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A fast and simple system performance emulator for enhanced solid state disks:a case study of long read operations

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Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第6期11卷 418-424页

作者： Do Yeun kim Chanik PARK Eui-Young chung Sung Woo chung Division of Computer and Communication Engineering Korea University Seoul 13-713 Korea Samsung Electronics Yongin-City Kyunggi-Do 446-701 Korea School of Electrical and Electronic Engineering Yonsei University Seoul 120-749 Korea

In this paper, we propose a fast and simple system emulator, called a system performance emulator(SPE), to evaluate long read *** SPE estimates how much system-wide performance is enhanced by using a faster solid state disk(SSD).By suspending a CPU for a certain time during direct memory access(DMA) transfer and subtracting this suspended time from the total DMA time, the SPE estimates the improvement in system performance expected from an enhanced SSD prior to its *** also examine the relation between storage performance and system performance using the SPE.

关键词： Solid state disk(SSD) Performance emulator System performance Direct memory access(DMA) Operating system

Fabrication and Characterization of Electrodeposited Ni-SiC-h/BN Composite Coatings

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Journal of Materials Science & Technology 2014年第8期30卷 796-802页

作者： Gobinda Gyawali Hyung-Suk kim Khagendra Tripathi Tae-Ho kim soo Wohn Lee Research Center for Eco-Multifunctional Nano Materials Sun Moon UniversityAsanRepublic of Korea Department of Environmental Engineering Sun Moon UniversityChungnam 336-708Republic of Korea

Ni—SiC—h/BN composite materials were prepared by electrodeposition technique with the dispersion of SiC（10 g/L） and h/BN nanosheets（10 g/L） in a nickel sulfamate electrolytic *** ratio of sodium dodecyl sulfate（SDS） and cetyltrymethyl ammonium bromide（CTAB） surfactants were used to evaluate the effect of surfactants on the properties of the electrodeposited composite *** coating samples were characterized by scanning electron microscopy,X-ray diffraction,Vickers microhardness test,scratch and tribology *** results revealed that the co-deposition of nanoparticles was significantly influenced by surfactants during electrodeposition *** or polyhedral nickel crystallites were observed at higher ratio of SDS/CTAB while smaller oval grains with refined surface morphologies were obtained at lower ratio of SDS/CTAB *** addition,wt%of particles co-deposition was increased,and Vickers microhardness,wear and coefficient of friction of the electrodeposited composite coatings were improved at increased CTAB and decreased SDS contents in the electrolyte during electrodeposition process.

关键词： Ni-SiC-h/BN Composite coating Surfactant Microstructure Scratch Wear

Stabilizing lithium deposition within bimodal porous SiO_(2)-TiO_(2) microspheres as 3D host structure

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Nano Research 2024年第11期17卷 10179-10188页

作者： Noeul kim Jae Hun Choi Min kim Dae soo Jung Yun Chan Kang Department of Materials Science and Engineering Korea University Anam-Dong Seongbuk-Gu Seoul 136-713 Republic of Korea Energy Storage Materials Center Korea Institute of Ceramic Engineering and Technology Soho-ro Jinju-si Gyeongnam-do 52851 Republic of Korea

Three-dimensional (3D) host materials for lithium metal anodes (LMAs) have gained attention because they can mitigate volume expansion and local current density through their large surface area and suppress the dendritic growth of lithium. Recent research on 3D host materials has focused on conductive materials;however, the benefits of 3D host materials cannot be fully utilized because lithium deposition begins at the top of the structure. Herein, we fabricate SiO_(2)-TiO_(2) composite microspheres with bimodal pore structures (bi-SiTiO) by simple spray pyrolysis. These microspheres effectively store lithium within the structure from the bottom of the electrode while preventing lithium dendrite formation. Focused ion beam-scanning transmission electron microscopy (FIB-STEM) analysis reveals that the lithiophilic properties of composite microspheres enhanced their effectiveness in storing lithium, with small pores acting as “lithium-ion sieves” for a uniform lithium-ion flux and large pores that provide sufficient volume for lithium deposition. The bi-SiTiO composite microspheres exhibit a high Coulombic efficiency of 98.5% over 200 cycles at 2.0 mA·cm^(−2) when operated in a lithium half-cell. With a high lithium loading of 5.0 mAh·cm^(−2), the symmetrical cell of the bi-SiTiO electrode sustains more than 900 h. A full cell coupled with an LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2) (NCM811) cathode also exhibits enhanced electrochemical properties in terms of cycling stability and rate capability.

关键词： lithium metal battery spray pyrolysis three-dimensional(3D)host materials bimodal pore structure lithiophilic materials

Vitisin B inhibits influenza A virus replication by multi-targeting neuraminidase and virusinduced oxidative stress

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Acta Pharmaceutica Sinica B 2023年第1期13卷 174-191页

作者： Eun-Bin Kwon Wei Li Young soo kim Buyun kim Hwan-Suck chung Younghoon Go Hyun-Jeong Ko Jae-Hyoung Song Young Ho kim Chun Whan Choi Jang-Gi Choi Korean Medicine(KM)Application Center Korea Institute of Oriental MedicineDaegu 41062Republic of Korea College of Pharmacy Chungnam National UniversityDaejeon 34134Republic of Korea Natural Product Research Team BiocenterGyeonggido Business and Science AcceleratorGyeonggi-Do 16229Republic of Korea Laboratory of Microbiology and Immunology College of PharmacyKangwon National UniversityChuncheon 24341Republic of Korea

The development of drug-resistant influenza and new pathogenic virus strains underscores the need for antiviral ***,neuraminidase(NA)inhibitors are commonly used antiviral drugs approved by the US Food and Drug Administration(FDA)for the prevention and treatment of ***,we show that vitisin B(VB)inhibits NA activity and suppresses H1N1 viral replication in MDCK and A549 *** oxygen species(ROS),which frequently occur during viral infection,increase virus replication by activating the NF-κB signaling pathway,downmodulating glucose-6-phosphate dehydrogenase(G6PD)expression,and decreasing the expression of nuclear factor erythroid2-related factor 2(Nrf2)antioxidant response *** decreased virus-induced ROS generation by increasing G6PD expression and Nrf2 activity,and inhibiting NF-κB translocation to the nucleus through IKK *** addition,VB reduced body weight loss,increased survival,decreased viral replication and the inflammatory response in the lungs of influenza A virus(IAV)-infected *** together,our results indicate that VB is a promising therapeutic candidate against IAV infection,complements existing drug limitations targeting viral *** modulated the intracellular ROS by G6PD,Nrf2 antioxidant response pathway,and NF-κB signaling *** results demonstrate the feasibility of a multi-targeting drug strategy,providing new approaches for drug discovery against IAV infection.

关键词： Influenza Vitisin B Vitis vinifera L. Neuraminidase Reactive oxygen species NF-κB Multi-targeting Nrf2 G6PD

Effect of Solute Contents of Al-Ni-Sr Alloy on Glass Forming Ability and Thermal Stability

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Journal of Rare Earths 2004年第Z2期22卷 73-77页

作者： Taek soo kim J K Lee H J kim J C Bae Advanced Materials R&D Center Korea Institute of Industrial Technology994-32 Dongchun-dongYeonsu-kuIncheon 406-130Korea Advanced Materials R&D CenterKorea Institute of Industrial Technology994-32 Dongchun-dongYeonsu-kuIncheon 406-130Korea Advanced Materials R&D CenterKorea Institute of Industrial Technology994-32 Dongchun-dongYeonsu-kuIncheon 406-130Korea Advanced Materials R&D CenterKorea Institute of Industrial Technology994-32 Dongchun-dongYeonsu-kuIncheon 406-130Korea

Glass forming ability (GFA) and structural characterization of a new amorphous Al-Ni-Sr alloy melt spun were investigated on the theory of the factors for the glass formation. The GFA was varied with the ratio of Ni to Sr in detail and successful amorphous phase dispersed with 2 ～ 5 nm precipitates was prepared from Al-Ni5-Sr3. Thermal stability and crystallization behavior of the amorphous phase were determined by continuous and isothermal heating technique on DCS, resulting that the crystallization occurs by the growth of fcc Al nanocrystals on the preexistent nuclei.

关键词： glass formation crystallization Al base amorphous alloys rapid solidification

Comparison of contrast sensitivity based on the surgical results for intermittent exotropia

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International Journal of Ophthalmology(English edition) 2019年第11期12卷 1725-1730页

作者： Hae Rang kim soo Jung Lee Department of Ophthalmology Haeundae Paik Hospital Inje University College of Medicine

AIM: To compare contrast sensitivity(CS) based on the surgical results for intermittent exotropia(IXT) and to examine the relationship between CS and ***: Medical records of the patients who underwent bilateral lateral rectus muscle recession for IXT between 4 and 12 years old were reviewed retrospectively. They were categorized based on the surgical results;successful correction group(n=36) and overcorrection group(esotropia ≥10 PD at 3 mo postoperatively, n=18). Using CGT-2000 test for CS was performed binocularly, and subjective reports of photophobia was investigated preoperatively and at 3 mo postoperatively. Objective photophobia was defined as a significant decrease in CS in the presence of ***: Preoperatively, there was no difference in CS between the groups. Postoperatively, under mesopic conditions, significant improvement of CS was observed at 6.3°, 4°, and 2.5° in the successful correction group and at 6.3° and 4° in the overcorrection group, regardless of glare. Under photopic conditions, at all visual angles except 0.64°, improvement in CS was noted in both groups while CS worsened significantly at 0.64° in the overcorrection group postoperatively. At all visual angles under photopic conditions postoperatively, regardless of glare, CS in the overcorrected group was significantly worse than that in the successful correction group, and CS was significantly decreased by addition of glare in both groups. All patients except one(96.4%) in the successful correction group and 8 patients(61.5%) in overcorrection group showed improvement of photophobia postoperatively, which correlated with CS under photopic conditions(P=0.001, 0.03).CONCLUSION: After surgery for IXT, CS under photopic conditions improve at all visual angles except 0.64°, while CS is significantly worse in the overcorrection group postoperatively at 0.64°. Subjective photophobia havesignificant correlation with CS under photopic conditions, and may be used as an object

关键词： contrast sensitivity intermittent exotropia overcorrection photophobia success

In vitro fungistatic activity of 36 traditional oriental medicines and their synergistic effect against Trichophyton rubrume

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Asian Pacific Journal of Tropical Medicine 2018年第2期11卷 109-115页

作者： Young soo kim Jin Yeul Ma Korean Medicine Application Center Korea Institute of Oriental Medicine

Objective: To investigate the fungistatic activity and synergistic effects of natural products and their constituents, including traditional oriental medicines(TOMs).Methods: Fungistatic activities of TOMs prepared by hot-water(115 ℃) or ethanol(70%; 40 ℃) extraction were determined by their minimum inhibitory *** assess possible synergistic effects, minimum inhibitory concentrations of various combinations were ***: By evaluating antifungal susceptibility of Trichophyton rubrum, which is a major causative fungus for several types of dermatophytosis, we confirmed that ethanol extracts were more active than hot-water extracts in 25 of the 36 TOMs, suggesting that the constituents with high hydrophobicity tend to contribute significantly to fungistatic *** selected four TOMs with high fungistatic activity, including Aucklandiae radix, Gentianae macrophyllae radix, Scutellariae radix, and Galla rhois, and their synergistic effects were investigated through the combination studies between TOMs or TOM-conventional drug *** combinations between four TOMs, partial synergistic effects were observed in Aucklandiae radix–Galla rhois and Gentianae macrophyllae radix–Galla rhois combinations, as supported by the lowest fractional inhibitory concentration index value of 0.66 for both ***, Galla rhois showed the strongest synergistic effect on growth inhibition of Trichophyton rubrumwith a fractional inhibitory concentration index value of 0.50 in combination with ***: Our findings indicate that the combination of TOMs and TOM-terbinafine may be effective on treatment for chronic and recurrent dermatophytosis by improving fungistatic activity and led to decrease systemic toxicity in clinical practice.

关键词： Fungistatic activity Hot-water and ethanol extracts Traditional oriental medicine Tinea Trichophyton rubrum Synergistic effect

User Interface-Based Repeated Sequence Detection Method for Authentication

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Intelligent Automation & Soft Computing 2023年第3期35卷 2573-2588页

作者： Shin Jin Kang soo Kyun kim School of Games Hongik UniversitySejong30016Korea Department of Computer Engineering Jeju National UniversityJeju63243Korea

In this paper,we propose an authentication method that use mouse and keystroke dynamics to enhance online privacy and *** proposed method identiﬁes personalized repeated user interface(UI)sequences by analyzing mouse and keyboard *** this end,an Apriori algorithm based on the keystroke-level model(KLM)of the human–computer interface domain was *** proposed system can detect repeated UI sequences based on KLM for authentication in the *** effectiveness of the proposed method is veriﬁed through access test-ing using commercial applications that require intensive UI *** results show using our cognitive mouse-and-keystroke dynamics system can com-plement authentication at the application level.

关键词： Authentication keystroke-level model(KLM) keystroke mouse dynamics

A GIS-Based Framework for Real-Time Debris-Flow Hazard Assessment for Expressways in Korea

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International Journal of Disaster Risk Science 2016年第3期7卷 293-311页

作者： Han-Saem kim Choong-Ki chung Sang-Rae kim Kyung-Suk kim Earthquake Research Center Korea Institute of Geoscience and Mineral Resources Department of Civil and Environmental Engineering Seoul National University Department of Civil and Environmental Engineering Northwestern University Expressway and Transportation Research Institute Korea Expressway Corporation

Debris flows caused by heavy rainfall in mountain areas near expressways lead to severe social and economic losses and sometimes result in ***, the development of a real-time system for debris-flow hazard assessment is necessary to provide preliminary information for rapid decision making about evacuations or restoration measures, as well as to prevent secondary disasters caused by debris flows. Recently,various map-based approaches have been proposed using multi-attribute criteria and assessment methods for debrisflow susceptibilities. For the macrozonation of debris-flow hazard at a national scale, a simplified method such as the Korea Expressway Corporation(KEC) debris-flow hazard assessment method can be applied for systematic analysis based on geographic information systems(GIS) and monitoring networks. In this study, a GIS-based framework of real-time debris-flow hazard assessment for expressway sections is proposed based on the KEC debris-flow hazard assessment method. First, the KEC-based method was standardized in a systematic fashion using Arc GIS,enabling the objective and quantitative acquisition of various attribute datasets. The quantification of rainfall criteria also was considered. A safety management system for debris-flow hazard was developed based on the GIS platform. Finally, the method was applied and verified on three expressway sections in Korea. The grading standard for each individual influencing attribute was subsequently modified to more accurately assess the debris-flow hazards.

关键词： Debris-flow hazard Expressway management GIS Korea Real-time hazard assessment