In some instances, extensive room-and-pillar workings can collapse with little warning and pose a serious risk to underground miners. Traditional strength-based pillar design methods applicable to coal or hard-rock mines use a factor of safety defined as pillar strength divided by pillar stress. Factor of stability, defined as local mine stiffness divided by post-failure pillar stiffness, may o...

Academic publishers' full text databases are an important part of the deep Web for researchers and a potentially valuable resource for automated extraction of scientific knowledge. Recently, some major publishers have provided Web APIs for accessing their article databases, thus allowing the development of Web applications to mine these resources. However the task of knowledge discovery from ac...

Usage of social media are increased considerably in today world it enables the user to share images with one another. Sharing the images may leads to performance violation. Web mining is use of data mining technique to discover and extract the information from the web. Web content mining is the extraction and integration of data, information and knowledge from web page. In the web, one can mine...

Comparing one thing with another is a typical part of human decision making process, especially during an online purchase scheme. Without comparing it is not fair to purchase a product, since it won’t give an ideal performance. To get rid of this difficulty, my paper presents an ideal way for automatically mine comparable entities from comparative questions that users posted online. It gives an...

Transcription factors play important roles in regulating biological and disease processes. Microarray technology has enabled researchers to simultaneously monitor changes in the expression of thousands of transcripts. By identifying specific transcription factor binding sites in the cis-regulatory regions of differentially expressed genes, it is then possible to identify direct targets of trans...

this study was carried out for the purpose of investigating the issue of tailings dams as a potential source of contamination by trace elements in soils at the sidi bou othmane mine in the marrakech region, morocco. soil samples taken from depths of up to 15 cm and within a radius of 50 m from the tailings dams, were analyzed for cd, cu, pb and zn using atomic absorption spectrometry. average c...

In this study, effects of solid concentration, temperature, and initial Fe2+ concentration on bioleaching of sulfide mineral (chalcopyrite) obtained from Sarcheshmeh Copper Mine in the region of Kerman located in the south of Iran were investigated. A mesophilic iron oxidizing bacterium, Acidithiobacillus ferrooxidans has been isolated from a typical chalcopyrite copper concentra...

The purpose of this paper is to show how opinion mining may offer an alternative way to improve course evaluation using students' attitudes posted on Internet forums, discussion groups and/or blogs, which are collectively called user-generated content. We propose a model to mine knowledge from students' opinions to improve teaching effectiveness in academic institutes. Opinion mining is used to...

Existing academic search systems like Google Scholar usually return a long list of scientific articles for a given research domain or topic (e.g. “document summarization”, “information extraction”), and users need to read volumes of articles to get some ideas of the research progress for a domain, which is very tedious and time-consuming. In this paper, we propose a novel system called AKMiner ...

The bioleachings of chalcopyrite ore were compared after inoculating different cultures enriched from the original acid mine drainage sample. The results showed that the higher bioleaching performance was achieved for inoculation with the enrichment D (0.5 % S, 2 % iron and 1 % chalcopyrite) compared to other enrichment systems. The generated ferric precipitation during bioleaching had a key in...