ieee 802.11e standard is proposed to support quality of service (qos) in wireless local area networks (wlans). the distributed access method of 802.11e, enhanced distributed channel access (edca), prioritizes traffic generated by delay-sensitive applications by increasing probability to access medium for this type of traffic. edca resets the contention window (cw) of mobile stations to a minimu...

Background: The mother, as the first and foremost person interacting with the child, suffers the most from the child’s speech disability. This study aimed to explore the lived experiences of mothers of children with speech disabilities. Methods: This qualitative study was conducted using a descriptive phenomenological approach and purposive sampling in Tehran Province-Iran in 2021. The data w...

background & aim : the number of cancer patients has been continuously increasing due to early diagnosis and the developments in cancer treatment. this has led to an increase in psychosocial problems associated with the diagnoses and treatment of cancer. loneliness is emphasized to be one of the most frequently observed psychological symptoms in cancer patients. personal and external factors th...

BACKGROUND Online peer support networks are a growing area of mental health support for offering social connection, identity, and support. However, it has been reported that not all individuals have a positive experience on such networks. The potential for adverse events within a moderated online peer support network is a new area of research exploration. OBJECTIVE The objective of the study ...

in various legal systems, with adoption of the validity of exclusion clause as a rule, in the exceptional instances for the reason of social importance of the matter and contrary to the public policy, exclusion clause is void. thus, in the case of death; bodily injuries; deliberated breach of contract or legal duty ;gross negligence and deception imputed to party relying to exclusion clause, it...

klinkenberg permeability is an important parameter in tight gas reservoirs. there are conventional methods for determining it, but these methods depend on core permeability. cores are few in number, but well logs are usually accessible for all wells and provide continuous information. in this regard, regression methods have been used to achieve reliable relations between log readings and klinke...

Due to the increase of users the efficient usage of spectrum plays an important role in digital terrestrial television networks. In digital video broadcasting, local and global content are transmitted by single frequency network and multifrequency network respectively. Multifrequency network support transmission of global content and it consumes large spectrum. Similarly local content are well ...

précis this debate article highlights the challenges of health situation in iran and some influencing or relevant factors such as health sector, welfare system and social protection, social exclusion and civil society from the viewpoint of an international partner. some advanced experiences in iranian health system and the manner of system for international cooperation have also been discussed.