5,798 research outputs found
Associated production of a neutral top-Higgs with a heavy-quark pair in the \gamma\gamma collisions at ILC
We have studied the associated production processes of a neutral top-Higgs in
the topcolor assisted technicolor model with a pair of heavy quarks in
\gamma\gamma collisions at the International Linear Collider (ILC). We find
that the cross section for t\bar{t}h_t in \gamma\gamma collisions is at the
level of a few fb with the c.m. energy \sqrt{s}=1000 GeV, which is consistent
with the results of the cross section of t\bar{t}H in the standard model and
the cross section of t\bar{t}h in the minimal supersymmetric standard modeland
the little Higgs models. It should be distinct that hundreds of to thousands of
h_t per year can be produced at the ILC, this process of \gamma\gamma \to
t\bar{t}h_t is really interesting in testing the standard model and searching
the signs of technicolor.Comment: 4 pages, 4 figures, some references are adde
GW26-e1527 Value of neutrophils count in predicting surgery related acute kidney injury in CKD with hypertensive patients: a cohort study
Sub-daily simulation of mountain flood processes based on the modified soil water assessment tool (SWAT) model
Floods not only provide a large amount of water resources, but they also cause serious disasters. Although there have been numerous hydrological studies on flood processes, most of these investigations were based on rainfall-type floods in plain areas. Few studies have examined high temporal resolution snowmelt floods in high-altitude mountainous areas. The Soil Water Assessment Tool (SWAT) model is a typical semi-distributed, hydrological model widely used in runoff and water quality simulations. The degree-day factor method used in SWAT utilizes only the average daily temperature as the criterion of snow melting and ignores the influence of accumulated temperature. Therefore, the influence of accumulated temperature on snowmelt was added by increasing the discriminating conditions of rain and snow, making that more suitable for the simulation of snowmelt processes in high-altitude mountainous areas. On the basis of the daily scale, the simulation of the flood process was modeled on an hourly scale. This research compared the results before and after the modification and revealed that the peak error decreased by 77% and the time error was reduced from +/- 11 h to +/- 1 h. This study provides an important reference for flood simulation and forecasting in mountainous areas
2000-2003 Real Estate Bubble in the UK but not in the USA
In the aftermath of the burst of the ``new economy'' bubble in 2000, the
Federal Reserve aggressively reduced short-term rates yields in less than two
years from 6.5% to 1.25% in an attempt to coax forth a stronger recovery of the
US economy. But, there is growing apprehension that this is creating a new
bubble in real estate, as strong housing demand is fuelled by historically low
mortgage rates. Are we going from Charybdis to Scylla? This question is all the
more excruciating at a time when many other indicators suggest a significant
deflationary risk. Using economic data, Federal Reserve Chairman A. Greenspan
and Governor D.L. Kohn dismissed recently this possibility. Using the theory of
critical phenomena resulting from positive feedbacks in markets, we confirm
this view point for the US but find that mayhem may be in store for the UK: we
unearth the unmistakable signatures (log-periodicity and power law
super-exponential acceleration) of a strong unsustainable bubble there, which
could burst before the end of the year 2003.Comment: Latex, 22 pages including 8 eps figures; A revised version accepted
for publication in Physica
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Polyethylene microplastics impede the innate immune response by disrupting the extracellular matrix and signaling transduction
A Stacked Microstrip Antenna Array with Fractal Patches
A novel microstrip antenna array, which utilizes Giuseppe Peano fractal shaped patches as its radiation elements and adopts a two-layer stacked structure for achieving both wideband and high-gain properties, is proposed. Parametric study estimates that the proposed antenna’s size can be arbitrarily adjusted by changing the fractal proportion while high aperture efficiency is maintained. Two prototypes with 2 × 2 and 4 × 4 fractal patches, respectively, on each layer are designed, fabricated, and measured. Both simulation and measurement results demonstrate that the proposed antenna possesses encouraging performances of wideband, high directivity, and high aperture efficiency simultaneously; for example, for the two prototypes, their S11<-10 dB impedance bandwidths are 23.49% and 18.49%, respectively; at the working frequency of 5.8 GHz, their directivities are 12.2 dBi and 18.2 dBi, and their corresponding aperture efficiencies are up to 91.0% and 90.5%, respectively
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