objective(s):there is much evidence indicating that depression is influenced by the levels of neurotransmitters such as dopamine, gaba and adrenaline. the current study we designed to investigate the effect of exposure of pregnant rats to different colors on neurotransmitters level, as indicators of mood disorders in off springs. materials and methods:five groups of pregnant female wistar rats ...

In this paper, we introduce a new variation of list-colorings. For a graph G and for a given nonnegative integer t, a t-common list assignment of G is a mapping L which assigns each vertex v a set L(v) of colors such that given set of t colors belong to L(v) for every v ∈ V (G). The t-common list chromatic number of G denoted by cht(G) is defined as the minimum positive integer k such that ther...

Building façade colors play an important role in influencing urban imageability, attraction and citizens’ experience. However, the relations between street functions building color distribution, harmony diversity have not been thoroughly examined. We obtained dominant of façades Changning District, Shanghai, utilizing Baidu view images, image semantic segmentation technology K-means algorithm. ...

For a fixed integer m, we consider edge colorings of complete graphs which contain no properly edge colored cycle Cm as a subgraph. Within colorings free of these subgraphs, we establish a global structure by bounding the number of colors that can induce a spanning and connected subgraph. In the case of small cycles, namely C4, C5, and C6, we show that our bounds are sharp.

from bygone to now, colors are aspects of nature that have been regarded scientists. in ancient greece, essence of color and its relationship with light and vision in natural philosophy and especially optics has been studied. results of greek thinkers in the field chromatics, from pythagoras to aristotle through of translating scientific and philosophical texts, received to muslim scholars and ...

weirs have widely been used for the flow measurement, flow diversion and its control in the open channels. attempts have been made to study flow over different shapes of normal weirs, side weirs and oblique weirs. this paper is connected with the development of the discharge coefficient measurement. in the present study four different weirs in different height are considered for validation purp...

background and objectives: exposure to contaminated needlesticks and sharp devices is an important occupational hazard among healthcare workers. the objective of this study was to gain further insight into prevalence and risk factors of needlestick and sharps injuries among healthcare workers. methods: a cross-sectional survey was carried out among 384 healthcare workers of two hospitals in ne...

The constant development of digital technology has led to a sharp increase in the number and volume media files, including images, which make up significant part computer network traffic, reduces speed their transmission. research conducted this work is based on provisions methods image processing, laws visual perception, basics probability theory mathematical modeling. results theoretical were...