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Modern Regression


In statistics, regression analysis includes any techniques for modelling and analyzing several variables, when the focus is on the relationship between a dependent variable and one or more independent variables. More specifically, regression analysis helps us understand how the typical value of the dependent variable changes when any one of the independent variables is varied, while the other independent variables are held fixed.

 
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Small Impact of Surrounding Oceanic Conditions on 2007–2012 Greenl...

By: W. J. Van De Berg; M. R. Van Den Broeke; M. Erpicum; X. Fettweis; B. Noël

Description: Department of Geography, University of Liège, Belgium. During recent summers (2007–2012), several surface melt records were broken over the Greenland Ice Sheet (GrIS). The extreme summer melt resulted in part from a persistent negative phase of the North-Atlantic Oscillation (NAO), favouring warmer than normal conditions over the GrIS. In addition, it has been suggested that significant anomalies in sea ice cover (SIC) and sea surface temperature (SST)...

Bamber, J. L., Ekholm, S., and Krabill, W. B.: A new, high-resolution digital elevation model of Greenland fully validated with airborne laser altimeter data, J. Geophys. Res., 106, 6733–6745, doi:10.1029/2000JB900365, 2001.; Bamber, J. L., Griggs, J. A., Hurkmans, R. T. W. L., Dowdeswell, J. A., Gogineni, S. P., Howat, I., Mouginot, J., Paden, J., Palmer, S., Rignot, E., and Steinhage, D.: A new bed elevation dataset fo...

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Drifting Snow Measurements on the Greenland Ice Sheet and Their Ap...

By: K. Nishimura; M. R. Van Den Broeke; C. J. P. P. Smeets; M. Eijkelboom; J. T. M. Lenaerts; W. Boot; W. J. Van De Berg

Description: Institute for Marine and Atmospheric Research Utrecht, Utrecht University, Utrecht, the Netherlands. This paper presents autonomous drifting snow observations performed on the Greenland Ice Sheet in the fall of 2012. High-frequency Snow Particle Counter (SPC) observations at ~1 m above the surface provided drifting snow number fluxes and size distributions; these were combined with meteorological observations at six levels. We identify two types of...

Bintanja, R.: Snowdrift suspension and atmospheric turbulence, Part 1: Theoretical background and model description, Bound.-Lay. Meteorol., 95, 343–368, 2000.%in list; Bougamont, M., Bamber, J. L., and Greuell, W.: A surface mass balance model for the Greenland Ice Sheet, J. Geophys. Res., 110, F04018, doi:10.1029/2005JF000348, 2005.%in list; Budd, W. F., Dingle, W. R. J., and Radok, U.: The B}yrd Snowdrift Project: Outl...

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Assessing Spatio-temporal Variability and Trends (2000–2013) of Mo...

By: X. Fettweis; M. Tedesco; M. R. Van Den Broeke; R. S. W. Van De Wal; C. J. P. P. Smeets; P. M. Alexander

Description: Graduate Center of the City University of New York, 365 5th Ave., New York, NY, 10016, USA. Accurate measurements and simulations of Greenland Ice Sheet (GrIS) surface albedo are essential, given the crucial role of surface albedo in modulating the amount of absorbed solar radiation and meltwater production. In this study, we assess the spatio-temporal variability of GrIS albedo (during June, July, and August) for the period 2000–2013. We use two r...

Bamber, J. L., Ekholm, S., and Krabill, W. B.: A new, high-resolution digital elevation model of Greenland fully validated with airborne laser altimeter data, J. Geophys. Res., 106, B4, 6733–6745, 2001.; Bamber, J. L., Griggs, J. A., Hurkmans, R. T. W. L., Dowdeswell, J. A., Gogineni, S. P., Howat, I., Mouginot, J., Paden, J., Palmer, S., Rignot, E., and Steinhage, D.: A new bed elevation dataset for Greenland, The Cryosphere, 7, 499–510,

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Projected Changes of Snow Conditions and Avalanche Activity in a W...

By: Y. Durand; N. Eckert; G. Giraud; S. Morin; H. Castebrunet

Description: INSA de Lyon, Laboratoire LGCIE, 20 Avenue des Arts, Bât. J.C.A. Coulomb, 69621 Villeurbanne, France. Projecting changes in snow cover due to climate warming is important for many societal issues, including adaptation of avalanche risk mitigation strategies. Efficient modeling of future snow cover requires high resolution to properly resolve the topography. Here, we detail results obtained through statistical downscaling techniques allowing simulat...

Ammann, W. and Bebi, P.: Der Lawinenwinter 1999, Ereignisanalyse, SLF Davos Bibliothek, 588 pp., 2000.; Ancey, C., Gervasoni, C., and Meunier, M.: Computing extreme avalanches, Cold Reg. Sci. Technol., 39, 161–184, 2004.%in list; Bavay, M., Lehning, M., Jonas, T., and Loewe, H.: Simulations of future snow cover and discharge in Alpine headwaters catchments, Hydrol. Process., 23, 95–108, 2009.%in list; Beniston, M.: Variations of snow depth and duration in the Swiss Alps ...

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Comparison of Aeolian Snow Transport Events and Snow Mass Fluxes B...

By: F. Naaim-bouvet; H. Gallée; C. Genthon; V. Favier; C. Amory; A. Trouvilliez; H. Bellot; C. Agosta; L. Piard

Description: CNRS, LGGE, UMR5183, 38401 Grenoble, France. The regional climate model MAR including a coupled snow pack/aeolian snow transport parameterisation is compared with aeolian snow mass fluxes at a fine spatial resolution (5 km horizontally and 2 m vertically) and at a fine temporal resolution (30 min) over 1 month in Antarctica. Numerous feedbacks are taken into account in the MAR including the drag partitioning caused by the roughness elements. Wind speed...

Agosta, C., Favier, V., Genthon, C., Gallée, H., Krinner, G., Lenaerts, J. T. M., and van den Broeke, M. R.: A 40-year accumulation dataset for Adélie Land, Antarctica and its application for model validation, Clim. Dynam., 38, 75–86, doi:10.1007/s00382-011-1103-4, 2012.; Andreas, E. L.: A Physically Based Model of the Form Drag Associated with Sastrugi, CRREL Report No CR95-16, NTIS, Springfield, 1995.; Bintanja, R...

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The Relative Contributions of Calving and Surface Ablation to Ice ...

By: R. D. Moore; M. Chernos; M. Koppes

Description: Department of Geography, University of British Columbia, 1984 West Mall, Vancouver, BC, V6T 1Z2, Canada. Bridge Glacier is a lake-terminating glacier in the Coast Mountains of British Columbia and has retreated over 3.55 km since 1972, with the majority of the retreat having occurred since 1991. This retreat is out of proportion to surface melt inferred from regional climate indices, suggesting that it has been driven primarily by calving as the glacier ...

Boyce, E. S., Motyka, R. J., and Truffer, M.: Flotation and retreat of a lake-calving terminus, M}endenhall Glacier, southeast Alaska, {USA, J. Glaciol., 53, 211–224, doi:10.3189/172756507782202928, 2007.; Barry, R. G.: The status of research on glaciers and global glacier recession: a review, Prog. Phys. Geog., 30, 285–306, doi:10.1191/0309133306pp478ra, 2006...

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Snow and Albedo Climate Change Impacts Across the United States No...

By: S. R. Fassnacht; N. B. H. Venable; M. L. Cherry

Description: ESS-Watershed Science, Colorado State University, Fort Collins, Colorado, 80523-1476, USA. In areas with a seasonal snowpack, a warmer climate would cause less snowfall, a shallower snowpack and a change in the timing of snowmelt. Trends in temperature, precipitation (total and as snow), days with precipitation and snow, and winter albedo were investigated over the 60 year period from 1951 to 2010 for 20 meteorological stations across the Northern ...

Boon, S.: Snow ablation energy balance in a dead forest stand, Hydrol. Process., 23, 2600–2610, 2009.; Brown, R. and Mote, P.: The response of Northern Hemisphere snow cover to a changing climate, J. Climate, 22, 2124–2145, 2009.; Brown, R., Bartlett, P., MacKay, M., and Verseghy, D.: Evaluation of snowcover in CLASS for SnowMIP, Atmos. Ocean, 44, 223–238, 2006.; Brun, E., David, P., Sudul, M., and Brunot, G.: A numerical model to simulate snow-cover stratigraphy for ope...

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Intercomparison of Snow Density Measurements: Bias, Precision and ...

By: C. Fierz; N. Rutter; M. Schneebeli; M. Proksch

Description: WSL Institute for Snow and Avalanche Research SLF, Flüelastrasse 11, 7260 Davos Dorf, Switzerland. Density is a fundamental property of porous media such as snow. A wide range of snow properties and physical processes are linked to density, but few studies have addressed the uncertainty in snow density measurements. No study has yet considered the recent advances in snow measurement methods such as micro-computed tomography (CT). During the MicroSn...

Adams, E. and Sato, A.: Model of effective thermal conductivity of a dry snow cover composed of uniform spheres, Ann. Glaciol., 18, 300–304, 1993.; Albert, M.: Modeling heat, mass, and species transport in polar firn, Ann. Glaciol., 23, 138–143, 1996.; Brun, E., Martin, E., Simon, V., Gendre, C., and Coleou, C.: An energy and mass model of snow cover suitable for operational avalanche forecasting, J. Glaciol., 35, 333–342, 1989.; Calonne, N., Flin, F., Morin, S., Lesaffr...

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Executive Branch

By: Government Printing Office

Government Reference Publication

Excerpt: Location Position Title Name of Incumbent Pay Plan Type of Appt. Level, Grade, or Pay Tenure Expires EXECUTIVE OFFICE OF THE PRESIDENT - Continued Elizabeth M. Gore Washington, D.C. Special Assistant for Policy and Legislation ... 15 GS SC Kristen Triggs Do ... Public Affairs Officer ... 14 GS SC Nancy Brandel Do ... Legislative Assistant ... 11 GS SC Brooke B. Livingston Do ... Legislative Analyst ... 7 GS SC Daniel R. Wilson Do ... Public Affairs Specialist .....

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Executive Branch

By: Government Printing Office

Government Reference Publication

Excerpt: EXECUTIVE OFFICE OF THE PRESIDENT - Continued Elizabeth M. Gore Washington, D.C. Special Assistant for Policy and Legislation ... 15 GS SC Kristen Triggs Do ... Public Affairs Officer ... 14 GS SC Nancy Brandel Do ... Legislative Assistant ... 11 GS SC Brooke B. Livingston Do ... Legislative Analyst ... 7 GS SC Daniel R. Wilson Do ... Public Affairs Specialist ... 7 GS SC Vacant Do ... Administrator, Office of Federal Procurement Policy ... III EX PAS John Spoti...

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World Health Organization Publication : Year 2002, A88434 - in Eng...

By: Peter J. Baxter

Medical Reference Publication

EXECUTIVE SUMMARY We have undertaken a vulnerability assessment of the Nyiragongo volcano crisis at Goma for the World Health Organisation (WHO), based on an analysis of the impact of the eruption on January 17/18, 2002. According to volcanologists, this eruption was triggered by tectonic spreading of the Kivu rift causing the ground to fracture and allow lava to flow from ground fissures out of the crater lava lake and possibly from a deeper conduit nearer Goma. At the ...

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Coronal Magnetic Fields Inferred from Ir Wavelength and Comparison...

By: Y. Liu

Description: Yunnan Astronomical Observatory, National Astronomical Observatories, Kunming 650011, China. Spectropolarimetry using IR wavelength of 1075 nm has been proved to be a powerful tool for directly mapping solar coronal magnetic fields including transverse component directions and line-of-sight component intensities. Solar tomography, or stereoscopy based on EUV observations, can supply 3-D information for some magnetic field lines in bright EUV loops. In a...

Brosius, J. W., Davila, J. M., Thomas, R. J., and White, S. M.: Coronal magnetography of a solar active region using coordinated SERTS and VLA observations , Astrophys. J., 488, 488–498, 1997.; Casini, R. and Judge, P. G.: Spectral lines for polarization measurements of the coronal magnetic field. II. consistent treatment of the Stokes vector for magnetic-dipole transitions, Astrophys. J., 522, 524–539, 1999.; Gary, D. E. and Hurford, G. J.: Coronal temperature, density,...

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Size of the Coming Solar Cycle 24 Based on Ohl's Precursor Method,...

By: R. P. Kane

Description: Instituto Nacional de Pesquisas Espacias, INPE C.P. 515, 12201-970 São Jose dos Campos, SP, Brazil. In Ohl's Precursor Method (Ohl, 1966, 1976), the geomagnetic activity during the declining phase of a sunspot cycle is shown to be well correlated with the size (maximum sunspot number Rz(max)) of the next cycle. For solar cycle 24, Kane (2007a) used aa(min)=15.5 (12-month running mean), which occurred during March–May of 2006 and made a prel...

Badalyan, O. G., Obridko, V., and Sykora, N. J.: Brightness of the coronal green line and prediction for activity cycles 23 and 24, Solar Phys., 199, 421–435, 2001.; Brown, G. M. and Williams, W. R.: Some properties of the day-to-day variability of Sq(H), Planet. Space Sci., 17, 455–470, 1969.; Clette, F., Berghmans, D., Vanlommel, P., van der Linden, R. A. M., Koeckelenbergh, A., and Wauters, L.: From the Wolf number to the International Sunspot Index: 25 years of SIDC,...

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Fractal Dimensions of Wildfire Spreading : Volume 21, Issue 4 (07/...

By: S.-p. Li; H.-i. Lee; S.-l. Wang

Description: Institute of Physics, Academia Sinica 128 Sec. 2, Academia Rd., Nankang, Taipei, 11529, Taiwan (ROC). The time series data of 31 wildfires in 2012 in the US were analyzed. The fractal dimensions (FD) of the wildfires during spreading were studied and their geological features were identified. A growth model based on the cellular automata method is proposed here. Numerical study was performed and is shown to give good agreement with the fractal dimensions...

Alexandridis, A., Vakalis, D., Siettos, C. I., and Bafas, G. V.: A cellular automata model for forest fire spread prediction: The case of the wildfire that swept through Spetses Island in 1990, Appl. Math. Comput., 204, 191–201, 2008.; Anderson, D. G., Catchpole, E. A., DeMestre, N. J., and Parkes, E.: Modeling the spread of grass fires, J. Austral. Math. Soc., Series B, 23, 451–466, 1982.; Bak, P., Chen, K., and Tang, C.: A forest-fire model and some thoughts on turbule...

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High-Pressure Calibrafien : A Critical Review

By: D.L Decker

Technical Reference Publication

Introduction: The use of pressure as a parameter in the study of materials was pioneered principally by Professor P. W. Bridgman, who for forty years investigated most of the elements and many other materials using diverse techniques (Bridgman, 1964). By the early 1950's high-pressure phenomena began to attract widespread interest. The following list of the number of papers published in the field of high-pressure research indicates its very rapid growth in the last few years.

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Underground Gas Storages as a Natural Monopoly Regulation

By: Guram Chairman
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Folding Large Orbital Complexes Radio Antennas Kosmosurisistemebis

By: Shota Tserodze
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Freight Cars Repair Logistics

By: Vladimir Abuladze
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Crs Report for Congress Received through the Crs Web Science and T...

By: Marcia S. Smith

Summary: Science and technology have a pervasive influence over a wide range of issues confronting the nation. Decisions on how much federal funding to invest in research and development (R&D), and determining what programs have the highest priority, for example, may have implications for homeland security, new high technology industries, government/private sector cooperation in R&D, and myriad other areas.

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Fallout Prediction as of 1957

By: Orin W. Stopinski

Introduction: Following an atomic explosion a cloud is radioactive particles which adhere to other material, debris from experimental equipment, formed, consisting, in part, of particles such as dust, tower or any other source which may have been near the explosion. It is the problem of the fallout predictor to describe the initial distribution of radioactive particles and to follow these particles in their trajectories to the surface as they are acted upon by the wind field.

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