let $g=(v,e)$ be a connected simple graph. a labeling $f:v to z_2$ induces two edge labelings $f^+, f^*: e to z_2$ defined by $f^+(xy) = f(x)+f(y)$ and $f^*(xy) = f(x)f(y)$ for each $xy in e$. for $i in z_2$, let $v_f(i) = |f^{-1}(i)|$, $e_{f^+}(i) = |(f^{+})^{-1}(i)|$ and $e_{f^*}(i) = |(f^*)^{-1}(i)|$. a labeling $f$ is called friendly if $|v_f(1)-v_f(0)| le 1$. for a friendly labeling $f$ of...

As an intangible cultural heritage, Indonesian Batik continues to develop and is increasingly in demand by domestic foreign people. In the current era, concept of making batik that sustainable or more environmentally friendly has emerged, one efforts terms coloring uses natural dyes. This innovation produces softer colors aka soil colors, besides manufacturing process longer than using chemical...

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 ...

Color is a paramount factor that significantly influences the attractiveness of product. This study investigates impact colors on human perception and their subsequent attraction to different colors, ultimately leading product purchase decisions. The research methodology involved collection data from 406 customers in Saudi Arabia, utilizing convenience sampling approach coupled with correlation...

colors as a key element of emotional (sentimental) impacts and interaction with its surrounding, which is the most important visual factor, has had a great importance in the history of art and culture of iran for decades. this key element has shown its importance in several historical monuments and buildings. a large number of color theoreticians believe that colors affect the human beings’ spi...