• Asian Pacific Journal of Cancer Prevention
• /
• v.15 no.9
• /
• pp.4061-4065
• /
• 2014

The presence of viral DNA in breast cancer cells is controversial. However, some studies have revealed a possible role for the human papillomavirus in the pathogenesis of breast cancer. The aim of the present study was to investigate the presence of HPV-DNA in breast tissue in a group of Iranian women with and without breast cancer and identification of the detected HPV types. Paraffin-embedded specimens from 65 malignant breast cancer cases and 65 cases with benign breast lesions were investigated for presence of HPV-DNA by nested polymerase chain reaction. We found HPV-DNA in 22 (33.8%) of the breast cancer specimens. All non-cancerous specimens were negative. Low and high-risk HPV types, including HPV-6 (26.2%), HPV-16 (1.5%), HPV-35 (1.5%), HPV-52 (1.5%), and HPV-11 (1.5%) were detected in our study. HPV-6 was the most prevalent type in the breast cancer specimens. Although high-risk HPV types have been shown to have a major role in cervix cancer, there have been no data that support the same relevance for other types of malignancies. Furthermore, presence of low-risk HPV types in malignancies still is a matter of debate. The data presented in this study indicates a strong need for epidemiological studies correlating different HPV types in human breast cancer.

• Quality Improvement in Health Care
• /
• v.7 no.1
• /
• pp.72-89
• /
• 2000

Background : Various types of protective footwear have been used to minimize bacterial contamination in operating rooms. In recent years, debate has arisen concerning the need for use of such protective footwear. This study was designed to provide useful data about choosing shoes most suitable for the surgical environment. Methods : Between November, 1999 and January, 2000, we performed this experimental study by comparing effect of three types of shoes (i.e., disposable shoescover, operating room-restricted shoes, and ordinary shoes) on bacterial contamination of operating rooms equipped with two different ventilation systems (i.e., high air-change, low air-change) respectively. Data were collected during two- hour sham operations in which subjects and their activities were strictly standardized. Bacterial flora were sampled from the study area floor and air colony counts were measured. Results : In experiments involving high air-change ventilation system, there was a significant difference of floor contamination between three types of shoes, but no difference of air contamination. Under low air-change system, there was a significant difference of both floor and air contamination between three types of shoes. Conclusion : The results show that protective footwear would be unnecessary in the operating room with high air-change ventilation system, but it is important to choose suitable shoes carefully under low air-change system. Therefore, the use of outdoor shoes can be considered under high air-change system, but it would seem sensible to apply their first use in less bloody operations at the day surgery center or out-patient department to prevent transfer of body fluid into the outside environment.

• The korean journal of orthodontics
• /
• v.26 no.4
• /
• pp.349-358
• /
• 1996

To extract or not to extract permanent teeth for the correction of malocclusion has been a great debate in the history of orthodontics, and there is a variety of analytic methods and criteria to aid in the diagnosis. Extraction formulas that has been presented are many analytic methods that depend on arch length discrepancy, dental prominence, and skeletal pattern of the each patients. Of these analysis, the most important diagnostic factor is patient's skeletal pattern. Because the behavior of the dentition is closely dependent upon the skeletal pattern of each patient, dentition must be arranged within that person's skeletal frame. EI(Extraction Index) is composed of CF, interincisal angle, and lip position. CF is made of ODI and APDI that differentiate vertical and horizontal component of the skeletal pattern. So, EI not only represents patient's skeletal pattern, but also takes facial appearance into consideration. This study was undertaken to investigate EI and related cephalometric variables on the cephalogram of Korean adolescents which consisted of 153 persons with normal occlusion, harmonious skeleton and pleasing face. The following conclusions were obtained. 1. The mean value of the ODI is $73.5^{\circ}$, APDI $82.5^{\circ}$, CF $156.3^{\circ}$ 2. The mean value of the interincisal angle is $123.6^{\circ}$ 3. The mean distance of upper lip to E-line is 0.0mm, lower lip to E-line is 1.4mm. 4. The mean value of the EI is $153.8^{\circ}$.

• Journal of Digital Convergence
• /
• v.18 no.6
• /
• pp.45-52
• /
• 2020

This study ranked the degree to which flipped learning contributes to each learning area and, in contrast, to quantitatively examine how effectively these learning methods are used in flipped learning, had four-year university computer majors receive flipped learning. Existing flipped learning experiments have proven effectiveness, while there are also negative effects on effectiveness, which has led to a lot of debate. Effective experiments and classes therefore require more research and an accurate understanding of flipped learning. Analysis of the 123 samples recruited shows that flipped learning contributes to learning is in order of self-directing, collaboration, watching videos, and learning by teachers. Regression analysis of the degree to which learning method affects flipped learning effectiveness resulted in order of self-directed learning, lecture videos, and collaborative learning. This shows that flipped learning not only has the greatest influence on self-directed learning, but also self-directed learning has the greatest influence on flipped learning. It can also see that a collaborative learning and the role of video to prior learning tool is important. Through this study, we hope to understand flipped learning correctly and set learning methods and achievement goals. It is necessary to analyze the interaction between flipped learning and subdivided classroom activities.

• Korean Journal of Environment and Ecology
• /
• v.16 no.1
• /
• pp.55-67
• /
• 2002

Lately a few of new ecological management policies have been developed and implemented to need objectives of national parks in effective ways. Examples include trail closing for preserving bears, no pets allowance for possible diesease expansion, and no fire in national parks. Such new policies can cause visitors and local residents inconvenience and dissatisfaction. Decision-making processes based on public participation became more important as a primary mean to decrease such undesirable reactions. This study examined conflicts between collective value and individual preference in process building an ecological management policy by analysis of questionnaire survey results. The subjects of the present study were 242 university students. The majority(93.%) accepted the need of public participation in decision-making processes, and the most important reason was that such processes can properly help decison makers understand what the public and local residents want(51.7%). They also answered that individual property right can be limited for preserving species but the limited right should be compensated by the government(93.0%). The great majority(97.1%) of respondents supported the trail closing policy designed to protect bears(Urus thibetanus) from being captured no matter what their personal preference is. On the contrary, more than half of the respondents answered that local residents should be allowed to gather herbs and plants even within national park area since they have been doing for a long time. The results of the present study seem to support major findings of some previous studies that it is critical for policy makers to encourage the public to consider issues under debate from the perspective of collective value rather than individual preference and provide them with necessary information and chances to discuss to each other in public participation processes.

• The Journal of the Korea Contents Association
• /
• v.20 no.6
• /
• pp.230-240
• /
• 2020

Recently, the social debate about the fourth industrial revolution has been actively developed, and it is predicted that the 4th Industrial Revolution will have a great influence on our society, cities, residential and industrial spaces. Especially, it is anticipated that the technological development of the 4th Industrial Revolution will cause a wide range of changes in residential style and culture. Therefore, it is necessary to grasp the direction of future change in advance and proactively respond to future tasks and strategies need. The purpose of this study is to predict the direction and characteristics of the mid - to long - term changes in future housing that will be brought about by the 4th Industrial Revolution and to define future social, spatial and technological impacts and issues and to find policy measures for them. STEEP (V) as a methodology for forecasting future has been used. It is a process of deriving technical and social issues by using Big Data. It collects various keywords and draws out key issues and summarizes social change patterns related to each core issue. The proposed strategy for future housing prediction and countermeasures can be used as a basic data for future directions of housing policy and suggests a process for deriving reasonable and reasonable results from multiple data sets rather than accurate prediction.

• Journal of the Economic Geographical Society of Korea
• /
• v.20 no.1
• /
• pp.49-69
• /
• 2017

The crisis of western welfare states and the spread of neoliberalism opened up the debate on community question and paid attention to community to cope with diverse social crises. There has been increasing recognition for the need to see World Heritage in terms of place and local community which had formed it rather than an object for conservation separated from the place where it is located. In addition, the conservation and use of cultural heritage can lead to the region's sustainable development and in turn is possible with the region's overall development. However, the Operational Guidelines for the Implementation of the World Heritage Convention does not specify the definition and geographic extent of community. This paper considers place-based communities, Sahachons and religious communities, Sindohoes of seven Buddhist monasteries in preparation for inscription on the UNESCO World Heritage List, and analyzes social networks of these two types of communities to see their consistency with their general characteristics. Social networks analyses indicates that some monasteries show significant differences between Sahachons and Sindohoes, but others do not. This result implies that communities should be seen as processes of constantly reconstituting their features and boundaries under their specific surroundings which are also in constant changes, thus requiring empirical studies.

• Journal of Science Education
• /
• v.39 no.3
• /
• pp.343-357
• /
• 2015

The present study aims to analyze the extent of the use of STS contents in the areas of 'Evolution of Life' and 'Health of Humanity and Scientific Technology' in 'Science' textbooks and to determine whether they meet the goals of the curriculum revised in 2009. The analysis of the 7 types of textbooks according to the STS topics areas indicated big differences between textbooks as little as 16.67% and as much as 58.33%. Also, among the topics associated with STS, 'Space Development and National Defense' and 'Environmental Problems' were not included. In the STS activity areas, the areas of 'Structured Debate,' 'Interpretation of Data,' 'Research and Investigation' showed great frequency. On the other hand, the STS activity areas of 'Field Activities,' 'Problem-solving and Decision-making,' 'Role Playing,' 'Simulation,' 'Case Study,' and 'Research Design' showed small frequency. Analysis of the STS contents for each area indicated 67.57% for the contents relevant to 'the applicability of science' accounting for the largest part whereas 'Understanding of Occupations related to Science' accounted for 1.63%, showing a great difference in their frequency. Seven standards except 'the applicability of science' were included each contents beyond 10% or less than 10% proportion. The STS contents included in the life science area of the 7 types of convergence-style 'Science' textbooks for the high-school accounted for an average of 20.75%, from as little as 12.35% to as much as 26.90%, depending on the publishes.

• Informatization Policy
• /
• v.25 no.1
• /
• pp.3-29
• /
• 2018

The Federal Communications Commission voted to repeal net neutrality protections on December 14, 2017. This is the very opposite decision of the net neutrality rule that the Obama administration has consistently maintained. The ensuing storm from the repeal of net neutrality protections has an extensively effect enough on individuals and businesses to cover the entire spectrum, and the impact is hard to assess in the U. S. content industry, which dominates the worldwide Internet content and platform market. On the other hand, Korea's net neutrality protections have been firmly pursued, and there is no sign of change even after the decision happened in the U. S. Net neutrality is not a simple theme that is associated with the Constitution, such as freedom of expression, as well as the issue of network enhancement to prepare for 5G. Accordingly, this study examines how the net neutrality has been carried out in the U. S. and Korea over the years, and provides the issues of Internet enhancement, perspectives of ISP and ICP, and implications for the Constitution, market economy, fair competition and zero rating. This research delivers future direction and implications of domestic net neutrality policies.

• Strategy21
• /
• s.31
• /
• pp.85-119
• /
• 2013

This paper asks whether the Republic of Korea (ROK) Navy should continue to focus on building ocean-going naval ships when it faces the threats of North Korean provocations in littoral areas. My position is that the ROK Navy should keep pursuing ocean-going capabilities. I provide explanations why it should do so from the perspectives of three important dimensions: capability, doctrine, and organizational identity. First, I argue that the distinction between a littoral navy and an ocean-going navy is an unnecessary dichotomy. It may lead to inefficiency in national security. The military posture should be designed in a way that it can address all external threats to national security regardless of whether they are from North Korea or not. Such capability is the one that the ROK Navy has tried to acquire with the 'Blue Water Navy' initiative since the 1990s. Second, also from the perspective of lately developed military doctrines that emphasize jointness and precision strike capability, ocean-going capabilities such as the mobile task fleet program have become a must, not an option, given today's security situations on and around the Korean peninsula. Lastly, I draw attention to the fact that the 'Blue Water Navy (BWN)' initiative meant more than just capability to the ROK navy. The BWN represents the ROK navy's organizational identity that the navy has defined since the 1980s as it emphasized promoting national interest and international standing as part of its organizational essence. Furthermore, the phrase 'blue water navy' took on symbolic meanings to the people that are associated with South Korean-ness including sovereignty, national pride, standing in the world and hopes for the future. Since 1990s, many scholars and experts have made the case for the necessity of improving South Korea's naval capability based on different rationales. They emphasized the protection of Sea Lines of Communication (SLOCs), the economic value of the sea, the potential danger associated with territorial disputes over islands, and increasing naval power of neighboring countries since the end of the Cold War. This paper adds to this debate by trying to explain the matter with different factors including naval doctrines and organizational identity. Particularly, this paper constitutes a unique endeavor in that it incorporating constructivist elements (that is, identity politics) in explaining a national security matter.