• Proceedings of the KIPE Conference
• /
• 2012.07a
• /
• pp.600-603
• /
• 2012

본 논문은 최근 친환경 차량인 EV & HEV의 전장품에 운전 효율 및 연비를 극대화하기 위해 브러시리스 직류 (Brushless DC) 전동기 및 Sensorless Drive를 적용시키는 사례가 증가하고 있다. 특히 전 세계적으로 환경오염의 주범이 되고 있는 차량의 이산화 탄소 배출량 규제, 계속된 유가상승 등에 따라 가장 밀접하게 연관되어 있는 자동차 전장품에 전동화를 통한 연비향상을 적극적으로 추진하고 있다. 본 논문에서는 차량의 전장 제품으로 다양하게 적용되고 있는 에어컨 압축기로 냉방용 컴프레서에 브러시리스 직류전동기 및 Sensorless 제어기를 적용 에어컨 컴프레서를 개발 하여 20CC 전동식 스크롤 컴프레서에 적용하여 실험하였다. 이러한 실험으로 제품의 운전 효율 증대시킴은 물론 우월한 압축 성능을 가져 옴으로써 차량용 에어컨 컴프레서의 고효율 전동화를 유도 시킬 수 있음을 확인 할 수 있었다.

• Journal of Conservation Science
• /
• v.35 no.1
• /
• pp.11-18
• /
• 2019

The adhesives joining Buddhist scripture scrolls from medieval Korea(Goryeo Dynasty, A.D. 918~1392) are different from wheat starch adhesive. The composition of the adhesive was analyzed using Attenuated Total Reflectance-Fourier Transform Infrared(ATR-FTIR) spectroscopy. In the adhesive used to join Buddhist scripture scrolls, peaks attributed to amide I and amide II of the protein and carbohydrate were detected in the ATR-FTIR spectra, and no carbonyl peak($1745cm^{-1}$) for oil was detected in the 2nd derivative ATR-FTIR spectra. The ATR-FTIR spectra almost coincided with those of defatted soybean powder adhesive. Hence, the adhesives joining Buddhist scripture scrolls were inferred to be soybean adhesive prepared from a defatted soybean cake.

• International journal of advanced smart convergence
• /
• v.11 no.2
• /
• pp.77-82
• /
• 2022

The third-person side view game perspective of side-scrolling games makes playing such games a completely different gaming experience from other traditional games. Nowadays, many game elements are combined with each other, and horror and puzzle elements are often combined to appear in side-scrolling games, bringing players a unique gaming experience. In such games, players seem to be watching their own manipulation of characters. The performance is the same as a stage play, so how to let players better experience such a horror and puzzle-solving stage play through the design of the characters is a key point. However, it is often difficult to accurately classify only from game elements, so first of all, the author will explain the game division of the side scrolling horror puzzle game. After that, this article will analyze the character designs in the three works with high sales and good reputation on Steam, and then draw conclusions.

• Proceedings of the Korean Society of Broadcast Engineers Conference
• /
• fall
• /
• pp.235-237
• /
• 2021

코로나 19로 대학교 강의들이 비대면 방식으로 전환되고 있는데, 기존의 교수학습 지원센터는 웹 환경만을 제공한다. 따라서 본 논문에서는 모바일 애플리케이션을 통해 수강생들이 교수학습 지원센터에 쉽게 접근할 수 있도록 도와주는 시스템을 개발하였다. 애플리케이션에서 학생들의 강의 시간 및 시험, 과제 등의 일정을 관리해주고, 푸시 알림을 제공해주는 학습 도우미의 역할을 수행한다. 뿐만 아니라 직관적인 인터페이스, 다크 모드, scroll-to-top 버튼 등을 고려한 디자인으로 사용자의 편리함을 도모한다. 학습 도우미 애플리케이션의 가장 핵심기능 중 하나는 머신러닝 기법 중 비선형 회귀(Non-Linear Regression)을 이용해 성적 데이터를 분석해주는 차별화된 기능이다. 이를 위해 최종적인 성적을 종속변수, 일정 기간까지의 성적을 독립변수로 설정하여 기존의 성적 데이터를 바탕으로 종속변수인 최종성적을 랜덤 포레스트 비선형 회귀분석으로 예측하는 알고리즘을 제시하고자 한다.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2020.06a
• /
• pp.56-56
• /
• 2020

하도식생은 흐름과 유사의 이송에 영향을 주고, 하도의 지형변화를 일으키는데 중요한 역할을 하다. 하도 식생의 밀도가 증가하면, 하안의 안정성이 증가하고 하안침식이 감소하며, 사주의 형상과 거동에 영향을 준다. 또한 하천의 사행발달 및 하천의 지형변화에 영향을 준다. 식생의 성장과 밀도는 홍수 및 하상변동에 의하여 영향을 받으며, 이는 흐름 및 하천의 지형에 영향을 준다. 따라서 본 연구에서는 하도식생에 의한 사행하천의 발달과정을 2차원 수치모형을 적용하여 분석하였다. 하도식생의 생의 성장과 소멸과정을 고려하여 식생밀도를 고려하여 사행하천의 변화 과정을 분석하였다. 초기에 하안침식이 발생하고, 하폭이 증가하였다. 특히, 흐름이 집중되는 만곡부에서 하안침식이 증가하며, 하도의 사행도가 증가하였다(Fig.1(b)). 시간이 증가하면서 만곡부 내측에서 고정사주 내측에서 scroll bar가 발달하며, 만곡부 외측에서는 하안침식이 발생하고, 사행도가 증가하였다. 또한 식생의 침수시간이 감소하고 식생의 성장률은 증가하였다(Fig.1(c)). 식생의 밀도가 증가함에 따라 사행도는 증가하였다. 식생의 밀도가 증가함에 따라,

• Conservation Science in Museum
• /
• v.2
• /
• pp.41-49
• /
• 2000

The most important aspect in preserving ancient paintings is to return the painting to the original state and conserve it in the original state. One traditional recovering method is the use of frame, for which scientific analysis such as X-rays, infrared and microscope are used and materials are carefully selected. Arhat, a Buddhist painting of Koryo Dynasty, one of the Korean National Museum collections has lost its original shape. With conservation treatment, the cause was found, that is to change frame scroll method to mounting method. In the main body, pre-analysis and conservation method of Arhat will be introduced.

• Journal of the Ergonomics Society of Korea
• /
• v.31 no.2
• /
• pp.309-317
• /
• 2012

Objective: The aim of this paper is to inquire into the influences form factors and control types affect a search time and comfort at list menu of full touch phone. Background: Various studies have been proceeded that are related to the optimum touch area for enhancing usability of control and legibility in mobile touch device. In the environment of list menu which is widely used to provide various information effectively, however, not only comprehensive consideration for legibility and control is to be seek but also research for control type which is to scroll a list. Method: This study executed form factor experiment to inquire into the influence that font size, height of row and fixed area affect searching time and comfort in the while information processing even if the information on the list is unsorted in alphabetical order. Among the result of form factor experiment, control type experiment was executed by selecting shortest performance time, highest legibility comfort and control comfort. Control type experiment was implemented to figure out the influence which existing flicking type, scrolling bar type, newly established button page type and button raw types affect performance time and subjective comfort depending on location of the information. Results: Font size 12pt, height of row 7mm and fixed area 15mm was shortest performance time and got highest comfort and legibility score in form factor experiment. A Button page which was newly proposed type was shortest performance time and got highest comprehensive comfort in control type experiment. Conclusion: Form factor experiment showed similar results with the study through reading a long passage of character or controlling a grid icon type. However, height of row turned out to affect not only touch area for control but also legibility by ruling space between the lines. Button page type which was newly proposed showed shortest performance time and got highest comprehensive comfort. Because Button page type needs few finger movements than other control types and implements search in the fixed form, unlikely other type which list keeps moving. Application: This study should be applied in deciding form factors and control type for scroll when designing a list menu of full touch phone.

• Journal of the Institute of Electronics and Information Engineers
• /
• v.53 no.8
• /
• pp.85-92
• /
• 2016

Mobile cloud computing (MCC) is not just extensions of cloud concepts into mobile environments, but the service technologies that all mobile devices including smartphone can use the desired services by using cloud technology without the constraints of time and space. Currently, a lot of works on mobile cloud computing have been actively researching, whereas user interfaces are not so much researched. The main features and contributions of this paper are as follows. First, develop UI considering UX that is different from conventional interfaces supported by SPICE. Second, combine two button interface into one button interface when keyboard is used in mobile cloud computing clients. Third, develop a mouse interface suitable for mobile cloud computing clients. Fourth, in mobile cloud computing client, solve a problem that the selection of button/files/folder has at the corner. Finally, in mobile cloud computing clients we change mouse scroll mapping functions from volume button to scroll interface in touch-screen. The results of performance evaluation shows that users can input easily with the increased and fixed mouse interface. Since shortcut keys instead of the complex button keys of keyboard are provided, the input with 3-6 steps is reduced into 1 step, which can simply support complex keys and mouse input for users.

• Conservation Science in Museum
• /
• v.17
• /
• pp.69-84
• /
• 2016

Yuso is the term for decorative tassels of a braided string which hangs a scroll painting. This study, drawing on extant research concerning the yuso made for Joseon period portrait scrolls of kings and meritorious retainers, focuses on the yuso created to hang literati portraits. Concretely, It examines yuso of seven portraits in the collection of the National Museum of Korea in order to characterize their appearance and determine their material composition. The study found that most of the yuso are sixteen-strand strings braided into a rounded cross-section(dongdahoe). The seven yuso, of which six are red and one indigo-blue, reflect the popular style associated with Joseon period literati portraits. The yuso for the portrait of Yun Geup(duksu 3503) is made from gilded paper. Analysis showed Fe particles present in a red pigment underlying the gold layer, suggesting the presence of red ochre(seokganju), an iron oxide mineral. The yuso of the portrait of Shin Im(duksu 4846) is used a paper which contains gold as well as traces of Pb, Hg and Ag. The paper in the yuso for the portrait of Yi Seongwon(bongwan 10122) mainly consisted of Ag, indicating silver paper having been used in its fabrication. The inner paper in the yuso of the portrait of Yi Seogu(sinsu 1065) is a leather combined with Ag, Fe, and Br, according to chemical analysis. The FTIR of the leather sample reveals that the spectrum in the fingerprint region is nearly identical to that of sheepskin, indicating the yuso was made from gold-coated sheepskin.

• Journal of Energy Engineering
• /
• v.24 no.4
• /
• pp.124-129
• /
• 2015

An experimental study was performed estimating COP(Coefficient of Performance) of air-conditioning cycle using inverter scroll compressor with and without $Al_2O_3$ nano particle. All experiments were done for various compressor speeds from 1000~4000 rpm and used the inverter controller called CANDY to change the compressor rpm. The air-conditioning cycle components in the apparatus were used as same with components of YF hybrid car. To estimate the COP, this study measured the temperature and pressure at inlets and outlets of compressor, condenser, and evaporator. And also measured the compressor input power using Powermeter. Through the experiments, the maximum error to estimate COP was shown about ${\pm}6.09%$ at 3500rpm. The COP of refrigeration cycle with $Al_2O_3$ nano-particle was similar with that of the base cycle without nano-particle between 1000~3000 rpm of the compressor speed. But, This study showed that the COP of the cycle with $Al_2O_3$ over 3000 rpm of the compressor speed was higher than that of the base cycle due to the higher heat transfer rate increased in the evaporator from the higher oil flow rate inside the cycle as well known. Those results can be used the basic and fundamental data to design the air-conditioning cycle using inverter scroll compressor with $Al_2O_3$ nano particle.