This paper examines two problems in document-level sentiment analysis: (1) determining whether a given document is a review or not, and (2) classifying the polarity of a review as positive or negative. We first demonstrate that review identification can be performed with high accuracy using only unigrams as features. We then examine the role of four types of simple linguistic knowledge sources ...

A current concern of modern societies is the quality of their educational systems. Learning Management Systems (LMSs) are technological tools that have been used to improve and extend the traditional educational system. Although LMSs have greatly benefited from technological advances, this type of educational platforms are still in need of mechanisms to provide virtual educational environments ...

Teachers often perceive educational research as confusing and can be disenfranchised by the research process. We propose scaffolded authethnography as a method to support principled examination of authentic practice. The approach is appealing because it is motivated by the teacher’s own day-to-day practice in a research context. Our demonstration of this method uses an analytical autoethnograph...

Many data warehouses contain massive amounts of data and grow rapidly. Examples include warehouses with retail sales data capturing customer behavior and warehouses with click-stream data capturing user behavior on web sites. The sheer size of these warehouses makes them increasingly hard to manage and query efficiently. As time passes, old, detailed data in the warehouses tend to become less i...

The automatic identification of prosodic events such as pitch accent in English has long been a topic of interest to speech researchers, with applications to a variety of spoken language processing tasks. However, much remains to be understood about the best methods for obtaining high accuracy detection. We describe experiments examining the optimal domain for accent analysis. Specifically, we ...

This research focuses on the identification and characterisation of accents in French. For both foreign and regional accents, we started with perceptual identification experiments, we measured phonetic features which may characterise these accents using automatic phoneme alignment, and we ranked the most discriminating features by using classification techniques. The following features are perc...

The design of a new type heat meters based on RFID technology are presented in this paper. By use of RFID technology in heat meters, the data can be exchanged between heat meters and heat supplying department by RF cards. The information can be transmitted in a non-contact way. In this way, the purpose of automatic identification can be achieved. The experimental study of the heat meters is als...

Non-native speakers of English far outnumber native speakers; English is the main language of books, newspapers, airports, air-traffic control, international business, academic conferences, science, technology, diplomacy, sports, international competitions, pop music, and advertising (British Council 2014). Online education in the form of massive online open courses is also primarily in English...

Radio Frequency Identification (RFID) technologies provide automatic and accurate object data capturing capability and enable real-time object visibility and traceability. Potential benefits have been widely reported for improving manufacturing shop-floor management. However, reports on how such potentials come true in real-life shopfloor daily operations are very limited. As a result, skeptics...

With the rapid development of RFID technology, the EPCglobal network has drawn considerable attention from both research and industry communities, which enables supply chain partners to automatically share information and improve the visibility of supply chains. As the information shared in the EPCglobal network is usually sensitive and valuable, security mechanisms should be provided. In this ...