51 research outputs found
Практические аспекты организации медицинской помощи пациентам с впервые развившимся судорожным припадком
ПРИПАДКИ /ТЕРНЕВРОЛОГИЧЕСКИЕ СИМПТОМЫ ПРИ ПАТОЛОГИЧЕСКИХ СОСТОЯНИЯХЭПИЛЕПСИЯ, АБСАНС /ТЕРМОЗГА ГОЛОВНОГО БОЛЕЗНИ /ТЕРДИАГНОСТИКА ДИФФЕРЕНЦИАЛЬНАЯЛЕЧЕБНО-ДИАГНОСТИЧЕСКИХ МЕРОПРИЯТИЙ ГРАФИКМЕДИЦИНСКОЙ ПОМОЩИ ОРГАНИЗАЦИЯПРОГНОЗИРОВАНИЕУХОДА ЗА БОЛЬНЫМ МЕНЕДЖМЕН
The Buffer Gas Beam: An Intense, Cold, and Slow Source for Atoms and Molecules
Beams of atoms and molecules are stalwart tools for spectroscopy and studies
of collisional processes. The supersonic expansion technique can create cold
beams of many species of atoms and molecules. However, the resulting beam is
typically moving at a speed of 300-600 m/s in the lab frame, and for a large
class of species has insufficient flux (i.e. brightness) for important
applications. In contrast, buffer gas beams can be a superior method in many
cases, producing cold and relatively slow molecules in the lab frame with high
brightness and great versatility. There are basic differences between
supersonic and buffer gas cooled beams regarding particular technological
advantages and constraints. At present, it is clear that not all of the
possible variations on the buffer gas method have been studied. In this review,
we will present a survey of the current state of the art in buffer gas beams,
and explore some of the possible future directions that these new methods might
take
Understanding of a product/service system design: a holistic approach to support design for remanufacturing
Integrated injection seeded terahertz source and amplifier for time-domain spectroscopy.
We used a terahertz (THz) quantum cascade laser (QCL) as an integrated injection seeded source and amplifier for THz time-domain spectroscopy. A THz input pulse is generated inside a QCL by illuminating the laser facet with a near-IR pulse from a femtosecond laser and amplified using gain switching. The THz output from the QCL is found to saturate upon increasing the amplitude of the THz input power, which indicates that the QCL is operating in an injection seeded regime
The ATHENA X-ray Integral Field Unit (X-IFU)
The X-ray Integral Field Unit (X-IFU) is the high resolution X-ray spectrometer of the ESA Athena X-ray observatory. Over a field of view of 5' equivalent diameter, it will deliver X-ray spectra from 0.2 to 12 keV with a spectral resolution of 2.5 eV up to 7 keV on ∼ 5" pixels. The X-IFU is based on a large format array of super-conducting molybdenum-gold Transition Edge Sensors cooled at ∼ 90 mK, each coupled with an absorber made of gold and bismuth with a pitch of 249 μm. A cryogenic anti-coincidence detector located underneath the prime TES array enables the non X-ray background to be reduced. A bath temperature of ∼ 50 mK is obtained by a series of mechanical coolers combining 15K Pulse Tubes, 4K and 2K Joule-Thomson coolers which pre-cool a sub Kelvin cooler made of a 3He sorption cooler coupled with an Adiabatic Demagnetization Refrigerator. Frequency domain multiplexing enables to read out 40 pixels in one single channel. A photon interacting with an absorber leads to a current pulse, amplified by the readout electronics and whose shape is reconstructed on board to recover its energy with high accuracy. The defocusing capability offered by the Athena movable mirror assembly enables the X-IFU to observe the brightest X-ray sources of the sky (up to Crab-like intensities) by spreading the telescope point spread function over hundreds of pixels. Thus the X-IFU delivers low pile-up, high throughput (< 50%), and typically 10 eV spectral resolution at 1 Crab intensities, i.e. A factor of 10 or more better than Silicon based X-ray detectors. In this paper, the current X-IFU baseline is presented, together with an assessment of its anticipated performance in terms of spectral resolution, background, and count rate capability. The X-IFU baseline configuration will be subject to a preliminary requirement review that is scheduled at the end of 2018
Attenuation of chemokine receptor function and surface expression as an immunomodulatory strategy employed by human cytomegalovirus is linked to vGPCR US28
The Athena X-ray Integral Field Unit: a consolidated design for the system requirement review of the preliminary definition phase
Instrumentatio
Evaluation of “Design Loops” to Support the Design of Product Service Systems: A Case Study of a Helium Liquefier
Organised by: Cranfield UniversityIn this paper a specific evaluation for the PSS during the early design phase is presented, taking into
account:
the scenarios that supports the definition of the architecture of the whole system and the interactions
between the user and the system
the performance of the considered system assess with specific PSS criteria (economical and
environmental)
Our proposition consists in the evaluation of the design loops that are constructed jointly with the scenarios
describing activities and with the PSS architecture. This evaluation phase is part of a methodology that is
being developed to design global and optimized PSS.Mori Seiki – The Machine Tool Company; BAE Systems; S4T – Support Service Solutions: Strategy and Transitio
- …