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차은지 ( Cha Eun-ji ),한정엽 ( Han Jeong-yeob ) 한국공간디자인학회 2016 한국공간디자인학회논문집 Vol.11 No.5
(연구배경 및 목적)최급변하는 기술의 발달과 함께 장비의 수준도 점차적으로 높아지며 가상현실이라는 기술이 일부에서만 사용되던 예전과 달리 일반인도 쉽게 접할 수 있을 정도로 보편화되고 다양성이 증가하였다. 이러한 기술의 발달은 Experience자의 오감을 자극하여 보다 실제공간과 가상공간의 차이를 느끼지 못하고 가상공간 내에서 원활한 상호작용을 할 수 있도록 도움을 는데, 이러한 발전은 아직 초기단계이며 현재 시각과 청각을 활용한 콘텐츠는 많이 등장하였지만 오감을 활용한 콘텐츠는 대중적으로 활성화 되지 않고 있는 실정이다. 본 논문에서는 이러한 오감에 관련한 가상현실 콘텐츠 연구를 통하여 오감 가상현실 콘텐츠의 대중화를 위한 방향성을 제시하는데 목적을 두고 있다. (연구방법)가상현실에서 Experience자의 감각기관이 가상의 공간속에서 상호작용을 할 때 보다 높은 몰입감을 낼 수 있는데 Experience자가 가상현실 속에서 현실감을 느끼도록 하기 위해선 세 가지의 요소가 나타나야 하는데 바로 대화성Interaction, 현장성Presence, 자율성Autonomy 이다. 이러한 요소는 인간의 오감 즉 다섯 가지 감각이 자극 될 때 구현될 수 있으며 이러한 반응은 가상현실 속의 상호작용에서 일어나는 반응을 통해 Experience자가 이전의 인지하고 있던 예전의 정보를 연상해내고 그렇게 떠오른 연상은 콘텐츠를 분석하는데 있어 중요한 역할을 한다. 본 논문에서는 국내, 외에서 개발된 가상현실 콘텐츠 중(HMD기반) 오감에 관련된 콘텐츠를 대상으로 사례분석을 하고 가상현실 콘텐츠와 오감의 연계성, 중요성을 알아볼 것이다. (결과)본 논문은 국내, 외에서 개발된 가상현실 콘텐츠 중 오감에 관련된 콘텐츠를 대상으로 유형연구를 하고, 오감형 가상현실 콘텐츠의 방향성을 다음과 같이 제시하였다. 유형연구의 결과 시각, 청각, 촉각의 감각이 주로 사용되었으며 특히 시각은 모든 콘텐츠에서 볼 수 있었다. 청각의 경우 청각중심 콘텐츠로 조사를 한 결과 형상화되지 않은 이미지의 등장이 주를 이루었으며 소리에 집중할 수 있는 모노톤의 색상이 많이 등장하였다. 촉각을 통해 깊이감, 공간감 등을 느낄 수 있었으며 촉각을 통해 실재감이 증가하였다. (결론)4K, 8K고화질 디스플레이가 등장하였음에도 불구하고 HMD의 본질적인 단점인 Experience자의 멀미증상은 아직도 해결되지 않은 상태이며 300-500g대의 무거운 장비는 Experience자가 오래 사용하기 어려운 환경이다. Experience자가 현실의 세계처럼 느껴지 위한 오감의 경계 또한 현재보다 더 실존감있게 느껴져야 한다. 더욱 더 커져가는 가상현실시장의 더욱 확대되고 높은 가상증강현실기술이 만나 기존의 패러다임을 넘어선 새로운 오감형 콘텐츠가 나타날 것이라 생각된다. (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.
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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.
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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.
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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.
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중환자실 간호대상자의 설사발생 및 관련요인에 관한 연구
정효지,권시내,김진숙,차은지,강윤희 병원간호사회 2012 임상간호연구 Vol.18 No.1
Purpose: The purpose of this study was to investigate incidence and factors related to diarrhea in an intensive care unit (ICU). Methods: Retrospective correlational design was used. Data were collected from reviewing medical records of 210 patients stayed at an ICU in one university hospital, Seoul. Patients were included in the study if they 1) had no gastrointestinal disorders or fecal incontinence before coming to the ICU, 2) stayed longer than 5 days at the ICU, 3) were not on stool softners, 4) were without abdominal surgery, and 5) were 20-year-old or older. Results: The incidence of diarrhea was 27.1%. Durations of ICU stay, antibiotics administration, and enteral feeding were found to be statistically significant factors correlated with diarrhea. The enteral feeding was the significant predictors of the diarrhea in ICU. Conclusion: Since characteristics of diarrhea in ICU patients is shown to be multifactorial, nursing strategies for evaluating and managing related factors are recommended.
KCI
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