Engineering Commons^™

Effect Of Microreactor Geometry In Performance Of Catalytic Microreactor Of Hydrogen Production By Cfd Modeling, Mohsen Behnam, Ali Fazeli, Shohreh Fatemi, Yadolah Mortazavi, A. Khodadai

Ali Fazeli

Hydrogen production from steam reforming of methanol for fuel cell application was modeled in a wall coated micro channel reactor by CFD approach. Heat of steam reforming was supplied from catalytic total oxidation (TOX) of methanol in neighboring channel of steamreforming (SR) channel and conduct from TOX to SR channel through metal divider wall of the channels. Heat integration was compared in zigzag and straight geometry of microreactor by CFD modeling. The model is 2 dimensional, steady state and containing five zones: TOX fluid, TOX catalyst layer, steel wall of the channel, SR catalyst layer, SR fluid. Set of partial …

Virtual Environments Innovation And R&D Activities: Management Challenges, Nader Ale Ebrahim, Shamsuddin Ahmed, Zahari Taha

Nader Ale Ebrahim

Companies will not survive long unless they join a threefold revolution in management itself, innovation, and information technology. Innovation plays a central role in economic development, at regional and national level. In the competitive environment companies are obliged to produce more rapidly, more effectively and more efficiently in new product development which is a result of research and development (R&D) activities. It is necessary for them to put together different capabilities and services with the goal, through cooperation between suppliers and customers, service providers and scientific institutions to achieve innovations of high quality. Depending on the type of industry, the …

Virtual R&D Teams: A Sustainable Infrastructure For Promoting Smes, Nader Ale Ebrahim, Shamsuddin Ahmed, Zahari Taha

Nader Ale Ebrahim

Small and medium sized enterprises (SMEs) are a major part of the industrial economies. Their survival and growth has therefore been a prominent issue. Research and development (R&D) enables firms to create new technologies and/or to build on existing technologies obtained through technology transfer. Nowadays unpredictable environment suggests that many firms seek new ways of conducting their business through some kind of R&D activities to make a profit and stay ahead of the competition. To survive in the global economy SMEs have to improve their products and processes exploiting their intellectual capital in a dynamic network of knowledge-intensive relations inside …

Efficient Non-Coding Rna Gene Searches Through Classical And Evolutionary Methods, Jennifer Smith

Jennifer A. Smith

Successful non-coding RNA gene searching requires examination of long-range intramolecular base pairing possibilities. This results in search algorithms with extremely long run times such that large-scale use of the algorithms often becomes computationally infeasible. Methods for the efficient search of the solution space are examined. A review of the standard dynamic-programming covariance model search algorithm is given. An analysis of the statistically probable regions of the search space is undertaken and a method of limiting the traditional dynamic-programming algorithm to this region is shown. An alternative search method using a Genetic Algorithm (GA) which favours the probable region of the …

Dealing With Virtual R&D Teams In New Product Development, Nader Ale Ebrahim, Shamsuddin Ahmed, Zahari Taha

Nader Ale Ebrahim

National and global collaboration in research and development (R&D) is becoming increasingly important in creating the knowledge that makes research and business more competitive. Multinational enterprises have increased their research and development (R&D) investment in different countries. These multiple sites encourage the development of more ideas, due to the varied international backgrounds in global networks and the knowledge spillovers. In order to secure the viability of business processes, services and products R&D teams need to access and retrieve information from as many sources as possible. From the other perspective virtual teams are important mechanisms for organizations seeking to control scarce …

Enhanced Recovery Of Mechanical Function In The Canine Heart By Seeding An Extracellular Matrix Patch With Mesenchymal Stem Cells Committed To A Cardiac Lineage., Glenn Gaudette, Irina Potapova, Sergey Doronin, Damon Kelly, Amy Rosen, Adam Schuldt, Zhongju Lu, Paul Kochupura, Richard Robinson, Michael Rosen, Peter Brink, Ira Cohen

Glenn R. Gaudette

The need to regenerate tissue is paramount, especially for the heart that lacks the ability to regenerate after injury. The urinary bladder extracellular matrix (ECM), when used to repair a right ventricular defect, successfully regenerated some mechanical function. The objective of the current study was to determine whether the regenerative effect of ECM could be improved by seeding the patch with human mesenchymal stem cells (hMSCs) enhanced to differentiate down a cardiac linage. hMSCs were used to form three-dimensional spheroids. The expression of cardiac proteins was determined in cells exposed to the spheroid formation and compared with nonmanipulated hMSCs. To …

Edge-Stress Induced Warping Of Graphene Sheets And Nanoribbons, Ashwin Ramasubramaniam, Y. W. Zhang, C. D. Reddy, V. B. Shenoy

Ashwin Ramasubramaniam

Diagnostic Analysis Of A Small-Scale Incinerator By The Garson Index, Wei-Hsin Chen

Wei-Hsin Chen

No abstract provided.

Quranic Verse Recitation Recognition Module For Educational Programme, Noor Jamaliah Ibrahim, Zulkifli Mohd Yusoff, Zaidi Razak

Noor Jamaliah Ibrahim

In the process of learning al-Quran, reciters are required to learn al-Quran through the manual method of Quran reading skills of talaqqi and musyafahah method. These methods are described as face to face learning process between students and teachers (Mudarris), where listening, correction of al-Quran recitation and repetition of the correct al-Quran recitation takes place. The reason behind this method is to allow Mudarris to check the Tajweed rules of the Quran recitation in real time. However, the current methods of Quran recitation are believed become unattractive and less effective to be implemented, especially for j-QAF students. Focus on j-QAF …

Research For Propanediol, Chuen-Tat Kang

Kang Chuen Tat (江俊达)

First and foremost, I would like to express my deepest gratitude to all parties involve in the contribution of the contents of the book. Without their efforts this book publication will never be made possible. This book summarizes the research experience of Chuen-Tat Kang comprehensively from year 2005 in Australia. Most portion of the book describes the biocatalysis research held in Swinburne University of Technology (www.swin.edu.au) and Commonwealth Scientific and Industrial Research Organization (CSIRO) Australia (www.csiro.gov.au) during the postgraduate doctorate studies in year 2005. Portion of the content of the scientific research experience could be viewed at the website http://chuentat.tripod.com. …

Building E-Learning System Based On Multimedia

Benjamin L. Harwood

Abstract Advances in information technology and communications, have brought change in society and create new paradigms for education and training. these massive changes have extraordinary impact in our educational and training systems. In line with growth of information technology and communications which so quickly, hence development and innovation from concept, model or way of virtual learning (LMS and LCMS) continue to be conducted. One of them is by combined multimedia and e-learning. Integration of multimedia components (video and audio streaming) into e-learning system can enrich function and tools and also pattern study of interactive like video and audio conferencing able …

Building E-Learning System Based On Multimedia

Homa. P. Harahap

Abstract Advances in information technology and communications, have brought change in society and create new paradigms for education and training. these massive changes have extraordinary impact in our educational and training systems. In line with growth of information technology and communications which so quickly, hence development and innovation from concept, model or way of virtual learning (LMS and LCMS) continue to be conducted. One of them is by combined multimedia and e-learning. Integration of multimedia components (video and audio streaming) into e-learning system can enrich function and tools and also pattern study of interactive like video and audio conferencing able …

The Role Of Science And Engineering In Water Regulation Over The Past 100 Years, James R. May, Patrick Clary

James R. May

This article explores how scientific and engineering principles are inexorably linked to the regulation of water. Scientists and engineers first discovered the link between disease and water sources in the mid-19th century. Over the years, scientists and engineers have led the way to identifying water quality problems and their causes. These discoveries have directly contributed to the scope of water regulation in the United States and elsewhere. In addition, changes in water quality regulation have dictated the need for increasingly sophisticated water treatment technologies and engineers have been at the forefront of the development of these water control technologies. This …

Nano-Structured Materials For Imaging Polarimetry, Andrew Sarangan

Andrew Sarangan

No abstract provided.

Modeling And Simulation Of Hydrogen Generation From Hightemperature And Low-Temperature Water Gas Shift Reactions, Wei-Hsin Chen

Wei-Hsin Chen

No abstract provided.

Collision-Tolerant Transmission With Narrow-Beam Antennas, Hong-Ning Dai, Kam-Wing Ng, Min-You Wu, Bo Li

Hong-Ning Dai

The application of directional antennas in wireless ad hoc networks brings numerous benefits, such as increased spatial reuse and mitigated interference. Most MAC protocols with directional antennas are based on the RTS/CTS mechanism which works well in wireless ad hoc networks using omni-directional antennas. However, RTS/CTS frames cannot mitigate the interference completely. Besides, they also contribute a lot to the performance overhead. This paper studies the problem from a new perspective. We have found that the transmission success probability under directional transmission and directional reception is quite high when the antenna beamwidth is quite narrow. Motivated by the analytical results, …

Virtual R&D Teams For Npd In Smes: Past, Present And Future Trend, Nader Ale Ebrahim, Shamsuddin Ahmed, Zahari Taha

Nader Ale Ebrahim

This paper provides a comprehensive review on different aspects of virtual teams based on authentic and reputed publications. The purpose of the state-of-the-art literature review is to provide an overview of what is known about the structure and dynamics of R&D collaboration in SMEs. SMEs are the backbone of the world business. The focus of the investigation is on virtual R&D teams in SMEs. After providing a definition and importance of virtual teams, research and development (R&D), small and medium enterprises (SME) and new product development (NPD), the relationship between them will be examined. This paper seeks to address some …

Concurrent Collaboration In Research And Development, Nader Ale Ebrahim, Shamsuddin Ahmed, Zahari Taha

Nader Ale Ebrahim

Integration is the essence of current research and development (R&D) activity in many organizations. Integration can be established in various ways depending on the type, size and intricacy in organizational functions and products. Nevertheless, research and development (R&D) has become an inevitable function in most manufacturing companies in order to develop their own product niches for their survival in the prevailing highly completive market environment. Research and development functions are fundamental drivers of value creation in technologybased enterprises. Of creating and maintaining a vibrant R&D environment, organizations individually or collectively need to incorporate virtual R&D team. A virtual R&D team …

New Product Development In Virtual Environment, Nader Ale Ebrahim, Shamsuddin Ahmed, Zahari Taha

Nader Ale Ebrahim

Purpose - The literature on the topic has evolved exponentially since eight years ago. Relaying on a review of studies published in recent years, this article proposes and discusses a framework which incorporates a set of virtual teams involved in a new product development initiative. Design/methodology/approach – A range of academic and practitioner literature related to virtual teams and virtual new product development is reviewed. What is Virtual New Product Development and what determines its development in manufacturing firms? These two questions are answered. Findings - The decision to use a virtual team is often a necessity and not a …

Homogeneous Dbd In N2: 1) Lif, Talif And Electrical Measurements, N. Gherardi, Et. Es-Sebbar, C. Sarra-Bourret, N. Naudé, F. Massines

Dr. Et-touhami Es-sebbar

In this paper we compare two different discharges that can be obtained in a DBD configuration, that is to say the filamentary discharge (usual regime in atmospheric DBD) with the Atmospheric Pressure Townsend Discharge (APTD), which is a homogeneous regime obtained in nitrogen atmosphere. The aim is to help in the understanding of the processes which control the transition from one regime to the other. To do so, the discharge is characterized through electrical measurements, coupled with optical diagnostics among which Laser Induced Fluorescence (LIF) for radical density measurements. The influence of the addition of small quantities of additives on …

A Perception-Driven Autonomous Urban Vehicle, John Leonard, Jonathan How, Seth Teller, Mitch Berger, Stefan Campbell, Gaston Fiore, Luke Fletcher, Emilio Frazzoli, Albert Huang, Sertac Karaman, Olivier Koch, Yoshiaki Kuwata, David Moore, Edwin Olson, Steve Peters, Justin Teo, Robert Truax, Matthew Walter, David Barrett, Alexander Epstein, Keoni Mahelona, Katy Moyer, Troy Jones, Ryan Buckley, Matthew Antone, Robert Galejs, Siddhartha Krishnamurthy, Jonathan Williams

David Barrett

This paper describes the architecture and implementation of an autonomous passenger vehicle designed to navigate using locally perceived information in preference to potentially inaccurate or incomplete map data. The vehicle architecture was designed to handle the original DARPA Urban Challenge requirements of perceiving and navigating a road network with segments defined by sparse waypoints. The vehicle implementation includes many heterogeneous sensors with significant communications and computation bandwidth to capture and process high-resolution, high-rate sensor data. The output of the comprehensive environmental sensing subsystem is fed into a kinodynamic motion planning algorithm to generate all vehicle motion. The requirements of driving …

Cut Part Count And Increase Dynamic Range In The Hybrid Coupled Attenuator, Chin-Leong Lim

Chin-Leong Lim

Modern digital modulation formats are generally phase-sensitive. Therefore, the variable attenuators in digital wireless equipment should exhibit minimal phase variation over attenuation. The hybrid coupled attenuator (HCA) has substantially less phase variation than the competing constant-impedance attenuators such as the Pi and the Bridged-T. At microwave frequencies, HCA implementations tend to suffer from reduced dynamic (attenuation) range due to component parasitics, especially when plastic-packaged PIN diodes are selected to lower cost. To maximize the dynamic range in a low-cost 1.9 GHz HCA , we first identified the critical components and then compensated for their deleterious effect. This paper describes the …

An Experimental Study On Carbon Monoxide Conversion And Hydrogen Generation From Water Gas Shift Reaction, Wei-Hsin Chen

Wei-Hsin Chen

No abstract provided.

Oscillating Regime In Carbonylation Reaction Of Propargyl Alcohol (In Russian), Sergey N. Gorodsky, Anatoly V. Kurdiukov, Oleg N. Temkin

Sergey N. Gorodsky

No abstract provided.

A Transcendental To Changing Metal Powder Characteristics, Mahendra Kumar Trivedi, Rama Mohan Tallapragada

Mahendra Kumar Trivedi

• https://www.trivedieffect.com/science/a-transcendental-approach-to-changing-metal-powder-characteristics
• https://www.sciencedirect.com/science/article/pii/S0026065708701450

A Framework For Systematic Benchmarking Of Monitoring And Diagnostic Systems, Tolga Kurtoglu, Ole J. Mengshoel, Scott Poll

Ole J Mengshoel

In this paper, we present an architecture and a formal framework to be used for systematic benchmarking of monitoring and diagnostic systems and for producing comparable performance assessments of different diagnostic technologies. The framework defines a number of standardized specifications, which include a fault catalog, a library of modular test scenarios, and a common protocol for gathering and processing diagnostic data. At the center of the framework are 13 benchmarking metric definitions. The calculation of metrics is illustrated on a probabilistic model-based diagnosis algorithms utilizing Bayesian reasoning techniques. The diagnosed system is a real-world electrical power system, namely the Advanced …

Valley Splitting In Si Quantum Dots Embedded In Sige, Srikant Srinivasan

Srikant Srinivasan

We examine energy spectra of Si quantum dots embedded in Si0.75Ge0.25 buffers using atomistic numerical calculations for dimensions relevant to qubit implementations. The valley degeneracy of the lowest orbital state is lifted and valley splitting fluctuates with monolayer frequency as a function of the dot thickness. For dot thicknesses ≤ 6 nm, valley splitting is found to be >150 μeV. Using the unique advantage of atomistic calculations, we analyze the effect of buffer disorder on valley splitting. Disorder in the buffer leads to the suppression of valley splitting by a factor of 2.5; the splitting fluctuates with ≈ 20 μeV …

Active Species Generation Of Homogeneous Dbd In N2: Experiment And Modelling, N. Gherardi, Et. Es-Sebbar, C. Sarra-Bourret, N. Naudé, F. Massines, D. Tzyganov, P. Ségur, S. Pancheshnyi

Dr. Et-touhami Es-sebbar

No abstract provided.

Influence Of Hydrogel Mechanical Properties And Mesh Size On Vocal Fold Fibroblast Extracellular Matrix Production And Phenotype, Huimin Liao, Dany Munoz Pinto, Xin Qu, Yaping Hou, Melissa Grunlan, Mariah Hahn

Dany J. Munoz Pinto

Current clinical management of vocal fold (VF) scarring produces inconsistent and often suboptimal results. Researchers are investigating a number of alternative treatments for VF lamina propria (LP) scarring, including designer implant materials for functional LP regeneration. In the present study, we investigate the effects of the initial scaffold elastic modulus and mesh size on encapsulated VF fibroblast (VFF) extracellular matrix (ECM) production toward rational scaffold design. Poly(ethylene glycol) diacrylate (PEGDA) hydrogels were selected for this study since their material properties, including mechanical properties, mesh size, degradation rate and bioactivity, can be tightly controlled and systematically modified. Porcine VFF were encapsulated …

A Heuristic Scheduling Scheme In Multiuser Ofdma Networks, Zheng Sun, Zhiqiang He, Ruochen Wang, Kai Niu

Zheng Sun

Conventional heterogeneous-traffic scheduling schemes utilize zero-delay constraint for real-time services, which aims to minimize the average packet delay among real-time users. However, in light or moderate load networks this strategy is unnecessary and leads to low data throughput for non-real-time users. In this paper, we propose a heuristic scheduling scheme to solve this problem. The scheme measures and assigns scheduling priorities to both real-time and non-real-time users, and schedules the radio resources for the two user classes simultaneously. Simulation results show that the proposed scheme efficiently handles the heterogeneous-traffic scheduling with diverse QoS requirements and alleviates the unfairness between real-time …