This paper describes our process of building a classifier for ratings data as assigned in spring semester of Machine Learning (CS123A), taught by Pengyu Hong at Brandeis University. The data set can be characterized by a large number of sparsely populated attributes (n=291) corresponding to ratings of 1 through 5 from the online ratings system, Yelp. To attack this problem we tried a wide varie...

A.V. Adamopoulos∗1, S. Likothanassis2, N.G. Pavlidis3, and M.N Vrahatis3 1 Medical Physics Laboratory, Department of Medicine, Democritus University of Thrace, GR-68100 Alexandroupolis, Hellas 2 Pattern Recognition Laboratory, Department of Computer Engineering and Informatics, University of Patras, GR-26500 Patras, Hellas 3 Computational Intelligence Laboratory (CI Lab), University of Patras A...

The negatively charged nitrogen vacancy (NV-) center in diamond is the focus of widespread attention for applications ranging from quantum information processing to nanoscale metrology. Although most work so far has focused on the NV- optical and spin properties, control of the charge state promises complementary opportunities. One intriguing possibility is the long-term storage of information,...

In this paper we describe the services that are offered by CERN [3] for Long Term preservation of High Energy Physics (HEP) data, with the Large Hadron Collider (LHC) as a key use case. Data preservation is a strategic goal for European High Energy Physics (HEP) [9], as well as for the HEP community worldwide and we position our work in this global content. Specifically, we target the preservat...

The longevity of many data formats is uncertain at best, and more often is disturbingly brief. Maintenance of backwards compatibility of proprietary formats is frustratingly limited. The physical media that store digital data are ephemeral. Even if the data are properly preserved, the information that allows the data to be searched and which maintains the context of the data is often lost, thre...

Opinion Polls can be used as a means to reach weak agreement, an idea introduced by the LOCKSS system [1]. In this paper, we investigate a set of protocols that achieve data resilience for the long-term using a peer-to-peer network, where mutually untrusted peers are loosely organized. Peers use Opinion Polls to heal corrupted copies of data items instead of conventional methods that use consen...

The test parameters were selected as a direct result of a previous study.1 That work involved five Liquid Crystal Display (LCD) projectors and two projectors based on Digital Light ProcessingTM technology. The sample size for this test was increased to seven LCD projectors and nine DLPTM projectors. Like the previous work, this study was supported by Texas Instruments Incorporated (TI). TI pers...

The ZEUS data preservation (ZEUS DP) project assures continued access to the data and documentation related to the experiment. It aims to provide the ability to continue the generation of valuable scientific results from these data in the future. This talk presents analysis opportunities within the ZEUS DP project and its benefits for the physics community. The implications of the preserved dat...

Solar radiation data are available for many locations on an hourly basis. Simulation studies of solar energy systems have generally used these hourly values to estimate longterm annual performance, although solar radiation can exhibit wide variations during an hour. Variations in solar radiation during an hour, such as on a minute basis, could result in inaccurate performance estimates for some...

In the context of archiving of physical documents, long-term storage has long been accepted to mean centuries. Digital documents are much more ephemeral, so archivists should be aware of the inherent limitations of the technologies available for preservation of digital data. This paper compiles the results of several studies on this subject, in addition to presenting new findings on what can be...