• 한국직업건강간호학회지
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• 제15권2호
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• pp.133-143
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• 2006

Purpose: The purpose of this study was to examine the relationship between perceived job stress and work environmental factors related with socioeconomics factors and physical burden in the golf caddies. Methods: Job stress in golf caddies was estimated by using the Karasek's job content questionnaire (JCQ) and work environmental factors were estimated by self-reported questionnaire and interview. Results: The subjects were 316 woman caddies who had never been occupationally exposed to hazardous chemicals, was mean age 31.1 years. Mean work duration was 6.44 years and working hours per day on low- and high-demand season were 6.16 and 10.51, respectively. The golf caddies displayed higher scores of job stress due to multiple factors such as working hours and frequency of rounding per week, physical burden, confliction, income satisfaction and employment stability. We found that high strain group was positive correlation with age, career, working hour (including frequency of rounding) and job demand, however, showed negative correlation with job decision latitude and support of supervisor and coworker. Conclusion: In conclusion, we suggest that the golf caddies be regard divided into high strain group as appropriate. Thus, stress management and health promotion program for golf caddies should be developed.

• 한국정보통신학회논문지
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• 제18권10호
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• pp.2443-2450
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• 2014

깊이 영상을 이용한 동작 인식 시스템에서는 효율적인 알고리즘 적용을 위하여 깊이 영상을 3차원 점군 데이터로 구성되는 실제 공간으로 변환하여 알고리즘을 적용한 후 투영공간으로 변환하여 출력한다. 하지만 변환 과정 중 반올림 오차와 적용되는 알고리즘에 의한 데이터 손실이 발생하게 된다. 본 논문에서는 3차원 점군 데이터에서 깊이 영상으로의 변환 시 반올림 오차와 영상의 크기 변화에 따른 데이터 손실이 발생하지 않는 효율적인 방법과 이를 하드웨어로 구현 하는 방법을 제안 하였다. 최종적으로 제안된 알고리즘은 OpenCV와 Window 프로그램을 사용하여 소프트웨어적으로 알고리즘을 검증하였고, Kinect를 사용하여 실시간으로 성능을 테스트하였다. 또한, Verilog-HDL을 사용하여 하드웨어 시스템을 설계하고, Xilinx Zynq-7000 FPGA 보드에 탑재하여 검증하였다.

• 정보보호학회논문지
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• 제28권6호
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• pp.1329-1342
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• 2018

최근 양자 컴퓨터에 대한 개발이 활발히 진행되면서, 기존에 널리 사용되고 있는 RSA와 타원곡선 암호 알고리즘의 안전성에 대한 문제가 제기되고 있다. 이에 대응하기 위하여 미국 표준기술연구원(NIST)은 양자 컴퓨팅 환경에서도 안전한 공개키 암호 기법에 대한 표준화 작업을 진행하고 있다. 대표적인 포스트 양자 암호(post-quantum cryptography, PQC) 기법으로는 격자기반 암호(lattice-based cryptography)가 있으며, NIST의 PQC 표준화 공모에도 다양한 격자기반 암호 기법들이 제안되었다. 이 중 EMBLEM은 기존의 LWE (learning with errors) 가정을 기반으로 하여 설계된 암호 기법들과는 달리, 더 직관적이고 효율적으로 암/복호화가 가능한 새로운 다중 비트 암호화 방법을 제안하였다. 본 논문에서는 LWR(learning with rounding) 가정을 추가적으로 사용하여 더 효율적으로 동작하는 다중 비트 암호화 기법을 제안한다. 그리고 제안하는 기법의 안전성을 증명하고, EMBLEM 및 R.EMBLEM과의 비교를 통해 효율성을 분석한다.

• 여성건강간호학회지
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• 제25권3호
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• pp.239-257
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• 2019

Purpose: To analyze the job of nursing unit managers working at women's hospital, using DACUM (developing a curriculum), DACUM is a method for analyzing job-focused competency. Methods: This study involved a descriptive survey. A DACUM workshop was held to define women's hospital nursing unit managers' role and identify their duties and tasks. For the workshop, a committee was formed consisting of 5 women's hospital nursing unit managers. Finally, after validation, the developed contents were made into a survey asking about nursing unit manager's duties and tasks. Results: Sixteen duties and 83 tasks were identified on the DACUM chart. The importance, difficulty, and frequency of the tasks were ranked in terms of A, B, and C, with A being the highest degree. Eight tasks received A's all in importance, difficulty, and frequency of performance. The 8 tasks were: 'taking over', 'taking care of seriously ill patients on handover', 'ward rounding', 'analyzing and resolving demands identified during handover and patient tour', 'reporting patient status during rounding', 'promoting breast-feeding', 'uterine contraction, and training for breast-feeding'. The duty with the biggest determinant coefficient (DC) was 'patients complaint management' (DC=7.09). Based on tasks, the one with the biggest DC was 'solving patient and patient guardian's complaints' (DC=7.53), followed by 'making infection control guidelines' (DC=7.5). Conclusion: When expanding the nursing staff of the hospital, women's hospitals nursing unit managers also need to use administrative functions as intermediaries to focus on the operation management of the entire hospital rather than direct nursing to suit their role.

• 임상간호연구
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• 제27권1호
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• pp.66-76
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• 2021

Purpose: This descriptive study aimed to explore the performance, nurses' perception, and influencing contexts of intentional rounding (IR), and to identify the factors influencing the performance of IR. Methods: 498 questionnaire responses were collected from clinical nurses with more than six months of work experiences in general wards performing IR in a general hospital. Results: The mean scores of the performance, nurses' perception, and influencing contexts of IR were 3.81(±0.68), 3.46(±0.42), and 3.79(±0.51) out of 5.00, respectively. There were significant differences in performance (F=20.51, p<.001) and nurses' perception (F=4.96, p=.001) based on the work department. There were significant differences in the influencing contexts based on age (F=6.02, p=.003) and the length of clinical experience in the ward (F=3.36, p=.010). Performance and nurses' perception(r=.42, p<.001), performance and influencing contexts (r=.46, p<.001), and nurses' perception and influencing contexts (r=.58, p<.001) showed a statistically positive correlation. Work unit (F=10.45, p<.001), nurses' perception of the benefits to patients (F=-2.46, p=.014) and to nurses (F=4.34, p<.001), and influencing contexts at the individual (F=7.77, p<.001) and department levels (F=2.99, p=.003) were found to be significant factors on the performance of IR. Conclusion: It is necessary to support the education programs and active participation of nurses in their role as leaders to raise their awareness regarding the benefits of IR. Furthermore, there is a need to adapt the IR protocol according to the unique characteristics of each unit and evaluate the effectiveness.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2002년도 춘계학술대회 논문집
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• pp.585-590
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• 2002

Abrasive water-jet(AWJ) machining is a new cutting technology. The AWJ can cut various materials touch as metal, glass and stone. However, the AWJ machining makes troubles including kerf, rounding and side taper. In this study, we investigated the correlation between parameters of abrasive water-jet machining arid cutting characteristics. The machining parameter were the material thickness and the traverse speed. The experiment was conducted to cut the stainless steel(STS41) and the mild steel(SS41) specimens. The results of the experiment weirs presented as the relation between cutting conditions and trouble of a dimension error, a conner error, an uncut width and a kerf.

• 한국공작기계학회논문집
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• 제13권3호
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• pp.1-7
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• 2004

Abrasive water-jet(AWJ) machining can cut various materials such as metal, glass and plastics. However, the AWJ machining has some troubles including kerf, rounding and side taper. In this study, we experimently investigated the correlation between the traverse speed of the abrasive water-jet and the dimensional error of the workpiece according to the thickness and the types of the material. The specimen was the stainless steel and the mild steel and the predetermined contour cutting was conducted. A comer radius error, an uncut width and a kerf were measured and evaluated.

• 한국염색가공학회지
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• 제13권5호
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• pp.58-58
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• 2001

This study surveys the fiber behavior in yarn formation and the physical properties of Solo-spun yarn. The specimens were made by six types of Solo-spun rollers with fixed twist multiplier. The physical properties such as yarn count, evenness, strength, and breaking elongation of these yarns were compared with the properties of ring spun yarns and analysed with the mechanism of Solo-spun yarn formation. The grooves on the surface of Solo-spun roller divide the web and interfere the twist propagation. These phenomena cause the uneven draft and the fly of fiber, so the Solo-spun yarn becomes finer than fing-spun yarn and the yarn breaking strength and elongation deteriorate, but these demerits can be improved with rounding the protruded edge of Solo-spun roller grooves.

• 한국염색가공학회지
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• 제13권5호
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• pp.346-352
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• 2001

This study surveys the fiber behavior in yam formation and the physical properties of Solo-spun yam. The specimens were made by six types of Solo-spun rollers with fixed twist multiplier. The physical properties such as yam count, evenness, strength, and breaking elongation of these yams were compared with the properties of ring spun yams and analysed with the mechanism of Solo-spun yarn formation. The grooves on the surface of Solo-spun roller divide the web and interfere the twist propagation. These phenomena cause the uneven draft and the fly of fiber, so the Solo-spun yam becomes finer than fing-spun yam and the yam breaking strength and elongation deteriorate, but these demerits can be improved with rounding the protruded edge of Solo-spun roller grooves.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2002년도 춘계학술대회 논문집
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• pp.984-987
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• 2002

Abrasive water-jet(AWJ) machining is a new cutting technology. The AWJ can cut various materials such as metal, glass and stone. However, the AWJ machining makes troubles including kerf, rounding and side taper. In this study, we investigated the correlation between parameters of abrasive water-jet machining and cutting characteristics. The machining parameters were the material thickness and the traverse speed. The experiment was conducted to cut the stainless steel(STS41) and the mild steel(SS41) specimens. The results of the experiment were presented as the relation between cutting conditions and troubles of a dimension error, a conner error, an uncut width and a kerf.