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1998

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Articles 1 - 30 of 1481

Full-Text Articles in Engineering

Analiza Źródeł Emisji Związków Fluoru Z Procesów Hutnictwa Żelaza, Marian Mazur, Robert Oleniacz, Marek Bogacki Dec 1998

Analiza Źródeł Emisji Związków Fluoru Z Procesów Hutnictwa Żelaza, Marian Mazur, Robert Oleniacz, Marek Bogacki

Robert Oleniacz

The paper presents the results of many years of complex research issues related to the emission of fluorine compounds of iron and steel processes. They allowed to examine these processes used in raw materials in terms of the fluorine content and their impact on the amount of emissions of fluorine compounds to the air. Were determined by measuring the levels of concentration in flue gases and stack emissions of fluorine in the form of gaseous and solid compounds, including water-soluble components (considered to be toxic).

English title: Analysis of emission sources of fluorine compounds from the processes of ferrous metallurgy.


Związki Siarki Emitowane Z Procesu Wielkopiecowego, Marian Mazur, Marek Bogacki, Robert Oleniacz Dec 1998

Związki Siarki Emitowane Z Procesu Wielkopiecowego, Marian Mazur, Marek Bogacki, Robert Oleniacz

Robert Oleniacz

The article describes the problem of the presence of sulfur in the blast furnace process and identifies emission sources of sulfur compounds in this process. On the basis of the measurements and calculations, the types and quantities of these compounds emitted to the air were determined. It was found that pig iron smelting in a blast furnace causes emissions of COS, SO2 and H2S. These emissions occur by losses of blast furnace gas (COS and SO2), transport of blast furnace slag inside the furnace hall (SO2) and treatment of the slag by granulation (H2S). However, the most important are only ...


Spalanie Odpadów W Procesie Skojarzonym Z Produkcją Klinkieru Cementowego - Problem Emisji Zanieczyszczeń, Robert Oleniacz Dec 1998

Spalanie Odpadów W Procesie Skojarzonym Z Produkcją Klinkieru Cementowego - Problem Emisji Zanieczyszczeń, Robert Oleniacz

Robert Oleniacz

The paper presents a review of emissions of main gaseous pollutants (including acidic constituents), some organic compounds (including dioxins and furans), particulates and heavy metals from cement kilns burning waste fuels.

A widely employed method to reduce the cost of cement production is the substitution of traditional fuels used in cement kilns with alternative and waste-derived fuels. Cement industry offers the most acceptable method of waste (especially hazardous waste) thermal treatment and disposal at much lower cost than commercial incinerators. Characteristic for cement kilns high temperatures and long residence time of exhaust gas ensure almost complete destruction of organic compounds ...


Lead-Free Interconnection For Electronic Devices, Ravi F. Saraf Dec 1998

Lead-Free Interconnection For Electronic Devices, Ravi F. Saraf

Patents Held by Members of the Department of Chemical and Biomolecular Engineering

An electronic device that is equipped with a plurality of bonding pads positioned on the device for making electrical interconnections and electrically conductive composite bumps adhered to the bonding pads wherein the bumps are formed of a composite material consisting of a thermoplastic polymer and at least about 30 volume percent of conductive metal particles based on the total volume of the metal particles and the thermoplastic polymer. The present invention is also directed to a method of making electrical interconnections to an electronic device by pressing a plurality of composite bumps of a polymeric based material against a substrate ...


The Effect Of Particle Properties On The Flow Characteristics Of Electrophotographic Powders, Joseph Pedano Dec 1998

The Effect Of Particle Properties On The Flow Characteristics Of Electrophotographic Powders, Joseph Pedano

Theses and Dissertations

The effect of particle size on the flow characteristics and tribo-electrical charge of dry electrophotographic (toner) powders was investigated. Toner samples, consisting of the same base formulation, but differing in particle size were prepared and studied using commercially available processing and analytical equipment. The effect of post-blending fumed silica into the toner was also investigated as part of this work. The results indicate that toner particle size has a strong effect on toner flow characteristics. The flowability measurements that were most affected by the particle size were the cohesiveness and compressibility properties of the toner powders. The data showed that ...


Optimization Of Temperature-Glycerol -Ph Conditions For Fed-Batch Fermentation Process For Recombinant Hookworm (Ancylostoma Caninurn) Anticoagulant Peptide (Acap-5) Production By Pichia Pastoris, Mehmet Inan, Vijay Chiruvolu, Kent M. Eskridge, George P. Vlasuk, Kenneth Dickerson, Scott Brown, Michael M. Meagher Dec 1998

Optimization Of Temperature-Glycerol -Ph Conditions For Fed-Batch Fermentation Process For Recombinant Hookworm (Ancylostoma Caninurn) Anticoagulant Peptide (Acap-5) Production By Pichia Pastoris, Mehmet Inan, Vijay Chiruvolu, Kent M. Eskridge, George P. Vlasuk, Kenneth Dickerson, Scott Brown, Michael M. Meagher

Papers in Biochemical Engineering

This study was undertaken to determine the optimum pH, temperature and glycerol feed rate for the production of recombinant hookworm (Ancylostoma caninum) anticoagulant peptide (rAcAP-5) by Pichia pastoris using response surface methodology (RSM). A central composite design was used as an experimental design for allocation of treatment combinations in three blocks. The variables selected for study were pH, temperature and glycerol feed rate. pH was the most important variable affecting yield, specific yield and specific activity of rAcAP-5. Glycerol feed rate had a significant effect on the specific activity of rAcAP-5 (% of total secreted protein) while temperature did not have ...


22. Yu Tongyin, Otto Vogl, Shukuan Fu Dec 1998

22. Yu Tongyin, Otto Vogl, Shukuan Fu

Emeritus Faculty Author Gallery

No abstract provided.


International Symposium On Ionic Polymerization Ip'97, Otto Vogl, Przemyslaw Kubisa Dec 1998

International Symposium On Ionic Polymerization Ip'97, Otto Vogl, Przemyslaw Kubisa

Emeritus Faculty Author Gallery

No abstract provided.


Transient Stability Estimation Using Artificial Intelligence Methodology: An Inductive Inference Approach, Almoataz Youssef Abdelaziz Dec 1998

Transient Stability Estimation Using Artificial Intelligence Methodology: An Inductive Inference Approach, Almoataz Youssef Abdelaziz

Almoataz Youssef Abdelaziz

Many techniques are used for Transient Stability (TS) estimation of synchronous generators encompassing traditional time domain state numerical integration, Lyapunov based methods, probabilistic approaches and Artificial Intelligence (AI) techniques like pattern recognition and recently neural networks. This paper examines another recently proposed artificial intelligence technique to tackle the transient stability problem. The technique is based on the Inductive Inference Reasoning approach which belongs to a particular family of Machine Learning from Examples. Not only steady state but transient attributes are also used for transient stability estimation so as to reflect machine dynamics and network changes due to faults. The approach ...


A Fuzzy Simulation Model Of Basic Commutating Electrical Machines, D. K. Chaturvedi, P. S. Satsangi, P. K. Kalra Dec 1998

A Fuzzy Simulation Model Of Basic Commutating Electrical Machines, D. K. Chaturvedi, P. S. Satsangi, P. K. Kalra

D. K. Chaturvedi Dr.

Fuzzy Logic as applied to a great extent in controlling the process, plants and various complex systems, due to its inherent advantages like simplicity, ease in design, robustness and adaptivity. Aslo it is established that this approach works very well especially when the systems are not transparent. In this paper the approach is used for the modelling and simulation of an electrical machine to predict the behaviour of the machine under running conditionsas well as unde starting conditions. The starting characteristics of electrical machines are non-linear in nature, and it is very difficult to model them accurately. Also the developed ...


A Continuous Process For The Conversion Of Vegetable Oils Into Methyl Esters Of Fatty Acids, Hossein Noureddini, D Harkey, V Medikonduru Dec 1998

A Continuous Process For The Conversion Of Vegetable Oils Into Methyl Esters Of Fatty Acids, Hossein Noureddini, D Harkey, V Medikonduru

Papers in Biomaterials

A continuous process for the transesterification of triglycerides to methyl esters was investigated in a pilot plant. The process was equipped with a motionless and a high-shear mixer. The experimental studies explored variations in the mixing intensity, stoichiometry, and catalyst concentration on the overall conversion. The combined as well as individual effect of mixers was examined. The developed process resulted in high conversions of vegetable oils into methyl esters. Conversion of triglycerides to methyl esters in excess of 98% was achieved. Larger excess amounts of alcohol favored higher conversions. The motionless and high-shear mixers each provided adequate mixing for the ...


Acuta Enews December 1998, Vol.27, No. 12 Dec 1998

Acuta Enews December 1998, Vol.27, No. 12

ACUTA Newsletters

In This Issue

Increase in PICC Charges Delayed

Looking for Answers in '99

Overheard on the Listserve

411 Newsletter Salary Survey

Beefing Up User Support on Campus

Board Report

DC at a Glance

Positions Available

Welcome New Members


23rd Conference On Senior Engineering Design Projects, College Of Engineering And Applied Sciences Dec 1998

23rd Conference On Senior Engineering Design Projects, College Of Engineering And Applied Sciences

Senior Engineering Design Conference

The 23rd Conference on Senior Engineering Design Projects was held on December 1, 1998 at the College of Engineering and applied Sciences on the Parkview Campus of Western Michigan University. The college sponsors the conference to showcase the work of its graduating seniors, who are required to complete a capstone project that puts into practice what they have learned. Many of the projects are sponsored by business and industry.


Effect Of Multiple Range Rings Vs. A Single Range Ring On Pilot Perception Of Vertical Separation On A Cockpit Display Of Traffic Information, Daniel B. Rizzardi Dec 1998

Effect Of Multiple Range Rings Vs. A Single Range Ring On Pilot Perception Of Vertical Separation On A Cockpit Display Of Traffic Information, Daniel B. Rizzardi

Theses - Daytona Beach

The purpose of this study was to determine the effectiveness of both a two and four mile range ring versus a single three mile range ring on pilot's perception of future vertical separation as viewed on a cockpit display of traffic information. The subjects consisted of 30 volunteer pilots from Embry-Riddle Aeronautical University and the surrounding Daytona Beach, Florida area.

The simulation of a cockpit display of traffic information was generated using SuperCard® Version 1.6 software and a Macintosh IIx® personal computer. Eighty unique scenarios were monitored by the pilots in which they determined, as early as possible ...


Classification Of In-Flight Fatigue Cracks In Aircraft Structures Using Acoustic Emission And Neural Networks, Christopher Lee Rovik Dec 1998

Classification Of In-Flight Fatigue Cracks In Aircraft Structures Using Acoustic Emission And Neural Networks, Christopher Lee Rovik

Theses - Daytona Beach

The research encompassed within this paper deals with the analysis and classification of fatigue cracks in aircraft structures. The particular structure that was examined was the vertical tail section of a Cessna T-303 Crusader aircraft. The analysis was performed using the nondestructive evaluation technique known as acoustic emission (AE), as well as the artificial intelligence of neural networks. Data were taken in a controlled laboratory environment as well as in a flying testbed aboard the aircraft.

The first part of the research involved the analysis of a typical aircraft structure in a controlled laboratory environment. This support structure was fabricated ...


A Methodology For Acoustic Measurement And Separation Of Background Noise, Sekhar Radhakrishnan Dec 1998

A Methodology For Acoustic Measurement And Separation Of Background Noise, Sekhar Radhakrishnan

Masters Theses

An attempt is made at developing experimental methods for the acoustic measurement and separation of background noise in a wind tunnel. To this end, an array beamforming technique known as delay-and- sum beamforming is identified and tested.

The theory underlying delay-and-sum beamforming is discussed. Two linear arrays, the seven microphone linear array and the four microphone minimum redundancy array, are designed. A driver is designed based on Helmholtz resonator theory to provide a source of monochromatic sound. Also, the concept of partial coherence as applicable to the separation of background noise from signal noise is investigated.

Array beamforming results show ...


Justification Of Heuristic Methods In Data Processing Using Fuzzy Theory, With Applications To Detection Of Business Cycles From Fuzzy Data, Vladik Kreinovich, Hung T. Nguyen, Berlin Wu Dec 1998

Justification Of Heuristic Methods In Data Processing Using Fuzzy Theory, With Applications To Detection Of Business Cycles From Fuzzy Data, Vladik Kreinovich, Hung T. Nguyen, Berlin Wu

Departmental Technical Reports (CS)

No abstract provided.


Interval Computations, Soft Computing, And Aerospace Applications, Vladik Kreinovich Dec 1998

Interval Computations, Soft Computing, And Aerospace Applications, Vladik Kreinovich

Departmental Technical Reports (CS)

No abstract provided.


Towards Optimal Pain Relief: Acupuncture And Spinal Cord Stimulation, Richard Alo, Kenneth Alo, Obinna Ilochonwu, Vladik Kreinovich, Hoang Phuong Nguyen Dec 1998

Towards Optimal Pain Relief: Acupuncture And Spinal Cord Stimulation, Richard Alo, Kenneth Alo, Obinna Ilochonwu, Vladik Kreinovich, Hoang Phuong Nguyen

Departmental Technical Reports (CS)

One of the important potential areas of application of intelligent virtual environment is to training medical doctors. One of the main problems in designing the corresponding intelligent system is the computational complexity of the corresponding computational problems. This computational complexity is especially high when the corresponding optimization is a discrete optimization problem, e.g., for pain relief methodologies such as acupuncture and spinal cord stimulation. In this paper, we show how to efficiently solve the corresponding discrete optimization problems. As a result, we get, e.g., a theoretical justification for the heuristic method of "guarded cathode".


Interval Image Classification Is Np-Hard, Alejandro E. Brito, Vladik Kreinovich Dec 1998

Interval Image Classification Is Np-Hard, Alejandro E. Brito, Vladik Kreinovich

Departmental Technical Reports (CS)

Feature extraction from images to perform object classification is a very hard problem for general solution. We prove that under interval uncertainty, linear classification is NP-hard.


Towards Intelligent Virtual Environment For Teaching Telemanipulation Operators: Virtual Tool Approach And Its Interval-Based Justification, L. Olac Fuentes, Vladik Kreinovich Dec 1998

Towards Intelligent Virtual Environment For Teaching Telemanipulation Operators: Virtual Tool Approach And Its Interval-Based Justification, L. Olac Fuentes, Vladik Kreinovich

Departmental Technical Reports (CS)

No abstract provided.


Fitness Landscape Analysis Of Discrete Constrained Optimization Problems, Sai Prasanna Ravichandran Dec 1998

Fitness Landscape Analysis Of Discrete Constrained Optimization Problems, Sai Prasanna Ravichandran

Master's Theses

The exponentially large size of the solution space of typical optimization problems precludes the use of any deterministic approach to search for an optimal solution. A more efficient and efficacious approach is to use heuristic algorithms based on rules of thumb to guide the search process in the solution space. Associated with every solution in the space is a real number called fitness that signifies the quality of a solution. This space and the fitness values together form the fitness landscapes. Knowledge about the topology of these fitness landscapes is vital for any heuristic search operator to expedite the search ...


Adaptive Channel Equalization Techniques, Saied Razavilar Dec 1998

Adaptive Channel Equalization Techniques, Saied Razavilar

Master's Theses

Inter Symbol Interference (ISI) is a characteristic of band-limited communication channels that can severely degrade the digital communication system performance if not treated properly. Channel equalization techniques may be used to mitigate the effects of ISI in the system, thereby improving the system capacity and performance. In this thesis, the problem of Inter Symbol Interference caused by the nonlinear characteristics of band limited communication channels and adaptive equalization techniques to combat the effects of ISI are discussed. First, the analysis of ISI in a band limited communication channel using a concrete theoretical framework is presented. Next, various adaptive equalization techniques ...


An Analysis Of Texture Resulting From Thermomechanical Processing Of Ti-6al-V, David J. Brock Dec 1998

An Analysis Of Texture Resulting From Thermomechanical Processing Of Ti-6al-V, David J. Brock

Master's Theses

An investigation of texture and microstructure formation in Ti-6Al-4V after thermomechanical processing and heat treating was performed. X-ray diffraction was used to measure prismatic and pyramidal pole figures. These pole figures were used to calculate basal pole figures, which showed significant changes in texture from heavy rolling and near or above β-transus heat treatments. Primary texture components were found to be strengthened by near β-transus heat treatments. For heavily rolled material, above β-transus heat treatments were found to reverse the primary texture components order of dominants. Heavy rolling was found to reduce the RD component and strengthen the TD.


Determination Of The Tensile And Shear Strengths Of Screws And The Effect Of Screw Patterns On Cold-Formed Steel Connections, Marc Allen Sokol, Roger A. Laboube, Wei-Wen Yu Dec 1998

Determination Of The Tensile And Shear Strengths Of Screws And The Effect Of Screw Patterns On Cold-Formed Steel Connections, Marc Allen Sokol, Roger A. Laboube, Wei-Wen Yu

Center for Cold-Formed Steel Structures Library

PREFACE This report summarizes two studies related to the design of cold-formed steel connections. The study topics included the creation of a test standard for determining the strength of a screw, and the determination of the strength of a screw connection. A standard test protocol does not exist for determining the strength of a screw. Today, manufacturers use test protocols developed for their products. Thus, there is no consistency in defining the structural performance of a screw. A test standard has been developed. The standard used as its model the American Society of Testing and Material's F 606, Standard ...


Evaluation Of 93-Inch Corrugated Metal Culvert On Ky 693 And Us 23, Green-Up County, L. John Fleckenstein, Richard Reitenour, David L. Allen Dec 1998

Evaluation Of 93-Inch Corrugated Metal Culvert On Ky 693 And Us 23, Green-Up County, L. John Fleckenstein, Richard Reitenour, David L. Allen

Kentucky Transportation Center Research Report

No abstract provided.


22. Yu Tongyin, Otto Vogl, Shukuan Fu Dec 1998

22. Yu Tongyin, Otto Vogl, Shukuan Fu

Otto Vogl

No abstract provided.


International Symposium On Ionic Polymerization Ip'97, Otto Vogl, Przemyslaw Kubisa Dec 1998

International Symposium On Ionic Polymerization Ip'97, Otto Vogl, Przemyslaw Kubisa

Otto Vogl

No abstract provided.


The Conference Proceedings Of The 1998 Air Transport Research Group (Atrg) Of The Wctr Society, Volume 1 , Tae Hoon Oum, Brent D. Bowen, Uno Aviation Institute Dec 1998

The Conference Proceedings Of The 1998 Air Transport Research Group (Atrg) Of The Wctr Society, Volume 1 , Tae Hoon Oum, Brent D. Bowen, Uno Aviation Institute

Faculty Books and Monographs

UNOAI Report 98-6


The Conference Proceedings Of The 1998 Air Transport Research Group (Atrg) Of The Wctr Society, Volume 3 , Tae Hoon Oum, Brent D. Bowen, Uno Aviation Institute Dec 1998

The Conference Proceedings Of The 1998 Air Transport Research Group (Atrg) Of The Wctr Society, Volume 3 , Tae Hoon Oum, Brent D. Bowen, Uno Aviation Institute

Faculty Books and Monographs

UNOAI Report 98-8