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아치구조와 기둥간의 고유진동수비에 따른 아치구조물의 동적응답특성 (Dynamic Response of Arch Structure according to Natural Frequency Ratio between Arch and Columns)

  • 석근영;강주원
    • 한국공간구조학회논문집
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    • 제13권3호
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    • pp.65-72
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    • 2013
  • Long span arch structure is composed of arch as relatively flexible structure and column as relatively rigid structure. In this study, the characteristic of dynamic response is analyzed according to the natural frequency ratio between arch and columns. The result of analysis for arch as relatively vertical vibration mode is dominant, the influence of columns mainly appears at relatively high frequency band according to increase of 1st mode frequency in column. However, the dynamic characteristic of arch structure is expected to vary with not only frequency ratio but interaction between vibration modes of arch and columns.

기술개발의 난이도와 누출정도가 기업의 공동연구개발 선호에 미치는 영향

  • 유평일;최상채;임광선
    • 기술혁신연구
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    • 제5권1호
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    • pp.1-14
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    • 1997
  • Firms prefer in some specific conditions cooperative R&D to non-cooperative for developing technology. Previous studies on the conditions show firms want to choose cost-sharing type of cooperative R&D (the CS-RJV) rather than non-cooperative one when target technology is either 'relatively easy' or 'relatively difficult', and to join multiple-research or pararell-research type of cooperation (the PR-PJV) than to compete each other if technology is only 'relatively easy'. However, by introducing technological leakage as well as difficulty of technology. it is shown that this seemingly contrasted phenomenon almost disappears ; the PR-RJV can be also preferred by firms even is case of 'relatively difficult' technology only if there exists some extent of a technological leakage.

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산업별로 본 성별 임금격차에 관한 연구 (An Empirical Study on the Wage Gap by Industries)

  • 신경수
    • 경영과정보연구
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    • 제20권
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    • pp.61-83
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    • 2007
  • This study estimates gender wage gap by the Korean industries. The empirical findings are as follows: 1. The sex segregation by industries has not improved. 2. The average wage in $\ulcorner$electricity, transportation, warehousing, financial institutions$\lrcorner$ is relatively higher than others. On the contrary, the average wage in $\ulcorner$mining and manufacturing$\lrcorner$ and $\ulcorner$wholesale and retail, food, loading$\lrcorner$ is relatively lower than others. 3. The gender wage gap in $\ulcorner$electricity, transportation, warehousing, financial institutions$\lrcorner$ is relatively lower than others. On the contrary, the gender wage gap in $\ulcorner$mining and manufacturing$\lrcorner$ is relatively higher than others. The gender wage gap has declined annually. The gender wage gap in industries with lower wage level is higher. The decline of gender wage gap cannot be interpreted as a relaxation of sexual discrimination.

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STRONG CONVERGENCE THEOREMS FOR GENERALIZED VARIATIONAL INEQUALITIES AND RELATIVELY WEAK NONEXPANSIVE MAPPINGS IN BANACH SPACES

  • Liu, Ying
    • East Asian mathematical journal
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    • 제28권3호
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    • pp.265-280
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    • 2012
  • In this paper, we introduce an iterative sequence by using a hybrid generalized $f$-projection algorithm for finding a common element of the set of fixed points of a relatively weak nonexpansive mapping an the set of solutions of a generalized variational inequality in a Banach space. Our results extend and improve the recent ones announced by Y. Liu [Strong convergence theorems for variational inequalities and relatively weak nonexpansive mappings, J. Glob. Optim. 46 (2010), 319-329], J. Fan, X. Liu and J. Li [Iterative schemes for approximating solutions of generalized variational inequalities in Banach spaces, Nonlinear Analysis 70 (2009), 3997-4007], and many others.

20대 성인 남녀 발의 형태분류와 유형별 특성 분석 (Classification of Foot Type and the Characteristics According to Types)

  • 신우선;성옥상
    • 복식문화연구
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    • 제7권1호
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    • pp.38-51
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    • 1999
  • For a ideal construction of shoes, the exact analysis for shape and size of foot is necessary. This study was performed to classify and analyze the foot types of young males and females. For this, methods of cluster analysis, correspondence analysis and value of proportion were used. The subjects were 414 college students and 36 items, weight(1 item), height(8 items), length(6 items), breadth(6 items), girth(7 items), depth(3 items), slope(5 items) on foot were measured. The fundamental results of the study were as follow ; Difference in foot shape between men\`s and women\`s feet was not found below ankle girth. Based on cluster analysis the shapes of foot were classified into five groups, small but relatively slim group, small but relatively barrel group, middle group, large but relatively slim group and large but relatively barrel group. The types of foot had the distinguished dominant characteristics according to sex, weight and height. The results of this study show that there must be the suitable design of shoes for each foot type.

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낙동강 하구역 입자성 유기 규소의 계절적 변화 (Seasonal Variations of Particulate Biogenic Silica in the Nakdong River Estuary)

  • 문창호;권기영
    • 한국해양학회지
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    • 제29권1호
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    • pp.5-16
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    • 1994
  • 1991년 3월부터 1992년 4월까지 낙동강 하구에서 입자성 유기규소(PBSi), 규조류 및 규산염의 시공간적 변화를 조사하였다. 입자성 유기 규소의 양은 0.40∼11.45 ug-at/l의 범위에 있었으며 춘계 및 추계에 놓고 동계에 낮았으며 일반적으로 외해보 다는 내만에서 더 높았다. 수심별로는 상충이 가장 높고 중층에서 낮았으며 저층에서 다소 증가하는 양상이었다. 입자성 유기 규소는 규조류의 현존량과 밀접한 관계가 있 었으나 입자성 유기 규소와 개체수의 비율(약 500pgSi·cell/SUP -1/)이 높아 조사해 역에 많은 detritus성 유기규소가 존재하고 있음을 시사하고 있다. 규산염은 담수유입 이 주요 공급원이었으며 조사 해역에서 규조류의 성장 제한 요소로는 작용하지 않았 다. 다만 저층의 규산염 농도는 담수 유입외에 조사시기 직전의 표층의 입자성 유기 규소량과도 관계가 있는 것으로 예상된다. 비교적 낮은 입자성 유기 규소와 탄소(POC) 의 비(평균 0.20gSi·gC/SUP -1/), 높은 POC와 엽록소 a 의 비율 (약 900)로 볼 때 POC중 상당부분이 detrital POC 임을 시사하고 있다.

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평생교육에 대한 참여동기와 관여가 평생교육 학습자의 만족, 지속수강의도, 권유의도에 미치는 영향 (The Effect that Participating Motives and Involvement about Lifelong Education have on the Learners' Satisfaction, Continuous Intention to Take Courses, and Recommendation Intention)

  • 김철호
    • 한국콘텐츠학회논문지
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    • 제15권6호
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    • pp.575-588
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    • 2015
  • 본 연구의 목적은 평생교육에 대한 참여 동기와 관여가 평생교육 학습자의 만족, 지속 수강 의도, 그리고 권유 의도에 미치는 영향을 실증적으로 살펴보는데 있다. 평생교육 참여 동기는 실용적, 오락적, 관계적, 목표지향적 참여 동기로 구분하고, 평생교육에 대한 관여는 상황적 관여와 지속적 관여로 구분하였다. 정량적 연구 결과, 실용적 참여 동기와 오락적 참여 동기는 평생교육에 대한 상황적 관여와, 목표지향적 참여 동기와 관계적 참여 동기는 평생교육에 대한 지속적 관여와 상관관계가 높은 것으로 나타났다. 아울러, 교수 방법에 대한 만족에는 실용적 동기가, 시설 편리성에 대한 만족에는 오락적 동기가, 소통에 대한 만족에는 관계적 동기가, 콘텐츠 품질에 대한 만족에는 목표지향적 동기가 상대적으로 더 높은 영향을 미치는 것으로 나타났다. 평생교육에 대한 상황적 관여는 콘텐츠 품질에 대한 만족에, 지속적 관여는 교수 방법에 대한 만족에 상대적으로 더 큰 영향을 미치는 것으로 나타났다. 평생교육 지속 수강 의도에는 콘텐츠 품질에 대한 만족이, 평생교육 권유의도에는 시설편리에 대한 만족이 상대적으로 더 큰 영향력을 미치는 것으로 나타났다.

금융직 여성 근로자의 직무스트레스 실태와 근골격계질환 자작증상과의 관련성 연구 (A study on the relationship between job stress and subjective symptoms associated with musculoskeletal disorders of the financial working woman's)

  • 조기홍;최순영;박동현
    • 대한안전경영과학회지
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    • 제9권4호
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    • pp.17-28
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    • 2007
  • This study tried to identify the job stress characteristics of female bank workers and the relationship between their stress and symptoms associated with musculoskeletal disorders(MSDs). The total number of 587 female bank tellers have been participated in this study. Specifically, questionnaire surveys regarding job stress and MSDs symptoms were conducted. On the basis of the results from the survey using Korean version of job stress questionnaire with 24 questions, stress scores associated with job requirement and job flexibility were relatively high. The job stress levels regarding job demand, organizational system, occupational climate at the work place were relatively high for the full time workers while the job stress levels regarding insufficient job control, job stability, interpersonal conflict, lack of reward were relatively high for the part time worker. The workers with longer total work years had relatively high job stress associated with interpersonal conflict, and organizational system while the workers with longer work years at the current job had relatively high job stress associated with occupational climate. Also, the workers with longer working hours a day had relatively high job stress associated with job demand, interpersonal conflict, organizational system, and occupational climate. According to the relationship identified in this study, symptoms at the neck, shoulder, hand, low back. leg were associated with the stress levels in terms of job flexibility, interpersonal conflict, job requirement, job stability. In conclusion, female bank workers are exposed to job stress due to their specific job characteristics and there has been certain relationships between their job stress and MSDs symptoms.

광고 창의성 평가에 대한 광고주, 광고 제작자, 소비자 간의 상호인식 연구: 상호지향성 모델의 확장 적용 (Mutual Perceptions among Clients, Agencies, and Consumers on the Evaluation of Ad Creativity: Extending Application of the Co-Orientation Model)

  • 김봉철;최명일;이진우
    • 광고학연구
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    • 제25권1호
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    • pp.179-201
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    • 2014
  • 본 연구는 확장된 상호지향성 모델을 적용하여 광고 창의성 평가에 대한 광고주, 광고 제작자, 소비자 간의 상호인식을 살펴보고자 했다. 이를 위해 창의성이 있다고 평가된 광고물을 대상으로 광고 창의성 평가척도로 타당성이 확보된 독창성, 적합성, 명료성, 상관성에 대해 광고주, 광고 제작자, 소비자 간의 객관적 일치도와 주관적 일치도, 정확도 등을 살펴보았다. 분석결과를 살펴보면, 객관적 일치도의 경우 광고주와 제작자 사이에서 비교적 높게 나타나고, 제작자와 소비자 사이에서는 비교적 낮게 나타났다. 주관적 일치도는 광고주 차원에서는 비교적 높게 나타나고 있으나 제작자 차원에서는 비교적 낮게 나타났다. 정확도의 경우는 제작자 인식과 광고주가 생각하는 제작자 인식, 소비자 인식과 제작자가 생각하는 소비자 인식에서는 높게 나타났으나 광고주 인식과 제작자가 생각하는 광고주 인식에서는 낮게 나타났다. 이 연구결과를 바탕으로 광고주나 광고 제작자는 광고 창의성에 대한 소비자의 생각을 많이 고려할 필요가 있다.

부하 형태에 따른 전력패턴 분석 (Analysis of Power Pattern According to Load Types)

  • 황미용;조승준;이순형;최용성
    • 한국전기전자재료학회논문지
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    • 제36권4호
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    • pp.369-375
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    • 2023
  • In this paper, we compared and analyzed the power load patterns of dormitory buildings and office buildings to use them as basic data (demand analysis and capacity design) for the design and operation of microgrids for multi-use facilities, and the following conclusions were got. During the daytime on regular weekdays, the power consumption load pattern of office buildings was relatively large at 264.0~332.3 kWh, and during the evening hours, the power consumption load pattern of dormitory buildings was relatively large at 233.0~258.3 kWh. In the case of vacation, during the daytime on weekdays, the power consumption load pattern of office buildings was relatively large at 279.1~407.4 kWh, and in the evening, the power consumption load pattern of dormitory buildings was relatively high at 280.1~394.1 kWh. During the daytime on regular weekends, the power consumption of dormitory-type buildings was relatively high at 133.5~201.6 kWh, and it was found that the power consumption of dormitory-type buildings appeared relatively high at 187.5~252.1 kWh. During a vacation in the daytime on weekends, the power consumption of dormitory-type buildings was found to be 186.5 kWh~ and 218.6 kWh. The increase in power consumption during a vacation (December-February) compared to normal (April-June) was thought to be due to an increase in electricity demand, and the reason for the higher power consumption in dormitory buildings during the vacation was due to reduced working hours in office buildings.