KR – Page 5 – TechConnect Briefs

Infrared laser precipitation of ZnAl2O4 nanocrystals doped with Eu3+ and Yb3+ ions and efficient upconversion emission

Bae C-H, Lim K-S, Chungbuk National University, KR

We present a novel and simple method to enable spatially selective ZnAl2O4 nanocrystal formation on the surface of glass. Zinc Aluminate, well-known as a wide band gap semiconductor, has been widely used as high temperature [...]

Nanostructural and biochemical property changes in activation-induced CD8+ T cell apoptosis utilizing AFM and Raman spectroscopy

Lee G.J., Lee Y.J., Lee G.J., Lee Y.J., Park H.K., Kyung Hee University, KR

This study was to investigate the changes in nanostructure and biochemical properties of activated mature CD8+ T cells related to apoptosis at a molecular level. We confirmed the activation and apoptosis of CD8+ T cells [...]

Effect of Charge Accumulation and Dielectric Polarization on EHD Patterning on Non-Conductive Substrates

Haque S., Lee S., Son S., Sungkyunkwan University, KR

Despite its merits in printing fine patterns, finer than the nozzle diameter used, and in employing high viscosity of ink [1], Electro-Hydro-Dynamic (EHD) printing is yet to be widely adopted due mainly to the charge [...]

Negative Dielectrophoretic Force based High Efficiency and High Throughput Cell Sorting System Harnessing Paired Electrode Arrays and a Meso Size Channel

Lee D., Hwang B., Kim B., Korea Aerospace University, KR

Dielectrophoresis activated cell sorters (DACS), which exploit intrinsic dielectric properties of target cells, are highlighted as an alternative cell sorting method. Nonetheless, the DACS performing in micro channel have limitation with throughput while they accomplished [...]

Active Air Bearing Technology for Compensating Multi-DOF Motion Errors of Ultra-Precision Motion Units

Ro S.-K., Khim G., Park J.K., Korea Institute of Machinery and Materials, KR

In this paper, we introduce rotary and linear motion units with active magnetic preloads and show experimental results for active compensation of motion errors by feedforward method. To compensate motion errors, linear stage and rotary [...]

Design process to minimize roof surface defect using flexural function computed by finite element method

Hwang S.Y., Jeong H.S., kim N.S., Sogang University, KR

Exterior curvature of the vehicle is one of the most important factors to evaluate the quality of the vehicle. During oven process, exterior of the roof is deformed. However this can be only identified under [...]

Bearing life prediction on the basis of run-out using accelerated life testing coupled with numerical analysis

Lee N.R., Hwang S.Y., Kim N., Sogang University, KR

Wear is one of the most important factors affecting roller bearing performance and in determining bearing life-time. Bearing life has traditionally been defined by the onset of spalling (ISO 281), but this definition does not [...]

FE Simulation of material removal and surface properties for EDM during single and multiple spark occurrences

Lim H.J., Domblesky J.P., Kim N., Hwang S.Y., Sogang University, KR

EDM represents an effective machining process for hard-to-machine materials. Although EDM has many advantages, it lacks well-developed technological base and level of fundamental understanding that characterizes other metal cutting technologies. This has limited the development [...]

Preparation of ion group functionalized diblock copolymers and examination of their thermogelling properties

Lee B.K., Kwon D.Y., Kwon J.S., Park J.H., Kwon D.Y., Kwon J.S., Kim J.H., Kim M.S., Oh S.H., Kim J.H., Kim M.S., Ajou University, KR

To investigate thermogelling behavior, in this study, methoxy polyethylene glycol-b-[poly(ε-caprolactone)-ran-poly(6-chloride-ε-caprolactone) (PCL-ran-PfCL)] (PCL-Cl) diblock copolymers were designed such that the PfCL content in the PCL segment was varied. The PCL-Cl diblock copolymers were derivatized by introducing [...]

Negative Dielectrophoretic Force based High Efficiency and High Throughput Cell Sorting System Harnessing Paired Electrode Arrays and a Meso Size Channel

Lee D., Hwang B., Kim B., Korea Aerospace University, KR

Dielectrophoresis activated cell sorters (DACS), which exploit intrinsic dielectric properties of target cells, are highlighted as an alternative cell sorting method. Nonetheless, the DACS performing in micro channel have limitation with throughput while they accomplished [...]