• Korean Journal of Soil Science and Fertilizer
• /
• v.8 no.4
• /
• pp.177-181
• /
• 1975

The pot experiment was conducted primarily to clarify the relationship between lime application and they amount of potassium for the basal and top dressings on paddy rice. (Orizae sativa L. cultivar; variety Jinheung) The soils mixed with lime and without lime were separately filled in to 0.2827 a. open-bottom concretepots. The soil with lime was treated with slaked lime, at two weeks before transplanting to correct soil pH. around 7.0. The total amount of potassium 12 kilograms per 10a was applied by two or three split doses during transplanting, 19 days after transplanting and primodial stages. The results of experiment obtained are summarized as follows: 1. The application of potash in the rate of 4kg per 10a or less for basal dressing and the remaining amount of potash for top dressing at 19 days after transplanting and primodial stage or one top dressing, at primodial stage have increased the yield of paddy with increased number of panicles per hill, milliequivalent ratio of $K^-/Ca^{++}+Mg^{++}$ in leaves in the later stage of growth, number of ripened grains per panicle, and rate of grain maturity. 2. On the other hand, the greater the amount of potassium given for the basal dressing (over 4kilograms per 10a), the smaller number of tillers and panicles were resulted. And the tendency was considered chiefly due to high salt concentration at the early stage of rice growth.

• The Journal of the Korea Contents Association
• /
• v.19 no.1
• /
• pp.404-412
• /
• 2019

The purpose of this study is to develop the usability evaluation contents based on the needs of different stakeholder's related to the usability of the product, and to derive the design direction and apply it as the evaluation standard by applying the product design based on the results. I created a stakeholder map for a fire detector product and identified stakeholders related to usability. Based on 3 factors(Physical, cognitive, emotional) of the usability evaluation, I conducted survey on the building users and the building managers who have different requirements. There are 12 directions (ease of installation, durability, maintainability, additional functionality, effectiveness, attractiveness, visibility, consistency of information, environmental harmony, consistency, Image suitability, reliability). Through weighted analysis of three usability evaluation factors, I found factors were ranked in the same order of importance, but they were different in importance figure. Based on the results of the survey, overall product usability aspects were improved but effectiveness and environmental coordination aspects needed to be improved.

• Journal of Navigation and Port Research
• /
• v.42 no.6
• /
• pp.546-554
• /
• 2018

The Bulk market, unlike the line market, is characterized by stiff competition where certain ship or freight owners have no influence on freight rates. However, freights are subject to macroeconomic variables and economic external shock which should be considered in determining management or chartering decisions. According to the results analyzed by use of ARIMA Inventiom model, the impact of the financial crisis was found to have a very strong bearing on the BDI index. First, according to the results of the VEC model, the libor rate affects the BDI index negatively (-) while exchange rate affects the BDI index by positively (+). Secondly, according to the results of the VEC model's J ohanson test, the order ship volume affects the BDI index by negatively (-) while China's economic growth rate affects the BDI index by positively (+). This shows that the shipping company has moved away from the simple carrier and responded appropriately to changes in macroeconomic variables (economic fluctuations, interest rates and exchange rates). It is believed that the shipping companies should be more aggressive in its "trading" management strategy in order to prevent any unfortunate situation such as the Hanjin Shipping incident.

• (The) Korean Journal of Advertising
• /
• v.28 no.6
• /
• pp.35-54
• /
• 2017

The importance of utilizing an effective reward program has been emphasized as a tool for promotional strategies to acquire and retain customers. When consumers participate in a reward frequency program, they tend to focus more on points or mileage than the actual reward itself. This phenomenon is what Hsee, Yu, Zhang, and Zhang (2003) called "medium maximization." In this article, we hypopthesize that the medium effect may disappear when there is a close relationship between the product and the reward as it evokes the correlation of the two directly. The results of the current research show that the medium effect disappears in a strong relation condition while it does exist in a weak relation condition. Furthermore, we found that these results cannot be explained under an alternative "evaluability hypothesis" as Hsee, Loewenstein, Blount, and Bazerman (1999) and Hsee (1996) claimed. Even when we provided price range information as well as medium information, the medium effect still occurred. In this article, we explored boundary conditions for the medium effect and demonstrated the moderating effect of the relationship between products and rewards. Practical implications of the findings were also discussed for designing separate reward programs.

• Ecology and Resilient Infrastructure
• /
• v.8 no.1
• /
• pp.44-53
• /
• 2021

The flood prevention capacity of drainage facilities in urban areas has weakened because of the increase in impervious surface areas downtown owing to rapid urbanization as well as localized heavy rains caused by climate change. Detention can be installed in trunk sewers and linked to existing drainage facilities for the efficient drainage of runoff in various urban areas with increasing stormwater discharge and changing runoff patterns. In this study, the concept of detention in trunk sewers, which are storage facilities linked to existing sewer pipes, was applied. By selecting a virtual watershed with a different watershed shape, the relationship between the characteristic factors of detention in the trunk sewer and the design parameters was analyzed. The effect of reducing stormwater runoff according to the installation location and capacity of the reservoir was examined. The relationship between the installation location and the capacity of the detention trunk sewer in the Dowon district of the city of Yeosu, South Korea was verified. The effects of the existing water runoff reduction facility and the detention trunk sewer were also compared and analyzed. As a result of analyzing the effects of reducing internal inundation, it was found that the inundation area decreased by approximately 66.5% depending on the installation location of the detention trunk sewer. The detention trunk sewer proposed in this paper could effectively reduce internal inundation in urban areas.

• The Journal of the Convergence on Culture Technology
• /
• v.7 no.4
• /
• pp.147-153
• /
• 2021

The purpose of this study is to examine the effects of sleep pattern on regular exercise and to examine mediating effect of subjective health status in the relationship between sleep pattern and regular exercise of older people. For the purpose of the study, older people aged over 65 years old who participated in 2020 Social Survey conducted by Statistics Korea were analyzed. Multiple regression analyses were used and significance of mediating effect was examined using Sobel test for 4,567 older people. Results of the analyses showed that sleep pattern had a significant effect on regular exercise of older people. That is, having an appropriate sleep increased the possibility of doing regular exercise, so the direct effect of sleep pattern on regular exercise was found. Sleep pattern had a significant effect on subjective health status, so older people having an appropriate sleep perceive their subjective health status more positively. As for the mediating effect, subjective health status had partial mediating effects in the relationship between sleep pattern and regular exercise of older people. Results of this study show that sleep pattern of older people should be considered in intervention for improving practicing regular exercise.

• The Journal of the Korea Contents Association
• /
• v.22 no.4
• /
• pp.558-569
• /
• 2022

For a systematic analysis of the characteristics according to the counseling type, this study was about what type of counseling is the largest number of cases that three researchers participated. The main types of counseling for paid/leaved students were identified, and the characteristics of counseling types by admission type were analyzed. A total of 185 counseling cases conducted in 2018 and 2019 were analyzed by technical statistics and analysis by seven types of counseling(emotional and personality, academic motivation, learning method/strategy, family relationship, career and major choice, self-growth motivation) and analyzed to confirm the counseling needs for each student characteristic(entrance type, grade, gender, and academic changes(paid, leave of absence experience)) according to the characteristics of the students. Through this study, it was confirmed that the number of counseling was the highest in the order of "learning methods and strategies," "emotion and personality," and "self-growth motivation," and in particular, it was confirmed that the counseling rate of freshman and sophomore students was high. Most of the students who experienced paid/leave of absence were counseling on "emotional and personality" and "learning methods/ strategies." Through this study, academic-related programs are required for freshman and sophomore students, and the necessity of improving and establishing a counseling system was confirmed in consideration of the characteristics of each type of student counseling. In addition, this study proposed the necessity of institutional support such as the group mentoring system for students with academic fluctuations.

• Journal of Advanced Technology Convergence
• /
• v.1 no.1
• /
• pp.15-24
• /
• 2022

This paper tried to investigate the moderating effect of chemyon sensitivity and usage situation in the relationship between self-presentation and brand preference. Data were collected from students of universities located in Chungnam. The analysis results can be summarized as follows. First of all, the effect of self-presentation on symbolic brand preference was not significant in both public and private use situations. On the other hand, the effect of self-presentation on functional brand preference was found to be significant in both situations. Second, the main effect of chemyon sensitivity was significant only when it had a negative effect on functional brand preference in public situations, but was not significant in other cases. Third, looking at the interaction effect of self-presentation and chemyon sensitivity, the brand preference did not show significant changes in those with relatively low chemyon sensitivity, regardless of the level of self-presentation, whether in public or private situations. This study is meaningful in that it reveals that chemyon sensitivity affects brand preference through interaction with self-presentation, whether the consumption situation is public or private.

• Journal of the Korean Geotechnical Society
• /
• v.24 no.9
• /
• pp.13-21
• /
• 2008

Partitioning tracer method is a useful tool to characterize large domains of the aquifers contaminated with light nonaqueous phase liquids (LNAPLs). Sorption of the partitioning tracers to the organic matter content of soil can potentially influence the efficacy of partitioning tracer method. LNAPL-water partitioning coefficients of tracers ($K_{nw}$), measured by static method, showed linear relationship. Sorption isotherm tests were conducted to evaluate the sorption capacity of the soils packed in the columns and the results were appropriately represented by Freundlich sorption isotherm. The sorption of tracers proportionally increased with the increase of the organic matter content of the soil. Laboratory experiments were conducted in four columns each packed with soils of different organic matter contents to determine the potential interference effects of sorption to soil organic matter content and correction factors for the errors in estimation of LNAPLs by partitioning tracer method. Though there were no contaminants added, breakthrough curves from columns packed with mixture of Jumunjin standard sand and organic matter showed separation of tracers. Columns were then contaminated to residual saturation with kerosene and breakthrough curves were obtained. The results show that sorption of tracers to soil organic matter leads to an increase in the retardation factor (R) and hence, to an overestimation of the saturation of LNAPLs. A relation between the percentage of organic matter content and the corresponding percentage error in the estimation of NAPLs has been developed.

• Korean Journal of Clinical Laboratory Science
• /
• v.55 no.2
• /
• pp.105-112
• /
• 2023

Leucine-rich repeat kinase 2 (LRRK2) is known to play a crucial role in the pathophysiology of neurodegenerative disorders such as Parkinson's disease. LRRK2 is predominantly expressed in the lung as well as the brain. However, it is unclear whether LRRK2 expression correlates with the pathogenesis of lung squamous cell carcinoma (LUSC). This study analyzes the prognostic significance of LRRK2 in LUSC using the Kaplan-Meier plotter tool. High expression of LRRK2 is known to be associated with a bad prognosis in patients with LUSC. Patients with high LRRK2 expression, tumor mutational burden, high neoantigen load, and even gender correlation reportedly have the worse survival rates. In the gene expression profiling interactive analysis (GEPIA) database, the severity of pathogenesis in LUSC with high LRRK2 expression positively corresponds to a high expression of anti-inflammatory cytokines but not inflammatory cytokines. Similarly, the increased expression of interleukin (IL)10-related genes was shown to be significantly linked in LRRK2-high LUSC patients having a poor prognosis. Moreover, the tumor immune estimation resource (TIMER) database suggests that macrophages are one of the cellular sources of IL10 in LRRK2-high LUSC patients. Collectively, our results demonstrate that the postulated LRRK2-IL10 axis is a potential therapeutic target and prognostic biomarker for LUSC.