• The Journal of Korean Academy of Orthopedic Manual Physical Therapy
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• v.25 no.2
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• pp.11-20
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• 2019

Background: The purpose of this study was to investigate the immediate effect of thoracic self mobilization on balance and gait of acute stroke patients. Methods: Patients (n=10) with acute stroke applied to thoracic self mobilization. There are two thoracic self mobilization of both extension and rotation. Each thoracic self mobilization was performed ten times per direction in a total of three sets and the total time required for two thoracic self mobilization was twenty minutes. The break time between sets was one minute. Balance ability was measured using the timed up and go test and the five times sit to stand test for patients. The 10 meter walk test and the functional gait assessment were used for measurement of gait ability for patients. Results: Significant improvements were observed on balance ability (p<.05) and gait ability (p<.05). Conclusion: These results show that thoracic self mobilization is immediate effective on balance and gait ability. Thus, thoracic self mobilization will help recovery of balance and gait ability in acute stroke patients.

• Journal of Ocean Engineering and Technology
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• v.35 no.3
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• pp.183-190
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• 2021

Tomographic particle image velocimetry (PIV) is a widely used method that measures a three-dimensional (3D) flow field by reconstructing camera images into voxel images. In 3D measurements, the setting and calibration of the camera's mapping function significantly impact the obtained results. In this study, a camera self-calibration technique is applied to tomographic PIV to reduce the occurrence of errors arising from such functions. The measured 3D particles are superimposed on the image to create a disparity map. Camera self-calibration is performed by reflecting the error of the disparity map to the center value of the particles. Vortex ring synthetic images are generated and the developed algorithm is applied. The optimal result is obtained by applying self-calibration once when the center error is less than 1 pixel and by applying self-calibration 2-3 times when it was more than 1 pixel; the maximum recovery ratio is 96%. Further self-correlation did not improve the results. The algorithm is evaluated by performing an actual rotational flow experiment, and the optimal result was obtained when self-calibration was applied once, as shown in the virtual image result. Therefore, the developed algorithm is expected to be utilized for the performance improvement of 3D flow measurements.

• Health Policy and Management
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• v.32 no.2
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• pp.180-189
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• 2022

Background: Social support contributes directly and indirectly to maintaining physical, mental, and social well-being. The aim of the study was to identify the impact of social support on self-rated health among Korean industrial accident workers. Methods: This study used data from the panel study of workers' compensation insurance (PSWCI). The final subjects were 2,759 workers who responded to a 2018 to 2020 PSWCI. Social support was defined as social contact with friends, neighbors, family, and social participation activities like religious activity, social activity, and club activity. Multivariate logistic regression analysis was performed to investigate causal relationships between social support and self-rated health using a generalized estimating equation model. Results: Proportion of workers' good self-rated health steadily increased (2018: n=1,447, 63.2%; 2019: n=1,542, 66.2%; 2020: n=1,653, 67.3%). Higher levels of social contacts with friend (worse: reference; same: β=0.442) and higher levels of social activity (yes: reference; no: β=-0.173) were especially associated with good self-rated health. Conclusion: This study confirmed social support positively influenced self-rated health among the self-rated health of industrial injured workers. The results of this study suggested that recovery policies that the government served should include programs enhancing social support for improving health among industrial injured workers.

• Smart Structures and Systems
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• v.6 no.9
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• pp.1041-1056
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• 2010

This paper investigates the possibility of a strategy for an automatic full recover of a structural component undergoing loading-unloading (fatigue) cycles: full recover means here that no replacement is required at the end of the mission. The goal is to obtain a material capable of self healing earlier before the damage becomes irreversible. Attention is focused on metallic materials, and in particular on shape memory alloys, for which the recovering policy just relies on thermal treatments. The results of several fatigue tests are first reported to acquire a deep understanding of the physical process. Then, for cycles of constant amplitude, the self-healing objective is achieved by mounting, on the structural component of interest, a suitable microcontroller. Its input, from suitable sensors, covers the current stress and strain in the alloy. The microcontroller elaborates from the input the value of a decisional parameter and activates the thermal process when a threshold is overcome.

• Transactions of the Korean Society of Mechanical Engineers
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• v.10 no.3
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• pp.292-297
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• 1986

Measurements of internal stress .sigma.$_{i}$, anelastic strain .epsilon.$_{A}$ and recovery rate .gamma. were made in steady state creep of 2024 Al alloys over a wide range of stresses at temperatures between 260.deg. C and 380.deg. C, for the purpose of investigating the relations among the three parameters. Values of .sigma.$_{i}$ were obtained by the method of strain transient dip test, and those of .epsilon.$_{A}$ and .gamma. were determined from the results of sudden stress removal or reduction tests. As a main result, it is thought that the anelastic behavior and recovery process are basically dependent on same deformation mechanisms.sms.sms.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.11 no.3
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• pp.53-62
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• 2001

In this paper, we study the security of key recovery enhanced key exchange protocol. We present a subliminal channel of self-escrowed Diffie-Hellman key exchange protocol proposed by P. Paillier and M. Yung in ICISC\`99, and also we present a method to prevent such a subliminal channel. In addition, we review and analyze the weakness of the modified key recovery enhanced key exchange Protocol proposed by C. Kim and p. Lee in PKC 2001.

• Women's Health Nursing
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• v.5 no.3
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• pp.410-419
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• 1999

This study sought to figure out women's functional status after childbirth under the Sanhujori. Functioal status was defined as the women's readiness to assume infant care responsibilities and resume her usual activities including household, social and community, self-care and occupational activity. A convenience sample of 211 women who are in the postpartal period of the range from 1 week to 3 months above and residing in Seoul. Korea was studied from January, 1997 to December, 1998 for two years. Mean age of respondents was 29.9 years and mean of the present postpartal period was 7.5 weeks. The present postpartal period was of 5-8 weeks 26.5%, 3-4weeks 26.1%, 9-12 week 23.7% and below 2 weeks 7.1%, 32.7% of women had a job and the mean period of return to job was 2.76 weeks. During Sanhujori the non professional care giver was family members from women's maiden home 73.5% and only 2% of husband. The period women needed for the recovery from now was 5.39 weeks and it means that women need 12.9weeks for recovery after childbirth. For the present subjective health status after childbirth, bad was 20.2%, good 18.3 and average 61.5% and for the recovery status, completely recovered 29.5%, slightly 61.8% and rarely 8.7%. The mean of functional status at the 7.5weeks was baby care activity 3.65, household 2.57, self-care 2.46, occupational 2.44 and social 1.53 in rank. Except baby care the functional status was generally low or very low. The related factors to the functional status were the period and subjective evaluation of Sanhujori women experienced, the present period of postpartum, and subjective feeling of recovery. This result strongly reflects the effects of Sanhujori culture and Sanhujori per se on women's postpartal life including functional status and reconfirmed the relationship between health status and the experience of Sanhujori after delivery as the previous findings from various study showed. It provides a challenge to the professional care givers to research further on the effects of Sanhujori on the health status, health recovery after abortion or delivery from the various aspects through the cross-sectional and longitudinal research for the refinement of the reality of Sanhujori not only as cultural phenomenon but as an inseparable factor influencing in women's postpartal healthy adaptation and for the appropriateness of intervention and quality of care for desirable health outcome.

• The Journal of the Korea Contents Association
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• v.19 no.5
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• pp.306-315
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• 2019

The purpose of this study was to analyze empirically influential factors related to the recovery of people with a mental disorder and also the moderating effects of family resilience. For this purpose, the investigator developed a research model that took into consideration both the positive and negative elements of individual and social factors based on the ecological, psychological, social, and ecosystem perspectives in previous studies and checked their causal effects and the moderating effects of family resilience in statistical significance. The subjects include 112 clients at an institution for people with a mental disorder. Data was collected with an interview based on a structured questionnaire. Collected data was put to the multiple regression analysis. The analysis results show that there was statistical significance in self-esteem, social stigma, and social support excluding symptoms and that the moderating effects of family resilience had positive(+) synergistic effects only on self-esteem and social support. Based on these results, the study made proposals about practice strategies including the establishment of internal and external support systems to make an effective approach to recovery and the systemization of family resilience and supportive strategies to promote the smooth recovery of people with a mental disorder through the reinforcement of programs related to the confirmed positive elements of self-esteem and social support.

• Journal of the Korea Convergence Society
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• v.7 no.2
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• pp.85-91
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• 2016

This study is related with support system plans of public-private convergence for emergency recovery services to fire victims. The current issues are analysed from the condition and problem analysis results of emergency recovery activities for fire victims. And building plans of an integrated support system based on the government and private sector cooperation are proposed. Overall, the system shows that the government is responsible for the functionality of management and supervision for the system operation, and the private is responsible for the functionality of specialized agencies for practical emergency recovery. Consequently, support system plans include with infrastructure maintenance of laws and regulations, contracting-out of the support system, stable supply of operating budget and function strengthening of public-private convergence for emergency recovery. Especially, plan for stable supply of operating budget in detail including with establishment of the fund and self-financing composition of private corporations for emergency recovery services is proposed. The results of this study will lead strengthening of fire safety welfare and social safety nets at future.

• Research in Community and Public Health Nursing
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• v.29 no.2
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• pp.143-154
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• 2018

Purpose: The purpose of this study is to identify the effects of job demand and recovery experience from job stress on job embeddedness among workers in the service industry. Methods: The participants were 223 workers from the service industry in P and Y Cities with the help of a structured self-report questionnaire, administered between July 10 and August 20, 2017. The data were analyzed using descriptive statistics, t-test, ANOVA, $Scheff{\acute{e}}$ test, Pearson correlation coefficients and stepwise multiple regression. Results: There were significant differences in job embeddedness in terms of satisfaction with salary, continuous service, perceived stress level and the perceived health status of the subjects. There were significant positive correlations between role clarification in job demands (r=.55), recovery experience from job stress (r=.27) and job embeddedness. From the multiple regression analysis, the most significant factors affecting job embeddedness were found to be role clarification in job demands (${\beta}=.47$), recovery experience from job stress (${\beta}=.23$), and perceived stress level (${\beta}=.18$). These variables explain 34.0 % of the total variance in job embeddedness. Conclusion: In order to increase job embeddedness among workers in the service industry, it is necessary to prepare measures to increase recovery experience from job stress and to decrease role clarificationin job demand, and perceived stress level.