Results 91 to 100 of about 204,238 (306)

Singularity of Feynman propagator and Cutkosky's cutting rules

open access: yes, 2005
We improve on Cutkosky's cutting rules which is used to calculate the contribution of the singularities of Feynman propagators to Feynman amplitude. The correctness of the improved cutting rules is verified by the calculations of the conventional loop momentum integral algorithm. We also find that only the process of the intermediate on shell particles
openaire   +2 more sources

Evaluation of the Potential of Laser Shock Peening Compared with Cold Expansion for Improving Fatigue Resistance of Riveted Lap Joints of Aerospace Grade 7175 Al Alloy

open access: yesAdvanced Engineering Materials, EarlyView.
This study investigates laser shock peening for enhancing fatigue performance of riveted aerospace aluminum joints. A comparative approach with cold expansion combines fatigue testing and synchrotron X‐ray methods. Integrating mechanical testing with residual stress and strain characterization provides insights into how different treatments affect the ...
Ogün Baris Tapar   +6 more
wiley   +1 more source

Pre-Emergence Herbicides and Mulches for Weed Control in Cutting Propagation

open access: yesAgronomy, 2020
Weed control is critical in cutting propagation to maximize root growth and liner quality, but hand weeding is time consuming and not cost efficient. Pre-emergence herbicides are widely used in container-grown nursery crop production, but concerns of ...
Anthony L. Witcher, Isha Poudel
doaj   +1 more source

Propagation of Fraser Fir by Stem Cuttings: Effects of Type of Cutting, Length of Cutting, and Genotype1

open access: yesHortScience, 1982
Abstract Stem cuttings of Fraser fir [Abies fraseri (Pursh) Poir.] were used in 3 studies to examine rooting and visible terminal bud activity as influenced by cutting length (10 to 26 cm), type of cutting (laterals vs. terminals) and genotype. Pronounced genotypic variation was observed for percentage of rooting as well as number and length of roots ...
N. F. Miller   +2 more
openaire   +1 more source

Major challenges in prognostics: study on benchmarking prognostic datasets [PDF]

open access: yes, 2012
Even though prognostics has been defined to be one of the most difficult tasks in Condition Based Maintenance (CBM), many studies have reported promising results in recent years.
Camci, Faith   +2 more
core  

Unstable particle's wave-function renormalization prescription [PDF]

open access: yes, 2005
We strictly define two set Wave-function Renormalization Constants (WRC) under the LSZ reduction formula for unstable particles at the first time.
Denner A.   +3 more
core   +2 more sources

Innovating Aircraft Repair Processes: The Role of Digitalization in Sustainability

open access: yesAdvanced Engineering Materials, EarlyView.
This research explores how digitalization—by storing detailed non‐destructive testing data in structured DICONDE databases and creating a standard data model of the component—innovates aviation maintenance and repair processes. Coupled with a developed state‐based simulation model, it enables data‐driven, sustainable repair strategies that reduce waste,
Johanna Aigner   +3 more
wiley   +1 more source

Argan tree (Argania spinosa L. skeels) vegetative propagation by cutting and grafting

open access: yesRevue Marocaine des Sciences Agronomiques et Vétérinaires, 2018
The argan tree (Argania spinosa L. skeels) is an endemic species of Morocco that plays an important socioeconomic role through the value of its oil. Despite the importance of the species, the main propagation method is still by seeds, which presents ...
M.L. Metougui   +4 more
doaj  

Vegetative propagation of Rhaphiodon echinus Schauer (Lamiaceae): effects of the period of cutting in rooting, cuttings arrangement and IBA concentrations for seedlings production

open access: yesOrnamental Horticulture, 2018
One of the tendencies in the floriculture sector, whether in modern landscaping or floral art, is related to the insertion of innovations in the sector, mainly of native origin.
Euvaldo de Sousa Costa Junior   +5 more
doaj   +1 more source

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