사춘기전 Ⅰ,Ⅱ급 부정교합 아동의 기도 면적, 혀의 위치와 안면 형태에 관한 연구

황용인,이규홍,이기준,김상철,조형준,천세환,박양호 대한치과교정학회 2008 대한치과교정학회지 Vol.38 No.2

본 연구는 사춘기 성장 이전의 I, II급 부정교합을 갖는 아동 환자들의 측모 두부 규격 방사선사진을 이용하여 두개 안면 형태를 조사하고 이들과 혀의 위치 및 면적, 기도의 면적과의 관계를 조사하여 비인두 기도 및 혀의 형태가 악골 및 부정 교합의 형태에 미치는 영향을 알아보았다. 9 - 11세의 교정환자 76명을 대상으로 측모 두부 규격 방사선사진상 ANB difference를 기준으로 대조군(I급 부정교합군: 0 ≤ ANB difference < 4.0)과 실험군(II급 부정교합군: ANB difference ≥ 4.0)으로 분류하였다. 혀 면적, 혀와 구개 사이의 면적, 비인두 기도 면적과 두개안면형태 항목을 측정하고 비교하여 다음과 같은 결과를 얻었다. 혀 면적, 혀와 구개 사이의 면적, 비인두 기도 면적은 II급 부정교합군과 I급 부정교합군 간에 유의한 차이를 보이지 않았다. Hyperdivergent안면 형태일수록 비인두 기도 면적이 좁았다. 안모의 전후방 수직 길이가 길수록 혀의 면적이 넓었고, 전안면 고경이 길수록 혀는 하방위치 하였다. 비인두기도 면적이 좁을수록 혀의 면적도 좁아졌다. 이상의 연구 결과 혀의 면적과 위치, 비인두 기도의 면적은 I급, II급 부정교합 간에 차이를 보이지 않으며 hyperdivergent 안면 형태 및 안모의 전후방 수직 길이와 관련이 있는 것으로 사료된다. Objective: This study examined the craniofacial morphology of young patients in their prepubertal stage showing class I, II malocclusion, by analyzing lateral cephalograms, and analyzed its relationship with tongue position, tongue space, and airway space in order to ascertain the effects of nasopharyngeal airway and tongue morphology on the form of the malocclusion. Methods: Seventy-six patients aging from 9 to 11 were divided into two groups depending on the ANB difference on the lateral cephalogram: Experimental grouP (CI II malocclusion group) showing 0 ≤ ANB difference < 4.0; Control group (CI I malocclusion group) showing 0 ≤ ANB difference < 4.0. The tongue space, space between palate and tongue, nasopharyngeal airway space and craniofacial morphology were compared between the two groups. Results: Tongue space, Palate-tongue space, nasopharyngeal airway space showed no significant differences between class I and class II malocclusion groups. Hyperdivergent faces were associated with smaller nasopharyngeal airway space. Longer anterior facial height and posterior facial height were associated with larger tongue space, and greater anterior facial height were associated with lower tongue position, Smaller nasopharyngeal airway space showed smaller tongue space. Conclusions: Tongue space and nasopharyngeal airway space showed no significant differences between class I malocclusion group and class II malocclusion group. Only anterior facial height and posterior facial height had an influence on tongue space and nasopharyngeal airway space.

알레르기성 비염 환자에서 절지동물성 특이항원의 양성율 및 항원간 일치율

황규윤,남해선,박준수,권준택,백병준,김장묵,오천환,조성란 순천향의학연구소 2000 Journal of Soonchunhyang Medical Science Vol.6 No.2

The current study was designed to evaluate the positive rates of arthropod allergens by Korean inhalant panel of MAST-CLA in patients with allergic rhinitis. One hundred sixty patients, diagnosed to allergic rhinitis in an Out Patient Center of Soonchunhyang University Chunan Hopsital during Aug 1998 to July 2000, were studied. 1. The overall positive rate among 35 specific allergens was 59.4% (95 patients). 2. The arthropod related allergen accounted for 82.1% (78 patients) of the positive rate. 3. Each positive rate of Dermatophagoides farinae (Df), Dermatophagoides pteronyssinus (Dp), house dust (Hd), and cockroach mix (Cm) was 45.0% (72 patients), 43.1% (69 patients), 28.1% (45 patients), and 8.8% (14 patients), respectively. 4.Significant agreement between arthropod allergens was observer (P < 0.05). 5. The obseved agreement between Df and Dp was 95.6%, showing most significant Kappa index (Kappa = 0.911, P < 0.001). There results suggested that although MAST-CLA is a useful measure of identifying specific allergens, the specificity of two mite allergen relatively low, implying because of common allergen between mites in Korean panel of MAST-CLA. Our data also supported that arthropod is the major cause of allergen in patients with allergic rhinitis, however, the MAST-CLA should be modified in order to exclude common allergen of mite and to include more specific mite allergen.

유리 성형용 금형의 균열 발생 기구

황규홍,송동환,양권승,이종국 조선대학교 생산기술연구소 2005 生産技術硏究 Vol.27 No.2

Microstructure of glass-forming mold have influence on the mechanical properties such as hardness, and life span of the glass-forming mold is strongly dependent on its microstructure. The glass-forming mold with guaranteed tool life requires fine particle size and homogeneous distribution of Cr precipitates in the matrix. In this study, mechanism on the crack creation of the glass-forming mold made in Korea (K-mold) was compared to the one glass-forming mold made in Japan (J-mold). SEM observation revealed that the particle size of the Cr precipitates in J-mold was smaller than that in K-mold, in addition the size distribution of J-mold was narrower than that of K-mold, resulting in long life of J-mold. Therefore, it was confirmed that the microstructure of the glass-forming mold related to Cr precipitates was one of the important parameters to improve the quality of products.

초기 성공적인 심폐소생술후 혈청 Interleukin-6 농도의 발현양상

박규남,박승현,황두영,김형국,이환,최경호,이원재,정욱성,김학주,김세경 大韓應急醫學會 1998 대한응급의학회지 Vol.9 No.4

Objective : To investgate patterns of serial serum interleukin-6(IL-6) concentrations after initial successful cardiopulmonary resuscitation, and to access differences in serum IL-6 concentrations in patients with Cerebral Performance Category(CPC, 1-2) and CPC(3-5) at the 5th day after cardiacpulmonary resuscitation(CPR). Methods : We studied prospectively 12 patients with spontaneous circulation after cardiopulmonary resuscitation. Venous blood samples were taken 2, 4, 12, 24, 48 and 72 hours after restoration of spontaneous circulation to measure serum IL-6 levels by the enzyme-linked immunosorbent assay. Results : Serum IL-6 concentrations in the severe neurolgically disabled group(CPC, 3-5) were significantly increased at 2, 24 and 48 hours after restoration of spontaneous circulation compared with the less neurolgically disabled group. Also, serum IL-6 concentrations in the severe neurolgic disabled group showed dual peak at 4 and 24 hours. Conclusion : Our study demonstrates significant increase of serum IL-6 in patients with CPC(3-5) after successful cardiopulmonary resuscitation and the significant correlation between early increase of serum IL-6 and poor neurologic outcome. It suggests that early increase of serum IL-6 can be used as a prognostic marker after successful cardiopulmonary resuscitation.

超軟弱 粘土의 壓密特性 硏究

李揆丸,李松,黃圭鎬,金周豪 서울市立大學校 1994 論文集 Vol.28 No.-

In recent years, the projects dealing with the marine clay have raising tendency. For example, the dredged clay can be used directly as the reclamation fill material. In this case, it is important to understand the consolidation characteristics for settlement analysis. Using conventional testing procedure, the determination of the consolidation characteris tics of cohesive soils requires consolidation time. the constant rate of strain consolidation test has been proposed as a method to reduce consolidation test time. The information used to the characteristics of settlement has been obtained using a standard oedometer test, but standard oedometer test may not be applicable to very soft soils with high water content because of limations both in theory and in testing techniques. A new constant rate of strain consolidation testing technique for very soft soils with water content of 200 to 500 % is proposed as an alternative of conventioinal oedometer test. This paper presents several benifts on the constant rate of strain consolidation test. To find the consolidation characteristics of the dredged soft clay constant-rate-of-strain consolidation testing method is used In this paper constant rate of strain consolidation test are compared with standard oedometer test for applicablity of constant rate of strain consolidation test It is concluded that the consolidation constants of very soft clays can be accurately determined from the constant rate of strain tests,also is suitable test of derdged clays as this test is applicable to regimes of the low stress level and high stress level

Baclofen 投與에 따른 精神分裂症 患者의 血淸 成長호르몬의 反應

李圭煥,白仁浩,高孝進,李正杓,咸雄,李奎恒 서울醫大 1990 精神醫學 Vol.15 No.1

XML 기반의 응답자 주도형 실시간 설문조사 시스템의 설계 및 구현

전찬환,최황규 강원대학교 정보통신연구소 2004 정보통신논문지 Vol.8 No.-

It seems to be so many surveys for marketing research or customer's behavior. Recently, such s w e y systems using a standalone survey software or through on-line web site have been developed. Due to much of time and effort to deal with various and large data, an automated computer survey system's need has been desperately expected. This paper reveals that we design and implement reliable real-time survey system useing XML in order to process survey system's various type of data efficiently.

알레르기 환자에서 MAST-CLA 검사의 의의

남해선,황규윤,,백병준,정윤영,오천환,조성란,박준수 순천향의학연구소;Soonchunhyang Medical Research Institute 2000 Journal of Soonchunhyang Medical Science Vol.6 No.1

To evaluate usefulness of application of MAST-CLA to indetify allergens, authors conducted MAST-CLA allergen-specific IgE assay and collected allergy related symptoms in 118 allergic patients diagnosed at Soonchunhyang University Chunan Hospital during October 1998 through January 2000. The results were as followings; 1. The mean (SD) age was 23.1 (±12.17) years old and teenagers accounted for 33.1% of patients. 2. The frequent allergic symptoms were sneezing (59.3%), rhinorrhea (53.4%), nasal stiffness (44.1%), itching sensation (24.6%), cough or sputum (16.1%), and eye symptom (8.5%) in order. 3. Among these subjects, 62.7% of patients revealed at least more than one specific allergen and 70.3% showed elevated total IgE levels by MAST-CLA. The three most frequent specific allergens were Dermatophagoides farinae (47.5%), Dermatophagoides pteronyssinus (45.8%), and house dust (30.5%). 4. While age was not significantly related to positive of both specific allergens and total IgE (P>0.05), sneezing and nasal stiffness were significantly associated with positive of specific allergen and total IgE, respectively (both P<0.05). 5. Total IgE increased with the number of specific allergens, but both specific allergen and total IgE were not significantly related to increases of allergic symptoms (P>0.05). In conclusion, our data suggest that MAST-CLA allergen-specific IgE assay is useful measure for identification of causative allergens in allergic patients, however, it is recommended that more specific allergic antigens should be determined and replaced or added to Korean inhalent panel of MAST-CLA.

AR기법을 이용한 SLAM 영상 개선

김현,송대건,황기환,연규헌,전계석 慶熙大學校 大學院 1998 高凰論集 Vol.22 No.-

In this paper, we have been studied the enhancement of SLAM image using average response methos. AR methos has been used to reduce the random noise in signal processing. In this the experiment, we have constructed the SLAM system of 10㎒ operating frequency and experienced for holed Al sample. In this experimental result, we have been found that SLAM using AR method was able to get the high-speed and enhanced image compared with SAM.

신도시 중산층 아파트 지역에서의 하수발생량 및 절수 홍보 효과

金應鎬,許順哲,趙珍奎,黃煥國 弘益大學校 科學技術硏究所 1996 科學技術硏究論文集 Vol.7 No.1

Both pattern of water use and pollutant load were investigated in the apartment area for the middle class of a new town. Especially the analysis of the effect of saving water under public information of saving water was used to search possible quantities of saving water. The results of this survey showed that each household had 3.84 persons with water use rate of 262 L/capitaㆍd on an average. The average domestic loading for COD, BOD, SS, T-N and T-P were 107.5, 49.5, 50.1, 7.7 and 1.6 g/capitaㆍd, respectively. Water used by residential households consists of water for washing clothes, toilets, bath, showers, kitchen, washing up and sweeping. Among above sources toilet water (26%) occupied the largest component of residential water use. Also the reduction of total water use was 12.3% by public information of saving water.