• The Journal of the Korea institute of electronic communication sciences
• /
• v.4 no.3
• /
• pp.176-182
• /
• 2009

The dissertation on today information communication technique development consist according to new broadcasting and communication appearanced fusion-service in earnest legislation's change about broadcasting and communication regulate the while separation On that score, radio wave law's change on environment change has been lively producing.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.23 no.11
• /
• pp.1434-1442
• /
• 2019

In this paper, the channel change was continuously measured for 24 hours from July 5, 2017 on the coast near Deokjeok-do, Incheon. The underwater channel has various channel environment characteristics as the change in the time axis and the change in the frequency axis occurs in real time, and the underwater communication performance decreases due to the multipath fading and the Doppler effect. Therefore, in this study, we performed the OFDM system performance analysis in the underwater channel environment by applying the repetitive transmission diversity scheme in the time and frequency domain to improve the communication performance in the real-world underwater communication environment. Using the collected data, we compared the channel environment in the time and frequency domain and analyzed the BER performance according to the pilot spacing and the number of repetitive transmissions in the time and frequency axis.

• Journal of the Korean Society of Earth Science Education
• /
• v.12 no.1
• /
• pp.18-26
• /
• 2019

Vietnam is one of the countries most affected by climate change. Therefore, communication activities on climate change in Vietnam are focused with various media such as television, newspapers, radio, internet etc. In particular, Facebook social network is a potential media but less interested and developed. In this topic, Audience Insight tool of the Facebook social network and the online sociological survey method were conducted to assess the current status and effectiveness of climate change communication activities via Facebook in Vietnam today. Vietnam ranks seventh in the world with 58 million users. However, the number of climate change communication fanpages has only about 15 fanpages with the largest number of followings is 94,721 persons. Among of the 10 most contented Facebook users in Vietnam today, there is no fanpage related to climate change. The results of research and evaluation two fanpages of climate change communication that are the most and most frequent followers in Vietnam showed that climate change communication via Facebook in Vietnam is not as effective as expected. At the same time, online survey results also pointed out the causes of the above problems. This is the scientific basis for management agencies to find the solutions to promote the strength of Facebook social network in climate change communication in the future.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.6 no.7
• /
• pp.1044-1047
• /
• 2002

In this study, proposes development present condition of fishery information communication system and development direction of communication system by fishery environment change

• The Journal of the Korea institute of electronic communication sciences
• /
• v.4 no.1
• /
• pp.1-6
• /
• 2009

The dissertation on today information communication technique development consist according to new broadcasting and communication appearanced fusion-service in earnest legislation's change about broadcasting and communication regulate the while separation. on that score, radio wave law's change on environment change has been lively producing.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2002.11a
• /
• pp.515-517
• /
• 2002

In this study, proposes development present condition of fishery information communication system and development direction of communication system by fishery environment change.

• Proceedings of the KIPE Conference
• /
• 2004.07a
• /
• pp.38-41
• /
• 2004

Artificial intelligence control that use Fuzzy, Neural network, genetic algorithm etc. in the speed control of induction motor recently is studied much. Also, sensors such as Encoder and Resolver are used to receive the speed of induction motor and information of position. However, this control method or sensor use receives much effects in surroundings environment change and react sensitively to parameter change of electric motor and control Performance drops. Presume the speed and position of induction motor by ANN in this treatise, and because using FMRLC that is consisted of two Fuzzy Logic, can correct Fuzzy Rule Base through teaming and save good response special quality in change of condition such as change of parameter.

• Journal of Environmental Impact Assessment
• /
• v.18 no.6
• /
• pp.347-357
• /
• 2009

This study conducted a vulnerability assessment on Korea's physical infrastructure to provide base data for developing strategies to strengthen Korea's ability to adapt to climate change. The assessment was conducted by surveying professionals in the field of infrastructure and climate change science. A vulnerability assessment was carried out for seven climate change events: average temperature increases, sea level rise, typhoons and storm surges, floods and heavy rain, drought, severe cold, and heat waves. The survey asked respondents questions with respect to the consequences of each climate change event, the urgency of adaptation to climate change, and the scale of investment for adaptation to each climate change event. Thereafter, management priorities for infrastructure were devised and implications for policy development were suggested. The results showed that respondents expected the possibility of "typhoons and storm surges" and "floods and heavy rain" to be the most high. Respondents indicated that infrastructure related to water, transportation, and the built environment were more vulnerable to climate change. The most vulnerable facilities included river related facilities such as dams and riverbanks in the "water" category and seaports and roads in the "transport and communication" category. The results found were consistent with the history of natural disasters in Korea.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.3 no.3
• /
• pp.183-187
• /
• 2008

In this study, proposes development present condition of fishery information communication system and development direction of communication system by fishery environment change.

• Journal of the Korea Furniture Society
• /
• v.22 no.2
• /
• pp.91-100
• /
• 2011

Communication has increasingly become important between peoples in the modern society. The change in the composition of a family brought by urbanization and industrialization caused structural changes in the society, and the lack of communication between people have incited various social conflicts rising from individualism and ego-centrism. Thus in this era, domestic environment is one of the most significant environment that enables one to transform into an appropriate member of the social community as well as develop appropriate traits of one. The living room, which served as an arena of communication for family members is now replaced with TV, a popular media, and has lost its original role in the house. The living room furnitures today are designed to facilitate people in viewing TV, not to enhance communication between family members. Thus in this research, I would like to propose a new concept of 'communication furniture' and various examples to suggest appropriate, desired role of living room furniture in households today. In addition, I hope this research contributes to forming a beneficial living room culture and a domestic environment as well as a heart-warming, human society.