. Recently, Dr. Norman R. Farnsworth, Professor of Pharmacognosy at the college of Pharmacy, University of Illinois predicted that Astersaponin obtained from the root of Aster divaricatus will be tri-terpene saponin and it will be available for anti-tumor. However, the active constitvents didn't isolate yet from the plant. I got eight fractions from the petroleum ether extract and marc of the root of the plant. (Chart I). Five compounds were isolated from fraction A among the eight fractions by using column chromatography method. (Tab. Ⅳ) According to the view of IR spectra, mp. etc. (Fig. 3 Fig. 4, Fig. 5, Fig. 6, Fig 7) 5 compounds are presumed as alkanes CH_3(CH_2)_nCH_3.

만성 경막하 혈종의 임상분석

정동규,이영배,박관,김영백,민병국,황성남,석종식,최덕영 대한신경외과학회 1989 Journal of Korean neurosurgical society Vol.18 No.4

In a retrospective study between January 1984, and July 1988, 50 cases of chronic subdural hematoma were analysed. All hematomas were operated on by enlarged burr-hole craniostomy and closed-system drainage. The results of the analysis were summerized as follows : 1) Eighty percent of the patients were 40 years or older. The ratio of male versus female was 4.6:1. 2) History of trauma was present in 70%, Seven patients were known to be chronic alcoholics. 3) The major clinical symptoms and signs were headache(72%), alteration of consciousness(54%), motor weakness(48%), papilledema(34%). 4) Clinical findings at admission and outcome at discharge were graded according to the scale proposed by Markwalder et al. Majority of the patients belonged to group 1(52%), followed by group 2(40%), 3(6%). 5) The hematoma densities in brain CT at admission were hypodense(46%), isodense(34%), hyperdense(16%), and mixed-dense(4%). The shapes were planoconvex(42%), crescentic(32%), biconvex(26%). Four patients(8%) had bilateral hematomas at admission. 6) The average numbers of burr-hole craniostomy were two(80%), and the average duration of drainage was three days(72%). Only four hematomas were without neomembranes. 7) Burr-hole craniostomy and catheter drainage resulted in an excellent outcome in 43 patients(86%) at the time of discharge. There was no death in this study group.

외대으아리 Clematis brachyura Maximowicz의 形態學的 硏究

鄭東奎 淑明女子大學校 1968 論文集 Vol.7 No.-

The roots of Clematis brachyura Maximowicz and other several Clematis plants are diuretic and analgesic which are used for uraemia, ventilation and nuralgia etc., and the infant leaves of these plants are used for eat. Among these Plants Clematis brachyura Max. is only positive to the flavone reaction (Mg+HCI→red). As I'd been collecting Clematis brachyura Max. in kapyong kyonggi Do of korea for research of the canstituents in this plant, I found four similar species externally to Clematis brachyura Max. and these four species were positive to the flavone reaction (Mg+HCI reaction). I've studied external morphology and plant anatomy to the above four similar species and through my study, I think that these four Species are morphological varieties of Clematis brachyura Max. For the convenience' sake, I've named each specy by those morphological characteristic for the following next research. Those name are following. Among four species Sample I has red brownish Stem and reddish 22 stripes, and called Clematis brachyura Max. var. stripe-Caulis Chung. Sample Ⅱ has 2-divided or 3-divided leaflet (Fig.4) and Called clematis brachyura Max. var. dividere Folium Chung. Sample Ⅲ has broad lanceolate leaves and gave a name Clematis brachyura Max. var. lanceolatum-Folium Chung. Sample Ⅳ has red brown stem. And the under portion of stem were coloured with red, also it has given a name Clematis brachyura Max. var. rubra-Caulis Chung.

다층구조 신경망에서 비선형 시그모이드 함수의 Taylor 시리즈 근사화에 의한 랜덤잡음의 비선형 변환

정동규,정규범 우석대학교 자연과학연구소 1997 自然科學硏究論文集 Vol.1 No.-

It is well known that multi-layer feedforward neural networks have the capability of function approximation and pattern recognition through a series of weighted sums and nonlinear transformations. The capability of the network depends upon the set of weights and the characteristics of nonlinear processing units. For the estimating output perturbation in the implementation of the network, it is important to understand the nonlinear transformation of the Sigmoid function. In this paper we analyze the nonlinear transformation of the weighted sum error fed to the function. An approximation of the nonlinear Sigmoid function with nth Taylor series is introduced for the analysis of the statistical noise model. Based on the analysis, the error of the Sigmoid output to the weighted-sum error has been derived. It is assumed that the error in the weighted sum are due to perturbations of the weights and that inputs to the network are statistically independent. The results obtained are expressed with the expectation and variance of output error. And it is applicable to both digital and analog feedforward neural networks with a large sized network, a network with many neurons per layer exception for output layer. For the verification of the derived results computer simulations have been performed, resulting in good agreement between the numerical results and the results of the Taylor approximation of the Sigmoid on the wide range of the weighted sum error.

덧나무(민들딱총)의 成分硏究(제1보) : 줄기의 벤젠엑기스에 관하여 On the Benzens Extract of Wood of Sambucus sieboldiana Blume

정동규 숙명여자대학교 1970 藥硏 Vol.6 No.-

The Benzene extract of the Wood of Sambucus Sieboldiana BLUME examined by Akira Yagi kuminhide Mihashi and Takeo Tsukamoto in faculty of Pharmacy, Fukuoka University, Japan. α-Amyrin, β-sitosterol containing campesterol and stigmasterol and a mixture of oleanolie and ursolic acids were isolated, and identified with the aid of gas chromatography.

韓國軍 將兵의 腫瘍에 對한 統計的 觀察

鄭東奎,鄭檜敎,芮學聖,鄭相震 경북대학교 의학연구소 1969 慶北醫大誌 Vol.10 No.2

Eighty-seven hundred and sixty five surgical specimens which had been diagnosed as tumor histologically from January 1953 to December 1967 at Medical General Laboratory, were studied statistcally. The most common benign tumor was neurofibroma. The most common malignancy in adult was lymphosarcoma. The next common malignency was tumor arising from stomach origin.