• 수산해양교육연구
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• 제19권2호
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• pp.310-322
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• 2007

This study is to find ways of support for beginning teacher induction in elementary school with constructing model of professional development. To achieve this purpose, this study reviewed significance of beginning teacher induction program, the bridge to life learning, and constructed the model of professional development for beginning. The final conclusion about ways of support as support intensity are orientation based on demanding of beginning teacher, bridge connection with veteran teacher, coordination of working conditions, collaboration among peer teacher, and strengthening computer network at week intensity level. At strong intensity level, the ways of support for beginning teacher are institutionalization on election and training of mentor, institutionalization on compulsory induction for 1 year, development and operation of teacher education center, and furtherance of school learning organization.

• 한국공작기계학회논문집
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• 제16권6호
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• pp.163-167
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• 2007

A field emission electron gun including 3 electrodes including one cathode and two anodes is very important for high resolution electron microscope. To have functions to control the initially-emitted electron beam, two anodes act as an electrostatic lens according to equipotential lines by adjusting the spot size, intensity, and working distance. To verify the action of the electron beam by the electrostatic lens by changing several parameters such as electrode shape, displacement and applied voltage to the electrodes, the two lenses were design and simulated and then their performances were analyzed with angular beam intensity(distribution), electrical optic axis variation and their stability.

• Current Optics and Photonics
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• 제7권6호
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• pp.708-713
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• 2023

A robust all-fiber nonlinear amplifying loop-mirror-based mode-locked femtosecond laser is demonstrated. Power-dependent nonlinear phase shift in a Sagnac loop enables stable and power-efficient mode-locking working as an artificial saturable absorber. The pump power is adjusted to achieve the lowest intensity noise for stable long-term operation. The minimum pump power for mode-locking is 180 mW, and the optimal pump power is 300 mW. The lowest integrated root-mean-square relative intensity noise of a free-running mode-locked laser is 0.009% [integration bandwidth: 1 Hz-10 MHz]. The long-term repetition-rate instability of a free-running mode-locked laser is 10^-7 over 1,000 s averaging time. The repetition-rate phase noise scaled at 10-GHz carrier is -122 dBc/Hz at 10 kHz Fourier frequency. The demonstrated method can be applied as a seed source in high-precision real-time mid-infrared molecular spectroscopy.

• Journal of Acupuncture Research
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• 제28권2호
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• pp.107-116
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• 2011

Objectives : This study was performed to investigate the effects of fixed-intensity and varied-intensity electroacupuncture on heart rate variability in healthy people with stress task. Methods : Forty healthy subjects were randomly assigned to either group A or group B or C. Group A received fixed-intensity electroacupuncture(F-EA) at $ST_{36}$ and $ST_{37}$. After 1 week wash out period to prevent overlapping residual effects, they received varied-intensity electroacupuncture(V-EA) in which the intensity was changed every two minutes based on individual heart rate variability at the same points. Group B received the treatments in reverse order. Group C received no intervention as a control group. Results : Control group showed a significant increase of LF and LF/HF during the 2nd working memory task, while both F-EA and V-EA did not. In addition, V-EA showed a significant increase of HF during 2nd rest while F-EA did not. Conclusions : These results suggest that F-EA and V-EA can inhibit sympathetic activation more than control group and that V-EA can enhance parasympathetic activation more than F-EA.

• 오토저널
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• 제5권2호
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• pp.31-40
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• 1983

A study was made of the effect of cold working and stabilizing temperature on the fatigue properties of Aluminum alloy 5083. The amount of cold working ranged from 14% to 35% and stabilizing temperature was 120.deg. C-160.deg. C. Rotary bending fatigue test was carried out, and it was found that 1) E specimen that had been cold worked by the cold reduction of 35% and stabilized at 160.deg. C for 2 hours was showed the most excellent fatigue limit and endurance ratio and, 2) By the results of the between crack propagation behavior and stress intensity factor, E specimen was showed the better resistance to fatigue crack growth than others.

• 한국치위생학회지
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• 제19권6호
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• pp.993-1001
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• 2019

Objectives: The purpose of this study was to investigate the effects of dental hygienists' recognition of sponsorship on their organizational attachment and turnover and to improve their attachment affinity according to the working environment. Methods: Dental hygienists working at dental clinics distributed 220 questionnaires from the date of approval to October 31, 2019, at the dental hygienist maintenance training site and online. Data were analyzed using the IBM SPSS Statistics 20.0 program with a significance level of 0.05. Results: Dental hygienists' perception of sponsorship, organizational attachment, and turnover intention were 2.97, 2.86, and 3.43, respectively. The turnover intention was higher when participants were unmarried, had high work intensity, a clinical career of 4-6 years, low organizational attachment, and a 53.7% explanation. Conclusions: To reduce the turnover intention, it is necessary to make appropriate compensations according to the long-term root of the experienced person, to adjust the work intensity, and to make efforts to increase the workers' attachment so that workers and organizations have the same values.

• 한국보건간호학회지
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• 제9권2호
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• pp.43-51
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• 1995

Many poeple has been engaged in industry is aware of the dangers from exposure to high intensity nose levels. The exposure to high intensity noise is encountered in a large number of situations. Laws governing the safety and health of employed people being to create a suitable working environment and eliminate unsafety practices and processes. Work areas should be designed and laid out so that they are satisfactory both from the environmental and safety points of view. In this connection safety also implies that noise is kept at a level which is not likety to cause hearing damage. This study was performed to measure the noise of press and assembly process in an automobile factory. and suggested the method of noise control. Consequently the effect ways of reducing level in working environment are as follows; 1. Changes to machines which would reduce noise generation. 2. Alteration of equipment to avoid impact in machinery and handing materials. 3. Enclosure of noisy machines or machine parts. 4. Mounting of attenuators on gas and air outlets as well as ventilation ducts. 5. Erection of sound absorbing screens. linings. and baffles in work areas. 6. The personal ear protectors can be chosen to protect the workers.

• 한국산업보건학회지
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• 제29권3호
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• pp.420-429
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• 2019

Objectives: The purpose of this study was to test the prescribed mediating effect of a sense of job oppression by considering the relationship between emotional labor and work satisfaction. Methods: This study was carried out using the data published in 2016 by the Korea Labor & Society Institute in An Investigation of Quality of Life and the Working Environment in the Service Industry. The data were collected from 638 workers at department stores. Data were analyzed using descriptive statistics, correlation, and multiple regression with Baron and Kenny steps for mediation. Results: After investigating the mediating effect of a sense of job oppression in the relationship between emotional labor and work satisfaction, it was confirmed that the effect was partially meaningful. It was also determined that the greater the intensity of their emotional labor was, the lower was their satisfaction with their working life. Additionally, the workers felt that the greater their sense of job oppression, the lower was their sense of satisfaction with work. Conclusions: In order to increase work satisfaction, it is required for guidelines for reducing job oppression and the intensity of emotional labor to be proposed or established.

• 마이크로전자및패키징학회지
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• 제26권2호
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• pp.59-64
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• 2019

본 논문에서는 근적외선 다채널 형광 영상 시스템을 소개하고, 노출시간, 작동거리, 여기광의 강도에 따른 형광 영상 시스템의 특성에 대해 분석하였다. 노출시간이 길수록, 작동거리가 짧을수록, 여기광의 강도가 강할수록 형광신호가 증가하였다. 필터의 적절한 구성과 영상 모듈의 정밀한 패키징으로 배경신호의 증가를 억제하여 SBR이 증가하는 것을 확인하였다. 본 연구의 결과를 바탕으로 다채널 형광 영상 시스템을 활용할 수 있는 방안에 대해 제안하였다.

• 한국비블리아학회지
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• 제30권3호
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• pp.93-110
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• 2019

이 연구에서는 공공도서관 사서의 업무 및 환경적 요인이 근골격계에 부담이 되며 직무만족도에도 영향을 미칠 것이라는 가정 하에 유해요인을 밝히고자 서울시 서북권역 공공도서관 사서를 대상으로 조사하여 129명으로부터 응답받았다. 조사결과 첫째, 일반사항의 특성에 따라서 보면 성별에 있어 어깨의 경우 근골격계 증상은 남자보다 여자가 높은 것으로 나타났다. 둘째, 근무환경의 특성 가운데 팔과 팔꿈치는 근무 기간에 따라 1년~3년 미만의 경우 높은 증상을 보였다. 허리는 운영방식에 따라 교육청과 지자체 위탁의 경우 높은 증상을 보였으며, 목은 근무 시간에 따라 주간이 야간 보다 높은 증상을 보였다. 셋째, 업무환경의 특성에 따라서는 손과 손목 그리고 손가락은 모든 업무환경 특성, 허리는 업무만족을 제외한 업무환경 특성 그리고 다리와 발은 숙련도 업무강도 육체적 부담에 따라 높은 증상을 보였다. 넷째, 개인의 업무만족도에 따른 근골격계 증상 차이를 보면 모든 부위가 업무만족도가 높을수록 근골격계 증상이 낮아지는 것으로 나타났다. 따라서 공공도서관 사서의 건강을 위하여 업무강도의 조정을 통한 육체적 부담을 줄일 수 있도록 하여 근무 및 업무환경을 개선하고 개인의 업무만족도를 향상 시킬 수 있도록 공공도서관 운영주체의 노력이 필요하다.