we denote by $ls[n](t,k,v)$ a large set of $t$-$(v,k,lambda)$ designs of size $n$, which is a partition of all  $k$-subsets ofa $v$-set into $n$ disjoint  $t$-$(v,k,lambda)$ designs and$n={v-t choose k-t}/lambda$.   we use the notation$n(t,v,k,lambda)$ as the maximum possible number of mutuallydisjoint cyclic $t$-$(v,k,lambda)$designs. in this paper we givesome new bounds for $n(2,29,4,3)$ and ...

abstract background histologically confirmed meningiomas in first year of life are quite rare. however, review of the sporadic cases in the literature reported meningioma in infants. those have unique features in common. case presentation an 11 month-old iranian male infant presented with a several weeks history of decrease in movement of his right sided upper and lower extremities. brain mri r...

The computational solution of large scale linear programming problems contains various difficulties. One of the difficulties is to ensure numerical stability. There is another difficulty of a different nature, namely the original data, contains errors as well. In this paper, we show that the effect of the random errors in the original data has a diminishing tendency for the optimal value as the...

we investigate the existence of some‎ ‎large sets of size nine‎. ‎the large set $ls[9](2,5,29)$ is constructed and‎ ‎existence of the family $ls[9](2,5,27l+j)$ for $lgeq 1, ‎2leq‎ ‎j

non-hodgkin lymphoma usually presents with generalized lymphadenopathy, but it can also involve any part of the human body. lymphomatous involvement of muscles is a rare presentation and has been reported to occur in only 1.1% in non-hodgkin lymphoma. here we, present a 32 year-old iranian man with primary involvement of spleen, bone, bone marrow and muscle, mimicking soft tissue sarcoma; core ...

here, we report on a ten-year-old girl with chronic draining nonhealing ulcer in her neck and unilateral cervical chronic lymphadenopathy. her ulcer had poor clinical response to broad spectrum antibiotics and anti-tuberculosis treatment. she had undergone several wound biopsies with no conclusive results. she was otherwise healthy with no known underlying disease. final wound excisional biopsy...

large vessel involvement is one of the hallmarks of behcet’s disease (bd) but its prevalence varies widely due to ethnic variation or environmental factors. the aim of this study is to find the characteristics of vasculo-behcet (vb) in iran. in a cohort of 4769 patients with bd, those with vascular involvement were selected. different manifestations of disease were compared with the remaining g...