We defined the Grothendieck groups KX and K0X. They are vector bundles, respectively coherent sheaves, modulo the relation [E] = [E ] + [E ]. We have a pullback on K: f : KX → KY. KX is a ring: [E] · [F] = [E ⊗ F]. We have a pushforward on K0: f∗[F ] = ∑ i≥0(−1) [Rf∗F ]. We obviously have a homomorphism KX → K0X. K0X is aK X-module: KX⊗K0X → X is given by [E] · [F ] = [E⊗ F ]. Unproved fact: If...

In this paper, a radially piezoelectric functionally graded rotating disk is investigated by the analytical solution. The variation of material properties is assumed to follow a power law along the radial direction of the disk. Two resulting fully coupled differential equations in terms of the displacement and electric potential are solved directly. Numerical results for different profiles of i...

A novel fully differential difference CMOS potentiostat suitable for neurotransmitter sensing is presented. The described architecture relies on a fully differential difference amplifier (FDDA) circuit to detect a wide range of reduction-oxidation currents, while exhibiting low-power consumption and low-noise operation. This is made possible thanks to the fully differential feature of the FDDA,...

The Delaunay Tree is a hierarchical data structure that has been introduced in [7] and analyzed in [6, 4]. For a given set of sites S in the plane and an order of insertion for these sites, the Delaunay Tree stores all the successive Delaunay triangulations. As proved before, the Delaunay Tree allows the insertion of a site in logarithmic expected time and linear expected space, when the insert...

SUMMARY From April L 989 to March 1989 !here were 13 patients with small intestinal volvulus 23%, or all palients operated for small intestinal obstruction.All were male, age between 6 to 75, without any history of abdominal operation. Mortality was 38, 5% and morbidity included, intraabdominal abscesses, recurrent obstruction and wound infection were observed. Being the 3rd cause of intestin...

Received Jan 2, 2017 Revised Mar 2, 2017 Accepted Mar 16, 2017 This paper relates the new topology and simulations of a fully differential CMOS active filter for mm wave band applications. The advantages of the differential topology over the single ended one are discussed and the quality factor is tuned to insure application requirements, including narrow bandwidth and high selectivity due to a...

A high-speed fully differential current switch is presented. The clock-feedthrough effect is reduced by Swing-Reduced Drivers and neutralized by dummy transistors. With the use of Swing-Reduced Drivers (SRD), less charges are required to be transferred to/from the gates of the switching transistors, and hence, the switching speed can be increased without significant output error. The SRDs also ...