Digital Commons Network^™

A Framework For World Wide Web Client-Authentication Protocols, Cem Paya

Dartmouth College Undergraduate Theses

Existing client-authentication protocols deployed on the World Wide Web today are based on conventional distributed systems and fail to address the problems specific to the application domain. Some of the protocols restrict the mobility of the client by equating user identity to a machine or network address, others depend on sound password management strategies, and yet others compromise the privacy of the user by transmitting personal information for authentication. We introduce a new framework for client-authentication by separating two goals that current protocols achieve simultaneously: 1. Maintain persistent sense of identity across different sessions. 2. Prove facts about the user …

Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, Volume 14, Number 3, March 1998, College Of Engineering And Computer Science, Wright State University

BITs and PCs Newsletter

An eight page newsletter created by the Wright State University College of Engineering and Computer Science that addresses the current affairs of the college.

Single-Head Spin Modes In Frontal Polymerization, Victor M. Ilyashenko, John A. Pojman

Faculty Publications

The single-head spin mode is the first two-dimensional pattern of self-propagating thermal reaction fronts observed after the planar front loses stability. A "hot spot" is observed to propagate around the periphery of the front. The dynamics of the single-head frontal polymerization regime were studied experimentally, and two novel results were found. The "hot spot" was measured and found to be superadiabatic. The relationship between the rotational velocity and the propagating velocity was found. Experimental data were also compared with the theoretical results based on the linear stability analysis and found to be in a reasonable agreement. (C) 1998 American institute …

Through A Lens Darkly--Superfund Spectacles On Public Participation At Brownfield Sites, Kris Wernstedt, Robert Hersh

RISK: Health, Safety & Environment (1990-2002)

The authors discuss the recent trend in brownfield site development against a backdrop of Superfund experience and explore current barriers to public participation.

A Statistical Study Of The Magnetic Signatures Of Ftes Near The Dayside Magnetopause, Jeff Sanny, C. Beck, D. G. Sibeck

Physics Faculty Works

During magnetopause crossings, the AMPTE CCE satellite frequently observed flux transfer events (FTEs) characterized by fluctuations in the magnetic field strength (B) and bipolar signatures in the field component (B_N) normal to the nominal magnetopause. In this study, we survey 110 events observed from October to December 1984 and during January 1986. Nearly all events exhibited increases in B, and although the majority of events exhibited a symmetric bipolar signature in B_N, a significant number (31 of 110) had asymmetric bipolar signatures in which the trailing pulse was dominant. Most of the …

A Study On The Uptake And Voltammetric Determination Of Trace Heavy Metals In The Treated Wastewater In Abu-Dhabi Area, Salem Rashed Salem Al-Hassani

Theses

Wastewater reuse has a positive and negative environmental impacts and possibly it can have an important role to play in water resources management, as a substituent for freshwater in irrigation. However, the presence of the toxic heavy metals in domestic sewage and in industrial effluents discharge to sewers, wastewater can create unacceptable health and environmental risks. Therefore, the present work includes the determination of the toxic heavy metals in some treated wastewater samples collected from Abu-Dhabi area using polarographic and voltammetric techniques. Differential pulse polarography and anodic stripping voltammetry are well established techniques for trace determination of heavy metals content …

The Probe, Issue 185 – February 1998

The Probe: Newsletter of the National Animal Damage Control Association

Animal Rights Groups Should Give Shelters Money, by Susan E. Paris
In Memoriam--Obituary: Norton R. Miner
From the President -- Robert H. Giles, Jr., President, NADCA
Job Announcements: 1. Coordinator, Isabela Project, Galapagos National Park Service; 2. Leader of Eradication Program Galapagos National Park Service
Brochure Provides Advice to Ranchers on Wolf Livestock Kills
Seattle Coyote Gets A Lift
Radio Says "No Thanks" to Fund
Oregon Mink Farms Attacked
Rabies Down, Tapeworms Up in European Foxes

More Reports From the 4th Annual Conference of The Wildlife Society:
Linking Spatial Heterogeneity and Social Behavior to Carnivore Population Dynamics: Development and Evaluation …

Zebra Image Access System, Srilekha Mudumbai, Kshitij Shah, Amit P. Sheth, Krishnan Parasuraman, Clemens Bertram

Kno.e.sis Publications

The ZEBRA system, which is part of the VisualHarness platform for managing heterogeneous data, supports three types of access to distributed image repositories: keyword based, attribute based, and image content based. A user can assign different weights (relative importance) to each of the three types, and within the last type of access, to each of the image properties. The image based access component (IBAC) supports access based on computable image properties such as those based on spatial domain, frequency domain or statistical and structural analysis. However, it uses a novel black box approach of utilizing a Visual Information Retrieval (VIR) …

Biodegradation Of Pah Contaminated Soil And Sludge Using Non-Ionic Surfactants, Seema Narula

Dissertations

Polycyclic aromatic hydrocarbons (PAHs) are one of the most prevalent environmental pollutants contaminating a large number of industrial and Superfund sites. Low solubility and sorption to solid surfaces limit biodegradation rates of PAHs in the environment. Bioremediation of these compounds have been previously tested with partial success. In the present study, aerobic biodegradation of three PAHs (fluorene, phenanthrene, and pyrene) has been studied in shaker flasks, batch fermenter, and bioslurry reactor, in the presence of non-ionic surfactants. A mixed bacterial culture derived from both a refinery sludge and an activated sludge was used as the seed population in the degradation …

Effects Of Surfactants And Fenton's Reagents On Extraction And Destruction Of Phenanthrene In Spiked Sand, Ming-Chin Chang

Dissertations

In this study, surfactants and Fenton's reagents (Fe(II) and H₂0₂) ere proposed to solve contaminated site problems in situ on a lab scale. Phenanthrene is a simple PAHs (polynuclear aromatic hydrocarbons). The phenanthrene spiked ottawa sand simulated contaminated soil. HPLC was used for phenanthrene analysis because it provided excellent separation and no interference. Six surfactants (including nonionic and ionic) were tested. The operating conditions were optimized based on process and economic considerations such as reaction time, mixing speed, concentrations of surfactants and concentrations of Fenton's reagents. Surfactants could effectively dissolve phenanthrene from the spiked sand. In …

Applications Of Internet Technology For Requirements Elicitation, Deepak Pandit

Theses

During the Requirements Elicitation part of a project various stakeholders need to be able to communicate their requirements to the developers, and the developers need to be able communicate their understanding back to the stakeholders. Communication between the various members of the project is the key factor during the Requirements Elicitation part of a project. Easing communications between stakeholders and developers makes the process of eliciting requirement easier, leading to better requirements specification and eventually a better product.

The Requirements Elicitation Process through Internet (REPI) web site has been designed and implemented to explore this idea. The prototype version of …

Biological And Management Implications Of Fire-Pathogen Interactions In The Giant Sequoia Ecosystem, Douglas D. Piirto, John R. Parmeter Jr., Fields W. Cobb Jr., Kevin L. Piper, Amy C. Workinger, William J. Otrosina

Natural Resources Management and Environmental Sciences

An overriding management goal for national parks is the maintenance or, where necessary, the restoration of natural ecological processes. In Sequoia-Kings Canyon and Yosemite National Parks, there is concern about the effects of fire suppression on the giant sequoia-mixed conifer forest ecosystem. The National Park Service is currently using prescribed fire management and prescribed burning as tools to reintroduce fire as a natural process. However, there are questions about the positive and negative effects of reintroducing fire in the giant sequoia-mixed conifer ecosystem. Reintroducing fire in the Sierra Nevada forests needs critical evaluation with respect to the pathogens that affect …

Arginine To Glutamine Substitutions In The Fourth Module Of Xenopus Interphotoreceptor Retinoid-Binding Protein, Mark S. Braiman, Claxton A. Baer, Ellen E. Van Niel, Jeffrey W. Cronk, Michael T. Kinter, Nicholas E. Sherman, Federico Gonzalez-Fernandez

Chemistry - All Scholarship

Interphotoreceptor retinoid-binding protein (IRBP) is unusual for a lipid-binding protein in that its gene is expressed uniquely by cells of photoreceptor origin and consists of four homologous repeats, each coding for a module of~300 amino acid residues. All-trans retinol binding domains, which appear to be present in each module, are composed of conserved hydrophobic regions [Baer et al, Exp Eye Res 1998; 66:249-262]. Here we investigate the role of highly conserved arginines contained in these regions.

Winchell Papers

Journal of the Minnesota Academy of Science

Abstracts from the Winchell Papers given at the 66^th Annual Meeting for the Journal of the Minnesota Academy of Science.

Geophysical Characterization, Redox Zonation, And Contaminant Distribution At A Groundwater/Surface Water Interface, John Lendvay, W A. Sauck, M L. Mccormick, M J. Barcelona, D H. Kampbell, J T. Wilson, P Adriaens

Environmental Science

Three transects along a groundwater/surface water interface were characterized for spatial distributions of chlorinated aliphatic hydrocarbons and geochemical conditions to evaluate the natural bioremediation potential of this environmental system. Partly on the basis of ground penetrating radar measurements, a conductive sediment layer was detected from the shore out to at least 300 m offshore which exhibited gradients in redox pairs and contaminant profiles. The cis-Dichloroethene and 1-chloroethene were predominant in the presence of elevated methane and ferrous iron concentrations and depressed sulfate and aquifer solids-bound iron concentrations. The shallow monitoring points were generally hypoxic to aerobic and exhibited values …

A Multithreaded Message-Passing System For High Performance Distributed Computing Applications, Sung-Yong Park, Joohan Lee, Salim Hariri

Electrical Engineering and Computer Science - All Scholarship

High Performance Distributed Computing (HPDC) applications require low-latency and high-throughput communication services and HPDC applications have different Quality of Service (QOS) requirements (e.g., bandwidth requirement, flow/error control algorithms, etc.). The communication services provided by traditional message-passing systems are fixed and thus can not be changed to meet the requirements of different HPDC applications. NYNET (ATM wide area network testbed in New York state) Communication System (NCS) is a multithreaded message-passing system developed at Syracuse University that provides high-performance and flexible communication services. In this paper, we overview the general architecture of NCS and present how NCS communication services are implemented. …

Performance Enhancement Using Intra-Server Caching In A Continuous Media Server, Chutimet Srinilta, Alok Choudhary

Electrical Engineering and Computer Science - All Scholarship

Continuity of stream playback is the crucial constraint in designing a continuous media server. From a distributed memory architectural model developed earlier, we found that there were many points where the stream capacity of the server could be improved. The stream capacity was usually limited by the storage bottlenecks. Serving streams from memory cache eliminates disk accesses and data transfers between nodes which, in turn, helps relieve those bottlenecks. However, the capacity of the server ultimately depends on client access pattern. Client request assignment has an impact on cache hit ratio as well as workload distribution. It is also the …

Ai And The Changing Face Of Health Care, Erika Rogers

Computer Science and Software Engineering

No abstract provided.

Interactive Image Cases For Medical Problem Solving, Erika Rogers, Barb Ericson

Computer Science and Software Engineering

The development of an intelligent assistance agent for diagnostic radiology faces a number of challenges: e.g., how to gain access to the knowledge used an such visual problem solving tasks, how to operationalize it for further processing, and how to present it an the most useful manner for diagnosis. Our previous work an this domain placed an emphasis on the first two issues, and has shown that both perception and problem solving need to be supported an these types of tasks. However, the interface to the underlying intelligence in our first prototypes did not reflect how medical practitioners physically interact …

Environmental Science Curriculum For Eleventh Through Twelfth Grade Classes, Jenelle Sue Bryan

Theses Digitization Project

No abstract provided.

Magnetic Control Of Convection In Nonconducting Paramagnetic Fluids, J. Huang, Boyd F. Edwards, D. D. Gray

All Physics Faculty Publications

An inhomogeneous magnetic field exerts a magnetic body force on magnetically permeable fluids. A recent experiment [D. Braithwaite, E. Beaugnon, and R. Tournier, Nature (London) 354, 134 (1991)] demonstrates that this force can be used to compensate for gravity and to control convection in a paramagnetic solution of gadolinium nitrate. We provide the theory of magnetically controlled convection in a horizontal paramagnetic fluid layer heated from either above or below. Our theoretical predictions agree with the experiments.

Ua3/9/6/1 Programs Of Distinction, Gary Ransdell, Wku President's Office

WKU Administration Documents

Gary Ransdell interview regarding programs of distinction by unidentified reporter.

Influence Of Thermal Conductive Material On The Activation Energy Of Amorphous Silicon Thin Films, Sevilay Uğur, Merih Seri̇n

Turkish Journal of Physics

The activation energy of amorphous silicon thin films are usually measured by placing the thin film sample on a heating surface and monitoring the change in the dark conductivity as a function of temperature. The most widely used devices for temperature measurements are surface thermometers and thermocouples. Sensors such as surface thermometers or thermocouples simply measure temperature by reaching an equilibrium state with the measured environment. If the heat conduction to the sensor somehow is obscured by several reasons (sensors having a much larger dimensions than the thin film or not having proper vacuum) different thermal conduction to the sensor …

Vibrational Sum Frequency Spectroscopy Of Surfactants And Phospholipids Monolayers At Liquid-Liquid Interfaces, B. L. Smiley, R. A. Walker, D. E. Gragson, T. E. Hannon, G. L. Richmond

Chemistry and Biochemistry

Work from our laboratory on vibrational sum frequency spectroscopic investigations of molecular ordering at the carbon tetrachloride-water interface is reviewed. Simple charged surfactants adsorbed at the liquid-liquid interface are seen to induce alignment of interfacial water molecules to a degree which is dependent on the induced surface potential. Saturation of water molecule alignment occurs at a surfactant surface concentration corresponding to a calculated surface potential of approximately 160 mV. In complementary studies, the relative degree of hydrocarbon chain ordering within monolayers of symmetric phosphatidylcholines of different chain lengths is inferred by the relative signal contributions of the methyl and methylene …

Beaver Dam Wash Instream Flow Assessment, United States Bureau Of Land Management

All U.S. Government Documents (Utah Regional Depository)

This report documents findings from an instream flow assessment conducted by the U.S. Bureau of Land Management (BLM) on Beaver Dam Wash in Mohave County, Arizona. The assessment, which focused on resources located at the mouth of Beaver Dam Wash from 1991 through 1994, provides a scientific basis for relating flowdependent resources to streamflow levels. Natural resource values, methods of data collection and analysis, and flow requirements are presented in this report.

Invasive Plants: Changing The Landscape Of America, Federal Interagency Committee For The Management Of Noxious And Exotic Weeds, Randy G. Westbrooks

All U.S. Government Documents (Utah Regional Depository)

In the 1950s, the American public became aware that certain chemicals endanger human health and the environment. In response to this threat, new rules and regulations regarding chemical manufacture, use, and disposal were developed under state and federal law. Today, the public has a much better understanding of the chemical pollution problem and generally supports management efforts. The 1990s have brought us face to face with another serious environmental threat: The invasion of the American landscape by aggressive nonnative plants. While farmers have always fought a battle with weeds in crops, invasion of these and other formerly weed-free lands has …

Mud Creek Urban Nonpoint Source Demonstration, Paul Vendrell, K. Teague

Arkansas Water Resources Center Technical Reports

Northwest Arkansas is the seventh fastest developing area in the nation. The conversion of rolling pastureland into paved city streets, parking lots, and buildings within this rapidly urbanizing region is reducing infiltration and intensifying stormwater runoff. In the city of Fayetteville alone, the population increased from 42,099 to 58,163 between 1990 and 1999, moving the city across the population threshold which will require the Phase II Stormwater Permit process. Approximately half of Fayetteville is included in the Illinois River Watershed, which has been identified as the third highest priority watershed in need of restoration in the state of Arkansas. Mud …

A Lattice Model For Computing The Transmissivity Of The Cornea And Sclera, David B. Ameen, Marilyn F. Bishop, Tom Mcmullen

Physics Publications

Abstract

The method of photonic band structure is used to calculate the frequencies of light that propagate in lattice models of the cornea and sclera of the mammalian eye, providing an explanation for transparency in the cornea that first properly accounts for multiple scattering of light. Each eye tissue is modeled as an ordered array of collagen rods, and photonic band structure methods are used to solve Maxwell's equations exactly for these models, a procedure that automatically effectively includes all orders of multiple scattering. These calculations show that the dispersion relation for the cornea is linear in the visible range, …

Teachers And Students Investigating And Communicating About Geometry: The Math Forum, K. Ann Renninger, S. A. Weimar, Eugene A. Klotz

Educational Studies Faculty Works

No abstract provided.

Santa Clara Magazine, Volume 39 Number 4, Winter 1998, Santa Clara University

Santa Clara Magazine

10 - INSIDE OUT Francisco Jimenez, chairman of the University's Modern Languages and Literatures Department, recalls his grade-school days and immigrant family.

14 - FROM HALLOWED TO HIP Connie Hinckley, East Bay writer, examines the media's many-faceted portrayals of the priesthood, especially the controversial Father Ray of Nothing Sacred.

20 - SANTA CLARA'S ADOBE LEGACY Susan Vogel, San Francisco author and publisher, traces the history of the Adobe Lodge and describes its many roles in the life of the University.

26 - UNCOVERING THE REGION'S RICH PAST As the University clears land for new buildings, SCU archeologists and Native American …