Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Physical Sciences and Mathematics

PDF

University of Nebraska - Lincoln

2006

Keyword
Publication

Articles 31 - 60 of 698

Full-Text Articles in Entire DC Network

The Biology Of Introduced Norway Rats On Kiska Island, Alaska, And An Evaluation Of An Eradication Approach, Gary W. Witmer, Patrick Burke, Susan Jojola, Peter Dunlevy Nov 2006

The Biology Of Introduced Norway Rats On Kiska Island, Alaska, And An Evaluation Of An Eradication Approach, Gary W. Witmer, Patrick Burke, Susan Jojola, Peter Dunlevy

USDA Wildlife Services: Staff Publications

Introduced, invasive rats can cause substantial damage to native flora and fauna, including ground-nesting seabirds, when they become established on islands. We tested a control method for introduced Norway rats on Kiska Island, Alaska, during April-May, 2004, by hand-broadcasting rodenticide pellets (0.005% diaphacinone) over a 4-ha area at the rate of 28 kg/ha. We also gathered data on aspects of rat ecology and distribution, although rats were difficult to detect and capture. The rodenticide bait pellets seemed to have been effective in reducing the Norway rat population, however, this is based on a limited observation of rat sign and captures. …

Go to article

High-Resolution Imaging Of Proteins In Human Teeth By Scanning Probe Microscopy, Alexei Gruverman, D. Wu, B. J. Rodriguez, Sergei V. Kalinin, S. Habelitz Nov 2006

High-Resolution Imaging Of Proteins In Human Teeth By Scanning Probe Microscopy, Alexei Gruverman, D. Wu, B. J. Rodriguez, Sergei V. Kalinin, S. Habelitz

Alexei Gruverman Publications

High-resolution studies of dental tissues are of considerable interest for biomedical engineering and clinical applications. In this paper, we demonstrate the application of piezoresponse force microscopy (PFM) to nanoscale imaging of internal structure of human teeth by monitoring the local mechanical response to an electrical bias applied via a conductive tip. It is shown that PFM is capable of detecting dissimilar components of dental tissues, namely, proteins and calcified matrix, which have resembling morphology but different piezoelectric properties. It is demonstrated that collagen fibrils revealed in chemically treated intertubular dentin exhibit high piezoelectric activity and can be visualized in PFM …

Go to article

Evidence For Two Kinematically Distinct Broad Emission Line Producing Regions In Active Galactic Nuclei, Stephanie A. Snedden, C. Martin Gaskell Nov 2006

Evidence For Two Kinematically Distinct Broad Emission Line Producing Regions In Active Galactic Nuclei, Stephanie A. Snedden, C. Martin Gaskell

C. Martin Gaskell Publications

We present the results of an analysis of line profiles of high- and low-ionization broad emission lines in 8 AGNs observed by the Hubble Space Telescope. We derive the physical conditions in the gas as a function of velocity. We find no evidence for a separate intermediate line region. For the broad line region as a whole we find a major contradiction between the velocity dependencies of conditions deduced from the major high-ionization lines and those deduced from the hydrogen lines alone if they are assumed to come from the same gas clouds. The hydrogen lines imply that the density …

Go to article

X-Ray/Ultraviolet Observing Campaign Of The Markarian 279 Active Galactic Nucleus Outflow: A Close Look At The Absorbing/Emitting Gas With Chandra-Letgs, E. Constantini, Jelle S. Kaastra, Nahum Arav, Gerard A. Kriss, K.C. Steenbrugge, Jack R. Gabel, F. Verbunt, Ehud Behar, C. Martin Gaskell, Kirk T. Korista, Daniel Proga, Jessica Kim-Quijano, J.E. Scott, Elizabeth S. Klimek, C.H. Hedrick Nov 2006

X-Ray/Ultraviolet Observing Campaign Of The Markarian 279 Active Galactic Nucleus Outflow: A Close Look At The Absorbing/Emitting Gas With Chandra-Letgs, E. Constantini, Jelle S. Kaastra, Nahum Arav, Gerard A. Kriss, K.C. Steenbrugge, Jack R. Gabel, F. Verbunt, Ehud Behar, C. Martin Gaskell, Kirk T. Korista, Daniel Proga, Jessica Kim-Quijano, J.E. Scott, Elizabeth S. Klimek, C.H. Hedrick

C. Martin Gaskell Publications

We present a Chandra-LETGS observation of the Seyfert 1 galaxy Mrk 279. This observation was carried out simultaneously with HST-STIS and FUSE, in the context of a multiwavelength study of this source. The Chandra pointings were spread over ten days for a total exposure time of ~360 ks. The maximal continuum flux variation is of the order of 30%. The spectrum of Mrk 279 shows evidence of broad emission features, especially at the wavelength of the O VII triplet. We quantitatively explore the possibility that this emission is produced in the broad line region (BLR). We modeled the broad …

Go to article

Nondipole Effects In Double Photoionization Of He, A.Y. Istomin, N. L. Manakov, A. V. Meremianin, Anthony F. Starace Nov 2006

Nondipole Effects In Double Photoionization Of He, A.Y. Istomin, N. L. Manakov, A. V. Meremianin, Anthony F. Starace

Anthony F. Starace Publications

Lowest-order nondipole effects are studied in double photoionization (DPI) of the He atom. Ah initio parametrizations of the quadrupole transition amplitude for DPI from the 1S0state are presented in terms of the exact two-electron reduced matrix elements. Parametrizations for the dipole-quadrupole triply differential cross section (TDCS) and doubly differential cross section (DDCS) are presented in terms of polarization-independent amplitudes for the case of an elliptically polarized photon. Expressions for the DDCS in terms of the reduced two-electron matrix elements are also given. A general analysis of retardation-induced asymmetries of the TDCS including the circular dichroism effect at …

Go to article

Measurement Of The Cp-Violation Parameter Of B0 Mixing And Decay With Pp̅ → ΜμX Data, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration Nov 2006

Measurement Of The Cp-Violation Parameter Of B0 Mixing And Decay With Pp̅ → ΜμX Data, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration

Kenneth Bloom Publications

We measure the dimuon charge asymmetry A in pp̅ collisions at a center of mass energy √s =1960 GeV. The data was recorded with the D0 detector and corresponds to an integrated luminosity of approximately 1:0 fb-1. Assuming that the asymmetry A is due to asymmetric B0 ↔ B̅ mixing and decay, we extract the CP-violation parameter of B0 mixing and decay: [ℜ(∊B0)]/[1+∣∊B0∣2 = (AB0)/4 = -0.0023 ± 0.0011 (stat) ± 0.0008(syst). AB0 is the dimuon charge asymmetry from decays of B …

Go to article

Threshold Effects In Strong-Field Detachment Of H- And F-: Plateau Enhancements And Angular Distribution Variations, Katarzyna Krajewska, Ilya I. Fabrikant, Anthony F. Starace Nov 2006

Threshold Effects In Strong-Field Detachment Of H- And F-: Plateau Enhancements And Angular Distribution Variations, Katarzyna Krajewska, Ilya I. Fabrikant, Anthony F. Starace

Anthony F. Starace Publications

Above-threshold detachment (ATD) rates for H1 and F1 ions in the high-energy plateau region are calculated as functions of photon number and laser intensity by solving the time-dependent Schrödinger equation within the Sturmian-Floquet approach. Pronounced enhancements of the ATD rates are found (up to an order of magnitude) as the laser-field intensity passes across ponderomotive-potential-induced channel closings. We confirm the zero-range potential model results of Borca et al. [Phys. Rev. Lett. 88, 193001 (2002)] for negative ions whose initial states have s symmetry, and we investigate here the case of initial states having p symmetry. Depending on …

Go to article

Coexistence And Exclusion Between Humans And Monkeys In Japan: Is Either Really Possible?, David S. Sprague, Nobusuke Iwasaki Nov 2006

Coexistence And Exclusion Between Humans And Monkeys In Japan: Is Either Really Possible?, David S. Sprague, Nobusuke Iwasaki

Ecological and Environmental Anthropology (University of Georgia)

The Japanese people face a cultural and ecological challenge in seeking a new relationship between themselves and the Japanese monkeys (Macaca fuscata). Monkeys are a major agricultural pest. Monkey habitat often lies within a short distance from fields and villages, and vice versa, especially in mountainous areas. The idealized solution is a form of coexistence where humans and monkeys somehow negotiate a harmonious compromise. A word used often in Japanese is kyosei, to live in common, implying a more intimate relation than mere side-by-side coexistence. In practice, kyosei is a word used by policy makers or scholars, but less often …

Go to article

Ethnoprimatology: Toward Reconciliation Of Biological And Cultural Anthropology, Erin P. Riley Nov 2006

Ethnoprimatology: Toward Reconciliation Of Biological And Cultural Anthropology, Erin P. Riley

Ecological and Environmental Anthropology (University of Georgia)

One of the hallmarks of the discipline of anthropology is its holistic approach to the study of what it means to be human. A perennial challenge to the discipline, however, is the question of whether biological and cultural anthropology can truly coexist given their traditionally disparate epistemologies and methodologies. In this paper, I argue that the emerging field of ethnoprimatology, which focuses on the ecological and cultural interconnections between human and nonhuman primates, has real potential to bridge these two subfields. I support my argument by discussing the theoretical rationale of an ethnoprimatological approach with regard to the notion of …

Go to article

One Reserve, Three Primates: Applying A Holistic Approach To Understand The Interconnections Among Ring-Tailed Lemurs (Lemur Catta), Verreaux's Sifaka (Propithecus Verreauxi), And Humans (Homo Sapiens) At Beza Mahafaly Special Reserve, Madagascar, James E. Loudon, Michelle L. Sauther, Krista D. Fish, Mandala Hunter-Ishikawa, Youssouf Jacky Ibrahim Nov 2006

One Reserve, Three Primates: Applying A Holistic Approach To Understand The Interconnections Among Ring-Tailed Lemurs (Lemur Catta), Verreaux's Sifaka (Propithecus Verreauxi), And Humans (Homo Sapiens) At Beza Mahafaly Special Reserve, Madagascar, James E. Loudon, Michelle L. Sauther, Krista D. Fish, Mandala Hunter-Ishikawa, Youssouf Jacky Ibrahim

Ecological and Environmental Anthropology (University of Georgia)


We applied cultural anthropological, ethological, and parasitological methodologies to investigate the interplay among three primate species, ring-tailed lemurs (Lemur catta), Verreaux’s sifaka (Propithecus verreauxi), and humans (Homo sapiens) who live within the same habitat (i.e. in sympatry) around the Beza Mahafaly Special Reserve, Madagascar. Through a fusion of these methodologies we hope to provide a holistic understanding of the advantages and disadvantages of human-nonhuman primate sympatry. Interviews and questionnaires provided us with initial insights regarding the local peoples' attitudes toward sympatric strepsirrhine primates. Origin myths indicate a close association between humans, ring-tailed lemurs, and …

Go to article

Primate Sanctuaries, Taxonomy And Survival: A Case Study From South Africa, Paul Grobler, Magali Jacquier, Helene Denys, Mary Blair, Patricia L. Whitten, Trudy R. Turner Nov 2006

Primate Sanctuaries, Taxonomy And Survival: A Case Study From South Africa, Paul Grobler, Magali Jacquier, Helene Denys, Mary Blair, Patricia L. Whitten, Trudy R. Turner

Ecological and Environmental Anthropology (University of Georgia)


The relationship between humans and non-human primates in South Africa is problematic. On the one hand, vervet monkeys were formerly designated vermin species and could be destroyed at will. On the other hand, many people keep young vervets as pets even though this is illegal, and the animals are confiscated if discovered. Sanctuaries were established to accommodate large numbers of orphaned and confiscated animals. Owners of some of these sanctuaries attempt to establish normal troop structures in the hopes of releasing these animals back into the wild and relieving overcrowding. However, local farmers, fearing crop damage, resist this release. Nature …

Go to article

Human-Nonhuman Primate Interconnections And Their Relevance To Anthropology, Agustin Fuentes Nov 2006

Human-Nonhuman Primate Interconnections And Their Relevance To Anthropology, Agustin Fuentes

Ecological and Environmental Anthropology (University of Georgia)

The human-nonhuman primate interface is a core component in conservation and an emerging area of discourse across anthropology. There is a growing recognition of the relevance of long-term sympatry between human and nonhuman primates. Until recently these relationships received limited attention in the anthropological literature and in the primatological construction of models for the behavior and evolution of primate societies. Most socioecological investigations into primate groups and human populations do not incorporate their interactions (beyond predation or crop raiding), potential pathogen sharing, or the role of the anthropogenically impacted environment. Current relationships between humans and nonhuman primates are generally assumed …

Go to article

Human And Non-Human Primate Co-Existence In The Neotropics: A Preliminary View Of Some Agricultural Practices As A Complement For Primate Conservation, Alejandro Estrada Nov 2006

Human And Non-Human Primate Co-Existence In The Neotropics: A Preliminary View Of Some Agricultural Practices As A Complement For Primate Conservation, Alejandro Estrada

Ecological and Environmental Anthropology (University of Georgia)

In this paper I address the general perception that agricultural activities are the principal threat to primate biodiversity in the tropics and argue that in Neotropical landscapes some agricultural practices may favor primate population persistence, and that this situation merits attention and investigation. To explore these issues, I examined three interrelated pressures upon tropical forests for the Mesoamerican and Amazon basin regions: human population growth trends, levels of poverty and human development and deforestation rates. I also present relevant results of recent surveys completed on the presence and activities of primate populations in agroecosystems in several landscapes in Mesoamerica. I …

Go to article

Human Dimensions Of Northern Muriqui Conservation Efforts, Karen B. Strier, Jean P. Boubli, Francisco B. Pontual, Sergio L. Mendes Nov 2006

Human Dimensions Of Northern Muriqui Conservation Efforts, Karen B. Strier, Jean P. Boubli, Francisco B. Pontual, Sergio L. Mendes

Ecological and Environmental Anthropology (University of Georgia)

The northern muriqui (Brachyteles hypoxanthus) is endemic to Brazil’s Atlantic Forest, and it ranks among the most critically endangered primates in the world. Roughly 25% of the species is found in the 957 ha forest at the Estação Biológica de Caratinga/RPPN-Feliciano Miguel Abdala, in Minas Gerais, Brazil. The long-term research and conservation efforts at this site have received considerable attention, and public awareness and educational campaigns about northern muriquis have been highly effective. Nonetheless, very little about the human dimensions of these efforts have been explicitly described. In this paper, we focus on three distinct, but interconnected dimensions: …

Go to article

Experimental Observation Of Nonlinear Thomson Scattering, Szu-Yuan Chen, Anatoly Maksimchuk, Donald Umstadter Nov 2006

Experimental Observation Of Nonlinear Thomson Scattering, Szu-Yuan Chen, Anatoly Maksimchuk, Donald Umstadter

Donald Umstadter Publications

A century ago, J. J. Thomson showed that the scattering of low-intensity light by electrons was a linear process (i.e., the scattered light frequency was identical to that of the incident light) and that light’s magnetic field played no role. To- day, with the recent invention of ultra-high-peak- power lasers it is now possible to create a sufficient photon density to study Thomson scattering in the relativistic regime. With increasing light intensity, electrons quiver during the scattering process with increasing velocity, approaching the speed of light when the laser intensity approaches 1018 W/cm2. In this limit, the …

Go to article

Α,Ω-Dithiol Oligo(Phenylene Vinylene)S For The Preparation Of High-Quality Π-Conjugated Self-Assembled Monolayers And Nanoparticle-Functionalized Electrodes, Dwight S. Seferos, Rebecca Lai, Kevin W. Plaxco, Guillermo C. Bazan Nov 2006

Α,Ω-Dithiol Oligo(Phenylene Vinylene)S For The Preparation Of High-Quality Π-Conjugated Self-Assembled Monolayers And Nanoparticle-Functionalized Electrodes, Dwight S. Seferos, Rebecca Lai, Kevin W. Plaxco, Guillermo C. Bazan

Rebecca Lai Publications

While thioacetate-terminated oligo(phenylene vinylene)s (OPVs) have been synthesized and employed in applications involving the formation of metal–molecule–metal junctions, the synthesis and application of potentially more versatile α,ω-dithiol OPVs have not previously been described. Here, a thiomethyl-precursor route to the synthesis of α,ω-dithiol OPVs is reported and their ability to form well-ordered self-assembled monolayers (SAMs) without the addition of exogenous deprotection reagents is described. α,ω-Dithiol OPV monolayers exhibit thicknesses consistent with molecular length and are nearly defect-free, as assayed by electrochemical measurements. To demonstrate the ease with which SAMs containing these bifunctional OPVs can, in contrast to thioacetate functionalized OPVs, be …

Go to article

Bird And Other Wildlife Hazards At Airports: Liability Issues For Airport Managers, Richard A. Dolbeer Nov 2006

Bird And Other Wildlife Hazards At Airports: Liability Issues For Airport Managers, Richard A. Dolbeer

USDA Wildlife Services: Staff Publications

Aircraft collisions with birds (bird strikes) and other wildlife are a serious economic and safety problem. The problem has increased in the past decade because of expanding populations of many wildlife species that are hazardous to aviation (Dolbeer and Eschenfelder 2002). Cleary et al. (2004) estimated wildlife strikes (98% involving birds) cost the civil aviation industry in the USA about $500 million/year, 1990-2003. Allan and Orosz (2001) estimated that bird strikes annually cost commercial air carriers over $1.2 billion worldwide, 1999-2000. At least 194 people died and 164 aircraft were destroyed as a result of bird and other wildlife strikes …

Go to article

Gray Wolf Biology Questions And Answers Nov 2006

Gray Wolf Biology Questions And Answers

Rocky Mountain Wolf Recovery Annual Reports

1) Why was the gray wolf listed as endangered?
2) What types of habitat do wolves use?
3) Do wolves need wilderness areas to survive? Can they survive near urban areas?
4) How far do wolves travel?
5) What do wolves eat?
6) If wolf numbers get too high will deer and elk be eliminated?
7) How do wolves in an area affect deer hunting?
8) Do wolves really take the old, young, sick, starving, or injured animals?
9) Do wolves kill more than they can eat?
10) Does the presence of wolves affect the numbers of animals other than …

Go to article

Status Of The Common Snook (Centropomus Undecimalis) In Texas, Kevin L. Pope, David R. Blankinship, Mark Fisher, Reynaldo Patiño Nov 2006

Status Of The Common Snook (Centropomus Undecimalis) In Texas, Kevin L. Pope, David R. Blankinship, Mark Fisher, Reynaldo Patiño

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Catch data are summarized for common snook (Centropomus undecimalis) from 1975 through 2004 from the lower Laguna Madre, the only area along the Texas coast where common snook are routinely captured. Catch rates of common snook were low < 1 common snook per gill net set) and varied among years, as did size structure. Based on the catch rate and size structure data, the adult common snook population is characterized by low abundance and erratic recruitment (i.e., missing or extremely weak year-classes are common). Additional comments on the status of common snook in Texas are provided.

Go to article

Comments On “On The Distribution Of The Product Of Independent Rayleigh Random Variables”, Saralees Nadarajah, Samuel Kotz Nov 2006

Comments On “On The Distribution Of The Product Of Independent Rayleigh Random Variables”, Saralees Nadarajah, Samuel Kotz

Department of Statistics: Faculty Publications

It is pointed out that the result in Salo et al. “The Distribution of the Product of Independent Rayleigh Random Variables” IEEE Trans. Antennas Propag., vol. 54, pp. 639–643, Feb. 2006, is a particular case of a much more general result known since the 1970s. A general technique (known as the H function technique) is described that can be used derive a wide range of results similar to Salo et al.

Go to article

Comments On “On The Distribution Of The Product Of Independent Rayleigh Random Variables”, Saralees Nadarajah, Samuel Kotz Nov 2006

Comments On “On The Distribution Of The Product Of Independent Rayleigh Random Variables”, Saralees Nadarajah, Samuel Kotz

Department of Statistics: Faculty Publications

It is pointed out that the result in Salo et al. “The Distribution of the Product of Independent Rayleigh Random Variables” IEEE Trans. Antennas Propag., vol. 54, pp. 639–643, Feb. 2006, is a particular case of a much more general result known since the 1970s. A general technique (known as the function technique) is described that can be used derive a wide range of results similar to Salo et al.

Go to article

Refuge Update – November/December 2006, Volume 3, Number 6 Nov 2006

Refuge Update – November/December 2006, Volume 3, Number 6

RefugeUpdate (USFWS-NWRS)

Table of Contents:

Least Bell’s Vireos Are Back, page 3 San Joaquin River National Wildlife Refuge hosted totally unexpected residents last year.

Managing Ocean Wildlife, page 5 A new agreement should help in managing marine resources.

Focus on . . . Endangered Species, pages 10-21 Whether it’s the fastest land mammal or the tiniest mussel, refuges work on behalf of endangered species.

Peeping at Peeps, page 24 Shorebirds can be tough to identify. Classroom and fields trips helped.

Go to article

Fluorescence Polarization Of Helium Negative-Ion Resonances Excited By Polarized Electron Impact, J. W. Maseberg, Timothy J. Gay Nov 2006

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 …

Go to article

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 Nov 2006

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 …

Go to article

Wmi Outdoor News Bulletin * November 2006, Volume 60, No. 10 Nov 2006

Wmi Outdoor News Bulletin * November 2006, Volume 60, No. 10

Wildlife Management Institute Outdoor News Bulletin

Contents:

• North American Bird Species Shown to be Susceptible to Avian Influenza

• Longleaf pine restoration gets huge boost from Conservation Reserve Program

• Controversy still stalking elk feedgrounds in Wyoming

• Predator/prey workshop to be held at North American Conference

• New book gets rave notice

• With dove vote, Michiganders shoot science-based wildlife management in the foot

• Geothermal energy issue still boiling at the Valles Caldera National Preserve

• 72nd North American Wildlife and Natural Resources Conference registration

• Northeast states get positively proactive on State Wildlife Actions Plans

• Nominations sought for 2007 northern bobwhite …

Go to article

Water Resources And Geologic Field Trip In York And Seward Counties, Nebraska, Michael J. Jess, Mark Burbach Nov 2006

Water Resources And Geologic Field Trip In York And Seward Counties, Nebraska, Michael J. Jess, Mark Burbach

Conservation and Survey Division

No abstract provided.

Go to article

Electronic Structure And Polymerization Of A Self-Assembled Monolayer With Multiple Arene Rings, D.Q. Feng, David Wisbey, Yaroslav B. Losovyj, Y. Tai, M. Zharnikov, Peter A. Dowben Oct 2006

Electronic Structure And Polymerization Of A Self-Assembled Monolayer With Multiple Arene Rings, D.Q. Feng, David Wisbey, Yaroslav B. Losovyj, Y. Tai, M. Zharnikov, Peter A. Dowben

Peter Dowben Publications

We find evidence of intermolecular interactions for a self-assembled monolayer (SAM) formed from a large molecular adsorbate, [1,1′;4′,1′′-terphenyl]-4,4′′-dimethanethiol, from the dispersion of the molecular orbitals with changing wave vector k. With the formation self-assembled molecular (SAM) layer, the molecular orbitals hybridize to electronic bands, with indications of significant band dispersion of the unoccupied molecular orbitals. The electronic structure is also seen to be dependent upon temperature, and cross linking between the neighbor molecules, indicating that the electronic structure may be subtly altered by changes in molecular conformation and packing.

Go to article

Search For Pair Production Of Scalar Bottom Quarks In Pp̅ Collisions At √S =1:96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration Oct 2006

Search For Pair Production Of Scalar Bottom Quarks In Pp̅ Collisions At √S =1:96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration

Kenneth Bloom Publications

A search for direct production of scalar bottom quarks (b̃) is performed with 310 pb-1 of data collected by the D0 experiment in pp̅ collisions at √s = 1.96 TeV at the Fermilab Tevatron Collider. The topology analyzed consists of two b jets and an imbalance in transverse momentum due to undetected neutralinos (χ̃10), with χ̃10 assumed to be the lightest supersymmetric particle. We find the data consistent with standard model expectations, and set a 95% C.L. exclusion domain in the (mb̃, m χ̃10) mass plane, …

Go to article

The Legacy Of Leaded Gasoline In Bottom Sediment Of Small Rural Reservoirs, Kyle E. Juracek, Andrew C. Ziegler Oct 2006

The Legacy Of Leaded Gasoline In Bottom Sediment Of Small Rural Reservoirs, Kyle E. Juracek, Andrew C. Ziegler

United States Geological Survey: Staff Publications

The historical and ongoing lead (Pb) contamination caused by the 20th-century use of leaded gasoline was investigated by an analysis of bottom sediment in eight small rural reservoirs in eastern Kansas, USA. For the reservoirs that were completed before or during the period of maximum Pb emissions from vehicles (i.e., the 1940s through the early 1980s) and that had a major highway in the basin, increased Pb concentrations reflected the pattern of historical leaded gasoline use. For at least some of these reservoirs, residual Pb is still being delivered from the basins. There was no evidence of increased Pb deposition …

Go to article

Assistance With Wildlife Damage Problems In Nebraska, Scott E. Hygnstrom, John M. Hobbs, James G. Bruner, James Weverka, Dallas R. Virchow, Dennis M. Ferraro Oct 2006

Assistance With Wildlife Damage Problems In Nebraska, Scott E. Hygnstrom, John M. Hobbs, James G. Bruner, James Weverka, Dallas R. Virchow, Dennis M. Ferraro

School of Natural Resources: Faculty Publications

Nebraskans who experience damage and nuisance problems with wildlife can get assistance from several public and private organizations. This NebFact describes the most direct route to the solution of your problem. A reference guide (Table I) lists who to contact for information, materials, permits, and hands-on assistance. Wildlife play an important role in our environment. In addition, we gain many recreational, economic, and aesthetic benefits from them. Unfortunately, the activities of wildlife occasionally conflict with human interests in personal property, agricultural production, and health and safety. The most common wildlife damage and nuisance problems in Nebraska are caused by bats, …

Go to article

First Prev Next Last