939 research outputs found
The Marshall plan and its achievements
Thesis (M.A.)--Boston UniversityIn conclusion, we may find that the world trade is fundamentally out of balance. Other countries simply are not earning enough dollars to pay for what they import from us. They have a "dollar shortage". It was mainly because of: loss of the Western European's overseas investment; reduced imports by the United States; and lastly, the rise in prices of importing primary commodity prices.
The critical lack of balance in world trade should be corrected primarily by stimulating an expansion or exports of goods and services from other countries to the United States, accompanied by an expansion, as far as feasible, or United States foreign invesment. The task is to be achieved by mutual cooperation of both business and government on both sides of the Atlantic
Detection of 40-48 GHz dust continuum linear polarization towards the Class 0 young stellar object IRAS 16293-2422
We performed the new JVLA full polarization observations at 40-48 GHz
(6.3-7.5 mm) towards the nearby ( 1473.4 pc) Class 0 YSO IRAS
16293-2422, and compare with the previous SMA observations reported by Rao et
al. (2009; 2014). We observed the quasar J1407+2827 which is weakly polarized
and can be used as a leakage term calibrator for 9 GHz observations, to
gauge the potential residual polarization leakage after calibration. We did not
detect Stokes Q, U, and V intensities from the observations of J1407+2827, and
constrain (3-) the residual polarization leakage after calibration to
be 0.3\%. We detect linear polarization from one of the two binary
components of our target source, IRAS\,16293-2422\,B. The derived polarization
position angles from our observations are in excellent agreement with those
detected from the previous observations of the SMA, implying that on the
spatial scale we are probing (50-1000 au), the physical mechanisms for
polarizing the continuum emission do not vary significantly over the wavelength
range of 0.88-7.5 mm. We hypothesize that the observed polarization
position angles trace the magnetic field which converges from large scale to an
approximately face-on rotating accretion flow. In this scenario, magnetic field
is predominantly poloidal on 100 au scales, and becomes toroidal on smaller
scales. However, this interpretation remains uncertain due to the high dust
optical depths at the central region of IRAS\,16293-2422\,B and the uncertain
temperature profile. We suggest that dust polarization at wavelengths
comparable or longer than 7\,mm may still trace interstellar magnetic field.
Future sensitive observations of dust polarization in the fully optically thin
regime will have paramount importance for unambiguously resolving the magnetic
field configuration.Comment: 14 pages, 7 figures, accepted to A&A. Comments are welcom
Higgs to from Vector Boson Fusion for High-Scale Physics
Vector boson fusion is arguably the most direct collider probe of electroweak
symmetry breaking. Typically, the signature includes two forward/backward jets
with low transverse momenta with a scale that is set by the mass of the vector
boson. For this reason, an upper cut is used when searching for vector boson
fusion processes in the Standard Model. Alternatively, the upper cut on the
forward jets can be removed and the high-momentum exchange region of vector
boson fusion can be studied. This phase space region has sensitivity to new
physics via higher dimensional operators and form factors. In this work, we
study the high-momentum region of the vector boson fusion channel where the
Higgs decays to . We show that, depending on the form of new physics,
the limits on the new physics scale range from 0.5 TeV to 1.8 TeV.Comment: 19 pages, 8 figures, 2 table
Adolescent pursuit of health information online during the COVID-19 pandemic: the roles played by eHealth literacy and psychological distress
Plasma metabolomic profiles predict near-term death among individuals with lower extremity peripheral arterial disease
BackgroundIndividuals with peripheral arterial disease (PAD) have a nearly two-fold increased risk of all-cause and cardiovascular disease mortality compared to those without PAD. This pilot study determined whether metabolomic profiling can accurately identify patients with PAD who are at increased risk of near-term mortality.MethodsWe completed a case-control study using 1H NMR metabolomic profiling of plasma from 20 decedents with PAD, without critical limb ischemia, who had blood drawn within 8 months prior to death (index blood draw) and within 10 to 28 months prior to death (preindex blood draw). Twenty-one PAD participants who survived more than 30 months after their index blood draw served as a control population.ResultsResults showed distinct metabolomic patterns between preindex decedent, index decedent, and survivor samples. The major chemical signals contributing to the differential pattern (between survivors and decedents) arose from the fatty acyl chain protons of lipoproteins and the choline head group protons of phospholipids. Using the top 40 chemical signals for which the intensity was most distinct between survivor and preindex decedent samples, classification models predicted near-term all-cause death with overall accuracy of 78% (32/41), a sensitivity of 85% (17/20), and a specificity of 71% (15/21). When comparing survivor with index decedent samples, the overall classification accuracy was optimal at 83% (34/41) with a sensitivity of 80% (16/20) and a specificity of 86% (18/21), using as few as the top 10 to 20 chemical signals.ConclusionsOur results suggest that metabolomic profiling of plasma may be useful for identifying PAD patients at increased risk for near-term death. Larger studies using more sensitive metabolomic techniques are needed to identify specific metabolic pathways associated with increased risk of near-term all-cause mortality among PAD patients
- …