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Articles 1711 - 1740 of 3030
Full-Text Articles in Physical Sciences and Mathematics
Improved Soil Management And Cropping Systems For Waterlog-Prone Soils : Results Of The 1999 Season, Derk Bakker, Greg Hamilton, D Houlbrooke, Cliff Spann
Improved Soil Management And Cropping Systems For Waterlog-Prone Soils : Results Of The 1999 Season, Derk Bakker, Greg Hamilton, D Houlbrooke, Cliff Spann
Resource management technical reports
The project aim was to map the distribution of waterlogging occurrences relative to soil type and climate; to develop soil, water and crop management practices applied to the concept of raised beds to alleviate or prevent waterlogging; to establish the economics of raised bed farming, relative to geographic location and waterlogging frequency.
Energy Efficiency Can Help You Get A Home, Dennis Hinkamp
Energy Efficiency Can Help You Get A Home, Dennis Hinkamp
All Current Publications
It is a little known and seldom used financing tool, but Energy Efficient Mortgages (EEMs) can increase your buying power when looking for a home.
Ua12/2/1 College Heights Herald, Vol. 76, No. 34, Wku Student Affairs
Ua12/2/1 College Heights Herald, Vol. 76, No. 34, Wku Student Affairs
WKU Archives Records
WKU campus newspaper reporting campus, athletic and Bowling Green, Kentucky news. Articles in this issue:
- Karen, Mattias. Professor Trapped in Cave – Chris Groves
- Walsh, Erica. Elections May Go Online – Student Government Association
- Hoang, Mai Beauty King – Matt Curry, Mr. Hilltopper
- Western Grad Places Eighth in Hearst – Matt Batcheldor
- Forensics Team Wins Indiana Tournament
- Moore, Brian. Race Lawsuit File Full of Discrepancies, Contradictions – Robert Dye
- Football Players Deserve Rings
- Grady, Brian. Editorial Cartoon re: Football Championship Rings
- Conger, Aaron. Teachers Should Show Compassion
- Chaney, David. Intro to Toilet Flushing – General Education
- Moore, Conrad. Geography, Geology …
Starbursts Versus Truncated Star Formation In Nearby Clusters Of Galaxies, James A. Rose, Alejandro E. E. Gaba, Nelson Caldwell, Brian Chaboyer
Starbursts Versus Truncated Star Formation In Nearby Clusters Of Galaxies, James A. Rose, Alejandro E. E. Gaba, Nelson Caldwell, Brian Chaboyer
Dartmouth Scholarship
We present long-slit spectroscopy, B - and R -bandpass imaging, and 21 cm observations of a sample of early-type galaxies in nearby clusters, which are known to be either in a star-forming phase or to have had star formation that recently terminated. From the long-slit spectra, obtained with the Blanco 4 m telescope, we ‹nd that emission lines in the star-forming cluster galaxies are signi‹cantly more centrally concentrated than in a sample of ‹eld galaxies. The broadband imaging reveals that two currently starforming early-type galaxies in the Pegasus I cluster have blue nuclei, again indicating that recent star formation has …
Letcher County Water Quality Assessment, L. Ormsbee, E. Zechman
Letcher County Water Quality Assessment, L. Ormsbee, E. Zechman
Kentucky River Watershed Watch
No abstract provided.
Cryptanalysis Of Two Sparse Polynomial Based Public Key Cryptosystems, Feng Bao, Robert H. Deng, Willi Geiselmann, Claus Schnorr, Rainer Steinwandt, Hongjun Wu
Cryptanalysis Of Two Sparse Polynomial Based Public Key Cryptosystems, Feng Bao, Robert H. Deng, Willi Geiselmann, Claus Schnorr, Rainer Steinwandt, Hongjun Wu
Research Collection School Of Computing and Information Systems
The application of sparse polynomials in cryptography has been studied recently. A public key encryption scheme EnRoot [4] and an identification scheme SPIFI [1] based on sparse polynomials were proposed. In this paper, we show that both of them are insecure. The designers of SPIFI proposed the modified SPIFI [2] after Schnorr pointed out some weakness in its initial version. Unfortunately, the modified SPIFI is still insecure. The same holds for the generalization of EnRoot proposed in [2].
Utah State University Extension Addressing Energy Issues, Dennis Hinkamp
Utah State University Extension Addressing Energy Issues, Dennis Hinkamp
All Current Publications
No abstract provided.
Browsing Behaviour Of Awassi Ewes On Atriplex Nummularia, Raed Al-Tabini, A. Younger
Browsing Behaviour Of Awassi Ewes On Atriplex Nummularia, Raed Al-Tabini, A. Younger
Raed Al-Tabini
No abstract provided.
A2bi8se1 3 (A = Rb, Cs), Csbi3.67se6, And Babi2< /Inf>Se4: New Ternary Semiconducting Bismuth Selenides, Lykourgis Iordanidis, Paul Brazis, Theodora Kyratsi, John Irel, Melissa Lane, Carl Kannewurf, Wei Chen, Jeffrey Dyck, Ctirad Uher, Nishant Ghelani, Tim Hogan, Mercouri Kanatzidis
A2bi8se1 3 (A = Rb, Cs), Csbi3.67se6, And Babi2< /Inf>Se4: New Ternary Semiconducting Bismuth Selenides, Lykourgis Iordanidis, Paul Brazis, Theodora Kyratsi, John Irel, Melissa Lane, Carl Kannewurf, Wei Chen, Jeffrey Dyck, Ctirad Uher, Nishant Ghelani, Tim Hogan, Mercouri Kanatzidis
Jeffrey Dyck
No abstract provided.
Methods For Volume Measurement In 3d Images, Kevin J. Black
Methods For Volume Measurement In 3d Images, Kevin J. Black
Kevin J. Black, MD
Comparison Of Optical Density, Total Cell Protein, And Number Of Viable Cells (Via Fluorescent Straining) As Measures Of Microbial Growth Kinetics In Suspended And Biofilm Cultures During Biodegradation Of Naphthalene, Jeong Seop Shim
Dissertations
Most studies on bacterial growth kinetics have been dependent on theoretical modeling with general biomass measurements using either dry weight or optical density (OD), without distinguishing live from dead bacteria or debris. As a result, there remains considerable uncertainty in reliably predicting rates of biodegradation for design of treatment processes for environmental pollutants.
This research focused on measurement of bacterial growth rates and activities in suspended cultures and biofilms using Pseudomonas putida (ATCC 17484) for biodegradation of naphthalene. As expected, the rates of biodegradation differed between suspended and immobilized cultures. A comparison was made of the impact of three biomass …
A More Efficient Document Retrieval Method For Texpros, Yin Dong
A More Efficient Document Retrieval Method For Texpros, Yin Dong
Dissertations
Document processing is a critical element of office automation. Through document classification, extraction and filing, documents are automatically placed into a knowledge base according to certain rules. Document retrieval is a process to get a document back according to a user's requirements and to show the results to the user. Hence, a good user-interface and an efficient retrieval algorithm become core parts of document retrieval.
Unlike previous browsers that have been proposed for this purpose, this dissertation develops a new browser that has a user interface with more tools, and one that has a more efficient retrieval algorithm that can …
Environmental Science In The New Millennium : A Model To Give Structure And Guidance, James M. Lipuma
Environmental Science In The New Millennium : A Model To Give Structure And Guidance, James M. Lipuma
Dissertations
This work proposes a template for successful interdisciplinary Environmental Science (EVSQ) programs at four-year American learning institutions. The first conclusion reached is that there is no one "perfect" program. Only by identifying clear goals for EVSC can programs improve. It was determined that a clear definition of EVSC and mission statements related to these definitions are necessary first steps to allow improvement to occur. One major outcome of the work is the educational model built to understand EVSC education. The model identifies methods by which the goals and objectives of EVSC can be identified and accomplished. The research found that …
Multi-Mode Cavity Effects In The Microwave Heating Of A Ceramic Slab, Stuart J. Walker
Multi-Mode Cavity Effects In The Microwave Heating Of A Ceramic Slab, Stuart J. Walker
Dissertations
In order to gain insight into hot spot development in microwave heated ceramics, a partially insulated, two dimensional ceramic slab situated in a TEM01 cavity is modeled in the small Biot number limit. If the electrical conductivity is an exponential function of temperture and E0 is the strength of the incident mode, then the relationship between the spatially uniform, steady state leading order temperature, v8, and E01 is characterized by the well known bi-stable, or S shaped, response curve. The steady state second order temperature, v1, is described by a boundary …
Analysis Of Discrete Dynamical System Models For Competing Species, Jerry J. Chen
Analysis Of Discrete Dynamical System Models For Competing Species, Jerry J. Chen
Dissertations
A discrete version of the Lotka-Volterra (LV) differential equations for competing population species is analyzed in detail, much the same way as the discrete form of the logistic equation has been investigated as a source of bifurcation phenomena and chaotic dynamics. Another related system, namely, the Exponentially Self Regulating (ESR) population model, is also thoroughly analyzed. It is found that in addition to logistic dynamics - ranging from the very simple to manifestly chaotic regimes in terms of the governing parameters - the discrete LV model and the ESR model exhibit their own brands of bifurcation and chaos that are …
An Examination Of Discourse Concerned With Pcb Remediation In The Hudson River, Jennifer M. Coffey
An Examination Of Discourse Concerned With Pcb Remediation In The Hudson River, Jennifer M. Coffey
Theses
Remediation of PCB contamination in the Hudson River is an issue hotly contested within local communities, the media, and between government agencies and corporate entities. In recent years, the EPA has decided to revisit their 1984 no-action decision for the Hudson River and in December 2000, issued a Feasibility Study recommending partial dredging of the 200 miles of the Hudson floor deemed a Superfund site. The EPA's reevaluation of their 1984 decision has spurred an enormous amount of literature from corporate, non-profit volunteer, and government agencies.
The rhetorical theory of social constructionism and the ethical theory of environmental pragmatism are …
Towards Hypermedia Support In Database Systems, Anirban Bhaumik
Towards Hypermedia Support In Database Systems, Anirban Bhaumik
Theses
The general goal of our research is to automatically generate links and other hypermedia related services to analytical applications. Using a dynamic hypermedia engine (DHE), the following features have been automated for database systems. Based on the database's relational (physical) schema and its original (non-normalized) entity-relationship specification links are generated, database application developers may also specify the relationship between different classes of database elements. These elements can be controlled by the same or different database application, or even by another software system. A DHE prototype has been developed and illustrates the above for a relational database management system.
The DHE …
Managing Toxic And Hazardous Substances Of Concern In Manufacturing, Craig Jancerak
Managing Toxic And Hazardous Substances Of Concern In Manufacturing, Craig Jancerak
Theses
This thesis examined data management from an object relational database perspective. The database used was a product from Cornell University called PREDATOR. The context of the evaluation is the life-cycle of a manufactured product. The manufacturing life-cycle was chosen to correspond to an environmental life-cycle being done at NJIT. However, the goal was to use a generic model that could be applied to many situations.
The first phase developed the conceptual life-cycle model. At a high level, the model was not designed with a programming language in mind. Several questions needed to be answered and the a [sic] model answers …
Visualization Techniques For Routing Protocols And Router Configurations, Vandana Pursnani
Visualization Techniques For Routing Protocols And Router Configurations, Vandana Pursnani
Theses
An autonomous system (AS) is a group of routers managed by a particular organization. Exterior gateway protocols (EGP) are used between AS's Internal Gateway Protocols (IGP) is used within an AS. The most common protocols used with TCP/IP are RIP, OSPF (Open Shortest Path First), IGRP / Enhanced IGRP.
The thesis revolves around OSPF protocol OSPF uses flooding to exchange link-state updates between routers. Any change in routing information is flooded to all routers in the network. Areas are introduced to put a boundary on the explosion of link-state updates. Flooding and calculation of the Dijkstra algorithm on a router …
Mobile-Agent Versus Client/Server Performance: Scalability In An Information-Retrieval Task, Robert S. Gray, David Kotz, Ronald A. Peterson Jr, Peter Gerken, Martin Hofmann, Daria Chacon, Greg Hill, Niranjan Suri
Mobile-Agent Versus Client/Server Performance: Scalability In An Information-Retrieval Task, Robert S. Gray, David Kotz, Ronald A. Peterson Jr, Peter Gerken, Martin Hofmann, Daria Chacon, Greg Hill, Niranjan Suri
Computer Science Technical Reports
Mobile agents are programs that can jump from host to host in the network, at times and to places of their own choosing. Many groups have developed mobile-agent software platforms, and several mobile-agent applications. Experiments show that mobile agents can, among other things, lead to faster applications, reduced bandwidth demands, or less dependence on a reliable network connection. There are few if any studies of the scalability of mobile-agent servers, particularly as the number of clients grows. We present some recent performance and scalability experiments that compare three mobile-agent platforms with each other and with a traditional client/server approach. The …
Probing The Relative Timing Of Hydrogen Abstraction Steps In The Flavocytochrome B2 Reaction With Primary And Solvent Deuterium Isotope Effects And Mutant Enzymes, P. Sobrado, S. C. Daubner, P. F. Fitzpatrick
Probing The Relative Timing Of Hydrogen Abstraction Steps In The Flavocytochrome B2 Reaction With Primary And Solvent Deuterium Isotope Effects And Mutant Enzymes, P. Sobrado, S. C. Daubner, P. F. Fitzpatrick
Chemistry Faculty Research & Creative Works
Flavocytochrome b2 catalyzes the oxidation of lactate to pyruvate. Primary deuterium and solvent kinetic isotope effects have been used to determine the relative timing of cleavage of the lactate O - H and C - H bonds by the wild-type enzyme, a mutant protein lacking the heme domain, and the D282N enzyme. The DVmax and D(V/Klactate) values are both 3.0 with the wild-type enzyme at pH 7.5 and 25 °C, increasing to about 3.6 with the flavin domain and increasing further to about 4.5 with the D282N enzyme. Under these conditions, the D20Vmax values are 1.38, 1.18, and 0.98 for …
Topological Conjugacy And Rigidity Of Affine Actions., Siddhartha Bhattacharya Dr.
Topological Conjugacy And Rigidity Of Affine Actions., Siddhartha Bhattacharya Dr.
Doctoral Theses
The main theme of this thesis is topological classiication of aline Hows on homogeneous spaces and rigidity of equivariant continuous maps between such dows. Both these aspects have been extensively studied in the literature for subgroup actions (cf. [Be), [B-Dj and [Wi) and for automorphism flows of the cyclic group (cf. [Ar]. [K-R] and [C-S). We will consider similar questions in more general situations. A detailed outline is given below. For a topological group T, by a r-flow we mean pair (X,p), where X is a opological space and p is a continuous action of I on X. For any …
A Parameterised Algorithm For Mining Association Rules, N. Denwattana, J. R. Getta
A Parameterised Algorithm For Mining Association Rules, N. Denwattana, J. R. Getta
Faculty of Informatics - Papers (Archive)
A central part of many algorithms for mining association rules in large data sets is a procedure that finds so called frequent itemsets. This paper proposes a new approach to finding frequent itemsets. The approach reduces a number of passes through an input data set and generalises a number of strategies proposed so far. The idea is to analyse a variable number n of itemset lattice levels in p scans through an input data set. It is shown that for certain values of parameters (n,p) this method provides more flexible utilisation of fast access transient memory and faster elimination of …
Laser-Triggered Ion Acceleration And Table Top Isotope Production, K. Nemoto, Anatoly Maksimchuk, Sudeep Banerjee, K. Flippo, G. Mourou, Donald P. Umstadter, B. Yu. Bychenkov
Laser-Triggered Ion Acceleration And Table Top Isotope Production, K. Nemoto, Anatoly Maksimchuk, Sudeep Banerjee, K. Flippo, G. Mourou, Donald P. Umstadter, B. Yu. Bychenkov
Donald Umstadter Publications
We have observed deuterons accelerated to energies of about 2 MeV in the interaction of relativistically intense 10 TW, 400 fs laser pulse with a thin layer of deuterated polystyrene deposited on Mylar film. These high-energy deuterons were directed to the boron sample, where they produced ~105 atoms of positron active isotope 11C from the reaction 10B(d,n)11C. The activation results suggest that deuterons were accelerated from the front surface of the target.
The History Of South American Tropical Precipitation For The Past 25,000 Years, Paul A. Baker, Geoffrey O. Seltzer, Sherilyn C. Fritz, Robert B. Dunbar, Matthew J. Grove, Pedro M. Tapia, Scott L. Cross, Harold D. Rowe, James P. Broda
The History Of South American Tropical Precipitation For The Past 25,000 Years, Paul A. Baker, Geoffrey O. Seltzer, Sherilyn C. Fritz, Robert B. Dunbar, Matthew J. Grove, Pedro M. Tapia, Scott L. Cross, Harold D. Rowe, James P. Broda
Department of Earth and Atmospheric Sciences: Faculty Publications
Long sediment cores recovered from the deep portions of Lake Titicaca are used to reconstruct the precipitation history of tropical South America for the past 25,000 years. Lake Titicaca was a deep, fresh, and continuously overflowing lake during the last glacial stage, from before 25,000 to 15,000 calibrated years before the present (cal yr B.P.), signifying that during the last glacial maximum (LGM), the Altiplano of Bolivia and Peru and much of the Amazon basin were wetter than today. The LGM in this part of the Andes is dated at 21,000 cal yr B.P., approximately coincident with the global LGM. …
Geographic Information Systems Tools For Collecting And Accessing Arctic Bathymetry: International Bathymetric Chart Of The Arctic Ocean, Martin Jakobsson
Geographic Information Systems Tools For Collecting And Accessing Arctic Bathymetry: International Bathymetric Chart Of The Arctic Ocean, Martin Jakobsson
Center for Coastal and Ocean Mapping
No abstract provided.
Potential Phase Control Of Chromium Oxide Thin Films Prepared By Laser-Initiated Organometallic Chemical Vapor Deposition, Ruihua Cheng, C.N. Borca, Peter A. Dowben, Shane Stadler, Y.U. Idzerda
Potential Phase Control Of Chromium Oxide Thin Films Prepared By Laser-Initiated Organometallic Chemical Vapor Deposition, Ruihua Cheng, C.N. Borca, Peter A. Dowben, Shane Stadler, Y.U. Idzerda
Peter Dowben Publications
We have used laser-initiated chemical vapor deposition to grow the chromium oxide thin films through the oxidation of Cr(CO)6 in an oxygen environment. While both Cr2O3 and CrO2 are present in the film, the relative weight of each phase depends on the oxygen partial pressure. The Curie temperature of the film increases and approaches the bulk TC of CrO2 (397 K) as the partial oxygen pressure is increased. © 2001 American Institute of Physics. [DOI: 10.1063/1.1343846]
Comparison Of Aluminum And Sodium Doped Poly(Vinylidene Fluoride-Trifluoroethylene) Copolymers By X-Ray Photoemission Spectroscopy, B. Xu, Jaewu Choi, C.N. Borca, Peter A. Dowben, A.V. Sorokin, S.P. Palto, N.N. Petukhova, S.G. Yudin
Comparison Of Aluminum And Sodium Doped Poly(Vinylidene Fluoride-Trifluoroethylene) Copolymers By X-Ray Photoemission Spectroscopy, B. Xu, Jaewu Choi, C.N. Borca, Peter A. Dowben, A.V. Sorokin, S.P. Palto, N.N. Petukhova, S.G. Yudin
Peter Dowben Publications
The chemical interaction between the simple metals, aluminum and sodium, and crystalline copolymer thin films of vinylidene fluoride (70%) with trifluoroethylene (30%), has been studied using x-ray photoemission spectroscopy. Aluminum and sodium metalize the polymer differently and different binding sites for the two metals can be inferred from the corresponding core level shifts. Aluminum leads to enhanced screening of final photoemission states associated with the polymer, while sodium doping strongly influences the fluorine, but perturbs the carbon backbone only slightly. © 2001 American Institute of Physics. [DOI: 10.1063/1.1340858]
Aluminum Doping Of Poly(Vinylidene Fluoride With Trifluoroethylene) Copolymer, B. Xu, C.N. Borca, Stephen Ducharme, A.V. Sorokin, Peter A. Dowben, V.M. Fridkin, S.P. Palto, N.N. Petukhova, S.G. Yudin
Aluminum Doping Of Poly(Vinylidene Fluoride With Trifluoroethylene) Copolymer, B. Xu, C.N. Borca, Stephen Ducharme, A.V. Sorokin, Peter A. Dowben, V.M. Fridkin, S.P. Palto, N.N. Petukhova, S.G. Yudin
Peter Dowben Publications
The interface between aluminum and crystalline copolymer thin film of vinylidene fluoride (70%) with trifluoroethylene (30%) [PVDF-TrFE] has been studied. The ratio of carbon 1s and aluminum 2p core level photoemission peak intensities changes little with increasing emission angle after deposition of 5 Å aluminum on the surface of PVDF-TrFE. This indicates that the distribution of aluminum atoms in the copolymer film is quite uniform in the near surface region and that the interface between PVDF-TrFE and aluminum is not abrupt. There is evidence for changes in photohole screening with aluminum doping within the polymer film.
Aluminum Doping Of Poly„Vinylidene Fluoride, B. Xu, C.N. Borca, Stephen Ducharme, A.V. Sorokin, Peter A. Dowben, V.M. Fridkin, S.P. Palto, N.N. Petukhova, S.G. Yudin
Aluminum Doping Of Poly„Vinylidene Fluoride, B. Xu, C.N. Borca, Stephen Ducharme, A.V. Sorokin, Peter A. Dowben, V.M. Fridkin, S.P. Palto, N.N. Petukhova, S.G. Yudin
Stephen Ducharme Publications
The interface between aluminum and crystalline copolymer thin film of vinylidene fluoride (70%) with trifluoroethylene (30%) [PVDF-TrFE] has been studied. The ratio of carbon 1s and aluminum 2p core level photoemission peak intensities changes little with increasing emission angle after deposition of 5 Å aluminum on the surface of PVDF-TrFE. This indicates that the distribution of aluminum atoms in the copolymer film is quite uniform in the near surface region and that the interface between PVDF-TrFE and aluminum is not abrupt. There is evidence for changes in photohole screening with aluminum doping within the polymer film.