• 한국도서관정보학회지
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• 제20권
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• pp.383-411
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• 1993

Information and information services are recently recognized as a commodity and libraries and information centers are also considered as a company. Under this circumstance, libraries and information centers encounter the problems how they can effectively achieve the objectives of service institutions and objectives of resource management as companies. Pricing policy for information services must be something to satisfy these two very different objectives. This paper discusses the following issues to develop pricing model for information services, 1) the needs of pricing for information services, 2) the major elements impacting to pricing of information services including the objectives of pricing, cost and demand of information services, and information value, 3) the pros and cons of pricing method using concepts of average cost, price differentiation, and marginal cost, respectively.

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 1995년도 춘계공동학술대회논문집; 전남대학교; 28-29 Apr. 1995
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• pp.387-394
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• 1995

With respect to the effectiveness of types of knowledge on human diagnostic performance, the results of several experiments claimed that training with diagnostic rules (procedural knowledge) is more effective than training that provides theoretical knowledge (principle knowledge). However, we usually have the idea that understanding the principles of system dynamics is necessary for diagnosis in some situations. In this study, we pointed out some problems in the previous experiments that force to reinterpret their experimental conclusions. Accordingly, we conducted an experiment to reinvestigate the value of theoretical knowledge in two problem situations. A simulator system, which is named DLD, that is to diagnose an electronic device was created for this purpose. It is a context-free digital logic circuit which includes forty-one gates of three basic types. Our experiment investigated the marginal effects of theoretical knowledge over common diagnostic rules. The experimental results showed that the effectiveness of the instruction in theoretical knowledge is dependent on the complexity of diagnostic situations. This adds up an experimental evidence against the presumed ineffectiveness of theoretical knowledge and forward reasoning in fault diagnosis. Furthermore, the result suggests the source of the use of theoretical knowledge.

• 농촌계획
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• 제1권2호
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• pp.103-121
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• 1995

This study was carried out to identify the problems and policy alternatives for the improvement of living conditions and environmentally friendly agriculture. The results of surveys on the current situations of living conditions in the rural areas revealed that the main cause of depopulation in Korean rural villages was the lack of social infrastructure and income sources. The current government policies for agriculture geared mainly for improvement of international comparative competitiveness will result in the further disadvantage against the mountainous regions with marginal agricultural lands. Therefore, it is recommended that the agricultural policy should be complemented by the environmental and social policies in the less favoured areas. This can be justified by the fact that the demand for environmental public goods such as recreational opportunities in rural settings uncontaminated by the industrial wastes is growing.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2008년도 하계종합학술대회
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• pp.377-378
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• 2008

Morphology is one of important issues when developing a layer of CVD-W. we need to control the process more precisely that is filling gaps between BL(bit line)and DC(direct contact). Whereas we are facing to difficulties like not-filling contacts due to marginal problems in deposition and etching process. This paper is for investigating a method to resolve morphology problem with strengthening the condition of seasoning.

• 대한한방내과학회지
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• 제25권3호
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• pp.596-601
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• 2004

After a gastrectomy, various forms of postgastrectomy syndrome may happen, such as dumping syndrome, reflux $^{\wedge}esophagitis$, afferent loop syndrome, marginal ulcer, anemia, etc. These can cause some problems in the quality of life for post-gastrectomy patients. This oriental medicine treatment was designed to improve digestion and relieve symptoms, correct imbalance and prevent relapse in each case. This study suggests a level of efficacy of oriental medicine(Samryungbaekchul-san, Bobi-tang) in treating postgastrectomy syndrome.

• Journal of Dairy Science and Biotechnology
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• 제33권1호
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• pp.69-73
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• 2015

The world is presently facing key challenges due to the population explosion, shortages in renewable sources of energy, and environmental problems. One important aspect of ecological intensification is the use and improvement of marginal lands and spaces often ignored, until now. Goats are known to be well adapted to scrubs, forage trees, and rangelands. Goats could contribute marginally, but significantly, to the growing demand for meat without using arable lands. Since 2000, there were 752 million goats globally, and goat livestock increased by 26.8% in 2010, accounting for 954 million heads. Goats are widespread due to their high adaptability to different environmental conditions and nutritional regimes, high productivity, and low maintenance cost. A significant growth in goat number was noticed in the period 2000~2010 in the Netherlands (+113.83%), in spite of the 9.75% decrease in EU-27. A cheese making goat farm in the Netherlands showed how it can survive in the one fifth size of the average. It may be a good model for the Korean goat industry since it uses seasonal breeding and results in reduced "goaty" flavor in the cheese.

• Journal of Electrical Engineering and Technology
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• 제10권3호
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• pp.895-904
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• 2015

This paper presents a probabilistic approach of reliability evaluation and economic assessment for solving transmission network expansion planning problems. Three methods are proposed for TNEP, which are reorganizing the existing power system focused on the buses of interest, selecting candidates using modified system operating state method with healthy, marginal and at-risk states, and finally choosing the optimal alternative using cost-optimization method. TNEP candidates can be selected based on the state reliability such as sufficient and insufficient indices, as proposed in this paper. The process of economic assessment involves the costs of construction, maintenance and operation, congestion, and outage. The case studies are carried out with modified IEEE-24 bus system and Jeju island power system expansion plan in Korea, to verify the proposed methodology.

• Restorative Dentistry and Endodontics
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• 제45권1호
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• pp.9.1-9.7
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• 2020

The restorative procedure in posterior teeth involves clinical steps related to professional skill, especially when using the incremental technique, which may fail in the long term. A recent alternative is bulk-fill resins, which can reduce polymerization shrinkage, decreasing clinical problems such as marginal leakage, secondary caries, and fracture. This scientific study aims to report a clinical case using bulk-fill resin with an occlusal matrix. As determined in the treatment plan, an acrylic resin matrix was produced to establish an improved oral and aesthetic rehabilitation of the right mandibular first molar, which presented a carious lesion with dentin involvement. The occlusal matrix is a simple technique that maintains the original dental anatomy, showing satisfactory results regarding function and aesthetic rehabilitation.

• Journal of the Korean Statistical Society
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• 제31권1호
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• pp.63-75
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• 2002

Most attempts at Bayesian analysis of neural networks involve hierarchical modeling. We believe that similar results can be obtained with simpler models that require less computational effort, as long as appropriate restrictions are placed on parameters in order to ensure propriety of posterior distributions. In particular, we adopt a model first introduced by Lee (1999) that utilizes an improper prior for all parameters. Straightforward Gibbs sampling is possible, with the exception of the bias parameters, which are embedded in nonlinear sigmoidal functions. In addition to the problems posed by nonlinearity, direct sampling from the posterior distributions of the bias parameters is compounded due to the duplication of hidden nodes, which is a source of multimodality. In this regard, we focus on sampling from the marginal posterior distribution of the bias parameters with Markov chain Monte Carlo methods that combine traditional Metropolis sampling with a slice sampler described by Neal (1997, 2001). The methods are illustrated with data examples that are largely confined to the analysis of nonparametric regression models.

• 대한가정학회지
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• 제36권7호
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• pp.13-24
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• 1998

An analysis of the changing trends of kyongjobi expenditure pattern from 1982 to 1996 and the related factors of kyongjobi expenditure of urban household in 1996 has been performed. Major findings were as follow: An average monthly expenditure was 20,036 won during the period, and the increased rate of monthly expenditure was 5.6 times in the past 15 years which was the twice as much as of the total consumption. The ratio of the total kyongjobi consumption was increased about 2 times during the period, and it was 2.96% in 1996. During the period, an average marginal consumption propensity was 0.0379, and it was dramatically increased from '93 to '94. Average income elasticity was 1.743 during the period and found out that it was luxury goods. The result of Anova and Tobit analysis showed that the level of consumption, number of earners, age and education had positive effect on kyongjobi. And in Seoul area, house owner, male(head of the household), and professionals spent more on kyongjobi than other. The present problems of custom, spending of kyongjobi, were discussed and the change of the custom was urged.