• Journal of Forest and Environmental Science
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• 제35권1호
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• pp.54-60
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• 2019

Plant tissue culture techniques offer quick methods of regeneration of plants of medicinal importance but the survival chances of such plants are always questionable when shifted to the in vivo conditions. The present study enumerates the micromorphological developments in the leaves of in vitro regenerated and field transferred plantlets of Oldenlandia umbellata. The leaves developed in vitro after $4^{th}$ subcultures of multiplication phase and after 6 weeks of field transferred plants were used. Statistically significant differences in the number of stomata, veins, raphides, crystals and trichome density per square mm were observed. The improvements in stomatal apparatus and density (decreased from 41.85 to 32.20), developments in leaf architectural parameters and emergence of defense mechanism through increased numbers of raphides (8 to 15), crystals and trichomes (13.5 to 18.2) proved acclimation of tissue culture raised plantlets from in vitro to the in vivo environments lead to 100 % success in field establishment of the plantlets. The in vitro induced foliar abnormalities (changes in stomata, venation pattern, vein density, trichomes, crystals etc.) were repaired while hardening of plantlets in the greenhouse and finally in the field. The observed micromorphological response of leaves under altered environmental conditions could help in determination of proper stage of field transfer and prediction of survival percentage of in vitro regenerated O. umbellata plantlets.

• 지역사회간호학회지
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• 제32권1호
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• pp.24-39
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• 2021

Purpose: This study was to review the previous studies on the 'Willingness to Pay (WTP)' for healthcare services and suggest future implications for nursing research. Methods: Using the scoping review method, we used RISS, KISS, KMbase, Koreamed, PubMed, EMbase, CINAHL as searching engines. According to the selection and exclusion criteria, 40 appropriate studies were selected and analyzed. Results: 24 studies were categorized into medical service field among medical, public health, and nursing service fields. A total of 16 studies were related to healthcare system (policies), 13 studies were to the healthcare intervention, and 11 studies were categorized into the health management. Most of the methods for eliciting WTP (70%) were about a contingent valuation method (CVM), and the use of double bounded dichotomous choice (DBDC) tended to increase. In the nursing field, five WTP studies were identified: two studies published in the early years of 2000, which were conducted on hospital-based home health visit services. Recent studies were mostly about counseling and education by advanced practice nurses (APNs). Conclusion: WTP studies on healthcare services were largely published from the medical fields and health policy areas with the CVM method. In the field of nursing, studies have been conducted on the subject of limited service areas. More active exploration of research topics is required, particularly under the current policy setting, where discussion of the public health insurance fee for nursing practice is essential.

• 한국도서관정보학회지
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• 제42권2호
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• pp.171-191
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• 2011

본 연구는 문헌정보학 학술지의 최근 10년간 발표된 연구논문 2,165건에 대한 내용분석을 통해 현장연구의 현황 즉, 양적 변화, 주제, 연구자, 연구비 지원여부 등을 분석하였다. 연구결과, 전체 논문 중 현장연구는 691건으로 31.9%를 차지하는 것으로 조사되었다. 이들 현장연구의 주제를 도서관 유형별로 구분한 결과 공공도서관이 246편(35.6%)으로 가장 많았으며, 대학도서관이 238편(34.4%), 학교도서관 141편(20.4%), 그리고 기타 66편(9.6%)으로 조사되었다. 문헌정보학 관련 주제별로 구분한 결과는 도서관운영 관련 연구가 328편(47.5%)으로 가장 많았으며, 정보봉사, 정보시스템 및 전자도서관, 이용자교육, 독서교육 순으로 조사되었다. 저자별 구분의 경우 교수가 329편(47.6%)으로 가장 높게 조사되었으며, 사서, 교수/사서, 교수/학생, 강사 순으로 나타났다. 연구비지원 여부의 경우 대학으로부터 지원을 받는 경우가 145편으로 연구비 지원에 의해 수행된 논문 195편 중 74.4%로 절대적인 비중을 차지하였으며, 학술진흥재단 27편, 한국교육학술정보원 9편, 교육인적자원부 4편 순으로 조사되었다.

• 대한인간공학회지
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• 제32권5호
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• pp.459-467
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• 2013

Objective: The aim of this study is to review the studies on job rotation with various points of view and to classify the studies considering the approach methods. Background: Various work interventions were carried in order to prevent the work-related musculoskeletal disorders(WMSDs) and job rotation was considered as one of the simple and effective methods. Method: Previous studies were systematically collected with the combination of keywords such as job, task, rotation, allocation, line balancing, etc. Collected studies were classified into three categories: field study, laboratory study and optimization approach study. Results: Field studies showed that most studies focused on the evaluation of the factors causing the musculoskeletal disorder. Moreover, the effect of job rotation could be hard to identify because it required a long-period close observation. Laboratory studies covered only simple aspects of tasks or movements. Optimization approach studies showed the systematic approach to establish the job rotation scheme though many limitation and assumptions were adopted. Conclusion: This study collected and classified the previous studies on job rotation and presented the different approaches across various research areas. Application: The results of this study could help the practitioner and ergonomist how to establish the job rotation scheme.

• Journal of Magnetics
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• 제22권2호
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• pp.326-332
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• 2017

The effects of exposure to an extremely low-frequency magnetic field (25 Hz 20G) on animal cells have been studied. In some reports, stimulation was performed for fixed frequency and variations in magnitude; however, animal-cell experiments have established that both parameters play an important role. The present work undertook the modeling, simulation, and development of a uniform-magnetic-field generation system with variable frequency and stimulation intensity (0-60 Hz, 1-25G) for experimentation with cell cultures in situ. The results showed a coefficient of variation less than 1 % of the magnetic-field dispersion at the working volume, which is consistent with the corresponding simulation results demonstrating a uniform magnetic field. On the other hand, long-term tests during the characterization process indicated that increments of only $0.4^{\circ}C$ in the working volume temperature will not be an interfering factor when experiments are carried out in in situ cell cultures.

• 한국자기학회:학술대회 개요집
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• 한국자기학회 2011년도 임시총회 및 하계학술연구발표회
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• pp.15-16
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• 2011

• 한국환경교육학회지:환경교육
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• 제13권2호
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• pp.91-102
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• 2000

National curriculum for environmental education recommends various teaching-learning methods including survey and discussion of environmental problems, investigation of case studies, experiments, role play, and field-experience learning in addition to the traditional lecture-oriented teaching methods. The field experience learning in environmental education is considered to be a good method to develop environmentally sound attitude and to cultivate environmental sensitivity, but here has been very limited research concerning models for field-experience learning. The aim of this study is to develop a model of the field-experience learning program of environmental education utilizing environmental facilities. In this study a kind of such a basic model was developed and presented. The developed basic model of the field-experience learning was applied to the case utilizing landfill facilities. A specific application of the landfill program to the Bangcheon-ri landfill, in Daegu, was also presented with related teaching materials developed in this studies. And various aspects in the program was discussed.

• 한국콘텐츠학회논문지
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• 제20권10호
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• pp.544-553
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• 2020

본 연구는 국내 사회복지학문 분야에서 공감연구의 동향을 분석함으로써 사회복지의 학문적 역할을 점검하고 향후 나아갈 방향과 과제를 모색하고자 하였다. 이를 위하여 2000년부터 2020년 6월까지 진행된 국내 사회복지학문 분야의 공감 관련 학술논문을 선정하여 범주체계에 따른 '기술적 분석'과 언어 동시출현 빈도를 중심으로 한 언어 네트워크 분석을 수행하였다. 분석결과 사회복지학문 분야의 공감관련 연구는 2000년 이후로 꾸준히 증가하는 추세로 최근 3년간 수량적으로 대폭 증가하였고 연구분야는 '사회복지일반' 범주에 속하는 연구들이 주를 이루었다. 연구내용으로는 공감과 다른 변인과의 관계를 밝히는 관련요인 연구가 가장 많았고 연구에 사용된 연구방법으로는 양적연구가 가장 큰 비중을 차지하였다. 이와 같은 연구결과는 사회복지학문분야에서 공감 관련 연구가 증가함에 따라 연구분야와 연구내용의 확장 및 다양한 연구방법의 시도 등의 노력이 요구된다.

• Wind and Structures
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• 제26권3호
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• pp.179-190
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• 2018

Translation of tornadoes is an important feature in replicating the near-ground tornado flow field which has been simulated in previous studies based on Ward-type tornado simulators using relative motion of the ground plane. In this laboratory investigation, effects of translation on the near-ground tornado flow field were studied using the ISU Tornado Simulator that can physically translate over a ground plane. Two translation speeds, 0.15 m/s and 0.50 m/s, that scale up to those corresponding to slowly-moving tornadoes in the field were selected for this study. Compared with the flow field of a stationary tornado, the simulated tornado with translation had an influence on the spatial distribution and magnitude of the horizontal velocities, early reversal of the radial inflow, and expansion of the core radius. Maximum horizontal velocities were observed to occur behind the center of the translating tornado and on the right side of its mean path. An increase in translation speed, resulted in reduction of maximum horizontal velocities at all heights. Comparison of the results with previous studies that used relative motion of the ground plane for simulating translating tornadoes, showed that translation has similar effects on the flow field at smaller radial distances (~2 core radius), but different effects at larger radial distances (~4 core radius). Further, it showed that the effect of translation on velocity profiles is noticeable at and above an elevation of ~0.6 core radius, unlike those in studies based on the relative motion of the ground plane.

• 수완나부미
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• 제10권1호
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• pp.63-91
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• 2018

One of the goals of this article is to continue the momentum begun by emerging scholarship on theory and practice of writing about visual culture of and in Southeast Asia. I hope to offer culturally sensitive and embodied ways of looking at images and objects as sites/sights of cultural knowledge as further theoretical intervention. The argument put forward in my essay is three-fold: first, I critique the prevailing logocentric approach in the field of Southeast Asian Studies and I argue that in a postcolonial, global, and transnational period, it is important to be inclusive of other objects as sites/sights of social, political and cultural analysis beyond written and oral texts. Second, I argue that although it has its own political and theoretical problems, the evolving field of Visual Studies as it is practiced in the United States is one of many ways to decolonize the prevailing logocentric approach to Southeast Asian Studies. Third, I argue that if one reads these Euro-American derived theories of vision and visuality through the lens of what Walter Mignolo calls "colonial difference(s)," then Visual Studies as an evolving field has the potential to offer more nuanced local ways of looking at and understanding objects, vision, and visuality. Last, I point out that unlike in the West where there is an understanding of pure, objective and empirical vision, local Southeast Asian perspectives on objects and visions are more embodied and multi-sensorial. I argue that if one is ethically mindful of the local cultural ways of seeing and knowing objects, then the evolving field of Visual Studies offers a much-needed intervention to the privileged, lingering logocentric approach to Southeast Asian Studies. Moreover, these alternative methods might help to decolonize method and theory in academic disciplines that were invented during the colonial period.