Digital Commons Network^™

Slam: Sleep-Wake Aware Local Monitoring In Sensor Networks, Issa Khalil, Saurabh Bagchi, Ness B. Shroff

Department of Electrical and Computer Engineering Technical Reports

Sleep-wake protocols are critical in sensor networks to ensure long-lived operation. However, an open problem is how to develop efficient mechanisms that can be incorporated with sleep-wake protocols to ensure both longlived operation and a high degree of security. Our contribution in this paper is to address this problem by using local monitoring, a powerful technique for detecting and mitigating control/data attacks in sensor networks. In local monitoring, a node oversee part of the traffic going in and out of its neighbors to determine if the behavior is suspicious, such as, delay in forwarding a packet. However, a direct application …

The Limits Of Training In Iraqi Force Development, Gary Felicetti

The US Army War College Quarterly: Parameters

No abstract provided.

How Do The Effects Of Local Growth On Employment Rates Vary With Initial Labor Market Conditions?, Timothy J. Bartik

Upjohn Institute Working Papers

This paper examines how the effects of increased employment growth on a metropolitan area's employment to population ratio varies with the initial tightness of the metropolitan area's labor market. This examination is relevant to evaluating the benefits of local economic development policies in different metropolitan areas. Much of the benefits of such policies are in higher employment rates. The empirical estimates suggest that the effectiveness of employment growth in increasing the employment to population ratio is lower in metropolitan areas with "tight" labor markets. In addition, some estimates suggest that growth has the greatest long-run effects on the employment to …

An Improved Distance Heuristic Function For Directed Software Model Checking, Eric G. Mercer, Neha Rungta

Faculty Publications

State exploration in directed software model checking is guided using a heuristic function to move states near errors to the front of the search queue. Distance heuristic functions rank states based on the number of transitions needed to move the current program state into an error location. Lack of calling context information causes the heuristic function to underestimate the true distance to the error; however, inlining functions at call sites in the control flow graph to capture calling context leads to an exponential growth in the computation. This paper presents a new algorithm that implicitly inlines functions at call sites …

Involving University Science Faculty In The Preparation Of Teachers: The Call And The Challenge Of Participation, Philip I. Kramer

Office of Academic Review and Curricular Advancement Staff Publications

No abstract provided.

Dynamic Modeling And Statistical Analysis Of Event Times, Edsel A. Pena

Faculty Publications

This review article provides an overview of recent work in the modeling and analysis of recurrent events arising in engineering, reliability, public health, biomedicine and other areas. Recurrent event modeling possesses unique facets making it different and more difficult to handle than single event settings. For instance, the impact of an increasing number of event occurrences needs to be taken into account, the effects of covariates should be considered, potential association among the interevent times within a unit cannot be ignored, and the effects of performed interventions after each event occurrence need to be factored in. A recent general class …

Complexity Leadership Theory: An Interactive Perspective On Leading In Complex Adaptive Systems, Benyamin B. Lichtenstein, Mary Uhl-Bien, Russ Marion, Anson Seers, James Douglas Orton, Craig Schreiber

Department of Management: Faculty Publications

Traditional, hierarchical views of leadership are less and less useful given the complexities of our modern world. Leadership theory must transition to new perspectives that account for the complex adaptive needs of organizations. In this paper, we propose that leadership (as opposed to leaders) can be seen as a complex dynamic process that emerges in the interactive “spaces between” people and ideas. That is, leadership is a dynamic that transcends the capabilities of individuals alone; it is the product of interaction, tension, and exchange rules governing changes in perceptions and understanding. We label this a dynamic of adaptive leadership, and …

Multi-User Uwb-Ir Systems With Interleaved Coding-Modulation On Multipath Fading Channels, Michal M. Pietrzyk, Keni Popovski, Tadeusz Wysocki, Beata J. Wysocki, Jos H. Weber

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

Interleaved coding-modulation (ICM) is a recently proposed method for ultra-wideband impulse radio (UWBIR) systems. ICM exploits the concept of chip interleaving, allowing to alleviate the problem of inter-symbol and inter-pulse interference commonly present in high data rate UWB-IR systems. In this paper, we extend previous work on ICM to scarcely populated multi-user scenarios. We propose a design of a deterministic chip interleaver based on time-hopping hyperbolic congruence sequences. We also review the main parameters of the random and hyperbolic interleavers. Our results indicate that the proposed type of interleaver yields similar performance to random interleavers but with the advantage of …

Fluorescence Polarization Of Helium Negative-Ion Resonances Excited By Polarized Electron Impact, J. W. Maseberg, Timothy J. Gay

Timothy J. Gay Publications

We have investigated helium (1s3d) ³D → (1s2p) ³P (588 nm) fluorescence produced by electron impact excitation in the vicinity of the (2s²2p) ²P and (2s2p²) ²D negative-ion resonances at 57.2 and 58.3 eV, respectively. In contrast to previous work, we use spin-polarized incident electrons and report the relative Stokes parameters P₁, P₂, and P₃ in the 55–60 eV region. Our failure to see discernable resonance effects in P₂ indicates that even though the lifetime of these resonances is significant (~10 fs), magnetic forces acting on …

Production Of Excited Atomic Hydrogen And Deuterium From H2 And D2 Photodissociation, J. D. Bozek, J. E. Furst, Timothy J. Gay, H. Gould, A. L. D. Kilcoyne, J. R. Machacek, F. Martin, K. W. Mclaughlin, J. L. Sanz-Vicario

Timothy J. Gay Publications

We have measured the production of both Lyα and Hα fluorescence from atomic H and D for the photodissociation of H₂ and D₂ by linearly polarized photons with energies between 24 and 60 eV. In this energy range, excited photofragments result primarily from the production of doubly excited molecular species which promptly autoionize or dissociate into two neutrals. Our data are compared with ab initio calculations of the dissociation process, in which both doubly excited state production and prompt ionization (non resonant) channels are considered. Agreement between our experimental data and that of earlier work, and with our …

Modeling Local Interest Points For Semantic Detection And Video Search At Trecvid 2006, Yu-Gang Jiang, Xiaoyong Wei, Chong-Wah Ngo, Hung-Khoon Tan, Wanlei Zhao, Xiao Wu

Research Collection School Of Computing and Information Systems

Local interest points (LIPs) and their features have been shown to obtain surprisingly good results in object detection and recognition. Its effectiveness and scalability, however, have not been seriously addressed in large-scale multimedia database, for instance TRECVID benchmark. The goal of our works is to investigate the role and performance of LIPs, when coupling with multi-modality features, for high-level feature extraction and automatic video search.

Integration Of Wikipedia And A Geography Digital Library, Ee Peng Lim, Zhe Wang, Darwin Sadeli, Yuanyuan Li, Chew-Hung Chang, Kalyani Chatterjea, Dion Hoe-Lian Goh, Yin-Leng Theng, Jun Zhang, Aixin Sun

Research Collection School Of Computing and Information Systems

In this paper, we address the problem of integrating Wikipedia, an online encyclopedia, and G-Portal, a web-based digital library, in the geography domain. The integration facilitates the sharing of data and services between the two web applications that are of great value in learning. We first present an overall system architecture for supporting such an integration and address the metadata extraction problem associated with it. In metadata extraction, we focus on extracting and constructing metadata for geo-political regions namely cities and countries. Some empirical performance results will be presented. The paper will also describe the adaptations of G-Portal and Wikipedia …

Preliminary Results Of A Nutrient Source Study In Wilgreen Lake, Madison County, Kentucky, Walter S. Borowski, Erin C. Jolly

EKU Faculty and Staff Scholarship

Wilgreen Lake (Madison County, Kentucky) is an eutrophic lake formed by damming Taylor Fork, part of the Silver Creek watershed. Two principal tributaries drain urban areas of the city of Richmond, agricultural land typified by cattle grazing, and a high-density residential area using septic systems. The lake is “nutrient impaired,” so it is likely that anthropogenic nutrient loading is affecting water quality. Our study aims to first characterize the physical characteristics and water quality of the lake (2006), and then determine the specific proportion of nutrient inputs (2007) to the lake with the aim of remediating any possible degradation of …

Robust Controllability In Temporal Constraint Networks Under Uncertainty, Hoong Chuin Lau, Jia Li, Roland H. C. Yap

Research Collection School Of Computing and Information Systems

Temporal constraint networks are embedded in many planning and scheduling problems. In dynamic problems, a fundamental challenge is to decide whether such a network can be executed as uncertainty is revealed over time. Very little work in this domain has been done in the probabilistic context. In this paper, we propose a Temporal Constraint Network (TCN) model where durations of uncertain activities are represented by random variables. We wish to know whether such a network is robust controllable, i.e. can be executed dynamically within a given failure probability, and if so, how one might find a feasible schedule as the …

Dcma: A Label-Switching Mac For Efficient Packet Forwarding In Multi-Hop Wireless Networks, Arup Acharya, Sachin Ganu, Archan Misra

Research Collection School Of Computing and Information Systems

This paper addresses the problem of efficient packet forwarding in a multihop, wireless "mesh" network. We present an efficient interface contained forwarding (ICF) architecture for a "wireless router," i.e., a forwarding node with a single wireless network interface card (NIC) in a multihop wireless network that allows a packet to be forwarded entirely within the NIC of the forwarding node without requiring per-packet intervention by the node's CPU. To effectively forward packets in a pipelined fashion without incurring the 802.11-related overheads of multiple independent channel accesses, we specify a slightly modified version of the 802.11 MAC, called data driven cut-through …

A Model For Anticipatory Event Detection, Qi He, Kuiyu Chang, Ee Peng Lim

Research Collection School Of Computing and Information Systems

Event detection is a very important area of research that discovers new events reported in a stream of text documents. Previous research in event detection has largely focused on finding the first story and tracking the events of a specific topic. A topic is simply a set of related events defined by user supplied keywords with no associated semantics and little domain knowledge. We therefore introduce the Anticipatory Event Detection (AED) problem: given some user preferred event transition in a topic, detect the occurence of the transition for the stream of news covering the topic. We confine the events to …

Smartic: Towards Building An Accurate, Robust And Scalable Specification Miner, David Lo, Siau-Cheng Khoo

Research Collection School Of Computing and Information Systems

Improper management of software evolution, compounded by imprecise, and changing requirements, along with the “short time to market ” requirement, commonly leads to a lack of up-to-date specifications. This can result in software that is characterized by bugs, anomalies and even security threats. Software specification mining is a new technique to address this concern by inferring specifications automatically. In this paper, we propose a novel API specification mining architecture called SMArTIC (Specification Mining Architecture with Trace fIltering and Clustering) to improve the accuracy, robustness and scalability of specification miners. This architecture is constructed based on two hypotheses: (1) Erroneous traces …

Lsuhsc Facilities Daily Update: November 2006, Lsuhsc Property And Facilities Management

LSUHSC Facilities Daily Updates: 2006

LSUHSC Dailly Facilities Updates from November 2006.

These updates describe damage and a timeline of repairs at the LSU Health Sciences Center - New Orleans campus due to Hurricane Katrina which made landfall August 29, 2005.

Insurers, Illusions Of Judgment & Litigation, Chris Guthrie, Jeffrey J. Rachlinski

Vanderbilt Law School Faculty Publications

Insurers play a critical role in the civil justice system. By providing liability insurance to parties who would otherwise be untenable as defendants, insurers make litigation possible. Once litigation materializes, insurers provide representation, pay legal fees, and often play a central role in resolving disputes through settlement or adjudication. In this paper, we explore empirically how these key litigation players make important decisions in the litigation process, like evaluating a case, deciding whether to settle, and if so, on what terms. We find that insurers, though not entirely immune to the effects of cognitive illusions that have been shown to …

Adolescents' Perceptions And Interpretations Of Parental Control: Differentiated By Domain And Type Of Control, Fumiko Kakihara

Student Work

In this study, early to middle adolescents’ perceptions and interpretations of psychological control and behavioral control were examined using quasi-experimental methods. A total of sixty-seven adolescents (M—14.25 years, SD = 1.66), consisting of 32 7th/8th graders (M= 12.69 years, SD = .69) and 35 10th/11th graders (M = 15.69 years, SD= .72) responded to hypothetical vignettes depicting everyday interactions between parents and an adolescent involving psychological versus behavioral control, manipulating the levels of control and authority domains. The adolescents were asked to indicate the degree to which the control depicted in the vignettes would indicate parental intrusiveness, their mattering to …

Submicrosecond Dynamics Of Water Explosive Boiling And Lift-Off From Laser-Heated Silicon Surfaces, S. I. Kudryashov, S. D. Allen

Mechanical Engineering - Daytona Beach

Explosive boiling and lift-off of a thin layer of micron-sized transparent water droplets from an absorbing Si substrate heated by a nanosecond KrF laser were studied using a contact photoacoustic technique. The compressive photoacoustic response increases steeply to an asymptotic value on the order of the water critical pressure starting at a threshold laser fluence of 0.20 J cm2, where lift-off of the water layer also occurs. Above this threshold, several reproducible discrete multimegahertz components are revealed in Fourier spectra of the acoustic transients, corresponding to nanosecond oscillations of steam bubbles inside the water droplets on the microsecond time scale …

Regarding Software As A Material Of Design, E. Blevis, Y.K. Lim, E. Stolterman

DRS Biennial Conference Series

We discuss the idea that software can be considered to be a material of design—an idea introduced in Löwgren & Stolterman’s recent book, “Thoughtful Interaction Design.” We discuss the implications of this idea for regarding software design to be a design discipline within design traditions. In order to characterize this way of thinking and give it some utility, we propose a paradigm for regarding software as a material of design that we call the SoftMat paradigm. We describe a framework for characterizing philosophical viewpoints about design that informs the SoftMat paradigm and that we call VMR—for values, methods, and reasoning. …

How To Develop Basic Research In Communication Design, P.K. Storkerson

DRS Biennial Conference Series

As a matter of competence and legitimacy, Communication design needs the grounding and knowledge that come from basic research. One of the major impediments to basic research in communication design is the lack of theoretical frames by which to apprehend and isolate valid, significant research questions and define research methods. This paper explicates these problems and proposes solutions by outlining a process of defining theory and method and by proposing a specific ontological and epistemological frame within which to conduct research in communication design.

A Note On The Engulfing Property And The R 1+Α -Regularity Of Convex Functions In Carnot Groups, Luca Capogna, Diego Maldonado

Mathematics Sciences: Faculty Publications

We study the engulfing property for convex functions in Carnot groups. As an application we show that the horizontal gradient of functions with this property is Hölder continuous.

Designing Engineering Education; Development Of Design Education Model For Engineers, Jihoon Kim, Myung-Suk Kim

DRS Biennial Conference Series

This research focuses on development of model used in teaching ‘Design Thinking’ to students majoring in engineering with emphasis on creative ideation and expression, and its application examples. Following the Second World War, educational circles in the area of engineering, due to excessive influence of Engineering Science, have come to concentrate relatively more on analysis of phenomenon and theoretical research rather than traditional format of engineering education, which places importance on visual thinking and actual experience, in development of curriculum. This research presents the process of development of new educational model in order to introduce core educational program of design …

A Proposal Of Design Method Based On Hierarchical Design Model And An Application For Automotive Seat Designs, Y Nomura, Y Ujiie, Y Matsuoka

DRS Biennial Conference Series

In the early process of design where a conceptual design and a basic design are done, a structural model is often used by designers. On the other hand, in the late process of design where a detailed design is done, a mathematical model is often used by engineers. In the conventional studies, a design method that has an ability to support the building of both models has not been proposed. In this study, the Hierarchical Design Model proposed by Matsuoka was paid attention to. Firstly, the Hierarchical QFD that reflects the features of Hierarchical Design Model has been expanded into …

Worldviews For Design Theory, P. Galle

DRS Biennial Conference Series

I suspect that the growing ‘body’ of design theory may be infected by more inconsistency than is justifiable by genuine disagreement among design researchers. Taking my clue from Peirce, who argued that theory inevitably rests on basic metaphysical assumptions that theorists ought to be critically aware of, I demonstrate how ‘insidious inconsistency’ may infect design theory if we ignore this admonition. As a possible remedy, I propose a method by which the philosophy of design may develop sound metaphysical foundations (‘worldviews’) for design theory – and obtain philosophical insights into design as a valuable side effect.

Design, Knowledge And Human Interests, C Dilnot

DRS Biennial Conference Series

No abstract provided.

Teaching Interaction Design: Matters, Materials And Means, S Lundgren, O Torgersson, L Hallnäs, P Ljungstrand, E Eriksson

DRS Biennial Conference Series

The designer works with people, with materials, with products. Designers are seen as people concerned with form, function and surface. But how often is the designer associated with technology? Still programming can be just as a creative activity as drawing. Deriving from experiences from the discipline of Interaction Design, we advocate a wider view on what a designer is and does by describing how we treat computational technology as any other design material and how we train engineering students and others into becoming designers in a technology-oriented environment. Our method to create an education in applied Interaction Design lends ideas …

A New Look At Design Thinking: Research In Progress, Rob Cowdroy, Michael Ostwald, Anthony Williams

DRS Biennial Conference Series

This paper reports on work in progress in a programme of highly innovative cross-disciplinary collaborative research into design thinking. This research programme departs from current reductivist theoretical approaches to design including computational and neuroscience models; instead the programme uses empirical methods from behavioural and cognitive psychology, social anthropology and neuropsychology to study elite designers at work. Designers are usually characterised as creative individuals who work alone and autonomously, and design education is almost universally oriented accordingly. In practice, however, designers also typically work in two other key environments: in design teams and in interaction with computers in CAD environments. Pilot …