Risk Factors for BK Virus Infection after Kidney Transplantation, London, Ontario 2016

Our objective was to determine the risk factors for BK virus infection in renal allograft recipients in the first year after transplantation. In this cohort, we included all patients who received renal allograft at London Health Sciences Centre (LHSC) between 2012 and 2014. We continued post-transplantation follow-up for one year. Of 175 patients (37% female) with median age (range) of 53 (14-82) years, 40 (22.9%) developed BK viremia (median interval:100 days, range: 35-264). Recipient age, recipient gender, hemodialysis (HD) vs peritoneal dialysis (PD), Human Leukocyte Antigens A1, B35 and Cw4 increased the risk of post-transplant BKV infection. However, donor gender, donor age, deceased vs living donor, delayed graft function, ABO incompatibility and retransplantation did not increase the risk. PD and HD patients do not appear to have equal risks at the time of transplantation. Further studies are required to determine the immunologic reasons for this difference

New bounds on the signed total domination number of graphs

In this paper, we study the signed total domination number in graphs and present new sharp lower and upper bounds for this parameter. For example by making use of the classic theorem of Turan, we present a sharp lower bound on this parameter for graphs with no complete graph of order r+1 as a subgraph. Also, we prove that n-2(s-s') is an upper bound on the signed total domination number of any tree of order n with s support vertices and s' support vertives of degree two. Moreover, we characterize all trees attainig this bound.Comment: This paper contains 11 pages and one figur

Religiosity and Cyberspace: a Meta-Analysis on the Studies of Religion and Cyberspace

This paper focuses on the impact of cyberspace on religiosity in Iran through reviewing previous studies. The situation of religion in the age of the internet has always been a major matter of concern for Iranian scholars and policy makers. Accordingly, there have been many researchers who have addressed and approached this problem but there has been no comprehensive understanding of the impact of the internet on religiosity, as no comparative study has been conducted to date. This paper applies meta-analysis as the method for reviewing previous attempts while trying to gather all the data by classifying problems, methods, theoretical approaches and more importantly their results. The outcome of this study is to indicate the impact of cyberspace on religiosity and religious identity, apart from classifying and clarifying the status of religiosity in Iran. Having a stronger religious identity causes less online misbehaviors like searching and engaging in pornography. It also indicates using cyberspace for recreational purposes compared to using it for communication or gathering information etc. makes the users more likely to have a weaker religious identity