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Selected Works

1994

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Full-Text Articles in Engineering

The Spectral Center Of Gravity Effect And Auditory Filter Bandwidth, Marc Fagelson, Linda M. Thibodeau Nov 1994

The Spectral Center Of Gravity Effect And Auditory Filter Bandwidth, Marc Fagelson, Linda M. Thibodeau

Marc A. Fagelson

The spectral center of gravity refers to a listener’s averaging of frequency and intensity components when formant peaks in a speechlike signal are separated by 3.5 Bark units or less. In this paper a total of 18 synthetic vowels whose spectra approximated /ae/ or /inverted vee/ were generated digitally; each stimulus contained the first 40 harmonics of a 100‐Hz fundamental. Nine spectra contained three formants, while the balance contained only two. Subjects with normal hearing and mild high‐frequency hearing loss above 3000 Hz were instructed to identify synthetic vowels as either /ae/ or /inverted vee/ as F2 frequency was …

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Obat Erogan Pembesar Penis Asli Di Kediri 082313333253 Alamat Jual Obat Erogan Di Kediri, Toko Aje Shop Nov 1994

Obat Erogan Pembesar Penis Asli Di Kediri 082313333253 Alamat Jual Obat Erogan Di Kediri, Toko Aje Shop

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Https://Wellnesstrials.Org/Shape-X2-Keto/, Ggfgo Dvhggf Nov 1994

Https://Wellnesstrials.Org/Shape-X2-Keto/, Ggfgo Dvhggf

Ggfgo Dvhggf


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Vital-Keto-1.Png, Ddfod Adfgfo Nov 1994

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Agen Minyak Lintah Papua Asli Di Bogor 082313333253 Minyak Pembesar Penis Di Bogor, Klinik 04 Oct 1994

Agen Minyak Lintah Papua Asli Di Bogor 082313333253 Minyak Pembesar Penis Di Bogor, Klinik 04

Distributor Resmi Minyak Lintah Papua Asli Original

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Reference Architecture For Machine Control Systems Integration: Interim Report, M Senehi, Thomas Kramer, John Michaloski, Richard Quintero, Steven Ray, William Rippey, Sarah Wallace Sep 1994

Reference Architecture For Machine Control Systems Integration: Interim Report, M Senehi, Thomas Kramer, John Michaloski, Richard Quintero, Steven Ray, William Rippey, Sarah Wallace

Steven R Ray

No abstract provided.

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The Treatment Of Depression With Group Behavioural-Cognitive Therapy And Imipramine., Glenn Gaudette, A Stravynski, R Verreault, R Langlois, S Gagnier, M Larose Aug 1994

The Treatment Of Depression With Group Behavioural-Cognitive Therapy And Imipramine., Glenn Gaudette, A Stravynski, R Verreault, R Langlois, S Gagnier, M Larose

Glenn R. Gaudette

Twenty-four outpatients meeting DSM-III-R criteria for major depression were assigned to group behavioral-cognitive therapy either with or without antidepressant medication (imipramine). Eighteen patients completed 15 weekly sessions of treatment. Equivalent improvement was observed in both regimens after treatment. The results essentially maintained at six months follow-up. This suggests that a group format of behavioural-cognitive therapy is a viable therapeutic intervention for outpatients diagnosed as suffering from major depression. However, the addition of imipramine to group behavioural-cognitive therapy did not enhance the outcome.

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Summary Report On R&D For Methane Process, Michael Prince Aug 1994

Summary Report On R&D For Methane Process, Michael Prince

Michael J. Prince

No abstract provided.

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Nucleation And Growth Of Molecular Crystals On Molecular Interfaces Role Of Chemical Functionality And Topography, Phillip W. Carter, Lynn M. Frostman, Andrew C. Hillier, Michael D. Ward Jun 1994

Nucleation And Growth Of Molecular Crystals On Molecular Interfaces Role Of Chemical Functionality And Topography, Phillip W. Carter, Lynn M. Frostman, Andrew C. Hillier, Michael D. Ward

Andrew C. Hillier

The nucleation and growth of molecular crystals at interfaces has been investigated in the context of nucleation rates, growth orientation, nanoscale growth modes, and the influence of topographic features on growth characteristics. For instance, real time imaging of crystal growth in solution using the atomic force microscope (AFM) reveals that the nanoscopic surface topography and molecular structure of the crystal-solution interface play an important role in the growth and dissolution characteristics of molecular crystals. This influence can be understood in terms of the strength and orientation of intermolecular bonding at the crystal-solution interfaces. Additionally, the well- defined structure exposed on …

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Accounting For The Stiffnesses Of The Probe And Sample In Scanning Probe Microscopy*, Nancy Burnham Apr 1994

Accounting For The Stiffnesses Of The Probe And Sample In Scanning Probe Microscopy*, Nancy Burnham

Nancy A. Burnham

The elements of a scanning probe microscope are modeled as a set of springs in series. For a single‐component sample, that is, a sample consisting of only one material, the detected feature height in variable force (force microscopy) or variable current (tunneling microscopy) modes is a function of the total system stiffness and the stiffness of the detector. For a multicomponent sample, the data in both variable force (current) and constant force (current) modes are modified by the set‐point force, the detector stiffness, and the relative stiffnesses of the components of the sample. A detection scheme for reducing this compliance …

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Jual Obat Aborsi Batam, Cytotec Pfizer Apr 1994

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Two Approaches In Scanner Printer Calibration: Colorimetric Space-Based Vs. Closed-Loop, V. Ostromoukhov, R.D. Hersh, C. Péraire, P. Emmel, I. Amidror Jan 1994

Two Approaches In Scanner Printer Calibration: Colorimetric Space-Based Vs. Closed-Loop, V. Ostromoukhov, R.D. Hersh, C. Péraire, P. Emmel, I. Amidror

Cécile Péraire

No abstract provided.

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A History Of Metallurgy, Fathi Habashi Jan 1994

A History Of Metallurgy, Fathi Habashi

Fathi Habashi

A collection of articles on the history of extractive metallurgy originally published in History of Technology between 1954 and 1958. The articles were edited and indexed to form a coherent textbook for educational purpose, with an introduction by the editor. 330 pages, 123 Figures. Table of Contents: 1. Introduction 2. From Early Times to the Fall of Ancient Empires 3. The Mediterranean Civilizations and the Middle Ages 4. From the Renaissance to the Industrial Revolution 5. The Industrial Revolution 6. The Late Nineteenth Century

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Click‐Evoked Otoacoustic Emissions In Normal‐Hearing Children, Jacek Smurzynski Jan 1994

Click‐Evoked Otoacoustic Emissions In Normal‐Hearing Children, Jacek Smurzynski

Jacek Smurzynski

Click‐evoked otoacoustic emissions (CEOEs) were collected from 167 ears of 106 normal‐hearing children using the ILO88 system with the stimuli presented at 80±2 dB pe SPL. Subjects were divided into five age groups: 13–24 months (24 ears), 25–36 months (49 ears), 37–48 months (31 ears), 49–60 months (34 ears), and 61–72 months (29 ears). All subjects had normal middle ear function and their audiological data were within normal limits. Mean overall CEOE level was calculated for each age group. None was statistically different from any other. However, the data of the 167 ears showed small but statistically significant decrease in …

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Multithreaded Computer Architecture: A Summary Of The State Of The Art, Robert Iannucci, Guang Gao, Robert Halstead, Burton Smith Dec 1993

Multithreaded Computer Architecture: A Summary Of The State Of The Art, Robert Iannucci, Guang Gao, Robert Halstead, Burton Smith

Robert A Iannucci

No abstract provided.

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Fire Information Resources In The Usda Forest Service, Julie Blankenburg Dec 1993

Fire Information Resources In The Usda Forest Service, Julie Blankenburg

Julie Blankenburg

Various branches of the Forest Service generate fire information, but no single location provides all publications related to this area. This report describes the kinds of fire research conducted by the Forest Service and access to research publications through the FS INFO database. Distribution centers for research stations, the Washington Office, the Forest Products Laboratory, and the Northeastern Area are also listed.

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Complexation Of Ionomers And Surfactant Molecules Of The Same Charge In A Nonpolar Solvent, William Macknight, Kirill N. Bakeev, Sergey A. Chugunov, Iwao Teraoka, Alexander B. Zezin, Victor A. Kabanov Dec 1993

Complexation Of Ionomers And Surfactant Molecules Of The Same Charge In A Nonpolar Solvent, William Macknight, Kirill N. Bakeev, Sergey A. Chugunov, Iwao Teraoka, Alexander B. Zezin, Victor A. Kabanov

William MacKnight

Complexation between sulfonated polystyrene ionomers and bis(2-ethylhexyl) sulfosuccinate
sodium salt (aerosol OT, AOT) surfactant molecules in m-xylene was studied by ultracentrifugation, vapor
pressure osmometry, viscometry, and dynamic light scattering. When the dilute ionomer solution is mixed
with the AOT soluti6n, complexation takes place for both the slightly aggregated state of AOT and reversed
micelles of AOT containing water. In the presence of excess AOT molecules, some of the AOT are free from
the ionomers, and there are well-defined limiting compositions for complexes of the ionomer and AOT and
for those of the ionomer and AOT micelles. The limiting composition depends …

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Dynamic Mechanical And Spectroscopic Study Of Ionomer Blends Based On Carboxylated Or Sulfonated Flexible Polystyrene And Rigid Poly(Diacetylenes) With Functional Side Groups, William Macknight, C. D. Eisenbach, J. Hofmann Dec 1993

Dynamic Mechanical And Spectroscopic Study Of Ionomer Blends Based On Carboxylated Or Sulfonated Flexible Polystyrene And Rigid Poly(Diacetylenes) With Functional Side Groups, William Macknight, C. D. Eisenbach, J. Hofmann

William MacKnight

The dynamic mechanical and infrared spectroscopic investigation of ionomer blends of poly-
(diacety1ene)-a nd polystyrene-based ionomers has shown that miscibility of this usually incompatible polymer
pair can be achieved through ion-ion interactions between the blend components. Microphase separation
is prevented through ionic contacts generated during the blend formation; a schematic model of mixing in
the blends is proposed.

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Compatibility Enhancement Of Blends Of Nylon 4 With Lithium-Neutralized Sulfonated Polystyrene, William Macknight, C. -W. Alice Ng, Michelle A. Bellinger Dec 1993

Compatibility Enhancement Of Blends Of Nylon 4 With Lithium-Neutralized Sulfonated Polystyrene, William Macknight, C. -W. Alice Ng, Michelle A. Bellinger

William MacKnight

No abstract provided.

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Blends Of Amorphous-Crystalline Block Copolymers With Amorphous Homopolymers. 2. Synthesis And Characterization Of Poly(Ethylene-Propylene) Diblock Copolymer And Crystallization Kinetics For The Blend With Atactic Polypropylene, William Macknight, Kazuo Sakurai, David J. Lohse, Donald N. Schulz, J.A. Sissano Dec 1993

Blends Of Amorphous-Crystalline Block Copolymers With Amorphous Homopolymers. 2. Synthesis And Characterization Of Poly(Ethylene-Propylene) Diblock Copolymer And Crystallization Kinetics For The Blend With Atactic Polypropylene, William Macknight, Kazuo Sakurai, David J. Lohse, Donald N. Schulz, J.A. Sissano

William MacKnight

No abstract provided.

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Application Of A Molecular Simulation Technique For Prediction Of Phase-Separated Structures Of Semirigrid Model Polyurethanes, William Macknight, Hun-Jan Tao, Cun F. Fan, Shaw L. Hsu Dec 1993

Application Of A Molecular Simulation Technique For Prediction Of Phase-Separated Structures Of Semirigrid Model Polyurethanes, William Macknight, Hun-Jan Tao, Cun F. Fan, Shaw L. Hsu

William MacKnight

A combination of a molecular simulation method and the Monte Carlo method has been
succe88fully utilizedto calculate phase diagrams of model polyurethanes. In our model, the entropic contribution
of the Flory-Huggins expression has been modified to incorporate the contribution arising from orientation
of hard segments. The constraint associated with chain rigidity of hard segments has been explicitly considered.
In addition, the interaction term has been modified to include the relative packing of hard segments. Phase
diagrams of various MDI-PPG model polyurethanes have thus been predicted utihhg these modifications.
The effecta of soft- and hard-segment lengths have been considered and the …

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Phase Behavior In Copolymer Blends Of Poly(P-Chlorostyrene-Co-O-Chlorostyrene) And Phenylsulfonylated Poly(2,6-Dimethyl-1,4-Phenylene Oxide), William Macknight, R. Vukovic, G. Bogdanic, Vjera Kuresevic, M. Tomaskovic, F. E. Karasz Dec 1993

Phase Behavior In Copolymer Blends Of Poly(P-Chlorostyrene-Co-O-Chlorostyrene) And Phenylsulfonylated Poly(2,6-Dimethyl-1,4-Phenylene Oxide), William Macknight, R. Vukovic, G. Bogdanic, Vjera Kuresevic, M. Tomaskovic, F. E. Karasz

William MacKnight

The miscibility of random copolymers of o-chlorostyrene and p -chlorostyrene [ P (oC1Stco-
pC1St)] with partially phenylsulfonylated poly (2,6-dimethyl-1,4-phenylenoex ide)
( SPPO) copolymers has been studied, using differential scanning calorimetry (DSC) to
establish Tg behavior. It already has been established that the isomeric effect of the chlorine
substitution on miscibility is large. Thus the para-chloro-substituted styrenic homopolymer
is miscible with all SPPOs containing more than - 5 mol % phenylsulfonylation, whereas
the ortho-chloro-substituted homopolymer is immiscible with the entire range of SPPO
copolymer compositions (and also with the respective homopolymers) . As a result of this
asymmetric behavior of the …

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Structure And Morphology Of Nylon 4 Chain-Folded Lamellar Crystals, William Macknight, M. A. Bellinger, Alan J. Waddon, E. D. T. Atkins Dec 1993

Structure And Morphology Of Nylon 4 Chain-Folded Lamellar Crystals, William Macknight, M. A. Bellinger, Alan J. Waddon, E. D. T. Atkins

William MacKnight

No abstract provided.

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Thermal Degradation Of Segmented Polyurethanes, William Macknight, Zoran S. Petrovic, Zoltan Zavargo, Joseph H. Flynn Dec 1993

Thermal Degradation Of Segmented Polyurethanes, William Macknight, Zoran S. Petrovic, Zoltan Zavargo, Joseph H. Flynn

William MacKnight

Thermal degradation of polyurethane samples was studied by a thermogravimetric method. The effect of soft-segment length and soft-segment concentration on activation energy of the degradation process was measured. Three methods of calculation gave activation energies at different stages of the very complex weight loss process. It was shown that at initial stages of the weight loss the process was dominated by hard-segment degradation. Activation energy of the whole process calculated by the Ozawa-Flynn method did not offer clear insight into the structure-stability relationship of polyurethanes. The second method showed that activation energy of the initial stage of degradation increased with …

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Viscoelastic And Morphological Study Of Ionic Aggregates In Ionomers And Ionomer Blends, William Macknight, Elliot P. Douglas, Alan J. Waddon Dec 1993

Viscoelastic And Morphological Study Of Ionic Aggregates In Ionomers And Ionomer Blends, William Macknight, Elliot P. Douglas, Alan J. Waddon

William MacKnight

No abstract provided.

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Nanoscale Surface Topography And Growth Of Molecular Crystals: The Role Of Anisotropic Intermolecular Bonding, Phillip W. Carter, Andrew C. Hillier, Michael D. Ward Dec 1993

Nanoscale Surface Topography And Growth Of Molecular Crystals: The Role Of Anisotropic Intermolecular Bonding, Phillip W. Carter, Andrew C. Hillier, Michael D. Ward

Andrew C. Hillier

Atomic force microscopy (AFM) and phase measurement interferometric microscopy (PMIM) of the molecular crystals a-glycine and (TMTSF)2C104 (TMTSF = tetramethyltetraselenafulvalene) reveal that crystal topography, growth, and etching reflect the relative strengths of solid state intermolecular bonding. The (OlO), (110), and (01 1) faces of a-glycine exhibit terraces, ledges, and kinks that can be interpreted on the basis of intermolecular hydrogen bonding in these planes. A strong preference for [ 1001 ledges on the (001) face of (TMTSF)zC104 is a consequence of strong intermolecular charge transfer interactions between TMTSF molecules stacked along this direction. Dynamic in situ measurements of growth and …

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Electrocrystallization Of An Ordered Organic Monolayer: Selective Epitaxial Growth Of B-(Et)213 On Graphite, Andrew C. Hillier, Jeffrey B. Maxson, Michael D. Ward Dec 1993

Electrocrystallization Of An Ordered Organic Monolayer: Selective Epitaxial Growth Of B-(Et)213 On Graphite, Andrew C. Hillier, Jeffrey B. Maxson, Michael D. Ward

Andrew C. Hillier

The fabrication of highly ordered organic thin films has received considerable attention in attempts to develop materials for molecular-based electronic devices, sensors, displays, and logic e1ements.l Examples of twodimensional films with potentially desirable electronic properties include self-assembled mono- and multilayers with redox-active components2 and thin films of organic dyes grown by molecular beam epitaxy on van der Waals substrates such as graphite, MoS2, and SnSza3 Successful approaches to the manufacturing of devices based on organic thin films will ultimately rely on the development of convenient fabrication methods as well as rigorous control of the supramolecular structure of the thin-film assembly.

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Convective Fuel Droplet Burning Accompanied By An, Wei-Hsin Chen Dec 1993

Convective Fuel Droplet Burning Accompanied By An, Wei-Hsin Chen

Wei-Hsin Chen

No abstract provided.

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Double Flame And Multiple Solution Computations For A, Wei-Hsin Chen Dec 1993

Double Flame And Multiple Solution Computations For A, Wei-Hsin Chen

Wei-Hsin Chen

No abstract provided.

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