in order to evaluate the yield, yield components and protein contents of two wheat cultivars (zarrin and gaspard) in sole cropping and intercropping systems,an experiment was conducted using replacement serious technique and different combinations of intercropping with high plant density and optimal of each cultivar. a factorial experiment was conducted in the form of randomized complete block ...

noise is a common and widespread problem in workplaces. noise can lead to hearing loss, hypertension, nervous and mental disorders, annoyance and stress, sleep disturbance, negative impact on productivity and working capacity. the undesirable effects of noise on an individual or group are called annoyance. some personal and social characteristics can affect on annoyance. this study was aimed to...

Mendelsohn and Liang, in J. Combin. Des. 11 (2003), introduced a new class of difference sets and designs: (v, k, [λ1, λ2, . . . , λm])-difference sets and (v, k, [λ1, λ2, . . . , λm])-designs, and mainly discussed designs with a relationship called λ-equivalence. In this paper, we introduce the concepts of a doubly equivalent design as well as a super class. We describe the structure of super ...

An equivalence between a class of (current conveyor) CC II+ and CC IIcircuits is established. CC IIequivalent circuit uses one extra element. However, under certain condition, the extra element can be eliminated. As an illustration of the application of this equivalence, minimal first and second order all-pass filters are derived. In certain cases, it is possible to compensate the effect of the...