• 정신신체의학
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• 제10권1호
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• pp.18-26
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• 2002

연구목적: 본 연구의 목적은 만성요통 환자에서 스트레스지각 및 통증지각과 대응전략 간의 관계를 알아보고자 하는데 있다. 본 연구에는 만성요통 환자 80명과 정상대조군 100명이 참여하였다. 방법: 스트레스인자 및 스트레스반응에 대한 지각은 각각 스트레스인자 지각척도 (Global Assessment of Recent Stress Scale) 및 스트레스반응 척도(Stress Response Inventory)를, 대응전략 및 통증지각은 각각 대응척도(The Way of Coping-revised) 및 통증지각척도(Pain Discomfort Scale)를 이용하여 평가하였다. 결과: 만성요통환자들이 정상대조군보다 일 및 직장, 대인관계, 대인관계의 변화, 질병 및 상해에 관련된 스트레스인자 지각점수, 전체 스트레스인자지각 정수가 각각 유의하게 더 높았다. 스트레스반응점수에서는 피로점수가 정상대조군보다 환자군에서 유의하게 더 높았으나, 통증지각에서는 양군 간에 유의한 차이를 보이지 않았다. 대응전략에서는 환자군이 정상대조군에 비해 계획적 문제해결 및 긍정적 재평가를 더 많이 사용하였다. 환자군에서 통증지각은 전체 스트레스반응 점수, 질병 및 상해에 관련한 스트레스인자지각 점수와 각각 유의한 양상관성을 보였다. 도피 회피 점수는 연령과 유의한 음상관성을, 거리감두기 및 도피-회피 점수는 유의한 양상관성을 보였다. 한편 책임수용은 여자가 남자보다 더 유의하게 많이 사용하였다. 그러나 대응전략과 스트레스인자지각 및 스트레스반응 통증지각 간에는 각각 유의한 상관성을 보이지 않았다. 결론: 이상의 결과들은 만성요통환자들이 정상인에 비해 스트레스인자에 대한 지각이 더 높으나, 더 적극적인 대응을 하고 있음을 시사한다. 또한 환자군에서 사용하는 대응전략은 스트레스인자지각, 스트레스반응, 통증지각과 연관성을 보이지 않는 반면 사회인구학적 특정들과 연광성이 높음을 시사한다.

• 한국기계가공학회지
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• 제17권2호
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• pp.137-144
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• 2018

This study describes the 3D design and analysis of a composite insulation boom of an aerial work platform for electric work. Structural analysis of the composite insulation boom was performed using ANSYS and the total deformation, equivalent stress, and normal elasticity were investigated at 150 mm, 500 mm, 1,000 mm, and 1,500 mm using a mounted strain gauge. The results of the analysis and test were similar in a linearly increasing slope and the difference in the strain value was about 10%. This difference depends on the compressive force in the manufacturing process.

• Korea-Australia Rheology Journal
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• 제13권3호
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• pp.141-148
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• 2001

In this research, experimental studies leave been performed on the hydrodynamic interaction between a spherical particle and a plane wall by measuring the force between the particle and wall. To approach the system as a resistance problem, a servo-driving system was set-up by assembling a microstepping motor, a ball screw and a linear motion guide for the particle motion. Glycerin and dilute solution of polyacrylamide in glycerin were used as Newtonian and non-Newtonian fluids, respectively. The polymer solution behaves like a Boger fluid when the concentration is 1,000 ppm or less. The experimental results were compared with the asymptotic solution of Stokes equation. The result shows that fluid inertia plays all important role in the particle-wall interaction in Newtonian fluid. This implies that the motion of two particles in suspension is not reversible even in Newtonian fluid. In non-Newtonian fluid, normal stress difference and viscoelasticity play important roles as expected. In the dilute solution weak shear thinning and the migration of polymer molecules in the inhomogeneous flow field also affect the physic of the problem.

• 대한정형도수물리치료학회지
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• 제24권2호
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• pp.43-49
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• 2018

Background: In this study, the importance of constipation and back pain was assessed by regression analysis of the effects of stress, dietary habits, and water intake on constipation in women in their twenties and the influence of constipation and body mass index (BMI) To provide basic data. Methods: This study selected 109 having constipation of 120 students attending G University in Gwangju and eating habits, water intake level, stress and BMI. Trigger point at the tip of erector spina was palated with tenderness set in order to examine whether muscle tenderness and actual low back muscle tenderness level were same and left and right parts were measured three times and average of Max values was used. We examined the effect of constipation on low back pain and examined constipation and BMI to determine whether they affected low back pain. Results: There was no significant difference in eating habit although there was a significant difference in the effect of stress and water intake on constipation. Constipation had significant difference in back pain. However, there was no significant difference in BMI, normal weight, overweight, and obesity except for low body weight. Conclusions: This study found that constipation was associated with stress levels, water intake, and back pain. In conclusion, this study suggests basic data to prevent and treat constipation-related back pain, and recommends plenty of water intake, proper exercise and stress management to prevent constipation.

• 한국음향학회지
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• 제32권5호
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• pp.430-437
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• 2013

본 연구는 정상 청력인에서 시간 변화 (i.e., 압축과 확장)와 선택적 단어 강조법이 문장인지도에 영향을 미칠수 있는지를 평가하였다. 정상 청력을 지닌 성인 20명이 연구에 참여 하였다. 자극음으로 한국표준 일반용 문장표(KS-SL-A)가 사용되었고, 문법적으로는 적절하지만 의미론적으로는 변칙적이고 무의미하게 재구성한 후, 여성 화자에 의해 녹음하였다. 시간 변화는 7단계 (e.g., ${\pm}60%$, ${\pm}40%$, ${\pm}20%$, 0 %)의 압축 및 확장으로 조절하였다. 이 때 선택적 단어 강조법 (i.e., 문장 내에서 특정 단어를 강조)의 효과를 보기 위하여 모든 대상자들에게 2주 간격으로 두 번 검사를 시행하였다. 연구 결과 1) 시간 변화에 따른 문장인지도 정반응률은 60 % 압축 조건에서만 통계적으로 유의하게 낮았다. 2) 선택적 단어의 강조 유무에 따른 문장인지도의 정반응률은 유의한 차이가 없었다. 그러나 6 ~ 7개의 어절로 이루어진 장문장의 자극음을 사용할 경우, 40 % 압축 조건에서 단어가 +6 dB 강조되었을 때, 유의하게 정반응률이 향상되었다. 3) 성별에 따른 문장인지도의 정반응률은 유의한 차이가 없었다. 본 연구의 결과는 조금 빠른 시간 압축과 선택적 단어 강조법을 함께 사용했을 때가 시간 확장만 사용하였을 때보다 문장을 이해하는데 더 효과적임을 시사하고 있다. 그러나 후속 연구에 의한 표준화 자료가 동반되어야 하겠다.

• 한국작물학회지
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• 제47권2호
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• pp.116-122
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• 2002

Dehydrins (LEA Dll proteins) are one of the typical families of plant proteins that accumulate in response to dehydration, cold stress, abscisic acid, or during seed maturation. A 1.3-kb cDNA was cloned from a cDNA expression library of 5-day-old germinating maize scutellums under drought stress. The deduced protein sequence indicated a dehydrin gene encoding SK$_3$ LEA protein typically expressed during cold acclimation, but not by drought stress in barley and wheat. Thus, it was named maize DEHYDRIN2 (ZmDhn2). It accumulates rapidly and highly in drought-stressed scutellum and leaf tissues at any stage, but not under cold stress. ZmDhn2 gene was transformed into Arabidopsis thaliana for functional analysis under drought condition. From electrolyte leakage test, no significant difference showed between wild type and transformants under normal growth condition, but the leakage level of electrolyte in wild type plants was about 3 times as high as that in the transformed plants under drought stress. It suggests that ZmDHN2 playa role in increasing drought tolerance.

• Computers and Concrete
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• 제15권2호
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• pp.199-213
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• 2015

The residual fracture toughness of post-fire normal-strength concrete subjected up to $600^{\circ}C$ is considered by the wedge splitting test. The initial fracture toughness $K_I^{ini}$ and the critical fracture toughness $K_I^{un}$ could be calculated experimentally. Their difference is donated as the cohesive fracture toughness $K_I^c$ which is caused by the distribution of cohesive stress on the fracture process zone. A comparative study on determining the residual fracture toughness associated with three bi-linear functions of the cohesive stress distribution, i.e. Peterson's softening curve, CEB-FIP Model 1990 softening curve and Xu's softening curve, using an analytical method is presented. It shows that different softening curves have no significant influence on the fracture toughness. Meanwhile, comparisons between the experimental and the analytical calculated critical fracture toughness values further prove the validation of the double-K fracture model to the post-fire concrete specimens.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• 제22권4호
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• pp.228-235
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• 2011

Objectives : This study was conducted to compare the object relations and parenting behavior of the mothers of children with attention-deficit hyperactivity disorder (ADHD) with that of the mothers with normal children. Methods : In this study, we studied 64 mothers of children who were diagnosed with ADHD and 90 mothers of normal children. The mothers completed the Bell Object Relations Inventory (BORI), the Parenting Behavior Inventory (PBI), the Parenting Stress Index (PSI) and the Parenting Sense of Competence (PSOC) scale. Results : As compared with the mothers of normal children, the mothers of children with ADHD showed significantly different results for the parenting stress and parenting efficacy. For parenting behavior, the mothers of children with ADHD perceived their mothering as being more neglectful. On the other hand, the mothers of the normal control group perceived their mothering as being more affectionate and the fathers as being more reasonable and monitoring. Conclusion : This study suggests there is a significant difference of object relation between the mothers of children with ADHD and the mothers with normal children. The object relation pathology of the mothers of children with ADHD might contribute to impaired parenting behavior. The result of the present study indicate that inadequate grandparental rearing behavior affects the insecure object relation of their child (the mother), and a mother's insecure object relation affects their parental stress and parenting efficacy.

• 대한한방소아과학회지
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• 제21권2호
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• pp.1-12
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• 2007

Objectives : Allergic children have known to have multiple behavior problems. Among them, attentional ability disorder is one of the most common problems. This study is to examine relationship between learning ability and allergic rhinitis by analyzing EEG status of children. Methods : We analyzed cognitive functions of two different children groups; 21 children with allergic rhinitis and 19 normal children with CANS 3000(Central & Autonomic Nervous System, LAXTHA Inc., Korea), cognitive functions assessment program by EEG. Results : 1. According to mean active EEG rhythm of Theta, Alpha, SMR, M-beta, there were no significant difference between allergic rhinitis and the normal group. 2. According to mean active EEG rhythm of right H-beta, Gamma wave allergic rhinitis group's value was significantly higher than that of the normal group. 3. According to mean cognitive strength, response, concentration, left / right brain activity and learning ability score, there were no significant difference between allergic rhinitis and the normal group. 4. According to mean workload score, allergic rhinitis group's value was significantly higher than that of the normal group. Conclusions : It is likely that allergic rhinitis group, which showed relatively high frequency EEG rhythm, is more fragile to stress and less active on mental processing. Along side with physical examination, psychological assessment should also be conjugated on treating children with allergic rhinitis.

• 대한예방한의학회지
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• 제7권1호
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• pp.1-15
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• 2003

This study tried to evaluate the difference of stress degree by Sasang constitution and lifestyle for workplace labors, and suggested the preventive oriental medicine approaches in occupational health area. 479 data for research were collected through the process of oriental health examination with questionnaire in workplace, and collected data were analyzed with frequency, crosstab, and Two-Way ANOVA. The results were as follows: 1) All subjects, total 479 were men, and constitutional distributions were 39.2% of Taeumin, 32.4% of Soumin, and 28.4% of Soyangin. The distributions of stress score were 13.2% of normal group, 13.4% of high risk group, and 73.5% of potential risk group. 2) There were no statistically significant differences for stress by constitution(p=0.085). By the results of optimal scaling and homogeneity analysis, Soyangin was close to potential risk group compared to other constitution, and Soumin and Taeumin were close to high risk and normal group, respectively. 3) For the difference of stress score by Sasang constitution and lifestyle, Soumin who exercised nearly everyday had the highest stress score with interaction in Factor 4 area(p<0.05), and there was no interaction in other area. 4) For the difference of PWI score by lifestyle, there were statistically significant differences for drinking(p<0.01), smoking(p<0.01), and obesity index(p<0.01)