Patrick A. Klein

Düsseldorf University Hospital

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Huajian Gao

Nanyang Technological University

James W. Foulk

Sandia National Laboratories California

Jonathan A. Zimmerman

Technion – Israel Institute of Technology

Harold S. Park

Boston University

George C. Johnson

University of California, Berkeley

Petra C. Gierthmuehlen

Heinrich Heine University Düsseldorf

Robert O. Ritchie

University of California, Berkeley

Stephen M. Foiles

Sandia National Laboratories

Heidi Williams

National Bureau of Economic Research

Lothar Gaul

University of Stuttgart

Cooperative Institutions

Sandia National Laboratories California

Sandia National Laboratories

Office of Scientific and Technical Information

University of California, Berkeley

National Technical Information Service

Heinrich Heine University Düsseldorf

University of Illinois Urbana-Champaign

Stanford University

Düsseldorf University Hospital

Massachusetts Institute of Technology

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

The elastic modulus of single-wall carbon nanotubes: a continuum analysis incorporating interatomic potentials

International Journal of Solids and Structures (2002)

P. Zhang Yue Huang Philippe H. Geubelle Patrick A. Klein Ao Wang

Continuum hypothesis

10.1016/s0020-7683(02)00186-5

Cite

Citations (402)

A three-dimensional validation of crack curvature in muscovite mica

Judith Hill James W. Foulk Patrick A. Klein E. P. Chen

Experimental and computational efforts focused on characterizing crack tip curvature in muscovite mica. Wedge-driven cracks were propagated under monochromatic light. Micrographs verified the subtle curvature of the crack front near the free surface. A cohesive approach was employed to model mixed-mode fracture in a three-dimensional framework. Finite element calculations captured the crack curvature observed in experiment.

Muscovite

Wedge (geometry)

Source

Cite

Citations (4)

Coupling and communicating between atomistic and continuum simulation methodologies

Springer eBooks (2007)

Jonathan A. Zimmerman Patrick A. Klein Edmund B. Webb

10.1007/978-1-4020-5062-6_18

Cite

Citations (1)

Survival and Complications of Partial Coverage Restorations on Posterior Teeth—A Systematic Review and Meta‐Analysis

Journal of Esthetic and Restorative Dentistry (2024)

L. S. Prott Stefano Pieralli Patrick A. Klein Frank A. Spitznagel Fady Ibrahim

ABSTRACT Objective To determine the clinical performance of partial coverage restorations (PCR) (onlays, occlusal veneers, and partial crowns) composed of different ceramic and ceramic‐based materials to treat extended posterior defects. Materials and Methods MEDLINE, Scopus, CENTRAL, ClinicalTrials.gov, and the International Clinical Trials Registry Platform were searched (inception‐February 2024) for randomized controlled trials (RCT) comparing posterior PCRs composed of different ceramic and ceramic‐based materials with a minimum follow‐up of 1 year. Results Six RCTs were included. Resin matrix ceramic (RMC) and lithium disilicate (LDS) restorations had a 3‐year survival rate of 89.3% (95% CI 76.4–95.3) and 93.7% (95% CI 83.7–97.7), respectively, and leucite‐reinforced glass ceramic (LRGC) restorations a range between 96.1% (95% CI 90.1–98.9) compared with RMC and 98.3% (95% CI 90.8–100) compared with LDS. After 1–3 years of follow‐up, LDS slightly outperformed RMC on restoration failure and loss of retention (1.56 more failures and 1.78 more loss of retentions for RMC per 100 restoration‐years [low certainty evidence]). No statistically significant differences between ceramic and ceramic‐based materials were detected in short‐term follow‐up (1–3 years of follow‐up). The long‐term performance of posterior PCRs is uncertain. Conclusion The survival of LDS restorations may slightly outperform RMC restorations after 3 years of follow‐up across outcomes, except for bulk fracture. RCTs providing medium to long‐term data are needed. Clinical Significance Ceramic and ceramic‐based PCRs are a reliable treatment option to restore extended posterior defects.

Posterior teeth

Dental porcelain

10.1111/jerd.13353

Cite

Citations (1)

Amelogenesis imperfecta: Analysis of the genetic basis and treatment with a digital workflow: A clinical report

Journal of Prosthetic Dentistry (2024)

Patrick A. Klein Johanna S. Hoppe Nuria C Bramswig Petra C. Gierthmuehlen

Amelogenesis imperfecta

Basis (linear algebra)

10.1016/j.prosdent.2024.09.032

Cite

Citations (0)

A variational multiscale method to incorporate strain gradients in a phenomenological plasticity model

Computer Methods in Applied Mechanics and Engineering (2004)

Steven Louis Creighton Richard A. Regueiro Krishna Garikipati Patrick A. Klein E. Marı́n

Infinitesimal strain theory

Finite strain theory

Phenomenological model

Viscoplasticity

Computational model

Strain (injury)

10.1016/j.cma.2004.02.021

Cite

Citations (13)

Atomic-level Simulation of Dislocation Nucleation During Nanoindentation

APS (2001)

Stephen M. Foiles Jonathan A. Zimmerman Patrick A. Klein

Source

Cite

Citations (0)

Surface Step Effects on Nanoindentation

Physical Review Letters (2001)

Jonathan A. Zimmerman Cynthia L. Kelchner Patrick A. Klein J. C. Hamilton Stephen M. Foiles

Atomistic simulation is used to examine nanoindentation of a Au(111) crystal both near and far from a surface step. While the load needed to nucleate dislocations decreases significantly when indenting close to the step, the extent of the step's influence is not as great as seen experimentally. This behavior is explained by measuring the contact area from the simulation data. A new metric, the slip vector, shows material slip coinciding with the $〈112〉$ directions of a lowest unstable stacking fault barrier. The slip vector is used to calculate an atomic critical resolved shear stress, which is shown to be a good dislocation nucleation criterion.

Burgers vector

10.1103/physrevlett.87.165507

Cite

Citations (468)

Replication Data for: 'Who Profits from Patents? Rent-Sharing at Innovative Firms' KPWZ_replication.zip

Harvard Dataverse (2019)

Patrick A. Klein Neviana Petkova Heidi Williams Owen Zidar

:unav

Replication

10.7910/dvn/hmfyon/qnyapp

Cite

Citations (0)

Organic fertilisers and nitrogen availability

Acta Horticulturae (2017)

C. Blok Marta Streminska T. Vermeulen Patrick A. Klein

Liquid organic fertilisers allow growers to abandon the use of conventional de novo (mined or synthesised) fertilisers without the need for major technological adaptions in the greenhouse. It was decided to run a cultivation experiment to find practical information for producers and growers when using liquid organic fertilisers in cultivation. The objective was to compare crop production between plants grown with liquid organic fertilisers and plants grown with conventional de novo fertilisers. Cucumbers were propagated in coir and peat and planted on slabs of respectively coir and peat. The plants on the two rooting media received either liquid organic or chemical fertilisers, resulting in four treatments in total. Plants fed with liquid chemical fertilisers were shown to initially produce 10-20% more fresh weight per unit time than plants fed with liquid organic fertilisers. When organic fertiliser was used during cultivation, ammonium accumulated to levels of 10-20 mmol L-1, while nitrate levels dropped to below 1 mmol L-1. To explain the results, the conversion of nitrogen was studied. Conversion of organic nitrogen into nitrate requires enzymatic hydrolysis to ammonium, followed by bacterial oxidation to nitrate. This microbiological process depends on two physiological groups of naturally occurring aerobic soil bacteria; ammonia oxidising bacteria (AOB) and nitrite oxidizing bacteria (NOB). In conclusion nitrate concentration rather than the concentrations of organic nitrogen or ammonium, were growth rate determining. The low conversion rate of ammonium into nitrate by bacteria present in substrate limited the leaf area growth of cucumbers. Suggestions to overcome the problem are made.

10.17660/actahortic.2017.1168.1

Cite

Citations (6)