• Smart Structures and Systems
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• 제7권3호
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• pp.185-198
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• 2011

The promise of biomimetic smart structures that can function as sensors and actuators in biomedicine is enormous. Technological development in the field of stimuli-responsive shape memory polymers have opened up a new avenue of applications for polymer-based synthetic actuators. Such synthetic actuators mimic various attributes of living organisms including responsiveness to stimuli, shape memory, selectivity, motility, and organization. This article briefly reviews various stimuli-responsive shape memory polymers and their application as bioactuators. Although the technological advancements have prototyped the potential applications of these smart materials, their widespread commercialization depends on many factors such as sensitivity, versatility, moldability, robustness, and cost.

• Macromolecular Research
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• 제16권8호
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• pp.670-675
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• 2008

A series of pH and temperature-responsive (N,N-diethylacrylamide-co-methylacrylic acid) copolymers were synthesized by radical copolymerization and characterized by elemental analysis, Fourier-transform infrared (FT-IR), nuclear magnetic resonance (NMR) $^1H$, $^{13}C$ and LLS. The effects of salt and pH on the phase transition behaviors of the copolymers were investigated by uv. With increasing NaCl concentration, significant salt effects on their phase transition behaviors were observed. UV spectroscopic studies showed that the phase transition became faster with increasing NaCl concentration. In addition, the phase transition behaviors of copolymers were sensitive to pH. The pH and temperature sensitivity of these copolymers would make an interesting drug delivery system.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2017년도 제56차 하계학술대회논문집 25권2호
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• pp.149-150
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• 2017

웹 프로그래밍을 공부하는 학생들이 본인들이 만든 웹 페이지를 서버에 호스팅하여 관리하기는 쉽지 않다. 본 논문에서는 스프링 프레임워크를 기반으로 반응형 웹을 개발하고 개발한 웹 페이지를 아마존 웹 호스팅 서비스를 이용하여 호스팅하는 과정을 다룬다. 스프링 프레임워크는 POJO(Plain Old Java Object) 방식의 프레임워크로써 특정한 인터페이스를 구현하거나 상속을 받을 필요가 없어 기존에 존재하는 라이브러리 등을 지원하기에 용이하고 객체가 가벼우며, CSS를 사용한 반응형 웹은 모바일에서도 접근하기 쉬우므로 높은 접근성을 제공한다. 이렇게 개발한 웹 페이지를 호스팅 하여 관리하는 것은 특히 입문단계의 개발자에게 큰 도움이 될 것이다.

• Journal of Applied Biological Chemistry
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• 제43권4호
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• pp.192-196
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• 2000

The molecular basis of plant adaptation to the environment is one of the most complex areas of plant science and an understanding of this subject is critical to our ability to feed an increasing word population. Research on plant adaptation to the environment often involves two complementary approaches; top-down studies of well-adapted plants with the goal of identifying and describing the biochemical basis of adaptation and bottom-up targeted analysis of specific biochemical mechanisms with the goal of understanding how these mechanisms contribute to overall plant performance. This brief review will provide examples of both of these approaches by describing the study of sorghum's adaptation to dry environments and the role of a blue light responsive chloroplast promoter that helps protect plants against damage by high irradiance.

• Journal of Microbiology and Biotechnology
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• 제18권11호
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• pp.1755-1761
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• 2008

The present study revealed that Lrp, a leucine-responsive regulatory protein, is involved in the regulation of cadBA transcription through activation of $P_{cadBA}$. The influence of Lrp on $P_{cadBA}$ was mediated by CadC, and thereby, CadC was able to compensate for the lack of Lrp in the activation of $P_{cadBA}$. Western blot analyses and EMSA demonstrated that the cellular level of CadC was not significantly affected by Lrp, and that Lrp exerted its effect by directly binding to $P_{cadBA}$. These combined results suggested that CadC and Lrp function cooperatively to activate the $P_{cadBA}$ rather than sequentially in a regulatory cascade.

• Journal of Microbiology and Biotechnology
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• 제23권7호
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• pp.923-931
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• 2013

Rapamycin, known as an inhibitor of Target of Rapamycin (TOR), is an immunosuppressant drug used to prevent rejection in organ transplantation. Despite the close association of the TOR signaling cascade with various scopes of metabolism, it has not yet been thoroughly investigated at the metabolome level. In our current study, we applied mass spectrometric analysis for profiling primary metabolism in order to capture the responsive dynamics of the Chlamydomonas metabolome to the inhibition of TOR by rapamycin. Accordingly, we identified the impact of the rapamycin treatment at the level of metabolomic phenotypes that were clearly distinguished by multivariate statistical analysis. Pathway analysis pinpointed that inactivation of the TCA cycle was accompanied by the inhibition of cellular growth. Relative to the constant suppression of the TCA cycle, most amino acids were significantly increased in a time-dependent manner by longer exposure to rapamycin treatment, after an initial down-regulation at the early stage of exposure. Finally, we explored the isolation of the responsive metabolic factors into the rapamycin treatment and the culture duration, respectively.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2014년도 제50차 하계학술대회논문집 22권2호
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• pp.43-44
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• 2014

본 논문에서는 사용자에게 동일한 경험과 최적화 된 웹 매거진의 디자인 서비스 설계 연구를 위해 해상도 혹은 디바이스에 따라 유연하게 변화되는 반응형웹 매거진의 표현방식에 따른 변화를 살펴보았다. 웹 매거진의 표현방식은 멀티미디어, 인터랙티브 환경, GUI 디자인으로 구성 되어 있다. 이를 토대로 점유율이 높은 대표 웹 매거진을 선정하여 표현 방식을 살펴본 결과 멀티미디어 요소에서는 동일한 디자인에 최적화 된 크기 변화를 주는 방법과, 협소한 해상도에서는 비교적 중요도가 떨어지는 디자인 요소를 숨기는 방식으로 설계 되었고, 인터랙티브 환경과 GUI의 변화에서는 요소들의 정렬의 변화로 동일한 시각적 이미지와 최적화된 이미지 배열의 형태를 보여주었다.

• 반도체디스플레이기술학회지
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• 제13권1호
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• pp.67-72
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• 2014

Recently released digital devices have various characteristics such as different screen sizes or different sensors embedded, according to the purpose of their use. So the device types are fragmented and the software should be independently developed for each devices with different characteristics. RRUI are being developed and standardized in progress to provide UI using user information and context information, as one way of solving the device fragmentation. In this paper, we take a look at various standards that classify and utilize user information and context information for RRUI and try to find correlations between MPEG-UD and RRUI.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2005년도 학술대회 논문집
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• pp.167-172
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• 2005

This study based on the experimental data on the daylight responsive dimming systems performance. The purpose of this study increases the energy-saving effects by reducing excessive intensity of radiation of artificial lighting through analyzing incident daylight. The photosensor sends amounts of detected luminous flux to digital control unit(DCU) as a signal and then, it can decide dimming ratios, by received a proper dimming signal from DCU. Generally it is effective to control artificial lighting with the different control ratio of each row by setting a photosensor as same numbers and rows as artificial lighting. However, it is ineffective to do in initial costs of systems aspect in offices. By analyzing the data of this performance and finding regular ration between photosensors. we will execute different dimming ratios to each row of artificial lighting by a single photosensor.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.633-635
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• 2007

To cope with increasing power demand in metropolitan area, the power system in Korea has equipped with unit generator of large capacity, high density and uneven distribution, and transmission line of long distance, large capacity and high voltage. As the power system growing up enormous, it has become difficult to maintain the standard voltage in case of radical fluctuation of load or severe change of voltage by power system fault for its weakness of responsive characteristics although the power condenser has been installed to solve the unstability by lack of reactive power. Consequently, we review harmonic wave production and control characteristics to solve unstability problem of voltage in northern metropolitan, to reduce transmission restriction cost and to minimize load shedding by relocation of SVC (Static Var Compensator), which is highly effective for improvement of responsive characteristics for radical voltage fluctuation.