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Diagnostic evaluation of endoscopic ultrasonography with submucosal saline injection for differentiating between T1a and T1b early gastric cancer

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World Journal of Gastroenterology 2022年第46期28卷 6564-6572页

作者： Ji Young Park Tae Joo jeon Department of Internal Medicine Inje University College of MedicineSanggye Paik HospitalSeoul 01757South Korea Department of Internal Medicine Yonsei University College of MedicineSeoul 03722South Korea

BACKGROUND Endoscopic ultrasonography(EUS)has become a reliable method for predicting the invasion depth of early gastric cancer(EGC).However,diagnostic accuracy of EUS is affected by several *** particular,it is difficult to differentiate between T1a and T1b EGC through *** To confirm whether submucosal saline injection(SSI)could improve the accuracy of EUS in distinguishing T1a and T1b lesions in *** Twenty-four patients with EGC were examined by EUS and subsequently by SSI combined EUS to compare the degree of tumor ***,they underwent endoscopic or surgical resection within 7 *** diagnostic accuracy of EUS and SSI combined EUS was evaluated based on the final pathological findings *** injected into the submucosa acted as an echoic contrast enhancing agent and had the effect of distinguishing the mucosal and submucosal layers *** Of total 24 patients,23 were diagnosed with EGC(T1 cancer:13 as T1a,and 10 as T1b).Standard EUS identified 6 of 13 T1a cancer patients and 3 of 10 T1b cancer ***,EUS-SSI identified 12 of 13 T1a cancer patients and 6 of 10 T1b cancer *** this study,SSI combined EUS was more accurate than EUS alone in diagnosing T1a and T1b lesions of EGC(75.0%and 37.5%,respectively).CONCLUSION SSI improved the diagnostic accuracy of EUS in distinguishing between the T1a and T1b stages in EGC.

关键词： Endoscopic ultrasonography Gastric cancer Endoscopy Surgery

Clinical significance of the neutrophil-lymphocyte ratio as an early predictive marker for adverse outcomes in patients with acute pancreatitis

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World Journal of Gastroenterology 2017年第21期23卷 3883-3889页

作者： Tae Joo jeon Ji Young Park Division of Gastroenterology Department of Internal Medicine Inje University College of Medicine Sanggye Paik Hospital

AIM To investigated the prognostic value of the neutrophillymphocyte ratio(NLR) in patients with acute pancreatitis and determined an optimal cut-off value for the prediction of adverse outcomes in these *** We retrospectively analyzed 490 patients with acute pancreatitis diagnosed between March 2007 and December 2012. NLRs were calculated at admission and 24, 48, and 72 h after admission. Patients were grouped according to acute pancreatitis severity and organ failure occurrence, and a comparative analysis was performed to compare the NLR between groups. RESULTS Among the 490 patients, 70 had severe acute pancreatitis with 31 experiencing organ failure. The severe acute pancreatitis group had a significantly higher NLR than the mild acute pancreatitis group on all 4 d(median, 6.14, 6.71, 5.70, and 4.00 vs 4.74, 4.47, 3.20, and 3.30, respectively, P seline NLR was 4.76 in predicting severity and 4.88in predicting organ failure in acute pancreatitis. CONCLUSION Elevated baseline NLR correlates with severe acute pancreatitis and organ failure.

关键词： Acute pancreatitis Neutrophil-lymphocyte ratio Organ failure severe acute pancreatitis

Deobfuscating Mobile Malware for Identifying Concealed Behaviors

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Computers, Materials & Continua 2022年第9期72卷 5909-5923页

作者： Dongho Lee Geochang jeon Sunjun Lee Haehyun Cho Soongsil University Seoul06978Korea

The smart phone market is continuously increasing and there are more than 6 billion of smart phone users worldwide with the aid of the 5G *** them Android occupies 87%of the market ***,the widespread Android smartphones has drawn the attention of the attackers who implement and spread ***,currently the number of malware targeting Android mobile phones is ever ***,it is a critical task to find and detect malicious behaviors of malware in a timely ***,unfortunately,attackers use a variety of obfuscation techniques for malware to evade or delay *** an obfuscation technique such as the class encryption is applied to a malicious application,we cannot obtain any information through a static analysis regarding its malicious ***,we need to rely on the manual,dynamic analysis to find concealed malicious behaviors from obfuscated *** avoid malware spreading out in larger scale,we need an automated deobfuscation approach that accurately deobfuscates obfuscated malware so that we can reveal hidden malicious *** this study,we introduce widely-used obfuscation techniques and propose an effective deobfuscation method,named ARBDroid,for automatically deobfuscating the string encryption,class encryption,and API hiding *** evaluation results clearly demonstrate that our approach can deobfuscate obfuscated applications based on dynamic analysis results.

关键词： Android obfuscation deobfuscation android reversing

Blockchain-Based secure and Fair IoT Data Trading System with Bilateral Authorization

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Computers, Materials & Continua 2023年第8期76卷 1871-1890页

作者： Youngho Park Mi Hyeon jeon Sang Uk Shin Electronics and Information Communications Research Center Pukyong National UniversityBusanKorea Department of Information security Graduate SchoolPukyong National UniversityBusanKorea Division of Computer Engineering Pukyong National UniversityBusanKorea

These days,data is regarded as a valuable asset in the era of the data economy,which demands a trading platform for buying and selling ***,online data trading poses challenges in terms of security and fairness because the seller and the buyer may not fully trust each ***,in this paper,a blockchain-based secure and fair data trading system is proposed by taking advantage of the smart contract and matchmaking *** proposed system enables bilateral authorization,where data trading between a seller and a buyer is accomplished only if their policies,required by each other,are satisfied *** can be achieved by exploiting the security features of the matchmaking *** guarantee non-repudiation and fairness between trading parties,the proposed system leverages a smart contract to ensure that the parties honestly carry out the data trading ***,the smart contract in the proposed system does not include complex cryptographic operations for the efficiency of onchain ***,these operations are carried out by off-chain parties and their results are used as input for the on-chain *** system also uses an arbitration protocol to resolve disputes based on the trading proof recorded on the *** performance of the protocol is evaluated in terms of off-chain computation overhead and on-chain gas *** results of the experiments demonstrate that the proposed protocols can enable the implementation of a cost-effective data trading system.

关键词： Bilateral authorization blockchain data marketplace fair exchange policy matching secure data trading

Association between statin therapy and the risk of stroke in patients with moyamoya disease:a nationwide cohort study

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Stroke & Vascular Neurology 2023年第4期8卷 276-283,I0010-I0021页

作者： Joonsang Yoo Jimin jeon Minyoul Baik Jinkwon Kim Department of Neurology Yongin Severance HospitalYonsei College of MedicineYongin-siKorea(the Republic of) Institute for Innovation in Digital Healthcare Yonsei UniversitySeoulKorea(the Republic of)

Background and objective Knowledge regarding the pharmacological treatment for moyamoya disease(MMD),a chronic and progressive cerebrovascular disease conferring greater stroke risk,is *** the present study,whether statin therapy is associated with a reduced risk of stroke in patients with MMD was *** This was a retrospective cohort study in which the occurrence of stroke in patients with newly diagnosed MMD was investigated using the nationwide health insurance database in Korea from January 2007 to March 2021.A multivariable Cox proportional hazards regression model was constructed for stroke,in which statin therapy after MMD diagnosis was treated as a time-dependent *** was done for sex,age,presence of comorbidities,concurrent stroke,revascularisation surgery and treatment with *** The present study included 13373 newly diagnosed patients with MMD;40.8%had a concurrent stroke at the time of MMD *** the mean follow-up of 5.1±3.3 years,631 patients(4.7%)suffered a stroke event(haemorrhagic stroke:458 patients,ischaemic stroke:173 patients).Statin therapy after MMD diagnosis was significantly associated with a reduced risk of stroke(adjusted HR 0.74;95%CI 0.60 to 0.91,p=0.004).In the secondary outcome analysis,the risk of haemorrhagic stroke(adjusted HR 0.74;95%CI 0.58 to 0.95,p=0.018)and ischaemic stroke(adjusted HR 0.75;95%CI 0.52 to 1.08,p=0.124)were reduced with the statin *** statins was also associated with a lower risk of all-cause mortality(adjusted HR 0.47;95%CI 0.33 to 0.67,psequent *** findings indicate statin treatment may be beneficial for patients with MMD,however the results should be confirmed in randomised controlled trials.

关键词： patients diagnosis nationwide

Quantitative analysis of uranium in electrorecovery salt of pyroprocessing using laser-induced breakdown spectroscopy

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Plasma Science and Technology 2021年第5期23卷 96-103页

作者： seul-Ki HAN se-Hwan PARK seong-Kyu AHN Korea Atomic Energy Research Institute Yuseong-guDaejeon 34057Republic of Korea Korea Institute of Industrial Technology Yeonsu-guIncheon21999Republic of Korea

The amounts of nuclear materials in the Li Cl-KCl salt in pyroprocessing have to be analyzed to prevent the diversion of the nuclear *** alternative method to the chemical analysis has been pursued,and laser-induced breakdown spectroscopy(LIBS)is one *** the present work,an in situ and quantitative analysis method of electro-recovery(ER)salt was proposed and demonstrated by using LIBS combined with dipstick *** types of simulated salt samples were prepared:ER salt sample and salt obtained from the dipstick sampling,and pulsed neodymium-doped yttrium aluminum garnet(Nd:YAG)laser with a wavelength of 532 nm was focused on the salt to generate *** plasma emission was measured by using an Echelle spectrometer with a resolution of 0.01 nm in conjunction with an Intensified Charge-Coupled Detector *** U and other rare earth peaks in the spectra were *** best Limit of Detection and Root Mean Square Error of Calibration of U were 38 ppm and 0.0203 wt%,*** work shows that the U in the pyroprocessing ER salt can be monitored with LIBS.

关键词： LIBS uranium LOD RMseC

Automatic fuzzy-DBSCAN algorithm for morphological and overlapping datasets

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Journal of Systems Engineering and Electronics 2020年第6期31卷 1245-1253页

作者： YELGHI Aref KÖse Cemal YELGHI Asef SHAHKAR Amir Department of Computer Engineering Avrasya UniversityTrabzon 61250Turkey Department of Computer Engineering Karadeniz Technical UniversityTrabzon 61080Turkey Department of Business Administration Gazi UniversityAnkara 06560Turkey Civil Engineering Department Karadeniz Technical UniversityTrabzon 61080Turkey

Clustering is one of the unsupervised learning *** is a procedure which partitions data objects into *** algorithms could not overcome the problems of morphology,overlapping and the large number of clusters at the same *** scientific communities have used the clustering algorithm from the perspective of density,which is one of the best methods in *** study proposes a density-based spatial clustering of applications with noise(DBSCAN)algorithm based on the selected high-density areas by automatic fuzzy-DBSCAN(AFD)which works with the initialization of two ***,by using fuzzy and DBSCAN features,is modeled by the selection of high-density areas and generates two parameters for merging and separating *** two generated parameters provide a state of sub-cluster rules in the Cartesian coordinate system for the *** model overcomes the problems of clustering such as morphology,overlapping,and the number of clusters in a dataset *** the experiments,all algorithms are performed on eight data sets with 30 times of *** of them are related to overlapping real datasets and the rest are morphologic and synthetic *** is demonstrated that the AFD algorithm outperforms other recently developed clustering algorithms.

关键词： clustering density-based spatial clustering of applications with noise(DBSCAN) fuzzy overlapping data mining

《共产党宣言》序言中的辩证思维及其当代启示

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乐山师范学院学报 2024年第9期39卷 1-9页

作者：龚秀勇莫色阿木西南石油大学马克思主义学院四川成都610500 西南石油大学马克思主义哲学研究所四川成都610500

辩证思维是中国共产党人认识世界、改造世界的必备基本功。长期以来,七篇序言被视作《共产党宣言》的补充或附属,掩盖了其辩证思维的理论意蕴与当代价值。辩证思维是我们党在社会主义革命、建设、改革时期一贯坚持运用的科学思维方法,... 详细信息

辩证思维是中国共产党人认识世界、改造世界的必备基本功。长期以来,七篇序言被视作《共产党宣言》的补充或附属,掩盖了其辩证思维的理论意蕴与当代价值。辩证思维是我们党在社会主义革命、建设、改革时期一贯坚持运用的科学思维方法,是我们党的事业不断取得突破性成就的重要法宝。进入新时代,全党迫切需要运用《共产党宣言》序言中的辩证思维观察时代、把握时代、引领时代。今天,结合《共产党宣言》经典文本研读七篇序言,深入学习和把握其中的辩证思维,坚持恪守正道与创新发展相结合、坚持励精图治与胸怀天下相结合的辩证思维,对于推动我国第二个百年奋斗目标的实现具有重要意义。

关键词：《共产党宣言》序言辩证思维国际共产主义运动

Finite element analysis using elasto-visco-plastic self-consistent polycrystal model for E-form Mg sheet subjected to bending

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Journal of Magnesium and Alloys 2023年第4期11卷 1393-1407页

作者： Bohye jeon Min-seong Kim Shi-Hoon Choi Youngung jeong Department of Materials Convergence and System Engineering Changwon National UniversityChangwon-siGyeongnamRepublic of Korea Center for Energy Materials Research Korea Institute of Science and TechnologySeoulRepublic of Korea Department of Advanced Components and Materials Engineering Sunchon National UniversitySuncheon-siJeollanam-doRepublic of Korea School of Materials Science and Engineering Changwon National UniversityChangwon-siGyeongnamRepublic of Korea

The mechanical behavior of a magnesium alloy E-form under bending was investigated using the elasto-visco-plastic polycrystal model(ΔEVPSC) and its finite element(FE) implementation(ΔEVPSC-FE) developed in jeong et al. and jeong and Tomé. The crystallographic orientation distribution(COD) obtained from X-ray diffraction was used to represent the initial texture, and the Voce hardening parameters were calibrated by fitting the uniaxial tension and the compression flow stress curves. A quasi-static FE analysis of a miniaturized V-bending operation was conducted using the ΔEVPSC-FE model. The bending induced an inhomogeneous stress response along the through-thickness and the lateral directions, which was well captured by the model. Moreover, the predictive capability of the model was validated by comparing with various experimental results such as(1) force vs. displacement curves;(2) the through-thickness variations in the twin volume fraction;and(3) the changes in crystallographic texture as a function of displacement. Additional bending simulation was performed using an isotropic texture, the result of which suggests that the potential improvement in bendability of the magnesium alloy is attainable by weakening the initial texture. Moreover, the simulation results imply that the crystallographic texture, which may affect the twin activation across the thickness direction, plays a significant role in the shifting direction of the neutral layer.

关键词： FEM Texture V-bending Polycrystal Magnesium Elasto-visco-plasticity