Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
Superhard Nanocrystalline Homometallic Stainless Steel on Steel for Seamless Coatings Project
Published By U.S. Geological Survey, Department of the Interior
Issued almost 10 years ago
Summary
Description
The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) is an advanced multispectral imager that was launched on board NASA's Terra spacecraft in December, 1999. The ASTER Level-1B data are L1A data with the radiometric and geometric coefficients applied. All of these data are stored together with metadata in one HDF file. The L1B image is projected onto a rotated map (rotated to path oriented coordinate) at full instrument resolutions. The Level-1B data generation also includes registration of the SWIR and TIR data to the VNIR data. And in addition, for SWIR in particular, the parallax errors due to the spatial locations of all of its bands are corrected. The Level-1B data set provides scaled or calibrated radiance values, and is the input for most of the higher-level products.
Published By National Oceanic and Atmospheric Administration, Department of Commerce
Issued almost 10 years ago
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Description
These data were created as part of the National Oceanic and Atmospheric Administration Office for Coastal Management's efforts to create an online mapping viewer called the Sea Level Rise and Coastal Flooding Impacts Viewer. It depicts potential sea level rise and its associated impacts on the nation's coastal areas. The purpose of the mapping viewer is to provide coastal managers and scientists with a preliminary look at sea level rise (slr) and coastal flooding impacts. The viewer is a screening-level tool that uses nationally consistent data sets and analyses. Data and maps provided can be used at several scales to help gauge trends and prioritize actions for different scenarios. The Sea Level Rise and Coastal Flooding Impacts Viewer may be accessed at: http://www.coast.noaa.gov/slr This metadata record describes the digital elevation model (DEM) for the coastline of Connecticut, which is a part of a series of DEMs produced for the National Oceanic and Atmospheric Administration Office for Coastal Management's Sea Level Rise and Coastal Flooding Impacts Viewer, described above. This DEM includes the best available lidar known to exist at the time of DEM creation that met project specifications, for the shoreline of Connecticut, which includes the coastal areas of the counties of Fairfield, New Haven, Middlesex, and New London Counties. The DEM was produced from the following lidar datasets: 1. 2011 USGS Lidar for the Northeast 2. 2012 USACE Post Sandy Lidar 3. 2011 Quinnipiac River Lidar 4. 2010 USDA-NRCS/USACE Topographic Lidar: Eastern Connecticut 5. 2006 FEMA Coastal Connecticut Lidar 6. 2004 Connecticut River Lidar 7. UCONN Center for Land Use Education Research (CLEAR) 10ft DEMs Hydrographic breaklines were delineated from LiDAR intensity imagery generated from the LiDAR datasets. The final DEM is hydro flattened such that water elevations are less than or equal to -0.5 meters. The DEM is referenced vertically to the North American Vertical Datum of 1988 (NAVD88) with vertical units of meters and horizontally to the North American Datum of 1983 (NAD83). The resolution of the DEM is approximately 10 meters.
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
We propose an improved cathode based on our novel theory of the role of scandium oxide in enhancing emission in tungsten-impregnated cathodes. Recent results have demonstrated the efficacy of nano-particle scandium oxide, but a detailed theory on the mechanism of operation has been lacking. Our theory explains published data and points to an optimized cathode, which we propose here to build and test. The cathode is the performance-limiting component in high-frequency linear beam amplifiers such as traveling wave tubes and klystrons. The required bandwidth, data rate, number of channels, frequency, and output power are going up. The performance of linear beam amplifiers is acutely limited by current cathode performance. Scandate cathodes offer a way to increase top emission from 10 A/cm2 to at least 50 A/cm2. Phase I proved the feasibility of applying layers on unagglomerated scandium oxide on impregnated cathodes. Phase II will optimize, test, and commercialize the process.
Published By National Oceanic and Atmospheric Administration, Department of Commerce
Issued almost 10 years ago
Summary
Description
Ocean sediment thickness contours in 200 meter intervals for water depths ranging from 0 - 18,000 meters. These contours were derived from a global sediment thickness grid distributed by the National Geophysical Data Center (NGDC). The NGDC grid was compiled from various existing sediment thickness maps and drilling cores, and has a cell resolution of 5 arc seconds. Sediment thickness data is typically acquired through two methods. Seismic (or sub-bottom) profile technologies rely on powerful pulses of low-frequency sound which penetrate the substrate and return information about substrate thickness, character, and stratification. The data are collected along transect lines and require interpolation to create comprehensive maps. Sediment thickness is also determined by direct measurement through coring, which provides more detailed information but only at discrete sites. Coring data can also be interpolated to form area maps, and to help interpret the seismic data.
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) was launched on April 28, 2006 to study the impact of clouds and aerosols on the Earth’s radiation budget and climate. It flies in formation with five other satellites in the international “A-Train” (PDF) constellation for coincident Earth observations. The CALIPSO satellite comprises three instruments, the Cloud-Aerosol LIdar with Orthogonal Polarization (CALIOP), the Imaging Infrared Radiometer (IIR), and the Wide Field Camera (WFC). CALIPSO is a joint satellite mission between NASA and the French Agency, CNES.
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
High power, compact, reliable and affordable power amplifiers operating in the W-band (94 GHz region) are critical to realizing transmitters for many NASA missions and other significant applications for remote sensing and environmental measurements. QuinStar Technology proposes novel approach for a family of solid state power amplifiers (SSPA) that will exceed the performance and operational requirements for measurement instruments and monitoring equipment of the future. Proposed approach is based on optimal combination of unique techniques for highly efficient and yet robust power combining, circuit integration and innovative packaging methods. This also leads to affordable products suitable for space, airborne as well as terrestrial applications. Key features of the proposed implementation are: scalability of power output, compact, lightweight, flexible architecture and high reliability with very significant potential for performance improvement and price reduction as MMIC device technology matures further. Initial objective of proposed effort is to achieve greater than 50 Watts of power output at 94 GHz at greater than 20% duty cycle and with 40 dB or more gain. Phase I work will focus on innovative robust designs for power combining, packaging and select device/material s. Phase I effort will lead to a producible and scalable design baseline that will be used in Phase II for manufacturing deployable products.
Published By US Fish and Wildlife Service, Department of the Interior
Issued almost 10 years ago
Summary
Description
The grassland management objectives for Big Stone National Wildlife Refuge are: 1 to provide secure nesting cover for ground nesting waterfowl. The refuge objective for ground nesting waterfowl is 3,200 ducklings fledged; 2 to restore and enhance native prairie; 3 to provide quality grassland habitat for game and nongame wildlife species which inhibit grasslands; and 4 to promote public understanding of grassland ecosystems and grassland management. This plan will delineate those portions of the refuge that are to be maintained as grasslands and discuss methods by which this will be accomplished. It will differentiate between native prairie and seeded grasslands both domestic and native. Because they are in a constant state of flux, the specifics of seeded grasslands, i.e., seed bed preparation, field size, location, species composition, etc. will be maintained in the refuge files. The refuge has 378 acres of goback which cannot be economically maintained as grasslands due to the high water table, annual flooding, etc. This acreage is composed primarily of the transition zone between grasslands and lower habitats. Goback will not be addressed in this plan.
Published By Department of Agriculture
Issued almost 10 years ago
Summary
Description
A map service on the www depicting existing National Forest System Roads (NFSR) that are under the jurisdiction of the U.S. Forest Service. Each feature represents a segment of a road, along which all of the attributes are the same. A road is a motor vehicle travel way over 50 inches wide, unless classified and managed as a trail.
Published By US Census Bureau, Department of Commerce
Issued almost 10 years ago
Summary
Description
The 2014 cartographic boundary shapefiles are simplified representations of selected geographic areas from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). These boundary files are specifically designed for small-scale thematic mapping. When possible, generalization is performed with the intent to maintain the hierarchical relationships among geographies and to maintain the alignment of geographies within a file set for a given year. Geographic areas may not align with the same areas from another year. Some geographies are available as nation-based files while others are available only as state-based files. The primary legal divisions of most states are termed counties. In Louisiana, these divisions are known as parishes. In Alaska, which has no counties, the equivalent entities are the organized boroughs, city and boroughs, municipalities, and for the unorganized area, census areas. The latter are delineated cooperatively for statistical purposes by the State of Alaska and the Census Bureau. In four states (Maryland, Missouri, Nevada, and Virginia), there are one or more incorporated places that are independent of any county organization and thus constitute primary divisions of their states. These incorporated places are known as independent cities and are treated as equivalent entities for purposes of data presentation. The District of Columbia and Guam have no primary divisions, and each area is considered an equivalent entity for purposes of data presentation. The Census Bureau treats the following entities as equivalents of counties for purposes of data presentation: Municipios in Puerto Rico, Districts and Islands in American Samoa, Municipalities in the Commonwealth of the Northern Mariana Islands, and Islands in the U.S. Virgin Islands. The entire area of the United States, Puerto Rico, and the Island Areas is covered by counties or equivalent entities.
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
With more missions at high data rates demanding use of limited spectral resources, NASA's SCaN office recently coordinated a study to identify a space communications architecture to support future missions. The study recommends precoded GMSK and AR4JA LDPC codes as preferred options in most Space Network and Ground Network forward and return links and Deep Space Network return links. This modulation and coding pair provides excellent bandwidth-efficiency and greatly reduced transmitter SWaP. Unfortunately, there are no high-data-rate AR4JA LDPC devices currently available and existing GMSK receivers operate far from the performance predicted by theory, especially in the presence of severe channel and equipment impairments. Phase I provided a design of a soft-decision generating GMSK demodulator integrated with an AR4JA LDPC decoder and with estimation and compensation of a comprehensive set of severe impairments. Fixed-point simulations show performance within a small fraction of a dB of the performance with far less bandwidth-efficient modulations such as BPSK. The results of this effort show the technical and commercial viability of an integrated GMSK/AR4JA LDPC design. The proposed Phase 2 effort involves the development and delivery of a prototype transmitter and receiver to demonstrate the superior capabilities offered by this innovation and enable subsequent commercialization. A simple and highly flexible GUI system for prototype configuration and control and modular API design will allow Phase II refinement of the design and facilitate integration in future commercial products.
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
<p>TBD</p>
Published By Federal Emergency Management Agency, Department of Homeland Security
Issued almost 10 years ago
Summary
Description
The Floodplain Mapping/Redelineation study deliverables depict and quantify the flood risks for the study area. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual- chance flood event, and areas of minimal flood risk. The Floodplain Mapping/Redelineation flood risk boundaries are derived from the engineering information Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA).
TIGER/Line Shapefile, 2013, Series Information File for the Current Topological Faces-Area Landmark Relationship Files
Published By US Census Bureau, Department of Commerce
Issued almost 10 years ago
Summary
Description
The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). The MTDB represents a seamless national file with no overlaps or gaps between parts, however, each TIGER/Line shapefile is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. The Topological Faces / Area Landmark Relationship File (FACESAL.dbf) contains a record for each face / area landmark relationship. Face refers to the areal (polygon) topological primitives that make up MTDB. A face is bounded by one or more edges; its boundary includes only the edges that separate it from other faces, not any interior edges contained within the area of the face. The face to which a record in the Topological Faces / Area Landmark Relationship File (FACESAL.dbf) applies can be determined by linking to the Topological Faces Shapefile (FACES.shp) on the permanent topological face identifier (TFID) attribute. The area landmark to which a record in the Topological Faces / Area Landmark Relationship File (FACESAL.dbf) applies can be determined by linking to the Area Landmark Shapefile (AREALM.shp) on the area landmark identifier (AREAID) attribute. A face may be part of multiple area landmarks. An area landmark may consist of multiple faces.
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
High Emissivity Protective Cerablak Coatings for Metallic TPS Project
Published By National Oceanic and Atmospheric Administration, Department of Commerce
Issued almost 10 years ago
Summary
Description
The National Oceanic and Atmospheric Administration (NOAA) has the statutory mandate to collect hydrographic data in support of nautical chart compilation for safe navigation and to provide background data for engineers, scientific, and other commercial and industrial activities. Hydrographic survey data primarily consist of water depths, but may also include features (e.g. rocks, wrecks), navigation aids, shoreline identification, and bottom type information. NOAA is responsible for archiving and distributing the source data as described in this metadata record.
Published By U.S. Department of Health & Human Services
Issued almost 10 years ago
Summary
Description
Access-to-Care
Ceramic Heat Exchangers and Chemical Reactors with Micro-Scale Features for In-Situ Resource Processing Project
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
It is proposed to develop compact and lightweight ceramic heat exchangers and chemical reactors suitable for high temperature processes. These devices will have micro-scale geometric features that would result in very high heat and mass transfer rates per unit volume and per unit frontal area. The process for fabrication of these devices is based on a novel micro-machining and joining technique that promises to deliver ceramics components that can survive temperatures in excess of 1000 oC, and moderate to high pressures. As ceramics are the natural host for a large number of catalysts, the proposed devices would allow fabrication of extremely compact chemical reactors capable of operating at high temperatures. These devices can be used to thermally couple exothermic and endothermic reactions. Furthermore, temperature-sensitive reactive streams can be coupled to heat transfer streams to achieve temperature-controlled chemical reactions at high catalytic conversion and selectivity. Examples would include integrated catalytic combustor and heat exchanger, coupled catalytic combustion and steam reforming, and coupled Sabatier and Reverse Water Gas Shift reactions.
Ultra-Low Noise Quad Photoreceiver for Space Based Laser Interferometric Gravity Wave Detection Project
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
Gravity wave detection using space-based long-baseline laser interferometric sensors imposes stringent noise requirements on the system components, including the large area photoreceiver front ends. The proposed innovation utilizes dual depletion region technology to produce a large area (1mm diameter) 2x2 quad p-i-n InGaAs photodiode array having ~2.1pF capacitance per quadrant. The small capacitance of the quad photodiode array is leveraged in combination with a low-noise JFET-input operational amplifier to manufacture ultra-low noise quad photoreceiver array. Each element (quadrant) of the photoreceiver array will have an input equivalent current noise <2pA/sq.rt. Hz in a frequency range of 2 to 20MHz. This will enable shot noise dominated performance at an optical local oscillator power of ~100mW per quadrant.
Zebrafish gene expression, histology, blood domoic acid level, and behavioral data (Effects of Chronic Domoic Acid Exposure on Gene Expression in the Vertebrate CNS.)
Published By National Oceanic and Atmospheric Administration, Department of Commerce
Issued almost 10 years ago
Summary
Description
The potential impacts of chronic algal toxin exposure have long been a concern. One HAB toxin, domoic acid (DA), is a potent neurotoxin that interacts with the vertebrate central nervous system (CNS). Although the clinical signs of acute DA toxicity have been well defined, virtually nothing is known about the impacts of chronic, low-level toxin exposure, primarily due to the difficulties associated with long-term exposure studies. We know that vertebrates such as fish, seabirds, marine mammals, and humans are exposed to DA on a regular basis at levels below those that cause outward signs of toxicity, yet we have no idea how these chronic sub-acute exposures may impact these organisms. In this study, we use global gene expression in whole brain and morphological aberrations in major organ systems as endpoints to examine the effects of chronic exposure. The overall goal of this project is to develop a general model for the characterization of gene expression effects in the vertebrate CNS and morphological damage in major organs associated with long-term, low-level toxin exposure.Objectives-The objectives of the proposed study are to 1) quantify gene expression changes in the vertebrate CNS and characterize differentially expressed genes based on function to identify potential pathways of chronic disease associated with long-term, low-level algal toxin exposure, 2) quantify actual blood toxin levels associated with changes in gene expression, and 3) perform histologic examinations of all major organ systems to characterize morphological impacts of chronic toxicity.Approach-Our approach will be to use microchip gene array technology to quantify differential gene expression in whole brain during a one-year DA exposure study using a vertebrate model system (zebrafish, Danio rerio). Through pilot studies, we have quantified appropriate sub-acute doses, developed effective repetitive dosing procedures, and developed a statistically rigorous experimental design. We have also perfected RNA isolation methods, microchip array procedures, qRT-PCR confirmation procedures, and bioinformatics processes for grouping and identifying genes. In addition to gene expression analyses, we will use standard histology procedures to visualize potential morphological aberrations caused by chronic DA exposure.Expected Results- We expect this research will yield several results that will directly aid assessments of HAB impacts on ecosystems. First, the proposed project will provide the first available data on the impacts of chronic, low-level algal toxin exposure using a realistic long-term exposure time scale. It is also likely that new pathways of DA toxicity will be identified since a single dose exposure pilot study has already revealed gene expression patterns unique to sub-acute exposure. The gene lists generated will be widely disseminated and publicly available for researchers to use as a starting point for species-specific studies on chronic HAB toxin exposure effects. Finally, the study will quantify actual blood toxin levels that are associated with the observed gene expression effects. These blood toxin levels can be used for characterizing the potential risk to other vertebrates exposed to DA in the field. Gene expression data, blood DA levels, brain histology, survival, mitochondrial function, behavior and dose response data.
Published By Department of Transportation
Issued almost 10 years ago
Summary
Description
The 1995 American Travel Survey (ATS) was conducted by the Bureau of Transportation Statistics (BTS) to obtain information about the long-distance travel of persons living in the United States. The survey collected quarterly information related to the characteristics of persons, households, and trips of 100 miles or more for approximately 80,000 American households.The ATS data provide detailed information on state-to-state travel as well as travel to and from metropolitan areas by mode of transportation. Data are also available for subgroups defined in terms of characteristics related to travel, such as trip purpose, age, family type, income, and a variety of related characteristics. The data can be analyzed at the regional, state, metropolitan area, and county level.NOTE: In 2001, the National Household Travel Survey was carried out. This new survey is a combined Nationwide Personal Transportation Survey (NPTS) and ATS.
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
The proposed program will develop highly reliable, hermetic, Si3N4 ceramic multichip modules to integrate commercially available SiC power devices to build power electronic modules for reliable operation above 500:C in extreme environments of space exploration. The Phase I program will demonstrate a reliable direct bond copper (DBC) process for Si3N4 substrates, develop high current carrying hermetic feedthroughs, an innovative transient liquid phase (TLP) die attach, and a monometallic wire bonding capable of reliable operation above 500:C; and fabricate and test a hermetic single-chip module.
Published By Department of Veterans Affairs
Issued almost 10 years ago
Summary
Description
2009 Percent of respondents who rate the quality of service provided by the National Cemeteries as excellent.
Federal Justice Statistics Program: Statutes for Counts of Conviction for Defendants Sentenced Under the Sentencing Reform Act, 1999 [United States]
Published By Department of Justice
Issued almost 10 years ago
Summary
Description
These data contain records of statutes for each count of conviction for criminal defendants who were sentenced pursuant to provisions of the Sentencing Reform Act (SRA) of 1984 and reported to the United States Sentencing Commission (USSC) during fiscal y
Published By U.S. Department of Health & Human Services
Issued almost 10 years ago
Summary
Description
The Healthcare Effectiveness Data and Information Set (HEDIS) is a tool used by more than 90 percent of Americas health plans to measure performance on important dimensions of care and service.