In this paper, a quaternion-based finite-time sliding mode attitude controller is designed for a spacecraft performing high-thrust orbital maneuvers, with cold gas thrusters as its actuators. The proposed controller results are compared with those of a quaternion feedback controller developed for the linearized spacecraft dynamics, in terms of settling time, steady-state error, number of thrust...

Abstract By reviewing economic performance, two main phenomena could be identified: The first phenomenon is prior to the third wave of the Industrial Revolution in which limited resources are the predominant input; in other words, physical and natural resources are much more credited than human resources. The second phenomenon resonates with the third wave of industrial revolution to the presen...

Manual fingerprint classification algorithms are very time consuming, and usually not accurate. Fast and accurate fingerprint classification is essential to each AFIS (Automatic Fingerprint Identification System). This paper investigates a fingerprint classification algorithm that reduces the complexity and costs associated with the fingerprint identification procedure. A new structural algorit...

the network design problem (ndp) is one of the important problems in combinatorial optimization. among the network design problems, the multicommodity capacitated network design (mcnd) problem has numerous applications in transportation, logistics, telecommunication, and production systems. the mcnd problems with splittable flow variables are np-hard, which means they require exponential time t...

This study is about outlier detection in time series data. The main objective is to derive and to test statistics for detecting additive outlier (AO) and innovative outlier (IO) in GARCH(1,1) processes and subsequently to develop a procedure for testing the presence of outliers using the statistics. A test statistic has been derived for each type of outlier. In the derivation of the statistics,...

We describe a system, Prompt, used to design physical systems. Prompt employs a multi-level approach to design. When simple constraint propagation over prototypes [Adda fails, Prompt can significantly modify prototypes by reasoning about their structure and physics. Prompt derives the behavior of a prototype from its structure using knowledge of physics stored in a Graph of Models. It then uses...

Through their planning processes, Bedfordshire CCG (BCCG) recognised the need to both change the services they commission and the way they commission services. They decided to take a whole systems approach to redesigning their Musculoskeletal care (MSK) service, which at the time represented the fourth highest area of spend but delivered a fragmented, variable and inequitable service for patients.

Web2 and the evolving vision of Web3 have a great effect on facilitation of information sharing, information aggregation, interoperability, user-centered design, collaboration on the World Wide Web, and crowd-centered services. New concept of Web is the intuition that drives crowdsourcing, crowd servicing, and crowd computing. With crowdsourcing emergence people get motivated to work through in...

Today’s nurse managers (NMs) are challenged to be visionary and innovative leaders who embrace change, manage diverse groups of employees, and address the complex demands of patients and families. Nurse managers need to be educated and knowledgeable on health care reform including the Patient Protection and Affordable Care Act, oversee multimillion dollar budgets, leverage technology, and champ...