• Title/Summary/Keyword: Science and Technology (S&T)

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Factors Affecting the Productivity of Germ-line Chimeras from Jl Embryonic Stem Cells (Jl 배아주세포를 이용한 효율적인 생식선 이행 카이미라의 생산)

  • Kim, S.U.;Koo, B.S.;Jeong, S.;Lee, T.H.;Yu, S.L.;Nam, Y.I.;Kim, J.L.;Hyun, B.H.;Shin, H.S.;Lee, K.K.;Sang, B.C.;Yu, D.Y.
    • Korean Journal of Animal Reproduction
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    • v.25 no.1
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    • pp.71-77
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    • 2001
  • This experiment was designed to improve the production efficiency of germ-line chimeric mice from phospholipase C (PLC)-$\beta$3 or peroxiredoxin (Prx) E -targeted ($\Delta$) ES cells by the investigating the manipulation conditions and characteristics of Jl ES cells. Four targeting clones were isolated to investigate the karyotypical and morphological stability prior to injection. All clones ($\Delta$PLC$\beta$-3 C3, $\Delta$Prx II C3, C10 and I5) showed more than 80% euploidism, however, most of $\Delta$PLC$\beta$-3 C3 clones were extensively differentiated compared to the other clones. Nine of 13 $\Delta$Prx II chimeras appeared to have at least 80% chimerism, whereas $\Delta$PLC$\beta$-3 C3 chimeras had 20% chimerism at most. Therefore, the morphological stability of ES cells under stable euploidism might mainly affect the production rate of high-coat chimeric mice. To increase the collection rate of injectable blastocysts (IBs), 5 to 10 week -aged C57BL/6J female mice were sacrificed at 3.5 days post-coitum. Ten week-aged mice were the most optimal IB donors by showing the highest collection rate (2.94/mouse) of injectable blastocysts without increase of non-injectable embryos (0.29/mouse). Foster mothers might be another factor because ICR x C57BL/6J F1 foster mother showed more increased productivity in litter size (2.8 vs. 5.6) and chimera (0 vs. 35.3%) than those of ICR foster mothers. In conclusion, the efficient production of germ-line chimeras mainly depends on the maintenance of ES cell morphology during targeting procedure, and the establishment of manipulation conditions might be a key point to maximize it.

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Learning style, Time management behavior and Self-directed learning of Nursing student (간호대학생의 학습유형, 시간관리 행동 및 자기주도적 학습능력)

  • Kim, In-Kyoung;Seong, Ji-A
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.16 no.7
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    • pp.4621-4631
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    • 2015
  • The purpose of this study is to find the grounds for nursing students and teaching professors to confirm the importance of planning and preparing academic careers according to proper time management by determining the learning style exactly for themselves. For this purpose we investigated the learning style and time management behavior of the nursing student in university. The data was collected for 1 months from Nov. 1 to Dec. 2, 2013 in four universities which located in D city and C province. The research tool were used to measure of the learning style, time management behavior and self-directed learning. The participants were 246 nursing students at university who understand the purpose of study and agree to answer it. The data was analyzed by descriptive statistics, t-test, ANOVA, Pearson's correlation, stepwise regression using the IBMSPSS/WIN 19.0 program. The result of this study was that the predicting factors for self-directed learning were time management behavior(${\beta}=.629$, p<.001) and adjustment to university life(${\beta}=.153$, p<.001). The variables explained the self-directed learning by 51.4%. This study shows that professors have to encourage students to realize the importance of effective time management for planning, performing and evaluating the academic career for themselves and take into account the related programs about self-directed learning.

A Design and Effect of STEAM PBL based on the History of Mathematics (수학사를 활용한 융합적 프로젝트기반학습(STEAM PBL)의 설계 및 효과 분석)

  • Lee, Minhee;Rim, Haemee
    • School Mathematics
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    • v.15 no.1
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    • pp.159-177
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    • 2013
  • This study is a case study of STEAM education. We have developed teaching and learning materials, suggested teaching method, and analysed the result for exploring the potential and effect of STEAM. The content of this study is based on the history of mathematics. Science (S) is related to the 24 divisions of the year, the height of the sun, the movement of heavenly bodies. Technology (T) is related to the exploration with graphic calculators. Engineering (E) is related to design sundial and research on the design principles. Art (A) is related to literature review about mathematical history, the understanding of the value of the mathematics. Mathematics (M) is related to the trigonometric functions. We have considered that Project-Based Learning is proper teaching and learning for STEAM education, we have designed the STEAM PBL and analysed the results focused on the developing integrative knowledge, mathematical attitude including mathematical value, the competencies of 21 century. The result of this study is as follows. We find that STEAM education activates students' collaboration, communication skills and improves representation and critical thinking skills. Also STEAM education makes positive changes of students' mathematical attitudes including the values of the mathematics.

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Relationship among Emotional Intelligence, Critical thinking and Major satisfaction in Nursing students (간호대학생의 감성지능, 비판적 사고성향, 전공만족도와의 관계)

  • Kim, Young-Soon;Oh, Eun-Ju
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.17 no.7
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    • pp.103-111
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    • 2016
  • To provide baseline data for interventions to improve nursing students' satisfaction with their major, this descriptive correlational study analyzed the relationships among emotional intelligence, critical thinking, and major satisfaction. To set up the research data, questionnaires were collected from 232 nursing students in 3 nursing colleges of cities K and B from May 15th, 2014 to June 15th, 2014. SPSS 21.0 was used to analyze the data for the descriptive statistics, t-test, ANOVA, Scheffe's test, and Pearson correlation coefficients. The results are as follows. First, the mean scores of emotional intelligence (4.93), critical thinking (3.43), and major satisfaction (3.76) were above the moderate level but showed significant differences according to gender, grades, and motivations for choosing the major and challenges in college life. Positive correlations were observed among emotional intelligence, critical thinking, and major satisfaction Therefore, when designing an intervention program to improve the major satisfaction, it is recommended to consider a plan that enables them to develop emotional intelligence and critical thinking.

Factors Influencing on Learning Flow to Nursing Students Self-Leadership and Academic Self-Efficacy in both Online and Offline Lectures (온·오프라인 수업을 병행한 간호대학생의 셀프리더십과 학업적 자기효능감이 학습몰입에 영향을 미치는 요인)

  • Lim, Se-mi;Yeom, Young-Ran
    • Journal of Convergence for Information Technology
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    • v.10 no.11
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    • pp.107-116
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    • 2020
  • The purpose of this study was to identify the degree of self-leadership, academic self-efficacy, and learning flow of nursing college students to took both online and offline lectures, and to identify the factors that influence learning flow. Data were collected by using questionnaires from 152 students who were in 2nd year of the nursing college in G city, from September 7 to September 29, 2020. Data were analyzed by t-test, ANOVA, Pearson's correlation, and stepwise multiple regression using SPSS WIN 25.0 program. As a result of the study, Learning flow according to general characteristics showed significant differences in perceived health status, interpersonal relationship, major satisfaction, and grades. Statistically, learning flow showed a significantly positive correlation with self-leadership and academic self-efficacy. Influencing factors on learning flow were academic self-efficacy(β=.44, p<.001), self-leadership(β=.35, p<.001), and major satisfaction(β=-.14, p=.031) accounting for 57% of the total change. Based on this study, strategies to enhance academic self-efficacy and self-leadership are required to improve the learning flow of nursing students.

The Effects of Satisfaction with Culinary-Related Majors at Local Junior Colleges on Learning Immersion and Self-Efficacy

  • Pyoung-Sim Park
    • Journal of the Korea Society of Computer and Information
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    • v.28 no.9
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    • pp.137-148
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    • 2023
  • This study investigated the influence of major satisfaction on learning flow and self-efficacy of students majoring in culinary arts at local junior colleges. In the 2022-2 semester, 260 freshmen and sophomore college students majoring in culinary from five junior colleges in the Gwangju and Jeonnam regions were analyzed. For data processing, SPSS Ver. 25.0 was used. The data is used to measure reliability by Cronbach's α, t-test, ANOVA, Pearson's correlation coefficient, and multiple regression analysis. The results of this study are as follows : First, there was a difference in satisfaction between freshmen and sophomores in major satisfaction with cooking related departments at local junior colleges. Second, there was a significant effect of satisfaction with cooking-related majors at local junior colleges on learning immersion. Third, there was a significant effect of satisfaction with cooking-related majors at local junior colleges on self-efficacy. In conclusion, it was found that major satisfaction affects learning immersion and self-efficacy for both students enrolled in cooking-related departments at local junior colleges. In the future, we suggest follow-up research on educational measures to increase learning immersion and self-efficacy for students who are not majoring in cooking in the high school curriculum and students who are insufficient in major classes due to part-time jobs during the semester.

Influences of Supplemental Plant Phytase (Phytazyme®) on Performances and Phosphorus Excretion in Laying Hens (사료내 식물성 Phytase (Phytazyme®) 첨가가 산란계의 생산성 및 인 이용성에 미치는 영향)

  • Kwon, S.K.;Kim, S.K.;An, B.K.;Yang, U.M.;Nam, K.T.;Kang, C.W.;Kang, S.J.
    • Journal of Animal Science and Technology
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    • v.44 no.1
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    • pp.55-60
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    • 2002
  • Two experiments were conducted to investigate the effect of dietary supplementation of plant phytase (Phytazyme$^{(R)}$) in corn-soybean meal based diets on utilization of phytase-bound phosphorus in laying hens and evaluate nitrogen(N) digestibility and phosphorus(P) availability in breeders. In the experiment one, three levels of the Phytazyme$^{(R)}$(0.05, 0.1, and 0.2% of diet) were added to diets containing a half of control TCP level(0.96%) for 4 wks. Feed consumption, egg production rate, egg weight and eggshell quality were recorded weekly. At the end of experiment, 8 birds per treatment were sacrificed, liver weight were weighed and right tibiae were removed for determination of P content. The second experiment was conducted to evaluate the P availability and nitrogen digestibility in breeders fed same diets for 2 wks. Feed and excreta were collected to determine the P and N contents for the last three days of experiment two. Addition of Phytazyme$^{(R)}$ resulted in no effects on feed intake, egg product rate, egg weight and egg shell quality. P excretion decreased and its availability enhanced as phytase supplementation increased in diets. Dietary supplementation of Phytazyme$^{(R)}$ above 0.1% level in corn-soybean meal based diets did not have an adverse effect on production and decreased level of phosphorus in excreta.

Metabolizable Energy Requirement of Growing Hanwoo Bulls for Maintenance by Energy Equilibrium Metho (에너지 균형법에 의한 한우 수소의 유지 대사에너지 요구량)

  • Lee, S. C.;Thak, T. Y.;Kim, K. H.;Yoon, S. G.
    • Journal of Animal Science and Technology
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    • v.45 no.1
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    • pp.123-130
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    • 2003
  • Metabolizable energy requirements for maintenance (MEm) of Hanwoo bulls were estimated in twelves metabolism trials using three different feeds at four stages of body weight(100, 200, 300 and 400kg). Three feeds were composed of 1) concentrates and rice straw, 2) concentrates and mixed grass hay, 3) concentrates and corn silage, respectively. Three energy levels were 1) maintenance (M) requirement, 2) 1.5 ${\times}$ M, and 3) 2.0 ${\times}$ M. All bulls were received 60% of their energy from concentrates and 40% form roughages. Three cattle for each trials fed different energy level were housed in metabolism stalls during the 5days of collection period, a total collection of feces and urine. Thereafter, during the 2days of respiration period the heat production was measured by indirect calorimetry using respiratory chamber. MEm were 99.80, 94.48, 94.80, and 97.68 kcal/W0.75 at 100, 200, 300 and 400kg. Mean value of MEm and efficiency of utilization ME for retained energy(Kg) were 95.80 kcal/W0.75 and 0.44.

Studies on the Detections of Congenital Genetic Disorder in Holstein Proven and Candidate Bulls (Holstein 보증종모우 및 후보종모우의 선천성 장애 유전좌위 검색에 관한 연구)

  • Lee, Y.K.;Jang, K.W.;Nam, I.S.;Jang, W.K.;Tak, T.Y.;Kim, G.N.;Lee, K.J.
    • Journal of Animal Science and Technology
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    • v.44 no.3
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    • pp.279-288
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    • 2002
  • This study was performed to discriminate defective loci by detection of congenital genetic disorder, to offer basic data for selection and improvement of Korean dairy cattle using frozen semen of Holstein bulls(16 proven and 93 candidate). The results obtained were as follows ; By the detection of DUMP(deficiency of uridine monophophate synthase) for 109 Holstein bulls(16 proven and 93 candidate), DUMP carrier was not found in whole animals. Also, it was possible to early detection of DUMP carrier by using PCR-RFLP(AvaⅠ). As the results of detection for BLAD(bovine leukocyte adhesion deficiency), BLAD carrier was not found in 16 proven bulls. But 5 candidtae bulls are discriminated to BLAD carrier, and it could be predicted to transmitted pathway of inherited loci by pedigree identification. Also, when digesting PCR products using restriction enzyme, results from TaqⅠ restriction enzyme were more efficient than that of HaeⅢ. After detection test of citrullinaemia, it was concluded that proven and candidate bulls were not. However, wide range of research and citrullinaemia genotyping should be performed. As a result of this study, the wide and various research should be performed in genetic disease of animal. And in the selection and breeding of animal, the breeding scheme by completely and continuously management of pedigree should be established.

Development and Effectiveness of a Spiritual Care Education Program for Nurses (간호사를 위한 영적간호교육프로그램의 개발 및 효과)

  • Choi, Soo-Kyung;Kim, Jin;Kim, Se-Young
    • Journal of Convergence for Information Technology
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    • v.9 no.9
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    • pp.67-77
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    • 2019
  • This study was conducted to examine effects of the spiritual care education program on self esteem, communication, existential well-being and spiritual care competence in nurses. A non-equivalent control group, non-synchronized with pre-posttest design was used. The participants were 63 nurses(30 in an experimental group and 33 in a control group)attending a bachelor program of C Colledge in G metropolitan city. The experimental group attended 7 sessions of a SCE(Spiritual Care Education) program. Sessions were 90 minutes each, held once per week for 7 weeks. The scores for self-esteem, communication, existential well-being and spiritual care competence were measured before and after the treatment. Data were collected between October 10 and December 5, 2017 in an experimental group, April 24 and June 5, 2018 in a control group. Data were analyzed using Chi-square, Fisher's exact test, independent t-test using SPSS/WIN 21.0. The existential well-being(p<.025) and spiritual care competence(p<.001) were significantly increase in the experimental group compared to the control group after the intervention. Results suggest that this SCE program could be effective in increasing the existential well-being and spiritual care competence of nurses.