In this paper, data of almost 8 million loans of books recorded for 15 years by the Korea University Library are analyzed by using big data analytic techniques.During this period, book circulation decreased with an average annual rate of decline of 4.4%.The use factor of books in each Dewey decimal classification (DDC) class was evaluated to measur
One of the main stirrup extender western directions of engineering technology development at present is the improvement of existing and the development of new waste-free, environmentally friendly, material-saving production processes.Powder metallurgy is a branch of technology, including the manufacture of powders from metals and their alloys and t
Abstract Background The microbial community composition of urban environments is primarily determined by human activity.The use of metagenomics to explore how microbial communities are shaped in a city provides a novel input that can improve decisions on public health measures, architectural design, and urban resilience.Of note, the sewage system i
According to the European Community Regulation 1139/2003, a sampling plan based on an appropriate tests to detect the presence of central nervous system (CNS) tissue on the surface of the head muscles had to be implemented in each member state starting from 2003.In previous studies, we showed a medium CNS contamination in head meat secchia stadium