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2007

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Articles 4261 - 4290 of 6758

Full-Text Articles in Physical Sciences and Mathematics

Effects Of Fire Severity And Distance From Unburned Edge On Mammalian Community Post-Fire Recovery, Jay Diffendorfer, Wayne Spencer, Scott Tremor, Jan Beyers Jan 2007

Effects Of Fire Severity And Distance From Unburned Edge On Mammalian Community Post-Fire Recovery, Jay Diffendorfer, Wayne Spencer, Scott Tremor, Jan Beyers

JFSP Research Project Reports

This final report summarizes key findings relative to the five major objectives listed in our proposal, along with the crosswalk of accomplished and future deliverables. Additional details concerning objectives, methods, results, and recommendations are presented in Attachment A. Each of our major objectives is listed below with a brief summary of findings to date. Because we only recently finished the final session of data collection, all findings are preliminary and may change as more comprehensive statistical analyses are completed. 1. Evaluate the effects of fire on southern California rodent, large mammal, and bat diversity and study patterns of post fire …


Effects Of Fuel Treatments And Wildfire On The Avifauna Of The Pine Rockland Ecosystem In Southern Florida., John D. Lloyd, Gary L. Slater, Skip Snow, James R. Snyder Jan 2007

Effects Of Fuel Treatments And Wildfire On The Avifauna Of The Pine Rockland Ecosystem In Southern Florida., John D. Lloyd, Gary L. Slater, Skip Snow, James R. Snyder

JFSP Research Project Reports

The response of plants and animals in the pine forests of southern Florida to variation in fire and hydrological regimes remains inadequately described, hindering the ability of resource managers to manipulate fire and water to achieve desired ecological outcomes. In this study, we took advantage of natural variation in two measures of fire history (the number of days since last fire and the number of times an area had been burned during the previous ten years) and one measure of hydrology (water table elevation) to explore how plants, breeding birds, and wintering birds in slash-pine (Pinus elliottii var. densa) forests …


Fuels Reduction In A Western Coniferous Forest: Effects On Two Sympatric Ungulates And Their Habitat, Ryan A. Long, Janet Rachlow, Marty Vavra, John G. Kie Jan 2007

Fuels Reduction In A Western Coniferous Forest: Effects On Two Sympatric Ungulates And Their Habitat, Ryan A. Long, Janet Rachlow, Marty Vavra, John G. Kie

JFSP Research Project Reports

We evaluated effects of an experimental fuels reduction program on elk, mule deer, and their habitat at the Starkey Experimental Forest and Range (Starkey) in northeastern Oregon. From 2001 to 2003, 26 stands of true fir and Douglas-fir that suffered high rates of mortality from an outbreak of spruce budworm were selectively thinned (spring or summer) and burned (fall) while 27 similar stands were left untreated to serve as experimental controls. We used location data for elk and mule deer collected during spring (1 April–14 June) and summer (15 June–31 August) of 1999–2006 to compare use of treated and untreated …


Covering Properties And Cohen Forcing, Akira Iwasa Jan 2007

Covering Properties And Cohen Forcing, Akira Iwasa

Faculty Publications

We will show that adding Cohen reals preserves the covering property that every open cover has a σ-P Q refinement and deduce that adding Cohen reals preserves covering properties such as paracompactness, subparacompactness and screenability.


El Mundo Entero Es Nuestro Bosque: Política Forestal Y Cooperación Internacional, Pablo Martínez De Anguita Jan 2007

El Mundo Entero Es Nuestro Bosque: Política Forestal Y Cooperación Internacional, Pablo Martínez De Anguita

Yale School of the Environment Bulletin Series

No abstract provided.


Professional Ethics For Natural Resource And Environmental Managers: A Primer, Lloyd C. Irland Jan 2007

Professional Ethics For Natural Resource And Environmental Managers: A Primer, Lloyd C. Irland

Yale School of the Environment Publications Series

No abstract provided.


Diversity And The Future Of The U.S. Environmental Movement, Emily Enderle Jan 2007

Diversity And The Future Of The U.S. Environmental Movement, Emily Enderle

Yale School of the Environment Publications Series

No abstract provided.


How Can Conservation Help? Using Land Conservation To Address Other Economic And Social Issues, Bradford S. Gentry Jan 2007

How Can Conservation Help? Using Land Conservation To Address Other Economic And Social Issues, Bradford S. Gentry

Yale School of the Environment Publications Series

2007 Berkely Workshop Summary and Background Materials

Pocantico Conference Center, Tarrytown, New York, June 8-10, 2007 Hosted by the Land Trust Alliance and the Yale School of Forestry & Environmental Studies


A Distributed Parabolic Control With Mixed Boundary Conditions, Jose-Luis Menaldi, Domingo Alberto Tarzia Jan 2007

A Distributed Parabolic Control With Mixed Boundary Conditions, Jose-Luis Menaldi, Domingo Alberto Tarzia

Mathematics Faculty Research Publications

We study the asymptotic behavior of an optimal distributed control problem where the state is given by the heat equation with mixed boundary conditions. The parameter α intervenes in the Robin boundary condition and it represents the heat transfer coefficient on a portion Γ1 of the boundary of a given regular n-dimensional domain. For each α, the distributed parabolic control problem optimizes the internal energy g. It is proven that the optimal control ĝα with optimal state uĝαα and optimal adjoint state pĝαα are convergent as α → 1 …


Green And Poisson Functions With Wentzell Boundary Conditions, José-Luis Menaldi, Luciano Tubaro Jan 2007

Green And Poisson Functions With Wentzell Boundary Conditions, José-Luis Menaldi, Luciano Tubaro

Mathematics Faculty Research Publications

We discuss the construction and estimates of the Green and Poisson functions associated with a parabolic second order integro-di erential operator with Wentzell boundary conditions.


Characteristics Of Facilities With Specialized Programming For Drinking Drivers And For Other Criminal Justice Involved Clients: Analysis Of A National Database, Cynthia L. Arfken, Sheryl Kubiak Jan 2007

Characteristics Of Facilities With Specialized Programming For Drinking Drivers And For Other Criminal Justice Involved Clients: Analysis Of A National Database, Cynthia L. Arfken, Sheryl Kubiak

Wayne State University Associated BioMed Central Scholarship

Abstract

Background

Offering specialized programming at substance abuse treatment facilities can help diversify clientele and funding sources, potentially enhancing the facilities' ability to survive and/or expand. Past research has shown that facilities only offering specialized programming for driving under the influence/driving while intoxicated offenders (DUI) are predominately private-for-profit owned. As criminal justice populations, both DUI and other criminal justice offenders, comprise a large proportion of those in community-based substance abuse treatment knowing facilities' characteristics would be important for administrators and policymakers to consider when updating programming, training staff or expanding capacity to ensure efficient use of scarce resources. However, while …


Modeling Immune Response To Bacterial Infection, Carla Roth Jan 2007

Modeling Immune Response To Bacterial Infection, Carla Roth

The Journal of Undergraduate Research

Mathematical models have begun to play an important role in the study of biology. We will examine this role further by analyzing a specific model of the innate immune system's response to a bacterial infection. Beginning with the biological background of the model, we will move into an explanation of a specific model of this situation followed by a critique of the model and future work to be done with the topic.


Discrete Approximations, Relaxation, And Optimization Of One-Sided Lipschitzian Differential Inclusions In Hilbert Spaces, Tzanko Donchev, Elza Farkhi, Boris S. Mordukhovich Jan 2007

Discrete Approximations, Relaxation, And Optimization Of One-Sided Lipschitzian Differential Inclusions In Hilbert Spaces, Tzanko Donchev, Elza Farkhi, Boris S. Mordukhovich

Mathematics Research Reports

We study discrete approximations of nonconvex differential inclusions in Hilbert spaces and dynamic optimization/optimal control problems involving such differential inclusions and their discrete approximations. The underlying feature of the problems under consideration is a modi- fied one-sided Lipschitz condition imposed on the right-hand side (i.e., on the velocity sets) of the differential inclusion, which is a significant improvement of the conventional Lipschitz continuity. Our main attention is paid to establishing efficient conditions that ensure the strong approximation (in the W^1,p-norm as p greater than or equal to 1) of feasible trajectories for the one-sided Lipschitzian differential inclusions under. consideration by …


Inversion For Non-Smooth Models With Physical Bounds, Partha S. Routh, Leming Qu, Mrinal K. Sen, Phil D. Anno Jan 2007

Inversion For Non-Smooth Models With Physical Bounds, Partha S. Routh, Leming Qu, Mrinal K. Sen, Phil D. Anno

Mathematics Faculty Publications and Presentations

Geological processes produce structures at multiple scales. A discontinuity in the subsurface can occur due to layering, tectonic activities such as faulting, folding and fractures. Traditional approaches to invert geophysical data employ smoothness constraints. Such methods produce smooth models and thefore sharp contrasts in the medium such as lithological boundaries are not easily discernible. The methods that are able to produce non-smooth models, can help interpret the geological discontinuity. In this paper we examine various approaches to obtain non-smooth models from a finite set of noisy data. Broadly they can be categorized into approaches: (1) imposing non-smooth regularization in the …


On The Cover Jan 2007

On The Cover

Sci-Tech News

No abstract provided.


Engineering Division, Bob Tolliver Jan 2007

Engineering Division, Bob Tolliver

Sci-Tech News

No abstract provided.


Science-Technology Division, Ann Koopman Jan 2007

Science-Technology Division, Ann Koopman

Sci-Tech News

No abstract provided.


Sase: Complex Event Processing Over Streams, Yanlei Diao, Patrick Stahlberg, Gordon Anderson Jan 2007

Sase: Complex Event Processing Over Streams, Yanlei Diao, Patrick Stahlberg, Gordon Anderson

Yanlei Diao

RFID technology is gaining adoption on an increasing scale for tracking and monitoring purposes. Wide deployments of RFID devices will soon generate an unprecedented volume of data. Emerging applications require the RFID data to be filtered and correlated for complex pattern detection and transformed to events that provide meaningful, actionable information to end applications. In this work, we design and develop SASE, a complex event processing system that performs such datainformation transformations over real-time streams. We design a complex event language for specifying application logic for such transformation, devise new query processing techniques to efficiently implement the language, and develop …


Multi-Agent System That Attains Longevity Via Death, Megan Olsen, Hava Siegelmann Jan 2007

Multi-Agent System That Attains Longevity Via Death, Megan Olsen, Hava Siegelmann

Hava Siegelmann

We propose a novel approach to self-regenerating systems which require continuous operation, such as security surveillance. For that aim we introduce HADES, a self-regenerating cooperative multi-agent system with local monitoring. When agents of HADES find local failures they repair them. However, in extreme cases repair may not be possible and irregular aggressive agents will multiply. These irregular agents may use all of the system’s resources and thus take over the system. To optimize system longevity, we identify protocols for killing these irregular agents. Our primary contribution is a double communication protocol of alert and death signals among the agents, making …


The Effect Of Nanoparticle Shape On Polymer-Nanocomposite Rheology And Tensile Strength, Scott Knauert, Jack Douglas, Francis Starr Jan 2007

The Effect Of Nanoparticle Shape On Polymer-Nanocomposite Rheology And Tensile Strength, Scott Knauert, Jack Douglas, Francis Starr

Francis Starr

No abstract provided.


Breakdown Of The Stokes-Einstein Relation In Supercooled Water, P. Kumar, S. Buldyrev, S. Becker, P. Poole, Francis Starr, H. Stanley Jan 2007

Breakdown Of The Stokes-Einstein Relation In Supercooled Water, P. Kumar, S. Buldyrev, S. Becker, P. Poole, Francis Starr, H. Stanley

Francis Starr

No abstract provided.


A Lookup And Reference Tool For Pulmonary Computed Tomography Nodules, Tim Disney, Michael O. Lam, Daniela S. Raicu, Jacob Furst, David S. Channin Jan 2007

A Lookup And Reference Tool For Pulmonary Computed Tomography Nodules, Tim Disney, Michael O. Lam, Daniela S. Raicu, Jacob Furst, David S. Channin

Michael O Lam

No abstract provided.


Optimized Parallel Implementation Of The Quadratic Sieve Factorization Algorithm, Andrew G. West Jan 2007

Optimized Parallel Implementation Of The Quadratic Sieve Factorization Algorithm, Andrew G. West

Andrew G. West

No abstract provided.


Wpływ Dużej Spalarni Odpadów Przemysłowych I Niebezpiecznych Na Jakość Powietrza, Robert Oleniacz, Lidia Rusztowicz Jan 2007

Wpływ Dużej Spalarni Odpadów Przemysłowych I Niebezpiecznych Na Jakość Powietrza, Robert Oleniacz, Lidia Rusztowicz

Robert Oleniacz

Waste incineration causes unavoidable pollutant emissions to atmosphere and thus negative impact on air quality, but scale of the influence is often exaggerated. In the paper computation results of the atmospheric dispersion of pollutants were presented for one of the largest industrial and hazardous waste incineration plant existing in Poland (processing capacity: 3 ton per hour). These results confirm the fact that the incinerator meets the requirements of best available techniques (BAT) for the waste incineration and its impact on air quality is relatively small. This effect is caused mainly by proper operation of the rotary kiln incinerator, high efficiency …


Analiza Wpływu Planowanego Zakładu Termicznego Przekształcania Odpadów Komunalnych Na Jakość Powietrza W Krakowie, Robert Oleniacz, Maria Pilch Jan 2007

Analiza Wpływu Planowanego Zakładu Termicznego Przekształcania Odpadów Komunalnych Na Jakość Powietrza W Krakowie, Robert Oleniacz, Maria Pilch

Robert Oleniacz

Construction of the Municipal Solid Waste Incineration (MSWI) plant is considered optimal in the Programme of Management of Solid Waste in Krakow as well as in proposed scenarios of Municipal Waste Management. Evaluation of impact of the incineration plant with a capacity of 255000 tons per year on air quality in Krakow is presented in this work. The evaluation is based on assumption that air pollutant emissions from the incinerator will be at the highest allowed level resulting from emission limit values for waste incineration plants with operation time each of two planned lines 7500 hours per year. Calculation results …


Newton's Method For Solving A System Of Dual Fuzzy Nonlinear Equations, Saeid Abbasbandy Jan 2007

Newton's Method For Solving A System Of Dual Fuzzy Nonlinear Equations, Saeid Abbasbandy

Saeid Abbasbandy

In this paper, we propose a numerical solution for a system of dual fuzzy nonlinear equations by Newton’s method. The fuzzy quantities are presented in parametric form. Some numerical illustrations are given to show the efficiency of algorithm.


Ontology Development For Context-Sensitive Decision Support, Shah Jahan Miah Jan 2007

Ontology Development For Context-Sensitive Decision Support, Shah Jahan Miah

Dr Shah Jahan Miah

Semantics have become acceptable techniques for data integration, data interoperability and data visualization in many software engineering domains and web developments over the past few years. This paper describes a software development where semantic ontology techniques have been used for developing a generic knowledge model applicable across rural industries. This technique enables us to outline a single access point for building end-user specific knowledge based systems. We have called the new solution prototype an End-User Enabled Design Environment (EUEDE) where the knowledge components from the problem ontology is used in building specific decision systems that are contextsensitive to end-user factors. …


Actors, Objects, Contextures, Morphograms, Rudolf Kaehr Jan 2007

Actors, Objects, Contextures, Morphograms, Rudolf Kaehr

Rudolf Kaehr

Systematic and historic overview and critics of actor and object oriented programming.


From Dialogues To Polylogues, Rudolf Kaehr Jan 2007

From Dialogues To Polylogues, Rudolf Kaehr

Rudolf Kaehr

No abstract provided.


Why Manage Terminology? Ten Quick Answers, Uwe Muegge Jan 2007

Why Manage Terminology? Ten Quick Answers, Uwe Muegge

Uwe Muegge

Terminology management is a hot topic these days. At the tcworld conference 2006, terminology had its own forum with hundreds of participants. And a number of highly visible institutions like the LISA Terminology Special Interest Group (SIG) has been evangelizing the development and use of standardized terminology in the business world for many years.