김현석 교수

Hydrogen storage properties of mutiwalled carbon nanotubes (MWCNTs) with Ni nanoparticles were investigated. The metal nanoparticles were dispersed on MWCNTs surfaces using an incipient wetness impregnation procedure. Ni catalysts have been known to effectively dissociate hydrogen molecules in gas phase, providing atomic hydrogen possible to form chemical bonding with the surfaces of MWCNTs. Hydrogen desorption spectra of MWCNTs with 6 wt % of Ni nanoparticles showed that approximately 2.8 wt %

Abstract. Plant transpiration links physiological responses of vegetation to water supply and demand with hydrological, energy, and carbon budgets at the land–atmosphere interface. However, despite being the main land evaporative flux at the global scale, transpiration and its response to environmental drivers are currently not well constrained by observations. Here we introduce the first global compilation of whole-plant transpiration data from sap flow measurements (SAPFLUXNET, https://sapflux

One fundamental observation in cancer etiology is that the rate of malignancies in any mammalian population increases exponentially as a function of age, suggesting a mechanistic link between the cellular processes governing longevity and carcinogenesis. In addition, it is well established that aberrations in mitochondrial metabolism, as measured by increased reactive oxygen species (ROS), are observed in both aging and cancer. In this regard, genes that impact upon longevity have recently been

Facial nerve palsy induces a weakness or loss of facial expression through damage of the facial nerve. A quantitative and reliable assessment system for facial nerve palsy is required for both patients and clinicians. In this study, we propose a rapid and portable smartphone-based automatic diagnosis system that discriminates facial nerve palsy from normal subjects. Facial landmarks are localized and tracked by an incremental parallel cascade of the linear regression method. An asymmetry index i

Within the limitation of our study, BTX-A injections in masticatory musculatures of TMD patients could be considered as a useful option for controlling complex TMD and helping its associated symptoms.

본 연구는 인터넷 정치 토론의 담론적 특성을 알아보기 위해 2004년 국회의 대통령 탄핵 소추 의결 당시 인터넷 포털 다음(Daum)에서 벌어진 정치 토론을 분석했다. 특히 툴민(Toulmin, 1958)이 제시한 비형식적 논변구조 모형을 근거로 인터넷 정치 토론의 전반적 논변구성 방식을 검토했다. 또한 게시판 토론에 나타난 담론의 이야기 구조(narrative structure)의 채택과 토론자의 정서(emotion) 표출 방식에 대해서도 탐색했다. 이는 정치적 사안에 대한 논의에 있어서 토론자의 ‘이야기 구조(narrative)의 채택’과 그에 따른 주관적인 ‘정서의 표출’이 인터넷 토론의 비형식적 논변의 핵심요소를 구성한다고 보았기 때문이다. 연구결과, 인터넷 토론은 비형식적 논변구조를 활용하는 특성을 보이며, 이야기를 주장의 근거로 채택하는 경우가 많으며, 전반적으로 이성적이라기보다는 감성적인 주장을 전개한다는 것을 발견했다. 연구결과가 숙의 민주주의의 관점에서 주장되는 시민