• Proceedings of the KSR Conference
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• 2005.05a
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• pp.1138-1145
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• 2005

The public, mass transportation, monopoly, speediness and the long distance transportation of railway have realized by representative advantage from former days. But realization for railway that is declining by industry on the decline by the 1970s since the 1st World War has been changing recently newly. Development of a technology and fast change of industry environment exerted big effect about traffic. And IT and wave in 21C that is spoken for to environment changed together paradigm for railway. Now, is forecasted that period 'Renaissance of railway' may set on the near future because road embankment is getting into the spotlight again by the future alternative among transportation worldwide. In this paper, characteristic of railway to move altered how, and paradigms of been rising railway quality wish to examine what it is newly.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2012.04a
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• pp.729-733
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• 2012

Frame structures of High speed train are constructed from corrugated panel and aluminum extruded panel, which have high bending stiffness. Transmission loss of those panels, however, is less satisfactory than other panels with same mass per unit area. Therefore, this study predicted transmission loss of aluminum extruded panels using Finite element method. Specifically, we modeled acoustic cavity above a radiation surface and analyzed correlation between T-slot and transmission loss. Moreover, we examined the effect of boundary condition changes of the structure on transmission.

• Molecular & Cellular Toxicology
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• v.5 no.3
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• pp.198-206
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• 2009

Microarray and proteomic expression patterns in response to cadmium exposure were analyzed in human lung epithelial cells. Among 35,000 genes analyzed by cDNA microarray, 228 genes were up-regulated and 99 genes were down-regulated, based on a fold change cut-off value of ${\geq}2$. Combining two-dimensional gel electrophoresis and matrix-assisted laser desorption/ionization-time-of-flight-mass spectrometry (MALDI-ToF-MS), 25 of 629 protein spots showed fold changes in expression ${\geq}2$ (17 up-regulated, 8 down-regulated). After comparing the cDNA microarray and proteomic analyses, only transglutaminase 2, translation elongation factor 1 alpha 1, and glyceraldehyde-3-phosphate dehydrogenase showed overlapping signals in the cDNA microarray and proteomic analyses, whereas the remaining differentially expressed proteins showed large discrepancies with respect to mRNA expression.

• Publications of The Korean Astronomical Society
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• v.19 no.1
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• pp.21-25
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• 2004

We analyzed the high resolution H,6 line spectra of CH Cygni obtained at the Bohyunsan Astronomical Observatory (BOAO) on April 2004. The temporal changes in the $H\beta$ line profiles are reported. We obtained the equivalent widths of the Gaussian components. Using this we estimated the length of the gaseous nebula which emits the $H\beta$ line and the mass loss rate from the star.

• Journal of Electrical Engineering and Technology
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• v.11 no.3
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• pp.751-758
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• 2016

The modifiable walking pattern generation (MWPG) algorithm can handle dynamic walking commands by changing the walking period, step length, and direction independently. When an infeasible command is given, the algorithm changes the command to a feasible one. After the feasibility of the navigational command is checked, it is translated into the desired center of mass (CM) state. To achieve the desired CM state, a reference CM trajectory is generated using predefined zero moment point (ZMP) functions. Based on the proposed algorithm, various complex walking patterns were generated, including backward and sideways walking. The effectiveness of the patterns was verified in dynamic simulations using the Webots simulator.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.24 no.9 s.180
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• pp.2274-2282
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• 2000

An MR(Magneto-Rheological) fluid damper is designed and applied to the semi-active suspension system of a 1/4 car model. The damping constant of the MR damper changes according to input current and the time delay of the damper is included in the system dynamics. The passive method, LQ control and Frequency shaped LQ control are compared in experiments. The advantage of the proposed frequency shaped LQ control is that the ride comfort improves in frequency range from 4 to 8Hz where human body is most sensitive and the driving safety improves around the resonance frequency of unsprung mass, 11Hz. The experiments using a 1/4 car model show the effectiveness of the algorithm.

• Asian-Australasian Journal of Animal Sciences
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• v.7 no.2
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• pp.223-229
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• 1994

The metabolic fate of methionine in rumen bacteria was studied by intraruminal administration of $^{15}N$ and $1-^{13}C$ labeled methionine in goats. Time course changes in isotopic abundance of amino acids in the rumen bacteria were determined with a computer-controlled gas-chromatograph mass spectrometer. The results from the transition of peak isotopic abundance in amino acids indicated that in rumen bacteria the $^{15}N$ or $^{13}C$ isotope in the methionine molecule was transferred rapidly to into bacteria, methionine administered intraruminally may not be retained as it is, but would be converted quickly to other metabolites in the bacteria.

• Proceedings of the KSME Conference
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• 2003.11a
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• pp.338-343
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• 2003

Computations were performed to investigate the spray characteristics of the twin fluid nozzle in three stage heavy-oil combustion burner. The burner geometry and flow conditions were provided by a burner company. The goal of the study is to estimate mean droplet size, initial velocity and spread factor of the nozzle through comparison between experiments and numerical analyses. Air stage ratio is 2:4:4 by mass, and O2 in exhaust gas is about 4 % by volume. Here, the agreement between the experiment and numerical analyses is evaluated by NOx generation. Spray characteristics will be linearly interpolated between fuel consumption rate l20L/h and 240 L/h.

• Proceedings of the Microbiological Society of Korea Conference
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• 2002.10a
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• pp.203-205
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• 2002

Light is an environmental signal that regulates photomovement and main energy source of photosynthesis in the cyanobacterium Synechocystis sp. PCC 6803 (Syn6803). Syn6803 is a popular model system for study of plant functional genomics. In this report, we adopted 2D gel based proteomics study to investigate proteins related with the light absorption and photo-protection in Syn6803. More than 700 proteins were detected on the SDS-gels stained with silver nitrate. Several proteins showing different expression level under various light conditions were identified with MALDI-TOF Mass spectrometry. As a comparison, we also conducted ICAT-based proteome study using WT and cphl (cyanobacterial phytochrome 1) mutant. A cphl deletion led to changes in the expression of proteins involved in translation, photosynthesis including photosystem and CO2 fixation, and cellular regulation. We are currently involved in TAP-tagging method to study protein-protein interactions in search for the molecular component involved in the light signal transduction of Syn6803 photomovement.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2016.10a
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• pp.54-55
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• 2016

Recently in the construction industry, industrial by-product admixtures like blast-furnace slag fine particles (BS henceforth) are being used as binding material, reducing the use of cement, and measures to reduce CO₂ emissions are being examined on various levels. However, the BS being used domestically varies depending on the origin of resources, and by circulating BS that is inappropriate to the KS standard, problems are occurring in terms of changes and declines in the quality of concrete which uses it. Therefore in this study the liquid densimeter principle was used to assess various BS fineness qualities; with 100 g/L fixed, a 1,000cc mass cylinder was most appropriate for assessing the quality of cement fineness.