• KIEAE Journal
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• 제11권4호
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• pp.79-85
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• 2011

Landscaping on building sites has been regulated by Building Code in Korea. By Article 42 of the Code, landscaping is mandated in the process of building construction and people should comply with the code to get the building permit. On the other hand, sustainability tends to be a prime value these days. Because of the intrinsic nature of Korea Building Code, the landscaping was not adequately implemented in reality. After studies on the landscape ordinance, the major problems on the mandated landscaping has been speculated as follows: 1. As far as landscaping has been regulated by single building code, there seems to be a limitation. Urban Planning Code etc. would be another mean to adequate landscaping. 2. Speculations on landscape details associated with landscape plans are needed for building permit process. 3. By any level of law, the landscape should be reinforced for public buildings and developments because of its own publicity. 4. Locally sound landscape would be implemented through Special Architectural District etc.

• 한국미생물·생명공학회지
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• 제48권1호
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• pp.48-56
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• 2020

This study aimed to optimize the culture conditions to improve the crude biosurfactant activity of Bacillus pumilus IJ-1, using a 3³ full-factorial design of response surface methodology (RSM). It was found that submerged fermentation of B. pumilus improved the activity of the crude biosurfactant. The factors selected for optimization were NaCl concentration, temperature, and tryptone concentration. Response surface analysis revealed that the fitted quadratic model was statistically significant and produced an adequate R² value (0.9898) and a low probability value (<0.0001). The optimum level for each factor was found to be 0.567% (w/v) NaCl, 21.851℃ and 0.765% (w/v) tryptone, respectively. Crude biosurfactant activity was found to be most affected by tryptone concentration; then temperature, and finally NaCl concentration. Our results may potentially facilitate large-scale biosurfactant production from B. pumilus IJ-1.

• The Korean Journal of Ecology
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• 제9권1호
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• pp.25-31
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• 1986

A study was made on the change of vegetation in Yungil area after the erosion control works. The area was divided into three major areas, the devastated land area, the afforested area and the subclimax area. Two groups of plant, i.e., the common species in all area and the different species confined in the subclimax area, were identified by the interspecific correlation analysis based on the positive correlation value at 5% significance level. High similarity among the sites in the afforested region was indicated by the DIF (difference measure) value, lower than 0.33. However, the devastated area and the subclimax area were distinguished completely. The change in species diversity has been extremely low since the erosion control works. Robinia pseudo-acacia was the dominant species in the afforested region and showed an adequate growth status.

• 대한심미치과학회지
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• 제8권1호
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• pp.18-27
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• 1999

A tooth solely can not be an exclusive factor to attain our goal, esthetics. Other consideration, such a proportion of individual tooth, harmonized arrangement of the dentition and surrounding tissues including gingiva, lip and face should be taken into account. Esthetic gingival pattern and incisal level in the anterior area are the very important factors for esthetic restoration of the smile. We often propose adequate periodontal and prosthodontic approaches in order to improve the esthetics of the anterior area. Here, I would like to share some cases which include soft tissue management for ovate pontic placement, osteoplasty, resin filling for severe cervical caries, and bleaching approach to discolored root caused by endodontic treatment, and so on.

• Tuberculosis and Respiratory Diseases
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• 제79권4호
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• pp.234-240
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• 2016

Transmission of tuberculosis (TB) is a recognized risk to patients and healthcare workers in healthcare settings. The literature review suggests that implementation of combination control measures reduces the risk of TB transmission. Guidelines suggest a three-level hierarchy of controls including administrative, environmental, and respiratory protection. Among environmental controls, installation of ventilation systems is a priority because ventilation reduces the number of infectious particles in the air. Natural ventilation is cost-effective but depends on climatic conditions. Supplemented intervention such as air-cleaning methods including high efficiency particulate air filtration and ultraviolet germicidal irradiation should be considered in areas where adequate ventilation is difficult to achieve. Personal protective equipment including particulate respirators provides additional benefit when administrative and environmental controls cannot assure protection.

• KDI Journal of Economic Policy
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• 제38권3호
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• pp.1-15
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• 2016

Improving the quality of school education is one of the key policy concerns in Korea. This paper examines whether providing schools with adequate autonomy and incentives can meet the policy goals by looking at a recent policy reform in Korea. In 2009, the Korean government granted autonomy to certain private high schools on the condition that no financial subsidies would be provided to the schools. Because the autonomous private high schools cannot receive a subsidy, they have a strong incentive to meet parental demands because schools failing to meet these demands will lose students and will have to close. Applying the value-added model to longitudinal data at the student level, I find that students entering these autonomous schools show faster growth in their academic achievement than their peers in traditional non-autonomous schools. These results suggest that providing schools with autonomy and incentives can be a useful policy tool for improving school education.

• Annals of Clinical Neurophysiology
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• 제1권1호
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• pp.39-46
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• 1999

Transcranial doppler ultrasonography (TCD) is a new, non-invasive and easily applicable method to evaluate cerebral hemodynamics. Last 10 years, its use in Korea has been dramatically expanded, but the qualification of TCD laboratory has yet to be settled. Since duplex sonography is seldom used in Korea, we have to depend totally on TCD to evaluate cerebral hemodynamic changes. Thus, all of the available data from every detectabler cerebral arteries has to be obtained for accurate interpretation of TCD measurements. Moreover, flow direction and wave form should be concerned in addition to the flow velocity. In this article, I present technique to measure the anterior, meddle and posterior cerebral arteries, the internal carotid artery siphon and at cervical level, and the vertebral and the basilar artery, and normal values for these measurements which is essential for the adequate interpretation.

• 한국항공운항학회지
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• 제28권3호
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• pp.1-11
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• 2020

Despite the importance of Creating Shared Value(CSV), few research has been conducted to understand it. Filling in this existing void, this study was an attempt to provide a clear understanding about what triggers airline customers' decisions according to the airline company's CSV activities. Through this study, we investigated the relationship among CSV, trust, image, and loyalty. An online survey was used as a method to collect data. Through the CFA, we confirmed the adequate level of reliability and validity of the measures. The structural model was found to include an acceptable fit to the collected data. The findings from the structural analysis revealed that CSV exerted and immense on trust and image. Also, trust was significantly associated with image and loyalty while the image was highly associated with loyalty. Based on the findings presented above, implications for practitioners and researchers are stated.

• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 2000년도 THE THIRD INTERNATIONAL CONFERENCE ON AGRICULTURAL MACHINERY ENGINEERING. V.III
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• pp.632-638
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• 2000

This paper represents the characteristics of evapotranspiration rate (EVTR) and graft-taking of watermelon grafted seedlings in a graft-taking enhancement system using fluorescent lamps as artificial lighting source. Four air temperature levels of 23, 25, 27 and 29C, three humidity levels of 85, 90 and 95%R.H. and two photosynthetic photon flux (PPF) levels of 30 and 50 ${\mu}$mol m$\^$-2/ S$\^$-1/ were provided to investigate the effects of air temperature, relative humidity and light intensity on EVTR and graft-taking of grafted seedlings. EVTR of grafted seedlings increased with increasing air temperature and the passage of time after grafting. Also EVTR increased with decreasing relative humidity. As relative humidity decreased and air temperature increased, vapor pressure deficit increased and thus EVTR increased. It is required to maintain a low level vapor pressure deficit for suppressing EVTR of grafted seedlings during first 1-2 days after grafting. Therefore, less EVTR at initial stage after grafting would be adequate for smooth joining of the scion and rootstock.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2005년도 춘계학술대회논문집
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• pp.283-286
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• 2005

This study measures the levels of various receiving points for reducing deviations the floor impact sound. According to the results, 63-125Hz band appeals the large deviations. Among the spacial points, the spot of 0.75m from the wall correspond with the average of all spots. The KS stipulates that the receiving point should be off the wall more than 0.5m But obeying the rules, the large deviation appears. So, this study shows that the adequate receiving point is 0.75m from the wall.