한반도 대운하-인간과 자연, 일터와 쉼터가 어우러지는 21세기 다목적 프로젝트

박승환,Park, Seung-Hwan 한국기술사회 2008 技術士 Vol.41 No.2

The construction of korea grand canal supplys nation as below:$\Delta$ return to clean and clear river $\Delta$ offer urbanite space for re-charging $\Delta$ offer local resident tourist attractions $\Delta$ alternative for global warming $\Delta$ economic project for development and growth $\Delta$ awake sleeping inland city $\Delta$ strengthen business competitiveness $\Delta$ reduction of logistic cost

사례 분석을 통한 IoT 기반 화재탐지시스템의 화재 감지신호 특성

박승환,김두현,김성철,Park, Seung Hwan,Kim, Doo Hyun,Kim, Sung Chul 한국안전학회 2022 한국안전학회지 Vol.37 No.3

This study aims to provide a fundamental material for identifying fire and no-fire signals using the detection signal characteristics of IoT-based fire-detection systems. Unlike analog automatic fire-detection equipment, IoT-based fire-detection systems employ wireless digital communication and are connected to a server. If a detection signal exceeds a threshold value, the measured values are saved to a server within seconds. This study was conducted with the detection data saved from seven fire accidents that took place in traditional markets from 2020 to 2021, in addition to 233 fire alarm data that have been saved in the K institute from 2016 to 2020. The saved values demonstrated variable and continuous VC-Signals. Additionally, we discovered that the detection signals of two fire accidents in the K institution had a VC-Signal. In the 233 fire alarms that took place over the span of 5 years, 31% of smoke alarms and 30% of temperature alarms demonstrated a VC-Signal. Therefore, if we selectively recognize VC-Signals as fire signals, we can reduce about 70% of false alarms.

여성전문병원 병동부의 거주성 향상을 위한 건축 계획적 연구

박승환,홍성우,최무혁,Park, Seung-Hwan,Hong, Sung-Woo,Choi, Moo-Hyuck 한국주거학회 2007 한국주거학회 논문집 Vol.18 No.2

The purpose of this study was to provide the basic data for architectural planning through survey about the ward of women's hospital. This study considered the concept of women's hospital through theoretical consideration and analysed a blueprint of 30 cases about typical plan type, the size and layout of patient-room, space allocation and circulation. And then a survey of patients has to identify their needs. Because the rate of composition of an upper grade patient-room in women's hospital is higher than that of general hospital to improve habitability in ward needs not only the importance of the planing of patient-room itself, but also providing a small courtyard, day-room between the patient-rooms or outdoor terrace. When patient moves it was provided visual comfort and strengthen social exchange. Also, physical environment has to reflect mother's psychological needs and diversity by individuality in unit is essential to planning.

Wireless LAN 환경에서 임베디드 SIP User Agent 구현

박승환,이재흥,Park Seung-Hwan,Lee Jae-Heung 한국정보통신학회 2005 한국정보통신학회논문지 Vol.9 No.3

본 논문은 무선의 임베디드 시스템 환경에서, VoIP 시스템을 구성하는 프로토콜 요소 중의 하나인 SIP를 이용한 User Agent의 구현에 관한 연구이다. User Agent는 설정 블록과, 주변 장치를 제어하기 위한 디바이스 쓰래드 블록, SIP 메시지를 처리하기 위한 SIP 스택 블록으로 구성하였다. 디바이스 쓰래드는 RTP 쓰래드 블록과 사운드 카드 처리 블록으로 구성하였으며, SIP 스택은 프락시 이벤트를 처리하는 워커 쓰래드 블록과 SIP 메시지를 전송하여 처리하는 SIP 트랜시버 및 SIP 쓰래드 블록으로 구성하였다. 하드웨어 플랫폼은 Intel XScale PXA25S 프로세서 기반에 플래쉬 메모리, SDRAM, AC'97 오디오 코덱, 무선 랜카드와 연결된 PCMCIA 소켓이 내장된 보드를 구성하였으며, 오디오 입출력으로 마이크로폰과 헤드폰을 사용하였다. 본 연구의 실험을 위한 타겟 시스템 구성은 임베디드 리눅스 커널 2.4.19를 포팅하였다. 임베디드 시스템의 자원 효율을 높이고자, User Agent의 속성과 SIP 메소드의 기능을 최소화하였고, TCP를 배제하여, 주변 장치 제어를 최소화함으로써, 자원의 소비를 $12.9\%$ 절감할 수 있었다. This paper is about the research of the User Agent implementation under wireless embedded environment, using SIP which is one of protocol components construct the VoIP system. The User Agent is made of the User Agent configuration block, the device thread block to control devices and the SIP stack block to process SIP messages. The device thread consists of the RTP thread and the sound lard device processing block. Futhermore, the SIP stack consist of the worker thread to process proxy events, the SIP transceiver and SIP thread to transfer and receive SIP messages. The H/W platform is a board included the Intel's XScale PXA255 processor, flash memory, SDRAM, Audio CODEC module and wireless LAN threough PCMCIA socket, furthermore a microphone and headphone is used by the audio 1/0. The system has embedded linux kernel 2.4.19. For embedded environment, the function of User Agent and SIP method is diminished. Finally, the resource of system could be reduced about $12.9\%$, compared to overall system resource, by minimizing peripherals control and excepting TCP.

도심지내 분수유형별 음이온 분포 및 상관성 분석

김정호 ( Jeong Ho Kim ),박승환 ( Seung Hwan Park1 ),김원태 ( Won Tae Kim ),윤용한 ( Yong Han Yoon ) 한국환경과학회 2013 한국환경과학회지 Vol.22 No.12

In order to verify the healing effect in the variety of effects according to fountain type, anion which is the representatives factor of healing, as the center of case studies which in Gwanghwamun(Ground fountain), Cheonggyecheon(Waterfall) and Myeongdong(Formative fountain). According to fountain type, the anion distribution as follow, figures typically 15,721 ± 419 ea/cm³, Formative fountain 40,190 ± 788 ea/cm³, Waterfall 4,480 ± 290 ea/cm³ and ground fountain 2,492 ± 180 ea/cm³. It is usually exceed to the distribution in natural green, which is 1070∼2100 ea/cm³. The interrelation between air temperature, relative humidity, wind speed and relative humidity, and wind speed is that, the relative humidity is directly proportional to wind speed and inversely proportional to temperature. As the temperature goes up, the distribution of anion goes down. And as the wind speed and relative humidity goes up, the distribution of anion decrease sharply. The result of interrelation between fountain type and the anion distribution is that, the distance of water falling is directly proportional to the anion distribution in the formative fountain and inversely proportional in the ground fountain. And the distribution of anion is largest in formative fountain. The distribution of anion in ground fountain is lower than in formative fountain, but it is far more than in natural greenery. And as the distance from fountain increase, the distribution of anion goes down.

사설 골프연습장 회원들의 사회적 특성과 고객행동의 차이 분석

박승환(Park Seung-Hwan),최영수(Choi Young-Soo) 한국체육과학회 2009 한국체육과학회지 Vol.18 No.4

The objectives of this study are to clarify how the marketing mix affects the on customers’ behaviors To achieve these objectives, we analyzed the causal relations. As a result, this study came to the following conclusions: from the results of analyzing customer’s behavior which is one of the golf course users’ demographic social features, differences were found like the following. As for gender, there was difference between groups, men, as for customer satisfaction those who are over 50 years, as for customers’ loyalty those who are less than 40 to 49 years, as for occupation the self-employed, as for school career only in customer’s satisfaction people who have under high school graduate diplomas, as for monthly income of customers’ behaviors.

Application of data-driven control charts in semiconductor packaging process

Seung Hwan Park(박승환),Seongwon Jang(장성원),Sang-Hoon Park(박상훈),Jun-Geol Baek(백준걸) 한국경영과학회 2016 한국경영과학회 학술대회논문집 Vol.2016 No.4

함황철석 안산암 내 단층 비지의 광물학적 및 지구화학적 연구

박승환 ( Seung Hwan Park ),김영규 ( Yeong Kyoo Kim ) 한국광물학회 2014 광물과 암석 (J.Miner.Soc.Korea) Vol.27 No.4

황철석이 다량 존재하는 지역에서 산성암석배수에 의한 중금속 거동과 관련된 단층비지의 역할을 알아보기 위해, 양산지역에 분포하는 함황철석 안산암의 모암과 단층비지에 대하여 XRD, pH, XRF, SEM-EDS, ICP 분석을 실시하였다. 연구결과 모암의 주 구성광물로 석영(quartz), 엽랍석(pyrophyllite), 황철석(pyrite), 일라이트(illite), 황옥(topaz)이 관찰되었고 짙은 갈색의 단층비지 시료의 경우 석영(quartz), 일라이트(illite), 녹니석(chlorite), 스멕타이트(smectite), 침철석(goethite), 카콕세나이트(cacoxenite)가 동정되었으며 침철석이 주 구성광물이었다. 모암에서 동정된 광물 종으로 보아 모암은 열수 변질 작용을 많이 받은 것으로 보인다. ICP분석 결과 각 시료의 중금속 농도는 모암의 경우Zn > As > Cu > Pb > Cr > Ni > Cd 순을 보였으며, 단층비지의 경우 As > Zn > Pb > Cr > Cu >Ni > Cd 순으로 나타났다. 두 시료를 비교해 보면 중금속의 총량은 전체적으로 단층비지에서 상대적으로 더 높은 값을 나타내며 특히 Pb, As, Cr은 2배 이상의 큰 차이를 보인다. 이러한 차이는 단층비지의 주 구성광물인 침철석의 높은 반응성과 넓은 표면적에 의해 Pb, As, Cr과 같은 중금속들이 공침혹은 흡착되어 특히 높은 농도를 나타내며 또한 황철석의 산화에 의한 낮은 pH에 의하여 이러한 효과가 더욱 증가되었다고 사료된다. 그리고 자연환경에 쉽게 영향을 줄 수 있는 labile (step 1)과 acid-soluble (step 2)을 합한 농도의 비율은 대부분의 중금속이 모암에서 더 높게 나타나는 것을 확인하였다. 결과적으로 연구지역에서 단층비지는 모암에 비하여 많은 양의 중금속을 함유하고 연속추출법 단계 중 상대적으로 자연에 쉽게 유출될 수 있는 단계의 비율이 낮은 것으로 나타나 산성암석배수에 의한 피해가 예상되는 지역에서 단층비지는 중금속이 쉽게 용출되지 않게 하는 저장소로 큰 역할을 하는 것으로 판단된다. To investigate the role of fault gauge in the behavior of heavy metals caused by the acid rock drainage in the area of pyrite-rich andesite, XRD, pH measurement, XRF, SEM-EDS, ICP, and sequential extraction method were used. Bed rock consists of quartz, pyrophyllite, pyrite, illite, and topaz, but the brown-colored fault gouge is composed of quartz, illite, chlorite, smectite, goethite, and cacoxenite. The mineral composition of bed rock suggests that it is heavily altered by hydrothermal activity. The concentrations of heavy metals in the bed rock are as follows, Zn > As > Cu > Pb > Cr > Ni > Cd, and those in fault gouge are As > Zn > Pb > Cr > Cu > Ni > Cd. The concentrations of the heavy metals in the fault gouge are generally higher than those in the bed rock, especially for Pb, As, and Cr, which were more than twice as those in the bed rock. It is believed that the difference in the amount of heavy metals between the bed rock and the fault gouge is mainly due to the existence of goethite which is the main mineral composition in the fault gouge and can play important role in sequestering these metals by coprecipitation and adsorption. The low pH, caused by oxidation of pyrite, also plays significant role in fixation of those metals. It is confirmed that the fractions of labile (step 1) and acid-soluble (step 2), which can be easily released into the environment, were higher in the bed rock. Those fractions were relatively low in fault gauge, suggesting that fault gauge can play important role as a sink of heavy metals to prevent those ones from being released in the area where the acid rock drainage can have an influence.

스크린 골프장의 마케팅믹스와 고객만족 및 충성도의 관계

박승환(Park Seung-Hwan),최영수(Choi Young-Soo) 한국체육과학회 2010 한국체육과학회지 Vol.19 No.1

The objectives of this study are to clarify how the marketing mix affects the customers’ satisfaction and loyalty. These show that the core factors among screen golf course marketing mix to raise customer’s satisfaction are product and price. So, the screen golf course should provide good quality products and offer understandable price to its customers. Also it was found that to raise customer’s loyalty which is the core factor, even though the loyalty becomes intensified spontaneously as the customer’s satisfaction in product vs price and price vs product are high, the marketing strategy with active promotion can encourage customer satisfaction.

Measurement of the particulate matters removal by AHU

Park Seung-Hwan(박승환),Song Doo-sam(송두삼) 한국태양에너지학회 2016 한국태양에너지학회 학술대회논문집 Vol.2016 No.10