• Journal of Educational Research in Mathematics
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• v.14 no.1
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• pp.71-88
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• 2004

The purpose of this study was to examine particular variables that play a significant role in the difficulty of math test items in College Scholastic Ability Test (CSAT). The study also aimed to develop a model of measuring the item difficulty. Variables correlated to item difficulty were drawn from the review of the related literature and the analysis of the content and difficulty of the past test items of CSAT. The first instrument was designed by using the correlated variables. According to the results of correlation analysis, the second instrument was made by deleting the variables which showed relatively low correlation with item difficulty and by refining some variables. Several models were proposed by using the revised instrument. The comparison of the R square and cross validity of each model reveals that integrated regression model was the most stable and accurate among the proposed models. The study also showed that statistically significant predictors were choice format, content domain, behavior domain, and the degree of item familiarity in the order of proportion of variance accounted by the predictors. Despite the limited scope of the present research, it can be suggested that its findings provide useful insights into predicting math test item difficulty.

• Journal of Korean Public Health Nursing
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• v.37 no.2
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• pp.247-260
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• 2023

Purpose: The purpose of this study was to gain an in-depth understanding of the characteristics and competencies of practice experienced by public health center nurses(PHNs) during the early response phase of the coronavirus disease 2019(COVID-19) pandemic. Methods: PHNs were recruited from public health centers(PHC) in ten cities in Korea, using purposive sampling. They participated in semi-structured, in-depth interviews from December 21, 2020, to February 18, 2021. The interviews were transcribed verbatim and analyzed using qualitative content analysis. Results: Three themes and nine categories were drawn from the findings. The three themes that emerged from the data analysis were as follows: 'Handling expanding work scope and overwhelming workload beyond prepared competencies, willing to go anywhere.', 'Performing tasks of cooperation and communication required in the disaster management administrative system.', 'Demonstrated proficiency in clinical nursing practices, but recognized the need for further development of leadership and administrative capabilities.' Conclusions: The experiences of the subjects' have implications for the development of content for community nursing education that cultivates basic competencies to respond to real pandemic situations during undergraduate education. It is proposed that it would be necessary to establish a support system for developing specialized competencies in public health nursing.

• Journal of Applied Biological Chemistry
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• v.60 no.1
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• pp.35-39
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• 2017

Turkey has a very rich fungal flora due to its phytogeographical position. The screening of chemical content and active substances of mushrooms becomes an important subject not only for Turkey but also for all over the world. In the last decade, Analyses on phytochemical and biological activity of fungi have gradually increased as a result of improvement in the number and quality of facilities. In the scope of the present research, four medicinal mushrooms; Morchella elata, Lactarius volemus, Cantharellus cibarius and Tricholoma terreum were analyzed for their fatty acid compositions and antioxidant capacities. The fungal species have been found with unsaturated fatty acid/saturated fatty acid ratio of 6.73 for Morchella elata, 4.12 for Lactarius volemus, 5.21 for Cantharellus cibarius, 3.73 for Tricholama terrum. In addition, the concentration of malondialdehyde which was an indicator of lipid peroxidation was also determined in these species. According to the results, free radical scavenging activity of Morchella elata and Lactarius volemus were found higher than the other species. Any of the mushroom species investigated were found having very high metal chelating activity. The results showed that the extract of Morchella elata and Lactarius volemus exhibited significant antioxidant activities. Hence, the mushrooms have a potential to be a natural antioxidant in food industries as antioxidant agent.

• The Journal of the Korean dental association
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• v.58 no.4
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• pp.222-250
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• 2020

Although museums of dentistry and dental museums are both museums related to dentistry, they may differ significantly in the scope and the content regarding the audiences. Museums of dentistry, which display a variety of dental instruments, materials, and photographs, help you learn about the development of dentistry and primarily attract a lot of attention from those who work in dental fields. These museums, however, don't get much attention from the general public. The dental museum, which displays everything related to teeth and dental care, can attract a lot of curiosity and attention not only by those in dental fields, but also by the general public. Dental museums should purpose public health education; they should not just be a place for looking around. This is because the experience of the dental museum has the power to engage people. Therefore, if you add educational functions to the dental museum and make it a place to learn about dental history and oral health care, it can be the institution where culture and health are combined. We need to study history to better understand which improvements we have made and also to see what we need to aim for in the future. The purpose of this study is to examine the actual way each of 28 dental museums in 7 different countries is operated by describing what I saw when I visited them. In addition, the current state of museums of dentistry in Korea is examined and the future development directions is also considered.

• Journal of Microbiology and Biotechnology
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• v.29 no.2
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• pp.256-267
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• 2019

The use of low-cost substrates represents one key issue to make single cell oil production sustainable. Among low-input crops, Arundo donax L. is a perennial herbaceous rhizomatous grass containing both C5 and C6 carbohydrates. The scope of the present work was to investigate and optimize the production of lipids by the oleaginous yeast Cutaneotrichosporon curvatus from undetoxified lignocellulosic hydrolysates of steam-pretreated A. donax. The growth of C. curvatus was first optimized in synthetic media, similar in terms of sugar concentration to hydrolysates, by applying the response surface methodology (RSM) analysis. Then the bioconversion of undetoxified hydrolysates was investigated. A fed-batch process for the fermentation of A. donax hydrolysates was finally implemented in a 2-L bioreactor. Under optimized conditions, the total lipid content was 64% of the dry cell weight and the lipid yield was 63% of the theoretical. The fatty acid profile of C. curvatus triglycerides contained 27% palmitic acid, 33% oleic acid and 32% linoleic acid. These results proved the potential of lipid production from A. donax, which is particularly important for their consideration as substitutes for vegetable oils in many applications such as biodiesel or bioplastics.

• Journal of Radiation Protection and Research
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• v.45 no.4
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• pp.147-153
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• 2020

Background: Malawi's 2018 National Energy Policy includes nuclear power as an energy option with an operational 100 MW targeted for 2035. Materials and Methods: This paper challenges the scope of the policy on nuclear power by reviewing its implementation strategy and comparing it to: the strategy established for coal in the same policy; some experiences from other countries; and documents by the International Atomic Energy Agency (IAEA) relating to establishing a national position on nuclear power and infrastructural requirements for a nuclear power program. Results and Discussion: It is found that the pro-nuclear position is uninformed, and targets are unrealistic owing to a lack of understanding of nature of nuclear power including the requirements for safety, security and safeguards, and nuclear infrastructure. It is apparent that neither consultation nor a proper analysis were comprehensively conducted for nuclear. Though the national energy policy suggests a national position for nuclear energy, the content does not demonstrate that the position was arrived at knowledgeably. Conclusion: Thus, nuclear power may presently be viewed as a potential energy option that is yet to be seriously considered. It is important to build an appropriate level of literacy on nuclear science and technology for policy makers, key stakeholders, and the public to be better positioned for strategizing on nuclear power.

• Journal of The Korea Institute of Healthcare Architecture
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• v.2 no.3
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• pp.71-81
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• 1996

The existing domestic and foreign elderly nursing homes, with 50 beds or more, are selected and examined according to user interview, and document analysis to understand the facts about the elderly nursing homes. The location of domestic nursing homes is limited to the region of Seoul and Kyunggi province. The scope of research is focused on the plans, area compositions, equipments and relations with public spaces - wandering paths, bathrooms and toilets. The content of research, based on the collected data discribed above, includes the search for architectural idea and the examination of typological differences among plans. The research is performed as followes. 1) description of research objectives. 2) examination of problems associated with the elderly. 3) understanding of systems and plans of domestic and foreign nursing homes. 4) performance of case study, derivation of design criteria for architectural planning, and suggestion of several adjustable alternatives for public spaces.

• Journal of the Korean housing association
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• v.25 no.2
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• pp.89-98
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• 2014

The purpose of this study was to analyze the environmental privacy on the perspective of integration and segregation of spatial areas in facilities for the elderly, through investigating required environmental privacy at each hierarchical space, the contextual situation and counterplan for the privacy. For the study, a content analysis for 35 foreign academic journal articles published from 1990 to August of 2013 was conducted. The results of the study were as follows: First, four hierarchical spaces had somewhat integrated characteristics as being required various types of privacy beyond the original features of each space. Especially semi-public and public spaces were needed the privacy similar to in private or semi-private areas. Second, the contextual situation for the privacy was mainly from undesirable access and psychological pressure of other residents, staff and etc. to the residents' personal space, stuff, and behaviors. The other was from no space (no sitting) or no equipments for privacy. Third, the counterplan for privacy was categorized as improvements of physical environments and making defensible space or keeping physical distance of the elderly. It is suggested that welfare of the aged act in Korea about the room capacity for the elderly facilities needs to be reconsidered for the privacy in their individual rooms and the privacy in semi-public and public area must be considered to make the behavior scope of the elderly extended.

• Child Health Nursing Research
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• v.16 no.4
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• pp.287-296
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• 2010

Purpose: The purpose of this study was to explore and understand life and meaning in life of elementary school students. Methods: Data from 1,790 higher grade elementary school students were analyzed for content of meaning in life. Results: The students described the following: 1) Meanings of living existence included, 'living things', 'importance', 'human life', 'family', 'event', 'eternity', 'origin of life', 'disease', and, 'protection'. 2) Four categories were found for reasons why human life is important, 'solitary', 'limitation', 'valuables', and 'living'. 3) Things that one can do to protect the value of human life were, 'doing safely', 'keep things well', 'altruistic behavior', 'doing sound activity', 'preservation & development', and 'devotion of oneself'. 4) Meaning of life included 'to accomplish plans', and 'to do things' 5) Cases when students felt life had meaning were 'perform meaningful behavior', 'comfortable emotionally', and 'receiving help from others'. 6) The methods by which to live a meaningful life were 'working diligently', 'serving', and 'doing rightly'. Conclusion: These results suggest that students recognize the meaning of life in a most positive way and with a relatively wide scope, but as a few students had a negative orientation, age-appropriate and more systematic education programs are needed.

• The Journal of Asian Finance, Economics and Business
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• v.7 no.10
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• pp.501-511
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• 2020

As more consumers are interested in sustainability issues and evaluate brands based on their social responsibility issues involved, firms are using social media platforms in order to communicate with consumers about Corporate Social Responsibility (CSR) activities. However, the current literature focuses mostly on factors drive engagement of promotional messages, while little evidence was found in the literature on how to design effective CSR messages on social media to engage consumers. Using over 3,000 branded posts on Facebook and Twitter, this research explores factors that help CSR messages become more engaging in social media. The results show that, on average, CSR messages had a negative significant effect on consumer engagement. However, CSR messages became more engaging when designed with emotional appeals, longer texts, and a hashtag. While marginal, CSR messages with informational appeals and humor undermined the effect of CSR messages on engagement. Finally, we explore different types of CSR messages by their beneficiary scope and the role of brands in the message and discuss what message contents drive more engagement in social media. This research contributes to the academic literature and managers by providing new insights on how to design CSR messages for effective communications in social media.