23 Result(s)

Article

Estimation of Fracture Toughness of Metallic Materials Using Instrumented Indentation: Critical Indentation Stress and Strain Model

We propose a generalized approach based on fracture mechanics and contact mechanics to estimate the fracture toughness in metallic materials from instrumented indentation testing. Models were developed for bri...

S.-W. Jeon, K.-W. Lee, J. Y. Kim, W. J. Kim, C.-P. Park, D. Kwon in Experimental Mechanics (2017)

Article

TFAP2C promotes lung tumorigenesis and aggressiveness through miR-183- and miR-33a-mediated cell cycle regulation

Non-small cell lung cancer (NSCLC) remains one of the leading causes of death worldwide, and thus new molecular targets need to be identified to improve treatment efficacy. Although epidermal growth factor rec...

J Kang, W Kim, S Lee, D Kwon, J Chun, B Son, E Kim, J-M Lee, H Youn, B Youn in Oncogene (2017)

Article

Multiparametric evaluation of preoperative MRI in early stage breast cancer: prognostic impact of peri-tumoral fat

Obesity is associated with adverse outcomes in breast cancer patients. Fat-specific cytokines (adipokines) have been proposed as key drivers of breast cancer progression, invasion, and metastasis. We aimed at ...

J.-P. Obeid, R. Stoyanova, D. Kwon, M. Patel… in Clinical and Translational Oncology (2017)

Article

Deep Levels in n-Type Schottky and p⁺-n Homojunction GaN Diodes

The deep level spectra in both p⁺-n homojunction and n-type Schottky GaN diodes are studied by deep level transient spectroscopy (DLTS) in order to compare the role of the junction configuration on the defects fo...

A. Hierro, D. Kwon, S. A. Ringel, M. Hansen, U. K. Mishra… in MRS Online Proceedings Library (2012)

Article

Nondestructive evaluation of flow properties in thermally aged Cr–Mo–V steel using instrumented indentation tests

Instrumented indentation technique has been utilized to assess the flow properties in X20CrMoV12.1 steel, widely used in power generation facilities, at various heat treatment stages simulating thermal aging d...

J.-Y. Kim, J.-J. Lee, K.-W. Lee, D. Kwon in Journal of Materials Science (2009)

Chapter and Conference Paper

Tracking of Cerebral Arterial Segment by Particle Filtering in CT Angiography

In this paper a method to extract a segment of cerebral arteries from CT angiography (CTA) is proposed. Since the CTA shows both bone and vessels, the examination of vessels is a challenging task. It is also v...

H. Shim, D. Kwon, Prof. Il Dong Yun… in World Congress on Medical Physics and Biom… (2007)

Article

Injection of skeletal muscle-derived cells into the penis improves erectile function

We investigated the effect of intrapenile injection of muscle-derived cells (MDC) on the erectile function in rats with bilateral cavernous nerve injury. Rat MDC were harvested and transduced with a retrovirus...

Y Kim, F de Miguel, I Usiene, D Kwon… in International Journal of Impotence Research (2006)

Chapter and Conference Paper

Effects of Subcarrier Interleaving on LDPC Coded MC-CDMA Systems

Y. Lee, K. Kim, H. Park, D. Kwon in Multi-Carrier Spread-Spectrum (2006)

Article

Ubiquitin-proteasome pathway as a primary defender against TRAIL-mediated cell death

Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) induces apoptotic cell death as well as expression of proinflammatory genes such as CXCL8 in malignant human astrocytoma cells. However, the mole...

S. Kim, K. Choi, D. Kwon, E. N. Benveniste… in Cellular and Molecular Life Sciences CMLS (2004)

Article

Stress measurement of SS400 steel beam using the continuous indentation technique

An analytical model is presented for determining surface residual stress using continuous indentation. The elastic residual stress is assumed to have no influence on contact area or hardness and to be uniform ...

Y. -H. Lee, W. -j. Ji, D. Kwon in Experimental Mechanics (2004)

Article

Evaluation of microfracture toughness and microcracking with notch tip radius of Si film structure for microactuator in hard disk drives

 The technologies developed for macroscale testing are not necessarily applicable to evaluate the mechanical properties of structures with dimensions comparable to those of typical microsystems such as sensors...

S.-H. Lee, J. S. Kim, J. W. Evans, D. Son, Y. E. Pak… in Microsystem Technologies (2001)

Article

Micromechanical Analysis of Residual Stress Effect in CVD-Processed Diamond Wafer

Diamond wafer, considered as promising material for electronic substrate, thermal spreader, etc., has been made using deposition technology such as microwave plasma assisted CVD (MPACVD). However, high residua...

J. H. Jeong, D. Kwon, J. K. Lee, W. S. Lee, Y. J. Bai in MRS Online Proceedings Library (1999)

Article

Deep Level Characterization of Interface-Engineered ZnSe Layers Grown by Molecular Beam Epitaxy on GaAs

Deep level defects have been detected and analyzed in epitaxial ZnSe layers grown by molecular beam epitaxy (MBE) on GaAs and on In_0.04Ga_0.96As using deep level optical spectroscopy (DLOS). A series of samples, w...

A. Hierro, D. Kwon, S. A. Ringel, L. J. Brillson… in MRS Online Proceedings Library (1998)

Article

Distribution of tachykinin-related neuropeptide in the develo** central nervous system of the moth Spodoptera litura

Neuropeptides with similarities to vertebrate tachykinins, designated tachykinin-related peptides (TRPs), have been identified in several insect species. In this investigation we have utilized an antiserum rai...

Min-Yung Kim, Bong Hee Lee, D. Kwon, Hyuno Kang, D. R. Nässel in Cell and Tissue Research (1998)

Chapter

A Study of Fracture Toughness and Microstructures in the Weld Heat-Affected Zone of QLT-Processed 9% Ni Steel

The objective of this study, based on the concept of fitness-for-purpose, is to evaluate the fracture toughness in X-grooved weld HAZ(heat-affected zone) of QLT(quenching, lamellarizing and tempering)-processe...

J. Jang, Y. Yang, W. Kim, D. Kwon in Advances in Cryogenic Engineering Materials (1998)