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A Study on the Compaction and Consistency of Soil (흙의 다짐과 Consistency에 관한 연구)

  • 윤충섭
    • Magazine of the Korean Society of Agricultural Engineers
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    • v.18 no.4
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    • pp.4251-4258
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    • 1976
  • In the construction of earth dam, embankment and highway by filling, a compaction contributes to increasing the density of soil by applying pressure. The effect of compaction depends on various factors such as soil type, moisture content, gradation, consistency, and compaction energy. In this study, the correlations amone maximum dry density, moisture content, dry density, and moisture content are analyzed. Some results obtained in this study are summarizep as follows. 1. The maximum dry density sinoreases with increased of optimum moisture content and the correlations of them can be represented by; ${\gamma}$dmx=a-b(W0) 2. Maximum dry density and liquid limit show negative linear correlation and can be represented by; ${\gamma}$dmx=a-b(LL). 3. Optimum moisture content and liquid limit, plastic limit show positive linear correlation and can be represented by the following equation, W0=a+b(LL) W0=a+b(PL). 4. Liquid limit and plastic limit show positive linear correlation, and can be represented by the following equation, LL=a+b(PL).

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Correlation of Lipid Soluble Compounds of Colored Rices and its Mutagenicity, Antimutagenicity and Antioxidativity (유색미 지용성 성분들의 변이원성.항변이원성.항산화 효과에 대한 상관관계)

  • Shin, Su-Young;Kang, Mi-Young;Nam, Seok-Hyun
    • Applied Biological Chemistry
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    • v.46 no.3
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    • pp.214-219
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    • 2003
  • The fractions extracted with methylene chloride from colored rice seeds of 19 cultivars were prepared to examine the correlationties of both antimutagenicity and antioxidiativity with physiological functionalities. The data revealed a positive correlation of the antimutagenicity with the content of $(3.{\beta},22Z)-Acetate-stigmasta-5,22-dien-3-ol$, 24-Oxocholesterol acetate, 6(E),8(E)-Heptadiene, and Eicosane. For antioxidativity, electron donating ability to DPPH radicals exhibited a positive correlation with the content of (24R,25S)-Aplysterylacetate, however, negative correlations were found between scavenging activity toward hydroxyl radicals and the content of either Tetradecanoic acid or Methyl ester-hexadecanoic acid, $(3.{\beta},24S)-Stigmast-5-en-3-ol$, respectively. In addition, a positive correlation was detected between the inhibitory effect of the fractions and the content of $(3.{\beta},24S)-Stigmast-5-en-3-ol$, however, a negative correlation with the content of 3',3'-Dimethylspiro [acridane-9,1'-indane], $(3.{\beta})-24-Methylene-9,19-cyclolanostan-3-ol$, and some other compounds was observed, respectively.

Exploration of Fit Reviews and its Impact on Ratings of Rental Dresses

  • Shin, Eonyou;McKinney, Ellen
    • Fashion, Industry and Education
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    • v.15 no.2
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    • pp.1-10
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    • 2017
  • The purposes of this study were to explore (1) how fit reviews differ among height groups and (2) how overall numerical ratings differ depending on height groups and ifferent types of fit reviews. Content analysis was used to analyze systematically sampled online consumer reviews (OCRs) of formalwear dresses rented online. In part 1, 201 OCRs were analyzed to develop the coding scheme, which included three aspects of fit (physical, aesthetic, and functional), valence (negative, neutral, positive), and overall numerical rating. In part 2, 600 OCRs were coded and statistically analyzed. Differences in frequency were not found among height groups for any types of mentions (negative, neutral, and positive) in terms of the three aspects of fit in the OCRs. Differences in overall mean ratings were not found among height groups. Interestingly, valence of each aspect of fit reviews affected mean numeric ratings. This study is new in examining relationships among textual information (i.e., fit reviews), numerical information (i.e., numerical rating), and reviewer's characteristic (i.e., height). The results of this study offered practical implications for etailers and marketers that they should pay attention to the three aspects of fit reviews and monitor garments with negative fit evaluations for lower ratings. They may attempt to increase ratings by providing customers recommendations to get a better fit.

Effects of Congruence between Orientations and Reward Systems on the Performance of R&D Professiionals (연구원의 경력지향성과 보상의 적합도가 성과에 미치는 영향)

  • 박현아
    • Proceedings of the Technology Innovation Conference
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    • 1999.06a
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    • pp.140-174
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    • 1999
  • This study proposed the model of research describing the positive impact of fitness between career orientations and reward systems on the performance of R&D professionals. To prove the propositions of the model, a questionnaire survey was conducted 204 professionals in 19 R&D research institutes related with electronics and communication industries provided answers for the questionnaire. The results of the survey were summarized in the following. 1) Career orientations of R&D professionals can be categorized into three dimensions : managerial, technical/professional, and project orientation. 2) The rewards consist of four dimensions : financial, social status, job content, and professional reward. 3) The age and tenure of R&D professionals has the negative impact on the project orientation. 4) The education level of R&D professionals has the positive impact on the professional orientation. 5) The sex was found as insignificant variable career orientation. 6) The person with strong prefers social status rewards to other rewards, the professional orientation is prefer to professional rewards, and the project orientation is prefer to job content rewards. 7) For the professionals with professional and project orientation, the congruence with each reward delivered positive impact on job satisfaction, job involvement, and organizational commitment. However it created negative impact on turnover intention and job stress.

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Effect of Moisture, Relative Humidity and pH on Color and Pigments of Cold Storage Beef Meat (수분함량, 상대습도 및 pH가 냉장 우육의 색도 및 색소에 미치는 영향)

  • 정인철;문귀임;김기영;김미숙;이교연;강세주
    • The Korean Journal of Food And Nutrition
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    • v.11 no.2
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    • pp.221-227
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    • 1998
  • This study was investigate correlation of moisture content, relative humidity, pH, color difference, myoglobin(Myo), oxymyoglobin(Oxy) and metmyoglobin(Met). The moisture content, relative humidity of loin and shank were not changed uniformly during storage, the pH was raised according to storage period. The L value was raised at the closing stage of the storage period, the surface of the b value was higher than interior. Between Myo and Met were positive correlation in common with loin and shank. The surface and interior of loin were negative correlation between Oxy and Met, the surface and interior shank were positive correlation between Myo and L value and were negative correlation between Myo and Oxy. The moisture content, relative humidity, pH and color was not correlation uniformly.

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Soil Chemical Property and Leaf Mineral Nutrient of Ginseng Cultivated in Paddy Field Occurring Leaf Discoloration (인삼 논재배에서 황증이 발생한 토양과 식물체의 무기성분 함량 특성)

  • Lee, Sung Woo;Park, Kee Choon;Lee, Seung Ho;Park, Jin Myeon;Jang, In Bok;Kim, Ki Hong
    • Korean Journal of Medicinal Crop Science
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    • v.21 no.4
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    • pp.289-295
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    • 2013
  • This study was carried out to investigate the cause of leaf discoloration occurring frequently in paddy cultivation. Chemical property of soil and inorganic nutrient component of leaf were analyzed on abnormal fields of 7 regions where leaf discoloration occurred severely and normal fields of 7 regions among ginseng garden. The pH of abnormal fields was strong acidic condition (pH 5.51) compare to normal fields of slightly acid condition (pH 6.42). Calcium and magnesium content in abnormal fields were lower distinctly than that of normal fields, while EC, organic matter, phosphate, and potassium content showed not distinct difference between abnormal and normal fields. Whereas calcium and magnesium content were distinctly high in normal fields, both of potassium and iron content of ginseng leaf were distinctly high in abnormal fields. In particular, iron content of abnormal fields was more 1.94 times in soil, and 3.03 times in leaf than that of normal fields. In soil chemical property, there were significant negative correlation between leaf discoloration ratio and soil pH, and there were also significant positive correlation between leaf discoloration ratio and iron content. In ginseng leaf, there were highly significant negative correlation between leaf discoloration ratio and calcium content, and there were also highly significant positive correlation between leaf discoloration ratio and iron content.

Nutritional and antioxidant status by skin types among female adults

  • Bae, Hyun-Sook;Choi, Sung-Im;Ahn, Hong-Seok
    • Nutrition Research and Practice
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    • v.4 no.3
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    • pp.215-221
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    • 2010
  • This study was performed to analyze the relationship among sebum hydration content of the skin and nutritional intake, serum antioxidant minerals and antioxidant enzymes, and lipid peroxide concentration in 50 female subjects in their 20s. The skin type was divided into Dry Skin, Mixed Skin, and Oily Skin, and the dry skin group was 14%, the mixed skin group was 56%, and the oily skin group was 30% of all subjects. The average age of the subjects was $20.54{\pm}1.43$ years and BMI was 20.66. The average sebum content in each group was in the order of T-zone>forehead>chin>cheek. In case of the T-zone, a significant difference between the dry skin group and the oily skin group was observed, suggesting that the area is most sensitive to sebum content by skin type. Significant differences were not observed in energy and nutrient intakes by skin type. Serum concentrations of antioxidant minerals such as copper, manganese, zinc and selenium were not significantly different among the groups, but the dry skin group tended to be higher than the oily skin group. Serum catalase was significantly higher in the oily skin group (P < 0.05), and MDA was significantly higher in the mixed skin group (P < 0.05). The hydration of the cheek and serum zinc showed a negative correlation, and the sebum content of the cheek and GPx showed a significant negative correlation. The hydration of the forehead and serum copper showed a significant negative correlation, and the hydration of the forehead and GPx showed a significant positive correlation. The hydration of the chin and serum SOD showed a significant positive correlation. With these results, it is considered that the basic condition of nutritional status can affect the skin health.

A Study on the Impact of the Attitude of Cyber Home Study using Structural Equation Model on the Effectiveness of Cyber Home Study (구조방정식 모형을 이용한 사이버가정학습에 대한 태도가 학습 성과에 미치는 영향에 관한 연구)

  • Kim, Byung-Jue;Baek, Hyeon-Gi
    • Journal of Digital Contents Society
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    • v.9 no.3
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    • pp.449-460
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    • 2008
  • The result of analysis is summarized as follows. First, the cyber home study motivation has a positive effect on the cyber home study attitude. Secondly, the cyber home study Content of Ease use has no positive effect on the cyber home study attitude. Thirdly, the cyber home study Content of Usefulness has negative effect on the cyber home study attitude. Fourth, the cyber home study Content of quality has a positive effect on the cyber home study attitude. Fifth, the cyber home study the attitude a positive effect on has result that a positive effect on learning effectiveness.

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예취빈도에 따른 무기태 질소시비가 초지의 생산성에 미치는 영향 II. 예취빈도와 질소시비에 따른 오차드그라스의 주요영양성분의 변화 ( The Effect of Minaral Nitrogen Fertilization on Grassland Production under Various Cutting Frequencies II. The changes of maj

  • 조익환;이주삼;안종호
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.14 no.4
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    • pp.257-263
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    • 1994
  • The experiment was canied out to investigate the effects of cutting frequencies (3, 4 and 5 cuts per year) in relation to fertilization of mineral nitrogen on crude protein yield and the contents of crude protein and acid detergent fibre in orchardgms(Dacty1is glomerata L.). Tne results are as follows : 1. The content of crude protein increased according to the increase in cutting frequency and showed the highest in the 1st cut in all treatments. At 4 and 5 cutting frequencies per year, the content of crude protein increased in a large extent according to the increased fertilization of mineral nitrogen. However at 3 cutting frequency, the content of cmde protein appeared higher for no application of mineral nitrogen than for the treatments with fertilization. 2. 'Ihe content of acid detergent fibre(ADF) was considerably reduced at 4 and 5 cutting frequencies and in all treatments, the lowest were recorded in the 1st cut or in the last cut. At 3, 4 and 5 cutting frequencies, the highest ADF were shown in the 2nd cut, 3rd cut and 3rd cut respectively. However, the general trend was that the content of ADF was greatly reduced according to increased level of mineral nitrogen fertilization. 3. The yeild of cmde protein was the highest at 5 cutting frequency(l.2 ton DMIha) and it indicated that the yield of cmde protein increased in accordance to the increase in fertilization of mineral nitrogen and cutting frequency. 4. In all treatments, positive correlation(p<0.001) between the yeilds of crude protein and annual dry matter yield appeared. Negative correIation(p

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Effect of regional public corporation women employee's career plateau upon subjective career success (지방공기업 여성직원의 경력정체가 주관적 경력성공에 미치는 영향)

  • Ha, Jong-Chul;Park, Hyeon-Suk
    • The Journal of Industrial Distribution & Business
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    • v.9 no.10
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    • pp.51-61
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    • 2018
  • Purpose - Korean women suffered from serious experience at unfair personnel practice in the work and coexistence between work and home affairs. The study examined woman workers' career plateau perception and success who worked for local public enterprises, that is to say, regional public corporation invested by local government, and investigated mediating effect of dual commitment as well as control effect of self-efficacy from point of view of various access to variables. Research design, data, and methodology - The study investigated women employees of regional public corporation by empirical analysis. The author collected 337 copies from 380 copies and made use of 325 copies after excluding copies with improper answer. SPSS 24.0 and AMOS 24.0 were used. Results - The study investigated effect of career plateau (structure and content) upon subjective career success (job satisfaction and career commitment) according to questionnaire material: First, not only structural plateau but also content career plateau had negative influence upon dual commitment (structure and career). Second, dual commitment had positive influence upon subjective career success from point of view of organizational commitment and career commitment. Third, structural career plateau had positive influence upon career success, and content career plateau had positive influence upon job satisfaction. Fourth, structural career plateau did not have significant influence upon job satisfaction, content career plateau and career satisfaction. Fifth, subordinate variables (organizational commitment and career commitment) had mediating influence upon career plateau cognition and subjective career success. Sixth, self efficacy did not control career plateau cognition and subjective career success. Conclusions - Women employee's career plateau cognition mediated dual commitment to have influence upon career success and to be likely to help career success theory study. Career plateau had negative influence upon dual commitment and career success of women workers. The study shall give base of counteraction from point of view of control and motivation of women workers thinking of career plateau.