World Library  


Algebra


Algebra is the branch of mathematics concerning the study of the rules of operations and relations, and the constructions and concepts arising from them, including terms, polynomials, equations and algebraic structures. Together with geometry, analysis, topology, combinatorics, and number theory, algebra is one of the main branches of pure mathematics.

 
  • Cover Image

Diffusional and Accretional Growth of Water Drops in a Rising Adia...

By: L.-p. Wang; W. W. Grabowski

Description: Mesoscale and Microscale Meteorology Division, National Center for Atmospheric Research, Boulder, CO 80307, USA. A large set of rising adiabatic parcel simulations is executed to investigate the combined diffusional and accretional growth of cloud droplets in maritime and continental conditions, and to assess the impact of enhanced droplet collisions due to small-scale cloud turbulence. The microphysical model applies the droplet number density function...

Ayala, O., Rosa, B., Wang, L.-P., and Grabowski, W. W.: Effects of turbulence on the geometric collision rate of sedimenting droplets: Part 1. Results from direct numerical simulation, New J. Phys., 10, 075015, doi:10.1088/1367-2630/10/7/075015, 2008a.; Ayala, A., Rosa, B., and Wang, L.-P.: Effects of turbulence on the geometric collision rate of sedimenting droplets: Part 2. Theory and parameterization, New J. Phys., 10, 075016, doi:10.1088/1367-2630/10/7/075016, 2008b....

Read More
  • Cover Image

Optical Properties of Pristine Ice Crystals in Mid-latitude Cirrus...

By: G. Mioche; V. Shcherbakov; C. Gourbeyre; A. Minikin; J.-f. Gayet; R. Busen

Description: Laboratoire de Météorologie Physique, UMR 6016 CNRS/Université Blaise Pascal, France. Preferential horizontally-oriented ice crystals with a prevalent hexagonal-plate shape revealed by the Cloud Particle Imager can explain systematic larger Lidar CALIOP extinctions when compared with extinction derived from co-located in situ measurements. Surprisingly, the Polar Nephelometer does not reveal any signature of 22° (and 46°) halos, showing a rather feature...

Auriol, F., Gayet, J.-F., Febvre, G., Jourdan, O., Labonnote, L., and Brogniez, G.: In situ observations of cirrus cloud scattering phase function with 22° and 46° halos: Cloud field study on 19 February 1998, J. Atmos. Sci., 58, 3376–3390, 2001.; Baran, A. J.: On the scattering and absorption properties of cirrus cloud, J. Quant. Spect. Rad. Tran., 89, 17–36, 2004.; Baran, A. J. and Labonnote, L.-C.: A self-consistent scattering model for cirrus. I: The solar region, Q....

Read More
  • Cover Image

The Breakup of Levitating Water Drops Observed with a High Speed C...

By: P. J. Connolly; C. Emersic

Description: School of Earth, Atmospheric and Environmental Sciences, The University of Manchester, Manchester, UK. A wind tunnel was used to interact water drops and were recorded using a high speed camera. Three distinct collisional breakup types were observed and the drop size spectra from each were analysed for comparison with parameterisations constructed by Low and List (1982a). The spectra predicted by the parameterisations did not accurately correlate with th...

Bott, A.: A flux method for the numerical solution of the stochastic collection equation, J. Atmos. Sci., 55, 2284–2293, 1998.; Barros, A. P., Prat, O. P., Shrestha, P., Testik, F. Y., and Bliven, L. F.: Revisiting Low and List (1982): Evaluation of Raindrop Collision Parameterizations Using Laboratory Observations and Modeling, J. Atmos. Sci., 65, 2983–2993, doi:10.1175/2008JAS2630.1, 2008.; Beard, K. V., Johnson, D. B...

Read More
  • Cover Image

Diffusional and Accretional Growth of Water Drops in a Rising Adia...

By: L.-p. Wang; W. W. Grabowski

Description: Mesoscale and Microscale Meteorology Division, National Center for Atmospheric Research, Boulder, CO 80307, USA. A large set of rising adiabatic parcel simulations is executed to investigate the combined diffusional and accretional growth of cloud droplets in maritime and continental conditions, and to assess the impact of enhanced droplet collisions due to small-scale cloud turbulence. The microphysical model applies the droplet number density function...

Ayala, O., Rosa, B., Wang, L.-P., and Grabowski, W. W.: Effects of turbulence on the geometric collision rate of sedimenting droplets: Part 1. Results from direct numerical simulation, New J. Physics, in press, 2008a.; Ayala, A., Rosa, B., and Wang, L.-P.: Effects of turbulence on the geometric collision rate of sedimenting droplets: Part 2. Theory and parameterization, New J. Physics, in press, 2008b.; Beard, K. V.: Terminal velocity and shape of cloud and precipitation...

Read More
  • Cover Image

A New Thermal Gradient Ice Nucleation Diffusion Chamber Instrument...

By: S. Dobbie; J. B. McQuaid; G. Kulkarni

Description: School of Earth and Environment, University of Leeds, Leeds, UK. A new Thermal Gradient ice nucleation Diffusion Chamber (TGDC) capable of investigating ice nucleation efficiency of atmospherically important aerosols, termed Ice Nuclei (IN), has been designed, constructed and validated. The TGDC can produce a range of supersaturations with respect to ice (SSi) over the temperature range of −10 to −34°C for sufficiently long time needed...

Vali, G.: Nucleation Terminology, B. Am. Meteor. Soc., 66, 1426–1427, 1985.; Bailey, M. and Hallett, J.: Nucleation effects on the habit of vapour grown ice crystals from −18 to −42°C, Q. J. Roy. Meteor. Soc., 128, 1461–1483, 2002.; Baker, M. B.: Cloud microphysics and climate, Science, 276, 1072–1078, 1997.; Braban, C. F., Cziczo, D. J., and Abbatt, J. P. D.: Deliquescence of ammonium sulfate particles at sub-eutectic temperatures, Geophys. Res. Lett., 28(20), 3879–3882...

Read More
  • Cover Image

Numerical Simulation of Bore Generation and Morphology in Thermal ...

By: D. C. Fritts; J. Werne; B. Laughman

Description: NorthWest Research Associates, CoRA Division, Boulder, CO, USA. We perform a series of numerical simulations employing a model describing nonlinear incompressible dynamics to explore bore generation and morphology for several ducting geometries. These include idealized thermal ducts in close proximity to, and more remote from, reflecting boundaries, an idealized Doppler duct remote from boundaries, and a combination of thermal and Doppler ducts at nearb...

Hecht, J. H., Walterscheid, R. L., Hickey, M. P., and Franke, S. J.: Climatology and modeling of quasi-monochromatic atmospheric gravity waves observed over Urbana, Illinois, J. Geophys. Res., 106(D6), 5181–5195, 2001.; Isler, J. R., Taylor, M. J., and Fritts, D. C.: Observational Evidence of Wave Ducting and Evanescence in the Mesosphere, J. Geophys. Res., 102, 26301–26313, 1997.; Koop, C. G. and Butler, G.: An investigation of internal solitary waves in a two-fluid sys...

Read More
  • Cover Image

Removal of Paraquat Pesticide with Fenton Reaction in a Pilot Scal...

By: C. Oliveira; A. Alves; L. M. Madeira; T. Juhna; K. Tihomirova; K. Gruskevica

Description: LEPAE – Laboratory for Process, Environmental and Energy Engineering, Department of Chemical Engineering, Faculty of Engineering, University of Porto, R. Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal. Advanced oxidation processes, such as the Fenton's reagent, are powerful methods for decontamination of different environments from recalcitrant organics. In this work it was studied the degradation of paraquat pesticide (employing the commercial product ...

Andreozzi, R., Caprio, V., Insola, A., and Marotta, R. L.: Advanced oxidation processes (AOP) for water purification and recovery, Catal. Today, 53, 51–59, 1999.; Bautitz, I. R. and Nogueira, R. F. L.: Degradation of tetracycline by photo-Fenton process – Solar irradiation and matrix effects, J. Photoch. Photobio. A, 187, 33-39, 2007.; Duarte, F., Maldonado-Hódar, F. J., Pérez-Cadenas, A. F., and Madeira, L. M.: Fenton-like degradation of azo-dye Orange II catalyzed by t...

Read More
  • Cover Image

Short Communication: Topotoolbox 2 – Matlab-based Software for Top...

By: D. Scherler; W. Schwanghart

Description: Geohazards, University of Potsdam, Institute of Earth and Environmental Science, Karl-Liebknecht-Str. 24–25, 14476 Potsdam-Golm, Germany. TopoToolbox is a MATLAB program for the analysis of digital elevation models (DEMs). With the release of version 2, the software adopts an object-oriented programming (OOP) approach to work with gridded DEMs and derived data such as flow directions and stream networks. The introduction of a novel technique to store flo...

Fagherazzi, S., Howard, A. D., and Wiberg, P. L.: An implicit finite difference method for drainage basin evolution. Water Resour. Res., 38, 21.1–21.5, 2002.; Arge, L., Chase, J. S., Halpin, P., Toma, L., Vitter, J. S., Urban, D., and Wickremesinghe, R.: Efficient flow computation on massive grid terrain datasets, GeoInformatica, Springer Netherlands, 7, 283–313, 2003.; Borghi, A., Renard, P., and Jenni, S.: A pseudo-genetic stochastic model to generate karstic networks,...

Read More
  • Cover Image

Modeling the Snow Surface Temperature with a One-layer Energy Bala...

By: C. H. Luce; D. G. Tarboton; J. You

Description: School of Natural Resources, University of Nebraska – Lincoln, Lincoln, Nebraska 68583, USA. Snow surface temperature is a key control on and result of dynamically coupled energy exchanges at the snow surface. The snow surface temperature is the result of the balance between external forcing (incoming radiation) and energy exchanges above the surface that depend on surface temperature (outgoing longwave radiation and turbulent fluxes) and the transport o...

Anderson, E. A.: A Point Energy and Mass Balance Model of a Snow Cover. NOAA Technical Report NWS 19, US Department of Commerce, 150 pp., 1976.; Berg, P. W, and McGregor, J. L.: Elementary Partial Differential Equations, Holden-Day, Oakland, 1966.; Blöschl, G. and Kirnbauer, R.: Point snowmelt models with different degrees of complexity – internal processes, J. Hydrol., 129, 127–147, 1991.; Bras, R. L.: Hydrology, an Introduction to Hydrologic Science, Addison-Wesley: Re...

Read More
  • Cover Image

Screening of Sustainable Groundwater Sources for Integration Into ...

By: T. Y. Stigter; M. C. Cunha; L. Ribeiro; J. Nascimento; L. M. Nunes; J. Vieira; J. P. Monteiro; H. Lucas

Description: Geo-Systems Centre/CVRM, Instituto Superior Técnico, Lisbon, Portugal. This paper reports on the qualitative and quantitative screening of groundwater sources for integration into the public water supply system of the Algarve, Portugal. The results are employed in a decision support system currently under development for an integrated water resources management scheme in the region. Such a scheme is crucial for several reasons, including ...

Addiscott,~T.: Perspective – is it nitrate that threatens life or the scare about nitrate?, J. Sci. Food Agr., 86, 2005–2009, 2006.; Alley,~W M. and Leake,~S A.: The journey from safe yield to sustainability, Ground Water, 42, 12–16, 2004.; Almeida,~C.: Hidrogeologia do Algarve Central, Ph.D., Univ. de Lisboa, Lisbon, 1985.; Almeida,~C., Mendonça,~J J L., Jesus,~M R., and Gomes,~A J.: Sistemas aquíferos de Portugal Continental, Rep. INAG, Lisbon, Portugal, 2000.; Backman...

Read More
  • Cover Image

A Hybrid Least Squares Support Vector MacHines and Gmdh Approach f...

By: A. Shabri; P. Saad; R. Samsudin

Description: Faculty of Computer Science and Information System, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia. This paper proposes a novel hybrid forecasting model, which combines the group method of data handling (GMDH) and the least squares support vector machine (LSSVM), known as GLSSVM. The GMDH is used to determine the useful input variables for LSSVM model and the LSSVM model which works as time series forecasting. In this study the application...

Abraham, A. and Nath, B.: Hybrid intelligent systems de-sign – A review of a decade of research, Technical Report (5/2000), Gippsland School of Computing and Information Technology, Monash University, Australia, 2001.; Abraham, A. and Nath, B.: A neuro-fuzzy approach for modeling electricity demand in Victoria, Appl. Soft Comput., 1(2), 127–138, 2001.; Affandi, A. K. and Watanabe, K.: Daily groundwater level fluctuation forecasting using soft computing technique, Nature ...

Read More
  • Cover Image

A Model for Aperiodicity in Earthquakes : Volume 15, Issue 1 (07/0...

By: D. Lavallée; B. Birnir; B. Erickson

Description: Department of Mathematics, University of California, Santa Barbara, USA. Conditions under which a single oscillator model coupled with Dieterich-Ruina's rate and state dependent friction exhibits chaotic dynamics is studied. Properties of spring-block models are discussed. The parameter values of the system are explored and the corresponding numerical solutions presented. Bifurcation analysis is performed to determine the bifurcations and stability of s...

Andrews, D. J.: Rupture velocity of plane strain shear cracks, J. Geophys. Res., 81, 5679–5687, 1976.; Ascher, U. M. and Petzold, L. R.: Computer methods for ordinary differential equations and differential-algebraic equations, SIAM, Philadelphia, 1st edition, 1998.; Archuleta, R. J.: A faulting model for the 1979 Imperial Valley earthquake, J. Geophys. Res., 89, 4559–4586, 1984. %; %Archuleta, R. J.: %Personal communication, ralph@crustal.ucsb.edu, %2007.; Bak, P., Tang...

Read More
  • Cover Image

Statistical Inference from Atmospheric Time Series: Detecting Tren...

By: A. Gluhovsky

Description: Department of Earth and Atmospheric Sciences and Department of Statistics, Purdue University, West Lafayette, IN 47907, USA. Standard statistical methods involve strong assumptions that are rarely met in real data, whereas resampling methods permit obtaining valid inference without making questionable assumptions about the data generating mechanism. Among these methods, subsampling works under the weakest assumptions, which makes it particularly applicab...

Cleveland, W. S. and Devlin, S. J.: Locally-Weighted Regression: an Approach to Regression Analysis by Local Fitting, J. Amer. Stat. Assoc., 83, 597–610, 1988.; Agee, E. M.: Mesoscale cellular convection over the oceans, Dyn. Atmos. Oceans, 10, 317–341, 1987.; Ashley, R. A. and Patterson, D. M.: Apparent long memory in time series as an artifact of a time-varying mean: considering alternatives to the fractionally integrated model, Macroecon. Dyn., 14, 59-�87, 2010.; Bera...

Read More
  • Cover Image

Momentum and Buoyancy Transfer in Atmospheric Turbulent Boundary L...

By: S. S. Zilitinkevich; E. V. Ezhova; Yu. I. Troitskaya

Description: Institute of Applied Physics RAS, Nizhniy Novgorod, Russia. The surface-drag and mass-transfer coefficients are determined within a self-consistent problem of wave-induced perturbations and mean fields of velocity and density in the air, using a quasi-linear model based on the Reynolds equations with down-gradient turbulence closure. Investigation of a harmonic wave propagating along the wind has disclosed that the surface drag is generally larger for s...

Batchelor, G. K.: On steady laminar flow with closed streamlines at large Reynolds number, J. Fluid Mech., 1, 177–190, 1956.; Batchelor, G. K.: An Introduction to Fluid Dynamics, Cambridge University Press, Cambridge, UK, 1967.; Brut, A., Butet, A., Durand, P., Caniaux, G., and Planton, S.: Air-sea exchanges in the equatorial area from the EQUALANT99 dataset: Bulk parametrizations of turbulent fluxes corrected for airflow distortion, Q. J. Roy. Meteor. Soc., 131, 2497–25...

Read More
  • Cover Image

The American Whig Review : Volume 0010, Issue 21 Sept 1849: Americ...

By: Wiley and Putnam

Description: The American Whig Review was a monthly Whig journal of politics, literature, art, and science. It was published in the mid-19th century in New York by Wiley and Putnam.

Read More
  • Cover Image

The United States Democratic Review : Volume 0011, Issue 50 August...

By: J. and H. G. Langley

Description:The United States Magazine and Democratic Review was also (perhaps even primarily) a literary magazine, promoting the development of American literature

Read More
  • Cover Image

School Math and Math Education Programs in the History of the 19Th...

By: Rusudan Gogiberidze
Read More
  • Cover Image

Techniques for Analyses of Trends in Gruan Data : Volume 8, Issue ...

By: G. E. Bodeker; S. Kremser

Description: Bodeker Scientific, 42 Russell Street, Alexandra, New Zealand. The Global Climate Observing System (GCOS) Reference Upper Air Network (GRUAN) provides reference quality RS92 radiosonde measurements of temperature, pressure and humidity. A key attribute of reference quality measurements, and hence GRUAN data, is that each datum has a well characterized and traceable estimate of the measurement uncertainty. The long-term homogeneity of the measurement rec...

Austin, J., Tourpali, K., Rozanov, E., Akiyoshi, H., Bekki, S., Bodeker, G.E., Brühl, C., Butchart, N., Chipperfield, M., Deushi, M., Fomichev, V.I., Giorgetta, M.A., Gray, L., Kodera, K., Lott, F., Manzini, E., Marsh, D., Matthes, K., Nagashima, T., Shibata, K., Stolarski, R.S., Struthers, H., and Tian, W.: Coupled chemistry climate model simulations of the solar cycle in ozone and temperature, J. Geophys. Res., 113, D11306,

Read More
  • Cover Image

Techniques for Analyses of Trends in Gruan Data : Volume 7, Issue ...

By: G. E. Bodeker; S. Kremser

Description: Bodeker Scientific, Alexandra, New Zealand. The Global Climate Observing System (GCOS) Reference Upper Air Network (GRUAN) provides reference quality RS92 radiosonde measurements of temperature, pressure and humidity. A key attribute of reference quality measurements, and hence GRUAN data, is that each datum has a well characterised and traceable estimate of the measurement uncertainty. The long-term homogeneity of the measurement records, and th...

Austin, J., Tourpali, K., Rozanov, E., Akiyoshi, H., Bekki, S., Bodeker, G. E., Brühl, C., Butchart, N., Chipperfield, M., Deushi, M., Fomichev, V. I., Giorgetta, M. A., Gray, L., Kodera, K., Lott, F., Manzini, E., Marsh, D., Matthes, K., Nagashima, T., Shibata, K., Stolarski, R. S., Struthers, H., and Tian, W.: Coupled chemistry climate model simulations of the solar cycle in ozone and temperature, J. Geophys. Res., 113, D11306, doi:

Read More
  • Cover Image

Famous, Faster: Using Parallel Computing Techniques to Accelerate...

By: A. Beurivé; O. Boucher; L. Steels; F. Laguzet; P. Hanappe; N. Bellouin; M. Allen; Y. H. Yamazaki; T. Aina

Description: Sony Computer Science Laboratory, Paris, France. We have optimised the atmospheric radiation algorithm of the FAMOUS climate model on several hardware platforms. The optimisation involved translating the Fortran code to C and restructuring the algorithm around the computation of a single air column. Instead of the existing MPI-based domain decomposition, we used a task queue and a thread pool to schedule the computation of individual columns on t...

Asanovic, K., Bodik, R., Demmel, J., Keaveny, T., Keutzer, K., Kubiatowicz, J., Morgan, N., Patterson, D., Sen, K., Wawrzynek, J., Wessel, D., and Yelick, K.: A view of the parallel computing landscape, Communications of the ACM, 52, 56–67, doi:10.1145/1562764.1562783, 2009.; Backus, J.: Can Programming Be Liberated from the von Neumann Style? A Functional Style and Its Algebra of Programs, Communications of the ACM, ...

Read More
 
311
|
312
|
313
|
314
|
315
Records: 6241 - 6260 of 6,325 - Pages: 



Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.