Many compactifications of higher–dimensional supersymmetric theories have approximate vacuum degeneracy. The associated moduli fields are stabilized by non–perturbative effects which break supersymmetry. We show that at finite temperature the effective potential of the dilaton acquires a negative linear term. This destabilizes all moduli fields at sufficiently high temperature. We compute the c...

The need for advanced materials capability has never been as great as at this time in our nation's history. Energy shortages demand more efficient operation of existing equipment of all types as well as new and imaginative methods of power conversion. Advanced materials are the key to achieving improved performance via higher cycle operating temperatures, lighter structural components, and adeq...

The direct replacement of aromatic fluorine in hexafluorobenzene has hitherto been possible only by the use of nucleophilic reagents. In this investigation, the replacement of nuclear fluorine by nonnucleophilic, or weakly nucleophilic, reagents was achieved by reaction at relatively high temperatures, 300 to 850 °C. For example, the reaction of hexafluorobenzene with such reagents as bromine, ...

A novel liquid chromatographic system which enables high temperature ultrafast liquid chromatography (HTU-FLC) has been designed through the careful consideration of heat transfer, band broadening, and pressure drop. Studies of the effect of linear velocity on the HETP show that column efficiency at high velocity, especially of well-retained solutes, dramatically improves at higher temperatures...

The effect of violent media on aggression has always been highly concerned by the public. The effect of violent video game has been studied by researchers for many years, while how the interaction (competition and cooperation) work during video game play is still little known. In present study, the effect of non-violent video games on aggression was tested by experimental design. Participants w...

The principal and school leadership team have established and are driving a strong, positive learning culture, grounded in evidence from research and practice. Explicit and clear school-wide expectations have been established with families, teachers, and students. Strong procedures are in place to encourage a school-wide, shared responsibility for student management, and to encourage the develo...

Closed edges bilayer graphene (CEBG) is a recent discovered novel form of graphene structures, whose regulated edge states may critically change the overall electronic behaviors. If stacked properly with the AB style, the bilayer graphene with closed zigzag edges may even present amazing electronic properties of bandgap opening and charge separation. Experimentally, the CEBG has been confirmed ...