Biomedical subjects

J Wuttke

Publications and source records attributed to J Wuttke.

10 recordsLinked to original sources

PubMed2001

Calcium rubidium nitrate: mode-coupling beta scaling without factorization.

The fast dynamics of viscous calcium rubidium nitrate is investigated by depolarized light scattering, neutron scattering, and dielectric loss. Fast beta relaxation evolves as in calcium potassium nitrate. The dynamic susceptibilities can be described by the asymptotic scaling law of mode-coupling theory with a shape parameter lambda=0.79; the temperature dependence of the amplitudes extrapolates to T(c) approximately equal 378 K. However, the frequencies of the minima of the three different spectroscopies never coincide, in conflict with the factorization prediction, indicating that the true asymptotic regime is unreachable.

Journal Article↗

PubMed2000

Multiple-scattering effects on smooth neutron-scattering spectra

Elastic and inelastic incoherent neutron-scattering experiments are simulated for simple models: a rigid solid (as used for normalization), a glass (with a smooth distribution of harmonic vibrations), and a viscous liquid (described by schematic mode-coupling equations). In cases where the input scattering law factorizes into a wave-number-dependent amplitude and a frequency-dependent spectral distribution, the latter is only weakly affected by multiple scattering, whereas the former is severely distorted.

Journal Article↗

PubMed1997

St. Thomas Immunization Initiative. A student-run community action project.

The objectives of the St Thomas Immunization Initiative are to provide a clinical community medicine experience for first- and second-year medical students, expose students to a community immunization program, teach students the principles of a community immunization program, and demonstrate a working relationship between the residents of an underserved community and medical students. From 1993 to 1995, first- and second-year students at Tulane University Medical School participated in class projects known as Shots for Tots and the St Thomas Immunization Initiative. Students received instruction about immunizations and administered vaccinations to children and adults in low-income neighborhoods. A total of 754 immunizations were administered to 331 children from 1993 to 1995. Participating students were surveyed and 82% of those who responded to a questionnaire felt that the project benefited the community it served while 79% felt that they personally benefitted from participating in the project. Given their experience, 96% of the students would be more likely to participate in a community development project in the future.

Adult↗

PubMed1996