10,756 research outputs found
Recommended from our members
The Arithmetis Mean as Approximately the Most Probable Value a Posteriori Under the Gaussian Probability Law
An Audit of export services in England: developing business focused support
One of the key thresholds in the development of small and medium sized enterprises is exporting and trading internationally. A brief review of the academic and practitioner literature highlights a number of benefits associated with exporting that include exposure to differing ways of ‘how to do’ business and opportunities for the development of joint ventures and strategic alliances. However, several regions within the United Kingdom perceive that they have too few SMEs who trade internationally. Recent estimates suggest that approximately three per cent of the SMEs in the United Kingdom are actively exporting (Bank of England, 1999). Government policy makers have responded to such concerns by providing a range of support programmes to increase the number of SMEs who trade internationally and enhance the skills and capabilities of those SMEs who export, so that they can efficiently and effectively manage the exporting and market development process.
Therefore, in the majority of the English regions, there are a range of publicly funded organisations providing advice, consultancy, information and training to SMEs wishing to trade internationally and those businesses already exporting. In addition, SMEs can access a number of export services from private sector organisations such as banks, accountants, freight forwarders and export agents.
There has been no overall national ‘stocktake’ or audit of such provision. However, the need for such a stocktake is becoming increasingly important due to the introduction of a number of new support organisations into the institutional landscape and the re-organisation and re-branding of British Trade International as Trade Partners UK and the appointment of a series of Regional International Trade Directors. The introduction of the Small Business Service will have a major impact on the coverage and nature of provision for exporting SMEs within each of the English regions. The introduction of the Small Business Service, however, provides an opportunity to explore and examine alternative configurations of small business support and the types of organisation that are best placed to satisfy the needs of exporting SMEs.
This paper presents the key findings to emerge from an audit of export services within each of the English regions. Based on a research and development project undertaken in conjunction with Trade Partners UK, the paper offers insights into:
• The coverage of export services available to SMEs within England;
• The effectiveness and appropriateness of current configuration of export services;
• The ways in which the effectiveness of the current configuration of export services could be enhanced.
The audit was based on a series of face-to-face and telephone interviews with local, regional and national providers of export provision. A key argument within the paper is that effective configurations of export and trade development support arise from insights into, and appropriate responses to, the exporting and trade development process as experienced by SMEs. The paper concludes with a number of implications in terms of how business-driven forms of support can be developed.</p
Disentanglement and Decoherence by Open System Dynamics
The destruction of quantum interference, decoherence, and the destruction of
entanglement both appear to occur under the same circumstances. To address the
connection between these two phenomena, we consider the evolution of arbitrary
initial states of a two-particle system under open system dynamics described by
a class of master equations which produce decoherence of each particle. We show
that all initial states become separable after a finite time, and we produce
the explicit form of the separated state. The result extends and amplifies an
earlier result of Di\'osi. We illustrate the general result by considering the
case in which the initial state is an EPR state (in which both the positions
and momenta of a particle pair are perfectly correlated). This example clearly
illustrates how the spreading out in phase space produced by the environment
leads to certain disentanglement conditions becoming satisfied.Comment: 15 Page
Phase Diagram of Li_xFePO_4
The phase diagram for LixFePO4 has been determined for different lithium concentrations and temperatures. The two low-temperature phases, heterosite and triphylite, have previously been shown to transform to a disordered solid solution at elevated temperatures. This disordered phase allows for a continuous transition between the heterosite and triphylite phases and is stable at relatively low temperatures. At intermediate temperatures the proposed phase diagram resembles a eutectoid system, with eutectoid point at around x=0.6 and 200°C. Kinetics of mixing and unmixing transformations are reported, including the hysteresis between heating and cooling. The enthalpy of this transition is at least 700 J/mol
Variation in Lepidopteran Occurrence in Hemlock-Dominated and Deciduous-Dominated Forests of Central Appalachia
Eastern hemlock, (Tsuga canadensis Carrière, Pinaceae), is threatened with extirpation by an exotic invasive herbivore, the hemlock woolly adelgid, (Adelges tsugae Annand, Homoptera: Adelgidae). Given this threat, a broader and more detailed knowledge of the community associated with eastern hem- lock is merited. As Lepidoptera are important members of forest communities, this study was initiated to determine the relative occurrence of Lepidoptera in hemlock-dominated and deciduous-dominated habitats by evaluating abundance, species richness, temporal variation, and composition overlap. Lepidoptera were surveyed using blacklight traps from May – August 2010 at two collection sites in the Appalachian region of eastern Kentucky. The first collection site was within a forest stand dominated by mixed deciduous species, the second site possessed an overstory of eastern hemlock. Lepidoptera ≥ 20 mm in wingspan were identified and enumerated, yielding a total of 1,020 individuals of ≥ 137 species and 18 families. The total number of Lepidoptera captured in May and June was fewer than in July and August (P ≤ 0.05). The composition of the assemblage varied between collection sites as well as seasonally; 85 species were identified at the deciduous site and 107 species were identified at the hemlock site. While 27 species were recorded only at the deciduous site, 49 species were unique to the hemlock site. Of those unique to the hemlock site, five species were either detritivores or conifer specialists. These data demonstrate the importance of both deciduous and hemlock-dominated forest habitats for many species of Lepidoptera in Appalachia. Our study forms a foundation for understanding species richness patterns of Lepidoptera in hemlock forests in North America and is a useful baseline for comparisons of richness and diversity post invasion by the hemlock woolly adelgid
Disentanglement by Dissipative Open System Dynamics
This paper investigates disentanglement as a result of evolution according to
a class of master equations which include dissipation and interparticle
interactions. Generalizing an earlier result of Di\'{o}si, the time taken for
complete disentanglement is calculated (i.e. for disentanglement from any other
system). The dynamics of two harmonically coupled oscillators is solved in
order to study the competing effects of environmental noise and interparticle
coupling on disentanglement. An argument based on separability conditions for
gaussian states is used to arrive at a set of conditions on the couplings
sufficient for all initial states to disentangle for good after a finite time.Comment: Paper in conjunction with and following on from P.J. Dodd and J.J.
Halliwell: quant-ph/031206
A genotyping protocol for multiple tissue types from the polyploid tree species Sequoia sempervirens (Cupressaceae).
Premise of the studyIdentifying clonal lineages in asexually reproducing plants using microsatellite markers is complicated by the possibility of nonidentical genotypes from the same clonal lineage due to somatic mutations, null alleles, and scoring errors. We developed and tested a clonal identification protocol that is robust to these issues for the asexually reproducing hexaploid tree species coast redwood (Sequoia sempervirens).MethodsMicrosatellite data from four previously published and two newly developed primers were scored using a modified protocol, and clones were identified using Bruvo genetic distances. The effectiveness of this clonal identification protocol was assessed using simulations and by genotyping a test set of paired samples of different tissue types from the same trees.ResultsData from simulations showed that our protocol allowed us to accurately identify clonal lineages. Multiple test samples from the same trees were identified correctly, although certain tissue type pairs had larger genetic distances on average.DiscussionThe methods described in this paper will allow for the accurate identification of coast redwood clones, facilitating future studies of the reproductive ecology of this species. The techniques used in this paper can be applied to studies of other clonal organisms as well
Mössbauer Spectrometry Study of Thermally-Activated Electronic Processes in Li_xFePO_4
The solid solution phase of Li_xFePO_4 with different Li concentrations, x, was investigated by Mössbauer spectrometry at temperatures between 25 and 210 °C. The Mössbauer spectra show a temperature dependence of their isomer shifts (E_(IS)) and electric quadrupole splittings (E_Q), typical of thermally activated, electronic relaxation processes involving ^(57)Fe ions. The activation energies for the fluctuations of E_Q and E_(IS) for Fe^(3+) are nearly the same, 570 ± 9 meV, suggesting that both originate from charge hopping. For the Fe^(2+) components of the spectra, the fluctuations of E_Q occurred at lower temperatures than the fluctuations of E_(IS), with an activation energy of 512 ± 12 meV for E_Q and one of 551 ± 7 meV for E_(IS). The more facile fluctuations of E_Q for Fe^(2+) are evidence for local motions of neighboring Li^+ ions. It appears that the electron hopping frequency is lower than that of Li^+ ions. The activation energies of relaxation did not have a measurable dependence on the concentration of lithium, x
- …