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| 1 | Thermo-physical Characteristics of Nickel-coated Aluminum Powder as a Function of Particle Size and Oxidant显示文摘Aluminum particles 15–25 μm in size are widely used in fuel propellants and underwater propulsion systems in national defense research. However, these particles are covered with an aluminum oxide film, which has a high melting point, so ignition is difficult. To improve the ignitability of high-energy aluminum powder and to understand the reaction phenomenon as a function of particle size(15–25 μm, 74–105 μm, and 2.38 mm) and oxidizer(air, CO2, and argon), the natural oxide films are chemically removed. The particles are then coated with nickel using an electro-less method. The degree of nickel deposition is confirmed qualitatively and quantitatively through surface analysis using scanning electron microscopy/energy dispersive spectroscopy. To characterize the nickel coatings, elemental analysis is also conducted by using X-ray diffraction. Thermogravimetric analysis/differential scanning calorimetry(TGA/DSC) enable comparisons between the uncoated and coated aluminum, and the reaction process are investigated through fine structural analysis of the particle surfaces and cross sections. There are little difference in reactivity as a function of oxidant type. However, a strong exothermic reaction in the smaller nickel-coated aluminum particles near the melting point of aluminum accelerates the reaction of the smaller particles. Explanation of the reactivity of the nickel-coated aluminum depending on the particle sizes is attempted. | LEE Sanghyup NOH Kwanyoung LIM Jihwan YOON Woongsup | 2016 | Chinese Journal of Mechanical Engineering2016，29，6： | 3 |
| 2 | A Steam-Plasma Igniter for Aluminum Powder Combustion显示文摘High-temperature ignition is essential for the ignition and combustion of energetic metal fuels,including aluminum and magnesium particles which are protected by their highmelting-temperature oxides.A plasma torch characterized by an ultrahigh-temperature plasma plume fulfills such high-temperature ignition conditions.A new steam plasma igniter is designed and successfully validated by aluminum power ignition and combustion tests.The steam plasma rapidly stabilizes in both plasma and steam jet modes.Parametric investigation of the steam plasma jet is conducted in terms of arc strength.A high-speed camera and an oscilloscope method visualize the discharge characteristics,and optical emission spectroscopy measures the thermochemical properties of the plasma jet.The diatomic molecule OH fitting method,the Boltzmann plot method,and short exposure capturing with an intensified charge coupled device record the axial distributions of the rotational gas temperature,excitation temperature,and OH radical distribution,respectively.The excitation temperature at the nozzle tip is near 5500 K,and the gas temperature is 5400 K. | Sanghyup LEE Kwanyoung NOH Jihwan LIM Woongsup YOON | 2015 | Plasma Science and Technology2015，17，5： | 2 |
| 3 | Separation of tetra- hydrofuran and water using pressure swing distillation: Modeling and optimization 显示文摘 | Jihwan Lee Jungho Cho Dong Min Kim | 2011 | Korean J Chem Eng2011，28，2： | 1 |
| 4 | Evaluation of mechanical properties of steel-fiber reinforced concrete exposed to high temperatures by double-punch test 显示文摘 | Jihwan Kim Gyu-Phil Lee Do Young Moon | 2015 | Construction and Building Materials2015，79，： | 1 |
| 5 | Human embryonic stem cell-derived neural precursor transplants attenuate apomorphine-induced rotational behavior in rats with unilateral quinolinic acid lesions显示文摘 | Jihwan Song Soon-Tae Lee Wonsuk Kang Jung-Eun Park Kon Chu Song-ee Lee Taesun Hwang Hyungmin Chung Manho Kim | 2007 | Neuroscience Letters2007，，1： | 1 |
| 6 | Modeling and Optimization Study on the Separation of Acetone from Methanol through Pressure Swing Distillation 显示文摘 | Alyssa Marie Fulgueras Dong Sun Kim Jihwan Lee Jungho Cho | 2008 | Book of Abstracts of the 12th Asian Pacific Confederation of Chemical Engineering Congress (Vol 2 Environment and Green Processing)2008，，08： | 1 |
| 7 | Separation of tetrahydrofuran and water using pressure swing distillation:Modeling and optimization显示文摘 | Lee Jihwan Cho Jungho Kim Dong Min | | 0，，02： | 1 |
| 8 | Impact of Korean Ginseng (Panax Ginseng) on Power Generation of Microbial Fuel Cells显示文摘 | Wonjae Kim Peter Lee Thomas W. Kim George Kim Jonathan Sukhee Chung Jihwan Alex. Joo Sung-Jae Chung | 2015 | Journal of Chemistry and Chemical Engineering2015，9，7： | 1 |
| 9 | Separation of Tetrahydrofuran and Water Using Pressure Swing Distillation:Modeling and Optimization显示文摘 | Lee Jihwan Cho Jungho Kim Dongmin | 2011 | Korean J Chem Eng2011，28，2： | 1 |
| 10 | All-fiber acousto-optic modulator based on a cladding-etched optical fiber for active mode-locking显示文摘An all-fiber acousto-optic modulator(AOM), which features a compact structure and a low-driving voltage, is experimentally demonstrated for the active mode-locking of a fiber laser. The proposed AOM is based on the short length of the cladding-etched fiber, the ends of which are fixed on a slide glass. On top of the cladding-etched fiber, a piezoelectric transducer was overlaid. A chemical wet-etching technique, which is based on a mixed solution of NH_4F and (NH_4)2SO_4, is used to reduce the fiber diameter down to ~25 μm, and the length of the etched section is only 0.5 cm. The fabricated device exhibited a modulation depth of 73.10% at an acoustic frequency of 918.9 kHz and a peak-to-peak electrical voltage of 10 V, while a laser beam was coupled at 1560 nm.By using the prepared AOM within an erbium-doped-fiber ring cavity, the mode-locked pulses with a temporalwidth of 2.66 ps were readily obtained at a repetition rate of 1.838 MHz. | JIHWAN KIM JOONHOI KOO JU HAN LEE | 2017 | Photonics Research2017，5，5： | 0 |
| 11 | Diagnosis of Middle Ear Diseases Based on Convolutional Neural Network显示文摘An otoscope is traditionally used to examine the eardrum and ear canal.A diagnosis of otitis media(OM)relies on the experience of clinicians.If an examiner lacks experience,the examination may be difficult and time-consuming.This paper presents an ear disease classification method using middle ear images based on a convolutional neural network(CNN).Especially the segmentation and classification networks are used to classify an otoscopic image into six classes:normal,acute otitis media(AOM),otitis media with effusion(OME),chronic otitis media(COM),congenital cholesteatoma(CC)and traumatic perforations(TMPs).The Mask R-CNN is utilized for the segmentation network to extract the region of interest(ROI)from otoscopic images.The extracted ROIs are used as guiding features for the classification.The classification is based on transfer learning with an ensemble of two CNN classifiers:EfficientNetB0 and Inception-V3.The proposed model was trained with a 5-fold cross-validation technique.The proposed method was evaluated and achieved a classification accuracy of 97.29%. | Yunyoung Nam Seong Jun Choi Jihwan Shin Jinseok Lee | 2023 | Computer Systems Science & Engineering2023，46，8： | 0 |
| 12 | 一例慢性丙肝患者在达卡他韦和阿那匹韦联合治疗期间出现慢加急性肝衰竭从而接受肝移植治疗显示文摘We report a case with hepatitis C virus genotype 1 b liver cirrhosis who received liver transplantation because of acute-onchronic liver failure during daclatasvir(DSV)and asunaprevir(ASV)combination therapy.To our knowledge,this is the first case received liver transplantation during DSVtASV therapy.Therefore,clinicians should pay particular attention to the possibility of acute liver failure during DSV and ASV combination therapy. | Wonhyeong Park Jihwan Jung Soo Hyun Yang Danbi Lee Hyo Jeong Kang | 2019 | Gastroenterology Report2019，7，5： | 0 |
| 13 | An Efficient and Spam-Robust Proximity Measure Between Communication Entities显示文摘Electronic communication service providers are obliged to retain communication data for a certain amount of time by their local laws. The retained communication data or the communication logs are used in various applications such as crime detection, viral marketing, analytical study, and so on. Many of these applications rely on effective techniques for analyzing communication logs. In this paper, we focus on measuring the proximity between two communication entities, which is a fundamental and important step toward further analysis of communication logs, and propose a new proximity measure called ESP (Efficient and Spam-Robust Proximity measure). Our proposed measure considers only the (graph-theoretically) shortest paths between two entities and gives small values to those between spam-like entities and others. Thus, it is not only computationally efficient but also spam-robust. By conducting several experiments on real and synthetic datasets, we show that our proposed proximity measure is more accurate, computationally efficient and spam-robust than the existing measures in most cases. | Joo Hyuk Jeon Jihwan Song Jeong Eun Kwon Yoon Joon Lee Man Ho Park Myoung Ho Kim | 2013 | Journal of Computer Science & Technology2013，28，2： | 0 |
| 14 | Complete recovery from segmental zoster paresis confirmed by magnetic resonance imaging:A case report显示文摘BACKGROUND Segmental zoster paresis,depending on the affected area,can present with severe clinical manifestations and render patients unable to perform activities of daily living.Therefore,it is necessary to diagnose and treat such a condition rapidly.No studies have reported using magnetic resonance imaging(MRI)to identify clinical abnormalities associated with this condition or its complete recovery.This rare case report evaluated the changes in MRI findings before and after the patient’s motor symptoms recovered.CASE SUMMARY A 79-year-old woman with a history of rheumatoid arthritis and psoriasis visited the hospital for skin rashes and pain in the C5-T2 segments.The diagnosis was herpes zoster infection,and treatment was initiated.However,motor weakness suddenly occurred 14 d after the initial symptom presentation.We confirmed abnormal findings in the nerves and muscles invaded by the shingles using electromyography and MRI.After 17 mo,the patient’s symptoms had completely normalized,and MRI confirmed that there were no abnormalities.CONCLUSION MRI can be a useful diagnostic modality for segmental zoster paresis and patient evaluation during recovery from motor complications. | Jihwan Park Wooyong Lee Yunhee Lim | 2022 | World Journal of Clinical Cases2022，10，26： | 0 |
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