The Linac Coherent Light Source (LCLS) is a SASE xray Free-Electron Laser (FEL) based on the final kilometer of the Stanford Linear Accelerator. The tight tolerances for positioning the electron beam close to the undulator axis calls for the introduction of Beam Finder Wire (BFW) device. A BFW device close to the upstream end of the undulator segment and a quadrupole close to the down stream en...

In this paper, a transparency-optimized feedback controller with robustness is designed for multi-axis haptic device, where a disturbance observer is employed to decouple the coupling e ect existing in multiaxis haptic device. A performance index for the transparency is de ned in a viewpoint of admittance matching, and the optimal solution minimizing the performance index is obtained by solving...

The paper deals with the design and optimization of a novel magnetic switchable device based on Halbach array. The magnetic field in air gap is adjustable by rotating the center axis of adhesion mechanism so that the magnetic adhesion force is variable, and it is convenient for device to adsorb on and detach from the ferromagnetic workpiece or surface. The magnetic field model is established by...

The Kinect sensor was introduced in November 2010 by Microsoft for the Xbox 360 video game system. The sensor unit is connected to a base with a motorized pivot. It was designed to be positioned above or below a video display and to track player body and hand movements in 3D space, which allows users to interact with the Xbox 360. The device contains a RGB camera, depth sensor, IR light source,...

In this article an in-air signature biometric technique is proposed. Users would authenticate themselves by performing a 3-D gesture invented by them holding a mobile device embedding an accelerometer. All the operations involved in the process are carried out inside the mobile device, so no additional devices or connections are needed to accomplish this task. In the article, 34 different users...

Real-time health care monitoring may enable prediction and prevention of disease or improve treatment by diagnosing illnesses in the early stages. Wearable, comfortable, sensing devices are required to allow continuous monitoring of a person's health; other important considerations for this technology are device flexibility, low-cost components and processing, and multifunctionality. To address...

background: intrauterine device (iud) is an effective and long term method of contraception that can be used without continued effort by the user to prevent pregnancy perfectly. pain during iud insertion is one of the obstacles to properly using the device. thus, using different methods of analgesia and anesthesia to alleviate this pain has been studied by many researchers. this review article ...