• Quality Improvement in Health Care
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• v.10 no.2
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• pp.164-175
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• 2003

Objectives: To evaluate the performance of models to predict AMI patients death using severity adjustment measures in Korea. Methods: Medical records of 861 patients treated by AMI in 7 general hospitals during 1996 and 1997 were reviewed by trained nurses. We measured the severity of patients by APACHE III, MedisGroups, CSI and DS. Using each severity method a predictive mortality for each patient was calculated from a logistic regression model including the severity score. The statistical performance of each severity method model was evaluated by using c-statistics and R2. For each hospital, z scores compared actual and expected mortality rates. Results: The overall in-hospital mortality was 14.5%, ranged from 10.0% to 22.2%. The distributions of severity scores for each method was significantly different by hospitals. The four severity-adjusted models to predict AMI patients death varied in their statistical performance for discrimination power of patients death. Order of Severity-adjusted mortality rates and z scores by four severity measures was different. Conclusion: Severity-adjusted mortality rates of AMI patients might be applied as an indicator for hospital performance evaluation in Korea. Because different severity methods frequently produce different impressions about relative hospital performance, more studies has to be done to use it as quality indicator and more attention should be paid to select appropriate severity measures.

• Journal of Oral Medicine and Pain
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• v.25 no.4
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• pp.395-402
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• 2000

The D165539 locus was investigated to collect population genetic data in the Korean population. The selected subject was unrelated 293 Korean people. DNA was extracted from the samples and PCR was performed with fluorescent primer. The amplified fragment was analysed by automated DNA sequencer and it's application software. Among the Korean population, 7 allele and 18 geneotype were observed and allele No. 9 is mostly frequent(0.2679) and then allele No. 11(0.2679), allele No. 9(0.2645). The observed heterozygosity and the expected heterozygosity is 0.7466, 0.7829 each. The polymorphism information content(PIC) is 0.7466. The power of discrimination(PD) and the mean exclusion chance(MEC) are calculated to be 0.9190 and 0.5775.

• Research in Mathematical Education
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• v.10 no.1 s.25
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• pp.55-70
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• 2006

The purpose of this study was to develop math creative problem solving test in order to identify the mathematically gifted on the basis of their math creative problem solving ability and evaluate the goodness of the test in terms of its reliability and validity of measuring creativity in math problem solving on the basis of fluency in producing valid solutions. Ten open math problems were developed requiring math thinking abilities such as intuitive insight, organization of information, inductive and deductive reasoning, generalization and application, and reflective thinking. The 10 open math test items were administered to 2,029 Grade 5 students who were recommended by their teachers as candidates for gifted education programs. Fluency, the number of valid solutions, in each problem was scored by math teachers. Their responses were analyzed by BIGSTEPTS based on Rasch's 1-parameter item-response model. The item analyses revealed that the problems were good in reliability, validity, difficulty, and discrimination power even when creativity was scored with the single criteria of fluency. This also confirmed that the open problems which are less-defined, less-structured and non-entrenched were good in measuring math creativity of the candidates for math gifted education programs. In addition, it discriminated applicants for two different gifted educational institutions and between male and female students as well.

• Journal of Life Science
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• v.13 no.5
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• pp.699-704
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• 2003

The results typed by random amplification of polymorphic DNA (RAPD) were compared with those obtained by Enterobacterial repititive intergenic consensus (ERIC) fingerprinting and ribotyping-PCR. The discriminatory power of RAPD typing was the best among the methods tested. RAPD typing with two different primers for 13 Listeria spp. reference strains produced 11 patterns each. In contrast, ERIC fingerprinting produced 9 patterns and ribotyping-PCR produced 7 patterns each. Composite of two separate RAPD (Lis 11 and primer 6) results or RAPD (Lis11)/ ribotyping-PCR differentiated all 13 Listeria spp. reference strains. Therefore, composite of 2 separate RAPD (Lis11 and primer 6) or composite of RAPD (Lis11)/ribotyping-PCR is expected the most promising approach for typing field isolated Listeria spp. strains.

• Asian-Australasian Journal of Animal Sciences
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• v.18 no.6
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• pp.762-766
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• 2005

This study was conducted to establish an individual identification system comprising of 19 microsatellite markers located on different bovine autosomes. The markers were typed on 257 animals from five cattle breeds. In total, 112 alleles were detected from the genotyping of 19 microsatellite markers. The average heterozygosities ranged from 0.292 to 0.824 and the polymorphic information content (PIC) ranged from 0.274 to 0.817 in Hanwoo. We found that there were differences in allele frequencies in Hanwoo when compared with other cattle breeds. The calculated cumulative power of discrimination (CPD) was 99.999% when nine microsatellite loci were used for analysis in the individual identification system. Also the matching probability, the probability that two unrelated animals would show the same genotypes, was estimated to be $0.44{\times}10^{-9}$. Therefore, the nine markers used in this study will be used for individual identification in two million Hanwoo individuals.

• Journal of the Korean Institute of Telematics and Electronics D
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• v.36D no.6
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• pp.97-101
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• 1999

We propose and demonstrate a novel sensor which can simultaneously measure strain and temperature. The sensor is composed of a single fiber Bragg grating and an erbium-doped fiber amplifier. Using linear variation in the amplified spontaneous emission power of an erbium-doped fiber amplifier with temperature, we determine the temperature. By subtracting the temperature effect from the Bragg wavelength shift, we determine the strain. Experiments show rms deviations of $18.2{\mu}{\varepsilon}$ and $0.7^{\circ}C$ for strain and temperature, respectively.

• The Journal of Asian Finance, Economics and Business
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• v.7 no.9
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• pp.229-239
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• 2020

This paper examines the impact of gender on access to debt finance among Vietnamese enterprises. The paper investigates data and variables retrieved from the World Bank Enterprise Survey dataset using five Probit models. The regression results suggest that there exist more unfavourable debt financing conditions for women-led firms (WLF), measured as a lower probability of having loan applications fully approved. Firm's age, working sector, and perception of access to finance as a difficulty are found to have explanatory power on the discrimination. More importantly, the perception of debt finance as a difficulty or firms' level of confidence significantly explains the variance of the dependent variable of probability of loan approval, or gender effect would be more pronounced if the firm already has a low level of confidence. The paper also contributes in testing for the gender effect on Vietnamese enterprises from different sectors and scale, unlike other prior research papers focusing on specific sectors and/or small and medium enterprises only. The findings are highly useful for Vietnamese credit institutions to set out a specific business policy to attract more WLFs and help promoting gender equality in the working environment, especially in debt financing, which is often neglected in existing regulation and policy frameworks.

• Journal of Oral Medicine and Pain
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• v.21 no.2
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• pp.317-329
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• 1996

Allelic frequency and genotype distribution of short tandem repeat(STR) F13A01 locus was analysed by polymerase chain reaction, polyacrylamide gel electrophoresis and silver staining from human genomic deoxyribonucleic acid(DNA) was extracted from 205 unrelated Korean to be applied to forensic identification and parentage testing as a database. The results were as follows : 1. 5 alleles and 11 genotypes of F13A01 locus were detected and heterozygosity value was 62.0% and the observed each alleles and allelic frequency was 3.2(0.363), 4(0.105), 5(0.063), 6(0.466), 16(0.002). 2. The allelic diversity value was 0.639 and the power of discrimination was 0.804.3. Compared with observed number of alleles and allele frequency in ethnic difference, result was appeared to be similar to that of Japanese and Asians, while was appeared to be much different to that of Blacks and Caucasians in the observed number of alleles and frequency of allele 3.2, 5, 7. From the above result of this investigation, the allelic frequency of STR F13A01 locus in the Korean was considerd to be useful for individual identification and parentage testing as a database.

• Journal of Oral Medicine and Pain
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• v.21 no.2
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• pp.243-253
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• 1996

In order to be utilized as a database in forensic identification and parentage test, allelic frequency and genotype distribution of short tandem repeat(STR) F13B locus was analysed by polymerase chain reaction in 210 Korean adults who are not related. The results were as follows. 1. 3 alleles and 56 genotypes of F13B locus were detected and heterozygosity value was 48.6% and allelic diversity value was 0.639 and the power of discrimination was 0.804. 2. The observed each alleles and allelic frequency was 8(0.069), 9(0.193), 10(0.738). In conclusion, the allelic frequency of STR F13B locus in the Korean is considered as an useful DNA allelic profile for forensic identification, but it should be used with several other STR locus to get definitive conclusion of analysis for individual identification and parentage testing.

• Human Ecology Research
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• v.53 no.1
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• pp.29-47
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• 2015

The purpose of this study is to conceptualize the definition of school readiness specific to the context of the Republic of Korea. The school readiness test can be used as basic data to enable early childhood educational institutes to determine the general readiness of preschoolers and provide support to fit individual characteristics. For this purpose, six stages of the school readiness development process were considered, that is, draft development, primary preliminary survey, primary expert verification, secondary expert verification, secondary preliminary survey, and main survey. In the main survey, tests were conducted using the school readiness final draft targeting 344 preschoolers living in Seoul and Gyeonggi-do. The item discrimination power analysis and factor analysis for the examination area and question area were also conducted. Consequently, a test tool was developed on the basic of the results obtained, consisting of 129 items in the five areas of knowledge, function, adaptation, tendency, and attitude. The knowledge area was divided into general, linguistic, and mathematical knowledge, and the function area into fine motor function, basic living ability, expressive function, and gross motor function. The adaptation area was classified into adaptation activity, separation anxiety, maladaptive behavior, and environment adaptation; the tendency area into learning tendency; others understanding, and individual tendency, and the attitude area into rule compliance and life habits.