these days, due to growing the e-commerce sites, access to information about items is easier than past. but because of huge amount of information, we need new filtering techniques to find interested information faster and more accurate. therefore recommender systems (rs) introduced for solving this problem. although several recommender approaches have proposed, collaborative filtering (cf) appr...

The emergence and popularization of online social networks suddenly made available a large amount of data from social organization, interaction and human behavior. All this information opens new perspectives and challenges to the study of social systems, being of interest to many fields. Although most online social networks are recent (less than fifteen years old), a vast amount of scientific p...

juvenile delinquency can be considered as an important issue in the social sciences. also, the adolescents' leisure activities are important subjects which have been studied in the social sciences and humanities. this study assessed the relationship between leisure activities and delinquency among 610 male and female high school student in the city of shiraz. the questionnaire consists of two s...

AIMS Hansen's disease is endemic in Brazil and government control programmes promote publicity campaigns to increase the detection of new cases through the production and distribution of educative material. OBJECTIVES This study analyses a set of 276 educational materials produced by governmental and non-governmental organisations that work to control Hansen's disease in Brazil. It describes ...

social commerce, a new stream in e-commerce, enables hyper-informed consumers to support the businesses in new product development. hyper-informed consumers are the results of online communication provided by social media. these consumers have been empowered by web 2.0 technologies to have online communication, which drives value for the companies in new product development. trust is one the va...

The investigation of pedestrian spatio-temporal behaviour is of particular interest in many different research fields. Disciplines like travel behaviour research and tourism research, social sciences, artificial intelligence, geoinformation and many others have approached this subject from different perspectives. Depending on the particular research questions, various methods of data collection...

background: the increased recognition of ethical problems has contributed to the resurgence of ethics in relation to health care, and to the emergence of medical ethics as a new collaborative discipline in the world. the growing trends in biomedical technologies have been associated with increasing discussions about ethical aspects of the new knowledge in different societies. advances in geneti...