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미시교통시뮬레이션모형을 이용한 교통안전기반 무통제 교차로 서비스수준 분석 연구
안현경 ( Ahn Hyun-kyung ),이건일 ( Lee Gun-il ) 한국도로교통공단 2013 교통안전연구 Vol.32 No.-
도로용량편람에서는 무통제 교차로 서비스수준의 기준을 상충횟수로 제시하고 있지만 상충에 대한 명확한 기준과 측정방법을 제시하고 있지 않아 적용에 어려움이 있다. 따라서 본 연구에서는 미시교통시뮬레이션 모형을 활용하여 상충을 측정하는 방법을 제시하고, 그에 적합한 서비스수준 판정기준을 정립하고자 하였다. 수원시 화서 2동에 위치한 무통제 교차로의 기하구조와 교통량을 조사하여 VISSIM으로 구현하였으며 정산을 통해 네트워크를 구축하였다. 95개의 교통량 시나리오를 작성하여 시뮬레이션을 수행 및 분석하였으며 SSAM을 통해 상충횟수를 도출하였다. 또한 산출된 상충횟수와 교차로 진입 교통량과의 관계를 이용하여 도로용량편람에서와 같이 주방향 교통량 비율에 따라 3개의 그룹으로 구분하여 각각 선형회귀식으로 기울기를 구하고 그에 적합한 새로운 서비스수준 기준을 제시하였다. 미시교통시뮬레이션 모형을 이용하여 상충을 분석하는 것에 대해서는 아직까지 논란이 있을 수 있으나, 본 연구는 기존 도로용량편람에서 명확하지 않았던 상충의 개념을 명확히 정의하고, 주방향 교통량 비율에 따른 상충패턴을 확인하였으며, 그에 따른 서비스수준 기준을 제시하였다.
임신낭내 무태아와 유태아의 유산아 염색체 분석 : 무태아 임신의 발생은 염색체 이상과 관련 있는가 ?
양광문(Kwang Moon Yang),안현경(Hyun Kyong Ahn),유근재(Keun Jai Yoo),송인옥(In Ok Song),김진영(Jin Yeong Kim),송지홍(Ji Hong Song),강인수(Inn Soo Kang),전종영(Jong Young Jun),궁미경(Mi Kyung Koong),최범채(Bum Chae Choi) 대한산부인과학회 2002 Obstetrics & Gynecology Science Vol.45 No.4
Objectives : Approximately 15-20% of all clinically recognized pregnancies result in spontaneous abortion between 8 and 12 weeks. In some early abortus only the extra-embryonic components of the conceptus survive, either as fragments of placenta or as empty gestational sac, and these have been termed ‘anembryonic pregnancies`. Despite their common occurrences, the etiology of anembryonic conceptuses is poorly understood. The purpose of this study was to evaluate whether chromosomal abnormalities relate to a role in anembryonic pregnancy. Materials and Methods : The study, that consisted of 143 pregnancies from chromosomally normal couples that aborted in first trimester period between January 1, 1994 and December 27, 1997, had chromosomal analysis performed on the products of conception and had ultrasonographic examination prior to spontaneous abortion. The tissue was processed and analysed using standard G-banding cytogenetic techniques with long-term cultures. Results : The patient characteristics of the anembryonic pregnancy were not significantly different from those of the embryonic pregnancy. Among products of conception from embryonic pregnancies, 45% (52/115) had normal chromosomal analyses and 55% (63/115) had abnormal chromosomal analyses. Products of conception from anembryonic pregnancies resulted in 54% (15/28) of abnormal chromosome analyses and normal chromosomal analyses resulted in 46% (13/28) (p>0.05, Chi-square test). The frequency of aneuploidy and polyploidy were not different between products of conception from anembryonic pregnancy and embryonic pregnancy. Also, the gender ratio of euploid spontaneous pregnancy losses showed similar in this study. Conclusion : There are no differences in frequency of abnormal karyotypes in products of conception from anembryonic pregnancies compared with miscarriage after the demonstration of fetal pole. If further studies are need for the evaluation of these etiologies, and then immuno-molecular studies in early placental tissues from anembryonic pregnancy might be helpful.
임상 ; 한국 마더세이프 전문 상담 센터의 수유부 약물 상담 내용 분석; 5년간의 경험
육지형 ( Ji Hyoung Yook ),안현경 ( Hyun Kyung Ahn ),한정열 ( Jung Yeol Han ),한유정 ( You Jung Han ),김윤영 ( Yun Young Kim ),안계형 ( Gye Hyeong Ahn ),이시원 ( Si Won Lee ),김민형 ( Min Hyoung Kim ),정진훈 ( Jin Hoon Chung ),류 대한주산의학회 2011 Perinatology Vol.22 No.2
목적: 수유 중 약물 노출에 관한 정보는 상당히 부족한 실정이기에 한국 마더세이프 전문 상담 센터는 임산부뿐만 아니라 수유부에게도 약물에 대한 정보 제공 및 상담을 위해 전화 상담 센터를 열었다. 우리는 약물에 노출된 수유부 및 수유아에 대한 5년간의 상담 내용을 검토해 보았다. 방법: 2005년 1월부터 2010년 4월까지 전화 상담 센터를 통해 수유 중 약물 노출에 관해 상담한 수유부를 대상으로 하였고 전화를 통해 추적 관찰을 하였다. 질문 내용으로는 수유부 및 수유아의 인구학적 특성 외에도 약물 노출 후 발생한 증상 및 전반적인 수유에 관한 질문이었다. 결과: 모든 질의에 응답한 총 278 쌍의 수유모 및 수유아에 대해 수유 중 약물 노출에 대한 평가가 이루어졌으며, 이들중 대부분은 약물 노출에도 불구하고 수유 중 심각한 부작용은 없었다고 응답했다. 부작용은 단 3명(1.1%)의 수유아에게만 나타났으며, 20명(7.2%)의 수유부가 젖량 감소를 호소하였다. 상담 후 232명(83.5%)의 수유부는 수유를 지속하였지만, 20명(7.2%)은 일시적으로 수유 중단 후 재개하였고 26명(9.3%)은 영구적으로 수유를 중단하였다. 결론: 수유 중 약물은 수유부 및 영아에게 심각한 부작용을 일으키지는 않지만 많은 약물에 있어 안전성에 대한 정보가 확립되지 않았기에 임상의들은 치료적 이점과 수유아에 대한 위험성에 대해 갈등하게 된다. 이에 우리는 본 상담 내용의 분석을 통해 수유모 뿐만 아니라 임상의에게도 수유 중 약물에 대한 명확한 지식을 제공하고 올바른 수유 문화가 정착되기를 기대한다. Purpose: There is a dearth of information on maternal drug exposure during lactation. The Korean Mothersafe Professional Counseling Center launched helpline to provide information and clinical consultation service on drug safety during lactation as well as in pregnancy. Here, we reviewed our 5 years` experience of counseling with drug exposed breastfeeding mothers. Methods: The questionnaires were given to drug exposed breastfeeding mothers from January 2005 to April 2010 who contacted our helpline and follow-up survey data was collected by phone call. The questionnaires included lists of symptoms that exposed mothers experienced and that was observed in their infants, as well as demographic questions and questions about lactation. Results: A total of 278 mothers completed the survey and lactational exposure was estimated. Majority of them reported that their infants and themselves never experienced serious side effects of drugs during lactation. Only 3 (1.1%) babies reported side effects and 20 (7.2%) mothers reported decreased production of breast milk. Two hundred thirty two (83.5%) mothers continued breastfeeding after counseling. Lactation was stopped temporarily in 20 (7.2%) mothers and permanently in 26 (9.3%) mothers. Conclusion: Most of the drugs exposed during lactation did not cause serious side effects to infants and mothers. As many drugs have inadequate data to assure safety, the clinician is left with a dilemma as to where the balance of risks and benefits lie with respect to the mother and her baby. The author expect that analyses of these counseling will contribute to provide practical answers to clinicians as well as exposed mothers and to establish correct breastfeeding practice.
SDI 관련 국토지리정보원의 연구 및 개발성과 현황 자료 분석
이선교(Sun-Gyo Lee),안현경(Hyun-Kyung Ahn),진희채(Heui-Chae Jin) 대한공간정보학회 2019 한국지형공간정보학회 학술대회 Vol.2019 No.11
국토지리정보원은 우리나라 SDI 구축의 핵심기관으로 다양한 연구 및 개발 사업을 진행하여 왔다. 이러한 연구 성과를 바탕으로 수년에 걸쳐 매우 많은 산출물들을 개발되었다. 본 연구에서는 이렇게 개발된 성과물들을 수집 방법과 분류 체계 도입을 통하여 정형화하는 방식으로 성과물들을 수집하였다. 또 수집된 국토지리정보원의 연구 성과물에 대한 분석을 수행한 후 현황을 파악하여 이를 활용할 수 있는 토대를 마련하고자 한다.
김종하(Kim Jong-Ha),안현경(Ahn Hyun-Kyung) 대한건축학회 2009 대한건축학회논문집 Vol.25 No.11
In this study, it was possible to understand the status of 8 great views of Daegu and Gyeongbuk areas and the analysis of scenic resources in the changes of the times. The conclusions from the study mentioned above are as follows. First of all, we learned that a specific season in Daegu and Gyeongbuk areas doesn't represent the local characteristics through the analysis of environmental elements. Second, the most distance scenic resources has been short distance scenic areas, short-medium distance scenic areas of short distance scenic areas has been increasing gradually in the change of the time. Also, we learned the change trend of distance scenic in the changes of the times that short-long distance scenic areas decreased rapidly in middle years and it increased as set in later years, while other distance scenic decreased gradually. Next, a place where we see views shows the biggest changes of the times than other scenic resources. It can be defined as the scenic resources was the most sensitive changes in times because it was similar in early and later years, but it changed suddenly in scenic Resources during the middle years. Lastly, it is needed a great effort to make the most use of 8 great views because there were not proper results in terms of particular intention and use of them, although there were traditional Palky?ng in local areas and modern Palky?ng being recently setting by a local society together.
일측 난관절제술을 시행한 환자에서 체외수정 시술 후 발생한 동측 원발성 난소 임신
김문영 ( Moon Young Kim ),송현정 ( Hyun Jung Song ),안현경 ( Hyun Kyung Ahn ),이승헌 ( Seung Heon Lee ),유근재 ( Keun Jae Yu ),전이경 ( Lee Kyung Jun ),궁미경 ( Mi Kyung Koong ),강인수 ( In Soo Kang ),양광문 ( Kwang Moon Yang ) 대한산부인과학회 2004 Obstetrics & Gynecology Science Vol.47 No.6
Marcus and Brinsden have reported the first ovarian pregnancy achieved by IVT-ET in 1993. They reported seven cases of primary ovarian pregnancy from 116 ectopic pregnancies after IVF. With advancement of ART, the incidence of ectopic pregnancy is increasing, but ovarian pregnancy is still a rare complication. We report a case of ipsilateral primary ovarian pregnancy after IVF-ET with a patient with previous unilateral salpingectomy with a brief review of literature.
조산 예측을 위한 IGFBP-1 (Insulin-like Growth Factor-binding Protein-1)의 유용성에 대한 연구
최준식 ( Choe Jun Sig ),양재혁 ( Yang Jae Hyeog ),류현미 ( Ryu Hyun Mee ),김문영 ( Kim Mun Yeong ),한정렬 ( Han Jeong Lyeol ),안현경 ( Ahn Hyun Kyung ),신중식 ( Sin Jung Sig ),김주오 ( Kim Ju O ),문명진 ( Moon Myoung Jin ),정진훈 대한산부인과학회 2003 Obstetrics & Gynecology Science Vol.46 No.7
Objective : This study is performed to assess whether detection of phosphorylated insulin like growth factor binding protein-1 (phIGFBP-1) in cervical secretions by a bed side test could be used to prediction preterm delivery in patient with regular uterine contraction. Methods : In our prospective study, 42 women between 20.2 and 36.4 weeks gestation with regular, persistent contraction (2-3/min for 30 min). and 27 women between 22.0 and 37.0 weeks of gestation without symptoms of preterm labor were assessed for presence of cervical phIGFBP-1. Dacron swabs were applied to the cervix and assayed in 5min by using immunochromatography, actim partus test (Medix Biochemica). Results : Of the 42 patients with regular uterine contractions, 22 had a positive actim partus test and 20 had a negative test. Among the 22 patients with positive test, 5 delivered preterm and other 17 patients delivered term (<37 weeks). Among the the 20 women with a negative test, 2 delivered preterm (NS). The mean concentration of phIGFBP-1 in 22 positive patients is 83.8±86.5 ㎍/L and that in 20 negative patients is 2.1±5.0 ㎍/L (P<0.0001) (Table 4). Sensitivity, specificity, false positive, false negative, positive predictive, and negative predictive values were 18.5, 59.6, 40.3, 28.6, 16.7, and 94.9%, respectively. Conclusion : The absence of cervical phIGFBP-1 is seems to be a valuable test in excluding preterm delivery in patients who have regular uterine contractions. The high negative predictive value in this study may enable physicians to prevent over treatment of patients with uterine contractions. Therefore, many unwanted side-effects and complications of potentially hazardous tocolytic therapy can be prevented.
초음파상 자궁경부가 짧은 무증상 임신부에서 조산예방을 위한 자궁경부 원형결찰의 효용성
김민형 ( Min Hyoung Kim ),정진훈 ( Jin Hoon Chung ),최준식 ( June Seek Choi ),안현경 ( Hyun Kyung Ahn ),한정열 ( Jeong Yeol Han ),류현미 ( Hyun Mee Ryu ),김문영 ( Moon Young Kim ),양재혁 ( Jae Hyug Yang ) 대한산부인과학회 2008 Obstetrics & Gynecology Science Vol.51 No.11
Objective: To investigate the clinical efficiency of the cervical cerclage for preventing preterm birth in asymptomatic women who showed a shortened cervix at the second trimester ultrasound Methods: From January 1996 to December 2005, we retrospectively reviewed the medical records of pregnant women who received routine second trimester ultrasound (16~24 gestational weeks) without abdominal pain or bleeding at Cheil general hospital. Women with a short cervical length ≤25 mm were classified into cerclage and expectant group. Women who received cervical cerclage within 1 week after detection of cervical shortening without any change of cervical length and shape were included in cerclage group. Primary outcome was the frequency of delivery before 34 weeks` gestation. Secondary outcome was the most important risk factor for preterm delivery in pregnant women with short cervix. Chi-square test, t-test, and multiple logistic regression analysis were used for statistical analysis. P<0.05 was considered statistically significant. Results: The mean gestational age at ultrasound was 21.6 weeks` gestation. A total of 111 women had short cervix, including 26 that were treated by cerclage and 85 managed expectantly. The proportion of preterm delivery before 34 weeks` gestation was higher in the cerclage group [38% (10 of 26)] than that of the expectant group [20% (17 of 85)], but there was no significant difference (P=0.069). In the univariate analysis, funneling (38% vs 16%, P=0.012) and cervical length ≤15 mm (47% vs 15%, P=0.069) were associated with preterm delivery before 34 weeks` gestation. In the multiple logistic regression analysis, a cervical length ≤15 mm had an adjusted odd ratio of 3.7 (95% CI 1.3~10.6) for preterm delivery before 34 weeks`s gestation. Conclusions: These data suggest that cerclage in asymptomatic woman with a short cervix in the second trimester ultrasound does not prevent preterm delivery before 34 weeks of gestation. Woman with extremely shortened cervical length ≤15 mm needs intensive management for prevention of preterm delivery.