612 research outputs found

    Perpetual Finality: In Immigration Removal Proceedings, Motions to Reopen Create More Problems Than They Solve

    Get PDF
    Immigrants who have been ordered removed may challenge their final removal order by filing a motion for the court to reopen their case. Motions to reopen removal cases are common within the immigration system, but offer little chance for an alien to actually receive relief. These motions are typically subject to strict time and numerical limitations. And the legal bases for reopening an immigrant’s case render the alien’s chances unlikely. Current statute and case law provide seven grounds for an immigrant to reopen a case. These grounds stem from United States Code, the Code of Federal Regulations, and the Board of Immigration Appeals’ precedential case law. Some of these grounds require such a perfect storm of unlikely circumstances that reopening becomes de facto impossible for an alien to attain. Some grounds are confusing, with requirements that are difficult for aliens, their attorneys, or even judges to understand. The remaining grounds have bright-line rules but are couched in ambiguous language. This leads attorneys to pursue reopening in cases that do not merit reopening, but seem to merit reopening because of the ambiguity. This Comment outlines the current legal bases for an alien seeking to reopen a removal case. It will explore the problems and shortcomings inherent to these bases. And it will recommend reforms to the current structure which will render the immigration post-conclusion structure fairer to the alien, clearer for the private attorneys, and more efficient for the government

    Perpetual Finality: In Immigration Removal Proceedings, Motions to Reopen Create More Problems Than They Solve

    Get PDF
    Immigrants who have been ordered removed may challenge their final removal order by filing a motion for the court to reopen their case. Motions to reopen removal cases are common within the immigration system, but offer little chance for an alien to actually receive relief. These motions are typically subject to strict time and numerical limitations. And the legal bases for reopening an immigrant’s case render the alien’s chances unlikely. Current statute and case law provide seven grounds for an immigrant to reopen a case. These grounds stem from United States Code, the Code of Federal Regulations, and the Board of Immigration Appeals’ precedential case law. Some of these grounds require such a perfect storm of unlikely circumstances that reopening becomes de facto impossible for an alien to attain. Some grounds are confusing, with requirements that are difficult for aliens, their attorneys, or even judges to understand. The remaining grounds have bright-line rules but are couched in ambiguous language. This leads attorneys to pursue reopening in cases that do not merit reopening, but seem to merit reopening because of the ambiguity. This Comment outlines the current legal bases for an alien seeking to reopen a removal case. It will explore the problems and shortcomings inherent to these bases. And it will recommend reforms to the current structure which will render the immigration post-conclusion structure fairer to the alien, clearer for the private attorneys, and more efficient for the government

    Wearable Sensor Data Based Human Activity Recognition using Machine Learning: A new approach

    Get PDF
    Recent years have witnessed the rapid development of human activity recognition (HAR) based on wearable sensor data. One can find many practical applications in this area, especially in the field of health care. Many machine learning algorithms such as Decision Trees, Support Vector Machine, Naive Bayes, K-Nearest Neighbor, and Multilayer Perceptron are successfully used in HAR. Although these methods are fast and easy for implementation, they still have some limitations due to poor performance in a number of situations. In this paper, we propose a novel method based on the ensemble learning to boost the performance of these machine learning methods for HAR

    Development of improved thermoelectric mater- ials for spacecraft applications final summary report, 29 jun. 1964 - 29 jun. 1965

    Get PDF
    Thermoelectric materials for spacecraft applications - optimization of bismuth-antimony alloys and ag-sb-fe-te-se system alloys for thermoelectric cooling in space environmen

    Polytype control of spin qubits in silicon carbide

    Get PDF
    Crystal defects can confine isolated electronic spins and are promising candidates for solid-state quantum information. Alongside research focusing on nitrogen vacancy centers in diamond, an alternative strategy seeks to identify new spin systems with an expanded set of technological capabilities, a materials driven approach that could ultimately lead to "designer" spins with tailored properties. Here, we show that the 4H, 6H and 3C polytypes of SiC all host coherent and optically addressable defect spin states, including spins in all three with room-temperature quantum coherence. The prevalence of this spin coherence shows that crystal polymorphism can be a degree of freedom for engineering spin qubits. Long spin coherence times allow us to use double electron-electron resonance to measure magnetic dipole interactions between spin ensembles in inequivalent lattice sites of the same crystal. Together with the distinct optical and spin transition energies of such inequivalent spins, these interactions provide a route to dipole-coupled networks of separately addressable spins.Comment: 28 pages, 5 figures, and supplementary information and figure

    The Principles of Social Order. Selected Essays of Lon L. Fuller, edited With an introduction by Kenneth I. Winston

    Get PDF
    The electron spins of semiconductor defects can have complex interactions with their host, particularly in polar materials like SiC where electrical and mechanical variables are intertwined. By combining pulsed spin resonance with ab initio simulations, we show that spin-spin interactions in 4H-SiC neutral divacancies give rise to spin states with a strong Stark effect, sub-10(-6) strain sensitivity, and highly spin-dependent photoluminescence with intensity contrasts of 15%-36%. These results establish SiC color centers as compelling systems for sensing nanoscale electric and strain fields

    Wearable Sensor Data Based Human Activity Recognition using Machine Learning: A new approach

    Get PDF
    International audienceRecent years have witnessed the rapid development of human activity recognition (HAR) based on werable sensor data. One can find many practical applications in this area, especially in the field of health care. Many machine learning algorithms such as Decision Trees, Support Vector Machine, Naive Bayes, K-Nearest Neighbor and Multilayer Perceptron are successfully used in HAR. Although these methods are fast and easy for implementation, they still have some limitations due to poor performance in a number of situations. In this paper, we propose a novel method based on the ensemble learning to boost the performance of these machine learning methods for HAR

    Effects of Cell Morphology and Attachment to a Surface on the Hydrodynamic Performance of Unicellular Choanoflagellates

    Get PDF
    Choanoflagellates, eukaryotes that are important predators on bacteria in aquatic ecosystems, are closely related to animals and are used as a model system to study the evolution of animals from protozoan ancestors. The choanoflagellate Salpingoeca rosetta has a complex life cycle with different morphotypes, some unicellular and some multicellular. Here we use computational fluid dynamics to study the hydrodynamics of swimming and feeding by different unicellular stages of S. rosetta: a swimming cell with a collar of prey-capturing microvilli surrounding a single flagellum, a thecate cell attached to a surface and a dispersal-stage cell with a slender body, long flagellum and short collar. We show that a longer flagellum increases swimming speed, longer microvilli reduce speed and cell shape only affects speed when the collar is very short. The flux of prey-carrying water into the collar capture zone is greater for swimming than sessile cells, but this advantage decreases with collar size. Stalk length has little effect on flux for sessile cells. We show that ignoring the collar, as earlier models have done, overestimates flux and greatly overestimates the benefit to feeding performance of swimming versus being attached, and of a longer stalk for attached cells
    • …
    corecore