• Journal of Information Technology Applications and Management
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• 제27권6호
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• pp.15-29
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• 2020

Previous studies on the relationship between stress and performance have shown inconsistent results. Thus, this study focused on the effect of challenging stress among the two types of stress types and investigated the nonlinear relationship between the challenging stress and the performance. In particular, performance was divided into job performance, which is related to in-role behavior, and organizational citizenship behavior, which is characterized as extra-role behavior. Empirical results using 222 samples of Chinese workers have showed that challenging stress had a nonlinear relationship with job performance and organizational citizenship behavior. However, it was found that the shape of nonlinear relationship of the challenging stress on job performance and organizational citizenship behavior was slightly different. Finally, the theoretical and practical implications of this paper and future research directions are discussed.

• 물과 미래
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• 제23권3호
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• pp.373-384
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• 1990

홍수기중 저수지운영의 목적은 댐 하류의 피해를 경감시키고 홍수 말기의 용수보존도 고려하는데 있다. 본 논문은 모의 기법을 응용하여 시간별 실시간 저수지 운영 모형을 제시한다. 운영 방안은 여수로를 통한 최대방류량을 최소화 하는 방류량 계열을 구했으며 예측유입량의 불확실성도 고려하였다. 병렬 저수지의 경우에는 합류점에의 방류량계열을 최소화하도록 유도하였으며, 본고에서는 단일 및 병렬 저수지에 적용할 수 있는 모형의 이론과 절차를 제시한다.

• 식물분류학회지
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• 제49권4호
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• pp.275-281
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• 2019

One key step in the plant restoration process is the collection of seeds from the field. For the selection of source populations of target plant species for translocation purposes (reintroduction or reinforcements), several approaches are possible. A practical method involves the use of data from reciprocal transplant studies. If no direct data are available, knowledge of population genetics and the phylogeography of the target species can serve as an alternative. In this short review, we briefly propose guidelines for those collecting seeds for plant species restoration based on population genetics theory, focusing on two main questions: Where does the plant material come from and how are sources designated, and how are seeds efficiently collected from local populations? While genetic data on a larger scale (phylogeography and population genetics) are needed to form a reply to the first question, similar data on a smaller scale (fine-scale genetic structures within populations) are necessary to shed light on the second issue.

• Geomechanics and Engineering
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• 제13권6호
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• pp.1027-1044
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• 2017

Membrane penetration is the most important factor influencing the measurement of volume change for triaxial consolidated-drained shear test for coarse-grained soil. The effective pressure p, average particle size $d_{50}$, thickness $t_m$ and elastic modulus $E_m$ of membrane, contact area between membrane and soil $A_m$ as well as the initial void ratio e are the major factors influencing membrane penetration. According to the membrane deformation model given by Kramer and Sivaneswaran, an analytical solution of the membrane penetration considering the initial void ratio is deduced using the energy conservation law. The basic equations from theory of plates and shells and the elastic mechanics are employed during the derivation. To verify the presented solution, isotropic consolidation tests of a coarse-grained soil are performed by using the method of embedding different diameter of iron rods in the triaxial samples, and volume changes due to membrane penetration are obtained. The predictions from presented solution and previous analytical solutions are compared with the test results. It is found that the prediction from presented analytical solution agrees well with the test results.

• 물과 미래
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• 제27권1호
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• pp.101-109
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• 1994

본 연구에서는 배수갑문, 보등의 수리구조물 하류부에서 발생되는 와에 의한 2차선굴의 물리적 특성을 규명하고, 와의 평균 마찰속도를 에너지 보존법칙에 의해 산출하였다. 또한 와에 의해 발생되는 선굴량을 마찰속도에 의한 소류력 및 난류에 의한 양력의 항으로써 정량적으로 산출하였다. 분석 결과 수리구조물 하류부에서 발생되는 와는 하천 사주 뒷면에서 발생되는 그것에 비해 강도가 세고 끊임없이 발생되는 대규모 난류성을 지니고 있음을 알 수 있었다. 또한 와의 마찰속도는 물받이 끝단의 유속으로 나타낼 수 있으며, 따라서 하상입자의 성질과 흐름의 유속을 알면 선굴량을 산정할 수 있는 방법을 제시하였다.

• The Journal of Asian Finance, Economics and Business
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• 제9권6호
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• pp.95-104
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• 2022

This study investigates the complex mechanism of work-family conflict affecting counterproductive behavior of employees based on resource conservation theory and 417 valid samples by using polynomial regression and response surface analysis. Counterproductive work behavior refers to any intentional behavior of an individual that has potential harm to the legitimate interests of the organization or its stakeholders. Results show that first, work-to-family conflict (WFC) and family-to-work conflict (FWC) had four matching types. Compared with "high WFC-low FWC," "low WFC-high FWC" and "low WFC-low FWC" matching conditions, the employee self-control resource depletion and counterproductive work behavior (CWB) are at their highest under "high WFC-high FWC" congruence matching condition. Second, the joint effect of WFC and FWC has a U-shaped relationship with counterproductive behavior. Compared with the "high WFC-low FWC" match state, the level of CWB in the "low WFC-high FWC" match state is higher. Third, the depletion of self-control resources played a mediating role in the effect of WFC on counterproductive behavior. Fourth, emotional intelligence moderated the relationship between the congruence of WFC and FWC and self-control resource depletion. Emotional intelligence was higher, and the positive relationship between the congruence of WFC and FWC and self-control resource depletion was weaker.

• 태양에너지
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• 제10권2호
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• pp.77-85
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• 1990

본 조사에서는 자연광(일광, 혹은 주광 : sunlight)을 도입하는데 있어 현휘(glare)나 강한 휘도군을 지양하고 하절기의 과열을 방지하여 쾌적한 생활 환경을 조성하는데 유용한 주광 제어 장치들의 종류와 특성에 대해 간략히 알아보고 이를 적용한 외국의 실제 예를 소개하였다. 특히, 미국 Utah주 Salt Lake City에 위치한 Johnson Controls사의 지사 건물은 자연채광의 한 방편으로 light shelf와 고창을 이용하여 에너지 절약과 실내 빛 환경의 개선을 도모한 좋은 표본이라 하겠다. 에너지 자원을 거의 수입에 의존하고 있는 우리의 실정을 감안한다면 우리도 이 분야에 대한 다각적인 검토와 연구가 이루어져 건물에너지의 절약을 꾀하여야 할 것이다.

• The Journal of Asian Finance, Economics and Business
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• 제7권2호
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• pp.229-236
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• 2020

Researchers generally argue that sexual harassment influence poor female employee organizational attitudes. However, these relationships have been not always observed. Depending on the organizational support theory, this study extended the content domain of sexual harassment research by examining the role of perceived organizational support, on these relationships. For this, this study used a survey method and multiple regression analyses with Korean 285 female employees. As results, first, the more unwanted sexual attention employees perceived, they were less likely to show their organizational citizenship behavior. Second, the more sexual coercion employees perceived, they were more likely to have their work-family conflict. Third, the negative relationship between unwanted sexual attention and their organizational citizenship behavior are stronger for employees low rather than high in perceived organizational support. Finally, the positive relationship between sexual coercion and work-family conflict are stronger for employees low rather than high in perceived organizational support. The findings suggest the adaptive function of perceived organizational support employees hold in organizational behavior. This is the first study to examine the interaction between perceived organizational support and sexual harassment of female workers with organizational citizenship behavior and work-family conflict. This study also provides guidance for administrative managerial practices.

• The Journal of Asian Finance, Economics and Business
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• 제9권4호
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• pp.345-355
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• 2022

Excellent employees are those who take on extra responsibilities and commitments at work. Hence, employees must pay attention to out-of-role activities that can help the company perform better. When a person takes on more responsibilities than he can handle, they will have to deal with the issue of work-family balance. This paper examines how the consistency of WFC affects employees' organizational citizenship behavior (OCB) using the Resource Conservation Theory. This study uses empirical research methodologies to assess 417 employees as a sample. (1) When the matches of work-to-family conflict (WFC) and family-to-work conflict (FWC) are consistent, the employee self-control resource depletion level is lower, and OCB is higher in the "high-high" consistency matching state. (2) The "low-high" match had a higher OCB than the "high-low" match when the WFC and FWC matches were inconsistent. (3) In the process of WFC affecting OCB, the depletion of self-control resources acts as a mediating factor. (4) Emotional intelligence plays a moderating role in the whole model. The lower the emotional intelligence was, the stronger the positive relationship between the consistency of WFC, FWC, and self-control resource depletion was.

• Geomechanics and Engineering
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• 제10권4호
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• pp.387-403
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• 2016

In this paper, an integrated model for the wave (current)-induced seabed response is presented. The present model consists of two parts: hydrodynamic model for wave-current interactions and poro-elastic seabed model for pore accumulations. In the wave-current model, based on the fifth-order wave theory, ocean waves were generated by adding a source function into the mass conservation equation. Then, currents were simulated through imposing a steady inlet velocity on one domain and pressure outlet on the other side. In addition, both of the Reynolds-Averaged Navier-Stokers (RANS) Equations and $k-{\varepsilon}$ turbulence model would be applied in the fluid field. Once the wave pressures on the seabed calculated through the wave-current interaction model, it would be applied to be boundary conditions on the seabed model. In the seabed model, the poro-elastic theory would be imposed to simulate the seabed soil response. After comparing with the experimental data, the effect of currents on the seabed response would be examined by emphasize on the residual mechanisms of the pore pressure inside the soil. The build-up of the pore water pressure and the resulted liquefaction phenomenon will be fully investigated. A parametric study will also be conducted to examine the effects of waves and currents as well as soil properties on the pore pressure accumulation.