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2006

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Articles 16681 - 16710 of 17126

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Calibrating The Wealth And Health Of Nations: Trade, Health, And Foreign Policy After The Wto's First Decade, David P. Fidler Jan 2006

Calibrating The Wealth And Health Of Nations: Trade, Health, And Foreign Policy After The Wto's First Decade, David P. Fidler

Articles by Maurer Faculty

One of the most important themes to emerge from the relationship between trade and health in the first ten year's of the WTO's existence is the challenge of achieving policy coherence. This task is a foreign policy challenge for WTO Members, which requires looking at the relationship between trade and health against the backdrop of the making and implementing of foreign policy. Policy coherence has generally become a major concern for foreign policymakers because post-Cold War trends, such as accelerating globalization, seriously challenge traditional foreign policy assumptions, practices, and institutions. Part of this new context for foreign policy involves the …

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Modeling, Analysis, And Experimental Study Of In Vivo Wheeled Robotic Mobility, Mark E. Rentschler, Jason Dumpert, Stephen R. Platt, Karl Iagnemma, Dmitry Oleynikov, Shane M. Farritor Jan 2006

Modeling, Analysis, And Experimental Study Of In Vivo Wheeled Robotic Mobility, Mark E. Rentschler, Jason Dumpert, Stephen R. Platt, Karl Iagnemma, Dmitry Oleynikov, Shane M. Farritor

Department of Mechanical and Materials Engineering: Faculty Publications

Laparoscopy is abdominal surgery performed with long tools inserted through small incisions. The use of small incisions reduces patient trauma, but also eliminates the surgeon’s ability to view and touch the surgical environment directly. These limitations generally restrict the application of laparoscopy to procedures less complex than those performed during open surgery. This paper presents a theoretical and experimental analysis of miniature, wheeled, in vivo robots to support laparoscopy. The objective is to develop a wireless mobile imaging robot that can be placed inside the abdominal cavity during surgery. Such robots will allow the surgeon to view the surgical environment …

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Lost In Translation: The Economic Analysis Of Law In The United States And Europe, Kenneth G. Dau-Schmidt, Carmen L. Brun Jan 2006

Lost In Translation: The Economic Analysis Of Law In The United States And Europe, Kenneth G. Dau-Schmidt, Carmen L. Brun

Articles by Maurer Faculty

In this Essay, we examine the reasons why the economic analysis of law has not flourished in European countries as it has in the United States. In particular, we focus on three European countries-the United Kingdom, Germany, and France. We argue that differences in culture, the legal system, and the academy have led to differing degrees of success of the law and economics movement in each country. We speculate that, although there is currently less interest in the economic analysis of the law in Europe than in the United States, European interest could dramatically increase if scholars adopt more communitarian …

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Efficient Inverted Polymer Solar Cells, G. Li, C.-W. Chu, V. Shrotriya, Jinsong Huang, Y. Yang Jan 2006

Efficient Inverted Polymer Solar Cells, G. Li, C.-W. Chu, V. Shrotriya, Jinsong Huang, Y. Yang

Department of Mechanical and Materials Engineering: Faculty Publications

We investigate the effect of interfacial buffer layers—vanadium oxide (V2O5) and cesium carbonate (Cs2CO3)—on the performance of polymer solar cells based on regioregular poly-(3-hexylthiophene) and [6,6]-phenyl C60 butyric acid methyl ester blend. The polarity of solar cells can be controlled by the relative positions of these two interfacial layers. Efficient inverted polymer solar cells were fabricated with the structure of indium tin oxide (ITO)/Cs2CO3/polymer blend/vanadium oxide (V2O5)/aluminum (Al). Short-circuit current of 8.42 mA/cm2, open-circuit voltage of 0.56 V, and power conversion efficiency of …

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Improving The Power Efficiency Of White Light-Emitting Diode By Doping Electron Transport Material, Jinsong Huang, Wei-Jen Hou, Juo-Hao Li, Gang Li, Yang Yang Jan 2006

Improving The Power Efficiency Of White Light-Emitting Diode By Doping Electron Transport Material, Jinsong Huang, Wei-Jen Hou, Juo-Hao Li, Gang Li, Yang Yang

Department of Mechanical and Materials Engineering: Faculty Publications

Highly efficient white light emission was realized via the partial energy transfer from blue host polyfluorene (PF) to orange light emission dopant rubrene. A more balanced charge transport was achieved by adding an electron transport material, 2-(4-biphenylyl)-5-(4-tertbutylphenyl)-1,3,4-oxadiazole (PBD), into the PF-rubrene system to enhance the electron transportation. Efficiency improvement by as much as a factor of 2 has been observed through the addition of PBD. These devices can easily reach high luminance at low driving voltages, thus achieving high power efficiency at high luminance (14.8, 13.5, and 12.0 lm/W at the luminances of 1000, 2000, and 4000 cd/m2, …

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The Earth All Around Us: Selected Building Stone In Lincoln, Nebraska. A Walking Tour, William J. Wayne Jan 2006

The Earth All Around Us: Selected Building Stone In Lincoln, Nebraska. A Walking Tour, William J. Wayne

Department of Earth and Atmospheric Sciences: Faculty Publications

Stone has been a primary building material for millennia. Cities, therefore, are treasure troves of earth materials. A wide variety of stones from many places are used for walls, as foundations to support entire buildings, as trim, and more recently as cladding (facing, an overlay). The Earth science teacher can find, in the limited space of an urban environment, a superb collection of stones with which to introduce students to these materials. The surfaces of stones on the outsides of buildings illustrate the durability and the vulnerability of each kind of stone to the local climate. And the history of …

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Evaluating The Effectiveness Of Slicing For Model Reduction Of Concurrent Object-Oriented Programs, Matthew B. Dwyer, John Hatcliff, Matthew Hoosier, Venkatesh Ranganath, Robby, Todd Wallentine Jan 2006

Evaluating The Effectiveness Of Slicing For Model Reduction Of Concurrent Object-Oriented Programs, Matthew B. Dwyer, John Hatcliff, Matthew Hoosier, Venkatesh Ranganath, Robby, Todd Wallentine

School of Computing: Book Chapters

Model checking techniques have proven effective for checking a number of non-trivial concurrent object-oriented software systems. However, due to the high computational and memory costs, a variety of model reduction techniques are needed to overcome current limitations on applicability and scalability. Conventional wisdom holds that static program slicing can be an effective model reduction technique, yet anecdotal evidence is mixed, and there has been no work that has systematically studied the costs/benefits of slicing for model reduction in the context of model checking source code for realistic systems. In this paper, we present an overview of the sophisticated Indus program …

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A Maximum-Likelihood Approach To Symbolic Indirect Correlation, Ashutosh Joshi, George Nagy, Daniel Lopresti, Sharad C. Seth Jan 2006

A Maximum-Likelihood Approach To Symbolic Indirect Correlation, Ashutosh Joshi, George Nagy, Daniel Lopresti, Sharad C. Seth

School of Computing: Conference and Workshop Papers

Symbolic Indirect Correlation (SIC) is a nonparametric method that offers significant advantages for recognition of ordered unsegmented signals. A previously introduced formulation of SIC based on subgraph-isomorphism requires very large reference sets in the presence of noise. In this paper, we seek to address this issue by formulating SIC classification as a maximum likelihood problem. We present experimental evidence that demonstrates that this new approach is more robust for the problem of online handwriting recognition using noisy input.

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On Reoptimizing Multi-Class Classifiers, Kun Deng, Chris Bourke, Stephen Scott, Robert E. Schapire, N. V. Vinodchandran Jan 2006

On Reoptimizing Multi-Class Classifiers, Kun Deng, Chris Bourke, Stephen Scott, Robert E. Schapire, N. V. Vinodchandran

School of Computing: Technical Reports

Significant changes in the instance distribution or associated cost function of a learning problem require one to reoptimize a previously learned classifier to work under new conditions. We study the problem of reoptimizing a multi-class classifier based on its ROC hypersurface and a matrix describing the costs of each type of prediction error. For a binary classifier, it is straightforward to find an optimal operating point based on its ROC curve and the relative cost of true positive to false positive error. However, the corresponding multi-class problem (finding an optimal operating point based on a ROC hypersurface and cost matrix) …

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Modeling Dual Polarization Wireless Fading Channels Using Quaternions, B. J. Wysocki, Tadeusz Wysocki, J. Seberry Jan 2006

Modeling Dual Polarization Wireless Fading Channels Using Quaternions, B. J. Wysocki, Tadeusz Wysocki, J. Seberry

Department of Electrical and Computer Engineering: Faculty Publications (to 2015)

In the letter we describe signal transmitted between two dual-polarized antennas using a quaternion notation. The channel can then be modeled by a single quaternion gain, instead of a matrix of four complex gains as it is done in a classical approach. The model is very useful as it allows for a simple accommodation of any polarization twist between the transmit and receive antennas, as well as, modeling random fading in both polarizations with or without cross-polar scattering.

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Automated Generation Of Context-Aware Tests, Zhimin Wang, Sebastian Elbaum, David Rosenblum Jan 2006

Automated Generation Of Context-Aware Tests, Zhimin Wang, Sebastian Elbaum, David Rosenblum

School of Computing: Technical Reports

The incorporation of context-awareness capabilities into pervasive applications allows them to leverage contextual information to provide additional services while maintaining an acceptable quality of service. These added capabilities, however, introduce a distinct input space that can affect the behavior of these applications at any point during their execution, making their validation quite challenging. In this paper, we introduce an approach to improve the test suite of a context-aware application by identifying context-aware program points where context changes may affect the application’s behavior, and by systematically manipulating the context data fed into the application to increase its exposure to potentially valuable …

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Scaling A Dataflow Testing Methodology To The Multiparadigm World Of Commercial Spreadsheets, Marc Randall Fisher Ii, Gregg Rothermel, Tyler Creelan, Margaret Burnett Jan 2006

Scaling A Dataflow Testing Methodology To The Multiparadigm World Of Commercial Spreadsheets, Marc Randall Fisher Ii, Gregg Rothermel, Tyler Creelan, Margaret Burnett

School of Computing: Technical Reports

Spreadsheets are widely used but often contain faults. Thus, in prior work we presented a dataflow testing methodology for use with spreadsheets, which studies have shown can be used cost-effectively by end-user programmers. To date, however, the methodology has been investigated across a limited set of spreadsheet language features. Commercial spreadsheet environments are multiparadigm languages, utilizing features not accommodated by our prior approaches. In addition, most spreadsheets contain large numbers of replicated formulas that severely limit the efficiency of dataflow testing approaches. We show how to handle these two issues with a new dataflow adequacy criterion and automated detection of …

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Deliberating Debate’S Digital Futures, Carly Woods, Matthew Brigham, Brent Heavner, Takuzo Konishi, John Rief, Brent Saindon, Gordon R. Mitchell Jan 2006

Deliberating Debate’S Digital Futures, Carly Woods, Matthew Brigham, Brent Heavner, Takuzo Konishi, John Rief, Brent Saindon, Gordon R. Mitchell

Department of Communication Studies: Faculty Publications

Human communities can use collective deliberation to make considered decisions regarding their relationship to technology. Such reflection is particularly warranted, because as sociologist Langdon Winner (1986) observes, "technological artifacts have politics" (p. 19). In other words, choices about technology carry political implications, because patterns of sociality are embedded within technical tools (McMillan and Hyde, 2000). Fortunately, Winner notes, "by far the greatest latitude of choice exists the very first time a particular instrument, system, or technique is introduced" (Winner 1986, p. 29). Winner's insight punctuates the salience and timeliness of this forum exchange, which comes at a moment when the …

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Dynamic Lightpath Scheduling In Next-Generation Wdm Optical Networks, Lu Shen, Ajay Todimala, Byrav Ramamurthy, Xi Yang Jan 2006

Dynamic Lightpath Scheduling In Next-Generation Wdm Optical Networks, Lu Shen, Ajay Todimala, Byrav Ramamurthy, Xi Yang

School of Computing: Conference and Workshop Papers

Lightpath scheduling is an important capability in next-generation wavelength-division multiplexing (WDM) optical networks to reserve resources in advance for a specified time period while provisioning end-to-end lightpaths. In this study, we propose an approach to support dynamic lightpath scheduling in such networks. To minimize blocking probability in a network that accommodates dynamic scheduled lightpath demands (DSLDs), resource allocation should be optimized in a dynamic manner. However, for the network users who desire deterministic services, resources must be reserved in advance and guaranteed for future use. These two objectives may be mutually incompatible. Therefore, we propose a two-phase dynamic lightpath scheduling …

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Spatial Correlation-Based Collaborative Medium Access Control In Wireless Sensor Networks, Mehmet C. Vuran, Ian F. Akyildiz Jan 2006

Spatial Correlation-Based Collaborative Medium Access Control In Wireless Sensor Networks, Mehmet C. Vuran, Ian F. Akyildiz

School of Computing: Faculty Publications

Wireless Sensor Networks (WSN) are mainly characterized by dense deployment of sensor nodes which collectively transmit information about sensed events to the sink. Due to the spatial correlation between sensor nodes subject to observed events, it may not be necessary for every sensor node to transmit its data. This paper shows how the spatial correlation can be exploited on the Medium Access Control (MAC) layer. To the best of our knowledge, this is the first effort which exploits spatial correlation in WSN on the MAC layer. A theoretical framework is developed for transmission regulation of sensor nodes under a distortion …

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Museum Visitors’ Understanding Of Evolution, Amy N. Spiegel, E. Margaret Evans, Wendy Gram, Judy Diamond Jan 2006

Museum Visitors’ Understanding Of Evolution, Amy N. Spiegel, E. Margaret Evans, Wendy Gram, Judy Diamond

Department of Educational Psychology: Faculty Publications

In spite of overwhelming scientific evidence supporting evolution, a large percentage of the Ameri-can public does not understand or accept the fundamental principles of evolutionary theory. Museums have an important role in educating children and adults about evolution. This paper reviews recent museum visitor studies, which suggest that while visitors are interested in learning about and less likely to reject evolution than the general public, they tend to have a limited understanding of evolutionary concepts. A new conceptual framework, based on developmental research, indicates that visitors reason about evolution differently depending on the type of organism they are considering, applying …

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Dissolution Kinetics Of High Explosives Particles In A Saturated Sandy Soil, Matthew C. Morley, Hiroshi Yamamoto, Gerald E. Speitel, Jr., Jay Clausen Jan 2006

Dissolution Kinetics Of High Explosives Particles In A Saturated Sandy Soil, Matthew C. Morley, Hiroshi Yamamoto, Gerald E. Speitel, Jr., Jay Clausen

Department of Civil and Environmental Engineering: Faculty Publications

Solid phase high explosive (HE) residues from munitions detonation may be a persistent source of soil and groundwater contamination at military training ranges. Saturated soil column tests were conducted to observe the dissolution behavior of individual components (RDX, HMX, and TNT) from two HE formulations (Comp B and C4). HE particles dissolved readily, with higher velocities yielding higher dissolution rates, higher mass transfer coefficients, and lower effluent concentrations. Effluent concentrations were below solubility limits for all components at superficial velocities of 10–50 cm day-1. Under continuous flow at 50 cm day-1, RDX dissolution rates from Comp …

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Detection Of Inclement Weather Conditions At A Signalized Intersection Using A Video Image Processing Algorithm, Anuj Sharma, Darcy M. Bullock, Srinivas Peeta, James V. Krogmeier Jan 2006

Detection Of Inclement Weather Conditions At A Signalized Intersection Using A Video Image Processing Algorithm, Anuj Sharma, Darcy M. Bullock, Srinivas Peeta, James V. Krogmeier

Department of Civil and Environmental Engineering: Faculty Publications

Inclement weather conditions like snowfall adversely affect traffic flow characteristics, necessitating a change in parameters that define the operation of a signalized intersection. A weather-based timing plan selection is needed to maintain a desirable level of operational efficiency. Automatic implementation of weather-based timing at intersections requires accurate and timely detection of snowfall. This paper presents a snow detection algorithm that uses live video feed obtained from a video image vehicle detection system present at an intersection.

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Stochastic Algorithm For Improved Operations At Isolated High Speed Intersections, Anuj Sharma, Darcy M. Bullock, Srinivas Peeta Jan 2006

Stochastic Algorithm For Improved Operations At Isolated High Speed Intersections, Anuj Sharma, Darcy M. Bullock, Srinivas Peeta

Department of Civil and Environmental Engineering: Faculty Publications

The current practice of specifying simultaneous gap out logic at isolated high speed signalized intersections places constraints on the signal controller logic that cannot be satisfied under high congestion level. Further, it often results in degraded signal efficiency and dilemma zone protection. A stochastic approach is proposed in this paper with the objective of increasing safety and efficiency at these intersections.

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Imse Alumni Survey Of Abet Program Educational Objectives, Paul Savory Jan 2006

Imse Alumni Survey Of Abet Program Educational Objectives, Paul Savory

Department of Industrial and Management Systems Engineering: Faculty Publications

This report showcases the results of the Department of Industrial and Management System Engieering's survey of alumni regarding our updated ABET Program Educational Objectives. The Program Educational Objectives represent the expected characteristics of industrial engineering graduates within three to five years of receiving a Bachelor of Science degree in Industrial and Management Systems Engineering from the University of Nebraska-Lincoln. A total of 76 responses were received. The alumni survey responses indicate strong agreement and approval for the new Program Educational Objectives. The associated comments will be used by the IMSE faculty to future refine the course curriculum to ensure that …

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A Template-Based Data Specification Framework For Modeling Physical Security Systems, Ashu Guru, Paul Savory Jan 2006

A Template-Based Data Specification Framework For Modeling Physical Security Systems, Ashu Guru, Paul Savory

Department of Industrial and Management Systems Engineering: Faculty Publications

Simulation studies often fail to provide any useful results due to its success being highly dependent on the skills of the analyst to understand a system and then correctly identify all the required data parameters and dependent variables. This paper describes a template-based framework to help identify and specify the components and data parameters for developing models of physical security systems. The layered framework consists of fifteen templates built on top of fourteen data primitives representing 119 data parameters. The modeling framework has been programmed as an internet-based web application and is simulation language independent. The usefulness of the framework …

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The Solar Flare Of The 14th Of July 2000 (L3+C Detector Results), Pablo Achard, Gyöngyi Baksay, László A. Baksay, K Dehmelt, Marcus Hohlmann, D Rembeczki, Z Szillasi, I Vodopianov, The L3 Collaboration Jan 2006

The Solar Flare Of The 14th Of July 2000 (L3+C Detector Results), Pablo Achard, Gyöngyi Baksay, László A. Baksay, K Dehmelt, Marcus Hohlmann, D Rembeczki, Z Szillasi, I Vodopianov, The L3 Collaboration

Aerospace, Physics, and Space Science Faculty Publications

Aims.Several experiments have reported observations on possible correlations between the flux of high energy muons and intense solar flares. If confirmed, these observations would have significant implications for acceleration processes in the heliosphere able to accelerate protons and other ions to energies of at least tens of GeV. Methods.The solar flare of the 14 of July 2000 offered a unique opportunity for the L3+C experiment to search for a correlated enhancement in the flux of muons using the L3 precision muon spectrometer. Its capabilities for observing a directional excess in the flux of muons above 15 GeV (corresponding to primary …

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Origin Of Heavy Ions In Upstream Events Near The Earth's Bow Shock, Mihir I. Desai, Glenn M. Mason, Joseph E. Mazur, Joseph R. Dwyer Jan 2006

Origin Of Heavy Ions In Upstream Events Near The Earth's Bow Shock, Mihir I. Desai, Glenn M. Mason, Joseph E. Mazur, Joseph R. Dwyer

Aerospace, Physics, and Space Science Faculty Publications

We have surveyed the ∼20-160 keV/nucleon heavy ion composition of 2102 upstream events observed by the Wind/STEP instrument near the Earth's bow shock over a complete solar cycle from day 325, 1994 through day 90, 2006. Our main results are: (1) During solar minimum conditions, both the C/O and Fe/O ratios are similar to the corresponding values measured in the solar wind and/or CIRs. (2) During solar maximum conditions, the C/O ratio is similar to that measured in SEP and CME-driven IP shock events, while the Fe/O ratio lies between the values measured in IP shock and SEP events. We …

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Problem Based Learning, Susan Tebbe Jan 2006

Problem Based Learning, Susan Tebbe

Graduate Research Papers

The No Child Left Behind legislation brought about a flurry of conversations regarding student achievement (McElroy, 2006). Increased use of standardized testing to measure student achievement has resulted in a discussion of teaching models. Is the transmission teaching model with its expository style the only mode to insure student success? Or is the constructivist teaching model with its inquiry style a mode that better leads to student success? This review of literature examines the instructional practices involved in problem based learning, a constructivist approach. The paper focuses on the components of problem-based learning, the benefits and challenges of using this.approach, …

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Teacher Autonomy : A Review Of The Research Literature, Jaime A. Usma-Wilches Jan 2006

Teacher Autonomy : A Review Of The Research Literature, Jaime A. Usma-Wilches

Graduate Research Papers

This paper reviews conceptual and empirical research on teacher autonomy in the context of school reform across countries. Research shows that teacher autonomy can be conceptualized as a personal sense of freedom from interference or in terms of teachers' exercise of control in four different school domains: Teaching and assessment, curriculum development, school functioning, and professional development. Research also confirms that teachers' autonomy for decision making is shaped by a number of personal and contextual factors, and that teachers' directed professional development experiences may enhance their autonomy. This review clarifies the meaning of teacher autonomy and other related terms, and …

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Individual Home Sewage Treatment Systems, Thomas F. Scherer Jan 2006

Individual Home Sewage Treatment Systems, Thomas F. Scherer

AE Series – Agricultural Engineering/ABEN

No abstract provided.

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American Library Association (Ala) Midwinter Meeting Report, Christopher Cox, Hui Hua Chua, M. Claire Stewart, S. G. Ranti Junus Jan 2006

American Library Association (Ala) Midwinter Meeting Report, Christopher Cox, Hui Hua Chua, M. Claire Stewart, S. G. Ranti Junus

University of Nebraska-Lincoln Libraries: Faculty Publications

The American Library Association Midwinter Meeting was held in San Antonio, Texas, January 20–25, 2006. The following are highlights from the meeting. We have a range of coverage and reviewers. Christopher Cox gives us an update on groups discussing digital media such as HD-DVD and Blu-ray, electronic reference books, and RFID issues. Hui Hua Chua writes about a discussion on federated searching. M. Claire Stewart reports on the inaugural meeting of the ALCTS Preservation and Reformatting Section’s Digital Preservation Discussion Group and a whirlwind meeting on standards, which included the discussion of five standards and the overall National Information Standards …

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The Impact Of Open Source On Preinvention Assignment Contracts, Michael Mattioli Jan 2006

The Impact Of Open Source On Preinvention Assignment Contracts, Michael Mattioli

Articles by Maurer Faculty

This comment studies the implications of open source on pre-invention assignment agreements. Part I analyzes the basis for past enforcement of these contracts, with an eye toward distinctions between open source projects and more traditional commercial endeavors. Part II briefly reviews the history of patents and explores constitutional and contract-based arguments against the pre-invention assignment. Part III begins with a discussion of open source and then explores how this new phenomenon perfectly fulfills the goals behind the Patent Act. With these addressed, the central inquiry of pre-invention assignment agreements, as they could conflict with open source inventions, will be addressed. …

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Social And Economic Rights: A Critique, Aryeh Neier Jan 2006

Social And Economic Rights: A Critique, Aryeh Neier

Human Rights Brief

No abstract provided.

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Which Place, What Story?: Cultural Discourses At The Border Of The Blackfeet Reservation And Glacier National Park, Donal Carbaugh, Lisa Rudnick Jan 2006

Which Place, What Story?: Cultural Discourses At The Border Of The Blackfeet Reservation And Glacier National Park, Donal Carbaugh, Lisa Rudnick

Great Plains Quarterly (through 2013)

Among every known people, places are named, and in every known place, stories are told. Yet as one place, Jerusalem, makes so abundantly clear, the meanings of the place and the variety of stories attached to it can derive from a variety of traditions and can lead in many different directions. Just as various pilgrims are drawn to some sacred places, so do all people, in all places, come to know the meanings of at least some places through names, with the stories about them capturing their deeper significance, from the sacred to the mundane. Yet for each such place, …

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