Results 1 to 10 of about 2,730,800 (71)
The XMM deep survey in the CDF-S. IX. An X-ray outflow in a luminous obscured quasar at z~1.6 [PDF]
, 2015 In active galactic nuclei (AGN)-galaxy co-evolution models, AGN winds and outflows are often invoked to explain why super-massive black holes and galaxies stop growing efficiently at a certain phase of their lives.
C. Vignali +53 more
semanticscholar +1 more source
Actor-agnostic Multi-label Action Recognition with Multi-modal Query [PDF]
, 2023 Existing action recognition methods are typically actor-specific due to the intrinsic topological and apparent differences among the actors. This requires actor-specific pose estimation (e.g., humans vs. animals), leading to cumbersome model design complexity and high maintenance costs.
arxiv +1 more source
Actors -- A Process Algebra Based Approach [PDF]
arXiv, 2021 We model actors based on truly concurrent process algebra, and capture the actor model in the following characteristics: (1) Concurrency: all actors execute concurrently; (2) Asynchrony: an actor receives and sends messages asynchronously; (3) Uniqueness: an actor has a unique name and the associate unique mail box name; (4) Concentration: an actor ...
arxiv
EPTCS 223, 2016, pp. 51-66, 2016 In this paper we introduce a new programming model of multi-threaded actors which feature the parallel processing of their messages. In this model an actor consists of a group of active objects which share a message queue. We provide a formal operational semantics, and a description of a Java-based implementation for the basic programming abstractions ...
arxiv +1 more source
A Configurable Transport Layer for CAF [PDF]
, 2018 The message-driven nature of actors lays a foundation for developing scalable and distributed software. While the actor itself has been thoroughly modeled, the message passing layer lacks a common definition. Properties and guarantees of message exchange often shift with implementations and contexts.
arxiv +1 more source
Actor and Action Modular Network for Text-based Video Segmentation [PDF]
arXiv, 2020 Text-based video segmentation aims to segment an actor in video sequences by specifying the actor and its performing action with a textual query. Previous methods fail to explicitly align the video content with the textual query in a fine-grained manner according to the actor and its action, due to the problem of \emph{semantic asymmetry}.
arxiv
An Algebra of Actors Based on True Concurrency [PDF]
arXiv, 2017 An algebra of actors $\textrm{A}\pi$ fully captures the properties of actors based on asynchronous $\pi$-calculus, but, it is based on the interleaving bisimulation semantics. We adjust $\textrm{A}\pi$ to $\textrm{A}\pi_{tc}$ to make $\textrm{A}\pi$ having a truly concurrent semantics. We give the syntax and operational semantics of $\textrm{A}\pi_{tc}$
arxiv
Formal Model of Web Service Composition: An Actor-Based Approach to Unifying Orchestration and Choreography [PDF]
arXiv, 2013 Web Service Composition creates new composite Web Services from the collection of existing ones to be composed further and embodies the added values and potential usages of Web Services. Web Service Composition includes two aspects: Web Service orchestration denoting a workflow-like composition pattern and Web Service choreography which represents an ...
arxiv
On the chemistry of typestate-oriented actors [PDF]
arXiv, 2016 Typestate-oriented programming is an extension of the OO paradigm in which objects are modeled not just in terms of interfaces but also in terms of their usage protocols, describing legal sequences of method calls, possibly depending on the object's internal state. We argue that the Actor Model allows typestate-OOP in an inherently distributed setting,
arxiv
libcppa - Designing an Actor Semantic for C++11 [PDF]
arXiv, 2013 Parallel hardware makes concurrency mandatory for efficient program execution. However, writing concurrent software is both challenging and error-prone. C++11 provides standard facilities for multiprogramming, such as atomic operations with acquire/release semantics and RAII mutex locking, but these primitives remain too low-level.
arxiv