• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2016년도 학술발표회
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• pp.194-194
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• 2016

Gansu, located in the northwestern region, is a typical agricultural province of arid, semiarid in China. The shortage of water resources is the biggest obstacle of Gansu Province's development, and the dry farming water-saving is the eternal theme of Gansu agricultural sustainable development. In recent years, intensify reform in Gansu, has walked out a successful way in the agricultural water-saving. Using the integrated river basin governance as opportunity, the total water-using quantity was regarded as rigidity to retrain, distributed to counties (districts), irrigated areas, towns, associations, groups step by step. Agricultural water price was substantially increased, with the surface water price from about $0.1RMB/m^3$ to more than $0.2 RMB/m^3$, and the ground water from zero to more than $0.1RMB/m^3$. Simultaneously, the difference water prices and over-quota water progression price markup were carried out. The transaction of water rights was encouraged to impel the peasant to establish the consciousness of saving-water. The regulatory documents were formulated to standardize the scope, condition, mode, program etc. of agriculture water-rights transaction, to guarantees the transaction of water rights is carries out in order. The pattern of farming was optimized and adjusted, reducing the high water-consumption crop, increasing economic crops with high benefit and low water-consumption, developing industrialized agricultures such as green house. The relative engineering and measuring facility were comprehensively improved, with the anti-seepage of canal system and the enforcement of dynamo-electric well, developing high-efficient water-saving irrigation and overall metering facilities. The water fine-grained management has realized, and obvious water-saving effect has obtained: water-using rate in the irrigation area by river water has brought up to 0.57 from 0.52, and by well water up to 0.84 from 0.76. Although the water price has increased, the proportion that the water rate expenditure accounted for the cost lasts decline, and the farmers' income has gone up. The peasants express, the used water is few, and it is few to till land, but the income is many, and life is better.

• 한국주거학회논문집
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• 제26권2호
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• pp.103-110
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• 2015

Precast Concrete (PC) construction method can be the one that is suitable for long-life housing due to its merit in respect of maintenance and durability based on crack-free from mass production with indirect construction cost-saving-effect due to shortening construction period comparing to the conventional construction method, but it has the problem that causes the raise of direction construction costs. So, this study analyzed its economic feasibility of PC method whose maintenance and durability are excellent for underground parking lot of apartment house for accomplishing cost-saving long-life housing by applying the various structural system. In evaluation of unit module structural system, two-way PC system requires 10 to 28% more costs for frame work than RC rigid frames, and, one-way PC system 98~112%. Although it varies depending on the method, the costs are similar to RC rigid frame structure, provided a proper method is adopted. Also, Model 11, which was most economical in the evaluation, was applied to an real parking lot and about 2 to 6% of construction costs was reduced than RC rigid frames. This seems to be because, although PC system has a higher production cost, introduction of P.S (prestress) reduces member depth and, therefore, height, as well as the number of members per unit module.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2005년도 추계학술대회 논문집
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• pp.243-248
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• 2005

As environmental Problems are increasing, many attempts to solve problems and preserve environment are appearing around the world. Not only in construction, but also dwelling life, residents attend many activities to improve environmental problems. Ecological development example of Freiburg in Germany was focused in this study to show the direction of development of environmental friendly housing complex in Korea. The target of study is Vauban Housing Complex of Freiburg in Germany. The study methods are literature study and field trip. Contents of the study include 1) formation process of the complex 2) physical environment of the complex 3) environmental friendly factors of the complex 4) environmental friendly life style of the residents, etc. Result of this study is as follows. Vauban Housing Complex was remodeled from the existed army buildings by residents themselves through education and negotiations. Residents' life satisfaction and housing adaptation level were high on the whole. The principle of the complex formation was use of natural feature itself in maximum against developing in minimum. For instance, construction materials, energy saving, resources saving were planned and used carefully. The residents led community successfully according to environmental friendly life principles. In conclusion, the persistent study on environmental components is necessary that is suitable to Korean situation.

• 연구논문집
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• 통권27호
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• pp.47-55
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• 1997

Fatigue life prediction of mechanical components is necessary to develop new products, which is very expensive and time-consuming. This paper reviews technologies proposed for computation of dynamic stress in mechanical components. The methods based on multibody dynamics are considering more real operational conditions than other methods. The technology for fatigue life prediction without the prototype for experiment results in cost and time saving. This technology can be applied to design of various mechanical components like carbody.

• 한국재난정보학회 논문집
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• 제6권1호
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• pp.62-76
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• 2010

Constructions of skyscrapers have been planned and are being performed in Korea, but the research on disaster preparedness and response is mainly focused on construction safety, fire prevention and response, and legal enforcement. So research on physical and psychological effect on human residents, methodology of increased survival rate and decreased disability rate is insufficient. Authors intended to identify the characteristics of skyscraper on human health and safety in disaster, to examine the basic influence of skyscraper on physical and psychological health and the way to decrease the negative effect on human survival.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1992년도 하계학술대회 논문집 B
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• pp.1203-1205
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• 1992

Due to poor energy resources, the importance of energy saving has been greatly emphasized. It can be one method of energy saving to reduce the power. The AC adjustable speed drive systems show excellent efficiency, which have been developed in recent years. The adjustable speed drive system improves the efficiency in lightly load condition and extend the life span of motor by limiting the over-current at starting. The main topic of study is the results of energy saving and emergency transfer.

• 가정과삶의질연구
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• 제15권3호
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• pp.59-72
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• 1997

The purpose of this study is to investigate housewife's housework time and the expenditure for time-saving goods and service at the lifecycle stage and to identify the relationship between demographic characteristics and these two variables. The data is collected by using questionnare distributed to 412 housewives living in Seoul and around new two cities. The data is analyzed using Mean Frequency Percentile One-way ANOVA Pearson's Correlation and Regression,l The result of this research is as follows; 1. Housewife's housework time has significant relationship with the lifecycle stages (p<0.01) And the most influencial factor to it is housewife's employment and the next are domestic helper monthly household income and housewofe's age(p<0.01) 2. The expenditure for time-saving has most significiantly related to the lifecycle stages. And the other influencial factors to it are houswife's employment monthly household income and housewife's age(p<0.001) The explanatory power of al variables is 36%.

• 가정과삶의질연구
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• 제4권2호
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• pp.119-136
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• 1986

To survey the intensities of housewives perception on savings-goods and to suggest them some guiding direction for reasonable saving behavior, a total of 392 questionaires was distributed to housewives in Seoul. The data were analyzed in terms of frequency, percentage, x2-test, F-test and Pearson's Correlation. The Results were as follows; 1) Housewives awareness degree on savings-goods scored total average marks of 37/100 which was in the relatively low level. 2) Housewives interest degree on saving-goods scored total average marks of 70/100 which was in the fairly high level. 3) The correlation between awareness and interest degree on savings-goods was very highly significant. 4) The major information source of savings-goods was from pamphlet, TV, radio and newspaper, namely, public information. 5) Housewives perception of public information on savings-goods was very weak.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2012년도 춘계 학술논문 발표대회
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• pp.265-266
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• 2012

Recently, preparing countermeasures about energy depletion and CO₂ emission progressing rapidly is considered as an urgent problem not only in domestic country but also in international countries. Among this, the requirement for the comfort development of in door environment is increasing according to housing culture and life environment changing. Thus, it is required urgently to save building energy and develop fusion technology maintaining comfort of indoor environment. Recently, energy-saving ways in saving heating and cooling energy by latent heat and thermal storage is considered significantly. In this study, keeping up with the times, thermal performance analyzed. Also, this study has the aim to draw materials for evaluating usefulness and efficiency.

• 한국주거학회논문집
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• 제7권1호
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• pp.117-126
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• 1996

The purpose of this paper is to develop formal design principles towards flexible house plan. A flexible house plan accomodates spatial requirements corresponding to change of life style and provides a way of saving architectural materials. Design properties as a basis for manipulation of room includes adjacency, orientation and geometrical information which are suited well to flexible design. This paper has developed a formal grammar of shape which can be utilized to transform house plan. Flexible design presented here is based on the idea of various operations of the shape grammar. The shape grammar, as a set of rules, specifies manipulations of shapes for reorganization of spatial relationships of rooms in a house plan. It lists exemplary rules in control knowledge which guides design processes for modifying a plan. An example taken from house plan design is used to ilustrate important aspects of the flexible design which fundamentally provides the basis for architectural material saving.