• Journal of Chest Surgery
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• v.26 no.2
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• pp.102-107
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• 1993

Human atria play an important role in extracellular homeostasis through release of atrial natriuretic peptide. To evaluate the relationship between plasma level of atrial natriuretic peptide (ANP) and many changes which can develop during extracorporeal circulation, we studied 16 patients undergoing, 12 cardiac operation and 4 thoracic operation. Plasma level of ANP in cardiac patients group was significantly higher and more changeable than thoracic patients group. After aortic cross clamp release, blood was filled at right atrium and right atrial pressure was rapidly increased. At the same time, plasma level of ANP was rised suddenly. Increase of ANP level was correlated (p<0.05) with the increase of total bypass time, but was not correlated statistical with aortic cross clamp time. ANP level did not fall rapidly after aortic cross clamp while both atria were completely empty. This result was explained by intraoperative hypothermia at that time, which can inactivate plasmal endopeptidase and catalytic receptors of ANP. The ANP level of atrial fibrillation group in cardiac patients were generally higher than normal sinus group, but there was no statistical correlation.

• The Transactions of the Korean Institute of Electrical Engineers D
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• v.54 no.3
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• pp.141-147
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• 2005

In the field of electrical industry, embedded computing environment including hardware and software is getting more important as the industry shifts to the knowledge-based one. Java could play a great role as bridging technology in such a transition because it provides a lot of benefits like dynamic application download, compatibility of cross platform, and its own security solution. However, the Java technology has a limitation of real-time problem when it is applied to the embedded computing system of the electrical industry. To solve the problem, a novel java-native combination model has been proposed and designed to a firmware level. This scheme has been employed in four kinds of control boards. The result shows that the proposed model has great potential to implement the real-time processing in control of the devices.

• Ocean policy research
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• v.33 no.2
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• pp.25-55
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• 2018

Cold storage and transportation facilities play major roles in the implementation of fishery cold chain systems. Most fishes are more easily perishable than other food products such as agricultural products and livestock products. Therefore, fishery cold chain systems were earlier introduced than other food clod chain systems. It is acknowledged that a reefer ship as a component of cold chain systems was used in the fishery transportation in the Joseon Dynasty. But researchers disagree on the introduction time of a fishery reefer ship. This study investigated the introduction time of a fishery reefer ship by some conditions including the number of private cold storage facilities, the magnitude of fishing vessels, and the plenty catch of fish species. According to reviewing the introduction conditions of fishery reefer ships, it was estimated that fishery reefer ships were introduced in 15th century. Therefore, the introduction time of a fishery reefer ship is more advanced about 300 or 400 years than as we know.

• The Transactions of the Korean Institute of Electrical Engineers P
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• v.64 no.4
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• pp.199-206
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• 2015

A rising attention is paid to the railway system in many countries. KOREA is also of the opinion that the railway has to play a more important role in the near future to face up to the problems that increase gradually in the transport sector. To attract more traffic to the rail networks, it is important for rail modes to have running time competitiveness. Tilting trains, where it is possible to tilt the car-body towards the center of the curve, are a less expensive alternative to shorten travelling times on existing lines. Running time for tilting train is one of the most important factors, with which passenger demand forecasting or economic feasibility analysis will be done. This paper evaluates the speed limitation of tilting train around curves and also presents calculation process of its simulated possible running time. Then the adequacy of estimated time is verified with running time for Korean protype tilting train TTX (Tilting Train eXpress) by actual test run. As a case study, the estimated running time for the production version of tilting train and its time saving are presented compared with 2012's conventional Saemaul trains and non-tilting trains on the Gyeongbu line in the Korean rail network.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.13 no.11
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• pp.2273-2276
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• 2009

As parents are interested in music education for infants in these days, they require systems to help these infants to actively play music. In this paper, we propose a keyboard solo system using a real time hand recognition method. In order to enable the infants to use the system easily, the proposed system plays some sounds whenever the infants move their fingers on a paper piano. For the purpose of minimizing cost to play music, the proposed system utilizes a general PC with only a paper piano, a web camera, and a speaker. With the aim of precisely and efficiently recognizing both a hand and each key on keyboard, the proposed system divides a recognition step into a hand recognition step and a keyboard recognition step. Also, the hand recognition step considers only skin color, and the keyboard recognition step considers only black and white without other colors.

• Journal of the Korean Society of Clothing and Textiles
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• v.34 no.2
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• pp.336-344
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• 2010

Stage costumes are characterized by the importance as a medium of total visual expression on a synthetic art and need to be designed more effectively. This study followed the stage costumes of the play 'Long long time ago whuo-ee whuoee' which participated in the China-Japan-Korea University Theatre Festival. By consisting of the framework of a Korean story that tells and expands the visual expression province by the access method of a producer, the unique costume in the play was created by the dyeing of the traditional hangi. First, the use of hanji in theater represents originality and a fresh variation with the formative beauty of stage costumes in accordance with hanji that conforms to the recreation of tradition. Second, the dip dyeing technique made it possible to express colors limitlessly and the airbrush dyeing technique along with dyeing twice could account for the weak points of the color. As a result, the color brought effect as expected. Third, the weak points were supported by a Jumchi technique that created the fibroid material tangled with stronger adhesion in the creation of a hangi costume. In addition, dyed hangi was attached to the outer fabric. It allowed the costume to have a unique texture that was both soft and tough. This enforced the visualization of the costume and durability to prevent possible damage by the performers. Forth, pieces of hanji were attached to the damaged parts of the costume after re-visiting the dress rehearsal. As a result, the stage costumes represented the shabby clothes that express the social class of the characters. A new understanding of the excellence of traditional hanji was found and confirmed the possibility of it as a material for stage costumes through the study.

• Journal of Korea Society of Digital Industry and Information Management
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• v.13 no.2
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• pp.13-25
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• 2017

Recently, the high performance of tactical situation display console and tactical data links are used to integrate the operational situations in accordance with information age and NCW (Network Centric Warfare). The tendency to maximize the efficiency of task execution has been developed by sharing information and the state of the battle quickly through complex and diverse information exchange. Tactical data link is a communication system that shares the platform with core components of weapons systems and battlefield situation between the command and control systems to perform a Network Centric Warfare and provides a wide range of tactical data required for decision-making and implementation.It provides the tactical information such as tactical information such as operational information, the identification of the peer, and the target location in real time or near real time in the battlefield situation, and it is operated for the exchange of mass tactical information between the intellectuals by providing common situation recognition and cooperation with joint operations. In this study, still image management, audio file management, tactical screen recording and playback using the storage and playback, NITF (National Imagery Transmission Format) message received from the displayer integrates the tactical situation in three dimensions according to multiple data link operation to suggest ways to ensure data integrity between the data link processor during the entire operation time.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.22 no.10
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• pp.1340-1346
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• 2018

There have been researches on game continuance intention based on consumer behaviour theory of management science. Such macro access of computer game analysis might be insufficient to draw valuable results due to complex subsystem structure of recent computer games. In this paper, we choose 'Blade and Soul' game that was first published in 2012 and has been within top 20 MMORPG in Korea but known as a 'long time users' only game'among game players recently. Three user groups - long loyalty, concentrated, casual - are classified based on their play history and play time per day of Blade and Soul. The first survey with 222 subjects revealed that the real strength of the game was not the combat - Dungeon, Arena, Battleground competition - but very cohesive game community Blade and Soul has. Thus, we conduct another survey on the game community issues among 148 long time users (over 3 years playing history) and analyze their traits and behaviour patterns.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.19 no.3
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• pp.301-308
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• 2001

Nowadays GPS play a important roles in the navigation system of vehicles, but, it doesn't determine the kinematic positions of vehicles accurately because of few satellites in the urban canyon covered with trees and high buildings. So GLONASS (GLObal Navigation Satellites System), the Russian satellites'system, operated in 1996, was introduced to overcome this drawbacks. Therefore, this study deals with the kinematic positioning of vehicles with Real-time code differential positioning methods. As a result, Real-time DGPS/GLONASS is better than Real-time DGPS in the differential corrected positions and HDOP (Horizontal Dilution of Precision). And it was shown that the combined GPS/GLONASS contributes to the precise kinematic positioning of vehicles.

• Journal of the Korean Home Economics Association
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• v.50 no.8
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• pp.13-19
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• 2012

The present study explored the hours of living and playtime depending on existence of caregiver after school using the data from the Korean Children and Youth Panel Survey7071. KCYPS date collected on 1th, 4th and 7th grade children and their caregivers. The hours of living was categorized into sleeping, learning, reading and play times. Playtime was sub-categorized into time for using playing the computer/games, watching TV/DVD and playing with peer groups. The present study has shown that children in the fourth grade spent more time on learning, whereas reading children in the seventh grade spent more time on playing compared to those in other grades during the weekdays. Also, children in higher grades spent more time playing both on the weekdays and on the weekends. Students of all grades spent more time watching TV/DVD compared to other activities during the weekdays and the weekends. Children with a caregiver spent more time on learning and spent less time playing computer/game, watching TV/DVD and playing with peer groups than children without caregivers. As students moved up a grade, these results clearly appeared. Considering the results in this study, the allocation of hours of living and playtime of children altered depending on the existence of a caregivers.