Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Environmental Sciences (648)
- Physics (552)
- Computer Sciences (449)
- Chemistry (412)
- Earth Sciences (348)
-
- Life Sciences (324)
- Engineering (304)
- Mathematics (269)
- Oceanography and Atmospheric Sciences and Meteorology (198)
- Social and Behavioral Sciences (180)
- Education (167)
- Science and Mathematics Education (128)
- Water Resource Management (119)
- Natural Resources Management and Policy (114)
- Geology (112)
- Astrophysics and Astronomy (111)
- Natural Resources and Conservation (97)
- Physical Chemistry (93)
- Soil Science (86)
- Statistics and Probability (84)
- Computer Engineering (83)
- Arts and Humanities (79)
- Materials Science and Engineering (77)
- Materials Chemistry (74)
- Environmental Health and Protection (72)
- Agriculture (68)
- Applied Mathematics (67)
- Oceanography (66)
- Electrical and Computer Engineering (64)
- Institution
-
- University of Nebraska - Lincoln (476)
- TÜBİTAK (190)
- Selected Works (117)
- William & Mary (85)
- Old Dominion University (81)
-
- Chinese Chemical Society | Xiamen University (77)
- University of Wollongong (70)
- Department of Primary Industries and Regional Development, Western Australia (67)
- Utah State University (67)
- Air Force Institute of Technology (63)
- University of Northern Iowa (63)
- Dartmouth College (62)
- Missouri University of Science and Technology (61)
- The University of Maine (61)
- Claremont Colleges (60)
- University of Nevada, Las Vegas (47)
- University of New Hampshire (45)
- Wright State University (43)
- Chulalongkorn University (39)
- California Polytechnic State University, San Luis Obispo (38)
- Singapore Management University (37)
- Washington University in St. Louis (37)
- New Jersey Institute of Technology (36)
- University of Kentucky (35)
- Portland State University (34)
- Brigham Young University (32)
- SelectedWorks (32)
- Nova Southeastern University (30)
- University of Massachusetts Amherst (28)
- Virginia Commonwealth University (28)
- Keyword
-
- Western Australia (44)
- Groundwater (34)
- Geology (31)
- Salinity (31)
- Hydrology (29)
-
- Hydrogeology (28)
- Drainage (26)
- Towns (24)
- Flooding (23)
- Mathematics (21)
- Research and Technical Reports (19)
- Virginia (19)
- Physics (17)
- 2001 (15)
- Groundwater recharge (15)
- Water quality (14)
- Engineering (12)
- Chemistry (11)
- Chemistry and Biochemistry (11)
- Computer Science (11)
- Conservation (11)
- Emissions (11)
- Environment (11)
- Management (11)
- Atmospheric chemistry (10)
- Data (10)
- Ecology (10)
- Invasive species (10)
- Kentucky (10)
- Pollutants (10)
- Publication
-
- United States Department of Agriculture Wildlife Services: Staff Publications (97)
- Journal of Electrochemistry (77)
- Faculty Publications (71)
- Theses and Dissertations (70)
- Turkish Journal of Physics (65)
-
- Turkish Journal of Chemistry (62)
- Faculty of Informatics - Papers (Archive) (59)
- Electronic Theses and Dissertations (55)
- Journal of the Iowa Academy of Science: JIAS (52)
- Dissertations, Theses, and Masters Projects (39)
- Thai Environment (39)
- Turkish Journal of Mathematics (38)
- All Computer Science and Engineering Research (35)
- Research Collection School Of Computing and Information Systems (35)
- Dartmouth Scholarship (34)
- Physics Faculty Publications (34)
- Physics Faculty Research & Creative Works (34)
- Reports (33)
- Resource management technical reports (33)
- Humanistic Mathematics Network Journal (31)
- 2001 Bird Strike Committee-USA/Canada, Third Joint Annual Meeting, Calgary, AB (29)
- Theses (29)
- Dissertations (28)
- Conference on Applied Statistics in Agriculture (24)
- Department of Earth and Atmospheric Sciences: Faculty Publications (23)
- United States Geological Survey: Staff Publications (23)
- All HMC Faculty Publications and Research (22)
- Center for Coastal and Ocean Mapping (21)
- Department of Computer Science Technical Reports (21)
- Kenneth Bloom Publications (21)
- Publication Type
- File Type
Articles 1171 - 1200 of 3030
Full-Text Articles in Physical Sciences and Mathematics
Journal Review: Third International Anthology On Paradoxism, Joanne Growney
Journal Review: Third International Anthology On Paradoxism, Joanne Growney
Humanistic Mathematics Network Journal
No abstract provided.
Students And Their Learning From Reading, Chris Fenwick
Students And Their Learning From Reading, Chris Fenwick
Humanistic Mathematics Network Journal
My aim in this article is to summarize work I have done over the last three years, focusing on the issue of helping students learn from whatever mathematics text they read. Although these types of texts generally contain 3 modes of communication, namely technical English, the language of mathematics itself and diagrams, I will focus this article only on the technical English of such texts. The idea, then, that students can develop techniques and strategies for learning from what they read is generally known as “reading to learn.”
Funny Problems, Florentin Smarandache
Funny Problems, Florentin Smarandache
Humanistic Mathematics Network Journal
No abstract provided.
A Note On The Decimal Numeral System, Shaharir Bin Mohamad Zain
A Note On The Decimal Numeral System, Shaharir Bin Mohamad Zain
Humanistic Mathematics Network Journal
No abstract provided.
Real Numbers, Math Lives, Arnold L. Trindade
Real Numbers, Math Lives, Arnold L. Trindade
Humanistic Mathematics Network Journal
No abstract provided.
Wildlife Damage News, Volume 1, Spring 2001
Wildlife Damage News, Volume 1, Spring 2001
Wildlife Damage News
CONTENTS: The Northeast Wildlife Damage Management Research and Outreach Cooperative by Paul Curtis, Cornell University and Gary San Julian, Penn State University, Co-Directors Bats in the Attic Review of Current Literature Excerpted by Kristi Sullivan, Wildlife Communication Specialist Castelli, P.M. and S.E. Sleggs. Wildlife Damage Management Fact Sheet Series (2001) by Paul Curtis and Kristi Sullivan Managing Nuisance Beavers Along Roadsides (2000) by Paul Jensen, Paul Curtis and D. Hamelin Managing White-tailed Deer in Suburban Environments: a Technical Guide (2000) by Anthony DeNicola, Kurt VerCauteren, Paul Curtis, and Scott Hygnstrom Managing Canada Geese in Urban Environments (1999): a Technical Guide …
Government Sponsored Perversity. Review Of: Perverse Subsidies: How Tax Dollars Can Undercut The Environment And The Economy By Norman Myers And Jennifer Kent, Robert Costanza
Institute for Sustainable Solutions Publications and Presentations
Book review of Perverse Subsidies: How Tax Dollars Can Undercut the Environment and the Economy. Norman Myers and Jennifer Kent. Island Press, Washington (DC), 2001.
A Natural Channel Design To Restore The Greenwater River, Washington, Gregory J. Laurie
A Natural Channel Design To Restore The Greenwater River, Washington, Gregory J. Laurie
All Graduate Plan B and other Reports, Spring 1920 to Spring 2023
Channelization of the Greenwater River has resulted in a loss of habitat for Chinook salmon, a species listed as threatened under the Endangered Species Act. In order to restore habitat for fish and other aquatic organisms, a design was developed to restore meanders to the original floodplain. The channel design process began at the watershed scale, and progressed down to the scale of the stream channel. A twelve-step design process was followed that considered the influence of watershed disturbances on channel forming processes. Trends in sediment yield were assessed using an existing landslide inventory, and changes in channel pattern were …
Automatic Detection Of Outliers In Multibeam Echo Sounding Data, Tianhang Hou, Lloyd C. Huff, Larry A. Mayer
Automatic Detection Of Outliers In Multibeam Echo Sounding Data, Tianhang Hou, Lloyd C. Huff, Larry A. Mayer
Center for Coastal and Ocean Mapping
The data volumes produced by new generation multibeam systems are very large, especially for shallow water systems. Results from recent multibeam surveys indicate that the ratio of the field survey time, to the time used in interactive editing through graphical editing tools, is about 1:1. An important reason for the large amount of processing time is that users subjectively decide which soundings are outliers. There is an apparent need for an automated approach for detecting outliers that would reduce the extensive labor and obtain consistent results from the multibeam data cleaning process, independent of the individual that has processed the …
Perfect Reconstruction Integer-Modulated Filter Banks, Alfred Mertins, T. Karp
Perfect Reconstruction Integer-Modulated Filter Banks, Alfred Mertins, T. Karp
Faculty of Informatics - Papers (Archive)
In this paper, we present design methods for perfect reconstruction (PR) integer-modulated filter banks, including biorthogonal (low-delay) filter banks. Both the prototype filter and the modulation sequences are composed of integers, thus allowing,efficient hardware implementations. To derive such filter banks, we first extend the PR conditions known for cosine modulation to other, more general, modulation schemes. We present solutions where the PR conditions on the prototype and the modulation are entirely decoupled and where some simple coupling is introduced. The conditions are derived for both even and odd numbers of channels. Design examples are presented for both cases.
Structure Of The Internet?, Ah Chung Tsoi
Structure Of The Internet?, Ah Chung Tsoi
Faculty of Informatics - Papers (Archive)
We consider a major component in the design of an Internet search engine, viz., how the relevance of a Web page can be determined. A number of methods are described. A number of design issues related to search engines are also discussed.
Search Behavior In A Research Oriented Digital Library, Malika Mahoui, Sally Jo Cunningham
Search Behavior In A Research Oriented Digital Library, Malika Mahoui, Sally Jo Cunningham
Department of Computer Science Technical Reports
No abstract provided.
Ecological Implications Of Rockweed, Ascophyllum Nodosum (L.) Le Jolis, Harvesting, Jill C. Fegley
Ecological Implications Of Rockweed, Ascophyllum Nodosum (L.) Le Jolis, Harvesting, Jill C. Fegley
Electronic Theses and Dissertations
Harvesting of natural resources usually entails substantial removal of the target species. Where such species are dominant members of natural communities, their removal can have important consequences for their own regeneration as well as for the species assemblages associated with them. Rockweed is an ecologically and commercially important intertidal alga in the North Atlantic, and is increasingly being harvested in Maine. The effects of harvesting on regrowth are well known but little is known about its effects on the species that use this alga as habitat. This research focused on the ecological implications of A. nodosum harvesting on the associated …
Hydroacoustic Detection Of Submarine Landslides On Kilauea Volcano, Jacqueline Caplan-Auerbach, Christopher G. Fox, Frederick K. Duennebier
Hydroacoustic Detection Of Submarine Landslides On Kilauea Volcano, Jacqueline Caplan-Auerbach, Christopher G. Fox, Frederick K. Duennebier
Geology Faculty Publications
Landslides produced at the site where lava flows into the ocean at Kilauea volcano have been detected hydroacoustically. Up to 10 landslides per day were detected by a hydrophone on the Hawaii Undersea Geo-Observatory (HUGO), located 50 km south of the entry site. The largest of these landslides, partly subaerial events known as bench collapses, were detected by a network of hydrophones in the eastern Pacific, 5000–7000 km away from the source. The landslides display a characteristic spectral signature easily recognizable among other signals such as earthquake T-phases and anthropogenic noises. The fact that signals are detected at great distances …
Ecology Of Treeline Whitebark Pine (Pinus Albicaulis) Populations In Central Idaho: Successional Status, Recruitment, And Mortality, And A Spring Temperature Reconstruction From Whitebark Pine Tree Rings, Dana Lee Perkins
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
This research investigated the successional status of treeline whitebark pine (Pinus albicaulis) populations on 14 stands in central Idaho and used empirical statistical models to determine the principal factors affecting recruitment and mortality. The longest lived whitebark pines from four additional high-elevation sites were used to develop a tree-ring chronology to reconstruct over 1,000 years of average April-May temperature.
The assessment of stand structures using size-frequency distributions generally provides evidence that treeline whitebark pine populations are currently self-sustaining in areas of low to nonexistent incidence of white pine blister rust (Cronartium ribicola). However the presence of …
Controls On Channel Organization And Morphology In A Glaciated Basin In The Uinta Mountains, Utah, Betty E. Paepke
Controls On Channel Organization And Morphology In A Glaciated Basin In The Uinta Mountains, Utah, Betty E. Paepke
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The organization and morphology of Middle Fork Sheep Creek and South Fork Sheep Creek, two mountain streams in the upper Sheep Creek basin, are controlled by the spatial distribution of glacial moraines. Both channels are organized into a reoccurring sequence of steep-gradient reaches changing downstream to low-gradient reaches. Steep-gradient reaches are located where the channels flow through moraine s. Low-gradient reaches are located in meadows downstream of the steep-gradient reaches and immediately upstream of the next moraine. Knickpoints in the longitudinal profiles of both streams coincide with the location of moraines.
Large boulder s, beyond the size transportable by the …
Overview Of Acousto-Optic Bistability, Chaos, And Logical Applications, Monish Ranjan Chatterjee, Erol Sonmez
Overview Of Acousto-Optic Bistability, Chaos, And Logical Applications, Monish Ranjan Chatterjee, Erol Sonmez
Electrical and Computer Engineering Faculty Publications
An overview is presented of the key results in the field of acousto-optic bistability in the past two decades. It is shown that the basic acousto-optic bistable device may be described as a nonlinear dynamical system which satisfies a quadratic map. Thereafter, details are presented of several analytical methods, computer modeling approaches, including the SPICE circuit modeling technique, and experiments that have been used to understand the phenomenon.
Extensions to logical and digital applications are also discussed.
On Defending Against Distribtued Denial- Of-Service Attacks With Server-Centric Router Throttles, David K.Y. Yau, Feng Liang, John C. S. Lui
On Defending Against Distribtued Denial- Of-Service Attacks With Server-Centric Router Throttles, David K.Y. Yau, Feng Liang, John C. S. Lui
Department of Computer Science Technical Reports
No abstract provided.
Sew Representation For Low Rate Wi Coding, J. Lukasiak, I. S. Burnett
Sew Representation For Low Rate Wi Coding, J. Lukasiak, I. S. Burnett
Faculty of Informatics - Papers (Archive)
This paper considers low-rate waveform interpolation (WI) coding. It compares the existing, common slowly evolving waveform (SEW) quantisation scheme with two new schemes for representing and quantising the SEW. The first scheme uses a minimum phase estimate to reconstruct the SEW whilst the second scheme uses a pulse model whose parameters are implicitly transmitted in the quantised rapidly evolving waveform (REW). These new schemes maintain or reduce the bit rate required for transmission of the SEW. Results indicate that, for low rate WI coding, necessarily coarse SEW magnitude spectrum quantisation limits the contribution of the SEW to perceptual quality. Perceptual …
Audio Coding Using Sorted Sinusoidal Parameters, Mohammed Raad, I. Burnett
Audio Coding Using Sorted Sinusoidal Parameters, Mohammed Raad, I. Burnett
Faculty of Informatics - Papers (Archive)
This paper describes a new audio coding scheme based on sinusoidal coding of signals. Sinusoidal coding permits the representation of a given signal through the summation of sinusoids. The parameters of the sinusoids (the amplitudes, phases and frequencies) are transmitted to allow the signal reconstruction. In the proposed scheme, the sinusoidal parameters are sorted according to energy content and perceptual significance. The most significant parameters are transmitted first allowing the use of only a small set of the parameters for signal reconstruction. The proposed scheme incurs a low delay and uses a 20 ms frame length. Results show that the …
Detection Of Changes In Financial Time Series, Rich Madsen
Detection Of Changes In Financial Time Series, Rich Madsen
All Graduate Plan B and other Reports, Spring 1920 to Spring 2023
The purpose of this paper is to examine and model data from several years of foreign currency trading, to determine if one or more change points has occured in the data, and to estimate when those change points took place. Leading up to the analysis of the data we will construct and develop several statistics which we will use to determine if a change point has occured.
This paper falls into the area of computational statistics and will make use of Splus and the S+GARCH module within Splus. Heavy use will also be made of C++. The models that we …
The Response Of First And Second Order Streams To Urban Land-Use In Maine, U.S.A., Chandler Morse
The Response Of First And Second Order Streams To Urban Land-Use In Maine, U.S.A., Chandler Morse
Electronic Theses and Dissertations
Physical, chemical, and biological characteristics of streams draining 20 catchments in Maine, U.S.A were compared to determine the influence of increasing urban intensity on stream ecosystem structure. The catchments had varying levels of urban land-use (percentage of the total impervious area within the catchment) ranging from 1-31%. Stream habitat quality, stability, and water quality consistently decreased as the proportion of impervious surface area increased within the catchment. .Indices based on stream benthic macroinvertebrate communities showed even stronger declines as a function of increasing impervious area in the study catchments. Streams draining catchments with levels of impervious surfaces <6% had higher levels of both total and Ephemeroptera + Plecoptera + Trichoptera (EPT) taxonomic richness. With increased levels of urban intensity, benthic macroinvertebrate communities in streams were characterized by decreased numbers of sensitive taxa. Taxa considered to be moderately sensitive to anthropogenic stress (e.g. Acerpenna (Ephemeroptera), Paracapnia …6%>
Numerical Modeling Of Magnetohydrodynamic Activity In The Swarthmore Spheromak Experiment, Vyacheslav S. Lukin , '00, G. Qin, W. H. Matthaeus, Michael R. Brown
Numerical Modeling Of Magnetohydrodynamic Activity In The Swarthmore Spheromak Experiment, Vyacheslav S. Lukin , '00, G. Qin, W. H. Matthaeus, Michael R. Brown
Physics & Astronomy Faculty Works
Results from a three-dimensional axisymmetric resistive magnetohydrodynamic (MHD) simulation are compared to experimental data from the Swarthmore Spheromak Experiment (SSX) [M. R. Brown, Phys. Plasmas 6, 1717 (1999)]. The MHD simulation is run under conditions and with dimensionless parameters similar to the experiment (Lundquist number S=1000, plasma beta beta =0.1). The simulation is shown to reproduce global equilibrium magnetic field profiles of the spheromaks as well as much of the detailed reconnection dynamics measured when two spheromaks are merged. It is concluded that SSX merger dynamics may be characterized as MHD reconnection, with the likelihood that extensions are needed to …
A Surface Insulator-To-Conductor Phase Transition In Colossal Magnetoresistive Manganese Perovskites Thin Films, C.N. Borca, Bo Xu, Takashi Komesu, Hae-Kyung Jeong, Sy-Hwang Liou, Peter A. Dowben
A Surface Insulator-To-Conductor Phase Transition In Colossal Magnetoresistive Manganese Perovskites Thin Films, C.N. Borca, Bo Xu, Takashi Komesu, Hae-Kyung Jeong, Sy-Hwang Liou, Peter A. Dowben
Peter Dowben Publications
We have observed a distinct surface phase transition for an important class of colossal magnetoresistive materials, La0.65D0.35MnO3 (with D = Sr, Pb) occurring in a surface layer compositionally different from the bulk. The surface phase transition occurs around 240 K compared to 350 K for the bulk and is fundamentally different. In the bulk, a ferromagnetic metal to paramagnetic ‘bad metal’ occurs, while the lower-temperature surface transition is from an n-type (in case of La0.65Sr0.35MnO3) or a p-type (in case of La0.65Pb0.35MnO3 …
A Landau-Ginzburg Description Of Sb Overlayers, Ralph Skomski, T. Komesu, H.-K. Jeong, C.N. Borca, Peter A. Dowben, D. Ristoiu, J.P. Nozieres
A Landau-Ginzburg Description Of Sb Overlayers, Ralph Skomski, T. Komesu, H.-K. Jeong, C.N. Borca, Peter A. Dowben, D. Ristoiu, J.P. Nozieres
Peter Dowben Publications
The spin polarization of Sb overlayers on the semi-Heusler alloy NiMnSb is investigated in terms of the Landau-Ginzburg approach. The half-metallic semi-Heusler alloy NiMnSb acts as a ferromagnetic perturbation and induces a spin polarization in the semimetallic Sb overlayer. Using a Gaussian approximation, the propagation of the spin perturbation in the overlayer is calculated. The results are compared with spin-polarized inverse photoemission spectroscopy (SPIPES) results and with recent spin-dependent envelope-function approximation (SDEFA) predictions. The Landau-Ginzburg parameters are both band-structure and temperature dependent, and it is argued that thermal spin excitations lead to an injection depth decreasing as 1//T law at …
Quantifying Groundwater Discharge Through Fringing Wetlands To Estuaries: Seasonal Variability, Methods Comparison, And Implications For Wetland-Estuary Exchange, Cr Tobias, Jw Harvey, Iris C. Anderson
Quantifying Groundwater Discharge Through Fringing Wetlands To Estuaries: Seasonal Variability, Methods Comparison, And Implications For Wetland-Estuary Exchange, Cr Tobias, Jw Harvey, Iris C. Anderson
VIMS Articles
Because groundwater discharge along coastal shorelines is often concentrated in zones inhabited by fringing wetlands, accurately estimating discharge is essential for understanding its effect on the function and maintenance of these ecosystems. Most previous estimates of groundwater discharge to coastal wetlands have been temporally limited and have used only a single approach to estimate discharge. Furthermore, groundwater input has not been considered as a major mechanism controlling pore-water flushing. We estimated seasonally varying groundwater discharge into a fringing estuarine wetland using three independent methods (Darcy's Law, salt balance, and Br- tracer). Seasonal patterns of discharge predicted by both Darcy's Law …
Magnetic Resonance Imaging And Three-Dimensional Reconstructions Of The Brain Of A Fetal Common Dolphin, Delphinus Delphis, Lori Marino, Timothy L. Murphy, Lyad Gozal, John I. Johnson
Magnetic Resonance Imaging And Three-Dimensional Reconstructions Of The Brain Of A Fetal Common Dolphin, Delphinus Delphis, Lori Marino, Timothy L. Murphy, Lyad Gozal, John I. Johnson
Veterinary Science and Medicine Collection
To demonstrate the kinds of data that can be obtained non-destructively and non-invasively from preserved museum specimens using modern imaging technology the head region of a whole body fetal specimen of the common dolphin, Delphinus delphis, aged 8–9 months post-conception, was scanned using Magnetic Resonance Imaging (MRI). Series of scans were obtained in coronal, sagittal and horizontal planes. A digital three-dimensional reconstruction of the whole brain was prepared from the coronal series of scans. Sectional areas and three-dimensional volumes were obtained of the cerebral hemispheres and of the brainstemplus-cerebellum. Neuroanatomical features identified in the scans include the major sulci of …
Mathematical Constance (A Poem Dedicated To Constance Reid), Arthur T. Benjamin
Mathematical Constance (A Poem Dedicated To Constance Reid), Arthur T. Benjamin
All HMC Faculty Publications and Research
Mathematical Constance (A Poem Dedicated to Constance Reid)
I think that I shall never see
A constant lovelier than e,
Whose digits are too great too state,
They're 2.71828…
And e has such amazing features
It's loved by all (but mostly teachers).
With all of e's great properties
Most integrals are done with … ease.
Theorems are proved by fools like me
But only Euler could make an e.
I suppose, though, if I had to try
To choose another constant, I
Might offer i or phi or pi.
But none of those would satisfy.
Of all the …
On D0 Brane Polarization By Tidal Forces, Vatche Sahakian
On D0 Brane Polarization By Tidal Forces, Vatche Sahakian
All HMC Faculty Publications and Research
Gravitational tidal forces may induce polarization of D0-branes, in analogy to the same effects arising in the context of constant background gauge fields. Such phenomena can teach us about the correspondence between smooth curved spacetime and its underlying non-commutative structure. However, unlike polarization by gauge fields, the gravitational counterpart involves concerns regarding the classical stability of the corresponding polarized states. In this work, we study this issue with respect to the solutions presented in hepth0010237 and find that they are classically unstable. The instability however appears with intricate features with all but a few decay channels being lifted. Through a …
There Really Are No Contradictions: A Response, Calvin Jongsma
There Really Are No Contradictions: A Response, Calvin Jongsma
Faculty Work Comprehensive List
Response to "There are no Contradictions" by T.G. Ammon in The College Mathematics Journal, Vol. 31, No. 1 (Jan., 2000), pp. 48-49 which was part of the "Fallacies, Flaws, and Flimflam" column edited by Ed Barbeau of the Department of Mathematics at the University of Toronto.