• New & Renewable Energy
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• v.17 no.3
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• pp.16-23
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• 2021

Recently, the Korean government announced a plan to activate renewable energies, with focus on clean energy sources such as solar and wind power as the core and the goal of achieving carbon neutrality by 2050. Unlike other photovoltaic (PV) systems, offshore PV installations are advantageous for large-scale expansion because of the ease of securing sites; they also enable lowering the power generation costs based on construction of large-scale power facilities of megawatt class or higher owing to low noise and landscape damage. However, any power generation should proceed with consideration of the special environmental conditions of the ocean. Above all, when installing large-scale facilities, it is important to reduce fluctuations of the structure and secure stability to actively respond to waves. This study is concerned with the development of a floating body technology that actively responds to waves so as to enable commercialization of offshore solar power. A unit platform for research and development on offshore PV generation was installed in the Saemangeum sea, and the structural fluctuations and stability were analyzed to ensure conformity with the major performance indicators.

• Proceedings of the Korea Contents Association Conference
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• 2003.05a
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• pp.255-259
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• 2003

The technique of birdeye image generation of terrain through the use of satellite digital images and digital maps are very important elements and have applications in planning establishment as well as the actual design of several construction work in complex fields. This paper studies stereo perspective image generation as a possibility through 3-dimensional analysis combined with digital elevation data and remotely sensed images. For this, first of all, ortho-images generated by very accurate GCP and DEM from contour file makes 3-dimensional terrain analysis possible and allows stereo-viewing at the highway construction planning sites. So, we developed the technical methods for the 3-dimensional approach on the planning sites of highways by use of perspective orthoimages. From this research diverse terrain analysis is possible through stereo perspective image generation, and can leads to various application in road construction through gain study results from access to realtime virtual spatial on the objects area in korea.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.42 no.10 s.340
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• pp.17-24
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• 2005

This paper propose a new generation method of GRM coefficients using the circulation property of polarity over GF(3). The general method to derive GRM coefficients are obtain the filled polarity of GRM coefficients using RM expansion and expand it for the polarities. Since the general method has many operations when the number of the variables are incremented. Proposed method in this paper simplifies the generation procedure and reduces a number of operators compare to parallel type because of the cyclic property of polarity. Comparing to the proposed papers, the proposed method use only adders without multiplier. So it improves the complexity of the system with efficient composition of the circuits.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.13 no.3
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• pp.109-117
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• 1999

In this paper, improved lamp type ownizer( ILO ), which utilizes the superposition of lamp type ownizer( LO ) and surface discharge operation, is designoo and manufactured for the purpose of characteristic improverrent of an LO employoo for installation of environrrent improverrent and good health using Ultraviolet(U.V.) photochemical reactions Irethoc1s. The ownizer consists of 2 types( LO and ILO ), and owne concentration, owne generation and owne yield were investigated in accordance with discharge power and quantity of suwlioo gas. The results of owne concentration, owne generation and owne yield were ILO > LO. So, owne generation characteristics of the lamp type ownizer were improved. At a discharge power of 19[W], owne concentration, owne generation, and owne yield of the ILO are each improvoo than LO 124[%] at the gas flow $1[\ell/min]$ and 143[%] at the gas flow $1[\ell/min]$. The maximum values of owne concentration, owne generation and owne yield were found as 712[ppm], 128[mg/h] and 6750[mg/kWh] respectively.tively.

• The Journal of the Korea Contents Association
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• v.9 no.10
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• pp.75-101
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• 2009

The purpose of this article is to analyze the needs of middle and elder generation about serious game for the elderly. The results of this study are; (1) elder generation prefers leisure activities such as mountain climbing, yoga, golf, walking and travel, etc., for health, interest, the development for oneself and relieving stress; (2) they don't prefer game activity for leisure, but prefer to use serious game for health, simulation, medical treatment and sports than middle generation; (3) elder generation has various characteristics and needs so that we should consider their demographical variables when we research and develop serious game contents for the elderly.

• 한국HCI학회:학술대회논문집
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• 2008.02b
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• pp.7-12
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• 2008

This study aims to extract the factors which constitute use tendency on digital product, and to devide korean generation. We surveyed to digital product users who are 15 through 49 years old, executed factor analysis, cluster analysis, and so on, The results of factor analysis, we selected 11 factors, named as interest, entertainment, simplicity, anxiety of mal-operation, practicality, personality, consistency, multi-functionality, learning style of how-to-use, responsibility of disorder, and lending degree. The results of cluster analysis, we classified subjects into following three types: positive acceptor, passive follower, and conservative indifference. And, we executed frequency analysis iteratively. We devide korean digital product users to 4 generations -1727G, 2834G, 3538G, 3949G- by means of synthesizing the results. It can be said that generation is strong factor effect to use tendency, but the other factors like sex, occupation, school career, income become weak factor or not matters. Finally, we considered the reason, 3538G takes a crossing point role through comparison the generation division with cohort research on product use experience.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.42 no.5
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• pp.1085-1092
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• 2017

In this paper, we propose a wind forecasting method that reflects wind characteristics to improve the accuracy of wind power prediction. The proposed method consists of extracting wind characteristics and predicting power generation. The part that extracts the characteristics of the wind uses correlation analysis of power generation amount, wind direction and wind speed. Based on the correlation between the wind direction and the wind speed, the feature vector is extracted by clustering using the K-means method. In the prediction part, machine learning is performed using the SVR that generalizes the SVM so that an arbitrary real value can be predicted. Machine learning was compared with the proposed method which reflects the characteristics of wind and the conventional method which does not reflect wind characteristics. To verify the accuracy and feasibility of the proposed method, we used the data collected from three different locations of Jeju Island wind farm. Experimental results show that the error of the proposed method is better than that of general wind power generation.

• Journal of Korean Society for Quality Management
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• v.35 no.3
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• pp.37-46
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• 2007

Our society is increasingly dependent on the Internet, and this trend will be accelerating in the ear of All-IP convergence. As the core infrastructure of the All-IP convergence, the next generation Internet should enable end-to-end Quality of Service(e2e QoS). For that purpose, major international standardization institutes such as ITU(International Telecommunication Union) and IETF(Internet Engineering Task Force) are building the concept and architecture of the Next Generation Network(NGN). However, these institutes focus only on technical issues, and leave many business/policy-oriented challenges unresolved. For example, the standards raised by ITU assume that the entire service delivery process for e2e QoS services is perfectly working. But required is a standardized business interface and process for seamless inter-operations across many stakeholders including ISPs(Internet Service Providers), CPs(Content Providers), so on. On the other hand, TMF(TeleManagement Forum) and QuEST(Quality Excellence for Suppliers of Telecommunication) Forum, global consortiums of telecom operators and vendors, present sets of interface rules and process which playa crucial role as de facto standards: for example, NGOSS/eTOM and TL9000 authorization system. However, these standards focus on telephone services, and provide little principle for the next generation Internet. Our study seeks a way to combine these two strains for a successful implementation of NGN. In particular, we find a missing link in the NGN architecture and the elements that could be complemented with the help of NGOSS/eTOM and TL9000. Finally, presented is a strategic direction that our standardization policy should purse in order to reinforce our global leadership for the next generation Internet.

• International Area Studies Review
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• v.16 no.3
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• pp.367-390
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• 2012

This thesis aims to analyzing the fact that how the Korean troops Intranet impacts on military service satisfaction to give something back to the community by doing time management, mental and physical health care of human resources who are in an army life in their 20's. This is full of suggestions as efficient operation of military service at the national and personal level. Also, this is able to be a guideline that provides useful information about self-discipline to new generation soldiers. This study regards it as meaningful to analyze causes that how the Korean troops Intranet impacts on military service satisfaction and provide information for effective utilization to new generation soldiers in their 20's consisted of the Internet generation at a military organization level. In conclusion, the Intranet has proved as important causes and tools that influence job satisfaction effectively. Also, the fact that the Intranet used in military organization should be developed to be useful to achieve their goal not to simple work or a means of transmission has came up.

• Journal of the Korea Society of Computer and Information
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• v.27 no.9
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• pp.69-76
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• 2022

The traveling salesman problem(TSP) is one of the most famous combinatorial optimization problem. So far, many metaheuristic search algorithms have been proposed to solve the problem, and one of them is local search. One of the very important factors in local search is neighbor generation method, and random-based neighbor generation methods such as inversion have been mainly used. This paper proposes 4 new greedy-based neighbor generation methods. Three of them are based on greedy insertion heuristic which insert selected cities one by one into the current best position. The other one is based on greedy rotation. The proposed methods are applied to first-choice hill-climbing search and simulated annealing which are representative local search algorithms. Through the experiment, we confirmed that the proposed greedy-based methods outperform the existing random-based methods. In addition, we confirmed that some greedy-based methods are superior to the existing local search methods.