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桌面毛细管快放电X射线实验装置电压测量系统的研究

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中国激光 2005年第7期32卷 894-898页

作者：黄东海 kim Dong-Eon 华侨大学信息科学与工程学院福建泉州362021 韩国浦项科技大学

桌面毛细管快放电X射线激光实验装置,是研究高压大电流放电直接激励X射线激光放大技术的快脉冲发生器。其特点是电压高、电流大、脉冲陡、干扰强、空间小。常规绝缘结构的高压无感电阻测量系统难以满足其高电压脉冲测量的要求。研究了... 详细信息

桌面毛细管快放电X射线激光实验装置,是研究高压大电流放电直接激励X射线激光放大技术的快脉冲发生器。其特点是电压高、电流大、脉冲陡、干扰强、空间小。常规绝缘结构的高压无感电阻测量系统难以满足其高电压脉冲测量的要求。研究了一种新型绝缘结构高压无感电阻电压测量传感器及两级分压测量系统,介绍了传感器的绝缘结构原理、测量系统的组成以及高电压测量结果,并从理论上验证和分析了测量系统的测量结果及相对误差。实验结果表明,新型绝缘结构高压无感电阻能同时具有较高电位梯度和较小电感的优点,设计的电压测量系统峰值误差小,抗干扰能力强,可以较好地满足毛细管快放电X射线激光实验装置中的高电压测量。

关键词：激光技术高电压测量电压传感器与测量系统新型绝缘结构高压无感电阻 X射线激光毛细管快放电

Systematic review on the surgical treatment for T1 gallbladder cancer

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World Journal of Gastroenterology 2011年第2期17卷 174-180页

作者： Seung Eun Lee Jin-Young Jang Chang-Sup Lim Mee Joo Kang Sun-Whe kim Department of Surgery Chung-Ang University College of Medicine Department of Surgery Seoul National University College of Medicine

AIM:To evaluate the efficacy of simple and extended cholecystectomy for mucosa(T1a) or muscularis(T1b) gallbladder(GB) cancer. METHODS:Original studies on simple and extended cholecystectomy for T1a or T1b GB cancer were searched from MEDLINE(PubMed) ,Cochrane Library,EMBase,and CancerLit using the search terms of GB,cancer/carcinoma/tumor/neoplasm. RESULTS:Twenty-nine out of the 2312 potentially relevant publications met the eligibility *** the 1266 patients with GB cancer included in the publications,706(55.8%) and 560(44.2%) had T1a and T1b GB cancer,*** cholecystectomy for T1a and T1b GB cancer was performed in 590(83.6%) and 375(67.0%) patients,respectively(P<0.01) .In most series,the treatment of choice was simple cholecystectomy for T1a GB cancer patients with a 5-year survival rate of 100%.Lymph node metastasis was detected in 10.9% of the T1b GB cancer patients and in 1.8%of the T1a GB cancer patients,respectively(P<0.01) .Eight patients(1.1%) with T1a GB cancer and 52 patients(9.3%) with T1b GB cancer died of recurrent GB cancer(P<0.01) . CONCLUSION:Simple cholecystectomy represents the adequate treatment of T1a GB *** is no definite evidence that extended cholecystectomy is advantageous over simple cholecystectomy for T1b GB cancer.

关键词： Gallbladder Cancer Cholecystectomy Simple Extended

Effects of flow velocity on electrochemical behavior of seachest 5083-H116 Al alloy for ship

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Transactions of Nonferrous Metals Society of China 2011年第8期21卷 1703-1709页

作者： Seung-Jun LEE Seong-Jong kim Division of Marine Engineering Mokpo Maritime University

Electrochemical behavior of 5083-H116 Al alloy with flow velocity of seachest material for Al ship was *** examine the electrochemical characteristics of flow velocity and its effects on the performance of the alloy,experiments were conducted at four flow velocity variables using static state with an *** ultrasonic vibration generator using piezoelectric effect was used in cavitation test according to the requirements of in *** results show that the corrosion current density and damage were increased by applying the flow velocity compared to static ***,it is determined that the case of applying flow velocity is weaker to the corrosion.

关键词： aluminium ships over-protection marine growth prevention system sea-chest flow velocity

Lithospheric thinning and ignition of a Cordilleran magmatic flare-up:Geochemical and O-Hf isotopic constraints from Cretaceous plutons in southern Korea

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Geoscience Frontiers 2023年第1期14卷 327-345页

作者： Albert Chang-sik Cheong Min-Ji Jung Hui JeJo Jeongmin kim Shinae Lee Youn-Joong Jeong Korea Basic Science Institute Ochang Center Cheongju 28119Republic of Korea Graduate School of Analytical Science and Technology Chungnam National UniversityDaejeon 34134Republic of Korea Korea Institute of Geoscience and Mineral Resources Daejeon 34132Republic of Korea

Northeast Asian continental margins contain the products of magma emplacement driven by prolonged subduction of the(paleo-)Pacific *** observed in many Cordilleran arcs,magmatic evolution in this area was punctuated by high-volume pulses amid background *** present study investigates the early evolution of the Cretaceous magmatic flare-up using new and published geochronological,geochemical,and O-Hf isotope data from plutonic rocks in the southern Korean *** a long(~50 m.y.)magmatic hiatus and the development of the Honam Shear Zone through flat-slab subduction,the Cretaceous flare-up began with the intrusion of monzonites,granodiorites,and granites in the inboard Gyeonggi Massif and the intervening Okcheon *** to Jurassic granitoids formed during the former flare-up,Albian(~111 Ma)monzonites found in the Eopyeong area of the Okcheon Belt have distinctly higher zirconε_(Hf)(t)(-7.5±1.3)andδ^(18)O(7.78‰±0.25‰)values and lower wholerock La/Yb and Sr/Y *** voluminous coeval granodiorite and granite plutons in the Gyeonggi Massif are further reduced in Sr/Y and to a lesser extent,in La/Yb,and have higher zirconε_(Hf)(t)values(-13 to-19)than the Precambrian basement(ca.-30).These chemical and isotopic features indicate that Early Cretaceous lithospheric thinning,most likely resulting from delamination of tectonically and magmatically overthickened lithospheric keel that was metasomatized during prior subduction episodes,and consequent asthenospheric upwelling played vital roles in igniting the magmatic *** O-Hf isotopic ranges of synmagmatic zircons from the Albian plutons and their Paleoproterozoic and Jurassic inheritance attest to the involvement of lithospheric mantle and crustal basement in magma generation during this decratonization *** magmatism then migrated trenchward and culminated in the Late Cretaceous,yielding widespread granitoid rocks emplaced at shallow crustal *** early Late Cretaceous(94-8

关键词： Cordilleran arc Cretaceous flare-up Korean Peninsula Lithospheric thinning Crustal rejuvenation

Supplementation of oligosaccharide-based polymer enhanced growth and disease resistance of weaned pigs by modulating intestinal integrity and systemic immunity

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Journal of Animal Science and Biotechnology 2022年第3期13卷 802-815页

作者： Kwangwook kim Yijie He Cynthia Jinno Lauren Kovanda Xunde Li David Bravo Eric Cox Yanhong Liu Department of Animal Science University of CaliforniaDavisCA 95616USA School of Veterinary Medicine University of CaliforniaDavisCA 95616USA Pancosma ADM 1180 RolleSwitzerland Department of Virology Parasitology and ImmunologyGhent University9000 GhentBelgium

Background:There is a great demand for antibiotic alternatives to maintain animal health and *** objective of this experiment was to determine the efficacy of dietary supplementation of a blood group A6 type 1antigen oligosaccharides-based polymer(Coligo)on growth performance,diarrhea severity,intestinal health,and systemic immunity of weaned pigs experimentally infected with an enterotoxigenic Escherichia coli(ETEC),when compared with ***:Pigs in antibiotic carbadox or Coligo treatment groups had greater(P<0.05)body weight on d 5 or d 11post-inoculation(PI)than pigs in the control group,*** of antibiotics or Coligo enhanced(P<0.05)feed efficiency from d 0 to 5 PI and reduced(P<0.05)frequency of diarrhea throughout the experiment,compared with pigs in the control *** of antibiotics reduced(P<0.05)fecalβ-hemolytic coliforms on d 2,5,and 8 *** in antibiotics or Coligo groups had reduced(P<0.05)neutrophil counts and serum haptoglobin concentration compared to pigs in the control group on d 2 and 5 *** in Coligo had reduced(P<0.05)total coliforms in mesenteric lymph nodes on d 5 and 11 PI,whereas pigs in antibiotics or Coligo groups had reduced(P<0.05)total coliforms in spleen on d 11 PI compared with pigs in the control *** d 5 PI,pigs in the Coligo group had greater(P<0.05)gene expression of ZO1 in jejunal mucosa,but less(P<0.05)m RNA expression of IL1B,IL6,and TNF in ileal mucosa,in comparison with pigs in the control *** of antibiotics enhanced(P<0.05)the gene expression of OCLN in jejunal mucosa but decreased(P<0.05)IL1B and IL6 gene expression in ileal mucosa,compared with the *** d 11 PI,supplementation of antibiotics or Coligo up-regulated(P<0.05)gene expression of CLDN1 in jejunal mucosa,but Coligo reduced(P<0.05)IL6 gene expression in ileal mucosa compared to pigs in the control ***:Supplementation of Coligo improved growth performance,al

关键词： Enterotoxigenic E.coli Growth rate Intestinal barrier function Oligosaccharide-based polymer Systemic immunity Weaned pigs

Gastrointestinal tuberculosis is not associated with proton pump inhibitors:A retrospective cohort study

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World Journal of Gastroenterology 2013年第2期19卷 258-264页

作者： Kyoung Sup Hong Seung Joo Kang Jong Kyoung Choi Ju Han kim Heewon Seo Suehyun Lee Jae-Woo Jung Hye-Ryun Kang Sang-Heon Cho Joo Sung kim Department of Internal Medicine Drug Safety Monitoring CenterSeoul National University HospitalSeoul National University College of MedicineSeoul 110799South Korea Department of Internal Medicine Seoul National University HospitalSeoul National University College of MedicineSeoul 110799South Korea Division of Biomedical Informatics Systems Biomedical Informatics Research CenterSeoul National University College of MedicineSeoul 110799South Korea

AIM:To evaluate the effect of proton pump inhibitors(PPIs) on the development of gastrointestinal ***:All patients who were more than 20 years old and who had received a prescription for PPIs among those who visited Seoul National University Hospital from January 1,2005 to December 31,2009 were *** to the low sensitivity of the microbiologic test and the nonspecific pathologic findings,the diagnosis of gastrointestinal tuberculosis was confirmed through the presence of active ulcerations and the responses to anti-tuberculosis *** patients were divided into two groups according to treatment duration(group 1:≤ 3 mo;group 2:> 3 mo) and were followed up from the time they took the first prescription of PPIs until their last *** regression analysis was used to calculate the relative risks(RR) and 95%CI,adjusting for ***:Among the 61 834 patients exposed to PPIs(50 534 in group 1;11 300 in group 2),21 patients were diagnosed with PPI-associated gastrointestinal tuberculosis during 124 274 person-years of *** 21 patients,the 12 who revealed only scar changes in the colonoscopy were excluded from the statistical *** those who remained,2 were excluded because they underwent gastrointestinal endoscopy within 4 wk of the first prescription for *** exposure to PPI was associated with a higher mean age(55.0 ± 14.5 in group 1 vs 58.2 ± 13.3 in group 2,P < 0.001) and a higher Charlson co-morbidity index(0.50 ± 0.93 in group 1 vs 0.77 ± 1.14 in group 2,P < 0.001).The true incidence of active gastrointestinal tuberculosis was 0.65 per 1000 person-years in group 1 and 0.03 per 1 000 person-years in group *** the less-than-three-month PPI treatment period in group 1,the over-three-month PPI therapy period in group 2 was not associated with increased risk of acquiring gastrointestinal tuberculosis,after adjusting for age and co-morbidities,whereas the Charlson co-morbidity index was associated

关键词： Proton pump inhibitor Acid suppression Tuberculosis Gastrointestinal tuberculosis Tuberculous colitis

Indian monsoon variability in the Mahanadi Basin over the last two glacial cycles and its implications on the Indonesian throughflow

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Geoscience Frontiers 2023年第1期14卷 215-229页

作者： Jongmin Lee Sunghan kim Minoru Ikehara Keiji Horikawa Yoshihiro Asahara Chan Min Yoo Boo-Keun Khim Department of Oceanography Pusan National UniversityBusan 46241South Korea Deep-sea Mineral Resources Research Center Korea Institute of Ocean Science&TechnologyBusan 49111South Korea Division of Glacial Environment Research Korea Polar Research InstituteIncheon 21990South Korea Center for Advanced Marine Research Kochi UniversityKochi 783-8502Japan Graduate School of Science and Engineering for Research University of ToyamaToyama 930-8555Japan Department of Earth and Planetary Sciences Nagoya UniversityNagoya 464-8601Japan

The orbital-scale variability of the Indian summer monsoon(ISM)has been influenced by multiple factors,such as atmospheric CO_(2)concentration,global ice volume,and *** for weathering activity and paleo-productivity provide potential insights into the driving forces of its *** documented multi-proxy data at IODP Site U1445,located in the Mahanadi Basin of the northwestern Bay of Bengal,to find out ISM variability over the last 200 *** proxy records,such as Nd/Sr isotopes of detrital particles,clay mineral compositions of the fine-grained sediments,biogenic opal and CaCO_(3),organic carbon contents,and carbon isotopes of organic matter,represent sediment sources,weathering patterns,and paleo-productivity related to the ISM *** Nd/Sr isotope data and clay mineral compositions suggest that the sediments at Site U1445 originated mainly from the Ganges,Brahmaputra,and Meghna rivers without dramatic provenance change between the glacial and interglacial *** weathering activity inferred from clay mineral compositions and the paleo-productivity shift reconstructed by biogenic opal and CaCO_(3)contents suggest that the land-sea interactions were closely linked to the ISM precipitation between the glacial and interglacial *** precipitation by the strong ISM resulted in intense chemical weathering and dominant biogenic opal deposition during the interglacial *** contrast,low precipitation by the weak ISM led to reduced chemical weathering and predominant CaCO_(3)deposition during the glacial ***,the ISM variability driving the land-sea interactions in the Mahanadi Basin was modulated by the Indonesian throughflow(ITF).Our study emphasizes the role of low-latitude forcing of climatic changes in the strong relationship between the ISM and ITF over orbital periods,providing a base for future investigations.

关键词： Provenance Weathering activity Paleo-productivity Indian summer monsoon Bay of Bengal Indonesian throughflow

Block Verification Mechanism Based on Zero-Knowledge Proof in Blockchain

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Computer Systems Science & Engineering 2023年第5期45卷 1805-1819页

作者： Jin Wang Wei Ou Osama Alfarraj Amr Tolba Gwang-Jun kim Yongjun Ren School of Computer&Communication Engineering Changsha University of Science&TechnologyChangsha410004China Department of Computer Science Community CollegeKing Saud UniversityRiyadh11437Saudi Arabia Department of Computer Engineering Chonnam National UniversityGwangju61186Korea School of Computer Science Engineering Research Center of Digital Forensics of Ministry of EducationNanjing University of Information Science&TechnologyNanjing210044China

Since transactions in blockchain are based on public ledger verification,this raises security concerns about privacy *** it will cause the accumulation of data on the chain and resulting in the low efficiency of block verification,when the whole transaction on the chain is *** order to improve the efficiency and privacy protection of block data verification,this paper proposes an efficient block verification mechanism with privacy protection based on zeroknowledge proof(ZKP),which not only protects the privacy of users but also improves the speed of data block *** is no need to put the whole transaction on the chain when verifying block *** just needs to generate the ZKP and root hash with the transaction information,then save them to the smart contract for ***,the ZKP verification in smart contract is carried out to realize the privacy protection of the transaction and efficient verification of the *** the data is validated,the buffer accepts the complete transaction,updates the transaction status in the cloud database,and packages up the ***,the ZKP strengthens the privacy protection ability of blockchain,and the smart contracts save the time cost of block verification.

关键词： Blockchain privacy protection zero-knowledge proof smart contract

Resistivity of reservoir sandstones and organic rich shales on the Barents Shelf: Implications for interpreting CSEM data

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Geoscience Frontiers 2021年第6期12卷 411-427页

作者： kim Senger Thomas Birchall Peter Betlem Kei Ogata Sverre Ohm Snorre Olaussen Renate S.Paulsen Department of Arctic Geology The University Centre in SvalbardLongyearbyenNorway Department of Geosciences University of OsloOsloNorway Department of Earth Science Vrije UniversiteitAmsterdamNetherlands Now at Dipartimento di Scienze Della Terra Dell’Ambiente e Delle Risorse(DISTAR)Universita Degli Studi diNapoli Federico IINapoliItaly Department of Energy Resources University of StavangerStavangerNorway Department of Geosciences University of Tromsø–the Arctic University of NorwayTromsøNorway

Marine controlled source electromagnetic(CSEM) data have been utilized in the past decade during petroleum exploration of the Barents Shelf, particularly for de-risking the highly porous sandstone reservoirs of the Upper Triassic to Middle Jurassic Realgrunnen Subgroup. In this contribution we compare the resistivity response from CSEM data to resistivity from wireline logs in both water-and hydrocarbon-bearing wells. We show that there is a very good match between these types of data, particularly when reservoirs are shallow. CSEM data, however, only provide information on the subsurface resistivity. Careful, geology-driven interpretation of CSEM data is required to maximize the impact on exploration success. This is particularly important when quantifying the relative resistivity contribution of high-saturation hydrocarbon-bearing sandstone and that of the overlying cap rock. In the presented case the cap rock comprises predominantly organic rich Upper Jurassic–Early Cretaceous shales of the Hekkingen Formation(i.e. a regional source rock). The resistivity response of the reservoir and its cap rock become merged in CSEM data due to the transverse resistance equivalence principle. As a result of this, it is imperative to understand both the relative contributions from reservoir and cap rock, and the geological significance of any lateral resistivity variation in each of the units. In this contribution, we quantify the resistivity of organic rich mudstone, i.e. source rock, and reservoir sandstones, using 131 exploration boreholes from the Barents Shelf. The highest resistivity(>10,000 Ωm) is evident in the hydrocarbon-bearing Realgrunnen Subgroup which is reported from 48 boreholes, 43 of which are used for this study. Pay zone resistivity is primarily controlled by reservoir quality(i.e. porosity and shale fraction) and fluid phase(i.e. gas, oil and water saturation).In the investigated wells, the shale dominated Hekkingen Formation exhibits enhanced resistivity c

关键词： Barents Shelf Petroleum Electromagnetic Exploration Source rocks