• Journal of the Korean Society for information Management
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• v.5 no.1
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• pp.104-130
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• 1988

The purpose of this study is to grasp the research activities of Korean statisticians and scientific properties of statistics field guantitatively by analyzing its literature with various bibliometric research methods. In this study the productivity of authors arid cited literatures were analyzed.

• Journal of Information Management
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• v.40 no.4
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• pp.135-150
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• 2009

Existing bibliometric laws have been established on the basis of well defined science journals with a long history. However, the history of technology innovation research in Korea is young and the scope of the research is diverse compared with other fields. The main purpose of this research can be summarized as follows : Can the traditional bibliometric laws be used to explain the young and diverse data derived from technology innovation studies in Korea. Second, we want to compare the explain ability of the power law, compared with the traditional laws in the field. Third, we propose a quasi index related to the well-known impact factor to measure the contribution of a journal or a group of journals to the development of innovation research in Korea. We confirmed Lotka's and Bradford's laws which are used to measure the productivity of researchers, but we could not support the validity of Price's Square Root law as Nicholls (1998) could not. On the citations to journals, Garfield's laws is not observed. However, the power law fits well the citations to author, journal, article, and book. The estimated parameters between 1.6 and 3.5 are similar to the values in the range of 1.5 and 3 in previous studies. Finally the quasi index shows that the influence of international leading journals on innovation research in Korea is weaker than on innovation studies in the world.

• Journal of Korean Library and Information Science Society
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• v.39 no.4
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• pp.377-395
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• 2008

This article aims to help decide until when a library has to hold journal volumes for user efficiency by measuring the value of academic journals to find the frequency of journal use over the elapsed time based on the half-life index-number of literature obsolescence by Burton & Kebler. Four general subjects categories in science was analyzed. (4 detailed subjects in mathematics, 12 in physics, 12 in chemistry, 14 in technology was selected.) As a result, citation ages are $20{\sim}29$ years in mathematics, $8{\sim}11$ in physics, chemistry, and technology. Average half-life indexes are 11.22 year in mathematics, 7.5 in physics, 8.4 in chemistry, and 8.88 in technology.

• Journal of the Korean Society for Library and Information Science
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• v.19
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• pp.243-261
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• 1990

계량서지학이 도서관 정보학 분야에 응용된 지 20년이 지난 지금, 이론 및 실무에 남긴 발전적 기여를 고찰함과 동시에, 컴퓨터를 비롯한 정보기술의 발달로 계량서지학의 가치와 중요성은 한층 더 폭넓게 인지되고 있다. 본 연구는 계량서지학의 개념 정리와 그 특성을 분석함으로써 다양한 이론적 근거 및 장$\cdot$단점을 파악하여 향후 연구방향 설정에 기초를 제시함을 그 목적으로 한다. 문헌구조를 분석하는 군집분석(cluster analysis), 동시인용분석(co-citation analysis), 인용문맥분석 (citation context analysis), 다차원축적기법(multidimensional scaling technique) 등에 대한 최근의 연구 동향 및 추이를 분석함으로써 도서관 실무 혹은 정보시스팀에 계량서지학의 실제 응용을 제시하였다. 아울러, 계량서지학의 3대법칙-Lotka's law, Brandford's law, Zipf's law-의 발달 단계, 상관관계 및 응용분야를 연구함으로써 전반적인 도서관 관리와 이론정보학의 연구방향을 설정하고 있다.

• Journal of Information Management
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• v.24 no.4
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• pp.24-42
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• 1993

This study examines the obsolescence of library and information science literature published in Korea, analysing citations appeared in major periodicals of 1992. Periodicals, languages, and forms of cited literatures are analyzed to find the half-life and the annual aging factors of Korean library and information science literature and then synthesized.

• Proceedings of the Korean Statistical Society Conference
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• 2000.11a
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• pp.1-4
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• 2000

상위 $20\%$의 우량고객이 기업수익의 $80\%$를 기여한다는 파레토 법칙을 인용하지 않더라도 고객이 원하는 상품과 서비스를 지속적으로 제공함으로써 고객과의 지속적인 관계를 통한 고객과의 지속적인 관계유지, 특히 우량고객의 확보, 유지는 기업의 수익증대에 깊은 관계가 있으며 결국 기업의 생존을 가늠하는 길이 될 것이다. 최근에는 금융권간 업무영역이 무너지면서 모든 금융기관들은 우수고객 확보를 위해 영업력을 집중시키고 있다. 특히 수익기여도가 높은 우수고객에 대해서는 차별적인 우대서비스를 명시적으로 규정하고 우량고객 확보를 위한 생존을 건 경쟁이 벌어지고 있다. 따라서 우량고객은 자료를 통한 객관적이고 합리적 기준에 의해 확보되어야 한다. 본 연구에서는 이에 대한 방법론으로서 데이터베이스 모델링을 제시하며, 그 효과를 측정하도록 하고, 고객 속성에 따른 고객세분화에 이용될 수 있음을 보여준다.

• Proceedings of the Korea Water Resources Association Conference
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• 2006.05a
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• pp.1605-1610
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• 2006

계단식 Gabion 낙차공은 다공체 구조물로서 시공하기 쉽고 안정적이며, 하천유수에 대하여 저항성이 있어 하천구조물로서 널리 자주 사용되고 있다. Gabion은 다공체로서 유수력을 쉽게 흡수함으로써 감세지 계단표면의 위치에너지를 소산시키는데 매우 효과적이다. Stephenson은 1/10 축적을 가진(투수성이 있고 하천낙차공에만 적용되는 투수성 상류면을 가진 높이 4m까지의) 계단식 Gabion을 월류 실험한 바가 있으며, 그 연구결과가 실무에서 인용되고 있다. 그러나 본 연구에서는 급변류의 에너지 소산효과를 조사하기 위하여 중력이 다른 힘들보다 지배적이므로 Froude 상사법칙을 이용하고 1/1, 1/2, 1/3 경사를 가진 계단을 적용하였다. 실험에서는 경사를 가진 높이 4m 계단식 위어와 게비온 감세지 실험, 계단모형실험(보통구조, 층상구조, 끝단이 올라간 구조, 턱을 가진 구조), 격리수맥흐름, 부분수맥흐름으로 제안하여 경사에 따른 급변류의 에너지 소산효과에 대한 결과를 얻을 수 있었다.

• Journal of the Korean association of regional geographers
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• v.1 no.1
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• pp.1-21
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• 1995

We Korean geographers have been interesting merely in research trends and models which induced in more advanced societies. We unconcerned with the models were painfully acquired through many field surveys and accumulated researches. Approaches to the generalization without accumulating experienced studies are just like 'building on the sand' and 'it is nothing but the paper'. We still need many field surveys, regional approaches and very basic researches for induced the Korean geographic models. In geography. 'where' is not main goal. 'Why and how' are the most important. We know these very much. But we do not recognize that 'what is where' in Korea, still now. We must have our own Korean spatial models. But geography is not build in a day and in one generation. It needs interdisciplinary or system approaches accompany with the other fields of sciences. We concern with the spatial principles and laws which were hidden by the complicated phenomena in real world.

• Journal of the Korea institute for structural maintenance and inspection
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• v.25 no.1
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• pp.59-66
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• 2021

The earthquakes are the natural disasters that can cause the most serious damage to civil structures. Therefore, various studies are being conducted to secure the safety of structures against earthquakes. Most studies on the safety or mechanism of civil structures during earthquakes are being conducted based on lab scale test, because real structure tests are impossible when considering the scale of civil structures. The scaling factor proposed by Iai is mainly cited, but when applying the scaling factor proposed by Iai, there are many difficulties in selecting the structural members necessary for the production of the lab scale model. This is because when applying the scaling factor proposed by Iai, the scaling factor must be applied to the elastic modulus, which is the material property of the structure. Therefore, a new method based on Iai's 's similarity law for determining scale factor is applied in this study where the material property of real structure is same as that of lab-scale model. Through the results of this study, it is considered that the characteristics of the structure calculated through the lab scale model test can more accurately reflect the characteristics of the real structure.

• The Mathematical Education
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• v.56 no.3
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• pp.281-300
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• 2017

This study analyzed the difficulties of middle school students in computer simulation of the law of large numbers through eye movement analysis. Some students did not attend to the simulation results and could not make meaningful inferences. It is observed that students keep the existing concept even though they observe the simulation results which are inconsistent with the misconceptions they have. Since probabilistic intuition influence student's thinking very strongly, it is necessary to design a task that allows students to clearly recognize the difference between their erroneous intuitions and simulation results. In addition, we could confirm through eye movements analysis that students could not make meaningful observations and inferences if too much reasoning was needed even though the simulation included a rich context. It is necessary to use visual representations such as graphs to provide immediate feedback to students, to encourage students to attend to the results in a certain intentional way to discover the underlying mathematical structure rather than simply presenting experimental data. Some students focused their attention on the visually salient feature of the experimental results and have made incorrect conclusion. The simulation should be designed so that the patterns of the experimental results that the student must discover are not visually distorted and allow the students to perform a sufficient number of simulations. Based on the results of this study, we suggested that cumulative relative frequency graph showing multiple results at the same time, and the term 'generally tends to get closer' should be used in learning of the law of large numbers. In addition, it was confirmed that eye-tracking method is a useful tool for analyzing interaction in technology-based probabilistic learning.