• The Korean Journal of Financial Management
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• v.24 no.1
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• pp.59-83
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• 2007

In this paper, we test empirically free cash flows hypothesis about stock repurchase. The main results of this study can be summarized as follows. First, repurchasing firms do not experience a growth in profitability relative to their peer firms. Second, repurchasing firms experience a contraction in their investment opportunity, and so capital expenditures and cash reserves decline after the repurchase. Third, repurchasing firms experience a decline in systematic risk and investments and in their cost of capital. Fourth, the reduction in profitability and cost of capital are sources of the positive market reaction to the repurchase announcement. And the market reaction to stock repurchase announcements is stronger among those firms that are more likely to overinvest. Conclusively, these results support free cash flows hypothesis. When firms experience a decline in profitability, capital expenditures and cash reserves, systematic risk and cost of capital, they decide to repurchase stocks to reduce free cash flows.

• The Plant Pathology Journal
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• v.33 no.2
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• pp.184-192
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• 2017

Tylenchulus semipenetrans is an important and widespread plant-parasitic nematode of citrus worldwide and can cause citrus slow decline disease leading to significant reduction in tree growth and yield. Rapid and accurate detection of T. semipenetrans in soil is important for the disease forecasting and management. In this study, a loop-mediated isothermal amplification (LAMP) assay was developed to detect T. semipenetrans using DNA extracted from soil. A set of five primers was designed from the internal transcribed spacer region (ITS1) of rDNA, and was highly specific to T. semipenetrans. The LAMP reaction was performed at $63^{\circ}C$ for 60 min. The LAMP product was visualized directly in one reaction tube by adding SYBR Green I. The detection limit of the LAMP assay was $10^{-2}J2/0.5g$ of soil, which was 10 times more sensitive than conventional PCR ($10^{-1}J2/0.5g$ of soil). Examination of 24 field soil samples revealed that the LAMP assay was applicable to a range of soils infested naturally with T. semipenetrans, and the total assay time was less than 2.5 h. These results indicated that the developed LAMP assay is a simple, rapid, sensitive, specific and accurate technique for detection of T. semipenetrans in field soil, and contributes to the effective management of citrus slow decline disease.

• Journal of Korea Water Resources Association
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• v.36 no.6
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• pp.1035-1046
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• 2003

In order to evaluate the TOPMODEL's prediction ability for spatial distribution of water table depths, two major assumptions and governing equation of water table depth are tested. For the test, data of hydrological observations are used and a soil survey is made in the steep hillslope with thin soils. Responses of water table and hydraulic properties of soil are coincident with two major assumptions of the TOPMODEL's such as water table gradient parallel to the local topographical slope and exponential decline in transmissivity with depths. Soil texture and the decline rate of transmissivity(f) we homogeneous in space at the 0∼0.3m depths of the soil of the hillslope, but they are heterogeneous in space below its 0.3m depths due to the vertical change of soil texture and the ‘f’. It is shown that the TOPMODEL's equation can be used for simulating distribution of water table depth at the depths with uniform values of the 'f'.

• Fashion & Textile Research Journal
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• v.19 no.3
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• pp.289-295
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• 2017

This study aims to develop clothing sales forecast system using weather information. As the annual temperature variation affects changes in daily sales of seasonal clothes, sales period can be predicted growth, peak and decline period by changes of temperature. From this perspective, we analyzed the correlation between temperature and sales. Moving average method was applied in order to indicate long-term trend of temperature and sales changes. 7-day moving average temperature at the start/end points of the growth, peak, and decline period of S/S clothing sales was calculated as a reference temperature for sales forecast. According to the 2013 data analysis results, when 7-day moving average temperature value becomes $4^{\circ}C$ or higher, the growth period of S/S clothing sales starts. The peak period of S/S clothing sales starts at $17^{\circ}C$, up to the highest temperature. When temperature drops below $21^{\circ}C$ after the peak temperature, the decline period of S/S clothing sales is over. The reference temperature was applied to 2014 temperature data to forecast sales period. Through comparing the forecasted sales periods with the actual sales data, validity of the sales forecast system has been verified. Finally this study proposes 'clothing sales forecast system using weather information' as the method of clothing sales forecast.

• Journal of the Korean Society of Clothing and Textiles
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• v.38 no.4
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• pp.455-466
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• 2014

This study examines the effectiveness of CSR through the expectancy disconfirmation theory. The change of CSR belief after a corporate social irresponsibility (CSIR) crisis was investigated in terms of activity timing (proactive activities before CSIR crisis/reactive activities after CSIR crisis). Study 1 explores the influence of CSR belief perceptions formed through usual CSR activities on CSR belief decline after a CSIR crisis and the moderating effect of CSR activity types. Higher CSR belief perceptions are formed through usual CSR activities that result in a large CSR belief decline. The moderating effect of CSR activity types on CSR belief decline is found. Volunteer activity has the strongest depending effect on CSIR crisis. Study 2 explores the influence of CSR belief perceptions formed through CSIR crisis on a CSR belief incline after CSR activities and the moderating effect of CSR activity types. The lower CSR belief perception after CSIR crisis results in a high CSR belief incline after CSR activities. The moderating effect of CSR activity types on CSR belief incline is found. Cause-related marketing has the strongest overcoming effect on a CSIR crisis.

• Journal of the Korean association of regional geographers
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• v.9 no.4
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• pp.592-607
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• 2003

This study on land use and regeneration of urban central district in Daegu investigates the current trend of those changes, and examines the change of urban core on land use, Since the 1980s, large cities in Korea have experienced the decline of spatial economic activities as well as population. Such urban decline has a relation with land use which can be classified with urban land use district and actual land use. This study tried to capture urban land use in three aspects; downtown business, residence, and the change of land use conversion. Based on land use characteristics, the size of residence land use has played a major role in hindering of the efficiency of land use. Also, this study has reviewed urban renewal projects in Daegu, especially urban core renewal projects, and discussed the problems of the projects.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2017.11a
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• pp.61-63
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• 2017

The urban space has both aspects that the happy space that guarantees opportunity and comfort is an unfortunate space where poverty, exclusion and deportation proceed simultaneously. In other words, growth and decline are simultaneous within the city, and this phenomenon is more evident in modern society, which is getting more complicated. The harbor space is also affected by the growth and decline of the port industry directly or indirectly in the port area. However, since there is no systematic guideline for development and planning of port space in Korea, the phenomenon of the decline of the rear area, which is made up as if the harbor space has been growing and declining from past to present, is getting worse.

• The Korean Journal of Air & Space Law and Policy
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• v.14
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• pp.151-174
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• 2001

Theories of international organization have explained the creation, maintenance, and decline of international organization. However, their explanations on changes of international organization have been much more different one another. For example, the theory of hegemonic stability argues that international organization can be created and maintained only by a hegemonic state and will be declined if the hegemonic state decline. On the other hand, the functional approach believes that the positive functions and effects that international organization provides motivate states to create and maintain the organization, while the game-theoretical approach explains international organization based on cost-benefit calculation of rational states. Thus, the empirical evaluation of the arguments of the theories of international organization and defining the major factors that determine international organization are necessary not only for the development of theories of international organization but also for making desirable policies toward international organization. For the purpose, this paper compares and contrasts the three major theories of international organization and applies the approaches to the case of the International Civil Aviation Organization (ICAO) to test their arguments. Since the ICAO has been rarely examined by the theories of international organization, the case study could be desirable case to evaluate theories of international organization. In this sense, this paper attempts to define the major factors that determine the creation, maintenance, and decline of the ICAO. In particular, since the Korean government has changed its policy for air transport security system recently, it will investigate the role of ICAO on the policy change to define the limits and strength of ICAO. In conclusion, this paper will assess the relative explanatory power of each approach based on the analysis of the creation and changes of ICAO

• Journal of the Korean Institute of Rural Architecture
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• v.19 no.3
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• pp.25-32
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• 2017

This study aims to explore the direction of readjustment of rural areas, considering the community. Therefore, it classified the types of 37 Myeon units from 4 communities with higher aging index among rural communities in Jeonnam according to the degree of central functions and population and examined the residents' awareness of community space. As a result, The space used as a social activity for each type is as follows. First of all, the type of decline in the decline of the central index, which reduces transportation conditions, is welfare center (culture center). Second, the central index is high, but there is a low degree of access to the center of the middle and low levels of the population, and the local autonomous center and marketplace, respectively. Third, the low level of access to the central index and the higher center is Nonghyup. Fourth, the decline type with low center index and low accessibility to superior center and low population was the elderly community. Additionally, the types with higher center index on the awareness of community included solidarity and neighbor relationship, and those with lower center index were influenced by cooperation and community awareness for community activation.

• Journal of the Korean Society for Library and Information Science
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• v.49 no.1
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• pp.297-317
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• 2015

Although social media is recognized as a Web service that allows people to share and utilize their own opinion, experience and information, it is also faced with some problems such as indiscreet information creation and sharing, which resulted in the decline of reliability of information. This research statistically analyzed the effect of social media on information sharing. As a result, social media is an efficient information tool that can support information sharing and allow people to get feedback from other people. It also brought a positive effect on the entire information behavior. In contrast, it still has weaknesses in the utilization of information, including the decline of information reliability and excessive creation of inaccurate information. Eventually, social media is an information tool that can support the diversification of information and also incurs the decline of reliability of information.