The Staged Event-Driven Architecture (SEDA) is a new design for building scalable Internet services. SEDA has three major goals:
To support massive concurrency, on the order of TENS of thousands of clients per node
To exhibit robust performance under wide variations in load and,
To simplify the design of complex Internet services.
SEDA decomposes a complex, event-driven application into a set of stages connected by queues. This design avoids the high overhead associated with thread-based concurrency models, and decouples event and thread scheduling from application logic. SEDA enables services to be well-conditioned to load, preventing resources from being overcommitted when demand exceeds service capacity. Decomposing services into a set of stages also enables modularity and code reuse, as well as the development of debugging tools for complex event-driven applications.
Quartz is a full-featured, open source job scheduling system that can be integrated with, or used along side virtually any J2EE or J2SE application - from the smallest stand-alone application to the largest e-commerce system. Quartz can be used to create simple or complex schedules for executing TENS, hundreds, or even TENS-of-thousands of jobs jobs whose tasks are defined as standard Java components or EJBs. The Quartz Scheduler includes many enterprise-class features, such as JTA transactions and clustering.
CRFsuite is a very fast implmentation of the Conditional Random Fields (CRF) algorithm. It handles TENS of thousands sentences in merely one second.
In comparison to CRF++, CRFSuite yields substantially better efficiency performance
Quartz is a full-featured, open source job scheduling system that can be integrated with, or used along side virtually any J2EE or J2SE application - from the smallest stand-alone application to the largest e-commerce system. Quartz can be used to create simple or complex schedules for executing TENS, hundreds, or even TENS-of-thousands of jobs jobs whose tasks are defined as standard Java components or EJBs. The Quartz Scheduler includes many enterprise-class features, such as JTA transactions and clustering.
Quartz is freely usable, licensed under the Apache 2.0 license.
With more than two billion terminals in commercial operation world-wide, wire-
less and mobile technologies have enabled a first wave of pervasive communication
systems and applications. Still, this is only the beginning as wireless technologies
such as RFID are currently contemplated with a deployment potential of TENS of
billions of tags and a virtually unlimited application potential. A recent ITU report
depicts a scenario of “Internet of things” — a world in which billions of objects will
report their location, identity, and history over wireless connections.
Phenomenon is an overused and overloaded term, but somehow it seems appropriate for Arduino—an
endeavor that has caught the attention of an astonishingly wide range of people and provided
opportunities for those who might otherwise have never picked up a soldering iron or written a single
line of code. From dyed-in-the-wool hardware hackers to web page developers, robotics enthusiasts to
installation artists, textile students to musicians: all can be found in the Arduino community. The
versatility of the platform encompassing both hardware and software, combined with its inherent
openness, has captured the imagination of TENS of thousands of developers.
Design for manufacturability and statistical design encompass a number
of activities and areas of study spanning the integrated circuit design and
manufacturing worlds. In the early days of the planar integrated circuit, it was
typical for a handful of practitioners working on a particular design to have
a fairly complete understanding of the manufacturing process, the resulting
semiconductor active and passive devices, as well as the resulting circuit -
often composed of as few as TENS of devices. With the success of semiconductor
scaling, predicted and - to a certain extent even driven - by Moore’s law, and
the vastly increased complexity of modern nano-meter scale processes and the
billion-device circuits they allow, there came a necessary separation between
the various disciplines.
