기동헬기 생존장비 설계 및 입증

이병화,김성우,오우섭,구연덕,Lee, Byoung-Hwa,Kim, Sung-Woo,Oh, Woo Seop,Koo, Yeon-Deog 한국군사과학기술학회 2013 한국군사과학기술학회지 Vol.16 No.2

Visual information and aural warning of independent aircraft survivability equipment increase the pilot workload and limit the effective countermeasures. For increase the aircraft survivability, Integrated design of survivability display and aural warning need to consider pilot intuitions. If pilot aware the threat by intuition, evade or escape from the threat using the countermeasures equipment, it will increase the survivability. This paper describe the design and verification of for Utility Helicopter survivability equipment.

Localization Algorithm without Range Information in Wireless Sensor Networks

이병화,엄두섭,Lee, Byoung-Hwa,Lee, Woo-Yong,Eom, Doo-Seop 한국전기전자학회 2007 전기전자학회논문지 Vol.11 No.4

A sensor network is composed of a large number of sensor nodes that are densely deployed in a field. Each sensor performs a sensing task for detection specific events. After detecting this event, location information of the sensor node is very important. Range-based scheme of the proposed approaches typically achieve high accuracy on either node-to-node distances or angles, but this scheme have a drawback because all sensor nodes have the special hardware. On the other hand, range-free scheme provides economic advantage because of no needed hardware even if that leads to coarse positioning accuracy. In this paper, we propose a range-free localization algorithm without range information in wireless sensor networks. This is a range-free approach and uses a small number of anchor nodes and known sensor nodes. This paper develops a localization mechanism using the geometry conjecture (perpendicular bisector of a chord). The conjecture states that a perpendicular bisector of a chord passes through the center of the circle.

브랜드한복 숍의 쇼윈도 이미지 분석

이병화(Byoung-hwa Lee),김경아(Kyung-ah Kim) 아시아민족조형학회 2011 아시아민족조형학보 Vol.10 No.1

The purpose of this study is to upgrade competitive brand-hanbok by analysis of the show-window image related brand-hanbok shop maintaining the distinguished market-image This research method is to taking a photograph of show-windows of brand-hanbok shop in Cheongdam and Apgujeong area. 21 of 80 phtographs were used as final analysis and The research was carried out from October 15 to 25 in 2010. As a result, the show-window was classed as a closed type, a half-open type, a open type and the presentation image was classed as a hanbok primarily image, a hanbok style image, a hanbok and obje-mix image. Presentation products were adult male and female hanboks and many of them were jegori presentation. Craft items were presented as a haam-box, a hoit-dae, a han-gi, a changmoonsal, a yonhwado, a platform, a orchid-pot, etc with traditional image In conclusion, this study suggests the marketing strategy used obje maintaining the image of brandhanbok-shop by the presentation of deginer"s personality and originality.

당의를 응용한 디자인한복 일러스트레이션에 관한 연구

이병화(Byoung-hwa Lee),김이령(I-ryung Kim) 아시아민족조형학회 2011 아시아민족조형학보 Vol.10 No.1

A purpose of this study is to present a method of expressing designed hanboks by fashion illustration, analyzing a dang-eui and applying principles and elements of design. A method of researching this study has been to illustrate designed hanbok by applying elements of the wearing dang-eui and skirt, analyzing principles and elements of these design. As a result, the designed hanbok can be expressed definitely and systematically through principles and elements of the design. Specially, this study has presented a fashion-illustration that a spirit of tradition is expressed naturally in hanbok, so help the Korean who enjoy dressing in hanbok realize succession of traditional costume properly. In conclusion, achievement of this study expect to help make global design idea motive through analyzing and dividing an korean costume, and dressing in designed hanbok comfortably and stylishly help modern people make an opportunity easily experiencing our tradition.

국내 수입탄 촤의 산화반응률 측정을 위한 해석기법 비교

이병화(Byoung-hwa Lee),송주헌(Ju-hun Song),강기태(Ki-tae Kang),장영준(Young-june Chang),전충환(Chung-hwan Jeon) 대한기계학회 2009 大韓機械學會論文集B Vol.33 No.11

Char oxidation experiments were performed with a sub-bituminous roto-middle coal in the Drop Tube Furnace (DTF) at atmospheric pressure condition. While temperatures varied between 900, 1100, 1400 ℃, particle size, mass, particle temperature, and CO/CO₂ concentration were obtained to be used for kinetic analysis of the char oxidation. This study addresses several different methods to analyze the char consumption rate, which are classified as energy balance method, ash-traced mass method, flue-gas based method, and particle size based method. The char consumption rate obtained with such methods was compared with the results of Monson et al.<SUP>(24)</SUP> While there are some differences between them because of differences in experimental apparatus and parameters to be measured, the kinetic results seems to be reasonable enough to be incorporated in a numerical modeling of coal combustion.

O2/N2 와 O2/CO2 분위기에서 석탄의 연소 및 질소산화물의 특성에 관한 연구

이병화(Byoung-hwa Lee),김성곤(Seong-gon Kim),이천성(Cheon-sung Lee),송주헌(Ju-hun Song),장영준(Young-june Chang),전충환(Chung-hwan Jeon) 한국연소학회 2010 KOSCOSYMPOSIUM논문집 Vol.- No.40

The characteristics of combustion and emissions from pulverized coals with O2/N2 and O2/CO2 environment at different O2 concentration (12, 21, 31%) were investigated in an drop tube furnace. Results showed that the char burning rate was faster as O2 concentration was higher and char burning rate with O2/CO2 was decreased those of O2/N2 due to the lower rate of oxygen diffusion into coal surface through the CO2 rich boundary layer. NO concentration increased with increasing O2 concentration, but declined at 31% O2 concentration. On the other hands, NO indexes decreased monotonically with increasing O2 concentration. This facts indicated that the reduction of NO was increased in higher O2 concentration due to formation of HCN. The NO concentration with O2/CO2 was lower than those of O2/N2 entirely due to enhancement of the NO reduction reaction with carbon monoxide. Almost no effect of temperature on NO emission at 1300℃.

한복제품의 인터넷시장 활성화를 위한 웹사이트 분석 연구

이병화(Lee Byoung-hwa) 한복문화학회 2006 韓服文化 Vol.9 No.1

The purpose of this study was to examine websites for the sale of Hanbok in an attempt to step up a successful entry of Hanbok products into online market and to improve the distribution environments of Hanbok market.<br/> Hanbok-related websites and general online shopping malls were analyzed in January 2006 to find out the state of online hanbok market.<br/> As a result, it's found that most of the websites investigated were in the form of homepage. They provided information on their own companies and offered online counseling to customers, and then customers could pay a visit to them in person. The websites that supplied casual hanbok, children's hanbok and lent it gave a chance for customers to do shopping to some extent. As for general online shopping malls, four shopping malls provided hanbok as part of clothes for adults, and seven supplied children's hanbok.<br/> The findings of the study illustrated that the sale of hanbok started to be on the right track in e-market. Therefore, efficient marketing strategies should immediately be prepared to accelerate the fast growth of hanbok market, and more online shopping malls should urgently be set up.

인터넷 쇼핑몰 환경에서 맞춤 한복상품 구매시스템 모형개발

이병화(Lee Byoung-Hwa) 한복문화학회 2011 韓服文化 Vol.14 No.3

The purpose of this study is a maximization of profits of purchaser and enterprise by developing the order made hanbck purchase system. In this study, 6 model compacted requests of purchaser have been offered by adding options on the basic model process of on-line purchase. As a result, model Ⅳ, Ⅴ, connected between virtual image present and pattern-CAD system, have been a high level of system required avatar, video animation and customers body image scan systems, though model Ⅰ, Ⅱ, Ⅲ have been easy way to realization by adding options. In conclusion, developed models present profits to both purchasers and salespersons. In other words, the purchaser can participate designing a hanbok expected to purchase in online and take the order made hanbok. On the other, the salesperson can utilize a purchasers data accumulated in DB and be relieved of a over-stocking by merchandising order production. Also, the order made hanbok will expand in on-line market based on models led to satisfactory purchase by compacting purchaser's request.

센서 네트워크에서 모바일 앵커 노드(헬기)를 이용한 위치인식 알고리즘

이병화(Byoung-Hwa Lee) 한국항공우주학회 2011 韓國航空宇宙學會誌 Vol.39 No.8

센서 네트워크는 보통 넓은 지역에 조밀하게 센서 노드들이 분포되어 있는 형태로 구성된다. 이런 센서 노드들은 광활한 지역에 분포되는 관계로 초기에 헬기 등 기타 항공기를 이용해서 뿌려지는 것이 일반적이다. 각 센서 노드들은 특정 임무를 수행하며 획득된 정보를 자신의 위치 정보와 함께 최종 사용자에게 전달되는 형태로 운용된다. 여기서 노드들의 위치 정보가 필요하다. 본 논문은 센서 네트워크에서 헬기의 비콘 신호를 이용하여 센서 노드 사이의 거리정보를 필요로 하지 않는 알고리즘을 제안하였다. 센서 노도들은 위치를 계산하기 위해 헬기가 보내주는 주기적인 비콘 신호를 수신한다. 비콘 신호를 메모리에 저장하고 있다가 조건에 만족하는 다른 비콘 신호가 수신되면 이를 통해 자신의 위치를 추측한다. 이를 위해 본 논문에서는 기하학적 성질(현의 수직이동분)을 이용하였다. 기존에 존재하는 range-free 방식의 알고리즘과 비교 분석을 통해 제안하는 알고리즘의 정밀성을 입증하였다. Wireless Sensor Network is composed of a lot of sensor nodes that are densely deployed in a field. So generally this sensor nodes are spreaded using Helicopter or Fixed wing. Each node delivers own location and acquired information to user when it detects specific events. In this paper, we propose localization algorithm without range information in wireless sensor network using helicopter. Helicopter broadcasts periodically beacon signal for sensor nodes. Sensor nodes stored own memory this beacon signal until to find another beacon point(satisfied special condition). This paper develops a localization mechanism using the geometry conjecture(perpendicular bisector of a chord) to know own location. And the simulation results demonstrate that our localization scheme outperforms Centroid, APTT in terms of a higher location accuracy.

패션상품 창업 체험교육 프로세스에 관한 연구

이병화(Byoung-Hwa Lee) 한국의상디자인학회 2012 한국의상디자인학회지 Vol.14 No.3