检索结果-南通市图书馆

High Power Laser Science and Engineering 2024年第1期12卷 60-73页

作者： Shikha Bhadoria mattias marklund Christoph H.Keitel Max-Planck-Institut für Kernphysik HeidelbergGermany Department of Physics University of GothenburgGöteborgSweden

The impact of radiation reaction and Breit±Wheeler pair production on the acceleration of fully ionized carbon ions driven by an intense linearly polarized laser pulse has been investigated in the ultra-relativistic transparency *** initial expectations, the radiation reaction and pair production at ultra-high laser intensities are found to enhance the energy gained by the ions. The electrons lose most of their transverse momentum, and the additionally produced pair plasma of Breit±Wheeler electrons and positrons co-streams in the forward direction as opposed to the existing electrons streaming at an angle above zero degree. We discuss how these observations could be explained by the changes in the phase velocity of the Buneman instability, which is known to aid ion acceleration in the breakout afterburner regime, by tapping the free energy in the relative electron and ion streams. We present evidence that these non-classical effects can further improve the highest carbon ion energies in this transparency regime.

关键词： ion acceleration quantum electrodynamic effects

Distribution and leaching characteristics of trace elements in ashes as a function of different waste fuels and incineration technologies

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2015年第10期27卷 9-21页

作者： Naeem Saqib mattias Backstrom Department of Science and Technology Man-Technology-Environment Research Centreorebro University

Impact of waste fuels（virgin/waste wood, mixed biofuel（peat, bark, wood chips） industrial,household, mixed waste fuel） and incineration technologies on partitioning and leaching behavior of trace elements has been investigated. Study included 4 grate fired and 9 fluidized boilers. Results showed that mixed waste incineration mostly caused increased transfer of trace elements to fly ash; particularly Pb/Zn. Waste wood incineration showed higher transfer of Cr,As and Zn to fly ash as compared to virgin wood. The possible reasons could be high input of trace element in waste fuel/change in volatilization behavior due to addition of certain waste fractions. The concentration of Cd and Zn increased in fly ash with incineration *** concentration in ashes decreased in order of Zn 〉 Cu 〉 Pb 〉 Cr 〉 Sb 〉 As 〉 Mo. The concentration levels of trace elements were mostly higher in fluidized boilers fly ashes as compared to grate boilers（especially for biofuel incineration）. It might be attributed to high combustion efficiency due to pre-treatment of waste in fluidized boilers. Leaching results indicated that water soluble forms of elements in ashes were low with few *** levels in ash and ash matrix properties（association of elements on ash particles）are crucial parameters affecting leaching. Leached amounts of Pb, Zn and Cr in 〉50% of fly ashes exceeded regulatory limit for disposal. 87% of chlorine in fly ashes washed out with water at the liquid to solid ratio 10 indicating excessive presence of alkali metal chlorides/alkaline earths.

关键词： Incineration residues Leaching behavior Biofuel incineration Metal distribution Waste incineration

A hybrid genetic algorithm to optimize device allocation in industrial Ethernet networks with real-time constraints

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science C(Computers and Electronics) 2011年第12期12卷 965-975页

作者： Lei ZHANG mattias LAMPE Zhi WANG State Key Laboratory of Industrial Control Technology Zhejiang University Hangzhou 310027 China Corporate Technology Siemens Ltd. Beijing 100102 China

With the advance of automation technology,the scale of industrial communication networks at field level is *** real-time performance of these networks is therefore becoming an increasingly difficult *** paper addresses the optimization of device allocation in industrial Ethernet networks with real-time constraints (DAIEN-RC).Considering the inherent diversity of real-time requirements of typical industrial applications,a novel optimization criterion based on relative delay is proposed.A hybrid genetic algorithm incorporating a reduced variable neighborhood search (GA-rVNS) is developed for *** results show that the proposed novel scheme achieves a superior performance compared to existing schemes,especially for large scale industrial networks.

关键词： Optimization Real-time Industrial Ethernet Device allocation Steady-state genetic algorithm Variable neighbor-hood search

Rough operators: sphingomyelinase inhibitors spike NK cells to kill cancer

在线全文

学校读者我要写书评

暂无评论

Signal Transduction and Targeted Therapy 2023年第9期8卷 3892-3893页

作者： mattias Carlsten Yenan T.Bryceson Center for Hematology and Regenerative Medicine Department of Medicine HuddingeKarolinska Institute14157 StockholmSweden Center for Cell Therapy and Allogeneic Stem Cell Transplantation Karolinska Comprehensive Cancer CenterKarolinska University Hospital17176 StockholmSweden Division of Clinical Immunology and Transfusion Medicine Karolinska University Hospital17176 StockholmSweden Broegelmann Research Laboratory Department of Clinical SciencesUniversity of Bergen5030 BergenNorway

In a recent study published in Nature Immunology,Zheng et *** that intratumoral NK cells were smooth and rounded as opposed to the typical vili-rich,rougher surface of normal NK cells.1 This phenotype was linked to a specific deficit in membrane sphingomyelin lipids that impaired tumor cell ***,results suggested that NK cell-mediated immunosurveillance of cancer can be rescued by blocking enzymes that degrade sphingomyelin,uncovering a potential novel‘metabolic immune checkpoint’for which pharmacological inhibition holds promise for cancer *** cells are generally considered a subset of innate lymphoid cells that mediate cellular cytotoxicity.

关键词： myelin impaired cancer

HOW ARE PRODUCT-SERVICE COMBINED OFFERS PROVIDED IN GERMANY AND ITALY?ANALYSIS WITH COMPANY SIZES AND COUNTRIES

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 Systems Science and Systems Engineering 2008年第3期17卷 367-381页

作者： Tomohiko SAKAO Nicola NAPOLITANO Massimo TRONCI Erik SUNDIN mattias LINDAHL Institute for Product Development and Machine Elements Darmstadt University of TechnologyGermany Department of Management and Engineering Linkping UniversitySweden Department of Mechanics and Aeronautics University of Rome"La Sapienza"Italy

A new business concept that offers products and services in a different way of traditional product-sales businesses is getting more attention especially in manufacturing industries. This paper investigates how this new business by means of integration of products and services is achieved in Germany and Italy. In addition, it analyzes the differences according to the company sizes. The results include that this type of business is in many cases motivated by their focus on customers and often consists of physical products and their maintenance. The Italian companies, as opposed to the German ones, often design their physical products specifically for this type of offers. From the analysis based on the size difference, small companies are found to achieve specific design for this type of offers while owning physical products. There do not seem to be any established methods or tools developed to support the development of such offers and within such methods/tools there would be room for more adaptation in form of physical product design.

关键词： Product-service combination functional sales integrated product service engineering service management product design maintenance

Ascites and complications: getting to the root of the trouble

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary Surgery and Nutrition 2023年第1期12卷 124-127页

作者： mattias Mandorfer Benedikt Simbrunner Vienna Hepatic Hemodynamic Lab Division of Gastroenterology and HepatologyDepartment of Internal Medicine IIIMedical University of ViennaViennaAustria

After nearly a decade,the American Association for the Study of Liver Diseases has updated its guidance on the diagnosis,evaluation,and management of ascites and its complications(1).Ascites is the most common first hepatic decompensating event,thereby denoting the transition to from compensated advanced chronic liver disease(cACLD)to decompensated cirrhosis-(literally)a watershed moment in the natural history of liver disease(2).

关键词： Cirrhosis portal hypertension transjugular intrahepatic portosystemic shunt(TIPS) albumin

Gut-liver axis signaling in portal hypertension

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39期25卷 5897-5917页

作者： Benedikt Simbrunner mattias Mandorfer Michael Trauner Thomas Reiberger Department of Internal Medicine Ⅲ Division of Gastroenterology and HepatologyMedical University of ViennaVienna 1180Austria Vienna Hepatic Hemodynamic Lab Medical University of ViennaVienna 1180Austria

Portal hypertension(PHT)in advanced chronic liver disease(ACLD)results from increased intrahepatic resistance caused by pathologic changes of liver tissue composition(structural component)and intrahepatic vasoconstriction(functional component).PHT is an important driver of hepatic decompensation such as development of ascites or variceal *** and an impaired intestinal barrier in ACLD facilitate translocation of bacteria and pathogen-associated molecular patterns(PAMPs)that promote disease progression via immune system activation with subsequent induction of proinflammatory and profibrogenic *** portal venous blood flow represents a critical pathophysiological mechanism linking PHT to increased intestinal permeability:The intestinal barrier function is affected by impaired microcirculation,neoangiogenesis,and abnormal vascular and mucosal *** close bidirectional relationship between the gut and the liver has been termed“gut-liver axis”.Treatment strategies targeting the gut-liver axis by modulation of microbiota composition and function,intestinal barrier integrity,as well as amelioration of liver fibrosis and PHT are supposed to exert beneficial *** activation of the farnesoid X receptor in the liver and the gut was associated with beneficial effects in animal experiments,however,further studies regarding efficacy and safety of pharmacological FXR modulation in patients with ACLD are *** this review,we summarize the clinical impact of PHT on the course of liver disease,discuss the underlying pathophysiological link of PHT to gut-liver axis signaling,and provide insight into molecular mechanisms that may represent novel therapeutic targets.

关键词： Cirrhosis Portal hypertension Gut-liver axis Bacterial translocation Intestinal barrier Farnesoid X receptor

Sorption of Perfluorooctane sulfonate(PFOS) including its isomers on hydrargillite as a function of pH,humic substances and Na2SO4

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 Environmental Sciences 2022年第1期34卷 263-272页

作者： Jean-Noel Uwayezu Leo W.Y.Yeung mattias Bäckström Man-Technology-Environment Research Centre(MTM) Örebro University70182ÖrebroSweden

Perfluorooctane sulfonate(PFOS)is a persistent organic pollutant(POP)and emergent contaminant that are widespread in the *** the mechanisms controlling the distribution of PFOS and its isomers between hydrargillite and the water phase is important in order to study their redistribution and mobility in the *** study investigated the effects of pH,humic acid,fulvic acid and Na_(2)SO_(4) on sorption of PFOS isomers to hydrargillite.A mixture of PFOS isomers was spiked into water and hydrargillite was added to the system and shaken for one day;the system was tested with different aqueous *** of PFOS isomers in the aqueous phase were quantified using an ultra-performance liquid chromatograph coupled to a triple quadrupole mass *** results showed that the distribution coefficients of PFOS isomers were found to be 0.76,0.71,0.93 and 0.90 at pH 6.5,for 3-/4-/5-PFOS,6-/2-PFOS,L-PFOS and total PFOS *** distribution coefficients increased at lower pH and decreased at alkaline *** presence of humic substances(HS)increased the sorption slightly at the environmental pH of 6.5,although a competition effect was observed during acidic conditions.A tendency of PFOS distribution to hydrargillite in the presence of Na_(2)SO_(4) was like its behavior in the presence of HS although the mechanisms behind the sorption were interpreted *** study revealed that L-PFOS was readily sorbed when no other chemicals were added or in 20 mg/L FA or 100 mg/L Na_(2)SO_(4).We suggest that an increase in PFOS sorption in the presence of HS may be due to hydrophobic mechanisms while Na_(2)SO_(4) contributed to increased sorption through ionic strength effects.

关键词： Hydrargillite Perfluorooctane sulfonate Sorption Humic substances Electrostatic,Ionic strength

Alcohol consumption in non-alcoholic fatty liver disease—harmful or beneficial?

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary Surgery and Nutrition 2019年第3期8卷 311-313页

作者： Stergios Kechagias Julia Blomdahl mattias Ekstedt Department of Medical and Health Sciences Linkoping UniversityLinkopingSweden

Non-alcoholic fatty liver disease(NAFLD)is the most common liver disease with an estimated global prevalence of 25%.Approximately 5%of NAFLD patients have cirrhosis and currently NAFLD is the second most common etiology among adults awaiting liver transplant in the United *** the Western world alcohol overconsumption is the leading cause for advanced decompensated liver disease but whether moderate alcohol consumption,compatible with the diagnosis of NAFLD,plays a role for development of liver-related complications in NAFLD is *** NAFLD entails a clinically significant risk for encountering complications of advanced liver disease,cardiovascular disease(CVD)is the leading cause of mortality and morbidity among subjects with *** and CVD share many common risk factors,for instance components of the metabolic *** has been reported that modest alcohol consumption is associated with beneficial effects on risk of metabolic syndrome and insulin resistance,which are crucial for the development and progression of NAFLD.

关键词： diagnosis mortality alcohol

Luminescent line art by direct-write patterning

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Light(Science & Applications) 2016年第1期5卷 518-521页

作者： Erik mattias Lindh Andreas Sandström Mats Roland Andersson Ludvig Edman The Organic Photonics and Electronics Group UmeaUniversityUmeaSweden LunaLEC AB UmeaSweden Future Industries Institute University of South AustraliaMawson LakesSA 5095Australia

We present a direct-write patterning method for the realization of electroluminescent(EL)line art using a surface-emissive light-emitting electrochemical cell with its electrolyte and EL material separated into a bilayer *** line-art emission is achieved through subtractive patterning of the electrolyte layer with a stylus,and the single-step patterning can be either manual for personalization and uniqueness or automated for high throughput and *** demonstrate that the light emission is effectuated by cation-assisted electron injection in the patterned regions and that the resulting emissive lines can be as narrow as a few *** versatility of the method is demonstrated through the attainment of a wide range of light-emission patterns and colors using a variety of different *** that this low-voltage-driven and easy-to-modify luminescent line-art technology could be of interest for emerging applications,such as active packaging and personalized gadgets.

关键词： direct-write patterning light-emitting electrochemical cell luminescent line art organic electronics