Today’s research on concentrated photovoltaic (CPV) cells focuses creating multi-junction semiconductor solar capable of withstanding high temperatures without losing their properties. This paper investigated silicon low (LCPV) devices using Fresnel lenses. The parameters the CPV cell were measured to simulate its operation based a single-diode model with four and five parameters. most optimal ...

Whereas encryption schemes withstanding passive chosenplaintext attacks (CPA) can be constructed based on a variety of computational assumptions, only a few assumptions are known to imply the existence of encryption schemes withstanding adaptive chosen-ciphertext attacks (CCA2). Towards addressing this asymmetry, we consider a weakening of the CCA2 model — bounded CCA2-security — wherein securi...

In this paper we present a new method for coin identification. The proposed method adopts a hybrid scheme using Eigenvalues of covariance matrix, Circular Hough Transform (CHT) and Bresenham’s circle algorithm. The statistical and geometrical properties of the small and large Eigenvalues of the covariance matrix of a set of edge pixels over a connected region of support are explored for the pur...

Avocado plant (Persea americana), a plant belonging to the family of Lauraceae and genus, persea bears fruit known as avocado pear or alligator pear that contains the avocado pear seed. Reported uses of avocado pear seed include use in the management of hypertension, diabetes, cancer and inflammation [7-9]. The fruit is known as ube oyibo (loosely translated to ‘foreign pear’) in Ojoto and neig...

Bone cements are extensively employed in orthopaedics for joint arthroplasty, however implant failure in the form of aseptic loosening is known to occur after long-term use. The exact mechanism causing this is not well understood, however it is thought to arise from a combination of fatigue and chemical degradation resulting from the hostile in vivo environment. In this study, two commercial bo...

one of the most controversial aspects of financial markets is capital market liberalization of course not so liberalization under the rules of governmental severities. based on financial theories there are a number of reasons , that capital flows openness should lead to increases in economic growth. on the other hand most economists believe that the cost of openness outweigh the benefits , such...

using economic sanctions as an instrument to prevent proliferation of weapon of mass destruction in foreign policy is expanding today.to understand the role of nonproliferation of weapon of mass destruction in foreign policy of great powers and in imposing sanctions by security council particularly us and eu, bases of various literature structures especially study on international relations the...

Graphene is a very special material, since it has the advantage of being both conducting and transparent. The transparency of a material normally depends on its electronic properties and requires a band gap. Under normal conditions transparency and conductivity exclude each other, except for a few compounds like indium tin oxide (ITO). However, in contrast to ITO, graphene is also flexible and ...