1,929 research outputs found
A transportable strontium optical lattice clock
We report on a transportable optical clock, based on laser-cooled strontium
atoms trapped in an optical lattice. The experimental apparatus is composed of
a compact source of ultra-cold strontium atoms including a compact cooling
laser set-up and a transportable ultra-stable laser for interrogating the
optical clock transition. The whole setup (excluding electronics) fits within a
volume of less than 2 m. The high degree of operation reliability of both
systems allowed the spectroscopy of the clock transition to be performed with
10 Hz resolution. We estimate an uncertainty of the clock of .Comment: 12 pages, 9 figures, to be published in Appl. Phys.
A compact and efficient strontium oven for laser-cooling experiments
Here we describe a compact and efficient strontium oven well suited for
laser-cooling experiments. Novel design solutions allowed us to produce a
collimated strontium atomic beam with a flux of 1.0\times10^13 s^-1 cm^-2 at
the oven temperature of 450 {\deg}C, reached with an electrical power
consumption of 36 W. The oven is based on a stainless-steel reservoir, filled
with 6 g of metallic strontium, electrically heated in a vacuum environment by
a tantalum wire threaded through an alumina multi-bore tube. The oven can be
hosted in a standard DN40CF cube and has an estimated continuous operation
lifetime of 10 years. This oven can be used for other alkali and alkaline earth
metals with essentially no modifications.Comment: 6 pages, 6 figures, Review of Scientific Instruments, in pres
ΠΡΠΈΠ±ΠΎΡΡ Π΄Π»Ρ ΡΠΈΡΡΠ΅ΠΌΡ ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠ΅Π½ΠΈΡ Π±Π΅Π·ΠΎΠΏΠ°ΡΠ½ΠΎΡΡΠΈ Π²Π·ΡΡΠ²Π½ΡΡ ΡΠ°Π±ΠΎΡ ΠΏΡΠΈ Π΄ΠΎΠ±ΡΡΠ΅ ΠΏΠΎΠ»Π΅Π·Π½ΡΡ ΠΈΡΠΊΠΎΠΏΠ°Π΅ΠΌΡΡ
NEOShield kinetic impactor demonstration mission
This paper outlines a near-term mission concept developed under the NEOShield Project, for the demonstration of deflection capability of Potentially Hazardous Objects (PHOs). Potentially Hazardous Objects are a subclass of NEOs consisting mostly of asteroids (Potentially Hazardous Asteroids) that have the potential to make close approaches to the Earth whilst featuring a size large enough to cause significant regional damage in the event of an impact. It is currently (as of 2012) expected that only 20 - 30 percent of all existing PHOs are already known. This gives an indication that NEOs, in particular PHOs, are likely to pose a real threat to earth on a long time scale. Among the possible mitigation and deflection options, the mission outlined here seeks to demonstrate NEO deflection by means of a kinetic impactor. The main objectives of the mission are technology demonstration, deflection validation and beta-factor determination. This requires a mission that impacts a NEO in a representative velocity regime, allows measurement of the deflection sufficiently accurately to clearly demonstrate the momentum transfer by the impactor. The beta-factor quantifies the additional momentum transfer achieved through ejecta from the asteroid, which can be achieved both through accurate deflection measurement or ejecta observation, ideally through both. For the development of a fitting mission concept the NEOShield project performed a wide range of trade-offs while taking into consideration a variety of previously developed mission concepts such as Don Quijote
The Determinants Of Human Wellbeing In Professional Activities
The article discusses the issue of person's attitude towards success in his professional activities, which are the value of human labor and his wellbeing in professioanl activity. Personal attitude and substantial components of socio-psychological factors of attitude development provides the field of welfare of the employee. It focuses on the implementation of efficient technologies of formation attitude towards success in the process of training and retraining. The object of the research was the OJSC Evrazruda candidate pool members studying at the Evraz Siberia Regional Staff Training Center, as well as a group of experts (engineer, metallurgists). The techniques of V. K. Gerbachevsky, V. V. Stolin, S. R. Panteleyev, H. J. Eysenck, M. Rokeach, N. M. Peysakhov and J. Rotter were used in the research. The study showed the interconnection of a person's attitude with the dominant features of the component structure of motivational, volitional and self-consciousness factors. They are the determinants of wellbeing and quality of life in professional activity
Long range transport of ultra cold atoms in a far-detuned 1D optical lattice
We present a novel method to transport ultra cold atoms in a focused optical
lattice over macroscopic distances of many Rayleigh ranges. With this method
ultra cold atoms were transported over 5 cm in 250 ms without significant atom
loss or heating. By translating the interference pattern together with the beam
geometry the trap parameters are maintained over the full transport range.
Thus, the presented method is well suited for tightly focused optical lattices
that have sufficient trap depth only close to the focus. Tight focusing is
usually required for far-detuned optical traps or traps that require high laser
intensity for other reasons. The transport time is short and thus compatible
with the operation of an optical lattice clock in which atoms are probed in a
well designed environment spatially separated from the preparation and
detection region.Comment: 14 pages, 6 figure
Π‘ΠΎΠ²Π΅ΡΡΠ΅Π½ΡΡΠ²ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΌΠ°ΡΠΊΠ΅ΡΠΈΠ½Π³ΠΎΠ²ΠΎΠΉ Π΄Π΅ΡΡΠ΅Π»ΡΠ½ΠΎΡΡΠΈ Π½Π° ΠΏΡΠ΅Π΄ΠΏΡΠΈΡΡΠΈΠΈ
Π¦Π΅Π»ΡΡ Π΄Π°Π½Π½ΠΎΠΉ ΡΠ°Π±ΠΎΡΡ ΡΠ²Π»ΡΠ΅ΡΡΡ ΡΠΎΠ²Π΅ΡΡΠ΅Π½ΡΡΠ²ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΌΠ°ΡΠΊΠ΅ΡΠΈΠ½Π³ΠΎΠ²ΠΎΠΉ Π΄Π΅ΡΡΠ΅Π»ΡΠ½ΠΎΡΡΠΈ Π½Π° ΠΏΡΠ΅Π΄ΠΏΡΠΈΡΡΠΈΠΈ ΠΠΠ Β«ΠΠ΅Π΄ΠΈΠ° ΡΠ΅ΡΡΡΡΒ».
Π‘ΡΡΡΠΊΡΡΡΠ° Π±Π°ΠΊΠ°Π»Π°Π²ΡΡΠΊΠΎΠΉ ΡΠ°Π±ΠΎΡΡ ΡΠΎΡΡΠΎΠΈΡ ΠΈΠ· Π²Π²Π΅Π΄Π΅Π½ΠΈΡ, ΡΠ΅ΡΡΡΡΡ
Π³Π»Π°Π², Π·Π°ΠΊΠ»ΡΡΠ΅Π½ΠΈΡ, ΡΠΏΠΈΡΠΊΠ° ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½Π½ΠΎΠΉ Π»ΠΈΡΠ΅ΡΠ°ΡΡΡΡ ΠΈ ΠΏΡΠΈΠ»ΠΎΠΆΠ΅Π½ΠΈΠΉ.
ΠΠΊΡΡΠ°Π»ΡΠ½ΠΎΡΡΡ ΡΠ΅ΠΌΡ ΡΠΎΡΡΠΎΠΈΡ Π² ΡΠΎΠΌ, ΡΡΠΎ ΠΌΠ°ΡΠΊΠ΅ΡΠΈΠ½Π³ ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠΈΠ²Π°Π΅Ρ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ½ΡΠΉ ΠΏΠΎΠ΄Ρ
ΠΎΠ΄ ΠΊ ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡ ΠΏΡΠ΅Π΄ΠΏΡΠΈΡΡΠΈΠ΅ΠΌ, ΠΊΠΎΡΠΎΡΡΠ΅ ΠΏΠΎΠ·Π²ΠΎΠ»ΡΡ ΠΊΠΎΠ½ΠΊΡΡΠΈΡΠΎΠ²Π°ΡΡ ΠΈ ΡΠ΅Π°Π»ΠΈΠ·ΠΎΠ²ΡΠ²Π°ΡΡ ΡΠ²ΠΎΠΉ ΠΏΠΎΡΠ΅Π½ΡΠΈΠ°Π» Π² ΡΡΠ»ΠΎΠ²ΠΈΡΡ
ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΠΎΠ³ΠΎ ΡΡΠ½ΠΊΠ°, ΠΊΠΎΡΠΎΡΡΠΉ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΠ·ΡΠ΅ΡΡΡ Π²ΡΡΠΎΠΊΠΎΠΉ ΡΡΠ΅ΠΏΠ΅Π½ΡΡ Π΄ΠΈΠ½Π°ΠΌΠΈΠ·ΠΌΠ°, ΠΈΠ·ΠΌΠ΅Π½ΡΠΈΠ²ΠΎΡΡΠΈ ΡΡΠ»ΠΎΠ²ΠΈΠΉ.
ΠΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½Π½ΡΠ΅ ΠΌΠ΅ΡΠΎΠΏΡΠΈΡΡΠΈΡ ΠΌΠΎΠ³ΡΡ ΡΡΠΏΠ΅ΡΠ½ΠΎ ΠΏΡΠΈΠΌΠ΅Π½ΡΠ΅ΡΡΡ Π² Π΄Π΅ΡΡΠ΅Π»ΡΠ½ΠΎΡΡΠΈ ΠΠΠ Β«ΠΠ΅Π΄ΠΈΠ° ΡΠ΅ΡΡΡΡΒ» Π° ΡΠ°ΠΊΠΆΠ΅ Π² Π»ΡΠ±ΠΎΠΉ Π΄ΡΡΠ³ΠΎΠΉ ΠΊΠΎΠΌΠΏΠ°Π½ΠΈΠΈ, ΠΏΡΠ΅Π΄ΠΎΡΡΠ°Π²Π»ΡΡΡΠΈΠ΅ ΡΠ΅ΠΊΠ»Π°ΠΌΠ½ΡΠ΅ ΡΡΠ»ΡΠ³ΠΈ.
Π Π°Π±ΠΎΡΠ° Π²ΡΠΏΠΎΠ»Π½Π΅Π½Π° Π½Π° 86 ΡΡΡΠ°Π½ΠΈΡΠ°Ρ
, ΡΠΎΠ΄Π΅ΡΠΆΠΈΡ 22 ΡΠ°Π±Π»ΠΈΡΡ, 13 ΡΠΈΡΡΠ½ΠΊΠΎΠ² ΠΈ 2 ΠΏΡΠΈΠ»ΠΎΠΆΠ΅Π½ΠΈΡ.The aim of this work is to develop marketing activities to improve company Β«Media ResourcesΒ».
The structure of the thesis consists of the objectives, namely the introduction, four chapters, conclusions, bibliography and appendices.
Background is that marketing provides a comprehensive approach to business management that will compete and realize their potential in today's market, which is characterized by a high degree of dynamism, the variability of conditions.
The proposed activities can be successfully applied in the activity of Β«Media ResourcesΒ» as well as any other companies providing advertising services.
The work on 86 pages21 contain tables 13 graphics and 2 applications
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