Plan recognition for space telerobotics

Current research on space telerobots has largely focused on two problem areas: executing remotely controlled actions (the tele part of telerobotics) or planning to execute them (the robot part). This work has largely ignored one of the key aspects of telerobots: the interaction between the machine and its operator. For this interaction to be felicitous, the machine must successfully understand what the operator is trying to accomplish with particular remote-controlled actions. Only with the understanding of the operator's purpose for performing these actions can the robot intelligently assist the operator, perhaps by warning of possible errors or taking over part of the task. There is a need for such an understanding in the telerobotics domain and an intelligent interface being developed in the chemical process design domain addresses the same issues

PARADISE: A Framework for Evaluating Spoken Dialogue Agents

This paper presents PARADISE (PARAdigm for DIalogue System Evaluation), a general framework for evaluating spoken dialogue agents. The framework decouples task requirements from an agent's dialogue behaviors, supports comparisons among dialogue strategies, enables the calculation of performance over subdialogues and whole dialogues, specifies the relative contribution of various factors to performance, and makes it possible to compare agents performing different tasks by normalizing for task complexity.Comment: 10 pages, uses aclap, psfig, lingmacros, time

Creating Full Individual-level Location Timelines from Sparse Social Media Data

In many domain applications, a continuous timeline of human locations is critical; for example for understanding possible locations where a disease may spread, or the flow of traffic. While data sources such as GPS trackers or Call Data Records are temporally-rich, they are expensive, often not publicly available or garnered only in select locations, restricting their wide use. Conversely, geo-located social media data are publicly and freely available, but present challenges especially for full timeline inference due to their sparse nature. We propose a stochastic framework, Intermediate Location Computing (ILC) which uses prior knowledge about human mobility patterns to predict every missing location from an individual's social media timeline. We compare ILC with a state-of-the-art RNN baseline as well as methods that are optimized for next-location prediction only. For three major cities, ILC predicts the top 1 location for all missing locations in a timeline, at 1 and 2-hour resolution, with up to 77.2% accuracy (up to 6% better accuracy than all compared methods). Specifically, ILC also outperforms the RNN in settings of low data; both cases of very small number of users (under 50), as well as settings with more users, but with sparser timelines. In general, the RNN model needs a higher number of users to achieve the same performance as ILC. Overall, this work illustrates the tradeoff between prior knowledge of heuristics and more data, for an important societal problem of filling in entire timelines using freely available, but sparse social media data.Comment: 10 pages, 8 figures, 2 table

A 6-3 Supreme Court Could Allow the Government to Openly Discriminate in Its Policies

Over the past few days, the Supreme Court has agreed to hear challenges to hot-button Trump administration policies involving the border wall, an attempt to exclude noncitizens from the census breakdown used for allocating seats in Congress and limits on who can apply for asylum from Mexico

Textualism, Judicial Supremacy, and the Independent State Legislature Theory

This piece offers an extended critique of one aspect of the so-called independent state legislature theory. That theory, in brief, holds that the federal Constitution gives state legislatures, and withholds from any other state entity, the power to regulate federal elections. Proponents ground their theory in two provisions of the federal Constitution: Article I\u27s Elections Clause, which provides that [t]he Times, Places and Manner of holding Elections for Senators and Representatives, shall be prescribed in each State by the Legislature thereof, and Article H\u27s Presidential Electors Clause, which provides that [e]ach State shall appoint, in such Manner as the Legislature thereof may direct, a Number of Electors, equal to the whole Number of Senators and Representatives to which the State may be entitled in the Congress. Proponents defend the theory as consistent with the text and structure of the Constitution, as well as some nineteenth-century practice. While the independent state legislature theory (ISLT) purports to elevate state legislatures in the name of popular sovereignty and democracy, in fact it dramatically expands the power of the federal judiciary at the expense of both. At base, the ISLT is primarily a claim of authority on the part of federal courts: it inverts a core principle of judicial federalism by maintaining that the federal Constitution empowers federal courts to override the judgments of state courts, state executive-branch officials, and state voters about the meaning of state law. In the hands of the current Supreme Court, this assertion of interpretive supremacy imposes on the states a narrow mode of statutory interpretation-textualism-whose key justifications are largely inapplicable to the states, with their myriad and varied institutional arrangements. The ISLT is fatally inconsistent with basic precepts of both federalism and the separation of powers. But more than that, the ISLT is a lawless power grab by the federal courts masquerading as deference to a romanticized vision of the state legislature that fails to take state institutional design choices seriously on their own terms

The Link Between Voting Rights and the Abortion Ruling

The Supreme Court’s opinion in Dobbs v. Jackson Women’s Health Organization gives states the maximum amount of freedom to restrict abortion. The decision is so sweeping that, under its logic, states could ban abortion even in cases of rape or incest; they may even be able — as the dissent notes — to prohibit abortions in circumstances in which a doctor believes the procedure is necessary to preserve the life or health of the pregnant person

A New Supreme Court Case Threatens Another Body Blow to Our Democracy

When the Supreme Court overruled Roe v. Wade, the justices in the majority insisted they were merely returning the issue of abortion to the democratic process. But a case the court has announced it will hear in its October term could make that democratic process a lot less democratic

Brewster quasi bound states in the continuum in all-dielectric metasurfaces from single magnetic-dipole resonance meta-atoms

Bound states in the continuum (BICs) are ubiquitous in many areas of physics, attracting especial interest for their ability to confine waves with infinite lifetimes. Metasurfaces provide a suitable platform to realize them in photonics; such BICs are remarkably robust, being however complex to tune in frequency-wavevector space.Here we propose a scheme to engineer BICs and quasi-BICs with single magnetic-dipole resonance meta-atoms. Upon changing the orientation of the magnetic-dipole resonances, we show that the resulting quasi-BICs,emerging from the symmetry-protected BIC at normal incidence, become transparent for plane-wave illumination exactly at the magnetic-dipole angle, due to a Brewster-like effect. While yielding infinite Q-factors at normalincidence(canonical BIC), these are termed Brewster quasi-BICs since a transmission channel is always allowed that slightly widens resonances at oblique incidences. This is demonstrated experimentally through reflectance measurements in the microwave regime with high-refractive-index mm-disk metasurfaces. Such Brewster-inspired configuration is a plausible scenario to achieve quasi-BICs throughout the electromagnetic spectrum inaccessible through plane-wave illumination at given angles, which could be extrapolated to other kind of waves.Comment: 15 pages, 7 figures; typos corrected, Figs. 3 & 5 modified, new Fig. 7 & references adde

Anisotropic Laplace-Beltrami Operators for Shape Analysis

International audienceThis paper introduces an anisotropic Laplace-Beltrami operator for shape analysis. While keeping useful properties of the standard Laplace-Beltrami operator, it introduces variability in the directions of principal curvature, giving rise to a more intuitive and semantically meaningful diffusion process. Although the benefits of anisotropic diffusion have already been noted in the area of mesh processing (e.g. surface regularization), focusing on the Laplacian itself, rather than on the diffusion process it induces, opens the possibility to effectively replace the omnipresent Laplace-Beltrami operator in many shape analysis methods. After providing a mathematical formulation and analysis of this new operator, we derive a practical implementation on discrete meshes. Further, we demonstrate the effectiveness of our new operator when employed in conjunction with different methods for shape segmentation and matching