The technical feasibility of roll motion control devices has been amply demonstrated for over 100 years. Performance, however, can still fall short of expectations because of difficulties associated with control system designs, which have proven to be far from trivial due to fundamental performance limitations and large variations of the spectral characteristics of wave-induced roll motion. Thi...

733 Abstract— This paper has studied subthreshold characteristics for double gate(DG) MOSFET using Gaussian function in solving Poisson's equation. Typical two dimensional analytical transport models have been presented for symmetrical Double Gate MOSFETs (DGMOSFETs). Subthreshold swing and threshold voltage are very important factors for digital devices because of determination of ON and OFF. ...

We address the so-called “roll-off” phenomenon: Selective abstention in multiple elections. We present a discuss a novel model of decision making by voters that explains this as a result of differences in quality and quantity of information that the voters have about each election. In doing so we use a spatial model that differs from the Euclidean one, and is more naturally applied to modelling...

We report a finding of spontaneous flow reversals of roll-like patterns in liquid gallium Rayleigh-Bénard convection. The vessel has a square geometry with an aspect ratio of 5, and a horizontal magnetic field is applied to align the rolls. The flow patterns were visualized by ultrasonic velocity measurements, and the processes of the reversal were clearly observed. The basic flow pattern obser...

Good tracking requires that the quintessence energy fraction slowly increase while the roll λ ≡ −d lnV/κdφ slowly decreases, but is not yet truly slow-rolling. The supernova bound on the present quintessence equation of state requires either (1) a cosmological constant or other finetuned ”crawling quintessence” or (2) ”roll-over quintessence” that tracked until recently, but now became slow rol...

OBJECTIVE The purpose of this systematic review was to evaluate the effectiveness of roll-over protection structures (ROPS) as an engineering control for prevention of fatalities from farm tractor roll-overs. METHODS Using a systematic approach to literature searching, relevant studies from peer-reviewed journals, technical and government reports, and unpublished reports were retrieved. Studi...

We derive slow-roll conditions for a scalar field which is non-minimally coupled with gravity in a consistent manner and express spectral indices of scalar/tensor perturbations in terms of the slow-roll parameters. The conformal invariance of the curvature perturbation is proved without linear approximations. Rapid-roll conditions are also derived, and the relation with the slow-roll conditions...

Interest in organic and polymer light-emitting devices (OLEDs and PLEDs) has exploded in recent years, in part because of the ability to create these devices on flexible plastic substrates. This is advantageous in producing wearable or lightweight displays, as well as utilizing low-cost roll-to-roll processing techniques. For the first time, we present crystalline refractory inorganic thin film...

Rights: © 2011 Elsevier BV. This is the post print version of the following article: Miettunen, Kati & Toivola, Minna & Hashmi, Ghufran & Salpakari, Jyri & Asghar, Imran & Lund, Peter. 2011. A carbon gel catalyst layer for the roll-to-roll production of dye solar cells. Carbon. Volume 49, Issue 2. 528-532. ISSN 0008-6223 (printed). DOI: 10.1016/j.carbon.2010.09.05 which has been published in fi...