92,002 research outputs found
Web Single Sign-On Authentication using SAML
Companies have increasingly turned to application service providers (ASPs) or Software as a Service (SaaS) vendors to offer specialized web-based services that will cut costs and provide specific and focused applications to users. The complexity of designing, installing, configuring, deploying, and supporting the system with internal resources can be eliminated with this type of methodology, providing great benefit to organizations. However, these models can present an authentication problem for corporations with a large number of external service providers. This paper describes the implementation of Security Assertion Markup Language (SAML) and its capabilities to provide secure single sign-on (SSO) solutions for externally hosted applications
Tidal Estuary Morphodynamics of the Knik Arm
Presented to the Faculty
of the University of Alaska Anchorage
in Partial Fulfillment of the Requirements
For the Degree of
MASTER OF CIVIL ENGINEERINGA three-dimensional unsteady flow numerical model was developed to study
sediment transport due to tidal circulation within Knik Arm, a dynamic well mixed
macro-tidal sub-estuary of Cook Inlet in Alaska. The model was developed to gain a
better understanding of the mechanisms that are creating the Point MacKenzie Shoal,
located approximately 4 kilometers south of Port MacKenzie. Hydrodynamic conditions
within the estuary are very complex in that ebb-and-flood tides, freshwater mixing, and
wetting/drying of tidal mud flats significantly effects sediment transport within the
estuary.
A Mike 3 numerical model was applied to simulate the sediment transport within the
estuary under the action of tidal currents in the vicinity of the shoal. The computational
domain of this simulation includes four sediment laden freshwater sources; Matanuska,
Knik, Susitna, and Twenty-Mile Rivers as well as an open ocean boundary. The spatial
resolution of the triangulated flexible mesh model is 0.00045 degrees2 with a coupled fine
resolution model of 0.000045 degrees2.
The results of the numerical model are in agreement with previously collected field
data. Simulation results indicate the shoal formation is the result of turbid tidal flows and
deposition is occurring naturally.Signature Page / Title Page / Abstract / Table of Contents / List of Figures / List of Tables / Background / Introduction / Physical Setting / Sediment / Freshwater Sources / Water Properties / Tidal Datum / Numerical Model / Model Selection / Methodology / Model Domain / Hydrodynamics / Sediment Transport / Summary of Model Input / Results and Discussion / Conclusion / Acknowledgments Reference
Selecting communication media for distributed communities
Within the 'Virtual Mobility and Distributed Laboratories' project three naturalistic case studies of distributed research communities were conducted with a focus on the communication media used. The findings provide insight into relationships between the different media that the communities selected, and the different activities to which these media contributed. It is suggested that these findings are also relevant for distributed groups in which collaborative learning is the primary aim. A framework is presented for understanding and recommending selections of media for particular kinds of tasks, which is derived by integrating Mediaârichness Theory and Activity Theory. This framework indicates how task/media fit may be achieved while taking into account the evolving character of activities in a distributed community. Some implications of the framework for collaborative distance learning are highlighted.\ud
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Little green steps: sustainability practice for early years comes to WA.
Little Green Steps, a training workshop on education for sustainability for early years educators, was recently conducted by the Australian Association for Environmental Education - Western Australian Chapter (MEE-WAJ. With a grant from the Waste Authority of Western Australia, AAEE-WA was able to provide professional learning for staff of childcare services, kindergartens and preschools. The purpose of the training was to encourage sustainable practice through zero waste policy and practical implementation of these practices for children, staff and parents. This training was developed by Lady Gowrie Child Centre In Sydney and the Department of Environment, Climate Change and Water in New South Wales, and assisted in the setting up of the professional development component of Gosford City and Wyong Shire Councils' Little Green Steps Program. To increase national exposure to the program two days were offered in WA. Each day stood alone as a discrete training program
The diffusion of Mexican immigrants during the 1990s: explanations and impacts
Mexican immigrants were historically clustered in a few cities, mainly in
California and Texas. During the past 15 years, however, arrivals from
Mexico established sizeable immigrant communities in many ânewâ cities.
We explore the causes and consequences of the widening geographic
diffusion of Mexican immigrants. A combination of demand-pull and
supply push factors explains most of the inter-city variation in inflows of
Mexican immigrants over the 1990s, and also illuminates the most
important trend in the destination choices of new Mexican immigrants â
the move away from Los Angeles. Mexican inflows raise the relative
supply of low-education labor in a city, leading to the question of how
cities adapt to these shifts. One mechanism, suggested by the Hecksher
Olin model, is shifting industry composition. We find limited evidence of
this mechanism: most of the increases in the relative supply of loweducation
labor are absorbed by changes in skill intensity within narrowly
defined industries. Such adjustments could be readily explained if Mexican
immigrant inflows had large effects on the relative wage structures of
different cities. As has been found in previous studies of the local impacts
of immigration, however, our analysis suggests that relative wage
adjustments are small
Multidisciplinary research leading to utilization of extraterrestrial resources Quarterly status report, 1 Oct. 1967 - 1 Jan. 1968
Developing extraterrestrial resources technologies for using lunar and planetary resources to support manned mission
Signatures of hermitian forms and the Knebusch Trace Formula
Signatures of quadratic forms have been generalized to hermitian forms over
algebras with involution. In the literature this is done via Morita theory,
which causes sign ambiguities in certain cases. In this paper, a hermitian
version of the Knebusch Trace Formula is established and used as a main tool to
resolve these ambiguities.
The last page is an erratum for the published version. We inadvertently (I)
gave an incorrect definition of adjoint involutions; (II) omitted dealing with
the case . As , the
omission does not affect our reasoning or our results. For the sake of
completeness we point out where some small changes should be made in the
published version.Comment: This is the final version before publication. The last page is an
updated erratum for the published versio
Capital from an insurance company perspective
This paper was presented at the conference "Financial services at the crossroads: capital regulation in the twenty-first century" as part of session 5, "International capital allocation at financial institutions." The conference, held at the Federal Reserve Bank of New York on February 26-27, 1998, was designed to encourage a consensus between the public and private sectors on an agenda for capital regulation in the new century.Insurance industry ; Capital ; Risk
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