• Publications
  • Influence
MCBT: Multi-Hop Cluster Based Stable Backbone Trees for Data Collection and Dissemination in WSNs
TLDR
We propose a distributed algorithm to create a stable backbone by selecting the nodes with higher energy or degree as the cluster heads. Expand
  • 28
  • 3
  • PDF
Social media and political discussion: when online presence silences offline conversation
ABSTRACT This paper explores the relationship between the use of social media, attitudinal strength, perceived opinion agreement with social ties, and willingness to discuss a political issue inExpand
  • 44
  • 1
  • PDF
Analysis of TiO2 thickness effect on characteristic of a dye-sensitized solar cell by using electrochemical impedance spectroscopy
Abstract Dye-sensitized solar cell (DSC) consists of a TiO 2 nano film of the photo electrode, dye molecules on the surface of the TiO 2 film, an electrolyte layer and a counter electrode. AmongExpand
  • 62
  • 1
Necessary skills in English for Korean postgraduate engineering students in London
This paper aims to investigate needs for skills in English of Korean postgraduate engineering students in an academic community. In raising these issues, this research compares the perceptions ofExpand
  • 5
  • 1
Virtual Convex Polygon Based Hole Boundary Detection and Time Delay Based Hole Detour Scheme in WSNs
TLDR
We propose a novel virtual convex polygon based hole boundary detection and time delay based hole detour scheme that solves first and second hole diffusion problems. Expand
  • 12
Faster dye-adsorption of dye-sensitized solar cells by applying an electric field
Abstract In the conventional dye-adsorption process of dye-sensitized solar cells (DSCs), the FTO/TiO 2 photo electrode is soaked in the dye solution, allowing dye molecules to be adsorbed onto theExpand
  • 35
Method for fabricating the compact layer in dye-sensitized solar cells by titanium sputter deposition and acid-treatments
Abstract Dye-sensitized solar cells (DSCs) have been put forward as a potential low-cost alternative to the widely used silicon solar cells, which are subject to cost limitations. However, someExpand
  • 33
The analysis of the change in the performance and impedance of dye-sensitized solar cell according to the dye-adsorption time
Abstract Dye-sensitized solar cells (DSCs) have been expected to be an alternative to the conventional silicon solar cell because of its advantages such as simple fabrication process, lowExpand
  • 22
Enhancement in the photovoltaic performance of a dye-sensitized solar cell by an optimized ZnO barrier layer
A dye-sensitized solar cell (DSC) has been considered as a strong alternative to conventional photovoltaic devices based on semiconductors such as silicon or compound semiconductors. The barrierExpand
  • 7
The photo-characteristics of (Bi1−xZnx)S quantum dot complex and multilayer structure for the application to the dye-sensitized solar cell
Abstract In recent years, many quantum dot (QD) materials were investigated and applied as the sensitizer replacing organic dyes in the dye-sensitized solar cell (DSC). QD materials can tune theirExpand
  • 6