scholarly journals A Direct Attitude Determination Approach Based on GPS Double-Difference Carrier Phase Measurements

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Jianhua Cheng ◽  
Jing Wang ◽  
Lin Zhao
Keyword(s):  
Carrier Phase ◽  
Attitude Determination ◽  
Double Difference ◽  
Body Frame ◽  
Phase Equation ◽  
New Approach ◽  
Solution Approach ◽  
Relationship Of ◽  
The Relationship ◽  
Attitude Matrix

The principle of the traditional attitude solution approach based on GPS (Global Position System) is to get the attitude matrix according to the relationship of coordinates. During the progress, the error of baseline position assumed in ECEF (Earth-Centered Earth-Fixed) and the error of coordinate transform between body frame and reference frame (ENU, East-North-Up) have been included in the result, and finally the precision of attitude determination is reduced. This contribution presents a new approach of attitude determination, in which the attitude angles are calculated by the double-difference carrier phase equation of GPS according to the relationship of attitude matrix and attitude angles through least-squares estimate method. The new approach predigests the procedure of attitude determination which reduces the error assumed. According to the analysis the precision of attitude determination is higher than that of traditional method. It is shown it gets a precise attitude result with the direct attitude determination method in the simulation. A novel algorithm is proposed to solve some problems. Simulation results show the effectiveness of the proposed algorithm.

Colonialism and the Highland Clearances

2017 ◽  
Vol 8 (1) ◽  
pp. 22-48 ◽  
Author(s):  
Iain Mackinnon
Keyword(s):  
Industrial Development ◽  
Comparative Approach ◽  
Indigenous Research ◽  
Internal Colonialism ◽  
New Approach ◽  
A Site ◽  
Relationship Of ◽  
The Relationship ◽  
Imperial State ◽  
Late Modern

This article employs a new approach to studying internal colonialism in northern Scotland during the 18th and 19th centuries. A common approach to examining internal colonial situations within modern state territories is to compare characteristics of the internal colonial situation with attested attributes of external colonial relations. Although this article does not reject the comparative approach, it seeks to avoid criticisms that this approach can be misleading by demonstrating that promoters and managers of projects involving land use change, territorial dispossession and industrial development in the late modern Gàidhealtachd consistently conceived of their work as projects of colonization. It further argues that the new social, cultural and political structures these projects imposed on the area's indigenous population correspond to those found in other colonial situations, and that racist and racialist attitudes towards Gaels of the time are typical of those in colonial situations during the period. The article concludes that the late modern Gàidhealtachd has been a site of internal colonization where the relationship of domination between colonizer and colonized is complex, longstanding and occurring within the imperial state. In doing so it demonstrates that the history and present of the Gaels of Scotland belongs within the ambit of an emerging indigenous research paradigm.

Understanding Statistics Cognition

2017 ◽  
pp. 10-56
Keyword(s):  
Cognitive Processes ◽  
New Approach ◽  
Relationship Of ◽  
The Relationship

This chapter focuses on understanding the use of and relationship among the features of statistics cognition: literacy, reasoning, and thinking. We argue that research on statistics cognition is fragmented, which is problematic for understanding how these constructs can be unified to support education. We then review methods of quantifying cognitions, involving studies which have attempted to categorize and parse cognitive processes. This information is then used to synthesize a new approach to understanding statistics cognition, proposing a model which makes specific predictions about the relationship of these features. The model and definitions of cognitions presented in this chapter are used as a basis of discussion cognition throughout the remainder of the book.

Developing a Multisemester Interwoven Dynamic Systems Project to Foster Learning and Retention of STEM Material

2004 ◽  
Author(s):  
Peter Avitabile ◽  
Stephen Pennell ◽  
John White
Keyword(s):  
Dynamic Systems ◽  
Basic Material ◽  
Mathematical Methods ◽  
Introductory Courses ◽  
New Approach ◽  
Science Technology ◽  
Educational Career ◽  
And Mathematics ◽  
Relationship Of ◽  
The Relationship

Students generally do not understand how basic STEM (Science, Technology, Engineering and Mathematics) material fits into all of their engineering courses. Basic material is presented in introductory courses but the relationship of the material to subsequent courses is unclear to the student since the practical relevance of the material is not necessarily presented. Students generally hit the “reset button” after each course not realizing the importance of basic STEM material. The capstone experience is supposed to “tie all the pieces together” but this occurs too late in the student’s educational career. A new multisemester interwoven dynamic systems project has been initiated to better integrate the material from differential equations, mathematical methods, laboratory measurements and dynamic systems across several semesters/courses so that the students can better understand the relationship of basic STEM material to an ongoing problem. This paper highlights the overall concept to be addressed by the new approach. The description of the project and modules under development are discussed.

scholarly journals Polyharmonic signals and their properties

2020 ◽  
Vol 2020 (3) ◽  
pp. 37-50
Author(s):  
Evgeniy Butyrskiy ◽  
Vitaliy Rahuba
Keyword(s):  
Hyperbolic Function ◽  
New Approach ◽  
Active Location ◽  
Signal Synthesis ◽  
Pros And Cons ◽  
Relationship Of ◽  
The Relationship ◽  
Prospects Of Application

This article proposes a new approach to signal synthesis to ensure the stealth and safety of active location tools, which improves the efficiency of lighting. The work has been classified complex broadband signals, considered the class of polyharmonic and band signals, their pros and cons, the prospects of application in the systems of location, shows the relationship of their signals with hyperbolic function and generalized range Fibonacci.

scholarly journals Rastafari: towards a new approach

1990 ◽  
Vol 64 (3-4) ◽  
pp. 127-148 ◽  
Author(s):  
Barry Chevannes
Keyword(s):  
Social Structure ◽  
Structure Type ◽  
Cultural Continuity ◽  
New Approach ◽  
Relationship Of ◽  
The Relationship

Author looks at the Rastafari movement not as a purely social structure type of perspective and tries to see it in the context of cultural continuity. He examines the relationship of Rastafari to Revivalism and looks at the structure of the movement itself.

A New Approach to Assess the Changing Growth Model of Open National Innovation Systems

2015 ◽  
Vol 7 (3) ◽  
pp. 183-198 ◽  
Author(s):  
Shu-Hao Chang ◽  
Carey Ming-Li Chen
Keyword(s):  
Open Innovation ◽  
Innovation Systems ◽  
Latent Growth ◽  
National Innovation Systems ◽  
New Approach ◽  
International Linkages ◽  
Innovation Model ◽  
Effective Policy ◽  
Relationship Of ◽  
The Relationship

The open innovation paradigm is an important topic of management thought in national innovation systems. Previous studies of open national innovation systems have almost always focused on concepts or theoretical exploration. There is a great lack of integrated frameworks for the process and mechanism of open national innovation systems. Therefore, the research adopts a structural approach and provides an open national innovation model to verify the influence of different mechanisms on open innovation outputs. As well, we argue that open national innovation systems will change over time, as the mechanisms are dynamic, linking, and coexistent. The study adopts a latent growth curve model to verify the growth tendency and progressive change. The policymaker’s perspective of exploring open national innovation systems is important. Building open national innovation capabilities is based on cumulativeness conditions, diffusion capabilities, and international linkages. The results show that cumulativeness conditions and international linkages will positively affect the growth rate of open innovation outputs. Consequently, this study adopts a dynamic experimental map to validate the relationship of the dimensions to provide government with some practical suggestions for making effective policy.

scholarly journals On the Nature and Origin of the T Tauri Stars

1957 ◽  
Vol 3 ◽  
pp. 3-10 ◽  
Author(s):  
George H. Herbig
Keyword(s):  
Emission Line ◽  
T Tauri Stars ◽  
New Approach ◽  
T Tauri ◽  
Astrophysical Journal ◽  
Relationship Of ◽  
The Relationship ◽  
Material Form

It is fitting that, in opening this Symposium with a consideration of the T Tauri stars, we note that this month marks the tenth anniversary of the September 1945 issue of the Astrophysical Journal, in which appeared the remarkable pioneering paper by Alfred H. Joy that initiated the study of emission-line stars associated with nebulosity. This contribution opened a new approach to the study of the relationship of stars to their environment. Today, ten years later, the T Tauri stars and their interaction with nebular material form a topic whose significance we may not fully appreciate and whose opportunities have been as yet only superficially exploited.

The criminal statistics of nineteenth-century cities: a new approach

Urban History ◽  
1986 ◽  
Vol 13 ◽  
pp. 28-36 ◽  
Author(s):  
R. S. Sindall
Keyword(s):  
Nineteenth Century ◽  
Middle Class ◽  
Tax Evasion ◽  
Lower Class ◽  
Social Scientists ◽  
Main Interest ◽  
New Approach ◽  
Relationship Of ◽  
The Relationship ◽  
Criminal Statistics

In the last decade an area of urban history receiving increasing attention has been that of crime and, in particular, nineteenth-century crime. For those social scientists whose main interest is the study of lower-class life the study of crime has become increasingly fashionable. However, the study of crime is the study of the whole of society and the relationship of the various classes within that society. That law-makers create law-breakers is axiomatic and the study of crime is, therefore, not just the study of criminals but also of the institutions which defined them as criminals. For too long it has been implied that studying criminals is the study of a subset of lower-class life. This is a reflection of the fact that research is largely a middle-class occupation and so researchers bring to their work their own middle-class perception of society. The result is the automatic acceptance that crime consists purely of larceny, burglary, assault, rape and murder while overlooking the middle-class crimes of fraud, embezzlement, tax evasion, offences against the Companies Acts, Consumer Protection Acts and Factory Acts.

Differential relationship of kinematic model and speed control strategies for a computer-controlled robot manipulator

Robotica ◽  
1986 ◽  
Vol 4 (3) ◽  
pp. 155-162 ◽  
Author(s):  
C. Y. Ho ◽  
Sriwattanathamma Jen
Keyword(s):  
Robot Manipulator ◽  
Control Strategies ◽  
Kinematic Model ◽  
Speed Control ◽  
New Approach ◽  
Manipulator Link ◽  
Moving Coordinate ◽  
Relationship Of ◽  
The Relationship ◽  
Differential Relationship

SummaryThis paper describes a new approach to obtaining a differential relationship of a robot manipulator via the Theoretical Kinematics method which may expedite computational efforts. The method involves a successive transformation of velocities from the end-effector to the base of the manipulator, link by link, using the relationship of moving coordinate systems. The equations obtained are written in the form suitable for programming on a digital computer. Furthermore, this paper also discusses the speed control model for general robot manipulators and together presents the Inverse Jacobian of cases of underdetermined and overdetermined of joint-controlled variables.

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