Physical Sciences and Mathematics Commons^™

The Motion Of A Thin Liquid Film Driven By Surfactant And Gravity, Michael Shearer, Rachel Levy

All HMC Faculty Publications and Research

We investigate wave solutions of a lubrication model for surfactant-driven flow of a thin liquid film down an inclined plane. We model the flow in one space dimension with a system of nonlinear PDEs of mixed hyperbolic-parabolic type in which the effects of capillarity and surface diffusion are neglected. Numerical solutions reveal distinct patterns of waves that are described analytically by combinations of traveling waves, some with jumps in height and surfactant concentration gradient. The various waves and combinations are strikingly different from what is observed in the case of flow on a horizontal plane. Jump conditions admit new shock …

Communicating Applied Mathematics: Four Examples, Daniel E. Finkel, Christopher Kuster, Matthew Lasater, Rachel Levy, Jill P. Reese, Ilse C. F. Ipsen

All HMC Faculty Publications and Research

Communicating Applied Mathematics is a writing- and speaking-intensive graduate course at North Carolina State University. The purpose of this article is to provide a brief description of the course objectives and the assignments. Parts A–D of of this article represent the class projects and illustrate the outcome of the course:

• The Evolution of an Optimization Test Problem: From Motivation to Implementation, by Daniel E. Finkel and Jill P. Reese

• Finding the Volume of a Powder from a Single Surface Height Measurement, by Christopher Kuster

• Finding Oscillations in Resonant Tunneling Diodes, by Matthew Lasater

• …

Hairy Strings, Vatche Sahakian

All HMC Faculty Publications and Research

Zero modes of the world-sheet spinors of a closed string can source higher order moments of the bulk supergravity fields. In this work, we analyze various configurations of closed strings focusing on the imprints of the quantized spinor vacuum expectation values onto the tails of bulk fields. We identify supersymmetric arrangements for which all multipole charges vanish; while for others, we find that one is left with Neveu-Schwarz–Neveu-Schwarz, and Ramond-Ramond dipole and quadrupole moments. Our analysis is exhaustive with respect to all the bosonic fields of the bulk and to all higher order moments. We comment on the relevance of …

Optimal Therapy Regimens For Treatment-Resistant Mutations Of Hiv, Weiqing Gu, Helen Moore

All HMC Faculty Publications and Research

In this paper, we use control theory to determine optimal treatment regimens for HIV patients, taking into account treatment-resistant mutations of the virus. We perform optimal control analysis on a model developed previously for the dynamics of HIV with strains of various resistance to treatment (Moore and Gu, 2005). This model incorporates three types of resistance to treatments: strains that are not responsive to protease inhibitors, strains not responsive to reverse transcriptase inhibitors, and strains not responsive to either of these treatments. We solve for the optimal treatment regimens analytically and numerically. We find parameter regimes for which optimal dosing …

Tunneling Through Weak Interactions:  Comparison Of Through-Space-, H-Bond-, And Through-Bond-Mediated Tunneling, Westin Kurlancheek '03, Robert J. Cave

All HMC Faculty Publications and Research

Results from ab initio electronic structure theory calculations on model systems allow for the detailed comparison of tunneling through covalently bonded contacts, hydrogen bonds, and van der Waals contacts. Considerable geometrical sensitivity as well as an exponential distance dependence of the tunneling is observed for tunneling through various nonbonded contacts. However, the fundamental result from the present study is that at most a modest difference is observed between tunneling mediated by H-bonds and tunneling mediated by van der Waals contacts at typical distances for each type of interaction. These results are considered in relation to the pathways model of Beratan …

The Maximal Regular Ideal Of Some Commutative Rings, Emad Abu Osba, Melvin Henriksen, Osama Alkam, Frank A. Smith

All HMC Faculty Publications and Research

In 1950 in volume 1 of Proc. Amer. Math. Soc., B. Brown and N. McCoy showed that every (not necessarily commutative) ring R has an ideal M (R) consisting of elements a for which there is an x such that axa=a, and maximal with respect to this property. Considering only the case when R is commutative and has an identity element, it is often not easy to determine when M(R) is not just the zero ideal. We determine when this happens in a number of cases: Namely when at least one of a or 1-a has a von Neumann inverse, …

Residue Class Rings Of Real-Analytic And Entire Functions, Marek Golasiński, Melvin Henriksen

All HMC Faculty Publications and Research

Let A(ℝ) and E(ℝ) denote respectively the ring of analytic and real entire functions in one variable. It is shown that if m is a maximal ideal of A(ℝ), then A(ℝ)/m is isomorphic either to the reals or a real closed field that is an η1-set, while if m is a maximal ideal of E(ℝ), then E(ℝ)/m is isomorphic to one of the latter two fields or to the field of complex numbers. Moreover, we study the residue class rings of prime ideals of these rings and their Krull dimensions. Use is made of a classical characterization of algebraically closed …

Reflections Acting Efficiently On A Building, Michael E. Orrison

All HMC Faculty Publications and Research

We show how Radon transforms may be used to apply efficiently the class sum of reflections in the finite general linear group GLn(Fq) to vectorsin permutation modules arising from the action of GLn(Fq) on the building oftype An−1(Fq).

Flight Ticket Ordering System, Ching-Ting Huang

Theses Digitization Project

The Flight Ticket Ordering System (FTOS) is an online system that allows members to get flight information and purchase tickets through the Internet. The project is designed to be a multi-platform, thus the interface is a normal web browser and it is written in HTML (Hyper Text Markup Language), and JSP (Java Server Page). In this system, we use the MySQL database server to maintain persistent data.

Webisms: (Web-Based Information Security Management System): A Prevention Information Security Tool, Nam Kim

Theses Digitization Project

The impetus for this project came from five years of experience working as a system and network administrator in the California State University, San Bernardino's (CSUSB's) College of Natural Sciences. The college and campus in general are under continual cyber attack, usually by direct-penetration methods and all kinds of viruses, worms, and spywares. This project developed WebISMS as a prevention approach in information security. WebISMS is now deployed in the CSUSB Institute of Applied Supercomputing lab, where it is working efficiently as an information security assessment / audit tool.

Siegel’S Lemma With Additional Conditions, Lenny Fukshansky

CMC Faculty Publications and Research

Let K be a number field, and let W be a subspace of K-N, N >= 1. Let V-1,..., V-M be subspaces of KN of dimension less than dimension of W. We prove the existence of a point of small height in W\boolean OR(M)(i=1) V-i, providing an explicit upper bound on the height of such a point in terms of heights of W and V-1,..., V-M. Our main tool is a counting estimate we prove for the number of points of a subspace of K-N inside of an adelic cube. As corollaries to our main result we derive an explicit …

Integral Points Of Small Height Outside Of A Hypersurface, Lenny Fukshansky

CMC Faculty Publications and Research

Let F be a non-zero polynomial with integer coefficients in N variables of degree M. We prove the existence of an integral point of small height at which F does not vanish. Our basic bound depends on N and M only. We separately investigate the case when F is decomposable into a product of linear forms, and provide a more sophisticated bound. We also relate this problem to a certain extension of Siegel’s Lemma as well as to Faltings’ version of it. Finally we exhibit an application of our results to a discrete version of the Tarski plank problem.

Inter-Annual Sea Level Variability In The Southern Gulf Of Mexico (1966-1976), David Alberto Salas-De-León, Maria Adela Monreal-Gómez, David Salas-Monreal, Mayra Lorena Riveron-Enzastiga, Norma Leticia Sánchez-Santillan

CCPO Publications

Hourly time series at seven locations throughout the southern Gulf of Mexico were used to calculate the trend and the inter-annual sea level. The sea level series from January 1966 to December 1976 were filtered using a Lanczos low pass filter to remove oscillations with periods smaller than one year. The results revealed a sea level increment of about 1.4 mm yr(-1) from 1966 to 1976 in the southern Gulf of Mexico. The monthly sea level variability obtained after the trends were removed, presented a sea level setup during winter and a sea level depression in summer attributed to seasonal …

Semantic Tableaux Program, Sirisha Lakshmi Vadaparty

Theses Digitization Project

This project created a program that takes predicate calculus formulas and creates a visual Semantic Tableaux truth tree, thereby proving or disproving a conclusion. Formal methods used in developing and verifying software and hardware are mathematically based techniques for describing and reasoning about system properties. Such formal methods provide frameworks within which people specify, develop, and verify systems in a systematic, rather than ad hoc, manner. Formal methods include the more specific activities of program specification, program verification and hardware verification.

Solicitation Management System, Yu-Luen Lin

Theses Digitization Project

This project updated the California State University, San Bernardino's Office of Technology Transfer and Commercialization's Solicitation Management System (SMS) software, used to facilitate the processing of grant proposal solicitations. The SMS software update improved the interface so that it is more user-friendly, increased the processing speed, and added additional functions necessary to comply with new requirements. The software was rewritten using the Spring and Hibernate frameworks.

Improvement And Deployment Of The Web-Based Database Management System For Computer Science Graduate Program, Li-Chuan Fang

Theses Digitization Project

In 2005 Mr. Dung Tien Vu completed a master's project for the California State University, San Bernardino Computer Science Department in which he designed a web-based database of department graduate student information. This project was designed to alter the system so that it conforms with current campus regulations, to make some improvements to the system, and to deploy it.

Restaurant Recommendation System (Rrs), Tai-Jung Lin

Theses Digitization Project

Discusses the development of an online restaurant recommendation system that allows users to search for restaurants in the Los Angeles area. The user can retrieve restaurant information including, name, type of restaurant, address, phone number, rating, prices and map. By logging in, users can also give their own recommendations and rate restaurants. The system also provides functions that allow a system a system administrator to manage the contents of the site. The project is based on Java Server Pages (JSP) language, Java Server Programming, which is a server side scripting language. Utilizes MySQL to maintain persistent data and Tomcat as …

Parallel Programming On General Block Min Max Criterion, Chuanche Lee

Theses Digitization Project

The purpose of the thesis is to develop a parallel implementation of the General Block Min Max Criterion (GBMM). This thesis deals with two kinds of parallel overheads: Redundant Calculations Parallel Overhead (RCPO) and Communication Parallel Overhead (CPO).

Game Design And Development, Vani Indrani Surangi

Theses Digitization Project

The project focuses on computer tools suitable for particular game genres and how they are used to develop 3D computer games. As part of learning about the tools, the author developed a 3D computer adventure game called "Adventures of Smiley" using Macromedia Director MX and 3D Studio Max. The game's purpose is to engage children using a friendly interface while they learn about different topics in various subject areas through lessons and puzzles. The research gathered information about the current game industry, technologies and game genres, which can be used as a reference for the beginning level game programmer. The …

Remote: A Complete Tool To Support Software Process Management, Darrion Todd Demelo

Theses Digitization Project

The purpose of the project is to provide the Department of Computer Science at California State University, San Bernardino with a software project management tool that will help companies in their software development. ReMoTe (Recursively Estimating Multi-Threaded Observation Technology Enterprise) will assist software engineering teams with defining their scheduled delivery dates, life-cycle definitions, team hierarchy, and communication. Using the object-oriented approach, ReMoTe can support any software life cycle model. ReMoTe can help manage and control the software process over the Web. It also allows people to manage software artifacts using database systems such as mySQL, Microsoft Access, or Oracle.

From Measure To Integration, Sara Hernandez Mcloughlin

Theses Digitization Project

The thesis studies the notions of outer measure, Lebesgue measurable sets and Lebesgue measure, in detail. After developing Lebesgue integration over the real line, the Riemann integrable functions are classified as those functions whose set of points of discontinuity has measure zero. The convergence theorems are proven and it is shown how these theorems are valid under less stringent assumptions that are required for the Riemann integral. A detailed analysis of abstract measure theory for general measure spaces is given.

Use Of Sediment Rating Curves And Optical Backscatter Data To Characterize Sediment Transport In The Upper Yuba River Watershed, California, 2001–03, Jennifer A. Curtis, Lorraine E. Flint, Charles N. Alpers, Scott A. Wright, Noah P. Snyder

United States Geological Survey: Publications

Sediment transport in the upper Yuba River watershed, California, was evaluated from October 2001 through September 2003. This report presents results of a three-year study by the U.S. Geological Survey, in cooperation with the California Ecosystem Restoration Program of the California Bay–Delta Authority and the California Resources Agency. Streamflow and suspended-sediment concentration (SSC) samples were collected at four gaging stations; however, this report focuses on sediment transport at the Middle Yuba River (11410000) and the South Yuba River (11417500) gaging stations. Seasonal suspended-sediment rating curves were developed using a group-average method and non-linear least-squares regression. Bed-load transport relations were used …

Geochemical Data For Mercury, Methylmercury, And Other Constituents In Sediments From Englebright Lake, California, 2002, Charles N. Alpers, Michael P. Hunerlach, Mark C. Marvin-Dipasquale, Ronald C. Antweiler, Brenda K. Lasorsa, John F. De Wild, Noah P. Snyder

United States Geological Survey: Publications

This report presents geochemical data from two 2002 sampling campaigns conducted in Englebright Lake on the Yuba River in northern California. A deep coring campaign was done in May–June 2002 and a shallow sampling campaign was completed in October 2002. This work assessed the chemical composition of material deposited in the reservoir between 1940, the year Englebright Dam was completed, and 2002 as part of the Upper Yuba River Studies Program, an effort designed to evaluate the feasibility of introducing anadromous fish, including steelhead and spring-run Chinook salmon, upstream from Englebright Dam. Results of analyses of total mercury (HgT) in …

The Sparrow Surface Water-Quality Model: Theory, Application And User Documentation, G. E. Schwarz, A. B. Hoos, R. B. Alexander, R. A. Smith

United States Geological Survey: Publications

SPARROW (SPAtially Referenced Regressions On Watershed attributes) is a watershed modeling technique for relating water-quality measurements made at a network of monitoring stations to attributes of the watersheds containing the stations. The core of the model consists of a nonlinear regression equation describing the non-conservative transport of contaminants from point and diffuse sources on land to rivers and through the stream and river network. The model predicts contaminant flux, concentration, and yield in streams and has been used to evaluate alternative hypotheses about the important contaminant sources and watershed properties that control transport over large spatial scales.

This report provides …

Scientific Reports Of Soviet Whaling Expeditions In The North Pacific, 1955-1978, Yulia V. Ivashchenko, Phillip J. Clapham, Robert L. Brownell Jr.

United States Department of Commerce: Staff Publications

The translated and annotated materials in this volume constitute a collection of 18 formerly secret internal reports written by Soviet scientists working aboard whaling factory ships in the North Pacific. The reports cover the period from 1955 to 1978. During most of this time, the USSR was engaged in a massive campaign of illegal whaling worldwide; these illegal catches continued until introduction of the International Whaling Commission’s International Observer Scheme in 1972. The reports were copied from the archives of the Pacific Research and Fisheries Center (TINRO) in Vladivostok by Alfred A. Berzin, the former director of TINRO’s marine mammal …

Relating Chronic Toxicity Responses To Population-Level Effects: A Comparison Of Population-Level Parameters For Three Salmon Species As A Function Of Low-Level Toxicity, Julann A. Spromberg, James P. Meador

United States Department of Commerce: Staff Publications

Standard laboratory toxicity tests assess the physiological responses of individual organisms to exposure to toxic substances under controlled conditions. Time and space restrictions often prevent the assessment of population-level responses to a toxic substance. Contaminants can affect various biological functions (e.g. growth, fecundity or behavior), which may alter different demographic traits, leading to population-level impacts. In this study,immune suppression, reproductive dysfunction and somatic growth impairment were examined using life history matrix models for coho salmon (Oncorhynchus kisutch), sockeye salmon (Oncorhynchus nerka) and chinook salmon (Oncorhynchus tshawytscha). Our intent was to gauge the relative magnitude …

Molecular Effects Of Nicarbazin On Avian Reproduction, C. A. Yoder, J. K. Graham, L. A. Miller

United States Department of Agriculture Wildlife Services: Staff Publications

Nicarbazin (NCZ) is an anticoccidial drug routinely used in the poultry industry that can negatively affect reproduction by reducing egg production, egg weight, and egg hatchability. The molecular mechanisms by which NCZ affects reproduction are unknown. Lipoprotein lipase, vitellogenin, transglutaminase, and calcium are all involved in egg formation and embryogenesis. Therefore, in vitro assays were used to evaluate 4 potential mechanisms of action of NCZ on egg formation and embryogenesis. First, a lipoprotein lipase assay was conducted to determine if NCZ increases lipoprotein lipase activity. Second, vitellogenin phosphorylation was evaluated to determine if NCZ acts as a vitellogenin phosphatase. Third, …

Effects Of Addition Of A Bird Repellent To Fish Diets On Their Growth And Bioaccumulation, Sheenan Harpaz, Larry Clark

United States Department of Agriculture Wildlife Services: Staff Publications

The effects of adding the nonlethal bird repellent methyl anthranilate (MA), at levels of 100 and 1000 mg/kg, to fish feed on the bioaccumulation and growth of juvenile (10 g) hybrid striped bass (Morone chrysops x M. saxatilis) and juvenile (1g) African cichlid fish Aulonocara jacobfreibergi were investigated under laboratory conditions. The bird repellent did not have any effect on the fish growth or survival over a period of 6 weeks. MA residues at low levels of 11.2 ± 2.6 mg/g were found in lipophili tissues (liver) of MA-fed fish. Control fish, which had no MA added to their diet, …

Determination Of Diphacinone Residues In Hawaiian Invertebrates, Thomas M. Primus, Dennis J. Kohler, John J. Johnston

United States Department of Agriculture Wildlife Services: Staff Publications

A reversed-phase ion-pair liquid chromatogaphic analysis combined with a solid-phase extraction clean-up method is used to assess the quantity of diphacinone residue found in invertebrates. Three invertebrate species are exposed to commercially available diphacinone-fortified bait used for rat control. The invertebrate samples are collected, frozen, and shipped to the laboratory. The samples are homogenized after cryogenic freezing. A portion of the homogenized samples are extracted with acidified chloroform-acetone, followed by cleanup with a silica solid-phase extraction column. Diphacinone is detected by UV absorption at 325 nm after separation by the chromatographic system. The method limit of detection (MLOD) for snail …

Modeling Blackbird Abundance In The Prairie Pothole Region Using A Hierarchical Spatial Model, Greg M. Forcey, George M. Linz, Wayne E. Thogmartin, William J. Bleier

United States Department of Agriculture Wildlife Services: Staff Publications

Blackbirds are ubiquitous members of the avian fauna in the Prairie Pothole Region. However, their abundance combined with their food habits make blackbirds significant agricultural pests on sunflower. Cost estimates for blackbird damage to sunflower in the northern Great Plains range from 4-11 million U.S. dollars per year. Because of their economic impact on agriculture, it is imperative to understand the environmental factors that influence blackbird abundance patterns. This study attempts to quantify the effects of landscape-level land use and climate patterns on blackbird abundance in the Prairie Pothole Region of the United States.