Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Physics (879)
- Computer Sciences (719)
- Environmental Sciences (282)
- Mathematics (223)
- Engineering (202)
-
- Software Engineering (197)
- Chemistry (182)
- Earth Sciences (175)
- Life Sciences (159)
- Statistics and Probability (159)
- Astrophysics and Astronomy (94)
- Graphics and Human Computer Interfaces (85)
- Artificial Intelligence and Robotics (79)
- Soil Science (78)
- Biochemistry, Biophysics, and Structural Biology (69)
- Biochemistry (67)
- Other Computer Sciences (67)
- Social and Behavioral Sciences (58)
- Optics (56)
- Polymer Chemistry (56)
- Environmental Monitoring (55)
- Other Physics (52)
- Computer Engineering (50)
- Atomic, Molecular and Optical Physics (49)
- Applied Statistics (48)
- Sustainability (48)
- Electrical and Computer Engineering (46)
- Oceanography and Atmospheric Sciences and Meteorology (46)
- Applied Mathematics (45)
- Keyword
-
- Galaxies (32)
- Machine Learning (28)
- Statistics (25)
- Physics (21)
- Seyfert (21)
-
- Simulation (18)
- Spr_stu (18)
- Quasars (17)
- Data (16)
- Education (16)
- Machine learning (16)
- Agents (15)
- Spr_fac (14)
- Computer Vision (13)
- Sustainability (13)
- Active galactic nuclei (12)
- Deep Learning (12)
- Ontology (12)
- Soil (12)
- California (11)
- Graphics (11)
- Information (11)
- Optics (11)
- Artificial Intelligence (10)
- Astronomy (10)
- SOFIA (10)
- Supermassive black holes (10)
- Android (9)
- Modeling (9)
- NASA (9)
- Publication
-
- Physics (842)
- Master's Theses (351)
- Computer Science and Software Engineering (333)
- STAR Program Research Presentations (191)
- Natural Resources Management and Environmental Sciences (141)
-
- Mathematics (123)
- Statistics (107)
- Collaborative Agent Design (CAD) Research Center (103)
- Chemistry and Biochemistry (60)
- Research Scholars in Residence (57)
- Earth and Soil Sciences (52)
- Computer Engineering (49)
- Master of Science in Environmental Sciences and Management Projects (35)
- Mechanical Engineering (11)
- Social Sciences (10)
- Liberal Arts and Engineering Studies (9)
- Materials Engineering (9)
- College of Engineering Summer Undergraduate Research Program (8)
- Electrical Engineering (8)
- Graphic Communication (7)
- Agricultural Education and Communication (5)
- Construction Management (5)
- Feminist Pedagogy (4)
- Office of the Provost Scholarship (4)
- Aerospace Engineering (3)
- Horticulture and Crop Science (3)
- Industrial Technology and Packaging (3)
- Animal Science (2)
- Architectural Engineering (2)
- Biological Sciences (2)
- Publication Type
- File Type
Articles 2101 - 2130 of 2553
Full-Text Articles in Physical Sciences and Mathematics
Modeling An Algebraic Stepper, John Clements, Mathew Flatt, Matthias Felleisen
Modeling An Algebraic Stepper, John Clements, Mathew Flatt, Matthias Felleisen
Computer Science and Software Engineering
Programmers rely on the correctness of the tools in their programming environments. In the past, semanticists have studied the correctness of compilers and compiler analyses, which are the most important tools. In this paper, we make the case that other tools, such as debuggers and steppers, deserve semantic models, too, and that using these models can help in developing these tools. Our concrete starting point is the algebraic stepper in DrScheme, our Scheme programming environment. The algebraic stepper explains a Scheme computation in terms of an algebraic rewriting of the program text. A program is rewritten until it is in …
Above‐Threshold Ionization As A Probe Of Multielectron Physics, L. D. Van Woerkom, M. J. Nando, M. A. Walker, G. D. Gillen, H. G. Muller
Above‐Threshold Ionization As A Probe Of Multielectron Physics, L. D. Van Woerkom, M. J. Nando, M. A. Walker, G. D. Gillen, H. G. Muller
Physics
The study of above-threshold ionization (ATI) is now over 20 years old and much has been learned about the interaction of a single atomic electron with intense laser fields. The development of stable, high repetition rate ultrashort pulse laser systems has allowed experiments to probe intricate details of the ionization process using photoelectron and photoion spectroscopies. To date the overwhelming majority of data show that intense laser fields interact with only a single electron at a time to produce the well known features in electron kinetic energy spectra. We will present an overview of state-of-the-art experiments in ATI and show …
Higher Twist Contributions To R-Hadron Phenomenology In The Light Gluino Scenario, Thomas D. Gutierrez, R. Vogt, J. F. Gunion
Higher Twist Contributions To R-Hadron Phenomenology In The Light Gluino Scenario, Thomas D. Gutierrez, R. Vogt, J. F. Gunion
Physics
The open light gluino window allows non-trivial higher-twist gluino contributions to the proton wave function. Using a two-component model originally developed for charm hadroproduction, higher-twist intrinsic gluino contributions to final-state R-hadron formation are shown to enhance leading-twist production in the forward xnF region. We calculate R-hadron production at Pnlab=800 GeV in pp, pBe, and pCu interactions with light gluino masses of 1.2, 1.5, 3.5, and 5.0 GeV.
Electrical Feedthrough And Its Preparation, Leonard E. Peck, Timothy S. Romano, Tom K. Evans, Gary B. Hughes, Karl H. Neumann
Electrical Feedthrough And Its Preparation, Leonard E. Peck, Timothy S. Romano, Tom K. Evans, Gary B. Hughes, Karl H. Neumann
Statistics
An electrical feedthrough (34) is prepared by furnishing an aluminum oxide feedthrough plate (70) and at least one feedthrough pin (80) having a length greater than the thickness of the feedthrough plate (70). A pin bore (78) is formed through the feedthrough plate (70) for each feedthrough pin (80). Each pin bore (78) has a pin bore (78) size greater than the feedthrough pin (80) size, preferably by an amount no greater than that required to permit the penetration of a brazing metal (88) between the pin bore (78) and the feedthrough pin (80). Each feedthrough pin (80) is inserted …
Seaway: A Multi-Agent Decision-Support System For Naval Expeditionary Logistic Operations, Anthony Wood, Kym Jason Pohl, Justin Crawford, Mark Lai, John Fanshier, Ken Cudworth, Tom Tate, Hisham Assal, Shawn Pan, Jens G. Pohl
Seaway: A Multi-Agent Decision-Support System For Naval Expeditionary Logistic Operations, Anthony Wood, Kym Jason Pohl, Justin Crawford, Mark Lai, John Fanshier, Ken Cudworth, Tom Tate, Hisham Assal, Shawn Pan, Jens G. Pohl
Collaborative Agent Design (CAD) Research Center
This report describes work performed by CDM Technologies Inc. in conjunction with the Collaborative Agent Design (CAD) Research Center of California Polytechnic State University (Cal Poly), San Luis Obispo, for the Office of Naval Research (ONR), on the SEAWAY experimental system for planning, gaming and executing maritime logistic operations from a sea base. SEAWAY incorporates three fundamental concepts that distinguish it from existing (i.e., legacy) command and control applications. First, it is a collaborative system in which computer-based agents assist human operators by monitoring, analyzing and reasoning about events in near real-time. Second, SEAWAY includes an ontological model of the …
A Discotic Disguised As A Smectic: A Hybrid Columnar Bragg Glass, Karl Saunders, Leo Radzihovsky, John Toner
A Discotic Disguised As A Smectic: A Hybrid Columnar Bragg Glass, Karl Saunders, Leo Radzihovsky, John Toner
Physics
We show that discotics, lying deep in the columnar phase, can exhibit an x-ray scattering pattern which mimics that of a somewhat unusual smectic liquid crystal. This exotic, new glassy phase of columnar liquid crystals, which we call a “hybrid columnar Bragg glass,” can be achieved by confining a columnar liquid crystal in an anisotropic random environment of, e.g., strained aerogel. Long-ranged orientational order in this phase makes single-domain x-ray scattering possible, from which a wealth of information could be extracted. We give detailed quantitative predictions for the scattering pattern in addition to exponents characterizing anomalous elasticity of the system.
Two-Dimensional Pendulum Experiments Using A Spark Generator, Rand S. Worland, Matthew J. Moelter
Two-Dimensional Pendulum Experiments Using A Spark Generator, Rand S. Worland, Matthew J. Moelter
Physics
Student understanding of the superposition of perpendicular harmonic oscillators can be enhanced using a spark generator to record position-versus-time data for smallamplitude pendulum motion in two dimensions. Our students have used this arrangement to analyze the motion of a spherical pendulum and a “Y-suspended” (Blackburn) pendulum that has two effective lengths.
Immaccs: An Experimental Multi-Agent C2 System, Jens G. Pohl, Anthony A. Wood, Kym Jason Pohl
Immaccs: An Experimental Multi-Agent C2 System, Jens G. Pohl, Anthony A. Wood, Kym Jason Pohl
Collaborative Agent Design (CAD) Research Center
The Integrated Marine Multi-Agent Command and Control System (IMMACCS) is a multi-agent, distributed software system, designed to provide a Common Tactical Picture (CTP) with integrated and meaningful decision-support facilities to authorized operators at any access node. IMMACCS has been implemented as a three-tier architecture that distinguishes between information, logic and presentation. It utilizes an object-serving communication facility with subscription and multi-casting capabilities that is based on the Common Object Request Broker Architecture (CORBA). With an emphasis on application, IMMACCS was designed and implemented in concert with its military users as an integral component of experiments conceived by the Marine Corps …
Semi-Regular Mesh Extraction From Volumes, Z. J. Wood, M. Desbrun, P. Schroder, D. Breen
Semi-Regular Mesh Extraction From Volumes, Z. J. Wood, M. Desbrun, P. Schroder, D. Breen
Computer Science and Software Engineering
We present a novel method to extract iso-surfaces from distance volumes. It generates high quality semi-regular multiresolution meshes of arbitrary topology. Our technique proceeds in two stages. First, a very coarse mesh with guaranteed topology is extracted. Subsequently an iterative multi-scale force-based solver refines the initial mesh into a semi-regular mesh with geometrically adaptive sampling rate and good aspect ratio triangles. The coarse mesh extraction is performed using a new approach we call surface wavefront propagation. A set of discrete iso-distance ribbons are rapidly built and connected while respecting the topology of the iso-surface implied by the data. Subsequent multi-scale …
Robotic System Sensitivity To Neural Network Learning Rate: Theory, Simulation, And Experiments, Christopher M. Clark, James K. Mills
Robotic System Sensitivity To Neural Network Learning Rate: Theory, Simulation, And Experiments, Christopher M. Clark, James K. Mills
Computer Science and Software Engineering
Selection of neural network learning rates to obtain satisfactory performance from neural network controllers is a challenging problem. To assist in the selection of learning rates, this paper investigates robotic system sensitivity to neural network (NN) learning rate. The work reported here consists of experimental and simulation results. A neural network controller module, developed for the purpose of experimental evaluation of neural network controller performance of a CRS Robotics Corporation A460 robot, allows testing of NN controllers using real-time iterative learning. The A460 is equipped with a joint position proportional, integral, and derivative (PID) controller. The neural network module supplies …
Using A Mensuration Approach With Fia Vegetation Plot Data To Assess The Accuracy Of Tree Size And Crown Closure Classes In A Vegetation Map Of Northeastern California, Samantha J. Gill, Jeff Milliken, Debby Beardsley, Ralph Warbington
Using A Mensuration Approach With Fia Vegetation Plot Data To Assess The Accuracy Of Tree Size And Crown Closure Classes In A Vegetation Map Of Northeastern California, Samantha J. Gill, Jeff Milliken, Debby Beardsley, Ralph Warbington
Natural Resources Management and Environmental Sciences
The accuracy of the Lassen-Modoc vegetation map was assessed using data from a grid of permanent Forest In-ventory and Analysis (FIA) plots in conjunction with a fuzzy logic approach. This paper presents the results for the Modoc National Forest. The main foci of this paper are the methods and results for assessing the accuracy of tree size and crown closure classes using a mensurational approach based on calculations made from the plot data. This approach proved very useful in conjunction with fuzzy accuracy methods. Higher error rates reported for crown closure classes may be due to a variety of factors …
Singularly Perturbed Control Systems Using Non-Commutative Computer Algebra, J. W. Helton, F. Dell Kronewitter, W. M. Mceneaney, Mark Stankus
Singularly Perturbed Control Systems Using Non-Commutative Computer Algebra, J. W. Helton, F. Dell Kronewitter, W. M. Mceneaney, Mark Stankus
Mathematics
Most algebraic calculations which one sees in linear systems theory, for example in IEEE TAC, involve block matrices and so are highly non-commutative. Thus conventional commutative computer algebra packages, as in Mathematica and Maple, do not address them. Here we investigate the usefulness of non-commutative computer algebra in a particular area of control theory − singularly perturbed dynamic systems − where working with the non-commutative polynomials involved is especially tedious. Our conclusion is that they have considerable potential for helping practitioners with such computations. Commutative Gröbner basis algorithms are powerful and make up the engines in symbolic algebra packages' …
Occurrence And Distribution Of Diverse Populations Of Magnetic Protists In A Chemically Stratified Coastal Salt Pond, Dennis A. Bazylinski, David R. Schlezinger, Brian H. Howes, Richard B. Frankel, Slava S. Epstein
Occurrence And Distribution Of Diverse Populations Of Magnetic Protists In A Chemically Stratified Coastal Salt Pond, Dennis A. Bazylinski, David R. Schlezinger, Brian H. Howes, Richard B. Frankel, Slava S. Epstein
Physics
Chemical stratification occurs in the water columns and sediments of many aquatic habitats resulting in vertical chemical and redox gradients. Various types of microorganisms are often associated with specific depths and chemical parameters in these situations. For example, magnetite-producing magnetotactic bacteria are known to form horizontal “plates” of cells at the oxic/anoxic transition zone (OATZ) of such environments. Here, we report the presence of populations of diverse magnetic protists in a seasonally chemically stratified, coastal salt pond. The protistan types included several biflagellates, a dinoflagellate, and a ciliate that were each associated with specific depths and thus, specific chemical, microbiological …
Adapting To The Information Age, Jens G. Pohl
Adapting To The Information Age, Jens G. Pohl
Collaborative Agent Design (CAD) Research Center
This paper draws attention to the profound changes that human civilization is experiencing as it moves from an industrial environment into an information environment, in which unprecedented emphasis is placed on the knowledge and capabilities of the individual. A clear distinction is drawn between data and information in relationship to computer-based facilities, and the transition of data-processing to the higher levels of information and knowledge representation in quasi intelligent decision-support systems. It is argued that the cultivation of its human capital becomes a foundational requirement for the success of a knowledge-based organization. In such an organization traditional practices of hierarchical, …
An Inference Engine-Based Subscription Service, Kym J. Pohl, Jens G. Pohl
An Inference Engine-Based Subscription Service, Kym J. Pohl, Jens G. Pohl
Collaborative Agent Design (CAD) Research Center
A Distributed Network Architecture (DNA) forms the basis of many decision-support systems available today. Such architecture excels at providing an application environment rich in transparency, performance, and expandability (Gray and Lievano 1997). However, efforts at the Collaborative Agent Design (CAD) Research Center in San Luis Obispo, California have found that for this architecture to be successfully applied to agent-based, decision-support systems two additional ingredients must be present, namely a query service and a subscription service. These two mechanisms support the extensive collaboration inherent in agent-based, decision-support systems. Although primarily utilized as a means of agent-to-agent interaction these two services can …
Modelling The Dynamics Of Abyssal Equator-Crossing Currents, P. F. Choboter, G. E. Swaters
Modelling The Dynamics Of Abyssal Equator-Crossing Currents, P. F. Choboter, G. E. Swaters
Mathematics
No abstract provided.
Peak Flow Responses To Forest Practices In The Western Cascades Of Oregon, Usa, R. L. Beschta, M. R. Pyles, A. E. Skaugset, C. G. Surfleet
Peak Flow Responses To Forest Practices In The Western Cascades Of Oregon, Usa, R. L. Beschta, M. R. Pyles, A. E. Skaugset, C. G. Surfleet
Natural Resources Management and Environmental Sciences
The effects of clearcut silviculture (road building, clearfelling, cable logging, and site preparation) were evaluated using long-term peakflow records for three small watersheds (60–101 ha) and six large basins (62–640 km2) in the western Cascades of Oregon, USA. After a calibration period, two of the small watersheds were treated while the third remained untreated (control). Analysis indicated that peakflow increases following treatments were dependent upon peakflow magnitude. Peakflow increases averaged approximately 13–16% after treatment for 1-yr recurrence interval events, and 6–9% for 5-yr recurrence interval events. For the six large basins, multiple linear regression analyses of peakflows relative …
Restricted Words By Adjacencies, Don Rawlings
Restricted Words By Adjacencies, Don Rawlings
Mathematics
A recurrence, a determinant formula, and generating functions are presented for enumerating words with restricted letters by adjacencies. The main theorem leads to refinements (with up to two additional parameters) of known results on compositions, polyominoes, and permutations. Among the examples considered are (1) the introduction of the ascent variation on compositions, (2) the enumeration of directed vertically convex polyominoes by upper descents, area, perimeter, relative height, and column number, (3) a tri-variate extension of MacMahon's determinant formula for permutations with prescribed descent set, and (4) a combinatorial setting for an entire sequence of bibasic Bessel functions.
The Poisson Variation Of Montmort's Matching Problem, Don Rawlings
The Poisson Variation Of Montmort's Matching Problem, Don Rawlings
Mathematics
No abstract provided.
Hybrid Probabilistic Programs, Alex Dekhtyar, V. S. Subrahmanian
Hybrid Probabilistic Programs, Alex Dekhtyar, V. S. Subrahmanian
Computer Science and Software Engineering
The precise probability of a compound event (e.g. e1 V e2,e1 Ʌ e2) depends upon the known relationships (e.g. independence, mutual exclusion, ignorance of any relationship, etc.) between the primitive events that constitute the compound event. To date, most research on probabilistic logic programming has assumed that we are ignorant of the relationship between primitive events. Likewise, most research in AI (e.g. Bayesian approaches) has assumed that primitive events are independent. In this paper, we propose a hybrid probabilistic logic programming language in which the user can explicitly associate, with any given probabilistic strategy, a conjunction and disjunction operator, and …
Proceedings Of The 2000 Onr Decision-Support Workshop Series: The Human-Computer Partnership In Decision-Support, Collaborative Agent Design Research Center
Proceedings Of The 2000 Onr Decision-Support Workshop Series: The Human-Computer Partnership In Decision-Support, Collaborative Agent Design Research Center
Collaborative Agent Design (CAD) Research Center
The Decision Support Workshop of May 2-4, 2000 held in San Luis Obispo, Cal., was the second in a series that was started one year earlier as a joint project of the Office of Naval Research and the Collaborative Agent Design Research Center of Cal Poly.
The goal of this series of Workshops is to provide a forum where connections can be established on one hand between developers and proponents of decision support tools, with potential users such as managers of large, complex organizations/systems on the other. Clearly, the military belong to this class of users and it is therefore …
Doomsday Fears At Rhic, Thomas D. Gutierrez
Doomsday Fears At Rhic, Thomas D. Gutierrez
Physics
This year, the Relativistic Heavy Ion Collider (RHIC) is poised to begin a program of cutting-edge nuclear science. Recently, alarmist journalism unnecessarily raised public fears about implausible doomsday scenarios associated with the machine.
Monitoring Of Distributed Processes With Mobile Agents, Ryan P. Kennedy, Franz J. Kurfess
Monitoring Of Distributed Processes With Mobile Agents, Ryan P. Kennedy, Franz J. Kurfess
Computer Science and Software Engineering
The proliferation of networked and distributed systems presents a need for more tool development with regard to the monitoring and maintenance of distributed processes. The goal of this paper is to present a mechanism used to collect detailed process information from various remote Unix hosts on a network. The interface to this mechanism, a GUI applet, is accessible through a Java enabled browser such as Netscape Navigator. It presents the user with a menu of choices such as which host to view, and what process information to retrieve (I/O-bound processes, numbers of processes, individual/total process usage, etc.). The requested information …
Magnetite Biomineralization And Ancient Life On Mars, Richard B. Frankel, Peter R. Buseck
Magnetite Biomineralization And Ancient Life On Mars, Richard B. Frankel, Peter R. Buseck
Physics
Certain chemical and mineral features of the Martian meteorite ALH84001 were reported in 1996 to be probable evidence of ancient life on Mars. In spite of new observations and interpretations, the question of ancient life on Mars remains unresolved. Putative biogenic, nanometer magnetite has now become a leading focus in the debate.
Topologically Ordered Phases Of Smectics Confined In Anisotropic Random Media: Smectic Bragg Glasses, Karl Saunders, Brad Jacobsen, Leo Radzihovsky, John Toner
Topologically Ordered Phases Of Smectics Confined In Anisotropic Random Media: Smectic Bragg Glasses, Karl Saunders, Brad Jacobsen, Leo Radzihovsky, John Toner
Physics
We report the existence of two new topologically ordered glass phases of smectics in strained aerogel. In contrast to the case of unstrained aerogel, we find compelling theoretical arguments that a smectic in uniaxially stretched aerogel exhibits, for homeotropic nematic-aerogel alignment, a `smectic Bragg glass' in the universality class of the `XY Bragg glass'. On the other hand, a uniaxial compression, with homeotropic alignment, leads to an entirely novel type of anisotropic smectic elastic glass phase that we call the `m = 1 Bragg glass'. This latter phase exhibits anomalous elasticity, characterized by exponents that we calculate to high precision. …
Modeling Conifer Tree Crown Radius And Estimating Canopy Cover, Samantha J. Gill, Gregory S. Biging, Edward C. Murphy
Modeling Conifer Tree Crown Radius And Estimating Canopy Cover, Samantha J. Gill, Gregory S. Biging, Edward C. Murphy
Natural Resources Management and Environmental Sciences
Models of tree crown radius were developed for several conifer species of California. Typical forest inventory variables (DBH, height, height-to-crown base, crown class, basal area per hectare, and trees per hectare) were considered as independent variables in model development. Models were fitted using both ordinary and weighted least squares methods. It was found that for the species studied, an ordinary least squares linear regression with DBH as the only independent variable was appropriate. For some species studied, the addition of other independent variables provided minor improvements over the model with only DBH. These models of crown radius could be summed …
Branch Transition Rate: A New Metric For Improved Branch Classification Analysis, Michael Haungs, Phil Sallee, Matthew Farrens
Branch Transition Rate: A New Metric For Improved Branch Classification Analysis, Michael Haungs, Phil Sallee, Matthew Farrens
Computer Science and Software Engineering
Recent studies have shown significantly improved branch prediction through the use of branch classification. By separating static branches into groups, or classes, with similar dynamic behavior, predictors may be selected that are best suited for each class. Previous methods have classified branches according to taken rate (or bias). We propose a new metric for branch classification: branch transition rate, which is defined as the number of times a branch changes direction between taken and not taken during execution. We show that transition rate is a more appropriate indicator of branch behavior than taken rate for determining predictor performance. When both …
Extensive Forest Leaf Area Survey Aiming At Detection Of Vegetation Change In Subarctic-Boreal Zone, Tomoko Kusakabe, Hayato Tsuzuki, Gary B. Hughes, Tatsuo Sweda
Extensive Forest Leaf Area Survey Aiming At Detection Of Vegetation Change In Subarctic-Boreal Zone, Tomoko Kusakabe, Hayato Tsuzuki, Gary B. Hughes, Tatsuo Sweda
Statistics
The warming resulting from increasing anthropogenic carbon dioxide and other greenhouse gasses is expected to be most prominent in the subarctic-boreal region of the Northern Hemisphere. With the objective of setting up a baseline to monitor possible vegetation change in this region, a continuous vegetation profile extending 600 km from Edmonton, Alberta to Cluff Lake, Saskatchewan, Canada was measured using an airborne infrared laser altimeter mounted on a helicopter. Then the distribution of leaf area index over the same 600 km long transect was estimated from this vegetation profile based on a series of plot surveys on the ground to …
On The Baroclinic Instability Of Axisymmetric Rotating Gravity Currents With Bottom Slope, Paul F. Choboter, Gordone E. Swaters
On The Baroclinic Instability Of Axisymmetric Rotating Gravity Currents With Bottom Slope, Paul F. Choboter, Gordone E. Swaters
Mathematics
The baroclinic stability characteristics of axisymmetric gravity currents in a rotating system with a sloping bottom are determined. Laboratory studies have shown that a relatively dense fluid released under an ambient fluid in a rotating system will quickly respond to Coriolis effects and settle to a state of geostrophic balance. Here we employ a subinertial two-layer model derived from the shallow-water equations to study the stability characteristics of such a current after the stage at which geostrophy is attained. In the model, the dynamics of the lower layer are geostrophic to leading order, but not quasi-geostrophic, since the height deflections …
Nonstandard Analysis In Topology: Nonstandard And Standard Compactifications, S. Salbany, Todor D. Todorov
Nonstandard Analysis In Topology: Nonstandard And Standard Compactifications, S. Salbany, Todor D. Todorov
Mathematics
Let (X, T) be a topological space, and ∗X a non–standard extension of X. There is a natural “standard” topology ST on ∗X generated by ∗G,where G ∈ T . The topological space (∗X,ST) will be used to study, in a systematic way, compactifications of (X, T).