Search results for: C.-G. Kim

Items from 1 to 20 out of 33 results

article

Control of the weld quality using welding parameters in a robotic welding process

M.-H. Park, B.-J. Jin, T.-J. Yun, J.-S. Son, more

Journal of Achievements in Materials and Manufacturing Engineering > 2018 > Vol. 87, nr 1 > 32--40

Purpose: Since the welding automations have widely been required for industries and engineering, the development of the predicted model has become more important for the increased demands for the automatic welding systems where a poor welding quality becomes apparent if the welding parameters are not controlled. The automated welding system must be modelling and controlling the changes in weld characteristics...

article

Molecular characterization and expression analysis of pathogenesis related protein 6 from Panax ginseng

D. Myagmarjav, J. Sukweenadhi, Y. J. Kim, M. G. Jang, more

Russian Journal of Genetics > 2017 > 53 > 11 > 1211-1220

Panax ginseng Meyer is one of the important medicinal plants in the world, particularly in Asian countries. Ginseng encounters many stress exposure during its long cultivation period. However, the molecular mechanism of stress resistance is still poorly understood in spite of its importance. In this study, pathogenesis-related protein 6 (PR6), also called proteinase inhibitor (PI), was isolated from...

chapter

Defining Drug Interactions with the Viral Membrane Protein Vpu from HIV-1

V. Lemaitre, C. G. Kim, D. Fischer, Y. H. Lam, more

Protein Reviews > Viral Membrane Proteins: Structure, Function, and Drug Design > Viral Ion Channels/viroporins > 187-205

The replication of HIV-1 is strongly enhanced by a small membrane protein called virus protein U (Vpu). Vpu achieves its task by (a) interacting with CD4, the HIV-1 receptor, and (b) by amplifying particle release at the site of the plasma membrane. While the first role is due to interactions of the cytoplasmic site of Vpu with CD4, the second role may be due to ion channel activity caused by the...

chapter

CFD Analysis for the Performance of Cross-Flow Hydraulic Turbine with the Variation of Blade Angle

Y. D. Choi, J.. I. Lim, C. G. Kim, Y. T. Kim, more

New Trends in Fluid Mechanics Research > Industrial Fluid Mechanics > 428-431

The purpose of this study is both to further optimize the structure of cross-flow turbine and to improve the turbine performance. Optimization of the turbine structure has been made by the analysis of the turbine performance with the variation of the blade angle using a commercial CFD code. The results show that inlet and outlet angles of the runner blade give considerable effect on the performance...

article

Effect of soil acidification on n‐hexane extractable PAH fractions

B. Mahanty, C.‐G. Kim

European Journal of Soil Science > 67 > 1 > 60 - 69

This study was designed to assess the effect of soil acidification on the extractability of polycyclic aromatic hydrocarbons (PAHs) distributed across various soil organic matter fractions. Phenanthrene, anthracene and pyrene (each at 3.2 mg kg⁻¹ soil) were applied to a natural soil and to an artificially acidified soil, and the samples were incubated for 10 days. Several solvents were tested for...

article

Quantification of Thickness Effects for Circumferential Through-Wall Cracked Pipe Bend with Un-Uniform Thickness under In-Plane Opening Bending

C.-G. Kim, K.-D. Bae, Y.-J. Kim

Procedia Engineering > 2015 > 130 > Complete > 1779-1787

An Elbow is one of the major component that make up the piping system of a nuclear power plant and chemical plant facilities. In general, the elbow is made by welding a straight pipe and bend part. So, periodic welding inspection is required due to the potential defects in weld zone. Recently, the application of induction heating pipe bend is increasing in order to reduce this problem. Pipe bend made...

article

Existence of positive solutions to a Laplace equation with nonlinear boundary condition

C.-G. Kim, Z.-P. Liang, J.-P. Shi

Zeitschrift für angewandte Mathematik und Physik > 2015 > 66 > 6 > 3061-3083

The positive solutions of a Laplace equation with a superlinear nonlinear boundary condition on a bounded domain are studied. For higher-dimensional domains, it is shown that non-constant positive solutions bifurcate from a branch of trivial solutions at a sequence of bifurcation points, and under additional conditions on nonlinearity, the existence of a non-constant positive solution for any sufficiently...

article

A study on on-line mathematical model to control of bead width for arc welding process

J. S. Son, J. P. Lee, M. H. Park, D. H. Kim, more

Archives of Materials Science and Engineering > 2015 > Vol. 72, nr 2 > 78--85

Purpose: Recently, not only robotic welders have replaced human welders in many welding applications, but also reasonable seam tracking systems are commercially available. However, fully adequate control systems have not been developed due to a lack of reliable sensors and mathematical models that correlate welding parameters to the bead geometry for the automated welding process. Design /meth o d...

article

Long‐term metformin use reduces gastric cancer risk in type 2 diabetics without insulin treatment: a nationwide cohort study

Y.‐I. Kim, S. Y. Kim, S.‐J. Cho, J.‐H. Park, more

Alimentary Pharmacology & Therapeutics > 39 > 8 > 854 - 863

BackgroundMetformin use has been associated with a decreased incidence and mortality of various cancers. AimTo evaluate the association between metformin use and gastric cancer. MethodsWe randomly selected 100 000 type 2 diabetic patients from the 2004 Korean National Health Insurance claim database, and assessed gastric cancer incidence among 39 989 patients (aged 30–97 years) who were regularly...

chapter

Real-time FPGA implementation of Full HD@120Hz frame rate up-conversion system

D. Kim, Y. S. Cho, J. H. Lee, H. N. Byun, more

2014 IEEE International Conference on Consumer Electronics (ICCE) > 109 - 110

2014 IEEE International Conference on Consumer Electronics (ICCE)

This paper introduces a real-time Full HD@120Hz frame rate up-conversion system implemented on multiple FPGAs (FRC-FPGA). Since FRC-FPGA works like as FRC-IC in TV, we can display the interpolated frames, in real-time, which FRC-FPGA generates. Therefore, we can evaluate the performance of FRC-FPGA by directly comparing it with commercial TVs. For more improvement, we propose several FRC algorithms,...

article

Standard Uncertainty Evaluation for Dynamic Tensile Properties of Auto-Body Steel-Sheets

H. Huh, S. Jeong, G. W. Bahng, K. S. Chae, more

Experimental Mechanics > 2014 > 54 > 6 > 943-956

This paper is concerned with the standard uncertainty of the true stress–true strain curve as the tensile properties of auto-body steel sheets at intermediate strain rates ranged from 1 to 100 s⁻¹. A procedure to obtain true stress–true strain data is properly designed for the experiment and data acquisition. An analytic model is then established to evaluate the standard uncertainty of the measurand...

article

Staging of intestinal‐ and diffuse‐type gastric cancers with the OLGA and OLGIM staging systems

S.‐J. Cho, I. J. Choi, M.‐C. Kook, B.‐H. Nam, more

Alimentary Pharmacology & Therapeutics > 38 > 10 > 1292 - 1302

BackgroundOperative link on gastritis assessment (OLGA) and Operative link on gastric intestinal metaplasia assessment (OLGIM) staging systems have been proposed for gastric cancer (GC) risk estimation. AimTo validate the OLGA and OLGIM staging systems in a region with high risk of GC. MethodsThis retrospective study included 474 GC patients and age‐ and sex‐matched health screening control persons...

article

Randomised clinical trial: the effects of Helicobacter pylori eradication on glandular atrophy and intestinal metaplasia after subtotal gastrectomy for gastric cancer

S.‐J. Cho, I. J. Choi, M.‐C. Kook, H. Yoon, more

Alimentary Pharmacology & Therapeutics > 38 > 5 > 477 - 489

BackgroundHelicobacter pylori eradication is recommended for early gastric cancer (GC) patients after resection. AimTo evaluate whether H. pylori eradication improves glandular atrophy and intestinal metaplasia (IM) in GC patients undergoing subtotal gastrectomy. MethodsThis randomised, double‐blind trial was performed in tertiary care setting. Distal GC patients with H. pylori infection were randomised...

article

Wideband radar absorbing structure with low density material and load-bearing MWCNT added composite material

W.H. Choi, H.K. Jang, J.H. Shin, T.H. Song, more

Electronics Letters > 2013 > 49 > 9

A new design concept of a wideband radar absorbing structure consisting of load-bearing glass/MWCNT added epoxy composite and having low density/lightweight characteristics for C- to X-band and X- to Kuband radar is presented. The proposed radar absorbing structures have triple layers which are the low density and light weight layer to reduce the total weight, covering layers to protect the foam layer...

article

Design of thin circuit-analogue multilayer absorber and application to leading edge of wing structure

W.H. Choi, J.H. Shin, T.H. Song, J.B. Kim, more

Electronics Letters > 2013 > 49 > 3 > 216 - 217

A new thin multilayer circuit-analogue (CA) absorber design consisting of a patterned resistive sheet, glass/epoxy, and glass/ MWCNT-epoxy for X-band radar is presented. The proposed thin multilayer CA-absorber (a total thickness of 2.23 mm) has smaller thickness by 0.71 mm than a single-layer CA-absorber (a total thickness of 2.93 mm). Although the absorption bandwidth of the multilayer CA-absorber...

article

On-chip manipulation and trapping of microorganisms using a patterned magnetic pathway

R. Venu, B. Lim, X. H. Hu, I. Jeong, more

Microfluidics and Nanofluidics > 2013 > 14 > 1-2 > 277-285

We demonstrate on-chip manipulation and trapping of individual microorganisms at designated positions on a silicon surface within a microfluidic channel. Superparamagnetic beads acted as microorganism carriers. Cyanobacterium Synechocystis sp. PCC 6803 microorganisms were immobilized on amine-functionalized magnetic beads (Dynabead^® M-270 Amine) by 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC)–...

article

Physico-chemical characteristics of high performance polymer modified by low and atmospheric pressure plasma

Nitu Bhatnagar, Sangeeta Jha, Shantanu Bhowmik, Govind Gupta, more

Surface Engineering and Applied Electrochemistry > 2012 > 48 > 2 > 117-126

In this work, the effect of low pressure plasma and atmospheric-pressure plasma treatment on surface properties and adhesion characteristics of high performance polymer, Polyether Ether Ketone (PEEK) are investigated in terms of Fourier Transform Infrared Spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and Atomic Force Microscopy (AFM). The experimental results show that the PEEK surface...

article

Nanostructured Iron Oxide Platform for Impedimetric Cholesterol Detection

Ajeet Kaushik, Pratima R. Solanki, Keiichi Kaneto, C. G. Kim, more

Electroanalysis > 22 > 10 > 1045 - 1055

A nanostructured iron oxide (NanoFe₃O₄, particle size ca. 25 nm and roughness ca. 21 nm) film deposited onto a hydrolyzed indium‐tin‐oxide (ITO) coated glass plate has been used to immobilize cholesterol oxidase (ChOx) to fabricate an impedimetric cholesterol sensor. Electrochemical studies reveal that surface charged Fe₃O₄ nanoparticles provide better conformation for ChOx loading resulting in enhanced...

article

The Pulsed Eddy Current Differential Probe to Detect a Thickness Variation in an Insulated Stainless Steel

C. S. Angani, D. G. Park, C. G. Kim, P. Leela, more

Journal of Nondestructive Evaluation > 2010 > 29 > 4 > 248-252

Non-destructive testing (NDT) plays an important role in the safety and integrity of the large industrial structures such as pipelines in nuclear power plants (NPPs). The pulsed eddy current (PEC) is an electromagnetic NDT approach which is principally developed for the detection of surface and sub surface flaws. In this study a differential probe for the PEC system has been fabricated to detect the...

article

Synchronous gastric cancer in primary sporadic colorectal cancer patients in Korea

S. B. Lim, S. Y. Jeong, H. S. Choi, D. K. Sohn, more

International Journal of Colorectal Disease > 2008 > 23 > 1 > 61-65

Background and aims Colorectal cancer has been reported to be the malignancy most frequently associated with gastric cancer in Korea. The aim of this study was to define the frequency and clinical characteristics of synchronous gastric cancer detected at preoperative esophagogastroduodenoscopy (EGD) in colorectal cancer patients. Materials and methods This prospective study analyzed the EGD results...

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Search results for: C.-G. Kim

Control of the weld quality using welding parameters in a robotic welding process

Molecular characterization and expression analysis of pathogenesis related protein 6 from Panax ginseng

Defining Drug Interactions with the Viral Membrane Protein Vpu from HIV-1

CFD Analysis for the Performance of Cross-Flow Hydraulic Turbine with the Variation of Blade Angle

Effect of soil acidification on n‐hexane extractable PAH fractions

Quantification of Thickness Effects for Circumferential Through-Wall Cracked Pipe Bend with Un-Uniform Thickness under In-Plane Opening Bending

Existence of positive solutions to a Laplace equation with nonlinear boundary condition

A study on on-line mathematical model to control of bead width for arc welding process

Long‐term metformin use reduces gastric cancer risk in type 2 diabetics without insulin treatment: a nationwide cohort study

Real-time FPGA implementation of Full HD@120Hz frame rate up-conversion system

Standard Uncertainty Evaluation for Dynamic Tensile Properties of Auto-Body Steel-Sheets

Staging of intestinal‐ and diffuse‐type gastric cancers with the OLGA and OLGIM staging systems

Randomised clinical trial: the effects of Helicobacter pylori eradication on glandular atrophy and intestinal metaplasia after subtotal gastrectomy for gastric cancer

Wideband radar absorbing structure with low density material and load-bearing MWCNT added composite material

Design of thin circuit-analogue multilayer absorber and application to leading edge of wing structure

On-chip manipulation and trapping of microorganisms using a patterned magnetic pathway

Physico-chemical characteristics of high performance polymer modified by low and atmospheric pressure plasma

Nanostructured Iron Oxide Platform for Impedimetric Cholesterol Detection

The Pulsed Eddy Current Differential Probe to Detect a Thickness Variation in an Insulated Stainless Steel

Synchronous gastric cancer in primary sporadic colorectal cancer patients in Korea

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