• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 2000.11b
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• pp.279-286
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• 2000

The objective of this research is to detect the papaya fruits on tree in an orchard. The detection of papaya on natural background is difficult because colors of fruits and background such as leaves are similarly green. We cannot separate it from leaves by color information. Therefore, this research will use shape information instead. First, we detect an interested object by detecting its boundary using edge detection technique. However, the edge detection will detect every objects boundary in the image. Therefore, shape description technique will be used to describe which one is the interested object boundary. The good shape description should be invariant in scaling, rotating, and translating. The successful concept is to use Fourier series, which is called "Fourier Descriptors". Elliptic Fourier Descriptors can completely represent any shape, which is selected to describe the shape of papaya. From the edge detection image, it takes a long time to match every boundary directly. The pre-processing task will reduce non-papaya edge to speed up matching time. The deformable template is used to optimize the matching. Then, clustering the similar shapes by the distance between each centroid, papaya can be completely detected from the background.

• Korean Journal of Soil Science and Fertilizer
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• v.49 no.2
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• pp.200-207
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• 2016

To add new groundwater standard, 7 candidate materials (copper, zinc, selenium, manganese, iron, chromium, aluminum) were calculated by CROWN (Chemical Ranking Of groundwater pollutaNts). Copper and zinc were selected as groundwater candidates through the process and monitored total 430 samples for 2 years with 113 groundwater sampling sites. In this study, geological distribution characteristics (igneous rock, metamorphic rock, sedimentary rock) of copper and zinc were evaluated and the geological background levels obtained by a cumulative probability distribution and pre-selection methods were compared. In the results, the highest average concentrations of the copper and zinc were observed both in the igneous rock. The detection concentration ranges of copper and zinc in 430 groundwater samples were $0.002{\sim}0.931mg\;L^{-1}$, and $0.002{\sim}32.293mg\;L^{-1}$, respectively. In addition, detection concentration ranges of copper and zinc were $0.002{\sim}0.931mg\;L^{-1}$, $0.002{\sim}32.293mg\;L^{-1}$ in the igneous rock, $0.002{\sim}0.134mg\;L^{-1}$, $0.004{\sim}7.038mg\;L^{-1}$ in the metamorphic rock and $0.002{\sim}0.008mg\;L^{-1}$, $0.003{\sim}3.948mg\;L^{-1}$ in the sedimentary rock, respectively. As a result of the background concentrations with two methods, zinc concentrations with the pre-selected method are comparatively higher than that of the others with the cumulative distribution.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2009.10a
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• pp.255-258
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• 2009

This study shows that the $Hg^0$ background concentration over the Yellow Sea was generally higher than those observed over other seas/oceans around the world. $Hg^0$ concentrations measured in the urban stomophere were significantly higher than the background concentration in China. Elevated $Hg^0$ concentrations at Deokjeok Island in Korea were attributed to long-range transport of mercury from high emission areas in China.

• Perspectives in Nursing Science
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• v.16 no.1
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• pp.12-24
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• 2019

Purpose: This study examined the suitability of using text network analysis (TNA) methodology for topic analysis of academic papers related to nursing. Methods: TNA background theories, software programs, and research processes have been described in this paper. Additionally, the research methodology that applied TNA to the topic analysis of the academic nursing papers was analyzed. Results: As background theories for the study, we explained information theory, word co-occurrence analysis, graph theory, network theory, and social network analysis. The TNA procedure was described as follows: 1) collection of academic articles, 2) text extraction, 3) preprocessing, 4) generation of word co-occurrence matrices, 5) social network analysis, and 6) interpretation and discussion. Conclusion: TNA using author-keywords has several advantages. It can utilize recognized terms such as MeSH headings or terms chosen by professionals, and it saves time and effort. Additionally, the study emphasizes the necessity of developing a sophisticated research design that explores nursing research trends in a multidimensional method by applying TNA methodology.

• Nuclear Engineering and Technology
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• v.25 no.3
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• pp.361-370
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• 1993

Low power physics tests should be peformed for the domestic pressurized light water reactors (PWRs) after refueling. The tests are peformed to ensure that operating characteristics of the core are consistent with predictions and that the core can be operated as designed. But in some low power physics tests, slow but steady reactivity increasing phenomena were noticed after step reactivity insertion by the control rod movement. These reactivity increasing phenomena are due to the low flux level and the gamma background because an uncompensated ion chamber (UIC) is used as the ex-core neutron detector. The gamma background may affect the results or the lour power physics tests. The aims or this paper are to analyze the grounds of such phenomena, to simulate a reference bank worth measurement test and to present a resolution quantitatively. In this study, the gamma background level was estimated by numerically solving the point kinetics equations accounting the gamma background effect. The reactivity computer check test was simulated to verify the model. Also, an appropriate neutron flux level was determined by simulating the reference bank worth measurement test. The determined neutron flux level is approximately 0.3 of the nuclear heating flux. This level is about 3 times as high as the current test upper limit specified in the test procedure. Then, the findings from this work were successfully applied to Kori unit 4 cycle 7 and Yonggwang unit 1 cycle 7 physics tests.

• Korean Journal of Human Ecology
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• v.17 no.3
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• pp.377-387
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• 2008

The study is to research their parenting efficacy and parenting practices of a parent teacher as a volunteer(PTV) in the kindergarten. The subjects were mothers (N=127) in Choongbuk Province who had had volunteer education as a teacher assistant. The data were collected by their completing a questionnaire about Parenting efficacy and a Parent As A Teacher inventory (PAAT). The results include as follows: firstly, in PTV's parenting efficacy, 'the type of educational institution children are attending' is an important variable. Secondly, 'mother's educational background', 'father's educational background', and 'the type of educational institution children attending' are important variables in volunteer parents' parenting practices. Besides, 'mother's educational background' and 'participation motivation in volunteer activity' are important variables in parenting practices of 'control/permission' and of 'teaching/learning', and in general parenting practices. Finally, 'parenting efficacy', 'mother's educational background', and 'the sex of children' are important variables in volunteer teachers' parenting practices.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.744_745
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• 2009

고해상도의 NMR 연구 개발을 위해서는 고자장의 마그넷연구가 선행되어야 한다. 고자장을 구현하기 위해서는 저온초전도체를 이용한 마그넷뿐만이 아니라 고온초전도체를 이용한 인서트 코일의 연구가 필요하다. 연세대학교에서는 국가지정연구실사업으로 단백질 구조 규명의 초고자장 NMR 실현을 위한 고온초전도 인서트 코일 기술연구를 진행하고 있다. 본 논문에서는 고온초전도 인서트 코일 연구를 위해 제작할 LTS background magnet과 HTS 인서트 코일에 대한 전자장 해석을 진행하였다. 균일도나 선재 사양 등의 주요 변수 등을 고려하여 LTS background magnet과 HTS 인서트 코일에 적합한 사양을 결정하도록 하였다.

• Journal of Biomedical Engineering Research
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• v.8 no.1
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• pp.69-74
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• 1987

The power spectrum of background EEG is estimated by the Plsarenko Harmonic Decomposition with the stochastic process whlch consists of the nonhamonic sinus Bid and the white nosie. The estimation results are examined and compared with the results from the maximum entropy spectral extimation, and the optimal order of this from the maximum entropy spectral extimation, and the optimal order of this model can be determined from the eigen value's fluctuation of autocorrelation of background EEG. From the comparing results, this method is possible to estimate the power spectrum of background EEG.

• International Journal of Knowledge Content Development & Technology
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• v.3 no.2
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• pp.5-27
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• 2013

The purpose of the study is to assess the professional inclination, academic and social background, family status and their occupation, gender distribution, choice of work, and their perceptions of aspirant LIS students. The study examined the various career choice factors and sources of motivation that influence the students of LIS profession. The data has been collected from the 251 LIS students' enrolled five prominent universities of North India. The results indicate that majority of female students join the LIS profession because of employment opportunities. Most of the respondents are from rural areas, hails to middle class families and their educational background in Arts/Humanities and Social Science subjects. Majority of the respondents choose the LIS profession as primary career because for the better employment possibilities. The study recommends the public awareness about the LIS profession in India.

• Journal of Convergence for Information Technology
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• v.11 no.11
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• pp.38-43
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• 2021

As the number of augmented reality games using augmented reality technology increases, the demands of users are also increasing. Game technologies used in augmented reality games are mainly games using MARKER, MARKERLESS, GPS, etc. Games using this technology can augment the background and other objects. To solve this problem, we want to help develop augmented reality games by analyzing objects in the background, which is an important element of augmented reality. To analyze the background in the augmented reality game, the background object was analyzed by applying a deep learning model using TensorFlow Lite in the UNITY engine. Using this result, we obtained the result that augmented objects can be placed in the game according to the types of objects analyzed in the background. By utilizing this research, it will be possible to develop advanced augmented reality games by augmenting objects that fit the background.