Glomerular C4d Deposition Indicates in situ Classic Complement Pathway Activation, but is not a Marker for Lupus Nephritis Activity

SeHoonKim,HyeonJooJeong 연세대학교의과대학 2003 Yonsei medical journal Vol.44 No.1

Basal Cell Carcinoma with Matrical Differentiation

SeHoonKim,Min-GeolLee,KwangGilLee 연세대학교의과대학 2003 Yonsei medical journal Vol.44 No.3

Liposarcoma with Meningothelial-like Whorls. Report of Four Cases Showing Diverse Histologic Findings and Behavior

SeHoonKim,YoonJungChoi,HeeJungKim,Woo-IckYang 연세대학교의과대학 2003 Yonsei medical journal Vol.44 No.3

Bit Error Rate Measurement of an RSFQ Toggle Flip-Flop

Sehoon Kim,Jinyoung Kim,강준희 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.48 No.5I

The problem of fluctuation-induced digital bit errors in a rapid single flux quantum (RSFQ) circuit has been a very important issue. In this work, we measured the bit error rate of an RSFQ toggle Flip-flop (T-FF) that was designed to use in a programmable counter. An RSFQ T-FF should have a very low error rate at optimal bias, and the theoretical estimates of the RSFQ error rate are on the order of 10.40 per bit operation. In this experiment, we prepared two identical circuits in parallel. Each circuit was composed of 10 Josephson transmission lines (JTLs) connected in series with an RSFQ T-FF placed in the middle of the 10 JTLs. We used a splitter to feed the same input signal to both circuits. The outputs of the two circuits were compared with that of an RSFQ exclusive OR (XOR) to measure the bit error rate of the RSFQ T-FF. By using a computerized bit error rate test setup, we measured a bit error rate of 8.46 × 10.13 when the bias current to the RSFQ T-FF was 0.37 mA, quite off from the optimum bias current of 0.47 mA. We also measured a bit error rate of 3.05 × 10.12 when the bias current to the RSFQ T-FF was 0.57 mA, quite off from the optimum bias current of 0.47 mA. The problem of fluctuation-induced digital bit errors in a rapid single flux quantum (RSFQ) circuit has been a very important issue. In this work, we measured the bit error rate of an RSFQ toggle Flip-flop (T-FF) that was designed to use in a programmable counter. An RSFQ T-FF should have a very low error rate at optimal bias, and the theoretical estimates of the RSFQ error rate are on the order of 10.40 per bit operation. In this experiment, we prepared two identical circuits in parallel. Each circuit was composed of 10 Josephson transmission lines (JTLs) connected in series with an RSFQ T-FF placed in the middle of the 10 JTLs. We used a splitter to feed the same input signal to both circuits. The outputs of the two circuits were compared with that of an RSFQ exclusive OR (XOR) to measure the bit error rate of the RSFQ T-FF. By using a computerized bit error rate test setup, we measured a bit error rate of 8.46 × 10.13 when the bias current to the RSFQ T-FF was 0.37 mA, quite off from the optimum bias current of 0.47 mA. We also measured a bit error rate of 3.05 × 10.12 when the bias current to the RSFQ T-FF was 0.57 mA, quite off from the optimum bias current of 0.47 mA.

Relaxant Effect of 4-Aminopyridine on the Mesenteric Artery of Rat

Se-Hoon Kim,Tae-Im Lee 대한생리학회-대한약리학회 2000 The Korean Journal of Physiology & Pharmacology Vol.4 No.6

<P> It has been well known that 4-aminopyridine (4-AP) has an excitatory effect on vascular smooth muscle due to causing membrane depolarization by blocking K<SUP>⁢</SUP>-channel. However, we observed that 4-AP had an inhibitory effect on the mesenteric artery of rat. Therefore, we investigated the mechanism of 4-AP-induced vasorelaxation. The mesenteric arcuate artery and its branches were isolated and cut into ring. The ring segment was immersed in HEPES-buffered solution and its isometric tension was measured. 4-AP (0.1∼10 mM) induced a concentration-dependent relaxation, which was unaffected by NO synthase inhibitor, N<SUP>G</SUP>-nitro-L-arginine methylester (100μM) or soluble guanylate cyclase inhibitor, methylene blue (10μM). Glibenclamide (10μM), ATP-sensitive K<SUP>⁢</SUP> channel blocker, did not exert any effect on the 4-AP-induced vasorelaxation. 4-AP relaxed the sustained contraction induced by 100 mM K<SUP>⁢</SUP> or Ca<SUP>2⁢</SUP> ionophore, A23187 (10μM) in a dose-dependent manner. In addition, 4-AP significantly decreased the phasic contractile response to norepinephrine in the absence of extracellular Ca<SUP>2⁢</SUP>. However, 4-AP did not block the <SUP>45</SUP>Ca influx of rat aorta. From the above results, we suggest that 4-AP may not block the Ca<SUP>2⁢</SUP> influx through Ca<SUP>2⁢</SUP>-channel, but act as a nonspecific vasorelaxant in arterial smooth muscle.

ESG Lending

Sehoon Kim,Nitish Kumar,Jongsub Lee,Junho Oh 한국재무학회 2021 한국재무학회 학술대회 Vol.2021 No.11

The \ESG lending" market, where loan contract terms are contingent on borrower ESG performance (i.e., ESG-linked loans), or where loans are issued for specic green projects (i.e., Green loans), has grown exponentially from $6 billion in 2016 to $173 billion in 2019. Much of this growth is driven by ESG-linked loans which are widespread across various industries and well developed capital markets, especially in civil law countries. ESG-linked loans are issued in sizeable amounts by large and publicly listed borrowers, and are often structured through revolving credit facilities by large groups of syndicates led by reputable \ESG specialist" global banks, who keep tight relationships with borrowers. Green loans are smaller project nance vehicles, similar in format to green bonds, yet issued to mostly privately held borrowers. They do not tend to attract large cross-border syndicates. We nd that ESG loans tend to be written by borrowers and lenders with superior ESG proles ex-ante, and nd no evidence that their ESG performances deteriorate ex-post after ESG loan issuance. Overall, our results indicate that borrowers capable of maintaining high ESG standards and lenders capable of coordinating and monitoring ESG loan contracts drive the emergence of ESG banking activities around the globe.

Effect of pH on the ATP-sensitive K<SUP>⁢</SUP> Channel in Aortic Smooth Muscle Cells from Rats

Se Hoon Kim,Il Su Kim,Hoe Suk Kim,Byeong Hwa Jeon,Seok Jong Chang 대한생리학회-대한약리학회 1997 The Korean Journal of Physiology & Pharmacology Vol.1 No.5

<P> The effects of pH on K<SUP>⁢</SUP> currents were investigated in single smooth muscle cells isolated from the thoracic aorta of Wistar-Kyoto rats. Whole-cell K<SUP>⁢</SUP> currents were recorded in the conventional configuration of the voltage-clamp technique. Pinacidil (10uM) activated the whole-cell current and the pinacidil-activated current was completely inhibited by glibenclamide (10uM) , an inhibitor of ATP-sensitive K<SUP>⁢</SUP> channel (K<SUB>ATP</SUB> channel). Pinacidil-activated current was reversed at near the K<SUP>⁢</SUP> equilibrium potential. This current was time- and voltage-independent and reduced by elevating intracellular ATP. Pinacidil-activated current was reduced by lowering the external pH. However, alteration of internal pH has controversial effects on pinacidil-activated current. When the single cell was dialyzed with 0.1 mM ATP, alteration of internal pH had no effect on pinacidil-activated K<SUP>⁢</SUP> current. In the contrast, when the single cell was dialyzed with 3 mM ATP, pinacidil-activated current was increased by lowering internal pH. Our results suggest that K<SUP>⁢</SUP> channel activated by pinacidil may be K<SUB>ATP</SUB> channel and internal H<SUP>⁢</SUP> may reduce the inhibitory effect of ATP on K<SUB>ATP</SUB> channel.

The analysis of macrobenthic community and organic pollution in intertidal zone of Hwangdo in Cheonsu Bay, Korea

Se-Hoon Kim,Seon-Kyu Kim,Jian liang,Gun-Hee Kim,Ji-Hyun Kim,Chae-Woo Ma 한국수산과학회 양식분과 2022 한국수산과학회 양식분과 학술대회 Vol.2022 No.10

Modeling and Performance Analysis of Address Allocation Schemes for Mobile <i>Ad Hoc</i> Networks

Sehoon Kim,Jinkyu Lee,Ikjun Yeom IEEE 2008 IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY Vol.57 No.1

<P>Address allocation is an essential part in maintaining a mobile ad hoc network (MANET) effectively, and several address allocation schemes have been proposed. In this paper, we present a set of analytical models to evaluate the efficiency of address allocation schemes. The derived models quantitatively characterize the efficiency of four popular address allocation schemes in terms of latency and communication overhead. Through the analysis, we achieve numerical results that show the impact of network parameters on the efficiency of these schemes. We also conduct simulations and compare with analytical results to validate our models. The analytical model developed in this paper is able to more accurately predict the performance of address allocation schemes over a various range of loss rates and would be useful in providing more insights for the study of an efficient address allocation scheme in MANETs. To our understanding, this is the first attempt in mathematically investigating the performance of addressing schemes in ad hoc networks.</P>

Influence of surface roughness on the efficiency of a flexible organic solar cell

Se Hoon Kim,Deuk Yong Lee,Young-Jei Oh 한양대학교 세라믹연구소 2020 Journal of Ceramic Processing Research Vol.21 No.1

Organic solar cells (OSCs) without an over-coating layer, consisting of a silver nanowire (AgNW) transparent electrode, apoly(3,4-ethylenedioxythiphene):poly (styrenesulfonate) (PEDOT:PSS) layer, a poly(3-hexylthiophene-2,5-diyl):the [6,6]-phenylC61 butyric acid methyl ester (P3HT:PCBM) active layer, a LiF/Al electron collecting, and a top electrode, were successfullyfabricated in order to investigate the effect of surface roughness on the efficiency of OSCs. The AgNW transparent electrodeon acryl resin coated polyethylene terephthalate (PET) film was prepared through the filtration/transfer method. Sheetresistance of 30 Ω-1 and surface roughness of 10.5 nm were detected. After coating the PEDOT:PSS hole transfer layer andthe P3HT:PCBM active layer at 1000 rpm on the AgNW/PET transparent electrode, the surface roughness was reduceddramatically. However, open circuit voltage, short circuit current density, fill factor, and power conversion efficiency decreasedas the coating speed was raised during the formation of the PEDOT:PSS layer and the P3HT:PCBM active layer due to thedeterioration of the surface roughness. The surface roughness was determined to be crucial for the output performance ofOSCs.