• Title/Summary/Keyword: EDC

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A Network Storage LSI Suitable for Home Network

  • Lim, Han-Kyu;Han, Ji-Ho;Jeong, Deog-Kyoon
    • JSTS:Journal of Semiconductor Technology and Science
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    • v.4 no.4
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    • pp.258-262
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    • 2004
  • Storage over Ethernet (SoE) is a network storage architecture that allows direct attachment of existing ATA/ATAPI devices to Ethernet without a separate server. Unlike SAN, no server computer intervenes between the storage and the client hosts. We propose a SoE disk controller (SoEDC) amenable to low-cost, single-chip implementation that processes a simplified L3/L4 protocol and converts commands between Ethernet and ATA/ATAPI, while the rest of the complex tasks are performed by the remote hosts. Thanks to simple architecture and protocol, the SoEDC implemented on a single $4mm{\times}4mm$ chip in 0.18um CMOS technology achieves maximum throughput of 55MB/s on Gigabit Ethernet, which is comparable to that of a high-performance disk storage locally attached to a host computer.

Peptide C-terminal Sequence Analysis by MALDI-TOF MS Utilizing EDC Coupling with Br Signature

  • Shin, Man-Sup;Kim, Hie-Joon
    • Bulletin of the Korean Chemical Society
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    • v.32 no.4
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    • pp.1183-1186
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    • 2011
  • The unique Br signature was utilized for C-terminal amino acid sequencing of model peptides. C-terminal carboxyl group was selectively derivatized in peptides, containing side chain carboxyl group, using 1-ethyl-3-[3-dimethylaminopropyl]carbodiimide hydrochloride (EDC) and Br was introduced using 4-bromophenylhydrazine hydrochloride (BPH) in a one pot reaction. Matrix-assisted laser desorption/ionization (MALDI) time-of-flight (TOF) tandem mass spectra were obtained carrying the Br signature in the y-series ions. The Br signature facilitated C-terminal sequencing and discrimination of C-terminal carboxyl groups in the free acid and amide forms.

Formation of MILD Combustion using Co-flow MILD Combustor (동축류 마일드 연소기를 적용한 마일드 연소 형성 연구)

  • Lee, Pil Hyong;Hwang, Sang Soon
    • Journal of the Korean Society of Combustion
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    • v.22 no.3
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    • pp.8-16
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    • 2017
  • MILD combustion was first developed to suppress thermal NOx formation in combustor for heating industrial furnaces. In this paper, the effect of co-flow MILD combustor geometry and operating conditions on the formation of MILD combustion was analyzed using 3 dimensional numerical simulation. The numerical simulations were carried out using ANSYS Fluent. The combustion and turbulence flow was modeled using the Eddy Dissipation Concept(EDC) model and realizable $k-{\varepsilon}$ model respectively. The results show that the high temperature region and average temperature decreased due to an increase in the air velocity and decrease the wall thickness of fuel nozzle. In particular, the MILD combustion flame was found to be stable with a combustion flame region at fuel velocity 10 m/s, air velocity 20 m/s, fuel nozzle thickness 1.0 mm, equivalence ratio 0.9, and outlet area ratio 40%.

Development of PMSM for Electric Drive Compressor Part 2 : Reduction of Noise Level (전동식 압축기용 영구자석 동기전동기 개발 Part 2 - 소음저감)

  • Lee, Jung-Kyung;Koo, In-Hwe;Lee, Geun-Ho;Lee, Je-Hie;Yeo, Hyeong-Gee
    • Proceedings of the KSME Conference
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    • 2008.11b
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    • pp.2594-2599
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    • 2008
  • This study deals with the development of PMSM(Permanent Magnet Synchronous Motor) for automotive EDC(Electric Drive Compressor). We have already developed the previous version of PMSM. It showed the characteristics of small size and high efficiency. But noise and vibration levels were higher than target values, so it was impossible to apply. So, in order to reduce noise and vibration levels, many parameters like the numbers of slots, the numbers of winding turns, and slot open width were changed. As a result, noise level of newly developed PMSM was decreased about 36.9% at maximum operating frequency (8600 rpm), and was reduced about 37.7% at rated frequency (6000 rpm) with the same sized and more efficient PMSM.

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Toxic effects of Aroclor 1016 and bisphenol A on marine green algae Tetraselmis suecica, diatom Ditylum brightwellii and dinoflagellate Prorocentrum minimum (해양 녹조류 Tetraselmis suecica, 규조류 Ditylum brightwellii, 와편모조류 Prorocentrum minimum에 대한 Aroclor 1016과 비스페놀 A의 독성 효과)

  • Ebenezer, Vinitha;Ki, Jang-Seu
    • Korean Journal of Microbiology
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    • v.52 no.3
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    • pp.306-312
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    • 2016
  • Microalgae are the potential bioindicators of environmental changes, for the environmental risk assessment as well as to set limits for toxic chemical release in the aquatic environment. Here, we evaluated the effects of two endocrine disrupting chemicals (EDCs), namely bisphenol A (BPA) and Aroclor 1016, on the green algae Tetraselmis suecica, diatom Ditylum brightwellii, and dinoflagellate Prorocentrum minimum. Each species showed wide different sensitivity ranges when exposed to these two EDCs; the 72 h effective concentration ($EC_{50}$) for these test species showed that Aroclor 1016 was more toxic than BPA. $EC_{50}$ values for the diatom D. birghtwellii were calculated at 0.037 mg/L for BPA and 0.002 mg/L for Aroclor 1016, representing it was the most sensitive when compared to the other species. In addition, these results suggest that these EDC discharge beyond these concentrations into the aquatic environments may cause harmful effect to these marine species.

Infrared Spectroscopy and Differential Scanning Calorimetry of Silk Fibroin/Hyaluronic Acid Blend Film (견피브로인/히아론산 브렌드 필름의 적외선 분광 분석 및 시차열분석)

  • Kweon HaeYong;Lee Kwang-Gill;Yeo Joo-Hong;Woo SoonOk;Han SangMi;Lee Yong Woo;Lee Jang Hern;Park Young Hwan
    • Journal of Sericultural and Entomological Science
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    • v.46 no.1
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    • pp.28-31
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    • 2004
  • Bombyx mori silk fibroin/hyaluronic acid blend films were prepared by mixing aqueous solution of B. mori silk fibroin and hyaluronic acid. According to the FTIR spectra, no interaction between silk fibroin and hyaluronic acid was found. The conformation of silk fibroin in blend films was changed from random coil to $\beta$-sheet structure by treatment of EDC ethanol solution. Thermal degradation peak of silk fibroin and hyaluronic acid was also not altered by blending each other. The average swelling ratio of silk fibroin/hyaluronic acid blend films was 70. Therefore, silk fibroin/hyaluronic acid blend films might be one of possible wound dressing materials.

Effect of dentin biomodifiers on the immediate and long-term bond strengths of a simplified etch and rinse adhesive to dentin

  • Singh, Payal;Nagpal, Rajni;Singh, Udai Pratap
    • Restorative Dentistry and Endodontics
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    • v.42 no.3
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    • pp.188-199
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    • 2017
  • Objectives: This in vitro study evaluated the effect of dentin biomodifiers on the immediate and long-term bond strengths of a simplified etch and rinse adhesive to dentin. Materials and Methods: Flat coronal dentin surfaces were prepared in 120 extracted human molars. Teeth were randomly divided into 5 groups (n = 24) according to 5 different surface pre-treatments: No pre-treatment (control); 1M carbodiimide (EDC); 0.1% epigallocatechin-3-gallate (EGCG); 2% minocycline (MI); 10% sodium ascorbate (SA). After surface pre-treatment, adhesive (Adper Single Bond 2 [SB], 3M ESPE) was applied. Composite was applied into transparent plastic tubes (2.5 mm in diameter), which was placed over the bonded dentin surface. From each group, 10 samples were subjected to shear bond strength (SBS) evaluation at 24 hours (immediate) and remaining 10 samples were tested after 6 months (delayed). Additionally, 4 samples per group were subjected to scanning electron microscopic analysis for observation of resin-dentin interface. The data were statistically analysed with Shaperio-Wilk W test, 2-way analysis of variance (ANOVA), and post hoc Tukey's test. Results: At 24 hours, SBS of all surface pre-treatment groups were comparable with the control group, with significant differences found between EDC and SA groups only (p = 0.009). After 6 months storage, EDC, EGCG, and MI pre-treatments preserved the resindentin bond strength with no significant fall. Conclusions: Dentin pre-treatment with all the dentin biomodifiers except SA resulted in significant preservation of resin-dentin bond over 6 months storage period, without negatively affecting the immediate bond strength of the etch and rinse adhesive tested.