• Child Health Nursing Research
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• 제21권3호
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• pp.261-271
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• 2015

Purpose: This study was done to identify the meaning and substantial nature of NICU practice among nursing students by applying a research method based on hermeneutic phenomenology in an attempt to lay a foundation for enhancing theoretical and practical child nursing education. Methods: The participants were eight nursing student who had experience in clinical practicing in NICU. In-depth interviews were performed from April to December, 2014 until data were fully saturated. Collected data were analyzed using Colaizzi's method. Results: Seven theme clusters were extracted from fourteen themes. The seven theme clusters of the nursing students' clinical practice experience in NICU were: 1) Excitement about the clinical practice setting 2) Afraid of practice environment 3) Babies have priority over clinical practice 4) Comparing with adult nursing clinical practice 5) Feeling pity for babies and their parents 6) New awareness about the role of nurses 7) Demands of enhancing clinical practice. Conclusion: The results of the study provide useful information in understanding nursing students' practice experience in NICU and establishing effective strategies to support these nursing students.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2005년도 봄학술 발표회 논문집(II)
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• pp.469-472
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• 2005

With all ensuring the fire resistance structure as a method of setting the required cover thickness to fire, the RC is significantly affected from the standpoint of its structural stability that the compressive strength and elastic modulus is reduced by fire. Normally, the degradation of concrete member exposed to fire is largely dependent on the fire scale and fire condition. There is therefore a need to precisely predict the deterioration and fire damage of the exposed member. Thus, this work estimated the temperature distribution inside a member taking into consideration of the thermal properties by means of finite element method(FEM). The estimation results in a little higher prediction value than the experimental value in surface layer and is almost coincident with the experiment as the heating depth increase. From this work it can be known that the simulation application of FEM using the thermal properties of concrete member in high temperature gives rise to the confident prediction in the prediction of temperature distribution.

• 대한간호학회지
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• 제33권1호
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• pp.17-25
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• 2003

Purpose: The purpose of this study was to identified the male nurses' encounter in adapting themselves in the hospital settings dominated by the female nurses in number. Method: Data were collected through the in-depth interview of 16 male nurses and analysed through the grounded theory methodology. Result: The behaviors of have made tremendous for job-adaptation can be summarized as a series of struggles to consolidate their own ground. They have made tremendous efforts to hold their own ground in the nursing profession composed of a large numbers of female nurses, while they have experienced many difficulties and problems as minorities. They have struggled to adapt themselves professionally through efforts such as; challenging the social and professional barriers, identifying the job identity, empowering themselves through self-development and dedication, expanding their influence among colleagues. In spite of these efforts, they had the perception that nursing is not a lifelong occupation for them. Thus, they had tendency to find outlets of change to occupations. Conclusion: A specific strategy is needed to provide an environment that is helpful for males in integrating into and adapting to the nursing profession.

• 한국세라믹학회지
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• 제44권11호
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• pp.633-638
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• 2007

The setting time of alkali activated slag cement tends to be much faster than ordinary Portland cement, and its compressive strength had been higher from the 1 day but became lower than that of the cement on the 28 days. According to the results of the surface observation, weight loss, compressed strength, and erosion depth tests on the sulphuric acid solution. It has been drawn that alkali activated slag cement has a higher sulphate resistance than ordinary Portland cement, and in particular, the alkali activated slag cement added 5 wt% alumina cement has little deterioration on the sulphuric acid solution. The reason why the alkali activated slag cement has higher sulphate resistance than other hardened cement pastes is that it has no $Ca(OH)_2$ reactive to sulphate ion, and there is little $CaSO_4{\cdot}2H_2O$ production causing volume expansion, unlike other pastes. And it is supposed that $Al(OH)_3$ hydrates with high sulphate resistance, which is produced by adding the alumina cement increases the sulfate resistance.

• 대한조선학회지
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• 제21권3호
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• pp.43-50
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• 1984

A body form, which experiences minimum vertical wave-exciting forces in the vicinity of a prescribed wave frequency in water of finite depth, is obtained by an approximate method. Its configuration has the symmetry with respect to the vertical axis, expressed in terms of exponential functions. By distributing three-dimensional pulsating sources and dipoles on the immersed surface of the body, a velocity potential is determined and subsequently hydrodynamic forces including the 2nd-order time-mean drift forces are calculated. The dynamic behavior of the body moored in irregular waves is investigated numerically by using central difference method. Hereby irregular wave trains are simulated with examining its repeatability by comparing the resulting spectrum with original one. Numerical results indicated that the body form obtained from the present analysis possesses in general a favorable hydrodynamic characteristics in comparison with a spherical buoy and that the maximum excursion of the body can be significantly reduced by setting pre-tension of an appropriate amount in the mooring cable.

• 동서간호학연구지
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• 제19권2호
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• pp.138-149
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• 2013

Purpose: The purpose of this study is to understand experience of self-esteem by exploring and describing the clinical nurses' lived experiences. Methods: The qualitative research method of phenomenology was utilized in this study. In-depth personal interviews of 8 clinical nurses with more than three years of experience in the clinical setting were conducted using a records from October, 2012 to March, 2013. Results: Content analysis was done using the Colaizzi' phenomenological method. The results based on the data analysis, 19 descriptive statements and 7 themes were confirmed. The 7 themes were as followed; 'recognition of nurse's role', 'recognition of nursing as a profession', 'secure jobs', 'close relationship with the clients', 'sense of existence perceived by others', 'considerations between coworkers', and 'opportunity for self-improvement. Conclusion: This study may be helpful to understand the experience of self-esteem. The results can be used to develop the effective interventions for the improvement of nurse's self-esteem.

• 한국건축시공학회지
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• 제4권1호
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• pp.133-140
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• 2004

This study is intended to investigate the properties of bleeding reduction of concrete using AE water reducing agent for the type of bleeding reduction with the replacement admixture. According to the results, when the adding ratio of AE water reducing agent for the type of bleeding reduction increases, a range of normal fluidity and aimed air content are satisfied, setting time is faster than that of normal AE water reducing agent. And bleeding amount decreases, bleeding speed is highest between 60 and 90 min, and sinking depth increases drastically in 50 min. When AE oater reducing agent for the type of bleeding reduction is added, compressive strength shows a slight variation by air content, but there is not a large influence by addition of AE water reducing agent for the type of bleeding reduction. Synthetically, it proves that AE water reducing agent for the type of bleeding reduction satisfies aimed air content in the range of normal slump and can reduce only bleeding without quality variation of compressive strength.

• 한국해안해양공학회지
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• 제19권1호
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• pp.1-15
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• 2007

서해연안역의 폭풍해일고 산정을 위한 초기 연구 단계로, 8 node 병렬 리눅스 클러스터의 효율성과 함께 황해 조석 모의결과의 신뢰성을 검토하였다. NPB 벤치마크 결과 7배에 이르는 계산 효율의 성능향상을 보였다. pADCIRC 모델을 이용한 황해 조석재현 결과는 선행된 연구들과 비교하여 만족스런 신뢰성을 나타냈다. 모델 변수 선정에 따른 영향을 살펴본 바에 따르면, 우리나라 서해연안과 같은 천해역의 조석수동역학 해석에는 수심에 따른 바닥마찰계수의 적절한 사용이 필수적인 것으로 분석되었다.

• Journal of Power Electronics
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• 제18권1호
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• pp.45-55
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• 2018

It is usually difficult for dual-active-bridge (DAB) dc-dc converters to operate efficiently at light loads. This paper presents an in-depth analysis of a DAB with triple-phase-shift (TPS) control under the light load condition to overcome this problem. A kind of operating mode which is suitable for light load operation is analyzed in this paper. First, an analysis of the zero-voltage-switching (ZVS) constraints for the DAB converter has been carried out and a reasonable dead-band setting method has been proposed. Secondly, the basic operating characteristics of the converter are analyzed. Third, under the condition of satisfying the ZVS constraints, both the reactive power and the root mean square (RMS) value of the current are simultaneously minimized and a particle swarm optimization (PSO) algorithm is employed to analyze and solve this optimization problem. Lastly, both simulations and experiments are carried out to verify the effectiveness of the proposed method. The experimental results show that the converter can effectively achieve ZVS and improved efficiency.

• 한국어교육
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• 제28권1호
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• pp.221-250
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• 2017

This study aims to discuss the basic foundations to set levels and language skills for developing a Korean Proficiency Test for young and adolescent learners. Recently, there has been an increase in demand regarding young and adolescent learners from multicultural and overseas backgrounds. However, the current Korean Proficiency Test lacks the appropriate means to determine the Korean proficiency of young and adolescent learners with general purposes of language learning. Therefore, there is an urgent need for developing a specialized and new form of language assessment for young and adolescent learners who are exposed to a foreign language or a second language learning environment. The study examines and analyzes cases of foreign language examinations for young & adolescent learners; furthermore, the objectives and target were set based on the results of a needs analysis and in-depth interviews conducted among teachers and education officials in overseas Korean Hangeul Schools, international schools, elementary and secondary schools. Finally, the levels and language skills appropriate for the objectives of a proficiency test and target learners have been suggested.