• 한국수학사학회지
• /
• 제17권1호
• /
• pp.109-118
• /
• 2004

This study estimated direct factors that have effect to completion degree of game, and we constructs structural equation model that can evaluate completion degree of game using empirical analysis. For it, we obtained weight of components of game development by eigenvector method for analytic hierarchy process. Using calculated weight, we also let that components of game development is observating variable of X, and genre of game is observating variable of Y. And we constructs structural equation model with LISREL program

• 대한가정학회지
• /
• 제32권3호
• /
• pp.121-134
• /
• 1994

This study was to examine the factors effecting the role conflicts of dual-earner couples. The sample consisted of 168 husbands and wives living in Pusan. The findings of this study were as follows; 1. Husbands' role conflicts were negatively related to cohesion wives' role conflicts were negatively related to adaptability. 2. Husbands' role conflicts were significantly affected by spouses' support time spent at work cohesion and the youngest child age. 3. Wives' role conflicts were significantly affected by spouses' support adaptability time spent at work and the degree of husbands' support, adaptability time spent at work and the degree of husbands' housework participation.

• 한국수학사학회지
• /
• 제15권2호
• /
• pp.125-134
• /
• 2002

The purpose of this paper is to analyze the the effect on the academic improvement, applying various teaching methods throughout cooperative teaming in small groups to inspire slow-learners'interest on mathematics and impove capability to solve problems and achievement degree of studies. The subject of the study is as follows: 1. What is the difference of students'interest on mathematics between cooperative learning in small groups and large group learning\ulcorner 2. Is there any difference of slow-learners' achievement degree of studies between cooperative learning in small groups and large group learning?

• KDI Journal of Economic Policy
• /
• 제30권2호
• /
• pp.129-155
• /
• 2008

급성상기도감염증에 대한 항생제 처방률은 의료기관의 유형, 표시과목, 의료기관이 위치한 지역 등 여러 요인에 따라 차이를 보인다. 본 연구는 1차 의료기관인 의원들 중 내과, 소아과, 이비인후과 의원의 급성상기도감염증에 대한 항생제 처방률에 환자의 특성과 같은 의학적 요인이 아닌 의원의 수입과 밀접한 관계가 있는 의원 수의 변화(경쟁 정도의 변화)와 같은 경제적 요인이 미치는 영향을 실증 분석하였다. 2006년 건강보험심사평가원에서 발표한 전국 각 의료기관의 급성상기도감염증에 대한 항생제 처방률을 주 자료원으로 하여, 경쟁지수를 두 가지 형태로 정의하고 수요 측면을 나타내는 변수와 공급 측면을 나타내는 변수를 통제변수로 선정하여 회귀분석을 실시한 결과 경쟁지수를 어떤 형태로 정의하든, 의원이 위치한 지역의 경쟁정도는 의사들의 항생제 처방률에 통계적으로 유의한 영향을 미친 것으로 분석되었다. 이러한 결과는 시장지역 내 경쟁 정도의 변화와 같은 경제적 요인이 의사들의 처방행태에 영향을 미치는 요인 중 하나라고 해석할 수 있다. 아울러 인과관계의 방향과 관련하여, 의사가 진료하는 지역의 경쟁 정도가 높아질수록 항생제 처방률이 통계적으로 유의하게 높아지는 것으로 나타났다. 이러한 결과는 의사의 진료수입 감소를 초래할 것으로 예상되는 시장환경의 변화에 대해 자신의 진료수입을 예전상태로 보전하기 위해 불필요한 의료서비스 소비를 유도해서 얻는 편익(소득효과)이 이를 위해 자신이 지불해야 할 비용(대체효과)보다 크기 때문에 항생제 처방률을 증가시킨 것으로 해석할 수 있으며, 또한 경제적 유인체계의 변화에 대하여 의사의 진료행태가 영향을 받을 수 있음을 실증적으로 뒷받침하는 것으로 이해할 수 있을 것이다.

• 소음진동
• /
• 제3권2호
• /
• pp.145-153
• /
• 1993

The Substructural Synthesis Method is effectively used for the calculation of complex structures. An alternative substructural synthesis, using spatial properities which can be directly inedtified from the frequency reponse function, was proposed. It has been shown that the rotational degree of freedom in the coupled region should be required to synthesize the substructures and the residual effect in the rotational degree of freedom should be considered. Through the simulations and experiments, this alternative was proven to be useful for the dynamic analysis of complex structures.

• Archives of Pharmacal Research
• /
• 제26권10호
• /
• pp.855-860
• /
• 2003

The effect of silver sulfadiazine (SSD) on the proliferation of human dermal fibroblast (HDF) was studied to determine the impact of the drug on the wound healing process and dermal mechanical strength. Human dermal fibroblasts were cultured to 80% confluency using DMEM with 10% FBS and viability of the cell was estimated using neutral red assay. In addition, the $2^{nd}$ degree burn wound was prepared on the anterior part of rabbit ear skin and dressings containing SSD were applied for 96 h. Presence of inflammatory cells and degree of re-epithelialization were investigated in the wound. After 15 day of the induction of burn wounds, the treated area was excised and dermal mechanical strength was quantitatively measured with a constant speed tensiometer. SSD was found to be highly cyto-toxic in cultured HDF cells. The topical application of SSD (2%) could control the infection as evidenced by the lack of accumulation of inflammatory cells in histological evaluation. Therefore, these observations suggested that the impairment of dermal regeneration and decreased mechanical strength of dermal tissue was resulted from the cyto-toxic effect of SSD on dermal cells. Since the decreased mechanical strength may lead to reduction in resilience, toughness and maximum extension of the tissue, the identification of optimum dose for SSD that limits infection while minimizes the cyto-toxic effect may be clinically relevant.

• 대한방사선기술학회지:방사선기술과학
• /
• 제40권4호
• /
• pp.647-655
• /
• 2017

본 연구는 은퇴교육필요도와 은퇴교육준비도가 삶의 질에 미치는 영향에서 은퇴준비의 매개효과와 조절변수인 은퇴교육참여도가 어떻게 조절되는지를 파악하고자 수행하였다. 연구대상은 조사의 편리성을 고려하여 유의표집하였으며, 2017년 5월부터 7월까지 충청남도 9시 군 212명의 데이터를 활용하였으며, 남자 58.5% 여자가 41.5%로 남자가 많았으며, 거주지역은 시지역이 76.9%, 군지역이 23.1%로 시 거주자가 많았다 세부연구문제는 첫째로 일반적 특성에 따라 삶의 질의 차이, 둘째로 은퇴준비필요도, 은퇴준비, 은퇴교육, 삶의 질의 상관관계, 셋째로 은퇴교육은 은퇴준비와 삶의 질 간의 간접효과를 조절을 보았다. 연구결과 대상자의 첫째, 일반적 특성에 따른 삶의 질 차이 검증결과 거주지역에 따라서는 시지역에 거주하는 사람이 군 지역에 사는 사람보다, 대학원 졸업이상이 대학이하 집단보다 높았다. 직업에 따라서는 공무원, 회사원이 자영업보다 높았으며, 경제수준과 건강수준에 만족하는 집단이 삶의 질에 만족하는 것으로 나타났다. 둘째, 상관분석결과 은퇴준비와 삶의 질, 은퇴준비 필요도와 양의 상관관계를 나타났다. 또한 삶의 질과 은퇴교육, 은퇴교육 필요도와의 양의 상관관계를 보였으며, 은퇴교육과 은퇴준비필요도에 따라서는 양의 상관관계를 보였다. 셋째, 은퇴교육참여는 은퇴교육 필요도, 은퇴준비도를 거쳐서 삶의 질에 미치는 간접효과를 조절하였다. 즉, 은퇴교육 필요도는 은퇴준비에 영향을 주고 은퇴교육 간접효과에 의해 삶의 질에 영향을 준다. 따라서 은퇴준비에 은퇴교육의 조절된 매개효과가 커지는 것으로 확인되었다. 이는 은퇴교육의 필요성에도 삶의 질은 달라질 수 있다는 것을 알 수 있었다.

• Structural Engineering and Mechanics
• /
• 제53권1호
• /
• pp.17-26
• /
• 2015

The cross sections of hollow cylindrical tubes ovalise under a pure bending condition, and this reduces their flexural stiffness as their curvatures increase. It is important to accurately evaluate this phenomenon, known as the 'Brazier effect', to understand the bending behaviour of the systems considered. However, if the tubes are supported by an elastic medium or foundation, the ovalisation displacements of their cross sections may decrease. From this point of view, the purpose of this research is to analytically investigate the bending characteristics of single- and double-walled elastic tubes contacted by an elastic material by considering the Brazier effect. The Brazier moment, which is the maximum moment-carrying capacity of the ovalised cross section, can be calculated by introducing the strain energy per unit length of the tube in terms of the degree of ovalisation for the tube and the curvature. The total strain energy of the double-walled system is the sum of the strain energies of the outer and inner tubes and that of the compliant core. Results are comparatively presented to show the variation in the degree of ovalisation and the Brazier moment for single- and double-walled tubes.

• 한국재료학회지
• /
• 제26권9호
• /
• pp.493-497
• /
• 2016

This study was carried out to investigate the effect of deformation induced martensite on the damping capacity of Fe-26Mn-4Co-2Al damping alloy. ${\alpha}^{\prime}$ and ${\varepsilon}$-martensite were formed by cold working, and; deformation induced martensite was formed with according to the specific direction and the surface relief. With an increasing degree of cold rolling, the volume fraction of ${\alpha}^{\prime}$-martensite increased rapidly, while the volume fraction of ${\varepsilon}$-martensite decreased after rising to a maximum value at a specific level of cold rolling. Damping capacity was increased, and then decreased with an increasing of the degree of cold rolling. Damping capacity was influenced greatly by the volume fraction of ${\varepsilon}$-martensite formed by cold working, but the effect of the volume fraction of ${\alpha}^{\prime}$-martensite have a actually on effect on the damping capacity.

• Natural Product Sciences
• /
• 제15권3호
• /
• pp.156-161
• /
• 2009

Rubus coreanus, commonly known as 'red raspberry' is used as a traditional oriental medicine in Korea for the management of diseases such as impotence, spermatorrhea and athsma, and for allergies, in combination with other herbal preparations, in many centuries. We undertook a comparison of the hepatoprotective effect of ethanol extracts of the unripe (UREx) and ripe (RREx) R. coreanus extract against acetaminophen (AAP) induced hepatotoxicity in rats. UREx reduced the elevated alanine aminotransferase (ALP), aspartate aminotransferase (AST), total bilirubin (TB), alkaline phosphatase (AP), lipid peroxide and nitric oxide content which had been increased by AAP administration. UREx also increased the cellular glutathione (GSH) content and induced the glutathione-S-transferase (GST), glutathione peroxidase (GSH-Px) content which had been decreased by AAP. RREx did not exhibit strong hepatoprotective effect or antioxidant activity under the same conditions. The experimental results show that the degree of the ripening of R. coreanus affects the hepatoprotective activity in the AAP-intoxicated rats. These findings of a protective mechanism are supportive evidence for the utility of unripened R. coreanus in traditional medicine for liver ailments.