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2006

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Dynamics Of Globalization In Philippine Scientific Communities, Marcus Antonius Hidalgo Ynalvez Jan 2006

Dynamics Of Globalization In Philippine Scientific Communities, Marcus Antonius Hidalgo Ynalvez

LSU Doctoral Dissertations

This research attempts to shed light on the simultaneous influence of scientifically strong countries on Internet use and knowledge production at the global periphery. Using survey data from interviews of 312 Filipino scientists, this study answers the following questions: (1) Does place of graduate education (i.e., Australia, Japan, the United States and the Philippines) configure scientists’ Internet use? (2) Does Internet use shape scientists’ professional network? (3) Does place of graduate education, Internet use and professional network influence collaboration and research productivity? and (4) How does collaboration relate to productivity when professional network is accounted for? Results show that digital …

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The Lived Experience Of Nurses Working With Student Nurses In The Acute Care Clinical Environment, Donna Coffey Hathorn Jan 2006

The Lived Experience Of Nurses Working With Student Nurses In The Acute Care Clinical Environment, Donna Coffey Hathorn

LSU Doctoral Dissertations

The purpose of this phenomenological qualitative study was to describe the lived experience of nurses’ who work with baccalaureate student nurses in the acute care clinical environment. Because of the nursing shortage nursing education is challenged with equipping a safe qualified workforce while preventing or reducing student attrition. Students may choose to leave the profession or receive less than optimal learning experiences when exposed to negative socialization behaviors of nurses while in the clinical environment. Findings from this study can be used to foster collaboration between nursing education and nursing service in the development of positive clinical environments for nurses …

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Serious Gordon: Using Serious Games To Teach Food Safety In The Kitchen., Brian Mac Namee, Pauline Rooney, Patrick Lindstrom, Andrew Ritchie, Frances Boylan, Greg Burke Jan 2006

Serious Gordon: Using Serious Games To Teach Food Safety In The Kitchen., Brian Mac Namee, Pauline Rooney, Patrick Lindstrom, Andrew Ritchie, Frances Boylan, Greg Burke

Conference papers

This paper will describe the development of Serious Gordon, an interactive digital game developed to tech the basics of kitchen food safety to workers in industries dealing with food. The motivations driving the development of the game will be described as will the development process itself. An initial evaluation of the game, from both a technical and pedagogical point of view, will be presented as will conclusions on the viability of using a commercial game engine for the purpose of developing educational games.

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Preaching To The Converted?:Knowledge-Based Management Of Higher Education Institutes., Deirdre Lillis Jan 2006

Preaching To The Converted?:Knowledge-Based Management Of Higher Education Institutes., Deirdre Lillis

Conference papers

Almost all absurdity of conduct arises from the imitation of those whom we cannot resemble. Samuel Johnson. The organisational culture of higher education institutes has been described in the literature as a professional bureaucracy where change creeps in not sweeps in (Mintzberg 1996). Operating within the constraints of public sector leglislation higher education institutes typically have a largely autonomous workforce with a highly compartmentalised organizational structure. The difficulties involved in providing a central steering core present some unique challenges to its management (Clark 1996). When faced with mounting external pressures for accountability, quality assurance, flexible delivery and others the unique …

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Bar Raising Or Navel-Gazing?:The Effectiveness Of Self-Study Programmes In Eading To Improvements In Institutional Performance, Deirdre Lillis Jan 2006

Bar Raising Or Navel-Gazing?:The Effectiveness Of Self-Study Programmes In Eading To Improvements In Institutional Performance, Deirdre Lillis

Conference papers

Higher Education Institutes worldwide are investing significant resources in self study programmes to improve institutional performance, to enhance quality and to meet external stakeholder demands. The institutional impacts of both internally and externally mandated self study programmes is an area where little empirical research exists. A key question is whether self study programmes are effective (or otherwise) in leading to improvements in institutional performance and the reasons why. Covering an eight year period, from 1997–2006, this paper reports on the use of systematic evaluation methodology (Rossi et al., 2003) to evaluate the effectiveness of three self study programmes in leading …

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Incremental Generation Of Spatial Referring Expressions In Situated Dialogue, John D. Kelleher, Geert-Jan Kruijff Jan 2006

Incremental Generation Of Spatial Referring Expressions In Situated Dialogue, John D. Kelleher, Geert-Jan Kruijff

Conference papers

This paper presents an approach to incrementally generating locative expressions. It addresses the issue of combinatorial explosion inherent in the construction of relational context models by: (a) contextually defining the set of objects in the context that may function as a landmark, and (b) sequencing the order in which spatial relations are considered using a cognitively motivated hierarchy of relations, and visual and discourse salience.

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Spatial Prepositions In Context: The Semantics Of Near In The Presence Of Distractor Objects., Fintan Costello, John D. Kelleher Jan 2006

Spatial Prepositions In Context: The Semantics Of Near In The Presence Of Distractor Objects., Fintan Costello, John D. Kelleher

Conference papers

The paper examines how people’s judgements of proximity between two objects are influenced by the presence of a third object. In an experiment participants were presented with images containing three shapes in different relative positions, and asked to rate the acceptability of a locative expression such as ‘the circle is near the triangle’ as descriptions of those images. The results showed an interaction between the relative positions of objects and the linguistic roles that those objects play in the locative expression: proximity was a decreasing function of the distance between the object in the head position in the expression and …

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Reflections On Teaching A Mathematics Education Course, Sarah Elizabeth Smitherman Jan 2006

Reflections On Teaching A Mathematics Education Course, Sarah Elizabeth Smitherman

LSU Doctoral Dissertations

Teaching and learning involve reflexive actions and should be chosen thoughtfully and deliberately, not because someone has decided “what works.” In this study, I examine how complex conversations might offer pedagogical and theoretical (re)considerations in a teacher education course on mathematics. The term “math methods” is a doubly weighted phrase, for both mathematics and methods connote particular ideologies prevalent in current educational rhetoric. In order to unpack the impact of these words, I engage in research based on inquiry, historical analysis, and personal reflections, all of which I use in an eclectic, thoughtful, and explorative manner. The two main research …

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Judicial Power And Mobilizable History, Richard A. Primus Jan 2006

Judicial Power And Mobilizable History, Richard A. Primus

Articles

One contribution that law professors can make to constitutional discourse, I suggest, is the nurturing of new mobilizable histories. A "mobilizable history," as I will use the term, is a narrative, image, or other historical source that is sufficiently well-known to the community of constitutional decisionmakers so as to be able to support a credible argument in the discourse of constitutional law. It draws upon materials that are within the collective memory of constitutional interpreters; indeed, a necessary step in nurturing a new mobilizable history is to introduce new information into that collective memory or to raise the prominence of …

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Once Proud Princes: Planters And Plantation Culture In Louisiana's Northeast Delta, From The First World War Through The Great Depression, James Matthew Reonas Jan 2006

Once Proud Princes: Planters And Plantation Culture In Louisiana's Northeast Delta, From The First World War Through The Great Depression, James Matthew Reonas

LSU Doctoral Dissertations

The Delta country of northeast Louisiana is a richly productive alluvial region stretching south from the Arkansas line to the confluence of the Red and Mississippi Rivers below Natchez. As the source of great cotton fortunes made during antebellum times, it reflected the Old South ideal and, for several decades after the end of the Civil War, remained firmly grounded in this old plantation culture. The economic depression of the 1890s and the coming of the boll weevil in the early 1900s, however, signaled a gradual decline that turned into full-blown dissolution in the years following the First World War. …

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The Effectiveness Of Virtual Facilitation In Supporting Gdss Appropriation And Structured Group Decision Making, Harold Joseph Lagroue Jan 2006

The Effectiveness Of Virtual Facilitation In Supporting Gdss Appropriation And Structured Group Decision Making, Harold Joseph Lagroue

LSU Doctoral Dissertations

Since their introduction a quarter of a century ago, group decision support systems (GDSS) have evolved from applications designed primarily to support decision making for groups in face-to-face settings, to their growing use for “web conferencing,” online collaboration, and distributed group decision-making. Indeed, it is only recently that such groupware applications for conducting face-to-face, as well as “virtual meetings” among dispersed workgroups have achieved mainstream status, as evidenced by Microsoft’s ubiquitous advertising campaign promoting its “Live Meeting” electronic meeting systems (EMS) software. As these applications become more widely adopted, issues relating to their effective utilization are becoming increasingly relevant. This …

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Biblical Exposition And Faith Integration, Robby Waddell Dr. Jan 2006

Biblical Exposition And Faith Integration, Robby Waddell Dr.

Syllabus Repository

No abstract provided.

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Massive Primary Postpartum Haemorrhage: Setting Up Standards Of Care, Lumaan Sheikh, Nadeem F. Zuberi, Rubab Riaz, Javed H. Rizvi Jan 2006

Massive Primary Postpartum Haemorrhage: Setting Up Standards Of Care, Lumaan Sheikh, Nadeem F. Zuberi, Rubab Riaz, Javed H. Rizvi

Department of Obstetrics & Gynaecology

Objective: To review practice of massive primary postpartum haemorrhage management and develop a protocol.
Methods: Cross-sectional study conducted at the Department of Obstetrics and Gynaecology at Aga Khan University Hospital, Karachi between January 1, 2003 and July 31, 2004. Women with primary postpartum haemorrhage and had blood loss >1000ml were included in the study. Medical record files of these women were reviewed for maternal mortality and morbidities which included mode of delivery, possible cause of postpartum haemorrhage, supportive, medical and surgical interventions.
Results: Approximately 3% (140/4881) of women had primary postpartum haemorrhage. 'Near miss' cases with blood loss …

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The Accuracy Of Ultrasound In The Diagnosis Of Congenital Abnormalities, Shama Munim, Salva Nadeem, Nadya Ali Khuwaja Jan 2006

The Accuracy Of Ultrasound In The Diagnosis Of Congenital Abnormalities, Shama Munim, Salva Nadeem, Nadya Ali Khuwaja

Department of Obstetrics & Gynaecology

Objective: To determine the accuracy of ultrasound in the diagnosis of congenital abnormalities at the Aga Khan University Hospital, Karachi.
Methods: The data of congenital abnormalities was obtained from the obstetrical database and medical records of all cases complicated by congenital abnormalities, delivering from January 2001 to December 2003 and was reviewed. Antenatal ultrasounds had been performed by operators with different level of experience. In addition this data was retrieved from the termination and Congenital anomaly register. A structured data collection form was used to collect information of different variables of interest.
Results: Congenital abnormalities, complicated 2.8% (n=170), of all …

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Force Measurements On A Flapping And Pitching Wing At Low Reynolds Numbers, Kakkattukuzhy M. Isaac, Anthony Colozza, Jessica Rolwes Jan 2006

Force Measurements On A Flapping And Pitching Wing At Low Reynolds Numbers, Kakkattukuzhy M. Isaac, Anthony Colozza, Jessica Rolwes

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Force measurements from experiments conducted in water on a flapping-and-pitching thin flat plate wing of semi-elliptic planform at low Reynolds numbers are reported. Time varying force data, measured using a force transducer, provide a means to understand the mechanisms that lead to enhanced performance observed in insect flight compared to fixed wing aerodynamics. Experimental uncertainties associated with low level (∼1N) fluid dynamic force measurements on flapping-and-pitching wings are addressed. a previously proposed pitching mode in which the leading edge and trailing edge switch roles to allow using cambered airfoils has been shown to be viable and may have advantages over …

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Effects Of Current On Droplet Generation And Arc Plasma In Gas Metal Arc Welding, J. Hu, Hai-Lung Tsai Jan 2006

Effects Of Current On Droplet Generation And Arc Plasma In Gas Metal Arc Welding, J. Hu, Hai-Lung Tsai

Mechanical and Aerospace Engineering Faculty Research & Creative Works

In gas metal arc welding (GMAW), a technology using pulsed currents has been employed to achieve the one-droplet-per-pulse (ODPP) metal transfer mode with the advantages of low average currents, a stable and controllable droplet generation, and reduced spatter. In this paper, a comprehensive model was developed to study the effects of different current profiles on the droplet formation, plasma generation, metal transfer, and weld pool dynamics in GMAW. Five types of welding currents were studied, including two constant currents and three wave form currents. In each type, the transient temperature and velocity distributions of the arc plasma and the molten …

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Neural Network Approach For Obstacle Avoidance In 3-D Environments For Uavs, Vivek Yadav, Xiaohua Wang, S. N. Balakrishnan Jan 2006

Neural Network Approach For Obstacle Avoidance In 3-D Environments For Uavs, Vivek Yadav, Xiaohua Wang, S. N. Balakrishnan

Mechanical and Aerospace Engineering Faculty Research & Creative Works

In this paper a controller design is proposed to get obstacle free trajectories in a three dimensional urban environment for unmanned air vehicles (UAVs). The controller has a two-layer architecture. In the upper layer, vision-inspired Grossberg neural network is proposed to get the shortest distance paths. In the bottom layer, a model predictive control (MPC) based controller is used to obtain dynamically feasible trajectories. Simulation results are presented for to demonstrate the potential of the approach.

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Nonlinear Control Concepts For A Ua, Vijayakumar Janardhan, Derek Schmitz, S. N. Balakrishnan Jan 2006

Nonlinear Control Concepts For A Ua, Vijayakumar Janardhan, Derek Schmitz, S. N. Balakrishnan

Mechanical and Aerospace Engineering Faculty Research & Creative Works

A reconfigurable flight control method is developed to be implemented on an Unmanned Aircraft (UA), a thirty percent scale model of the Cessna 150. This paper presents the details of the UA platform, system identification, reconfigurable controller design, development, and implementation on the UA to analyze the performance metrics. A Crossbow Inertial Measurement Unit provides the roll, pitch, and yaw accelerations and rates along with the roll and pitch. The 100-400 mini-air data boom from SpaceAge Control provides the airspeed, altitude, angle of attack, and the side slip angles. System identification is accomplished by commanding preprogrammed inputs to the control …

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Plasma Modeling For Ultrashort Laser Ablation Of Dielectrics, Lan Jiang, Hai-Lung Tsai Jan 2006

Plasma Modeling For Ultrashort Laser Ablation Of Dielectrics, Lan Jiang, Hai-Lung Tsai

Mechanical and Aerospace Engineering Faculty Research & Creative Works

In ultrashort pulse (<10 ps) laser ablation of dielectrics, affected materials are first transformed into absorbing plasma with metallic properties and, then, the subsequent laser-plasma interaction causes material removals. For ultrashort-pulse laser ablation of dielectrics, this study proposes a model using the Fokker-Planck equation for electron density distribution, a plasma model for the optical properties of ionized dielectrics, and quantum treatments for electron heating and relaxation time. The free electron density distribution of the plasma within the pulse duration is then used to determine the ablation crater shape. The predicted threshold fluences and ablation depths for barium aluminum borosilicate and fused silica are in agreement with published experimental data. It is found that the significantly varying optical properties in time and space are the key factors determining the ablation crater shape. The effects of fluence and pulse duration are also studied.

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Statistically Steady Measurements Of Rayleigh-Taylor Mixing In A Gas Channel, Malcolm J. Andrews, Arindam Banerjee Jan 2006

Statistically Steady Measurements Of Rayleigh-Taylor Mixing In A Gas Channel, Malcolm J. Andrews, Arindam Banerjee

Mechanical and Aerospace Engineering Faculty Research & Creative Works

A novel gas channel experiment is described to study the development of high Atwood number Rayleigh-Taylor mixing. Two gas streams, one containing air and the other containing a helium-air mixture, flow parallel to each other separated by a thin splitter plate. The streams meet at the end of a splitter plate leading to the formation of an unstable interface and of buoyancy driven mixing. This buoyancy driven mixing experiment allows for long data collection times, has short transients, and is statistically steady. The facility was designed to be capable of large Atwood number studies (At~0.75). We describe initial validation work …

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An Optimal Dynamic Inversion Approach For Controlling A Class Of One-Dimensional Nonlinear Distributed Parameter Systems, Radhakant Padhi, S. N. Balakrishnan Jan 2006

An Optimal Dynamic Inversion Approach For Controlling A Class Of One-Dimensional Nonlinear Distributed Parameter Systems, Radhakant Padhi, S. N. Balakrishnan

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Combining the principles of dynamic inversion and optimization theory, a new approach is presented for stable control of a class of one-dimensional nonlinear distributed parameter systems, assuming the availability a continuous actuator in the spatial domain. Unlike the existing approximate-then-design and design-then-approximate techniques, here there is no need of any approximation either of the system dynamics or of the resulting controller. Rather, the control synthesis approach is fairly straight-forward and simple. The controller formulation has more elegance because we can prove the convergence of the controller to its steady state value. To demonstrate the potential of the proposed technique, a …

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Dynamic Re-Optimization Of A Spacecraft Attitude Controller In The Presence Of Uncertainties, Nishant Unnikrishnan, S. N. Balakrishnan, Radhakant Padhi Jan 2006

Dynamic Re-Optimization Of A Spacecraft Attitude Controller In The Presence Of Uncertainties, Nishant Unnikrishnan, S. N. Balakrishnan, Radhakant Padhi

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Online trained neural networks have become popular in recent years in the design of robust and adaptive controllers for dynamic systems with uncertainties due to their universal function approximation capabilities. This paper discusses a technique that dynamically reoptimizes a Single Network Adaptive Critic (SNAC) based optimal controller in the presence of unmodeled plant uncertainties. The SNAC based optimal controller designed for the nominal plant model no more retains optimality in the presence of uncertainties/unmodeled dynamics that may creep up in the system equations during operation. This calls for a strategy to re-optimize the existing SNAC controller with respect to the …

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Experimental Simulation Of Lightning Optical Emissions In Clouds, Anil Ogale, Kunal Mitra, Arindam Banerjee Jan 2006

Experimental Simulation Of Lightning Optical Emissions In Clouds, Anil Ogale, Kunal Mitra, Arindam Banerjee

Mechanical and Aerospace Engineering Faculty Research & Creative Works

The objective of the study is to experimentally determine the information content of lightning optical emissions through clouds. Clouds affect the amplitude of lightning signals and the apparent dimensions of the optical source. Multiple scattering from the cloud media also alters the shape of the temporal profile of the lightning signal. The goal is to provide accurate estimates of the arrival time delay and temporal pulse width broadening of output signals emitted from clouds for different cloud and lightning parameters. Experiments conducted in the laboratory yield a temporally broadened pulse with an overall decrease in the peak and a delay …

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Magnetically Filtered Faraday Probe For Measuring The Ion Current Density Profile Of A Hall Thruster., Joshua L. Rovey, Mitchell L. R. Walker, Alec D. Gallimore, Peter Y. Peterson Jan 2006

Magnetically Filtered Faraday Probe For Measuring The Ion Current Density Profile Of A Hall Thruster., Joshua L. Rovey, Mitchell L. R. Walker, Alec D. Gallimore, Peter Y. Peterson

Mechanical and Aerospace Engineering Faculty Research & Creative Works

The ability of a magnetically filtered Faraday probe (MFFP) to obtain the ion current density profile of a Hall thruster is investigated. The MFFP is designed to eliminate the collection of low-energy, charge-exchange (CEX) ions by using a variable magnetic field as an ion filter. In this study, a MFFP, Faraday probe with a reduced acceptance angle (BFP), and nude Faraday probe are used to measure the ion current density profile of a 5 kW Hall thruster operating over the range of 300-500 V and 5-10 mg/s. The probes are evaluated on a xenon propellant Hall thruster in the University …

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Neuroadaptive Model Following Controller Design For A Nonaffine Uav Model, Nishant Unnikrishnan, S. N. Balakrishnan Jan 2006

Neuroadaptive Model Following Controller Design For A Nonaffine Uav Model, Nishant Unnikrishnan, S. N. Balakrishnan

Mechanical and Aerospace Engineering Faculty Research & Creative Works

This paper proposes a new model-following adaptive control design technique for nonlinear systems that are nonaffine in control. The adaptive controller uses online neural networks that guarantee tracking in the presence of unmodeled dynamics and/or parameter uncertainties present in the system model through an online control adaptation procedure. The controller design is carried out in two steps: (i) synthesis of a set of neural networks which capture the unmodeled (neglected) dynamics or model uncertainties due to parametric variations and (ii) synthesis of a controller that drives the state of the actual plant to that of a reference model. This method …

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Optimal Impulse Control Of Systems With Control Constraints And Application To Hiv Treatment, Vivek Yadav, S. N. Balakrishnan Jan 2006

Optimal Impulse Control Of Systems With Control Constraints And Application To Hiv Treatment, Vivek Yadav, S. N. Balakrishnan

Mechanical and Aerospace Engineering Faculty Research & Creative Works

In this paper, conditions for optimal impulse control of an impulsive system with constraints on control are derived. These hold for a system whose states can be changed instantaneously at discrete times with impulses while a continuous control is being applied between those times. The conditions derived are applied to the problem of optimal HIV treatment. Simulation results are presented to show the treatment procedure. The results obtained show that the intervention method developed leads to good results.

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Police Interrogation Of Juveniles: An Empirical Study Of Policy And Practice, Barry C. Feld Jan 2006

Police Interrogation Of Juveniles: An Empirical Study Of Policy And Practice, Barry C. Feld

Articles

The Supreme Court does not require any special procedural safeguards when police interrogate youths and use the adult standard--“knowing, intelligent, and voluntary under the totality of the circumstances”--to gauge the validity of juveniles' waivers of Miranda rights. Developmental psychologists have studied adolescents' capacity to exercise Miranda rights, questioned whether juveniles possess the cognitive ability and adjudicative competence necessary to exercise legal rights, and contended that immaturity and vulnerability make juveniles uniquely susceptible to police interrogation tactics. In the four decades since the Court decided Miranda, we have almost no empirical research about what actually occurs when police interview criminal suspects, …

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Institutional Review Boards, Regulatory Incentives, And Some Modest Proposals For Reform, Dale Carpenter Jan 2006

Institutional Review Boards, Regulatory Incentives, And Some Modest Proposals For Reform, Dale Carpenter

Articles

It is time to rethink the role of Institutional Review Boards (IRBs) in approving social science research. While most law professors conduct their research in an almost unregulated environment - pouring through cases, statutes, and each other's articles, all without the kind of human interaction subject to IRB regulation - their colleagues elsewhere in the university have been coping for decades with an increasingly intrusive bureaucracy that sometimes undermines basic academic values. Three things seem very clear. First, there are a lot of IRBs - at least 4,000 - and their numbers are growing. Second, they have recently "increased their …

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International Customary Law And Articulation Theories: An Economic Analysis, Francesco Parisi, Vincy Fon Jan 2006

International Customary Law And Articulation Theories: An Economic Analysis, Francesco Parisi, Vincy Fon

Articles

No abstract provided.

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Ab Initio Molecular Dynamics Simulations Of Methylaluminoxane (Mao) Synthesis By Hydrolysis Of Trimethylaluminum, Lacramioara Negureanu Jan 2006

Ab Initio Molecular Dynamics Simulations Of Methylaluminoxane (Mao) Synthesis By Hydrolysis Of Trimethylaluminum, Lacramioara Negureanu

LSU Doctoral Dissertations

MAO is the co-catalyst in the metallocene catalytic systems, which are widely used in single site olefin polymerization due to their high stereoselectivity. To date, the precise structure of MAO, the particular compound or compounds catalytically active in MAO, have eluded researchers. MAO, a white amorphous powder, is not a good sample for a direct spectroscopic characterization, and its NMR spectra are broad and almost featureless. Many structural models have been proposed but none are generally accepted. In the first part of this work the MAO formation mechanism was addressed. Molecular dynamics simulations at MP2 configuration interaction theory level have …

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