Optical assessment of bone bioimplants

Тимченко, П. Е.; Timchenko, E. V.; Волова, Л. Т.; Dolgushkin, D. A.; Boltovskaya, V. V.; Frolov, O. O.; Fedorova, Ya. V.

doi:10.1117/12.2272343

Cited by 2 publications

(3 citation statements)

References 10 publications

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“…On other hand, results for vessels without ice strengthening obtained on basis of MIZ type maps published by the NIC show the least variability regardless of statistical method used, if such method does not combine information from maps of different producers ( Table 2, Figures 2 and 3). Length of time window for ice concentration not higher than 18% (the length of navigation season for ice-free navigation conditions) for the PLANETA maps and median results of all methods and sources of information is highly convergent with results of Frolov et al [4] and earlier work of the Author [19] related to very light ice conditions.…”

Section: Fig 4 Median Ice Concentration In the Studied Region For Asupporting

confidence: 79%

“…In connection with expected climate changes, the need to increase number of icebreakers in relation to the currently operated and with more drive power than icebreakers currently in use has been noticed [4]. The government of the Russian Federation has secured in state budget expenditure on new-generation nuclear and diesel-powered icebreakers to secure sea transport on the NSR [7].…”

Section: Introductionmentioning

confidence: 99%

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Scheduling Transit Voyages of Vessels of Various Ice Classes Across the Northern Sea Route

Pastusiak¹

2019

Annual of Navigation

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Main problem for scheduling vessel transit voyages through the Northern Sea Route is the difficulty in predicting distribution of ice boundaries in regions that cannot be overcome by individual ice classes of vessels. Scheduling of voyage is related to speed that vessels can develop and moment of time when vessels will be able to commence and complete passage safely through areas that are main obstacle and are blocking longest transit passage through the Northern Sea Route. This applies to voyages carried out by vessels navigating on their own and with support of icebreakers. Additional problem is lack of consistency of content of maps of ice cover, which can be used for vessels voyage planning through areas where ice cover occurs. Results of this research on influence of uncertain information related with time window of conditions favorable for navigation of vessels of different ice classes on schedule of theirs voyage on example of summer navigation season 2017 are presented in this work.

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Section: Fig 4 Median Ice Concentration In the Studied Region For Asupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Scheduling Transit Voyages of Vessels of Various Ice Classes Across the Northern Sea Route

Pastusiak¹

2019

Annual of Navigation

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“…Some of them were already explored in [64]. Moreover, as it was recently showed by V. P. Frolov and A. V. Frolov [65], the Weyl-type solutions admit a construction of the so-called hybrid black holes obtained by gluing the external Kerr space-time to the internal static Weyl metric, which represents distorted axisymmetric, static, vacuum black hole. The multipole moments of the distortion field are defined by the Kerr black hole's mass and angular momentum.…”

Section: Discussionmentioning

confidence: 99%

Distorted stationary rotating black holes

Shoom

2015

Phys. Rev. D

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We study the interior of distorted stationary rotating black holes on the example of a Kerr black hole distorted by external static and axisymmetric mass distribution. We show that there is a duality transformation between the outer and inner horizons of the black hole, which is different from that of an electrically charged static distorted black hole. The duality transformation is directly related to the discrete symmetry of the space-time. The black hole horizons area, surface gravity, and angular momentum satisfy the Smarr formula constructed for both the horizons. We formulate the zeroth, the first, and the second laws of black hole thermodynamics for both the horizons of the black hole and show the correspondence between the local and the global forms of the first law. The Smarr formula and the laws of thermodynamics formulated for both the horizons are related by the duality transformation. The distortion is illustrated on the example of a quadrupole and octupole fields. The distortion fields noticeably affect the proper time of a free fall from the outer to the inner horizon of the black hole along the symmetry semi-axes. There is some minimal non-zero value of the quadrupole and octupole moments when the time becomes minimal. The minimal proper time indicates the closest approach of the horizons due to the distortion.

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Optical assessment of bone bioimplants

Cited by 2 publications

References 10 publications

Scheduling Transit Voyages of Vessels of Various Ice Classes Across the Northern Sea Route

Scheduling Transit Voyages of Vessels of Various Ice Classes Across the Northern Sea Route

Distorted stationary rotating black holes

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