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RC Arch Deck Development and Performance Evaluation for Enhanced Deck Width
Dal?Hun Yang,Min?Jae Kwon,Gi?Ha Eom,Jang?Ho Jay Kim 한국콘크리트학회 2018 International Journal of Concrete Structures and M Vol.12 No.6
Due to extreme business competitions in bridge construction industries, the cost reduction became the most important issue in winning a contract bidding. The largest bridge construction cost saving can be obtained by using precasted construction method and by reducing required number of girders, columns, and decks in the bridge system. Therefore, an precasted arch deck system is proposed to widen the lateral span of the deck, which can result in reducing the number of required I-type PSC girders for construction cost saving. A usual lateral width of a flat deck is 1.5–2.0 m, but the width of arch deck is 2.5 m, an increase of 25–60%. Therefore, for a PSC girder bridge with a total width 10 m, a number of required girders needed for ordinary flat RC deck and arch deck is 5 and 4, respectively. This means that one less girder can be required, which means that 20% of girder construction cost can be achieved by using arch deck over ordinary flat deck. In this study, precasted RC arch deck is developed and manufactured to evaluate structural performance of the deck. The study results showed that arch deck has performance exceeding ordinary flat deck and can be used as alternative decks for precasted PSC I-girder bridge construction. The study results are discussed in detail in the paper.
송호달,정길채 용인대학교 산업경영연구소 1998 산업경영논총 Vol.4 No.-
Environmental expenditures are a major issue facing Korean corporations with increasing concern for environmental information by business enterprises has been the subject of substantial research for the past several decades. Surveys in a number of studies show and increasing trend of disclosing such information statements. there has been an increase of empirical studies on reporting practices in recent years(Ingram and Frazier, 1980; Wiseman, 1982; Freedman and Jaggi, 1996) These studies provide insights into the number of companies disclosing environmental information. Korea economy has accelerated the expansion and globalization of business enterprises in recent years. Many cases of river pollution caused by effluents discharged by some Korea firms have caused even greater concern about the environmental damages. The purpose of this study is to investigate the nature of the first environmental disclosure by Korean listing corporations in terms of quantity of the investment and expenditures. This study provides the empirical evidence in Korea regarding the environmental investment and expenditure disclosure in corporate financial statements. And this study suggests managerial implications about the treatments of environmental expenditure. The sample firms comprised all of the 660 companies that disclosed some amount of environmental information in the supplementary footnotes of 1997 audited interim financial statements in accordance with GAAP.
대학의 교육원가 분석 : 용인대학교를 중심으로 Focus on the yongin University
송호달 용인대학교 산업경영연구소 2000 산업경영논총 Vol.6 No.-
It is necessary for every university to calculate the its cost for the purpose of rationally planning and operation the educational expenses budget which is a kind of the strategic policy to adapt in a educational environmental changes. The cost analysis of university education should be based upon the concept of cost accounting. However, we are not really recognize the concept of cost accounting in our universisty level. This paper investigates the actual costs of educational expenses based upon the every college's financial statements at Yongin University for the periods of 1997 to 1999. The results will be applied to the standard educational cost accounting and tuition &ees as a fundamental basis in the future.
웹사이트 이용의도에 대한 동기적 요인의 영향 : 인터넷 쇼핑몰을 중심으로 Perspectives of Internet Shopping Mall
손달호 한국경영과학회 2004 經營 科學 Vol.21 No.1
A separate and distinct interaction with both the actual e-vendor and with its IT web site interface is at the heart of online shopping. Previous research has established, accordingly, that online purchase intention is the product of customer assessments of IT itself, specifically its perceived usefulness and ease-of-use(TAM). Since perceived usefulness and perceived ease of use are such a fundamental driver of usage intentions, it is important to understand the determinants of this construct and how their influence changes over the voluntariness towards the usage intention. The reason for voluntariness as a moderating variable is that it had the serious effect to the motivating in the making willingness of the internet shopping-mall usage. A better understanding of the determinants of perceived usefulness and perceived ease of use to the usage intention would enable us to design web site interventions that would increase user acceptance and usage of internet shopping-mall. Therefore, the goal of the present research is to extend TAM to include additional key determinants of TAM and to understand how the effects of these determinants change with the voluntariness of the usage intention of the internet shopping-mall.
사진 필름상의 할로겐은 입자가 레이저광 회절 무늬에 미치는 영향에 관한 이론적 고찰
강석호,김달우 嶺南大學校 工業技術硏究所 1982 연구보고 Vol.10 No.1
It was theoretically considered whether the silver-halide grains remained on the slide film on which round or rectangular particles as particle sample were photographed affect the laser diffraction pattern intensity It is confirmed that grain size of 0.7 to 2.3㎛ on the film does not affect the pattern analysis of the particle images diffracted with laser light whose wavelength is 0.6328㎛. In theory, the distances between adjacent grains affects the pattern intensity, but this effect can be also negligible, if the distance is not shorter than 10 times of the wavelength of the laser light.
初等學校 運營에 있어서의 人間關係에 대한 考察 : 一線學校 行政家와 敎師 關係를 中心으로
李達浩 서울 敎育大學校 1978 論文集 Vol.11 No.-
To devise the democratic and effective management of primary school these should be desirable human relations between school master and teachers or among the teachers. Desirable human relations in the school means independent and autonomous cooperative system. I hereby suggest 5 conditions to form an ideal human relations between school master and teachers. 1. School master should endeavor set up the democratic administrative system. 2. School master should advise teachers not as an inspector but an adviser, and should consider to have chances to speak one another naturally. 3. School master should give them the appropriate duty according to their abilty. 4. Teachers should try to fulfil their duty faithfully 5. Teachers should throw away their selfimportance and egotism and have the cooperative and apprehensive spirit to establish the amicable harmony.
손달호 한국경영과학회 1998 韓國經營科學會誌 Vol.23 No.3
Despite the adoption of advanced computer technologies by organizational makers, the actual use of E-mail by managers and professionals has tended to be lagging and the potential benefits of these technologies have not been fully realized. Much of the prior research in this area has focused on the utility or perceived usefulness of E-mail as the principal motivating factor in using them. Relatively little attention has been given to the recreational basis of E-mail usage. The limited research in this area indicates the use of E-mail can be stimulated by the intrinsic joy and enjoyment derived. The objective of this study is to integrate these perspectives on the reasons underlying the use of E-mail and to examine simultaneously the relative influence of motivators identified in the literature as affecting individuals' decision to use E-mail. The study focuses specifically on E-mail because of its ubiquitous usage.