KOSMOS is a low-resolution, long-slit, optical spectrograph that has been upgraded at the University of Washington for its move from Kitt Peak National Observatory’s Mayall 4-m telescope to Apache Point ARC 3.5-m telescope. One additions slitviewer, which requires fabrication reflective slits, as previously used matte slits machined via wire electrical discharge machining. We explore an innovat...

High-density polyethylene is a high-strength, and low-weight material system. Besides numerous applications in variety of fields products, its machining for generation holes rather difficult with traditional methods such as drilling the process not very conducive composites due to associated damage. Hence, non-contact removal laser provides an appealing, cost-effective, accurate, fast alternati...

In this paper, we discuss two new paradigms for enabling costeffective III-V solar cell photovoltaics using (i) our novel layer transfer technology, called controlled spalling and (ii) new solar cell device structures. First, we present the application of the controlled spalling for making high-efficiency thin-film multijunction solar cells. Finally, a novel GaAs heterojunction solar cell struc...

This study presents an application of feedforward and backpropagation neural network (FFBP-NN) for predicting the kerf characteristics, i.e. width in three different distances from surface (upper, middle down) angle during laser cutting 4 mm PMMA (polymethyl methacrylate) thin plates. Stand-off distance (SoD: 7, 8 9 mm), speed (CS: 8, 13 18 mm/sec) power (LP: 82.5, 90 97.5 W) are studied parame...

As a continuation of [7], we introduce the notions of topological subalgebras, topological ideals and topological homomorphisms in topological BCI-algebras and study some related properties. In the section 3, we investigate the compactness in a TBCI-algebra X and quotient TBCI-algebra X=I where I is a topological ideal of X. In the section 4, we introduce the notion of topological homomorphisms...

Abstract In order to promote the development of environmental protection, and usage rate green energy utilization, a progressive, innovative laser process method employing helium assisted is proposed, which optimizes joint cutting under same consumption. This provides new idea for wood industry. The uniqueness this paper establishes mathematical model address diffusion injection heat transfer b...