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Articles 20521 - 20550 of 27518
Full-Text Articles in Engineering
Unified Messaging Systems: An Evolutionary Overview, Declan Barber
Unified Messaging Systems: An Evolutionary Overview, Declan Barber
The ITB Journal
Over the last decade, the widespread demand and use of the internet has changed the direction of the telecommunications industry as it was recognised that the internet could be used as an inexpensive way to handle not only data but also voice communications. This convergence of traditional voice and data technologies towards an IP-based open architecture has been paralleled by a convergence of the internet and mobile communications. As a result of these convergences, unified messaging has emerged as a technically viable service. Integrated messaging services that offer partial unification of different message types are already in the marketplace. This …
Hardware And Software Codesign For Multimedia Capable Portable Devices Using Systemc, Richard Gallery, Deepesh Shakya
Hardware And Software Codesign For Multimedia Capable Portable Devices Using Systemc, Richard Gallery, Deepesh Shakya
The ITB Journal
Multimedia capable portable devices such as 3G phones will host a variety of new applications. Although the underlying push for new applications in such devices is driven by the increase in bandwidth offered by 3G, it is clear that many of the “new” applications will require the provision of new and powerful graphics/video technology within the mobile device itself. Within a computing device, high bandwidth and computational cost are associated with anything but the simplest of graphics, and as a result the graphics subsystem is generally one of the most critical elements of a system, requiring particular attention in the …
Non Deterministic Processing In Neural Networks : An Introduction To Multi-Threaded Neural Networks, Stephen Sheridan
Non Deterministic Processing In Neural Networks : An Introduction To Multi-Threaded Neural Networks, Stephen Sheridan
The ITB Journal
Since McCullough and Pitts first published their work on the Binary Decision Neuron much research has been accumulated in the area of neural networks. This work has for the most part centred on network topologies and learning algorithms. The neural networks that have found their way into devices such as handheld PC’s are the fruit of NN research that has spanned 57 years. There is a simplistic beauty in the way that artificial neural networks model the biological foundations of the human thought process, but one piece of the jigsaw puzzle is still missing. We have so far been unable …
Extending Physical Simulation To The Audio Domain, Graham Mccann, Hugh Mccabe
Extending Physical Simulation To The Audio Domain, Graham Mccann, Hugh Mccabe
The ITB Journal
Using physical simulation to control movement and interactions between objects in a 3D environment, such as a computer game, has become increasingly common However; this idea has not been extended in a general sense to the audio domain. The audio component of these systems usually comprises of pre-recorded WAV files that are triggered in response to events. We argue that this approach has serious limitations and propose instead that the physical information made available by physics engines provides an opportunity to carry out synthesis of appropriate sounds from scratch. We outline a framework for adding a sound synthesis module to …
Web Services Technology Infrastructure, Geraldine Gray, Kieran O’Connor, Geraldine Gray
Web Services Technology Infrastructure, Geraldine Gray, Kieran O’Connor, Geraldine Gray
The ITB Journal
Web Services using eXtensible Markup Language (XML) based standards are becoming the new archetype for enabling business to business collaborations. This paper describes the conceptual architecture and semantics of constructing and consuming Web Services. It describes how Web Services fit into the enterprise application environment. It discusses Web Services security. Finally, it outlines the flaws of Web Services in their current state.
An Xml Framework For The Structured Data Exchange Between Medical Devices, Ulrich Neuhaus, Paul Walsh
An Xml Framework For The Structured Data Exchange Between Medical Devices, Ulrich Neuhaus, Paul Walsh
The ITB Journal
This paper describes an XML framework for the exchange of data between medical devices and software systems. XML technologies offer an extensible data format, which is easy to both create and process and simplifies the exchange of data. Different XML standards are defined within the framework in order to provide a practical solution for both device manufacturers and software developers. The structure and benefits of XML documents are discussed and an XML framework for ophthalmology is described.
Longer Than A Telephone Wire - Voice Firewalls To Counter Ubiquitous Lie Detection, Carl Reynolds, Matt Smith, Mark Woodman
Longer Than A Telephone Wire - Voice Firewalls To Counter Ubiquitous Lie Detection, Carl Reynolds, Matt Smith, Mark Woodman
The ITB Journal
Mobile computing and communication devices are open to surreptitious privacy attacks using emotion detection techniques; largely utilising work carried out in the area of voice stress analysis (VSA). This paper extends some work in the area of removing emotion cues in the voice, specifically focusing on lie detection and presents the results of a pilot study indicating that the use of mobile phones in situations of stress is common and that awareness of VSA is low. Existing strategies for the removal or modification of emotion cues, based on models of synthesis are considered and weaknesses are identified.
A Java Framework For Computer Vision, Stephen Sheridan
A Java Framework For Computer Vision, Stephen Sheridan
The ITB Journal
This paper outlines a framework implemented entirely in Java that attempts to give students exposure to computer vision systems from a practical standpoint. Various tools and technologies are introduced that will allow a student to acquire an input image through a WebCam, extract useful information from that input image and finally, attempt to make sense of the input.
Globalcom, Declan Barber, Conor Gildea, Gavin Byrne
Globalcom, Declan Barber, Conor Gildea, Gavin Byrne
The ITB Journal
The objective of this developed application is to provide a company with a means of communicating with its employees no matter where they are physically located and what communication resources they may have at any particular time. The core focus of this application is to provide a Unified Messaging System using synchronous and asynchronous forms.
Identification Protocols In Cryptography, Michael O’Donnell
Identification Protocols In Cryptography, Michael O’Donnell
The ITB Journal
In this paper we examine the role of Identification Protocols in the field of Cryptography. Firstly, the rationale behind the need for Identification Protocols is discussed. Secondly, we examine, in detail, challenge-response protocols, based upon zero-knowledge proofs, that form a subset of Identification Protocols in general. Thirdly, the mathematical tools necessary for the understanding of how these protocols work is given. Finally, we discuss four main Identification Protocols: Fiat-Shamir, Feige-Fiat-Shamir, Schnorr and Guillou- Quisquater. This discussion includes the theory, practical examples and the security aspects of each protocol.
Internet Applications Development Issues And Strategic Considerations, Róisín Faherty
Internet Applications Development Issues And Strategic Considerations, Róisín Faherty
The ITB Journal
This paper examines the development issues and strategic considerations involved in Internet Applications Development. The prevalent development environments are discussed highlighting their advantages and disadvantages. Issues regarding the development of Internet applications are viewed under the headings of human resource, organizational, technological, investment and Legal Issues. Lastly the paper gives an overview of the strategic implications for an organization considering the development of Internet Applications. These include security, quality and the look & feel of the application. This paper is not intended as a definitive resource on the area of Internet Applications Development, its aim is to highlight the areas …
Mental Spaces: Processes For Establishing And Linking Spaces, Brian Nolan
Mental Spaces: Processes For Establishing And Linking Spaces, Brian Nolan
The ITB Journal
This paper reviews the theory of mental spaces as expounded by Fauconnier (1994). In this work he posits a theory in which reference has a structural dimension. Within the theory, this structure is represented using spaces, connectors across the spaces and some general principles that are found to apply. The complexity lies in the interaction between the principles and in the contextual structures that feed into the principles for interpretation. Brugman, in her 1996 paper, makes use of insights from mental spaces theory to conduct an analysis of HAVE-constructions. She notes that Fauconnier has “elaborated a theory of partial possible …
A Review Of Parallel Mappings For Feed Forward Neural Networks Using The Backpropagation Learning Algorithm, Stephen Sheridan
A Review Of Parallel Mappings For Feed Forward Neural Networks Using The Backpropagation Learning Algorithm, Stephen Sheridan
The ITB Journal
The Back-Propagation (BP) Neural Network (NN) is probably the most well known of all neural networks. Many mappings of the BP NN have been implemented for both special purpose and general-purpose computers. This mapping process can fall into one of two categories: heuristic mapping and algorithmic mapping. Heuristic mapping concentrates on the architecture and behaviour of the network as it trains whereas algorithmic mapping concentrates on the parallelization of the learning algorithm. Mappings in the heuristic category tend to take a trial and error approach based on the understanding of the network and of the target machine. In comparison mappings …
The Role Of Cryptography In Security For Electronic Commerce, Ann Murphy, David Murphy
The Role Of Cryptography In Security For Electronic Commerce, Ann Murphy, David Murphy
The ITB Journal
Many businesses and consumers are wary of conducting business over the Internet due to a perceived lack of security. Electronic business is subject to a variety of threats such as unauthorised access, misappropriation, alteration and destruction of both data and systems. This paper explores the major security concerns of businesses and users and describes the cryptographic techniques used to reduce such risks.
Quantifying The Information Habits Of High School Students Engaged In Engineering Design, Nathan Mentzer, Michael J. Fosmire
Quantifying The Information Habits Of High School Students Engaged In Engineering Design, Nathan Mentzer, Michael J. Fosmire
Journal of Pre-College Engineering Education Research (J-PEER)
stract This study measured the information gathering behaviors of high school students who had taken engineering design courses as they solved a design problem. The authors investigated what types of information students accessed, its quality, when it was accessed during the students’ process, and if it impacted their thinking during the activity. Students overwhelmingly relied on internet searching to acquire information, rather than printed materials available to them. The sites they found were generally popular rather than technical, and persuasive (i.e., trying to sell something) rather than informative. The high school students understood the need for information, as they sought …
Effect Of An Engineering Camp On Students’ Perceptions Of Engineering And Technology, Rebekah Hammack, Toni A. Ivey, Juliana Utley, Karen A. High
Effect Of An Engineering Camp On Students’ Perceptions Of Engineering And Technology, Rebekah Hammack, Toni A. Ivey, Juliana Utley, Karen A. High
Journal of Pre-College Engineering Education Research (J-PEER)
Students’ knowledge about a profession influences their future decisions about careers. Research indicates that students tend to hold stereotypical views of engineers, which would hinder engineering as a career choice. The purpose of this study was to measure how participating in a week long engineering summer camp affected middle school students’ (N519) attitudes towards engineering and their conceptions of engineering and technology. Results indicate that participation in the programs had a positive impact on the students’ understandings of what technology is and the work engineers do. Although the results indicate a positive impact on participants, it is not clear which …
Teacher Beliefs About Motivating And Teaching Students To Carry Out Engineering Design Challenges: Some Initial Data, James P. Van Haneghan, Susan A. Pruet, Rhonda Neal-Waltman, Jessica M. Harlan
Teacher Beliefs About Motivating And Teaching Students To Carry Out Engineering Design Challenges: Some Initial Data, James P. Van Haneghan, Susan A. Pruet, Rhonda Neal-Waltman, Jessica M. Harlan
Journal of Pre-College Engineering Education Research (J-PEER)
The present study examines middle school teachers’ beliefs about seven learning outcomes related to a project that involves developing and examining the effects of a set of engineering design modules constructed for use by middle school math and science teachers. Overall, the teachers involved in the intervention appear to believe they have the instructional skills, professional development, and resources to carry out the modules. Teachers from all of the schools (both intervention and comparison schools) for the most part valued the outcomes as important. Results of the study indicate that, although teachers believe they value and can obtain most of …
Xml For Business To Business Data Exchange, Geraldine Gray, David Kerwick
Xml For Business To Business Data Exchange, Geraldine Gray, David Kerwick
The ITB Journal
This paper examines to use of XML for business to business data exchange. Starting with creating an XML document from an existing data source and transmitting that document, we explain some of the supporting standards for XML which facilitate automated processing and transformation of an XML document. Finally we look at the advantages of using XML, and why it is expected to revolutionise electronic data interchange.
Agv Controlled Fms, Fergus G. Maughan
Agv Controlled Fms, Fergus G. Maughan
The ITB Journal
One of the key factors that prevent the implementation of Flexible Manufacturing Systems (FMS) is the elaborate cost associated with the control software. In a FMS there is often a wide range of equipment such as personal computers Programmable Logical Controllers (PLCs), CNC Machines or robots, each of these having their own “intelligence” and library of data. Providing a means of communication between these individual controllers has traditionally been achieved using a Local Area Network (LAN). This proves more expensive when traditional manual operated machines have to be integrated into the system. The model described in this paper provides an …
Fuzzy Logic And Neural Networks - A Glimpse Of The Future, Raymond Manley
Fuzzy Logic And Neural Networks - A Glimpse Of The Future, Raymond Manley
The ITB Journal
In 1965 Lofti Zadeh published his paper on fuzzy set theory , putting it forward as a way of more closely realising the human thought process. Many systems developed to aid human activities have been based on definitive , yes/no, type decision making processes. An example is the way all computers are based on the binary logic system where only two possible and separate logic levels are allowed, a logic 1 or logic 0. However, we know from everyday experience that humans think in terms of vague linguistic categories, for example, the weather is fairly good today. "Fairly good" represents …
Engineering Student Featured In Magazine: Internship Lands Student In Engineering Publication, Danni Francis
Engineering Student Featured In Magazine: Internship Lands Student In Engineering Publication, Danni Francis
Andrews Agenda: Campus News
Andrews University electrical engineering student, Philip Taylor Coleman, participated in a prestigious internship with The National Academy of Engineering (NAE) and was featured in their magazine.
The Impact Of The First Officer Qualification Ruling: Pilot Performance In Initial Training, Nancy R. Shane
The Impact Of The First Officer Qualification Ruling: Pilot Performance In Initial Training, Nancy R. Shane
Journal of Aviation Technology and Engineering
The intent of the First Officer Qualification (FOQ) ruling was to improve the quality of first officers flying for Part 121 carriers. In order to test this, a study was completed at a regional carrier to compare pilots hired prior to the FOQ ruling with those hired after the FOQ ruling. The study compared 232 pilots hired from 2005–2008 with 184 pilots hired from August 2013–November 2014. The pilots’ date of hire as compared to the date the FOQ ruling went into effect defined the input (Source) variable. Initial training defined the output (Success) variables. The airline name and all …
Sulfonated-Graphene/Nafion Composite Membrane For All Vanadium Redox Flow Batteries, Da-Wei Yang, Yan-Qing Dong, Jing-Min Fan, Ming-Sen Zheng, Quan-Feng Dong
Sulfonated-Graphene/Nafion Composite Membrane For All Vanadium Redox Flow Batteries, Da-Wei Yang, Yan-Qing Dong, Jing-Min Fan, Ming-Sen Zheng, Quan-Feng Dong
Journal of Electrochemistry
Nafion membrane has been widely used in fuel cells due to its good proton conductivity, chemical and mechanical stabilities. However, the well-developed water channels in Nafion membrane have restricted its application in all vanadium redox flow batteries owing to the high permeation of vanadium ions and the cost. In this work, the water adsorption rate, resistivity and transference number of vanadium ions of sulfonated-graphene/Nafion composite membrane were investigated and compared with those of Nafion membrane in an effort to overcome the abovementioned drawbacks. It was found that the area resistivity and permeation rate of sulfonated-graphene/Nafion composite membrane were significantly reduced …
Research Progress Of Secondary Sodium-Air Batteries, San-Pei Zhang, Zhao-Yin Wen, Jun Jin, Xiang-Wei Wu, Ying-Ying Hu, Mei-Fen Wu
Research Progress Of Secondary Sodium-Air Batteries, San-Pei Zhang, Zhao-Yin Wen, Jun Jin, Xiang-Wei Wu, Ying-Ying Hu, Mei-Fen Wu
Journal of Electrochemistry
Rechargeable sodium-air batteries have been the focus in the fields of batteries and energy storage recently, owing to their high specific energy density (1600 Wh·kg-1), an equilibrium discharge potential of 2.3 V and earth-abundant sodium element However, research on sodium-air cells is still in an infant age and presents many scientific issues. Based on recently reported work and our own experience on sodium-based batteries, this review summarizes the research progress related to the critical scientific is sues of secondary sodium-air batteries and the application prospect of sodium-air battery.
Latest Progresses In Vanadium Flow Battery Technologies And Applications, Xiao-Li Wang, Yu Zhang, Hua-Min Zhang
Latest Progresses In Vanadium Flow Battery Technologies And Applications, Xiao-Li Wang, Yu Zhang, Hua-Min Zhang
Journal of Electrochemistry
With virtues of high safety, long cycle life, friend environment and state of charge easy monitoring, vanadium flow battery has become an effective technique for large scale energy storage. United States, Japan, Europe and other developed countries are actively promoting the developments of vanadium flow battery technology and related equipments. In this paper, the performance of containerized vanadium flow battery, which was newly developed by Rongke Power (RKP) and Dalian Institute of Chemical Physics, was introduced. The operation data of 5 MW/10 MWh vanadium flow battery energy storage station was displayed. Finally, it is pointed out that reducing the cost, …
Development Of Proton Conduction Membranes In Application Of Vanadium Flow Battery, Le-Tu Qingge, Wei-Nan Guo, Ping Liu, Bao-Guo Wang
Development Of Proton Conduction Membranes In Application Of Vanadium Flow Battery, Le-Tu Qingge, Wei-Nan Guo, Ping Liu, Bao-Guo Wang
Journal of Electrochemistry
The polymeric hydrophilic/hydrophobic interactions into membrane formation were introduced. A general and straightforward strategy for preparing membranes with nanometer-scale pores was suggested by utilization of hydrophilic/hydrophobic interactions to generate phase separation and removal of polyion aggregates through water immersion. Poly(vinylidene fluoride) (PVDF) and sodium allyl sulfonate (SAS) serve as the membrane material and pore-generator, respectively, resulting in chemically stable and oxidation-resistant membranes with various potential applications. Following the same procedure invented to produce the laboratory-scale membranes, the scale-up process to manufacture large-area membranes was completed. The obtained membrane exhibited the conductivity of 3.5×10-2 S•cm-1, thickness of 100 …
Review For Applications Of "Lead Carbon" Batteries In Energy Storage System, Yong-Quan Ma, Ke Ke, Da-Ming Gu
Review For Applications Of "Lead Carbon" Batteries In Energy Storage System, Yong-Quan Ma, Ke Ke, Da-Ming Gu
Journal of Electrochemistry
Three types of “lead carbon” batteries are introduced by comparing their advantages and disadvantages. Then their applications in energy storage system (ESS), especially in the field of renewable energy power generation, are discussed. The prospects and potential applications of “lead carbon” batteries in EES for electric power supply system are analyzed by combining the state-of-the-art techniques in this field.
Preparations And Properties Of Polybenzimidazole/Polyvinylbenzyl Crosslinked Composite Membranes For High Temperature Proton Exchange Membrane Fuel Cells, Jin-Kai Hao, Yong-Yi Jiang, Zhen Wang, Xiao-Jin Li, Zhi-Gang Shao, Bao-Lian Yi
Preparations And Properties Of Polybenzimidazole/Polyvinylbenzyl Crosslinked Composite Membranes For High Temperature Proton Exchange Membrane Fuel Cells, Jin-Kai Hao, Yong-Yi Jiang, Zhen Wang, Xiao-Jin Li, Zhi-Gang Shao, Bao-Lian Yi
Journal of Electrochemistry
In order to increase the chemical stability of polybenzimidazole (PBl) membrane, a highly stable polymer, poly vinyl. benzyl chloride (PVBC), was chosen as the macromolecular crosslinker, and 1H-1,2,4-triazol was adopted to prepare the crosslinked PBI-based membranes. The influence of the PVBC amount on membrane characteristic was investigated in detail. The results indi. cated that the crosslinked structure of the membrane effectively improved the chemical stability, and at the same time, the mem. brane presented good mechanical property and proton conductivity. The fuel cell performance for the membrane was tested with hy. drogen and oxygen single cell without humidification at 150 …
Effects Of Microstructures Of Active Material On Performance Of Vrla Battery, Lei Jiang, Shou-Zhong Yi
Effects Of Microstructures Of Active Material On Performance Of Vrla Battery, Lei Jiang, Shou-Zhong Yi
Journal of Electrochemistry
The structure, morphology and content of the as-prepared and the processed samples were characterized by the means of SEM and XRD. The discharge capacities and cycle life performances of the as-prepared and the processed samples were tested by electrochemical measurements with different rates. The results indicated that the 4BS technology which can affect the plate design, deep cycle capability and cycle life is a basic technology for the VRLA batteries. It was also confirmed that the contents and structures of α-PbO2 and β-PbO2 formed with different processing conditions can affect the performance of the VRLA batteries, suggesting that …