6,937 research outputs found
Skyrmion vibrational energies with a generalized mass term
We study various properties of a one parameter mass term for the Skyrme
model, originating from the works of Kopeliovich, Piette and Zakrzewski,
through the use of axially symmetric solutions obtained numerically by
simulated-annealing. These solutions allow us to observe asymptotic behaviors
of the B=2 binding energies that differ to those previously obtained. We also
decipher the characteristics of three distinct vibrational modes that appear as
eigenstates of the vibrational Hamiltonian. This analysis further examine the
assertion that the one parameter mass term offers a better account of baryonic
matter than the traditional mass term.Comment: 12 pages, 8 figure
Study of ISM tracers in galaxies
We collected data for two samples of normal and interacting galaxies for a
total of 2953 galaxies having fluxes in one or more of the following wavebands:
FIR, 21 cm line, CO(1-0) lines and soft X-ray. The large set of data obtained
allowed us to revisit some of the already known relations between the different
tracers of the interstellar medium (ISM), such as the link between the FIR flux
and the CO line emission, the relation between X-ray emission and the blue or
FIR luminosity. The relation lacking from observations for early-type galaxies
has been discussed and explained in detail in the frame of a suitable
theoretical model, obtained by coupling chemo-dynamical N-body simulations with
a dusty spectrophotometric code of population synthesis.Comment: 2 pages, o appear in the Proceedings of the Conf. "From Stars to
Galaxies: Building the Pieces to Build Up the Universe", Vallenari et al.
eds., ASP Conf. Serie
Improving Marital Satisfaction Using a Structured Facilitation Program in Three Southern Maine Congregations
Problem. Marital satisfaction for couples in general, and among members of the Seventh-day Adventist church in particular, needs to be improved. Research indicates that marital well being and longevity are critical issues facing both the church and the wider culture. Development of strategies and programs designed to increase happiness within the marital union are vital for strengthening family, church, and community.
Method. A structured facilitation marriage enrichment program was developed and presented by the researcher and his wife in three Seventh-day Adventist churches in southern Maine over a ten week period. A pre-test and an identical post-test were administered to volunteer married participants at the beginning and end of the program. Results were tabulated to evaluate the effect of the program on the marital satisfaction of the couples in ten specific areas.
Results. All areas surveyed demonstrated an increase in marital satisfaction over the 10- week program. Statistically significant (p \u3c .05) positive outcomes for marital satisfaction were found in 7 out of the 10 areas surveyed.
Conclusions. This study demonstrates the value of conducting research-based marriage enrichment programs in order to improve the marital satisfaction of married couples in the Seventh-day Adventist church. Larger sample studies would be helpful in the future to determine if results are replicated for similar marriage enrichment programs. Longitudinal studies could prove beneficial in evaluating the positive duration of the change in marital satisfaction
Polyelectrolyte multilayer films as backflushable nanofiltration membranes with tunable hydrophilicity and surface charge
A diverse set of supported polyelectrolyte multilayer (PEM) membranes with controllable surface charge, hydrophilicity, and permeability to water and salt was designed by choosing constituent polyelectrolytes and by adjusting conditions of their deposition. The membranes were characterized in terms of their water and MgSO4 permeabilities and resistance to colloidal fouling. The commercial nanofiltration membrane (NF270) was used as a comparative basis. Highly hydrophilic and charged PEMs could be designed. For all membranes, MgSO4 permeability coefficients of NF270 and all PEM membranes exhibited a power law dependence on concentration: Ps [is proportional to] C-[tau], 0.19 < [tau] < 0.83. PEM membranes were highly selective and capable of nearly complete intrinsic rejection of MgSO4 at sufficiently high fluxes. With the deposition of colloids onto the PEM surface, the separation properties of one type of polyelectrolyte membrane showed similar rejection and superior flux properties compared to NF270 membranes. We hypothesize that a PEM-colloid nanocomposite was formed as a result of colloidal fouling of these PEM films. The feasibility of regenerating the PEM membranes fouled by colloids was also demonstrated. In summary, the PEM-based approach to membrane preparation was shown to enable the design of membranes with the unique combination of desirable ion separation characteristics and regenerability of the separation layer
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