The Unaided Single Frequency/Single Epoch Global Navigation Satellite System (SF/SE GNSS) model is the most challenging scenario for ambiguity resolution in the GNSS attitude determination application. To improve the performance of SF/SE-GNSS ambiguity resolution without excessive cost, the Micro-Electro-Mechanical System Inertial Measurement Unit (MEMS-IMU) is a proper choice for the auxiliary...

although candida albicans is the most common etiologic agent of candidiasis, c. dubliniensis, has been emerged, as another pathogen resembles c. albicans in many phenotypic aspects and noted for its in vitro potential for fluconazole resistance. since there was no evidence of any report about detection of this organism in iran, this study was designed to use of five different tests for identifi...

background due to a recent alarming increase in the number of hiv-hcv co-infected patients in romania. objectives a cross sectional study was conducted to assess the baseline predictors of liver disease evolution. patients and methods 83 hiv-hcv co-infected patients, untreated for hcv infection, were evaluated for viral replication, liver fibrosis (estimated by a noninvasive marker - fib4), and...

This paper describes a quaternion implementation of an Unscented Kalman Filter for attitude estimation on CubeSats using measurements of a sun vector, a magnetic field vector and angular velocity. For faster convergence of the attitude estimate, a SVD-method solving Wahba’s problem has been proposed, which provides an initial attitude estimate. Using unit quaternions provides a singularity free...

OBJECTIVE To examine the relationship of psychosocial stress and attitude toward illness to psychological adjustment among youth with chronic arthritis. METHODS Seventy-five youths with chronic arthritis aged 8-18 years were administered a semi-structured interview assessing illness-related and nonillness-related stressors in important life domains. Children also completed measures of attitud...

This paper addresses the attitude tracking of a rigid body using a quaternion description. Global finite-time attitude controllers are designed with three types of measurements, namely, full states, attitude plus constant-biased angular velocity, and attitude only. In all three scenarios hybrid control techniques are utilized to overcome the well-known topological constraint on the attitude man...

Two experiments were conducted to examine the impact on anonymity and accountability on the expression of group-mediated attitude-behaviour consistency. In Study 1, low and high identifiers (N = 106) were exposed to an attitude-congruent norm and provided information on intentions under anonymous and in-group accountable conditions. In Study 2, salience of identity was manipulated, participants...

This paper considers the problem of attitude synchronization for a group of flexible spacecraft based on distributed attitude cooperative control strategy. Based on the backstepping design, non-smooth control, and the neighbor-based design rule, a distributed attitude control law is constructed step by step. Under the proposed control law, it is shown that the attitude synchronization is achiev...

Attitude control law design for spacecraft large angle maneuvers is investigated in this paper. The feedback linearization technique is applied to the design of a nonlinear tracking control law. The output function to be tracked is the quaternion attitude parameter. The designed control law turns out to be a combination of attitude and attitude rate tracking command. The attitude-only output fu...

......................................................................................................... 5 PREFACE ............................................................................................................ 6 LIST OF ORIGINAL PUBLICATIONS ................................................................ 8 INTRODUCTION ...............................................................