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Articles 1 - 30 of 108
Full-Text Articles in Engineering
Fuzzy Logic Applied To Adaptive Kalman Filtering, Marlys Rae Remus
Fuzzy Logic Applied To Adaptive Kalman Filtering, Marlys Rae Remus
Department of Electrical and Computer Engineering: Dissertations, Theses, and Student Research
The Kalman filter provides an effective means of estimating the state of a system from noisy measurements given that the system parameters are completely specified. The innovations sequence for a properly specified Kalman filter will be a zero-mean white noise process. However, when the system parameters change with time the Kalman filter will need to be adapted to compensate for the changes. Traditionally this has been accomplished by using nonlinear filtering, parallel Kalman filtering and covariance matching techniques. These methods have produced good results at the expense of large amounts of computational time. Necessary changes in the system parameters become …
High-Level Expression Of A Heterologous Protein In The Milk Of Transgenic Swine Using The Cdna Encoding Human Protein C, William H. Velander, John L. Johnson, Raymond L. Page, Christopher G. Russell, Anuradha Subramanian, Tracy D. Wilkins, Francis C. Gwazdauskas, Christoph Pittius, William N. Drohan
High-Level Expression Of A Heterologous Protein In The Milk Of Transgenic Swine Using The Cdna Encoding Human Protein C, William H. Velander, John L. Johnson, Raymond L. Page, Christopher G. Russell, Anuradha Subramanian, Tracy D. Wilkins, Francis C. Gwazdauskas, Christoph Pittius, William N. Drohan
William H. Velander Publications
Transgenic pigs were generated that produced human protein C in their milk at up to 1 g/liter. The gene construct was a fusion gene consisting of the cDNA for human protein C inserted into the first exon of the mouse whey acidic protein gene. These results demonstrate that the mouse whey acidic protein gene contains regulatory elements that can direct cDNA expression at high levels in the pig mammary gland. Recombinant human protein C that was produced at about 380 pg/ml per hr in transgenic pig milk possessed anticoagulant activity that was equivalent to that of protein C derived from …
Acuta Enews December 1992, Vol. 21, No. 12
Acuta Enews December 1992, Vol. 21, No. 12
ACUTA Newsletters
In This Issue
Regulatory update
President's column
Dual routing protects Duke
Talking clock "tells" time
Seminar ratings
Director's column
Viscosities Of Vegetable Oils And Fatty Acids, Hossein Noureddini, B C. Teoh, L Davis Clements
Viscosities Of Vegetable Oils And Fatty Acids, Hossein Noureddini, B C. Teoh, L Davis Clements
Papers in Biomaterials
Data for viscosity as a function of temperature from 24 to llO°C (75 to 230°F) have been measured for a number of vegetable oils (crambe, rapeseed, corn, soybean, milk- coconut, lesquerella) and eight fatty acids in the from Cg to CZZ The viscosity measurements were performed according to ASTM test methods D 445 and D 446. Several correlations were fitted to the experimental data. Correlation constants for the best fit are presented. The range of temperature in which the correlations are valid is from 24'C (75'F), or the melting point of the substance, to llO°C (230°F). The correlation constants are …
Densities Of Vegetable Oils And Fatty Acids, Hossein Noureddini, B C. Teoh, L Davis Clements
Densities Of Vegetable Oils And Fatty Acids, Hossein Noureddini, B C. Teoh, L Davis Clements
Papers in Biomaterials
Complete data for density as a function of temperature have been measured for a number of vegetable oils (cramhe, rapeseed, corn, soybean, milkweed, coconut, lesquerella), as well as eight fatty acids in the range CS to C,, at temperatures from above their melting points to llQ°C (23Q°F). The specific gravity and density measure mente were performed according to American Society for Testing and Materials (ASTM) standard test methods D 368, D 891 and D 1298 for hydrometers and a modified ASTM D 369 and D 891 for pycnometers. Correlation constants, based on the experimental data, are presented for calculating the …
High-Level Expression Of A Heterologous Protein In The Milk Of Transgenic Swine Using The Cdna Encoding Human Protein C, William H. Velander, John L. Johnson, Raymond L. Page, Chritopher G. Russell, Anuradha Subramanian, Tracy D. Wilkins, Francis C. Gwazdauskas, Christoph Pittus, William N. Drohan
High-Level Expression Of A Heterologous Protein In The Milk Of Transgenic Swine Using The Cdna Encoding Human Protein C, William H. Velander, John L. Johnson, Raymond L. Page, Chritopher G. Russell, Anuradha Subramanian, Tracy D. Wilkins, Francis C. Gwazdauskas, Christoph Pittus, William N. Drohan
Papers in Biotechnology
Transgenic pigs were generated that produced human protein C in their milk at up to 1 g/liter. The gene construct was a fusion gene consisting of the cDNA for human protein C inserted into the first exon of the mouse whey acidic protein gene. These results demonstrate that the mouse whey acidic protein gene contains regulatory elements that can direct cDNA expression at high levels in the pig mammary gland. Recombinant human protein C that was produced at about 380 pg/ml per hr in transgenic pig milk possessed anticoagulant activity that was equivalent to that of protein C derived from …
Sediment Delivery On Rill And Interrill Areas, John E. Gilley, D. C. Kincaid, W. J. Elliot, J. M. Laflen
Sediment Delivery On Rill And Interrill Areas, John E. Gilley, D. C. Kincaid, W. J. Elliot, J. M. Laflen
Biological Systems Engineering: Papers and Publications
Equations which relate sediment delivery to a power function of flow rate and slope gradient were calculated in this study. The data used to parameterize the calculations were obtained from sites where crop residues had been removed. and moldboard plowing and disking had occurred. Measurements of sediment delivery resulting from simulated rainfall were obtained from preformed rills and interrill areas. The equations provided reliable sediment delivery estimates for selected soils located throughout the United States. To use the sediment delivery equations, soil-related parameter values must be identified. Multiple regression analyses were performed to relate parameter values used in the equations …
Acuta Enews November 1992, Vol. 21, No. 11
Acuta Enews November 1992, Vol. 21, No. 11
ACUTA Newsletters
In This Issue
Interchangeable NPA, NNX
President's Message
Permanent 800 numbers
Industry/ Regulatory updates
Making voice mail effective
The fax-on-demand solution
Simulated Crystalline Structures Of Aromatic Polyimides, Tze Wing Poon, B. David Silverman, Ravi F. Saraf, Angelo R. Rossi, Paul S. Ho
Simulated Crystalline Structures Of Aromatic Polyimides, Tze Wing Poon, B. David Silverman, Ravi F. Saraf, Angelo R. Rossi, Paul S. Ho
Ravi Saraf Publications
Semicrystalline structures involving molecular packing and optimized chain conformations of three polyimides have been obtained with the CHARMM moleculardynamics program, and their densities calculated. An eclipsed conformation of face-toface stacking of polymer chains with a relative shift is observed, and the shift is found to depend upon the molecular characteristics of the planar unit and chain linearity. Threedimensional structures obtained by calculating the optimized edge-on confirmation of the stacked units yield the smallest calculated density for PMDA-ODA, namely 1.515 g/cm3, followed by BPDA-PDA with 1.644 g/cm3 and PMDA-PDA with 1.712 g/cm3. Both PMDA-ODA and BPDA-PDA …
Acuta Enews October 1992, Vol. 21, No. 10
Acuta Enews October 1992, Vol. 21, No. 10
ACUTA Newsletters
In This Issue
CMSU testing VISIT
President's message
A telecom intern's report
Annual ACUTA budget
Answers from "Regional Feud"
Membership Director's report
Notice Of Meetings For Museum Committee In 1992, Tractor Museum
Notice Of Meetings For Museum Committee In 1992, Tractor Museum
Lester F. Larsen Tractor Museum: Planning and Development Documents
No abstract provided.
Acuta Enews Septmber 1992, Vol. 21, No. 9
Acuta Enews Septmber 1992, Vol. 21, No. 9
ACUTA Newsletters
In This Issue
Merging technologies to compete
President's column
Award, election winners
Innovation spurs productivity
Conference evaluations
Welcome to new members
An Optical Technique For Measurement Of Semiconductor Surface Electric Fields, Harshad P. Sardesai, William C. Nunnally
An Optical Technique For Measurement Of Semiconductor Surface Electric Fields, Harshad P. Sardesai, William C. Nunnally
P. F. (Paul Frazer) Williams Publications
We present an optical technique for the measurement of semiconductor surface electric fields. The measurement technique uses the Kerr electro-optic effect in nitrobenzene, a phase sensitive interferometer, and associated data acquisition units to measure the surface electric fields between the contacts of a planar semiconductor device. This technique was used to measure the surface fields on silicon devices used in pulsed power applications, but has the potential for use as an electric field probe for any device having high surface electric fields, both pulsed and dc. The measurement technique showed a temporal resolution of 100 ns, which can be easily …
Acuta Enews August 1992, Vol. 21, No. 8
Acuta Enews August 1992, Vol. 21, No. 8
ACUTA Newsletters
In This Issue
FCC gives nod to touch-tone video
President's column
West Chester starting student resale
Security at Yale
ACUTA Calender
Phone taps snare hackers
Modeling Of A-Si : H Deposition In A Dc Glow Discharge Reactor, Dariusz Orlicki, Vladimir Hlavacek, Hendrik J. Viljoen
Modeling Of A-Si : H Deposition In A Dc Glow Discharge Reactor, Dariusz Orlicki, Vladimir Hlavacek, Hendrik J. Viljoen
Papers in Reaction Kinetics
PECVD reactors are increasingly used for the manufacturing of electronic components. This paper presents a reactor model for the deposition of amorphous hydrogenated silicon in a dc glow discharge of Ar-SiH4 The parallel-plate configuration is used in this study. Electron and positive ion densities have been calculated in a self-consistent way. A macroscopic description that is based on the Boltzmann equation with forwardscattering is used to calculate the ionization rate. The dissociation rate constant of SiH4 requires knowledge about the electron energy distribution function. Maxwell and Druyvesteyn distributions are compared and the numerical results show that the deposition …
Solutions Of The Heat Conduction Equation In Multilayers For Photothermal Deflection Experiments, William A. Mcgahan, Kevin D. Cole
Solutions Of The Heat Conduction Equation In Multilayers For Photothermal Deflection Experiments, William A. Mcgahan, Kevin D. Cole
Department of Mechanical and Materials Engineering: Faculty Publications
Exact expressions are presented for the deflection of a laser beam passing parallel to and above the surface of a sample heated by a periodically modulated axisymmetric laser beam. The sample may consist of any number of planar films on a thick substrate. These exact expressions are derived from a local Green’s function treatment of the heat conduction equation, and contain an exact analytical treatment of the absorption of energy in the multilayered system from the heating laser. The method is based on calculation of the normal component of the heat fluxes across the layer boundaries, from which either the …
Beginning Of Motion For Selected Unanchored Residue Materials, John E. Gilley, Eugene R. Kottwitz
Beginning Of Motion For Selected Unanchored Residue Materials, John E. Gilley, Eugene R. Kottwitz
Biological Systems Engineering: Papers and Publications
Conservation tillage systems help to maintain residue materials from the previous crop on the soil surface. The potential for serious erosion may exist if crop residues are removed by overland flow. This study is conducted to identify the hydraulic conditions required to initiate residue movement by overland flow. Corn, cotton, peanut, pine needles, sorghum, sunflower, and wheat residue are placed in a flume on smooth and sand surfaces, and flow is then introduced in progressive increments. The discharge rate and flow velocity required to initiate residue movement are identified. Hydraulic measurements are used to calculate the ratio of critical flow …
Graded Refractive Index Silicon Oxynitride Thin Film Characterized By Spectroscopic Ellipsometry, Paul G. Snyder, Yi-Ming Xiong, John A. Woollam
Graded Refractive Index Silicon Oxynitride Thin Film Characterized By Spectroscopic Ellipsometry, Paul G. Snyder, Yi-Ming Xiong, John A. Woollam
Department of Electrical and Computer Engineering: Faculty Publications
A graded refractive index silicon oxynitride (SiOxNy) thin film was prepared on a silicon substrate by ion assisted deposition. Spectroscopic ellipsometry (SE) was used to optically analyze the film. The measured SE spectra (2500-8200 Å) were analyzed with several fitting models, whose construction was based on an Auger depth profile of the film. In each model, the optical response of SiOxNy was described using the Bruggeman effective medium approximation, by modeling it as a physical mixture of two distinct phases: silicon dioxide and silicon nitride. Grading was modeled by varying the silicon nitride …
Acuta Enews July 1992, Vol. 21, No. 7
Acuta Enews July 1992, Vol. 21, No. 7
ACUTA Newsletters
In This Issue
President's column
Two Region Directors elected
Party Line
Northeast Region meeting
Silicon Nitride/Silicon Oxynitrid/Silicon Dioxide Thin Film Multilayer Characterized By Variable Angle Spectroscopic Ellipsometry, Yi-Ming Xiong, Paul G. Snyder, John A. Woollam
Silicon Nitride/Silicon Oxynitrid/Silicon Dioxide Thin Film Multilayer Characterized By Variable Angle Spectroscopic Ellipsometry, Yi-Ming Xiong, Paul G. Snyder, John A. Woollam
Department of Electrical and Computer Engineering: Faculty Publications
Variable angle spectroscopic ellipsometry (VASE) was used to nondestructively characterize a silicon nitride (Si3N4)/silicon oxynitride (SiOxNy)/silicon dioxide (SiO2) thin film multilayer structure, in which Si3N3 and SiOxNy layers were deposited by plasma enhanced chemical vapor deposition and low-pressure chemical vapor deposition, respectively. The measured VASE spectra (3500-8200 Å) were analyzed with an appropriate multilayer fitting model, in which the SiOxNy layer was modeled. in the Bruggeman effective medium approximation (EMA), to be a physical mixture of two distinct phases, SiO2 …
In Vitro Development Of Zygotes From Prepubertal Gilts After Microinjection Of Dna, B. L. Williams, J. L. Johnson, A. E.T. Sparks, R. S. Canseco, J. W. Knight, William H. Velander, R. L. Page, W. N. Drohan, J. M. Young, R. E. Pearson, T. D. Wilkins, F. C. Gwazdauskas
In Vitro Development Of Zygotes From Prepubertal Gilts After Microinjection Of Dna, B. L. Williams, J. L. Johnson, A. E.T. Sparks, R. S. Canseco, J. W. Knight, William H. Velander, R. L. Page, W. N. Drohan, J. M. Young, R. E. Pearson, T. D. Wilkins, F. C. Gwazdauskas
Papers in Biotechnology
The effect of pronuclear microinjection of DNA and culture in excised mouse oviducts on the development of porcine zygotes was assessed in this study. Precocious ovulation was induced in prepubertal gilts with pregnant mare's serum gonadotrophin and hCG. Zygotes received either pronuclear microinjection of buffer alone, buffer containing a DNA construct, or no microinjection. Zygotes were cultured in vitro in either modified Krebs-Ringer bicarbonate medium (KRBI for 144 h or in mouse oviduct (MO) explant culture with KRB for 48, 72, 96, or 120 h. Pronuclear microinjection of DNA resulted in a lower (P < .05) cleavage index (CII than did buffer or no microinjection (CI 2.16 k .10 vs 2.80 f .13 and 2.93 f .lo). The CI loss was greatest for DNA-injected zygotes at the two-cell stage of development. Coculture of zygotes in MO resulted in a higher CI (P < .01) than did culture in KRB. Culture in MO for 72 h was the most beneficial system compared with MO for 48, 96, or 120 h (P < .05; CI 3.25 k .12 vs 2.66 k .18, 2.79 f .14, and 2.40 .14, respectively). Microinjection of DNA, not merely the mechanical procedure, was detrimental to early zygote development and may be the cause of low pregnancy rates.
Introduction To Intellisim 1.0, Paul Savory
Introduction To Intellisim 1.0, Paul Savory
Department of Industrial and Management Systems Engineering: Faculty Publications
IntelliSIM is a prototype for a new generation of knowledge-based simulation tool that has been developed by the Systems Simulation Laboratory at Arizona State University. This tool is a computer environment that allows non-simulation trained modelers to predict the performance of a manufacturing system for which the necessary data is available. The system provides predictive data on such items as throughput time, queue levels, equipment utilization, reactions to machine failures, etc. With IntelliSIM, the benefits of discrete-event simulation can be exploited without requiring the high level of expertise necessary to successfully conduct a sound simulation study. The approach offered with …
Acuta Enews June 1992, Vol. 21, No. 6
Acuta Enews June 1992, Vol. 21, No. 6
ACUTA Newsletters
In This Issue
Connectivity, Database Center
President's column
WISE participants
Billed party preference
Keene State gets "slammed"
New Membership Director
Acuta Enews May 1992, Vol. 21, No. 5
Acuta Enews May 1992, Vol. 21, No. 5
ACUTA Newsletters
In This Issue
Nominations for officers sought
President's column
AT&T opens development site
Northeast regional meeting
Acuta Enews April 1992, Vol. 21, No. 4
Acuta Enews April 1992, Vol. 21, No. 4
ACUTA Newsletters
In This Issue
Call for Award nominations
President's column
Managing Telecom review
Creighton opens access, ends fraud
Membership Service Coordinator
San Francisco registration form
Temperature Oscillations Of Alternating-Current-Heated Thin Filaments In Ceramic Fiber Production, Hendrik J. Viljoen, Vladimir Hlavacek
Temperature Oscillations Of Alternating-Current-Heated Thin Filaments In Ceramic Fiber Production, Hendrik J. Viljoen, Vladimir Hlavacek
Papers in Reaction Kinetics
Resistively heated filaments are used to manufacture ceramic fibers. When an ac power source is used for heating, the temperature of the filament oscillates. These oscillations influence the deposition rate on the surface of the filament. An analysis of this problem is presented, and it is also shown that these oscillatory effects diminish as the filament gauge increases. The analysis can help to decide whether an ac or a dc power source should be used.
Model-Based Target Recognition Using Laser Radar Imagery, Robert Y. Li
Model-Based Target Recognition Using Laser Radar Imagery, Robert Y. Li
Department of Electrical and Computer Engineering: Faculty Publications
Autonomous target recognition can be assisted by using CO2 laser radar data. Of these data, range data provide 3-D geometric information and Doppler data boundaries of moving targets. A powerful 3-D feature extraction algorithm based on the Hough transform is used to obtain the orientations and dimensions of the target. This information is then utilized by an inference procedure that recognizes targets based on the available evidence from the sensory data. The experimental results using actual laser radar imagery are successful and the procedure can be used for the future development of a model-based system for target recognition.
Icosahedral Phase Stabilities In Al-Cu-Ru Alloys, Jeffrey E. Shield, C. Hoppe, R.W. Mccallum, A.I. Goldman, K.F. Kelton, P.C. Gibbons
Icosahedral Phase Stabilities In Al-Cu-Ru Alloys, Jeffrey E. Shield, C. Hoppe, R.W. Mccallum, A.I. Goldman, K.F. Kelton, P.C. Gibbons
Nebraska Center for Materials and Nanoscience: Faculty Publications
By examining a wide region of the Al-Cu-Ru phase diagram, a thorough analysis of the compositional and thermal stability of the icosahedral phase has been completed. The primary solidification product of rapid solidification was a topologically and chemically disordered icosahedral phase with an extensive compositional region. Crystallization through exothermic events of the as-solidified materials produced crystalline phases, without the formation of the face-centered-icosahedral (FCI) phase. However, the FCI phase does form at higher temperatures through an endothermic reaction, indicating that it is a stable phase of the system, but only at elevated temperatures. Of the alloys studied, the FCI phase …
Acuta Enews February 1992, Vol. 21, No. 2
Acuta Enews February 1992, Vol. 21, No. 2
ACUTA Newsletters
In This Issue
Call for RD Nominations
President's column
Workshop announcement
Alabama college takes case to PSC
Party Line
Rating to Tucson seminars
Darcy-Weisbach Roughness Coefficients For Gravel And Cobble Surfaces, John E. Gilley, Eugene R. Kottwitz, Gary A. Wieman
Darcy-Weisbach Roughness Coefficients For Gravel And Cobble Surfaces, John E. Gilley, Eugene R. Kottwitz, Gary A. Wieman
Biological Systems Engineering: Papers and Publications
A laboratory study is conducted to measure Darcy-Weisbach roughness coefficients for selected gravel and cobble materials. Varying rates of flow are introduced into a flume in which a given size class of gravel or cobble material is securely attached. Roughness coefficients are calculated from measurements of discharge rate and flow velocity. The laboratory data are used to develop regression equations for relating roughness coefficients to surface cover and Reynolds number. The regression relations, which are developed for values of the Reynolds number from approximately 500 to 16,000, are tested using hydraulic data collected on surfaces containing a distribution of size …