• Title/Summary/Keyword: Complex stress

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Non-coding RNAs Associated with Biotic and Abiotic Stresses in Plants

  • Kang, Han-Chul;Yoon, Sang-Hong;Lee, Chang-Muk;Koo, Bon-Sung
    • Journal of Applied Biological Chemistry
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    • v.55 no.2
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    • pp.71-77
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    • 2012
  • Many of biochemical or physiological processes can be regulated by non-coding RNAs as well as coding RNAs in plants, animals and microbes. Recently, many small RNAs including microRNAs (miRNAs) and endogenous small interference RNAs (siRNAs) and long non-coding RNAs have been discovered from ubiquitous organisms including plants. Biotic and abiotic stresses are main causal agents of crop losses all over the world. Much efforts have been performed for understanding the complex mechanism of stress responses. Up to date, many of these researches have been related with the identification and investigation of stress-related proteins, showing limitation to resolve the complex mechanism. Recently, non-coding RNAs as well as coding genes have been gradually interested because of its potential roles in plant stress responses as well as other biophysical aspects. In this review, various potential roles of non-coding RNAs, especially miRNAs and siRNAs, are reviewed in relation with plant biotic and abiotic stresses.

A Design Sensibility and Music Matching System Using Bio Information (생체정보를 이용한 감성.매칭 시스템의 설계)

  • Kim, Tae-Yeun;Seo, Dae-Ung;Bae, Sang-Hyun
    • Journal of Integrative Natural Science
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    • v.1 no.2
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    • pp.122-126
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    • 2008
  • The stress is an unavoidable result and a complex phenomenon in modern society. too, Human activity changes under control of the stress. The stress is a reaction to adrenalin or other stress hormones. It provides the power for fighting and the energy for going away from dangers. Because of the stress, our bodies increase the pulse, the blood pressure and the breath for more blood and more oxygen. So, in this research, we are measuring those which was increased by the stress. Also we will examine the change of HRV and APG on music. After that, in order to reduce the stress, we will design matching system that is based on the sense for music by using Zigbee.

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Evaluation of Stress Intensity Factors and T-Stress Using a Conservation Integral (보존적분을 이용한 응력강도계수와 T-응력의 계산)

  • 범현규;엄윤용
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.18 no.1
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    • pp.121-126
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    • 1994
  • A mutual integral, which has the conservation property, is applied to the problem of a crack in an isotropic elastic material. The stress intensity factors $K_{I}, K_{II}, K_{III}$ and T-stress for the problem in an infinite medium are easily obtained by using the mutual integral without solving the boundary value problem. The auxiliary solutions necessary in the proposed method are taken from the known asymptotic solutions. This method is amenable to numerical evaluation of the stress intensity factors and T-stress if the crack in a finite medium is considered.

Stress Analysis of Composite Plate with an Elliptical Hole or a Crack Using Complex Potentials (복소퍼텐셜을 이용한 타원공 또는 균열을 가진 복합재 평판 응력해석)

  • Kwon, Jung-Ho;Hwang, Kyung-Jung
    • Composites Research
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    • v.20 no.5
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    • pp.56-63
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    • 2007
  • An approach using complex potentials is presented for analysis of composite plate with an elliptical hole or a rectilinear crack. Composite structure is susceptible to encounter impact damages, which lead to considerable decrease in its residual strength. Such impact damages could be modeled as an equivalent elliptical hole or notch-like crack. Even though finite element method is widely used to analyze stresses or fracture mechanics parameters around such damage, it is tedious to make successive FE-modeling for damage tolerance assessment under fatigue loadings. In this point of view, the solutions based on complex potentials are very simple and easy to use. The computed results are also compared and discussed with those from FEA.

Treatment of Complex PTSD by using Eye Movement Desensitization and Reprocessing - A Case Report - (복합적 외상후 스트레스 장애의 안구운동 민감소실 및 재처리 요법을 이용한 치료 - 증례보고 -)

  • Kim, Nam-Hee
    • Anxiety and mood
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    • v.2 no.2
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    • pp.142-146
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    • 2006
  • People who were exposed to chronic interpersonal traumas in their early life consistently demonstrate complex psychological disturbances and many of them meet the criteria for proposed diagnosis of complex posttraumatic stress disorder (complx PTSD). The author reports a case of the successful sequential integrative treatment mainly composed of eye movement desensitization and reprocessing (EMDR) in a complex PTSD patient. The patient did not respond to the previous treatment with psychotropic medications and supportive psychotherapy. Twelve sessions of EMDR and three sessions of supportive psychotherapy were done for the patient. Psychological assessments were performed before starting the treatment and a week after completing the treatment. After the treatment, the patient improved on all the psychological scales and behavioral measures. This case suggests that the sequential integrative treatment mainly composed of EMDR may be effective for complex PTSD patients.

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The Golgi complex: a hub of the secretory pathway

  • Park, Kunyou;Ju, Sungeun;Kim, Nari;Park, Seung-Yeol
    • BMB Reports
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    • v.54 no.5
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    • pp.246-252
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    • 2021
  • The Golgi complex plays a central role in protein secretion by regulating cargo sorting and trafficking. As these processes are of functional importance to cell polarity, motility, growth, and division, there is considerable interest in achieving a comprehensive understanding of Golgi complex biology. However, the unique stack structure of this organelle has been a major hurdle to our understanding of how proteins are secreted through the Golgi apparatus. Herein, we summarize available relevant research to gain an understanding of protein secretion via the Golgi complex. This includes the molecular mechanisms of intra-Golgi trafficking and cargo export in the trans-Golgi network. Moreover, we review recent insights on signaling pathways regulated by the Golgi complex and their physiological significance.

Analysis of Photoelastic Stress Field Around Inclined Crack Tip by Using Hybrid Technique (하이브리드 기법에 의한 경사균열 팁 주위의 광탄성 응력장 해석)

  • Chen, Lei;Seo, Jin;Lee, Byung-Hee;Kim, Myung-Soo;Baek, Tae-Hyun
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.34 no.9
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    • pp.1287-1292
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    • 2010
  • In this paper, a hybrid technique is presented. First, the isochromatic fringe data of a given set of points are calculated by the finite element method and are used as input data in complex variable formulations. Then the numerical model of the specimen with a central inclined crack is transformed from the physical plane to the complex plane by conformal mapping. The stress field is analyzed and the mixed-mode stress intensity factors are calculated for this complex plane. The stress intensity factors are calculated by the finite element method as well as by a theoretical method and compared with each other. In order to conveniently compare these values with each other, both actual and regenerated photoelastic fringe patterns are multiplied by a factor of two and sharpened by digital image processing.

Effectiveness of Cold Stress Thermography in the Diagnosis of Complex Regional Pain Syndrome Type 1 (복합부위통증증후군 1형 환자에서 한냉부하 적외선체열촬영의 유용성 평가)

  • Park, Eun Jung;Han, Kyung Ream;Chae, Yun Jeong;Jeong, Won Ho;Kim, Chan
    • The Korean Journal of Pain
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    • v.19 no.2
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    • pp.159-163
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    • 2006
  • Background: Despite the enormous amount of basic research on neuropathic pain, there is the lack of an objective diagnostic test for complex regional pain syndrome (CRPS). The aim of this study was to evaluate the usefulness of cold stress thermography in the diagnosis of CRPS. Methods: The study involved 12 patients with CRPS type 1, according to the IASP criteria, who were compared with 15 normal healthy volunteers. All subjects underwent thermographic examination under baseline conditions at $21^{\circ}C$. A cold stress test (CST; $10^{\circ}C$ water for 1 minute) was then applied to both hands below the wrists, immediate, and after 10 and 20 minutes. Results: The temperature asymmetry between the patients with CRPS and the volunteers showed significant discrimination at the baseline and after a 20 minute recovery period from the CST. Among the study subjects having temperature asymmetry of both hands of less than $1^{\circ}C$ (8 out of 12 CRPS patients and 14 out of 15 volunteer), 7 (87.5%) of the 8 CRPS patients and 3 (21%) of the 14 volunteers showed a temperature difference of more than $1^{\circ}C$ after the 20 minute recovery period. The actual temperature values during the four periods did not discriminate between the patients with CRPS and the volunteers. Conclusions: Thermography, under the CST, could be a more objective test for the diagnosis of CRPS. A temperature asymmetry greater than $1^{\circ}C$ during the 20 minute recovery period following CST provides strong diagnostic information about CRPS, with both high sensitivity and specificity.