• Journal of the Korean Society for Library and Information Science
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• v.20
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• pp.223-270
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• 1991

To give any science or discipline an assured status, the most important and fundamental thing is to establish the method of research. 'Bibliography' is an ambiguous and much-abused term in any area, oriental, anglo-american, or latin countries. This study is a little essay to examine the different theories of these three areas and to synthesize the common factors. It is devised three parts : the definition of the term itself and the transition of its concept, the introduction of each theory, and a proposition of methodology based on these theories. In all, bibliography is commonly understood to mean (i) a list of books and other graphic materials arranged according to some system, (ii) the study of books as material objects include historical and textual problems, (iii) as a science of books, the systematic study of all conditions of its production, diffusion, and utilisation, including the study of factors of explication of phenomenon, on the political, economical, technical, social and culturel plans.

• Journal of Korean Society for Quality Management
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• v.33 no.3
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• pp.91-104
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• 2005

Tolerance analysis plays an important role in design and manufacturing stages for reducing manufacturing cost by improving producibility. In most production processes encountered in practice, a process mean may shift or drift in the long run although process is in control. This study discusses the feasibility of three most common inflation factors(Bender, Gilson and Six Sigma) as a correction to Root Sum of Squares(RSS) method to compensate heuristically for a shift of process mean and nonnormal component distributions from simulation experiments and proposes the guidelines for choosing the inflation factor.

• Journal of Technology Innovation
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• v.15 no.1
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• pp.65-86
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• 2007

The purpose of the current study is to suggest a reliable starting point for roadmapping to overcome two common shortcomings of previous literatures that they do not demonstrate a robust methodology for roadmap and they describe the roadmapping process in the abstract. The proposed methodology for roadmapping considers four important business- and market-related factors: consumer requirements, engineering characteristics, the gap between the roadmapped technology and competing technologies, and future changes in consumer preferences. We capture consumer preferences using conjoint analysis and interconnect the above four factors using QFD (Quality Function Deployment). The model is applied to power line communications (PLC). The results show that there is a significant difference between priorities assigned to the engineering characteristics by expert alone and priorities determined by the roadmapping model.

• Journal of Korean Physical Therapy Science
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• v.6 no.4
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• pp.153-165
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• 1999

The transcranial Doppler(TCD) is a technique for measuring blood flow velocity of intracranial and extarcranial arteries. This examination based on Doppler effect which was first formulated in 1842 by the Austrian physicist Christian Doppler. In 1982, Rune Aaslid first maked 2MHz pulsed probe and recording intracranial vessels with transcranially. There are six criteria utilized in gaining positive identification of the intracranial vessels. The six criteria are as follows l)acoustical windows 2)depth of sample volume 3)direction of flow 4)spatial relationship of ACA and MCA bifurcation 5)mean velocity and 6)response common carotid artery compression and/or oscillation test. The affected factors for TCD examination are angle of insonation, posture of subject, age, gender, hematocrit, metabolic factors, and cardiac output. Clinical application of TCD are detection of stenosis, occlusion, emboli, thrombsis in intracranial and extracranial arteries and evaluation of cerebral arterovenous malformation, collateral capacity in the circle of Willis, ischemia cerebrovascular disease, stroke patient and vertebrobasilar system.

• Journal of Korean Traditional Oncology
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• v.12 no.1
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• pp.25-35
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• 2007

There are very necessary for three factors, that is sun(oxygen), temperature, nutritions to maintain life. when sun shines, skin temperature get up. after man eat food, core body temperature get higher. temperature is temperature. therefore, common characteristic of three factors is temperature. temperature is energy and qi(氣) in korean medicine. in addition to this one, pyretomedicine also insists that the key point of all disease development mechanism is also the overenough and poor of energy. In this aspects, writer submit this thesis about all disease development, neoplasia devolpment and metastasis as hypothesis.

• Journal of Powder Materials
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• v.5 no.4
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• pp.299-302
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• 1998

Dimensional accuracy is one of the most important issues in the production of sintered parts. The iron-copper-carbon system is commonly used alloys in sintered structural parts production. The dimensional control of these alloys, however, is not easy because of their complex sintering behavior. This study is an effort to clarify the influence of common factors on dimensional change of Fe-Cu-C sintered structural parts. We determined the effect of such various parameters as chemical composition, particle diameter, compact density, sintering temperature and sintering time on dimensional changes. Consequently, we obtained a useful formula to predict the final dimension in function of these parameters. The effect of typical impurities in copper powder on the dimensional change of sintered parts has also been described.

• The Korean Journal of Pain
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• v.21 no.1
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• pp.71-73
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• 2008

Herpes zoster in childhood is uncommon, but it is more common in association with immunosuppression. Maternal varicella infection during pregnancy and varicella occurring in the newborn represent risk for childhood herpes zoster. However, some controversies persist on risk factors, diagnosis, and the natural history of childhood disease. We report a 10-year-old healthy boy with shingles and review the risk factors, prognosis, and treatment of pediatric zoster.

• Clinical and Experimental Pediatrics
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• v.59 no.11
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• pp.432-439
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• 2016

Asthma is recognized as a complex disease resulting from interactions between multiple genetic and environmental factors. Accumulating evidence suggests that respiratory viral infections in early life constitute a major environmental risk factor for the development of childhood asthma. Respiratory viral infections have also been recognized as the most common cause of asthma exacerbation. The advent of molecular diagnostics to detect respiratory viruses has provided new insights into the role of human rhinovirus (HRV) infections in the pathogenesis of asthma. However, it is still unclear whether HRV infections cause asthma or if wheezing with HRV infection is simply a predictor of childhood asthma. Recent clinical and experimental studies have identified plausible pathways by which HRV infection could cause asthma, particularly in a susceptible host, and exacerbate disease. Airway epithelial cells, the primary site of infection and replication of HRV, play a key role in these processes. Details regarding the role of genetic factors, including ORMDL3, are beginning to emerge. This review discusses recent clinical and experimental evidence for the role of HRV infection in the development and exacerbation of childhood asthma and the potential underlying mechanisms that have been proposed.

• Proceedings of the Technology Innovation Conference
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• 2001.06a
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• pp.175-194
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• 2001

Recently, with the advent of knowledge-based economy and techno-economic paradigm social demands for technology valuation have increased. In nature, however, technology valuation is an intractable task since technology is characterized by intangible and tacit factors and is traded in a suppliers market. Consequently, it is quite common that each individual or organization has ie own valuation method or criterion. The main objective of this research is to propose a new technology valuation method which is easy to understand and apply. In addition, the method is designed to generate monetary value, rather than score or rank, of technology. To this end. we have proposed the overall framework and detailed procedure of a new valuation method. In doing that, we have emphasized the following factors. First, the new method. vis-a-vis existing methods, is applicable to high-tech areas, rather than traditional manufacturing sectors. Second. the proposed method analyzes the structural relationship between market value(value of market) and technology value(value of technology) and integrates them into valuation process. Third, the new method takes idiosyncratic characteristics of various industrial(technical) sectors into account.

• International Journal of Control, Automation, and Systems
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• v.4 no.1
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• pp.105-112
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• 2006

The main function of a reactor protection system is to maintain the reactor core integrity and the reactor coolant system pressure boundary. Generally, the reactor protection system adopts the 2-out-of-m redundant architecture to assure a reliable operation. This paper describes the safety assessment of a digital reactor protection system using the fault tree analysis technique. The fault tree technique can be expressed in terms of combinations of the basic event failures such as the random hardware failures, common cause failures, operator errors, and the fault tolerance mechanisms implemented in the reactor protection system. In this paper, a prediction method of the hardware failure rate is suggested for a digital reactor protection system, and applied to the reactor protection system being developed in Korea to identify design weak points from a safety point of view.