• Journal of Korean Society of Forest Science
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• v.76 no.1
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• pp.11-16
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• 1987

With the purpose of pursuing the increase and decrease of chlorophyll a and chlorophyll b caused by application of the simulated acid rain treatment on Pinus koraiensis seedlings and Ligustrum obtusifolium cuttings, the experimental design of randomized block arrangement with three replications was implemented in the experimental field of Yesan National Agricultural Junior College, during the growing season of 1985. Pinus koraiensis seeds stratified in cool and moist condition were sown on pots, and in case of Ligustrum obtusifolium, C1/1 cuttings were potted for experimental use in the early spring. The regime of artificial acid rain, based upon precipitation frequency and density, was simulated from the learning of climatological data averaged from 30 years records. The spray of acid water containing pH values of 4.0 and 2.0 was initiated from the 1st of May and ended on the 31st of August. As control, ground water was also treated at the same time. To analyse the chlorophyll content, those leaves looking representative and unaffected by other harmful agents were sampled on the 18th of September, and UV-visible spectrophotometer was used. With decrease in pH values of acid rain, the content of chlorophyll a and chlorophyll b decreased in both species. The decrease in chlorophyll a could be confirmed through statistical significance, but not in chlorophyll b. And when we discussed the chlorophyll decrease index which was explained in detail in the paper, an attention might be given to similarly decreasing values in both chlorophyll a and chlorophyll b, according as pH levels of acid rain decreased. The ratios of chlorophyll a to chlorophyll b in both species were not affected by different pH leaves of acid rain.

• Journal of the Korean Society of Marine Environment & Safety
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• v.28 no.6
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• pp.853-865
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• 2022

In this study, from August to October 2019, we conducted a survey of the spatial distribution and dominant species of macrobenthos on the rocky intertidal zones of 38 specified islands distributed along the southern coast of Korea. On the basis of observation made using 50 × 50 cm quadrats, we identified a total of 80 species, among which, Mollusca were the most abundant fauna, with 54 species that accounted for 67.4% of the total, followed by Crustacea with 15 species (18.7%). The recorded numbers of Cnidaria, Porifera, and Echinodermata species ranged from 1 to 6. In terms of the regional patterns of species richness, specified islands in Yeosu were found to be the most species rich, supporting 61 species, whereas islands in Hadong, Namhae, and Chujado were found to have a similar level of species richness, ranging from 42 to 46 species. Islands in Boseong and Goheung were home to the fewest species, with only 29 species being recorded. At the sampling station scale, we noted a considerable difference in faunal richness, ranging from 6 (St. 6) to 33 (St. 20) species. Among the recorded species, Echinolittorina radiata was identified as the dominant species on 15 specified islands, with the next most abundant species being Tetraclita japonica, considered an indicator species of climate change, which was recorded on 11 islands. In terms of frequency, E. radiata, found on 36 islands, was identified as the most frequently occurring species, followed by Reishia clavigera (30 islands), Mytilisepta virgata (29), Nerita japonica (28), Ligia. exotica (27), and Littorina brevicula (26). Of the 80 species identified, 9, 4, and 2 species of Mollusca, Crustacea, and Cnidaria, respectively, are classified as Marine fauna of accepted foreign export, whereas 50 are Red List species, 44 are species of Least Concern, 3 are Data Deficient species, and 1 species was not evaluated. However, during the survey, we found no Near Threatened or Not Applicable species. On the basis of the findings of this survey, it would appear that the abundance and richness of macrobenthic fauna inhabiting the rocky intertidal zones of specified islands along the southern coast of Korea differ according to different habitat conditions, particularly with respect to the duration of exposure and the extent and properties of the substrata. The findings of this study will provide baseline data for future monitoring and management of specified islands in Korea.

• Journal of Korean Society of Occupational and Environmental Hygiene
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• v.10 no.1
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• pp.115-125
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• 2000

Three major hospitals with over 500 beds located in and near Seoul were surveyed for airbone microorganisms from February 1, 1998 to February 18, 1998. The purpose of the study was to identify and quantify microbiological organisms circulating in the air of three different areas in the hospitals. For the study, a RCS air sampler was utilized equipped with two different collection media, the agar strip GK-A for bacteria and the agar strip HS for fungi. The areas investigated were the intensive care unit (ICU) in the Department of internal medicine, the Newborns room in the Department of Obstetrics, and the microbiology laboratory. The results were as follows; 1. The average numbers of general microbiological particles collected on the agar strip GK-A media were $205CFU/m^3$, $232CFU/m^3$, and $128CFU/m^3$ in each hospitals. The highest concentration of $387CFU/m^3$ was found in the ICU of A hospital at 15:00 during the day. Further analysis of the collected bioaerosols by gram staining, revealed that there were gram positive cocci (89.5%), gram positive bacilli (7.2%), gram negative bacilli (2.8%), and fungi (0.5%), in descending order of frequency. 2. Ten different genes were identified from the agar strip GK-A. The most frequently identified organisms were: the Coagulase negative staphylococcus (55.0%), Micrococcus (21.4%), Enterococcus species(10.4%), and Bacillus species (7.2%). A series of antibiotics susceptibility test were conducted against the aforementioned four(4) organisms. Ninety percent of coagulase negative stapylococcus were sensitive to Penicillins. Pathogenic microbes isolated include: Staphylococcus aureus, Acinetobacter species, Klebsiella pneumonia, Klebsiella oxytoca, and Pseudomonas aeroginosa. 3 Although 56.8% of the microorganisms grown on the strip HS media for fungi could not be identified, some of them were successfully identified. The most frequently found fungi were Aspergillus (35.3%), Yeast or Molds (6.2%), and Penicillium (0.7%). Based on the results obtained from the study, it was concluded that some areas in the hospitals had abnormally high bioaerosol concentrations which could be attributed to human activity. Therefore, it is recommended that periodic assessments of indoor bioaerosols aiming to identify the possible sources should be conducted in order to maintain clean indoor environment in the hospitals.

• Proceedings of the KIPE Conference
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• 2009.11a
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• pp.105-110
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• 2009

The On Line Electric Vehicles(OLEV) that can pick up inductive power from underground coils on driving with high efficiency have been developed this year, and is now proposed in this paper. The IPS(Inductive Power Supply) system consists of power supply inverters, power supply rails, pick up modules, and a regulator. There are 3 generations of IPS have been developed so far, and the $4^{th}$ generation IPS is being developed. The $1^{st}$ generation has been demonstrated this Feb. 27, which is equipped with mechanically auto tracking pick-up module with 1cm air gap, and showed 80% power efficiency. The $2^{nd}$ generation IPS applied to an 120kW (average)/240kW(peak) motor powered electric bus has 17cm air gap with 72% power efficiency. For the $2^{nd}$ generation IPS, the Power supply inverter has 440V, 3phase input and 200A @ 20kHz output. The test power supply rail of 240m long is segmented by 60m each, where newly developed core structure and power cable are constructed under the road covered with asphalt of 5cm thickness. The pick-up modules which consist of core, winding wire, and rectifiers are fixed to the bottom of the bus which can carry more than 40 passengers and can pick up max. 60kW. To remove parasitic component and to transfer maximum power between them resonant circuit topology is applied to the primary and secondary sides. The EMF level is below 62.5mG at 1.75m from the center of the road to meet the regulation. Several effective ways of reducing EMF levels have been developed. In addition, effective ways to solve problems related high frequency power cables buried in ground and it's proof from soil have been studied also. This development shows that the IPS system is capable of supplying enough power to the pick-up of OLEV and can reduce battery size, weight and cost, which means the IPS with OLEV is one of the best candidate for EV.

• Korean Journal of Health Education and Promotion
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• v.3 no.1
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• pp.29-42
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• 1985

The purpose of this study was to evaluate the educatconal function of the health related articles. The health articles of the four major daily newspapers from Jan. 1st, 1980 to Dec. 31th, 1984 were used and examined for the study. Editorials were excluded. The major results were summarized as follows: 1. The total number of the health articles subjected to the study in the four major daily newspapers was 4,431. On the whole, the health articles were appeared most frequently in 1981. As for monthly distribution, the health articles were appeared most frequently on June.(9.3%). As for weekly distribution, the health articles were appeared most frequently on wednesday and saturday(50.8%). As for the subjects of content; the health articles related to the health & disease management were appeared most frequently(52.8%), but the health articles on industrial health were showed least frequently(0.6%). 2. Reviewing the chronological trend of the health articles, the frequency of appearance of the public health administration was tended to increase year by year, whereas that of enviornmental health, industrial health and population decrease relatively. As for appealing method, it was observed that the articles providing health information were steadily increasing. As for the motives of writing the health articles, there was a tendency that seasonal motive, symphosium & seminar and compaign were increasing, but motive of legislative action and administrative action were gradually decreasing. As for type of the health articles, it was observed that interpretation and research result were steadily increasing. As for the writer of the health articles, there was a tendency that writing by reporter was increasing, whereas writing by experts was decreasing. As for tone of head, the health articles written by identification statement was tended to increase. As for the appearance of photograph & cut, it was observed that the health articles excluding photograph & cut were increasing. 3. When contents were analyzed by subjects, for the purpose of providing information was used most frequently as appealing method for all subjects. As for the motive of writing, "from the interest of writers" was most frequent. As for the type of articles, interpretation type was most prevalent for the public health administration, enviornmental health, food hygrene & nutrition, population and health behavior, while contribution by experts was most frequent for the health & disease management. As for the size of articles, all subjects except the population were appeared most frequently on the column. size between 100㎠ and 199㎠.

• Journal of the Korean School Mathematics Society
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• v.5 no.2
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• pp.1-15
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• 2002

The purpose of this study came to start to be helpful in that the teachers in field produced evaluation subject about the mathematics and applied by analyzing the performance capacity for the students about the subject developed through the application of subject about the teaching-learning model that can utilize the learners' learning experience and the development of items that can evaluate it by utilizing various and concrete operational materials as an object of the first year at the middle schools. The concrete purpose of realizing it is as follows. 1. This study is to develop the teaching-learning model centered on activities adequate to utilize various and concrete operational materials. 2. This study is to develop evaluation data for utilizing the concrete operational materials by making construction through the application of developed teaching-learning model as possible. 3. This study is to present standards initiative for reliable and fair marking about the evaluation data and to analyze the students' practice capacity by using it effectively. For accomplishing the purpose of this research, this study is the work-oriented teaching and learning model using learning data that can be easily found around the surroundings and 8 evaluation programs in order that the experience-oriented learning based on circumstances learning among the learning models of constructivism. Also, it is to examine the result after applying that on a basis of 25 students, consisted of only on class in a year, in the first year at the small size of agricultural middle schools. The result of this study from this research is as follows. First, as a result of frequency survey, of response about the developed evaluation data it showed positive response more than 80% of all the items. The atmosphere of self-directed learning was produced because the developed evaluation data could induce activity-based learning naturally by stimulating the students' curiosity and promoting interest. Second, this study executed t-test for the result of questionnaire about the mathematics propensity, and there were significant differences in 19 items among 25 items. It presented that the application of data about the teaching-learning and evaluation directly using concrete operational materials to the constructional learning by level might have desirable affect on the students' mathematical propensity. It came to be a motive that could increase value recognition and interest on the subject of mathematics by investigating a mathematical principle rule and confirming it through activity learning using the concrete operational materials.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.9
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• pp.321-330
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• 2020

In this study, we analyzed the factors influencing internal marketing at hospitals on job satisfaction and customer orientation among nurses in order to provide basic data necessary for management of nursing personnel. From December 26, 2018 to January 4, 2019, the study surveyed 255 nurses at a general hospital in Gyeonggi Province. For data analysis, frequency analysis, factor analysis, correlation, and linear regression analysis were performed using the SPSS 21.0 program. First, the results of this study show that the effect of marketing inside the hospital on job satisfaction was statistically significant. Second, marketing inside hospitals was found to have a statistically significant effect on customer orientation. Thirdly, it was found that the effect of job satisfaction on customer orientation was statistically significant. Fourth, the effect of job satisfaction parameters on the relationship between marketing and customer orientation within the hospital 1st and 2nd stages appeared to have a statistically significant positive (+) impact, and three steps were found to be independent variables. The regression coefficients for organizational vision and future image, organizational attributes and systems, communication, and education/training system by sub-factors of internal marketing at hospitals significantly appeared.

• Journal of The Korean Society of Inherited Metabolic disease
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• v.5 no.1
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• pp.48-56
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• 2005

Purpose: Rett syndrome (RTT) is an X-linked dominant neurodevelopmental disorder affecting 1 per 10,000~15,000 female births worldwide. The disease-causing gene has been identified as MECP2 (methyl-CpG-binding protein). In this study, we carried out diagnostic mutational analysis of MECP2 gene in RTT patients. Methods: We analyzed four exons and putative promoter of MECP2 gene from the peripheral blood of 43 Korean patients with RTT by PCR-RFLP and direct sequencing. Results: Mutations were detected in MECP2 gene about 60.5% of patients. The mutations consisted of 14 different types including 9 missense mutations, 4 nonsense mutations and 1 frameshift mutation. Of these, three mutations (G161E, T311M, P385fsX409) were newly identified and these were determined as disease-causing mutations by PCR-RFLP and direct sequencing analysis. Most of the mutations were located within MBD (42.3%) and TRD (50%). T158M, R270X, and R306C mutations were identified with high frequency. An intronic SNP (IVS3+23C>G) was newly identified in only three of the patients. It may be a disease-related and Korea-specific SNP with RTT. The L100V and A201V have been reported to be unclassified variant and SNP. However, these mutations were not found in more than 100 normal Korean control samples. These base substitutions seem to be the disease-causing mutations in Korean RTT contrary to previous studies. Conclusion: Disease-causing mutations and polymorphisms would be very important for diagnosing of RTT in Korean. The experimental procedure used in this study might be considered for molecular biologic diagnosis used in clinical field.

• Culinary science and hospitality research
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• v.16 no.1
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• pp.92-103
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• 2010

This study aims at analyzing what influences the menu quality of Italian restaurants in major five star hotels in Seoul have on satisfaction and revisit intention. The survey was conducted from 20st June to 26th June, 2009. The statistical data of the analysis were completed using the SPSS 12.0 program, and frequency analysis, reliability analysis, factor analysis, multiple regression analysis were conducted. The results of this study were as follows. First, the most significant factor in selecting Italian restaurants was found foods taste, and the factor analysis with 45 variables of the menu quality of the Italian restaurants came up with menu factor, foods quality factor, and menu service factor. Second, among the menu quality of the Italian restaurants, menu contents and menu services were found to have a significant effect on satisfaction. Third, satisfaction was found to have a significantly positive effect on revisit intention. Fourth, menu contents were identified to have a significantly positive on revisit intention while food quality and menu services didn't have a positive one. Thus more studies should be focused on a variety of menu quality regarding Italian restaurants in the future. Based on these results, there must be continuous supervision over the menu of Italian restaurants.

• Child Health Nursing Research
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• v.7 no.1
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• pp.74-84
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• 2001

This study is the descriptive survey for the purpose of providing the basic data that establishes the strategy to promote adolescent's hope by the examining of self-esteem, academic achievement, family functioning and hope of adolescents and the investigating of the factors influencing the hope in adolescents. The subjects for this study were 456 students of the first and second year of man's senior high school that located in Seoul. The data were gathered from 16th to 31st of the October 2000. For the survey tool, it was used that the Family Assessment Device(FAD) of Epstein, Baldwin & Bishop(1983), the Self-Esteem Inventory(SEI) of Coopersmith(1975), the class record order and Hinds & Gatusso(1991)'s Hopefulness Scale for Adolescents(HSA). The collected data was analyzed by statistics methods as the descriptive and frequency analysis, t-test, ANOVA, Pearson and Spearman correlation coefficients and Stepwise multiple regression of SAS program. The results of this study were following : 1. The mean score of self-esteem of young people was 51.06±6.83 and the mean grade was 2.04. The high academic achievement was 29.2％, middle grade was 52.7％, and low grade was 18.1％. The mean score of the family functioning was 38.30±6.98 and the mean grade was 2.25. The mean score of hope was 84.26±16.45 and the mean grade was 3.51. 2. The hope in adolescents was significantly different according to their father's school career. The mean score of the group that the father's school career was below junior high school was 77.32. That was significantly lower than the mean score 84.59 of the group that the father's school career was above college and the mean score 85.18 of senior high school group(F=4.04, P= 0.0183). 3. The self-esteem was represented the positive correlation with family functioning(r=0.43) and the all of the 4 subscales(r=0.31, 0.41, 0.39, 0.30). And, it was highly ranked as much as family functioning was good. The academic achievement was represented the positive correlation with self-esteem(r= 0.15). Also, the positive correlation was shown between the affective responsiveness, role recognition and emotional support as the subscales of family functioning and academic achievement(r=0.11, 0.12). And so, academic achievement was high as much as self-esteem was high and affective responsiveness and role recognition and emotional support were good. The hope was represented positive correlation with self-esteem and academic achievement(r=0.42, 0.26), and with the whole of family functioning(r=0.15) and the 4 subscales(r=0.13, 0.16, 0.11, 0.13). So, hope was high as much as self-esteem was high, academic achievement was high and family functioning was good. 4. The influencing factors on the hope of adolescents were self-esteem(17.63％), academic achievement(3.41％), father's school career(0.84％). These factors made it possible to explain 21.88％ of hope.