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Articles 91 - 107 of 107
Full-Text Articles in Statistics and Probability
Fabrication Method For Adhesive Pressure Bonding Two Components Together With Closed-Loop Control, Gary B. Hughes, James P. Mcdonald, Arthur V. Schweidler, Lloyd D. Ingle
Fabrication Method For Adhesive Pressure Bonding Two Components Together With Closed-Loop Control, Gary B. Hughes, James P. Mcdonald, Arthur V. Schweidler, Lloyd D. Ingle
Statistics
Two components are bonded together in a bonding apparatus using a bonding medium of malleable metallic spheres and a curable adhesive. The two components are bonded by positioning the components in a facing-but-spaced-apart relation in the bonding apparatus with the spheres and the adhesive between the first component and the second component. The bonding apparatus forces the first component toward the second component with sufficient force to bond the spheres to the first component and to the second component, while monitoring at least one measured bonding reaction of the first component and the second component, and controlling the bonding apparatus …
Latest Tools For Viewing And Quality Checking Arm Data, S. Moore, Gary B. Hughes
Latest Tools For Viewing And Quality Checking Arm Data, S. Moore, Gary B. Hughes
Statistics
The DOE Atmospheric Radiation Measurement (ARM) program has acquired an incredibly large quantity of data over its period of operation, all of which must be reviewed in some manner in order to ensure that the data is of “known and reasonable” quality (ARM Science Plan). To accomplish this, Mission Research Corporation (MRC) coordinates with the ARM Data Quality Office to develop software tools that quality-check data products in a timely and continuous fashion. These tools work with the Data Quality Health and Status (DQ HandS) Explorer (Peppler et al. 2004) by analyzing ARM data streams, providing assessments of data quality …
Comparison Of Features From Sar And Gmti Imagery Of Ground Targets, David Beckman, Samuel J. Frame
Comparison Of Features From Sar And Gmti Imagery Of Ground Targets, David Beckman, Samuel J. Frame
Statistics
We describe an algorithm for class-independent automated target recognition (ATR) and association using range-Doppler images of moving targets and SAR images of stationary targets. This algorithm can be used both for target identification (by comparison against a pre-existing database of measurements of all potential targets) and target association (not requiring a pre-existing database). The algorithm computes a one-dimensional signature for each received range-Doppler image; these signatures are stored in a database for comparison against other detections. The signatures used in our algorithm are range profiles, generated from the clutter-suppressed, filtered image by incoherently integrating the image energy across a number …
Modern Spectral Climate Patterns In Rhythmically Deposited Argillites Of The Gowganda Formation (Early Proterozoic), Southern Ontario, Canada, Gary B. Hughes, Robert Giegengack, Haralambos N. Kritikos
Modern Spectral Climate Patterns In Rhythmically Deposited Argillites Of The Gowganda Formation (Early Proterozoic), Southern Ontario, Canada, Gary B. Hughes, Robert Giegengack, Haralambos N. Kritikos
Statistics
Rhythmically deposited argillites of the Gowganda Formation (ca. 2.0–2.5 Ga) probably formed in a glacial setting. Drop stones and layered sedimentary couplets in the rock presumably indicate formation in a lacustrine environment with repeating freeze–thaw cycles. It is plausible that temporal variations in the thickness of sedimentary layers are related to interannual climatic variability, e.g. average seasonal temperature could have influenced melting and the amount of sediment source material carried to the lake. A sequence of layer couplet thickness measurements was made from high-resolution digitized photographs taken at an outcrop in southern Ontario, Canada. The frequency spectrum of thickness measurements …
Numeric Issues In Test Software Correctness, Robert G. Hayes, Gary B. Hughes, Phillip M. Dorin, Raymond J. Toal
Numeric Issues In Test Software Correctness, Robert G. Hayes, Gary B. Hughes, Phillip M. Dorin, Raymond J. Toal
Statistics
Test system designers are comfortable with the concepts of precision and accuracy with regard to measurements achieved with modern instrumentation. In a well-designed test system, great care is taken to ensure accurate measurements, with rigorous attention to instrument specifications and calibration. However, measurement values are subjected to representation and manipulation as limited precision floating-point numbers by test software. This paper investigates some of the issues related to floating point representation of measurement values, as well as the consequences of algorithm selection. To illustrate, we consider the test case of standard deviation calculations as used in the testing of infrared focal …
Sclerosponges: Potential High-Resolution Recorders Of Marine Paleotemperatures, Gary B. Hughes, Charles W. Thayer
Sclerosponges: Potential High-Resolution Recorders Of Marine Paleotemperatures, Gary B. Hughes, Charles W. Thayer
Statistics
Sclerosponges have great potential as seawater temperature recorders. These animals precipitate their skeletons in carbon and oxygen isotopic equilibrium with the surrounding seawater (Druffel and Benavides, 1986). Their skeletons also display chemical properties that vary directly with changes in environmental conditions. Lack of photosynthetic symbionts allows sclerosponges to live below the photic zone, providing the potential to investigate past marine conditions beyond the range of corals. Individual sponges live for several centuries, preserving archives of pre-and postindustrial seawater variations within single specimens (Hartman and Reiswig, 1980). Cross-correlation of successively older specimens could yield up to 2000 years of marine history. …
Electrical Feedthrough And Its Preparation, Leonard E. Peck, Timothy S. Romano, Tom K. Evans, Gary B. Hughes, Karl H. Neumann
Electrical Feedthrough And Its Preparation, Leonard E. Peck, Timothy S. Romano, Tom K. Evans, Gary B. Hughes, Karl H. Neumann
Statistics
An electrical feedthrough (34) is prepared by furnishing an aluminum oxide feedthrough plate (70) and at least one feedthrough pin (80) having a length greater than the thickness of the feedthrough plate (70). A pin bore (78) is formed through the feedthrough plate (70) for each feedthrough pin (80). Each pin bore (78) has a pin bore (78) size greater than the feedthrough pin (80) size, preferably by an amount no greater than that required to permit the penetration of a brazing metal (88) between the pin bore (78) and the feedthrough pin (80). Each feedthrough pin (80) is inserted …
Extensive Forest Leaf Area Survey Aiming At Detection Of Vegetation Change In Subarctic-Boreal Zone, Tomoko Kusakabe, Hayato Tsuzuki, Gary B. Hughes, Tatsuo Sweda
Extensive Forest Leaf Area Survey Aiming At Detection Of Vegetation Change In Subarctic-Boreal Zone, Tomoko Kusakabe, Hayato Tsuzuki, Gary B. Hughes, Tatsuo Sweda
Statistics
The warming resulting from increasing anthropogenic carbon dioxide and other greenhouse gasses is expected to be most prominent in the subarctic-boreal region of the Northern Hemisphere. With the objective of setting up a baseline to monitor possible vegetation change in this region, a continuous vegetation profile extending 600 km from Edmonton, Alberta to Cluff Lake, Saskatchewan, Canada was measured using an airborne infrared laser altimeter mounted on a helicopter. Then the distribution of leaf area index over the same 600 km long transect was estimated from this vegetation profile based on a series of plot surveys on the ground to …
Spectral Indications Of Unexpected Contributors To Atmospheric Co2 Variability?, Gary B. Hughes, Robert Gigengack, Haralambos N. Kritikos
Spectral Indications Of Unexpected Contributors To Atmospheric Co2 Variability?, Gary B. Hughes, Robert Gigengack, Haralambos N. Kritikos
Statistics
The frequency spectrum of Northern Hemisphere atmospheric CO2 concentration shows strong periodicities at 6.2, 1.0 and 0.5 years. The 6.2 year cyclicity has been attributed to non-linear interactions between the annual cycle and the atmospheric pole tide. The yearly signal is linked to terrestrial photosynthesis; phase analysis shows that annual CO2 minima occur at a lag of approximately 85 days from insolation maxima. Variations in the nominal yearly period occur during times of anomalous anthropogenic CO2 production. Periodicity at 6 months represents a deviation of the yearly signal from an annual sinusoid. If the yearly signal is …
Kriging Puerto Rico Rainfall, Gary B. Hughes
Kriging Puerto Rico Rainfall, Gary B. Hughes
Statistics
In Earth science research, climatic conditions can have significant effects on dynamic processes. For example, the growth of forests is affected by temperature, rainfall and other climatic variables. However, these climate parameters are rarely measured at the forest stands whose growth is being investigated. The climate conditions are measured at nearby weather stations, though, and it is a common approach to use the weather station data to ‘predict’ the climate at the study site
Preparation Of Gold-Coated Molybdenum Articles And Articles Prepared Thereby, Timothy S. Romano, Tom K. Evans, Gary B. Hughes, Karl H. Neumann
Preparation Of Gold-Coated Molybdenum Articles And Articles Prepared Thereby, Timothy S. Romano, Tom K. Evans, Gary B. Hughes, Karl H. Neumann
Statistics
A gold-coated molybdenum article (30) is made by furnishing a substrate (32) made of pure molybdenum or an alloy of molybdenum, and preparing a slurry of gold powder, acrylic binder, and acetone liquid carrier. The slurry is applied to a portion of a surface of the substrate. The substrate with applied slurry is heated in vacuum or inert atmosphere to an elevated temperature, preferably about 2040.degree. F., and thereafter cooled to ambient temperature. The result is an article (30) having at least a portion of the substrate (32) covered with an adherent gold coating (34).
Semi-Permanent Vacuum Closure With Multiple Retubulation Capability, Arthur A. Eneim, Tom K. Evans, Timothy S. Romano, Gary B. Hughes
Semi-Permanent Vacuum Closure With Multiple Retubulation Capability, Arthur A. Eneim, Tom K. Evans, Timothy S. Romano, Gary B. Hughes
Statistics
A vacuum system (20) includes an enclosure (22) having a vacuum-tight wall (26) and an internally threaded aperture (66) through the wall (26). A tip-off fitting (24) has a base (50) with a bore (52) therethrough, a hollow tube (62) fixed to the base (50) with a vacuum-tight seal, such that an interior (64) of the tube (62) is in communication with the bore (52) in the base (50), and an external thread (58) on the exterior of the base (50). The external thread (58) on the exterior of the base (50) is dimensioned to threadably engage the internal thread …
Brazed Lower Vacuum Housing For A Dewar, Timothy S. Romano, Tom K. Evans, Gary B. Hughes, Karl H. Neumann
Brazed Lower Vacuum Housing For A Dewar, Timothy S. Romano, Tom K. Evans, Gary B. Hughes, Karl H. Neumann
Statistics
A lower vacuum housing (34) of a sensor dewar (26) is fabricated in a single brazing operation from ceramic and metallic components. The components are assembled with ceramic-to-metal interfaces and metal-to-metal interfaces. Brazing is accomplished by active brazing of the ceramic-to-metal interfaces and non-active brazing of the metal-to-metal interfaces. Specific combinations of active braze alloys and non-active braze alloys are provided for various combinations of dewar materials.
Feedthrough Pin And Process For Its Preparation, And Electrical Feedthrough Made Therewith, Timothy S. Romano, Tom K. Evans, Gary B. Hughes, Karl H. Neumann
Feedthrough Pin And Process For Its Preparation, And Electrical Feedthrough Made Therewith, Timothy S. Romano, Tom K. Evans, Gary B. Hughes, Karl H. Neumann
Statistics
A feedthrough (34) is formed of a feedthrough plate (44) having at least one bore (46) therethrough and a feedthrough pin (48) hermetically sealed into the bore (46). The feedthrough pin (48) includes an elongated pin (50) having an axis of elongation (52), a recess (54) in at least one end of the pin (50), the recess (54) extending parallel to the axis of elongation (52), and a gold coating (56) within the recess (54). There are preferably a plurality of bores (46) in the feedthrough plate (48) and a corresponding plurality of the feedthrough pins (48). The gold coatings …
An Empirical Bayes Approach To Polynomial Regression Under Order Restrictions, Leonard W. Deaton
An Empirical Bayes Approach To Polynomial Regression Under Order Restrictions, Leonard W. Deaton
Statistics
An unknown polynomial is to be estimated over a finite interval from N independent, normally distributed observations. A prior distribution is placed on the polynomial coefficients expressing the opinion that the coefficients decrease in absolute value as the degree of the corresponding terms increase. The data are used to estimate the parameters in the prior distribution of the coefficients. A Monte Carlo study is presented which compares the proposed method with the lack-of-fit procedure. This study indicates that the proposed method performs well in terms of minimizing a squared error loss as well as in yielding the correct degree of …
A Prior Distribution For Smooth Regression, Leonard W. Deaton
A Prior Distribution For Smooth Regression, Leonard W. Deaton
Statistics
No abstract provided.
An Example On Maximum Likelihood Estimates, Leonard W. Deaton
An Example On Maximum Likelihood Estimates, Leonard W. Deaton
Statistics
No abstract provided.