11,716 research outputs found
Determination of fracture toughness parameter of large metal structures Industrial review
Fracture toughness and resistance determined for large steel structures using stress intensity calculations - fracture mechanic
What do we (need to) know about low-susceptibility of codling moth against Cydia pomonella granulovirus (CpGV)!
In 2005, the first codling moth (CM) populations with a reduced susceptibility to Cydia pomonella granulovi-rus (CpGV) products have been observed. This phenomenon might be an indicator of an emerging resis-tance of CM to CpGV. This paper summarizes some aspects of CM CpGV interaction and discusses poten-tial mechanisms in the host virus interaction, which could contribute to the observed low susceptibility. In order to develop and implement successful resistance management strategies, much more knowledge about the plasticity of CM CpGV interaction and the diversity of CM populations is essential
Diffusion imaging and tractography of congenital brain malformations.
Diffusion imaging is an MRI modality that measures the microscopic molecular motion of water in order to investigate white matter microstructure. The modality has been used extensively in recent years to investigate the neuroanatomical basis of congenital brain malformations. We review the basic principles of diffusion imaging and of specific techniques, including diffusion tensor imaging (DTI) and high angular resolution diffusion imaging (HARDI). We show how DTI and HARDI, and their application to fiber tractography, has elucidated the aberrant connectivity underlying a number of congenital brain malformations. Finally, we discuss potential uses for diffusion imaging of developmental disorders in the clinical and research realms
What do we (need to) know about low-susceptibility of codling moth against Cydia pomonella granulovirus (CpGV)!
In 2005, the first codling moth (CM) populations with a reduced susceptibility to Cydia pomonella granulovirus
(CpGV) products have been observed. This phenomenon might be an indicator of an emerging resistance of
CM to CpGV. This paper summarizes some aspects of CM CpGV interaction and discusses potential
mechanisms in the host virus interaction, which could contribute to the observed low susceptibility. In order to
develop and implement successful resistance management strategies, much more knowledge about the
plasticity of CM CpGV interaction and the diversity of CM populations is essential
Slater screening constants in atomic and molecular orbitals
Slater screening constants in atomic and molecular orbital
Current-driven magnetization decrease in single crystalline ferromagnetic manganese oxide
The electrical and magnetic response to a bias current has been investigated
in a singlecrystalline ferromagnetic manganese oxide
CaMnO . A significant decrease of the magnetization is
observed at the same threshold current where a non-linearity of V-I
characteristics appears. Such a behavior cannot be understood in the framework
of the filamentary picture usually invoked for the non linearity of the other
manganese oxides. Instead, an analogy with spintronic features might be useful
and experimental signatures seem to be in agreement with excitations of spin
waves by an electric current. This provides an example of a bulk system in
which the spin polarized current induces a macroscopic change in the
magnetization.Comment: 3 pages, 4 figure
Local pressure-induced metallization of a semiconducting carbon nanotube in a crossed junction
The electronic and vibrational density of states of a semiconducting carbon
nanotube in a crossed junction was investigated by elastic and inelastic
scanning tunneling spectroscopy. The strong radial compression of the nanotube
at the junction induces local metallization spatially confined to a few nm. The
local electronic modifications are correlated with the observed changes in the
radial breathing and G-band phonon modes, which react very sensitively to local
mechanical deformation. In addition, the experiments reveal the crucial
contribution of the image charges to the contact potential at nanotube-metal
interfaces
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