Physical Sciences and Mathematics Commons^™

Hrc Enews — 2010 Spring, Megan K. Svarz

Publications (HRC)

This issue contains staff accomplishments and announcements, event listings, a "new faces" listing for new staff, affiliates, and researchers, and an "of interest" section.

Mojave Applied Ecology Notes Spring 2010, Anna San, Donovan J. Craig, Lindsay P. Chiquoine, Scott R. Abella, E. Cayenne Engel, Christina L. Lund, Jessica E. Spencer, Edward P. Weber Ph.D, Jill E. Craig

Mojave Applied Ecology Notes

Seed removal rates of Sahara mustard by rodents and ants, Mojave Desert Network exotic invasive inventory, gypsum roadside disturbance restoration update, new paper out on post-fire plant establishment, UNLV establishes school of environmental and public affairs

Colorado College State Of The Rockies Report Card, Walter E. Hecox, Elizabeth L. Kolbe

Publications (SD)

Welcome to Colorado College’s seventh State of the Rockies Report Card. Building upon a strong start in 2004 and continuing each year since, the Rockies Project this year provides a fresh look, through thoughtful analysis, at a fundamental challenge to this beautiful but fragile region: maintaining the Rockies’ key roles in the nation’s food supply and vibrant agriculture. This Report Card and the companion series of 2009- 10 monthly State of the Rockies Food and Agriculture campus speakers are significant outreach activities of Colorado College: Vision 2010, an agenda to strengthen our college and our engagement in the region.

Optimal Matching Between Spatial Datasets Under Capacity Constraints, Hou U Leong, Kyriakos Mouratidis, Man Lung Yiu, Nikos Mamoulis

Research Collection School Of Computing and Information Systems

Consider a set of customers (e.g., WiFi receivers) and a set of service providers (e.g., wireless access points), where each provider has a capacity and the quality of service offered to its customers is anti-proportional to their distance. The capacity constrained assignment (CCA) is a matching between the two sets such that (i) each customer is assigned to at most one provider, (ii) every provider serves no more customers than its capacity, (iii) the maximum possible number of customers are served, and (iv) the sum of Euclidean distances within the assigned provider-customer pairs is minimized. Although max-flow algorithms are applicable …

Mining Diversity On Networks, Lu Liu, Feida Zhu, Chen Chen, Xifeng Yan, Jiawei Han, Philip Yu, Shiqiang Yang

Research Collection School Of Computing and Information Systems

Despite the recent emergence of many large-scale networks in different application domains, an important measure that captures a participant’s diversity in the network has been largely neglected in previous studies. Namely, diversity characterizes how diverse a given node connects with its peers. In this paper, we give a comprehensive study of this concept. We first lay out two criteria that capture the semantic meaning of diversity, and then propose a compliant definition which is simple enough to embed the idea. An efficient top-k diversity ranking algorithm is developed for computation on dynamic networks. Experiments on both synthetic and real datasets …

Playing With Recognizers: A Call For An Extensible Editor, Richard C. Davis

Research Collection School Of Computing and Information Systems

The sketch recognition interface community has not produced a -killer‖ application, because access to sketch recognition technology has been too restricted. If recognition technologies were more freely available for experimentation, powerful new applications would evolve. This paper proposes a rough architecture for an extensible graphical editor that facilitates collaboration between recognition technology developers, user interface designers, and early adopters of sketch recognition interfaces. Only by serving all three communities will we reach the critical mass necessary for killer applications to emerge.

Contributors’ Preference In Open Source Software Usability: An Empirical Study, Arif Raza, Luiz Fernando Capretz

Electrical and Computer Engineering Publications

The fact that the number of users of open source software (OSS) is practically un-limited and that ultimately the software quality is determined by end user’s experience, makes the usability an even more critical quality attribute than it is for proprietary software. With the sharp increase in use of open source projects by both individuals and organizations, the level of usability and related issues must be addressed more seriously. The research model of this empirical investigation studies and establishes the relationship between the key usability factors from contributors’ perspective and OSS usability. A data set of 78 OSS contributors that …

Developing A Data-Driven Classification Of South Florida Plant Communities, Jay P. Sah, Michael S. Ross, Susana Stofella

SERC Research Reports

A comprehensive, broadly accepted vegetation classification is important for ecosystem management, particularly for planning and monitoring. South Florida vegetation classification systems that are currently in use were largely arrived at subjectively and intuitively with the involvement of experienced botanical observers and ecologists, but with little support in terms of quantitative field data. The need to develop a field data-driven classification of South Florida vegetation that builds on the ecological organization has been recognized by the National Park Service and vegetation practitioners in the region. The present work, funded by the National Park Service Inventory and Monitoring Program - South Florida/Caribbean …

Hard X-Ray Emission From The Massive Star-Forming Region On 2: Discovery With Xmm-Newton., L. Oskinova, R. Gruendl, Richard Ignace, Y.-H. Chu, W.-R. Hamann, A. Feldmeier

ETSU Faculty Works

We obtained X-ray XMM-Newton observations of the open cluster Berkeley 87 and the massive star-forming region (SFR) ON 2. In addition, archival infrared Spitzer Space Telescope observations were used to study the morphology of ON 2, to uncover young stellar objects, and to investigate their relationship with the X-ray sources. It is likely that the SFR ON 2 and Berkeley 87 are at the same distance, 1.23 kpc, and hence are associated. The XMM-Newton observations detected X-rays from massive stars in Berkeley 87 as well as diffuse emission from the SFR ON 2. The two patches of diffuse X-ray emission …

The Elemental Composition And The Spatial Distributions Of Elements In The Crab Nebula, Timothy J. Satterfield

Physics & Astronomy Honors Theses

We present new observations and photoionization calculations for investigating gaseous regions that represent expected nuclear processing in the Crab Nebula supernova remnant. High helium abundance is shown to cause a very efficient [N II] ¸¸6548,6583 emitting zone which can account for some strong nitrogen emission. This high helium abundance causes strong emission of [C I] ¸¸9823,9850. When emission line measurements are compared with model simulations, most of the nebular gas appears to have depleted or solar nitrogen and enhanced carbon. This argues for a precursor star that had a mass greater than 9.5M¯. We also use images of selected emission …

Iowa Academy Of Science: The New Bulletin, V06n1, Spring 2010, Iowa Academy Of Science

New Bulletin

Inside This Issue:

--Message from the Executive Director

--Proposed Dues & Bylaws Changes

--Candidates for President-Elect

--Candidates for IAS Board of Directors

--Candidate for ISTS Section Vice Chair

-- Election 2010 Ballot

--Iowa Outdoor Youth Summit

--Graceland and Lamoni are Melting Pots of Tradition and Diversity in Southern Iowa

--Announcements, Events & Deadlines

--Gifts made to the Iowa Academy of Science in 2009

Eradicating Rats On Lehua Island, Hawaii, With The Help Of Gis And Gps, Justin W. Fischer, Peter Dunlevy

United States Department of Agriculture Wildlife Services: Staff Publications

Lehua Island is an uninhabited, 290-acre crescent-shaped volcanic cone located approximately 150 miles north-northwest of Honolulu, Hawaii, or approximately 20 miles west of the island of Kauai. Lehua is a state-designated seabird sanctuary managed by the Hawaii Department of Land and Natural Resources (HIDLNR) and federally owned by the U.S. Coast Guard. Renowned for its diversity of nesting seabirds, it is home to at least 17 recorded species of seabirds, including, but not limited to, colonies of Laysan and black-footed albatross, red-footed and brown boobies, black noddies, and Newell's shearwaters. Lehua is also home to several species of native coastal …

Visitation To Cottonseed Storage Sites By Feral Swine And Evidence Of Gossypol Exposure, Tyler A. Campbell, Sarah Bullock, David B. Long, David G. Hewitt, Michael Dowd

United States Department of Agriculture Wildlife Services: Staff Publications

Texas ranks first in U.S. cotton production, and southern Texas is a major region of production within the state. Within Kleberg County, for example, approximately 16,147 ha are planted in cotton annually, yielding approximately 68,200 bales, or 15,467 metric tons, of cotton (U.S. Department of Agriculture [USDA] 2009). Cotton producers have discovered new uses for cotton ginned by-products, such as hydro-mulch (Holt et al. 2005) used as a protein supplement for range livestock (DelCurto et al. 2000) and white-tailed deer (Odocoileus virginianus; Cooper 2006). Because of this, much of the materials are temporarily stored for later use.

European Starling Preferences For Bait Substrates Used In Drc-1339 Applications, H. Jeffrey Usda-Aphis-Wildlife Services, George M. Linz, Scott F. Beckerman, Anthony Duffiney, Thomas Halstead

United States Department of Agriculture Wildlife Services: Staff Publications

Additional bait substrates for the avicide, DRC-1339 Concentrate (3-chloro-4- methylaniline hydrochloride), could provide USDA/Wildlife Services with more flexibility when managing nuisance populations of European starlings (Sturnus vulgaris) at livestock facilities. From January 11 to 21, 2008, we conducted 11 2-choice preference tests with 6 bait types at a feedlot in central Kansas. The baits included cracked corn mixed with lard (2 concentrations), 2 forms of distiller’s grain (wet powder and pellets), 2 types of livestock feed (calf-starter pellet and sweet-feed mix), and a custom-produced poultry pellet (carrier pellet) made by USDA specifically for baiting starlings. We evaluated bait …

Livestock Protection Dogs In The 21st Century: Is An Ancient Tool Relevant To Modern Conservation Challenges?, Thomas M. Gehring, Kurt C. Vercauteren, Jean-Marc Landry

United States Department of Agriculture Wildlife Services: Staff Publications

Europe and North America share a similar history in the extirpation and subsequent recovery of large carnivore and ungulate species. Both continents face challenges and opportunities for managing human-wildlife conflict at the junction of livestock production and wildlife conservation. Predation of livestock and disease transmission between wildlife and livestock is an ongoing and escalating worldwide issue. In order to manage this conflict, producers need effective tools, and they have used livestock protection dogs (LPDs) for reducing predation for well over 2000 years. We review the history of the use of LPDs, including the loss of information on their use and …

Eradicating Rats On Lehua Island, Hawaii, With The Help Of Gis And Gps, Justin W. Fischer, Peter Dunlevy

United States Department of Agriculture Wildlife Services: Staff Publications

Highlights

• Wildlife Services used GIS and GPS to document and track bait distribution during each bait drop.
• GIS and GPS were critical in making this eradication project effective and environmentally safe.
• Use of the technologies ensured the coverage necessary for the project's goals.

Effects Of Aquaculture On Migration And Movement Patterns Of Double-Crested Cormorants, D. Tommy King, Bradley F. Blackwell, Brian S. Dorr

United States Department of Agriculture Wildlife Services: Staff Publications

We analyzed 10,620 recovery records for double-crested cormorants (Phalacrocorax auritus) banded as nestlings from 1923 to 2006 to determine the population’s age structure, migration routes, dispersal patterns, and the possible influence of the expansion of the aquaculture industry in the southeastern United States on these population characteristics. Ninety-nine percent of the birds were banded during June to August, and 78% were banded as pre-fl edged birds. Cormorants banded in the interior region of the United States comprised 91% of all birds banded from 1955 to 2006; these birds wintered primarily in the Lower Mississippi Valley and the northern …

Analysis Of Boolean Functions With High Second Order Nonlinearity, Corneliu A. Bodea

Honors Theses

Highly nonlinear Boolean functions play a central role in the design and security analysis of high speed stream cyphers and block cyphers. We focus on analyzing the structure of Boolean functions that exhibit high second order nonlinearity. We commence with a theoretical overview of Boolean functions and Reed- Muller codes. We then introduce a new equivalence relation, 2-equivalence, for which we prove a number of important properties. Finally, we analyze the second order nonlinearity of concatenations of two Boolean functions.

System Design And Algorithmic Development For Computational Steering In Distributed Environments, Qishi Wu, Michelle Zhu, Yi Gu, Nageswara S.V. Rao

Department of Computer Science Faculty Scholarship and Creative Works

Supporting visualization pipelines over wide-area networks is critical to enabling large-scale scientific applications that require visual feedback to interactively steer online computations. We propose a remote computational steering system that employs analytical models to estimate the cost of computing and communication components and optimizes the overall system performance in distributed environments with heterogeneous resources. We formulate and categorize the visualization pipeline configuration problems for maximum frame rate into three classes according to the constraints on node reuse or resource sharing, namely no, contiguous, and arbitrary reuse. We prove all three problems to be NP-complete and present heuristic approaches based on …

On The Non-Existence Of A Projective (75, 4,12, 5) Set In Pg(3, 7), Aaron C.S. Chan, James A. Davis, Jonathan Jedwab

Department of Math & Statistics Faculty Publications

We show by a combination of theoretical argument and computer search that if a projective (75, 4, 12, 5) set in PG(3, 7) exists then its automorphism group must be trivial. This corresponds to the smallest open case of a coding problem posed by H. Ward in 1998, concerning the possible existence of an infinite family of projective two-weight codes meeting the Griesmer bound.

Associative Pattern Mining For Supervised Learning, Harpreet Singh

Doctoral Dissertations

The Internet era has revolutionized computational sciences and automated data collection techniques, made large amounts of previously inaccessible data available and, consequently, broadened the scope of exploratory computing research. As a result, data mining, which is still an emerging field of research, has gained importance because of its ability to analyze and discover previously unknown, hidden, and useful knowledge from these large amounts of data. One aspect of data mining, known as frequent pattern mining, has recently gained importance due to its ability to find associative relationships among the parts of data, thereby aiding a type of supervised learning known …

Electronic Structure And Volume Effect On Thermoelectric Transport In P -Type Bi And Sb Tellurides, Minsik Park, Junghwan Song, Julia E. Medvedeva, Miyoung Kim, Ingee Kim, Arthur J. Freeman

Physics Faculty Research & Creative Works

Thermoelectric transport properties (Seebeck coefficient, S, and electrical conductivity, σ) of p -type Bi and Sb tellurides are investigated using a first-principles all-electron density-functional approach. We demonstrate that the carrier concentration, band gap, and lattice constants have an important influence on the temperature behavior of S and that the volume expansion by 5.5% in Sb₂Te₃ results in an increase in S by 33μV/K at 300 K. We argue that in addition to the electronic structure characteristics, the volume also affects the value of S and hence should be considered as an origin of the experimental observations that …

Debye Series For Light Scattering By A Nonspherical Particle, Feng Xu, James A. Lock, Gérard Gouesbet

Physics Faculty Publications

The Debye series is developed for scattering of light by a homogeneous nonspherical particle to interpret the angular dependence of the scattered intensity in terms of various physical processes. In contrast to the previously developed Debye series for several regularly shaped particles that mirror the orthogonal curvilinear coordinate system where the variable-separation method can be applied, we develop and verify the Debye series in a coordinate-independent way using the extended boundary condition method. Verification computations are made for an oblate spheroidal water droplet of equivalent-volume sphere radius 10 mu m.

Debye Series For Light Scattering By A Spheroid, Feng Xu, James A. Lock, Cameron Tropea

Physics Faculty Publications

The Debye series is developed for electromagnetic scattering by a spheroid in order to decompose the far-zone fields into various physical processes. The geometrical rainbow angle and supernumerary spacing parameter are determined from the Debye intensity by fitting the results to an Airy function and comparing them to their assumed values in ray optics and Airy theory, respectively. Eccentricity-related scattering phenomena including the rainbow's angular shift, the disappearance of the rainbow, and the rainbow-enhanced glory are quantitatively demonstrated and analyzed. (c) 2010 Optical Society of America

ผลจากการเผายางรถยนต์สู่การจัดการ, อรุบล โชติพงศ์, เบญจลักษณ์ กาญจนเศรษฐ์

Thai Environment

No abstract provided.

เสียงระเบิด ประทัด การเผายางรถยนต์ และผลกระทบต่อคุณภาพอากาศและเสียง, นพภาพร พานิช

Thai Environment

No abstract provided.

ขยะ...สิ่งที่เกิดขึ้นระหว่างชุมนุม, พันธวัศ สัมพันธ์พานิช

Thai Environment

No abstract provided.

ปัญหาน้ำจากการชุมนุม, ทวีวงศ์ ศรีบุรี

Thai Environment

No abstract provided.

การระบายน้ำกับพื้นที่ชุมนุม, ทรงกฤษณ์ ประภักดี

Thai Environment

No abstract provided.

การป้องกกันการเจ็บป่วยเนื่องจากการชุมนุม, กัลยา สุนทรวงศ์สกุล

Thai Environment

No abstract provided.