Delinquency proneness in a group of educationally retarded children

Thesis (Ed.M.)--Boston Universit

Present values of lifetime earnings of college occupations

Economic returns analysis for some occupations entered by college graduates and applications to engineering and scientific labor marke

Delinquency proneness in a group of educationally retarded children

Thesis (Ed.M.)--Boston Universit

Helmholtz decomposition theorem and Blumenthal's extension by regularization

Helmholtz decomposition theorem for vector fields is usually presented with too strong restrictions on the fields and only for time independent fields. Blumenthal showed in 1905 that decomposition is possible for any asymptotically weakly decreasing vector field. He used a regularization method in his proof which can be extended to prove the theorem even for vector fields asymptotically increasing sublinearly. Blumenthal's result is then applied to the time-dependent fields of the dipole radiation and an artificial sublinearly increasing field.Comment: 11 pages. arXiv admin note: text overlap with arXiv:1506.0023

Biconical critical dynamics

A complete two loop renormalization group calculation of the multicritical dynamics at a tetracritical or bicritical point in anisotropic antiferromagnets in an external magnetic field is performed. Although strong scaling for the two order parameters (OPs) perpendicular and parallel to the field is restored as found earlier, in the experimentally accessible region the effective dynamical exponents for the relaxation of the OPs remain different since their equal asymptotic values are not reached.Comment: 6 pages, 2 figures; some additions, corrected typo

Rippled Graphene in an In-Plane Magnetic Field: Effects of a Random Vector Potential

We report measurements of the effects of a random vector potential generated by applying an in-plane magnetic field to a graphene flake. Magnetic flux through the ripples cause orbital effects: phase-coherent weak localization is suppressed, while quasi-random Lorentz forces lead to anisotropic magnetoresistance. Distinct signatures of these two effects enable an independent estimation of the ripple amplitude and correlation length.Comment: Various changes; added appendix for Boltzmann calculation of anisotropic magnetoresistanc

Dimensional crossover of the thermodynamic properties near the phase transition to superconducting state in type I superconductors

A new approach to the treatment of magnetic fluctuations in thin films of type I superconductors is introduced. Results for the dependence of free energy, specific heat and order parameter profile on the film thickness near the equilibrium phase transition point are obtained and discussed.Comment: 7 pages, MikTe