Zobrazeno 1 - 10
of 652
pro vyhledávání: '"E. Levchenko"'
Autor:
Egor K. Mikhailov, Andrey E. Levchenko, Vladimir V. Velmiskin, Tatiana S. Zaushitsyna, Mikhail M. Bubnov, Denis S. Lipatov, Andrey V. Shirmankin, Vladimir A. Kamynin, Mikhail E. Likhachev
Publikováno v:
Photonics, Vol 11, Iss 10, p 915 (2024)
In this study, we explored the potential for average power scaling in a monolithic side-counter-pumped combiner based on Yb-doped tapered fibers. The optimal configuration of the pump-feeding fibers was determined through experiments with passive sig
Externí odkaz:
https://doaj.org/article/73e6bc1272ed4e259d2cc7a324ac7a7f
Autor:
E. V. Levchenko, F. V. Moiseenko, S. V. Orlov, E. N. Imyanitov, A. E. Mikhnin, M. L. Gelfond, E. N. Slugin, S. M. Ergnyan, N. E. Levchenko, A. S. Zhabina, A. M. Ulitin, O. Yu. Mamontov, O. O. Lopushanskaya, E. V. Artemeva, A. I. Murtazin, V. I. Shabinskaya
Publikováno v:
Сибирский онкологический журнал, Vol 22, Iss 1, Pp 5-14 (2023)
Objective. To assess the overall and disease-free survival rates in patients with EGFR-mutated lung adenocarcinoma, who underwent surgery after achieving the objective response to tyrosine kinase inhibitor (TKI) therapy.Material and Methods. The over
Externí odkaz:
https://doaj.org/article/7336c9ed20724b46b7c9eb818dc1a744
Autor:
Egor K. Mikhailov, Konstantin K. Bobkov, Andrey E. Levchenko, Vladimir V. Velmiskin, Dmitry V. Khudyakov, Svetlana S. Aleshkina, Tatiana S. Zaushitsyna, Mikhail M. Bubnov, Denis S. Lipatov, Mikhail E. Likhachev
Publikováno v:
Photonics, Vol 10, Iss 12, p 1385 (2023)
We demonstrated an optimization of a picosecond fiber amplifier based on Yb-doped tapered fiber in a spectral range of 1030 nm. Nonlinear effects limiting peak power scaling (stimulated Raman scattering and four-wave mixing) were studied and factors
Externí odkaz:
https://doaj.org/article/70e32bebbb16445e8b8fe27db9535055
Autor:
I. E. Levchenko, O. A. Polyushkevich
Publikováno v:
Acta Biomedica Scientifica, Vol 7, Iss 3, Pp 64-74 (2022)
Background. The perception of mortality is consistent with pro-social practices that determine social development. Combining the tools of racial-anthropological and sociocultural approaches makes it possible to identify the universal characteristics
Externí odkaz:
https://doaj.org/article/9c0727509e5243b1aec7d880b040e2c5
Autor:
Alioune Niang, Daniele Modotto, Alessandro Tonello, Fabio Mangini, Umberto Minoni, Mario Zitelli, Marc Fabert, Mesay Addisu Jima, O. N. Egorova, Andrey E. Levchenko, Sergei L. Semjonov, Denis S. Lipatov, Sergey Babin, Vincent Couderc, Stefan Wabnitz
Publikováno v:
IEEE Photonics Journal, Vol 12, Iss 2, Pp 1-8 (2020)
We experimentally demonstrate spatial beam self-cleaning in an Yb-doped graded-index multimode fiber taper, both in passive and active configurations. The input laser beam at 1064 nm was injected for propagation from the small to the large core side
Externí odkaz:
https://doaj.org/article/942865bf011a4b92a37f790d5519b77d
Autor:
Maksim M. Khudyakov, Andrey E. Levchenko, Vladimir V. Velmiskin, Konstantin K. Bobkov, Svetlana S. Aleshkina, Tatyana S. Zaushitsyna, Mikhail M. Bubnov, Mikhail V. Yashkov, Aleksey N. Guryanov, Leonid V. Kotov, Mikhail E. Likhachev
Publikováno v:
Photonics, Vol 9, Iss 12, p 933 (2022)
The possibility to scale-up output pulse energy in diffraction-limited Er-doped fiber amplifier has been studied. It is shown that the utilization of tapered fiber design allows one to increase the pulse energy up to 2 mJ, while keeping the diffracti
Externí odkaz:
https://doaj.org/article/e176dacc1e7e4179bba7760e987873bf
Autor:
I. V. Kornienko, K. V. Stepanov, T. G. Faleeva, V. S. Rakuts, I. N. Ivanov, E. S. Mishin, N. V. Kononov, N. E. Levchenko, Y. S. Sidorenko
Publikováno v:
Теория и практика судебной экспертизы, Vol 14, Iss 2, Pp 107-114 (2019)
The question of whether it is appropriate to classify genetic examinations of kinship as a medical service is considered in the article. Establishment of identity of an unknown individual (alive or dead) with a specific person is a classic example of
Externí odkaz:
https://doaj.org/article/22c0e2d801994cce98e1a6281f4fc54c
Publikováno v:
Опухоли женской репродуктивной системы, Vol 14, Iss 2, Pp 82-89 (2018)
Despite the undeniable successes of modern medicine, the problems of oncology and, in particular, oncogynecology are still unresolved. Thus, a 5-year overall survival rate for stage I ovarian cancer is 89 %, for stage IV – 17 %. Given that complain
Externí odkaz:
https://doaj.org/article/c1f4a1cdfa7e4e638543a0cc2642e131
Autor:
R. I. Yurin, E. V. Levchenko, V. A. Gluscheko, A. E. Mikhnin, S. M. Ergnyan, L. V. Gorokhov, N. E. Levchenko, N. V. Khandogin
Publikováno v:
Вестник анестезиологии и реаниматологии, Vol 14, Iss 6, Pp 57-64 (2018)
The pain and pain syndrome remain to be serious problems of clinical medicine and surgery as one of its aspects. The positive correlation was found out between the type of surgery and post-operative pain in abdominal, thoracic and orthopedic surgerie
Externí odkaz:
https://doaj.org/article/af53c1e8a9b1435dbb0bb5677b854c7d
Autor:
Maksim M. Khudyakov, Andrei E. Levchenko, Vladimir V. Velmiskin, Konstantin K. Bobkov, Svetlana S. Aleshkina, Mikhail M. Bubnov, Mikhail V. Yashkov, Aleksei N. Gur’yanov, Leonid V. Kotov, Mikhail E. Likhachev
Publikováno v:
Photonics, Vol 8, Iss 12, p 523 (2021)
A tapered Er-doped fiber amplifier for high peak power pulses amplification has been developed and tested. The core diameter changed from 15.8 µm (mode field diameter (MFD) 14.5 µm) to 93 µm (MFD 40 µm) along 3.7 m maintaining single-mode perform
Externí odkaz:
https://doaj.org/article/26510f35a1a7487b9791c5e214fa12dc