6,870 research outputs found

    With a Little Help from My Friends: The Federal Government\u27s Reliance on Cooperation from the States in Enforcing Immigration Policy

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    Part I of this Note describes (A) the legislative developments of United States immigration policy from its roots; (B) the history of deportation laws; (C) deportation for controlled substance violations; (D) Kansas‘s modern criminal sentencing policy; and (E) the convergence of all of the above in Martinez. Part II distills (A) the trend toward exclusion in the history of immigration policy; (B) the policy considerations underlying sentencing guidelines; (C) the interplay between state and federal policymakers in immigration law; and (D) the problems with the Kansas Court of Appeals‘s decision in Martinez. Part III explores (A) the basis of the Martinez decision and the appellate court‘s misconception; (B) a hypothetical situation in which the court did not misconceive, yet made incorrect assumptions; and (C) a further hypothetical situation in which the court was correct in its assumptions, yet under any of the situations explored, its decision was inappropriate. Part IV summarizes the consequences of Martinez and the extent to which an alternative holding would promote teamwork between state and federal authorities and better execution of Congress‘s restrictive immigration policy

    Registration of retinal images from Public Health by minimising an error between vessels using an affine model with radial distortions

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    In order to estimate a registration model of eye fundus images made of an affinity and two radial distortions, we introduce an estimation criterion based on an error between the vessels. In [1], we estimated this model by minimising the error between characteristics points. In this paper, the detected vessels are selected using the circle and ellipse equations of the overlap area boundaries deduced from our model. Our method successfully registers 96 % of the 271 pairs in a Public Health dataset acquired mostly with different cameras. This is better than our previous method [1] and better than three other state-of-the-art methods. On a publicly available dataset, ours still better register the images than the reference method

    Direct evidence for the magnetic ordering of Nd ions in NdFeAsO by high resolution inelastic neutron scattering

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    We investigated the low energy excitations in the parent compound NdFeAsO of the Fe-pnictide superconductor in the μ\mueV range by a back scattering neutron spectrometer. The energy scans on a powder NdFeAsO sample revealed inelastic peaks at E = 1.600 ±0.003μ \pm 0.003 \mueV at T = 0.055 K on both energy gain and energy loss sides. The inelastic peaks move gradually towards lower energy with increasing temperature and finally merge with the elastic peak at about 6 K. We interpret the inelastic peaks to be due to the transition between hyperfine-split nuclear level of the 143^{143}Nd and 145^{145}Nd isotopes with spin I=7/2I = 7/2. The hyperfine field is produced by the ordering of the electronic magnetic moment of Nd at low temperature and thus the present investigation gives direct evidence of the ordering of the Nd magnetic sublattice of NdFeAsO at low temperature

    Trigger R&D for CMS at SLHC

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    CERN has made public a comprehensive plan for upgrading the LHC proton-proton accelerator to provide increased luminosity commonly referred to as Super LHC (SLHC) [1]. The plan envisages two phases of upgrades during which the LHC luminosity increases gradually to reach between 6-7×1034 cm-2sec-1. Over the past year, CMS has responded with a series of workshops and studies which have defined the roadmap for upgrading the experiment to cope with the SLHC environment. Increased luminosity will result in increased backgrounds and challenges for CMS and a major part of the CMS upgrade plan is a new Level-1 Trigger (L1T) system which will be able to cope with the high background environment at the SLHC. Two major CMS milestones will define the evolution of the CMS trigger upgrades: The change of the Hadronic Calorimeter electronics during phase-I and the introduction of the track trigger during phase-II. This paper outlines alternative designs for a new trigger system and the consequences for cost, latency, complexity and flexibility. In particular, it looks at how the trigger geometry of CMS could be mapped onto the latest generation of hardware while remaining backwards compatible with current infrastructure. A separate paper presented at this conference [2] looks at what could be possible if large parts of the trigger system were changed, or additional hardware added to create a time multiplexed trigger system

    The GCT Matrix Card and its Applications

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    The Matrix card is the first in what is expected to be a series of xTCA cards produced for a variety of projects at CMS. It was developed as a joint collaboration between colleagues at Princeton, Imperial College, LANL and CERN. The device comprises the latest generation of readilyavailable Xilinx FPGAs, cross-point switch technology and high-density optical links in a 3U form factor. In this paper we will discuss the development and test results of the Matrix card, followed by some of the tasks to which it is being applied

    The CMS Global Calorimeter Trigger Hardware Design

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    An alternative design for the CMS Global Calorimeter Trigger (GCT) is being implemented. The new design adheres to all the CMS specifications regarding interfaces and functional requirements of the trigger systems. The design is modular, compact, and utilizes proven components. Functionality has been partitioned to allow commissioning in stages corresponding to the different capabilities being made operational. The functional breakdown and hardware platform is presented and discussed. A related paper discusses the firmware required to implement the GCT functionality
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