We characterize asymptotic collective behavior of rectangular random matrices, the sizes of which tend to infinity at different rates. It appears that one can compute the limits of all noncommutative moments (thus all spectral properties) of the random matrices we consider because, when embedded in a space of larger square matrices, independent rectangular random matrices are asymptotically fre...

background: the purpose of this study was to calculate and compare the specificity and sensitivity of impulse oscillometry (ios) as a new technique in the detection of airways dysfunction by means of a simple pulmonary function test in chemical warfare injured cases suffering from respiratory diseases.   methods: the study was performed prospectively in 100 patients, who complained of dyspnea a...

the link between allergic rhinitis and asthma is well known. bronchial hyperreactivity (bhr) may be present in rhinitis. the present study was aimed to compare airway responses in patients  with rhinitis symptoms alone following exercise challenge, and to  determine relationship of two different respiratory function tests. 98 subjects with rhinitis were investigated by spirometry and impulse os...

Purpose – The purpose of this research is to examine predictors of impulse buying. Although moderate levels of impulse buying can be pleasant and gratifying, recent theoretical work suggests that chronic, high frequency impulse buying has a compulsive element and can function as a form of escape from negative affective states, depression, and low self-esteem. Design/methodology/approach – The p...

In this paper, we connect rectangular free probability theory and spherical integrals. In this way, we prove the analogue, for rectangular or square non symmetric real matrices, of a result that Guionnet and Mäıda proved for symmetric matrices in [GM05]. More specifically, we study the limit, as n,m tend to infinity, of 1 n logE{exp[nmθXn]}, where Xn is an entry of UnMnVm, θ ∈ R, Mn is a certai...

to detection of suitable sampling method to study tree canopy cover in the northern zagros forest, baneeh region forest, kurdistan province, and west of iran was selected. 40 square sample plots one hectare (100×100 m) were selected and perfect inventoried. in every sample plot the position of tree, kind of species and two diameter of crown (m) were recorded. to study of canopy cover different ...