• 한국토양비료학회지
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• 제48권3호
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• pp.213-217
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• 2015

Soil moisture shortage can reduce yield of waxy corn because maize is one of the sensitive crops to the drought stress. Farmers cannot irrigate due to limited water resource and irrigating facilities although applying water is the most effective practice to solve the drought problem. The study was conducted to investigate the pre-treatment effect of salicylic acid on reducing drought damage of waxy corn (Zea mays L.). Salicylic acid at concentration of 0.2 mM was applied at seven-leaf stage or ten-leaf stage three times. Drought stress was imposed by withholding irrigation from 11 days before anthesis to 10 days after anthesis. Application of salicylic acid significantly increased ear length by 11.0~12.3% and yield by 8.8~11.3% compared with non-treated control, indicating that the drought injuries of waxy corn can be alleviated through pre-treatment of salicylic acid at the vegetative stage.

• 한국자연치유학회지
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• 제10권1호
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• pp.10-18
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• 2021

목적: 본 연구의 목적은 새로 개발한 '전인 치유 프로그램'을 행복힐링모임을 통해 수행한 대상자 62명의 스트레스 변화'에 대한 연구를 하는 것이었다. 방법: 전인치유 프로그램을 행복힐링모임에 주당 1회(90분)씩 6회기를 수행하였고, 회기 및단 계별내용을 기록하였다. 결과: 일반인에게 적용할 수 있도록 개발한 전인치유프로그램은 회기별로 '도입-전개-마무리'의 세부적 3단계로 구성되었다. 전인치유요법으로 행복힐링모임 수행 후에 스트레스에 미치는 요인은 사전 평균치에 비해 사후의 평균치는 26.371점으로 유의성이 있게 감소하였다(p < .000). 사회심리적 스트레스의 변화는 사전에서는 34.306점, 사후에는 9.096점으로유의하게감소하였다. 스트레스 대처방식의 변화는 사전에 비해서사후에는 201.661점으로 유의하게 높게 나타났다. 기분 상태 변화는 사전에는 69.451점이었고사후에는 123.983점으로 높게 증가하여 유의한 차이를 보이었다(p < .000). 결론: 전인치유 프로그램을 행복힐링모임에 적용한 대상자에게서는 일반 또는 사회적심리적 스트레스에는 유의하게 감소하였고, 스트레스 대처방식과 기분상태의 변화는 높게 증가하는 경향을 보이었다. 이 결과로 평가할 때에 새 전인 치유요법이 행복힐링모임에 매우 유용한 자연치유적 요법 중의 하나라고 판단되었다.

• 기본간호학회지
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• 제20권4호
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• pp.410-418
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• 2013

Purpose: This study was done to examine the effects of Aroma inhalation therapy on test anxiety, stress and serum cortisol in nursing students. Methods: The study design was a pre posttest randomized design with a pre-survey, a 5-day experimental treatment (2012.11.17-21) and a post survey. Participants were 65 students - 31 in the aromatic inhalation group and 34 in the control group. The pre-survey included general demographic characteristics and test anxiety, stress and serum cortisol levels for all students. The experimental group received the aromatic inhalation using aroma oil (mixed Maychang, lavender, rosewood essence - ratio of 3:5:2). Results: The experimental group treated with aromatic inhalation scored significantly lower for test anxiety (t=-2.330 p=.023), physical stress (t=-2.910 p=.005) and psychological stress (t=-3.285 p=.002) compared to the control group. However, there were no differences in serum cortisol levels (t=0.228 p=.820). Conclusion: Results indicate that Aromatic inhalation, using maychang, lavender and rosewood essential oils, contributes significantly to reducing anxiety and stress among nursing students, and can therefore be an effective intervention for anxiety and stress.

• 가족자원경영과 정책
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• 제19권3호
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• pp.41-62
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• 2015

The purpose of this study is to investigate the effects of work-family conflict and spousal support resources on parenting stress among working mothers with pre-school children. This study involved a total of 232 working mothers with children enrolled in child care centers in Seoul and Gyeonggi-do as conducting a survey. First, the higher the work-family conflict (inter-role conflict caused by the impact of work on family life), the higher the family-work conflict (inter-role conflict caused by the impact of family life on work). Moreover, the lower the level of spousal support resources (emotional spousal support resources, instrumental spousal resources), the higher the work-family conflict and family-work conflict. The level of parenting stress was higher in working mothers experiencing greater work-family conflict and family-work conflict both and lower levels of spousal support resources for parenting. Second, the number of children and the amount of work-family conflict and instrumental spousal support resources had a statistically significant impact on parenting stress. Thus, the higher the number of children, the greater the work-family conflict, and the lower the level of instrumental spousal support resources, the higher the level of parenting stress. The findings of this study highlight the relative effects of role conflicts between work and family and of spousal support resources on parenting stress in working mothers. Husbands' being involved in parenting, in particular, was identified as an important support function for healthy child-rearing by successfully combining career and family responsibilities.

• 한국터널지하공간학회 논문집
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• 제14권5호
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• pp.453-467
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• 2012

공간이 한정된 도심지에서 인구가 밀집되는 가운데 도심의 복합지하공간에 대한 개발은 날로 늘어나고 있다. 이러한 가운데 홍수피해의 90% 이상이 도심지 홍수피해라고 할 만큼 도심지의 수재해에 대한 대비가 필요한 실정이다. 이러한 요구에 따라 도심지 복합지하공간 하부에 지하저류공동 시설물을 시공하여 도심지 홍수피해 시 복합지하공간에 대한 안정성을 확보하고자 한다. 지하저류공동에서 저장된 빗물을 원활히 제어하기 위해서는 한 개의 공동보다 다수의 저류공동 시설로 설계하는 것이 유리하다. 다수의 저류공동으로 시공을 할 경우 공동과 공동 사이의 필라 구조물에 상부의 하중이 집중되기 때문에 필라 구조물에서 안정성 확보 방안이 필수적이다. 따라서 본 연구에서는 필라부의 안정성을 확보하기 위한 필라부 보강공법을 개발하였다. 필라부 보강공법은 철근과 PC강연선으로 구성된 보강재를 필라부에 삽입한 후 가압 그라우팅을 하고, 프리스트레스를 가하는 공법이다. 따라서 기존의 프리케스트 콘트리트 구조물로 필라부를 보강하는 것과 달리 원지반을 직접 보강하는 공법으로 원지반의 강도를 최대한 활용할 수 있다는 장점이 있다. 먼저, 가압 그라우팅을 하였을 경우 지반 보강효과뿐만 아니라 필라부에 가해지는 상부의 하중을 경감시킬 수 있는 효과가 있다. 또한 프리스트레스를 가하게 되면 필라부에 내압을 가하는 효과로 인하여 지반강도를 증가시키는 역할을 기대할 수 있다. 본 논문에서는 이러한 보강효과를 통해서 필라부 주변지반의 거동이 어떻게 변화할 것인지를 판단하고자 한다. 먼저, 수치해석을 통해서 각 시공단계별 필라부 지반의 응력 변화 양상을 판단하였다. 이를 통해서 가압 그라우팅과 프리스트레스에 의한 효과를 검증할 수 있었다.

• 대한의생명과학회지
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• 제19권1호
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• pp.55-60
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• 2013

This study was to know the effects of massage on the back region in order to reduce stress in middle age women. To investigate the effects of massage to the stress levels of middle aged women, we evaluated blood pressure (BP), heart rate variability (HRV), and ultrasonography before and after back massage. The blood pressure after massage was reduced when compared to that of pre-massage. The HRV spectrum analysis was used Frequency domain analysis such as Mean HRV, normalized low frequency (norm LF), norm high frequency (norm HF), and LF/HF ratio. Post-massage BP tended to be low, but not statistical significant. After Massage, the Mean HRV, norm LF, and LF/HF ratio were significantly reduced, while norm HF was significantly increased as compared with pre-massage. The muscle layer and fat layer were significantly diminished by massage. The study was suggested that massage may be an effective treatment for relief of stress.

• 소성∙가공
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• 제17권8호
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• pp.564-569
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• 2008

Strain hardening behavior during hydroforming has been experimentally investigated. The variation of flow stress was used as an index of strain hardening during respective processes and the flow stress was estimated from the correlationship between flow stress and effective strain. The local hardness after hydroformig was also predicted by effective strain. By using the inter-relationships between hardness-flow stress-effective strain at variable pre-strains, the strain hardening behavior during hydroforming has been successfully analyzed. The comparison of predicted hardness with measured hardness confirmed that the methodology used in this study was feasible and the strain hardening behavior can be quantitatively estimated.

• 소성∙가공
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• 제5권1호
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• pp.18-26
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• 1996

In order to investigate the effect of pre-cooling of ingot on void closure in hot plate forging the internal strain and stress distributions are examined quantitatively by using ABAQUS. Simula-tions are carried out on a large slab ingot having the same temperature and the temperature gradient induced by air-cooling. It is shown that pre-cooling produces little effect on the strain behavior but remarkable effect on the hydrostatic stress at the central zone of ingot. The main factors for crushing micro-voids are the effective strain and the time integral of hydrostatic stress in the region surrounding the voids. Based on regression analysis it was found that the distortion of void can be expressed as a polynomial function of the two factors.

• Structural Engineering and Mechanics
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• 제33권5호
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• pp.635-647
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• 2009

For the calculation of foundation settlement it is recommended to take into account so called influence zone inside the subsoil bellow the foundation structure. Influence zone inside the subsoil is the region where the load has a substantial influence on the deformation of the soil skeleton. The soil skeleton is pre-consolidated or over consolidated due to the original geostatic stress state. An excavation changes the original geostatic stress state and it creates the space for the load transferred from upper structure. The theory of elastic layer in Westergard manner is selected for the vertical stress calculation. The depth of influence zone is calculated from the equality of the original geostatic stress and the new geostatic stress due to excavation combined with the vertical stress from the upper structure. Two close formulas are presented for the influence zone calculation. Using ADINA code we carried out several numerical examples to verify the proposed analytical formulas and to enhance their use in civil engineering practice. Otherwise, the FEM code accuracy can be control.

• International Journal of Contents
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• 제5권4호
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• pp.44-50
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• 2009

The purpose of this research was to measure the effect of a gestalt group meditation therapy intervention program on occupational stress and anxiety in working women aged 30 to 49 in Korea. Scientific methods were employed to test a gestalt group meditation therapy intervention program as treatment for working women in 30-40s to reduce their level of occupational stress and anxiety. The study involved 18 volunteer subjects ages of 30 to 49 years, randomly divided into two groups: (1) gestalt group meditation therapy intervention program, and (2) no program. Both groups completed a pre-test and a post-test of occupational stress scale and trait anxiety inventory. The outcome data was analyzed as qual1litative information using the SPSSPC+ computer program. Mann-Whitney U test was used to analyze the result in order to verify the sameness between experienced group and controlled group of pre-test scores within the groups. Also U-test comparisons were used to analyze the treatment effects. The results of this investigation indicated that (1) occupational stress scores decrease after gestalt group meditation therapy intervention program on the treatment group, and (2) trait-anxiety scores decrease after gestalt group meditation therapy intervention program on the treatment group. In summary, the gestalt group meditation therapy intervention program for career women, aged 30 to 49, in Korea could reduce the subjects' occupational stress and anxiety.