615 research outputs found
Generalized Action Invariants for Drift Waves-Zonal Flow Systems
Generalized action invariants are identified for various models of drift wave turbulence in the presence of the mean shear flow. It is shown that the wave kinetic equation describing the interaction of the small scale turbulence and large scale shear flow can be naturally written in terms of these invariants. Unlike the wave energy, which is conserved as a sum of small- and large- scale components, the generalized action invariant is shown to correspond to a quantity which is conserved for the small scale component alone. This invariant can be used to construct canonical variables leading to a different definition of the wave action (as compared to the case without shear flow). It is suggested that these new canonical action variables form a natural basis for the description of the drift wave turbulence with a mean shear flow
Home parenteral nutrition with an omega-3-fatty-acid-enriched MCT/LCT lipid emulsion in patients with chronic intestinal failure (the HOME study):study protocol for a randomized, controlled, multicenter, international clinical trial
BACKGROUND: Home parenteral nutrition (HPN) is a life-preserving therapy for patients with chronic intestinal failure (CIF) indicated for patients who cannot achieve their nutritional requirements by enteral intake. Intravenously administered lipid emulsions (ILEs) are an essential component of HPN, providing energy and essential fatty acids, but can become a risk factor for intestinal-failure-associated liver disease (IFALD). In HPN patients, major effort is taken in the prevention of IFALD. Novel ILEs containing a proportion of omega-3 polyunsaturated fatty acids (n-3 PUFA) could be of benefit, but the data on the use of n-3 PUFA in HPN patients are still limited. METHODS/DESIGN: The HOME study is a prospective, randomized, controlled, double-blind, multicenter, international clinical trial conducted in European hospitals that treat HPN patients. A total of 160 patients (80 per group) will be randomly assigned to receive the n-3 PUFA-enriched medium/long-chain triglyceride (MCT/LCT) ILE (Lipidem/LipoplusÂŽ 200âmg/ml, B. Braun Melsungen AG) or the MCT/LCT ILE (LipofundinÂŽ MCT/LCT/MedialipideÂŽ 20%, B. Braun Melsungen AG) for a projected period of 8 weeks. The primary endpoint is the combined change of liver function parameters (total bilirubin, aspartate transaminase and alanine transaminase) from baseline to final visit. Secondary objectives are the further evaluation of the safety and tolerability as well as the efficacy of the ILEs. DISCUSSION: Currently, there are only very few randomized controlled trials (RCTs) investigating the use of ILEs in HPN, and there are very few data at all on the use of n-3 PUFAs. The working hypothesis is that n-3 PUFA-enriched ILE is safe and well-tolerated especially with regard to liver function in patients requiring HPN. The expected outcome is to provide reliable data to support this thesis thanks to a considerable number of CIF patients, consequently to broaden the present evidence on the use of ILEs in HPN. TRIAL REGISTRATION: ClinicalTrials.gov, ID: NCT03282955. Registered on 14 September 2017
Discovery of Rubidium, Strontium, Molybdenum, and Rhodium Isotopes
Currently, thirty-one rubidium, thirty-five strontium, thirty-five molybdenum
and thirty-eight rhodium isotopes have been observed and the discovery of these
isotopes is discussed here. For each isotope a brief synopsis of the first
refereed publication, including the production and identification method, is
presented.Comment: To be published in Atomic Data and Nuclear Data Table
Research of working area development parameters in conditions of deep steep deposit finalizing
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ĐşŃŃŃĐžŃпадниŃ
ŃĐžĐ´ĐžĐ˛Đ¸Ń Đ˛ŃĐ´ĐşŃиŃиП ŃпОŃОйОП на Đ´ĐžŃŃĐťŃно ĐżĐžĐťĐžĐśĐľĐ˝Đ˝Ń ĐżĐžŃĐžŃниŃ
ŃĐ° ĐżŃОокŃниŃ
кОнŃŃŃŃв каŃâŃŃŃ. ĐŃŃанОвНонО, ŃĐž наКПонŃиК ŃĐľŃоднŃĐš кОоŃŃŃŃŃĐ˝Ń ŃОСкŃĐ¸Đ˛Ń Đ´ĐžŃŃгаŃŃŃŃŃ ĐżŃи ĐźŃĐ˝ŃПаНŃĐ˝ĐžĐźŃ ĐˇĐ˝Đ°ŃĐľĐ˝Đ˝Ń ŃŃПи ОйŃŃĐłŃв кОŃиŃĐ˝ĐžŃ ĐşĐžĐżĐ°ĐťĐ¸Đ˝Đ¸ ĐżŃикОнŃŃŃĐ˝ĐžŃ ĐˇĐžĐ˝Đ¸ НоМаŃОгО Ń Đ˛Đ¸ŃŃŃОгО йОкŃв ĐżĐžĐşĐťĐ°Đ´Ń Đ˛ ĐżŃОокŃĐ˝ĐžĐźŃ ĐżĐžĐťĐžĐśĐľĐ˝Đ˝Ń. ĐаКПонŃиК пОŃĐžŃниК кОоŃŃŃŃŃĐ˝Ń ŃОСкŃĐ¸Đ˛Ń Đ´ĐžŃŃгаŃŃŃŃŃ ĐżŃи ĐźŃĐ˝ŃПаНŃĐ˝ĐžĐźŃ ĐˇĐ˝Đ°ŃĐľĐ˝Đ˝Ń ŃŃПи ОйŃŃĐłŃв кОŃиŃĐ˝ĐžŃ ĐşĐžĐżĐ°ĐťĐ¸Đ˝Đ¸ ĐżŃикОнŃŃŃĐ˝ĐžŃ ĐˇĐžĐ˝Đ¸ НоМаŃОгО Ń Đ˛Đ¸ŃŃŃОгО йОкŃв пОкНадŃ, Đ° ŃакОМ ŃОйОŃОгО йОŃŃŃ ĐşĐ°Ń'ŃŃŃ Đ˛ пОŃĐžŃĐ˝ĐžĐźŃ ĐżĐžĐťĐžĐśĐľĐ˝Đ˝Ń
The state of the Martian climate
60°N was +2.0°C, relative to the 1981â2010 average value (Fig. 5.1). This marks a new high for the record. The average annual surface air temperature (SAT) anomaly for 2016 for land stations north of starting in 1900, and is a significant increase over the previous highest value of +1.2°C, which was observed in 2007, 2011, and 2015. Average global annual temperatures also showed record values in 2015 and 2016. Currently, the Arctic is warming at more than twice the rate of lower latitudes
Search for a W' boson decaying to a bottom quark and a top quark in pp collisions at sqrt(s) = 7 TeV
Results are presented from a search for a W' boson using a dataset
corresponding to 5.0 inverse femtobarns of integrated luminosity collected
during 2011 by the CMS experiment at the LHC in pp collisions at sqrt(s)=7 TeV.
The W' boson is modeled as a heavy W boson, but different scenarios for the
couplings to fermions are considered, involving both left-handed and
right-handed chiral projections of the fermions, as well as an arbitrary
mixture of the two. The search is performed in the decay channel W' to t b,
leading to a final state signature with a single lepton (e, mu), missing
transverse energy, and jets, at least one of which is tagged as a b-jet. A W'
boson that couples to fermions with the same coupling constant as the W, but to
the right-handed rather than left-handed chiral projections, is excluded for
masses below 1.85 TeV at the 95% confidence level. For the first time using LHC
data, constraints on the W' gauge coupling for a set of left- and right-handed
coupling combinations have been placed. These results represent a significant
improvement over previously published limits.Comment: Submitted to Physics Letters B. Replaced with version publishe
Search for the standard model Higgs boson decaying into two photons in pp collisions at sqrt(s)=7 TeV
A search for a Higgs boson decaying into two photons is described. The
analysis is performed using a dataset recorded by the CMS experiment at the LHC
from pp collisions at a centre-of-mass energy of 7 TeV, which corresponds to an
integrated luminosity of 4.8 inverse femtobarns. Limits are set on the cross
section of the standard model Higgs boson decaying to two photons. The expected
exclusion limit at 95% confidence level is between 1.4 and 2.4 times the
standard model cross section in the mass range between 110 and 150 GeV. The
analysis of the data excludes, at 95% confidence level, the standard model
Higgs boson decaying into two photons in the mass range 128 to 132 GeV. The
largest excess of events above the expected standard model background is
observed for a Higgs boson mass hypothesis of 124 GeV with a local significance
of 3.1 sigma. The global significance of observing an excess with a local
significance greater than 3.1 sigma anywhere in the search range 110-150 GeV is
estimated to be 1.8 sigma. More data are required to ascertain the origin of
this excess.Comment: Submitted to Physics Letters
Measurement of the Lambda(b) cross section and the anti-Lambda(b) to Lambda(b) ratio with Lambda(b) to J/Psi Lambda decays in pp collisions at sqrt(s) = 7 TeV
The Lambda(b) differential production cross section and the cross section
ratio anti-Lambda(b)/Lambda(b) are measured as functions of transverse momentum
pt(Lambda(b)) and rapidity abs(y(Lambda(b))) in pp collisions at sqrt(s) = 7
TeV using data collected by the CMS experiment at the LHC. The measurements are
based on Lambda(b) decays reconstructed in the exclusive final state J/Psi
Lambda, with the subsequent decays J/Psi to an opposite-sign muon pair and
Lambda to proton pion, using a data sample corresponding to an integrated
luminosity of 1.9 inverse femtobarns. The product of the cross section times
the branching ratio for Lambda(b) to J/Psi Lambda versus pt(Lambda(b)) falls
faster than that of b mesons. The measured value of the cross section times the
branching ratio for pt(Lambda(b)) > 10 GeV and abs(y(Lambda(b))) < 2.0 is 1.06
+/- 0.06 +/- 0.12 nb, and the integrated cross section ratio for
anti-Lambda(b)/Lambda(b) is 1.02 +/- 0.07 +/- 0.09, where the uncertainties are
statistical and systematic, respectively.Comment: Submitted to Physics Letters
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