• The Korean Journal of Zoology
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• v.29 no.4
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• pp.272-282
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• 1986

Univariate and multivariate analyses of morphometric characters were performed with samples of three subspecies of striped field mice (Apodemus agrarius coreae, A. agrarius pallescens, and A. agrarius chejuensis). It was found that the samples of A. agrarius chejuensis from Jeju-Do were distintc from those of the other two subspecies from the Korean peninsular, whereas subspecies coreae was similar to subspecies pallescens: it is concluded that A. agrarius pallescens is a synonym of A. agrarius coreae. Further analyses will be needed to clearify the subspecific status of A. agrarius chejuensis.

• Asian Journal of Turfgrass Science
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• v.22 no.1
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• pp.13-24
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• 2008

This study was carried out to provide basic information for the breeding of zoysiagrass synthetic varieties. For estimation of flowering periods, genetic characteristics, and cross-pollination rate, 5 combinations of zoysiagrass breeding lines were compared. Days to stigma emergence and anther exertion were observed in the field to calculate overlapping dates for cross-fertilization. Harvested seed from cross breeding combinations were planted to compare genetic characteristics using morphological traits of progenies. These data were used for determination of 7 phenotypic inheritance types with 8 morphological traits. Cross-pollination rates in 3 combinations of zoysiagrasses were estimated by using lower part color of grass shoots. Cross-pollination rates of zoysiagrass ranged from 11.3$\sim$48.9%, which indicated that zoysiagrass is an allogamous plant. When zoysiagrass breeding lines are properly combined, they may result in valuable synthetic cultivars.

• Animal Systematics, Evolution and Diversity
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• v.8 no.2
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• pp.231-242
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• 1992

Samples of two species of genus Ratts(black rat, Rattus rasttus Linnaeus; common rat, Rattus norvegicus Berkenhaut) in Korea were trapped and their 31 morphometric charcters were analyzed statistically in order to determine the range of geographic variation within each species and the interspecific differences. In addition, chromosomal G-bands and C-bands were compared and the fragment patterns of mtDNA resulted from the digestion with restriction enzymes were also analyzed. Samples of black rats from six localities in Korea were similar with one another in their morphometric characters: in head and body length, length of tail vertebrae, conventional karyotype and C-bands, they are comparable to Rattus rattus tanezumi in Japan. Specimens of common rats from seven localities in Korea were similar with one another in their morphometric characters: in conventional karyotype, they are comparable to Rattus norvegicus caraco in eastern Asia. Common rats differ from black rats in their morphometric characteris, chromosomal karyotypes and mtDNA. It is confirmed that correct species name of black rat in Korea is Rattus rattus tanezumi Tempminck: species name of common rat in Korea is Rattus norvegicus caraco Pallas: the common rat is a species, which is distinct from the black rat.

• Journal of the Korean Institute of Navigation
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• v.24 no.3
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• pp.177-193
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• 2000

우리나라 정기선사는 1970년대 이후 경쟁선사와 다양한 형태의 전략적 제휴를 통하여 꾸준히 성장하여 왔으며 오늘날 세계 정기선시장에서 경쟁우위를 확보하게 되었다. 따라서 우리나라 정기선사의 전략적 제휴에 관한 연구는 제휴전략에 관한 이론을 더욱 더 발전시키는데 도움을 줄 것으로 기대된다. 이에 따라 본 논문은 정기선사의 경영전략과 전략적 제휴의 역할에 관하여 연구하고자 하며, 다음의 세 가지 연구 질문을 통하여 분석하였다. 첫째, 정기선사의 제휴동기는 무엇인가\ulcorner 둘째, 제휴형태에 따라 제휴동기에 차이점이 있는가\ulcorner 셋째, 정기선사의 경영전략이 제휴형태의 선택에 영향을 미치는가\ulcorner 자료수집 방법은 전략적 제휴의 경험이 있는 해운선사를 대상으로 설문조사를 실시했으며, 각 선사의 제휴 의사결정에 참여하는 담당자와 인터뷰를 통하여 연구목적과 관련된 자료를 수집하였다. 자료분석의 결과, 우리나라 정기선사는 여러 가지 동기에 의하여 제휴를 선택하고, 제휴형태에 따라 각 동기의 중요도에 차이가 있음을 나타내고 있다. 또한, 정기선사의 경영전략이 제휴형태의 선택에 영향을 미치는 것으로 나타났다. 한편 본 논문은 경영전략에 따른 정기선사의 올바른 제휴형태 선택에 도움을 주는 의사결정 모델을 제시하고 있다.

• Proceedings of the Korea Society of Poultry Science Conference
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• 2003.11a
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• pp.131-132
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• 2003

Common finch is a kind of ornamental birds and could not distinguish male and female birds. For sex discrimination of Common finch, we investigated 400 birds of Common finch using the anatomical differences of Pars intermandibularis and traditional methods that currently used at the farms. Both methods have the sex determination accuracy of 48.82 and 46.0 ％ that the anatomical difference method seems little higher results than the traditional methods. More researches is needed for improving the sex determination accuracy.

• Journal of Plant Biology
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• v.35 no.4
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• pp.385-392
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• 1992

여뀌속 Tovara절 식물은 매우 복잡한 양상의 형태변이를 나타내기 때문에 각 분류군의 한계 및 위치 성정, 계통적 유연관계 해석에 있어 많은 혼란이 나타나고 있다. 따라서 본 연구에서는 본 절 분류군에서 나타나는 형태 변이의 양상을 수리분류학적으로 분석하여, 각 분류군의 한계를 명확히 설정하고 그 분류학적 타당성을 검토하고자 하였다. 본 절 분류군의 주요 식별형질에 대한 주성분 분석을 수행한 결과, 본 절은 형태적으로 크게 P. virginianum, P. filiforme, P. neofiliforme의 3분류군으로 구분되며, 이들은 주로 잎의 형태에 의해 식별되는 것으로 밝혀졌다. 또한 P. virginianum var. glaberrimum은 그 분류학적 타당성이 없는 것으로 나타났으며, Tovara (=Polygonum) virginiana var. kachina는 형태적으로 볼 때 P. neofiliforme의 변종으로 취급하는 것이 타당한 것으로 판명되었다. Polygonum virginianum, P. filiforme, P. neofiliforme는 그 flavonoid 조성에 있어서도 명확한 차이를 나타내며, 이러한 결과를 종합해 볼 때 이들은 각각 독립된 종으로 인식하는 것이 타당한 것으로 판단된다.

• Korean Journal of Ichthyology
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• v.2 no.1
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• pp.77-87
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• 1990

The development of eggs and larvae, and minute tubercles on the skin surface of the larvae in Acheilognathus lanceolatus (=Acheilognathus intermedia intermedia) from Korea were observed. The ripe eggs of A. lanceolatus from Korea were nearly spindly. The shape was distinguishable from that of Japan. And then the embryonic development of this specimen from Korea was faster than that from Japan. As regards larval development and morphology and distribution of the minute tubercles, however, A. lanceolatus in both Korea and Japan were same except for the mentioned above two characters. These findings suggested that the two formes should be separated at subspecies level.

• Journal of Science Education
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• v.39 no.1
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• pp.44-57
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• 2015

The purpose of this study was to analyze the teachers' Innovation Configuration(IC) on STEAM of the 2009 elementary science curriculum and to implicate the assessment of STEAM. Therefore, this study was conducted by the IC component checklist of the Concerns-Based Adoption Model(CBAM). The total number of 126 teachers participated in this study. The results of the study were as follows: First, time management(33.3%) was the most ideal IC. On the other hand, curriculum planning(34.1%) was the most unacceptable IC. Second, the results of the chi-square test showed that the IC were significantly different according to their positions, career in education and training experiences(p<.05). Third, to explore the teacher's epistemic beliefs on STEAM, one in-service elementary teacher who studied in a doctoral course of a graduate school of education participated in the study. Based on these results, we suggested that the support of application and the revolution of the science curriculum and assessment should be implemented according to the teachers' IC.

• Korean Journal of Community Nutrition
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• v.9 no.2
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• pp.191-203
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• 2004

This study was performed to compare the foodservice management practices in the employee feeding operations of Jeonnam and Chungchong area. Questionnaires were developed and mailed to 160 dietitians with management in employee foodservice of Jeonnam and Chungchong area. Completed questionnaires were received from 124 dietitians with a response rate of 77.5%. The results of this study can be summarized as follows:. Age, work experience, concurrent position and work time of dietitians were significantly higher in the Chungchong area than those in the Jeonnam area. Times of meals and amount of meals served per day in the Chungchong area were significantly higher than those in the Jeonnam area. The type of menu by foodservice operation was high non-selective menu in both areas, especially non-selective menu was high in self-operated place whereas selective menu was high in contract management. Period of cycle menu was 10-15 days in Jeonnam area, but that was 7 days in Chungchong area and so cycle menu of both areas was significantly different (p ＜ 0.001). Most considerable factor in menu planning was preference in Jeonnam area and was cost in the Chungchong area. Food purchasing method was used mostly by automatic computerized order in the Jeonnam area whereas telephone or mail order was high in the Chungchong area.

• The Journal of the Convergence on Culture Technology
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• v.6 no.1
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• pp.501-506
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• 2020

In this experimental study, we have analyzed aerodynamic performance of the four representative types of passenger car vehicles, different types of side window angles, different types of engine hood angles, and the angle difference of the roof line in order to comprehensively analyze how the aerodynamic performance varies with different shape of vehicle. Experiment results showed that the rear window falling at aa certain angle lowered aerodynamic performance, angle difference of the lowered roof line did not affect aerodynamic performance, and the back window line falling at certain angles had no visible effect on aerodynamic performance. Back window line leaning towards front side may help enhance styling aesthetics, but aerodynamic performance decreased. In case of rear diffuser installation, aerodynamic performance also decreased.