Chung-Ang University

About: Chung-Ang University is a education organization based out in Seoul, South Korea. It is known for research contribution in the topics: Population & Thin film. The organization has 13381 authors who have published 26978 publications receiving 416735 citations. The organization is also known as: CAU & Chung.

A smart polysaccharide/drug conjugate for photodynamic therapy.

Abstract: Recent improvements in drug-carrier design for photodynamic therapy (PDT) have brought about significant advances for treating skin, breast, and lung tumors. The local high-dose strategy of PDT suggests beneficial therapeutic efficacy with high selectivity when using photosensitizing drugs for the target site, as well as reduced side effects for normal tissues. A variety of drug-carrying vehicles, such as nanoparticles, drug conjugates, and polymeric micelles have frequently exhibited characteristics that may make possible the successful delivery of photosensitizing drugs, thus improving cell entry and residence in tumor sites. However, these approaches have, thus far, achieved rather limited success, owing primarily to the practical obstacles inherent to natural in vivo conditions. In this study, we describe a novel molecular “Trojan horse” system that quickly switches into an aggressive molecule for tumor destruction within the environment of the tumor. Advances in functionality have enabled our system to exhibit an intelligent switch from a threedimensional supramolecular assembly (i.e., self-quenched state of photosensitizing drugs) into extended random molecules (i.e., dequenched state for singlet-oxygen production), which corresponds to a change in surface charge (Figure 1). This system may be more significant than any known photosensitizing drug conjugate thus far developed.

Toward the Model of University Image: The Influence of Brand Personality, External Prestige, and Reputation

Abstract: Although the concepts of image and reputation have been increasingly emphasized in the fields of public relations and marketing, the association of these 2 concepts has not been empirically studied within the public relations domain. Furthermore, although significant research into corporate image has been established, relatively less image research has been conducted on service-oriented organizations such as universities. The purpose of this study is to assess the impact of institutional image and image-related constructs on students' supportive attitude, which represents the student's commitment to and identification with the organization. After identifying the components that construct corporate image, the study examines the relationships among these constructs under the concept of corporate image. It also attempts to analyze the impact of this image in order to understand its influence on student recruitment, and to describe the strategic implications for university communication management. Structural...

Distributed Consensus Tracking for Multiple Uncertain Nonlinear Strict-Feedback Systems Under a Directed Graph

Abstract: In this brief, we study the distributed consensus tracking control problem for multiple strict-feedback systems with unknown nonlinearities under a directed graph topology. It is assumed that the leader's output is time-varying and has been accessed by only a small fraction of followers in a group. The distributed dynamic surface design approach is proposed to design local consensus controllers in order to guarantee the consensus tracking between the followers and the leader. The function approximation technique using neural networks is employed to compensate unknown nonlinear terms induced from the controller design procedure. From the Lyapunov stability theorem, it is shown that the consensus errors are cooperatively semiglobally uniformly ultimately bounded and converge to an adjustable neighborhood of the origin.

Selective metal deposition at graphene line defects by atomic layer deposition

Abstract: One-dimensional defects in graphene have a strong influence on its physical properties, such as electrical charge transport and mechanical strength. With enhanced chemical reactivity, such defects may also allow us to selectively functionalize the material and systematically tune the properties of graphene. Here we demonstrate the selective deposition of metal at chemical vapour deposited graphene’s line defects, notably grain boundaries, by atomic layer deposition. Atomic layer deposition allows us to deposit Pt predominantly on graphene’s grain boundaries, folds and cracks due to the enhanced chemical reactivity of these line defects, which is directly confirmed by transmission electron microscopy imaging. The selective functionalization of graphene defect sites, together with the nanowire morphology of deposited Pt, yields a superior platform for sensing applications. Using Pt–graphene hybrid structures, we demonstrate high-performance hydrogen gas sensors at room temperature and show its advantages over other evaporative Pt deposition methods, in which Pt decorates the graphene surface non-selectively. Defects in graphene strongly influence the material's physical properties, leading to the suggestion that defects might be tuned to improve performance. Here, via atomic layer deposition, the authors selectively deposit Pt at graphene line defects and yield a superior platform for sensing applications.