检索结果-南通市图书馆

Photonics Research 2018年第3期6卷 214-219页

作者： HEASlN Ko BYUNG-SEOK CHOI joong-seon choe KAP-joong KIM JONG-Hol KIM CHUN JU YOUN Photonic/Wireless Convergence Components Research Division Electronics and Telecommunications Research InstituteDaejeon 34129South Korea School of Advanced Device Technology University of Science&TechnologyDaejeon 34113South Korea

Side channel effects such as temporal disparity and intensity fluctuation of the photon pulses caused by random bit generation with multiple laser diodes in high-speed polarization-based BB84 quantum key distribution(QKD) systems can be eliminated by increasing the DC bias current condition. However, background photons caused by the spontaneous emission process under high DC bias current degrade the performance of QKD systems. In this study, we investigated the effects of spontaneously emitted photons on the system performance in a high-speed QKD system at a clock rate of 400 MHz. Also, we show further improvements in the system performance without side channel effects by utilizing the temporal filtering technique with real-time fieldprogrammable gate array signal processing.

关键词： QKD High-speed and high-performance polarization-based quantum key distribution system without side channel effects caused by multiple lasers

Restimate:Recovery Estimation Tool for Resilience Planning

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Safety Science and Resilience 2024年第1期5卷 47-63页

作者： Scott Miles Megan Ly Nick Terry Youngjun choe Department of Human Centered Design&Engineering Campus Box 352315University of WashingtonSeattleWA 98195United States of America Department of Industrial&Systems Engineering Box 352650University of WashingtonSeattleWA 98195United States of America

The *** Institute of Standards and Technology(NIST)published the Community Resilience Planning Guide in *** NIST Guide advocates for a participatory process for developing a performance measurement framework for the jurisdiction’s resilience against a scenario *** framework centers around tables of expected and desired recovery times for selected community assets,such as electricity,water,and natural gas *** NIST Guide does not provide a method for estimating the expected recovery ***,building high-fidelity computer models for such estimations requires substantial resources that even larger ju-risdictions cannot *** most promising approach to recovery time estimation is to systematically use data elicited from people to tap into the wisdom of the(knowledgeable)*** paper describes a novel research-through-design project to enable the computer-supported elicitation of recovery time series *** work is the first in the literature to examine people’s ability to estimate recovery curves and how design in-fluences such *** main contribution to resilience planning is three-fold:development of a new elicitation tool called Restimate,understanding its potential user base,and providing insights into how it can facilitate resilience *** is the first tool to enable evidence-based expert elicitation in any community with limited resources for resilience *** resilience planning,those who facilitate high-stakes planning activities under large uncertainties(e.g.,mission-critical system design and planning)will benefit from a similar research-through-design process.

关键词： expert elicitation disaster natural hazard infrastructure community resilience restoration user-centered design computer-supported cooperative work

Antimicrobial stewardship and targeted therapies in the changing landscape of maternal sepsis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Intensive Medicine 2024年第1期4卷 46-61页

作者： Nishel M Shah Esmita Charani Damien Ming Fook-choe Cheah Mark R Johnson Department of Metabolism Digestion and ReproductionImperial College LondonChelsea and Westminster HospitalLondonUK Health Protection Research Unit in Healthcare Associated Infection and Antimicrobial Resistance Imperial College LondonLondonUK Division of Infectious Diseases and HIV Medicine Department of MedicineGroote Schuur HospitalUniversity of Cape TownCape TownSouth Africa Department of Infectious Diseases Imperial College LondonChelsea and Westminster HospitalLondonUK Department of Paediatrics Faculty of MedicineUniversiti Kebangsaan Malaysia Medical CentreKuala LumpurMalaysia

Pregnant and postnatal women are a high-risk population particularly prone to rapid progression to sepsis with significant morbidity and mortality ***,severe maternal infections can have a serious detrimental impact on neonates with almost 1 million neonatal deaths annually attributed to maternal infection or *** this review we discuss the susceptibility of pregnant women and their specific physiological and immunological adaptations that contribute to their vulnerability to sepsis,the implications for the neonate,as well as the issues with antimicrobial stewardship and the challenges this poses when attempting to reach a balance between clinical care and urgent ***,we review advancements in the development of pregnancy-specific diagnostic and therapeutic approaches and how these can be used to optimize the care of pregnant women and neonates.

关键词： Sepsis Pregnancy Immunology Cardiovascular Personalised medicine Antibiotic stewardship

Production of chitosan-based composite film reinforced with lignin-rich lignocellulose nanofibers from rice husk

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Bioresources and Bioproducts 2024年第2期9卷 174-184页

作者： Hye Jee Kang Yeon Ju Lee Jin Kyoung Lee Irnia Nurika Sri Suhartini Deokyeong choe Dong Hyun Kim Hoon Choi Natasha P.Murphy Ho Yong Kim Young Hoon Jung School of Food Science and Biotechnology Kyungpook National UniversityDaegu 41566Republic of Korea CPR S&T Co. Ltd.Gunpo 15880Republic of Korea Department of Agroindustrial Technology Faculty of Agricultural TechnologyUniversitas BrawijayaMalang 65145Indonesia Renewable Resources and Enabling Sciences Center National Renewable Energy LaboratoryGoldenCO 80401United States Center for Bio-based Chemistry Korea Research Institute of Chemical TechnologyUlsan 44429Republic of Korea

Lignocellulosic nanofibers(LCNFs),implying lignin-containing cellulose fibers,maintain the prop-erties of both lignin and cellulose,which are hydrophobic and hydrophilic,*** pres-ence of hydrophobic lignin in LCNFs is expected to be an economical and attractive option that can improve the thermal and mechanical properties of ***,this study was conducted to produce lignin-rich LCNFs from sugar-rich waste obtained from rice husks after acidic *** LCNFs were produced from the lignin-rich solid fractions obtained after pretreatment and enzymatic hydrolysis,which were then incorporated as an additive into a chitosan-based *** variations in lignin content in the range of approximately 50.6%-66.8%in differently obtained LCNFs gave significantly different optical strengths and mechanical *** controllable processes may allow for customized film ***,the glucose-rich liquid fractions obtained after pretreatment and enzymatic hydrolysis were used as a substrate for ethanol fermentation to achieve total utilization of rice husk biomass *** conclusion,the lignin-rich biomass fraction holds promise as a suitable material for chitosan-LCNF film and has the potential to increase the economic feasibility of the biomaterial industry.

关键词： Rice husk Lignocellulose nanofiber Lignin-based material Chitosan film Upcycling

Significance of dysplasia in bile duct resection margin in patients with extrahepatic cholangiocarcinoma:A retrospective analysis

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 Clinical Cases 2022年第10期10卷 3078-3087页

作者： Jung Wan choe Hyo Jung Kim Jae seon Kim Department of Internal Medicine Korea University Ansan HospitalKorea University College of MedicineAnsan 15355South Korea Department ofInternal Medicine Korea University Guro HospitalKorea University College of MedicineSeoul 08308South Korea Department ofInternal Medicine Korea University Guro Hospital2

BACKGROUND Radical resection is the only indicator associated with survival in extrahepatic cholangiocarcinoma(EHCC).However,limited data are available regarding the implications of dysplasia at the resection margin following *** To evaluate the prognostic significance of dysplasia-positive margins in patients diagnosed with *** We reviewed the records of patients who had undergone surgery for EHCC with curative intent between January 2013 and July *** retrospectively analyzed the clinicopathological data of 116 patients followed for longer than 3 *** status of resection margin was used to classify patients into negative low-grade dysplasia(LGD)and high-grade dysplasia(HGD)/carcinoma in situ(CIS)*** Based on postoperative status,72 patients underwent resection with negative margins,19 had LGD-positive margins,and 25 showed HGD/CIS-positive *** mean survival rates of the patients with negative margins,LGD margins,and HGD/CIS margins were 49.1±4.5,47.3±6.0,and 20.8±4.4 mo,respectively(P70 years and HGD/CIS-positive margins were significant independent factors for survival(hazard ratio=1.90 and 2.47,respectively).CONCLUSION HGD/CIS margin in resected EHCC is associated with a poor ***,the LGDpositive resection margin is not a significant indicator of survival in patients with EHCC.

关键词： Dysplasia Cholangiocarcinoma Survival Extrahepatic cholangiocarcinoma Low-grade dysplasia High-grade dysplasia

Data-driven sparse polynomial chaos expansion for models with dependent inputs

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Safety Science and Resilience 2023年第4期4卷 358-365页

作者： Zhanlin Liu Youngjun choe Industrial&Systems Engineering University of WashingtonSeattleWAUSA

Polynomial chaos expansions(PCEs)have been used in many real-world engineering applications to quantify how the uncertainty of an output is propagated from inputs by decomposing the output in terms of polynomials of the *** for models with independent inputs have been extensively explored in the ***,different approaches have been proposed for models with dependent inputs to expand the use of PCEs to more real-world *** approaches include building PCEs based on the Gram–Schmidt algorithm or transforming the dependent inputs into independent ***,the two approaches have their limitations regarding computational efficiency and additional assumptions about the input distributions,*** this paper,we propose a data-driven approach to build sparse PCEs for models with dependent inputs without any distributional *** proposed algorithm recursively constructs orthonormal polynomials using a set of monomials based on their correlations with the *** proposed algorithm on building sparse PCEs not only reduces the number of minimally required observations but also improves the numerical stability and computational *** numerical examples are implemented to validate the proposed *** source code is made publicly available for reproducibility.

关键词： Uncertainty quantification Polynomial chaos expansion Sparse polynomial chaos expansion Gram-Schmidt orthogonalization

Survival improvement and prognostic factors in recent management of extrahepatic cholangiocarcinoma:A single-center study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Hepatobiliary & Pancreatic Diseases International 2020年第2期19卷 153-156页

作者： Jung Wan choe Hyo Jung Kim Jae seon Kim Division of Gastroenterology Department of Internal MedicineKorea University Ansan HospitalKorea University College of Medicine516 Gojan-dongDanwon-guAnsan-siGyeonggi-do15355Korea Division of Gastroenterology Department of Internal MedicineKorea University Guro HospitalKorea University College of Medicine148 Gurodong-roGuro-guSeoul 08308Korea

Background:Cholangiocarcinoma was considered as a dismal disease with very poor prognosis until *** is increasingly found due to increased life *** surgical and medical management were advanced recently,data on the prognosis,especially extrahepatic cholangio-carcinoma(ECC),were *** study aimed to identify clinicopathologic features and prognosis of patients with ***:Patients followed up and diagnosed with ECC between January 2014 and December 2016 at a tertiary hospital were included,whereas those with intrahepatic cholangiocarcinoma,gallbladder cancer,and ampullary cancer were ***:A total of 83 patients were followed after the treatment(49 men and 34 women;median age 73.3 years).Cancer location was classified as distal common bile duct(25 patients),proximal com-mon bile duct(24 patients),common hepatic duct(20 patients),and hilar(14 patients).About 14.5%of patients had history of another malignant neoplasm,and 24.1%patients had chronic ***-cal resection was performed in 54 patients(65%)and dysplasia was combined in 63%(34/54).Adjuvant chemotherapy was performed in 54%(29/54),but only 7 underwent palliative chemotherapy in 29 non-surgical *** median overall survival in all patients was 30.9 *** analyzing the treatment modality,median survival of adjuvant chemotherapy,surgery only,palliative chemotherapy,and support-ive care groups were 42.9,30.9,12.0,and 8.9 months,respectively(P<0.05).In the Cox regression analy-sis of survival,age,surgical resection,chemotherapy,and comorbidity were significant prognostic factors,and the comorbidity was the only significant prognostic factor in the multivariable analysis(hazard ratio[HR]=2.80;95%CI:1.32–5.95;P=0.007).In a subgroup analysis of surgical patients,the presence of dysplasia was a favorable prognostic factor in the multivariable analysis(HR=0.29;95%CI:0.09–0.91;P=0.033).Conclusions:The overall survival of patients with ECC wa

关键词： Cholangiocarcinoma Survival Prognosis

Impact of clay particle reattachment on suffusion of sand-clay mixtures

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Rock Mechanics and Geotechnical Engineering 2023年第10期15卷 2720-2730页

作者： Jongmuk Won Yongjoon choe Yerim Yang Hangseok Choi Department of Civil and Environmental Engineering University of UlsanDaehak-ro 93Nam-guUlsan680-749South Korea School of Civil Environmental and Architectural EngineeringAnam-dong 5-gaKorea UniversitySeoul136-713South Korea

The detached clay particles directly filtrated through the sand-clay mixture lead to suffusion;however,if the detached clay particles are subjected to reattachment,the degree of suffusion may be less *** study investigates the impact of clay particle reattachment on suffusion of sand-clay mixtures through laboratory soil-column *** observed breakthrough curves(BTCs)of kaolinite,illite,and montmorillonite for 5 different column lengths(3 in,6 in,9 in,12 in,and 18 in;1 in=2.54 cm)indicated that a higher breakthrough concentration was observed as the column length(L)decreased for kaolinite and illite,whereas a reverse trend was observed for *** addition,the increase in the fraction of filtrated clay particles(Me)with an increase in L(Me=10.42%for L=3 in and Me=3.59%for L=18 in)for the sand-illite mixture indicated that the reattachment effect became more significant as the travel length of detached clay particles *** observed BTCs,retention profiles after injection,and fraction of filtrated clay presented herein suggest the need to incorporate the reattachment effect when assessing the suffusion of clay-containing soils.

关键词： Suffusion Reattachment Sandeclay mixture Ionic concentration Column length

Clinical outcomes of endoscopic papillectomy of ampullary adenoma: A multi-center study

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 2022年第17期28卷 1845-1859页

作者： seong Ji Choi Hong Sik Lee Jiyeong Kim Jung Wan choe Jae Min Lee Jong Jin Hyun Jai Hoon Yoon Hyo Jung Kim Jae seon Kim Ho Soon Choi Department of Internal Medicine Hanyang University College of MedicineSeoul 04763South Korea Division of Gastroenterology and Hepatology Department of Internal MedicineKorea University College of MedicineSeoul 02841South Korea Lab of Biostatistical Consulting and Research Medical Research Collaborating CenterIndustry-University Cooperation FoundationHanyang UniversitySeoul 04763South Korea

BACKGROUND Ampullary adenoma is a rare premalignant lesion,but its incidence is *** papillectomy has become the first treatment of choice for ampullary adenomas due to its safety and effectiveness,thereby replacing surgical ***,recurrence rates and adverse events after endoscopic papillectomy were reported in up to 30%of *** To review the long-term outcomes of endoscopic papillectomy and investigate the factors that affect these *** We retrospectively analyzed the data of patients who underwent endoscopic papillectomy for ampullary adenoma at five tertiary hospitals between 2013 and *** evaluated clinical outcomes and their risk *** definitions of outcomes were as follow:(1)curative resection:complete endoscopic resection without recurrence;(2)endoscopic success:treatment of ampullary adenoma with endoscopy without surgical intervention;(3)early recurrence:reconfirmed adenoma at the first endoscopic surveillance;and(4)late recurrence:reconfirmed adenoma after the first endoscopic *** A total of 106 patients were included for *** the included patients,81(76.4%)underwent curative resection,99(93.4%)had endoscopic success,showing that most patients with noncurative resection were successfully managed with *** patients(15.1%)had piecemeal resection,22 patients(20.8%)had shown positive/uncertain resection margin,11 patients(16.1%)had an early recurrence,13 patients(10.4%)had a late recurrence,and 6 patients(5.7%)had a *** multivariate analysis,a positive/uncertain margin[Odds ratio(OR)=4.023,P=0.048]and piecemeal resection(OR=6.610,P=0.005)were significant risk factors for early and late recurrence,*** resection was also a significant risk factor for non-curative resection(OR=5.424,P=0.007).Twenty-six patients experienced adverse events(24.5%).CONCLUSION Endoscopic papillectomy is a safe and effective treatment for ampullary ***

关键词： Endoscopic papillectomy Ampullary adenoma Clinical outcome Recurrence Adverse event

Routine screening for classical azoospermia factor deletions of the Y chromosome in azoospermic patients with Klinefelter syndrome

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2007年第6期9卷 815-820页

作者： Jin Ho choe Jong Woo Kim joong Shik Lee Ju Tae Seo Department of Urology Cheil General Hospital Kwandong University College of Medicine Seoul 100-380 Korea

Aim： To evaluate the occurrence of classical azoospermia factor （AZF） deletions of the Y chromosome as a routine examination in azoospermic subjects with Klinefelter syndrome （KS）. Methods： Blood samples were collected from 95 azoospermic subjects with KS （91 subjects had a 47,XXY karyotype and four subjects had a mosaic 47,XXY/46, XY karyotype） and a control group of 93 fertile men. The values of testosterone, follicle stimulating hormone （FSH） and luteinizing hormone （LH） were measured. To determine the presence of Y chromosome microdeletions, polymerase chain reaction （PCR） of five sequence-tagged site primers （sY84, sY 129, sY 134, sY254, sY255） spanning the AZF region, was performed on isolated genomic DNA. Results： Y chromosome microdeletions were not found in any of the 95 azoosperrnic subjects with KS. In addition, using similar conditions of PCR, no microdeletions were observed in the 93 fertile men evaluated. The level of FSH in KS subjects was higher than that in fertile men （38.2 ± 10.3 mIU/mL vs. 5.4 ±2.9 mIU/mL, P 〈 0.001） and the testosterone level was lower than that in the control group （1.7 ±0.3 ng/mL vs. 4.3 ± 1.3 ng/mL, P 〈 0.001）. Conclusion： Our data and review of the published literature suggest that classical AZF deletions might not play a role in predisposing genetic background for the phenotype of azoospermic KS subjects with a 47,XXY karyotype. In addition, routine screening for the classical AZF deletions might not be required for these subjects. Further studies including partial AZFc deletions （e.g. gr/gr or b2/b3） are necessary to establish other mechanism underlying severe spermatogenesis impairment in KS.

关键词： Y chromosome chromosome deletion Klinefelter syndrome azoospermia