National Center For Geographic Information And Analysis

suggests that the stage of National Capitalism, which has prevailed since the mid-19th century, is n...

suggests that the stage of National Capitalism, which has prevailed since the mid-19th century, is n...

suggests that the stage of National Capitalism, which has prevailed since the mid-19th century, is n...

suggests that the stage of National Capitalism, which has prevailed since the mid-19th century, is n...

suggests that the stage of National Capitalism, which has prevailed since the mid-19th century, is n...

suggests that the stage of National Capitalism, which has prevailed since the mid-19th century, is n...

suggests that the stage of National Capitalism, which has prevailed since the mid-19th century, is n...

suggests that the stage of National Capitalism, which has prevailed since the mid-19th century, is n...

suggests that the stage of National Capitalism, which has prevailed since the mid-19th century, is n...

suggests that the stage of National Capitalism, which has prevailed since the mid-19th century, is n...

National Convention Center or National Convention Centre may...

The Amarillo National Center is a 10,000-seat multi-purpose ...

The National Empowerment Center (NEC) is an advocacy and pee...

The National Center for Appropriate Technology (NCAT) is an ...

The National Gang Center is a coordinated project of three f...

Abstract As an integral part of the Integrated Ocean Observation System (IOOS) "National Backbone", the National Oceanic and Atmospheric Administration (NOAA) National Data Buoy Center (NDBC) is increasing the oceanographic capabilities of the NDBC Ocean Observing System (NOOS). The goal of the effort, known as Conversion of Weather Buoys (ConWxB), is to increase the number of ocean instruments on existing backbone buoys. The nascent IOOS regional associations were asked to provide suggestions of existing NDBC buoy locations to add directional...

Abstract As an integral part of the Integrated Ocean Observation System (IOOS) "National Backbone", the National Oceanic and Atmospheric Administration (NOAA) National Data Buoy Center (NDBC) is increasing the oceanographic capabilities of the NDBC Ocean Observing System (NOOS). The goal of the effort, known as Conversion of Weather Buoys (ConWxB), is to increase the number of ocean instruments on existing backbone buoys. The nascent IOOS regional associations were asked to provide suggestions of existing NDBC buoy locations to add directional...

Pneumocystis carinii pneumonia (PCP) is the most common opportunistic infection in children who have acquired immunodeficiency syndrome (AIDS). Despite the publication of guidelines for prophylaxis against PCP for children infected with human immunodeficiency virus (HIV) in 1991 (1), ongoing AIDS surveillance has detected no substantial decrease in PCP incidence among HIV-infected infants. Studies indicate that this continued incidence is associated with failure to identify HIV-infected children before PCP occurs and with limitations in the abi...

Abstract The sp3 tight-binding model and the gradient approximation are, respectively, used to calculate electronic states and the loss function of finite carbon nanotubes. The study results show that the loss spectra of finite carbon nanotubes are strongly dependent on the nanotube geometric structure (length, radius, and chiral angle) and the magnetic flux. The prominent peaks at ??4?0 (?0 is the nearest-neighbor overlap integral) mainly result from the ? states, while the peaks at ??4?0 result from the ?+? states. For ??4?0, most loss spect...

Abstract The sp3 tight-binding model and the gradient approximation are, respectively, used to calculate electronic states and the loss function of finite carbon nanotubes. The study results show that the loss spectra of finite carbon nanotubes are strongly dependent on the nanotube geometric structure (length, radius, and chiral angle) and the magnetic flux. The prominent peaks at ??4?0 (?0 is the nearest-neighbor overlap integral) mainly result from the ? states, while the peaks at ??4?0 result from the ?+? states. For ??4?0, most loss spect...

Abstract The electrical characteristics of Nd0.7Ca0.3MnO3 were investigated by measuring voltage versus current (V-I) at various temperatures. The V-I curves of the Nd0.7Ca0.3MnO3 sample change from linear to nonlinear behavior at temperatures below the charge ordering (CO) temperature (TCO~200 K). An unexpected and reproducible electrical hysteresis loop is observed in the linear region below the Curie temperature (TC~110 K); it is associated with the “tearing” of a two-domain structure of weak and strong CO state. The required current for th...

Abstract Buoy moorings used by the National Data Buoy Center (NDBC) have varied from all-synthetic to all-chain moorings. In each case, the mooring is custom designed for each site, but uses off-the-shelf components and a "standard" design philosophy. The NDBC numerical models are used to size the mooring components and segments, given a general design. The NDBC mooring design philosophy has evolved over the past decade by adapting to the various hazards and failures encountered by NDBC, the U.S. Coast Guard, and other users of moored buoys. H...

Abstract Buoy moorings used by the National Data Buoy Center (NDBC) have varied from all-synthetic to all-chain moorings. In each case, the mooring is custom designed for each site, but uses off-the-shelf components and a "standard" design philosophy. The NDBC numerical models are used to size the mooring components and segments, given a general design. The NDBC mooring design philosophy has evolved over the past decade by adapting to the various hazards and failures encountered by NDBC, the U.S. Coast Guard, and other users of moored buoys. H...

Abstract Buoy moorings used by the National Data Buoy Center (NDBC) have varied from all-synthetic to all-chain moorings. In each case, the mooring is custom designed for each site, but uses off-the-shelf components and a "standard" design philosophy. The NDBC numerical models are used to size the mooring components and segments, given a general design. The NDBC mooring design philosophy has evolved over the past decade by adapting to the various hazards and failures encountered by NDBC, the U.S. Coast Guard, and other users of moored buoys. H...

Abstract Not Available

Abstract Not Available

Abstract GaN Schottky barrier photodetectors with SiN/GaN nucleation layer were fabricated. It was found that leakage current was much smaller and much less bias dependent for the photodetector with SiN/GaN nucleation layer, as compared to the photodetector with conventional low-temperature GaN nucleation layer. It was also found that effective Schottky barrier height increased from 1.27 to 1.53 eV with the insertion of the SiN layer. Furthermore, it was found that the authors can effectively suppress internal gain of the detector and enhance ...