Digital Commons Network^™

A Survey Of Worm Detection And Containment, Pele Li, M. Salour, Xiao Su

Faculty Publications

Self-duplicating, self-propagating malicious codes known as computer worms spread themselves without any human interaction and launch the most destructive attacks against computer networks. At the same time, being fully automated makes their behavior repetitious and predictable. This article presents a survey and comparison of Internet worm detection and containment schemes. We first identify worm characteristics through their behavior, and then classify worm detection algorithms based on the parameters used in the algorithms. Furthermore, we analyze and compare different detection algorithms with reference to the worm characteristics by identifying the type of worms that can and cannot be detected by these …

Assessing The Professional Development Needs Of Public Health Educators In Light Of Changing Competencies, A. R. Demers, Edward M. Mamary

Faculty Publications

Introduction Because of the need for a well-trained public health workforce, professional competencies have been recently revised by the Institute of Medicine and the National Health Educator Competencies Update Project. This study compared the self-identified training needs of public health educators with the updated competencies and assessed employer support for continuing education. Methods A convenience sample of public health educators was recruited from an e-mail list of San Jose State University master of public health alumni. Respondents completed a Web-based survey that elicited information on emerging trends in public health education, training needs, and employer support for continuing education. Results …

School Libraries Serving Rural Communities In China: The Evergreen Model, Geoffrey Liu

Faculty Publications

This article presents a case study of Evergreen school libraries in the northwestern region of China, with a focus on their innovative approaches to community services and strategies of reaching out to local town residents and villagers. The data gathered for the case study included patron/school librarian interviews, observation of brainstorming by school librarians and principals, and analysis of library use data gathered from project schools. In view of known issues identified from existing literature, this study attempts to identify factors that potentially contribute to a school library's success or failure in serving its local community.

School Library Media Preparation Program Review: Perspectives Of Two Stakeholder Groups, Donna M. Shannon

Faculty Publications

No abstract provided.

Credibility On The Internet: Shifting From Authority To Reliability, R. David Lankes

Faculty Publications

Purpose – This paper seeks to understand how users determine credibility in the internet environment from a conceptual level and the implications of these new methods of credibility determination on internet tools (primarily software) and services.

Design/methodology/approach – The author first examines the underlying reasons for increased dependence on the internet for information, using electronic commerce as a starting point. The central concept of “information self-sufficiency” is introduced and then examined through the lens of the internet and conversation theory.

Findings – The author finds that users are shifting from more traditional “authority” methods of credibility determination, where users cede …

Trouble Counting Votes - Comparing Voting Mechanisms In The United States And Selected Other Countries, Frank Emmert, Christopher Page, Antony Page

Faculty Publications

No abstract provided.

Elastic Wave Field Computation In Multilayered Nonplanar Solid Structures: A Mesh-Free Semianalytical Approach, Sourav Banerjee, Tribikram Kundu

Faculty Publications

Multilayered solid structures made of isotropic, transversely isotropic, or general anisotropic materials are frequently used in aerospace, mechanical, and civil structures. Ultrasonic fields developed in such structures by finite size transducers simulating actual experiments in laboratories or in the field have not been rigorously studied. Several attempts to compute the ultrasonic field inside solid media have been made based on approximate paraxial methods like the classical ray tracing and multi-Gaussian beam models. These approximate methods have several limitations. A new semianalytical method is adopted in this article to model elastic wave field in multilayered solid structures with planar or nonplanar …

Retail Investor Remedies Under Rule 10b-5, O'Hare Jennifer

Faculty Publications

This paper assesses the private remedies available under Rule 10b-5 to retail investors who have been defrauded by false corporate disclosures. After comparing the treatment received by retail investors to the treatment received by institutional investors, I identify several areas in which the federal securities laws disfavor retail investors who have been defrauded by false corporate disclosures, including the creation of a two-tiered system of investor remedies for securities fraud. Institutional investors are permitted to pick and choose which law and forum offers them the most attractive chance for recovery, but retail investors typically do not have this opportunity. They …

The Business Value Of Social Network Technologies: A Framework For Identifying Opportunities For Business Value And An Emerging Research Program, Degan Kettles, Julie Smith David

Faculty Publications

Although social network technologies have been the focus of many articles in the popular and business press, businesses remain unclear about their value. We use theory and data gathered from IT leaders to develop an initial model assessing the value of social network technologies in the business environment. Insights are given into when different features should be used to enhance existing business processes and to provide business value.

Proposing The Hedonic Affect Model (Ham) To Explain How Stimuli And Performance Expectations Predict Affect In Individual And Group Hedonic Systems Use, Paul Benjamin Lowry, Jeffrey L. Jenkins, James Gaskin, Bryan Hammer, Nathan W. Twyman, Martin Hassell

Faculty Publications

Hedonic systems represent a multibillion-dollar industry and play an important role in how people recreate, socialize, and even conduct business. A key goal of hedonic system design is to promote positive affect—a variable known to influence cognitive beliefs, trust, disclosure, adoption, and purchase intentions. Yet, little research has identified or explained how stimuli from design features lead to positive affect in hedonic systems. This article introduces a new theoretical model, the Hedonic Affect Model (HAM), which is a comprehensive and generalizable model explaining the causes of positive and negative affect in a hedonic software context. HAM outlines three stages that …

Impact On Oregon's Budget Of Introducing Same-Sex Domestic Partnerships, M.V. Lee Badgett, R. Bradley Sears, Elizabeth Kukura, Holning S. Lau, The Williams Institute

Faculty Publications

No abstract provided.

Sexual Orientation & Gender Identity: American Law In Light Of East Asian Developments, Holning S. Lau

Faculty Publications

No abstract provided.

Human Rights And Globalization: Putting The Race To The Top In Perspective, Holning S. Lau

Faculty Publications

No abstract provided.

Reduced Order Modeling Of Time-Dependent Reflectance Profiles From Purely Scattering Media, R. Scott Larson, Matthew R. Jones

Faculty Publications

Due to the widespread existence and importance of foam, inverse techniques for characterizing industrial foams are of interest. An essential element in an inverse method used to characterize a foam layer is a model of the time-dependent reflectance of a laser pulse. Monte Carlo methods may be used to accurately model reflectance, but these methods are computationally expensive. Computationally efficient methods based on the diffusion approximation have been developed, but this approach is not sufficiently accurate in many cases of interest. Therefore, a computationally efficient and robust method is desirable. This paper presents a computationally efficient method for modeling the …

Effect Of Micronutrient Fortification On Nutritional And Other Properties Of Nixtamal Tortillas, K. E. Burton, Frost M. Steele, Laura K. Jefferies, Oscar A. Pike, Michael L. Dunn

Faculty Publications

Nixtamalization is the process of steeping dried corn in hot water with calcium hydroxide (lime) with subsequent removal of all or most of the pericarp through washing. The resulting product is called nixtamal. Approximately 60% of corn tortillas in Mexico are produced from nixtamal, with the remainder prepared from nixtamalized corn flour. Nixtamal was fortified with micronutrient premix containing iron, zinc, folic acid, niacin, riboflavin, and thiamin. Premix composition followed a proposed Mexican regulation for corn flour fortification, adjusted for moisture. Effects of premix on masa adhesiveness, hardness, and pH, as well as tortilla sensory properties, stretchability, rollability, and color …

State Administration Vs. Self-Government In The Slovak And Czech Republics, Phillip J. Bryson

Faculty Publications

In the transition experience, the Czech and Slovak Republics have made some effort to achieve fiscal decentralization. From independence to EU accession, the devolution of power designed to strengthen the autonomy of local governments according to the principles of subsidiarity have also included a reform of public administration. The nature of reform efforts and their implications for the fiscal decentralization are analyzed. The failure to achieve a robust autonomy for subnational governments is due to the ongoing adherence to the notion of the "state administration" as opposed to self-government in both republics.

Model-Centered Instruction, The Design, And The Designer, Andrew S. Gibbons Iii

Faculty Publications

A model of instruction described by Wenger (1987) identifies three elements that are active during instruction: the mental model the instructor wishes to share with the learner, the external experience used to communicate the mental model, and the evolving mental model of the learner. Gibbons (2003a), writing in response to Seel (2003), noted this three-part description as a bridge concept relating learning and instruction. This view has important practical implications for designers of instruction. For example, Gibbons and Rogers (in press) propose that there exists a natural layered architecture within instructional designs that corresponds with instructional functions. Among these layers …

Time Reversal, Brian E. Anderson, Michele Griffa, Paul A. Johnson, Carene Larmat, Timothy J. Ulrich

Faculty Publications

This article provides an historical overview of Time Reversal (TR), introduces its basic physics, addresses advantages and limitations, and describes some applications of this very active research area of acoustics. In the Geophysics Group at the Los Alamos National Laboratory, we conduct studies of TR of elastic waves in solids. Our work includes application of TR to nondestructive evaluation of materials, as well as to earthquake source characterization, and ground-based nuclear explosion monitoring. We emphasize the term elastic waves here to underscore that we include both compression and shear waves, in contrast to purely acoustic waves that are only compressional.

John Zorn. The Gift; Songs From The Hermetic Theatre (2001). Chimeras; Masada Guitars (2003). Masada Recital; Magick (2004). Rituals (2005). Astronome; Masada Rock; Moonchild, Christian T. Asplund

Faculty Publications

Once the unruly upstart, John Zorn is now a MacArthur fellow, whose formidable catalog divides easily into early, middle, and late periods. The early period dates from the mid-1970s to the mid-1980s, when Zorn pioneered the practice of "comprovisation," a term used to describe "the making of new compositions from recordings of improvised material." Ultimately, Zorn's comprovisation blurs the lines between active listener and composer, since both create new works when they impose structure on found sonic material. His early structuralist-modernist approach to comprovisation produced esoteric, often severely pointillist music, and evolved into the game pieces of the late 1970s …

Digital Germany: Virtual Archives, Powerful Portals, Wise Wikis, Richard Hacken

Faculty Publications

Presented in the Winter 2006-2007 issue of the Global Resources Newsletter, the German-North American Resources Partnership issue. Online portals and digital gateways into focused subject and area studies are both boons and blessings. For German Studies but even more extensively, for all disciplines relevant to the German-North American Resources Partnership this past year has seen explosive growth in the preparation, expansion, proofing, and proclamation of virtual libraries, scholarly digital projects, and multidisciplinary portals. German digital scholarship has reached a maturity that calls for the types of systematic registry and centralized access that are vital to researchers from Aachen to Zzyzx.

Exchange Bias In Bulk Mn Rich Ni-Mn-Sn Heusler Alloys, Mahmud Khan, Igor Dubenko, Shane Stadler, Naushad Ali

Faculty Publications

An experimental study on the exchange bias properties of bulk polycrystalline Ni50 Mn50-x Snx Heusler alloys has been performed. Martensitic transformations have been observed in the alloys for some critical Sn concentrations. The alloys, while in their respective martensitic phases, are found to exhibit exchange bias effect. Shifts in hysteresis loops of up to 225 Oe were observed in the 50 kOe field cooled samples. The observed exchange bias behavior in Ni50 Mn50-x Snx is attributed to the coexistence of antiferromagnetic and ferromagnetic exchange interactions in the system. © 2007 American Institute of Physics.

A Recombinant Herpes Simplex Virus Type 1 Expressing Two Additional Copies Of Gk Is More Pathogenic Than Wild-Type Virus In Two Different Strains Of Mice, Kevin R. Mott, Guey Chuen Perng, Yanira Osorio, Konstantin G. Kousoulas, Homayon Ghiasi

Faculty Publications

The effect of glycoprotein K (gK) overexpression on herpes simplex virus type 1 (HSV-1) infection in two different strains of mice was evaluated using a recombinant HSV-1 virus that expresses two additional copies of the gK gene in place of the latency-associated transcript (LAT). This mutant virus (HSV-gK 3) expressed higher levels of gK than either the wild-type McKrae virus or the parental dLAT2903 virus both in vitro (in cultured cells) and in vivo (in infected mouse corneas and trigeminal ganglia [TG] of BALB/c and C57BL/6 mice). gK transcripts were detected in the TG of both HSV-gK 3-infected mouse strains …

The Herpes Simplex Virus Ul20 Protein Functions In Glycoprotein K (Gk) Intracellular Transport And Virus-Induced Cell Fusion Are Independent Of Ul20 Functions In Cytoplasmic Virion Envelopment, Jeffrey M. Melancon, Preston A. Fulmer, Konstantin G. Kousoulas

Faculty Publications

The HSV-1 UL20 protein (UL20p) and glycoprotein K (gK) are both important determinants of cytoplasmic virion morphogenesis and virus-induced cell fusion. In this manuscript, we examined the effect of UL20 mutations on the coordinate transport and Trans Golgi Network (TGN) localization of UL20p and gK, virus-induced cell fusion and infectious virus production. Deletion of 18 amino acids from the UL20p carboxyl terminus (UL20 mutant 204t) inhibited intracellular transport and cell-surface expression of both gK and UL20, resulting in accumulation of UL20p and gK in the endoplasmic reticulum (ER) in agreement with the inability of 204t to complement UL20-null virus replication …

Temporal And Spatial Variations In Maximum River Discharge From A New Russian Data Set, Alexander I. Shiklomanov, Richard B. Lammers, M. A. Rawlins, L. C. Smith, T. M. Pavelsky

Faculty Publications

Floods cause more damage in Russia than any other natural disaster, and future climate model projections suggest that the frequency and magnitude of extreme hydrological events will increase in Russia with climate change. Here we analyze daily discharge records from a new data set of 139 Russian gauges in the Eurasian Arctic drainage basin with watershed areas from 16.1 to 50,000 km2 for signs of change in maximum river discharge. Several hypotheses about changes in maximum daily discharge and their linking with trends in precipitation over the cold season were tested. For the magnitude of maximum daily discharge we found …

Density Gradient Enrichment Of Escherichia Coli Conditional Msba Mutants, William T. Doerrler

Faculty Publications

Insight into the mechanism of lipid transport to the outer membrane of gram-negative bacteria has been hampered by the lack of an effective genetic screen for defective mutants. This work demonstrates an enrichment of conditional mutants defective in lipopolysaccharide export by Ludox density gradient centrifugation and selection for detergent resistance. New temperature-sensitive mutants with lipid export defects were isolated with single missense mutations in msbA. The results demonstrate the power of this approach for the study of lipid export in Escherichia coli. Copyright © 2007, American Society for Microbiology. All Rights Reserved.

Implications Of The Medicaid Undercount In A High-Penetration Medicaid State, R. Kirby Goidel, Steven Procopio, Douglas Schwalm, Dek Terrell

Faculty Publications

Research Objective. This study investigates the impact of misreporting by Medicaid recipients on estimates of the uninsured in Louisiana, and is based on similar work by Call et al. in Minnesota and Klerman, Ringel, and Roth in California. With its unique charity hospital system, culture, and high poverty, Louisiana provides an interesting and unique context for examining Medicaid underreporting. Study Design. Results are based on a random sample of 2,985 Medicaid households. Respondents received a standard questionnaire to identify health insurance status, and individual records were matched to Medicaid enrollment data to identify misreporting. Data Sources. Data were collected by …

Evalution Of The Efficacy Of The Photosystem Ii Inhibitor Dcmu In Periphyton And Its Effects On Nontarget Microorganisms And Extracellular Enzymatic Reactions, Steven N. Francoeur, Audrey C. Johnson, Kevin A. Kuehn, Robert K. Neely

Faculty Publications

We examined the efficacy of the photosystem II inhibitor 3-(3,4-diclorophenyl)-1,1-dimethyl urea (DCMU) for inhibition of algal photosynthesis in periphyton associated with submerged decomposing litter of Typha angustifolia. We also investigated the possible nontarget effects of DCMU exposure on heterotrophic microorganisms (i.e., bacteria and fungi) and extracellular enzyme activity associated with decaying litter. Standing-dead Typha leaf litter was submerged for 34 and 73 d, returned to the laboratory, and used for controlled laboratory experiments that examined the effect of DCMU on algal ([¹⁴C]bicarbonate, pulse-amplitude modulated fluorometry), bacterial ([³H]leucine), and fungal ([¹⁴C]acetate) production. Simultaneous assays …

Social Class And Belonging: Implications For College Adjustment, Joan Ostrove

Faculty Publications

This study addressed the extent to which social class position structures a sense of belonging at college, and the ways in which belonging informs adjustment to college. Among 322 liberal arts college students, social class background was significantly associated with a sense of belonging at college and was marginally related to academic performance but was not related to the quality of the experience they were having at college. Sense of belonging mediated the relationship between class background and adjustment to college.

Index Theorems For Quantum Graphs, S. A. Fulling, P. Kuchment, J. H. Wilson

Faculty Publications

In geometric analysis, an index theorem relates the difference of the numbers of solutions of two differential equations to the topological structure of the manifold or bundle concerned, sometimes using the heat kernels of two higher order differential operators as an intermediary. In this paper, the case of quantum graphs is addressed. A quantum graph is a graph considered as a (singular) one-dimensional variety and equipped with a second-order differential Hamiltonian H (a 'Laplacian') with suitable conditions at vertices. For the case of scale-invariant vertex conditions (i.e. conditions that do not mix the values of functions and of their derivatives), …

Faculty Perceptions Of Technology Projects, Whitney Ransom Mcgowan, Charles R. Graham, Jon Mott

Faculty Publications

Significant investments in time, money, and effort go into developing and applying technology to improve teaching and learning. As universities pursue such projects, they must determine the impact and value of technology for student learning. During the past decade, funds spent on technology for educational purposes have tripled throughout the United States. Determining a hard return on investment (ROI) for the time and money spent to improve education is difficult, however. Institutions should also measure the value on investment (VOI) that their funds and efforts yield. In the study of faculty and their technology projects at Brigham Young University (BYU) …