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정택상,강길전 충남대학교 의과대학 지역사회의학연구소 1984 충남의대잡지 Vol.11 No.1
The effecs of hydrogen ion concentration changes on the contractility as well as patterns of contraction to hormones were investigated in the isolated rabbit uterine muscles. Contractility was recorded on a Physiography with force transducer by means of Magnus method in sodium lacate Ringer's solution used were normal (pH 7.4), acidic (pH 6.3), and alkaline (pH 9.4), were titrated by 0. 01 N HCI or 0. 01 N NaOH solution respectively. Used hormones and its doses were 0.1ug/ml epinephrine, 50 mu/ml oxytocin, 30ug/ml and 100 pg/ml prostaglandin F_2a and prostaglandin E_2. Obtained results are summerized as follows: 1. Increased hydrogen ion concentration inhibited the contractility of uterine muscle, and dereased concentration increased the motility. 2. Decreased hydrogen ion from pH 7. 4 to pH 9. 4 increased the tension of the uterine contraction to 215±40%. 3. Epinephrine increased the uterine contractility in each pH. In pH 7. 4, the contraction tension of the uterine muscle was increased to 510±65% of the control value, but in pH 6.3 and 9.4, increased contraction tension were significantly lower than pH 7. 4 (p<0.01). 4. The increased contraction tension of oxytocin in pH. 7.4 was 197±25% of the control value In pH 6. 3, the increased contraction tension was significantly lower than pH 7. 4 (p<0.01), but in pH 9.4, the increased contraction was significantly higher (p<0.01). 5. Prostaglandin F2α and E2 increased the contraction tension to 305±34% and 391±73% in pH7. 4. But in pH 6. 3 and 9.4 were lower increased than pH 7.4(p<O.01).
Four solutions for 2m-Laplacian jumping problem crossing two eigenvalues
정택선,최규흥 장전수학회 2021 Advanced Studies in Contemporary Mathematics Vol.31 No.3
This paper is dealt with 2m-Laplacian jumping problem with nonlinearities crossing eigenvalues by using geometric mapping on the finite dimensional reduced sub- space. We get one theorem which shows at least four solutions for 2m-Laplacian jumping problem with nonlinearities crossing two eigenvalues. We obtain this result by finite dimensional reduction method and geometric mapping on the finite reduced subspace.
The study of the system of nonlinear wave equations
정택선,최규흥 충청수학회 2007 충청수학회지 Vol.20 No.3
We show the existence of the positive solution for the system of the following nonlinear wave equations with Dirichlet boundary conditions $$u_{tt}-u_{xx}+av^{+}=s\phi_{00}+f,$$ $$v_{tt}-v_{xx}+bu^{+}=t\phi_{00}+g,$$ $$u(\pm \frac{\pi}{2},t)=v(\pm \frac{\pi}{2},t)=0,$$ where $u_{+}=\max \{u,0\}$, $s$, $t\in R$, $\phi_{00}$ is the eigenfunction corresponding to the positive eigenvalue $\lambda_{00}=1$ of the eigenvalue problem $u_{tt}-u_{xx}=\lambda_{mn} u$ with $u(\pm \frac{\pi}{2},t)=0$, $u(x,t+\pi)=u(x,t)=u(-x,t)=u(x,-t)$ and $f$, $g$ are $\pi$-periodic, even in $x$ and $t$ and bounded functions in $[-\frac{\pi}{2},\frac{\pi}{2}]\times [-\frac{\pi}{2},\frac{\pi}{2}]$ with $\int^{\frac{\pi}{2}}_{-\frac{\pi}{2}}f\phi_{00}=\int^{\frac{\pi}{2}}_{-\frac{\pi}{2}}g\phi_{00}=0$.
고등학생이 지각한 부모양육태도 및 부모-자녀 간의사소통 유형과 학교생활적응과의 관계에서 또래애착의 매개효과
정택용 한국청소년학회 2015 청소년학연구 Vol.22 No.8
This study aims to understand mediating effects of peer attachment on how parenting attitudes and communication types perceived by high school students would affect school adjustment. According to findings of the research, the peer attachment was observed to have mediating effects. To be specific, the study confirmed that the peer relationship comes up with full mediation in relation to how the parenting attitudes are connected to the school adjustment but regarding the teacher relationship, the school environment and the academic work relation, the peer relationship was reported to do partial mediation. In addition, even when it comes to this relation with the parent-child communication types, the peer relationship works as a complete mediating factor but in terms of the teacher relationship, the school environment and the academic work relation, the study learned that the peer relationship provides partial mediation. Based on what has been learned so far, the study discussed implications and limits of the research itself as well as directions for follow-up studies. 본 연구의 목적은 고등학생이 지각한 부모양육태도와 의사소통 유형이 학교생활적응에 미치는 영향에서 또래애착의 매개역할을 파악하는 것이다. 이를 위해, 경기도에 소재한 2개 고등학교에 재학 중인 남학생과 여학생 467명을 대상으로 설문조사를 실시하였다. 분석결과, 부모양육태도 및 부모-자녀 간 의사소통 유형이 고등학생들의 학교생활적응에 유의미하게 설명하였으며, 고등학생의 학교생활적응은 또래애착이 모두 매개영향을 미치는 것으로 나타났다. 구체적으로, 부모양육태도와 학교생활적응관계에서 교우관계는 완전매개 하였고, 교사관계, 학교환경 그리고 학업관계에는 부분매개를 하였으며, 또한 부모-자녀 간 의사소통 유형과의 관계에서도 교우관계는 완전매개 하였고, 교사관계, 학교환경 그리고 학업관계에서 부분매개 한 것으로 나타났다. 이러한 결과를 토대로 본 연구의 시사점과 제한점, 후속 연구방향에 대하여 논의 하였다.