• Journal of Welding and Joining
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• 제29권5호
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• pp.99-105
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• 2011

In this study, effect of Si content on nugget diameter in electric resistance spot welded dual-phase(DP) steel was investigated. The cold rolled DP steels with different Si content (0.5, 1.0, 1.5, 2.0 wt.%) were used and thickness of those sheet was 1.2mm. With increasing Si content, nugget diameter was increased at the same welding current. This is attributed to increase of heat input result from high resistivity. Also, nugget diameter was increased with an increase in Si content for the same heat input. For this reason, the melting point of DP steel is lowered with an increase in the Si content. And solid DP steel can easily be transformed to a liquid phase because the low melting point. Finally, a prediction formula for the nugget diameter(N.D.) could be obtained in terms of heat input(Q) and melting point(M.P) as follows: N.D.(mm) = 0.11Q(J) - 0.0031 M.P.($^{\circ}C$) + 0.32.

• 여성건강간호학회지
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• 제25권2호
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• pp.182-193
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• 2019

Purpose: The purpose of the study was to identify effects of anxiety, social support, and Taegyo practice toward maternal-fetal attachment in pregnant women having an abortion. Method: Participants included 99 pregnant women having an abortion, who participated in this study. Collected data were analyzed using descriptive statistics, t-test, ANOVA, Pearson's correlation, and multiple regression with the SPSS WIN 23.0 program. Results: Maternal-fetal attachment was significantly negatively correlated with anxiety, and significantly positively correlated with social support and Taegyo practice. Spousal support and Taegyo practice, explained 43.8% of participants' maternal-fetal attachment. Conclusion: Results indicate that less anxiety and more social support, and Taegyo practice in pregnant women having an abortion, were associated with stronger maternal-fetal attachment. To strengthen the maternal-fetal attachment of pregnant women having an abortion experience, it would be necessary to develop and implement the Taegyo program, focusing on practicing Taegyo-related encouragement. Additionally, it is recommended that nursing intervention is provided, to encourage families to participate in the Taegyo practice together throughout the gestational period, and to maintain a positive relationship among partners.

• 한국산학기술학회논문지
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• 제15권4호
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• pp.2179-2188
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• 2014

본 연구에서는 임부의 스트레스, 부부친밀도, 가족지지 및 피로 정도를 파악하고, 임신 중 스트레스에 영향을 미치는 요인을 확인함으로써 향후 임신으로 인한 신체적, 정신적 변화에 따른 적응을 돕는 간호중재프로그램의 기초자료를 제공하고자 시도되었다. 본 연구에 참여한 임부 185명의 부부친밀도와 가족지지 및 스트레스 정도는 각각 3.17점(점수범위 1~4), 4.97점(점수범위 1~6), 2.80점(점수범위 1~5)으로 중간이상의 점수를, 피로 정도는 3.01점(점수범위 1~4)으로 다소 높았다. 임부 스트레스 정도는 산과력, 임신 중 신체적, 심리적 변화에의 적응 정도, 태교 등 산전 정보의 출처에 따라 유의한 차이를 보였으며, 임부의 스트레스는 부부친밀도 및 가족 지지와는 부적 상관관계를, 피로와는 정적 상관관계를 나타내었다. 임부의 스트레스에 영향을 미치는 요인은 가족지지, 피로, 임신으로 인한 신체적, 정신적 변화에의 적응도 및 모유수유 경험 순으로 나타났다. 따라서 임부를 위한 스트레스관리프로그램은 임신으로 인한 신체적, 정신적 변화에 따른 적응을 도울 수 있도록 개발되어야 하며, 가족 지지를 촉진할 수 있는 프로그램 요소를 포함할 때 더욱 효과적일 것이다.

• 한국레이저가공학회지
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• 제7권2호
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• pp.19-26
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• 2004

The effect of shield gas on the weldability, mechanical properties and formability of CO2 laser weld joint in 600MPa grade high strength steel was investigated. Bead on plate welds were made under various welding speed and shield gas. Tensile test was carried out under the load of perpendicular and parallel direction to the weld line, Formability of the joint was evaluated by Erichsen test. As the welding speed increases, the porosity fraction decreases. The porosity fraction in the joint used Ar-$50\%He$ mixed gas as a shield gas was lower than that of the joint used Ar gas. Hardness at the weld metal of full penetrated joint was nearly equal to that of water quenched raw metal. In a tensile test under a perpendicular load to the weld axis, strength and elongation of joint produced by optimum condition were nearly equal to those of base metal. However, the strength of joint in a tensile test under a parallel load to weld axis was higher than that of raw metal, but the elongation of joint was lower than that of raw metal. Elongation and formability were further increased by the method of using Ar+He mixed gas as a shield gas as compared with Ar gas. Formabilities of joints were recorded ranging from $58\%\;to\;70\%$ of that of base metal with different shield gases.

• 한국콘텐츠학회논문지
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• 제18권2호
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• pp.378-387
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• 2018

최근 4차 산업 혁명이 도래하면서 헬스케어 서비스의 분야가 다시금 주목받고 있다. 그에 따라, 스마트제품들을 통한 개인 맞춤화 된 의료 시스템이 다양한 형태로 등장하고 있다. 웨어러블 테크 및 센서 시스템의 활용으로 타인의 도움 없이 스스로 언제 어디서든지 건강관리와 모니터링이 가능해졌다. 하지만, 임산부를 위한 헬스케어 서비스는 매우 부족한 실정이다. 저출산으로 인하여 산부인과 수도 격감하면서 몸이 불편한 임산부를 둘러싼 환경은 더욱 열악해지고 있다. 임산부는 임신으로 인하여 편안한 수면 세를 취하기 힘들다. 소음, 온도, 습도 등 다양한 환경적 요인이, 더불어 임산부 수면의 질을 저하시켜 행복한 태교를 저해한다. 본 연구는 이러한 문제점을 해결하고자 임산부의 건강을 위해 좋은 수면 자세의 정보와 향상된 수면 환경을 제공하여 수면관리가 가능한 UI 디자인 개발에 목적이 있다. 이를 통해 4차 산업시대의 센서 기술을 적용하여 임산부의 수면의 질과 삶의 질을 극대화 시켜 줄 것을 기대한다.

• 아동학회지
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• 제3권
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• pp.49-62
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• 1982

This is a study to analyze rural area women's perception and practice of prenatal care, which is the fundamental of the education of children. Further, it was aimed to provide basic data for ideal childbirth, upbringing and household management process. For that object, questionnaires were distributed to women living in Yongdong region to judge the level of general understanding on prenatal care. Research was done from three different aspects; dietary life, emotion control and health management. Percentages were drawn out to see the general tendency. The following results were discovered from data analysis: 1. Most subjects of the survey knew well about prenatal care. They had acquired that knowledge from their parents. Most thought that prenatal care is necessary. They answered that they think prenatal care has more or less effect on the fetus. The first dime they thought about prenatal care was after they found that they were pregnant. 2. The subjects knew well about dietary needs for pregnant women carried out much of what they knew. Intake of sufficiently nutritious food is somewhat difficult, but foods that are regarded as bad were avoided thoroughly. It appears that most women have much concern about what they eat during pregnancy. 3. Most of the subjects understood that the emotional stability is necessary but it wasn't put into practice so well as in dietary life. Especially, attitudes connected with emotional development like, "Look or hear only what is good (for the fetus)" were practised little. Efforts for self-restraint as "Not to hate or pick out others' defects or talk bad about others" were appeared to be great, and it is practised well, too. 4. The subjects were well-informed on health area, but practised little. Behaviors for health improvement as to "Lead a regular daily life for health" or "Not to take a long trop" were practised very faithfully. The results of the survey showed that passive attitudes related to tabooed food, self-abstinence and cautions for bodily safety were prevalent; more positive and progressive disposition missing. That is, full perception and active practices for caloric intake, emotional improvement and physical strength development are needed.

• 가족자원경영과 정책
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• 제10권1호
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• pp.17-32
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• 2006

This essay has attempted to document the actual behavior patterns and the social networks related to the child delivery in the pre-industrial Korean society. We interviewed 30 women who had given birth to their first child during the 1930s and the 1940s in order to accumulate data related to son-prayer rites, prenatal care and food avoidance, sacred-string culture, and other incantation rituals. The characteristics of the social relationships with the person who had assisted the delivery and the recovery were also analyzed in terms of kinship networks. The results are as follows. First, there was a big gap between knowledge and the actual practices in birth rituals and customs. We assume that this is due to the adverse social-economic conditions at that time which may have restricted the actual performances of these customs. Second, there were almost no differences of the performance of these' birth customs between the urban areas and the rural areas. Third, the people who assisted the delivery were women who were mostly from the husband's family. Help from the wife's family were quite exceptional. Finally, it has been found out that only about half of the women who were interviewed performed the well-known custom of three-week after-birth confinement.

• 한국레이저가공학회지
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• 제10권3호
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• pp.25-32
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• 2007

The effect of welding speed on the weldability, microstructures, hardness, tensile property of Nd:YAG laser welding joint in 600MPa grade precipitation hardening high strength steel was investigated. A shielding gas was not used, and bead-on-plate welding was performed using various welding speeds at a power of 3.5kW. Porosity in the joints occurred at 1.8m/min, but were not observed over the welding speed of 2.1m/min. However, spatter occurred over the welding speed of 6.6m/min. The hardness was the highest at heat affected zone(HAZ) near fusion zone(FZ), and was decreased on approaching to the base metal. The maximum hardness increased with increasing welding speed. The microstructure of FZ was composed of coarse grain boundary ferrite and bainite(upper) but the HAZ near the FZ contained bainite(Lower) and fine ferrite at a low welding speed. With increasing welding speed, ferrite at the FZ and the HAZ became finely and upper binite changed to lower bainite. In a perpendicular tensile test to the weld line, all specimens were fractured at the base metal, and the tensile strength and the yield strength of joints was equal to those of raw material. Elongation was found to be lower than that of the raw material.

• 한국작물학회지
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• 제52권3호
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• pp.289-295
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• 2007

본 연구는 적변 유발 세균에 의해 발생하는 적변삼과 polyphenol 및 polyphenol oxidase 활성과의 관계를 조사하였으며, 이는 다음과 같다. 1. 적변 유발 균주를 상처낸 건전 인삼 외피에 접종하여 무처리구와 비교하였을 때, 접종일수의 증가에 따라 Hue angle값이 접종 후 1일 101.2, 10일 95.9, 20일 90.1, 30일 60.9로 적색으로 변화되었다. 2. Lysobacter gummosus, Pseudomonas veronii 및 Agrobacterium tumefaciens 균주를 인삼의 상처부위에 접종하였을 때, 총페놀의 함량은 일수가 경과할수록 증가하였다. 3. Lysobacter gummosus, Pseudomonas veronii 및 Agrobacterium tumefaciens 균주를 상처낸 인삼에 접종하였을 때 페놀함량의 증가와 함께 효소의 활성이 증가하였으나 단백질당 PPO의 활성은 감소하였다.

• 대한한방부인과학회지
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• 제15권4호
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• pp.149-162
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• 2002

The fetus is greatly influenced by mother's health condition and her environment. So in our traditional society, the prenatal care is regarded as important for generations to birth of sound baby in mind and boy. Purpose : We aimed to reserch what kind of mother's conditions can be more influential to infant allergic disease among traditional prenatal care. Method : We investigated 91 patients who answered by a questionnaire at Dept. of Pediatrics, Oriental Hospital of Dae-jeon University. We divided patients into two groups, A(normal group;43) and B(allergic disease group;48) and analyzed those. Results : The pregnant women in the group B, generally have worse health conditions and are under the stress mentally and cannot get enough nutrition because of morning sickness and digestive trouble, but take more pungent and powdered food than the group A. Specially, the result is significant in anger and worry among other mental stresses and in digestive trouble and threatened abortion among other health conditions(according to order: p<0.001, p<0.05, p<0.01, p<0.001). We can see that pregnant woman's peaceful mentality and enough nutrition intake are most important to birth of sound baby in mind and also we can see that pregnant woman's regimen has influence on not only infant disease but also character and the infant allergic diseases are related to inheritable factor.