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정현경 ( Hyeon Kyeong Jeong ),이동근 ( Dong-geun Lee ) 한국열처리공학회 2021 熱處理工學會誌 Vol.34 No.1
Exhaust manifold is a very important component that is directly connected to air environment pollution and that requires strict mechanical properties such as high temperature fatigue and oxidation. Among stainless steels, the ferritic stainless steel with body-centered cubic structure shows excellent resistance of stress-corrosion cracking, ferromagnetic at room temperature, very excellent cold workability and may not be enhanced by heat treatment. The microstructural characteristics of four cast ferritic stainless steels which are high heat-resistant materials, were analyzed. By comparing and evaluating the mechanical properties at room temperature and high temperature in a range of 400℃~800℃, a database was established to control and predict the required properties and the mechanical properties of the final product. The precipitates of cast ferritic stainless steels were analyzed and the high-temperature deformation characteristics were evaluated by comparative analysis of hardness and tensile characteristics of four steels at room temperature and from 400℃ to 800℃. (Received January 13, 2021; Revised January 15, 2021; Accepted January 19, 2021)
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젊은 성인 남성 우울증 환자에서 성인 ADHD 경향성이 심리학적 특징에 미치는 영향
정현경(Hyeon Kyeong Jeong),김양태(Yang Tae Kim) 대한생물치료정신의학회 2019 생물치료정신의학 Vol.25 No.1
Objectives:This study investigated psychological factors in patients with adult ADHD tendency and the relationship of adult ADHD tendency with depression and anxiety Methods:Ninety patients with depression(38 with adult ADHD and 52 with non-adult ADHD) were recruited in this study. All patients were subjected to the following tests : Korean Wechsler Adult Intelligence Scale-IV(K-WAIS-IV), Adult Attention-Deficit/Hyperactivity Disorder Self-Report Scale(ASRS-v1.1), Lee Ji-Yeon’s adult ADHD scale, Beck’s Depression Inventory II(BDI-II), Beck’s Anxiety Inventory(BAI), and Temperament Character Inventory-Revised Short version(TCI-RS). Results:The adult ADHD group had higher scores for BDI-II and BAI, novelty-seeking, harm-avoidance, and selftranscendence than the non-adult ADHD group. Conversely, the adult ADHD group showed lower scores for self-directedness and cooperativeness than the non-adult ADHD group. Depression scores were positively correlated with ASRS(r=0.524, p=0.000), Lee Ji-Yeon’s adult ADHD scale(r=0.598, p=0.000), anxiety scores(r=0.650, p=0.000), novelty-seeking(r=0.411, p=0.000), harm-avoidance(r=0.517, p=0.000), and self-transcendence(r=0.234, p=0.026). However, they were negatively correlated with persistence(r=-0.231, p=0.029), and self-directedness(r=-0.594, p=0.000). Higher Lee Ji-Yeon’s adult ADHD scale scores and lower self-directedness scores among TCI, resulted in higher depression scores. In addition, anxiety scores increased in parallel with the the Lee Ji-Yeon’s adult ADHD scale and harmavoidance TCI scores. Conclusion:In this study, we found a difference in the severity of depression and anxiety between the adult and non-adult ADHD groups. In addition, it was confirmed that the difference in temperament and character between the two groups was related to adult ADHD tendency and severity of depression and anxiety.
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ScienceON
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