• Korean Journal of Soil Science and Fertilizer
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• v.29 no.4
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• pp.360-364
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• 1996

Study on germination ratio and growth of lettuce affected by accumulated salt in vinyl house cultivation soils was investigated by pot test with EC 1.65. 3.50, 5.75. 7.15. 9.50 and 13.57 dS/m. (Germination rate of lettuce in different electric conductivity of 0, 2, 4, 6, 8 and 10 dS/m controlled with KCl were 96.7, 96.7, 87.8, 82.2, 52.2, and 27.8 % respectively. Standing ratio of lettuce in soil below 6 dS/m was more than 60% and in soils of 7.15, 9.50 and 13.57 dS/m they were 45, 32 and 31%, respectively. Growth and fresh weight of lettuces increased significantly in a low EC content soil. The fresh weight of lettuces in the soil of EC 3.50 dS/m was higher than that of the soil EC 1.65 dS/m by 22%, while another soils(EC: 5.75, 7.15, 9.50 and 13.57 dS/m) were decreased 3, 15, 60 and 62%, respectively. Relationship between soil EC and standing ratio of lettuce showed high correlation coefficient($r=-0.9057^{**}$). Therefore, in the field of vinyl houses concentrated salt, standing ratio of lettuce can be foreseen by soil EC [Y = -4.313x+ 82.95 (Y:standing ratio, x:soil EC)], also standing ratio and fresh weight of lettuce showed high correlation coefficient($r=0.8396^{**}$).

• The Journal of Society for e-Business Studies
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• v.12 no.4
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• pp.37-51
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• 2007

As the highly improved Internet and information technology has led to the diversification of users' demands, personalization service attract lots of attention as a means to meet highly diversified demand of users. However, personalization service costs a lot. Also concerns over a possible violation of privacy have been raised since the service uses technology to find out the users' profiles. This research studies the advantages individuals acquire from personalization service and how privacy concern influences service acceptance. Research on related documents and information gathering from e-commerce sites derived six representative types of service. Questionnaires were utilized to research privacy concern according to services, service usefulness, and service acceptance. As expected, privacy concern has a negative relation to acceptance while service usefulness has a positive relation to it, thereby resulting in an offset between two variables. Moreover, they play a different role depending on what kinds of service or in formation should be provided. The results derived from this paper will help the e-commerce sites provide personalization service by collecting personal information while protecting users' privacy.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.9 no.2
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• pp.61-70
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• 2014

Entrepreneurship provides working opportunities to not only an entrepreneur himself but also many other people on the way its process. Boosting entrepreneurship, therefore, seems the most effective way for activating one's economy as well as creating jobs. This study examines factors that influence on entrepreneurial intention of Korean and Korean-Chinese's who will eventually be the potential entrepreneurs. This model tests various theoretical research hypotheses relating to individual psychological characteristics, and entrepreneurial motivation and entrepreneurial intention. Valid 247 questionnaires have been collected within about one month of 2013. Statistical processing of the data collected from this survey to take advantage of the statistical package SPSS 18.0 program through a process of data coding in the following ways: by frequency analysis, factor analysis, regression analysis. The result of hypothesis testing are as follows. The result of analysis shows that risk-taking propensity and desire for self-achievement is not a significant factor to entrepreneurial intention in both countries. But entrepreneurial self-efficiency and entrepreneurial motivation positively influence entrepreneurial intention both of the Korean and Korean-Chinese. At the last, the study examines moderate effect, that is, whether social support influences on entrepreneurial intention as a moderate variable. it is confirmed that the social support does play a positive role to entrepreneurial intention. Beside, discussion is made on the implications of the study for academicians and practitioners, the limitations of the study, and some directions for future studies.

• Korean Journal of Soil Science and Fertilizer
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• v.12 no.1
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• pp.25-34
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• 1979

To clealify the cause of barley and wheat sterility that occurred 77 / 78 cultivation period in Yeongnam area, a few environmental conditions were analyzed. The results are summarized as follows; 1. During the important growing stages such as meiosis and heading stages of barley encountered with severe droughtiness and unusual low temperature. 2. Soil moisture contents in the double cropping paddy soils were higher than cultivated uplands, and in the subsoils than the surface soils, in the clay soils than the sandy soils, in the northern aspect than the southern aspect of slope, respectively. 3. The sterilizing percentage of barley in the double cropping paddy fields were lower than cultivated uplands, in the alluvial fans and plains were lower than cultivated uplands, in the alluvial fans and plains were lower than in rolling or in foot slopes and the northerm aspect of slopes were lower than southern aspect. 4. The sterilizing percentage in the sandy soils were higher than clay soils and in the soils that have shallower plowing layer and shallower available depth had higher sterility. 5. The sterilizing percentage of barley had negative correlation with soil moisture contents in the surface and subsoils in both of cultivated upland or double cropping paddy fields. 6. The droughtiness that prevailed over reproductive growing stages of barley might be cause the sterility and the severe coldness also could be accelerate the phenomenon.

• Journal of Korean Home Economics Education Association
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• v.27 no.3
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• pp.47-61
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• 2015

This study examined whether any differences can be found in desirable character traits and creative personality characteristics depending on the appearance management behaviors of male and female adolescents in Gwangju, South Korea. It was conducted by administering a self-report survey to 544 male and female middle school students. The collected survey data were analyzed by Means, Cronbach's ${\alpha}$, Factor analysis, One-way ANOVA, and Duncan-test using the SPSS/PC WIN 19.0 statistical program. The results were as follows: According to the results of the survey, total coordination seeking in appearance management behavior is very important to teens and is deeply related to desirable character traits and creative personality characteristics. Desirable character traits show positive results for basic living habits, filial piety, respect and affection. Creative personality characteristics show positive results for curiosity, open thinking, risk taking, assignment completion and esthetic appreciation. Considering these findings, there is a need for supplementary content on total coordination seeking behavior in home economics courses. Positive effects in terms of desirable character traits and creative personality characteristics can be expected through after class activities involving clothing habits or searching for a path in life and given the depth of education related to total coordination through a free semester system.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.39 no.3
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• pp.297-302
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• 2006

We investigated gonadal development and sex ratio of artificial seedlings of the oblong rockfish Sebastes oblongus, based on samplings for 370 days just after parturition. The primordial germ cells and genital ridge appeared separately under the mesentery in the yolk-sac stage larva (total length: 7.10-7.77 mm) just after parturition. The primordial germ cells and genital ridge integrated to form primordial gonad in 5-day-old larvae (7.12-9.68 mm), and then proliferation of somatic cell and germ cell occurred in the gonad, which was maintained undifferentiated until 45-days after parturition (18.6-20.4 mm). The ovarian differentiation began in the larva of 50-days old (dab) after parturition (dap) (20.0-24.5 mm). The somatic tissues elongated from the both opposite end-sites of undifferentiated gonad were consequently fused and formed a complete ovarian cavity at 60-days old dap (25.5-32.0 mm). In 80-days old dap (37.3-47.2 mm), meiosis of oogonia occurred to be chromatin nucleolus stage oocyte. The perinucleolus stage oocytes appeared at in 130-days old dap (68.0-86.0 mm), and previtellogenic stage oocytes appeared in 370-days old dap (101.0-116.0 mm). Only female was observed in the artificially produced oblong rockfish in the present study. This result revealed the effect of higher temperature on the sex determination of the oblong rockfish..

• Korean Journal of Environmental Agriculture
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• v.2 no.1
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• pp.6-12
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• 1983

A pot experiment was conducted to clarify the Cd uptake and levels affecting yield loss according to the growth stages of rice plant. The cadmium was treated with several Cd compounds $Cd(NO_3)_2$, $CdCl_2$, $CdSO_4$, $CdCO_3$ and CdS at various concentrations of 0,5,10,25, and 50ppm in soils. The increasing rate of Cd compounds applied to soils increased the Cd content in plant as well as grains but the yield was decreased at high cadmium levels. Cd concentration in soil which could affect the yield decrease were 12.9ppm for $Cd(NO_3)_2$; 21.5ppm, $CdSO_4$; 25.8ppm, $CdCl_2$; 33.2ppm, $CdCO_3$; and 97.6ppm, CdS respectively. Cd concentration in soil reaching at 1ppm of Cd content in brown rice were 13.8ppm from $Cd(NO_3)_2$; 14.4ppm, $CdCl_2$; 16.9ppm, $CdSO_4$; and 19.2ppm, $CdCO_3$, respectively. Cd content in brown rice could be expected with the Cd content in plant at panicle formation stage.

• Applied Microscopy
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• v.40 no.3
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• pp.169-176
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• 2010

Black molly (Poecilia sphenops) and sailfin molly (Poecilia latipinna) are a teleost belonging to Poeciliidae. The spermatogenesis between two species were investigated by light and electron microscope. The whitish testes of both black molly and sailfin molly were located between intestine and air bladder. The size of testis was major axis 7 mm, minor axis 2 mm. The testis contained numerous testicular cysts. In both black molly and sailfin, primary spermatocytes were comparatively large ellipsoidal, and mitochondria showed a marked development. The secondary spermatocyte was smaller than that of primary spermatocyte, highly condensed according to their development. The nucleus with electron-dense was round shape and flagella started to be formed. In spermiogenesis, chromatin was more condensed. The mitochondria were rearranged along the tail. The number of mitochondria was 2 to 4 in cross section and 8 to 10 in longitudinal section. The head of mature sperm was long cone shape and had not acrosome. The microtubules of flagella were arranged 9+2 structure. Also, the tail of sperm have lateral fins. In conclusion, spermatogenesis and sperm morphologies of these two species were same. These morphological similarity seems to be an indication of the Poeciliidae.

• Proceedings of the Korea Water Resources Association Conference
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• 2007.05a
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• pp.693-697
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• 2007

지하수 함양량을 산정하기 위해서 유역물수지 모형 또는 지하수위 변동곡선법등이 활용되어 왔으며, 각각의 장단점에 대한 많은 논의가 있었다. 지역내의 지하수 관리계획을 위해서는 유역물수지 모형이 적합한 반면, 실제(actual) 함양량의 정확성 문제가 있으며, 지하수위 변동곡선법은 실제 지하수의 증감을 통해 실제 함양변화를 잘 표현하는 반면, 그 영향권이 관측공에 의해 제한된다는 단점이 있다. 이와 같은 두 방법의 장점을 살리고 단점을 보완하기 위해 본 연구에서는 유역유출모의와 지하수위 변동을 동시에 고려하여 지하수 함양량을 추정하는 방안을 제시하였다. 수문학적 과정으로 함양을 분석하기 위해 준분포형 수문모형인 SWAT과 완전분포형 지하수 유동해석 모형인 MODFLOW의 결합모형을 이용한 유역단위 유출해석을 수행한다. 실제로 하천변에 위치한 관측공에서의 지하수위는 하천유출시계열과 유사한 양상을 보이며, 상류 경사지에 위치한 관측공의 지하수위는 토양수의 지체와 감수현상을 나타내므로 이같이 시간적으로 상이한 지체 양상을 반영하기 위해 모형내의 비포화대를 통과하는 함양의 거동을 기존의 단일 저수지 모형에서 다단 저수지 모형으로 개선하고 지체함수와 관련된 매개변수를 보정함으로써 모의 함양 시계열과 관측 지하수위 시계열간의 상관성 분석을 수행할 수 있다. 아울러 모의 및 관측 지하수위 분포의 비교를 통해 공간적인 지하수 분포에 대한 검증을 수행함으로써 함양량 산정 절차가 완성된다. 이같은 일련의 절차는 기존의 유역물수지 모형과 지하수위 변동법을 동시에 고려한 새로운 방식의 지하수 함양량 산정기법으로 제시할 수 있을 것이다.성빈맥(1예), 저심박출증(3예), 재수술이 필요했던 출혈(2예), 흉골 지연봉합(2예), 급성 신부전(2예), 폐렴(1예), 대동맥내 풍선펌프로 인한 혈전색전증(1예),수술 후 섬망(2예) 등이 있었다. 생존한 10명의 환자들 중 1명을 제외한 나머지 9명의 환자에서 $38{\pm}40$개월간의 추적관찰이 되었는데, 추적 관찰 기간 중에 3명이 사망하였고 생존한 6명의 환자는 모두 양호한 상태(NYHA 기능등급, $I{\sim}II$)를 보였으며, 그 중 3명에서는 혈역학적으로 큰 의미가 없는 잔여단락이 있었다. 결론: 급성 심근경색증 후 심실중격 결손은 수술위험도가 높은 질환이지만, 수술 전 대동맥내 풍선펌프를 삽입하고 조기에 심실중격 결손부의 infarct exclusion 술식과 함께 관상동맥우회술을 시행함으로써 만족할 만한 수술 및 중기 결과를 얻을 수 있었다.출물 투여로 저하되었으나 NC군보다는 높게 나타났다. 간 중 중성지질 함량은 참나물 에탄올 추출물 투여 용량에 따른 유의차가 없었으나, 총콜레스테롤 함량은 고용량 병합투여한 HC-PBH군만 유의하게 저하되었다. 혈청 및 간 중의 지질 함량 변화는 정상식이를 급여한 NC군과 NC-PB군 간에는 유의차가 없었다. 따라서 고콜레스테롤식이를 급여하면서 참나물 에탄올 추출물을 병합투여 시에만 지질대사 개선 효과가 있는 것으로 여겨지며, 고용량 병합투여 시 효능이 더 큰 것으로 나타났다. 고콜레스테롤식이로 인한 산화적 스트레스가 고콜레스테롤혈증을 유발하였으며, 이는 참나물 에탄올 추출물에 함유된 항산화물질을 포함한 여러 생리활성물질

• Korean Journal of Environmental Agriculture
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• v.1 no.1
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• pp.53-58
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• 1982

A study was carried out to examine the effects of chlorine and hydrogen chloride gas with various concentrations (0.1, 0.25, 0.5 and $1.0\;g/m^3/hr)$ on rice and soybean plants. Symptoms, ratios of destroyed leaf, grain yield and chlorophyll contents in leaves were investigated. The results are as follows. 1) Hydrogen chloride gas damaged the margine parts of rice and soybean leaves, but chlorine appeared grayish subtle spots in whole parts of rice and soybean leaves. 2) Rice leaves showed higher damage ratio in hydrogen chloride fumigation than in soybean leaves, but less damage in chlorine. 3) Chlorophyll contents in rice leaves were higher in chlorine gas fumigated than hydrogen chloride fumigated. 4) The ratio of destroyed leaf was negatively correlated with chlorophyll contents.