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  • Articles  (53)
  • Energy, Environment Protection, Nuclear Power Engineering  (30)
  • Electrical Engineering, Measurement and Control Technology  (11)
  • Process Engineering, Biotechnology, Nutrition Technology  (9)
  • Linguistics and Literary Studies  (2)
  • Economics  (2)
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  • Articles  (53)
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  • 1
    Electronic Resource
    Electronic Resource
    Interferometry on diffuse surfaces in high-velocity measurements (1993)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 64 (1993), S. 2233-2236 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: An interferometer is presented which is capable of measuring the free-surface velocities and displacements of both specular and diffuse surfaces. The setup utilizes a previously used principle of producing a virtual image of one mirror at the same distance from the photodiode as the second mirror of the interferometer, albeit with considerable simplification. It is shown that use of a He–Ne laser of only 5-mW power can produce high contrast displacement fringes from surfaces of materials with nonuniform microstructure, including composites. Substrates of carbon–carbon composites and polycrystalline alumina with nonuniform microstructure on the scale of 5–10 μm, and with peak velocities up to 150 m/s were considered. An experimental strategy which allows one to covert the optical setup to either a velocity or a displacement interferometer is also discussed. It is further shown that use of a fast photodiode and a high-speed digitizer with a 5-ps rise time provides a time resolution of 0.2 ns for recording the displacement fringes, and allows measuring free surface velocities up to 800 m/s. This is demonstrated by measuring such transient surface velocities with rise times of 1 ns on a specular Si surface. In all the experiments reported here, the surface velocities were produced by the reflection of a stress wave, which in turn was generated on the back surface of the substrate, using a Nd:YAG laser pulse.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144452
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  • 2
    Electronic Resource
    Electronic Resource
    Nonintrusive rigid body tracking technique for dry particulate flows. Part II. Practical aspects and implementation (1998)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 69 (1998), S. 3606-3613 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A system, based on the principle of magnetic induction coupling, to track a particle nonintrusively in three dimensions is presented. It consists of small transmitters mounted inside the particle being tracked, and a set of receiving antennae surrounding the experimental apparatus. In Part I of the sequence of two papers, the focus is on the theoretical aspects, in particular, on developing a computational technique to solve the inverse problem of finding the three-dimensional position as well as orientation of the particle from the voltages induced in the antennae. In Part II the focus is on the actual system development, including all hardware and data acquisition aspects. The results presented here are comprehensive, as they include details of hardware/electronics, comparison of induced voltage model and actual measurements, and a set of actual tracking results. Through test experiments that include a variety of real-time trajectories, this system is tested and its success is demonstrated. Results of real trajectories of a single ball rising in a mass of other spheres in a vibrated bed are also shown. Although this system is intended for use in experimental studies of dry granular flows, it has wide applicability due to its nonintrusive nature, and is particularly useful when optical tracking techniques are not feasible. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1149146
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  • 3
    Electronic Resource
    Electronic Resource
    Science Policies in International Perspective: the experience of India and The Netherlands (1991)
    Oxford, UK : Blackwell Publishing Ltd
    R & D management 21 (1991), S. 0 
    Details
    ISSN: 1467-9310
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-9310.1991.tb00749.x
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  • 4
    Electronic Resource
    Electronic Resource
    A language model for very large-vocabulary speech recognition
    Amsterdam : Elsevier
    Computer Speech & Language 6 (1992), S. 331-344 
    Details
    ISSN: 0885-2308
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Linguistics and Literary Studies , Computer Science
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0885-2308(92)90027-2
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  • 5
    Electronic Resource
    Electronic Resource
    Use of minimum duration and energy contour for phonemes to improve large vocabulary isolated-word recognition
    Amsterdam : Elsevier
    Computer Speech & Language 6 (1992), S. 345-359 
    Details
    ISSN: 0885-2308
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Linguistics and Literary Studies , Computer Science
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0885-2308(92)90028-3
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  • 6
    Electronic Resource
    Electronic Resource
    A new spectrophotometric method for the determination of zinc in milk and standard samples (1991)
    Springer
    Water, air & soil pollution 57-58 (1991), S. 505-512 
    Details
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In the present communication a simple spectrophotometric method for the determination of Zn is described. The method is based on the reaction of Zn with the newly synthesized reagent o-carboxyphenyl-diazoaminoazobenzene in an alkaline medium where the reagent is in the aci-form. The complex exhibits an absorption maximum at 530 nm and Beer's law is valid over the concentration range of 0.0001 to 0.0008 mg mL−1. Various analytical parameeters for colour development have been studied. The method has been successfully applied for the determination of Zn in tap water, milk and standard Zn samples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00282914
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  • 7
    Electronic Resource
    Electronic Resource
    Kinetic parameters for the removal of lead and chromium from wastewater using activated carbon developed from fertilizer waste material (1996)
    Springer
    Environmental modeling and assessment 1 (1996), S. 281-290 
    Details
    ISSN: 1573-2967
    Keywords: Activated carbon ; lead ; chromium ; adsorption ; adsorbent ; wastewater treatment ; low cost adsorbent
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The waste slurry generated in fertilizer plants in India has been converted into a cheap carbonaceous adsorbent material. The prepared adsorbent has been characterised and used for the removal of lead and chromium metals. The kinetics of adsorption and the extent of adsorption at equilibrium are dependent on the physical and chemical characteristics of the adsorbate, adsorbent and experimental system. Results of laboratory scale studies conducted to delineate the effect of such parameters on the kinetics of adsorption of metal ions are reported. Parameters evaluated include: hydronium ion concentration, temperature, initial adsorbate concentration, size of adsorbent, and amount of adsorbent. On the basis of these studies the various physical parameters such as effective diffusion coefficient, activation energies and entropy of activation are evaluated, as these provide some information regarding the mechanistic aspects. Mass transfer coefficient values suggest a rapid transport of the adsorbate from bulk to solid phase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01872156
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  • 8
    Electronic Resource
    Electronic Resource
    Degradative transesterification of terephthalate polyesters to obtain DOTP plasticizer for flexible PVCOriginally presented at Davos Recycle '92, International Forum and Exposition, Davos, Switzerland, April 7-10, 1992. Organized by Maack Business Services, Plastics and Technology Marketing, Moosacherstrasse 14; CH-8804 Au/Zurich, Switzerland. (1993)
    Brookfield, Conn. : Wiley-Blackwell
    Journal of Vinyl and Additive Technology 15 (1993), S. 100-104 
    Details
    ISSN: 0193-7197
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Process Engineering, Biotechnology, Nutrition Technology
    Notes: It has been found that dioctyl terephthalate (DOTP), a plasticizer for polyvinyl chloride (PVC), can be made from scrap terephthalate polyesters such as polyethylene terephthalate (PET) by a method known as degradative transesterification. It is recognized that this plasticizer is as good as plasticizer as commercial DOTP, and that it may potentially replace dioctyl phthalate (DOP). The production of DOTP from scrap PET is shown to be cost effective. The use of this technology may provide a solution to a part of our solid-waste problem.
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/vnl.730150210
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  • 9
    Electronic Resource
    Electronic Resource
    Poly(vinyl chloride)/plasticizer-mixture interactions. Part I. Phthalate ester mixtures (1988)
    Brookfield, Conn. : Wiley-Blackwell
    Journal of Vinyl and Additive Technology 10 (1988), S. 72-76 
    Details
    ISSN: 0193-7197
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Flory-Huggins interaction parameters, χ, have been determined as a function of plasticizer composition for poly(vinyl chloride) in various binary mixtures of phthalate ester plasticizers using a method involving the micro-determination of the temperature at which PVC particles in excess plasticizer appear to melt. An optimum composition at which χ goes through a minimum was found to exist for some of the systems. A good correlation between the apparent melting temperature tm and χ for the neat plasticizers with PVC was also established.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/vnl.730100206
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  • 10
    Electronic Resource
    Electronic Resource
    Poly(Vinyl chloride)/plasticizer-mixture interactions - mixtures of various plasticizers of industrial importance (1989)
    Brookfield, Conn. : Wiley-Blackwell
    Journal of Vinyl and Additive Technology 11 (1989), S. 9-14 
    Details
    ISSN: 0193-7197
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The Flory-Huggins interaction parameter, x, has been determined as a function of plasticizer composition, φ2, for several ternary mixtures of poly(vinyl chloride) (PVC) and different pairs of plasticizers, selected mainly from the family of aliphatic esters. The method employed was the micro-determination of the apparent melting temperature of a PVC particle in excess plasticizer. In some systems X changed fairly gradually as a function of φ2, while other systems exhibited a pronounced minimum in the X - φ2 plots. Attention has been drawn to the similarity of this latter behavior to the well known co-solvency effect. The existence of such minima is of partical interest in plasticized PVC formulations.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/vnl.730110105
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