21 research outputs found
Average AOD<sup>*</sup> in different spatio-temporal groups.
<p>The black line shows the AOD<sup>*</sup><sub>annual</sub> over the entire study region as a reference. The average AOD<sup>*</sup> during the heating season in the heating area was consistently higher than other spatio-temporal groups.</p
Summary statistics of meteorological and social-economic parameters.
<p>Summary statistics of meteorological and social-economic parameters.</p
Spatial distribution of average AOD*annual from 2004â2012.
<p>The blue line along the Qin Mountains and Huai River is the traditional dividing line between north and south China. AOD<sup>*</sup><sub>annual</sub> varied greatly across the study domain and north China has higher aerosol loading relative to south China generally.</p
Estimates of parameters in the linear regression models.
<p><sup>a</sup>p-value< 0.01</p><p>Estimates of parameters in the linear regression models.</p
Phase-Changing Bistable Electroactive Polymer Exhibiting Sharp Rigid-to-Rubbery Transition
A phase-changing polymer comprising
stearyl acrylate and a long-chain
urethane diacrylate was studied as a new bistable electroactive polymer.
The abrupt and reversible phase transition of the crystalline aggregates
of the stearyl moieties results in a rapid shift between the rigid
and rubbery states of the polymers during temperature cycles. The
transition temperature is tunable between 34â46 °C. A
storage modulus change of âŒ1000 fold can be obtained within
a narrow temperature range of 10 °C. The polymer shows excellent
shape memory properties with both fixation rate and recovery rate
close to 100%. Diaphragm actuators based on the polymer thin films
were electrically actuated up to 70% strain at 50 °C. The actuated
shape can be âfrozenâ after the films were allowed to
cool below the transition temperature. This rigid-to-rigid deformation
is refreshable and repeatable via the rigid-to-rubbery transition
and electrical actuation in the rubbery state
Primary Product Branching in the Photodissociation of Chloroacetaldehyde at 157 nm
We
used crossed laser-molecular beam scattering to study the primary
photodissociation channels of chloroacetaldehyde (CH<sub>2</sub>ClCHO)
at 157 nm. In addition to the CâCl bond fission primary photodissociation
channel, the data evidence two other photodissociation channels: HCl
photoelimination and CâC bond fission. This is the first direct
evidence of the CâC bond fission channel in chloroacetaldehyde,
and we found that it significantly competes with the CâCl bond
fission channel. We determined the total primary photodissociation
branching fractions for CâCl fission:HCl elimination:CâC
fission to be 0.65:0.07:0.28. The branching between the primary channels
suggests the presence of interesting excited state dynamics in chloroacetaldehyde.
Some of the vinoxy radicals from CâCl photofission and most
of the ketene cofragments formed in HCl photoelimination have enough
internal energy to undergo secondary dissociation. While our previous
velocity map imaging study on the photodissociation of chloroacetaldehyde
at 157 nm focused on the barrier for the unimolecular dissociation
of vinoxy to H + ketene, this work shows that the HCl elimination
channel contributed to the high kinetic energy portion of the <i>m</i>/<i>z</i> = 42 signal in that study
Trends in risk of multiple in-hospital clinical outcomes with increasing number of prior medications used.
<p>HR: heart rate; MACEs: major adverse cardiovascular events; OR: odd ratio; SBP: systolic blood pressure; STEMI: ST-segment elevation myocardial infarction;</p
Multiple clinical outcomes (%) by prior medications use and multi-variable adjusted ORs (95%CI) among ACS patients.
<p>Multiple clinical outcomes (%) by prior medications use and multi-variable adjusted ORs (95%CI) among ACS patients.</p
Bleeding (%) by prior antiplatelet agents use and multi-variable adjusted ORs (95%CI) among ACS patients (%).
<p>Bleeding (%) by prior antiplatelet agents use and multi-variable adjusted ORs (95%CI) among ACS patients (%).</p
Baseline characteristics of ACS patients by prior use of four recommended medications.
<p>Baseline characteristics of ACS patients by prior use of four recommended medications.</p