• Food Science and Industry
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• v.53 no.1
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• pp.33-42
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• 2020

In accordance with the recent trend of environmentally friendly agricultural policy, product registration of agricultural chitosan among the organic materials has been displayed in various forms such as soil improving agent, crop growth, and pest control. Chitin production industry is expected to bring competitiveness by producing low-quality and low-cost chitin for agriculture, rather than high-quality and high-cost for food, medical products. Since there are various soil microorganisms that can decompose chitin and chitosan in farm soil where crops are produced, it can be applied usefully to agricultural sites suitably for crop growth and pest control using chitin and chitosan as substrates. The purpose of this study is to compare and analyze the registration status of organic materials companies using chitin and chitosan raw materials in the organic materials information system of the NAQS, and to provide an opportunity to further expand the agricultural use of domestic chitin and chitosan.

• The Journal of the Korean Institute of Forest Recreation
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• v.22 no.4
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• pp.35-48
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• 2018

This research was carried out to provide a good quality forest healing program as a basic source of development by researching the general characteristics of users of Geiji Mountain in North Jeolla Province, the recognition of forest healing and regional preference programs. As a result of the survey, Geigisan Mountain is used as a natural place for recreation and leisure of residents of Jeonju. The most important factors in the selection of forest healing programs for visitors were the activities, organization and chronology of the program, and the main purpose was to improve health. Week-by-week programs utilizing weekends were preferred for management of forest healing programs. It was revealed that sports programs prefer to enjoy natural scenery, forest experience programs, healing programs, forest therapy programs, meditation programs, and listening to forest music. The outcome of this study is expected to be used as a basic source for developing and researching a program for forest healing in the area of Mt. Meanwhile, the limit on the composition of suitable forest healing programs according to preference is required for continuous and continuous integrated study of the forest healing program for the future of the forest healing program.

• Journal of Legislation Research
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• no.41
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• pp.7-42
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• 2011

The social welfare law concerning the children, the elderly and the disabled has been sufficiently in the center of the discussion in the academic as well as practical arena. One can find however rarely academic proposals about the way of understanding, spheres affiliated with this legal system, and systematic characteristics. So these problems stay now vague. This article aims to approach to these points of issue. First, it tries to reveal the physical, psychological and psychic characteristics of these group of people. These situation are not to be effectively protected by norms and measures provided by other instruments of social security, i.e. social insurances and social assistances. Second, based upon these functional limits inherent to these instruments of social security the own system of the social welfare law is explored in this article. The discussing points are as follows; 1. the concept of social welfare law, 2. as core principles; realization of the personality and freedom based upon self-determination right, universalism and equality. 3. rearrangements of the legal provisions to bring harmony with the legal purpose and function of social welfare law. Finally, it is pointed that the evaluation of the relevant legislation is essential, since in this area the difference between the norm purpose and the reality could be immense.

• (The) Korean Journal of Educational Psychology
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• v.32 no.1
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• pp.1-27
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• 2018

The proposes of this study were to develop the learning consulting model based on creative problem solving and to verify the effects of its implementation. The model was developed based on ADDIE program developing model. In the analysis stage, literature review and needs survey were conducted for data collection on learning consulting at universities including the literature in related fields. Specific areas needed in the learning consulting model were selected from the results of this collected data. During the design and development stage, the learning consulting processes were established. These constituted the learning consulting model developed and it had been based on the Creative Problem Solving. To verify the validity of the learning consulting model based on the creative problem solving, a pilot study was implemented. The model was completed content a validity verification process performed by experts through focus group interviews. The aim this final model is to improve the self-directed learning ability and creative problem solving capacity of the university students. The study results showed that mean scores on self-directed learning ability of the experimental group increased significantly compared to the control group. Based on these findings, the learning consulting model seemed very effective in improving the university students' self-directed learning ability, as well as their creative problem solving capacity. Based on the results of this study, implications and limitations of the final model and its implementation were discussed.

• 한국노년학
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• v.36 no.4
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• pp.981-1001
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• 2016

At old age, as people depend on superficial clues when they interpret the overall context of communication, their ability to understand connotative and figurative words and articles could deteriorate. In this study, 50 normal young(junior) people and normal old(senior) people were made to perform a task to understand similes, metaphors, idioms, and proverbs, the sub-areas of figurative language. For the task, participants were made to understand a paragraph consisting of several sentences and select a correct answer representing appropriate figurative language. As a result of the analysis, first, old people showed a lower level of performance than young people in all the sub-areas of figurative language. Second, in understanding idiomatic words and proverbs, old people showed a lower level of performance due to unfamiliarity. Third, for the types of wrong answers, old people mostly understood only the literal meanings in all the sub-areas of figurative language. Due to aging, old people come to have a lowered level of the pragmatic language ability, reasoning ability, and inhibiting ability to efficiently communicate with others considering certain situations and contexts. Thus, old people could have difficulties in understanding inner meanings from others in daily communication.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.19 no.5
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• pp.35-44
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• 2009

To protect sensitive personal information, data will be stored in encrypted form. However in order to retrieve these encrypted data without decryption, there need efficient search methods to enable the retrieval of the encrypted data. Until now, a number of searchable encryption schemes have been proposed but these schemes are not suitable when dynamic users who have the permission to access the data share the encrypted data. Since, in previous searchable encryption schemes, only specific user who is the data owner in symmetric key settings or has the secret key corresponding to the public key for the encrypted data in asymmetric key settings can access to the encrypted data. To solve this problem, Stephen S. Yau et al. firstly proposed the controlled privacy preserving keyword search scheme which can control the search capabilities of users according to access policies of the data provider. However, this scheme has the problem that the privacy of the data retrievers can be breached. In this paper, we firstly analyze the weakness of Stephen S. Yau et al.'s scheme and propose privacy preserving keyword search with access control. Our proposed scheme preserves the privacy of data retrievers.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.15 no.6
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• pp.13-25
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• 2005

In these days, there are various uses of Linux such as small embedded systems, routers, and huge servers, because Linux gives several advantages to system developers by allowing to use the open source code of the Linux kernel. On the other hand, the open source nature of the Linux kernel gives a bad influence on system security. If someone wants to exploit Linux-based systems, the attacker can easily do it by finding vulnerabilities of their Linux kernel sources. There are many kinds of existing methods for lading source-level vulnerabilities of softwares, but they are not suitable for finding source-level vulnerabilities of the Linux kernel which has an enormous amount of source code. In this paper, we propose the Onion mechanism as a methodology of finding source-level vulnerabilities of Linux kernel variables. The Onion mechanism is made up of two steps. The Int step is to select variables that may be vulnerable by using pattern matching mechanism and the second step is to inspect vulnerability of each selected variable by constructing and analyzing the system call trees. We also evaluate our proposed methodology by applying it to two well-known source-level vulnerabilities.

• Korean Journal of Construction Engineering and Management
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• v.22 no.4
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• pp.3-10
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• 2021

According to the IPCC, humans are influencing the climate system. Such changes in the climate system can cause problems in the supply of food ingredients in the agricultural field by changing the existing growing environment. To solve this problem, vertical farms can be a good alternative for a stable supply of food ingredients. Although the vertical smart farm pays close attention to maintaining and managing the growing environment of crops, it is difficult to uniformly implement temperature, humidity, illumination, oxygen, and carbon dioxide concentrations in the building space. As a result of conducting computational fluid dynamics analysis to ensure air uniformity, a remarkable result is that it is advantageous to continuously spray suitable carbon dioxide CO2 concentrations for a long period of time for air uniformity in a vertical smart farm. Through this result, it is possible to efficiently plan a growing environment system optimized for a vertical smart farm. Based on this study, if efficient crops are produced by creating an optimized growing environment for vertical smart farms, it will be able to contribute to the development of the agricultural field.

• The Journal of the Korea Contents Association
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• v.21 no.6
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• pp.791-803
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• 2021

To improve the oral health level of North Korean defectors, it is necessary to improve awareness of oral health care along with treatment of oral diseases. The purpose of this study is to develop an oral health education program that can be applied to North Korean defectors who have settled in local communities. To develop the program, three steps were taken: literature review, in-depth interview with experts, and program development applying the Dick&Carey model. As a result of in-depth expert interviews, what should be considered in oral health education for North Korean defectors is the need to understand North Korean defectors in advance, to familiarize themselves with the daily language of North Korea, to develop a synchronization strategy suitable for North Korean defectors, and to connect with whole body health. It was found that there was a need to establish the contents of education and to seek realistic education methods that reflect the characteristics of local communities. As a result of developing the program, fifty learning goals were developed, and ten sessions were planned. The oral health education program for North Korean defectors developed in this study will be of practical help to dental hygienists planning oral health education for North Korean defectors in the future and North Korean defectors.

• Applied Chemistry for Engineering
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• v.32 no.3
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• pp.305-311
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• 2021

Effects of chitosan as a mesopore directing agent of SAPO-34 catalysts were investigated to improve the catalytic lifetime in DTO reaction. The synthesized catalysts were characterized by XRD, SEM, N₂ adsorption-desorption isotherm and NH₃-temperature programmed desorption (TPD). The modified SAPO-34 catalysts prepared by varying the added amount of chitosan showed the same cubic morphology and chabazite structure as the conventional SAPO-34 catalyst. As the added amount of chitosan increased to 3 wt%, the surface area, mesopore volume and concentration of weak acid sites of modified SAPO-34 catalysts increased. The modified SAPO-34 catalysts showed enhanced catalytic lifetime and high selectivity for light olefins in the DTO reaction. In particular, the SAPO-CHI 3 catalyst (3 wt%) exhibited the longest catalytic lifetime than that of the conventional SAPO-34. Therefore, it was confirmed that chitosan was a suitable material as a mesopore directing agent to delay deactivation of the SAPO-34 catalyst.