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Constraint Answer Set Programming, Yuliya Lierler Sep 2012

Constraint Answer Set Programming, Yuliya Lierler

Computer Science Faculty Publications

Constraint answer set programming (CASP) is a novel, promising direction of research whose roots go back to propositional satisfiability (SAT). SAT solvers are efficient tools for solving boolean constraint satisfaction problems that arise in different areas of computer science, including software and hardware verification. Some constraints are more naturally expressed by non-boolean constructs. Satisfiability modulo theories (SMT) extends boolean satisfiability by the integration of non-boolean symbols defined by a background theory in another formalism, such as a constraint processing language. Answer set programming (ASP) extends computational methods of SAT in yet another way, inspired by ideas from knowledge representation, logic …

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The Tense-Op Syntagm: Unity To Nc Word Order, Evidence From Bulom, South Atlantic, George Tucker Childs Sep 2012

The Tense-Op Syntagm: Unity To Nc Word Order, Evidence From Bulom, South Atlantic, George Tucker Childs

Applied Linguistics Faculty Publications and Presentations

Provides the outline of a paper that examines Proto-Niger-Congo features; the classification of Atlantic languages; The VP in Bulom and Atlantic, TNS-OP; A contact explanation: S-AUX-O-V-X from Mande; Other explanations, internal to Bullom, internal to Atlantic, and elsewhere; and comparison to (speculations as to) reconstructed Niger-Congo.

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Non-Linearity Induced Weak Instrumentation, Ioannis Kasparis, Peter C.B. Phillips, Tassos Magdalinos Sep 2012

Non-Linearity Induced Weak Instrumentation, Ioannis Kasparis, Peter C.B. Phillips, Tassos Magdalinos

Cowles Foundation Discussion Papers

In regressions involving integrable functions we examine the limit properties of IV estimators that utilise integrable transformations of lagged regressors as instruments. The regressors can be either I(0) or nearly integrated (NI) processes. We show that this kind of nonlinearity in the regression function can significantly affect the relevance of the instruments. In particular, such instruments become weak when the signal of the regressor is strong, as it is in the NI case. Instruments based on integrable functions of lagged NI regressors display long range dependence and so remain relevant even at long lags, continuing to contribute to variance reduction …

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Automated Estimation Of Vector Error Correction Models, Zhipeng Liao, Peter C.B. Phillips Sep 2012

Automated Estimation Of Vector Error Correction Models, Zhipeng Liao, Peter C.B. Phillips

Cowles Foundation Discussion Papers

Model selection and associated issues of post-model selection inference present well known challenges in empirical econometric research. These modeling issues are manifest in all applied work but they are particularly acute in multivariate time series settings such as cointegrated systems where multiple interconnected decisions can materially affect the form of the model and its interpretation. In cointegrated system modeling, empirical estimation typically proceeds in a stepwise manner that involves the determination of cointegrating rank and autoregressive lag order in a reduced rank vector autoregression followed by estimation and inference. This paper proposes an automated approach to cointegrated system modeling that …

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Wages And Informality In Developing Countries, Costas Meghir, Renata Narita, Jean-Marc Robin Sep 2012

Wages And Informality In Developing Countries, Costas Meghir, Renata Narita, Jean-Marc Robin

Cowles Foundation Discussion Papers

It is often argued that informal labor markets in developing countries promote growth by reducing the impact of regulation. On the other hand informality may reduce the amount of social protection offered to workers. We extend the wage-posting framework of Burdett and Mortensen (1998) to allow heterogeneous firms to decide whether to locate in the formal or the informal sector, as well as set wages. Workers engage in both off the job and on the job search. We estimate the model using Brazilian micro data and evaluate the labor market and welfare effects of policies towards informality.

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The Strategic Impact Of Higher-Order Beliefs, Yi-Chun Chen, Alfredo Di Tillio, Eduardo Faingold, Siyang Xiong Sep 2012

The Strategic Impact Of Higher-Order Beliefs, Yi-Chun Chen, Alfredo Di Tillio, Eduardo Faingold, Siyang Xiong

Cowles Foundation Discussion Papers

Previous research has established that the predictions made by game theory about strategic behavior in incomplete information games are quite sensitive to the assumptions made about the players’ infinite hierarchies of beliefs. We evaluate the severity of this robustness problem by characterizing conditions on the primitives of the model — the players’ hierarchies of beliefs — for the strategic behavior of a given Harsanyi type to be approximated by the strategic behavior of (a sequence of) perturbed types. This amounts to providing characterizations of the strategic topologies of Dekel, Fudenberg, and Morris (2006) in terms of beliefs. We apply our …

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What Have They Been Thinking? Homebuyer Behavior In Hot And Cold Markets — A 2014 Update, Karl E. Case, Robert J. Shiller, Anne K. Thompson Sep 2012

What Have They Been Thinking? Homebuyer Behavior In Hot And Cold Markets — A 2014 Update, Karl E. Case, Robert J. Shiller, Anne K. Thompson

Cowles Foundation Discussion Papers

Questionnaire surveys undertaken in 1988 and annually from 2003 through 2014 of recent homebuyers in each of four U.S. metropolitan areas shed light on their expectations and reasons for buying during the recent housing boom and subsequent collapse. They also provide insight into the reasons for the housing crisis that initiated the current financial malaise. We find that homebuyers were generally well informed, and that their short-run expectations if anything underreacted to the year-to-year change in actual home prices. More of the root causes of the housing bubble can be seen in their long-term (10-year) home price expectations, which reached …

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Leverage And Default In Binomial Economies: A Complete Characterization, Ana Fostel, John Geanakoplos Sep 2012

Leverage And Default In Binomial Economies: A Complete Characterization, Ana Fostel, John Geanakoplos

Cowles Foundation Discussion Papers

Our paper provides a complete characterization of leverage and default in binomial economies with financial assets serving as collateral. Our Binomial No-Default Theorem states that any equilibrium is equivalent (in real allocations and prices) to another equilibrium in which there is no default. Thus actual default is irrelevant, though the potential for default drives the equilibrium and limits borrowing. This result is valid with arbitrary preferences and endowments, contingent or non-contingent promises, many assets and consumption goods, production, and multiple periods. We also show that no-default equilibria would be selected if there were the slightest cost of using collateral or …

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On Confidence Intervals For Autoregressive Roots And Predictive Regression, Peter C.B. Phillips Sep 2012

On Confidence Intervals For Autoregressive Roots And Predictive Regression, Peter C.B. Phillips

Cowles Foundation Discussion Papers

A prominent use of local to unity limit theory in applied work is the construction of confidence intervals for autogressive roots through inversion of the ADF t statistic associated with a unit root test, as suggested in Stock (1991). Such confidence intervals are valid when the true model has an autoregressive root that is local to unity (τ = 1 + ( c/n )) but are invalid at the limits of the domain of definition of the localizing coefficient c because of a failure in tightness and the escape of probability mass. Consideration of the boundary case shows that these …

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How To Milk An Almond, Stuff An Egg, And Armor A Turnip: A Thousand Years Of Recipes. By David Friedman And Elizabeth Cook., Ken Albala Sep 2012

How To Milk An Almond, Stuff An Egg, And Armor A Turnip: A Thousand Years Of Recipes. By David Friedman And Elizabeth Cook., Ken Albala

College of the Pacific Faculty Articles

No abstract provided.

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Reviewed Work: Sweet Invention: A History Of Dessert By Michael Krondl, Ken Albala Sep 2012

Reviewed Work: Sweet Invention: A History Of Dessert By Michael Krondl, Ken Albala

College of the Pacific Faculty Articles

No abstract provided.

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Mountain Monitor-2nd Quarter 2012, Mark Muro, Kenan Fikri Sep 2012

Mountain Monitor-2nd Quarter 2012, Mark Muro, Kenan Fikri

Mountain Monitor Quarterly

Data for the second quarter of 2012 reveal that the large metropolitan areas of the Mountain region were undergoing some of both the strongest and weakest economic recoveries in the nation—even as the pace of recovery across the region as a whole slackened. The result is a new geography. Crash-blasted Boise and Phoenix, along with Utah’s metropolitan areas, are now recovering relatively strongly while Colorado’s metropolitan areas and Albuquerque, Las Vegas, and Tucson struggle.

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General Aviation Weather Encounter Case Studies, John M. Lanicci, Massoud Bazargan, Daniel Halperin, Scott Shappell, Jaclyn Baron, Rebecca Iden, Carla Hackworth, Kali Holcomb Sep 2012

General Aviation Weather Encounter Case Studies, John M. Lanicci, Massoud Bazargan, Daniel Halperin, Scott Shappell, Jaclyn Baron, Rebecca Iden, Carla Hackworth, Kali Holcomb

School of Graduate Studies - Daytona Beach

This study presents a compilation of 24 cases involving general aviation (GA) pilots’ weather encounters over the continental U.S. The project team interviewed pilots who had experienced a weather encounter, and we examined their backgrounds, flight experience, and weather encounter details. Results from meteorological data analysis for each weather encounter were consistent with findings of larger GA weather accident studies in terms of the types of hazards encountered and flight phase during which the encounters occurred. Investigation of pilot weather products and the sources from which they were obtained revealed a lack of uniformity of pre-flight data sources and underutilization …

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Emotional Psychological And Related Problems Among Truant Youths: An Exploratory Latent Class Analysis, Richard Dembo, Rhissa Briones-Robinson, Rocío Aracelis Ungaro, Laura M. Gulledge, Lora M. Karas, Ken C. Winters, Steven Belenko, Paul Greenbaum Sep 2012

Emotional Psychological And Related Problems Among Truant Youths: An Exploratory Latent Class Analysis, Richard Dembo, Rhissa Briones-Robinson, Rocío Aracelis Ungaro, Laura M. Gulledge, Lora M. Karas, Ken C. Winters, Steven Belenko, Paul Greenbaum

Faculty Publications

Latent class analysis was conducted on the psychosocial problems experienced by truant youths. Data were obtained from baseline interviews completed on 131 youths and their parents/guardians involved in a NIDA-funded, Brief Intervention Project. Results identified two classes of youths: Class 1(n=9) - youths with low levels of delinquency, mental health and substance abuse issues; and Class 2(n=37) - youths with high levels of these problems. Comparison of these two classes on their urine analysis test results and parent/guardian reports of traumatic events found significant (p<.05) differences between them that were consistent with their problem group classification. Our results have important implications for research and practice.

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Supervisor Workplace Stress And Abusive Supervision: The Buffering Effect Of Exercise, James P. Burton, Jenny M. Hoobler, Melinda L. Scheuer Sep 2012

Supervisor Workplace Stress And Abusive Supervision: The Buffering Effect Of Exercise, James P. Burton, Jenny M. Hoobler, Melinda L. Scheuer

Faculty Articles, Papers, and Other Scholarship

Purpose We examine how supervisor stress is associated with employee-rated abusive supervision. In addition, we test the premise that higher levels of physical exercise by supervisors can buffer the negative effects of stress on their relationship with their subordinates. Design/Methodology/Approach A matched sample of 98 employed individuals and their direct supervisors was used to test our hypotheses. Findings Results suggest that increased levels of supervisor-reported stress are related to the increased experience of employee-rated abusive supervision. We also find that the relationship between supervisor stress and abusive behavior can be diminished when supervisors engage in moderate levels of physical exercise. …

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Measurement Of The Top-Quark Mass In Pp- Collisions Using Events With Two Leptons, David Hedin Sep 2012

Measurement Of The Top-Quark Mass In Pp- Collisions Using Events With Two Leptons, David Hedin

Faculty Articles, Papers, and Other Scholarship

We present a measurement of the top-quark mass (mt) in pp- collisions at √s=1.96TeV using tt- events with two leptons (ee, e μ, or μμ) and accompanying jets in 4.3 fb-1 of data collected with the D0 detector at the Fermilab Tevatron collider. We analyze the kinematically underconstrained dilepton events by integrating over their neutrino rapidity distributions. We reduce the dominant systematic uncertainties from the calibration of jet energy using a correction obtained from tt- events with a final state of a single lepton plus jets. We also correct jets in simulated events to replicate the quark flavor dependence of …

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Checkup, Lehigh Valley Health Network Sep 2012

Checkup, Lehigh Valley Health Network

Checkup

No abstract provided.

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Euscorpius Sicanus (Scorpiones: Euscorpiidae) From Tunisia: Dna Barcoding Confirms Ancient Disjunctions Across The Mediterranean Sea, Matthew R. Graham, Pavel Stoev, Nesrine Akkari, Gergin Blagoev, Victor Fet Sep 2012

Euscorpius Sicanus (Scorpiones: Euscorpiidae) From Tunisia: Dna Barcoding Confirms Ancient Disjunctions Across The Mediterranean Sea, Matthew R. Graham, Pavel Stoev, Nesrine Akkari, Gergin Blagoev, Victor Fet

Biological Sciences Faculty Research

We used a DNA barcoding marker (mitochondrial cox1) to investigate the controversial natural occurrence of Euscorpius sicanus (C.L. Koch) in North Africa. We tested this hypothesis by comparing a sample collected from a mountain in Tunisia to disjunct populations in Sardinia, Malta, and Greece. Using these samples, and a few additional Euscorpius spp. from southern Europe as outgroups, we reconstructed the maternal phylogeny. We then used a molecular clock to place the phylogeny in a temporal context. The Tunisian sample grouped closest to a specimen from Sardinia, with both being more distantly related to E. sicanus from Malta, which is …

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Patterns Of Beliefs, Attitudes, And Characteristics Of Teachers That Influence Computer Integration, Julie Mueller, Eileen Wood Sep 2012

Patterns Of Beliefs, Attitudes, And Characteristics Of Teachers That Influence Computer Integration, Julie Mueller, Eileen Wood

Education Faculty Publications

Despite continued acceleration of computer access in elementary and secondary schools, computer integration is not necessarily given as an everyday learning tool. A heterogeneous sample of 185 elementary and 204 secondary teachers was asked to respond to open-ended survey questions in order to understand why integration of computer-based technologies does or does not fit with their teaching philosophy, what factors impact planning to use computer technologies in the classroom, and what characteristics define excellent teachers who integrate technology. Qualitative analysis of open-ended questions indicated that, overall, educators are supportive of computer integration describing the potential of technology using constructivist language, …

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Environmental Aesthetics And Free Speech: Toward A Consistent Content Neutrality Standard For Outdoor Sign Regulation , Brian J. Connolly Sep 2012

Environmental Aesthetics And Free Speech: Toward A Consistent Content Neutrality Standard For Outdoor Sign Regulation , Brian J. Connolly

Michigan Journal of Environmental & Administrative Law

First Amendment challenges by billboard companies and other sign owners to local sign regulations have become a frequent occurrence in the past thirty years. The stakes are high for both commercial sign owners and local governments. Sign control has emerged as an important front in the environmental protection movement, as it focuses on the visual or scenic quality of the environment. Courts have begun to recognize and accept local governments’ interest in controlling the proliferation of signage as part of their efforts to improve environmental quality, but courts have applied First Amendment doctrine in an inconsistent manner. The courts’ inconsistent …

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Judicial Limitation Of The Epa's Oversight Authority In Clean Water Act Permitting Of Mountaintop Mining Valley Fills , Christopher D. Eaton Sep 2012

Judicial Limitation Of The Epa's Oversight Authority In Clean Water Act Permitting Of Mountaintop Mining Valley Fills , Christopher D. Eaton

Michigan Journal of Environmental & Administrative Law

Mountaintop removal mining operations in the Appalachian region have expanded significantly in recent decades. The practice decimates the mountain ecosystems by leveling forests, filling headwater streams, and producing significant runoff of heavy metals, sediment, and other pollutants that impair the aquatic environment of entire watersheds. Yet environmental permitting of the practice is relatively limited. A recent trend in litigation aimed at halting mining operations has involved challenging permits that authorize the discharge of mining overburden into headwater streams pursuant to the Clean Water Act (CWA). The Army Corps of Engineers has assumed jurisdiction over such discharges under section 404 of …

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Latinos (Research Report #115), Amanda D. Cawley, Mark J. Schafer, Troy Blanchard Sep 2012

Latinos (Research Report #115), Amanda D. Cawley, Mark J. Schafer, Troy Blanchard

LSU AgCenter Research Reports

This first review in this series focused on various racial and ethnic groups in the Gulf of Mexico region explores the experiences of Latinos -- a group that has gained significant local and national attention over the past 20 years as the number of Latinos residing in the area, and in the nation, has drastically increased.

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Electronic, Structural, And Elastic Properties Of Metal Nitrides Xn (X = Sc, Y): A First Principle Study, Chinedu E. Ekuma, Diola Bagayoko, Mark Jarrell, Juana Moreno Sep 2012

Electronic, Structural, And Elastic Properties Of Metal Nitrides Xn (X = Sc, Y): A First Principle Study, Chinedu E. Ekuma, Diola Bagayoko, Mark Jarrell, Juana Moreno

Faculty Publications

We utilized a simple, robust, first principle method, based on basis set optimization with the BZW-EF method, to study the electronic and related properties of transition metal mono-nitrides: ScN and YN. We solved the KS system of equations self-consistently within the linear combination of atomic orbitals (LCAO) formalism. It is shown that the band gap and low energy conduction bands, as well as elastic and structural properties, can be calculated with a reasonable accuracy when the LCAO formalism is used to obtain an optimal basis. Our calculated, indirect electronic band gap (E gΓ-X) is 0.79 (LDA) and 0.88 eV (GGA) …

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The Rapid Atmospheric Monitoring System Of The Pierre Auger Observatory, P. Abreu, M. Aglietta, M. Ahlers, E. J. Ahn, I. F.M. Albuquerque, D. Allard, I. Allekotte, J. Allen, P. Allison, A. Almela, J. Alvarez Castillo, J. Alvarez-Muñiz, R. Alves Batista, M. Ambrosio, A. Aminaei, L. Anchordoqui, S. Andringa, T. Antiči'c, C. Aramo, E. Arganda, F. Arqueros, H. Asorey, P. Assis, J. Aublin, M. Ave, M. Avenier, G. Avila, A. M. Badescu, M. Balzer, K. B. Barber, A. F. Barbosa, R. Bardenet, S. L.C. Barroso Sep 2012

The Rapid Atmospheric Monitoring System Of The Pierre Auger Observatory, P. Abreu, M. Aglietta, M. Ahlers, E. J. Ahn, I. F.M. Albuquerque, D. Allard, I. Allekotte, J. Allen, P. Allison, A. Almela, J. Alvarez Castillo, J. Alvarez-Muñiz, R. Alves Batista, M. Ambrosio, A. Aminaei, L. Anchordoqui, S. Andringa, T. Antiči'c, C. Aramo, E. Arganda, F. Arqueros, H. Asorey, P. Assis, J. Aublin, M. Ave, M. Avenier, G. Avila, A. M. Badescu, M. Balzer, K. B. Barber, A. F. Barbosa, R. Bardenet, S. L.C. Barroso

Faculty Publications

The Pierre Auger Observatory is a facility built to detect air showers produced by cosmic rays above 1017 eV. During clear nights with a low illuminated moon fraction, the UV fluorescence light produced by air showers is recorded by optical telescopes at the Observatory. To correct the observations for variations in atmospheric conditions, atmospheric monitoring is performed at regular intervals ranging from several minutes (for cloud identification) to several hours (for aerosol conditions) to several days (for vertical profiles of temperature, pressure, and humidity). In 2009, the monitoring program was upgraded to allow for additional targeted measurements of atmospheric conditions …

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Adipogenesis, Kelesha Sarjeant, Jacqueline M. Stephens Sep 2012

Adipogenesis, Kelesha Sarjeant, Jacqueline M. Stephens

Faculty Publications

Adipose tissue is an important site for lipid storage, energy homeostasis, and whole-body insulin sensitivity. It is important to understand the mechanisms involved in adipose tissue development and function, which can be regulated by the endocrine actions of various peptide and steroid hormones. Recent studies have revealed that white and brown adipocytes can be derived from distinct precursor cells. This review will focus on transcriptional control of adipogenesis and its regulation by several endocrine hormones. The general functions and cellular origins of adipose tissue and how the modulation of adipocyte development pertains to metabolic disease states will also be considered. …

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Dnt1 Acts As A Mitotic Inhibitor Of The Spindle Checkpoint Protein Dma1 In Fission Yeast, Yamei Wang, Wen Zhu Li, Alyssa E. Johnson, Zhou Qing Luo, Xue Li Sun, Anna Feoktistova, W. Hayes Mcdonald, Ian Mcleod, John R. Yates, Kathleen L. Gould, Dannel Mccollum, Quan Wen Jin Sep 2012

Dnt1 Acts As A Mitotic Inhibitor Of The Spindle Checkpoint Protein Dma1 In Fission Yeast, Yamei Wang, Wen Zhu Li, Alyssa E. Johnson, Zhou Qing Luo, Xue Li Sun, Anna Feoktistova, W. Hayes Mcdonald, Ian Mcleod, John R. Yates, Kathleen L. Gould, Dannel Mccollum, Quan Wen Jin

Faculty Publications

The Schizosaccharomyces pombe checkpoint protein Dma1 couples mitotic progression with cytokinesis and is important in delaying mitotic exit and cytokinesis when kinetochores are not properly attached to the mitotic spindle. Dma1 is a ubiquitin ligase and potential functional relative of the human tumor suppressor Chfr. Dma1 delays mitotic exit and cytokinesis by ubiquitinating a scaffold protein (Sid4) of the septation initiation network, which, in turn, antagonizes the ability of the Polo-like kinase Plo1 to promote cell division. Here we identify Dnt1 as a Dma1-binding protein. Several lines of evidence indicate that Dnt1 inhibits Dma1 function during metaphase. First, Dnt1 interacts …

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A Conserved Two-Component Regulatory System, Pids/Pidr, Globally Regulates Pigmentation And Virulence-Related Phenotypes Of Burkholderia Glumae, Hari Sharan Karki, Inderjit Kaur Barphagha, Jong Hyun Ham Sep 2012

A Conserved Two-Component Regulatory System, Pids/Pidr, Globally Regulates Pigmentation And Virulence-Related Phenotypes Of Burkholderia Glumae, Hari Sharan Karki, Inderjit Kaur Barphagha, Jong Hyun Ham

Faculty Publications

Burkholderia glumae is a rice pathogenic bacterium that causes bacterial panicle blight. Some strains of this pathogen produce dark brown pigments when grown on casamino-acid peptone glucose (CPG) agar medium. A pigment-positive and highly virulent strain of B.glumae, 411gr-6, was randomly mutagenized with mini-Tn5gus, and the resulting mini-Tn5gus derivatives showing altered pigmentation phenotypes were screened on CPG agar plates to identify the genetic elements governing the pigmentation of B.glumae. In this study, a novel two-component regulatory system (TCRS) composed of the PidS sensor histidine kinase and the PidR response regulator was identified as an essential regulatory factor for pigmentation. Notably, …

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Inferring The Evolutionary History Of Divergence Despite Gene Flow In A Lizard Species, Scincella Lateralis (Scincidae), Composed Of Cryptic Lineages, Nathan D. Jackson, Christopher C. Austin Sep 2012

Inferring The Evolutionary History Of Divergence Despite Gene Flow In A Lizard Species, Scincella Lateralis (Scincidae), Composed Of Cryptic Lineages, Nathan D. Jackson, Christopher C. Austin

Faculty Publications

Although recent radiations are fruitful for studying the process of speciation, they are difficult to characterize and require the use of multiple loci and analytical methods that account for processes such as gene flow and genetic drift. Using multilocus sequence data, we combine hierarchical cluster analysis, coalescent species tree inference, and isolation-with-migration analysis to investigate evolutionary relationships among cryptic lineages of North American ground skinks. We also estimate the extent that gene flow has accompanied or followed diversification, and also attempt to account for and minimize the influence of gene flow when reconstructing relationships. The data best support seven largely …

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An Estimate For Bounded Solutions Of The Hermite Heat Equation, Bishnu Prasad Dhungana Sep 2012

An Estimate For Bounded Solutions Of The Hermite Heat Equation, Bishnu Prasad Dhungana

Communications on Stochastic Analysis

No abstract provided.

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Large Non-Gaussian Halo Bias From Single Field Inflation, Ivan Agullo, Sarah Shandera Sep 2012

Large Non-Gaussian Halo Bias From Single Field Inflation, Ivan Agullo, Sarah Shandera

Faculty Publications

We calculate Large Scale Structure observables for non-Gaussianity arising from non-Bunch-Davies initial states in single field inflation. These scenarios can have substantial primordial non-Gaussianity from squeezed (but observable) momentum configurations. They generate a term in the halo bias that may be more strongly scale-dependent than the contribution from the local ansatz. We also discuss theoretical considerations required to generate an observable signature. © 2012 IOP Publishing Ltd and Sissa Medialab srl.

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