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Characteristics and Application of Conducting Polymer Sensor

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稀有金属材料与工程 2006年第A3期35卷 479-482页

作者： joon-Boo Yu Jeung-soo Huh Department of Material Science and Metallurgy Kyungpook National UniversityDaegu 702-701Korea

Conducting polymers sensors have been very interesting that it can detect wide variety of functionalities,however these materials have to solve humidity contaminant,poor reversibility and *** improve this problems,we investigated pretreatment such as soaking in methanol and thermal treatment in N_*** process improved stability, reversibility and response time and recovery *** overcome humidity contaminant coated hydrophobic polymer was reduced above 50% at RH10%.For sensor array structure was fabricated for enhancing selectivity of gas *** polymer sensor array had several application in environmental and medical science the method of principal component analysis.

关键词： conducting polymer VOCs gas sensor

Fe_(3)GeTe_(2):a site-differentiated Hund metal

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npj Computational Materials 2022年第1期8卷 2355-2360页

作者： Taek Jung Kim Siheon Ryee Myung joon han Department of Physics KAISTDaejeon34141Republic of Korea I.Institute of Theoretical Physics University of HamburgNotkestrasse 9-11Hamburg22607Germany

Magnetism in two-dimensional(2D)van der Waals(vdW)materials has lately attracted considerable attention from the point of view of both fundamental science and device ***,establishing a detailed and solid understanding of their magnetism is the key first step toward various *** Fe_(3)GeTe_(2)is a representative ferromagnetic(FM)metal in this family,many aspects of its magnetic and electronic behaviors still remain ***,we report our new finding that Fe_(3)GeTe_(2)is a special type of correlated metal known as“Hund metal”.Furthermore,we demonstrate that Hund metallicity in this material is quite unique by exhibiting remarkable site dependence of Hund correlation strength,hereby dubbed“site-differentiated Hund metal”.Within this new picture,many of the previous experiments can be clearly understood,including the ones that were seemingly contradictory to one another.

关键词： strength establishing metallic

Macrophage activation syndrome in children with Kawasaki disease: diagnostic and therapeutic approaches

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World Journal of Pediatrics 2020年第6期16卷 566-574页

作者： Seung Beom han soo-Young Lee Department of Pediatrics Daejeon St.Mary's Hospital.College of MedicineThe Catholic University of Korea64 Daeheung-ro.Jung-guDaejeon 34943Republic of Korea Department of Pediatrics.Bucheon St.Mary's Hospital College of MedicineThe Catholic University of Korea327 Sosa-roWonmi-gu.Bucheon 14647Republic of Korea

Background Macrophage activation syndrome(MAS)is a rare,life-threatening complication of Kawasaki disease(KD).Early recognition and treatment of MAS are very important,but sometimes it is difficult to distinguish MAS from a severe form of *** sources A PubMed search was performed in Clinical Queries using the key terms“macrophage activation syndrome or secondary hemophagocytic lymphohistiocytosis(HLH)”and“Kawasaki disease”.Results KD patients with MAS show high intravenous immunoglobulin(IVIG)resistance and coronary *** is also as high as MAS in other *** fever greater than 10 days is highly associated with development of MAS in *** is observed in more than two-thirds of KD patients with *** is often the earliest laboratory finding of *** is highly specific and sensitive for detecting MAS in KD;so,ferritin levels should be checked if there are unexplained clinical exacerbations in KD *** the under-recognition of MAS in KD,it is prudent to consider resistant KD as occult/subclinical *** KD patients with MAS have good outcomes on immune ***,if KD patients fulfill the HLH-2004 diagnostic criteria,they may undergo longer and more intensive treatment than *** The possible existence of MAS should be taken into account when a KD patient shows persistent fever,splenomegaly,thrombocytopenia,hyperferritinemia,or IVIG *** under-diagnosis of MAS in patients with KD is an important issue to be ***,however,there is a possibility of over-treatment of MAS in patients with KD.

关键词： Macrophage activation syndrome Kawasaki disease Children

Study on frictional behavior of carbon nanotube thin films with respect to surface condition

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Friction 2018年第4期6卷 432-442页

作者： Youn-Hoo HWANG Byung-soo MYUNG Hyun-joon KIM Department of Precision Mechanical Engineering Kyungpook National University

In this work, tribological characteristics of thin films composed of entangled carbon nanotubes(CNTs) were investigated. The surface roughness of CNT thin films fabricated via a dip‐coating process was controlled by squeezing during the process with an applied normal force ranging from 0 to 5 kgf. Raman spectra and scanning electron microscopy(SEM) images of the thin films were obtained to estimate the influence of the squeezing process on the crystallinity of the CNTs. The analysis revealed that squeezing could reduce surface roughness, while preserving the crystallinity of the CNTs. Moreover, the surface energy of the cover glass used to press the CNT thin film was found to be the critical factor controlling surface roughness. A micro‐tribometer and macro‐tribometer were used to assess the tribological characteristics of the CNT thin film. The results of the tribotest exhibited a correlation between the friction coefficient and surface roughness. Dramatic changes in friction coefficient could be observed in the micro‐tribotest, while changes in friction coefficient in the macro‐tribotest were not significant.

关键词： carbon nanotubes friction surface roughness surface energy squeezing process UV irradiation

A Kinetic Study on the Control of Nitrogen in Molten Slag and Metal

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Journal of Iron and Steel Research International 2011年第S2期18卷 301-309页

作者： Seung Min han Dong joon Min Technical Research Laboratories POSCO Pohang 790-785 KOREA Department of Materials Science and Engineering YONSEI University Seoul 120-749 KOREA

Nitrogen can easily contaminate molten steel during the steelmaking process and due to the low nitrogen capacity in slag, it is difficult to remove entrapped nitrogen from liquid steel. Degassing is often done to the steel at secondary steelmaking to lower the nitrogen content, but the control can often be kinetically limited by the steel grade and also the slag composition. Thus, a fundamental understanding of nitrogen dissolution into molten slag and metal including the rate of nitrogen dissolution can help in controlling nitrogen content in the final *** kinetics of nitrogen dissolution in the molten calcium aluminate based slags and in molten steel with various element additions was investigated by measuring the 14N-15N isotope exchange reaction using a mass spectrometer at 1873 *** show that effect of elements on the rate constant of nitrogen dissolution such as Ni in Fe is relatively minimal similar to molybdenum. The surface rate constant of nitrogen dissolution in liquid Fe-10%Ni alloy was found to be 3.77×10-5 (mol/cm2·s·atm).The rate constant of nitrogen dissolution in the CaO-Al2O3-CaF2 slag was found to be wedge shaped, which decreased with increasing CaF2 to about 20 mol% followed by an increase through the rest of the CaF2 composition range. This was related to the effect of CaF2 on the structure of Al-O bonds for this slag.

关键词： rate constant slag structure molten steel isotope exchange technique adsorption coefficient nitrogen surface dissolution

Polysaccharide-based magnetically responsive polyelectrolyte hydrogels for tissue engineering applications

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Journal of Materials Science & Technology 2018年第8期34卷 1371-1377页

作者： Kummara Madhusudana Rao Anuj Kumar Sung soo han School of Chemical Engineering Yeungnam University Department of Nano Medical and Polymer MaterialsYeungnam University

Polysaccharide-based bionanocomposite hydrogels with functional nanomaterials were used in biomed- ical applications. Self-organization of xanthan gum and chitosan in the presence of iron oxide magnetic nanoparticles （Fe304 MNPs） allowed us to form magnetically responsive polyelectrolyte complex hydro- gels （MPECHs） via insitu ionic complexation using D-（＋）-glucuronic acid ^-lactone as a green acidifying agent. Characterization confirmed the successful formation of （and structural interactions within） the MPECH and good porous structure. The rheological behavior and compressive properties of the PECH and MPECH were measured. The results indicated that the incorporation of Fe304 MNPs into the PECH greatly improved mechanical properties and storage modulus （G＇）. In vitro cell culture of NIH3T3 fibroblasts on MPECHs showed improvements in cell proliferation and adhesion in an external magnetic field relative to the pristine PECH. The results showed that the newly developed MPECH could potentially be used as a magnetically stimulated system in tissue engineering applications.

关键词： Magnetic nanoparticles Bionanocomposite HydrogelsCell proliferation AdhesionTissue engineering

Clinical outcome of Fitz-Hugh-Curtis syndrome mimicking acute biliary disease

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World Journal of Gastroenterology 2008年第45期14卷 6975-6980页

作者： Seong Yong Woo Jin Il Kim Dae Young Cheung Se Hyun Cho soo-Heon Park joon-Yeol han Jae Kwang Kim Division of Gastroenterology and Hepatology Department of Internal Medicine the Catholic University of Korea

AIM: To analyze the clinical characteristics of patients diagnosed with Fitz-Hugh-Curtis ***: The clinical courses of patients that visited St. Mary's Hospital with abdominal pain from January 2005 to December 2006 and were diagnosed with Fitz-Hugh-Curtis syndrome were ***: Fitz-Hugh-Curtis syndrome was identified in 22 female patients of childbearing age; their mean age was 31.0 ± 8.1 years. Fourteen of these cases presented with pain in the upper right abdomen alone or together with pain in the lower abdomen, and six patients presented with pain only in the lower abdomen. The first impression at the time of visit was acute cholecystitis or cholangitis in 10 patients and acute appendicitis or pelvic inflammatory disease in eight patients. Twenty-one patients were diagnosed by abdominal computer tomograghy (CT), and the results of abdominal sonography were normal for 10 of these patients. Chlamydia trichomatis was isolated from 18 patients. Two patients underwent laparoscopic adhesiotomy and 20 patients were completely cured by antibiotic ***: For women of childbearing age with acute pain in the upper right abdomen alone or together with pain in the lower abdomen, Fitz-Hugh-Curtis syndrome should be considered during differential diagnosis. Moreover, in cases suspected to be Fitz-Hugh-Curtis syndrome, abdominal CT, rather than abdominal sonography, assists in the diagnosis.

关键词： Chlamydia trichomatis Abdominal pain Fitz-Hugh-Curtis syndrome

Stud welding for fixation of cryogenic insulation of membrane tanks in LNG ship building

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中国有色金属学会会刊：英文版 2009年第B9期19卷 271-275页

作者： Jeong-soo LEE Young-soo RYU Nam-In KIM Bong-joon KIM Yoo-Kyung KIM Myung-Hyun KIM hanjin Heavy Industries & Construction Co. Ltd Department of Naval Architecture and Ocean Engineering Pusan National University

The support plates including all of the inner hulls such as E grade steel, weld seams and SUS304L were considered to establish the optimal stud welding condition in LNG ship building. The stainless steel plate was especially applied to the bracket on the liquid dome. The polished and etched surfaces of the welded stud and support plate were examined if the bead was properly formed. With the micrographic examination, the fusion boundary of metal weld zone formed by stud welding was analyzed to optimize the welding parameters. And also the analysis of the unacceptable welding faults such as cold and hot weld were performed. The mechanical tests such as tensile tests and bending tests were carried out to reveal any abnormal variation in the relationship of process parameters and the strength.

关键词：螺柱焊接 LNG船绝缘膜优化工艺参数低温坦克不锈钢板最佳条件

Iatrogenic atlantoaxial rotatory subluxation after thyroidectomy in a pediatric patient:A case report

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World Journal of Clinical Cases 2023年第14期11卷 3351-3355页

作者： Woo-joon Hong Jung-Kil Lee Jong-Hwan Hong Moon-soo han Shin-Seok Lee Department of Neurosurgery Chonnam National University Hospital&Medical SchoolGwangju 61469South Korea Department of Rheumatology Department of Internal MedicineChonnam National University Medical School&HospitalGwangju 61469South Korea

BACKGROUND Atlantoaxial rotatory subluxation(AARS)is an uncommon disease with a greater prevalence among children than adults,and it is mostly associated with *** spinal injury accounts for a low percentage of ***,in AARS,20%-40%of cases are associated with surgery,and 48%are caused by ***,we describe our experience with a case of iatrogenic AARS after general *** SUMMARY A 12-year-old girl presented with right-sided torticollis and cervical motion *** patient had undergone thyroidectomy 2 mo *** tomography revealed AARS with bilateral locked *** the failure of repeated external reduction under general anesthesia,the patient underwent an open surgical *** patient gained atlantoaxial alignment without any ***-up radiographs showed a normal appearance without *** cervical spine of children is more predisposed to injury due to anatomical and biomechanical *** secondary to infection and surgery is known as Grisel’s syndrome,which involves non-traumatic *** cases of AARS after surgery and other procedures with no evidence of inflammation have been *** experience shows that surgery requiring hyperextension of the neck after general anesthesia should also be included as a risk *** Surgeons and anesthesiologists should be careful not to excessively extend the neck during pediatric ***,clinicians caring for pediatric patients with recent head and neck procedures must be aware of common AARS presentations.

关键词： Atlantoaxial joint Joint subluxation Adolescent Grisel’s syndrome Case report