Engineering Commons^™

Torsional Waveguide Density Sensor, Radek Glaser

Radek Glaser

Industrial Symbiosis For Very Large Scale Photovoltaic Manufacturing, Joshua M. Pearce

Joshua M. Pearce

Optimal Roughness For Minimal Adhesion, Nancy Burnham, D-L Liu, J Martin

Nancy A. Burnham

Roughness has a significant affect on adhesion. The authors used a single-asperity model to describe a smooth tip in contact with a rough surface and predicted that an optimal size of asperity yields a minimum of adhesion. Experimentally, adhesive forces on silicon wafers with varying roughness were measured using atomic-force-microscopy cantilevers with varying tip radii. It was found that minima do exist, and for all tip radii, the adhesion falls significantly for roughness greater than 1–2nm and drops at higher roughness for larger tips. This work should help minimize stiction in microelectromechanical systems and progress the understanding of nanoscale-contact mechanics.

Tailed Forisomes Of Canavalia Gladiata: A New Model To Study Ca2+-Driven Protein Contractility, Winfried Peters, Michael Knoblauch, Stephen Warmann, Reinhard Schnetter, Amy Shen, William Pickard

Winfried S. Peters

Volatile Release And Particle Formation Characteristics Of Injected Pulverized Coal In Blast Furnaces, Wei-Hsin Chen

Wei-Hsin Chen

No abstract provided.

Transient Gasification And Syngas Formation From Coal Particles In A Fixed-Bed Reactor, Wei-Hsin Chen

Wei-Hsin Chen

No abstract provided.

Performances Of Pulverized Coal Injection In Blowpipe And Tuyere At Various Operational Conditions, Wei-Hsin Chen

Wei-Hsin Chen

No abstract provided.

Globalization Of R&D And Developing Countries, Arash Golnam, Nader Ale Ebrahim, Ali Ghazizadeh

Nader Ale Ebrahim

Reflecting a broader trend towards the off shoring of services, a number of developing countries are attracting foreign direct investment in research and development. Transnational corporations, including the ones headquartered in developed countries, are selecting developing countries as locations for such activities. With the off shoring of research and development, firms aim to access the skills of new locations, adapting products to local markets and reducing their costs, in response to competitive pressures, technological changes and a more liberal trade and investment environment. In particular, information and communication technologies have had a profound effect on the way economic activities, including …

Simulations Of Bubble Column Reactors Using A Volume Of Fluid Approach: Effect Of Air Distributor, Abid Akhtar

Abid Akhtar Mr

Two- and three-dimensional numerical simulations have been performed on a laboratory scale bubble column reactor using a volume-of-fluid approach. The effect of hole-size and superficial gas velocity on the bubble size distribution and their trajectories has been investigated on a 20 cm diameter and 1 m high cylindrical reactor. All simulations were performed in a transient manner using a FLUENT solver. Surface tension between two phases has been modelled as a body force with a constant value. Turbulence was modelled using the k-(epsilon) turbulence approach. A comparison between simulation predictions and the reported experimental studies has shown a good agreement.

The Ibm Rational Unified Process For System Z, Or Making Development On System Z More Agile, Cécile Péraire, Mike Mike Edwards, Angelo Fernandes, Enrico Mancin, Kathy Carroll

Cécile Péraire

No abstract provided.

Design Of A Gas Tight Water Sampler For Auv Operations, Christopher Roman, R. Camilli

Christopher N. Roman

This paper presents the design and preliminary test results for a small gas tight water sampler intended to work on scientific AUVs. In recent years AUVs have developed into reliable platforms capable of carrying a wide variety of environmental sensors for in-situ chemical measurements. Physical sample collection however remains difficult, due to the combination of space, power and complexity constraints inherent in working with autonomous platforms. The AUV sampler is a small (12 cm times 85 cm) cylindrical package designed to collect eight 20 ml gas tight volumes of water, with each sample maintained at high pressure to depths of …

Optimization Of Open Circuit Voltage In Amorphous Silicon Solar Cells With Mixed-Phase (Amorphous + Nanocrystalline) P-Type Contacts Of Low Nanocrystalline Content, Joshua M. Pearce, N. Podzara, R. W. Collins, M. M. Al-Jassim, K. M. Jones, J. Deng, C. R. Wronski

Joshua M. Pearce

Plastic Presentation Of Control Data In Context-Awareness Environment, Anas Hariri, Johannes Petersen, Djilali Idoughi, Christophe Kolski

Professor Djilali IDOUGHI

The needs for re-adaptable presentations of supervision information are more necessary in the context-awareness environment whose environmental characteristics change frequently and the control data must be updated regularly into the Graphic User Interface (GUI), in order to provide efficiently to operators an accurate picture of the state of the system being supervised. The re-adaptation of GUI is necessary following each considerable changes in the context of use or in the measured data. We will suggest, in this paper, an approach that allows to generate GUI (in other word plastic GUI) capable to adapt dynamically at runtime to changeable context of …

R&D Management In Iran, Opportunities And Threats, Nader Ale Ebrahim, Ali Ghazizadeh, Arash Golnam, Hamid Tahbaz Tavakoli

Nader Ale Ebrahim

Research and Development (R&D) management in Iran has faced many barriers and obstacles, in which R&D units are considered as the basic core of the product development and innovation. Due to structural shortcomings, a great number of organizations and industries have not yet been able to position themselves in the market. There are about 1141 R&D units throughout Iran, due to the geographical decentralization of these units this paper considers and analyzes the R&D case study in one of the provinces located in the north part of Iran, and the findings can be generalized to the other industrialized areas and …

Who Cares About Director Independence? Presentation (Pdf Format), Paolo Santella, Carlo Drago, Giulia Paone

Carlo Drago

No abstract provided.

Design And Characteristics Of A Split Hopkinson Pressure Bar Apparatus, Radek Glaser, Jesse Haines, Christopher Knight

Radek Glaser

A Split Hopkinson Pressure Bar Apparatus, also known as Kolsky Bar that is capable of conducting compressive strain rate testing in the approximate ranges from 50 to 10^4 in/in per second was designed as a part of a Senior Design Project. Generally, this device is similar to that first used by Kolsky in 1949. The design of this device is presented here in two stages: 1. Research, design and manufacturing of the Stress Generating System 2. Experimental Part – Testing of the apparatus to obtain necessary data. The present phase of the design was focused mostly on the stress generating …

Applying Agile Approaches To Non-Software Development: Lessons Learned From The Rup For System Z Project, Cécile Péraire

Cécile Péraire

No abstract provided.

Evaluating Software Engineering Processes In Commercial And Community Open Source Projects, Tony Wasserman, Eugenio Capra

Tony Wasserman

We describe a current study for obtaining information about management of commercial and community open source projects. We have interviewed and surveyed leaders of more than 75 open source projects. Questions focused on the styles of leadership and communication, with a technical focus on testing and quality assurance processes. This paper describes the methods used to identify and contact subjects, as well as the questions posed and some results.

A Simplified Model Of Predicting Coal Reaction In A Partial Oxidation Environment, Wei-Hsin Chen

Wei-Hsin Chen

No abstract provided.

Casting Versus Carving Of The Pyramid Stones, Fathi Habashi

Fathi Habashi

Designing Resource-Bounded Reasoners Using Bayesian Networks: System Health Monitoring And Diagnosis, Ole J. Mengshoel

Ole J Mengshoel

In this work we are concerned with the conceptual design of large-scale diagnostic and health management systems that use Bayesian networks. While they are potentially powerful, improperly designed Bayesian networks can result in too high memory requirements or too long inference times, to they point where they may not be acceptable for real-time diagnosis and health management in resource-bounded systems such as NASA’s aerospace vehicles. We investigate the clique tree clustering approach to Bayesian network inference, where increasing the size and connectivity of a Bayesian network typically also increases clique tree size. This paper combines techniques for analytically characterizing clique …

Continuous Improvement In Engineering Education Through Effective Value For Money Audits, Razimah Abdullah, Rozeha A Rashid, Mazlina Esa, Sadruddin Mohd Saidfudin

Razimah Abdullah

The Influence Of Amino Acid Sequence And Functionality On The Binding Process Of Peptides Onto Gold Surfaces, Gustavo Carri

Gustavo A. Carri

We present a molecular dynamics study of the binding process of peptide A3 (AYSSGAPPMPPF) and other similar peptides onto gold surfaces, and identify the functions of many amino acids. Our results provide a clear picture of the separate regimes present in the binding process: diffusion, anchoring, crawling and binding. Moreover, we explored the roles of individual residues. We found that tyrosine, methionine, and phenylalanine are strong binding residues; serine serves as an effective anchoring residue; proline acts as a dynamic anchoring point, while glycine and alanine give flexibility to the peptide backbone. We then show that our findings apply to …

The Many Faces Of Inductive Teaching And Learning, Michael Prince, R. Felder

Michael J. Prince

No abstract provided.

Elaboration D’Un Système Intelligent De Diagnostic Et De Surveillance En Temps Réel Des Moteurs À Induction, Djalal Eddine Khodja

Boukhemis Chetate

No abstract provided.

Energy Conservation From Systematic Tire Pressure Regulation, Joshua M. Pearce, Jason T. Hanlon

Joshua M. Pearce

Development Of Measuring And Computer Interface System For An Industrial Electrostatic Precipitator, Omar H. Abdalla, Soliman M. Sharaf, Hazem F. Feshara

Omar H. Abdalla

The paper describes the design and practical implementation of a measuring and digital computer interface system for an electrostatic precipitator (ESP) filter used in a large cement factory. The objective is to develop a digital computer control system to replace an old analog controller for the ESP filter mounted on a cement production rotary kiln inside the National Cement Company. The main concern is to develop a modern technology for a real ESP controller designed and implemented locally in Egypt. The first phase of this research project is described in this paper. The computer interface system is developed to facilitate …

Emp: A National-Scale Threat To The U.S. Infrastructure, George H. Baker

George H Baker

Since the nuclear weapon atmospheric test days of the 1950s, it has been known that a single nuclear weapon detonated at altitudes from about 30-500 kilometers generates a strong electromagnetic pulse (EMP) that can disrupt electronic systems on the ground at large distances. During the Cold War, the effects of high altitude nuclear detonations were considered by many to be ephemeral, second order effects in comparison to direct blast/thermal/radiation effects from near-surface bursts in the context of mutually-assured-destruction (or MAD) scenarios. However, as infrastructure objectives have gained prominence in military operations, the likelihood of high altitude nuclear scenarios have gained …

Derivation And Application Of A Conserved Orbital Energy For The Inverted Pendulum Bipedal Walking Model, Jerry E. Pratt, Sergey V. Drakunov

Sergey V. Drakunov

New Technique Of One And Simultaneous Two Open-Switches Fault Automation Detection And Location In Two Level Three Voltage Inverter, Tarak Benslimane, Boukhemis Chetate

Boukhemis Chetate

No abstract provided.