Physical Sciences and Mathematics Commons^™

Graduate Certificates In Coastal Studies And Marine And Coastal Climate Change, Nova Southeastern University

Halmos College of Natural Sciences and Oceanography Course Catalogs

No abstract provided.

Oceanography Center Course Catalog 2010-2011, Nova Southeastern University

Halmos College of Natural Sciences and Oceanography Course Catalogs

No abstract provided.

Quantum Algorithm Animator, Lori Eileen Nicholson

CCE Theses and Dissertations

The design and development of quantum algorithms present a challenge, especially for inexperienced computer science students. Despite the numerous common concepts with classical computer science, quantum computation is still considered a branch of theoretical physics not commonly used by computer scientists. Experimental research into the development of a quantum computer makes the use of quantum mechanics in organizing computation more attractive, however the physical realization of a working quantum computer may still be decades away.

This study introduces quantum computing to computer science students using a quantum algorithm animator called QuAL. QuAL's design uses features common to classical algorithm animators …

Trust And Trustworthiness: A Framework For Successful Design Of Telemedicine, James Robert Templeton

CCE Theses and Dissertations

Trust and its antecedents have been demonstrated as a barrier to the successful adoption of numerous fields of technology, most notably e-commerce, and may be a key factor in the lack of adoption or adaptation in the field of telemedicine. In the medical arena, trust is often formed through the relationships cultivated over time via clinician and patient. Trust and interpersonal relationships may also play a significant role in the adoption of telemedicine. The idea of telemedicine has been explored for nearly 30 years in one form or another. Yet, despite grandiose promises of how it will someday significantly improve …

Bathymetric Attributed Grids (Bags): Discovery Of Marine Datasets And Geospatial Metadata Visualization, Kurt Schwehr, Andy Armstrong, Rick T. Brennan, David Fischman, Jon Sellars, Shep M. Smith Lt

Center for Coastal and Ocean Mapping

No abstract provided.

Free-Standing And Reactive Thin Films Fabricated By Covalent Layer-By-Layer Assembly And Subsequent Lift-Off Of Azlactone-Containing Polymer Multilayers, Maren E. Buck, David M. Lynn

Chemistry: Faculty Publications

We report an approach to the fabrication of free-standing and amine-reactive thin films that is based on the reactive layer-by-layer assembly and subsequent lift-off of azlactone-containing polymer multilayers. We demonstrate that covalently cross-linked multilayers fabricated using the azlactone-functionalized polymer poly(2-vinyl-4,4-dimethylazlactone) (PVDMA) and a primary amine-containing polymer [poly(ethyleneimine) (PEI)] can be delaminated from planar glass and silicon surfaces by immersion in mildly acidic aqueous environments to yield flexible freestanding membranes. These free-standing membranes are robust and can withstand exposure to strong acid, strong base, or incubation in high ionic strength solutions that typically lead to the disruption and erosion of polymer …

Observation Of Long-Range, Near-Side Angular Correlations In Proton-Proton Collisions At The Lhc, Vardan Khachatryan, Marc M. Baarmand, B. Dorney, Samir Guragain, Marcus Hohlmann, H. Kalakhety, Robert M. Ralich, Igor Vodopiyanov, The Cms Collaboration

Aerospace, Physics, and Space Science Faculty Publications

Results on two-particle angular correlations for charged particles emitted in proton-proton collisions at center-of-mass energies of 0.9, 2.36, and 7TeV are presented, using data collected with the CMS detector over a broad range of pseudorapidity (η) and azimuthal angle (φ). Short-range correlations in Δη, which are studied in minimum bias events, are characterized using a simple "independent cluster" parametrization in order to quantify their strength (cluster size) and their extent in η (cluster decay width). Long-range azimuthal correlations are studied differentially as a function of charged particle multiplicity and particle transverse momentum using a 980 nb -1 data set at …

Challenges Of Utilizing E-Learning Systems In Public Universities In Jordan, M. Al-Shboul, Izzat M. Alsmadi

Computer Science Faculty Publications

This research paper lists and discusses major challenges and barriers that may face faculty members at the public universities in Jordan in employing e-Learning systems authoring tools in their instructions. It also proposes several suggestions for the administrators in public universities in Jordan for what they could do to improve the utilization of e-Learning authoring tools at their campuses. E-Learning systems authoring tools allow instructors to easily create and deliver their e-contents and e-lectures. Furthermore, online course materials which uploaded by using such authoring tools could be viewed by any popular web browser system.

Chandra Observations Of The Radio Galaxy 3c 445 And The Hot Spot X-Ray Emission Mechanism, Eric S. Perlman, Markos Georganopoulos, Emily M. May, Deosthenes Kazanas

Aerospace, Physics, and Space Science Faculty Publications

We present new Chandra observations of the radio galaxy 3C 445, centered on its southern radio hot spot. Our observations detect X-ray emission displaced upstream and to the west of the radio-optical hot spot. Attempting to reproduce both the observed spectral energy distribution and the displacement excludes all one-zone models. Modeling of the radio-optical hot spot spectrum suggests that the electron distribution has a low-energy cutoff or break approximately at the proton rest mass energy. The X-rays could be due to external Compton scattering of the cosmic microwave background coming from the fast (Lorentz factor Γ ≈ 4) part of …

Associations Between Fermi Gamma-Ray Burst Monitor Terrestrial Gamma Ray Flashes And Sferics From The World Wide Lightning Location Network, Valerie Connaughton, Eric S. Cramer, Joseph R. Dwyer

Aerospace, Physics, and Space Science Faculty Publications

We report on a search for correlations between terrestrial gamma ray flashes (TGFs) detected by the Fermi Gamma-ray Burst Monitor (GBM) and lightning strokes measured using the World Wide Lightning Location Network (WWLLN). We associate 15 of a total 50 GBM-detected TGFs with individual discharges. We establish the relative timing between the TGF and the lightning stroke to an accuracy of <50 s, and find that in 13 of these 15 lightning-TGF associations, the lightning stroke and the peak of the TGF are simultaneous to ∼40 μs. This suggests that a large fraction of TGFs are coincident with lightning discharges. The two nonsimultaneous associations do not show a consistent TGF-lightning stroke temporal sequence. All 15 associations are with sferics within 300 km of the subspacecraft position. For those TGFs not correlated with a particular lightning stroke, we find storm activity within 300 km of the subspacecraft position in all but four of the TGFs. For three of these four TGFs, we find storm activity very close to one of the magnetic footprints of the spacecraft position. We associate the subspacecraft TGFs with gamma ray events and the footprint events with electrons traveling along magnetic field lines before hitting the Fermi spacecraft.

The Horizontal Electric Field Induced By A Lightning Return Stroke, S L. Meredith, S K. Earles, Niescja E. Turner

Physics and Astronomy Faculty Research

Problem statement: Develop a new formula which describes the horizontal electric field induced by a lightning return stroke in contact with an imperfect conductive surface. Approach: A new method for describing the horizontal electric field induced by a lightning return stroke will be presented. The method presented here had utilized an approach which purposely downplayed the physics of how image theory was employed in the presence of an imperfect conductive surface. It did so by adopting a technique which had focused on the geometry that existed between the lightning channel and surface ground. In doing so, new expressions …

The Magnetic Field Induced By A Lightning Strikes Indirect Effect Double Exponential Current Waveform, S L. Meredith, S K. Earles, I N. Kostanic, Niescja E. Turner

Physics and Astronomy Faculty Research

Problem statement: Develop a new formula which describes the magnetic field induced by a lightning strike's indirect effect double exponential current waveform. Approach: A novel approach for developing a closed-form solution for the magnetic field from the indirect effect double exponential current waveform will be presented. In the literature, models typically employ the pulse waveform to derive the corresponding electromagnetic fields. However, given the Department of Defense (DoD) has incorporated the double exponential current waveform as part of their "Electromagnetic Environmental Effects Requirements For Systems", we felt it important to develop a solution for the magnetic field which …

A New Method To Describe Image Theory For An Imperfect Conductor, S L. Meredith, S K. Earles, Niescja E. Turner

Physics and Astronomy Faculty Research

Problem statement: Modify the equations associated with image theory in order to account for perfect and imperfect conductors. Approach: A novel approach for describing the application of image theory for an imperfect conductive surface was presented. The method presented here purposely downplays the physics of how image theory was employed to account for a charge which is in the presence of an imperfect conductive surface. In turn, it adopted an approach which focused on the geometry that existed between the charged particle and surface ground. In doing so, the proposed method formulated a solution that had minimized the …

Development And Testing Of A Work Measurement Tool To Assess Caregivers' Activities In Residential Aged Care Facilities, Esther Munyisia, Ping Yu, David Hailey

Faculty of Informatics - Papers (Archive)

The introduction of computerized information systems into health care practices may cause changes to the way healthcare workers conduct their routine work activities, such as work flow and the time spend on each activity. To date the available work measurement tools are confined to activities in hospitals and do not cover residential aged care facilities (RACFs). There is little evidence about the effects of technology on caregivers' work practices, including the distribution of time on activities in a RACF. This requires the measurement of caregivers' activities using a valid and reliable measurement tool. The contribution of this research is to …

A Multi-Method Approach To Evaluate Health Information Systems, Ping Yu

Faculty of Informatics - Papers (Archive)

Systematic evaluation of the introduction and impact of health information systems (HIS) is a challenging task. As the implementation is a dynamic process, with diverse issues emerge at various stages of system introduction, it is challenge to weigh the contribution of various factors and differentiate the critical ones. A conceptual framework will be helpful in guiding the evaluation effort; otherwise data collection may not be comprehensive and accurate. This may again lead to inadequate interpretation of the phenomena under study. Based on comprehensive literature research and own practice of evaluating health information systems, the author proposes a multimethod approach that …

Critical Factors For The Successful Introduction Of Information And Communication Technologies Into Health Care Organisations, Ping Yu, Hui Yu, Tracey Mcdonald

Faculty of Informatics - Papers (Archive)

The paper discusses critical factors for the successful introduction of information and communication technologies (ICT) into health care organisations. The proven evidence around the world suggests that introducing health ICT is a mutual transformation process that actively involves people, organisation and technology. The key people factors include personal attributes of the change agent, user ownership and positive user attitudes. The organisational facilitators are adequate funding, strong leadership and project management, integration of IT with work practices, managing change and end user expectations, and end user training and support. User friendly and useful systems can be achieved by involving both management …

Design An Automatic Appointment System To Improve Patient Access To Primary Health Care, Hongxiang Hu, Ping Yu, Jun Yan

Faculty of Informatics - Papers (Archive)

Advanced Access model has been introduced in general practice in the United States to improve patient access to primary health care services for more than ten years. It has brought in the benefits of eliminating service provider’s waiting lists, improving patients’ timely access to services and reducing no-show rate. However, to implement this model, practices need to collect relevant information, develop contingency plans and set up practice strategies to balance the provision of care and patient’s demand. These tasks are not always easy to achieve. Understanding the requirements and constraints for effective management of patient booking is essential for developing …

Fixed Rank Filtering For Spatio-Temporal Data, Noel Cressie, Tao Shi, Emily L. Kang

Faculty of Informatics - Papers (Archive)

Datasets from remote-sensing platforms and sensor networks are often spatial, temporal, and very large. Processing massive amounts of data to provide current estimates of the (hidden) state from current and past data is challenging, even for the Kalman filter. A large number of spatial locations observed through time can quickly lead to an overwhelmingly high-dimensional statistical model. Dimension reduction without sacrificing complexity is our goal in this article. We demonstrate how a Spatio-Temporal Random Effects (STRE) component of a statistical model reduces the problem to one of fixed dimension with a very fast statistical solution, a methodology we call Fixed …

An Intelligent Approach For Cost Minimization Of Power Generation, Ahmed M. A. Haidar, Ibrahim A. Ahmed, Norazila Jaalam

Faculty of Informatics - Papers (Archive)

Cost reduction is one of the main targets in power industry due to economic load dispatch problem and allocating loads to plants for minimum cost. The principal objective in economic dispatch of thermal generators in a power system is to determine the economic loadings of the generators so that the load demand can be met and the loadings are within the feasible operating regions of the generators. This study presents an optimization approach for fuel cost and power loss minimization based on genetic algorithm and particle swarm optimization methods. To demonstrate the global optimization power of the presented techniques, these …

The Effect Of Dvr Location For Enhancing Voltage Sag, Rohanim Ibrahim, Ahmed Haidar, Zahim M, Herbert Iu

Faculty of Informatics - Papers (Archive)

Recently, Dynamic Voltage Restorer (DVR) has become a popular power electronic device as a protection for sensitive loads from voltage sag. Voltage sag widely known as one of the major problem in power quality, it is defined as a short reduction of voltage from the nominal. DVR is a custom power device for voltage sag mitigation which works when the fault occurs in power distribution system. In this paper, the effect of the DVR location is investigated at the low and medium voltage of the distribution system with different loads. To verify the performance of the DVR in mitigating the …

Demonstrating The Potential For Covert Policing In The Community: Five Stakeholder Scenarios, Roba Abbas, Katina Michael, M G. Michael

Faculty of Informatics - Papers (Archive)

This paper presents the real possibility that commercial mobile tracking and monitoring solutions will become widely adopted for the practice of non traditional covert policing within a community setting, resulting in community members engaging in covert policing of family, friends, or acquaintances. This paper investigates five stakeholder relationships using scenarios to demonstrate the potential socio-ethical implications that tracking and monitoring people will have on society at large. The five stakeholder types explored in this paper include: (i) husband-wife (partner-partner), (ii) parent-child, (iii) employer-employee, (iv) friend-friend, and (v) stranger-stranger. Mobile technologies such as mobile camera phones, global positioning system data loggers, …

Toward A State Of Überveillance, M G. Michael, Katina Michael

Faculty of Informatics - Papers (Archive)

Überveillance is an emerging concept, and neither its application nor its power have yet fully arrived [38]. For some time, Roger Clarke's [12, p. 498] 1988 dataveillance concept has been prevalent: the “systematic use of personal data systems in the investigation or monitoring of the actions of one or more persons.”

Rfid- A Unique Radio Innovation For The 21st Century, Rajit Gadh, George Roussos, Katina Michael, George Q. Huang, B Shiv Prabhu, Peter Chu

Faculty of Informatics - Papers (Archive)

In 1948, the Proceedings of the Institute of Radio Engineers published Harry Stockman’s seminal work on “communication by means of reflected power,” which many consider as the first paper on RFID. The paper concluded by expressing the expectation that “considerable research and development work has to be done before the remaining basic problems in reflected-power communication are solved, and before the field of useful applications is explored.” It is only appropriate that after more than 60 years following the publication of this work by its progenitor, in this special issue the Proceedings of the IEEE review current developments towards the …

Electronic Properties Of Carbon Nanotubes With Distinct Bond Lengths, J E. Bunder, James M. Hill

Faculty of Informatics - Papers (Archive)

In band structure calculations commonly used to derive the electronic properties of carbon nanotubes it is generally assumed that all bond lengths are equal. However, hexagonal carbon lattices are often irregular and may contain as many as three distinct bond lengths. A regular $(n,m)$ carbon nanotube will be metallic if p=(n-m)/3 for integer p. Here we analytically derive the generalized condition for metallic irregular carbon nanotubes. This condition is particularly relevant to small radius nanotubes and nanotubes experiencing small applied strains.

Linking The Calkin-Wilf And Stern-Brocot Trees, Bruce Bates, Martin Bunder, Keith Tognetti

Faculty of Informatics - Papers (Archive)

Links between the Calkin-Wilif tree and the Stern-Brocot tree are discussed answering the questions: What is the jth vertex in the nth level of the Calkin-Wilf tree? A simple mechanism is described for converting the jth vertex in the nth level of the Calkin-Wilf tree into the jth entry in the nth level of the Stern-Brocot tree. We also provide a simple method for evaluating terms in the hyperbinary sequence thus answering a challenge raised in Quantum in September 1997. We also examine successors and predecessors in both trees.

Modelling Interaction Of Atoms And Ions With Graphene, James M. Hill, Yue Chan

Faculty of Informatics - Papers (Archive)

In this Letter, the authors inve´stigate the interaction of various atoms/ions with a graphene sheet and two parallel graphene sheets using the continuous approximation and the 6–12 Lennard-Jones potential. The authors assume that the carbon atoms are smeared across the surface of the graphene sheet so that the total interaction between the single atom/ion and the graphene sheet can be approximated by a surface integration over the graphene sheet. They determine the equilibrium position for the atom/ion on the surface of the graphene sheet and the minimum intermolecular spacing between two graphene sheets. This minimum spacing is by symmetry twice …

Periodic 2-Graphs Arising From Subshifts, David Pask, Iain Raeburn, Natasha A. Weaver

Faculty of Informatics - Papers (Archive)

Higher-rank graphs were introduced by Kumjian and Pask to provide models for higher-rank Cuntz– Krieger algebras. In a previous paper, we constructed 2 graphs whose path spaces are rank two subshifts of finite type, and showed that this construction yields aperiodic 2 graphs whose C algebras are simple and are not ordinary graph algebras. Here we show that the construction also gives a family of periodic 2 graphs which we call domino graphs. We investigate the combinatorial structure of domino graphs, finding interesting points of contact with the existing combinatorial literature, and prove a structure theorem for the C algebras …

The D-Completeness Of T->, R K. Meyer, M W. Bunder

Faculty of Informatics - Papers (Archive)

A Hilbert-style version of an implicational logic can be represented by a set of axiom schemes and modus ponens or by the corresponding axioms, modus ponens and substitution. Certain logics, for example the intuitionistic implicational logic, can also be represented by axioms and the rule of condensed detachment, which combines modus ponens with a minimal form of substitution. Such logics, for example intuitionistic implicational logic (see Hindley [3]), are said to be D-complete. For certain weaker logics, the version based on condensed detachment and axioms (the condensed version of the logic) is weaker than the original. In this paper we …

Refraction Of Nonlinear Beams By Localized Refrative Index Changes In Nematic Liquid Crystals, Gaetano Assanto, A A Minzoni, Noel F. Smyth, Annette L. Worthy

Faculty of Informatics - Papers (Archive)

The propagation of solitary waves in nematic liquid crystals in the presence of localised nonuniformities is studied. The nonuniformities can be caused by external electric fields, other light beams, or any other mechanism which results in a modified director orientation in a localised region of the liquid-crystal cell. The net effect is that the solitary wave undergoes refraction and trajectory bending. A general modulation theory for this refraction is developed, and particular cases of circular, elliptical and rectangular perturbations are considered. The results are found to be in excellent agreement with numerical solutions.

Exel's Crossed Product For Non-Unital C*-Algebras, Nathan D. Brownlowe, Iain F. Raeburn, Sean T. Vittadello

Faculty of Informatics - Papers (Archive)

We consider a family of dynamical systems (A, alpha, L) in which a is an endomorphism of a C*-algebra A and L is a transfer operator for a. We extend Exel's construction of a crossed product to cover non-unital algebras A, and show that the C*-algebra of a locally finite graph can be realised as one of these crossed products. When A is commutative, we find criteria for the simplicity of the crossed product, and analyse the ideal structure of the crossed product.