Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

2006

Control

Discipline
Institution
Publication
Publication Type

Articles 1 - 30 of 37

Full-Text Articles in Entire DC Network

The Importance Of Scenarios In Evaluating The Socio-Ethical Implications Of Location-Based Services, L. Perusco, Katina Michael Dec 2006

The Importance Of Scenarios In Evaluating The Socio-Ethical Implications Of Location-Based Services, L. Perusco, Katina Michael

Faculty of Informatics - Papers (Archive)

Location-based services (LBS) are those applications that utilize the position of an end-user, animal or thing based on a given device (handheld, wearable, interwoven into fabric or implanted), executed for a particular purpose. LBS applications range from those that are mission-critical to those that are used for convenience, from those that are mandatory to those that are voluntary, from those that are targeted at the mass market to those that cater for the needs of a niche market. Location services can be implemented using a variety of access mediums including global positioning systems and radio-frequency identification, rendering approximate or precise …

Go to article

T-6a Texan Ii In-Flight Simulation And Variable Stability System Design, Kenneth Paul Germann Dec 2006

T-6a Texan Ii In-Flight Simulation And Variable Stability System Design, Kenneth Paul Germann

Theses and Dissertations

Inlight variable stability aircraft and inlight simulation are described. The uses of these vehicles and the associated requirements are described. Several forms of control architecture are identified for use in a T-6A inlight simulator. A non-linear model of the T-6A Texan II is developed for use in MATLAB/SIMULINK®. This model is used to design a feedforward responseeedback controller, based on simplified dynamic inversion. This controller is shown to exercise precise control over the T-6A host aircraft dynamics. This architecture is then used to demonstrate simulation of the A-4 and the F-15 by the T-6A. In addition to proving simplified dynamic …

Go to article

Internal Combustion Engine Cooling Strategies: Theory And Test, John Chastain Dec 2006

Internal Combustion Engine Cooling Strategies: Theory And Test, John Chastain

All Theses

Advanced internal combustion engine thermal management systems can enhance overall engine performance through the use of computer controlled cooling system actuators. Existing ground vehicle cooling systems generally have performance limitations due to the fixed behavior of the wax-based thermostat valve and crankshaft dependent operation of the coolant pump and radiator fan. Upgrading the traditional thermostat valve, water pump, and radiator fan with actuators permit real time computer control for improved temperature tracking and reduced power consumption. In this paper, the benefits associated with advanced automotive cooling systems are experimentally investigated. A 4.6L engine with a real-time data acquisition and control …

Go to article

Anxiety And Control In African American Families., L. Kevin Chapman Dec 2006

Anxiety And Control In African American Families., L. Kevin Chapman

Electronic Theses and Dissertations

To investigate the effects of anxiety and ethnicity on parental control as well as the effects ethnicity, anxiety, and parental control have on child diagnostic severity, anxious African American and Caucasian families were compared. Sixty-nine parent-child dyads completed the study. Forty-two mothers in the sample suffered from an anxiety disorder whereas twenty-seven mothers did not meet criteria for any current or past psychopathology. Parent-child dyads were videotaped as they completed two mildly stressful tasks together. Parental and child behaviors during the interactions were coded to obtain an objective measure of parents' behavior. Data were reduced to produce four behavioral composites …

Go to article

Active Minimization Of Acoustic Energy Density To Attenuate Radiated Noise From A Diesel Generator, Andrew J. Boone Nov 2006

Active Minimization Of Acoustic Energy Density To Attenuate Radiated Noise From A Diesel Generator, Andrew J. Boone

Theses and Dissertations

The focus of this thesis was to use active noise control (ANC) to globally minimize the tonal and broadband noise radiating from a diesel generator enclosure. The major goal of this research was to show that minimizing the noise within the enclosure can lead to an overall sound pressure level (SPL) reduction of radiated noise. The target levels for overall SPL reduction were at least 2 dBA. The control algorithms used in this research were based on a filtered-x LMS adaptive algorithm, which minimizes energy density (ED). Both feedforward and feedback control approaches were investigated. The noise spectrum produced by …

Go to article

Robust Control Techniques Enabling Duty Cycle Experiments Utilizing A 6-Dof Crewstation Motion Base, A Full Scale Combat Hybrid Electric Power System, And Long Distance Internet Communications, Marc Compere, Jarrett Goodell, Miguel Simon, Wilford Smith, Mark Brudnak Nov 2006

Robust Control Techniques Enabling Duty Cycle Experiments Utilizing A 6-Dof Crewstation Motion Base, A Full Scale Combat Hybrid Electric Power System, And Long Distance Internet Communications, Marc Compere, Jarrett Goodell, Miguel Simon, Wilford Smith, Mark Brudnak

Publications

The RemoteLink effort supports the U.S. Army's objective for developing and fielding next generation hybrid-electric combat vehicles. It is a distributed soldierin- the-Ioop and hardware-in-the-Ioop environment with a 6-DOF motion base for operator realism, a full-scale combat hybrid electric power system, and an operational context provided by OneSAF. The driver/gunner crewstations rest on one of two 6-DOF motion bases at the U.S. Army TARDEC Simulation Laboratory (TSL). The hybrid power system is located 2,450 miles away at the TARDEC Power and Energy System Integration Laboratory (P&E SIL). The primary technical challenge in the RemoteLink is to operate both laboratories together …

Go to article

Decision-Making About Volitional Impairment In Sexually Violent Predators, Cynthia Calkins Mercado, Brian H. Bornstein, Robert F. Schopp Sep 2006

Decision-Making About Volitional Impairment In Sexually Violent Predators, Cynthia Calkins Mercado, Brian H. Bornstein, Robert F. Schopp

Department of Psychology: Faculty Publications

The Kansas v. Hendricks (1997) decision, in which the Supreme Court authorized post-sentence civil commitment for certain sex offenders, appeared to be constitutionally legitimized by limiting the class of offenders eligible for this special form of civil commitment to those who are “unable to control” their dangerousness. Nowhere in the available record, however, did the Court elucidate what they meant by this notion of volitional impairment. This study sought to examine factors that legal professionals (n = 43), psychologists (n = 40), and mock jurors (n = 76) deem most relevant to a determination of sex offender volitional impairment. Participants, …

Go to article

Adaptive Control Of Micro Air Vehicles, Joshua Stephen Matthews Aug 2006

Adaptive Control Of Micro Air Vehicles, Joshua Stephen Matthews

Theses and Dissertations

Although PID controllers work well on Miniature Air Vehicles (MAVs), they require tuning for each MAV. Also, they quickly lose performance in the presence of actuator failures or changes in the MAV dynamics. Adaptive control algorithms that self tune to each MAV and compensate for changes in the MAV during flight are explored. However, because the autopilots on MAVs are small, many of the adaptive control algorithms like those that employ least squares estimation may take too much code space, memory, and/or computing power. In this thesis we develop several Lyapunov-based model reference adaptive control (MRAC) schemes that are both …

Go to article

"Mother May I? Food, Power And Control In Mothers And Daughters", Lisa Joy Borello Aug 2006

"Mother May I? Food, Power And Control In Mothers And Daughters", Lisa Joy Borello

Women's, Gender, and Sexuality Studies Theses

Fourteen women in the United States were interviewed to determine the role mothers played in shaping their daughters’ attitudes toward their bodies and eating, and the extent to which women negotiated the messages they received from their family and larger culture concerning weight and appearance. Results of this study complicated existing theories concerning the factors that most influence women’s self-esteem and body image. The results demonstrated that the women within this sample engaged in a variety of disordered eating patterns, but did not recognize their own actions as out-of-the-ordinary; rather they re-produced familial and cultural messages about women’s “normative body …

Go to article

Preliminary Modeling, Control, And Trajectory Design For Miniature Autonomous Tailsitters, Nathan B. Knoebel, Stephen R. Osborne, Deryl Snyder, Timothy W. Mclain, Randal W. Beard, Andrew Mark Eldredge Aug 2006

Preliminary Modeling, Control, And Trajectory Design For Miniature Autonomous Tailsitters, Nathan B. Knoebel, Stephen R. Osborne, Deryl Snyder, Timothy W. Mclain, Randal W. Beard, Andrew Mark Eldredge

Faculty Publications

A tailsitter UAV has unique advantages over typical fixed wing aircraft or hovercraft. This paper highlights topics of interest in our preliminary research in developing a tailsitter UAV. An aerodynamic model and quaternion-based attitude and position control scheme is presented for controlling a tailsitter through hover maneuvers, with simulation results. Desired trajectories are also developed through feedback linearization of the dynamic equations, intended for quaternion-based attitude control. Finally, a hardware platform is proposed.

Go to article

Soap Box: If Katina Michael Could Send A Message To Government, It Would Be This..., K. Michael Jun 2006

Soap Box: If Katina Michael Could Send A Message To Government, It Would Be This..., K. Michael

Professor Katina Michael

No abstract provided.

Go to article

The Emerging Ethics Of Humancentric Gps Tracking And Monitoring, Katina Michael, Andrew Mcnamee, M G. Michael Jun 2006

The Emerging Ethics Of Humancentric Gps Tracking And Monitoring, Katina Michael, Andrew Mcnamee, M G. Michael

Faculty of Informatics - Papers (Archive)

The Global Positioning System (GPS) is increasingly being adopted by private and public enterprise to track and monitor humans for location-based services (LBS). Some of these applications include personal locators for children, the elderly or those suffering from Alzheimer’s or memory loss, and the monitoring of parolees for law enforcement, security or personal protection purposes. The continual miniaturization of the GPS chipset means that receivers can take the form of wristwatches, mini mobiles and bracelets, with the ability to pinpoint the longitude and latitude of a subject 24/7/365. This paper employs usability context analyses to draw out the emerging ethical …

Go to article

A Comparison Between The West & The East In State Supervised Control Through The Power Of Eminent Domain, Eman Mga Eshmawy Jun 2006

A Comparison Between The West & The East In State Supervised Control Through The Power Of Eminent Domain, Eman Mga Eshmawy

Archived Theses and Dissertations

Eminent domain is a problem that effects both the West and the East. This thesis focuses on blighted homes that are confiscated by government and later used for private if not corporate reasons rather than for public use intentions. The comparison is between the United States and Egypt, and three neighborhoods are discussed from each country separately. The comparison is between two quantitative analyses' between the United States and Egypt showing that this type of eradication of property allows for the authority and power of government to be used negatively towards society. The surveys were collected during approximately a two …

Go to article

The Might Of Mont Blanc, R. Ryan Brandys May 2006

The Might Of Mont Blanc, R. Ryan Brandys

The Prairie Light Review

No abstract provided.

Go to article

Fire Management Guidelines For Southern Shrubland And Pilbara Pastoral Rangelands : Best Management Practice Guidelines, Department Of Agriculture And Food, Western Australia Apr 2006

Fire Management Guidelines For Southern Shrubland And Pilbara Pastoral Rangelands : Best Management Practice Guidelines, Department Of Agriculture And Food, Western Australia

Land resources best practice series

Fire is integral to many ecosystems in Western Australian rangelands. Controlled fire can reduce the risk of wild fire, benefit pasture productivity and contribute positively to biodiversity values. Uncontrolled fire is a threat to safety and the business viability of pastoral enterprises and threatens rangeland biodiversity and productivity.This document deals with property-scale management of pastoral leases. Many fire regime issues are more regional in character. These include community safety and health, the impact on regional economies, the societal and cultural values of landscape and the effects on tourism. Ecologically the high productivity, diversity and palatability of recently burnt vegetation is …

Go to article

Fire Management Guidelines For Kimberley Pastoral Rangelands : Best Management Practice Guidelines, Department Of Agriculture And Food, Western Australia Apr 2006

Fire Management Guidelines For Kimberley Pastoral Rangelands : Best Management Practice Guidelines, Department Of Agriculture And Food, Western Australia

Land resources best practice series

Kimberley pastoralists operate in a highly fire-prone environment. Uncontrolled fires pose significant economic, safety, and environmental risks to pastoral enterprises. In contrast, the controlled use of fire can benefit land management, animal production and biodiversity conservation. For any given country type, the interactions of fire, grazing and weather have complex effects on both land condition and animal production. Although general guidelines on the use of fire are valuable, based as they are on a combination of experience and available research findings, they should best be regarded as providing a starting point. At the property level, an adaptive approach that incorporates …

Go to article

The Impact Of Enterprise Risk Management On The Internal Audit Function, Mark S. Beasley, Richard Clune, Dana Hermanson Feb 2006

The Impact Of Enterprise Risk Management On The Internal Audit Function, Mark S. Beasley, Richard Clune, Dana Hermanson

Faculty and Research Publications

This exploratory study provides evidence about factors associated with the overall impact of enterprise risk management (ERM) on the internal audit function’s activities. Based on responses from 122 organizations in several countries, we find that ERM has the greatest impact on internal audit’s activities when (a) the organization’s ERM process is more completely in place, (b) the CFO and audit committee have called for greater internal audit activity related to ERM, (c) the chief audit executive’s (CAE) tenure is longer, (d) the organization is in the banking industry or is an educational institution, and (e) the internal audit function has …

Go to article

Settling-Time Improvements In Positioning Machines Subject To Nonlinear Friction Using Adaptive Impulse Control, Tim Hakala Jan 2006

Settling-Time Improvements In Positioning Machines Subject To Nonlinear Friction Using Adaptive Impulse Control, Tim Hakala

Theses and Dissertations

A new method of adaptive impulse control is developed to precisely and quickly control the position of machine components subject to friction. Friction dominates the forces affecting fine positioning dynamics. Friction can depend on payload, velocity, step size, path, initial position, temperature, and other variables. Control problems such as steady-state error and limit cycles often arise when applying conventional control techniques to the position control problem. Studies in the last few decades have shown that impulsive control can produce repeatable displacements as small as ten nanometers without limit cycles or steady-state error in machines subject to dry sliding friction. These …

Go to article

10x The Talent = 1/3 Of The Credit: How Female Musicians Are Treated Differently In Music, Meggan Jordan Jan 2006

10x The Talent = 1/3 Of The Credit: How Female Musicians Are Treated Differently In Music, Meggan Jordan

Electronic Theses and Dissertations

This is an exploratory, qualitative study of female musicians and their experiences with discrimination in the music industry. Using semi-structured interviews, I analyze the experiences of nine women, ages 21 to 56, who are working as professional musicians, or who have worked professionally in the past. I ask them how they are treated differently based on their gender. Three forms of subtle discrimination are inferred from their narrative histories. First, female musicians are mistaken for non-musicians. They are encapsulated into inferior roles, like "the gimmick," "good for a girl," and "invisible accessory." Second, band mates and band managers control women's …

Go to article

Effect Of Operator Control Configuration On Unmanned Aerial System Trainability, John Neumann Jan 2006

Effect Of Operator Control Configuration On Unmanned Aerial System Trainability, John Neumann

Electronic Theses and Dissertations

Unmanned aerial systems (UAS) carry no pilot on board, yet they still require live operators to handle critical functions such as mission planning and execution. Humans also interpret the sensor information provided by these platforms. This applies to all classes of unmanned aerial vehicles (UAV's), including the smaller portable systems used for gathering real-time reconnaissance during military operations in urban terrain. The need to quickly and reliably train soldiers to control small UAS operations demands that the human-system interface be intuitive and easy to master. In this study, participants completed a series of tests of spatial ability and were then …

Go to article

Evaluación De Anticuerpos Contra El Virus De La Diarrea Viral Bovina De Un Hato En Proceso De Erradicación De La Enfermedad., Zuniga Alfonso H., Hermelinda G. Rivera, Mariluz Araínga, Alberto Manchego S. Jan 2006

Evaluación De Anticuerpos Contra El Virus De La Diarrea Viral Bovina De Un Hato En Proceso De Erradicación De La Enfermedad., Zuniga Alfonso H., Hermelinda G. Rivera, Mariluz Araínga, Alberto Manchego S.

Journal Articles: Pharmacology & Experimental Neuroscience

Antibodies against viral bovine diarrhea virus (BVDV) and of BVDV antigen in serum samples Were evaluated from cattle aged 10 to 23 months (n = 148) from a dairy herd disease eradication where the has-been carrying out since 2002. The herd is located in Santa Rita, Arequipa, Peru, and samples were collected twice on a 30-day interval. Antibodies against BVDV and BVDV antigen were analyzed by viral neutralization and capture ELISA tests respectively. Neutralising antibodies against BVDV were detected in 6.8% (10/148) of animals, and most reactors were 19 to 23 months of age. The antibody titer ranged from 8 …

Go to article

Europe's Thirteenth Directive And U.S. Takeover Regulation: Regulatory Means And Political Economic Ends, Marco Ventoruzzo Jan 2006

Europe's Thirteenth Directive And U.S. Takeover Regulation: Regulatory Means And Political Economic Ends, Marco Ventoruzzo

Journal Articles

Cross-border acquisitions, especially through hostile takeovers, represent one of the most dramatic consequences of the growing integration, both within Europe, and when considering the economic balance of power between the US and the European industries. This Article focuses on the single most important piece of legislation on European takeover law, the Thirteenth Directive of the European Union on Takeover Regulation, which was approved on April, 21 2004 and must be implemented by Member States before the end of 2006.

Passage of the Thirteenth Directive is no minor event. Earlier versions were embroiled in arresting political controversies that generated significant Member …

Go to article

Performing And Agential Selves: Employees As Targets Of Control, And How We, As Academics, Theorise About Them, Karin H. Garrety, Simon Down Jan 2006

Performing And Agential Selves: Employees As Targets Of Control, And How We, As Academics, Theorise About Them, Karin H. Garrety, Simon Down

Faculty of Commerce - Papers (Archive)

Critical management scholars have noted how contemporary management practices encourage and sometimes require workers to adopt multiple identities, and that cynicism, irony and resistance are often manifested in those identities. In this paper, we explore some attributes of modern selfhood that make these positions possible. We concentrate on two related aspects: (1) the capacity of people to reflect on, and manipulate, the selves that they present to the world, and (2) different forms of agency that actors can effect. We argue that closer attention to these attributes can sharpen our analyses of organisational control and its impacts on the self.

Go to article

Robust Motion Tracking Control Of Piezoelectric Actuation Systems, Hwee Choo Liaw, Denny Oetomo, Bijan Shirinzadeh, Gursel Alici Jan 2006

Robust Motion Tracking Control Of Piezoelectric Actuation Systems, Hwee Choo Liaw, Denny Oetomo, Bijan Shirinzadeh, Gursel Alici

Faculty of Engineering - Papers (Archive)

This paper proposes a robust control methodology for piezoelectric actuation systems to track specified motion trajectories. This is motivated by the search for an effective control strategy to deal with the problem of nonlinear behaviour in the piezoelectric actuation systems. The basic concept associated with this approach lies in the specification of a target performance and the formulation of a robust control scheme for the system to ensure the convergence of the position tracking error to zero in the presence of parametric uncertainties and hysteresis effect inclusive of other un-modelled disturbances. Stability of the control system is proven theoretically and …

Go to article

Characterisation And Control Of A Prototype Hts Smes Device, Christopher J. Hawley, Dominic Cuiuri, Christopher D. Cook, Steve Gower, Timothy Beales Jan 2006

Characterisation And Control Of A Prototype Hts Smes Device, Christopher J. Hawley, Dominic Cuiuri, Christopher D. Cook, Steve Gower, Timothy Beales

Faculty of Engineering - Papers (Archive)

A 2.79 kJ prototype high transition temperature Superconducting Magnetic Energy Storage (SMES) device has been constructed. The coil for the prototype has been wound using High Temperature Superconducting (HTS) BSCCO-2223 tape. The refrigeration system is a gaseous helium cold head cryocooler used to maintain the SMES coil at a temperature of 30 K, improving the Ic characteristic of the coil by a factor of 4.7 compared to that at 77 K. The SMES device is capable of supplying a 3-phase load during power interruptions, and has been constructed during a program to develop a larger 20 kJ system aimed at …

Go to article

Distributed Generation Control Using Protection Principles, An D. T Le, Kashem M. Muttaqi, Michael Negnevitsky, Gerard Ledwich Jan 2006

Distributed Generation Control Using Protection Principles, An D. T Le, Kashem M. Muttaqi, Michael Negnevitsky, Gerard Ledwich

Faculty of Engineering and Information Sciences - Papers: Part A

No abstract provided.

Go to article

Control Stabilisation Of An Islanded System With Dfig Wind Turbine, M Aktarujjaman, Kashem M. Muttaqi, Michael Negnevitsky, Gerard Ledwich Jan 2006

Control Stabilisation Of An Islanded System With Dfig Wind Turbine, M Aktarujjaman, Kashem M. Muttaqi, Michael Negnevitsky, Gerard Ledwich

Faculty of Engineering and Information Sciences - Papers: Part A

Distributed Generation (DG) is often used to export power to the utility system. Loss of main supply can cause a severe loading mismatch between DG generation and load consumption. Consequently, the voltage and frequency of the islanded system will cross the allowable limit. Due to this fact, it is essential to control the voltage and frequency in the islanding mode of operation. In this paper, control stabilisation of an islanded system with a doubly-fed induction generator (DFIG) wind turbine has been addressed. Wind DG produces variable output and is not capable to produce enough reactive power. Hence, it is imperative …

Go to article

Control Strategy Of Distributed Generation For Voltage Support In Distribution Systems, An D. T Le, Kashem M. Muttaqi, Michael Negnevitsky, Gerard Ledwich Jan 2006

Control Strategy Of Distributed Generation For Voltage Support In Distribution Systems, An D. T Le, Kashem M. Muttaqi, Michael Negnevitsky, Gerard Ledwich

Faculty of Engineering and Information Sciences - Papers: Part A

Voltage problem is always a critical issue in operating a distribution system. The uncertainties of load distribution and variation have introduced a great complexity to the task of maintaining system voltage within the permitted range. In this paper, small-scale generator, known as distributed generation (DG), is employed in the system and acting as a voltage regulator. The output of DG is controlled in such a way that acceptable level of electrical supply quality is achieved with a reasonable operating cost. The DG controller is tested with a non-uniformly varying load on the time domain basis. Simulations have been conducted with …

Go to article

Experimental Evaluation Of Adaptive And Variable Structure Control Of Piezoelectric Actuation Systems For Micro/Nano Manipulation, Hwee Choo Liaw, Bijan Shirinzadeh, Denny Oetomo, Gursel Alici Jan 2006

Experimental Evaluation Of Adaptive And Variable Structure Control Of Piezoelectric Actuation Systems For Micro/Nano Manipulation, Hwee Choo Liaw, Bijan Shirinzadeh, Denny Oetomo, Gursel Alici

Faculty of Engineering - Papers (Archive)

This paper proposes and evaluates an adaptive technique and a variable structure control approach for piezoelectric actuation systems to track specified motion trajectories. The proposed control methodologies are formulated to accommodate unknown or uncertain system parameters, nonlinearities including the hysteresis effect, and external disturbances in the piezoelectric actuation systems without any form of feed-forward compensation. In this study, both control methodologies are demonstrated to possess a promising motion tracking ability experimentally. In comparison, the variable structure control approach is evaluated to be superior to the adaptive technique in the motion tracking control. With the ability to track motion trajectories under …

Go to article

A Third-Order Differential Steering Robot And Trajectory Generation In The Presence Of Moving Obstacles, Vatana An Jan 2006

A Third-Order Differential Steering Robot And Trajectory Generation In The Presence Of Moving Obstacles, Vatana An

Electronic Theses and Dissertations

In this thesis, four robots will be used to implement a collision-free trajectory planning/replanning algorithm. The existence of a chained form transformation so that the robot's model can be control in canonical form will be analyzed and proved. A trajectory generation for obstacles avoidance will be derived, simulated, and implemented. A specific PC based control algorithm will be developed. Chapter two describes two wheels differential drive robot modeling and existence of controllable canonical chained form. Chapter 3 describes criterion for avoiding dynamic objects, a feasible collision-free trajectory parameterization, and solution to steering velocity. Chapter 4 describes robot implementation, pc wireless …

Go to article

Next Last