The positioning tolerances for phase plates used to compensate human eye aberrations are analyzed. Lateral displacements, in-plane rotations, and axial translations are considered, describing analytic and numerical procedures to compute the maximum degree of compensation achievable in each case. The compensation loss is found to be dependent both on the kind and the amount of misalignment and o...

This thesis presents an optical positioning system for the NanoWalker robot. The system is based on a lateral effect photo-diode sensor. The thesis compares various methods of positioning and provides a rationale for selecting the lateral effect photo-diode. It then proceeds with a selection of components for the positioning system. The system is shown capable of resolutions on the order of 5 m...

The impacts and disadvantages of transhipment which even threatens sustainable development shows that can be identified as a transnational crime. On the one side, there is need for legal countermeasures transshipment crimes in Indonesia so it does not occur again. But on other actually becomes necessity because fish landing mostly take time are fresh. In addition, also has some obstacles no age...

High-precision positioning scheme, an important part of the indoor navigation system, can be implemented using an ultra-wide band (UWB) based ranging system. Recently, solutions for precise positioning in dense multi-path and nonline-of-sight (NLOS) conditions have attracted a lot of attention in literature. On the other hand, it is expected that Waveform Division Multiple Access (WDMA) technol...

We present the Rainbow Code, a state-of-the-art genetic algorithm (GA) representation that encodes layered trees or bipartite trees (spanning trees of a pre-specified complete layered graph or complete bipartite graph) as integer strings of a certain form. The Rainbow Code possesses perfect feasibility, full coverage and zero bias, because the correspondence it defines between trees and strings...

OBJECTIVE To obtain anatomical data on intertubercular sulcus of humerus, evaluate the correlation between intertubercular sulcus and retroversion angle of humeral head, to guide the positioning of torsion angle of prosthesis during total shoulder arthroplasty and provide references for shoulder prosthesis design. METHODS Using a Siemens Ultrahigh speed 64- rows multi-slices spiral CT scanner...

OBJECTIVE The lateral jack-knife position is often used during transpsoas surgery to improve access to the spine. Postoperative neurological signs and symptoms are very common after such procedures, and the mechanism is not adequately understood. The objective of this study is to assess if the lateral jack-knife position alone can cause neurapraxia. This study compares neurological status at ba...

The study and use of multi-robot teams has become more prevalent within academia and industry as the capability and autonomy of these systems continues to improve (Arai, Pagello, and Parker 2002). With high levels of progress already made concerning the control of individual robots, the acknowledged advantages of multi-robot systems (MRS) has resulted in considerable research attention in the l...

Introduction: The accuracy of patient positioning plays an important role for radiotherapy tasks. Short and automated Quality Assurance (QA) programs are becoming one of the challenging tasks in Radiotherapy. The current study, investigates the accuracy of treatment couch positioning with four degrees of freedom (4DoF) using a fast and accurate method based on an image acquired...