124 research outputs found
How will Brexit affect the offshore wind industry in the UK?
The home market effect is the clustering of an internationally traded sector in the country with the largest domestic market. It relies upon agglomeration benefits which means that firms see productivity improvements from clustering, and trade costs which firms choose their location in order to minimise. In the absence of agglomeration benefits, firms would all locate in their local markets and the sector would be associated with no imports or exports. In the absence of trade costs, firms would all cluster in one market, but would be indifferent about which market this was. With both agglomeration benefits and trade costs, an industry is likely to cluster in a country with a large domestic market and provide exports to smaller markets. The UK has a very large potential offshore wind resource, and the UK Government has produced plans for the growth of the offshore wind sector that imply increased UK content in the supply chain and an increase in UK exports from this supply chain. This looks like the home market effect in action. In this paper we use an Input-Output (IO) modelling approach to assess the direct, indirect and induced economic consequences of the development of the offshore wind energy industry and its supply chain for the whole of the UK economy. The results of this IO analysis provide the “data” needed to calibrate a trade model which allows for home market effects. This baseline calibration replicates the UK Government projection for the growth of the offshore wind industry (by construction). However, Brexit is estimated to raise trade costs with the rest of the European Union, and so we can simulate Brexit by raising trade costs, and ask the counterfactual question of whether Brexit increases or decreases, ceteris paribus, the growth of the offshore wind industry in the UK
Recent Developments in Modeling Heteroepitaxy/Heterogeneous Nucleation by Dynamical Density Functional Theory
Crystallization of supersaturated liquids usually starts by epitaxial growth or by heterogeneous
nucleation on foreign surfaces. Herein, we review recent advances made in modeling
heteroepitaxy and heterogeneous nucleation on flat/modulated surfaces and nanoparticles
within the framework of a simple dynamical density functional theory, known as the phase-field
crystal model. It will be shown that the contact angle and the nucleation barrier are nonmonotonous
functions of the lattice mismatch between the substrate and the crystalline phase.
In continuous cooling studies for substrates with lattice mismatch, we recover qualitatively the
Matthews–Blakeslee mechanism of stress release via the misfit dislocations. The simulations
performed for particle-induced freezing will be confronted with recent analytical results,
exploring thus the validity range of the latter. It will be demonstrated that time-dependent
studies are essential, as investigations based on equilibrium properties often cannot identify the
preferred nucleation pathways. Modeling of these phenomena is essential for designing materials
on the basis of controlled nucleation and/or nano-patterning
Search for the Rare Decays J/Psi --> Ds- e+ nu_e, J/Psi --> D- e+ nu_e, and J/Psi --> D0bar e+ e-
We report on a search for the decays J/Psi --> Ds- e+ nu_e + c.c., J/Psi -->
D- e+ nu_e + c.c., and J/Psi --> D0bar e+ e- + c.c. in a sample of 5.8 * 10^7
J/Psi events collected with the BESII detector at the BEPC. No excess of signal
above background is observed, and 90% confidence level upper limits on the
branching fractions are set: B(J/Psi --> Ds- e+ nu_e + c.c.)<4.8*10^-5, B(J/Psi
--> D- e+ nu_e + c.c.) D0bar e+ e- + c.c.)<1.1*10^-5Comment: 10 pages, 4 figure
Direct Measurements of the Branching Fractions for and and Determinations of the Form Factors and
The absolute branching fractions for the decays and
are determined using singly
tagged sample from the data collected around 3.773 GeV with the
BES-II detector at the BEPC. In the system recoiling against the singly tagged
meson, events for and events for decays are observed. Those yield
the absolute branching fractions to be and . The
vector form factors are determined to be
and . The ratio of the two form
factors is measured to be .Comment: 6 pages, 5 figure
Study of J/psi decays to Lambda Lambdabar and Sigma0 Sigma0bar
The branching ratios and Angular distributions for J/psi decays to Lambda
Lambdabar and Sigma0 Sigma0bar are measured using BESII 58 million J/psi.Comment: 11 pages, 5 figure
Measurements of J/psi Decays into 2(pi+pi-)eta and 3(pi+pi-)eta
Based on a sample of 5.8X 10^7 J/psi events taken with the BESII detector,
the branching fractions of J/psi--> 2(pi+pi-)eta and J/psi-->3(pi+pi-)eta are
measured for the first time to be (2.26+-0.08+-0.27)X10^{-3} and
(7.24+-0.96+-1.11)X10^{-4}, respectively.Comment: 11 pages, 6 figure
Partial Wave Analysis of
BES data on are presented. The
contribution peaks strongly near threshold. It is fitted with a
broad resonance with mass MeV, width MeV. A broad resonance peaking at 2020 MeV is also required
with width MeV. There is further evidence for a component
peaking at 2.55 GeV. The non- contribution is close to phase
space; it peaks at 2.6 GeV and is very different from .Comment: 15 pages, 6 figures, 1 table, Submitted to PL
BESII Detector Simulation
A Monte Carlo program based on Geant3 has been developed for BESII detector
simulation. The organization of the program is outlined, and the digitization
procedure for simulating the response of various sub-detectors is described.
Comparisons with data show that the performance of the program is generally
satisfactory.Comment: 17 pages, 14 figures, uses elsart.cls, to be submitted to NIM
Measurement of branching fractions for the inclusive Cabibbo-favored ~K*0(892) and Cabibbo-suppressed K*0(892) decays of neutral and charged D mesons
The branching fractions for the inclusive Cabibbo-favored ~K*0 and
Cabibbo-suppressed K*0 decays of D mesons are measured based on a data sample
of 33 pb-1 collected at and around the center-of-mass energy of 3.773 GeV with
the BES-II detector at the BEPC collider. The branching fractions for the
decays D+(0) -> ~K*0(892)X and D0 -> K*0(892)X are determined to be BF(D0 ->
\~K*0X) = (8.7 +/- 4.0 +/- 1.2)%, BF(D+ -> ~K*0X) = (23.2 +/- 4.5 +/- 3.0)% and
BF(D0 -> K*0X) = (2.8 +/- 1.2 +/- 0.4)%. An upper limit on the branching
fraction at 90% C.L. for the decay D+ -> K*0(892)X is set to be BF(D+ -> K*0X)
< 6.6%
Study of
New data are presented on from a sample of 58M
events in the upgraded BES II detector at the BEPC. There is a
conspicuous signal for and a peak at higher mass which
may be fitted with . From a combined analysis with
data, the branching ratio
is at the 95%
confidence level.Comment: 11 pages, 5 figures. Submitted to Phys. Lett.
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