4,255 research outputs found
Perceptions of Social Work and Collaboration with Clinical Social Workers: Clergy Perspectives
Social workers provide services to meet the needs of individuals, communities and society. Due to limited funding and high need, social workers may need to collaborate with other professionals to meet the needs. The clergy are one such group of professionals. They encounter a variety of needs presented by their parishioners and the communities to which they belong. This qualitative research study sought to identify clergy persons’ perceptions of social workers and perspectives on collaborating with social workers. Individual interviews were held with eight Protestant clergy persons holding a Master of Divinity degree and serving in suburban parishes. The major themes that emerged from the data were: 1) social workers meet the needs of individuals and communities; 2) clergy have favorable perceptions of social workers; 3) clergy have collaborated with social workers in the past; 4) clergy desire collaboration with social workers; 5) clergy felt barriers to collaboration exist; 5) barriers could be overcome by social workers seeking out relationships with clergy. Implications for social work and recommendations for future research are discussed
Uniqueness of a Negative Mode About a Bounce Solution
We consider the uniqueness problem of a negative eigenvalue in the spectrum
of small fluctuations about a bounce solution in a multidimensional case. Our
approach is based on the concept of conjugate points from Morse theory and is a
natural generalization of the nodal theorem approach usually used in one
dimensional case. We show that bounce solution has exactly one conjugate point
at with multiplicity one.Comment: 4 pages,LaTe
On the Maxwell-Stefan approach to multicomponent diffusion
We consider the system of Maxwell-Stefan equations which describe
multicomponent diffusive fluxes in non-dilute solutions or gas mixtures. We
apply the Perron-Frobenius theorem to the irreducible and quasi-positive matrix
which governs the flux-force relations and are able to show normal ellipticity
of the associated multicomponent diffusion operator. This provides
local-in-time wellposedness of the Maxwell-Stefan multicomponent diffusion
system in the isobaric, isothermal case.Comment: Based on a talk given at the Conference on Nonlinear Parabolic
Problems in Bedlewo, Mai 200
Phylogenetic affiliation and quantification of psychrophilic sulfate-reducing isolates in marine Arctic sediments
Thirteen psychrophilic sulfate-reducing isolates from two permanently cold fjords of the Arctic island Spitsbergen (Hornsund and Storfjord) were phylogenetically analyzed. They all belonged to the delta subclass of Proteobacteria. and were widely distributed within this group, indicating that psychrophily is a polyphyletic property. A new 16S rRNA-directed oligonucleotide probe was designed against the largest coherent cluster of these isolates. The new probe, as well as a set of available probes,was applied in rRNA slot blot hybridization to investigate the composition of the sulfate-reducing :bacterial community in the sediments. rRNA related to the new cluster of incompletely oxidizing, psychrophilic isolates made up 1.4 to 20.9% of eubacterial rRNA at Storfjord and 0.6 to 3.5% of eubacterial rRNA at Hornsund. This group was the second-most-abundant group of sulfate reducers at these sites. Denaturing gradient gel electrophoresis and hybridization analysis showed bands identical to those produced by our isolates. The data indicate that the psychrophilic isolates are quantitatively important in Svalbard sediments
Efficient Spatial Redistribution of Quantum Dot Spontaneous Emission from 2D Photonic Crystals
We investigate the modification of the spontaneous emission dynamics and
external quantum efficiency for self-assembled InGaAs quantum dots coupled to
extended and localised photonic states in GaAs 2D-photonic crystals. The
2D-photonic bandgap is shown to give rise to a 5-10 times enhancement of the
external quantum efficiency whilst the spontaneous emission rate is
simultaneously reduced by a comparable factor. Our findings are quantitatively
explained by a modal redistribution of spontaneous emission due to the modified
local density of photonic states. The results suggest that quantum dots
embedded within 2D-photonic crystals are suitable for practical single photon
sources with high external efficiency
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