检索结果-南通市图书馆

Journal of Advanced Ceramics 2020年第4期9卷 462-470页

作者： Xiaobing Zhou Lei Jing Yong Duk Kwon Jin-young Kim Zhengren Huang Dang-Hyok yoon Jaehyung Lee Qing Huang Engineering Laboratory of Advanced Energy Materials Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201China School of Materials Science and Engineering Yeungnam UniversityGyeongsan38541Republic of Korea Union Materials Corporation Daegu42710Republic of Korea

High strength SiC whisker-reinforced Ti3SiC2 composites(SiCw/Ti3SiC2)with an improved thermal conductivity and mechanical properties were fabricated by spark plasma *** bending strength of 10 wt%SiCw/Ti3SiC2 was 635 MPa,which was approximately 50%higher than that of the monolithic Ti3SiC2(428 MPa).The Vickers hardness and thermal conductivity(k)also increased by 36%and 25%,respectively,from the monolithic Ti3SiC2 by the incorporation of 10 wt%*** remarkable improvement both in mechanical and thermal properties was attributed to the fine-grained uniform composite microstructure along with the effects of incorporated *** SiCw/Ti3SiC2 can be a feasible candidate for the in-core structural application in nuclear reactors due to the excellent mechanical and thermal properties.

关键词： SiC whisker Ti3SiC2 mechanical property thermal conductivity spark plasma sintering

A study on hydrogen uptake and release of a eutectic mixture of biphenyl and diphenyl ether

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2020年第3期29卷 11-16页

作者： Munjeong Jang Byeong Soo Shin young Suk Jo Jeong Won Kang Sang Kyu Kwak Chang Won yoon Hyangsoo Jeong Center for Hydrogen Fuel Cell Research Korea Institute of Science and Technology(KIST)5 Hwarang-ro 14-gilSeongbuk-guSeoul 02792Republic of Korea Divison of Energy and Environment Technology KIST SchoolKorea University of Science and Technology5 Hwarang-ro 14-gilSeongbuk-guSeoul 02792Republic of Korea Department of Chemical and Biological Engineering Korea UniversityAnam-ro 145Seongbuk-guSeoul 02841Republic of Korea School of Energy and Chemical Engineering Ulsan National Institute of Science and Technology50UNIST-gilUlsan 44919Republic of Korea KHU-KIST Department of Converging Science and Technology Kyung Hee University26 Kyungheedae-roDongdaemun-guSeoul 02447Republic of Korea

Hydrogen storage in Liquid Organic Hydrogen Carrier(LOHC)systems is appealing for the safe storage and distribution of excess renewable energy via existing gasoline infrastructures to *** present the eutectic mixture of biphenyl and diphenyl ether of its first use as a LOHC *** material is hydrogenated with 99%selectivity without the cleavage of C–O bond,with commercial heterogeneous catalysts,which is confirmed by nuclear magnetic spectroscopy and gas chromatography-mass *** concentration,dehydrogenation enthalpy,and thermo-neutral temperature are calculated using a density functional *** results indicate that O-atom-containing material exhibits more favorable dehydrogenation thermodynamics than that of the hydrocarbon *** H2-rich material contains6.8 wt%of gravimetric hydrogen storage capacity.A preliminary study of catalytic dehydrogenation on a continuous reactor is presented to demonstrate a reversibility of this material.

关键词： Hydrogen storage Liquid organic hydrogen carrier Diphenyl ether Dehydrogenation Thermodynamics

High-performance solid-solution potassium-ion intercalation mechanism of multilayered turbostratic graphene nanosheets

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2022年第4期31卷 814-823页

作者： Jiae Um Seung Uk yoon Hoseong Kim Beom Sik Youn Hyoung-Joon Jin Hyung-Kyu Lim young Soo Yun Program in Environmental and Polymer Engineering Inha Universityncheon 22212 South Korea Department of Polymer Science and Engineering Inha UniversityIncheon 22212South Korea Division of Chemical Engineering and Bioengineering Kangwon National University Chuncheon Gangwon-do 24341 South Korea KU-KIST Graduate School of Converging Science and Technologyea University 145 Anam-roSeongbuk-guSoul02841 South Korea Department of Integrative Energy Engineering 145 Anam-roSongbuk-guKorea UniversitySeoul 02841 South Korea

The solid-solution reaction between an alkali cation and an active host material is known as a singlephase redox mechanism,and it is typically accompanied by a continuous voltage *** is distinct from the typical alkali cation intercalation reaction at an equivalent site of the active host material,which exhibits a voltage ***,we report an unusual solid-solution potassium-ion intercalation mechanism with a low-voltage plateau capacity on multilayered turbostratic graphene nanosheets(T-GNSs).Despite the disordered graphitic structure with a broad range of d-spacings(3.65–4.18À),the T-GNSs showed a reversible plateau capacity of~200 m A h g^(-1),which is higher than that of a well-ordered graphite nanoplate(~120 m A h g^(-1)).In addition,a sloping capacity of~220 m A h g^(-1)was delivered with the plateau capacity,and higher rate capabilities,better reversibility,and a more stable cycling performance were confirmed on the turbostratic ***-principles calculations suggest that the multitudinous lattice domains of the T-GNSs contain diverse intercalation sites with strong binding energies,which could be the origin of the high-performance solid-solution potassium-ion intercalation behavior when the turbostratic graphene stacks have a d-spacing smaller than that of equilibrium potassium–graphite intercalation compounds(5.35À).

关键词： Turbostratic graphite Graphene nanosheet Defective carbon Anode Potassium-ion batteries

Contained local compression on peri-ascending aortic area for postoperative bleeding control:a case report

在线全文

学校读者我要写书评

暂无评论

The Journal of Biomedical Research 2021年第1期35卷 72-74页

作者： Su young yoon Si-Wook Kim Dohun Kim Jong-Myeon Hong Department of Thoracic and Cardiovascular Surgery 2Trauma CenterChungbuk National University HospitalCollege of MedicineChungbuk National UniversitySeowon-GuCheongju 28644Republic of Korea

After type A acute aortic dissection(AAD)repair or modified Bentall procedure,uncontrollable bleeding from the anastomotic sites of the fragile dissected tissues or aortic root area is a critical situation to a cardiac *** postoperative care,lots of blood transfusion with strict monitoring on the patient all night and subsequent reoperation for the bleeding control is usually *** managed to make contained local compression of upper half of the heart,from upper part of the right ventricle to just above the innominate vein,using bovine pericardium with closing both sides of transverse sinus in two cases of uncontrolled postoperative bleeding(bleeding from distal anastomotic site in type-A AAD and valve sitting site in modified Bentall procedure).Even though reoperations for the removal of packed gauges were done in both cases 2 days later,postoperative courses at intensive care unit were very smooth with little need for *** kind of contained local compression trial could be a useful strategy for dealing with the malignant uncontrollable bleeding from the fragile aortic tissue or root area after acute dissection or aortic root repair.

关键词： uncontrollable bleeding contained local compression aortic dissection aortic root repair

An Efficient Organic Additive to Control the Crystallization Rate of Aliphatic Polyketone: A Non-isothermal Crystallization Kinetics Study

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2017年第4期35卷 547-557页

作者： He-xin Zhang Min-Jeong Park young-Kwon Moon Eun-Bin Ko Xue-quan Zhang Keun-Byoung yoon Department of Polymer Science and Engineering Kyungpook National University Key Laboratory of Synthetic Rubber Changchun Institute of Applied ChemistryChinese Academy of Sciences

Three types of organic compounds--two carboxylic acids and an anhydride, were used as additives for polyketone （PK）. The effect of the additive structure and their feed ratios on the melting temperature, crystallization temperature, and crystallization rate of PK were studied. We found that the crystallization temperature could be reduced significantly by introducing a small quantity of organic additive, in particular, an anhydride. On addition of 1 phr of anhydride, the crystallization temperature was reduced by 10.7 ℃. Therefore, the non-isothermal crystallization kinetics of aliphatic PKJanhydride blends with various feed ratios was investigated using DSC. The results were analyzed by various theoretical models, such as Avrami, Ozawa and combined Avrami-Ozawa models.

关键词： Polyketone Anhydride Non-isothermal Crystallization kinetics

Growth of BaTiO_3-Ag hybrid composite films at room temperature by aerosol deposition

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 2012年第S3期22卷 735-739页

作者： young Joon yoon Sung Hwan CHO Jihoon KIM Hyo Tae KIM Hong Koo BAIK Jong-Hee KIM Nano-Convergence Intelligence Material Team Korea Institute of Ceramic Engineering and Technology Division of Advanced Materials Engineering Kongju National University Department of Materials Science and Engineering Yonsei University

Barium titanate (BaTiO3) and silver (Ag) composite film with high dielectric constant was grown at room temperature by an aerosol deposition *** dielectric constant increases by 0.5 times after adding Ag to the BaTiO3 matrix,compared with pure *** high dielectric constant can be attributed to the percolation effect of Ag inclusions in the BaTiO3 *** Ag was present in the form of discrete layer in the BaTiO3 *** dielectric properties of BaTiO3 Ag were discussed in detail taking into account the changes in microstructures.

关键词： composites percolation aerosol deposition BaTiO3 Ag

Current status and challenges in sentinel node navigation surgery for early gastric cancer

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Cancer Research 2017年第2期29卷 93-99页

作者： Bang Wool Eom young-II Kim Hong Man yoon Soo-Jeong Cho Jong Yeul Lee Chan GyooKim Soo Jin Kim Ji yoon Rho Seok Ki Kim Myeong-Cherl Kook young-Woo Kim Keun Won center for gastric cancer national cancer centerrepublic of korea center for diagnostic oncology national cancer centerrepublic of korea

Although a number of feasibility studies for sentinel node （SN） concepts in gastric cancer have been conducted since 2000, there remains a debate regarding detailed detection techniques and oncological safety. Two important multicenter phase II clinical trials were performed in Japan that used different methods and reached different conclusions; one confirmed acceptable results with a false-negative rate of 7%, and the other showed an unacceptably high false-negative rate of 46.4%. The Sentinel Node Oriented Tailored Approach （SENORITA） trial is a multicenter randomized controlled phase 1/I trial being performed in Korea. Patient enrollment is now complete and the long-term results are currently awaited. Recently, an image-guided SN mapping technique using infrared ray/fluorescence was introduced. This method might be a promising technology because it allows the clear visualization of SNs. With regard to the primary tumor, the non-exposed endoscopic wall-inversion surgery technique and non-exposure endolaparoscopic full-thickness resection with simple suturing technique have been reported. These methods prevent abdominal infection and tumor seeding and can be good alternatives to conventional laparoscopic gastric wedge resection. For indications, SN navigation surgery can be extended to patients who underwent non-curative endoscopic resection. Although a few studies have been performed on these patients, sentinel concepts may be beneficial to patients as they omit the need for additional gastrectomy. SN navigation surgery can lead to actual organ-preserving surgery and plays a key role in improving the quality of life of patients with early gastric cancer in the future.

关键词： Sentinel node navigation surgery early gastric cancer SENORITA

Network Traffic Synthesis and Simulation Framework for Cybersecurity Exercise Systems

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第9期80卷 3637-3653页

作者： Dong-Wook Kim Gun-yoon Sin Kwangsoo Kim Jaesik Kang Sun-young Im Myung-Mook Han Department of AI Software Gachon UniversitySeongnam-Si13120Republic of Korea School of Computer Engineering&Applied Mathematics Hankyong National UniversityPyeongtaek-Si17738Republic of Korea Cyber ElectronicWarfare Research and Development LIG Nex1Seongnam-Si13488Republic of Korea

In the rapidly evolving field of cybersecurity,the challenge of providing realistic exercise scenarios that accurately mimic real-world threats has become increasingly *** methods often fall short in capturing the dynamic and complex nature of modern cyber *** address this gap,we propose a comprehensive framework designed to create authentic network environments tailored for cybersecurity exercise *** framework leverages advanced simulation techniques to generate scenarios that mirror actual network conditions faced by professionals in the *** cornerstone of our approach is the use of a conditional tabular generative adversarial network(CTGAN),a sophisticated tool that synthesizes realistic synthetic network traffic by learning fromreal data *** technology allows us to handle technical components and sensitive information with high fidelity,ensuring that the synthetic data maintains statistical characteristics similar to those observed in real network *** meticulously analyzing the data collected from various network layers and translating these into structured tabular formats,our framework can generate network traffic that closely resembles that found in actual *** integral part of our process involves deploying this synthetic data within a simulated network environment,structured on software-defined networking(SDN)principles,to test and refine the traffic *** simulation not only facilitates a direct comparison between the synthetic and real traffic but also enables us to identify discrepancies and refine the accuracy of our *** initial findings indicate an error rate of approximately 29.28%between the synthetic and real traffic data,highlighting areas for further improvement and *** providing a diverse array of network scenarios through our framework,we aim to enhance the exercise systems used by cybersecurity *** not only improves their ability to r

关键词： Cybersecurity exercise synthetic network traffic generative adversarial network traffic generation software-defined networking

Pre-existing diabetes mellitus increases the risk of gastric cancer:A meta-analysis

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2013年第6期19卷 936-945页

作者： Jae Moon yoon Ki young Son Chun Sick Eom Daniel Durrance Sang Min Park Department of Family Medicine Seoul National University HospitalSeoul National University College of MedicineSeoul 110-744South Korea Center for Health Promotion Seoul National University HospitalSeoul 110-744South Korea Department of Family Medicine Hallym UniversityChuncheon Sacred Heart HospitalChunCheon 200-704South Korea Family Medicine Graduate School of Korea University College of MedicineSeoul 110-799South Korea

AIM:To systematically assess the association between diabetes and incidence of gastric ***:We searched MedLine (PubMed),EMBASE,and the Cochrane Library without any limitations with respect to publication date or language,we also searched the references of qualifying *** studies and cohort studies comparing the risk of gastric cancer between diabetic patients and control subjects were *** excluded studies reporting only standardized incidence ratios without control groups and those that investigated only mortality but not *** studies met our criteria,and the qualities of these studies were assessed using theNewcastle-Ottawa Quality Assessment *** performed a meta-analysis of pre-existing diabetes and gastric cancer incidence using the DerSimonian-Laird method for *** subgroup analyses,we separated the studies by study type,region,sex and method to determine confounding factors and *** also conducted subgroup analyses to examine the effects of smoking,Helicobacter pylori (***) infection,and cancer *** bias was evaluated using Begg's ***:A random-effects model meta-analysis showed an increased gastric cancer risk in diabetic patients [relative risk (RR)=1.19;95%CI:1.08-1.31].Subgroup analyses indicated that this result persisted in cohort studies (RR=1.20;95%CI:1.08-1.34),in studies on populations of both Western (RR=1.18;95%CI:1.03-1.36) and Eastern countries (RR=1.19;95%CI:1.02-1.38),in a female subgroup (RR=1.24;95%CI:1.01-1.52),and in highly qualified studies (RR=1.17;95%CI:1.05-1.31).Moreover,these results persisted when the analysis was confined to studies adjusted for well-known gastric cancer risk factors such as smoking (RR=1.17;95%CI:1.01-1.34) and *** infection (RR=2.35;95%CI:1.24-4.46).CONCLUSION:Pre-existing diabetes mellitus may increase the risk of gastric cancer by approximately 19%.This effect seems to be unrelated to geographical region.

关键词： Disease association Diabetes mellitus Gastric cancer Incidence Risk Meta-analysis

Laparoscopy-assisted pylorus-preserving gastrectomy for early gastric cancer: A retrospective study of long-term functional outcomes and quality of life

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2019年第36期25卷 5494-5504页

作者： Bang Wool Eom Boram Park Hong Man yoon Keun Won Ryu young-Woo Kim Center for Gastric Cancer National Cancer Center Goyang 10408 South Korea Biostatistics Collaboration Team Research Core Research institute National Cancer Center Goyang 10408 South Korea

BACKGROUND Laparoscopy-assisted pylorus-preserving gastrectomy (LAPPG) was known to have benefits of function-preserving surgery compared to laparoscopy-assisted distal gastrectomy (LADG). However, in clinical settings, delayed gastric emptying and esophageal reflux following LAPPG can be serious issues, making surgeons reluctant to perform LAPPG. It is unclear that LAPPG had better longterm functional outcomes and quality of life compared to LADG. AIM To evaluate the long-term functional outcomes and patient-reported quality of life of LAPPG compared to those of LADG. METHODS We reviewed the clinicopathological data of 195 patients who underwent LADG with Billroth II anastomosis and 101 patients who underwent LAPPG for cT1N0 gastric cancer in the middle third of the stomach between 2012 and 2015. Postoperative complications, nutritional parameters, and survey results of the European Organization for Research and Treatment of Cancer Questionnaire C30 and STO22 questionnaire were compared between the two groups. RESULTS The serum hemoglobin level was significantly higher in the LAPPG group than in the LADG group (P < 0.001). In the endoscopic findings, incidence of bile reflux was lower (P < 0.001);however, the incidence of residual food was higher in the LAPPG group than in the LADG group (P < 0.001). Regarding the quality of life score, the LAPPG group had a better physical functioning score (86.7 vs 90.0, P = 0.032) but also greater pain and reflux when compared to the LADG group [8.3 vs 16.7 in pain, 11.1 (interquartile range, 0, 22.2) vs 11.1 (interquartile range, 11.1, 33.3) in reflux, P = 0.034 and 0.001, respectively]. CONCLUSION LAPPG is beneficial to recovery of anemia and to bile reflux, however, it might be unfavorable in terms of pain and reflux symptoms compared to LADG with Billroth II anastomosis.

关键词： Gastric cancer Pylorus-preserving gastrectomy Function Quality of life