• The Plant Pathology Journal
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• 제17권3호
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• pp.169-173
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• 2001

Virus disease occurred up to 62% in average in the greenhouse production of table tomato Seokwang in Suwon, Korea. From symptomatic transition of the labeled tomatoes, two different symptoms, mosaic and bud necrosis, were developed independently. Cucumber mosaic virus necrosis strain (CMV-N) was isolated from table tomato showing bud necrosis symptoms. The isolate caused the bud necrosis on four tomato cultivars and locally infected Chenopodium spp. and Vicia faba by mechanical inculation. The 5th RNA segment, satellite RNA, was identified from CMV-N-infected plants by dsRNA analysis. Crystals of virus particles were observed in cytosols and vacuoles. The virus particles of CMV-N presented abundantly in xylem vessel.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권12호
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• pp.4835-4848
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• 2020

The recent expansion of the digital content market is increasing the technical demand for various facial image transformations within the virtual environment. The recent image translation technology enables changes between various domains. However, current image-to-image translation techniques do not provide stable performance through unsupervised learning, especially for shape learning in the face transition field. This is because the face is a highly sensitive feature, and the quality of the resulting image is significantly affected, especially if the transitions in the eyes, nose, and mouth are not effectively performed. We herein propose a new unsupervised method that can transform an in-wild face image into another face style through radical transformation. Specifically, the proposed method applies two face-specific feature loss functions for a generative adversarial network. The proposed technique shows that stable domain conversion to other domains is possible while maintaining the image characteristics in the eyes, nose, and mouth.

• Structural Engineering and Mechanics
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• 제37권2호
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• pp.197-213
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• 2011

Concrete is a heterogeneous material exhibiting quasi-brittle behaviour. While homogenization of concrete is commonly accepted in general engineering applications, a detailed description of the material heterogeneity using a mesoscale model becomes desirable and even necessary for problems where drastic spatial and time variation of the stress and strain is involved, for example in the analysis of local damages under impact, shock or blast load. A mesoscale model can also assist in an investigation into the underlying mechanisms affecting the bulk material behaviour under various stress conditions. Extending from existing mesoscale model studies, where use is often made of specialized codes with limited capability in the material description and numerical solutions, this paper presents a mesoscale computational model developed under a general-purpose finite element environment. The aim is to facilitate the utilization of sophisticated material descriptions (e.g., pressure and rate dependency) and advanced numerical solvers to suit a broad range of applications, including high impulsive dynamic analysis. The whole procedure encompasses a module for the generation of concrete mesoscale structure; a process for the generation of the FE mesh, considering two alternative schemes for the interface transition zone (ITZ); and the nonlinear analysis of the mesoscale FE model with an explicit time integration approach. The development of the model and various associated computational considerations are discussed in this paper (Part 1). Further numerical studies using the mesoscale model for both quasi-static and dynamic loadings will be presented in the companion paper (Part 2).

• 농촌계획
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• 제13권3호
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• pp.1-11
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• 2007

In the continued economic prosperity, concern about environment and landscape is converted to develop actual institutional system on conservation and management of landscape. In these transition periods, the objective of this study is to suggest limitations and improvements of landscape conservation system for each landscape type such as rural landscape, natural landscape, urban landscape, historical landscape through reviewing related policies, laws, and case studies. As a results, landscape conservation system is insufficient for each landscape type and is regulated sporadically by a few laws. In particularly, rural landscape has been damaged seriously since significance of it was lesser recognized than other landscape types. Urban landscape is managed by landscape ordinance and planning which local government developed, however it doesn't have effectiveness due to insufficient legal basis and related cases. Therefore to enhance recognition of landscape as well as to support the law of landscape which is established this year is required.

• 한국기계가공학회지
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• 제20권2호
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• pp.38-44
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• 2021

To cater to the transition from single-color to multicolor/multi-material printing, this paper proposes a cartridge-replacing type multi-nozzle Fused Depositon Modeling(FDM) three-dimensional (3D) printer. In the test printing run, tool change failure/wobble/layer shift occurred. It was confirmed that improper support was the cause of this tool change failure. As a solution, spline and electromagnetic cartridges were designed. Wobble was caused by machine vibration and the motor stepping out. To minimize wobble, an additional Z-axis was installed, and the four-point bed leveling method was used instead of the three-point bed leveling method. The occurrence of layer shift was ascribed to the eccentricity of the Z-axis lead screw. Therefore, slit coupler was replaced with an Oldham type. In addition to the mechanical supplementation, the control environment was integrated to prevent accidents and signal errors due to wire connections. Before the final test printing run, a rectifier circuit was added to the motor to secure precise control stability. The final test printing run confirmed that the wobble/layer shift phenomenon was minimized, and the maximum error between layers was reduced to 0.05.

• Nuclear Engineering and Technology
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• 제54권9호
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• pp.3299-3309
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• 2022

Nuclear energy has the potential to play an influential role in energy transition efforts than is now anticipated by many countries. Realizing sustainable human development and reducing global climate crises will become more difficult without significantly increasing nuclear power. This paper aims to probe the role of nuclear energy, external debt, and financial globalization in sustaining human development and environmental conditions simultaneously in BRICS (Brazil, Russia, India, China, and South Africa) countries. This study applied a battery of second-generation estimation approaches over the period from 1990 to 2019. These methods are useful and robust to cross-countries dependencies, slope heterogeneity, parameters endogeneity, and serial correlation that are ignored in conventional approaches to generate more comprehensive and reliable estimates. The empirical findings indicate that nuclear energy and financial globalization contribute to human development, whereas external debt inhibits it. Similarly, financial globalization accelerates ecological deterioration, but nuclear energy and external debt promote environmental sustainability. Moreover, the study reveals bidirectional feedback causalities between human development, carbon emissions and nuclear energy consumption. The study offers useful policy guidance on accomplishing sustainable and inclusive development in BRICS countries.

• 한국전통조경학회지
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• 제30권4호
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• pp.32-43
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• 2012

항주는 중국에서 2,300년의 역사를 지니고 있으며, 자연풍광이 아름답기로 유명한 역사문화도시이다. 특히 서호는 세계적으로 유명한 경치 좋은 호수로서, 2011년에 유네스코 세계문화경관유산으로 등재되었다. 서호는 변천과정을 거치면서도 역사경관은 사라지지 않고, 각 시기별 지속적인 보호와 관리로 현재까지 최적화를 유지할 수 있었다. 따라서 쾌적한 주거환경을 개발하면서 지속가능한 역사경관의 보존을 위해 서호 경관의 변천과정에 대한 연구는 매우 중요하다. 이 연구에서는 항주 서호 경관의 변천과정을 중심으로 먼저 고대 항주의 도성구조와 사상적 배경을 사료와 문헌을 통해 서호 경관의 당, 송, 원, 명, 청 각 시기의 특징과 변천과정 및 역사적 경험을 분석하였다. 연구결과, 항주는 도성계획에 있어 역(易)과 풍수사상 및 "관자(管子)" 사상에서 영향을 받아 입지선정과 주변의 자연환경과의 고려를 중요시하였다. 따라서 항주 서호 경관의 특징은 산수풍경을 그림처럼 표현하고 지형과 주변 환경에 조성되었다. 서호는 송대 이후, 청대까지의 역대 조정은 천 년 동안 지속적으로 여러 번의 정비와 건설을 통해, 현재의 경관이 완성되었다.

• 한국미생물·생명공학회지
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• 제51권3호
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• pp.257-267
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• 2023

The potential polyhydroxyalkanoates (PHA)-producing bacteria, Bacillus megaterium PP-10, was successfully isolated and studied its feasibility for utilization of pineapple peel waste (PPW) as a cheap carbon substrate. The PPW was pretreated with 1% (v/v) H₂SO₄ under steam sterilization and about 26.4 g/l of total reducing sugar (TRS) in pineapple peel hydrolysate (PPH) was generated and main fermentable sugars were glucose and fructose. A maximum cell growth and PHA concentration of 3.63 ± 0.07 g/l and 1.98 ± 0.09 g/l (about 54.58 ± 2.39%DCW) were received in only 12 h when grown in PPH. Interestingly, PHA productivity and biomass yield (Y_x/s) in PPH was about 4 times and 1.5 times higher than in glucose. To achieve the highest DCW and PHA production, the optimal culture conditions e.g. carbon to nitrogen ratios of 40 mole/mole, incubation temperature at 35℃ and shaking speed of 200 rpm were performed and a maximum DCW up to 4.24 ± 0.04 g/l and PHA concentration of 2.68 ± 0.02 g/l (61% DCW) were obtained. The produced PHA was further examined its monomer composition and found to contain only 3-hydroxybutyrate (3HB). This finding corresponded with the presence of class IV PHA synthase gene. Finally, certain thermal properties of the produced PHA i.e. the melting temperature (T_m) and the glass transition temperature (T_g) were about 176℃ and -4℃, respectively whereas the M_w was about 1.07 KDa ; therefore, the newly isolated B. megaterium PP-10 is a promising bacterial candidate for the efficient conversion of low-cost PPH to PHA.

• 대한약침학회지
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• 제20권4호
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• pp.230-234
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• 2017

Objective: Neurasthenia is a disease which consists of increased fatigue or bodily weakness and exhaustion plus pantalgia, dizziness, headache and other symtoms relevant to autonomic nerve dysfunction. There are plenty of studies investigating the history of diagnostic criteria of neurasthenia, which is influenced by diverse cultural(or social) environment. The obejective of this study is to provide review of the previous studys on the changes of neurasthenia diagnoses in the context of local area to find meanings of these transition and improve health care for psychiatric patient. Methods: Literature review was conducted on studies demonstrating diagnostic criteria of neurasthenia with cultural(or social) environment. We investigated the literature reviews or observative studies which described alteration of diagnostic criteria of neurasthenia and assessed its significance. After selecting eligible studies, the authors read the articles and summarized the meaningful contents those were significant in clinical practice. Results: Transformation of Chinese Classification of Mental Disorder(CCMD) integrated with internationally utilized DSM-IV or ICD-10 is controversial about its significance in that it had limited effect on public health care due to the variables of sociocultural context, but primarily differentiated neurasthenia from other disorders. The latter one can be the directing point of the diagnostic criteria of other culture-bound diseases, which is the traits of not outstanding mood(or affect) than other neurotic disorders. Conclusion: As diagnostic criteria of neurasthenia varies, the significance of this variation is controversial, but could be the paragon of other culture-bound diseases.

• 한국가정과교육학회지
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• 제34권4호
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• pp.93-111
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• 2022

제4차 산업혁명, 포스트 코로나 시대로의 전환 등 사회적 혁신을 기반으로 모두를 위한 삶의 질을 제고할 수 있는 교육 패러다임의 전환이 필요한 시기이다. 이러한 시대 변화의 흐름을 파악하여 교육과정의 변화를 준비하여야 한다. 이에 본 연구는 4차 산업혁명, 포스트 코로나 시대로의 패러다임의 변화에 따른 미래 초·중등교육의 방향성이 논의되고 있는 시점에서, '미래교육환경의 변화에 따라 의생활교육은 어떤 혁신적 과제를 수행해야 하는가?'의 문제의식에서 출발하여 미래 교육환경의 변화의 특징과 의생활교육과정을 분석해보고, 이를 바탕으로 의생활교육과정의 방향을 탐색하는데 목적을 두었다. 이러한 연구목적을 수행하기 위해 제1차 교육과정에서부터 2015 개정 교육과정의 의생활교육과정 분석결과를 활용하였다. 결론적으로 미래 교육환경의 변화에 따른 의생활교육과정의 방향으로는 먼저 인재상으로 인공지능(AI)에 인간의 감성과 환경, 의생활문화를 더하는 융·복합교육인재양성, 소프트웨어 역량과 실천적 문제해결 역량을 연계하는 의생활교육, 인공지능(AI)을 활용한 패션 메이커교육과 가치 지향적인 의생활교육 등을 도출하였다. 본 연구를 통해 실제적 교육현장 적용인 의생활 교수·학습방법에 대한 후속연구가 진행되기를 기대한다.