• Title/Summary/Keyword: 상사의 성과

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Estimation of Prestressed Tension on Grouted PSC Tendon Using Measured Elastic Wave Velocity (응력파속도를 이용한 부착식 PSC 텐던의 긴장력 추정)

  • Kim, Byeong Hwa;Jang, Jung Bum;Lee, Hong Pyo;Lee, Il Keun
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.32 no.5A
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    • pp.289-297
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    • 2012
  • This study proposes an experimental formula that can estimate the applied tensile stress of a bonded PSC by measuring a longitudinal stress wave velocity of tendon. To develop practical formula, the various bonded PSC specimens are constructed with different levels of prestresses. For all the bonded PSC specimens, the longitudinal impact-echo tests are repeated with various experimental conditions. Considering a few influence factors such as temperature, length and the number of strands, the application of the law of similarity results in a nondemensional experimental formula that could estimate existing tensile stress on tendon by measuring its longitudinal stress wave velocity. Next, a feasibility study of proposed approach has been conducted for a real reactor building containment. The estimated stress levels of two vertical tendons embedded in the nuclear plant are close to their design values.

Plane Experiment Study on Drainage Capacity of Sluice Gate by Slope and Length of Apron (Apron 경사 및 길이에 따른 수문구조물 배수능 평면실험 연구)

  • Yoon, Kwang-Seok;Yeo, Kyu-Dong
    • Proceedings of the Korea Water Resources Association Conference
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    • 2005.05b
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    • pp.1031-1035
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    • 2005
  • 조력발전 건설사업에서 우선적으로 고려되어야 할 사항은 조수간만에 의해 외해부와 조지부 사이를 이동하는 해수를 적절히 소통시키는 것이다. 즉, 조력발전소에서 수문구조물의 목적은 주어진 조건 하에서 계획된 유량을 충분히 그리고 안전하게 배제시키는 것이다. 본 연구에서는 수문구조물에 대한 Apron의 길이와 경사의 변화에 의한 외해 조위와 시화호 수위차 조건에 따른 유량계수를 구해 배수능력과 유$\cdot$출입부, 외해, 시화호 및 큰가리섬 주위의 흐름 특성을 검토하고자 하였다. 이를 위해 시화호를 실험대상으로 하여 구조물을 중심으로 외해측으로 1,000m, 시화호측으로 500m, 폭 1,500m의 범위를 선정하였다. 수리모형을 1대50의 축척비로 제작하였다. 표 1은 실험별 Apron과 수문구조물의 제원을 나타내며, 수문구조물은 7기로 이루어졌다. 시화호의 흐름은 관성력과 중력이 지배력이 되며, 이때 상사법칙은 Froude 상사법칙을 적용할 수 있다. 실험III은 실험II에서 Apron의 경사를 1대10에서 1대5로 수정한 실험으로 수위조건은 외해측 -2.530 EL.m이고, 시화호측은 -1.603EL.m이다. 유량계수를 산정하기 위하여 6개 실험조건을 기본계획에서 제시된 수위-조위 조건에서 수위차 및 통수유량을 분배하여 결정하였고 유량계수 산정식에 따라 구조물의 유입부와 유출부에서 유속-면적법에 의해서 유량을 측정하였다. 그리고 국부평면 실험모형에서의 전체적인 해류의 흐름을 분석하기 위해 2차원 유속을 측정하였다. 또한, 유$\cdot$출입부 안정성을 검토하기 위해 Apron 지점과 수문구조물 지점에 3점법으로 유속을 측정하였으며, 색소를 이용하여 유황을 관찰하였다. 시화호와 외해의 수위차가 1.011 m일 때의 전체 수문구조물을 통과하는 유량을 비교한 결과, 실험II 및 실험III의 통과유량은 각각 $10,924m^3/s$$10,075m^3/s$로서 실험 I의 $2,757m^3/s$에 비해 통수능이 많이 개선되었음을 알 수 있다.

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Evaluation of the Optimum Interpolation for Creating Hydraulic Model from Close Range Digital Photogrammetry (근접수치사진측량으로 수리모형해석에 적용 시 최적보간법 평가)

  • Choi Hyun
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.23 no.3
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    • pp.251-260
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    • 2005
  • The Development of CCD has contributed to great advancement in mapping technology with giving benefits to research community of photogrammetry. The purpose of this paper is to find the best selection of interpolation method for creating a terrain model form close range digital photogrammetry. T-test as a kind of statistical analysis was conducted to analyze the similarity of hydraulic model with close range digital photogrammetry and trigonometric leveling. Also, many interpolation methods such as inverse distance, kriging, nearest neighbor and TIN about the hydraulic model interpolation were conducted to compare the results for computer to display actual terrain an optimum interpolation of the digital elevation model form close range digital photogrammetry. The results revealed that kriging and TIN interpolation were efficient methods to judge the hazard interpolation law by analyzing geometric similarity of hydraulic model against hydraulic model application.

The Effects of Pay Satisfaction on Job Satisfaction and Turnover Intention (임금만족이 직무만족과 이직의도에 미치는 영향)

  • Zhou, Sicong;Lee, Jeong Eon
    • The Journal of the Korea Contents Association
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    • v.16 no.10
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    • pp.693-700
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    • 2016
  • The current study examined the relationship between satisfaction with pay and performance. The purpose of this study is not only to analyse the effect of pay satisfaction on job satisfaction and turnover intention, but to verify the moderating effect of LMX in order to provide a useful theoretical and managerial implication. The empirical results reveal that satisfaction of pay positively affects job satisfaction, but has a negative impact on turnover intention. It is also found a moderation effect of LMX between pay satisfaction and performance. The empirical results imply that an effective compensation management should be applied and an enhanced LMX effort has to be made to motivate employee.

Aerodynamic Noise Analysis Using the Permeable Surface for UH-1H Rotor Blade in Hovering Flight Condition (UH-1H 로터 블레이드의 제자리 비행 시 투과면을 이용한 원방 소음 해석)

  • Kim, Ki Ro;Park, Min Jun;Park, Soo Hyung;Lee, Duck Joo;Park, Nam Eun;Im, Dong Kyun
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.46 no.5
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    • pp.376-384
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    • 2018
  • The aerodynamic far-field noise was computed by an acoustic analogy code using the permeable surface for the UH-1H rotor blade in hover. The permeable surface surrounding the blade was constructed to include the thickness noise, the loading noise, and the flow noise generated from the shock waves and the tip vortices. The computation was performed with compressible three-dimensional Euler's equations and Navier-Stokes equations. The high speed impulsive noise was predicted and validated according to the permeable surface locations. It is confirmed that the noise source caused by shock waves generated on the blade surface is a dominant factor in the far-field noise prediction.

Behavior of Non-buoyant Round Jet under Waves (파랑수역에서 비부력 원형 제트의 거동)

  • Ryu, Yong-Uk;Lee, Jong-In;Kim, Young-Taek
    • Journal of Korean Society of Coastal and Ocean Engineers
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    • v.19 no.6
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    • pp.596-605
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    • 2007
  • The behavior of a non-buoyant turbulent round jet discharging horizontally was investigated experimentally. The instantaneous velocity field of the jet was obtained using the particle image velocimetry (PIV) method and used to calculate the mean velocity field by phase-averaging. This study tested regular waves with a relatively small wave height for a wavy environmental flow. The centerline and cross-sectional velocity profiles were reported to demonstrate the effect of the waves on the jet diffusion in respect of wave height and wave phase. The wave phase effect was studied for three phases: zero-upcrossing point, zero-downcrossing point, trough. From the results, it is found that the centerline velocity decreases and width of the cross-sectional profile increases as the wave height increases. In addition, the self-similarity of the cross-sectional profile appears to break down although the width of each case along the axial distance does not vary significantly. The phase effect is found to be relatively small compared to the wave height effect.

The Effect of Organizational Citizenship Behavior Of Long-term Care Hospital Nurses (요양병원 간호사의 조직시민행동에 미치는 융복합적 영향요인)

  • Hyeon, Il-Seon;Lee, So-Young
    • Journal of Convergence for Information Technology
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    • v.10 no.2
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    • pp.63-69
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    • 2020
  • The purpose of this study examine to identify the mediating Organizational citizenship behavior in the relation Authentic leadership and Organizational support. Data were collected by self-report questionnaires targeting 229 caregiver in Daegu city and Gyeongsangbuk-do city. Data were analyzed with SPSS/PC ver. 21.0 programs. There were significantly positive correlations between toward the Organizational citizenship behavior, Authentic leadership and Organizational. As a result of analyzing the main factors the level of care performance for authentic leadership and Organizational support to be significant explanatory variables and this model's explanatory power was 50.0%. Therefore, it is necessary required to improve the Organizational support and leader's authentic leadership for the nursing work performance.

Reversed Cyclic Latcral Load Test of A 2-Bay 2-Story Reinforced Concrete Frame With Seismic Detail (내진상세를 가진 2경간 2층 철근콘크리트 골조의 반복횡하중 실험)

  • Lee, Han-Seon;Woo, Sung-Woo
    • Magazine of the Korea Concrete Institute
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    • v.8 no.6
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    • pp.183-193
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    • 1996
  • The objective of this study is to investigate the characteristics of elastic and inelastic bekavior of ductile momenting-resisting reinforced concrete frame subjected to reversed lateral loading such as earthquake excitations. For this purpose, a 2-bay 2-story reinforced concrete plane frame with seismic detail was designed and one 1/2.5-scale subassemblage was manufactured according to the required similitude law. Then, the reversed load test under the displacement control was performed statically to this subassemblage. Finally, the results of this test were analysed regarding to (1) the design load vs actual strength, (2) degradation in stiffness and strength. (3) failure mode or energy dissipation. (4) local deformations.

The Effect of Call Center Consultant 's Emotional Labor on Burnout: The Moderating Effect of Resilience and Social Support (콜센터 상담원의 감정노동이 소진에 미치는 영향: 회복 탄력성과 사회적 지지의 조절효과)

  • Park, Hayoung;Kim, Jungkyu
    • Stress
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    • v.26 no.4
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    • pp.340-349
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    • 2018
  • Background: The purpose of this study was to examine the moderating effect of resilience and social support to analyze that call center consultants' emotional labor impacts on the burnout. Methods: A survey questionnaire was conducted to people who work at call center in Gwangju and Deagu. The data from 444 were analyzed. Results: The result from the hierarchical multiple regression is as follows. First, deep acting decreased burnout, but surface acting of emotional labor increased burnout. Also, frequency of emotion display, variety of emotion required to be expressed and attentiveness to required display rules increased burnout. Second, Resilience had moderating effect between deep acting and burnout. Third, the moderate effect of interaction of social support from leader with surface action was found at burnout. Also, moderating effect of social support from leader were shown in frequency of emotion display with burnout and attentiveness to required display rules with burnout. Fourth, social support from colleague did not have buffering effect on emotional labor and burnout. Conclusions: It is expected that the moderator variables identified in this study can be used for prevention and treatment of burnout caused by emotional labor.

Identification of Latent Profiles in Perception of Work Environment among Workers in Residential Facilities for People with Disabilities (장애인거주시설 종사자의 직무환경인식 잠재프로파일에 따른 직무만족도 차이)

  • Lee, Hyun Jung
    • Journal of the Korea Convergence Society
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    • v.10 no.8
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    • pp.237-243
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    • 2019
  • This study used latent profile analysis to identify heterogeneous subgroups with respect to the perception of work environment among workers in residential facilities for people with disabilities. The final model yielded five latent profiles of the perception of work environment: 'low workload group' who scored low in time pressure and job responsibility, 'discrimination perception group' who scored low in supervisor support and high in sex and academic/regional discriminations, 'positive perception group' who scored high in work autonomy and peer and supervisor supports, 'high workload group' who scored high in workload, time pressure, and job responsibility, and 'average group' who scored average in most areas. In the case of job satisfaction, positive perception group was the highest, followed by average group, low and high workload groups, and discrimination perception group.