• 한국컴퓨터정보학회논문지
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• 제19권12호
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• pp.275-285
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• 2014

정보통신기술들(information and communication technology: ICT)의 진화는 우리의 의사소통과 커뮤니케이션 문화를 변모시키며 사이버커뮤니케이션 시대로의 촉진을 유인하고 있다. ICT 발달에 따라 '퍼스널'하면서도 사회적 연결과 소통을 강화시킨 '소셜'의 융합이 촉진되고 있으며, 그 중심에 소셜네트워크서비스(social network service: SNS)가 있다. SNS는 개방성, 확장성, 실시간성 등과 같은 발달된 기술을 배경으로 우리생활에 중요한 영역으로 자리매김하고 있지만, 예기치 못했던 부작용으로 사회적 우려를 낳고 있다. 이에 본 연구에서는 SNS스트레스를 발생시키는 요인인 스트레서(stressor)를 파악하고 사용중단의도에 미치는 영향을 실증하는 것을 주요목적으로 하였다. 연구결과, '정보과부하', '사생활침해', '사용불안', '사용복잡', '빠른 변화속도'가 SNS스트레스 영향요인으로 나타났다. 그리고 SNS스트레스는 사용중단의도에 유의한 영향을 미치는 것으로 확인되었다. 본 연구는 개인적 차원의 테크노스트레스 및 SNS사용중단의도에 관한 논의를 확장시키고 실무적 가이드라인을 제공한다는 점에서 의의를 찾을 수 있다.

• Steel and Composite Structures
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• 제4권5호
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• pp.355-365
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• 2004

A new reduction method of residual stress in welding joint is proposed where welded metals are shaken during welding. By an experiment using a small shaker, it can be shown that tensile residual stress near the bead is significantly reduced. Since tensile residual stress on the surface degrades fatigue strength for cumulative damage, the proposed method is effective to reduction of residual stress of welded joints. The effectiveness of the proposed method is demonstrated by the response analysis using one mass model with nonlinear springs.

• 한국전자통신학회논문지
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• 제19권4호
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• pp.741-752
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• 2024

사회적으로, 정보보안에 대한 필요성이 증가하면서, 조직들은 정보보안을 위한 기술적 투자를 강화하고 있다. 본 연구는 상대적으로 관심이 부족한 내부자의 정보보안 준수 체계 강화를 위한 방안을 제시하였다. 특히, 조직에서 개인의 행동 원인을 설명하는 계획된 행동이론을 반영하여 기술 스트레스와 조직 공정성을 통해 행동이 변화할 수 있음을 밝히고자 하였다. 연구는 정보보안 도입 기업에 근무하는 조직원에 설문 조사를 하였으며, 383건의 표본을 활용하여 가설 검정을 하였다. 검정 결과, 정보보안 기술에 의한 스트레스(과부하와 불확실성)가 조직원의 태도를 감소시키고, 조직 공정성이 주관적 규범을 높였으며, 자기 효능감과 함께 준수 의도에 영향을 주었다. 더불어, 조직 공정성이 과부하 및 불확실성의 태도에 미치는 부정적 영향을 완화하는 것을 확인하였다. 연구 결과는 조직의 부정적 보안 환경을 개선하기 위한 조직 공정성 조건을 제시하여, 조직 내부의 보안 성과 달성을 위한 방안 마련에 도움을 줄 것으로 기대한다.

• Smart Structures and Systems
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• 제8권4호
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• pp.413-431
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• 2011

Under the external shearing stress, the external radial stress and the electric potential simultaneously, the piezoelectric hollow cylinder transducer is studied. With the Airy stress function method, the analytical solutions of this transducer are obtained based on the theory of piezo-elasticity. The solutions are compared with the finite element results of Ansys and a good agreement is found. Inherent properties of this piezoelectric cylinder transducer are presented and discussed. It is very helpful for the design of the bearing controllers.

• Structural Engineering and Mechanics
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• 제61권6호
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• pp.747-754
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• 2017

Exact solutions for stresses for an infinite rectangular plate perforated by two circular holes of different radii subjected to uni-axial or bi-axial uniform loads are investigated using the Airy stress function. The hoop stresses occurring at the edge of the circular hole are computed and plotted. Comparisons are made for the stress concentration factors for several types of loading conditions.

• Ocean Systems Engineering
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• 제1권2호
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• pp.121-130
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• 2011

One of the prevailing models that describe the stress corrosion is represented by an exponential dependence between rate of corrosion and stress, suggested by Gutman, Zainullin and Zuripov. This study revisits the exponential model and derives analytical expressions for the structures' durability which is postulated as the time for stress level to reach its yield value. Comparison is conducted with other possible models, namely with linear, quadratic or cubic cases.

• Structural Engineering and Mechanics
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• 제5권2호
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• pp.127-135
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• 1997

Patch recovery attempts to derive a more accurate stress filed over a particular element than the finite element shape function used for that particular element. Elements that have a free edge being the boundary to the structure have particular stress relationship that can be incorporated to the stress field to improve the accuracy of the approximation.

• Journal of Mechanical Science and Technology
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• 제17권11호
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• pp.1674-1681
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• 2003

Photoelastic experiment has two significant problems. The first problem is manufacturing a model specimen for complicated shapes of structures. The second problem is residual stress contained in the photoelastic model material. In this paper, the stress optic law that can be effectively used on photoelastic model materials with residual stress is developed. By using the stress optic law as developed in this research, we can obtain good results in photoelastic experiments using model material in which residual stress is contained. It is assured that the stress optic law developed in this research is useful. Therefore, it is suggested that the stress optic law considering residual stress can be applied to the photoelastic experiment for the stress analysis of the composite materials or bi-materials in which the residual stress is easily contained.

• Structural Engineering and Mechanics
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• 제16권4호
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• pp.405-422
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• 2003

Scaled brick masonry panels were tested under cyclic unialxial compression loading to evaluate its deformation characteristics. An envelope stress - strain curves, a common point curves and stability point curves were obtained for various cyclic test conditions. Loops of the stress-strain hysteresis were used to determine the energy dissipation for each cycle. Empirical expressions were proposed for the relations between energy dissipation and envelope and residual strains. These relations indicated that the decay of masonry strength starts at about two-third of peak stress.

• Structural Engineering and Mechanics
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• 제6권1호
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• pp.115-124
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• 1998

A novel boundary stress resolution method is suggested in this paper, which is based upon the displacements of finite element analysis and of high precision with stress boundary condition strictly satisfied. The method is used to modify the Zienkiewicz-Zhu ($Z^2$) a posteriori error estimator and for the h-version adaptive finite element analysis of crack problems. Successful results are obtained.