Works matching AU CHOI, DONG HOON

Results: 117

Synthesis and Optical Nonlinearity of Thermally Stable Polyimides Incorporated with Electro-Optic Chromophore as Side Chain.

Published in:

Macromolecular Symposia, 2007, v. 249-250, n. 1, p. 21, doi. 10.1002/masy.200750304

By:

Ju, Hyun Kyung;
Lim, Jong Sun;
Yoon, Sung Cheol;
Lee, Changjin;
Choi, Dong Hoon;
Park, Seung Ku;
Kim, Dong Wook

Publication type:

Article

p-Type Semiconducting Dendrimers Bearing Thiophenyl Peripheral Moieties: Effect of Alkyl Chains on Molecular Packing Geometry.

Published in:

Macromolecular Symposia, 2007, v. 249-250, n. 1, p. 1, doi. 10.1002/masy.200750301

By:

Kim, Kyung Hwan;
Chi, Zhenguo;
Cho, Min Ju;
Jin, Jung-Il;
Choi, Dong Hoon;
Paek, Sang Hyon

Publication type:

Article

Electroluminescence of Phenothiazine-Labeled Dendrimer Encapsulated 2-{2-[2-(4-Dimethylamino-phenyl)-vinyl]-6-methyl-pyran-4-ylidene}-Malononitrile Derivative: Effect of the Density of Phenothiazine Dendron.

Published in:

Macromolecular Symposia, 2006, v. 245-246, n. 1, p. 423, doi. 10.1002/masy.200651360

By:

Kim, Go Woon;
Cho, Min Ju;
Jin, Jung-Il;
Choi, Dong Hoon;
Paek, Sang Hyon

Publication type:

Article

Enhanced Performance of Organic Photovoltaic Cells Fabricated with a Methyl Thiophene-3-Carboxylate-Containing Alternating Conjugated Copolymer.

Published in:

Macromolecular Rapid Communications, 2012, v. 33, n. 2, p. 146, doi. 10.1002/marc.201100501

By:

Cho, Min Ju;
Seo, Jangwon;
Kim, Kyung Hwan;
Choi, Dong Hoon;
Prasad, Paras N.

Publication type:

Article

Poly(2,5-thienylene vinylene) in Nano Shapes by CVD Polymerization.

Published in:

Macromolecular Rapid Communications, 2007, v. 28, n. 9, p. 1057, doi. 10.1002/marc.200700004

By:

Lee, Ki-Ryong;
Yu, Young-Jun;
Joo, Sung-Hoon;
Lee, Chun-Young;
Choi, Dong Hoon;
Joo, Jin Soo;
Park, Young-Sup;
Jin, Jung-Il

Publication type:

Article

Asymmetric Host Molecule Bearing Pyridine Core for Highly Efficient Blue Thermally Activated Delayed Fluorescence OLEDs.

Published in:

Chemistry - A European Journal, 2020, v. 26, n. 69, p. 16383, doi. 10.1002/chem.202002655

By:

Yoon, Jiwon;
Kim, Seong Keun;
Kim, Hyung Jong;
Choi, Suna;
Jung, Sang Won;
Lee, Hyuna;
Kim, Jun Yun;
Yoon, Dae‐Wi;
Han, Chang Wook;
Chae, Weon‐Sik;
Kwon, Jang Hyuk;
Cho, Min Ju;
Choi, Dong Hoon

Publication type:

Article

Clinical and serological predictors for the recurrence of atrial fibrillation after electrical cardioversion.

Published in:

EP: Europace, 2009, v. 11, n. 12, p. 1632, doi. 10.1093/europace/eup321

By:

Kim, Sook Kyoung;
Pak, Hui-Nam;
Park, Jae Hyung;
Ko, Kyoung Jeong;
Lee, Jihei Sara;
Choi, Jong Il;
Choi, Dong Hoon;
Kim, Young-Hoon

Publication type:

Article

Liquid-Immersion Reprocessing Effects on Filtration Efficiency of 'Single-Use' Commercial Medical Face Masks.

Published in:

Annals of Work Exposures & Health, 2022, v. 66, n. 2, p. 246, doi. 10.1093/annweh/wxab079

By:

Everts, Richard J;
Ghusaini, Shadha Al;
Telfar-Barnard, Lucy;
Barclay, Ella;
Tan, Shaun;
Jekel, Sonja;
Jennings, Lance;
Choi, Dong Hoon;
Hilson, Dougal;
Gibson, Barbara

Publication type:

Article

Improved technical success and midterm patency with subintimal angioplasty compared to intraluminal angioplasty in long femoropopliteal occlusions.

Published in:

2007

By:

Ko YG;
Kim JS;
Choi DH;
Jang Y;
Shim WH;
Ko, Young-Guk;
Kim, Jung-Sun;
Choi, Dong-Hoon;
Jang, Yangsoo;
Shim, Won-Heum

Publication type:

journal article

Colloidal Perovskite Nanocrystals for Blue‐Light‐Emitting Diodes and Displays.

Published in:

Advanced Science, 2025, v. 12, n. 15, p. 1, doi. 10.1002/advs.202409736

By:

Aftabuzzaman, Md;
Hong, Yongju;
Jeong, Sangyeon;
Levan, Ratiani;
Lee, Seung Jin;
Choi, Dong Hoon;
Lee, Kwangyeol

Publication type:

Article

Perovskite Nanocrystals Protected by Hermetically Sealing for Highly Bright and Stable Deep‐Blue Light‐Emitting Diodes.

Published in:

Advanced Science, 2023, v. 10, n. 23, p. 1, doi. 10.1002/advs.202302906

By:

Hong, Yongju;
Yu, Chungman;
Je, Hyeondoo;
Park, Jin Young;
Kim, Taekyung;
Baik, Hionsuck;
Tomboc, Gracita M.;
Kim, Youngseo;
Ha, Jung Min;
Joo, Jinwhan;
Kim, Chai Won;
Woo, Han Young;
Park, Sungnam;
Choi, Dong Hoon;
Lee, Kwangyeol

Publication type:

Article

Multilayered electrospun fibrous meshes for restenosis-suppressing metallic stents.

Published in:

Journal of Biomedical Materials Research, Part B: Applied Biomaterials, 2017, v. 105, n. 3, p. 628, doi. 10.1002/jbm.b.33583

By:

Son, Young Ju;
Kim, Hye Sung;
Choi, Dong Hoon;
Yoo, Hyuk Sang

Publication type:

Article

Potential association between coronary artery disease and the inflammatory biomarker YKL-40 in asymptomatic patients with type 2 diabetes mellitus.

Published in:

Cardiovascular Diabetology, 2012, v. 11, n. 1, p. 84, doi. 10.1186/1475-2840-11-84

By:

Hyun Min Kim;
Byung-Wan Lee;
Young-Mi Song;
Won Jin Kim;
Hyuk-Jae Chang;
Dong-Hoon Choi;
Hee Tae Yu;
EunSeok Kang;
Bong Soo Cha;
Hyun Chul Lee

Publication type:

Article

Robust design optimization of an angular contact ball bearing under manufacturing tolerance.

Published in:

Structural & Multidisciplinary Optimization, 2019, v. 60, n. 4, p. 1645, doi. 10.1007/s00158-019-02335-2

By:

Kang, Kibong;
Kim, Seung-Wook;
Yoon, Kichan;
Choi, Dong-Hoon

Publication type:

Article

Efficient progressive polynomial approximate optimization.

Published in:

Structural & Multidisciplinary Optimization, 2018, v. 58, n. 4, p. 1783, doi. 10.1007/s00158-018-1997-0

By:

Ryu, Dong-Heum;
Lee, Yongbin;
Choi, Dong-Hoon

Publication type:

Article

Surrogate-based global optimization using an adaptive switching infill sampling criterion for expensive black-box functions.

Published in:

Structural & Multidisciplinary Optimization, 2018, v. 57, n. 4, p. 1443, doi. 10.1007/s00158-018-1942-2

By:

Chung, In-Bum;
Park, Dohyun;
Choi, Dong-Hoon

Publication type:

Article

Comparison study of sampling methods for computer experiments using various performance measures.

Published in:

Structural & Multidisciplinary Optimization, 2017, v. 55, n. 1, p. 221, doi. 10.1007/s00158-016-1490-6

By:

Cho, Inyong;
Lee, Yongbin;
Ryu, Dongheum;
Choi, Dong-Hoon

Publication type:

Article

Synthesis of a new wide-bandgap conjugated copolymer with 3-trifluoromethylthiophene monomer and Its application to non-fullerene polymer solar cells.

Published in:

Molecular Crystals & Liquid Crystals, 2019, v. 686, n. 1, p. 30, doi. 10.1080/15421406.2019.1648033

By:

Pitchamuthu, Amaladass;
Park, Chang Geun;
Park, Su Hong;
Cho, Min Ju;
Choi, Dong Hoon

Publication type:

Article

Diketopyrrolopyrrole-based three-armed conjugated small molecule and their charge transport property.

Published in:

Molecular Crystals & Liquid Crystals, 2016, v. 635, n. 1, p. 80, doi. 10.1080/15421406.2016.1200363

By:

Kim, Hyung Jong;
Kim, Jae Yoon;
Um, Hyun Ah;
Shin, Jicheol;
Cho, Min Ju;
Choi, Dong Hoon

Publication type:

Article

Synthesis and Characterization of New Dibenzothiophene-based Host Materials for Blue Phosphorescent Organic Light-Emitting Diodes.

Published in:

Molecular Crystals & Liquid Crystals, 2015, v. 621, n. 1, p. 31, doi. 10.1080/15421406.2015.1095835

By:

Jong Kim, Hyung;
Choe, Ik Rang;
Hong, Tae Ryang;
Kang, Ju Sik;
Um, Hyun Ah;
Cho, Min Ju;
Choi, Dong Hoon

Publication type:

Article

Annealing-Free High-Mobility Diketopyrrolopyrrole-Benzodithiophene Copolymer for Organic Thin Film Transistors.

Published in:

Molecular Crystals & Liquid Crystals, 2014, v. 598, n. 1, p. 97, doi. 10.1080/15421406.2014.933304

By:

Lee, Dae Hee;
Shin, Jicheol;
Lee, Tae Wan;
Cho, Min Ju;
Choi, Dong Hoon

Publication type:

Article

Organic Donor-σ-Acceptor Molecules Based on 5,5′-(9,10-Bis((4-hexylphenyl)ethynyl)anthracene-2,6-diyl)bis(ethyne-2,1-diyl)bis(2-hexylthiophene) for Resistive Random Access Memory.

Published in:

Molecular Crystals & Liquid Crystals, 2013, v. 580, n. 1, p. 95, doi. 10.1080/15421406.2013.807723

By:

Lee, Tae Wan;
Shin, Jicheol;
Kim, Kyung Hwan;
Cho, Min Ju;
Choi, Dong Hoon

Publication type:

Article

Exploiting GPUs in Virtual Machine for Bio Cloud.

Published in:

BioMed Research International, 2013, v. 2013, p. 1, doi. 10.1155/2013/939460

By:

Heeseung Jo;
Jinkyu Jeong;
Myoungho Lee;
Dong Hoon Choi

Publication type:

Article

Mapping the broadband circular dichroism of copolymer films with supramolecular chirality in time and space.

Published in:

Nature Communications, 2022, v. 13, n. 1, p. 1, doi. 10.1038/s41467-021-27886-1

By:

Morgenroth, Marius;
Scholz, Mirko;
Cho, Min Ju;
Choi, Dong Hoon;
Oum, Kawon;
Lenzer, Thomas

Publication type:

Article

Numerical Shape Optimization for High Performance of a Heat Sink with Pin-Fins.

Published in:

Numerical Heat Transfer: Part A -- Applications, 2004, v. 46, n. 9, p. 909, doi. 10.1080/104077890503934

By:

Park, Kyoungwoo;
Choi, Dong-Hoon;
Lee, Kwan-Soo

Publication type:

Article

OPTIMUM DESIGN OF PLATE HEAT EXCHANGER WITH STAGGERED PIN ARRAYS.

Published in:

Numerical Heat Transfer: Part A -- Applications, 2004, v. 45, n. 4, p. 347, doi. 10.1080/10407780490250391

By:

Park, Kyoungwoo;
Choi, Dong-Hoon;
Lee, Kwan-Soo

Publication type:

Article

Natural Form of Noncytolytic Flexible Human Fc as a Long-Acting Carrier of Agonistic Ligand, Erythropoietin.

Published in:

PLoS ONE, 2011, v. 6, n. 9, p. 1, doi. 10.1371/journal.pone.0024574

By:

Se Jin Im;
Sang In Yang;
Se Hwan Yang;
Dong Hoon Choi;
So Young Choi;
Hea Sook Kim;
Do Soo Jang;
Kyeong Sik Jin;
Yo-Kyung Chung;
Seung-Hee Kim;
Sang Hoon Paik;
Yoo Chang Park;
Moon Koo Chung;
Yong Bum Kim;
Kang-Hyun Han;
Kwan Yong Choi;
Young Chul Sung

Publication type:

Article

Synthesis of gold nanoparticles supported at graphene derivatives using green reductants and evaluation of their catalytic activity in 4-nitrophenol reduction.

Published in:

Gold Bulletin, 2019, v. 52, n. 3/4, p. 165, doi. 10.1007/s13404-019-00258-w

By:

Choi, Dong Hoon;
Hong, Jee Eun;
Jung, Yeonghun;
In Park, Hye;
Baek, Seung Tae;
Kim, Su Jeong;
Lee, Chan Gook;
Park, Youmie;
Park, Seok Ju;
Park, Yohan

Publication type:

Article

Macromol. Chem. Phys. 17/2009.

Published in:

Macromolecular Chemistry & Physics, 2009, v. 210, n. 17, p. n/a, doi. 10.1002/macp.200990038

By:

Kim, Kyu-Nam;
Kwon, Young-Wan;
Choi, Dong Hoon;
Jin, Jung-Il

Publication type:

Article

Selective Fluorescence Quenching by Group 8 Metal Ions of a Water-Soluble Poly( p-phenylene vinylene) Derivative Bearing Oligo(oxyethylene) Pendants.

Published in:

Macromolecular Chemistry & Physics, 2009, v. 210, n. 17, p. 1372, doi. 10.1002/macp.200900088

By:

Kim, Kyu-Nam;
Kwon, Young-Wan;
Choi, Dong Hoon;
Jin, Jung-Il

Publication type:

Article

An Unsymmetrically π-Extended Porphyrin-Based Single-Crystal Field-Effect Transistor and Its Anisotropic Carrier-Transport Behavior.

Published in:

Chemistry - A European Journal, 2013, v. 19, n. 7, p. 2247, doi. 10.1002/chem.201202894

By:

Choi, Soojung;
Chae, Seung Hyun;
Hoang, Mai Ha;
Kim, Kyung Hwan;
Huh, Jung A;
Kim, Youngmee;
Kim, Sung‐Jin;
Choi, Dong Hoon;
Lee, Suk Joong

Publication type:

Article

High-Performance Single-Crystal-Based Organic Field-Effect Transistors from π-Extended Porphyrin Derivatives.

Published in:

Chemistry - A European Journal, 2011, v. 17, n. 28, p. 7772, doi. 10.1002/chem.201100599

By:

Hoang, Mai Ha;
Kim, Youngmee;
Kim, Sung-Jin;
Choi, Dong Hoon;
Lee, Suk Joong

Publication type:

Article

Complementary Absorbing Star-Shaped Small Molecules for the Preparation of Ternary Cascade Energy Structures in Organic Photovoltaic Cells.

Published in:

Advanced Functional Materials, 2013, v. 23, n. 12, p. 1556, doi. 10.1002/adfm.201201913

By:

Cha, Hyojung;
Chung, Dae Sung;
Bae, Suk Young;
Lee, Min‐Jung;
An, Tae Kyu;
Hwang, Jihun;
Kim, Kyung Hwan;
Kim, Yun‐Hi;
Choi, Dong Hoon;
Park, Chan Eon

Publication type:

Article

Ultrathin, Organic, Semiconductor/Polymer Blends by Scanning Corona-Discharge Coating for High-Performance Organic Thin-Film Transistors.

Published in:

Advanced Functional Materials, 2010, v. 20, n. 17, p. 2903, doi. 10.1002/adfm.201000032

By:

Jung, Hee Joon;
Shin, Yu Jin;
Park, Youn Jung;
Yoon, Sung Cheol;
Choi, Dong Hoon;
Park, Cheolmin

Publication type:

Article

Non-volatile Ferroelectric Poly(vinylidene fluoride- co-trifluoroethylene) Memory Based on a Single-Crystalline Tri-isopropylsilylethynyl Pentacene Field-Effect Transistor.

Published in:

Advanced Functional Materials, 2009, v. 19, n. 10, p. 1609, doi. 10.1002/adfm.200801097

By:

Kang, Seok Ju;
Bae, Insung;
Park, Youn Jung;
Park, Tae Ho;
Sung, Jinwoo;
Yoon, Sung Cheol;
Kim, Kyung Hwan;
Choi, Dong Hoon;
Park, Cheolmin

Publication type:

Article

Cover Picture: Highly Sensitive, Photocontrolled, Organic Thin-Film Transistors Using Soluble Star-shaped Conjugated Molecules (Adv. Funct. Mater. 19/2008).

Published in:

Advanced Functional Materials, 2008, v. 18, n. 19, p. n/a, doi. 10.1002/adfm.200890076

By:

Cho, Mi Yeon;
Kim, Su Jin;
Han, Yoon Deok;
Park, Dong Hyuk;
Kim, Kyung Hwan;
Choi, Dong Hoon;
Joo, Jinsoo

Publication type:

Article

Highly Sensitive, Photocontrolled, Organic Thin-Film Transistors Using Soluble Star-shaped Conjugated Molecules.

Published in:

Advanced Functional Materials, 2008, v. 18, n. 19, p. 2905, doi. 10.1002/adfm.200800358

By:

Cho, Mi Yeon;
Kim, Su Jin;
Han, Yoon Deok;
Park, Dong Hyuk;
Kim, Kyung Hwan;
Choi, Dong Hoon;
Joo, Jinsoo

Publication type:

Article

Out-of-clinic measurement of sweat chloride using a wearable sensor during low-intensity exercise.

Published in:

NPJ Digital Medicine, 2020, v. 3, n. 1, p. 1, doi. 10.1038/s41746-020-0257-z

By:

Choi, Dong-Hoon;
Kitchen, Grant B.;
Jennings, Mark T.;
Cutting, Garry R.;
Searson, Peter C.

Publication type:

Article

Gender Differences in Clinical Features and In-hospital Outcomes in ST-segment Elevation Acute Myocardial Infarction: From the Korean Acute Myocardial Infarction Registry (KAMIR) Study.

Published in:

Clinical Cardiology, 2010, v. 33, n. 8, p. E1, doi. 10.1002/clc.20557

By:

Park, Jong-Seon;
Kim, Young-Jo;
Shin, Dong-Gu;
Jeong, Myung-Ho;
Ahn, Young-Keun;
Chung, Wook-Sung;
Seung, Ki-Bae;
Kim, Chong-Jin;
Cho, Myeong-Chan;
Jang, Yang-Soo;
Park, Seung-Jung;
Seong, In-Whan;
Chae, Shung-Chull;
Hur, Seung-Ho;
Choi, Dong-Hoon;
Hong, Taek-Jong

Publication type:

Article

Marked enhancement of antigen-specific T-cell responses by IL-7-fused nonlytic, but not lytic, Fc as a genetic adjuvant.

Published in:

European Journal of Immunology, 2010, v. 40, n. 2, p. 351, doi. 10.1002/eji.200939271

By:

Nam, Hyo Jung;
Song, Mi-Young;
Choi, Dong-Hoon;
Yang, Se-Hwan;
Jin, Hyun-Tak;
Sung, Young-Chul

Publication type:

Article

Shape optimization of mobile phone folder module for structural strength.

Published in:

Journal of Mechanical Science & Technology, 2012, v. 26, n. 2, p. 509, doi. 10.1007/s12206-011-1212-3

By:

Lee, Gabseong;
Park, Jeongseok;
Choi, Dong-Hoon

Publication type:

Article

Multi-objective structural optimization of a HAWT composite blade based on ultimate limit state analysis.

Published in:

Journal of Mechanical Science & Technology, 2012, v. 26, n. 1, p. 129, doi. 10.1007/s12206-011-1018-3

By:

Hu, Weifei;
Han, Insik;
Park, Sang-Chul;
Choi, Dong-Hoon

Publication type:

Article

Efficacy and safety of fixed-dose combination therapy with olmesartan medoxomil and rosuvastatin in Korean patients with mild to moderate hypertension and dyslipidemia: an 8-week, multicenter, randomized, double-blind factorial-design study (OLSTA-D RCT: OLmesartan rosuvaSTAtin from Daewoong).

Published in:

Drug Design, Development & Therapy, 2016, v. 10, p. 2599, doi. 10.2147/DDDT.S112873

By:

Jin-Sun Park;
Joon-Han Shin;
Taek-Jong Hong;
Hong-Seog Seo;
Wan-Joo Shim;
Sang-Hong Baek;
Jin-Ok Jeong;
Youngkeun Ahn;
Woong-Chol Kang;
Young-Hak Kim;
Sang-Hyun Kim;
Min-Su Hyon;
Dong-Hoon Choi;
Chang-Wook Nam;
Tae-Ho Park;
Sang-Chol Lee;
Hyo-Soo Kim

Publication type:

Article

Effects of sub-antimicrobial dose doxycycline therapy on crevicular fluid MMP-8, and gingival tissue MMP-9, TIMP-1 and IL-6 levels in chronic periodontitis.

Published in:

Journal of Periodontal Research, 2004, v. 39, n. 1, p. 20, doi. 10.1111/j.1600-0765.2004.00696.x

By:

Choi, Dong‐Hoon;
Moon, Ik‐Sang;
Choi, Bong‐Kyu;
Paik, Jeong‐Won;
Kim, Yoon‐Sik;
Choi, Seong‐Ho;
Kim, Chong‐Kwan

Publication type:

Article

Photoactive polyamideimides synthesized by the polycondensation of azo-dye diamines and rosin derivative.

Published in:

Journal of Applied Polymer Science, 2001, v. 79, n. 4, p. 687, doi. 10.1002/1097-4628(20010124)79:4<687::AID-APP130>3.0.CO;2-9

By:

Kim, Seung Ju;
Kim, Beom Jun;
Jang, Dong Wook;
Kim, Se Hun;
Park, Soo Young;
Lee, Ju-Hyun;
Lee, Sin-Doo;
Choi, Dong Hoon

Publication type:

Article

Deep learning for development of organic optoelectronic devices: efficient prescreening of hosts and emitters in deep-blue fluorescent OLEDs.

Published in:

NPJ Computational Materials, 2022, v. 8, n. 1, p. 1, doi. 10.1038/s41524-022-00834-3

By:

Jeong, Minseok;
Joung, Joonyoung F.;
Hwang, Jinhyo;
Han, Minhi;
Koh, Chang Woo;
Choi, Dong Hoon;
Park, Sungnam

Publication type:

Article

Deep learning for development of organic optoelectronic devices: efficient prescreening of hosts and emitters in deep-blue fluorescent OLEDs.

Published in:

NPJ Computational Materials, 2022, v. 8, n. 1, p. 1, doi. 10.1038/s41524-022-00834-3

By:

Jeong, Minseok;
Joung, Joonyoung F.;
Hwang, Jinhyo;
Han, Minhi;
Koh, Chang Woo;
Choi, Dong Hoon;
Park, Sungnam

Publication type:

Article

Dual Growth Factor Delivery Using Biocompatible Core-Shell Microcapsules for Angiogenesis.

Published in:

Small, 2013, v. 9, n. 20, p. 3468, doi. 10.1002/smll.201300427

By:

Choi, Dong Hoon;
Subbiah, Ramesh;
Kim, Ik Hwan;
Han, Dong Keun;
Park, Kwideok

Publication type:

Article

Thermally stable maleimide copolymer for second-order nonlinear optics.

Published in:

Journal of Applied Polymer Science, 1996, v. 59, n. 1, p. 9, doi. 10.1002/(SICI)1097-4628(19960103)59:1<9::AID-APP2>3.0.CO;2-Y

By:

Choi, Dong Hoon;
Song, Sangyup;
Lee, Taek Seung;
Park, Soo Young;
Kim, Nakjoong

Publication type:

Article

A Carbazole Based Bimodal "Turn-On" Fluorescent Probe for Biothiols (Cysteine/Homocysteine) and Fluoride: Sensing, Imaging and its Applications.

Published in:

Bulletin of the Korean Chemical Society, 2014, v. 35, n. 12, p. 3437, doi. 10.5012/bkcs.2014.35.12.3437

By:

Matinder Kaur;
Byungkwon Yoon;
Rajesh Kumar;
Min Ju Cho;
Hak Joong Kim;
Jong Seung Kim;
Dong Hoon Choi

Publication type:

Article