Results 41 to 50 of about 1,020,130 (282)

Measuring wheel/rail contact stresses using ultrasound [PDF]

open access: yes, 2004
The investigation of contact area and pressure distribution in a wheel/rail contact is essential information required in fatigue and wear calculations to determine design life, regrinding requirements, and maintenance schedules.
Bjorklund, S.   +4 more
core  

Monolithic arrays of surface emitting laser NOR logic devices [PDF]

open access: yes, 1993
Monolithic, cascadable, laser-logic-device arrays have been realized and characterized. The monolithic surface-emitting laser logic (SELL) device consists of an AlGaAs superlattice lasing around 780 nm connected to a heterojunction phototransistor (HPT ...
Lee, Y. H.   +5 more
core   +1 more source

Time-Resolved Ultrafast Transient Polarization Spectroscopy to Investigate Nonlinear Processes and Dynamics in Electronically Excited Molecules on the Femtosecond Time Scale [PDF]

open access: yes, 2020
We report a novel experimental technique to investigate ultrafast dynamics in photoexcited molecules by probing the third-order nonlinear optical susceptibility.
Belkacem, Ali   +5 more
core   +3 more sources

New Onset of Fibromyalgia After Exposure to a Combat Environment: A Longitudinal Cohort Study

open access: yesArthritis Care &Research, EarlyView.
Objective Traumatic life events are hypothesized to be triggers for the onset of fibromyalgia. Posttraumatic stress disorder (PTSD) is a common comorbidity of fibromyalgia. However, limited prospective data are available on the development of fibromyalgia after exposure to high‐magnitude stress.
Jay B. Higgs   +15 more
wiley   +1 more source

Enhancing Optoelectronic Properties in Phthalocyanine‐Based SURMOFs: Synthesis of ABAB Linkers by Avoiding Statistical Condensation with Tailored Building Blocks

open access: yesAdvanced Functional Materials, EarlyView.
A novel phthalocyanine (PC)‐based metal–organic framework (MOFs) is synthesized using ditopic PC linkers obtained through regioselective statistical condensation. The resulting MOF exhibits significant improvements in electronic absorption, thereby enhancing the material's performance in light harvesting and energy conversion.
Lukas S. Langer   +12 more
wiley   +1 more source

European Union Enlargement: Prospects and Potential Pitfalls Along the Way [PDF]

open access: yes, 1999
[From the Introduction]. Enlarging the European Union (EU) is a multi-faceted process, marked by the milestones of the application for membership by a state, issuance of the opinion of the European Commission on that application, a decision by the ...
Soveroski, Marie
core  

Intermolecular Interactions as Driving Force of Increasing Multiphoton Absorption in a Perylene Diimide‐Based Coordination Polymer

open access: yesAdvanced Functional Materials, EarlyView.
This study uncovers the unexplored role of intermolecular interactions in multiphoton absorption in coordination polymers. By analyzing [Zn2tpda(DMA)2(DMF)0.3], it shows how the electronic coupling of the chromophores and confinement in the MOF enhance two‐and three‐photon absorption.
Simon Nicolas Deger   +11 more
wiley   +1 more source

An experimental study to test a 3D laser Scanner for body measurement and 3D virtual garment design in Fashion education [PDF]

open access: yes, 2005
Artists, scientists, anthropometrists and tailors have accurately measured the human body with traditional tools, such as tape measures, callipers and accumulated visceral experience for centuries. Due to the progressive acceleration in the quality of 3D
Taylor, Andrew, Unver, Ertu
core  

Tuning the Dielectric Properties of Individual Clay Nanosheets by Interlayer Composition: Toward Nano‐Electret Materials

open access: yesAdvanced Functional Materials, EarlyView.
The dielectric properties of clays are studied on the level of individual monolayers and functional double stacks. The material breakdown characteristics and charge storage performance are analyzed. For illustration, a defined charge pattern representing a cuneiform character is produced, written into a microscopic clay tile, referencing the origins of
Sebastian Gödrich   +6 more
wiley   +1 more source

Safe Practice of Y-Site Drug Administration: The Case of Colistin and Parenteral Nutrition

open access: yesPharmaceutics, 2020
A serious problem in everyday clinical practice is the co-administration of drugs using the same infusion line. Potential complications of co-administration of incompatible drugs include precipitation in the infusion line or central venous catheter ...
Maciej Stawny   +3 more
doaj   +1 more source

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