The purpose of this paper is to attitude estimation of Nano-satellite which requires navigation sensors data to less cost function and effection movement of Nano-satellite focus of the research is to using data of navigation sensors and methods to achieve the requirement of the attitude estimation. in this paper the following attitude estimation of the according to direction of sun of the Nano-...

Accurate alignment and vertical channel instability play an important role in the strap-down inertial navigation system (SINS), especially in the case that precise navigation has to be achieved over long periods of time. Due to poor initialization as well as the cumulative errors of low-cost inertial measurement units (IMUs), initial alignment is not sufficient to achieve required navigation ac...

'Nothing like the human hand' [1] is the title of Boivin's 1968 article reviewing current research and development in prosthetic hands at that time. This title holds true even today although technological advances have allowed amputees access to componentry offering greater function, cosmesis and efficiency of control. Childress also reminds us that hand replacement by means of prosthetic inter...

<p style="text-align: justify;">Teacher knowledge is one of the main factors in quality mathematics learning. Many teachers have difficulty using proportional reasoning. Proportional reasoning essential aspects middle school curriculum to develop students' mathematical thinking. Teachers should realize that developing not an easy task. In this study, we investigated how give about concept...

In this paper we extend the principle of proportional representation to rankings. We consider the setting where alternatives need to be ranked based on approval preferences. In this setting, proportional representation requires that cohesive groups of voters are represented proportionally in each initial segment of the ranking. Proportional rankings are desirable in situations where initial seg...

This article proposes a method to diminish the pose (position plus attitude) drift experienced by an SVO (Semi-Direct Visual Odometry) based visual navigation system installed onboard UAV (Unmanned Air Vehicle) supplementing its estimation non linear optimizations with priors on outputs of GNSS (Global Navigation Satellite System) Denied inertial system. The is inspired in PI (Proportional Inte...