61 research outputs found
Testing He density distributions by calculations of total reaction cross-sections of He+Si
Calculations of the He + Si total reaction cross sections at
intermediate energies are performed on the basis of the Glauber-Sitenko
microscopic optical-limit model. The target-nucleus density distribution is
taken from the electron-nucleus scattering data, and the He densities
are used as they are derived in different models. The results of the
calculations are compared with the existing experimental data. The effects of
the density tails of the projectile nuclei as well as the role of shell
admixtures and short-range correlations are analyzed.Comment: 10 pages, 5 figures. Submitted to the International Journal of Modern
Physics
Quasi-Local Density Functional Theory and its Application within Extended Thomas-Fermi Approximation
A generalization of the Density Functional Theory is proposed. The theory
developed leads to single-particle equations of motion with a quasi-local
mean-field operator, which contains a quasi-particle position-dependent
effective mass and a spin-orbit potential. The energy density functional is
constructed using the Extended Thomas-Fermi approximation. Within the framework
of this approach the ground-state properties of the doubly magic nuclei are
considered. The calculations have been performed using the finite-range Gogny
D1S force. The results are compared with the exact Hartree-Fock calculations
Calculations of He+p elastic scattering cross sections using folding approach and high-energy approximation for the optical potential
Calculations of microscopic optical potentials (OP's) (their real and
imaginary parts) are performed to analyze the He+p elastic scattering data
at a few tens of MeV/nucleon (MeV/N). The OP's and the cross sections are
calculated using three model densities of He. Effects of the regularization
of the NN forces and their dependence on nuclear density are investigated.
Also, the role of the spin-orbit terms and of the non-linearity in the
calculations of the OP's, as well as effects of their renormalization are
studied. The sensitivity of the cross sections to the nuclear densities was
tested and one of them that gives a better agreement with the data was chosen.Comment: 13 pages, 11 figures, to be published in Eur. Phys. J.
Ethnicity, popular democratic movements and labour in Malaysia
This article uses framing theory to examine how activists and trade unions have framed labour’s political agenda in Malaysia. A polity grounded in ethnicity continues to hinder the formation of cross-ethnic collective worker identities and labour politics. However, inclusive popular democratising movements have strengthened in recent years, providing a favourable context for greater emphasis on non-ethnic political action by trade unions. The latter have shifted in this direction, adopting elements of the popular movement’s ‘human rights’ internationalism. Thus, the democratic movement’s frame has influenced that of the trade unions, with implications for framing theory
Charge density distributions and related form factors in neutron-rich light exotic nuclei
Charge form factors corresponding to proton density distributions in exotic
nuclei, such as He, Li, B and Be are calculated
and compared. The results can be used as tests of various theoretical models
for the exotic nuclei structure in possible future experiments using a
colliding electron-exotic nucleus storage ring. The result of such a comparison
would show the effect of the neutron halo or skin on the proton distributions
in exotic nuclei.Comment: 11 pages, 4 figures, to be published in International Journal of
Modern Physics
Supersymmetry and neutrinoless double beta decay
Neutrinoless double beta decay (0 nu beta beta) induced by superparticle exchange is investigated. Such a supersymmetric (SUSY) mechanism of 0 nu beta beta decay arises within SUSY theories with R-parity nonconservation (R(p)). We consider the minimal supersymmetric standard model (MSSM) with explicit R(p) terms in the superpotential (R(p) MSSM). The decay rate for the SUSY mechanism of 0 nu beta beta decay is calculated. Numerical values for nuclear matrix elements for the experimentally most interesting isotopes are calculated within the proton-neutron quasiparticle random phase approximation. Constraints on the R(p) MSSM parameter space are extracted from current experimental half-life limits. The most stringent limits are derived from data on Ge-76. It is shown that these constraints are more stringent than those from other low-energy processes and are competitive with or even more stringent than constraints expected from accelerator searches
A bibliography of parasites and diseases of marine and freshwater fishes of India
With the increasing demand for fish as human food, aquaculture both in freshwater
and salt water is rapidly developing over the world. In the developing countries,
fishes are being raised as food. In many countries fish farming is a very important
economic activity. The most recent branch, mariculture, has shown advances in
raising fishes in brackish, estuarine and bay waters, in which marine, anadromous and
catadromous fishes have successfully been grown and maintained
Linking Team Condition and Team Performance: A Transformational Leadership Approach
Because project teams in the construction industry shape the primary focus of the industry's project life cycle, a high-performance construction workplace facilitates employees’ technical and innovation skills through team development. Drawing on the current research in general teamwork and leadership, this study, from a theoretical perspective, extends the team condition as a hierarchical construct, incorporating six associated components. This article argues that team building and team development can be studied as ongoing processes that are crucial to project success. In order to reduce the risk of common method variance, the research analysis was completed using 94 construction teams from three different sources, within which team members rated their leader's transformational leadership behavior. The team leaders evaluated the team's conditions, and, lastly, the supervisor of each team rated the team's performance. The model shows that the team condition, which is defined as the factors that contribute to making a great team, has significant direct and indirect impacts on team performance. Furthermore, the transformational leadership behavior of team leaders showed a mediating role between the team condition and the performance
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