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Articles 1 - 30 of 149
Full-Text Articles in Entire DC Network
Automated Algorithm For The Identification Of Artifacts In Mottled And Noisy Images, Onome Augustine Ugbeme, Eli S. Saber, Wencheng Wu, Kartheek Chandu
Automated Algorithm For The Identification Of Artifacts In Mottled And Noisy Images, Onome Augustine Ugbeme, Eli S. Saber, Wencheng Wu, Kartheek Chandu
Articles
We describe a method for automatically classifying image-quality defects on printed documents. The proposed approach accepts a scanned image where the defect has been localized a priori and performs several appropriate image processing steps to reveal the region of interest. A mask is then created from the exposed region to identify bright outliers. Morphological reconstruction techniques are then applied to emphasize relevant local attributes. The classification of the defects is accomplished via a customized tree classifier that utilizes size or shape attributes at corresponding nodes to yield appropriate binary decisions. Applications of this process include automated/assisted diagnosis and repair of …
Reporter - December 22nd 2006, Rit Reporter Staff
Reporter - December 22nd 2006, Rit Reporter Staff
University Publications
Music Venues; Roch. Music Coalition; Cricket Spin Review; Listen With Your Heart; Andre Foxxe; The Real RIT Rings; At Your Leisure; The CD; Melee Records; RIT Has Panache; WITR; CDIGIX; Online Music Alternatives; Word On the Street; Music Desk; RIT Rings; Dr. Simone’s Playlist
The Complexity Of Computing The Size Of An Interval, Lane A. Hemaspaandra, Christopher M. Homan, Sven Kosub, Klaus W. Wagner
The Complexity Of Computing The Size Of An Interval, Lane A. Hemaspaandra, Christopher M. Homan, Sven Kosub, Klaus W. Wagner
Articles
Given a p-order A over a universe of strings (i.e., a transitive, reflexive, antisymmetric relation such that if (x, y) ∈ A then |x| is polynomially bounded by |y|), an interval size function of A returns, for each string x in the universe, the number of strings in the interval between strings b(x) and t(x) (with respect to A), where b(x) and t(x) are functions that are polynomial-time computable in the length of x. By choosing sets of interval size functions based on feasibility requirements for their underlying p-orders, we obtain new characterizations of complexity classes. We prove that the …
Reporter - December 15th 2006, Rit Reporter Staff
Reporter - December 15th 2006, Rit Reporter Staff
University Publications
Greenvehicle Team; SEAL Club; RIT Forecast; SG Senate Update; NaNoWriMo; Quest For the Best Bathroom; Pick Of Destiny Review; At Your Leisure; Grade Infl ation; Does Your GPA Matter?; Word on the Street; Sports Desk; Sports Clubs Unfrozen; RIT Rings; Nuclear Proportions
Cosmological Constraints From The Sdss Luminous Red Galaxies, Max Tegmark, Daniel J. Eisenstein, Michael Strauss, David H. Weinberg, Michael R. Blanton, Joshua A. Frieman, Masataka Fukugita, James E. Gunn, Andrew J. S. Hamilton, Gillian R. Knapp, Robert C. Nichol, Jeremiah P. Ostriker, Nikhil Padmanabhan, Will J. Percival, David J. Schlegel, Donald P. Schneider, Roman Scoccimarro, Uroš Seljak, Hee-Jong Seo, Molly Swanson, Alexander S. Szalay, Michael S. Vogeley, Jaiyul Yoo, Idit Zehavi, Kevork Abazajian, Scott F. Anderson, James Annis, Neta A. Bahcall, Bruce Bassett, Andreas Berlind, John Brinkman, Tamás Budavari, Francisco Castander, Andrew Connolly, Istvan Csabai, Mamoru Doi, Douglas P. Finkbeiner, Bruce Gillespie, Karl Glazebrook, Gregory S. Hennessy, David W. Hogg, Željko Ivezić, Bhuvnesh Jain, David Johnston, Stephen Kent, Donald Q. Lamb, Brian C. Lee, Huan Lin, Jon Loveday, Robert H. Lupton, Jeffrey A. Munn, Kaike Pan, Changbom Park, John Peoples, Jeffrey R. Pier, Adrian Pope, Michael Richmond, Constance Rockosi, Ryan Scranton, Ravi K. Sheth, Albert Stebbins, Christopher Stoughton, István Szapudi, Douglas L. Tucker, Daniel E. Vanden Berk, Brian Yanny, Donald G. York
Cosmological Constraints From The Sdss Luminous Red Galaxies, Max Tegmark, Daniel J. Eisenstein, Michael Strauss, David H. Weinberg, Michael R. Blanton, Joshua A. Frieman, Masataka Fukugita, James E. Gunn, Andrew J. S. Hamilton, Gillian R. Knapp, Robert C. Nichol, Jeremiah P. Ostriker, Nikhil Padmanabhan, Will J. Percival, David J. Schlegel, Donald P. Schneider, Roman Scoccimarro, Uroš Seljak, Hee-Jong Seo, Molly Swanson, Alexander S. Szalay, Michael S. Vogeley, Jaiyul Yoo, Idit Zehavi, Kevork Abazajian, Scott F. Anderson, James Annis, Neta A. Bahcall, Bruce Bassett, Andreas Berlind, John Brinkman, Tamás Budavari, Francisco Castander, Andrew Connolly, Istvan Csabai, Mamoru Doi, Douglas P. Finkbeiner, Bruce Gillespie, Karl Glazebrook, Gregory S. Hennessy, David W. Hogg, Željko Ivezić, Bhuvnesh Jain, David Johnston, Stephen Kent, Donald Q. Lamb, Brian C. Lee, Huan Lin, Jon Loveday, Robert H. Lupton, Jeffrey A. Munn, Kaike Pan, Changbom Park, John Peoples, Jeffrey R. Pier, Adrian Pope, Michael Richmond, Constance Rockosi, Ryan Scranton, Ravi K. Sheth, Albert Stebbins, Christopher Stoughton, István Szapudi, Douglas L. Tucker, Daniel E. Vanden Berk, Brian Yanny, Donald G. York
Articles
We measure the large-scale real-space power spectrum P(k) using luminous red galaxies (LRGs) in the Sloan Digital Sky Survey (SDSS) and use this measurement to sharpen constraints on cosmological parameters from the Wilkinson Microwave Anisotropy Probe (WMAP). We employ a matrix-based power spectrum estimation method using Pseudo-Karhunen-Lo`eve eigenmodes, producing uncorrelated minimum-variance measurements in 20 k-bands of both the clustering power and its anisotropy due to redshift-space distortions, with narrow and well-behaved window functions in the range 0.01 h/Mpc < k < 0.2 h/Mpc. Results from the LRG and main galaxy samples are consistent, with the former providing higher signal-to-noise. Our results are robust to omitting angular and radial density fluctuations and are consistent between different parts of the sky. They provide a striking confirmation of the predicted large-scale CDM power spectrum. Combining only SDSS LRG and WMAP data places robust constraints on many cosmological parameters that complement prior analyses of multiple data sets. The LRGs provide independent cross-checks on m and the baryon fraction in good agreement with WMAP. Within the context of flat CDM models, our LRG measurements complementWMAP by sharpening the constraints on the matter density, the neutrino density and the tensor amplitude by about a factor of two, giving m = 0.24±0.02 (1 ), Pmν < 0.9 eV (95%) and r < 0.3 (95%). Baryon oscillations are clearly detected and provide a robust measurement of the comoving distance to the median survey redshift z = 0.35 independent of curvature and dark energy properties. Within the CDM framework, our power spectrum measurement improves the evidence for spatial flatness, sharpening the curvature constraint tot = 1.05±0.05 from WMAP alone to tot = 1.003±0.010. Assuming tot = 1, the equation of state parameter is constrained to w = −0.94±0.09, indicating the potential for more ambitious future LRG measurements to provide precision tests of the nature of dark energy. All these constraints are essentially independent of scales k > 0.1h/Mpc and associated nonlinear complications, yet agree well with more aggressive published analyses where nonlinear modeling is crucial.
The Acs Virgo Cluster Survey. Xiv. Analysis Of Color-Magnitude Relations In Globular Cluster Systems, Steffen Mieske, Andres Jordan, Patrick Cote
The Acs Virgo Cluster Survey. Xiv. Analysis Of Color-Magnitude Relations In Globular Cluster Systems, Steffen Mieske, Andres Jordan, Patrick Cote
Articles
We examine the correlation between globular cluster (GC) color and magnitude using HST/ACS imaging for a sample of 79 early-type galaxies (−21.7 < MB < −15.2 mag) with accurate surfacebrightness fluctuation distances from the ACS Virgo Cluster Survey. Using the KMM mixture modeling algorithm, we find a highly significant correlation, z ≡ d(g−z) dz = −0.037 ± 0.004, between color and magnitude for the subpopulation of blue GCs in the co-added GC color-magnitude diagram of the three brightest Virgo cluster galaxies (M49, M87 and M60). The sense of the correlation is such that brighter GCs are redder than their fainter counterparts. For the single GC systems of M87 and M60, we find similar correlations; M49 does not appear to show a significant trend. There is no correlation between (g − z) and Mz for GCs belonging to the red subpopulation. The correlation g ≡ d(g−z) dg for the blue subpopulation is much weaker than z. Using Monte Carlo simulations, we attribute this finding to the fact that the blue subpopulation in Mg extends to higher luminosities than does the red subpopulation, which biases the KMM fit results. The highly significant correlation between color and Mz, however, is a real effect: this conclusion is supported by biweight fits to the same color distributions. We identify two environmental dependencies which influence the derived color-magnitude relation: (1) the slope of the color-magnitude relation decreases in significance with decreasing galaxy luminosity, although it remains detectable over the full luminosity range of our sample; and (2) the slope is stronger for GC populations located at smaller galactocentric distances. These characteristics suggest that the observed trend is, at least partially, shaped by external agents. We examine several physical mechanisms that might give rise to the observed color-magnitude relation including: (1) presence of contaminants like super-clusters, stripped galactic nuclei, or ultra-compact dwarfs; (2) accretion of GCs from low-mass galaxies; (3) stochastic effects; (4) the capture of field stars by individual GCs; and (5) GC self-enrichment. Although none of these scenarios offers a fully satisfactory explanation of the observations, we conclude that self-enrichment and field-star capture, or a combination of these processes, offer the most promising means of explaining our observations.
Reporter - December 8th 2006, Rit Reporter Staff
Reporter - December 8th 2006, Rit Reporter Staff
University Publications
Letters to the Editor; RIT Forecast; New Orleans Revisited; Saosin Music Review; Phillips Eastern Restaurant; At Your Leisure; Victor Wooten; Adjunct Professors; The RIT Faculty; Winter Sports Preview; RIT Rings; Drafting
Tass Mark Iv Photometric Survey Of The Northern Sky, Thomas Droege, Michael Richmond, Michael Sallman, Robert P. Creager
Tass Mark Iv Photometric Survey Of The Northern Sky, Thomas Droege, Michael Richmond, Michael Sallman, Robert P. Creager
Articles
The Amateur Sky Survey (TASS) is a loose confederation of amateur and professional astronomers. We describe the design and construction of our Mark IV systems, a set of wide-field telescopes with CCD cameras which take simultaneous images in the V and IC passbands. We explain our observational procedures and the pipeline which processes and reduces the images into lists of stellar positions and magnitudes. We have compiled a large database of measurements for stars in the northern celestial hemisphere with V -band magnitudes in the range 7 < V < 13. This paper describes data taken over the four-year period starting November, 2001. One of our results is a catalog of repeated measurements on the Johnson-Cousins system for over 4.3 million stars.
Contribution Of Stellar Tidal Disruptions To The X-Ray Luminosity Function Of Active Galaxies, Miloš Milosavljević, David Merritt, Luis C. Ho
Contribution Of Stellar Tidal Disruptions To The X-Ray Luminosity Function Of Active Galaxies, Miloš Milosavljević, David Merritt, Luis C. Ho
Articles
The luminosity function of active galactic nuclei has been measured down to luminosities ∼ 1042 ergs s-1 in the soft and hard X-rays. Some fraction of this activity is associated with the accretion of the material liberated by the tidal disruption of stars by massive black holes. We estimate the contribution to the X-ray luminosity function from the tidal disruption process. While the contribution depends on a number poorly known parameters, it appears that it can account for the majority of X-ray selected AGN with soft or hard Xray luminosities . 1043 - 1044 ergs s-1. If this is correct, …
Reporter - November 10th 2006, Rit Reporter Staff
Reporter - November 10th 2006, Rit Reporter Staff
University Publications
A Eulogy For My Nephew; Response to ROAR; OffBeat Quiz; RIT Forecast; Women of RIT Calendar; Helping African Refugees; Moe’s Southwest Grill; Campin’ Out for Wii and PS3; The Latest in 3-D; Phantasy Star Review; At Your Leisure; Trouble at Gallaudet; History of Protest at RIT; Word on the Street; Sports Desk; RIT Hockey; RIT Rings; Lies: How to Stand on Them
Reporter - November 3rd 2006, Rit Reporter Staff
Reporter - November 3rd 2006, Rit Reporter Staff
University Publications
No abstract provided.
Spectral Adaptation: A Reason To Use The Wavenumber Scale, Mark D. Fairchild
Spectral Adaptation: A Reason To Use The Wavenumber Scale, Mark D. Fairchild
Presentations and other scholarship
Chromatic adaptation refers to the ability of the human visual system to adjust to the color of the illumination, or other prevailing stimuli, such that perceived object colors vary far less with changes in illumination than would be expected from simple radiometry or colorimetry. Models of chromatic adaptation are generally formulated as extensions of the von Kries hypothesis of some sort of independent gain control mechanisms operating on the three types of cone signals. This paper introduces a new way to model the phenomenon with no requirement for the first stage chromatic processing. This model is referred to as a …
Reporter - October 27th 2006, Rit Reporter Staff
Reporter - October 27th 2006, Rit Reporter Staff
University Publications
No abstract provided.
There Is No 2-(22,8,4) Block Design, Richard Bilous, Clement W.H. Lam, Larry H. Thiel, Ben P.C. Li, G.H. John Van Rees, Stanislaw P. Radziszowski, Wolfgang H. Holzmann, Hadi Kharaghani
There Is No 2-(22,8,4) Block Design, Richard Bilous, Clement W.H. Lam, Larry H. Thiel, Ben P.C. Li, G.H. John Van Rees, Stanislaw P. Radziszowski, Wolfgang H. Holzmann, Hadi Kharaghani
Articles
In this paper we show that a 2-(22, 8, 4) design does not exist. This result was obtained by a computer search.
A Nexus Of Education, Inspiration, Research And Play, Andrew Phelps
A Nexus Of Education, Inspiration, Research And Play, Andrew Phelps
Presentations and other scholarship
No abstract provided.
Reporter - October 20th 2006, Rit Reporter Staff
Reporter - October 20th 2006, Rit Reporter Staff
University Publications
No abstract provided.
Reporter - October 13th 2006, Rit Reporter Staff
Reporter - October 13th 2006, Rit Reporter Staff
University Publications
No abstract provided.
Trends In The Globular Cluster Luminosity Function Of Early-Type Galaxies, Andrés Jordán, Dean E. Mclaughlin, Patrick Côté, David Merritt, Et Al.
Trends In The Globular Cluster Luminosity Function Of Early-Type Galaxies, Andrés Jordán, Dean E. Mclaughlin, Patrick Côté, David Merritt, Et Al.
Articles
We present results from a study of the globular cluster luminosity function (GCLF) in a sample of 89 earlytype galaxies observed as part of the ACS Virgo Cluster Survey. Using a Gaussian parametrization of the GCLF, we find a highly significant correlation between the GCLF dispersion, , and the galaxy luminosity, MB,gal, in the sense that the GC systems in fainter galaxies have narrower luminosity functions. The GCLF dispersions in the Milky Way and M31 are fully consistent with this trend, implying that the correlation between sigma and galaxy luminosity is more fundamental than older suggestions that GCLF shape is …
Reporter - October 6th 2006, Rit Reporter Staff
Reporter - October 6th 2006, Rit Reporter Staff
University Publications
No abstract provided.
Effect Of Nanostructure On The Thermal Oxidation Of Atomized Iron, Mohit Kumar, Naveen Rawat, Ksv Santhanam
Effect Of Nanostructure On The Thermal Oxidation Of Atomized Iron, Mohit Kumar, Naveen Rawat, Ksv Santhanam
Presentations and other scholarship
The effect of nanostructure on the thermal oxidation of atomized iron has been investigated. Above 500oC atomized iron is oxidized in the presence of air. However, when iron is compacted with multiwalled carbon nanotubes (MWCNT) this oxidation is shifted by more than 100oC. Iron is protected by the nanostructure environment A large number of compositions of atomic ratios of iron and MWCNT have been examined in this study to understand the effect in detail. The effect of nanostructure in the thermal oxidation of iron is interpreted as due to iron atom experiencing extensive overlap and confinement effect causing spin transfer. …
Evaluating Threat Assessment For Multi-Stage Cyber Attacks, Shanchieh Jay Yang, Jared Holsopple, Moises Sudit
Evaluating Threat Assessment For Multi-Stage Cyber Attacks, Shanchieh Jay Yang, Jared Holsopple, Moises Sudit
Presentations and other scholarship
Current practices to defend against cyber attacks are typically reactive yet passive. Recent research work has been proposed to proactively predict hacker's target entities in the early stage of the attack. With prediction, there comes false alarms and missed attacks. Very little has been reported on how to evaluate a threat assessment algorithm, especially for cyber security. Because of the variety and the constantly changing nature of hacker behavior and network vulnerabilities, a cyber threat assessment algorithm is, perhaps more susceptible that for other application domains. This work sets forth the issues on evaluating cyber threat assessment algorithms, and discusses …
Reporter - Setpember 29th 2006, Rit Reporter Staff
Reporter - Setpember 29th 2006, Rit Reporter Staff
University Publications
No abstract provided.
Reporter - Setpember 22nd 2006, Rit Reporter Staff
Reporter - Setpember 22nd 2006, Rit Reporter Staff
University Publications
No abstract provided.
Reporter - September 15th 2006, Rit Reporter Staff
Reporter - September 15th 2006, Rit Reporter Staff
University Publications
No abstract provided.
Reporter - September 8th 2006, Rit Reporter Staff
Reporter - September 8th 2006, Rit Reporter Staff
University Publications
No abstract provided.
A Hybrid Thermal Video And Ftir Spectrometer System For Rapidly Locating And Characterizing Gas Leaks, David J. Williams, Winthrop Wadsworth, Carl Salvaggio, David W. Messinger
A Hybrid Thermal Video And Ftir Spectrometer System For Rapidly Locating And Characterizing Gas Leaks, David J. Williams, Winthrop Wadsworth, Carl Salvaggio, David W. Messinger
Articles
Undiscovered gas leaks, known as fugitive emissions, in chemical plants and refinery operations can impact regional air quality and present a loss of product for industry. Surveying a facility for potential gas leaks can be a daunting task. Industrial leak detection and repair programs can be expensive to administer. An efficient, accurate and cost effective method for detecting and quantifying gas leaks would both save industries money by identifying production losses and improve regional air quality. Specialized thermal video systems have proven effective in rapidly locating gas leaks. These systems, however, do not have the spectral resolution for compound identification. …
Small Ramsey Numbers, Stanislaw Radziszowski
Small Ramsey Numbers, Stanislaw Radziszowski
Articles
We present data which, to the best of our knowledge, includes all known nontrivial values and bounds for specific graph, hypergraph and multicolor Ramsey numbers, where the avoided graphs are complete or complete without one edge. Many results pertaining to other more studied cases are also presented. We give references to all cited bounds and values, as well as to previous similar compilations. We do not attempt complete coverage of asymptotic behavior of Ramsey numbers, but concentrate on their specific values.
Minimal Rankings And The A-Rank Number Of A Path, Victor Kostyuk, Darren Narayan, Victoria Shults
Minimal Rankings And The A-Rank Number Of A Path, Victor Kostyuk, Darren Narayan, Victoria Shults
Articles
Given a graph G, a function f:V(G)→ {1,2,…,k} is a k-ranking of G if f(u)=f(v) implies every u-v path contains a vertex w such that f(w)>f(u). A k-ranking is minimal if the reduction of any label greater than 1 violates the described ranking property. The arank number of a graph, denoted ψr(G), is the largest k such that G has a minimal k-ranking. We present new results involving minimal k-rankings of paths. In particular, we determine ψr(Pn), a problem posed by Laskar and Pillone in 2000 (Refer to PDF file for exact formulas).
Modeling The Spectral Effects Of Water And Soil As Surface Contaminants In A High Resolution Optical Image Simulation, Kristin Strackerjan, Lon Smith, John Kerekes
Modeling The Spectral Effects Of Water And Soil As Surface Contaminants In A High Resolution Optical Image Simulation, Kristin Strackerjan, Lon Smith, John Kerekes
Articles
The primary interest of this research is to introduce selected environmental effects into RIT’s Digital Imaging and Remote Sensing Image Generation (DIRSIG) Model. DIRSIG is capable of producing high resolution images (meter scale) using Computer Aided Design models (CAD) of buildings, vehicles, trees, etc. across the full optical spectrum (0.35-25μm). Currently, these objects are modeled in a pristine manner and there is no option to simulate them after exposure to environmental effects. Ideally, we would like to subject a given material to these environmental effects and then accurately model the modified reflected or emitted spectrum. As a first step, we …
Exploring The Career And Family Orientations Of Entrepreneurs: The Impact Of Gender And Dependent Status, Richard Demartino, Robert Barbato, Paul H. Jacques
Exploring The Career And Family Orientations Of Entrepreneurs: The Impact Of Gender And Dependent Status, Richard Demartino, Robert Barbato, Paul H. Jacques
Presentations and other scholarship
This study explores the career/achievement and family orientations of entrepreneurs - specifically the impact of sex and dependent child status. While a growing body of research has explored the similarities and uniqueness of women, none have explicitly analyzed entrepreneurs employing a career/achievement and family framework. Additionally, no studies have sought to explore the career/achievement and family orientations of female entrepreneurs with female non-entrepreneurs of similar backgrounds. Consequently, this research explores and compares the career/achievement and family orientations of female entrepreneurs with a group of female non-entrepreneurs with similar educational levels, ages, and work experience. It also compares the orientations of …