4,301 research outputs found
The NASA SBIR product catalog
The purpose of this catalog is to assist small business firms in making the community aware of products emerging from their efforts in the Small Business Innovation Research (SBIR) program. It contains descriptions of some products that have advanced into Phase 3 and others that are identified as prospective products. Both lists of products in this catalog are based on information supplied by NASA SBIR contractors in responding to an invitation to be represented in this document. Generally, all products suggested by the small firms were included in order to meet the goals of information exchange for SBIR results. Of the 444 SBIR contractors NASA queried, 137 provided information on 219 products. The catalog presents the product information in the technology areas listed in the table of contents. Within each area, the products are listed in alphabetical order by product name and are given identifying numbers. Also included is an alphabetical listing of the companies that have products described. This listing cross-references the product list and provides information on the business activity of each firm. In addition, there are three indexes: one a list of firms by states, one that lists the products according to NASA Centers that managed the SBIR projects, and one that lists the products by the relevant Technical Topics utilized in NASA's annual program solicitation under which each SBIR project was selected
Dynamic Maps: Representations of Change in Geospatial Modeling and Visualization
By coining the descriptive phrase ―user-centric geographic cosmology, Goodchild (1998), challenges the geographically oriented to address GIS in the broadest imaginable context: as interlocutor between persons and geo-phenomena. This investigation responds both in a general way, and more specifically, to the representations of change in GIS modeling and visualization leading to dynamic mapping.
The investigation, consisting of a report and a series of experiments, explores and demonstrates prototype workarounds that enhance GIS capabilities by drawing upon ideas, techniques, and components from agent-based modeling and visualization software, and suggests shifts at the conceptual, methodological, and technical levels.
The workarounds and demonstrations presented here are four-dimensional visualizations, representing changes and behaviors of different types of entities such as living creatures, mobile assets, features, structures, and surfaces, using GIS, agent-based modeling and animation techniques. In a typical case, a creature begins as a point feature in GIS, becomes a mobile and interactive object in agent-based modeling, and is fleshed out to three dimensions in an animated representation. In contrast, a land surface remains much the same in all three stages. The experiments address change in location, orientation, shape, visual attributes, viewpoint, scale, and speed in applications representing predator-prey, search and destroy, sense and locate and urban sprawl. During the experiments, particular attention is paid to factors of modeling and visualization involved in engaging human sensing and cognitive abilities
Polar Cyclone Identification from 4D Climate Data in a Knowledge-Driven Visualization System
abstract: Arctic cyclone activity has a significant association with Arctic warming and Arctic ice decline. Cyclones in the North Pole are more complex and less developed than those in tropical regions. Identifying polar cyclones proves to be a task of greater complexity. To tackle this challenge, a new method which utilizes pressure level data and velocity field is proposed to improve the identification accuracy. In addition, the dynamic, simulative cyclone visualized with a 4D (four-dimensional) wind field further validated the identification result. A knowledge-driven system is eventually constructed for visualizing and analyzing an atmospheric phenomenon (cyclone) in the North Pole. The cyclone is simulated with WebGL on in a web environment using particle tracing. To achieve interactive frame rates, the graphics processing unit (GPU) is used to accelerate the process of particle advection. It is concluded with the experimental results that: (1) the cyclone identification accuracy of the proposed method is 95.6% when compared with the NCEP/NCAR (National Centers for Environmental Prediction/National Center for Atmospheric Research) reanalysis data; (2) the integrated knowledge-driven visualization system allows for streaming and rendering of millions of particles with an interactive frame rate to support knowledge discovery in the complex climate system of the Arctic region
NASA SBIR abstracts of 1990 phase 1 projects
The research objectives of the 280 projects placed under contract in the National Aeronautics and Space Administration (NASA) 1990 Small Business Innovation Research (SBIR) Phase 1 program are described. The basic document consists of edited, non-proprietary abstracts of the winning proposals submitted by small businesses in response to NASA's 1990 SBIR Phase 1 Program Solicitation. The abstracts are presented under the 15 technical topics within which Phase 1 proposals were solicited. Each project was assigned a sequential identifying number from 001 to 280, in order of its appearance in the body of the report. The document also includes Appendixes to provide additional information about the SBIR program and permit cross-reference in the 1990 Phase 1 projects by company name, location by state, principal investigator, NASA field center responsible for management of each project, and NASA contract number
Collaborative geographic visualization
Dissertação apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova de
Lisboa para a obtenção do grau de Mestre em Engenharia do Ambiente, perfil Gestão e
Sistemas AmbientaisThe present document is a revision of essential references to take into account when developing ubiquitous Geographical Information Systems (GIS) with collaborative
visualization purposes.
Its chapters focus, respectively, on general principles of GIS, its multimedia components and ubiquitous practices; geo-referenced information visualization and its graphical components of virtual and augmented reality; collaborative environments, its technological requirements, architectural specificities, and models for collective information management; and some final considerations about the future and challenges of collaborative visualization of GIS in ubiquitous environment
Conservation science in NOAA’s National Marine Sanctuaries: description and recent accomplishments
This report describes cases relating to the management of national marine sanctuaries in which certain scientific information was required so managers could make decisions that effectively protected trust resources. The cases presented represent only a fraction of difficult issues that marine sanctuary managers deal with daily. They include, among others, problems related to wildlife disturbance, vessel routing, marine reserve placement, watershed management, oil spill response, and habitat restoration. Scientific approaches to address these problems vary significantly, and include literature surveys, data mining, field studies (monitoring, mapping, observations, and measurement), geospatial and biogeographic analysis, and modeling. In most cases there is also an element of expert consultation and collaboration among multiple partners, agencies with resource protection responsibilities, and other users and stakeholders. The resulting management responses may involve direct intervention (e.g., for spill response or habitat restoration issues), proposal of boundary alternatives for marine sanctuaries or reserves, changes in agency policy or regulations, making recommendations to other agencies with resource protection responsibilities, proposing changes to international or domestic shipping rules, or development of new education or outreach programs. (PDF contains 37 pages.
Volcanic Activity: Processing of Observation and Remote Sensing Data (VAPOR)
The World Bank makes a very clear distinction between disasters and natural phenomena. Natural phenomena are events like volcanic eruptions. A disaster only occurs when the ability of the community to cope with natural phenomenon has been surpassed, causing widespread human, material, economic or environmental losses. By these definitions, volcanic eruptions do not have to lead to disasters. On November 13, 1985, the second most deadly eruption of the twentieth century occurred in Colombia. Within a few hours of the eruption of the Nevado del Ruiz volcano, 23,000 people were dead because no infrastructure existed to respond to such an emergency. Six years later, the 1991 eruption of Mount Pinatubo in the Philippines was the largest volcanic eruption in the 21st century to affect a heavily populated area. Because the volcano was monitored, early warning of the eruption was provided and thousands of lives were saved. Despite these improvements, some communities still face danger from volcanic events and volcano-monitoring systems still require further development. There remain clear gaps in monitoring technologies, in data sharing, and in early warning and hazard tracking systems. A global volcano-monitoring framework such as the VIDA framework can contribute to filling these gaps. VIDA stands for “VAPOR Integrated Data-sharing and Analysis” and is also the Catalan and Spanish word for ‘life’. The ultimate goal for this project is to help save the lives of people threatened by volcanic hazards, while protecting infrastructure and contributing to decision support mechanisms in disaster risk management scenarios
Three-dimensional hydrodynamic models coupled with GIS-based neuro-fuzzy classification for assessing environmental vulnerability of marine cage aquaculture
There is considerable opportunity to develop new modelling techniques within a
Geographic Information Systems (GIS) framework for the development of sustainable
marine cage culture. However, the spatial data sets are often uncertain and incomplete,
therefore new spatial models employing “soft computing” methods such as fuzzy logic
may be more suitable.
The aim of this study is to develop a model using Neuro-fuzzy techniques in a 3D GIS
(Arc View 3.2) to predict coastal environmental vulnerability for Atlantic salmon cage
aquaculture. A 3D hydrodynamic model (3DMOHID) coupled to a particle-tracking
model is applied to study the circulation patterns, dispersion processes and residence
time in Mulroy Bay, Co. Donegal Ireland, an Irish fjard (shallow fjordic system), an
area of restricted exchange, geometrically complicated with important aquaculture
activities.
The hydrodynamic model was calibrated and validated by comparison with sea surface
and water flow measurements. The model provided spatial and temporal information on
circulation, renewal time, helping to determine the influence of winds on circulation
patterns and in particular the assessment of the hydrographic conditions with a strong
influence on the management of fish cage culture.
The particle-tracking model was used to study the transport and flushing processes.
Instantaneous massive releases of particles from key boxes are modelled to analyse the
ocean-fjord exchange characteristics and, by emulating discharge from finfish cages, to
show the behaviour of waste in terms of water circulation and water exchange.
In this study the results from the hydrodynamic model have been incorporated into GIS
to provide an easy-to-use graphical user interface for 2D (maps), 3D and temporal
visualization (animations), for interrogation of results.
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Data on the physical environment and aquaculture suitability were derived from a 3-
dimensional hydrodynamic model and GIS for incorporation into the final model
framework and included mean and maximum current velocities, current flow quiescence
time, water column stratification, sediment granulometry, particulate waste dispersion
distance, oxygen depletion, water depth, coastal protection zones, and slope.
The Neuro-fuzzy classification model NEFCLASS–J, was used to develop learning
algorithms to create the structure (rule base) and the parameters (fuzzy sets) of a fuzzy
classifier from a set of classified training data. A total of 42 training sites were sampled
using stratified random sampling from the GIS raster data layers, and the vulnerability
categories for each were manually classified into four categories based on the opinions
of experts with field experience and specific knowledge of the environmental problems
investigated.
The final products, GIS/based Neuro Fuzzy maps were achieved by combining modeled
and real environmental parameters relevant to marine fin fish Aquaculture.
Environmental vulnerability models, based on Neuro-fuzzy techniques, showed
sensitivity to the membership shapes of the fuzzy sets, the nature of the weightings
applied to the model rules, and validation techniques used during the learning and
validation process. The accuracy of the final classifier selected was R=85.71%,
(estimated error value of ±16.5% from Cross Validation, N=10) with a Kappa
coefficient of agreement of 81%. Unclassified cells in the whole spatial domain (of
1623 GIS cells) ranged from 0% to 24.18 %.
A statistical comparison between vulnerability scores and a significant product of
aquaculture waste (nitrogen concentrations in sediment under the salmon cages) showed
that the final model gave a good correlation between predicted environmental
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vulnerability and sediment nitrogen levels, highlighting a number of areas with variable
sensitivity to aquaculture.
Further evaluation and analysis of the quality of the classification was achieved and the
applicability of separability indexes was also studied. The inter-class separability
estimations were performed on two different training data sets to assess the difficulty of
the class separation problem under investigation. The Neuro-fuzzy classifier for a
supervised and hard classification of coastal environmental vulnerability has
demonstrated an ability to derive an accurate and reliable classification into areas of
different levels of environmental vulnerability using a minimal number of training sets.
The output will be an environmental spatial model for application in coastal areas
intended to facilitate policy decision and to allow input into wider ranging spatial
modelling projects, such as coastal zone management systems and effective
environmental management of fish cage aquaculture
NASA SBIR abstracts of 1991 phase 1 projects
The objectives of 301 projects placed under contract by the Small Business Innovation Research (SBIR) program of the National Aeronautics and Space Administration (NASA) are described. These projects were selected competitively from among proposals submitted to NASA in response to the 1991 SBIR Program Solicitation. The basic document consists of edited, non-proprietary abstracts of the winning proposals submitted by small businesses. The abstracts are presented under the 15 technical topics within which Phase 1 proposals were solicited. Each project was assigned a sequential identifying number from 001 to 301, in order of its appearance in the body of the report. Appendixes to provide additional information about the SBIR program and permit cross-reference of the 1991 Phase 1 projects by company name, location by state, principal investigator, NASA Field Center responsible for management of each project, and NASA contract number are included
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