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흡기근육 훈련과 유산소운동의 동시적용이 심폐반응과 폐기능에 미치는 영향
정현진,이대택 한국운동생리학회(구 한국운동과학회) 2012 운동과학 Vol.21 No.3
정현진, 이대택. 흡기근육 훈련과 유산소운동의 동시적용이 심폐반응과 폐기능에 미치는 영향. 운동과학, 제21권 제3호. 373-384, 2012. 흡기근 훈련을 동반한 유산소운동이 흡기근력, 폐기능, 최대산소섭취량(maximal oxygen uptake; VO2max)에 어떠한 영향을 미치는지 연구하였다. 24명의 건강한 대학생이 3 그룹으로 나뉘어 6주간의 실험에 참여하였다. 대상자들은 호흡근육훈련(RTG; n=8), 유산소성달리기훈련(REG; n=8), 호흡근육 및 달리기훈련(BTG; n=8) 그룹으로 나뉘었다. 실험전과 후 폐기능, 최대흡기압력(maximal inspiratory pressure; PImax), VO2max가 평가되었다. RTG는 실험기간 동안 흡기근육훈련 (inspiratory muscle training; IMT) 프로그램에 참여하였으며, PImax 의 50 % 강도로, 하루 2회, 주당 4일, 회당 30회 훈련하였다. REG는 개인별 VO2max의 70-75 % 강도로, 하루 1회, 주당 4회, 회당 30분 달리기 훈련을 하였다. BTG는 같은 기간 동안 IMT와 달리기훈련 모두에 참여하였다. 실험기간 중 대상자들의 체격변인과 폐기능 변인은 변하지 않았다. VO2max는 RTG, REG, BTG에서 각각 6.1±3.3 %, 5.9±6.6 %, 10.0±8.3 % 증가하였고(p< .05), PImax 또한 RTG, REG, BTG에서 각각 21.7±14.3%, 19.7±12.0 %, 27.0±12.1 % 증가하였으나(p< .05), 그룹 간의 유의한 차이는 나타나지 않았다. 결론적으로, 모든 그룹에서 향상이 관찰되었으며, 흡기근 훈련과 유산소운동을 동반한 그룹에서 VO2max와 PImax의 가장 큰 향상을 보였다. Jung, H. J., Lee, D. T. Impact of concurrent inspiratory muscle and aerobic exercise training on pulmonary function and cardiopulmonary responses, Exercise Science, 21(3): 373-384, 2012. The effects of inspiratory muscle training in conjunction with aerobic exercise on inspiratory muscle strength, pulmonary function, and maximal oxygen uptake (VO2max) were examined. Twenty four healthy collegiate men were divided into three groups; respiratory muscle training group (RTG; n=8), running exercise group (REG; n=8), and both respiratory muscle training and running group (BTG; n=8). Their pulmonary function, maximal inspiratory pressures (PImax), and VO2max were assessed before and after intervention. RTG underwent inspiratory muscle training(IMT) with load set to 50 % of PImax, 30 times per session, twice a day, 4 days a week REG ran on a treadmill at 70-75 % of VO2max for 30 min a day, 4 days a week, BTG participated both IMT and the running exercise. Participant`s anthropometric parameters and pulmonary function were not changed. VO2max increased by 6.1±3.3 %, 5.9±6.6 %, and 10.0±8.3 % in RTG, REG, and BTG, respectively (p< .05), and PImax also increased by 21.7±14.3 %, 19.7±12.0 %, and 27.0±12.1 % in RTG, REG, and BTG, respectively, but no group differences were found. Based on the study, although statistically insignificant, BTG showed the biggest increase of VO2max and PImax indicating a possible synergic effect of inspiratory muscle training and aerobic exercise on respiratory responses.
이분척추증 환아에서 비디오요역동학검사의 반복 검사가 필요한가?
정현진,김명주,임영재,홍창희,한상원 대한비뇨의학회 2009 Investigative and Clinical Urology Vol.50 No.10
Purpose: A videourodynamic study is useful for examining the functional and structural problems of the urinary tract simultaneously. Due to its invasiveness, however, it is important to obtain as much information as is possible as the study is being conducted. The purpose of this study was to evaluate the results of a repeated videourodynamic examination in spina bifida children. Materials and Methods: Between January 2005 and July 2006, a total of 48 patients who were diagnosed with spina bifida and underwent repeated videourodynamic studies were enrolled in this study. We compared variables including compliance, involuntary detrusor contraction (IDC), cystometric bladder capacity (CBC), maximum detrusor pressure, and post-voiding residual urine (PVR) between the initial and repeated studies. Results: During the repeated studies, cases of IDC decreased significantly (p<0.05) compared with the initial studies. No other significant differences were found in terms of compliance, CBC, maximum detrusor pressure, and PVR. Conclusions: There were no significant differences in terms of compliance, CBC, maximum detrusor pressure, and PVR between initial and repeated studies. However, the number of patients who had IDC decreased significantly in the second study. Nevertheless, we conclude that the first examination in this study was enough to evaluate the overall function and structure of the urinary tract. We believe that repeat studies are not necessary in children with spina bifida.
정현진,황의창,Do Kyung Kim,강호원,Ja Yoon Ku,Hong Wook Kim,정재흥,Guideline Development Committee in the Kor. Ass. of Urogenital Tract Infection and Inflammation 대한요로생식기감염학회 2020 Urogenital Tract Infection Vol.15 No.3
This article is the last of a series providing guidance for the use of the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) system for rating the quality of evidence and grading the strength of recommendations in systematic reviews and clinical practice guidelines. Formulating recommendations with the applicable evidence can be difficult due to the large and diverse nature of guideline committees. This article describes a simple technique called the GRADE grid for clarifying the opinions from guideline panels, dealing with disagreement, and achieving consensus among guideline panels. The grid may be helpful for any guideline groups who want to use GRADE to develop their guidelines and achieve consensus or understand the patterns of uncertainty that surround the interpretation of scientific evidence.
葛根黃蓮黃芩湯과 疎風活血湯이 HUVEC 내에 MCP-1, ICAM-1, VCAM-1 and eNOS의 유전자 발현량에 대해 미치는 영향
정현진,전상윤,장혜연,김민욱 대한한방내과학회 2020 大韓韓方內科學會誌 Vol.41 No.4
Objectives: The aim of this study was to compare the effects of Galkunhwanglyeonhwanggum-tang (GGT), and Sopunghwalhyeol-tang (SPT) on gene expression of MCP-1, ICAM-1, VCAM-1, and eNOS in human umbilical vein endothelial cells (HUVECs). Methods: HUVECs were treated with GGT and SPT at concentrations of 50, 100, and 200 μg/mL. Gene expression of MCP-1, ICAM-1 ,VCAM-1, and eNOS in HUVECs was analyzed by the polymerase chain reaction (PCR), and electrophoresis was performed to verify the gene expression level. Results: 1. MCP-1 gene expression was more strongly decreased by SPT than by GGT. 2. ICAM-1 and VCAM-1 gene expressions were more strongly decreased by SPT than by GGT 3. GGT significantly increased eNOS gene expression, but SPT did not. Conclusions: These findings suggest that GGT and SPT regulate gene expression related to anti-inflammatory effects in HUVECs. Clinical application of these Korean medicines to diseases related to dyslipidemia, such as cardiovascular disease, will require additional in vivo experiments to verify the anti-inflammatory effects of GGT and SPT.
정현진,최승식 한국정보과학회 2012 한국정보과학회 학술발표논문집 Vol.39 No.1D
본 논문에서는 무선 이동 단말이 이기종 망의 동시 사용을 통해 높은 대역폭을 이용하고 또한 망의 이동이 발생할 때 이기종 망의 동시사용을 통해 손실 패킷을 감소시킬 수 있는 기법을 제안한다. WLAN과 3G망 등 여러 가지의 망을 이용할 수 있는 환경에서 하나의 망을 사용하는 것이 아니라 다중망의 이용을 통해 대역폭을 넓게 사용한다. 핸드오버가 발생하는 경우 기존의 망의 연결을 끊지 않고 지속적으로 연결하기 때문에 망의 이동 과정에서 발생하는 패킷 손실을 감소시킨다. 이를 시뮬레이션을 통해 비교 분석하였고 성능이 향상됨을 확인하였다.
탄소/탄소 복합재 매트릭스 전구체로서의 메조페이스 핏치의 제조 및 특성에 관한 연구
정현진,임연수 한국세라믹학회 1996 한국세라믹학회지 Vol.33 No.12
A study on mesophase pitch as a matrix precursor of carbon fiber reinforced carbon (C/C) composite has been recently presented. This study is concerned with the production of mesophase pitch as matrix precursors for C/C composite from coal tar pitch. A commercial coal tar pitch was heat-treated at 25$0^{\circ}C$ for 2 hours to remove low molecular weight fraction from the pitch then increasing the temperature of the pitch to between 350~45$0^{\circ}C$ to produce mesophase pitch. The pitch was continuously stirred during this time and nitrogen gas was continuously bubbled through the pitch. Spherical and bulk mesophases were formed in the pitch after heat-treatment,. Parent and mesophae pitches were characterized by elemental analysis coke yield solubi-lity in tetrahydrofuran and hexane and an optical microscopy to measure the mesiophase content. It was neces-sary to produce C/C composite that a mesophase pitch with about 30-40 vol% mesophase spherulites can be infiltrated into a fiber preform without a filter effect as a matrix precursor conditions. This condition was satisfied with mesophase pitch heat treated at 40$0^{\circ}C$ for 2 hours. The other heat treatment conditions showed the nuclei of mesophase or bulk mesophae which were not satisfied with the matix precursor condition.
Mixed alkali effect on the luminescence characteristics of color conversion glasses
정현진,전대우,김진호,이영진,이미재,황종희,박현아,임형석,이정수,박태호,신동욱 한양대학교 세라믹연구소 2016 Journal of Ceramic Processing Research Vol.17 No.7
The influence of K2O/R2O (R2O = Na2O+K2O) on some characteristics of color conversion glass were studied using a BaOZnO-B2O3-SiO2glass. One reference glass, comprised of 40 mol% of BaO and 20 mol% of the other three components, wasused, and 5 wt% of an alkali oxide was added to the other five glass samples. The ratio of the alkali oxides used were K2O/R2O (where R2O = Na2O+K2O) 0, 0.25, 0.5, 0.75, and 1. Six color conversion glass samples were prepared by sintering amixture of glass frits and a YAG phosphor. The content of the YAG phosphor was maintained at 5 wt%. The characteristicsof the color conversion glasses, with respect to luminous efficacy, CIE (Commission International de I'Eclairage) chromaticity,CCT (Correlated Color Temperature), and CRI (Color Rendering Index) were analyzed based on PL spectra. Theluminescence properties of the color conversion glass with K2O/R2O = 0.5 were nearly identical to those for the reference glasseven though it contained 5 wt% alkali oxides.