fertility in the male is dependent on the proper production of sperm cells. this process, called spermatogenesis is very complex and involves the synchronization of numerous factors. the presence of pro–inflammatory cytokines, tumor necrosis factor-alpha (tnf–α), interleukin–1 alpha (il–1 α) and interleukin 1 beta (il–1 β) cytokines in the male reproductive tract (testis, epididymis and sperm) ...

www.thoracic.org C LI P A N D C O P Y The harmful effects of tobacco smoke are well known, but we have less information about the health effects of marijuana. Few research studies have been done since marijuana remains illegal in most countries, and since marijuana can be inhaled in many ways (e.g. water pipes, joints, vaping etc). It is likely that in frequent users (and some less frequent use...

cold start is one of the main challenges in recommender systems. solving sparsechallenge of cold start users is hard. more cold start users and items are new. sine many general methods for recommender systems has over fittingon cold start users and items, so recommendation to new users and items is important and hard duty. in this work to overcome sparse problem, we present a new method for rec...

We thank the author of the editorial comment for the thoughtful remarks on our study. Research on the effects of pornography is still in its infancy. Despite strong social pressure for rapid closure, we should be cautious before concluding that pornography use is universally harmful or beneficial. Our contribution shows that subgroups of pornography users report differential sexual outcomes. Mo...

E-mail spam is a very serious problem in today’s life. It has many conséquences like it causes lower productivity, occupy space in mail boxes, extend viruses, Trojans, and materials containing potentially harmful information for a certain category of users, Destroy stability of mail servers, and as a result users spend a lot of time for sorting incoming mail and deleting undesirable corresponde...