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2012

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Articles 1 - 30 of 11693

Full-Text Articles in Physical Sciences and Mathematics

Analysis Of Salvinorin A In Plants, Water, And Urine Using Solid-Phase Microextraction-Comprehensive Two-Dimensional Gas Chromatography–Time Of Flight Mass Spectrometry, Brian Barnes, Nicholas Snow Jun 2015

Analysis Of Salvinorin A In Plants, Water, And Urine Using Solid-Phase Microextraction-Comprehensive Two-Dimensional Gas Chromatography–Time Of Flight Mass Spectrometry, Brian Barnes, Nicholas Snow

Nicholas A Snow

No abstract provided.


Assessing Content Validity Through Correlation And Relevance Tools A Bayesian Randomized Equivalence Experiment, Byron Gajewski, Diane Boyle, Marjorie Bott, Larry Price, Jamie Leopold, Nancy Dunton Apr 2015

Assessing Content Validity Through Correlation And Relevance Tools A Bayesian Randomized Equivalence Experiment, Byron Gajewski, Diane Boyle, Marjorie Bott, Larry Price, Jamie Leopold, Nancy Dunton

Diane Kay Boyle PhD, RN, FAAN

Content validity elicits expert opinion regarding items of a psychometric instrument. Expert opinion can be elicited in many forms: for example, how essential an item is or its relevancy to a domain. This study developed an alternative tool that elicits expert opinion regarding correlations between each item and its respective domain. With 109 Registered Nurse (RN) site coordinators from National Database of Nursing Quality Indicators, we implemented a randomized Bayesian equivalence trial with coordinators completing ‘‘relevance’’ or ‘‘correlation’’ content tools regarding the RN Job Enjoyment Scale. We confirmed our hypothesis that the two tools would result in equivalent content information ...


Holocene Records Of Fire And Erosion Throughout A Range Of Idaho Ecosystems: What Can Erosional Response Tell Us About Fire Severity And Vegetation Change?, Jennifer Pierce, Kerry Riley, Kerrie Weppner, Michael Poulos, Nathan Nelson, Lar Svenson Mar 2015

Holocene Records Of Fire And Erosion Throughout A Range Of Idaho Ecosystems: What Can Erosional Response Tell Us About Fire Severity And Vegetation Change?, Jennifer Pierce, Kerry Riley, Kerrie Weppner, Michael Poulos, Nathan Nelson, Lar Svenson

Kerry Riley

The question of how climate and climate change influence rates and processes of erosion has become more relevant in the face of ongoing and future anthropogenic warming. In particular, climate-driven increases in fire extent and severity can increase the likelihood and magnitude of post-fire debris flows and sediment-charged floods. We examine evidence of fire-related hillslope erosion and sedimentation in alluvial sediments over Holocene timescales throughout a range of ecosystems in Idaho, USA. Radiocarbondated fire-related deposits from five independent studies record forest-fires and firerelated erosion from sagebrush steppe, pinion-juniper, ponderosa pine, lodgepole pine and mixed conifer forest ecosystems indicate that sedimentation ...


A Comparative Analysis Of Decision Trees Vis-À-Vis Other Computational Data Mining Techniques In Automotive Insurance Fraud Detection, Adrian Gepp, Kuldeep Kumar, J Holton Wilson, Sukanto Bhattacharya Jul 2014

A Comparative Analysis Of Decision Trees Vis-À-Vis Other Computational Data Mining Techniques In Automotive Insurance Fraud Detection, Adrian Gepp, Kuldeep Kumar, J Holton Wilson, Sukanto Bhattacharya

Kuldeep Kumar

No abstract provided.


Meteor-Radar Observed Mesospheric Semi-Annual Oscillation (Sao) And Quasi-Biennial Oscillation (Qbo) Over Maui, Hawaii, Tao Li, Alan Liu, Xian Lu, Zhenhua Li, Steven Franke, Gary Swenson, Xiankang Dou Aug 2013

Meteor-Radar Observed Mesospheric Semi-Annual Oscillation (Sao) And Quasi-Biennial Oscillation (Qbo) Over Maui, Hawaii, Tao Li, Alan Liu, Xian Lu, Zhenhua Li, Steven Franke, Gary Swenson, Xiankang Dou

Zhenhua Li

No abstract provided.


Synthesis And Characterization Of New Light Emitting Probes For Sensitive Detection Of Bio-Molecules And Live Cells, Shyamala Pravin Pillai Dec 2012

Synthesis And Characterization Of New Light Emitting Probes For Sensitive Detection Of Bio-Molecules And Live Cells, Shyamala Pravin Pillai

Dissertations

A variety of contemporary analytical platforms in technical and biological applications take advantage of labeling the objects of interest with fluorescent or luminescent tracers. Luminescent tracers take advantage of the unique property of some lanthanide metals to absorb and emit light. Long lifetime of lanthanide emission allows temporal gating of the signal, which avoids the short-lived background of interfering sample components. This property in combination with large Stokes shift contributes to extreme sensitivity of detection (ca. 10-13-10-14 M), which makes lanthanide-based probes suitable for large variety of challenging tasks ( e.g., intracellular detection of single DNA/RNA ...


Software Requirements As Executable Code, Karen Eileen Wasielewski Morand Dec 2012

Software Requirements As Executable Code, Karen Eileen Wasielewski Morand

All Regis University Theses

This project analyzed the effectiveness of using Story Testing frameworks to create an application directly from user specifications. It did this by taking an example business application with "traditional" specifications and rewriting those specifications in three different Story Testing Frameworks - Cucumber, FitNesse, and JBehave. Analysis of results drew the following conclusions: 1) Story Testing can help prove a project's completeness, 2) Specifications are still too technical, 3) Implementation is not overly complex, and 4) Story Testing is worth it. It proposed future research around evaluating natural languages and seeking more user-friendly ways of writing specifications in a natural language.


Development Of Luminescent Probes For Ultrasensitive Detection Of Biopolymers, Their Complexes, And Living Cells, Laura A. Wirpsza Dec 2012

Development Of Luminescent Probes For Ultrasensitive Detection Of Biopolymers, Their Complexes, And Living Cells, Laura A. Wirpsza

Dissertations

New luminescent probes with enhanced brightness convenient for bioconjugation were synthesized and tested in major biological applications including the detection of nucleic acids and living cells. The first project used luminescent lanthanide ion probes that take advantage of hyper-sensitive acquisition of their long-lived emission signal in time- resolved mode, which avoids short-lived background fluorescence of the medium. Two model carbostyril fluorophores (cs 124-CH3 and cs 124-CF3) were modified by inclusion of two spacers (diamino and bi-phenyl) for the attachment of amine and thiol reactive cross-linking groups. In this project, time-resolved measurements are presented for spectroscopy and microscopy. The ...


Identity-Based Traitor Tracing With Short Private Key And Short Ciphertext, Fuchun Guo, Yi Mu, Willy Susilo Dec 2012

Identity-Based Traitor Tracing With Short Private Key And Short Ciphertext, Fuchun Guo, Yi Mu, Willy Susilo

Faculty of Informatics - Papers (Archive)

Identity-based traitor tracing (IBTT) scheme can be utilized to identify a private (decryption) key of any identity that is illegally used in an identity-based broadcast encryption scheme. In PKC'07, Abdalla et al. proposed the first IBTT construction with short private key. In CCS'08, Boneh and Naor proposed a public-key traitor tracing, which can be extended to IBTT with short ciphertext. With a further exploration, in this paper, we propose the first IBTT with short private key and short ciphertext. Private key and ciphertext are both order of O(l 1+l 2), where l 1 is the bit ...


Nevada Interagency Volunteer Program: Helping Hands Across Public Lands—Phase Ii: Final Project Report, December 31, 2012, Margaret N. Rees Dec 2012

Nevada Interagency Volunteer Program: Helping Hands Across Public Lands—Phase Ii: Final Project Report, December 31, 2012, Margaret N. Rees

Get Outdoors Nevada

  • Maintained a central clearinghouse created for Southern Nevada public lands volunteers, including: ─ an online volunteer data-management application (Volgistics) adopted and customized for the program and populated with 8,500 active and 961 mailing list volunteer records ─ a community outreach Web site that currently averages 8,230 pages viewed per month since July 2007 and has aided in the recruitment of 11,943 volunteers ─ updated website to word press for sustainability ─ branding development and marketing and outreach tool creation
  • Updated Standard Operating Procedures (SOPs) for all areas of Interagency Volunteer Program Management—recruitment, training, recognition, retention of volunteers, event planning, and ...


Sndo Hector's Helpers Youth Engaging The Community Through Social Media: Annual Progress Report, Period Covering June 1, 2012 - December 31, 2012, Margaret N. Rees Dec 2012

Sndo Hector's Helpers Youth Engaging The Community Through Social Media: Annual Progress Report, Period Covering June 1, 2012 - December 31, 2012, Margaret N. Rees

Anti-littering Programs

The Hector’s Helpers Youth Engaging the Community through Social Media project was designed to develop civic and environmental stewardship skills as students receive training in administering social media accounts (e.g., Facebook, twitter, Youtube). The project is an extension of the Hector’s Helpers program developed through a cooperative agreement and run under the branding of Don’t Trash Nevada. Participants in the project are known as the Social Media Squad (SMS). The following activities were completed:

  • Supervision of youth completing the pilot program initiated in an earlier cooperative agreement
  • Recruitment of youth to apply for the Social Media ...


New Economy : Assessment Of The Institutionalization Of An Emerging Paradigm And Academic Field Through Inquiry Into Prominent Boundary Organizations, Jeanine Cava Rodgers Dec 2012

New Economy : Assessment Of The Institutionalization Of An Emerging Paradigm And Academic Field Through Inquiry Into Prominent Boundary Organizations, Jeanine Cava Rodgers

Theses

It is increasingly acknowledged that in order to reach global and regional sustai nabi l ity goals, economic growth and consumption levels in wealthy developed nations will need to stabilize or reverse. Organizations and projects of a wide variety have emerged and expanded to take on this challenge, and shape the so-called, "new economy". The purpose of this research is to gain a clearer picture of the impacts of efforts to develop a shared new-economy knowledge framework on the broader sustai nabi l ity conversation, and to assess the intellectual institutionalization of same. This thesis focuses in on the influence ...


Back Matter Dec 2012

Back Matter

Journal of Digital Forensics, Security and Law

No abstract provided.


Nextgen Flight Deck Data Comm: Auxiliary Synthetic Speech Phase I, Tracy Lennertz, Judith Bürki-Cohen, Andrea L. Sparko, Nickolas D. Macchiarella, Jason Kring, Mike Coman, Tom Haritos, Jeffry Alvarado Dec 2012

Nextgen Flight Deck Data Comm: Auxiliary Synthetic Speech Phase I, Tracy Lennertz, Judith Bürki-Cohen, Andrea L. Sparko, Nickolas D. Macchiarella, Jason Kring, Mike Coman, Tom Haritos, Jeffry Alvarado

Publications

Data Comm—a text-based controller-pilot communication system—is critical to many NextGen improvements. With Data Comm, communication becomes a visual task. Interacting with a visual Data Comm display may yield an unsafe increase in head-down time, particularly for single-pilot operations. This study examined the feasibility of supplementing Data Comm with synthetic speech. To this end, thirty-two pilots flew two experimental scenarios in a Cessna 172 Flight Training Device. In one scenario, ATC communication was with a text-only Data Comm display, in the other, communication was with a text Data Comm display with synthetic speech that read aloud each message (i ...


Front Matter Dec 2012

Front Matter

Journal of Digital Forensics, Security and Law

No abstract provided.


Masthead Dec 2012

Masthead

Journal of Digital Forensics, Security and Law

No abstract provided.


Statistical Methods In Disease Risk Analysis, Disease Testing And Nutrition Epidemiology, Hui Lin Dec 2012

Statistical Methods In Disease Risk Analysis, Disease Testing And Nutrition Epidemiology, Hui Lin

Graduate Theses and Dissertations

The thesis is composed of three separated projects: disease risk scoring systems (chapter 2), statistical tests for proportion difference in one-to-two matched binary data (chapter 3) and bivariate measurement error model for nutrition epidemiology (chapter 4). In the first project, we propose to use group lasso algorithm for logistic regression to construct a risk scoring system for predicting disease in swine. We choose the penalty parameter for the group lasso through leave-one-out cross validation and use the area under the receiver operating characteristic curve as criterion. We show our proposed scoring system is superior to existing methods. The second project ...


Eye Detection Using Discriminatory Features And An Efficient Support Vector Machine, Shuo Chen Dec 2012

Eye Detection Using Discriminatory Features And An Efficient Support Vector Machine, Shuo Chen

Dissertations

Accurate and efficient eye detection has broad applications in computer vision, machine learning, and pattern recognition. This dissertation presents a number of accurate and efficient eye detection methods using various discriminatory features and a new efficient Support Vector Machine (eSVM).

This dissertation first introduces five popular image representation methods - the gray-scale image representation, the color image representation, the 2D Haar wavelet image representation, the Histograms of Oriented Gradients (HOG) image representation, and the Local Binary Patterns (LBP) image representation - and then applies these methods to derive five types of discriminatory features. Comparative assessments are then presented to evaluate the performance ...


Extension To Pv Optics To Include Front Electrode Design In Solar Cells, Debraj Guhabiswas Dec 2012

Extension To Pv Optics To Include Front Electrode Design In Solar Cells, Debraj Guhabiswas

Dissertations

Proper optical designing of solar cells and modules is of paramount importance towards achieving high photovoltaic conversion efficiencies. Modeling softwares such as PV OPTICS, BIRANDY and SUNRAYS have been created to aid such optical designing of cells and modules; but none of these modeling packages take the front metal electrode architecture of a solar cell into account.

A new model, has been developed to include the front metal electrode architecture to finished solar cells for optical calculations. This has been implemented in C++ in order to add a new module to PV OPTICS (NREL’s photovoltaic modeling tool) to include ...


The Goodness-Of-Fit Tests For Geometric Models, Feiyan Chen Dec 2012

The Goodness-Of-Fit Tests For Geometric Models, Feiyan Chen

Dissertations

We propose two types of goodness-of-fit tests for geometric distribution and for a bivariate geometric distribution called BGD(B&D), based on their probability generating function (PGF). The first type is a special-case application of the general testing procedure for discrete distributions proposed by Kocherlakota and Kocherlakota (1986). The second type utilizes the supremum of the absolute value of the standardized difference between the PGF’s maximum likelihood estimator (MLE) and its empirical counterpart as the test statistic. We verify the asymptotic properties of the test statistics for the first type of test and explore the asymptotic behaviors of the ...


Modeling Cell Proliferation In A Perfusion Tissue Engineering Bioreactor, Jeffrey Vincent Pohlmeyer Dec 2012

Modeling Cell Proliferation In A Perfusion Tissue Engineering Bioreactor, Jeffrey Vincent Pohlmeyer

Dissertations

In this dissertation we develop a comprehensive model to simulate a tissue engineering experiment. The experiment takes place in a bioreactor in which a cell seeded porous scaffold is placed, and the scaffold experiences a perfused flow of a nutrient-rich culture medium. The goal of the model is to assist experimentalists in evaluation of different parameter scenarios as the time needed to simulate an experiment is significantly less than the time needed for the experiment itself. We provide the full two-dimensional model development, as well as investigation into possible variations of specific model choices, and we demonstrate the robustness and ...


Theoretical Studies Of Structural And Electronic Properties In Transition Metal Oxides, Tsezar F. Seman Dec 2012

Theoretical Studies Of Structural And Electronic Properties In Transition Metal Oxides, Tsezar F. Seman

Dissertations

The following studies are presented: theory of K-edge resonant inelastic x-ray scattering and its application for La0.5Sr1.5MnO4, effects of rare earth ion size on the stability of the coherent Jahn-Teller distortions in undoped perovskite manganites, and symmetry-mode-based classical and quantum mechanical formalism of lattice dynamics.

The formula based on tight-binding approach for the calculation of K-edge resonant inelastic x-ray scattering (RIXS) spectrum for transition metal oxides is presented first, by extending the previous existing result to include explicit momentum dependence and a basis with multiple core-hole sites. This formula is applied to layered ...


Computing Immutable Regions For Subspace Top-K Queries, Kyriakos Mouratidis, Hwee Hwa Pang Dec 2012

Computing Immutable Regions For Subspace Top-K Queries, Kyriakos Mouratidis, Hwee Hwa Pang

Kyriakos MOURATIDIS

Given a high-dimensional dataset, a top-k query can be used to shortlist the k tuples that best match the user’s preferences. Typically, these preferences regard a subset of the available dimensions (i.e., attributes) whose relative significance is expressed by user-specified weights. Along with the query result, we propose to compute for each involved dimension the maximal deviation to the corresponding weight for which the query result remains valid. The derived weight ranges, called immutable regions, are useful for performing sensitivity analysis, for finetuning the query weights, etc. In this paper, we focus on top-k queries with linear preference ...


Semantically Related Software Terms And Their Taxonomy By Leveraging Collaborative Tagging, Shaowei Wang, David Lo, Lingxiao Jiang Dec 2012

Semantically Related Software Terms And Their Taxonomy By Leveraging Collaborative Tagging, Shaowei Wang, David Lo, Lingxiao Jiang

David LO

Millions of people, including those in the software engineering communities have turned to microblogging services, such as Twitter, as a means to quickly disseminate information. A number of past studies by Treude et al., Storey, and Yuan et al. have shown that a wealth of interesting information is stored in these microblogs. However, microblogs also contain a large amount of noisy content that are less relevant to software developers in engineering software systems. In this work, we perform a preliminary study to investigate the feasibility of automatic classification of microblogs into two categories: relevant and irrelevant to engineering software systems ...


When Would This Bug Get Reported?, Ferdian Thung, David Lo, Lingxiao Jiang, Lucia Lucia, Foyzur Rahman, Premkumar Devanbu Dec 2012

When Would This Bug Get Reported?, Ferdian Thung, David Lo, Lingxiao Jiang, Lucia Lucia, Foyzur Rahman, Premkumar Devanbu

David LO

Millions of people, including those in the software engineering communities have turned to microblogging services, such as Twitter, as a means to quickly disseminate information. A number of past studies by Treude et al., Storey, and Yuan et al. have shown that a wealth of interesting information is stored in these microblogs. However, microblogs also contain a large amount of noisy content that are less relevant to software developers in engineering software systems. In this work, we perform a preliminary study to investigate the feasibility of automatic classification of microblogs into two categories: relevant and irrelevant to engineering software systems ...


Mining Indirect Antagonistic Communities From Social Interactions, Kuan Zhang, David Lo, Ee Peng Lim, Philips Kokoh Prasetyo Dec 2012

Mining Indirect Antagonistic Communities From Social Interactions, Kuan Zhang, David Lo, Ee Peng Lim, Philips Kokoh Prasetyo

David LO

Antagonistic communities refer to groups of people with opposite tastes, opinions, and factions within a community. Given a set of interactions among people in a community, we develop a novel pattern mining approach to mine a set of antagonistic communities. In particular, based on a set of user-specified thresholds, we extract a set of pairs of communities that behave in opposite ways with one another. We focus on extracting a compact lossless representation based on the concept of closed patterns to prevent exploding the number of mined antagonistic communities. We also present a variation of the algorithm using a divide ...


Searching Connected Api Subgraph Via Text Phrases, Wing-Kwan Chan, Hong Cheng, David Lo Dec 2012

Searching Connected Api Subgraph Via Text Phrases, Wing-Kwan Chan, Hong Cheng, David Lo

David LO

Reusing APIs of existing libraries is a common practice during software development, but searching suitable APIs and their usages can be time-consuming [6]. In this paper, we study a new and more practical approach to help users find usages of APIs given only simple text phrases, when users have limited knowledge about an API library. We model API invocations as an API graph and aim to find an optimum connected subgraph that meets users' search needs. The problem is challenging since the search space in an API graph is very huge. We start with a greedy subgraph search algorithm which ...


Learning Extended Fsa From Software: An Empirical Assessment, David Lo, Leonardo Mariani, Mauro Santoro Dec 2012

Learning Extended Fsa From Software: An Empirical Assessment, David Lo, Leonardo Mariani, Mauro Santoro

David LO

A number of techniques that infer finite state automata from execution traces have been used to support test and analysis activities. Some of these techniques can produce automata that integrate information about the data-flow, that is, they also represent how data values affect the operations executed by programs. The integration of information about operation sequences and data values into a unique model is indeed conceptually useful to accurately represent the behavior of a program. However, it is still unclear whether handling heterogeneous types of information, such as operation sequences and data values, necessarily produces higher quality models or not. In ...


Scenario-Based And Value-Based Specification Mining: Better Together, David Lo, Shahar Maoz Dec 2012

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

David LO

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 a data-mining algorithm 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 ...


Observatory Of Trends In Software Related Microblogs, Achananuparp Palakorn, Nelman Lubis Ibrahim, Yuan Tian, David Lo, Ee Peng Lim Dec 2012

Observatory Of Trends In Software Related Microblogs, Achananuparp Palakorn, Nelman Lubis Ibrahim, Yuan Tian, David Lo, Ee Peng Lim

David LO

Microblogging has recently become a popular means to disseminate information among millions of people. Interestingly, software developers also use microblog to communicate with one another. Different from traditional media, microblog users tend to focus on recency and informality of content. Many tweet contents are relatively more personal and Opinionated, compared to that of traditional news report. Thus, by analyzing microblogs, one could get the up-to-date information about what people are interested in or feel toward a particular topic. In this paper, we describe our microblog observatory that aggregates more than 70,000 Twitter feeds, captures software-related tweets, and computes trends ...