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Articles 31621 - 31650 of 32485
Full-Text Articles in Entire DC Network
Linear Precoding For The Mimo Multiple Access Channel With Finite Alphabet Inputs And Statistical Csi, Yongpeng Wu, Chao Kai Wen, Chengshan Xiao, Xiqi Gao, Robert Schober
Linear Precoding For The Mimo Multiple Access Channel With Finite Alphabet Inputs And Statistical Csi, Yongpeng Wu, Chao Kai Wen, Chengshan Xiao, Xiqi Gao, Robert Schober
Electrical and Computer Engineering Faculty Research & Creative Works
In this paper, we investigate the design of linear precoders for the multiple-input-multiple-output (MIMO) multiple access channel (MAC). We assume that statistical channel state information (CSI) is available at the transmitters and consider the problem under the practical finite alphabet input assumption. First, we derive an asymptotic (in the large system limit) expression for the weighted sum rate (WSR) of the MIMO MAC with finite alphabet inputs and Weichselberger's MIMO channel model. Subsequently, we obtain the optimal structures of the linear precoders of the users maximizing the asymptotic WSR and an iterative algorithm for determining the precoders. We show that …
A Longitudinal Study Of Students' Reasoning About Variation In Distributions In An Introductory College Statistics Course, Rachel Marie Chaphalkar
A Longitudinal Study Of Students' Reasoning About Variation In Distributions In An Introductory College Statistics Course, Rachel Marie Chaphalkar
Graduate Student Theses, Dissertations, & Professional Papers
Current curricular documents including the Common Core State Standards (2010) and the Guidelines for Assessment and Instruction in Statistics Education (2005) have increased the need for students' understanding and reasoning about statistics at both the K-12 and college levels. In addition, an increasing number of students are taking the Advanced Placement Statistics Exam (College Board, 2011) or a college-level introductory statistics course (Scheaffer & Stasny, 2000). One of the main components for statistical thinking is consideration of variation (Wild & Pfannkuch, 1999). Previous studies have shown that students have misconceptions about variation (e.g. Reading, 2004; Torok & Watson, 1999) and …
Dispersion Characteristics Analysis Of One Dimensional Multiple Periodic Structures And Their Applications To Antennas, Zi Long Ma, Li (Lijun) Jun Jiang, Shulabh Gupta, Wei E.I. Sha
Dispersion Characteristics Analysis Of One Dimensional Multiple Periodic Structures And Their Applications To Antennas, Zi Long Ma, Li (Lijun) Jun Jiang, Shulabh Gupta, Wei E.I. Sha
Electrical and Computer Engineering Faculty Research & Creative Works
This paper proposes a general characterization of one dimensional multiple periodic (MP) structures for electromagnetic transmission and radiation. Studies are conducted from three aspects: Firstly, the dispersion relations of non-dispersive (conventional) and dispersive (composite right/left-handed (CRLH)) materials are analyzed. Regarding each category of materials, detailed analyses for distributed layered media and lumped circuits are presented. Through studies, we found that the periodicity increase opens up multiple stopbands. According to our physical explanations and numerical results, the relation between stopbands and periodicity is clarified. Additionally, the periodicity increase also reduces the separation distance of space harmonic modes along the phase constant …
The Drunken Path: Discerning Women's Voices And Participation In The Informal Economy Of Illegal Manufacturing Of Prohibition Alcohol In The Historical And Archaeological Record, Kelli M. Casias
Graduate Student Theses, Dissertations, & Professional Papers
This thesis puts the Prohibition years in Anaconda and Butte, Montana, into historical, and sociocultural context to discover an engendered narrative of liquor law violators between the years 1923 and 1926 and to investigate the scope of the local informal, illegal, illicit economic systems dictating the distribution of illegal liquor during that era. The transference of the means and modes of production, as envisioned by Karl Marx, and collective social resistance serve as the theoretical frameworks for analysis and examination of three case studies. The first, Poacher Gulch is a remote mining site in western Montana, was the subject of …
Selective Solid Phase Extraction Of Uranium Using An Aminophosphonic Acid Functionalized Composite Material, Ranalda Tsosie
Selective Solid Phase Extraction Of Uranium Using An Aminophosphonic Acid Functionalized Composite Material, Ranalda Tsosie
Graduate Student Theses, Dissertations, & Professional Papers
Uranium is an element of interest because it is an abundant source of concentrated energy. In 1948 the US offered money for uranium ore mined in the US, which created a mining boom in the southwest that included the Navajo Reservation. During the late 1960s the demand for uranium decreased and many mining operations shutdown and left behind a legacy of contamination. As a result many Navajo communities have numerous water sources that exceed established maximum contamination levels for uranium and other toxic metals. These contaminations are a direct result of abandoned Cold War uranium mines and mill waste sites …
Spectroelectrochemistry And Modeling Of Enargite (Cu3ass4) Under Atmospheric Conditions, Robert Nick Gow
Spectroelectrochemistry And Modeling Of Enargite (Cu3ass4) Under Atmospheric Conditions, Robert Nick Gow
Graduate Student Theses, Dissertations, & Professional Papers
Raman spectroscopy has been a useful technology for fundamental studies in the mining industry. Surface changes through oxidation and reduction reactions can be monitored in-situ, allowing the changes to be monitored in real time. In conjunction with cyclic voltammetry, to change the conditions at which a mineral surface is subjected to, reaction and reaction conditions can be identified. The results can then be plotted to create a map similar to that of an EH-pH diagram.
Non-Coding Rnas Of The Q Fever Agent, Coxiella Burnetii, Indu Ramesh Warrier
Non-Coding Rnas Of The Q Fever Agent, Coxiella Burnetii, Indu Ramesh Warrier
Graduate Student Theses, Dissertations, & Professional Papers
Coxiella burnetii is an obligate intracellular bacterial pathogen that undergoes a biphasic developmental cycle, alternating between a small cell variant (SCV) and a large cell variant (LCV). Despite the remarkable niche and life cycle of C. burnetii, little is known about its modes of regulation and the roles that non-coding RNAs play in its growth and development. One such element is the intervening sequence (IVS); a 444-nt RNA element that is inserted within helix 45 of CoxiellaÆs precursor 23S rRNA. C. burnetii may have acquired IVS through horizontal transfer, and it has been subsequently maintained by all strains of C. …
Intraosseous Vascular Access In The Emergency Department, Nicole M. Helsper Devoe
Intraosseous Vascular Access In The Emergency Department, Nicole M. Helsper Devoe
Doctor of Nursing Practice (DNP) Practice Innovation Projects
Current guidelines and recommendations from the American College of Surgeons Advanced Trauma Life Support and the American Heart Association (AHA) include intraosseous (IO) access as a second-line alternative when delayed or failed peripheral vascular access occurs in emergent or trauma situations. IO access is underutilized in the emergency department (ED) due to registered nurses’ knowledge deficit, lack of training and education, and lack of supplies (Cheung, Rosenberg, & Vaillancourt, 2014). The National Association of EMS Physicians (NAEMSP) supports the use of IO access and describes IOs as a significant time saving intervention in achieving vascular access and decreasing the time …
Chemotherapy-Induced Peripheral Neuropathy Education And Assessment, Kim Schmidt
Chemotherapy-Induced Peripheral Neuropathy Education And Assessment, Kim Schmidt
Doctor of Nursing Practice (DNP) Practice Innovation Projects
Chemotherapy-induced peripheral neuropathy (CIPN) is a debilitating side effect of most chemotherapeutic agents used to treat cancer. To ensure the best possible care and outcomes for patients, nurses should be at the forefront of CIPN education and patient assessments. The purpose of this project was to evaluate an educational intervention for oncology nurses on CIPN and CIPN patient assessment by assessing the knowledge and confidence level of nurses in assessing CIPN before and after an educational session. The methodology for this project was a quasi-experimental one-group pretest multiple posttest design with a convenience sample of nurses employed by the Cancer …
Does The Presumption Of Validity Matter? An Experimental Assessment, Jeremy W. Brock
Does The Presumption Of Validity Matter? An Experimental Assessment, Jeremy W. Brock
University of Richmond Law Review
No abstract provided.
Infinite Product Representations For Kernels And Iteration Of Functions, Daniel Alpay, Palle Jorgensen, Izchak Lewkowicz, Itzik Marziano
Infinite Product Representations For Kernels And Iteration Of Functions, Daniel Alpay, Palle Jorgensen, Izchak Lewkowicz, Itzik Marziano
Mathematics, Physics, and Computer Science Faculty Articles and Research
We study infinite products of reproducing kernels with view to their use in dynamics (of iterated function systems), in harmonic analysis, and in stochastic processes. On the way, we construct a new family of representations of the Cuntz relations. Then, using these representations we associate a fixed filled Julia set with a Hilbert space. This is based on analysis and conformal geometry of a fixed rational mapping R in one complex variable, and its iterations.
Aerosol Optical Properties Over Mount Song, A Rural Site In Central China, Lunche Wang, Wei Gong, Ramesh P. Singh, Xiangao Xia, Huizheng Che, Ming Zhang, Hong Lin
Aerosol Optical Properties Over Mount Song, A Rural Site In Central China, Lunche Wang, Wei Gong, Ramesh P. Singh, Xiangao Xia, Huizheng Che, Ming Zhang, Hong Lin
Mathematics, Physics, and Computer Science Faculty Articles and Research
Seasonal variations of aerosol optical depth (AOD), Ångström exponent (α), single scattering albedo (SSA), water vapor content (WVC), aerosol size distribution and refractive index at Mount Song, a rural site in Central China are analyzed using ground-based sunphotometer data for the period April 2012 to May 2014 for the first time. The results show that the area is highly polluted even the major anthropogenic emission sources are far away. Seasonal mean AOD is high (0.72 ± 0.52) during summer (June–August) season and low (0.51 ± 0.38) during autumn (September–November) season. The monthly mean α is very low (0.81 ± 0.30) …
E-Mail Authorship Attribution Using Customized Associative Classification, Michael R. Schmid, Farkhund Iqbal, Benjamin C.M. Fung
E-Mail Authorship Attribution Using Customized Associative Classification, Michael R. Schmid, Farkhund Iqbal, Benjamin C.M. Fung
All Works
E-mail communication is often abused for conducting social engineering attacks including spamming, phishing, identity theft and for distributing malware. This is largely attributed to the problem of anonymity inherent in the standard electronic mail protocol. In the literature, authorship attribution is studied as a text categorization problem where the writing styles of individuals are modeled based on their previously written sample documents. The developed model is employed to identify the most plausible writer of the text. Unfortunately, most existing studies focus solely on improving predictive accuracy and not on the inherent value of the evidence collected. In this study, we …
Enhancing Social Science Research In The Uae: An Open Source Software Solution University Of Sharjah (Uos) Case Study, Manar Abu Talib, Muhammed Abuodeh, Adhraa Almansoori, Arwa Alnauimi
Enhancing Social Science Research In The Uae: An Open Source Software Solution University Of Sharjah (Uos) Case Study, Manar Abu Talib, Muhammed Abuodeh, Adhraa Almansoori, Arwa Alnauimi
All Works
© 2015 The Manar Abu Talib, Muhammed AbuOdeh, Adhraa Almansoori and Arwa AlNauimi. Researchers, practitioners and social scientists all agree on the enormous importance of social science research in advancing human knowledge and informing public policy makers. The National Research Foundation, along with other organizations in the UAE, is leading the initiative to integrate the efforts of social research institutions in order to support the decision making process in the UAE. As indicated by a number of social researchers during the last forum held on May 29-30, 2012, at the Emirates Center for Strategic Studies and Research, Abu Dhabi, UAE, …
Winter Habitat Associations Of Blackbirds And Starlings Wintering In The South-Central United States, Matthew Strassburg, Shawn M. Crimmins, Patrick C. Mckann, Wayne E. Thogmartin
Winter Habitat Associations Of Blackbirds And Starlings Wintering In The South-Central United States, Matthew Strassburg, Shawn M. Crimmins, Patrick C. Mckann, Wayne E. Thogmartin
Human–Wildlife Interactions
Birds can cause extensive crop damage in the United States. In some regions, depredating species comprise a substantial portion of the total avian population, emphasizing their importance both economically and ecologically. We used the National Audubon Society Christmas Bird Count data from the south-central United States and mixed-effects models to identify habitat factors associated with population trend and abundance for 5 species: red-winged blackbird (Agelaius phoeniceus), common grackle (Quiscalus quiscula), rusty blackbird (Euphagus carolinus), Brewer’s blackbird (Euphagus cyanocephalus), and European starling (Sturnus vulgaris). Overall, we found positive associations between bird …
Factors Influencing Digital Forensic Investigations: Empirical Evaluation Of 12 Years Of Dubai Police Cases, Ibtesam Alawadhi, Janet Read, Andrew Marrington, Virginia Franqueira
Factors Influencing Digital Forensic Investigations: Empirical Evaluation Of 12 Years Of Dubai Police Cases, Ibtesam Alawadhi, Janet Read, Andrew Marrington, Virginia Franqueira
All Works
In Digital Forensics, the number of person-hours spent on investigation is a key factor which needs to be kept to a minimum whilst also paying close attention to the authenticity of the evidence. The literature describes challenges behind increasing person-hours and identifies several factors which contribute to this phenomenon. This paper reviews these factors and demonstrates that they do not wholly account for increases in investigation time. Using real case records from the Dubai Police, an extensive study explains the contribution of other factors to the increase in person-hours. We conclude this work by emphasizing on several factors affecting the …
Monolithic Optofluidic Ring Resonator Lasers Created By Femtosecond Laser Nanofabrication, Hengky Chandrahalim, Qiushu Chen, Ali A. Said, Mark Dugan, Xudong Fan
Monolithic Optofluidic Ring Resonator Lasers Created By Femtosecond Laser Nanofabrication, Hengky Chandrahalim, Qiushu Chen, Ali A. Said, Mark Dugan, Xudong Fan
Faculty Publications
We designed, fabricated, and characterized a monolithically integrated optofluidic ring resonator laser that is mechanically, thermally, and chemically robust. The entire device, including the ring resonator channel and sample delivery microfluidics, was created in a block of fused-silica glass using a 3-dimensional femtosecond laser writing process. The gain medium, composed of Rhodamine 6G (R6G) dissolved in quinoline, was flowed through the ring resonator. Lasing was achieved at a pump threshold of approximately 15 μJ/mm2. Detailed analysis shows that the Q-factor of the optofluidic ring resonator is 3.3 × 104, which is limited by both solvent …
High-Resolution Bottom-Loss Estimation Using The Ambient-Noise Vertical Coherence Function, Lanfranco Muzi, Martin Siderius, Jorge E. Quijano, Stan E. Dosso
High-Resolution Bottom-Loss Estimation Using The Ambient-Noise Vertical Coherence Function, Lanfranco Muzi, Martin Siderius, Jorge E. Quijano, Stan E. Dosso
Electrical and Computer Engineering Faculty Publications and Presentations
The seabed reflection loss (shortly "bottom loss") is an important quantity for predicting transmission loss in the ocean. A recent passive technique for estimating the bottom loss as a function of frequency and grazing angle exploits marine ambient noise (originating at the surface from breaking waves, wind, and rain) as an acoustic source. Conventional beamforming of the noise field at a vertical line array of hydrophones is a fundamental step in this technique, and the beamformer resolution in grazing angle affects the quality of the estimated bottom loss. Implementation of this technique with short arrays can be hindered by their …
Eigenvector Pruning Method For High Resolution Beamforming, Jorge E. Quijano, Lisa M. Zurk
Eigenvector Pruning Method For High Resolution Beamforming, Jorge E. Quijano, Lisa M. Zurk
Electrical and Computer Engineering Faculty Publications and Presentations
This paper introduces an eigenvector pruning algorithm for the estimation of the signal-plus-interference eigenspace, required as a preliminary step to subspace beamforming. The proposed method considers large-aperture passive array configurations operating in environments with multiple maneuvering targets in background noise, in which the available data for estimation of sample covariances and eigenvectors are limited. Based on statistical properties of scalar products between deterministic and complex random vectors, this work defines a statistically justified threshold to identify target-related features embedded in the sample eigenvectors, leading to an estimator for the signal-bearing eigenspace. It is shown that data projection into this signal …
Coupled-Oscillator Associative Memory Array Operation For Pattern Recognition, Dmitri E. Nikonov, Gyorgy Csaba, Wolfgang Porod, Tadashi Shibata, Danny Voils, Dan Hammerstrom, Ian A. Young, George I. Bourianoff
Coupled-Oscillator Associative Memory Array Operation For Pattern Recognition, Dmitri E. Nikonov, Gyorgy Csaba, Wolfgang Porod, Tadashi Shibata, Danny Voils, Dan Hammerstrom, Ian A. Young, George I. Bourianoff
Electrical and Computer Engineering Faculty Publications and Presentations
Operation of the array of coupled oscillators underlying the associative memory function is demonstrated for various interconnection schemes (cross-connect, star phase keying and star frequency keying) and various physical implementation of oscillators (van der Pol, phase-locked loop, spin torque). The speed of synchronization of oscillators and the evolution of the degree of matching is studied as a function of device parameters. The dependence of errors in association on the number of the memorized patterns and the distance between the test and the memorized pattern is determined for Palm, Furber and Hopfield association algorithms.
Wavelet-Coupled Machine Learning Methods For Drought Forecast Utilizing Hybrid Meteorological And Remotely-Sensed Data, R. Tan, Marek Perkowski
Wavelet-Coupled Machine Learning Methods For Drought Forecast Utilizing Hybrid Meteorological And Remotely-Sensed Data, R. Tan, Marek Perkowski
Electrical and Computer Engineering Faculty Publications and Presentations
In this study, a statistical drought early warning method is proposed using novel machine learning algorithms, with the inclusion of multiple drought-related attributes from precipitation, satellite-derived land cover vegetation indices, and surface discharge. The forecast is made for the long-term hydrological drought in the region of Central Valley, California. The wavelet transform analysis is employed in combination with support vector regression and artificial neural network algorithms for improving the drought prediction effectiveness. The performance of the drought prediction is evaluated using three statistical metrics: Coefficient of Determination (R2 ), Root-Mean-Square Error (RMSE), and Mean-Absolute-Error (MAE). The results clearly indicate that …
Defensive Routines In Engineering Managers And Non-Engineering Managers -- A Case Analysis, Tyria Riley, Elizabeth A. Cudney
Defensive Routines In Engineering Managers And Non-Engineering Managers -- A Case Analysis, Tyria Riley, Elizabeth A. Cudney
Engineering Management and Systems Engineering Faculty Research & Creative Works
There is a perception that engineers experience challenges in areas such as communication, conflict resolution, and leadership. Defensive routines are actions implemented as a result of being in an embarrassing or threatening situation. This research uses a case study approach to measure whether defensive routines are more common in engineering managers or non-engineering managers. Twenty-seven managers created case studies based on their unique experiences as managers. These case studies were scored, and the results of this research indicate that engineering managers employ defensive routines more commonly than non-engineering managers.
Building A Scholarly Network In Learning Communities At The University Of Nebraska–Lincoln, Charlene Maxey-Harris, Lorna M. Dawes
Building A Scholarly Network In Learning Communities At The University Of Nebraska–Lincoln, Charlene Maxey-Harris, Lorna M. Dawes
University of Nebraska-Lincoln Libraries: Faculty Publications
In 2011 the Chancellor at the University of Nebraska – Lincoln (UNL) charged each department and academic unit within the university to create programs and strategies to increase student enrollment within the next six years. The UNL Libraries embraced this goal by becoming more involved in the first-year experience programs and the first-year learning communities. This chapter will outline how the UNL Libraries gained library administration support to hire a Learning Communities/First-Year Experience Librarian and describe how they applied the theory of threshold concepts to develop a series of workshops and e-booklets to teach information literacy skills to students affiliated …
Vulnerable Populations' Perspectives On Climate Engineering, Wylie Allen Carr
Vulnerable Populations' Perspectives On Climate Engineering, Wylie Allen Carr
Graduate Student Theses, Dissertations, & Professional Papers
Over the past decade, climate engineering—or the intentional, large-scale manipulation of the global environment to reduce or reverse anthropogenic climate change—has garnered increasing attention from scientists and policymakers. However, impacts from climate engineering will be unevenly distributed. Vulnerable populations already being disproportionately impacted by climate change might benefit or be made worse off. As such, legislators, members of the public, and academics alike have asserted that vulnerable populations deserve to have a say in the research and development of climate engineering technologies and the policies that will govern them. These calls have gone largely unfulfilled. The research presented in this …
Strategies To Enhance Learning In A Large Engineering Economics Course: Including Students’ Perceived Values In The Instructional Redesign Process, Kellie S. Grasman, D. Cernusca
Strategies To Enhance Learning In A Large Engineering Economics Course: Including Students’ Perceived Values In The Instructional Redesign Process, Kellie S. Grasman, D. Cernusca
Engineering Management and Systems Engineering Faculty Research & Creative Works
Purposeful implementation of technology in instructional design presents opportunities to increase institutional efficiency while simultaneously improving instructional quality. This paper presents findings from the implementation of a hybrid/buffet approach in an undergraduate Engineering Economics large course. A Design-Based Research (DBR) approach informed the instructional redesign and measured its effectiveness through multiple iterations, or macro-cycles, of implementation. Overall, pedagogical structure and specific technology solutions applied to each course component are described, as well as preliminary measures of effectiveness and student perception from a pilot offering of the hybrid/buffet course. Encouraged by positive preliminary results, a second implementation informed further study of …
The Last Wolves Of Isle Royale, Kasey Rahn
The Last Wolves Of Isle Royale, Kasey Rahn
Graduate Student Theses, Dissertations, & Professional Papers
Isle Royale National Park, located in Michigan, is home to a wolf population that is in decline due to complications from inbreeding. Scientists and managers struggle to decide whether to intervene. Some scientists promote bringing new wolves to the island to restore the population because they say the decline is human-caused. Others promote “watchful waiting.” To date, the National Park Service has not interceded and is currently undergoing a management planning process. The issue raises questions about what it means to manage wildlife in an era of change. Should humans intervene to protect wildlife in the face of climate change …
An Adventurous E-Reader For Non-Linear E-Books, Emily Palmieri
An Adventurous E-Reader For Non-Linear E-Books, Emily Palmieri
Graduate Student Theses, Dissertations, & Professional Papers
Non-linear books are published in print format as sequential text or digitally as collections of documents linked together via hyperlinks. These publication methods are problematic for readers and authors alike. Readers are often presented with unintuitive interfaces that do not indicate critical contextual information; authors struggle to order non-linear content into linear formats or to create and distribute their work in resource intensive digital mediums. While standard e-books might be a convenient format for non-linear books, current e-readers used to view them are severely limited; they mimic the format of physical books and fail to solve problems inherent in displaying …
On The Map, But Off The Grid: Perceptions Of Authenticity In Polebridge, Montana, William Klaczynski
On The Map, But Off The Grid: Perceptions Of Authenticity In Polebridge, Montana, William Klaczynski
Graduate Student Theses, Dissertations, & Professional Papers
No abstract provided.
A Service Oriented Broker-Based Approach For Dynamic Resource Discovery In Virtual Networks, Sleiman Rabah, May El Barachi, Nadjia Kara, Rachida Dssouli, Joey Paquet
A Service Oriented Broker-Based Approach For Dynamic Resource Discovery In Virtual Networks, Sleiman Rabah, May El Barachi, Nadjia Kara, Rachida Dssouli, Joey Paquet
All Works
© 2015, Rabah et al.; licensee Springer. In the past few years, the concept of network virtualization has received significant attention from industry and research fora. This concept applies virtualization to networking infrastructures by enabling the dynamic creation of several co-existing logical network instances (or virtual networks) over a shared physical network infrastructure (or substrate network). Due to the potential it offers in terms of diversifying existing networks and ensuring the co-existence of heterogeneous network architectures on top of shared substrates, network virtualization is often considered as an enabler of a polymorphic Internet and a cornerstone of the future Internet …
Quasi-Subjectivity And Ethics In Non-Modernity, Justin T. Simpson
Quasi-Subjectivity And Ethics In Non-Modernity, Justin T. Simpson
UNF Graduate Theses and Dissertations
The inspiration behind this philosophical endeavor is an ethical one: interested in what it means to flourish as a human being – how to live well and authentically. Similar to medicine and how the ability to prescribe the appropriate treatment depends on first making a diagnosis, the focus of this work will to be understand the human condition and the ways in which subjectivity, one’s sense of self, is constituted. Given the general dissatisfaction with the modern metaphysical picture of the world, which analyzes the world in terms of the mutually exclusive and completely separate categories of nature/objects and society/subjects, …