Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Valentin A. Tsvetkov"'
Publikováno v:
Voprosy trudovogo prava (Labor law issues). :666-671
The article examines the problems arising from the lack of a unified conceptual apparatus at the supranational level of the EU on the example of the absence of properly fixed signs of the status of an employee, as well as signs that allow qualifying
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::03376994703280f4ac4c026e8d523152
https://doi.org/10.33920/pol-2-2109-03
https://doi.org/10.33920/pol-2-2109-03
Autor:
Valentin A. Tsvetkov, Jacob Y L Ho, Aleksei Dronov, Vladimir G. Chigrinov, Hoi-Sei Kwok, Sergei Pasechnik
Publikováno v:
World Journal of Nano Science and Engineering. :213-218
This paper describes a new type of polymeric waveguides which has the core, cladding medium and active nodes made from the same material. Part of the polymer is removed in cladding medium by formation of nanopores. The pores can be filled with liquid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cbded3179266541787fbce6f021c36ca
https://doi.org/10.4236/wjnse.2015.54022
https://doi.org/10.4236/wjnse.2015.54022
Publikováno v:
IEEE Photonics Technology Letters. 25:1672-1675
We report the fabrication and characterization of optical waveguides using porous polyethylene terephthalate (PET) film. An optical waveguide is produced by exposing the PET film to cyclotron followed by selective chemical etching. Considering that t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c50f7ab33141dbef872e66b98a73864
https://doi.org/10.1109/lpt.2013.2273090
https://doi.org/10.1109/lpt.2013.2273090
Autor:
Valentin V. Tsvetkov
Publikováno v:
Vestnik of Saint Petersburg University. Law. 7
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d0d55229792503841fc747463cca40a
https://doi.org/10.21638/11701/spbu14.2016.403
https://doi.org/10.21638/11701/spbu14.2016.403
Autor:
Vladimir G. Chigrinov, Dina V. Shmeliova, Valentin A. Tsvetkov, Sergey V. Pasechnik, A. V. Dubtsov
Publikováno v:
Liquid Crystals. 35:569-579
A new effect is described of the combined action of an electric field and light on the slow surface dynamics in a layer of nematic liquid crystal (NLC) contacted with a layer of dye pre‐treated by UV irradiation. Simultaneous application of a relat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fccf06f5a640be89149e82c19fa6603d
https://doi.org/10.1080/02678290802018352
https://doi.org/10.1080/02678290802018352
Autor:
Valentin A. Tsvetkov, Dmitry A. Yakovlev, S.V. Pasechnik, G.I. Maksimochkin, A. G. Maksimochkin, Vladimir G. Chigrinov
Publikováno v:
Optics Communications. 270:273-279
A simple experimental method and a set-up to control light beams in the plane of liquid crystal (LC) cell is developed. The main idea of the method is the reflection and the refraction of light beams propagating in a plane of LC layer from the bounda
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bc5c13ee984ceaa4a3ac8f299e17eafd
https://doi.org/10.1016/j.optcom.2006.09.014
https://doi.org/10.1016/j.optcom.2006.09.014
Autor:
Liu Zhijian, Sergey V. Pasechnik, Valentin A. Tsvetkov, Ildar Nasibullayev, Vladimir G. Chigrinov, Dina V. Shmeliova
Publikováno v:
Liquid Crystals. 33:1153-1165
We present an experimental study of thin liquid crystal (LC) layers under the action of a harmonically varied pressure gradient. Optical measurements were performed to register the linear oscillations of a nematic director related to homeotropic and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64c13c28560466fdb66a677e5408f53d
https://doi.org/10.1080/02678290600965457
https://doi.org/10.1080/02678290600965457
Autor:
Vladimir G. Chigrinov, Dina V. Shmeliova, Sergey V. Pasechnik, A. V. Dubtsov, Valentin A. Tsvetkov, Liu Zhijian, V. N. Kremenetsky
Publikováno v:
Liquid Crystals. 33:175-185
We present new results of experimental investigations of azimuthal director reorientation dynamics for a nematic liquid crystal on solid substrates. Two types of substrate with weak anchoring were studied: glass/polystyrene and glass/UV‐activated d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac15cc651511cb9ddbbd731e552ae42b
https://doi.org/10.1080/02678290500277862
https://doi.org/10.1080/02678290500277862
Autor:
A.N. Voronov, Sergey V. Pasechnik, Valentin A. Tsvetkov, Vladimir G. Chigrinov, Dina V. Shmeliova
Publikováno v:
Liquid Crystals. 31:585-592
We propose a new optical method and the experimental set-up for measuring the anisotropic shear viscosities of nematic liquid crystals (LCs). LC shear viscosities can be optimized to improve liquid crystal display (LCD) response times, e.g. in vertic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::759898dba0c17a46f2fc46f75c3fc8dc
https://doi.org/10.1080/02678290410001667371
https://doi.org/10.1080/02678290410001667371
Autor:
Sergey V. Pasechnik, Valentin A. Tsvetkov, Alexei Krekhov, I. Sh. Nasibullayev, Dina V. Shmeliova
Publikováno v:
Molecular Crystals and Liquid Crystals. 409:467-474
We report the results on the orientational dynamics and instabilities in nematic liquid crystal MBBA induced by decaying Poiseuille flow. The experiments were carried out in the rectangular wedge-shape LC cell with thickness varying perpendicular to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4b5724add19913bf52723e00811e7a1d
https://doi.org/10.1080/15421400490434018
https://doi.org/10.1080/15421400490434018