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Classification of Natural and Artificial Forests from KOMPSAT-3/3A/5 Images Using Deep Neural Network (심층신경망을 이용한 KOMPSAT-3/3A/5 영상으로부터 자연림과 인공림의 분류)

  • Baek, Won-Kyung;Lee, Yong-Suk;Park, Sung-Hwan;Jung, Hyung-Sup
    • Korean Journal of Remote Sensing
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    • v.37 no.6_3
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    • pp.1965-1974
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    • 2021
  • Satellite remote sensing approach can be actively used for forest monitoring. Especially, it is much meaningful to utilize Korea multi-purpose satellites, an independently operated satellite in Korea, for forest monitoring of Korea, Recently, several studies have been performed to exploit meaningful information from satellite remote sensed data via machine learning approaches. The forest information produced through machine learning approaches can be used to support the efficiency of traditional forest monitoring methods, such as in-situ survey or qualitative analysis of aerial image. The performance of machine learning approaches is greatly depending on the characteristics of study area and data. Thus, it is very important to survey the best model among the various machine learning models. In this study, the performance of deep neural network to classify artificial or natural forests was analyzed in Samcheok, Korea. As a result, the pixel accuracy was about 0.857. F1 scores for natural and artificial forests were about 0.917 and 0.433 respectively. The F1 score of artificial forest was low. However, we can find that the artificial and natural forest classification performance improvement of about 0.06 and 0.10 in F1 scores, compared to the results from single layered sigmoid artificial neural network. Based on these results, it is necessary to find a more appropriate model for the forest type classification by applying additional models based on a convolutional neural network.

A Study on Popular Success Factors Shown in Raquel, Huerta's Neoclassical Tragedy (우에르따의 신고전주의 비극 『라?』에 나타난 대중적 성공 요인에 관한 연구)

  • Yoon, Yong-Wook
    • Cross-Cultural Studies
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    • v.42
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    • pp.393-418
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    • 2016
  • Raquel, the representative work of Vicente García de la Huerta, an 18th century Spanish playwright achieved theater box-office success and popularity during staging. It has been evaluated by many scholars and critics as the ideal drama that faithfully followed the norms of neoclassicism, which pervaded the aesthetic mainstream at the time. However, the factor that enabled the popular success of this theater production was its ability to harmonize the themes or contents with a traditional play to meet the unique trends and tastes of Spanish viewers who were still appreciated earlier Baroque theater, rather than complying with external norms of neoclassicism such as principle of three unities or exclusion of comic figures etc. That is, Spanish viewers of the time thoroughly rejected theater of neoclassicists who attempted to unilaterally enlighten them while regarding the Baroque theater of earlier times as full of superstition and irrationality, illogic and disorder, regardless of their own dramatic taste. In this situation, Huerta's tragedy Raquel, achieved the harmony of neoclassical tragedy and Spanish theatrical tradition. It thus emphasizes the importance of public support and sponsorship in dramatic success. Traditional dramatic elements shown in Raquel can be summarized as honor, poetic justice and love and these elements are major dramatic codes penetrating the entire Baroque theater of Spain.

A Corpus-based Study of Translation Universals in English Translations of Korean Newspaper Texts (한국 신문의 영어 번역에 나타난 번역 보편소의 코퍼스 기반 분석)

  • Goh, Gwang-Yoon;Lee, Younghee (Cheri)
    • Cross-Cultural Studies
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    • v.45
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    • pp.109-143
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    • 2016
  • This article examines distinctive linguistic shifts of translational English in an effort to verify the validity of the translation universals hypotheses, including simplification, explicitation, normalization and leveling-out, which have been most heavily explored to date. A large-scale study involving comparable corpora of translated and non-translated English newspaper texts has been carried out to typify particular linguistic attributes inherent in translated texts. The main findings are as follows. First, by employing the parameters of STTR, top-to-bottom frequency words, and mean values of sentence lengths, the translational instances of simplification have been detected across the translated English newspaper corpora. In contrast, the portion of function words produced contrary results, which in turn suggests that this feature might not constitute an effective test of the hypothesis. Second, it was found that the use of connectives was more salient in original English newspaper texts than translated English texts, being incompatible with the explicitation hypothesis. Third, as an indicator of translational normalization, lexical bundles were found to be more pervasive in translated texts than in non-translated texts, which is expected from and therefore support the normalization hypothesis. Finally, the standard deviations of both STTR and mean sentence lengths turned out to be higher in translated texts, indicating that the translated English newspaper texts were less leveled out within the same corpus group, which is opposed to what the leveling-out hypothesis postulates. Overall, the results suggest that not all four hypotheses may qualify for the label translation universals, or at least that some translational predictors are not feasible enough to evaluate the effectiveness of the translation universals hypotheses.

Characteristics of the Traditional Family System in Black Africa (흑아프리카 전통 가족 제도의 특징)

  • Yu, Jai-Myong
    • Cross-Cultural Studies
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    • v.45
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    • pp.269-293
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    • 2016
  • This research studies the characteristics of the family systems of traditional societies in Black Africa. For this purpose, this study has chosen three subtopics: the distinctive features of traditional societies, marriage customs (polygamy and polyandry), and the societal features of patriarchal and matriarchal societies. First, we analyze men's and women's roles, ownership and management of the land, dowry, and social values of livestock as the distinctive features that support the family system in traditional Black African societies. These elements play an important role in increasing the number of family members. Next we analyze marriage customs-polygamy and polyandry-which increase the number of family members, on the one hand, and secure the labor force, on the other hand. Most traditional societies in Black Africa prectice polygamy. However, the $Bashil{\acute{e}}l{\acute{e}}$ and Bahima prectice polyandry. Polygamy in traditional societies in Black Africa is based on the traditional social customs that display the authority and dignity of the family head, who has control over all family members in both patrilineal and matrilineal societies. The authority and dignity of the family head are used to keep and increase the number of family members, that is, to secure the community firmly. Finally, most traditional societies are patrilineal. However, matrilineal societies are prevalent in the so-called Matrilineal Belt, which term refers to the savanna regions where Bantu peoples reside, that is, the coastal regions from the Angolan coast, bordering the Atlantic, to the Tanzanian and Mozambique coasts that border the Indian Ocean. These societies trace descent through the maternal bloodline. The traditional family system in Black Africa is based on economic social, and political factors, as well as on the community spirit of the members, which has resulted from the choices made to increase the prosperity and well-being of the people.

Geochemical Study on the Naturally Originating Fluorine Distributed in the Area of Yongyudo and Sammokdo, Incheon (인천 용유도와 삼목도 지역 내 분포하는 자연기원 불소에 대한 지구화학적 연구)

  • Lee, Jong-Hwan;Jeong, Jong-Ok;Kim, Kun-Ki;Lee, Sang-Woo;Kim, Soon-Oh
    • Economic and Environmental Geology
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    • v.52 no.4
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    • pp.275-290
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    • 2019
  • Geochemical study was conducted to elucidate the origin of fluorine (F) distributed in the rocks within the four areas of Yongyudo and Sammokdo, Incheon, which have been used as the source area of land reclamation for the $3^{rd}$ and $4^{th}$ stage construction sites of the Incheon International Airport. The main geology of the study area is Triassic biotite granite. Fluorine is contained at high levels in biotite granite, mylonite, and dykes (andesite and, basaltic-andesite). Furthermore, the higher concentrations of fluorine in the biotite granite can be contributed to fluorite. The results of microscopic analyses reveal that the fluorite was mostly observed as small vienlets together with quartz. This features support that fluorite was naturally formed due to the secondary process of hydrothermal fluids. In addition, fluorine was investigated to be highly enriched in a large amount of mica within the veins. In the case of mylonite, a high levels of fluorine was contributed to a large amount of sericite. The sericites contained in the mylointe, differently to those of the biotite granite, filled the micro-fractures of quartz formed as a result of mylonitization and included small cataclastic quartz grains. This indicates that fluorine was naturally enriched due to the alteration of hydrothermal fluids filling fractured zones formed by mylonitization. Consequently, the results of petrological and mineralogical study confirm that the fluorine distributed in the rocks within the Yongyudo and Sammokdo originated naturally.

A Study on the Strengthening of the Library's Role via the Provision of Health Information Service (건강정보서비스 제공을 통한 도서관의 역할강화에 관한 연구)

  • Noh, Younghee
    • Journal of the Korean BIBLIA Society for library and Information Science
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    • v.30 no.2
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    • pp.117-144
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    • 2019
  • Today, interest in health information has risen overall due to the aging society, increased public interest in the quality of life, and the increased state's interest in reducing medical costs. Accordingly, efforts have been made across the library and information science in terms of academic research, libraries in terms of providing health specialized services, and the state, yet policies and strategies for providing the health related information in an integrated and systematic manner through the libraries have not been proposed with clarity to date. Thus, this study aimed to propose a method to provide the health information in an integrated manner by the libraries through the previous studies, policy studies, and case studies. Consequently, it proposes to build a system to integrate the health information, build an overall database of the health related information, develop and operate a health specialized library program, operate a general support center for the health information service, and build a cooperative network among the related departments and institutions for the health information service. The details proposed by this study is likely to contribute to developing services for improving the health of the citizens of this country.

A Study on the Citizen Advocates' Perception of Their Role for People with Developmental Disabilities (시민옹호인의 역할인식에 관한 연구 - 발달장애인 옹호경험을 중심으로 -)

  • Jeon, Ji-Hye;Lee, Se-Hee
    • Journal of Convergence for Information Technology
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    • v.9 no.3
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    • pp.112-119
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    • 2019
  • This study examined the role of citizen advocates in advocating for people with developmental disabilities. Citizen advocacy refers to activities that advocate and represent citizens on behalf of those who are socially vulnerable. The purpose of this study is to analyze the role concept of citizen advocates by conducting focus group interviews and dividing the 13 citizen advocates with developmental disabilities into 4 groups. It is divided into four main subjects and nine sub-themes. The main theme are 'Self-transformation of the parties', 'Restoring the rights of the parties', 'Being with the parties', and 'Expanding the world of the parties'. Sub-themes are 'Recognizing and solving the problem of self', 'Granting role to speak', 'Recovering the initiative of service use', 'Restoring the rights of existing (family and neighbor), "Preventing money harm" "Speaking instead", "Encouraging and petting people", "Promoting change in the community", and "Expanding the size of the world a little bit". Based on this, we discussed the importance of citizen advocacy as a preventive advocacy system, the relationship between citizen advocacy and professional advocacy system, the difference between volunteer and personal assistants and citizen advocacy, and considerations for citizen advocacy.

Quantitative uncertainty analysis for the climate change impact assessment using the uncertainty delta method (기후변화 영향평가에서의 Uncertainty Delta Method를 활용한 정량적 불확실성 분석)

  • Lee, Jae-Kyoung
    • Journal of Korea Water Resources Association
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    • v.51 no.spc
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    • pp.1079-1089
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    • 2018
  • The majority of existing studies for quantifying uncertainties in climate change impact assessments suggest only the uncertainties of each stage, and not the total uncertainty and its propagation in the whole procedure. Therefore, this study has proposed a new method, the Uncertainty Delta Method (UDM), which can quantify uncertainties using the variances of projections (as the UDM is derived from the first-order Taylor series expansion), to allow for a comprehensive quantification of uncertainty at each stage and also to provide the levels of uncertainty propagation, as follows: total uncertainty, the level of uncertainty increase at each stage, and the percentage of uncertainty at each stage. For quantifying uncertainties at each stage as well as the total uncertainty, all the stages - two emission scenarios (ES), three Global Climate Models (GCMs), two downscaling techniques, and two hydrological models - of the climate change assessment for water resources are conducted. The total uncertainty took 5.45, and the ESs had the largest uncertainty (4.45). Additionally, uncertainties are propagated stage by stage because of their gradual increase: 5.45 in total uncertainty consisted of 4.45 in emission scenarios, 0.45 in climate models, 0.27 in downscaling techniques, and 0.28 in hydrological models. These results indicate the projection of future water resources can be very different depending on which emission scenarios are selected. Moreover, using Fractional Uncertainty Method (FUM) by Hawkins and Sutton (2009), the major uncertainty contributor (emission scenario: FUM uncertainty 0.52) matched with the results of UDM. Therefore, the UDM proposed by this study can support comprehension and appropriate analysis of the uncertainty surrounding the climate change impact assessment, and make possible a better understanding of the water resources projection for future climate change.

SOURCE-FREQUENCY PHASE-REFERENCING OBSERVATION OF AGNS WITH KAVA USING SIMULTANEOUS DUAL-FREQUENCY RECEIVING

  • Zhao, Guang-Yao;Jung, Taehyun;Sohn, Bong Won;Kino, Motoki;Honma, Mareki;Dodson, Richard;Rioja, Maria;Han, Seog-Tae;Shibata, Katsunori;Byun, Do-Young;Akiyama, Kazunori;Algaba, Juan-Carlos;An, Tao;Cheng, Xiaopeng;Cho, Ilje;Cui, Yuzhu;Hada, Kazuhiro;Hodgson, Jeffrey A.;Jiang, Wu;Lee, Jee Won;Lee, Jeong Ae;Niinuma, Kotaro;Park, Jong-Ho;Ro, Hyunwook;Sawada-Satoh, Satoko;Shen, Zhi-Qiang;Tazaki, Fumie;Trippe, Sascha;Wajima, Kiyoaki;Zhang, Yingkang
    • Journal of The Korean Astronomical Society
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    • v.52 no.1
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    • pp.23-30
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    • 2019
  • The KVN(Korean VLBI Network)-style simultaneous multi-frequency receiving mode is demonstrated to be promising for mm-VLBI observations. Recently, other Very long baseline interferometry (VLBI) facilities all over the globe start to implement compatible optics systems. Simultaneous dual/multi-frequency VLBI observations at mm wavelengths with international baselines are thus possible. In this paper, we present the results from the first successful simultaneous 22/43 GHz dual-frequency observation with KaVA(KVN and VERA array), including images and astrometric results. Our analysis shows that the newly implemented simultaneous receiving system has brought a significant extension of the coherence time of the 43 GHz visibility phases along the international baselines. The astrometric results obtained with KaVA are consistent with those obtained with the independent analysis of the KVN data. Our results thus confirm the good performance of the simultaneous receiving systems for the nonKVN stations. Future simultaneous observations with more global stations bring even higher sensitivity and micro-arcsecond level astrometric measurements of the targets.

Qualitative Case Study on Psychological Difficulties Found In Each Divorce Decision Making Stage That Senescent Women Face in Their Early Stage of Elderly Life (초기노년기 여성이 경험한 이혼결정단계별 심리적 어려움에 관한 질적사례연구)

  • Moon, Jung Hwa;Kim, Mi Ra
    • Korean Journal of Family Social Work
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    • no.58
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    • pp.67-96
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    • 2017
  • The purpose of this study is to examine psychological difficulties that elderly women experience in each divorce decision making stage and they are shown by counselling cases made with elderly women who got divorced in their early stage of elderly life. For this purpose, total 18 counseling cases were collected from November 2012 to March 2013 and a qualitative analysis was made accordingly. The result of this study was made by analyzing meaningful subjects emerged in individual testimonies during a counseling process and it shows that the decision to divorce goes through stages such as , , , , , and . In addition, psychological difficulties experienced in a divorce decision process appear to be, , , , , , and . It is meaningful that this study provides counseling strategies for psychosocial support of the elderly women who go through difficulties in their divorce decision making process.