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2010

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Articles 6151 - 6180 of 8625

Full-Text Articles in Physical Sciences and Mathematics

Central Dark Matter Content Of Early-Type Galaxies: Scaling Relations And Connections With Star Formation Histories, N. R. Napolitano, Aaron J. Romanowsky, A. J. Tortora Jan 2010

Central Dark Matter Content Of Early-Type Galaxies: Scaling Relations And Connections With Star Formation Histories, N. R. Napolitano, Aaron J. Romanowsky, A. J. Tortora

Aaron J. Romanowsky

We examine correlations between masses, sizes and star formation histories for a large sample of low-redshift early-type galaxies, using a simple suite of dynamical and stellar population models. We confirm an anticorrelation between the size and stellar age and go on to survey for trends with the central content of dark matter (DM). An average relation between the central DM density and galaxy size of 〈ρDM〉∝R−2eff provides the first clear indication of cuspy DM haloes in these galaxies – akin to standard Λ cold dark matter haloes that have undergone adiabatic contraction. The DM density scales with galaxy mass as …

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A Hybrid Particle-Continuum Method For Hydrodynamics Of Complex Fluids, Alejandro Garcia, Aleksandar Donev, John B. Bell, Berni Alder Jan 2010

A Hybrid Particle-Continuum Method For Hydrodynamics Of Complex Fluids, Alejandro Garcia, Aleksandar Donev, John B. Bell, Berni Alder

Alejandro Garcia

A previously developed hybrid particle-continuum method [J. B. Bell, A. Garcia, and S. A. Williams, Multiscale Model. Simul., 6 (2008), pp. 1256–1280] is generalized to dense fluids and two- and three-dimensional flows. The scheme couples an explicit fluctuating compressible Navier–Stokes solver with the isotropic direct simulation Monte Carlo (DSMC) particle method [A. Donev, A. L. Garcia, and B. J. Alder, J. Stat. Mech. Theory Exp., 2009 (2009), article P11008]. To achieve bidirectional dynamic coupling between the particle (microscale) and continuum (macroscale) regions, the continuum solver provides state-based boundary conditions to the particle subdomain, while the particle solver provides flux-based boundary …

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Mining Frequent Generalized Patterns For Web Personalization In The Presence Of Taxonomies, Panagiotis Giannikopoulos, Iraklis Varlamis, Magdalini Eirinaki Jan 2010

Mining Frequent Generalized Patterns For Web Personalization In The Presence Of Taxonomies, Panagiotis Giannikopoulos, Iraklis Varlamis, Magdalini Eirinaki

Magdalini Eirinaki

The Web is a continuously evolving environment, since its content is updated on a regular basis. As a result, the traditional usage-based approach to generate recommendations that takes as input the navigation paths recorded on the Web page level, is not as effective. Moreover, most of the content available online is either explicitly or implicitly characterized by a set of categories organized in a taxonomy, allowing the page-level navigation patterns to be generalized to a higher, aggregate level. In this direction, the authors present the Frequent Generalized Pattern (FGP) algorithm. FGP takes as input the transaction data and a hierarchy …

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Bonding Over Bushfires: Social Networks In Action, Mark Freeman, Alison Freeman Jan 2010

Bonding Over Bushfires: Social Networks In Action, Mark Freeman, Alison Freeman

Faculty of Informatics - Papers (Archive)

A world-first nation-wide community website scheme was established in Australia in 2006 to enhance existing, and build new, social networks within geographic communities. By doing so, it sought to promote geographic community engagement. Initially, this paper presents an overview of the scheme since its inception and review the current geographic community groups participating in the scheme. To date the scheme has had limited success in attracting a critical mass of communities that value the promoted benefits of social networks in this format, with only 154 community websites across Australia. While it has not achieved the expected level of uptake, the …

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Social-Technical Issues Facing The Humancentric Rfid Implantee Sub-Culture Through The Eyes Of Amal Graafstra, Amal Graafstra, Katina Michael, M G. Michael Jan 2010

Social-Technical Issues Facing The Humancentric Rfid Implantee Sub-Culture Through The Eyes Of Amal Graafstra, Amal Graafstra, Katina Michael, M G. Michael

Faculty of Informatics - Papers (Archive)

Radio-frequency identification (RFID) tags and transponders have traditionally been used to identify domesticated animals so that they can be reunited with their owners in the event that they stray. In the late 1990s, industry started to investigate the benefits of using RFID to identifying non-living things throughout the supply chain toward new efficiencies in business operations. Not long after, people began to consider the possibilities of getting RFID tag or transponder implants for themselves. Mr Amal Graafstra of the United States is one of the first, and probably most well-known ‘do it yourselfer’ (DIY) implantees, who enjoys building customized projects …

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A New Approach To Harmonic Allocation For Mv Installations, Victor J. Gosbell, Robert A. Barr Jan 2010

A New Approach To Harmonic Allocation For Mv Installations, Victor J. Gosbell, Robert A. Barr

Faculty of Informatics - Papers (Archive)

Distributors need to allocate a maximum allowed level of harmonic current to MV customers to keep voltage distortion acceptable. The paper describes a new approach, based on the concept of voltage droop, requiring much less calculation and data than required by the present approach based on an IEC technical report. The discrepancy between the new method and the present is studied by comparing some carefully selected scenarios. It is shown that the proposed method gives results within 20% of the standards-based approach which makes it a very attractive alternative for harmonic allocation.

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The Semenov Formulation Of The Biological Self-Heating Process In Compost Piles, Thiansiri Luangwilai, Harvinder Sidhu, M I. Nelson, X D. Chen Jan 2010

The Semenov Formulation Of The Biological Self-Heating Process In Compost Piles, Thiansiri Luangwilai, Harvinder Sidhu, M I. Nelson, X D. Chen

Faculty of Informatics - Papers (Archive)

We formulate and investigate a uniformly distributed mathematical model (based upon Semenov's theory for thermal explosions) for the thermal response of cellulosic materials in compost piles. The model consists of a mass balance equation for oxygen, a heat balance equation, and incorporates the heat release due to biological activity within the pile. Biological heat generation is known to be present in most industrial processes handling large volumes of bulk organic materials. We utilise singularity theory to investigate the generic properties of the model, as well as to determine the locus of different singularities, namely the cusp, isola and double limit …

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Tutorials On Agent-Based Modelling With Netlogo And Network Analysis With Pajek, Matthew J. Berryman, Simon D. Angus Jan 2010

Tutorials On Agent-Based Modelling With Netlogo And Network Analysis With Pajek, Matthew J. Berryman, Simon D. Angus

SMART Infrastructure Facility - Papers

Complex adaptive systems typically contain multiple, heterogeneous agents, with non-trivial interactions. They tend to produce emergent (larger-scale) phenomena. Agent-based modelling allows one to read- ily capture the behaviour of a group of heterogeneous agents (such as people, animals, et cetera), with diverse behaviour and important in- teractions, so it is a natural t to modelling complex systems. Many complex systems (and agent-based models thereof) can be thought of as containing networks, either explicitly or implicitly. Therefore for complex systems research it is important to have a good understand- ing of network analysis techniques. This chapter is aimed at beginners to …

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Spatio-Temporal Access Methods: Part 2 (2003 - 2010), Long-Van Nguyen-Dinh, Walid G. Aref, Mohamed Mokbel Jan 2010

Spatio-Temporal Access Methods: Part 2 (2003 - 2010), Long-Van Nguyen-Dinh, Walid G. Aref, Mohamed Mokbel

Cyber Center Publications

In spatio-temporal applications, moving objects detect their locations via location-aware devices and update their locations continuously to the server. With the ubiquity and massive numbers of moving objects, many spatio-temporal access methods are developed to process user queries efficiently. Spatio- temporal access methods are classified into four categories: (1) Indexing the past data, (2) Indexing the current data, (3) Indexing the future data, and (4) Indexing data at all points of time. This short survey is Part 2 of our previous work [28]. In Part 2, we give an overview and classification of spatio-temporal access methods that are published between …

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Privometer: Privacy Protection In Social Networks, Nilothpal Talukder, Mourad Ouzzani, Ahmed Elmagarmid, Hazem Elmeleegy Jan 2010

Privometer: Privacy Protection In Social Networks, Nilothpal Talukder, Mourad Ouzzani, Ahmed Elmagarmid, Hazem Elmeleegy

Cyber Center Publications

The increasing popularity of social networks, such as Facebook and Orkut, has raised several privacy concerns. Traditional ways of safeguarding privacy of personal information by hiding sensitive attributes are no longer adequate. Research shows that probabilistic classification techniques can effectively infer such private information. The disclosed sensitive information of friends, group affiliations and even participation in activities, such as tagging and commenting, are considered background knowledge in this process. In this paper, we present a privacy protection tool, called Privometer, that measures the amount of sensitive information leakage in a user profile and suggests selfsanitization actions to regulate the amount …

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Berberine-Inf55 (5-Nitro-2-Phenylindole) Hybrid Antimicrobials: Effects Of Varying The Relative Orientation Of The Berberine And Inf55 Components, Danuta Tomkiewicz, Gabriele Casadei, Jonah Larkins-Ford, Terence I. Moy, James A. Garner, John B. Bremner, Frederik M. Ausubel, Kim Lewis, Michael J. Kelso Jan 2010

Berberine-Inf55 (5-Nitro-2-Phenylindole) Hybrid Antimicrobials: Effects Of Varying The Relative Orientation Of The Berberine And Inf55 Components, Danuta Tomkiewicz, Gabriele Casadei, Jonah Larkins-Ford, Terence I. Moy, James A. Garner, John B. Bremner, Frederik M. Ausubel, Kim Lewis, Michael J. Kelso

Faculty of Science - Papers (Archive)

Hybrid antimicrobials containing an antibacterial linked to a multidrug resistance (MDR) pump inhibitor make up a promising new class of agents for countering efflux-mediated bacterial drug resistance. This study explores the effects of varying the relative orientation of the antibacterial and efflux pump inhibitor components in three isomeric hybrids (SS14, SS14-M, and SS14-P) which link the antibacterial alkaloid and known substrate for the NorA MDR pump berberine to different positions on INF55 (5-nitro-2-phenylindole), an inhibitor of NorA. The MICs for all three hybrids against wild-type, NorA-knockout, and NorA-overexpressing Staphylococcus aureus cells were found to be similar (9.4 to 40.2 mu …

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The Effect Of Fuel Age On The Spread Of Fire In Sclerophyll Forest In The Sydney Region Of Australia., Ross A. Bradstock, Owen F. Price Jan 2010

The Effect Of Fuel Age On The Spread Of Fire In Sclerophyll Forest In The Sydney Region Of Australia., Ross A. Bradstock, Owen F. Price

Faculty of Science - Papers (Archive)

We investigated the effect of fuel age on the truncation of spread of unplanned fires using a set of 1473 patches in the Sydney region of Australia. Twenty-two percent of patches derived from prescribed fire experienced a subsequent unplanned fire within 5 years, compared with 42% of patches derived from unplanned fires. Among those encounters, the subsequent unplanned fire stopped at the leading edge of 18% of prescribed patches and 11% of unplanned patches. In comparison, the subsequent fire stopped somewhere in the patch for 44% of both prescribed and unplanned fires. Overall, there was a 10% chance that a …

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Reaction Of The C2h Radical With 1-Butyne (C4h6): Low Temperature Kinetics And Isomer-Specific Product Detection, Satchin Soorkia, Adam J. Trevitt, Talitha M. Selby, David L. Osborn, Craig A. Taatjes, Kevin R. Wilson, Stephen R. Leone Jan 2010

Reaction Of The C2h Radical With 1-Butyne (C4h6): Low Temperature Kinetics And Isomer-Specific Product Detection, Satchin Soorkia, Adam J. Trevitt, Talitha M. Selby, David L. Osborn, Craig A. Taatjes, Kevin R. Wilson, Stephen R. Leone

Faculty of Science - Papers (Archive)

No abstract provided.

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Nanometer-Scale Distance Measurements In Proteins Using Gd3+ Spin Labeling, Alexey Potapov, Hiromasa Yagi, Thomas Huber, Slobodan Jergic, Nicholas E. Dixon, Gottfried Otting, Daniella Goldfarb Jan 2010

Nanometer-Scale Distance Measurements In Proteins Using Gd3+ Spin Labeling, Alexey Potapov, Hiromasa Yagi, Thomas Huber, Slobodan Jergic, Nicholas E. Dixon, Gottfried Otting, Daniella Goldfarb

Faculty of Science - Papers (Archive)

Methods for measuring nanometer-scale distances between specific sites in proteins are essential for analysis of their structure and function. In this work we introduce Gd3+ spin labeling for nanometer-range distance measurements in proteins by high-field pulse electron paramagnetic resonance (EPR). To evaluate the performance of such measurements, we carried out four-pulse double-electron electron resonance (DEER) measurements on two proteins, p75ICD and τC14, labeled at strategically selected sites with either two nitroxides or two Gd3+ spin labels. In analogy to conventional site-directed spin labeling using nitroxides, Gd3+ tags that are derivatives of dipicolinic acid were covalently attached to cysteine thiol groups. …

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Synthesis Of Reaction-Ready 6,6 '-Biindole And 6,6 '-Biisatin Via Palladium(Ii)-Catalysed Intramolecular C-H Functionalisation, Allan B. Gamble, Paul A. Keller Jan 2010

Synthesis Of Reaction-Ready 6,6 '-Biindole And 6,6 '-Biisatin Via Palladium(Ii)-Catalysed Intramolecular C-H Functionalisation, Allan B. Gamble, Paul A. Keller

Faculty of Science - Papers (Archive)

The first synthesis of a 6,6'-biindole and 6,6'-biisatin scaffold is reported with the penultimate step being the formation of the di-heterocyclic ring by Pd(II)-catalysed intramolecular C-H functionalisation and Sandmeyer cyclisation, respectively.

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Female Choice For Males With Greater Fertilization Success In The Swedish Moor Frog, Rana Arvalis, Craig D. Sherman, Jorgen Sagvik, Mats M. Olsson Jan 2010

Female Choice For Males With Greater Fertilization Success In The Swedish Moor Frog, Rana Arvalis, Craig D. Sherman, Jorgen Sagvik, Mats M. Olsson

Faculty of Science - Papers (Archive)

Background: Studies of mate choice in anuran amphibians have shown female preference for a wide range of male traits despite females gaining no direct resources from males (i.e. non-resource based mating system). Nevertheless, theoretical and empirical studies have shown that females may still gain indirect genetic benefits from choosing males of higher genetic quality and thereby increase their reproductive success. Methodology/Principal Findings: We investigated two components of sexual selection in the Moor frog (Rana arvalis), precopulatory female choice between two males of different size ('large' vs. 'small'), and their fertilization success in sperm competition and in isolation. Females' showed no …

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Distribution Of Class 1 Integrons With Is26-Mediated Deletions In Their 3'-Conserved Segments In Escherichia Coli Of Human And Animal Origin., Fay E. Dawes, Alexander Kuzevski, Karl A Bettelheim, Michael A Hornitzky, Steven P Djordjevic, Mark J. Walker Jan 2010

Distribution Of Class 1 Integrons With Is26-Mediated Deletions In Their 3'-Conserved Segments In Escherichia Coli Of Human And Animal Origin., Fay E. Dawes, Alexander Kuzevski, Karl A Bettelheim, Michael A Hornitzky, Steven P Djordjevic, Mark J. Walker

Faculty of Science - Papers (Archive)

Class 1 integrons play a role in the emergence of multi-resistant bacteria by facilitating the recruitment of gene cassettes encoding antibiotic resistance genes. 512 E. coli strains sourced from humans (n = 202), animals (n = 304) and the environment (n = 6) were screened for the presence of the intI1 gene. In 31/79 integron positive E. coli strains, the gene cassette regions could not be PCR amplified using standard primers. DNA sequence analysis of 6 serologically diverse strains revealed atypical integrons harboured the dfrA5 cassette gene and only 24 bp of the integron 3'-conserved segment (CS) remained, due to …

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Development Of A Regional Habitat Classification Scheme For The Amirante Islands, Seychelles, Sarah Hamylton, Tom Spencer, Annelise Hagan Jan 2010

Development Of A Regional Habitat Classification Scheme For The Amirante Islands, Seychelles, Sarah Hamylton, Tom Spencer, Annelise Hagan

Faculty of Science - Papers (Archive)

A collaborative expedition between Khaled bin Sultan Living Oceans Foundation, Cambridge Coastal Research Unit and Seychelles Centre for Marine Research and Technology – Marine Parks Authority (SCMRT-MPA) was conducted to the southern Seychelles, western Indian Ocean, in January 2005. This resulted in a series of habitat maps of the reefs and reef islands of the Amirantes Archipelago, derived from remotely-sensed Compact Airborne Spectrographic Imager (CASI) data. The procedures used in map development, image processing techniques and field survey methods are outlined. Habitat classification, and regional-scale comparisons of relative habitat composition are described. The study demonstrates the use of remote sensing …

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Semisynthesis And Acetylcholinesterase Inhibitory Activity Of Stemofoline Alkaloids And Analogues, Kwankamol Sastraruji, Thanapat Sastraruji, Stephen G. Pyne, Alison T. Ung, Araya Jatisatienr, Wilford Lie Jan 2010

Semisynthesis And Acetylcholinesterase Inhibitory Activity Of Stemofoline Alkaloids And Analogues, Kwankamol Sastraruji, Thanapat Sastraruji, Stephen G. Pyne, Alison T. Ung, Araya Jatisatienr, Wilford Lie

Faculty of Science - Papers (Archive)

Semisynthesis of the known Stemona alkaloids oxystemofoline (7) and methoxystemofoline (8) has been achieved starting from (11Z)-1′,2′-didehydrostemofoline (6), which confirmed their structures and absolute configurations. The synthesis of (1′R)-hydroxystemofoline (9) helped establish this compound as a natural product from Stemona aphylla. (1′S)- Hydroxystemofoline (10) and a number of related analogues were also prepared. In a TLC bioautographic assay, 9 was found to be the most active acetylcholinesterase inhibitor, but it was not as active as galanthamine.

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Autonomous Greenhouse Gas Measurement System For Analysis Of Gas Migration On Landfill Sites, Stephen Beirne, Breda M. Kierman, Cormac Fay, Colum Foley, Brian Corcoran, Alan F. Smeaton, Dermot Diamond Jan 2010

Autonomous Greenhouse Gas Measurement System For Analysis Of Gas Migration On Landfill Sites, Stephen Beirne, Breda M. Kierman, Cormac Fay, Colum Foley, Brian Corcoran, Alan F. Smeaton, Dermot Diamond

Faculty of Science - Papers (Archive)

This paper describes the design, development and validation of an autonomous gas sensing platform prototype for monitoring of the greenhouse gases, methane (CH4) and carbon dioxide (CO2). The deployment undertaken for validation of the developed prototype monitored landfill gas migration to perimeter borehole wells on a landfill site. Target gas concentrations were captured via infrared gas sensors tuned for each target gas and data reported to an offsite data collection point at 12 hour intervals. This bespoke platform and the accompanying data recording and interface software provide a flexible alternative to the presently employed labor intensive, …

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Microevolution Of Group A Streptococci In Vivo: Capturing Regulatory Networks Engaged In Sociomicrobiology, Niche Adaptation, And Hypervirulence, Ramy K. Aziz, Rita G. Kansal, Bruce A. Aronow, William L. Taylor, Sarah L. Rowe, Michael Kubal, Gursharan S Chhatwal, Mark J. Walker, Malak Kotb Jan 2010

Microevolution Of Group A Streptococci In Vivo: Capturing Regulatory Networks Engaged In Sociomicrobiology, Niche Adaptation, And Hypervirulence, Ramy K. Aziz, Rita G. Kansal, Bruce A. Aronow, William L. Taylor, Sarah L. Rowe, Michael Kubal, Gursharan S Chhatwal, Mark J. Walker, Malak Kotb

Faculty of Science - Papers (Archive)

The onset of infection and the switch from primary to secondary niches are dramatic environmental changes that not only alter bacterial transcriptional programs, but also perturb their sociomicrobiology, often driving minor subpopulations with mutant phenotypes to prevail in specific niches. Having previously reported that M1T1 Streptococcus pyogenes become hypervirulent in mice due to selection of mutants in the covRS regulatory genes, we set out to dissect the impact of these mutations in vitro and in vivo from the impact of other adaptive events. Using a murine subcutaneous chamber model to sample the bacteria prior to selection or expansion of mutants, …

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Low Complexity Interference Aware Distributed Resource Allocation For Multi-Cell Ofdma Cooperative Relay Networks, Nidhal Odeh, Mehran Abolhasan, Farzad Safaei Jan 2010

Low Complexity Interference Aware Distributed Resource Allocation For Multi-Cell Ofdma Cooperative Relay Networks, Nidhal Odeh, Mehran Abolhasan, Farzad Safaei

Faculty of Informatics - Papers (Archive)

In this paper we focus on the subcarrier allocation for the uplink OFDMA based cooperative relay networks. Multiple cells were considered, each composed of a single base station (destination), multiple amplify and forward (AF) relay stations and multiple subscriber stations (sources). The effects of inter-cell interference (ICI) have been considered to optimize the subcarrier allocation with low complexity. The optimization problem aims to maximize the sum rate of all sources and at the same time maintain the fairness among them. Full channel state information (CSI) is assumed to be available at the base station. In the proposed algorithm the subcarrier …

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New Classes Of Orthogonal Designs Constructed From Complementary Sequences With Given Spread, Ilias Kotsireas, Christos Koukouvinos, Jennifer Seberry, D. Simos Jan 2010

New Classes Of Orthogonal Designs Constructed From Complementary Sequences With Given Spread, Ilias Kotsireas, Christos Koukouvinos, Jennifer Seberry, D. Simos

Faculty of Informatics - Papers (Archive)

In this paper we present, infinite families of new orthgonal designs, based on some weighing matrices of order 2n, weight 2n - k and spread o, constructed from two circlante and directed sequences.

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A Generalised Minimum Variance Controller For Time-Varying Mimo Linear Systems With Multiple Delays, Zheng Li, Christian Schmid Jan 2010

A Generalised Minimum Variance Controller For Time-Varying Mimo Linear Systems With Multiple Delays, Zheng Li, Christian Schmid

Faculty of Informatics - Papers (Archive)

In this paper we study optimal control of time-varying multi-input multi-output stochastic systems and develop a generalised minimum variance controller. The system to be controlled is described using a multi-input multi-output time-varying autoregressive moving average model that has multiple delays between the output and input. The controller minimises the sum of output tracking error variances and squared current control variables.

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A Feasibility Of Incorporating Pdas Into Problem-Based Learning Approach To Medical Education: An Overview, Rattiporn Luanrattana, Khin Than Win, John Fulcher Jan 2010

A Feasibility Of Incorporating Pdas Into Problem-Based Learning Approach To Medical Education: An Overview, Rattiporn Luanrattana, Khin Than Win, John Fulcher

Faculty of Informatics - Papers (Archive)

This paper explores the feasibility of incorporating personal digital assistants (PDAs) into problem-based learning (PBL) approach in medical education. Method: Database searched was conducted by using relevant keywords. From 1,317 relevant journal articles, 489 articles (37%) are related to the use of PDAs in medical settings, medical education and aspects regarding PDA use in both areas. The appropriate materials were input into NVivo 7 for analysis. Results: Five PDA functionalities (clinical-log, reference, personal information management, communication and special functions) and 8 factors (data security and information privacy, interoperability, scalability and network connectivity, education and training, technology comfort, electromagnetic interference, social …

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The Height Variance Range For One Frequency Fringe Pattern Profilometry, Yi Ding, Jiangtao Xi, Yanguang Yu, Joe F. Chicharo, Wenqing Cheng Jan 2010

The Height Variance Range For One Frequency Fringe Pattern Profilometry, Yi Ding, Jiangtao Xi, Yanguang Yu, Joe F. Chicharo, Wenqing Cheng

Faculty of Informatics - Papers (Archive)

The upper limit on the deepest step of the surface shape that can be accurately determined is an important performance measure associated with the fringe projection profilometry. This metric is evaluated as the variance of height between two adjacent pixels on a fringe patterns reflected from the object surface. This paper presents novel results on this metric based on the Nyquist sampling theorem originally developed in the area of communication theory. Compared to existing results, we indicate that the fringe width and digital image resolution also affect the height variance range significantly. This new result could be used to increase …

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An Abuse-Free Fair Contract-Signing Protocol Based On The Rsa Signature, Guilin Wang Jan 2010

An Abuse-Free Fair Contract-Signing Protocol Based On The Rsa Signature, Guilin Wang

Faculty of Informatics - Papers (Archive)

A fair contract-signing protocol allows two potentially mistrusted parities to exchange their commitments (i.e., digital signatures) to an agreed contract over the Internet in a fair way, so that either each of them obtains the other's signature, or neither party does. Based on the RSA signature scheme, a new digital contract-signing protocol is proposed in this paper. Like the existing RSA-based solutions for the same problem, our protocol is not only fair, but also optimistic, since the trusted third party is involved only in the situations where one party is cheating or the communication channel is interrupted. Furthermore, the proposed …

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Functionalities Of Free And Open Electronic Health Record Systems, Alejandro Enrique Flores Zuniga, Khin Than Win, Willy Susilo Jan 2010

Functionalities Of Free And Open Electronic Health Record Systems, Alejandro Enrique Flores Zuniga, Khin Than Win, Willy Susilo

Faculty of Informatics - Papers (Archive)

Objectives: The aim of this study was to examine open-source electronic health record (EHR) software to determine their level of functionalities according to the International Organization for Standardization (ISO) standards. Methods: ISO standards were used as a guideline to determine and describe the reference architecture and functionalities of a standard electronic health record system as well the environmental context for which the software has been built. Twelve open-source EHR systems were selected and evaluated according to two-dimensional criteria based on ISO/TS 18308:2004 functional requirements and ISO/TR 20514:2005 context of the EHR system. Results: Open EHR software programs mostly fulfill structural, …

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A Review Of Recent Investigations With Reference To Iec/Tr 61000-3-13 On Voltage Unbalance Emission Allocation, Prabodha Paranavithana, Upuli Jayatunga, Sarath Perera, Philip Ciufo Jan 2010

A Review Of Recent Investigations With Reference To Iec/Tr 61000-3-13 On Voltage Unbalance Emission Allocation, Prabodha Paranavithana, Upuli Jayatunga, Sarath Perera, Philip Ciufo

Faculty of Informatics - Papers (Archive)

The Technical Report IEC/TR 61000-3-13:2008 provides guiding principles for coordinating voltage unbalance between various voltage levels of a power system through the allocation of emission limits to installations. This report is based on widely accepted concepts and principles in relation to voltage unbalance. With regard to some of the key ideas used in this report, investigations have been carried out which have enabled the development of deeper insights making the voltage unbalance allocation process more comprehensive. The key aspects which have been considered in detail include: voltage unbalance which arises as a result of lines and voltage unbalance propagation in …

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Introducing Power System Voltage Droop As A New Concept For Harmonic Current Allocation, Robert A. Barr, V. J. Gosbell Jan 2010

Introducing Power System Voltage Droop As A New Concept For Harmonic Current Allocation, Robert A. Barr, V. J. Gosbell

Faculty of Informatics - Papers (Archive)

“Voltage Droop” is a new concept that has been developed primarily for use in the harmonic current allocation process. Voltage droop offers the opportunity to both vastly simplify the procedures required by the present IEC 61000.3.6 [1] guidelines for Stage 2 allocation and provide a solid theoretical base to this work. The voltage droop concept has also been found to provide a usefull theoretical basis for the harmonic standard IEEE 519[2]. While this paper develops the voltage droop concept using diagrams and words, the companion paper “Harmonic Allocation Following IEC Guidelines Using the Voltage Droop Concept”[3] contains a full critical …

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