Let F be a field. We shall let W(F) denote the Wit t ring of equivalence classes of nondegenerate symmetric bilinear forms over F. There are many questions one migh t ask about the extent to which one can prescribe the Wit t ring of an extension field of F and the natural homomorphism between these Wit t rings induced by the field inclusion. In this note we consider a formally real field F and ...

This paper proposes a novel transmission policy for wireless powered sensor network (WPSN) assisted by an intelligent reflecting surface (IRS) to enhance the performance of energy transfer (WET) and information (WIT) with certain phase shifts. To achieve its self-sustainability, IRS collects from station support own control circuit operation. Our proposed considered WPSN is called harvest-then-...

Abstract Wetlands around the world provide crucial ecosystem services and are under increasing pressure from multiple sources including climate change, changing flow flooding regimes, encroaching human populations. The Landsat satellite imagery archive provides a unique observational record of how wetlands have responded to these impacts during last three decades. Information stored within this...

PURPOSE To present an autonomous intraocular pressure (IOP) measurement technique using a wireless implantable transducer (WIT) and a motion sensor. METHODS The WIT optical aid was implanted within the ciliary sulcus of a normotensive rabbit eye after extracapsular clear lens extraction. An autonomous wireless data system (AWDS) comprising of a WIT and an external antenna aided by a motion se...

Background and Objectives The learning curve for achieving desirable perioperative outcomes in robot-assisted partial nephrectomy (RAPN) has not been well studied. Information is available regarding "trifecta" outcomes of no complications, no positive margins, warm ischemia time (WIT) of ≤25 minutes, and a ≤15% decrease in postoperative glomerular filtration rate (GFR). This study was conducted...

The bounded arithmetic theories Ri 2, S i 2, and T i 2 are closely connected with complexity theory. This paper is motivated by the questions: what are the Σi+1-definable multifunctions of R i 2? and when is one theory conservative over another? To answer these questions we consider theories R̂i 2, Ŝ i 2, and T̂ i 2 where induction is restricted to prenex formulas. We also define T̂ i,τ 2 which ha...