2,201 research outputs found
Use of waste oil/styrene-butadiene-rubber blends as rejuvenators for aged bitumen
No full textThis study elaborates the influence of blends formulated by waste oil (WO) and styrene-butadiene rubber (SBR) on thermo-mechanical and chemical compositional characteristics of rejuvenated bitumen. The results show that both WEO (waste engine oil) and WCO (waste cooking oil) can compensate viscous component for reclaimed bitumen, and the effect of WCO is more significant. However, WO-rejuvenated bitumen has considerable drawbacks in terms of temperature susceptibility and flow resistance, but dramatic improvement after being added with SBR has been noticed. Furthermore, the rejuvenation mechanism of WO/SBR blends is revealed by using FTIR tests, which shows that the physical blending mainly determines the rejuvenation mechanism when the WO/SBR blends are used in bitumen. The combination of WO and SBR is beneficial for improving the temperature susceptibility and rutting resistance of rejuvenated bitumen.Accepted Author ManuscriptPavement Engineerin
RESONANT TWO-PHOTON DETACHMENT OF WO
No full textAuthor Institution: Dept. of Chemistry, Indiana University, Bloomington, Indiana, 47405The resonant two-photon detachment spectrum of WO in the eV range exhibits at least two electronic transitions near the detachment continuum of WO. The states are assigned to valence-bound states of the anion, rather than dipole bound states, in part because the observed bending frequencies are considerably lower than those in the neutral. One band exhibits doublets, which is attributed to spin-orbit splitting in the two sub-states of a quartet anion state. A qualitative assignment of the spectrum is made based on comparison with the photoelectron spectrum of WO, as well as density functional theory calculations
Turbulence Modeling for Oscillatory Pipe Flow
No full textOscillating pipe flows, with zero mean velocity, are common in engineering systems and particularly in Stirling-based engines and heat pumps, e.g. pulse-tube cryogenic coolers. These flows are particularly challenging to model because their flow state depends on both the Reynolds number and the dimensionless frequency or Womerlsey number. A central challenge in modeling these systems is that the Reynolds number varies greatly within the cycle, often crossing from laminar to turbulent flow regimes. Indeed, flows that have super-critical Reynolds numbers may pass between states a total of four times; two laminar-turbulent transitions and two turbulent-laminar transitions. Contrary to a steady flow in which the transition between the laminar and the turbulent regimes is affected only by the Reynolds number, for oscillating flow the transition is affected by a combination of Reos and a dimensionless frequency-based number such as Womersley (Wo). The objective of this work is to develop and validate a computational method that solves the incompressible oscillating flow equations for different combinations of Reos and Wo
A process for the production of no-carrier added 99Mo
No full textAbstract of WO 2009148306 (A1) The present invention relates to a process for the production of no-carrier added 99Mo by neutron activation of 98Mo thereby reaching specific radioactivity which allow the use of such produced 99Mo as an option for the 99Mo produced by the fission of 235U. This has been achieved by taking advantage of the recoil of the 99Mo nuclei upon the capture of neutrons by the 98Mo containing compound. These recoiled nuclei are no longer chemically bound to the 98Mo containing compound allowing further specific separation. Preferred 98Mo containing compounds are molybdenum(0)hexacarbonyl [ (Mo (CO) 6] and molybdenum (VI ) di oxodioxinate [C4H3 (O) -NC5H3) J2-MoO2.Radiation, Radionuclides and ReactorsApplied Science
Automatic catheter positioning system
No full textAbstract of WO 2009148317 (A1) A system for positioning a distal end of a catheter (1) at a predetermined location within a passage, and for maintaining said distal end at the predetermined location, the system comprising: a position sensor (2) located at or near said distal end; location determining means for determining an actual location of said distal end of said catheter within the passage based on said position sensor,- difference determining means for determining a difference between the actual determined location of said distal end of said catheter and said predetermined location; an actuator attached (13) to said catheter for moving said catheter within the passage; controlling means for controlling said actuator; wherein, if said difference determining means determines a difference between the actual determined location of said catheter and said predetermined location, said controlling means controls said actuator to move said catheter to said predetermined location.Industrial Design Engineerin
Ι-E root *kyo-wo- or I-E. *kiH0-wo-, “in movement”, “to set in motion”
No full textДолжината на вокалот -ö- > во Гр. ssötron и episötron е толкувана како eden вид на редукција на дифтонгот -ou- (cf., traüima ~ tröma). Наше мислење е дека должината на вокалот -б- > во Гр. ssötron и episötron е резултат на процесот на пала- тализацијата од и.-е. *kiHo- > *kyö- > Гр. ssö-. Ha тоа упа- туваат паралелите, (cf.,u.-е. *gwiHo-wo- > *gwyöwos > Гр. zö(w)os, prosöpon od *protyölC- < u.-e.*proti-Hokw-). Od oeoj u.-e. корен *kiHo- > *kyö- ce микенските форми e-pi-zo-ta / epi-kjöta /: Гр. *epissötra, линните имиња zo-wa / kjöwa /: ïp. Sôë ; ra-wi- zo/Lawi-kjos/ > žp. *Lawi-ssos > *Lawoi-ssos > žp. Lao-ssos u a-no- zo-jo / Arno-kjoio /: *Arno-ssoio (gen.sg.) od *A-no-zo od arnos ‘eoba, ток ’ u -ssos ‘demtcehbe, придвижување ’.On the basis of the laryngeal theory, the author assumes that the I-E root *kyo-w-, “to set in motion,” derives from praeie. *kiHo-w-. The geminates ss- and the length of the vocal in -δ- in Gr. s(s)ötron and epi- ssôtron, that is, in the Mycenaean forms e-pi-zo-ta/ epi-kjota /: Gr. epi- ssötra, zo-wa/Kjo-wa/: Gr. S(s)öe result from the process of the palatalization of *CiHo->*Cyö- > Myc. kjö > Gr. *ssö, (cf. I-E *g"iHo-wo-> *g"yöwos > Gr. zö(w)os, Gr. prosöpon from *protyökм\u27 - < I-E *proti- Hot). The author believes that, through palatalization and hypheresis, the Mycenaean personal name ra-wi-zo/Lawi-kjos / > Gr. *Lawis-ssos> Gr. Lao-ssos and a-no-zo-jo/Arno-kjoio/:*Arno-ssoio (gen.sg) < *Arno- kjos (cf. arnos ‘water’) derived from I-E root *kiHo-wo-, “to set in motion”
METHOD AND APPARATUS FOR COMBUSTING A CARBONACEOUS MATERIAL
No full textAbstract of WO 9318341 (A1) A method and an apparatus are described for combusting carbonaceous materials in a two-stage process. In a first reaction chamber (2), operating under fuel-rich conditions in a bubbling fluidisation regime, fuel undergoes primary combustion or gasification. Oxidising gas (5) is fed into the first reaction chamber at a velocity sufficient to maintain fluidisation
REACTOR FILLED WITH CATALYST MATERIAL, AND CATALYST THEREFOR
No full textAbstract of WO 9521691 (A1) Described is a reactor (1) at least partially filled with catalyst granules (11), which is intended for catalytically reacting at least one gas and at least one liquid with each other. According to the invention the catalyst granules (11) are collected in agglomerates (20) with relatively small relative distances between the granules and relatively large distances between the agglomerate
METHOD FOR THE CATALYZED DECOMPOSITION OF ORGANIC HYDROPEROXIDES
No full textAbstract of WO 9408932 (A1) The invention relates to an improvement in carrying out a catalyzed decomposition of organic hydroperoxides. The improvement consists in the use of a heterogeneous catalyst which is composed of a three-dimensional microporous structure, a so-called molecular sieve, containing aluminum, silicon and/or phosphorus oxides and a metal (Me) catalyst incorporated into the lattice. This catalyst yields substantially no loss in use, so that a considerable saving is achieved and moreover detriment to the environment through metal waste is avoide
A METHOD OF APPLYING MOLECULAR SIEVE CRYSTALS TO A SUPPORT, AND A LOADED SUPPORT THUS OBTAINED
No full textAbstract of WO 9300155 (A1) A method of applying molecular sieve crystals to a support, wherein the surface of the support is brought into oxidic condition, whereafter the support is contacted with a solution of the molecular sieve-forming compound or compounds or precursors thereof, whereafter crystallization on the surface is effected
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