• Journal of the Korean School Mathematics Society
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• v.22 no.3
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• pp.329-350
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• 2019

Productive struggle is a student's persevering effort to understand mathematical concepts and solve challenging problems that are not easily solved, but the problem can lead to curiosity. Productive struggle is a key component of students' learning mathematics with a conceptual understanding, and supporting it in learning mathematics is one of the most effective mathematics teaching practices. In comparison to research on students' productive struggles, there is little research on preservice mathematics teachers' productive struggles. Thus, this study focused on the productive struggles that preservice mathematics teachers face in solving a non-routine mathematics problem. Polya's four-step problem-solving process was used to analyze the collected data. Examples of preservice teachers' productive struggles were analyzed in terms of each stage of the problem-solving process. The analysis showed that limited prior knowledge of the preservice teachers caused productive struggle in the stages of understanding, planning, and carrying out, and it had a significant influence on the problem-solving process overall. Moreover, preservice teachers' experiences of the pleasure of learning by going through productive struggle in solving problems encouraged them to support the use of productive struggle for effective mathematics learning for students, in the future. Therefore, the study's results are expected to help preservice teachers develop their professional expertise by taking the opportunity to engage in learning mathematics through productive struggle.

• Journal of the Korean Society for Library and Information Science
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• v.33 no.1
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• pp.129-144
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• 1999

The purpose of this research is to compare the opinions of three different groups - subject specialist librarians(group I) . students of department programs(group II) and students of college programs(group III) - as to whether these groups have a different way of thinking from each other concerning a general culture for subject specialist librarianship. Questionnaire are carried out for this research and the responses analyzed to draw a conclusion. Major findings are as follows: 1) The subject specialist librarianship to be important to all three groups and a desirable academic career of group I shows a tendency to have both B.A. degree in the subjet field and M.A. degree in library & information science, $15.3\%$ of group II and $82.9\%$ of group III appear to be belonging to either minor or double major programs, 2) the 37-45 major credits to be ideal to group I & III, and 46-55 group II, 3) a knowledge in 'Computer' and 'English' is mostly demanded to all three groups as the general culture for subject apecialist librarianship, 4) theoretical courses to be very important to group I and technical courses to group II & III, 5) the collection and access of library materials to be regarded to all three groups as an important role for future librarians.

• Journal of the Korean Society of Radiology
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• v.9 no.6
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• pp.381-392
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• 2015

The purpose of this study was to investigate factors of perception by inpatients of the Primary Health Care institutions about exposure to radioactivity at the time of radioactive examination, providing basic information for making educational materials aimed to change their perception. Most of those patients, 65.5% responded that CT was a type of radioactive examination bringing highest exposure to radiosensitivity. Most of the subjects, 56.1% said that a body part most vulnerable to exposure to radiosensitivity was the genital gland at the time of radiosensitivity examination. And most of the participants, or 26.3% responded that they obtained information about radiation from TVs or newspapers. Among the surveyed patients, men were higher in scores for factors of the perception of radiation such as recognition of radiation, harmfulness of radiation, psychological state at the time of radioactive examination, prevention of exposure to radioactivity and necessity of radiation that women were, with statistically significant differences between the two groups. These findings suggest that it is urgently needed to develop an education program which helps patients better perceive exposure to radioactivity and that radiologists should be very careful to reduce the does of that exposure. If patients better perceive radiation, they would be less anxious and less exposed to radioactivity when receiving the radioactive examination.

• Journal of the Korean Society of Radiology
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• v.10 no.7
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• pp.551-557
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• 2016

National competency standards, which are the contents of the knowledge, skills and attitudes required to perform a job in industry, is organized by the country. the job performance was evaluated based on the National competency standards from the third-year grade of radiology students by using field-based training courses. according to the evaluation results, students showed over 93% satisfactory ratio of job performance in all radiography projection methods. Therefore, it can be predicted that field-based training courses for students made a positive effect on improving their job performance. Exposure methods with CR equipment were evaluated the best rating, yet it has various problems. The standard deviation between students was very high, and the CR operation skill of students was insufficient. Film methods was evaluated also showed problems, due to the exposure condition setting and developing operation. although DR method was rated good to the students, it was evaluated that the operation skill of DR and the ancillary equipment operation skill was shortage. By supplementing the evaluation factors below proficiency levels to a course management in each exposure method, it could help students course achievement. Also, it could help students to improve job performance of clinical areas after graduation.

• Environmental and Resource Economics Review
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• v.16 no.3
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• pp.575-605
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• 2007

Korea's tidelands policy IS examined and criticized in the paper. Korea's major tidelands in the west coast might disappear within a decade. The anachronistic development IS driven by the political interest group, forming coalition for reclamation and busily fulfilling its own profits under the facade of public good and regional development. But all regions of the world have been gradually scrapping the massive reclamation projects since the 1970's and active movements to reverse the reclamation and restore the nature are on the rise. In 1978, the U.S. Supreme Court decided to suspend the construction of the dam and to protect the snail darter despite that over 100 million dollars had been injected. This court ruling became famous and caused the American public to change their perception about the environment. In the Netherlands, following a prolonged discussion on pros and cons of reclamation, open type seawall was adopted to strike a balance among the available alternatives. Japan's Ministry of Environment was praised for forming the National Wetland Committee in order to designate 20 new Ramsar sites by 2008, with an objective to reach 33 designated Ramsar sites. Away from the large-scale reclamation projects, Korea has to move towards smaller-scale projects focusing on the knowledege intensive and circular economy society that are more in harmony with the environment.

• Journal of Internet Computing and Services
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• v.17 no.3
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• pp.87-93
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• 2016

In the current information-based society, information and communication technology(ICT) is very important for an individual, a society, and a nation. Especially, for a nation, ICT-related industries are forming an important part of a nation's economy. Also, unlike other industries, ICT-related industries do not require various infrastructures, and have an advantage of being developed with a few talented persons in a short period of time. In this sense, identification and education of gifted children in IT become an essential task of a nation's future. In the past, selection of the gifted children was based on paper tests. However, paper tests incurred various side effects such as private education. Since 2013, observation-recommendation system instead of paper tests has been fully adopted. The purpose of this paper is to analyze the validity of observation-recommendation admission system of the gifted children in IT. For this research purpose, the gifted children in gifted science education center attached in a university at Seoul become the focus of the samples. Their entrance score ranking and graduation record raking are compared for analysis of validity of admission system. After statistical analysis, there is a meaningful correlation between entrance score ranking and graduation record ranking for the gifted children in IT. It means that the higher entrance score ranking, the higher graduation record ranking. The analysis results are expected to be valuable baseline data for deciding usefulness of observation-recommendation admission system.

• Journal of Internet Computing and Services
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• v.12 no.1
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• pp.55-70
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• 2011

In this paper, we propose a policy-driven RFID data management event definition language, which is possibly applicable as a partial standard for SSI (Software System Infrastructure) Part 4 (Application Interface, 24791-4) defined by ISO/IEC JTC 1/SC 31/WG 4 (RFID for Item Management). The SSI's RFID application interface part is originally defined for providing a unified interface of the RFID middleware functionality―data management, device management, device interface and security functions. However, the current specifications are too circumstantial to be understood by the application developers who used to lack the professional and technological backgrounds of the RFID middleware functionality. As an impeccable solution, we use the concept of event-constraint policy that is not only representing semantic contents of RFID domains but also providing transparencies with higher level abstractions to RFID applications, and that is able to provide a means of specifying event-constraints for filtering a huge number of raw data caught from the associated RF readers. Conclusively, we try to embody the proposed concept by newly defining an XML-based RFID event policy definition language, which is abbreviated to rXPDL. Additionally, we expect that the specification of rXPDL proposed in the paper becomes a technological basis for the domestic as well as the international standards that are able to be extensively applied to RFID and ubiquitous sensor networks.

• Journal of Internet Computing and Services
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• v.19 no.1
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• pp.141-154
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• 2018

As the sharing economic market grows, the subject of sharing is expanding to intangible resources such as time, experience, and expertise. The phenomenon that an individual temporarily participates in the platform by utilizing own intangible resources is defined as a 'gig economy'. The gig economy has a positive expectation that can create new jobs, but also has negative warnings that it is only a temporary job based on low wages. The gig economy market is growing rapidly in Korea, however there are very few academic discussions. This study examines the experiences of resource providers in the Korean gig economic platform, and then explores future job changes based on the perception of resource providers. This study selected the subject of research as a talent sharing platform and conducted in-depth interviews with 16 resource providers. The results of the research were presented through content analysis, and their experiences and perceptions were classified into six themes. This study implies academic and practical significance in exploring in depth the overall experience of resource suppliers and in suggesting proposals for desirable successful market growth.

• Journal of Hospice and Palliative Care
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• v.13 no.3
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• pp.161-168
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• 2010

Purpose: This study investigated the Korean social workers’ burn-out factors and personal traits in hospice and palliative care field, and also examined the effect and correlation between their professionality, social support and supervision. Methods: Data (N=46) from 46 social workers working at hospice and palliative care field were collected, and the data were analyzed for the inferential statistics using t-test, ANOVA, correlation and multiple regression with the SPSS 12.0 program. Results: General factors of the burn-out were age and work experience. The effect of the organization environment is greatly dependant on social support and supervision, and the burn-out were protected when workers got an emotional support from their family. For the workers with supervision, the less negative feeling, the better for the burn-out protection. Furthermore, the low burn-out was thought about when professional organization, self regulation, job vocation and autonomy were utilized. Regression analysis needed that the burn-out were protected well when individual autonomy among expertise was guaranteed. As for social support, vertical support was able to protect physical burn-out. Conclusion: The training program for social workers in hospices and palliative care field is essential to reduce and prevent the burn-out. Hospice should be more activated and a training program with up-to-date knowledge and information should be adopted.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.4
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• pp.2573-2584
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• 2015

The purpose of this study is to identify increasing needs for training students as managers in social service agencies and to suggest ways to develop the education of social welfare administration. Agency evaluations and performance management has increased demands for effectiveness and accountability of social service agencies, which also has increased the roles of managers in social service agencies. Using 'Korean Social Worker Survey' conducted by Korean Association of Social Workers, this study examines job characteristics of 2,479 social workers. The results show that administration/management activities take about 40% of social workers' daily activities. Community organization, human resource management, and planning/financial management are regarded as more important and difficult than other tasks. However, sufficient education for preparing students as social service managers is not provided in undergraduate and graduate level of college education. In addition, social workers make their life long careers as managers. Thus, the education of social welfare administration needs to refocus on the provision of knowledge and skills required for competent social service managers. This study suggests future directions for developing education of social welfare administration in undergraduate and graduate level of college education including field practice.