• 한국의류학회지
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• 제25권5호
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• pp.856-867
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• 2001

The purpose of this study was to develop washable panties for elderly women of incontinence urine. We carried out a questionnaire survey in order to find out what are the inconvenience of incontinence. Also we analyse the properties of incontinence panties available in silver market. Then we did wearing test of the existing continence panties to 40 subjects. Having done the wearing test, it was clear that the composit and the size of the absorbing layers must be crucial points of the development of the prototype panty. The prototype was designed to improve absorbing speed as well as capability without sacrificing of wearing comfort. The developed prototype panty went through wearing test and property tests to assure the design. The results are as follows:- 1. Absorbing capability as a whole, quick absorbance at the moment of passing of urine, the touch of the cover layer after quick absorbance and deodorant property were improved than existing incontinence panties. 2. The size and the dimensions of each part, specially absorbing layers at the crotch area, were remarkably improved.

• 디지털산업정보학회논문지
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• 제12권1호
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• pp.97-106
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• 2016

3D virual reality technique develop rapidly such as parts of education, health, national defense, etc. This paper implements an education contents utilizing 3D virtual reality based on HMD. In this paper, contents make up Changdeokgung Palace using to 3Dmax and Unity program, it shows on implemented Helmet Mounted Display. HMD obtain dynamic image from the target source of smart phone. Also, contents consist of service senerio through divided palace position and King's a day's journey especially. Above all, this paper indicate improving performance according to reduced cybersickness and immersion enlargement. And memory capacity reduced by various technique such that file type, compressed file, minimized resource. Proposed technique can obtain dynamic 3D image by HMD implementation at real time basis so that it is possible to use simultaneously multi-source. From the various and practical experiment, it is confirm that proposed 3D VR education system is useful for experience of virtual reality practically.

• 한국대기환경학회지
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• 제11권1호
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• pp.15-28
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• 1995

Over the last two decades, air quality models have been developed and used in the United States. Many of these models ate distributed as parts of UNAMAP. These models have been used as useful tools for urban air quality management in Korea. However, when we use these models, many problems could be occured because of their different topographical and meteorological conditions. In the present study it is described that the characteristics about developement of the local scale diffusion models for application to Korea. Also for evaluation purpose of the models, input data requirements such as air pollutant concentrations, emission inventory, meteorological data, and field experiment data, were discussed.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1998년도 추계학술대회
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• pp.213-214
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• 1998

The important role of the ultrasonic Doppler system in the modem clinical medicine is to provide the clinical information of the vascular system. The ultrasonic pulsed wave(PW) Doppler system, a kind of the ultrasound Doppler system, is more available than the ultrasonic continuous wave(CW) Doppler system because it can evaluate the velocity and the direction of blood flow as well as the depth of vessel. However, the ultrasonic PW Doppler system has the disadvantage that the range of evaluating velocity of blood flow is limited(Nyquist limit). In order to solve this limit, we propose the algorithm for eliminating this aliasing in this paper. In addition, we propose the efficient signal processing algorithm.

• 한국산업융합학회 논문집
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• 제16권2호
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• pp.35-39
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• 2013

This paper synthesized the new copper removal agent(PW-2001) and investigated removal efficiency of copper, COD, calcium, SS and sludge amounts. Removal efficiency of copper were 96.1% and 99.1% with the lime and PW-2001, respectively while COD removals reached up to 38% and 69.6% with the use of lime and PW-2001. The concentrations of calcium and SS with PW-2001 were decreased 2.68 and 4.95 times lower than those with lime. Amount of sludge with PW-2001 was 60% smaller than lime. Quantity of PW-2001 needed for coagulation only reached 58.7, compared to lime standard quantity(100), and total cost of copper removal with PW-2001 was saved 25% more than lime.

• 한국산업정보학회논문지
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• 제3권1호
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• pp.67-77
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• 1998

Reliability growth testing used to evaluate reliability in the automobile industry have not always been able to correctly address reliability concerns with increased confidence. The demand to confirm to all product performance requirements under various operating environments has added to the complexity of accurately assessin theproduct's reliability in the required development time. In addition, it is often desired to determine the relationship of a product's reliability to cost, development time, design, manufacturability and assembly. This paper presents the methods for reliability growth modeling to evaluate and interpret reliability concerns to support the reliability analysis of automobile assemblies and systems. This reliability growth modeling process is a mechanism to help "build in" reliability during early phases in the vehicle devleopment stage.

• 한국측량학회지
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• 제9권2호
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• pp.115-118
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• 1991

토지 정보 시스템은 토지의 물리적, 법적 특성을 데이타 베이스화하는 것으로서 토지 기록 시스템이라 부르기도 한다. 수치원격탐사 자료는 스펙트럴 자료의 기본적인 통계를 계산하는데 유용하다. 각 밴드의 최대, 최소값, 평균, 표준편차, 분산-공분산 행렬, 그리고 밝기값의 빈도수를 막대도표로 그릴 수 있다. 본 논문에서는 항공사진을 스캔닝 하였으며, 다음 논문에 인공위성 영상을 스캔닝 할 것이다.

• 한국농공학회지
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• 제38권2호
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• pp.133-144
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• 1996

To get accurate results, the realistic stress-strain relationships of soils are dependent on a number of factors such as soil types, density, stress levels and stress path. Such attempts are continuously being made by the developement of analytical models for soils incorporating all such factors. Isotropic compression-expansion test and a series of drained conventional triaxial tests with several stress path for Baekma river sand were performed to investigate parameters characteristics of Lade's single work hardening model dependant on the stress path. Using the computer program based on the regression analysis, the values of parameters for the model were determined. In conclusion, the parameters of Lade's model are little influenced by the stress paths. Though yield criterion parameters ( h, ${\alpha}$a) are much influenced by stress level and stress path, the parameters don't have influence on stress-strain behavior.

• Journal of Life Science
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• 제9권1호
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• pp.17-21
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• 1999

Chitosan derivitives, a sulfated N-acetylchitosan was synthesized, and artificial skin of sulfated N-acetylchitosan and N-carboxyl butyl chitosan were investigated. Sulfated derivatives of chitosan were analyzed by {TEX}${13}^C${/TEX}-NMR and the structure on N-acetyl chitosan 3,6-O-disulfate were confirmed. Rabbits underwent a midline laparotomy followed either by a bilateral peritoneal sidewall abraison(3.0×1.5cm). The injured surface was then covered with 0.2mm thick sulfated N-acetyl chitosan membrane. Sulfated N-acetyl chitosan membrane was found to reduce postsurgical bleeding after abraison of peritoneal surface treated with sulfated N-acetyl chitosan membrane. Sulfated N-acetyl chitosan implanted rabbit showed quick wound healing than N-carboxybutyl chitosan. With a sterilization procedure of chemical sterilization, sulfated N-acetyl chitosan seem to be better substitutes than N-carboxybutyl chitosan.

• 한국산학기술학회:학술대회논문집
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• 한국산학기술학회 2010년도 춘계학술발표논문집 2부
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• pp.957-960
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• 2010

본 연구에서는 중금속 크롬($Cr^{+6}$)이 포함된 흑색안료(Copper Chromite Black)를 공침공정을 이용하여 무독성의 Fe 화합물로 대체한 환경친화적인 블랙(흑색)안료를 개발하였다. 안료제조를 위하여 인체에 무해한 화합물($MnCO_3$, Fe(OH)$_3$, CuO)을 원료로 사용하였으며, 가스소성, Ring-Mill에 의한 습식분쇄 그리고 건조과정을 통하여 흑색안료를 제조하였다. 안료의 평가는 제품의 품질을 결정하는 색상과 착색력을 최우선으로 선정하여 색차계로 고찰하였다. 연구결과, 공침공정으로 제조한 원료를 $950^{\circ}C$에서 12시간 동안 가스소성을 한 후 건조와 분쇄공정(습식)을 거쳐 흑색안료를 제조하였을 때, 최적의 색 선명도, 착색력 및 입도($1{\mu}m$ 이하)를 가진 것으로 나타났다.