The phonon dynamics of the Sn/Ge(111) interface is studied using high-resolution helium atom scattering and first-principles calculations. At room temperature we observe a phonon softening at the Kmacr; point in the (sqrt[3]xsqrt[3])R30 degrees phase, associated with the stabilization of a (3x3) phase at low temperature. That phonon band is split into three branches in the (3x3) phase. We analy...

This paper studies the effect of regional spillovers on the rate of finn formation in two major West Gennan industries for the time period from 1989 to 1993. I exploit regional variations in finn fonnation at the county level to identify the effects of historically given industry structure and employment structure on the emergence of new firms. The results are consistent with the existence of l...

We study the impact of internal decision-making structures on the stability of collusive agreements. To this end, we use a three-firm spatial competition model where two firms belong to the same holding company. The holding company can decide to set prices itself or to delegate this decision to its local units. If collusion breaks down, the holding company may relocate its two local units. It t...

Submonolayer quantities of Mn are deposited on wurtzite GaN 0001̄ . The surface is monitored using reflection high energy electron diffraction, which shows a pattern consisting of 3 reconstruction along 101̄0 , but only 1 along 112̄0 . Diffraction analysis shows that the 3 streak intensity is maximized at 0.86 monolayer of Mn deposition. The results indicate that Mn forms linear chains along the 1...

We measure the adsorption height of hydrogen-intercalated quasifreestanding monolayer graphene on the (0001) face of 6H silicon carbide by the normal incidence x-ray standing wave technique. A density functional calculation for the full (6√3×6√3)-R30° unit cell, based on a van der Waals corrected exchange correlation functional, finds a purely physisorptive adsorption height in excellent agreem...

X-ray standing waves ~XSW! are used to measure the structure of the ()3))R30° to (333) lowtemperature phase transition for the 1 3 monolayer Sn/Ge~111! surface. A three-dimensional direct-space imaging approach, based on the summation of several hkl XSW-measured Fourier coefficients, is demonstrated. At room temperature, the Sn atoms are found to occupy the T4-adsorption sites with one-third of...

We report a computational study of conformations and charge transport characteristics of biphenyldithiol (BPDT) monolayers in the (sqrt.3 x sqrt.3)R30 degrees packing ratio sandwiched between Au(111) electrodes. From force-field molecular-dynamics and annealing simulations of BPDT self-assembled monolayers (SAMs) with up to 100 molecules on a Au(111) substrate, we identify an energetically favo...

OBJECTIVE To investigate whether performing a low-intensity, single-joint exercises for knee extensors was an efficient strategy for increasing the number of motor units recruited in the vastus lateralis muscle during a subsequent multi-joint exercises. METHODS Nine healthy male participants (23.33+/-3.46 yrs) underwent bouts of exercise in which knee extension and 45 degrees , and leg press ...