선박전용 구조해석 시스템(SeaTrust-Holdan) 개발 현황 및 향후 방안

이정렬,박호균,도형민,Lee, Jeong-Ryeol,Park, Ho-Gyun,Do, Hyeong-Min 대한조선학회 2008 大韓造船學會誌 Vol.45 No.4

한국과 미국 50~64세 성인의 예방적 건강행위 비교

이정렬,김정애,김수희 한국지역사회간호학회 2013 지역사회간호학회지 Vol.24 No.2

Purpose: The purpose of this study was to compare Preventive Health Behaviors (PHBs) in adults in Korea and the United States and identify factors influencing PHBs. Methods: This was a secondary data analysis study using data from the 2008 Korean National Health and Nutrition Examination Survey and the 2008 USA Behavioral Risk Factor Surveillance System. The PHBs were predicted using multiple linear regression analysis. Results: 1) The total score of PHBs was significantly higher in American males (5.11) than in Korean males (4.78). There was also a significant difference between Korean females’ total score (6.57) and American females’(6.75). 2) Age,marriage, monthly income, subjective health status, and cardiovascular disease were significant factors of PHBs in Korean males (p<.001). However, age, marriage, education, monthly income, health insurance, subjective health status, and cardiovascular disease were significant factors in American males (p<.001). In Korean females,only age and education were significant predictors (p<.001). However, six variables(age, marriage, education,monthly income, health insurance, and subjective health status) were significant predictors in American females (p<.001). Conclusion: There were different variables in predicting PHBs between Koreans and Americans. Each country should focus on those significant predictors to promote the PHBs for adults.

Pregnancy Outcomes of Different Methods for Multifetal Pregnancy Reduction: A Comparative Study

이정렬,Seung Yup Ku,,서창석,Ki Chul Kim,김석현 대한의학회 2008 Journal of Korean medical science Vol.23 No.1

The purpose of this study was to evaluate the outcomes of various methods of multifetal pregnancy reduction (MFPR) and to determine which method produces better outcomes. One hundred and forty-eight patients with multiple pregnancies resulting from assisted reproduction programs and underwent MFPR were included. According to the use of potassium chloride (KCl), patients were divided into ‘KCl’, and ‘non- KCl’ groups, and based on gestational age at the time of procedures, patients were divided into ‘Early’ (before 8 weeks of gestation) and ‘Late’ (at 8 weeks or later) groups. Firstly, to clarify the effect of each component of MFPR procedure, data were analyzed between ‘KCl’ and ‘non-KCl’ groups, and between ‘Early’ and ‘Late’ groups with adjustments. Secondly, comparison between ‘Early, non-KCl’ and ‘Late, KCl’ groups was performed to evaluate the combinative effect of both components. Non-KCl groups showed a significantly higher take-home-baby rate, and lower risk of extreme prematurity and preterm premature rupture of membranes (PPROM) than KCl groups. Early groups showed a lower immediate loss rate than Late groups. As compared with ‘Late, KCl’ group, ‘Early, non-KCl’ group was superior in terms of immediate loss, pregnancy loss, take-home-baby, and PPROM rates. Our data suggest that the ‘early, non-KCl’ method may be a better option for MFPR.

Successful in Vitro Fertilization and Embryo Transfer after Transplantation of Cryopreserved Ovarian Tissue: Report of the First Korean Case

이정렬,이다용,박수현,백은찬,김슬기,지병철,서창석,김석현 대한의학회 2018 Journal of Korean medical science Vol.33 No.21

For patients at risk of premature ovarian failure with cancer treatment, it is an important option to re-implant the ovarian tissue (OT) after cryopreservation to preserve endocrine function and fertility. With this technique, about 30% of pregnancy success rate and about 90 live births have been reported to date. However, there has been no case report of successful in vitro fertilization (IVF) and embryo transfer (ET) with oocytes collected from transplanted cryopreserved OT in Korea. We report a 30-year old woman with rectal cancer who underwent IVF and ET after cryopreserved OT thawing and re-implantation. She has been diagnosed with stage IIIC rectal cancer after surgery, and right ovary was removed and cryopreserved between cycles of chemotherapy. After completion of chemotherapy and radiotherapy, the patient underwent orthotopic transplantation of cryopreserved OTs. Three months after transplantation, the serum follicle-stimulating hormone level decreased from 91.11 mIU/mL to 43.69 mIU/mL. Thereafter, the patient underwent 11 ovarian stimulation cycles, and in 7 cycles, follicle growth was observed at the OT graft site. In one of these cycles, the oocyte was successfully retrieved and one embryo was transplanted after IVF. The patient was not pregnant, but the cryopreservation of OT can save the fertility after anticancer chemotherapy.

이어도 기지에서 관측된 파랑 자료로부터 주변 대표파랑 자료로의 복원기술 검토

이정렬,이동영 한국수자원학회 2004 한국수자원학회 학술대회 Vol.2004 No.1

Development of Weakly Nonlinear Wave Model and Its Numerical Simulation

이정렬,박찬성 한국해안해양공학회 2000 한국해안해양공학회 논문집 Vol.12 No.4

약비선형 완경사 방정식이 Galerkin 방법에 의하여 연속방정식으로부터 직접 유도되었으며 평균수면에서의 유속으로 표현된 운동방정식과 함께 사용된다. 두 방정식으로부터 수면변위 하나의 함수로 표현된 수식이 또한 유도되었으며 선형형은 Smith and Sprinks(1975)에 의하여 제안된 식과 일치하였고 천해, 천이영역, 심해 조건에 대하여 각각 Airy(1845), Boussinesq. Stokes의 2차 파랑과 비교되었다. 본 연구에서 유도된 비선형 파랑 방정식은 각 방향에 대하여 tridiagonal matrix를 얻기 위하여 근사적인 인수분해법으로 차분된다. 실험을 통하여 수립된 비선형 파랑 모형의 재현 능력을 검토하였으며 대체로 만족스러운 결과를 얻었다. A weakly nonlinear mild-slope equation has been derived directly from the continuity equation with the aid of the Galerkin's method. The equation is combined with the momentum equations defined at the mean water level. A single component model has also been obtained in terms of the surface displacement. The linearized form is completely identical with the time-dependent mild-slope equation proposed by Smith and Sprinks(1975). For the verification purposes of the present nonlinear model, the degenerate forms were compared with Airy(1845)'s non-dispersive nonlinear wave equation, classical Boussinesq equation, andsecond¬order permanent Stokes waves. In this study, the present nonlinear wave equations are discretized by the approximate factorization techniques so that a tridiagonal matrix solver is used for each direction. Through the comparison with physical experiments, nonlinear wave model capacity was examined and the overall agreement was obtained.

綜合病院에서의 藥品의 在庫量管理를 위한 考察

李丁烈 한국병원약사회 1986 병원약사회지 Vol.3 No.2

초고속 광대역 파장 가변 광섬유 링 레이저 구현

이정렬,이승우,엄진섭 강원대학교 정보통신연구소 2002 정보통신논문지 Vol.6 No.-

In this paper, we demonstrate a tunable wavelength erbium-doped fiber ring laser. It's tuning interval can be controlled as fine as hundreds of picosecond by using a tunable filter of Fiber Reflection Mach-Zehnder Interferometer with gain-transparent SOA within one arm. And a wavelength tuning range over 17㎚ can be achieved by adjusting the power of 1310㎚ pump light into SOA. Narrow linewidth less than 0.08㎚ and SMSR of more than 30dB is obtained with single-mode operation.

Factors Influencing Stress Coping Behaviors of Elementary Students in Korea

이정렬,이규영,전경미,박소현,홍윤미,이현경 한국보건교육건강증진학회 2009 보건교육건강증진학회지 Vol.26 No.5

Objective: The purpose of this study was to examine factors influencing stress coping behaviors of elementary students in Korea. Methods: This study used a descriptive comparative survey design. A total of 1,161 elementary students voluntarily participated in the study from 10 schools at three regional levels (large and medium-sized cities, and rural towns). Coping behaviors were measured by the modified Ways of Coping Checklist. The data were analyzed using descriptive statistics, t-test, ANOVA, and multiple regression. Results: The most commonly used stress coping behavior reported by the participants was mystic coping, followed by positive coping, and negative coping. Students living in the large city and female students tended to use more coping behaviors than students living in the medium-sized city or rural towns and male students, respectively. Conclusions: Elementary students who are males, dissatisfied with their lives, or living in large cities or rural towns tended to be at risk for poor coping. There were differences in factors influencing coping behaviors by type of coping behaviors. An approach to building a successful coping behavior that is specifically tailored to the gender subsets of population and region-specific social and physical environment is recommended. Objective: The purpose of this study was to examine factors influencing stress coping behaviors of elementary students in Korea. Methods: This study used a descriptive comparative survey design. A total of 1,161 elementary students voluntarily participated in the study from 10 schools at three regional levels (large and medium-sized cities, and rural towns). Coping behaviors were measured by the modified Ways of Coping Checklist. The data were analyzed using descriptive statistics, t-test, ANOVA, and multiple regression. Results: The most commonly used stress coping behavior reported by the participants was mystic coping, followed by positive coping, and negative coping. Students living in the large city and female students tended to use more coping behaviors than students living in the medium-sized city or rural towns and male students, respectively. Conclusions: Elementary students who are males, dissatisfied with their lives, or living in large cities or rural towns tended to be at risk for poor coping. There were differences in factors influencing coping behaviors by type of coping behaviors. An approach to building a successful coping behavior that is specifically tailored to the gender subsets of population and region-specific social and physical environment is recommended.

철재형 이안제 설계기법 연구 III. 투과성 철재형 이안제 후면에서의 해저면 변화

이정렬,권혁민,이주용 한국방재학회 2011 한국방재학회논문집 Vol.11 No.6

In order to solve various problems associated with gravity-type breakwaters, the permeable breakwaters are recently taken into account as an alternative tool to control wave heights to an acceptable level. In particular, they are favored from the point of view of coastal environment, since they do not in general partition the natural sea. In this study, therefore, we present a morphodynamic model applied to scattering wave fields. The numerical solutions are compared with experimental data on wave profiles and morphological change rates under a surface-piercing breakwater system. Our numerical study involves several modules: 1) nonlinear wave dynamics analyzed by a plane-wave approximation, 2) suspended sediment transport combined with sediment erosion-deposition model, and 3) concurrent morphological changes. Scattering waves are solved by using a plane wave method without inclusion of evanescent modes.