762 research outputs found
INVESTIGATION OF THE HOMOGENIZATION EFFICIENCY OF THE SCREW AGITATOR, HELICAL RIBBON AGITATOR, GATE TYPE ANCHOR IMPELLER AND THE MULTI-PADDLE AGITATOR IN THE MIXING OF HIGH-VISCOSITY NEWTONIAN LIQUIDS
Presented by Prof. Dr. P. FOLDE
Vacuum Photon Splitting in Lorentz-Violating Quantum Electrodynamics
Radiative corrections arising from Lorentz violation in the fermion sector
induce a nonzero amplitude for vacuum photon splitting. At one loop, the
on-shell amplitude acquires both CPT-even and CPT-odd contributions forbidden
in conventional electrodynamics.Comment: 4 pages, minor wording changes, references added, accepted in
Physical Review Letter
Strategic Foresight in EU R&I Policy : Wider Use - More Impact : Report of the Expert Group 'Strategic Foresight for R&I Policy in Horizon 2020'
Correlation of bio- and magnetostratigraphy of Badenian sequences from western and northern Hungary
Lithological, magnetostratigraphic and paleontological (nannoplankton, foraminifers, molluscs) studies were carried out on the Badenian successions of boreholes Sopron-89, Nagylozs-1 and Sata-75 in Hungary. The correlations with the ATNTS2004 scale show that the Badenian sedimentation began during Chron C5Br thus the earliest Badenian deposits are missing in the sections. The first occurrence of Orbulina suturalis Bronnimann has been observed in Subchron C5Bn.1r, at 14.9 Ma. Although it is older than the interpolated age of 14.74 Ma in Chron C5ADr in the ATNTS2004, it is consistent with the age of 15.1 Ma obtained from recent calibration of planktonic foraminiferal bioevents. The base of the Bulimina-Bolivina Zone has been determined at 13.7 Ma in Chron C5ABr, and the Badenian/Sarmatian boundary is recorded within Chron C5AAn, at 13.15 Ma
Pilot study of the SPRINT glycemic control protocol in a Hungarian medical intensive care unit.
Stress-induced hyperglycemia increases morbidity and mortality. Tight control can reduce mortality but has proven difficult to achieve. The SPRINT (Specialized Relative Insulin and Nutrition Tables) protocol is the only protocol that reduced both mortality and hypoglycemia by modulating both insulin and nutrition, but it has not been tested in independent hospitals. SPRINT was used for 12 adult intensive care unit patients (949 h) at Kálmán Pándy Hospital (Gyula, Hungary) as a clinical practice assessment. Insulin recommendations (0-6 U/h) were administered via constant infusion rather than bolus delivery. Nutrition was administered per local standard protocol, weaning parenteral to enteral nutrition, but was modulated per SPRINT recommendations. Measurement was every 1 to 2 h, per protocol. Glycemic performance is assessed by percentage of blood glucose (BG) measurements in glycemic bands for the cohort and per patient. Safety from hypoglycemia is assessed by numbers of patients with BG < 2.2 (severe) and %BG < 3.0 and < 4.0 mmol/liter (moderate and light). Clinical effort is assessed by measurements per day. Results are median (interquartile range). There were 742 measurements over 1088 h of control (16.4 measurements/day), which is similar to clinical SPRINT results (16.2/day). Per-patient hours of control were 65 (50-95) h. Initial per-patient BG was 10.5 (7.9-11.2) mmol/liter. All patients (100%) reached 6.1 mmol/liter. Cohort BG was 6.3 (5.5-7.5) mmol/liter, with 42.2%, 65.1% and 77.6% of BG in the 4.0-6.1, 4.0-7.0, and 4.0-8.0 mmol/liter bands. Per-patient, median percentage time in these bands was 40.2 (26.7-51.5)%, 62.5 (46.0-75.7)%, and 74.7 (61.6.8-87.8)%, respectively. No patients had BG < 2.2 mmol/liter, and the %BG < 4.0 mmol/liter was 1.9%. These results were achieved using 3.0 (3.0-5.0) U/h of insulin with 7.4 (4.4-10.2) g/h of dextrose administration (all sources) for the cohort. Per-patient median insulin administration was 3.0 (3.0-3.0) U/h and 7.1 (3.4-9.6) g/h dextrose. Higher carbohydrate nutrition formulas than were used in SPRINT are offset by slightly higher insulin administration in this study. The glycemic performance shows that using the SPRINT protocol to guide insulin infusions and nutrition administration provided very good glycemic control in initial pilot testing, with no severe hypoglycemia. The overall design of the protocol was able to be generalized with good compliance and outcomes across geographically distinct clinical units, patients, and clinical practice. © 2012 Diabetes Technology Society
Covariant Equilibrium Statistical Mechanics
A manifest covariant equilibrium statistical mechanics is constructed
starting with a 8N dimensional extended phase space which is reduced to the 6N
physical degrees of freedom using the Poincare-invariant constrained
Hamiltonian dynamics describing the micro-dynamics of the system. The reduction
of the extended phase space is initiated forcing the particles on energy shell
and fixing their individual time coordinates with help of invariant time
constraints. The Liouville equation and the equilibrium condition are
formulated in respect to the scalar global evolution parameter which is
introduced by the time fixation conditions. The applicability of the developed
approach is shown for both, the perfect gas as well as the real gas. As a
simple application the canonical partition integral of the monatomic perfect
gas is calculated and compared with other approaches. Furthermore,
thermodynamical quantities are derived. All considerations are shrinked on the
classical Boltzmann gas composed of massive particles and hence quantum effects
are discarded.Comment: 22 pages, 1 figur
SPRINT, STAR: Két Hatékony Kezelési Protokoll Az Intenzív Osztályon Kezelt Betegek Vércukorszintjének Normoglikémiás Tartományban Tartásához
(In Hungarian) Paper P0
Comparing scalar-tensor gravity and f(R)-gravity in the Newtonian limit
Recently, a strong debate has been pursued about the Newtonian limit (i.e.
small velocity and weak field) of fourth order gravity models. According to
some authors, the Newtonian limit of -gravity is equivalent to the one of
Brans-Dicke gravity with , so that the PPN parameters of these
models turn out to be ill defined. In this paper, we carefully discuss this
point considering that fourth order gravity models are dynamically equivalent
to the O'Hanlon Lagrangian. This is a special case of scalar-tensor gravity
characterized only by self-interaction potential and that, in the Newtonian
limit, this implies a non-standard behavior that cannot be compared with the
usual PPN limit of General Relativity.
The result turns out to be completely different from the one of Brans-Dicke
theory and in particular suggests that it is misleading to consider the PPN
parameters of this theory with in order to characterize the
homologous quantities of -gravity. Finally the solutions at Newtonian
level, obtained in the Jordan frame for a -gravity, reinterpreted as a
scalar-tensor theory, are linked to those in the Einstein frame.Comment: 9 page
Energy in Generic Higher Curvature Gravity Theories
We define and compute the energy of higher curvature gravity theories in
arbitrary dimensions. Generically, these theories admit constant curvature
vacua (even in the absence of an explicit cosmological constant), and
asymptotically constant curvature solutions with non-trivial energy properties.
For concreteness, we study quadratic curvature models in detail. Among them,
the one whose action is the square of the traceless Ricci tensor always has
zero energy, unlike conformal (Weyl) gravity. We also study the string-inspired
Einstein-Gauss-Bonnet model and show that both its flat and Anti-de-Sitter
vacua are stable.Comment: 18 pages, typos corrected, one footnote added, to appear in Phys.
Rev.
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