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차은지 ( Cha Eun-ji ),한정엽 ( Han Jeong-yeob ) 한국공간디자인학회 2016 한국공간디자인학회논문집 Vol.11 No.5
(Background and Purpose)Virtual reality(VR) technology has become widespread and diversified to an extent that it is accessible by ordinary people, unlike in the past when its application found only some applications, amid recent advancement of technology and equipment. Such technological advancement has enabled users to be engaged in undisrupted interaction within virtual space without recognizing any difference between real space and virtual space while five senses are being stimulated. VR technology still remains at incipient stage, and contents that stimulate five senses have yet to be disseminated widely to the public despite the emergence of many contents experienced with visual and auditory senses. The purpose of this study was to present a direction for widespread dissemination of VR contents stimulating five senses of human based on investigation into VR contents related to such five senses. (Method)In virtual reality, immersiveness increased more significantly when sensory organs of users were involved in interaction within virtual space. Three elements, namely conversation-type interaction, presence, and autonomy, were crucial for users to have realistic experience in virtual reality. Those elements could be working when five senses of human were stimulated. Such reaction led users to retrieve information from their past through interaction occurring in virtual reality. Images, recollected in that way, were important in analyzing contents. The study analyzed concerned cases involving the contents associated with five senses among VR contents(HMD-based) developed in Korea or abroad and examined inter-connectivity between VR contents and five senses and furthermore looked into the importance of the five senses. (Results)This study investigated the types of contents related to five senses of human among VR contents developed nationwide and abroad and presented the direction of VR contents experienced with five senses as stated below. The results of analysis on content types showed that VR contents were experienced mostly with visual, auditory, and tactile senses. Particularly, all contents involved stimulation of visual sense. For auditory sense, most contents featured amorphous or shapeless images as found in a survey that focused on contents experienced with auditory sense. In addition, there was a preponderance of monotone colors that helped increase focus on the sound among contents stimulating auditory sense. Meanwhile, contents stimulating tactile sense allowed users to feel depth, space, etc. increasing realistic feeling. (Conclusions)The motion sickness in VR users, the fundamental weakness of HMD, has yet to be resolved despite emergence of 8K high image quality displays, and furthermore, heavy equipment with a weight of 300-500g hinders prolonged use. The boundaries of five senses need to create realistic feeling more than they do in real world to ensure that users feel as if they were in real world. New five-sense type contents are expected to emerge, moving beyond existing paradigm, as ever-growing VR market is further expanding and virtual augmented reality technology converges with VR technology.
연구논문 : 부산시 장산습지 토양의 물리적 및 화학적 특성
차은지 ( Eun Jee Cha ),함세영 ( Se Yeong Hamm ),김현지 ( Hyun Ji Kim ),이정환 ( Jeong Hwan Lee ),옥순일 ( Soon Il Ok ) 한국환경과학회 2010 한국환경과학회지 Vol.19 No.11
This study examined the physical and chemical properties of soil in Jang-San wetland in Busan Metropolitan City. The wetland covers wide and flat area comparing to its outside. The samples of the wetland soil were collected and analyzed in order to identify the profiles and chemical properties. According to the analyses of soil moisture and particle size distribution, the wetland soil mostly belongs to sandy loam with the soil moistures of 14.9-153.2%. The soil profiles are configured with O, A, B, and C horizons from the land surface. The organic matter content (2.38-16.7%) at most sampling locations decreases downwardly with the highest at 0-20 cm depth. The organic matter content has a good positive relationship with soil moisture content. According to X-ray diffraction analysis, the wetland soils contain quartz and feldspar (the main components of rhyolite porphyry) as well as montmorillonite, gibbsite, and kaolinite (the weathered products of feldspar). The wetland soil displays the highest iron concentration (average 22,052 mg/kg), indicating oxidation of iron. High concentrations of potassium (average 17,822 mg/kg) and sodium (average 5,394 mg/kg) originate from the weathering of feldspar. Among anions, sulfate concentration is highest with average 9.21 mg/kg that may originate from sulfate minerals and atmosphere.
기계적 합금화 공정에 의한 Hf계 비정질 분말의 미세변형거동 관찰
김송이,이아영,차은지,권도훈,홍성욱,이민우,김휘준,이민하,Kim, Song-Yi,Lee, A-Young,Cha, Eun-Ji,Kwon, Do-Hun,Hong, Sung-Uk,Lee, Min-Woo,Kim, Hwi-Jun,Lee, Min-Ha 한국분말야금학회 2018 한국분말재료학회지 (KPMI) Vol.25 No.3
In this study, we investigate the deformation behavior of $Hf_{44.5}Cu_{27}Ni_{13.5}Nb_5Al_{10}$ metallic glass powder under repeated compressive strain during mechanical milling. High-density (11.0 g/cc) Hf-based metallic glass powders are prepared using a gas atomization process. The relationship between the mechanical alloying time and microstructural change under phase transformation is evaluated for crystallization of the amorphous phase. Planetary mechanical milling is performed for 0, 40, or 90 h at 100 rpm. The amorphous structure of the Hf-based metallic glass powders during mechanical milling is analyzed using differential scanning calorimetry (DSC) and X-ray diffraction (XRD). Microstructural analysis of the Hf-based metallic glass powder deformed using mechanical milling reveals a layered structure with vein patterns at the fracture surface, which is observed in the fracture of bulk metallic glasses. We also study the crystallization behavior and the phase and microstructure transformations under isothermal heat treatment of the Hf-based metallic glass.
유엔 지속가능발전목표(SDGs) 지표 프레임워크 구축과 통계의 역할
박영실 ( Young Shil Park ),이영미 ( Youngmi Lee ),김석호 ( Seokho Kim ),차은지 ( Eun Ji Cha ) 한국조사연구학회 2017 조사연구 Vol.18 No.3
유엔은 2015년 9월 총회에서 인류공동의 발전을 위한 지속가능발전목표(SDGs)를 채택하였다. 이 목표는 17개 목표, 169개 세부목표, 200여 개 글로벌지표로 구성되며, 그 내용은 경제 사회 환경 분야를 포괄하고 있다. 유엔이 이전에 제시했던 새천년개발목표(MDGs)가 개발도상국의 발전에 초점을 두었던 반면, SDGs는 개발도상국과 선진국 모든 국가를 대상으로 하는 보편적 적용가능성을 그 특징으로 하고 있다. 그리고 이행과정에서 어느 누구도 소외시키지 않는다는 포용성의 원칙을 천명하고 있다. 또한 SDGs는 이행수단에 대한 구체적 지표를 설정해 두고 있다. 즉 SDGs는 목표의 단순한 나열에 그치지 않고 이행을 위한 실천기제로써 `통계`를 중요하게 다루고 있다. 이 논문에서는 SDGs를 소개하고, SDGs가 학계, 정부 및 업계의 통계 관련 이해종사자들(통계인)에게 던지는 의미를 고찰해 보고자 한다. The United Nations adopted the Sustainable Development Goals (SDGs) for the common development of mankind at the general assembly in September 2015. SDGs is composed of 17 goals, 169 targets, and 200 global indicators. Also, its contents include economic, social and environmental aspects. Whereas the Millennium Development Goals (MDGs) previously provided by the United Nations focused on the development of developing countries, SDGs are characterized by universal applicability to all developing and developed countries. Besides, the SDGs are based on the principle of inclusiveness that “no one is left behind” in the course of implementation. In addition, the SDGs have set specific indicators regarding means of implementation. In other words, SDGs treat `statistics` as a practical mechanism for implementation rather than a simple list of goals. The main purpose of this paper is to introduce what SDGs are and at the same time to examine what the SDGs mean to those who work in statistics in the field of academia, government and related industries.