The University of Ontario Institute of Technology is a public research university located in Oshawa, Ontario, Canada. The university shares its campus with Durham College. The university was founded in 2002 and accepted its first students in 2003, making it one of Canada's newest universities. The enabling legislation is the University of Ontario Institute of Technology Act, 2002. All undergraduate programs require students to lease a laptop PC from the university as a condition of enrollment, making it Ontario's only laptop-based university. Faculty members also encourage students to use their laptops to complete assignments, perform laboratory research and interact with faculty during lectures. UOIT offers a range of undergraduate programs, and graduate programs in Science, Engineering, Health and Information Technology. The UOIT campus is approximately 400 acres in the northern part of Oshawa. Wikipedia.
Rosen M.A.,University of Ontario Institute of Technology
Energy | Year: 2010
Hydrogen demand as an energy currency is anticipated to rise significantly in the future, with the emergence of a hydrogen economy. Hydrogen production is a key component of a hydrogen economy. Several production processes are commercially available, while others are under development including thermochemical water decomposition, which has numerous advantages over other hydrogen production processes. Recent advances in hydrogen production by thermochemical water decomposition are reviewed here. Hydrogen production from non-fossil energy sources such as nuclear and solar is emphasized, as are efforts to lower the temperatures required in thermochemical cycles so as to expand the range of potential heat supplies. Limiting efficiencies are explained and the need to apply exergy analysis is illustrated. The copper-chlorine thermochemical cycle is considered as a case study. It is concluded that developments of improved processes for hydrogen production via thermochemical water decomposition are likely to continue, thermochemical hydrogen production using such non-fossil energy will likely become commercial, and improved efficiencies are expected to be obtained with advanced methodologies like exergy analysis. Although numerous advances have been made on sulphur-iodine cycles, the copper-chlorine cycle has significant potential due to its requirement for process heat at lower temperatures than most other thermochemical processes. © 2009 Elsevier Ltd. All rights reserved.
Lin X.,University of Ontario Institute of Technology
IEEE Journal on Selected Areas in Communications | Year: 2013
Privacy-preserving Vehicular Peer-to-Peer Network (VPNET) is particularly vulnerable to sybil attack, where a malicious vehicle can abuse its multiple unlinkable pseudo-ids to pretend multiple and distinct vehicles in the network. To make the matter even worse, due to the privacy-preserving network environment, zero-day sybil vulnerability is hard to defend against, i.e., a vehicle cannot locally detect a sybil attacker before the attacker is formally revoked. In this paper, aiming at mitigating zero-day sybil vulnerability in privacy-preserving VPNET, we propose an efficient Local Sybil Resistance scheme, called LSR, to locally detect sybil attack. Especially, in the proposed LSR scheme, if a vehicle never signs an event more than once, the signatures it signed cannot be linked, and its privacy can be well protected. However, if a vehicle signs two or more signatures on the same event, any vehicle can easily link these signatures and thus detect a sybil attack locally. Moreover, with two-layer/multi-layer reporting, a sybil attack can be quickly reported to a trusted authority (TA) for tracking the sybil attacker's real identity and making global revocation. Detailed security analysis demonstrates that the proposed LSR scheme can enhance the security of a privacy-preserving VPNET, such as locally detecting sybil attack, preventing a sybil attacker's future attacks before its being revoked by TA, et al. In addition, performance evaluation via extensive simulations also confirms the high effectiveness of the proposed LSR scheme. © 2013 IEEE.
Ammam M.,University of Ontario Institute of Technology
RSC Advances | Year: 2012
Classical electrophoretic deposition (EPD) relies on continuous direct current (CDC) to deposit charged particles on electrodes. In recent decades, modulated electric fields such as pulsed direct current (PDC) and alternating current (AC) have been investigated. This paper reviews EPD under these modulated electric fields and major applications of the deposited microstructures. The paper starts with a short overview of EPD principals such as the electrical double layer of the charged particle, electrophoretic mobility and main suspension parameters including zeta potential, particle size, conductivity, viscosity and stability of the suspension. The EPD mechanisms from the earliest model reported by Hamaker and Verwey to latest models including Sarkar and Nicholson model and influence of the electrohydrodynamics and electroosmosis as well as electrode surface and its electrochemical double layer on the deposition process have been briefly discussed. Two categories of modulated electric fields, PDC and AC fields have been addressed with their advantages and disadvantages. It is found that compared to CDC, PDC offers the advantage of: i) reducing the coalescence between gas bubbles induced by water electrolysis from aqueous suspensions, hence yielding deposition of smooth and uniform coatings, ii) reducing aggregation and disaggregation of nanometer sized particles, leading to formation of uniform and homogenous deposits and, iii) PDC generates low change in pH near the electrode, thus it is convenient for deposition of biochemical and biological species in their highly active states. The main disadvantage of PDC over CDC lies in the decrease of the deposition yield. The latter can be more pronounced if low time-pulses are used. Various categories of AC signals including symmetrical fields with no net DC component and asymmetrical AC signals without and with net DC component have been discussed. Overall, the deposition rate under AC fields increases with polarization time and amplitude. With respect to frequency, the deposition rate increases with frequency up to certain value then drops at elevated frequencies. It is noted that deposition under AC signals offers the possibility to produce superior quality coatings from aqueous suspensions because electrolysis of water as well as particle orientation during the deposition could be controlled. From the application standpoint, PDC and AC, offers new application perspectives such as in biotechnology. Because under modulated electric fields, EPD can now be accomplished from aqueous suspensions with low water electrolysis rates, a variety of biochemical and biological species can be deposited to yield highly active layers suitable for a wide range of applications including biosensors, biofuel cells and bioreactors. This journal is © 2012 The Royal Society of Chemistry.
Kay R.H.,University of Ontario Institute of Technology
Computers in Human Behavior | Year: 2012
The purpose of this article was to provide a comprehensive review of research on video podcasts from 2002 to 2011 in order to guide future studies and educational practice. Fifty-three, peer-reviewed articles were selected from an extensive search of the literature. Key topics included the history and growth of video podcasts, types of podcasts, previous literature reviews, benefits and challenges of using video podcasts, methodological concerns, and suggestions for future research. Key benefits included positive affective and cognitive attitudes toward video podcasts, control over learning, improved study habits, and increased learning performance. Key challenges included a variety of technical problems, preference of some students for lectures, and reduced class attendance. Methodological concerns involved insufficient description of video podcasts examined, limited sample selection and description, and the absence of reliability and validity estimates for data collection tools. Suggestions for future research include focusing on the quality and design of video podcasts, pedagogical strategies, viewing patterns and impact on learning effectiveness, and in individual differences in video podcast use. © 2012 Elsevier Ltd. All rights reserved.
Ammam M.,University of Ontario Institute of Technology
Journal of Materials Chemistry A | Year: 2013
Today, sensing represents one of the key topics in current science and technology. Polyoxometalates (POMs), which are defined as early transition metal clusters, are considered as one of the most growing fields of research and development in sensing. This paper discusses the promising prospects of POMs in sensing. The paper starts with brief definitions about the formation of POMs. The two basic structures of POMs, Keggin and Dawson, as well as some combined structures are discussed. The interesting properties of POMs particularly as acid catalysts, in medicine, in redox chemistry and in magnetism are briefly mentioned. The main methods used for the deposition of POMs on solid supports (substrates) including chemisorption, electrodeposition, encapsulation in polymers and sol-gels, immobilization using the Langmuir-Blodgett process, layer by layer assemblies as well as deposition via formation of hybrid POM-organic moieties are discussed with their advantages and disadvantages. Finally, the potential applications of immobilized POMs on solid substrates as sensors for the detection and determination of analytes both in liquid and in the gas phase are addressed and compared. This journal is © The Royal Society of Chemistry 2013.
Dincer I.,University of Ontario Institute of Technology
International Journal of Hydrogen Energy | Year: 2012
This paper discusses environmentally benign and sustainable, as green, methods for hydrogen production and categorizes them based on the driving sources and applications. Some potential sources are electrical, thermal, biochemical, photonic, electro-thermal, photo-thermal, photo-electric, photo-biochemical, and thermal-biochemical. Such forms of energy can be derived from renewable sources, nuclear energy and from energy recovery processes for hydrogen production purposes. These processes are analyzed and assessed for comparison purposes. Various case studies are presented to highlight the importance of green hydrogen production methods and systems for practical applications. © 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
University of Ontario Institute of Technology | Date: 2013-11-12
Systems, methods, and devices for producing hydrogen and capturing CO2 from emissions combine both H2 production and CO2 capture processes in forms of thermochemical cycles to produce useful products from captured CO2. The thermochemical cycles are copper-chlorine (CuCl) and magnesium-chlorine-sodium/potassium cycles (MgCINa/KCO2). One system comprises a CuCl cycle, a CO2 capture loop, and a hydrogenation cycle. Another system comprises an MgCINa/KCO2 cycle and a hydrogenation cycle. Devices for hydrogen production, CO2 capture, hydrogenation, and process and equipment integration include a two-stage fluidized/packed bed, hybrid two-stage spray-fluidized/packed bed reactor, a two-stage wet-mode absorber, a hybrid two-stage absorber, and a catalyst packed/fluidized bed reactor.
University of Ontario Institute of Technology | Date: 2013-05-31
This invention is related to authentication schemes utilizing advertising video-passwords, which require the user to watch and remember parts of a given advertisement video. Different embodiments of the invention can utilize just time reference point information, or can optionally include grid element, click point, tag phrase, or a combination of both click point and tag phrase information. A reference video-password is defined based on the time reference point information, and optionally with grid element, click point, or tag phrase information. Subsequently, the user will attempt authentication and the candidate video-password will be defined with the associated time reference point determined from the users input, and optionally with grid element, click point, or tag phrase information received from the user. The system would then authenticate the user based on the comparison result between the reference video-password and the candidate video-password.
University of Ontario Institute of Technology | Date: 2013-09-13
Sulfonated silane ionomeric materials useful in electrodes of e.g., membrane electrode assemblies (MEA) of fuel cells can improve cell performance. MEAs prepared with CCE cathode catalyst layers and standard ELAT anode layers over a period of several start-stop cycles, as well as at multiple relative humidities were studied. The MEA performance was monitored using cyclic voltammetry, electrochemical impedance spectroscopy, and fuel cell polarization curves. The CCE cathode materials appeared to maintain performance and had improved water management capabilities at comparatively low relative humidities.
University of Ontario Institute of Technology | Date: 2015-07-07
Embodiments relate generally to access control, and more particularly to systems and methods for providing access control based on user intent. An intent-based access control method is provided comprising: receiving, from a user, a request to gain access to a protected resource; presenting stimuli to the user to evoke a physiological or behavioral response at one or more time points or time periods; receiving a signal of the physiological or behavioral response, the one or more physiological signals associated with one or more time codes that correspond to the one or more time points or time periods for the presenting of the stimuli; processing the received signal to assess an intention of the user; and in response to the processing, selectively granting the user access to the protected resource. Various systems, methods, and non-transitory computer-readable media are also described.