Results 31 to 40 of about 1,159,991 (294)

Monitoring of Shallow-Grooved Tramway Crossings

open access: yesCommunications, 2023
The article presents selected results and the sequencing of research into the project "Long-Term Monitoring of Rail Structures in Tramway Crossings with a Focus on Shallow-Grooved Crossings Aimed at the Optimization of their Maintenance and Noise ...
Magdalena Křečková   +1 more
doaj   +1 more source

Integrability and level crossing manifolds in a quantum Hamiltonian system [PDF]

open access: yes, 1998
We consider a two-spin model, represented classically by a nonlinear autonomous Hamiltonian system with two degrees of freedom and a nontrivial integrability condition, and quantum mechanically by a real symmetric Hamiltonian matrix with blocks of ...
E. Magyari   +12 more
core   +3 more sources

Method for pre-processing of level crossing image [PDF]

open access: yesTransport Problems, 2015
Actuality of problem in the improvement of transport safety at level crossings (LC) is caused by increasing the number of vehicles and reducing discipline of vehicle drivers.
Roman RYBALKA, Konstantin HONCHAROV
doaj  

Level Crossing Analysis of the Stock Markets

open access: yes, 2006
We investigate the average frequency of positive slope $\nu_{\alpha}^{+}$, crossing for the returns of market prices. The method is based on stochastic processes which no scaling feature is explicitly required.
Bahraminasab A Movahed M S Nassiri S D Masoudi A A   +21 more
core   +1 more source

NaI revisited: Theoretical investigation of predissociation via ultrafast XUV transient absorption spectroscopy. [PDF]

open access: yes, 2019
Avoided crossings can trigger abrupt changes of electronic character and redirect the outcomes of photochemical reactions. Here, we report a theoretical investigation into core-level spectroscopic probing of predissociation dynamics of sodium iodide (NaI)
Kobayashi, Yuki   +3 more
core   +1 more source

Semigroup Structures and Commutative Ideals of BCK-Algebras Based on Crossing Cubic Set Structures

open access: yesAxioms, 2022
First, semigroup structure is constructed by providing binary operations for the crossing cubic set structure. The concept of commutative crossing cubic ideal is introduced by applying crossing cubic set structure to commutative ideal in BCK-algebra, and
Mehmet Ali Öztürk   +2 more
doaj   +1 more source

Carcinomas and Carcinoid Tumors of the Lungs and Bronchi in Children and Adolescents: The EXPeRT Recommendations

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Primary lung carcinomas and bronchial carcinoid tumors (BC) are very rare malignancies in childhood. While typical BC and mucoepidermoid carcinomas are mostly low‐grade, localized tumors with a more favorable prognosis than in adults, necessitating avoidance of overtreatment, adenocarcinomas of the lung are often diagnosed at advanced disease ...
Michael Abele   +19 more
wiley   +1 more source

Safe implementation of automatic microprocessor systems of level crossing on the example of the SPA-4 system [PDF]

open access: yesTransport Problems, 2007
Fulfilling high requirements of safety and reliability is an importantquestion in devices of railway traffic control. Increased safety in computer systems is reached in the simplest way through redundancy of hardware and software, but also with other ...
Mieczysław KORNASZEWSKI   +1 more
doaj  

Level-crossing and modal structure in microdroplet resonators

open access: yes, 2016
We fabricate a liquid-core liquid-clad microcavity that is coupled to a standard tapered fiber, and then experimentally map the whispering-gallery modes of this droplet resonator.
Attar, Sarah T.   +4 more
core   +1 more source

Level-crossing rate and average duration of fades of the envelope of mobile-to-mobile fading channels in K-parallel dual-hop relay networks [PDF]

open access: yes, 2009
This paper studies the fading behavior of narrowband mobile-to-mobile (M2M) fading channels in dual-hop distributed cooperative multi-relay systems under non-line-of-sight (NLOS) propagation conditions.
Pätzold, Matthias, Talha, Batool
core   +2 more sources

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