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Articles 151 - 180 of 2131

Full-Text Articles in Physical Sciences and Mathematics

Ocena Wpływu Rozdzielczości Siatki Obliczeniowej Na Wyniki Modelowania Rozprzestrzeniania Się Zanieczyszczeń W Powietrzu, Mateusz Rzeszutek, Robert Oleniacz, Marian Mazur Oct 2014

Ocena Wpływu Rozdzielczości Siatki Obliczeniowej Na Wyniki Modelowania Rozprzestrzeniania Się Zanieczyszczeń W Powietrzu, Mateusz Rzeszutek, Robert Oleniacz, Marian Mazur

Robert Oleniacz

In this study are presented the results of the assessment of the impact of grid resolution on the results of computational modeling of the dispersion of air pollutants. Calculations were performed using Gaussian, non-stationary puff model CALPUFF. Four different grids resolution were analyzed. Networks were established on the basis of SRTM3 terrain and land cover classes of CLC, 2006. Analysis of results of spatial distribution of concentrations of air pollutants obtained in a regular computing grid was performed using statistical indicators recommended by the U.S. EPA. The study shows the applicability of particular computational grids in the system modeling transport …

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Meteorologiczne Determinanty Jakości Powietrza W Krakowie, Robert Oleniacz, Marek Bogacki, Mateusz Rzeszutek, Agata Kot Oct 2014

Meteorologiczne Determinanty Jakości Powietrza W Krakowie, Robert Oleniacz, Marek Bogacki, Mateusz Rzeszutek, Agata Kot

Robert Oleniacz

Air quality in the Agglomeration of Krakow is determined by many factors, which include, among others, unfavorable location and the resulting meteorological conditions unfavorable for self-cleaning of ambient air. The paper presents a few examples illustrating the impact of selected meteorological factors on some pollutant concentrations in the air in Krakow. Among these, special attention was paid to the ambient air temperature (indirectly influencing the level of air emissions from the municipal sector in the winter season) as well as the wind speed and the mixing layer height. On the basis performed analyzes were to draw conclusions on meteorological restrictions …

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Fuzzy Mathematical Models Of Type-1 And Type-2 For Computing The Parameters And Its Applications, R.W. W. Hndoosh Oct 2014

Fuzzy Mathematical Models Of Type-1 And Type-2 For Computing The Parameters And Its Applications, R.W. W. Hndoosh

R. W. Hndoosh

This work provides mathematical formulas and algorithm in order to calculate the derivatives that being necessary to perform Steepest Descent models to make T1 and T2 FLSs much more accessible to FLS modelers. It provides derivative computations that are applied on different kind of MFs, and some computations which are then clarified for specific MFs. We have learned how to model T1 FLSs when a set of training data is available and provided an application to derive the Steepest Descent models that depend on trigonometric function (SDTFM). This work, also focused on an interval type-2 non-singleton type-2 FLS (IT2 NS-T2 …

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Fuzzy Mathematical Models For The Analysis Of Fuzzy Systems With Application To Liver Disorders, R.W. W. Hndoosh Oct 2014

Fuzzy Mathematical Models For The Analysis Of Fuzzy Systems With Application To Liver Disorders, R.W. W. Hndoosh

R. W. Hndoosh

The main objective of this model is to focus on how to use the model of fuzzy system to solve fuzzy mathematics problems. Some mathematical models based on fuzzy set theory, fuzzy systems and neural network techniques seem very well suited for typical technical problems. We have proposed an extension model of a fuzzy system to N-dimension, using Mamdani's minimum implication, the minimum inference system, and the singleton fuzzifier with the center average defuzzifier. Here construct two different models namely a fuzzy inference system and an adaptive fuzzy system using neural network. We have extended the theorem for accuracy of …

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Awe Outdoor Water Savings Research Initiative, Peter Mayer, Paul Lander, Diana T. Glenn Oct 2014

Awe Outdoor Water Savings Research Initiative, Peter Mayer, Paul Lander, Diana T. Glenn

Diana T. Glenn

A review, analysis, and synthesis of published and pending research on outdoor water use and water savings.

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Estimating Mineral Weathering Rates In Catskills Watersheds, Chris E. Johnson Oct 2014

Estimating Mineral Weathering Rates In Catskills Watersheds, Chris E. Johnson

Chris E Johnson

No abstract provided.

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Ocena Efektów Termomodernizacji Budynków Jednorodzinnych. 1. Zmniejszenie Zużycia Ciepła I Emisji Zanieczyszczeń Do Powietrza, Robert Oleniacz, Magdalena Kasietczuk, Mateusz Rzeszutek Sep 2014

Ocena Efektów Termomodernizacji Budynków Jednorodzinnych. 1. Zmniejszenie Zużycia Ciepła I Emisji Zanieczyszczeń Do Powietrza, Robert Oleniacz, Magdalena Kasietczuk, Mateusz Rzeszutek

Robert Oleniacz

One of the measures allowing to reduce the emissions of pollutants into the air from the housing sector is decrease in the energy demand, which can be most easily achieved by thermal renovations. This paper analyses some possible variants of thermomodernization of a residential building typical for single-family housing construction of the 1970s and 1980s in Poland (replacement of window frames, insulation of external walls, flat roof insulation and all of the above-mentioned measures together with heating system replacement). Each of the considered variants was assessed in respect to the heat demand and emission of basic pollutants into the air. …

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Ocena Efektów Termomodernizacji Budynków Jednorodzinnych. 2. Ograniczenie Wpływu Na Jakość Powietrza Atmosferycznego, Robert Oleniacz, Magdalena Kasietczuk, Mateusz Rzeszutek Sep 2014

Ocena Efektów Termomodernizacji Budynków Jednorodzinnych. 2. Ograniczenie Wpływu Na Jakość Powietrza Atmosferycznego, Robert Oleniacz, Magdalena Kasietczuk, Mateusz Rzeszutek

Robert Oleniacz

The article assesses to what extent reduced the impact on air quality of a complex of detached coal-fired houses as a result of some thermal renovation works which lowered the fuel consumption and reduced emissions of pollutants into the air. The assessment was done on the basis of results of dispersion modelling for selected substances (SO2, NO2, CO, PM10, B(a)P and PCDD/F) in the ambient air with the use of CALMET/CALPUFF models. The calculation process encompassed preparation of the data on spatial features of the area, making a three-dimensional grid of meteorological data, definition of geometrical parameters of substitute emitters …

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The 21st Century Library For Geoscientists, Maxine G. Schmidt Sep 2014

The 21st Century Library For Geoscientists, Maxine G. Schmidt

Maxine G Schmidt

No abstract provided.

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Fuzzy Mathematical Model For Detection Of Lung Cancer Using A Multi-Nfclass With Confusion Fuzzy Matrix For Accuracy, R.W. W. Hndoosh Sep 2014

Fuzzy Mathematical Model For Detection Of Lung Cancer Using A Multi-Nfclass With Confusion Fuzzy Matrix For Accuracy, R.W. W. Hndoosh

R. W. Hndoosh

and detection of lung cancer data. This model depends on a generic model of a fuzzy perceptron, which can be used to derive a neural fuzzy system for specific domains. The multi neuron-fuzzy classification (Multi-NFClass) model proposed that uses input, hidden layers, output, and subclasses that have a multitude in each class. This model derives fuzzy rules to classify patterns into a number of crisp classes. Firstly, an attempt is made to describe fuzzy if–then rules, and construction of the fuzzy if–then rule, that are determined by the simple steps when its antecedent fuzzy sets are specified by genetic operations, …

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Parameter Identification For Ordinary And Delay Differential Equations By Using Flat Inputs, René Schenkendorf, Michael Mangold Sep 2014

Parameter Identification For Ordinary And Delay Differential Equations By Using Flat Inputs, René Schenkendorf, Michael Mangold

René Schenkendorf

The concept of differential flatness has been widely used for nonlinear controller design. In this contribution, it is shown that flatness may also be a very useful property for parameter identification. An identification method based on flat inputs is introduced. The treatment of noisy measurements and the extension of the method to delay differential equations are discussed. The method is illustrated by two case studies: the well-known FitzHugh-Nagumo equations and a virus replication model with delays.

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Simulating Burr Type Vii Distributions Through The Method Of L-Moments And L-Correlations, Mohan D. Pant, Todd C. Headrick Aug 2014

Simulating Burr Type Vii Distributions Through The Method Of L-Moments And L-Correlations, Mohan D. Pant, Todd C. Headrick

Mohan Dev Pant

Burr Type VII, a one-parameter non-normal distribution, is among the less studied distributions, especially, in the contexts of statistical modeling and simulation studies. The main purpose of this study is to introduce a methodology for simulating univariate and multivariate Burr Type VII distributions through the method of L-moments and L-correlations. The methodology can be applied in statistical modeling of events in a variety of applied mathematical contexts and Monte Carlo simulation studies. Numerical examples are provided to demonstrate that L-moment-based Burr Type VII distributions are superior to their conventional moment-based analogs in terms of distribution fitting and estimation. Simulation results …

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Lessons Learned In Customizing Hosted Contentdm 6, M Ryan Hess Aug 2014

Lessons Learned In Customizing Hosted Contentdm 6, M Ryan Hess

M Ryan Hess

DePaul University Library will share its lessons learned and recommendations for hosted CONTENTdm 6 administrators wishing to customize CONTENTdm in a way that strikes the right balance between default CONTENTdm sites and sites that stand out and better serve our unique audiences. The DePaul University Library has learned many lessons from customizing its hosted instance of CONTENTdm 6, including the use of jQuery to add interface enhancements and remove some native CONTENTdm features. Unfortunately, this did not prove a long-term solution due to some limitations of CONTENTdm’s built-in customization tools, leading to content management issues and bugs that were hard …

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Crop Decision-Making To Protect Soil And Water, David J. Muth Aug 2014

Crop Decision-Making To Protect Soil And Water, David J. Muth

David J. Muth

David Muth, a founding partner and senior vice president for analytics at AgSolver Inc., discusses crop decision making in the context of soil and water protection.

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Adam: Automated Detection And Attribution Of Malicious Webpages, Ahmed E. Kosba, Aziz Mohaisen, Andrew G. West, Trevor Tonn, Huy Kang Kim Aug 2014

Adam: Automated Detection And Attribution Of Malicious Webpages, Ahmed E. Kosba, Aziz Mohaisen, Andrew G. West, Trevor Tonn, Huy Kang Kim

Andrew G. West

Malicious webpages are a prevalent and severe threat in the Internet security landscape. This fact has motivated numerous static and dynamic techniques to alleviate such threats. Building on this existing literature, this work introduces the design and evaluation of ADAM, a system that uses machine-learning over network metadata derived from the sandboxed execution of webpage content. ADAM aims to detect malicious webpages and identify the nature of those vulnerabilities using a simple set of features. Machine-trained models are not novel in this problem space. Instead, it is the dynamic network artifacts (and their subsequent feature representations) collected during rendering that …

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Mathematical Structure Of Fuzzy Modeling Of Medical Diagnoses By Using Clustering Models, R.W. W. Hndoosh Aug 2014

Mathematical Structure Of Fuzzy Modeling Of Medical Diagnoses By Using Clustering Models, R.W. W. Hndoosh

R. W. Hndoosh

An Adaptive-Network-based Fuzzy Inference System ANFIS with different techniques of clustering is successfully developed to solve one of the problems of medical diagnoses, because it has the advantage of powerful modeling ability. In this paper, we propose the generation of an adaptive neuro-Fuzzy Inference System model using different clustering models such as a subtractive fuzzy clustering (SFC) model and a fuzzy c-mean clustering (FCM) model in the Takagi-Sugeno (TS) fuzzy model for selecting the hidden node centers. An experimental result on datasets of medical diagnoses shows the proposed model with two models of clustering (ANFIS-SFC & ANFIS-FCM) while comparing the …

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The Strauss Conjecture On Kerr Black Hole Backgrounds, Hans Lindblad, Jason Metcalfe, Christopher D. Sogge, Mihai H. Tohaneanu, Chengo Wang Aug 2014

The Strauss Conjecture On Kerr Black Hole Backgrounds, Hans Lindblad, Jason Metcalfe, Christopher D. Sogge, Mihai H. Tohaneanu, Chengo Wang

Mihai H. Tohaneanu

We examine solutions to semilinear wave equations on black hole backgrounds and give a proof of an analog of the Strauss conjecture on the Schwarzschild and Kerr, with small angular momentum, black hole backgrounds. The key estimates are a class of weighted Strichartz estimates, which are used near infinity where the metrics can be viewed as small perturbations of the Minkowski metric, and a localized energy estimate on the black hole background, which handles the behavior in the remaining compact set.

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Asimmetria Del Rischio Sistematico Dei Titolo Immobiliari Americani: Nuove Evidenze Econometriche, Paola De Santis, Carlo Drago Jul 2014

Asimmetria Del Rischio Sistematico Dei Titolo Immobiliari Americani: Nuove Evidenze Econometriche, Paola De Santis, Carlo Drago

Carlo Drago

In questo lavoro riscontriamo un aumento del rischio sistematico dei titoli del mercato immobiliare americano nell’anno 2007 seguito da un ritorno ai valori iniziali nell’anno 2009 e si evidenzia la possibile presenza di break strutturali. Per valutare il suddetto rischio sistematico è stato scelto il modello a tre fattori di Fama e French ed è stata studiata la relazione tra l’extra rendimento dell’indice REIT, utilizzato come proxy dell’andamento dei titoli immobiliari americani, e l’extra rendimento dell’indice S&P500 rappresentativo del rendimento del portafoglio di mercato. I risultati confermano la presenza di un “Asymmetric REIT Beta Puzzle” coerentemente con alcuni precedenti studi …

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Mcd - Stata Commands, Joseph M. Hilbe Jul 2014

Mcd - Stata Commands, Joseph M. Hilbe

Joseph M Hilbe

Stata commands and affiliated files for examples in book. Text file explanation of command names is included. 103 files in total

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Mcd-Description, Joseph M. Hilbe Jul 2014

Mcd-Description, Joseph M. Hilbe

Joseph M Hilbe

Modeling Count Data - description of Data Files with examples using R, Stata and SAS

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Mcd-Information-, Joseph M. Hilbe Jul 2014

Mcd-Information-, Joseph M. Hilbe

Joseph M Hilbe

Modeling Count Data - Information about book and resources

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Mcd - 11 R Data Files From Book, Joseph M. Hilbe Jul 2014

Mcd - 11 R Data Files From Book, Joseph M. Hilbe

Joseph M Hilbe

Modeling Count Data: ZIP file with 11 R data files from book

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Mcd - 11 Stata Data Files, Joseph M. Hilbe Jul 2014

Mcd - 11 Stata Data Files, Joseph M. Hilbe

Joseph M Hilbe

Modeling Count Data: 11 Stata files from book

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Hilbe-Mcd-Cvs-Data, Joseph M. Hilbe Jul 2014

Hilbe-Mcd-Cvs-Data, Joseph M. Hilbe

Joseph M Hilbe

Modeling Count Data, data files from book in CVS format

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Synthesis, Characterization, Antimicrobial Activity And Applications Of Polyanilineti(Iv)Arsenophosphate Adsorbent For The Analysis Of Organic And Inorganic Pollutants, Mohammad Oves Jul 2014

Synthesis, Characterization, Antimicrobial Activity And Applications Of Polyanilineti(Iv)Arsenophosphate Adsorbent For The Analysis Of Organic And Inorganic Pollutants, Mohammad Oves

Mohammad Oves

No abstract provided.

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Mcd Information, Joseph M. Hilbe Jul 2014

Mcd Information, Joseph M. Hilbe

Joseph M Hilbe

Information on Modeling Count Data

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Mcd Description Data Files: Stata-R-Sas-Excel, Joseph M. Hilbe Jul 2014

Mcd Description Data Files: Stata-R-Sas-Excel, Joseph M. Hilbe

Joseph M Hilbe

Modeling Count Data: Description of Data Files R, Stata, SAS examples

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Mcd-Figures-Code, Joseph M. Hilbe Jul 2014

Mcd-Figures-Code, Joseph M. Hilbe

Joseph M Hilbe

Modeling Count Data, code for Figures in book - R and Stata

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Mdc-Sas-Code, Joseph M. Hilbe Jul 2014

Mdc-Sas-Code, Joseph M. Hilbe

Joseph M Hilbe

Modeling Count Data, SAS files for download and use

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Mcd-Data-Sas, Joseph M. Hilbe Jul 2014

Mcd-Data-Sas, Joseph M. Hilbe

Joseph M Hilbe

Modeling Count Data, 11 SAS data files. SAS users

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