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Articles 61 - 90 of 335
Full-Text Articles in Entire DC Network
Hepatitis B Virus Resistance To Adefovir In A Nucleotide Naive Patient With Chronic Hepatitis B Virus Infection, B Laoi, Celine M. Herra, S. Norris, B. Crowley
Hepatitis B Virus Resistance To Adefovir In A Nucleotide Naive Patient With Chronic Hepatitis B Virus Infection, B Laoi, Celine M. Herra, S. Norris, B. Crowley
Articles
No abstract provided.
The Internationalization Of Lay Legal Decision-Making: Jury Resurgence And Jury Research, Richard O. Lempert
The Internationalization Of Lay Legal Decision-Making: Jury Resurgence And Jury Research, Richard O. Lempert
Articles
When I first began to study the jury more than thirty years ago, the topic of this Journal issue, jury systems around the world, was unthinkable. The use of juries, especially in civil litigation, had long been in decline, to the point of near extinction in England, the land of their birth, and the live question was whether the jury system would endure in the United States. It seemed clear that juries would not continue in their classic form, as many U.S. states, with the Supreme Court's eventual approval, mandated juries of less than twelve people and allowed verdicts to …
Spin Flips And Precession In Black-Hole-Binary Mergers, Manuela Campanelli, Carlos O. Lousto, Yosef Zlochower, Badri Krishnan, David Merritt
Spin Flips And Precession In Black-Hole-Binary Mergers, Manuela Campanelli, Carlos O. Lousto, Yosef Zlochower, Badri Krishnan, David Merritt
Articles
We use the ‘moving puncture’ approach to perform fully non-linear evolutions of spinning quasicircular black-hole binaries with individual spins unaligned with the orbital angular momentum. We evolve configurations with the individual spins (parallel and equal in magnitude) pointing in the orbital plane and 45◦ above the orbital plane. We introduce a technique to measure the spin direction and track the precession of the spin during the merger, as well as measure the spin flip in the remnant horizon. The former configuration completes 1.75 orbits before merging, with the spin precessing by 98◦ and the final remnant horizon spin flipped by …
Supermassive Black Holes In The Sbc Spiral Galaxies Ngc 3310, Ngc 4303 And Ngc 4258, Guia Pastorini, Alessandro Marconi, Alessandro Capetti, David J. Axon, Daniel Batcheldor, Et Al.
Supermassive Black Holes In The Sbc Spiral Galaxies Ngc 3310, Ngc 4303 And Ngc 4258, Guia Pastorini, Alessandro Marconi, Alessandro Capetti, David J. Axon, Daniel Batcheldor, Et Al.
Articles
We have undertaken an HST Space Telescope Imaging Spectrograph survey of 54 late type spiral galaxies to study the scaling relations between black holes and their host spheroids at the low mass end. Our aim is to measure black hole masses or to set upper limits for a sizeable sample of spiral galaxies. In this paper we present new Space Telescope Imaging Spectrograph (STIS) observations of three spiral galaxies, NGC 4303, NGC 3310 and NGC 4258. The bright optical emission lines Hα λ 6564Å, [NII] λλ 6549, 6585Å and [SII] λλ 6718, 6732Å were used to study the kinematics of …
Large Merger Recoils And Spin Flips From Generic Black-Hole Binaries, Manuela Campanelli, Carlos O. Lousto, Yosef Zlochower, David Merritt
Large Merger Recoils And Spin Flips From Generic Black-Hole Binaries, Manuela Campanelli, Carlos O. Lousto, Yosef Zlochower, David Merritt
Articles
We report the first results from evolutions of generic black-hole binaries, i.e. a binary containing unequal mass black holes with misaligned spins. Our configuration, which has a mass ratio of 2 : 1, consists of an initially non-spinning hole orbiting a larger, rapidly spinning hole (specific spin a/m = 0.885), with the spin direction oriented −45◦ with respect to the orbital plane. We track the inspiral and merger for ∼ 2 orbits and find that the remnant receives a substantial kick of 454 kms−1, more than twice as large as the maximum kick from non-spinning binaries. The remnant spin direction …
Essay: On The Divergent American Reactions To Terrorism And Climate Change, Cass R. Sunstein
Essay: On The Divergent American Reactions To Terrorism And Climate Change, Cass R. Sunstein
Articles
Two of the most important sources of catastrophic risk are terrorism and climate change. The United States has responded aggressively to the risk of terrorism while doing very little about the risk of climate change. For the United States alone, the cost of the Iraq War is in excess of the anticipated cost of the Kyoto Protocol. The divergence presents a puzzle; it also raises more general questions about both risk perception and the public demand for legislation. The best explanation for the divergence emphasizes bounded rationality. Americans believe that aggressive steps to reduce the risk of terrorism promise to …
Performance Characteristics Of A Therapeutic Ultrasound Wire Waveguide, Graham Gavin, Garrett Mcguinness, Finbar Dolan, M.S. Hashmi
Performance Characteristics Of A Therapeutic Ultrasound Wire Waveguide, Graham Gavin, Garrett Mcguinness, Finbar Dolan, M.S. Hashmi
Articles
Therapeutic ultrasound angioplasty has been investigated, clinically, by a number of researchers and represents a potentially promising therapy for the treatment of atherosclerotic lesions. To date, there has been no detailed analysis of the effect of mechanical design parameters, such as wire geometry or damping characteristics, on wire waveguide performance. An apparatus capable of delivering therapeutic ultrasound down small diameter nickel–titanium (NiTi) wire waveguides is described. The output peak-to-peak (p–p) displacements at the distal tip of a 1.0mm diameter waveguide were measured experimentally, by means of an optical microscope and image analysis software. The output was measured for a range …
Parallel Java: A Unified Api For Shared Memory And Cluster Parallel Programming In 100% Java, Alan Kaminsky
Parallel Java: A Unified Api For Shared Memory And Cluster Parallel Programming In 100% Java, Alan Kaminsky
Articles
Parallel Java is a parallel programming API whose goals are (1) to support both shared memory (thread-based) parallel programming and cluster (message-based) parallel programming in a single unified API, allowing one to write parallel programs combining both paradigms; (2) to provide the same capabilities as OpenMP and MPI in an object oriented, 100% Java API; and (3) to be easily deployed and run in a heterogeneous computing environment of single-core CPUs, multi-core CPUs, and clusters thereof. This paper describes Parallel Java’s features and architecture; compares and contrasts Parallel Java to other Java based parallel middleware libraries; and reports performance measurements …
On Logic In The Law: Something, But Not All, Susan Haack
On Logic In The Law: Something, But Not All, Susan Haack
Articles
In 1880, when Oliver Wendell Holmes (later to be a Justice of the U.S. Supreme Court) criticized the "logical theology" of law articulated by Christopher Columbus Langdell (the first Dean of Harvard Law School), neither Holmes nor Langdell was aware of the revolution in logic that had begun, the year before, with Frege's Begriffsschrift. But there is an important element of truth in Holmes's insistence that a legal system cannot be adequately understood as a system of "axioms and corollaries"; and this element of truth is not obviated by the more powerful logical techniques that are now available.
An Ergonomic Assessment Of A Customer Service Organisation, Victor Hrymak
An Ergonomic Assessment Of A Customer Service Organisation, Victor Hrymak
Articles
An ergonomic assessment of a customer services organisation was carried out. The nethodology is described and the results presented together with recommendations
Collisionally Regenerated Dark Matter Structures In Galactic Nuclei, David Merritt, Stefan Harfst, Bertone Gianfranco
Collisionally Regenerated Dark Matter Structures In Galactic Nuclei, David Merritt, Stefan Harfst, Bertone Gianfranco
Articles
We show that the presence of a r−3/2 dark matter overdensity can be robustly predicted at the center of any galaxy old enough to have grown a power-law density cusp in the stars via the Bahcall-Wolf mechanism. Using both Fokker-Planck and direct N-body integrations, we demonstrate collisional generation of these dark matter “crests” (Collisionally REgenerated STtructures) even in the extreme case that the density of both stars and dark matter were previously lowered by slingshot ejection from a binary supermassive black hole. The time scale for collisional growth of the crest is approximately the two-body relaxation time as defined by …
A New Application For Displaying And Fusing Multimodal Data Sets, Karl Baum, María Helguera, Andrzej Krol
A New Application For Displaying And Fusing Multimodal Data Sets, Karl Baum, María Helguera, Andrzej Krol
Articles
A recently developed, freely available, application specifically designed for the visualization of multimodal data sets is presented. The application allows multiple 3D data sets such as CT (x-ray computer tomography), MRI (magnetic resonance imaging), PET (positron emission tomography), and SPECT (single photon emission tomography) of the same subject to be viewed simultaneously. This is done by maintaining synchronization of the spatial location viewed within all modalities, and by providing fused views of the data where multiple data sets are displayed as a single volume. Different options for the fused views are provided by plug-ins. Plug-ins typically used include color-overlays and …
The Acs Virgo Cluster Survey. Xiii. Sbf Distance Catalog And The Three-Dimensional Structure Of The Virgo Cluster, Simona Mei, John P. Blakeslee, Patrick Côté, John L. Tonry, Michael J. West, Laura Ferrarese, Andrés Jordán, Eric W. Peng, André Anthony, David Merritt
The Acs Virgo Cluster Survey. Xiii. Sbf Distance Catalog And The Three-Dimensional Structure Of The Virgo Cluster, Simona Mei, John P. Blakeslee, Patrick Côté, John L. Tonry, Michael J. West, Laura Ferrarese, Andrés Jordán, Eric W. Peng, André Anthony, David Merritt
Articles
The ACS Virgo Cluster Survey consists of HST/ACS imaging for 100 early–type galaxies in the Virgo cluster, observed in the F475W(≈ SDSS g) and F850LP (≈ SDSS z) filters. We derive distances for 84 of these galaxies using the method of Surface Brightness Fluctuations (SBF), present the SBF distance catalog, and use this database to examine the three-dimensional distribution of early–type galaxies in the Virgo Cluster. The SBF distance moduli have a mean (random) measurement error of 0.07 mag (0.5 Mpc), or roughly three times better than previous SBF measurements for Virgo Cluster galaxies. Five galaxies lie at a distance …
An Automatic Statistical Segmentation Algorithm For Extraction Of Fire And Smoke Regions, Ying Li, Anthony Vodacek, Yushan Zhu
An Automatic Statistical Segmentation Algorithm For Extraction Of Fire And Smoke Regions, Ying Li, Anthony Vodacek, Yushan Zhu
Articles
Estimation of the extent and spread of wildland fires is an important application of high spatial resolution multispectral images. This work addresses a fuzzy segmentation algorithm to map fire extent, active fire front, hot burn scar, and smoke regions based on a statistical model. The fuzzy results are useful data sources for integrated fire behavior and propagation models built using Dynamic Data Driven Applications Systems (DDDAS) concepts that use data assimilation techniques which require error estimates or probabilities for the data parameters. The Hidden Markov Random Field (HMRF) model has been used widely in image segmentation, but it is assumed …
The Common Law Genius Of The Warren Court, David A. Strauss
The Common Law Genius Of The Warren Court, David A. Strauss
Articles
The Warren Court's most important decisions-on school segregation, reapportionment, free speech, and criminal procedureare firmly entrenched in the law. But the idea persists, even among those who are sympathetic to the results that the Warren Court reached, that what the Warren Court was doing was somehow not really law: that the Warren Court "made it up," and that the important Warren Court decisions cannot be justified by reference to conventional legal materials. It is true that the Warren Court's most important decisions cannot be easily justified on the basis of the text of the Constitution or the original understandings. But …
''Don't Try This At Home': Posner As Political Economist, Lior Strahilevitz
''Don't Try This At Home': Posner As Political Economist, Lior Strahilevitz
Articles
No abstract provided.
Is Public Reason Counterproductive?, Eduardo Peñalver
A Simple Sol-Gel Processing For The Development Of High-Temperature Stable Photoactive Anatase Titania, Suresh Pillai, Declan Mccormack, John Colreavy
A Simple Sol-Gel Processing For The Development Of High-Temperature Stable Photoactive Anatase Titania, Suresh Pillai, Declan Mccormack, John Colreavy
Articles
No abstract provided.
The Effect Of The Rate Of Precursor Production On The Purity And Aggregation, Grainne Duffy, Declan Mccormack, Suresh Pillai
The Effect Of The Rate Of Precursor Production On The Purity And Aggregation, Grainne Duffy, Declan Mccormack, Suresh Pillai
Articles
The synthesis of zinc oxide through the decomposition of a solid oxalate precursor was investigated. It was found that the rate of preparation of the precursor had a quantitative effect on the morphology and extent of surface ligation of particles produced; contrary to our expectations,it was found that the slow combination of reagents led to a less pure product. It has been determined that this time dependence mimics the variation of reactant ratios. Zinc oxide particles were produced from a number of reactant ratios, and were characterised by TEM, XRD, FT-IR and DSC. It was found that the size of …
An Approach To Unification Using A Linear Systems Model For The Propagation Of Broad-Band Signals, Jonathan Blackledge
An Approach To Unification Using A Linear Systems Model For The Propagation Of Broad-Band Signals, Jonathan Blackledge
Articles
We review the inhomogeneous scalar Helmholtz equation in three-dimensions and the scattering of scalar wavefields from a scatterer of compact support. An asymptotic solution is then considered representing the effect of the frequency approaching zero when a ‘wavefield’ reduces to a ‘field’. The characteristics of ultra-low frequency Helmholtz scattering are then considered and the physical significance discussed of a model that is based on the scattering of Helmholtz wavefields over a broad frequency spectrum. This is equivalent to using a linear systems approach for modelling the propagation, interaction and detection of broad-band signals and provides an approach to the classification …
Modelling And Computer Simulation Of Radar Screening Using Plasma Clouds, Jonathan Blackledge
Modelling And Computer Simulation Of Radar Screening Using Plasma Clouds, Jonathan Blackledge
Articles
Following a brief introduction on the principles of screening an aerospace vehicle using a plasma, we develop models for the Impulse Response Functions (IRFs) associated with microwave (Radar) back-scattering from a strong and weakly ionized plasma screen. In the latter case, it is shown that the strength of the return signal is determined by an IRF that is characterised by the simple negative exponential exp(−σ0t/Є0) where σ0 is the average conductivity of the plasma, Є0 is the permittivity of free space and t is the two-way travel time. For a weakly ionized plasma, the …
Discontinuous Change In The Smectic Layer Thickness In Ferrielectric Liquid Crystals, V. P. Panov, J. K. Vij, Yuri Panarin, C. Blanc, V. Lorman, J. W. Goodby
Discontinuous Change In The Smectic Layer Thickness In Ferrielectric Liquid Crystals, V. P. Panov, J. K. Vij, Yuri Panarin, C. Blanc, V. Lorman, J. W. Goodby
Articles
The temperature dependence of the thickness of thick free-standing films is studied using a high-resolution film thickness measurement technique. A small discontinuity in the temperature dependence of the smectic layer thickness at every phase transition between ferro-, ferri-, and antiferroelectric phases is observed. We show that the major contribution to it arises from a change in the smectic tilt angle.
The Credible Executive, Eric A. Posner, Adrian Vermeule
The Credible Executive, Eric A. Posner, Adrian Vermeule
Articles
Legal and constitutional theory has focused chiefly on the risk that voters and legislators will trust an ill-motivated executive. This Article addresses the risk that voters and legislators will fail to trust a well-motivated executive. Absent some credible signal of benign motivations, voters will be unable to distinguish good from bad executives and will thus withhold authority that they would have preferred to grant, making all concerned worse off We suggest several mechanisms with which a well-motivated executive can credibly signal his type, including independent commissions within the executive branch; bipartisanship in appointments to the executive branch, or more broadly …
On Avoiding Foundational Questions - A Reply To Andrew Coan, Cass R. Sunstein
On Avoiding Foundational Questions - A Reply To Andrew Coan, Cass R. Sunstein
Articles
No abstract provided.
Willingness To Pay Vs. Welfare, Cass R. Sunstein
Technology, Information, And Bankruptcy, Douglas G. Baird
Technology, Information, And Bankruptcy, Douglas G. Baird
Articles
Financial innovations, spurred by the growth of information technology, have transformed the consumer lending industry. Today lenders have unfettered access to a wider spectrum of borrowers and are better able to assess the likelihood that these borrowers will repay the debt they incur. Consequently, the level of consumer household debt has risen dramatically in the past three decades, and will continue to rise, which will lead naturally to an increase in bankruptcy filings. Although our initial intuition tells us that bankruptcies are bad, the author advances the idea that this development is inevitable and that instead of focusing on amending …
Judge Richard Posner On Civil Liberties: Pragmatic Authoritarian Libertarian, Bernard E. Harcourt
Judge Richard Posner On Civil Liberties: Pragmatic Authoritarian Libertarian, Bernard E. Harcourt
Articles
No abstract provided.
Introduction To The Italian Edition Of Overdose, Richard A. Epstein
Introduction To The Italian Edition Of Overdose, Richard A. Epstein
Articles
No abstract provided.
If People Would Be Outraged By Their Rulings, Should Judges Care, Cass R. Sunstein
If People Would Be Outraged By Their Rulings, Should Judges Care, Cass R. Sunstein
Articles
At first glance, judicial anticipation of public outrage and its effects seems incompatible with judicial independence. Nonetheless, judges might be affected by the prospect of outrage for both consequentialist and epistemic reasons. If a judicial ruling would undermine the cause that it is meant to promote or impose serious social harms, judges might have reason to hesitate on consequentialist grounds. The prospect ofpublic outrage might also suggest that the court's ruling would be incorrect on the merits; if most people disagree with the court's decision, perhaps the court is wrong. Those who adopt a method of constitutional interpretation on consequentialist …
The Temporal Dimension Of Voting Rights, Adam B. Cox