• Title/Summary/Keyword: historical change

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STUDYING THE CHRONICLE OF TIMBERLAND USING HISTORICAL ORTHOPHOTO AND SATELLITE DATA

  • Cho, Hyoung-Sig;Jayakumar, S.;Heo, Joon
    • Proceedings of the KSRS Conference
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    • 2007.10a
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    • pp.576-579
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    • 2007
  • Timber inventory is a good starting point for developing strategies to effectively manage the timberland. In the sale of timberland, pricing is mostly based on this inventory. For a small timberland, inventory by conventional ground survey could be possible. In the case of large and nationwide business transactions, swift and inexpensive inventory is worth to be considered as the conventional methods require more experienced man power, money and time. In the present study, it was aimed to identify the chronicle of timberland such as changes that has occurred owing to silvicultural activities and by other means using the historical aerial photography and satellite data. Historical aerial photos from National Aerial Photography Program (NAPP), National High Altitude Photography (NHAP), Survey Photography and Landsat satellite data were used. Orthophotos were constructed using the DOQQ and DEM from USGS. Simple photo interpretation technique was employed to classify the orthophoto and satellite data. The plantation area was classified into softwood, mixed and hardwood. The timber age and the corresponding acreage details and the changes were also estimated. The result of this study could be more useful to the timberland buyers to better understand the chronicle of timberland of their interest prior to transactions.

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The New Directions of Secondary Geometry Curriculum on Historical Perspectives (기하와 기하교육과정 변천과 21세기 기하교육의 방향)

  • Chang, Kyung-Yoon
    • Journal for History of Mathematics
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    • v.21 no.4
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    • pp.105-126
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    • 2008
  • This article summarizes the historical changes of the secondary school geometry to give insights into the new direction of geometry education for the 21th century. Geometry has been considered as an essential subject in high school since mid-nineteen century in accordance with the social changes. Since the development of computer softwares such as CAD effects on the role of geometry in work and professional societies, the knowledge and skills the contemporary world require to school geometry have being changed. More focus on applications and modeling aspects, expansion of reasoning and problem solving, emphasis on design-related elements are features of the school geometry for the new century.

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An Historical Investigation of the Historical Developments of the Concept of Continuous Functions (함수의 연속성 개념의 역사적 발달 과정 분석 - 직관적 지도의 보완을 중심으로 -)

  • Joung, Youn-Joon;Kim, Jae-Hong
    • Journal of Educational Research in Mathematics
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    • v.23 no.4
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    • pp.567-584
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    • 2013
  • In school mathematics, the concept of continuous functions has been intuitively taught. Many researches reported that many students identified the continuity of function with the connectedness of the graphs. Several researchers proposed some ideas which are enhancing the formal aspects of the definition as alternative. We analysed the historical developments of the concept of continuous functions and drew pedagogical implications for the intuitive teaching of continuous functions from the result of analysis.

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Yet Another Paradigm Shift?: From Minds-on to Hearts-on

  • Song, Jin-Woong;Cho, Sook-Kyoung
    • Journal of The Korean Association For Science Education
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    • v.24 no.1
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    • pp.129-145
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    • 2004
  • Since science was first taught in schools, maybe during the 18th century, school science education has experienced many substantial changes in its goals and nature over the period. The historical changes are usually referred to by some key terms, like, mechanics' institutes, object lessons, heuristics, general science, inquiry, STS, misconceptions. To characterize these changes, science educators frequently use some slogan-like analogies, referring to parts of the human body to indicate the movement of science education during a particular period of time: for example, 'Hands-On' for inquiry movement during 1960s-70s, 'Minds-On' for constructivist movement during 1980s-90s. In this paper, we briefly summarize the overall historical development of science education in Britain, then further expand the analogies to cover the overall process, that is, Ears-On ${\to}$ Eyes-On ${\to}$ Hands-On ${\to}$ Minds-On. To illustrate future directions of the 21st century, we propose a new analogy, 'Hearts-On', and also discuss the meanings and implications of a 'Hearts-On' analogy by illustrating how this new paradigm can be applied to reflect various current trends of science education, particularly in Korea. In addition, a parallel historical change between school science and science museums & centres is discussed.

A Study on the Formation of Urban Squatter in Korea and their Housing Culture from Socio-historical Point of View (사회사적 관점에서 본 우리나라 도시빈민의 형성배경과 주거문화 -한국전쟁 이후 집단이주민촌부터 외환위기 이후 신빈곤층 주거까지-)

  • Kim, Myo-Jung
    • Journal of the Korean housing association
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    • v.18 no.4
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    • pp.79-88
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    • 2007
  • The purpose of the this study was to provide the basic information about the formation background of urban squatter and their housing state in Korea. This study was progressed on the basis of socio-historical point of view from after the Korean War to the present time. Therefore, this study considered the meaning of housing for urban squatter in the Korean housing history. For this study, the formation background of urban squatter was divided into five periods. The first one was the period of the policy on the mass migration (1955-1960) after the Korean War. The second period was the period of reproduction of deteriorated residential area (1960-1970) for the continuing mass migration policy. The third was the period of disbanding of deteriorated residential area (1970-1980) for redevelopment. The forth period was before the IMF (1980-1997) broke up the deteriorated residential area. The fifth period was after the IMF (1997-) produced the new poverty due to the unemployment and the business failure. Thus, such social change increased the number of urban squatter and created the new type urban poor.

Social Constructivism Revisited Focusing on the Controversies with History of Technology (사회구성주의의 재검토: 기술사와의 논쟁을 중심으로)

  • Song Sung-Soo
    • Journal of Science and Technology Studies
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    • v.2 no.2 s.4
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    • pp.55-89
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    • 2002
  • The purpose of this article is to examine and assess the main issues in social constructivism with reference to the history of technology. Social constructivism, as an alternative explanation to technological change, has developed its points actively responding to various criticisms. Historians of technology have joined in dialogues with social constructivists through controversies about narrative vs theory, reliability vs performance, and evolution of bicycle. Social constructivists tend to use new jargons excessively, don't deal historical materials rigorously, and don't consider content-dependency sufficiently. To apply social constructivism to Korean cases many problems should be identified including the deficiency of historical materials, the importance of technological learning, and the peculiarity of relevant social group.

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Sports and Culture: Exploration for the Thought of Diversity and Historical Approach

  • CHANG, Deok Seon;KIM, Hae Yu;LEE, Hyuk Jin
    • Journal of Sport and Applied Science
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    • v.4 no.4
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    • pp.7-17
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    • 2020
  • Purpose: This study started with interest in sport culture and is meaningful as an exploratory study to help with the basic understanding of sport culture research. Research design, data, and methodology: The approach of this study is the exploratory approach by literature reviews. This study carried out exploratory research on thinking about diversity of sports culture and the development process of sports culture by human history periods. Results: First, in thinking about cultural diversity, cultural absolutism and cultural relativism were identified. The characteristics of sports culture can identify universality, individuality and diffusion, and the attributes of sports culture included sharing, learning, accumulation, whole systematic relationship and change. Second, the characteristics of sports culture were identified by the approach of each historical era. The historical stages were divided into ancient civilizations, ancient Greece and Rome, middle ages and early modern period, and late modern period. Sports have historically been found to have a British-centered European origin or popularized in the United States. Conclusions: with the characteristics of modern sports culture, the globalization of sports culture, the prominence of sports industry and sports space marketing, and the symbiotic influence relationship of sports and mass media were examined and future directions were discussed.

Effects of Local History Trekking Education on Social Development and Historical Consciousness of College Students

  • Kim, Byung-Kwan;Kim, Ah-Reum;Ko, Kyoung-Ho
    • International journal of advanced smart convergence
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    • v.11 no.3
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    • pp.142-149
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    • 2022
  • This study aims to develop the education for college students who should perform the social role of the fut ure by conducting trekking activities including the characteristics, history, and culture of Cheonan area and then investigating the sociality and history of 36 college students. Taejosan, Seonggeosan, and Heukseongsan, which are part of the independent ring of Cheonan city, were selected as courses. The training was conducted by six instructors majoring in humanities, history, physical education and medicine. Teachers of humanities and history majors conducted theoretical lectures to raise the historical awareness of Cheonan area related to trekking course. In trekking practice, instructors of physical education and medicine majored in trekking safety education and course progress. Among the social development factors, responsibility, autonomy, and sociality were high. After the education, students recognized that the interest and necessity of history were high in order to understand the present society, thought that they made a lot of development compared to the previous one, and answered that the main development factors of history were the people and that there was a change in perception through this education. This study was composed of the survey after the education, so the psychological characteristics of the individual were not reflected, and it is difficult to generalize it because the number of subjects is small. In the future, more subjects need to be investigated and local residents need to investigate changes in local awareness.

A Study on the Imjin War's Historical Materials with Multi-layer Network Analysis and Topic Modeling (다중 네트워크 분석과 토픽 모델링을 이용한 임진왜란 시기 사료에 관한 연구)

  • Cho, HyunChul;Song, Min
    • Journal of the Korean BIBLIA Society for library and Information Science
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    • v.33 no.1
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    • pp.167-198
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    • 2022
  • Convergence science research is activated, and digital humanities research is also encouraged in humanities. Therefore, this study attempted to propose a experimental study that applies Text mining and Entitymetrics methods to historical materials. Annals of King Seonjo, revised Annals of King Seonjo, Miscellaneous Record of the War and Writings on Imjin War were used, also network analysis and DMR topic models were used to explore topic changes and common entities in historical sources. Through the results, it was possible to propose the availability of quantitative analysis for text data, presenting a timing change of a specific topic, and an undiscovered relationship between person entities.

Ontology Versions Management on the Semantic Web

  • Yun, Hong-Won
    • Journal of information and communication convergence engineering
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    • v.2 no.1
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    • pp.26-31
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    • 2004
  • In the last few years, The Semantic Web has increased the interest in ontologies. Ontology is an essential component of the semantic web. Ontologies continue to change and evolve. We consider the management of versions in ontology. We study a set of changes based on domain changes, changes in conceptualization, metadata changes, and temporal dimension. In many cases, we want to be able to search in historical versions, query changes in versions, retrieve versions on the temporal dimension. In order to support an ontology query language that supports temporal operations, we consider temporal dimension includes transaction time and valid time. Ontology versioning brings about massive amount of versions to be stored and maintained. We present the storage policies that are storing all the versions, all the sequence of changed element, all the change sets, the aggregation of change sets periodically, and the aggregation of change sets using a criterion. We conduct a set of experiments to compare the performance of each storage policies. We present the experimental results for evaluating the performance of different storage policies from scheme 1 to scheme 5.