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37 results on '"Cheolho Kim"'

1. A numerical study of added resistance performance and hydrodynamics of KCS hull in oblique regular waves and estimation of resistance in short-crested irregular waves through spectral method

Author

Soon-Hyun Lee, Cheolho Kim, Kwang-Jun Paik, Hyeongjun Kim, and Jangho Chun

Subjects
Oblique wave, Quartering sea condition, Unsteady Reynolds averaged Navier-Stokes (URANS), Regular wave, Irregular wave, Short-crested irregular wave, Ocean engineering, TC1501-1800, Naval architecture. Shipbuilding. Marine engineering, VM1-989
Abstract

Research on multidirectional waves is increasing as studies on added resistance advance. In this study, the added resistance of the multidirectional regular waves of the KCS hull was estimated by numerical analysis. The direction of the grid was changed according to the heading angle to consider waves in multiple directions. In addition, the method in which the entire domain moved along the movement of the hull was used without using the overset method to minimize the numerical errors. The added resistance and motion RAOs for each angle and the flow characteristics were compared to support the results. For fluid dynamics, time-averaged stern dynamics pressure, boundary layer, and nominal wake for each heading angle were compared, and differences compared to calm water were also reviewed. Based on the bow quartering sea condition analysis results, the added resistance in long-crested and short-crested irregular wave conditions was estimated using the spectral method. The JONSWAP spectrum was used as the target wave spectrum, and the cos-power type was considered the directional spreading function.

Published
2024
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2. Estimation of the manoeuvrability of the KVLCC2 in calm water using free running simulation based on CFD

Author

In-Tae Kim, Cheolho Kim, Sang-Hyun Kim, Donghyeong Ko, Seong-Ho Moon, Hwanghi Park, Jaewoong Kwon, and Bongyong Jin

Subjects
Manoeuvrability, Computational fluid dynamics, Virtual disk, Calm water, Manoeuvring test, Ocean engineering, TC1501-1800, Naval architecture. Shipbuilding. Marine engineering, VM1-989
Abstract

There are three different well-known methods for predicting the manoeuvrability of ships: (1) free running model test, (2) direct manoeuvring simulation using CFD and (3) system-based manoeuvring simulation. In this paper, the manoeuvrability of the KVLCC2 was estimated using CFD with rigid body motion and body force propeller method. The free running manoeuvre at the different time steps were also simulated. The yaw checking ability and the turning ability of KVLCC2 were predicted using CFD and could have been confirmed that the IMO criteria was satisfied. When the results were compared with the model test and system-based method, the free running simulation showed better agreement to that of the model test. It could also be confirmed that the results vary depending on the time step. Overall, the CFD results using the body force propeller method estimated most accurately the test results.

Published
2021
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3. NUMERICAL SIMULATIONS OF ADDED RESISTANCE IN REGULAR HEAD WAVES ON A CONTAINER SHIP

Author

Young-Gill Lee, Jeong-Ho Park, Hyeongjun Kim, Insu Lee, Bongyong Jin, and Cheolho Kim

Subjects
Naval architecture. Shipbuilding. Marine engineering, VM1-989
Abstract

Although shipping was not included in the final text of the Paris Agreement in 2015, IMO (International Maritime Organization) adopted the EEDI (Energy Efficiency Design Index) and the EEOI (Energy Efficiency Operational Indicator) to control climate change and also to reduce gas emission from ships. Accurate prediction of added resistance in waves is essential to evaluate the minimum fuel consumption of a ship in a real sea state. In this paper, the added resistance and motions of a KCS (KRISO Container Ship) with rudder were calculated using a commercial CFD program, STAR-CCM+. Wave forcing was used to generate the waves in the numerical domain, in which no extra wave generation and damping zones were produced. DFBI (Dynamic Fluid Body Interaction) was used for the motions of the KCS with rudder. In this study, five (5) regular head waves from a short wavelength to a long wavelength based on the LPP were considered. Finally, added resistance and the heave and pitch motions of the simulation were compared with experimental data. Simulation and experimental data were in qualitatively and quantitatively good agreement.

Published
2019
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6. Electrochemically active porous carbon nanospheres prepared by inhibition of pyrolytic condensation of polymers

Author

Jaehyun Kim, Dayoung Lee, Cheolho Kim, Haeli Lee, Seungjun Baek, and Jun Hyuk Moon

Subjects
Multidisciplinary
Abstract

Porous carbon is a pivotal material for electrochemical applications. The manufacture of porous carbon has relied on chemical treatments (etching or template) that require processing in all areas of the carbon/carbon precursor. We present a unique approach to preparing porous carbon nanospheres by inhibiting the pyrolytic condensation of polymers. Specifically, the porous carbon nanospheres are obtained by coating a thin film of ZnO on polystyrene spheres. The porosity of the porous carbon nanospheres is controlled by the thickness of the ZnO shell, achieving a BET-specific area of 1,124 m 2 /g with a specific volume of 1.09 cm 3 /g. We confirm that under the support force by the ZnO shell, a hierarchical pore structure in which small mesopores are connected by large mesopores is formed and that the pore-associated sp 3 defects are enriched. These features allow full utilization of the surface area of the carbon pores. The electrochemical capacitive performance of porous carbon nanospheres was evaluated, achieving a high capacitance of 389 F/g at 1 A/g, capacitance retention of 71% at a 20-fold increase in current density, and stability up to 30,000 cycles. In particular, we achieve a specific area-normalized capacitance of 34.6 μF/cm 2 , which overcomes the limitations of conventional carbon materials.

Published
2023

7. Boosting electrochemical methane conversion by oxygen evolution reactions on Fe–N–C single atom catalysts

Author

Cheolho Kim, Heewon Min, Junmin Kim, and Jun Hyuk Moon

Subjects
Nuclear Energy and Engineering, Renewable Energy, Sustainability and the Environment, Environmental Chemistry, Pollution
Abstract

Fe–N–C single atom catalysts (SACs) utilize active oxygen from the oxygen evolution reaction for efficient methane-to-ethanol conversion, achieving an ethanol production rate of 11 480.6 μmol gcat−1 h−1 in flow cell reactions.

Published
2023

9. Estimation of the manoeuvrability of the KVLCC2 in calm water using free running simulation based on CFD

Author

Cheolho Kim, Bongyong Jin, Hwanghi Park, Sang-Hyun Kim, Seong-Ho Moon, Jaewoong Kwon, Donghyeong Ko, and In-Tae Kim

Subjects
Body force, Calm water, business.industry, Naval architecture. Shipbuilding. Marine engineering, Propeller, VM1-989, Ocean Engineering, Computational fluid dynamics, Time step, Rigid body, Manoeuvring test, Control and Systems Engineering, Model test, Manoeuvrability, Virtual disk, business, TC1501-1800, Simulation based, Marine engineering, Mathematics
Abstract

There are three different well-known methods for predicting the manoeuvrability of ships: (1) free running model test, (2) direct manoeuvring simulation using CFD and (3) system-based manoeuvring simulation. In this paper, the manoeuvrability of the KVLCC2 was estimated using CFD with rigid body motion and body force propeller method. The free running manoeuvre at the different time steps were also simulated. The yaw checking ability and the turning ability of KVLCC2 were predicted using CFD and could have been confirmed that the IMO criteria was satisfied. When the results were compared with the model test and system-based method, the free running simulation showed better agreement to that of the model test. It could also be confirmed that the results vary depending on the time step. Overall, the CFD results using the body force propeller method estimated most accurately the test results.

Published
2021

10. Controlled Assembly of Icosahedral Colloidal Clusters for Structural Coloration

Author

Hyerim Hwang, Shin-Hyun Kim, Cheolho Kim, Jun Hyuk Moon, Sanghyuk Park, Vinothan N. Manoharan, Won Bo Lee, Kinam Jung, and Ji Woong Yu

Subjects
endocrine system, Materials science, Icosahedral symmetry, General Chemical Engineering, digestive, oral, and skin physiology, food and beverages, 02 engineering and technology, General Chemistry, Colloidal crystal, 010402 general chemistry, 021001 nanoscience & nanotechnology, Colloidal clusters, complex mixtures, 01 natural sciences, 0104 chemical sciences, body regions, Colloid, Chemical physics, Materials Chemistry, Cluster (physics), 0210 nano-technology, Structural coloration
Abstract

Icosahedral colloidal clusters are a new class of spherical colloidal crystals. This cluster allows for potentially superior optical properties in comparison to conventional onion-like colloidal su...

Published
2020

11. 3D Bicontinuous Structure of a Pseudocapacitive Ultrathin Shell/Carbon Core: A Novel Electrode for Thin-Film Supercapacitors with High Areal Energy Density

Author

Jun Hyuk Moon and Cheolho Kim

Subjects
Supercapacitor, Materials science, Thin layers, Renewable Energy, Sustainability and the Environment, General Chemical Engineering, chemistry.chemical_element, Nanotechnology, 02 engineering and technology, General Chemistry, engineering.material, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Pseudocapacitance, 0104 chemical sciences, chemistry.chemical_compound, Coating, chemistry, Electrode, Polyaniline, engineering, Environmental Chemistry, Thin film, 0210 nano-technology, Carbon
Abstract

Thin-film micro-supercapacitors (MSCs) with high areal capacitance are in great demand due to their wide application in ultra-compact energy storage devices. Carbon electrodes coated with high pseudocapacitance materials have typically been applied, but the increased resistance and pulverization by the pseudocapacitive materials still require improvement. To tackle this issue, we present a 3D bicontinuous structure of the pseudocapacitive shell and carbon core. Specifically, the 3D carbon structure is fabricated using multibeam interference lithography, and conformal thin layers of MnO2 or polyaniline (PANI) are obtained by electrodeposition. This electrode maintains a monolithic carbon conductive structure, even with a pseudocapacitance material coating. The conformal pseudocapacitive shell exhibits low resistance and structural integrity in redox reactions. MnO2– or PANI–carbon electrode MSCs achieve areal capacitance of 4.93 or 26.4 mF cm–2, respectively. The highest areal energy density of 3.67 μW h cm–2 is obtained for the PANI–carbon electrode MSC. This value is superior to the values achieved in recent thin-film MSCs, which demonstrates the advantages of 3D bicontinuous structures.

Published
2020

14. NUMERICAL SIMULATIONS OF ADDED RESISTANCE IN REGULAR HEAD WAVES ON A CONTAINER SHIP

Author

Hyeongjun Kim, Cheolho Kim, Insu Lee, Young-Gill Lee, Jeong-Ho Park, and Bongyong Jin

Subjects
Added resistance, Ship motion, Regular head wave, Computational fluid dynamics, STAR-CCM+, lcsh:VM1-989, Mechanical Engineering, Acoustics, Head (vessel), lcsh:Naval architecture. Shipbuilding. Marine engineering, Ocean Engineering, Star ccm, Container (type theory), Geology
Abstract

Although shipping was not included in the final text of the Paris Agreement in 2015, IMO (International Maritime Organization) adopted the EEDI (Energy Efficiency Design Index) and the EEOI (Energy Efficiency Operational Indicator) to control climate change and also to reduce gas emission from ships. Accurate prediction of added resistance in waves is essential to evaluate the minimum fuel consumption of a ship in a real sea state. In this paper, the added resistance and motions of a KCS (KRISO Container Ship) with rudder were calculated using a commercial CFD program, STAR-CCM+. Wave forcing was used to generate the waves in the numerical domain, in which no extra wave generation and damping zones were produced. DFBI (Dynamic Fluid Body Interaction) was used for the motions of the KCS with rudder. In this study, five (5) regular head waves from a short wavelength to a long wavelength based on the LPP were considered. Finally, added resistance and the heave and pitch motions of the simulation were compared with experimental data. Simulation and experimental data were in qualitatively and quantitatively good agreement.

Published
2019

15. Full lithographic fabrication of boron-doped 3D porous carbon patterns for high volumetric energy density microsupercapacitors

Author

Cheolho Kim, Da-Young Kang, and Jun Hyuk Moon

Subjects
Horizontal scan rate, Fabrication, Plasma etching, Materials science, Renewable Energy, Sustainability and the Environment, business.industry, 02 engineering and technology, Electrolyte, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Capacitance, Pseudocapacitance, 0104 chemical sciences, Electrode, Optoelectronics, General Materials Science, Electrical and Electronic Engineering, 0210 nano-technology, business, Power density
Abstract

Carbon electrodes that are thick and maintain a high volumetric energy density are essential for high energy storage microsupercapacitors (MSCs). Here, fabrication of an electrode based on a boron-doped 3D porous carbon pattern (B-3D-PCP) by lithographic processes is demonstrated. The B-3D-PCP is obtained by carbonization and doping of a polymer pattern fabricated by interference lithography. Then, plasma etching is performed on the B-3D-PCP to obtain an interdigitated electrode, and a polymer electrolyte is applied to complete the MSC. The B-3D-PCP shows remarkably high pseudocapacitance after B-doping. This electrode also exhibits no capacitance loss when the electrode width increases, even at very high scan rates, owing to the uniform pores of the 3D-PCP. The solid-state B-3D-PCP MSC with a polymer gel electrolyte shows a capacitance of 7.1 mF/cm 2 , with a remarkable capacitance retention of 81%, especially upon a scan rate increase of 10 times at 100 mV. With B-3D-PCP MSCs, a volumetric energy density of 7.1 mWh/cm 3 and a volumetric power density of 66 W/cm 3 could be achieved. Finally, the performance of the MSC is demonstrated by using it to power various electronic devices. The results suggest a new electrode for the MSC that overcomes the performance limitations of conventional electrodes.

Published
2018

16. Rivaroxaban with or without aspirin in patients with stable peripheral or carotid artery disease: an international, randomised, double-blind, placebo-controlled trial

Author

Sonia S Anand, Jackie Bosch, John W Eikelboom, Stuart J Connolly, Rafael Diaz, Peter Widimsky, Victor Aboyans, Marco Alings, Ajay K Kakkar, Katalin Keltai, Aldo P Maggioni, Basil S Lewis, Stefan Störk, Jun Zhu, Patricio Lopez-Jaramillo, Martin O'Donnell, Patrick J Commerford, Dragos Vinereanu, Nana Pogosova, Lars Ryden, Keith A A Fox, Deepak L Bhatt, Frank Misselwitz, John D Varigos, Thomas Vanassche, Alvaro A Avezum, Edmond Chen, Kelley Branch, Darryl P Leong, Shrikant I Bangdiwala, Robert G Hart, Salim Yusuf, JORGELINA SALA, LUIS CARTASEGNA, MARISA VICO, MIGUEL ANGEL HOMINAL, EDUARDO HASBANI, ALBERTO CACCAVO, CESAR ZAIDMAN, DANIEL VOGEL, ADRIAN HRABAR, PABLO OMAR SCHYGIEL, CARLOS CUNEO, HUGO LUQUEZ, IGNACIO J. MACKINNON, RODOLFO ANDRES AHUAD GUERRERO, JUAN PABLO COSTABEL, INES PALMIRA BARTOLACCI, OSCAR MONTANA, MARIA BARBIERI, OSCAR GOMEZ VILAMAJO, RUBEN OMAR GARCIA DURAN, LILIA BEATRIZ SCHIAVI, MARCELO GARRIDO, ADRIAN INGARAMO, ANSELMO PAULINO BORDONAVA, MARIA JOSE PELAGAGGE, LEONARDO NOVARETTO, JUAN PABLO ALBISU DI GENNERO, LUZ MARIA IBANEZ SAGGIA, MOIRA ALVAREZ, NESTOR ALEJANDRO VITA, STELLA MARIS MACIN, RICARDO DARIO DRAN, MARCELO CARDONA, LUIS GUZMAN, RODOLFO JUAN SARJANOVICH, JESUS CUADRADO, SEBASTIAN NANI, MARCOS RAUL LITVAK BRUNO, CAROLINA CHACON, LAURA ELENA MAFFEI, DIEGO GRINFELD, NATALIA VENSENTINI, CLAUDIO RODOLFO MAJUL, HECTOR LUCAS LUCIARDI, PATRICIA DEL CARMEN GONZALEZ COLASO, FREDY ANTONI FERRE PACORA, PAUL VAN DEN HEUVEL, PETER VERHAMME, BAVO ECTOR, PHILIPPE DEBONNAIRE, PHILIPPE VAN DE BORNE, JEAN LEROY, HERMAN SCHROE, PASCAL VRANCKX, IVAN ELEGEERT, ETIENNE HOFFER, KARL DUJARDIN, CLARISSE INDIO DO BRASIL, DALTON PRECOMA, JOSE ANTONIO ABRANTES, EULER MANENTI, GILMAR REIS, JOSE SARAIVA, LILIA MAIA, MAURO HERNANDES, PAULO ROSSI, FABIO ROSSI DOS SANTOS, SERGIO LUIZ ZIMMERMANN, RAFAEL RECH, EDUARDO ABIB JR, PAULO LEAES, ROBERTO BOTELHO, OSCAR DUTRA, WEIMAR SOUZA, MARIA BRAILE, NILO IZUKAWA, JOSE CARLOS NICOLAU, LUIZ FERNANDO TANAJURA, CARLOS VICENTE SERRANO JUNIOR, CESAR MINELLI, LUIZ ANTONIO NASI, LIVIA OLIVEIRA, MARCELO JOSE DE CARVALHO CANTARELLI, RICHARD TYTUS, SHEKHAR PANDEY, EVA LONN, JAMES CHA, SAUL VIZEL, MOHAN BABAPULLE, ANDRE LAMY, KEVIN SAUNDERS, JOSEPH BERLINGIERI, BOB KIAII, RAKESH BHARGAVA, PRAVINSAGAR MEHTA, LAURIE HILL, DAVID FELL, ANDY LAM, FAISAL AL-QOOFI, CRAIG BROWN, ROBERT PETRELLA, JOSEPH A RICCI, ANTHONY GLANZ, NICOLAS NOISEUX, KEVIN BAINEY, FATIMA MERALI, MICHAEL HEFFERNAN, ANTHONY DELLA SIEGA, GILLES R DAGENAIS, FRANCOIS DAGENAIS, STEEVE BRULOTTE, MICHEL NGUYEN, MICHAEL HARTLEIB, RANDOLPH GUZMAN, RONALD BOURGEOIS, DENNIS RUPKA, YAARIV KHAYKIN, GILBERT GOSSELIN, THAO HUYNH, CLAUDE PILON, JEAN CAMPEAU, FRANCIS PICHETTE, ARIEL DIAZ, JAMES JOHNSTON, PRAVIN SHUKLE, GREGORY HIRSCH, PAUL RHEAULT, WLODZIMIERZ CZARNECKI, ANNIE ROY, SHAH NAWAZ, STEPHEN FREMES, DINKAR SHUKLA, GABRIEL JANO, JORGE LEONARDO COBOS, RAMON CORBALAN, MARCELO MEDINA, LEONARDO NAHUELPAN, CARLOS RAFFO, LUIS PEREZ, SERGIO POTTHOFF, BENJAMIN STOCKINS, PABLO SEPULVEDA, CHRISTIAN PINCETTI, MARGARITA VEJAR, HONGYAN TIAN, XUESI WU, YUANNAN KE, KAIYING JIA, PENGFEI YIN, ZHAOHUI WANG, LITIAN YU, SHULIN WU, ZONGQUI WU, SHAO WEN LIU, XIAO JUAN BAI, YANG ZHENG, PING YANG, YUN MEI YANG, JIWEI ZHANG, JUNBO GE, XIAO PING CHEN, JUNXIA LI, TAO HONG HU, RUIYAN ZHANG, ZHE ZHENG, XIN CHEN, LIANG TAO, JIANPING LI, WEIJIAN HUANG, GUOSHENG FU, CHUNJIAN LI, YUGANG DONG, CHUNSHENG WANG, XINMIN ZHOU, YE KONG, ARISTIDES SOTOMAYOR, JOSE LUIS ACCINI MENDOZA, HENRY CASTILLO, MIGUEL URINA, GUSTAVO AROCA, MARITZA PEREZ, DORA INES MOLINA DE SALAZAR, GREGORIO SANCHEZ VALLEJO, MANZUR J FERNANDO, HENRY GARCIA, LUIS HERNANDO GARCIA, EDGAR ARCOS, JUAN GOMEZ, FRANCISCO CUERVO MILLAN, FREDY ALBERTO TRUJILLO DADA, BORIS VESGA, GUSTAVO ADOLFO MORENO SILGADO, EVA ZIDKOVA, JEAN-CLAUDE LUBANDA, MARKETA KALETOVA, RADIM KRYZA, GABRIEL MARCINEK, MAREK RICHTER, JINDRICH SPINAR, JIRI MATUSKA, MARTIN TESAK, ZUZANA MOTOVSKA, MARIAN BRANNY, JIRI MALY, MARTIN MALY, MARTIN WIENDL, LENKA FOLTYNOVA CAISOVA, JOSEF SLABY, PETR VOJTISEK, JAN PIRK, LENKA SPINAROVA, MIROSLAVA BENESOVA, JULIA CANADYOVA, MIROSLAV HOMZA, JINDRICH FLORIAN, ROSTISLAV POLASEK, ZDENEK COUFAL, VLADIMIRA SKALNIKOVA, RADIM BRAT, MIROSLAV BRTKO, PETR JANSKY, JAROSLAV LINDNER, PAVEL MARCIAN, ZBYNEK STRAKA, MARTIN TRETINA, YAN CARLOS DUARTE, FREDDY POW CHON LONG, MAYRA SANCHEZ, JOSE LOPEZ, CARMITA PERUGACHI, RICARDO MARMOL, FREDDY TRUJILLO, PABLO TERAN, JAAKKO TUOMILEHTO, HENRI TUOMILEHTO, MARJA-LEENA TUOMINEN, ILKKA KANTOLA, GABRIEL STEG, VICTOR ABOYANS, FLORENCE LECLERCQ, EMILE FERRARI, FRANCK BOCCARA, EMMANUEL MESSAS, PATRICK MISMETTI, MARIE ANTOINETTE SEVESTRE, GUILLAUME CAYLA, PASCAL MOTREFF, STEFAN STOERK, HANS-DIRK DUENGEN, CHRISTOPH STELLBRINK, OSMAN GUEROCAK, CHRISTOPH KADEL, RUEDIGER BRAUN-DULLAEUS, MICHAEL JESERICH, CHRISTIAN OPITZ, HANS-FRIEDRICH VOEHRINGER, KARL-FRIEDRICH APPEL, BERNHARD WINKELMANN, THOMAS DORSEL, SIGRID NIKOL, HARALD DARIUS, JURGEN RANFT, SEBASTIAN SCHELLONG, WOLFGANG JUNGMAIR, PIROZE DAVIERWALA, MARC VORPAHL, LASZLO BAJNOK, ZOLTAN LASZLO, EBRAHIM NOORI, GABOR VERESS, ANDRAS VERTES, ANDRAS ZSARY, ERNO KIS, LASZLO KORANYI, JUDIT BAKAI, ZOLTAN BODA, FERENC POOR, ZOLTAN JARAI, VENDEL KEMENY, JOHN BARTON, BRENDAN MCADAM, ANDREW MURPHY, PETER CREAN, NIALL MAHON, RONAN CURTIN, BRIAIN MACNEILL, SEAN DINNEEN, MAJDI HALABI, REUVEN ZIMLICHMAN, DAVID ZELTSER, YOAV TURGEMAN, ELIEZER KLAINMAN, BASIL LEWIS, AMOS KATZ, SHAUL ATAR, EUGENIA NIKOLSKY, STEFANO BOSI, MONICA NALDI, POMPILIO FAGGIANO, DEBORA ROBBA, LUCIO MOS, GIANFRANCO SINAGRA, FRANCO COSMI, LUIGI OLTRONA VISCONTI, DE MATTEIS CARMINE, GIUSEPPE DI PASQUALE, MATTEO DI BIASE, SARA MANDORLA, MARINO BERNARDINANGELI, GIOVANNI CARLO PICCINNI, MICHELE MASSIMO GULIZIA, MARCELLO GALVANI, FLAVIO VENTURI, GIORGIO MOROCUTTI, MARIA GRAZIA BALDIN, CARLO OLIVIERI, GIAN PIERO PERNA, VINCENZO CIRRINCIONE, TAKAYASU KANNO, HIROYUKI DAIDA, YUKIO OZAKI, NAOMASA MIYAMOTO, SHINICHI HIGASHIUE, HIROSHI DOMAE, SHINOBU HOSOKAWA, HIROO KOBAYASHI, TAKEHIKO KURAMOCHI, KENSHI FUJII, KAZUAKI MIZUTOMI, KEIJIRO SAKU, KAZUO KIMURA, YOSHIHARU HIGUCHI, MITSUNORI ABE, HARUHITO OKUDA, TOSHIYUKI NODA, TERUAKI MITA, ATSUSHI HIRAYAMA, HARUHIKO ONAKA, MORIAKI INOKO, MITSUGU HIROKAMI, MUNENORI OKUBO, YUTAKA AKATSUKA, MIZUHO IMAMAKI, HARUO KAMIYA, MAMORU MANITA, TOSHIHARU HIMI, HIDEKI UENO, YUJI HISAMATSU, JUNYA AKO, YASUHIRO NISHINO, HIDEO KAWAKAMI, YUTAKA YAMADA, YUKIHIRO KORETSUNE, TAKAHISA YAMADA, TETSURO YOSHIDA, HIDEKI SHIMOMURA, NORIYUKI KINOSHITA, AKIHIKO TAKAHASHI, KHALID YUSOFF, WAN AZMAN WAN AHMAD, MUHAMMAD RADZI ABU HASSAN, SAZZLI KASIM, AIZAI AZAN ABDUL RAHIM, DIMON MOHD ZAMRIN, MASAHARU MACHIDA, YORIHIKO HIGASHINO, NORIAKI UTSU, AKIHIKO NAKANO, SHIGERU NAKAMURA, TETSUO HASHIMOTO, KENJI ANDO, TOMOHIRO SAKAMOTO, F.J. PRINS, DIRK LOK, JOHANNES GERT-JAN MILHOUS, ERIC VIERGEVER, FRANK WILLEMS, HENK SWART, MARCO ALINGS, ROB BREEDVELD, KEES-JAN DE VRIES, ROGER VAN DER BORGH, FANNY OEI, STIENEKE ZOET-NUGTEREN, HANS KRAGTEN, JEAN PAUL HERRMAN, PAUL VAN BERGEN, MARCEL GOSSELINK, EDUARD HOEKSTRA, ERWIN ZEGERS, EELKO RONNER, FRANK DEN HARTOG, GERARD BARTELS, PETER NIEROP, COEN VAN DER ZWAAN, JACOB VAN ECK, EDWIN VAN GORSELEN, BJORN GROENEMEIJER, PIETER HOOGSLAG, MARC ROBERT DE GROOT, ALDRIN LOYOLA, DENNIS JOSE SULIT, NANNETTE REY, MARIA TERESA ABOLA, DANTE MORALES, ELLEN PALOMARES, MARC EVANS ABAT, GREGORIO ROGELIO, PHILIP CHUA, JOSE CARLO DEL PILAR, JOHN DENNIS ALCARAZ, GERALDINE EBO, LOUIE TIRADOR, JOSEFINA CRUZ, JOHN ANONUEVO, ARTHUR PITARGUE, MARIANNA JANION, TOMASZ GUZIK, GRZEGORZ GAJOS, MACIEJ ZABOWKA, ANDRZEJ RYNKIEWICZ, MARLENA BRONCEL, ANDRZEJ SZUBA, DANUTA CZARNECKA, PAWEL MAGA, IRINA STRAZHESKO, YURY VASYUK, ZHANNA SIZOVA, YURY POZDNYAKOV, OLGA BARBARASH, MIKHAIL VOEVODA, TATIANA POPONINA, ALEXEY REPIN, IRINA OSIPOVA, ANNA EFREMUSHKINA, NINA NOVIKOVA, OLEG AVERKOV, DMITRY ZATEYSHCHIKOV, ARKADIY VERTKIN, AZA AUSHEVA, PATRICK COMMERFORD, SAADIYA SEEDAT, LOUIS VAN ZYL, JAN ENGELBRECHT, ELLEN MAKONLI MAKOTOKO, CATHARINA ELIZABETH PRETORIUS, ZAID MOHAMED, ADRIAN HORAK, THOMAS MABIN, ERIC KLUG, JANG-HO BAE, CHEOLHO KIM, CHONG-JIN KIM, DONG-SOO KIM, YONG JIN KIM, SEUNGJAE JOO, JONG-WON HA, CHUL SOO PARK, JANG YOUNG KIM, YOUNG-KWON KIM, CHRISTINA JARNERT, THOMAS MOOE, MIKAEL DELLBORG, INGEMAR TORSTENSSON, PER ALBERTSSON, LARS JOHANSSON, FARIS AL-KHALILI, HENRIK ALMROTH, TOMMY ANDERSSON, EMIL PANTEV, BENGT-OLOV TENGMARK, BO LIU, GUNDARS RASMANIS, CARL-MAGNUS WAHLGREN, TIZIANO MOCCETTI, ALEXANDER PARKHOMENKO, VIRA TSELUYKO, VOLODYMYR VOLKOV, OLENA KOVAL, LYUDMYLA KONONENKO, OLEKSANDR PROKHOROV, VALERIY VDOVYCHENKO, ANDRIY BAZYLEVYCH, LEONID RUDENKO, VADYM VIZIR, OLEKSANDR KARPENKO, YAROSLAV MALYNOVSKY, VALENTYNA KOVAL, BORYS STOROZHUK, JAMES COTTON, ASOK VENKATARAMAN, ANDREW MORIARTY, DEREK CONNOLLY, PATRICK DAVEY, ROXY SENIOR, INDERPAUL BIRDI, JOHN CALVERT, PATRICK DONNELLY, JASPER TREVELYAN, JUSTIN CARTER, AARON PEACE, DAVID AUSTIN, NEVILLE KUKREJA, THOMAS HILTON, SUNNY SRIVASTAVA, RONALD WALSH, RONALD FIELDS, JOSEPH HAKAS, EDWARD PORTNAY, HARINDER GOGIA, ABRAHAM SALACATA, JOHN J. HUNTER, J MICHAEL BACHARACH, NICOLAS SHAMMAS, DAMODHAR SURESH, RICKY SCHNEIDER, PAUL GURBEL, SUBHASH BANERJEE, PAUL GRENA, NOEL BEDWELL, STEPHEN SLOAN, STEVEN LUPOVITCH, ANAND SONI, KATHLEEN GIBSON, RENEE SANGRIGOLI, RAJENDRA MEHTA, PETER I-HSUAN TSAI, EVE GILLESPIE, STEPHEN DEMPSEY, GLENN HAMROFF, ROBERT BLACK, ELLIS LADER, JOHN B. KOSTIS, VERA BITTNER, WILLIAM MCGUINN, KELLEY BRANCH, VINAY MALHOTRA, STEPHEN MICHAELSON, MICHAEL VACANTE, MATTHEW MCCORMICK, RALUCA ARIMIE, ALAN CAMP, GEORGE DAGHER, N. MATHEW KOSHY, STEPHEN THEW, FREDERICK COSTELLO, MARK HEIMAN, ROBERT CHILTON, MICHAEL MORAN, FREDRIC ADLER, ANTHONY COMEROTA, ANDREW SEIWERT, WILLIAM FRENCH, HARVEY SEROTA, ROBERT HARRISON, FAISAL BAKAEEN, SHUAB OMER, LOKESH CHANDRA, ALAN WHELAN, ANDREW BOYLE, PHILIP ROBERTS-THOMSON, JAMES ROGERS, PATRICK CARROLL, DAVID COLQUHOUN, JAMES SHAW, PETER BLOMBERY, JOHN AMERENA, CHRIS HII, ALISTAIR ROYSE, BHUWAN SINGH, JOSEPH SELVANAYAGAM, SHIRLEY JANSEN, WINGCHI LO, CHRISTOPHER HAMMETT, ROHAN POULTER, SESHASAYEE NARASIMHAN, HENRIK WIGGERS, HENRIK NIELSEN, GUNNAR GISLASON, LARS KOBER, KIM HOULIND, VIBEKE BOENELYKKE SOERENSEN, ULRIK DIXEN, JENS REFSGAARD, ELISABETH ZEUTHEN, PETER SOEGAARD, MARIAN HRANAI, LUDOVIT GASPAR, DANIEL PELLA, KATARINA HATALOVA, ERIKA DROZDAKOVA, IOAN COMAN, DOINA DIMULESCU, DRAGOS VINEREANU, MIRCEA CINTEZA, CRINA SINESCU, CATALINA ARSENESCU, IMRE BENEDEK, ELENA BOBESCU, DAN DOBREANU, DAN GAITA, ADRIAN IANCU, ADRIANA ILIESIU, DANIEL LIGHEZAN, LUCIAN PETRESCU, OCTAVIAN PIRVU, IULIA TEODORESCU, DAN TESLOIANU, MARIUS MARCIAN VINTILA, OVIDIU CHIONCEL, Divisions of Cardiology and Thromboembolism McMaster University Hamiton, Population Health Research Institute, McMaster University [Hamilton, Ontario], Service de Chirurgie Thoracique et Vasculaire - Médecine vasculaire [CHU Limoges], CHU Limoges, Neuroépidémiologie Tropicale (NET), CHU Limoges-Institut d'Epidémiologie Neurologique et de Neurologie Tropicale-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut Génomique, Environnement, Immunité, Santé, Thérapeutique (GEIST), Université de Limoges (UNILIM)-Université de Limoges (UNILIM), Research Center [Associazione Nazionale Medici Cardiologi Ospedalieri] (ANMCO Research Center), Associazione Nazionale Medici Cardiologi Ospedalieri (ANMCO), Department of Statistics, University of Haifa [Haifa], Cardiology, University and Emergency Hospital, University of Edinburgh, VA Boston Healthcare System, Hamilton General Hospital, Universidad Autonoma de Madrid (UAM), Cardiology Department, Dipartimento di Bioscienze, University of Parma, University of Barcelona, Hospital Clinic Barcelona, Laval University and Hospital Heart and Lung Institute, UVSQ - UFR des sciences de la santé Simone Veil (UVSQ Santé), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), University Hospital Brno, Masaryk University, Department of Public Health, Hémostase, bio-ingénierie et remodelage cardiovasculaires (LBPC), Université Paris Diderot - Paris 7 (UPD7)-Université Paris 13 (UP13)-Université Sorbonne Paris Cité (USPC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut Galilée, Centre Hospitalier Régional Universitaire [Montpellier] (CHRU Montpellier), Hôpital Pasteur [Nice] (CHU), Service de Cardiologie [CHU Saint-Antoine], Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-CHU Saint-Antoine [APHP], Paris-Centre de Recherche Cardiovasculaire (PARCC - UMR-S U970), Université Paris Descartes - Paris 5 (UPD5)-Hôpital Européen Georges Pompidou [APHP] (HEGP), Hôpitaux Universitaires Paris Ouest - Hôpitaux Universitaires Île de France Ouest (HUPO)-Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-Hôpitaux Universitaires Paris Ouest - Hôpitaux Universitaires Île de France Ouest (HUPO)-Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-Institut National de la Santé et de la Recherche Médicale (INSERM), Groupe de recherche sur la thrombose (GRT (EA 3065)), Université Jean Monnet [Saint-Étienne] (UJM), Centre Hospitalier Régional Universitaire de Nîmes (CHRU Nîmes), CHU Gabriel Montpied (CHU), CHU Clermont-Ferrand, Department of Medicine (DEBRECEN - Dpt Medicine), University of Debrecen, University of Trieste, Lab Dev Cell Biol,Bunkyo Ku, The University of Tokyo, The Netherlands Organisation for Applied Scientific Research (TNO), Regional Specialist Hospital in Wroclaw, Research and Development Centre, Kamienskiego, Division of Angiology, Wroclaw Medical University, Sahlgrenska University Hospital/Östra, Cardiocentro Ticino [Lugano], University of Zürich [Zürich] (UZH), Danylo Halytskyi Lviv National Medical University, Department of Cardiology, Sandwell General Hospital, Physiopathologie et thérapie des déficits sensoriels et moteurs, Université Montpellier 2 - Sciences et Techniques (UM2)-IFR76-Institut National de la Santé et de la Recherche Médicale (INSERM), Rigshospitalet [Copenhagen], Université de Médecine Carol Davila, Cardiology Department [Târgu Mureș], University of Medicine and Pharmacy of Târgu Mureș, Institute for Cardiovascular Diseases C.C. Iliescu, Institut Génomique, Environnement, Immunité, Santé, Thérapeutique (GEIST), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-CHU Limoges-Institut d'Epidémiologie Neurologique et de Neurologie Tropicale-Institut National de la Santé et de la Recherche Médicale (INSERM), Associazione Nazionale Medici Cardiologi Ospedalieri [Firenze] (ANMCO), University of Parma = Università degli studi di Parma [Parme, Italie], Université de Versailles Saint-Quentin-en-Yvelines - UFR Sciences de la santé Simone Veil (UVSQ Santé), CHU Saint-Antoine [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Hôpital Européen Georges Pompidou [APHP] (HEGP), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpitaux Universitaires Paris Ouest - Hôpitaux Universitaires Île de France Ouest (HUPO)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpitaux Universitaires Paris Ouest - Hôpitaux Universitaires Île de France Ouest (HUPO)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Universitaire de Nîmes (CHU Nîmes), CHU Gabriel Montpied [Clermont-Ferrand], The University of Tokyo (UTokyo), Universität Zürich [Zürich] = University of Zurich (UZH), and Copenhagen University Hospital

Subjects
Carotid Artery Diseases, Male, Myocardial Infarction, MESH: Lower Extremity, 030204 cardiovascular system & hematology, THERAPY, Stroke/epidemiology, MESH: Dose-Response Relationship, Drug, 0302 clinical medicine, Rivaroxaban, prevention, Hemorrhage/chemically induced, MESH: Peripheral Arterial Disease, MESH: Double-Blind Method, guidelines, MESH: Incidence, 030212 general & internal medicine, Cardiovascular Diseases/mortality, risk, RISK, MESH: Aged, MESH: Middle Aged, Incidence, General Medicine, Middle Aged, 3. Good health, Stroke, MESH: Myocardial Infarction, Lower Extremity, Cardiovascular Diseases, MESH: Platelet Aggregation Inhibitors, Factor Xa Inhibitors/administration & dosage, Drug Therapy, Combination, Female, MESH: Factor Xa Inhibitors, OUTPATIENTS, MESH: Rivaroxaban, management, MESH: Hemorrhage, metaanalysis, Lower Extremity/blood supply, Rivaroxaban/administration & dosage, Hemorrhage, MESH: Drug Administration Schedule, Amputation, Surgical, Drug Administration Schedule, MESH: Stroke, Peripheral Arterial Disease, 03 medical and health sciences, Double-Blind Method, atherothrombosis, Myocardial Infarction/epidemiology, MANAGEMENT, Humans, MESH: Amputation, MESH: Aspirin, Aspirin/administration & dosage, Platelet Aggregation Inhibitors/administration & dosage, METAANALYSIS, Aged, MESH: Humans, Aspirin, Dose-Response Relationship, Drug, MESH: Carotid Artery Diseases, MORTALITY, MESH: Cardiovascular Diseases, cardiovascular event rates, PREVENTION, CARDIOVASCULAR EVENT RATES, MESH: Male, outpatients, atrial-fibrillation, MESH: Drug Therapy, Combination, MESH: Morbidity, Carotid Artery Diseases/complications, lower-extremity amputation, Peripheral Arterial Disease/complications, [SDV.SPEE]Life Sciences [q-bio]/Santé publique et épidémiologie, Morbidity, MESH: Female, Platelet Aggregation Inhibitors, Amputation/statistics & numerical data, Factor Xa Inhibitors
Abstract

BACKGROUND: Patients with peripheral artery disease have an increased risk of cardiovascular morbidity and mortality. Antiplatelet agents are widely used to reduce these complications.METHODS: This was a multicentre, double-blind, randomised placebo-controlled trial for which patients were recruited at 602 hospitals, clinics, or community practices from 33 countries across six continents. Eligible patients had a history of peripheral artery disease of the lower extremities (previous peripheral bypass surgery or angioplasty, limb or foot amputation, intermittent claudication with objective evidence of peripheral artery disease), of the carotid arteries (previous carotid artery revascularisation or asymptomatic carotid artery stenosis of at least 50%), or coronary artery disease with an ankle-brachial index of less than 0·90. After a 30-day run-in period, patients were randomly assigned (1:1:1) to receive oral rivaroxaban (2·5 mg twice a day) plus aspirin (100 mg once a day), rivaroxaban twice a day (5 mg with aspirin placebo once a day), or to aspirin once a day (100 mg and rivaroxaban placebo twice a day). Randomisation was computer generated. Each treatment group was double dummy, and the patient, investigators, and central study staff were masked to treatment allocation. The primary outcome was cardiovascular death, myocardial infarction or stroke; the primary peripheral artery disease outcome was major adverse limb events including major amputation. This trial is registered with ClinicalTrials.gov, number NCT01776424, and is closed to new participants.FINDINGS: Between March 12, 2013, and May 10, 2016, we enrolled 7470 patients with peripheral artery disease from 558 centres. The combination of rivaroxaban plus aspirin compared with aspirin alone reduced the composite endpoint of cardiovascular death, myocardial infarction, or stroke (126 [5%] of 2492 vs 174 [7%] of 2504; hazard ratio [HR] 0·72, 95% CI 0·57-0·90, p=0·0047), and major adverse limb events including major amputation (32 [1%] vs 60 [2%]; HR 0·54 95% CI 0·35-0·82, p=0·0037). Rivaroxaban 5 mg twice a day compared with aspirin alone did not significantly reduce the composite endpoint (149 [6%] of 2474 vs 174 [7%] of 2504; HR 0·86, 95% CI 0·69-1·08, p=0·19), but reduced major adverse limb events including major amputation (40 [2%] vs 60 [2%]; HR 0·67, 95% CI 0·45-1·00, p=0·05). The median duration of treatment was 21 months. The use of the rivaroxaban plus aspirin combination increased major bleeding compared with the aspirin alone group (77 [3%] of 2492 vs 48 [2%] of 2504; HR 1·61, 95% CI 1·12-2·31, p=0·0089), which was mainly gastrointestinal. Similarly, major bleeding occurred in 79 (3%) of 2474 patients with rivaroxaban 5 mg, and in 48 (2%) of 2504 in the aspirin alone group (HR 1·68, 95% CI 1·17-2·40; p=0·0043).INTERPRETATION: Low-dose rivaroxaban taken twice a day plus aspirin once a day reduced major adverse cardiovascular and limb events when compared with aspirin alone. Although major bleeding was increased, fatal or critical organ bleeding was not. This combination therapy represents an important advance in the management of patients with peripheral artery disease. Rivaroxaban alone did not significantly reduce major adverse cardiovascular events compared with asprin alone, but reduced major adverse limb events and increased major bleeding.FUNDING: Bayer AG.

Published
2018

18. Hierarchical Pore-Patterned Carbon Electrodes for High-Volumetric Energy Density Micro-Supercapacitors

Author

Cheolho Kim and Jun Hyuk Moon

Subjects
Supercapacitor, Materials science, business.industry, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Isotropic etching, Capacitance, Energy storage, 0104 chemical sciences, chemistry, Electrode, Optoelectronics, General Materials Science, 0210 nano-technology, business, Carbon, Diode, Power density
Abstract

Micro-supercapacitors (MSCs) are attractive for applications in next-generation mobile and wearable devices and have the potential to complement or even replace lithium batteries. However, many previous MSCs have often exhibited a low volumetric energy density with high-loading electrodes because of the nonuniform pore structure of the electrodes. To address this issue, we introduced a uniform-pore carbon electrode fabricated by 3D interference lithography. Furthermore, a hierarchical pore-patterned carbon (hPC) electrode was formed by introducing a micropore by chemical etching into the macropore carbon skeleton. The hPC electrodes were applied to solid-state MSCs. We achieved a constant volumetric capacitance and a corresponding volumetric energy density for electrodes of various thicknesses. The hPC MSC reached a volumetric energy density of approximately 1.43 mW h/cm3. The power density of the hPC MSC was 1.69 W/cm3. We could control the capacitance and voltage additionally by connecting the unit MSC cells in series or parallel, and we confirmed the operation of a light-emitting diode. We believe that our pore-patterned electrodes will provide a new platform for compact but high-performance energy storage devices.

Published
2018

19. Rivaroxaban with or without aspirin in patients with stable coronary artery disease : an international, randomised, double-blind, placebo-controlled trial

Author

Stuart J Connolly, John W Eikelboom, Jackie Bosch, Gilles Dagenais, Leanne Dyal, Fernando Lanas, Kaj Metsarinne, Martin O'Donnell, Anthony L Dans, Jong-Won Ha, Alexandr N Parkhomenko, Alvaro A Avezum, Eva Lonn, Liu Lisheng, Christian Torp-Pedersen, Petr Widimsky, Aldo P Maggioni, Camilo Felix, Katalin Keltai, Masatsugu Hori, Khalid Yusoff, Tomasz J Guzik, Deepak L Bhatt, Kelley R H Branch, Nancy Cook Bruns, Scott D Berkowitz, Sonia S Anand, John D Varigos, Keith A A Fox, Salim Yusuf, JORGELINA SALA, LUIS CARTASEGNA, MARISA VICO, MIGUEL ANGEL HOMINAL, EDUARDO HASBANI, ALBERTO CACCAVO, CESAR ZAIDMAN, DANIEL VOGEL, ADRIAN HRABAR, PABLO OMAR SCHYGIEL, CARLOS CUNEO, HUGO LUQUEZ, IGNACIO J. MACKINNON, RODOLFO ANDRES AHUAD GUERRERO, JUAN PABLO COSTABEL, INES PALMIRA BARTOLACCI, OSCAR MONTANA, MARIA BARBIERI, OSCAR GOMEZ VILAMAJO, RUBEN OMAR GARCIA DURAN, LILIA BEATRIZ SCHIAVI, MARCELO GARRIDO, ADRIAN INGARAMO, ANSELMO PAULINO BORDONAVA, MARIA JOSE PELAGAGGE, LEONARDO NOVARETTO, JUAN PABLO ALBISU DI GENNERO, LUZ MARIA IBANEZ SAGGIA, MOIRA ALVAREZ, NESTOR ALEJANDRO VITA, STELLA MARIS MACIN, RICARDO DARIO DRAN, MARCELO CARDONA, LUIS GUZMAN, RODOLFO JUAN SARJANOVICH, JESUS CUADRADO, SEBASTIAN NANI, MARCOS RAUL LITVAK BRUNO, CAROLINA CHACON, LAURA ELENA MAFFEI, DIEGO GRINFELD, NATALIA VENSENTINI, CLAUDIO RODOLFO MAJUL, HECTOR LUCAS LUCIARDI, PATRICIA DEL CARMEN GONZALEZ COLASO, FREDY ANTONI FERRE PACORA, PAUL VAN DEN HEUVEL, PETER VERHAMME, BAVO ECTOR, PHILIPPE DEBONNAIRE, PHILIPPE VAN DE BORNE, JEAN LEROY, HERMAN SCHROE, PASCAL VRANCKX, IVAN ELEGEERT, ETIENNE HOFFER, KARL DUJARDIN, CLARISSE INDIO DO BRASIL, DALTON PRECOMA, JOSE ANTONIO ABRANTES, EULER MANENTI, GILMAR REIS, JOSE SARAIVA, LILIA MAIA, MAURO HERNANDES, PAULO ROSSI, FABIO ROSSI DOS SANTOS, SERGIO LUIZ ZIMMERMANN, RAFAEL RECH, EDUARDO ABIB JR, PAULO LEAES, ROBERTO BOTELHO, OSCAR DUTRA, WEIMAR SOUZA, MARIA BRAILE, NILO IZUKAWA, JOSE CARLOS NICOLAU, LUIZ FERNANDO TANAJURA, CARLOS VICENTE SERRANO JUNIOR, CESAR MINELLI, LUIZ ANTONIO NASI, LIVIA OLIVEIRA, MARCELO JOSE DE CARVALHO CANTARELLI, RICHARD TYTUS, SHEKHAR PANDEY, EVA LONN, JAMES CHA, SAUL VIZEL, MOHAN BABAPULLE, ANDRE LAMY, KEVIN SAUNDERS, JOSEPH BERLINGIERI, BOB KIAII, RAKESH BHARGAVA, PRAVINSAGAR MEHTA, LAURIE HILL, DAVID FELL, ANDY LAM, FAISAL AL-QOOFI, CRAIG BROWN, ROBERT PETRELLA, JOSEPH A RICCI, ANTHONY GLANZ, NICOLAS NOISEUX, KEVIN BAINEY, FATIMA MERALI, MICHAEL HEFFERNAN, ANTHONY DELLA SIEGA, GILLES R DAGENAIS, FRANCOIS DAGENAIS, STEEVE BRULOTTE, MICHEL NGUYEN, MICHAEL HARTLEIB, RANDOLPH GUZMAN, RONALD BOURGEOIS, DENNIS RUPKA, YAARIV KHAYKIN, GILBERT GOSSELIN, THAO HUYNH, CLAUDE PILON, JEAN CAMPEAU, FRANCIS PICHETTE, ARIEL DIAZ, JAMES JOHNSTON, PRAVIN SHUKLE, GREGORY HIRSCH, PAUL RHEAULT, WLODZIMIERZ CZARNECKI, ANNIE ROY, SHAH NAWAZ, STEPHEN FREMES, DINKAR SHUKLA, GABRIEL JANO, JORGE LEONARDO COBOS, RAMON CORBALAN, MARCELO MEDINA, LEONARDO NAHUELPAN, CARLOS RAFFO, LUIS PEREZ, SERGIO POTTHOFF, BENJAMIN STOCKINS, PABLO SEPULVEDA, CHRISTIAN PINCETTI, MARGARITA VEJAR, HONGYAN TIAN, XUESI WU, YUANNAN KE, KAIYING JIA, PENGFEI YIN, ZHAOHUI WANG, LITIAN YU, SHULIN WU, ZONGQUI WU, SHAO WEN LIU, XIAO JUAN BAI, YANG ZHENG, PING YANG, YUN MEI YANG, JIWEI ZHANG, JUNBO GE, XIAO PING CHEN, JUNXIA LI, TAO HONG HU, RUIYAN ZHANG, ZHE ZHENG, XIN CHEN, LIANG TAO, JIANPING LI, WEIJIAN HUANG, GUOSHENG FU, CHUNJIAN LI, YUGANG DONG, CHUNSHENG WANG, XINMIN ZHOU, YE KONG, ARISTIDES SOTOMAYOR, JOSE LUIS ACCINI MENDOZA, HENRY CASTILLO, MIGUEL URINA, GUSTAVO AROCA, MARITZA PEREZ, DORA INES MOLINA DE SALAZAR, GREGORIO SANCHEZ VALLEJO, MANZUR J FERNANDO, HENRY GARCIA, LUIS HERNANDO GARCIA, EDGAR ARCOS, JUAN GOMEZ, FRANCISCO CUERVO MILLAN, FREDY ALBERTO TRUJILLO DADA, BORIS VESGA, GUSTAVO ADOLFO MORENO SILGADO, EVA ZIDKOVA, JEAN-CLAUDE LUBANDA, MARKETA KALETOVA, RADIM KRYZA, GABRIEL MARCINEK, MAREK RICHTER, JINDRICH SPINAR, JIRI MATUSKA, MARTIN TESAK, ZUZANA MOTOVSKA, MARIAN BRANNY, JIRI MALY, MARTIN MALY, MARTIN WIENDL, LENKA FOLTYNOVA CAISOVA, JOSEF SLABY, PETR VOJTISEK, JAN PIRK, LENKA SPINAROVA, MIROSLAVA BENESOVA, JULIA CANADYOVA, MIROSLAV HOMZA, JINDRICH FLORIAN, ROSTISLAV POLASEK, ZDENEK COUFAL, VLADIMIRA SKALNIKOVA, RADIM BRAT, MIROSLAV BRTKO, PETR JANSKY, JAROSLAV LINDNER, PAVEL MARCIAN, ZBYNEK STRAKA, MARTIN TRETINA, YAN CARLOS DUARTE, FREDDY POW CHON LONG, MAYRA SANCHEZ, JOSE LOPEZ, CARMITA PERUGACHI, RICARDO MARMOL, FREDDY TRUJILLO, PABLO TERAN, JAAKKO TUOMILEHTO, HENRI TUOMILEHTO, MARJA-LEENA TUOMINEN, ILKKA KANTOLA, GABRIEL STEG, VICTOR ABOYANS, FLORENCE LECLERCQ, EMILE FERRARI, FRANCK BOCCARA, EMMANUEL MESSAS, PATRICK MISMETTI, MARIE ANTOINETTE SEVESTRE, GUILLAUME CAYLA, PASCAL MOTREFF, STEFAN STOERK, HANS-DIRK DUENGEN, CHRISTOPH STELLBRINK, OSMAN GUEROCAK, CHRISTOPH KADEL, RUEDIGER BRAUN-DULLAEUS, MICHAEL JESERICH, CHRISTIAN OPITZ, HANS-FRIEDRICH VOEHRINGER, KARL-FRIEDRICH APPEL, BERNHARD WINKELMANN, THOMAS DORSEL, SIGRID NIKOL, HARALD DARIUS, JURGEN RANFT, SEBASTIAN SCHELLONG, WOLFGANG JUNGMAIR, PIROZE DAVIERWALA, MARC VORPAHL, LASZLO BAJNOK, ZOLTAN LASZLO, EBRAHIM NOORI, GABOR VERESS, ANDRAS VERTES, ANDRAS ZSARY, ERNO KIS, LASZLO KORANYI, JUDIT BAKAI, ZOLTAN BODA, FERENC POOR, ZOLTAN JARAI, VENDEL KEMENY, JOHN BARTON, BRENDAN MCADAM, ANDREW MURPHY, PETER CREAN, NIALL MAHON, RONAN CURTIN, BRIAIN MACNEILL, SEAN DINNEEN, MAJDI HALABI, REUVEN ZIMLICHMAN, DAVID ZELTSER, YOAV TURGEMAN, ELIEZER KLAINMAN, BASIL LEWIS, AMOS KATZ, SHAUL ATAR, EUGENIA NIKOLSKY, STEFANO BOSI, MONICA NALDI, POMPILIO FAGGIANO, DEBORA ROBBA, LUCIO MOS, GIANFRANCO SINAGRA, FRANCO COSMI, LUIGI OLTRONA VISCONTI, DE MATTEIS CARMINE, GIUSEPPE DI PASQUALE, MATTEO DI BIASE, SARA MANDORLA, MARINO BERNARDINANGELI, GIOVANNI CARLO PICCINNI, MICHELE MASSIMO GULIZIA, MARCELLO GALVANI, FLAVIO VENTURI, GIORGIO MOROCUTTI, MARIA GRAZIA BALDIN, CARLO OLIVIERI, GIAN PIERO PERNA, VINCENZO CIRRINCIONE, TAKAYASU KANNO, HIROYUKI DAIDA, YUKIO OZAKI, NAOMASA MIYAMOTO, SHINICHI HIGASHIUE, HIROSHI DOMAE, SHINOBU HOSOKAWA, HIROO KOBAYASHI, TAKEHIKO KURAMOCHI, KENSHI FUJII, KAZUAKI MIZUTOMI, KEIJIRO SAKU, KAZUO KIMURA, YOSHIHARU HIGUCHI, MITSUNORI ABE, HARUHITO OKUDA, TOSHIYUKI NODA, TERUAKI MITA, ATSUSHI HIRAYAMA, HARUHIKO ONAKA, MORIAKI INOKO, MITSUGU HIROKAMI, MUNENORI OKUBO, YUTAKA AKATSUKA, MIZUHO IMAMAKI, HARUO KAMIYA, MAMORU MANITA, TOSHIHARU HIMI, HIDEKI UENO, YUJI HISAMATSU, JUNYA AKO, YASUHIRO NISHINO, HIDEO KAWAKAMI, YUTAKA YAMADA, YUKIHIRO KORETSUNE, TAKAHISA YAMADA, TETSURO YOSHIDA, HIDEKI SHIMOMURA, NORIYUKI KINOSHITA, AKIHIKO TAKAHASHI, KHALID YUSOFF, WAN AZMAN WAN AHMAD, MUHAMMAD RADZI ABU HASSAN, SAZZLI KASIM, AIZAI AZAN ABDUL RAHIM, DIMON MOHD ZAMRIN, MASAHARU MACHIDA, YORIHIKO HIGASHINO, NORIAKI UTSU, AKIHIKO NAKANO, SHIGERU NAKAMURA, TETSUO HASHIMOTO, KENJI ANDO, TOMOHIRO SAKAMOTO, F.J. PRINS, DIRK LOK, JOHANNES GERT-JAN MILHOUS, ERIC VIERGEVER, FRANK WILLEMS, HENK SWART, MARCO ALINGS, ROB BREEDVELD, KEES-JAN DE VRIES, ROGER VAN DER BORGH, FANNY OEI, STIENEKE ZOET-NUGTEREN, HANS KRAGTEN, JEAN PAUL HERRMAN, PAUL VAN BERGEN, MARCEL GOSSELINK, EDUARD HOEKSTRA, ERWIN ZEGERS, EELKO RONNER, FRANK DEN HARTOG, GERARD BARTELS, PETER NIEROP, COEN VAN DER ZWAAN, JACOB VAN ECK, EDWIN VAN GORSELEN, BJORN GROENEMEIJER, PIETER HOOGSLAG, MARC ROBERT DE GROOT, ALDRIN LOYOLA, DENNIS JOSE SULIT, NANNETTE REY, MARIA TERESA ABOLA, DANTE MORALES, ELLEN PALOMARES, MARC EVANS ABAT, GREGORIO ROGELIO, PHILIP CHUA, JOSE CARLO DEL PILAR, JOHN DENNIS ALCARAZ, GERALDINE EBO, LOUIE TIRADOR, JOSEFINA CRUZ, JOHN ANONUEVO, ARTHUR PITARGUE, MARIANNA JANION, TOMASZ GUZIK, GRZEGORZ GAJOS, MACIEJ ZABOWKA, ANDRZEJ RYNKIEWICZ, MARLENA BRONCEL, ANDRZEJ SZUBA, DANUTA CZARNECKA, PAWEL MAGA, IRINA STRAZHESKO, YURY VASYUK, ZHANNA SIZOVA, YURY POZDNYAKOV, OLGA BARBARASH, MIKHAIL VOEVODA, TATIANA POPONINA, ALEXEY REPIN, IRINA OSIPOVA, ANNA EFREMUSHKINA, NINA NOVIKOVA, OLEG AVERKOV, DMITRY ZATEYSHCHIKOV, ARKADIY VERTKIN, AZA AUSHEVA, PATRICK COMMERFORD, SAADIYA SEEDAT, LOUIS VAN ZYL, JAN ENGELBRECHT, ELLEN MAKONLI MAKOTOKO, CATHARINA ELIZABETH PRETORIUS, ZAID MOHAMED, ADRIAN HORAK, THOMAS MABIN, ERIC KLUG, JANG-HO BAE, CHEOLHO KIM, CHONG-JIN KIM, DONG-SOO KIM, YONG JIN KIM, SEUNGJAE JOO, JONG-WON HA, CHUL SOO PARK, JANG YOUNG KIM, YOUNG-KWON KIM, CHRISTINA JARNERT, THOMAS MOOE, MIKAEL DELLBORG, INGEMAR TORSTENSSON, PER ALBERTSSON, LARS JOHANSSON, FARIS AL-KHALILI, HENRIK ALMROTH, TOMMY ANDERSSON, EMIL PANTEV, BENGT-OLOV TENGMARK, BO LIU, GUNDARS RASMANIS, CARL-MAGNUS WAHLGREN, TIZIANO MOCCETTI, ALEXANDER PARKHOMENKO, VIRA TSELUYKO, VOLODYMYR VOLKOV, OLENA KOVAL, LYUDMYLA KONONENKO, OLEKSANDR PROKHOROV, VALERIY VDOVYCHENKO, ANDRIY BAZYLEVYCH, LEONID RUDENKO, VADYM VIZIR, OLEKSANDR KARPENKO, YAROSLAV MALYNOVSKY, VALENTYNA KOVAL, BORYS STOROZHUK, JAMES COTTON, ASOK VENKATARAMAN, ANDREW MORIARTY, DEREK CONNOLLY, PATRICK DAVEY, ROXY SENIOR, INDERPAUL BIRDI, JOHN CALVERT, PATRICK DONNELLY, JASPER TREVELYAN, JUSTIN CARTER, AARON PEACE, DAVID AUSTIN, NEVILLE KUKREJA, THOMAS HILTON, SUNNY SRIVASTAVA, RONALD WALSH, RONALD FIELDS, JOSEPH HAKAS, EDWARD PORTNAY, HARINDER GOGIA, ABRAHAM SALACATA, JOHN J. HUNTER, J MICHAEL BACHARACH, NICOLAS SHAMMAS, DAMODHAR SURESH, RICKY SCHNEIDER, PAUL GURBEL, SUBHASH BANERJEE, PAUL GRENA, NOEL BEDWELL, STEPHEN SLOAN, STEVEN LUPOVITCH, ANAND SONI, KATHLEEN GIBSON, RENEE SANGRIGOLI, RAJENDRA MEHTA, PETER I-HSUAN TSAI, EVE GILLESPIE, STEPHEN DEMPSEY, GLENN HAMROFF, ROBERT BLACK, ELLIS LADER, JOHN B. KOSTIS, VERA BITTNER, WILLIAM MCGUINN, KELLEY BRANCH, VINAY MALHOTRA, STEPHEN MICHAELSON, MICHAEL VACANTE, MATTHEW MCCORMICK, RALUCA ARIMIE, ALAN CAMP, GEORGE DAGHER, N. MATHEW KOSHY, STEPHEN THEW, FREDERICK COSTELLO, MARK HEIMAN, ROBERT CHILTON, MICHAEL MORAN, FREDRIC ADLER, ANTHONY COMEROTA, ANDREW SEIWERT, WILLIAM FRENCH, HARVEY SEROTA, ROBERT HARRISON, FAISAL BAKAEEN, SHUAB OMER, LOKESH CHANDRA, ALAN WHELAN, ANDREW BOYLE, PHILIP ROBERTS-THOMSON, JAMES ROGERS, PATRICK CARROLL, DAVID COLQUHOUN, JAMES SHAW, PETER BLOMBERY, JOHN AMERENA, CHRIS HII, ALISTAIR ROYSE, BHUWAN SINGH, JOSEPH SELVANAYAGAM, SHIRLEY JANSEN, WINGCHI LO, CHRISTOPHER HAMMETT, ROHAN POULTER, SESHASAYEE NARASIMHAN, HENRIK WIGGERS, HENRIK NIELSEN, GUNNAR GISLASON, LARS KOBER, KIM HOULIND, VIBEKE BOENELYKKE SOERENSEN, ULRIK DIXEN, JENS REFSGAARD, ELISABETH ZEUTHEN, PETER SOEGAARD, MARIAN HRANAI, LUDOVIT GASPAR, DANIEL PELLA, KATARINA HATALOVA, ERIKA DROZDAKOVA, IOAN COMAN, DOINA DIMULESCU, DRAGOS VINEREANU, MIRCEA CINTEZA, CRINA SINESCU, CATALINA ARSENESCU, IMRE BENEDEK, ELENA BOBESCU, DAN DOBREANU, DAN GAITA, ADRIAN IANCU, ADRIANA ILIESIU, DANIEL LIGHEZAN, LUCIAN PETRESCU, OCTAVIAN PIRVU, IULIA TEODORESCU, DAN TESLOIANU, MARIUS MARCIAN VINTILA, and OVIDIU CHIONCEL

Subjects
Male, medicine.medical_treatment, Myocardial Infarction, Coronary Artery Disease, 030204 cardiovascular system & hematology, Stroke/epidemiology, Coronary artery disease, 0302 clinical medicine, Rivaroxaban, Hemorrhage/chemically induced, Carotid artery disease, 030212 general & internal medicine, Myocardial infarction, Cardiovascular Diseases/mortality, Aspirin, Atrial fibrillation, General Medicine, Stroke, ORAL RIVAROXABAN, Cardiovascular Diseases, Factor Xa Inhibitors/administration & dosage, Cardiology, Female, Drug Therapy, Combination, medicine.drug, medicine.medical_specialty, Rivaroxaban/administration & dosage, Coronary Artery Disease/drug therapy, Hemorrhage, Drug Administration Schedule, 03 medical and health sciences, Double-Blind Method, Internal medicine, Journal Article, Myocardial Infarction/epidemiology, medicine, Humans, Aspirin/administration & dosage, Platelet Aggregation Inhibitors/administration & dosage, Aged, Dose-Response Relationship, Drug, business.industry, Unstable angina, Percutaneous coronary intervention, medicine.disease, PREVENTION, Morbidity, business, Platelet Aggregation Inhibitors, Factor Xa Inhibitors
Abstract

BACKGROUND: Coronary artery disease is a major cause of morbidity and mortality worldwide, and is a consequence of acute thrombotic events involving activation of platelets and coagulation proteins. Factor Xa inhibitors and aspirin each reduce thrombotic events but have not yet been tested in combination or against each other in patients with stable coronary artery disease.METHODS: In this multicentre, double-blind, randomised, placebo-controlled, outpatient trial, patients with stable coronary artery disease or peripheral artery disease were recruited at 602 hospitals, clinics, or community centres in 33 countries. This paper reports on patients with coronary artery disease. Eligible patients with coronary artery disease had to have had a myocardial infarction in the past 20 years, multi-vessel coronary artery disease, history of stable or unstable angina, previous multi-vessel percutaneous coronary intervention, or previous multi-vessel coronary artery bypass graft surgery. After a 30-day run in period, patients were randomly assigned (1:1:1) to receive rivaroxaban (2·5 mg orally twice a day) plus aspirin (100 mg once a day), rivaroxaban alone (5 mg orally twice a day), or aspirin alone (100 mg orally once a day). Randomisation was computer generated. Each treatment group was double dummy, and the patients, investigators, and central study staff were masked to treatment allocation. The primary outcome of the COMPASS trial was the occurrence of myocardial infarction, stroke, or cardiovascular death. This trial is registered with ClinicalTrials.gov, number NCT01776424, and is closed to new participants.FINDINGS: Between March 12, 2013, and May 10, 2016, 27 395 patients were enrolled to the COMPASS trial, of whom 24 824 patients had stable coronary artery disease from 558 centres. The combination of rivaroxaban plus aspirin reduced the primary outcome more than aspirin alone (347 [4%] of 8313 vs 460 [6%] of 8261; hazard ratio [HR] 0·74, 95% CI 0·65-0·86, pINTERPRETATION: In patients with stable coronary artery disease, addition of rivaroxaban to aspirin lowered major vascular events, but increased major bleeding. There was no significant increase in intracranial bleeding or other critical organ bleeding. There was also a significant net benefit in favour of rivaroxaban plus aspirin and deaths were reduced by 23%. Thus, addition of rivaroxaban to aspirin has the potential to substantially reduce morbidity and mortality from coronary artery disease worldwide.FUNDING: Bayer AG.

Published
2018

20. High-Throughput Low-Complexity Successive-Cancellation Polar Decoder Architecture using One's Complement Scheme

Author

Cheolho Kim, Haram Yun, Hanho Lee, and Sabooh Ajaz

Subjects
Adder, Computer science, Polar code, business.industry, Clock rate, Electronic, Optical and Magnetic Materials, Complement (complexity), Reduction (complexity), Soft-decision decoder, Electronic engineering, Electrical and Electronic Engineering, business, Throughput (business), Decoding methods, Computer hardware
Abstract

This paper presents a high-throughput lowcomplexity decoder architecture and design technique to implement successive-cancellation (SC) polar decoding. A novel merged processing element with a one’s complement scheme, a main frame with optimal internal word length, and optimized feedback part architecture are proposed. Generally, a polar decoder uses a two’s complement scheme in merged processing elements, in which a conversion between two’s complement and sign-magnitude requires an adder. However, the novel merged processing elements do not require an adder. Moreover, in order to reduce hardware complexity, optimized main frame and feedback part approaches are also presented. A (1024, 512) SC polar decoder was designed and implemented using 40-nm CMOS standard cell technology. Synthesis results show that the proposed SC polar decoder can lead to a 13% reduction in hardware complexity and a higher clock speed compared to conventional decoders.

Published
2015

22. Highly N-doped microporous carbon nanospheres with high energy storage and conversion efficiency

Author

Jun Hyuk Moon, Kiwon Kim, and Cheolho Kim

Subjects
Supercapacitor, Auxiliary electrode, Multidisciplinary, Materials science, lcsh:R, Energy conversion efficiency, lcsh:Medicine, 02 engineering and technology, Microporous material, 010402 general chemistry, 021001 nanoscience & nanotechnology, Electrochemistry, 01 natural sciences, Article, 0104 chemical sciences, chemistry.chemical_compound, Chemical engineering, chemistry, Electrode, lcsh:Q, Polystyrene, lcsh:Science, 0210 nano-technology, BET theory
Abstract

Porous carbon spheres (CSs) have distinct advantages in energy storage and conversion applications. We report the preparation of highly monodisperse N-doped microporous CSs through the carbonization of polystyrene-based polymer spheres and subsequent activation. The N-doped microporous CSs have a remarkably high N-doping content, over 10%, and high BET surface area of 884.9 m2 g−1. We characterize the synergistic effects of the micropores and N doping on the energy storage performance of a supercapacitor electrode consisting of the CSs and on the performance in an electrocatalytic reaction of a CS counter electrode in a photovoltaic cell. The N-doped microporous CSs exhibit a maximum capacitance of 373 F g−1 at a current density of 0.2 Ag−1, a high capacitance retention up to 62% with a 10-fold increase in current density, and excellent stability over 10,000 charge/discharge cycles. A counter electrode consisting of N-doped microporous CSs was found to exhibit superior electrocatalytic behavior to an electrode consisting of conventional Pt nanoparticles. These CSs derived from polymer spheres synthesized by addition polymerization will be new platform materials with high electrochemical performance.

Published
2017

26. Low-Complexity Triple-Error-Correcting Parallel BCH Decoder

Author

Jae-Woong Yeon, Cheolho Kim, Seung-Jun Yang, and Hanho Lee

Subjects
Computational complexity theory, Computer science, Data_CODINGANDINFORMATIONTHEORY, MAXEkSAT, Electronic, Optical and Magnetic Materials, law.invention, Soft-decision decoder, Calculator, law, Forward error correction, Electrical and Electronic Engineering, Latency (engineering), Algorithm, BCH code, Decoding methods
Abstract

This paper presents a low-complexity triple-error-correcting parallel Bose-Chaudhuri- Hocquenghem (BCH) decoder architecture and its efficient design techniques. A novel modified step-by- step (m-SBS) decoding algorithm, which significantly reduces computational complexity, is proposed for the parallel BCH decoder. In addition, a determinant calculator and a error locator are proposed to reduce hardware complexity. Specifically, a sharing syndrome factor calculator and a self-error detection scheme are proposed. The multi-channel multi- parallel BCH decoder using the proposed m-SBS algorithm and design techniques have considerably less hardware complexity and latency than those using a conventional algorithms. For a 16-channel 4- parallel (1020, 990) BCH decoder over GF(2 12 ), the proposed design can lead to a reduction in complexity of at least 23 % compared to conventional architect- tures.

Published
2013

27. Numerical Simulation of Two-dimensional Nonlinear Waves on Beaches Using a Smoothed Particle Hydrodynamics Method

Author

Cheolho Kim, Young-Gill Lee, and Kwang-Leol Jeong

Subjects
Physics, Smoothed-particle hydrodynamics, Nonlinear system, Piston, Classical mechanics, Continuity equation, Computer simulation, law, Computation, Fluidics, Mechanics, Circuit breaker, law.invention
Abstract

In this paper, wave breakers which occur in two dimensional coasts are simulated using a SPH(Smoothed Particle Hydrodynamics) method which represents the movement of fluidic physical volume with particles. As continuative fluid is approximated to the particles, the simulations are performed using fully Lagrangian method without any grid system. Two-dimensional Navier-Stokes equations and continuity equation are used for the numerical simulations. To generate incident waves, a piston type wavemaker is employed. The accuracy of the wave which is numerically generated by the wavemaker is verified by comparing with analytical results. The computations are carried out with various wave heights and slopes. The wave patterns generated through the numerical simulations are compared with several existing experimental and computational results. Agreement between the experimental data and the computation results is comparatively good. Also, the breaker depth index and the breaker height index from the present calculations are compared with the existing experimental results, and the tendency is very similar.

Published
2010

30. Liquid immersion thermal crosslinking of 3D polymer nanopatterns for direct carbonisation with high structural integrity

Author

Gyurim Park, Jun Hyuk Moon, Cheolho Kim, and Da-Young Kang

Subjects
chemistry.chemical_classification, Multidisciplinary, Materials science, Thermal resistance, chemistry.chemical_element, Polymer, Photoresist, Surface energy, Article, Chemical engineering, chemistry, Copolymer, Pyrolytic carbon, Porosity, Carbon
Abstract

The direct pyrolytic carbonisation of polymer patterns has attracted interest for its use in obtaining carbon materials. In the case of carbonisation of nanopatterned polymers, the polymer flow and subsequent pattern change may occur in order to relieve their high surface energies. Here, we demonstrated that liquid immersion thermal crosslinking of polymer nanopatterns effectively enhanced the thermal resistance and maintained the structure integrity during the heat treatment. We employed the liquid immersion thermal crosslinking for 3D porous SU8 photoresist nanopatterns and successfully converted them to carbon nanopatterns while maintaining their porous features. The thermal crosslinking reaction and carbonisation of SU8 nanopatterns were characterised. The micro-crystallinity of the SU8-derived carbon nanopatterns was also characterised. The liquid immersion heat treatment can be extended to the carbonisation of various polymer or photoresist nanopatterns and also provide a facile way to control the surface energy of polymer nanopatterns for various purposes, for example, to block copolymer or surfactant self-assemblies.

Published
2015

31. Facile fabrication of sub-100 nm mesoscale inverse opal films and their application in dye-sensitized solar cell electrodes

Author

Jaemin Lee, Chang-Yeol Cho, Jun Hyuk Moon, Jung Woo Lee, and Cheolho Kim

Subjects
Photocurrent, Multidisciplinary, Materials science, business.industry, Substrate (electronics), engineering.material, Colloidal crystal, Article, Dye-sensitized solar cell, Atomic layer deposition, Coating, Electrode, engineering, Optoelectronics, business, Mesoporous material
Abstract

Inverse opal (IO) films with mesoporous structures hold promise as high-performance electrodes for various photoelectrochemical devices because of their high specific area as well as their fully connected pore structure. A great challenge to their use is obtaining an intact film of mesoscale colloidal crystals as a template. Here, using the plate-sliding coating method coupled with hot air flow, we successfully deposited mesoscale colloidal crystals onto the substrate. A TiO2 mesoscale IO (meso-IO) with 70 nm pores was then successfully fabricated via atomic layer deposition of TiO2 and subsequent removal of the template. As a photoelectrochemical electrode, the meso-IO structure exhibits enhanced charge transport properties as well as a high specific area. Moreover, dye-sensitized solar cells fabricated using the meso-IO electrode exhibit a higher photocurrent and cell efficiency than a cell constructed using a conventional TiO2 nanoparticle electrode. This meso-IO film provides a new platform for developing electrodes for use in various energy storage and conversion devices.

Published
2014

32. Inside Cover: 3D Woven-Like Carbon Micropattern Decorated with Silicon Nanoparticles for Use in Lithium-Ion Batteries (ChemSusChem 20/2015)

Author

Cheolho Kim, Da-Young Kang, Donghee Gueon, Gyulim Park, Jun Hyuk Moon, Joong Kee Lee, and Jung Sub Kim

Subjects
Materials science, Silicon, General Chemical Engineering, Nanoparticle, chemistry.chemical_element, Nanotechnology, Energy storage, Ion, General Energy, chemistry, Environmental Chemistry, General Materials Science, Cover (algebra), Lithium, Carbon, Lithography
Published
2015

35. Facile fabrication of sub-100 nm mesoscale inverse opal films and their application in dye-sensitized solar cell electrodes.

Author

Jung Woo Lee, Lee, Jaemin, Cheolho Kim, Chang-Yeol Cho, and Jun Hyuk Moon

Subjects
DYE-sensitized solar cells, MESOPOROUS materials, COLLOIDAL crystals, ATOMIC layer deposition, ELECTROCHEMICAL electrodes
Abstract

Inverse opal (IO) films with meso-porous structures hold promise as high-performance electrodes for various photo electrochemical devices because of their high specific area as well as their fully connected pore structure. A great challenge to their use is obtaining an intact film of meso-scale colloidal crystals as a template. Here, using the plate-sliding coating method coupled with hot air flow, we successfully deposited mesoscale colloidal crystals onto the substrate. A TiO2 meso-scale IO (meso-IO) with 70 nm pores was then successfully fabricated via atomic layer deposition of TiO2 and subsequent removal of the template. As a photo electrochemical electrode, the meso-IO structure exhibits enhanced charge transport properties as well as a high specific area. Moreover, dye-sensitized solar cells fabricated using the meso-IO electrode exhibit a higher photocurrent and cell efficiency than a cell constructed using a conventional TiO2 nano-particle electrode. This meso-IO film provides a new platform for developing electrodes for use in various energy storage and conversion devices. [ABSTRACT FROM AUTHOR]

Published
2014
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36. Improvement in Endothelial Function by Angiotensin-converting Enzyme Inhibition and Vitamin C in Essential Hypertension

Author

Young Bae Park, Myoung Mook Lee, Dae Won Sohn, Woo Young Chung, Cheolho Kim, Young Keun On, Byung Hee Oh, Yun Shik Choi, and In Ho Chae

Subjects
medicine.medical_specialty, Endothelium, biology, business.industry, Vasodilation, Angiotensin-converting enzyme, Essential hypertension, medicine.disease, medicine.anatomical_structure, Endocrinology, medicine.artery, Internal medicine, ACE inhibitor, medicine, biology.protein, Enalapril, Brachial artery, Endothelial dysfunction, business, medicine.drug
Abstract

Background and Objectives:The endothelium plays an important role in maintaining vascular tone and function. This essential hypertension may be associated with alterations in endothelial function. The effects of antihypertensive agents on endothelial function have not been fully evaluated in human hypertension and data on the forearm circulation of humans is controversial. The aim of this study was 1 to evaluate endothelial function in hypertensive patients 2 to investigate whether vitamin C administration has a benefit on endothelial function and 3 to determine whether treatment with ACE inhibitor improve improves endothelial dysfunction in hypertensive patients. Materials and Methods:The endothelial function was estimated using venous occlusion plethysmography (VOP in 8 hypertensive patients and 8 healthy volunteers. The patients in the hypertension group were treated with enalapril, then reexamined. The change of forearm blood flow (FBF was measured under conditions of acetylcholine infusion through the brachial artery as well as with intra- arterial vitamin C. The measurement of forearm volume change was repeated 7 times for each stage. Results:The forearm blood flow response to acetylcholine was significantly enhanced with inra-arterial infusion of vitamin C in the hypertensive group before antihypertensive treatment (302±58%→446±43%. Co-infusion of L-NMMA, an inhibitor of nitric oxide synthase, the blunted forearm blood flow response to acetylcholine (Vit C (+; 446±43%→Vit C+L-NMMA;229±23%. After Following antihypertensive treatment with enalapril for 2 months in the hypertensive group, endothelium-dependent vasorelaxation (vasodilatory response to acetylcholine was significantly improved in the treated group as compared to mea- surements taken before enalapril treatment (302±58%→643±78%. Conclusions:Although the mechanisms leading to depressed endothelial function in essential hypertension remains to be elucidated, our study shows

Published
2001

37. A 3 DOF Model for an Electromagnetic Air Mount.

Author

Hyung Tae Kim, CheolHo Kim, SungBok Kang, KangWon Lee, JaeHo Baek, and HyunHee Han

Subjects
*DEGREES of freedom, *VIBRATION (Mechanics), *ELECTROMAGNETISM, *ISOLATORS (Engineering), *SEMICONDUCTORS, *SURFACE plates, *ELECTROMAGNETS
Abstract

A 4 × 4 matrix model with three degrees of freedom is proposed as a means for controlling microvibrations and applied to an electromagnetic isolator. The model was derived from an assumption based on small- and low-frequency vibrations. The coordinates of the 3 DOF was composed of the 4 variables, representing a vertical position, pitch, roll, and a proof term. The coordinates were calculated from the 4 position sensors in the isolator and formulated into a 4 × 4 matrix, which possesses inversive full rank. The electro-magnetic isolator was built for a simulated machine in semiconductormanufacturing and consisted of a heavy surface plate, sensors, amps, a controller, and air springs with electromagnets. The electromagnets are installed in a pneumatic chamber of the individual air spring. The performance of the 3 DOF model was experimented and compared with that of a 1 DOF model in an impact test. The settling time in the result was reduced to 25%. [ABSTRACT FROM AUTHOR]

Published
2012
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