park jaeyoung - Academia.edu (original) (raw)

Papers by park jaeyoung

The downscaling of the feature size and pitches of the semi-conductor device requires enough proc... more The downscaling of the feature size and pitches of the semi-conductor device requires enough process window and good CDU of exposure field for improvement of device characteristics and high yield. Recently several DBMs (Design Based Metrologies) are introduced for the wafer verification and feed back to for DFM and process control. The major applications of DBM are OPC feed back, process window qualification and advanced process control feed back. With these tools, since the applied tool in this procedure uses e-beam scan method with database of design layout like other ones, more precise and quick verification can be done. In this work the process window qualification procedure will be discussed in connection with EDA simulation results and then method for obtaining good CDU will be introduced. DoseMapperTM application has been introduced for better field CDU control, but it is difficult to fully correct large field with limited data from normal CD SEM methodology. New DBM has strong points in collecting lots of data required for large field correction with good repeatability (Intra / Inter field).

A switched-capacitor logarithmic pipeline ADC scheme that does not require squaring or any other ... more A switched-capacitor logarithmic pipeline ADC scheme that does not require squaring or any other complex analog functions is described. This approach is ideal where a high dynamic range, but not a high peak SNDR, is required. A signed, 8-bit 1.5 bit-per-stage logarithmic pipeline ADC is implemented in 0.18 mum CMOS. The 22 MS/s ADC achieves a measured DR of 80 dB and a measured SNDR of 36 dB, occupies 0.56 mm2, and consumes 2.54 mW from a 1.62 V supply. The measured dynamic range figure of merit is 174 dB.

Environmental Technology, 2011

The removal of heavy metals, such as As, Ni, Zn, Cd and Pb, onto limestone, starfish, black shale... more The removal of heavy metals, such as As, Ni, Zn, Cd and Pb, onto limestone, starfish, black shale and concrete from wastewater was studied. These materials, with a high capacity for heavy metals, can be obtained and employed as alternative low-cost substitutes. Various parameters, such as the neutralization capacity, changes in pH, redox potential and electric conductivity as a function of time, were quantified. Of the studied treatment agents, concrete showed high neutralization efficiency for acid mine drainage and maintained a pH value above 11. The adsorption of heavy metals was influenced by the compositions of the treatment agents. The experimental results of leaching revealed no significant follow-up release from any of the treatment agents. The results suggest that concrete could be used successfully for the treatment of mixed metal-contaminated wastes.

Ieice Transactions, 2007

ABSTRACT

Korean Journal of Chemical Engineering, 1998

The effects of pressure drop on the dynamics of fixed-beds were theoretically studied. The system... more The effects of pressure drop on the dynamics of fixed-beds were theoretically studied. The system used was an H2/CO mixture (70 vol% H2, 30 vol% CO) in zeolite 5A. The pressure drop at the pressurization step affected the breakthrough time at an adsorption step in the PSA process. As a result, the combined effects of pressure drop during adsorption and pressurization steps led to earlier breakthrough compared to the case without a pressure drop. The effect of pressure drop at the adsorption step under the non-isothermal condition was slightly larger than that under the adiabatic condition. In the case of pressurization and blowdown steps with large pressure drop, the flow pattern near the open end during a short period of time had to be explained by the Ergun equation instead of Darcy’s law. However, there was only a slight difference in the results of a multi-bed PSA process depending on whether or not the pressure drops at the pressurization/depressurization steps as well as at the adsorption step were considered.

Two methods are presented that can substantially reduce the memory requirements of non-binary tur... more Two methods are presented that can substantially reduce the memory requirements of non-binary turbo decoders by efficient representation of the extrinsic information. In the case of the duo-binary turbo decoder employed by the IEEE 802.16e standard, the extrinsic information can be reduced by about 43%, which decreases the total decoder complexity by 18%. We also show that the proposed algorithm can be implemented by simple hardware architecture.

Chemical Physics, 2011

... Substituting exp( )K g into Equation 12b, one can show that is nothing but the cumulant expan... more ... Substituting exp( )K g into Equation 12b, one can show that is nothing but the cumulant expansion of the distribution of binding free energy fluctuation ( )ggg < > :15,19 [ ]ln exp e og = = (13) Here, o denotes 2 1 2 1 1 (2 1)! kokkk + + = = + where 2 1k + is the 2k+1-th cumulant for ...

IEEE Transactions on Circuits and Systems I-regular Papers, 2009

A 9-Gbit/s serial link transceiver for on-chip global signaling, and techniques for the design of... more A 9-Gbit/s serial link transceiver for on-chip global signaling, and techniques for the design of on-chip transmission lines, are presented. In a prototype device, a transmitter serializes 8-b 1.125-Gbyte/s parallel data and transmits serial data over a 5.8-mm lossy on-chip transmission line. A receiver de-serializes the received data with the help of a digitally tuned interpolator. An on-chip lossy transmission

A 9 Gbit/s serial link transceiver for on-chip global signaling is presented. A transmitter seria... more A 9 Gbit/s serial link transceiver for on-chip global signaling is presented. A transmitter serializes 8 b 1.125 Gbyte/s parallel data and transmits over 5.8 mm of lossy on-chip transmission line. The receiver de-serializes the data with the help of a digitally-tuned interpolator. An error checking block verifies the recovered and de-serialized data against the original data and counts the

Talanta, 2010

We demonstrate a novel reference electrode material namely an organometallic silver complex e.g.,... more We demonstrate a novel reference electrode material namely an organometallic silver complex e.g., silver (I) tetramethylbis(benzimidazolium) diiodide [1a] for both acid and alkaline electrolysis. The potential usage of the silver complex as a reference electrode with at least equal electrochemical capabilities compared to those of the conventional electrode materials (e.g., Hg/HgO in alkaline media and Ag/AgCl in acidic media) are also demonstrated using cyclic voltammetry. In addition, the well dispersed surface morphology and fine crystalinity of the silver complex is investigated using field-emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD).

IEEE Transactions on Robotics, 2007

Bioinformatics/computer Applications in The Biosciences, 2008

Genomes of more than 60 fungal species have been sequenced to date, yet there has been no systema... more Genomes of more than 60 fungal species have been sequenced to date, yet there has been no systematic approach to analyze fungal transcription factors (TFs) kingdom widely. We developed a standardized pipeline for annotating TFs in fungal genomes. Resulting data have been archived in a new database termed the Fungal Transcription Factor Database (FTFD). In FTFD, 31 832 putative fungal TFs, identified from 62 fungal and 3 Oomycete species, were classified into 61 families and phylogenetically analyzed. The FTFD will serve as a community resource supporting comparative analyses of the distribution and domain structure of TFs within and across species. Availability: All data described in this study can be browsed through the FTFD web site at http://ftfd.snu.ac.kr/. Contact: yonglee@snu.ac.kr

Japanese Journal of Applied Physics, 2008

Organic thin-film transistors (OTFTs) with high crystallization copper phthalocyanine (CuPc) acti... more Organic thin-film transistors (OTFTs) with high crystallization copper phthalocyanine (CuPc) active layers were fabricated by inserting an ultrathin pentacene buffer layer between the dielectric and CuPc layers. Comparing with the OTFTs without a pentacene buffer layer, the charge carrier mobility of the OTFT with a buffer layer presented a much higher value of~0.20 cm 2 /V s. Meanwhile, by investigating the morphology of the CuPc active layer with an ultrathin pentacene buffer layer through scanning electron microscopy and X-ray diffraction, the high crystallization of the CuPc film with a larger grain size and less grain boundaries can be observed. As a result, the resistance of the conducting channel was decreased, leading to a performance improvement of the OTFTs.

In this paper, VLSI architecture for an efficient turbo decoder with parallel architecture has be... more In this paper, VLSI architecture for an efficient turbo decoder with parallel architecture has been studied to achieve high-throughput. For 100% PE utilization, a dividable interleaving method is proposed, which not only solves the memory conflict problem in extrinsic information memory, but also reduces the required memory for interleaver. We mapped the proposing parallel turbo decoder with 4 SISO's and a dividable S-random interleaver with 0.35 µm CMOS technology, which occupies 21.6 mm 2 , supports up to 41.8 Mb/s decoding rate.

IEEE Transactions on Plasma Science, 1998

Atmospheric-pressure plasmas are used in a variety of materials processes. Traditional sources in... more Atmospheric-pressure plasmas are used in a variety of materials processes. Traditional sources include transferred arcs, plasma torches, corona discharges, and dielectric barrier discharges. In arcs and torches, the electron and neutral temperatures exceed 3000 C and the densities of charge species range from 10 16 -10 19 cm 03 . Due to the high gas temperature, these plasmas are used primarily in metallurgy. Corona and dielectric barrier discharges produce nonequilibrium plasmas with gas temperatures between 50-400 C and densities of charged species typical of weakly ionized gases. However, since these discharges are nonuniform, their use in materials processing is limited. Recently, an atmospheric-pressure plasma jet has been developed, which exhibits many characteristics of a conventional, low-pressure glow discharge. In the jet, the gas temperature ranges from 25-200 C, charged-particle densities are 10 11 -10 12 cm 03 , and reactive species are present in high concentrations, i.e., 10-100 ppm. Since this source may be scaled to treat large areas, it could be used in applications which have been restricted to vacuum. In this paper, the physics and chemistry of the plasma jet and other atmospheric-pressure sources are reviewed.

Organic Electronics, 2009

We suggest a novel method for treating the surfaces of dielectric layers in organic field effect ... more We suggest a novel method for treating the surfaces of dielectric layers in organic field effect transistors (OFETs). In this method, a blend of poly(9,9-dioctylfluorene-alt-bithiophene) (F8T2) and dimethylsiloxane (DMS) with a curing agent is spin coated onto the surface of a dielectric substrate, silicon oxide (SiO 2 ), and then thermally cured. X-ray photoelectron spectroscopy, contact angle measurements, and morphology analysis were used to show that the hydrophilic DMS layer is preferentially adsorbed on the SiO 2 substrate during the spin coating process. After thermal curing, the bottom DMS layer becomes a hydrophobic PDMS layer. This bottom PDMS layer becomes thinner during curing due to the upward motion of the hydrophobic PDMS molecules. The FET mobility of the cured system was 10 À2 cm 2 /Vs, which is similar to that of polymeric semiconductors on octadecyltrichlorosilane treated SiO 2 dielectric layers. We also discuss the possibility of using this blend method to increase the air-stability of polymeric semiconductors.

BMC Genomics, 2008

Background: Cytochrome P450 enzymes play critical roles in fungal biology and ecology. To support... more Background: Cytochrome P450 enzymes play critical roles in fungal biology and ecology. To support studies on the roles and evolution of cytochrome P450 enzymes in fungi based on rapidly accumulating genome sequences from diverse fungal species, an efficient bioinformatics platform specialized for this super family of proteins is highly desirable.

This paper proposes the bus-tie application scheme of HTS-FCL (high temperature superconducting f... more This paper proposes the bus-tie application scheme of HTS-FCL (high temperature superconducting fault current limiter). The reduced amount of fault current by HTS-FCL is different by where the HTS-FCL is located. Therefore the inflow ratio of fault current (IRFC) is suggested to consider the effect of HTS-FCL's location. The proposed scheme was applied to the Korean Power System of 2010, and fault currents were calculated and analyzed with this coefficient. Simulations show that the location with high IRFC is adequate to install HTS-FCL but more considerations of other things are required to determine the location and capacity of HTS-FCL. Index Terms --bus-tie, fault current, fault current limiter, superconductivity Jong-young Park received his B.S., M.S., and Ph.D. degrees from Seoul National University, Korea in 1999, 2001, and 2007, respectively. Currently, he is a senior researcher at the Korea Electrotechnology Research Institute (KERI). His research interests include the control of reactive power, IT applications to energy management systems, and the application of the superconducting devices in power systems. Seung-ryul Lee received his B.S. and M.S. degrees in Electrical Engineering Department from KOREA University in 1999 and 2001, respectively. He has been working at the Korea Electrotechnology Research Institute (KERI) since 2003. His research interests are in the areas of power system analysis and application of HTS devices such as fault current limiters, cables and transformers.

Environmental Technology, 2012

Science of The Total Environment, 2007

Given the importance of water quality in drinking water sources, the Korean Ministry of Environme... more Given the importance of water quality in drinking water sources, the Korean Ministry of Environment is designing and instigating the total maximum daily load (TMDL) program for major large rivers. For the successful implementation of this program, nonpoint pollutants resulting from various land uses should be controlled. Especially, paved areas such as parking lots and bridges are stormwater intensive land uses because of their high imperviousness and high pollutant mass emissions from vehicular activity. Vehicle emissions from these paved areas include various pollutants such as heavy metals, oil, grease and particulates. This research was conducted to investigate the magnitude and nature of the stormwater emissions with the goal of quantifying stormwater pollutant concentrations and mass emission rates from a parking lot and a bridge. Two monitoring sites in Kongju city were equipped with an automatic rainfall gauge and an automatic flow meter for measuring rainfall, water quality and runoff flow. This study presents the concentration changes during storm occurrence and event mean concentrations (EMCs) in the parking lot and bridge. The first flush criteria, a new concept explaining the relationship between EMC and the first flush effect, is also suggested using dynamic EMCs.