Physical Sciences and Mathematics Commons^™

Cleaning The Quequechan River

Watershed Access Lab Projects

The 2005 Quequechan River Project has a couple of interesting subplots: The fecal coliform bacteria data, the increasing phosphorus levels, the leaf decomposition project, and the sewer overflow diversion project.

1. We had no bacteria growth for the samples we collected this year. That could be a good thing resulting from the tunnel project diverting sewer overflow waters or it could just be because we had no rain before we sampled.
2. Our biotic index indicated a severely impacted river (7.0). We collected mostly scuds from our site below the bridge. However, when we went with Olyssa Starry from the Urban Environmental …

Indian Head River Project

Watershed Access Lab Projects

The Indian Head River is a tributary of the North River which is part of the South Coastal Basin. The Drinkwater becomes the Indian Head River below Factory Pond on the Hanson/Hanover line. Upstream there are a number of businesses but from Factory Pond downstream, much of the river has a forested riparian zone. The Indian Head River flows through the towns of Hanson, Hanover, and Pembroke. Between the two study sites there is some white water including several small waterfalls.

This is the fourth year that Whitman-Hanson Regional Schools have investigated the Indian Head River. The High School studied …

Rivernet Watershed Access Lab Program Overview, Kevin Curry, Kim Mccoy

Watershed Access Lab Projects

Brief presentation on the history of the RiverNet Watershed Access Lab Project and the achievements of the many participating teachers and hundreds of students throughout Southeastern Massachusetts.

Probabilistic Risk Assessment For Snails, Slugs, And Endangered Honeycreepers In Diphacinone Rodenticide Baited Areas On Hawaii, Usa, John J. Johnston, William C. Pitt, Robert T. Sugihara, John D. Eisemann, Thomas M. Primus, Melvin J. Holmes, Joe Crocker, Andy Hart

United States Department of Agriculture Wildlife Services: Staff Publications

Three probabilistic models were developed for characterizing the risk of mortality and sub-acute coagulopathy to Poouli, an endangered non-target avian species, in broadcast diphacinone-baited areas on Hawaii, USA. For single-day exposure, the risk of Poouli mortality approaches 0. For 5-d exposure, the mean probability of mortality increased to 3% for adult and 8% for juvenile Poouli populations. For Poouli that consume snails containing diphacinone residues for 14 d, the model predicted increased levels of coagulopathy for 0.42 and 11% of adult and juvenile Poouli populations, respectively. Worst-case deterministic risk characterizations predicted acceptable levels of risk for non-threatened or endangered species …

Measurement Of Charged-Particle Multiplicities In Gluon And Quark Jets In Pp̅ Collisions At √S =1.8 Tev, Darin Acosta, Kenneth A. Bloom, Collider Detector At Fermilab Collaboration

Kenneth Bloom Publications

We report the first largely model independent measurement of charged particle multiplicities in quark and gluon jets, N_q and N_g, produced at the Fermilab Tevatron in pp̅ collisions with a center-of-mass energy of 1.8 TeV and recorded by the Collider Detector at Fermilab. The measurements are made for jets with average energies of 41 and 53 GeV by counting charged particle tracks in cones with opening angles of θ _c=0.28, 0.36, and 0.47 rad around the jet axis. The corresponding jet hardness Q=E_jet θ _c varies in the range from 12 to 25 GeV. At …

Transverse-Momentum PT Correlations On (Η,Φ) From Mean-PT Fluctuations In Au–Au Collisions At √SNn = 200 Gev, J. Adams, M.M. Aggarwal, Z. Ahammed, J. Amonett, B.D. Anderson, D. Arkhipkin, G.S. Averichev, S.K. Badyal, Y. Bai, J. Balewski, O. Barannikova, L.S. Barnby, J. Baudot, S. Bekele, V.V. Belaga, A. Bellingeri-Laurikainen, R. Bellwied, J. Berger, B.I. Bezverkhny, S. Bharadwaj, A. Bhasin, A.K. Bhati, V.S. Bhatia, H. Bichsel, J. Bielcik, J. Bielcikova, A. Billmeier, L.C. Bland, C.O. Blyth, S-L. Blyth, B.E. Bonner, M. Botje, A. Boucham, J. Bouchet, A.V. Brandin, A. Bravar, M. Bystersky, R.V. Cadman, X.Z. Cai, H. Caines, M. Calderón De La Barca Sánchez, J. Castillo, O. Catu, D. Cebra, Z. Chajecki, P. Chaloupka, S. Chattopadhyay, H.F. Chen, J.H. Chen, Y. Chen, J. Cheng, M. Cherney, A. Chikanian, H.A. Choi, W. Christie, J.P. Coffin, T.M. Cormier, M.R. Cosentino, J.G. Cramer, H.J. Crawford, D. Das, S. Das, M. Daugherity, M.M. De Moura, T.G. Dedovich, M. Dephillips, A.A. Derevschikov, L. Didenko, T. Dietel, S.M. Dogra, W.J. Dong, X. Dong, J.E. Draper, F. Du, A.K. Dubey, V.B. Dunin, J.C. Dunlop, M.R. Dutta Mazumdar, V. Eckardt, W.R. Edwards, L.G. Efimov, V. Emelianov, J. Engelage, G. Eppley, B. Erazmus, M. Estienne, P. Fachini, J. Faivre, R. Fatemi, J. Fedorisin, K. Filimonov, P. Filip, E. Finch, V. Fine, Y. Fisyak, K.S.F. Fornazier, J. Fu, C.A. Gagliardi, L. Gaillard, J. Gans, M.S. Ganti, F. Geurts, V. Ghazikhanian, P. Ghosh, J.E. Gonzalez, H. Gos, O. Grachov, O. Grebenyuk, D. Grosnick, S.M. Guertin, Y. Guo, A. Gupta, N. Gupta, T.D. Gutierrez, T.J. Hallman, A. Hamed, D. Hardtke, J.W. Harris, M. Heinz, T.W. Henry, S. Hepplemann, B. Hippolyte, A. Hirsch, E. Hjort, G.W. Hoffmann, M.J. Horner, H.Z. Huang, S.L. Huang, E.W. Hughes, T.J. Humanic, G. Igo, A. Ishihara, P. Jacobs, W.W. Jacobs, M. Jedynak, H. Jiang, P.G. Jones, E.G. Judd, S. Kabana, K. Kang, M. Kaplan, D. Keane, A. Kechechyan, V.Yu. Khodyrev, B.C. Kim, J. Kiryluk, A. Kisiel, E.M. Kislov, J. Klay, S.R. Klein, D.D. Koetke, T. Kollegger, M. Kopytine, L. Kotchenda, K.L. Kowalik, M. Kramer, P. Kravtsov, V.I. Kravtsov, K. Krueger, C. Kuhn, A.I. Kulikov, A. Kumar, R. Kh. Kutuev, A.A. Kuznetsov, M.A.C. Lamont, J.M. Landgraf, S. Lange, F. Laue, J. Lauret, A. Lebedev, R. Lednicky, C-H. Lee, S. Lehocka, M.J. Levine, C. Li, Q. Li, Y. Li, G. Lin, S.J. Lindenbaum, M.A. Lisa, F. Liu, H. Liu, J. Liu, L. Liu, Q.J. Liu, Z. Liu, T. Ljubicic, W.J. Llope, H. Long, R.S. Longacre, M. Lopez-Noriega, W.A. Love, Y. Lu, T. Ludlam, D. Lynn, G.L. Ma, J.G. Ma, Y.G. Ma, D. Magestro, S. Mahajan, D.P. Mahapatra, R. Majka, L.K. Mangotra, R. Manweiler, S. Margetis, C. Markert, L. Martin, J.N. Marx, H.S. Matis, Yu.A. Matulenko, C.J. Mcclain, T.S. Mcshane, F. Meissner, Yu. Melnick, A. Meschanin, M.L. Miller, N.G. Minaev, C. Mironov, A. Mischke, D.K. Mishra, J. Mitchell, B. Mohanty, L. Molnar, C.F. Moore, D.A. Morozov, M.G. Munhoz, B.K. Nandi, S.K. Nayak, T.K. Nayak, J.M. Nelson, P.K. Netrakanti, V.A. Nikitin, L.V. Nogach, S.B. Nurushev, G. Odyniec, A. Ogawa, V. Okorokov, M. Oldenburg, D. Olson, S.K. Pal, Y. Panebratsev, S.Y. Panitkin, A.I. Pavlinov, T. Pawlak, T. Peitzmann, V. Perevoztchikov, C. Perkins, W. Peryt, V.A. Petrov, S.C. Phatak, R. Picha, M. Planinic, J. Pluta, N. Porile, J. Porter, A.M. Poskanzer, M. Potekhin, E. Potrebenikova, B.V.K.S. Potukuchi, D. Prindle, C. Pruneau, J. Putschke, G. Rakness, R. Raniwala, S. Raniwala, O. Ravel, R.L. Ray, S.V. Razin, D. Reichhold, J.G. Reid, J. Reinnarth, G. Renault, F. Retiere, A. Ridiger, H.G. Ritter, J.B. Roberts, O.V. Rogachevskiy, J.L. Romero, A. Rose, C. Roy, L. Ruan, M.J. Russcher, R. Sahoo, I. Sakrejda, S. Salur, J. Sandweiss, M. Sarsour, I. Savin, P.S. Sazhin, J. Schambach, R.P. Scharenberg, N. Schmitz, K. Schweda, J. Seger, I. Selyuzhenkov, P. Seyboth, E. Shahaliev, M. Shao, W. Shao, M. Sharma, W.Q. Shen, K.E. Shestermanov, S.S. Shimanskiy, E. Sichtermann, F. Simon, R.N. Singaraju, N. Smirnov, R. Snellings, G. Sood, P. Sorensen, J. Sowinski, J. Speltz, H.M. Spinka, B. Srivastava, A. Stadnik, T.D.S. Stanislaus, R. Stock, A. Stolpovsky, M. Strikhanov, B. Stringfellow, A.A.P. Suaide, E. Sugarbaker, M. Sumbera, B. Surrow, M. Swanger, T.J.M. Symons, A. Szanto De Toledo, A. Tai, J. Takahashi, A.H. Tang, T. Tarnowsky, D. Thein, J.H. Thomas, A.R. Timmins, S. Timoshenko, M. Tokarev, T.A. Trainor, S. Trentalange, R.E. Tribble, O.D. Tsai, J. Ulery, T. Ullrich, D.G. Underwood, G. Van Buren, N. Van Der Kolk, M. Van Leeuwen, A.M. Vander Molen, R. Varma, I.M. Vasilevski, A.N. Vasiliev, R. Vernet, S.E. Vigdor, Y.P. Viyogi, S. Vokal, S.A. Voloshin, W.T. Waggoner, F. Wang, G. Wang, G. Wang, X.L. Wang, Y. Wang, Y. Wang, Z.M. Wang, H. Ward, J.W. Watson, J.C. Webb, G.D. Westfall, A. Wetzler, C. A. Whitten Jr., H. Wieman, S.W. Wissink, R. Witt, J. Wood, J. Wu, N. Xu, Z. Xu, Z.Z. Xu, E. Yamamoto, P. Yepes, I.-K. Yoo, V.I. Yurevich, I. Zborovsky, H. Zhang, W.M. Zhang, Y. Zhang, Z.P. Zhang, C. Zhong, R. Zoulkarneev, Y. Zoulkarneeva, A.N. Zubarev, J.X. Zuo

Physics

We present first measurements of the pseudorapidity and azimuth (η, ϕ) binsize dependence of event-wise mean transverse-momentum ⟨p_t⟩ fluctuations for Au–Au collisions at √s_NN = 200 GeV. We invert that dependence to obtain p_t autocorrelations on differences (η_∆, ϕ_∆) interpreted to represent velocity/temperature distributions on (η, ϕ). The general form of the autocorrelations suggests that the basic correlation mechanism is parton fragmentation. The autocorrelations vary rapidly with collision centrality, which suggests that fragmentation is strongly modified by a dissipative medium in the more central Au–Au collisions relative to peripheral or p–p collisions.

Preventing Theft Of Quality Of Service On Open Platforms, Kwang-Hyun Baek, Sean W. Smith

Computer Science Technical Reports

As multiple types of traffic converge onto one network (frequently wireless), enterprises face a tradeoff between effectiveness and security. Some types of traffic, such as voice-over-IP (VoIP), require certain quality of service (QoS) guarantees to be effective. The end client platform is in the best position to know which packets deserve this special handling. In many environments (such as universities), end users relish having control over their own machines. However, if end users administer their own machines, nothing stops dishonest ones from marking undeserving traffic for high QoS. How can an enterprise ensure that only appropriate traffic receives high QoS, …

Measurements Of Bottom-Antibottom Azimuthal Production Correlations In Proton-Antiproton Collisions At √S =1.8 Tev, Darin Acosta, Kenneth A. Bloom, Collider Detector At Fermilab Collaboration

Kenneth Bloom Publications

We have measured the azimuthal angular correlation of b[overline b] production, using 86.5 pb^-1 of data collected by Collider Detector at Fermilab (CDF) in pp̅ collisions at sqrt(s)=1.8 TeV during 1994–1995. In high-energy pp̅ collisions, such as at the Tevatron, bb̅ production can be schematically categorized into three mechanisms. The leading-order (LO) process is "flavor creation," where both bb and b̅ quarks substantially participate in the hard scattering and result in a distinct back-to-back signal in final state. The "flavor excitation" and the "gluon splitting" processes, which appear at next-leading-order (NLO), are known to make a comparable contribution to …

Trans-Cis Isomerization And The Blue Phases, A. Chanishvili, G. Chilaya, G. Petriashvili, Peter J. Collings

Physics & Astronomy Faculty Works

A new class of photoactive chiral liquid crystals based on a photoactive nematic host material and a photoinactive chiral dopant was utilized to investigate the behavior of the blues phases when trans-cis isomerization is induced. While the general behavior follows what has been observed in the cholesteric phase, the sensitivity of the blue phases to external parameters causes different behavior when these systems are exposed to UV radiation. The results for four different mixtures are reported and include (1) modulation of the blue phase selective reflection wavelength with low levels of UV and visible light, (2) conversion of one blue …

Guest-Host Chemistry Of P-Sulfonatocalix[6]Arene And Nizatidine, Galia Debelouchina

Honors Theses

This work investigates the guest-host chemistry in water of p-sulfonatocalix[6]arene and a number of guests related to the amino acids arginine and lysine. Two questions are particularly important: what are the interactions that drive guest-host binding and what is the role of the solvent. The answers to these questions are investigated with isothermal titration calorimetry (lTC), which gives K, ?H, and ?S, and pressure perturbation calorimetry (PPC), which allows the calculation of the thermal coefficient of expansion ? and relating it to a molecule's structure-breaking or structure-making properties. The ITC data suggests that hydrogen bonding and charge-charge interactions are the …

Electrically Controlled Exchange Bias For Spintronic Applications, Christian Binek, A. Hochstrat, X. Chen, Pavel Borisov, Wolfman Kleemann, Bernard Doudin

Christian Binek Publications

Exchange coupling between a magnetoelectric (111)-oriented Cr₂O₃ single crystal and a CoPt multilayer with perpendicular anisotropy exhibits an exchange bias field proportional to the applied axial electric field. Extrapolation from bulk to thin film magnetoelectric pinning system suggests promising spintronic applications due to coupling between the electric field-controlled magnetization and the magnetization of a neighbor ferromagnetic layer. Pure voltage control of magnetic configurations of tunneling magnetoresistance spin valves is an attractive alternative to current-induced magnetization switching. ©2005 American Institute of Physics

Nondipole Effects In The Triply Differential Cross Section For Double Photoionization Of He, Andrei Y. Istomin, N. L. Manakov, A. V. Meremianin, Anthony F. Starace

Department of Physics and Astronomy: Faculty Publications

Lowest-order nondipole effects are studied systematically in double photoionization (DPI) of the He atom. Ab initio parametrizations of the quadrupole transition amplitude for DPI from the 1S0 state are presented in terms of the exact two-electron radial matrix elements. Analytic expressions for these matrix elements within lowest-order perturbation theory (LOPT) in the interelectron interaction are also given. The corresponding parametrizations for the dipole-quadrupole triply differential cross section (TDCS) are presented for the case of an elliptically polarized photon. A general analysis of retardation-induced asymmetries of the TDCS including the circular dichroism effect at equal energy sharing is presented. Numerical LOPT …

The Anomalous "Stiffness" Of Biphenydimethyldithiol, D.Q. Feng, Peter A. Dowben, R. Rajesh, Jody G. Redepenning

Peter Dowben Publications

Although organic adsorbates and thin films are generally regarded as "soft" materials, the effective Debye temperature, indicative of the dynamic motion of lattice normal to the surface, can be very high. For biphenyldimethyldithiol, the effective Debye temperature, determined from core level photoemission from the all carbon arene rings, is comparable to that of graphite. We associate this rigidity to the stiffness of the benzene rings, and the ordering in the molecular thin film. Measurements on the sulfur of poly(hexylthiophene) show that sulfur in an arene ring is less dominated by soft modes than the pendant sulfur of biphenyldimethyldithiol on the …

Temperature-Dependent Asymmetry Of The Nonlocal Spin-Injection Resistance: Evidence For Spin Nonconserving Interface Scattering, Samir Garzon, Igor Žutić, Richard A. Webb

Faculty Publications

We report nonlocal spin injection and detection experiments on mesoscopic Co-Al₂O₃-Cu spin valves. We have observed a temperature-dependent asymmetry in the nonlocal resistance between parallel and antiparallel configurations of the magnetic injector and detector. This strongly supports the existence of a nonequilibrium resistance that depends on the relative orientation of the detector magnetization and the nonequilibrium magnetization in the normal metal providing evidence for increasing interface spin scattering with temperature.

Pulsed System For Optical Discharge Of Thin-Film Insulators, Jared Otterstrom, Ryan C. Hoffman, Jr Dennison

Senior Theses and Projects

Much research is being performed in order to characterize the charging of spacecraft materials. The importance and applications of this research is numerous and especially useful to the development of satellites¹. The USU Materials Physics group is currently performing research in this field related to electron emission for spacecraft materials¹. This includes testing sample material in an ultra high vacuum chamber. A problem encountered in this testing is that negative charge can build up on the sample material and modify the electron emission measurements². To remedy this problem, my senior project was to develop, …

Study Of Deep Inelastic Inclusive And Diffractive Scattering With The Zeus Forward Plug Calorimeter, S. Chekanov, M. Derrick, S. Magill, S. Miglioranzi, B. Musgrave, J. Repond, R. Yoshida, Margarita C. K. Mattingly, N. Pavel, A. G. Yagües Molina, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, G. Cara Romeo, L. Cifarelli, F. Cindolo, A. Contin, M. Corradi, S. De Pasquale, P. Giusti, G. Iacobucci, A. Margotti, A. Montanari, R. Nania, F. Palmonari, A. Pesci, A. Polini

Faculty Publications

Deep inelastic scattering and its diffractive component, ep → e′ γ* p → e′ X N, have been studied at HERA with the ZEUS detector using an integrated luminosity of 4.2 pb-1. The measurement covers a wide range in the γ* p c.m. energy W (37-245 GeV), photon virtuality Q2 (2.2-80 GeV2) and mass MX (0.28-35 GeV). The diffractive cross section for MX > 2 GeV rises strongly with W; the rise is steeper with increasing Q2. The latter observation excludes the description of diffractive deep inelastic scattering in terms of the exchange of a single pomeron. The ratio of diffractive …

Water Current, Volume 37, No. 2. Spring 2005

Water Current Newsletter

• Gleick Headlines April Water Management and Policy Conference by Steve Ress

• Water and Natural Resources Tour Looks at LB962, Sandhills, Pine Ridge Issues by Steve Ress

• From the Director

• Meet the Faculty

• Holz Named Water Center Assistant Director

• Water Resources Research Initiative One of 11 “Programs of Excellence”

• Cooperative Extension Ready With Algae Test Kits by Steve Ress

• Blue-green Algae a Known Health Risk

• Revisions to Water Well Construction, Pump Installation and Water Well Decommissioning Standards by Sharon Skipton • “Optimizer” Computer Tool Helps With Crop Production Under Limited Irrigation By …

Improvement Of Long Range Order In Diblock Copolymer Templates For Nanostructure Deposition, Scott Michael Fontana

Doctoral Dissertations

This dissertation presents work that examines the use of polystyrene-b-poly(methyl methacrylate) (PS-b-PMMA) diblock copolymer thin films as nanoporous templates. Diblock copolymer thin films are able to microphase separate to produce microdomains on the nanometer length scale. Cylindrical domains can be perpendicularly oriented when cast as a thin film on a neutral surface. From the perpendicularly oriented cylindrical microdomains, nanoporous templates can be created.

Cylindrical domain block copolymer templates can lead to the production of nanostructures, but the lack of long range ordering prevents the use of diblock copolymer template for some industrial applications. Graphoepitaxy utilizes a …

Conservation Of Grassland Bird Populations On Military Installations In The Eastern United States With Special Emphasis On Fort Campbell Army Base, Kentucky, James J. Giocomo

Doctoral Dissertations

Grassland bird populations have decline significantly over the past 30 years because of the dramatic decrease of native grasslands through clearing of non-forested land for agriculture, and discontinued use of fire. It is imperative to understand the distribution and productivity of these birds and the potential for grassland management to enhance these declining populations, especially in land areas where the landuses may be compatible with grassland bird conservation.

This study was conducted to provide needed basic life history and nest site habitat use information as well as information about populations and potential region-wide habitat availability to enhance current and future …

Atomistic Investigation Of Anomalous Diffusion On Surfaces: A Deterministic Approach, James Wesley Mancillas

Doctoral Dissertations

The observation of anomalous diffusion rates on surfaces by recent experiments has renewed interest in diffusion mechanics. In order to provide a better understanding of the atomistic motions resulting in anomalous diffusion, we have investigated the diffusion dynamics of sodium on a copper surface using conservative molecular dynamics. The properties of diffusing adatoms transitioning between normal diffusive motion and anomalous motion have then been examined. Utilizing short time approximation Lyapunov exponents, stable cantori within chaotic manifolds are identified. At the periphery of these stable cantori from which anomalous diffusion originates, we have examined the transition properties of diffusive motions with …

Overcoming Statistical Error And Bias In Quantum Monte Carlo: Application To Metal-Doped Helium Clusters, Gary Lee Warren Jr.

Doctoral Dissertations

Quantum Monte Carlo (QMC) methods are a class of powerful computer simulation techniques for solving the many-body Schrӧdinger equation. These techniques deliver essentially exact results and boast favorable computational scaling with system size. Calculations provide a full quantum mechanical treatment and may be carried to arbitrary precision. These characteristics make QMC a promising choice for the investigation of doped helium clusters, where quantum effects are substantial.

Stochastic in nature, QMC methods are susceptible to statistical bias and error, which must be carefully controlled. Moreover, the relationship between the finite sampling error and the statistical uncertainty in observables has never been …

The Challenge Of Realizing Sustainable Natural Resource Management On Private Lands: Problems And Promise, Jamey L. Pavey

Doctoral Dissertations

Today’s natural resource problems are more complex than ever and many have yet to be effectively addressed in the United States by regulations or management policies. The challenges presented by these problems require new approaches to the governance of natural resources in the United States. These approaches must recognize that the governance of natural resources is not only a technical task, but a social process. The management of natural resources on private lands presents a unique set of problems and a unique set of opportunities to provide environmental benefits. However, without adequate incentives, landowners are unlikely to manage their land …

Syntheses, Structures, And Reactivities Of Early-Transition-Metal Silyl, Amide, And Imide Complexes, Xianghua Yu

Doctoral Dissertations

This dissertation describes syntheses, characterization, and reactivities of Groups 4 and 5 metal amide silyl complexes free of anionic π-ligands such as cyclopentadienyl (Cp).

A summary of the research in this dissertation is provided in Chapter 1. Chapter 2 reports unusual equilibria involving zirconium amides, silyl anions, and zirconium silyl complexes through amide-silyl ligand exchange reactions. Silyl anion SiBu^{tPh_{2− (}}2) was found to substitute an amide ligand in Zr(NMe2)4 (3) to give (Me2N)3Zr(SiButPh2)2− (1a) and Zr(NMe2)5− (1b) in THF. Silyl anion 2 also selectively attacks the –N(SiMe3)2 ligand in (Me2N)3Zr[N(SiMe3)2] …

Development Of Novel Synthetic Methods Utilizing Group Iii And Iv Reagents, Gang Dong

Doctoral Dissertations

This dissertation summarizes the development of novel synthetic methods involving Group III & IV reagents. These newly discovered reactions include the rhodium-catalyzed direct cross-coupling of allylic alcohols with aryl- and vinylboronic acids; palladium-catalyzed coupling reaction of Baylis-Hillman acetate adducts with both potassium organotrifluoroborate reagents and organosiloxanes; efficient syntheses of functionalized allylmetals such as allylboranes, allylsilanes, and allylgermanes; application of allylboranes to the synthesis of homoallylic alcohols; syntheses of 4-(1-alkynyl)-2(5H)-furanones and coumarins; utilization of potassium alkynyltrifluoroborates in the synthesis of conjugated enediynes; and application of potassium alkynyltrifluoroborates as reagents in the Petasis reaction.

The new synthetic methodologies involving Group III & …

Neutron Scattering Studies On Magnetism And Phonon In The Electron-Doped Nd2-Xcexcuo4 And Pr1-Xlacexcuo4, Hye Jung Kang

Doctoral Dissertations

We present comprehensive neutron scattering studies on the electron-doped superconductors Nd_2-xCe_xCuO₄ and Pr_1-xLaCe_xCuO₄ to understand how magnetic properties and phonon are related to superconductivity. For the superconducting Nd_1.85Ce_0.15CuO₄, a c-axis magnetic field enhances the commensurate antiferromagnetic order, while an ab-plane magnetic field induces spin-flop transition from the noncollinear to the collinear magnetic structure. The c-axis field-induced effect is absent in both the parent Nd₂CuO₄ and the as-grown nonsuperconducting Nd_1.85Ce_0.15CuO₄ samples. These results, combined …

Text Mining For Software Engineering: How Analyst Feedback Impacts Final Results, Jane Huffman Hayes, Alex Dekhtyar, Senthil Sundaram

Computer Science and Software Engineering

The mining of textual artifacts is requisite for many important activities in software engineering: tracing of requirements; retrieval of components from a repository; location of manpage text for an area of question, etc. Many such activities leave the “final word” to the analyst – have the relevant items been retrieved? are there other items that should have been retrieved? When analysts become a part of the text mining process, their decisions on the relevance of retrieved elements impact the final outcome of the activity. In this paper, we undertook a pilot study to examine the impact of analyst decisions on …

Stormwater Utility Fees: Considerations & Options For Interlocal Stormwater Working Group (Iswg), New England Environmental Finance Center

Water

Stormwater utilities are a concept whose time seems to have arrived. Established by relatively few communities in the 1970s as a method of funding flood control measures, stormwater utilities now exist in over 400 municipalities and counties throughout the United States. During the next 10 years, their numbers are expected to swell dramatically – by one estimate to over 2,000 by the year 2014.

The reasons for this growth are multifold. Federal stormwater regulations passed in the 1980s (Phase I of the National Pollutant Discharge Elimination System Program, or NPDES), motivated many larger communities to seek alternative funding sources and …

Crop Yield Response To Precision Deep Tillage, Larry G. Wells, Timothy S. Stombaugh, Scott A. Shearer

Biosystems and Agricultural Engineering Faculty Publications

Experimental precision deep tillage was applied at three sites in central Kentucky with relatively well-drained silt loam soils in no-till crop production. Fields were divided into 0.4 ha (1 ac) grid cells using DGPS mapping. Assessment of soil compaction by machinery traffic was made using multiple soil cone penetrometer measurements and expressed as cone index (CI). Corn, wheat, and soybean yields were depressed in grid cells with CI_avg ≥ 1.5 MPa (218 psi) prior to application of tillage treatments at sites 1 and 3, whereas at site 2, where most of the highest average CI values ranged from 1.44 …

A Secrecy Primer, David Hafemeister

Physics

As more countries acquire the scientific knowledge to build nuclear weapons, the U.S. response should not be heightened secrecy but a renewed commitment to strengthening political safeguards.

A Direct Comparison Of Conceptual Learning And Problem Solving Ability In Traditional And Studio Style Classrooms, Chance Hoellwarth, Matthew J. Moelter, Randall D. Knight

Physics

We present data on student performance on conceptual understanding and on quantitative problem-solving ability in introductory mechanics in both studio and traditional classroom modes. The conceptual measures used were the Force Concept Inventory and the Force and Motion Conceptual Evaluation. Quantitative problem-solving ability was measured with standard questions on the final exam. Our data compare three different quarters over the course of 2 years. In all three quarters, the normalized learning gain in conceptual understanding was significantly larger for students in the studio sections. At the same time, students in the studio sections performed the same or slightly worse on …