8,324 research outputs found
Effect of Blood Ph and CO2 Tension on the Performance of the Heart-lung Preparation
Blood pH and carbon dioxide tension effect on performance of heart-lung preparatio
Effect of hypoxia on myocardium in heart-lung preparation
Effect of hypoxia on myocardium in starling heart lung preparations ventilated with mixtures of oxygen, nitrogen, and carbon dioxid
Polaritonic characteristics of insulator and superfluid phases in a coupled-cavity array
Recent studies of quantum phase transitions in coupled atom-cavity arrays
have focused on the similarities between such systems and the Bose-Hubbard
model. However, the bipartite nature of the atom-cavity systems that make up
the array introduces some differences. In order to examine the unique features
of the coupled-cavity system, the behavior of a simple two-site model is
studied over a wide range of parameters. Four regions are identified, in which
the ground state of the system may be classified as either a polaritonic
insulator, a photonic superfluid, an atomic insulator, or a polaritonic
superfluid.Comment: 7 pages, 9 figures, 1 table, REVTeX 4; published versio
Mixing-induced fluid destratification and ullage condensation
In many applications, on-orbit storage and transfer of cryogens will require forced mixing to control tank pressure without direct venting to space. During a no-vent transfer or during operation of a thermodynamic vent system in a cryogen storage tank, pressure control is achieved by circulating cool liquid to the liquid-vapor interface to condense some of the ullage vapor. To measure the pressure and temperature response rates in mixing-induced condensation, an experiment has been developed using Freon 11 to simulate the two-phase behavior of a cryogen. A thin layer at the liquid surface is heated to raise the tank pressure, and then a jet mixer is turned on to circulate the liquid, cool the surface, and reduce the pressure. Many nozzle configurations and flow rates are used. Tank pressure and the temperature profiles in the ullage and the liquid are measured. Initial data from this ground test are shown correlated with normal-gravity and drop-tower dye-mixing data. Pressure collapse times are comparable to the dye-mixing times, whereas the times needed for complete thermal mixing are much longer than the dye-mixing times
Cardiac output and regional blood flow in conscious rats exposed to acute hypoxia
Cardiac output and regional blood flow in conscious rats exposed to acute hypoxi
Dynamics in a coupled-cavity array
The dynamics of a system composed of two coupled optical cavities, each
containing a single two-level atom, is studied over a wide range of detuning
and coupling values. A description of the field in terms of delocalized modes
reveals that the detuning between the atoms and these modes is controlled by
the coupling between the cavities; this detuning in turn governs the nature of
the dynamics. If the atoms are highly detuned from both delocalized field
modes, the dynamics becomes dispersive and an excitation may be transferred
from the first atom to the second without populating the field. In the case of
resonance between the atoms and one of the delocalized modes, state transfer
between the atoms requires intermediate excitation of the field. Thus the
interaction between the two atoms can be controlled by adjusting the coupling
between the cavities.Comment: 11 pages, 3 figure
Cross-Kerr-based information transfer processes
The realization of nonclassical states is an important task for many
applications of quantum information processing. Usually, properly tailored
interactions, different from goal to goal, are considered in order to
accomplish specific tasks within the general framework of quantum state
engineering. In this paper we remark on the flexibility of a cross-Kerr
nonlinear coupling in hybrid systems as an important ingredient in the
engineering of nonclassical states. The general scenario we consider is the
implementation of high cross-Kerr nonlinearity in cavity-quantum
electrodynamics. In this context, we discuss the possibility of performing
entanglement transfer and swapping between a qubit and a continuous-variable
state. The recently introduced concept of entanglement reciprocation is also
considered and shown to be possible with our scheme. We reinterpret some of our
results in terms of applications of a generalized Ising interaction to systems
of different nature.Comment: 8 pages, 4 figures, RevTeX
An examination of the use of the verb ‘Haya’ (ה'ה) ‘be’ in biblical Hebrew
The accompanying thesis details the way in which the Hebrew verb ‘Haya’ (h), ‘b’ functions. The study begins by summarising briefly the threefold aspect of the verb 'be', (i) as Copula, (ii) as expressing 'Existence', and (iii) to denote Transition or 'Becoming'. It is shown how each aspect has its basic syntax as regards subject definition and the nature of the predicate, such that a defined nominal subject, an adjectival or nominal predicate is normally associated with a Copula usage, whilst undefined nominal subjects and adverbial predicates usually denote Existence. The transitional aspect is expressed by the verb and the preposition '1', 'to'. From this point the use of ‘Haya’ (h) in its two themes, and Niphal, are thoroughly investigated. It becomes increasingly evident that its more particular function is to locate a situation or event more specifically in time rather than point to the nature of that action as complete or incomplete. The Perfect, Perfect with weak waw, Imperfect Consecutive and Preterite Imperfect 'tenses' indicate past time, and Imperfect, Imperfect with weak waw, and Perfect Consecutive 'tenses' speak of the future. This temporal indication is also the specific function of the verb 'haya (h)' when used "non-integrally" at the commencement of clauses. An explanation is offered for the non-appearance of the verb 'haya’ (h) ' in any other theme, and in particular how the 'causative' connotation is conveyed. Before moving to a consideration of the two particles 'yes' 'there is', and ‘ayin', 'there is not' and their role as supplementing the verb ‘Haya’ (h) by denoting "pfesent existence, the increasing use of that verb in compound with participles is traced. The conclusions are listed more formally and in the Appendices every occurrence of the verb is given for ease of reference
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