Describing the Current-Voltage (I-V) characteristics that involves only one variable is the basic aim of this paper. A formula that describes the I-V characteristics is found based on the information gathered, and the values of I and P (Power) are determined according to different values of V. Afterwards, the natural cubic spline interpolation method is used to build a mathematical model that c...

A different approach to calculate the I-V characteristics of p+(Ga,Mn)As/n+GaAs spin injectors is presented. The vanishing of the spin-extraction transmission coefficients at the spin-split valence-band edges leads us to predict a dip or plateau in the I-V characteristics of this kind of diodes. We show that this minimum, or the inflection point, shifts with the exchange energy. Within this app...

a watching system in a graph $g=(v, e)$ is a set $w={omega_{1}, omega_{2}, cdots, omega_{k}}$, where $omega_{i}=(v_{i}, z_{i}), v_{i}in v$ and $z_{i}$ is a subset of closed neighborhood of $v_{i}$ such that the sets $l_{w}(v)={omega_{i}: vin omega_{i}}$ are non-empty and distinct, for any $vin v$. in this paper, we study the watching systems of line graph $k_{n}$ which is called triangular grap...

Very high conversion efficiency is reached with triple junction solar devices integrated in concentrator photovoltaic (CPV) modules. However, reduction of the active area for micro-CPV applications increases perimeter/area ratio, enhancing losses linked to edges. It therefore important characterize perimeter influence on final efficiency. For this purpose, I ( V ) characterization under dark an...

let g be a simple graph with vertex set v(g) {v1,v2 ,...vn} . for every vertex i v , ( ) i  vrepresents the degree of vertex i v . the h-th order of randić index, h r is defined as the sumof terms1 2 11( ), ( )... ( ) i i ih  v  v  vover all paths of length h contained (as sub graphs) in g . inthis paper , some bounds for higher randić index and a method for computing the higherrandic ind...