• Journal of the Korean Chemical Society
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• v.63 no.5
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• pp.323-326
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• 2019

• The Korean Journal of Soil Zoology
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• v.3 no.1
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• pp.9-16
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• 1998

Effects of temperature, pH, and salt concentration on the preservation of the infective juvenile entolopathogenic nematodes, Steinernema carpocapsae, were analyzed. The effects of acclimation to sublethal low temperature and glycerol concentrations on rapid cold hardening of the nematodes were also evaluated to set up the conditions for their cryopreservation. All tested environmental factors could change the storage effectiveness of the nematodes. These analyses indicated that the optinal storage condition for the nematodes consisted of $15^{\circ}C$, pH 8.5, and 0.5-1.0% salt concentration. The nematodes showed a rapid could hardening in response to $5^{\circ}C$ for 2h. Glycerol induced the nematodes to increase the cold hardiness. Its high concentration over 10%, however, gave a harmful effect on the nematode survival.

• The Korean Journal of Soil Zoology
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• v.2 no.1
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• pp.41-58
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• 1997

According to the related references, up to now the systematic studies on the ants from Mt. Moak have not been professionally surveyed yet. On order to classify the the ants from Mt. Moak, authors had collected the ants in this area from Octorber, 1993 to June, 1995. Examining all the collections, 44 species of 23 genera of 17 tribes under 3 subfamilies were identified.

• The Korean Journal of Soil Zoology
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• v.2 no.2
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• pp.115-128
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• 1997

At the Mt. Mirok, Chonbug, Korea, ants have been collected from May, 1992 to April, 1998. Examining all the collections, they were classified as 25 species, 21 genera of 13 tribes under 3 sufamilies.

• Proceedings of the Korea Water Resources Association Conference
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• 2022.05a
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• pp.123-123
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• 2022

자연유역 내에 도시가 자리잡고 발달해 나가면 유역의 특성에 급격한 변화를 가져온다. 이러한 변화로 인해 도시유역은 자연유역과는 상이한 수문학적 특성을 나타낸다. 그 동안 도시수문학의 주된 관심사는 도심지 홍수예방, 상수관망 등에 주어졌고, 장기적인 관점에서 도시유역의 물순환에 대한 정량화는 별로 다루어지지 않았다. 이 연구에서는 비교적 최근에 급격하게 도시화가 이루어진 탄천 유역에 대해 도시유역의 장기적인 물순환에 대해 정량화하고 자연유역과의 차이를 분석하고자 한다. 강수량, 유출량, 증발산량, 상수공급량, 하수처리량 등의 가용한 자료를 동원하여 탄천 유역의 물수지 분석을 수행하였다. 탄천유역은 유역 외부에서 상수를 공급받고 사용된 용수는 하수처리시설을 통해 하천으로 방류되고 있으며 이로 인해 유출 특성이 자연유역과 많은 차이를 보이고 있다.

• Journal of Haehwa Medicine
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• v.6 no.1
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• pp.515-538
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• 1997

• Proceedings of the Korean Institute of Landscape Architecture Conference
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• 2023.04a
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• pp.41-42
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• 2023

• Journal of Wetlands Research
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• v.11 no.3
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• pp.21-35
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• 2009

To propose a sound direction for river rehabilitation plan, the naturalness of the river must be evaluated. In this study, the conventional methods for evaluating the naturalness of rivers proposed by Park, et al. has been improved to estimate the weights for each items subject to assessment and applied adequate Analytic Hierarchy Process (AHP). To estimate the weights, survey was conducted on a group of 83 experts in Civil and Environmental Engineering with a customized questionnaire. The results of the survey were generalized and used to estimate the weights of each items. Among the 14 evaluation items that have been generated as a result of the estimation, a total of 7 weight values such as water quality, variations in water flow, vegetation around minor bed, curve of waterway, vegetation around flood plain, variety in minor bed width, and diversity of stream bed materials appeared to be high. The improved method for evaluating the naturalness of rivers was applied to Hoe-ya River, where the method has successfully discriminated the sections having low degree of naturalness. The proposed assessment method can be employed as a criterion to determine the business zones in the river environment maintenance projects.

• Communications of Mathematical Education
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• v.26 no.2
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• pp.205-220
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• 2012

In this article convergent sequences with natural number terms are investigated and the behaviors of tails and limits of these natural number sequences are explored. Firstly this study showed how the pre-service teachers response to the intuitive limit definition using "getting closer" for constant sequences. As a case of convergent natural sequences, the sequences in which the latter term is determined by the sum of digit squares of the former term are considered. To exploring these sequences the computational and charting capabilities of spreadsheets are utilized and some mathematical findings are obtained. Spreadsheet can be instrumentalized by teachers or students to provide a laboratory-like environment to explore a mathematical problem.

• Journal of Convergence for Information Technology
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• v.10 no.2
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• pp.146-153
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• 2020

This study is a fusion study combining service marketing in the field of Naturopathy and business administration to examine the impact of the quality of Naturopathy services on the loyalty of customers using it, and see if the service value and customer satisfaction are mediated between the two variables. Through these efforts, the government wanted to contribute to the basic provision of research on Naturopathy services and the development of related industries. For the purpose of the study, a range commonly used as Naturopathy was presented to those in their 20s to 50s nationwide, and a survey was conducted on the relevant experience. Data analysis uses the AMOS 24.0 program to identify the causal relationship between the variables and the statistical program SPSS 24.0. The study found that the quality of the Naturopathy service had a positive effect on the loyalty of the customers who used the service, and that the value of the service and customer satisfaction were mediated between the service quality and loyalty, and had a positive effect.