The normal positioning error hinders the use of magnetorheological finishing (MRF) in robotic polishing. In this paper, influence on MRF removal rate is revealed, and a force-controlled end-effector for process presented. developed integrated into six-axis industrial robot, robot positions while realizes constant force control. A fused silicon mirror polished, result shows that proposed device ...

We present the first single-molecule atomic force microscopy study on the effect of chemical denaturants on the mechanical folding/unfolding kinetics of a small protein GB1 (the B1 immunoglobulin-binding domain of protein G from Streptococcus). Upon increasing the concentration of the chemical denaturant guanidinium chloride (GdmCl), we observed a systematic decrease in the mechanical stability...

We present the spherical harmonic equation for the gravitational potential inside the Earth. The equation satisfies Poisson's equation and converges uniformly. It obviates the need for downward continuation of the exterior potential with its attendant convergence difficulties but of course requires some knowledge of the Earth's density distribution. Equipped with the equation, we derive the gen...

Abstract: We consider the coupling of quintessence to observable matter in supergravity and study the dynamics of both supersymmetry breaking and quintessence in this context. We investigate how the quintessence potential is modified by supersymmetry breaking and analyse the structure of the soft supersymmetry breaking terms. We pay attention to their dependence on the quintessence field and to...

Under constant applied force, the separation of double-stranded DNA into two single strands is known to proceed through a series of pauses and jumps. Given experimental traces of constant-force unzipping, we present a method whereby the locations of pause points can be extracted in the form of a pause point spectrum. A simple theoretical model of DNA constant-force unzipping is presented, which...

Junghoon Jahng,1 Bongsu Kim,2 Eun Seong Lee,3 and Eric Olaf Potma2 1Department of Physics and Astronomy, University of California, Irvine, California 92697, USA 2Department of Chemistry, University of California, Irvine, California 92697, USA 3Center for Nanometrology, Korea Research Institute of Standards and Science, Daejeon 304-340, South Korea (Received 18 July 2016; revised manuscript rece...

Single molecule studies, at constant force, of the separation of double-stranded DNA into two separated single strands may provide information relevant to the dynamics of DNA replication. At constant applied force, theory predicts that the unzipped length as a function of time is characterized by jumps during which the strands separate rapidly, followed by long pauses where the number of separa...