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Search Results: 1 - 10 of 2793 matches for " Jae Rhee "
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Business Cycle Implication of Exchange Rate-Based Stabilization
Hyuk Jae Rhee
International Journal of Economics and Finance , 2010, DOI: 10.5539/ijef.v2n2p12
Abstract: The purpose of this study is to analyze the business cycle associated with the exchange rate-based inflation stabilization policy. We develop a stochastic dynamic general equilibrium small open economy model characterized by two sectors of economic activities (tradable and non-tradable), imperfect competition and sticky price in the non-tradable sector, a cash in advance constraint for consumption goods, and endogenous labour supply. The model is calibrated and solved numerically to examine the resulting equilibrium dynamics. Result shows that the model can replicate quantitatively the stylized facts of the credible exchange rate-based stabilization programs, the slow convergence of the inflation to the target rate and the sustained expansion of domestic sector. The model can also produce the “boom-recession cycle” and inflation persistence in the case of temporary stabilizations.
A racemic formal total synthesis of clavukerin A using gold(I)-catalyzed cycloisomerization of 3-methoxy-1,6-enynes as the key strategy
Jae Youp Cheong,Young Ho Rhee
Beilstein Journal of Organic Chemistry , 2011, DOI: 10.3762/bjoc.7.84
Abstract: An efficient formal total synthesis of (±)-clavukerin A was accomplished via a gold-catalyzed cycloisomerization of a 3-methoxy-1,6-enyne 5 as the key strategy followed by Rh-catalyzed stereoselective hydrogenation of the cycloheptenone 4.
Magnetic states of iron-based superconducting compounds calculated by using GGA$+U$ method with negative \emph{U}
Jae Kyung Jang,Joo Yull Rhee
Physics , 2014,
Abstract: The magnetic moments per Fe atom in high-$T{_\textrm{c}}$ iron-based superconducting compounds, BaFe$_{2}$As$_{2}$ and LaFeAsO obtained from the first-principles calculation with local-spin-density approximation are much larger than those obtained from experiments. To resolve the contradictory results between theory and experiment we employed the so-called LDA$+ U$ (or more exactly GGA$+ U$) technique with negative \emph{U} in the first-principles calculation. The calculated values with negative \emph{U}, $- 0.09$ Ry and $- 0.10$ Ry for BaFe$_{2}$As$_{2}$ and LaFeAsO, respectively, are in excellent agreement with the experimental ones. By comparing the differences in \emph{d}-orbital occupation numbers and spin densities calculated by using a simple GGA and GGA$+ U$ with negative $U$, the magnetic moments of the two compounds are found to be similar to the case of low-spin state of metamagnetic Fe$_{3}$Al alloy.
Thermal Conductivity Measurement of Zr-ZrO2 Simulated Inert Matrix Nuclear Fuel Pellet  [PDF]
Dong-Joo Kim, Young Woo Rhee, Jong Hun Kim, Jang Soo Oh, Keon Sik Kim, Jae Ho Yang
World Journal of Nuclear Science and Technology (WJNST) , 2013, DOI: 10.4236/wjnst.2013.32008

For an evaluation of a thermal conductivity of Zr + 30 vol% ZrO2 simulated inert matrix nuclear fuel pellet, a simulated fuel pellet was fabricated using a hot-pressing method at 800°C in a vacuum and at a 20 MPa load. And several thermophysical properties of the simulated inert matrix fuel pellet were measured and calculated. The thermal diffusivity and linear thermal expansion as a function of temperature of the simulated fuel pellet were measured using a laser flash method and a dilatometry, respectively. Finally, based on the experimental data, the thermal conductivity of the simulated inert matrix fuel pellet was calculated and evaluated.

BAY 11-7082 Is a Broad-Spectrum Inhibitor with Anti-Inflammatory Activity against Multiple Targets
Jaehwi Lee,Man Hee Rhee,Eunji Kim,Jae Youl Cho
Mediators of Inflammation , 2012, DOI: 10.1155/2012/416036
Abstract: BAY 11-7082 (BAY) is an inhibitor of κB kinase (IKK) that has pharmacological activities that include anticancer, neuroprotective, and anti-inflammatory effects. In this study, BAY-pharmacological target pathways were further characterized to determine how this compound simultaneously suppresses various responses. Primary and cancerous (RAW264.7 cells) macrophages were activated by lipopolysaccharide, a ligand of toll-like receptor 4. As reported previously, BAY strongly suppressed the production of nitric oxide, prostaglandin E2, and tumor necrosis factor-α and reduced the translocation of p65, major subunit of nuclear factor-κB, and its upstream signaling events such as phosphorylation of IκBα, IKK, and Akt. In addition, BAY also suppressed the translocation and activation of activator protein-1, interferon regulatory factor-3, and signal transducer and activator of transcription-1 by inhibiting the phosphorylation or activation of extracellular signal-related kinase, p38, TANK-binding protein, and Janus kinase-2. These data strongly suggest that BAY is an inhibitor with multiple targets and could serve as a lead compound in developing strong anti-inflammatory drugs with multiple targets in inflammatory responses.
Clock/Frequency Generation Circuits and Systems
Woogeun Rhee,Antonio Liscidini,Jae-Yoon Sim,Kenichi Okada
Journal of Electrical and Computer Engineering , 2012, DOI: 10.1155/2012/941653
A Web Clustered System for Achieving Higher Performances through Load Balancing Mechanism  [PDF]
Young Rhee
American Journal of Industrial and Business Management (AJIBM) , 2013, DOI: 10.4236/ajibm.2013.33041

In this paper, we study a methodology of distributing client requests in the LVS cluster system. The basic WLC algorithm is studied intensively. A load distributing algorithm which assigns its weight into each real server is devised by considering the state of the network resources on real servers. Network simulation is executed to estimate balanced usage of the resource using web load generating software. In order to analyze the dynamics of server performance due to the workload, we model a system software to evaluate the level of load balancing in the LVS, and perform actual experiments using web agenda. It is shown that the correction potentiality of the suggested algorithm is somewhat better than the WLC algorithm in terms of balanced resources usage.

A Study on the Balanced Assignment of Allocating Large Group with Multiple Attributes into Subgroups  [PDF]
Young Rhee
American Journal of Industrial and Business Management (AJIBM) , 2018, DOI: 10.4236/ajibm.2018.86095
Abstract: In this paper, a balanced assignment methodology is proposed in case of entity with more than 2 attributes. The Mahalanobis distance is a basic idea of MTS method as a distance indicator considering the correlation of entities in quality control techniques. This can be applied to ensure the balanced assignment, and utilized the Signal to Noise Ratio as a measure of classifying large groups with entities into many subgroups. In order to analyze the balanced assignment, the simulation is performed for a given example. Validations against simulation data establish the effectiveness of this approach.
Dual Roles of Quercetin in Platelets: Phosphoinositide-3-Kinase and MAP Kinases Inhibition, and cAMP-Dependent Vasodilator-Stimulated Phosphoprotein Stimulation
Won Jun Oh,Mehari Endale,Seung-Chun Park,Jae Youl Cho,Man Hee Rhee
Evidence-Based Complementary and Alternative Medicine , 2012, DOI: 10.1155/2012/485262
Abstract: Background. Progressive diseases including cancer, metabolic, and cardiovascular disorders are marked by platelet activation and chronic inflammation. Studies suggest that dietary flavonoids such as quercetin possess antioxidant, anti-inflammatory, and antiplatelet properties, which could prevent various chronic diseases including atherosclerosis and thrombosis. However, the mechanism and the signaling pathway that links quercetin's antiplatelet activity with its anti-inflammatory property is limited and thus further exploration is required. The aim of this paper was to examine the link between antiplatelet and anti-inflammatory roles of quercetin in agonist-induced platelet activation. Methods. Quercetin effects on agonist-activated platelet-aggregation, granule-secretion, , and glycoprotein-IIb/IIIa activation were examined. Its effects on PI3K/Akt, VASP, and MAPK phosphorylations were also studied on collaged-activated platelets. Results. Quercetin dose dependently suppressed collagen, thrombin, or ADP-induced platelet aggregation. It significantly inhibited collagen-induced ATP release, P-selectin expression, mobilization, integrin- activation, and augmented cAMP and VASP levels. Moreover, quercetin attenuated PI3K, Akt, ERK2, JNK1, and p38 MAPK activations, which were supported by platelet-aggregation inhibition with the respective kinase inhibitors. Conclusion. Quercetin-mediated antiplatelet activity involves PI3K/Akt inactivation, cAMP elevation, and VASP stimulation that, in turn, suppresses MAPK phosphorylations. This result suggests quercetin may have a potential to treat cardiovascular diseases involving aberrant platelet activation and inflammation. 1. Introduction Platelets play a major role in hemostasis and thrombosis [1], in which the latter causes a serious problem leading to myocardial infarction, atherosclerosis, ischemia, and stroke [2]. At the sites of vascular damage, platelet activation by agonists such as collagen, adenosine diphosphate (ADP), and thrombin resulted in an increase in concentration, platelet shape change, secretion, and aggregation [3]. Activated platelets also release various aggregation mediators including ADP, adenosine triphosphate (ATP), thromboxane A2 (TXA2), serotonin, and various proteins [4]. These released mediators stimulate G-protein coupled receptors (GPCRs) that are necessary for phospholipase C (PLC), protein kinase C (PKC), phosphoinositide-3 kinase (PI3K) [4], and MAP kinases activations [5]. Furthermore, activated platelets secret P-selectin, which stabilizes the initial integrin-fibrinogen
Clock/Frequency Generation Circuits and Systems
Woogeun Rhee,Antonio Liscidini,Jae-Yoon Sim,Kenichi Okada,Sudhakar Pamarti
Journal of Electrical and Computer Engineering , 2012, DOI: 10.1155/2012/941653
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