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Articles 141181 - 141210 of 303070

Full-Text Articles in Physical Sciences and Mathematics

All-Weather Surfaces For Cattle Watering Facilities, Stephen F. Higgins, Kylie Schmidt, Donald J. Stamper, Kevin Laurent Jul 2015

All-Weather Surfaces For Cattle Watering Facilities, Stephen F. Higgins, Kylie Schmidt, Donald J. Stamper, Kevin Laurent

Agriculture and Natural Resources Publications

A livestock watering area includes a watering facility and the heavy-use-area (HUA) surrounding it. Without protection, the HUA can develop surface depressions. Surface depressions can render the watering facility inaccessible and no longer frost-proof. Surface depressions also collect rainwater and excrement, creating mud and conditions adverse to livestock health (Figure 1).

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Slaframine Toxicosis Or “Slobbers” In Cattle And Horses, Michelle Arnold, S. Ray Smith Jul 2015

Slaframine Toxicosis Or “Slobbers” In Cattle And Horses, Michelle Arnold, S. Ray Smith

Agriculture and Natural Resources Publications

An exceptionally wet summer weather pattern favors the growth of fungi on plants in the field and increases the risk for production of mycotoxins. Mycotoxins are naturally occurring compounds, some of which are toxic to cattle and horses, produced by fungi invading plant material. In the late 1940s and through the 1950s, beef and dairy producers and horse owners reported outbreaks of excessive salivation (slobbering) in cattle and horses associated with the consumption of second-cutting red clover (Trifolium pratense) and occasionally other legumes in the form of hay, pasture, or silage. It was not until the 1960s that …

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Acute Or Atypical Interstitial Pneumonia (Aip), Michelle Arnold, Jeff Lehmkuhler Jul 2015

Acute Or Atypical Interstitial Pneumonia (Aip), Michelle Arnold, Jeff Lehmkuhler

Agriculture and Natural Resources Publications

Acute or atypical interstitial pneumonia (AIP) is terminology used by veterinary pathologists to describe a characteristic pattern of damage in the lungs of cattle. At necropsy, the first indication of AIP-affected lungs is they fill the thorax and do not collapse like normal lungs when the chest cavity is opened. On further investigation, the AIP lungs are found to be semi-firm with a rubbery texture; not hard and consolidated as occurs in bacterial bronchopneumonia. Large air bubbles are found between portions of the lung (see Figure 1, “interlobular” or “bullous” emphysema) and the cut surface of the lung may appear …

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Staggers (Tremorgenic Syndrome), Michelle Arnold Jul 2015

Staggers (Tremorgenic Syndrome), Michelle Arnold

Agriculture and Natural Resources Publications

“Staggers” is an all-inclusive term for a group of nervous system disorders caused by indole-diterpenoid mycotoxins produced by various types of fungi on forages. These mycotoxins are collectively known as “tremorgens” (Table 1), and they may be found in several types of grasses at varying stages of maturity. The three main grass types associated with tremorgenic syndrome are Paspalum spp. (dallisgrass and bahiagrass), Cynodon dactylon (bermudagrass) and Lolium perenne (perennial ryegrass). Clinical signs are characterized by tremors and incoordination that tend to worsen with excitement or movement.

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Guía De Monitoreo De Mip Para Plagas Comunes De Los Cultivos Cucurbitáceos En Kentucky, Kenneth W. Seebold, Timothy Coolong, Terry Jones, John Strang, Ricardo Bessin, Cheryl A. Kaiser Jul 2015

Guía De Monitoreo De Mip Para Plagas Comunes De Los Cultivos Cucurbitáceos En Kentucky, Kenneth W. Seebold, Timothy Coolong, Terry Jones, John Strang, Ricardo Bessin, Cheryl A. Kaiser

Agriculture and Natural Resources Publications

Mucho antes de que el término “sostenible” se hiciera tan conocido, los agricultores ya estaban implementando prácticas sostenibles en forma de estrategias de manejo integrado de plagas. El MIP usa una combinación de métodos biológicos, de cultivo, físicos, y químicos que reducen y/o manejan las poblaciones de pestes. Estas estrategias son usadas para minimizar los riesgos ambientales, de costos, y peligros a la salud. Las plagas son manejadas para reducir su impacto negativo en el cultivo, aunque raramente las pestes son eliminadas.

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A Posteriori Eigenvalue Error Estimation For The Schrödinger Operator With The Inverse Square Potential, Hengguang Li, Jeffrey S. Ovall Jul 2015

A Posteriori Eigenvalue Error Estimation For The Schrödinger Operator With The Inverse Square Potential, Hengguang Li, Jeffrey S. Ovall

Mathematics and Statistics Faculty Publications and Presentations

We develop an a posteriori error estimate of hierarchical type for Dirichlet eigenvalue problems of the form (−∆ + (c/r) 2 )ψ = λψ on bounded domains Ω, where r is the distance to the origin, which is assumed to be in Ω. This error estimate is proven to be asymptotically identical to the eigenvalue approximation error on a family of geometrically-graded meshes. Numerical experiments demonstrate this asymptotic exactness in practice.

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The Facility Location Problem, Meghan E. Csoke Jul 2015

The Facility Location Problem, Meghan E. Csoke

All Student Theses and Dissertations

The purpose of this study was to analyze the location of an emergency facility location within a town based on given information from the village and to use the results to determine the optimal location for an emergency facility. A model of the problem was developed using a spreadsheet and computer program to record and analyze the optimal response time based on different locations of emergency facilities. Assumptions were made to create situations easily computed through spreadsheet and computer programs. Once calculated, information was used to create a framework of demand density across a gridded map. Once the computer program …

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High Impact Strategies And The Effect It Has On Students’ Mathematics Attitudes, Lauren A. Ryba Jul 2015

High Impact Strategies And The Effect It Has On Students’ Mathematics Attitudes, Lauren A. Ryba

All Student Theses and Dissertations

This study was designed to determine if innovative strategies such as the use of technology and Supplemental Instruction (SI) could have an impact on students in an introductory statistics course. The study describes the use of a reliable instrument to measure students’ attitudes and beliefs about mathematics. Martha Tapia developed the Attitudes Toward Mathematics Inventory (ATMI) instrument in 1996 and later Lim and Chapman further refined a short form in 2012. The purpose of the ATMI was to measure mathematics attitudes in four ways: (1) enjoyment of mathematics, (2) motivation to do mathematics, (3) self confidence in mathematics, and (4) …

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Mate Choice In Temperate And Tropical Spiny Lobsters With Contrasting Reproductive Systems, Mark Butler Iv, Rodney Bertelsen, Alison Macdiarmid Jul 2015

Mate Choice In Temperate And Tropical Spiny Lobsters With Contrasting Reproductive Systems, Mark Butler Iv, Rodney Bertelsen, Alison Macdiarmid

Biological Sciences Faculty Publications

Sperm limitation of reproductive success is common in decapod crustaceans, favouring mating systems in which females compete for large males of high reproductive value. We investigated these phenomena in two species of spiny lobsters—one temperate, one tropical—with contrasting reproductive systems: the Southern Rock Lobster (Jasus edwardsii) and the Caribbean Spiny Lobster (Panulirus argus). We hypothesized that female mate selection should be more pronounced in the temperate J. edwardsii than in the tropical P. argus because J. edwardsii matures later, has a shorter mating season, and produces just one clutch of eggs per year that benefit from …

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Fast, Accurate, And Reliable Molecular Docking With Quickvina 2, Amr Alhossary, Stephanus Daniel Handoko, Yuguang Mu, Chee-Keong Kwoh Jul 2015

Fast, Accurate, And Reliable Molecular Docking With Quickvina 2, Amr Alhossary, Stephanus Daniel Handoko, Yuguang Mu, Chee-Keong Kwoh

Research Collection School Of Computing and Information Systems

Motivation: The need for efficient molecular docking tools for high-throughput screening is growing alongside the rapid growth of drug-fragment databases. AutoDock Vina ('Vina') is a widely used docking tool with parallelization for speed. QuickVina ('QVina 1') then further enhanced the speed via a heuristics, requiring high exhaustiveness. With low exhaustiveness, its accuracy was compromised. We present in this article the latest version of QuickVina ('QVina 2') that inherits both the speed of QVina 1 and the reliability of the original Vina.Results: We tested the efficacy of QVina 2 on the core set of PDBbind 2014. With the default exhaustiveness level …

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Using Tweets To Help Sentence Compression For News Highlights Generation, Zhongyu Wei, Yang Liu, Chen Li, Wei Gao Jul 2015

Using Tweets To Help Sentence Compression For News Highlights Generation, Zhongyu Wei, Yang Liu, Chen Li, Wei Gao

Research Collection School Of Computing and Information Systems

We explore using relevant tweets of a given news article to help sentence compression for generating compressive news highlights. We extend an unsupervised dependency-tree based sentence compression approach by incorporating tweet information to weight the tree edge in terms of informativeness and syntactic importance. The experimental results on a public corpus that contains both news articles and relevant tweets show that our proposed tweets guided sentence compression method can improve the summarization performance significantly compared to the baseline generic sentence compression method.

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Residue-Specific Structures And Membrane Locations Of Ph-Low Insertion Peptide By Solid-State Nuclear Magnetic Resonance, Nicolas S. Shu, Michael S. Chung, Lan L. Yao, Ming An, Wei Qiang Jul 2015

Residue-Specific Structures And Membrane Locations Of Ph-Low Insertion Peptide By Solid-State Nuclear Magnetic Resonance, Nicolas S. Shu, Michael S. Chung, Lan L. Yao, Ming An, Wei Qiang

Chemistry Faculty Scholarship

The pH-low insertion peptide (pHLIP) binds to a membrane at pH 7.4 unstructured but folds across the bilayer as a transmembrane helix at pH similar to 6. Despite their promising applications as imaging probes and drug carriers that target cancer cells for cytoplasmic cargo delivery, the mechanism of pH modulation on pHLIP-membrane interactions has not been completely understood. Here, we show the first study on membrane-associated pHLIP using solid-state NMR spectroscopy. Data on residue-specific conformation and membrane location describe pHLIP in various surface-bound and membrane-inserted states at pH 7.4, 6.4 and 5.3. The critical membrane-adsorbed state is more complex than …

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Muonic Bound Systems, Virtual Particles, And Proton Radius, Ulrich D. Jentschura Jul 2015

Muonic Bound Systems, Virtual Particles, And Proton Radius, Ulrich D. Jentschura

Physics Faculty Research & Creative Works

The proton radius puzzle questions the self-consistency of theory and experiment in light muonic and electronic bound systems. Here we summarize the current status of virtual particle models as well as Lorentz-violating models that have been proposed in order to explain the discrepancy. Highly charged one-electron ions and muonic bound systems have been used as probes of the strongest electromagnetic fields achievable in the laboratory. The average electric field seen by a muon orbiting a proton is comparable to hydrogenlike uranium and, notably, larger than the electric field in the most advanced strong-laser facilities. Effective interactions due to virtual annihilation …

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Crystal Structure Of Cis-2-(2-Carboxycyclopropyl)-Glycine (Ccg-Iii) Monohydrate, Sergey V. Lindeman, Nathaniel J. Wallock, William A. Donaldson Jul 2015

Crystal Structure Of Cis-2-(2-Carboxycyclopropyl)-Glycine (Ccg-Iii) Monohydrate, Sergey V. Lindeman, Nathaniel J. Wallock, William A. Donaldson

Chemistry Faculty Research and Publications

The title compound, C6H9NO4·H2O [systematic name: (αR,1R,2S)-rel-α-amino-2-carb­oxy­cyclo­propane­acetic acid monohydrate], crystallizes with two organic mol­ecules and two water mol­ecules in the asymmetric unit. The space group is P21 and the organic mol­ecules are enanti­omers, thus this is an example of a `false conglomerate' with two mol­ecules of opposite handedness in the asymmetric unit (r.m.s. overlay fit = 0.056 Å for one mol­ecule and its inverted partner). Each mol­ecule exists as a zwitterion, with proton transfer from the amino acid carb­oxy­lic acid group to …

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An Assessment Of The Hydrologic Connection Between Blacktail Creek And A Riverine Wetland For Nutrients Processing Potential, Jonathan Ball Jul 2015

An Assessment Of The Hydrologic Connection Between Blacktail Creek And A Riverine Wetland For Nutrients Processing Potential, Jonathan Ball

Graduate Theses & Non-Theses

Silver Bow Creek (Blacktail Creek to Warm Springs Creek) is listed as impaired for nitrates, total nitrogen and total phosphorus in the Montana 2014 draft 303(d) list. Blacktail Creek, a head water to Silver Bow Creek, flows approximately 17 miles before joining Silver Bow Creek in Butte, MT. Previous studies have shown that nutrient concentrations in Blacktail Creek are significantly higher than the Montana Department of Environmental Quality (DEQ) target concentrations. In the literature, constructed (treatment) wetlands have been popularly used as an effective Best Management Practice (BMP) to process nutrients from municipal, industrial, and livestock wastewater. While there has …

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Design And Validation Of Hardware-In-The-Loop Testbed For Proximity Operations Payloads, Kristia K. Harris Jul 2015

Design And Validation Of Hardware-In-The-Loop Testbed For Proximity Operations Payloads, Kristia K. Harris

Doctoral Dissertations and Master's Theses

The research presented here is a new testbed design for CubeSat and payload testing and development. This research demonstrates a low-cost, hardware-in-the-loop testing apparatus for use with university CubeSat programs for testing throughout the different levels of the development process. The average university CubeSat program undergoes very little hardware-in-the-loop testing. Most of the focus is the targeted towards performance testing and environmental testing which occur after completion the development process. This research shows that, for minimal schedule and cost impact, testing can occur early in the development process. The testbed presented here demonstrates suitable accuracy to be used for advanced …

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Constraints On Soluble Aerosol Iron Flux To The Southern Ocean At The Last Glacial Maximum, Tim M. Conway, E. W. Wolff, R. Röthlisberger, R. Mulvaney, H. E. Elderfield Jul 2015

Constraints On Soluble Aerosol Iron Flux To The Southern Ocean At The Last Glacial Maximum, Tim M. Conway, E. W. Wolff, R. Röthlisberger, R. Mulvaney, H. E. Elderfield

School of Geosciences Faculty and Staff Publications

Relief of iron (Fe) limitation in the Southern Ocean during ice ages, with potentially increased carbon storage in the ocean, has been invoked as one driver of glacial–interglacial atmospheric CO2 cycles. Ice and marine sediment records demonstrate that atmospheric dust supply to the oceans increased by up to an order of magnitude during glacial intervals. However, poor constraints on soluble atmospheric Fe fluxes to the oceans limit assessment of the role of Fe in glacial–interglacial change. Here, using novel techniques, we present estimates of water- and seawater-soluble Fe solubility in Last Glacial Maximum (LGM) atmospheric dust from the European …

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Efficient Simultaneous Task And Motion Planning For Multiple Mobile Robots Using Task Reachability Graphs, Brad Woosley Jul 2015

Efficient Simultaneous Task And Motion Planning For Multiple Mobile Robots Using Task Reachability Graphs, Brad Woosley

Student Work

In this thesis, we consider the problem of efficient navigation by robots in initially unknown environments while performing tasks at certain locations. In initially unknown environments, the path plans might change dynamically as the robot discovers obstacles along its route. Because robots have limited energy, adaptations to the task schedule of the robot in conjunction with updates to its path plan are required so that the robot can perform its tasks while reducing time and energy expended. However, most existing techniques consider robot path planning and task planning as separate problems. This thesis plans to bridge this gap by developing …

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สถานการณ์ปัญหาขยะอิเล็กทรอนิกส์, สุจิตรา วาสนาดำรงดี Jul 2015

สถานการณ์ปัญหาขยะอิเล็กทรอนิกส์, สุจิตรา วาสนาดำรงดี

Thai Environment

No abstract provided.

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ไฟไหม้บ่อขยะ...หากรู้ทัน...ป้องกันได้, ทรงกฤษณ์ ประภักดี Jul 2015

ไฟไหม้บ่อขยะ...หากรู้ทัน...ป้องกันได้, ทรงกฤษณ์ ประภักดี

Thai Environment

No abstract provided.

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การปนเปื้อนโลหะหนักในดินในพื้นที่ชุมชนคัดแยกขยะอิเล็กทรอนิกส์ กรุงเทพมหานคร, ศ๊ลาวุธ ดำรงศิริ Jul 2015

การปนเปื้อนโลหะหนักในดินในพื้นที่ชุมชนคัดแยกขยะอิเล็กทรอนิกส์ กรุงเทพมหานคร, ศ๊ลาวุธ ดำรงศิริ

Thai Environment

No abstract provided.

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ความแห้งแล้งเชิงเกษตรกรรม : ผลกระทบและความท้าทายในการวางแผนป้องกันและแก้ไขปัญหาของประเทศเกษตรกรรม, เสาวนีย์ วิจิตรโกสุม Jul 2015

ความแห้งแล้งเชิงเกษตรกรรม : ผลกระทบและความท้าทายในการวางแผนป้องกันและแก้ไขปัญหาของประเทศเกษตรกรรม, เสาวนีย์ วิจิตรโกสุม

Thai Environment

No abstract provided.

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ความสัมพันธ์ระหว่างกระบวนการออกแบบสถาปัตยกรรมการศึกษาความเป็นไปได้โครงการกับการวิเคราะห์ผลกระทบสิ่งแวดล้อม, จารุณี นิมิตศิริวัฒน์ Jul 2015

ความสัมพันธ์ระหว่างกระบวนการออกแบบสถาปัตยกรรมการศึกษาความเป็นไปได้โครงการกับการวิเคราะห์ผลกระทบสิ่งแวดล้อม, จารุณี นิมิตศิริวัฒน์

Thai Environment

No abstract provided.

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ถอดบทเรียนการจัดการขยะอิเล็กทรอนิกส์ในต่างประเทศ, สุจิตรา วาสนาดำรงดี Jul 2015

ถอดบทเรียนการจัดการขยะอิเล็กทรอนิกส์ในต่างประเทศ, สุจิตรา วาสนาดำรงดี

Thai Environment

No abstract provided.

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ขยะมูลฝอยกับขยะอันตราย คนละเรื่องเดียวกัน...เข้าใจตรงกันนะ, ภุมรินทร์ คำเดชศักดิ์ Jul 2015

ขยะมูลฝอยกับขยะอันตราย คนละเรื่องเดียวกัน...เข้าใจตรงกันนะ, ภุมรินทร์ คำเดชศักดิ์

Thai Environment

No abstract provided.

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จาก "น้ำเสีย" สู่ "ปุ๋ย" "เพียงปรับเปลี่ยนกระบวนการของเสียก็กลับกลายเป็นของมีค่า" แนวคิดสู่การพัฒนาที่ยั่งยืน, ศีลาวุธ ดำรงศิริ Jul 2015

จาก "น้ำเสีย" สู่ "ปุ๋ย" "เพียงปรับเปลี่ยนกระบวนการของเสียก็กลับกลายเป็นของมีค่า" แนวคิดสู่การพัฒนาที่ยั่งยืน, ศีลาวุธ ดำรงศิริ

Thai Environment

No abstract provided.

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โพรเพน : พลังงานสะอาดจากเชื้ออีโคไล์ (E.Coli), ธีรพล คังคะเกตุ Jul 2015

โพรเพน : พลังงานสะอาดจากเชื้ออีโคไล์ (E.Coli), ธีรพล คังคะเกตุ

Thai Environment

No abstract provided.

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Nitrate And Nitrite Ingestion And Risk Of Ovarian Cancer Among Postmenopausal Women In Iowa, Maki Inoue-Choi, Rena R. Jones, Kristin E. Anderson, Kenneth P. Cantor, James R. Cerhan, Stuart Krasner, Kimberly Robien, Peter J. Weyer, Mary H. Ward Jul 2015

Nitrate And Nitrite Ingestion And Risk Of Ovarian Cancer Among Postmenopausal Women In Iowa, Maki Inoue-Choi, Rena R. Jones, Kristin E. Anderson, Kenneth P. Cantor, James R. Cerhan, Stuart Krasner, Kimberly Robien, Peter J. Weyer, Mary H. Ward

Epidemiology Faculty Publications

Nitrate and nitrite are precursors in the endogenous formation of N-nitroso compounds (NOC), potential human carcinogens. We evaluated the association of nitrate and nitrite ingestion with postmenopausal ovarian cancer risk in the Iowa Women's Health Study. Among 28,555 postmenopausal women, we identified 315 incident epithelial ovarian cancers from 1986 to 2010. Dietary nitrate and nitrite intakes were assessed at baseline using food frequency questionnaire data. Drinking water source at home was obtained in a 1989 follow-up survey. Nitrate-nitrogen (NO3-N) and total trihalomethane (TTHM) levels for Iowa public water utilities were linked to residences and average levels were …

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Formation Of Three-Dimensional Surface Waves On Deep-Water Using Elliptic Solutions Of Nonlinear Schrödinger Equation, Shahrdad G. Sajjadi, S.C. Mancas, Frederique Drullion Jul 2015

Formation Of Three-Dimensional Surface Waves On Deep-Water Using Elliptic Solutions Of Nonlinear Schrödinger Equation, Shahrdad G. Sajjadi, S.C. Mancas, Frederique Drullion

Publications

A review of three-dimensional waves on deep-water is presented. Three forms of three-dimensionality, namely oblique, forced and spontaneous types, are identified. An alternative formulation for these three-dimensional waves is given through cubic nonlinear Schrödinger equation. The periodic solutions of the cubic nonlinear Schrödinger equation are found using Weierstrass elliptic ℘ functions. It is shown that the classification of solutions depends on the boundary conditions, wavenumber and frequency. For certain parameters, Weierstrass ℘ functions are reduced to periodic, hyperbolic or Jacobi elliptic functions. It is demonstrated that some of these solutions do not have any physical significance. An analytical solution of …

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Rock Creek Restoration Macroinvertebrate Monitoring Report, Daniel Bedell Jul 2015

Rock Creek Restoration Macroinvertebrate Monitoring Report, Daniel Bedell

Environmental Science and Management Professional Master's Project Reports

Stream restoration is widely used to rebuild habitat for native fisheries, but it is not well understood how current habitat reconstruction practices affect biological diversity. Citizen Science programs have potential to provide supplemental macroinvertebrate data for effectiveness monitoring of reach-scale restoration projects but variability in training, experience and collection methods can make interpretation difficult. The Clackamas Water Environment Services Watershed Health Education Program (WHEP) is an example of a Citizen Science-based program actively collecting biological data from restored streams. The purpose of this project was to use WHEP student-collected data to detect benthic macroinvertebrate community responses to stream restoration practices. …

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