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검색결과 362건 처리시간 0.021초

Elimination of SPFMV from Virus-infected Sweet Potato Plants through Apical Meristem Culture

  • Kim, Young-Seon;Jeong, Jae-Hun;Park, Jong-Suk;Eun, Jong-Seon
    • Plant Resources
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    • 제7권3호
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    • pp.200-205
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    • 2004
  • Sweet potato infected with a viral disease (SPFMV) showed irregular chlorotic patterns, so called feathering associated with faint or distinct ring spots that have purple-pigmented borders. SPFMV was eliminated from sweet potato plants using meristem tip culture. MS medium supplemented with BAP (2mg/L) and NAA (0.05 mg/L) was used for shoot proliferation and 1/2 MS medium for rooting of the plants. Highest percentage of regenerated plants (60%) was obtained from the optimum size (0.3-0.5mm) meristem tips. Of these, 60% plants were found negative for SPFMV by RT-PCR. Virus detection by RT-PCR was found to be a reliable method. Meristem-tip culture to produce SPFMV-free quality sweet potato and virus detection by RT-PCR is an efficient, time saving and reliable method for production of SPFMV-free tissue culture raised plants.

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Restructuring and Performance among Japanese Firms after Prudential Policy Reform

  • Beason, Dick;Gordon, Ken;Mehrotra, Vikas;Watanabe, Akiko
    • 아태비즈니스연구
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    • 제1권1호
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    • pp.41-60
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    • 2010
  • After over a decade of sluggish economic growth accompanied by massive fiscal stimulus in the 1990s, it remains an open question whether and how Japanese firms have restructured their operations, and whether these efforts have borne any fruit. Using a randomly selected sample of 300 firms from the Tokyo Stock Exchange, we collect all restructuring announcement in the FY 2000-2001 (April 2000-March 2002) period. Our results are striking in that while we find that firms engaging in restructuring of various sorts display improved earnings in the period following the restructuring announcement, shareholders do not appear to benefit at the time of the restructuring announcements.

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The Kinetography Model - a Mean of Producing Space Scores, Based on Recording Users' Movement in Space

  • Ardelean, Ioana
    • International Journal of Advanced Culture Technology
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    • 제7권4호
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    • pp.308-312
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    • 2019
  • When one enters a space, perceives the material geometry of that space. Walking inside buildings or across the city is generating a geometry of moving bodies that fills the space. These two geometries coexist: a static geometry of the space and an invisible one of the moving bodies. The space that we actually experience, whether interior or exterior, is a continuous network of voids. Individuals' movement will fill the network of voids that we understand as "the city". Our environment of voids and borders is organized by the means of architecture and urbanism. The geometry generated by motion affects both the limits and the voids, thus space can be defined by the tandem of the moving bodies and their environment. We propose in this study a mean of investigating users' movement and thus understanding the qualities of space while introducing the concept of space scores as analytical maps and design tools.

발생중의 무당개구리 前賢 및 中賢의 Alkaline Phosphatase활성 (Alkaline Phosphatase Activity in the Developing Pronephros and Mesonephros of the Frog Bombina orientalis)

  • Jae Chung Hah
    • 한국동물학회지
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    • 제17권4호
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    • pp.177-184
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    • 1974
  • 발생중의 무당개구리에서의 전신 및 중신 alkaline phosphatase 활성을 Gomori 변법을 써서 관찰하였다. 전신 분비세관의 분화와 함께 세관 刷子綠에 출현한 alkaline phosphataseghkf성은  蓋완성기에 최고도에 달하였다가 제3후지 형성기에 전신의 퇴화와 함께 효소활성은 감소 소실되었다.  蓋완성기에 출현한 중신세관에서의 alkaline phosphatase 활성은 변태기를 통하여 강한 양성반응을 보였다.

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개의 교핵내 GABA성 신경세포 성분에 관한 광학현미경적 고찰 (Light Microscopic Obsenrations of GABA-Immunoreactive Neuronal Elements in the Dog Basilar Pons)

  • 이현숙
    • 한국동물학회지
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    • 제38권1호
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    • pp.66-73
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    • 1995
  • Putative gamma aminobu%sic acid (GABA)-ersic elements in the basilar pontine nuclei were examined in the dos using an antiserum against GABA-glutaraldehvde-protein conjusBtes and the peroxidase-antiperoxidase method. GABA-immunoreactive neuronal somata in the basilar Pons exhibited various morphology with the majority being spindle-shaped or multipolar, while some were spheroidal. The size of GABA-orgic neuronal somata was relatively small (approximately $10-20\mum)$ in diameter. GABA-immunoreactive neurons were scattered throughout the pontine nuclei, but the midline region of the medial nucleus at the rostral pons, the lateral nucleus at mid-pontine levels, and the ventral nucleus at the caudal pons exhibited a relatively greater concentration of cell bodies. A sparse number of GABA-ergic neurons were observed within the cerebral peduncle and along the ventral borders of the basilar pons adjacent to the middle cerebellar peduncle at the rostrocaudal levels of the pontine nuclei. These obsenrations provide anatomic evidence of how this inhibitory neural element performs its function in the cortico-prontocerbellar circuitry.

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단일 엣지를 이용한 깊이 정보에 관한 연구 (A Study on the Depth Map using Single Edge)

  • 김영섭;송응열
    • 반도체디스플레이기술학회지
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    • 제9권2호
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    • pp.123-126
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    • 2010
  • An implementation of modified stereo matching using efficient belief propagation (BP) algorithm is presented in this paper. We do recommend the use of the simple sobel, prewitt edge operator. The application of B band sobel edge operator over image demonstrates result with somewhat noisy (distinct border). When we adopt the only MRF + BP algorithm, however, borders cannot be distinguished due to that the message functions in the BP algorithm is just the mechanism which passes energy data to the only large gap of each Message functions In order to address the abovementioned disadvantageous phenomenon, we use the sobel edge operator + MRF + BP algorithm to distinguish the border that is located between the similar message data. Using edge information, the result shows that our proposed process diminishes the propagation of wrong probabilistic information. The enhanced result is due to that our proposed method effectively reduced errors incurred by ambiguous scene properties.

Lightweight Convolutional Neural Network (CNN) based COVID-19 Detection using X-ray Images

  • Khan, Muneeb A.;Park, Hemin
    • Journal of Multimedia Information System
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    • 제8권4호
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    • pp.251-258
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    • 2021
  • In 2019, a novel coronavirus (COVID-19) outbreak started in China and spread all over the world. The countries went into lockdown and closed their borders to minimize the spread of the virus. Shortage of testing kits and trained clinicians, motivate researchers and computer scientists to look for ways to automatically diagnose the COVID-19 patient using X-ray and ease the burden on the healthcare system. In recent years, multiple frameworks are presented but most of them are trained on a very small dataset which makes clinicians adamant to use it. In this paper, we have presented a lightweight deep learning base automatic COVID-19 detection system. We trained our model on more than 22,000 dataset X-ray samples. The proposed model achieved an overall accuracy of 96.88% with a sensitivity of 91.55%.

파종얕은광선땀구멍각화증에서 발생한 다양한 피부종양 (Various Skin Tumors Originating from Disseminated Superficial Actinic Porokeratosis)

  • 정해봉;조정원;신영빈;김지연
    • 대한피부과학회지
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    • 제56권10호
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    • pp.628-630
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    • 2018
  • Disseminated superficial actinic porokeratosis (DSAP) is a rare keratinization disorder. It is histopathologically characterized by the presence of coronoid lamellae and clinically by lesions showing central atrophy with elevated borders. Squamous cell carcinoma originating in the classical Mibelli subtype of porokeratosis is well-documented; however, few reports have described squamous cell carcinoma in DSAP lesions. We report the case of a 76-year-old woman with DSAP who developed Bowen's disease, actinic keratosis, and keratoacanthoma on her face.

심미적 경험으로서의 언캐니 (Uncanny as Aesthetic Experience)

  • 이주은
    • 정신분석
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    • 제28권3호
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    • pp.69-75
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    • 2017
  • This paper interprets the work of Hans Bellmer, who took pictures after making a doll and distorting its form, and Diane Arbus, who took documentary photographs of unusual and marginalized people, as uncanny anxiety referred to by Freud. Through these two photographers' works, this paper examined how anxiety was used as an aesthetic strategy, and discussed the uncanny as an aesthetic experience. Uncanny refers to the phenomenon of familiar things being repressed and returning to their original place, or the phenomenon of familiarity being alienated due to repression. The aesthetic strategy of uncanny is used to bring a blind spot in reality that can be easily missed with an ordinary vision into the fore, by allowing for the slight shock to an appreciator. The ultimate goal of uncanny aesthetics is to promote both inner and external changes as well as to expand the scope of imagination, through freely crossing the borders between consciousness and unconsciousness, sympathy and antipathy, and reality and fiction.

Strategies for Technology Development in Developing Countries: Focusing on Korea

  • Yun, Yeo Gyeong;Shin, Geon-Cheol
    • Asia Pacific Journal of Business Review
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    • 제3권1호
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    • pp.1-17
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    • 2018
  • South Korea has had a rich history of independent thinking and self-reliance since the Korean Conflict. The war left the country the need for infrastructures in a variety of fields. Instead of relying on aid from foreign nations, however, key figures within South Korea's borders fathered the nation's first government-funded scientific and engineering institute, the Korea Institute of Science & Technology (KIST). Even though KIST encountered numerous obstacles, its commitment to research and development (R&D) would ultimately allow it play a crucial role in the rebuilding of the country. As a result of the institute's success, South Korea was able to move forward economically to become a beacon of hope for developing nations around the world.