• BMB Reports
• /
• v.37 no.4
• /
• pp.422-428
• /
• 2004

Raw-starch-digesting $\alpha$-amylase (Amyl III) was purified to an electrophoretically pure state from the extract of a koji culture of Aspergillus awamori KT-11 using wheat bran in the medium. The purified Amyl III digested not only soluble starch but also raw corn starch. The major products from the raw starch using Amyl III were maltotriose and maltose, although a small amount of glucose was produced. Amyl III acted on all raw starch granules that it has been tested on. However, it was considered that the action mode of the Amyl III on starch granules was different from that of glucoamylase judging from the observation of granules under a scanning electron microscope before and after enzyme reaction, and also from the reaction products. Glucoamylase (GA I) was also isolated and it was purified to an electrophoretically pure state from the extract. It was found that the electron micrographic features of the granules after treatment with the enzymes were quite different. A synergistic effect of Amyl III and GA I was observed for the digestion of raw starch granules.

• Journal of Wetlands Research
• /
• v.26 no.1
• /
• pp.10-20
• /
• 2024

The conservation and restoration of wetlands are essential tasks for the sustainable development of human society and the environment, providing vital benefits such as biodiversity maintenance, natural disaster mitigation, and climate change alleviation. This study aims to analyze the strategic interactions and interests among various stakeholders using game theory and to provide significant grounds for policy decisions related to wetland restoration and development. In this study, hypothetical scenarios were set up for three types of cities: large, medium, and small. Stakeholders such as governments, development companies, environmental groups, and local residents were identified. Strategic options for each stakeholder were developed, and a payoff matrix was established through discussions among wetland ecology experts. Subsequently, non-cooperative game theory was applied to analyze Nash equilibria and Pareto efficiency. In large cities, strategies of 'Wetland Conservation' and 'Eco-Friendly Development' were found beneficial for all stakeholders. In medium cities, various strategies were identified, while in small cities, 'Eco-Friendly Development' emerged as the optimal solution for all parties involved. The Pareto efficiency analysis revealed how the optimal solutions for wetland management could vary across different city types. The study highlighted the importance of wetland conservation, eco-friendly development, and wetland restoration projects for each city type. Accordingly, policymakers should establish regulations and incentives that harmonize environmental protection and urban development and consider programs that promote community participation. Understanding the roles and strategies of stakeholders and the advantages and disadvantages of each strategy is crucial for making more effective policy decisions.

• Journal of the Korean Institute of Rural Architecture
• /
• v.25 no.1
• /
• pp.25-34
• /
• 2023

In 2018, the Cultural Heritage Administration of Korea introduced a new system that registers national cultural heritage in street and district units. Yeongju City's Modern Historical and Cultural District was selected as the first trial region. This grouping method breaks through conservation and utilization limitations of cultural heritage in individual building units. Thus, the issue is how will such historical and cultural spaces be grouped, conserved and managed. Hence, this study identifies the current situation of buildings in the Modern Historical and Cultural Street of Yeongju and conducts an experimental survey. Based on this, the types of modern architecture were classified, and the architectural groups were extracted and categorized to preserve and utilize the architecture. For these purposes, priority groups were determined by evaluating them based on five criteria: archetype, placeness, politicalness, typicality and originality. The modern architecture in the Modern Historical and Cultural Street of Yeongju have undergone many changes. The residential transformation of small and medium-sized cities during modern times can be understood as a process of settlement and nativization.

• Journal of the Korean Institute of Rural Architecture
• /
• v.26 no.2
• /
• pp.27-36
• /
• 2024

Many houses have been left vacant in cities worldwide due to changes in the economy, society, and urban composition. The increase in vacant houses causes social problems and decrease in the value of real estate. Considering the cost of preparing a new residence because the existing residence no longer functions, it is an important problem to solve empty houses in the existing residence. Accordingly, policy attempts and studies to reduce and utilize vacant houses are in progress in various countries. In South Korea, the ratio of vacant houses was 6.4% of all houses as of 2021, and in Jeolla-buk-do, it was 11.6%, which is higher than the national average. Jeollabuk-do conducted a fact-finding survey on countermeasures against vacant houses; 17,732 vacant houses (2.4%) were surveyed. The urbanization, population, and terrain of Jeollabuk-do, consisting of 14 cities and counties, were considered. The ratios, types, grades, and spatial autocorrelations of vacant houses were analyzed after classification into city areas (focus, small, and medium) and county areas (plains and mountains) areas to derive policies according to the distribution of vacant houses. The average difference in ratio, type, grade, and spatial autocorrelation of vacant houses was used to analyze the characteristics of the distribution of vacant houses according to these classifications. There were significant differences in the averages of the ratios, grades, and spatial autocorrelations between city and county areas. The autocorrelation of vacant house distribution exhibited differences between urban and county areas.

• Journal of the Korean housing association
• /
• v.14 no.2
• /
• pp.19-30
• /
• 2003

The purpose of this study is to investigate the actual usefulness and consciousness of bathrooms and to clarify the preference of bathroom plans by apartments dwellers in Jeonju City. Data was collected through self-administered questionnaires and 343 apartments dwellers were used for this study. The major results are as follows. The bathroom types were mostly unit bathrooms and were not suited with using bathrooms of apartments dwellers. The unit type of bathroom was not comfortable for them and most of them were not satisfied with their bathrooms. They usually used family bathroom instead of private bathroom. They wanted a separate space for different facilities such as a bathtub and toilet, a dressing room, and a fixed clothes chest. Generally apartments dwellers did not prefer unit bathrooms, prefering instead the bathroom plan with separate rooms for the bathroom and toilet, with space for dressing. This study suggests that further studies be conducted on apartments dwellers in other big, small and medium-sized cities. Also, it is necessary to offer bathroom plans which take the size of houses and bathrooms, and the number of bathrooms into account and to survey housing consumers' satisfaction of those bathroom plans.

• Journal of the Korean housing association
• /
• v.14 no.6
• /
• pp.115-124
• /
• 2003

The purpose of this study is to investigate the actual usefulness of bathrooms and to clarify the preference of bathroom plans by college students in Jeonju City. Data was collected through self-administered questionnaires and 315 college students were used for this study. The major results are as follows. The bathroom types were mostly unit bathrooms and were not suited with using bathrooms of college students. The college students usually used unit bathrooms individually for stool and showering. The unit type of bathroom was not comfortable for them and, therefore, most of them were not satisfied with their bathrooms. They wanted a separate space for different facilities such as a bathtub and toilet, a dressing room, and a fixed clothes chest. Generally the college students did not prefer unit bathrooms, but the bathroom plan with separate rooms for the bathroom and toilet, with space for dressing. This study suggests that further studies be conducted on college students in other big, small and medium-sized cities. Also, it is necessary to offer bathroom plans which take the size of houses and bathrooms, and the number of bathrooms into account and to survey housing consumers' satisfaction of those bathroom plans.

• Journal of the Korea Safety Management & Science
• /
• v.20 no.2
• /
• pp.45-53
• /
• 2018

The purpose of this study is to examine the mediating effect of the organizational trust, acceptance of organizational change on the relationship between job characteristics and organizational commitment. For this study, data were collected from convenient sample of 241 employees at small and medium enterprises in Ulsan city and Gyeongju city. All data collected from the survey were analyzed using with SPSS 18.0 and AMOS 18.0. This study reports findings as followed: 1. The relationship between the job characteristics and the organizational trust is positively related. 2. There was a positive correlation between the job characteristics and the acceptance of organizational change. 3. There was a positive correlation between the job characteristics and the organizational commitment. 4. The relationship between the organizational trust and the acceptance of organizational change is positively related. 5. There was a positive correlation between the organizational trust and the organizational commitment. 6. There was a positive correlation between the acceptance of organizational change and the organizational commitment. Finally, the organizational trust and acceptance of organizational change played as a partial mediator on the relationship between job characteristics and organizational commitment.

• The Journal of Asian Finance, Economics and Business
• /
• v.8 no.5
• /
• pp.1031-1038
• /
• 2021

The purpose of this study is to evaluate the impact of organizational culture on job satisfaction and organizational commitment among employees in small and medium-sized enterprises in Ho Chi Minh City, Vietnam. The study hypothesized that organizational culture has a significant influence on employees' satisfaction and that satisfaction also significantly impactsorganizational commitment among employees. The data are collected from a sample of 240 office employees. Structural Equation Modeling is used to determine the influence of organizational culture dimensions,including open working environment, salary, and rewards, empowerment, management style, corporate values, on employees' satisfaction and organizational commitment. The findings showed that the five dimensions of organizational culture positively impact employees' satisfaction and that job satisfaction significantly influences organizational commitment. Thus, job satisfaction serves as the bridge between organizational culture and commitment. The current study contributes to providing a practical insight into the relationships between organizational culture, employees' job satisfaction, and organizational commitment. Based on that, managers can develop suitable personnel policies for their organizations to simultaneously enhance employees' performance and satisfaction, which makes them stay with the company.

• Journal of Distribution Science
• /
• v.20 no.11
• /
• pp.109-120
• /
• 2022

Purpose: We would like to identify the appropriate size of stores in the commercial district suitable for the era of low growth. In addition, it is intended to present alternatives to prevent gentrification along with measures to revitalize commercial districts according to the selection of appropriate stores. Research design, data and methodology: The importance and commercial district usage patterns were identified through surveys by consumers and sellers. the demand and size of the commercial area were calculated based on the floating population and resident registration population. In addition, based on this, through metric analysis, the importance of the business district activation plan and what important matters can prevent gentrification were analyzed. Result: In this the study, 555 stores are currently operating in the target area, but it is seen as a commercial district with a scale that can operate 136 stores and 938 stores. In addition, it was analyzed that the Commercial Lease Protection Act needs to be strengthened to prevent gentrification. Conclusions: Due to the nature of small and medium-sized cities in Korea, commercial districts that have once lost their resilience must take much effort to find vitality. It is believed that local commercial districts will have resilience when diagnosis and recovery measures are adequately presented.

• Journal of Korean Society of Rural Planning
• /
• v.26 no.4
• /
• pp.107-116
• /
• 2020

The purpose of this study is to analyze the characteristics of the 11 southeastern states in the United States by using regional characteristics variables and to classify the regions. First, 19 variables from four categories of population, society, industry-economy and urban service were selected and factor analysis were conducted, and the result showed five major factors of population, economic condition, job and commuting. Based on the following factor scores, a cluster analysis was conducted, and eight types of big city, medium-sized city, bed town, small town, urban hinterland, retirement town, and rural village were derived. These types of spatial distribution characteristics showed big cities were by different types of regions and they formed metropolitan areas. Each types of classified regions were located along the road network with hierarchy. The study focused on cases in the southeastern regions of the United States and can be used as a comparison with Korean cases. If the same research method is applied to Korea in the future, or if the time series of changes is tracked by analyzing different time points, it will greatly help identify the characteristics of urban and rural mixed areas.