Results 31 to 40 of about 103,468 (216)

The paraboson Fock space and unitary irreducible representations of the Lie superalgebra osp(1|2n) [PDF]

open access: yes, 2007
It is known that the defining relations of the orthosymplectic Lie superalgebra osp(1|2n) are equivalent to the defining (triple) relations of n pairs of paraboson operators $b^\pm_i$. In particular, with the usual star conditions, this implies that the `
Lievens, S.   +2 more
core   +3 more sources

The evaluation of wear of tungsten carbide dental bur

open access: yesProduction Engineering Archives, 2018
Due to its durability, tungsten carbide has long been used as a material to produce dental burs. WC– Co burs are designed for smooth, efficient cutting and extended life.
Lisiecka Barbara
doaj   +1 more source

Quality control of a metallic dental bur with a diamond coating

open access: yesProduction Engineering Archives, 2018
During operation, sterilization and disinfection, the surface working part of dental burs deteriorates. In this study a commercial metallic dental bur with extra coarse gradation (177-250 μ of ceramic embankment), made of a stainless steel were covered ...
Strzelczak Katarzyna
doaj   +1 more source

Measuring Customer Retention in the European Automotive Sector

open access: yesCentral European Management Journal, 2021
Purpose: The main purpose of the work is to present the results of the customer retention level in the automotive sector based on the proposed measurement indicators: “serviced and sold” (SESO) and “sold and serviced” (SOSE).
Sliż Piotr, Delińska Liwia
doaj   +1 more source

Quark Mixings in $SU(6)\times SU(2)_R$ and Suppression of $V_{ub}$ [PDF]

open access: yes, 2000
The quark mixing matrix $V_{CKM}$ is studied in depth on the basis of superstring inspired $SU(6)\times SU(2)_R$ model with global flavor symmetries. The sizable mixings between right-handed down-type quark $D^c$ and colored Higgs field $g^c$ potentially
Froggatt   +8 more
core   +5 more sources

Influence of modifcation on the refinement of primary silicon crystals in hypereutectic silumin AlSi21CuNi

open access: yesProduction Engineering Archives, 2018
On the paper the influence of modifying micro additives on the refinement of primary silicon crystals in the hypereutectic AlSi21CuNi piston silumin have been examined.
Romankiewicz Remigiusz   +1 more
doaj   +1 more source

On groups with the same character degrees as almost simple groups with socle the Mathieu groups [PDF]

open access: yes, 2016
Let $G$ be a finite group and $cd(G)$ denote the set of complex irreducible character degrees of $G$. In this paper, we prove that if $G$ is a finite group and $H$ is an almost simple group whose socle is Mathieu group such that $cd(G) =cd(H)$, then ...
Alavi, Seyed Hassan   +2 more
core   +2 more sources

Classification of traffic signal system anomalies for environment tests of autonomous vehicles

open access: yesProduction Engineering Archives, 2018
In the future there will be a lot of changes and development concerning autonomous transport that will affect all participants of transport. There are still difficulties in organizing transport, but with the introduction of autonomous vehicles more ...
Lengyel Henrietta, Szalay Zsolt
doaj   +1 more source

Time-Series Ensemble Photometry and the Search for Variable Stars in the Open Cluster M11 [PDF]

open access: yes, 2005
This work presents the first large-scale photometric variability survey of the intermediate age (~200 Myr) open cluster M11. Thirteen nights of data over two observing seasons were analyzed (using crowded field and ensemble photometry techniques) to ...
Bopp B.   +9 more
core   +4 more sources

Supervision of measuring equipment based on risk management and ISO 9001

open access: yesProduction Engineering Archives, 2018
The study presents the results of analysis of the possibilities of measuring equipment supervision, taking into account the requirements of the ISO 9001: 2015 standard and risk management present there.
Pacana Andrzej
doaj   +1 more source

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