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Articles 2311 - 2340 of 2927
Full-Text Articles in Entire DC Network
Impact Of Dietary Carotenoid Deprivation On Macular Pigment And Serum Concentrations Of Lutein And Zeaxanthin, James Loughman, John Nolan, Stephan Beatty
Impact Of Dietary Carotenoid Deprivation On Macular Pigment And Serum Concentrations Of Lutein And Zeaxanthin, James Loughman, John Nolan, Stephan Beatty
Articles
No abstract provided.
Using Sketches And Knowledge Bases For Geo-Spatial Image Retrieval, Michela Bertolotto, James Carswell, E Mcloughlin, D O'Sullivan, C Wilson
Using Sketches And Knowledge Bases For Geo-Spatial Image Retrieval, Michela Bertolotto, James Carswell, E Mcloughlin, D O'Sullivan, C Wilson
Articles
This paper presents research in the field of knowledge management for geo-spatial imagery including scanned aerial photos and satellite images. We have developed a web-based system that allows users to query a database of images not only using metadata, but also drawing sketches of configurations of objects they are interested in as well as inputting textual descriptions of their intended task. Our system integrates case-based reasoning techniques to form a knowledge base from previously issued queries that can be exploited to improve future query processing and to build organizational memory through experience capture. The effective design and implementation of a …
Measured Stark Widths And Shifts Of The Neutral Argon Spectral Lines In 4s–4p And 4s–4p′ Transitions, Vladimir Milosavljevic, Albert R. Ellingboe, Stevan Djenize
Measured Stark Widths And Shifts Of The Neutral Argon Spectral Lines In 4s–4p And 4s–4p′ Transitions, Vladimir Milosavljevic, Albert R. Ellingboe, Stevan Djenize
Articles
We investigate the Stark widths (W) and the shift (d), of the seven neutral argon (Ar I) spectral lines from the 4s–4p and 4s–4p′ transitions. The line shapes are measured in a linear, low-pressure, optically thin pulsed arc discharge at about 16 000 K electron temperature (T) and about 7.0 × 1022 m− 3 electron density (N). The new data separates the electron width (We) and ion width Wi from the total Stark width (Wt), as well the separation of electron total Stark …
Spirobicyclic Diamines 1: Synthesis Of Proline-Derived Spirolactams Via Thermal Intramolecular Ester Aminolysis, Fintan Kelleher, Sinead Kelly
Spirobicyclic Diamines 1: Synthesis Of Proline-Derived Spirolactams Via Thermal Intramolecular Ester Aminolysis, Fintan Kelleher, Sinead Kelly
Articles
Proline derived [4.4]-spirolactams have been synthesised in good yields by a reductive-amination reaction followed by thermal cyclisation of the resulting amine onto the proline ester group in refluxing toluene. The synthesis of the corresponding [4.5]-spirolactams by the same method gave much reduced yields.
Spirobicyclic Diamines 2: Synthesis Of Homochiral Diastereoisomeric Proline Derived [4,4]-Spirolactams, Fintan Kelleher, Sinead Kelly
Spirobicyclic Diamines 2: Synthesis Of Homochiral Diastereoisomeric Proline Derived [4,4]-Spirolactams, Fintan Kelleher, Sinead Kelly
Articles
L-Proline derived diastereoisomeric [4.4]-spirolactams have been prepared by a reductive-amination reaction of (R)- or (S)-alanine methyl ester followed by thermal cyclisation of the resulting amine onto the proline ester group in refluxing toluene. Under similar conditions (R)- or (S)-phenylalanine methyl ester gave no cyclisation products, while R- or S-a-methylbenzylamine required treatment with NaNH2 in refluxing toluene to induce cyclisation giving diastereoisomeric [4.4]-spirolactams
Attention Driven Reference Resolution In Multimodal Contexts, John D. Kelleher
Attention Driven Reference Resolution In Multimodal Contexts, John D. Kelleher
Articles
In recent years a a number of psycholinguistic experiments have pointed to the interaction between language and vision. In particular, the interaction between visual attention and linguistic reference. In parallel with this, several theories of discourse have attempted to provide an account of the relationship between types of referential expressions on the one hand and the degree of mental activation on the other. Building on both of these traditions, this paper describes an attention based approach to visually situated reference resolution. The framework uses the relationship between referential form and preferred mode of interpretation as a basis for a weighted …
Comparative Phylogenomics Of Clostridium Difficile Reveals Clade Specificity And Microevolution Of Hypervirulent Strains., Denise Drudy
Comparative Phylogenomics Of Clostridium Difficile Reveals Clade Specificity And Microevolution Of Hypervirulent Strains., Denise Drudy
Articles
No abstract provided.
A Quantitative Assessment Of The Benefit Of A Learning Community Environment, Mario H. Castro-Cedeno
A Quantitative Assessment Of The Benefit Of A Learning Community Environment, Mario H. Castro-Cedeno
Articles
An introductory course in manufacturing processes was taught to a cohort of engineering technology students participating in a learning community (LC) experiment and to a group of non-participating students. The LC students were all freshmen and took all the courses as a group. They were encouraged to work in teams. Non-LC students were also encouraged to work in teams but their class schedules were not coordinated. Data were collected on test scores, homework scores, and homework completion rates. The data show that the standard deviation of the grades distribution is significantly smaller for the LC group and that outliers with …
Interaction Of Carbon Nanotubes With Sugar Complexes, Alan Casey, Gordon Farrell, Mary Mcnamara, Hugh Byrne, Gordon Chambers
Interaction Of Carbon Nanotubes With Sugar Complexes, Alan Casey, Gordon Farrell, Mary Mcnamara, Hugh Byrne, Gordon Chambers
Articles
The interaction of carbon nanotubes with soft organic molecules such as cyclodextrins and other saccarides has recently been shown to produce water soluble composites. Such systems offer considerable advantages over polymer based composites due to their biocompatibility and noncovalent coupling which can potentially preserve the unique properties of the tubes. The mechanism of interaction for such systems has been proposed to be dominated by hydrophobic and hydrophilic interactions along the surface of the tube. However efforts to characterise and rationalise such noncovalent interactions between the sugar-based materials and the carbon nanotubes have been slow to emerge. In this study a …
Go Mobile » Access By Rochester Institute Of Technology Core Collapse Via Coarse Dynamic Renormalization, Andras Szell, David Merritt, Ioannis Kevrekidis
Go Mobile » Access By Rochester Institute Of Technology Core Collapse Via Coarse Dynamic Renormalization, Andras Szell, David Merritt, Ioannis Kevrekidis
Articles
In the context of the recently developed “equation-free” approach to computer-assisted analysis of complex systems, we extract the self-similar solution describing core collapse of a stellar system from numerical experiments. The technique allows us to side-step the core “bounce” that occurs in direct N-body simulations due to the small-N correlations that develop in the late stages of collapse, and hence to follow the evolution well into the self-similar regime.
Overenforcement, Richard A. Bierschbach, Alex Stein
Overenforcement, Richard A. Bierschbach, Alex Stein
Articles
Overenforcement of the law is widespread but underinvestigated. Overenforcement occurs when the total sanction, both legal and extralegal, suffered by the violator of a legal rule exceeds the amount optimal for deterrence. Overenforcement sometimes generates overdeterrence that cannot be remedied through the adjustment of substantive liability standards or penalties in light of operational and expressive constraints. When that happens, the legal system can counteract the effects of overenforcement by adjusting evidentiary or procedural rules to make liability less likely. This framework, which we call the overenforcement paradigm, illuminates previously unnoticed features of various evidentiary and procedural arrangements. It also provides …
Henry Kandrup's Ideas About Relaxation Of Stellar Systems, David Merritt
Henry Kandrup's Ideas About Relaxation Of Stellar Systems, David Merritt
Articles
Henry Kandrup wrote prolifically on the problem of relaxation of stellar systems. His picture of relaxation was significantly more refined than the standard description in terms of phase mixing and violent relaxation. In this article, I summarize Henry’s work in this and related areas.
A Polarized Clutter Measurement Technique Based On The Governing Equation For Polarimetric Remote Sensing In The Visible To Near Infrared, James Ii Shell, John R. Schott
A Polarized Clutter Measurement Technique Based On The Governing Equation For Polarimetric Remote Sensing In The Visible To Near Infrared, James Ii Shell, John R. Schott
Articles
Polarization adds another dimension to the spatial intensity and spectral information typically acquired in remote sensing. Polarization imparted by surface reflections contains unique and discriminatory signatures which may augment spectral target-detection techniques. While efforts have been made toward quantifying the polarimetric bidirectional reflectance distribution function (pBRDF) responsible for target material polarimetric signatures, little has been done toward developing a description of the polarized background or scene clutter. An approach is presented for measuring the pBRDF of background materials such as vegetation. The governing equation for polarized radiance reaching a sensor aperture is first developed and serves as a basis for …
Deformable Model For 3d Intramodal Nonrigid Breast Image Registration With Fiducial Skin Markers, Mehmet Unlu, Andrzej Krol, Ioana Coman, James A. Mandel, Karl G. Baum, Wei Lee, Edward D. Lipson, David H. Feiglin
Deformable Model For 3d Intramodal Nonrigid Breast Image Registration With Fiducial Skin Markers, Mehmet Unlu, Andrzej Krol, Ioana Coman, James A. Mandel, Karl G. Baum, Wei Lee, Edward D. Lipson, David H. Feiglin
Articles
We implemented a new approach to intramodal non-rigid 3D breast image registration. Our method uses fiducial skin markers (FSM) placed on the breast surface. After determining the displacements of FSM, finite element method (FEM) is used to distribute the markers’ displacements linearly over the entire breast volume using the analogy between the orthogonal components of the displacement field and a steady state heat transfer (SSHT). It is valid because the displacement field in x, y and z direction and a SSHT problem can both be modeled using LaPlace’s equation and the displacements are analogous to temperature differences in SSHT. It …
United States - Definitive Safeguard Measures On Imports Of Certain Steel Products, Alan O. Sykes, Gene M. Grossman
United States - Definitive Safeguard Measures On Imports Of Certain Steel Products, Alan O. Sykes, Gene M. Grossman
Articles
No abstract provided.
Rules, The New Standards: Partisan Gerrymandering And Judicial Manageability After Vieth V. Jubelirer, Justin Driver
Rules, The New Standards: Partisan Gerrymandering And Judicial Manageability After Vieth V. Jubelirer, Justin Driver
Articles
No abstract provided.
Empirical Economics And The Study Of Punishment And Crime, Thomas J. Miles
Empirical Economics And The Study Of Punishment And Crime, Thomas J. Miles
Articles
No abstract provided.
Dollars And Death, Eric A. Posner, Cass R. Sunstein
Hayek, Law, And Cognition, Richard A. Posner
Free Speech And Academic Politics (Reviewing Donald Alexander Downs, Restoring Free Speech And Liberty On Campus (2005)), Geoffrey R. Stone
Free Speech And Academic Politics (Reviewing Donald Alexander Downs, Restoring Free Speech And Liberty On Campus (2005)), Geoffrey R. Stone
Articles
No abstract provided.
The Uses And Limits Of Local Knowledge: A Cautionary Note On Hayek, Richard A. Epstein
The Uses And Limits Of Local Knowledge: A Cautionary Note On Hayek, Richard A. Epstein
Articles
No abstract provided.
Policing L.A.'S Skid Row: Crime And Real Estate Redevelopment In Downtown Los Angeles (An Experiment In Real Time), Bernard E. Harcourt
Policing L.A.'S Skid Row: Crime And Real Estate Redevelopment In Downtown Los Angeles (An Experiment In Real Time), Bernard E. Harcourt
Articles
No abstract provided.
Classroom Interpreting And Visual Information Processing In Mainstream Education For Deaf Students: Live Or Memorex?, Marc Marschark, Jeff Pelz, Carol Convertino, Patricia Sapere, Mary Ellen Arndt, Rosemarie Seewagen
Classroom Interpreting And Visual Information Processing In Mainstream Education For Deaf Students: Live Or Memorex?, Marc Marschark, Jeff Pelz, Carol Convertino, Patricia Sapere, Mary Ellen Arndt, Rosemarie Seewagen
Articles
This study examined visual information processing and learning in classrooms including both deaf and hearing students. Of particular interest were the effects on deaf students’ learning of live (threedimensional) versus video-recorded (two-dimensional) sign language interpreting and the visual attention strategies of more and less experienced deaf signers exposed to simultaneous, multiple sources of visual information. Results from three experiments consistently indicated no differences in learning between three-dimensional and two-dimensional presentations among hearing or deaf students. Analyses of students’ allocation of visual attention and the influence of various demographic and experimental variables suggested considerable flexibility in deaf students’ receptive communication skills. …
Sol–Gel Derived Organic And Inorganic Hybrid Materials For Photonic Applications: Contribution To The Correlation Between The Material Structure And The Transmission In The Near Infrared Region, Mohamed Oubaha, P. Etienne And S. Calas, P. Coudray, J.M. Nedelec, Y. Moreau
Sol–Gel Derived Organic And Inorganic Hybrid Materials For Photonic Applications: Contribution To The Correlation Between The Material Structure And The Transmission In The Near Infrared Region, Mohamed Oubaha, P. Etienne And S. Calas, P. Coudray, J.M. Nedelec, Y. Moreau
Articles
A promising way of fabricating integrated optics components is based on the sol–gel synthesis and photocuring of organic-inorganic hybrid materials. However, the main factor limiting the development of passive devices is the propagation losses. Moreover, the possibility to compensate these attenuations by optical amplification is competed with the multiphonon relaxation associated to the presence of OH groups. To our knowledge, OH groups were always shown as the main responsible for attenuation at the telecommunication wavelengths, namely at 1310 and 1550 nm, although the matrix is composed of organic species which can contribute to absorptions in this spectral range. This paper …
Public Versus Private Enforcement Of International Economic Law: Standing And Remedy, Alan O. Sykes
Public Versus Private Enforcement Of International Economic Law: Standing And Remedy, Alan O. Sykes
Articles
This paper develops a theory of the rules regarding standing and remedy in international trade and investment agreements. Regarding investment agreements, the paper argues that a credibLe government-to-firm commitment (or signal) that the capital importer will not engage in expropriation or related practices is required and that a private right of action for money damages is the best way to make such a commitment. In trade agreements, by contrast, importing nations have commitments that are best viewed as government to government rather than government to firm. The parties to trade agreements can enhance their mutual political welfare by declining to …
Minimal Modules Over Valuation Domains, Brendan Goldsmith, P. Zanardo
Minimal Modules Over Valuation Domains, Brendan Goldsmith, P. Zanardo
Articles
Let R be a valuation domain. We say that a torsion-free R-module is minimal if it is isomorphic to all its submodules of finite index. Here, the usual concept of finite index for groups is replaced by the more appropriate (for module theory) definition: a submodule H of the module G is said to be of finite index in G if the quotient G/H is a finitely presented torsion module. We investigate minimality in various settings and show inter alia that over a maximal valuation domain, all torsion-free modules are minimal. Constructions of non-minimal modules are given by utilizing realization …
Identification And Recovery Of An Asymmetric Calix[4]Arene Tetranitrile Derivative Using Liquid Chromatography And Mass Spectrometry, Benjamin Schazmann, Dermot Diamond
Identification And Recovery Of An Asymmetric Calix[4]Arene Tetranitrile Derivative Using Liquid Chromatography And Mass Spectrometry, Benjamin Schazmann, Dermot Diamond
Articles
A simple analytical LC-MS (Liquid Chromatography Mass Spectrometry) method and associated instrumentation has been adapted for use by the organic chemist to yield mg quantities of target compound from a reaction mixture. Calix[4]arene 3 was identified as representing 51% of total peak area of a reaction mixture containing no less than 10 components, using LC-MS. This peak corresponded to a mass of 878.8, equivalent to a complex of 3 and an ammonium cation. Molecular models further rationalise this observation by showing that the asymmetric binding cavity of 3 is suitable for binding tetrahedral guests like the ammonium ion. By scaling …
Effect Of Temperature On The Kinetic Behaviour Of Polyphenol Oxidase And Peroxidase In Fresh-Cut Lettuce, Ana Belen Martin-Diana, Daniel Rico, Catherine Barry-Ryan, Jemina Mulcahy, Gary Henehan, Jesus Maria Frias
Effect Of Temperature On The Kinetic Behaviour Of Polyphenol Oxidase And Peroxidase In Fresh-Cut Lettuce, Ana Belen Martin-Diana, Daniel Rico, Catherine Barry-Ryan, Jemina Mulcahy, Gary Henehan, Jesus Maria Frias
Articles
Activity levels for polyphenol oxidase (PPO) and peroxidase (POD) enzymes were exanimate in crude extracts and showed significantly higher values in photosynthetic tissue than in vascular tissue. Time courses at 50 ºC showed a rapid loss of POD activity and a similar but slower loss of PPO activity in all tissue while incubations at 4 ºC and 25 ºC showed no significant loss of activity over the same time period. The thermal treatment of the extracts (50 ºC) caused a decrease in the PPO and POD activities over time, in all the samples. PPO had less dependence on temperature than …
Conformal Properties And Baecklund Transform For The Associated Camassa-Holm Equation, Rossen Ivanov
Conformal Properties And Baecklund Transform For The Associated Camassa-Holm Equation, Rossen Ivanov
Articles
Integrable equations exhibit interesting conformal properties and can be written in terms of the so-called conformal invariants. The most basic and important example is the KdV equation and the corresponding Schwarz-KdV equation. Other examples, including the Camassa-Holm equation and the associated Camassa-Holm equation are investigated in this paper. It is shown that the B¨acklund transform is related to the conformal properties of these equations. Some particular solutions of the Associated Camassa-Holm Equation are discussed also.
Asymptotic Methods In The Spectral Analysis Of Sturm-Liouville Operators, Daphne Gilbert
Asymptotic Methods In The Spectral Analysis Of Sturm-Liouville Operators, Daphne Gilbert
Articles
Gilbert, D.: Asymptotic Methods in the Spectral Analysis of Sturm-Lioville Operators.Sturm-Liouville theory : Past and Present, 2005, pp 121-136.