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1141篇 您的检索式:作者名="Grabowsky"
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1Toward commercial realization of quantum dot based white light-emitting diodes for general illumination显示文摘We demonstrate the first commercial production–ready white light-emitting diodes(LEDs)for the general illumination market with red colloidal quantum dots(QDs)applied in an on–chip configuration.We show the red QDs with tunable peak emission and narrow full width at half-maximum in combination with a conventional phosphor material can lead to LED conversion efficiency improvements of 5% to 15% over commercial phosphor based LEDs at correlated color temperatures(CCTs)ranging from 5000 to 2700 K.Furthermore,the challenges associated with reliability under high temperature,high blue flux intensity,and high humidity operation have been overcome to meet consumer market requirements.Finally,a demonstrator lamp at 3000 K color temperature and 90 color rendering index(CRI)with QD based LEDs show a larger efficiency gain up to 17%,attributed to the reduced blue LED droop from the lower drive current and the lower heat sink temperature when compared to a standard phosphor based LED lamp output.KEN TSHIMIZU MARCEL BOHMER DANIEL ESTRADA SUMIT GANGWAL STEFAN GRABOWSKI HELMUT BECHTEL EDWARD KANG KENNETH JVAMPOLA DANIELLE CHAMBERLIN OLEG BSHCHEKIN JYOTI BHARDWAJ 2017Photonics Research2017,5,2:5
2The zero-dimensional model of the scavenging process in the opposed-piston two-stroke aircraft diesel engine显示文摘The analysis of the scavenging process in two-stroke engines is important in terms of achieved performance and emission of toxic substances.The amount of mass of air used for the scavenging process and the amount mass of gas retained in the cylinder affect engine effi-ciency.When designing two-stroke engines,the most efficient charge exchange process defined by the scavenging efficiency parameter is desirable.The process of charge exchange in a twostroke opposed-piston aircraft diesel engine based on the assumed scavenging model was analyzed in this work.The charge exchange process was performed by a mechanical centrifugal compressor.A zero-dimensional engine model created in the AVL BOOST program was used for the research.The simulation tests were performed for the selected operating conditions,i.e.maximum continuous power.The analysis of the charge exchange process was accompanied by obtaining the basic engine operating parameters from the simulation calculations.Ł.Grabowski K.Pietrykowski P.Karpinski 2019Propulsion and Power Research2019,8,4:4
3Magnetic Moment Tensor Potentials for collinear spin-polarized materials reproduce different magnetic states of bcc Fe显示文摘We present the magnetic Moment Tensor Potentials(mMTPs),a class of machine-learning interatomic potentials,accurately reproducing both vibrational and magnetic degrees of freedom as provided,e.g.,from first-principles calculations.The accuracy is achieved by a two-step minimization scheme that coarse-grains the atomic and the spin space.The performance of the mMTPs is demonstrated for the prototype magnetic system bcc iron,with applications to phonon calculations for different magnetic states,and molecular-dynamics simulations with fluctuating magnetic moments.Ivan Novikov Blazej Grabowski Fritz Körmann Alexander Shapeev 2022npj Computational Materials2022,,1:4
4Corona Above Water Reactor for Systematic Study of Aqueous Phenol Degradation显示文摘L. R. Grabowski E. M. Veldhuizen A. J. M. Pemen W. R. Rutgers 2006Plasma Chemistry and Plasma Processing2006,,1:2
5A machine learning approach to model solute grain boundary segregation显示文摘Even minute amounts of one solute atom per one million bulk atoms may give rise to qualitative changes in the mechanical response and fracture resistance of modern structural materials.These changes are commonly related to enrichment by several orders of magnitude of the solutes at structural defects in the host lattice.The underlying concept—segregation—is thus fundamental in materials science.To include it in modern strategies of materials design,accurate and realistic computational modelling tools are necessary.However,the enormous number of defect configurations as well as sites solutes can occupy requires models which rely on severe approximations.In the present study we combine a high-throughput study containing more than 1 million data points with machine learning to derive a computationally highly efficient framework which opens the opportunity to model this important mechanism on a routine basis.Liam Huber Raheleh Hadian Blazej Grabowski Jörg Neugebauer 2018npj Computational Materials2018,,1:2
6Phonon broadening in high entropy alloys显示文摘Refractory high entropy alloys feature outstanding properties making them a promising materials class for next-generation hightemperature applications.At high temperatures,materials properties are strongly affected by lattice vibrations(phonons).Phonons critically influence thermal stability,thermodynamic and elastic properties,as well as thermal conductivity.In contrast to perfect crystals and ordered alloys,the inherently present mass and force constant fluctuations in multi-component random alloys(high entropy alloys)can induce significant phonon scattering and broadening.Despite their importance,phonon scattering and broadening have so far only scarcely been investigated for high entropy alloys.We tackle this challenge from a theoretical perspective and employ ab initio calculations to systematically study the impact of force constant and mass fluctuations on the phonon spectral functions of 12 body-centered cubic random alloys,from binaries up to 5-component high entropy alloys,addressing the key question of how chemical complexity impacts phonons.We find that it is crucial to include both mass and force constant fluctuations.If one or the other is neglected,qualitatively wrong results can be obtained such as artificial phonon band gaps.We analyze how the results obtained for the phonons translate into thermodynamically integrated quantities,specifically the vibrational entropy.Changes in the vibrational entropy with increasing the number of elements can be as large as changes in the configurational entropy and are thus important for phase stability considerations.The set of studied alloys includes MoTa,MoTaNb,MoTaNbW,MoTaNbWV,VW,VWNb,VWTa,VWNbTa,VTaNbTi,VWNbTaTi,HfZrNb,HfMoTaTiZr.Fritz Kormann Yuji Ikeda Blazej Grabowski Marcel H.F.Sluiter 2017npj Computational Materials2017,,1:2
7Effect of replacement of silica flour with silica fume on enginerring properties of oilwell cements at normal and elevated temperatures and pressure显示文摘Grabowski E Gillott J E 1989Cement and Concrete Research1989,19,3:2
8化疗所致恶心呕吐对复发性卵巢癌患者预后的影响:纳入1213例患者数据的meta分析结果显示文摘背景与目的 本研究旨在研究化疗所致恶心呕吐(chemotherapy-induced nausea and vomiting,CINV)对化疗药物剂量减少、中止以及患者生存获益的潜在影响。方法 本研究基于德国东北妇科肿瘤学会(North-Eastern German Society of Gynecological Oncology,NOGGO)开展的3项Ⅱ/Ⅲ期临床试验中的1213例复发性卵巢癌患者的原始数据,进行了个体病例数据的meta分析。通过Logistic回归和Cox回归分析,对年龄、ECOG评分、化疗周期数、复发次数、并发症以及不同研究等因素进行校正后,评估相应的比值比和风险比(hazard ratio,HR)。结果 大多数(58.1%)患者发生了恶心,且近三分之一(31.0%)的患者出现呕吐。CINV的发生与FIGO分期、分级、组织学以及复发次数无关;必须的化疗药物减量和中止化疗与恶心、呕吐的发生亦无相关性(P=0.88,P=0.39;P=0.25,P=0.54)。发生Ⅲ/Ⅳ级恶心呕吐患者的无进展生存期更短(P=0.02,Ⅲ/Ⅳ级恶心的HR=1.58,95%CI:1.14–2.20;P=0.02,Ⅲ/Ⅳ级呕吐的HR=1.67,95%CI:1.15–2.42)。发生Ⅲ/Ⅳ级恶心和呕吐的患者生存期较短(P <0.001,Ⅲ/Ⅳ级恶心的HR=2.35,95%CI:1.64–3.37;P <0.001,Ⅲ/Ⅳ级呕吐的HR=1.67,95%CI:1.15–2.42)。结论 CINV与复发性卵巢癌患者较差的预后显著相关,而与必须的化疗药物减量和中止无相关性。本研究强调CINV防治是早期最佳支持治疗的重要环节。Hannah Woopen R Richter R Chekerov G Inci S Alavi J P Grabowski J Sehouli 尹如铁(译) 2022癌症2022,41,6:2
9Prognostic value of nuclear survivin expression in oesophageal squamous cell carcinoma显示文摘Grabowski P Kuhnel T Mujr-Wilkenshoff F 2003Br J Cancer2003,88,1:1
10Mutations in the gene encoding epsilon-sarcoglycan cause myoclonus-dystonia syndrome显示文摘Zimprich A Grabowski M Asmus F 2001Nat Genet2001,29,1:1
11Pro value of nuclear Survivin expression in esophageal squamov cell carcinoma显示文摘Grabowski P 2003Br J Cancer2003,88,1:1
12Influence of an enriched environment and cortical grafting on functional out- come in brain infarcts of adult rats 显示文摘Grabowski M Sorensen JC Mattsson B 1995Exp Neurol1995,133,:1
13Comparative immunophenotypic study of lichen sclerosus: epidermotropic CD57+ lymphocytes are numerous-implications for pathogenesis显示文摘Carlson JA Grabowski R Chichester P 2000Am J Dermatopathol2000,22,:1
14Safety, effectiveness and ease of use of a nonreusable syringe in a developing country immmunization program显示文摘Steinglass RS Boyd D Grabowsky M 1995Bull WHO1995,73,:1
15Conformance testing with TTCN显示文摘Schieferdecker I Grabowski J 2000Telektronikk Languages for Telecommunication Applications2000,96,4:1
16Functional recovery after brain infarction:plasticity and neural transplantation显示文摘Johansson BB Grabowski M 1994Brain Pathol1994,4,1:1
17Prognostic value of nuclear survivin expression in esophageal squamous cell carcinoma显示文摘Grabowski P Kuhnel T Muhr-wilkenshoff F 2003Br J Cancer2003,88,1:1
18Preparation of phosphoenol-pyruvate from D-O-3-phosphoglyceric acid for use in regeneration of ATP显示文摘SIMON E S GRABOWSKI S WHITESIDES G M 1989Journal of the American Chemical Society1989,111,24:1
19Adenoid cystic breast carcinoma: is axillary staging necessary in all cases? Results from the California Cancer Registry 显示文摘Thompson K Grabowski J Saltzstein SL 2011Breast J2011,17,:1
20Evaluation of voxel-based morphometry for focal lesion detection in individuals 显示文摘Mehta S Grabowski TJ Trivedi Y 2003Neuroimage2003,20,3:1
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