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Articles 1231 - 1260 of 3030
Full-Text Articles in Physical Sciences and Mathematics
Effects Of Eluent Ph And Different Types Of Acidic Modifiers On The Retention And Electrospray Ionization Efficiency Of Basic Analytes In Lc-Esi-Ms., Unita L. Peri-Okonny
Effects Of Eluent Ph And Different Types Of Acidic Modifiers On The Retention And Electrospray Ionization Efficiency Of Basic Analytes In Lc-Esi-Ms., Unita L. Peri-Okonny
Seton Hall University Dissertations and Theses (ETDs)
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The Partition/Adsorption Model For The Description Of The Retention Mechanism In Reversed Phase Liquid Chromatography, Tarun S. Patel
The Partition/Adsorption Model For The Description Of The Retention Mechanism In Reversed Phase Liquid Chromatography, Tarun S. Patel
Seton Hall University Dissertations and Theses (ETDs)
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Search For The Supersymmetric Partner Of The Top Quark In Pp̅ Collisions At √S=1.8 Tev, T. Affolder, Kenneth A. Bloom, Collider Detector At Fermilab Collaboration
Search For The Supersymmetric Partner Of The Top Quark In Pp̅ Collisions At √S=1.8 Tev, T. Affolder, Kenneth A. Bloom, Collider Detector At Fermilab Collaboration
Kenneth Bloom Publications
We report on a search for the supersymmetric partner of the top quark (top squark) produced in tt̅ events using 110 pb-1 of pp̅ collisions at √s =1.8 TeV recorded with the Collider Detector at Fermilab. In the case of a light top squark, the decay of the top quark into a top squark plus the lightest supersymmetric particle (LSP) could have a significant branching ratio. The observed events are consistent with standard model tt̅ production and decay. Hence, we set limits on the branching ratio of the top quark decaying into a top squark plus LSP, excluding branching …
Comparative Composition Of Undisturbed Forest And The 1974 Tornado Track Forest Recovery On Monte Sano, April E. Hennebeck
Comparative Composition Of Undisturbed Forest And The 1974 Tornado Track Forest Recovery On Monte Sano, April E. Hennebeck
Honors Capstone Projects and Theses
No abstract provided.
Seagrass And Caulerpa Monitoring In Hillsborough Bay Twelfth Annual Report, City Of Tampa Department Of Sanitary Sewers
Seagrass And Caulerpa Monitoring In Hillsborough Bay Twelfth Annual Report, City Of Tampa Department Of Sanitary Sewers
Reports
This is the twelfth annual report to FDER to satisfy the requirements set forth in Reclaimed Water and Effluent Limitations and Monitoring Requirements condition #10 of the Howard F. Curren WWTP operation permit FL0020940-001-DW1P.
The City of Tampa, Bay Study Group (BSG), has monitored the effects of sewage pollution abatement in Hillsborough Bay since 1976. During the mid 1980's, water quality improvements and evidence of minor seagrass revegetation in Hillsborough Bay prompted the BSG to initiate a seagrass study to compliment other programs assessing the environmental status of Hillsborough Bay.
Plan Of Study For Annual Water Quality And Biological Indicator Report, City Of Tampa Department Of Sanitary Sewers
Plan Of Study For Annual Water Quality And Biological Indicator Report, City Of Tampa Department Of Sanitary Sewers
Reports
This plan of study is submitted to the Florida Department of Environmental Protection (Department) for approval as specified in Condition #10 of Operation Permit FL0020940-001-DW1P issued by the Department on July 8, 1999.
Intensification In A Risky Environment: The Case Of Improving Private Grazing Land For Beef Production In Utah, Louise D. Sainsbury
Intensification In A Risky Environment: The Case Of Improving Private Grazing Land For Beef Production In Utah, Louise D. Sainsbury
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Utah ranchers commonly face risks to their livelihoods. The objective of this work was to determine if ranchers could make profitable improvements to private land forage given the combined threat of low beef prices, drought, and possible loss of public grazing.
We used linear programming (LINDO) to identify the most profitable solutions for private land investment with an 11-year simulation. Operations were divided into small, medium, and large size classes. Various forage improvements and public permits were options. Two phases of a beef price cycle (peak and trough) and 2 precipitation patterns (wet and drought) were combined as joint favorable …
Experimental Investigation Of Snapover: The Sudden Increase Of Plasma Current Drawn To A Positively Biased Conductor When Surrounded By A Dielectric, Clint D. Thomson
Experimental Investigation Of Snapover: The Sudden Increase Of Plasma Current Drawn To A Positively Biased Conductor When Surrounded By A Dielectric, Clint D. Thomson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Snapover is particularly relevant to Earth-orbiting spacecraft powered by high-voltage solar arrays. During snapover, the current collected by a positively biased conductor that is immersed in a plasma suddenly increases when two conditions are met: i) there is an immediately adjacent insulator; ii) the conductor exceeds a positive threshold voltage with respect to the plasma. The enhanced current develops as a consequence of the insulator, either through secondary electron (SE) emission or by material ionization. Experiments were performed to examine snapover onset potential and current collection dependence on conductor and insulator materials, conductor size and shape, sample history, biasing rate, …
Robust Automatic Multi-Beam Bathymetric Processing, Brian R. Calder, Larry A. Mayer
Robust Automatic Multi-Beam Bathymetric Processing, Brian R. Calder, Larry A. Mayer
Center for Coastal and Ocean Mapping
No abstract provided.
The Modern Mathematics Classroom: A Collection Of Virtual Manipulatives For Teachers And Students, David Stowell
The Modern Mathematics Classroom: A Collection Of Virtual Manipulatives For Teachers And Students, David Stowell
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
An important assumption in the implementation of the National Council of Teachers of Mathematics (NCTM) Standards 2000 is that the mathematics classroom is a place where students are actively involved in the learning process. One way to foster such a learning environment is by using manipulatives. By their nature, manipulatives make the learning of mathematics a discovery-based activity. As computer use increases in the classroom, virtual manipulatives will become more important as instructional tools. Virtual manipulatives offer advantages over their traditional versions. Most important is their dynamic nature. Their dynamic capabilities provide two main benefits. First, the number of potential …
Cluster Computing In The Classroom: Topics, Guidelines, And Experiences, Amy Apon, Rajkumar Buyya, Hai Jin, Jens Mache
Cluster Computing In The Classroom: Topics, Guidelines, And Experiences, Amy Apon, Rajkumar Buyya, Hai Jin, Jens Mache
Publications
With the progress of research on cluster computing, more and more universities have begun to offer various courses covering cluster computing. A wide variety of content can be taught in these courses. Because of this, a difficulty that arises is the selection of appropriate course material. The selection is complicated by the fact that some content in cluster computing is also covered by other courses such as operating systems, networking, or computer architecture. In addition, the background of students enrolled in cluster computing courses varies. These aspects of cluster computing make the development of good course material difficult. Combining our …
A Laboratory-Based Nonlinear Dynamics Course For Science And Engineering Students, Nilgun Sungar, John P. Sharpe, Matthew J. Moelter, Neil Fleishon, Kent Morrison, Jean Mcdill, Rod Schoonover
A Laboratory-Based Nonlinear Dynamics Course For Science And Engineering Students, Nilgun Sungar, John P. Sharpe, Matthew J. Moelter, Neil Fleishon, Kent Morrison, Jean Mcdill, Rod Schoonover
Physics
We describe the implementation of a new laboratory-based interdisciplinary undergraduate course on nonlinear dynamical systems. Geometrical methods and data visualization techniques are especially emphasized. A novel feature of the course is a required laboratory where the students analyze the behavior of a number of dynamical systems. Most of the laboratory experiments can be economically implemented using equipment available in many introductory physics microcomputer-based laboratories.
Radical P-Chains In L3(2)., Donald Dewayne Belcher
Radical P-Chains In L3(2)., Donald Dewayne Belcher
Electronic Theses and Dissertations
The McKay-Alperin-Dade Conjecture, which has not been finally verified, predicts the number of complex irreducible characters in various p-blocks of a finite group G as an alternating sum of the numbers of characters in related p-blocks of certain subgroups of G. The sub-groups involved are the normalizers of representatives of conjugacy classes of radical p-chains of G. For this reason, it is of interest to study radical p-chains. In this thesis, we examine the group L3(2) and determine representatives of the conjugacy classes of radical p-subgroups and radical p-chains for …
Distribution List Maker Program With Inter-User Capabilities Between Universities And Colleges In The Tennessee Board Of Regents School System., Allan Richard Anderson
Distribution List Maker Program With Inter-User Capabilities Between Universities And Colleges In The Tennessee Board Of Regents School System., Allan Richard Anderson
Electronic Theses and Dissertations
E-mail is an important tool for faculty and staff at the university, college, department, and instructor levels. E-mail is a useful medium in the academic setting for corresponding at all levels. Instructors e-mail students about assignments, lectures, and urgent information: for example, postponed classes and changes in the schedule. In addition e-mail is used to let potential students know about job opportunities. Other routine uses for e-mail include group communications within academic committees and groups of students collaborating on projects.
Most users of e-mail who send messages to multiple recipients enter each recipients e-mail address into the TO: field individually …
An All-To-All Multicast Routing Protocol In A Wireless Ad-Hoc Network To Improve Channel Utilization, Zhong Hua Zhou
An All-To-All Multicast Routing Protocol In A Wireless Ad-Hoc Network To Improve Channel Utilization, Zhong Hua Zhou
Theses and Dissertations
Wireless Ad-hoc network has become more and more popular. Several different multicasting schemes for this type of network have been developed. But most of them are targeting a situation where the total number of senders is much less than the total number of receivers. This thesis analyzes different wireless communication patterns in ad hoc network, the trend for wireless communication and presents a new multicast scheme. It targets an ad-hoc network where all mobile hosts act as both senders and receivers. The proposed scheme in this thesis will reduce overheads by combining data packets that are destined for the same …
Trimethylsulfonium Methanesulfonate, Frank R. Fronczek, Rolanda J. Johnson, Robert M. Strongin
Trimethylsulfonium Methanesulfonate, Frank R. Fronczek, Rolanda J. Johnson, Robert M. Strongin
Chemistry Faculty Publications and Presentations
In the title compound, C3H9S+.CH3O3S-, a thermal decomposition product of dimethyl sulfoxide, both cation and anion lie on mirror planes. In the cation, the S atom lies 0.792 (2) Å out of the plane defined by the three C atoms, with S-C distances of 1.781 (2) and 1.786 (3) Å. In the anion, the S-O distances are 1.4556 (14) and 1.4646 (19) Å, and the S-C distance is 1.759 (3) Å.
Explorations In The Classification Of Vertices As Good Or Bad., Eugenie Marie Jackson
Explorations In The Classification Of Vertices As Good Or Bad., Eugenie Marie Jackson
Electronic Theses and Dissertations
For a graph G, a set S is a dominating set if every vertex in V-S has a neighbor in S. A vertex contained in some minimum dominating set is called good; otherwise it is bad. A graph G has g(G) good vertices and b(G) bad vertices. The relationship between the order of G and g(G) assigns the graph to one of four classes.
Our results include a method of classifying caterpillars. Further, we develop realizability conditions for a graph G given a triple of nonnegative integers …
A Geometric Inequality For Convex Polygons, Mostafa Ghandehari
A Geometric Inequality For Convex Polygons, Mostafa Ghandehari
Mathematics Technical Papers
Consider a regular polygon with vertices P1, P2, , Pn. Assume P is an interior point. Let [see pdf for notation] denote the Euclidean distance from P to Pi, i = 1, ...., n. Let A denote the area of the polygon. It is shown that [see pdf for notation] special cases of the above inequality are proved for some nonregular convex polygons. An example is given to show that the above inequality is not true for a general convex polygon.
Casco Bay Watershed Wetlands Characterization, State Planning Office
Casco Bay Watershed Wetlands Characterization, State Planning Office
Maine Collection
Casco Bay Watershed Wetlands Characterization
State of Maine Executive Department - State Planning Office
Augusta, Maine, May 2001
Contents: Abstract / Background / Getting Started / Designing the System / The Characterization / The Prioritization / Results / Cautions / Significance of the Approach / Literature Cited / Figure 1 - Biophysical Regions of Maine / Appendix A: Steering Committee Members / Appendix B: Field Verification Form / Appendix C: Contacts
Historical And Contemporary Distributions Of Aquatic Mollusks In The Upper Conasauga River System Of Georgia And Tennessee, Robert Ryan Evans
Historical And Contemporary Distributions Of Aquatic Mollusks In The Upper Conasauga River System Of Georgia And Tennessee, Robert Ryan Evans
Masters Theses and Doctoral Dissertations
The Conasauga River, an upper Coosa River tributary, was historically one of the most diverse rivers within the Mobile basin drainage for freshwater mollusks. The Conasauga River historically supported 37 species of unionids (Bivalvia: Unionidae), 11 species of prosobranch gastropods (Mollusca: Gastropoda), and 3 species of sphaerid (Bivalvia: Sphaeridae) clams. I collected records from several museums ranging from 1914 to 1990 to chronicle the historical diversity of the Conasauga River system, and conducted a contemporary survey to compare changes in species distributions and richness over the twentieth century. During this study, a total of203 collections were made in the mainstem …
Groundwater Study Of The Piawaning Townsite, Russell John Speed, Ali S. Mahtab
Groundwater Study Of The Piawaning Townsite, Russell John Speed, Ali S. Mahtab
Resource management technical reports
A groundwater study was carried out in and around the townsite of Piawaning. It aimed to accelerate the implementation of effective salinity management options. The study consisted of a drilling investigation, expansion of a piezometer network, a pumping test and a flood risk analysis.
Effects Of High Ammonium/Nitrate Ratios On Nitrification And Growth Of Wheat In Hydroponics, Dawn J. Muhlestein
Effects Of High Ammonium/Nitrate Ratios On Nitrification And Growth Of Wheat In Hydroponics, Dawn J. Muhlestein
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Nitrogen is the only plant nutrient taken up as both a cation (NH4+) and anion (NO3-). Nitrate is considered the "safe" form of N and NH/ is generally thought to be toxic, especially at high levels. High NH4+/NO3- ratios are thought to be toxic because they result in a rhizosphere pH low enough to damage root membranes, induced cation deficiencies, and build-up of NH3 caused by delayed NH/ assimilation. These factors can be minimized in hydroponic culture. The objective of these studies was to quantify the effects of high …
Structural And Geochemical Analyses Of Disseminated-Gold Deposits, Bald Mountain-Alligator Ridge District, Nevada: Insights Into Fault-Zone Architecture And Its Effect On Mineralization, K. Jill Hammond
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Structural and geochemical analyses of the Top and Casino deposits, Bald Mountain-Alligator Ridge district, Nevada, were conducted to determine how structures affected gold deposition in Carlin-type deposit s. We also examined how permeability changed over time in a fault that cuts siltstone-dominated sedimentary rocks. The association of gold and related arsenic with faults at the margins of a Jurassic pluton and sedimentary rocks suggests that ore fluids migrated along faults and fracture s. Permeability of the faults changed over time within the Casino deposit, where the ore-controlling fault was a distributed conduit in the early stages of mineralization but a …
Effectiveness Of Earthen Escape Ramps In Reducing Big Game Mortality In Utah, Mary L. Hammer
Effectiveness Of Earthen Escape Ramps In Reducing Big Game Mortality In Utah, Mary L. Hammer
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
One-way escape gates and earthen escape ramps are structures used to enable deer to exit the highway right-of-way along fenced roads. I compared the use of one-way escape gates and earthen escape ramps by mule deer on two highways in Utah to determine if deer exhibited a preference for either structure. Results showed that earthen escape ramps were used by mule deer 8-11 times more frequently than one-way gates. Highway mortality data suggest that the installation of the escape ramps likely reduced mortality of mule deer in both study locations, because we could not attribute reductions in mortality to decreased …
Structural Analysis And A Kink Band Model For The Formation Of The Gemini Fault Zone, An Exhumed Left-Lateral Strike Slip Fault Zone In The Central Sierra Nevada, California, Matthew A. Pachell
Structural Analysis And A Kink Band Model For The Formation Of The Gemini Fault Zone, An Exhumed Left-Lateral Strike Slip Fault Zone In The Central Sierra Nevada, California, Matthew A. Pachell
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The structure and regional tectonic setting of an exhumed, 9.3-km long, left-lateral strike-slip fault zone eludicates processes of growth, linkage, and termination for strike-slip fault zones in granitic rocks. The Gemini fault zone is composed of three steeply dipping, southwest-striking, noncoplanar segments that nucleated and grew along preexisting joints. The fault zone has a maximum slip of 131 m and is an example of a segmented, hard-linked fault zone in which geometrical complexities of the faults and compositional variations of protolith and host rock resulted in nonuniform slip orientations, complex interactions at fault segments, and an asymmetric slip-distance profile. Regional …
Generalized Minimum Penalized Hellinger Distance Estimation And Generalized Penalized Hellinger Deviance Testing For Generalized Linear Models: The Discrete Case, Huey Yan
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
In this dissertation, robust and efficient alternatives to quasi-likelihood estimation and likelihood ratio tests are developed for discrete generalized linear models. The estimation method considered is a penalized minimum Hellinger distance procedure that generalizes a procedure developed by Harris and Basu for estimating parameters of a single discrete probability distribution from a random sample. A bootstrap algorithm is proposed to select the weight of the penalty term. Simulations are carried out to compare the new estimators with quasi-likelihood estimation. The robustness of the estimation procedure is demonstrated by simulation work and by Hapel's α-influence curve. Penalized minimum Hellinger deviance tests …
Incorporating Technology In Mathematics Education: A Suite Of E-Activities For The Modem Mathematics Classroom, Jennifer E. Youngberg
Incorporating Technology In Mathematics Education: A Suite Of E-Activities For The Modem Mathematics Classroom, Jennifer E. Youngberg
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
National studies indicate major deficiencies in students' understanding of mathematics. Research suggests that students tend to view mathematics as a set of computational rules rather than a process of discovery and a tool for problem-solving. Most students fail to grasp the concepts behind the computations.
Technology provides a partial solution to this problem. Over the past decade, computers have emerged as a powerful tool in education. Computers place the control of action in the learning process with the student. They allow students to experiment with, explore, and discover mathematics at their own pace. With computers, students can consider more examples …
Park And Ride Feasibility Analysis For The Evansville, Indiana, Metropolitan Area, Brian Howard
Park And Ride Feasibility Analysis For The Evansville, Indiana, Metropolitan Area, Brian Howard
Masters Theses & Specialist Projects
Congested roadways and declining air quality standards are major concerns for many communities faced with the challenges of suburban growth and city decay. How each community chooses to fight the problems created by urban sprawl depends greatly on individualized characteristics of the community. Analyzing and understanding unique values of each community provides a sound foundation for measures designed to promote sustainable growth initiatives. The Evansville, Indiana, region is experiencing many of the growing pains associated with increased residential, commercial, and industrial development. Many roadways are currently strained near capacity, and traffic problems are anticipated to increase over the next 20 …
Elgenvalues Of Fibonacci-Like Sequences, Elyssa Hurst
Elgenvalues Of Fibonacci-Like Sequences, Elyssa Hurst
Masters Theses & Specialist Projects
The familiar Fibonacci sequence 1,1,2,3,5,8,13,... can be described by the recurrence relation x(0) = 1, x(1) = 1, x(n) = x(n-1) + x(n-2). For this relation, as n → oo, x(n+1) → 1 +√5 x(n) 2 ' which is the familiar golden ratio. This value is also the dominant eigenvalue of the above recurrence relation. In this series, we consider the dominant eigenvalue of some Fibonacci-like sequence of the form x(n) = ∑n-1/k+1 ak Zk (n-k) where the Zk's are independent random variables with Zk = {+1 with probability p - 1 with probability q, with p + q = …
Power Series Solutions To Ordinary Differential Equations, John Lagrange
Power Series Solutions To Ordinary Differential Equations, John Lagrange
Masters Theses & Specialist Projects
In this thesis, the reader will be made aware of methods for finding power series solutions to ordinary differential equations. In the case that a solution to a differential equation may not be expressed in terms of elementary functions, it is practical to obtain a solution in the form of an infinite series, since many differential equations which yield such a solution model an actual physical situation. In this thesis, we introduce conditions that guarantee existence and uniqueness of analytic solutions, both in the linear and nonlinear case. Several methods for obtaining analytic solutions are introduced as well. For the …