중국 연변 경제의 활성화에 관한 연구

이경미,김경욱,안석호 朝鮮大學校 2003 經營經濟硏究 = Management and economics research Vol.26 No.1

Hinman 증후군(비신경인성 신경인성 방광) 1예

이경욱,채정호,이승주,김세웅,박원명,전태연,김광수 大韓神經精神醫學會 2003 신경정신의학 Vol.42 No.3

Objectives : The Hinman Syndrome is a condition representing urinary voiding dysfunction in a neurologically intact child. This syndrome probably is an acquired behavioral and psychosocial disorders. We present a case presenting voiding dysfuntion with no neurologic etiology. Case : The departmcnt of urology consulted the department of psychiatry for a psychiatric evaluation of a 14-year-o1d girl with a history of recurrent urinary tract infections, enuresis, and urinary dribbling since early childhood. She visited the emergency room bccausc of severe abdominal pain and hematuria. She was admitted to the department of urology. Neurological tests showed no abnormality, but a retrograde cystogram showed free vesicoureteral reflux to the level of the dilated intrarenal collecting systems. Marked blunting and dilatation of the caliccs suggested longstanding urinary flow obstruction. She had a history of scparation anxiety disorder and was very competetive, perfectionistic, and nervous. She also had very poor relationships with her friends and had difficults in managing them. Afer admission, she had stent operation and cystostomy. Antidepressant and anxiolytic medications with supportive psychotherapy were administered to treat anxiety, tension and depression. Gradually, her depressive symptoms and voiding difficulties improved. Conclusions : Psychological factors such as a perfectionistic and obsessive personality, a history of severe separation anxiety, stressors from poor interpersonal relationships and Ihe failure of an entrance examination seem to have contributes to the development and exacerbation of the urinary dysfunction. Pharmacotherapy and supportive psycho-therapy may be efective in treating associated psychiatric problems of these patients with hinman syndrome.

國産 火藥類의 種類에 따른 發破 振動値의 比較

林漢旭,金雄秀,李慶雲 江原大學校 産業技術硏究所 1985 産業技術硏究 Vol.5 No.-

The blast-induced ground vibrations is one of the most important factors which is considered to design blasting patterns in urban excavation. To compare with vibration level of different explosives, peak particle velocity of each explosive was measured. The results are summerized as follows. 1. Among the three kinds of explosives, the largest vibration was obtained from the gelatine dynamite, while the smallest was blasting of ammonium nitrate. 2. The vibration levels of ammonim nitrate and slurry explosive were smaller about 35%, 20% respectively than that of gelatine dynamite.

황산염 환원균을 이용한 중금속 제거

배병욱,임경묵 大田大學校 環境問題硏究所 1999 환경문제연구소 논문집 Vol.4 No.-

In this study, the possibility to remove heaby metals in various industrial wastewater using sulfate reducing bacteria(SRB). For the proper selection of heavy metal as well as COD : SO₄² : heavy metal ratio, several kinds of serum bottle test(SBT) were conducted. In addition, using a coagulated tannery wastewater(add to 500 glucose mg/ℓ) as a feed, a batch-type anaerobic reactor having a working volume of 13.7ℓ was operated for 132 days in order to culture the acclimatized SRB and to investigate the sulfate reducing potential. When the heavy metal, such as iron, copper, and zinc, was added up to 100 mg/ℓ to medium of SBT without sulfate)COD:SO₄²:heavy metal = 1:0:0.1), the prganic removal rate was seriously inhibited due probably to the toxic effect of heavy matal. But, in the case of sulfate-riching condition(COD:SO₄²:heavy metal = 1:0:0:1), the organic removal rate increased up to 95% and sulfate reducing rate was much more than the blank with no added sulfate. Among three kinds of heavy metal, iron showed the most reasonble results with respect to sulfate reduction. According to the operating results of anaerobic bach reactor, organic removal and sulfate reducing rate was maintained to 59 and 78%, respectively, when the COD loading rate was 0.11kg/㎥·d and sulfate loading rate(SLR) was 0.1kg SO₄²/㎥·d.

초내식성 스테인리스강의 교정용 브라켓에의 적용

추성욱,김경남,김광만,이원유,박용수,이상배 대한치과기재학회 1998 대한치과재료학회지 Vol.25 No.3

Esthetic has become an indispensable factors to consider when choosing a orthodontic fixed appliances. However, most of the brackets used on orthodontics are made of metallic materials because those esthetic alternatives showed several controversies like brittleness, deformation and discoloration. The AISI austenitic classes, 303, 304, 316 and 317 type of stainless steels are frequently used for orthodontic metallic brackets fabrication. The composition of this type of alloy is 18 wt% of chrome, 8 wt% of nickel, 2 to 3 wt% of molybdenum and low carbon contents. They seemed to show relatively good characteristics to fabricate the orthodontic brackets in previous study. But in hostile condition such as low pH containing chlorine ion like saliva they might to be attacked by localized corrosion. The purposes of this study were to evaluate the microstructure, microhardness, corrosion resistance, frictional resistance and cytotoxocity of 316L(MD), AISI 304(AC) and experimentally produced super stainless stell bracket(SS). The results from this study were as follows; 1. MD and AC showed (Cr, Fe)23C6 precipitating in austenite matrix. SS showed small ferrite island forming in matrix. 2. SS showed the highest polarization resistance(Rp). SS seemed to have the highest corrosion resistance since SS showed 0.9 ×10-3 MPY, MD showed 3.7 ×10-3 MPY and AC showed 7.4×10-3 MPY. 3. The friction resistance decreased from 3 days to 4 weeks for SS(p<0.05). MD showed significant differences for the measurement of 3 days, 2 weeks and 4 weeks. AD did not showed significant differences to 3 days but increased at 2 weeks(p<0.05). 4. SS seemed to have the best biocompatibility since SS showed response index of 0/1 (mild), AC showed 1/2 (mild+) at cytotoxicity test. According to these results, SS seemed to have sufficient characteristics to fabricate the orthodontic brackets and superior corrosion resistance compare to AISI 300 type stainless steel which could lower the chance of nickel allergic reaction.

노인에서 정서 인식의 저하

이경욱,채정호,최인철,이해국,권용실,이정태 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.2

Objectives : The purpose of this study was to investigate whether elderly and young adults differ in their recognition of facial expressions of emotion. Methods : A total of 120 (elderly group 53, young group 67) subjects participated in this study. Korean facial expressions of emotion including happiness, sadness, fear, anger, disgust, surprise and neutral were used as stimuli for facial affect recognition test. Computerized facial affect recognition test that consists of facial affect discrimination test and facial affect intensity test was performed. Results : For facial affect discrimination test, there was a significant difference between two groups (F==3.986, P<.01) after controlling the effect of education. Elderly participants showed significantly less correct recognition rate with sadness, anger and disgust (p<.05). For facial affect intensity test, there was no significant difference between the groups in recognition of emotional intensity. Chi-square test or t-test was done according to the clinical variables. Multivariate analysis of covahance was done to test group differences of correct recognition rate and emotional intensity. Conclusion : This is the first report of differential decrease of facial affect recognition in elderly using Korean facial expressions. This study suggests that the decrement of facial affect recognition maye be a part of normal aging process.

하악골 신연술 후 생성된 신생골의 조직학적 및 면역화학적 소견

윤경인,박재억 대한악안면성형재건외과학회 2001 Maxillofacial Plastic Reconstructive Surgery Vol.23 No.3

Distraction osteogenesis(DO) can be performed in the bony defect associated with trauma, anomaly, and various kinds of disease. The gap generated by DO is filled with growing callus : during the period of distraction, the osteogenesis is continued. However, there have been few reports about expression pattern of growth factors in newly formed bone during the consolidation periods. We performed DO in the mandibular defect case and studied the expressed pattern of growth factors. Its pattern was compared to that of the same patient. BMP-2 and -4 were strongly expressed in the DO site. Particularly, BMP-4 was not expressed in the normal mature bone, but expressed in new bone in DO. However, there was no difference in the FGF-7 expression between the sites. Therefore, strong expression of BMP-4 are related to new bone formation in DO and they may not be related to the normal homeostasis in human bone. Though FGF-7 is related to the growth of keratinocyte, it may have minimal role in the DO and normal mature bone.

진단 기준에 따른 취학전 어린이의 중증 유아기 우식증 유병률 비교

임경욱,이광희,라지영,이동진,안소연,김지영,송지현,김윤희 大韓小兒齒科學會 2008 大韓小兒齒科學會誌 Vol.35 No.4

연구목적은 중증 유아기 우식증에 대한 두 개의 정의를 진단 기준으로 하였을 때 각 기준에 따른 유병률이 일치하는 정도를알기 위함이었다. 연구대상은 익산시 어린이집 중에서 무작위로 추출한 7개 어린이집의 36개월 이상 71개월 이하 어린이401명 이었다. 치경과 탐침을 사용한 구강검사를 통하여 치아별 우식경험유치면 (dmfs)의 수를 조사하였으며 . 중증 유아기 우식증의 진단 기준은 (1) 상악 전치에 1개 이상의, 와동이 형성된 우식,상실(우식증에 의한), 충전 평활면이 있거나 (2) 우식,상실,충전 치면의 수가 3세는 4개 이상.4세는 5개 이상.5세는 6개 이상인 경우로 하였다. 상악 전치부 우식증에 의한 우식유병률과 우식경험유치면수(dmfs)에 의한 우식유병률은 3세에서 각각 26.7%. 28.9%, 4세에서 각각 32.4%, 30.4%, 5세에서 각각 39.4%, 41.3%, 전체에서 각각 35.4%, 35.9%으로서. 연령별로는 약간의 차이가 있었으나 전체에서는 차이가0.5%로서 거의 일치하였다. 따라서 중증 유아기 우식증의 진단은 두 가지 기준 중에서 어느 하나를 사용하더라도 비슷한 결과가 나을 것이라는 것을 확인할 수 있었다. The purpose of study was to compare the prevalences of severe early childhood cahes(S-ECC) using two different diagnostic criteria. The subjects of this study included 401 preschool children from 36 to 71 months of the randomly selected seven nurseries in Iksan city. Severe early childhood caries was defined as (1) 1 or more cavitated, missing (due to caries), or filled smooth surfaces in primary maxillary anterior teeth or (2) a decayed, missing, or filled score of ≥4 (age 3), ≥5 (age 4), or ≥6 (age 5) surfaces. The prevalence determined by maxillary anterior caries and the prevalence determined by dmfs were 26.7%, 28.9% in 3 years, 32.4%, 30.4% in 4years. 39.4%, 41.3% in 5 years, and 35.4%, 35.9% in all, respectively. The results suggest that the two diag-nostic criteria of the severe early childhood caries yield almost the same results.

뇌실내출혈로 인한 급성 수두증에서 관찰된 해리증후군

김광기,이경민,이정주,오종배,안태범,정상욱,남현우,박성호 대한신경과학회 1999 대한신경과학회지 Vol.17 No.5

양극성 장애 1형에서 종양괴사인자 베타 유전자 다형성

전태연,이경욱,배치운,김원,우영섭,채정호,박원명 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.6

Objectives : Bipolar disorder is known to have a high genetic predisposition. Recently, the main focus of etiologic studies in bipolar disorder has been concentrated on molecular genetic approach including gene polymorphism analysis. The present study was conducted to investigate whether TNFB polymorphism is associated with bipolar I disorder in the Korean population. Methods : 89 bipolar I disorder patients diagnosed by DSM-IV criteria were assigned as the patient group and 202 normal population, matched on age and sex from Catholic hemopoietic stem cell bank (Seoul, Korea), were enrolled as the control group in this study. Genotyping was performed by a polymerase chain reaction-restriction fragment length polymorphism method. All data was analyzed by x² test. Results : There were no significant differences in frequency of TNFB*1/1,TNFB*1/2 and TNFB*2/2 between bipolar I disorder patient group and normal control group. The frequency of TNFB*1 was not statistically different between bipolar I disorder patient group and normal control group. Conclusion : The difference of frequency in TNFB*1/TNFB*2 gene between the bipolar I disorder gropup and the normal contro1 could not be verified. The present result suggested that the gene polymorphism of TNFB may not play a significant role in susceptibility to bipolar I disorder. Studies with a larger number of subjects from different ethnic backgrounds, considring clinical phenotype and controlling various factors, should be launched to further determine the role of TNFB in bipolar I disorder.