• 한국인터넷방송통신학회논문지
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• 제11권2호
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• pp.231-236
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• 2011

근래에 위치 정보를 이용하는 위치기반서비스는 많은 분야에서 이용되고 있다. 그에 따라 위치인식 기법들에 대해 많은 연구가 이루어지고 있다. 다양한 위치인식 시스템 중 TOA(Time of Arrival)이나 TDOA(Time Difference of Arrival)와 같은 시간 기반 위치인식 알고리즘을 사용하는 위치인식 시스템에서는 AWGN(Additive White Gaussian Noise)와 다중경로에 의한 왜곡이 위치인식 성능의 저하를 발생시킨다. 본 논문에서는 이런 성능 저하를 극복하기 위해서 여러 개의 펄스를 평균하는 방법으로 잡음을 제거한다. 그리고 임계값 설정을 통해 직선 경로 신호를 검출함으로써 위치인식 성능을 향상시키는 기법에 대해 연구하였다.

• 지역사회간호학회지
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• 제22권3호
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• pp.325-332
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• 2011

Purpose: This study examined the fitness of a path model on the relationship among perceived health status, self-esteem, self-efficacy, and Yangsaeng for elderly women. Methods: The subjects consisted of 633 aged women. Data were collected through self.report questionnaires. The data were analyzed with the SPSS and AMOS programs. Results: Perceived health status, self-esteem, and self-efficacy showed a direct effect on elderly women's Yangsaeng while perceived health status and self-esteem showed an indirect effect on their Yangsaeng. Perceived health status and self-esteem showed a direct effect on elderly women's self-efficacy. The hypothetical path model of elderly women's Yangsaeng was proven correct. Conclusion: These results suggest that elderly women's Yangsaeng can be enhanced by increasing their perceived health status, self-esteem and self-efficacy. Based on the outcomes of this study, it is necessary to design an intervention program that emphasizes the enhancement of perceived health status, self-esteem and self-efficacy in order to improve elderly women's Yangsaeng.

• 대한간호학회지
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• 제37권6호
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• pp.835-843
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• 2007

Purpose: This study examined the fitness of a path model on the relationship among stress, self-esteem, aggression, depression, suicidal ideation, and violent behavior for adolescents. Methods: The subjects consisted of 1,177 adolescents. Data was collected through self-report questionnaires. The data was analyzed by the SPSS and AMOS programs. Results: Stress, self-esteem, aggression, and depression showed a direct effect on suicidal ideation for adolescents, while stress, self-esteem, and aggression showed an indirect effect on suicidal ideation for adolescents. Stress, self-esteem, aggression, and suicidal ideation showed a direct effect on violent behavior for adolescents, while stress, self-esteem, aggression, and depression showed an indirect effect on violent behavior for adolescents. The modified path model of adolescent's suicidal ideation and violent behavior was proven correct. Conclusion: These results suggest that adolescent's suicidal ideation and violent behavior can be decreased by reducing stress, aggression, and depression and increasing self-esteem. Based on the outcomes of this study, it is necessary to design an intervention program that emphasizes reducing stress, aggression, and depression and increasing self-esteem in order to decrease adolescents' suicide ideation and violence.

• 근관절건강학회지
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• 제19권2호
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• pp.142-151
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• 2012

Purpose: This study was to explore the relationships among emotional labor, social support, job satisfaction, organizational commitment, and turnover intention in healthcare providers. Methods: Participants were healthcare providers (54 male and 328 female) with a mean age of 30.28 years old. Data analysis were done with PASW 18.0 for descriptive statistics and AMOS 5.0 for path analysis. Results: The hypothetical path model showed a good fit to the empirical data (${\chi}^2$=4.178, df=2, p= .124, GFI= .997, NFI= .995, NNFI= .987, RMSEA= .053). Emotional labor, job satisfaction, and organizational commitment had significant direct effects on turnover intention. Social support had a significant direct effect on emotional labor, job satisfaction and organizational commitment, and indirect and total effect on turnover intention. Conclusion: These findings suggest that turnover prevention or education programs for healthcare providers should include maintaining good mood when interact with patients or visitors with various negative moods in healthcare setting. Further strategies may need to resolve emotional labor, enhance job satisfaction and organizational commitment, and provide social support.

• 지역사회간호학회지
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• 제27권4호
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• pp.399-409
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• 2016

Purpose: The purpose of this study was to analyze factors influencing health-related quality of life (HRQoL) among male adults. Methods: Participants were 196 male adults who were recruited from June to July 2016. Seven variables related to HRQoL including age, perceived stress, physical activities, problem drinking, social support, self-esteem, depression were measured. Data were analyzed using the SPSS/WIN 20.0 program and Amos 18.0 for descriptive statistics, Pearson correlation coefficients and path analysis. Results: The mean for HRQoL was 80.14. The path analysis showed that depression had the greatest direct effect on HRQoL. It was found that perceived stress had direct and total effects on HRQoL. It also mediated the paths of social support and self-esteem to HRQoL. These factors account for 68% of the total variance, and the fit indices of the model satisfied the criteria of fitness. Conclusion: The results indicate that these factors influencing HRQoL should be considered when developing programs to improve HRQoL for male adults.

• 한국통신학회논문지
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• 제29권1A호
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• pp.99-106
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• 2004

본 논문에서는 DSSS (Direct Sequence Spread Spectrum) 수신기에서 초기동기 탐색에 사용될 수 있는 정합필터에 대해서 연구하였다. 하드웨어기술언어 (HDL)로 표현될 수 있는 단일 데이터 흐름 경로를 갖는 정합필터가 설명되었다. 필터 연산의 처리시간을 개선하기 위해 데이터의 흐름이 이중으로 표현될 수 있도록 식이 정리되고 이와 연관된 하드웨어 모델이 제시되었다. 제안된 모델은 고속 처리를 위해 병렬처리와 파이프라인을 기반으로 하고 일련의 메모리, 곱셈기, 누산기로 구성된 두 개의 데이터 흐름 경로가 평행하게 배열된 구조이다. 제안된 모델에 대해 성능을 분석하였고 단인 데이터 흐름 경로 구조의 정합필터와 비교하였다.

• 대한간호학회지
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• 제15권2호
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• pp.5-15
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• 1985

This study was conducted for the purpose of fin-ding out the variance explaining the medical facilities utilization behavior, which is defined adaptation behavior Process by focal, contextual, residual stimuli in Roy's Adaptation Model. What kinds of characteristics can explain adaptation behavior in Roy's Model? And which is the relative importance of input variables? For this analysis, stepwise multiple regression and path analysis was used. The data come from the 1981 Baseline Household Interview Survey in remote rural area. The findings of the analysis can be summarized as follows: First, Total variance of independant variables for adaptation behavior, that is medical facilities utilization including clinic, drug store, health center, herb medicine was shown 16.2 percent. The most important variable which explain the dependent variable was the occurance of illness with the Ra of value 0.112. The illness symptom, living level, regular care source was shown important variables with relatively high the R²value and significant beta coefficient. Second, in the path analysis of variables which is selected important variables, the occurance of illness was shown variable which has the highest direct effect which 0.297 path coefficient. Also the education level of household was shown variable which has the highest indirect effect through living level and the occurance of illness in causal model. Third, This analysis suggests that the occurance of illness belonging focal stimuli are more influenced than others. To sum up, It is seem to the occurance of illness, illness symptom belonging focal stimuli have high explanation ability through direct effect, education level of household among contextual stimuli have explanation ability through indirect effect.

• ETRI Journal
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• 제43권4호
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• pp.674-683
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• 2021

A trust-aware secure routing protocol (TSRP) for wireless sensor networks is proposed in this paper to defend against varieties of attacks. First, each node calculates the comprehensive trust values of its neighbors based on direct trust value, indirect trust value, volatilization factor, and residual energy to defend against black hole, selective forwarding, wormhole, hello flood, and sinkhole attacks. Second, any source node that needs to send data forwards a routing request packet to its neighbors in multi-path mode, and this continues until the sink at the end is reached. Finally, the sink finds the optimal path based on the path's comprehensive trust values, transmission distance, and hop count by analyzing the received packets. Simulation results show that TSRP has lower network latency, smaller packet loss rate, and lower average network energy consumption than ad hoc on-demand distance vector routing and trust based secure routing protocol.

• 지역사회간호학회지
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• 제29권4호
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• pp.404-413
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• 2018

Purpose: The purpose of this study is to construct and verify a path model for the influencing factors on occupational stress of Vietnamese migrant workers in Korea. Methods: Participants were 193 Vietnamese migrant workers recruited from Foreign Workers Support Centers. Data were collected by a self-administered survey with copies of a Questionnaire written in Vietnamese. Data were analyzed with descriptive statistics, Pearson's correlation coefficients and path analysis using SPSS/WIN 23.0 and Amos 20.0 program. Results: Length of residence, homeland friends' and Korean colleagues'supports, and acculturation have been found to have significant direct effects on occupational stress of Vietnamese migrant workers. Meanwhile, Length of residence, homeland friends', Korean colleagues', and their families' supports showed indirect effects on their occupational stress. What had the greatest direct effect on occupational stress of Vietnamese migrant workers was Korean colleagues' support. Conclusion: For reducing occupational stress of Vietnamese migrant workers, it is necessary to strengthen their Korean colleagues' supports in work places. In addition, community organizations should take strategies to enhance homeland friends' supports and to improve acculturation of Vietnamese migrant workers.

• ETRI Journal
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• 제26권6호
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• pp.545-554
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• 2004

In this paper, we propose an efficient design method for area optimization in a digital filter. The conventional methods to reduce the number of adders in a filter have the problem of a long critical path delay caused by the deep logic depth of the filter due to adder sharing. Furthermore, there is such a disadvantage that they use the transposed direct form (TDF) filter which needs more registers than those of the direct form (DF) filter. In this paper, we present a hybrid structure of a TDF and DF based on the flattened coefficients method so that it can reduce the number of flip-flops and full-adders without additional critical path delay. We also propose a resource sharing method and sharing-pattern searching algorithm to reduce the number of adders without deepening the logic depth. Simulation results show that the proposed structure can save the number of adders and registers by 22 and 26%, respectively, compared to the best one used in the past.