Korea Advanced Institute of Science and Technology · Engineering
김영철 교수의 연구실은 재료 과학, 신경망 기반 컴퓨팅, 도시공간 분석 및 환경 지속가능성 분야에서 다학제적 연구를 수행하고 있습니다. 고분자 재료의 핵형성 거동과 비정질 고분자에서의 결정화 동역학을 중심으로 재료 설계에 기여하며, 동시에 스토하스틱 컴퓨팅 기반의 뉴럴 네트워크 아키텍처 개발로 초고밀도 통합 회로 기술을 탐색하고 있습니다. 또한 도시 공간의 사용 패턴, 녹색공간 접근성, 사회적 인식을 기반으로 한 도시 정책 지원을 위한 지도 기반 분석 기법을 개발하고 있습니다.
Figures are computed from collected data and may differ slightly.
Abstract Nucleation effects of two sorbitol derivatives on the crystallization of isotactic polypropylene (iPP) were studied by means of differential scanning calorimetry (DSC) and polarized optical microscopy (POM). A nonisothermal crystallization kinetic equation was employed to analyze the crystallization characteristics of iPP with or without the nucleating agents from DSC crystallization thermograms. The equilibrium melting temperature of iPP necessary for the kinetic study was obtained by
By utilizing cognitive mapping and leveraging georeferenced text data, this paper aims to suggest a new visualization method that combines the advantages of both conventional and state-of-the-art research techniques to depict the collective identity of place in a single image. The study addressed two research questions: (1) Can crowd-sourced text data be utilized in representing place identity? (2) Can collective place identity be expressed in the form of a cognitive map? By confirming that text
A new architecture and a statistical model for a pulse-mode digital multilayer neural network (DMNN) are presented. Algebraic neural operations are replaced by stochastic processes using pseudo-random pulse sequences. Synaptic weights and neuron states are represented as probabilities and estimated as average rates of pulse occurrences in corresponding pulse sequences. A statistical model of error (or noise) is developed to estimate relative accuracy associated with stochastic computing in terms
This paper explores the relationships between students’ activities, space choice patterns and satisfaction with campus space provision with the aim of establishing rational space utilization strategies. Many universities attempt to achieve their sustainability goals and address the constraints of space restrictions by implementing no-net growth policies and rational space utilization strategies. However, architects or facility managers often experience difficulties in keeping their commitment to
An experimental study combined with theory based on distribution kinetics shows how polystyrene degradation is enhanced by continuous addition of peroxide. We investigated polystyrene oxidative degradation kinetics by di-tert-butyl peroxide in the solvent trichlorobenzene at temperatures from 100 to 150 °C. The basic experimental data consisted of the time dependence of the polystyrene molecular-weight distribution (MWD). The model accounts for the rate of peroxide dissociation to radicals that
Advancements in remote sensing techniques and urban data analysis tools have enabled the successful monitoring and detection of green spaces in a city. This study aims to develop an index called the urban green accessibility (UGA) index, which measures people’s accessibility to green space and represents the citywide or local characteristics of the distribution pattern of green space. The index is defined as the sum of pedestrians’ accessibility to all vegetation points, which consists of the no
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