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Selected Works

2001

Articles 1 - 11 of 11

Full-Text Articles in Engineering

Sensor And Method Of Use, Us Patent # 6,318,174, Paul L. Bergstorm Nov 2001

Sensor And Method Of Use, Us Patent # 6,318,174, Paul L. Bergstorm

Paul Bergstrom

A sensor has an electrode (120) that is movable along three mutually perpendicular axes (10, 11, 12). The sensor also has stationary over-travel limiting structures that restrict the movement of the electrode (120) along the three axes (10, 11, 12).

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Średni Współczynnik Toksyczności Spalin Emitowanych Z Procesów Spopielania Odpadów Niebezpiecznych, Robert Oleniacz Aug 2001

Średni Współczynnik Toksyczności Spalin Emitowanych Z Procesów Spopielania Odpadów Niebezpiecznych, Robert Oleniacz

Robert Oleniacz

The paper presents the characteristics of the Average Toxicity Factor (ATF) for combustion gases emitted from incineration of hazardous waste. Proposals for the interpretation of this factor and the possibility of its use in assessing the degree of nuisance of the process in terms of the level of air pollutant emissions were also discussed.

English title: Average toxicity factor of combustion gases emitted from hazardous waste incineration.

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The Use Of Self-Directed Learning To Promote Active Citizenship In Science, Technology, And Society Classes, Joshua M. Pearce Jul 2001

The Use Of Self-Directed Learning To Promote Active Citizenship In Science, Technology, And Society Classes, Joshua M. Pearce

Joshua M. Pearce

The purpose of this article is to outline the viability of a student-directed assignment within collegiate-level STS curricula for the improvement of the utilization of scientific knowledge and technology in society. The assignment, christened the Do Something! assignment, is a novel teaching tool that utilizes students’ individual interests to encourage in-depth learning across disciplines and capitalizes on their personal skills and talents to solve real-world problems. The Do Something! assignment has been utilized in two STS courses at The Pennsylvania State University (STS 100: The Ascent of Humanity and STS 200: Critical Issues in STS). The structure of this assignment …

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Hitos En La Historia De La Metalurgia, Fathi Habashi Jun 2001

Hitos En La Historia De La Metalurgia, Fathi Habashi

Fathi Habashi

Up to the Middle Ages, seven metals were only known and used by man. These were gold, silver, copper, iron, lead, tin, and mercury. During the Middle Ages the metalloids arsenic, antimony, and bismuth were isolated as well as zinc that was imported from the East. In the Eighteenth century mineral specimens were continuously supplied and analyzed which resulted in the discovery of about a dozen new metals. With the discovery of electric current at the beginning of the nineteenth century the alkali metals were isolated and these were responsible for the isolation of new metals that were not possible …

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Identification Of Shapes Using A Nonlinear Dynamic System, Shaheen Hoque, Sanza Kazadi, Angel Li, Will Chen, Elvio Sadun Jun 2001

Identification Of Shapes Using A Nonlinear Dynamic System, Shaheen Hoque, Sanza Kazadi, Angel Li, Will Chen, Elvio Sadun

Sanza Kazadi

We describe a nonlinear system capable of use as a recognition system. This system is composed of a set of coupled oscillators, connected by linear springs. Images are overlaid on the system by altering the masses and spring constants of the oscillators, thereby modifying the detailed behavior of the system. Signatures extracted from the system using FFT of the individual oscillator positions show coherance, relative continuity, and translational and rotational invariance. These properties are discussed in the context of the eventual use of this system as a general identification system.

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History Of Rare Earths On Postage Stamps, Fathi Habashi Mar 2001

History Of Rare Earths On Postage Stamps, Fathi Habashi

Fathi Habashi

Postage stamps are important means of communication and many countries have recorded important events, honored worthy individuals, and described interesting facts through this medium. Many historical facts, sometimes obscure, can be found on stamps; some of these may not be easily located in a history or a science book. Stamps have artistic value, they are created by artists. Mining and Metallurgy on Postage Stamps is intended to give a historical background to mining and metallurgy by presenting about 900 enlarged reproductions of colored stamps from different countries. Explanations are given in simple language to bring these topics to young people, …

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Semiconductor Wafer Level Package, Eu Patent # 00961925.5-2203-Us0025315, Daxue Xu, Henry G. Hughes, Paul L. Bergstorm, Frank A. Shemansky, Hak-Yam Tsoi Mar 2001

Semiconductor Wafer Level Package, Eu Patent # 00961925.5-2203-Us0025315, Daxue Xu, Henry G. Hughes, Paul L. Bergstorm, Frank A. Shemansky, Hak-Yam Tsoi

Paul Bergstrom

No abstract provided.

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Thermodynamic Analysis Of Thermomechanical Coupling In Tangential Couette Flow Of Temperature Dependent Materials, Yasar Demirel Dec 2000

Thermodynamic Analysis Of Thermomechanical Coupling In Tangential Couette Flow Of Temperature Dependent Materials, Yasar Demirel

YASAR DEMIREL

Thermodynamic analysis of the thermomechanical coupling in a tangential Couette flow is presented for the Nahme number Na range of 0.5 < Na < 2.5. In the analysis, the temperature and velocity gradients, obtained from the series solutions in the Brinkman number Br, have been used for Newtonian fluids whose viscosity and thermal conductivity are expressed as linear functions of temperature. The entropy generation and the irreversibility distributions due to the thermomechanical coupling are evaluated and displayed graphically across the gap with asymmetric wall temperatures for the Couette flow of ethylene glycol.

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Mind At Light Speed: Front Matter, David D. Nolte Dec 2000

Mind At Light Speed: Front Matter, David D. Nolte

David D Nolte

The optics revolution at the turn of the 21st century transformed how we communicate. This book is aimed at a popular audience and describes the underlying principles of optical communication, how optical science impacts our daily lives and where it may go in the future. Topics include telecommunications, visual intelligence, quantum computing and artificial intelligence.

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Preface, David D. Nolte Dec 2000

Preface, David D. Nolte

David D Nolte

Light is the quintessential messenger. It travels faster than anything. It weighs nothing, and
costs almost as little to make. A million rays of light carrying a thousand colors can travel along with each
other or through each other without interacting, carrying data and commands between millions of locations.
This is the parallelism of light, and it represents massive communication and computational power. With
it, machines of light can do a million things at once.

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Construction And Reactivity Mapping Of A Platinum Catalyst Gradient Using The Scanning Electrochemical Microscope, Shrisudersan Jayaraman, Andrew C. Hillier Dec 2000

Construction And Reactivity Mapping Of A Platinum Catalyst Gradient Using The Scanning Electrochemical Microscope, Shrisudersan Jayaraman, Andrew C. Hillier

Andrew C. Hillier

Wedescribe a method for the characterization of electro-oxidation catalysts that involves the fabrication and reactivity mapping of samples possessing a catalyst gradient. The objective of this work is to demonstrate a method for catalyst preparation and screening that directly measures the activity of spatially localized catalyst samples toward electro-oxidation reactions relevant to the fuel cell anode in an effort to discover and characterize new catalyst formulations. In this report, a well-defined gradient in the surface coverage of platinum is created on an electronically conductive but catalytically inactive indium-tin-oxide (ITO) substrate by the application of a nonuniform electric field during platinum …

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