• Structural Engineering and Mechanics
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• v.49 no.4
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• pp.509-521
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• 2014

In this paper two protocols of Wireless Sensor Networks (WSN) are examined through both a simulation and a case study. The simulation was performed with the optimized network (OPNET) simulator while comparing the performance of the Ad-Hoc on demand Distance Vector (AODV) and the Dynamic Source Routing (DSR) protocols. This is compared and shown with real-world measurement of deflection from eight wireless sensor nodes. The wireless sensor response results were compared with accelerometer sensors for validation purposes. It was found that although the computer simulation suggests the AODV protocol is more accurate, in the case study no distinct difference was found. However, it was shown that AODV is still more beneficial in the field as it has a longer battery life enabling longer surveying times. This is a significant finding as a large factor in determining the use of wireless network sensors as a method of assessing structural response has been their short battery life. Thus if protocols which enhance battery life, such as the AODV protocol, are employed it may be possible in the future to couple wireless networks with solar power extending their monitoring periods.

• Proceedings of the Safety Management and Science Conference
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• 2004.05a
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• pp.203-209
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• 2004

Virtual Reality(VR) is a new technology which makes humans communicate with computer. It allows the user to see, hear, feel and interact in a three-dimensional virtual world created graphically. In this paper, we introduced VR into psychotherapy area and developed VR system for the exposure therapy of acrophobia. Acrophobia is an abnormal fear of heights. Medications or cognitive-behavior methods have been mainly used as a treatment. Lately the virtual reality technology has been applied to that kind of anxiety disorders. A virtual environment provides patient with stimuli which arouses phobia, and exposing to that environment makes him having ability to over come the fear. In this study, the elevator stimulator that composed with a position sensor, head mount display, and audio system, is suggested. To illustrate the physiological difference between a person who has a feel of phobia and without phobia, heart rate was measured during experiment. And also measured a person's HR after the virtual reality training. In this study, we demonstrated the subjective effectiveness of virtual reality psychotherapy through the clinical experiment.

• International Journal of Costume and Fashion
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• v.8 no.2
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• pp.1-10
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• 2008

The current study aims to 1) investigate how fashion is perceived in societies that utopian novels were born and 2) what fashion means in utopian worlds by content analyzing two utopian novels, Thomas More�s Utopia and William Morris�N ews from Nowhere. The analyses of More�s Utopia and Morris�s News from Nowhere revealed that both utopian societies made corrections from our (imperfect) societies to increase happiness of people. Dresses of those two utopian societies were described as comfortable, pleasant, and attractive. There was a difference in design in that More considered simple and natural designs as the best whereas Morris considered human processed, labor intensive designs as the most attractive. However, fashion did not exist in either utopian world. It is reasonable to say that utopian societies were anti fashion in general due to the conflicting natures of fashion and utopia.

• IE interfaces
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• v.12 no.2
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• pp.285-293
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• 1999

This paper analyzes the facility investment appraisal process of a real world shipyard and proposes several improving points. For this purpose the investment appraisal sheets are investigated in terms of the theory of the discounted cash flow (DCF) method. Through this investigation, the differences between the theory and its application are clarified and it is tried to resolve the gab by applying the DCF method appropriately including explicit use of actual cash flows in revenue and expense expressions. It is also proposed that some portion of the capital loss caused by defending facility sales may not be the sunk cost and that the portion can conceptually be calculated by the difference between economic value and sales price.

• 한국방재학회:학술대회논문집
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• 2008.02a
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• pp.447-450
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• 2008

A storm surge is gradually increased in the Korean peninsula. Furthermore, this phenomenon is confined not only the Korean peninsula but also the whole world. A storm surge induced by storm, typhoon, or cyclone is a phenomenon that the water surface elevation is raising by the barometric pressure difference and this water level rising threatens the coastal facilities, settlement, or lives. Most of coastal region in our country are unsafe from this disaster. Even though we are not able to prevent the generation of this phenomenon, we can reduce the damages by investigating the kind of storm surge disaster. Once we finish this investigation, we can reduce the damages by offering the information for risk prior to an invasion of storm surge. This study, we analyzed the previously occurred storm surge damages, and this data can be utilized as a guide for those who live near the coastal region providing the information about the predicting scale of the storm surge

• 제어로봇시스템학회:학술대회논문집
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• 2001.10a
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• pp.28.4-28
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• 2001

This paper proposes an IR camera system that performs the task of removing mines for humanitarian purposes. Because of the high risks involved, it is necessary to conduct mine detection from the most remote endeavoring. By mating use of infrared ray (IR) cameras, scattered mines can be detected from remote locations. In the case of mines buried in the ground, detection is possible if the peripheral temperature difference is large enough between the ground and mine weapon. As one of the world´s advanced nations in sensor technology, Japan should promote surveys and studies for detecting mines safely by using its advanced remote sensing technologies.

• Journal of Auto-vehicle Safety Association
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• v.10 no.3
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• pp.45-54
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• 2018

Greenhouse gas is the big issue of the whole world. So foreign countries, EU, USA, Japan, China and Korea made the policy for reducing greenhouse gas. For calculation of reduction, it is necessary to know the quantity of current greenhouse emission per year in Korea. It is not reflected real driving condition for measuring the Fuel economy and greenhouse gas. The subject of this study is to figure out the characteristics which influence on greenhouse gas in real driving condition. And final goal is applying the policy greenhouse emission reduction.

• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.568-569
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• 2008

Recently, the electric power industries around the world are moving from the conventional monopolistic or vertically integrated environments to privatization, deregulation, and competition environments, where each participant is concerned with the maximization of profits in the marketplaces rather than system-wide costs minimization. To reduce difference of viewpoint about power planning between Genco and regulator, adjustment procedures need. This paper presents that game theory can be applied by systematic decision-making means.

• English & American cultural studies
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• v.17 no.1
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• pp.191-206
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• 2017

Langston Hughes (1902-67) and Richard Wright (1908-60) lived in almost the same era, but it is obvious that their ways of describing the people, who are manipulated by gender-based controlling images, are different. Both Wright and Hughes try to reveal how reality is disturbed by the black men's and white women's prevailing stereotypes; however, their works have very different tones. In Richard Wright's short story, "The Man Who Killed a Shadow," and Langston Hughes' poems in his early days, "Silhouette" and "The South," the stereotyped images of black masculinity and white womanhood are transformed and destroyed. While Hughes celebrates the black culture amicably, Wright depicts completely hopeless black men living in the world dominated by white supremacy. This difference is indicative of the shifting views from Harlem Renaissance to Post-Harlem Renaissance. While romantic tones can be still found in Hughes' poems, Wright subverts the power dynamics between the black man and the white woman, and completely ruins sentimentality which tends to be attached to the Southern stories in the $19^{th}$ century.

• KIEAE Journal
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• v.10 no.4
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• pp.117-122
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• 2010

In these days numerous super tall buildings are under construction or being planned in Middle East and Asian countries. Some of them are planned as an ultra high-rise building that goes over 600m tall, including Burj Khalifa, the tallest building in the world. External environment such as wind speed, temperature and humidity of the super tall building varies due to its vertical height. Therefore, it is necessary to consider these environmental changes to estimate building heating and cooling load. This paper analyzes how vertical microclimate difference affects building heating and cooling load in super tall building by simulation using radiosonde climate data. Besides, the correlation between air-tightness of building envelope and building load was analyzed for a super tall building.