Educational discussion boards are growing in use as they help students share knowledge and doubts in a working/studying environment. Although these interactive tools are highly effective in learning environments, their usability by blind students is very poor. In this paper we develop techniques to improve accessibility of educational content for students who are blind. Threads of messages in d...

Many text retrieval systems construct their index by accumulating postings in main memory until there is no more memory available and then creating an on-disk index from the in-memory data. When the entire text collection has been read, all on-disk indices are combined into one big index through a multiway merge process. This paper discusses several ways to arrange postings in memory and studie...

BACKGROUND While international literature on rural retention is expanding, there is a lack of research on relevant strategies from pluralistic healthcare environments such as India, where alternate medicine is an integral component of primary care. In such contexts, there is a constant tug of war in national policy on "Which health worker is needed in rural areas?" and "Who can, realistically, ...

BACKGROUND Mal-distribution of the health workforce with a strong bias for urban living is a major constraint to expanding midwifery services in Ghana. According to the UN Millennium Development Goals (MDG) report, the high risk of dying in pregnancy or childbirth continues in Africa. Maternal death is currently estimated at 350 per 100,000, partially a reflection of the low rates of profession...

Digital terrain models (DTM) typically contain large numbers of postings, from hundreds of thousands to billions. Many algorithms that run on DTMs require topological knowledge of the postings, such as finding nearest neighbors, finding the posting closest to a chosen location, etc. If the postings are arranged irregularly, topological information is costly to compute and to store. This paper o...

For text retrieval systems, the assumption that all data structures reside in main memory is increasingly common. In this context, we present a novel incremental inverted indexing algorithm for web-scale collections that directly constructs compressed postings lists in memory. Designing efficient in-memory algorithms requires understanding modern processor architectures and memory hierarchies: ...

It is difficult to understand students’ social practices from artifacts of anonymous online postings. The analysis of text genres and discursive types of online postings has potential for enhancing teaching and learning experiences of students. This article focuses on analysis of students’ anonymous online postings using Critical Discourse Analysis (CDA). The article argues that social practice...

Testing content-based anti-spam systems requires a plentiful source of both spam and ham. We examine the viability of Usenet postings as a ham source. While Usenet postings have been used before for this purpose, we refine the idea and show empirically that it is the text of Usenet replies that provides the best cut of ham.

BACKGROUND The Federal Democratic Republic of Nepal is a developing country in South Asia with a population of 29.8 million. In September 2011, there were 18 medical schools with 14 being in the private sector. KIST Medical College is a private school in Lalitpur district. The present study was conducted to obtain information on student perceptions about working in rural Nepal after graduation....

PURPOSE/OBJECTIVES To describe spiritual issues addressed by users of a pancreatic cancer informational Web site. DESIGN Qualitative, descriptive. SETTING The patient and family chat room of Johns Hopkins Hospital's pancreatic cancer Web site. SAMPLE 600 postings on the pancreatic cancer Web site. METHODS Identification of categories and themes in Web postings using the constant compari...