GPU를 이용한 이방성 탄성 거꿀 참반사 보정의 계산가속

최형욱 ( Hyungwook Choi ),설순지 ( Soon Jee Seol ),변중무 ( Joongmoon Byun ) 한국지구물리·물리탐사학회 2015 지구물리와 물리탐사 Vol.18 No.2

To yield physically meaningful images through elastic reverse-time migration, the wavefield separation which extracts P- and S-waves from reconstructed vector wavefields by using elastic wave equation is prerequisite. For expanding the application of the elastic reverse-time migration to anisotropic media, not only the anisotropic modelling algorithm but also the anisotropic wavefield separation is essential. The anisotropic wavefield separation which uses pseudo-derivative filters determined according to vertical velocities and anisotropic parameters of elastic media differs from the Helmholtz decomposition which is conventionally used for the isotropic wavefield separation. Since applying these pseudo-derivative filter consumes high computational costs, we have developed the efficient anisotropic wavefield separation algorithm which has capability of parallel computing by using GPUs (Graphic Processing Units). In addition, the highly efficient anisotropic elastic reverse-time migration algorithm using MPI (Message-Passing Interface) and incorporating the developed anisotropic wavefield separation algorithm with GPUs has been developed. To verify the efficiency and the validity of the developed anisotropic elastic reverse-time migration algorithm, a VTI elastic model based on Marmousi-II was built. A synthetic multicomponent seismic data set was created using this VTI elastic model. The computational speed of migration was dramatically enhanced by using GPUs and MPI and the accuracy of image was also improved because of the adoption of the anisotropic wavefield separation.

브랜드 이미지 및 구매에 영향 미치는 체험 특성에 관한 연구 -국내 화장품 플래그쉽 스토어를 중심으로-

최형욱 ( Choi Hyungwook ),김주연 ( Kim Jooyun ) 한국공간디자인학회 2020 한국공간디자인학회논문집 Vol.15 No.7

(Background and Purpose) The experience of a flagship store space changes the positive emotion of the customer’s brand and the result is brand marketing and identity formation through experience. In this respect, experiential characteristics are very important areas in the brand image and product purchase of the flagship store space, and the emotional elements of the buyer are induced to purchase through space experience. Therefore, the purpose of this study is to present the characteristics of experience in a dense manner based on the experience analysis frame for the characteristics and contents of experience that affect the brand image and purchase decision of a cosmetics flagship store space. (method) The study was conducted on the top six brands identified as a result of the statistics of the cosmetics brand recognition presented by the Korea Consumer Agency in 2019. To obtain objective results, a direct survey was conducted on the stores to analyze the contents through interviews, and characteristics of experiential details were classified into each and all stores. (Result) In the process of purchasing through visits to the cosmetics brand flagship store, it was analyzed that the emotional item evaluation factor among the characteristics of the sampling through the store space had a high influence on the brand image and purchase, and the other evaluation factors were analyzed in the order of experientialness, convenience, and intimacy. In the evaluation factors of sensory items among experience characteristics, visual was the most influential factor, followed by tactile sense, smell, and hearing. In addition, story and differentiation have a significant influence on the evaluation factors of cognitive items, and it was analyzed in order of interest and accessibility. Functional and physical properties had the highest influence on evaluation factors among behavioral characteristics, followed by selectivity and necessity. Moreover, in relational characteristics, the influence on identity and branding formation was high, and it was analyzed in order of community and mutuality. (Conclusion) The research questions on how the experience characteristics affect the brand image and product purchase of domestic cosmetics brand flagship stores were analyzed and synthesized through interviews. Through these results, it is recognized that the experience characteristics of cosmetics brands plays a very important role as a direct influence on brand image form and product purchase, and it is important data for future cosmetics flagship store planning, design, and research.

화장품 플래그쉽 스토어 공간의 다감각 환경 특성에 관한 연구

최형욱 ( Choi Hyungwook ),김주연 ( Kim Jooyun ) 한국공간디자인학회 2020 한국공간디자인학회논문집 Vol.15 No.8

(Background and Purpose) The multi-sensory environment of store space plays an important role in the image and purchase of cosmetics flagship stores. Therefore, the study on the detailed items, elements, and factors of multisensory environment characteristics is necessary. Cosmetic flagship stores play an important role as a place for product purchase based on consumer experience, so multi-sensory stimulus factors felt by buyers in space are directly related to the formation of atmosphere, maximization of purchase, and promotion of brand preference, which are significant matters in purchasing. Therefore, this study aims to classify and analyze multi-sensory items and detailed factors for representative cosmetics brand flagship stores in Korea and abroad, and to present the results of the effect on the atmosphere, purchase, and preference in detail. (Method) The scope of the study was set as the subjects of the study for the top six brands with high recognition of cosmetics brands in 2019 based on the statistical data of the Korea Cosmetics Industry Research Institute and the Korea Consumer Agency among domestic and foreign cosmetics brands. The results of the analysis of the composition of the store space and the analysis of multi-sensory elements were conducted, and the results of the atmosphere, purchase, and preference were applied and classified using the Likert scale. (Result) In the atmosphere factor, it was analyzed that the visual color, brightness and tactile sense, and material had the main influence, and the factors that showed moderate influence were analyzed as the size of the visual base and the smell based scent. In addition, the factors that showed the least influence were the sound of music, temperature, and humidity, based on the olfactory sense. As such, the multi-sensory environment characteristics in the cosmetics brand flagship store space have an effect on the atmosphere, preference, and purchase of each factor of the five senses, and these results were summarized as having a significant effect on the brandingscape and identity formation of the cosmetics brand. (Conclusion) In summary, the space of the cosmetics brand flagship store has a very high impact on the store space atmosphere, brand preference, and purchase by the multi-sensory environment characteristics of the human body. The results obtained through various human sensory organs have a significant influence on the image and purchase of the brand in the future, and therefore, it is necessary to utilize it actively to maximize marketing by presenting space design and creative experience programs that enhance the purchasing effect.

다중 센서 데이터를 활용한 시약장 위험상황 식별 시스템

이현주,최형욱,정회경,Lee, Hyunju,Choi, Hyungwook,Jung, Hoekyung 한국정보통신학회 2018 한국정보통신학회논문지 Vol.22 No.1

최근 실험실에서 발생하는 안전사고가 다양한 형태로 발생함에 따라 실험실의 안전사고를 줄일 수 있는 시스템이 요구되고 있다. 기존 시스템은 온도, 습도의 변화에 따라 위험상황을 식별하지만 위험상황의 유형을 알 수 없고 기기의 동작이 수동으로 이루어지는 단점이 있다. 이에 본 논문에서는 다중 센서를 활용하여 시약장의 위험상황을 식별하고 기기를 자동으로 동작시키는 시스템을 제안한다. 시약장의 내부 환경은 센서들을 통해 실시간으로 측정되며 센서 데이터는 위험상황을 식별하는 것에 활용된다. 또한 위험상황이 식별되었을 경우 이에 맞는 기기를 선택하고 자동으로 동작시킨다. 이와 같이 시약장의 위험상황을 식별하고 기기를 자동으로 동작시킴으로써 시약장에서 발생하는 안전사고를 줄일 수 있을 것으로 사료된다. Recently, safety accidents that occur in laboratories have occurred in various forms, so that a system that can reduce safety accidents in laboratories is required. The existing system identifies the danger situation according to the change of the temperature and the humidity, but the type of the danger situation is not known and the operation of the device is manually performed. Therefore, in this paper, we propose a system that identifies the danger situation of a reagent cabinet using multiple sensors and automatically operates the device. The internal environment of the reagent cabinet is measured in real time through the sensors and the sensor data is used to identify the danger situation. Also, when a danger situation is identified, the appropriate device is selected and operated automatically. In this way, identification of the danger situation of the reagent cabinet and automatic operation of the device will reduce the safety accidents occurring in the reagent cabinet.

시약의 성상에 따른 시약 관리 시스템

최형욱, 이종원, 정회경 배재대학교 공학연구소 2016 공학논문집 Vol.18 No.1

Recently for the safe and efficient management of reagents, Smart Reagent Cabinet Research is underway. The developed Smart Reagent Cabinet system manage’s the reagent information, like the reagent input, shipment record, information of the reagent in the cabinet, reagent cabinet information among other informations. However, there are not enough systems to manage and classifying the reagents and the properties of each reagent. In this paper, we design a reagent management system, applying 'Database Modeling' which classifies the existing reagents in Smart Reagent Cabinet System according to the properties and characteristics of the reagents. Therefore, it is considered that safe reagent management system will help manage the characteristics of each reagent separately. 최근 시약들을 안전하고 효율적으로 관리하기 위한 스마트 시약장 연구가 진행 중에 있다. 개발된 스마트 시약장은 시약 정보, 시약 입·출고 기록, 시약장 정보 등으로 나누어 시약들의 정보를 관리하고 있다. 하지만 시약들의 성상을 고려하여 관리하는 부분은 미비한 실정이다. 본 논문에서는 기존 스마트 시약장 시스템에 시약들이 가지는 성상과 특성에 맞춰 분류하는 데이터베이스 모델링(Database Modeling)을 적용한 시약 관리 시스템을 설계한다. 이에 따라 시약들이 가지는 각각의 특성에 맞는 관리 방법을 통해 안전한 시약 관리가 이루어질 것으로 사료된다.