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Context-Aware Query Recommendations, Alexandros NTOULAS, Heasoo HWANG, Lise GETOOR, Stelios PAPARIZOS, Hady Wirawan LAUW 2010 Singapore Management University

Context-Aware Query Recommendations, Alexandros Ntoulas, Heasoo Hwang, Lise Getoor, Stelios Paparizos, Hady Wirawan Lauw

Research Collection School Of Information Systems

Described is a search-related technology in which context information regarding a user's prior search actions is used in making query recommendations for a current user action, such as a query or click. To determine whether each set or subset of context information is relevant to the user action, data obtained from a query log is evaluated. More particularly, a query transition (query-query) graph and a query click (query-URL) graph are extracted from the query log; vectors are computed for the current action and each context/sub-context and evaluated against vectors in the graphs to determine current action-to-context similarity. Also ...


A New Framework For Rfid Privacy, Robert H. DENG, Yingjiu LI, Moti YUNG, Yunlei ZHAO 2010 Singapore Management University

A New Framework For Rfid Privacy, Robert H. Deng, Yingjiu Li, Moti Yung, Yunlei Zhao

Research Collection School Of Information Systems

Formal RFID security and privacy frameworks are fundamental to the design and analysis of robust RFID systems. In this paper, we develop a new definitional framework for RFID privacy in a rigorous and precise manner. Our framework is based on a zero-knowledge (ZK) formulation [8,6] and incorporates the notions of adaptive completeness and mutual authentication. We provide meticulous justification of the new framework and contrast it with existing ones in the literature. In particular, we prove that our framework is strictly stronger than the ind-privacy model of [18], which answers an open question posed in [18] for developing stronger ...


Scenario-Based And Value-Based Specification Mining: Better Together, David LO, Shahar Maoz 2010 Singapore Management University

Scenario-Based And Value-Based Specification Mining: Better Together, David Lo, Shahar Maoz

Research Collection School Of Information Systems

Specification mining takes execution traces as input and extracts likely program invariants, which can be used for comprehension, verification, and evolution related tasks. In this work we integrate scenario-based specification mining, which uses data-mining algorithms to suggest ordering constraints in the form of live sequence charts, an inter-object, visual, modal, scenario-based specification language, with mining of value-based invariants, which detects likely invariants holding at specific program points. The key to the integration is a technique we call scenario-based slicing, running on top of the mining algorithms to distinguish the scenario-specific invariants from the general ones. The resulting suggested specifications are ...


Shortest Path Computation On Air Indexes, Georgios KELLARIS, Kyriakos MOURATIDIS 2010 Singapore Management University

Shortest Path Computation On Air Indexes, Georgios Kellaris, Kyriakos Mouratidis

Research Collection School Of Information Systems

Shortest path computation is one of the most common queries in location-based services that involve transportation net- works. Motivated by scalability challenges faced in the mo- bile network industry, we propose adopting the wireless broad- cast model for such location-dependent applications. In this model the data are continuously transmitted on the air, while clients listen to the broadcast and process their queries locally. Although spatial problems have been considered in this environment, there exists no study on shortest path queries in road networks. We develop the rst framework to compute shortest paths on the air, and demonstrate the practicality and ...


Iphone 3gs Forensics: Logical Analysis Using Apple Itunes Backup Utility, Mona Bader, Ibrahim Baggili 2010 Zayed University

Iphone 3gs Forensics: Logical Analysis Using Apple Itunes Backup Utility, Mona Bader, Ibrahim Baggili

Electrical & Computer Engineering and Computer Science Faculty Publications

The iPhone mobile is used worldwide due to its enhanced computing capabilities, increased storage capacity as well as its attractive touch interface. These characteristics made the iPhone a popular smart phone device. The increased use of the iPhone lead it to become a potential source of digital evidence in criminal investigations. Therefore, iPhone forensics turned into an essential practice for forensic and security practitioners today. This research aimed at investigating and examining the logical backup acquisition of the iPhone 3GS mobile device using the Apple iTunes backup utility. It was found that significant data of forensic value such as e-mail ...


Creative Exercises In General Chemistry: A Student-Centered Assessment, Scott E. Lewis, Janet L. Shaw, Kathryn A. Freeman 2010 Kennesaw State University

Creative Exercises In General Chemistry: A Student-Centered Assessment, Scott E. Lewis, Janet L. Shaw, Kathryn A. Freeman

Faculty Publications

Creative exercises (CEs) are a form of assessment in which students are given a prompt and asked to write down as many distinct, correct, and relevant facts about the prompt as they can. Students receive credit for each fact that they include that is related to the prompt and distinct from the other facts they list. With CEs, students have an opportunity to demonstrate their knowledge and the opportunity to select the information that they believe is related to the prompt. In addition, CEs encourage students to connect concepts because any relevant information presented can assist them in completing the ...


Investment In Cellulosic Biofuel Refineries: Do Renewable Identification Numbers Matter?, Ruiqing Miao, David A. Hennessy, Bruce A. Babcock 2010 Iowa State University

Investment In Cellulosic Biofuel Refineries: Do Renewable Identification Numbers Matter?, Ruiqing Miao, David A. Hennessy, Bruce A. Babcock

CARD Working Papers

A floor and trade policy in Renewable Identification Numbers (RINs) is the market mechanism by which U.S. biofuel consumption mandates are met. A conceptual model is developed to study the impact of RINs on stimulating investment in cellulosic biofuel refineries. In a two-period framework, we compare the first-period investment level (FIL) in three scenarios: (1) laissez-faire, (2) RINs under a nonwaivable mandate (NWM) policy, and (3) RINs under a waivable mandate (WM) policy. Results show that when firm-level marginal costs are constants, then RINs under WM policy do not stimulate FIL but they do increase the expected profit of ...


Animal Disease And The Industrialization Of Agriculture, David A. Hennessy, Tong Wang 2010 Iowa State University

Animal Disease And The Industrialization Of Agriculture, David A. Hennessy, Tong Wang

CARD Working Papers

The industrialization of animal agriculture has fundamentally transformed animal health markets while animal health innovations have promoted this industrialization. The subtlety of these interactions shows how little we know about agricultural industrialization. To illustrate, we consider three stylized features of industrialized animal agriculture. These are the closing off of production activities from external effects, emphasis on control, and use of biosecurity measures. We find that animal disease externalities should lead to higher stocking on any given farm, and also to deficient entry into animal production. Eradicating the disease in a region increases both the stocking rate per farm and the ...


Modeling The Effects Of Pasture Expansion On Emissions From Land-Use Change, Jerome R. F. Dumortier, Dermot J. Hayes, Miguel Carriquiry, Fengxia Dong, Xiaodong Du, Amani E. Elobeid, Jacinto F. Fabiosa, Kranti Mulik 2010 Iowa State University

Modeling The Effects Of Pasture Expansion On Emissions From Land-Use Change, Jerome R. F. Dumortier, Dermot J. Hayes, Miguel Carriquiry, Fengxia Dong, Xiaodong Du, Amani E. Elobeid, Jacinto F. Fabiosa, Kranti Mulik

CARD Working Papers

We present a global agricultural greenhouse gas model that assesses emissions from land-use change. In addition to evaluating shifts in and out of crop production, we develop a pasture model to assess extensification and intensification of global livestock production based on herd size and stocking rate. We apply the model to a scenario that introduces a tax on methane emissions from cattle in the United States. The resulting expansion of pasture in the rest of the world leads to substantially higher emissions than without the tax. The yearly average emissions from the tax are 260 metric tons of CO2-equivalent.


Symmetric Criticality In Classical Field Theory, Charles G. Torre, Ian M. Anderson 2010 Department of Physics, Utah State University

Symmetric Criticality In Classical Field Theory, Charles G. Torre, Ian M. Anderson

All Physics Faculty Publications

This is a brief overview of work done by Ian Anderson, Mark Fels, and myself on symmetry reduction of Lagrangians and Euler-Lagrange equations, a subject closely related to Palais’ Principle of Symmetric Criticality. After providing a little history, I describe necessary and sufficient conditions on a group action such that reduction of a group-invariant Lagrangian by the symmetry group yields the correct symmetry-reduced Euler-Lagrange equations.


Tracing Multiple Scattering Patterns In Absolute (E, 2e) Cross Sections For H2 And He Over A 4Π Solid Angle, Xueguang Ren, Arne Senftleben, Thomas Pflüger, Alexander Dorn, James Colgan, Michael S. Pindzola, Ola A. Al-Hagan, Don H. Madison, Igor Bray, Dmitry V. Fursa, Joachim Hermann Ullrich 2010 Missouri University of Science and Technology

Tracing Multiple Scattering Patterns In Absolute (E, 2e) Cross Sections For H2 And He Over A 4Π Solid Angle, Xueguang Ren, Arne Senftleben, Thomas Pflüger, Alexander Dorn, James Colgan, Michael S. Pindzola, Ola A. Al-Hagan, Don H. Madison, Igor Bray, Dmitry V. Fursa, Joachim Hermann Ullrich

Physics Faculty Research & Creative Works

Absolutely normalized (e,2e) measurements for H2 and He covering the full solid angle of one ejected electron are presented for 16 eV sum energy of both final state continuum electrons. For both targets rich cross-section structures in addition to the binary and recoil lobes are identified and studied as a function of the fixed electron's emission angle and the energy sharing among both electrons. For H2 their behavior is consistent with multiple scattering of the projectile as discussed before. For He the binary and recoil lobes are significantly larger than for H2 and partly cover ...


Relation Between Transmission And Energy Stored In Random Media With Gain, Ben Payne, Jonathan Andreasen, Hui Cao, Alexey Yamilov 2010 Missouri University of Science and Technology

Relation Between Transmission And Energy Stored In Random Media With Gain, Ben Payne, Jonathan Andreasen, Hui Cao, Alexey Yamilov

Physics Faculty Research & Creative Works

In this work, we investigate a possibility of using the ratio between optical transmission, T, and energy stored inside the system, E, as a quantitative measure of the enhanced mesoscopic corrections to diffusive transport of light through a random medium with gain. We obtain an expression for T/E as a function of amplification strength in the diffusive approximation and show that it does not a have tendency to diverge when the threshold for random lasing is approached, as both T and E do. Furthermore, we find that a change in T/E signifies a change in the electric field ...


P2pdoctagger: Content Management Through Automated P2p Collaborative Tagging, Hock Hee ANG, Vivekanand GOPALKRISHNAN, Wee Keong NG, Steven C. H. HOI 2010 Nanyang Technological University

P2pdoctagger: Content Management Through Automated P2p Collaborative Tagging, Hock Hee Ang, Vivekanand Gopalkrishnan, Wee Keong Ng, Steven C. H. Hoi

Research Collection School Of Information Systems

As the amount of user generated content grows, personal information management has become a challenging problem. Several information management approaches, such as desktop search, document organization and (collaborative) document tagging have been proposed to address this, however they are either inappropriate or inefficient. Automated collaborative document tagging approaches mitigate the problems of manual tagging, but they are usually based on centralized settings which are plagued by problems such as scalability, privacy, etc. To resolve these issues, we present P2PDocTagger, an automated and distributed document tagging system based on classification in P2P networks. P2P-DocTagger minimizes the efforts of individual peers and ...


Investigating Ultrasonic Positioning On Mobile Phones, Viacheslav Filonenko, Charlie Cullen, James Carswell 2010 Dublin Institute of Technology

Investigating Ultrasonic Positioning On Mobile Phones, Viacheslav Filonenko, Charlie Cullen, James Carswell

Conference papers

In this paper we evaluate the innate ability of mobile phone speakers to produce ultrasound and the possible uses of this ability for accurate indoor positioning. The frequencies in question are a range between 20 and 22 KHz, which is high enough to be inaudible but low enough to be generated by standard sound hardware. A range of tones is generated at different volume settings on several popular modern mobile phones with the aim of finding points of failure. Our results indicate that it is possible to generate the given range of frequencies without significant distortions, provided the signal volume ...


A Risk Assessment Based Model For Assessing The Environmental Sustainability Of Tourism And Recreation Areas, Peter Roe 2010 Dublin Institute of Technology

A Risk Assessment Based Model For Assessing The Environmental Sustainability Of Tourism And Recreation Areas, Peter Roe

Doctoral

Assessing the environmental quality of tourism and recreation areas is considered fundamental to the sustainable management of these resources. However, existing methodologies for such assessments rely on sets of environmental data that are often poorly linked and difficult to interpret and integrate in a holistic manner. Risk assessment is a concept that has developed to the point where it has the potential to address current limitations in environmental assessment methodologies. This thesis presents a new model for the application of risk assessment to the management and assessment of environmental sustainability in the tourism and recreation sector. This model was applied ...


Sol-Gel Synthesis And Characterisation Of Novel Metal Oxide Nanomaterials For Photocatalytic Applications, Nicholas T. Nolan 2010 Dublin Institute of Technology

Sol-Gel Synthesis And Characterisation Of Novel Metal Oxide Nanomaterials For Photocatalytic Applications, Nicholas T. Nolan

Doctoral

This thesis presents a study of the effect of chemical modifiers and dopants on both the anatase to rutile transformation and also the photocatalytic efficiency of semiconductor nanomaterials. The main focus of the work is based on the crystallisation and phase transformation of the widely investigated semiconductor metal oxide, titanium dioxide (TiO2) Of the three polymorphs associated with titanium dioxide, anatase is widely regarded as the most effective photocatalyst. Typically anatase will transform to rutile in the temperature range 600 – 700 °C however, modification of a titanium precursor with a chelating agent can result in extended transformation temperature. The effect ...


An Explicit Super‐Time‐Stepping Scheme For Non‐Symmetric Parabolic Problems, Stephen O'Sullivan, Katharine Gurski 2010 Dublin Institute of Technology

An Explicit Super‐Time‐Stepping Scheme For Non‐Symmetric Parabolic Problems, Stephen O'Sullivan, Katharine Gurski

Conference papers

No abstract provided.


Relativistic Particle Acceleration In Tangled Magnetic Fields, Stephen O'Sullivan, Brian Reville, Andrew Taylor 2010 Dublin Institute of Technology

Relativistic Particle Acceleration In Tangled Magnetic Fields, Stephen O'Sullivan, Brian Reville, Andrew Taylor

Conference papers

No abstract provided.


Cloud Computing:Strategies For Cloud Computing Adoption, Faith Shimba 2010 Dublin Institute of Technology

Cloud Computing:Strategies For Cloud Computing Adoption, Faith Shimba

Dissertations

The advent of cloud computing in recent years has sparked an interest from different organisations, institutions and users to take advantage of web applications. This is a result of the new economic model for the Information Technology (IT) department that cloud computing promises. The model promises a shift from an organisation required to invest heavily for limited IT resources that are internally managed, to a model where the organisation can buy or rent resources that are managed by a cloud provider, and pay per use. Cloud computing also promises scalability of resources and on-demand availability of resources.

Although, the adoption ...


Shoreline Evolution: City Of Portsmouth, Virginia Hampton Roads And Elizabeth River Shorelines, Donna A. Milligan, Kevin O'Brien, Christine Wilcox, C. Scott Hardaway Jr 2010 Virginia Institute of Marine Science

Shoreline Evolution: City Of Portsmouth, Virginia Hampton Roads And Elizabeth River Shorelines, Donna A. Milligan, Kevin O'Brien, Christine Wilcox, C. Scott Hardaway Jr

Reports

Shoreline evolution is the change in the shore zone through time. Along the shores of Chesapeake Bay, it is a process and response system. The processes at work include winds, waves, tides and currents which shape and modify coastlines by eroding, transporting and depositing sediments. The shore line is commonly plotted and measured to provide a rate of change, but it is as important to understand the geomorphic patterns of change. Shore analysis provides the basis to know how a particular coast has changed through time and how it might proceed in the future.

The purpose of this data report ...


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