• Title/Summary/Keyword: stress pattern

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Measurement of Stress Intensity Factor of Isotropic Material Using SPATE (SPATE에 의한 등방성체의 응력확대계수 측정)

  • Hwang, Jae-Seok;Seo, Jae-Guk;Lee, Hyo-Jae;Nam, Jeong-Hwan;Rowlangs, R.E.;Choe, Yeong-Cheol
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.21 no.3
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    • pp.393-404
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    • 1997
  • SPATE(Stress Pattern Analysis by Thermal Emission) can be effectively used to analyze the stress distributions of isotropic structure under the repeated load by non-contact. In this research, the measuring method and the measuring concept of stress intensity factor of isotropic material by SPATE are suggested. The validity of the method and the concept was certified through SPATE experiment.

Measurement of Stress Intensity Factor of Orthotropic Material Using SPATE (SPATE에 의한 직교이방성체의 응력확대계수 측정)

  • Hwang, Jae-Seok;Suh, Jae-Guk;Lee, Hyo-Jae;Nam, Jeong-Hwan;Rpwlands, R.E.
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.20 no.10
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    • pp.3224-3233
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    • 1996
  • SPATE(Stress Pattern Analysis by Thermal Emission) can be effectively used to analyze the stress distribution of the orthotropic structure under the repeated load by non-contact. In this research, the measuring conception and method of stress intensity factor of orthotropic material using SPATE are suggested. The relationships between the maximum values of SPATE signal and $1/\sqrt{X'}$ (or $1/\sqrt{y'}$) are theoretically established in the vicinity of crack tip of the orthotropic material. It is certified through SPATE experiment that their linear quality is very excellent.

A Study on Farm Women's Stress in Productive Activity (농초여성의 생산활동 스트레스에 관한연구)

  • 양순미
    • Journal of Families and Better Life
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    • v.14 no.2
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    • pp.127-138
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    • 1996
  • The purpose of this study is to show farm women's stress under productive activity role multiple overload through family characteristic (pattern and number) and characteristic(type working time and involvement proportion) of productive activity. The outline of the study is as follow; 1. Stress by pattern and number of a family is highest in a four generation family and increases according as the number of the family increases. 2. The characteristic of productive activity : 1) Stress based on type of productive activity is highest in Type III of the most multiple overload roles. 2) in light of stress based working time area of household task activity is in inverse proportion to working time but area of farming and wage earning activity are approximately in direct proportion to it. The two-way ANOVA analysis show that stress in Type I of area of household task increases but in Type IV it decreases as working time increases 3) In stress based on involvement proportion to it. The wo-way ANOVA analysis show that stress in Type I of area of household task increases but in Type IV it decreases as working time increases. 3) In stress based on involvement proportion in three as working time increases 3). In stress based on involvement proportion in three activity areas the more the involvement proportion the less of the stress : an inverse ratio.

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Stress and Coping in Parents of Cerebral Palsy Children (뇌성마비아 부모의 스트레스와 대처방안에 대한 연구)

  • Song Young-Hwa
    • The Journal of Korean Physical Therapy
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    • v.6 no.1
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    • pp.49-60
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    • 1994
  • Stress is experienced when a person tries to maintain stability in the face of life change but is not able to meet the adaptive demands of change. This can be especially true for the parents who has a cerebral palsy childs who needs long term rare, where parents, are the primary source of care and responsibility. Successful coping leads to maintenance of the parents role and this has an effect on the health status of the child. This descriptive study was attempted to identify stress factors, levels and helpful coping patterns for parents who must take care of cerebral palsy children. Data were collected from 43 subjects who were parents of children diagnosed with cerebral palsy The informations gathered from March 25, 1994 to April 14, 1994 by means of structured questionnaires were analyzed. Two instruments were used to collect the data 1) Lee's stress questionnaire consisted of 33 stress factors and measured by four point Likert scale. 2) Modified Chronic Health Inventory for parents: The modified CHIP included 43 items of coping methods with four point Likert scale. The results of this study were as follows: 1) Stress items could have a maximum score of three points, for a total possible score of 132 points. The mean score for the total was 92.02 points. The item mean score was 2.85 points showing that the parents were experiencing moderate to much stress. 2) The items with the highest stress items were 16 items. The stress items with the lowest mean scores were 10 items. 3) Of the stress categories: The highest stress category was related to changes in the illness status of the child and difficulty in taking rare of the child. The second stressful category was related to the prognosis of the child's condition. The least stress was noticed to social-personal relationships and the responsibility of the care givers. 4) Items measuring coping in the parents had a maximum score of three points each with a total possible roping score of 172 points. The mean score for the total was 103,9 paints. The item mean score was 2.42 points indicating that there were responses of little helpful to moderately helpful on each coping pattern. 5) The most helpful coping items were 7 items. The least helpful coping items were 2 items. 6) Effectiveness of the coping for each patterns was examined : Understanding the illness condition from communication with parents of children with the same condition and consultation with the medical team was the most helpful coping pattern. Family's coorperation and integration and optimism were a moderately helpful coping pattern. Social support psychological stability and self esteem were the least helpful toping pattern. In conclusion, the highest stress for parents of children with cerebropalsy was found to be very stressful changes in the illness of the child and to taking care of a child who is suffering. The parents were helped by the coping methods using understanding of the illness condition through consultation with the medical learn and communication with parents in the same situation. Based on the knowledge, care could develop intervention strategies appropriate for them, help them to develop their effective coping patterns, and give support them in the process of coping with their stress.

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The Phonology and Phonetics of the Stress Patterns of English Compounds and Noun Phrases

  • Lee, Joo-Kyeong
    • Speech Sciences
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    • v.14 no.1
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    • pp.21-35
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    • 2007
  • This paper attempts to investigate phonetic substances of the stress patterns of English compounds and noun phrases, showing that the theoretically derived stress structures are not consistent with the accentual patterns in real utterances. Even though it has been long claimed that compounds have the stress pattern [1 3] and that noun phrases, [2 1] as in Chomsky & Halle (1968), their difference has not been yet explored empirically or phonetically. I present a phonetic experiment conducted to see if there is any difference along the tonal contours, mostly focusing on their pitch accent distribution. 36 different compounds and 36 different noun phrases included in carrier sentences were examined, and they were varied in position within a sentence. Results showed that various accentual patterns were produced, and among them, [H* X] predominantly occurs in all three positions in both compounds and noun phrases, whereas the patterns [X H*] and [X X] appear relatively more frequently in final position than in initial and medial position. Furthermore, the pattern [Ac + No], in which the preceding element is pitch-accented with no accent on the following one, is the major stress pattern in both compounds and noun phrases and in all three sentence positions. This suggests that there seems to be no difference in accentual patterns between compounds and noun phrases, which is not consistent with the hypothesis. The results are interpreted as saying that the preceding element alone tends to be prominent with no accent following it both in compounds and noun phrases, and that therefore, theoretically speculated phonological claims are not always phonetically supported.

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A Study on Menstrual Pattern and Dysmenorrhea Related Factors of First-year Women College Students (일개 대학 신입생의 월경양상과 월경통 관련 인자에 대한 연구)

  • Cha, Ji-Hea;Kim, Yoon-Sang;Lee, Eun-Mee
    • The Journal of Korean Obstetrics and Gynecology
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    • v.23 no.4
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    • pp.117-129
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    • 2010
  • Purpose: The purpose of this study is to recognize menstrual pattern and dysmenorrhea related factor of first-year women student at college. Methods: From March 22nd to April 2nd, 2010 we researched 382 first-year women students at 00college, aged 19(born after March 1991 to February 1992) by questionnaires to investigate their menstruation and stress. Results: 1. There was statistical correlation between dysmenorrhea and weight and BMI. 2. There was statistical correlation between dysmenorrhea and menstrual amount. 3. There was statistical correlation between dysmenorrhea and menstrual blood clot. 4. There was statistical correlation between dysmenorrhea and stress. Conclusion: This study showed the menstrual pattern and relation between dysmenorrhea and stress. Dysmenorrhea is related to weight, BMI, menstrual amount, menstrual blood clot and especially stress is closely related to dysmenorrhea.

Anisotropy Control of Highly Magnetostrictive Films by Bias Stress (바이어스 응력에 의한 고자왜 아몰퍼스 박막의 자기이방성 제어)

  • Shin, Kwang-Ho;Kim, Young-Hak;Park, Kyung-Il;Sa-Gong, Geon
    • Journal of the Korean Magnetics Society
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    • v.13 no.5
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    • pp.193-197
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    • 2003
  • To materialize the magnetoelastic devices, such as a highly functional sensor and a signal processing device, using the Fe base amorphous film which has both excellent soft magnetic and magnetostrictive properties, in this study, a new method to control the magnetic anisotropy of a highly magnetostrictive film using bias stress has been proposed and tested. The film pattern, which was stressed by its substrate bending, was subjected to annealing for relieving its stress. Successively, the compressive stress occurred by flattening the substrate was formed in the pattern. With the introduction of the residual compressive stress, the magnetization of the film pattern was aligned in the transverse direction through magnetoelasic coupling. The magnetic domain structure and magnetization curve of the film pattern of which magnetic anisotropy was controlled by the proposed method were presented to verify the availability of the method.

A Study on Correlation between Stress and Menstruation among Low-income Women (저소득층 여성의 스트레스와 월경의 실태분석 및 상관관계 연구)

  • Kim, Hyun-Jung;Kim, Yoon-Sang;Lim, Eun-Mee
    • The Journal of Korean Obstetrics and Gynecology
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    • v.22 no.4
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    • pp.135-148
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    • 2009
  • Purpose: The purpose of this study is to recognize correlation between stress and menstrual pattern among low-income women. Methods: From 5th October to 24th October 2009 we researched 14 low-income mothers by questionnaires to investigate their stress and menstrual patterns. Results: The mean level of their stress was $6.71{\pm}2.92$. The less the income was, the higher the stress was. Among the women, the stress of those who do not had husbands was also high. Most of the women's menarche came late and their menstrual cycle was long. The menstrual color was a little dark and they had blood clots and pain during menstruation. Their mental states also often changed over the period and they had pattern of blood stasis. The study observed that the higher the stress was, the worse the menstrual pain was. Conclusion: Low-income women are under stress by their socioeconomic status and their menstrual patterns often change. Stress has correlation with menstruation.

Development of a Fitted Bodice Pattern Using a 3D Replica of Women's Upper Body (3D 레플리카를 이용한 여성용 밀착 상의의 패턴 전개 방법)

  • Lee, Hee-Ran;Hong, Kyung-Hi
    • Journal of the Korean Society of Clothing and Textiles
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    • v.29 no.7 s.144
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    • pp.1008-1017
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    • 2005
  • When we develop 2D pattern from replica of human body with small pieces, it is inevitable to have some replica pieces overlapped or departed. In this study, the optimized method of 2D pattern development from the 3D replica pieces was investigated using dress-form. Among six arrangement methods, anchoring two vertexes of a replica to neighboring vertexes of a next replica induces the optimized 2D pattern by evenly distributing stress across the 3D replica pieces. Anchoring neighboring vertexes resulted in automatic widening k overlapping (W & O) the interspaces among replicas of dress-form, thereby stress was distributed more evenly than any other method. W&O arrangement method was verified to be the best by examining the 3D space distribution images between body surface and twelve experimental garments.

A Study on Cutting Pattern Generation of Membrane Structures by Using Geometric Line (막 구조물의 측지선을 이용한 재단도 생성에 관한 연구)

  • Ahn, Sang-Gil;Shon, Su-Deok;Kim, Seung-Deog
    • Proceeding of KASS Symposium
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    • 2005.05a
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    • pp.125-132
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    • 2005
  • Membrane structures, a kind of lightweight soft structural system, are used for spatial structures. The material property of the membrane has strong axial stiffness, but little bending stiffness. The design procedure of membrane structures are needed to do shape finding, stress-deformation analysis and cutting pattern generation. In shape finding, membrane structures are unstable structures initially. These soft structures need to be introduced initial stresses because of its initial unstable state, and it happens large deformation phenomenon. And also there are highly varied in their size, curvature and material stiffness. So, the approximation inherent in cutting pattern generation methods is quite different. Therefore, in this study, to find the structural shape after large deformation caused by Initial stress, we need the shape analysis considering geometric nonlinear ten And the geodesic line on surface of initial equilibrium shape and the cutting pattern generation using the geodesic line is introduced.

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