• Communications for Statistical Applications and Methods
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• v.12 no.1
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• pp.29-38
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• 2005

In sample design, determining the weights of estimates becomes usually great influence on the result. In this article, raking methods are applied to different domain and depending on the range of the domain and sample size, the results of estimates are explained and compared. For the comparison, we use the MSE, MAE, MSPE and MAPE with Actual State of Minor Enterprisers Human Resources Survey data in 2001. The simulation result shows that more elaborate method is superior to the widely used method as expected but the difference is not quite significant.

• Communications for Statistical Applications and Methods
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• v.23 no.1
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• pp.47-55
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• 2016

Stratified cluster sampling has been widely used for effective parameter estimations due to reductions in time and cost. The probability proportional to size (PPS) sampling method is used when the number of cluster element are significantly different. However, simple random sampling (SRS) is commonly used for simplicity if the number of cluster elements are almost the same. Also it is known that the ratio estimator produces a good performance when the total number of population elements is known. However, the two stage cluster estimator should be used if the total number of elements in population is neither known nor accurate. In this study we suggest a composite estimator by combining the ratio estimator and the two stage cluster estimator to obtain a better estimate under a certain population circumstance. Simulation studies are conducted to compare the superiority of the suggested estimator with two other estimators.

• Korean Management Science Review
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• v.7 no.2
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• pp.58-76
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• 1990

Flexibility, in the context of manufacturing, refers to an ability to accommodate changes in market requirements in terms of product, process, and other services in a timely manner at a reasonable cost. The basic purpose of this paper is to analyze manufacturing strategies of leading Korean manufacturers in order to answer the following questions : How important are manufacturing flexibilities to Korean companies in restoring their once competitive cost-based strategies and adopting new variety-based strategies\ulcorner How effectively are Korean companies competing with their foreign competitors, like the US and European companies in terms of manufacturing flexibilities\ulcorner And in order to improve the flexibilities what kinds of manufacturing capabilities are considered as important key factors by Korean manufacturers and are their action programs effectively implemented to acquire these capabilities\ulcorner Major findings of the analysis indicate that Korean companies are very eager to reorganize their high-volume, cost-based corporate strategies as low volume, variety-based strategies. However, Korean manufacturers are still much dependent on the large size high volume factories and / or 'focus factories'. And the action programs and technologies to improve manufacturing flexibilities have been actively implemented at a higher rate than those of their foreign counterparts.

• Proceedings of the Korea Concrete Institute Conference
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• 2010.05a
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• pp.279-280
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• 2010

The code of elongation, a key factor, which has an influence on the ductility of reinforced concrete structures is different depending on each country. That is because the gauge length determining elongation differs at every codes. According to our study, we have compared the domestic and foreign codes which show different gauge length, and it has been analyzed and evaluated to recognize which code of elongation is more rigorous through tensile test.

• Communications for Statistical Applications and Methods
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• v.16 no.2
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• pp.317-323
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• 2009

Recently not even government polices but small town decisions are based on the survey data/information, so the most of government agencies/organizations demand various sample surveys in each fields for more detail information. However in conducting the sample survey, nonresponse problem rises very often and it becomes a major issue on judging the accuracy of survey. For that matters, one solution ran be using the administration data. However unfortunately most of administration data are restricted to the common users. The other solution can be the imputation. Therefore several method, of imputation are studied in various fields. In this study, in stead of the simple regression imputation method which is commonly used, factor score regression method is applied specially to the incomplete data which have the unit and item misting values in survey data. Here for simulation study, Consumer Expenditure Surveys in Korea are used.

• International Commerce and Information Review
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• v.12 no.4
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• pp.327-344
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• 2010

This study intends to analyze the trade competitiveness of Korean films in international markets. Under environmental of film industry, Korean films could be doing better. But the Key success factors Korean films in the foreign markets are the improvement of contents Quality and the diversification of trade market. Namely, Our films is mainly exporting Japanese market and the import depends upon American films. In case the trade specialization index(TSI), The international competitiveness of Korean films shows lower import specialization, by virtue of export increasing of Japan, Europe and other markets in 2000's. On the other hand, The Export Market Share has shown similar pattern to main markets except Japanese market, and the import was almost similar to trend in foreign markets except American films. Consequently the present film strategies and polices that delight limited markets will not be compete in global markets, Korean films or contents is merely called by that name.

• The Korean Journal of Applied Statistics
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• v.26 no.1
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• pp.71-79
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• 2013

Semiparametric and nonparametric small area estimations have been studied to overcome a large variance due to a small sample size allocated in a small area. In this study, we investigate semiparametric and nonparametric mixed effect small area estimators using penalized spline and kernel smoothing methods respectively and compare their performances using labor statistics.

• Journal of Physiology & Pathology in Korean Medicine
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• v.24 no.6
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• pp.1068-1076
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• 2010

This study was to establish and evaluate international educational program for foreign traditional medicine students with traditional Korean medicine in School of Korean Medicine, Pusan National University, and discussed prerequisite requirements for international educational program. The Introduction to Traditional Korean Medicine (TKM) was constructed with Korea and TKM, Understanding TKM, Future of TKM, Clinical Skills (lecture and practice), Clinical practice (observation), Field trip, and others. The overall assessment was concluded as excellent (91.7%). The prerequisite requirements for planning and operating educational program, and key points for the success of international program were discussed. And the necessity of Center for International Educational of Traditional Medicine was described. This study can be used as a reference manual for globalization of TKM education and proposal for making policy on TKM.

• Journal of the Korea Safety Management & Science
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• v.12 no.3
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• pp.223-230
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• 2010

Recently Korean enterprises that branch out into China have been continuously increased to achieve diverse objectives such as personnel expenses reduction, market share extension on China and globalization strategy implementation. We have studied about competitiveness reinforcement of enterprises that branch out into China in terms of TPM(Total Production Management). In this paper, we extended the concept of traditional TPM(Total Productive Maintenance) to TPM(Total Production Management) that covers extensively the concept of total management innovation activities. We explored detailed activities of TPM and voluntarily participative field research circle. Also, We suggested some prerequisite conditions for TPM settlement that might be recommended for the foreign companies in China and checked Key Performance Indicator(KPI) that could be useful to confirm how TPM contributed to enterprise competitiveness reinforcement.

• Journal of Microbiology
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• v.45 no.4
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• pp.297-304
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• 2007

The detection of virulence factors of Aeromonas is a key component in determining potential pathogenicity because these factors act multifunctionally and multifactorially. In this study water samples were collected from a trout farm on a seasonal basis, and diseased fish and Aeromonas species were isolated and identified. For rapid detection of six virulence factors of isolated Aeromonas, a hexaplex-polymerase chain reaction (hexaplex-PCR) assay was used. The detected virulence factors include aerolysin (aer), GCAT (gcat), serine protease (ser), nuclease (nuc) lipase (lip) and lateral flagella (laf). The dominant strain found in our isolates was Aeromonas sobria, and the dominant virulence factors were aer and nuc for all seasons. We confirmed that A. sobria and two of the virulence genes (aer and nuc) are related. We proposed a method by which one can identify the major strains of Aeromonas: A. hydrophila, A. sobria, A. caviae, and A. veronii, using hexaplex-PCR.