• Journal of the Korea Institute of Information Security & Cryptology
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• v.32 no.5
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• pp.955-963
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• 2022

The Internet of Things (IoT), combined with various technologies, is rapidly becoming an integral part of our daily life. While it is rapidly taking root in society, security considerations are relatively insufficient, making it a major target for cyber attacks. Since all devices in the IoT environment are connected to the Internet and are closely used in daily life, the damage caused by cyber attacks is also serious. Therefore, encryption communication using a network security protocol must be considered for a service in a more secure IoT environment. A representative network security protocol includes TLS (Transport Layer Protocol) defined by the IETF. This paper analyzes the performance measurement results for TLS version 1.2 and version 1.3 in an IoT device open platform environment to predict the load of TLS, a representative network security protocol, in IoT devices with limited resource characteristics. In addition, by analyzing the performance of each major cryptographic algorithm in version 1.3, we intend to present a standard for setting appropriate network security protocol properties according to IoT device specifications.

• Journal of the Korea Fashion and Costume Design Association
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• v.10 no.1
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• pp.11-23
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• 2008

니트웨어가 가지고 있는 신축성은 우븐 페브릭으로 제작한 옷과 비교했을 때, 옷을 입었을 때의 편안함과 관리의 수월함을 제공하며, 이러한 니트웨어의 특성은 현대의 라이프 스타일에 맞는 경쟁력을 가지고 있다. 현대인의 생활은 단지 일에만 치중하며 사는 것이 아니라 여행, 사회적 참여 그리고 운동 등을 하며 개개인의 삶을 더욱 중요시 여기는 형태로 변해가고 있다. 따라서 손이 많이 가고 관리하기 힘든 옷을 위해 쓰는 시간은 점점 줄어들고, 캐주얼이나 정장에 관계없이 편안하고 관리하기 쉬운 옷을 선호하며 살아가고 있다. 이러한 경향은 패션산업시장에 직접 반영되어 관리하기 쉽고 입기에 편안한 니트웨어는 패션 시장 안에서 점점 더 많은 부분을 차지하고 개발되어지고 있는 실정이다. 하지만 현재 니트웨어 시장은 니트조직을 개발하고 표현하는 데에 있어 공장의 기술자 중심으로 이루어지고 있어 제한된 스타일의 니트조직이 대부분의 시장을 차지하고 있는 실정이다. 이에 창의력을 가진 니트 디자이너와 현대인의 감수성을 만족시킬 수 있는 니트 조직의 개발은 현대 패션시장에서 매우 중요한 과제로 남아있다고 할 수 있다. 또한 CAD를 사용하는 산업용 니팅머신은 독특한 텍스추어를 가진 니트웨어의 대량 생산을 위해 꼭 필요한 아이템이라고 할 수 있다. 이러한 시대의 요구에 맞추어 연구자는 이번 연구를 통해 현재 니트웨어 시장에 나와 있는 조직과는 차별화 된 4가지 니트조직을 CAD로 디자인하고 산업용 니팅머신을 사용해 현실화하였으며, 니트웨어 디자인에 적용하여 실제의상으로 제작해 보았다. 이 연구를 통해 얻어진 결과물이 현대인의 감수성을 만족시킬 수 있는 새로운 제안으로 현재 패션시장에 받아들여졌으면 하는 바람이다.

• The Korean Journal of Health Service Management
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• v.12 no.1
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• pp.95-107
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• 2018

Objectives : This study was performed to investigate the health status and social support among elderly living alone with restricted daily functions using the data of the "2014 the Korean Elderly Survey". Methods : Data on 2,407 elderly living alone were drawn and statistically examined using a t-test, an ANOVA, and a multiple regression analysis. Results : The study found that first, the elderly living alone with restricted daily functions comprised 22.1% of the total elderly living alone, and those who were older elderly, illiterate, with low-income, having poor nutrition management, and with a poor health status. Second, among the elderly living alone with restricted daily functions, there was a group with very little support from the family and only 14.0% were covered by long-term care insurance. Third, the life satisfaction of the elderly with restricted functions was lower than that of the non-restricted elderly, and was affected by income, health conditions, depression, access to senior welfare centers, and communication with others. Conclusions : The elderly living alone with restricted daily functions have serious health risks and social support, and hence they should be provided with more proactive support for life, health care and social care to live independently within their communities.

• Korean Journal of Construction Engineering and Management
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• v.8 no.2
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• pp.59-67
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• 2007

The cost of low-income groups's housing expenses have been weighting since 2000. To solve this problem, governments encourage supplying rental apartments for them. House rental supplement is most common things to solve housing problem in an advanced country but there is neither earning rate nor assessment standards in our country. Therefore, studies on house rental supplement are required to develop this systems. Hence in this study, we try to suggest both proper house rental charge to encourage nongovernmental construction and house rental supplement, considerng ability to pay.

• Journal of Digital Contents Society
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• v.10 no.3
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• pp.469-477
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• 2009

This study is about Augmentative and Alternative Communication as handicapped people actively pursue their life. Especially, although there are many ways and devices for communicating the same as a normal person, descriptive supplementation and sustaining studies are needed for perfect communication as a normal person. The purpose of the paper is to help handicapped people who have hardships about communication. This study develops the function of Smart Workflow AAC(Augmentative and Alternative Communication) and IR sensor_based context aware function that can offer services convenient to classified handicapped people for helping them to communicate effectively. This system from an experimental basis has improved efficiency to communicate more harmoniously within individual handicapped situations to schedule management and communication of handicapped people.

• Sleep Medicine and Psychophysiology
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• v.6 no.1
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• pp.61-67
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• 1999

Objectives: The aim of this study was to examine the impact of shift work on psychological, physical and social adjustment in nurses. Methods: Two hundred ninety-nine female nurses(179 shift worker, 120 non-shift worker) filled out a questionnaire, which consisted of fifty-six items including demographic characteristics. Subjective ratings of psychological, physical, social and sleeprelated distresses were assessed with a visual analogue scale(100mm). Results: Shift work exerted significantly negative impacts on all psychological, physical, social and sleep-related variables of the shift work nurses. The subjective perception about psychological and physical health of shift work nurses was significantly negative as compared to that of non-shift work nurses. Shift work nurses complained of more shift work related social dysfunction and limited social activity. Shift work nurses were also suffering from significant sleep difficulties as compared to non-shift work nurses. Conclusions: This study suggests that shift work can exert a negative impact on psychological and physical health of nurses as it can cause disturbances of the normal circadian rhythms of the psychophysiological functions, beginning with the sleep-wake cycle. Shift work can also cause difficulties in maintaining the usual relationships both at family and social levels. These results may suggest that we need appropriate coping strategies to overcome adverse effects of shift work.

• Korean Journal of Culture and Social Issue
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• v.21 no.4
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• pp.617-647
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• 2015

The purposes of this study was to develop a valid scale measuring organization-related anxiety and to use this scale to examine the relation of organizational anxiety to demographic variables, job satisfaction and organizational committment. A series of studies were conducted to develop a scale for organizational anxiety. Initially, the 97 items were adopted by expert ratings. A exploratory factor analysis with a sample of 435 workers yielded a preliminary version of organizational anxiety scale with 28 items. Subsequently, a confirmatory factor analysis was conducted with a sample of 566 workers, leaving 20 items. The final version of the organizational anxiety scale consisted of 4 sub-factors: perception of future uncertainty, perception of locus of control, interpersonal anxiety, and perception of alternatives. In this study, the examined demographic characteristics included sex, age, type of occupation, type of industry, occupational position, monthly income and educational level. Organizational effectiveness was composed of job satisfaction and organizational commitment. As mediators, organizational culture, life satisfaction, self efficacy, and social support were explored. The negative relationship was observed between organizational anxiety and organizational effectiveness. The results showed the significant differences in organizational anxiety by demographic characteristics. The mediators were explored for the relationship between organizational anxiety and job satisfaction and between organizational anxiety and organizational commitment. The negative relationship between organizational anxiety and job satisfaction was mediated by the group culture, the developmental culture, the rational culture, life satisfaction, self-efficacy, and social support. Individuals with the higher level of these mediators reported greater job satisfaction even if they experienced organizational anxiety. The partial mediation effect of the group culture, the developmental culture, the rational culture, life satisfaction, and social support was observed on the negative relationship between organizational anxiety and organizational commitment. These results implies that job satisfaction and organizational commitment can be improved with the interventions on organizational cultures, self-efficacy, and social support despite the presence of organizational anxiety. Based on these results, the implication and limitations of this study and the directions for future research discussed.

• 한국노년학
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• v.37 no.2
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• pp.461-474
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• 2017

The purpose of this study was to develop the caregiver guideline for participation in activities daily living for the elderly with early dementia in home including easily adaptable and professional strategies as early intervetion. The process of this study was 3 stage. First stage, the development of preliminary caregiver guideline as the first stage of this study was to translate to Korean and reclassify the items about caregiver guideline for participation from reports of foreign association or government related dementia, and it consisted of 3 areas, 128 statements for questionnaire for Delphi investigation. Second stage, the guideline was to conduct the content validity, and delete, reclassify, integrate, revise inappropriate items through 2 rounds and 16 Delphi panels. Third stage, the establishment of the final version of caregiver guideline. It consisted of 8 areas: home modification and assistive device, home activities of daily living, health management, communication, psycho-emotional support, leisure activities, social participation, general strategies. All 68 items was arranged in important order. The content validity, stability, agreement index in this study were 0.81, 0.15, 0.79 respectively. When content validity, stability was above 0.49, below 0.5 in Delphi survey with 15 panels, it was not required additional survey. The result of this study meaned that it was not required to additional Delphi survey, and the result was stable and agreeable. This developed guideline was useful and practical to maintain the elderly's with dementia independent and healthy life as education materials for their caregivers, so it will expect to decrease caregiver's burden. Lastly, it stated limitation and suggestion for further study.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.7
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• pp.365-374
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• 2017

This study examined the effects of the demographic and health characteristics and chronic diseases on the health-related quality of life in service employees. From January 1, 2013 to December 31, 2014, this study analyzed the data on 607 service employees based on the 2nd data of the 6th National Health and Nutrition Examination Survey with at-test, ANOVA, and hierarchical regression analysis use of SPSS. The results of the analysis showed that the quality of Life in women was lower (${\beta}=-.074$, p=.050) than that of men, and the older the subjects were, the lower their quality of life(${\beta}=307$, p=.000). Regarding the subjective health status, there was a significant increase in the "very Poor"(${\beta}=186$, p=0.027) and "good"(${\beta}=196$, p=.001) status. The quality of life improved with increasing activity (${\beta}=-0.222$, p=0.000)). Some of the subjects perceived "high stress" (${\beta}=-0.123$, p=0.003) and the others perceived "low stress"(${\beta}=-0.176$, p=0.000). The less they perceived stress, the higher their quality of life. The factors explained 24.6％ of the health-related quality of life of the subjects. Therefore, to improve health-related quality of life of service employees, more activity opportunities should be given, the subjective health status should be positively perceived and psychological measures to decrease the level of stress should be developed.

• Journal of the HCI Society of Korea
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• v.1 no.1
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• pp.73-80
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• 2006

Mitologia is about visualizing relations of information in user-oriented method. Most information given in life has invisible relations with each other. By analyzing the common characters and relations of information, we can not only measure the importance of the information but also grasp the overall properties of the information. Especially human relations are the major concerns of social network having several visualization methodologies shown by analyzing relations of each individual in society. We applied social network theory to grasp relationships between characters in Greek mythology representing a limited society. But the current tools of social network analysis have limits that they show the information one-sided way because of the ignorance of user-oriented design. Mitologia attempts to suggest the visual structure model more effective and easy to understand in analyzing data. We extracted connections among myth characters by evaluating classes, frequencies of appearance and emotional links they have. And we raised the understanding of users with furnishing the proper interaction to the information. The initial interface offers 4 kinds of indexes helping to access character nodes easily, while zoom-in function can be used for the detailed relations. The Zoom-in is quite different from usual filtering methods. It makes the irrelative information invisible so that users can find out the characters' relation more easily and quickly. This project suggests the layout to show overall information relationships and the appropriate interactions to present detailed information at the same time.