• 농업과학연구
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• 제41권3호
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• pp.169-175
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• 2014

Objective of this study was to investigate effects of pre-processing method and number of sampling leaves on stability of the reflectance measurement for Chinese cabbage and kale leaves. Chinese cabbage and kale were transplanted and cultivated in a plant factory. Leaf samples of the kale and cabbage were collected at 4 weeks after transplanting of the seedlings. Spectra data were collected with an UV/VIS/NIR spectrometer in the wavelength region from 190 to 1130 nm. All leaves (mature and young leaves) were measured on 9 and 12 points in the blade part in the upper area for kale and cabbage leaves, respectively. To reduce the spectral noise, the raw spectral data were preprocessed by different methods: i) moving average, ii) Savitzky-Golay filter, iii) local regression using weighted linear least squares and a $1^{st}$ degree polynomial model (lowess), iv) local regression using weighted linear least squares and a $2^{nd}$ degree polynomial model (loess), v) a robust version of 'lowess', vi) a robust version of 'loess', with 7, 11, 15 smoothing points. Effects of number of sampling leaves were investigated by reflectance difference (RD) and cross-correlation (CC) methods. Results indicated that the contribution of the spectral data collected at 4 sampling leaves were good for both of the crops for reflectance measurement that does not change stability of measurement much. Furthermore, moving average method with 11 smoothing points was believed to provide reliable pre-processed data for further analysis.

• 한국의료질향상학회지
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• 제7권1호
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• pp.6-17
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• 2000

Background : This study was attempted to provide a basic information necessary for the development of measures evaluating perceived discomfort of the patients under local anesthesia and the developments of nursing intervention and nursing standard. Method : The study subjects were a convenience sample of 100 surgical patients under local anesthesia. The researcher visited the patients directly and explained the purpose of the study to them. Then they were asked to fill out questionnaires which were developed and structured by the researcher, under their prior permission. Out patient's data were collected at recovery room after operation. Results : Factor analysis on measures evaluating the patients under local anesthesia showed that the measures consisted of eight factors including "explanation", "humane treatment", "motion limitation", "pain", "no togetherness", "waiting", "the environment of operating room", and "unkindness". When analyzing each of the factors regarding their degree of contribution to perceived discomfort, it was found that "waiting" was highest in terms of the degree. According to general chara-cteristics of the sampled patients, the factor of "explanation" contributed to perceived discomfort more in male patients than female ones. Regarding parts of medical examination, the patients of otorhinolaryngology felt perceived discomfort most because of the factor of "pain". Conclusion : To relieve perceived discomfort the patients under local anesthesia require providing individually systematized nursing services which can reduce perceived discomfort according to each of the factors. In doing so, an unlimited attention and much effort should be given to realize CQI reaching the dimension of increase in comfort as well as decrease perceived discomfort.

• 한국환경생태학회지
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• 제23권2호
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• pp.169-176
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• 2009

본 연구는 변산반도국립공원 탐방객들의 탐방 후 평가를 통하여 만족도, 만족요인과 예측모형을 분석하여 실질적인 공원관리의 기초자료를 제공하는데 그 목적이 있다. 만족도 분석결과 내소사는 무분별한 취사행위, 불법포획 및 식물채취, 고성방가, 쓰레기 등, 격포는 혼잡도, 호객행위, 무분별한 이용, 잡상행위 등에 불만족하였다. 만족요인으로는 '이용자관리', '이용관리 I ' 요인이 내소사(65.1%)와 격포(68.4%)에서 가장 큰 영향을 미쳤으며, 만족도 예측모형에 있어서 내소사는 '경관자원의 훼손', '공원정보 부족', '혼잡도', '관리자의 친절 및 안내부족' 등이, 격포는 '경관자원의 훼손', '공원정보 부족', '잡상행위'. '숙박시설', '관리자의 친절 및 안내부족' 등의 순으로 만족도에 영향을 미치는 예측모형이 만들어졌다. 따라서 산악과 해안공원의 차별화된 관리기법이 요구되고, 관리전략이나 정책도 필요하지만 탐방객의 교육을 위한 제도적 장치가 필요하였다.

• Earthquakes and Structures
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• 제14권5호
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• pp.411-424
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• 2018

This study explores the inelastic behavior of systems with flexible base. The use of a single degree of freedom system (ESDOF) with equivalent ductility to represent the response of flexible base systems is discussed. Two different equations to compute equivalent ductility are proposed, one which includes the contribution of rigid body components, and other based on the overstrength of the structure. In order to asses the accuracy of ESDOF approach with the proposed equations, the behavior of a 10-story regular building with reinforced concrete (RC) moment resisting frames is studied. Local and global ductility capacity and demands are used to study the modifications introduced by base flexibility. Three soil types are considered with shear wave velocities of 70, 100 and 250 m/s. Soil-foundation stiffness is included with a set of springs on the base (impedance functions). Capacity curves of the building are computed with pushover analysis. In addition, non linear time history analysis are used to asses the ductility demands. Results show that ductility capacity of the soil-structure system including rigid body components is reduced. Base flexibility does not modify neither yield and maximum base shear. Equivalent ductility estimated with the proposed equations is fits better the results of the numerical model than the one considering elastoplastic behavior. Modification of beams ductility demand due to base flexibility are not constant within the structure. Some elements experience reduced ductility demands while other elements experience increments when flexible base is considered. Soil structure interaction produces changes in the relation between yield strength reduction factor and structure ductility demand. These changes are dependent on the spectral shape and the period of the system with fixed and flexible base.

• Environmental Analysis Health and Toxicology
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• 제31권
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• pp.6.1-6.10
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• 2016

Objectives This study examined the spatial distribution and the extent of soil contamination by heavy metals resulting from primitive, unconventional informal electronic waste recycling in the Agbogbloshie e-waste processing site (AEPS) in Ghana. Methods A total of 132 samples were collected at 100 m intervals, with a handheld global position system used in taking the location data of the soil sample points. Observing all procedural and quality assurance measures, the samples were analyzed for barium (Ba), cadmium (Cd), cobalt (Co), chromium (Cr), copper (Cu), mercury (Hg), nickel (Ni), lead (Pb), and zinc (Zn), using X-ray fluorescence. Using environmental risk indices of contamination factor and degree of contamination ($C_{deg}$), we analyzed the individual contribution of each heavy metal contamination and the overall $C_{deg}$. We further used geostatistical techniques of spatial autocorrelation and variability to examine spatial distribution and extent of heavy metal contamination. Results Results from soil analysis showed that heavy metal concentrations were significantly higher than the Canadian Environmental Protection Agency and Dutch environmental standards. In an increasing order, Pb>Cd>Hg>Cu>Zn>Cr>Co>Ba>Ni contributed significantly to the overall $C_{deg}$. Contamination was highest in the main working areas of burning and dismantling sites, indicating the influence of recycling activities. Geostatistical analysis also revealed that heavy metal contamination spreads beyond the main working areas to residential, recreational, farming, and commercial areas. Conclusions Our results show that the studied heavy metals are ubiquitous within AEPS and the significantly high concentration of these metals reflect the contamination factor and $C_{deg}$, indicating soil contamination in AEPS with the nine heavy metals studied.

• Journal of Preventive Medicine and Public Health
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• 제28권3호
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• pp.588-608
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• 1995

This study was intended to enhance the level of hospital personnel management through analysing job satisfaction of hospital employees in terms of structural, personal and environmental variables. The sample of this study consist of a total of 790 persons including doctors, residents, interns, pharmacists, nurses, medical engineers, office workers and manual workers who have worked for general hospitals with 200 beds, 300 beds and 800 beds respectively. The Likert's 5 scales were used for the measurement of satisfaction. The results can be summarized as follows: 1. Structural Variables The level of satisfaction on the job itself was generally low, 2.8 in Likert's 5 scales, with the order of role ambiguity(3.87), routinization(2.6), work overload (2.45) and autonomy(2.37). Hospital employees are aware of their responsibility and they regarded their work as heavy one. The compensatory satisfaction degree was 2.5 which was also low: There were in the order stability(3.1), distributive justice(2.57), pay(2.3) and promotion(1.9). Usually hospital employees showed high degree of stability, while, their satisfaction on promotion possibility is quite low due to specially differentiated structures of hospitals. The degree of satisfaction on the internal conditions of organizational culture was relatively higher as 2.92: They were co-worker's support(3.69), supervisory support(3.15), role conflict(2.64) and welfare(2.17) in order. The satisfaction on welfare as an economic condition was the lowest. 2. Personal Variables The level of satisfaction on personal variables was 3.27 which seemed to be quite high: Contribution to the hospital(3.38), attitude on job performance(3.28) and pride as a member of the hospital(3.07). They seem to believe that their work has been helpful to the performance of hospitals. 3. Environmental Variables The degree of satisfaction on these variables was 3.07 on the average which was derived from environmental factors such as family-role conflict and community support related to hospital employees' environment. The order of satisfaction for each variable is community support(3.2) and family-role conflict(2.94). They turned out to be fairly satisfied with their job in community and yet, they wanted more spare time to spend with their family.

• 대한가정학회지
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• 제43권2호
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• pp.81-103
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• 2005

The main purpose of the research was to prove, in a practical sense, the relationship among perceived equity, role stress and life satisfaction of employed wives working in sales departments. The subjects were employed wives working in sales departments who have at least one child and a spouse, living in Seoul and the Metropolitan area. The final data analysis used 487 out of 668 questionnaires. Statistical analyses were carried out using SPSS/PC WIN which included frequencies, mean, percentages, Pearson's correlation, Cronbach's ${\alpha}$, factor analysis, multiple regression analysis. The findings of the study were as follows: 1) As their education level was low, the education level of their spouse was high, the communication level between couples was high, and the self-oriented perfectionism was low, their perceived emotional relationship was equal. As they were old, the communication level between couples was high, and the self-oriented perfectionism was low, their perceived position in sharing household chores was equal. On the other hand, as they were younger, the education level of their spouse was high, the reason for getting a job lay in supporting the family, and overtime hours worked, there was a higher level of role stress. 2) The influential variables which affect the life satisfaction, in order of importance, were communication level between couples, mother's role stress, age, non-financial reason of getting a job, and sharing household works. For relative contribution degree about life satisfaction, psychological variables among independent variables were revealed as the most influential ones. Thus, efficient communication between couples affected the life satisfaction to a great degree. Furthermore, the study proved that not only role stress variables but also perceived equity variables contributed to the life satisfaction.

• 한국구조물진단유지관리공학회 논문집
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• 제23권7호
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• pp.152-163
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• 2019

본 연구에서는 강섬유의 혼입, 매트릭스의 압축강도, 전단철근과 전단경간비가 UHPFRC 휨재에 미치는 영향에 대해 총 10개의 실험체에 대한 실험을 통해 검토하였다. 실험결과 2%의 부피비로 강섬유가 혼입된 경우 파괴 패턴을 전단파괴에서 휨파괴로 바꿀 정도로 높은 전단강도 증진효과를 보유하고 있는 것으로 나타났다. 또한 강섬유는 낮은 전단경간비에서 압축스트럿의 파괴를 지연시키는 효과를 가진 것으로 나타났다. 실험 결과 강섬유의 혼입과 전단경간비의 변화에 따라 균열각이 45도보다 낮은 것으로 나타났다. 실험 결과를 UHPC 설계권고안들과 비교해 본 결과 프랑스의 설계권고안은 보수적으로 평가하였고 한국의 설계권고안은 휨 강도에 대해 다소 과대평가하는 것으로 나타났다. 전단강도에 대해서는 두 설계권고안 모두 보수적으로 평가하는 것으로 나타났다.

• 한국컴퓨터정보학회논문지
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• 제17권11호
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• pp.149-161
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• 2012

인터넷 및 소셜 네트워크 등이 적극적으로 활용되는 사용자 참여 사회에서 사용자의 요구사항을 올바르게 시스템에 반영하는 것은 매우 중요하다. 본 연구에서는 C 사의1,800 여건의사용자 요구사항을 정형화하기 위한 절차와 기법을 제안하고, 정형화된 요구사항이 시스템 설계와 구현에 반영될 수 있도록 상대적 기여도를 측정하여 선정하는 기법을 제시한다. 다양한 사용자 요구사항을 요구사항 수준에 적합하도록 정형화하기 위하여, 요구사항 명세 표준에 따라 작성하고 키워드를 추출하고 상호 관계를 분석하여, 요구사항 계층 그래프를 작성하였다. 요구사항 계층 그래프는 시스템 설계와 구현을 위한 세부 목표를 정의하며, 계층별 요구사항의 상대적인 중요도를 표현한다. 요구사항의 상대적 중요도를 이용하여 요구사항별 상대적 기여도를 계산하고, 이를 이용한 선정 평가 기법을 제안한다. 제안한 기법의 타당성은 C 사의 사례 연구를 통하여 그 가능성을 입증하였다.

• 한국콘텐츠학회논문지
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• 제15권10호
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• pp.387-399
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• 2015

최근 보건의료분야에서는 협동연구를 위한 연구팀을 구성하기 위해 협업네트워크를 구축하고 연구자 역할을 파악함으로서 분야별 전문가 집단을 도출하고 있는 추세다. 본 연구는 1개 전문암센터 연구자들을 대상으로 기관 내 연구자들의 역할을 분석하고 협동연구 형태를 확인하기 위해 공저자 네트워크 분석을 수행하였다. 분석 자료는 2000년부터 2010년까지 SCI(E)에 발표한 연구논문 1,194건의 논문 저자 2,437명을 대상으로 중심성 분석을 하였다. 공저자 네트워크는 논문 수만 반영된 단순 중심성 값과 논문 수, 학술지 영향력 지수, 저자 기여도가 반영된 가중치 중심성 값을 산출하여 연구자 역할에 유의한 차이가 있는지 분석하였다. 단순 중심성 값과 가중치 중심성 값에 의한 연구자별 순위는 통계학적으로 유의하게 차이가 있었다(t=11.66, p=0.00). 논문의 다양한 속성이 고려된 공저자 네트워크 분석 결과는 연구자의 역할에 대한 보다 객관적인 자료를 제공함으로서 협동연구 수행을 위한 분야별 전문가를 확인할 수 있는 자료로 활용이 가능할 것이다.