• 한국자기학회:학술대회 개요집
• /
• 한국자기학회 1999년도 추계연구발표회 논문개요집
• /
• pp.84-85
• /
• 1999

• 대한방사선기술학회지:방사선기술과학
• /
• 제11권1호
• /
• pp.17-23
• /
• 1988

As the reutilizing method of exhausted screen, authors used it as a filter and compared with the aluminium filtration. The results are as followed; 1. One sheet of gadolinium front screen has the same radiation absorption as $2.8{\sim}3.3\;mm$ Al equivalent and regular tungsten screen $2.3{\sim}2.7mm$ Al. 2. HVL after Gd-screen filtration was less than the values after aluminium and tungsten-screen filtration. And, image definition with Gd-screen filtration was better than other two cases. Ana surface dose to produce a same film density was more than other two cases. It will be very useful to apply, Gd-screen filter in clinics as it has no deficiency of image quality.

• 반도체디스플레이기술학회지
• /
• 제11권4호
• /
• pp.43-48
• /
• 2012

The screen printing method is much used in the flat panel display field including the LCD, PDP, FED, organic EL, and etc. for forming the high precision micro-pattern. Also A number of studies of screen printing method has been conducted as the method for the cost down through the improvement of productivity. Because of being the dot printing method of the cylindrical shape not being the line printing method like the existing PDP barrier rib and phosphor, the pillar arrays using the screen printing method is deposited in the hemispherical type not being cylindrical shape in the existing printing process conditions. In this paper, the parameters were set on the screen printing device in order to deposit the cross-sectional shape with the cone or trapezoid shape of the pillar in depositing the pillars used the screen printing device for vacuum glazing. The cross-sectional shape slope of the pillar according to the parameters was measured. And analysis the effect of the screen printing process conditions on the cross-sectional shape slope of pillars based upon the result of being measured. The processing conditions were drawn to minimize the cross-sectional shape slope of pillar.

• 한국컴퓨터정보학회:학술대회논문집
• /
• 한국컴퓨터정보학회 2020년도 제62차 하계학술대회논문집 28권2호
• /
• pp.519-520
• /
• 2020

본 논문은 실시간 3D 그래픽을 사용하는 Unity 3D나 Unreal Engine 등에서 이펙트를 표현하는 일반적인 방법인 Billboard의 문제점을 보여주고, 범용적이고 가벼운 연산으로 해결할 수 있는 방법을 제시한다.

• 한국해양공학회:학술대회논문집
• /
• 한국해양공학회 2004년도 학술대회지
• /
• pp.257-262
• /
• 2004

A series of preliminary model tests are performed to find out the wave attenuating effect of the pneumatic breakwater of environment friendly type, which is a bubble screen generated by releasing compressed air from a submerged multiple parallel manifold Rising bubbles induce vertical current, which produces horizontal currents flowing away from the bubble-screen area in both directions. Near bottom, the corresponding currents flow toward the bubble screen, thus completing the circulation pattern. The surface current moving against the direction of wave propagation causes some attenuation of the waves. It becomes more effective as the relative depth (d/ L) increases (short-period waves in deep water). With the same air-discharge, the multiple parallel manifold can be more effective for the attenuation of longer waves through optimum arrangement of manifold number. installation depth, manifold gap, etc. The pneumatic breakwater will give a wide utilization as a device for protecting harbor facilities and as a simple, mobile breakwater.

• 디지털융복합연구
• /
• 제12권1호
• /
• pp.525-530
• /
• 2014

본 연구는 스마트 미디어를 통해 TV영상물을 시청할 때, 스마트 미디어의 화면 크기가 수용자들의 영상물 평가와 프레즌스에 어떤 영향을 미치는지 살펴본 실험 연구이다. 본 연구를 위하여 대학생 피험자들에게 TV 자연다큐멘터리를 화면의 크기가 다른 스마트 미디어를 통해 시청하게 하고, 설문조사를 통해 프로그램에 대한 평가와 프레즌를 조사, 분석하였다. 설문조사의 결과를 분석한 결과, 화면이 큰 스마트 미디어를 통해 영상물을 시청한 피험자들이 화면이 작은 스마트 미디어를 통해 시청한 피험자들보다 프로그램의 영상미에 관해 더 훌륭하다는 평가를 하였으며, 프레즌스를 더 크게 느낀 것으로 나타났다. 그러나 화면의 크기가 프로그램의 작품성에 미치는 영향은 발견되지 않았다. 본 연구를 통해 스마트 미디어를 통한 TV영상물 시청에 있어서, 화면의 크기가 수용자들의 프로그램의 영상미에 관한 평가와 프레즌스에 영향을 미치는 중요한 요인이라는 사실을 알 수 있었다.

• 화훼연구
• /
• 제19권1호
• /
• pp.1-7
• /
• 2011

본 연구는 나리 하계 고온기 고품질 절화생산 및 경영비 절감을 위한 도입 소구의 비대증식에 유리한 환경조건을 찾아내기 위해 수행하였다. 종구비 절감을 위해 소구를 도입하여 양구하는데 효과적인 환경조건을 찾아내고자 재배형태를 비가림, 망실, 무피복으로 나누고 다시 절화 재배시 많이 사용하는 30% 차광처리와 무처리로 구분하여 시험하였다. 모든 처리구에서 비가림 재배가 우수하였고 차광의 효과도 다소 있었다. 특히 양구에 있어서는 대관령 등의 고랭지에서 주간과 야간온도의 차이가 커서 동화산물의 전류 및 축적이 많아 평지에 비해 구비대가 유리하여 시비 및 관수방법에 따라 보통 3년 정도인 양구 기간을 단축할 수도 있을 것으로 기대된다.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
• /
• 제34권3호
• /
• pp.175-180
• /
• 2023

Objectives: The coronavirus disease 2019 (COVID-19) pandemic has led to a decrease in face-to-face classes worldwide, affecting the mental health of children and their parents. The global pandemic has increased children's overall use of electronic media. This study analyzed the effect of children's screen time on problematic behaviors during the COVID-19 pandemic. Methods: A total of 186 parents from Suwon, South Korea, were recruited to participate in an online survey. The mean age of the children was 10.14 years old, and 44.1% were females. The questionnaire included questions on children's screen time, problematic behaviors, and parental stress. Children's behavioral problems were evaluated using the Behavior Problem Index, whereas the Parental Stress Scale was used to estimate parental stress. Results: The mean smartphone usage frequency of the children was 5.35 days per week, and the mean smartphone screen time was 3.52 hours per day. Smartphone screen time (Z=4.49, p<0.001) and usage frequency (Z=2.75, p=0.006) were significantly correlated with children's behavioral problem scores. The indirect effect of parental stress on this relationship was also statistically significant (p=0.049, p=0.045, respectively). Conclusion: This study suggests that children's smartphone screen time has affected problematic behaviors during the COVID-19 pandemic. Furthermore, parental stress is related to the relationship between children's screen time and problematic behaviors.

• 한국소음진동공학회:학술대회논문집
• /
• 한국소음진동공학회 2005년도 춘계학술대회논문집
• /
• pp.865-868
• /
• 2005

A Helmholtz resonator is one of noise control elements widely used in many practical applications. The resonator has very high absorption at resonance frequency but the frequency bandwidth is very small. Therefore many kinds of additional resistive screens have been applied to the resonator's neck in order to increase the bandwidth. This paper discusses the absorptive characteristics of a Helmholtz resonator damped by a flexible porous screen in form of wire mesh. First, various experimental results are introduced and studied. Secondly, the effect of the resistive screen is theoretically predicted. It is shown that the distance between the screen and aperture affects on the resonance frequency as well as the absorption of the system.

• 한국의류학회지
• /
• 제26권2호
• /
• pp.315-324
• /
• 2002

The purpose of this study was to fed out the effects of sensibility elements and screen composition elements on purchase intention on the internet fashion shopping mall. A total of 200 responses were collected from a Questionnaire survey. The sensibility words were used for sensibility elements analysis. Screen composition elements were divided into 5 factors by factor analysis; product property, convenience of shopping, service, design, and promotion. The study showed that the satisfaction of sensibility elements and screen composition elements led to a positive purchase intention.