The current morphing technologies are mostly regarded as auxiliary tools, providing additional control torques to enhance the flight maneuverability of unmanned aerial vehicles (UAVs), and they cannot exist independently traditional surfaces. In this paper, we propose a tandem-wing micro vehicle (MAV) with multiple variable-sweep wings, which can reduce inertia forces moments weaken dynamic cou...

The allure of Citizen Kane has persisted through the changing of cinematic technique and style. Although full of technical innovation and revolutionary for its time, its unshakable position as the 'greatest movie of all time' cannot be attributed solely to the technical genius of Orson Welles. His use of special effects was inventive, and showed clear influence from Welles' experience as a magi...

Recent experimental success in the realization of two-dimensional (2D) magnetism has stimulated search for new magnetic 2D materials with strong anisotropy and high Curie temperature. One promising subgroup systems are Dirac half-metals (DHM) which have gained a lot interest recently, as they host high-temperature quantum anomalous Hall effect (QAHE). This article discusses predictions intrinsi...

The space target capturing task using the spacecraft-manipulator system (SMS) has special significance in on-orbit servicing due to its theoretical challenges and practical value. contact force between end effector (gripper) exerted by tumbling motion of destabilizes spacecraft base. A full-dimensional controllable damping mechanism (FDCDM) with a cross-axis structure was designed buffer transi...

Compliant capture of the space non-cooperative targets is a key technology in on-orbit services. A great challenge that multi-dimensional contact force generated by tumbling target can destabilize spacecraft-manipulator system (SMS), which may eventually cause failure task. full-dimensional controllable damping mechanism (FDCDM) with gyroscopic structure introduced into joint SMS to buffer forc...

Cover illustrations: TOP LEFT: Ordered lubricants confined to nanoscale gap (Peter Cummings). BOTTOM LEFT: Hypothetical spintronic quantum computer (Sankar Das Sarma and Bruce Kane). TOP RIGHT: Folded spectrum method for free-standing quantum dot (Alex Zunger). MIDDLE RIGHT: Equilibrium structures of bare and chemically modified gold nanowires (Uzi Landman).

Captured Diversity in a Culture Collection: Case Study of the Geographic and Habitat Distributions of Environmental Isolates Held at the American Type Culture Collection Melissa Merrill Floyd, Jane Tang, Matthew Kane, and David Emerson* Bacteriology Program, American Type Culture Collection, Manassas, Virginia; Environmental Science and Policy Program, George Mason University, Manassas, Virgini...

Nursing homes are complex environments with large numbers of features that may impact resident quality of life. Multivariate analysis of the effects of individual features is difficult because many features are potentially confounded with one another. We used cluster Howard B. Degenholtz, PhD (E-mail: [email protected]), is Associate Professor, Health Policy & Management, Graduate School of Public...

A novel model-based controller for 6 degree-of-freedom (DOF) hydraulic driven parallel manipulator considering the nonlinear characteristic of hydraulic systems-proportional plus derivative with dynamic gravity compensation controller is presented, in order to improve control performance and eliminate steady state errors. In this paper, 6-DOF parallel manipulator is described as multi-rigid-bod...