To evaluate the ability of arterial waveform contour analysis to measure cardiac output (CO) continuously in postoperative critically ill patients.
Thermodilution CO (TDCO) measurements were compared ...with simultaneous pulse contour CO (PCCO) measurements.
University hospital surgical intensive care unit.
29 critically ill surgical patients with indwelling systemic arterial and pulmonary artery catheters.
TDCO measurements were compared with PCCO at 1- to 2-hour intervals. Mean TDCO was 5.75 +/- 1.79 L/min, and mean PCCO was 5.76 +/- 1.83 L/min. Analysis of the difference between TDCO and PCCO showed a bias of 0.01 +/- 0.5 L/min. Comparison of the difference between pairs of sequential TDCO measurements and the initial TDCO and subsequent PCCO measurements resulted in a correlation coefficient of 0.64.
The PCCO method appears to be able to estimate changes in CO under the conditions tested, in which PCCO was recalibrated after each TDCO measurement. However, limitations of this method in the immediate postoperative period following aortic aneurysm surgery were identified.
We present the results of phi meson production in the K+K- decay channel from Au+Au collisions at root s(NN) =200 GeV as measured at midrapidity by the PHENIX detector at Brookhaven National ...Laboratory's Relativistic Heavy Ion Collider. Precision resonance centroid and width values are extracted as a function of collision centrality. No significant variation from the Particle Data Group accepted values is observed, contrary to some model predictions. The phi transverse mass spectra are fitted with a linear exponential function for which the derived inverse slope parameter is seen to be constant as a function of centrality. However, when these data are fitted by a hydrodynamic model the result is that the centrality-dependent freeze-out temperature and the expansion velocity values are consistent with the values previously derived from fitting identified charged hadron data. As a function of transverse momentum the collisions scaled peripheral-to-central yield ratio R-CP for the phi is comparable to that of pions rather than that of protons. This result lends support to theoretical models that distinguish between baryons and mesons instead of particle mass for explaining the anomalous (anti) proton yield.
In this paper we present a series of observations on the infrared spectra of DCo(CO)
4 (in comparison with HCo(CO)
4) as well as of the
l3CO-exchanged derivatives of HCo(CO)
4, EtOC(O)CH
2Co(CO)
4, ...EtOC(O)Co(CO)
4 and EtC(O)Co(CO)
4. Calculated frequencies and intensities for HCo(
12CO)
n
(
13CO)
4−
n
based on the C–O factored force field approximation predict data in excellent agreement with that observed experimentally. Splitting of the E band in the complexes R–Co(CO)
4 is shown to depend on reduction of local site symmetry and appears to be greatest for R groups containing a local dipole capable ‘of through-space’ interaction with the three equatorial carbonyls. The analysis of the infrared absorption bands for the
l3CO-substituted compounds sheds light on the nature of bonding and symmetry of these molecules, and the extent of interaction between the organic substituent and the four CO groups in the cobalt tetracarbonyl compound.
This paper describes observations on the infrared spectra of isotopically-substituted HCo(CO)
4, and of
l3CO-exchanged derivatives of EtOC(O)CH
2Co(CO)
4, EtOC(O)Co(CO)
4 and EtC(O)Co(CO)
4. Calculated frequencies and intensities for HCo(
12CO)
n
(
13CO)
4−
n
are in excellent agreement with experiment. The analysis of the infrared absorption bands for the
l3CO-substituted compounds sheds light on the nature of bonding and symmetry of these molecules.
Phys. Rev. D 102, 072008 (2020) The PHENIX experiment has measured the spin alignment for inclusive
$J/\psi\rightarrow e^{+}e^{-}$ decays in $p$+$p$ collisions at $\sqrt{s}=510$
GeV at midrapidity. ...The angular distributions have been measured in three
different polarization frames, and the three decay angular coefficients have
been extracted in a full two-dimensional analysis. Previously, PHENIX saw large
longitudinal net polarization at forward rapidity at the same collision energy.
This analysis at midrapidity, complementary to the previous PHENIX results,
sees no sizable polarization in the measured transverse momentum range of
$0.0<p_T<10.0$ GeV/$c$. The results are consistent with a previous
one-dimensional analysis at midrapidity at $\sqrt{s}=200$ GeV. The
transverse-momentum-dependent cross section for midrapidity $J/\psi$ production
has additionally been measured, and after comparison to world data we find a
simple logarithmic dependence of the cross section on $\sqrt{s}$.
Phys. Rev. D 102, 092002 (2020) The cross section of bottom quark-antiquark ($b\bar{b}$) production in
$p$+$p$ collisions at $\sqrt{s}=510$ GeV is measured with the PHENIX detector
at the ...Relativistic Heavy Ion Collider. The results are based on the yield of
high mass, like-sign muon pairs measured within the PHENIX muon arm acceptance
($1.2<|y|<2.2$). The $b\bar{b}$ signal is extracted from like-sign dimuons by
utilizing the unique properties of neutral $B$ meson oscillation. We report a
differential cross section of $d\sigma_{b\bar{b}\rightarrow \mu^\pm\mu^\pm}/dy
= 0.16 \pm 0.01~(\mbox{stat}) \pm 0.02~(\mbox{syst}) \pm 0.02~(\mbox{global})$
nb for like-sign muons in the rapidity and $p_T$ ranges $1.2<|y|<2.2$ and
$p_T>1$ GeV/$c$, and dimuon mass of 5--10 GeV/$c^2$. The extrapolated total
cross section at this energy for $b\bar{b}$ production is $13.1 \pm
0.6~(\mbox{stat}) \pm 1.5~(\mbox{syst}) \pm 2.7~(\mbox{global})~\mu$b. The
total cross section is compared to a perturbative quantum chromodynamics
calculation and is consistent within uncertainties. The azimuthal opening angle
between muon pairs from $b\bar{b}$ decays and their $p_T$ distributions are
compared to distributions generated using {\sc ps pythia 6}, which includes
next-to-leading order processes. The azimuthal correlations and pair $p_T$
distribution are not very well described by {\sc pythia} calculations, but are
still consistent within uncertainties. Flavor creation and flavor excitation
subprocesses are favored over gluon splitting.
Spontaneous GH secretory patterns were studied in 91 subjects (84 children, 2-18 yr old, at various stages of pubertal development and 7 healthy adults). Plasma GH was determined every 20 min for 6 h ...(0900-1500 h), and at least 1 spontaneous GH secretory episode (peak, greater than or equal to 5 ng/ml) was evident in 61 children and 5 of 7 adults. There was no significant difference in the mean number of GH secretory episodes or the mean 6-h plasma GH levels in 40 children with short stature compared to those in children of the same sex and pubertal maturation with normal or tall stature. The mean number of GH secretory episodes observed during the sampling period was significantly less in Tanner Stage II males (1.3 +/- 0.15) than in Tanner Stage III males (2.1 +/- 0.20; P less than 0.05). Also, the mean 6-h plasma GH level and the amplitude of the highest GH peak in Tanner Stage III (or greater) boys were greater than those in the prepubertal, early pubertal, or adult male subjects. Among females there was no difference in the number of peaks, mean 6-h plasma GH, or mean peak amplitude in prepubertal, pubertal, or adult subjects. Furthermore, there was no significant difference in overall mean 6-h plasma GH levels between male and female subjects. The frequency of GH secretory bursts was greater between 0830-0930 and 1330-1430 h. The GH secretory profiles were not different in children fed 1 or 2 meals. Children failing to show spontaneous peaks had GH deficiency secondary to central nervous system pathology (n = 10), psychosocial GH deficiency (n = 4), estrogen-dependent GH deficiency (n = 2), and optic nerve hypoplasia (n = 3). There were 2 false negatives and 2 children who were not retested. Pulsatile GH secretion is present during the daytime in children of all ages and stages of puberty. Determination of spontaneous GH secretory bursts is a safe and effective method for assessing GH deficiency.
We apply a knowledge-based segmentation method developed for still and video images to the problem of tracking missiles and high speed projectiles. Since we are only interested in segmenting a ...portion of the missile (namely, the nose cone), we use our segmentation procedure as a method of adapting thresholding. The key idea is to utilize a priori knowledge about the objects present in the image, e.g. missile and background, introduced via Bayes' rule. Posterior probabilities obtained in this way are anisotropically smoothed, and the image segmentation is obtained via MAP classifications of the smoothed data. When segmenting sequences of images, the smoothed posterior probabilities of past frames are used as prior distributions in succeeding frames.
Recent single-particle measurements from the AGS E866 experiment are presented. The transverse mass distributions and rapidity distributions of
p,
π
±,
K
±, and
p
in Au+Au central collisions as well ...as their centrality dependence are shown.
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