• Journal of Educational Research in Mathematics
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• v.27 no.4
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• pp.663-678
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• 2017

Semiotic studies in mathematical education have been based on Saussure, Peirce, and Frege and many prior researches have explored the concepts in a perspective of semiotics. However, the relationship among semiotical elements and the formation and the evolution of a conception are still ambiguous and veiled in many aspects. This thesis is intended to show how a conception was formed and evolved by expression, which is an element of semiotics. In this process, I sought to partially illuminate the relationship among expressions, concepts, and objects.

• Journal of the Korean earth science society
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• v.35 no.5
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• pp.385-398
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• 2014

This study investigated students' alternative conceptions of plate boundaries and their conception revision according to the pattern of students' reasoning. Participants were twenty-two 10th grade high school students. All participants were asked to draw the three types of plate boundaries and to explain their drawings. Nine students participated in the reasoning activity. To this end, a semi-structured interview was conducted during which key questions were asked for the students to individually answer. The key questions used in the reasoning activity were created, by utilizing questions used in the previous studies. The findings revealed that the alternative conceptions of plate boundaries were classified into three levels based on established criteria. Students who attempted a variety of reasoning strategies such as causal reasoning, using an analogy, abductive reasoning, data reconstruction and concept combination, revised their alternative conception to a scientific conception after the reasoning activity. On the other hand, some students could not revise their alternative conceptions because they only conducted an incomplete reasoning strategy. The study also found that they were unable to use other reasoning strategies, either.

• Proceedings of the Korea Society of Design Studies Conference
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• 2003.11a
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• pp.38-39
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• 2003

• Journal of Korean Academy of Fundamentals of Nursing
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• v.9 no.1
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• pp.133-143
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• 2002

Purpose: The purpose of this study was to describe perceived conception of health, family support and health Promoting behavior; as well as to assess factors that influence health promoting behavior. Method: Study participants were 165 elderly people over the age of 65, living in C city. The instruments were Laffery's health concept scale, the family support scale by Kang, and the health promoting behavior scale by Walker et al. Results : 1. The scores for level of health concept ranged from 28 to 112, and had a mean score of 75.16. The scores for level of family support ranged from 11 to 55, and had a mean score of 41.55. The scores for health promoting behavior ranged from 40 to 160 with mean score of 98.07. For health promoting behavior the participants revealed that the most frequent practices were in nutrition, and the least frequent, in exercise. 2 Higher levels of health conception and family support were correlated with an improving level of health promoting behavior. 3. The factor most influencing health promoting behavior in elderly people was family support. Family support accounted for 11% of the variance in health promoting behavior. A combination of health conception, education level and dwelling pattern accounted for 23% of the variance in health promoting behavior. Conclusion : Perceived health conception and family support were identified as important variables for health promoting behavior in elderly people.

• Archives of design research
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• v.17 no.2
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• pp.105-112
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• 2004

Taking a broad view on the study, it enables one to understand all over the subject or discover some problem. On this thesis, by taking a broad view, the advertising was considered as a television media contents. And attempted to establish the identity of the audience's conception about the social or cultural influencing power of an advertising. Among the television media contents, the drama and cinema was compared with the advertising because of their influencing power in each personal, and tried to clarify diversely the influencing power of advertising. The influencing power survey for the advertising, cinema, drama was practiced by checking his or her conception about below three television media contents - advertising, cenema, drama. And the data were statistically conducted. As the result, some significant conception was found. The participants on the survey conceived the advertising as in the concept of 'Accomplishment', 'Variable', 'Progressive'. This results are considered as they prefered to be influenced by the advertising rather than the drama or cinema in the conception of 'New', 'Variety', 'Progressiveness'.

• Korean Journal of Veterinary Research
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• v.26 no.1
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• pp.163-174
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• 1986

The 587 Holstein cows which calved from January 1983 to December 1984 at an integrated dairy farm in Chung-nom province were examined for the incidence of reproductive disorders and their conception rate after treatment. The results obtained were as follows; 1. The incidence of reproductive disorders was 47.9% (281 heads) among 587 heads which calved. 1) As number of calvings increased, the incidence of reproductive disorders decreased. 2) The cows which calved in spring and summer showed significantly higher incidence of reproductive disorders than those which calved in autumn and winter (p<0.05). 3) Among reproductive disorders, ovarian, uterine, cervical and vaginal diseases figured 54.3%, 43.7%, 0.9% and 0.6%, respectively. 4) Among individual genital diseases, endometritis (40.3%) occurred most frequently. 2. Among 281 heads with reproductive disorders, 216 heads(76.9%) conceived after treatment. 1) After treatment of reproductive disorders, the conception rate by number of calvings was in range from 69.6% to 87.5%. 2) The cows which calved in summer and winter showed significantly higher conception rate after treatment of reproductive disorders than those which calved in spring and autumn (P<0.05). 3) The conception rates after treatment of the cows with ovarian, uterine, cervical and vaginal diseases were 66.5%, 81.2%, 33.3% and 50.0% respectively. 4) The cows with endometritis showed the highest conception rate after treatment (85.9%).

• Journal of Korean Elementary Science Education
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• v.19 no.1
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• pp.41-56
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• 2000

The purpose of this study was to investigate the change of elementary school students' conception on the movement of the moon, after teaching a lesson about the lunar phase which focused on concrete activities. The 396 subjects in this study consisted of intact groups of second, third, fourth, fifth, and sixth grade students. Pre-test and post-test instrument concerning on the conception in the movement of the moon were developed after reviewing the related literature and curriculum. Prevailing conceptions were identified by frequency of each conception. Then, the pattern of change and consistency of each conception were analyzed in comparison pre-test with post-test. To figure out the effect of teaching, the GEFT and the GALT instrument were administered to analyze it by gender, cognition mode and level. SPSS/WIN programs were used to process the data. The result showed that teaching 'movement of the moon' was the most effective in fourth grade. The effect of teaching 'changes in shape of the moon' was effective regardless of their sexes. Teaching 'changes in shapes of the moon' was more effective for the students whose cognitive modes were field-independent, than those filed-dependent. But the improvement by the teaching was not significantly different. The pre-score by cognitive level was significantly high in the order of the formal operational, transitional stage and the concrete operational stage. But the improvement of conception after teaching was high in the order of the concrete operational, transitional stage and the formal operational stage. That is to say, teaching was more effective as the cognitive level lowered.

• Journal of Embryo Transfer
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• v.18 no.2
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• pp.97-108
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• 2003

In-vitro fertilized Hanwoo embryos were biopsied for sex determination by PCR. Biopsied embryos were incubated for 1∼2 hours for the recovery. Those sexed Hanwoo embryos were transferred to 49 Hanwoo and 16 Holstein recipients from February 2000 to February 2001. Of 65 recipients, 14 cows(12 Hanwoo and 2 Holstein) delivered the same offspring as sex-determined by PCR, therefore the conception rate was 21.5%. 1. Total 65 embryos(male 35, female 30) were transferred to recipients, and 14 calves (male 6, female 8) were delivered. In comparison between sex by PCR method and sex of calves born after embryo transfer, the accuracy of sex determination was 100.0%. 2. The conception rate after transfer with biopsied embryo between Hanwoo and Holstein was 24.5% and 12.5% 3. The conception rate after transfer with biopsied embryo between fresh and frozen-thawed embryos was 23.5% and 14.3%. 4. The conception rate according to the season when embryo was transferred was 11.8, 29.4, 23.5 and 20.0% for spring, summer, autumn and winter, respectively. 5. The conception rate according to embryo quality after biopsy was 41.7, 30.0 and 0.0% for excellent, good and fair quality. 6. The conception rate according to thickness of uterine horn was 71.4, 18.9, 11.8 and 0.0% for 0, +, ++ and +++ thickness. 7. The conception rate according to the site in the uterine hem where embryo was put was 30.0, 20.0 and 10.0% for cranial, mid, and caudal part of uterine horn. 8. The conception rate according to the quality of corpus luteum ipsilateral to the uterine horn where embryos was transferred was 41.2, 14.3 and 15.4% for excellent, good and fair quality. 9. The conception rate according to the time required for embryo transfer was 18.2, 30.0, 30.0, 0.0 and 25.0% for 10, 15, 20, 25 and 30 minutes. 10. The conception rate according to parity of recipients was 26.5, 19.1, 14.3 and 0.0% for the primiparous, the 2nd parous, the 3rd parous and the 4th parous recipients. These results indicated that fresh embryos are more demanded than frozen-thawed embryos for good conception rate in embryo transfer with biopsied-sexed embryo. Also, it was indicated that we should consider embryo-recovering condition, recipient's uterine thickness, transfer site in uterine horn, quality of corpus luteum, time required for transfer and parity of recipient to achieve good conception rate in ET with biopsied-sexed embryos.

• Korean Journal of Agricultural Science
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• v.37 no.3
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• pp.393-398
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• 2010

Early pregnancy diagnosis of bovine is an essential component for efficient reproductive plan in farms because long term of non-pregnancy results in economic losses by failure of offspring production and low milk yield in dairy cattle. The major steroid hormones related with reproduction are known to be progesterone and estrogen in bovine pregnancy. To evaluate detection level of hormones in milk, plasma and milk progestrone and estrogen of Holstein cows was analyzed during artificial insemination (AI) and embryo transfer (ET). Progesterone concentration at 21 days postestrus was significantly different in plasma and milk between pregnant and non-pregnant cows. Estrogen concentration at estrus was higher in pregnant recipients than that in non-pregnant recipients. To analyze correlation between hormone levels and conception rates in Holstein, the conception and return rates were checked following AI, and the returned cows were on the track of pregnancy after consecutive AI. Pregnant cows following first AI were considered as high conception group while pregnant cows following third AI were rated as low conception group. Proportion of high and low conception groups in this study was 78.2% and 9.1%, respectively. Hormone analysis indicated that high conception group had higher estrogen level during estrus than low conception group ($26.45{\pm}3.32$ vs $19.017{\pm}2.97$). Progesterone level was not different between high and low conception groups during estrus but increased significantly after 21 days postestrus (21 day: $4.95{\pm}1.12$ vs $0.95{\pm}0.23$, 35 day: $12.47{\pm}3.82$ vs $2.41{\pm}1.21$). In conclusion, the pattern of progesterone and estrogen secretion in Holstein milk samples could be a good candidate for early pregnancy detection and selection of recipients during ET.

• Proceedings of the Korea Society of Design Studies Conference
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• 2004.10a
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• pp.204-205
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• 2004