504 research outputs found
Phase error and associated cross-polarization effects in cassegrainian-fed microwave antennas
Phase error and cross-polarization effects in Cassegrainian and microwave antenna
Digital computer analysis and design of a subreflector of complex shape
Digital computer technique for computing scattered pattern of complex hyperboloid subreflector in Cassegrain antenna feed system
Applications of two-dimensional integral equation theory to reflector antenna analysis
Applying method of moments to solution of integral equations for current induced on conducting cylinders in two-dimensional fiel
Millimeter-wave radiometry for radio astronomy Final report, Nov. 1965 - 31 Dec. 1967
Noise, gain, and antenna data for millimeter wave radiometers, and lunar eclipse observation
Millimeter-wave radiometry for radio astronomy Final report
Lunation study using millimeter wave radiometry for radio astronom
Symmetrical two dimensional scattering program
Computer program solves integral equation for currents induced by electric or magnetic plane wave incident upon one or more conducting cylinders with a midplane of symmetry. Program utilizes symmetry of the geometry. Restrictions on the program are given
Millimeter-wave radiometry for radio astronomy Final report
Millimeter wave radiometry for radio astronom
Millimeter-wave radiometry for radio astronomy Final report, 1 Aug. 1964 - 15 Sep. 1966
Instrumentation and antenna development, solar observations, and lunation observations in study of millimeter wave radiometry for radio astronom
An integrated genomic analysis of lung cancer reveals loss of DUSP4 in EGFR-mutant tumors.
To address the biological heterogeneity of lung cancer, we studied 199 lung adenocarcinomas by integrating genome-wide data on copy number alterations and gene expression with full annotation for major known somatic mutations in this cancer. This showed non-random patterns of copy number alterations significantly linked to EGFR and KRAS mutation status and to distinct clinical outcomes, and led to the discovery of a striking association of EGFR mutations with underexpression of DUSP4, a gene within a broad region of frequent single-copy loss on 8p. DUSP4 is involved in negative feedback control of EGFR signaling, and we provide functional validation for its role as a growth suppressor in EGFR-mutant lung adenocarcinoma. DUSP4 loss also associates with p16/CDKN2A deletion and defines a distinct clinical subset of lung cancer patients. Another novel observation is that of a reciprocal relationship between EGFR and LKB1 mutations. These results highlight the power of integrated genomics to identify candidate driver genes within recurrent broad regions of copy number alteration and to delineate distinct oncogenetic pathways in genetically complex common epithelial cancers
Structural Test and Analysis of a Hybrid Inflatable Antenna
NASA is developing ultra-lightweight structures technology for communication antennas for space missions. One of the research goals is to evaluate the structural characteristics of inflatable and rigidizable antennas through test and analysis. Being able to test and analyze the structural characteristics of a full scale antenna is important to enable the simulation of various mission scenarios to determine system performance in space. Recent work completed to evaluate a Hybrid Inflatable Antenna concept will be discussed. Tests were completed on a 2-m prototype to optimize its static shape and identify its modal dynamics that are important for analytical model validation. These test results were used to evaluate a preliminary finite element model of the antenna, and this model development and correlation activity is also described in the paper
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