Mobile wireless computing devices provide interesting opportunities for building new styles of interactive applications by exploiting ad hoc networks. The basic networking technology needed to support such applications is readily available. The paper describes the design and implementation of a small scale auction application in an ad hoc network. It is important to develop a variety of interac...

Fixed-scale speckles are used in existing ghost imaging system, while the current instrument can achieve multiscale speckles ghost imaging. This paper focuses on the research of compressed sensing ghost imaging system using multi-scale speckles. Through the computer simulation and using the four resolution scales image as the original image, restored images are obtained to analysis on a variety...

This paper discusses the relationships between computer mediated communications and other forms of communication and describes a particular computer conferencing system in use within IBM. The system described is quite large, with over three thousand contributors and over twenty thousand readers. We discuss the structure of the system, the actions that users can take, and the ways in which the s...

Cloud computing, one type of distributed systems, is becoming very popular. It has demonstrated easily processing very large data over commodity clusters is possible with correct programming model and infrastructure. One critical issue here lies in the file system (FS) [1]. In this report, I reviewed a number of outstanding distributed file systems (DFS).

A very large schlieren optical system (2.3x2.9m field-of-view) and its applications in thermal airflow visualization, high-speed imaging of shock waves, and full-scale equipment studies are described. In order to have such a large field-of-view this is a lens-and-grid-type schlieren system using a very large grid as a light source, as first described at the 7 ISFV. It is currently the largest i...

The revolution of Internet and the Web takes the computer and information technology into a new age. The information on the web is growing very fast. The progress of information and communication technologies has made accessible a large amount of information, which have provided each of us with access to far more information than we can comprehend or manage. This emphasizes the difficulty with ...

In this paper, we explain a library system for small-scale libraries. This system uses books and face images for administration of lending and returning books. Users can borrow books by facing the front of the camera, presenting the book, and clicking the "Borrow" button. When returning books, users are required to click the "Return" button in the same way as on borrowing. The librarian can che...

This paper introduces a client/peer architecture providing services similar to Group Communication systems, but with the scalability of peer-to-peer systems and its dynamic behavior. We present Clippee, a first prototype of this client/peer architecture. Clippee employs a data replication scheme based on an optimistic use of locks, without running an expensive consensus protocol. We believe tha...

Exascale supercomputers will have the potential for billionway parallelism. While physical implementations of these systems are currently not available, HPC system designers can develop models of exascale systems to evaluate system design points. Modeling these systems and associated subsystems is a significant challenge. In this paper, we present the Co-design of Exascale Storage System (CODES...

Tree boosting is an important type of machine learning algorithms that is widely used in practice. In this paper, we describe XGBoost, a reliable, distributed machine learning system to scale up tree boosting algorithms. The system is optimized for fast parallel tree construction, and designed to be fault tolerant under the distributed setting. XGBoost can handle tens of millions of samples on ...