직무요구가 직무스트레스에 미치는 영향: 직무통제와 절차공정성의 조절효과

임광모,탁진국 한국산업및조직심리학회 2016 한국심리학회지 산업 및 조직 Vol.29 No.2

본 연구는 직무스트레스를 예측하는 변인들을 파악하고, 그 변인들 간의 관계성을 밝히는 데 목적이 있다. 구체적으로 첫째, 직무요구를 양적요구와 질적요구로 구분하여 직무스트레스에 미치는 영향의 크기를 비교하였다. 둘째, 양적요구와 직무스트레스와의 관계, 질적요구와 직무스트레스의 관계에서 직무통제의 조절효과를 검증하였다. 셋째, 양적요구와 직무스트레스와의 관계, 질적요구와 직무스트레스의 관계에서 절차공정성의 조절효과를 검증하였다. 본 연구는 국내 다양한 기업, 다양한 직종에 종사하고 있는 직장인 454명을 대상으로 설문조사를 실시하여 자료를 수집하였으며, 최종분석에는 437명의 설문을 사용하였다. 분석결과, 양적요구와 질적요구 모두 직무스트레스에 정적으로 유의한 영향을 미쳤으며, 질적요구가 양적요구보다 직무스트레스에 미치는 영향이 더 큰 것으로 나타났다. 조절효과를 검증한 결과, 직무통제가 커질수록 양적요구와 직무스트레스 간의 정적인 관계는 완화되었으나, 절차공정성이 커질수록 양적요구와 직무스트레스 간의 정적인 관계는 강화되는 것으로 나왔다. 마지막으로 연구결과를 토대로 본 연구의 학문적 의의와 실무적 시사점, 그리고 연구의 제한점 및 향후 연구과제에 대하여 논하였다.

Numerical Assessment of Reinforcing Details in Beam-Column Joints on Blast Resistance

임광모,신현오,김동주,윤영수,이주하 한국콘크리트학회 2016 International Journal of Concrete Structures and M Vol.10 No.3

This numerical study investigated the effects of different reinforcing details in beam-column joints on the blast resistance of the joints. Due to increasing manmade and/or natural high rate accidents such as impacts and blasts, the resistance of critical civil and military infrastructure or buildings should be sufficiently obtained under those high rate catastrophic loads. The beam-column joint in buildings is one of critical parts influencing on the resistance of those buildings under extreme events such as earthquakes, impacts and blasts. Thus, the details of reinforcements in the joints should be well designed for enhancing the resistance of the joints under the events. Parameters numerically investigated in this study include diagonal, flexural, and shear reinforcing steel bars. The failure mechanism of the joints could be controlled by the level of tensile stress of reinforcing steel bars. Among various reinforcing details in the joints, diagonal reinforcement in the joints was found to be most effective for enhancing the resistance under blast loads. In addition, shear reinforcements also produced favourable effects on the blast resistance of beamcolumn joints.

보-기둥 접합부의 방폭성능에 관한 해석적 연구

임광모,윤영수,이주하 한국방재학회 2015 한국방재학회논문집 Vol.15 No.4

As the increase of explosive accidents and terrorism, demands of blast-resistant capacity in structures would be increased to prevent those situation. Therefore, various studies on blast-resistant structures should be performed. In this study, behavior of beam-column connections is investigated. Base specimen was designed according to the design criterion of beam-column connections. To determine the effects of reinforcement details, flexure, shear and diagonal bar were considered as variables. LS-DYNA, nonlinear finite element program, is selected to the numerical analysis of specimens. The analysis results included failure shape of specimens, deflection, support rotation and stress of reinforcements. In conclusion, specimen which was reinforced with additional flexure bars did not show significant differences as contrasted with base specimen. The diagonal reinforcements are more effective to resist the blast loads than additional flexure reinforcements because safety of connection was enhanced due to the transfer of plastic hinge region in case of reinforcing diagonal bars. In the specimen which is reinforced with additional shear bars, outstanding behavior was observed. In the structures subjected to blast loads, therefore, it is should be considered to not only flexural performance but also shear forces. 폭발사고나 테러 등이 증가함에 따라 구조물 방폭성능의 요구가 증가되고 있다. 국내에서도 폭발사고 등에 대비하기 위한 방폭구조물의 수요가 증가할 것이며, 이를 위해서는 다양한 측면의 관련 연구가 수행되어야 할 것이다. 본 연구에서는 철근상세가 보-기둥 접합부의 방폭성능에 미치는 영향에 대해 분석하였다. 표준 시험체는 보-기둥 설계매뉴얼을 바탕으로 정하중에 대해 설계되었으며 이 외에철근상세에 따른 영향을 분석하기 위해 휨, 전단, Diagonal철근 등이 보강된 시험체와 비교하였다. 접합부의 방폭성능을 평가하기 위해 유한요소해석 프로그램인 LS-DYNA에 의한 해석적 연구가 수행되었다. 해석결과는 시험체의 파괴형상, 변형, 지점회전각 그리고철근의 응력을 포함하고 있다. 추가적인 휨철근이 보강된 시험체의 방폭성능을 표준 시험체와 비교하여 큰 차이를 보이지 않았으나, Diagonal철근이 보강된 시험체는 보 영역에서 발생하는 소성힌지영역을 이동시켜 접합부의 안전성을 확보하는 등 방폭성능을 향상시켰다. 따라서 동일한 철근비에서 휨철근보다 Diagonal철근이 폭발하중에 더 효율적으로 저항하는 것을 확인하였다. 이에 더하여 전단철근이 배근된 시험체는 우수한 방폭성능을 보였으며, 이를 통해 폭발하중을 받는 콘크리트 구조에서 휨 성능과 함께 전단성능 역시중요한 고려사항임을 확인할 수 있었다.

비상용 고분자 계면에서 상용화제의 역할에 관한 이론적 연구

임광모,차국헌 ( Kwang Mo Lim,Kook Heon Char ) 한국화학공학회 1996 화학공학의이론과응용 Vol.2 No.2

滋陰健脾湯加枳殼·天麻가 腦細胞 및 腦血流力學 變動에 미치는 영향

임광모,정현우 대한동의생리학회,대한동의병리학회 2003 동의생리병리학회지 Vol.17 No.1

Jaeumgenby-tang(JGT) have been used in oriental medicine for many centuries as a therapeutic agent of vertigo caused by deficiency of qi(氣) and blood(血). Effect of Aurantii Fructus(AF) take off the phlegm by promoting the circulation of qi, Gastrodae Rhizoma(GR) has effects treating for headache, vertigo by calming the liver and suppressing hyperactivity of the liver-yang(陽). And, I designed to investigate whether injection of JGT adding AF · GR extract(JGTAG) affects cytotoxicity in vitro, cerebral hemodynamics [regional cerebral blood flow(rCBF), pial arterial diameter(PAD), mean arterial blood pressure(MABP)] in normal and cerebral ischemia rats by MCA occlusion method. The changes of rCBF and MABP were determinated by laser-doppler flowmetry(LDF), and the change of PAD was determinated by video microscope and width analyzer. The results were as follows in normal rats ; JGTAG was not cytotoxicity in brain cells. And JGTAG was significantly increased rCBF, PAD and MABP. This results suggest that JGTAG increased significantly rCBF by dilating PAD. And the results were as follows in cerebral ischemic rats ; The changes of rCBF and PAD were increased stably by treatment with JGTAG(10mg/kg, i.v.) during the period of cerebral reperfusion, and pretreatment with propranolol and indomethacin were increased JGTAG induced increase of rCBF and PAD during the period of cerebral reperfusion. We suggest that JGTAG has an anti-ischemic effect through the improvement of cerebral hemodynamics.

Theoretical Studies on the Conformation of End-functional Polymers Adsorbed at Interface

임광모,홍준식,차국헌 한국고분자학회 1997 한국고분자학회 학술대회 연구논문 초록집 Vol.1997 No.4

滋陰健脾湯加枳殼·天麻가 腦血流力學 變動에 미치는 작용기전

임광모,박철훈,정현우 대한동의생리학회,대한동의병리학회 2003 동의생리병리학회지 Vol.17 No.2

Jaeumgenby-tang(JGT) have been used in oriental medicine for many centuries as a therapeutic agent of vertigo cause by deficiency of qi(氣) and blood(血). Effect of Aurantii Fructus(AF) take off the phlegm by promoting the circulation of qi, Gastrodae Rhizoma(GR) has effects treating for headache, vertigo by calming the liver and suppressing hyperactivity of the liver-yang(陽). And, We reported that JGT adding AF · GR extract(JGTAG) was significantly increased regional cerebral blood flow(rCBF) by dilating pial arterial diameter(PAD). Therefor we designed to investigate whether JGTAG is mediated by adrenergic β-receptor, cyclooxygenase or guanylate cyclase in normal rats. The changes of rCBF and mean arterial blood pressure(MABP) were determinated by laser-doppler flowmetry(LDF), and the change of PAD was determinated by video microscope and width analyzer. The results were as follows in normal rats ; Pretreatment with propranolol(1mg/kg, i.v.) was significantly inhibited JGTAG induced increase of rCBF, PAD and MABP, and pretreatment with indomethacin(1mg/kg, i.v.) was significantly inhibited too. But pretreatment with methylene blue(10㎍/kg, i.v.) were accelerated JGTAG induced increase of rCBF and MABP, but pretreatment with methylene blue was inhibited JGTAG induced increase of PAD. This results suggest that the mechanism of JGTAG is mediated by adrenergic β-receptor and cyclooxygenase.

슬래브-기둥 접합부의 구속도 및 드롭패널에 따른 방폭 성능 평가

임광모,이주하 대한토목학회 2017 대한토목학회논문집 Vol.37 No.2

The numerical analysis was conducted to evaluate the behavior of slab-column connection subjected to blast loads using LS-DYNA. The typical form of slab-interior column connection for analysis was considered as a reference specimen and the drop panel slab-interior column was designed to verify the effects of drop panel. The slab-column connections, which were composed of interior, edge and corner column, were additionally analyzed to compare their confinement effects of specimens. Analysis results were contained the failure shape of connection, behavior of member and so on. From the results, the blast-resistant capacities of slab-column connection would be enhanced by reinforcing the drop panel. In addition, the performance of connections could be improved, when the confinement effects were enhanced. 본 연구에서는 폭발하중을 받는 슬래브-기둥 접합부의 거동을 해석적으로 분석하였다. 슬래브-기둥의 거동을 분석하기 위해 유한요소해석프로그램 LS-DYNA를 사용하여 폭발해석을 수행하였다. 대상 접합부의 형태는 일반적인 내부기둥형태의 슬래브-기둥 접합부와 기둥주위에 드롭패널(drop panel)을 보강한 접합부로 설정하였다. 또한, 슬래브에 의한 기둥의 구속도에 따라 내부기둥, 외부기둥 그리고 모서리기둥 시험체를 모델링하여 비교분석이 수행되었다. 해석결과는 접합부의 파괴형상, 단위부재의 거동 등을 포함하고 있다. 해석결과 드롭패널을 보강한 경우 슬래브-기둥 접합부의 거동이 향상되는 것을 확인하였으며 슬래브에 의한 기둥의 구속도가 감소할수록 거동이 저하되는 것을 확인하였다

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임광모(Lim, Kwang Mo),김경철(Kim, Kyong Chul),고경택(Koh, Kung Taek) 대한토목학회 2022 대한토목학회 학술대회 Vol.2022 No.10